diff --git a/Makefile.in b/Makefile.in index 5c90d6f..a7d571c 100644 --- a/Makefile.in +++ b/Makefile.in @@ -59,7 +59,7 @@ LDFLAGS=-L. -Lopenbsd-compat/ -Lcontrib/win32/win32compat @LDFLAGS@ EXEEXT=@EXEEXT@ MANFMT=@MANFMT@ -TARGETS=ssh$(EXEEXT) sshd$(EXEEXT) ssh-add$(EXEEXT) ssh-keygen$(EXEEXT) ssh-keyscan${EXEEXT} ssh-keysign${EXEEXT} ssh-pkcs11-helper$(EXEEXT) ssh-agent$(EXEEXT) scp$(EXEEXT) sftp-server$(EXEEXT) sftp$(EXEEXT) +TARGETS=ssh$(EXEEXT) sshd$(EXEEXT) ssh-add$(EXEEXT) ssh-keygen$(EXEEXT) ssh-keyscan${EXEEXT} ssh-keysign${EXEEXT} ssh-pkcs11-helper$(EXEEXT) ssh-agent$(EXEEXT) sftp-server$(EXEEXT) sftp$(EXEEXT) LIBSSH_OBJS=acss.o authfd.o authfile.o bufaux.o bufbn.o buffer.o \ canohost.o channels.o cipher.o cipher-acss.o cipher-aes.o \ diff --git a/addrmatch.c b/addrmatch.c index 5b6773c..70b050e 100644 --- a/addrmatch.c +++ b/addrmatch.c @@ -1,4 +1,4 @@ -/* $OpenBSD: addrmatch.c,v 1.5 2010/02/26 20:29:54 djm Exp $ */ +/* $OpenBSD: addrmatch.c,v 1.10 2015/07/08 19:04:21 markus Exp $ */ /* * Copyright (c) 2004-2008 Damien Miller @@ -31,7 +31,6 @@ #include "match.h" #include "log.h" -#include "xmalloc.h" struct xaddr { sa_family_t af; @@ -88,13 +87,13 @@ addr_sa_to_xaddr(struct sockaddr *sa, socklen_t slen, struct xaddr *xa) switch (sa->sa_family) { case AF_INET: - if (slen < sizeof(*in4)) + if (slen < (socklen_t)sizeof(*in4)) return -1; xa->af = AF_INET; memcpy(&xa->v4, &in4->sin_addr, sizeof(xa->v4)); break; case AF_INET6: - if (slen < sizeof(*in6)) + if (slen < (socklen_t)sizeof(*in6)) return -1; xa->af = AF_INET6; memcpy(&xa->v6, &in6->sin6_addr, sizeof(xa->v6)); @@ -318,7 +317,7 @@ addr_pton_cidr(const char *p, struct xaddr *n, u_int *l) char addrbuf[64], *mp, *cp; /* Don't modify argument */ - if (p == NULL || strlcpy(addrbuf, p, sizeof(addrbuf)) > sizeof(addrbuf)) + if (p == NULL || strlcpy(addrbuf, p, sizeof(addrbuf)) >= sizeof(addrbuf)) return -1; if ((mp = strchr(addrbuf, '/')) != NULL) { @@ -420,7 +419,7 @@ addr_match_list(const char *addr, const char *_list) goto foundit; } } - xfree(o); + free(o); return ret; } @@ -494,7 +493,7 @@ addr_match_cidr_list(const char *addr, const char *_list) continue; } } - xfree(o); + free(o); return ret; } diff --git a/atomicio.c b/atomicio.c index 601b3c3..b1ec234 100644 --- a/atomicio.c +++ b/atomicio.c @@ -1,4 +1,4 @@ -/* $OpenBSD: atomicio.c,v 1.26 2010/09/22 22:58:51 djm Exp $ */ +/* $OpenBSD: atomicio.c,v 1.27 2015/01/16 06:40:12 deraadt Exp $ */ /* * Copyright (c) 2006 Damien Miller. All rights reserved. * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved. @@ -41,6 +41,7 @@ #endif #include #include +#include #include "atomicio.h" @@ -56,8 +57,10 @@ atomicio6(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n, ssize_t res; struct pollfd pfd; +#ifndef BROKEN_READ_COMPARISON pfd.fd = fd; pfd.events = f == read ? POLLIN : POLLOUT; +#endif while (n > pos) { res = (f) (fd, s + pos, n - pos); switch (res) { @@ -65,7 +68,9 @@ atomicio6(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n, if (errno == EINTR) continue; if (errno == EAGAIN || errno == EWOULDBLOCK) { +#ifndef BROKEN_READ_COMPARISON (void)poll(&pfd, 1, -1); +#endif continue; } return 0; diff --git a/audit-bsm.c b/audit-bsm.c index 69b5037..6dbe35a 100644 --- a/audit-bsm.c +++ b/audit-bsm.c @@ -1,4 +1,4 @@ -/* $Id: audit-bsm.c,v 1.7 2011/01/17 10:15:29 dtucker Exp $ */ +/* $Id: audit-bsm.c,v 1.8 2012/02/23 23:40:43 dtucker Exp $ */ /* * TODO @@ -55,6 +55,10 @@ #include #include +#ifdef BROKEN_BSM_API +#include +#endif + #include "ssh.h" #include "log.h" #include "key.h" @@ -124,6 +128,12 @@ extern int aug_daemon_session(void); extern Authctxt *the_authctxt; static AuditInfoTermID ssh_bsm_tid; +#ifdef BROKEN_BSM_API +/* For some reason this constant is no longer defined + in Solaris 11. */ +#define BSM_TEXTBUFSZ 256 +#endif + /* Below is the low-level BSM interface code */ /* @@ -171,6 +181,65 @@ aug_get_machine(char *host, u_int32_t *addr, u_int32_t *type) } #endif +#ifdef BROKEN_BSM_API +/* + In Solaris 11 the audit daemon has been moved to SMF. In the process + they simply dropped getacna() from the API, since it read from a now + non-existent config file. This function re-implements getacna() to + read from the SMF repository instead. + */ +int +getacna(char *auditstring, int len) +{ + scf_handle_t *handle = NULL; + scf_property_t *property = NULL; + scf_value_t *value = NULL; + int ret = 0; + + handle = scf_handle_create(SCF_VERSION); + if (handle == NULL) + return -2; /* The man page for getacna on Solaris 10 states + we should return -2 in case of error and set + errno to indicate the error. We don't bother + with errno here, though, since the only use + of this function below doesn't check for errors + anyway. + */ + + ret = scf_handle_bind(handle); + if (ret == -1) + return -2; + + property = scf_property_create(handle); + if (property == NULL) + return -2; + + ret = scf_handle_decode_fmri(handle, + "svc:/system/auditd:default/:properties/preselection/naflags", + NULL, NULL, NULL, NULL, property, 0); + if (ret == -1) + return -2; + + value = scf_value_create(handle); + if (value == NULL) + return -2; + + ret = scf_property_get_value(property, value); + if (ret == -1) + return -2; + + ret = scf_value_get_astring(value, auditstring, len); + if (ret == -1) + return -2; + + scf_value_destroy(value); + scf_property_destroy(property); + scf_handle_destroy(handle); + + return 0; +} +#endif + /* * Check if the specified event is selected (enabled) for auditing. * Returns 1 if the event is selected, 0 if not and -1 on failure. @@ -223,7 +292,15 @@ bsm_audit_record(int typ, char *string, au_event_t event_no) (void) au_write(ad, au_to_text(string)); (void) au_write(ad, AUToReturnFunc(typ, rc)); +#ifdef BROKEN_BSM_API + /* The last argument is the event modifier flags. For + some seemingly undocumented reason it was added in + Solaris 11. */ + rc = au_close(ad, AU_TO_WRITE, event_no, 0); +#else rc = au_close(ad, AU_TO_WRITE, event_no); +#endif + if (rc < 0) error("BSM audit: %s failed to write \"%s\" record: %s", __func__, string, strerror(errno)); diff --git a/auth-bsdauth.c b/auth-bsdauth.c index a9e8443..2f4dbd2 100644 --- a/auth-bsdauth.c +++ b/auth-bsdauth.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-bsdauth.c,v 1.11 2007/09/21 08:15:29 djm Exp $ */ +/* $OpenBSD: auth-bsdauth.c,v 1.13 2014/06/24 01:13:21 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -24,7 +24,6 @@ */ #include "includes.h" - /* * We support only client side kerberos on Windows. */ @@ -35,6 +34,8 @@ #endif #include +#include +#include #include @@ -63,6 +64,11 @@ bsdauth_query(void *ctx, char **name, char **infotxt, Authctxt *authctxt = ctx; char *challenge = NULL; + *infotxt = NULL; + *numprompts = 0; + *prompts = NULL; + *echo_on = NULL; + if (authctxt->as != NULL) { debug2("bsdauth_query: try reuse session"); challenge = auth_getitem(authctxt->as, AUTHV_CHALLENGE); diff --git a/auth-chall.c b/auth-chall.c index 919b1ea..60c9f14 100644 --- a/auth-chall.c +++ b/auth-chall.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-chall.c,v 1.12 2006/08/03 03:34:41 deraadt Exp $ */ +/* $OpenBSD: auth-chall.c,v 1.14 2014/06/24 01:13:21 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -26,14 +26,16 @@ #include "includes.h" #include - #include +#include +#include #include "xmalloc.h" #include "key.h" #include "hostfile.h" #include "auth.h" #include "log.h" +#include "misc.h" #include "servconf.h" /* limited protocol v1 interface to kbd-interactive authentication */ @@ -69,11 +71,11 @@ get_challenge(Authctxt *authctxt) fatal("get_challenge: numprompts < 1"); challenge = xstrdup(prompts[0]); for (i = 0; i < numprompts; i++) - xfree(prompts[i]); - xfree(prompts); - xfree(name); - xfree(echo_on); - xfree(info); + free(prompts[i]); + free(prompts); + free(name); + free(echo_on); + free(info); return (challenge); } @@ -102,11 +104,11 @@ verify_response(Authctxt *authctxt, const char *response) authenticated = 1; for (i = 0; i < numprompts; i++) - xfree(prompts[i]); - xfree(prompts); - xfree(name); - xfree(echo_on); - xfree(info); + free(prompts[i]); + free(prompts); + free(name); + free(echo_on); + free(info); break; } device->free_ctx(authctxt->kbdintctxt); diff --git a/auth-krb5.c b/auth-krb5.c index a5ca109..41dec59 100644 --- a/auth-krb5.c +++ b/auth-krb5.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-krb5.c,v 1.19 2006/08/03 03:34:41 deraadt Exp $ */ +/* $OpenBSD: auth-krb5.c,v 1.20 2013/07/20 01:55:13 djm Exp $ */ /* * Kerberos v5 authentication and ticket-passing routines. * @@ -49,6 +49,7 @@ #include "packet.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "uidswap.h" #include "key.h" @@ -88,6 +89,7 @@ auth_krb5_password(Authctxt *authctxt, const char *password) krb5_ccache ccache = NULL; int len; char *client, *platform_client; + const char *errmsg; /* get platform-specific kerberos client principal name (if it exists) */ platform_client = platform_krb5_get_principal_name(authctxt->pw->pw_name); @@ -105,7 +107,12 @@ auth_krb5_password(Authctxt *authctxt, const char *password) goto out; #ifdef HEIMDAL +# ifdef HAVE_KRB5_CC_NEW_UNIQUE + problem = krb5_cc_new_unique(authctxt->krb5_ctx, + krb5_mcc_ops.prefix, NULL, &ccache); +# else problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops, &ccache); +# endif if (problem) goto out; @@ -124,8 +131,13 @@ auth_krb5_password(Authctxt *authctxt, const char *password) if (problem) goto out; +# ifdef HAVE_KRB5_CC_NEW_UNIQUE + problem = krb5_cc_new_unique(authctxt->krb5_ctx, + krb5_fcc_ops.prefix, NULL, &authctxt->krb5_fwd_ccache); +# else problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &authctxt->krb5_fwd_ccache); +# endif if (problem) goto out; @@ -155,7 +167,8 @@ auth_krb5_password(Authctxt *authctxt, const char *password) if (problem) goto out; - if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, client)) { + if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, + authctxt->pw->pw_name)) { problem = -1; goto out; } @@ -190,17 +203,19 @@ auth_krb5_password(Authctxt *authctxt, const char *password) out: restore_uid(); - if (platform_client != NULL) - xfree(platform_client); + free(platform_client); if (problem) { if (ccache) krb5_cc_destroy(authctxt->krb5_ctx, ccache); - if (authctxt->krb5_ctx != NULL && problem!=-1) - debug("Kerberos password authentication failed: %s", - krb5_get_err_text(authctxt->krb5_ctx, problem)); - else + if (authctxt->krb5_ctx != NULL && problem!=-1) { + errmsg = krb5_get_error_message(authctxt->krb5_ctx, + problem); + debug("Kerberos password authentication failed: %s", + errmsg); + krb5_free_error_message(authctxt->krb5_ctx, errmsg); + } else debug("Kerberos password authentication failed: %d", problem); @@ -235,7 +250,7 @@ krb5_cleanup_proc(Authctxt *authctxt) #ifndef HEIMDAL krb5_error_code ssh_krb5_cc_gen(krb5_context ctx, krb5_ccache *ccache) { - int tmpfd, ret; + int tmpfd, ret, oerrno; char ccname[40]; mode_t old_umask; @@ -246,16 +261,18 @@ ssh_krb5_cc_gen(krb5_context ctx, krb5_ccache *ccache) { old_umask = umask(0177); tmpfd = mkstemp(ccname + strlen("FILE:")); + oerrno = errno; umask(old_umask); if (tmpfd == -1) { - logit("mkstemp(): %.100s", strerror(errno)); - return errno; + logit("mkstemp(): %.100s", strerror(oerrno)); + return oerrno; } if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) { - logit("fchmod(): %.100s", strerror(errno)); + oerrno = errno; + logit("fchmod(): %.100s", strerror(oerrno)); close(tmpfd); - return errno; + return oerrno; } close(tmpfd); diff --git a/auth-options.c b/auth-options.c index 7a39d73..6d38140 100644 --- a/auth-options.c +++ b/auth-options.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-options.c,v 1.54 2010/12/24 21:41:48 djm Exp $ */ +/* $OpenBSD: auth-options.c,v 1.68 2015/07/03 03:43:18 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -30,22 +30,22 @@ #include #include "openbsd-compat/sys-queue.h" + +#include "key.h" /* XXX for typedef */ +#include "buffer.h" /* XXX for typedef */ #include "xmalloc.h" #include "match.h" +#include "ssherr.h" #include "log.h" #include "canohost.h" -#include "buffer.h" +#include "sshbuf.h" +#include "misc.h" #include "channels.h" #include "servconf.h" -#include "misc.h" -#include "key.h" +#include "sshkey.h" #include "auth-options.h" #include "hostfile.h" #include "auth.h" -#ifdef GSSAPI -#include "ssh-gss.h" -#endif -#include "monitor_wrap.h" /* Flags set authorized_keys flags */ int no_port_forwarding_flag = 0; @@ -81,15 +81,15 @@ auth_clear_options(void) while (custom_environment) { struct envstring *ce = custom_environment; custom_environment = ce->next; - xfree(ce->s); - xfree(ce); + free(ce->s); + free(ce); } if (forced_command) { - xfree(forced_command); + free(forced_command); forced_command = NULL; } if (authorized_principals) { - xfree(authorized_principals); + free(authorized_principals); authorized_principals = NULL; } forced_tun_device = -1; @@ -158,7 +158,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) if (strncasecmp(opts, cp, strlen(cp)) == 0) { opts += strlen(cp); if (forced_command != NULL) - xfree(forced_command); + free(forced_command); forced_command = xmalloc(strlen(opts) + 1); i = 0; while (*opts) { @@ -176,7 +176,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing end quote", file, linenum); - xfree(forced_command); + free(forced_command); forced_command = NULL; goto bad_option; } @@ -189,7 +189,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) if (strncasecmp(opts, cp, strlen(cp)) == 0) { opts += strlen(cp); if (authorized_principals != NULL) - xfree(authorized_principals); + free(authorized_principals); authorized_principals = xmalloc(strlen(opts) + 1); i = 0; while (*opts) { @@ -207,7 +207,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing end quote", file, linenum); - xfree(authorized_principals); + free(authorized_principals); authorized_principals = NULL; goto bad_option; } @@ -218,8 +218,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) goto next_option; } cp = "environment=\""; - if (options.permit_user_env && - strncasecmp(opts, cp, strlen(cp)) == 0) { + if (strncasecmp(opts, cp, strlen(cp)) == 0) { char *s; struct envstring *new_envstring; @@ -241,17 +240,23 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing end quote", file, linenum); - xfree(s); + free(s); goto bad_option; } s[i] = '\0'; - auth_debug_add("Adding to environment: %.900s", s); - debug("Adding to environment: %.900s", s); opts++; - new_envstring = xmalloc(sizeof(struct envstring)); - new_envstring->s = s; - new_envstring->next = custom_environment; - custom_environment = new_envstring; + if (options.permit_user_env) { + auth_debug_add("Adding to environment: " + "%.900s", s); + debug("Adding to environment: %.900s", s); + new_envstring = xcalloc(1, + sizeof(*new_envstring)); + new_envstring->s = s; + new_envstring->next = custom_environment; + custom_environment = new_envstring; + s = NULL; + } + free(s); goto next_option; } cp = "from=\""; @@ -278,7 +283,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing end quote", file, linenum); - xfree(patterns); + free(patterns); goto bad_option; } patterns[i] = '\0'; @@ -286,7 +291,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) switch (match_host_and_ip(remote_host, remote_ip, patterns)) { case 1: - xfree(patterns); + free(patterns); /* Host name matches. */ goto next_option; case -1: @@ -296,7 +301,7 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) "invalid criteria", file, linenum); /* FALLTHROUGH */ case 0: - xfree(patterns); + free(patterns); logit("Authentication tried for %.100s with " "correct key but not from a permitted " "host (host=%.200s, ip=%.200s).", @@ -332,12 +337,13 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing " "end quote", file, linenum); - xfree(patterns); + free(patterns); goto bad_option; } patterns[i] = '\0'; opts++; p = patterns; + /* XXX - add streamlocal support */ host = hpdelim(&p); if (host == NULL || strlen(host) >= NI_MAXHOST) { debug("%.100s, line %lu: Bad permitopen " @@ -346,21 +352,21 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) auth_debug_add("%.100s, line %lu: " "Bad permitopen specification", file, linenum); - xfree(patterns); + free(patterns); goto bad_option; } host = cleanhostname(host); - if (p == NULL || (port = a2port(p)) <= 0) { + if (p == NULL || (port = permitopen_port(p)) < 0) { debug("%.100s, line %lu: Bad permitopen port " "<%.100s>", file, linenum, p ? p : ""); auth_debug_add("%.100s, line %lu: " "Bad permitopen port", file, linenum); - xfree(patterns); + free(patterns); goto bad_option; } - if (options.allow_tcp_forwarding) + if ((options.allow_tcp_forwarding & FORWARD_LOCAL) != 0) channel_add_permitted_opens(host, port); - xfree(patterns); + free(patterns); goto next_option; } cp = "tunnel=\""; @@ -379,13 +385,13 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum) file, linenum); auth_debug_add("%.100s, line %lu: missing end quote", file, linenum); - xfree(tun); + free(tun); forced_tun_device = -1; goto bad_option; } tun[i] = '\0'; forced_tun_device = a2tun(tun, NULL); - xfree(tun); + free(tun); if (forced_tun_device == SSH_TUNID_ERR) { debug("%.100s, line %lu: invalid tun device", file, linenum); @@ -429,7 +435,7 @@ bad_option: #define OPTIONS_CRITICAL 1 #define OPTIONS_EXTENSIONS 2 static int -parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, +parse_option_list(struct sshbuf *oblob, struct passwd *pw, u_int which, int crit, int *cert_no_port_forwarding_flag, int *cert_no_agent_forwarding_flag, @@ -441,30 +447,26 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, { char *command, *allowed; const char *remote_ip; - u_char *name = NULL, *data_blob = NULL; - u_int nlen, dlen, clen; - Buffer c, data; - int ret = -1, found; + char *name = NULL; + struct sshbuf *c = NULL, *data = NULL; + int r, ret = -1, result, found; - buffer_init(&data); + if ((c = sshbuf_fromb(oblob)) == NULL) { + error("%s: sshbuf_fromb failed", __func__); + goto out; + } - /* Make copy to avoid altering original */ - buffer_init(&c); - buffer_append(&c, optblob, optblob_len); - - while (buffer_len(&c) > 0) { - if ((name = buffer_get_cstring_ret(&c, &nlen)) == NULL || - (data_blob = buffer_get_string_ret(&c, &dlen)) == NULL) { - error("Certificate options corrupt"); - goto out; - } - buffer_append(&data, data_blob, dlen); - debug3("found certificate option \"%.100s\" len %u", - name, dlen); - if (strlen(name) != nlen) { - error("Certificate constraint name contains \\0"); + while (sshbuf_len(c) > 0) { + sshbuf_free(data); + data = NULL; + if ((r = sshbuf_get_cstring(c, &name, NULL)) != 0 || + (r = sshbuf_froms(c, &data)) != 0) { + error("Unable to parse certificate options: %s", + ssh_err(r)); goto out; } + debug3("found certificate option \"%.100s\" len %zu", + name, sshbuf_len(data)); found = 0; if ((which & OPTIONS_EXTENSIONS) != 0) { if (strcmp(name, "permit-X11-forwarding") == 0) { @@ -488,50 +490,41 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, } if (!found && (which & OPTIONS_CRITICAL) != 0) { if (strcmp(name, "force-command") == 0) { - if ((command = buffer_get_cstring_ret(&data, - &clen)) == NULL) { - error("Certificate constraint \"%s\" " - "corrupt", name); - goto out; - } - if (strlen(command) != clen) { - error("force-command constraint " - "contains \\0"); + if ((r = sshbuf_get_cstring(data, &command, + NULL)) != 0) { + error("Unable to parse \"%s\" " + "section: %s", name, ssh_err(r)); goto out; } if (*cert_forced_command != NULL) { error("Certificate has multiple " "force-command options"); - xfree(command); + free(command); goto out; } *cert_forced_command = command; found = 1; } if (strcmp(name, "source-address") == 0) { - if ((allowed = buffer_get_cstring_ret(&data, - &clen)) == NULL) { - error("Certificate constraint " - "\"%s\" corrupt", name); - goto out; - } - if (strlen(allowed) != clen) { - error("source-address constraint " - "contains \\0"); + if ((r = sshbuf_get_cstring(data, &allowed, + NULL)) != 0) { + error("Unable to parse \"%s\" " + "section: %s", name, ssh_err(r)); goto out; } if ((*cert_source_address_done)++) { error("Certificate has multiple " "source-address options"); - xfree(allowed); + free(allowed); goto out; } remote_ip = get_remote_ipaddr(); - switch (addr_match_cidr_list(remote_ip, - allowed)) { + result = addr_match_cidr_list(remote_ip, + allowed); + free(allowed); + switch (result) { case 1: /* accepted */ - xfree(allowed); break; case 0: /* no match */ @@ -544,12 +537,11 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, "is not permitted to use this " "certificate for login.", remote_ip); - xfree(allowed); goto out; case -1: + default: error("Certificate source-address " "contents invalid"); - xfree(allowed); goto out; } found = 1; @@ -565,15 +557,13 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, logit("Certificate extension \"%s\" " "is not supported", name); } - } else if (buffer_len(&data) != 0) { + } else if (sshbuf_len(data) != 0) { error("Certificate option \"%s\" corrupt " "(extra data)", name); goto out; } - buffer_clear(&data); - xfree(name); - xfree(data_blob); - name = data_blob = NULL; + free(name); + name = NULL; } /* successfully parsed all options */ ret = 0; @@ -582,15 +572,13 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, if (ret != 0 && cert_forced_command != NULL && *cert_forced_command != NULL) { - xfree(*cert_forced_command); + free(*cert_forced_command); *cert_forced_command = NULL; } if (name != NULL) - xfree(name); - if (data_blob != NULL) - xfree(data_blob); - buffer_free(&data); - buffer_free(&c); + free(name); + sshbuf_free(data); + sshbuf_free(c); return ret; } @@ -599,7 +587,7 @@ parse_option_list(u_char *optblob, size_t optblob_len, struct passwd *pw, * options so this must be called after auth_parse_options(). */ int -auth_cert_options(Key *k, struct passwd *pw) +auth_cert_options(struct sshkey *k, struct passwd *pw) { int cert_no_port_forwarding_flag = 1; int cert_no_agent_forwarding_flag = 1; @@ -609,38 +597,21 @@ auth_cert_options(Key *k, struct passwd *pw) char *cert_forced_command = NULL; int cert_source_address_done = 0; - if (key_cert_is_legacy(k)) { - /* All options are in the one field for v00 certs */ - if (parse_option_list(buffer_ptr(&k->cert->critical), - buffer_len(&k->cert->critical), pw, - OPTIONS_CRITICAL|OPTIONS_EXTENSIONS, 1, - &cert_no_port_forwarding_flag, - &cert_no_agent_forwarding_flag, - &cert_no_x11_forwarding_flag, - &cert_no_pty_flag, - &cert_no_user_rc, - &cert_forced_command, - &cert_source_address_done) == -1) - return -1; - } else { - /* Separate options and extensions for v01 certs */ - if (parse_option_list(buffer_ptr(&k->cert->critical), - buffer_len(&k->cert->critical), pw, - OPTIONS_CRITICAL, 1, NULL, NULL, NULL, NULL, NULL, - &cert_forced_command, - &cert_source_address_done) == -1) - return -1; - if (parse_option_list(buffer_ptr(&k->cert->extensions), - buffer_len(&k->cert->extensions), pw, - OPTIONS_EXTENSIONS, 1, - &cert_no_port_forwarding_flag, - &cert_no_agent_forwarding_flag, - &cert_no_x11_forwarding_flag, - &cert_no_pty_flag, - &cert_no_user_rc, - NULL, NULL) == -1) - return -1; - } + /* Separate options and extensions for v01 certs */ + if (parse_option_list(k->cert->critical, pw, + OPTIONS_CRITICAL, 1, NULL, NULL, NULL, NULL, NULL, + &cert_forced_command, + &cert_source_address_done) == -1) + return -1; + if (parse_option_list(k->cert->extensions, pw, + OPTIONS_EXTENSIONS, 0, + &cert_no_port_forwarding_flag, + &cert_no_agent_forwarding_flag, + &cert_no_x11_forwarding_flag, + &cert_no_pty_flag, + &cert_no_user_rc, + NULL, NULL) == -1) + return -1; no_port_forwarding_flag |= cert_no_port_forwarding_flag; no_agent_forwarding_flag |= cert_no_agent_forwarding_flag; @@ -650,8 +621,9 @@ auth_cert_options(Key *k, struct passwd *pw) /* CA-specified forced command supersedes key option */ if (cert_forced_command != NULL) { if (forced_command != NULL) - xfree(forced_command); + free(forced_command); forced_command = cert_forced_command; } return 0; } + diff --git a/auth-options.h b/auth-options.h index 7455c94..34852e5 100644 --- a/auth-options.h +++ b/auth-options.h @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-options.h,v 1.20 2010/05/07 11:30:29 djm Exp $ */ +/* $OpenBSD: auth-options.h,v 1.21 2015/01/14 10:30:34 markus Exp $ */ /* * Author: Tatu Ylonen @@ -35,6 +35,6 @@ extern char *authorized_principals; int auth_parse_options(struct passwd *, char *, char *, u_long); void auth_clear_options(void); -int auth_cert_options(Key *, struct passwd *); +int auth_cert_options(struct sshkey *, struct passwd *); #endif diff --git a/auth-pam.c b/auth-pam.c index 825478e..6055948 100644 --- a/auth-pam.c +++ b/auth-pam.c @@ -47,7 +47,6 @@ /* Based on $FreeBSD: src/crypto/openssh/auth2-pam-freebsd.c,v 1.11 2003/03/31 13:48:18 des Exp $ */ #include "includes.h" - /* * We support only client side kerberos on Windows. */ @@ -421,10 +420,9 @@ sshpam_thread_conv(int n, sshpam_const struct pam_message **msg, fail: for(i = 0; i < n; i++) { - if (reply[i].resp != NULL) - xfree(reply[i].resp); + free(reply[i].resp); } - xfree(reply); + free(reply); buffer_free(&buffer); return (PAM_CONV_ERR); } @@ -448,8 +446,10 @@ sshpam_thread(void *ctxtp) const char **ptr_pam_user = &pam_user; char *tz = getenv("TZ"); - pam_get_item(sshpam_handle, PAM_USER, + sshpam_err = pam_get_item(sshpam_handle, PAM_USER, (sshpam_const void **)ptr_pam_user); + if (sshpam_err != PAM_SUCCESS) + goto auth_fail; environ[0] = NULL; if (tz != NULL) @@ -595,10 +595,9 @@ sshpam_store_conv(int n, sshpam_const struct pam_message **msg, fail: for(i = 0; i < n; i++) { - if (reply[i].resp != NULL) - xfree(reply[i].resp); + free(reply[i].resp); } - xfree(reply); + free(reply); return (PAM_CONV_ERR); } @@ -702,7 +701,7 @@ sshpam_init_ctx(Authctxt *authctxt) /* Start the authentication thread */ if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, socks) == -1) { error("PAM: failed create sockets: %s", strerror(errno)); - xfree(ctxt); + free(ctxt); return (NULL); } ctxt->pam_psock = socks[0]; @@ -712,7 +711,7 @@ sshpam_init_ctx(Authctxt *authctxt) strerror(errno)); close(socks[0]); close(socks[1]); - xfree(ctxt); + free(ctxt); return (NULL); } cleanup_ctxt = ctxt; @@ -747,22 +746,22 @@ sshpam_query(void *ctx, char **name, char **info, case PAM_PROMPT_ECHO_OFF: *num = 1; len = plen + mlen + 1; - **prompts = xrealloc(**prompts, 1, len); + **prompts = xreallocarray(**prompts, 1, len); strlcpy(**prompts + plen, msg, len - plen); plen += mlen; **echo_on = (type == PAM_PROMPT_ECHO_ON); - xfree(msg); + free(msg); return (0); case PAM_ERROR_MSG: case PAM_TEXT_INFO: /* accumulate messages */ len = plen + mlen + 2; - **prompts = xrealloc(**prompts, 1, len); + **prompts = xreallocarray(**prompts, 1, len); strlcpy(**prompts + plen, msg, len - plen); plen += mlen; strlcat(**prompts + plen, "\n", len - plen); plen++; - xfree(msg); + free(msg); break; case PAM_ACCT_EXPIRED: sshpam_account_status = 0; @@ -775,7 +774,7 @@ sshpam_query(void *ctx, char **name, char **info, *num = 0; **echo_on = 0; ctxt->pam_done = -1; - xfree(msg); + free(msg); return 0; } /* FALLTHROUGH */ @@ -785,7 +784,7 @@ sshpam_query(void *ctx, char **name, char **info, debug("PAM: %s", **prompts); buffer_append(&loginmsg, **prompts, strlen(**prompts)); - xfree(**prompts); + free(**prompts); **prompts = NULL; } if (type == PAM_SUCCESS) { @@ -799,7 +798,7 @@ sshpam_query(void *ctx, char **name, char **info, *num = 0; **echo_on = 0; ctxt->pam_done = 1; - xfree(msg); + free(msg); return (0); } error("PAM: %s for %s%.100s from %.100s", msg, @@ -810,7 +809,7 @@ sshpam_query(void *ctx, char **name, char **info, default: *num = 0; **echo_on = 0; - xfree(msg); + free(msg); ctxt->pam_done = -1; return (-1); } @@ -861,7 +860,7 @@ sshpam_free_ctx(void *ctxtp) debug3("PAM: %s entering", __func__); sshpam_thread_cleanup(); - xfree(ctxt); + free(ctxt); /* * We don't call sshpam_cleanup() here because we may need the PAM * handle at a later stage, e.g. when setting up a session. It's @@ -1015,10 +1014,9 @@ sshpam_tty_conv(int n, sshpam_const struct pam_message **msg, fail: for(i = 0; i < n; i++) { - if (reply[i].resp != NULL) - xfree(reply[i].resp); + free(reply[i].resp); } - xfree(reply); + free(reply); return (PAM_CONV_ERR); } @@ -1090,7 +1088,7 @@ do_pam_putenv(char *name, char *value) snprintf(compound, len, "%s=%s", name, value); ret = pam_putenv(sshpam_handle, compound); - xfree(compound); + free(compound); #endif return (ret); @@ -1117,8 +1115,8 @@ free_pam_environment(char **env) return; for (envp = env; *envp; envp++) - xfree(*envp); - xfree(env); + free(*envp); + free(env); } /* @@ -1174,10 +1172,9 @@ sshpam_passwd_conv(int n, sshpam_const struct pam_message **msg, fail: for(i = 0; i < n; i++) { - if (reply[i].resp != NULL) - xfree(reply[i].resp); + free(reply[i].resp); } - xfree(reply); + free(reply); return (PAM_CONV_ERR); } diff --git a/auth-passwd.c b/auth-passwd.c index a9cf9a6..81e1f99 100644 --- a/auth-passwd.c +++ b/auth-passwd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-passwd.c,v 1.43 2007/09/21 08:15:29 djm Exp $ */ +/* $OpenBSD: auth-passwd.c,v 1.44 2014/07/15 15:54:14 millert Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -37,6 +37,7 @@ */ #include "includes.h" + #include "xmalloc.h" /* @@ -58,6 +59,7 @@ #include "packet.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "key.h" #include "hostfile.h" @@ -197,6 +199,7 @@ sys_auth_passwd(Authctxt *authctxt, const char *password) return (auth_close(as)); } } + #elif defined(WIN32_FIXME) int sys_auth_passwd(Authctxt *authctxt, const char *password) { @@ -247,7 +250,7 @@ int sys_auth_passwd(Authctxt *authctxt, const char *password) if (0 == MultiByteToWideChar(CP_UTF8, 0, authctxt -> user, -1, user_UTF16, buffer_size)) { - xfree(user_UTF16); + free(user_UTF16); return 0; } @@ -270,7 +273,7 @@ int sys_auth_passwd(Authctxt *authctxt, const char *password) if (0 == MultiByteToWideChar(CP_UTF8, 0, password, -1, password_UTF16 , buffer_size)) { - xfree(password_UTF16 ); + free(password_UTF16 ); return 0; } @@ -308,8 +311,8 @@ int sys_auth_passwd(Authctxt *authctxt, const char *password) } } - xfree(user_UTF16); - xfree(password_UTF16); + free(user_UTF16); + free(password_UTF16); /* * If login still fails, go out. @@ -369,6 +372,7 @@ sys_auth_passwd(Authctxt *authctxt, const char *password) * Authentication is accepted if the encrypted passwords * are identical. */ - return (strcmp(encrypted_password, pw_password) == 0); + return encrypted_password != NULL && + strcmp(encrypted_password, pw_password) == 0; } #endif diff --git a/auth-rh-rsa.c b/auth-rh-rsa.c index 25a0738..a4ccb73 100644 --- a/auth-rh-rsa.c +++ b/auth-rh-rsa.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-rh-rsa.c,v 1.43 2010/03/04 10:36:03 djm Exp $ */ +/* $OpenBSD: auth-rh-rsa.c,v 1.44 2014/07/15 15:54:14 millert Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -15,15 +15,13 @@ #include "includes.h" -/* - * We support only client side kerberos on Windows. - */ - #ifdef WIN32_FIXME #undef GSSAPI #undef KRB5 #endif +#ifdef WITH_SSH1 + #include #include @@ -33,6 +31,7 @@ #include "uidswap.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "key.h" #include "hostfile.h" @@ -110,3 +109,5 @@ auth_rhosts_rsa(Authctxt *authctxt, char *cuser, Key *client_host_key) packet_send_debug("Rhosts with RSA host authentication accepted."); return 1; } + +#endif /* WITH_SSH1 */ diff --git a/auth-rhosts.c b/auth-rhosts.c index 35d221a..d00478b 100644 --- a/auth-rhosts.c +++ b/auth-rhosts.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-rhosts.c,v 1.44 2010/03/07 11:57:13 dtucker Exp $ */ +/* $OpenBSD: auth-rhosts.c,v 1.46 2014/12/23 22:42:48 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -43,12 +43,12 @@ #include "uidswap.h" #include "pathnames.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "canohost.h" #include "key.h" #include "hostfile.h" #include "auth.h" -#include "misc.h" /* import */ extern ServerOptions options; @@ -67,7 +67,8 @@ check_rhosts_file(const char *filename, const char *hostname, { #ifndef WIN32_FIXME FILE *f; - char buf[1024]; /* Must not be larger than host, user, dummy below. */ +#define RBUFLN 1024 + char buf[RBUFLN];/* Must not be larger than host, user, dummy below. */ int fd; struct stat st; @@ -90,8 +91,9 @@ check_rhosts_file(const char *filename, const char *hostname, return 0; } while (fgets(buf, sizeof(buf), f)) { - /* All three must be at least as big as buf to avoid overflows. */ - char hostbuf[1024], userbuf[1024], dummy[1024], *host, *user, *cp; + /* All three must have length >= buf to avoid overflows. */ + char hostbuf[RBUFLN], userbuf[RBUFLN], dummy[RBUFLN]; + char *host, *user, *cp; int negated; for (cp = buf; *cp == ' ' || *cp == '\t'; cp++) @@ -150,8 +152,8 @@ check_rhosts_file(const char *filename, const char *hostname, /* Check for empty host/user names (particularly '+'). */ if (!host[0] || !user[0]) { /* We come here if either was '+' or '-'. */ - auth_debug_add("Ignoring wild host/user names in %.100s.", - filename); + auth_debug_add("Ignoring wild host/user names " + "in %.100s.", filename); continue; } /* Verify that host name matches. */ @@ -159,7 +161,8 @@ check_rhosts_file(const char *filename, const char *hostname, if (!innetgr(host + 1, hostname, NULL, NULL) && !innetgr(host + 1, ipaddr, NULL, NULL)) continue; - } else if (strcasecmp(host, hostname) && strcmp(host, ipaddr) != 0) + } else if (strcasecmp(host, hostname) && + strcmp(host, ipaddr) != 0) continue; /* Different hostname. */ /* Verify that user name matches. */ @@ -185,6 +188,7 @@ check_rhosts_file(const char *filename, const char *hostname, /* Authentication using this file denied. */ fclose(f); return 0; + #else return 1; #endif @@ -221,7 +225,8 @@ auth_rhosts2_raw(struct passwd *pw, const char *client_user, const char *hostnam /* Switch to the user's uid. */ temporarily_use_uid(pw); /* - * Quick check: if the user has no .shosts or .rhosts files, return + * Quick check: if the user has no .shosts or .rhosts files and + * no system hosts.equiv/shosts.equiv files exist then return * failure immediately without doing costly lookups from name * servers. */ @@ -236,27 +241,38 @@ auth_rhosts2_raw(struct passwd *pw, const char *client_user, const char *hostnam /* Switch back to privileged uid. */ restore_uid(); - /* Deny if The user has no .shosts or .rhosts file and there are no system-wide files. */ + /* + * Deny if The user has no .shosts or .rhosts file and there + * are no system-wide files. + */ if (!rhosts_files[rhosts_file_index] && stat(_PATH_RHOSTS_EQUIV, &st) < 0 && - stat(_PATH_SSH_HOSTS_EQUIV, &st) < 0) + stat(_PATH_SSH_HOSTS_EQUIV, &st) < 0) { + debug3("%s: no hosts access files exist", __func__); return 0; + } - /* If not logging in as superuser, try /etc/hosts.equiv and shosts.equiv. */ - if (pw->pw_uid != 0) { + /* + * If not logging in as superuser, try /etc/hosts.equiv and + * shosts.equiv. + */ + if (pw->pw_uid == 0) + debug3("%s: root user, ignoring system hosts files", __func__); + else { if (check_rhosts_file(_PATH_RHOSTS_EQUIV, hostname, ipaddr, client_user, pw->pw_name)) { - auth_debug_add("Accepted for %.100s [%.100s] by /etc/hosts.equiv.", - hostname, ipaddr); + auth_debug_add("Accepted for %.100s [%.100s] by " + "/etc/hosts.equiv.", hostname, ipaddr); return 1; } if (check_rhosts_file(_PATH_SSH_HOSTS_EQUIV, hostname, ipaddr, client_user, pw->pw_name)) { - auth_debug_add("Accepted for %.100s [%.100s] by %.100s.", - hostname, ipaddr, _PATH_SSH_HOSTS_EQUIV); + auth_debug_add("Accepted for %.100s [%.100s] by " + "%.100s.", hostname, ipaddr, _PATH_SSH_HOSTS_EQUIV); return 1; } } + /* * Check that the home directory is owned by root or the user, and is * not group or world writable. @@ -303,20 +319,25 @@ auth_rhosts2_raw(struct passwd *pw, const char *client_user, const char *hostnam auth_debug_add("Bad file modes for %.200s", buf); continue; } - /* Check if we have been configured to ignore .rhosts and .shosts files. */ + /* + * Check if we have been configured to ignore .rhosts + * and .shosts files. + */ if (options.ignore_rhosts) { - auth_debug_add("Server has been configured to ignore %.100s.", - rhosts_files[rhosts_file_index]); + auth_debug_add("Server has been configured to " + "ignore %.100s.", rhosts_files[rhosts_file_index]); continue; } /* Check if authentication is permitted by the file. */ - if (check_rhosts_file(buf, hostname, ipaddr, client_user, pw->pw_name)) { + if (check_rhosts_file(buf, hostname, ipaddr, + client_user, pw->pw_name)) { auth_debug_add("Accepted by %.100s.", rhosts_files[rhosts_file_index]); /* Restore the privileged uid. */ restore_uid(); - auth_debug_add("Accepted host %s ip %s client_user %s server_user %s", - hostname, ipaddr, client_user, pw->pw_name); + auth_debug_add("Accepted host %s ip %s client_user " + "%s server_user %s", hostname, ipaddr, + client_user, pw->pw_name); return 1; } } diff --git a/auth-rsa.c b/auth-rsa.c index 63b3a01..3812438 100644 --- a/auth-rsa.c +++ b/auth-rsa.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth-rsa.c,v 1.80 2011/05/23 03:30:07 djm Exp $ */ +/* $OpenBSD: auth-rsa.c,v 1.90 2015/01/28 22:36:00 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -25,11 +25,12 @@ #undef KRB5 #endif +#ifdef WITH_SSH1 + #include #include #include -#include #include #include @@ -45,6 +46,7 @@ #include "buffer.h" #include "pathnames.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "key.h" #include "auth-options.h" @@ -55,7 +57,8 @@ #endif #include "monitor_wrap.h" #include "ssh.h" -#include "misc.h" + +#include "digest.h" /* import */ extern ServerOptions options; @@ -100,12 +103,13 @@ int auth_rsa_verify_response(Key *key, BIGNUM *challenge, u_char response[16]) { u_char buf[32], mdbuf[16]; - MD5_CTX md; + struct ssh_digest_ctx *md; int len; /* don't allow short keys */ if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) { - error("auth_rsa_verify_response: RSA modulus too small: %d < minimum %d bits", + error("%s: RSA modulus too small: %d < minimum %d bits", + __func__, BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE); return (0); } @@ -113,13 +117,15 @@ auth_rsa_verify_response(Key *key, BIGNUM *challenge, u_char response[16]) /* The response is MD5 of decrypted challenge plus session id. */ len = BN_num_bytes(challenge); if (len <= 0 || len > 32) - fatal("auth_rsa_verify_response: bad challenge length %d", len); + fatal("%s: bad challenge length %d", __func__, len); memset(buf, 0, 32); BN_bn2bin(challenge, buf + 32 - len); - MD5_Init(&md); - MD5_Update(&md, buf, 32); - MD5_Update(&md, session_id, 16); - MD5_Final(mdbuf, &md); + if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL || + ssh_digest_update(md, buf, 32) < 0 || + ssh_digest_update(md, session_id, 16) < 0 || + ssh_digest_final(md, mdbuf, sizeof(mdbuf)) < 0) + fatal("%s: md5 failed", __func__); + ssh_digest_free(md); /* Verify that the response is the original challenge. */ if (timingsafe_bcmp(response, mdbuf, 16) != 0) { @@ -149,7 +155,8 @@ auth_rsa_challenge_dialog(Key *key) challenge = PRIVSEP(auth_rsa_generate_challenge(key)); /* Encrypt the challenge with the public key. */ - rsa_public_encrypt(encrypted_challenge, challenge, key->rsa); + if (rsa_public_encrypt(encrypted_challenge, challenge, key->rsa) != 0) + fatal("%s: rsa_public_encrypt failed", __func__); /* Send the encrypted challenge to the client. */ packet_start(SSH_SMSG_AUTH_RSA_CHALLENGE); @@ -173,9 +180,8 @@ static int rsa_key_allowed_in_file(struct passwd *pw, char *file, const BIGNUM *client_n, Key **rkey) { - char line[SSH_MAX_PUBKEY_BYTES]; - int allowed = 0; - u_int bits; + char *fp, line[SSH_MAX_PUBKEY_BYTES]; + int allowed = 0, bits; FILE *f; u_long linenum = 0; Key *key; @@ -236,11 +242,18 @@ rsa_key_allowed_in_file(struct passwd *pw, char *file, /* check the real bits */ keybits = BN_num_bits(key->rsa->n); - if (keybits < 0 || bits != (u_int)keybits) + if (keybits < 0 || bits != keybits) logit("Warning: %s, line %lu: keysize mismatch: " "actual %d vs. announced %d.", file, linenum, BN_num_bits(key->rsa->n), bits); + if ((fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) + continue; + debug("matching key found: file %s, line %lu %s %s", + file, linenum, key_type(key), fp); + free(fp); + /* Never accept a revoked key */ if (auth_key_is_revoked(key)) break; @@ -285,10 +298,12 @@ auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) temporarily_use_uid(pw); for (i = 0; !allowed && i < options.num_authkeys_files; i++) { + if (strcasecmp(options.authorized_keys_files[i], "none") == 0) + continue; file = expand_authorized_keys( options.authorized_keys_files[i], pw); allowed = rsa_key_allowed_in_file(pw, file, client_n, rkey); - xfree(file); + free(file); } restore_uid(); @@ -305,7 +320,6 @@ int auth_rsa(Authctxt *authctxt, BIGNUM *client_n) { Key *key; - char *fp; struct passwd *pw = authctxt->pw; /* no user given */ @@ -335,12 +349,10 @@ auth_rsa(Authctxt *authctxt, BIGNUM *client_n) * options; this will be reset if the options cause the * authentication to be rejected. */ - fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); - verbose("Found matching %s key: %s", - key_type(key), fp); - xfree(fp); - key_free(key); + pubkey_auth_info(authctxt, key, NULL); packet_send_debug("RSA authentication accepted."); return (1); } + +#endif /* WITH_SSH1 */ diff --git a/auth.c b/auth.c index 7b6195d..30bbc1e 100644 --- a/auth.c +++ b/auth.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth.c,v 1.94 2011/05/23 03:33:38 djm Exp $ */ +/* $OpenBSD: auth.c,v 1.113 2015/08/21 03:42:19 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -36,7 +36,6 @@ #include #include -#include #include @@ -59,12 +58,14 @@ #include #include #include +#include #include "xmalloc.h" #include "match.h" #include "groupaccess.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "key.h" #include "hostfile.h" @@ -72,7 +73,6 @@ #include "auth-options.h" #include "canohost.h" #include "uidswap.h" -#include "misc.h" #include "packet.h" #include "loginrec.h" #ifdef GSSAPI @@ -80,6 +80,9 @@ #endif #include "authfile.h" #include "monitor_wrap.h" +#include "authfile.h" +#include "ssherr.h" +#include "compat.h" /* import */ extern ServerOptions options; @@ -173,7 +176,7 @@ allowed_user(struct passwd * pw) if (stat(shell, &st) != 0) { logit("User %.100s not allowed because shell %.100s " "does not exist", pw->pw_name, shell); - xfree(shell); + free(shell); return 0; } #ifndef WIN32_FIXME @@ -181,11 +184,11 @@ allowed_user(struct passwd * pw) (st.st_mode & (S_IXOTH|S_IXUSR|S_IXGRP)) == 0) { logit("User %.100s not allowed because shell %.100s " "is not executable", pw->pw_name, shell); - xfree(shell); + free(shell); return 0; } #endif - xfree(shell); + free(shell); } if (options.num_deny_users > 0 || options.num_allow_users > 0 || @@ -262,7 +265,25 @@ allowed_user(struct passwd * pw) } void -auth_log(Authctxt *authctxt, int authenticated, char *method, char *info) +auth_info(Authctxt *authctxt, const char *fmt, ...) +{ + va_list ap; + int i; + + free(authctxt->info); + authctxt->info = NULL; + + va_start(ap, fmt); + i = vasprintf(&authctxt->info, fmt, ap); + va_end(ap); + + if (i < 0 || authctxt->info == NULL) + fatal("vasprintf failed"); +} + +void +auth_log(Authctxt *authctxt, int authenticated, int partial, + const char *method, const char *submethod) { void (*authlog) (const char *fmt,...) = verbose; char *authmsg; @@ -279,17 +300,24 @@ auth_log(Authctxt *authctxt, int authenticated, char *method, char *info) if (authctxt->postponed) authmsg = "Postponed"; + else if (partial) + authmsg = "Partial"; else authmsg = authenticated ? "Accepted" : "Failed"; - authlog("%s %s for %s%.100s from %.200s port %d%s", + authlog("%s %s%s%s for %s%.100s from %.200s port %d %s%s%s", authmsg, method, + submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod, authctxt->valid ? "" : "invalid user ", authctxt->user, get_remote_ipaddr(), get_remote_port(), - info); + compat20 ? "ssh2" : "ssh1", + authctxt->info != NULL ? ": " : "", + authctxt->info != NULL ? authctxt->info : ""); + free(authctxt->info); + authctxt->info = NULL; #ifdef CUSTOM_FAILED_LOGIN if (authenticated == 0 && !authctxt->postponed && @@ -310,17 +338,34 @@ auth_log(Authctxt *authctxt, int authenticated, char *method, char *info) #endif } + +void +auth_maxtries_exceeded(Authctxt *authctxt) +{ + error("maximum authentication attempts exceeded for " + "%s%.100s from %.200s port %d %s", + authctxt->valid ? "" : "invalid user ", + authctxt->user, + get_remote_ipaddr(), + get_remote_port(), + compat20 ? "ssh2" : "ssh1"); + packet_disconnect("Too many authentication failures"); + /* NOTREACHED */ +} + /* * Check whether root logins are disallowed. */ int -auth_root_allowed(char *method) +auth_root_allowed(const char *method) { switch (options.permit_root_login) { case PERMIT_YES: return 1; case PERMIT_NO_PASSWD: - if (strcmp(method, "password") != 0) + if (strcmp(method, "publickey") == 0 || + strcmp(method, "hostbased") == 0 || + strcmp(method, "gssapi-with-mic") == 0) return 1; break; case PERMIT_FORCED_ONLY: @@ -342,7 +387,7 @@ auth_root_allowed(char *method) * * This returns a buffer allocated by xmalloc. */ - + /* * Win32 implementation uses UTF16 names. */ @@ -408,7 +453,7 @@ wchar_t *expand_authorized_keys(const wchar_t *filename, struct passwd *pw) fatal("expand_authorized_keys: path too long"); } - xfree(file_w); + free(file_w); return (_wcsdup(ret)); } @@ -418,7 +463,7 @@ wchar_t *expand_authorized_keys(const wchar_t *filename, struct passwd *pw) char * expand_authorized_keys(const char *filename, struct passwd *pw) { - char *file, ret[MAXPATHLEN]; + char *file, ret[PATH_MAX]; int i; file = percent_expand(filename, "h", pw->pw_dir, @@ -428,14 +473,13 @@ expand_authorized_keys(const char *filename, struct passwd *pw) * Ensure that filename starts anchored. If not, be backward * compatible and prepend the '%h/' */ - if (*file == '/') return (file); i = snprintf(ret, sizeof(ret), "%s/%s", pw->pw_dir, file); if (i < 0 || (size_t)i >= sizeof(ret)) fatal("expand_authorized_keys: path too long"); - xfree(file); + free(file); return (xstrdup(ret)); } #endif /* WIN32_FIXME */ @@ -477,7 +521,7 @@ check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host, load_hostkeys(hostkeys, host, user_hostfile); restore_uid(); } - xfree(user_hostfile); + free(user_hostfile); } host_status = check_key_in_hostkeys(hostkeys, key, &found); if (host_status == HOST_REVOKED) @@ -494,42 +538,43 @@ check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host, return host_status; } - /* - * Check a given file for security. This is defined as all components + * Check a given path for security. This is defined as all components * of the path to the file must be owned by either the owner of * of the file or root and no directories must be group or world writable. * * XXX Should any specific check be done for sym links ? * - * Takes an open file descriptor, the file name, a uid and and + * Takes a file name, its stat information (preferably from fstat() to + * avoid races), the uid of the expected owner, their home directory and an * error buffer plus max size as arguments. * * Returns 0 on success and -1 on failure */ -static int -secure_filename(FILE *f, const char *file, struct passwd *pw, - char *err, size_t errlen) +int +auth_secure_path(const char *name, struct stat *stp, const char *pw_dir, + uid_t uid, char *err, size_t errlen) { #ifndef WIN32_FIXME - uid_t uid = pw->pw_uid; - char buf[MAXPATHLEN], homedir[MAXPATHLEN]; + char buf[PATH_MAX], homedir[PATH_MAX]; char *cp; int comparehome = 0; struct stat st; - if (realpath(file, buf) == NULL) { - snprintf(err, errlen, "realpath %s failed: %s", file, + if (realpath(name, buf) == NULL) { + snprintf(err, errlen, "realpath %s failed: %s", name, strerror(errno)); return -1; } - if (realpath(pw->pw_dir, homedir) != NULL) + if (pw_dir != NULL && realpath(pw_dir, homedir) != NULL) comparehome = 1; - /* check the open file to avoid races */ - if (fstat(fileno(f), &st) < 0 || - (st.st_uid != 0 && st.st_uid != uid) || - (st.st_mode & 022) != 0) { + if (!S_ISREG(stp->st_mode)) { + snprintf(err, errlen, "%s is not a regular file", buf); + return -1; + } + if ((!platform_sys_dir_uid(stp->st_uid) && stp->st_uid != uid) || + (stp->st_mode & 022) != 0) { snprintf(err, errlen, "bad ownership or modes for file %s", buf); return -1; @@ -544,7 +589,7 @@ secure_filename(FILE *f, const char *file, struct passwd *pw, strlcpy(buf, cp, sizeof(buf)); if (stat(buf, &st) < 0 || - (st.st_uid != 0 && st.st_uid != uid) || + (!platform_sys_dir_uid(st.st_uid) && st.st_uid != uid) || (st.st_mode & 022) != 0) { snprintf(err, errlen, "bad ownership or modes for directory %s", buf); @@ -565,7 +610,32 @@ secure_filename(FILE *f, const char *file, struct passwd *pw, return 0; #else return 0; -#endif +#endif +} + +/* + * Version of secure_path() that accepts an open file descriptor to + * avoid races. + * + * Returns 0 on success and -1 on failure + */ +static int +secure_filename(FILE *f, const char *file, struct passwd *pw, + char *err, size_t errlen) +{ +#ifndef WIN32_FIXME + struct stat st; + + /* check the open file to avoid races */ + if (fstat(fileno(f), &st) < 0) { + snprintf(err, errlen, "cannot stat file %s: %s", + file, strerror(errno)); + return -1; + } + return auth_secure_path(file, &st, pw->pw_dir, pw->pw_uid, err, errlen); +#else + return 0; +#endif } static FILE * @@ -576,7 +646,7 @@ auth_openfile(const char *file, struct passwd *pw, int strict_modes, struct stat st; int fd; FILE *f; - + #ifdef WIN32_FIXME if ((fd = WSHELPwopen(file, O_RDONLY|O_NONBLOCK)) == -1) { #else @@ -598,11 +668,9 @@ auth_openfile(const char *file, struct passwd *pw, int strict_modes, close(fd); return NULL; } - #ifndef WIN32_FIXME unset_nonblock(fd); #endif - if ((f = fdopen(fd, "r")) == NULL) { close(fd); return NULL; @@ -642,9 +710,10 @@ getpwnamallow(const char *user) #endif #endif struct passwd *pw; + struct connection_info *ci = get_connection_info(1, options.use_dns); - parse_server_match_config(&options, user, - get_canonical_hostname(options.use_dns), get_remote_ipaddr()); + ci->user = user; + parse_server_match_config(&options, ci); #if defined(_AIX) && defined(HAVE_SETAUTHDB) aix_setauthdb(user); @@ -706,29 +775,39 @@ getpwnamallow(const char *user) int auth_key_is_revoked(Key *key) { - char *key_fp; + char *fp = NULL; + int r; if (options.revoked_keys_file == NULL) return 0; - - switch (key_in_file(key, options.revoked_keys_file, 0)) { - case 0: - /* key not revoked */ - return 0; - case -1: - /* Error opening revoked_keys_file: refuse all keys */ - error("Revoked keys file is unreadable: refusing public key " - "authentication"); - return 1; - case 1: - /* Key revoked */ - key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); - error("WARNING: authentication attempt with a revoked " - "%s key %s ", key_type(key), key_fp); - xfree(key_fp); - return 1; + if ((fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + error("%s: fingerprint key: %s", __func__, ssh_err(r)); + goto out; } - fatal("key_in_file returned junk"); + + r = sshkey_check_revoked(key, options.revoked_keys_file); + switch (r) { + case 0: + break; /* not revoked */ + case SSH_ERR_KEY_REVOKED: + error("Authentication key %s %s revoked by file %s", + sshkey_type(key), fp, options.revoked_keys_file); + goto out; + default: + error("Error checking authentication key %s %s in " + "revoked keys file %s: %s", sshkey_type(key), fp, + options.revoked_keys_file, ssh_err(r)); + goto out; + } + + /* Success */ + r = 0; + + out: + free(fp); + return r == 0 ? 0 : 1; } void @@ -756,7 +835,7 @@ auth_debug_send(void) while (buffer_len(&auth_debug)) { msg = buffer_get_string(&auth_debug, NULL); packet_send_debug("%s", msg); - xfree(msg); + free(msg); } } @@ -780,10 +859,12 @@ fakepw(void) fake.pw_name = "NOUSER"; fake.pw_passwd = "$2a$06$r3.juUaHZDlIbQaO2dS9FuYxL1W9M81R1Tc92PoSNmzvpEqLkLGrK"; +#ifdef HAVE_STRUCT_PASSWD_PW_GECOS fake.pw_gecos = "NOUSER"; +#endif fake.pw_uid = privsep_pw == NULL ? (uid_t)-1 : privsep_pw->pw_uid; fake.pw_gid = privsep_pw == NULL ? (gid_t)-1 : privsep_pw->pw_gid; -#ifdef HAVE_PW_CLASS_IN_PASSWD +#ifdef HAVE_STRUCT_PASSWD_PW_CLASS fake.pw_class = ""; #endif fake.pw_dir = "/nonexist"; diff --git a/auth.h b/auth.h index 9883bd9..fa9a069 100644 --- a/auth.h +++ b/auth.h @@ -1,4 +1,4 @@ -/* $OpenBSD: auth.h,v 1.69 2011/05/23 03:30:07 djm Exp $ */ +/* $OpenBSD: auth.h,v 1.84 2015/05/08 06:41:56 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. @@ -48,6 +48,9 @@ #endif +struct ssh; +struct sshkey; + typedef struct Authctxt Authctxt; typedef struct Authmethod Authmethod; typedef struct KbdintDevice KbdintDevice; @@ -59,17 +62,19 @@ struct Authctxt { int valid; /* user exists and is allowed to login */ int attempt; int failures; - int server_caused_failure; + int server_caused_failure; int force_pwchange; char *user; /* username sent by the client */ char *service; struct passwd *pw; /* set if 'valid' */ char *style; void *kbdintctxt; - void *jpake_ctx; + char *info; /* Extra info for next auth_log */ #ifdef BSD_AUTH auth_session_t *as; #endif + char **auth_methods; /* modified from server config */ + u_int num_auth_methods; #ifdef KRB5 krb5_context krb5_ctx; krb5_ccache krb5_fwd_ccache; @@ -80,6 +85,8 @@ struct Authctxt { Buffer *loginmsg; void *methoddata; + struct sshkey **prev_userkeys; + u_int nprev_userkeys; #ifdef WIN32_FIXME HANDLE hTokenLsa_; @@ -131,7 +138,15 @@ int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **); int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *); int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); -int user_key_allowed(struct passwd *, Key *); +int user_key_allowed(struct passwd *, Key *, int); +void pubkey_auth_info(Authctxt *, const Key *, const char *, ...) + __attribute__((__format__ (printf, 3, 4))); +void auth2_record_userkey(Authctxt *, struct sshkey *); +int auth2_userkey_already_used(Authctxt *, struct sshkey *); + +struct stat; +int auth_secure_path(const char *, struct stat *, const char *, uid_t, + char *, size_t); #ifdef KRB5 int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *); @@ -155,12 +170,21 @@ void disable_forwarding(void); void do_authentication(Authctxt *); void do_authentication2(Authctxt *); -void auth_log(Authctxt *, int, char *, char *); -void userauth_finish(Authctxt *, int, char *); +void auth_info(Authctxt *authctxt, const char *, ...) + __attribute__((__format__ (printf, 2, 3))) + __attribute__((__nonnull__ (2))); +void auth_log(Authctxt *, int, int, const char *, const char *); +void auth_maxtries_exceeded(Authctxt *) __attribute__((noreturn)); +void userauth_finish(Authctxt *, int, const char *, const char *); +int auth_root_allowed(const char *); + void userauth_send_banner(const char *); -int auth_root_allowed(char *); char *auth2_read_banner(void); +int auth2_methods_valid(const char *, int); +int auth2_update_methods_lists(Authctxt *, const char *, const char *); +int auth2_setup_methods_lists(Authctxt *); +int auth2_method_allowed(Authctxt *, const char *, const char *); void privsep_challenge_enable(void); @@ -171,20 +195,19 @@ int bsdauth_respond(void *, u_int, char **); int skey_query(void *, char **, char **, u_int *, char ***, u_int **); int skey_respond(void *, u_int, char **); -void auth2_jpake_get_pwdata(Authctxt *, BIGNUM **, char **, char **); -void auth2_jpake_stop(Authctxt *); - int allowed_user(struct passwd *); struct passwd * getpwnamallow(const char *user); char *get_challenge(Authctxt *); int verify_response(Authctxt *, const char *); void abandon_challenge_response(Authctxt *); + #ifndef WIN32_FIXME char *expand_authorized_keys(const char *, struct passwd *pw); #else wchar_t *expand_authorized_keys(const wchar_t *filename, struct passwd *pw); #endif + char *authorized_principals_file(struct passwd *); FILE *auth_openkeyfile(const char *, struct passwd *, int); @@ -197,10 +220,13 @@ check_key_in_hostfiles(struct passwd *, Key *, const char *, /* hostkey handling */ Key *get_hostkey_by_index(int); -Key *get_hostkey_public_by_type(int); -Key *get_hostkey_private_by_type(int); -int get_hostkey_index(Key *); +Key *get_hostkey_public_by_index(int, struct ssh *); +Key *get_hostkey_public_by_type(int, int, struct ssh *); +Key *get_hostkey_private_by_type(int, int, struct ssh *); +int get_hostkey_index(Key *, int, struct ssh *); int ssh1_session_key(BIGNUM *); +int sshd_hostkey_sign(Key *, Key *, u_char **, size_t *, + const u_char *, size_t, u_int); /* debug messages during authentication */ void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2))); @@ -211,8 +237,6 @@ struct passwd *fakepw(void); int sys_auth_passwd(Authctxt *, const char *); -#define AUTH_FAIL_MSG "Too many authentication failures for %.100s" - #define SKEY_PROMPT "\nS/Key Password: " #if defined(KRB5) && !defined(HEIMDAL) diff --git a/auth1.c b/auth1.c index 039383b..83d0464 100644 --- a/auth1.c +++ b/auth1.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth1.c,v 1.75 2010/08/31 09:58:37 djm Exp $ */ +/* $OpenBSD: auth1.c,v 1.82 2014/07/15 15:54:14 millert Exp $ */ /* * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland * All rights reserved @@ -21,6 +21,9 @@ #undef KRB5 #endif + +#ifdef WITH_SSH1 + #include #include @@ -36,6 +39,7 @@ #include "packet.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "key.h" @@ -54,11 +58,11 @@ extern ServerOptions options; extern Buffer loginmsg; -static int auth1_process_password(Authctxt *, char *, size_t); -static int auth1_process_rsa(Authctxt *, char *, size_t); -static int auth1_process_rhosts_rsa(Authctxt *, char *, size_t); -static int auth1_process_tis_challenge(Authctxt *, char *, size_t); -static int auth1_process_tis_response(Authctxt *, char *, size_t); +static int auth1_process_password(Authctxt *); +static int auth1_process_rsa(Authctxt *); +static int auth1_process_rhosts_rsa(Authctxt *); +static int auth1_process_tis_challenge(Authctxt *); +static int auth1_process_tis_response(Authctxt *); static char *client_user = NULL; /* Used to fill in remote user for PAM */ @@ -66,7 +70,7 @@ struct AuthMethod1 { int type; char *name; int *enabled; - int (*method)(Authctxt *, char *, size_t); + int (*method)(Authctxt *); }; const struct AuthMethod1 auth1_methods[] = { @@ -121,7 +125,7 @@ get_authname(int type) /*ARGSUSED*/ static int -auth1_process_password(Authctxt *authctxt, char *info, size_t infolen) +auth1_process_password(Authctxt *authctxt) { int authenticated = 0; char *password; @@ -138,15 +142,15 @@ auth1_process_password(Authctxt *authctxt, char *info, size_t infolen) /* Try authentication with the password. */ authenticated = PRIVSEP(auth_password(authctxt, password)); - memset(password, 0, dlen); - xfree(password); + explicit_bzero(password, dlen); + free(password); return (authenticated); } /*ARGSUSED*/ static int -auth1_process_rsa(Authctxt *authctxt, char *info, size_t infolen) +auth1_process_rsa(Authctxt *authctxt) { int authenticated = 0; BIGNUM *n; @@ -164,7 +168,7 @@ auth1_process_rsa(Authctxt *authctxt, char *info, size_t infolen) /*ARGSUSED*/ static int -auth1_process_rhosts_rsa(Authctxt *authctxt, char *info, size_t infolen) +auth1_process_rhosts_rsa(Authctxt *authctxt) { int keybits, authenticated = 0; u_int bits; @@ -196,14 +200,14 @@ auth1_process_rhosts_rsa(Authctxt *authctxt, char *info, size_t infolen) client_host_key); key_free(client_host_key); - snprintf(info, infolen, " ruser %.100s", client_user); + auth_info(authctxt, "ruser %.100s", client_user); return (authenticated); } /*ARGSUSED*/ static int -auth1_process_tis_challenge(Authctxt *authctxt, char *info, size_t infolen) +auth1_process_tis_challenge(Authctxt *authctxt) { char *challenge; @@ -213,7 +217,7 @@ auth1_process_tis_challenge(Authctxt *authctxt, char *info, size_t infolen) debug("sending challenge '%s'", challenge); packet_start(SSH_SMSG_AUTH_TIS_CHALLENGE); packet_put_cstring(challenge); - xfree(challenge); + free(challenge); packet_send(); packet_write_wait(); @@ -222,7 +226,7 @@ auth1_process_tis_challenge(Authctxt *authctxt, char *info, size_t infolen) /*ARGSUSED*/ static int -auth1_process_tis_response(Authctxt *authctxt, char *info, size_t infolen) +auth1_process_tis_response(Authctxt *authctxt) { int authenticated = 0; char *response; @@ -231,8 +235,8 @@ auth1_process_tis_response(Authctxt *authctxt, char *info, size_t infolen) response = packet_get_string(&dlen); packet_check_eom(); authenticated = verify_response(authctxt, response); - memset(response, 'r', dlen); - xfree(response); + explicit_bzero(response, dlen); + free(response); return (authenticated); } @@ -245,7 +249,6 @@ static void do_authloop(Authctxt *authctxt) { int authenticated = 0; - char info[1024]; int prev = 0, type = 0; const struct AuthMethod1 *meth; @@ -262,7 +265,8 @@ do_authloop(Authctxt *authctxt) if (options.use_pam && (PRIVSEP(do_pam_account()))) #endif { - auth_log(authctxt, 1, "without authentication", ""); + auth_log(authctxt, 1, 0, "without authentication", + NULL); return; } } @@ -276,7 +280,6 @@ do_authloop(Authctxt *authctxt) /* default to fail */ authenticated = 0; - info[0] = '\0'; /* Get a packet from the client. */ prev = type; @@ -306,7 +309,7 @@ do_authloop(Authctxt *authctxt) goto skip; } - authenticated = meth->method(authctxt, info, sizeof(info)); + authenticated = meth->method(authctxt); if (authenticated == -1) continue; /* "postponed" */ @@ -361,12 +364,10 @@ do_authloop(Authctxt *authctxt) skip: /* Log before sending the reply */ - auth_log(authctxt, authenticated, get_authname(type), info); + auth_log(authctxt, authenticated, 0, get_authname(type), NULL); - if (client_user != NULL) { - xfree(client_user); - client_user = NULL; - } + free(client_user); + client_user = NULL; if (authenticated) return; @@ -375,7 +376,7 @@ do_authloop(Authctxt *authctxt) #ifdef SSH_AUDIT_EVENTS PRIVSEP(audit_event(SSH_LOGIN_EXCEED_MAXTRIES)); #endif - packet_disconnect(AUTH_FAIL_MSG, authctxt->user); + auth_maxtries_exceeded(authctxt); } packet_start(SSH_SMSG_FAILURE); @@ -415,6 +416,11 @@ do_authentication(Authctxt *authctxt) authctxt->pw = fakepw(); } + /* Configuration may have changed as a result of Match */ + if (options.num_auth_methods != 0) + fatal("AuthenticationMethods is not supported with SSH " + "protocol 1"); + setproctitle("%s%s", authctxt->valid ? user : "unknown", use_privsep ? " [net]" : ""); @@ -444,3 +450,5 @@ do_authentication(Authctxt *authctxt) packet_send(); packet_write_wait(); } + +#endif /* WITH_SSH1 */ diff --git a/auth2-chall.c b/auth2-chall.c index e6dbffe..4aff09d 100644 --- a/auth2-chall.c +++ b/auth2-chall.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-chall.c,v 1.34 2008/12/09 04:32:22 djm Exp $ */ +/* $OpenBSD: auth2-chall.c,v 1.43 2015/07/18 07:57:14 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2001 Per Allansson. All rights reserved. @@ -41,6 +41,7 @@ #include "packet.h" #include "dispatch.h" #include "log.h" +#include "misc.h" #include "servconf.h" /* import */ @@ -48,7 +49,7 @@ extern ServerOptions options; static int auth2_challenge_start(Authctxt *); static int send_userauth_info_request(Authctxt *); -static void input_userauth_info_response(int, u_int32_t, void *); +static int input_userauth_info_response(int, u_int32_t, void *); #ifdef BSD_AUTH extern KbdintDevice bsdauth_device; @@ -82,6 +83,7 @@ struct KbdintAuthctxt void *ctxt; KbdintDevice *device; u_int nreq; + u_int devices_done; }; #ifdef USE_PAM @@ -111,7 +113,7 @@ kbdint_alloc(const char *devs) remove_kbdint_device("pam"); #endif - kbdintctxt = xmalloc(sizeof(KbdintAuthctxt)); + kbdintctxt = xcalloc(1, sizeof(KbdintAuthctxt)); if (strcmp(devs, "") == 0) { buffer_init(&b); for (i = 0; devices[i]; i++) { @@ -147,15 +149,13 @@ kbdint_free(KbdintAuthctxt *kbdintctxt) { if (kbdintctxt->device) kbdint_reset_device(kbdintctxt); - if (kbdintctxt->devices) { - xfree(kbdintctxt->devices); - kbdintctxt->devices = NULL; - } - xfree(kbdintctxt); + free(kbdintctxt->devices); + explicit_bzero(kbdintctxt, sizeof(*kbdintctxt)); + free(kbdintctxt); } /* get next device */ static int -kbdint_next_device(KbdintAuthctxt *kbdintctxt) +kbdint_next_device(Authctxt *authctxt, KbdintAuthctxt *kbdintctxt) { size_t len; char *t; @@ -169,12 +169,20 @@ kbdint_next_device(KbdintAuthctxt *kbdintctxt) if (len == 0) break; - for (i = 0; devices[i]; i++) - if (strncmp(kbdintctxt->devices, devices[i]->name, len) == 0) + for (i = 0; devices[i]; i++) { + if ((kbdintctxt->devices_done & (1 << i)) != 0 || + !auth2_method_allowed(authctxt, + "keyboard-interactive", devices[i]->name)) + continue; + if (strncmp(kbdintctxt->devices, devices[i]->name, + len) == 0) { kbdintctxt->device = devices[i]; + kbdintctxt->devices_done |= 1 << i; + } + } t = kbdintctxt->devices; kbdintctxt->devices = t[len] ? xstrdup(t+len+1) : NULL; - xfree(t); + free(t); debug2("kbdint_next_device: devices %s", kbdintctxt->devices ? kbdintctxt->devices : ""); } while (kbdintctxt->devices && !kbdintctxt->device); @@ -221,7 +229,7 @@ auth2_challenge_start(Authctxt *authctxt) debug2("auth2_challenge_start: devices %s", kbdintctxt->devices ? kbdintctxt->devices : ""); - if (kbdint_next_device(kbdintctxt) == 0) { + if (kbdint_next_device(authctxt, kbdintctxt) == 0) { auth2_challenge_stop(authctxt); return 0; } @@ -268,22 +276,23 @@ send_userauth_info_request(Authctxt *authctxt) packet_write_wait(); for (i = 0; i < kbdintctxt->nreq; i++) - xfree(prompts[i]); - xfree(prompts); - xfree(echo_on); - xfree(name); - xfree(instr); + free(prompts[i]); + free(prompts); + free(echo_on); + free(name); + free(instr); return 1; } -static void +static int input_userauth_info_response(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; KbdintAuthctxt *kbdintctxt; int authenticated = 0, res; u_int i, nresp; - char **response = NULL, *method; + const char *devicename = NULL; + char **response = NULL; if (authctxt == NULL) fatal("input_userauth_info_response: no authctxt"); @@ -309,11 +318,10 @@ input_userauth_info_response(int type, u_int32_t seq, void *ctxt) res = kbdintctxt->device->respond(kbdintctxt->ctxt, nresp, response); for (i = 0; i < nresp; i++) { - memset(response[i], 'r', strlen(response[i])); - xfree(response[i]); + explicit_bzero(response[i], strlen(response[i])); + free(response[i]); } - if (response) - xfree(response); + free(response); switch (res) { case 0: @@ -329,9 +337,7 @@ input_userauth_info_response(int type, u_int32_t seq, void *ctxt) /* Failure! */ break; } - - xasprintf(&method, "keyboard-interactive/%s", kbdintctxt->device->name); - + devicename = kbdintctxt->device->name; if (!authctxt->postponed) { if (authenticated) { auth2_challenge_stop(authctxt); @@ -341,8 +347,9 @@ input_userauth_info_response(int type, u_int32_t seq, void *ctxt) auth2_challenge_start(authctxt); } } - userauth_finish(authctxt, authenticated, method); - xfree(method); + userauth_finish(authctxt, authenticated, "keyboard-interactive", + devicename); + return 0; } void diff --git a/auth2-gss.c b/auth2-gss.c index 8a4334d..2a91d6a 100644 --- a/auth2-gss.c +++ b/auth2-gss.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-gss.c,v 1.17 2011/03/10 02:52:57 djm Exp $ */ +/* $OpenBSD: auth2-gss.c,v 1.22 2015/01/19 20:07:45 markus Exp $ */ /* * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. @@ -49,6 +49,7 @@ #include "log.h" #include "dispatch.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "packet.h" #include "ssh-gss.h" @@ -56,10 +57,10 @@ extern ServerOptions options; -static void input_gssapi_token(int type, u_int32_t plen, void *ctxt); -static void input_gssapi_mic(int type, u_int32_t plen, void *ctxt); -static void input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt); -static void input_gssapi_errtok(int, u_int32_t, void *); +static int input_gssapi_token(int type, u_int32_t plen, void *ctxt); +static int input_gssapi_mic(int type, u_int32_t plen, void *ctxt); +static int input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt); +static int input_gssapi_errtok(int, u_int32_t, void *); /* * We only support those mechanisms that we know about (ie ones that we know @@ -71,7 +72,6 @@ userauth_gssapi(Authctxt *authctxt) gss_OID_desc goid = {0, NULL}; Gssctxt *ctxt = NULL; int mechs; - gss_OID_set supported; int present; OM_uint32 ms; u_int len; @@ -86,12 +86,10 @@ userauth_gssapi(Authctxt *authctxt) return (0); } - ssh_gssapi_supported_oids(&supported); do { mechs--; - if (doid) - xfree(doid); + free(doid); present = 0; doid = packet_get_string(&len); @@ -100,17 +98,14 @@ userauth_gssapi(Authctxt *authctxt) doid[1] == len - 2) { goid.elements = doid + 2; goid.length = len - 2; - gss_test_oid_set_member(&ms, &goid, supported, - &present); + ssh_gssapi_test_oid_supported(&ms, &goid, &present); } else { logit("Badly formed OID received"); } } while (mechs > 0 && !present); - gss_release_oid_set(&ms, &supported); - if (!present) { - xfree(doid); + free(doid); authctxt->server_caused_failure = 1; return (0); } @@ -118,7 +113,7 @@ userauth_gssapi(Authctxt *authctxt) if (GSS_ERROR(PRIVSEP(ssh_gssapi_server_ctx(&ctxt, &goid)))) { if (ctxt != NULL) ssh_gssapi_delete_ctx(&ctxt); - xfree(doid); + free(doid); authctxt->server_caused_failure = 1; return (0); } @@ -131,7 +126,7 @@ userauth_gssapi(Authctxt *authctxt) packet_put_string(doid, len); packet_send(); - xfree(doid); + free(doid); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, &input_gssapi_token); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, &input_gssapi_errtok); @@ -140,7 +135,7 @@ userauth_gssapi(Authctxt *authctxt) return (0); } -static void +static int input_gssapi_token(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; @@ -162,7 +157,7 @@ input_gssapi_token(int type, u_int32_t plen, void *ctxt) maj_status = PRIVSEP(ssh_gssapi_accept_ctx(gssctxt, &recv_tok, &send_tok, &flags)); - xfree(recv_tok.value); + free(recv_tok.value); if (GSS_ERROR(maj_status)) { if (send_tok.length != 0) { @@ -172,7 +167,7 @@ input_gssapi_token(int type, u_int32_t plen, void *ctxt) } authctxt->postponed = 0; dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL); - userauth_finish(authctxt, 0, "gssapi-with-mic"); + userauth_finish(authctxt, 0, "gssapi-with-mic", NULL); } else { if (send_tok.length != 0) { packet_start(SSH2_MSG_USERAUTH_GSSAPI_TOKEN); @@ -192,9 +187,10 @@ input_gssapi_token(int type, u_int32_t plen, void *ctxt) } gss_release_buffer(&min_status, &send_tok); + return 0; } -static void +static int input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; @@ -217,7 +213,7 @@ input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) maj_status = PRIVSEP(ssh_gssapi_accept_ctx(gssctxt, &recv_tok, &send_tok, NULL)); - xfree(recv_tok.value); + free(recv_tok.value); /* We can't return anything to the client, even if we wanted to */ dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL); @@ -226,6 +222,7 @@ input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) /* The client will have already moved on to the next auth */ gss_release_buffer(&maj_status, &send_tok); + return 0; } /* @@ -234,18 +231,15 @@ input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) * which only enables it once the GSSAPI exchange is complete. */ -static void +static int input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; - Gssctxt *gssctxt; int authenticated; if (authctxt == NULL || (authctxt->methoddata == NULL && !use_privsep)) fatal("No authentication or GSSAPI context"); - gssctxt = authctxt->methoddata; - /* * We don't need to check the status, because we're only enabled in * the dispatcher once the exchange is complete @@ -260,10 +254,11 @@ input_gssapi_exchange_complete(int type, u_int32_t plen, void *ctxt) dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, NULL); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_MIC, NULL); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE, NULL); - userauth_finish(authctxt, authenticated, "gssapi-with-mic"); + userauth_finish(authctxt, authenticated, "gssapi-with-mic", NULL); + return 0; } -static void +static int input_gssapi_mic(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; @@ -293,14 +288,15 @@ input_gssapi_mic(int type, u_int32_t plen, void *ctxt) logit("GSSAPI MIC check failed"); buffer_free(&b); - xfree(mic.value); + free(mic.value); authctxt->postponed = 0; dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_TOKEN, NULL); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_ERRTOK, NULL); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_MIC, NULL); dispatch_set(SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE, NULL); - userauth_finish(authctxt, authenticated, "gssapi-with-mic"); + userauth_finish(authctxt, authenticated, "gssapi-with-mic", NULL); + return 0; } Authmethod method_gssapi = { diff --git a/auth2-hostbased.c b/auth2-hostbased.c index ea38e0c..7e22b9a 100644 --- a/auth2-hostbased.c +++ b/auth2-hostbased.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-hostbased.c,v 1.14 2010/08/04 05:42:47 djm Exp $ */ +/* $OpenBSD: auth2-hostbased.c,v 1.25 2015/05/04 06:10:48 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -45,6 +45,7 @@ #include "packet.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "key.h" @@ -56,6 +57,7 @@ #endif #include "monitor_wrap.h" #include "pathnames.h" +#include "match.h" /* import */ extern ServerOptions options; @@ -109,6 +111,19 @@ userauth_hostbased(Authctxt *authctxt) "(received %d, expected %d)", key->type, pktype); goto done; } + if (key_type_plain(key->type) == KEY_RSA && + (datafellows & SSH_BUG_RSASIGMD5) != 0) { + error("Refusing RSA key because peer uses unsafe " + "signature format"); + goto done; + } + if (match_pattern_list(sshkey_ssh_name(key), + options.hostbased_key_types, 0) != 1) { + logit("%s: key type %s not in HostbasedAcceptedKeyTypes", + __func__, sshkey_type(key)); + goto done; + } + service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : authctxt->service; buffer_init(&b); @@ -125,6 +140,10 @@ userauth_hostbased(Authctxt *authctxt) #ifdef DEBUG_PK buffer_dump(&b); #endif + + pubkey_auth_info(authctxt, key, + "client user \"%.100s\", client host \"%.100s\"", cuser, chost); + /* test for allowed key and correct signature */ authenticated = 0; if (PRIVSEP(hostbased_key_allowed(authctxt->pw, cuser, chost, key)) && @@ -137,11 +156,11 @@ done: debug2("userauth_hostbased: authenticated %d", authenticated); if (key != NULL) key_free(key); - xfree(pkalg); - xfree(pkblob); - xfree(cuser); - xfree(chost); - xfree(sig); + free(pkalg); + free(pkblob); + free(cuser); + free(chost); + free(sig); return authenticated; } @@ -161,7 +180,7 @@ hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost, resolvedname = get_canonical_hostname(options.use_dns); ipaddr = get_remote_ipaddr(); - debug2("userauth_hostbased: chost %s resolvedname %s ipaddr %s", + debug2("%s: chost %s resolvedname %s ipaddr %s", __func__, chost, resolvedname, ipaddr); if (((len = strlen(chost)) > 0) && chost[len - 1] == '.') { @@ -170,19 +189,27 @@ hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost, } if (options.hostbased_uses_name_from_packet_only) { - if (auth_rhosts2(pw, cuser, chost, chost) == 0) + if (auth_rhosts2(pw, cuser, chost, chost) == 0) { + debug2("%s: auth_rhosts2 refused " + "user \"%.100s\" host \"%.100s\" (from packet)", + __func__, cuser, chost); return 0; + } lookup = chost; } else { if (strcasecmp(resolvedname, chost) != 0) logit("userauth_hostbased mismatch: " "client sends %s, but we resolve %s to %s", chost, ipaddr, resolvedname); - if (auth_rhosts2(pw, cuser, resolvedname, ipaddr) == 0) + if (auth_rhosts2(pw, cuser, resolvedname, ipaddr) == 0) { + debug2("%s: auth_rhosts2 refused " + "user \"%.100s\" host \"%.100s\" addr \"%.100s\"", + __func__, cuser, resolvedname, ipaddr); return 0; + } lookup = resolvedname; } - debug2("userauth_hostbased: access allowed by auth_rhosts2"); + debug2("%s: access allowed by auth_rhosts2", __func__); if (key_is_cert(key) && key_cert_check_authority(key, 1, 0, lookup, &reason)) { @@ -205,18 +232,21 @@ hostbased_key_allowed(struct passwd *pw, const char *cuser, char *chost, if (host_status == HOST_OK) { if (key_is_cert(key)) { - fp = key_fingerprint(key->cert->signature_key, - SSH_FP_MD5, SSH_FP_HEX); + if ((fp = sshkey_fingerprint(key->cert->signature_key, + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); verbose("Accepted certificate ID \"%s\" signed by " "%s CA %s from %s@%s", key->cert->key_id, key_type(key->cert->signature_key), fp, cuser, lookup); } else { - fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); + if ((fp = sshkey_fingerprint(key, + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); verbose("Accepted %s public key %s from %s@%s", key_type(key), fp, cuser, lookup); } - xfree(fp); + free(fp); } return (host_status == HOST_OK); diff --git a/auth2-kbdint.c b/auth2-kbdint.c index fae67da..bf75c60 100644 --- a/auth2-kbdint.c +++ b/auth2-kbdint.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-kbdint.c,v 1.5 2006/08/03 03:34:41 deraadt Exp $ */ +/* $OpenBSD: auth2-kbdint.c,v 1.7 2014/07/15 15:54:14 millert Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -36,6 +36,7 @@ #include "auth.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" /* import */ @@ -56,8 +57,8 @@ userauth_kbdint(Authctxt *authctxt) if (options.challenge_response_authentication) authenticated = auth2_challenge(authctxt, devs); - xfree(devs); - xfree(lang); + free(devs); + free(lang); return authenticated; } diff --git a/auth2-none.c b/auth2-none.c index 53322d8..36b7679 100644 --- a/auth2-none.c +++ b/auth2-none.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-none.c,v 1.16 2010/06/25 08:46:17 djm Exp $ */ +/* $OpenBSD: auth2-none.c,v 1.18 2014/07/15 15:54:14 millert Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -39,9 +39,10 @@ #include #include -#include #include #include +#include +#include #include "atomicio.h" #include "xmalloc.h" @@ -51,6 +52,7 @@ #include "packet.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "ssh2.h" diff --git a/auth2-passwd.c b/auth2-passwd.c index 5f1f363..b638e87 100644 --- a/auth2-passwd.c +++ b/auth2-passwd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-passwd.c,v 1.9 2006/08/03 03:34:41 deraadt Exp $ */ +/* $OpenBSD: auth2-passwd.c,v 1.12 2014/07/15 15:54:14 millert Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -41,6 +41,7 @@ #include "ssh-gss.h" #endif #include "monitor_wrap.h" +#include "misc.h" #include "servconf.h" /* import */ @@ -59,8 +60,8 @@ userauth_passwd(Authctxt *authctxt) if (change) { /* discard new password from packet */ newpass = packet_get_string(&newlen); - memset(newpass, 0, newlen); - xfree(newpass); + explicit_bzero(newpass, newlen); + free(newpass); } packet_check_eom(); @@ -68,8 +69,8 @@ userauth_passwd(Authctxt *authctxt) logit("password change not supported"); else if (PRIVSEP(auth_password(authctxt, password)) == 1) authenticated = 1; - memset(password, 0, len); - xfree(password); + explicit_bzero(password, len); + free(password); return authenticated; } diff --git a/auth2-pubkey.c b/auth2-pubkey.c index e0ac649..2acb300 100644 --- a/auth2-pubkey.c +++ b/auth2-pubkey.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2-pubkey.c,v 1.29 2011/05/23 03:30:07 djm Exp $ */ +/* $OpenBSD: auth2-pubkey.c,v 1.53 2015/06/15 18:44:22 jsing Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -36,14 +36,21 @@ #include #include +#include +#include #include +#ifdef HAVE_PATHS_H +# include +#endif #include +#include #include #include #include #include #include +#include #include "xmalloc.h" #include "ssh.h" @@ -51,6 +58,7 @@ #include "packet.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "key.h" @@ -64,9 +72,11 @@ #include "ssh-gss.h" #endif #include "monitor_wrap.h" -#include "misc.h" #include "authfile.h" #include "match.h" +#include "ssherr.h" +#include "channels.h" /* XXX for session.h */ +#include "session.h" /* XXX for child_set_env(); refactor? */ /* import */ extern ServerOptions options; @@ -79,6 +89,7 @@ extern u_int session_id2_len; #endif + static int userauth_pubkey(Authctxt *authctxt) { @@ -99,10 +110,10 @@ userauth_pubkey(Authctxt *authctxt) # endif #endif - + Buffer b; Key *key = NULL; - char *pkalg; + char *pkalg, *userstyle; u_char *pkblob, *sig; u_int alen, blen, slen; int have_sig, pktype; @@ -143,6 +154,23 @@ userauth_pubkey(Authctxt *authctxt) "(received %d, expected %d)", key->type, pktype); goto done; } + if (key_type_plain(key->type) == KEY_RSA && + (datafellows & SSH_BUG_RSASIGMD5) != 0) { + logit("Refusing RSA key because client uses unsafe " + "signature scheme"); + goto done; + } + if (auth2_userkey_already_used(authctxt, key)) { + logit("refusing previously-used %s key", key_type(key)); + goto done; + } + if (match_pattern_list(sshkey_ssh_name(key), + options.pubkey_key_types, 0) != 1) { + logit("%s: key type %s not in PubkeyAcceptedKeyTypes", + __func__, sshkey_ssh_name(key)); + goto done; + } + if (have_sig) { sig = packet_get_string(&slen); packet_check_eom(); @@ -154,7 +182,11 @@ userauth_pubkey(Authctxt *authctxt) } /* reconstruct packet */ buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); - buffer_put_cstring(&b, authctxt->user); + xasprintf(&userstyle, "%s%s%s", authctxt->user, + authctxt->style ? ":" : "", + authctxt->style ? authctxt->style : ""); + buffer_put_cstring(&b, userstyle); + free(userstyle); buffer_put_cstring(&b, datafellows & SSH_BUG_PKSERVICE ? "ssh-userauth" : @@ -170,10 +202,11 @@ userauth_pubkey(Authctxt *authctxt) #ifdef DEBUG_PK buffer_dump(&b); #endif + pubkey_auth_info(authctxt, key, NULL); + /* test for correct signature */ authenticated = 0; - - /* + /* * On pure win32 try to logon using lsa first. */ @@ -227,7 +260,7 @@ userauth_pubkey(Authctxt *authctxt) authctxt -> pw -> pw_dir = GetHomeDir(authctxt -> user); - if (PRIVSEP(user_key_allowed(authctxt -> pw, key))) + if (PRIVSEP(user_key_allowed(authctxt -> pw, key, 1))) // PRAGMA:TODO { authenticated = 1; } @@ -238,7 +271,7 @@ userauth_pubkey(Authctxt *authctxt) buffer_free(&b); - xfree(sig); + free(sig); } } } @@ -251,7 +284,8 @@ userauth_pubkey(Authctxt *authctxt) authctxt -> pw -> pw_dir = GetHomeDir(authctxt -> user); - if (PRIVSEP(user_key_allowed(authctxt->pw, key)) && + if (PRIVSEP(user_key_allowed(authctxt->pw, key, 0)) //PRAGMA:TODO + && PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b))) == 1) { @@ -265,15 +299,17 @@ userauth_pubkey(Authctxt *authctxt) #else /* #ifdef WIN32_FIXME */ - if (PRIVSEP(user_key_allowed(authctxt->pw, key)) && + if (PRIVSEP(user_key_allowed(authctxt->pw, key, 1)) && PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b), - buffer_len(&b))) == 1) + buffer_len(&b))) == 1) { authenticated = 1; - - #endif /* else #ifdef WIN32_FIXME. */ - + /* Record the successful key to prevent reuse */ + auth2_record_userkey(authctxt, key); + key = NULL; /* Don't free below */ + } + #endif /* else #ifdef WIN32_FIXME. */ buffer_free(&b); - xfree(sig); + free(sig); } else { debug("test whether pkalg/pkblob are acceptable"); packet_check_eom(); @@ -286,14 +322,14 @@ userauth_pubkey(Authctxt *authctxt) * if a user is not allowed to login. is this an * issue? -markus */ + #ifndef WIN32_FIXME - if (PRIVSEP(user_key_allowed(authctxt -> pw, key))) + if (PRIVSEP(user_key_allowed(authctxt->pw, key, 0))) - #endif - - { + #endif + { packet_start(SSH2_MSG_USERAUTH_PK_OK); packet_put_string(pkalg, alen); packet_put_string(pkblob, blen); @@ -308,13 +344,341 @@ done: debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg); if (key != NULL) key_free(key); - xfree(pkalg); - xfree(pkblob); + free(pkalg); + free(pkblob); return authenticated; } +void +pubkey_auth_info(Authctxt *authctxt, const Key *key, const char *fmt, ...) +{ + char *fp, *extra; + va_list ap; + int i; + + extra = NULL; + if (fmt != NULL) { + va_start(ap, fmt); + i = vasprintf(&extra, fmt, ap); + va_end(ap); + if (i < 0 || extra == NULL) + fatal("%s: vasprintf failed", __func__); + } + + if (key_is_cert(key)) { + fp = sshkey_fingerprint(key->cert->signature_key, + options.fingerprint_hash, SSH_FP_DEFAULT); + auth_info(authctxt, "%s ID %s (serial %llu) CA %s %s%s%s", + key_type(key), key->cert->key_id, + (unsigned long long)key->cert->serial, + key_type(key->cert->signature_key), + fp == NULL ? "(null)" : fp, + extra == NULL ? "" : ", ", extra == NULL ? "" : extra); + free(fp); + } else { + fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT); + auth_info(authctxt, "%s %s%s%s", key_type(key), + fp == NULL ? "(null)" : fp, + extra == NULL ? "" : ", ", extra == NULL ? "" : extra); + free(fp); + } + free(extra); +} + +/* + * Splits 's' into an argument vector. Handles quoted string and basic + * escape characters (\\, \", \'). Caller must free the argument vector + * and its members. + */ static int -match_principals_option(const char *principal_list, struct KeyCert *cert) +split_argv(const char *s, int *argcp, char ***argvp) +{ + int r = SSH_ERR_INTERNAL_ERROR; + int argc = 0, quote, i, j; + char *arg, **argv = xcalloc(1, sizeof(*argv)); + + *argvp = NULL; + *argcp = 0; + + for (i = 0; s[i] != '\0'; i++) { + /* Skip leading whitespace */ + if (s[i] == ' ' || s[i] == '\t') + continue; + + /* Start of a token */ + quote = 0; + if (s[i] == '\\' && + (s[i + 1] == '\'' || s[i + 1] == '\"' || s[i + 1] == '\\')) + i++; + else if (s[i] == '\'' || s[i] == '"') + quote = s[i++]; + + argv = xreallocarray(argv, (argc + 2), sizeof(*argv)); + arg = argv[argc++] = xcalloc(1, strlen(s + i) + 1); + argv[argc] = NULL; + + /* Copy the token in, removing escapes */ + for (j = 0; s[i] != '\0'; i++) { + if (s[i] == '\\') { + if (s[i + 1] == '\'' || + s[i + 1] == '\"' || + s[i + 1] == '\\') { + i++; /* Skip '\' */ + arg[j++] = s[i]; + } else { + /* Unrecognised escape */ + arg[j++] = s[i]; + } + } else if (quote == 0 && (s[i] == ' ' || s[i] == '\t')) + break; /* done */ + else if (quote != 0 && s[i] == quote) + break; /* done */ + else + arg[j++] = s[i]; + } + if (s[i] == '\0') { + if (quote != 0) { + /* Ran out of string looking for close quote */ + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + break; + } + } + /* Success */ + *argcp = argc; + *argvp = argv; + argc = 0; + argv = NULL; + r = 0; + out: + if (argc != 0 && argv != NULL) { + for (i = 0; i < argc; i++) + free(argv[i]); + free(argv); + } + return r; +} + +/* + * Reassemble an argument vector into a string, quoting and escaping as + * necessary. Caller must free returned string. + */ +static char * +assemble_argv(int argc, char **argv) +{ + int i, j, ws, r; + char c, *ret; + struct sshbuf *buf, *arg; + + if ((buf = sshbuf_new()) == NULL || (arg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + + for (i = 0; i < argc; i++) { + ws = 0; + sshbuf_reset(arg); + for (j = 0; argv[i][j] != '\0'; j++) { + r = 0; + c = argv[i][j]; + switch (c) { + case ' ': + case '\t': + ws = 1; + r = sshbuf_put_u8(arg, c); + break; + case '\\': + case '\'': + case '"': + if ((r = sshbuf_put_u8(arg, '\\')) != 0) + break; + /* FALLTHROUGH */ + default: + r = sshbuf_put_u8(arg, c); + break; + } + if (r != 0) + fatal("%s: sshbuf_put_u8: %s", + __func__, ssh_err(r)); + } + if ((i != 0 && (r = sshbuf_put_u8(buf, ' ')) != 0) || + (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0) || + (r = sshbuf_putb(buf, arg)) != 0 || + (ws != 0 && (r = sshbuf_put_u8(buf, '"')) != 0)) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + } + if ((ret = malloc(sshbuf_len(buf) + 1)) == NULL) + fatal("%s: malloc failed", __func__); + memcpy(ret, sshbuf_ptr(buf), sshbuf_len(buf)); + ret[sshbuf_len(buf)] = '\0'; + sshbuf_free(buf); + sshbuf_free(arg); + return ret; +} + +/* + * Runs command in a subprocess. Returns pid on success and a FILE* to the + * subprocess' stdout or 0 on failure. + * NB. "command" is only used for logging. + */ +static pid_t +subprocess(const char *tag, struct passwd *pw, const char *command, + int ac, char **av, FILE **child) +{ +#ifndef WIN32_FIXME + FILE *f; + struct stat st; + int devnull, p[2], i; + pid_t pid; + char *cp, errmsg[512]; + u_int envsize; + char **child_env; + + *child = NULL; + + debug3("%s: %s command \"%s\" running as %s", __func__, + tag, command, pw->pw_name); + + /* Verify the path exists and is safe-ish to execute */ + if (*av[0] != '/') { + error("%s path is not absolute", tag); + return 0; + } + temporarily_use_uid(pw); + if (stat(av[0], &st) < 0) { + error("Could not stat %s \"%s\": %s", tag, + av[0], strerror(errno)); + restore_uid(); + return 0; + } + if (auth_secure_path(av[0], &st, NULL, 0, + errmsg, sizeof(errmsg)) != 0) { + error("Unsafe %s \"%s\": %s", tag, av[0], errmsg); + restore_uid(); + return 0; + } + + /* + * Run the command; stderr is left in place, stdout is the + * authorized_keys output. + */ + if (pipe(p) != 0) { + error("%s: pipe: %s", tag, strerror(errno)); + restore_uid(); + return 0; + } + + /* + * Don't want to call this in the child, where it can fatal() and + * run cleanup_exit() code. + */ + restore_uid(); + + switch ((pid = fork())) { + case -1: /* error */ + error("%s: fork: %s", tag, strerror(errno)); + close(p[0]); + close(p[1]); + return 0; + case 0: /* child */ + /* Prepare a minimal environment for the child. */ + envsize = 5; + child_env = xcalloc(sizeof(*child_env), envsize); + child_set_env(&child_env, &envsize, "PATH", _PATH_STDPATH); + child_set_env(&child_env, &envsize, "USER", pw->pw_name); + child_set_env(&child_env, &envsize, "LOGNAME", pw->pw_name); + child_set_env(&child_env, &envsize, "HOME", pw->pw_dir); + if ((cp = getenv("LANG")) != NULL) + child_set_env(&child_env, &envsize, "LANG", cp); + + for (i = 0; i < NSIG; i++) + signal(i, SIG_DFL); + + if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1) { + error("%s: open %s: %s", tag, _PATH_DEVNULL, + strerror(errno)); + _exit(1); + } + /* Keep stderr around a while longer to catch errors */ + if (dup2(devnull, STDIN_FILENO) == -1 || + dup2(p[1], STDOUT_FILENO) == -1) { + error("%s: dup2: %s", tag, strerror(errno)); + _exit(1); + } + closefrom(STDERR_FILENO + 1); + + /* Don't use permanently_set_uid() here to avoid fatal() */ + if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) != 0) { + error("%s: setresgid %u: %s", tag, (u_int)pw->pw_gid, + strerror(errno)); + _exit(1); + } + if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) != 0) { + error("%s: setresuid %u: %s", tag, (u_int)pw->pw_uid, + strerror(errno)); + _exit(1); + } + /* stdin is pointed to /dev/null at this point */ + if (dup2(STDIN_FILENO, STDERR_FILENO) == -1) { + error("%s: dup2: %s", tag, strerror(errno)); + _exit(1); + } + + execve(av[0], av, child_env); + error("%s exec \"%s\": %s", tag, command, strerror(errno)); + _exit(127); + default: /* parent */ + break; + } + + close(p[1]); + if ((f = fdopen(p[0], "r")) == NULL) { + error("%s: fdopen: %s", tag, strerror(errno)); + close(p[0]); + /* Don't leave zombie child */ + kill(pid, SIGTERM); + while (waitpid(pid, NULL, 0) == -1 && errno == EINTR) + ; + return 0; + } + /* Success */ + debug3("%s: %s pid %ld", __func__, tag, (long)pid); + *child = f; + return pid; +#else + return 0; +#endif +} + +/* Returns 0 if pid exited cleanly, non-zero otherwise */ +static int +exited_cleanly(pid_t pid, const char *tag, const char *cmd) +{ +#ifndef WIN32_FIXME +// PRAGMA: TODO + int status; + + while (waitpid(pid, &status, 0) == -1) { + if (errno != EINTR) { + error("%s: waitpid: %s", tag, strerror(errno)); + return -1; + } + } + if (WIFSIGNALED(status)) { + error("%s %s exited on signal %d", tag, cmd, WTERMSIG(status)); + return -1; + } else if (WEXITSTATUS(status) != 0) { + error("%s %s failed, status %d", tag, cmd, WEXITSTATUS(status)); + return -1; + } + return 0; +#else + return 0; +#endif +} + +static int +match_principals_option(const char *principal_list, struct sshkey_cert *cert) { char *result; u_int i; @@ -326,7 +690,7 @@ match_principals_option(const char *principal_list, struct KeyCert *cert) principal_list, NULL)) != NULL) { debug3("matched principal from key options \"%.100s\"", result); - xfree(result); + free(result); return 1; } } @@ -334,19 +698,13 @@ match_principals_option(const char *principal_list, struct KeyCert *cert) } static int -match_principals_file(char *file, struct passwd *pw, struct KeyCert *cert) +process_principals(FILE *f, char *file, struct passwd *pw, + struct sshkey_cert *cert) { - FILE *f; char line[SSH_MAX_PUBKEY_BYTES], *cp, *ep, *line_opts; u_long linenum = 0; u_int i; - temporarily_use_uid(pw); - debug("trying authorized principals file %s", file); - if ((f = auth_openprincipals(file, pw, options.strict_modes)) == NULL) { - restore_uid(); - return 0; - } while (read_keyfile_line(f, file, line, sizeof(line), &linenum) != -1) { /* Skip leading whitespace. */ for (cp = line; *cp == ' ' || *cp == '\t'; cp++) @@ -374,51 +732,152 @@ match_principals_file(char *file, struct passwd *pw, struct KeyCert *cert) } for (i = 0; i < cert->nprincipals; i++) { if (strcmp(cp, cert->principals[i]) == 0) { - debug3("matched principal from file \"%.100s\"", - cert->principals[i]); + debug3("%s:%lu: matched principal \"%.100s\"", + file == NULL ? "(command)" : file, + linenum, cert->principals[i]); if (auth_parse_options(pw, line_opts, file, linenum) != 1) continue; - fclose(f); - restore_uid(); return 1; } } } + return 0; +} + +static int +match_principals_file(char *file, struct passwd *pw, struct sshkey_cert *cert) +{ + FILE *f; + int success; + + temporarily_use_uid(pw); + debug("trying authorized principals file %s", file); + if ((f = auth_openprincipals(file, pw, options.strict_modes)) == NULL) { + restore_uid(); + return 0; + } + success = process_principals(f, file, pw, cert); fclose(f); restore_uid(); - return 0; -} + return success; +} -/* return 1 if user allows given key */ +/* + * Checks whether principal is allowed in output of command. + * returns 1 if the principal is allowed or 0 otherwise. + */ static int -user_key_allowed2(struct passwd *pw, Key *key, char *file) +match_principals_command(struct passwd *user_pw, struct sshkey_cert *cert) +{ + FILE *f = NULL; + int ok, found_principal = 0; + struct passwd *pw; + int i, ac = 0, uid_swapped = 0; + pid_t pid; + char *tmp, *username = NULL, *command = NULL, **av = NULL; + void (*osigchld)(int); + + if (options.authorized_principals_command == NULL) + return 0; + if (options.authorized_principals_command_user == NULL) { + error("No user for AuthorizedPrincipalsCommand specified, " + "skipping"); + return 0; + } + + /* + * NB. all returns later this function should go via "out" to + * ensure the original SIGCHLD handler is restored properly. + */ +#ifndef WIN32_FIXME +// PRAGMA:TODO + osigchld = signal(SIGCHLD, SIG_DFL); +#endif + + /* Prepare and verify the user for the command */ + username = percent_expand(options.authorized_principals_command_user, + "u", user_pw->pw_name, (char *)NULL); + pw = getpwnam(username); + if (pw == NULL) { + error("AuthorizedPrincipalsCommandUser \"%s\" not found: %s", + username, strerror(errno)); + goto out; + } + + /* Turn the command into an argument vector */ + if (split_argv(options.authorized_principals_command, &ac, &av) != 0) { + error("AuthorizedPrincipalsCommand \"%s\" contains " + "invalid quotes", command); + goto out; + } + if (ac == 0) { + error("AuthorizedPrincipalsCommand \"%s\" yielded no arguments", + command); + goto out; + } + for (i = 1; i < ac; i++) { + tmp = percent_expand(av[i], + "u", user_pw->pw_name, + "h", user_pw->pw_dir, + (char *)NULL); + if (tmp == NULL) + fatal("%s: percent_expand failed", __func__); + free(av[i]); + av[i] = tmp; + } + /* Prepare a printable command for logs, etc. */ + command = assemble_argv(ac, av); + + if ((pid = subprocess("AuthorizedPrincipalsCommand", pw, command, + ac, av, &f)) == 0) + goto out; + + uid_swapped = 1; + temporarily_use_uid(pw); + + ok = process_principals(f, NULL, pw, cert); + + if (exited_cleanly(pid, "AuthorizedPrincipalsCommand", command) != 0) + goto out; + + /* Read completed successfully */ + found_principal = ok; + out: + if (f != NULL) + fclose(f); + signal(SIGCHLD, osigchld); + for (i = 0; i < ac; i++) + free(av[i]); + free(av); + if (uid_swapped) + restore_uid(); + free(command); + free(username); + return found_principal; +} +/* + * Checks whether key is allowed in authorized_keys-format file, + * returns 1 if the key is allowed or 0 otherwise. + */ +static int +check_authkeys_file(FILE *f, char *file, Key* key, struct passwd *pw) { char line[SSH_MAX_PUBKEY_BYTES]; const char *reason; int found_key = 0; - FILE *f; u_long linenum = 0; Key *found; char *fp; - /* Temporarily use the user's uid. */ - temporarily_use_uid(pw); - - debug("trying public key file %ls", file); - f = auth_openkeyfile(file, pw, options.strict_modes); - - if (!f) { - restore_uid(); - return 0; - } - found_key = 0; - found = key_new(key_is_cert(key) ? KEY_UNSPEC : key->type); + found = NULL; while (read_keyfile_line(f, file, line, sizeof(line), &linenum) != -1) { char *cp, *key_options = NULL; - + if (found != NULL) + key_free(found); + found = key_new(key_is_cert(key) ? KEY_UNSPEC : key->type); auth_clear_options(); /* Skip leading whitespace, empty and comment lines. */ @@ -455,8 +914,9 @@ user_key_allowed2(struct passwd *pw, Key *key, char *file) continue; if (!key_is_cert_authority) continue; - fp = key_fingerprint(found, SSH_FP_MD5, - SSH_FP_HEX); + if ((fp = sshkey_fingerprint(found, + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + continue; debug("matching CA found: file %s, line %lu, %s %s", file, linenum, key_type(found), fp); /* @@ -470,7 +930,7 @@ user_key_allowed2(struct passwd *pw, Key *key, char *file) reason = "Certificate does not contain an " "authorized principal"; fail_reason: - xfree(fp); + free(fp); error("%s", reason); auth_debug_add("%s", reason); continue; @@ -480,13 +940,13 @@ user_key_allowed2(struct passwd *pw, Key *key, char *file) &reason) != 0) goto fail_reason; if (auth_cert_options(key, pw) != 0) { - xfree(fp); + free(fp); continue; } verbose("Accepted certificate ID \"%s\" " "signed by %s CA %s via %s", key->cert->key_id, key_type(found), fp, file); - xfree(fp); + free(fp); found_key = 1; break; } else if (key_equal(found, key)) { @@ -495,19 +955,18 @@ user_key_allowed2(struct passwd *pw, Key *key, char *file) continue; if (key_is_cert_authority) continue; + if ((fp = sshkey_fingerprint(found, + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + continue; + debug("matching key found: file %s, line %lu %s %s", + file, linenum, key_type(found), fp); + free(fp); found_key = 1; - debug("matching key found: file %s, line %lu", - file, linenum); - fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX); - verbose("Found matching %s key: %s", - key_type(found), fp); - xfree(fp); break; } } - restore_uid(); - fclose(f); - key_free(found); + if (found != NULL) + key_free(found); if (!found_key) debug2("key not found"); return found_key; @@ -519,16 +978,17 @@ user_cert_trusted_ca(struct passwd *pw, Key *key) { char *ca_fp, *principals_file = NULL; const char *reason; - int ret = 0; + int ret = 0, found_principal = 0, use_authorized_principals; if (!key_is_cert(key) || options.trusted_user_ca_keys == NULL) return 0; - ca_fp = key_fingerprint(key->cert->signature_key, - SSH_FP_MD5, SSH_FP_HEX); + if ((ca_fp = sshkey_fingerprint(key->cert->signature_key, + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + return 0; - if (key_in_file(key->cert->signature_key, - options.trusted_user_ca_keys, 1) != 1) { + if (sshkey_in_file(key->cert->signature_key, + options.trusted_user_ca_keys, 1, 0) != 0) { debug2("%s: CA %s %s is not listed in %s", __func__, key_type(key->cert->signature_key), ca_fp, options.trusted_user_ca_keys); @@ -540,17 +1000,24 @@ user_cert_trusted_ca(struct passwd *pw, Key *key) * against the username. */ if ((principals_file = authorized_principals_file(pw)) != NULL) { - if (!match_principals_file(principals_file, pw, key->cert)) { - reason = "Certificate does not contain an " - "authorized principal"; + if (match_principals_file(principals_file, pw, key->cert)) + found_principal = 1; + } + /* Try querying command if specified */ + if (!found_principal && match_principals_command(pw, key->cert)) + found_principal = 1; + /* If principals file or command is specified, then require a match */ + use_authorized_principals = principals_file != NULL || + options.authorized_principals_command != NULL; + if (!found_principal && use_authorized_principals) { + reason = "Certificate does not contain an authorized principal"; fail_reason: - error("%s", reason); - auth_debug_add("%s", reason); - goto out; - } + error("%s", reason); + auth_debug_add("%s", reason); + goto out; } if (key_cert_check_authority(key, 0, 1, - principals_file == NULL ? pw->pw_name : NULL, &reason) != 0) + use_authorized_principals ? NULL : pw->pw_name, &reason) != 0) goto fail_reason; if (auth_cert_options(key, pw) != 0) goto out; @@ -561,16 +1028,162 @@ user_cert_trusted_ca(struct passwd *pw, Key *key) ret = 1; out: - if (principals_file != NULL) - xfree(principals_file); - if (ca_fp != NULL) - xfree(ca_fp); + free(principals_file); + free(ca_fp); return ret; } -/* check whether given key is in .ssh/authorized_keys* */ +/* + * Checks whether key is allowed in file. + * returns 1 if the key is allowed or 0 otherwise. + */ +static int +user_key_allowed2(struct passwd *pw, Key *key, char *file) +{ + FILE *f; + int found_key = 0; + + /* Temporarily use the user's uid. */ + temporarily_use_uid(pw); + + debug("trying public key file %s", file); + if ((f = auth_openkeyfile(file, pw, options.strict_modes)) != NULL) { + found_key = check_authkeys_file(f, file, key, pw); + fclose(f); + } + + restore_uid(); + return found_key; +} + +/* + * Checks whether key is allowed in output of command. + * returns 1 if the key is allowed or 0 otherwise. + */ +static int +user_key_command_allowed2(struct passwd *user_pw, Key *key) +{ + FILE *f = NULL; + int r, ok, found_key = 0; + struct passwd *pw; + int i, uid_swapped = 0, ac = 0; + pid_t pid; + char *username = NULL, *key_fp = NULL, *keytext = NULL; + char *tmp, *command = NULL, **av = NULL; + void (*osigchld)(int); + + if (options.authorized_keys_command == NULL) + return 0; + if (options.authorized_keys_command_user == NULL) { + error("No user for AuthorizedKeysCommand specified, skipping"); + return 0; + } + + /* + * NB. all returns later this function should go via "out" to + * ensure the original SIGCHLD handler is restored properly. + */ + #ifndef WIN32_FIXME + //PRAGMA:TODO + osigchld = signal(SIGCHLD, SIG_DFL); + #endif + /* Prepare and verify the user for the command */ + username = percent_expand(options.authorized_keys_command_user, + "u", user_pw->pw_name, (char *)NULL); + pw = getpwnam(username); + if (pw == NULL) { + error("AuthorizedKeysCommandUser \"%s\" not found: %s", + username, strerror(errno)); + goto out; + } + + /* Prepare AuthorizedKeysCommand */ + if ((key_fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) { + error("%s: sshkey_fingerprint failed", __func__); + goto out; + } + if ((r = sshkey_to_base64(key, &keytext)) != 0) { + error("%s: sshkey_to_base64 failed: %s", __func__, ssh_err(r)); + goto out; + } + + /* Turn the command into an argument vector */ + if (split_argv(options.authorized_keys_command, &ac, &av) != 0) { + error("AuthorizedKeysCommand \"%s\" contains invalid quotes", + command); + goto out; + } + if (ac == 0) { + error("AuthorizedKeysCommand \"%s\" yielded no arguments", + command); + goto out; + } + for (i = 1; i < ac; i++) { + tmp = percent_expand(av[i], + "u", user_pw->pw_name, + "h", user_pw->pw_dir, + "t", sshkey_ssh_name(key), + "f", key_fp, + "k", keytext, + (char *)NULL); + if (tmp == NULL) + fatal("%s: percent_expand failed", __func__); + free(av[i]); + av[i] = tmp; + } + /* Prepare a printable command for logs, etc. */ + command = assemble_argv(ac, av); + + /* + * If AuthorizedKeysCommand was run without arguments + * then fall back to the old behaviour of passing the + * target username as a single argument. + */ + if (ac == 1) { + av = xreallocarray(av, ac + 2, sizeof(*av)); + av[1] = xstrdup(user_pw->pw_name); + av[2] = NULL; + /* Fix up command too, since it is used in log messages */ + free(command); + xasprintf(&command, "%s %s", av[0], av[1]); + } + + if ((pid = subprocess("AuthorizedKeysCommand", pw, command, + ac, av, &f)) == 0) + goto out; + + uid_swapped = 1; + temporarily_use_uid(pw); + + ok = check_authkeys_file(f, options.authorized_keys_command, key, pw); + + if (exited_cleanly(pid, "AuthorizedKeysCommand", command) != 0) + goto out; + + /* Read completed successfully */ + found_key = ok; + out: + if (f != NULL) + fclose(f); + signal(SIGCHLD, osigchld); + for (i = 0; i < ac; i++) + free(av[i]); + free(av); + if (uid_swapped) + restore_uid(); + free(command); + free(username); + free(key_fp); + free(keytext); + return found_key; +} + +/* + * Check whether key authenticates and authorises the user. + */ int -user_key_allowed(struct passwd *pw, Key *key) +user_key_allowed(struct passwd *pw, Key *key, int auth_attempt) { u_int success, i; char *file; @@ -584,16 +1197,53 @@ user_key_allowed(struct passwd *pw, Key *key) if (success) return success; + success = user_key_command_allowed2(pw, key); + if (success > 0) + return success; + for (i = 0; !success && i < options.num_authkeys_files; i++) { + + if (strcasecmp(options.authorized_keys_files[i], "none") == 0) + continue; file = expand_authorized_keys( options.authorized_keys_files[i], pw); + success = user_key_allowed2(pw, key, file); - xfree(file); + free(file); } return success; } +/* Records a public key in the list of previously-successful keys */ +void +auth2_record_userkey(Authctxt *authctxt, struct sshkey *key) +{ + struct sshkey **tmp; + + if (authctxt->nprev_userkeys >= INT_MAX || + (tmp = reallocarray(authctxt->prev_userkeys, + authctxt->nprev_userkeys + 1, sizeof(*tmp))) == NULL) + fatal("%s: reallocarray failed", __func__); + authctxt->prev_userkeys = tmp; + authctxt->prev_userkeys[authctxt->nprev_userkeys] = key; + authctxt->nprev_userkeys++; +} + +/* Checks whether a key has already been used successfully for authentication */ +int +auth2_userkey_already_used(Authctxt *authctxt, struct sshkey *key) +{ + u_int i; + + for (i = 0; i < authctxt->nprev_userkeys; i++) { + if (sshkey_equal_public(key, authctxt->prev_userkeys[i])) { + return 1; + } + } + return 0; +} + Authmethod method_pubkey = { "publickey", userauth_pubkey, diff --git a/auth2.c b/auth2.c index 5eaa842..aa08084 100644 --- a/auth2.c +++ b/auth2.c @@ -1,4 +1,4 @@ -/* $OpenBSD: auth2.c,v 1.123 2011/03/10 02:52:57 djm Exp $ */ +/* $OpenBSD: auth2.c,v 1.135 2015/01/19 20:07:45 markus Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -50,6 +50,7 @@ #include "packet.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "key.h" @@ -80,18 +81,12 @@ extern Authmethod method_hostbased; #ifdef GSSAPI extern Authmethod method_gssapi; #endif -#ifdef JPAKE -extern Authmethod method_jpake; -#endif Authmethod *authmethods[] = { &method_none, &method_pubkey, #ifdef GSSAPI &method_gssapi, -#endif -#ifdef JPAKE - &method_jpake, #endif &method_passwd, &method_kbdint, @@ -101,12 +96,18 @@ Authmethod *authmethods[] = { /* protocol */ -static void input_service_request(int, u_int32_t, void *); -static void input_userauth_request(int, u_int32_t, void *); +static int input_service_request(int, u_int32_t, void *); +static int input_userauth_request(int, u_int32_t, void *); /* helper */ -static Authmethod *authmethod_lookup(const char *); -static char *authmethods_get(void); +static Authmethod *authmethod_lookup(Authctxt *, const char *); +static char *authmethods_get(Authctxt *authctxt); + +#define MATCH_NONE 0 /* method or submethod mismatch */ +#define MATCH_METHOD 1 /* method matches (no submethod specified) */ +#define MATCH_BOTH 2 /* method and submethod match */ +#define MATCH_PARTIAL 3 /* method matches, submethod can't be checked */ +static int list_starts_with(const char *, const char *, const char *); char * auth2_read_banner(void) @@ -122,7 +123,7 @@ auth2_read_banner(void) close(fd); return (NULL); } - if (st.st_size > 1*1024*1024) { + if (st.st_size <= 0 || st.st_size > 1*1024*1024) { close(fd); return (NULL); } @@ -133,7 +134,7 @@ auth2_read_banner(void) close(fd); if (n != len) { - xfree(banner); + free(banner); return (NULL); } banner[n] = '\0'; @@ -159,9 +160,7 @@ userauth_banner(void) { char *banner = NULL; - if (options.banner == NULL || - strcasecmp(options.banner, "none") == 0 || - (datafellows & SSH_BUG_BANNER) != 0) + if (options.banner == NULL || (datafellows & SSH_BUG_BANNER) != 0) return; if ((banner = PRIVSEP(auth2_read_banner())) == NULL) @@ -169,8 +168,7 @@ userauth_banner(void) userauth_send_banner(banner); done: - if (banner) - xfree(banner); + free(banner); } /* @@ -185,7 +183,7 @@ do_authentication2(Authctxt *authctxt) } /*ARGSUSED*/ -static void +static int input_service_request(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -215,11 +213,12 @@ input_service_request(int type, u_int32_t seq, void *ctxt) debug("bad service request %s", service); packet_disconnect("bad service request %s", service); } - xfree(service); + free(service); + return 0; } /*ARGSUSED*/ -static void +static int input_userauth_request(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -264,6 +263,8 @@ input_userauth_request(int type, u_int32_t seq, void *ctxt) if (use_privsep) mm_inform_authserv(service, style); userauth_banner(); + if (auth2_setup_methods_lists(authctxt) != 0) + packet_disconnect("no authentication methods enabled"); } else if (strcmp(user, authctxt->user) != 0 || strcmp(service, authctxt->service) != 0) { packet_disconnect("Change of username or service not allowed: " @@ -272,9 +273,6 @@ input_userauth_request(int type, u_int32_t seq, void *ctxt) } /* reset state */ auth2_challenge_stop(authctxt); -#ifdef JPAKE - auth2_jpake_stop(authctxt); -#endif #ifdef GSSAPI /* XXX move to auth2_gssapi_stop() */ @@ -286,26 +284,31 @@ input_userauth_request(int type, u_int32_t seq, void *ctxt) authctxt->server_caused_failure = 0; /* try to authenticate user */ - m = authmethod_lookup(method); + m = authmethod_lookup(authctxt, method); if (m != NULL && authctxt->failures < options.max_authtries) { debug2("input_userauth_request: try method %s", method); authenticated = m->userauth(authctxt); } - userauth_finish(authctxt, authenticated, method); + userauth_finish(authctxt, authenticated, method, NULL); - xfree(service); - xfree(user); - xfree(method); + free(service); + free(user); + free(method); + return 0; } void -userauth_finish(Authctxt *authctxt, int authenticated, char *method) +userauth_finish(Authctxt *authctxt, int authenticated, const char *method, + const char *submethod) { char *methods; + int partial = 0; if (!authctxt->valid && authenticated) fatal("INTERNAL ERROR: authenticated invalid user %s", authctxt->user); + if (authenticated && authctxt->postponed) + fatal("INTERNAL ERROR: authenticated and postponed"); /* Special handling for root */ if (authenticated && authctxt->pw->pw_uid == 0 && @@ -316,6 +319,19 @@ userauth_finish(Authctxt *authctxt, int authenticated, char *method) #endif } + if (authenticated && options.num_auth_methods != 0) { + if (!auth2_update_methods_lists(authctxt, method, submethod)) { + authenticated = 0; + partial = 1; + } + } + + /* Log before sending the reply */ + auth_log(authctxt, authenticated, partial, method, submethod); + + if (authctxt->postponed) + return; + #ifdef USE_PAM if (options.use_pam && authenticated) { if (!PRIVSEP(do_pam_account())) { @@ -334,17 +350,10 @@ userauth_finish(Authctxt *authctxt, int authenticated, char *method) #ifdef _UNICOS if (authenticated && cray_access_denied(authctxt->user)) { authenticated = 0; - fatal("Access denied for user %s.",authctxt->user); + fatal("Access denied for user %s.", authctxt->user); } #endif /* _UNICOS */ - /* Log before sending the reply */ - auth_log(authctxt, authenticated, method, " ssh2"); - - if (authctxt->postponed) - return; - - /* XXX todo: check if multiple auth methods are needed */ if (authenticated == 1) { /* turn off userauth */ dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &dispatch_protocol_ignore); @@ -356,43 +365,73 @@ userauth_finish(Authctxt *authctxt, int authenticated, char *method) } else { /* Allow initial try of "none" auth without failure penalty */ - if (!authctxt->server_caused_failure && + if (!partial && !authctxt->server_caused_failure && (authctxt->attempt > 1 || strcmp(method, "none") != 0)) authctxt->failures++; if (authctxt->failures >= options.max_authtries) { #ifdef SSH_AUDIT_EVENTS PRIVSEP(audit_event(SSH_LOGIN_EXCEED_MAXTRIES)); #endif - packet_disconnect(AUTH_FAIL_MSG, authctxt->user); + auth_maxtries_exceeded(authctxt); } - methods = authmethods_get(); + methods = authmethods_get(authctxt); + debug3("%s: failure partial=%d next methods=\"%s\"", __func__, + partial, methods); packet_start(SSH2_MSG_USERAUTH_FAILURE); packet_put_cstring(methods); - packet_put_char(0); /* XXX partial success, unused */ + packet_put_char(partial); packet_send(); packet_write_wait(); - xfree(methods); + free(methods); } } +/* + * Checks whether method is allowed by at least one AuthenticationMethods + * methods list. Returns 1 if allowed, or no methods lists configured. + * 0 otherwise. + */ +int +auth2_method_allowed(Authctxt *authctxt, const char *method, + const char *submethod) +{ + u_int i; + + /* + * NB. authctxt->num_auth_methods might be zero as a result of + * auth2_setup_methods_lists(), so check the configuration. + */ + if (options.num_auth_methods == 0) + return 1; + for (i = 0; i < authctxt->num_auth_methods; i++) { + if (list_starts_with(authctxt->auth_methods[i], method, + submethod) != MATCH_NONE) + return 1; + } + return 0; +} + static char * -authmethods_get(void) +authmethods_get(Authctxt *authctxt) { Buffer b; char *list; - int i; + u_int i; buffer_init(&b); for (i = 0; authmethods[i] != NULL; i++) { if (strcmp(authmethods[i]->name, "none") == 0) continue; - if (authmethods[i]->enabled != NULL && - *(authmethods[i]->enabled) != 0) { - if (buffer_len(&b) > 0) - buffer_append(&b, ",", 1); - buffer_append(&b, authmethods[i]->name, - strlen(authmethods[i]->name)); - } + if (authmethods[i]->enabled == NULL || + *(authmethods[i]->enabled) == 0) + continue; + if (!auth2_method_allowed(authctxt, authmethods[i]->name, + NULL)) + continue; + if (buffer_len(&b) > 0) + buffer_append(&b, ",", 1); + buffer_append(&b, authmethods[i]->name, + strlen(authmethods[i]->name)); } buffer_append(&b, "\0", 1); list = xstrdup(buffer_ptr(&b)); @@ -401,7 +440,7 @@ authmethods_get(void) } static Authmethod * -authmethod_lookup(const char *name) +authmethod_lookup(Authctxt *authctxt, const char *name) { int i; @@ -409,9 +448,181 @@ authmethod_lookup(const char *name) for (i = 0; authmethods[i] != NULL; i++) if (authmethods[i]->enabled != NULL && *(authmethods[i]->enabled) != 0 && - strcmp(name, authmethods[i]->name) == 0) + strcmp(name, authmethods[i]->name) == 0 && + auth2_method_allowed(authctxt, + authmethods[i]->name, NULL)) return authmethods[i]; debug2("Unrecognized authentication method name: %s", name ? name : "NULL"); return NULL; } + +/* + * Check a comma-separated list of methods for validity. Is need_enable is + * non-zero, then also require that the methods are enabled. + * Returns 0 on success or -1 if the methods list is invalid. + */ +int +auth2_methods_valid(const char *_methods, int need_enable) +{ + char *methods, *omethods, *method, *p; + u_int i, found; + int ret = -1; + + if (*_methods == '\0') { + error("empty authentication method list"); + return -1; + } + omethods = methods = xstrdup(_methods); + while ((method = strsep(&methods, ",")) != NULL) { + for (found = i = 0; !found && authmethods[i] != NULL; i++) { + if ((p = strchr(method, ':')) != NULL) + *p = '\0'; + if (strcmp(method, authmethods[i]->name) != 0) + continue; + if (need_enable) { + if (authmethods[i]->enabled == NULL || + *(authmethods[i]->enabled) == 0) { + error("Disabled method \"%s\" in " + "AuthenticationMethods list \"%s\"", + method, _methods); + goto out; + } + } + found = 1; + break; + } + if (!found) { + error("Unknown authentication method \"%s\" in list", + method); + goto out; + } + } + ret = 0; + out: + free(omethods); + return ret; +} + +/* + * Prune the AuthenticationMethods supplied in the configuration, removing + * any methods lists that include disabled methods. Note that this might + * leave authctxt->num_auth_methods == 0, even when multiple required auth + * has been requested. For this reason, all tests for whether multiple is + * enabled should consult options.num_auth_methods directly. + */ +int +auth2_setup_methods_lists(Authctxt *authctxt) +{ + u_int i; + + if (options.num_auth_methods == 0) + return 0; + debug3("%s: checking methods", __func__); + authctxt->auth_methods = xcalloc(options.num_auth_methods, + sizeof(*authctxt->auth_methods)); + authctxt->num_auth_methods = 0; + for (i = 0; i < options.num_auth_methods; i++) { + if (auth2_methods_valid(options.auth_methods[i], 1) != 0) { + logit("Authentication methods list \"%s\" contains " + "disabled method, skipping", + options.auth_methods[i]); + continue; + } + debug("authentication methods list %d: %s", + authctxt->num_auth_methods, options.auth_methods[i]); + authctxt->auth_methods[authctxt->num_auth_methods++] = + xstrdup(options.auth_methods[i]); + } + if (authctxt->num_auth_methods == 0) { + error("No AuthenticationMethods left after eliminating " + "disabled methods"); + return -1; + } + return 0; +} + +static int +list_starts_with(const char *methods, const char *method, + const char *submethod) +{ + size_t l = strlen(method); + int match; + const char *p; + + if (strncmp(methods, method, l) != 0) + return MATCH_NONE; + p = methods + l; + match = MATCH_METHOD; + if (*p == ':') { + if (!submethod) + return MATCH_PARTIAL; + l = strlen(submethod); + p += 1; + if (strncmp(submethod, p, l)) + return MATCH_NONE; + p += l; + match = MATCH_BOTH; + } + if (*p != ',' && *p != '\0') + return MATCH_NONE; + return match; +} + +/* + * Remove method from the start of a comma-separated list of methods. + * Returns 0 if the list of methods did not start with that method or 1 + * if it did. + */ +static int +remove_method(char **methods, const char *method, const char *submethod) +{ + char *omethods = *methods, *p; + size_t l = strlen(method); + int match; + + match = list_starts_with(omethods, method, submethod); + if (match != MATCH_METHOD && match != MATCH_BOTH) + return 0; + p = omethods + l; + if (submethod && match == MATCH_BOTH) + p += 1 + strlen(submethod); /* include colon */ + if (*p == ',') + p++; + *methods = xstrdup(p); + free(omethods); + return 1; +} + +/* + * Called after successful authentication. Will remove the successful method + * from the start of each list in which it occurs. If it was the last method + * in any list, then authentication is deemed successful. + * Returns 1 if the method completed any authentication list or 0 otherwise. + */ +int +auth2_update_methods_lists(Authctxt *authctxt, const char *method, + const char *submethod) +{ + u_int i, found = 0; + + debug3("%s: updating methods list after \"%s\"", __func__, method); + for (i = 0; i < authctxt->num_auth_methods; i++) { + if (!remove_method(&(authctxt->auth_methods[i]), method, + submethod)) + continue; + found = 1; + if (*authctxt->auth_methods[i] == '\0') { + debug2("authentication methods list %d complete", i); + return 1; + } + debug3("authentication methods list %d remaining: \"%s\"", + i, authctxt->auth_methods[i]); + } + /* This should not happen, but would be bad if it did */ + if (!found) + fatal("%s: method not in AuthenticationMethods", __func__); + return 0; +} + + diff --git a/authfd.c b/authfd.c index 72e2c94..bc52248 100644 --- a/authfd.c +++ b/authfd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: authfd.c,v 1.86 2011/07/06 18:09:21 tedu Exp $ */ +/* $OpenBSD: authfd.c,v 1.98 2015/07/03 03:43:18 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -41,136 +41,130 @@ #include #include -#include - -#include #include #include #include #include #include #include +#include #include "xmalloc.h" #include "ssh.h" #include "rsa.h" -#include "buffer.h" -#include "key.h" +#include "sshbuf.h" +#include "sshkey.h" #include "authfd.h" #include "cipher.h" -#include "kex.h" #include "compat.h" #include "log.h" #include "atomicio.h" #include "misc.h" +#include "ssherr.h" -static int agent_present = 0; - -/* helper */ -int decode_reply(int type); +#define MAX_AGENT_IDENTITIES 2048 /* Max keys in agent reply */ +#define MAX_AGENT_REPLY_LEN (256 * 1024) /* Max bytes in agent reply */ /* macro to check for "agent failure" message */ #define agent_failed(x) \ - ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ + ((x == SSH_AGENT_FAILURE) || \ + (x == SSH_COM_AGENT2_FAILURE) || \ (x == SSH2_AGENT_FAILURE)) -int -ssh_agent_present(void) +/* Convert success/failure response from agent to a err.h status */ +static int +decode_reply(u_char type) { - int authfd; - - if (agent_present) - return 1; - if ((authfd = ssh_get_authentication_socket()) == -1) + if (agent_failed(type)) + return SSH_ERR_AGENT_FAILURE; + else if (type == SSH_AGENT_SUCCESS) return 0; - else { - ssh_close_authentication_socket(authfd); - return 1; - } + else + return SSH_ERR_INVALID_FORMAT; } /* Returns the number of the authentication fd, or -1 if there is none. */ - int -ssh_get_authentication_socket(void) +ssh_get_authentication_socket(int *fdp) { const char *authsocket; - int sock; + int sock, oerrno; struct sockaddr_un sunaddr; + if (fdp != NULL) + *fdp = -1; + authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); if (!authsocket) - return -1; + return SSH_ERR_AGENT_NOT_PRESENT; - bzero(&sunaddr, sizeof(sunaddr)); + memset(&sunaddr, 0, sizeof(sunaddr)); sunaddr.sun_family = AF_UNIX; strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); - sock = socket(AF_UNIX, SOCK_STREAM, 0); - if (sock < 0) - return -1; + if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) + return SSH_ERR_SYSTEM_ERROR; #ifndef WIN32_FIXME /* close on exec */ - if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1) { + if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1 || + connect(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) { + oerrno = errno; close(sock); - return -1; + errno = oerrno; + return SSH_ERR_SYSTEM_ERROR; } #endif /* #ifndef WIN32_FIXME */ - if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) { + if (fdp != NULL) + *fdp = sock; + else close(sock); - return -1; - } - agent_present = 1; - return sock; + return 0; } +/* Communicate with agent: send request and read reply */ static int -ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) +ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply) { - u_int l, len; + int r; + size_t l, len; char buf[1024]; /* Get the length of the message, and format it in the buffer. */ - len = buffer_len(request); + len = sshbuf_len(request); put_u32(buf, len); /* Send the length and then the packet to the agent. */ - if (atomicio(vwrite, auth->fd, buf, 4) != 4 || - atomicio(vwrite, auth->fd, buffer_ptr(request), - buffer_len(request)) != buffer_len(request)) { - error("Error writing to authentication socket."); - return 0; - } + if (atomicio(vwrite, sock, buf, 4) != 4 || + atomicio(vwrite, sock, (u_char *)sshbuf_ptr(request), + sshbuf_len(request)) != sshbuf_len(request)) + return SSH_ERR_AGENT_COMMUNICATION; /* * Wait for response from the agent. First read the length of the * response packet. */ - if (atomicio(read, auth->fd, buf, 4) != 4) { - error("Error reading response length from authentication socket."); - return 0; - } + if (atomicio(read, sock, buf, 4) != 4) + return SSH_ERR_AGENT_COMMUNICATION; /* Extract the length, and check it for sanity. */ len = get_u32(buf); - if (len > 256 * 1024) - fatal("Authentication response too long: %u", len); + if (len > MAX_AGENT_REPLY_LEN) + return SSH_ERR_INVALID_FORMAT; /* Read the rest of the response in to the buffer. */ - buffer_clear(reply); + sshbuf_reset(reply); while (len > 0) { l = len; if (l > sizeof(buf)) l = sizeof(buf); - if (atomicio(read, auth->fd, buf, l) != l) { - error("Error reading response from authentication socket."); - return 0; - } - buffer_append(reply, buf, l); + if (atomicio(read, sock, buf, l) != l) + return SSH_ERR_AGENT_COMMUNICATION; + if ((r = sshbuf_put(reply, buf, l)) != 0) + return r; len -= l; } - return 1; + return 0; } /* @@ -178,7 +172,6 @@ ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply * obtained). The argument must have been returned by * ssh_get_authentication_socket(). */ - void ssh_close_authentication_socket(int sock) { @@ -186,80 +179,103 @@ ssh_close_authentication_socket(int sock) close(sock); } -/* - * Opens and connects a private socket for communication with the - * authentication agent. Returns the file descriptor (which must be - * shut down and closed by the caller when no longer needed). - * Returns NULL if an error occurred and the connection could not be - * opened. - */ - -AuthenticationConnection * -ssh_get_authentication_connection(void) -{ - AuthenticationConnection *auth; - int sock; - - sock = ssh_get_authentication_socket(); - - /* - * Fail if we couldn't obtain a connection. This happens if we - * exited due to a timeout. - */ - if (sock < 0) - return NULL; - - auth = xmalloc(sizeof(*auth)); - auth->fd = sock; - buffer_init(&auth->identities); - auth->howmany = 0; - - return auth; -} - -/* - * Closes the connection to the authentication agent and frees any associated - * memory. - */ - -void -ssh_close_authentication_connection(AuthenticationConnection *auth) -{ - buffer_free(&auth->identities); - close(auth->fd); - xfree(auth); -} - /* Lock/unlock agent */ int -ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password) +ssh_lock_agent(int sock, int lock, const char *password) { - int type; - Buffer msg; + int r; + u_char type = lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK; + struct sshbuf *msg; - buffer_init(&msg); - buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); - buffer_put_cstring(&msg, password); + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_u8(msg, type)) != 0 || + (r = sshbuf_put_cstring(msg, password)) != 0) + goto out; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; + r = decode_reply(type); + out: + sshbuf_free(msg); + return r; +} - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return 0; +#ifdef WITH_SSH1 +static int +deserialise_identity1(struct sshbuf *ids, struct sshkey **keyp, char **commentp) +{ + struct sshkey *key; + int r, keybits; + u_int32_t bits; + char *comment = NULL; + + if ((key = sshkey_new(KEY_RSA1)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_get_u32(ids, &bits)) != 0 || + (r = sshbuf_get_bignum1(ids, key->rsa->e)) != 0 || + (r = sshbuf_get_bignum1(ids, key->rsa->n)) != 0 || + (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0) + goto out; + keybits = BN_num_bits(key->rsa->n); + /* XXX previously we just warned here. I think we should be strict */ + if (keybits < 0 || bits != (u_int)keybits) { + r = SSH_ERR_KEY_BITS_MISMATCH; + goto out; } - type = buffer_get_char(&msg); - buffer_free(&msg); - return decode_reply(type); + if (keyp != NULL) { + *keyp = key; + key = NULL; + } + if (commentp != NULL) { + *commentp = comment; + comment = NULL; + } + r = 0; + out: + sshkey_free(key); + free(comment); + return r; +} +#endif + +static int +deserialise_identity2(struct sshbuf *ids, struct sshkey **keyp, char **commentp) +{ + int r; + char *comment = NULL; + const u_char *blob; + size_t blen; + + if ((r = sshbuf_get_string_direct(ids, &blob, &blen)) != 0 || + (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0) + goto out; + if ((r = sshkey_from_blob(blob, blen, keyp)) != 0) + goto out; + if (commentp != NULL) { + *commentp = comment; + comment = NULL; + } + r = 0; + out: + free(comment); + return r; } /* - * Returns the first authentication identity held by the agent. + * Fetch list of identities held by the agent. */ - int -ssh_get_num_identities(AuthenticationConnection *auth, int version) +ssh_fetch_identitylist(int sock, int version, struct ssh_identitylist **idlp) { - int type, code1 = 0, code2 = 0; - Buffer request; + u_char type, code1 = 0, code2 = 0; + u_int32_t num, i; + struct sshbuf *msg; + struct ssh_identitylist *idl = NULL; + int r; + /* Determine request and expected response types */ switch (version) { case 1: code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; @@ -270,371 +286,375 @@ ssh_get_num_identities(AuthenticationConnection *auth, int version) code2 = SSH2_AGENT_IDENTITIES_ANSWER; break; default: - return 0; + return SSH_ERR_INVALID_ARGUMENT; } /* * Send a message to the agent requesting for a list of the * identities it can represent. */ - buffer_init(&request); - buffer_put_char(&request, code1); + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_u8(msg, code1)) != 0) + goto out; - buffer_clear(&auth->identities); - if (ssh_request_reply(auth, &request, &auth->identities) == 0) { - buffer_free(&request); - return 0; - } - buffer_free(&request); + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; /* Get message type, and verify that we got a proper answer. */ - type = buffer_get_char(&auth->identities); + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; if (agent_failed(type)) { - return 0; + r = SSH_ERR_AGENT_FAILURE; + goto out; } else if (type != code2) { - fatal("Bad authentication reply message type: %d", type); + r = SSH_ERR_INVALID_FORMAT; + goto out; } /* Get the number of entries in the response and check it for sanity. */ - auth->howmany = buffer_get_int(&auth->identities); - if ((u_int)auth->howmany > 1024) - fatal("Too many identities in authentication reply: %d", - auth->howmany); - - return auth->howmany; -} - -Key * -ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) -{ - /* get number of identities and return the first entry (if any). */ - if (ssh_get_num_identities(auth, version) > 0) - return ssh_get_next_identity(auth, comment, version); - return NULL; -} - -Key * -ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) -{ - int keybits; - u_int bits; - u_char *blob; - u_int blen; - Key *key = NULL; - - /* Return failure if no more entries. */ - if (auth->howmany <= 0) - return NULL; - - /* - * Get the next entry from the packet. These will abort with a fatal - * error if the packet is too short or contains corrupt data. - */ - switch (version) { - case 1: - key = key_new(KEY_RSA1); - bits = buffer_get_int(&auth->identities); - buffer_get_bignum(&auth->identities, key->rsa->e); - buffer_get_bignum(&auth->identities, key->rsa->n); - *comment = buffer_get_string(&auth->identities, NULL); - keybits = BN_num_bits(key->rsa->n); - if (keybits < 0 || bits != (u_int)keybits) - logit("Warning: identity keysize mismatch: actual %d, announced %u", - BN_num_bits(key->rsa->n), bits); - break; - case 2: - blob = buffer_get_string(&auth->identities, &blen); - *comment = buffer_get_string(&auth->identities, NULL); - key = key_from_blob(blob, blen); - xfree(blob); - break; - default: - return NULL; + if ((r = sshbuf_get_u32(msg, &num)) != 0) + goto out; + if (num > MAX_AGENT_IDENTITIES) { + r = SSH_ERR_INVALID_FORMAT; + goto out; } - /* Decrement the number of remaining entries. */ - auth->howmany--; - return key; + if (num == 0) { + r = SSH_ERR_AGENT_NO_IDENTITIES; + goto out; + } + + /* Deserialise the response into a list of keys/comments */ + if ((idl = calloc(1, sizeof(*idl))) == NULL || + (idl->keys = calloc(num, sizeof(*idl->keys))) == NULL || + (idl->comments = calloc(num, sizeof(*idl->comments))) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + for (i = 0; i < num;) { + switch (version) { + case 1: +#ifdef WITH_SSH1 + if ((r = deserialise_identity1(msg, + &(idl->keys[i]), &(idl->comments[i]))) != 0) + goto out; +#endif + break; + case 2: + if ((r = deserialise_identity2(msg, + &(idl->keys[i]), &(idl->comments[i]))) != 0) { + if (r == SSH_ERR_KEY_TYPE_UNKNOWN) { + /* Gracefully skip unknown key types */ + num--; + continue; + } else + goto out; + } + break; + } + i++; + } + idl->nkeys = num; + *idlp = idl; + idl = NULL; + r = 0; + out: + sshbuf_free(msg); + if (idl != NULL) + ssh_free_identitylist(idl); + return r; +} + +void +ssh_free_identitylist(struct ssh_identitylist *idl) +{ + size_t i; + + if (idl == NULL) + return; + for (i = 0; i < idl->nkeys; i++) { + if (idl->keys != NULL) + sshkey_free(idl->keys[i]); + if (idl->comments != NULL) + free(idl->comments[i]); + } + free(idl); } /* - * Generates a random challenge, sends it to the agent, and waits for - * response from the agent. Returns true (non-zero) if the agent gave the - * correct answer, zero otherwise. Response type selects the style of - * response desired, with 0 corresponding to protocol version 1.0 (no longer - * supported) and 1 corresponding to protocol version 1.1. + * Sends a challenge (typically from a server via ssh(1)) to the agent, + * and waits for a response from the agent. + * Returns true (non-zero) if the agent gave the correct answer, zero + * otherwise. */ +#ifdef WITH_SSH1 int -ssh_decrypt_challenge(AuthenticationConnection *auth, - Key* key, BIGNUM *challenge, - u_char session_id[16], - u_int response_type, - u_char response[16]) +ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge, + u_char session_id[16], u_char response[16]) { - Buffer buffer; - int success = 0; - int i; - int type; + struct sshbuf *msg; + int r; + u_char type; if (key->type != KEY_RSA1) - return 0; - if (response_type == 0) { - logit("Compatibility with ssh protocol version 1.0 no longer supported."); - return 0; - } - buffer_init(&buffer); - buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); - buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); - buffer_put_bignum(&buffer, key->rsa->e); - buffer_put_bignum(&buffer, key->rsa->n); - buffer_put_bignum(&buffer, challenge); - buffer_append(&buffer, session_id, 16); - buffer_put_int(&buffer, response_type); - - if (ssh_request_reply(auth, &buffer, &buffer) == 0) { - buffer_free(&buffer); - return 0; - } - type = buffer_get_char(&buffer); - + return SSH_ERR_INVALID_ARGUMENT; + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_u8(msg, SSH_AGENTC_RSA_CHALLENGE)) != 0 || + (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 || + (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 || + (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0 || + (r = sshbuf_put_bignum1(msg, challenge)) != 0 || + (r = sshbuf_put(msg, session_id, 16)) != 0 || + (r = sshbuf_put_u32(msg, 1)) != 0) /* Response type for proto 1.1 */ + goto out; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; if (agent_failed(type)) { - logit("Agent admitted failure to authenticate using the key."); + r = SSH_ERR_AGENT_FAILURE; + goto out; } else if (type != SSH_AGENT_RSA_RESPONSE) { - fatal("Bad authentication response: %d", type); - } else { - success = 1; - /* - * Get the response from the packet. This will abort with a - * fatal error if the packet is corrupt. - */ - for (i = 0; i < 16; i++) - response[i] = (u_char)buffer_get_char(&buffer); + r = SSH_ERR_INVALID_FORMAT; + goto out; } - buffer_free(&buffer); - return success; + if ((r = sshbuf_get(msg, response, 16)) != 0) + goto out; + r = 0; + out: + sshbuf_free(msg); + return r; } +#endif -/* ask agent to sign data, returns -1 on error, 0 on success */ +/* ask agent to sign data, returns err.h code on error, 0 on success */ int -ssh_agent_sign(AuthenticationConnection *auth, - Key *key, - u_char **sigp, u_int *lenp, - u_char *data, u_int datalen) +ssh_agent_sign(int sock, struct sshkey *key, + u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) { - extern int datafellows; - Buffer msg; - u_char *blob; - u_int blen; - int type, flags = 0; - int ret = -1; + struct sshbuf *msg; + u_char *blob = NULL, type; + size_t blen = 0, len = 0; + u_int flags = 0; + int r = SSH_ERR_INTERNAL_ERROR; - if (key_to_blob(key, &blob, &blen) == 0) - return -1; + *sigp = NULL; + *lenp = 0; - if (datafellows & SSH_BUG_SIGBLOB) - flags = SSH_AGENT_OLD_SIGNATURE; - - buffer_init(&msg); - buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); - buffer_put_string(&msg, blob, blen); - buffer_put_string(&msg, data, datalen); - buffer_put_int(&msg, flags); - xfree(blob); - - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return -1; - } - type = buffer_get_char(&msg); + if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE) + return SSH_ERR_INVALID_ARGUMENT; + if (compat & SSH_BUG_SIGBLOB) + flags |= SSH_AGENT_OLD_SIGNATURE; + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) + goto out; + if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 || + (r = sshbuf_put_string(msg, blob, blen)) != 0 || + (r = sshbuf_put_string(msg, data, datalen)) != 0 || + (r = sshbuf_put_u32(msg, flags)) != 0) + goto out; + if ((r = ssh_request_reply(sock, msg, msg) != 0)) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; if (agent_failed(type)) { - logit("Agent admitted failure to sign using the key."); + r = SSH_ERR_AGENT_FAILURE; + goto out; } else if (type != SSH2_AGENT_SIGN_RESPONSE) { - fatal("Bad authentication response: %d", type); - } else { - ret = 0; - *sigp = buffer_get_string(&msg, lenp); + r = SSH_ERR_INVALID_FORMAT; + goto out; } - buffer_free(&msg); - return ret; + if ((r = sshbuf_get_string(msg, sigp, &len)) != 0) + goto out; + *lenp = len; + r = 0; + out: + if (blob != NULL) { + explicit_bzero(blob, blen); + free(blob); + } + sshbuf_free(msg); + return r; } /* Encode key for a message to the agent. */ -static void -ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) +#ifdef WITH_SSH1 +static int +ssh_encode_identity_rsa1(struct sshbuf *b, RSA *key, const char *comment) { - buffer_put_int(b, BN_num_bits(key->n)); - buffer_put_bignum(b, key->n); - buffer_put_bignum(b, key->e); - buffer_put_bignum(b, key->d); + int r; + /* To keep within the protocol: p < q for ssh. in SSL p > q */ - buffer_put_bignum(b, key->iqmp); /* ssh key->u */ - buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ - buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ - buffer_put_cstring(b, comment); + if ((r = sshbuf_put_u32(b, BN_num_bits(key->n))) != 0 || + (r = sshbuf_put_bignum1(b, key->n)) != 0 || + (r = sshbuf_put_bignum1(b, key->e)) != 0 || + (r = sshbuf_put_bignum1(b, key->d)) != 0 || + (r = sshbuf_put_bignum1(b, key->iqmp)) != 0 || + (r = sshbuf_put_bignum1(b, key->q)) != 0 || + (r = sshbuf_put_bignum1(b, key->p)) != 0 || + (r = sshbuf_put_cstring(b, comment)) != 0) + return r; + return 0; +} +#endif + +static int +ssh_encode_identity_ssh2(struct sshbuf *b, struct sshkey *key, + const char *comment) +{ + int r; + + if ((r = sshkey_private_serialize(key, b)) != 0 || + (r = sshbuf_put_cstring(b, comment)) != 0) + return r; + return 0; } -static void -ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) +static int +encode_constraints(struct sshbuf *m, u_int life, u_int confirm) { - buffer_put_cstring(b, key_ssh_name(key)); - switch (key->type) { - case KEY_RSA: - buffer_put_bignum2(b, key->rsa->n); - buffer_put_bignum2(b, key->rsa->e); - buffer_put_bignum2(b, key->rsa->d); - buffer_put_bignum2(b, key->rsa->iqmp); - buffer_put_bignum2(b, key->rsa->p); - buffer_put_bignum2(b, key->rsa->q); - break; - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) - fatal("%s: no cert/certblob", __func__); - buffer_put_string(b, buffer_ptr(&key->cert->certblob), - buffer_len(&key->cert->certblob)); - buffer_put_bignum2(b, key->rsa->d); - buffer_put_bignum2(b, key->rsa->iqmp); - buffer_put_bignum2(b, key->rsa->p); - buffer_put_bignum2(b, key->rsa->q); - break; - case KEY_DSA: - buffer_put_bignum2(b, key->dsa->p); - buffer_put_bignum2(b, key->dsa->q); - buffer_put_bignum2(b, key->dsa->g); - buffer_put_bignum2(b, key->dsa->pub_key); - buffer_put_bignum2(b, key->dsa->priv_key); - break; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) - fatal("%s: no cert/certblob", __func__); - buffer_put_string(b, buffer_ptr(&key->cert->certblob), - buffer_len(&key->cert->certblob)); - buffer_put_bignum2(b, key->dsa->priv_key); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - buffer_put_cstring(b, key_curve_nid_to_name(key->ecdsa_nid)); - buffer_put_ecpoint(b, EC_KEY_get0_group(key->ecdsa), - EC_KEY_get0_public_key(key->ecdsa)); - buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa)); - break; - case KEY_ECDSA_CERT: - if (key->cert == NULL || buffer_len(&key->cert->certblob) == 0) - fatal("%s: no cert/certblob", __func__); - buffer_put_string(b, buffer_ptr(&key->cert->certblob), - buffer_len(&key->cert->certblob)); - buffer_put_bignum2(b, EC_KEY_get0_private_key(key->ecdsa)); - break; -#endif + int r; + + if (life != 0) { + if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_LIFETIME)) != 0 || + (r = sshbuf_put_u32(m, life)) != 0) + goto out; } - buffer_put_cstring(b, comment); + if (confirm != 0) { + if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_CONFIRM)) != 0) + goto out; + } + r = 0; + out: + return r; } /* - * Adds an identity to the authentication server. This call is not meant to - * be used by normal applications. + * Adds an identity to the authentication server. + * This call is intended only for use by ssh-add(1) and like applications. */ - int -ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key, - const char *comment, u_int life, u_int confirm) +ssh_add_identity_constrained(int sock, struct sshkey *key, const char *comment, + u_int life, u_int confirm) { - Buffer msg; - int type, constrained = (life || confirm); + struct sshbuf *msg; + int r, constrained = (life || confirm); + u_char type; - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; switch (key->type) { +#ifdef WITH_SSH1 case KEY_RSA1: type = constrained ? SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : SSH_AGENTC_ADD_RSA_IDENTITY; - buffer_put_char(&msg, type); - ssh_encode_identity_rsa1(&msg, key->rsa, comment); + if ((r = sshbuf_put_u8(msg, type)) != 0 || + (r = ssh_encode_identity_rsa1(msg, key->rsa, comment)) != 0) + goto out; break; +#endif +#ifdef WITH_OPENSSL case KEY_RSA: case KEY_RSA_CERT: - case KEY_RSA_CERT_V00: case KEY_DSA: case KEY_DSA_CERT: - case KEY_DSA_CERT_V00: case KEY_ECDSA: case KEY_ECDSA_CERT: +#endif + case KEY_ED25519: + case KEY_ED25519_CERT: type = constrained ? SSH2_AGENTC_ADD_ID_CONSTRAINED : SSH2_AGENTC_ADD_IDENTITY; - buffer_put_char(&msg, type); - ssh_encode_identity_ssh2(&msg, key, comment); + if ((r = sshbuf_put_u8(msg, type)) != 0 || + (r = ssh_encode_identity_ssh2(msg, key, comment)) != 0) + goto out; break; default: - buffer_free(&msg); - return 0; + r = SSH_ERR_INVALID_ARGUMENT; + goto out; } - if (constrained) { - if (life != 0) { - buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); - buffer_put_int(&msg, life); - } - if (confirm != 0) - buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); - } - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return 0; - } - type = buffer_get_char(&msg); - buffer_free(&msg); - return decode_reply(type); + if (constrained && + (r = encode_constraints(msg, life, confirm)) != 0) + goto out; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; + r = decode_reply(type); + out: + sshbuf_free(msg); + return r; } /* - * Removes an identity from the authentication server. This call is not - * meant to be used by normal applications. + * Removes an identity from the authentication server. + * This call is intended only for use by ssh-add(1) and like applications. */ - int -ssh_remove_identity(AuthenticationConnection *auth, Key *key) +ssh_remove_identity(int sock, struct sshkey *key) { - Buffer msg; - int type; - u_char *blob; - u_int blen; + struct sshbuf *msg; + int r; + u_char type, *blob = NULL; + size_t blen; - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; +#ifdef WITH_SSH1 if (key->type == KEY_RSA1) { - buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); - buffer_put_int(&msg, BN_num_bits(key->rsa->n)); - buffer_put_bignum(&msg, key->rsa->e); - buffer_put_bignum(&msg, key->rsa->n); - } else if (key_type_plain(key->type) == KEY_DSA || - key_type_plain(key->type) == KEY_RSA || - key_type_plain(key->type) == KEY_ECDSA) { - key_to_blob(key, &blob, &blen); - buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); - buffer_put_string(&msg, blob, blen); - xfree(blob); + if ((r = sshbuf_put_u8(msg, + SSH_AGENTC_REMOVE_RSA_IDENTITY)) != 0 || + (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 || + (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 || + (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0) + goto out; + } else +#endif + if (key->type != KEY_UNSPEC) { + if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) + goto out; + if ((r = sshbuf_put_u8(msg, + SSH2_AGENTC_REMOVE_IDENTITY)) != 0 || + (r = sshbuf_put_string(msg, blob, blen)) != 0) + goto out; } else { - buffer_free(&msg); - return 0; + r = SSH_ERR_INVALID_ARGUMENT; + goto out; } - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return 0; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; + r = decode_reply(type); + out: + if (blob != NULL) { + explicit_bzero(blob, blen); + free(blob); } - type = buffer_get_char(&msg); - buffer_free(&msg); - return decode_reply(type); + sshbuf_free(msg); + return r; } +/* + * Add/remove an token-based identity from the authentication server. + * This call is intended only for use by ssh-add(1) and like applications. + */ int -ssh_update_card(AuthenticationConnection *auth, int add, - const char *reader_id, const char *pin, u_int life, u_int confirm) +ssh_update_card(int sock, int add, const char *reader_id, const char *pin, + u_int life, u_int confirm) { - Buffer msg; - int type, constrained = (life || confirm); + struct sshbuf *msg; + int r, constrained = (life || confirm); + u_char type; if (add) { type = constrained ? @@ -643,69 +663,48 @@ ssh_update_card(AuthenticationConnection *auth, int add, } else type = SSH_AGENTC_REMOVE_SMARTCARD_KEY; - buffer_init(&msg); - buffer_put_char(&msg, type); - buffer_put_cstring(&msg, reader_id); - buffer_put_cstring(&msg, pin); - - if (constrained) { - if (life != 0) { - buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); - buffer_put_int(&msg, life); - } - if (confirm != 0) - buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); - } - - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return 0; - } - type = buffer_get_char(&msg); - buffer_free(&msg); - return decode_reply(type); + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_u8(msg, type)) != 0 || + (r = sshbuf_put_cstring(msg, reader_id)) != 0 || + (r = sshbuf_put_cstring(msg, pin)) != 0) + goto out; + if (constrained && + (r = encode_constraints(msg, life, confirm)) != 0) + goto out; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; + r = decode_reply(type); + out: + sshbuf_free(msg); + return r; } /* - * Removes all identities from the agent. This call is not meant to be used - * by normal applications. + * Removes all identities from the agent. + * This call is intended only for use by ssh-add(1) and like applications. */ - int -ssh_remove_all_identities(AuthenticationConnection *auth, int version) +ssh_remove_all_identities(int sock, int version) { - Buffer msg; - int type; - int code = (version==1) ? - SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : - SSH2_AGENTC_REMOVE_ALL_IDENTITIES; + struct sshbuf *msg; + u_char type = (version == 1) ? + SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES : + SSH2_AGENTC_REMOVE_ALL_IDENTITIES; + int r; - buffer_init(&msg); - buffer_put_char(&msg, code); - - if (ssh_request_reply(auth, &msg, &msg) == 0) { - buffer_free(&msg); - return 0; - } - type = buffer_get_char(&msg); - buffer_free(&msg); - return decode_reply(type); -} - -int -decode_reply(int type) -{ - switch (type) { - case SSH_AGENT_FAILURE: - case SSH_COM_AGENT2_FAILURE: - case SSH2_AGENT_FAILURE: - logit("SSH_AGENT_FAILURE"); - return 0; - case SSH_AGENT_SUCCESS: - return 1; - default: - fatal("Bad response from authentication agent: %d", type); - } - /* NOTREACHED */ - return 0; + if ((msg = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_u8(msg, type)) != 0) + goto out; + if ((r = ssh_request_reply(sock, msg, msg)) != 0) + goto out; + if ((r = sshbuf_get_u8(msg, &type)) != 0) + goto out; + r = decode_reply(type); + out: + sshbuf_free(msg); + return r; } diff --git a/authfd.h b/authfd.h index 2582a27..bea20c2 100644 --- a/authfd.h +++ b/authfd.h @@ -1,4 +1,4 @@ -/* $OpenBSD: authfd.h,v 1.37 2009/08/27 17:44:52 djm Exp $ */ +/* $OpenBSD: authfd.h,v 1.38 2015/01/14 20:05:27 djm Exp $ */ /* * Author: Tatu Ylonen @@ -16,6 +16,33 @@ #ifndef AUTHFD_H #define AUTHFD_H +/* List of identities returned by ssh_fetch_identitylist() */ +struct ssh_identitylist { + size_t nkeys; + struct sshkey **keys; + char **comments; +}; + +int ssh_get_authentication_socket(int *fdp); +void ssh_close_authentication_socket(int sock); + +int ssh_lock_agent(int sock, int lock, const char *password); +int ssh_fetch_identitylist(int sock, int version, + struct ssh_identitylist **idlp); +void ssh_free_identitylist(struct ssh_identitylist *idl); +int ssh_add_identity_constrained(int sock, struct sshkey *key, + const char *comment, u_int life, u_int confirm); +int ssh_remove_identity(int sock, struct sshkey *key); +int ssh_update_card(int sock, int add, const char *reader_id, + const char *pin, u_int life, u_int confirm); +int ssh_remove_all_identities(int sock, int version); + +int ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge, + u_char session_id[16], u_char response[16]); +int ssh_agent_sign(int sock, struct sshkey *key, + u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat); + /* Messages for the authentication agent connection. */ #define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1 #define SSH_AGENT_RSA_IDENTITIES_ANSWER 2 @@ -60,35 +87,4 @@ #define SSH_AGENT_OLD_SIGNATURE 0x01 -typedef struct { - int fd; - Buffer identities; - int howmany; -} AuthenticationConnection; - -int ssh_agent_present(void); -int ssh_get_authentication_socket(void); -void ssh_close_authentication_socket(int); - -AuthenticationConnection *ssh_get_authentication_connection(void); -void ssh_close_authentication_connection(AuthenticationConnection *); -int ssh_get_num_identities(AuthenticationConnection *, int); -Key *ssh_get_first_identity(AuthenticationConnection *, char **, int); -Key *ssh_get_next_identity(AuthenticationConnection *, char **, int); -int ssh_add_identity_constrained(AuthenticationConnection *, Key *, - const char *, u_int, u_int); -int ssh_remove_identity(AuthenticationConnection *, Key *); -int ssh_remove_all_identities(AuthenticationConnection *, int); -int ssh_lock_agent(AuthenticationConnection *, int, const char *); -int ssh_update_card(AuthenticationConnection *, int, const char *, - const char *, u_int, u_int); - -int -ssh_decrypt_challenge(AuthenticationConnection *, Key *, BIGNUM *, u_char[16], - u_int, u_char[16]); - -int -ssh_agent_sign(AuthenticationConnection *, Key *, u_char **, u_int *, u_char *, - u_int); - #endif /* AUTHFD_H */ diff --git a/authfile.c b/authfile.c index 8c8507b..0c5c9da 100644 --- a/authfile.c +++ b/authfile.c @@ -1,19 +1,6 @@ -/* $OpenBSD: authfile.c,v 1.92 2011/06/14 22:49:18 markus Exp $ */ +/* $OpenBSD: authfile.c,v 1.116 2015/07/09 09:49:46 markus Exp $ */ /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved - * This file contains functions for reading and writing identity files, and - * for reading the passphrase from the user. - * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". - * - * - * Copyright (c) 2000 Markus Friedl. All rights reserved. + * Copyright (c) 2000, 2013 Markus Friedl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -40,583 +27,153 @@ #include #include -#include #include -#include -#include -#include - -/* compatibility with old or broken OpenSSL versions */ -#include "openbsd-compat/openssl-compat.h" - #include #include -#include #include +#include #include #include #include +#include -#include "xmalloc.h" #include "cipher.h" -#include "buffer.h" -#include "key.h" #include "ssh.h" #include "log.h" #include "authfile.h" #include "rsa.h" #include "misc.h" #include "atomicio.h" +#include "sshkey.h" +#include "sshbuf.h" +#include "ssherr.h" +#include "krl.h" #define MAX_KEY_FILE_SIZE (1024 * 1024) -/* Version identification string for SSH v1 identity files. */ -static const char authfile_id_string[] = - "SSH PRIVATE KEY FILE FORMAT 1.1\n"; - -/* - * Serialises the authentication (private) key to a blob, encrypting it with - * passphrase. The identification of the blob (lowest 64 bits of n) will - * precede the key to provide identification of the key without needing a - * passphrase. - */ -static int -key_private_rsa1_to_blob(Key *key, Buffer *blob, const char *passphrase, - const char *comment) -{ - Buffer buffer, encrypted; - u_char buf[100], *cp; - int i, cipher_num; - CipherContext ciphercontext; - Cipher *cipher; - u_int32_t rnd; - - /* - * If the passphrase is empty, use SSH_CIPHER_NONE to ease converting - * to another cipher; otherwise use SSH_AUTHFILE_CIPHER. - */ - cipher_num = (strcmp(passphrase, "") == 0) ? - SSH_CIPHER_NONE : SSH_AUTHFILE_CIPHER; - if ((cipher = cipher_by_number(cipher_num)) == NULL) - fatal("save_private_key_rsa: bad cipher"); - - /* This buffer is used to built the secret part of the private key. */ - buffer_init(&buffer); - - /* Put checkbytes for checking passphrase validity. */ - rnd = arc4random(); - buf[0] = rnd & 0xff; - buf[1] = (rnd >> 8) & 0xff; - buf[2] = buf[0]; - buf[3] = buf[1]; - buffer_append(&buffer, buf, 4); - - /* - * Store the private key (n and e will not be stored because they - * will be stored in plain text, and storing them also in encrypted - * format would just give known plaintext). - */ - buffer_put_bignum(&buffer, key->rsa->d); - buffer_put_bignum(&buffer, key->rsa->iqmp); - buffer_put_bignum(&buffer, key->rsa->q); /* reverse from SSL p */ - buffer_put_bignum(&buffer, key->rsa->p); /* reverse from SSL q */ - - /* Pad the part to be encrypted until its size is a multiple of 8. */ - while (buffer_len(&buffer) % 8 != 0) - buffer_put_char(&buffer, 0); - - /* This buffer will be used to contain the data in the file. */ - buffer_init(&encrypted); - - /* First store keyfile id string. */ - for (i = 0; authfile_id_string[i]; i++) - buffer_put_char(&encrypted, authfile_id_string[i]); - buffer_put_char(&encrypted, 0); - - /* Store cipher type. */ - buffer_put_char(&encrypted, cipher_num); - buffer_put_int(&encrypted, 0); /* For future extension */ - - /* Store public key. This will be in plain text. */ - buffer_put_int(&encrypted, BN_num_bits(key->rsa->n)); - buffer_put_bignum(&encrypted, key->rsa->n); - buffer_put_bignum(&encrypted, key->rsa->e); - buffer_put_cstring(&encrypted, comment); - - /* Allocate space for the private part of the key in the buffer. */ - cp = buffer_append_space(&encrypted, buffer_len(&buffer)); - - cipher_set_key_string(&ciphercontext, cipher, passphrase, - CIPHER_ENCRYPT); - cipher_crypt(&ciphercontext, cp, - buffer_ptr(&buffer), buffer_len(&buffer)); - cipher_cleanup(&ciphercontext); - memset(&ciphercontext, 0, sizeof(ciphercontext)); - - /* Destroy temporary data. */ - memset(buf, 0, sizeof(buf)); - buffer_free(&buffer); - - buffer_append(blob, buffer_ptr(&encrypted), buffer_len(&encrypted)); - buffer_free(&encrypted); - - return 1; -} - -/* convert SSH v2 key in OpenSSL PEM format */ -static int -key_private_pem_to_blob(Key *key, Buffer *blob, const char *_passphrase, - const char *comment) -{ - int success = 0; - int blen, len = strlen(_passphrase); - u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL; -#if (OPENSSL_VERSION_NUMBER < 0x00907000L) - const EVP_CIPHER *cipher = (len > 0) ? EVP_des_ede3_cbc() : NULL; -#else - const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL; -#endif - const u_char *bptr; - BIO *bio; - - if (len > 0 && len <= 4) { - error("passphrase too short: have %d bytes, need > 4", len); - return 0; - } - if ((bio = BIO_new(BIO_s_mem())) == NULL) { - error("%s: BIO_new failed", __func__); - return 0; - } - switch (key->type) { - case KEY_DSA: - success = PEM_write_bio_DSAPrivateKey(bio, key->dsa, - cipher, passphrase, len, NULL, NULL); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa, - cipher, passphrase, len, NULL, NULL); - break; -#endif - case KEY_RSA: - success = PEM_write_bio_RSAPrivateKey(bio, key->rsa, - cipher, passphrase, len, NULL, NULL); - break; - } - if (success) { - if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) - success = 0; - else - buffer_append(blob, bptr, blen); - } - BIO_free(bio); - return success; -} - /* Save a key blob to a file */ static int -key_save_private_blob(Buffer *keybuf, const char *filename) +sshkey_save_private_blob(struct sshbuf *keybuf, const char *filename) { - int fd; - if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) { - error("open %s failed: %s.", filename, strerror(errno)); - return 0; - } - if (atomicio(vwrite, fd, buffer_ptr(keybuf), - buffer_len(keybuf)) != buffer_len(keybuf)) { - error("write to key file %s failed: %s", filename, - strerror(errno)); + int fd, oerrno; + + if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) + return SSH_ERR_SYSTEM_ERROR; + if (atomicio(vwrite, fd, (u_char *)sshbuf_ptr(keybuf), + sshbuf_len(keybuf)) != sshbuf_len(keybuf)) { + oerrno = errno; close(fd); unlink(filename); - return 0; + errno = oerrno; + return SSH_ERR_SYSTEM_ERROR; } close(fd); - return 1; -} - -/* Serialise "key" to buffer "blob" */ -static int -key_private_to_blob(Key *key, Buffer *blob, const char *passphrase, - const char *comment) -{ - switch (key->type) { - case KEY_RSA1: - return key_private_rsa1_to_blob(key, blob, passphrase, comment); - case KEY_DSA: - case KEY_ECDSA: - case KEY_RSA: - return key_private_pem_to_blob(key, blob, passphrase, comment); - default: - error("%s: cannot save key type %d", __func__, key->type); - return 0; - } + return 0; } int -key_save_private(Key *key, const char *filename, const char *passphrase, - const char *comment) +sshkey_save_private(struct sshkey *key, const char *filename, + const char *passphrase, const char *comment, + int force_new_format, const char *new_format_cipher, int new_format_rounds) { - Buffer keyblob; - int success = 0; + struct sshbuf *keyblob = NULL; + int r; - buffer_init(&keyblob); - if (!key_private_to_blob(key, &keyblob, passphrase, comment)) + if ((keyblob = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_private_to_fileblob(key, keyblob, passphrase, comment, + force_new_format, new_format_cipher, new_format_rounds)) != 0) goto out; - if (!key_save_private_blob(&keyblob, filename)) + if ((r = sshkey_save_private_blob(keyblob, filename)) != 0) goto out; - success = 1; + r = 0; out: - buffer_free(&keyblob); - return success; -} - -/* - * Parse the public, unencrypted portion of a RSA1 key. - */ -static Key * -key_parse_public_rsa1(Buffer *blob, char **commentp) -{ - Key *pub; - Buffer copy; - - /* Check that it is at least big enough to contain the ID string. */ - if (buffer_len(blob) < sizeof(authfile_id_string)) { - debug3("Truncated RSA1 identifier"); - return NULL; - } - - /* - * Make sure it begins with the id string. Consume the id string - * from the buffer. - */ - if (memcmp(buffer_ptr(blob), authfile_id_string, - sizeof(authfile_id_string)) != 0) { - debug3("Incorrect RSA1 identifier"); - return NULL; - } - buffer_init(©); - buffer_append(©, buffer_ptr(blob), buffer_len(blob)); - buffer_consume(©, sizeof(authfile_id_string)); - - /* Skip cipher type and reserved data. */ - (void) buffer_get_char(©); /* cipher type */ - (void) buffer_get_int(©); /* reserved */ - - /* Read the public key from the buffer. */ - (void) buffer_get_int(©); - pub = key_new(KEY_RSA1); - buffer_get_bignum(©, pub->rsa->n); - buffer_get_bignum(©, pub->rsa->e); - if (commentp) - *commentp = buffer_get_string(©, NULL); - /* The encrypted private part is not parsed by this function. */ - buffer_free(©); - - return pub; + sshbuf_free(keyblob); + return r; } /* Load a key from a fd into a buffer */ int -key_load_file(int fd, const char *filename, Buffer *blob) +sshkey_load_file(int fd, struct sshbuf *blob) { u_char buf[1024]; size_t len; struct stat st; + int r; - if (fstat(fd, &st) < 0) { - error("%s: fstat of key file %.200s%sfailed: %.100s", __func__, - filename == NULL ? "" : filename, - filename == NULL ? "" : " ", - strerror(errno)); - return 0; - } + if (fstat(fd, &st) < 0) + return SSH_ERR_SYSTEM_ERROR; if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 && - st.st_size > MAX_KEY_FILE_SIZE) { - toobig: - error("%s: key file %.200s%stoo large", __func__, - filename == NULL ? "" : filename, - filename == NULL ? "" : " "); - return 0; - } - buffer_init(blob); + st.st_size > MAX_KEY_FILE_SIZE) + return SSH_ERR_INVALID_FORMAT; for (;;) { if ((len = atomicio(read, fd, buf, sizeof(buf))) == 0) { if (errno == EPIPE) break; - debug("%s: read from key file %.200s%sfailed: %.100s", - __func__, filename == NULL ? "" : filename, - filename == NULL ? "" : " ", strerror(errno)); - buffer_clear(blob); - bzero(buf, sizeof(buf)); - return 0; + r = SSH_ERR_SYSTEM_ERROR; + goto out; } - buffer_append(blob, buf, len); - if (buffer_len(blob) > MAX_KEY_FILE_SIZE) { - buffer_clear(blob); - bzero(buf, sizeof(buf)); - goto toobig; + if ((r = sshbuf_put(blob, buf, len)) != 0) + goto out; + if (sshbuf_len(blob) > MAX_KEY_FILE_SIZE) { + r = SSH_ERR_INVALID_FORMAT; + goto out; } } - bzero(buf, sizeof(buf)); #ifndef WIN32_FIXME if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 && - st.st_size != buffer_len(blob)) { - debug("%s: key file %.200s%schanged size while reading", - __func__, filename == NULL ? "" : filename, - filename == NULL ? "" : " "); - buffer_clear(blob); - return 0; + st.st_size != (off_t)sshbuf_len(blob)) { + r = SSH_ERR_FILE_CHANGED; + goto out; } #endif + r = 0; - return 1; + out: + explicit_bzero(buf, sizeof(buf)); + if (r != 0) + sshbuf_reset(blob); + return r; } +#ifdef WITH_SSH1 /* * Loads the public part of the ssh v1 key file. Returns NULL if an error was * encountered (the file does not exist or is not readable), and the key * otherwise. */ -static Key * -key_load_public_rsa1(int fd, const char *filename, char **commentp) +static int +sshkey_load_public_rsa1(int fd, struct sshkey **keyp, char **commentp) { - Buffer buffer; - Key *pub; + struct sshbuf *b = NULL; + int r; - buffer_init(&buffer); - if (!key_load_file(fd, filename, &buffer)) { - buffer_free(&buffer); - return NULL; - } + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; - pub = key_parse_public_rsa1(&buffer, commentp); - if (pub == NULL) - debug3("Could not load \"%s\" as a RSA1 public key", filename); - buffer_free(&buffer); - return pub; -} - -/* load public key from private-key file, works only for SSH v1 */ -Key * -key_load_public_type(int type, const char *filename, char **commentp) -{ - Key *pub; - int fd; - - if (type == KEY_RSA1) { - fd = open(filename, O_RDONLY); - if (fd < 0) - return NULL; - pub = key_load_public_rsa1(fd, filename, commentp); - close(fd); - return pub; - } - return NULL; -} - -static Key * -key_parse_private_rsa1(Buffer *blob, const char *passphrase, char **commentp) -{ - int check1, check2, cipher_type; - Buffer decrypted; - u_char *cp; - CipherContext ciphercontext; - Cipher *cipher; - Key *prv = NULL; - Buffer copy; - - /* Check that it is at least big enough to contain the ID string. */ - if (buffer_len(blob) < sizeof(authfile_id_string)) { - debug3("Truncated RSA1 identifier"); - return NULL; - } - - /* - * Make sure it begins with the id string. Consume the id string - * from the buffer. - */ - if (memcmp(buffer_ptr(blob), authfile_id_string, - sizeof(authfile_id_string)) != 0) { - debug3("Incorrect RSA1 identifier"); - return NULL; - } - buffer_init(©); - buffer_append(©, buffer_ptr(blob), buffer_len(blob)); - buffer_consume(©, sizeof(authfile_id_string)); - - /* Read cipher type. */ - cipher_type = buffer_get_char(©); - (void) buffer_get_int(©); /* Reserved data. */ - - /* Read the public key from the buffer. */ - (void) buffer_get_int(©); - prv = key_new_private(KEY_RSA1); - - buffer_get_bignum(©, prv->rsa->n); - buffer_get_bignum(©, prv->rsa->e); - if (commentp) - *commentp = buffer_get_string(©, NULL); - else - (void)buffer_get_string_ptr(©, NULL); - - /* Check that it is a supported cipher. */ - cipher = cipher_by_number(cipher_type); - if (cipher == NULL) { - debug("Unsupported RSA1 cipher %d", cipher_type); - buffer_free(©); - goto fail; - } - /* Initialize space for decrypted data. */ - buffer_init(&decrypted); - cp = buffer_append_space(&decrypted, buffer_len(©)); - - /* Rest of the buffer is encrypted. Decrypt it using the passphrase. */ - cipher_set_key_string(&ciphercontext, cipher, passphrase, - CIPHER_DECRYPT); - cipher_crypt(&ciphercontext, cp, - buffer_ptr(©), buffer_len(©)); - cipher_cleanup(&ciphercontext); - memset(&ciphercontext, 0, sizeof(ciphercontext)); - buffer_free(©); - - check1 = buffer_get_char(&decrypted); - check2 = buffer_get_char(&decrypted); - if (check1 != buffer_get_char(&decrypted) || - check2 != buffer_get_char(&decrypted)) { - if (strcmp(passphrase, "") != 0) - debug("Bad passphrase supplied for RSA1 key"); - /* Bad passphrase. */ - buffer_free(&decrypted); - goto fail; - } - /* Read the rest of the private key. */ - buffer_get_bignum(&decrypted, prv->rsa->d); - buffer_get_bignum(&decrypted, prv->rsa->iqmp); /* u */ - /* in SSL and SSH v1 p and q are exchanged */ - buffer_get_bignum(&decrypted, prv->rsa->q); /* p */ - buffer_get_bignum(&decrypted, prv->rsa->p); /* q */ - - /* calculate p-1 and q-1 */ - rsa_generate_additional_parameters(prv->rsa); - - buffer_free(&decrypted); - - /* enable blinding */ - if (RSA_blinding_on(prv->rsa, NULL) != 1) { - error("%s: RSA_blinding_on failed", __func__); - goto fail; - } - return prv; - -fail: - if (commentp) - xfree(*commentp); - key_free(prv); - return NULL; -} - -static Key * -key_parse_private_pem(Buffer *blob, int type, const char *passphrase, - char **commentp) -{ - EVP_PKEY *pk = NULL; - Key *prv = NULL; - char *name = ""; - BIO *bio; - - if ((bio = BIO_new_mem_buf(buffer_ptr(blob), - buffer_len(blob))) == NULL) { - error("%s: BIO_new_mem_buf failed", __func__); - return NULL; - } - - pk = PEM_read_bio_PrivateKey(bio, NULL, NULL, (char *)passphrase); - BIO_free(bio); - if (pk == NULL) { - debug("%s: PEM_read_PrivateKey failed", __func__); - (void)ERR_get_error(); - } else if (pk->type == EVP_PKEY_RSA && - (type == KEY_UNSPEC||type==KEY_RSA)) { - prv = key_new(KEY_UNSPEC); - prv->rsa = EVP_PKEY_get1_RSA(pk); - prv->type = KEY_RSA; - name = "rsa w/o comment"; -#ifdef DEBUG_PK - RSA_print_fp(stderr, prv->rsa, 8); -#endif - if (RSA_blinding_on(prv->rsa, NULL) != 1) { - error("%s: RSA_blinding_on failed", __func__); - key_free(prv); - prv = NULL; - } - } else if (pk->type == EVP_PKEY_DSA && - (type == KEY_UNSPEC||type==KEY_DSA)) { - prv = key_new(KEY_UNSPEC); - prv->dsa = EVP_PKEY_get1_DSA(pk); - prv->type = KEY_DSA; - name = "dsa w/o comment"; -#ifdef DEBUG_PK - DSA_print_fp(stderr, prv->dsa, 8); -#endif -#ifdef OPENSSL_HAS_ECC - } else if (pk->type == EVP_PKEY_EC && - (type == KEY_UNSPEC||type==KEY_ECDSA)) { - prv = key_new(KEY_UNSPEC); - prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk); - prv->type = KEY_ECDSA; - if ((prv->ecdsa_nid = key_ecdsa_key_to_nid(prv->ecdsa)) == -1 || - key_curve_nid_to_name(prv->ecdsa_nid) == NULL || - key_ec_validate_public(EC_KEY_get0_group(prv->ecdsa), - EC_KEY_get0_public_key(prv->ecdsa)) != 0 || - key_ec_validate_private(prv->ecdsa) != 0) { - error("%s: bad ECDSA key", __func__); - key_free(prv); - prv = NULL; - } - name = "ecdsa w/o comment"; -#ifdef DEBUG_PK - if (prv != NULL && prv->ecdsa != NULL) - key_dump_ec_key(prv->ecdsa); -#endif -#endif /* OPENSSL_HAS_ECC */ - } else { - error("%s: PEM_read_PrivateKey: mismatch or " - "unknown EVP_PKEY save_type %d", __func__, pk->save_type); - } - if (pk != NULL) - EVP_PKEY_free(pk); - if (prv != NULL && commentp) - *commentp = xstrdup(name); - debug("read PEM private key done: type %s", - prv ? key_type(prv) : ""); - return prv; -} - -Key * -key_load_private_pem(int fd, int type, const char *passphrase, - char **commentp) -{ - Buffer buffer; - Key *prv; - - buffer_init(&buffer); - if (!key_load_file(fd, NULL, &buffer)) { - buffer_free(&buffer); - return NULL; - } - prv = key_parse_private_pem(&buffer, type, passphrase, commentp); - buffer_free(&buffer); - return prv; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_load_file(fd, b)) != 0) + goto out; + if ((r = sshkey_parse_public_rsa1_fileblob(b, keyp, commentp)) != 0) + goto out; + r = 0; + out: + sshbuf_free(b); + return r; } +#endif /* WITH_SSH1 */ +/* XXX remove error() calls from here? */ int -key_perm_ok(int fd, const char *filename) +sshkey_perm_ok(int fd, const char *filename) { struct stat st; if (fstat(fd, &st) < 0) - return 0; + return SSH_ERR_SYSTEM_ERROR; /* * if a key owned by the user is accessed, then we check the * permissions of the file. if the key owned by a different user, @@ -625,6 +182,7 @@ key_perm_ok(int fd, const char *filename) #ifdef HAVE_CYGWIN if (check_ntsec(filename)) #endif + #ifndef WIN32_FIXME if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) { error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); @@ -634,294 +192,331 @@ key_perm_ok(int fd, const char *filename) (u_int)st.st_mode & 0777, filename); error("It is required that your private key files are NOT accessible by others."); error("This private key will be ignored."); - return 0; + return SSH_ERR_KEY_BAD_PERMISSIONS; } #endif /* ifndef WIN32_FIXME */ - return 1; + return 0; } -static Key * -key_parse_private_type(Buffer *blob, int type, const char *passphrase, - char **commentp) +/* XXX kill perm_ok now that we have SSH_ERR_KEY_BAD_PERMISSIONS? */ +int +sshkey_load_private_type(int type, const char *filename, const char *passphrase, + struct sshkey **keyp, char **commentp, int *perm_ok) { - switch (type) { - case KEY_RSA1: - return key_parse_private_rsa1(blob, passphrase, commentp); - case KEY_DSA: - case KEY_ECDSA: - case KEY_RSA: - case KEY_UNSPEC: - return key_parse_private_pem(blob, type, passphrase, commentp); - default: - error("%s: cannot parse key type %d", __func__, type); - break; - } - return NULL; -} + int fd, r; -Key * -key_load_private_type(int type, const char *filename, const char *passphrase, - char **commentp, int *perm_ok) -{ - int fd; - Key *ret; - Buffer buffer; + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; - fd = open(filename, O_RDONLY); - if (fd < 0) { - debug("could not open key file '%s': %s", filename, - strerror(errno)); +#ifdef WIN32_FIXME + if ((fd = open(filename, O_RDONLY | O_BINARY)) < 0) { +#else + if ((fd = open(filename, O_RDONLY)) < 0) { +#endif + if (perm_ok != NULL) *perm_ok = 0; - return NULL; + return SSH_ERR_SYSTEM_ERROR; } - if (!key_perm_ok(fd, filename)) { + if (sshkey_perm_ok(fd, filename) != 0) { if (perm_ok != NULL) *perm_ok = 0; - error("bad permissions: ignore key: %s", filename); - close(fd); - return NULL; + r = SSH_ERR_KEY_BAD_PERMISSIONS; + goto out; } if (perm_ok != NULL) *perm_ok = 1; - buffer_init(&buffer); - if (!key_load_file(fd, filename, &buffer)) { - buffer_free(&buffer); - close(fd); - return NULL; - } + r = sshkey_load_private_type_fd(fd, type, passphrase, keyp, commentp); + out: close(fd); - ret = key_parse_private_type(&buffer, type, passphrase, commentp); - buffer_free(&buffer); - return ret; + return r; } -Key * -key_parse_private(Buffer *buffer, const char *filename, - const char *passphrase, char **commentp) +int +sshkey_load_private_type_fd(int fd, int type, const char *passphrase, + struct sshkey **keyp, char **commentp) { - Key *pub, *prv; + struct sshbuf *buffer = NULL; + int r; - /* it's a SSH v1 key if the public key part is readable */ - pub = key_parse_public_rsa1(buffer, commentp); - if (pub == NULL) { - prv = key_parse_private_type(buffer, KEY_UNSPEC, - passphrase, NULL); - /* use the filename as a comment for PEM */ - if (commentp && prv) - *commentp = xstrdup(filename); - } else { - key_free(pub); - /* key_parse_public_rsa1() has already loaded the comment */ - prv = key_parse_private_type(buffer, KEY_RSA1, passphrase, - NULL); + if ((buffer = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; } - return prv; + if ((r = sshkey_load_file(fd, buffer)) != 0 || + (r = sshkey_parse_private_fileblob_type(buffer, type, + passphrase, keyp, commentp)) != 0) + goto out; + + /* success */ + r = 0; + out: + if (buffer != NULL) + sshbuf_free(buffer); + return r; } -Key * -key_load_private(const char *filename, const char *passphrase, - char **commentp) +/* XXX this is almost identical to sshkey_load_private_type() */ +int +sshkey_load_private(const char *filename, const char *passphrase, + struct sshkey **keyp, char **commentp) { - Key *prv; - Buffer buffer; - int fd; + struct sshbuf *buffer = NULL; + int r, fd; -#ifdef WIN32_FIXME - fd = open(filename, O_RDONLY | O_BINARY); -#else - fd = open(filename, O_RDONLY); -#endif + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; - if (fd < 0) { - debug("could not open key file '%s': %s", filename, - strerror(errno)); - return NULL; - } - if (!key_perm_ok(fd, filename)) { - error("bad permissions: ignore key: %s", filename); - close(fd); - return NULL; + if ((fd = open(filename, O_RDONLY)) < 0) + return SSH_ERR_SYSTEM_ERROR; + if (sshkey_perm_ok(fd, filename) != 0) { + r = SSH_ERR_KEY_BAD_PERMISSIONS; + goto out; } - buffer_init(&buffer); - if (!key_load_file(fd, filename, &buffer)) { - buffer_free(&buffer); - close(fd); - return NULL; + if ((buffer = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; } + if ((r = sshkey_load_file(fd, buffer)) != 0 || + (r = sshkey_parse_private_fileblob(buffer, passphrase, filename, + keyp, commentp)) != 0) + goto out; + r = 0; + out: close(fd); - - prv = key_parse_private(&buffer, filename, passphrase, commentp); - buffer_free(&buffer); - return prv; + if (buffer != NULL) + sshbuf_free(buffer); + return r; } static int -key_try_load_public(Key *k, const char *filename, char **commentp) +sshkey_try_load_public(struct sshkey *k, const char *filename, char **commentp) { FILE *f; char line[SSH_MAX_PUBKEY_BYTES]; char *cp; u_long linenum = 0; + int r; - f = fopen(filename, "r"); - if (f != NULL) { - while (read_keyfile_line(f, filename, line, sizeof(line), - &linenum) != -1) { - cp = line; - switch (*cp) { - case '#': - case '\n': - case '\0': - continue; - } - /* Abort loading if this looks like a private key */ - if (strncmp(cp, "-----BEGIN", 10) == 0) - break; - /* Skip leading whitespace. */ - for (; *cp && (*cp == ' ' || *cp == '\t'); cp++) - ; - if (*cp) { - if (key_read(k, &cp) == 1) { - cp[strcspn(cp, "\r\n")] = '\0'; - if (commentp) { - *commentp = xstrdup(*cp ? - cp : filename); - } - fclose(f); - return 1; + if (commentp != NULL) + *commentp = NULL; + if ((f = fopen(filename, "r")) == NULL) + return SSH_ERR_SYSTEM_ERROR; + while (read_keyfile_line(f, filename, line, sizeof(line), + &linenum) != -1) { + cp = line; + switch (*cp) { + case '#': + case '\n': + case '\0': + continue; + } + /* Abort loading if this looks like a private key */ + if (strncmp(cp, "-----BEGIN", 10) == 0 || + strcmp(cp, "SSH PRIVATE KEY FILE") == 0) + break; + /* Skip leading whitespace. */ + for (; *cp && (*cp == ' ' || *cp == '\t'); cp++) + ; + if (*cp) { + if ((r = sshkey_read(k, &cp)) == 0) { + cp[strcspn(cp, "\r\n")] = '\0'; + if (commentp) { + *commentp = strdup(*cp ? + cp : filename); + if (*commentp == NULL) + r = SSH_ERR_ALLOC_FAIL; } + fclose(f); + return r; } } - fclose(f); } - return 0; + fclose(f); + return SSH_ERR_INVALID_FORMAT; } /* load public key from ssh v1 private or any pubkey file */ -Key * -key_load_public(const char *filename, char **commentp) +int +sshkey_load_public(const char *filename, struct sshkey **keyp, char **commentp) { - Key *pub; - char file[MAXPATHLEN]; + struct sshkey *pub = NULL; + char file[PATH_MAX]; + int r, fd; + if (keyp != NULL) + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + + /* XXX should load file once and attempt to parse each format */ + + if ((fd = open(filename, O_RDONLY)) < 0) + goto skip; +#ifdef WITH_SSH1 /* try rsa1 private key */ - pub = key_load_public_type(KEY_RSA1, filename, commentp); - if (pub != NULL) - return pub; - - /* try rsa1 public key */ - pub = key_new(KEY_RSA1); - if (key_try_load_public(pub, filename, commentp) == 1) - return pub; - key_free(pub); + r = sshkey_load_public_rsa1(fd, keyp, commentp); + close(fd); + switch (r) { + case SSH_ERR_INTERNAL_ERROR: + case SSH_ERR_ALLOC_FAIL: + case SSH_ERR_INVALID_ARGUMENT: + case SSH_ERR_SYSTEM_ERROR: + case 0: + return r; + } +#else /* WITH_SSH1 */ + close(fd); +#endif /* WITH_SSH1 */ /* try ssh2 public key */ - pub = key_new(KEY_UNSPEC); - if (key_try_load_public(pub, filename, commentp) == 1) - return pub; + if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_try_load_public(pub, filename, commentp)) == 0) { + if (keyp != NULL) + *keyp = pub; + return 0; + } + sshkey_free(pub); + +#ifdef WITH_SSH1 + /* try rsa1 public key */ + if ((pub = sshkey_new(KEY_RSA1)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_try_load_public(pub, filename, commentp)) == 0) { + if (keyp != NULL) + *keyp = pub; + return 0; + } + sshkey_free(pub); +#endif /* WITH_SSH1 */ + + skip: + /* try .pub suffix */ + if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) + return SSH_ERR_ALLOC_FAIL; + r = SSH_ERR_ALLOC_FAIL; /* in case strlcpy or strlcat fail */ if ((strlcpy(file, filename, sizeof file) < sizeof(file)) && (strlcat(file, ".pub", sizeof file) < sizeof(file)) && - (key_try_load_public(pub, file, commentp) == 1)) - return pub; - key_free(pub); - return NULL; + (r = sshkey_try_load_public(pub, file, commentp)) == 0) { + if (keyp != NULL) + *keyp = pub; + return 0; + } + sshkey_free(pub); + + return r; } /* Load the certificate associated with the named private key */ -Key * -key_load_cert(const char *filename) +int +sshkey_load_cert(const char *filename, struct sshkey **keyp) { - Key *pub; - char *file; + struct sshkey *pub = NULL; + char *file = NULL; + int r = SSH_ERR_INTERNAL_ERROR; - pub = key_new(KEY_UNSPEC); - xasprintf(&file, "%s-cert.pub", filename); - if (key_try_load_public(pub, file, NULL) == 1) { - xfree(file); - return pub; + *keyp = NULL; + + if (asprintf(&file, "%s-cert.pub", filename) == -1) + return SSH_ERR_ALLOC_FAIL; + + if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) { + goto out; } - xfree(file); - key_free(pub); - return NULL; + if ((r = sshkey_try_load_public(pub, file, NULL)) != 0) + goto out; + + *keyp = pub; + pub = NULL; + r = 0; + + out: + if (file != NULL) + free(file); + if (pub != NULL) + sshkey_free(pub); + return r; } /* Load private key and certificate */ -Key * -key_load_private_cert(int type, const char *filename, const char *passphrase, - int *perm_ok) +int +sshkey_load_private_cert(int type, const char *filename, const char *passphrase, + struct sshkey **keyp, int *perm_ok) { - Key *key, *pub; + struct sshkey *key = NULL, *cert = NULL; + int r; + + *keyp = NULL; switch (type) { +#ifdef WITH_OPENSSL case KEY_RSA: case KEY_DSA: case KEY_ECDSA: +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_UNSPEC: break; default: - error("%s: unsupported key type", __func__); - return NULL; + return SSH_ERR_KEY_TYPE_UNKNOWN; } - if ((key = key_load_private_type(type, filename, - passphrase, NULL, perm_ok)) == NULL) - return NULL; - - if ((pub = key_load_cert(filename)) == NULL) { - key_free(key); - return NULL; - } + if ((r = sshkey_load_private_type(type, filename, + passphrase, &key, NULL, perm_ok)) != 0 || + (r = sshkey_load_cert(filename, &cert)) != 0) + goto out; /* Make sure the private key matches the certificate */ - if (key_equal_public(key, pub) == 0) { - error("%s: certificate does not match private key %s", - __func__, filename); - } else if (key_to_certified(key, key_cert_is_legacy(pub)) != 0) { - error("%s: key_to_certified failed", __func__); - } else { - key_cert_copy(pub, key); - key_free(pub); - return key; + if (sshkey_equal_public(key, cert) == 0) { + r = SSH_ERR_KEY_CERT_MISMATCH; + goto out; } - key_free(key); - key_free(pub); - return NULL; + if ((r = sshkey_to_certified(key)) != 0 || + (r = sshkey_cert_copy(cert, key)) != 0) + goto out; + r = 0; + *keyp = key; + key = NULL; + out: + if (key != NULL) + sshkey_free(key); + if (cert != NULL) + sshkey_free(cert); + return r; } /* - * Returns 1 if the specified "key" is listed in the file "filename", - * 0 if the key is not listed or -1 on error. - * If strict_type is set then the key type must match exactly, + * Returns success if the specified "key" is listed in the file "filename", + * SSH_ERR_KEY_NOT_FOUND: if the key is not listed or another error. + * If "strict_type" is set then the key type must match exactly, * otherwise a comparison that ignores certficiate data is performed. + * If "check_ca" is set and "key" is a certificate, then its CA key is + * also checked and sshkey_in_file() will return success if either is found. */ int -key_in_file(Key *key, const char *filename, int strict_type) +sshkey_in_file(struct sshkey *key, const char *filename, int strict_type, + int check_ca) { FILE *f; char line[SSH_MAX_PUBKEY_BYTES]; char *cp; u_long linenum = 0; - int ret = 0; - Key *pub; - int (*key_compare)(const Key *, const Key *) = strict_type ? - key_equal : key_equal_public; + int r = 0; + struct sshkey *pub = NULL; + int (*sshkey_compare)(const struct sshkey *, const struct sshkey *) = + strict_type ? sshkey_equal : sshkey_equal_public; - if ((f = fopen(filename, "r")) == NULL) { - if (errno == ENOENT) { - debug("%s: keyfile \"%s\" missing", __func__, filename); - return 0; - } else { - error("%s: could not open keyfile \"%s\": %s", __func__, - filename, strerror(errno)); - return -1; - } - } + if ((f = fopen(filename, "r")) == NULL) + return SSH_ERR_SYSTEM_ERROR; while (read_keyfile_line(f, filename, line, sizeof(line), - &linenum) != -1) { + &linenum) != -1) { cp = line; /* Skip leading whitespace. */ @@ -936,18 +531,60 @@ key_in_file(Key *key, const char *filename, int strict_type) continue; } - pub = key_new(KEY_UNSPEC); - if (key_read(pub, &cp) != 1) { - key_free(pub); - continue; + if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; } - if (key_compare(key, pub)) { - ret = 1; - key_free(pub); - break; + if ((r = sshkey_read(pub, &cp)) != 0) + goto out; + if (sshkey_compare(key, pub) || + (check_ca && sshkey_is_cert(key) && + sshkey_compare(key->cert->signature_key, pub))) { + r = 0; + goto out; } - key_free(pub); + sshkey_free(pub); + pub = NULL; } + r = SSH_ERR_KEY_NOT_FOUND; + out: + if (pub != NULL) + sshkey_free(pub); fclose(f); - return ret; + return r; } + +/* + * Checks whether the specified key is revoked, returning 0 if not, + * SSH_ERR_KEY_REVOKED if it is or another error code if something + * unexpected happened. + * This will check both the key and, if it is a certificate, its CA key too. + * "revoked_keys_file" may be a KRL or a one-per-line list of public keys. + */ +int +sshkey_check_revoked(struct sshkey *key, const char *revoked_keys_file) +{ + int r; + + r = ssh_krl_file_contains_key(revoked_keys_file, key); + /* If this was not a KRL to begin with then continue below */ + if (r != SSH_ERR_KRL_BAD_MAGIC) + return r; + + /* + * If the file is not a KRL or we can't handle KRLs then attempt to + * parse the file as a flat list of keys. + */ + switch ((r = sshkey_in_file(key, revoked_keys_file, 0, 1))) { + case 0: + /* Key found => revoked */ + return SSH_ERR_KEY_REVOKED; + case SSH_ERR_KEY_NOT_FOUND: + /* Key not found => not revoked */ + return 0; + default: + /* Some other error occurred */ + return r; + } +} + diff --git a/authfile.h b/authfile.h index 78349be..624d269 100644 --- a/authfile.h +++ b/authfile.h @@ -1,31 +1,52 @@ -/* $OpenBSD: authfile.h,v 1.16 2011/05/04 21:15:29 djm Exp $ */ +/* $OpenBSD: authfile.h,v 1.21 2015/01/08 10:14:08 djm Exp $ */ /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved + * Copyright (c) 2000, 2013 Markus Friedl. All rights reserved. * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef AUTHFILE_H #define AUTHFILE_H -int key_save_private(Key *, const char *, const char *, const char *); -int key_load_file(int, const char *, Buffer *); -Key *key_load_cert(const char *); -Key *key_load_public(const char *, char **); -Key *key_load_public_type(int, const char *, char **); -Key *key_parse_private(Buffer *, const char *, const char *, char **); -Key *key_load_private(const char *, const char *, char **); -Key *key_load_private_cert(int, const char *, const char *, int *); -Key *key_load_private_type(int, const char *, const char *, char **, int *); -Key *key_load_private_pem(int, int, const char *, char **); -int key_perm_ok(int, const char *); -int key_in_file(Key *, const char *, int); +struct sshbuf; +struct sshkey; + +/* XXX document these */ +/* XXX some of these could probably be merged/retired */ + +int sshkey_save_private(struct sshkey *, const char *, + const char *, const char *, int, const char *, int); +int sshkey_load_file(int, struct sshbuf *); +int sshkey_load_cert(const char *, struct sshkey **); +int sshkey_load_public(const char *, struct sshkey **, char **); +int sshkey_load_private(const char *, const char *, struct sshkey **, char **); +int sshkey_load_private_cert(int, const char *, const char *, + struct sshkey **, int *); +int sshkey_load_private_type(int, const char *, const char *, + struct sshkey **, char **, int *); +int sshkey_load_private_type_fd(int fd, int type, const char *passphrase, + struct sshkey **keyp, char **commentp); +int sshkey_perm_ok(int, const char *); +int sshkey_in_file(struct sshkey *, const char *, int, int); +int sshkey_check_revoked(struct sshkey *key, const char *revoked_keys_file); #endif diff --git a/bitmap.c b/bitmap.c new file mode 100644 index 0000000..19cd2e8 --- /dev/null +++ b/bitmap.c @@ -0,0 +1,212 @@ +/* + * Copyright (c) 2015 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include +#include + +#include "bitmap.h" + +#define BITMAP_WTYPE u_int +#define BITMAP_MAX (1<<24) +#define BITMAP_BYTES (sizeof(BITMAP_WTYPE)) +#define BITMAP_BITS (sizeof(BITMAP_WTYPE) * 8) +#define BITMAP_WMASK ((BITMAP_WTYPE)BITMAP_BITS - 1) +struct bitmap { + BITMAP_WTYPE *d; + size_t len; /* number of words allocated */ + size_t top; /* index of top word allocated */ +}; + +struct bitmap * +bitmap_new(void) +{ + struct bitmap *ret; + + if ((ret = calloc(1, sizeof(*ret))) == NULL) + return NULL; + if ((ret->d = calloc(1, BITMAP_BYTES)) == NULL) { + free(ret); + return NULL; + } + ret->len = 1; + ret->top = 0; + return ret; +} + +void +bitmap_free(struct bitmap *b) +{ + if (b != NULL && b->d != NULL) { + memset(b->d, 0, b->len); + free(b->d); + } + free(b); +} + +void +bitmap_zero(struct bitmap *b) +{ + memset(b->d, 0, b->len * BITMAP_BYTES); + b->top = 0; +} + +int +bitmap_test_bit(struct bitmap *b, u_int n) +{ + if (b->top >= b->len) + return 0; /* invalid */ + if (b->len == 0 || (n / BITMAP_BITS) > b->top) + return 0; + return (b->d[n / BITMAP_BITS] >> (n & BITMAP_WMASK)) & 1; +} + +static int +reserve(struct bitmap *b, u_int n) +{ + BITMAP_WTYPE *tmp; + size_t nlen; + + if (b->top >= b->len || n > BITMAP_MAX) + return -1; /* invalid */ + nlen = (n / BITMAP_BITS) + 1; + if (b->len < nlen) { + if ((tmp = reallocarray(b->d, nlen, BITMAP_BYTES)) == NULL) + return -1; + b->d = tmp; + memset(b->d + b->len, 0, (nlen - b->len) * BITMAP_BYTES); + b->len = nlen; + } + return 0; +} + +int +bitmap_set_bit(struct bitmap *b, u_int n) +{ + int r; + size_t offset; + + if ((r = reserve(b, n)) != 0) + return r; + offset = n / BITMAP_BITS; + if (offset > b->top) + b->top = offset; + b->d[offset] |= (BITMAP_WTYPE)1 << (n & BITMAP_WMASK); + return 0; +} + +/* Resets b->top to point to the most significant bit set in b->d */ +static void +retop(struct bitmap *b) +{ + if (b->top >= b->len) + return; + while (b->top > 0 && b->d[b->top] == 0) + b->top--; +} + +void +bitmap_clear_bit(struct bitmap *b, u_int n) +{ + size_t offset; + + if (b->top >= b->len || n > BITMAP_MAX) + return; /* invalid */ + offset = n / BITMAP_BITS; + if (offset > b->top) + return; + b->d[offset] &= ~((BITMAP_WTYPE)1 << (n & BITMAP_WMASK)); + /* The top may have changed as a result of the clear */ + retop(b); +} + +size_t +bitmap_nbits(struct bitmap *b) +{ + size_t bits; + BITMAP_WTYPE w; + + retop(b); + if (b->top >= b->len) + return 0; /* invalid */ + if (b->len == 0 || (b->top == 0 && b->d[0] == 0)) + return 0; + /* Find MSB set */ + w = b->d[b->top]; + bits = (b->top + 1) * BITMAP_BITS; + while (!(w & ((BITMAP_WTYPE)1 << (BITMAP_BITS - 1)))) { + w <<= 1; + bits--; + } + return bits; +} + +size_t +bitmap_nbytes(struct bitmap *b) +{ + return (bitmap_nbits(b) + 7) / 8; +} + +int +bitmap_to_string(struct bitmap *b, void *p, size_t l) +{ + u_char *s = (u_char *)p; + size_t i, j, k, need = bitmap_nbytes(b); + + if (l < need || b->top >= b->len) + return -1; + if (l > need) + l = need; + /* Put the bytes from LSB backwards */ + for (i = k = 0; i < b->top + 1; i++) { + for (j = 0; j < BITMAP_BYTES; j++) { + if (k >= l) + break; + s[need - 1 - k++] = (b->d[i] >> (j * 8)) & 0xff; + } + } + return 0; +} + +int +bitmap_from_string(struct bitmap *b, const void *p, size_t l) +{ + int r; + size_t i, offset, shift; + u_char *s = (u_char *)p; + + if (l > BITMAP_MAX / 8) + return -1; + if ((r = reserve(b, l * 8)) != 0) + return r; + bitmap_zero(b); + if (l == 0) + return 0; + b->top = offset = ((l + (BITMAP_BYTES - 1)) / BITMAP_BYTES) - 1; + shift = ((l + (BITMAP_BYTES - 1)) % BITMAP_BYTES) * 8; + for (i = 0; i < l; i++) { + b->d[offset] |= (BITMAP_WTYPE)s[i] << shift; + if (shift == 0) { + offset--; + shift = BITMAP_BITS - 8; + } else + shift -= 8; + } + retop(b); + return 0; +} diff --git a/bitmap.h b/bitmap.h new file mode 100644 index 0000000..c1bb174 --- /dev/null +++ b/bitmap.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2015 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _BITMAP_H +#define _BITMAP_H + +#include + +/* Simple bit vector routines */ + +struct bitmap; + +/* Allocate a new bitmap. Returns NULL on allocation failure. */ +struct bitmap *bitmap_new(void); + +/* Free a bitmap */ +void bitmap_free(struct bitmap *b); + +/* Zero an existing bitmap */ +void bitmap_zero(struct bitmap *b); + +/* Test whether a bit is set in a bitmap. */ +int bitmap_test_bit(struct bitmap *b, u_int n); + +/* Set a bit in a bitmap. Returns 0 on success or -1 on error */ +int bitmap_set_bit(struct bitmap *b, u_int n); + +/* Clear a bit in a bitmap */ +void bitmap_clear_bit(struct bitmap *b, u_int n); + +/* Return the number of bits in a bitmap (i.e. the position of the MSB) */ +size_t bitmap_nbits(struct bitmap *b); + +/* Return the number of bytes needed to represent a bitmap */ +size_t bitmap_nbytes(struct bitmap *b); + +/* Convert a bitmap to a big endian byte string */ +int bitmap_to_string(struct bitmap *b, void *p, size_t l); + +/* Convert a big endian byte string to a bitmap */ +int bitmap_from_string(struct bitmap *b, const void *p, size_t l); + +#endif /* _BITMAP_H */ diff --git a/blocks.c b/blocks.c new file mode 100644 index 0000000..ad93fe5 --- /dev/null +++ b/blocks.c @@ -0,0 +1,248 @@ +/* $OpenBSD: blocks.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Author: Daniel J. Bernstein + * Copied from nacl-20110221/crypto_hashblocks/sha512/ref/blocks.c + */ + +#include "includes.h" + +#include "crypto_api.h" + +typedef unsigned long long uint64; + +static uint64 load_bigendian(const unsigned char *x) +{ + return + (uint64) (x[7]) \ + | (((uint64) (x[6])) << 8) \ + | (((uint64) (x[5])) << 16) \ + | (((uint64) (x[4])) << 24) \ + | (((uint64) (x[3])) << 32) \ + | (((uint64) (x[2])) << 40) \ + | (((uint64) (x[1])) << 48) \ + | (((uint64) (x[0])) << 56) + ; +} + +static void store_bigendian(unsigned char *x,uint64 u) +{ + x[7] = u; u >>= 8; + x[6] = u; u >>= 8; + x[5] = u; u >>= 8; + x[4] = u; u >>= 8; + x[3] = u; u >>= 8; + x[2] = u; u >>= 8; + x[1] = u; u >>= 8; + x[0] = u; +} + +#define SHR(x,c) ((x) >> (c)) +#define ROTR(x,c) (((x) >> (c)) | ((x) << (64 - (c)))) + +#define Ch(x,y,z) ((x & y) ^ (~x & z)) +#define Maj(x,y,z) ((x & y) ^ (x & z) ^ (y & z)) +#define Sigma0(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39)) +#define Sigma1(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41)) +#define sigma0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x,7)) +#define sigma1(x) (ROTR(x,19) ^ ROTR(x,61) ^ SHR(x,6)) + +#define M(w0,w14,w9,w1) w0 = sigma1(w14) + w9 + sigma0(w1) + w0; + +#define EXPAND \ + M(w0 ,w14,w9 ,w1 ) \ + M(w1 ,w15,w10,w2 ) \ + M(w2 ,w0 ,w11,w3 ) \ + M(w3 ,w1 ,w12,w4 ) \ + M(w4 ,w2 ,w13,w5 ) \ + M(w5 ,w3 ,w14,w6 ) \ + M(w6 ,w4 ,w15,w7 ) \ + M(w7 ,w5 ,w0 ,w8 ) \ + M(w8 ,w6 ,w1 ,w9 ) \ + M(w9 ,w7 ,w2 ,w10) \ + M(w10,w8 ,w3 ,w11) \ + M(w11,w9 ,w4 ,w12) \ + M(w12,w10,w5 ,w13) \ + M(w13,w11,w6 ,w14) \ + M(w14,w12,w7 ,w15) \ + M(w15,w13,w8 ,w0 ) + +#define F(w,k) \ + T1 = h + Sigma1(e) + Ch(e,f,g) + k + w; \ + T2 = Sigma0(a) + Maj(a,b,c); \ + h = g; \ + g = f; \ + f = e; \ + e = d + T1; \ + d = c; \ + c = b; \ + b = a; \ + a = T1 + T2; + +int crypto_hashblocks_sha512(unsigned char *statebytes,const unsigned char *in,unsigned long long inlen) +{ + uint64 state[8]; + uint64 a; + uint64 b; + uint64 c; + uint64 d; + uint64 e; + uint64 f; + uint64 g; + uint64 h; + uint64 T1; + uint64 T2; + + a = load_bigendian(statebytes + 0); state[0] = a; + b = load_bigendian(statebytes + 8); state[1] = b; + c = load_bigendian(statebytes + 16); state[2] = c; + d = load_bigendian(statebytes + 24); state[3] = d; + e = load_bigendian(statebytes + 32); state[4] = e; + f = load_bigendian(statebytes + 40); state[5] = f; + g = load_bigendian(statebytes + 48); state[6] = g; + h = load_bigendian(statebytes + 56); state[7] = h; + + while (inlen >= 128) { + uint64 w0 = load_bigendian(in + 0); + uint64 w1 = load_bigendian(in + 8); + uint64 w2 = load_bigendian(in + 16); + uint64 w3 = load_bigendian(in + 24); + uint64 w4 = load_bigendian(in + 32); + uint64 w5 = load_bigendian(in + 40); + uint64 w6 = load_bigendian(in + 48); + uint64 w7 = load_bigendian(in + 56); + uint64 w8 = load_bigendian(in + 64); + uint64 w9 = load_bigendian(in + 72); + uint64 w10 = load_bigendian(in + 80); + uint64 w11 = load_bigendian(in + 88); + uint64 w12 = load_bigendian(in + 96); + uint64 w13 = load_bigendian(in + 104); + uint64 w14 = load_bigendian(in + 112); + uint64 w15 = load_bigendian(in + 120); + + F(w0 ,0x428a2f98d728ae22ULL) + F(w1 ,0x7137449123ef65cdULL) + F(w2 ,0xb5c0fbcfec4d3b2fULL) + F(w3 ,0xe9b5dba58189dbbcULL) + F(w4 ,0x3956c25bf348b538ULL) + F(w5 ,0x59f111f1b605d019ULL) + F(w6 ,0x923f82a4af194f9bULL) + F(w7 ,0xab1c5ed5da6d8118ULL) + F(w8 ,0xd807aa98a3030242ULL) + F(w9 ,0x12835b0145706fbeULL) + F(w10,0x243185be4ee4b28cULL) + F(w11,0x550c7dc3d5ffb4e2ULL) + F(w12,0x72be5d74f27b896fULL) + F(w13,0x80deb1fe3b1696b1ULL) + F(w14,0x9bdc06a725c71235ULL) + F(w15,0xc19bf174cf692694ULL) + + EXPAND + + F(w0 ,0xe49b69c19ef14ad2ULL) + F(w1 ,0xefbe4786384f25e3ULL) + F(w2 ,0x0fc19dc68b8cd5b5ULL) + F(w3 ,0x240ca1cc77ac9c65ULL) + F(w4 ,0x2de92c6f592b0275ULL) + F(w5 ,0x4a7484aa6ea6e483ULL) + F(w6 ,0x5cb0a9dcbd41fbd4ULL) + F(w7 ,0x76f988da831153b5ULL) + F(w8 ,0x983e5152ee66dfabULL) + F(w9 ,0xa831c66d2db43210ULL) + F(w10,0xb00327c898fb213fULL) + F(w11,0xbf597fc7beef0ee4ULL) + F(w12,0xc6e00bf33da88fc2ULL) + F(w13,0xd5a79147930aa725ULL) + F(w14,0x06ca6351e003826fULL) + F(w15,0x142929670a0e6e70ULL) + + EXPAND + + F(w0 ,0x27b70a8546d22ffcULL) + F(w1 ,0x2e1b21385c26c926ULL) + F(w2 ,0x4d2c6dfc5ac42aedULL) + F(w3 ,0x53380d139d95b3dfULL) + F(w4 ,0x650a73548baf63deULL) + F(w5 ,0x766a0abb3c77b2a8ULL) + F(w6 ,0x81c2c92e47edaee6ULL) + F(w7 ,0x92722c851482353bULL) + F(w8 ,0xa2bfe8a14cf10364ULL) + F(w9 ,0xa81a664bbc423001ULL) + F(w10,0xc24b8b70d0f89791ULL) + F(w11,0xc76c51a30654be30ULL) + F(w12,0xd192e819d6ef5218ULL) + F(w13,0xd69906245565a910ULL) + F(w14,0xf40e35855771202aULL) + F(w15,0x106aa07032bbd1b8ULL) + + EXPAND + + F(w0 ,0x19a4c116b8d2d0c8ULL) + F(w1 ,0x1e376c085141ab53ULL) + F(w2 ,0x2748774cdf8eeb99ULL) + F(w3 ,0x34b0bcb5e19b48a8ULL) + F(w4 ,0x391c0cb3c5c95a63ULL) + F(w5 ,0x4ed8aa4ae3418acbULL) + F(w6 ,0x5b9cca4f7763e373ULL) + F(w7 ,0x682e6ff3d6b2b8a3ULL) + F(w8 ,0x748f82ee5defb2fcULL) + F(w9 ,0x78a5636f43172f60ULL) + F(w10,0x84c87814a1f0ab72ULL) + F(w11,0x8cc702081a6439ecULL) + F(w12,0x90befffa23631e28ULL) + F(w13,0xa4506cebde82bde9ULL) + F(w14,0xbef9a3f7b2c67915ULL) + F(w15,0xc67178f2e372532bULL) + + EXPAND + + F(w0 ,0xca273eceea26619cULL) + F(w1 ,0xd186b8c721c0c207ULL) + F(w2 ,0xeada7dd6cde0eb1eULL) + F(w3 ,0xf57d4f7fee6ed178ULL) + F(w4 ,0x06f067aa72176fbaULL) + F(w5 ,0x0a637dc5a2c898a6ULL) + F(w6 ,0x113f9804bef90daeULL) + F(w7 ,0x1b710b35131c471bULL) + F(w8 ,0x28db77f523047d84ULL) + F(w9 ,0x32caab7b40c72493ULL) + F(w10,0x3c9ebe0a15c9bebcULL) + F(w11,0x431d67c49c100d4cULL) + F(w12,0x4cc5d4becb3e42b6ULL) + F(w13,0x597f299cfc657e2aULL) + F(w14,0x5fcb6fab3ad6faecULL) + F(w15,0x6c44198c4a475817ULL) + + a += state[0]; + b += state[1]; + c += state[2]; + d += state[3]; + e += state[4]; + f += state[5]; + g += state[6]; + h += state[7]; + + state[0] = a; + state[1] = b; + state[2] = c; + state[3] = d; + state[4] = e; + state[5] = f; + state[6] = g; + state[7] = h; + + in += 128; + inlen -= 128; + } + + store_bigendian(statebytes + 0,state[0]); + store_bigendian(statebytes + 8,state[1]); + store_bigendian(statebytes + 16,state[2]); + store_bigendian(statebytes + 24,state[3]); + store_bigendian(statebytes + 32,state[4]); + store_bigendian(statebytes + 40,state[5]); + store_bigendian(statebytes + 48,state[6]); + store_bigendian(statebytes + 56,state[7]); + + return inlen; +} diff --git a/bufaux.c b/bufaux.c index 2cd5927..67ce288 100644 --- a/bufaux.c +++ b/bufaux.c @@ -1,69 +1,40 @@ -/* $OpenBSD: bufaux.c,v 1.50 2010/08/31 09:58:37 djm Exp $ */ +/* $OpenBSD: bufaux.c,v 1.60 2014/04/30 05:29:56 djm Exp $ */ /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved - * Auxiliary functions for storing and retrieving various data types to/from - * Buffers. + * Copyright (c) 2012 Damien Miller * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. * - * - * SSH2 packet format added by Markus Friedl - * Copyright (c) 2000 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ + #include "includes.h" #include -#include - -#include -#include - -#include "xmalloc.h" #include "buffer.h" #include "log.h" -#include "misc.h" - -/* - * Returns integers from the buffer (msb first). - */ +#include "ssherr.h" int -buffer_get_short_ret(u_short *ret, Buffer *buffer) +buffer_get_short_ret(u_short *v, Buffer *buffer) { - u_char buf[2]; + int ret; - if (buffer_get_ret(buffer, (char *) buf, 2) == -1) - return (-1); - *ret = get_u16(buf); - return (0); + if ((ret = sshbuf_get_u16(buffer, v)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; + } + return 0; } u_short @@ -72,21 +43,21 @@ buffer_get_short(Buffer *buffer) u_short ret; if (buffer_get_short_ret(&ret, buffer) == -1) - fatal("buffer_get_short: buffer error"); + fatal("%s: buffer error", __func__); return (ret); } int -buffer_get_int_ret(u_int *ret, Buffer *buffer) +buffer_get_int_ret(u_int *v, Buffer *buffer) { - u_char buf[4]; + int ret; - if (buffer_get_ret(buffer, (char *) buf, 4) == -1) - return (-1); - if (ret != NULL) - *ret = get_u32(buf); - return (0); + if ((ret = sshbuf_get_u32(buffer, v)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; + } + return 0; } u_int @@ -95,21 +66,21 @@ buffer_get_int(Buffer *buffer) u_int ret; if (buffer_get_int_ret(&ret, buffer) == -1) - fatal("buffer_get_int: buffer error"); + fatal("%s: buffer error", __func__); return (ret); } int -buffer_get_int64_ret(u_int64_t *ret, Buffer *buffer) +buffer_get_int64_ret(u_int64_t *v, Buffer *buffer) { - u_char buf[8]; + int ret; - if (buffer_get_ret(buffer, (char *) buf, 8) == -1) - return (-1); - if (ret != NULL) - *ret = get_u64(buf); - return (0); + if ((ret = sshbuf_get_u64(buffer, v)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; + } + return 0; } u_int64_t @@ -118,78 +89,52 @@ buffer_get_int64(Buffer *buffer) u_int64_t ret; if (buffer_get_int64_ret(&ret, buffer) == -1) - fatal("buffer_get_int: buffer error"); + fatal("%s: buffer error", __func__); return (ret); } -/* - * Stores integers in the buffer, msb first. - */ void buffer_put_short(Buffer *buffer, u_short value) { - char buf[2]; + int ret; - put_u16(buf, value); - buffer_append(buffer, buf, 2); + if ((ret = sshbuf_put_u16(buffer, value)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } void buffer_put_int(Buffer *buffer, u_int value) { - char buf[4]; + int ret; - put_u32(buf, value); - buffer_append(buffer, buf, 4); + if ((ret = sshbuf_put_u32(buffer, value)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } void buffer_put_int64(Buffer *buffer, u_int64_t value) { - char buf[8]; + int ret; - put_u64(buf, value); - buffer_append(buffer, buf, 8); + if ((ret = sshbuf_put_u64(buffer, value)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } -/* - * Returns an arbitrary binary string from the buffer. The string cannot - * be longer than 256k. The returned value points to memory allocated - * with xmalloc; it is the responsibility of the calling function to free - * the data. If length_ptr is non-NULL, the length of the returned data - * will be stored there. A null character will be automatically appended - * to the returned string, and is not counted in length. - */ void * buffer_get_string_ret(Buffer *buffer, u_int *length_ptr) { + size_t len; + int ret; u_char *value; - u_int len; - /* Get the length. */ - if (buffer_get_int_ret(&len, buffer) != 0) { - error("buffer_get_string_ret: cannot extract length"); - return (NULL); + if ((ret = sshbuf_get_string(buffer, &value, &len)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return NULL; } - if (len > 256 * 1024) { - error("buffer_get_string_ret: bad string length %u", len); - return (NULL); - } - /* Allocate space for the string. Add one byte for a null character. */ - value = xmalloc(len + 1); - /* Get the string. */ - if (buffer_get_ret(buffer, value, len) == -1) { - error("buffer_get_string_ret: buffer_get failed"); - xfree(value); - return (NULL); - } - /* Append a null character to make processing easier. */ - value[len] = '\0'; - /* Optionally return the length of the string. */ - if (length_ptr) - *length_ptr = len; - return (value); + if (length_ptr != NULL) + *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */ + return value; } void * @@ -198,31 +143,24 @@ buffer_get_string(Buffer *buffer, u_int *length_ptr) void *ret; if ((ret = buffer_get_string_ret(buffer, length_ptr)) == NULL) - fatal("buffer_get_string: buffer error"); + fatal("%s: buffer error", __func__); return (ret); } char * buffer_get_cstring_ret(Buffer *buffer, u_int *length_ptr) { - u_int length; - char *cp, *ret = buffer_get_string_ret(buffer, &length); + size_t len; + int ret; + char *value; - if (ret == NULL) + if ((ret = sshbuf_get_cstring(buffer, &value, &len)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); return NULL; - if ((cp = memchr(ret, '\0', length)) != NULL) { - /* XXX allow \0 at end-of-string for a while, remove later */ - if (cp == ret + length - 1) - error("buffer_get_cstring_ret: string contains \\0"); - else { - bzero(ret, length); - xfree(ret); - return NULL; - } } if (length_ptr != NULL) - *length_ptr = length; - return ret; + *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */ + return value; } char * @@ -231,67 +169,64 @@ buffer_get_cstring(Buffer *buffer, u_int *length_ptr) char *ret; if ((ret = buffer_get_cstring_ret(buffer, length_ptr)) == NULL) - fatal("buffer_get_cstring: buffer error"); + fatal("%s: buffer error", __func__); return ret; } -void * +const void * buffer_get_string_ptr_ret(Buffer *buffer, u_int *length_ptr) { - void *ptr; - u_int len; + size_t len; + int ret; + const u_char *value; - if (buffer_get_int_ret(&len, buffer) != 0) - return NULL; - if (len > 256 * 1024) { - error("buffer_get_string_ptr: bad string length %u", len); + if ((ret = sshbuf_get_string_direct(buffer, &value, &len)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); return NULL; } - ptr = buffer_ptr(buffer); - buffer_consume(buffer, len); - if (length_ptr) - *length_ptr = len; - return (ptr); + if (length_ptr != NULL) + *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */ + return value; } -void * +const void * buffer_get_string_ptr(Buffer *buffer, u_int *length_ptr) { - void *ret; + const void *ret; if ((ret = buffer_get_string_ptr_ret(buffer, length_ptr)) == NULL) - fatal("buffer_get_string_ptr: buffer error"); + fatal("%s: buffer error", __func__); return (ret); } -/* - * Stores and arbitrary binary string in the buffer. - */ void buffer_put_string(Buffer *buffer, const void *buf, u_int len) { - buffer_put_int(buffer, len); - buffer_append(buffer, buf, len); + int ret; + + if ((ret = sshbuf_put_string(buffer, buf, len)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } + void buffer_put_cstring(Buffer *buffer, const char *s) { - if (s == NULL) - fatal("buffer_put_cstring: s == NULL"); - buffer_put_string(buffer, s, strlen(s)); + int ret; + + if ((ret = sshbuf_put_cstring(buffer, s)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } -/* - * Returns a character from the buffer (0 - 255). - */ int -buffer_get_char_ret(char *ret, Buffer *buffer) +buffer_get_char_ret(char *v, Buffer *buffer) { - if (buffer_get_ret(buffer, ret, 1) == -1) { - error("buffer_get_char_ret: buffer_get_ret failed"); - return (-1); + int ret; + + if ((ret = sshbuf_get_u8(buffer, (u_char *)v)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - return (0); + return 0; } int @@ -300,19 +235,26 @@ buffer_get_char(Buffer *buffer) char ch; if (buffer_get_char_ret(&ch, buffer) == -1) - fatal("buffer_get_char: buffer error"); + fatal("%s: buffer error", __func__); return (u_char) ch; } -/* - * Stores a character in the buffer. - */ void buffer_put_char(Buffer *buffer, int value) { - char ch = value; + int ret; - buffer_append(buffer, &ch, 1); + if ((ret = sshbuf_put_u8(buffer, value)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); +} + +void +buffer_put_bignum2_from_string(Buffer *buffer, const u_char *s, u_int l) +{ + int ret; + + if ((ret = sshbuf_put_bignum2_bytes(buffer, s, l)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } #ifdef WIN32_FIXME @@ -373,3 +315,4 @@ void buffer_put_string_local8_to_utf8(Buffer *b, const void *str, u_int len) #endif /* WIN32_FIXME */ + diff --git a/bufbn.c b/bufbn.c index 251cd09..33ae7f7 100644 --- a/bufbn.c +++ b/bufbn.c @@ -1,223 +1,109 @@ -/* $OpenBSD: bufbn.c,v 1.6 2007/06/02 09:04:58 djm Exp $*/ +/* $OpenBSD: bufbn.c,v 1.12 2014/04/30 05:29:56 djm Exp $ */ + /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved - * Auxiliary functions for storing and retrieving various data types to/from - * Buffers. + * Copyright (c) 2012 Damien Miller * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. * - * - * SSH2 packet format added by Markus Friedl - * Copyright (c) 2000 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ + #include "includes.h" +#ifdef WITH_OPENSSL + #include -#include - -#include -#include - -#include "xmalloc.h" #include "buffer.h" #include "log.h" -#include "misc.h" +#include "ssherr.h" -/* - * Stores an BIGNUM in the buffer with a 2-byte msb first bit count, followed - * by (bits+7)/8 bytes of binary data, msb first. - */ +#ifdef WITH_SSH1 int buffer_put_bignum_ret(Buffer *buffer, const BIGNUM *value) { - int bits = BN_num_bits(value); - int bin_size = (bits + 7) / 8; - u_char *buf = xmalloc(bin_size); - int oi; - char msg[2]; + int ret; - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf); - if (oi != bin_size) { - error("buffer_put_bignum_ret: BN_bn2bin() failed: oi %d != bin_size %d", - oi, bin_size); - xfree(buf); - return (-1); + if ((ret = sshbuf_put_bignum1(buffer, value)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - - /* Store the number of bits in the buffer in two bytes, msb first. */ - put_u16(msg, bits); - buffer_append(buffer, msg, 2); - /* Store the binary data. */ - buffer_append(buffer, buf, oi); - - memset(buf, 0, bin_size); - xfree(buf); - - return (0); + return 0; } void buffer_put_bignum(Buffer *buffer, const BIGNUM *value) { if (buffer_put_bignum_ret(buffer, value) == -1) - fatal("buffer_put_bignum: buffer error"); + fatal("%s: buffer error", __func__); } -/* - * Retrieves a BIGNUM from the buffer. - */ int buffer_get_bignum_ret(Buffer *buffer, BIGNUM *value) { - u_int bits, bytes; - u_char buf[2], *bin; + int ret; - /* Get the number of bits. */ - if (buffer_get_ret(buffer, (char *) buf, 2) == -1) { - error("buffer_get_bignum_ret: invalid length"); - return (-1); + if ((ret = sshbuf_get_bignum1(buffer, value)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - bits = get_u16(buf); - /* Compute the number of binary bytes that follow. */ - bytes = (bits + 7) / 8; - if (bytes > 8 * 1024) { - error("buffer_get_bignum_ret: cannot handle BN of size %d", bytes); - return (-1); - } - if (buffer_len(buffer) < bytes) { - error("buffer_get_bignum_ret: input buffer too small"); - return (-1); - } - bin = buffer_ptr(buffer); - if (BN_bin2bn(bin, bytes, value) == NULL) { - error("buffer_get_bignum_ret: BN_bin2bn failed"); - return (-1); - } - if (buffer_consume_ret(buffer, bytes) == -1) { - error("buffer_get_bignum_ret: buffer_consume failed"); - return (-1); - } - return (0); + return 0; } void buffer_get_bignum(Buffer *buffer, BIGNUM *value) { if (buffer_get_bignum_ret(buffer, value) == -1) - fatal("buffer_get_bignum: buffer error"); + fatal("%s: buffer error", __func__); } +#endif /* WITH_SSH1 */ -/* - * Stores a BIGNUM in the buffer in SSH2 format. - */ int buffer_put_bignum2_ret(Buffer *buffer, const BIGNUM *value) { - u_int bytes; - u_char *buf; - int oi; - u_int hasnohigh = 0; + int ret; - if (BN_is_zero(value)) { - buffer_put_int(buffer, 0); - return 0; + if ((ret = sshbuf_put_bignum2(buffer, value)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - if (value->neg) { - error("buffer_put_bignum2_ret: negative numbers not supported"); - return (-1); - } - bytes = BN_num_bytes(value) + 1; /* extra padding byte */ - if (bytes < 2) { - error("buffer_put_bignum2_ret: BN too small"); - return (-1); - } - buf = xmalloc(bytes); - buf[0] = 0x00; - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf+1); - if (oi < 0 || (u_int)oi != bytes - 1) { - error("buffer_put_bignum2_ret: BN_bn2bin() failed: " - "oi %d != bin_size %d", oi, bytes); - xfree(buf); - return (-1); - } - hasnohigh = (buf[1] & 0x80) ? 0 : 1; - buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh); - memset(buf, 0, bytes); - xfree(buf); - return (0); + return 0; } void buffer_put_bignum2(Buffer *buffer, const BIGNUM *value) { if (buffer_put_bignum2_ret(buffer, value) == -1) - fatal("buffer_put_bignum2: buffer error"); + fatal("%s: buffer error", __func__); } int buffer_get_bignum2_ret(Buffer *buffer, BIGNUM *value) { - u_int len; - u_char *bin; + int ret; - if ((bin = buffer_get_string_ret(buffer, &len)) == NULL) { - error("buffer_get_bignum2_ret: invalid bignum"); - return (-1); + if ((ret = sshbuf_get_bignum2(buffer, value)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - - if (len > 0 && (bin[0] & 0x80)) { - error("buffer_get_bignum2_ret: negative numbers not supported"); - xfree(bin); - return (-1); - } - if (len > 8 * 1024) { - error("buffer_get_bignum2_ret: cannot handle BN of size %d", - len); - xfree(bin); - return (-1); - } - if (BN_bin2bn(bin, len, value) == NULL) { - error("buffer_get_bignum2_ret: BN_bin2bn failed"); - xfree(bin); - return (-1); - } - xfree(bin); - return (0); + return 0; } void buffer_get_bignum2(Buffer *buffer, BIGNUM *value) { if (buffer_get_bignum2_ret(buffer, value) == -1) - fatal("buffer_get_bignum2: buffer error"); + fatal("%s: buffer error", __func__); } + +#endif /* WITH_OPENSSL */ diff --git a/bufec.c b/bufec.c index 3dcb494..749ce9d 100644 --- a/bufec.c +++ b/bufec.c @@ -1,6 +1,7 @@ -/* $OpenBSD: bufec.c,v 1.1 2010/08/31 11:54:45 djm Exp $ */ +/* $OpenBSD: bufec.c,v 1.4 2014/04/30 05:29:56 djm Exp $ */ + /* - * Copyright (c) 2010 Damien Miller + * Copyright (c) 2012 Damien Miller * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -15,73 +16,29 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ -#include "includes.h" +/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ -#ifdef OPENSSL_HAS_ECC +#include "includes.h" #include -#include -#include - -#include -#include - -#include "xmalloc.h" #include "buffer.h" #include "log.h" -#include "misc.h" +#include "ssherr.h" -/* - * Maximum supported EC GFp field length is 528 bits. SEC1 uncompressed - * encoding represents this as two bitstring points that should each - * be no longer than the field length, SEC1 specifies a 1 byte - * point type header. - * Being paranoid here may insulate us to parsing problems in - * EC_POINT_oct2point. - */ -#define BUFFER_MAX_ECPOINT_LEN ((528*2 / 8) + 1) +#ifdef OPENSSL_HAS_ECC -/* - * Append an EC_POINT to the buffer as a string containing a SEC1 encoded - * uncompressed point. Fortunately OpenSSL handles the gory details for us. - */ int buffer_put_ecpoint_ret(Buffer *buffer, const EC_GROUP *curve, const EC_POINT *point) { - u_char *buf = NULL; - size_t len; - BN_CTX *bnctx; - int ret = -1; + int ret; - /* Determine length */ - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - len = EC_POINT_point2oct(curve, point, POINT_CONVERSION_UNCOMPRESSED, - NULL, 0, bnctx); - if (len > BUFFER_MAX_ECPOINT_LEN) { - error("%s: giant EC point: len = %lu (max %u)", - __func__, (u_long)len, BUFFER_MAX_ECPOINT_LEN); - goto out; + if ((ret = sshbuf_put_ec(buffer, point, curve)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - /* Convert */ - buf = xmalloc(len); - if (EC_POINT_point2oct(curve, point, POINT_CONVERSION_UNCOMPRESSED, - buf, len, bnctx) != len) { - error("%s: EC_POINT_point2oct length mismatch", __func__); - goto out; - } - /* Append */ - buffer_put_string(buffer, buf, len); - ret = 0; - out: - if (buf != NULL) { - bzero(buf, len); - xfree(buf); - } - BN_CTX_free(bnctx); - return ret; + return 0; } void @@ -96,43 +53,13 @@ int buffer_get_ecpoint_ret(Buffer *buffer, const EC_GROUP *curve, EC_POINT *point) { - u_char *buf; - u_int len; - BN_CTX *bnctx; - int ret = -1; + int ret; - if ((buf = buffer_get_string_ret(buffer, &len)) == NULL) { - error("%s: invalid point", __func__); + if ((ret = sshbuf_get_ec(buffer, point, curve)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); return -1; } - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - if (len > BUFFER_MAX_ECPOINT_LEN) { - error("%s: EC_POINT too long: %u > max %u", __func__, - len, BUFFER_MAX_ECPOINT_LEN); - goto out; - } - if (len == 0) { - error("%s: EC_POINT buffer is empty", __func__); - goto out; - } - if (buf[0] != POINT_CONVERSION_UNCOMPRESSED) { - error("%s: EC_POINT is in an incorrect form: " - "0x%02x (want 0x%02x)", __func__, buf[0], - POINT_CONVERSION_UNCOMPRESSED); - goto out; - } - if (EC_POINT_oct2point(curve, point, buf, len, bnctx) != 1) { - error("buffer_get_bignum2_ret: BN_bin2bn failed"); - goto out; - } - /* EC_POINT_oct2point verifies that the point is on the curve for us */ - ret = 0; - out: - BN_CTX_free(bnctx); - bzero(buf, len); - xfree(buf); - return ret; + return 0; } void @@ -144,3 +71,4 @@ buffer_get_ecpoint(Buffer *buffer, const EC_GROUP *curve, } #endif /* OPENSSL_HAS_ECC */ + diff --git a/buffer.c b/buffer.c index ae97003..c5f708a 100644 --- a/buffer.c +++ b/buffer.c @@ -1,252 +1,118 @@ -/* $OpenBSD: buffer.c,v 1.32 2010/02/09 03:56:28 djm Exp $ */ +/* $OpenBSD: buffer.c,v 1.36 2014/04/30 05:29:56 djm Exp $ */ + /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved - * Functions for manipulating fifo buffers (that can grow if needed). + * Copyright (c) 2012 Damien Miller * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ + #include "includes.h" -#include +#include -#include -#include -#include - -#include "xmalloc.h" #include "buffer.h" #include "log.h" - -#define BUFFER_MAX_CHUNK 0x100000 -#define BUFFER_MAX_LEN 0xa00000 -#define BUFFER_ALLOCSZ 0x008000 - -/* Initializes the buffer structure. */ - -void -buffer_init(Buffer *buffer) -{ - const u_int len = 4096; - - buffer->alloc = 0; - buffer->buf = xmalloc(len); - buffer->alloc = len; - buffer->offset = 0; - buffer->end = 0; -} - -/* Frees any memory used for the buffer. */ - -void -buffer_free(Buffer *buffer) -{ - if (buffer->alloc > 0) { - memset(buffer->buf, 0, buffer->alloc); - buffer->alloc = 0; - xfree(buffer->buf); - } -} - -/* - * Clears any data from the buffer, making it empty. This does not actually - * zero the memory. - */ - -void -buffer_clear(Buffer *buffer) -{ - buffer->offset = 0; - buffer->end = 0; -} - -/* Appends data to the buffer, expanding it if necessary. */ +#include "ssherr.h" void buffer_append(Buffer *buffer, const void *data, u_int len) { - void *p; - p = buffer_append_space(buffer, len); - memcpy(p, data, len); -} + int ret; -static int -buffer_compact(Buffer *buffer) -{ - /* - * If the buffer is quite empty, but all data is at the end, move the - * data to the beginning. - */ - if (buffer->offset > MIN(buffer->alloc, BUFFER_MAX_CHUNK)) { - memmove(buffer->buf, buffer->buf + buffer->offset, - buffer->end - buffer->offset); - buffer->end -= buffer->offset; - buffer->offset = 0; - return (1); - } - return (0); + if ((ret = sshbuf_put(buffer, data, len)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); } -/* - * Appends space to the buffer, expanding the buffer if necessary. This does - * not actually copy the data into the buffer, but instead returns a pointer - * to the allocated region. - */ - void * buffer_append_space(Buffer *buffer, u_int len) { - u_int newlen; - void *p; + int ret; + u_char *p; - if (len > BUFFER_MAX_CHUNK) - fatal("buffer_append_space: len %u not supported", len); - - /* If the buffer is empty, start using it from the beginning. */ - if (buffer->offset == buffer->end) { - buffer->offset = 0; - buffer->end = 0; - } -restart: - /* If there is enough space to store all data, store it now. */ - if (buffer->end + len < buffer->alloc) { - p = buffer->buf + buffer->end; - buffer->end += len; - return p; - } - - /* Compact data back to the start of the buffer if necessary */ - if (buffer_compact(buffer)) - goto restart; - - /* Increase the size of the buffer and retry. */ - newlen = roundup(buffer->alloc + len, BUFFER_ALLOCSZ); - if (newlen > BUFFER_MAX_LEN) - fatal("buffer_append_space: alloc %u not supported", - newlen); - buffer->buf = xrealloc(buffer->buf, 1, newlen); - buffer->alloc = newlen; - goto restart; - /* NOTREACHED */ + if ((ret = sshbuf_reserve(buffer, len, &p)) != 0) + fatal("%s: %s", __func__, ssh_err(ret)); + return p; } -/* - * Check whether an allocation of 'len' will fit in the buffer - * This must follow the same math as buffer_append_space - */ int buffer_check_alloc(Buffer *buffer, u_int len) { - if (buffer->offset == buffer->end) { - buffer->offset = 0; - buffer->end = 0; - } - restart: - if (buffer->end + len < buffer->alloc) - return (1); - if (buffer_compact(buffer)) - goto restart; - if (roundup(buffer->alloc + len, BUFFER_ALLOCSZ) <= BUFFER_MAX_LEN) - return (1); - return (0); + int ret = sshbuf_check_reserve(buffer, len); + + if (ret == 0) + return 1; + if (ret == SSH_ERR_NO_BUFFER_SPACE) + return 0; + fatal("%s: %s", __func__, ssh_err(ret)); } -/* Returns the number of bytes of data in the buffer. */ - -u_int -buffer_len(const Buffer *buffer) -{ - return buffer->end - buffer->offset; -} - -/* Gets data from the beginning of the buffer. */ - int buffer_get_ret(Buffer *buffer, void *buf, u_int len) { - if (len > buffer->end - buffer->offset) { - error("buffer_get_ret: trying to get more bytes %d than in buffer %d", - len, buffer->end - buffer->offset); - return (-1); + int ret; + + if ((ret = sshbuf_get(buffer, buf, len)) != 0) { + error("%s: %s", __func__, ssh_err(ret)); + return -1; } - memcpy(buf, buffer->buf + buffer->offset, len); - buffer->offset += len; - return (0); + return 0; } void buffer_get(Buffer *buffer, void *buf, u_int len) { if (buffer_get_ret(buffer, buf, len) == -1) - fatal("buffer_get: buffer error"); + fatal("%s: buffer error", __func__); } -/* Consumes the given number of bytes from the beginning of the buffer. */ - int buffer_consume_ret(Buffer *buffer, u_int bytes) { - if (bytes > buffer->end - buffer->offset) { - error("buffer_consume_ret: trying to get more bytes than in buffer"); - return (-1); - } - buffer->offset += bytes; - return (0); + int ret = sshbuf_consume(buffer, bytes); + + if (ret == 0) + return 0; + if (ret == SSH_ERR_MESSAGE_INCOMPLETE) + return -1; + fatal("%s: %s", __func__, ssh_err(ret)); } void buffer_consume(Buffer *buffer, u_int bytes) { if (buffer_consume_ret(buffer, bytes) == -1) - fatal("buffer_consume: buffer error"); + fatal("%s: buffer error", __func__); } -/* Consumes the given number of bytes from the end of the buffer. */ - int buffer_consume_end_ret(Buffer *buffer, u_int bytes) { - if (bytes > buffer->end - buffer->offset) - return (-1); - buffer->end -= bytes; - return (0); + int ret = sshbuf_consume_end(buffer, bytes); + + if (ret == 0) + return 0; + if (ret == SSH_ERR_MESSAGE_INCOMPLETE) + return -1; + fatal("%s: %s", __func__, ssh_err(ret)); } void buffer_consume_end(Buffer *buffer, u_int bytes) { if (buffer_consume_end_ret(buffer, bytes) == -1) - fatal("buffer_consume_end: trying to get more bytes than in buffer"); + fatal("%s: buffer error", __func__); } -/* Returns a pointer to the first used byte in the buffer. */ -void * -buffer_ptr(const Buffer *buffer) -{ - return buffer->buf + buffer->offset; -} - -/* Dumps the contents of the buffer to stderr. */ - -void -buffer_dump(const Buffer *buffer) -{ - u_int i; - u_char *ucp = buffer->buf; - - for (i = buffer->offset; i < buffer->end; i++) { - fprintf(stderr, "%02x", ucp[i]); - if ((i-buffer->offset)%16==15) - fprintf(stderr, "\r\n"); - else if ((i-buffer->offset)%2==1) - fprintf(stderr, " "); - } - fprintf(stderr, "\r\n"); -} diff --git a/buffer.h b/buffer.h index 2567a3a..d604d79 100644 --- a/buffer.h +++ b/buffer.h @@ -1,57 +1,59 @@ -/* $OpenBSD: buffer.h,v 1.21 2010/08/31 11:54:45 djm Exp $ */ +/* $OpenBSD: buffer.h,v 1.25 2014/04/30 05:29:56 djm Exp $ */ /* - * Author: Tatu Ylonen - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * All rights reserved - * Code for manipulating FIFO buffers. + * Copyright (c) 2012 Damien Miller * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ + #ifndef BUFFER_H #define BUFFER_H -typedef struct { - u_char *buf; /* Buffer for data. */ - u_int alloc; /* Number of bytes allocated for data. */ - u_int offset; /* Offset of first byte containing data. */ - u_int end; /* Offset of last byte containing data. */ -} Buffer; +#include "sshbuf.h" -void buffer_init(Buffer *); -void buffer_clear(Buffer *); -void buffer_free(Buffer *); +typedef struct sshbuf Buffer; -u_int buffer_len(const Buffer *); -void *buffer_ptr(const Buffer *); +#define buffer_init(b) sshbuf_init(b) +#define buffer_clear(b) sshbuf_reset(b) +#define buffer_free(b) sshbuf_free(b) +#define buffer_dump(b) sshbuf_dump(b, stderr) + +/* XXX cast is safe: sshbuf never stores more than len 2^31 */ +#define buffer_len(b) ((u_int) sshbuf_len(b)) +#define buffer_ptr(b) sshbuf_mutable_ptr(b) void buffer_append(Buffer *, const void *, u_int); void *buffer_append_space(Buffer *, u_int); - int buffer_check_alloc(Buffer *, u_int); - void buffer_get(Buffer *, void *, u_int); void buffer_consume(Buffer *, u_int); void buffer_consume_end(Buffer *, u_int); -void buffer_dump(const Buffer *); int buffer_get_ret(Buffer *, void *, u_int); int buffer_consume_ret(Buffer *, u_int); int buffer_consume_end_ret(Buffer *, u_int); +#include #include - void buffer_put_bignum(Buffer *, const BIGNUM *); void buffer_put_bignum2(Buffer *, const BIGNUM *); void buffer_get_bignum(Buffer *, BIGNUM *); void buffer_get_bignum2(Buffer *, BIGNUM *); +void buffer_put_bignum2_from_string(Buffer *, const u_char *, u_int); u_short buffer_get_short(Buffer *); void buffer_put_short(Buffer *, u_short); @@ -66,7 +68,7 @@ int buffer_get_char(Buffer *); void buffer_put_char(Buffer *, int); void *buffer_get_string(Buffer *, u_int *); -void *buffer_get_string_ptr(Buffer *, u_int *); +const void *buffer_get_string_ptr(Buffer *, u_int *); void buffer_put_string(Buffer *, const void *, u_int); char *buffer_get_cstring(Buffer *, u_int *); void buffer_put_cstring(Buffer *, const char *); @@ -79,8 +81,7 @@ void buffer_put_cstring(Buffer *, const char *); #endif /* WIN32_FIXME */ -#define buffer_skip_string(b) \ - do { u_int l = buffer_get_int(b); buffer_consume(b, l); } while (0) +#define buffer_skip_string(b) (void)buffer_get_string_ptr(b, NULL); int buffer_put_bignum_ret(Buffer *, const BIGNUM *); int buffer_get_bignum_ret(Buffer *, BIGNUM *); @@ -91,16 +92,16 @@ int buffer_get_int_ret(u_int *, Buffer *); int buffer_get_int64_ret(u_int64_t *, Buffer *); void *buffer_get_string_ret(Buffer *, u_int *); char *buffer_get_cstring_ret(Buffer *, u_int *); -void *buffer_get_string_ptr_ret(Buffer *, u_int *); +const void *buffer_get_string_ptr_ret(Buffer *, u_int *); int buffer_get_char_ret(char *, Buffer *); #ifdef OPENSSL_HAS_ECC #include - int buffer_put_ecpoint_ret(Buffer *, const EC_GROUP *, const EC_POINT *); void buffer_put_ecpoint(Buffer *, const EC_GROUP *, const EC_POINT *); int buffer_get_ecpoint_ret(Buffer *, const EC_GROUP *, EC_POINT *); void buffer_get_ecpoint(Buffer *, const EC_GROUP *, EC_POINT *); #endif -#endif /* BUFFER_H */ +#endif /* BUFFER_H */ + diff --git a/canohost.c b/canohost.c index dabd8a3..223964e 100644 --- a/canohost.c +++ b/canohost.c @@ -1,4 +1,4 @@ -/* $OpenBSD: canohost.c,v 1.66 2010/01/13 01:20:20 dtucker Exp $ */ +/* $OpenBSD: canohost.c,v 1.72 2015/03/01 15:44:40 millert Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -16,11 +16,11 @@ #include #include +#include #include #include -#include #include #include #include @@ -41,14 +41,13 @@ static int cached_port = -1; /* * Return the canonical name of the host at the other end of the socket. The - * caller should free the returned string with xfree. + * caller should free the returned string. */ static char * get_remote_hostname(int sock, int use_dns) { struct sockaddr_storage from; - int i; socklen_t fromlen; struct addrinfo hints, *ai, *aitop; char name[NI_MAXHOST], ntop[NI_MAXHOST], ntop2[NI_MAXHOST]; @@ -99,13 +98,9 @@ get_remote_hostname(int sock, int use_dns) return xstrdup(ntop); } - /* - * Convert it to all lowercase (which is expected by the rest - * of this software). - */ - for (i = 0; name[i]; i++) - if (isupper(name[i])) - name[i] = (char)tolower(name[i]); + /* Names are stores in lowercase. */ + lowercase(name); + /* * Map it back to an IP address and check that the given * address actually is an address of this host. This is @@ -160,8 +155,7 @@ check_ip_options(int sock, char *ipaddr) #ifdef IP_OPTIONS u_char options[200]; char text[sizeof(options) * 3 + 1]; - socklen_t option_size; - u_int i; + socklen_t option_size, i; int ipproto; struct protoent *ip; @@ -199,7 +193,7 @@ ipv64_normalise_mapped(struct sockaddr_storage *addr, socklen_t *len) memcpy(&inaddr, ((char *)&a6->sin6_addr) + 12, sizeof(inaddr)); port = a6->sin6_port; - bzero(a4, sizeof(*a4)); + memset(a4, 0, sizeof(*a4)); a4->sin_family = AF_INET; *len = sizeof(*a4); @@ -266,19 +260,29 @@ get_socket_address(int sock, int remote, int flags) } /* Work around Linux IPv6 weirdness */ - if (addr.ss_family == AF_INET6) + if (addr.ss_family == AF_INET6) { addrlen = sizeof(struct sockaddr_in6); + ipv64_normalise_mapped(&addr, &addrlen); + } - ipv64_normalise_mapped(&addr, &addrlen); - - /* Get the address in ascii. */ - if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop, - sizeof(ntop), NULL, 0, flags)) != 0) { - error("get_socket_address: getnameinfo %d failed: %s", flags, - ssh_gai_strerror(r)); + switch (addr.ss_family) { + case AF_INET: + case AF_INET6: + /* Get the address in ascii. */ + if ((r = getnameinfo((struct sockaddr *)&addr, addrlen, ntop, + sizeof(ntop), NULL, 0, flags)) != 0) { + error("get_socket_address: getnameinfo %d failed: %s", + flags, ssh_gai_strerror(r)); + return NULL; + } + return xstrdup(ntop); + case AF_UNIX: + /* Get the Unix domain socket path. */ + return xstrdup(((struct sockaddr_un *)&addr)->sun_path); + default: + /* We can't look up remote Unix domain sockets. */ return NULL; } - return xstrdup(ntop); } char * @@ -323,10 +327,8 @@ get_local_name(int fd) void clear_cached_addr(void) { - if (canonical_host_ip != NULL) { - xfree(canonical_host_ip); - canonical_host_ip = NULL; - } + free(canonical_host_ip); + canonical_host_ip = NULL; cached_port = -1; } @@ -393,6 +395,10 @@ get_sock_port(int sock, int local) if (from.ss_family == AF_INET6) fromlen = sizeof(struct sockaddr_in6); + /* Non-inet sockets don't have a port number. */ + if (from.ss_family != AF_INET && from.ss_family != AF_INET6) + return 0; + /* Return port number. */ if ((r = getnameinfo((struct sockaddr *)&from, fromlen, NULL, 0, strport, sizeof(strport), NI_NUMERICSERV)) != 0) diff --git a/chacha.c b/chacha.c new file mode 100644 index 0000000..a84c25e --- /dev/null +++ b/chacha.c @@ -0,0 +1,219 @@ +/* +chacha-merged.c version 20080118 +D. J. Bernstein +Public domain. +*/ + +#include "includes.h" + +#include "chacha.h" + +/* $OpenBSD: chacha.c,v 1.1 2013/11/21 00:45:44 djm Exp $ */ + +typedef unsigned char u8; +typedef unsigned int u32; + +typedef struct chacha_ctx chacha_ctx; + +#define U8C(v) (v##U) +#define U32C(v) (v##U) + +#define U8V(v) ((u8)(v) & U8C(0xFF)) +#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF)) + +#define ROTL32(v, n) \ + (U32V((v) << (n)) | ((v) >> (32 - (n)))) + +#define U8TO32_LITTLE(p) \ + (((u32)((p)[0]) ) | \ + ((u32)((p)[1]) << 8) | \ + ((u32)((p)[2]) << 16) | \ + ((u32)((p)[3]) << 24)) + +#define U32TO8_LITTLE(p, v) \ + do { \ + (p)[0] = U8V((v) ); \ + (p)[1] = U8V((v) >> 8); \ + (p)[2] = U8V((v) >> 16); \ + (p)[3] = U8V((v) >> 24); \ + } while (0) + +#define ROTATE(v,c) (ROTL32(v,c)) +#define XOR(v,w) ((v) ^ (w)) +#define PLUS(v,w) (U32V((v) + (w))) +#define PLUSONE(v) (PLUS((v),1)) + +#define QUARTERROUND(a,b,c,d) \ + a = PLUS(a,b); d = ROTATE(XOR(d,a),16); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c),12); \ + a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c), 7); + +static const char sigma[16] = "expand 32-byte k"; +static const char tau[16] = "expand 16-byte k"; + +void +chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits) +{ + const char *constants; + + x->input[4] = U8TO32_LITTLE(k + 0); + x->input[5] = U8TO32_LITTLE(k + 4); + x->input[6] = U8TO32_LITTLE(k + 8); + x->input[7] = U8TO32_LITTLE(k + 12); + if (kbits == 256) { /* recommended */ + k += 16; + constants = sigma; + } else { /* kbits == 128 */ + constants = tau; + } + x->input[8] = U8TO32_LITTLE(k + 0); + x->input[9] = U8TO32_LITTLE(k + 4); + x->input[10] = U8TO32_LITTLE(k + 8); + x->input[11] = U8TO32_LITTLE(k + 12); + x->input[0] = U8TO32_LITTLE(constants + 0); + x->input[1] = U8TO32_LITTLE(constants + 4); + x->input[2] = U8TO32_LITTLE(constants + 8); + x->input[3] = U8TO32_LITTLE(constants + 12); +} + +void +chacha_ivsetup(chacha_ctx *x, const u8 *iv, const u8 *counter) +{ + x->input[12] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 0); + x->input[13] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 4); + x->input[14] = U8TO32_LITTLE(iv + 0); + x->input[15] = U8TO32_LITTLE(iv + 4); +} + +void +chacha_encrypt_bytes(chacha_ctx *x,const u8 *m,u8 *c,u32 bytes) +{ + u32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15; + u32 j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14, j15; + u8 *ctarget = NULL; + u8 tmp[64]; + u_int i; + + if (!bytes) return; + + j0 = x->input[0]; + j1 = x->input[1]; + j2 = x->input[2]; + j3 = x->input[3]; + j4 = x->input[4]; + j5 = x->input[5]; + j6 = x->input[6]; + j7 = x->input[7]; + j8 = x->input[8]; + j9 = x->input[9]; + j10 = x->input[10]; + j11 = x->input[11]; + j12 = x->input[12]; + j13 = x->input[13]; + j14 = x->input[14]; + j15 = x->input[15]; + + for (;;) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) tmp[i] = m[i]; + m = tmp; + ctarget = c; + c = tmp; + } + x0 = j0; + x1 = j1; + x2 = j2; + x3 = j3; + x4 = j4; + x5 = j5; + x6 = j6; + x7 = j7; + x8 = j8; + x9 = j9; + x10 = j10; + x11 = j11; + x12 = j12; + x13 = j13; + x14 = j14; + x15 = j15; + for (i = 20;i > 0;i -= 2) { + QUARTERROUND( x0, x4, x8,x12) + QUARTERROUND( x1, x5, x9,x13) + QUARTERROUND( x2, x6,x10,x14) + QUARTERROUND( x3, x7,x11,x15) + QUARTERROUND( x0, x5,x10,x15) + QUARTERROUND( x1, x6,x11,x12) + QUARTERROUND( x2, x7, x8,x13) + QUARTERROUND( x3, x4, x9,x14) + } + x0 = PLUS(x0,j0); + x1 = PLUS(x1,j1); + x2 = PLUS(x2,j2); + x3 = PLUS(x3,j3); + x4 = PLUS(x4,j4); + x5 = PLUS(x5,j5); + x6 = PLUS(x6,j6); + x7 = PLUS(x7,j7); + x8 = PLUS(x8,j8); + x9 = PLUS(x9,j9); + x10 = PLUS(x10,j10); + x11 = PLUS(x11,j11); + x12 = PLUS(x12,j12); + x13 = PLUS(x13,j13); + x14 = PLUS(x14,j14); + x15 = PLUS(x15,j15); + + x0 = XOR(x0,U8TO32_LITTLE(m + 0)); + x1 = XOR(x1,U8TO32_LITTLE(m + 4)); + x2 = XOR(x2,U8TO32_LITTLE(m + 8)); + x3 = XOR(x3,U8TO32_LITTLE(m + 12)); + x4 = XOR(x4,U8TO32_LITTLE(m + 16)); + x5 = XOR(x5,U8TO32_LITTLE(m + 20)); + x6 = XOR(x6,U8TO32_LITTLE(m + 24)); + x7 = XOR(x7,U8TO32_LITTLE(m + 28)); + x8 = XOR(x8,U8TO32_LITTLE(m + 32)); + x9 = XOR(x9,U8TO32_LITTLE(m + 36)); + x10 = XOR(x10,U8TO32_LITTLE(m + 40)); + x11 = XOR(x11,U8TO32_LITTLE(m + 44)); + x12 = XOR(x12,U8TO32_LITTLE(m + 48)); + x13 = XOR(x13,U8TO32_LITTLE(m + 52)); + x14 = XOR(x14,U8TO32_LITTLE(m + 56)); + x15 = XOR(x15,U8TO32_LITTLE(m + 60)); + + j12 = PLUSONE(j12); + if (!j12) { + j13 = PLUSONE(j13); + /* stopping at 2^70 bytes per nonce is user's responsibility */ + } + + U32TO8_LITTLE(c + 0,x0); + U32TO8_LITTLE(c + 4,x1); + U32TO8_LITTLE(c + 8,x2); + U32TO8_LITTLE(c + 12,x3); + U32TO8_LITTLE(c + 16,x4); + U32TO8_LITTLE(c + 20,x5); + U32TO8_LITTLE(c + 24,x6); + U32TO8_LITTLE(c + 28,x7); + U32TO8_LITTLE(c + 32,x8); + U32TO8_LITTLE(c + 36,x9); + U32TO8_LITTLE(c + 40,x10); + U32TO8_LITTLE(c + 44,x11); + U32TO8_LITTLE(c + 48,x12); + U32TO8_LITTLE(c + 52,x13); + U32TO8_LITTLE(c + 56,x14); + U32TO8_LITTLE(c + 60,x15); + + if (bytes <= 64) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) ctarget[i] = c[i]; + } + x->input[12] = j12; + x->input[13] = j13; + return; + } + bytes -= 64; + c += 64; + m += 64; + } +} diff --git a/chacha.h b/chacha.h new file mode 100644 index 0000000..40eaf2d --- /dev/null +++ b/chacha.h @@ -0,0 +1,35 @@ +/* $OpenBSD: chacha.h,v 1.3 2014/05/02 03:27:54 djm Exp $ */ + +/* +chacha-merged.c version 20080118 +D. J. Bernstein +Public domain. +*/ + +#ifndef CHACHA_H +#define CHACHA_H + +#include + +struct chacha_ctx { + u_int input[16]; +}; + +#define CHACHA_MINKEYLEN 16 +#define CHACHA_NONCELEN 8 +#define CHACHA_CTRLEN 8 +#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN) +#define CHACHA_BLOCKLEN 64 + +void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits) + __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN))); +void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr) + __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN))) + __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN))); +void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m, + u_char *c, u_int bytes) + __attribute__((__bounded__(__buffer__, 2, 4))) + __attribute__((__bounded__(__buffer__, 3, 4))); + +#endif /* CHACHA_H */ + diff --git a/channels.c b/channels.c index ea17570..11c71a2 100644 --- a/channels.c +++ b/channels.c @@ -1,4 +1,4 @@ -/* $OpenBSD: channels.c,v 1.311 2011/06/22 22:08:42 djm Exp $ */ +/* $OpenBSD: channels.c,v 1.347 2015/07/01 02:26:31 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -41,7 +41,15 @@ #include "includes.h" +#ifdef WIN32_FIXME + #define ECONNABORTED WSAECONNABORTED + #define ECONNREFUSED WSAECONNREFUSED +#endif + + #include +#include /* MIN MAX */ +#include #include #include #include @@ -55,6 +63,9 @@ #include #include #include +#ifdef HAVE_STDINT_H +#include +#endif #include #include #include @@ -82,6 +93,7 @@ #define isatty(a) WSHELPisatty(a) #endif + /* -- channel core */ /* @@ -111,10 +123,15 @@ static int channel_max_fd = 0; * a corrupt remote server from accessing arbitrary TCP/IP ports on our local * network (which might be behind a firewall). */ +/* XXX: streamlocal wants a path instead of host:port */ +/* Overload host_to_connect; we could just make this match Forward */ +/* XXX - can we use listen_host instead of listen_path? */ typedef struct { char *host_to_connect; /* Connect to 'host'. */ - u_short port_to_connect; /* Connect to 'port'. */ - u_short listen_port; /* Remote side should listen port number. */ + int port_to_connect; /* Connect to 'port'. */ + char *listen_host; /* Remote side should listen address. */ + char *listen_path; /* Remote side should listen path. */ + int listen_port; /* Remote side should listen port. */ } ForwardPermission; /* List of all permitted host/port pairs to connect by the user. */ @@ -129,6 +146,9 @@ static int num_permitted_opens = 0; /* Number of permitted host/port pair in the array permitted by the admin. */ static int num_adm_permitted_opens = 0; +/* special-case port number meaning allow any port */ +#define FWD_PERMIT_ANY_PORT 0 + /* * If this is true, all opens are permitted. This is the case on the server * on which we have to trust the client anyway, and the user could do @@ -152,6 +172,9 @@ static char *x11_saved_proto = NULL; static char *x11_saved_data = NULL; static u_int x11_saved_data_len = 0; +/* Deadline after which all X11 connections are refused */ +static u_int x11_refuse_time; + /* * Fake X11 authentication data. This is what the server will be sending us; * we should replace any occurrences of this by the real data. @@ -214,6 +237,7 @@ channel_lookup(int id) case SSH_CHANNEL_OPEN: case SSH_CHANNEL_INPUT_DRAINING: case SSH_CHANNEL_OUTPUT_DRAINING: + case SSH_CHANNEL_ABANDONED: return (c); } logit("Non-public channel %d, type %d.", id, c->type); @@ -250,7 +274,10 @@ channel_register_fds(Channel *c, int rfd, int wfd, int efd, if ((c->isatty = is_tty) != 0) debug2("channel %d: rfd %d isatty", c->self, c->rfd); +#ifdef _AIX + /* XXX: Later AIX versions can't push as much data to tty */ c->wfd_isatty = is_tty || isatty(c->wfd); +#endif /* enable nonblocking mode */ if (nonblock) { @@ -295,7 +322,7 @@ channel_new(char *ctype, int type, int rfd, int wfd, int efd, if (channels_alloc > 10000) fatal("channel_new: internal error: channels_alloc %d " "too big.", channels_alloc); - channels = xrealloc(channels, channels_alloc + 10, + channels = xreallocarray(channels, channels_alloc + 10, sizeof(Channel *)); channels_alloc += 10; debug2("channel: expanding %d", channels_alloc); @@ -308,10 +335,13 @@ channel_new(char *ctype, int type, int rfd, int wfd, int efd, buffer_init(&c->output); buffer_init(&c->extended); c->path = NULL; + c->listening_addr = NULL; + c->listening_port = 0; c->ostate = CHAN_OUTPUT_OPEN; c->istate = CHAN_INPUT_OPEN; c->flags = 0; channel_register_fds(c, rfd, wfd, efd, extusage, nonblock, 0); + c->notbefore = 0; c->self = found; c->type = type; c->ctype = ctype; @@ -401,7 +431,7 @@ channel_free(Channel *c) s = channel_open_message(); debug3("channel %d: status: %s", c->self, s); - xfree(s); + free(s); if (c->sock != -1) shutdown(c->sock, SHUT_RDWR); @@ -409,25 +439,23 @@ channel_free(Channel *c) buffer_free(&c->input); buffer_free(&c->output); buffer_free(&c->extended); - if (c->remote_name) { - xfree(c->remote_name); - c->remote_name = NULL; - } - if (c->path) { - xfree(c->path); - c->path = NULL; - } + free(c->remote_name); + c->remote_name = NULL; + free(c->path); + c->path = NULL; + free(c->listening_addr); + c->listening_addr = NULL; while ((cc = TAILQ_FIRST(&c->status_confirms)) != NULL) { if (cc->abandon_cb != NULL) cc->abandon_cb(c, cc->ctx); TAILQ_REMOVE(&c->status_confirms, cc, entry); - bzero(cc, sizeof(*cc)); - xfree(cc); + explicit_bzero(cc, sizeof(*cc)); + free(cc); } if (c->filter_cleanup != NULL && c->filter_ctx != NULL) c->filter_cleanup(c->self, c->filter_ctx); channels[c->self] = NULL; - xfree(c); + free(c); } void @@ -471,6 +499,8 @@ channel_stop_listening(void) case SSH_CHANNEL_PORT_LISTENER: case SSH_CHANNEL_RPORT_LISTENER: case SSH_CHANNEL_X11_LISTENER: + case SSH_CHANNEL_UNIX_LISTENER: + case SSH_CHANNEL_RUNIX_LISTENER: channel_close_fd(&c->sock); channel_free(c); break; @@ -532,6 +562,9 @@ channel_still_open(void) case SSH_CHANNEL_DYNAMIC: case SSH_CHANNEL_CONNECTING: case SSH_CHANNEL_ZOMBIE: + case SSH_CHANNEL_ABANDONED: + case SSH_CHANNEL_UNIX_LISTENER: + case SSH_CHANNEL_RUNIX_LISTENER: continue; case SSH_CHANNEL_LARVAL: if (!compat20) @@ -577,6 +610,9 @@ channel_find_open(void) case SSH_CHANNEL_OPENING: case SSH_CHANNEL_CONNECTING: case SSH_CHANNEL_ZOMBIE: + case SSH_CHANNEL_ABANDONED: + case SSH_CHANNEL_UNIX_LISTENER: + case SSH_CHANNEL_RUNIX_LISTENER: continue; case SSH_CHANNEL_LARVAL: case SSH_CHANNEL_AUTH_SOCKET: @@ -624,8 +660,11 @@ channel_open_message(void) case SSH_CHANNEL_CLOSED: case SSH_CHANNEL_AUTH_SOCKET: case SSH_CHANNEL_ZOMBIE: + case SSH_CHANNEL_ABANDONED: case SSH_CHANNEL_MUX_CLIENT: case SSH_CHANNEL_MUX_LISTENER: + case SSH_CHANNEL_UNIX_LISTENER: + case SSH_CHANNEL_RUNIX_LISTENER: continue; case SSH_CHANNEL_LARVAL: case SSH_CHANNEL_OPENING: @@ -650,7 +689,7 @@ channel_open_message(void) } } buffer_append(&buffer, "\0", 1); - cp = xstrdup(buffer_ptr(&buffer)); + cp = xstrdup((char *)buffer_ptr(&buffer)); buffer_free(&buffer); return cp; } @@ -699,7 +738,7 @@ channel_register_status_confirm(int id, channel_confirm_cb *cb, if ((c = channel_lookup(id)) == NULL) fatal("channel_register_expect: %d: bad id", id); - cc = xmalloc(sizeof(*cc)); + cc = xcalloc(1, sizeof(*cc)); cc->cb = cb; cc->abandon_cb = abandon_cb; cc->ctx = ctx; @@ -889,6 +928,13 @@ x11_open_helper(Buffer *b) u_char *ucp; u_int proto_len, data_len; + /* Is this being called after the refusal deadline? */ + if (x11_refuse_time != 0 && (u_int)monotime() >= x11_refuse_time) { + verbose("Rejected X11 connection after ForwardX11Timeout " + "expired"); + return -1; + } + /* Check if the fixed size part of the packet is in buffer. */ if (buffer_len(b) < 12) return 0; @@ -1036,7 +1082,7 @@ channel_decode_socks4(Channel *c, fd_set *readset, fd_set *writeset) len = sizeof(s4_req); if (have < len) return 0; - p = buffer_ptr(&c->input); + p = (char *)buffer_ptr(&c->input); need = 1; /* SOCKS4A uses an invalid IP address 0.0.0.x */ @@ -1066,7 +1112,10 @@ channel_decode_socks4(Channel *c, fd_set *readset, fd_set *writeset) buffer_get(&c->input, (char *)&s4_req.dest_port, 2); buffer_get(&c->input, (char *)&s4_req.dest_addr, 4); have = buffer_len(&c->input); - p = buffer_ptr(&c->input); + p = (char *)buffer_ptr(&c->input); + if (memchr(p, '\0', have) == NULL) + fatal("channel %d: decode socks4: user not nul terminated", + c->self); len = strlen(p); debug2("channel %d: decode socks4: user %s/%d", c->self, p, len); len++; /* trailing '\0' */ @@ -1076,16 +1125,14 @@ channel_decode_socks4(Channel *c, fd_set *readset, fd_set *writeset) strlcpy(username, p, sizeof(username)); buffer_consume(&c->input, len); - if (c->path != NULL) { - xfree(c->path); - c->path = NULL; - } + free(c->path); + c->path = NULL; if (need == 1) { /* SOCKS4: one string */ host = inet_ntoa(s4_req.dest_addr); c->path = xstrdup(host); } else { /* SOCKS4A: two strings */ have = buffer_len(&c->input); - p = buffer_ptr(&c->input); + p = (char *)buffer_ptr(&c->input); len = strlen(p); debug2("channel %d: decode socks4a: host %s/%d", c->self, p, len); @@ -1139,7 +1186,8 @@ channel_decode_socks5(Channel *c, fd_set *readset, fd_set *writeset) u_int8_t atyp; } s5_req, s5_rsp; u_int16_t dest_port; - u_char *p, dest_addr[255+1], ntop[INET6_ADDRSTRLEN]; + char dest_addr[255+1], ntop[INET6_ADDRSTRLEN]; + u_char *p; u_int have, need, i, found, nmethods, addrlen, af; debug2("channel %d: decode socks5", c->self); @@ -1209,13 +1257,11 @@ channel_decode_socks5(Channel *c, fd_set *readset, fd_set *writeset) buffer_consume(&c->input, sizeof(s5_req)); if (s5_req.atyp == SSH_SOCKS5_DOMAIN) buffer_consume(&c->input, 1); /* host string length */ - buffer_get(&c->input, (char *)&dest_addr, addrlen); + buffer_get(&c->input, &dest_addr, addrlen); buffer_get(&c->input, (char *)&dest_port, 2); dest_addr[addrlen] = '\0'; - if (c->path != NULL) { - xfree(c->path); - c->path = NULL; - } + free(c->path); + c->path = NULL; if (s5_req.atyp == SSH_SOCKS5_DOMAIN) { if (addrlen >= NI_MAXHOST) { error("channel %d: dynamic request: socks5 hostname " @@ -1237,11 +1283,10 @@ channel_decode_socks5(Channel *c, fd_set *readset, fd_set *writeset) s5_rsp.command = SSH_SOCKS5_SUCCESS; s5_rsp.reserved = 0; /* ignored */ s5_rsp.atyp = SSH_SOCKS5_IPV4; - ((struct in_addr *)&dest_addr)->s_addr = INADDR_ANY; dest_port = 0; /* ignored */ buffer_append(&c->output, &s5_rsp, sizeof(s5_rsp)); - buffer_append(&c->output, &dest_addr, sizeof(struct in_addr)); + buffer_put_int(&c->output, ntohl(INADDR_ANY)); /* bind address */ buffer_append(&c->output, &dest_port, sizeof(dest_port)); return 1; } @@ -1320,7 +1365,7 @@ channel_post_x11_listener(Channel *c, fd_set *readset, fd_set *writeset) { Channel *nc; struct sockaddr_storage addr; - int newsock; + int newsock, oerrno; socklen_t addrlen; char buf[16384], *remote_ipaddr; int remote_port; @@ -1330,12 +1375,19 @@ channel_post_x11_listener(Channel *c, fd_set *readset, fd_set *writeset) addrlen = sizeof(addr); newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen); if (c->single_connection) { + oerrno = errno; debug2("single_connection: closing X11 listener."); channel_close_fd(&c->sock); chan_mark_dead(c); + errno = oerrno; } if (newsock < 0) { - error("accept: %.100s", strerror(errno)); + if (errno != EINTR && errno != EWOULDBLOCK + && errno != ECONNABORTED + ) + error("accept: %.100s", strerror(errno)); + if (errno == EMFILE || errno == ENFILE) + c->notbefore = monotime() + 1; return; } set_nodelay(newsock); @@ -1369,34 +1421,33 @@ channel_post_x11_listener(Channel *c, fd_set *readset, fd_set *writeset) packet_put_cstring(buf); packet_send(); } - xfree(remote_ipaddr); + free(remote_ipaddr); } } static void port_open_helper(Channel *c, char *rtype) { - int direct; char buf[1024]; + char *local_ipaddr = get_local_ipaddr(c->sock); + int local_port = c->sock == -1 ? 65536 : get_sock_port(c->sock, 1); char *remote_ipaddr = get_peer_ipaddr(c->sock); int remote_port = get_peer_port(c->sock); if (remote_port == -1) { /* Fake addr/port to appease peers that validate it (Tectia) */ - xfree(remote_ipaddr); + free(remote_ipaddr); remote_ipaddr = xstrdup("127.0.0.1"); remote_port = 65535; } - direct = (strcmp(rtype, "direct-tcpip") == 0); - snprintf(buf, sizeof buf, "%s: listening port %d for %.100s port %d, " - "connect from %.200s port %d", + "connect from %.200s port %d to %.100s port %d", rtype, c->listening_port, c->path, c->host_port, - remote_ipaddr, remote_port); + remote_ipaddr, remote_port, local_ipaddr, local_port); - xfree(c->remote_name); + free(c->remote_name); c->remote_name = xstrdup(buf); if (compat20) { @@ -1405,18 +1456,29 @@ port_open_helper(Channel *c, char *rtype) packet_put_int(c->self); packet_put_int(c->local_window_max); packet_put_int(c->local_maxpacket); - if (direct) { + if (strcmp(rtype, "direct-tcpip") == 0) { /* target host, port */ packet_put_cstring(c->path); packet_put_int(c->host_port); + } else if (strcmp(rtype, "direct-streamlocal@openssh.com") == 0) { + /* target path */ + packet_put_cstring(c->path); + } else if (strcmp(rtype, "forwarded-streamlocal@openssh.com") == 0) { + /* listen path */ + packet_put_cstring(c->path); } else { /* listen address, port */ packet_put_cstring(c->path); - packet_put_int(c->listening_port); + packet_put_int(local_port); + } + if (strcmp(rtype, "forwarded-streamlocal@openssh.com") == 0) { + /* reserved for future owner/mode info */ + packet_put_cstring(""); + } else { + /* originator host and port */ + packet_put_cstring(remote_ipaddr); + packet_put_int((u_int)remote_port); } - /* originator host and port */ - packet_put_cstring(remote_ipaddr); - packet_put_int((u_int)remote_port); packet_send(); } else { packet_start(SSH_MSG_PORT_OPEN); @@ -1428,7 +1490,8 @@ port_open_helper(Channel *c, char *rtype) packet_put_cstring(c->remote_name); packet_send(); } - xfree(remote_ipaddr); + free(remote_ipaddr); + free(local_ipaddr); } static void @@ -1444,6 +1507,12 @@ channel_set_reuseaddr(int fd) error("setsockopt SO_REUSEADDR fd %d: %s", fd, strerror(errno)); } +void +channel_set_x11_refuse_time(u_int refuse_time) +{ + x11_refuse_time = refuse_time; +} + /* * This socket is listening for connections to a forwarded TCP/IP port. */ @@ -1465,23 +1534,33 @@ channel_post_port_listener(Channel *c, fd_set *readset, fd_set *writeset) if (c->type == SSH_CHANNEL_RPORT_LISTENER) { nextstate = SSH_CHANNEL_OPENING; rtype = "forwarded-tcpip"; + } else if (c->type == SSH_CHANNEL_RUNIX_LISTENER) { + nextstate = SSH_CHANNEL_OPENING; + rtype = "forwarded-streamlocal@openssh.com"; + } else if (c->host_port == PORT_STREAMLOCAL) { + nextstate = SSH_CHANNEL_OPENING; + rtype = "direct-streamlocal@openssh.com"; + } else if (c->host_port == 0) { + nextstate = SSH_CHANNEL_DYNAMIC; + rtype = "dynamic-tcpip"; } else { - if (c->host_port == 0) { - nextstate = SSH_CHANNEL_DYNAMIC; - rtype = "dynamic-tcpip"; - } else { - nextstate = SSH_CHANNEL_OPENING; - rtype = "direct-tcpip"; - } + nextstate = SSH_CHANNEL_OPENING; + rtype = "direct-tcpip"; } addrlen = sizeof(addr); newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen); if (newsock < 0) { - error("accept: %.100s", strerror(errno)); + if (errno != EINTR && errno != EWOULDBLOCK + && errno != ECONNABORTED + ) + error("accept: %.100s", strerror(errno)); + if (errno == EMFILE || errno == ENFILE) + c->notbefore = monotime() + 1; return; } - set_nodelay(newsock); + if (c->host_port != PORT_STREAMLOCAL) + set_nodelay(newsock); nc = channel_new(rtype, nextstate, newsock, newsock, -1, c->local_window_max, c->local_maxpacket, 0, rtype, 1); nc->listening_port = c->listening_port; @@ -1511,7 +1590,10 @@ channel_post_auth_listener(Channel *c, fd_set *readset, fd_set *writeset) addrlen = sizeof(addr); newsock = accept(c->sock, (struct sockaddr *)&addr, &addrlen); if (newsock < 0) { - error("accept from auth socket: %.100s", strerror(errno)); + error("accept from auth socket: %.100s", + strerror(errno)); + if (errno == EMFILE || errno == ENFILE) + c->notbefore = monotime() + 1; return; } nc = channel_new("accepted auth socket", @@ -1674,7 +1756,7 @@ channel_handle_wfd(Channel *c, fd_set *readset, fd_set *writeset) if (c->datagram) { /* ignore truncated writes, datagrams might get lost */ len = write(c->wfd, buf, dlen); - xfree(data); + free(data); if (len < 0 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK)) return 1; @@ -1916,6 +1998,8 @@ channel_post_mux_listener(Channel *c, fd_set *readset, fd_set *writeset) if ((newsock = accept(c->sock, (struct sockaddr*)&addr, &addrlen)) == -1) { error("%s accept: %s", __func__, strerror(errno)); + if (errno == EMFILE || errno == ENFILE) + c->notbefore = monotime() + 1; return; } @@ -1967,6 +2051,8 @@ channel_handler_init_20(void) channel_pre[SSH_CHANNEL_X11_OPEN] = &channel_pre_x11_open; channel_pre[SSH_CHANNEL_PORT_LISTENER] = &channel_pre_listener; channel_pre[SSH_CHANNEL_RPORT_LISTENER] = &channel_pre_listener; + channel_pre[SSH_CHANNEL_UNIX_LISTENER] = &channel_pre_listener; + channel_pre[SSH_CHANNEL_RUNIX_LISTENER] = &channel_pre_listener; channel_pre[SSH_CHANNEL_X11_LISTENER] = &channel_pre_listener; channel_pre[SSH_CHANNEL_AUTH_SOCKET] = &channel_pre_listener; channel_pre[SSH_CHANNEL_CONNECTING] = &channel_pre_connecting; @@ -1977,6 +2063,8 @@ channel_handler_init_20(void) channel_post[SSH_CHANNEL_OPEN] = &channel_post_open; channel_post[SSH_CHANNEL_PORT_LISTENER] = &channel_post_port_listener; channel_post[SSH_CHANNEL_RPORT_LISTENER] = &channel_post_port_listener; + channel_post[SSH_CHANNEL_UNIX_LISTENER] = &channel_post_port_listener; + channel_post[SSH_CHANNEL_RUNIX_LISTENER] = &channel_post_port_listener; channel_post[SSH_CHANNEL_X11_LISTENER] = &channel_post_x11_listener; channel_post[SSH_CHANNEL_AUTH_SOCKET] = &channel_post_auth_listener; channel_post[SSH_CHANNEL_CONNECTING] = &channel_post_connecting; @@ -2066,16 +2154,21 @@ channel_garbage_collect(Channel *c) } static void -channel_handler(chan_fn *ftab[], fd_set *readset, fd_set *writeset) +channel_handler(chan_fn *ftab[], fd_set *readset, fd_set *writeset, + time_t *unpause_secs) { static int did_init = 0; u_int i, oalloc; Channel *c; + time_t now; if (!did_init) { channel_handler_init(); did_init = 1; } + now = monotime(); + if (unpause_secs != NULL) + *unpause_secs = 0; for (i = 0, oalloc = channels_alloc; i < oalloc; i++) { c = channels[i]; if (c == NULL) @@ -2086,10 +2179,30 @@ channel_handler(chan_fn *ftab[], fd_set *readset, fd_set *writeset) else continue; } - if (ftab[c->type] != NULL) - (*ftab[c->type])(c, readset, writeset); + if (ftab[c->type] != NULL) { + /* + * Run handlers that are not paused. + */ + if (c->notbefore <= now) + (*ftab[c->type])(c, readset, writeset); + else if (unpause_secs != NULL) { + /* + * Collect the time that the earliest + * channel comes off pause. + */ + debug3("%s: chan %d: skip for %d more seconds", + __func__, c->self, + (int)(c->notbefore - now)); + if (*unpause_secs == 0 || + (c->notbefore - now) < *unpause_secs) + *unpause_secs = c->notbefore - now; + } + } channel_garbage_collect(c); } + if (unpause_secs != NULL && *unpause_secs != 0) + debug3("%s: first channel unpauses in %d seconds", + __func__, (int)*unpause_secs); } /* @@ -2098,36 +2211,34 @@ channel_handler(chan_fn *ftab[], fd_set *readset, fd_set *writeset) */ void channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp, - u_int *nallocp, int rekeying) + u_int *nallocp, time_t *minwait_secs, int rekeying) { u_int n, sz, nfdset; n = MAX(*maxfdp, channel_max_fd); - /* * Winsock can't support this sort of fdset reallocation */ - #ifndef WIN32_FIXME - +#ifndef WIN32_FIXME + nfdset = howmany(n+1, NFDBITS); /* Explicitly test here, because xrealloc isn't always called */ - if (nfdset && SIZE_T_MAX / nfdset < sizeof(fd_mask)) + if (nfdset && SIZE_MAX / nfdset < sizeof(fd_mask)) fatal("channel_prepare_select: max_fd (%d) is too large", n); sz = nfdset * sizeof(fd_mask); /* perhaps check sz < nalloc/2 and shrink? */ if (*readsetp == NULL || sz > *nallocp) { - *readsetp = xrealloc(*readsetp, nfdset, sizeof(fd_mask)); - *writesetp = xrealloc(*writesetp, nfdset, sizeof(fd_mask)); + *readsetp = xreallocarray(*readsetp, nfdset, sizeof(fd_mask)); + *writesetp = xreallocarray(*writesetp, nfdset, sizeof(fd_mask)); *nallocp = sz; } +#endif /* WIN32_FIXME */ - #endif /* WIN32_FIXME */ - *maxfdp = n; - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME if (*readsetp == NULL) { @@ -2138,15 +2249,14 @@ channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp, FD_ZERO(*readsetp); FD_ZERO(*writesetp); - #else /* WIN32_FIXME */ - +#else /* WIN32_FIXME */ memset(*readsetp, 0, sz); memset(*writesetp, 0, sz); - - #endif /* else WIN32_FIXME */ - +#endif /* else WIN32_FIXME */ + if (!rekeying) - channel_handler(channel_pre, *readsetp, *writesetp); + channel_handler(channel_pre, *readsetp, *writesetp, + minwait_secs); } /* @@ -2156,7 +2266,7 @@ channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp, void channel_after_select(fd_set *readset, fd_set *writeset) { - channel_handler(channel_post, readset, writeset); + channel_handler(channel_post, readset, writeset, NULL); } @@ -2207,15 +2317,15 @@ channel_output_poll(void) debug("channel %d: datagram " "too big for channel", c->self); - xfree(data); + free(data); continue; } packet_start(SSH2_MSG_CHANNEL_DATA); packet_put_int(c->remote_id); packet_put_string(data, dlen); packet_send(); - c->remote_window -= dlen + 4; - xfree(data); + c->remote_window -= dlen; + free(data); } continue; } @@ -2290,11 +2400,11 @@ channel_output_poll(void) /* -- protocol input */ /* ARGSUSED */ -void +int channel_input_data(int type, u_int32_t seq, void *ctxt) { int id; - char *data; + const u_char *data; u_int data_len, win_len; Channel *c; @@ -2307,7 +2417,7 @@ channel_input_data(int type, u_int32_t seq, void *ctxt) /* Ignore any data for non-open channels (might happen on close) */ if (c->type != SSH_CHANNEL_OPEN && c->type != SSH_CHANNEL_X11_OPEN) - return; + return 0; /* Get the data. */ data = packet_get_string_ptr(&data_len); @@ -2327,7 +2437,7 @@ channel_input_data(int type, u_int32_t seq, void *ctxt) c->local_window -= win_len; c->local_consumed += win_len; } - return; + return 0; } if (compat20) { @@ -2338,7 +2448,7 @@ channel_input_data(int type, u_int32_t seq, void *ctxt) if (win_len > c->local_window) { logit("channel %d: rcvd too much data %d, win %d", c->self, win_len, c->local_window); - return; + return 0; } c->local_window -= win_len; } @@ -2347,10 +2457,11 @@ channel_input_data(int type, u_int32_t seq, void *ctxt) else buffer_append(&c->output, data, data_len); packet_check_eom(); + return 0; } /* ARGSUSED */ -void +int channel_input_extended_data(int type, u_int32_t seq, void *ctxt) { int id; @@ -2366,7 +2477,7 @@ channel_input_extended_data(int type, u_int32_t seq, void *ctxt) packet_disconnect("Received extended_data for bad channel %d.", id); if (c->type != SSH_CHANNEL_OPEN) { logit("channel %d: ext data for non open", id); - return; + return 0; } if (c->flags & CHAN_EOF_RCVD) { if (datafellows & SSH_BUG_EXTEOF) @@ -2380,24 +2491,25 @@ channel_input_extended_data(int type, u_int32_t seq, void *ctxt) c->extended_usage != CHAN_EXTENDED_WRITE || tcode != SSH2_EXTENDED_DATA_STDERR) { logit("channel %d: bad ext data", c->self); - return; + return 0; } data = packet_get_string(&data_len); packet_check_eom(); if (data_len > c->local_window) { logit("channel %d: rcvd too much extended_data %d, win %d", c->self, data_len, c->local_window); - xfree(data); - return; + free(data); + return 0; } debug2("channel %d: rcvd ext data %d", c->self, data_len); c->local_window -= data_len; buffer_append(&c->extended, data, data_len); - xfree(data); + free(data); + return 0; } /* ARGSUSED */ -void +int channel_input_ieof(int type, u_int32_t seq, void *ctxt) { int id; @@ -2417,11 +2529,11 @@ channel_input_ieof(int type, u_int32_t seq, void *ctxt) if (buffer_len(&c->input) == 0) chan_ibuf_empty(c); } - + return 0; } /* ARGSUSED */ -void +int channel_input_close(int type, u_int32_t seq, void *ctxt) { int id; @@ -2456,11 +2568,12 @@ channel_input_close(int type, u_int32_t seq, void *ctxt) buffer_clear(&c->input); c->type = SSH_CHANNEL_OUTPUT_DRAINING; } + return 0; } /* proto version 1.5 overloads CLOSE_CONFIRMATION with OCLOSE */ /* ARGSUSED */ -void +int channel_input_oclose(int type, u_int32_t seq, void *ctxt) { int id = packet_get_int(); @@ -2470,10 +2583,11 @@ channel_input_oclose(int type, u_int32_t seq, void *ctxt) if (c == NULL) packet_disconnect("Received oclose for nonexistent channel %d.", id); chan_rcvd_oclose(c); + return 0; } /* ARGSUSED */ -void +int channel_input_close_confirmation(int type, u_int32_t seq, void *ctxt) { int id = packet_get_int(); @@ -2483,14 +2597,15 @@ channel_input_close_confirmation(int type, u_int32_t seq, void *ctxt) if (c == NULL) packet_disconnect("Received close confirmation for " "out-of-range channel %d.", id); - if (c->type != SSH_CHANNEL_CLOSED) + if (c->type != SSH_CHANNEL_CLOSED && c->type != SSH_CHANNEL_ABANDONED) packet_disconnect("Received close confirmation for " "non-closed channel %d (type %d).", id, c->type); channel_free(c); + return 0; } /* ARGSUSED */ -void +int channel_input_open_confirmation(int type, u_int32_t seq, void *ctxt) { int id, remote_id; @@ -2519,6 +2634,7 @@ channel_input_open_confirmation(int type, u_int32_t seq, void *ctxt) c->remote_window, c->remote_maxpacket); } packet_check_eom(); + return 0; } static char * @@ -2538,7 +2654,7 @@ reason2txt(int reason) } /* ARGSUSED */ -void +int channel_input_open_failure(int type, u_int32_t seq, void *ctxt) { int id, reason; @@ -2559,10 +2675,8 @@ channel_input_open_failure(int type, u_int32_t seq, void *ctxt) } logit("channel %d: open failed: %s%s%s", id, reason2txt(reason), msg ? ": ": "", msg ? msg : ""); - if (msg != NULL) - xfree(msg); - if (lang != NULL) - xfree(lang); + free(msg); + free(lang); if (c->open_confirm) { debug2("callback start"); c->open_confirm(c->self, 0, c->open_confirm_ctx); @@ -2572,18 +2686,19 @@ channel_input_open_failure(int type, u_int32_t seq, void *ctxt) packet_check_eom(); /* Schedule the channel for cleanup/deletion. */ chan_mark_dead(c); + return 0; } /* ARGSUSED */ -void +int channel_input_window_adjust(int type, u_int32_t seq, void *ctxt) { Channel *c; int id; - u_int adjust; + u_int adjust, tmp; if (!compat20) - return; + return 0; /* Get the channel number and verify it. */ id = packet_get_int(); @@ -2591,16 +2706,20 @@ channel_input_window_adjust(int type, u_int32_t seq, void *ctxt) if (c == NULL) { logit("Received window adjust for non-open channel %d.", id); - return; + return 0; } adjust = packet_get_int(); packet_check_eom(); debug2("channel %d: rcvd adjust %u", id, adjust); - c->remote_window += adjust; + if ((tmp = c->remote_window + adjust) < c->remote_window) + fatal("channel %d: adjust %u overflows remote window %u", + id, adjust, c->remote_window); + c->remote_window = tmp; + return 0; } /* ARGSUSED */ -void +int channel_input_port_open(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; @@ -2618,20 +2737,21 @@ channel_input_port_open(int type, u_int32_t seq, void *ctxt) originator_string = xstrdup("unknown (remote did not supply name)"); } packet_check_eom(); - c = channel_connect_to(host, host_port, + c = channel_connect_to_port(host, host_port, "connected socket", originator_string); - xfree(originator_string); - xfree(host); + free(originator_string); + free(host); if (c == NULL) { packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); packet_put_int(remote_id); packet_send(); } else c->remote_id = remote_id; + return 0; } /* ARGSUSED */ -void +int channel_input_status_confirm(int type, u_int32_t seq, void *ctxt) { Channel *c; @@ -2648,15 +2768,15 @@ channel_input_status_confirm(int type, u_int32_t seq, void *ctxt) if ((c = channel_lookup(id)) == NULL) { logit("channel_input_status_confirm: %d: unknown", id); - return; + return 0; } - ; if ((cc = TAILQ_FIRST(&c->status_confirms)) == NULL) - return; + return 0; cc->cb(type, c, cc->ctx); TAILQ_REMOVE(&c->status_confirms, cc, entry); - bzero(cc, sizeof(*cc)); - xfree(cc); + explicit_bzero(cc, sizeof(*cc)); + free(cc); + return 0; } /* -- tcp forwarding */ @@ -2667,10 +2787,73 @@ channel_set_af(int af) IPv4or6 = af; } + +/* + * Determine whether or not a port forward listens to loopback, the + * specified address or wildcard. On the client, a specified bind + * address will always override gateway_ports. On the server, a + * gateway_ports of 1 (``yes'') will override the client's specification + * and force a wildcard bind, whereas a value of 2 (``clientspecified'') + * will bind to whatever address the client asked for. + * + * Special-case listen_addrs are: + * + * "0.0.0.0" -> wildcard v4/v6 if SSH_OLD_FORWARD_ADDR + * "" (empty string), "*" -> wildcard v4/v6 + * "localhost" -> loopback v4/v6 + * "127.0.0.1" / "::1" -> accepted even if gateway_ports isn't set + */ +static const char * +channel_fwd_bind_addr(const char *listen_addr, int *wildcardp, + int is_client, struct ForwardOptions *fwd_opts) +{ + const char *addr = NULL; + int wildcard = 0; + + if (listen_addr == NULL) { + /* No address specified: default to gateway_ports setting */ + if (fwd_opts->gateway_ports) + wildcard = 1; + } else if (fwd_opts->gateway_ports || is_client) { + if (((datafellows & SSH_OLD_FORWARD_ADDR) && + strcmp(listen_addr, "0.0.0.0") == 0 && is_client == 0) || + *listen_addr == '\0' || strcmp(listen_addr, "*") == 0 || + (!is_client && fwd_opts->gateway_ports == 1)) { + wildcard = 1; + /* + * Notify client if they requested a specific listen + * address and it was overridden. + */ + if (*listen_addr != '\0' && + strcmp(listen_addr, "0.0.0.0") != 0 && + strcmp(listen_addr, "*") != 0) { + packet_send_debug("Forwarding listen address " + "\"%s\" overridden by server " + "GatewayPorts", listen_addr); + } + } else if (strcmp(listen_addr, "localhost") != 0 || + strcmp(listen_addr, "127.0.0.1") == 0 || + strcmp(listen_addr, "::1") == 0) { + /* Accept localhost address when GatewayPorts=yes */ + addr = listen_addr; + } + } else if (strcmp(listen_addr, "127.0.0.1") == 0 || + strcmp(listen_addr, "::1") == 0) { + /* + * If a specific IPv4/IPv6 localhost address has been + * requested then accept it even if gateway_ports is in + * effect. This allows the client to prefer IPv4 or IPv6. + */ + addr = listen_addr; + } + if (wildcardp != NULL) + *wildcardp = wildcard; + return addr; +} + static int -channel_setup_fwd_listener(int type, const char *listen_addr, - u_short listen_port, int *allocated_listen_port, - const char *host_to_connect, u_short port_to_connect, int gateway_ports) +channel_setup_fwd_listener_tcpip(int type, struct Forward *fwd, + int *allocated_listen_port, struct ForwardOptions *fwd_opts) { Channel *c; int sock, r, success = 0, wildcard = 0, is_client; @@ -2679,50 +2862,27 @@ channel_setup_fwd_listener(int type, const char *listen_addr, char ntop[NI_MAXHOST], strport[NI_MAXSERV]; in_port_t *lport_p; - host = (type == SSH_CHANNEL_RPORT_LISTENER) ? - listen_addr : host_to_connect; is_client = (type == SSH_CHANNEL_PORT_LISTENER); - if (host == NULL) { - error("No forward host name."); - return 0; - } - if (strlen(host) >= NI_MAXHOST) { - error("Forward host name too long."); - return 0; + if (is_client && fwd->connect_path != NULL) { + host = fwd->connect_path; + } else { + host = (type == SSH_CHANNEL_RPORT_LISTENER) ? + fwd->listen_host : fwd->connect_host; + if (host == NULL) { + error("No forward host name."); + return 0; + } + if (strlen(host) >= NI_MAXHOST) { + error("Forward host name too long."); + return 0; + } } - /* - * Determine whether or not a port forward listens to loopback, - * specified address or wildcard. On the client, a specified bind - * address will always override gateway_ports. On the server, a - * gateway_ports of 1 (``yes'') will override the client's - * specification and force a wildcard bind, whereas a value of 2 - * (``clientspecified'') will bind to whatever address the client - * asked for. - * - * Special-case listen_addrs are: - * - * "0.0.0.0" -> wildcard v4/v6 if SSH_OLD_FORWARD_ADDR - * "" (empty string), "*" -> wildcard v4/v6 - * "localhost" -> loopback v4/v6 - */ - addr = NULL; - if (listen_addr == NULL) { - /* No address specified: default to gateway_ports setting */ - if (gateway_ports) - wildcard = 1; - } else if (gateway_ports || is_client) { - if (((datafellows & SSH_OLD_FORWARD_ADDR) && - strcmp(listen_addr, "0.0.0.0") == 0 && is_client == 0) || - *listen_addr == '\0' || strcmp(listen_addr, "*") == 0 || - (!is_client && gateway_ports == 1)) - wildcard = 1; - else if (strcmp(listen_addr, "localhost") != 0) - addr = listen_addr; - } - - debug3("channel_setup_fwd_listener: type %d wildcard %d addr %s", + /* Determine the bind address, cf. channel_fwd_bind_addr() comment */ + addr = channel_fwd_bind_addr(fwd->listen_host, &wildcard, + is_client, fwd_opts); + debug3("%s: type %d wildcard %d addr %s", __func__, type, wildcard, (addr == NULL) ? "NULL" : addr); /* @@ -2733,15 +2893,14 @@ channel_setup_fwd_listener(int type, const char *listen_addr, hints.ai_family = IPv4or6; hints.ai_flags = wildcard ? AI_PASSIVE : 0; hints.ai_socktype = SOCK_STREAM; - snprintf(strport, sizeof strport, "%d", listen_port); + snprintf(strport, sizeof strport, "%d", fwd->listen_port); if ((r = getaddrinfo(addr, strport, &hints, &aitop)) != 0) { if (addr == NULL) { /* This really shouldn't happen */ packet_disconnect("getaddrinfo: fatal error: %s", ssh_gai_strerror(r)); } else { - error("channel_setup_fwd_listener: " - "getaddrinfo(%.64s): %s", addr, + error("%s: getaddrinfo(%.64s): %s", __func__, addr, ssh_gai_strerror(r)); } return 0; @@ -2765,13 +2924,13 @@ channel_setup_fwd_listener(int type, const char *listen_addr, * If allocating a port for -R forwards, then use the * same port for all address families. */ - if (type == SSH_CHANNEL_RPORT_LISTENER && listen_port == 0 && + if (type == SSH_CHANNEL_RPORT_LISTENER && fwd->listen_port == 0 && allocated_listen_port != NULL && *allocated_listen_port > 0) *lport_p = htons(*allocated_listen_port); if (getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop, sizeof(ntop), strport, sizeof(strport), NI_NUMERICHOST|NI_NUMERICSERV) != 0) { - error("channel_setup_fwd_listener: getnameinfo failed"); + error("%s: getnameinfo failed", __func__); continue; } /* Create a port to listen for the host. */ @@ -2808,10 +2967,10 @@ channel_setup_fwd_listener(int type, const char *listen_addr, } /* - * listen_port == 0 requests a dynamically allocated port - + * fwd->listen_port == 0 requests a dynamically allocated port - * record what we got. */ - if (type == SSH_CHANNEL_RPORT_LISTENER && listen_port == 0 && + if (type == SSH_CHANNEL_RPORT_LISTENER && fwd->listen_port == 0 && allocated_listen_port != NULL && *allocated_listen_port == 0) { *allocated_listen_port = get_sock_port(sock, 1); @@ -2824,28 +2983,107 @@ channel_setup_fwd_listener(int type, const char *listen_addr, CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "port listener", 1); c->path = xstrdup(host); - c->host_port = port_to_connect; - c->listening_port = listen_port; + c->host_port = fwd->connect_port; + c->listening_addr = addr == NULL ? NULL : xstrdup(addr); + if (fwd->listen_port == 0 && allocated_listen_port != NULL && + !(datafellows & SSH_BUG_DYNAMIC_RPORT)) + c->listening_port = *allocated_listen_port; + else + c->listening_port = fwd->listen_port; success = 1; } if (success == 0) - error("channel_setup_fwd_listener: cannot listen to port: %d", - listen_port); + error("%s: cannot listen to port: %d", __func__, + fwd->listen_port); freeaddrinfo(aitop); return success; } -int -channel_cancel_rport_listener(const char *host, u_short port) +static int +channel_setup_fwd_listener_streamlocal(int type, struct Forward *fwd, + struct ForwardOptions *fwd_opts) +{ + struct sockaddr_un sunaddr; + const char *path; + Channel *c; + int port, sock; + mode_t omask; + + switch (type) { + case SSH_CHANNEL_UNIX_LISTENER: + if (fwd->connect_path != NULL) { + if (strlen(fwd->connect_path) > sizeof(sunaddr.sun_path)) { + error("Local connecting path too long: %s", + fwd->connect_path); + return 0; + } + path = fwd->connect_path; + port = PORT_STREAMLOCAL; + } else { + if (fwd->connect_host == NULL) { + error("No forward host name."); + return 0; + } + if (strlen(fwd->connect_host) >= NI_MAXHOST) { + error("Forward host name too long."); + return 0; + } + path = fwd->connect_host; + port = fwd->connect_port; + } + break; + case SSH_CHANNEL_RUNIX_LISTENER: + path = fwd->listen_path; + port = PORT_STREAMLOCAL; + break; + default: + error("%s: unexpected channel type %d", __func__, type); + return 0; + } + + if (fwd->listen_path == NULL) { + error("No forward path name."); + return 0; + } + if (strlen(fwd->listen_path) > sizeof(sunaddr.sun_path)) { + error("Local listening path too long: %s", fwd->listen_path); + return 0; + } + + debug3("%s: type %d path %s", __func__, type, fwd->listen_path); + + /* Start a Unix domain listener. */ + omask = umask(fwd_opts->streamlocal_bind_mask); + sock = unix_listener(fwd->listen_path, SSH_LISTEN_BACKLOG, + fwd_opts->streamlocal_bind_unlink); + umask(omask); + if (sock < 0) + return 0; + + debug("Local forwarding listening on path %s.", fwd->listen_path); + + /* Allocate a channel number for the socket. */ + c = channel_new("unix listener", type, sock, sock, -1, + CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, + 0, "unix listener", 1); + c->path = xstrdup(path); + c->host_port = port; + c->listening_port = PORT_STREAMLOCAL; + c->listening_addr = xstrdup(fwd->listen_path); + return 1; +} + +static int +channel_cancel_rport_listener_tcpip(const char *host, u_short port) { u_int i; int found = 0; for (i = 0; i < channels_alloc; i++) { Channel *c = channels[i]; - - if (c != NULL && c->type == SSH_CHANNEL_RPORT_LISTENER && - strcmp(c->path, host) == 0 && c->listening_port == port) { + if (c == NULL || c->type != SSH_CHANNEL_RPORT_LISTENER) + continue; + if (strcmp(c->path, host) == 0 && c->listening_port == port) { debug2("%s: close channel %d", __func__, i); channel_free(c); found = 1; @@ -2855,68 +3093,190 @@ channel_cancel_rport_listener(const char *host, u_short port) return (found); } +static int +channel_cancel_rport_listener_streamlocal(const char *path) +{ + u_int i; + int found = 0; + + for (i = 0; i < channels_alloc; i++) { + Channel *c = channels[i]; + if (c == NULL || c->type != SSH_CHANNEL_RUNIX_LISTENER) + continue; + if (c->path == NULL) + continue; + if (strcmp(c->path, path) == 0) { + debug2("%s: close channel %d", __func__, i); + channel_free(c); + found = 1; + } + } + + return (found); +} + +int +channel_cancel_rport_listener(struct Forward *fwd) +{ + if (fwd->listen_path != NULL) + return channel_cancel_rport_listener_streamlocal(fwd->listen_path); + else + return channel_cancel_rport_listener_tcpip(fwd->listen_host, fwd->listen_port); +} + +static int +channel_cancel_lport_listener_tcpip(const char *lhost, u_short lport, + int cport, struct ForwardOptions *fwd_opts) +{ + u_int i; + int found = 0; + const char *addr = channel_fwd_bind_addr(lhost, NULL, 1, fwd_opts); + + for (i = 0; i < channels_alloc; i++) { + Channel *c = channels[i]; + if (c == NULL || c->type != SSH_CHANNEL_PORT_LISTENER) + continue; + if (c->listening_port != lport) + continue; + if (cport == CHANNEL_CANCEL_PORT_STATIC) { + /* skip dynamic forwardings */ + if (c->host_port == 0) + continue; + } else { + if (c->host_port != cport) + continue; + } + if ((c->listening_addr == NULL && addr != NULL) || + (c->listening_addr != NULL && addr == NULL)) + continue; + if (addr == NULL || strcmp(c->listening_addr, addr) == 0) { + debug2("%s: close channel %d", __func__, i); + channel_free(c); + found = 1; + } + } + + return (found); +} + +static int +channel_cancel_lport_listener_streamlocal(const char *path) +{ + u_int i; + int found = 0; + + if (path == NULL) { + error("%s: no path specified.", __func__); + return 0; + } + + for (i = 0; i < channels_alloc; i++) { + Channel *c = channels[i]; + if (c == NULL || c->type != SSH_CHANNEL_UNIX_LISTENER) + continue; + if (c->listening_addr == NULL) + continue; + if (strcmp(c->listening_addr, path) == 0) { + debug2("%s: close channel %d", __func__, i); + channel_free(c); + found = 1; + } + } + + return (found); +} + +int +channel_cancel_lport_listener(struct Forward *fwd, int cport, struct ForwardOptions *fwd_opts) +{ + if (fwd->listen_path != NULL) + return channel_cancel_lport_listener_streamlocal(fwd->listen_path); + else + return channel_cancel_lport_listener_tcpip(fwd->listen_host, fwd->listen_port, cport, fwd_opts); +} + /* protocol local port fwd, used by ssh (and sshd in v1) */ int -channel_setup_local_fwd_listener(const char *listen_host, u_short listen_port, - const char *host_to_connect, u_short port_to_connect, int gateway_ports) +channel_setup_local_fwd_listener(struct Forward *fwd, struct ForwardOptions *fwd_opts) { - return channel_setup_fwd_listener(SSH_CHANNEL_PORT_LISTENER, - listen_host, listen_port, NULL, host_to_connect, port_to_connect, - gateway_ports); + if (fwd->listen_path != NULL) { + return channel_setup_fwd_listener_streamlocal( + SSH_CHANNEL_UNIX_LISTENER, fwd, fwd_opts); + } else { + return channel_setup_fwd_listener_tcpip(SSH_CHANNEL_PORT_LISTENER, + fwd, NULL, fwd_opts); + } } /* protocol v2 remote port fwd, used by sshd */ int -channel_setup_remote_fwd_listener(const char *listen_address, - u_short listen_port, int *allocated_listen_port, int gateway_ports) +channel_setup_remote_fwd_listener(struct Forward *fwd, + int *allocated_listen_port, struct ForwardOptions *fwd_opts) { - return channel_setup_fwd_listener(SSH_CHANNEL_RPORT_LISTENER, - listen_address, listen_port, allocated_listen_port, - NULL, 0, gateway_ports); + if (fwd->listen_path != NULL) { + return channel_setup_fwd_listener_streamlocal( + SSH_CHANNEL_RUNIX_LISTENER, fwd, fwd_opts); + } else { + return channel_setup_fwd_listener_tcpip( + SSH_CHANNEL_RPORT_LISTENER, fwd, allocated_listen_port, + fwd_opts); + } +} + +/* + * Translate the requested rfwd listen host to something usable for + * this server. + */ +static const char * +channel_rfwd_bind_host(const char *listen_host) +{ + if (listen_host == NULL) { + if (datafellows & SSH_BUG_RFWD_ADDR) + return "127.0.0.1"; + else + return "localhost"; + } else if (*listen_host == '\0' || strcmp(listen_host, "*") == 0) { + if (datafellows & SSH_BUG_RFWD_ADDR) + return "0.0.0.0"; + else + return ""; + } else + return listen_host; } /* * Initiate forwarding of connections to port "port" on remote host through * the secure channel to host:port from local side. + * Returns handle (index) for updating the dynamic listen port with + * channel_update_permitted_opens(). */ - int -channel_request_remote_forwarding(const char *listen_host, u_short listen_port, - const char *host_to_connect, u_short port_to_connect) +channel_request_remote_forwarding(struct Forward *fwd) { - int type, success = 0; + int type, success = 0, idx = -1; /* Send the forward request to the remote side. */ if (compat20) { - const char *address_to_bind; - if (listen_host == NULL) { - if (datafellows & SSH_BUG_RFWD_ADDR) - address_to_bind = "127.0.0.1"; - else - address_to_bind = "localhost"; - } else if (*listen_host == '\0' || - strcmp(listen_host, "*") == 0) { - if (datafellows & SSH_BUG_RFWD_ADDR) - address_to_bind = "0.0.0.0"; - else - address_to_bind = ""; - } else - address_to_bind = listen_host; - packet_start(SSH2_MSG_GLOBAL_REQUEST); - packet_put_cstring("tcpip-forward"); - packet_put_char(1); /* boolean: want reply */ - packet_put_cstring(address_to_bind); - packet_put_int(listen_port); + if (fwd->listen_path != NULL) { + packet_put_cstring("streamlocal-forward@openssh.com"); + packet_put_char(1); /* boolean: want reply */ + packet_put_cstring(fwd->listen_path); + } else { + packet_put_cstring("tcpip-forward"); + packet_put_char(1); /* boolean: want reply */ + packet_put_cstring(channel_rfwd_bind_host(fwd->listen_host)); + packet_put_int(fwd->listen_port); + } packet_send(); packet_write_wait(); /* Assume that server accepts the request */ success = 1; - } else { + } else if (fwd->listen_path == NULL) { packet_start(SSH_CMSG_PORT_FORWARD_REQUEST); - packet_put_int(listen_port); - packet_put_cstring(host_to_connect); - packet_put_int(port_to_connect); + packet_put_int(fwd->listen_port); + packet_put_cstring(fwd->connect_host); + packet_put_int(fwd->connect_port); packet_send(); packet_write_wait(); @@ -2933,51 +3293,184 @@ channel_request_remote_forwarding(const char *listen_host, u_short listen_port, packet_disconnect("Protocol error for port forward request:" "received packet type %d.", type); } + } else { + logit("Warning: Server does not support remote stream local forwarding."); } if (success) { /* Record that connection to this host/port is permitted. */ - permitted_opens = xrealloc(permitted_opens, + permitted_opens = xreallocarray(permitted_opens, num_permitted_opens + 1, sizeof(*permitted_opens)); - permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host_to_connect); - permitted_opens[num_permitted_opens].port_to_connect = port_to_connect; - permitted_opens[num_permitted_opens].listen_port = listen_port; - num_permitted_opens++; + idx = num_permitted_opens++; + if (fwd->connect_path != NULL) { + permitted_opens[idx].host_to_connect = + xstrdup(fwd->connect_path); + permitted_opens[idx].port_to_connect = + PORT_STREAMLOCAL; + } else { + permitted_opens[idx].host_to_connect = + xstrdup(fwd->connect_host); + permitted_opens[idx].port_to_connect = + fwd->connect_port; + } + if (fwd->listen_path != NULL) { + permitted_opens[idx].listen_host = NULL; + permitted_opens[idx].listen_path = + xstrdup(fwd->listen_path); + permitted_opens[idx].listen_port = PORT_STREAMLOCAL; + } else { + permitted_opens[idx].listen_host = + fwd->listen_host ? xstrdup(fwd->listen_host) : NULL; + permitted_opens[idx].listen_path = NULL; + permitted_opens[idx].listen_port = fwd->listen_port; + } } - return (success ? 0 : -1); + return (idx); +} + +static int +open_match(ForwardPermission *allowed_open, const char *requestedhost, + int requestedport) +{ + if (allowed_open->host_to_connect == NULL) + return 0; + if (allowed_open->port_to_connect != FWD_PERMIT_ANY_PORT && + allowed_open->port_to_connect != requestedport) + return 0; + if (strcmp(allowed_open->host_to_connect, requestedhost) != 0) + return 0; + return 1; +} + +/* + * Note that in the listen host/port case + * we don't support FWD_PERMIT_ANY_PORT and + * need to translate between the configured-host (listen_host) + * and what we've sent to the remote server (channel_rfwd_bind_host) + */ +static int +open_listen_match_tcpip(ForwardPermission *allowed_open, + const char *requestedhost, u_short requestedport, int translate) +{ + const char *allowed_host; + + if (allowed_open->host_to_connect == NULL) + return 0; + if (allowed_open->listen_port != requestedport) + return 0; + if (!translate && allowed_open->listen_host == NULL && + requestedhost == NULL) + return 1; + allowed_host = translate ? + channel_rfwd_bind_host(allowed_open->listen_host) : + allowed_open->listen_host; + if (allowed_host == NULL || + strcmp(allowed_host, requestedhost) != 0) + return 0; + return 1; +} + +static int +open_listen_match_streamlocal(ForwardPermission *allowed_open, + const char *requestedpath) +{ + if (allowed_open->host_to_connect == NULL) + return 0; + if (allowed_open->listen_port != PORT_STREAMLOCAL) + return 0; + if (allowed_open->listen_path == NULL || + strcmp(allowed_open->listen_path, requestedpath) != 0) + return 0; + return 1; } /* * Request cancellation of remote forwarding of connection host:port from * local side. */ -void -channel_request_rforward_cancel(const char *host, u_short port) +static int +channel_request_rforward_cancel_tcpip(const char *host, u_short port) { int i; if (!compat20) - return; + return -1; for (i = 0; i < num_permitted_opens; i++) { - if (permitted_opens[i].host_to_connect != NULL && - permitted_opens[i].listen_port == port) + if (open_listen_match_tcpip(&permitted_opens[i], host, port, 0)) break; } if (i >= num_permitted_opens) { debug("%s: requested forward not found", __func__); - return; + return -1; } packet_start(SSH2_MSG_GLOBAL_REQUEST); packet_put_cstring("cancel-tcpip-forward"); packet_put_char(0); - packet_put_cstring(host == NULL ? "" : host); + packet_put_cstring(channel_rfwd_bind_host(host)); packet_put_int(port); packet_send(); permitted_opens[i].listen_port = 0; permitted_opens[i].port_to_connect = 0; - xfree(permitted_opens[i].host_to_connect); + free(permitted_opens[i].host_to_connect); permitted_opens[i].host_to_connect = NULL; + free(permitted_opens[i].listen_host); + permitted_opens[i].listen_host = NULL; + permitted_opens[i].listen_path = NULL; + + return 0; +} + +/* + * Request cancellation of remote forwarding of Unix domain socket + * path from local side. + */ +static int +channel_request_rforward_cancel_streamlocal(const char *path) +{ + int i; + + if (!compat20) + return -1; + + for (i = 0; i < num_permitted_opens; i++) { + if (open_listen_match_streamlocal(&permitted_opens[i], path)) + break; + } + if (i >= num_permitted_opens) { + debug("%s: requested forward not found", __func__); + return -1; + } + packet_start(SSH2_MSG_GLOBAL_REQUEST); + packet_put_cstring("cancel-streamlocal-forward@openssh.com"); + packet_put_char(0); + packet_put_cstring(path); + packet_send(); + + permitted_opens[i].listen_port = 0; + permitted_opens[i].port_to_connect = 0; + free(permitted_opens[i].host_to_connect); + permitted_opens[i].host_to_connect = NULL; + permitted_opens[i].listen_host = NULL; + free(permitted_opens[i].listen_path); + permitted_opens[i].listen_path = NULL; + + return 0; +} + +/* + * Request cancellation of remote forwarding of a connection from local side. + */ +int +channel_request_rforward_cancel(struct Forward *fwd) +{ + if (fwd->listen_path != NULL) { + return (channel_request_rforward_cancel_streamlocal( + fwd->listen_path)); + } else { + return (channel_request_rforward_cancel_tcpip(fwd->listen_host, + fwd->listen_port ? fwd->listen_port : fwd->allocated_port)); + } } /* @@ -2986,36 +3479,35 @@ channel_request_rforward_cancel(const char *host, u_short port) * message if there was an error). */ int -channel_input_port_forward_request(int is_root, int gateway_ports) +channel_input_port_forward_request(int is_root, struct ForwardOptions *fwd_opts) { - u_short port, host_port; int success = 0; - char *hostname; + struct Forward fwd; /* Get arguments from the packet. */ - port = packet_get_int(); - hostname = packet_get_string(NULL); - host_port = packet_get_int(); + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_port = packet_get_int(); + fwd.connect_host = packet_get_string(NULL); + fwd.connect_port = packet_get_int(); #ifndef HAVE_CYGWIN /* * Check that an unprivileged user is not trying to forward a * privileged port. */ - if (port < IPPORT_RESERVED && !is_root) + if (fwd.listen_port < IPPORT_RESERVED && !is_root) packet_disconnect( "Requested forwarding of port %d but user is not root.", - port); - if (host_port == 0) + fwd.listen_port); + if (fwd.connect_port == 0) packet_disconnect("Dynamic forwarding denied."); #endif /* Initiate forwarding */ - success = channel_setup_local_fwd_listener(NULL, port, hostname, - host_port, gateway_ports); + success = channel_setup_local_fwd_listener(&fwd, fwd_opts); /* Free the argument string. */ - xfree(hostname); + free(fwd.connect_host); return (success ? 0 : -1); } @@ -3037,40 +3529,88 @@ channel_add_permitted_opens(char *host, int port) { debug("allow port forwarding to host %s port %d", host, port); - permitted_opens = xrealloc(permitted_opens, + permitted_opens = xreallocarray(permitted_opens, num_permitted_opens + 1, sizeof(*permitted_opens)); permitted_opens[num_permitted_opens].host_to_connect = xstrdup(host); permitted_opens[num_permitted_opens].port_to_connect = port; + permitted_opens[num_permitted_opens].listen_host = NULL; + permitted_opens[num_permitted_opens].listen_path = NULL; + permitted_opens[num_permitted_opens].listen_port = 0; num_permitted_opens++; all_opens_permitted = 0; } +/* + * Update the listen port for a dynamic remote forward, after + * the actual 'newport' has been allocated. If 'newport' < 0 is + * passed then they entry will be invalidated. + */ +void +channel_update_permitted_opens(int idx, int newport) +{ + if (idx < 0 || idx >= num_permitted_opens) { + debug("channel_update_permitted_opens: index out of range:" + " %d num_permitted_opens %d", idx, num_permitted_opens); + return; + } + debug("%s allowed port %d for forwarding to host %s port %d", + newport > 0 ? "Updating" : "Removing", + newport, + permitted_opens[idx].host_to_connect, + permitted_opens[idx].port_to_connect); + if (newport >= 0) { + permitted_opens[idx].listen_port = + (datafellows & SSH_BUG_DYNAMIC_RPORT) ? 0 : newport; + } else { + permitted_opens[idx].listen_port = 0; + permitted_opens[idx].port_to_connect = 0; + free(permitted_opens[idx].host_to_connect); + permitted_opens[idx].host_to_connect = NULL; + free(permitted_opens[idx].listen_host); + permitted_opens[idx].listen_host = NULL; + free(permitted_opens[idx].listen_path); + permitted_opens[idx].listen_path = NULL; + } +} + int channel_add_adm_permitted_opens(char *host, int port) { debug("config allows port forwarding to host %s port %d", host, port); - permitted_adm_opens = xrealloc(permitted_adm_opens, + permitted_adm_opens = xreallocarray(permitted_adm_opens, num_adm_permitted_opens + 1, sizeof(*permitted_adm_opens)); permitted_adm_opens[num_adm_permitted_opens].host_to_connect = xstrdup(host); permitted_adm_opens[num_adm_permitted_opens].port_to_connect = port; + permitted_adm_opens[num_adm_permitted_opens].listen_host = NULL; + permitted_adm_opens[num_adm_permitted_opens].listen_path = NULL; + permitted_adm_opens[num_adm_permitted_opens].listen_port = 0; return ++num_adm_permitted_opens; } +void +channel_disable_adm_local_opens(void) +{ + channel_clear_adm_permitted_opens(); + permitted_adm_opens = xcalloc(sizeof(*permitted_adm_opens), 1); + permitted_adm_opens[num_adm_permitted_opens].host_to_connect = NULL; + num_adm_permitted_opens = 1; +} + void channel_clear_permitted_opens(void) { int i; - for (i = 0; i < num_permitted_opens; i++) - if (permitted_opens[i].host_to_connect != NULL) - xfree(permitted_opens[i].host_to_connect); - if (num_permitted_opens > 0) { - xfree(permitted_opens); - permitted_opens = NULL; + for (i = 0; i < num_permitted_opens; i++) { + free(permitted_opens[i].host_to_connect); + free(permitted_opens[i].listen_host); + free(permitted_opens[i].listen_path); } + free(permitted_opens); + permitted_opens = NULL; num_permitted_opens = 0; } @@ -3079,13 +3619,13 @@ channel_clear_adm_permitted_opens(void) { int i; - for (i = 0; i < num_adm_permitted_opens; i++) - if (permitted_adm_opens[i].host_to_connect != NULL) - xfree(permitted_adm_opens[i].host_to_connect); - if (num_adm_permitted_opens > 0) { - xfree(permitted_adm_opens); - permitted_adm_opens = NULL; + for (i = 0; i < num_adm_permitted_opens; i++) { + free(permitted_adm_opens[i].host_to_connect); + free(permitted_adm_opens[i].listen_host); + free(permitted_adm_opens[i].listen_path); } + free(permitted_adm_opens); + permitted_adm_opens = NULL; num_adm_permitted_opens = 0; } @@ -3100,27 +3640,53 @@ channel_print_adm_permitted_opens(void) return; } for (i = 0; i < num_adm_permitted_opens; i++) - if (permitted_adm_opens[i].host_to_connect != NULL) + if (permitted_adm_opens[i].host_to_connect == NULL) + printf(" none"); + else printf(" %s:%d", permitted_adm_opens[i].host_to_connect, permitted_adm_opens[i].port_to_connect); printf("\n"); } +/* returns port number, FWD_PERMIT_ANY_PORT or -1 on error */ +int +permitopen_port(const char *p) +{ + int port; + + if (strcmp(p, "*") == 0) + return FWD_PERMIT_ANY_PORT; + if ((port = a2port(p)) > 0) + return port; + return -1; +} + /* Try to start non-blocking connect to next host in cctx list */ static int connect_next(struct channel_connect *cctx) { int sock, saved_errno; - char ntop[NI_MAXHOST], strport[NI_MAXSERV]; + struct sockaddr_un *sunaddr; + char ntop[NI_MAXHOST], strport[MAX(NI_MAXSERV,sizeof(sunaddr->sun_path))]; for (; cctx->ai; cctx->ai = cctx->ai->ai_next) { - if (cctx->ai->ai_family != AF_INET && - cctx->ai->ai_family != AF_INET6) - continue; - if (getnameinfo(cctx->ai->ai_addr, cctx->ai->ai_addrlen, - ntop, sizeof(ntop), strport, sizeof(strport), - NI_NUMERICHOST|NI_NUMERICSERV) != 0) { - error("connect_next: getnameinfo failed"); + switch (cctx->ai->ai_family) { + case AF_UNIX: + /* unix:pathname instead of host:port */ + sunaddr = (struct sockaddr_un *)cctx->ai->ai_addr; + strlcpy(ntop, "unix", sizeof(ntop)); + strlcpy(strport, sunaddr->sun_path, sizeof(strport)); + break; + case AF_INET: + case AF_INET6: + if (getnameinfo(cctx->ai->ai_addr, cctx->ai->ai_addrlen, + ntop, sizeof(ntop), strport, sizeof(strport), + NI_NUMERICHOST|NI_NUMERICSERV) != 0) { + error("connect_next: getnameinfo failed"); + continue; + } + break; + default: continue; } if ((sock = socket(cctx->ai->ai_family, cctx->ai->ai_socktype, @@ -3143,10 +3709,11 @@ connect_next(struct channel_connect *cctx) errno = saved_errno; continue; /* fail -- try next */ } + if (cctx->ai->ai_family != AF_UNIX) + set_nodelay(sock); debug("connect_next: host %.100s ([%.100s]:%s) " "in progress, fd=%d", cctx->host, ntop, strport, sock); cctx->ai = cctx->ai->ai_next; - set_nodelay(sock); return sock; } return -1; @@ -3155,17 +3722,19 @@ connect_next(struct channel_connect *cctx) static void channel_connect_ctx_free(struct channel_connect *cctx) { - xfree(cctx->host); - if (cctx->aitop) - freeaddrinfo(cctx->aitop); - bzero(cctx, sizeof(*cctx)); - cctx->host = NULL; - cctx->ai = cctx->aitop = NULL; + free(cctx->host); + if (cctx->aitop) { + if (cctx->aitop->ai_family == AF_UNIX) + free(cctx->aitop); + else + freeaddrinfo(cctx->aitop); + } + memset(cctx, 0, sizeof(*cctx)); } -/* Return CONNECTING channel to remote host, port */ +/* Return CONNECTING channel to remote host:port or local socket path */ static Channel * -connect_to(const char *host, u_short port, char *ctype, char *rname) +connect_to(const char *name, int port, char *ctype, char *rname) { struct addrinfo hints; int gaierr; @@ -3175,23 +3744,51 @@ connect_to(const char *host, u_short port, char *ctype, char *rname) Channel *c; memset(&cctx, 0, sizeof(cctx)); - memset(&hints, 0, sizeof(hints)); - hints.ai_family = IPv4or6; - hints.ai_socktype = SOCK_STREAM; - snprintf(strport, sizeof strport, "%d", port); - if ((gaierr = getaddrinfo(host, strport, &hints, &cctx.aitop)) != 0) { - error("connect_to %.100s: unknown host (%s)", host, - ssh_gai_strerror(gaierr)); - return NULL; + + if (port == PORT_STREAMLOCAL) { + struct sockaddr_un *sunaddr; + struct addrinfo *ai; + + if (strlen(name) > sizeof(sunaddr->sun_path)) { + error("%.100s: %.100s", name, strerror(ENAMETOOLONG)); + return (NULL); + } + + /* + * Fake up a struct addrinfo for AF_UNIX connections. + * channel_connect_ctx_free() must check ai_family + * and use free() not freeaddirinfo() for AF_UNIX. + */ + ai = xmalloc(sizeof(*ai) + sizeof(*sunaddr)); + memset(ai, 0, sizeof(*ai) + sizeof(*sunaddr)); + ai->ai_addr = (struct sockaddr *)(ai + 1); + ai->ai_addrlen = sizeof(*sunaddr); + ai->ai_family = AF_UNIX; + ai->ai_socktype = SOCK_STREAM; + ai->ai_protocol = PF_UNSPEC; + sunaddr = (struct sockaddr_un *)ai->ai_addr; + sunaddr->sun_family = AF_UNIX; + strlcpy(sunaddr->sun_path, name, sizeof(sunaddr->sun_path)); + cctx.aitop = ai; + } else { + memset(&hints, 0, sizeof(hints)); + hints.ai_family = IPv4or6; + hints.ai_socktype = SOCK_STREAM; + snprintf(strport, sizeof strport, "%d", port); + if ((gaierr = getaddrinfo(name, strport, &hints, &cctx.aitop)) != 0) { + error("connect_to %.100s: unknown host (%s)", name, + ssh_gai_strerror(gaierr)); + return NULL; + } } - cctx.host = xstrdup(host); + cctx.host = xstrdup(name); cctx.port = port; cctx.ai = cctx.aitop; if ((sock = connect_next(&cctx)) == -1) { error("connect to %.100s port %d failed: %s", - host, port, strerror(errno)); + name, port, strerror(errno)); channel_connect_ctx_free(&cctx); return NULL; } @@ -3202,13 +3799,14 @@ connect_to(const char *host, u_short port, char *ctype, char *rname) } Channel * -channel_connect_by_listen_address(u_short listen_port, char *ctype, char *rname) +channel_connect_by_listen_address(const char *listen_host, + u_short listen_port, char *ctype, char *rname) { int i; for (i = 0; i < num_permitted_opens; i++) { - if (permitted_opens[i].host_to_connect != NULL && - permitted_opens[i].listen_port == listen_port) { + if (open_listen_match_tcpip(&permitted_opens[i], listen_host, + listen_port, 1)) { return connect_to( permitted_opens[i].host_to_connect, permitted_opens[i].port_to_connect, ctype, rname); @@ -3219,29 +3817,45 @@ channel_connect_by_listen_address(u_short listen_port, char *ctype, char *rname) return NULL; } +Channel * +channel_connect_by_listen_path(const char *path, char *ctype, char *rname) +{ + int i; + + for (i = 0; i < num_permitted_opens; i++) { + if (open_listen_match_streamlocal(&permitted_opens[i], path)) { + return connect_to( + permitted_opens[i].host_to_connect, + permitted_opens[i].port_to_connect, ctype, rname); + } + } + error("WARNING: Server requests forwarding for unknown path %.100s", + path); + return NULL; +} + /* Check if connecting to that port is permitted and connect. */ Channel * -channel_connect_to(const char *host, u_short port, char *ctype, char *rname) +channel_connect_to_port(const char *host, u_short port, char *ctype, char *rname) { int i, permit, permit_adm = 1; permit = all_opens_permitted; if (!permit) { for (i = 0; i < num_permitted_opens; i++) - if (permitted_opens[i].host_to_connect != NULL && - permitted_opens[i].port_to_connect == port && - strcmp(permitted_opens[i].host_to_connect, host) == 0) + if (open_match(&permitted_opens[i], host, port)) { permit = 1; + break; + } } if (num_adm_permitted_opens > 0) { permit_adm = 0; for (i = 0; i < num_adm_permitted_opens; i++) - if (permitted_adm_opens[i].host_to_connect != NULL && - permitted_adm_opens[i].port_to_connect == port && - strcmp(permitted_adm_opens[i].host_to_connect, host) - == 0) + if (open_match(&permitted_adm_opens[i], host, port)) { permit_adm = 1; + break; + } } if (!permit || !permit_adm) { @@ -3252,6 +3866,38 @@ channel_connect_to(const char *host, u_short port, char *ctype, char *rname) return connect_to(host, port, ctype, rname); } +/* Check if connecting to that path is permitted and connect. */ +Channel * +channel_connect_to_path(const char *path, char *ctype, char *rname) +{ + int i, permit, permit_adm = 1; + + permit = all_opens_permitted; + if (!permit) { + for (i = 0; i < num_permitted_opens; i++) + if (open_match(&permitted_opens[i], path, PORT_STREAMLOCAL)) { + permit = 1; + break; + } + } + + if (num_adm_permitted_opens > 0) { + permit_adm = 0; + for (i = 0; i < num_adm_permitted_opens; i++) + if (open_match(&permitted_adm_opens[i], path, PORT_STREAMLOCAL)) { + permit_adm = 1; + break; + } + } + + if (!permit || !permit_adm) { + logit("Received request to connect to path %.100s, " + "but the request was denied.", path); + return NULL; + } + return connect_to(path, PORT_STREAMLOCAL, ctype, rname); +} + void channel_send_window_changes(void) { @@ -3524,7 +4170,7 @@ x11_connect_display(void) */ /* ARGSUSED */ -void +int x11_input_open(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; @@ -3552,7 +4198,7 @@ x11_input_open(int type, u_int32_t seq, void *ctxt) c->remote_id = remote_id; c->force_drain = 1; } - xfree(remote_host); + free(remote_host); if (c == NULL) { /* Send refusal to the remote host. */ packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); @@ -3564,11 +4210,12 @@ x11_input_open(int type, u_int32_t seq, void *ctxt) packet_put_int(c->self); } packet_send(); + return 0; } /* dummy protocol handler that denies SSH-1 requests (agent/x11) */ /* ARGSUSED */ -void +int deny_input_open(int type, u_int32_t seq, void *ctxt) { int rchan = packet_get_int(); @@ -3588,6 +4235,7 @@ deny_input_open(int type, u_int32_t seq, void *ctxt) packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); packet_put_int(rchan); packet_send(); + return 0; } /* @@ -3660,7 +4308,7 @@ x11_request_forwarding_with_spoofing(int client_session_id, const char *disp, packet_put_int(screen_number); packet_send(); packet_write_wait(); - xfree(new_data); + free(new_data); } diff --git a/channels.h b/channels.h index e2941c8..9d76c9d 100644 --- a/channels.h +++ b/channels.h @@ -1,4 +1,4 @@ -/* $OpenBSD: channels.h,v 1.105 2011/06/22 22:08:42 djm Exp $ */ +/* $OpenBSD: channels.h,v 1.118 2015/07/01 02:26:31 djm Exp $ */ /* * Author: Tatu Ylonen @@ -55,7 +55,12 @@ #define SSH_CHANNEL_ZOMBIE 14 /* Almost dead. */ #define SSH_CHANNEL_MUX_LISTENER 15 /* Listener for mux conn. */ #define SSH_CHANNEL_MUX_CLIENT 16 /* Conn. to mux slave */ -#define SSH_CHANNEL_MAX_TYPE 17 +#define SSH_CHANNEL_ABANDONED 17 /* Abandoned session, eg mux */ +#define SSH_CHANNEL_UNIX_LISTENER 18 /* Listening on a domain socket. */ +#define SSH_CHANNEL_RUNIX_LISTENER 19 /* Listening to a R-style domain socket. */ +#define SSH_CHANNEL_MAX_TYPE 20 + +#define CHANNEL_CANCEL_PORT_STATIC -1 struct Channel; typedef struct Channel Channel; @@ -100,14 +105,17 @@ struct Channel { int sock; /* sock fd */ int ctl_chan; /* control channel (multiplexed connections) */ int isatty; /* rfd is a tty */ +#ifdef _AIX int wfd_isatty; /* wfd is a tty */ +#endif int client_tty; /* (client) TTY has been requested */ int force_drain; /* force close on iEOF */ + time_t notbefore; /* Pause IO until deadline (time_t) */ int delayed; /* post-select handlers for newly created * channels are delayed until the first call - * to a matching pre-select handler. + * to a matching pre-select handler. * this way post-select handlers are not - * accidenly called if a FD gets reused */ + * accidentally called if a FD gets reused */ Buffer input; /* data read from socket, to be sent over * encrypted connection */ Buffer output; /* data received over encrypted connection for @@ -116,6 +124,7 @@ struct Channel { char *path; /* path for unix domain sockets, or host name for forwards */ int listening_port; /* port being listened for forwards */ + char *listening_addr; /* addr being listened for forwards */ int host_port; /* remote port to connect for forwards */ char *remote_name; /* remote hostname */ @@ -221,21 +230,22 @@ void channel_send_window_changes(void); /* protocol handler */ -void channel_input_close(int, u_int32_t, void *); -void channel_input_close_confirmation(int, u_int32_t, void *); -void channel_input_data(int, u_int32_t, void *); -void channel_input_extended_data(int, u_int32_t, void *); -void channel_input_ieof(int, u_int32_t, void *); -void channel_input_oclose(int, u_int32_t, void *); -void channel_input_open_confirmation(int, u_int32_t, void *); -void channel_input_open_failure(int, u_int32_t, void *); -void channel_input_port_open(int, u_int32_t, void *); -void channel_input_window_adjust(int, u_int32_t, void *); -void channel_input_status_confirm(int, u_int32_t, void *); +int channel_input_close(int, u_int32_t, void *); +int channel_input_close_confirmation(int, u_int32_t, void *); +int channel_input_data(int, u_int32_t, void *); +int channel_input_extended_data(int, u_int32_t, void *); +int channel_input_ieof(int, u_int32_t, void *); +int channel_input_oclose(int, u_int32_t, void *); +int channel_input_open_confirmation(int, u_int32_t, void *); +int channel_input_open_failure(int, u_int32_t, void *); +int channel_input_port_open(int, u_int32_t, void *); +int channel_input_window_adjust(int, u_int32_t, void *); +int channel_input_status_confirm(int, u_int32_t, void *); /* file descriptor handling (read/write) */ -void channel_prepare_select(fd_set **, fd_set **, int *, u_int*, int); +void channel_prepare_select(fd_set **, fd_set **, int *, u_int*, + time_t*, int); void channel_after_select(fd_set *, fd_set *); void channel_output_poll(void); @@ -246,33 +256,41 @@ char *channel_open_message(void); int channel_find_open(void); /* tcp forwarding */ +struct Forward; +struct ForwardOptions; void channel_set_af(int af); void channel_permit_all_opens(void); void channel_add_permitted_opens(char *, int); int channel_add_adm_permitted_opens(char *, int); +void channel_disable_adm_local_opens(void); +void channel_update_permitted_opens(int, int); void channel_clear_permitted_opens(void); void channel_clear_adm_permitted_opens(void); void channel_print_adm_permitted_opens(void); -int channel_input_port_forward_request(int, int); -Channel *channel_connect_to(const char *, u_short, char *, char *); +int channel_input_port_forward_request(int, struct ForwardOptions *); +Channel *channel_connect_to_port(const char *, u_short, char *, char *); +Channel *channel_connect_to_path(const char *, char *, char *); Channel *channel_connect_stdio_fwd(const char*, u_short, int, int); -Channel *channel_connect_by_listen_address(u_short, char *, char *); -int channel_request_remote_forwarding(const char *, u_short, - const char *, u_short); -int channel_setup_local_fwd_listener(const char *, u_short, - const char *, u_short, int); -void channel_request_rforward_cancel(const char *host, u_short port); -int channel_setup_remote_fwd_listener(const char *, u_short, int *, int); -int channel_cancel_rport_listener(const char *, u_short); +Channel *channel_connect_by_listen_address(const char *, u_short, + char *, char *); +Channel *channel_connect_by_listen_path(const char *, char *, char *); +int channel_request_remote_forwarding(struct Forward *); +int channel_setup_local_fwd_listener(struct Forward *, struct ForwardOptions *); +int channel_request_rforward_cancel(struct Forward *); +int channel_setup_remote_fwd_listener(struct Forward *, int *, struct ForwardOptions *); +int channel_cancel_rport_listener(struct Forward *); +int channel_cancel_lport_listener(struct Forward *, int, struct ForwardOptions *); +int permitopen_port(const char *); /* x11 forwarding */ +void channel_set_x11_refuse_time(u_int); int x11_connect_display(void); int x11_create_display_inet(int, int, int, u_int *, int **); -void x11_input_open(int, u_int32_t, void *); +int x11_input_open(int, u_int32_t, void *); void x11_request_forwarding_with_spoofing(int, const char *, const char *, const char *, int); -void deny_input_open(int, u_int32_t, void *); +int deny_input_open(int, u_int32_t, void *); /* agent forwarding */ diff --git a/cipher-3des1.c b/cipher-3des1.c index b7aa588..6a0f1f3 100644 --- a/cipher-3des1.c +++ b/cipher-3des1.c @@ -1,15 +1,10 @@ -/* $OpenBSD: cipher-3des1.c,v 1.7 2010/10/01 23:05:32 djm Exp $ */ +/* $OpenBSD: cipher-3des1.c,v 1.12 2015/01/14 10:24:42 markus Exp $ */ /* * Copyright (c) 2003 Markus Friedl. All rights reserved. * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES @@ -26,16 +21,10 @@ #include "includes.h" #include - +#include #include -#include -#include - -#include "xmalloc.h" -#include "log.h" - -#include "openbsd-compat/openssl-compat.h" +#include "ssherr.h" /* * This is used by SSH1: @@ -57,7 +46,7 @@ struct ssh1_3des_ctx }; const EVP_CIPHER * evp_ssh1_3des(void); -void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); +int ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); static int ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, @@ -67,11 +56,12 @@ ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, u_char *k1, *k2, *k3; if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - c = xmalloc(sizeof(*c)); + if ((c = calloc(1, sizeof(*c))) == NULL) + return 0; EVP_CIPHER_CTX_set_app_data(ctx, c); } if (key == NULL) - return (1); + return 1; if (enc == -1) enc = ctx->encrypt; k1 = k2 = k3 = (u_char *) key; @@ -85,44 +75,29 @@ ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, EVP_CIPHER_CTX_init(&c->k1); EVP_CIPHER_CTX_init(&c->k2); EVP_CIPHER_CTX_init(&c->k3); -#ifdef SSH_OLD_EVP - EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc); - EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc); - EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc); -#else if (EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 || EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 || EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) { - memset(c, 0, sizeof(*c)); - xfree(c); + explicit_bzero(c, sizeof(*c)); + free(c); EVP_CIPHER_CTX_set_app_data(ctx, NULL); - return (0); + return 0; } -#endif - return (1); + return 1; } static int -ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, - LIBCRYPTO_EVP_INL_TYPE len) +ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, size_t len) { struct ssh1_3des_ctx *c; - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - error("ssh1_3des_cbc: no context"); - return (0); - } -#ifdef SSH_OLD_EVP - EVP_Cipher(&c->k1, dest, (u_char *)src, len); - EVP_Cipher(&c->k2, dest, dest, len); - EVP_Cipher(&c->k3, dest, dest, len); -#else + if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) + return 0; if (EVP_Cipher(&c->k1, dest, (u_char *)src, len) == 0 || EVP_Cipher(&c->k2, dest, dest, len) == 0 || EVP_Cipher(&c->k3, dest, dest, len) == 0) - return (0); -#endif - return (1); + return 0; + return 1; } static int @@ -134,33 +109,32 @@ ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx) EVP_CIPHER_CTX_cleanup(&c->k1); EVP_CIPHER_CTX_cleanup(&c->k2); EVP_CIPHER_CTX_cleanup(&c->k3); - memset(c, 0, sizeof(*c)); - xfree(c); + explicit_bzero(c, sizeof(*c)); + free(c); EVP_CIPHER_CTX_set_app_data(ctx, NULL); } - return (1); + return 1; } -void +int ssh1_3des_iv(EVP_CIPHER_CTX *evp, int doset, u_char *iv, int len) { struct ssh1_3des_ctx *c; if (len != 24) - fatal("%s: bad 3des iv length: %d", __func__, len); + return SSH_ERR_INVALID_ARGUMENT; if ((c = EVP_CIPHER_CTX_get_app_data(evp)) == NULL) - fatal("%s: no 3des context", __func__); + return SSH_ERR_INTERNAL_ERROR; if (doset) { - debug3("%s: Installed 3DES IV", __func__); memcpy(c->k1.iv, iv, 8); memcpy(c->k2.iv, iv + 8, 8); memcpy(c->k3.iv, iv + 16, 8); } else { - debug3("%s: Copying 3DES IV", __func__); memcpy(iv, c->k1.iv, 8); memcpy(iv + 8, c->k2.iv, 8); memcpy(iv + 16, c->k3.iv, 8); } + return 0; } const EVP_CIPHER * @@ -168,7 +142,7 @@ evp_ssh1_3des(void) { static EVP_CIPHER ssh1_3des; - memset(&ssh1_3des, 0, sizeof(EVP_CIPHER)); + memset(&ssh1_3des, 0, sizeof(ssh1_3des)); ssh1_3des.nid = NID_undef; ssh1_3des.block_size = 8; ssh1_3des.iv_len = 0; @@ -176,8 +150,6 @@ evp_ssh1_3des(void) ssh1_3des.init = ssh1_3des_init; ssh1_3des.cleanup = ssh1_3des_cleanup; ssh1_3des.do_cipher = ssh1_3des_cbc; -#ifndef SSH_OLD_EVP ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH; -#endif - return (&ssh1_3des); + return &ssh1_3des; } diff --git a/cipher-aes.c b/cipher-aes.c index bfda6d2..8b10172 100644 --- a/cipher-aes.c +++ b/cipher-aes.c @@ -46,9 +46,6 @@ struct ssh_rijndael_ctx u_char r_iv[RIJNDAEL_BLOCKSIZE]; }; -const EVP_CIPHER * evp_rijndael(void); -void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); - static int ssh_rijndael_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, int enc) @@ -123,7 +120,7 @@ ssh_rijndael_cleanup(EVP_CIPHER_CTX *ctx) if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) { memset(c, 0, sizeof(*c)); - xfree(c); + free(c); EVP_CIPHER_CTX_set_app_data(ctx, NULL); } return (1); diff --git a/cipher-aesctr.c b/cipher-aesctr.c new file mode 100644 index 0000000..eed95c3 --- /dev/null +++ b/cipher-aesctr.c @@ -0,0 +1,83 @@ +/* $OpenBSD: cipher-aesctr.c,v 1.2 2015/01/14 10:24:42 markus Exp $ */ +/* + * Copyright (c) 2003 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include + +#ifndef WITH_OPENSSL + +#include "cipher-aesctr.h" + +/* + * increment counter 'ctr', + * the counter is of size 'len' bytes and stored in network-byte-order. + * (LSB at ctr[len-1], MSB at ctr[0]) + */ +static inline void +aesctr_inc(u8 *ctr, u32 len) +{ + ssize_t i; + +#ifndef CONSTANT_TIME_INCREMENT + for (i = len - 1; i >= 0; i--) + if (++ctr[i]) /* continue on overflow */ + return; +#else + u8 x, add = 1; + + for (i = len - 1; i >= 0; i--) { + ctr[i] += add; + /* constant time for: x = ctr[i] ? 1 : 0 */ + x = ctr[i]; + x = (x | (x >> 4)) & 0xf; + x = (x | (x >> 2)) & 0x3; + x = (x | (x >> 1)) & 0x1; + add *= (x^1); + } +#endif +} + +void +aesctr_keysetup(aesctr_ctx *x,const u8 *k,u32 kbits,u32 ivbits) +{ + x->rounds = rijndaelKeySetupEnc(x->ek, k, kbits); +} + +void +aesctr_ivsetup(aesctr_ctx *x,const u8 *iv) +{ + memcpy(x->ctr, iv, AES_BLOCK_SIZE); +} + +void +aesctr_encrypt_bytes(aesctr_ctx *x,const u8 *m,u8 *c,u32 bytes) +{ + u32 n = 0; + u8 buf[AES_BLOCK_SIZE]; + + while ((bytes--) > 0) { + if (n == 0) { + rijndaelEncrypt(x->ek, x->rounds, x->ctr, buf); + aesctr_inc(x->ctr, AES_BLOCK_SIZE); + } + *(c++) = *(m++) ^ buf[n]; + n = (n + 1) % AES_BLOCK_SIZE; + } +} +#endif /* !WITH_OPENSSL */ diff --git a/cipher-aesctr.h b/cipher-aesctr.h new file mode 100644 index 0000000..85d55bb --- /dev/null +++ b/cipher-aesctr.h @@ -0,0 +1,35 @@ +/* $OpenBSD: cipher-aesctr.h,v 1.1 2014/04/29 15:39:33 markus Exp $ */ +/* + * Copyright (c) 2014 Markus Friedl + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef OPENSSH_AESCTR_H +#define OPENSSH_AESCTR_H + +#include "rijndael.h" + +#define AES_BLOCK_SIZE 16 + +typedef struct aesctr_ctx { + int rounds; /* keylen-dependent #rounds */ + u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */ + u8 ctr[AES_BLOCK_SIZE]; /* counter */ +} aesctr_ctx; + +void aesctr_keysetup(aesctr_ctx *x,const u8 *k,u32 kbits,u32 ivbits); +void aesctr_ivsetup(aesctr_ctx *x,const u8 *iv); +void aesctr_encrypt_bytes(aesctr_ctx *x,const u8 *m,u8 *c,u32 bytes); + +#endif diff --git a/cipher-bf1.c b/cipher-bf1.c index 309509d..ee72ac0 100644 --- a/cipher-bf1.c +++ b/cipher-bf1.c @@ -1,15 +1,10 @@ -/* $OpenBSD: cipher-bf1.c,v 1.6 2010/10/01 23:05:32 djm Exp $ */ +/* $OpenBSD: cipher-bf1.c,v 1.7 2015/01/14 10:24:42 markus Exp $ */ /* * Copyright (c) 2003 Markus Friedl. All rights reserved. * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES @@ -25,15 +20,14 @@ #include "includes.h" -#include +#ifdef WITH_OPENSSL -#include +#include #include #include -#include "xmalloc.h" -#include "log.h" +#include #include "openbsd-compat/openssl-compat.h" @@ -106,3 +100,4 @@ evp_ssh1_bf(void) ssh1_bf.key_len = 32; return (&ssh1_bf); } +#endif /* WITH_OPENSSL */ diff --git a/cipher-chachapoly.c b/cipher-chachapoly.c new file mode 100644 index 0000000..7f31ff4 --- /dev/null +++ b/cipher-chachapoly.c @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2013 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* $OpenBSD: cipher-chachapoly.c,v 1.7 2015/01/14 10:24:42 markus Exp $ */ + +#include "includes.h" + +#include +#include /* needed for log.h */ +#include +#include /* needed for misc.h */ + +#include "log.h" +#include "sshbuf.h" +#include "ssherr.h" +#include "cipher-chachapoly.h" + +int chachapoly_init(struct chachapoly_ctx *ctx, + const u_char *key, u_int keylen) +{ + if (keylen != (32 + 32)) /* 2 x 256 bit keys */ + return SSH_ERR_INVALID_ARGUMENT; + chacha_keysetup(&ctx->main_ctx, key, 256); + chacha_keysetup(&ctx->header_ctx, key + 32, 256); + return 0; +} + +/* + * chachapoly_crypt() operates as following: + * En/decrypt with header key 'aadlen' bytes from 'src', storing result + * to 'dest'. The ciphertext here is treated as additional authenticated + * data for MAC calculation. + * En/decrypt 'len' bytes at offset 'aadlen' from 'src' to 'dest'. Use + * POLY1305_TAGLEN bytes at offset 'len'+'aadlen' as the authentication + * tag. This tag is written on encryption and verified on decryption. + */ +int +chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest, + const u_char *src, u_int len, u_int aadlen, u_int authlen, int do_encrypt) +{ + u_char seqbuf[8]; + const u_char one[8] = { 1, 0, 0, 0, 0, 0, 0, 0 }; /* NB little-endian */ + u_char expected_tag[POLY1305_TAGLEN], poly_key[POLY1305_KEYLEN]; + int r = SSH_ERR_INTERNAL_ERROR; + + /* + * Run ChaCha20 once to generate the Poly1305 key. The IV is the + * packet sequence number. + */ + memset(poly_key, 0, sizeof(poly_key)); + POKE_U64(seqbuf, seqnr); + chacha_ivsetup(&ctx->main_ctx, seqbuf, NULL); + chacha_encrypt_bytes(&ctx->main_ctx, + poly_key, poly_key, sizeof(poly_key)); + + /* If decrypting, check tag before anything else */ + if (!do_encrypt) { + const u_char *tag = src + aadlen + len; + + poly1305_auth(expected_tag, src, aadlen + len, poly_key); + if (timingsafe_bcmp(expected_tag, tag, POLY1305_TAGLEN) != 0) { + r = SSH_ERR_MAC_INVALID; + goto out; + } + } + + /* Crypt additional data */ + if (aadlen) { + chacha_ivsetup(&ctx->header_ctx, seqbuf, NULL); + chacha_encrypt_bytes(&ctx->header_ctx, src, dest, aadlen); + } + + /* Set Chacha's block counter to 1 */ + chacha_ivsetup(&ctx->main_ctx, seqbuf, one); + chacha_encrypt_bytes(&ctx->main_ctx, src + aadlen, + dest + aadlen, len); + + /* If encrypting, calculate and append tag */ + if (do_encrypt) { + poly1305_auth(dest + aadlen + len, dest, aadlen + len, + poly_key); + } + r = 0; + out: + explicit_bzero(expected_tag, sizeof(expected_tag)); + explicit_bzero(seqbuf, sizeof(seqbuf)); + explicit_bzero(poly_key, sizeof(poly_key)); + return r; +} + +/* Decrypt and extract the encrypted packet length */ +int +chachapoly_get_length(struct chachapoly_ctx *ctx, + u_int *plenp, u_int seqnr, const u_char *cp, u_int len) +{ + u_char buf[4], seqbuf[8]; + + if (len < 4) + return SSH_ERR_MESSAGE_INCOMPLETE; + POKE_U64(seqbuf, seqnr); + chacha_ivsetup(&ctx->header_ctx, seqbuf, NULL); + chacha_encrypt_bytes(&ctx->header_ctx, cp, buf, 4); + *plenp = PEEK_U32(buf); + return 0; +} diff --git a/cipher-chachapoly.h b/cipher-chachapoly.h new file mode 100644 index 0000000..b7072be --- /dev/null +++ b/cipher-chachapoly.h @@ -0,0 +1,41 @@ +/* $OpenBSD: cipher-chachapoly.h,v 1.4 2014/06/24 01:13:21 djm Exp $ */ + +/* + * Copyright (c) Damien Miller 2013 + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#ifndef CHACHA_POLY_AEAD_H +#define CHACHA_POLY_AEAD_H + +#include +#include "chacha.h" +#include "poly1305.h" + +#define CHACHA_KEYLEN 32 /* Only 256 bit keys used here */ + +struct chachapoly_ctx { + struct chacha_ctx main_ctx, header_ctx; +}; + +int chachapoly_init(struct chachapoly_ctx *cpctx, + const u_char *key, u_int keylen) + __attribute__((__bounded__(__buffer__, 2, 3))); +int chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr, + u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen, + int do_encrypt); +int chachapoly_get_length(struct chachapoly_ctx *cpctx, + u_int *plenp, u_int seqnr, const u_char *cp, u_int len) + __attribute__((__bounded__(__buffer__, 4, 5))); + +#endif /* CHACHA_POLY_AEAD_H */ diff --git a/cipher-ctr.c b/cipher-ctr.c index 04975b4..32771f2 100644 --- a/cipher-ctr.c +++ b/cipher-ctr.c @@ -16,6 +16,7 @@ */ #include "includes.h" +#if defined(WITH_OPENSSL) && !defined(OPENSSL_HAVE_EVPCTR) #include #include @@ -33,9 +34,6 @@ #include #endif -const EVP_CIPHER *evp_aes_128_ctr(void); -void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t); - struct ssh_aes_ctr_ctx { AES_KEY aes_ctx; @@ -106,7 +104,7 @@ ssh_aes_ctr_cleanup(EVP_CIPHER_CTX *ctx) if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) { memset(c, 0, sizeof(*c)); - xfree(c); + free(c); EVP_CIPHER_CTX_set_app_data(ctx, NULL); } return (1); @@ -144,3 +142,5 @@ evp_aes_128_ctr(void) #endif return (&aes_ctr); } + +#endif /* defined(WITH_OPENSSL) && !defined(OPENSSL_HAVE_EVPCTR) */ diff --git a/cipher.c b/cipher.c index bb5c0ac..02dae6f 100644 --- a/cipher.c +++ b/cipher.c @@ -1,4 +1,4 @@ -/* $OpenBSD: cipher.c,v 1.82 2009/01/26 09:58:15 markus Exp $ */ +/* $OpenBSD: cipher.c,v 1.100 2015/01/14 10:29:45 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -39,82 +39,162 @@ #include -#include - #include #include +#include -#include "xmalloc.h" -#include "log.h" #include "cipher.h" +#include "misc.h" +#include "sshbuf.h" +#include "ssherr.h" +#include "digest.h" -/* compatibility with old or broken OpenSSL versions */ #include "openbsd-compat/openssl-compat.h" +#ifdef WITH_SSH1 extern const EVP_CIPHER *evp_ssh1_bf(void); extern const EVP_CIPHER *evp_ssh1_3des(void); -extern void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); -extern const EVP_CIPHER *evp_aes_128_ctr(void); -extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); +extern int ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); +#endif -struct Cipher { +struct sshcipher { char *name; int number; /* for ssh1 only */ u_int block_size; u_int key_len; + u_int iv_len; /* defaults to block_size */ + u_int auth_len; u_int discard_len; - u_int cbc_mode; + u_int flags; +#define CFLAG_CBC (1<<0) +#define CFLAG_CHACHAPOLY (1<<1) +#define CFLAG_AESCTR (1<<2) +#define CFLAG_NONE (1<<3) +#ifdef WITH_OPENSSL const EVP_CIPHER *(*evptype)(void); -} ciphers[] = { - { "none", SSH_CIPHER_NONE, 8, 0, 0, 0, EVP_enc_null }, - { "des", SSH_CIPHER_DES, 8, 8, 0, 1, EVP_des_cbc }, - { "3des", SSH_CIPHER_3DES, 8, 16, 0, 1, evp_ssh1_3des }, - { "blowfish", SSH_CIPHER_BLOWFISH, 8, 32, 0, 1, evp_ssh1_bf }, - - { "3des-cbc", SSH_CIPHER_SSH2, 8, 24, 0, 1, EVP_des_ede3_cbc }, - { "blowfish-cbc", SSH_CIPHER_SSH2, 8, 16, 0, 1, EVP_bf_cbc }, - { "cast128-cbc", SSH_CIPHER_SSH2, 8, 16, 0, 1, EVP_cast5_cbc }, - { "arcfour", SSH_CIPHER_SSH2, 8, 16, 0, 0, EVP_rc4 }, - { "arcfour128", SSH_CIPHER_SSH2, 8, 16, 1536, 0, EVP_rc4 }, - { "arcfour256", SSH_CIPHER_SSH2, 8, 32, 1536, 0, EVP_rc4 }, - { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, 0, 1, EVP_aes_128_cbc }, - { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, 0, 1, EVP_aes_192_cbc }, - { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, 0, 1, EVP_aes_256_cbc }, - { "rijndael-cbc@lysator.liu.se", - SSH_CIPHER_SSH2, 16, 32, 0, 1, EVP_aes_256_cbc }, - { "aes128-ctr", SSH_CIPHER_SSH2, 16, 16, 0, 0, evp_aes_128_ctr }, - { "aes192-ctr", SSH_CIPHER_SSH2, 16, 24, 0, 0, evp_aes_128_ctr }, - { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, 0, 0, evp_aes_128_ctr }, -#ifdef USE_CIPHER_ACSS - { "acss@openssh.org", SSH_CIPHER_SSH2, 16, 5, 0, 0, EVP_acss }, +#else + void *ignored; #endif - { NULL, SSH_CIPHER_INVALID, 0, 0, 0, 0, NULL } +}; + +static const struct sshcipher ciphers[] = { +#ifdef WITH_SSH1 + { "des", SSH_CIPHER_DES, 8, 8, 0, 0, 0, 1, EVP_des_cbc }, + { "3des", SSH_CIPHER_3DES, 8, 16, 0, 0, 0, 1, evp_ssh1_3des }, + { "blowfish", SSH_CIPHER_BLOWFISH, 8, 32, 0, 0, 0, 1, evp_ssh1_bf }, +#endif /* WITH_SSH1 */ +#ifdef WITH_OPENSSL + { "none", SSH_CIPHER_NONE, 8, 0, 0, 0, 0, 0, EVP_enc_null }, + { "3des-cbc", SSH_CIPHER_SSH2, 8, 24, 0, 0, 0, 1, EVP_des_ede3_cbc }, + { "blowfish-cbc", + SSH_CIPHER_SSH2, 8, 16, 0, 0, 0, 1, EVP_bf_cbc }, + { "cast128-cbc", + SSH_CIPHER_SSH2, 8, 16, 0, 0, 0, 1, EVP_cast5_cbc }, + { "arcfour", SSH_CIPHER_SSH2, 8, 16, 0, 0, 0, 0, EVP_rc4 }, + { "arcfour128", SSH_CIPHER_SSH2, 8, 16, 0, 0, 1536, 0, EVP_rc4 }, + { "arcfour256", SSH_CIPHER_SSH2, 8, 32, 0, 0, 1536, 0, EVP_rc4 }, + { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, 0, 0, 0, 1, EVP_aes_128_cbc }, + { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, 0, 0, 0, 1, EVP_aes_192_cbc }, + { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 1, EVP_aes_256_cbc }, + { "rijndael-cbc@lysator.liu.se", + SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 1, EVP_aes_256_cbc }, + { "aes128-ctr", SSH_CIPHER_SSH2, 16, 16, 0, 0, 0, 0, EVP_aes_128_ctr }, + { "aes192-ctr", SSH_CIPHER_SSH2, 16, 24, 0, 0, 0, 0, EVP_aes_192_ctr }, + { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, 0, EVP_aes_256_ctr }, +# ifdef OPENSSL_HAVE_EVPGCM + { "aes128-gcm@openssh.com", + SSH_CIPHER_SSH2, 16, 16, 12, 16, 0, 0, EVP_aes_128_gcm }, + { "aes256-gcm@openssh.com", + SSH_CIPHER_SSH2, 16, 32, 12, 16, 0, 0, EVP_aes_256_gcm }, +# endif /* OPENSSL_HAVE_EVPGCM */ +#else /* WITH_OPENSSL */ + { "aes128-ctr", SSH_CIPHER_SSH2, 16, 16, 0, 0, 0, CFLAG_AESCTR, NULL }, + { "aes192-ctr", SSH_CIPHER_SSH2, 16, 24, 0, 0, 0, CFLAG_AESCTR, NULL }, + { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, 0, 0, 0, CFLAG_AESCTR, NULL }, + { "none", SSH_CIPHER_NONE, 8, 0, 0, 0, 0, CFLAG_NONE, NULL }, +#endif /* WITH_OPENSSL */ + { "chacha20-poly1305@openssh.com", + SSH_CIPHER_SSH2, 8, 64, 0, 16, 0, CFLAG_CHACHAPOLY, NULL }, + + { NULL, SSH_CIPHER_INVALID, 0, 0, 0, 0, 0, 0, NULL } }; /*--*/ +/* Returns a comma-separated list of supported ciphers. */ +char * +cipher_alg_list(char sep, int auth_only) +{ + char *tmp, *ret = NULL; + size_t nlen, rlen = 0; + const struct sshcipher *c; + + for (c = ciphers; c->name != NULL; c++) { + if (c->number != SSH_CIPHER_SSH2) + continue; + if (auth_only && c->auth_len == 0) + continue; + if (ret != NULL) + ret[rlen++] = sep; + nlen = strlen(c->name); + if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) { + free(ret); + return NULL; + } + ret = tmp; + memcpy(ret + rlen, c->name, nlen + 1); + rlen += nlen; + } + return ret; +} + u_int -cipher_blocksize(const Cipher *c) +cipher_blocksize(const struct sshcipher *c) { return (c->block_size); } u_int -cipher_keylen(const Cipher *c) +cipher_keylen(const struct sshcipher *c) { return (c->key_len); } u_int -cipher_get_number(const Cipher *c) +cipher_seclen(const struct sshcipher *c) +{ + if (strcmp("3des-cbc", c->name) == 0) + return 14; + return cipher_keylen(c); +} + +u_int +cipher_authlen(const struct sshcipher *c) +{ + return (c->auth_len); +} + +u_int +cipher_ivlen(const struct sshcipher *c) +{ + /* + * Default is cipher block size, except for chacha20+poly1305 that + * needs no IV. XXX make iv_len == -1 default? + */ + return (c->iv_len != 0 || (c->flags & CFLAG_CHACHAPOLY) != 0) ? + c->iv_len : c->block_size; +} + +u_int +cipher_get_number(const struct sshcipher *c) { return (c->number); } u_int -cipher_is_cbc(const Cipher *c) +cipher_is_cbc(const struct sshcipher *c) { - return (c->cbc_mode); + return (c->flags & CFLAG_CBC) != 0; } u_int @@ -129,20 +209,20 @@ cipher_mask_ssh1(int client) return mask; } -Cipher * +const struct sshcipher * cipher_by_name(const char *name) { - Cipher *c; + const struct sshcipher *c; for (c = ciphers; c->name != NULL; c++) if (strcmp(c->name, name) == 0) return c; return NULL; } -Cipher * +const struct sshcipher * cipher_by_number(int id) { - Cipher *c; + const struct sshcipher *c; for (c = ciphers; c->name != NULL; c++) if (c->number == id) return c; @@ -153,26 +233,23 @@ cipher_by_number(int id) int ciphers_valid(const char *names) { - Cipher *c; + const struct sshcipher *c; char *cipher_list, *cp; char *p; if (names == NULL || strcmp(names, "") == 0) return 0; - cipher_list = cp = xstrdup(names); + if ((cipher_list = cp = strdup(names)) == NULL) + return 0; for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0'; (p = strsep(&cp, CIPHER_SEP))) { c = cipher_by_name(p); if (c == NULL || c->number != SSH_CIPHER_SSH2) { - debug("bad cipher %s [%s]", p, names); - xfree(cipher_list); + free(cipher_list); return 0; - } else { - debug3("cipher ok: %s [%s]", p, names); } } - debug3("ciphers ok: [%s]", names); - xfree(cipher_list); + free(cipher_list); return 1; } @@ -184,7 +261,7 @@ ciphers_valid(const char *names) int cipher_number(const char *name) { - Cipher *c; + const struct sshcipher *c; if (name == NULL) return -1; for (c = ciphers; c->name != NULL; c++) @@ -196,236 +273,385 @@ cipher_number(const char *name) char * cipher_name(int id) { - Cipher *c = cipher_by_number(id); + const struct sshcipher *c = cipher_by_number(id); return (c==NULL) ? "" : c->name; } -void -cipher_init(CipherContext *cc, Cipher *cipher, +const char * +cipher_warning_message(const struct sshcipher_ctx *cc) +{ + if (cc == NULL || cc->cipher == NULL) + return NULL; + if (cc->cipher->number == SSH_CIPHER_DES) + return "use of DES is strongly discouraged due to " + "cryptographic weaknesses"; + return NULL; +} + +int +cipher_init(struct sshcipher_ctx *cc, const struct sshcipher *cipher, const u_char *key, u_int keylen, const u_char *iv, u_int ivlen, int do_encrypt) { - static int dowarn = 1; -#ifdef SSH_OLD_EVP - EVP_CIPHER *type; -#else +#ifdef WITH_OPENSSL + int ret = SSH_ERR_INTERNAL_ERROR; const EVP_CIPHER *type; int klen; -#endif u_char *junk, *discard; if (cipher->number == SSH_CIPHER_DES) { - if (dowarn) { - error("Warning: use of DES is strongly discouraged " - "due to cryptographic weaknesses"); - dowarn = 0; - } if (keylen > 8) keylen = 8; } +#endif cc->plaintext = (cipher->number == SSH_CIPHER_NONE); + cc->encrypt = do_encrypt; + + if (keylen < cipher->key_len || + (iv != NULL && ivlen < cipher_ivlen(cipher))) + return SSH_ERR_INVALID_ARGUMENT; - if (keylen < cipher->key_len) - fatal("cipher_init: key length %d is insufficient for %s.", - keylen, cipher->name); - if (iv != NULL && ivlen < cipher->block_size) - fatal("cipher_init: iv length %d is insufficient for %s.", - ivlen, cipher->name); cc->cipher = cipher; - - type = (*cipher->evptype)(); - - EVP_CIPHER_CTX_init(&cc->evp); -#ifdef SSH_OLD_EVP - if (type->key_len > 0 && type->key_len != keylen) { - debug("cipher_init: set keylen (%d -> %d)", - type->key_len, keylen); - type->key_len = keylen; + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) { + return chachapoly_init(&cc->cp_ctx, key, keylen); } - EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv, - (do_encrypt == CIPHER_ENCRYPT)); +#ifndef WITH_OPENSSL + if ((cc->cipher->flags & CFLAG_AESCTR) != 0) { + aesctr_keysetup(&cc->ac_ctx, key, 8 * keylen, 8 * ivlen); + aesctr_ivsetup(&cc->ac_ctx, iv); + return 0; + } + if ((cc->cipher->flags & CFLAG_NONE) != 0) + return 0; + return SSH_ERR_INVALID_ARGUMENT; #else + type = (*cipher->evptype)(); + EVP_CIPHER_CTX_init(&cc->evp); if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv, - (do_encrypt == CIPHER_ENCRYPT)) == 0) - fatal("cipher_init: EVP_CipherInit failed for %s", - cipher->name); + (do_encrypt == CIPHER_ENCRYPT)) == 0) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto bad; + } + if (cipher_authlen(cipher) && + !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_SET_IV_FIXED, + -1, (u_char *)iv)) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto bad; + } klen = EVP_CIPHER_CTX_key_length(&cc->evp); if (klen > 0 && keylen != (u_int)klen) { - debug2("cipher_init: set keylen (%d -> %d)", klen, keylen); - if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0) - fatal("cipher_init: set keylen failed (%d -> %d)", - klen, keylen); + if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto bad; + } + } + if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto bad; } - if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0) - fatal("cipher_init: EVP_CipherInit: set key failed for %s", - cipher->name); -#endif if (cipher->discard_len > 0) { - junk = xmalloc(cipher->discard_len); - discard = xmalloc(cipher->discard_len); - if (EVP_Cipher(&cc->evp, discard, junk, - cipher->discard_len) == 0) - fatal("evp_crypt: EVP_Cipher failed during discard"); - memset(discard, 0, cipher->discard_len); - xfree(junk); - xfree(discard); + if ((junk = malloc(cipher->discard_len)) == NULL || + (discard = malloc(cipher->discard_len)) == NULL) { + if (junk != NULL) + free(junk); + ret = SSH_ERR_ALLOC_FAIL; + goto bad; + } + ret = EVP_Cipher(&cc->evp, discard, junk, cipher->discard_len); + explicit_bzero(discard, cipher->discard_len); + free(junk); + free(discard); + if (ret != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + bad: + EVP_CIPHER_CTX_cleanup(&cc->evp); + return ret; + } } +#endif + return 0; } -void -cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len) +/* + * cipher_crypt() operates as following: + * Copy 'aadlen' bytes (without en/decryption) from 'src' to 'dest'. + * Theses bytes are treated as additional authenticated data for + * authenticated encryption modes. + * En/Decrypt 'len' bytes at offset 'aadlen' from 'src' to 'dest'. + * Use 'authlen' bytes at offset 'len'+'aadlen' as the authentication tag. + * This tag is written on encryption and verified on decryption. + * Both 'aadlen' and 'authlen' can be set to 0. + */ +int +cipher_crypt(struct sshcipher_ctx *cc, u_int seqnr, u_char *dest, + const u_char *src, u_int len, u_int aadlen, u_int authlen) { + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) { + return chachapoly_crypt(&cc->cp_ctx, seqnr, dest, src, + len, aadlen, authlen, cc->encrypt); + } +#ifndef WITH_OPENSSL + if ((cc->cipher->flags & CFLAG_AESCTR) != 0) { + if (aadlen) + memcpy(dest, src, aadlen); + aesctr_encrypt_bytes(&cc->ac_ctx, src + aadlen, + dest + aadlen, len); + return 0; + } + if ((cc->cipher->flags & CFLAG_NONE) != 0) { + memcpy(dest, src, aadlen + len); + return 0; + } + return SSH_ERR_INVALID_ARGUMENT; +#else + if (authlen) { + u_char lastiv[1]; + + if (authlen != cipher_authlen(cc->cipher)) + return SSH_ERR_INVALID_ARGUMENT; + /* increment IV */ + if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN, + 1, lastiv)) + return SSH_ERR_LIBCRYPTO_ERROR; + /* set tag on decyption */ + if (!cc->encrypt && + !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_SET_TAG, + authlen, (u_char *)src + aadlen + len)) + return SSH_ERR_LIBCRYPTO_ERROR; + } + if (aadlen) { + if (authlen && + EVP_Cipher(&cc->evp, NULL, (u_char *)src, aadlen) < 0) + return SSH_ERR_LIBCRYPTO_ERROR; + memcpy(dest, src, aadlen); + } if (len % cc->cipher->block_size) - fatal("cipher_encrypt: bad plaintext length %d", len); - if (EVP_Cipher(&cc->evp, dest, (u_char *)src, len) == 0) - fatal("evp_crypt: EVP_Cipher failed"); + return SSH_ERR_INVALID_ARGUMENT; + if (EVP_Cipher(&cc->evp, dest + aadlen, (u_char *)src + aadlen, + len) < 0) + return SSH_ERR_LIBCRYPTO_ERROR; + if (authlen) { + /* compute tag (on encrypt) or verify tag (on decrypt) */ + if (EVP_Cipher(&cc->evp, NULL, NULL, 0) < 0) + return cc->encrypt ? + SSH_ERR_LIBCRYPTO_ERROR : SSH_ERR_MAC_INVALID; + if (cc->encrypt && + !EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_GET_TAG, + authlen, dest + aadlen + len)) + return SSH_ERR_LIBCRYPTO_ERROR; + } + return 0; +#endif } -void -cipher_cleanup(CipherContext *cc) +/* Extract the packet length, including any decryption necessary beforehand */ +int +cipher_get_length(struct sshcipher_ctx *cc, u_int *plenp, u_int seqnr, + const u_char *cp, u_int len) { - if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0) - error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed"); + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) + return chachapoly_get_length(&cc->cp_ctx, plenp, seqnr, + cp, len); + if (len < 4) + return SSH_ERR_MESSAGE_INCOMPLETE; + *plenp = get_u32(cp); + return 0; +} + +int +cipher_cleanup(struct sshcipher_ctx *cc) +{ + if (cc == NULL || cc->cipher == NULL) + return 0; + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) + explicit_bzero(&cc->cp_ctx, sizeof(cc->cp_ctx)); + else if ((cc->cipher->flags & CFLAG_AESCTR) != 0) + explicit_bzero(&cc->ac_ctx, sizeof(cc->ac_ctx)); +#ifdef WITH_OPENSSL + else if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0) + return SSH_ERR_LIBCRYPTO_ERROR; +#endif + return 0; } /* * Selects the cipher, and keys if by computing the MD5 checksum of the * passphrase and using the resulting 16 bytes as the key. */ - -void -cipher_set_key_string(CipherContext *cc, Cipher *cipher, +int +cipher_set_key_string(struct sshcipher_ctx *cc, const struct sshcipher *cipher, const char *passphrase, int do_encrypt) { - MD5_CTX md; u_char digest[16]; + int r = SSH_ERR_INTERNAL_ERROR; - MD5_Init(&md); - MD5_Update(&md, (const u_char *)passphrase, strlen(passphrase)); - MD5_Final(digest, &md); + if ((r = ssh_digest_memory(SSH_DIGEST_MD5, + passphrase, strlen(passphrase), + digest, sizeof(digest))) != 0) + goto out; - cipher_init(cc, cipher, digest, 16, NULL, 0, do_encrypt); - - memset(digest, 0, sizeof(digest)); - memset(&md, 0, sizeof(md)); + r = cipher_init(cc, cipher, digest, 16, NULL, 0, do_encrypt); + out: + explicit_bzero(digest, sizeof(digest)); + return r; } /* - * Exports an IV from the CipherContext required to export the key + * Exports an IV from the sshcipher_ctx required to export the key * state back from the unprivileged child to the privileged parent * process. */ - int -cipher_get_keyiv_len(const CipherContext *cc) +cipher_get_keyiv_len(const struct sshcipher_ctx *cc) { - Cipher *c = cc->cipher; - int ivlen; + const struct sshcipher *c = cc->cipher; + int ivlen = 0; if (c->number == SSH_CIPHER_3DES) ivlen = 24; + else if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) + ivlen = 0; + else if ((cc->cipher->flags & CFLAG_AESCTR) != 0) + ivlen = sizeof(cc->ac_ctx.ctr); +#ifdef WITH_OPENSSL else ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp); +#endif /* WITH_OPENSSL */ return (ivlen); } -void -cipher_get_keyiv(CipherContext *cc, u_char *iv, u_int len) +int +cipher_get_keyiv(struct sshcipher_ctx *cc, u_char *iv, u_int len) { - Cipher *c = cc->cipher; - int evplen; - - switch (c->number) { - case SSH_CIPHER_SSH2: - case SSH_CIPHER_DES: - case SSH_CIPHER_BLOWFISH: - evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); - if (evplen <= 0) - return; - if ((u_int)evplen != len) - fatal("%s: wrong iv length %d != %d", __func__, - evplen, len); -#ifdef USE_BUILTIN_RIJNDAEL - if (c->evptype == evp_rijndael) - ssh_rijndael_iv(&cc->evp, 0, iv, len); - else + const struct sshcipher *c = cc->cipher; +#ifdef WITH_OPENSSL + int evplen; #endif - if (c->evptype == evp_aes_128_ctr) - ssh_aes_ctr_iv(&cc->evp, 0, iv, len); - else - memcpy(iv, cc->evp.iv, len); - break; - case SSH_CIPHER_3DES: - ssh1_3des_iv(&cc->evp, 0, iv, 24); - break; - default: - fatal("%s: bad cipher %d", __func__, c->number); - } -} -void -cipher_set_keyiv(CipherContext *cc, u_char *iv) -{ - Cipher *c = cc->cipher; - int evplen = 0; + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) { + if (len != 0) + return SSH_ERR_INVALID_ARGUMENT; + return 0; + } + if ((cc->cipher->flags & CFLAG_AESCTR) != 0) { + if (len != sizeof(cc->ac_ctx.ctr)) + return SSH_ERR_INVALID_ARGUMENT; + memcpy(iv, cc->ac_ctx.ctr, len); + return 0; + } + if ((cc->cipher->flags & CFLAG_NONE) != 0) + return 0; switch (c->number) { +#ifdef WITH_OPENSSL case SSH_CIPHER_SSH2: case SSH_CIPHER_DES: case SSH_CIPHER_BLOWFISH: evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); if (evplen == 0) - return; -#ifdef USE_BUILTIN_RIJNDAEL - if (c->evptype == evp_rijndael) - ssh_rijndael_iv(&cc->evp, 1, iv, evplen); + return 0; + else if (evplen < 0) + return SSH_ERR_LIBCRYPTO_ERROR; + if ((u_int)evplen != len) + return SSH_ERR_INVALID_ARGUMENT; +#ifndef OPENSSL_HAVE_EVPCTR + if (c->evptype == evp_aes_128_ctr) + ssh_aes_ctr_iv(&cc->evp, 0, iv, len); else #endif - if (c->evptype == evp_aes_128_ctr) - ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen); - else - memcpy(cc->evp.iv, iv, evplen); + if (cipher_authlen(c)) { + if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN, + len, iv)) + return SSH_ERR_LIBCRYPTO_ERROR; + } else + memcpy(iv, cc->evp.iv, len); break; +#endif +#ifdef WITH_SSH1 case SSH_CIPHER_3DES: - ssh1_3des_iv(&cc->evp, 1, iv, 24); - break; + return ssh1_3des_iv(&cc->evp, 0, iv, 24); +#endif default: - fatal("%s: bad cipher %d", __func__, c->number); + return SSH_ERR_INVALID_ARGUMENT; } + return 0; } -#if OPENSSL_VERSION_NUMBER < 0x00907000L -#define EVP_X_STATE(evp) &(evp).c -#define EVP_X_STATE_LEN(evp) sizeof((evp).c) -#else +int +cipher_set_keyiv(struct sshcipher_ctx *cc, const u_char *iv) +{ + const struct sshcipher *c = cc->cipher; +#ifdef WITH_OPENSSL + int evplen = 0; +#endif + + if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) + return 0; + if ((cc->cipher->flags & CFLAG_NONE) != 0) + return 0; + + switch (c->number) { +#ifdef WITH_OPENSSL + case SSH_CIPHER_SSH2: + case SSH_CIPHER_DES: + case SSH_CIPHER_BLOWFISH: + evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); + if (evplen <= 0) + return SSH_ERR_LIBCRYPTO_ERROR; + if (cipher_authlen(c)) { + /* XXX iv arg is const, but EVP_CIPHER_CTX_ctrl isn't */ + if (!EVP_CIPHER_CTX_ctrl(&cc->evp, + EVP_CTRL_GCM_SET_IV_FIXED, -1, (void *)iv)) + return SSH_ERR_LIBCRYPTO_ERROR; + } else + memcpy(cc->evp.iv, iv, evplen); + break; +#endif +#ifdef WITH_SSH1 + case SSH_CIPHER_3DES: + return ssh1_3des_iv(&cc->evp, 1, (u_char *)iv, 24); +#endif + default: + return SSH_ERR_INVALID_ARGUMENT; + } + return 0; +} + +#ifdef WITH_OPENSSL #define EVP_X_STATE(evp) (evp).cipher_data #define EVP_X_STATE_LEN(evp) (evp).cipher->ctx_size #endif int -cipher_get_keycontext(const CipherContext *cc, u_char *dat) +cipher_get_keycontext(const struct sshcipher_ctx *cc, u_char *dat) { - Cipher *c = cc->cipher; +#ifdef WITH_OPENSSL + const struct sshcipher *c = cc->cipher; int plen = 0; - if (c->evptype == EVP_rc4 || c->evptype == EVP_acss) { + if (c->evptype == EVP_rc4) { plen = EVP_X_STATE_LEN(cc->evp); if (dat == NULL) return (plen); memcpy(dat, EVP_X_STATE(cc->evp), plen); } return (plen); +#else + return 0; +#endif } void -cipher_set_keycontext(CipherContext *cc, u_char *dat) +cipher_set_keycontext(struct sshcipher_ctx *cc, const u_char *dat) { - Cipher *c = cc->cipher; +#ifdef WITH_OPENSSL + const struct sshcipher *c = cc->cipher; int plen; - if (c->evptype == EVP_rc4 || c->evptype == EVP_acss) { + if (c->evptype == EVP_rc4) { plen = EVP_X_STATE_LEN(cc->evp); memcpy(EVP_X_STATE(cc->evp), dat, plen); } +#endif } diff --git a/cipher.h b/cipher.h index 3dd2270..06d4be4 100644 --- a/cipher.h +++ b/cipher.h @@ -1,4 +1,4 @@ -/* $OpenBSD: cipher.h,v 1.37 2009/01/26 09:58:15 markus Exp $ */ +/* $OpenBSD: cipher.h,v 1.48 2015/07/08 19:09:25 markus Exp $ */ /* * Author: Tatu Ylonen @@ -37,7 +37,11 @@ #ifndef CIPHER_H #define CIPHER_H +#include #include +#include "cipher-chachapoly.h" +#include "cipher-aesctr.h" + /* * Cipher types for SSH-1. New types can be added, but old types should not * be removed for compatibility. The maximum allowed value is 31. @@ -58,35 +62,44 @@ #define CIPHER_ENCRYPT 1 #define CIPHER_DECRYPT 0 -typedef struct Cipher Cipher; -typedef struct CipherContext CipherContext; - -struct Cipher; -struct CipherContext { +struct sshcipher; +struct sshcipher_ctx { int plaintext; + int encrypt; EVP_CIPHER_CTX evp; - Cipher *cipher; + struct chachapoly_ctx cp_ctx; /* XXX union with evp? */ + struct aesctr_ctx ac_ctx; /* XXX union with evp? */ + const struct sshcipher *cipher; }; u_int cipher_mask_ssh1(int); -Cipher *cipher_by_name(const char *); -Cipher *cipher_by_number(int); +const struct sshcipher *cipher_by_name(const char *); +const struct sshcipher *cipher_by_number(int); int cipher_number(const char *); char *cipher_name(int); +const char *cipher_warning_message(const struct sshcipher_ctx *); int ciphers_valid(const char *); -void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, - const u_char *, u_int, int); -void cipher_crypt(CipherContext *, u_char *, const u_char *, u_int); -void cipher_cleanup(CipherContext *); -void cipher_set_key_string(CipherContext *, Cipher *, const char *, int); -u_int cipher_blocksize(const Cipher *); -u_int cipher_keylen(const Cipher *); -u_int cipher_is_cbc(const Cipher *); +char *cipher_alg_list(char, int); +int cipher_init(struct sshcipher_ctx *, const struct sshcipher *, + const u_char *, u_int, const u_char *, u_int, int); +int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, + u_int, u_int, u_int); +int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, + const u_char *, u_int); +int cipher_cleanup(struct sshcipher_ctx *); +int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *, + const char *, int); +u_int cipher_blocksize(const struct sshcipher *); +u_int cipher_keylen(const struct sshcipher *); +u_int cipher_seclen(const struct sshcipher *); +u_int cipher_authlen(const struct sshcipher *); +u_int cipher_ivlen(const struct sshcipher *); +u_int cipher_is_cbc(const struct sshcipher *); -u_int cipher_get_number(const Cipher *); -void cipher_get_keyiv(CipherContext *, u_char *, u_int); -void cipher_set_keyiv(CipherContext *, u_char *); -int cipher_get_keyiv_len(const CipherContext *); -int cipher_get_keycontext(const CipherContext *, u_char *); -void cipher_set_keycontext(CipherContext *, u_char *); +u_int cipher_get_number(const struct sshcipher *); +int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int); +int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *); +int cipher_get_keyiv_len(const struct sshcipher_ctx *); +int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *); +void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *); #endif /* CIPHER_H */ diff --git a/clientloop.c b/clientloop.c index 173624b..eca508e 100644 --- a/clientloop.c +++ b/clientloop.c @@ -1,4 +1,4 @@ -/* $OpenBSD: clientloop.c,v 1.236 2011/06/22 22:08:42 djm Exp $ */ +/* $OpenBSD: clientloop.c,v 1.275 2015/07/10 06:21:53 markus Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -61,9 +61,9 @@ #include "includes.h" +#include /* MIN MAX */ #include #include -#include #ifdef HAVE_SYS_STAT_H # include #endif @@ -85,6 +85,7 @@ #include #include #include +#include #include "openbsd-compat/sys-queue.h" #include "xmalloc.h" @@ -99,17 +100,20 @@ #include "key.h" #include "cipher.h" #include "kex.h" +#include "myproposal.h" #include "log.h" +#include "misc.h" #include "readconf.h" #include "clientloop.h" #include "sshconnect.h" #include "authfd.h" #include "atomicio.h" #include "sshpty.h" -#include "misc.h" #include "match.h" #include "msg.h" #include "roaming.h" +#include "ssherr.h" +#include "hostfile.h" #ifdef WIN32_FIXME #include @@ -166,7 +170,7 @@ static int connection_in; /* Connection to server (input). */ static int connection_out; /* Connection to server (output). */ static int need_rekeying; /* Set to non-zero if rekeying is requested. */ static int session_closed; /* In SSH2: login session closed. */ -static int x11_refuse_time; /* If >0, refuse x11 opens after this time. */ +static u_int x11_refuse_time; /* If >0, refuse x11 opens after this time. */ static void client_init_dispatch(void); int session_ident = -1; @@ -197,9 +201,6 @@ TAILQ_HEAD(global_confirms, global_confirm); static struct global_confirms global_confirms = TAILQ_HEAD_INITIALIZER(global_confirms); -/*XXX*/ -extern Kex *xxx_kex; - void ssh_process_session2_setup(int, int, int, Buffer *); /* Restores stdin to blocking mode. */ @@ -281,7 +282,7 @@ set_control_persist_exit_time(void) control_persist_exit_time = 0; } else if (control_persist_exit_time <= 0) { /* a client connection has recently closed */ - control_persist_exit_time = time(NULL) + + control_persist_exit_time = monotime() + (time_t)options.control_persist_timeout; debug2("%s: schedule exit in %d seconds", __func__, options.control_persist_timeout); @@ -289,7 +290,25 @@ set_control_persist_exit_time(void) /* else we are already counting down to the timeout */ } -#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" +#define SSH_X11_VALID_DISPLAY_CHARS ":/.-_" +static int +client_x11_display_valid(const char *display) +{ + size_t i, dlen; + + dlen = strlen(display); + for (i = 0; i < dlen; i++) { + if (!isalnum((u_char)display[i]) && + strchr(SSH_X11_VALID_DISPLAY_CHARS, display[i]) == NULL) { + debug("Invalid character '%c' in DISPLAY", display[i]); + return 0; + } + } + return 1; +} + +#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" +#define X11_TIMEOUT_SLACK 60 void client_x11_get_proto(const char *display, const char *xauth_path, u_int trusted, u_int timeout, char **_proto, char **_data) @@ -302,7 +321,7 @@ client_x11_get_proto(const char *display, const char *xauth_path, int got_data = 0, generated = 0, do_unlink = 0, i; char *xauthdir, *xauthfile; struct stat st; - u_int now; + u_int now, x11_timeout_real; xauthdir = xauthfile = NULL; *_proto = proto; @@ -311,6 +330,9 @@ client_x11_get_proto(const char *display, const char *xauth_path, if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { debug("No xauth program."); + } else if (!client_x11_display_valid(display)) { + logit("DISPLAY '%s' invalid, falling back to fake xauth data", + display); } else { if (display == NULL) { debug("x11_get_proto: DISPLAY not set"); @@ -330,27 +352,39 @@ client_x11_get_proto(const char *display, const char *xauth_path, } if (trusted == 0) { #ifndef WIN32_FIXME - xauthdir = xmalloc(MAXPATHLEN); - xauthfile = xmalloc(MAXPATHLEN); - mktemp_proto(xauthdir, MAXPATHLEN); + xauthdir = xmalloc(PATH_MAX); + xauthfile = xmalloc(PATH_MAX); + mktemp_proto(xauthdir, PATH_MAX); + /* + * The authentication cookie should briefly outlive + * ssh's willingness to forward X11 connections to + * avoid nasty fail-open behaviour in the X server. + */ + if (timeout >= UINT_MAX - X11_TIMEOUT_SLACK) + x11_timeout_real = UINT_MAX; + else + x11_timeout_real = timeout + X11_TIMEOUT_SLACK; if (mkdtemp(xauthdir) != NULL) { do_unlink = 1; - snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", + snprintf(xauthfile, PATH_MAX, "%s/xauthfile", xauthdir); snprintf(cmd, sizeof(cmd), "%s -f %s generate %s " SSH_X11_PROTO " untrusted timeout %u 2>" _PATH_DEVNULL, - xauth_path, xauthfile, display, timeout); + xauth_path, xauthfile, display, + x11_timeout_real); debug2("x11_get_proto: %s", cmd); - if (system(cmd) == 0) - generated = 1; if (x11_refuse_time == 0) { - now = time(NULL) + 1; + now = monotime() + 1; if (UINT_MAX - timeout < now) x11_refuse_time = UINT_MAX; else x11_refuse_time = now + timeout; + channel_set_x11_refuse_time( + x11_refuse_time); } + if (system(cmd) == 0) + generated = 1; } #endif /* !WIN32_FIXME */ } @@ -385,10 +419,8 @@ client_x11_get_proto(const char *display, const char *xauth_path, unlink(xauthfile); rmdir(xauthdir); } - if (xauthdir) - xfree(xauthdir); - if (xauthfile) - xfree(xauthfile); + free(xauthdir); + free(xauthfile); /* * If we didn't get authentication data, just make up some @@ -534,22 +566,23 @@ client_check_window_change(void) #endif /* !WIN32_FIXME */ } -static void +static int client_global_request_reply(int type, u_int32_t seq, void *ctxt) { struct global_confirm *gc; if ((gc = TAILQ_FIRST(&global_confirms)) == NULL) - return; + return 0; if (gc->cb != NULL) gc->cb(type, seq, gc->ctx); if (--gc->ref_count <= 0) { TAILQ_REMOVE(&global_confirms, gc, entry); - bzero(gc, sizeof(*gc)); - xfree(gc); + explicit_bzero(gc, sizeof(*gc)); + free(gc); } packet_set_alive_timeouts(0); + return 0; } static void @@ -577,10 +610,12 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, { struct timeval tv, *tvp; int timeout_secs; + time_t minwait_secs = 0, server_alive_time = 0, now = monotime(); int ret; /* Add any selections by the channel mechanism. */ - channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); + channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, + &minwait_secs, rekeying); if (!compat20) { /* Read from the connection, unless our buffers are full. */ @@ -624,15 +659,21 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, */ timeout_secs = INT_MAX; /* we use INT_MAX to mean no timeout */ - if (options.server_alive_interval > 0 && compat20) + if (options.server_alive_interval > 0 && compat20) { timeout_secs = options.server_alive_interval; + server_alive_time = now + options.server_alive_interval; + } + if (options.rekey_interval > 0 && compat20 && !rekeying) + timeout_secs = MIN(timeout_secs, packet_get_rekey_timeout()); set_control_persist_exit_time(); if (control_persist_exit_time > 0) { timeout_secs = MIN(timeout_secs, - control_persist_exit_time - time(NULL)); + control_persist_exit_time - now); if (timeout_secs < 0) timeout_secs = 0; } + if (minwait_secs != 0) + timeout_secs = MIN(timeout_secs, (int)minwait_secs); if (timeout_secs == INT_MAX) tvp = NULL; else { @@ -659,8 +700,15 @@ client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); buffer_append(&stderr_buffer, buf, strlen(buf)); quit_pending = 1; - } else if (ret == 0) - server_alive_check(); + } else if (ret == 0) { + /* + * Timeout. Could have been either keepalive or rekeying. + * Keepalive we check here, rekeying is checked in clientloop. + */ + if (server_alive_time != 0 && server_alive_time <= monotime()) + server_alive_check(); + } + } static void @@ -807,20 +855,20 @@ client_status_confirm(int type, Channel *c, void *ctx) chan_write_failed(c); } } - xfree(cr); + free(cr); } static void client_abandon_status_confirm(Channel *c, void *ctx) { - xfree(ctx); + free(ctx); } void client_expect_confirm(int id, const char *request, enum confirm_action action) { - struct channel_reply_ctx *cr = xmalloc(sizeof(*cr)); + struct channel_reply_ctx *cr = xcalloc(1, sizeof(*cr)); cr->request_type = request; cr->action = action; @@ -843,7 +891,7 @@ client_register_global_confirm(global_confirm_cb *cb, void *ctx) return; } - gc = xmalloc(sizeof(*gc)); + gc = xcalloc(1, sizeof(*gc)); gc->cb = cb; gc->ctx = ctx; gc->ref_count = 1; @@ -854,23 +902,21 @@ static void process_cmdline(void) { void (*handler)(int); - char *s, *cmd, *cancel_host; - int delete = 0; - int local = 0, remote = 0, dynamic = 0; - int cancel_port; - Forward fwd; + char *s, *cmd; + int ok, delete = 0, local = 0, remote = 0, dynamic = 0; + struct Forward fwd; - bzero(&fwd, sizeof(fwd)); - fwd.listen_host = fwd.connect_host = NULL; + memset(&fwd, 0, sizeof(fwd)); leave_raw_mode(options.request_tty == REQUEST_TTY_FORCE); #ifndef WIN32_FIXME handler = signal(SIGINT, SIG_IGN); #endif + cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); if (s == NULL) goto out; - while (isspace(*s)) + while (isspace((u_char)*s)) s++; if (*s == '-') s++; /* Skip cmdline '-', if any */ @@ -885,8 +931,12 @@ process_cmdline(void) "Request remote forward"); logit(" -D[bind_address:]port " "Request dynamic forward"); + logit(" -KL[bind_address:]port " + "Cancel local forward"); logit(" -KR[bind_address:]port " "Cancel remote forward"); + logit(" -KD[bind_address:]port " + "Cancel dynamic forward"); if (!options.permit_local_command) goto out; logit(" !args " @@ -915,67 +965,120 @@ process_cmdline(void) goto out; } - if ((local || dynamic) && delete) { - logit("Not supported."); - goto out; - } - if (remote && delete && !compat20) { + if (delete && !compat20) { logit("Not supported for SSH protocol version 1."); goto out; } - while (isspace(*++s)) + while (isspace((u_char)*++s)) ; /* XXX update list of forwards in options */ if (delete) { - cancel_port = 0; - cancel_host = hpdelim(&s); /* may be NULL */ - if (s != NULL) { - cancel_port = a2port(s); - cancel_host = cleanhostname(cancel_host); - } else { - cancel_port = a2port(cancel_host); - cancel_host = NULL; - } - if (cancel_port <= 0) { - logit("Bad forwarding close port"); + /* We pass 1 for dynamicfwd to restrict to 1 or 2 fields. */ + if (!parse_forward(&fwd, s, 1, 0)) { + logit("Bad forwarding close specification."); goto out; } - channel_request_rforward_cancel(cancel_host, cancel_port); + if (remote) + ok = channel_request_rforward_cancel(&fwd) == 0; + else if (dynamic) + ok = channel_cancel_lport_listener(&fwd, + 0, &options.fwd_opts) > 0; + else + ok = channel_cancel_lport_listener(&fwd, + CHANNEL_CANCEL_PORT_STATIC, + &options.fwd_opts) > 0; + if (!ok) { + logit("Unkown port forwarding."); + goto out; + } + logit("Canceled forwarding."); } else { if (!parse_forward(&fwd, s, dynamic, remote)) { logit("Bad forwarding specification."); goto out; } if (local || dynamic) { - if (channel_setup_local_fwd_listener(fwd.listen_host, - fwd.listen_port, fwd.connect_host, - fwd.connect_port, options.gateway_ports) < 0) { + if (!channel_setup_local_fwd_listener(&fwd, + &options.fwd_opts)) { logit("Port forwarding failed."); goto out; } } else { - if (channel_request_remote_forwarding(fwd.listen_host, - fwd.listen_port, fwd.connect_host, - fwd.connect_port) < 0) { + if (channel_request_remote_forwarding(&fwd) < 0) { logit("Port forwarding failed."); goto out; } } - logit("Forwarding port."); } out: signal(SIGINT, handler); enter_raw_mode(options.request_tty == REQUEST_TTY_FORCE); - if (cmd) - xfree(cmd); - if (fwd.listen_host != NULL) - xfree(fwd.listen_host); - if (fwd.connect_host != NULL) - xfree(fwd.connect_host); + free(cmd); + free(fwd.listen_host); + free(fwd.listen_path); + free(fwd.connect_host); + free(fwd.connect_path); +} + +/* reasons to suppress output of an escape command in help output */ +#define SUPPRESS_NEVER 0 /* never suppress, always show */ +#define SUPPRESS_PROTO1 1 /* don't show in protocol 1 sessions */ +#define SUPPRESS_MUXCLIENT 2 /* don't show in mux client sessions */ +#define SUPPRESS_MUXMASTER 4 /* don't show in mux master sessions */ +#define SUPPRESS_SYSLOG 8 /* don't show when logging to syslog */ +struct escape_help_text { + const char *cmd; + const char *text; + unsigned int flags; +}; +static struct escape_help_text esc_txt[] = { + {".", "terminate session", SUPPRESS_MUXMASTER}, + {".", "terminate connection (and any multiplexed sessions)", + SUPPRESS_MUXCLIENT}, + {"B", "send a BREAK to the remote system", SUPPRESS_PROTO1}, + {"C", "open a command line", SUPPRESS_MUXCLIENT}, + {"R", "request rekey", SUPPRESS_PROTO1}, + {"V/v", "decrease/increase verbosity (LogLevel)", SUPPRESS_MUXCLIENT}, + {"^Z", "suspend ssh", SUPPRESS_MUXCLIENT}, + {"#", "list forwarded connections", SUPPRESS_NEVER}, + {"&", "background ssh (when waiting for connections to terminate)", + SUPPRESS_MUXCLIENT}, + {"?", "this message", SUPPRESS_NEVER}, +}; + +static void +print_escape_help(Buffer *b, int escape_char, int protocol2, int mux_client, + int using_stderr) +{ + unsigned int i, suppress_flags; + char string[1024]; + + snprintf(string, sizeof string, "%c?\r\n" + "Supported escape sequences:\r\n", escape_char); + buffer_append(b, string, strlen(string)); + + suppress_flags = (protocol2 ? 0 : SUPPRESS_PROTO1) | + (mux_client ? SUPPRESS_MUXCLIENT : 0) | + (mux_client ? 0 : SUPPRESS_MUXMASTER) | + (using_stderr ? 0 : SUPPRESS_SYSLOG); + + for (i = 0; i < sizeof(esc_txt)/sizeof(esc_txt[0]); i++) { + if (esc_txt[i].flags & suppress_flags) + continue; + snprintf(string, sizeof string, " %c%-3s - %s\r\n", + escape_char, esc_txt[i].cmd, esc_txt[i].text); + buffer_append(b, string, strlen(string)); + } + + snprintf(string, sizeof string, + " %c%c - send the escape character by typing it twice\r\n" + "(Note that escapes are only recognized immediately after " + "newline.)\r\n", escape_char, escape_char); + buffer_append(b, string, strlen(string)); } /* @@ -1028,6 +1131,11 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, if (c && c->ctl_chan != -1) { chan_read_failed(c); chan_write_failed(c); + if (c->detach_user) + c->detach_user(c->self, NULL); + c->type = SSH_CHANNEL_ABANDONED; + buffer_clear(&c->input); + chan_ibuf_empty(c); return 0; } else quit_pending = 1; @@ -1036,11 +1144,16 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, case 'Z' - 64: /* XXX support this for mux clients */ if (c && c->ctl_chan != -1) { + char b[16]; noescape: + if (ch == 'Z' - 64) + snprintf(b, sizeof b, "^Z"); + else + snprintf(b, sizeof b, "%c", ch); snprintf(string, sizeof string, - "%c%c escape not available to " + "%c%s escape not available to " "multiplexed sessions\r\n", - escape_char, ch); + escape_char, b); buffer_append(berr, string, strlen(string)); continue; @@ -1062,7 +1175,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, "%cB\r\n", escape_char); buffer_append(berr, string, strlen(string)); - channel_request_start(session_ident, + channel_request_start(c->self, "break", 0); packet_put_int(1000); packet_send(); @@ -1079,6 +1192,31 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, } continue; + case 'V': + /* FALLTHROUGH */ + case 'v': + if (c && c->ctl_chan != -1) + goto noescape; + if (!log_is_on_stderr()) { + snprintf(string, sizeof string, + "%c%c [Logging to syslog]\r\n", + escape_char, ch); + buffer_append(berr, string, + strlen(string)); + continue; + } + if (ch == 'V' && options.log_level > + SYSLOG_LEVEL_QUIET) + log_change_level(--options.log_level); + if (ch == 'v' && options.log_level < + SYSLOG_LEVEL_DEBUG3) + log_change_level(++options.log_level); + snprintf(string, sizeof string, + "%c%c [LogLevel %s]\r\n", escape_char, ch, + log_level_name(options.log_level)); + buffer_append(berr, string, strlen(string)); + continue; + #ifndef WIN32_FIXME case '&': if (c && c->ctl_chan != -1) @@ -1134,43 +1272,9 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, #endif /* !WIN32_FIXME */ case '?': - if (c && c->ctl_chan != -1) { - snprintf(string, sizeof string, -"%c?\r\n\ -Supported escape sequences:\r\n\ - %c. - terminate session\r\n\ - %cB - send a BREAK to the remote system\r\n\ - %cR - Request rekey (SSH protocol 2 only)\r\n\ - %c# - list forwarded connections\r\n\ - %c? - this message\r\n\ - %c%c - send the escape character by typing it twice\r\n\ -(Note that escapes are only recognized immediately after newline.)\r\n", - escape_char, escape_char, - escape_char, escape_char, - escape_char, escape_char, - escape_char, escape_char); - } else { - snprintf(string, sizeof string, -"%c?\r\n\ -Supported escape sequences:\r\n\ - %c. - terminate connection (and any multiplexed sessions)\r\n\ - %cB - send a BREAK to the remote system\r\n\ - %cC - open a command line\r\n\ - %cR - Request rekey (SSH protocol 2 only)\r\n\ - %c^Z - suspend ssh\r\n\ - %c# - list forwarded connections\r\n\ - %c& - background ssh (when waiting for connections to terminate)\r\n\ - %c? - this message\r\n\ - %c%c - send the escape character by typing it twice\r\n\ -(Note that escapes are only recognized immediately after newline.)\r\n", - escape_char, escape_char, - escape_char, escape_char, - escape_char, escape_char, - escape_char, escape_char, - escape_char, escape_char, - escape_char); - } - buffer_append(berr, string, strlen(string)); + print_escape_help(berr, escape_char, compat20, + (c && c->ctl_chan != -1), + log_is_on_stderr()); continue; case '#': @@ -1179,7 +1283,7 @@ Supported escape sequences:\r\n\ buffer_append(berr, string, strlen(string)); s = channel_open_message(); buffer_append(berr, s, strlen(s)); - xfree(s); + free(s); continue; case 'C': @@ -1346,8 +1450,7 @@ client_process_output(fd_set *writeset) static void client_process_buffered_input_packets(void) { - dispatch_run(DISPATCH_NONBLOCK, &quit_pending, - compat20 ? xxx_kex : NULL); + dispatch_run(DISPATCH_NONBLOCK, &quit_pending, active_state); } /* scan buf[] for '~' before sending data to the peer */ @@ -1358,7 +1461,7 @@ client_new_escape_filter_ctx(int escape_char) { struct escape_filter_ctx *ret; - ret = xmalloc(sizeof(*ret)); + ret = xcalloc(1, sizeof(*ret)); ret->escape_pending = 0; ret->escape_char = escape_char; return (void *)ret; @@ -1368,7 +1471,7 @@ client_new_escape_filter_ctx(int escape_char) void client_filter_cleanup(int cid, void *ctx) { - xfree(ctx); + free(ctx); } int @@ -1401,7 +1504,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) { fd_set *readset = NULL, *writeset = NULL; double start_time, total_time; - int max_fd = 0, max_fd2 = 0, len, rekeying = 0; + int r, max_fd = 0, max_fd2 = 0, len, rekeying = 0; u_int64_t ibytes, obytes; u_int nalloc = 0; char buf[100]; @@ -1446,6 +1549,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) * Set signal handlers, (e.g. to restore non-blocking mode) * but don't overwrite SIG_IGN, matches behaviour from rsh(1) */ + #ifndef WIN32_FIXME if (signal(SIGHUP, SIG_IGN) != SIG_IGN) signal(SIGHUP, signal_handler); @@ -1488,7 +1592,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) if (compat20 && session_closed && !channel_still_open()) break; - rekeying = (xxx_kex != NULL && !xxx_kex->done); + rekeying = (active_state->kex != NULL && !active_state->kex->done); if (rekeying) { debug("rekeying in progress"); @@ -1532,8 +1636,10 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) channel_after_select(readset, writeset); if (need_rekeying || packet_need_rekeying()) { debug("need rekeying"); - xxx_kex->done = 0; - kex_send_kexinit(xxx_kex); + active_state->kex->done = 0; + if ((r = kex_send_kexinit(active_state)) != 0) + fatal("%s: kex_send_kexinit: %s", + __func__, ssh_err(r)); need_rekeying = 0; } } @@ -1575,16 +1681,14 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) * connections, then quit. */ if (control_persist_exit_time > 0) { - if (time(NULL) >= control_persist_exit_time) { + if (monotime() >= control_persist_exit_time) { debug("ControlPersist timeout expired"); break; } } } - if (readset) - xfree(readset); - if (writeset) - xfree(writeset); + free(readset); + free(writeset); /* Terminate the session. */ @@ -1666,8 +1770,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) /* Report bytes transferred, and transfer rates. */ total_time = get_current_time() - start_time; - packet_get_state(MODE_IN, NULL, NULL, NULL, &ibytes); - packet_get_state(MODE_OUT, NULL, NULL, NULL, &obytes); + packet_get_bytes(&ibytes, &obytes); verbose("Transferred: sent %llu, received %llu bytes, in %.1f seconds", (unsigned long long)obytes, (unsigned long long)ibytes, total_time); if (total_time > 0) @@ -1680,27 +1783,29 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) /*********/ -static void +static int client_input_stdout_data(int type, u_int32_t seq, void *ctxt) { u_int data_len; char *data = packet_get_string(&data_len); packet_check_eom(); buffer_append(&stdout_buffer, data, data_len); - memset(data, 0, data_len); - xfree(data); + explicit_bzero(data, data_len); + free(data); + return 0; } -static void +static int client_input_stderr_data(int type, u_int32_t seq, void *ctxt) { u_int data_len; char *data = packet_get_string(&data_len); packet_check_eom(); buffer_append(&stderr_buffer, data, data_len); - memset(data, 0, data_len); - xfree(data); + explicit_bzero(data, data_len); + free(data); + return 0; } -static void +static int client_input_exit_status(int type, u_int32_t seq, void *ctxt) { exit_status = packet_get_int(); @@ -1715,12 +1820,14 @@ client_input_exit_status(int type, u_int32_t seq, void *ctxt) packet_write_wait(); /* Flag that we want to exit. */ quit_pending = 1; + return 0; } -static void + +static int client_input_agent_open(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; - int remote_id, sock; + int r, remote_id, sock; /* Read the remote channel number from the message. */ remote_id = packet_get_int(); @@ -1730,7 +1837,11 @@ client_input_agent_open(int type, u_int32_t seq, void *ctxt) * Get a connection to the local authentication agent (this may again * get forwarded). */ - sock = ssh_get_authentication_socket(); + if ((r = ssh_get_authentication_socket(&sock)) != 0 && + r != SSH_ERR_AGENT_NOT_PRESENT) + debug("%s: ssh_get_authentication_socket: %s", + __func__, ssh_err(r)); + /* * If we could not connect the agent, send an error message back to @@ -1755,6 +1866,7 @@ client_input_agent_open(int type, u_int32_t seq, void *ctxt) packet_put_int(c->self); } packet_send(); + return 0; } static Channel * @@ -1771,15 +1883,35 @@ client_request_forwarded_tcpip(const char *request_type, int rchan) originator_port = packet_get_int(); packet_check_eom(); - debug("client_request_forwarded_tcpip: listen %s port %d, " - "originator %s port %d", listen_address, listen_port, - originator_address, originator_port); + debug("%s: listen %s port %d, originator %s port %d", __func__, + listen_address, listen_port, originator_address, originator_port); - c = channel_connect_by_listen_address(listen_port, + c = channel_connect_by_listen_address(listen_address, listen_port, "forwarded-tcpip", originator_address); - xfree(originator_address); - xfree(listen_address); + free(originator_address); + free(listen_address); + return c; +} + +static Channel * +client_request_forwarded_streamlocal(const char *request_type, int rchan) +{ + Channel *c = NULL; + char *listen_path; + + /* Get the remote path. */ + listen_path = packet_get_string(NULL); + /* XXX: Skip reserved field for now. */ + if (packet_get_string_ptr(NULL) == NULL) + fatal("%s: packet_get_string_ptr failed", __func__); + packet_check_eom(); + + debug("%s: %s", __func__, listen_path); + + c = channel_connect_by_listen_path(listen_path, + "forwarded-streamlocal@openssh.com", "forwarded-streamlocal"); + free(listen_path); return c; } @@ -1797,7 +1929,7 @@ client_request_x11(const char *request_type, int rchan) "malicious server."); return NULL; } - if (x11_refuse_time != 0 && time(NULL) >= x11_refuse_time) { + if (x11_refuse_time != 0 && (u_int)monotime() >= x11_refuse_time) { verbose("Rejected X11 connection after ForwardX11Timeout " "expired"); return NULL; @@ -1813,7 +1945,7 @@ client_request_x11(const char *request_type, int rchan) /* XXX check permission */ debug("client_request_x11: request from %s %d", originator, originator_port); - xfree(originator); + free(originator); sock = x11_connect_display(); if (sock < 0) return NULL; @@ -1828,7 +1960,7 @@ static Channel * client_request_agent(const char *request_type, int rchan) { Channel *c = NULL; - int sock; + int r, sock; if (!options.forward_agent) { error("Warning: ssh server tried agent forwarding."); @@ -1836,9 +1968,12 @@ client_request_agent(const char *request_type, int rchan) "malicious server."); return NULL; } - sock = ssh_get_authentication_socket(); - if (sock < 0) + if ((r = ssh_get_authentication_socket(&sock)) != 0) { + if (r != SSH_ERR_AGENT_NOT_PRESENT) + debug("%s: ssh_get_authentication_socket: %s", + __func__, ssh_err(r)); return NULL; + } c = channel_new("authentication agent connection", SSH_CHANNEL_OPEN, sock, sock, -1, CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, @@ -1892,7 +2027,7 @@ client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun) } /* XXXX move to generic input handler */ -static void +static int client_input_channel_open(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; @@ -1910,6 +2045,8 @@ client_input_channel_open(int type, u_int32_t seq, void *ctxt) if (strcmp(ctype, "forwarded-tcpip") == 0) { c = client_request_forwarded_tcpip(ctype, rchan); + } else if (strcmp(ctype, "forwarded-streamlocal@openssh.com") == 0) { + c = client_request_forwarded_streamlocal(ctype, rchan); } else if (strcmp(ctype, "x11") == 0) { c = client_request_x11(ctype, rchan); } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { @@ -1940,9 +2077,11 @@ client_input_channel_open(int type, u_int32_t seq, void *ctxt) } packet_send(); } - xfree(ctype); + free(ctype); + return 0; } -static void + +static int client_input_channel_req(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; @@ -1980,32 +2119,410 @@ client_input_channel_req(int type, u_int32_t seq, void *ctxt) } packet_check_eom(); } - if (reply && c != NULL) { + if (reply && c != NULL && !(c->flags & CHAN_CLOSE_SENT)) { packet_start(success ? SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); packet_put_int(c->remote_id); packet_send(); } - xfree(rtype); + free(rtype); + return 0; } + +struct hostkeys_update_ctx { + /* The hostname and (optionally) IP address string for the server */ + char *host_str, *ip_str; + + /* + * Keys received from the server and a flag for each indicating + * whether they already exist in known_hosts. + * keys_seen is filled in by hostkeys_find() and later (for new + * keys) by client_global_hostkeys_private_confirm(). + */ + struct sshkey **keys; + int *keys_seen; + size_t nkeys; + + size_t nnew; + + /* + * Keys that are in known_hosts, but were not present in the update + * from the server (i.e. scheduled to be deleted). + * Filled in by hostkeys_find(). + */ + struct sshkey **old_keys; + size_t nold; +}; + static void +hostkeys_update_ctx_free(struct hostkeys_update_ctx *ctx) +{ + size_t i; + + if (ctx == NULL) + return; + for (i = 0; i < ctx->nkeys; i++) + sshkey_free(ctx->keys[i]); + free(ctx->keys); + free(ctx->keys_seen); + for (i = 0; i < ctx->nold; i++) + sshkey_free(ctx->old_keys[i]); + free(ctx->old_keys); + free(ctx->host_str); + free(ctx->ip_str); + free(ctx); +} + +static int +hostkeys_find(struct hostkey_foreach_line *l, void *_ctx) +{ + struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx; + size_t i; + struct sshkey **tmp; + + if (l->status != HKF_STATUS_MATCHED || l->key == NULL || + l->key->type == KEY_RSA1) + return 0; + + /* Mark off keys we've already seen for this host */ + for (i = 0; i < ctx->nkeys; i++) { + if (sshkey_equal(l->key, ctx->keys[i])) { + debug3("%s: found %s key at %s:%ld", __func__, + sshkey_ssh_name(ctx->keys[i]), l->path, l->linenum); + ctx->keys_seen[i] = 1; + return 0; + } + } + /* This line contained a key that not offered by the server */ + debug3("%s: deprecated %s key at %s:%ld", __func__, + sshkey_ssh_name(l->key), l->path, l->linenum); + if ((tmp = reallocarray(ctx->old_keys, ctx->nold + 1, + sizeof(*ctx->old_keys))) == NULL) + fatal("%s: reallocarray failed nold = %zu", + __func__, ctx->nold); + ctx->old_keys = tmp; + ctx->old_keys[ctx->nold++] = l->key; + l->key = NULL; + + return 0; +} + +static void +update_known_hosts(struct hostkeys_update_ctx *ctx) +{ + int r, was_raw = 0; + int loglevel = options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK ? + SYSLOG_LEVEL_INFO : SYSLOG_LEVEL_VERBOSE; + char *fp, *response; + size_t i; + + for (i = 0; i < ctx->nkeys; i++) { + if (ctx->keys_seen[i] != 2) + continue; + if ((fp = sshkey_fingerprint(ctx->keys[i], + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + fatal("%s: sshkey_fingerprint failed", __func__); + do_log2(loglevel, "Learned new hostkey: %s %s", + sshkey_type(ctx->keys[i]), fp); + free(fp); + } + for (i = 0; i < ctx->nold; i++) { + if ((fp = sshkey_fingerprint(ctx->old_keys[i], + options.fingerprint_hash, SSH_FP_DEFAULT)) == NULL) + fatal("%s: sshkey_fingerprint failed", __func__); + do_log2(loglevel, "Deprecating obsolete hostkey: %s %s", + sshkey_type(ctx->old_keys[i]), fp); + free(fp); + } + if (options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK) { + if (get_saved_tio() != NULL) { + leave_raw_mode(1); + was_raw = 1; + } + response = NULL; + for (i = 0; !quit_pending && i < 3; i++) { + free(response); + response = read_passphrase("Accept updated hostkeys? " + "(yes/no): ", RP_ECHO); + if (strcasecmp(response, "yes") == 0) + break; + else if (quit_pending || response == NULL || + strcasecmp(response, "no") == 0) { + options.update_hostkeys = 0; + break; + } else { + do_log2(loglevel, "Please enter " + "\"yes\" or \"no\""); + } + } + if (quit_pending || i >= 3 || response == NULL) + options.update_hostkeys = 0; + free(response); + if (was_raw) + enter_raw_mode(1); + } + + /* + * Now that all the keys are verified, we can go ahead and replace + * them in known_hosts (assuming SSH_UPDATE_HOSTKEYS_ASK didn't + * cancel the operation). + */ + if (options.update_hostkeys != 0 && + (r = hostfile_replace_entries(options.user_hostfiles[0], + ctx->host_str, ctx->ip_str, ctx->keys, ctx->nkeys, + options.hash_known_hosts, 0, + options.fingerprint_hash)) != 0) + error("%s: hostfile_replace_entries failed: %s", + __func__, ssh_err(r)); +} + +static void +client_global_hostkeys_private_confirm(int type, u_int32_t seq, void *_ctx) +{ + struct ssh *ssh = active_state; /* XXX */ + struct hostkeys_update_ctx *ctx = (struct hostkeys_update_ctx *)_ctx; + size_t i, ndone; + struct sshbuf *signdata; + int r; + const u_char *sig; + size_t siglen; + + if (ctx->nnew == 0) + fatal("%s: ctx->nnew == 0", __func__); /* sanity */ + if (type != SSH2_MSG_REQUEST_SUCCESS) { + error("Server failed to confirm ownership of " + "private host keys"); + hostkeys_update_ctx_free(ctx); + return; + } + if ((signdata = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + /* Don't want to accidentally accept an unbound signature */ + if (ssh->kex->session_id_len == 0) + fatal("%s: ssh->kex->session_id_len == 0", __func__); + /* + * Expect a signature for each of the ctx->nnew private keys we + * haven't seen before. They will be in the same order as the + * ctx->keys where the corresponding ctx->keys_seen[i] == 0. + */ + for (ndone = i = 0; i < ctx->nkeys; i++) { + if (ctx->keys_seen[i]) + continue; + /* Prepare data to be signed: session ID, unique string, key */ + sshbuf_reset(signdata); + if ( (r = sshbuf_put_cstring(signdata, + "hostkeys-prove-00@openssh.com")) != 0 || + (r = sshbuf_put_string(signdata, ssh->kex->session_id, + ssh->kex->session_id_len)) != 0 || + (r = sshkey_puts(ctx->keys[i], signdata)) != 0) + fatal("%s: failed to prepare signature: %s", + __func__, ssh_err(r)); + /* Extract and verify signature */ + if ((r = sshpkt_get_string_direct(ssh, &sig, &siglen)) != 0) { + error("%s: couldn't parse message: %s", + __func__, ssh_err(r)); + goto out; + } + if ((r = sshkey_verify(ctx->keys[i], sig, siglen, + sshbuf_ptr(signdata), sshbuf_len(signdata), 0)) != 0) { + error("%s: server gave bad signature for %s key %zu", + __func__, sshkey_type(ctx->keys[i]), i); + goto out; + } + /* Key is good. Mark it as 'seen' */ + ctx->keys_seen[i] = 2; + ndone++; + } + if (ndone != ctx->nnew) + fatal("%s: ndone != ctx->nnew (%zu / %zu)", __func__, + ndone, ctx->nnew); /* Shouldn't happen */ + ssh_packet_check_eom(ssh); + + /* Make the edits to known_hosts */ + update_known_hosts(ctx); + out: + hostkeys_update_ctx_free(ctx); +} + +/* + * Handle hostkeys-00@openssh.com global request to inform the client of all + * the server's hostkeys. The keys are checked against the user's + * HostkeyAlgorithms preference before they are accepted. + */ +static int +client_input_hostkeys(void) +{ + struct ssh *ssh = active_state; /* XXX */ + const u_char *blob = NULL; + size_t i, len = 0; + struct sshbuf *buf = NULL; + struct sshkey *key = NULL, **tmp; + int r; + char *fp; + static int hostkeys_seen = 0; /* XXX use struct ssh */ + extern struct sockaddr_storage hostaddr; /* XXX from ssh.c */ + struct hostkeys_update_ctx *ctx = NULL; + + if (hostkeys_seen) + fatal("%s: server already sent hostkeys", __func__); + if (options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK && + options.batch_mode) + return 1; /* won't ask in batchmode, so don't even try */ + if (!options.update_hostkeys || options.num_user_hostfiles <= 0) + return 1; + + ctx = xcalloc(1, sizeof(*ctx)); + while (ssh_packet_remaining(ssh) > 0) { + sshkey_free(key); + key = NULL; + if ((r = sshpkt_get_string_direct(ssh, &blob, &len)) != 0) { + error("%s: couldn't parse message: %s", + __func__, ssh_err(r)); + goto out; + } + if ((r = sshkey_from_blob(blob, len, &key)) != 0) { + error("%s: parse key: %s", __func__, ssh_err(r)); + goto out; + } + fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT); + debug3("%s: received %s key %s", __func__, + sshkey_type(key), fp); + free(fp); + + /* Check that the key is accepted in HostkeyAlgorithms */ + if (match_pattern_list(sshkey_ssh_name(key), + options.hostkeyalgorithms ? options.hostkeyalgorithms : + KEX_DEFAULT_PK_ALG, 0) != 1) { + debug3("%s: %s key not permitted by HostkeyAlgorithms", + __func__, sshkey_ssh_name(key)); + continue; + } + /* Skip certs */ + if (sshkey_is_cert(key)) { + debug3("%s: %s key is a certificate; skipping", + __func__, sshkey_ssh_name(key)); + continue; + } + /* Ensure keys are unique */ + for (i = 0; i < ctx->nkeys; i++) { + if (sshkey_equal(key, ctx->keys[i])) { + error("%s: received duplicated %s host key", + __func__, sshkey_ssh_name(key)); + goto out; + } + } + /* Key is good, record it */ + if ((tmp = reallocarray(ctx->keys, ctx->nkeys + 1, + sizeof(*ctx->keys))) == NULL) + fatal("%s: reallocarray failed nkeys = %zu", + __func__, ctx->nkeys); + ctx->keys = tmp; + ctx->keys[ctx->nkeys++] = key; + key = NULL; + } + + if (ctx->nkeys == 0) { + debug("%s: server sent no hostkeys", __func__); + goto out; + } + + if ((ctx->keys_seen = calloc(ctx->nkeys, + sizeof(*ctx->keys_seen))) == NULL) + fatal("%s: calloc failed", __func__); + + get_hostfile_hostname_ipaddr(host, + options.check_host_ip ? (struct sockaddr *)&hostaddr : NULL, + options.port, &ctx->host_str, + options.check_host_ip ? &ctx->ip_str : NULL); + + /* Find which keys we already know about. */ + if ((r = hostkeys_foreach(options.user_hostfiles[0], hostkeys_find, + ctx, ctx->host_str, ctx->ip_str, + HKF_WANT_PARSE_KEY|HKF_WANT_MATCH)) != 0) { + error("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); + goto out; + } + + /* Figure out if we have any new keys to add */ + ctx->nnew = 0; + for (i = 0; i < ctx->nkeys; i++) { + if (!ctx->keys_seen[i]) + ctx->nnew++; + } + + debug3("%s: %zu keys from server: %zu new, %zu retained. %zu to remove", + __func__, ctx->nkeys, ctx->nnew, ctx->nkeys - ctx->nnew, ctx->nold); + + if (ctx->nnew == 0 && ctx->nold != 0) { + /* We have some keys to remove. Just do it. */ + update_known_hosts(ctx); + } else if (ctx->nnew != 0) { + /* + * We have received hitherto-unseen keys from the server. + * Ask the server to confirm ownership of the private halves. + */ + debug3("%s: asking server to prove ownership for %zu keys", + __func__, ctx->nnew); + if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 || + (r = sshpkt_put_cstring(ssh, + "hostkeys-prove-00@openssh.com")) != 0 || + (r = sshpkt_put_u8(ssh, 1)) != 0) /* bool: want reply */ + fatal("%s: cannot prepare packet: %s", + __func__, ssh_err(r)); + if ((buf = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new", __func__); + for (i = 0; i < ctx->nkeys; i++) { + if (ctx->keys_seen[i]) + continue; + sshbuf_reset(buf); + if ((r = sshkey_putb(ctx->keys[i], buf)) != 0) + fatal("%s: sshkey_putb: %s", + __func__, ssh_err(r)); + if ((r = sshpkt_put_stringb(ssh, buf)) != 0) + fatal("%s: sshpkt_put_string: %s", + __func__, ssh_err(r)); + } + if ((r = sshpkt_send(ssh)) != 0) + fatal("%s: sshpkt_send: %s", __func__, ssh_err(r)); + client_register_global_confirm( + client_global_hostkeys_private_confirm, ctx); + ctx = NULL; /* will be freed in callback */ + } + + /* Success */ + out: + hostkeys_update_ctx_free(ctx); + sshkey_free(key); + sshbuf_free(buf); + /* + * NB. Return success for all cases. The server doesn't need to know + * what the client does with its hosts file. + */ + return 1; +} + +static int client_input_global_request(int type, u_int32_t seq, void *ctxt) { char *rtype; int want_reply; int success = 0; - rtype = packet_get_string(NULL); + rtype = packet_get_cstring(NULL); want_reply = packet_get_char(); debug("client_input_global_request: rtype %s want_reply %d", rtype, want_reply); + if (strcmp(rtype, "hostkeys-00@openssh.com") == 0) + success = client_input_hostkeys(); if (want_reply) { packet_start(success ? SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); packet_send(); packet_write_wait(); } - xfree(rtype); + free(rtype); + return 0; } void @@ -2044,6 +2561,7 @@ client_session2_setup(int id, int want_tty, int want_subsystem, if (tiop == NULL) tiop = get_saved_tio(); tty_make_modes(-1, tiop); + #else packet_put_int((u_int) 80 /*ws.ws_col*/); packet_put_int((u_int) 25 /*ws.ws_row*/); @@ -2051,7 +2569,6 @@ client_session2_setup(int id, int want_tty, int want_subsystem, packet_put_int((u_int) 480 /*ws.ws_ypixel*/); tty_make_modes(-1, NULL); #endif /* else !WIN32_FIXME */ - packet_send(); /* XXX wait for reply */ c->client_tty = 1; @@ -2067,7 +2584,7 @@ client_session2_setup(int id, int want_tty, int want_subsystem, /* Split */ name = xstrdup(env[i]); if ((val = strchr(name, '=')) == NULL) { - xfree(name); + free(name); continue; } *val++ = '\0'; @@ -2081,7 +2598,7 @@ client_session2_setup(int id, int want_tty, int want_subsystem, } if (!matched) { debug3("Ignored env %s", name); - xfree(name); + free(name); continue; } @@ -2090,7 +2607,7 @@ client_session2_setup(int id, int want_tty, int want_subsystem, packet_put_cstring(name); packet_put_cstring(val); packet_send(); - xfree(name); + free(name); } } @@ -2189,10 +2706,10 @@ client_stop_mux(void) if (options.control_path != NULL && muxserver_sock != -1) unlink(options.control_path); /* - * If we are in persist mode, signal that we should close when all - * active channels are closed. + * If we are in persist mode, or don't have a shell, signal that we + * should close when all active channels are closed. */ - if (options.control_persist) { + if (options.control_persist || no_shell_flag) { session_closed = 1; setproctitle("[stopped mux]"); } diff --git a/clientloop.h b/clientloop.h index a259b5e..338d451 100644 --- a/clientloop.h +++ b/clientloop.h @@ -1,4 +1,4 @@ -/* $OpenBSD: clientloop.h,v 1.28 2011/06/22 22:08:42 djm Exp $ */ +/* $OpenBSD: clientloop.h,v 1.31 2013/06/02 23:36:29 dtucker Exp $ */ /* * Author: Tatu Ylonen @@ -70,6 +70,7 @@ void client_expect_confirm(int, const char *, enum confirm_action); #define SSHMUX_COMMAND_STDIO_FWD 4 /* Open stdio fwd (ssh -W) */ #define SSHMUX_COMMAND_FORWARD 5 /* Forward only, no command */ #define SSHMUX_COMMAND_STOP 6 /* Disable mux but not conn */ +#define SSHMUX_COMMAND_CANCEL_FWD 7 /* Cancel forwarding(s) */ void muxserver_listen(void); void muxclient(const char *); diff --git a/compat.c b/compat.c index df3541d..5583804 100644 --- a/compat.c +++ b/compat.c @@ -1,4 +1,4 @@ -/* $OpenBSD: compat.c,v 1.78 2008/09/11 14:22:37 markus Exp $ */ +/* $OpenBSD: compat.c,v 1.97 2015/08/19 23:21:42 djm Exp $ */ /* * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved. * @@ -45,6 +45,8 @@ int datafellows = 0; void enable_compat20(void) { + if (compat20) + return; debug("Enabling compatibility mode for protocol 2.0"); compat20 = 1; } @@ -55,7 +57,7 @@ enable_compat13(void) compat13 = 1; } /* datafellows bug compatibility */ -void +u_int compat_datafellows(const char *version) { int i; @@ -92,6 +94,10 @@ compat_datafellows(const char *version) { "OpenSSH_3.*", SSH_OLD_FORWARD_ADDR }, { "Sun_SSH_1.0*", SSH_BUG_NOREKEY|SSH_BUG_EXTEOF}, { "OpenSSH_4*", 0 }, + { "OpenSSH_5*", SSH_NEW_OPENSSH|SSH_BUG_DYNAMIC_RPORT}, + { "OpenSSH_6.6.1*", SSH_NEW_OPENSSH}, + { "OpenSSH_6.5*," + "OpenSSH_6.6*", SSH_NEW_OPENSSH|SSH_BUG_CURVE25519PAD}, { "OpenSSH*", SSH_NEW_OPENSSH }, { "*MindTerm*", 0 }, { "2.1.0*", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| @@ -146,6 +152,8 @@ compat_datafellows(const char *version) "1.2.22*", SSH_BUG_IGNOREMSG }, { "1.3.2*", /* F-Secure */ SSH_BUG_IGNOREMSG }, + { "Cisco-1.*", SSH_BUG_DHGEX_LARGE| + SSH_BUG_HOSTKEYS }, { "*SSH Compatible Server*", /* Netscreen */ SSH_BUG_PASSWORDPAD }, { "*OSU_0*," @@ -159,21 +167,54 @@ compat_datafellows(const char *version) "OSU_1.5alpha3*", SSH_BUG_PASSWORDPAD }, { "*SSH_Version_Mapper*", SSH_BUG_SCANNER }, + { "PuTTY_Local:*," /* dev versions < Sep 2014 */ + "PuTTY-Release-0.5*," /* 0.50-0.57, DH-GEX in >=0.52 */ + "PuTTY_Release_0.5*," /* 0.58-0.59 */ + "PuTTY_Release_0.60*," + "PuTTY_Release_0.61*," + "PuTTY_Release_0.62*," + "PuTTY_Release_0.63*," + "PuTTY_Release_0.64*", + SSH_OLD_DHGEX }, + { "FuTTY*", SSH_OLD_DHGEX }, /* Putty Fork */ { "Probe-*", SSH_BUG_PROBE }, + { "TeraTerm SSH*," + "TTSSH/1.5.*," + "TTSSH/2.1*," + "TTSSH/2.2*," + "TTSSH/2.3*," + "TTSSH/2.4*," + "TTSSH/2.5*," + "TTSSH/2.6*," + "TTSSH/2.70*," + "TTSSH/2.71*," + "TTSSH/2.72*", SSH_BUG_HOSTKEYS }, + { "WinSCP_release_4*," + "WinSCP_release_5.0*," + "WinSCP_release_5.1*," + "WinSCP_release_5.5*," + "WinSCP_release_5.6*," + "WinSCP_release_5.7," + "WinSCP_release_5.7.1," + "WinSCP_release_5.7.2," + "WinSCP_release_5.7.3," + "WinSCP_release_5.7.4", + SSH_OLD_DHGEX }, { NULL, 0 } }; /* process table, return first match */ for (i = 0; check[i].pat; i++) { - if (match_pattern_list(version, check[i].pat, - strlen(check[i].pat), 0) == 1) { - debug("match: %s pat %s", version, check[i].pat); - datafellows = check[i].bugs; - return; + if (match_pattern_list(version, check[i].pat, 0) == 1) { + debug("match: %s pat %s compat 0x%08x", + version, check[i].pat, check[i].bugs); + datafellows = check[i].bugs; /* XXX for now */ + return check[i].bugs; } } debug("no match: %s", version); + return 0; } #define SEP "," @@ -185,13 +226,17 @@ proto_spec(const char *spec) if (spec == NULL) return ret; - q = s = xstrdup(spec); + q = s = strdup(spec); + if (s == NULL) + return ret; for ((p = strsep(&q, SEP)); p && *p != '\0'; (p = strsep(&q, SEP))) { switch (atoi(p)) { case 1: +#ifdef WITH_SSH1 if (ret == SSH_PROTO_UNKNOWN) ret |= SSH_PROTO_1_PREFERRED; ret |= SSH_PROTO_1; +#endif break; case 2: ret |= SSH_PROTO_2; @@ -201,37 +246,80 @@ proto_spec(const char *spec) break; } } - xfree(s); + free(s); return ret; } +/* + * Filters a proposal string, excluding any algorithm matching the 'filter' + * pattern list. + */ +static char * +filter_proposal(char *proposal, const char *filter) +{ + Buffer b; + char *orig_prop, *fix_prop; + char *cp, *tmp; + + buffer_init(&b); + tmp = orig_prop = xstrdup(proposal); + while ((cp = strsep(&tmp, ",")) != NULL) { + if (match_pattern_list(cp, filter, 0) != 1) { + if (buffer_len(&b) > 0) + buffer_append(&b, ",", 1); + buffer_append(&b, cp, strlen(cp)); + } else + debug2("Compat: skipping algorithm \"%s\"", cp); + } + buffer_append(&b, "\0", 1); + fix_prop = xstrdup((char *)buffer_ptr(&b)); + buffer_free(&b); + free(orig_prop); + + return fix_prop; +} + char * compat_cipher_proposal(char *cipher_prop) { - Buffer b; - char *orig_prop, *fix_ciphers; - char *cp, *tmp; - if (!(datafellows & SSH_BUG_BIGENDIANAES)) - return(cipher_prop); - - buffer_init(&b); - tmp = orig_prop = xstrdup(cipher_prop); - while ((cp = strsep(&tmp, ",")) != NULL) { - if (strncmp(cp, "aes", 3) != 0) { - if (buffer_len(&b) > 0) - buffer_append(&b, ",", 1); - buffer_append(&b, cp, strlen(cp)); - } - } - buffer_append(&b, "\0", 1); - fix_ciphers = xstrdup(buffer_ptr(&b)); - buffer_free(&b); - xfree(orig_prop); - debug2("Original cipher proposal: %s", cipher_prop); - debug2("Compat cipher proposal: %s", fix_ciphers); - if (!*fix_ciphers) - fatal("No available ciphers found."); - - return(fix_ciphers); + return cipher_prop; + debug2("%s: original cipher proposal: %s", __func__, cipher_prop); + cipher_prop = filter_proposal(cipher_prop, "aes*"); + debug2("%s: compat cipher proposal: %s", __func__, cipher_prop); + if (*cipher_prop == '\0') + fatal("No supported ciphers found"); + return cipher_prop; } + +char * +compat_pkalg_proposal(char *pkalg_prop) +{ + if (!(datafellows & SSH_BUG_RSASIGMD5)) + return pkalg_prop; + debug2("%s: original public key proposal: %s", __func__, pkalg_prop); + pkalg_prop = filter_proposal(pkalg_prop, "ssh-rsa"); + debug2("%s: compat public key proposal: %s", __func__, pkalg_prop); + if (*pkalg_prop == '\0') + fatal("No supported PK algorithms found"); + return pkalg_prop; +} + +char * +compat_kex_proposal(char *p) +{ + if ((datafellows & (SSH_BUG_CURVE25519PAD|SSH_OLD_DHGEX)) == 0) + return p; + debug2("%s: original KEX proposal: %s", __func__, p); + if ((datafellows & SSH_BUG_CURVE25519PAD) != 0) + p = filter_proposal(p, "curve25519-sha256@libssh.org"); + if ((datafellows & SSH_OLD_DHGEX) != 0) { + p = filter_proposal(p, "diffie-hellman-group-exchange-sha256"); + p = filter_proposal(p, "diffie-hellman-group-exchange-sha1"); + } + debug2("%s: compat KEX proposal: %s", __func__, p); + if (*p == '\0') + fatal("No supported key exchange algorithms found"); + return p; +} + diff --git a/compat.h b/compat.h index 16cf282..2be290a 100644 --- a/compat.h +++ b/compat.h @@ -1,4 +1,4 @@ -/* $OpenBSD: compat.h,v 1.42 2008/09/11 14:22:37 markus Exp $ */ +/* $OpenBSD: compat.h,v 1.48 2015/05/26 23:23:40 dtucker Exp $ */ /* * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. @@ -58,12 +58,18 @@ #define SSH_OLD_FORWARD_ADDR 0x01000000 #define SSH_BUG_RFWD_ADDR 0x02000000 #define SSH_NEW_OPENSSH 0x04000000 +#define SSH_BUG_DYNAMIC_RPORT 0x08000000 +#define SSH_BUG_CURVE25519PAD 0x10000000 +#define SSH_BUG_HOSTKEYS 0x20000000 +#define SSH_BUG_DHGEX_LARGE 0x40000000 void enable_compat13(void); void enable_compat20(void); -void compat_datafellows(const char *); +u_int compat_datafellows(const char *); int proto_spec(const char *); char *compat_cipher_proposal(char *); +char *compat_pkalg_proposal(char *); +char *compat_kex_proposal(char *); extern int compat13; extern int compat20; diff --git a/config.h b/config.h new file mode 100644 index 0000000..bff82d5 --- /dev/null +++ b/config.h @@ -0,0 +1,1644 @@ +/* config.h. Generated from config.h.in by configure. */ +/* config.h.in. Generated from configure.ac by autoheader. */ + +/* Define if building universal (internal helper macro) */ +/* #undef AC_APPLE_UNIVERSAL_BUILD */ + +/* Define if you have a getaddrinfo that fails for the all-zeros IPv6 address + */ +/* #undef AIX_GETNAMEINFO_HACK */ + +/* Define if your AIX loginfailed() function takes 4 arguments (AIX >= 5.2) + */ +/* #undef AIX_LOGINFAILED_4ARG */ + +/* System only supports IPv4 audit records */ +/* #undef AU_IPv4 */ + +/* Define if your resolver libs need this for getrrsetbyname */ +/* #undef BIND_8_COMPAT */ + +/* Define if cmsg_type is not passed correctly */ +/* #undef BROKEN_CMSG_TYPE */ + +/* getaddrinfo is broken (if present) */ +/* #undef BROKEN_GETADDRINFO */ + +/* getgroups(0,NULL) will return -1 */ +/* #undef BROKEN_GETGROUPS */ + +/* FreeBSD glob does not do what we need */ +/* #undef BROKEN_GLOB */ + +/* Define if you system's inet_ntoa is busted (e.g. Irix gcc issue) */ +/* #undef BROKEN_INET_NTOA */ + +/* ia_uinfo routines not supported by OS yet */ +/* #undef BROKEN_LIBIAF */ + +/* Ultrix mmap can't map files */ +/* #undef BROKEN_MMAP */ + +/* Define if your struct dirent expects you to allocate extra space for + d_name */ +/* #undef BROKEN_ONE_BYTE_DIRENT_D_NAME */ + +/* Can't do comparisons on readv */ +/* #undef BROKEN_READV_COMPARISON */ + +/* Define if you have a broken realpath. */ +/* #undef BROKEN_REALPATH */ + +/* Needed for NeXT */ +/* #undef BROKEN_SAVED_UIDS */ + +/* Define if your setregid() is broken */ +/* #undef BROKEN_SETREGID */ + +/* Define if your setresgid() is broken */ +/* #undef BROKEN_SETRESGID */ + +/* Define if your setresuid() is broken */ +/* #undef BROKEN_SETRESUID */ + +/* Define if your setreuid() is broken */ +/* #undef BROKEN_SETREUID */ + +/* LynxOS has broken setvbuf() implementation */ +/* #undef BROKEN_SETVBUF */ + +/* QNX shadow support is broken */ +/* #undef BROKEN_SHADOW_EXPIRE */ + +/* Define if your snprintf is busted */ +/* #undef BROKEN_SNPRINTF */ + +/* tcgetattr with ICANON may hang */ +/* #undef BROKEN_TCGETATTR_ICANON */ + +/* updwtmpx is broken (if present) */ +/* #undef BROKEN_UPDWTMPX */ + +/* Define if you have BSD auth support */ +/* #undef BSD_AUTH */ + +/* Define if you want to specify the path to your lastlog file */ +#define CONF_LASTLOG_FILE "/var/log/lastlog" + +/* Define if you want to specify the path to your utmp file */ +#define CONF_UTMP_FILE "/var/run/utmp" + +/* Define if you want to specify the path to your wtmpx file */ +/* #undef CONF_WTMPX_FILE */ + +/* Define if you want to specify the path to your wtmp file */ +/* #undef CONF_WTMP_FILE */ + +/* Define if your platform needs to skip post auth file descriptor passing */ +#define DISABLE_FD_PASSING 1 + +/* Define if you don't want to use lastlog */ +/* #undef DISABLE_LASTLOG */ + +/* Define if you don't want to use your system's login() call */ +/* #undef DISABLE_LOGIN */ + +/* Define if you don't want to use pututline() etc. to write [uw]tmp */ +/* #undef DISABLE_PUTUTLINE */ + +/* Define if you don't want to use pututxline() etc. to write [uw]tmpx */ +/* #undef DISABLE_PUTUTXLINE */ + +/* Define if you want to disable shadow passwords */ +#define DISABLE_SHADOW 1 + +/* Define if you don't want to use utmp */ +#define DISABLE_UTMP 1 + +/* Define if you don't want to use utmpx */ +#define DISABLE_UTMPX 1 + +/* Define if you don't want to use wtmp */ +#define DISABLE_WTMP 1 + +/* Define if you don't want to use wtmpx */ +#define DISABLE_WTMPX 1 + +/* Enable for PKCS#11 support */ +#define ENABLE_PKCS11 1 + +/* File names may not contain backslash characters */ +/* #undef FILESYSTEM_NO_BACKSLASH */ + +/* fsid_t has member val */ +/* #undef FSID_HAS_VAL */ + +/* fsid_t has member __val */ +/* #undef FSID_HAS___VAL */ + +/* Define to 1 if the `getpgrp' function requires zero arguments. */ +/* #undef GETPGRP_VOID */ + +/* Conflicting defs for getspnam */ +/* #undef GETSPNAM_CONFLICTING_DEFS */ + +/* Define if your system glob() function has the GLOB_ALTDIRFUNC extension */ +/* #undef GLOB_HAS_ALTDIRFUNC */ + +/* Define if your system glob() function has gl_matchc options in glob_t */ +#define GLOB_HAS_GL_MATCHC 1 + +/* Define if your system glob() function has gl_statv options in glob_t */ +#define GLOB_HAS_GL_STATV 1 + +/* Define this if you want GSSAPI support in the version 2 protocol */ +#define GSSAPI 1 + +/* Define if you want to use shadow password expire field */ +/* #undef HAS_SHADOW_EXPIRE */ + +/* Define if your system uses access rights style file descriptor passing */ +/* #undef HAVE_ACCRIGHTS_IN_MSGHDR */ + +/* Define if you have ut_addr in utmp.h */ +/* #undef HAVE_ADDR_IN_UTMP */ + +/* Define if you have ut_addr in utmpx.h */ +/* #undef HAVE_ADDR_IN_UTMPX */ + +/* Define if you have ut_addr_v6 in utmp.h */ +/* #undef HAVE_ADDR_V6_IN_UTMP */ + +/* Define if you have ut_addr_v6 in utmpx.h */ +/* #undef HAVE_ADDR_V6_IN_UTMPX */ + +/* Define to 1 if you have the `arc4random' function. */ +/* #undef HAVE_ARC4RANDOM */ + +/* Define to 1 if you have the `arc4random_buf' function. */ +/* #undef HAVE_ARC4RANDOM_BUF */ + +/* Define to 1 if you have the `arc4random_uniform' function. */ +/* #undef HAVE_ARC4RANDOM_UNIFORM */ + +/* Define to 1 if you have the `asprintf' function. */ +/* #undef HAVE_ASPRINTF */ + +/* OpenBSD's gcc has bounded */ +/* #undef HAVE_ATTRIBUTE__BOUNDED__ */ + +/* Have attribute nonnull */ +#define HAVE_ATTRIBUTE__NONNULL__ 1 + +/* OpenBSD's gcc has sentinel */ +/* #undef HAVE_ATTRIBUTE__SENTINEL__ */ + +/* Define to 1 if you have the `aug_get_machine' function. */ +/* #undef HAVE_AUG_GET_MACHINE */ + +/* Define to 1 if you have the `b64_ntop' function. */ +/* #undef HAVE_B64_NTOP */ + +/* Define to 1 if you have the `b64_pton' function. */ +/* #undef HAVE_B64_PTON */ + +/* Define if you have the basename function. */ +#define HAVE_BASENAME 1 + +/* Define to 1 if you have the `bcopy' function. */ +/* #undef HAVE_BCOPY */ + +/* Define to 1 if you have the `bindresvport_sa' function. */ +/* #undef HAVE_BINDRESVPORT_SA */ + +/* Define to 1 if you have the `BN_is_prime_ex' function. */ +#define HAVE_BN_IS_PRIME_EX 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_BSM_AUDIT_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_BSTRING_H */ + +/* Define to 1 if you have the `clock' function. */ +#define HAVE_CLOCK 1 + +/* define if you have clock_t data type */ +#define HAVE_CLOCK_T 1 + +/* Define to 1 if you have the `closefrom' function. */ +/* #undef HAVE_CLOSEFROM */ + +/* Define if gai_strerror() returns const char * */ +/* #undef HAVE_CONST_GAI_STRERROR_PROTO */ + +/* Define if your system uses ancillary data style file descriptor passing */ +/* #undef HAVE_CONTROL_IN_MSGHDR */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_CRYPTO_SHA2_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_CRYPT_H */ + +/* Define if you are on Cygwin */ +/* #undef HAVE_CYGWIN */ + +/* Define if your libraries define daemon() */ +/* #undef HAVE_DAEMON */ + +/* Define to 1 if you have the declaration of `authenticate', and to 0 if you + don't. */ +/* #undef HAVE_DECL_AUTHENTICATE */ + +/* Define to 1 if you have the declaration of `GLOB_NOMATCH', and to 0 if you + don't. */ +#define HAVE_DECL_GLOB_NOMATCH 1 + +/* Define to 1 if you have the declaration of `h_errno', and to 0 if you + don't. */ +#define HAVE_DECL_H_ERRNO 0 + +/* Define to 1 if you have the declaration of `loginfailed', and to 0 if you + don't. */ +/* #undef HAVE_DECL_LOGINFAILED */ + +/* Define to 1 if you have the declaration of `loginrestrictions', and to 0 if + you don't. */ +/* #undef HAVE_DECL_LOGINRESTRICTIONS */ + +/* Define to 1 if you have the declaration of `loginsuccess', and to 0 if you + don't. */ +/* #undef HAVE_DECL_LOGINSUCCESS */ + +/* Define to 1 if you have the declaration of `MAXSYMLINKS', and to 0 if you + don't. */ +#define HAVE_DECL_MAXSYMLINKS 0 + +/* Define to 1 if you have the declaration of `offsetof', and to 0 if you + don't. */ +#define HAVE_DECL_OFFSETOF 1 + +/* Define to 1 if you have the declaration of `O_NONBLOCK', and to 0 if you + don't. */ +#define HAVE_DECL_O_NONBLOCK 0 + +/* Define to 1 if you have the declaration of `passwdexpired', and to 0 if you + don't. */ +/* #undef HAVE_DECL_PASSWDEXPIRED */ + +/* Define to 1 if you have the declaration of `setauthdb', and to 0 if you + don't. */ +/* #undef HAVE_DECL_SETAUTHDB */ + +/* Define to 1 if you have the declaration of `SHUT_RD', and to 0 if you + don't. */ +#define HAVE_DECL_SHUT_RD 1 + +/* Define to 1 if you have the declaration of `writev', and to 0 if you don't. + */ +#define HAVE_DECL_WRITEV 0 + +/* Define to 1 if you have the declaration of `_getlong', and to 0 if you + don't. */ +/* #undef HAVE_DECL__GETLONG */ + +/* Define to 1 if you have the declaration of `_getshort', and to 0 if you + don't. */ +/* #undef HAVE_DECL__GETSHORT */ + +/* Define if you have /dev/ptmx */ +#define HAVE_DEV_PTMX 1 + +/* Define if you have /dev/ptc */ +/* #undef HAVE_DEV_PTS_AND_PTC */ + +/* Define to 1 if you have the header file. */ +#define HAVE_DIRENT_H 1 + +/* Define to 1 if you have the `dirfd' function. */ +/* #undef HAVE_DIRFD */ + +/* Define to 1 if you have the `dirname' function. */ +#define HAVE_DIRNAME 1 + +/* Define to 1 if you have the `DSA_generate_parameters_ex' function. */ +#define HAVE_DSA_GENERATE_PARAMETERS_EX 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_ENDIAN_H */ + +/* Define to 1 if you have the `endutent' function. */ +/* #undef HAVE_ENDUTENT */ + +/* Define to 1 if you have the `endutxent' function. */ +/* #undef HAVE_ENDUTXENT */ + +/* Define if your system has /etc/default/login */ +/* #undef HAVE_ETC_DEFAULT_LOGIN */ + +/* Define to 1 if you have the `EVP_sha256' function. */ +#define HAVE_EVP_SHA256 1 + +/* Define if you have ut_exit in utmp.h */ +/* #undef HAVE_EXIT_IN_UTMP */ + +/* Define to 1 if you have the `fchmod' function. */ +/* #undef HAVE_FCHMOD */ + +/* Define to 1 if you have the `fchown' function. */ +/* #undef HAVE_FCHOWN */ + +/* Use F_CLOSEM fcntl for closefrom */ +/* #undef HAVE_FCNTL_CLOSEM */ + +/* Define to 1 if you have the header file. */ +#define HAVE_FCNTL_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_FEATURES_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_FLOATINGPOINT_H */ + +/* Define to 1 if you have the `fmt_scaled' function. */ +/* #undef HAVE_FMT_SCALED */ + +/* Define to 1 if you have the `freeaddrinfo' function. */ +/* #undef HAVE_FREEADDRINFO */ + +/* Define to 1 if the system has the type `fsblkcnt_t'. */ +/* #undef HAVE_FSBLKCNT_T */ + +/* Define to 1 if the system has the type `fsfilcnt_t'. */ +/* #undef HAVE_FSFILCNT_T */ + +/* Define to 1 if you have the `fstatvfs' function. */ +/* #undef HAVE_FSTATVFS */ + +/* Define to 1 if you have the `futimes' function. */ +/* #undef HAVE_FUTIMES */ + +/* Define to 1 if you have the `gai_strerror' function. */ +/* #undef HAVE_GAI_STRERROR */ + +/* Define to 1 if you have the `getaddrinfo' function. */ +/* #undef HAVE_GETADDRINFO */ + +/* Define to 1 if you have the `getaudit' function. */ +/* #undef HAVE_GETAUDIT */ + +/* Define to 1 if you have the `getaudit_addr' function. */ +/* #undef HAVE_GETAUDIT_ADDR */ + +/* Define to 1 if you have the `getcwd' function. */ +#define HAVE_GETCWD 1 + +/* Define to 1 if you have the `getgrouplist' function. */ +/* #undef HAVE_GETGROUPLIST */ + +/* Define to 1 if you have the `getgrset' function. */ +/* #undef HAVE_GETGRSET */ + +/* Define to 1 if you have the `getlastlogxbyname' function. */ +/* #undef HAVE_GETLASTLOGXBYNAME */ + +/* Define to 1 if you have the `getluid' function. */ +/* #undef HAVE_GETLUID */ + +/* Define to 1 if you have the `getnameinfo' function. */ +/* #undef HAVE_GETNAMEINFO */ + +/* Define to 1 if you have the `getopt' function. */ +#define HAVE_GETOPT 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_GETOPT_H 1 + +/* Define if your getopt(3) defines and uses optreset */ +/* #undef HAVE_GETOPT_OPTRESET */ + +/* Define if your libraries define getpagesize() */ +#define HAVE_GETPAGESIZE 1 + +/* Define to 1 if you have the `getpeereid' function. */ +/* #undef HAVE_GETPEEREID */ + +/* Define to 1 if you have the `getpeerucred' function. */ +/* #undef HAVE_GETPEERUCRED */ + +/* Define to 1 if you have the `getpwanam' function. */ +/* #undef HAVE_GETPWANAM */ + +/* Define to 1 if you have the `getrlimit' function. */ +/* #undef HAVE_GETRLIMIT */ + +/* Define if getrrsetbyname() exists */ +/* #undef HAVE_GETRRSETBYNAME */ + +/* Define to 1 if you have the `getrusage' function. */ +/* #undef HAVE_GETRUSAGE */ + +/* Define to 1 if you have the `getseuserbyname' function. */ +/* #undef HAVE_GETSEUSERBYNAME */ + +/* Define to 1 if you have the `gettimeofday' function. */ +#define HAVE_GETTIMEOFDAY 1 + +/* Define to 1 if you have the `getttyent' function. */ +/* #undef HAVE_GETTTYENT */ + +/* Define to 1 if you have the `getutent' function. */ +/* #undef HAVE_GETUTENT */ + +/* Define to 1 if you have the `getutid' function. */ +/* #undef HAVE_GETUTID */ + +/* Define to 1 if you have the `getutline' function. */ +/* #undef HAVE_GETUTLINE */ + +/* Define to 1 if you have the `getutxent' function. */ +/* #undef HAVE_GETUTXENT */ + +/* Define to 1 if you have the `getutxid' function. */ +/* #undef HAVE_GETUTXID */ + +/* Define to 1 if you have the `getutxline' function. */ +/* #undef HAVE_GETUTXLINE */ + +/* Define to 1 if you have the `getutxuser' function. */ +/* #undef HAVE_GETUTXUSER */ + +/* Define to 1 if you have the `get_default_context_with_level' function. */ +/* #undef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL */ + +/* Define to 1 if you have the `glob' function. */ +/* #undef HAVE_GLOB */ + +/* Define to 1 if you have the header file. */ +#define HAVE_GLOB_H 1 + +/* Define to 1 if you have the `group_from_gid' function. */ +/* #undef HAVE_GROUP_FROM_GID */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_GSSAPI_GENERIC_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_GSSAPI_GSSAPI_GENERIC_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_GSSAPI_GSSAPI_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_GSSAPI_GSSAPI_KRB5_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_GSSAPI_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_GSSAPI_KRB5_H */ + +/* Define if HEADER.ad exists in arpa/nameser.h */ +/* #undef HAVE_HEADER_AD */ + +/* Define if you have ut_host in utmp.h */ +/* #undef HAVE_HOST_IN_UTMP */ + +/* Define if you have ut_host in utmpx.h */ +/* #undef HAVE_HOST_IN_UTMPX */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_IAF_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_IA_H */ + +/* Define if you have ut_id in utmp.h */ +/* #undef HAVE_ID_IN_UTMP */ + +/* Define if you have ut_id in utmpx.h */ +/* #undef HAVE_ID_IN_UTMPX */ + +/* Define to 1 if you have the `inet_aton' function. */ +/* #undef HAVE_INET_ATON */ + +/* Define to 1 if you have the `inet_ntoa' function. */ +/* #undef HAVE_INET_NTOA */ + +/* Define to 1 if you have the `inet_ntop' function. */ +/* #undef HAVE_INET_NTOP */ + +/* Define to 1 if you have the `innetgr' function. */ +/* #undef HAVE_INNETGR */ + +/* define if you have int64_t data type */ +#define HAVE_INT64_T 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_INTTYPES_H 1 + +/* define if you have intxx_t data type */ +#define HAVE_INTXX_T 1 + +/* Define to 1 if the system has the type `in_addr_t'. */ +/* #undef HAVE_IN_ADDR_T */ + +/* Define to 1 if the system has the type `in_port_t'. */ +/* #undef HAVE_IN_PORT_T */ + +/* Define if you have isblank(3C). */ +#define HAVE_ISBLANK 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LASTLOG_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LIBAUDIT_H */ + +/* Define to 1 if you have the `bsm' library (-lbsm). */ +/* #undef HAVE_LIBBSM */ + +/* Define to 1 if you have the `crypt' library (-lcrypt). */ +/* #undef HAVE_LIBCRYPT */ + +/* Define to 1 if you have the `dl' library (-ldl). */ +/* #undef HAVE_LIBDL */ + +/* Define to 1 if you have the header file. */ +#define HAVE_LIBGEN_H 1 + +/* Define if system has libiaf that supports set_id */ +/* #undef HAVE_LIBIAF */ + +/* Define to 1 if you have the `network' library (-lnetwork). */ +/* #undef HAVE_LIBNETWORK */ + +/* Define to 1 if you have the `nsl' library (-lnsl). */ +/* #undef HAVE_LIBNSL */ + +/* Define to 1 if you have the `pam' library (-lpam). */ +/* #undef HAVE_LIBPAM */ + +/* Define to 1 if you have the `socket' library (-lsocket). */ +/* #undef HAVE_LIBSOCKET */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LIBUTIL_H */ + +/* Define to 1 if you have the `xnet' library (-lxnet). */ +/* #undef HAVE_LIBXNET */ + +/* Define to 1 if you have the `z' library (-lz). */ +#define HAVE_LIBZ 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_LIMITS_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LINUX_IF_TUN_H */ + +/* Define if your libraries define login() */ +/* #undef HAVE_LOGIN */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LOGIN_CAP_H */ + +/* Define to 1 if you have the `login_getcapbool' function. */ +/* #undef HAVE_LOGIN_GETCAPBOOL */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_LOGIN_H */ + +/* Define to 1 if you have the `logout' function. */ +/* #undef HAVE_LOGOUT */ + +/* Define to 1 if you have the `logwtmp' function. */ +/* #undef HAVE_LOGWTMP */ + +/* Define to 1 if the system has the type `long double'. */ +#define HAVE_LONG_DOUBLE 1 + +/* Define to 1 if the system has the type `long long'. */ +#define HAVE_LONG_LONG 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_MAILLOCK_H */ + +/* Define to 1 if you have the `md5_crypt' function. */ +/* #undef HAVE_MD5_CRYPT */ + +/* Define if you want to allow MD5 passwords */ +/* #undef HAVE_MD5_PASSWORDS */ + +/* Define to 1 if you have the `memmove' function. */ +#define HAVE_MEMMOVE 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_MEMORY_H 1 + +/* Define to 1 if you have the `mkdtemp' function. */ +/* #undef HAVE_MKDTEMP */ + +/* Define to 1 if you have the `mmap' function. */ +/* #undef HAVE_MMAP */ + +/* define if you have mode_t data type */ +#define HAVE_MODE_T 1 + +/* Some systems put nanosleep outside of libc */ +/* #undef HAVE_NANOSLEEP */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_NDIR_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_NETDB_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_NETGROUP_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_NET_IF_TUN_H */ + +/* Define if you are on NeXT */ +/* #undef HAVE_NEXT */ + +/* Define to 1 if you have the `ngetaddrinfo' function. */ +/* #undef HAVE_NGETADDRINFO */ + +/* Define to 1 if you have the `nsleep' function. */ +/* #undef HAVE_NSLEEP */ + +/* Define to 1 if you have the `ogetaddrinfo' function. */ +/* #undef HAVE_OGETADDRINFO */ + +/* Define if you have an old version of PAM which takes only one argument to + pam_strerror */ +/* #undef HAVE_OLD_PAM */ + +/* Define to 1 if you have the `openlog_r' function. */ +/* #undef HAVE_OPENLOG_R */ + +/* Define to 1 if you have the `openpty' function. */ +/* #undef HAVE_OPENPTY */ + +/* Define if your ssl headers are included with #include + */ +#define HAVE_OPENSSL 1 + +/* Define if you have Digital Unix Security Integration Architecture */ +/* #undef HAVE_OSF_SIA */ + +/* Define to 1 if you have the `pam_getenvlist' function. */ +/* #undef HAVE_PAM_GETENVLIST */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_PAM_PAM_APPL_H */ + +/* Define to 1 if you have the `pam_putenv' function. */ +/* #undef HAVE_PAM_PUTENV */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_PATHS_H */ + +/* Define if you have ut_pid in utmp.h */ +/* #undef HAVE_PID_IN_UTMP */ + +/* define if you have pid_t data type */ +#define HAVE_PID_T 1 + +/* Define to 1 if you have the `poll' function. */ +/* #undef HAVE_POLL */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_POLL_H */ + +/* Define to 1 if you have the `prctl' function. */ +/* #undef HAVE_PRCTL */ + +/* Define to 1 if you have priveleged-port concept */ +/* #undef HAVE_PRIV_CONCEPT */ + +/* Define if you have /proc/$pid/fd */ +#define HAVE_PROC_PID 1 + +/* Define to 1 if you have the `pstat' function. */ +/* #undef HAVE_PSTAT */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_PTY_H */ + +/* Define to 1 if you have the `pututline' function. */ +/* #undef HAVE_PUTUTLINE */ + +/* Define to 1 if you have the `pututxline' function. */ +/* #undef HAVE_PUTUTXLINE */ + +/* Define if your password has a pw_change field */ +/* #undef HAVE_PW_CHANGE_IN_PASSWD */ + +/* Define if your password has a pw_class field */ +/* #undef HAVE_PW_CLASS_IN_PASSWD */ + +/* Define if your password has a pw_expire field */ +/* #undef HAVE_PW_EXPIRE_IN_PASSWD */ + +/* Define to 1 if you have the `readpassphrase' function. */ +/* #undef HAVE_READPASSPHRASE */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_READPASSPHRASE_H */ + +/* Define to 1 if you have the `realpath' function. */ +/* #undef HAVE_REALPATH */ + +/* Define to 1 if you have the `recvmsg' function. */ +/* #undef HAVE_RECVMSG */ + +/* sys/resource.h has RLIMIT_NPROC */ +/* #undef HAVE_RLIMIT_NPROC */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_RPC_TYPES_H */ + +/* Define to 1 if you have the `rresvport_af' function. */ +/* #undef HAVE_RRESVPORT_AF */ + +/* Define to 1 if you have the `RSA_generate_key_ex' function. */ +#define HAVE_RSA_GENERATE_KEY_EX 1 + +/* Define to 1 if you have the `RSA_get_default_method' function. */ +#define HAVE_RSA_GET_DEFAULT_METHOD 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SANDBOX_H */ + +/* Define to 1 if you have the `sandbox_init' function. */ +/* #undef HAVE_SANDBOX_INIT */ + +/* define if you have sa_family_t data type */ +/* #undef HAVE_SA_FAMILY_T */ + +/* Define if you have SecureWare-based protected password database */ +/* #undef HAVE_SECUREWARE */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SECURITY_PAM_APPL_H */ + +/* Define to 1 if you have the `sendmsg' function. */ +/* #undef HAVE_SENDMSG */ + +/* Define to 1 if you have the `setauthdb' function. */ +/* #undef HAVE_SETAUTHDB */ + +/* Define to 1 if you have the `setdtablesize' function. */ +/* #undef HAVE_SETDTABLESIZE */ + +/* Define to 1 if you have the `setegid' function. */ +/* #undef HAVE_SETEGID */ + +/* Define to 1 if you have the `setenv' function. */ +/* #undef HAVE_SETENV */ + +/* Define to 1 if you have the `seteuid' function. */ +/* #undef HAVE_SETEUID */ + +/* Define to 1 if you have the `setgroupent' function. */ +/* #undef HAVE_SETGROUPENT */ + +/* Define to 1 if you have the `setgroups' function. */ +/* #undef HAVE_SETGROUPS */ + +/* Define to 1 if you have the `setlogin' function. */ +/* #undef HAVE_SETLOGIN */ + +/* Define to 1 if you have the `setluid' function. */ +/* #undef HAVE_SETLUID */ + +/* Define to 1 if you have the `setpcred' function. */ +/* #undef HAVE_SETPCRED */ + +/* Define to 1 if you have the `setproctitle' function. */ +/* #undef HAVE_SETPROCTITLE */ + +/* Define to 1 if you have the `setregid' function. */ +/* #undef HAVE_SETREGID */ + +/* Define to 1 if you have the `setresgid' function. */ +/* #undef HAVE_SETRESGID */ + +/* Define to 1 if you have the `setresuid' function. */ +/* #undef HAVE_SETRESUID */ + +/* Define to 1 if you have the `setreuid' function. */ +/* #undef HAVE_SETREUID */ + +/* Define to 1 if you have the `setrlimit' function. */ +/* #undef HAVE_SETRLIMIT */ + +/* Define to 1 if you have the `setsid' function. */ +/* #undef HAVE_SETSID */ + +/* Define to 1 if you have the `setutent' function. */ +/* #undef HAVE_SETUTENT */ + +/* Define to 1 if you have the `setutxdb' function. */ +/* #undef HAVE_SETUTXDB */ + +/* Define to 1 if you have the `setutxent' function. */ +/* #undef HAVE_SETUTXENT */ + +/* Define to 1 if you have the `setvbuf' function. */ +#define HAVE_SETVBUF 1 + +/* Define to 1 if you have the `set_id' function. */ +/* #undef HAVE_SET_ID */ + +/* Define to 1 if you have the `SHA256_Update' function. */ +#define HAVE_SHA256_UPDATE 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SHA2_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SHADOW_H */ + +/* Define to 1 if you have the `sigaction' function. */ +/* #undef HAVE_SIGACTION */ + +/* Define to 1 if you have the `sigvec' function. */ +/* #undef HAVE_SIGVEC */ + +/* Define to 1 if the system has the type `sig_atomic_t'. */ +#define HAVE_SIG_ATOMIC_T 1 + +/* define if you have size_t data type */ +#define HAVE_SIZE_T 1 + +/* Define to 1 if you have the `snprintf' function. */ +#define HAVE_SNPRINTF 1 + +/* Define to 1 if you have the `socketpair' function. */ +/* #undef HAVE_SOCKETPAIR */ + +/* Have PEERCRED socket option */ +/* #undef HAVE_SO_PEERCRED */ + +/* define if you have ssize_t data type */ +#define HAVE_SSIZE_T 1 + +/* Fields in struct sockaddr_storage */ +#define HAVE_SS_FAMILY_IN_SS 1 + +/* Define to 1 if you have the `statfs' function. */ +/* #undef HAVE_STATFS */ + +/* Define to 1 if you have the `statvfs' function. */ +/* #undef HAVE_STATVFS */ + +/* Define to 1 if you have the header file. */ +#define HAVE_STDDEF_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STDINT_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STDLIB_H 1 + +/* Define to 1 if you have the `strdup' function. */ +#define HAVE_STRDUP 1 + +/* Define to 1 if you have the `strerror' function. */ +#define HAVE_STRERROR 1 + +/* Define to 1 if you have the `strftime' function. */ +#define HAVE_STRFTIME 1 + +/* Silly mkstemp() */ +/* #undef HAVE_STRICT_MKSTEMP */ + +/* Define to 1 if you have the header file. */ +#define HAVE_STRINGS_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_STRING_H 1 + +/* Define to 1 if you have the `strlcat' function. */ +/* #undef HAVE_STRLCAT */ + +/* Define to 1 if you have the `strlcpy' function. */ +/* #undef HAVE_STRLCPY */ + +/* Define to 1 if you have the `strmode' function. */ +/* #undef HAVE_STRMODE */ + +/* Define to 1 if you have the `strnvis' function. */ +/* #undef HAVE_STRNVIS */ + +/* Define to 1 if you have the `strptime' function. */ +/* #undef HAVE_STRPTIME */ + +/* Define to 1 if you have the `strsep' function. */ +/* #undef HAVE_STRSEP */ + +/* Define to 1 if you have the `strtoll' function. */ +#define HAVE_STRTOLL 1 + +/* Define to 1 if you have the `strtonum' function. */ +/* #undef HAVE_STRTONUM */ + +/* Define to 1 if you have the `strtoul' function. */ +#define HAVE_STRTOUL 1 + +/* define if you have struct addrinfo data type */ +#define HAVE_STRUCT_ADDRINFO 1 + +/* define if you have struct in6_addr data type */ +/* #undef HAVE_STRUCT_IN6_ADDR */ + +/* define if you have struct sockaddr_in6 data type */ +/* #undef HAVE_STRUCT_SOCKADDR_IN6 */ + +/* Define to 1 if `sin6_scope_id' is a member of `struct sockaddr_in6'. */ +/* #undef HAVE_STRUCT_SOCKADDR_IN6_SIN6_SCOPE_ID */ + +/* define if you have struct sockaddr_storage data type */ +#define HAVE_STRUCT_SOCKADDR_STORAGE 1 + +/* Define to 1 if `st_blksize' is a member of `struct stat'. */ +/* #undef HAVE_STRUCT_STAT_ST_BLKSIZE */ + +/* Define to 1 if the system has the type `struct timespec'. */ +/* #undef HAVE_STRUCT_TIMESPEC */ + +/* define if you have struct timeval */ +#define HAVE_STRUCT_TIMEVAL 1 + +/* Define to 1 if you have the `swap32' function. */ +/* #undef HAVE_SWAP32 */ + +/* Define to 1 if you have the `sysconf' function. */ +/* #undef HAVE_SYSCONF */ + +/* Define if you have syslen in utmpx.h */ +/* #undef HAVE_SYSLEN_IN_UTMPX */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_AUDIT_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_BITYPES_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_BSDTTY_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_CDEFS_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_DIR_H */ + +/* Define if your system defines sys_errlist[] */ +/* #undef HAVE_SYS_ERRLIST */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_MMAN_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_MOUNT_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_NDIR_H */ + +/* Define if your system defines sys_nerr */ +/* #undef HAVE_SYS_NERR */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_POLL_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_PRCTL_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_PSTAT_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_PTMS_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_SELECT_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_STATVFS_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_STAT_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_STREAM_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_STROPTS_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_STRTIO_H */ + +/* Force use of sys/syslog.h on Ultrix */ +/* #undef HAVE_SYS_SYSLOG_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_SYSMACROS_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_TIMERS_H */ + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_TIME_H 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_SYS_TYPES_H 1 + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_SYS_UN_H */ + +/* Define to 1 if you have the `tcgetpgrp' function. */ +/* #undef HAVE_TCGETPGRP */ + +/* Define to 1 if you have the `tcsendbreak' function. */ +/* #undef HAVE_TCSENDBREAK */ + +/* Define to 1 if you have the `time' function. */ +#define HAVE_TIME 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_TIME_H 1 + +/* Define if you have ut_time in utmp.h */ +/* #undef HAVE_TIME_IN_UTMP */ + +/* Define if you have ut_time in utmpx.h */ +/* #undef HAVE_TIME_IN_UTMPX */ + +/* Define to 1 if you have the `timingsafe_bcmp' function. */ +/* #undef HAVE_TIMINGSAFE_BCMP */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_TMPDIR_H */ + +/* Define to 1 if you have the `truncate' function. */ +/* #undef HAVE_TRUNCATE */ + +/* Define to 1 if you have tty support */ +/* #undef HAVE_TTY */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_TTYENT_H */ + +/* Define if you have ut_tv in utmp.h */ +/* #undef HAVE_TV_IN_UTMP */ + +/* Define if you have ut_tv in utmpx.h */ +/* #undef HAVE_TV_IN_UTMPX */ + +/* Define if you have ut_type in utmp.h */ +/* #undef HAVE_TYPE_IN_UTMP */ + +/* Define if you have ut_type in utmpx.h */ +/* #undef HAVE_TYPE_IN_UTMPX */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_UCRED_H */ + +/* define if you have uintxx_t data type */ +#define HAVE_UINTXX_T 1 + +/* Define to 1 if you have the header file. */ +#define HAVE_UNISTD_H 1 + +/* Define to 1 if you have the `unsetenv' function. */ +/* #undef HAVE_UNSETENV */ + +/* Define to 1 if the system has the type `unsigned long long'. */ +#define HAVE_UNSIGNED_LONG_LONG 1 + +/* Define to 1 if you have the `updwtmp' function. */ +/* #undef HAVE_UPDWTMP */ + +/* Define to 1 if you have the `updwtmpx' function. */ +/* #undef HAVE_UPDWTMPX */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_USERSEC_H */ + +/* Define to 1 if you have the `user_from_uid' function. */ +/* #undef HAVE_USER_FROM_UID */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_UTIL_H */ + +/* Define to 1 if you have the `utimes' function. */ +/* #undef HAVE_UTIMES */ + +/* Define to 1 if you have the header file. */ +#define HAVE_UTIME_H 1 + +/* Define to 1 if you have the `utmpname' function. */ +/* #undef HAVE_UTMPNAME */ + +/* Define to 1 if you have the `utmpxname' function. */ +/* #undef HAVE_UTMPXNAME */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_UTMPX_H */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_UTMP_H */ + +/* define if you have u_char data type */ +/* #undef HAVE_U_CHAR */ + +/* define if you have u_int data type */ +/* #undef HAVE_U_INT */ + +/* define if you have u_int64_t data type */ +/* #undef HAVE_U_INT64_T */ + +/* define if you have u_intxx_t data type */ +/* #undef HAVE_U_INTXX_T */ + +/* Define to 1 if you have the `vasprintf' function. */ +/* #undef HAVE_VASPRINTF */ + +/* Define if va_copy exists */ +#define HAVE_VA_COPY 1 + +/* Define to 1 if you have the `vhangup' function. */ +/* #undef HAVE_VHANGUP */ + +/* Define to 1 if you have the header file. */ +/* #undef HAVE_VIS_H */ + +/* Define to 1 if you have the `vsnprintf' function. */ +#define HAVE_VSNPRINTF 1 + +/* Define to 1 if you have the `waitpid' function. */ +/* #undef HAVE_WAITPID */ + +/* Define to 1 if you have the `_getlong' function. */ +/* #undef HAVE__GETLONG */ + +/* Define to 1 if you have the `_getpty' function. */ +/* #undef HAVE__GETPTY */ + +/* Define to 1 if you have the `_getshort' function. */ +/* #undef HAVE__GETSHORT */ + +/* Define if you have struct __res_state _res as an extern */ +#define HAVE__RES_EXTERN 1 + +/* Define to 1 if you have the `__b64_ntop' function. */ +/* #undef HAVE___B64_NTOP */ + +/* Define to 1 if you have the `__b64_pton' function. */ +/* #undef HAVE___B64_PTON */ + +/* Define if compiler implements __FUNCTION__ */ +#define HAVE___FUNCTION__ 1 + +/* Define if libc defines __progname */ +/* #undef HAVE___PROGNAME */ + +/* Fields in struct sockaddr_storage */ +/* #undef HAVE___SS_FAMILY_IN_SS */ + +/* Define if __va_copy exists */ +#define HAVE___VA_COPY 1 + +/* Define if compiler implements __func__ */ +#define HAVE___func__ 1 + +/* Define this if you are using the Heimdal version of Kerberos V5 */ +/* #undef HEIMDAL */ + +/* Define if you need to use IP address instead of hostname in $DISPLAY */ +/* #undef IPADDR_IN_DISPLAY */ + +/* Detect IPv4 in IPv6 mapped addresses and treat as IPv4 */ +/* #undef IPV4_IN_IPV6 */ + +/* Define if your system choked on IP TOS setting */ +#define IP_TOS_IS_BROKEN 1 + +/* Define if you want Kerberos 5 support */ +#define KRB5 1 + +/* Define if pututxline updates lastlog too */ +/* #undef LASTLOG_WRITE_PUTUTXLINE */ + +/* Define if you want TCP Wrappers support */ +/* #undef LIBWRAP */ + +/* Define to whatever link() returns for "not supported" if it doesn't return + EOPNOTSUPP. */ +/* #undef LINK_OPNOTSUPP_ERRNO */ + +/* Adjust Linux out-of-memory killer */ +/* #undef LINUX_OOM_ADJUST */ + +/* max value of long long calculated by configure */ +/* #undef LLONG_MAX */ + +/* min value of long long calculated by configure */ +/* #undef LLONG_MIN */ + +/* Account locked with pw(1) */ +/* #undef LOCKED_PASSWD_PREFIX */ + +/* String used in /etc/passwd to denote locked account */ +/* #undef LOCKED_PASSWD_STRING */ + +/* String used in /etc/passwd to denote locked account */ +/* #undef LOCKED_PASSWD_SUBSTR */ + +/* Some versions of /bin/login need the TERM supplied on the commandline */ +/* #undef LOGIN_NEEDS_TERM */ + +/* Some systems need a utmpx entry for /bin/login to work */ +/* #undef LOGIN_NEEDS_UTMPX */ + +/* Define if your login program cannot handle end of options ("--") */ +/* #undef LOGIN_NO_ENDOPT */ + +/* If your header files don't define LOGIN_PROGRAM, then use this (detected) + from environment and PATH */ +#define LOGIN_PROGRAM_FALLBACK "/usr/bin/login" + +/* Set this to your mail directory if you do not have _PATH_MAILDIR */ +#define MAIL_DIRECTORY "/var/spool/mail" + +/* Define on *nto-qnx systems */ +/* #undef MISSING_FD_MASK */ + +/* Define on *nto-qnx systems */ +/* #undef MISSING_HOWMANY */ + +/* Define on *nto-qnx systems */ +/* #undef MISSING_NFDBITS */ + +/* Need setpgrp to acquire controlling tty */ +/* #undef NEED_SETPGRP */ + +/* Define if the concept of ports only accessible to superusers isn't known + */ +#define NO_IPPORT_RESERVED_CONCEPT 1 + +/* Define if you don't want to use lastlog in session.c */ +/* #undef NO_SSH_LASTLOG */ + +/* Define if X11 doesn't support AF_UNIX sockets on that system */ +#define NO_X11_UNIX_SOCKETS 1 + +/* Define if EVP_DigestUpdate returns void */ +/* #undef OPENSSL_EVP_DIGESTUPDATE_VOID */ + +/* libcrypto includes complete ECC support */ +#define OPENSSL_HAS_ECC 1 + +/* libcrypto is missing AES 192 and 256 bit functions */ +/* #undef OPENSSL_LOBOTOMISED_AES */ + +/* Define if you want OpenSSL's internally seeded PRNG only */ +#define OPENSSL_PRNG_ONLY 1 + +/* Define to the address where bug reports for this package should be sent. */ +#define PACKAGE_BUGREPORT "openssh-unix-dev@mindrot.org" + +/* Define to the full name of this package. */ +#define PACKAGE_NAME "OpenSSH" + +/* Define to the full name and version of this package. */ +#define PACKAGE_STRING "OpenSSH Portable" + +/* Define to the one symbol short name of this package. */ +#define PACKAGE_TARNAME "openssh" + +/* Define to the home page for this package. */ +#define PACKAGE_URL "" + +/* Define to the version of this package. */ +#define PACKAGE_VERSION "Portable" + +/* Define if you are using Solaris-derived PAM which passes pam_messages to + the conversation function with an extra level of indirection */ +/* #undef PAM_SUN_CODEBASE */ + +/* Work around problematic Linux PAM modules handling of PAM_TTY */ +/* #undef PAM_TTY_KLUDGE */ + +/* must supply username to passwd */ +/* #undef PASSWD_NEEDS_USERNAME */ + +/* Port number of PRNGD/EGD random number socket */ +/* #undef PRNGD_PORT */ + +/* Location of PRNGD/EGD random number socket */ +/* #undef PRNGD_SOCKET */ + +/* read(1) can return 0 for a non-closed fd */ +/* #undef PTY_ZEROREAD */ + +/* Sandbox using Darwin sandbox_init(3) */ +/* #undef SANDBOX_DARWIN */ + +/* no privsep sandboxing */ +#define SANDBOX_NULL 1 + +/* Sandbox using setrlimit(2) */ +/* #undef SANDBOX_RLIMIT */ + +/* Sandbox using systrace(4) */ +/* #undef SANDBOX_SYSTRACE */ + +/* Define if your platform breaks doing a seteuid before a setuid */ +/* #undef SETEUID_BREAKS_SETUID */ + +/* The size of `char', as computed by sizeof. */ +#define SIZEOF_CHAR 1 + +/* The size of `int', as computed by sizeof. */ +#define SIZEOF_INT 4 + +/* The size of `long int', as computed by sizeof. */ +#define SIZEOF_LONG_INT 4 + +/* The size of `long long int', as computed by sizeof. */ +#define SIZEOF_LONG_LONG_INT 8 + +/* The size of `short int', as computed by sizeof. */ +#define SIZEOF_SHORT_INT 2 + +/* Define if you want S/Key support */ +/* #undef SKEY */ + +/* Define if your skeychallenge() function takes 4 arguments (NetBSD) */ +/* #undef SKEYCHALLENGE_4ARG */ + +/* Define as const if snprintf() can declare const char *fmt */ +#define SNPRINTF_CONST const + +/* Define to a Set Process Title type if your system is supported by + bsd-setproctitle.c */ +/* #undef SPT_TYPE */ + +/* Define if sshd somehow reacquires a controlling TTY after setsid() */ +/* #undef SSHD_ACQUIRES_CTTY */ + +/* Define if pam_chauthtok wants real uid set to the unpriv'ed user */ +/* #undef SSHPAM_CHAUTHTOK_NEEDS_RUID */ + +/* Use audit debugging module */ +/* #undef SSH_AUDIT_EVENTS */ + +/* Windows is sensitive to read buffer size */ +/* #undef SSH_IOBUFSZ */ + +/* non-privileged user for privilege separation */ +#define SSH_PRIVSEP_USER "sshd" + +/* Use tunnel device compatibility to OpenBSD */ +/* #undef SSH_TUN_COMPAT_AF */ + +/* Open tunnel devices the FreeBSD way */ +/* #undef SSH_TUN_FREEBSD */ + +/* Open tunnel devices the Linux tun/tap way */ +/* #undef SSH_TUN_LINUX */ + +/* No layer 2 tunnel support */ +/* #undef SSH_TUN_NO_L2 */ + +/* Open tunnel devices the OpenBSD way */ +/* #undef SSH_TUN_OPENBSD */ + +/* Prepend the address family to IP tunnel traffic */ +/* #undef SSH_TUN_PREPEND_AF */ + +/* Define to 1 if you have the ANSI C header files. */ +#define STDC_HEADERS 1 + +/* Define if you want a different $PATH for the superuser */ +/* #undef SUPERUSER_PATH */ + +/* syslog_r function is safe to use in in a signal handler */ +/* #undef SYSLOG_R_SAFE_IN_SIGHAND */ + +/* Support passwords > 8 chars */ +/* #undef UNIXWARE_LONG_PASSWORDS */ + +/* Specify default $PATH */ +#define USER_PATH "/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin" + +/* Define this if you want to use libkafs' AFS support */ +/* #undef USE_AFS */ + +/* Use BSM audit module */ +/* #undef USE_BSM_AUDIT */ + +/* Use btmp to log bad logins */ +/* #undef USE_BTMP */ + +/* Use libedit for sftp */ +/* #undef USE_LIBEDIT */ + +/* Use Linux audit module */ +/* #undef USE_LINUX_AUDIT */ + +/* Enable OpenSSL engine support */ +/* #undef USE_OPENSSL_ENGINE */ + +/* Define if you want to enable PAM support */ +/* #undef USE_PAM */ + +/* Use PIPES instead of a socketpair() */ +#define USE_PIPES 1 + +/* Define if you want to sanitize fds */ +/* #undef USE_SANITISE_STDFD */ + +/* Define if you have Solaris process contracts */ +/* #undef USE_SOLARIS_PROCESS_CONTRACTS */ + +/* Define if you have Solaris projects */ +/* #undef USE_SOLARIS_PROJECTS */ + +/* Define if you shouldn't strip 'tty' from your ttyname in [uw]tmp */ +/* #undef WITH_ABBREV_NO_TTY */ + +/* Define if you want to enable AIX4's authenticate function */ +/* #undef WITH_AIXAUTHENTICATE */ + +/* Define if you have/want arrays (cluster-wide session managment, not C + arrays) */ +/* #undef WITH_IRIX_ARRAY */ + +/* Define if you want IRIX audit trails */ +/* #undef WITH_IRIX_AUDIT */ + +/* Define if you want IRIX kernel jobs */ +/* #undef WITH_IRIX_JOBS */ + +/* Define if you want IRIX project management */ +/* #undef WITH_IRIX_PROJECT */ + +/* Define if you want SELinux support. */ +/* #undef WITH_SELINUX */ + +/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most + significant byte first (like Motorola and SPARC, unlike Intel). */ +#if defined AC_APPLE_UNIVERSAL_BUILD +# if defined __BIG_ENDIAN__ +# define WORDS_BIGENDIAN 1 +# endif +#else +# ifndef WORDS_BIGENDIAN +/* # undef WORDS_BIGENDIAN */ +# endif +#endif + +/* Define if xauth is found in your path */ +/* #undef XAUTH_PATH */ + +/* Enable large inode numbers on Mac OS X 10.5. */ +#ifndef _DARWIN_USE_64_BIT_INODE +# define _DARWIN_USE_64_BIT_INODE 1 +#endif + +/* Number of bits in a file offset, on hosts where this is settable. */ +/* #undef _FILE_OFFSET_BITS */ + +/* Define for large files, on AIX-style hosts. */ +/* #undef _LARGE_FILES */ + +/* log for bad login attempts */ +/* #undef _PATH_BTMP */ + +/* Full path of your "passwd" program */ +#define _PATH_PASSWD_PROG "/usr/bin/passwd" + +/* Specify location of ssh.pid */ +#define _PATH_SSH_PIDDIR "/var/run" + +/* Define if we don't have struct __res_state in resolv.h */ +#define __res_state state + +/* Define to `__inline__' or `__inline' if that's what the C compiler + calls it, or to nothing if 'inline' is not supported under any name. */ +#ifndef __cplusplus +/* #undef inline */ +#endif + +/* type to use in place of socklen_t if not defined */ +/* #undef socklen_t */ +#define WIN32_LEAN_AND_MEAN 1 +#define _CRT_SECURE_NO_DEPRECATE 1 +#define _CRT_NONSTDC_NO_DEPRECATE 1 +#define WIN32_FIXME 1 +#undef USE_NTCREATETOKEN + +/* Define if you must implement a startup_needs function for your platform */ +#define HAVE_STARTUP_NEEDS 1 + +/* Define if your platform uses Winsock instead of BSD sockets (yeah, there are a lot of platforms like this :) */ +#define HAVE_WINSOCK 1 + +#define snprintf _snprintf + +#define BROKEN_READV_COMPARISON + +/* Override detection of some headers and functions on MinGW */ +#undef BROKEN_SNPRINTF +#define GETPGRP_VOID 1 +#undef HAVE_CRYPT_H +#define HAVE_DAEMON 1 +#undef HAVE_ENDIAN_H +#undef HAVE_FCNTL_H +#define HAVE_FREEADDRINFO 1 +#define HAVE_GAI_STRERROR 1 +#define HAVE_GETADDRINFO 1 +#define HAVE_GETGROUPLIST 1 +#define HAVE_GETNAMEINFO 1 +#undef HAVE_ID_IN_UTMPX +#define HAVE_INET_ATON 1 +#define HAVE_INET_NTOA 1 +#define HAVE_INNETGR 1 +#undef HAVE_LIBCRYPT +#define HAVE_MKDTEMP 1 +#define HAVE_NANOSLEEP 1 +#undef HAVE_PATHS_H +#undef HAVE_POLL_H +#undef HAVE_PROC_PID +#undef HAVE_PTY_H +#define HAVE_NANOSLEEP 1 +#define HAVE_READPASSPHRASE 1 +#define HAVE_REALPATH 1 +#undef HAVE_SIG_ATOMIC_T +#define HAVE_SIZE_T 1 +#undef HAVE_STRERROR +#define HAVE_STRMODE 1 +#undef __USE_W32_SOCKETS + +#ifdef __MINGW32__ /* FIXME: Use autoconf to set this correctly */ +/* Define to 1 if you have the `strcasecmp' function. */ +#define HAVE_STRCASECMP 1 + +/* Define to 1 if you have the `strncasecmp' function. */ +#define HAVE_STRNCASECMP 1 +#endif + +#define HAVE_STRUCT_IN6_ADDR 1 +#define HAVE_STRUCT_SOCKADDR_IN6 1 +#define HAVE_STRUCT_TIMEVAL 1 +#undef HAVE_SYS_CDEFS_H +#undef HAVE_SYS_SYSMACROS_H +#undef HAVE_SYS_MMAN_H +#undef HAVE_SYS_UN_H + +#define HAVE_TCGETPGRP 1 + +#undef HAVE_TIME + +#define HAVE_TRUNCATE 1 + +#define HAVE_VIS_H 1 + +#define MISSING_FD_MASK 1 +#define MISSING_HOWMANY 1 +#define MISSING_NFDBITS 1 + +#undef SSH_PRIVSEP_USER + +#define HAVE_OPENPTY 1 + +/* Fixes for loginrec.c */ +#undef CONF_UTMP_FILE +#undef CONF_WTMPX_FILE +#undef CONF_WTMP_FILE +#undef CONF_UTMPX_FILE +#undef CONF_LASTLOG_FILE + +#define BROKEN_SYS_TERMIO_H + +#define strerror strerror_win32 + +#define strerror strerror_win32 + +// PRAGMA SYS PORT +#define WITH_OPENSSL 1 +#define HAVE_KRB5_GET_ERROR_MESSAGE 1 +#define HAVE_KRB5_FREE_ERROR_MESSAGE 1 +#define HAVE_DECL_NFDBITS 0 +#define HAVE_DECL_HOWMANY 0 + +//#define HAVE_ARC4RANDOM_UNIFORM 1 + diff --git a/config.h.tail b/config.h.tail index 7e0a247..ad178e6 100644 --- a/config.h.tail +++ b/config.h.tail @@ -88,3 +88,15 @@ #define BROKEN_SYS_TERMIO_H #define strerror strerror_win32 + +#define strerror strerror_win32 + +// PRAGMA SYS PORT +#define WITH_OPENSSL 1 +#define HAVE_KRB5_GET_ERROR_MESSAGE 1 +#define HAVE_KRB5_FREE_ERROR_MESSAGE 1 +#define HAVE_DECL_NFDBITS 0 +#define HAVE_DECL_HOWMANY 0 + +//#define HAVE_ARC4RANDOM_UNIFORM 1 + diff --git a/contrib/win32/openssh/openssh.sln b/contrib/win32/openssh/openssh.sln index 2e0ae42..adb5b24 100644 --- a/contrib/win32/openssh/openssh.sln +++ b/contrib/win32/openssh/openssh.sln @@ -1,4 +1,4 @@ - + Microsoft Visual Studio Solution File, Format Version 9.00 # Visual Studio 2005 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "libssh", "libssh\libssh.vcproj", "{EBDE90BD-BD30-4128-8E79-50224624628E}" diff --git a/crypto_api.h b/crypto_api.h new file mode 100644 index 0000000..5820ce8 --- /dev/null +++ b/crypto_api.h @@ -0,0 +1,44 @@ +/* $OpenBSD: crypto_api.h,v 1.3 2013/12/17 10:36:38 markus Exp $ */ + +/* + * Assembled from generated headers and source files by Markus Friedl. + * Placed in the public domain. + */ + +#ifndef crypto_api_h +#define crypto_api_h + +#ifdef HAVE_STDINT_H +# include +#endif +#include + +typedef int32_t crypto_int32; +typedef uint32_t crypto_uint32; + +#define randombytes(buf, buf_len) arc4random_buf((buf), (buf_len)) + +#define crypto_hashblocks_sha512_STATEBYTES 64U +#define crypto_hashblocks_sha512_BLOCKBYTES 128U + +int crypto_hashblocks_sha512(unsigned char *, const unsigned char *, + unsigned long long); + +#define crypto_hash_sha512_BYTES 64U + +int crypto_hash_sha512(unsigned char *, const unsigned char *, + unsigned long long); + +int crypto_verify_32(const unsigned char *, const unsigned char *); + +#define crypto_sign_ed25519_SECRETKEYBYTES 64U +#define crypto_sign_ed25519_PUBLICKEYBYTES 32U +#define crypto_sign_ed25519_BYTES 64U + +int crypto_sign_ed25519(unsigned char *, unsigned long long *, + const unsigned char *, unsigned long long, const unsigned char *); +int crypto_sign_ed25519_open(unsigned char *, unsigned long long *, + const unsigned char *, unsigned long long, const unsigned char *); +int crypto_sign_ed25519_keypair(unsigned char *, unsigned char *); + +#endif /* crypto_api_h */ diff --git a/d2utmpa00408 b/d2utmpa00408 new file mode 100644 index 0000000..d064585 --- /dev/null +++ b/d2utmpa00408 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC6mQW39+Uvy7DPCJd6aHJ0RXDnL+NC7VsC+SUAvosyMwb3PrxjFobyJ24yl6HEpdHvmlbNkipObew3T/drNQ0QK/H4Wt/7mkIdxN6IbF9hpFaLt8Fyd0yd7cpdxGHjYVEjuUBHgsOI/2k2V3zZx/c31X87Zjwb18JM8DKNk/ewKBj1MZVDcBdIWQT5WORPmpCVV7CeLE1TiXc5b2/2wNOOBdKPuDYBDGdPShqD91IaXmIs9KFUo4jFBE/V+K6fesUngudnouKdhFzSokoXbIpFNyi5L2TURtS9ebwm0Zkaz2xW86DJ6bSMtuMqhUDsJOZFmHh8NnTwuSDPUVXhlzbZ @oasis diff --git a/d2utmpa00420 b/d2utmpa00420 new file mode 100644 index 0000000..4e8153f --- /dev/null +++ b/d2utmpa00420 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCci4oy7TlKHy9d8+4slhm66MzE9haGbasI3Wwt6LqrvK6X0jtVCA+04nBWoBH7m+8UJrd6mqldSsOVETiZFLm4sNl95MmKirWHmoSeJy12wyovQXYkyYRH0T4J2lDna6JbgCPuaZpgIq88sxb/Z8RVf9fjStd6aNIyM95BalRnL839mYJxXpfPNMBkXGED3w/m5S6GgxX8VrP1cC6N+kXao5nyctZqFZAQbtj122LAeFNWN6W0Ehy5mx1VETFII+h9vSJ2LwDNHNrYBPV2IOtJ/tQ8ajSoc60bNvJjJtgld/he3KlmrgjtKcC4Akr1Bmegm+iI4pg2VgUnpocTdDfb @oasis diff --git a/d2utmpa00672 b/d2utmpa00672 new file mode 100644 index 0000000..c236aab --- /dev/null +++ b/d2utmpa00672 @@ -0,0 +1,12 @@ +-----BEGIN DSA PRIVATE KEY----- +MIIBuwIBAAKBgQC8GRz9p5YiVi9BA7jNO3MXV2NkPlMfCv2xjieBE6bflmHKoKhC +ewlyrk1SfLJQgVbOZvdrgtsuYGgKfpqu8qWlVnEHOLYSa6f6CDcjRXa5X+T2+tBZ +zYZ7UBlEFuDLoCEpSOopsDzPz+wvyGBH7/DPtHhbLB/ipIZYXMe/QXcyFwIVAIA9 +pz8MNAL+c9x9cNW9V40GIlnBAoGAWXg5YYAHb/+ZRHXBTTULmY8LT8Mhp8JDrIWY +TE+JHlFmGtHJsajoQNo5yFCj6ep1YqeKSZdj3x0JXSJDLLQNuiaGL74MdEasYt3g +rG04HE7k3tXfSwSM0cKhSFU/MKo9rhXStRcKdG5ZN4d+pTnoyV/ncfooiRJprqXH +l4yv2vMCgYEAp8OaX5N4UtY0KID34SNj5b3hsAoK5IZ3mBsX7Ngg6Rbnr7h2s5sK +sus5FiMtmymVssY84YZTRVP6oZWSShG/WOcUQrzo8zxKH9cj6pc/haSraTakSXLK +bbsI2Bj1nMYmXZxSelLUZS0Xwsp3EVxxLYmrzduXyV3ewvrHFZ1q6jsCFH3IbB4V +XAMosp5QzPxxeQQtAjVD +-----END DSA PRIVATE KEY----- diff --git a/d2utmpa01232 b/d2utmpa01232 new file mode 100644 index 0000000..281890d --- /dev/null +++ b/d2utmpa01232 @@ -0,0 +1,7 @@ +-----BEGIN OPENSSH PRIVATE KEY----- +b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW +QyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyAAAAJAJSj5MCUo+ +TAAAAAtzc2gtZWQyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyA +AAAECGe69spV/5acdoNqiARzB79o5ASCy2SQ6Ng7SWENmDguybqQdTc7bH8q7NxsBSFkZi +yhzgafpiIVy66WzHiCzIAAAABkBvYXNpcwECAwQFBgc= +-----END OPENSSH PRIVATE KEY----- diff --git a/d2utmpa01324 b/d2utmpa01324 new file mode 100644 index 0000000..58f8ff4 --- /dev/null +++ b/d2utmpa01324 @@ -0,0 +1 @@ +ssh-dss AAAAB3NzaC1kc3MAAACBALwZHP2nliJWL0EDuM07cxdXY2Q+Ux8K/bGOJ4ETpt+WYcqgqEJ7CXKuTVJ8slCBVs5m92uC2y5gaAp+mq7ypaVWcQc4thJrp/oINyNFdrlf5Pb60FnNhntQGUQW4MugISlI6imwPM/P7C/IYEfv8M+0eFssH+Kkhlhcx79BdzIXAAAAFQCAPac/DDQC/nPcfXDVvVeNBiJZwQAAAIBZeDlhgAdv/5lEdcFNNQuZjwtPwyGnwkOshZhMT4keUWYa0cmxqOhA2jnIUKPp6nVip4pJl2PfHQldIkMstA26JoYvvgx0Rqxi3eCsbTgcTuTe1d9LBIzRwqFIVT8wqj2uFdK1Fwp0blk3h36lOejJX+dx+iiJEmmupceXjK/a8wAAAIEAp8OaX5N4UtY0KID34SNj5b3hsAoK5IZ3mBsX7Ngg6Rbnr7h2s5sKsus5FiMtmymVssY84YZTRVP6oZWSShG/WOcUQrzo8zxKH9cj6pc/haSraTakSXLKbbsI2Bj1nMYmXZxSelLUZS0Xwsp3EVxxLYmrzduXyV3ewvrHFZ1q6js= @oasis diff --git a/d2utmpa01468 b/d2utmpa01468 new file mode 100644 index 0000000..4e8153f --- /dev/null +++ b/d2utmpa01468 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCci4oy7TlKHy9d8+4slhm66MzE9haGbasI3Wwt6LqrvK6X0jtVCA+04nBWoBH7m+8UJrd6mqldSsOVETiZFLm4sNl95MmKirWHmoSeJy12wyovQXYkyYRH0T4J2lDna6JbgCPuaZpgIq88sxb/Z8RVf9fjStd6aNIyM95BalRnL839mYJxXpfPNMBkXGED3w/m5S6GgxX8VrP1cC6N+kXao5nyctZqFZAQbtj122LAeFNWN6W0Ehy5mx1VETFII+h9vSJ2LwDNHNrYBPV2IOtJ/tQ8ajSoc60bNvJjJtgld/he3KlmrgjtKcC4Akr1Bmegm+iI4pg2VgUnpocTdDfb @oasis diff --git a/d2utmpa02828 b/d2utmpa02828 new file mode 100644 index 0000000..c58bc9d --- /dev/null +++ b/d2utmpa02828 @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEowIBAAKCAQEAupkFt/flL8uwzwiXemhydEVw5y/jQu1bAvklAL6LMjMG9z68 +YxaG8iduMpehxKXR75pWzZIqTm3sN0/3azUNECvx+Frf+5pCHcTeiGxfYaRWi7fB +cndMne3KXcRh42FRI7lAR4LDiP9pNld82cf3N9V/O2Y8G9fCTPAyjZP3sCgY9TGV +Q3AXSFkE+VjkT5qQlVewnixNU4l3OW9v9sDTjgXSj7g2AQxnT0oag/dSGl5iLPSh +VKOIxQRP1fiun3rFJ4LnZ6LinYRc0qJKF2yKRTcouS9k1EbUvXm8JtGZGs9sVvOg +yem0jLbjKoVA7CTmRZh4fDZ08Lkgz1FV4Zc22QIDAQABAoIBAGkkUFSZGksUO0xt +Su1ubQ+XEUczdJsBo4bJXFBPDZ/7oLEwaHZs+xz3muBnEH/9741TKhYrhisrRS7l +oESIYBP8rxuCGTNseFTN2ZaFejlKoHmZ0Sbukf1rP9wWDBJTg6TdfZrN0+AeCurT +4UXVpzeO1WJi+Pu3V4SC0/lypt5aw2F1urfoWSaUR43xiYpnjMNQ6dDvVoXA4R2X +lMvvdAimTyA3XFDQILlUz6UHH01nEDO6n3T7VjB8UxiJrV5Oyy/aREBIJRiEHf5t +dkZjVmtoKhAxKsOCyne/BZ3G1dYIGAhEM/SPqMQtPWy7U95ZaKQbF/Y5BhZb+5d6 +88HG6QECgYEA3VXddhNh8Ore1rrmlG/5/hwFg9BfP74Gt+lZcmT1Gwh9EBdcn3he +xn4kBiw3m1kYyJw3wUfg/zINerqPz57EV669aVaDOVXbqTsFHOsFa74wMERYfV+/ +eBn7lFdwxOXq4vfDMzq0Ph+wtFvA+C2IkQVk60PR94dJMTn5VLm26nsCgYEA19Jm +Hfvm/P/9oc4+rtkTUrs5BDHloBJ28TydZ84bI4B4n1/pJOWKrZ4y4kATic00+otW +sncOVAeFq7Nj8yJ1XRCxKnjbhR2q/FZQf8f0c5xVWh4iXRt6Zf5hVcCmkle8SV6M +vQb5zpRbzQTx+nrbut6RMbQPVHy5BIXhdzIeHbsCgYAik41bKr/8INTa+quWuL93 +AO2jn+OhU5A9HskIY9kedf8DioK/rtAvdfkuta2iKRMEE9Np8E6nzyvn5kkdCBJo +GDYixI8PX+hG0Z+E2von0Lg6chLY0yJYIsb4b4iAWeKNvmLSF/OcWNsD8el9W6+f +6BXR4vBkGNBITmQy5ig7DQKBgQCcfVLOKvkyOewOhx2sano4YsjU4dk+WCUmhm0b +97Z155GO/lxvBIGpoiwDIbMJGGJxyNb0UJ9zDoE+HrU6dqHi+Vd9FGUYAIsarPtx +q+r0aUb6MR95o5L8oZayNx6Qvk0oZgZmichYofpujkdm9+6bcQaWo5j6CfWd8fWq +GAz+QQKBgHBOyyzXC7HSy+IAu/Jo3kpkgTqjYUIsmig5QKamHo/5FP8FCq4ZVR1L +CYrpCVzbvjAjBnSm1/3UngjS3PPldUYjGIbez3gK/jJTfnzfsVghnQsZOd97YxuX +TusifzCTcDZEUIZSdxL72EpbGtkYqVeDl4SjU0ZMfSIyiEsfyDFw +-----END RSA PRIVATE KEY----- diff --git a/d2utmpa03344 b/d2utmpa03344 new file mode 100644 index 0000000..ed84c9f --- /dev/null +++ b/d2utmpa03344 @@ -0,0 +1,5 @@ +-----BEGIN EC PRIVATE KEY----- +MHcCAQEEIOrwk5LCELxzRGufJcI3ogOmaqYwNGYg0KIZqnQysKsPoAoGCCqGSM49 +AwEHoUQDQgAEXkGf9akhGRCleBfum8S5D11uWdOngABaPtFj7OHGk4u8gncSGf3g +uQj9j5MSCt9BV57GXKXgb0Xu0TH0wXbNqA== +-----END EC PRIVATE KEY----- diff --git a/d2utmpa03516 b/d2utmpa03516 new file mode 100644 index 0000000..d064585 --- /dev/null +++ b/d2utmpa03516 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC6mQW39+Uvy7DPCJd6aHJ0RXDnL+NC7VsC+SUAvosyMwb3PrxjFobyJ24yl6HEpdHvmlbNkipObew3T/drNQ0QK/H4Wt/7mkIdxN6IbF9hpFaLt8Fyd0yd7cpdxGHjYVEjuUBHgsOI/2k2V3zZx/c31X87Zjwb18JM8DKNk/ewKBj1MZVDcBdIWQT5WORPmpCVV7CeLE1TiXc5b2/2wNOOBdKPuDYBDGdPShqD91IaXmIs9KFUo4jFBE/V+K6fesUngudnouKdhFzSokoXbIpFNyi5L2TURtS9ebwm0Zkaz2xW86DJ6bSMtuMqhUDsJOZFmHh8NnTwuSDPUVXhlzbZ @oasis diff --git a/d2utmpa04376 b/d2utmpa04376 new file mode 100644 index 0000000..a7c1e5e --- /dev/null +++ b/d2utmpa04376 @@ -0,0 +1 @@ +ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOybqQdTc7bH8q7NxsBSFkZiyhzgafpiIVy66WzHiCzI @oasis diff --git a/d2utmpa04792 b/d2utmpa04792 new file mode 100644 index 0000000..58f8ff4 --- /dev/null +++ b/d2utmpa04792 @@ -0,0 +1 @@ +ssh-dss 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 @oasis diff --git a/d2utmpa04800 b/d2utmpa04800 new file mode 100644 index 0000000..58f8ff4 --- /dev/null +++ b/d2utmpa04800 @@ -0,0 +1 @@ +ssh-dss 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 @oasis diff --git a/d2utmpa05272 b/d2utmpa05272 new file mode 100644 index 0000000..c236aab --- /dev/null +++ b/d2utmpa05272 @@ -0,0 +1,12 @@ +-----BEGIN DSA PRIVATE KEY----- +MIIBuwIBAAKBgQC8GRz9p5YiVi9BA7jNO3MXV2NkPlMfCv2xjieBE6bflmHKoKhC +ewlyrk1SfLJQgVbOZvdrgtsuYGgKfpqu8qWlVnEHOLYSa6f6CDcjRXa5X+T2+tBZ +zYZ7UBlEFuDLoCEpSOopsDzPz+wvyGBH7/DPtHhbLB/ipIZYXMe/QXcyFwIVAIA9 +pz8MNAL+c9x9cNW9V40GIlnBAoGAWXg5YYAHb/+ZRHXBTTULmY8LT8Mhp8JDrIWY +TE+JHlFmGtHJsajoQNo5yFCj6ep1YqeKSZdj3x0JXSJDLLQNuiaGL74MdEasYt3g +rG04HE7k3tXfSwSM0cKhSFU/MKo9rhXStRcKdG5ZN4d+pTnoyV/ncfooiRJprqXH +l4yv2vMCgYEAp8OaX5N4UtY0KID34SNj5b3hsAoK5IZ3mBsX7Ngg6Rbnr7h2s5sK +sus5FiMtmymVssY84YZTRVP6oZWSShG/WOcUQrzo8zxKH9cj6pc/haSraTakSXLK +bbsI2Bj1nMYmXZxSelLUZS0Xwsp3EVxxLYmrzduXyV3ewvrHFZ1q6jsCFH3IbB4V +XAMosp5QzPxxeQQtAjVD +-----END DSA PRIVATE KEY----- diff --git a/d2utmpa06292 b/d2utmpa06292 new file mode 100644 index 0000000..d064585 --- /dev/null +++ b/d2utmpa06292 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC6mQW39+Uvy7DPCJd6aHJ0RXDnL+NC7VsC+SUAvosyMwb3PrxjFobyJ24yl6HEpdHvmlbNkipObew3T/drNQ0QK/H4Wt/7mkIdxN6IbF9hpFaLt8Fyd0yd7cpdxGHjYVEjuUBHgsOI/2k2V3zZx/c31X87Zjwb18JM8DKNk/ewKBj1MZVDcBdIWQT5WORPmpCVV7CeLE1TiXc5b2/2wNOOBdKPuDYBDGdPShqD91IaXmIs9KFUo4jFBE/V+K6fesUngudnouKdhFzSokoXbIpFNyi5L2TURtS9ebwm0Zkaz2xW86DJ6bSMtuMqhUDsJOZFmHh8NnTwuSDPUVXhlzbZ @oasis diff --git a/d2utmpa06444 b/d2utmpa06444 new file mode 100644 index 0000000..ed84c9f --- /dev/null +++ b/d2utmpa06444 @@ -0,0 +1,5 @@ +-----BEGIN EC PRIVATE KEY----- +MHcCAQEEIOrwk5LCELxzRGufJcI3ogOmaqYwNGYg0KIZqnQysKsPoAoGCCqGSM49 +AwEHoUQDQgAEXkGf9akhGRCleBfum8S5D11uWdOngABaPtFj7OHGk4u8gncSGf3g +uQj9j5MSCt9BV57GXKXgb0Xu0TH0wXbNqA== +-----END EC PRIVATE KEY----- diff --git a/d2utmpa07284 b/d2utmpa07284 new file mode 100644 index 0000000..c236aab --- /dev/null +++ b/d2utmpa07284 @@ -0,0 +1,12 @@ +-----BEGIN DSA PRIVATE KEY----- +MIIBuwIBAAKBgQC8GRz9p5YiVi9BA7jNO3MXV2NkPlMfCv2xjieBE6bflmHKoKhC +ewlyrk1SfLJQgVbOZvdrgtsuYGgKfpqu8qWlVnEHOLYSa6f6CDcjRXa5X+T2+tBZ +zYZ7UBlEFuDLoCEpSOopsDzPz+wvyGBH7/DPtHhbLB/ipIZYXMe/QXcyFwIVAIA9 +pz8MNAL+c9x9cNW9V40GIlnBAoGAWXg5YYAHb/+ZRHXBTTULmY8LT8Mhp8JDrIWY +TE+JHlFmGtHJsajoQNo5yFCj6ep1YqeKSZdj3x0JXSJDLLQNuiaGL74MdEasYt3g +rG04HE7k3tXfSwSM0cKhSFU/MKo9rhXStRcKdG5ZN4d+pTnoyV/ncfooiRJprqXH +l4yv2vMCgYEAp8OaX5N4UtY0KID34SNj5b3hsAoK5IZ3mBsX7Ngg6Rbnr7h2s5sK +sus5FiMtmymVssY84YZTRVP6oZWSShG/WOcUQrzo8zxKH9cj6pc/haSraTakSXLK +bbsI2Bj1nMYmXZxSelLUZS0Xwsp3EVxxLYmrzduXyV3ewvrHFZ1q6jsCFH3IbB4V +XAMosp5QzPxxeQQtAjVD +-----END DSA PRIVATE KEY----- diff --git a/d2utmpa07336 b/d2utmpa07336 new file mode 100644 index 0000000..4e8153f --- /dev/null +++ b/d2utmpa07336 @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCci4oy7TlKHy9d8+4slhm66MzE9haGbasI3Wwt6LqrvK6X0jtVCA+04nBWoBH7m+8UJrd6mqldSsOVETiZFLm4sNl95MmKirWHmoSeJy12wyovQXYkyYRH0T4J2lDna6JbgCPuaZpgIq88sxb/Z8RVf9fjStd6aNIyM95BalRnL839mYJxXpfPNMBkXGED3w/m5S6GgxX8VrP1cC6N+kXao5nyctZqFZAQbtj122LAeFNWN6W0Ehy5mx1VETFII+h9vSJ2LwDNHNrYBPV2IOtJ/tQ8ajSoc60bNvJjJtgld/he3KlmrgjtKcC4Akr1Bmegm+iI4pg2VgUnpocTdDfb @oasis diff --git a/d2utmpa08080 b/d2utmpa08080 new file mode 100644 index 0000000..c58bc9d --- /dev/null +++ b/d2utmpa08080 @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEowIBAAKCAQEAupkFt/flL8uwzwiXemhydEVw5y/jQu1bAvklAL6LMjMG9z68 +YxaG8iduMpehxKXR75pWzZIqTm3sN0/3azUNECvx+Frf+5pCHcTeiGxfYaRWi7fB +cndMne3KXcRh42FRI7lAR4LDiP9pNld82cf3N9V/O2Y8G9fCTPAyjZP3sCgY9TGV +Q3AXSFkE+VjkT5qQlVewnixNU4l3OW9v9sDTjgXSj7g2AQxnT0oag/dSGl5iLPSh +VKOIxQRP1fiun3rFJ4LnZ6LinYRc0qJKF2yKRTcouS9k1EbUvXm8JtGZGs9sVvOg +yem0jLbjKoVA7CTmRZh4fDZ08Lkgz1FV4Zc22QIDAQABAoIBAGkkUFSZGksUO0xt +Su1ubQ+XEUczdJsBo4bJXFBPDZ/7oLEwaHZs+xz3muBnEH/9741TKhYrhisrRS7l +oESIYBP8rxuCGTNseFTN2ZaFejlKoHmZ0Sbukf1rP9wWDBJTg6TdfZrN0+AeCurT +4UXVpzeO1WJi+Pu3V4SC0/lypt5aw2F1urfoWSaUR43xiYpnjMNQ6dDvVoXA4R2X +lMvvdAimTyA3XFDQILlUz6UHH01nEDO6n3T7VjB8UxiJrV5Oyy/aREBIJRiEHf5t +dkZjVmtoKhAxKsOCyne/BZ3G1dYIGAhEM/SPqMQtPWy7U95ZaKQbF/Y5BhZb+5d6 +88HG6QECgYEA3VXddhNh8Ore1rrmlG/5/hwFg9BfP74Gt+lZcmT1Gwh9EBdcn3he +xn4kBiw3m1kYyJw3wUfg/zINerqPz57EV669aVaDOVXbqTsFHOsFa74wMERYfV+/ +eBn7lFdwxOXq4vfDMzq0Ph+wtFvA+C2IkQVk60PR94dJMTn5VLm26nsCgYEA19Jm +Hfvm/P/9oc4+rtkTUrs5BDHloBJ28TydZ84bI4B4n1/pJOWKrZ4y4kATic00+otW +sncOVAeFq7Nj8yJ1XRCxKnjbhR2q/FZQf8f0c5xVWh4iXRt6Zf5hVcCmkle8SV6M 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+AAAECGe69spV/5acdoNqiARzB79o5ASCy2SQ6Ng7SWENmDguybqQdTc7bH8q7NxsBSFkZi +yhzgafpiIVy66WzHiCzIAAAABkBvYXNpcwECAwQFBgc= +-----END OPENSSH PRIVATE KEY----- diff --git a/d2utmpa08916 b/d2utmpa08916 new file mode 100644 index 0000000..e23f76c --- /dev/null +++ b/d2utmpa08916 @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpQIBAAKCAQEAnIuKMu05Sh8vXfPuLJYZuujMxPYWhm2rCN1sLei6q7yul9I7 +VQgPtOJwVqAR+5vvFCa3epqpXUrDlRE4mRS5uLDZfeTJioq1h5qEnictdsMqL0F2 +JMmER9E+CdpQ52uiW4Aj7mmaYCKvPLMW/2fEVX/X40rXemjSMjPeQWpUZy/N/ZmC +cV6XzzTAZFxhA98P5uUuhoMV/Faz9XAujfpF2qOZ8nLWahWQEG7Y9dtiwHhTVjel +tBIcuZsdVRExSCPofb0idi8AzRza2AT1diDrSf7UPGo0qHOtGzbyYybYJXf4Xtyp +Zq4I7SnAuAJK9QZnoJvoiOKYNlYFJ6aHE3Q32wIDAQABAoIBAAg70qYBEi1S3JPt +e45+ypWpHvQRGXgylndd5g24GvFjeC9mEFbVmLXj3xK/UpLQTc/ahXX+YoAUqZrS +kA6FJ4uOSbI0cWFHEGs0dls3Jk4Dz9kycTtYGgwI9mFgSTcS0zRK1hj5FvSNfngL +117Rn2L72WgMDK9UihG35q28IPpYVUTN7W+qU5YdG9m5KutBjmq9lStc6eeHqMYH +EBo3WwMh43oBhcqbebowgQLIkQTcnVdDwsjT8GYEI7onH4SnQWapch7ogXERu34w +SDNhcQ5N4gSV/Urj5+RuA78s3eKb3zZMW3lLvmr4re6BZWa/E6XmYq8k2KAB12TX +5QaYqnECgYEAzlhlLMPXuOqcQp1O1TyVNxWwJ9Q8TqhLjnbFASLCzFU2E0lup0mH +2wK0cL8KhljT6rYzKFFp2ik5+1TzHKxEvnyzB89IJ3z/5e0AYssyv1oRnzMx9amg ++04BxP4iAo1Fs9xN60PhsjHfIBj8jH3EJcla0G/zY0JE510cDRCa/YkCgYEAwjdG +JBjva6vgwZiiZ5QoOmH0WIsOnNB5VjzOONXUrpYSNMBDGougnt9eOeyUbAGgPBLT +10eR9oR06DLacn/jw75u07NCBfqxTSdW+xziG54DnK24vONBS4KmbA/v4u1mMaIn +OxRfx++3lcOvrMeUqjA5ZrUUW5VXV/dNg0IStUMCgYEAxSEptzR6GMz576H9ODYi +j3eGzOYznymk1TueRdGBrFgTyyUyM1tKEO9qlvPMCEFAY1EhWnk82RDdtcCYaWIi +YqEbIHDki+UdS/m5jqh1mN1hTGhKaFlf0/XYNuxabXmth4EGZ6Z4Lhb7BN0aGNXl +1/ufaNYq/T7IOQh4zfp5N5ECgYEAgcpYmIUFc4owsJAlcF0FqUaO+aEsicWUYPpP +wpG8CVSHJDOcZKANHj8eBE3DPo6zm5Hlekf9FqacThS2AbDP8J9SBy4ToFVRqcLx +kO1TeatWtJ0wCSNCHolYWH0qDhgipGa+GvBZtg7QPEjDHQ9fnYCOy8GVskKSVVoS +tfYw9GsCgYEAjhgQ2pedGUGHdRY8upI7iQkGIAjsmNKExIIc7oPCiFO5d23XXsuV +lNjHie84Ty7mimuGn9kCX0GzJAHOJBV1cVAannZ+SA+PxcsIez3wAt1KxQIkfw6o +3vzanOICnGhZ22SFyib1h+0OveVXshJc3DeWlgiDxQN2Ox8BUN2KBFs= +-----END RSA PRIVATE KEY----- diff --git a/d2utmpa09000 b/d2utmpa09000 new file mode 100644 index 0000000..e23f76c --- /dev/null +++ b/d2utmpa09000 @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpQIBAAKCAQEAnIuKMu05Sh8vXfPuLJYZuujMxPYWhm2rCN1sLei6q7yul9I7 +VQgPtOJwVqAR+5vvFCa3epqpXUrDlRE4mRS5uLDZfeTJioq1h5qEnictdsMqL0F2 +JMmER9E+CdpQ52uiW4Aj7mmaYCKvPLMW/2fEVX/X40rXemjSMjPeQWpUZy/N/ZmC +cV6XzzTAZFxhA98P5uUuhoMV/Faz9XAujfpF2qOZ8nLWahWQEG7Y9dtiwHhTVjel +tBIcuZsdVRExSCPofb0idi8AzRza2AT1diDrSf7UPGo0qHOtGzbyYybYJXf4Xtyp +Zq4I7SnAuAJK9QZnoJvoiOKYNlYFJ6aHE3Q32wIDAQABAoIBAAg70qYBEi1S3JPt +e45+ypWpHvQRGXgylndd5g24GvFjeC9mEFbVmLXj3xK/UpLQTc/ahXX+YoAUqZrS +kA6FJ4uOSbI0cWFHEGs0dls3Jk4Dz9kycTtYGgwI9mFgSTcS0zRK1hj5FvSNfngL +117Rn2L72WgMDK9UihG35q28IPpYVUTN7W+qU5YdG9m5KutBjmq9lStc6eeHqMYH +EBo3WwMh43oBhcqbebowgQLIkQTcnVdDwsjT8GYEI7onH4SnQWapch7ogXERu34w +SDNhcQ5N4gSV/Urj5+RuA78s3eKb3zZMW3lLvmr4re6BZWa/E6XmYq8k2KAB12TX +5QaYqnECgYEAzlhlLMPXuOqcQp1O1TyVNxWwJ9Q8TqhLjnbFASLCzFU2E0lup0mH 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@@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpQIBAAKCAQEAnIuKMu05Sh8vXfPuLJYZuujMxPYWhm2rCN1sLei6q7yul9I7 +VQgPtOJwVqAR+5vvFCa3epqpXUrDlRE4mRS5uLDZfeTJioq1h5qEnictdsMqL0F2 +JMmER9E+CdpQ52uiW4Aj7mmaYCKvPLMW/2fEVX/X40rXemjSMjPeQWpUZy/N/ZmC +cV6XzzTAZFxhA98P5uUuhoMV/Faz9XAujfpF2qOZ8nLWahWQEG7Y9dtiwHhTVjel +tBIcuZsdVRExSCPofb0idi8AzRza2AT1diDrSf7UPGo0qHOtGzbyYybYJXf4Xtyp +Zq4I7SnAuAJK9QZnoJvoiOKYNlYFJ6aHE3Q32wIDAQABAoIBAAg70qYBEi1S3JPt +e45+ypWpHvQRGXgylndd5g24GvFjeC9mEFbVmLXj3xK/UpLQTc/ahXX+YoAUqZrS +kA6FJ4uOSbI0cWFHEGs0dls3Jk4Dz9kycTtYGgwI9mFgSTcS0zRK1hj5FvSNfngL +117Rn2L72WgMDK9UihG35q28IPpYVUTN7W+qU5YdG9m5KutBjmq9lStc6eeHqMYH +EBo3WwMh43oBhcqbebowgQLIkQTcnVdDwsjT8GYEI7onH4SnQWapch7ogXERu34w +SDNhcQ5N4gSV/Urj5+RuA78s3eKb3zZMW3lLvmr4re6BZWa/E6XmYq8k2KAB12TX +5QaYqnECgYEAzlhlLMPXuOqcQp1O1TyVNxWwJ9Q8TqhLjnbFASLCzFU2E0lup0mH +2wK0cL8KhljT6rYzKFFp2ik5+1TzHKxEvnyzB89IJ3z/5e0AYssyv1oRnzMx9amg ++04BxP4iAo1Fs9xN60PhsjHfIBj8jH3EJcla0G/zY0JE510cDRCa/YkCgYEAwjdG +JBjva6vgwZiiZ5QoOmH0WIsOnNB5VjzOONXUrpYSNMBDGougnt9eOeyUbAGgPBLT +10eR9oR06DLacn/jw75u07NCBfqxTSdW+xziG54DnK24vONBS4KmbA/v4u1mMaIn +OxRfx++3lcOvrMeUqjA5ZrUUW5VXV/dNg0IStUMCgYEAxSEptzR6GMz576H9ODYi +j3eGzOYznymk1TueRdGBrFgTyyUyM1tKEO9qlvPMCEFAY1EhWnk82RDdtcCYaWIi +YqEbIHDki+UdS/m5jqh1mN1hTGhKaFlf0/XYNuxabXmth4EGZ6Z4Lhb7BN0aGNXl +1/ufaNYq/T7IOQh4zfp5N5ECgYEAgcpYmIUFc4owsJAlcF0FqUaO+aEsicWUYPpP +wpG8CVSHJDOcZKANHj8eBE3DPo6zm5Hlekf9FqacThS2AbDP8J9SBy4ToFVRqcLx +kO1TeatWtJ0wCSNCHolYWH0qDhgipGa+GvBZtg7QPEjDHQ9fnYCOy8GVskKSVVoS +tfYw9GsCgYEAjhgQ2pedGUGHdRY8upI7iQkGIAjsmNKExIIc7oPCiFO5d23XXsuV +lNjHie84Ty7mimuGn9kCX0GzJAHOJBV1cVAannZ+SA+PxcsIez3wAt1KxQIkfw6o +3vzanOICnGhZ22SFyib1h+0OveVXshJc3DeWlgiDxQN2Ox8BUN2KBFs= +-----END RSA PRIVATE KEY----- diff --git a/d2utmpa09244 b/d2utmpa09244 new file mode 100644 index 0000000..ed84c9f --- /dev/null +++ b/d2utmpa09244 @@ -0,0 +1,5 @@ +-----BEGIN EC PRIVATE KEY----- +MHcCAQEEIOrwk5LCELxzRGufJcI3ogOmaqYwNGYg0KIZqnQysKsPoAoGCCqGSM49 +AwEHoUQDQgAEXkGf9akhGRCleBfum8S5D11uWdOngABaPtFj7OHGk4u8gncSGf3g +uQj9j5MSCt9BV57GXKXgb0Xu0TH0wXbNqA== +-----END EC PRIVATE KEY----- diff --git a/d2utmpa09344 b/d2utmpa09344 new file mode 100644 index 0000000..281890d --- /dev/null +++ b/d2utmpa09344 @@ -0,0 +1,7 @@ +-----BEGIN OPENSSH PRIVATE KEY----- +b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW +QyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyAAAAJAJSj5MCUo+ +TAAAAAtzc2gtZWQyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyA +AAAECGe69spV/5acdoNqiARzB79o5ASCy2SQ6Ng7SWENmDguybqQdTc7bH8q7NxsBSFkZi +yhzgafpiIVy66WzHiCzIAAAABkBvYXNpcwECAwQFBgc= +-----END OPENSSH PRIVATE KEY----- diff --git a/d2utmpa09348 b/d2utmpa09348 new file mode 100644 index 0000000..c58bc9d --- /dev/null +++ b/d2utmpa09348 @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEowIBAAKCAQEAupkFt/flL8uwzwiXemhydEVw5y/jQu1bAvklAL6LMjMG9z68 +YxaG8iduMpehxKXR75pWzZIqTm3sN0/3azUNECvx+Frf+5pCHcTeiGxfYaRWi7fB +cndMne3KXcRh42FRI7lAR4LDiP9pNld82cf3N9V/O2Y8G9fCTPAyjZP3sCgY9TGV +Q3AXSFkE+VjkT5qQlVewnixNU4l3OW9v9sDTjgXSj7g2AQxnT0oag/dSGl5iLPSh +VKOIxQRP1fiun3rFJ4LnZ6LinYRc0qJKF2yKRTcouS9k1EbUvXm8JtGZGs9sVvOg +yem0jLbjKoVA7CTmRZh4fDZ08Lkgz1FV4Zc22QIDAQABAoIBAGkkUFSZGksUO0xt +Su1ubQ+XEUczdJsBo4bJXFBPDZ/7oLEwaHZs+xz3muBnEH/9741TKhYrhisrRS7l +oESIYBP8rxuCGTNseFTN2ZaFejlKoHmZ0Sbukf1rP9wWDBJTg6TdfZrN0+AeCurT +4UXVpzeO1WJi+Pu3V4SC0/lypt5aw2F1urfoWSaUR43xiYpnjMNQ6dDvVoXA4R2X +lMvvdAimTyA3XFDQILlUz6UHH01nEDO6n3T7VjB8UxiJrV5Oyy/aREBIJRiEHf5t +dkZjVmtoKhAxKsOCyne/BZ3G1dYIGAhEM/SPqMQtPWy7U95ZaKQbF/Y5BhZb+5d6 +88HG6QECgYEA3VXddhNh8Ore1rrmlG/5/hwFg9BfP74Gt+lZcmT1Gwh9EBdcn3he +xn4kBiw3m1kYyJw3wUfg/zINerqPz57EV669aVaDOVXbqTsFHOsFa74wMERYfV+/ +eBn7lFdwxOXq4vfDMzq0Ph+wtFvA+C2IkQVk60PR94dJMTn5VLm26nsCgYEA19Jm +Hfvm/P/9oc4+rtkTUrs5BDHloBJ28TydZ84bI4B4n1/pJOWKrZ4y4kATic00+otW +sncOVAeFq7Nj8yJ1XRCxKnjbhR2q/FZQf8f0c5xVWh4iXRt6Zf5hVcCmkle8SV6M +vQb5zpRbzQTx+nrbut6RMbQPVHy5BIXhdzIeHbsCgYAik41bKr/8INTa+quWuL93 +AO2jn+OhU5A9HskIY9kedf8DioK/rtAvdfkuta2iKRMEE9Np8E6nzyvn5kkdCBJo +GDYixI8PX+hG0Z+E2von0Lg6chLY0yJYIsb4b4iAWeKNvmLSF/OcWNsD8el9W6+f +6BXR4vBkGNBITmQy5ig7DQKBgQCcfVLOKvkyOewOhx2sano4YsjU4dk+WCUmhm0b +97Z155GO/lxvBIGpoiwDIbMJGGJxyNb0UJ9zDoE+HrU6dqHi+Vd9FGUYAIsarPtx +q+r0aUb6MR95o5L8oZayNx6Qvk0oZgZmichYofpujkdm9+6bcQaWo5j6CfWd8fWq +GAz+QQKBgHBOyyzXC7HSy+IAu/Jo3kpkgTqjYUIsmig5QKamHo/5FP8FCq4ZVR1L +CYrpCVzbvjAjBnSm1/3UngjS3PPldUYjGIbez3gK/jJTfnzfsVghnQsZOd97YxuX +TusifzCTcDZEUIZSdxL72EpbGtkYqVeDl4SjU0ZMfSIyiEsfyDFw +-----END RSA PRIVATE KEY----- diff --git a/d2utmpa09960 b/d2utmpa09960 new file mode 100644 index 0000000..a7c1e5e --- /dev/null +++ b/d2utmpa09960 @@ -0,0 +1 @@ +ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOybqQdTc7bH8q7NxsBSFkZiyhzgafpiIVy66WzHiCzI @oasis diff --git a/d2utmpa10036 b/d2utmpa10036 new file mode 100644 index 0000000..a7c1e5e --- /dev/null +++ b/d2utmpa10036 @@ -0,0 +1 @@ +ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOybqQdTc7bH8q7NxsBSFkZiyhzgafpiIVy66WzHiCzI @oasis diff --git a/deattack.c b/deattack.c index 1b37e4d..e76481a 100644 --- a/deattack.c +++ b/deattack.c @@ -1,4 +1,4 @@ -/* $OpenBSD: deattack.c,v 1.30 2006/09/16 19:53:37 djm Exp $ */ +/* $OpenBSD: deattack.c,v 1.32 2015/01/20 23:14:00 deraadt Exp $ */ /* * Cryptographic attack detector for ssh - source code * @@ -20,16 +20,13 @@ #include "includes.h" -#include - #include #include -#include +#include -#include "xmalloc.h" #include "deattack.h" -#include "log.h" #include "crc32.h" +#include "sshbuf.h" #include "misc.h" /* @@ -66,7 +63,7 @@ /* Hash function (Input keys are cipher results) */ -#define HASH(x) get_u32(x) +#define HASH(x) PEEK_U32(x) #define CMP(a, b) (memcmp(a, b, SSH_BLOCKSIZE)) @@ -79,10 +76,10 @@ crc_update(u_int32_t *a, u_int32_t b) /* detect if a block is used in a particular pattern */ static int -check_crc(u_char *S, u_char *buf, u_int32_t len) +check_crc(const u_char *S, const u_char *buf, u_int32_t len) { u_int32_t crc; - u_char *c; + const u_char *c; crc = 0; for (c = buf; c < buf + len; c += SSH_BLOCKSIZE) { @@ -94,36 +91,44 @@ check_crc(u_char *S, u_char *buf, u_int32_t len) crc_update(&crc, 0); } } - return (crc == 0); + return crc == 0; } +void +deattack_init(struct deattack_ctx *dctx) +{ + bzero(dctx, sizeof(*dctx)); + dctx->n = HASH_MINSIZE / HASH_ENTRYSIZE; +} /* Detect a crc32 compensation attack on a packet */ int -detect_attack(u_char *buf, u_int32_t len) +detect_attack(struct deattack_ctx *dctx, const u_char *buf, u_int32_t len) { - static u_int16_t *h = (u_int16_t *) NULL; - static u_int32_t n = HASH_MINSIZE / HASH_ENTRYSIZE; - u_int32_t i, j; - u_int32_t l, same; - u_char *c; - u_char *d; + u_int32_t i, j, l, same; + u_int16_t *tmp; + const u_char *c, *d; if (len > (SSH_MAXBLOCKS * SSH_BLOCKSIZE) || - len % SSH_BLOCKSIZE != 0) { - fatal("detect_attack: bad length %d", len); - } - for (l = n; l < HASH_FACTOR(len / SSH_BLOCKSIZE); l = l << 2) + len % SSH_BLOCKSIZE != 0) + return DEATTACK_ERROR; + for (l = dctx->n; l < HASH_FACTOR(len / SSH_BLOCKSIZE); l = l << 2) ; - if (h == NULL) { - debug("Installing crc compensation attack detector."); - h = (u_int16_t *) xcalloc(l, HASH_ENTRYSIZE); - n = l; + if (dctx->h == NULL) { + if ((dctx->h = calloc(l, HASH_ENTRYSIZE)) == NULL) + return DEATTACK_ERROR; + dctx->n = l; } else { - if (l > n) { - h = (u_int16_t *)xrealloc(h, l, HASH_ENTRYSIZE); - n = l; + if (l > dctx->n) { + if ((tmp = reallocarray(dctx->h, l, HASH_ENTRYSIZE)) + == NULL) { + free(dctx->h); + dctx->h = NULL; + return DEATTACK_ERROR; + } + dctx->h = tmp; + dctx->n = l; } } @@ -132,29 +137,29 @@ detect_attack(u_char *buf, u_int32_t len) for (d = buf; d < c; d += SSH_BLOCKSIZE) { if (!CMP(c, d)) { if ((check_crc(c, buf, len))) - return (DEATTACK_DETECTED); + return DEATTACK_DETECTED; else break; } } } - return (DEATTACK_OK); + return DEATTACK_OK; } - memset(h, HASH_UNUSEDCHAR, n * HASH_ENTRYSIZE); + memset(dctx->h, HASH_UNUSEDCHAR, dctx->n * HASH_ENTRYSIZE); for (c = buf, same = j = 0; c < (buf + len); c += SSH_BLOCKSIZE, j++) { - for (i = HASH(c) & (n - 1); h[i] != HASH_UNUSED; - i = (i + 1) & (n - 1)) { - if (!CMP(c, buf + h[i] * SSH_BLOCKSIZE)) { + for (i = HASH(c) & (dctx->n - 1); dctx->h[i] != HASH_UNUSED; + i = (i + 1) & (dctx->n - 1)) { + if (!CMP(c, buf + dctx->h[i] * SSH_BLOCKSIZE)) { if (++same > MAX_IDENTICAL) - return (DEATTACK_DOS_DETECTED); + return DEATTACK_DOS_DETECTED; if (check_crc(c, buf, len)) - return (DEATTACK_DETECTED); + return DEATTACK_DETECTED; else break; } } - h[i] = j; + dctx->h[i] = j; } - return (DEATTACK_OK); + return DEATTACK_OK; } diff --git a/deattack.h b/deattack.h index 0316fb2..ce67a30 100644 --- a/deattack.h +++ b/deattack.h @@ -1,4 +1,4 @@ -/* $OpenBSD: deattack.h,v 1.10 2006/09/16 19:53:37 djm Exp $ */ +/* $OpenBSD: deattack.h,v 1.11 2015/01/19 19:52:16 markus Exp $ */ /* * Cryptographic attack detector for ssh - Header file @@ -26,6 +26,13 @@ #define DEATTACK_OK 0 #define DEATTACK_DETECTED 1 #define DEATTACK_DOS_DETECTED 2 +#define DEATTACK_ERROR 3 -int detect_attack(u_char *, u_int32_t); +struct deattack_ctx { + u_int16_t *h; + u_int32_t n; +}; + +void deattack_init(struct deattack_ctx *); +int detect_attack(struct deattack_ctx *, const u_char *, u_int32_t); #endif diff --git a/defines.h b/defines.h index f8531d4..14b3bc3 100644 --- a/defines.h +++ b/defines.h @@ -25,7 +25,7 @@ #ifndef _DEFINES_H #define _DEFINES_H -/* $Id: defines.h,v 1.167 2011/06/03 01:17:49 tim Exp $ */ +/* $Id: defines.h,v 1.183 2014/09/02 19:33:26 djm Exp $ */ /* Constants */ @@ -87,6 +87,12 @@ enum # define IPTOS_DSCP_EF 0xb8 #endif /* IPTOS_DSCP_EF */ +#ifndef PATH_MAX +# ifdef _POSIX_PATH_MAX +# define PATH_MAX _POSIX_PATH_MAX +# endif +#endif + #ifndef MAXPATHLEN # ifdef PATH_MAX # define MAXPATHLEN PATH_MAX @@ -99,11 +105,16 @@ enum # endif /* PATH_MAX */ #endif /* MAXPATHLEN */ -#ifndef PATH_MAX -# ifdef _POSIX_PATH_MAX -# define PATH_MAX _POSIX_PATH_MAX +#ifndef HOST_NAME_MAX +# include "netdb.h" /* for MAXHOSTNAMELEN */ +# if defined(_POSIX_HOST_NAME_MAX) +# define HOST_NAME_MAX _POSIX_HOST_NAME_MAX +# elif defined(MAXHOSTNAMELEN) +# define HOST_NAME_MAX MAXHOSTNAMELEN +# else +# define HOST_NAME_MAX 255 # endif -#endif +#endif /* HOST_NAME_MAX */ #if defined(HAVE_DECL_MAXSYMLINKS) && HAVE_DECL_MAXSYMLINKS == 0 # define MAXSYMLINKS 5 @@ -171,11 +182,6 @@ enum # define MAP_FAILED ((void *)-1) #endif -/* *-*-nto-qnx doesn't define this constant in the system headers */ -#ifdef MISSING_NFDBITS -# define NFDBITS (8 * sizeof(unsigned long)) -#endif - /* SCO Open Server 3 has INADDR_LOOPBACK defined in rpc/rpc.h but including rpc/rpc.h breaks Solaris 6 @@ -194,11 +200,7 @@ typedef unsigned int u_int; #endif #ifndef HAVE_INTXX_T -# if (SIZEOF_CHAR == 1) -typedef char int8_t; -# else -# error "8 bit int type not found." -# endif +typedef signed char int8_t; # if (SIZEOF_SHORT_INT == 2) typedef short int int16_t; # else @@ -231,11 +233,7 @@ typedef uint16_t u_int16_t; typedef uint32_t u_int32_t; # define HAVE_U_INTXX_T 1 # else -# if (SIZEOF_CHAR == 1) typedef unsigned char u_int8_t; -# else -# error "8 bit int type not found." -# endif # if (SIZEOF_SHORT_INT == 2) typedef unsigned short int u_int16_t; # else @@ -282,11 +280,30 @@ typedef unsigned long long int u_int64_t; # endif #endif +#ifndef HAVE_UINTXX_T +typedef u_int8_t uint8_t; +typedef u_int16_t uint16_t; +typedef u_int32_t uint32_t; +typedef u_int64_t uint64_t; +#endif + +#ifndef HAVE_INTMAX_T +typedef long long intmax_t; +#endif + +#ifndef HAVE_UINTMAX_T +typedef unsigned long long uintmax_t; +#endif + #ifndef HAVE_U_CHAR typedef unsigned char u_char; # define HAVE_U_CHAR #endif /* HAVE_U_CHAR */ +#ifndef ULLONG_MAX +# define ULLONG_MAX ((unsigned long long)-1) +#endif + #ifndef SIZE_T_MAX #define SIZE_T_MAX ULONG_MAX #endif /* SIZE_T_MAX */ @@ -359,11 +376,19 @@ struct winsize { }; #endif -/* *-*-nto-qnx does not define this type in the system headers */ -#ifdef MISSING_FD_MASK +/* bits needed for select that may not be in the system headers */ +#ifndef HAVE_FD_MASK typedef unsigned long int fd_mask; #endif +#if defined(HAVE_DECL_NFDBITS) && HAVE_DECL_NFDBITS == 0 +# define NFDBITS (8 * sizeof(unsigned long)) +#endif + +#if defined(HAVE_DECL_HOWMANY) && HAVE_DECL_HOWMANY == 0 +# define howmany(x,y) (((x)+((y)-1))/(y)) +#endif + /* Paths */ #ifndef _PATH_BSHELL @@ -391,7 +416,7 @@ struct winsize { /* user may have set a different path */ #if defined(_PATH_MAILDIR) && defined(MAIL_DIRECTORY) -# undef _PATH_MAILDIR MAILDIR +# undef _PATH_MAILDIR #endif /* defined(_PATH_MAILDIR) && defined(MAIL_DIRECTORY) */ #ifdef MAIL_DIRECTORY @@ -488,11 +513,6 @@ struct winsize { # define __nonnull__(x) #endif -/* *-*-nto-qnx doesn't define this macro in the system headers */ -#ifdef MISSING_HOWMANY -# define howmany(x,y) (((x)+((y)-1))/(y)) -#endif - #ifndef OSSH_ALIGNBYTES #define OSSH_ALIGNBYTES (sizeof(int) - 1) #endif @@ -577,6 +597,12 @@ struct winsize { # undef HAVE_GAI_STRERROR #endif +#if defined(HAVE_GETADDRINFO) +# if defined(HAVE_DECL_AI_NUMERICSERV) && HAVE_DECL_AI_NUMERICSERV == 0 +# define AI_NUMERICSERV 0 +# endif +#endif + #if defined(BROKEN_UPDWTMPX) && defined(HAVE_UPDWTMPX) # undef HAVE_UPDWTMPX #endif @@ -594,10 +620,6 @@ struct winsize { # define memmove(s1, s2, n) bcopy((s2), (s1), (n)) #endif /* !defined(HAVE_MEMMOVE) && defined(HAVE_BCOPY) */ -#if defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX) -# define USE_VHANGUP -#endif /* defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX) */ - #ifndef GETPGRP_VOID # include # define getpgrp() getpgrp(0) @@ -800,14 +822,34 @@ struct winsize { # define SSH_IOBUFSZ 8192 #endif -#ifndef _NSIG -# ifdef NSIG -# define _NSIG NSIG +/* + * Platforms that have arc4random_uniform() and not arc4random_stir() + * shouldn't need the latter. + */ +#if defined(HAVE_ARC4RANDOM) && defined(HAVE_ARC4RANDOM_UNIFORM) && \ + !defined(HAVE_ARC4RANDOM_STIR) +# define arc4random_stir() +#endif + +#ifndef HAVE_VA_COPY +# ifdef HAVE___VA_COPY +# define va_copy(dest, src) __va_copy(dest, src) # else -# define _NSIG 128 +# define va_copy(dest, src) (dest) = (src) # endif #endif +#ifndef __predict_true +# if defined(__GNUC__) && \ + ((__GNUC__ > (2)) || (__GNUC__ == (2) && __GNUC_MINOR__ >= (96))) +# define __predict_true(exp) __builtin_expect(((exp) != 0), 1) +# define __predict_false(exp) __builtin_expect(((exp) != 0), 0) +# else +# define __predict_true(exp) ((exp) != 0) +# define __predict_false(exp) ((exp) != 0) +# endif /* gcc version */ +#endif /* __predict_true */ + /* WIN32_FIXME */ #ifdef _WIN32 # define CUSTOM_SYS_AUTH_PASSWD 1 diff --git a/dh.c b/dh.c index b9029d8..4c639ac 100644 --- a/dh.c +++ b/dh.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dh.c,v 1.48 2009/10/01 11:37:33 grunk Exp $ */ +/* $OpenBSD: dh.c,v 1.57 2015/05/27 23:39:18 dtucker Exp $ */ /* * Copyright (c) 2000 Niels Provos. All rights reserved. * @@ -25,7 +25,7 @@ #include "includes.h" -#include +#include /* MIN */ #include #include @@ -34,11 +34,13 @@ #include #include #include +#include #include "dh.h" #include "pathnames.h" #include "log.h" #include "misc.h" +#include "ssherr.h" static int parse_prime(int linenum, char *line, struct dhgroup *dhg) @@ -48,6 +50,7 @@ parse_prime(int linenum, char *line, struct dhgroup *dhg) const char *errstr = NULL; long long n; + dhg->p = dhg->g = NULL; cp = line; if ((arg = strdelim(&cp)) == NULL) return 0; @@ -59,66 +62,84 @@ parse_prime(int linenum, char *line, struct dhgroup *dhg) /* time */ if (cp == NULL || *arg == '\0') - goto fail; + goto truncated; arg = strsep(&cp, " "); /* type */ if (cp == NULL || *arg == '\0') - goto fail; + goto truncated; /* Ensure this is a safe prime */ n = strtonum(arg, 0, 5, &errstr); - if (errstr != NULL || n != MODULI_TYPE_SAFE) + if (errstr != NULL || n != MODULI_TYPE_SAFE) { + error("moduli:%d: type is not %d", linenum, MODULI_TYPE_SAFE); goto fail; + } arg = strsep(&cp, " "); /* tests */ if (cp == NULL || *arg == '\0') - goto fail; + goto truncated; /* Ensure prime has been tested and is not composite */ n = strtonum(arg, 0, 0x1f, &errstr); if (errstr != NULL || - (n & MODULI_TESTS_COMPOSITE) || !(n & ~MODULI_TESTS_COMPOSITE)) + (n & MODULI_TESTS_COMPOSITE) || !(n & ~MODULI_TESTS_COMPOSITE)) { + error("moduli:%d: invalid moduli tests flag", linenum); goto fail; + } arg = strsep(&cp, " "); /* tries */ if (cp == NULL || *arg == '\0') - goto fail; + goto truncated; n = strtonum(arg, 0, 1<<30, &errstr); - if (errstr != NULL || n == 0) + if (errstr != NULL || n == 0) { + error("moduli:%d: invalid primality trial count", linenum); goto fail; + } strsize = strsep(&cp, " "); /* size */ if (cp == NULL || *strsize == '\0' || (dhg->size = (int)strtonum(strsize, 0, 64*1024, &errstr)) == 0 || - errstr) + errstr) { + error("moduli:%d: invalid prime length", linenum); goto fail; + } /* The whole group is one bit larger */ dhg->size++; gen = strsep(&cp, " "); /* gen */ if (cp == NULL || *gen == '\0') - goto fail; + goto truncated; prime = strsep(&cp, " "); /* prime */ - if (cp != NULL || *prime == '\0') + if (cp != NULL || *prime == '\0') { + truncated: + error("moduli:%d: truncated", linenum); goto fail; + } - if ((dhg->g = BN_new()) == NULL) - fatal("parse_prime: BN_new failed"); - if ((dhg->p = BN_new()) == NULL) - fatal("parse_prime: BN_new failed"); - if (BN_hex2bn(&dhg->g, gen) == 0) - goto failclean; + if ((dhg->g = BN_new()) == NULL || + (dhg->p = BN_new()) == NULL) { + error("parse_prime: BN_new failed"); + goto fail; + } + if (BN_hex2bn(&dhg->g, gen) == 0) { + error("moduli:%d: could not parse generator value", linenum); + goto fail; + } + if (BN_hex2bn(&dhg->p, prime) == 0) { + error("moduli:%d: could not parse prime value", linenum); + goto fail; + } + if (BN_num_bits(dhg->p) != dhg->size) { + error("moduli:%d: prime has wrong size: actual %d listed %d", + linenum, BN_num_bits(dhg->p), dhg->size - 1); + goto fail; + } + if (BN_cmp(dhg->g, BN_value_one()) <= 0) { + error("moduli:%d: generator is invalid", linenum); + goto fail; + } + return 1; - if (BN_hex2bn(&dhg->p, prime) == 0) - goto failclean; - - if (BN_num_bits(dhg->p) != dhg->size) - goto failclean; - - if (BN_is_zero(dhg->g) || BN_is_one(dhg->g)) - goto failclean; - - return (1); - - failclean: - BN_clear_free(dhg->g); - BN_clear_free(dhg->p); fail: - error("Bad prime description in line %d", linenum); - return (0); + if (dhg->g != NULL) + BN_clear_free(dhg->g); + if (dhg->p != NULL) + BN_clear_free(dhg->p); + dhg->g = dhg->p = NULL; + return 0; } DH * @@ -134,7 +155,7 @@ choose_dh(int min, int wantbits, int max) (f = fopen(_PATH_DH_PRIMES, "r")) == NULL) { logit("WARNING: %s does not exist, using fixed modulus", _PATH_DH_MODULI); - return (dh_new_group14()); + return (dh_new_group_fallback(max)); } linenum = 0; @@ -162,7 +183,7 @@ choose_dh(int min, int wantbits, int max) if (bestcount == 0) { fclose(f); logit("WARNING: no suitable primes in %s", _PATH_DH_PRIMES); - return (dh_new_group14()); + return (dh_new_group_fallback(max)); } linenum = 0; @@ -180,9 +201,11 @@ choose_dh(int min, int wantbits, int max) break; } fclose(f); - if (linenum != which+1) - fatal("WARNING: line %d disappeared in %s, giving up", + if (linenum != which+1) { + logit("WARNING: line %d disappeared in %s, giving up", which, _PATH_DH_PRIMES); + return (dh_new_group_fallback(max)); + } return (dh_new_group(dhg.g, dhg.p)); } @@ -231,34 +254,22 @@ dh_pub_is_valid(DH *dh, BIGNUM *dh_pub) return 0; } -void +int dh_gen_key(DH *dh, int need) { - int i, bits_set, tries = 0; + int pbits; - if (dh->p == NULL) - fatal("dh_gen_key: dh->p == NULL"); - if (need > INT_MAX / 2 || 2 * need >= BN_num_bits(dh->p)) - fatal("dh_gen_key: group too small: %d (2*need %d)", - BN_num_bits(dh->p), 2*need); - do { - if (dh->priv_key != NULL) - BN_clear_free(dh->priv_key); - if ((dh->priv_key = BN_new()) == NULL) - fatal("dh_gen_key: BN_new failed"); - /* generate a 2*need bits random private exponent */ - if (!BN_rand(dh->priv_key, 2*need, 0, 0)) - fatal("dh_gen_key: BN_rand failed"); - if (DH_generate_key(dh) == 0) - fatal("DH_generate_key"); - for (i = 0, bits_set = 0; i <= BN_num_bits(dh->priv_key); i++) - if (BN_is_bit_set(dh->priv_key, i)) - bits_set++; - debug2("dh_gen_key: priv key bits set: %d/%d", - bits_set, BN_num_bits(dh->priv_key)); - if (tries++ > 10) - fatal("dh_gen_key: too many bad keys: giving up"); - } while (!dh_pub_is_valid(dh, dh->pub_key)); + if (need < 0 || dh->p == NULL || + (pbits = BN_num_bits(dh->p)) <= 0 || + need > INT_MAX / 2 || 2 * need > pbits) + return SSH_ERR_INVALID_ARGUMENT; + dh->length = MIN(need * 2, pbits - 1); + if (DH_generate_key(dh) == 0 || + !dh_pub_is_valid(dh, dh->pub_key)) { + BN_clear_free(dh->priv_key); + return SSH_ERR_LIBCRYPTO_ERROR; + } + return 0; } DH * @@ -267,13 +278,12 @@ dh_new_group_asc(const char *gen, const char *modulus) DH *dh; if ((dh = DH_new()) == NULL) - fatal("dh_new_group_asc: DH_new"); - - if (BN_hex2bn(&dh->p, modulus) == 0) - fatal("BN_hex2bn p"); - if (BN_hex2bn(&dh->g, gen) == 0) - fatal("BN_hex2bn g"); - + return NULL; + if (BN_hex2bn(&dh->p, modulus) == 0 || + BN_hex2bn(&dh->g, gen) == 0) { + DH_free(dh); + return NULL; + } return (dh); } @@ -288,7 +298,7 @@ dh_new_group(BIGNUM *gen, BIGNUM *modulus) DH *dh; if ((dh = DH_new()) == NULL) - fatal("dh_new_group: DH_new"); + return NULL; dh->p = modulus; dh->g = gen; @@ -328,19 +338,61 @@ dh_new_group14(void) return (dh_new_group_asc(gen, group14)); } +/* + * 4k bit fallback group used by DH-GEX if moduli file cannot be read. + * Source: MODP group 16 from RFC3526. + */ +DH * +dh_new_group_fallback(int max) +{ + static char *gen = "2", *group16 = + "FFFFFFFF" "FFFFFFFF" "C90FDAA2" "2168C234" "C4C6628B" "80DC1CD1" + "29024E08" "8A67CC74" "020BBEA6" "3B139B22" "514A0879" "8E3404DD" + "EF9519B3" "CD3A431B" "302B0A6D" "F25F1437" "4FE1356D" "6D51C245" + "E485B576" "625E7EC6" "F44C42E9" "A637ED6B" "0BFF5CB6" "F406B7ED" + "EE386BFB" "5A899FA5" "AE9F2411" "7C4B1FE6" "49286651" "ECE45B3D" + "C2007CB8" "A163BF05" "98DA4836" "1C55D39A" "69163FA8" "FD24CF5F" + "83655D23" "DCA3AD96" "1C62F356" "208552BB" "9ED52907" "7096966D" + "670C354E" "4ABC9804" "F1746C08" "CA18217C" "32905E46" "2E36CE3B" + "E39E772C" "180E8603" "9B2783A2" "EC07A28F" "B5C55DF0" "6F4C52C9" + "DE2BCBF6" "95581718" "3995497C" "EA956AE5" "15D22618" "98FA0510" + "15728E5A" "8AAAC42D" "AD33170D" "04507A33" "A85521AB" "DF1CBA64" + "ECFB8504" "58DBEF0A" "8AEA7157" "5D060C7D" "B3970F85" "A6E1E4C7" + "ABF5AE8C" "DB0933D7" "1E8C94E0" "4A25619D" "CEE3D226" "1AD2EE6B" + "F12FFA06" "D98A0864" "D8760273" "3EC86A64" "521F2B18" "177B200C" + "BBE11757" "7A615D6C" "770988C0" "BAD946E2" "08E24FA0" "74E5AB31" + "43DB5BFC" "E0FD108E" "4B82D120" "A9210801" "1A723C12" "A787E6D7" + "88719A10" "BDBA5B26" "99C32718" "6AF4E23C" "1A946834" "B6150BDA" + "2583E9CA" "2AD44CE8" "DBBBC2DB" "04DE8EF9" "2E8EFC14" "1FBECAA6" + "287C5947" "4E6BC05D" "99B2964F" "A090C3A2" "233BA186" "515BE7ED" + "1F612970" "CEE2D7AF" "B81BDD76" "2170481C" "D0069127" "D5B05AA9" + "93B4EA98" "8D8FDDC1" "86FFB7DC" "90A6C08F" "4DF435C9" "34063199" + "FFFFFFFF" "FFFFFFFF"; + + if (max < 4096) { + debug3("requested max size %d, using 2k bit group 14", max); + return dh_new_group14(); + } + debug3("using 4k bit group 16"); + return (dh_new_group_asc(gen, group16)); +} + /* * Estimates the group order for a Diffie-Hellman group that has an - * attack complexity approximately the same as O(2**bits). Estimate - * with: O(exp(1.9223 * (ln q)^(1/3) (ln ln q)^(2/3))) + * attack complexity approximately the same as O(2**bits). + * Values from NIST Special Publication 800-57: Recommendation for Key + * Management Part 1 (rev 3) limited by the recommended maximum value + * from RFC4419 section 3. */ -int +u_int dh_estimate(int bits) { - + if (bits <= 112) + return 2048; if (bits <= 128) - return (1024); /* O(2**86) */ + return 3072; if (bits <= 192) - return (2048); /* O(2**116) */ - return (4096); /* O(2**156) */ + return 7680; + return 8192; } diff --git a/dh.h b/dh.h index dfc1480..6546953 100644 --- a/dh.h +++ b/dh.h @@ -1,4 +1,4 @@ -/* $OpenBSD: dh.h,v 1.10 2008/06/26 09:19:40 djm Exp $ */ +/* $OpenBSD: dh.h,v 1.13 2015/05/27 23:39:18 dtucker Exp $ */ /* * Copyright (c) 2000 Niels Provos. All rights reserved. @@ -37,12 +37,14 @@ DH *dh_new_group_asc(const char *, const char *); DH *dh_new_group(BIGNUM *, BIGNUM *); DH *dh_new_group1(void); DH *dh_new_group14(void); +DH *dh_new_group_fallback(int); -void dh_gen_key(DH *, int); +int dh_gen_key(DH *, int); int dh_pub_is_valid(DH *, BIGNUM *); -int dh_estimate(int); +u_int dh_estimate(int); +/* Min and max values from RFC4419. */ #define DH_GRP_MIN 1024 #define DH_GRP_MAX 8192 diff --git a/digest-libc.c b/digest-libc.c new file mode 100644 index 0000000..40db002 --- /dev/null +++ b/digest-libc.c @@ -0,0 +1,264 @@ +/* $OpenBSD: digest-libc.c,v 1.5 2015/05/05 02:48:17 jsg Exp $ */ +/* + * Copyright (c) 2013 Damien Miller + * Copyright (c) 2014 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#ifndef WITH_OPENSSL + +#include +#include +#include +#include + +#if 0 +#include +#include +#include +#include +#endif + +#include "ssherr.h" +#include "sshbuf.h" +#include "digest.h" + +typedef void md_init_fn(void *mdctx); +typedef void md_update_fn(void *mdctx, const u_int8_t *m, size_t mlen); +typedef void md_final_fn(u_int8_t[], void *mdctx); + +struct ssh_digest_ctx { + int alg; + void *mdctx; +}; + +struct ssh_digest { + int id; + const char *name; + size_t block_len; + size_t digest_len; + size_t ctx_len; + md_init_fn *md_init; + md_update_fn *md_update; + md_final_fn *md_final; +}; + +/* NB. Indexed directly by algorithm number */ +const struct ssh_digest digests[SSH_DIGEST_MAX] = { + { + SSH_DIGEST_MD5, + "MD5", + MD5_BLOCK_LENGTH, + MD5_DIGEST_LENGTH, + sizeof(MD5_CTX), + (md_init_fn *) MD5Init, + (md_update_fn *) MD5Update, + (md_final_fn *) MD5Final + }, + { + SSH_DIGEST_RIPEMD160, + "RIPEMD160", + RMD160_BLOCK_LENGTH, + RMD160_DIGEST_LENGTH, + sizeof(RMD160_CTX), + (md_init_fn *) RMD160Init, + (md_update_fn *) RMD160Update, + (md_final_fn *) RMD160Final + }, + { + SSH_DIGEST_SHA1, + "SHA1", + SHA1_BLOCK_LENGTH, + SHA1_DIGEST_LENGTH, + sizeof(SHA1_CTX), + (md_init_fn *) SHA1Init, + (md_update_fn *) SHA1Update, + (md_final_fn *) SHA1Final + }, + { + SSH_DIGEST_SHA256, + "SHA256", + SHA256_BLOCK_LENGTH, + SHA256_DIGEST_LENGTH, + sizeof(SHA256_CTX), + (md_init_fn *) SHA256_Init, + (md_update_fn *) SHA256_Update, + (md_final_fn *) SHA256_Final + }, + { + SSH_DIGEST_SHA384, + "SHA384", + SHA384_BLOCK_LENGTH, + SHA384_DIGEST_LENGTH, + sizeof(SHA384_CTX), + (md_init_fn *) SHA384_Init, + (md_update_fn *) SHA384_Update, + (md_final_fn *) SHA384_Final + }, + { + SSH_DIGEST_SHA512, + "SHA512", + SHA512_BLOCK_LENGTH, + SHA512_DIGEST_LENGTH, + sizeof(SHA512_CTX), + (md_init_fn *) SHA512_Init, + (md_update_fn *) SHA512_Update, + (md_final_fn *) SHA512_Final + } +}; + +static const struct ssh_digest * +ssh_digest_by_alg(int alg) +{ + if (alg < 0 || alg >= SSH_DIGEST_MAX) + return NULL; + if (digests[alg].id != alg) /* sanity */ + return NULL; + return &(digests[alg]); +} + +int +ssh_digest_alg_by_name(const char *name) +{ + int alg; + + for (alg = 0; alg < SSH_DIGEST_MAX; alg++) { + if (strcasecmp(name, digests[alg].name) == 0) + return digests[alg].id; + } + return -1; +} + +const char * +ssh_digest_alg_name(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + + return digest == NULL ? NULL : digest->name; +} + +size_t +ssh_digest_bytes(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + + return digest == NULL ? 0 : digest->digest_len; +} + +size_t +ssh_digest_blocksize(struct ssh_digest_ctx *ctx) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg); + + return digest == NULL ? 0 : digest->block_len; +} + +struct ssh_digest_ctx * +ssh_digest_start(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + struct ssh_digest_ctx *ret; + + if (digest == NULL || (ret = calloc(1, sizeof(*ret))) == NULL) + return NULL; + if ((ret->mdctx = calloc(1, digest->ctx_len)) == NULL) { + free(ret); + return NULL; + } + ret->alg = alg; + digest->md_init(ret->mdctx); + return ret; +} + +int +ssh_digest_copy_state(struct ssh_digest_ctx *from, struct ssh_digest_ctx *to) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(from->alg); + + if (digest == NULL || from->alg != to->alg) + return SSH_ERR_INVALID_ARGUMENT; + memcpy(to->mdctx, from->mdctx, digest->ctx_len); + return 0; +} + +int +ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg); + + if (digest == NULL) + return SSH_ERR_INVALID_ARGUMENT; + digest->md_update(ctx->mdctx, m, mlen); + return 0; +} + +int +ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const struct sshbuf *b) +{ + return ssh_digest_update(ctx, sshbuf_ptr(b), sshbuf_len(b)); +} + +int +ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg); + + if (digest == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen > UINT_MAX) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen < digest->digest_len) /* No truncation allowed */ + return SSH_ERR_INVALID_ARGUMENT; + digest->md_final(d, ctx->mdctx); + return 0; +} + +void +ssh_digest_free(struct ssh_digest_ctx *ctx) +{ + const struct ssh_digest *digest; + + if (ctx != NULL) { + digest = ssh_digest_by_alg(ctx->alg); + if (digest) { + explicit_bzero(ctx->mdctx, digest->ctx_len); + free(ctx->mdctx); + explicit_bzero(ctx, sizeof(*ctx)); + free(ctx); + } + } +} + +int +ssh_digest_memory(int alg, const void *m, size_t mlen, u_char *d, size_t dlen) +{ + struct ssh_digest_ctx *ctx = ssh_digest_start(alg); + + if (ctx == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if (ssh_digest_update(ctx, m, mlen) != 0 || + ssh_digest_final(ctx, d, dlen) != 0) + return SSH_ERR_INVALID_ARGUMENT; + ssh_digest_free(ctx); + return 0; +} + +int +ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen) +{ + return ssh_digest_memory(alg, sshbuf_ptr(b), sshbuf_len(b), d, dlen); +} +#endif /* !WITH_OPENSSL */ diff --git a/digest-openssl.c b/digest-openssl.c new file mode 100644 index 0000000..13b63c2 --- /dev/null +++ b/digest-openssl.c @@ -0,0 +1,205 @@ +/* $OpenBSD: digest-openssl.c,v 1.5 2014/12/21 22:27:56 djm Exp $ */ +/* + * Copyright (c) 2013 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#ifdef WITH_OPENSSL + +#include +#include +#include +#include + +#include + +#include "openbsd-compat/openssl-compat.h" + +#include "sshbuf.h" +#include "digest.h" +#include "ssherr.h" + +#ifndef HAVE_EVP_RIPEMD160 +# define EVP_ripemd160 NULL +#endif /* HAVE_EVP_RIPEMD160 */ +#ifndef HAVE_EVP_SHA256 +# define EVP_sha256 NULL +# define EVP_sha384 NULL +# define EVP_sha512 NULL +#endif /* HAVE_EVP_SHA256 */ + +struct ssh_digest_ctx { + int alg; + EVP_MD_CTX mdctx; +}; + +struct ssh_digest { + int id; + const char *name; + size_t digest_len; + const EVP_MD *(*mdfunc)(void); +}; + +/* NB. Indexed directly by algorithm number */ +const struct ssh_digest digests[] = { + { SSH_DIGEST_MD5, "MD5", 16, EVP_md5 }, + { SSH_DIGEST_RIPEMD160, "RIPEMD160", 20, EVP_ripemd160 }, + { SSH_DIGEST_SHA1, "SHA1", 20, EVP_sha1 }, + { SSH_DIGEST_SHA256, "SHA256", 32, EVP_sha256 }, + { SSH_DIGEST_SHA384, "SHA384", 48, EVP_sha384 }, + { SSH_DIGEST_SHA512, "SHA512", 64, EVP_sha512 }, + { -1, NULL, 0, NULL }, +}; + +static const struct ssh_digest * +ssh_digest_by_alg(int alg) +{ + if (alg < 0 || alg >= SSH_DIGEST_MAX) + return NULL; + if (digests[alg].id != alg) /* sanity */ + return NULL; + if (digests[alg].mdfunc == NULL) + return NULL; + return &(digests[alg]); +} + +int +ssh_digest_alg_by_name(const char *name) +{ + int alg; + + for (alg = 0; digests[alg].id != -1; alg++) { + if (strcasecmp(name, digests[alg].name) == 0) + return digests[alg].id; + } + return -1; +} + +const char * +ssh_digest_alg_name(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + + return digest == NULL ? NULL : digest->name; +} + +size_t +ssh_digest_bytes(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + + return digest == NULL ? 0 : digest->digest_len; +} + +size_t +ssh_digest_blocksize(struct ssh_digest_ctx *ctx) +{ + return EVP_MD_CTX_block_size(&ctx->mdctx); +} + +struct ssh_digest_ctx * +ssh_digest_start(int alg) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + struct ssh_digest_ctx *ret; + + if (digest == NULL || ((ret = calloc(1, sizeof(*ret))) == NULL)) + return NULL; + ret->alg = alg; + EVP_MD_CTX_init(&ret->mdctx); + if (EVP_DigestInit_ex(&ret->mdctx, digest->mdfunc(), NULL) != 1) { + free(ret); + return NULL; + } + return ret; +} + +int +ssh_digest_copy_state(struct ssh_digest_ctx *from, struct ssh_digest_ctx *to) +{ + if (from->alg != to->alg) + return SSH_ERR_INVALID_ARGUMENT; + /* we have bcopy-style order while openssl has memcpy-style */ + if (!EVP_MD_CTX_copy_ex(&to->mdctx, &from->mdctx)) + return SSH_ERR_LIBCRYPTO_ERROR; + return 0; +} + +int +ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen) +{ + if (EVP_DigestUpdate(&ctx->mdctx, m, mlen) != 1) + return SSH_ERR_LIBCRYPTO_ERROR; + return 0; +} + +int +ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const struct sshbuf *b) +{ + return ssh_digest_update(ctx, sshbuf_ptr(b), sshbuf_len(b)); +} + +int +ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg); + u_int l = dlen; + + if (dlen > UINT_MAX) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen < digest->digest_len) /* No truncation allowed */ + return SSH_ERR_INVALID_ARGUMENT; + if (EVP_DigestFinal_ex(&ctx->mdctx, d, &l) != 1) + return SSH_ERR_LIBCRYPTO_ERROR; + if (l != digest->digest_len) /* sanity */ + return SSH_ERR_INTERNAL_ERROR; + return 0; +} + +void +ssh_digest_free(struct ssh_digest_ctx *ctx) +{ + if (ctx != NULL) { + EVP_MD_CTX_cleanup(&ctx->mdctx); + explicit_bzero(ctx, sizeof(*ctx)); + free(ctx); + } +} + +int +ssh_digest_memory(int alg, const void *m, size_t mlen, u_char *d, size_t dlen) +{ + const struct ssh_digest *digest = ssh_digest_by_alg(alg); + u_int mdlen; + + if (digest == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen > UINT_MAX) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen < digest->digest_len) + return SSH_ERR_INVALID_ARGUMENT; + mdlen = dlen; + if (!EVP_Digest(m, mlen, d, &mdlen, digest->mdfunc(), NULL)) + return SSH_ERR_LIBCRYPTO_ERROR; + return 0; +} + +int +ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen) +{ + return ssh_digest_memory(alg, sshbuf_ptr(b), sshbuf_len(b), d, dlen); +} +#endif /* WITH_OPENSSL */ diff --git a/digest.h b/digest.h new file mode 100644 index 0000000..3fe0734 --- /dev/null +++ b/digest.h @@ -0,0 +1,71 @@ +/* $OpenBSD: digest.h,v 1.7 2014/12/21 22:27:56 djm Exp $ */ +/* + * Copyright (c) 2013 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _DIGEST_H +#define _DIGEST_H + +/* Maximum digest output length */ +#define SSH_DIGEST_MAX_LENGTH 64 + +/* Digest algorithms */ +#define SSH_DIGEST_MD5 0 +#define SSH_DIGEST_RIPEMD160 1 +#define SSH_DIGEST_SHA1 2 +#define SSH_DIGEST_SHA256 3 +#define SSH_DIGEST_SHA384 4 +#define SSH_DIGEST_SHA512 5 +#define SSH_DIGEST_MAX 6 + +struct sshbuf; +struct ssh_digest_ctx; + +/* Looks up a digest algorithm by name */ +int ssh_digest_alg_by_name(const char *name); + +/* Returns the algorithm name for a digest identifier */ +const char *ssh_digest_alg_name(int alg); + +/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */ +size_t ssh_digest_bytes(int alg); + +/* Returns the block size of the digest, e.g. for implementing HMAC */ +size_t ssh_digest_blocksize(struct ssh_digest_ctx *ctx); + +/* Copies internal state of digest of 'from' to 'to' */ +int ssh_digest_copy_state(struct ssh_digest_ctx *from, + struct ssh_digest_ctx *to); + +/* One-shot API */ +int ssh_digest_memory(int alg, const void *m, size_t mlen, + u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 2, 3))) + __attribute__((__bounded__(__buffer__, 4, 5))); +int ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 3, 4))); + +/* Update API */ +struct ssh_digest_ctx *ssh_digest_start(int alg); +int ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +int ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, + const struct sshbuf *b); +int ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +void ssh_digest_free(struct ssh_digest_ctx *ctx); + +#endif /* _DIGEST_H */ + diff --git a/dispatch.c b/dispatch.c index 64bb809..aac933e 100644 --- a/dispatch.c +++ b/dispatch.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dispatch.c,v 1.22 2008/10/31 15:05:34 stevesk Exp $ */ +/* $OpenBSD: dispatch.c,v 1.27 2015/05/01 07:10:01 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -36,69 +36,107 @@ #include "dispatch.h" #include "packet.h" #include "compat.h" +#include "ssherr.h" -#define DISPATCH_MAX 255 - -dispatch_fn *dispatch[DISPATCH_MAX]; - -void -dispatch_protocol_error(int type, u_int32_t seq, void *ctxt) +int +dispatch_protocol_error(int type, u_int32_t seq, void *ctx) { + struct ssh *ssh = active_state; /* XXX */ + int r; + logit("dispatch_protocol_error: type %d seq %u", type, seq); if (!compat20) fatal("protocol error"); - packet_start(SSH2_MSG_UNIMPLEMENTED); - packet_put_int(seq); - packet_send(); - packet_write_wait(); + if ((r = sshpkt_start(ssh, SSH2_MSG_UNIMPLEMENTED)) != 0 || + (r = sshpkt_put_u32(ssh, seq)) != 0 || + (r = sshpkt_send(ssh)) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + sshpkt_fatal(ssh, __func__, r); + return 0; } -void -dispatch_protocol_ignore(int type, u_int32_t seq, void *ctxt) + +int +dispatch_protocol_ignore(int type, u_int32_t seq, void *ssh) { logit("dispatch_protocol_ignore: type %d seq %u", type, seq); + return 0; } + void -dispatch_init(dispatch_fn *dflt) +ssh_dispatch_init(struct ssh *ssh, dispatch_fn *dflt) { u_int i; for (i = 0; i < DISPATCH_MAX; i++) - dispatch[i] = dflt; + ssh->dispatch[i] = dflt; } + void -dispatch_range(u_int from, u_int to, dispatch_fn *fn) +ssh_dispatch_range(struct ssh *ssh, u_int from, u_int to, dispatch_fn *fn) { u_int i; for (i = from; i <= to; i++) { if (i >= DISPATCH_MAX) break; - dispatch[i] = fn; + ssh->dispatch[i] = fn; } } -void -dispatch_set(int type, dispatch_fn *fn) -{ - dispatch[type] = fn; -} -void -dispatch_run(int mode, volatile sig_atomic_t *done, void *ctxt) -{ - for (;;) { - int type; - u_int32_t seqnr; +void +ssh_dispatch_set(struct ssh *ssh, int type, dispatch_fn *fn) +{ + ssh->dispatch[type] = fn; +} + +int +ssh_dispatch_run(struct ssh *ssh, int mode, volatile sig_atomic_t *done, + void *ctxt) +{ + int r; + u_char type; + u_int32_t seqnr; + + for (;;) { if (mode == DISPATCH_BLOCK) { - type = packet_read_seqnr(&seqnr); + r = ssh_packet_read_seqnr(ssh, &type, &seqnr); + if (r != 0) + return r; } else { - type = packet_read_poll_seqnr(&seqnr); + r = ssh_packet_read_poll_seqnr(ssh, &type, &seqnr); + if (r != 0) + return r; if (type == SSH_MSG_NONE) - return; + return 0; + } + if (type > 0 && type < DISPATCH_MAX && + ssh->dispatch[type] != NULL) { + if (ssh->dispatch_skip_packets) { + debug2("skipped packet (type %u)", type); + ssh->dispatch_skip_packets--; + continue; + } + /* XXX 'ssh' will replace 'ctxt' later */ + r = (*ssh->dispatch[type])(type, seqnr, ctxt); + if (r != 0) + return r; + } else { + r = sshpkt_disconnect(ssh, + "protocol error: rcvd type %d", type); + if (r != 0) + return r; + return SSH_ERR_DISCONNECTED; } - if (type > 0 && type < DISPATCH_MAX && dispatch[type] != NULL) - (*dispatch[type])(type, seqnr, ctxt); - else - packet_disconnect("protocol error: rcvd type %d", type); if (done != NULL && *done) - return; + return 0; } } + +void +ssh_dispatch_run_fatal(struct ssh *ssh, int mode, volatile sig_atomic_t *done, + void *ctxt) +{ + int r; + + if ((r = ssh_dispatch_run(ssh, mode, done, ctxt)) != 0) + sshpkt_fatal(ssh, __func__, r); +} diff --git a/dispatch.h b/dispatch.h index 3e3d1a1..cd51dbc 100644 --- a/dispatch.h +++ b/dispatch.h @@ -1,4 +1,4 @@ -/* $OpenBSD: dispatch.h,v 1.11 2006/04/20 09:27:09 djm Exp $ */ +/* $OpenBSD: dispatch.h,v 1.12 2015/01/19 20:07:45 markus Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. @@ -24,18 +24,35 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#include +#ifndef DISPATCH_H +#define DISPATCH_H + +#define DISPATCH_MAX 255 enum { DISPATCH_BLOCK, DISPATCH_NONBLOCK }; -typedef void dispatch_fn(int, u_int32_t, void *); +struct ssh; -void dispatch_init(dispatch_fn *); -void dispatch_set(int, dispatch_fn *); -void dispatch_range(u_int, u_int, dispatch_fn *); -void dispatch_run(int, volatile sig_atomic_t *, void *); -void dispatch_protocol_error(int, u_int32_t, void *); -void dispatch_protocol_ignore(int, u_int32_t, void *); +typedef int dispatch_fn(int, u_int32_t, void *); + +int dispatch_protocol_error(int, u_int32_t, void *); +int dispatch_protocol_ignore(int, u_int32_t, void *); +void ssh_dispatch_init(struct ssh *, dispatch_fn *); +void ssh_dispatch_set(struct ssh *, int, dispatch_fn *); +void ssh_dispatch_range(struct ssh *, u_int, u_int, dispatch_fn *); +int ssh_dispatch_run(struct ssh *, int, volatile sig_atomic_t *, void *); +void ssh_dispatch_run_fatal(struct ssh *, int, volatile sig_atomic_t *, void *); + +#define dispatch_init(dflt) \ + ssh_dispatch_init(active_state, (dflt)) +#define dispatch_range(from, to, fn) \ + ssh_dispatch_range(active_state, (from), (to), (fn)) +#define dispatch_set(type, fn) \ + ssh_dispatch_set(active_state, (type), (fn)) +#define dispatch_run(mode, done, ctxt) \ + ssh_dispatch_run_fatal(active_state, (mode), (done), (ctxt)) + +#endif diff --git a/dns.c b/dns.c index 139083d..27475cf 100644 --- a/dns.c +++ b/dns.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dns.c,v 1.27 2010/08/31 11:54:45 djm Exp $ */ +/* $OpenBSD: dns.c,v 1.35 2015/08/20 22:32:42 deraadt Exp $ */ /* * Copyright (c) 2003 Wesley Griffin. All rights reserved. @@ -34,11 +34,15 @@ #include #include #include +#include +#include #include "xmalloc.h" -#include "key.h" +#include "sshkey.h" +#include "ssherr.h" #include "dns.h" #include "log.h" +#include "digest.h" static const char *errset_text[] = { "success", /* 0 ERRSET_SUCCESS */ @@ -75,30 +79,55 @@ dns_result_totext(unsigned int res) */ static int dns_read_key(u_int8_t *algorithm, u_int8_t *digest_type, - u_char **digest, u_int *digest_len, Key *key) + u_char **digest, size_t *digest_len, struct sshkey *key) { - int success = 0; + int r, success = 0; + int fp_alg = -1; switch (key->type) { case KEY_RSA: *algorithm = SSHFP_KEY_RSA; + if (!*digest_type) + *digest_type = SSHFP_HASH_SHA1; break; case KEY_DSA: *algorithm = SSHFP_KEY_DSA; + if (!*digest_type) + *digest_type = SSHFP_HASH_SHA1; + break; + case KEY_ECDSA: + *algorithm = SSHFP_KEY_ECDSA; + if (!*digest_type) + *digest_type = SSHFP_HASH_SHA256; + break; + case KEY_ED25519: + *algorithm = SSHFP_KEY_ED25519; + if (!*digest_type) + *digest_type = SSHFP_HASH_SHA256; break; - /* XXX KEY_ECDSA */ default: *algorithm = SSHFP_KEY_RESERVED; /* 0 */ + *digest_type = SSHFP_HASH_RESERVED; /* 0 */ } - if (*algorithm) { - *digest_type = SSHFP_HASH_SHA1; - *digest = key_fingerprint_raw(key, SSH_FP_SHA1, digest_len); - if (*digest == NULL) - fatal("dns_read_key: null from key_fingerprint_raw()"); + switch (*digest_type) { + case SSHFP_HASH_SHA1: + fp_alg = SSH_DIGEST_SHA1; + break; + case SSHFP_HASH_SHA256: + fp_alg = SSH_DIGEST_SHA256; + break; + default: + *digest_type = SSHFP_HASH_RESERVED; /* 0 */ + } + + if (*algorithm && *digest_type) { + if ((r = sshkey_fingerprint_raw(key, fp_alg, digest, + digest_len)) != 0) + fatal("%s: sshkey_fingerprint_raw: %s", __func__, + ssh_err(r)); success = 1; } else { - *digest_type = SSHFP_HASH_RESERVED; *digest = NULL; *digest_len = 0; success = 0; @@ -112,7 +141,7 @@ dns_read_key(u_int8_t *algorithm, u_int8_t *digest_type, */ static int dns_read_rdata(u_int8_t *algorithm, u_int8_t *digest_type, - u_char **digest, u_int *digest_len, u_char *rdata, int rdata_len) + u_char **digest, size_t *digest_len, u_char *rdata, int rdata_len) { int success = 0; @@ -125,7 +154,7 @@ dns_read_rdata(u_int8_t *algorithm, u_int8_t *digest_type, *digest_len = rdata_len - 2; if (*digest_len > 0) { - *digest = (u_char *) xmalloc(*digest_len); + *digest = xmalloc(*digest_len); memcpy(*digest, rdata + 2, *digest_len); } else { *digest = (u_char *)xstrdup(""); @@ -173,7 +202,7 @@ is_numeric_hostname(const char *hostname) */ int verify_host_key_dns(const char *hostname, struct sockaddr *address, - Key *hostkey, int *flags) + struct sshkey *hostkey, int *flags) { #ifndef WIN32_FIXME u_int counter; @@ -181,14 +210,14 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address, struct rrsetinfo *fingerprints = NULL; u_int8_t hostkey_algorithm; - u_int8_t hostkey_digest_type; + u_int8_t hostkey_digest_type = SSHFP_HASH_RESERVED; u_char *hostkey_digest; - u_int hostkey_digest_len; + size_t hostkey_digest_len; u_int8_t dnskey_algorithm; u_int8_t dnskey_digest_type; u_char *dnskey_digest; - u_int dnskey_digest_len; + size_t dnskey_digest_len; *flags = 0; @@ -217,7 +246,7 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address, fingerprints->rri_nrdatas); } - /* Initialize host key parameters */ + /* Initialize default host key parameters */ if (!dns_read_key(&hostkey_algorithm, &hostkey_digest_type, &hostkey_digest, &hostkey_digest_len, hostkey)) { error("Error calculating host key fingerprint."); @@ -241,21 +270,32 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address, continue; } + if (hostkey_digest_type != dnskey_digest_type) { + hostkey_digest_type = dnskey_digest_type; + free(hostkey_digest); + + /* Initialize host key parameters */ + if (!dns_read_key(&hostkey_algorithm, + &hostkey_digest_type, &hostkey_digest, + &hostkey_digest_len, hostkey)) { + error("Error calculating key fingerprint."); + freerrset(fingerprints); + return -1; + } + } + /* Check if the current key is the same as the given key */ if (hostkey_algorithm == dnskey_algorithm && hostkey_digest_type == dnskey_digest_type) { - if (hostkey_digest_len == dnskey_digest_len && - memcmp(hostkey_digest, dnskey_digest, - hostkey_digest_len) == 0) { - + timingsafe_bcmp(hostkey_digest, dnskey_digest, + hostkey_digest_len) == 0) *flags |= DNS_VERIFY_MATCH; - } } - xfree(dnskey_digest); + free(dnskey_digest); } - xfree(hostkey_digest); /* from key_fingerprint_raw() */ + free(hostkey_digest); /* from sshkey_fingerprint_raw() */ freerrset(fingerprints); if (*flags & DNS_VERIFY_FOUND) @@ -276,34 +316,39 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address, * Export the fingerprint of a key as a DNS resource record */ int -export_dns_rr(const char *hostname, Key *key, FILE *f, int generic) +export_dns_rr(const char *hostname, struct sshkey *key, FILE *f, int generic) { u_int8_t rdata_pubkey_algorithm = 0; - u_int8_t rdata_digest_type = SSHFP_HASH_SHA1; + u_int8_t rdata_digest_type = SSHFP_HASH_RESERVED; + u_int8_t dtype; u_char *rdata_digest; - u_int rdata_digest_len; - - u_int i; + size_t i, rdata_digest_len; int success = 0; - if (dns_read_key(&rdata_pubkey_algorithm, &rdata_digest_type, - &rdata_digest, &rdata_digest_len, key)) { + for (dtype = SSHFP_HASH_SHA1; dtype < SSHFP_HASH_MAX; dtype++) { + rdata_digest_type = dtype; + if (dns_read_key(&rdata_pubkey_algorithm, &rdata_digest_type, + &rdata_digest, &rdata_digest_len, key)) { + if (generic) { + fprintf(f, "%s IN TYPE%d \\# %zu %02x %02x ", + hostname, DNS_RDATATYPE_SSHFP, + 2 + rdata_digest_len, + rdata_pubkey_algorithm, rdata_digest_type); + } else { + fprintf(f, "%s IN SSHFP %d %d ", hostname, + rdata_pubkey_algorithm, rdata_digest_type); + } + for (i = 0; i < rdata_digest_len; i++) + fprintf(f, "%02x", rdata_digest[i]); + fprintf(f, "\n"); + free(rdata_digest); /* from sshkey_fingerprint_raw() */ + success = 1; + } + } - if (generic) - fprintf(f, "%s IN TYPE%d \\# %d %02x %02x ", hostname, - DNS_RDATATYPE_SSHFP, 2 + rdata_digest_len, - rdata_pubkey_algorithm, rdata_digest_type); - else - fprintf(f, "%s IN SSHFP %d %d ", hostname, - rdata_pubkey_algorithm, rdata_digest_type); - - for (i = 0; i < rdata_digest_len; i++) - fprintf(f, "%02x", rdata_digest[i]); - fprintf(f, "\n"); - xfree(rdata_digest); /* from key_fingerprint_raw() */ - success = 1; - } else { - error("export_dns_rr: unsupported algorithm"); + /* No SSHFP record was generated at all */ + if (success == 0) { + error("%s: unsupported algorithm and/or digest_type", __func__); } return success; diff --git a/dns.h b/dns.h index 90cfd7b..30e2b19 100644 --- a/dns.h +++ b/dns.h @@ -1,4 +1,4 @@ -/* $OpenBSD: dns.h,v 1.11 2010/02/26 20:29:54 djm Exp $ */ +/* $OpenBSD: dns.h,v 1.15 2015/05/08 06:45:13 djm Exp $ */ /* * Copyright (c) 2003 Wesley Griffin. All rights reserved. @@ -29,14 +29,18 @@ #define DNS_H enum sshfp_types { - SSHFP_KEY_RESERVED, - SSHFP_KEY_RSA, - SSHFP_KEY_DSA + SSHFP_KEY_RESERVED = 0, + SSHFP_KEY_RSA = 1, + SSHFP_KEY_DSA = 2, + SSHFP_KEY_ECDSA = 3, + SSHFP_KEY_ED25519 = 4 }; enum sshfp_hashes { - SSHFP_HASH_RESERVED, - SSHFP_HASH_SHA1 + SSHFP_HASH_RESERVED = 0, + SSHFP_HASH_SHA1 = 1, + SSHFP_HASH_SHA256 = 2, + SSHFP_HASH_MAX = 3 }; #define DNS_RDATACLASS_IN 1 @@ -46,7 +50,8 @@ enum sshfp_hashes { #define DNS_VERIFY_MATCH 0x00000002 #define DNS_VERIFY_SECURE 0x00000004 -int verify_host_key_dns(const char *, struct sockaddr *, Key *, int *); -int export_dns_rr(const char *, Key *, FILE *, int); +int verify_host_key_dns(const char *, struct sockaddr *, + struct sshkey *, int *); +int export_dns_rr(const char *, struct sshkey *, FILE *, int); #endif /* DNS_H */ diff --git a/ed25519.c b/ed25519.c new file mode 100644 index 0000000..767ec24 --- /dev/null +++ b/ed25519.c @@ -0,0 +1,144 @@ +/* $OpenBSD: ed25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/ed25519.c + */ + +#include "includes.h" +#include "crypto_api.h" + +#include "ge25519.h" + +static void get_hram(unsigned char *hram, const unsigned char *sm, const unsigned char *pk, unsigned char *playground, unsigned long long smlen) +{ + unsigned long long i; + + for (i = 0;i < 32;++i) playground[i] = sm[i]; + for (i = 32;i < 64;++i) playground[i] = pk[i-32]; + for (i = 64;i < smlen;++i) playground[i] = sm[i]; + + crypto_hash_sha512(hram,playground,smlen); +} + + +int crypto_sign_ed25519_keypair( + unsigned char *pk, + unsigned char *sk + ) +{ + sc25519 scsk; + ge25519 gepk; + unsigned char extsk[64]; + int i; + + randombytes(sk, 32); + crypto_hash_sha512(extsk, sk, 32); + extsk[0] &= 248; + extsk[31] &= 127; + extsk[31] |= 64; + + sc25519_from32bytes(&scsk,extsk); + + ge25519_scalarmult_base(&gepk, &scsk); + ge25519_pack(pk, &gepk); + for(i=0;i<32;i++) + sk[32 + i] = pk[i]; + return 0; +} + +int crypto_sign_ed25519( + unsigned char *sm,unsigned long long *smlen, + const unsigned char *m,unsigned long long mlen, + const unsigned char *sk + ) +{ + sc25519 sck, scs, scsk; + ge25519 ger; + unsigned char r[32]; + unsigned char s[32]; + unsigned char extsk[64]; + unsigned long long i; + unsigned char hmg[crypto_hash_sha512_BYTES]; + unsigned char hram[crypto_hash_sha512_BYTES]; + + crypto_hash_sha512(extsk, sk, 32); + extsk[0] &= 248; + extsk[31] &= 127; + extsk[31] |= 64; + + *smlen = mlen+64; + for(i=0;i #include #ifdef HAVE_SYS_UN_H @@ -43,6 +45,8 @@ #include #include +#include "openbsd-compat/openssl-compat.h" + #include "ssh.h" #include "misc.h" #include "xmalloc.h" @@ -209,11 +213,7 @@ seed_rng(void) #ifndef OPENSSL_PRNG_ONLY unsigned char buf[RANDOM_SEED_SIZE]; #endif - /* - * OpenSSL version numbers: MNNFFPPS: major minor fix patch status - * We match major, minor, fix and status (not patch) - */ - if ((SSLeay() ^ OPENSSL_VERSION_NUMBER) & ~0xff0L) + if (!ssh_compatible_openssl(OPENSSL_VERSION_NUMBER, SSLeay())) fatal("OpenSSL version mismatch. Built against %lx, you " "have %lx", (u_long)OPENSSL_VERSION_NUMBER, SSLeay()); @@ -232,3 +232,13 @@ seed_rng(void) if (RAND_status() != 1) fatal("PRNG is not seeded"); } + +#else /* WITH_OPENSSL */ + +/* Handled in arc4random() */ +void +seed_rng(void) +{ +} + +#endif /* WITH_OPENSSL */ diff --git a/entropy.h b/entropy.h index ec1ebcc..c3d78db 100644 --- a/entropy.h +++ b/entropy.h @@ -22,7 +22,7 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* $Id: entropy.h,v 1.5 2005/09/27 12:46:32 dtucker Exp $ */ +/* $Id: entropy.h,v 1.6 2011/09/09 01:29:41 dtucker Exp $ */ #ifndef _RANDOMS_H #define _RANDOMS_H @@ -30,7 +30,6 @@ #include "buffer.h" void seed_rng(void); -void init_rng(void); void rexec_send_rng_seed(Buffer *); void rexec_recv_rng_seed(Buffer *); diff --git a/fe25519.c b/fe25519.c new file mode 100644 index 0000000..e54fd15 --- /dev/null +++ b/fe25519.c @@ -0,0 +1,337 @@ +/* $OpenBSD: fe25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/fe25519.c + */ + +#include "includes.h" + +#define WINDOWSIZE 1 /* Should be 1,2, or 4 */ +#define WINDOWMASK ((1<>= 31; /* 1: yes; 0: no */ + return x; +} + +static crypto_uint32 ge(crypto_uint32 a,crypto_uint32 b) /* 16-bit inputs */ +{ + unsigned int x = a; + x -= (unsigned int) b; /* 0..65535: yes; 4294901761..4294967295: no */ + x >>= 31; /* 0: yes; 1: no */ + x ^= 1; /* 1: yes; 0: no */ + return x; +} + +static crypto_uint32 times19(crypto_uint32 a) +{ + return (a << 4) + (a << 1) + a; +} + +static crypto_uint32 times38(crypto_uint32 a) +{ + return (a << 5) + (a << 2) + (a << 1); +} + +static void reduce_add_sub(fe25519 *r) +{ + crypto_uint32 t; + int i,rep; + + for(rep=0;rep<4;rep++) + { + t = r->v[31] >> 7; + r->v[31] &= 127; + t = times19(t); + r->v[0] += t; + for(i=0;i<31;i++) + { + t = r->v[i] >> 8; + r->v[i+1] += t; + r->v[i] &= 255; + } + } +} + +static void reduce_mul(fe25519 *r) +{ + crypto_uint32 t; + int i,rep; + + for(rep=0;rep<2;rep++) + { + t = r->v[31] >> 7; + r->v[31] &= 127; + t = times19(t); + r->v[0] += t; + for(i=0;i<31;i++) + { + t = r->v[i] >> 8; + r->v[i+1] += t; + r->v[i] &= 255; + } + } +} + +/* reduction modulo 2^255-19 */ +void fe25519_freeze(fe25519 *r) +{ + int i; + crypto_uint32 m = equal(r->v[31],127); + for(i=30;i>0;i--) + m &= equal(r->v[i],255); + m &= ge(r->v[0],237); + + m = -m; + + r->v[31] -= m&127; + for(i=30;i>0;i--) + r->v[i] -= m&255; + r->v[0] -= m&237; +} + +void fe25519_unpack(fe25519 *r, const unsigned char x[32]) +{ + int i; + for(i=0;i<32;i++) r->v[i] = x[i]; + r->v[31] &= 127; +} + +/* Assumes input x being reduced below 2^255 */ +void fe25519_pack(unsigned char r[32], const fe25519 *x) +{ + int i; + fe25519 y = *x; + fe25519_freeze(&y); + for(i=0;i<32;i++) + r[i] = y.v[i]; +} + +int fe25519_iszero(const fe25519 *x) +{ + int i; + int r; + fe25519 t = *x; + fe25519_freeze(&t); + r = equal(t.v[0],0); + for(i=1;i<32;i++) + r &= equal(t.v[i],0); + return r; +} + +int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y) +{ + int i; + fe25519 t1 = *x; + fe25519 t2 = *y; + fe25519_freeze(&t1); + fe25519_freeze(&t2); + for(i=0;i<32;i++) + if(t1.v[i] != t2.v[i]) return 0; + return 1; +} + +void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b) +{ + int i; + crypto_uint32 mask = b; + mask = -mask; + for(i=0;i<32;i++) r->v[i] ^= mask & (x->v[i] ^ r->v[i]); +} + +unsigned char fe25519_getparity(const fe25519 *x) +{ + fe25519 t = *x; + fe25519_freeze(&t); + return t.v[0] & 1; +} + +void fe25519_setone(fe25519 *r) +{ + int i; + r->v[0] = 1; + for(i=1;i<32;i++) r->v[i]=0; +} + +void fe25519_setzero(fe25519 *r) +{ + int i; + for(i=0;i<32;i++) r->v[i]=0; +} + +void fe25519_neg(fe25519 *r, const fe25519 *x) +{ + fe25519 t; + int i; + for(i=0;i<32;i++) t.v[i]=x->v[i]; + fe25519_setzero(r); + fe25519_sub(r, r, &t); +} + +void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y) +{ + int i; + for(i=0;i<32;i++) r->v[i] = x->v[i] + y->v[i]; + reduce_add_sub(r); +} + +void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y) +{ + int i; + crypto_uint32 t[32]; + t[0] = x->v[0] + 0x1da; + t[31] = x->v[31] + 0xfe; + for(i=1;i<31;i++) t[i] = x->v[i] + 0x1fe; + for(i=0;i<32;i++) r->v[i] = t[i] - y->v[i]; + reduce_add_sub(r); +} + +void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y) +{ + int i,j; + crypto_uint32 t[63]; + for(i=0;i<63;i++)t[i] = 0; + + for(i=0;i<32;i++) + for(j=0;j<32;j++) + t[i+j] += x->v[i] * y->v[j]; + + for(i=32;i<63;i++) + r->v[i-32] = t[i-32] + times38(t[i]); + r->v[31] = t[31]; /* result now in r[0]...r[31] */ + + reduce_mul(r); +} + +void fe25519_square(fe25519 *r, const fe25519 *x) +{ + fe25519_mul(r, x, x); +} + +void fe25519_invert(fe25519 *r, const fe25519 *x) +{ + fe25519 z2; + fe25519 z9; + fe25519 z11; + fe25519 z2_5_0; + fe25519 z2_10_0; + fe25519 z2_20_0; + fe25519 z2_50_0; + fe25519 z2_100_0; + fe25519 t0; + fe25519 t1; + int i; + + /* 2 */ fe25519_square(&z2,x); + /* 4 */ fe25519_square(&t1,&z2); + /* 8 */ fe25519_square(&t0,&t1); + /* 9 */ fe25519_mul(&z9,&t0,x); + /* 11 */ fe25519_mul(&z11,&z9,&z2); + /* 22 */ fe25519_square(&t0,&z11); + /* 2^5 - 2^0 = 31 */ fe25519_mul(&z2_5_0,&t0,&z9); + + /* 2^6 - 2^1 */ fe25519_square(&t0,&z2_5_0); + /* 2^7 - 2^2 */ fe25519_square(&t1,&t0); + /* 2^8 - 2^3 */ fe25519_square(&t0,&t1); + /* 2^9 - 2^4 */ fe25519_square(&t1,&t0); + /* 2^10 - 2^5 */ fe25519_square(&t0,&t1); + /* 2^10 - 2^0 */ fe25519_mul(&z2_10_0,&t0,&z2_5_0); + + /* 2^11 - 2^1 */ fe25519_square(&t0,&z2_10_0); + /* 2^12 - 2^2 */ fe25519_square(&t1,&t0); + /* 2^20 - 2^10 */ for (i = 2;i < 10;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); } + /* 2^20 - 2^0 */ fe25519_mul(&z2_20_0,&t1,&z2_10_0); + + /* 2^21 - 2^1 */ fe25519_square(&t0,&z2_20_0); + /* 2^22 - 2^2 */ fe25519_square(&t1,&t0); + /* 2^40 - 2^20 */ for (i = 2;i < 20;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); } + /* 2^40 - 2^0 */ fe25519_mul(&t0,&t1,&z2_20_0); + + /* 2^41 - 2^1 */ fe25519_square(&t1,&t0); + /* 2^42 - 2^2 */ fe25519_square(&t0,&t1); + /* 2^50 - 2^10 */ for (i = 2;i < 10;i += 2) { fe25519_square(&t1,&t0); fe25519_square(&t0,&t1); } + /* 2^50 - 2^0 */ fe25519_mul(&z2_50_0,&t0,&z2_10_0); + + /* 2^51 - 2^1 */ fe25519_square(&t0,&z2_50_0); + /* 2^52 - 2^2 */ fe25519_square(&t1,&t0); + /* 2^100 - 2^50 */ for (i = 2;i < 50;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); } + /* 2^100 - 2^0 */ fe25519_mul(&z2_100_0,&t1,&z2_50_0); + + /* 2^101 - 2^1 */ fe25519_square(&t1,&z2_100_0); + /* 2^102 - 2^2 */ fe25519_square(&t0,&t1); + /* 2^200 - 2^100 */ for (i = 2;i < 100;i += 2) { fe25519_square(&t1,&t0); fe25519_square(&t0,&t1); } + /* 2^200 - 2^0 */ fe25519_mul(&t1,&t0,&z2_100_0); + + /* 2^201 - 2^1 */ fe25519_square(&t0,&t1); + /* 2^202 - 2^2 */ fe25519_square(&t1,&t0); + /* 2^250 - 2^50 */ for (i = 2;i < 50;i += 2) { fe25519_square(&t0,&t1); fe25519_square(&t1,&t0); } + /* 2^250 - 2^0 */ fe25519_mul(&t0,&t1,&z2_50_0); + + /* 2^251 - 2^1 */ fe25519_square(&t1,&t0); + /* 2^252 - 2^2 */ fe25519_square(&t0,&t1); + /* 2^253 - 2^3 */ fe25519_square(&t1,&t0); + /* 2^254 - 2^4 */ fe25519_square(&t0,&t1); + /* 2^255 - 2^5 */ fe25519_square(&t1,&t0); + /* 2^255 - 21 */ fe25519_mul(r,&t1,&z11); +} + +void fe25519_pow2523(fe25519 *r, const fe25519 *x) +{ + fe25519 z2; + fe25519 z9; + fe25519 z11; + fe25519 z2_5_0; + fe25519 z2_10_0; + fe25519 z2_20_0; + fe25519 z2_50_0; + fe25519 z2_100_0; + fe25519 t; + int i; + + /* 2 */ fe25519_square(&z2,x); + /* 4 */ fe25519_square(&t,&z2); + /* 8 */ fe25519_square(&t,&t); + /* 9 */ fe25519_mul(&z9,&t,x); + /* 11 */ fe25519_mul(&z11,&z9,&z2); + /* 22 */ fe25519_square(&t,&z11); + /* 2^5 - 2^0 = 31 */ fe25519_mul(&z2_5_0,&t,&z9); + + /* 2^6 - 2^1 */ fe25519_square(&t,&z2_5_0); + /* 2^10 - 2^5 */ for (i = 1;i < 5;i++) { fe25519_square(&t,&t); } + /* 2^10 - 2^0 */ fe25519_mul(&z2_10_0,&t,&z2_5_0); + + /* 2^11 - 2^1 */ fe25519_square(&t,&z2_10_0); + /* 2^20 - 2^10 */ for (i = 1;i < 10;i++) { fe25519_square(&t,&t); } + /* 2^20 - 2^0 */ fe25519_mul(&z2_20_0,&t,&z2_10_0); + + /* 2^21 - 2^1 */ fe25519_square(&t,&z2_20_0); + /* 2^40 - 2^20 */ for (i = 1;i < 20;i++) { fe25519_square(&t,&t); } + /* 2^40 - 2^0 */ fe25519_mul(&t,&t,&z2_20_0); + + /* 2^41 - 2^1 */ fe25519_square(&t,&t); + /* 2^50 - 2^10 */ for (i = 1;i < 10;i++) { fe25519_square(&t,&t); } + /* 2^50 - 2^0 */ fe25519_mul(&z2_50_0,&t,&z2_10_0); + + /* 2^51 - 2^1 */ fe25519_square(&t,&z2_50_0); + /* 2^100 - 2^50 */ for (i = 1;i < 50;i++) { fe25519_square(&t,&t); } + /* 2^100 - 2^0 */ fe25519_mul(&z2_100_0,&t,&z2_50_0); + + /* 2^101 - 2^1 */ fe25519_square(&t,&z2_100_0); + /* 2^200 - 2^100 */ for (i = 1;i < 100;i++) { fe25519_square(&t,&t); } + /* 2^200 - 2^0 */ fe25519_mul(&t,&t,&z2_100_0); + + /* 2^201 - 2^1 */ fe25519_square(&t,&t); + /* 2^250 - 2^50 */ for (i = 1;i < 50;i++) { fe25519_square(&t,&t); } + /* 2^250 - 2^0 */ fe25519_mul(&t,&t,&z2_50_0); + + /* 2^251 - 2^1 */ fe25519_square(&t,&t); + /* 2^252 - 2^2 */ fe25519_square(&t,&t); + /* 2^252 - 3 */ fe25519_mul(r,&t,x); +} diff --git a/fe25519.h b/fe25519.h new file mode 100644 index 0000000..41b3cbb --- /dev/null +++ b/fe25519.h @@ -0,0 +1,70 @@ +/* $OpenBSD: fe25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/fe25519.h + */ + +#ifndef FE25519_H +#define FE25519_H + +#include "crypto_api.h" + +#define fe25519 crypto_sign_ed25519_ref_fe25519 +#define fe25519_freeze crypto_sign_ed25519_ref_fe25519_freeze +#define fe25519_unpack crypto_sign_ed25519_ref_fe25519_unpack +#define fe25519_pack crypto_sign_ed25519_ref_fe25519_pack +#define fe25519_iszero crypto_sign_ed25519_ref_fe25519_iszero +#define fe25519_iseq_vartime crypto_sign_ed25519_ref_fe25519_iseq_vartime +#define fe25519_cmov crypto_sign_ed25519_ref_fe25519_cmov +#define fe25519_setone crypto_sign_ed25519_ref_fe25519_setone +#define fe25519_setzero crypto_sign_ed25519_ref_fe25519_setzero +#define fe25519_neg crypto_sign_ed25519_ref_fe25519_neg +#define fe25519_getparity crypto_sign_ed25519_ref_fe25519_getparity +#define fe25519_add crypto_sign_ed25519_ref_fe25519_add +#define fe25519_sub crypto_sign_ed25519_ref_fe25519_sub +#define fe25519_mul crypto_sign_ed25519_ref_fe25519_mul +#define fe25519_square crypto_sign_ed25519_ref_fe25519_square +#define fe25519_invert crypto_sign_ed25519_ref_fe25519_invert +#define fe25519_pow2523 crypto_sign_ed25519_ref_fe25519_pow2523 + +typedef struct +{ + crypto_uint32 v[32]; +} +fe25519; + +void fe25519_freeze(fe25519 *r); + +void fe25519_unpack(fe25519 *r, const unsigned char x[32]); + +void fe25519_pack(unsigned char r[32], const fe25519 *x); + +int fe25519_iszero(const fe25519 *x); + +int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y); + +void fe25519_cmov(fe25519 *r, const fe25519 *x, unsigned char b); + +void fe25519_setone(fe25519 *r); + +void fe25519_setzero(fe25519 *r); + +void fe25519_neg(fe25519 *r, const fe25519 *x); + +unsigned char fe25519_getparity(const fe25519 *x); + +void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y); + +void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y); + +void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y); + +void fe25519_square(fe25519 *r, const fe25519 *x); + +void fe25519_invert(fe25519 *r, const fe25519 *x); + +void fe25519_pow2523(fe25519 *r, const fe25519 *x); + +#endif diff --git a/ge25519.c b/ge25519.c new file mode 100644 index 0000000..dfe3849 --- /dev/null +++ b/ge25519.c @@ -0,0 +1,321 @@ +/* $OpenBSD: ge25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.c + */ + +#include "includes.h" + +#include "fe25519.h" +#include "sc25519.h" +#include "ge25519.h" + +/* + * Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2 + * with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555 + * Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960); + */ + +/* d */ +static const fe25519 ge25519_ecd = {{0xA3, 0x78, 0x59, 0x13, 0xCA, 0x4D, 0xEB, 0x75, 0xAB, 0xD8, 0x41, 0x41, 0x4D, 0x0A, 0x70, 0x00, + 0x98, 0xE8, 0x79, 0x77, 0x79, 0x40, 0xC7, 0x8C, 0x73, 0xFE, 0x6F, 0x2B, 0xEE, 0x6C, 0x03, 0x52}}; +/* 2*d */ +static const fe25519 ge25519_ec2d = {{0x59, 0xF1, 0xB2, 0x26, 0x94, 0x9B, 0xD6, 0xEB, 0x56, 0xB1, 0x83, 0x82, 0x9A, 0x14, 0xE0, 0x00, + 0x30, 0xD1, 0xF3, 0xEE, 0xF2, 0x80, 0x8E, 0x19, 0xE7, 0xFC, 0xDF, 0x56, 0xDC, 0xD9, 0x06, 0x24}}; +/* sqrt(-1) */ +static const fe25519 ge25519_sqrtm1 = {{0xB0, 0xA0, 0x0E, 0x4A, 0x27, 0x1B, 0xEE, 0xC4, 0x78, 0xE4, 0x2F, 0xAD, 0x06, 0x18, 0x43, 0x2F, + 0xA7, 0xD7, 0xFB, 0x3D, 0x99, 0x00, 0x4D, 0x2B, 0x0B, 0xDF, 0xC1, 0x4F, 0x80, 0x24, 0x83, 0x2B}}; + +#define ge25519_p3 ge25519 + +typedef struct +{ + fe25519 x; + fe25519 z; + fe25519 y; + fe25519 t; +} ge25519_p1p1; + +typedef struct +{ + fe25519 x; + fe25519 y; + fe25519 z; +} ge25519_p2; + +typedef struct +{ + fe25519 x; + fe25519 y; +} ge25519_aff; + + +/* Packed coordinates of the base point */ +const ge25519 ge25519_base = {{{0x1A, 0xD5, 0x25, 0x8F, 0x60, 0x2D, 0x56, 0xC9, 0xB2, 0xA7, 0x25, 0x95, 0x60, 0xC7, 0x2C, 0x69, + 0x5C, 0xDC, 0xD6, 0xFD, 0x31, 0xE2, 0xA4, 0xC0, 0xFE, 0x53, 0x6E, 0xCD, 0xD3, 0x36, 0x69, 0x21}}, + {{0x58, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, + 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66}}, + {{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}, + {{0xA3, 0xDD, 0xB7, 0xA5, 0xB3, 0x8A, 0xDE, 0x6D, 0xF5, 0x52, 0x51, 0x77, 0x80, 0x9F, 0xF0, 0x20, + 0x7D, 0xE3, 0xAB, 0x64, 0x8E, 0x4E, 0xEA, 0x66, 0x65, 0x76, 0x8B, 0xD7, 0x0F, 0x5F, 0x87, 0x67}}}; + +/* Multiples of the base point in affine representation */ +static const ge25519_aff ge25519_base_multiples_affine[425] = { +#include "ge25519_base.data" +}; + +static void p1p1_to_p2(ge25519_p2 *r, const ge25519_p1p1 *p) +{ + fe25519_mul(&r->x, &p->x, &p->t); + fe25519_mul(&r->y, &p->y, &p->z); + fe25519_mul(&r->z, &p->z, &p->t); +} + +static void p1p1_to_p3(ge25519_p3 *r, const ge25519_p1p1 *p) +{ + p1p1_to_p2((ge25519_p2 *)r, p); + fe25519_mul(&r->t, &p->x, &p->y); +} + +static void ge25519_mixadd2(ge25519_p3 *r, const ge25519_aff *q) +{ + fe25519 a,b,t1,t2,c,d,e,f,g,h,qt; + fe25519_mul(&qt, &q->x, &q->y); + fe25519_sub(&a, &r->y, &r->x); /* A = (Y1-X1)*(Y2-X2) */ + fe25519_add(&b, &r->y, &r->x); /* B = (Y1+X1)*(Y2+X2) */ + fe25519_sub(&t1, &q->y, &q->x); + fe25519_add(&t2, &q->y, &q->x); + fe25519_mul(&a, &a, &t1); + fe25519_mul(&b, &b, &t2); + fe25519_sub(&e, &b, &a); /* E = B-A */ + fe25519_add(&h, &b, &a); /* H = B+A */ + fe25519_mul(&c, &r->t, &qt); /* C = T1*k*T2 */ + fe25519_mul(&c, &c, &ge25519_ec2d); + fe25519_add(&d, &r->z, &r->z); /* D = Z1*2 */ + fe25519_sub(&f, &d, &c); /* F = D-C */ + fe25519_add(&g, &d, &c); /* G = D+C */ + fe25519_mul(&r->x, &e, &f); + fe25519_mul(&r->y, &h, &g); + fe25519_mul(&r->z, &g, &f); + fe25519_mul(&r->t, &e, &h); +} + +static void add_p1p1(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_p3 *q) +{ + fe25519 a, b, c, d, t; + + fe25519_sub(&a, &p->y, &p->x); /* A = (Y1-X1)*(Y2-X2) */ + fe25519_sub(&t, &q->y, &q->x); + fe25519_mul(&a, &a, &t); + fe25519_add(&b, &p->x, &p->y); /* B = (Y1+X1)*(Y2+X2) */ + fe25519_add(&t, &q->x, &q->y); + fe25519_mul(&b, &b, &t); + fe25519_mul(&c, &p->t, &q->t); /* C = T1*k*T2 */ + fe25519_mul(&c, &c, &ge25519_ec2d); + fe25519_mul(&d, &p->z, &q->z); /* D = Z1*2*Z2 */ + fe25519_add(&d, &d, &d); + fe25519_sub(&r->x, &b, &a); /* E = B-A */ + fe25519_sub(&r->t, &d, &c); /* F = D-C */ + fe25519_add(&r->z, &d, &c); /* G = D+C */ + fe25519_add(&r->y, &b, &a); /* H = B+A */ +} + +/* See http://www.hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html#doubling-dbl-2008-hwcd */ +static void dbl_p1p1(ge25519_p1p1 *r, const ge25519_p2 *p) +{ + fe25519 a,b,c,d; + fe25519_square(&a, &p->x); + fe25519_square(&b, &p->y); + fe25519_square(&c, &p->z); + fe25519_add(&c, &c, &c); + fe25519_neg(&d, &a); + + fe25519_add(&r->x, &p->x, &p->y); + fe25519_square(&r->x, &r->x); + fe25519_sub(&r->x, &r->x, &a); + fe25519_sub(&r->x, &r->x, &b); + fe25519_add(&r->z, &d, &b); + fe25519_sub(&r->t, &r->z, &c); + fe25519_sub(&r->y, &d, &b); +} + +/* Constant-time version of: if(b) r = p */ +static void cmov_aff(ge25519_aff *r, const ge25519_aff *p, unsigned char b) +{ + fe25519_cmov(&r->x, &p->x, b); + fe25519_cmov(&r->y, &p->y, b); +} + +static unsigned char equal(signed char b,signed char c) +{ + unsigned char ub = b; + unsigned char uc = c; + unsigned char x = ub ^ uc; /* 0: yes; 1..255: no */ + crypto_uint32 y = x; /* 0: yes; 1..255: no */ + y -= 1; /* 4294967295: yes; 0..254: no */ + y >>= 31; /* 1: yes; 0: no */ + return y; +} + +static unsigned char negative(signed char b) +{ + unsigned long long x = b; /* 18446744073709551361..18446744073709551615: yes; 0..255: no */ + x >>= 63; /* 1: yes; 0: no */ + return x; +} + +static void choose_t(ge25519_aff *t, unsigned long long pos, signed char b) +{ + /* constant time */ + fe25519 v; + *t = ge25519_base_multiples_affine[5*pos+0]; + cmov_aff(t, &ge25519_base_multiples_affine[5*pos+1],equal(b,1) | equal(b,-1)); + cmov_aff(t, &ge25519_base_multiples_affine[5*pos+2],equal(b,2) | equal(b,-2)); + cmov_aff(t, &ge25519_base_multiples_affine[5*pos+3],equal(b,3) | equal(b,-3)); + cmov_aff(t, &ge25519_base_multiples_affine[5*pos+4],equal(b,-4)); + fe25519_neg(&v, &t->x); + fe25519_cmov(&t->x, &v, negative(b)); +} + +static void setneutral(ge25519 *r) +{ + fe25519_setzero(&r->x); + fe25519_setone(&r->y); + fe25519_setone(&r->z); + fe25519_setzero(&r->t); +} + +/* ******************************************************************** + * EXPORTED FUNCTIONS + ******************************************************************** */ + +/* return 0 on success, -1 otherwise */ +int ge25519_unpackneg_vartime(ge25519_p3 *r, const unsigned char p[32]) +{ + unsigned char par; + fe25519 t, chk, num, den, den2, den4, den6; + fe25519_setone(&r->z); + par = p[31] >> 7; + fe25519_unpack(&r->y, p); + fe25519_square(&num, &r->y); /* x = y^2 */ + fe25519_mul(&den, &num, &ge25519_ecd); /* den = dy^2 */ + fe25519_sub(&num, &num, &r->z); /* x = y^2-1 */ + fe25519_add(&den, &r->z, &den); /* den = dy^2+1 */ + + /* Computation of sqrt(num/den) */ + /* 1.: computation of num^((p-5)/8)*den^((7p-35)/8) = (num*den^7)^((p-5)/8) */ + fe25519_square(&den2, &den); + fe25519_square(&den4, &den2); + fe25519_mul(&den6, &den4, &den2); + fe25519_mul(&t, &den6, &num); + fe25519_mul(&t, &t, &den); + + fe25519_pow2523(&t, &t); + /* 2. computation of r->x = t * num * den^3 */ + fe25519_mul(&t, &t, &num); + fe25519_mul(&t, &t, &den); + fe25519_mul(&t, &t, &den); + fe25519_mul(&r->x, &t, &den); + + /* 3. Check whether sqrt computation gave correct result, multiply by sqrt(-1) if not: */ + fe25519_square(&chk, &r->x); + fe25519_mul(&chk, &chk, &den); + if (!fe25519_iseq_vartime(&chk, &num)) + fe25519_mul(&r->x, &r->x, &ge25519_sqrtm1); + + /* 4. Now we have one of the two square roots, except if input was not a square */ + fe25519_square(&chk, &r->x); + fe25519_mul(&chk, &chk, &den); + if (!fe25519_iseq_vartime(&chk, &num)) + return -1; + + /* 5. Choose the desired square root according to parity: */ + if(fe25519_getparity(&r->x) != (1-par)) + fe25519_neg(&r->x, &r->x); + + fe25519_mul(&r->t, &r->x, &r->y); + return 0; +} + +void ge25519_pack(unsigned char r[32], const ge25519_p3 *p) +{ + fe25519 tx, ty, zi; + fe25519_invert(&zi, &p->z); + fe25519_mul(&tx, &p->x, &zi); + fe25519_mul(&ty, &p->y, &zi); + fe25519_pack(r, &ty); + r[31] ^= fe25519_getparity(&tx) << 7; +} + +int ge25519_isneutral_vartime(const ge25519_p3 *p) +{ + int ret = 1; + if(!fe25519_iszero(&p->x)) ret = 0; + if(!fe25519_iseq_vartime(&p->y, &p->z)) ret = 0; + return ret; +} + +/* computes [s1]p1 + [s2]p2 */ +void ge25519_double_scalarmult_vartime(ge25519_p3 *r, const ge25519_p3 *p1, const sc25519 *s1, const ge25519_p3 *p2, const sc25519 *s2) +{ + ge25519_p1p1 tp1p1; + ge25519_p3 pre[16]; + unsigned char b[127]; + int i; + + /* precomputation s2 s1 */ + setneutral(pre); /* 00 00 */ + pre[1] = *p1; /* 00 01 */ + dbl_p1p1(&tp1p1,(ge25519_p2 *)p1); p1p1_to_p3( &pre[2], &tp1p1); /* 00 10 */ + add_p1p1(&tp1p1,&pre[1], &pre[2]); p1p1_to_p3( &pre[3], &tp1p1); /* 00 11 */ + pre[4] = *p2; /* 01 00 */ + add_p1p1(&tp1p1,&pre[1], &pre[4]); p1p1_to_p3( &pre[5], &tp1p1); /* 01 01 */ + add_p1p1(&tp1p1,&pre[2], &pre[4]); p1p1_to_p3( &pre[6], &tp1p1); /* 01 10 */ + add_p1p1(&tp1p1,&pre[3], &pre[4]); p1p1_to_p3( &pre[7], &tp1p1); /* 01 11 */ + dbl_p1p1(&tp1p1,(ge25519_p2 *)p2); p1p1_to_p3( &pre[8], &tp1p1); /* 10 00 */ + add_p1p1(&tp1p1,&pre[1], &pre[8]); p1p1_to_p3( &pre[9], &tp1p1); /* 10 01 */ + dbl_p1p1(&tp1p1,(ge25519_p2 *)&pre[5]); p1p1_to_p3(&pre[10], &tp1p1); /* 10 10 */ + add_p1p1(&tp1p1,&pre[3], &pre[8]); p1p1_to_p3(&pre[11], &tp1p1); /* 10 11 */ + add_p1p1(&tp1p1,&pre[4], &pre[8]); p1p1_to_p3(&pre[12], &tp1p1); /* 11 00 */ + add_p1p1(&tp1p1,&pre[1],&pre[12]); p1p1_to_p3(&pre[13], &tp1p1); /* 11 01 */ + add_p1p1(&tp1p1,&pre[2],&pre[12]); p1p1_to_p3(&pre[14], &tp1p1); /* 11 10 */ + add_p1p1(&tp1p1,&pre[3],&pre[12]); p1p1_to_p3(&pre[15], &tp1p1); /* 11 11 */ + + sc25519_2interleave2(b,s1,s2); + + /* scalar multiplication */ + *r = pre[b[126]]; + for(i=125;i>=0;i--) + { + dbl_p1p1(&tp1p1, (ge25519_p2 *)r); + p1p1_to_p2((ge25519_p2 *) r, &tp1p1); + dbl_p1p1(&tp1p1, (ge25519_p2 *)r); + if(b[i]!=0) + { + p1p1_to_p3(r, &tp1p1); + add_p1p1(&tp1p1, r, &pre[b[i]]); + } + if(i != 0) p1p1_to_p2((ge25519_p2 *)r, &tp1p1); + else p1p1_to_p3(r, &tp1p1); + } +} + +void ge25519_scalarmult_base(ge25519_p3 *r, const sc25519 *s) +{ + signed char b[85]; + int i; + ge25519_aff t; + sc25519_window3(b,s); + + choose_t((ge25519_aff *)r, 0, b[0]); + fe25519_setone(&r->z); + fe25519_mul(&r->t, &r->x, &r->y); + for(i=1;i<85;i++) + { + choose_t(&t, (unsigned long long) i, b[i]); + ge25519_mixadd2(r, &t); + } +} diff --git a/ge25519.h b/ge25519.h new file mode 100644 index 0000000..a097637 --- /dev/null +++ b/ge25519.h @@ -0,0 +1,43 @@ +/* $OpenBSD: ge25519.h,v 1.4 2015/02/16 18:26:26 miod Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519.h + */ + +#ifndef GE25519_H +#define GE25519_H + +#include "fe25519.h" +#include "sc25519.h" + +#define ge25519 crypto_sign_ed25519_ref_ge25519 +#define ge25519_base crypto_sign_ed25519_ref_ge25519_base +#define ge25519_unpackneg_vartime crypto_sign_ed25519_ref_unpackneg_vartime +#define ge25519_pack crypto_sign_ed25519_ref_pack +#define ge25519_isneutral_vartime crypto_sign_ed25519_ref_isneutral_vartime +#define ge25519_double_scalarmult_vartime crypto_sign_ed25519_ref_double_scalarmult_vartime +#define ge25519_scalarmult_base crypto_sign_ed25519_ref_scalarmult_base + +typedef struct +{ + fe25519 x; + fe25519 y; + fe25519 z; + fe25519 t; +} ge25519; + +extern const ge25519 ge25519_base; + +int ge25519_unpackneg_vartime(ge25519 *r, const unsigned char p[32]); + +void ge25519_pack(unsigned char r[32], const ge25519 *p); + +int ge25519_isneutral_vartime(const ge25519 *p); + +void ge25519_double_scalarmult_vartime(ge25519 *r, const ge25519 *p1, const sc25519 *s1, const ge25519 *p2, const sc25519 *s2); + +void ge25519_scalarmult_base(ge25519 *r, const sc25519 *s); + +#endif diff --git a/ge25519_base.data b/ge25519_base.data new file mode 100644 index 0000000..66fb1b6 --- /dev/null +++ b/ge25519_base.data @@ -0,0 +1,858 @@ +/* $OpenBSD: ge25519_base.data,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/ge25519_base.data + */ + +{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}, + {{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}}, +{{{0x1a, 0xd5, 0x25, 0x8f, 0x60, 0x2d, 0x56, 0xc9, 0xb2, 0xa7, 0x25, 0x95, 0x60, 0xc7, 0x2c, 0x69, 0x5c, 0xdc, 0xd6, 0xfd, 0x31, 0xe2, 0xa4, 0xc0, 0xfe, 0x53, 0x6e, 0xcd, 0xd3, 0x36, 0x69, 0x21}} , + {{0x58, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, 0x66}}}, +{{{0x0e, 0xce, 0x43, 0x28, 0x4e, 0xa1, 0xc5, 0x83, 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{{0x35, 0xa3, 0x78, 0xd1, 0x11, 0x0f, 0x75, 0xd3, 0x70, 0x46, 0xdb, 0x20, 0x51, 0xcb, 0x92, 0x80, 0x54, 0x10, 0x74, 0x36, 0x86, 0xa9, 0xd7, 0xa3, 0x08, 0x78, 0xf1, 0x01, 0x29, 0xf8, 0x80, 0x3b}}}, +{{{0xdb, 0xa7, 0x9d, 0x9d, 0xbf, 0xa0, 0xcc, 0xed, 0x53, 0xa2, 0xa2, 0x19, 0x39, 0x48, 0x83, 0x19, 0x37, 0x58, 0xd1, 0x04, 0x28, 0x40, 0xf7, 0x8a, 0xc2, 0x08, 0xb7, 0xa5, 0x42, 0xcf, 0x53, 0x4c}} , + {{0xa7, 0xbb, 0xf6, 0x8e, 0xad, 0xdd, 0xf7, 0x90, 0xdd, 0x5f, 0x93, 0x89, 0xae, 0x04, 0x37, 0xe6, 0x9a, 0xb7, 0xe8, 0xc0, 0xdf, 0x16, 0x2a, 0xbf, 0xc4, 0x3a, 0x3c, 0x41, 0xd5, 0x89, 0x72, 0x5a}}}, +{{{0x1f, 0x96, 0xff, 0x34, 0x2c, 0x13, 0x21, 0xcb, 0x0a, 0x89, 0x85, 0xbe, 0xb3, 0x70, 0x9e, 0x1e, 0xde, 0x97, 0xaf, 0x96, 0x30, 0xf7, 0x48, 0x89, 0x40, 0x8d, 0x07, 0xf1, 0x25, 0xf0, 0x30, 0x58}} , + {{0x1e, 0xd4, 0x93, 0x57, 0xe2, 0x17, 0xe7, 0x9d, 0xab, 0x3c, 0x55, 0x03, 0x82, 0x2f, 0x2b, 0xdb, 0x56, 0x1e, 0x30, 0x2e, 0x24, 0x47, 0x6e, 0xe6, 0xff, 0x33, 0x24, 0x2c, 0x75, 0x51, 0xd4, 0x67}}}, +{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}, + {{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}}, +{{{0x2b, 0x06, 0xd9, 0xa1, 0x5d, 0xe1, 0xf4, 0xd1, 0x1e, 0x3c, 0x9a, 0xc6, 0x29, 0x2b, 0x13, 0x13, 0x78, 0xc0, 0xd8, 0x16, 0x17, 0x2d, 0x9e, 0xa9, 0xc9, 0x79, 0x57, 0xab, 0x24, 0x91, 0x92, 0x19}} , + {{0x69, 0xfb, 0xa1, 0x9c, 0xa6, 0x75, 0x49, 0x7d, 0x60, 0x73, 0x40, 0x42, 0xc4, 0x13, 0x0a, 0x95, 0x79, 0x1e, 0x04, 0x83, 0x94, 0x99, 0x9b, 0x1e, 0x0c, 0xe8, 0x1f, 0x54, 0xef, 0xcb, 0xc0, 0x52}}}, +{{{0x14, 0x89, 0x73, 0xa1, 0x37, 0x87, 0x6a, 0x7a, 0xcf, 0x1d, 0xd9, 0x2e, 0x1a, 0x67, 0xed, 0x74, 0xc0, 0xf0, 0x9c, 0x33, 0xdd, 0xdf, 0x08, 0xbf, 0x7b, 0xd1, 0x66, 0xda, 0xe6, 0xc9, 0x49, 0x08}} , + {{0xe9, 0xdd, 0x5e, 0x55, 0xb0, 0x0a, 0xde, 0x21, 0x4c, 0x5a, 0x2e, 0xd4, 0x80, 0x3a, 0x57, 0x92, 0x7a, 0xf1, 0xc4, 0x2c, 0x40, 0xaf, 0x2f, 0xc9, 0x92, 0x03, 0xe5, 0x5a, 0xbc, 0xdc, 0xf4, 0x09}}}, +{{{0xf3, 0xe1, 0x2b, 0x7c, 0x05, 0x86, 0x80, 0x93, 0x4a, 0xad, 0xb4, 0x8f, 0x7e, 0x99, 0x0c, 0xfd, 0xcd, 0xef, 0xd1, 0xff, 0x2c, 0x69, 0x34, 0x13, 0x41, 0x64, 0xcf, 0x3b, 0xd0, 0x90, 0x09, 0x1e}} , + {{0x9d, 0x45, 0xd6, 0x80, 0xe6, 0x45, 0xaa, 0xf4, 0x15, 0xaa, 0x5c, 0x34, 0x87, 0x99, 0xa2, 0x8c, 0x26, 0x84, 0x62, 0x7d, 0xb6, 0x29, 0xc0, 0x52, 0xea, 0xf5, 0x81, 0x18, 0x0f, 0x35, 0xa9, 0x0e}}}, +{{{0xe7, 0x20, 0x72, 0x7c, 0x6d, 0x94, 0x5f, 0x52, 0x44, 0x54, 0xe3, 0xf1, 0xb2, 0xb0, 0x36, 0x46, 0x0f, 0xae, 0x92, 0xe8, 0x70, 0x9d, 0x6e, 0x79, 0xb1, 0xad, 0x37, 0xa9, 0x5f, 0xc0, 0xde, 0x03}} , + {{0x15, 0x55, 0x37, 0xc6, 0x1c, 0x27, 0x1c, 0x6d, 0x14, 0x4f, 0xca, 0xa4, 0xc4, 0x88, 0x25, 0x46, 0x39, 0xfc, 0x5a, 0xe5, 0xfe, 0x29, 0x11, 0x69, 0xf5, 0x72, 0x84, 0x4d, 0x78, 0x9f, 0x94, 0x15}}}, +{{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}, + {{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}}, +{{{0xec, 0xd3, 0xff, 0x57, 0x0b, 0xb0, 0xb2, 0xdc, 0xf8, 0x4f, 0xe2, 0x12, 0xd5, 0x36, 0xbe, 0x6b, 0x09, 0x43, 0x6d, 0xa3, 0x4d, 0x90, 0x2d, 0xb8, 0x74, 0xe8, 0x71, 0x45, 0x19, 0x8b, 0x0c, 0x6a}} , + {{0xb8, 0x42, 0x1c, 0x03, 0xad, 0x2c, 0x03, 0x8e, 0xac, 0xd7, 0x98, 0x29, 0x13, 0xc6, 0x02, 0x29, 0xb5, 0xd4, 0xe7, 0xcf, 0xcc, 0x8b, 0x83, 0xec, 0x35, 0xc7, 0x9c, 0x74, 0xb7, 0xad, 0x85, 0x5f}}}, +{{{0x78, 0x84, 0xe1, 0x56, 0x45, 0x69, 0x68, 0x5a, 0x4f, 0xb8, 0xb1, 0x29, 0xff, 0x33, 0x03, 0x31, 0xb7, 0xcb, 0x96, 0x25, 0xe6, 0xe6, 0x41, 0x98, 0x1a, 0xbb, 0x03, 0x56, 0xf2, 0xb2, 0x91, 0x34}} , + {{0x2c, 0x6c, 0xf7, 0x66, 0xa4, 0x62, 0x6b, 0x39, 0xb3, 0xba, 0x65, 0xd3, 0x1c, 0xf8, 0x11, 0xaa, 0xbe, 0xdc, 0x80, 0x59, 0x87, 0xf5, 0x7b, 0xe5, 0xe3, 0xb3, 0x3e, 0x39, 0xda, 0xbe, 0x88, 0x09}}}, +{{{0x8b, 0xf1, 0xa0, 0xf5, 0xdc, 0x29, 0xb4, 0xe2, 0x07, 0xc6, 0x7a, 0x00, 0xd0, 0x89, 0x17, 0x51, 0xd4, 0xbb, 0xd4, 0x22, 0xea, 0x7e, 0x7d, 0x7c, 0x24, 0xea, 0xf2, 0xe8, 0x22, 0x12, 0x95, 0x06}} , + {{0xda, 0x7c, 0xa4, 0x0c, 0xf4, 0xba, 0x6e, 0xe1, 0x89, 0xb5, 0x59, 0xca, 0xf1, 0xc0, 0x29, 0x36, 0x09, 0x44, 0xe2, 0x7f, 0xd1, 0x63, 0x15, 0x99, 0xea, 0x25, 0xcf, 0x0c, 0x9d, 0xc0, 0x44, 0x6f}}}, +{{{0x1d, 0x86, 0x4e, 0xcf, 0xf7, 0x37, 0x10, 0x25, 0x8f, 0x12, 0xfb, 0x19, 0xfb, 0xe0, 0xed, 0x10, 0xc8, 0xe2, 0xf5, 0x75, 0xb1, 0x33, 0xc0, 0x96, 0x0d, 0xfb, 0x15, 0x6c, 0x0d, 0x07, 0x5f, 0x05}} , + {{0x69, 0x3e, 0x47, 0x97, 0x2c, 0xaf, 0x52, 0x7c, 0x78, 0x83, 0xad, 0x1b, 0x39, 0x82, 0x2f, 0x02, 0x6f, 0x47, 0xdb, 0x2a, 0xb0, 0xe1, 0x91, 0x99, 0x55, 0xb8, 0x99, 0x3a, 0xa0, 0x44, 0x11, 0x51}}} diff --git a/groupaccess.c b/groupaccess.c index 5a0ef4d..80a0533 100644 --- a/groupaccess.c +++ b/groupaccess.c @@ -1,4 +1,4 @@ -/* $OpenBSD: groupaccess.c,v 1.13 2008/07/04 03:44:59 djm Exp $ */ +/* $OpenBSD: groupaccess.c,v 1.16 2015/05/04 06:10:48 djm Exp $ */ /* * Copyright (c) 2001 Kevin Steves. All rights reserved. * @@ -35,12 +35,13 @@ #endif #include -#include #include #include #include +#include #include +#include #include "xmalloc.h" #include "groupaccess.h" @@ -78,7 +79,7 @@ ga_init(const char *user, gid_t base) for (i = 0, j = 0; i < ngroups; i++) if ((gr = getgrgid(groups_bygid[i])) != NULL) groups_byname[j++] = xstrdup(gr->gr_name); - xfree(groups_bygid); + free(groups_bygid); return (ngroups = j); #else return -1; @@ -109,11 +110,9 @@ int ga_match_pattern_list(const char *group_pattern) { int i, found = 0; - size_t len = strlen(group_pattern); for (i = 0; i < ngroups; i++) { - switch (match_pattern_list(groups_byname[i], - group_pattern, len, 0)) { + switch (match_pattern_list(groups_byname[i], group_pattern, 0)) { case -1: return 0; /* Negated match wins */ case 0: @@ -135,8 +134,8 @@ ga_free(void) if (ngroups > 0) { for (i = 0; i < ngroups; i++) - xfree(groups_byname[i]); + free(groups_byname[i]); ngroups = 0; - xfree(groups_byname); + free(groups_byname); } } diff --git a/gss-genr.c b/gss-genr.c index 842f385..d617d60 100644 --- a/gss-genr.c +++ b/gss-genr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: gss-genr.c,v 1.20 2009/06/22 05:39:28 dtucker Exp $ */ +/* $OpenBSD: gss-genr.c,v 1.23 2015/01/20 23:14:00 deraadt Exp $ */ /* * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved. @@ -31,8 +31,10 @@ #include #include +#include #include #include +#include #include #include "xmalloc.h" @@ -59,10 +61,10 @@ void ssh_gssapi_set_oid_data(Gssctxt *ctx, void *data, size_t len) { if (ctx->oid != GSS_C_NO_OID) { - xfree(ctx->oid->elements); - xfree(ctx->oid); + free(ctx->oid->elements); + free(ctx->oid); } - ctx->oid = xmalloc(sizeof(gss_OID_desc)); + ctx->oid = xcalloc(1, sizeof(gss_OID_desc)); ctx->oid->length = len; ctx->oid->elements = xmalloc(len); memcpy(ctx->oid->elements, data, len); @@ -83,7 +85,7 @@ ssh_gssapi_error(Gssctxt *ctxt) s = ssh_gssapi_last_error(ctxt, NULL, NULL); debug("%s", s); - xfree(s); + free(s); } char * @@ -164,8 +166,8 @@ ssh_gssapi_delete_ctx(Gssctxt **ctx) if ((*ctx)->name != GSS_C_NO_NAME) gss_release_name(&ms, &(*ctx)->name); if ((*ctx)->oid != GSS_C_NO_OID) { - xfree((*ctx)->oid->elements); - xfree((*ctx)->oid); + free((*ctx)->oid->elements); + free((*ctx)->oid); (*ctx)->oid = GSS_C_NO_OID; } if ((*ctx)->creds != GSS_C_NO_CREDENTIAL) @@ -175,7 +177,7 @@ ssh_gssapi_delete_ctx(Gssctxt **ctx) if ((*ctx)->client_creds != GSS_C_NO_CREDENTIAL) gss_release_cred(&ms, &(*ctx)->client_creds); - xfree(*ctx); + free(*ctx); *ctx = NULL; } @@ -222,7 +224,7 @@ ssh_gssapi_import_name(Gssctxt *ctx, const char *host) &gssbuf, GSS_C_NT_HOSTBASED_SERVICE, &ctx->name))) ssh_gssapi_error(ctx); - xfree(gssbuf.value); + free(gssbuf.value); return (ctx->major); } diff --git a/gss-serv-krb5.c b/gss-serv-krb5.c index 453c482..81de5ec 100644 --- a/gss-serv-krb5.c +++ b/gss-serv-krb5.c @@ -1,4 +1,4 @@ -/* $OpenBSD: gss-serv-krb5.c,v 1.7 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: gss-serv-krb5.c,v 1.8 2013/07/20 01:55:13 djm Exp $ */ /* * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. @@ -48,6 +48,7 @@ #include "hostfile.h" #include "auth.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "buffer.h" @@ -57,12 +58,11 @@ extern ServerOptions options; #ifdef HEIMDAL # include -#else -# ifdef HAVE_GSSAPI_KRB5_H -# include -# elif HAVE_GSSAPI_GSSAPI_KRB5_H -# include -# endif +#endif +#ifdef HAVE_GSSAPI_KRB5_H +# include +#elif HAVE_GSSAPI_GSSAPI_KRB5_H +# include #endif static krb5_context krb_context = NULL; @@ -96,14 +96,16 @@ ssh_gssapi_krb5_userok(ssh_gssapi_client *client, char *name) { krb5_principal princ; int retval; + const char *errmsg; if (ssh_gssapi_krb5_init() == 0) return 0; if ((retval = krb5_parse_name(krb_context, client->exportedname.value, &princ))) { - logit("krb5_parse_name(): %.100s", - krb5_get_err_text(krb_context, retval)); + errmsg = krb5_get_error_message(krb_context, retval); + logit("krb5_parse_name(): %.100s", errmsg); + krb5_free_error_message(krb_context, errmsg); return 0; } if (krb5_kuserok(krb_context, princ, name)) { @@ -129,6 +131,7 @@ ssh_gssapi_krb5_storecreds(ssh_gssapi_client *client) krb5_principal princ; OM_uint32 maj_status, min_status; int len; + const char *errmsg; if (client->creds == NULL) { debug("No credentials stored"); @@ -139,30 +142,40 @@ ssh_gssapi_krb5_storecreds(ssh_gssapi_client *client) return; #ifdef HEIMDAL +# ifdef HAVE_KRB5_CC_NEW_UNIQUE + if ((problem = krb5_cc_new_unique(krb_context, krb5_fcc_ops.prefix, + NULL, &ccache)) != 0) { + errmsg = krb5_get_error_message(krb_context, problem); + logit("krb5_cc_new_unique(): %.100s", errmsg); +# else if ((problem = krb5_cc_gen_new(krb_context, &krb5_fcc_ops, &ccache))) { - logit("krb5_cc_gen_new(): %.100s", - krb5_get_err_text(krb_context, problem)); + logit("krb5_cc_gen_new(): %.100s", + krb5_get_err_text(krb_context, problem)); +# endif + krb5_free_error_message(krb_context, errmsg); return; } #else if ((problem = ssh_krb5_cc_gen(krb_context, &ccache))) { - logit("ssh_krb5_cc_gen(): %.100s", - krb5_get_err_text(krb_context, problem)); + errmsg = krb5_get_error_message(krb_context, problem); + logit("ssh_krb5_cc_gen(): %.100s", errmsg); + krb5_free_error_message(krb_context, errmsg); return; } #endif /* #ifdef HEIMDAL */ if ((problem = krb5_parse_name(krb_context, client->exportedname.value, &princ))) { - logit("krb5_parse_name(): %.100s", - krb5_get_err_text(krb_context, problem)); - krb5_cc_destroy(krb_context, ccache); + errmsg = krb5_get_error_message(krb_context, problem); + logit("krb5_parse_name(): %.100s", errmsg); + krb5_free_error_message(krb_context, errmsg); return; } if ((problem = krb5_cc_initialize(krb_context, ccache, princ))) { - logit("krb5_cc_initialize(): %.100s", - krb5_get_err_text(krb_context, problem)); + errmsg = krb5_get_error_message(krb_context, problem); + logit("krb5_cc_initialize(): %.100s", errmsg); + krb5_free_error_message(krb_context, errmsg); krb5_free_principal(krb_context, princ); krb5_cc_destroy(krb_context, ccache); return; diff --git a/gss-serv.c b/gss-serv.c index a1b3992..8a832de 100644 --- a/gss-serv.c +++ b/gss-serv.c @@ -1,4 +1,4 @@ -/* $OpenBSD: gss-serv.c,v 1.23 2011/08/01 19:18:15 markus Exp $ */ +/* $OpenBSD: gss-serv.c,v 1.29 2015/05/22 03:50:02 djm Exp $ */ /* * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. @@ -38,7 +38,6 @@ #ifdef GSSAPI #include -#include #include #include @@ -54,12 +53,15 @@ #include "channels.h" #include "session.h" #include "misc.h" +#include "servconf.h" #include "ssh-gss.h" +extern ServerOptions options; + static ssh_gssapi_client gssapi_client = { GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER, - GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL}}; + GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL, NULL}}; ssh_gssapi_mech gssapi_null_mech = { NULL, NULL, {0, NULL}, NULL, NULL, NULL, NULL}; @@ -75,6 +77,25 @@ ssh_gssapi_mech* supported_mechs[]= { &gssapi_null_mech, }; +/* + * ssh_gssapi_supported_oids() can cause sandbox violations, so prepare the + * list of supported mechanisms before privsep is set up. + */ +static gss_OID_set supported_oids; + +void +ssh_gssapi_prepare_supported_oids(void) +{ + ssh_gssapi_supported_oids(&supported_oids); +} + +OM_uint32 +ssh_gssapi_test_oid_supported(OM_uint32 *ms, gss_OID member, int *present) +{ + if (supported_oids == NULL) + ssh_gssapi_prepare_supported_oids(); + return gss_test_oid_set_member(ms, member, supported_oids, present); +} /* * Acquire credentials for a server running on the current host. @@ -87,28 +108,35 @@ static OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *ctx) { OM_uint32 status; - char lname[MAXHOSTNAMELEN]; + char lname[NI_MAXHOST]; gss_OID_set oidset; - gss_create_empty_oid_set(&status, &oidset); - gss_add_oid_set_member(&status, ctx->oid, &oidset); + if (options.gss_strict_acceptor) { + gss_create_empty_oid_set(&status, &oidset); + gss_add_oid_set_member(&status, ctx->oid, &oidset); - if (gethostname(lname, MAXHOSTNAMELEN)) { - gss_release_oid_set(&status, &oidset); - return (-1); - } + if (gethostname(lname, MAXHOSTNAMELEN)) { + gss_release_oid_set(&status, &oidset); + return (-1); + } + + if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) { + gss_release_oid_set(&status, &oidset); + return (ctx->major); + } + + if ((ctx->major = gss_acquire_cred(&ctx->minor, + ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, + NULL, NULL))) + ssh_gssapi_error(ctx); - if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) { gss_release_oid_set(&status, &oidset); return (ctx->major); + } else { + ctx->name = GSS_C_NO_NAME; + ctx->creds = GSS_C_NO_CREDENTIAL; } - - if ((ctx->major = gss_acquire_cred(&ctx->minor, - ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, NULL, NULL))) - ssh_gssapi_error(ctx); - - gss_release_oid_set(&status, &oidset); - return (ctx->major); + return GSS_S_COMPLETE; } /* Privileged */ @@ -355,7 +383,8 @@ ssh_gssapi_userok(char *user) gss_release_buffer(&lmin, &gssapi_client.displayname); gss_release_buffer(&lmin, &gssapi_client.exportedname); gss_release_cred(&lmin, &gssapi_client.creds); - memset(&gssapi_client, 0, sizeof(ssh_gssapi_client)); + explicit_bzero(&gssapi_client, + sizeof(ssh_gssapi_client)); return 0; } else diff --git a/hash.c b/hash.c new file mode 100644 index 0000000..734c6be --- /dev/null +++ b/hash.c @@ -0,0 +1,76 @@ +/* $OpenBSD: hash.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* Copied from nacl-20110221/crypto_hash/sha512/ref/hash.c */ + +/* +20080913 +D. J. Bernstein +Public domain. +*/ + +#include "includes.h" + +#include "crypto_api.h" + +#define blocks crypto_hashblocks_sha512 + +static const unsigned char iv[64] = { + 0x6a,0x09,0xe6,0x67,0xf3,0xbc,0xc9,0x08, + 0xbb,0x67,0xae,0x85,0x84,0xca,0xa7,0x3b, + 0x3c,0x6e,0xf3,0x72,0xfe,0x94,0xf8,0x2b, + 0xa5,0x4f,0xf5,0x3a,0x5f,0x1d,0x36,0xf1, + 0x51,0x0e,0x52,0x7f,0xad,0xe6,0x82,0xd1, + 0x9b,0x05,0x68,0x8c,0x2b,0x3e,0x6c,0x1f, + 0x1f,0x83,0xd9,0xab,0xfb,0x41,0xbd,0x6b, + 0x5b,0xe0,0xcd,0x19,0x13,0x7e,0x21,0x79 +} ; + +typedef unsigned long long uint64; + +int crypto_hash_sha512(unsigned char *out,const unsigned char *in,unsigned long long inlen) +{ + unsigned char h[64]; + unsigned char padded[256]; + unsigned int i; + unsigned long long bytes = inlen; + + for (i = 0;i < 64;++i) h[i] = iv[i]; + + blocks(h,in,inlen); + in += inlen; + inlen &= 127; + in -= inlen; + + for (i = 0;i < inlen;++i) padded[i] = in[i]; + padded[inlen] = 0x80; + + if (inlen < 112) { + for (i = inlen + 1;i < 119;++i) padded[i] = 0; + padded[119] = bytes >> 61; + padded[120] = bytes >> 53; + padded[121] = bytes >> 45; + padded[122] = bytes >> 37; + padded[123] = bytes >> 29; + padded[124] = bytes >> 21; + padded[125] = bytes >> 13; + padded[126] = bytes >> 5; + padded[127] = bytes << 3; + blocks(h,padded,128); + } else { + for (i = inlen + 1;i < 247;++i) padded[i] = 0; + padded[247] = bytes >> 61; + padded[248] = bytes >> 53; + padded[249] = bytes >> 45; + padded[250] = bytes >> 37; + padded[251] = bytes >> 29; + padded[252] = bytes >> 21; + padded[253] = bytes >> 13; + padded[254] = bytes >> 5; + padded[255] = bytes << 3; + blocks(h,padded,256); + } + + for (i = 0;i < 64;++i) out[i] = h[i]; + + return 0; +} diff --git a/hmac.c b/hmac.c new file mode 100644 index 0000000..1c87964 --- /dev/null +++ b/hmac.c @@ -0,0 +1,197 @@ +/* $OpenBSD: hmac.c,v 1.12 2015/03/24 20:03:44 markus Exp $ */ +/* + * Copyright (c) 2014 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include + +#include "sshbuf.h" +#include "digest.h" +#include "hmac.h" + +struct ssh_hmac_ctx { + int alg; + struct ssh_digest_ctx *ictx; + struct ssh_digest_ctx *octx; + struct ssh_digest_ctx *digest; + u_char *buf; + size_t buf_len; +}; + +size_t +ssh_hmac_bytes(int alg) +{ + return ssh_digest_bytes(alg); +} + +struct ssh_hmac_ctx * +ssh_hmac_start(int alg) +{ + struct ssh_hmac_ctx *ret; + + if ((ret = calloc(1, sizeof(*ret))) == NULL) + return NULL; + ret->alg = alg; + if ((ret->ictx = ssh_digest_start(alg)) == NULL || + (ret->octx = ssh_digest_start(alg)) == NULL || + (ret->digest = ssh_digest_start(alg)) == NULL) + goto fail; + ret->buf_len = ssh_digest_blocksize(ret->ictx); + if ((ret->buf = calloc(1, ret->buf_len)) == NULL) + goto fail; + return ret; +fail: + ssh_hmac_free(ret); + return NULL; +} + +int +ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen) +{ + size_t i; + + /* reset ictx and octx if no is key given */ + if (key != NULL) { + /* truncate long keys */ + if (klen <= ctx->buf_len) + memcpy(ctx->buf, key, klen); + else if (ssh_digest_memory(ctx->alg, key, klen, ctx->buf, + ctx->buf_len) < 0) + return -1; + for (i = 0; i < ctx->buf_len; i++) + ctx->buf[i] ^= 0x36; + if (ssh_digest_update(ctx->ictx, ctx->buf, ctx->buf_len) < 0) + return -1; + for (i = 0; i < ctx->buf_len; i++) + ctx->buf[i] ^= 0x36 ^ 0x5c; + if (ssh_digest_update(ctx->octx, ctx->buf, ctx->buf_len) < 0) + return -1; + explicit_bzero(ctx->buf, ctx->buf_len); + } + /* start with ictx */ + if (ssh_digest_copy_state(ctx->ictx, ctx->digest) < 0) + return -1; + return 0; +} + +int +ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen) +{ + return ssh_digest_update(ctx->digest, m, mlen); +} + +int +ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b) +{ + return ssh_digest_update_buffer(ctx->digest, b); +} + +int +ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen) +{ + size_t len; + + len = ssh_digest_bytes(ctx->alg); + if (dlen < len || + ssh_digest_final(ctx->digest, ctx->buf, len)) + return -1; + /* switch to octx */ + if (ssh_digest_copy_state(ctx->octx, ctx->digest) < 0 || + ssh_digest_update(ctx->digest, ctx->buf, len) < 0 || + ssh_digest_final(ctx->digest, d, dlen) < 0) + return -1; + return 0; +} + +void +ssh_hmac_free(struct ssh_hmac_ctx *ctx) +{ + if (ctx != NULL) { + ssh_digest_free(ctx->ictx); + ssh_digest_free(ctx->octx); + ssh_digest_free(ctx->digest); + if (ctx->buf) { + explicit_bzero(ctx->buf, ctx->buf_len); + free(ctx->buf); + } + explicit_bzero(ctx, sizeof(*ctx)); + free(ctx); + } +} + +#ifdef TEST + +/* cc -DTEST hmac.c digest.c buffer.c cleanup.c fatal.c log.c xmalloc.c -lcrypto */ +static void +hmac_test(void *key, size_t klen, void *m, size_t mlen, u_char *e, size_t elen) +{ + struct ssh_hmac_ctx *ctx; + size_t i; + u_char digest[16]; + + if ((ctx = ssh_hmac_start(SSH_DIGEST_MD5)) == NULL) + printf("ssh_hmac_start failed"); + if (ssh_hmac_init(ctx, key, klen) < 0 || + ssh_hmac_update(ctx, m, mlen) < 0 || + ssh_hmac_final(ctx, digest, sizeof(digest)) < 0) + printf("ssh_hmac_xxx failed"); + ssh_hmac_free(ctx); + + if (memcmp(e, digest, elen)) { + for (i = 0; i < elen; i++) + printf("[%zu] %2.2x %2.2x\n", i, e[i], digest[i]); + printf("mismatch\n"); + } else + printf("ok\n"); +} + +int +main(int argc, char **argv) +{ + /* try test vectors from RFC 2104 */ + + u_char key1[16] = { + 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, + 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb }; + u_char *data1 = "Hi There"; + u_char dig1[16] = { + 0x92, 0x94, 0x72, 0x7a, 0x36, 0x38, 0xbb, 0x1c, + 0x13, 0xf4, 0x8e, 0xf8, 0x15, 0x8b, 0xfc, 0x9d }; + + u_char *key2 = "Jefe"; + u_char *data2 = "what do ya want for nothing?"; + u_char dig2[16] = { + 0x75, 0x0c, 0x78, 0x3e, 0x6a, 0xb0, 0xb5, 0x03, + 0xea, 0xa8, 0x6e, 0x31, 0x0a, 0x5d, 0xb7, 0x38 }; + + u_char key3[16]; + u_char data3[50]; + u_char dig3[16] = { + 0x56, 0xbe, 0x34, 0x52, 0x1d, 0x14, 0x4c, 0x88, + 0xdb, 0xb8, 0xc7, 0x33, 0xf0, 0xe8, 0xb3, 0xf6 }; + memset(key3, 0xaa, sizeof(key3)); + memset(data3, 0xdd, sizeof(data3)); + + hmac_test(key1, sizeof(key1), data1, strlen(data1), dig1, sizeof(dig1)); + hmac_test(key2, strlen(key2), data2, strlen(data2), dig2, sizeof(dig2)); + hmac_test(key3, sizeof(key3), data3, sizeof(data3), dig3, sizeof(dig3)); + + return 0; +} + +#endif diff --git a/hmac.h b/hmac.h new file mode 100644 index 0000000..42b33d0 --- /dev/null +++ b/hmac.h @@ -0,0 +1,38 @@ +/* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm Exp $ */ +/* + * Copyright (c) 2014 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _HMAC_H +#define _HMAC_H + +/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */ +size_t ssh_hmac_bytes(int alg); + +struct sshbuf; +struct ssh_hmac_ctx; +struct ssh_hmac_ctx *ssh_hmac_start(int alg); + +/* Sets the state of the HMAC or resets the state if key == NULL */ +int ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen) + __attribute__((__bounded__(__buffer__, 2, 3))); +int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b); +int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen) + __attribute__((__bounded__(__buffer__, 2, 3))); +void ssh_hmac_free(struct ssh_hmac_ctx *ctx); + +#endif /* _HMAC_H */ diff --git a/hostfile.c b/hostfile.c index b6f924b..f5f2515 100644 --- a/hostfile.c +++ b/hostfile.c @@ -1,4 +1,4 @@ -/* $OpenBSD: hostfile.c,v 1.50 2010/12/04 13:31:37 djm Exp $ */ +/* $OpenBSD: hostfile.c,v 1.66 2015/05/04 06:10:48 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -39,32 +39,38 @@ #include "includes.h" #include +#include #include -#include -#include - +#include #include #include #include #include #include +#include +#include #include "xmalloc.h" #include "match.h" -#include "key.h" +#include "sshkey.h" #include "hostfile.h" #include "log.h" #include "misc.h" +#include "ssherr.h" +#include "digest.h" +#include "hmac.h" struct hostkeys { struct hostkey_entry *entries; u_int num_entries; }; +/* XXX hmac is too easy to dictionary attack; use bcrypt? */ + static int -extract_salt(const char *s, u_int l, char *salt, size_t salt_len) +extract_salt(const char *s, u_int l, u_char *salt, size_t salt_len) { char *p, *b64salt; u_int b64len; @@ -96,14 +102,14 @@ extract_salt(const char *s, u_int l, char *salt, size_t salt_len) b64salt[b64len] = '\0'; ret = __b64_pton(b64salt, salt, salt_len); - xfree(b64salt); + free(b64salt); if (ret == -1) { debug2("extract_salt: salt decode error"); return (-1); } - if (ret != SHA_DIGEST_LENGTH) { - debug2("extract_salt: expected salt len %d, got %d", - SHA_DIGEST_LENGTH, ret); + if (ret != (int)ssh_hmac_bytes(SSH_DIGEST_SHA1)) { + debug2("extract_salt: expected salt len %zd, got %d", + ssh_hmac_bytes(SSH_DIGEST_SHA1), ret); return (-1); } @@ -113,13 +119,13 @@ extract_salt(const char *s, u_int l, char *salt, size_t salt_len) char * host_hash(const char *host, const char *name_from_hostfile, u_int src_len) { - const EVP_MD *md = EVP_sha1(); - HMAC_CTX mac_ctx; - char salt[256], result[256], uu_salt[512], uu_result[512]; + struct ssh_hmac_ctx *ctx; + u_char salt[256], result[256]; + char uu_salt[512], uu_result[512]; static char encoded[1024]; u_int i, len; - len = EVP_MD_size(md); + len = ssh_digest_bytes(SSH_DIGEST_SHA1); if (name_from_hostfile == NULL) { /* Create new salt */ @@ -132,14 +138,16 @@ host_hash(const char *host, const char *name_from_hostfile, u_int src_len) return (NULL); } - HMAC_Init(&mac_ctx, salt, len, md); - HMAC_Update(&mac_ctx, host, strlen(host)); - HMAC_Final(&mac_ctx, result, NULL); - HMAC_cleanup(&mac_ctx); + if ((ctx = ssh_hmac_start(SSH_DIGEST_SHA1)) == NULL || + ssh_hmac_init(ctx, salt, len) < 0 || + ssh_hmac_update(ctx, host, strlen(host)) < 0 || + ssh_hmac_final(ctx, result, sizeof(result))) + fatal("%s: ssh_hmac failed", __func__); + ssh_hmac_free(ctx); if (__b64_ntop(salt, len, uu_salt, sizeof(uu_salt)) == -1 || __b64_ntop(result, len, uu_result, sizeof(uu_result)) == -1) - fatal("host_hash: __b64_ntop failed"); + fatal("%s: __b64_ntop failed", __func__); snprintf(encoded, sizeof(encoded), "%s%s%c%s", HASH_MAGIC, uu_salt, HASH_DELIM, uu_result); @@ -153,15 +161,16 @@ host_hash(const char *host, const char *name_from_hostfile, u_int src_len) */ int -hostfile_read_key(char **cpp, u_int *bitsp, Key *ret) +hostfile_read_key(char **cpp, u_int *bitsp, struct sshkey *ret) { char *cp; + int r; /* Skip leading whitespace. */ for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++) ; - if (key_read(ret, &cp) != 1) + if ((r = sshkey_read(ret, &cp)) != 0) return 0; /* Skip trailing whitespace. */ @@ -171,23 +180,7 @@ hostfile_read_key(char **cpp, u_int *bitsp, Key *ret) /* Return results. */ *cpp = cp; if (bitsp != NULL) - *bitsp = key_size(ret); - return 1; -} - -static int -hostfile_check_key(int bits, const Key *key, const char *host, - const char *filename, u_long linenum) -{ - if (key == NULL || key->type != KEY_RSA1 || key->rsa == NULL) - return 1; - if (bits != BN_num_bits(key->rsa->n)) { - logit("Warning: %s, line %lu: keysize mismatch for host %s: " - "actual %d vs. announced %d.", - filename, linenum, host, BN_num_bits(key->rsa->n), bits); - logit("Warning: replace %d with %d in %s, line %lu.", - bits, BN_num_bits(key->rsa->n), filename, linenum); - } + *bitsp = sshkey_size(ret); return 1; } @@ -235,91 +228,66 @@ init_hostkeys(void) return ret; } +struct load_callback_ctx { + const char *host; + u_long num_loaded; + struct hostkeys *hostkeys; +}; + +static int +record_hostkey(struct hostkey_foreach_line *l, void *_ctx) +{ + struct load_callback_ctx *ctx = (struct load_callback_ctx *)_ctx; + struct hostkeys *hostkeys = ctx->hostkeys; + struct hostkey_entry *tmp; + + if (l->status == HKF_STATUS_INVALID) { + /* XXX make this verbose() in the future */ + debug("%s:%ld: parse error in hostkeys file", + l->path, l->linenum); + return 0; + } + + debug3("%s: found %skey type %s in file %s:%lu", __func__, + l->marker == MRK_NONE ? "" : + (l->marker == MRK_CA ? "ca " : "revoked "), + sshkey_type(l->key), l->path, l->linenum); + if ((tmp = reallocarray(hostkeys->entries, + hostkeys->num_entries + 1, sizeof(*hostkeys->entries))) == NULL) + return SSH_ERR_ALLOC_FAIL; + hostkeys->entries = tmp; + hostkeys->entries[hostkeys->num_entries].host = xstrdup(ctx->host); + hostkeys->entries[hostkeys->num_entries].file = xstrdup(l->path); + hostkeys->entries[hostkeys->num_entries].line = l->linenum; + hostkeys->entries[hostkeys->num_entries].key = l->key; + l->key = NULL; /* steal it */ + hostkeys->entries[hostkeys->num_entries].marker = l->marker; + hostkeys->num_entries++; + ctx->num_loaded++; + + return 0; +} + void load_hostkeys(struct hostkeys *hostkeys, const char *host, const char *path) { - FILE *f; - char line[8192]; - u_long linenum = 0, num_loaded = 0; - char *cp, *cp2, *hashed_host; - HostkeyMarker marker; - Key *key; - int kbits; + int r; + struct load_callback_ctx ctx; - if ((f = fopen(path, "r")) == NULL) - return; - debug3("%s: loading entries for host \"%.100s\" from file \"%s\"", - __func__, host, path); - while (read_keyfile_line(f, path, line, sizeof(line), &linenum) == 0) { - cp = line; + ctx.host = host; + ctx.num_loaded = 0; + ctx.hostkeys = hostkeys; - /* Skip any leading whitespace, comments and empty lines. */ - for (; *cp == ' ' || *cp == '\t'; cp++) - ; - if (!*cp || *cp == '#' || *cp == '\n') - continue; - - if ((marker = check_markers(&cp)) == MRK_ERROR) { - verbose("%s: invalid marker at %s:%lu", - __func__, path, linenum); - continue; - } - - /* Find the end of the host name portion. */ - for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++) - ; - - /* Check if the host name matches. */ - if (match_hostname(host, cp, (u_int) (cp2 - cp)) != 1) { - if (*cp != HASH_DELIM) - continue; - hashed_host = host_hash(host, cp, (u_int) (cp2 - cp)); - if (hashed_host == NULL) { - debug("Invalid hashed host line %lu of %s", - linenum, path); - continue; - } - if (strncmp(hashed_host, cp, (u_int) (cp2 - cp)) != 0) - continue; - } - - /* Got a match. Skip host name. */ - cp = cp2; - - /* - * Extract the key from the line. This will skip any leading - * whitespace. Ignore badly formatted lines. - */ - key = key_new(KEY_UNSPEC); - if (!hostfile_read_key(&cp, &kbits, key)) { - key_free(key); - key = key_new(KEY_RSA1); - if (!hostfile_read_key(&cp, &kbits, key)) { - key_free(key); - continue; - } - } - if (!hostfile_check_key(kbits, key, host, path, linenum)) - continue; - - debug3("%s: found %skey type %s in file %s:%lu", __func__, - marker == MRK_NONE ? "" : - (marker == MRK_CA ? "ca " : "revoked "), - key_type(key), path, linenum); - hostkeys->entries = xrealloc(hostkeys->entries, - hostkeys->num_entries + 1, sizeof(*hostkeys->entries)); - hostkeys->entries[hostkeys->num_entries].host = xstrdup(host); - hostkeys->entries[hostkeys->num_entries].file = xstrdup(path); - hostkeys->entries[hostkeys->num_entries].line = linenum; - hostkeys->entries[hostkeys->num_entries].key = key; - hostkeys->entries[hostkeys->num_entries].marker = marker; - hostkeys->num_entries++; - num_loaded++; + if ((r = hostkeys_foreach(path, record_hostkey, &ctx, host, NULL, + HKF_WANT_MATCH|HKF_WANT_PARSE_KEY)) != 0) { + if (r != SSH_ERR_SYSTEM_ERROR && errno != ENOENT) + debug("%s: hostkeys_foreach failed for %s: %s", + __func__, path, ssh_err(r)); } - debug3("%s: loaded %lu keys", __func__, num_loaded); - fclose(f); - return; -} + if (ctx.num_loaded != 0) + debug3("%s: loaded %lu keys from %s", __func__, + ctx.num_loaded, host); +} void free_hostkeys(struct hostkeys *hostkeys) @@ -327,31 +295,29 @@ free_hostkeys(struct hostkeys *hostkeys) u_int i; for (i = 0; i < hostkeys->num_entries; i++) { - xfree(hostkeys->entries[i].host); - xfree(hostkeys->entries[i].file); - key_free(hostkeys->entries[i].key); - bzero(hostkeys->entries + i, sizeof(*hostkeys->entries)); + free(hostkeys->entries[i].host); + free(hostkeys->entries[i].file); + sshkey_free(hostkeys->entries[i].key); + explicit_bzero(hostkeys->entries + i, sizeof(*hostkeys->entries)); } - if (hostkeys->entries != NULL) - xfree(hostkeys->entries); - hostkeys->entries = NULL; - hostkeys->num_entries = 0; - xfree(hostkeys); + free(hostkeys->entries); + explicit_bzero(hostkeys, sizeof(*hostkeys)); + free(hostkeys); } static int -check_key_not_revoked(struct hostkeys *hostkeys, Key *k) +check_key_not_revoked(struct hostkeys *hostkeys, struct sshkey *k) { - int is_cert = key_is_cert(k); + int is_cert = sshkey_is_cert(k); u_int i; for (i = 0; i < hostkeys->num_entries; i++) { if (hostkeys->entries[i].marker != MRK_REVOKE) continue; - if (key_equal_public(k, hostkeys->entries[i].key)) + if (sshkey_equal_public(k, hostkeys->entries[i].key)) return -1; if (is_cert && - key_equal_public(k->cert->signature_key, + sshkey_equal_public(k->cert->signature_key, hostkeys->entries[i].key)) return -1; } @@ -375,11 +341,11 @@ check_key_not_revoked(struct hostkeys *hostkeys, Key *k) */ static HostStatus check_hostkeys_by_key_or_type(struct hostkeys *hostkeys, - Key *k, int keytype, const struct hostkey_entry **found) + struct sshkey *k, int keytype, const struct hostkey_entry **found) { u_int i; HostStatus end_return = HOST_NEW; - int want_cert = key_is_cert(k); + int want_cert = sshkey_is_cert(k); HostkeyMarker want_marker = want_cert ? MRK_CA : MRK_NONE; int proto = (k ? k->type : keytype) == KEY_RSA1 ? 1 : 2; @@ -403,7 +369,7 @@ check_hostkeys_by_key_or_type(struct hostkeys *hostkeys, break; } if (want_cert) { - if (key_equal_public(k->cert->signature_key, + if (sshkey_equal_public(k->cert->signature_key, hostkeys->entries[i].key)) { /* A matching CA exists */ end_return = HOST_OK; @@ -412,7 +378,7 @@ check_hostkeys_by_key_or_type(struct hostkeys *hostkeys, break; } } else { - if (key_equal(k, hostkeys->entries[i].key)) { + if (sshkey_equal(k, hostkeys->entries[i].key)) { end_return = HOST_OK; if (found != NULL) *found = hostkeys->entries + i; @@ -431,9 +397,9 @@ check_hostkeys_by_key_or_type(struct hostkeys *hostkeys, } return end_return; } - + HostStatus -check_key_in_hostkeys(struct hostkeys *hostkeys, Key *key, +check_key_in_hostkeys(struct hostkeys *hostkeys, struct sshkey *key, const struct hostkey_entry **found) { if (key == NULL) @@ -449,40 +415,443 @@ lookup_key_in_hostkeys_by_type(struct hostkeys *hostkeys, int keytype, found) == HOST_FOUND); } +static int +write_host_entry(FILE *f, const char *host, const char *ip, + const struct sshkey *key, int store_hash) +{ + int r, success = 0; + char *hashed_host = NULL; + + if (store_hash) { + if ((hashed_host = host_hash(host, NULL, 0)) == NULL) { + error("%s: host_hash failed", __func__); + return 0; + } + fprintf(f, "%s ", hashed_host); + } else if (ip != NULL) + fprintf(f, "%s,%s ", host, ip); + else + fprintf(f, "%s ", host); + + if ((r = sshkey_write(key, f)) == 0) + success = 1; + else + error("%s: sshkey_write failed: %s", __func__, ssh_err(r)); + fputc('\n', f); + return success; +} + /* * Appends an entry to the host file. Returns false if the entry could not * be appended. */ - int -add_host_to_hostfile(const char *filename, const char *host, const Key *key, - int store_hash) +add_host_to_hostfile(const char *filename, const char *host, + const struct sshkey *key, int store_hash) { FILE *f; - int success = 0; - char *hashed_host = NULL; + int success; if (key == NULL) return 1; /* XXX ? */ f = fopen(filename, "a"); if (!f) return 0; - - if (store_hash) { - if ((hashed_host = host_hash(host, NULL, 0)) == NULL) { - error("add_host_to_hostfile: host_hash failed"); - fclose(f); - return 0; - } - } - fprintf(f, "%s ", store_hash ? hashed_host : host); - - if (key_write(key, f)) { - success = 1; - } else { - error("add_host_to_hostfile: saving key in %s failed", filename); - } - fprintf(f, "\n"); + success = write_host_entry(f, host, NULL, key, store_hash); fclose(f); return success; } + +struct host_delete_ctx { + FILE *out; + int quiet; + const char *host; + int *skip_keys; /* XXX split for host/ip? might want to ensure both */ + struct sshkey * const *keys; + size_t nkeys; + int modified; +}; + +static int +host_delete(struct hostkey_foreach_line *l, void *_ctx) +{ + struct host_delete_ctx *ctx = (struct host_delete_ctx *)_ctx; + int loglevel = ctx->quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_VERBOSE; + size_t i; + + if (l->status == HKF_STATUS_MATCHED) { + if (l->marker != MRK_NONE) { + /* Don't remove CA and revocation lines */ + fprintf(ctx->out, "%s\n", l->line); + return 0; + } + + /* XXX might need a knob for this later */ + /* Don't remove RSA1 keys */ + if (l->key->type == KEY_RSA1) { + fprintf(ctx->out, "%s\n", l->line); + return 0; + } + + /* + * If this line contains one of the keys that we will be + * adding later, then don't change it and mark the key for + * skipping. + */ + for (i = 0; i < ctx->nkeys; i++) { + if (sshkey_equal(ctx->keys[i], l->key)) { + ctx->skip_keys[i] = 1; + fprintf(ctx->out, "%s\n", l->line); + debug3("%s: %s key already at %s:%ld", __func__, + sshkey_type(l->key), l->path, l->linenum); + return 0; + } + } + + /* + * Hostname matches and has no CA/revoke marker, delete it + * by *not* writing the line to ctx->out. + */ + do_log2(loglevel, "%s%s%s:%ld: Removed %s key for host %s", + ctx->quiet ? __func__ : "", ctx->quiet ? ": " : "", + l->path, l->linenum, sshkey_type(l->key), ctx->host); + ctx->modified = 1; + return 0; + } + /* Retain non-matching hosts and invalid lines when deleting */ + if (l->status == HKF_STATUS_INVALID) { + do_log2(loglevel, "%s%s%s:%ld: invalid known_hosts entry", + ctx->quiet ? __func__ : "", ctx->quiet ? ": " : "", + l->path, l->linenum); + } + fprintf(ctx->out, "%s\n", l->line); + return 0; +} + +int +hostfile_replace_entries(const char *filename, const char *host, const char *ip, + struct sshkey **keys, size_t nkeys, int store_hash, int quiet, int hash_alg) +{ + #ifndef WIN32_FIXME + int r, fd, oerrno = 0; + int loglevel = quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_VERBOSE; + struct host_delete_ctx ctx; + char *fp, *temp = NULL, *back = NULL; + mode_t omask; + size_t i; + + omask = umask(077); + + memset(&ctx, 0, sizeof(ctx)); + ctx.host = host; + ctx.quiet = quiet; + if ((ctx.skip_keys = calloc(nkeys, sizeof(*ctx.skip_keys))) == NULL) + return SSH_ERR_ALLOC_FAIL; + ctx.keys = keys; + ctx.nkeys = nkeys; + ctx.modified = 0; + + /* + * Prepare temporary file for in-place deletion. + */ + if ((r = asprintf(&temp, "%s.XXXXXXXXXXX", filename)) < 0 || + (r = asprintf(&back, "%s.old", filename)) < 0) { + r = SSH_ERR_ALLOC_FAIL; + goto fail; + } + + if ((fd = mkstemp(temp)) == -1) { + oerrno = errno; + error("%s: mkstemp: %s", __func__, strerror(oerrno)); + r = SSH_ERR_SYSTEM_ERROR; + goto fail; + } + if ((ctx.out = fdopen(fd, "w")) == NULL) { + oerrno = errno; + close(fd); + error("%s: fdopen: %s", __func__, strerror(oerrno)); + r = SSH_ERR_SYSTEM_ERROR; + goto fail; + } + + /* Remove all entries for the specified host from the file */ + if ((r = hostkeys_foreach(filename, host_delete, &ctx, host, ip, + HKF_WANT_PARSE_KEY)) != 0) { + error("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); + goto fail; + } + + /* Add the requested keys */ + for (i = 0; i < nkeys; i++) { + if (ctx.skip_keys[i]) + continue; + if ((fp = sshkey_fingerprint(keys[i], hash_alg, + SSH_FP_DEFAULT)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto fail; + } + do_log2(loglevel, "%s%sAdding new key for %s to %s: %s %s", + quiet ? __func__ : "", quiet ? ": " : "", host, filename, + sshkey_ssh_name(keys[i]), fp); + free(fp); + if (!write_host_entry(ctx.out, host, ip, keys[i], store_hash)) { + r = SSH_ERR_INTERNAL_ERROR; + goto fail; + } + ctx.modified = 1; + } + fclose(ctx.out); + ctx.out = NULL; + + if (ctx.modified) { + /* Backup the original file and replace it with the temporary */ + if (unlink(back) == -1 && errno != ENOENT) { + oerrno = errno; + error("%s: unlink %.100s: %s", __func__, + back, strerror(errno)); + r = SSH_ERR_SYSTEM_ERROR; + goto fail; + } + if (link(filename, back) == -1) { + oerrno = errno; + error("%s: link %.100s to %.100s: %s", __func__, + filename, back, strerror(errno)); + r = SSH_ERR_SYSTEM_ERROR; + goto fail; + } + if (rename(temp, filename) == -1) { + oerrno = errno; + error("%s: rename \"%s\" to \"%s\": %s", __func__, + temp, filename, strerror(errno)); + r = SSH_ERR_SYSTEM_ERROR; + goto fail; + } + } else { + /* No changes made; just delete the temporary file */ + if (unlink(temp) != 0) + error("%s: unlink \"%s\": %s", __func__, + temp, strerror(errno)); + } + + /* success */ + r = 0; + fail: + if (temp != NULL && r != 0) + unlink(temp); + free(temp); + free(back); + if (ctx.out != NULL) + fclose(ctx.out); + free(ctx.skip_keys); + umask(omask); + if (r == SSH_ERR_SYSTEM_ERROR) + errno = oerrno; + return r; +#else + //PRAGMA:TODO + return 0; +#endif +} + +static int +match_maybe_hashed(const char *host, const char *names, int *was_hashed) +{ + int hashed = *names == HASH_DELIM; + const char *hashed_host; + size_t nlen = strlen(names); + + if (was_hashed != NULL) + *was_hashed = hashed; + if (hashed) { + if ((hashed_host = host_hash(host, names, nlen)) == NULL) + return -1; + return nlen == strlen(hashed_host) && + strncmp(hashed_host, names, nlen) == 0; + } + return match_hostname(host, names) == 1; +} + +int +hostkeys_foreach(const char *path, hostkeys_foreach_fn *callback, void *ctx, + const char *host, const char *ip, u_int options) +{ + FILE *f; + char line[8192], oline[8192], ktype[128]; + u_long linenum = 0; + char *cp, *cp2; + u_int kbits; + int hashed; + int s, r = 0; + struct hostkey_foreach_line lineinfo; + size_t l; + + memset(&lineinfo, 0, sizeof(lineinfo)); + if (host == NULL && (options & HKF_WANT_MATCH) != 0) + return SSH_ERR_INVALID_ARGUMENT; + if ((f = fopen(path, "r")) == NULL) + return SSH_ERR_SYSTEM_ERROR; + + debug3("%s: reading file \"%s\"", __func__, path); + while (read_keyfile_line(f, path, line, sizeof(line), &linenum) == 0) { + line[strcspn(line, "\n")] = '\0'; + strlcpy(oline, line, sizeof(oline)); + + sshkey_free(lineinfo.key); + memset(&lineinfo, 0, sizeof(lineinfo)); + lineinfo.path = path; + lineinfo.linenum = linenum; + lineinfo.line = oline; + lineinfo.marker = MRK_NONE; + lineinfo.status = HKF_STATUS_OK; + lineinfo.keytype = KEY_UNSPEC; + + /* Skip any leading whitespace, comments and empty lines. */ + for (cp = line; *cp == ' ' || *cp == '\t'; cp++) + ; + if (!*cp || *cp == '#' || *cp == '\n') { + if ((options & HKF_WANT_MATCH) == 0) { + lineinfo.status = HKF_STATUS_COMMENT; + if ((r = callback(&lineinfo, ctx)) != 0) + break; + } + continue; + } + + if ((lineinfo.marker = check_markers(&cp)) == MRK_ERROR) { + verbose("%s: invalid marker at %s:%lu", + __func__, path, linenum); + if ((options & HKF_WANT_MATCH) == 0) + goto bad; + continue; + } + + /* Find the end of the host name portion. */ + for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++) + ; + lineinfo.hosts = cp; + *cp2++ = '\0'; + + /* Check if the host name matches. */ + if (host != NULL) { + if ((s = match_maybe_hashed(host, lineinfo.hosts, + &hashed)) == -1) { + debug2("%s: %s:%ld: bad host hash \"%.32s\"", + __func__, path, linenum, lineinfo.hosts); + goto bad; + } + if (s == 1) { + lineinfo.status = HKF_STATUS_MATCHED; + lineinfo.match |= HKF_MATCH_HOST | + (hashed ? HKF_MATCH_HOST_HASHED : 0); + } + /* Try matching IP address if supplied */ + if (ip != NULL) { + if ((s = match_maybe_hashed(ip, lineinfo.hosts, + &hashed)) == -1) { + debug2("%s: %s:%ld: bad ip hash " + "\"%.32s\"", __func__, path, + linenum, lineinfo.hosts); + goto bad; + } + if (s == 1) { + lineinfo.status = HKF_STATUS_MATCHED; + lineinfo.match |= HKF_MATCH_IP | + (hashed ? HKF_MATCH_IP_HASHED : 0); + } + } + /* + * Skip this line if host matching requested and + * neither host nor address matched. + */ + if ((options & HKF_WANT_MATCH) != 0 && + lineinfo.status != HKF_STATUS_MATCHED) + continue; + } + + /* Got a match. Skip host name and any following whitespace */ + for (; *cp2 == ' ' || *cp2 == '\t'; cp2++) + ; + if (*cp2 == '\0' || *cp2 == '#') { + debug2("%s:%ld: truncated before key type", + path, linenum); + goto bad; + } + lineinfo.rawkey = cp = cp2; + + if ((options & HKF_WANT_PARSE_KEY) != 0) { + /* + * Extract the key from the line. This will skip + * any leading whitespace. Ignore badly formatted + * lines. + */ + if ((lineinfo.key = sshkey_new(KEY_UNSPEC)) == NULL) { + error("%s: sshkey_new failed", __func__); + r = SSH_ERR_ALLOC_FAIL; + break; + } + if (!hostfile_read_key(&cp, &kbits, lineinfo.key)) { +#ifdef WITH_SSH1 + sshkey_free(lineinfo.key); + lineinfo.key = sshkey_new(KEY_RSA1); + if (lineinfo.key == NULL) { + error("%s: sshkey_new fail", __func__); + r = SSH_ERR_ALLOC_FAIL; + break; + } + if (!hostfile_read_key(&cp, &kbits, + lineinfo.key)) + goto bad; +#else + goto bad; +#endif + } + lineinfo.keytype = lineinfo.key->type; + lineinfo.comment = cp; + } else { + /* Extract and parse key type */ + l = strcspn(lineinfo.rawkey, " \t"); + if (l <= 1 || l >= sizeof(ktype) || + lineinfo.rawkey[l] == '\0') + goto bad; + memcpy(ktype, lineinfo.rawkey, l); + ktype[l] = '\0'; + lineinfo.keytype = sshkey_type_from_name(ktype); + + /* + * Assume RSA1 if the first component is a short + * decimal number. + */ + if (lineinfo.keytype == KEY_UNSPEC && l < 8 && + strspn(ktype, "0123456789") == l) + lineinfo.keytype = KEY_RSA1; + + /* + * Check that something other than whitespace follows + * the key type. This won't catch all corruption, but + * it does catch trivial truncation. + */ + cp2 += l; /* Skip past key type */ + for (; *cp2 == ' ' || *cp2 == '\t'; cp2++) + ; + if (*cp2 == '\0' || *cp2 == '#') { + debug2("%s:%ld: truncated after key type", + path, linenum); + lineinfo.keytype = KEY_UNSPEC; + } + if (lineinfo.keytype == KEY_UNSPEC) { + bad: + sshkey_free(lineinfo.key); + lineinfo.key = NULL; + lineinfo.status = HKF_STATUS_INVALID; + if ((r = callback(&lineinfo, ctx)) != 0) + break; + continue; + } + } + if ((r = callback(&lineinfo, ctx)) != 0) + break; + } + sshkey_free(lineinfo.key); + fclose(f); + return r; +} diff --git a/hostfile.h b/hostfile.h index d84d422..bd21043 100644 --- a/hostfile.h +++ b/hostfile.h @@ -1,4 +1,4 @@ -/* $OpenBSD: hostfile.h,v 1.19 2010/11/29 23:45:51 djm Exp $ */ +/* $OpenBSD: hostfile.h,v 1.24 2015/02/16 22:08:57 djm Exp $ */ /* * Author: Tatu Ylonen @@ -26,7 +26,7 @@ struct hostkey_entry { char *host; char *file; u_long line; - Key *key; + struct sshkey *key; HostkeyMarker marker; }; struct hostkeys; @@ -35,13 +35,18 @@ struct hostkeys *init_hostkeys(void); void load_hostkeys(struct hostkeys *, const char *, const char *); void free_hostkeys(struct hostkeys *); -HostStatus check_key_in_hostkeys(struct hostkeys *, Key *, +HostStatus check_key_in_hostkeys(struct hostkeys *, struct sshkey *, const struct hostkey_entry **); int lookup_key_in_hostkeys_by_type(struct hostkeys *, int, const struct hostkey_entry **); -int hostfile_read_key(char **, u_int *, Key *); -int add_host_to_hostfile(const char *, const char *, const Key *, int); +int hostfile_read_key(char **, u_int *, struct sshkey *); +int add_host_to_hostfile(const char *, const char *, + const struct sshkey *, int); + +int hostfile_replace_entries(const char *filename, + const char *host, const char *ip, struct sshkey **keys, size_t nkeys, + int store_hash, int quiet, int hash_alg); #define HASH_MAGIC "|1|" #define HASH_DELIM '|' @@ -51,4 +56,53 @@ int add_host_to_hostfile(const char *, const char *, const Key *, int); char *host_hash(const char *, const char *, u_int); +/* + * Iterate through a hostkeys file, optionally parsing keys and matching + * hostnames. Allows access to the raw keyfile lines to allow + * streaming edits to the file to take place. + */ +#define HKF_WANT_MATCH (1) /* return only matching hosts/addrs */ +#define HKF_WANT_PARSE_KEY (1<<1) /* need key parsed */ + +#define HKF_STATUS_OK 0 /* Line parsed, didn't match host */ +#define HKF_STATUS_INVALID 1 /* line had parse error */ +#define HKF_STATUS_COMMENT 2 /* valid line contained no key */ +#define HKF_STATUS_MATCHED 3 /* hostname or IP matched */ + +#define HKF_MATCH_HOST (1) /* hostname matched */ +#define HKF_MATCH_IP (1<<1) /* address matched */ +#define HKF_MATCH_HOST_HASHED (1<<2) /* hostname was hashed */ +#define HKF_MATCH_IP_HASHED (1<<3) /* address was hashed */ +/* XXX HKF_MATCH_KEY_TYPE? */ + +/* + * The callback function receives this as an argument for each matching + * hostkey line. The callback may "steal" the 'key' field by setting it to NULL. + * If a parse error occurred, then "hosts" and subsequent options may be NULL. + */ +struct hostkey_foreach_line { + const char *path; /* Path of file */ + u_long linenum; /* Line number */ + u_int status; /* One of HKF_STATUS_* */ + u_int match; /* Zero or more of HKF_MATCH_* OR'd together */ + char *line; /* Entire key line; mutable by callback */ + int marker; /* CA/revocation markers; indicated by MRK_* value */ + const char *hosts; /* Raw hosts text, may be hashed or list multiple */ + const char *rawkey; /* Text of key and any comment following it */ + int keytype; /* Type of key; KEY_UNSPEC for invalid/comment lines */ + struct sshkey *key; /* Key, if parsed ok and HKF_WANT_MATCH_HOST set */ + const char *comment; /* Any comment following the key */ +}; + +/* + * Callback fires for each line (or matching line if a HKF_WANT_* option + * is set). The foreach loop will terminate if the callback returns a non- + * zero exit status. + */ +typedef int hostkeys_foreach_fn(struct hostkey_foreach_line *l, void *ctx); + +/* Iterate over a hostkeys file */ +int hostkeys_foreach(const char *path, hostkeys_foreach_fn *callback, void *ctx, + const char *host, const char *ip, u_int options); + #endif diff --git a/id_dsa b/id_dsa new file mode 100644 index 0000000..c236aab --- /dev/null +++ b/id_dsa @@ -0,0 +1,12 @@ +-----BEGIN DSA PRIVATE KEY----- +MIIBuwIBAAKBgQC8GRz9p5YiVi9BA7jNO3MXV2NkPlMfCv2xjieBE6bflmHKoKhC +ewlyrk1SfLJQgVbOZvdrgtsuYGgKfpqu8qWlVnEHOLYSa6f6CDcjRXa5X+T2+tBZ +zYZ7UBlEFuDLoCEpSOopsDzPz+wvyGBH7/DPtHhbLB/ipIZYXMe/QXcyFwIVAIA9 +pz8MNAL+c9x9cNW9V40GIlnBAoGAWXg5YYAHb/+ZRHXBTTULmY8LT8Mhp8JDrIWY +TE+JHlFmGtHJsajoQNo5yFCj6ep1YqeKSZdj3x0JXSJDLLQNuiaGL74MdEasYt3g +rG04HE7k3tXfSwSM0cKhSFU/MKo9rhXStRcKdG5ZN4d+pTnoyV/ncfooiRJprqXH +l4yv2vMCgYEAp8OaX5N4UtY0KID34SNj5b3hsAoK5IZ3mBsX7Ngg6Rbnr7h2s5sK +sus5FiMtmymVssY84YZTRVP6oZWSShG/WOcUQrzo8zxKH9cj6pc/haSraTakSXLK +bbsI2Bj1nMYmXZxSelLUZS0Xwsp3EVxxLYmrzduXyV3ewvrHFZ1q6jsCFH3IbB4V +XAMosp5QzPxxeQQtAjVD +-----END DSA PRIVATE KEY----- diff --git a/id_dsa.pub b/id_dsa.pub new file mode 100644 index 0000000..58f8ff4 --- /dev/null +++ b/id_dsa.pub @@ -0,0 +1 @@ +ssh-dss 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 @oasis diff --git a/id_rsa b/id_rsa new file mode 100644 index 0000000..c58bc9d --- /dev/null +++ b/id_rsa @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEowIBAAKCAQEAupkFt/flL8uwzwiXemhydEVw5y/jQu1bAvklAL6LMjMG9z68 +YxaG8iduMpehxKXR75pWzZIqTm3sN0/3azUNECvx+Frf+5pCHcTeiGxfYaRWi7fB +cndMne3KXcRh42FRI7lAR4LDiP9pNld82cf3N9V/O2Y8G9fCTPAyjZP3sCgY9TGV +Q3AXSFkE+VjkT5qQlVewnixNU4l3OW9v9sDTjgXSj7g2AQxnT0oag/dSGl5iLPSh +VKOIxQRP1fiun3rFJ4LnZ6LinYRc0qJKF2yKRTcouS9k1EbUvXm8JtGZGs9sVvOg +yem0jLbjKoVA7CTmRZh4fDZ08Lkgz1FV4Zc22QIDAQABAoIBAGkkUFSZGksUO0xt +Su1ubQ+XEUczdJsBo4bJXFBPDZ/7oLEwaHZs+xz3muBnEH/9741TKhYrhisrRS7l +oESIYBP8rxuCGTNseFTN2ZaFejlKoHmZ0Sbukf1rP9wWDBJTg6TdfZrN0+AeCurT +4UXVpzeO1WJi+Pu3V4SC0/lypt5aw2F1urfoWSaUR43xiYpnjMNQ6dDvVoXA4R2X +lMvvdAimTyA3XFDQILlUz6UHH01nEDO6n3T7VjB8UxiJrV5Oyy/aREBIJRiEHf5t +dkZjVmtoKhAxKsOCyne/BZ3G1dYIGAhEM/SPqMQtPWy7U95ZaKQbF/Y5BhZb+5d6 +88HG6QECgYEA3VXddhNh8Ore1rrmlG/5/hwFg9BfP74Gt+lZcmT1Gwh9EBdcn3he +xn4kBiw3m1kYyJw3wUfg/zINerqPz57EV669aVaDOVXbqTsFHOsFa74wMERYfV+/ +eBn7lFdwxOXq4vfDMzq0Ph+wtFvA+C2IkQVk60PR94dJMTn5VLm26nsCgYEA19Jm +Hfvm/P/9oc4+rtkTUrs5BDHloBJ28TydZ84bI4B4n1/pJOWKrZ4y4kATic00+otW +sncOVAeFq7Nj8yJ1XRCxKnjbhR2q/FZQf8f0c5xVWh4iXRt6Zf5hVcCmkle8SV6M +vQb5zpRbzQTx+nrbut6RMbQPVHy5BIXhdzIeHbsCgYAik41bKr/8INTa+quWuL93 +AO2jn+OhU5A9HskIY9kedf8DioK/rtAvdfkuta2iKRMEE9Np8E6nzyvn5kkdCBJo +GDYixI8PX+hG0Z+E2von0Lg6chLY0yJYIsb4b4iAWeKNvmLSF/OcWNsD8el9W6+f +6BXR4vBkGNBITmQy5ig7DQKBgQCcfVLOKvkyOewOhx2sano4YsjU4dk+WCUmhm0b +97Z155GO/lxvBIGpoiwDIbMJGGJxyNb0UJ9zDoE+HrU6dqHi+Vd9FGUYAIsarPtx +q+r0aUb6MR95o5L8oZayNx6Qvk0oZgZmichYofpujkdm9+6bcQaWo5j6CfWd8fWq +GAz+QQKBgHBOyyzXC7HSy+IAu/Jo3kpkgTqjYUIsmig5QKamHo/5FP8FCq4ZVR1L +CYrpCVzbvjAjBnSm1/3UngjS3PPldUYjGIbez3gK/jJTfnzfsVghnQsZOd97YxuX +TusifzCTcDZEUIZSdxL72EpbGtkYqVeDl4SjU0ZMfSIyiEsfyDFw +-----END RSA PRIVATE KEY----- diff --git a/id_rsa.pub b/id_rsa.pub new file mode 100644 index 0000000..d064585 --- /dev/null +++ b/id_rsa.pub @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC6mQW39+Uvy7DPCJd6aHJ0RXDnL+NC7VsC+SUAvosyMwb3PrxjFobyJ24yl6HEpdHvmlbNkipObew3T/drNQ0QK/H4Wt/7mkIdxN6IbF9hpFaLt8Fyd0yd7cpdxGHjYVEjuUBHgsOI/2k2V3zZx/c31X87Zjwb18JM8DKNk/ewKBj1MZVDcBdIWQT5WORPmpCVV7CeLE1TiXc5b2/2wNOOBdKPuDYBDGdPShqD91IaXmIs9KFUo4jFBE/V+K6fesUngudnouKdhFzSokoXbIpFNyi5L2TURtS9ebwm0Zkaz2xW86DJ6bSMtuMqhUDsJOZFmHh8NnTwuSDPUVXhlzbZ @oasis diff --git a/includes.h b/includes.h index 42723ca..aba441a 100644 --- a/includes.h +++ b/includes.h @@ -18,7 +18,9 @@ #include "config.h" +#ifndef _GNU_SOURCE #define _GNU_SOURCE /* activate extra prototypes for glibc */ +#endif #ifdef WIN32 #undef __USE_W32_SOCKETS @@ -27,10 +29,11 @@ #endif #include +#include #include /* For CMSG_* */ #ifdef HAVE_LIMITS_H -# include /* For PATH_MAX */ +# include /* For PATH_MAX, _POSIX_HOST_NAME_MAX */ #endif #ifdef HAVE_BSTRING_H # include @@ -143,8 +146,10 @@ # include #endif -#ifdef HAVE_LIBUTIL_H -# include /* Openpty on FreeBSD at least */ +#if defined(HAVE_BSD_LIBUTIL_H) +# include +#elif defined(HAVE_LIBUTIL_H) +# include #endif #if defined(KRB5) && defined(USE_AFS) @@ -168,7 +173,9 @@ # endif #endif +#ifdef WITH_OPENSSL #include /* For OPENSSL_VERSION_NUMBER */ +#endif #include "defines.h" diff --git a/is_rsa b/is_rsa new file mode 100644 index 0000000..e23f76c --- /dev/null +++ b/is_rsa @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpQIBAAKCAQEAnIuKMu05Sh8vXfPuLJYZuujMxPYWhm2rCN1sLei6q7yul9I7 +VQgPtOJwVqAR+5vvFCa3epqpXUrDlRE4mRS5uLDZfeTJioq1h5qEnictdsMqL0F2 +JMmER9E+CdpQ52uiW4Aj7mmaYCKvPLMW/2fEVX/X40rXemjSMjPeQWpUZy/N/ZmC +cV6XzzTAZFxhA98P5uUuhoMV/Faz9XAujfpF2qOZ8nLWahWQEG7Y9dtiwHhTVjel +tBIcuZsdVRExSCPofb0idi8AzRza2AT1diDrSf7UPGo0qHOtGzbyYybYJXf4Xtyp +Zq4I7SnAuAJK9QZnoJvoiOKYNlYFJ6aHE3Q32wIDAQABAoIBAAg70qYBEi1S3JPt +e45+ypWpHvQRGXgylndd5g24GvFjeC9mEFbVmLXj3xK/UpLQTc/ahXX+YoAUqZrS +kA6FJ4uOSbI0cWFHEGs0dls3Jk4Dz9kycTtYGgwI9mFgSTcS0zRK1hj5FvSNfngL +117Rn2L72WgMDK9UihG35q28IPpYVUTN7W+qU5YdG9m5KutBjmq9lStc6eeHqMYH +EBo3WwMh43oBhcqbebowgQLIkQTcnVdDwsjT8GYEI7onH4SnQWapch7ogXERu34w +SDNhcQ5N4gSV/Urj5+RuA78s3eKb3zZMW3lLvmr4re6BZWa/E6XmYq8k2KAB12TX +5QaYqnECgYEAzlhlLMPXuOqcQp1O1TyVNxWwJ9Q8TqhLjnbFASLCzFU2E0lup0mH +2wK0cL8KhljT6rYzKFFp2ik5+1TzHKxEvnyzB89IJ3z/5e0AYssyv1oRnzMx9amg ++04BxP4iAo1Fs9xN60PhsjHfIBj8jH3EJcla0G/zY0JE510cDRCa/YkCgYEAwjdG +JBjva6vgwZiiZ5QoOmH0WIsOnNB5VjzOONXUrpYSNMBDGougnt9eOeyUbAGgPBLT +10eR9oR06DLacn/jw75u07NCBfqxTSdW+xziG54DnK24vONBS4KmbA/v4u1mMaIn +OxRfx++3lcOvrMeUqjA5ZrUUW5VXV/dNg0IStUMCgYEAxSEptzR6GMz576H9ODYi +j3eGzOYznymk1TueRdGBrFgTyyUyM1tKEO9qlvPMCEFAY1EhWnk82RDdtcCYaWIi +YqEbIHDki+UdS/m5jqh1mN1hTGhKaFlf0/XYNuxabXmth4EGZ6Z4Lhb7BN0aGNXl +1/ufaNYq/T7IOQh4zfp5N5ECgYEAgcpYmIUFc4owsJAlcF0FqUaO+aEsicWUYPpP +wpG8CVSHJDOcZKANHj8eBE3DPo6zm5Hlekf9FqacThS2AbDP8J9SBy4ToFVRqcLx +kO1TeatWtJ0wCSNCHolYWH0qDhgipGa+GvBZtg7QPEjDHQ9fnYCOy8GVskKSVVoS +tfYw9GsCgYEAjhgQ2pedGUGHdRY8upI7iQkGIAjsmNKExIIc7oPCiFO5d23XXsuV +lNjHie84Ty7mimuGn9kCX0GzJAHOJBV1cVAannZ+SA+PxcsIez3wAt1KxQIkfw6o +3vzanOICnGhZ22SFyib1h+0OveVXshJc3DeWlgiDxQN2Ox8BUN2KBFs= +-----END RSA PRIVATE KEY----- diff --git a/is_rsa.pub b/is_rsa.pub new file mode 100644 index 0000000..4e8153f --- /dev/null +++ b/is_rsa.pub @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCci4oy7TlKHy9d8+4slhm66MzE9haGbasI3Wwt6LqrvK6X0jtVCA+04nBWoBH7m+8UJrd6mqldSsOVETiZFLm4sNl95MmKirWHmoSeJy12wyovQXYkyYRH0T4J2lDna6JbgCPuaZpgIq88sxb/Z8RVf9fjStd6aNIyM95BalRnL839mYJxXpfPNMBkXGED3w/m5S6GgxX8VrP1cC6N+kXao5nyctZqFZAQbtj122LAeFNWN6W0Ehy5mx1VETFII+h9vSJ2LwDNHNrYBPV2IOtJ/tQ8ajSoc60bNvJjJtgld/he3KlmrgjtKcC4Akr1Bmegm+iI4pg2VgUnpocTdDfb @oasis diff --git a/kerberos-sspi.c b/kerberos-sspi.c index b2e1872..79fae4e 100644 --- a/kerberos-sspi.c +++ b/kerberos-sspi.c @@ -458,7 +458,7 @@ void input_sspi_kerberos_token(int type, u_int32_t plen, void *ctxt) error("ERROR: Cannot process SSH2_MSG_USERAUTH_GSSAPI_TOKEN packet."); } - xfree(buf); + free(buf); debug3("<- input_sspi_kerberos_token()..."); } @@ -497,8 +497,8 @@ void input_sspi_kerberos_error(int type, u_int32_t plen, void *ctxt) packet_check_eom(); - xfree(msg); - xfree(lang); + free(msg); + free(lang); debug3("<- input_sspi_kerberos_error()..."); } @@ -855,7 +855,7 @@ void input_sspi_kerberos_response(int type, u_int32_t plen, void *ctxt) userauth(auth, NULL); } - xfree(oid); + free(oid); debug3("<- input_sspi_kerberos_response()..."); } diff --git a/kex.c b/kex.c index c65e28f..5100c66 100644 --- a/kex.c +++ b/kex.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kex.c,v 1.86 2010/09/22 05:01:29 djm Exp $ */ +/* $OpenBSD: kex.c,v 1.109 2015/07/30 00:01:34 djm Exp $ */ /* * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. * @@ -25,7 +25,7 @@ #include "includes.h" -#include +#include /* MAX roundup */ #include #include @@ -33,23 +33,28 @@ #include #include +#ifdef WITH_OPENSSL #include +#endif -#include "xmalloc.h" #include "ssh2.h" -#include "buffer.h" #include "packet.h" #include "compat.h" #include "cipher.h" -#include "key.h" +#include "sshkey.h" #include "kex.h" #include "log.h" #include "mac.h" #include "match.h" +#include "misc.h" #include "dispatch.h" #include "monitor.h" #include "roaming.h" +#include "ssherr.h" +#include "sshbuf.h" +#include "digest.h" + #if OPENSSL_VERSION_NUMBER >= 0x00907000L # if defined(HAVE_EVP_SHA256) # define evp_ssh_sha256 EVP_sha256 @@ -59,8 +64,73 @@ extern const EVP_MD *evp_ssh_sha256(void); #endif /* prototype */ -static void kex_kexinit_finish(Kex *); -static void kex_choose_conf(Kex *); +static int kex_choose_conf(struct ssh *); +static int kex_input_newkeys(int, u_int32_t, void *); + +struct kexalg { + char *name; + u_int type; + int ec_nid; + int hash_alg; +}; +static const struct kexalg kexalgs[] = { +#ifdef WITH_OPENSSL + { KEX_DH1, KEX_DH_GRP1_SHA1, 0, SSH_DIGEST_SHA1 }, + { KEX_DH14, KEX_DH_GRP14_SHA1, 0, SSH_DIGEST_SHA1 }, + { KEX_DHGEX_SHA1, KEX_DH_GEX_SHA1, 0, SSH_DIGEST_SHA1 }, +#ifdef HAVE_EVP_SHA256 + { KEX_DHGEX_SHA256, KEX_DH_GEX_SHA256, 0, SSH_DIGEST_SHA256 }, +#endif /* HAVE_EVP_SHA256 */ +#ifdef OPENSSL_HAS_ECC + { KEX_ECDH_SHA2_NISTP256, KEX_ECDH_SHA2, + NID_X9_62_prime256v1, SSH_DIGEST_SHA256 }, + { KEX_ECDH_SHA2_NISTP384, KEX_ECDH_SHA2, NID_secp384r1, + SSH_DIGEST_SHA384 }, +# ifdef OPENSSL_HAS_NISTP521 + { KEX_ECDH_SHA2_NISTP521, KEX_ECDH_SHA2, NID_secp521r1, + SSH_DIGEST_SHA512 }, +# endif /* OPENSSL_HAS_NISTP521 */ +#endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ +#if defined(HAVE_EVP_SHA256) || !defined(WITH_OPENSSL) + { KEX_CURVE25519_SHA256, KEX_C25519_SHA256, 0, SSH_DIGEST_SHA256 }, +#endif /* HAVE_EVP_SHA256 || !WITH_OPENSSL */ + { NULL, -1, -1, -1}, +}; + +char * +kex_alg_list(char sep) +{ + char *ret = NULL, *tmp; + size_t nlen, rlen = 0; + const struct kexalg *k; + + for (k = kexalgs; k->name != NULL; k++) { + if (ret != NULL) + ret[rlen++] = sep; + nlen = strlen(k->name); + if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) { + free(ret); + return NULL; + } + ret = tmp; + memcpy(ret + rlen, k->name, nlen + 1); + rlen += nlen; + } + return ret; +} + +static const struct kexalg * +kex_alg_by_name(const char *name) +{ + const struct kexalg *k; + + for (k = kexalgs; k->name != NULL; k++) { + if (strcmp(k->name, name) == 0) + return k; + } + return NULL; +} /* Validate KEX method name list */ int @@ -70,258 +140,439 @@ kex_names_valid(const char *names) if (names == NULL || strcmp(names, "") == 0) return 0; - s = cp = xstrdup(names); + if ((s = cp = strdup(names)) == NULL) + return 0; for ((p = strsep(&cp, ",")); p && *p != '\0'; (p = strsep(&cp, ","))) { - if (strcmp(p, KEX_DHGEX_SHA256) != 0 && - strcmp(p, KEX_DHGEX_SHA1) != 0 && - strcmp(p, KEX_DH14) != 0 && - strcmp(p, KEX_DH1) != 0 && - (strncmp(p, KEX_ECDH_SHA2_STEM, - sizeof(KEX_ECDH_SHA2_STEM) - 1) != 0 || - kex_ecdh_name_to_nid(p) == -1)) { + if (kex_alg_by_name(p) == NULL) { error("Unsupported KEX algorithm \"%.100s\"", p); - xfree(s); + free(s); return 0; } } debug3("kex names ok: [%s]", names); - xfree(s); + free(s); return 1; } +/* + * Concatenate algorithm names, avoiding duplicates in the process. + * Caller must free returned string. + */ +char * +kex_names_cat(const char *a, const char *b) +{ + char *ret = NULL, *tmp = NULL, *cp, *p; + size_t len; + + if (a == NULL || *a == '\0') + return NULL; + if (b == NULL || *b == '\0') + return strdup(a); + if (strlen(b) > 1024*1024) + return NULL; + len = strlen(a) + strlen(b) + 2; + if ((tmp = cp = strdup(b)) == NULL || + (ret = calloc(1, len)) == NULL) { + free(tmp); + return NULL; + } + strlcpy(ret, a, len); + for ((p = strsep(&cp, ",")); p && *p != '\0'; (p = strsep(&cp, ","))) { + if (match_list(ret, p, NULL) != NULL) + continue; /* Algorithm already present */ + if (strlcat(ret, ",", len) >= len || + strlcat(ret, p, len) >= len) { + free(tmp); + free(ret); + return NULL; /* Shouldn't happen */ + } + } + free(tmp); + return ret; +} + +/* + * Assemble a list of algorithms from a default list and a string from a + * configuration file. The user-provided string may begin with '+' to + * indicate that it should be appended to the default. + */ +int +kex_assemble_names(const char *def, char **list) +{ + char *ret; + + if (list == NULL || *list == NULL || **list == '\0') { + *list = strdup(def); + return 0; + } + if (**list != '+') { + return 0; + } + + if ((ret = kex_names_cat(def, *list + 1)) == NULL) + return SSH_ERR_ALLOC_FAIL; + free(*list); + *list = ret; + return 0; +} + /* put algorithm proposal into buffer */ -static void -kex_prop2buf(Buffer *b, char *proposal[PROPOSAL_MAX]) +int +kex_prop2buf(struct sshbuf *b, char *proposal[PROPOSAL_MAX]) { u_int i; + int r; + + sshbuf_reset(b); - buffer_clear(b); /* * add a dummy cookie, the cookie will be overwritten by * kex_send_kexinit(), each time a kexinit is set */ - for (i = 0; i < KEX_COOKIE_LEN; i++) - buffer_put_char(b, 0); - for (i = 0; i < PROPOSAL_MAX; i++) - buffer_put_cstring(b, proposal[i]); - buffer_put_char(b, 0); /* first_kex_packet_follows */ - buffer_put_int(b, 0); /* uint32 reserved */ + for (i = 0; i < KEX_COOKIE_LEN; i++) { + if ((r = sshbuf_put_u8(b, 0)) != 0) + return r; + } + for (i = 0; i < PROPOSAL_MAX; i++) { + if ((r = sshbuf_put_cstring(b, proposal[i])) != 0) + return r; + } + if ((r = sshbuf_put_u8(b, 0)) != 0 || /* first_kex_packet_follows */ + (r = sshbuf_put_u32(b, 0)) != 0) /* uint32 reserved */ + return r; + return 0; } /* parse buffer and return algorithm proposal */ -static char ** -kex_buf2prop(Buffer *raw, int *first_kex_follows) +int +kex_buf2prop(struct sshbuf *raw, int *first_kex_follows, char ***propp) { - Buffer b; + struct sshbuf *b = NULL; + u_char v; u_int i; - char **proposal; + char **proposal = NULL; + int r; - proposal = xcalloc(PROPOSAL_MAX, sizeof(char *)); - - buffer_init(&b); - buffer_append(&b, buffer_ptr(raw), buffer_len(raw)); - /* skip cookie */ - for (i = 0; i < KEX_COOKIE_LEN; i++) - buffer_get_char(&b); + *propp = NULL; + if ((proposal = calloc(PROPOSAL_MAX, sizeof(char *))) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((b = sshbuf_fromb(raw)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_consume(b, KEX_COOKIE_LEN)) != 0) /* skip cookie */ + goto out; /* extract kex init proposal strings */ for (i = 0; i < PROPOSAL_MAX; i++) { - proposal[i] = buffer_get_cstring(&b,NULL); + if ((r = sshbuf_get_cstring(b, &(proposal[i]), NULL)) != 0) + goto out; debug2("kex_parse_kexinit: %s", proposal[i]); } /* first kex follows / reserved */ - i = buffer_get_char(&b); + if ((r = sshbuf_get_u8(b, &v)) != 0 || + (r = sshbuf_get_u32(b, &i)) != 0) + goto out; if (first_kex_follows != NULL) *first_kex_follows = i; - debug2("kex_parse_kexinit: first_kex_follows %d ", i); - i = buffer_get_int(&b); + debug2("kex_parse_kexinit: first_kex_follows %d ", v); debug2("kex_parse_kexinit: reserved %u ", i); - buffer_free(&b); - return proposal; + r = 0; + *propp = proposal; + out: + if (r != 0 && proposal != NULL) + kex_prop_free(proposal); + sshbuf_free(b); + return r; } -static void +void kex_prop_free(char **proposal) { u_int i; + if (proposal == NULL) + return; for (i = 0; i < PROPOSAL_MAX; i++) - xfree(proposal[i]); - xfree(proposal); + free(proposal[i]); + free(proposal); } /* ARGSUSED */ -static void +static int kex_protocol_error(int type, u_int32_t seq, void *ctxt) { error("Hm, kex protocol error: type %d seq %u", type, seq); + return 0; } static void -kex_reset_dispatch(void) +kex_reset_dispatch(struct ssh *ssh) { - dispatch_range(SSH2_MSG_TRANSPORT_MIN, + ssh_dispatch_range(ssh, SSH2_MSG_TRANSPORT_MIN, SSH2_MSG_TRANSPORT_MAX, &kex_protocol_error); - dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); + ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, &kex_input_kexinit); } -void -kex_finish(Kex *kex) +int +kex_send_newkeys(struct ssh *ssh) { - kex_reset_dispatch(); + int r; - packet_start(SSH2_MSG_NEWKEYS); - packet_send(); - /* packet_write_wait(); */ + kex_reset_dispatch(ssh); + if ((r = sshpkt_start(ssh, SSH2_MSG_NEWKEYS)) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; debug("SSH2_MSG_NEWKEYS sent"); - debug("expecting SSH2_MSG_NEWKEYS"); - packet_read_expect(SSH2_MSG_NEWKEYS); - packet_check_eom(); - debug("SSH2_MSG_NEWKEYS received"); - - kex->done = 1; - buffer_clear(&kex->peer); - /* buffer_clear(&kex->my); */ - kex->flags &= ~KEX_INIT_SENT; - xfree(kex->name); - kex->name = NULL; + ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_input_newkeys); + return 0; } -void -kex_send_kexinit(Kex *kex) +static int +kex_input_newkeys(int type, u_int32_t seq, void *ctxt) { - u_int32_t rnd = 0; - u_char *cookie; - u_int i; + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + int r; - if (kex == NULL) { - error("kex_send_kexinit: no kex, cannot rekey"); - return; - } - if (kex->flags & KEX_INIT_SENT) { - debug("KEX_INIT_SENT"); - return; - } + debug("SSH2_MSG_NEWKEYS received"); + ssh_dispatch_set(ssh, SSH2_MSG_NEWKEYS, &kex_protocol_error); + if ((r = sshpkt_get_end(ssh)) != 0) + return r; + kex->done = 1; + sshbuf_reset(kex->peer); + /* sshbuf_reset(kex->my); */ + kex->flags &= ~KEX_INIT_SENT; + free(kex->name); + kex->name = NULL; + return 0; +} + +int +kex_send_kexinit(struct ssh *ssh) +{ + u_char *cookie; + struct kex *kex = ssh->kex; + int r; + + if (kex == NULL) + return SSH_ERR_INTERNAL_ERROR; + if (kex->flags & KEX_INIT_SENT) + return 0; kex->done = 0; /* generate a random cookie */ - if (buffer_len(&kex->my) < KEX_COOKIE_LEN) - fatal("kex_send_kexinit: kex proposal too short"); - cookie = buffer_ptr(&kex->my); - for (i = 0; i < KEX_COOKIE_LEN; i++) { - if (i % 4 == 0) - rnd = arc4random(); - cookie[i] = rnd; - rnd >>= 8; - } - packet_start(SSH2_MSG_KEXINIT); - packet_put_raw(buffer_ptr(&kex->my), buffer_len(&kex->my)); - packet_send(); + if (sshbuf_len(kex->my) < KEX_COOKIE_LEN) + return SSH_ERR_INVALID_FORMAT; + if ((cookie = sshbuf_mutable_ptr(kex->my)) == NULL) + return SSH_ERR_INTERNAL_ERROR; + arc4random_buf(cookie, KEX_COOKIE_LEN); + + if ((r = sshpkt_start(ssh, SSH2_MSG_KEXINIT)) != 0 || + (r = sshpkt_putb(ssh, kex->my)) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; debug("SSH2_MSG_KEXINIT sent"); kex->flags |= KEX_INIT_SENT; + return 0; } /* ARGSUSED */ -void +int kex_input_kexinit(int type, u_int32_t seq, void *ctxt) { - char *ptr; - u_int i, dlen; - Kex *kex = (Kex *)ctxt; + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + const u_char *ptr; + u_int i; + size_t dlen; + int r; debug("SSH2_MSG_KEXINIT received"); if (kex == NULL) - fatal("kex_input_kexinit: no kex, cannot rekey"); + return SSH_ERR_INVALID_ARGUMENT; - ptr = packet_get_raw(&dlen); - buffer_append(&kex->peer, ptr, dlen); + ptr = sshpkt_ptr(ssh, &dlen); + if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0) + return r; /* discard packet */ for (i = 0; i < KEX_COOKIE_LEN; i++) - packet_get_char(); + if ((r = sshpkt_get_u8(ssh, NULL)) != 0) + return r; for (i = 0; i < PROPOSAL_MAX; i++) - xfree(packet_get_string(NULL)); - (void) packet_get_char(); - (void) packet_get_int(); - packet_check_eom(); + if ((r = sshpkt_get_string(ssh, NULL, NULL)) != 0) + return r; + /* + * XXX RFC4253 sec 7: "each side MAY guess" - currently no supported + * KEX method has the server move first, but a server might be using + * a custom method or one that we otherwise don't support. We should + * be prepared to remember first_kex_follows here so we can eat a + * packet later. + * XXX2 - RFC4253 is kind of ambiguous on what first_kex_follows means + * for cases where the server *doesn't* go first. I guess we should + * ignore it when it is set for these cases, which is what we do now. + */ + if ((r = sshpkt_get_u8(ssh, NULL)) != 0 || /* first_kex_follows */ + (r = sshpkt_get_u32(ssh, NULL)) != 0 || /* reserved */ + (r = sshpkt_get_end(ssh)) != 0) + return r; - kex_kexinit_finish(kex); -} - -Kex * -kex_setup(char *proposal[PROPOSAL_MAX]) -{ - Kex *kex; - - kex = xcalloc(1, sizeof(*kex)); - buffer_init(&kex->peer); - buffer_init(&kex->my); - kex_prop2buf(&kex->my, proposal); - kex->done = 0; - - kex_send_kexinit(kex); /* we start */ - kex_reset_dispatch(); - - return kex; -} - -static void -kex_kexinit_finish(Kex *kex) -{ if (!(kex->flags & KEX_INIT_SENT)) - kex_send_kexinit(kex); + if ((r = kex_send_kexinit(ssh)) != 0) + return r; + if ((r = kex_choose_conf(ssh)) != 0) + return r; - kex_choose_conf(kex); + if (kex->kex_type < KEX_MAX && kex->kex[kex->kex_type] != NULL) + return (kex->kex[kex->kex_type])(ssh); - if (kex->kex_type >= 0 && kex->kex_type < KEX_MAX && - kex->kex[kex->kex_type] != NULL) { - (kex->kex[kex->kex_type])(kex); - } else { - fatal("Unsupported key exchange %d", kex->kex_type); - } + return SSH_ERR_INTERNAL_ERROR; } -static void -choose_enc(Enc *enc, char *client, char *server) +int +kex_new(struct ssh *ssh, char *proposal[PROPOSAL_MAX], struct kex **kexp) +{ + struct kex *kex; + int r; + + *kexp = NULL; + if ((kex = calloc(1, sizeof(*kex))) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((kex->peer = sshbuf_new()) == NULL || + (kex->my = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = kex_prop2buf(kex->my, proposal)) != 0) + goto out; + kex->done = 0; + kex_reset_dispatch(ssh); + r = 0; + *kexp = kex; + out: + if (r != 0) + kex_free(kex); + return r; +} + +void +kex_free_newkeys(struct newkeys *newkeys) +{ + if (newkeys == NULL) + return; + if (newkeys->enc.key) { + explicit_bzero(newkeys->enc.key, newkeys->enc.key_len); + free(newkeys->enc.key); + newkeys->enc.key = NULL; + } + if (newkeys->enc.iv) { + explicit_bzero(newkeys->enc.iv, newkeys->enc.block_size); + free(newkeys->enc.iv); + newkeys->enc.iv = NULL; + } + free(newkeys->enc.name); + explicit_bzero(&newkeys->enc, sizeof(newkeys->enc)); + free(newkeys->comp.name); + explicit_bzero(&newkeys->comp, sizeof(newkeys->comp)); + mac_clear(&newkeys->mac); + if (newkeys->mac.key) { + explicit_bzero(newkeys->mac.key, newkeys->mac.key_len); + free(newkeys->mac.key); + newkeys->mac.key = NULL; + } + free(newkeys->mac.name); + explicit_bzero(&newkeys->mac, sizeof(newkeys->mac)); + explicit_bzero(newkeys, sizeof(*newkeys)); + free(newkeys); +} + +void +kex_free(struct kex *kex) +{ + u_int mode; + +#ifdef WITH_OPENSSL + if (kex->dh) + DH_free(kex->dh); +#ifdef OPENSSL_HAS_ECC + if (kex->ec_client_key) + EC_KEY_free(kex->ec_client_key); +#endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + for (mode = 0; mode < MODE_MAX; mode++) { + kex_free_newkeys(kex->newkeys[mode]); + kex->newkeys[mode] = NULL; + } + sshbuf_free(kex->peer); + sshbuf_free(kex->my); + free(kex->session_id); + free(kex->client_version_string); + free(kex->server_version_string); + free(kex->failed_choice); + free(kex); +} + +int +kex_setup(struct ssh *ssh, char *proposal[PROPOSAL_MAX]) +{ + int r; + + if ((r = kex_new(ssh, proposal, &ssh->kex)) != 0) + return r; + if ((r = kex_send_kexinit(ssh)) != 0) { /* we start */ + kex_free(ssh->kex); + ssh->kex = NULL; + return r; + } + return 0; +} + +static int +choose_enc(struct sshenc *enc, char *client, char *server) { char *name = match_list(client, server, NULL); + if (name == NULL) - fatal("no matching cipher found: client %s server %s", - client, server); + return SSH_ERR_NO_CIPHER_ALG_MATCH; if ((enc->cipher = cipher_by_name(name)) == NULL) - fatal("matching cipher is not supported: %s", name); + return SSH_ERR_INTERNAL_ERROR; enc->name = name; enc->enabled = 0; enc->iv = NULL; + enc->iv_len = cipher_ivlen(enc->cipher); enc->key = NULL; enc->key_len = cipher_keylen(enc->cipher); enc->block_size = cipher_blocksize(enc->cipher); + return 0; } -static void -choose_mac(Mac *mac, char *client, char *server) +static int +choose_mac(struct ssh *ssh, struct sshmac *mac, char *client, char *server) { char *name = match_list(client, server, NULL); + if (name == NULL) - fatal("no matching mac found: client %s server %s", - client, server); + return SSH_ERR_NO_MAC_ALG_MATCH; if (mac_setup(mac, name) < 0) - fatal("unsupported mac %s", name); + return SSH_ERR_INTERNAL_ERROR; /* truncate the key */ - if (datafellows & SSH_BUG_HMAC) + if (ssh->compat & SSH_BUG_HMAC) mac->key_len = 16; mac->name = name; mac->key = NULL; mac->enabled = 0; + return 0; } -static void -choose_comp(Comp *comp, char *client, char *server) +static int +choose_comp(struct sshcomp *comp, char *client, char *server) { char *name = match_list(client, server, NULL); + if (name == NULL) - fatal("no matching comp found: client %s server %s", client, server); + return SSH_ERR_NO_COMPRESS_ALG_MATCH; if (strcmp(name, "zlib@openssh.com") == 0) { comp->type = COMP_DELAYED; } else if (strcmp(name, "zlib") == 0) { @@ -329,49 +580,42 @@ choose_comp(Comp *comp, char *client, char *server) } else if (strcmp(name, "none") == 0) { comp->type = COMP_NONE; } else { - fatal("unsupported comp %s", name); + return SSH_ERR_INTERNAL_ERROR; } comp->name = name; + return 0; } -static void -choose_kex(Kex *k, char *client, char *server) +static int +choose_kex(struct kex *k, char *client, char *server) { + const struct kexalg *kexalg; + k->name = match_list(client, server, NULL); + if (k->name == NULL) - fatal("Unable to negotiate a key exchange method"); - if (strcmp(k->name, KEX_DH1) == 0) { - k->kex_type = KEX_DH_GRP1_SHA1; - k->evp_md = EVP_sha1(); - } else if (strcmp(k->name, KEX_DH14) == 0) { - k->kex_type = KEX_DH_GRP14_SHA1; - k->evp_md = EVP_sha1(); - } else if (strcmp(k->name, KEX_DHGEX_SHA1) == 0) { - k->kex_type = KEX_DH_GEX_SHA1; - k->evp_md = EVP_sha1(); -#if OPENSSL_VERSION_NUMBER >= 0x00907000L - } else if (strcmp(k->name, KEX_DHGEX_SHA256) == 0) { - k->kex_type = KEX_DH_GEX_SHA256; - k->evp_md = evp_ssh_sha256(); - } else if (strncmp(k->name, KEX_ECDH_SHA2_STEM, - sizeof(KEX_ECDH_SHA2_STEM) - 1) == 0) { - k->kex_type = KEX_ECDH_SHA2; - k->evp_md = kex_ecdh_name_to_evpmd(k->name); -#endif - } else - fatal("bad kex alg %s", k->name); + return SSH_ERR_NO_KEX_ALG_MATCH; + if ((kexalg = kex_alg_by_name(k->name)) == NULL) + return SSH_ERR_INTERNAL_ERROR; + k->kex_type = kexalg->type; + k->hash_alg = kexalg->hash_alg; + k->ec_nid = kexalg->ec_nid; + return 0; } -static void -choose_hostkeyalg(Kex *k, char *client, char *server) +static int +choose_hostkeyalg(struct kex *k, char *client, char *server) { char *hostkeyalg = match_list(client, server, NULL); + if (hostkeyalg == NULL) - fatal("no hostkey alg"); - k->hostkey_type = key_type_from_name(hostkeyalg); + return SSH_ERR_NO_HOSTKEY_ALG_MATCH; + k->hostkey_type = sshkey_type_from_name(hostkeyalg); if (k->hostkey_type == KEY_UNSPEC) - fatal("bad hostkey alg '%s'", hostkeyalg); - xfree(hostkeyalg); + return SSH_ERR_INTERNAL_ERROR; + k->hostkey_nid = sshkey_ecdsa_nid_from_name(hostkeyalg); + free(hostkeyalg); + return 0; } static int @@ -398,18 +642,20 @@ proposals_match(char *my[PROPOSAL_MAX], char *peer[PROPOSAL_MAX]) return (1); } -static void -kex_choose_conf(Kex *kex) +static int +kex_choose_conf(struct ssh *ssh) { - Newkeys *newkeys; - char **my, **peer; + struct kex *kex = ssh->kex; + struct newkeys *newkeys; + char **my = NULL, **peer = NULL; char **cprop, **sprop; int nenc, nmac, ncomp; - u_int mode, ctos, need; - int first_kex_follows, type; + u_int mode, ctos, need, dh_need, authlen; + int r, first_kex_follows; - my = kex_buf2prop(&kex->my, NULL); - peer = kex_buf2prop(&kex->peer, &first_kex_follows); + if ((r = kex_buf2prop(kex->my, NULL, &my)) != 0 || + (r = kex_buf2prop(kex->peer, &first_kex_follows, &peer)) != 0) + goto out; if (kex->server) { cprop=peer; @@ -421,85 +667,125 @@ kex_choose_conf(Kex *kex) /* Check whether server offers roaming */ if (!kex->server) { - char *roaming; - roaming = match_list(KEX_RESUME, peer[PROPOSAL_KEX_ALGS], NULL); + char *roaming = match_list(KEX_RESUME, + peer[PROPOSAL_KEX_ALGS], NULL); + if (roaming) { kex->roaming = 1; - xfree(roaming); + free(roaming); } } /* Algorithm Negotiation */ for (mode = 0; mode < MODE_MAX; mode++) { - newkeys = xcalloc(1, sizeof(*newkeys)); + if ((newkeys = calloc(1, sizeof(*newkeys))) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } kex->newkeys[mode] = newkeys; ctos = (!kex->server && mode == MODE_OUT) || (kex->server && mode == MODE_IN); nenc = ctos ? PROPOSAL_ENC_ALGS_CTOS : PROPOSAL_ENC_ALGS_STOC; nmac = ctos ? PROPOSAL_MAC_ALGS_CTOS : PROPOSAL_MAC_ALGS_STOC; ncomp = ctos ? PROPOSAL_COMP_ALGS_CTOS : PROPOSAL_COMP_ALGS_STOC; - choose_enc (&newkeys->enc, cprop[nenc], sprop[nenc]); - choose_mac (&newkeys->mac, cprop[nmac], sprop[nmac]); - choose_comp(&newkeys->comp, cprop[ncomp], sprop[ncomp]); + if ((r = choose_enc(&newkeys->enc, cprop[nenc], + sprop[nenc])) != 0) { + kex->failed_choice = peer[nenc]; + peer[nenc] = NULL; + goto out; + } + authlen = cipher_authlen(newkeys->enc.cipher); + /* ignore mac for authenticated encryption */ + if (authlen == 0 && + (r = choose_mac(ssh, &newkeys->mac, cprop[nmac], + sprop[nmac])) != 0) { + kex->failed_choice = peer[nmac]; + peer[nmac] = NULL; + goto out; + } + if ((r = choose_comp(&newkeys->comp, cprop[ncomp], + sprop[ncomp])) != 0) { + kex->failed_choice = peer[ncomp]; + peer[ncomp] = NULL; + goto out; + } debug("kex: %s %s %s %s", ctos ? "client->server" : "server->client", newkeys->enc.name, - newkeys->mac.name, + authlen == 0 ? newkeys->mac.name : "", newkeys->comp.name); } - choose_kex(kex, cprop[PROPOSAL_KEX_ALGS], sprop[PROPOSAL_KEX_ALGS]); - choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS], - sprop[PROPOSAL_SERVER_HOST_KEY_ALGS]); - need = 0; + if ((r = choose_kex(kex, cprop[PROPOSAL_KEX_ALGS], + sprop[PROPOSAL_KEX_ALGS])) != 0) { + kex->failed_choice = peer[PROPOSAL_KEX_ALGS]; + peer[PROPOSAL_KEX_ALGS] = NULL; + goto out; + } + if ((r = choose_hostkeyalg(kex, cprop[PROPOSAL_SERVER_HOST_KEY_ALGS], + sprop[PROPOSAL_SERVER_HOST_KEY_ALGS])) != 0) { + kex->failed_choice = peer[PROPOSAL_SERVER_HOST_KEY_ALGS]; + peer[PROPOSAL_SERVER_HOST_KEY_ALGS] = NULL; + goto out; + } + need = dh_need = 0; for (mode = 0; mode < MODE_MAX; mode++) { newkeys = kex->newkeys[mode]; - if (need < newkeys->enc.key_len) - need = newkeys->enc.key_len; - if (need < newkeys->enc.block_size) - need = newkeys->enc.block_size; - if (need < newkeys->mac.key_len) - need = newkeys->mac.key_len; + need = MAX(need, newkeys->enc.key_len); + need = MAX(need, newkeys->enc.block_size); + need = MAX(need, newkeys->enc.iv_len); + need = MAX(need, newkeys->mac.key_len); + dh_need = MAX(dh_need, cipher_seclen(newkeys->enc.cipher)); + dh_need = MAX(dh_need, newkeys->enc.block_size); + dh_need = MAX(dh_need, newkeys->enc.iv_len); + dh_need = MAX(dh_need, newkeys->mac.key_len); } /* XXX need runden? */ kex->we_need = need; + kex->dh_need = dh_need; /* ignore the next message if the proposals do not match */ if (first_kex_follows && !proposals_match(my, peer) && - !(datafellows & SSH_BUG_FIRSTKEX)) { - type = packet_read(); - debug2("skipping next packet (type %u)", type); - } - + !(ssh->compat & SSH_BUG_FIRSTKEX)) + ssh->dispatch_skip_packets = 1; + r = 0; + out: kex_prop_free(my); kex_prop_free(peer); + return r; } -static u_char * -derive_key(Kex *kex, int id, u_int need, u_char *hash, u_int hashlen, - BIGNUM *shared_secret) +static int +derive_key(struct ssh *ssh, int id, u_int need, u_char *hash, u_int hashlen, + const struct sshbuf *shared_secret, u_char **keyp) { - Buffer b; - EVP_MD_CTX md; + struct kex *kex = ssh->kex; + struct ssh_digest_ctx *hashctx = NULL; char c = id; u_int have; - int mdsz; + size_t mdsz; u_char *digest; + int r; - if ((mdsz = EVP_MD_size(kex->evp_md)) <= 0) - fatal("bad kex md size %d", mdsz); - digest = xmalloc(roundup(need, mdsz)); - - buffer_init(&b); - buffer_put_bignum2(&b, shared_secret); + if ((mdsz = ssh_digest_bytes(kex->hash_alg)) == 0) + return SSH_ERR_INVALID_ARGUMENT; + if ((digest = calloc(1, roundup(need, mdsz))) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } /* K1 = HASH(K || H || "A" || session_id) */ - EVP_DigestInit(&md, kex->evp_md); - if (!(datafellows & SSH_BUG_DERIVEKEY)) - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestUpdate(&md, hash, hashlen); - EVP_DigestUpdate(&md, &c, 1); - EVP_DigestUpdate(&md, kex->session_id, kex->session_id_len); - EVP_DigestFinal(&md, digest, NULL); + if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL || + ssh_digest_update_buffer(hashctx, shared_secret) != 0 || + ssh_digest_update(hashctx, hash, hashlen) != 0 || + ssh_digest_update(hashctx, &c, 1) != 0 || + ssh_digest_update(hashctx, kex->session_id, + kex->session_id_len) != 0 || + ssh_digest_final(hashctx, digest, mdsz) != 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + ssh_digest_free(hashctx); + hashctx = NULL; /* * expand key: @@ -507,104 +793,123 @@ derive_key(Kex *kex, int id, u_int need, u_char *hash, u_int hashlen, * Key = K1 || K2 || ... || Kn */ for (have = mdsz; need > have; have += mdsz) { - EVP_DigestInit(&md, kex->evp_md); - if (!(datafellows & SSH_BUG_DERIVEKEY)) - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestUpdate(&md, hash, hashlen); - EVP_DigestUpdate(&md, digest, have); - EVP_DigestFinal(&md, digest + have, NULL); + if ((hashctx = ssh_digest_start(kex->hash_alg)) == NULL || + ssh_digest_update_buffer(hashctx, shared_secret) != 0 || + ssh_digest_update(hashctx, hash, hashlen) != 0 || + ssh_digest_update(hashctx, digest, have) != 0 || + ssh_digest_final(hashctx, digest + have, mdsz) != 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + ssh_digest_free(hashctx); + hashctx = NULL; } - buffer_free(&b); #ifdef DEBUG_KEX fprintf(stderr, "key '%c'== ", c); dump_digest("key", digest, need); #endif - return digest; + *keyp = digest; + digest = NULL; + r = 0; + out: + if (digest) + free(digest); + ssh_digest_free(hashctx); + return r; } -Newkeys *current_keys[MODE_MAX]; - #define NKEYS 6 -void -kex_derive_keys(Kex *kex, u_char *hash, u_int hashlen, BIGNUM *shared_secret) +int +kex_derive_keys(struct ssh *ssh, u_char *hash, u_int hashlen, + const struct sshbuf *shared_secret) { + struct kex *kex = ssh->kex; u_char *keys[NKEYS]; - u_int i, mode, ctos; + u_int i, j, mode, ctos; + int r; for (i = 0; i < NKEYS; i++) { - keys[i] = derive_key(kex, 'A'+i, kex->we_need, hash, hashlen, - shared_secret); + if ((r = derive_key(ssh, 'A'+i, kex->we_need, hash, hashlen, + shared_secret, &keys[i])) != 0) { + for (j = 0; j < i; j++) + free(keys[j]); + return r; + } } - - debug2("kex_derive_keys"); for (mode = 0; mode < MODE_MAX; mode++) { - current_keys[mode] = kex->newkeys[mode]; - kex->newkeys[mode] = NULL; ctos = (!kex->server && mode == MODE_OUT) || (kex->server && mode == MODE_IN); - current_keys[mode]->enc.iv = keys[ctos ? 0 : 1]; - current_keys[mode]->enc.key = keys[ctos ? 2 : 3]; - current_keys[mode]->mac.key = keys[ctos ? 4 : 5]; + kex->newkeys[mode]->enc.iv = keys[ctos ? 0 : 1]; + kex->newkeys[mode]->enc.key = keys[ctos ? 2 : 3]; + kex->newkeys[mode]->mac.key = keys[ctos ? 4 : 5]; } + return 0; } -Newkeys * -kex_get_newkeys(int mode) +#ifdef WITH_OPENSSL +int +kex_derive_keys_bn(struct ssh *ssh, u_char *hash, u_int hashlen, + const BIGNUM *secret) { - Newkeys *ret; + struct sshbuf *shared_secret; + int r; - ret = current_keys[mode]; - current_keys[mode] = NULL; - return ret; + if ((shared_secret = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_bignum2(shared_secret, secret)) == 0) + r = kex_derive_keys(ssh, hash, hashlen, shared_secret); + sshbuf_free(shared_secret); + return r; } +#endif -void +#ifdef WITH_SSH1 +int derive_ssh1_session_id(BIGNUM *host_modulus, BIGNUM *server_modulus, u_int8_t cookie[8], u_int8_t id[16]) { - const EVP_MD *evp_md = EVP_md5(); - EVP_MD_CTX md; - u_int8_t nbuf[2048], obuf[EVP_MAX_MD_SIZE]; - int len; + u_int8_t hbuf[2048], sbuf[2048], obuf[SSH_DIGEST_MAX_LENGTH]; + struct ssh_digest_ctx *hashctx = NULL; + size_t hlen, slen; + int r; - EVP_DigestInit(&md, evp_md); - - len = BN_num_bytes(host_modulus); - if (len < (512 / 8) || (u_int)len > sizeof(nbuf)) - fatal("%s: bad host modulus (len %d)", __func__, len); - BN_bn2bin(host_modulus, nbuf); - EVP_DigestUpdate(&md, nbuf, len); - - len = BN_num_bytes(server_modulus); - if (len < (512 / 8) || (u_int)len > sizeof(nbuf)) - fatal("%s: bad server modulus (len %d)", __func__, len); - BN_bn2bin(server_modulus, nbuf); - EVP_DigestUpdate(&md, nbuf, len); - - EVP_DigestUpdate(&md, cookie, 8); - - EVP_DigestFinal(&md, obuf, NULL); - memcpy(id, obuf, 16); - - memset(nbuf, 0, sizeof(nbuf)); - memset(obuf, 0, sizeof(obuf)); - memset(&md, 0, sizeof(md)); + hlen = BN_num_bytes(host_modulus); + slen = BN_num_bytes(server_modulus); + if (hlen < (512 / 8) || (u_int)hlen > sizeof(hbuf) || + slen < (512 / 8) || (u_int)slen > sizeof(sbuf)) + return SSH_ERR_KEY_BITS_MISMATCH; + if (BN_bn2bin(host_modulus, hbuf) <= 0 || + BN_bn2bin(server_modulus, sbuf) <= 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((hashctx = ssh_digest_start(SSH_DIGEST_MD5)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (ssh_digest_update(hashctx, hbuf, hlen) != 0 || + ssh_digest_update(hashctx, sbuf, slen) != 0 || + ssh_digest_update(hashctx, cookie, 8) != 0 || + ssh_digest_final(hashctx, obuf, sizeof(obuf)) != 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + memcpy(id, obuf, ssh_digest_bytes(SSH_DIGEST_MD5)); + r = 0; + out: + ssh_digest_free(hashctx); + explicit_bzero(hbuf, sizeof(hbuf)); + explicit_bzero(sbuf, sizeof(sbuf)); + explicit_bzero(obuf, sizeof(obuf)); + return r; } +#endif #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH) void dump_digest(char *msg, u_char *digest, int len) { - int i; - fprintf(stderr, "%s\n", msg); - for (i = 0; i < len; i++) { - fprintf(stderr, "%02x", digest[i]); - if (i%32 == 31) - fprintf(stderr, "\n"); - else if (i%8 == 7) - fprintf(stderr, " "); - } - fprintf(stderr, "\n"); + sshbuf_dump_data(digest, len, stderr); } #endif diff --git a/kex.h b/kex.h index 7373d3c..d71b532 100644 --- a/kex.h +++ b/kex.h @@ -1,4 +1,4 @@ -/* $OpenBSD: kex.h,v 1.52 2010/09/22 05:01:29 djm Exp $ */ +/* $OpenBSD: kex.h,v 1.73 2015/07/30 00:01:34 djm Exp $ */ /* * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. @@ -26,13 +26,28 @@ #ifndef KEX_H #define KEX_H -#include -#include -#include -#ifdef OPENSSL_HAS_ECC -#include +#include "mac.h" +#include "buffer.h" /* XXX for typedef */ +#include "key.h" /* XXX for typedef */ + +#ifdef WITH_LEAKMALLOC +#include "leakmalloc.h" #endif +#ifdef WITH_OPENSSL +# ifdef OPENSSL_HAS_ECC +# include +# else /* OPENSSL_HAS_ECC */ +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +# endif /* OPENSSL_HAS_ECC */ +#else /* WITH_OPENSSL */ +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +#endif /* WITH_OPENSSL */ + #define KEX_COOKIE_LEN 16 #define KEX_DH1 "diffie-hellman-group1-sha1" @@ -40,13 +55,17 @@ #define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1" #define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256" #define KEX_RESUME "resume@appgate.com" -/* The following represents the family of ECDH methods */ -#define KEX_ECDH_SHA2_STEM "ecdh-sha2-" +#define KEX_ECDH_SHA2_NISTP256 "ecdh-sha2-nistp256" +#define KEX_ECDH_SHA2_NISTP384 "ecdh-sha2-nistp384" +#define KEX_ECDH_SHA2_NISTP521 "ecdh-sha2-nistp521" +#define KEX_CURVE25519_SHA256 "curve25519-sha256@libssh.org" #define COMP_NONE 0 #define COMP_ZLIB 1 #define COMP_DELAYED 2 +#define CURVE25519_SIZE 32 + enum kex_init_proposals { PROPOSAL_KEX_ALGS, PROPOSAL_SERVER_HOST_KEY_ALGS, @@ -73,113 +92,139 @@ enum kex_exchange { KEX_DH_GEX_SHA1, KEX_DH_GEX_SHA256, KEX_ECDH_SHA2, + KEX_C25519_SHA256, KEX_MAX }; #define KEX_INIT_SENT 0x0001 -typedef struct Kex Kex; -typedef struct Mac Mac; -typedef struct Comp Comp; -typedef struct Enc Enc; -typedef struct Newkeys Newkeys; - -struct Enc { +struct sshenc { char *name; - Cipher *cipher; + const struct sshcipher *cipher; int enabled; u_int key_len; + u_int iv_len; u_int block_size; u_char *key; u_char *iv; }; -struct Mac { - char *name; - int enabled; - u_int mac_len; - u_char *key; - u_int key_len; - int type; - const EVP_MD *evp_md; - HMAC_CTX evp_ctx; - struct umac_ctx *umac_ctx; -}; -struct Comp { - int type; +struct sshcomp { + u_int type; int enabled; char *name; }; -struct Newkeys { - Enc enc; - Mac mac; - Comp comp; +struct newkeys { + struct sshenc enc; + struct sshmac mac; + struct sshcomp comp; }; -struct Kex { + +struct ssh; + +struct kex { u_char *session_id; - u_int session_id_len; - Newkeys *newkeys[MODE_MAX]; + size_t session_id_len; + struct newkeys *newkeys[MODE_MAX]; u_int we_need; + u_int dh_need; int server; char *name; int hostkey_type; - int kex_type; + int hostkey_nid; + u_int kex_type; int roaming; - Buffer my; - Buffer peer; + struct sshbuf *my; + struct sshbuf *peer; sig_atomic_t done; - int flags; - const EVP_MD *evp_md; + u_int flags; + int hash_alg; + int ec_nid; char *client_version_string; char *server_version_string; - int (*verify_host_key)(Key *); - Key *(*load_host_public_key)(int); - Key *(*load_host_private_key)(int); - int (*host_key_index)(Key *); - void (*kex[KEX_MAX])(Kex *); + char *failed_choice; + int (*verify_host_key)(struct sshkey *, struct ssh *); + struct sshkey *(*load_host_public_key)(int, int, struct ssh *); + struct sshkey *(*load_host_private_key)(int, int, struct ssh *); + int (*host_key_index)(struct sshkey *, int, struct ssh *); + int (*sign)(struct sshkey *, struct sshkey *, + u_char **, size_t *, const u_char *, size_t, u_int); + int (*kex[KEX_MAX])(struct ssh *); + /* kex specific state */ + DH *dh; /* DH */ + u_int min, max, nbits; /* GEX */ + EC_KEY *ec_client_key; /* ECDH */ + const EC_GROUP *ec_group; /* ECDH */ + u_char c25519_client_key[CURVE25519_SIZE]; /* 25519 */ + u_char c25519_client_pubkey[CURVE25519_SIZE]; /* 25519 */ }; int kex_names_valid(const char *); +char *kex_alg_list(char); +char *kex_names_cat(const char *, const char *); +int kex_assemble_names(const char *, char **); -Kex *kex_setup(char *[PROPOSAL_MAX]); -void kex_finish(Kex *); +int kex_new(struct ssh *, char *[PROPOSAL_MAX], struct kex **); +int kex_setup(struct ssh *, char *[PROPOSAL_MAX]); +void kex_free_newkeys(struct newkeys *); +void kex_free(struct kex *); -void kex_send_kexinit(Kex *); -void kex_input_kexinit(int, u_int32_t, void *); -void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *); +int kex_buf2prop(struct sshbuf *, int *, char ***); +int kex_prop2buf(struct sshbuf *, char *proposal[PROPOSAL_MAX]); +void kex_prop_free(char **); -Newkeys *kex_get_newkeys(int); +int kex_send_kexinit(struct ssh *); +int kex_input_kexinit(int, u_int32_t, void *); +int kex_derive_keys(struct ssh *, u_char *, u_int, const struct sshbuf *); +int kex_derive_keys_bn(struct ssh *, u_char *, u_int, const BIGNUM *); +int kex_send_newkeys(struct ssh *); -void kexdh_client(Kex *); -void kexdh_server(Kex *); -void kexgex_client(Kex *); -void kexgex_server(Kex *); -void kexecdh_client(Kex *); -void kexecdh_server(Kex *); +int kexdh_client(struct ssh *); +int kexdh_server(struct ssh *); +int kexgex_client(struct ssh *); +int kexgex_server(struct ssh *); +int kexecdh_client(struct ssh *); +int kexecdh_server(struct ssh *); +int kexc25519_client(struct ssh *); +int kexc25519_server(struct ssh *); -void -kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int, - BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *); -void -kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *, - int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, - BIGNUM *, BIGNUM *, u_char **, u_int *); -#ifdef OPENSSL_HAS_ECC -void -kex_ecdh_hash(const EVP_MD *, const EC_GROUP *, char *, char *, char *, int, - char *, int, u_char *, int, const EC_POINT *, const EC_POINT *, - const BIGNUM *, u_char **, u_int *); -int kex_ecdh_name_to_nid(const char *); -const EVP_MD *kex_ecdh_name_to_evpmd(const char *); -#else -# define kex_ecdh_name_to_nid(x) (-1) -# define kex_ecdh_name_to_evpmd(x) (NULL) -#endif +int kex_dh_hash(const char *, const char *, + const u_char *, size_t, const u_char *, size_t, const u_char *, size_t, + const BIGNUM *, const BIGNUM *, const BIGNUM *, u_char *, size_t *); -void +int kexgex_hash(int, const char *, const char *, + const u_char *, size_t, const u_char *, size_t, const u_char *, size_t, + int, int, int, + const BIGNUM *, const BIGNUM *, const BIGNUM *, + const BIGNUM *, const BIGNUM *, + u_char *, size_t *); + +int kex_ecdh_hash(int, const EC_GROUP *, const char *, const char *, + const u_char *, size_t, const u_char *, size_t, const u_char *, size_t, + const EC_POINT *, const EC_POINT *, const BIGNUM *, u_char *, size_t *); + +int kex_c25519_hash(int, const char *, const char *, const char *, size_t, + const char *, size_t, const u_char *, size_t, const u_char *, const u_char *, + const u_char *, size_t, u_char *, size_t *); + +void kexc25519_keygen(u_char key[CURVE25519_SIZE], u_char pub[CURVE25519_SIZE]) + __attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE))) + __attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE))); +int kexc25519_shared_key(const u_char key[CURVE25519_SIZE], + const u_char pub[CURVE25519_SIZE], struct sshbuf *out) + __attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE))) + __attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE))); + +int derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]); #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH) void dump_digest(char *, u_char *, int); #endif +#if !defined(WITH_OPENSSL) || !defined(OPENSSL_HAS_ECC) +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#endif + #endif diff --git a/kexc25519.c b/kexc25519.c new file mode 100644 index 0000000..8d8cd4a --- /dev/null +++ b/kexc25519.c @@ -0,0 +1,133 @@ +/* $OpenBSD: kexc25519.c,v 1.9 2015/03/26 07:00:04 djm Exp $ */ +/* + * Copyright (c) 2001, 2013 Markus Friedl. All rights reserved. + * Copyright (c) 2010 Damien Miller. All rights reserved. + * Copyright (c) 2013 Aris Adamantiadis. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include + +#include +#include + +#include +#include + +#include "sshbuf.h" +#include "ssh2.h" +#include "sshkey.h" +#include "cipher.h" +#include "kex.h" +#include "log.h" +#include "digest.h" +#include "ssherr.h" + +extern int crypto_scalarmult_curve25519(u_char a[CURVE25519_SIZE], + const u_char b[CURVE25519_SIZE], const u_char c[CURVE25519_SIZE]) + __attribute__((__bounded__(__minbytes__, 1, CURVE25519_SIZE))) + __attribute__((__bounded__(__minbytes__, 2, CURVE25519_SIZE))) + __attribute__((__bounded__(__minbytes__, 3, CURVE25519_SIZE))); + +void +kexc25519_keygen(u_char key[CURVE25519_SIZE], u_char pub[CURVE25519_SIZE]) +{ + static const u_char basepoint[CURVE25519_SIZE] = {9}; + + arc4random_buf(key, CURVE25519_SIZE); + crypto_scalarmult_curve25519(pub, key, basepoint); +} + +int +kexc25519_shared_key(const u_char key[CURVE25519_SIZE], + const u_char pub[CURVE25519_SIZE], struct sshbuf *out) +{ + u_char shared_key[CURVE25519_SIZE]; + int r; + + /* Check for all-zero public key */ + explicit_bzero(shared_key, CURVE25519_SIZE); + if (timingsafe_bcmp(pub, shared_key, CURVE25519_SIZE) == 0) + return SSH_ERR_KEY_INVALID_EC_VALUE; + + crypto_scalarmult_curve25519(shared_key, key, pub); +#ifdef DEBUG_KEXECDH + dump_digest("shared secret", shared_key, CURVE25519_SIZE); +#endif + sshbuf_reset(out); + r = sshbuf_put_bignum2_bytes(out, shared_key, CURVE25519_SIZE); + explicit_bzero(shared_key, CURVE25519_SIZE); + return r; +} + +int +kex_c25519_hash( + int hash_alg, + const char *client_version_string, + const char *server_version_string, + const char *ckexinit, size_t ckexinitlen, + const char *skexinit, size_t skexinitlen, + const u_char *serverhostkeyblob, size_t sbloblen, + const u_char client_dh_pub[CURVE25519_SIZE], + const u_char server_dh_pub[CURVE25519_SIZE], + const u_char *shared_secret, size_t secretlen, + u_char *hash, size_t *hashlen) +{ + struct sshbuf *b; + int r; + + if (*hashlen < ssh_digest_bytes(hash_alg)) + return SSH_ERR_INVALID_ARGUMENT; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_cstring(b, client_version_string)) < 0 || + (r = sshbuf_put_cstring(b, server_version_string)) < 0 || + /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ + (r = sshbuf_put_u32(b, ckexinitlen+1)) < 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) < 0 || + (r = sshbuf_put(b, ckexinit, ckexinitlen)) < 0 || + (r = sshbuf_put_u32(b, skexinitlen+1)) < 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) < 0 || + (r = sshbuf_put(b, skexinit, skexinitlen)) < 0 || + (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) < 0 || + (r = sshbuf_put_string(b, client_dh_pub, CURVE25519_SIZE)) < 0 || + (r = sshbuf_put_string(b, server_dh_pub, CURVE25519_SIZE)) < 0 || + (r = sshbuf_put(b, shared_secret, secretlen)) < 0) { + sshbuf_free(b); + return r; + } +#ifdef DEBUG_KEX + sshbuf_dump(b, stderr); +#endif + if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) { + sshbuf_free(b); + return SSH_ERR_LIBCRYPTO_ERROR; + } + sshbuf_free(b); + *hashlen = ssh_digest_bytes(hash_alg); +#ifdef DEBUG_KEX + dump_digest("hash", hash, *hashlen); +#endif + return 0; +} diff --git a/kexc25519c.c b/kexc25519c.c new file mode 100644 index 0000000..b7ef65d --- /dev/null +++ b/kexc25519c.c @@ -0,0 +1,170 @@ +/* $OpenBSD: kexc25519c.c,v 1.7 2015/01/26 06:10:03 djm Exp $ */ +/* + * Copyright (c) 2001 Markus Friedl. All rights reserved. + * Copyright (c) 2010 Damien Miller. All rights reserved. + * Copyright (c) 2013 Aris Adamantiadis. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include + +#include +#include +#include + +#include "sshkey.h" +#include "cipher.h" +#include "kex.h" +#include "log.h" +#include "packet.h" +#include "ssh2.h" +#include "sshbuf.h" +#include "digest.h" +#include "ssherr.h" + +static int +input_kex_c25519_reply(int type, u_int32_t seq, void *ctxt); + +int +kexc25519_client(struct ssh *ssh) +{ + struct kex *kex = ssh->kex; + int r; + + kexc25519_keygen(kex->c25519_client_key, kex->c25519_client_pubkey); +#ifdef DEBUG_KEXECDH + dump_digest("client private key:", kex->c25519_client_key, + sizeof(kex->c25519_client_key)); +#endif + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_INIT)) != 0 || + (r = sshpkt_put_string(ssh, kex->c25519_client_pubkey, + sizeof(kex->c25519_client_pubkey))) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; + + debug("expecting SSH2_MSG_KEX_ECDH_REPLY"); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_REPLY, &input_kex_c25519_reply); + return 0; +} + +static int +input_kex_c25519_reply(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + struct sshkey *server_host_key = NULL; + struct sshbuf *shared_secret = NULL; + u_char *server_pubkey = NULL; + u_char *server_host_key_blob = NULL, *signature = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t slen, pklen, sbloblen, hashlen; + int r; + + if (kex->verify_host_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + + /* hostkey */ + if ((r = sshpkt_get_string(ssh, &server_host_key_blob, + &sbloblen)) != 0 || + (r = sshkey_from_blob(server_host_key_blob, sbloblen, + &server_host_key)) != 0) + goto out; + if (server_host_key->type != kex->hostkey_type || + (kex->hostkey_type == KEY_ECDSA && + server_host_key->ecdsa_nid != kex->hostkey_nid)) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (kex->verify_host_key(server_host_key, ssh) == -1) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } + + /* Q_S, server public key */ + /* signed H */ + if ((r = sshpkt_get_string(ssh, &server_pubkey, &pklen)) != 0 || + (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; + if (pklen != CURVE25519_SIZE) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } + +#ifdef DEBUG_KEXECDH + dump_digest("server public key:", server_pubkey, CURVE25519_SIZE); +#endif + + if ((shared_secret = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = kexc25519_shared_key(kex->c25519_client_key, server_pubkey, + shared_secret)) < 0) + goto out; + + /* calc and verify H */ + hashlen = sizeof(hash); + if ((r = kex_c25519_hash( + kex->hash_alg, + kex->client_version_string, + kex->server_version_string, + sshbuf_ptr(kex->my), sshbuf_len(kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), + server_host_key_blob, sbloblen, + kex->c25519_client_pubkey, + server_pubkey, + sshbuf_ptr(shared_secret), sshbuf_len(shared_secret), + hash, &hashlen)) < 0) + goto out; + + if ((r = sshkey_verify(server_host_key, signature, slen, hash, hashlen, + ssh->compat)) != 0) + goto out; + + /* save session id */ + if (kex->session_id == NULL) { + kex->session_id_len = hashlen; + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(kex->session_id, hash, kex->session_id_len); + } + + if ((r = kex_derive_keys(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); +out: + explicit_bzero(hash, sizeof(hash)); + explicit_bzero(kex->c25519_client_key, sizeof(kex->c25519_client_key)); + free(server_host_key_blob); + free(server_pubkey); + free(signature); + sshkey_free(server_host_key); + sshbuf_free(shared_secret); + return r; +} diff --git a/kexc25519s.c b/kexc25519s.c new file mode 100644 index 0000000..2402725 --- /dev/null +++ b/kexc25519s.c @@ -0,0 +1,159 @@ +/* $OpenBSD: kexc25519s.c,v 1.9 2015/04/27 00:37:53 dtucker Exp $ */ +/* + * Copyright (c) 2001 Markus Friedl. All rights reserved. + * Copyright (c) 2010 Damien Miller. All rights reserved. + * Copyright (c) 2013 Aris Adamantiadis. All rights reserved. + * + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include +#include +#include +#include + +#include "sshkey.h" +#include "cipher.h" +#include "digest.h" +#include "kex.h" +#include "log.h" +#include "packet.h" +#include "ssh2.h" +#include "sshbuf.h" +#include "ssherr.h" + +static int input_kex_c25519_init(int, u_int32_t, void *); + +int +kexc25519_server(struct ssh *ssh) +{ + debug("expecting SSH2_MSG_KEX_ECDH_INIT"); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_INIT, &input_kex_c25519_init); + return 0; +} + +static int +input_kex_c25519_init(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + struct sshkey *server_host_private, *server_host_public; + struct sshbuf *shared_secret = NULL; + u_char *server_host_key_blob = NULL, *signature = NULL; + u_char server_key[CURVE25519_SIZE]; + u_char *client_pubkey = NULL; + u_char server_pubkey[CURVE25519_SIZE]; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t slen, pklen, sbloblen, hashlen; + int r; + + /* generate private key */ + kexc25519_keygen(server_key, server_pubkey); +#ifdef DEBUG_KEXECDH + dump_digest("server private key:", server_key, sizeof(server_key)); +#endif + if (kex->load_host_public_key == NULL || + kex->load_host_private_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + server_host_public = kex->load_host_public_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + server_host_private = kex->load_host_private_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + if (server_host_public == NULL) { + r = SSH_ERR_NO_HOSTKEY_LOADED; + goto out; + } + + if ((r = sshpkt_get_string(ssh, &client_pubkey, &pklen)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; + if (pklen != CURVE25519_SIZE) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } +#ifdef DEBUG_KEXECDH + dump_digest("client public key:", client_pubkey, CURVE25519_SIZE); +#endif + + if ((shared_secret = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = kexc25519_shared_key(server_key, client_pubkey, + shared_secret)) < 0) + goto out; + + /* calc H */ + if ((r = sshkey_to_blob(server_host_public, &server_host_key_blob, + &sbloblen)) != 0) + goto out; + hashlen = sizeof(hash); + if ((r = kex_c25519_hash( + kex->hash_alg, + kex->client_version_string, + kex->server_version_string, + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), + server_host_key_blob, sbloblen, + client_pubkey, + server_pubkey, + sshbuf_ptr(shared_secret), sshbuf_len(shared_secret), + hash, &hashlen)) < 0) + goto out; + + /* save session id := H */ + if (kex->session_id == NULL) { + kex->session_id_len = hashlen; + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(kex->session_id, hash, kex->session_id_len); + } + + /* sign H */ + if ((r = kex->sign(server_host_private, server_host_public, + &signature, &slen, hash, hashlen, ssh->compat)) < 0) + goto out; + + /* send server hostkey, ECDH pubkey 'Q_S' and signed H */ + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_REPLY)) != 0 || + (r = sshpkt_put_string(ssh, server_host_key_blob, sbloblen)) != 0 || + (r = sshpkt_put_string(ssh, server_pubkey, sizeof(server_pubkey))) != 0 || + (r = sshpkt_put_string(ssh, signature, slen)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; + + if ((r = kex_derive_keys(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); +out: + explicit_bzero(hash, sizeof(hash)); + explicit_bzero(server_key, sizeof(server_key)); + free(server_host_key_blob); + free(signature); + free(client_pubkey); + sshbuf_free(shared_secret); + return r; +} diff --git a/kexdh.c b/kexdh.c index 56e22f5..feea669 100644 --- a/kexdh.c +++ b/kexdh.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexdh.c,v 1.23 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: kexdh.c,v 1.25 2015/01/19 20:16:15 markus Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -25,64 +25,69 @@ #include "includes.h" +#ifdef WITH_OPENSSL + #include #include #include -#include "buffer.h" #include "ssh2.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" #include "kex.h" +#include "ssherr.h" +#include "sshbuf.h" +#include "digest.h" -void +int kex_dh_hash( - char *client_version_string, - char *server_version_string, - char *ckexinit, int ckexinitlen, - char *skexinit, int skexinitlen, - u_char *serverhostkeyblob, int sbloblen, - BIGNUM *client_dh_pub, - BIGNUM *server_dh_pub, - BIGNUM *shared_secret, - u_char **hash, u_int *hashlen) + const char *client_version_string, + const char *server_version_string, + const u_char *ckexinit, size_t ckexinitlen, + const u_char *skexinit, size_t skexinitlen, + const u_char *serverhostkeyblob, size_t sbloblen, + const BIGNUM *client_dh_pub, + const BIGNUM *server_dh_pub, + const BIGNUM *shared_secret, + u_char *hash, size_t *hashlen) { - Buffer b; - static u_char digest[EVP_MAX_MD_SIZE]; - const EVP_MD *evp_md = EVP_sha1(); - EVP_MD_CTX md; - - buffer_init(&b); - buffer_put_cstring(&b, client_version_string); - buffer_put_cstring(&b, server_version_string); - - /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ - buffer_put_int(&b, ckexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, ckexinit, ckexinitlen); - buffer_put_int(&b, skexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, skexinit, skexinitlen); - - buffer_put_string(&b, serverhostkeyblob, sbloblen); - buffer_put_bignum2(&b, client_dh_pub); - buffer_put_bignum2(&b, server_dh_pub); - buffer_put_bignum2(&b, shared_secret); + struct sshbuf *b; + int r; + if (*hashlen < ssh_digest_bytes(SSH_DIGEST_SHA1)) + return SSH_ERR_INVALID_ARGUMENT; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 || + (r = sshbuf_put_cstring(b, server_version_string)) != 0 || + /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ + (r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 || + (r = sshbuf_put_u32(b, skexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, skexinit, skexinitlen)) != 0 || + (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 || + (r = sshbuf_put_bignum2(b, client_dh_pub)) != 0 || + (r = sshbuf_put_bignum2(b, server_dh_pub)) != 0 || + (r = sshbuf_put_bignum2(b, shared_secret)) != 0) { + sshbuf_free(b); + return r; + } #ifdef DEBUG_KEX - buffer_dump(&b); + sshbuf_dump(b, stderr); #endif - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestFinal(&md, digest, NULL); - - buffer_free(&b); - + if (ssh_digest_buffer(SSH_DIGEST_SHA1, b, hash, *hashlen) != 0) { + sshbuf_free(b); + return SSH_ERR_LIBCRYPTO_ERROR; + } + sshbuf_free(b); + *hashlen = ssh_digest_bytes(SSH_DIGEST_SHA1); #ifdef DEBUG_KEX - dump_digest("hash", digest, EVP_MD_size(evp_md)); + dump_digest("hash", hash, *hashlen); #endif - *hash = digest; - *hashlen = EVP_MD_size(evp_md); + return 0; } +#endif /* WITH_OPENSSL */ diff --git a/kexdhc.c b/kexdhc.c index 76ceb5d..af259f1 100644 --- a/kexdhc.c +++ b/kexdhc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexdhc.c,v 1.12 2010/11/10 01:33:07 djm Exp $ */ +/* $OpenBSD: kexdhc.c,v 1.18 2015/01/26 06:10:03 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -25,6 +25,8 @@ #include "includes.h" +#ifdef WITH_OPENSSL + #include #include @@ -34,128 +36,177 @@ #include #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" #include "dh.h" #include "ssh2.h" +#include "dispatch.h" +#include "compat.h" +#include "ssherr.h" +#include "sshbuf.h" -void -kexdh_client(Kex *kex) +static int input_kex_dh(int, u_int32_t, void *); + +int +kexdh_client(struct ssh *ssh) { - BIGNUM *dh_server_pub = NULL, *shared_secret = NULL; - DH *dh; - Key *server_host_key; - u_char *server_host_key_blob = NULL, *signature = NULL; - u_char *kbuf, *hash; - u_int klen, slen, sbloblen, hashlen; - int kout; + struct kex *kex = ssh->kex; + int r; /* generate and send 'e', client DH public key */ switch (kex->kex_type) { case KEX_DH_GRP1_SHA1: - dh = dh_new_group1(); + kex->dh = dh_new_group1(); break; case KEX_DH_GRP14_SHA1: - dh = dh_new_group14(); + kex->dh = dh_new_group14(); break; default: - fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type); + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if (kex->dh == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; } - dh_gen_key(dh, kex->we_need * 8); - packet_start(SSH2_MSG_KEXDH_INIT); - packet_put_bignum2(dh->pub_key); - packet_send(); - debug("sending SSH2_MSG_KEXDH_INIT"); + if ((r = dh_gen_key(kex->dh, kex->we_need * 8)) != 0 || + (r = sshpkt_start(ssh, SSH2_MSG_KEXDH_INIT)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->pub_key)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; #ifdef DEBUG_KEXDH - DHparams_print_fp(stderr, dh); + DHparams_print_fp(stderr, kex->dh); fprintf(stderr, "pub= "); - BN_print_fp(stderr, dh->pub_key); + BN_print_fp(stderr, kex->dh->pub_key); fprintf(stderr, "\n"); #endif - debug("expecting SSH2_MSG_KEXDH_REPLY"); - packet_read_expect(SSH2_MSG_KEXDH_REPLY); + ssh_dispatch_set(ssh, SSH2_MSG_KEXDH_REPLY, &input_kex_dh); + r = 0; + out: + return r; +} +static int +input_kex_dh(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + BIGNUM *dh_server_pub = NULL, *shared_secret = NULL; + struct sshkey *server_host_key = NULL; + u_char *kbuf = NULL, *server_host_key_blob = NULL, *signature = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t klen = 0, slen, sbloblen, hashlen; + int kout, r; + + if (kex->verify_host_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } /* key, cert */ - server_host_key_blob = packet_get_string(&sbloblen); - server_host_key = key_from_blob(server_host_key_blob, sbloblen); - if (server_host_key == NULL) - fatal("cannot decode server_host_key_blob"); - if (server_host_key->type != kex->hostkey_type) - fatal("type mismatch for decoded server_host_key_blob"); - if (kex->verify_host_key == NULL) - fatal("cannot verify server_host_key"); - if (kex->verify_host_key(server_host_key) == -1) - fatal("server_host_key verification failed"); - + if ((r = sshpkt_get_string(ssh, &server_host_key_blob, + &sbloblen)) != 0 || + (r = sshkey_from_blob(server_host_key_blob, sbloblen, + &server_host_key)) != 0) + goto out; + if (server_host_key->type != kex->hostkey_type || + (kex->hostkey_type == KEY_ECDSA && + server_host_key->ecdsa_nid != kex->hostkey_nid)) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (kex->verify_host_key(server_host_key, ssh) == -1) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } /* DH parameter f, server public DH key */ - if ((dh_server_pub = BN_new()) == NULL) - fatal("dh_server_pub == NULL"); - packet_get_bignum2(dh_server_pub); - + if ((dh_server_pub = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + /* signed H */ + if ((r = sshpkt_get_bignum2(ssh, dh_server_pub)) != 0 || + (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXDH fprintf(stderr, "dh_server_pub= "); BN_print_fp(stderr, dh_server_pub); fprintf(stderr, "\n"); debug("bits %d", BN_num_bits(dh_server_pub)); #endif + if (!dh_pub_is_valid(kex->dh, dh_server_pub)) { + sshpkt_disconnect(ssh, "bad server public DH value"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } - /* signed H */ - signature = packet_get_string(&slen); - packet_check_eom(); - - if (!dh_pub_is_valid(dh, dh_server_pub)) - packet_disconnect("bad server public DH value"); - - klen = DH_size(dh); - kbuf = xmalloc(klen); - if ((kout = DH_compute_key(kbuf, dh_server_pub, dh)) < 0) - fatal("DH_compute_key: failed"); + klen = DH_size(kex->dh); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((kout = DH_compute_key(kbuf, dh_server_pub, kex->dh)) < 0 || + BN_bin2bn(kbuf, kout, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } #ifdef DEBUG_KEXDH dump_digest("shared secret", kbuf, kout); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("kexdh_client: BN_new failed"); - if (BN_bin2bn(kbuf, kout, shared_secret) == NULL) - fatal("kexdh_client: BN_bin2bn failed"); - memset(kbuf, 0, klen); - xfree(kbuf); /* calc and verify H */ - kex_dh_hash( + hashlen = sizeof(hash); + if ((r = kex_dh_hash( kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->my), buffer_len(&kex->my), - buffer_ptr(&kex->peer), buffer_len(&kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), server_host_key_blob, sbloblen, - dh->pub_key, + kex->dh->pub_key, dh_server_pub, shared_secret, - &hash, &hashlen - ); - xfree(server_host_key_blob); - BN_clear_free(dh_server_pub); - DH_free(dh); + hash, &hashlen)) != 0) + goto out; - if (key_verify(server_host_key, signature, slen, hash, hashlen) != 1) - fatal("key_verify failed for server_host_key"); - key_free(server_host_key); - xfree(signature); + if ((r = sshkey_verify(server_host_key, signature, slen, hash, hashlen, + ssh->compat)) != 0) + goto out; /* save session id */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + explicit_bzero(hash, sizeof(hash)); + DH_free(kex->dh); + kex->dh = NULL; + if (dh_server_pub) + BN_clear_free(dh_server_pub); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + sshkey_free(server_host_key); + free(server_host_key_blob); + free(signature); + return r; } +#endif /* WITH_OPENSSL */ diff --git a/kexdhs.c b/kexdhs.c index 9d7e2c1..f510aba 100644 --- a/kexdhs.c +++ b/kexdhs.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexdhs.c,v 1.12 2010/11/10 01:33:07 djm Exp $ */ +/* $OpenBSD: kexdhs.c,v 1.22 2015/01/26 06:10:03 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -34,6 +34,8 @@ #undef KRB5 #endif +#ifdef WITH_OPENSSL + #include #include @@ -42,62 +44,89 @@ #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" #include "dh.h" #include "ssh2.h" -#ifdef GSSAPI -#include "ssh-gss.h" -#endif -#include "monitor_wrap.h" -void -kexdh_server(Kex *kex) +#include "dispatch.h" +#include "compat.h" +#include "ssherr.h" +#include "sshbuf.h" + +static int input_kex_dh_init(int, u_int32_t, void *); + +int +kexdh_server(struct ssh *ssh) { - BIGNUM *shared_secret = NULL, *dh_client_pub = NULL; - DH *dh; - Key *server_host_public, *server_host_private; - u_char *kbuf, *hash, *signature = NULL, *server_host_key_blob = NULL; - u_int sbloblen, klen, hashlen, slen; - int kout; + struct kex *kex = ssh->kex; + int r; /* generate server DH public key */ switch (kex->kex_type) { case KEX_DH_GRP1_SHA1: - dh = dh_new_group1(); + kex->dh = dh_new_group1(); break; case KEX_DH_GRP14_SHA1: - dh = dh_new_group14(); + kex->dh = dh_new_group14(); break; default: - fatal("%s: Unexpected KEX type %d", __func__, kex->kex_type); + r = SSH_ERR_INVALID_ARGUMENT; + goto out; } - dh_gen_key(dh, kex->we_need * 8); + if (kex->dh == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = dh_gen_key(kex->dh, kex->we_need * 8)) != 0) + goto out; debug("expecting SSH2_MSG_KEXDH_INIT"); - packet_read_expect(SSH2_MSG_KEXDH_INIT); + ssh_dispatch_set(ssh, SSH2_MSG_KEXDH_INIT, &input_kex_dh_init); + r = 0; + out: + return r; +} + +int +input_kex_dh_init(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + BIGNUM *shared_secret = NULL, *dh_client_pub = NULL; + struct sshkey *server_host_public, *server_host_private; + u_char *kbuf = NULL, *signature = NULL, *server_host_key_blob = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t sbloblen, slen; + size_t klen = 0, hashlen; + int kout, r; if (kex->load_host_public_key == NULL || - kex->load_host_private_key == NULL) - fatal("Cannot load hostkey"); - server_host_public = kex->load_host_public_key(kex->hostkey_type); - if (server_host_public == NULL) - fatal("Unsupported hostkey type %d", kex->hostkey_type); - server_host_private = kex->load_host_private_key(kex->hostkey_type); - if (server_host_private == NULL) - fatal("Missing private key for hostkey type %d", - kex->hostkey_type); + kex->load_host_private_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + server_host_public = kex->load_host_public_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + server_host_private = kex->load_host_private_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + if (server_host_public == NULL) { + r = SSH_ERR_NO_HOSTKEY_LOADED; + goto out; + } /* key, cert */ - if ((dh_client_pub = BN_new()) == NULL) - fatal("dh_client_pub == NULL"); - packet_get_bignum2(dh_client_pub); - packet_check_eom(); + if ((dh_client_pub = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshpkt_get_bignum2(ssh, dh_client_pub)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXDH fprintf(stderr, "dh_client_pub= "); @@ -107,71 +136,90 @@ kexdh_server(Kex *kex) #endif #ifdef DEBUG_KEXDH - DHparams_print_fp(stderr, dh); + DHparams_print_fp(stderr, kex->dh); fprintf(stderr, "pub= "); - BN_print_fp(stderr, dh->pub_key); + BN_print_fp(stderr, kex->dh->pub_key); fprintf(stderr, "\n"); #endif - if (!dh_pub_is_valid(dh, dh_client_pub)) - packet_disconnect("bad client public DH value"); + if (!dh_pub_is_valid(kex->dh, dh_client_pub)) { + sshpkt_disconnect(ssh, "bad client public DH value"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } - klen = DH_size(dh); - kbuf = xmalloc(klen); - if ((kout = DH_compute_key(kbuf, dh_client_pub, dh)) < 0) - fatal("DH_compute_key: failed"); + klen = DH_size(kex->dh); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((kout = DH_compute_key(kbuf, dh_client_pub, kex->dh)) < 0 || + BN_bin2bn(kbuf, kout, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } #ifdef DEBUG_KEXDH dump_digest("shared secret", kbuf, kout); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("kexdh_server: BN_new failed"); - if (BN_bin2bn(kbuf, kout, shared_secret) == NULL) - fatal("kexdh_server: BN_bin2bn failed"); - memset(kbuf, 0, klen); - xfree(kbuf); - - key_to_blob(server_host_public, &server_host_key_blob, &sbloblen); - + if ((r = sshkey_to_blob(server_host_public, &server_host_key_blob, + &sbloblen)) != 0) + goto out; /* calc H */ - kex_dh_hash( + hashlen = sizeof(hash); + if ((r = kex_dh_hash( kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->peer), buffer_len(&kex->peer), - buffer_ptr(&kex->my), buffer_len(&kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), server_host_key_blob, sbloblen, dh_client_pub, - dh->pub_key, + kex->dh->pub_key, shared_secret, - &hash, &hashlen - ); - BN_clear_free(dh_client_pub); + hash, &hashlen)) != 0) + goto out; /* save session id := H */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } /* sign H */ - if (PRIVSEP(key_sign(server_host_private, &signature, &slen, hash, - hashlen)) < 0) - fatal("kexdh_server: key_sign failed"); + if ((r = kex->sign(server_host_private, server_host_public, + &signature, &slen, hash, hashlen, ssh->compat)) < 0) + goto out; /* destroy_sensitive_data(); */ /* send server hostkey, DH pubkey 'f' and singed H */ - packet_start(SSH2_MSG_KEXDH_REPLY); - packet_put_string(server_host_key_blob, sbloblen); - packet_put_bignum2(dh->pub_key); /* f */ - packet_put_string(signature, slen); - packet_send(); + if ((r = sshpkt_start(ssh, SSH2_MSG_KEXDH_REPLY)) != 0 || + (r = sshpkt_put_string(ssh, server_host_key_blob, sbloblen)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->pub_key)) != 0 || /* f */ + (r = sshpkt_put_string(ssh, signature, slen)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; - xfree(signature); - xfree(server_host_key_blob); - /* have keys, free DH */ - DH_free(dh); - - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + explicit_bzero(hash, sizeof(hash)); + DH_free(kex->dh); + kex->dh = NULL; + if (dh_client_pub) + BN_clear_free(dh_client_pub); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + free(server_host_key_blob); + free(signature); + return r; } +#endif /* WITH_OPENSSL */ diff --git a/kexecdh.c b/kexecdh.c index f13f69d..2a4fec6 100644 --- a/kexecdh.c +++ b/kexecdh.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexecdh.c,v 1.3 2010/09/22 05:01:29 djm Exp $ */ +/* $OpenBSD: kexecdh.c,v 1.6 2015/01/19 20:16:15 markus Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2010 Damien Miller. All rights reserved. @@ -26,7 +26,7 @@ #include "includes.h" -#ifdef OPENSSL_HAS_ECC +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) #include @@ -38,80 +38,63 @@ #include #include -#include "buffer.h" #include "ssh2.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" #include "kex.h" -#include "log.h" +#include "sshbuf.h" +#include "digest.h" +#include "ssherr.h" int -kex_ecdh_name_to_nid(const char *kexname) -{ - if (strlen(kexname) < sizeof(KEX_ECDH_SHA2_STEM) - 1) - fatal("%s: kexname too short \"%s\"", __func__, kexname); - return key_curve_name_to_nid(kexname + sizeof(KEX_ECDH_SHA2_STEM) - 1); -} - -const EVP_MD * -kex_ecdh_name_to_evpmd(const char *kexname) -{ - int nid = kex_ecdh_name_to_nid(kexname); - - if (nid == -1) - fatal("%s: unsupported ECDH curve \"%s\"", __func__, kexname); - return key_ec_nid_to_evpmd(nid); -} - -void kex_ecdh_hash( - const EVP_MD *evp_md, + int hash_alg, const EC_GROUP *ec_group, - char *client_version_string, - char *server_version_string, - char *ckexinit, int ckexinitlen, - char *skexinit, int skexinitlen, - u_char *serverhostkeyblob, int sbloblen, + const char *client_version_string, + const char *server_version_string, + const u_char *ckexinit, size_t ckexinitlen, + const u_char *skexinit, size_t skexinitlen, + const u_char *serverhostkeyblob, size_t sbloblen, const EC_POINT *client_dh_pub, const EC_POINT *server_dh_pub, const BIGNUM *shared_secret, - u_char **hash, u_int *hashlen) + u_char *hash, size_t *hashlen) { - Buffer b; - EVP_MD_CTX md; - static u_char digest[EVP_MAX_MD_SIZE]; - - buffer_init(&b); - buffer_put_cstring(&b, client_version_string); - buffer_put_cstring(&b, server_version_string); - - /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ - buffer_put_int(&b, ckexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, ckexinit, ckexinitlen); - buffer_put_int(&b, skexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, skexinit, skexinitlen); - - buffer_put_string(&b, serverhostkeyblob, sbloblen); - buffer_put_ecpoint(&b, ec_group, client_dh_pub); - buffer_put_ecpoint(&b, ec_group, server_dh_pub); - buffer_put_bignum2(&b, shared_secret); + struct sshbuf *b; + int r; + if (*hashlen < ssh_digest_bytes(hash_alg)) + return SSH_ERR_INVALID_ARGUMENT; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 || + (r = sshbuf_put_cstring(b, server_version_string)) != 0 || + /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ + (r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 || + (r = sshbuf_put_u32(b, skexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, skexinit, skexinitlen)) != 0 || + (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 || + (r = sshbuf_put_ec(b, client_dh_pub, ec_group)) != 0 || + (r = sshbuf_put_ec(b, server_dh_pub, ec_group)) != 0 || + (r = sshbuf_put_bignum2(b, shared_secret)) != 0) { + sshbuf_free(b); + return r; + } #ifdef DEBUG_KEX - buffer_dump(&b); + sshbuf_dump(b, stderr); #endif - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestFinal(&md, digest, NULL); - - buffer_free(&b); - + if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) { + sshbuf_free(b); + return SSH_ERR_LIBCRYPTO_ERROR; + } + sshbuf_free(b); + *hashlen = ssh_digest_bytes(hash_alg); #ifdef DEBUG_KEX - dump_digest("hash", digest, EVP_MD_size(evp_md)); + dump_digest("hash", hash, *hashlen); #endif - *hash = digest; - *hashlen = EVP_MD_size(evp_md); + return 0; } - -#endif /* OPENSSL_HAS_ECC */ +#endif /* defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) */ diff --git a/kexecdhc.c b/kexecdhc.c index 115d4bf..90220ce 100644 --- a/kexecdhc.c +++ b/kexecdhc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexecdhc.c,v 1.2 2010/09/22 05:01:29 djm Exp $ */ +/* $OpenBSD: kexecdhc.c,v 1.10 2015/01/26 06:10:03 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2010 Damien Miller. All rights reserved. @@ -26,143 +26,203 @@ #include "includes.h" +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) + #include #include #include #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include + +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" #include "dh.h" #include "ssh2.h" +#include "dispatch.h" +#include "compat.h" +#include "ssherr.h" +#include "sshbuf.h" -#ifdef OPENSSL_HAS_ECC +static int input_kex_ecdh_reply(int, u_int32_t, void *); -#include - -void -kexecdh_client(Kex *kex) +int +kexecdh_client(struct ssh *ssh) { - EC_KEY *client_key; - EC_POINT *server_public; + struct kex *kex = ssh->kex; + EC_KEY *client_key = NULL; const EC_GROUP *group; - BIGNUM *shared_secret; - Key *server_host_key; - u_char *server_host_key_blob = NULL, *signature = NULL; - u_char *kbuf, *hash; - u_int klen, slen, sbloblen, hashlen; - int curve_nid; + const EC_POINT *public_key; + int r; - if ((curve_nid = kex_ecdh_name_to_nid(kex->name)) == -1) - fatal("%s: unsupported ECDH curve \"%s\"", __func__, kex->name); - if ((client_key = EC_KEY_new_by_curve_name(curve_nid)) == NULL) - fatal("%s: EC_KEY_new_by_curve_name failed", __func__); - if (EC_KEY_generate_key(client_key) != 1) - fatal("%s: EC_KEY_generate_key failed", __func__); + if ((client_key = EC_KEY_new_by_curve_name(kex->ec_nid)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (EC_KEY_generate_key(client_key) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } group = EC_KEY_get0_group(client_key); + public_key = EC_KEY_get0_public_key(client_key); - packet_start(SSH2_MSG_KEX_ECDH_INIT); - packet_put_ecpoint(group, EC_KEY_get0_public_key(client_key)); - packet_send(); + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_INIT)) != 0 || + (r = sshpkt_put_ec(ssh, public_key, group)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; debug("sending SSH2_MSG_KEX_ECDH_INIT"); #ifdef DEBUG_KEXECDH fputs("client private key:\n", stderr); - key_dump_ec_key(client_key); + sshkey_dump_ec_key(client_key); #endif + kex->ec_client_key = client_key; + kex->ec_group = group; + client_key = NULL; /* owned by the kex */ debug("expecting SSH2_MSG_KEX_ECDH_REPLY"); - packet_read_expect(SSH2_MSG_KEX_ECDH_REPLY); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_REPLY, &input_kex_ecdh_reply); + r = 0; + out: + if (client_key) + EC_KEY_free(client_key); + return r; +} + +static int +input_kex_ecdh_reply(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + const EC_GROUP *group; + EC_POINT *server_public = NULL; + EC_KEY *client_key; + BIGNUM *shared_secret = NULL; + struct sshkey *server_host_key = NULL; + u_char *server_host_key_blob = NULL, *signature = NULL; + u_char *kbuf = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t slen, sbloblen; + size_t klen = 0, hashlen; + int r; + + if (kex->verify_host_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + group = kex->ec_group; + client_key = kex->ec_client_key; /* hostkey */ - server_host_key_blob = packet_get_string(&sbloblen); - server_host_key = key_from_blob(server_host_key_blob, sbloblen); - if (server_host_key == NULL) - fatal("cannot decode server_host_key_blob"); - if (server_host_key->type != kex->hostkey_type) - fatal("type mismatch for decoded server_host_key_blob"); - if (kex->verify_host_key == NULL) - fatal("cannot verify server_host_key"); - if (kex->verify_host_key(server_host_key) == -1) - fatal("server_host_key verification failed"); + if ((r = sshpkt_get_string(ssh, &server_host_key_blob, + &sbloblen)) != 0 || + (r = sshkey_from_blob(server_host_key_blob, sbloblen, + &server_host_key)) != 0) + goto out; + if (server_host_key->type != kex->hostkey_type || + (kex->hostkey_type == KEY_ECDSA && + server_host_key->ecdsa_nid != kex->hostkey_nid)) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (kex->verify_host_key(server_host_key, ssh) == -1) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } /* Q_S, server public key */ - if ((server_public = EC_POINT_new(group)) == NULL) - fatal("%s: EC_POINT_new failed", __func__); - packet_get_ecpoint(group, server_public); - - if (key_ec_validate_public(group, server_public) != 0) - fatal("%s: invalid server public key", __func__); + /* signed H */ + if ((server_public = EC_POINT_new(group)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshpkt_get_ec(ssh, server_public, group)) != 0 || + (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXECDH fputs("server public key:\n", stderr); - key_dump_ec_point(group, server_public); + sshkey_dump_ec_point(group, server_public); #endif - - /* signed H */ - signature = packet_get_string(&slen); - packet_check_eom(); + if (sshkey_ec_validate_public(group, server_public) != 0) { + sshpkt_disconnect(ssh, "invalid server public key"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } klen = (EC_GROUP_get_degree(group) + 7) / 8; - kbuf = xmalloc(klen); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } if (ECDH_compute_key(kbuf, klen, server_public, - client_key, NULL) != (int)klen) - fatal("%s: ECDH_compute_key failed", __func__); + client_key, NULL) != (int)klen || + BN_bin2bn(kbuf, klen, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } #ifdef DEBUG_KEXECDH dump_digest("shared secret", kbuf, klen); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - if (BN_bin2bn(kbuf, klen, shared_secret) == NULL) - fatal("%s: BN_bin2bn failed", __func__); - memset(kbuf, 0, klen); - xfree(kbuf); - /* calc and verify H */ - kex_ecdh_hash( - kex->evp_md, + hashlen = sizeof(hash); + if ((r = kex_ecdh_hash( + kex->hash_alg, group, kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->my), buffer_len(&kex->my), - buffer_ptr(&kex->peer), buffer_len(&kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), server_host_key_blob, sbloblen, EC_KEY_get0_public_key(client_key), server_public, shared_secret, - &hash, &hashlen - ); - xfree(server_host_key_blob); - EC_POINT_clear_free(server_public); - EC_KEY_free(client_key); + hash, &hashlen)) != 0) + goto out; - if (key_verify(server_host_key, signature, slen, hash, hashlen) != 1) - fatal("key_verify failed for server_host_key"); - key_free(server_host_key); - xfree(signature); + if ((r = sshkey_verify(server_host_key, signature, slen, hash, + hashlen, ssh->compat)) != 0) + goto out; /* save session id */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + explicit_bzero(hash, sizeof(hash)); + if (kex->ec_client_key) { + EC_KEY_free(kex->ec_client_key); + kex->ec_client_key = NULL; + } + if (server_public) + EC_POINT_clear_free(server_public); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + sshkey_free(server_host_key); + free(server_host_key_blob); + free(signature); + return r; } -#else /* OPENSSL_HAS_ECC */ -void -kexecdh_client(Kex *kex) -{ - fatal("ECC support is not enabled"); -} -#endif /* OPENSSL_HAS_ECC */ +#endif /* defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) */ + diff --git a/kexecdhs.c b/kexecdhs.c index 8c515df..0adb80e 100644 --- a/kexecdhs.c +++ b/kexecdhs.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexecdhs.c,v 1.2 2010/09/22 05:01:29 djm Exp $ */ +/* $OpenBSD: kexecdhs.c,v 1.14 2015/01/26 06:10:03 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2010 Damien Miller. All rights reserved. @@ -26,148 +26,183 @@ #include "includes.h" +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) + #include #include #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include + +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" -#include "dh.h" #include "ssh2.h" -#ifdef GSSAPI -#include "ssh-gss.h" -#endif -#include "monitor_wrap.h" -#ifdef OPENSSL_HAS_ECC +#include "dispatch.h" +#include "compat.h" +#include "ssherr.h" +#include "sshbuf.h" -#include +static int input_kex_ecdh_init(int, u_int32_t, void *); -void -kexecdh_server(Kex *kex) +int +kexecdh_server(struct ssh *ssh) { - EC_POINT *client_public; - EC_KEY *server_key; - const EC_GROUP *group; - BIGNUM *shared_secret; - Key *server_host_private, *server_host_public; - u_char *server_host_key_blob = NULL, *signature = NULL; - u_char *kbuf, *hash; - u_int klen, slen, sbloblen, hashlen; - int curve_nid; + debug("expecting SSH2_MSG_KEX_ECDH_INIT"); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_ECDH_INIT, &input_kex_ecdh_init); + return 0; +} - if ((curve_nid = kex_ecdh_name_to_nid(kex->name)) == -1) - fatal("%s: unsupported ECDH curve \"%s\"", __func__, kex->name); - if ((server_key = EC_KEY_new_by_curve_name(curve_nid)) == NULL) - fatal("%s: EC_KEY_new_by_curve_name failed", __func__); - if (EC_KEY_generate_key(server_key) != 1) - fatal("%s: EC_KEY_generate_key failed", __func__); +static int +input_kex_ecdh_init(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + EC_POINT *client_public; + EC_KEY *server_key = NULL; + const EC_GROUP *group; + const EC_POINT *public_key; + BIGNUM *shared_secret = NULL; + struct sshkey *server_host_private, *server_host_public; + u_char *server_host_key_blob = NULL, *signature = NULL; + u_char *kbuf = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t slen, sbloblen; + size_t klen = 0, hashlen; + int r; + + if ((server_key = EC_KEY_new_by_curve_name(kex->ec_nid)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (EC_KEY_generate_key(server_key) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } group = EC_KEY_get0_group(server_key); #ifdef DEBUG_KEXECDH fputs("server private key:\n", stderr); - key_dump_ec_key(server_key); + sshkey_dump_ec_key(server_key); #endif if (kex->load_host_public_key == NULL || - kex->load_host_private_key == NULL) - fatal("Cannot load hostkey"); - server_host_public = kex->load_host_public_key(kex->hostkey_type); - if (server_host_public == NULL) - fatal("Unsupported hostkey type %d", kex->hostkey_type); - server_host_private = kex->load_host_private_key(kex->hostkey_type); - if (server_host_private == NULL) - fatal("Missing private key for hostkey type %d", - kex->hostkey_type); - - debug("expecting SSH2_MSG_KEX_ECDH_INIT"); - packet_read_expect(SSH2_MSG_KEX_ECDH_INIT); - if ((client_public = EC_POINT_new(group)) == NULL) - fatal("%s: EC_POINT_new failed", __func__); - packet_get_ecpoint(group, client_public); - packet_check_eom(); - - if (key_ec_validate_public(group, client_public) != 0) - fatal("%s: invalid client public key", __func__); + kex->load_host_private_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + server_host_public = kex->load_host_public_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + server_host_private = kex->load_host_private_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + if (server_host_public == NULL) { + r = SSH_ERR_NO_HOSTKEY_LOADED; + goto out; + } + if ((client_public = EC_POINT_new(group)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshpkt_get_ec(ssh, client_public, group)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXECDH fputs("client public key:\n", stderr); - key_dump_ec_point(group, client_public); + sshkey_dump_ec_point(group, client_public); #endif + if (sshkey_ec_validate_public(group, client_public) != 0) { + sshpkt_disconnect(ssh, "invalid client public key"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } /* Calculate shared_secret */ klen = (EC_GROUP_get_degree(group) + 7) / 8; - kbuf = xmalloc(klen); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } if (ECDH_compute_key(kbuf, klen, client_public, - server_key, NULL) != (int)klen) - fatal("%s: ECDH_compute_key failed", __func__); + server_key, NULL) != (int)klen || + BN_bin2bn(kbuf, klen, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } -#ifdef DEBUG_KEXDH +#ifdef DEBUG_KEXECDH dump_digest("shared secret", kbuf, klen); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - if (BN_bin2bn(kbuf, klen, shared_secret) == NULL) - fatal("%s: BN_bin2bn failed", __func__); - memset(kbuf, 0, klen); - xfree(kbuf); - /* calc H */ - key_to_blob(server_host_public, &server_host_key_blob, &sbloblen); - kex_ecdh_hash( - kex->evp_md, + if ((r = sshkey_to_blob(server_host_public, &server_host_key_blob, + &sbloblen)) != 0) + goto out; + hashlen = sizeof(hash); + if ((r = kex_ecdh_hash( + kex->hash_alg, group, kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->peer), buffer_len(&kex->peer), - buffer_ptr(&kex->my), buffer_len(&kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), server_host_key_blob, sbloblen, client_public, EC_KEY_get0_public_key(server_key), shared_secret, - &hash, &hashlen - ); - EC_POINT_clear_free(client_public); + hash, &hashlen)) != 0) + goto out; /* save session id := H */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } /* sign H */ - if (PRIVSEP(key_sign(server_host_private, &signature, &slen, - hash, hashlen)) < 0) - fatal("kexdh_server: key_sign failed"); + if ((r = kex->sign(server_host_private, server_host_public, + &signature, &slen, hash, hashlen, ssh->compat)) < 0) + goto out; /* destroy_sensitive_data(); */ + public_key = EC_KEY_get0_public_key(server_key); /* send server hostkey, ECDH pubkey 'Q_S' and signed H */ - packet_start(SSH2_MSG_KEX_ECDH_REPLY); - packet_put_string(server_host_key_blob, sbloblen); - packet_put_ecpoint(group, EC_KEY_get0_public_key(server_key)); - packet_put_string(signature, slen); - packet_send(); + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_ECDH_REPLY)) != 0 || + (r = sshpkt_put_string(ssh, server_host_key_blob, sbloblen)) != 0 || + (r = sshpkt_put_ec(ssh, public_key, group)) != 0 || + (r = sshpkt_put_string(ssh, signature, slen)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; - xfree(signature); - xfree(server_host_key_blob); - /* have keys, free server key */ - EC_KEY_free(server_key); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + explicit_bzero(hash, sizeof(hash)); + if (kex->ec_client_key) { + EC_KEY_free(kex->ec_client_key); + kex->ec_client_key = NULL; + } + if (server_key) + EC_KEY_free(server_key); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + free(server_host_key_blob); + free(signature); + return r; +} +#endif /* defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) */ - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); -} -#else /* OPENSSL_HAS_ECC */ -void -kexecdh_server(Kex *kex) -{ - fatal("ECC support is not enabled"); -} -#endif /* OPENSSL_HAS_ECC */ diff --git a/kexgex.c b/kexgex.c index aeae7c0..63be885 100644 --- a/kexgex.c +++ b/kexgex.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexgex.c,v 1.27 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: kexgex.c,v 1.29 2015/01/19 20:16:15 markus Exp $ */ /* * Copyright (c) 2000 Niels Provos. All rights reserved. * Copyright (c) 2001 Markus Friedl. All rights reserved. @@ -35,73 +35,77 @@ #undef KRB5 #endif +#ifdef WITH_OPENSSL + #include #include #include -#include "buffer.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" #include "kex.h" #include "ssh2.h" +#include "ssherr.h" +#include "sshbuf.h" +#include "digest.h" -void +int kexgex_hash( - const EVP_MD *evp_md, - char *client_version_string, - char *server_version_string, - char *ckexinit, int ckexinitlen, - char *skexinit, int skexinitlen, - u_char *serverhostkeyblob, int sbloblen, - int min, int wantbits, int max, BIGNUM *prime, BIGNUM *gen, - BIGNUM *client_dh_pub, - BIGNUM *server_dh_pub, - BIGNUM *shared_secret, - u_char **hash, u_int *hashlen) + int hash_alg, + const char *client_version_string, + const char *server_version_string, + const u_char *ckexinit, size_t ckexinitlen, + const u_char *skexinit, size_t skexinitlen, + const u_char *serverhostkeyblob, size_t sbloblen, + int min, int wantbits, int max, + const BIGNUM *prime, + const BIGNUM *gen, + const BIGNUM *client_dh_pub, + const BIGNUM *server_dh_pub, + const BIGNUM *shared_secret, + u_char *hash, size_t *hashlen) { - Buffer b; - static u_char digest[EVP_MAX_MD_SIZE]; - EVP_MD_CTX md; + struct sshbuf *b; + int r; - buffer_init(&b); - buffer_put_cstring(&b, client_version_string); - buffer_put_cstring(&b, server_version_string); - - /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ - buffer_put_int(&b, ckexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, ckexinit, ckexinitlen); - buffer_put_int(&b, skexinitlen+1); - buffer_put_char(&b, SSH2_MSG_KEXINIT); - buffer_append(&b, skexinit, skexinitlen); - - buffer_put_string(&b, serverhostkeyblob, sbloblen); - if (min == -1 || max == -1) - buffer_put_int(&b, wantbits); - else { - buffer_put_int(&b, min); - buffer_put_int(&b, wantbits); - buffer_put_int(&b, max); + if (*hashlen < ssh_digest_bytes(SSH_DIGEST_SHA1)) + return SSH_ERR_INVALID_ARGUMENT; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_put_cstring(b, client_version_string)) != 0 || + (r = sshbuf_put_cstring(b, server_version_string)) != 0 || + /* kexinit messages: fake header: len+SSH2_MSG_KEXINIT */ + (r = sshbuf_put_u32(b, ckexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, ckexinit, ckexinitlen)) != 0 || + (r = sshbuf_put_u32(b, skexinitlen+1)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_KEXINIT)) != 0 || + (r = sshbuf_put(b, skexinit, skexinitlen)) != 0 || + (r = sshbuf_put_string(b, serverhostkeyblob, sbloblen)) != 0 || + (min != -1 && (r = sshbuf_put_u32(b, min)) != 0) || + (r = sshbuf_put_u32(b, wantbits)) != 0 || + (max != -1 && (r = sshbuf_put_u32(b, max)) != 0) || + (r = sshbuf_put_bignum2(b, prime)) != 0 || + (r = sshbuf_put_bignum2(b, gen)) != 0 || + (r = sshbuf_put_bignum2(b, client_dh_pub)) != 0 || + (r = sshbuf_put_bignum2(b, server_dh_pub)) != 0 || + (r = sshbuf_put_bignum2(b, shared_secret)) != 0) { + sshbuf_free(b); + return r; } - buffer_put_bignum2(&b, prime); - buffer_put_bignum2(&b, gen); - buffer_put_bignum2(&b, client_dh_pub); - buffer_put_bignum2(&b, server_dh_pub); - buffer_put_bignum2(&b, shared_secret); - #ifdef DEBUG_KEXDH - buffer_dump(&b); + sshbuf_dump(b, stderr); #endif - - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestFinal(&md, digest, NULL); - - buffer_free(&b); - *hash = digest; - *hashlen = EVP_MD_size(evp_md); + if (ssh_digest_buffer(hash_alg, b, hash, *hashlen) != 0) { + sshbuf_free(b); + return SSH_ERR_LIBCRYPTO_ERROR; + } + sshbuf_free(b); + *hashlen = ssh_digest_bytes(hash_alg); #ifdef DEBUG_KEXDH - dump_digest("hash", digest, *hashlen); + dump_digest("hash", hash, *hashlen); #endif + return 0; } +#endif /* WITH_OPENSSL */ diff --git a/kexgexc.c b/kexgexc.c index 79552d7..71ff133 100644 --- a/kexgexc.c +++ b/kexgexc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexgexc.c,v 1.12 2010/11/10 01:33:07 djm Exp $ */ +/* $OpenBSD: kexgexc.c,v 1.22 2015/05/26 23:23:40 dtucker Exp $ */ /* * Copyright (c) 2000 Niels Provos. All rights reserved. * Copyright (c) 2001 Markus Friedl. All rights reserved. @@ -26,6 +26,9 @@ #include "includes.h" +#ifdef WITH_OPENSSL + +#include #include #include @@ -35,173 +38,235 @@ #include #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" #include "dh.h" #include "ssh2.h" #include "compat.h" +#include "dispatch.h" +#include "ssherr.h" +#include "sshbuf.h" -void -kexgex_client(Kex *kex) +static int input_kex_dh_gex_group(int, u_int32_t, void *); +static int input_kex_dh_gex_reply(int, u_int32_t, void *); + +int +kexgex_client(struct ssh *ssh) { - BIGNUM *dh_server_pub = NULL, *shared_secret = NULL; - BIGNUM *p = NULL, *g = NULL; - Key *server_host_key; - u_char *kbuf, *hash, *signature = NULL, *server_host_key_blob = NULL; - u_int klen, slen, sbloblen, hashlen; - int kout; - int min, max, nbits; - DH *dh; + struct kex *kex = ssh->kex; + int r; + u_int nbits; - nbits = dh_estimate(kex->we_need * 8); + nbits = dh_estimate(kex->dh_need * 8); - if (datafellows & SSH_OLD_DHGEX) { - /* Old GEX request */ - packet_start(SSH2_MSG_KEX_DH_GEX_REQUEST_OLD); - packet_put_int(nbits); - min = DH_GRP_MIN; - max = DH_GRP_MAX; - - debug("SSH2_MSG_KEX_DH_GEX_REQUEST_OLD(%u) sent", nbits); - } else { - /* New GEX request */ - min = DH_GRP_MIN; - max = DH_GRP_MAX; - packet_start(SSH2_MSG_KEX_DH_GEX_REQUEST); - packet_put_int(min); - packet_put_int(nbits); - packet_put_int(max); - - debug("SSH2_MSG_KEX_DH_GEX_REQUEST(%u<%u<%u) sent", - min, nbits, max); - } + kex->min = DH_GRP_MIN; + kex->max = DH_GRP_MAX; + kex->nbits = nbits; + if (datafellows & SSH_BUG_DHGEX_LARGE) + kex->nbits = MIN(kex->nbits, 4096); + /* New GEX request */ + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_DH_GEX_REQUEST)) != 0 || + (r = sshpkt_put_u32(ssh, kex->min)) != 0 || + (r = sshpkt_put_u32(ssh, kex->nbits)) != 0 || + (r = sshpkt_put_u32(ssh, kex->max)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; + debug("SSH2_MSG_KEX_DH_GEX_REQUEST(%u<%u<%u) sent", + kex->min, kex->nbits, kex->max); #ifdef DEBUG_KEXDH fprintf(stderr, "\nmin = %d, nbits = %d, max = %d\n", - min, nbits, max); + kex->min, kex->nbits, kex->max); #endif - packet_send(); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_DH_GEX_GROUP, + &input_kex_dh_gex_group); + r = 0; + out: + return r; +} - debug("expecting SSH2_MSG_KEX_DH_GEX_GROUP"); - packet_read_expect(SSH2_MSG_KEX_DH_GEX_GROUP); +static int +input_kex_dh_gex_group(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + BIGNUM *p = NULL, *g = NULL; + int r, bits; - if ((p = BN_new()) == NULL) - fatal("BN_new"); - packet_get_bignum2(p); - if ((g = BN_new()) == NULL) - fatal("BN_new"); - packet_get_bignum2(g); - packet_check_eom(); + debug("got SSH2_MSG_KEX_DH_GEX_GROUP"); - if (BN_num_bits(p) < min || BN_num_bits(p) > max) - fatal("DH_GEX group out of range: %d !< %d !< %d", - min, BN_num_bits(p), max); - - dh = dh_new_group(g, p); - dh_gen_key(dh, kex->we_need * 8); + if ((p = BN_new()) == NULL || + (g = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshpkt_get_bignum2(ssh, p)) != 0 || + (r = sshpkt_get_bignum2(ssh, g)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; + if ((bits = BN_num_bits(p)) < 0 || + (u_int)bits < kex->min || (u_int)bits > kex->max) { + r = SSH_ERR_DH_GEX_OUT_OF_RANGE; + goto out; + } + if ((kex->dh = dh_new_group(g, p)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + p = g = NULL; /* belong to kex->dh now */ + /* generate and send 'e', client DH public key */ + if ((r = dh_gen_key(kex->dh, kex->we_need * 8)) != 0 || + (r = sshpkt_start(ssh, SSH2_MSG_KEX_DH_GEX_INIT)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->pub_key)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; + debug("SSH2_MSG_KEX_DH_GEX_INIT sent"); #ifdef DEBUG_KEXDH - DHparams_print_fp(stderr, dh); + DHparams_print_fp(stderr, kex->dh); fprintf(stderr, "pub= "); - BN_print_fp(stderr, dh->pub_key); + BN_print_fp(stderr, kex->dh->pub_key); fprintf(stderr, "\n"); #endif + ssh_dispatch_set(ssh, SSH2_MSG_KEX_DH_GEX_GROUP, NULL); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_DH_GEX_REPLY, &input_kex_dh_gex_reply); + r = 0; +out: + if (p) + BN_clear_free(p); + if (g) + BN_clear_free(g); + return r; +} - debug("SSH2_MSG_KEX_DH_GEX_INIT sent"); - /* generate and send 'e', client DH public key */ - packet_start(SSH2_MSG_KEX_DH_GEX_INIT); - packet_put_bignum2(dh->pub_key); - packet_send(); - - debug("expecting SSH2_MSG_KEX_DH_GEX_REPLY"); - packet_read_expect(SSH2_MSG_KEX_DH_GEX_REPLY); +static int +input_kex_dh_gex_reply(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + BIGNUM *dh_server_pub = NULL, *shared_secret = NULL; + struct sshkey *server_host_key = NULL; + u_char *kbuf = NULL, *signature = NULL, *server_host_key_blob = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t klen = 0, slen, sbloblen, hashlen; + int kout, r; + debug("got SSH2_MSG_KEX_DH_GEX_REPLY"); + if (kex->verify_host_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } /* key, cert */ - server_host_key_blob = packet_get_string(&sbloblen); - server_host_key = key_from_blob(server_host_key_blob, sbloblen); - if (server_host_key == NULL) - fatal("cannot decode server_host_key_blob"); - if (server_host_key->type != kex->hostkey_type) - fatal("type mismatch for decoded server_host_key_blob"); - if (kex->verify_host_key == NULL) - fatal("cannot verify server_host_key"); - if (kex->verify_host_key(server_host_key) == -1) - fatal("server_host_key verification failed"); - + if ((r = sshpkt_get_string(ssh, &server_host_key_blob, + &sbloblen)) != 0 || + (r = sshkey_from_blob(server_host_key_blob, sbloblen, + &server_host_key)) != 0) + goto out; + if (server_host_key->type != kex->hostkey_type) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (server_host_key->type != kex->hostkey_type || + (kex->hostkey_type == KEY_ECDSA && + server_host_key->ecdsa_nid != kex->hostkey_nid)) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (kex->verify_host_key(server_host_key, ssh) == -1) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } /* DH parameter f, server public DH key */ - if ((dh_server_pub = BN_new()) == NULL) - fatal("dh_server_pub == NULL"); - packet_get_bignum2(dh_server_pub); - + if ((dh_server_pub = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + /* signed H */ + if ((r = sshpkt_get_bignum2(ssh, dh_server_pub)) != 0 || + (r = sshpkt_get_string(ssh, &signature, &slen)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXDH fprintf(stderr, "dh_server_pub= "); BN_print_fp(stderr, dh_server_pub); fprintf(stderr, "\n"); debug("bits %d", BN_num_bits(dh_server_pub)); #endif + if (!dh_pub_is_valid(kex->dh, dh_server_pub)) { + sshpkt_disconnect(ssh, "bad server public DH value"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } - /* signed H */ - signature = packet_get_string(&slen); - packet_check_eom(); - - if (!dh_pub_is_valid(dh, dh_server_pub)) - packet_disconnect("bad server public DH value"); - - klen = DH_size(dh); - kbuf = xmalloc(klen); - if ((kout = DH_compute_key(kbuf, dh_server_pub, dh)) < 0) - fatal("DH_compute_key: failed"); + klen = DH_size(kex->dh); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((kout = DH_compute_key(kbuf, dh_server_pub, kex->dh)) < 0 || + BN_bin2bn(kbuf, kout, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } #ifdef DEBUG_KEXDH dump_digest("shared secret", kbuf, kout); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("kexgex_client: BN_new failed"); - if (BN_bin2bn(kbuf, kout, shared_secret) == NULL) - fatal("kexgex_client: BN_bin2bn failed"); - memset(kbuf, 0, klen); - xfree(kbuf); - - if (datafellows & SSH_OLD_DHGEX) - min = max = -1; + if (ssh->compat & SSH_OLD_DHGEX) + kex->min = kex->max = -1; /* calc and verify H */ - kexgex_hash( - kex->evp_md, + hashlen = sizeof(hash); + if ((r = kexgex_hash( + kex->hash_alg, kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->my), buffer_len(&kex->my), - buffer_ptr(&kex->peer), buffer_len(&kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), server_host_key_blob, sbloblen, - min, nbits, max, - dh->p, dh->g, - dh->pub_key, + kex->min, kex->nbits, kex->max, + kex->dh->p, kex->dh->g, + kex->dh->pub_key, dh_server_pub, shared_secret, - &hash, &hashlen - ); + hash, &hashlen)) != 0) + goto out; - /* have keys, free DH */ - DH_free(dh); - xfree(server_host_key_blob); - BN_clear_free(dh_server_pub); - - if (key_verify(server_host_key, signature, slen, hash, hashlen) != 1) - fatal("key_verify failed for server_host_key"); - key_free(server_host_key); - xfree(signature); + if ((r = sshkey_verify(server_host_key, signature, slen, hash, + hashlen, ssh->compat)) != 0) + goto out; /* save session id */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - kex_finish(kex); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + explicit_bzero(hash, sizeof(hash)); + DH_free(kex->dh); + kex->dh = NULL; + if (dh_server_pub) + BN_clear_free(dh_server_pub); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + sshkey_free(server_host_key); + free(server_host_key_blob); + free(signature); + return r; } +#endif /* WITH_OPENSSL */ diff --git a/kexgexs.c b/kexgexs.c index 3316788..cd1d620 100644 --- a/kexgexs.c +++ b/kexgexs.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kexgexs.c,v 1.14 2010/11/10 01:33:07 djm Exp $ */ +/* $OpenBSD: kexgexs.c,v 1.25 2015/04/13 02:04:08 djm Exp $ */ /* * Copyright (c) 2000 Niels Provos. All rights reserved. * Copyright (c) 2001 Markus Friedl. All rights reserved. @@ -35,7 +35,9 @@ #undef KRB5 #endif -#include +#ifdef WITH_OPENSSL + +#include /* MIN MAX */ #include #include @@ -44,10 +46,9 @@ #include -#include "xmalloc.h" -#include "buffer.h" -#include "key.h" +#include "sshkey.h" #include "cipher.h" +#include "digest.h" #include "kex.h" #include "log.h" #include "packet.h" @@ -58,83 +59,110 @@ #include "ssh-gss.h" #endif #include "monitor_wrap.h" +#include "dispatch.h" +#include "ssherr.h" +#include "sshbuf.h" -void -kexgex_server(Kex *kex) +static int input_kex_dh_gex_request(int, u_int32_t, void *); +static int input_kex_dh_gex_init(int, u_int32_t, void *); + +int +kexgex_server(struct ssh *ssh) { - BIGNUM *shared_secret = NULL, *dh_client_pub = NULL; - Key *server_host_public, *server_host_private; - DH *dh; - u_char *kbuf, *hash, *signature = NULL, *server_host_key_blob = NULL; - u_int sbloblen, klen, slen, hashlen; - int omin = -1, min = -1, omax = -1, max = -1, onbits = -1, nbits = -1; - int type, kout; + ssh_dispatch_set(ssh, SSH2_MSG_KEX_DH_GEX_REQUEST, + &input_kex_dh_gex_request); + debug("expecting SSH2_MSG_KEX_DH_GEX_REQUEST"); + return 0; +} - if (kex->load_host_public_key == NULL || - kex->load_host_private_key == NULL) - fatal("Cannot load hostkey"); - server_host_public = kex->load_host_public_key(kex->hostkey_type); - if (server_host_public == NULL) - fatal("Unsupported hostkey type %d", kex->hostkey_type); - server_host_private = kex->load_host_private_key(kex->hostkey_type); - if (server_host_private == NULL) - fatal("Missing private key for hostkey type %d", - kex->hostkey_type); +static int +input_kex_dh_gex_request(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + int r; + u_int min = 0, max = 0, nbits = 0; + debug("SSH2_MSG_KEX_DH_GEX_REQUEST received"); + if ((r = sshpkt_get_u32(ssh, &min)) != 0 || + (r = sshpkt_get_u32(ssh, &nbits)) != 0 || + (r = sshpkt_get_u32(ssh, &max)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; + kex->nbits = nbits; + kex->min = min; + kex->max = max; + min = MAX(DH_GRP_MIN, min); + max = MIN(DH_GRP_MAX, max); + nbits = MAX(DH_GRP_MIN, nbits); + nbits = MIN(DH_GRP_MAX, nbits); - type = packet_read(); - switch (type) { - case SSH2_MSG_KEX_DH_GEX_REQUEST: - debug("SSH2_MSG_KEX_DH_GEX_REQUEST received"); - omin = min = packet_get_int(); - onbits = nbits = packet_get_int(); - omax = max = packet_get_int(); - min = MAX(DH_GRP_MIN, min); - max = MIN(DH_GRP_MAX, max); - nbits = MAX(DH_GRP_MIN, nbits); - nbits = MIN(DH_GRP_MAX, nbits); - break; - case SSH2_MSG_KEX_DH_GEX_REQUEST_OLD: - debug("SSH2_MSG_KEX_DH_GEX_REQUEST_OLD received"); - onbits = nbits = packet_get_int(); - /* unused for old GEX */ - omin = min = DH_GRP_MIN; - omax = max = DH_GRP_MAX; - break; - default: - fatal("protocol error during kex, no DH_GEX_REQUEST: %d", type); + if (kex->max < kex->min || kex->nbits < kex->min || + kex->max < kex->nbits) { + r = SSH_ERR_DH_GEX_OUT_OF_RANGE; + goto out; } - packet_check_eom(); - - if (omax < omin || onbits < omin || omax < onbits) - fatal("DH_GEX_REQUEST, bad parameters: %d !< %d !< %d", - omin, onbits, omax); /* Contact privileged parent */ - dh = PRIVSEP(choose_dh(min, nbits, max)); - if (dh == NULL) - packet_disconnect("Protocol error: no matching DH grp found"); - + kex->dh = PRIVSEP(choose_dh(min, nbits, max)); + if (kex->dh == NULL) { + sshpkt_disconnect(ssh, "no matching DH grp found"); + r = SSH_ERR_ALLOC_FAIL; + goto out; + } debug("SSH2_MSG_KEX_DH_GEX_GROUP sent"); - packet_start(SSH2_MSG_KEX_DH_GEX_GROUP); - packet_put_bignum2(dh->p); - packet_put_bignum2(dh->g); - packet_send(); - - /* flush */ - packet_write_wait(); + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_DH_GEX_GROUP)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->p)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->g)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; /* Compute our exchange value in parallel with the client */ - dh_gen_key(dh, kex->we_need * 8); + if ((r = dh_gen_key(kex->dh, kex->we_need * 8)) != 0) + goto out; debug("expecting SSH2_MSG_KEX_DH_GEX_INIT"); - packet_read_expect(SSH2_MSG_KEX_DH_GEX_INIT); + ssh_dispatch_set(ssh, SSH2_MSG_KEX_DH_GEX_INIT, &input_kex_dh_gex_init); + r = 0; + out: + return r; +} + +static int +input_kex_dh_gex_init(int type, u_int32_t seq, void *ctxt) +{ + struct ssh *ssh = ctxt; + struct kex *kex = ssh->kex; + BIGNUM *shared_secret = NULL, *dh_client_pub = NULL; + struct sshkey *server_host_public, *server_host_private; + u_char *kbuf = NULL, *signature = NULL, *server_host_key_blob = NULL; + u_char hash[SSH_DIGEST_MAX_LENGTH]; + size_t sbloblen, slen; + size_t klen = 0, hashlen; + int kout, r; + + if (kex->load_host_public_key == NULL || + kex->load_host_private_key == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + server_host_public = kex->load_host_public_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + server_host_private = kex->load_host_private_key(kex->hostkey_type, + kex->hostkey_nid, ssh); + if (server_host_public == NULL) { + r = SSH_ERR_NO_HOSTKEY_LOADED; + goto out; + } /* key, cert */ - if ((dh_client_pub = BN_new()) == NULL) - fatal("dh_client_pub == NULL"); - packet_get_bignum2(dh_client_pub); - packet_check_eom(); + if ((dh_client_pub = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshpkt_get_bignum2(ssh, dh_client_pub)) != 0 || + (r = sshpkt_get_end(ssh)) != 0) + goto out; #ifdef DEBUG_KEXDH fprintf(stderr, "dh_client_pub= "); @@ -144,79 +172,92 @@ kexgex_server(Kex *kex) #endif #ifdef DEBUG_KEXDH - DHparams_print_fp(stderr, dh); + DHparams_print_fp(stderr, kex->dh); fprintf(stderr, "pub= "); - BN_print_fp(stderr, dh->pub_key); + BN_print_fp(stderr, kex->dh->pub_key); fprintf(stderr, "\n"); #endif - if (!dh_pub_is_valid(dh, dh_client_pub)) - packet_disconnect("bad client public DH value"); + if (!dh_pub_is_valid(kex->dh, dh_client_pub)) { + sshpkt_disconnect(ssh, "bad client public DH value"); + r = SSH_ERR_MESSAGE_INCOMPLETE; + goto out; + } - klen = DH_size(dh); - kbuf = xmalloc(klen); - if ((kout = DH_compute_key(kbuf, dh_client_pub, dh)) < 0) - fatal("DH_compute_key: failed"); + klen = DH_size(kex->dh); + if ((kbuf = malloc(klen)) == NULL || + (shared_secret = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((kout = DH_compute_key(kbuf, dh_client_pub, kex->dh)) < 0 || + BN_bin2bn(kbuf, kout, shared_secret) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } #ifdef DEBUG_KEXDH dump_digest("shared secret", kbuf, kout); #endif - if ((shared_secret = BN_new()) == NULL) - fatal("kexgex_server: BN_new failed"); - if (BN_bin2bn(kbuf, kout, shared_secret) == NULL) - fatal("kexgex_server: BN_bin2bn failed"); - memset(kbuf, 0, klen); - xfree(kbuf); - - key_to_blob(server_host_public, &server_host_key_blob, &sbloblen); - - if (type == SSH2_MSG_KEX_DH_GEX_REQUEST_OLD) - omin = min = omax = max = -1; - + if ((r = sshkey_to_blob(server_host_public, &server_host_key_blob, + &sbloblen)) != 0) + goto out; /* calc H */ - kexgex_hash( - kex->evp_md, + hashlen = sizeof(hash); + if ((r = kexgex_hash( + kex->hash_alg, kex->client_version_string, kex->server_version_string, - buffer_ptr(&kex->peer), buffer_len(&kex->peer), - buffer_ptr(&kex->my), buffer_len(&kex->my), + sshbuf_ptr(kex->peer), sshbuf_len(kex->peer), + sshbuf_ptr(kex->my), sshbuf_len(kex->my), server_host_key_blob, sbloblen, - omin, onbits, omax, - dh->p, dh->g, + kex->min, kex->nbits, kex->max, + kex->dh->p, kex->dh->g, dh_client_pub, - dh->pub_key, + kex->dh->pub_key, shared_secret, - &hash, &hashlen - ); - BN_clear_free(dh_client_pub); + hash, &hashlen)) != 0) + goto out; /* save session id := H */ if (kex->session_id == NULL) { kex->session_id_len = hashlen; - kex->session_id = xmalloc(kex->session_id_len); + kex->session_id = malloc(kex->session_id_len); + if (kex->session_id == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(kex->session_id, hash, kex->session_id_len); } /* sign H */ - if (PRIVSEP(key_sign(server_host_private, &signature, &slen, hash, - hashlen)) < 0) - fatal("kexgex_server: key_sign failed"); + if ((r = kex->sign(server_host_private, server_host_public, + &signature, &slen, hash, hashlen, ssh->compat)) < 0) + goto out; /* destroy_sensitive_data(); */ /* send server hostkey, DH pubkey 'f' and singed H */ - debug("SSH2_MSG_KEX_DH_GEX_REPLY sent"); - packet_start(SSH2_MSG_KEX_DH_GEX_REPLY); - packet_put_string(server_host_key_blob, sbloblen); - packet_put_bignum2(dh->pub_key); /* f */ - packet_put_string(signature, slen); - packet_send(); + if ((r = sshpkt_start(ssh, SSH2_MSG_KEX_DH_GEX_REPLY)) != 0 || + (r = sshpkt_put_string(ssh, server_host_key_blob, sbloblen)) != 0 || + (r = sshpkt_put_bignum2(ssh, kex->dh->pub_key)) != 0 || /* f */ + (r = sshpkt_put_string(ssh, signature, slen)) != 0 || + (r = sshpkt_send(ssh)) != 0) + goto out; - xfree(signature); - xfree(server_host_key_blob); - /* have keys, free DH */ - DH_free(dh); - - kex_derive_keys(kex, hash, hashlen, shared_secret); - BN_clear_free(shared_secret); - - kex_finish(kex); + if ((r = kex_derive_keys_bn(ssh, hash, hashlen, shared_secret)) == 0) + r = kex_send_newkeys(ssh); + out: + DH_free(kex->dh); + kex->dh = NULL; + if (dh_client_pub) + BN_clear_free(dh_client_pub); + if (kbuf) { + explicit_bzero(kbuf, klen); + free(kbuf); + } + if (shared_secret) + BN_clear_free(shared_secret); + free(server_host_key_blob); + free(signature); + return r; } +#endif /* WITH_OPENSSL */ diff --git a/key.c b/key.c index 5b08fcc..910ea1a 100644 --- a/key.c +++ b/key.c @@ -1,1977 +1,230 @@ -/* $OpenBSD: key.c,v 1.97 2011/05/17 07:13:31 djm Exp $ */ +/* $OpenBSD: key.c,v 1.128 2015/07/03 03:43:18 djm Exp $ */ /* - * read_bignum(): - * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland - * - * As far as I am concerned, the code I have written for this software - * can be used freely for any purpose. Any derived versions of this - * software must be clearly marked as such, and if the derived work is - * incompatible with the protocol description in the RFC file, it must be - * called by a name other than "ssh" or "Secure Shell". - * - * - * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. - * Copyright (c) 2008 Alexander von Gernler. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * placed in the public domain */ #include "includes.h" -#include -#include - -#include - #ifndef WIN32_FIXME #include #else #include "openbsd-compat/openssl-compat.h" #endif +#include +#include #include #include -#include +#include -#include "xmalloc.h" +#define SSH_KEY_NO_DEFINE #include "key.h" -#include "rsa.h" -#include "uuencode.h" -#include "buffer.h" + +#include "compat.h" +#include "sshkey.h" +#include "ssherr.h" #include "log.h" -#include "misc.h" -#include "ssh2.h" - -static struct KeyCert * -cert_new(void) -{ - struct KeyCert *cert; - - cert = xcalloc(1, sizeof(*cert)); - buffer_init(&cert->certblob); - buffer_init(&cert->critical); - buffer_init(&cert->extensions); - cert->key_id = NULL; - cert->principals = NULL; - cert->signature_key = NULL; - return cert; -} - -Key * -key_new(int type) -{ - Key *k; - RSA *rsa; - DSA *dsa; - k = xcalloc(1, sizeof(*k)); - k->type = type; - k->ecdsa = NULL; - k->ecdsa_nid = -1; - k->dsa = NULL; - k->rsa = NULL; - k->cert = NULL; - switch (k->type) { - case KEY_RSA1: - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - if ((rsa = RSA_new()) == NULL) - fatal("key_new: RSA_new failed"); - if ((rsa->n = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - if ((rsa->e = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - k->rsa = rsa; - break; - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - if ((dsa = DSA_new()) == NULL) - fatal("key_new: DSA_new failed"); - if ((dsa->p = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - if ((dsa->q = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - if ((dsa->g = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - if ((dsa->pub_key = BN_new()) == NULL) - fatal("key_new: BN_new failed"); - k->dsa = dsa; - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - case KEY_ECDSA_CERT: - /* Cannot do anything until we know the group */ - break; -#endif - case KEY_UNSPEC: - break; - default: - fatal("key_new: bad key type %d", k->type); - break; - } - - if (key_is_cert(k)) - k->cert = cert_new(); - - return k; -} +#include "authfile.h" void key_add_private(Key *k) { - switch (k->type) { - case KEY_RSA1: - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - if ((k->rsa->d = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - if ((k->rsa->iqmp = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - if ((k->rsa->q = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - if ((k->rsa->p = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - if ((k->rsa->dmq1 = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - if ((k->rsa->dmp1 = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - break; - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - if ((k->dsa->priv_key = BN_new()) == NULL) - fatal("key_new_private: BN_new failed"); - break; - case KEY_ECDSA: - case KEY_ECDSA_CERT: - /* Cannot do anything until we know the group */ - break; - case KEY_UNSPEC: - break; - default: - break; - } + int r; + + if ((r = sshkey_add_private(k)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); } Key * key_new_private(int type) { - Key *k = key_new(type); + Key *ret = NULL; - key_add_private(k); - return k; + if ((ret = sshkey_new_private(type)) == NULL) + fatal("%s: failed", __func__); + return ret; } -static void -cert_free(struct KeyCert *cert) -{ - u_int i; - - buffer_free(&cert->certblob); - buffer_free(&cert->critical); - buffer_free(&cert->extensions); - if (cert->key_id != NULL) - xfree(cert->key_id); - for (i = 0; i < cert->nprincipals; i++) - xfree(cert->principals[i]); - if (cert->principals != NULL) - xfree(cert->principals); - if (cert->signature_key != NULL) - key_free(cert->signature_key); -} - -void -key_free(Key *k) -{ - if (k == NULL) - fatal("key_free: key is NULL"); - switch (k->type) { - case KEY_RSA1: - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - if (k->rsa != NULL) - RSA_free(k->rsa); - k->rsa = NULL; - break; - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - if (k->dsa != NULL) - DSA_free(k->dsa); - k->dsa = NULL; - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - case KEY_ECDSA_CERT: - if (k->ecdsa != NULL) - EC_KEY_free(k->ecdsa); - k->ecdsa = NULL; - break; -#endif - case KEY_UNSPEC: - break; - default: - fatal("key_free: bad key type %d", k->type); - break; - } - if (key_is_cert(k)) { - if (k->cert != NULL) - cert_free(k->cert); - k->cert = NULL; - } - - xfree(k); -} - -static int -cert_compare(struct KeyCert *a, struct KeyCert *b) -{ - if (a == NULL && b == NULL) - return 1; - if (a == NULL || b == NULL) - return 0; - if (buffer_len(&a->certblob) != buffer_len(&b->certblob)) - return 0; - if (timingsafe_bcmp(buffer_ptr(&a->certblob), buffer_ptr(&b->certblob), - buffer_len(&a->certblob)) != 0) - return 0; - return 1; -} - -/* - * Compare public portions of key only, allowing comparisons between - * certificates and plain keys too. - */ -int -key_equal_public(const Key *a, const Key *b) -{ -#ifdef OPENSSL_HAS_ECC - BN_CTX *bnctx; -#endif - - if (a == NULL || b == NULL || - key_type_plain(a->type) != key_type_plain(b->type)) - return 0; - - switch (a->type) { - case KEY_RSA1: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_RSA: - return a->rsa != NULL && b->rsa != NULL && - BN_cmp(a->rsa->e, b->rsa->e) == 0 && - BN_cmp(a->rsa->n, b->rsa->n) == 0; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_DSA: - return a->dsa != NULL && b->dsa != NULL && - BN_cmp(a->dsa->p, b->dsa->p) == 0 && - BN_cmp(a->dsa->q, b->dsa->q) == 0 && - BN_cmp(a->dsa->g, b->dsa->g) == 0 && - BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - case KEY_ECDSA: - if (a->ecdsa == NULL || b->ecdsa == NULL || - EC_KEY_get0_public_key(a->ecdsa) == NULL || - EC_KEY_get0_public_key(b->ecdsa) == NULL) - return 0; - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - if (EC_GROUP_cmp(EC_KEY_get0_group(a->ecdsa), - EC_KEY_get0_group(b->ecdsa), bnctx) != 0 || - EC_POINT_cmp(EC_KEY_get0_group(a->ecdsa), - EC_KEY_get0_public_key(a->ecdsa), - EC_KEY_get0_public_key(b->ecdsa), bnctx) != 0) { - BN_CTX_free(bnctx); - return 0; - } - BN_CTX_free(bnctx); - return 1; -#endif /* OPENSSL_HAS_ECC */ - default: - fatal("key_equal: bad key type %d", a->type); - } - /* NOTREACHED */ -} - -int -key_equal(const Key *a, const Key *b) -{ - if (a == NULL || b == NULL || a->type != b->type) - return 0; - if (key_is_cert(a)) { - if (!cert_compare(a->cert, b->cert)) - return 0; - } - return key_equal_public(a, b); -} - -u_char* -key_fingerprint_raw(Key *k, enum fp_type dgst_type, u_int *dgst_raw_length) -{ - const EVP_MD *md = NULL; - EVP_MD_CTX ctx; - u_char *blob = NULL; - u_char *retval = NULL; - u_int len = 0; - int nlen, elen, otype; - - *dgst_raw_length = 0; - - switch (dgst_type) { - case SSH_FP_MD5: - md = EVP_md5(); - break; - case SSH_FP_SHA1: - md = EVP_sha1(); - break; - default: - fatal("key_fingerprint_raw: bad digest type %d", - dgst_type); - } - switch (k->type) { - case KEY_RSA1: - nlen = BN_num_bytes(k->rsa->n); - elen = BN_num_bytes(k->rsa->e); - len = nlen + elen; - blob = xmalloc(len); - BN_bn2bin(k->rsa->n, blob); - BN_bn2bin(k->rsa->e, blob + nlen); - break; - case KEY_DSA: - case KEY_ECDSA: - case KEY_RSA: - key_to_blob(k, &blob, &len); - break; - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_ECDSA_CERT: - case KEY_RSA_CERT: - /* We want a fingerprint of the _key_ not of the cert */ - otype = k->type; - k->type = key_type_plain(k->type); - key_to_blob(k, &blob, &len); - k->type = otype; - break; - case KEY_UNSPEC: - return retval; - default: - fatal("key_fingerprint_raw: bad key type %d", k->type); - break; - } - if (blob != NULL) { - retval = xmalloc(EVP_MAX_MD_SIZE); - EVP_DigestInit(&ctx, md); - EVP_DigestUpdate(&ctx, blob, len); - EVP_DigestFinal(&ctx, retval, dgst_raw_length); - memset(blob, 0, len); - xfree(blob); - } else { - fatal("key_fingerprint_raw: blob is null"); - } - return retval; -} - -static char * -key_fingerprint_hex(u_char *dgst_raw, u_int dgst_raw_len) -{ - char *retval; - u_int i; - - retval = xcalloc(1, dgst_raw_len * 3 + 1); - for (i = 0; i < dgst_raw_len; i++) { - char hex[4]; - snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]); - strlcat(retval, hex, dgst_raw_len * 3 + 1); - } - - /* Remove the trailing ':' character */ - retval[(dgst_raw_len * 3) - 1] = '\0'; - return retval; -} - -static char * -key_fingerprint_bubblebabble(u_char *dgst_raw, u_int dgst_raw_len) -{ - char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' }; - char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm', - 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' }; - u_int i, j = 0, rounds, seed = 1; - char *retval; - - rounds = (dgst_raw_len / 2) + 1; - retval = xcalloc((rounds * 6), sizeof(char)); - retval[j++] = 'x'; - for (i = 0; i < rounds; i++) { - u_int idx0, idx1, idx2, idx3, idx4; - if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) { - idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) + - seed) % 6; - idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15; - idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) + - (seed / 6)) % 6; - retval[j++] = vowels[idx0]; - retval[j++] = consonants[idx1]; - retval[j++] = vowels[idx2]; - if ((i + 1) < rounds) { - idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15; - idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15; - retval[j++] = consonants[idx3]; - retval[j++] = '-'; - retval[j++] = consonants[idx4]; - seed = ((seed * 5) + - ((((u_int)(dgst_raw[2 * i])) * 7) + - ((u_int)(dgst_raw[(2 * i) + 1])))) % 36; - } - } else { - idx0 = seed % 6; - idx1 = 16; - idx2 = seed / 6; - retval[j++] = vowels[idx0]; - retval[j++] = consonants[idx1]; - retval[j++] = vowels[idx2]; - } - } - retval[j++] = 'x'; - retval[j++] = '\0'; - return retval; -} - -/* - * Draw an ASCII-Art representing the fingerprint so human brain can - * profit from its built-in pattern recognition ability. - * This technique is called "random art" and can be found in some - * scientific publications like this original paper: - * - * "Hash Visualization: a New Technique to improve Real-World Security", - * Perrig A. and Song D., 1999, International Workshop on Cryptographic - * Techniques and E-Commerce (CrypTEC '99) - * sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf - * - * The subject came up in a talk by Dan Kaminsky, too. - * - * If you see the picture is different, the key is different. - * If the picture looks the same, you still know nothing. - * - * The algorithm used here is a worm crawling over a discrete plane, - * leaving a trace (augmenting the field) everywhere it goes. - * Movement is taken from dgst_raw 2bit-wise. Bumping into walls - * makes the respective movement vector be ignored for this turn. - * Graphs are not unambiguous, because circles in graphs can be - * walked in either direction. - */ - -/* - * Field sizes for the random art. Have to be odd, so the starting point - * can be in the exact middle of the picture, and FLDBASE should be >=8 . - * Else pictures would be too dense, and drawing the frame would - * fail, too, because the key type would not fit in anymore. - */ -#define FLDBASE 8 -#define FLDSIZE_Y (FLDBASE + 1) -#define FLDSIZE_X (FLDBASE * 2 + 1) -static char * -key_fingerprint_randomart(u_char *dgst_raw, u_int dgst_raw_len, const Key *k) -{ - /* - * Chars to be used after each other every time the worm - * intersects with itself. Matter of taste. - */ - char *augmentation_string = " .o+=*BOX@%&#/^SE"; - char *retval, *p; - u_char field[FLDSIZE_X][FLDSIZE_Y]; - u_int i, b; - int x, y; - size_t len = strlen(augmentation_string) - 1; - - retval = xcalloc(1, (FLDSIZE_X + 3) * (FLDSIZE_Y + 2)); - - /* initialize field */ - memset(field, 0, FLDSIZE_X * FLDSIZE_Y * sizeof(char)); - x = FLDSIZE_X / 2; - y = FLDSIZE_Y / 2; - - /* process raw key */ - for (i = 0; i < dgst_raw_len; i++) { - int input; - /* each byte conveys four 2-bit move commands */ - input = dgst_raw[i]; - for (b = 0; b < 4; b++) { - /* evaluate 2 bit, rest is shifted later */ - x += (input & 0x1) ? 1 : -1; - y += (input & 0x2) ? 1 : -1; - - /* assure we are still in bounds */ - x = MAX(x, 0); - y = MAX(y, 0); - x = MIN(x, FLDSIZE_X - 1); - y = MIN(y, FLDSIZE_Y - 1); - - /* augment the field */ - if (field[x][y] < len - 2) - field[x][y]++; - input = input >> 2; - } - } - - /* mark starting point and end point*/ - field[FLDSIZE_X / 2][FLDSIZE_Y / 2] = len - 1; - field[x][y] = len; - - /* fill in retval */ - snprintf(retval, FLDSIZE_X, "+--[%4s %4u]", key_type(k), key_size(k)); - p = strchr(retval, '\0'); - - /* output upper border */ - for (i = p - retval - 1; i < FLDSIZE_X; i++) - *p++ = '-'; - *p++ = '+'; - *p++ = '\n'; - - /* output content */ - for (y = 0; y < FLDSIZE_Y; y++) { - *p++ = '|'; - for (x = 0; x < FLDSIZE_X; x++) - *p++ = augmentation_string[MIN(field[x][y], len)]; - *p++ = '|'; - *p++ = '\n'; - } - - /* output lower border */ - *p++ = '+'; - for (i = 0; i < FLDSIZE_X; i++) - *p++ = '-'; - *p++ = '+'; - - return retval; -} - -char * -key_fingerprint(Key *k, enum fp_type dgst_type, enum fp_rep dgst_rep) -{ - char *retval = NULL; - u_char *dgst_raw; - u_int dgst_raw_len; - - dgst_raw = key_fingerprint_raw(k, dgst_type, &dgst_raw_len); - if (!dgst_raw) - fatal("key_fingerprint: null from key_fingerprint_raw()"); - switch (dgst_rep) { - case SSH_FP_HEX: - retval = key_fingerprint_hex(dgst_raw, dgst_raw_len); - break; - case SSH_FP_BUBBLEBABBLE: - retval = key_fingerprint_bubblebabble(dgst_raw, dgst_raw_len); - break; - case SSH_FP_RANDOMART: - retval = key_fingerprint_randomart(dgst_raw, dgst_raw_len, k); - break; - default: - fatal("key_fingerprint: bad digest representation %d", - dgst_rep); - break; - } - memset(dgst_raw, 0, dgst_raw_len); - xfree(dgst_raw); - return retval; -} - -/* - * Reads a multiple-precision integer in decimal from the buffer, and advances - * the pointer. The integer must already be initialized. This function is - * permitted to modify the buffer. This leaves *cpp to point just beyond the - * last processed (and maybe modified) character. Note that this may modify - * the buffer containing the number. - */ -static int -read_bignum(char **cpp, BIGNUM * value) -{ - char *cp = *cpp; - int old; - - /* Skip any leading whitespace. */ - for (; *cp == ' ' || *cp == '\t'; cp++) - ; - - /* Check that it begins with a decimal digit. */ - if (*cp < '0' || *cp > '9') - return 0; - - /* Save starting position. */ - *cpp = cp; - - /* Move forward until all decimal digits skipped. */ - for (; *cp >= '0' && *cp <= '9'; cp++) - ; - - /* Save the old terminating character, and replace it by \0. */ - old = *cp; - *cp = 0; - - /* Parse the number. */ - if (BN_dec2bn(&value, *cpp) == 0) - return 0; - - /* Restore old terminating character. */ - *cp = old; - - /* Move beyond the number and return success. */ - *cpp = cp; - return 1; -} - -static int -write_bignum(FILE *f, BIGNUM *num) -{ - char *buf = BN_bn2dec(num); - if (buf == NULL) { - error("write_bignum: BN_bn2dec() failed"); - return 0; - } - fprintf(f, " %s", buf); - OPENSSL_free(buf); - return 1; -} - -/* returns 1 ok, -1 error */ int key_read(Key *ret, char **cpp) { - Key *k; - int success = -1; - char *cp, *space; - int len, n, type; - u_int bits; - u_char *blob; -#ifdef OPENSSL_HAS_ECC - int curve_nid = -1; -#endif - - cp = *cpp; - - switch (ret->type) { - case KEY_RSA1: - /* Get number of bits. */ - if (*cp < '0' || *cp > '9') - return -1; /* Bad bit count... */ - for (bits = 0; *cp >= '0' && *cp <= '9'; cp++) - bits = 10 * bits + *cp - '0'; - if (bits == 0) - return -1; - *cpp = cp; - /* Get public exponent, public modulus. */ - if (!read_bignum(cpp, ret->rsa->e)) - return -1; - if (!read_bignum(cpp, ret->rsa->n)) - return -1; - /* validate the claimed number of bits */ - if ((u_int)BN_num_bits(ret->rsa->n) != bits) { - verbose("key_read: claimed key size %d does not match " - "actual %d", bits, BN_num_bits(ret->rsa->n)); - return -1; - } - success = 1; - break; - case KEY_UNSPEC: - case KEY_RSA: - case KEY_DSA: - case KEY_ECDSA: - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_ECDSA_CERT: - case KEY_RSA_CERT: - space = strchr(cp, ' '); - if (space == NULL) { - debug3("key_read: missing whitespace"); - return -1; - } - *space = '\0'; - type = key_type_from_name(cp); -#ifdef OPENSSL_HAS_ECC - if (key_type_plain(type) == KEY_ECDSA && - (curve_nid = key_ecdsa_nid_from_name(cp)) == -1) { - debug("key_read: invalid curve"); - return -1; - } -#endif - *space = ' '; - if (type == KEY_UNSPEC) { - debug3("key_read: missing keytype"); - return -1; - } - cp = space+1; - if (*cp == '\0') { - debug3("key_read: short string"); - return -1; - } - if (ret->type == KEY_UNSPEC) { - ret->type = type; - } else if (ret->type != type) { - /* is a key, but different type */ - debug3("key_read: type mismatch"); - return -1; - } - len = 2*strlen(cp); - blob = xmalloc(len); - n = uudecode(cp, blob, len); - if (n < 0) { - error("key_read: uudecode %s failed", cp); - xfree(blob); - return -1; - } - k = key_from_blob(blob, (u_int)n); - xfree(blob); - if (k == NULL) { - error("key_read: key_from_blob %s failed", cp); - return -1; - } - if (k->type != type) { - error("key_read: type mismatch: encoding error"); - key_free(k); - return -1; - } -#ifdef OPENSSL_HAS_ECC - if (key_type_plain(type) == KEY_ECDSA && - curve_nid != k->ecdsa_nid) { - error("key_read: type mismatch: EC curve mismatch"); - key_free(k); - return -1; - } -#endif -/*XXXX*/ - if (key_is_cert(ret)) { - if (!key_is_cert(k)) { - error("key_read: loaded key is not a cert"); - key_free(k); - return -1; - } - if (ret->cert != NULL) - cert_free(ret->cert); - ret->cert = k->cert; - k->cert = NULL; - } - if (key_type_plain(ret->type) == KEY_RSA) { - if (ret->rsa != NULL) - RSA_free(ret->rsa); - ret->rsa = k->rsa; - k->rsa = NULL; -#ifdef DEBUG_PK - RSA_print_fp(stderr, ret->rsa, 8); -#endif - } - if (key_type_plain(ret->type) == KEY_DSA) { - if (ret->dsa != NULL) - DSA_free(ret->dsa); - ret->dsa = k->dsa; - k->dsa = NULL; -#ifdef DEBUG_PK - DSA_print_fp(stderr, ret->dsa, 8); -#endif - } -#ifdef OPENSSL_HAS_ECC - if (key_type_plain(ret->type) == KEY_ECDSA) { - if (ret->ecdsa != NULL) - EC_KEY_free(ret->ecdsa); - ret->ecdsa = k->ecdsa; - ret->ecdsa_nid = k->ecdsa_nid; - k->ecdsa = NULL; - k->ecdsa_nid = -1; -#ifdef DEBUG_PK - key_dump_ec_key(ret->ecdsa); -#endif - } -#endif - success = 1; -/*XXXX*/ - key_free(k); - if (success != 1) - break; - /* advance cp: skip whitespace and data */ - while (*cp == ' ' || *cp == '\t') - cp++; - while (*cp != '\0' && *cp != ' ' && *cp != '\t') - cp++; - *cpp = cp; - break; - default: - fatal("key_read: bad key type: %d", ret->type); - break; - } - return success; + return sshkey_read(ret, cpp) == 0 ? 1 : -1; } int key_write(const Key *key, FILE *f) { - int n, success = 0; - u_int len, bits = 0; - u_char *blob; - char *uu; - - if (key_is_cert(key)) { - if (key->cert == NULL) { - error("%s: no cert data", __func__); - return 0; - } - if (buffer_len(&key->cert->certblob) == 0) { - error("%s: no signed certificate blob", __func__); - return 0; - } - } - - switch (key->type) { - case KEY_RSA1: - if (key->rsa == NULL) - return 0; - /* size of modulus 'n' */ - bits = BN_num_bits(key->rsa->n); - fprintf(f, "%u", bits); - if (write_bignum(f, key->rsa->e) && - write_bignum(f, key->rsa->n)) - return 1; - error("key_write: failed for RSA key"); - return 0; - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - if (key->dsa == NULL) - return 0; - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - case KEY_ECDSA_CERT: - if (key->ecdsa == NULL) - return 0; - break; -#endif - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - if (key->rsa == NULL) - return 0; - break; - default: - return 0; - } - - key_to_blob(key, &blob, &len); - uu = xmalloc(2*len); - n = uuencode(blob, len, uu, 2*len); - if (n > 0) { - fprintf(f, "%s %s", key_ssh_name(key), uu); - success = 1; - } - xfree(blob); - xfree(uu); - - return success; + return sshkey_write(key, f) == 0 ? 1 : 0; } -const char * -key_type(const Key *k) -{ - switch (k->type) { - case KEY_RSA1: - return "RSA1"; - case KEY_RSA: - return "RSA"; - case KEY_DSA: - return "DSA"; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - return "ECDSA"; -#endif - case KEY_RSA_CERT_V00: - return "RSA-CERT-V00"; - case KEY_DSA_CERT_V00: - return "DSA-CERT-V00"; - case KEY_RSA_CERT: - return "RSA-CERT"; - case KEY_DSA_CERT: - return "DSA-CERT"; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - return "ECDSA-CERT"; -#endif - } - return "unknown"; -} - -const char * -key_cert_type(const Key *k) -{ - switch (k->cert->type) { - case SSH2_CERT_TYPE_USER: - return "user"; - case SSH2_CERT_TYPE_HOST: - return "host"; - default: - return "unknown"; - } -} - -static const char * -key_ssh_name_from_type_nid(int type, int nid) -{ - switch (type) { - case KEY_RSA: - return "ssh-rsa"; - case KEY_DSA: - return "ssh-dss"; - case KEY_RSA_CERT_V00: - return "ssh-rsa-cert-v00@openssh.com"; - case KEY_DSA_CERT_V00: - return "ssh-dss-cert-v00@openssh.com"; - case KEY_RSA_CERT: - return "ssh-rsa-cert-v01@openssh.com"; - case KEY_DSA_CERT: - return "ssh-dss-cert-v01@openssh.com"; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - switch (nid) { - case NID_X9_62_prime256v1: - return "ecdsa-sha2-nistp256"; - case NID_secp384r1: - return "ecdsa-sha2-nistp384"; - case NID_secp521r1: - return "ecdsa-sha2-nistp521"; - default: - break; - } - break; - case KEY_ECDSA_CERT: - switch (nid) { - case NID_X9_62_prime256v1: - return "ecdsa-sha2-nistp256-cert-v01@openssh.com"; - case NID_secp384r1: - return "ecdsa-sha2-nistp384-cert-v01@openssh.com"; - case NID_secp521r1: - return "ecdsa-sha2-nistp521-cert-v01@openssh.com"; - default: - break; - } - break; -#endif /* OPENSSL_HAS_ECC */ - } - return "ssh-unknown"; -} - -const char * -key_ssh_name(const Key *k) -{ - return key_ssh_name_from_type_nid(k->type, k->ecdsa_nid); -} - -const char * -key_ssh_name_plain(const Key *k) -{ - return key_ssh_name_from_type_nid(key_type_plain(k->type), - k->ecdsa_nid); -} - -u_int -key_size(const Key *k) -{ - switch (k->type) { - case KEY_RSA1: - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - return BN_num_bits(k->rsa->n); - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - return BN_num_bits(k->dsa->p); -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - case KEY_ECDSA_CERT: - return key_curve_nid_to_bits(k->ecdsa_nid); -#endif - } - return 0; -} - -static RSA * -rsa_generate_private_key(u_int bits) -{ - RSA *private = RSA_new(); - BIGNUM *f4 = BN_new(); - - if (private == NULL) - fatal("%s: RSA_new failed", __func__); - if (f4 == NULL) - fatal("%s: BN_new failed", __func__); - if (!BN_set_word(f4, RSA_F4)) - fatal("%s: BN_new failed", __func__); - if (!RSA_generate_key_ex(private, bits, f4, NULL)) - fatal("%s: key generation failed.", __func__); - BN_free(f4); - return private; -} - -static DSA* -dsa_generate_private_key(u_int bits) -{ - DSA *private = DSA_new(); - - if (private == NULL) - fatal("%s: DSA_new failed", __func__); - if (!DSA_generate_parameters_ex(private, bits, NULL, 0, NULL, - NULL, NULL)) - fatal("%s: DSA_generate_parameters failed", __func__); - if (!DSA_generate_key(private)) - fatal("%s: DSA_generate_key failed.", __func__); - return private; -} - -int -key_ecdsa_bits_to_nid(int bits) -{ - switch (bits) { -#ifdef OPENSSL_HAS_ECC - case 256: - return NID_X9_62_prime256v1; - case 384: - return NID_secp384r1; - case 521: - return NID_secp521r1; -#endif - default: - return -1; - } -} - -#ifdef OPENSSL_HAS_ECC -int -key_ecdsa_key_to_nid(EC_KEY *k) -{ - EC_GROUP *eg; - int nids[] = { - NID_X9_62_prime256v1, - NID_secp384r1, - NID_secp521r1, - -1 - }; - int nid; - u_int i; - BN_CTX *bnctx; - const EC_GROUP *g = EC_KEY_get0_group(k); - - /* - * The group may be stored in a ASN.1 encoded private key in one of two - * ways: as a "named group", which is reconstituted by ASN.1 object ID - * or explicit group parameters encoded into the key blob. Only the - * "named group" case sets the group NID for us, but we can figure - * it out for the other case by comparing against all the groups that - * are supported. - */ - if ((nid = EC_GROUP_get_curve_name(g)) > 0) - return nid; - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new() failed", __func__); - for (i = 0; nids[i] != -1; i++) { - if ((eg = EC_GROUP_new_by_curve_name(nids[i])) == NULL) - fatal("%s: EC_GROUP_new_by_curve_name failed", - __func__); - if (EC_GROUP_cmp(g, eg, bnctx) == 0) - break; - EC_GROUP_free(eg); - } - BN_CTX_free(bnctx); - debug3("%s: nid = %d", __func__, nids[i]); - if (nids[i] != -1) { - /* Use the group with the NID attached */ - EC_GROUP_set_asn1_flag(eg, OPENSSL_EC_NAMED_CURVE); - if (EC_KEY_set_group(k, eg) != 1) - fatal("%s: EC_KEY_set_group", __func__); - } - return nids[i]; -} - -static EC_KEY* -ecdsa_generate_private_key(u_int bits, int *nid) -{ - EC_KEY *private; - - if ((*nid = key_ecdsa_bits_to_nid(bits)) == -1) - fatal("%s: invalid key length", __func__); - if ((private = EC_KEY_new_by_curve_name(*nid)) == NULL) - fatal("%s: EC_KEY_new_by_curve_name failed", __func__); - if (EC_KEY_generate_key(private) != 1) - fatal("%s: EC_KEY_generate_key failed", __func__); - EC_KEY_set_asn1_flag(private, OPENSSL_EC_NAMED_CURVE); - return private; -} -#endif /* OPENSSL_HAS_ECC */ - Key * key_generate(int type, u_int bits) { - Key *k = key_new(KEY_UNSPEC); - switch (type) { - case KEY_DSA: - k->dsa = dsa_generate_private_key(bits); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - k->ecdsa = ecdsa_generate_private_key(bits, &k->ecdsa_nid); - break; -#endif - case KEY_RSA: - case KEY_RSA1: - k->rsa = rsa_generate_private_key(bits); - break; - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_DSA_CERT: - fatal("key_generate: cert keys cannot be generated directly"); - default: - fatal("key_generate: unknown type %d", type); - } - k->type = type; - return k; + int r; + Key *ret = NULL; + + if ((r = sshkey_generate(type, bits, &ret)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return ret; } void -key_cert_copy(const Key *from_key, struct Key *to_key) +key_cert_copy(const Key *from_key, Key *to_key) { - u_int i; - const struct KeyCert *from; - struct KeyCert *to; + int r; - if (to_key->cert != NULL) { - cert_free(to_key->cert); - to_key->cert = NULL; - } - - if ((from = from_key->cert) == NULL) - return; - - to = to_key->cert = cert_new(); - - buffer_append(&to->certblob, buffer_ptr(&from->certblob), - buffer_len(&from->certblob)); - - buffer_append(&to->critical, - buffer_ptr(&from->critical), buffer_len(&from->critical)); - buffer_append(&to->extensions, - buffer_ptr(&from->extensions), buffer_len(&from->extensions)); - - to->serial = from->serial; - to->type = from->type; - to->key_id = from->key_id == NULL ? NULL : xstrdup(from->key_id); - to->valid_after = from->valid_after; - to->valid_before = from->valid_before; - to->signature_key = from->signature_key == NULL ? - NULL : key_from_private(from->signature_key); - - to->nprincipals = from->nprincipals; - if (to->nprincipals > CERT_MAX_PRINCIPALS) - fatal("%s: nprincipals (%u) > CERT_MAX_PRINCIPALS (%u)", - __func__, to->nprincipals, CERT_MAX_PRINCIPALS); - if (to->nprincipals > 0) { - to->principals = xcalloc(from->nprincipals, - sizeof(*to->principals)); - for (i = 0; i < to->nprincipals; i++) - to->principals[i] = xstrdup(from->principals[i]); - } + if ((r = sshkey_cert_copy(from_key, to_key)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); } Key * key_from_private(const Key *k) { - Key *n = NULL; - switch (k->type) { - case KEY_DSA: - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - n = key_new(k->type); - if ((BN_copy(n->dsa->p, k->dsa->p) == NULL) || - (BN_copy(n->dsa->q, k->dsa->q) == NULL) || - (BN_copy(n->dsa->g, k->dsa->g) == NULL) || - (BN_copy(n->dsa->pub_key, k->dsa->pub_key) == NULL)) - fatal("key_from_private: BN_copy failed"); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - case KEY_ECDSA_CERT: - n = key_new(k->type); - n->ecdsa_nid = k->ecdsa_nid; - if ((n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid)) == NULL) - fatal("%s: EC_KEY_new_by_curve_name failed", __func__); - if (EC_KEY_set_public_key(n->ecdsa, - EC_KEY_get0_public_key(k->ecdsa)) != 1) - fatal("%s: EC_KEY_set_public_key failed", __func__); - break; -#endif - case KEY_RSA: - case KEY_RSA1: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - n = key_new(k->type); - if ((BN_copy(n->rsa->n, k->rsa->n) == NULL) || - (BN_copy(n->rsa->e, k->rsa->e) == NULL)) - fatal("key_from_private: BN_copy failed"); - break; - default: - fatal("key_from_private: unknown type %d", k->type); - break; - } - if (key_is_cert(k)) - key_cert_copy(k, n); - return n; -} + int r; + Key *ret = NULL; -int -key_type_from_name(char *name) -{ - if (strcmp(name, "rsa1") == 0) { - return KEY_RSA1; - } else if (strcmp(name, "rsa") == 0) { - return KEY_RSA; - } else if (strcmp(name, "dsa") == 0) { - return KEY_DSA; - } else if (strcmp(name, "ssh-rsa") == 0) { - return KEY_RSA; - } else if (strcmp(name, "ssh-dss") == 0) { - return KEY_DSA; -#ifdef OPENSSL_HAS_ECC - } else if (strcmp(name, "ecdsa") == 0 || - strcmp(name, "ecdsa-sha2-nistp256") == 0 || - strcmp(name, "ecdsa-sha2-nistp384") == 0 || - strcmp(name, "ecdsa-sha2-nistp521") == 0) { - return KEY_ECDSA; -#endif - } else if (strcmp(name, "ssh-rsa-cert-v00@openssh.com") == 0) { - return KEY_RSA_CERT_V00; - } else if (strcmp(name, "ssh-dss-cert-v00@openssh.com") == 0) { - return KEY_DSA_CERT_V00; - } else if (strcmp(name, "ssh-rsa-cert-v01@openssh.com") == 0) { - return KEY_RSA_CERT; - } else if (strcmp(name, "ssh-dss-cert-v01@openssh.com") == 0) { - return KEY_DSA_CERT; -#ifdef OPENSSL_HAS_ECC - } else if (strcmp(name, "ecdsa-sha2-nistp256-cert-v01@openssh.com") == 0 || - strcmp(name, "ecdsa-sha2-nistp384-cert-v01@openssh.com") == 0 || - strcmp(name, "ecdsa-sha2-nistp521-cert-v01@openssh.com") == 0) { - return KEY_ECDSA_CERT; -#endif - } - - debug2("key_type_from_name: unknown key type '%s'", name); - return KEY_UNSPEC; -} - -int -key_ecdsa_nid_from_name(const char *name) -{ -#ifdef OPENSSL_HAS_ECC - if (strcmp(name, "ecdsa-sha2-nistp256") == 0 || - strcmp(name, "ecdsa-sha2-nistp256-cert-v01@openssh.com") == 0) - return NID_X9_62_prime256v1; - if (strcmp(name, "ecdsa-sha2-nistp384") == 0 || - strcmp(name, "ecdsa-sha2-nistp384-cert-v01@openssh.com") == 0) - return NID_secp384r1; - if (strcmp(name, "ecdsa-sha2-nistp521") == 0 || - strcmp(name, "ecdsa-sha2-nistp521-cert-v01@openssh.com") == 0) - return NID_secp521r1; -#endif /* OPENSSL_HAS_ECC */ - - debug2("%s: unknown/non-ECDSA key type '%s'", __func__, name); - return -1; -} - -int -key_names_valid2(const char *names) -{ - char *s, *cp, *p; - - if (names == NULL || strcmp(names, "") == 0) - return 0; - s = cp = xstrdup(names); - for ((p = strsep(&cp, ",")); p && *p != '\0'; - (p = strsep(&cp, ","))) { - switch (key_type_from_name(p)) { - case KEY_RSA1: - case KEY_UNSPEC: - xfree(s); - return 0; - } - } - debug3("key names ok: [%s]", names); - xfree(s); - return 1; -} - -static int -cert_parse(Buffer *b, Key *key, const u_char *blob, u_int blen) -{ - u_char *principals, *critical, *exts, *sig_key, *sig; - u_int signed_len, plen, clen, sklen, slen, kidlen, elen; - Buffer tmp; - char *principal; - int ret = -1; - int v00 = key->type == KEY_DSA_CERT_V00 || - key->type == KEY_RSA_CERT_V00; - - buffer_init(&tmp); - - /* Copy the entire key blob for verification and later serialisation */ - buffer_append(&key->cert->certblob, blob, blen); - - elen = 0; /* Not touched for v00 certs */ - principals = exts = critical = sig_key = sig = NULL; - if ((!v00 && buffer_get_int64_ret(&key->cert->serial, b) != 0) || - buffer_get_int_ret(&key->cert->type, b) != 0 || - (key->cert->key_id = buffer_get_cstring_ret(b, &kidlen)) == NULL || - (principals = buffer_get_string_ret(b, &plen)) == NULL || - buffer_get_int64_ret(&key->cert->valid_after, b) != 0 || - buffer_get_int64_ret(&key->cert->valid_before, b) != 0 || - (critical = buffer_get_string_ret(b, &clen)) == NULL || - (!v00 && (exts = buffer_get_string_ret(b, &elen)) == NULL) || - (v00 && buffer_get_string_ptr_ret(b, NULL) == NULL) || /* nonce */ - buffer_get_string_ptr_ret(b, NULL) == NULL || /* reserved */ - (sig_key = buffer_get_string_ret(b, &sklen)) == NULL) { - error("%s: parse error", __func__); - goto out; - } - - if (kidlen != strlen(key->cert->key_id)) { - error("%s: key ID contains \\0 character", __func__); - goto out; - } - - /* Signature is left in the buffer so we can calculate this length */ - signed_len = buffer_len(&key->cert->certblob) - buffer_len(b); - - if ((sig = buffer_get_string_ret(b, &slen)) == NULL) { - error("%s: parse error", __func__); - goto out; - } - - if (key->cert->type != SSH2_CERT_TYPE_USER && - key->cert->type != SSH2_CERT_TYPE_HOST) { - error("Unknown certificate type %u", key->cert->type); - goto out; - } - - buffer_append(&tmp, principals, plen); - while (buffer_len(&tmp) > 0) { - if (key->cert->nprincipals >= CERT_MAX_PRINCIPALS) { - error("%s: Too many principals", __func__); - goto out; - } - if ((principal = buffer_get_cstring_ret(&tmp, &plen)) == NULL) { - error("%s: Principals data invalid", __func__); - goto out; - } - key->cert->principals = xrealloc(key->cert->principals, - key->cert->nprincipals + 1, sizeof(*key->cert->principals)); - key->cert->principals[key->cert->nprincipals++] = principal; - } - - buffer_clear(&tmp); - - buffer_append(&key->cert->critical, critical, clen); - buffer_append(&tmp, critical, clen); - /* validate structure */ - while (buffer_len(&tmp) != 0) { - if (buffer_get_string_ptr_ret(&tmp, NULL) == NULL || - buffer_get_string_ptr_ret(&tmp, NULL) == NULL) { - error("%s: critical option data invalid", __func__); - goto out; - } - } - buffer_clear(&tmp); - - buffer_append(&key->cert->extensions, exts, elen); - buffer_append(&tmp, exts, elen); - /* validate structure */ - while (buffer_len(&tmp) != 0) { - if (buffer_get_string_ptr_ret(&tmp, NULL) == NULL || - buffer_get_string_ptr_ret(&tmp, NULL) == NULL) { - error("%s: extension data invalid", __func__); - goto out; - } - } - buffer_clear(&tmp); - - if ((key->cert->signature_key = key_from_blob(sig_key, - sklen)) == NULL) { - error("%s: Signature key invalid", __func__); - goto out; - } - if (key->cert->signature_key->type != KEY_RSA && - key->cert->signature_key->type != KEY_DSA && - key->cert->signature_key->type != KEY_ECDSA) { - error("%s: Invalid signature key type %s (%d)", __func__, - key_type(key->cert->signature_key), - key->cert->signature_key->type); - goto out; - } - - switch (key_verify(key->cert->signature_key, sig, slen, - buffer_ptr(&key->cert->certblob), signed_len)) { - case 1: - ret = 0; - break; /* Good signature */ - case 0: - error("%s: Invalid signature on certificate", __func__); - goto out; - case -1: - error("%s: Certificate signature verification failed", - __func__); - goto out; - } - - out: - buffer_free(&tmp); - if (principals != NULL) - xfree(principals); - if (critical != NULL) - xfree(critical); - if (exts != NULL) - xfree(exts); - if (sig_key != NULL) - xfree(sig_key); - if (sig != NULL) - xfree(sig); + if ((r = sshkey_from_private(k, &ret)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); return ret; } +static void +fatal_on_fatal_errors(int r, const char *func, int extra_fatal) +{ + if (r == SSH_ERR_INTERNAL_ERROR || + r == SSH_ERR_ALLOC_FAIL || + (extra_fatal != 0 && r == extra_fatal)) + fatal("%s: %s", func, ssh_err(r)); +} + Key * key_from_blob(const u_char *blob, u_int blen) { - Buffer b; - int rlen, type; - char *ktype = NULL, *curve = NULL; - Key *key = NULL; -#ifdef OPENSSL_HAS_ECC - EC_POINT *q = NULL; - int nid = -1; -#endif + int r; + Key *ret = NULL; -#ifdef DEBUG_PK - dump_base64(stderr, blob, blen); -#endif - buffer_init(&b); - buffer_append(&b, blob, blen); - if ((ktype = buffer_get_cstring_ret(&b, NULL)) == NULL) { - error("key_from_blob: can't read key type"); - goto out; + if ((r = sshkey_from_blob(blob, blen, &ret)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); + return NULL; } - - type = key_type_from_name(ktype); -#ifdef OPENSSL_HAS_ECC - if (key_type_plain(type) == KEY_ECDSA) - nid = key_ecdsa_nid_from_name(ktype); -#endif - - switch (type) { - case KEY_RSA_CERT: - (void)buffer_get_string_ptr_ret(&b, NULL); /* Skip nonce */ - /* FALLTHROUGH */ - case KEY_RSA: - case KEY_RSA_CERT_V00: - key = key_new(type); - if (buffer_get_bignum2_ret(&b, key->rsa->e) == -1 || - buffer_get_bignum2_ret(&b, key->rsa->n) == -1) { - error("key_from_blob: can't read rsa key"); - badkey: - key_free(key); - key = NULL; - goto out; - } -#ifdef DEBUG_PK - RSA_print_fp(stderr, key->rsa, 8); -#endif - break; - case KEY_DSA_CERT: - (void)buffer_get_string_ptr_ret(&b, NULL); /* Skip nonce */ - /* FALLTHROUGH */ - case KEY_DSA: - case KEY_DSA_CERT_V00: - key = key_new(type); - if (buffer_get_bignum2_ret(&b, key->dsa->p) == -1 || - buffer_get_bignum2_ret(&b, key->dsa->q) == -1 || - buffer_get_bignum2_ret(&b, key->dsa->g) == -1 || - buffer_get_bignum2_ret(&b, key->dsa->pub_key) == -1) { - error("key_from_blob: can't read dsa key"); - goto badkey; - } -#ifdef DEBUG_PK - DSA_print_fp(stderr, key->dsa, 8); -#endif - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - (void)buffer_get_string_ptr_ret(&b, NULL); /* Skip nonce */ - /* FALLTHROUGH */ - case KEY_ECDSA: - key = key_new(type); - key->ecdsa_nid = nid; - if ((curve = buffer_get_string_ret(&b, NULL)) == NULL) { - error("key_from_blob: can't read ecdsa curve"); - goto badkey; - } - if (key->ecdsa_nid != key_curve_name_to_nid(curve)) { - error("key_from_blob: ecdsa curve doesn't match type"); - goto badkey; - } - if (key->ecdsa != NULL) - EC_KEY_free(key->ecdsa); - if ((key->ecdsa = EC_KEY_new_by_curve_name(key->ecdsa_nid)) - == NULL) - fatal("key_from_blob: EC_KEY_new_by_curve_name failed"); - if ((q = EC_POINT_new(EC_KEY_get0_group(key->ecdsa))) == NULL) - fatal("key_from_blob: EC_POINT_new failed"); - if (buffer_get_ecpoint_ret(&b, EC_KEY_get0_group(key->ecdsa), - q) == -1) { - error("key_from_blob: can't read ecdsa key point"); - goto badkey; - } - if (key_ec_validate_public(EC_KEY_get0_group(key->ecdsa), - q) != 0) - goto badkey; - if (EC_KEY_set_public_key(key->ecdsa, q) != 1) - fatal("key_from_blob: EC_KEY_set_public_key failed"); -#ifdef DEBUG_PK - key_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q); -#endif - break; -#endif /* OPENSSL_HAS_ECC */ - case KEY_UNSPEC: - key = key_new(type); - break; - default: - error("key_from_blob: cannot handle type %s", ktype); - goto out; - } - if (key_is_cert(key) && cert_parse(&b, key, blob, blen) == -1) { - error("key_from_blob: can't parse cert data"); - goto badkey; - } - rlen = buffer_len(&b); - if (key != NULL && rlen != 0) - error("key_from_blob: remaining bytes in key blob %d", rlen); - out: - if (ktype != NULL) - xfree(ktype); - if (curve != NULL) - xfree(curve); -#ifdef OPENSSL_HAS_ECC - if (q != NULL) - EC_POINT_free(q); -#endif - buffer_free(&b); - return key; + return ret; } int key_to_blob(const Key *key, u_char **blobp, u_int *lenp) { - Buffer b; - int len; + u_char *blob; + size_t blen; + int r; - if (key == NULL) { - error("key_to_blob: key == NULL"); - return 0; - } - buffer_init(&b); - switch (key->type) { - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_ECDSA_CERT: - case KEY_RSA_CERT: - /* Use the existing blob */ - buffer_append(&b, buffer_ptr(&key->cert->certblob), - buffer_len(&key->cert->certblob)); - break; - case KEY_DSA: - buffer_put_cstring(&b, key_ssh_name(key)); - buffer_put_bignum2(&b, key->dsa->p); - buffer_put_bignum2(&b, key->dsa->q); - buffer_put_bignum2(&b, key->dsa->g); - buffer_put_bignum2(&b, key->dsa->pub_key); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - buffer_put_cstring(&b, key_ssh_name(key)); - buffer_put_cstring(&b, key_curve_nid_to_name(key->ecdsa_nid)); - buffer_put_ecpoint(&b, EC_KEY_get0_group(key->ecdsa), - EC_KEY_get0_public_key(key->ecdsa)); - break; -#endif - case KEY_RSA: - buffer_put_cstring(&b, key_ssh_name(key)); - buffer_put_bignum2(&b, key->rsa->e); - buffer_put_bignum2(&b, key->rsa->n); - break; - default: - error("key_to_blob: unsupported key type %d", key->type); - buffer_free(&b); - return 0; - } - len = buffer_len(&b); + if (blobp != NULL) + *blobp = NULL; if (lenp != NULL) - *lenp = len; - if (blobp != NULL) { - *blobp = xmalloc(len); - memcpy(*blobp, buffer_ptr(&b), len); + *lenp = 0; + if ((r = sshkey_to_blob(key, &blob, &blen)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); + return 0; } - memset(buffer_ptr(&b), 0, len); - buffer_free(&b); - return len; + if (blen > INT_MAX) + fatal("%s: giant len %zu", __func__, blen); + if (blobp != NULL) + *blobp = blob; + if (lenp != NULL) + *lenp = blen; + return blen; } int -key_sign( - const Key *key, - u_char **sigp, u_int *lenp, +key_sign(const Key *key, u_char **sigp, u_int *lenp, const u_char *data, u_int datalen) { - switch (key->type) { - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_DSA: - return ssh_dss_sign(key, sigp, lenp, data, datalen); -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - case KEY_ECDSA: - return ssh_ecdsa_sign(key, sigp, lenp, data, datalen); -#endif - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_RSA: - return ssh_rsa_sign(key, sigp, lenp, data, datalen); - default: - error("key_sign: invalid key type %d", key->type); + int r; + u_char *sig; + size_t siglen; + + if (sigp != NULL) + *sigp = NULL; + if (lenp != NULL) + *lenp = 0; + if ((r = sshkey_sign(key, &sig, &siglen, + data, datalen, datafellows)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); return -1; } + if (siglen > INT_MAX) + fatal("%s: giant len %zu", __func__, siglen); + if (sigp != NULL) + *sigp = sig; + if (lenp != NULL) + *lenp = siglen; + return 0; } -/* - * key_verify returns 1 for a correct signature, 0 for an incorrect signature - * and -1 on error. - */ int -key_verify( - const Key *key, - const u_char *signature, u_int signaturelen, +key_verify(const Key *key, const u_char *signature, u_int signaturelen, const u_char *data, u_int datalen) { - if (signaturelen == 0) - return -1; + int r; - switch (key->type) { - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - case KEY_DSA: - return ssh_dss_verify(key, signature, signaturelen, data, datalen); -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - case KEY_ECDSA: - return ssh_ecdsa_verify(key, signature, signaturelen, data, datalen); -#endif - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_RSA: - return ssh_rsa_verify(key, signature, signaturelen, data, datalen); - default: - error("key_verify: invalid key type %d", key->type); - return -1; + if ((r = sshkey_verify(key, signature, signaturelen, + data, datalen, datafellows)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); + return r == SSH_ERR_SIGNATURE_INVALID ? 0 : -1; } + return 1; } -/* Converts a private to a public key */ Key * key_demote(const Key *k) { - Key *pk; + int r; + Key *ret = NULL; - pk = xcalloc(1, sizeof(*pk)); - pk->type = k->type; - pk->flags = k->flags; - pk->ecdsa_nid = k->ecdsa_nid; - pk->dsa = NULL; - pk->ecdsa = NULL; - pk->rsa = NULL; - - switch (k->type) { - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - key_cert_copy(k, pk); - /* FALLTHROUGH */ - case KEY_RSA1: - case KEY_RSA: - if ((pk->rsa = RSA_new()) == NULL) - fatal("key_demote: RSA_new failed"); - if ((pk->rsa->e = BN_dup(k->rsa->e)) == NULL) - fatal("key_demote: BN_dup failed"); - if ((pk->rsa->n = BN_dup(k->rsa->n)) == NULL) - fatal("key_demote: BN_dup failed"); - break; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - key_cert_copy(k, pk); - /* FALLTHROUGH */ - case KEY_DSA: - if ((pk->dsa = DSA_new()) == NULL) - fatal("key_demote: DSA_new failed"); - if ((pk->dsa->p = BN_dup(k->dsa->p)) == NULL) - fatal("key_demote: BN_dup failed"); - if ((pk->dsa->q = BN_dup(k->dsa->q)) == NULL) - fatal("key_demote: BN_dup failed"); - if ((pk->dsa->g = BN_dup(k->dsa->g)) == NULL) - fatal("key_demote: BN_dup failed"); - if ((pk->dsa->pub_key = BN_dup(k->dsa->pub_key)) == NULL) - fatal("key_demote: BN_dup failed"); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - key_cert_copy(k, pk); - /* FALLTHROUGH */ - case KEY_ECDSA: - if ((pk->ecdsa = EC_KEY_new_by_curve_name(pk->ecdsa_nid)) == NULL) - fatal("key_demote: EC_KEY_new_by_curve_name failed"); - if (EC_KEY_set_public_key(pk->ecdsa, - EC_KEY_get0_public_key(k->ecdsa)) != 1) - fatal("key_demote: EC_KEY_set_public_key failed"); - break; -#endif - default: - fatal("key_free: bad key type %d", k->type); - break; - } - - return (pk); + if ((r = sshkey_demote(k, &ret)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return ret; } int -key_is_cert(const Key *k) +key_to_certified(Key *k) { - if (k == NULL) - return 0; - switch (k->type) { - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_DSA_CERT: - case KEY_ECDSA_CERT: - return 1; - default: - return 0; - } -} + int r; -/* Return the cert-less equivalent to a certified key type */ -int -key_type_plain(int type) -{ - switch (type) { - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - return KEY_RSA; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - return KEY_DSA; - case KEY_ECDSA_CERT: - return KEY_ECDSA; - default: - return type; - } -} - -/* Convert a KEY_RSA or KEY_DSA to their _CERT equivalent */ -int -key_to_certified(Key *k, int legacy) -{ - switch (k->type) { - case KEY_RSA: - k->cert = cert_new(); - k->type = legacy ? KEY_RSA_CERT_V00 : KEY_RSA_CERT; - return 0; - case KEY_DSA: - k->cert = cert_new(); - k->type = legacy ? KEY_DSA_CERT_V00 : KEY_DSA_CERT; - return 0; - case KEY_ECDSA: - if (legacy) - fatal("%s: legacy ECDSA certificates are not supported", - __func__); - k->cert = cert_new(); - k->type = KEY_ECDSA_CERT; - return 0; - default: - error("%s: key has incorrect type %s", __func__, key_type(k)); + if ((r = sshkey_to_certified(k)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); return -1; } + return 0; } -/* Convert a KEY_RSA_CERT or KEY_DSA_CERT to their raw key equivalent */ int key_drop_cert(Key *k) { - switch (k->type) { - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - cert_free(k->cert); - k->type = KEY_RSA; - return 0; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - cert_free(k->cert); - k->type = KEY_DSA; - return 0; - case KEY_ECDSA_CERT: - cert_free(k->cert); - k->type = KEY_ECDSA; - return 0; - default: - error("%s: key has incorrect type %s", __func__, key_type(k)); + int r; + + if ((r = sshkey_drop_cert(k)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); return -1; } + return 0; } -/* - * Sign a KEY_RSA_CERT, KEY_DSA_CERT or KEY_ECDSA_CERT, (re-)generating - * the signed certblob - */ int key_certify(Key *k, Key *ca) { - Buffer principals; - u_char *ca_blob, *sig_blob, nonce[32]; - u_int i, ca_len, sig_len; + int r; - if (k->cert == NULL) { - error("%s: key lacks cert info", __func__); + if ((r = sshkey_certify(k, ca)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); return -1; } - - if (!key_is_cert(k)) { - error("%s: certificate has unknown type %d", __func__, - k->cert->type); - return -1; - } - - if (ca->type != KEY_RSA && ca->type != KEY_DSA && - ca->type != KEY_ECDSA) { - error("%s: CA key has unsupported type %s", __func__, - key_type(ca)); - return -1; - } - - key_to_blob(ca, &ca_blob, &ca_len); - - buffer_clear(&k->cert->certblob); - buffer_put_cstring(&k->cert->certblob, key_ssh_name(k)); - - /* -v01 certs put nonce first */ - arc4random_buf(&nonce, sizeof(nonce)); - if (!key_cert_is_legacy(k)) - buffer_put_string(&k->cert->certblob, nonce, sizeof(nonce)); - - switch (k->type) { - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - buffer_put_bignum2(&k->cert->certblob, k->dsa->p); - buffer_put_bignum2(&k->cert->certblob, k->dsa->q); - buffer_put_bignum2(&k->cert->certblob, k->dsa->g); - buffer_put_bignum2(&k->cert->certblob, k->dsa->pub_key); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA_CERT: - buffer_put_cstring(&k->cert->certblob, - key_curve_nid_to_name(k->ecdsa_nid)); - buffer_put_ecpoint(&k->cert->certblob, - EC_KEY_get0_group(k->ecdsa), - EC_KEY_get0_public_key(k->ecdsa)); - break; -#endif - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - buffer_put_bignum2(&k->cert->certblob, k->rsa->e); - buffer_put_bignum2(&k->cert->certblob, k->rsa->n); - break; - default: - error("%s: key has incorrect type %s", __func__, key_type(k)); - buffer_clear(&k->cert->certblob); - xfree(ca_blob); - return -1; - } - - /* -v01 certs have a serial number next */ - if (!key_cert_is_legacy(k)) - buffer_put_int64(&k->cert->certblob, k->cert->serial); - - buffer_put_int(&k->cert->certblob, k->cert->type); - buffer_put_cstring(&k->cert->certblob, k->cert->key_id); - - buffer_init(&principals); - for (i = 0; i < k->cert->nprincipals; i++) - buffer_put_cstring(&principals, k->cert->principals[i]); - buffer_put_string(&k->cert->certblob, buffer_ptr(&principals), - buffer_len(&principals)); - buffer_free(&principals); - - buffer_put_int64(&k->cert->certblob, k->cert->valid_after); - buffer_put_int64(&k->cert->certblob, k->cert->valid_before); - buffer_put_string(&k->cert->certblob, - buffer_ptr(&k->cert->critical), buffer_len(&k->cert->critical)); - - /* -v01 certs have non-critical options here */ - if (!key_cert_is_legacy(k)) { - buffer_put_string(&k->cert->certblob, - buffer_ptr(&k->cert->extensions), - buffer_len(&k->cert->extensions)); - } - - /* -v00 certs put the nonce at the end */ - if (key_cert_is_legacy(k)) - buffer_put_string(&k->cert->certblob, nonce, sizeof(nonce)); - - buffer_put_string(&k->cert->certblob, NULL, 0); /* reserved */ - buffer_put_string(&k->cert->certblob, ca_blob, ca_len); - xfree(ca_blob); - - /* Sign the whole mess */ - if (key_sign(ca, &sig_blob, &sig_len, buffer_ptr(&k->cert->certblob), - buffer_len(&k->cert->certblob)) != 0) { - error("%s: signature operation failed", __func__); - buffer_clear(&k->cert->certblob); - return -1; - } - /* Append signature and we are done */ - buffer_put_string(&k->cert->certblob, sig_blob, sig_len); - xfree(sig_blob); - return 0; } @@ -1979,300 +232,201 @@ int key_cert_check_authority(const Key *k, int want_host, int require_principal, const char *name, const char **reason) { - u_int i, principal_matches; - time_t now = time(NULL); + int r; - if (want_host) { - if (k->cert->type != SSH2_CERT_TYPE_HOST) { - *reason = "Certificate invalid: not a host certificate"; - return -1; - } - } else { - if (k->cert->type != SSH2_CERT_TYPE_USER) { - *reason = "Certificate invalid: not a user certificate"; - return -1; - } - } - if (now < 0) { - error("%s: system clock lies before epoch", __func__); - *reason = "Certificate invalid: not yet valid"; + if ((r = sshkey_cert_check_authority(k, want_host, require_principal, + name, reason)) != 0) { + fatal_on_fatal_errors(r, __func__, 0); + error("%s: %s", __func__, ssh_err(r)); return -1; } - if ((u_int64_t)now < k->cert->valid_after) { - *reason = "Certificate invalid: not yet valid"; + return 0; +} + +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) +int +key_ec_validate_public(const EC_GROUP *group, const EC_POINT *public) +{ + int r; + + if ((r = sshkey_ec_validate_public(group, public)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + error("%s: %s", __func__, ssh_err(r)); return -1; } - if ((u_int64_t)now >= k->cert->valid_before) { - *reason = "Certificate invalid: expired"; - return -1; - } - if (k->cert->nprincipals == 0) { - if (require_principal) { - *reason = "Certificate lacks principal list"; - return -1; - } - } else if (name != NULL) { - principal_matches = 0; - for (i = 0; i < k->cert->nprincipals; i++) { - if (strcmp(name, k->cert->principals[i]) == 0) { - principal_matches = 1; - break; - } - } - if (!principal_matches) { - *reason = "Certificate invalid: name is not a listed " - "principal"; - return -1; - } - } return 0; } -int -key_cert_is_legacy(Key *k) -{ - switch (k->type) { - case KEY_DSA_CERT_V00: - case KEY_RSA_CERT_V00: - return 1; - default: - return 0; - } -} - -/* XXX: these are really begging for a table-driven approach */ -int -key_curve_name_to_nid(const char *name) -{ -#ifdef OPENSSL_HAS_ECC - if (strcmp(name, "nistp256") == 0) - return NID_X9_62_prime256v1; - else if (strcmp(name, "nistp384") == 0) - return NID_secp384r1; - else if (strcmp(name, "nistp521") == 0) - return NID_secp521r1; -#endif - - debug("%s: unsupported EC curve name \"%.100s\"", __func__, name); - return -1; -} - -u_int -key_curve_nid_to_bits(int nid) -{ - switch (nid) { -#ifdef OPENSSL_HAS_ECC - case NID_X9_62_prime256v1: - return 256; - case NID_secp384r1: - return 384; - case NID_secp521r1: - return 521; -#endif - default: - error("%s: unsupported EC curve nid %d", __func__, nid); - return 0; - } -} - -const char * -key_curve_nid_to_name(int nid) -{ -#ifdef OPENSSL_HAS_ECC - if (nid == NID_X9_62_prime256v1) - return "nistp256"; - else if (nid == NID_secp384r1) - return "nistp384"; - else if (nid == NID_secp521r1) - return "nistp521"; -#endif - error("%s: unsupported EC curve nid %d", __func__, nid); - return NULL; -} - -#ifdef OPENSSL_HAS_ECC -const EVP_MD * -key_ec_nid_to_evpmd(int nid) -{ - int kbits = key_curve_nid_to_bits(nid); - - if (kbits == 0) - fatal("%s: invalid nid %d", __func__, nid); - /* RFC5656 section 6.2.1 */ - if (kbits <= 256) - return EVP_sha256(); - else if (kbits <= 384) - return EVP_sha384(); - else - return EVP_sha512(); -} - -int -key_ec_validate_public(const EC_GROUP *group, const EC_POINT *public) -{ - BN_CTX *bnctx; - EC_POINT *nq = NULL; - BIGNUM *order, *x, *y, *tmp; - int ret = -1; - - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - BN_CTX_start(bnctx); - - /* - * We shouldn't ever hit this case because bignum_get_ecpoint() - * refuses to load GF2m points. - */ - if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != - NID_X9_62_prime_field) { - error("%s: group is not a prime field", __func__); - goto out; - } - - /* Q != infinity */ - if (EC_POINT_is_at_infinity(group, public)) { - error("%s: received degenerate public key (infinity)", - __func__); - goto out; - } - - if ((x = BN_CTX_get(bnctx)) == NULL || - (y = BN_CTX_get(bnctx)) == NULL || - (order = BN_CTX_get(bnctx)) == NULL || - (tmp = BN_CTX_get(bnctx)) == NULL) - fatal("%s: BN_CTX_get failed", __func__); - - /* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */ - if (EC_GROUP_get_order(group, order, bnctx) != 1) - fatal("%s: EC_GROUP_get_order failed", __func__); - if (EC_POINT_get_affine_coordinates_GFp(group, public, - x, y, bnctx) != 1) - fatal("%s: EC_POINT_get_affine_coordinates_GFp", __func__); - if (BN_num_bits(x) <= BN_num_bits(order) / 2) { - error("%s: public key x coordinate too small: " - "bits(x) = %d, bits(order)/2 = %d", __func__, - BN_num_bits(x), BN_num_bits(order) / 2); - goto out; - } - if (BN_num_bits(y) <= BN_num_bits(order) / 2) { - error("%s: public key y coordinate too small: " - "bits(y) = %d, bits(order)/2 = %d", __func__, - BN_num_bits(x), BN_num_bits(order) / 2); - goto out; - } - - /* nQ == infinity (n == order of subgroup) */ - if ((nq = EC_POINT_new(group)) == NULL) - fatal("%s: BN_CTX_tmp failed", __func__); - if (EC_POINT_mul(group, nq, NULL, public, order, bnctx) != 1) - fatal("%s: EC_GROUP_mul failed", __func__); - if (EC_POINT_is_at_infinity(group, nq) != 1) { - error("%s: received degenerate public key (nQ != infinity)", - __func__); - goto out; - } - - /* x < order - 1, y < order - 1 */ - if (!BN_sub(tmp, order, BN_value_one())) - fatal("%s: BN_sub failed", __func__); - if (BN_cmp(x, tmp) >= 0) { - error("%s: public key x coordinate >= group order - 1", - __func__); - goto out; - } - if (BN_cmp(y, tmp) >= 0) { - error("%s: public key y coordinate >= group order - 1", - __func__); - goto out; - } - ret = 0; - out: - BN_CTX_free(bnctx); - EC_POINT_free(nq); - return ret; -} - int key_ec_validate_private(const EC_KEY *key) { - BN_CTX *bnctx; - BIGNUM *order, *tmp; - int ret = -1; + int r; - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - BN_CTX_start(bnctx); - - if ((order = BN_CTX_get(bnctx)) == NULL || - (tmp = BN_CTX_get(bnctx)) == NULL) - fatal("%s: BN_CTX_get failed", __func__); - - /* log2(private) > log2(order)/2 */ - if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, bnctx) != 1) - fatal("%s: EC_GROUP_get_order failed", __func__); - if (BN_num_bits(EC_KEY_get0_private_key(key)) <= - BN_num_bits(order) / 2) { - error("%s: private key too small: " - "bits(y) = %d, bits(order)/2 = %d", __func__, - BN_num_bits(EC_KEY_get0_private_key(key)), - BN_num_bits(order) / 2); - goto out; + if ((r = sshkey_ec_validate_private(key)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + error("%s: %s", __func__, ssh_err(r)); + return -1; } + return 0; +} +#endif /* WITH_OPENSSL */ - /* private < order - 1 */ - if (!BN_sub(tmp, order, BN_value_one())) - fatal("%s: BN_sub failed", __func__); - if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0) { - error("%s: private key >= group order - 1", __func__); - goto out; +void +key_private_serialize(const Key *key, struct sshbuf *b) +{ + int r; + + if ((r = sshkey_private_serialize(key, b)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +Key * +key_private_deserialize(struct sshbuf *blob) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_private_deserialize(blob, &ret)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + error("%s: %s", __func__, ssh_err(r)); + return NULL; } - ret = 0; - out: - BN_CTX_free(bnctx); return ret; } -#if defined(DEBUG_KEXECDH) || defined(DEBUG_PK) -void -key_dump_ec_point(const EC_GROUP *group, const EC_POINT *point) -{ - BIGNUM *x, *y; - BN_CTX *bnctx; +/* authfile.c */ - if (point == NULL) { - fputs("point=(NULL)\n", stderr); - return; +int +key_save_private(Key *key, const char *filename, const char *passphrase, + const char *comment, int force_new_format, const char *new_format_cipher, + int new_format_rounds) +{ + int r; + + if ((r = sshkey_save_private(key, filename, passphrase, comment, + force_new_format, new_format_cipher, new_format_rounds)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + error("%s: %s", __func__, ssh_err(r)); + return 0; } - if ((bnctx = BN_CTX_new()) == NULL) - fatal("%s: BN_CTX_new failed", __func__); - BN_CTX_start(bnctx); - if ((x = BN_CTX_get(bnctx)) == NULL || (y = BN_CTX_get(bnctx)) == NULL) - fatal("%s: BN_CTX_get failed", __func__); - if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != - NID_X9_62_prime_field) - fatal("%s: group is not a prime field", __func__); - if (EC_POINT_get_affine_coordinates_GFp(group, point, x, y, bnctx) != 1) - fatal("%s: EC_POINT_get_affine_coordinates_GFp", __func__); - fputs("x=", stderr); - BN_print_fp(stderr, x); - fputs("\ny=", stderr); - BN_print_fp(stderr, y); - fputs("\n", stderr); - BN_CTX_free(bnctx); + return 1; } -void -key_dump_ec_key(const EC_KEY *key) +int +key_load_file(int fd, const char *filename, struct sshbuf *blob) { - const BIGNUM *exponent; + int r; - key_dump_ec_point(EC_KEY_get0_group(key), EC_KEY_get0_public_key(key)); - fputs("exponent=", stderr); - if ((exponent = EC_KEY_get0_private_key(key)) == NULL) - fputs("(NULL)", stderr); - else - BN_print_fp(stderr, EC_KEY_get0_private_key(key)); - fputs("\n", stderr); + if ((r = sshkey_load_file(fd, blob)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + error("%s: %s", __func__, ssh_err(r)); + return 0; + } + return 1; } -#endif /* defined(DEBUG_KEXECDH) || defined(DEBUG_PK) */ -#endif /* OPENSSL_HAS_ECC */ + +Key * +key_load_cert(const char *filename) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_load_cert(filename, &ret)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + /* Old authfile.c ignored all file errors. */ + if (r == SSH_ERR_SYSTEM_ERROR) + debug("%s: %s", __func__, ssh_err(r)); + else + error("%s: %s", __func__, ssh_err(r)); + return NULL; + } + return ret; + +} + +Key * +key_load_public(const char *filename, char **commentp) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_load_public(filename, &ret, commentp)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + /* Old authfile.c ignored all file errors. */ + if (r == SSH_ERR_SYSTEM_ERROR) + debug("%s: %s", __func__, ssh_err(r)); + else + error("%s: %s", __func__, ssh_err(r)); + return NULL; + } + return ret; +} + +Key * +key_load_private(const char *path, const char *passphrase, + char **commentp) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_load_private(path, passphrase, &ret, commentp)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + /* Old authfile.c ignored all file errors. */ + if (r == SSH_ERR_SYSTEM_ERROR || + r == SSH_ERR_KEY_WRONG_PASSPHRASE) + debug("%s: %s", __func__, ssh_err(r)); + else + error("%s: %s", __func__, ssh_err(r)); + return NULL; + } + return ret; +} + +Key * +key_load_private_cert(int type, const char *filename, const char *passphrase, + int *perm_ok) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_load_private_cert(type, filename, passphrase, + &ret, perm_ok)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + /* Old authfile.c ignored all file errors. */ + if (r == SSH_ERR_SYSTEM_ERROR || + r == SSH_ERR_KEY_WRONG_PASSPHRASE) + debug("%s: %s", __func__, ssh_err(r)); + else + error("%s: %s", __func__, ssh_err(r)); + return NULL; + } + return ret; +} + +Key * +key_load_private_type(int type, const char *filename, const char *passphrase, + char **commentp, int *perm_ok) +{ + int r; + Key *ret = NULL; + + if ((r = sshkey_load_private_type(type, filename, passphrase, + &ret, commentp, perm_ok)) != 0) { + fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR); + /* Old authfile.c ignored all file errors. */ + if (r == SSH_ERR_SYSTEM_ERROR || + (r == SSH_ERR_KEY_WRONG_PASSPHRASE)) + debug("%s: %s", __func__, ssh_err(r)); + else + error("%s: %s", __func__, ssh_err(r)); + return NULL; + } + return ret; +} + +int +key_perm_ok(int fd, const char *filename) +{ + return sshkey_perm_ok(fd, filename) == 0 ? 1 : 0; +} + diff --git a/key.h b/key.h index ec5ac5e..903bdf6 100644 --- a/key.h +++ b/key.h @@ -1,4 +1,4 @@ -/* $OpenBSD: key.h,v 1.33 2010/10/28 11:22:09 djm Exp $ */ +/* $OpenBSD: key.h,v 1.48 2015/07/03 03:43:18 djm Exp $ */ /* * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. @@ -26,126 +26,79 @@ #ifndef KEY_H #define KEY_H -#include "buffer.h" -#include -#include -#ifdef OPENSSL_HAS_ECC -#include +#include "sshkey.h" + +typedef struct sshkey Key; + +#define types sshkey_types +#define fp_type sshkey_fp_type +#define fp_rep sshkey_fp_rep + +#ifndef SSH_KEY_NO_DEFINE +#define key_new sshkey_new +#define key_free sshkey_free +#define key_equal_public sshkey_equal_public +#define key_equal sshkey_equal +#define key_type sshkey_type +#define key_cert_type sshkey_cert_type +#define key_ssh_name sshkey_ssh_name +#define key_ssh_name_plain sshkey_ssh_name_plain +#define key_type_from_name sshkey_type_from_name +#define key_ecdsa_nid_from_name sshkey_ecdsa_nid_from_name +#define key_type_is_cert sshkey_type_is_cert +#define key_size sshkey_size +#define key_ecdsa_bits_to_nid sshkey_ecdsa_bits_to_nid +#define key_ecdsa_key_to_nid sshkey_ecdsa_key_to_nid +#define key_is_cert sshkey_is_cert +#define key_type_plain sshkey_type_plain +#define key_curve_name_to_nid sshkey_curve_name_to_nid +#define key_curve_nid_to_bits sshkey_curve_nid_to_bits +#define key_curve_nid_to_name sshkey_curve_nid_to_name +#define key_ec_nid_to_hash_alg sshkey_ec_nid_to_hash_alg +#define key_dump_ec_point sshkey_dump_ec_point +#define key_dump_ec_key sshkey_dump_ec_key #endif -typedef struct Key Key; -enum types { - KEY_RSA1, - KEY_RSA, - KEY_DSA, - KEY_ECDSA, - KEY_RSA_CERT, - KEY_DSA_CERT, - KEY_ECDSA_CERT, - KEY_RSA_CERT_V00, - KEY_DSA_CERT_V00, - KEY_UNSPEC -}; -enum fp_type { - SSH_FP_SHA1, - SSH_FP_MD5 -}; -enum fp_rep { - SSH_FP_HEX, - SSH_FP_BUBBLEBABBLE, - SSH_FP_RANDOMART -}; - -/* key is stored in external hardware */ -#define KEY_FLAG_EXT 0x0001 - -#define CERT_MAX_PRINCIPALS 256 -struct KeyCert { - Buffer certblob; /* Kept around for use on wire */ - u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */ - u_int64_t serial; - char *key_id; - u_int nprincipals; - char **principals; - u_int64_t valid_after, valid_before; - Buffer critical; - Buffer extensions; - Key *signature_key; -}; - -struct Key { - int type; - int flags; - RSA *rsa; - DSA *dsa; - int ecdsa_nid; /* NID of curve */ -#ifdef OPENSSL_HAS_ECC - EC_KEY *ecdsa; -#else - void *ecdsa; -#endif - struct KeyCert *cert; -}; - -Key *key_new(int); -void key_add_private(Key *); -Key *key_new_private(int); -void key_free(Key *); -Key *key_demote(const Key *); -int key_equal_public(const Key *, const Key *); -int key_equal(const Key *, const Key *); -char *key_fingerprint(Key *, enum fp_type, enum fp_rep); -u_char *key_fingerprint_raw(Key *, enum fp_type, u_int *); -const char *key_type(const Key *); -const char *key_cert_type(const Key *); -int key_write(const Key *, FILE *); -int key_read(Key *, char **); -u_int key_size(const Key *); +void key_add_private(Key *); +Key *key_new_private(int); +void key_free(Key *); +Key *key_demote(const Key *); +int key_write(const Key *, FILE *); +int key_read(Key *, char **); Key *key_generate(int, u_int); Key *key_from_private(const Key *); -int key_type_from_name(char *); -int key_is_cert(const Key *); -int key_type_plain(int); -int key_to_certified(Key *, int); +int key_to_certified(Key *); int key_drop_cert(Key *); int key_certify(Key *, Key *); -void key_cert_copy(const Key *, struct Key *); +void key_cert_copy(const Key *, Key *); int key_cert_check_authority(const Key *, int, int, const char *, const char **); -int key_cert_is_legacy(Key *); +char *key_alg_list(int, int); -int key_ecdsa_nid_from_name(const char *); -int key_curve_name_to_nid(const char *); -const char * key_curve_nid_to_name(int); -u_int key_curve_nid_to_bits(int); -int key_ecdsa_bits_to_nid(int); -#ifdef OPENSSL_HAS_ECC -int key_ecdsa_key_to_nid(EC_KEY *); -const EVP_MD * key_ec_nid_to_evpmd(int nid); -int key_ec_validate_public(const EC_GROUP *, const EC_POINT *); -int key_ec_validate_private(const EC_KEY *); -#endif +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) +int key_ec_validate_public(const EC_GROUP *, const EC_POINT *); +int key_ec_validate_private(const EC_KEY *); +#endif /* defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) */ -Key *key_from_blob(const u_char *, u_int); -int key_to_blob(const Key *, u_char **, u_int *); -const char *key_ssh_name(const Key *); -const char *key_ssh_name_plain(const Key *); -int key_names_valid2(const char *); +Key *key_from_blob(const u_char *, u_int); +int key_to_blob(const Key *, u_char **, u_int *); int key_sign(const Key *, u_char **, u_int *, const u_char *, u_int); int key_verify(const Key *, const u_char *, u_int, const u_char *, u_int); -int ssh_dss_sign(const Key *, u_char **, u_int *, const u_char *, u_int); -int ssh_dss_verify(const Key *, const u_char *, u_int, const u_char *, u_int); -int ssh_ecdsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int); -int ssh_ecdsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int); -int ssh_rsa_sign(const Key *, u_char **, u_int *, const u_char *, u_int); -int ssh_rsa_verify(const Key *, const u_char *, u_int, const u_char *, u_int); +void key_private_serialize(const Key *, struct sshbuf *); +Key *key_private_deserialize(struct sshbuf *); -#if defined(OPENSSL_HAS_ECC) && (defined(DEBUG_KEXECDH) || defined(DEBUG_PK)) -void key_dump_ec_point(const EC_GROUP *, const EC_POINT *); -void key_dump_ec_key(const EC_KEY *); -#endif +/* authfile.c */ +int key_save_private(Key *, const char *, const char *, const char *, + int, const char *, int); +int key_load_file(int, const char *, struct sshbuf *); +Key *key_load_cert(const char *); +Key *key_load_public(const char *, char **); +Key *key_load_private(const char *, const char *, char **); +Key *key_load_private_cert(int, const char *, const char *, int *); +Key *key_load_private_type(int, const char *, const char *, char **, int *); +int key_perm_ok(int, const char *); #endif diff --git a/krl.c b/krl.c new file mode 100644 index 0000000..4075df8 --- /dev/null +++ b/krl.c @@ -0,0 +1,1303 @@ +/* + * Copyright (c) 2012 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* $OpenBSD: krl.c,v 1.33 2015/07/03 03:43:18 djm Exp $ */ + +#include "includes.h" + +#include /* MIN */ +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "sshbuf.h" +#include "ssherr.h" +#include "sshkey.h" +#include "authfile.h" +#include "misc.h" +#include "log.h" +#include "digest.h" +#include "bitmap.h" + +#include "krl.h" + +/* #define DEBUG_KRL */ +#ifdef DEBUG_KRL +# define KRL_DBG(x) debug3 x +#else +# define KRL_DBG(x) +#endif + +/* + * Trees of revoked serial numbers, key IDs and keys. This allows + * quick searching, querying and producing lists in canonical order. + */ + +/* Tree of serial numbers. XXX make smarter: really need a real sparse bitmap */ +struct revoked_serial { + u_int64_t lo, hi; + RB_ENTRY(revoked_serial) tree_entry; +}; +static int serial_cmp(struct revoked_serial *a, struct revoked_serial *b); +RB_HEAD(revoked_serial_tree, revoked_serial); +RB_GENERATE_STATIC(revoked_serial_tree, revoked_serial, tree_entry, serial_cmp); + +/* Tree of key IDs */ +struct revoked_key_id { + char *key_id; + RB_ENTRY(revoked_key_id) tree_entry; +}; +static int key_id_cmp(struct revoked_key_id *a, struct revoked_key_id *b); +RB_HEAD(revoked_key_id_tree, revoked_key_id); +RB_GENERATE_STATIC(revoked_key_id_tree, revoked_key_id, tree_entry, key_id_cmp); + +/* Tree of blobs (used for keys and fingerprints) */ +struct revoked_blob { + u_char *blob; + size_t len; + RB_ENTRY(revoked_blob) tree_entry; +}; +static int blob_cmp(struct revoked_blob *a, struct revoked_blob *b); +RB_HEAD(revoked_blob_tree, revoked_blob); +RB_GENERATE_STATIC(revoked_blob_tree, revoked_blob, tree_entry, blob_cmp); + +/* Tracks revoked certs for a single CA */ +struct revoked_certs { + struct sshkey *ca_key; + struct revoked_serial_tree revoked_serials; + struct revoked_key_id_tree revoked_key_ids; + TAILQ_ENTRY(revoked_certs) entry; +}; +TAILQ_HEAD(revoked_certs_list, revoked_certs); + +struct ssh_krl { + u_int64_t krl_version; + u_int64_t generated_date; + u_int64_t flags; + char *comment; + struct revoked_blob_tree revoked_keys; + struct revoked_blob_tree revoked_sha1s; + struct revoked_certs_list revoked_certs; +}; + +/* Return equal if a and b overlap */ +static int +serial_cmp(struct revoked_serial *a, struct revoked_serial *b) +{ + if (a->hi >= b->lo && a->lo <= b->hi) + return 0; + return a->lo < b->lo ? -1 : 1; +} + +static int +key_id_cmp(struct revoked_key_id *a, struct revoked_key_id *b) +{ + return strcmp(a->key_id, b->key_id); +} + +static int +blob_cmp(struct revoked_blob *a, struct revoked_blob *b) +{ + int r; + + if (a->len != b->len) { + if ((r = memcmp(a->blob, b->blob, MIN(a->len, b->len))) != 0) + return r; + return a->len > b->len ? 1 : -1; + } else + return memcmp(a->blob, b->blob, a->len); +} + +struct ssh_krl * +ssh_krl_init(void) +{ + struct ssh_krl *krl; + + if ((krl = calloc(1, sizeof(*krl))) == NULL) + return NULL; + RB_INIT(&krl->revoked_keys); + RB_INIT(&krl->revoked_sha1s); + TAILQ_INIT(&krl->revoked_certs); + return krl; +} + +static void +revoked_certs_free(struct revoked_certs *rc) +{ + struct revoked_serial *rs, *trs; + struct revoked_key_id *rki, *trki; + + RB_FOREACH_SAFE(rs, revoked_serial_tree, &rc->revoked_serials, trs) { + RB_REMOVE(revoked_serial_tree, &rc->revoked_serials, rs); + free(rs); + } + RB_FOREACH_SAFE(rki, revoked_key_id_tree, &rc->revoked_key_ids, trki) { + RB_REMOVE(revoked_key_id_tree, &rc->revoked_key_ids, rki); + free(rki->key_id); + free(rki); + } + sshkey_free(rc->ca_key); +} + +void +ssh_krl_free(struct ssh_krl *krl) +{ + struct revoked_blob *rb, *trb; + struct revoked_certs *rc, *trc; + + if (krl == NULL) + return; + + free(krl->comment); + RB_FOREACH_SAFE(rb, revoked_blob_tree, &krl->revoked_keys, trb) { + RB_REMOVE(revoked_blob_tree, &krl->revoked_keys, rb); + free(rb->blob); + free(rb); + } + RB_FOREACH_SAFE(rb, revoked_blob_tree, &krl->revoked_sha1s, trb) { + RB_REMOVE(revoked_blob_tree, &krl->revoked_sha1s, rb); + free(rb->blob); + free(rb); + } + TAILQ_FOREACH_SAFE(rc, &krl->revoked_certs, entry, trc) { + TAILQ_REMOVE(&krl->revoked_certs, rc, entry); + revoked_certs_free(rc); + } +} + +void +ssh_krl_set_version(struct ssh_krl *krl, u_int64_t version) +{ + krl->krl_version = version; +} + +int +ssh_krl_set_comment(struct ssh_krl *krl, const char *comment) +{ + free(krl->comment); + if ((krl->comment = strdup(comment)) == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; +} + +/* + * Find the revoked_certs struct for a CA key. If allow_create is set then + * create a new one in the tree if one did not exist already. + */ +static int +revoked_certs_for_ca_key(struct ssh_krl *krl, const struct sshkey *ca_key, + struct revoked_certs **rcp, int allow_create) +{ + struct revoked_certs *rc; + int r; + + *rcp = NULL; + TAILQ_FOREACH(rc, &krl->revoked_certs, entry) { + if ((ca_key == NULL && rc->ca_key == NULL) || + sshkey_equal(rc->ca_key, ca_key)) { + *rcp = rc; + return 0; + } + } + if (!allow_create) + return 0; + /* If this CA doesn't exist in the list then add it now */ + if ((rc = calloc(1, sizeof(*rc))) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (ca_key == NULL) + rc->ca_key = NULL; + else if ((r = sshkey_from_private(ca_key, &rc->ca_key)) != 0) { + free(rc); + return r; + } + RB_INIT(&rc->revoked_serials); + RB_INIT(&rc->revoked_key_ids); + TAILQ_INSERT_TAIL(&krl->revoked_certs, rc, entry); + KRL_DBG(("%s: new CA %s", __func__, + ca_key == NULL ? "*" : sshkey_type(ca_key))); + *rcp = rc; + return 0; +} + +static int +insert_serial_range(struct revoked_serial_tree *rt, u_int64_t lo, u_int64_t hi) +{ + struct revoked_serial rs, *ers, *crs, *irs; + + KRL_DBG(("%s: insert %llu:%llu", __func__, lo, hi)); + memset(&rs, 0, sizeof(rs)); + rs.lo = lo; + rs.hi = hi; + ers = RB_NFIND(revoked_serial_tree, rt, &rs); + if (ers == NULL || serial_cmp(ers, &rs) != 0) { + /* No entry matches. Just insert */ + if ((irs = malloc(sizeof(rs))) == NULL) + return SSH_ERR_ALLOC_FAIL; + memcpy(irs, &rs, sizeof(*irs)); + ers = RB_INSERT(revoked_serial_tree, rt, irs); + if (ers != NULL) { + KRL_DBG(("%s: bad: ers != NULL", __func__)); + /* Shouldn't happen */ + free(irs); + return SSH_ERR_INTERNAL_ERROR; + } + ers = irs; + } else { + KRL_DBG(("%s: overlap found %llu:%llu", __func__, + ers->lo, ers->hi)); + /* + * The inserted entry overlaps an existing one. Grow the + * existing entry. + */ + if (ers->lo > lo) + ers->lo = lo; + if (ers->hi < hi) + ers->hi = hi; + } + + /* + * The inserted or revised range might overlap or abut adjacent ones; + * coalesce as necessary. + */ + + /* Check predecessors */ + while ((crs = RB_PREV(revoked_serial_tree, rt, ers)) != NULL) { + KRL_DBG(("%s: pred %llu:%llu", __func__, crs->lo, crs->hi)); + if (ers->lo != 0 && crs->hi < ers->lo - 1) + break; + /* This entry overlaps. */ + if (crs->lo < ers->lo) { + ers->lo = crs->lo; + KRL_DBG(("%s: pred extend %llu:%llu", __func__, + ers->lo, ers->hi)); + } + RB_REMOVE(revoked_serial_tree, rt, crs); + free(crs); + } + /* Check successors */ + while ((crs = RB_NEXT(revoked_serial_tree, rt, ers)) != NULL) { + KRL_DBG(("%s: succ %llu:%llu", __func__, crs->lo, crs->hi)); + if (ers->hi != (u_int64_t)-1 && crs->lo > ers->hi + 1) + break; + /* This entry overlaps. */ + if (crs->hi > ers->hi) { + ers->hi = crs->hi; + KRL_DBG(("%s: succ extend %llu:%llu", __func__, + ers->lo, ers->hi)); + } + RB_REMOVE(revoked_serial_tree, rt, crs); + free(crs); + } + KRL_DBG(("%s: done, final %llu:%llu", __func__, ers->lo, ers->hi)); + return 0; +} + +int +ssh_krl_revoke_cert_by_serial(struct ssh_krl *krl, const struct sshkey *ca_key, + u_int64_t serial) +{ + return ssh_krl_revoke_cert_by_serial_range(krl, ca_key, serial, serial); +} + +int +ssh_krl_revoke_cert_by_serial_range(struct ssh_krl *krl, + const struct sshkey *ca_key, u_int64_t lo, u_int64_t hi) +{ + struct revoked_certs *rc; + int r; + + if (lo > hi || lo == 0) + return SSH_ERR_INVALID_ARGUMENT; + if ((r = revoked_certs_for_ca_key(krl, ca_key, &rc, 1)) != 0) + return r; + return insert_serial_range(&rc->revoked_serials, lo, hi); +} + +int +ssh_krl_revoke_cert_by_key_id(struct ssh_krl *krl, const struct sshkey *ca_key, + const char *key_id) +{ + struct revoked_key_id *rki, *erki; + struct revoked_certs *rc; + int r; + + if ((r = revoked_certs_for_ca_key(krl, ca_key, &rc, 1)) != 0) + return r; + + KRL_DBG(("%s: revoke %s", __func__, key_id)); + if ((rki = calloc(1, sizeof(*rki))) == NULL || + (rki->key_id = strdup(key_id)) == NULL) { + free(rki); + return SSH_ERR_ALLOC_FAIL; + } + erki = RB_INSERT(revoked_key_id_tree, &rc->revoked_key_ids, rki); + if (erki != NULL) { + free(rki->key_id); + free(rki); + } + return 0; +} + +/* Convert "key" to a public key blob without any certificate information */ +static int +plain_key_blob(const struct sshkey *key, u_char **blob, size_t *blen) +{ + struct sshkey *kcopy; + int r; + + if ((r = sshkey_from_private(key, &kcopy)) != 0) + return r; + if (sshkey_is_cert(kcopy)) { + if ((r = sshkey_drop_cert(kcopy)) != 0) { + sshkey_free(kcopy); + return r; + } + } + r = sshkey_to_blob(kcopy, blob, blen); + sshkey_free(kcopy); + return r; +} + +/* Revoke a key blob. Ownership of blob is transferred to the tree */ +static int +revoke_blob(struct revoked_blob_tree *rbt, u_char *blob, size_t len) +{ + struct revoked_blob *rb, *erb; + + if ((rb = calloc(1, sizeof(*rb))) == NULL) + return SSH_ERR_ALLOC_FAIL; + rb->blob = blob; + rb->len = len; + erb = RB_INSERT(revoked_blob_tree, rbt, rb); + if (erb != NULL) { + free(rb->blob); + free(rb); + } + return 0; +} + +int +ssh_krl_revoke_key_explicit(struct ssh_krl *krl, const struct sshkey *key) +{ + u_char *blob; + size_t len; + int r; + + debug3("%s: revoke type %s", __func__, sshkey_type(key)); + if ((r = plain_key_blob(key, &blob, &len)) != 0) + return r; + return revoke_blob(&krl->revoked_keys, blob, len); +} + +int +ssh_krl_revoke_key_sha1(struct ssh_krl *krl, const struct sshkey *key) +{ + u_char *blob; + size_t len; + int r; + + debug3("%s: revoke type %s by sha1", __func__, sshkey_type(key)); + if ((r = sshkey_fingerprint_raw(key, SSH_DIGEST_SHA1, + &blob, &len)) != 0) + return r; + return revoke_blob(&krl->revoked_sha1s, blob, len); +} + +int +ssh_krl_revoke_key(struct ssh_krl *krl, const struct sshkey *key) +{ + if (!sshkey_is_cert(key)) + return ssh_krl_revoke_key_sha1(krl, key); + + if (key->cert->serial == 0) { + return ssh_krl_revoke_cert_by_key_id(krl, + key->cert->signature_key, + key->cert->key_id); + } else { + return ssh_krl_revoke_cert_by_serial(krl, + key->cert->signature_key, + key->cert->serial); + } +} + +/* + * Select the most compact section type to emit next in a KRL based on + * the current section type, the run length of contiguous revoked serial + * numbers and the gaps from the last and to the next revoked serial. + * Applies a mostly-accurate bit cost model to select the section type + * that will minimise the size of the resultant KRL. + */ +static int +choose_next_state(int current_state, u_int64_t contig, int final, + u_int64_t last_gap, u_int64_t next_gap, int *force_new_section) +{ + int new_state; + u_int64_t cost, cost_list, cost_range, cost_bitmap, cost_bitmap_restart; + + /* + * Avoid unsigned overflows. + * The limits are high enough to avoid confusing the calculations. + */ + contig = MIN(contig, 1ULL<<31); + last_gap = MIN(last_gap, 1ULL<<31); + next_gap = MIN(next_gap, 1ULL<<31); + + /* + * Calculate the cost to switch from the current state to candidates. + * NB. range sections only ever contain a single range, so their + * switching cost is independent of the current_state. + */ + cost_list = cost_bitmap = cost_bitmap_restart = 0; + cost_range = 8; + switch (current_state) { + case KRL_SECTION_CERT_SERIAL_LIST: + cost_bitmap_restart = cost_bitmap = 8 + 64; + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + cost_list = 8; + cost_bitmap_restart = 8 + 64; + break; + case KRL_SECTION_CERT_SERIAL_RANGE: + case 0: + cost_bitmap_restart = cost_bitmap = 8 + 64; + cost_list = 8; + } + + /* Estimate base cost in bits of each section type */ + cost_list += 64 * contig + (final ? 0 : 8+64); + cost_range += (2 * 64) + (final ? 0 : 8+64); + cost_bitmap += last_gap + contig + (final ? 0 : MIN(next_gap, 8+64)); + cost_bitmap_restart += contig + (final ? 0 : MIN(next_gap, 8+64)); + + /* Convert to byte costs for actual comparison */ + cost_list = (cost_list + 7) / 8; + cost_bitmap = (cost_bitmap + 7) / 8; + cost_bitmap_restart = (cost_bitmap_restart + 7) / 8; + cost_range = (cost_range + 7) / 8; + + /* Now pick the best choice */ + *force_new_section = 0; + new_state = KRL_SECTION_CERT_SERIAL_BITMAP; + cost = cost_bitmap; + if (cost_range < cost) { + new_state = KRL_SECTION_CERT_SERIAL_RANGE; + cost = cost_range; + } + if (cost_list < cost) { + new_state = KRL_SECTION_CERT_SERIAL_LIST; + cost = cost_list; + } + if (cost_bitmap_restart < cost) { + new_state = KRL_SECTION_CERT_SERIAL_BITMAP; + *force_new_section = 1; + cost = cost_bitmap_restart; + } + KRL_DBG(("%s: contig %llu last_gap %llu next_gap %llu final %d, costs:" + "list %llu range %llu bitmap %llu new bitmap %llu, " + "selected 0x%02x%s", __func__, (long long unsigned)contig, + (long long unsigned)last_gap, (long long unsigned)next_gap, final, + (long long unsigned)cost_list, (long long unsigned)cost_range, + (long long unsigned)cost_bitmap, + (long long unsigned)cost_bitmap_restart, new_state, + *force_new_section ? " restart" : "")); + return new_state; +} + +static int +put_bitmap(struct sshbuf *buf, struct bitmap *bitmap) +{ + size_t len; + u_char *blob; + int r; + + len = bitmap_nbytes(bitmap); + if ((blob = malloc(len)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (bitmap_to_string(bitmap, blob, len) != 0) { + free(blob); + return SSH_ERR_INTERNAL_ERROR; + } + r = sshbuf_put_bignum2_bytes(buf, blob, len); + free(blob); + return r; +} + +/* Generate a KRL_SECTION_CERTIFICATES KRL section */ +static int +revoked_certs_generate(struct revoked_certs *rc, struct sshbuf *buf) +{ + int final, force_new_sect, r = SSH_ERR_INTERNAL_ERROR; + u_int64_t i, contig, gap, last = 0, bitmap_start = 0; + struct revoked_serial *rs, *nrs; + struct revoked_key_id *rki; + int next_state, state = 0; + struct sshbuf *sect; + struct bitmap *bitmap = NULL; + + if ((sect = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + + /* Store the header: optional CA scope key, reserved */ + if (rc->ca_key == NULL) { + if ((r = sshbuf_put_string(buf, NULL, 0)) != 0) + goto out; + } else { + if ((r = sshkey_puts(rc->ca_key, buf)) != 0) + goto out; + } + if ((r = sshbuf_put_string(buf, NULL, 0)) != 0) + goto out; + + /* Store the revoked serials. */ + for (rs = RB_MIN(revoked_serial_tree, &rc->revoked_serials); + rs != NULL; + rs = RB_NEXT(revoked_serial_tree, &rc->revoked_serials, rs)) { + KRL_DBG(("%s: serial %llu:%llu state 0x%02x", __func__, + (long long unsigned)rs->lo, (long long unsigned)rs->hi, + state)); + + /* Check contiguous length and gap to next section (if any) */ + nrs = RB_NEXT(revoked_serial_tree, &rc->revoked_serials, rs); + final = nrs == NULL; + gap = nrs == NULL ? 0 : nrs->lo - rs->hi; + contig = 1 + (rs->hi - rs->lo); + + /* Choose next state based on these */ + next_state = choose_next_state(state, contig, final, + state == 0 ? 0 : rs->lo - last, gap, &force_new_sect); + + /* + * If the current section is a range section or has a different + * type to the next section, then finish it off now. + */ + if (state != 0 && (force_new_sect || next_state != state || + state == KRL_SECTION_CERT_SERIAL_RANGE)) { + KRL_DBG(("%s: finish state 0x%02x", __func__, state)); + switch (state) { + case KRL_SECTION_CERT_SERIAL_LIST: + case KRL_SECTION_CERT_SERIAL_RANGE: + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + if ((r = put_bitmap(sect, bitmap)) != 0) + goto out; + bitmap_free(bitmap); + bitmap = NULL; + break; + } + if ((r = sshbuf_put_u8(buf, state)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + sshbuf_reset(sect); + } + + /* If we are starting a new section then prepare it now */ + if (next_state != state || force_new_sect) { + KRL_DBG(("%s: start state 0x%02x", __func__, + next_state)); + state = next_state; + sshbuf_reset(sect); + switch (state) { + case KRL_SECTION_CERT_SERIAL_LIST: + case KRL_SECTION_CERT_SERIAL_RANGE: + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + if ((bitmap = bitmap_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + bitmap_start = rs->lo; + if ((r = sshbuf_put_u64(sect, + bitmap_start)) != 0) + goto out; + break; + } + } + + /* Perform section-specific processing */ + switch (state) { + case KRL_SECTION_CERT_SERIAL_LIST: + for (i = 0; i < contig; i++) { + if ((r = sshbuf_put_u64(sect, rs->lo + i)) != 0) + goto out; + } + break; + case KRL_SECTION_CERT_SERIAL_RANGE: + if ((r = sshbuf_put_u64(sect, rs->lo)) != 0 || + (r = sshbuf_put_u64(sect, rs->hi)) != 0) + goto out; + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + if (rs->lo - bitmap_start > INT_MAX) { + error("%s: insane bitmap gap", __func__); + goto out; + } + for (i = 0; i < contig; i++) { + if (bitmap_set_bit(bitmap, + rs->lo + i - bitmap_start) != 0) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + } + break; + } + last = rs->hi; + } + /* Flush the remaining section, if any */ + if (state != 0) { + KRL_DBG(("%s: serial final flush for state 0x%02x", + __func__, state)); + switch (state) { + case KRL_SECTION_CERT_SERIAL_LIST: + case KRL_SECTION_CERT_SERIAL_RANGE: + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + if ((r = put_bitmap(sect, bitmap)) != 0) + goto out; + bitmap_free(bitmap); + bitmap = NULL; + break; + } + if ((r = sshbuf_put_u8(buf, state)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + } + KRL_DBG(("%s: serial done ", __func__)); + + /* Now output a section for any revocations by key ID */ + sshbuf_reset(sect); + RB_FOREACH(rki, revoked_key_id_tree, &rc->revoked_key_ids) { + KRL_DBG(("%s: key ID %s", __func__, rki->key_id)); + if ((r = sshbuf_put_cstring(sect, rki->key_id)) != 0) + goto out; + } + if (sshbuf_len(sect) != 0) { + if ((r = sshbuf_put_u8(buf, KRL_SECTION_CERT_KEY_ID)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + } + r = 0; + out: + bitmap_free(bitmap); + sshbuf_free(sect); + return r; +} + +int +ssh_krl_to_blob(struct ssh_krl *krl, struct sshbuf *buf, + const struct sshkey **sign_keys, u_int nsign_keys) +{ + int r = SSH_ERR_INTERNAL_ERROR; + struct revoked_certs *rc; + struct revoked_blob *rb; + struct sshbuf *sect; + u_char *sblob = NULL; + size_t slen, i; + + if (krl->generated_date == 0) + krl->generated_date = time(NULL); + + if ((sect = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + + /* Store the header */ + if ((r = sshbuf_put(buf, KRL_MAGIC, sizeof(KRL_MAGIC) - 1)) != 0 || + (r = sshbuf_put_u32(buf, KRL_FORMAT_VERSION)) != 0 || + (r = sshbuf_put_u64(buf, krl->krl_version)) != 0 || + (r = sshbuf_put_u64(buf, krl->generated_date) != 0) || + (r = sshbuf_put_u64(buf, krl->flags)) != 0 || + (r = sshbuf_put_string(buf, NULL, 0)) != 0 || + (r = sshbuf_put_cstring(buf, krl->comment)) != 0) + goto out; + + /* Store sections for revoked certificates */ + TAILQ_FOREACH(rc, &krl->revoked_certs, entry) { + sshbuf_reset(sect); + if ((r = revoked_certs_generate(rc, sect)) != 0) + goto out; + if ((r = sshbuf_put_u8(buf, KRL_SECTION_CERTIFICATES)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + } + + /* Finally, output sections for revocations by public key/hash */ + sshbuf_reset(sect); + RB_FOREACH(rb, revoked_blob_tree, &krl->revoked_keys) { + KRL_DBG(("%s: key len %zu ", __func__, rb->len)); + if ((r = sshbuf_put_string(sect, rb->blob, rb->len)) != 0) + goto out; + } + if (sshbuf_len(sect) != 0) { + if ((r = sshbuf_put_u8(buf, KRL_SECTION_EXPLICIT_KEY)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + } + sshbuf_reset(sect); + RB_FOREACH(rb, revoked_blob_tree, &krl->revoked_sha1s) { + KRL_DBG(("%s: hash len %zu ", __func__, rb->len)); + if ((r = sshbuf_put_string(sect, rb->blob, rb->len)) != 0) + goto out; + } + if (sshbuf_len(sect) != 0) { + if ((r = sshbuf_put_u8(buf, + KRL_SECTION_FINGERPRINT_SHA1)) != 0 || + (r = sshbuf_put_stringb(buf, sect)) != 0) + goto out; + } + + for (i = 0; i < nsign_keys; i++) { + KRL_DBG(("%s: signature key %s", __func__, + sshkey_ssh_name(sign_keys[i]))); + if ((r = sshbuf_put_u8(buf, KRL_SECTION_SIGNATURE)) != 0 || + (r = sshkey_puts(sign_keys[i], buf)) != 0) + goto out; + + if ((r = sshkey_sign(sign_keys[i], &sblob, &slen, + sshbuf_ptr(buf), sshbuf_len(buf), 0)) != 0) + goto out; + KRL_DBG(("%s: signature sig len %zu", __func__, slen)); + if ((r = sshbuf_put_string(buf, sblob, slen)) != 0) + goto out; + } + + r = 0; + out: + free(sblob); + sshbuf_free(sect); + return r; +} + +static void +format_timestamp(u_int64_t timestamp, char *ts, size_t nts) +{ + time_t t; + struct tm *tm; + + t = timestamp; + tm = localtime(&t); + if (tm == NULL) + strlcpy(ts, "", nts); + else { + *ts = '\0'; + strftime(ts, nts, "%Y%m%dT%H%M%S", tm); + } +} + +static int +parse_revoked_certs(struct sshbuf *buf, struct ssh_krl *krl) +{ + int r = SSH_ERR_INTERNAL_ERROR; + u_char type; + const u_char *blob; + size_t blen, nbits; + struct sshbuf *subsect = NULL; + u_int64_t serial, serial_lo, serial_hi; + struct bitmap *bitmap = NULL; + char *key_id = NULL; + struct sshkey *ca_key = NULL; + + if ((subsect = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + + /* Header: key, reserved */ + if ((r = sshbuf_get_string_direct(buf, &blob, &blen)) != 0 || + (r = sshbuf_skip_string(buf)) != 0) + goto out; + if (blen != 0 && (r = sshkey_from_blob(blob, blen, &ca_key)) != 0) + goto out; + + while (sshbuf_len(buf) > 0) { + if (subsect != NULL) { + sshbuf_free(subsect); + subsect = NULL; + } + if ((r = sshbuf_get_u8(buf, &type)) != 0 || + (r = sshbuf_froms(buf, &subsect)) != 0) + goto out; + KRL_DBG(("%s: subsection type 0x%02x", __func__, type)); + /* sshbuf_dump(subsect, stderr); */ + + switch (type) { + case KRL_SECTION_CERT_SERIAL_LIST: + while (sshbuf_len(subsect) > 0) { + if ((r = sshbuf_get_u64(subsect, &serial)) != 0) + goto out; + if ((r = ssh_krl_revoke_cert_by_serial(krl, + ca_key, serial)) != 0) + goto out; + } + break; + case KRL_SECTION_CERT_SERIAL_RANGE: + if ((r = sshbuf_get_u64(subsect, &serial_lo)) != 0 || + (r = sshbuf_get_u64(subsect, &serial_hi)) != 0) + goto out; + if ((r = ssh_krl_revoke_cert_by_serial_range(krl, + ca_key, serial_lo, serial_hi)) != 0) + goto out; + break; + case KRL_SECTION_CERT_SERIAL_BITMAP: + if ((bitmap = bitmap_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_get_u64(subsect, &serial_lo)) != 0 || + (r = sshbuf_get_bignum2_bytes_direct(subsect, + &blob, &blen)) != 0) + goto out; + if (bitmap_from_string(bitmap, blob, blen) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + nbits = bitmap_nbits(bitmap); + for (serial = 0; serial < (u_int64_t)nbits; serial++) { + if (serial > 0 && serial_lo + serial == 0) { + error("%s: bitmap wraps u64", __func__); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (!bitmap_test_bit(bitmap, serial)) + continue; + if ((r = ssh_krl_revoke_cert_by_serial(krl, + ca_key, serial_lo + serial)) != 0) + goto out; + } + bitmap_free(bitmap); + bitmap = NULL; + break; + case KRL_SECTION_CERT_KEY_ID: + while (sshbuf_len(subsect) > 0) { + if ((r = sshbuf_get_cstring(subsect, + &key_id, NULL)) != 0) + goto out; + if ((r = ssh_krl_revoke_cert_by_key_id(krl, + ca_key, key_id)) != 0) + goto out; + free(key_id); + key_id = NULL; + } + break; + default: + error("Unsupported KRL certificate section %u", type); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(subsect) > 0) { + error("KRL certificate section contains unparsed data"); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + + r = 0; + out: + if (bitmap != NULL) + bitmap_free(bitmap); + free(key_id); + sshkey_free(ca_key); + sshbuf_free(subsect); + return r; +} + + +/* Attempt to parse a KRL, checking its signature (if any) with sign_ca_keys. */ +int +ssh_krl_from_blob(struct sshbuf *buf, struct ssh_krl **krlp, + const struct sshkey **sign_ca_keys, size_t nsign_ca_keys) +{ + struct sshbuf *copy = NULL, *sect = NULL; + struct ssh_krl *krl = NULL; + char timestamp[64]; + int r = SSH_ERR_INTERNAL_ERROR, sig_seen; + struct sshkey *key = NULL, **ca_used = NULL, **tmp_ca_used; + u_char type, *rdata = NULL; + const u_char *blob; + size_t i, j, sig_off, sects_off, rlen, blen, nca_used; + u_int format_version; + + nca_used = 0; + *krlp = NULL; + if (sshbuf_len(buf) < sizeof(KRL_MAGIC) - 1 || + memcmp(sshbuf_ptr(buf), KRL_MAGIC, sizeof(KRL_MAGIC) - 1) != 0) { + debug3("%s: not a KRL", __func__); + return SSH_ERR_KRL_BAD_MAGIC; + } + + /* Take a copy of the KRL buffer so we can verify its signature later */ + if ((copy = sshbuf_fromb(buf)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_consume(copy, sizeof(KRL_MAGIC) - 1)) != 0) + goto out; + + if ((krl = ssh_krl_init()) == NULL) { + error("%s: alloc failed", __func__); + goto out; + } + + if ((r = sshbuf_get_u32(copy, &format_version)) != 0) + goto out; + if (format_version != KRL_FORMAT_VERSION) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if ((r = sshbuf_get_u64(copy, &krl->krl_version)) != 0 || + (r = sshbuf_get_u64(copy, &krl->generated_date)) != 0 || + (r = sshbuf_get_u64(copy, &krl->flags)) != 0 || + (r = sshbuf_skip_string(copy)) != 0 || + (r = sshbuf_get_cstring(copy, &krl->comment, NULL)) != 0) + goto out; + + format_timestamp(krl->generated_date, timestamp, sizeof(timestamp)); + debug("KRL version %llu generated at %s%s%s", + (long long unsigned)krl->krl_version, timestamp, + *krl->comment ? ": " : "", krl->comment); + + /* + * 1st pass: verify signatures, if any. This is done to avoid + * detailed parsing of data whose provenance is unverified. + */ + sig_seen = 0; + if (sshbuf_len(buf) < sshbuf_len(copy)) { + /* Shouldn't happen */ + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } + sects_off = sshbuf_len(buf) - sshbuf_len(copy); + while (sshbuf_len(copy) > 0) { + if ((r = sshbuf_get_u8(copy, &type)) != 0 || + (r = sshbuf_get_string_direct(copy, &blob, &blen)) != 0) + goto out; + KRL_DBG(("%s: first pass, section 0x%02x", __func__, type)); + if (type != KRL_SECTION_SIGNATURE) { + if (sig_seen) { + error("KRL contains non-signature section " + "after signature"); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* Not interested for now. */ + continue; + } + sig_seen = 1; + /* First string component is the signing key */ + if ((r = sshkey_from_blob(blob, blen, &key)) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(buf) < sshbuf_len(copy)) { + /* Shouldn't happen */ + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } + sig_off = sshbuf_len(buf) - sshbuf_len(copy); + /* Second string component is the signature itself */ + if ((r = sshbuf_get_string_direct(copy, &blob, &blen)) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* Check signature over entire KRL up to this point */ + if ((r = sshkey_verify(key, blob, blen, + sshbuf_ptr(buf), sshbuf_len(buf) - sig_off, 0)) != 0) + goto out; + /* Check if this key has already signed this KRL */ + for (i = 0; i < nca_used; i++) { + if (sshkey_equal(ca_used[i], key)) { + error("KRL signed more than once with " + "the same key"); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + /* Record keys used to sign the KRL */ + tmp_ca_used = reallocarray(ca_used, nca_used + 1, + sizeof(*ca_used)); + if (tmp_ca_used == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + ca_used = tmp_ca_used; + ca_used[nca_used++] = key; + key = NULL; + break; + } + + if (sshbuf_len(copy) != 0) { + /* Shouldn't happen */ + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } + + /* + * 2nd pass: parse and load the KRL, skipping the header to the point + * where the section start. + */ + sshbuf_free(copy); + if ((copy = sshbuf_fromb(buf)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_consume(copy, sects_off)) != 0) + goto out; + while (sshbuf_len(copy) > 0) { + if (sect != NULL) { + sshbuf_free(sect); + sect = NULL; + } + if ((r = sshbuf_get_u8(copy, &type)) != 0 || + (r = sshbuf_froms(copy, §)) != 0) + goto out; + KRL_DBG(("%s: second pass, section 0x%02x", __func__, type)); + + switch (type) { + case KRL_SECTION_CERTIFICATES: + if ((r = parse_revoked_certs(sect, krl)) != 0) + goto out; + break; + case KRL_SECTION_EXPLICIT_KEY: + case KRL_SECTION_FINGERPRINT_SHA1: + while (sshbuf_len(sect) > 0) { + if ((r = sshbuf_get_string(sect, + &rdata, &rlen)) != 0) + goto out; + if (type == KRL_SECTION_FINGERPRINT_SHA1 && + rlen != 20) { + error("%s: bad SHA1 length", __func__); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if ((r = revoke_blob( + type == KRL_SECTION_EXPLICIT_KEY ? + &krl->revoked_keys : &krl->revoked_sha1s, + rdata, rlen)) != 0) + goto out; + rdata = NULL; /* revoke_blob frees rdata */ + } + break; + case KRL_SECTION_SIGNATURE: + /* Handled above, but still need to stay in synch */ + sshbuf_reset(sect); + sect = NULL; + if ((r = sshbuf_skip_string(copy)) != 0) + goto out; + break; + default: + error("Unsupported KRL section %u", type); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(sect) > 0) { + error("KRL section contains unparsed data"); + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + + /* Check that the key(s) used to sign the KRL weren't revoked */ + sig_seen = 0; + for (i = 0; i < nca_used; i++) { + if (ssh_krl_check_key(krl, ca_used[i]) == 0) + sig_seen = 1; + else { + sshkey_free(ca_used[i]); + ca_used[i] = NULL; + } + } + if (nca_used && !sig_seen) { + error("All keys used to sign KRL were revoked"); + r = SSH_ERR_KEY_REVOKED; + goto out; + } + + /* If we have CA keys, then verify that one was used to sign the KRL */ + if (sig_seen && nsign_ca_keys != 0) { + sig_seen = 0; + for (i = 0; !sig_seen && i < nsign_ca_keys; i++) { + for (j = 0; j < nca_used; j++) { + if (ca_used[j] == NULL) + continue; + if (sshkey_equal(ca_used[j], sign_ca_keys[i])) { + sig_seen = 1; + break; + } + } + } + if (!sig_seen) { + r = SSH_ERR_SIGNATURE_INVALID; + error("KRL not signed with any trusted key"); + goto out; + } + } + + *krlp = krl; + r = 0; + out: + if (r != 0) + ssh_krl_free(krl); + for (i = 0; i < nca_used; i++) + sshkey_free(ca_used[i]); + free(ca_used); + free(rdata); + sshkey_free(key); + sshbuf_free(copy); + sshbuf_free(sect); + return r; +} + +/* Checks certificate serial number and key ID revocation */ +static int +is_cert_revoked(const struct sshkey *key, struct revoked_certs *rc) +{ + struct revoked_serial rs, *ers; + struct revoked_key_id rki, *erki; + + /* Check revocation by cert key ID */ + memset(&rki, 0, sizeof(rki)); + rki.key_id = key->cert->key_id; + erki = RB_FIND(revoked_key_id_tree, &rc->revoked_key_ids, &rki); + if (erki != NULL) { + KRL_DBG(("%s: revoked by key ID", __func__)); + return SSH_ERR_KEY_REVOKED; + } + + /* + * Zero serials numbers are ignored (it's the default when the + * CA doesn't specify one). + */ + if (key->cert->serial == 0) + return 0; + + memset(&rs, 0, sizeof(rs)); + rs.lo = rs.hi = key->cert->serial; + ers = RB_FIND(revoked_serial_tree, &rc->revoked_serials, &rs); + if (ers != NULL) { + KRL_DBG(("%s: revoked serial %llu matched %llu:%llu", __func__, + key->cert->serial, ers->lo, ers->hi)); + return SSH_ERR_KEY_REVOKED; + } + return 0; +} + +/* Checks whether a given key/cert is revoked. Does not check its CA */ +static int +is_key_revoked(struct ssh_krl *krl, const struct sshkey *key) +{ + struct revoked_blob rb, *erb; + struct revoked_certs *rc; + int r; + + /* Check explicitly revoked hashes first */ + memset(&rb, 0, sizeof(rb)); + if ((r = sshkey_fingerprint_raw(key, SSH_DIGEST_SHA1, + &rb.blob, &rb.len)) != 0) + return r; + erb = RB_FIND(revoked_blob_tree, &krl->revoked_sha1s, &rb); + free(rb.blob); + if (erb != NULL) { + KRL_DBG(("%s: revoked by key SHA1", __func__)); + return SSH_ERR_KEY_REVOKED; + } + + /* Next, explicit keys */ + memset(&rb, 0, sizeof(rb)); + if ((r = plain_key_blob(key, &rb.blob, &rb.len)) != 0) + return r; + erb = RB_FIND(revoked_blob_tree, &krl->revoked_keys, &rb); + free(rb.blob); + if (erb != NULL) { + KRL_DBG(("%s: revoked by explicit key", __func__)); + return SSH_ERR_KEY_REVOKED; + } + + if (!sshkey_is_cert(key)) + return 0; + + /* Check cert revocation for the specified CA */ + if ((r = revoked_certs_for_ca_key(krl, key->cert->signature_key, + &rc, 0)) != 0) + return r; + if (rc != NULL) { + if ((r = is_cert_revoked(key, rc)) != 0) + return r; + } + /* Check cert revocation for the wildcard CA */ + if ((r = revoked_certs_for_ca_key(krl, NULL, &rc, 0)) != 0) + return r; + if (rc != NULL) { + if ((r = is_cert_revoked(key, rc)) != 0) + return r; + } + + KRL_DBG(("%s: %llu no match", __func__, key->cert->serial)); + return 0; +} + +int +ssh_krl_check_key(struct ssh_krl *krl, const struct sshkey *key) +{ + int r; + + KRL_DBG(("%s: checking key", __func__)); + if ((r = is_key_revoked(krl, key)) != 0) + return r; + if (sshkey_is_cert(key)) { + debug2("%s: checking CA key", __func__); + if ((r = is_key_revoked(krl, key->cert->signature_key)) != 0) + return r; + } + KRL_DBG(("%s: key okay", __func__)); + return 0; +} + +int +ssh_krl_file_contains_key(const char *path, const struct sshkey *key) +{ + struct sshbuf *krlbuf = NULL; + struct ssh_krl *krl = NULL; + int oerrno = 0, r, fd; + + if (path == NULL) + return 0; + + if ((krlbuf = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((fd = open(path, O_RDONLY)) == -1) { + r = SSH_ERR_SYSTEM_ERROR; + oerrno = errno; + goto out; + } + if ((r = sshkey_load_file(fd, krlbuf)) != 0) { + oerrno = errno; + goto out; + } + if ((r = ssh_krl_from_blob(krlbuf, &krl, NULL, 0)) != 0) + goto out; + debug2("%s: checking KRL %s", __func__, path); + r = ssh_krl_check_key(krl, key); + out: + close(fd); + sshbuf_free(krlbuf); + ssh_krl_free(krl); + if (r != 0) + errno = oerrno; + return r; +} diff --git a/krl.h b/krl.h new file mode 100644 index 0000000..4e12bef --- /dev/null +++ b/krl.h @@ -0,0 +1,65 @@ +/* + * Copyright (c) 2012 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* $OpenBSD: krl.h,v 1.4 2015/01/13 19:06:49 djm Exp $ */ + +#ifndef _KRL_H +#define _KRL_H + +/* Functions to manage key revocation lists */ + +#define KRL_MAGIC "SSHKRL\n\0" +#define KRL_FORMAT_VERSION 1 + +/* KRL section types */ +#define KRL_SECTION_CERTIFICATES 1 +#define KRL_SECTION_EXPLICIT_KEY 2 +#define KRL_SECTION_FINGERPRINT_SHA1 3 +#define KRL_SECTION_SIGNATURE 4 + +/* KRL_SECTION_CERTIFICATES subsection types */ +#define KRL_SECTION_CERT_SERIAL_LIST 0x20 +#define KRL_SECTION_CERT_SERIAL_RANGE 0x21 +#define KRL_SECTION_CERT_SERIAL_BITMAP 0x22 +#define KRL_SECTION_CERT_KEY_ID 0x23 + +struct sshkey; +struct sshbuf; +struct ssh_krl; + +struct ssh_krl *ssh_krl_init(void); +void ssh_krl_free(struct ssh_krl *krl); +void ssh_krl_set_version(struct ssh_krl *krl, u_int64_t version); +void ssh_krl_set_sign_key(struct ssh_krl *krl, const struct sshkey *sign_key); +int ssh_krl_set_comment(struct ssh_krl *krl, const char *comment); +int ssh_krl_revoke_cert_by_serial(struct ssh_krl *krl, + const struct sshkey *ca_key, u_int64_t serial); +int ssh_krl_revoke_cert_by_serial_range(struct ssh_krl *krl, + const struct sshkey *ca_key, u_int64_t lo, u_int64_t hi); +int ssh_krl_revoke_cert_by_key_id(struct ssh_krl *krl, + const struct sshkey *ca_key, const char *key_id); +int ssh_krl_revoke_key_explicit(struct ssh_krl *krl, const struct sshkey *key); +int ssh_krl_revoke_key_sha1(struct ssh_krl *krl, const struct sshkey *key); +int ssh_krl_revoke_key(struct ssh_krl *krl, const struct sshkey *key); +int ssh_krl_to_blob(struct ssh_krl *krl, struct sshbuf *buf, + const struct sshkey **sign_keys, u_int nsign_keys); +int ssh_krl_from_blob(struct sshbuf *buf, struct ssh_krl **krlp, + const struct sshkey **sign_ca_keys, size_t nsign_ca_keys); +int ssh_krl_check_key(struct ssh_krl *krl, const struct sshkey *key); +int ssh_krl_file_contains_key(const char *path, const struct sshkey *key); + +#endif /* _KRL_H */ + diff --git a/log.c b/log.c index 6220c57..e6d743b 100644 --- a/log.c +++ b/log.c @@ -1,4 +1,4 @@ -/* $OpenBSD: log.c,v 1.42 2011/06/17 21:44:30 djm Exp $ */ +/* $OpenBSD: log.c,v 1.46 2015/07/08 19:04:21 markus Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -38,6 +38,7 @@ #include +#include #include #include #include @@ -45,11 +46,10 @@ #include #include #include -#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) +#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) # include #endif -#include "xmalloc.h" #include "log.h" #ifdef WIN32_FIXME @@ -63,6 +63,7 @@ static LogLevel log_level = SYSLOG_LEVEL_INFO; static int log_on_stderr = 1; +static int log_stderr_fd = STDERR_FILENO; static int log_facility = LOG_AUTH; static char *argv0; static log_handler_fn *log_handler; @@ -338,6 +339,35 @@ log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr) #endif } +void +log_change_level(LogLevel new_log_level) +{ + /* no-op if log_init has not been called */ + if (argv0 == NULL) + return; + log_init(argv0, new_log_level, log_facility, log_on_stderr); +} + +int +log_is_on_stderr(void) +{ + return log_on_stderr; +} + +/* redirect what would usually get written to stderr to specified file */ +void +log_redirect_stderr_to(const char *logfile) +{ + int fd; + + if ((fd = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0600)) == -1) { + fprintf(stderr, "Couldn't open logfile %s: %s\n", logfile, + strerror(errno)); + exit(1); + } + log_stderr_fd = fd; +} + #define MSGBUFSIZ 1024 void @@ -413,7 +443,6 @@ do_log(LogLevel level, const char *fmt, va_list args) } else { vsnprintf(msgbuf, sizeof(msgbuf), fmt, args); } - #ifdef WIN32_FIXME strncpy(fmtbuf, msgbuf, sizeof(fmtbuf)); #else @@ -428,15 +457,16 @@ do_log(LogLevel level, const char *fmt, va_list args) log_handler = NULL; tmp_handler(level, fmtbuf, log_handler_ctx); log_handler = tmp_handler; - } else -#endif - if (log_on_stderr) { - snprintf(msgbuf, sizeof msgbuf, "%s\n", fmtbuf); - #ifdef WIN32_FIXME + } else +#endif + if (log_on_stderr) { + snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf); +#ifdef WIN32_FIXME _write(STDERR_FILENO, msgbuf, strlen(msgbuf)); - #else - write(STDERR_FILENO, msgbuf, strlen(msgbuf)); - #endif +#else + (void)write(log_stderr_fd, msgbuf, strlen(msgbuf)); +#endif + } else { #ifdef WIN32_FIXME @@ -457,7 +487,6 @@ do_log(LogLevel level, const char *fmt, va_list args) } #else - #if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT) openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata); syslog_r(pri, &sdata, "%.500s", fmtbuf); @@ -467,8 +496,7 @@ do_log(LogLevel level, const char *fmt, va_list args) syslog(pri, "%.500s", fmtbuf); closelog(); #endif - - #endif +#endif } errno = saved_errno; } diff --git a/log.h b/log.h index 1b8d214..ae7df25 100644 --- a/log.h +++ b/log.h @@ -1,4 +1,4 @@ -/* $OpenBSD: log.h,v 1.18 2011/06/17 21:44:30 djm Exp $ */ +/* $OpenBSD: log.h,v 1.20 2013/04/07 02:10:33 dtucker Exp $ */ /* * Author: Tatu Ylonen @@ -49,6 +49,9 @@ typedef enum { typedef void (log_handler_fn)(LogLevel, const char *, void *); void log_init(char *, LogLevel, SyslogFacility, int); +void log_change_level(LogLevel); +int log_is_on_stderr(void); +void log_redirect_stderr_to(const char *); SyslogFacility log_facility_number(char *); const char * log_facility_name(SyslogFacility); diff --git a/loginrec.c b/loginrec.c index 32941c9..94ae81d 100644 --- a/loginrec.c +++ b/loginrec.c @@ -180,10 +180,6 @@ # include #endif -#ifdef HAVE_LIBUTIL_H -# include -#endif - /** ** prototypes for helper functions in this file **/ @@ -314,9 +310,13 @@ login_get_lastlog(struct logininfo *li, const uid_t uid) fatal("%s: Cannot find account for uid %ld", __func__, (long)uid); - /* No MIN_SIZEOF here - we absolutely *must not* truncate the - * username (XXX - so check for trunc!) */ - strlcpy(li->username, pw->pw_name, sizeof(li->username)); + if (strlcpy(li->username, pw->pw_name, sizeof(li->username)) >= + sizeof(li->username)) { + error("%s: username too long (%lu > max %lu)", __func__, + (unsigned long)strlen(pw->pw_name), + (unsigned long)sizeof(li->username) - 1); + return NULL; + } if (getlast_entry(li)) return (li); @@ -324,7 +324,6 @@ login_get_lastlog(struct logininfo *li, const uid_t uid) return (NULL); } - /* * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise * a logininfo structure @@ -351,7 +350,7 @@ logininfo *login_alloc_entry(pid_t pid, const char *username, void login_free_entry(struct logininfo *li) { - xfree(li); + free(li); } @@ -788,12 +787,12 @@ construct_utmpx(struct logininfo *li, struct utmpx *utx) /* this is just a 128-bit IPv6 address */ if (li->hostaddr.sa.sa_family == AF_INET6) { sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); - memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); + memcpy(utx->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { - ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; - ut->ut_addr_v6[1] = 0; - ut->ut_addr_v6[2] = 0; - ut->ut_addr_v6[3] = 0; + utx->ut_addr_v6[0] = utx->ut_addr_v6[3]; + utx->ut_addr_v6[1] = 0; + utx->ut_addr_v6[2] = 0; + utx->ut_addr_v6[3] = 0; } } # endif diff --git a/mac.c b/mac.c index eef50f4..f63fbff 100644 --- a/mac.c +++ b/mac.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mac.c,v 1.16 2011/08/02 01:22:11 djm Exp $ */ +/* $OpenBSD: mac.c,v 1.32 2015/01/15 18:32:54 naddy Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -27,144 +27,202 @@ #include -#include - -#include #include -#include +#include -#include "xmalloc.h" -#include "log.h" -#include "cipher.h" -#include "buffer.h" -#include "key.h" -#include "kex.h" +#include "digest.h" +#include "hmac.h" +#include "umac.h" #include "mac.h" #include "misc.h" +#include "ssherr.h" +#include "sshbuf.h" -#include "umac.h" +#include "openbsd-compat/openssl-compat.h" -#define SSH_EVP 1 /* OpenSSL EVP-based MAC */ +#define SSH_DIGEST 1 /* SSH_DIGEST_XXX */ #define SSH_UMAC 2 /* UMAC (not integrated with OpenSSL) */ +#define SSH_UMAC128 3 -struct { +struct macalg { char *name; int type; - const EVP_MD * (*mdfunc)(void); + int alg; int truncatebits; /* truncate digest if != 0 */ int key_len; /* just for UMAC */ int len; /* just for UMAC */ -} macs[] = { - { "hmac-sha1", SSH_EVP, EVP_sha1, 0, -1, -1 }, - { "hmac-sha1-96", SSH_EVP, EVP_sha1, 96, -1, -1 }, -#ifdef HAVE_EVP_SHA256 - { "hmac-sha2-256", SSH_EVP, EVP_sha256, 0, -1, -1 }, - { "hmac-sha2-256-96", SSH_EVP, EVP_sha256, 96, -1, -1 }, - { "hmac-sha2-512", SSH_EVP, EVP_sha512, 0, -1, -1 }, - { "hmac-sha2-512-96", SSH_EVP, EVP_sha512, 96, -1, -1 }, -#endif - { "hmac-md5", SSH_EVP, EVP_md5, 0, -1, -1 }, - { "hmac-md5-96", SSH_EVP, EVP_md5, 96, -1, -1 }, - { "hmac-ripemd160", SSH_EVP, EVP_ripemd160, 0, -1, -1 }, - { "hmac-ripemd160@openssh.com", SSH_EVP, EVP_ripemd160, 0, -1, -1 }, - { "umac-64@openssh.com", SSH_UMAC, NULL, 0, 128, 64 }, - { NULL, 0, NULL, 0, -1, -1 } + int etm; /* Encrypt-then-MAC */ }; -static void -mac_setup_by_id(Mac *mac, int which) +static const struct macalg macs[] = { + /* Encrypt-and-MAC (encrypt-and-authenticate) variants */ + { "hmac-sha1", SSH_DIGEST, SSH_DIGEST_SHA1, 0, 0, 0, 0 }, + { "hmac-sha1-96", SSH_DIGEST, SSH_DIGEST_SHA1, 96, 0, 0, 0 }, +#ifdef HAVE_EVP_SHA256 + { "hmac-sha2-256", SSH_DIGEST, SSH_DIGEST_SHA256, 0, 0, 0, 0 }, + { "hmac-sha2-512", SSH_DIGEST, SSH_DIGEST_SHA512, 0, 0, 0, 0 }, +#endif + { "hmac-md5", SSH_DIGEST, SSH_DIGEST_MD5, 0, 0, 0, 0 }, + { "hmac-md5-96", SSH_DIGEST, SSH_DIGEST_MD5, 96, 0, 0, 0 }, + { "hmac-ripemd160", SSH_DIGEST, SSH_DIGEST_RIPEMD160, 0, 0, 0, 0 }, + { "hmac-ripemd160@openssh.com", SSH_DIGEST, SSH_DIGEST_RIPEMD160, 0, 0, 0, 0 }, + { "umac-64@openssh.com", SSH_UMAC, 0, 0, 128, 64, 0 }, + { "umac-128@openssh.com", SSH_UMAC128, 0, 0, 128, 128, 0 }, + + /* Encrypt-then-MAC variants */ + { "hmac-sha1-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_SHA1, 0, 0, 0, 1 }, + { "hmac-sha1-96-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_SHA1, 96, 0, 0, 1 }, +#ifdef HAVE_EVP_SHA256 + { "hmac-sha2-256-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_SHA256, 0, 0, 0, 1 }, + { "hmac-sha2-512-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_SHA512, 0, 0, 0, 1 }, +#endif + { "hmac-md5-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_MD5, 0, 0, 0, 1 }, + { "hmac-md5-96-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_MD5, 96, 0, 0, 1 }, + { "hmac-ripemd160-etm@openssh.com", SSH_DIGEST, SSH_DIGEST_RIPEMD160, 0, 0, 0, 1 }, + { "umac-64-etm@openssh.com", SSH_UMAC, 0, 0, 128, 64, 1 }, + { "umac-128-etm@openssh.com", SSH_UMAC128, 0, 0, 128, 128, 1 }, + + { NULL, 0, 0, 0, 0, 0, 0 } +}; + +/* Returns a list of supported MACs separated by the specified char. */ +char * +mac_alg_list(char sep) { - int evp_len; - mac->type = macs[which].type; - if (mac->type == SSH_EVP) { - mac->evp_md = (*macs[which].mdfunc)(); - if ((evp_len = EVP_MD_size(mac->evp_md)) <= 0) - fatal("mac %s len %d", mac->name, evp_len); - mac->key_len = mac->mac_len = (u_int)evp_len; + char *ret = NULL, *tmp; + size_t nlen, rlen = 0; + const struct macalg *m; + + for (m = macs; m->name != NULL; m++) { + if (ret != NULL) + ret[rlen++] = sep; + nlen = strlen(m->name); + if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) { + free(ret); + return NULL; + } + ret = tmp; + memcpy(ret + rlen, m->name, nlen + 1); + rlen += nlen; + } + return ret; +} + +static int +mac_setup_by_alg(struct sshmac *mac, const struct macalg *macalg) +{ + mac->type = macalg->type; + if (mac->type == SSH_DIGEST) { + if ((mac->hmac_ctx = ssh_hmac_start(macalg->alg)) == NULL) + return SSH_ERR_ALLOC_FAIL; + mac->key_len = mac->mac_len = ssh_hmac_bytes(macalg->alg); } else { - mac->mac_len = macs[which].len / 8; - mac->key_len = macs[which].key_len / 8; + mac->mac_len = macalg->len / 8; + mac->key_len = macalg->key_len / 8; mac->umac_ctx = NULL; } - if (macs[which].truncatebits != 0) - mac->mac_len = macs[which].truncatebits / 8; + if (macalg->truncatebits != 0) + mac->mac_len = macalg->truncatebits / 8; + mac->etm = macalg->etm; + return 0; } int -mac_setup(Mac *mac, char *name) +mac_setup(struct sshmac *mac, char *name) { - int i; + const struct macalg *m; - for (i = 0; macs[i].name; i++) { - if (strcmp(name, macs[i].name) == 0) { - if (mac != NULL) - mac_setup_by_id(mac, i); - debug2("mac_setup: found %s", name); - return (0); - } + for (m = macs; m->name != NULL; m++) { + if (strcmp(name, m->name) != 0) + continue; + if (mac != NULL) + return mac_setup_by_alg(mac, m); + return 0; } - debug2("mac_setup: unknown %s", name); - return (-1); + return SSH_ERR_INVALID_ARGUMENT; } int -mac_init(Mac *mac) +mac_init(struct sshmac *mac) { if (mac->key == NULL) - fatal("mac_init: no key"); + return SSH_ERR_INVALID_ARGUMENT; switch (mac->type) { - case SSH_EVP: - if (mac->evp_md == NULL) - return -1; - HMAC_Init(&mac->evp_ctx, mac->key, mac->key_len, mac->evp_md); + case SSH_DIGEST: + if (mac->hmac_ctx == NULL || + ssh_hmac_init(mac->hmac_ctx, mac->key, mac->key_len) < 0) + return SSH_ERR_INVALID_ARGUMENT; return 0; case SSH_UMAC: - mac->umac_ctx = umac_new(mac->key); + if ((mac->umac_ctx = umac_new(mac->key)) == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; + case SSH_UMAC128: + if ((mac->umac_ctx = umac128_new(mac->key)) == NULL) + return SSH_ERR_ALLOC_FAIL; return 0; default: - return -1; + return SSH_ERR_INVALID_ARGUMENT; } } -u_char * -mac_compute(Mac *mac, u_int32_t seqno, u_char *data, int datalen) +int +mac_compute(struct sshmac *mac, u_int32_t seqno, const u_char *data, int datalen, + u_char *digest, size_t dlen) { - static u_char m[EVP_MAX_MD_SIZE]; - u_char b[4], nonce[8]; + static union { + u_char m[SSH_DIGEST_MAX_LENGTH]; + u_int64_t for_align; + } u; + u_char b[4]; + u_char nonce[8]; - if (mac->mac_len > sizeof(m)) - fatal("mac_compute: mac too long %u %lu", - mac->mac_len, (u_long)sizeof(m)); + if (mac->mac_len > sizeof(u)) + return SSH_ERR_INTERNAL_ERROR; switch (mac->type) { - case SSH_EVP: + case SSH_DIGEST: put_u32(b, seqno); /* reset HMAC context */ - HMAC_Init(&mac->evp_ctx, NULL, 0, NULL); - HMAC_Update(&mac->evp_ctx, b, sizeof(b)); - HMAC_Update(&mac->evp_ctx, data, datalen); - HMAC_Final(&mac->evp_ctx, m, NULL); + if (ssh_hmac_init(mac->hmac_ctx, NULL, 0) < 0 || + ssh_hmac_update(mac->hmac_ctx, b, sizeof(b)) < 0 || + ssh_hmac_update(mac->hmac_ctx, data, datalen) < 0 || + ssh_hmac_final(mac->hmac_ctx, u.m, sizeof(u.m)) < 0) + return SSH_ERR_LIBCRYPTO_ERROR; break; case SSH_UMAC: - put_u64(nonce, seqno); + POKE_U64(nonce, seqno); umac_update(mac->umac_ctx, data, datalen); - umac_final(mac->umac_ctx, m, nonce); + umac_final(mac->umac_ctx, u.m, nonce); + break; + case SSH_UMAC128: + put_u64(nonce, seqno); + umac128_update(mac->umac_ctx, data, datalen); + umac128_final(mac->umac_ctx, u.m, nonce); break; default: - fatal("mac_compute: unknown MAC type"); + return SSH_ERR_INVALID_ARGUMENT; } - return (m); + if (digest != NULL) { + if (dlen > mac->mac_len) + dlen = mac->mac_len; + memcpy(digest, u.m, dlen); + } + return 0; } void -mac_clear(Mac *mac) +mac_clear(struct sshmac *mac) { if (mac->type == SSH_UMAC) { if (mac->umac_ctx != NULL) umac_delete(mac->umac_ctx); - } else if (mac->evp_md != NULL) - HMAC_cleanup(&mac->evp_ctx); - mac->evp_md = NULL; + } else if (mac->type == SSH_UMAC128) { + if (mac->umac_ctx != NULL) + umac128_delete(mac->umac_ctx); + } else if (mac->hmac_ctx != NULL) + ssh_hmac_free(mac->hmac_ctx); + mac->hmac_ctx = NULL; mac->umac_ctx = NULL; } @@ -176,19 +234,16 @@ mac_valid(const char *names) char *maclist, *cp, *p; if (names == NULL || strcmp(names, "") == 0) - return (0); - maclist = cp = xstrdup(names); + return 0; + if ((maclist = cp = strdup(names)) == NULL) + return 0; for ((p = strsep(&cp, MAC_SEP)); p && *p != '\0'; (p = strsep(&cp, MAC_SEP))) { if (mac_setup(NULL, p) < 0) { - debug("bad mac %s [%s]", p, names); - xfree(maclist); - return (0); - } else { - debug3("mac ok: %s [%s]", p, names); + free(maclist); + return 0; } } - debug3("macs ok: [%s]", names); - xfree(maclist); - return (1); + free(maclist); + return 1; } diff --git a/mac.h b/mac.h index 39f564d..e5f6b84 100644 --- a/mac.h +++ b/mac.h @@ -1,4 +1,4 @@ -/* $OpenBSD: mac.h,v 1.6 2007/06/07 19:37:34 pvalchev Exp $ */ +/* $OpenBSD: mac.h,v 1.9 2015/01/13 19:31:40 markus Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -23,8 +23,29 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#ifndef SSHMAC_H +#define SSHMAC_H + +#include + +struct sshmac { + char *name; + int enabled; + u_int mac_len; + u_char *key; + u_int key_len; + int type; + int etm; /* Encrypt-then-MAC */ + struct ssh_hmac_ctx *hmac_ctx; + struct umac_ctx *umac_ctx; +}; + int mac_valid(const char *); -int mac_setup(Mac *, char *); -int mac_init(Mac *); -u_char *mac_compute(Mac *, u_int32_t, u_char *, int); -void mac_clear(Mac *); +char *mac_alg_list(char); +int mac_setup(struct sshmac *, char *); +int mac_init(struct sshmac *); +int mac_compute(struct sshmac *, u_int32_t, const u_char *, int, + u_char *, size_t); +void mac_clear(struct sshmac *); + +#endif /* SSHMAC_H */ diff --git a/match.c b/match.c index 2389477..913b6ba 100644 --- a/match.c +++ b/match.c @@ -1,4 +1,4 @@ -/* $OpenBSD: match.c,v 1.27 2008/06/10 23:06:19 djm Exp $ */ +/* $OpenBSD: match.c,v 1.30 2015/05/04 06:10:48 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -40,6 +40,7 @@ #include #include +#include #include #include "xmalloc.h" @@ -114,15 +115,13 @@ match_pattern(const char *s, const char *pattern) * indicate negation). Returns -1 if negation matches, 1 if there is * a positive match, 0 if there is no match at all. */ - int -match_pattern_list(const char *string, const char *pattern, u_int len, - int dolower) +match_pattern_list(const char *string, const char *pattern, int dolower) { char sub[1024]; int negated; int got_positive; - u_int i, subi; + u_int i, subi, len = strlen(pattern); got_positive = 0; for (i = 0; i < len;) { @@ -140,8 +139,8 @@ match_pattern_list(const char *string, const char *pattern, u_int len, for (subi = 0; i < len && subi < sizeof(sub) - 1 && pattern[i] != ','; subi++, i++) - sub[subi] = dolower && isupper(pattern[i]) ? - (char)tolower(pattern[i]) : pattern[i]; + sub[subi] = dolower && isupper((u_char)pattern[i]) ? + tolower((u_char)pattern[i]) : pattern[i]; /* If subpattern too long, return failure (no match). */ if (subi >= sizeof(sub) - 1) return 0; @@ -176,9 +175,9 @@ match_pattern_list(const char *string, const char *pattern, u_int len, * a positive match, 0 if there is no match at all. */ int -match_hostname(const char *host, const char *pattern, u_int len) +match_hostname(const char *host, const char *pattern) { - return match_pattern_list(host, pattern, len, 1); + return match_pattern_list(host, pattern, 1); } /* @@ -199,7 +198,7 @@ match_host_and_ip(const char *host, const char *ipaddr, return 0; /* negative hostname match */ - if ((mhost = match_hostname(host, patterns, strlen(patterns))) == -1) + if ((mhost = match_hostname(host, patterns)) == -1) return 0; /* no match at all */ if (mhost == 0 && mip == 0) @@ -226,14 +225,14 @@ match_user(const char *user, const char *host, const char *ipaddr, if ((ret = match_pattern(user, pat)) == 1) ret = match_host_and_ip(host, ipaddr, p); - xfree(pat); + free(pat); return ret; } /* * Returns first item from client-list that is also supported by server-list, - * caller must xfree() returned string. + * caller must free the returned string. */ #define MAX_PROP 40 #define SEP "," @@ -264,15 +263,15 @@ match_list(const char *client, const char *server, u_int *next) if (next != NULL) *next = (cp == NULL) ? strlen(c) : (u_int)(cp - c); - xfree(c); - xfree(s); + free(c); + free(s); return ret; } } } if (next != NULL) *next = strlen(c); - xfree(c); - xfree(s); + free(c); + free(s); return NULL; } diff --git a/match.h b/match.h index 3d7f70f..db97ca8 100644 --- a/match.h +++ b/match.h @@ -1,4 +1,4 @@ -/* $OpenBSD: match.h,v 1.15 2010/02/26 20:29:54 djm Exp $ */ +/* $OpenBSD: match.h,v 1.16 2015/05/04 06:10:48 djm Exp $ */ /* * Author: Tatu Ylonen @@ -15,8 +15,8 @@ #define MATCH_H int match_pattern(const char *, const char *); -int match_pattern_list(const char *, const char *, u_int, int); -int match_hostname(const char *, const char *, u_int); +int match_pattern_list(const char *, const char *, int); +int match_hostname(const char *, const char *); int match_host_and_ip(const char *, const char *, const char *); int match_user(const char *, const char *, const char *, const char *); char *match_list(const char *, const char *, u_int *); diff --git a/misc.c b/misc.c index abd81fd..0031f02 100644 --- a/misc.c +++ b/misc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: misc.c,v 1.85 2011/03/29 18:54:17 stevesk Exp $ */ +/* $OpenBSD: misc.c,v 1.97 2015/04/24 01:36:00 deraadt Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2005,2006 Damien Miller. All rights reserved. @@ -29,8 +29,9 @@ #include #include #include -#include +#include +#include #include #include #include @@ -43,6 +44,7 @@ #include #include +#include #include #include #include @@ -88,7 +90,6 @@ set_nonblock(int fd) return 0; #else - int val; val = fcntl(fd, F_GETFL, 0); @@ -123,7 +124,6 @@ unset_nonblock(int fd) return 0; #else - int val; val = fcntl(fd, F_GETFL, 0); @@ -149,7 +149,7 @@ unset_nonblock(int fd) const char * ssh_gai_strerror(int gaierr) { - if (gaierr == EAI_SYSTEM) + if (gaierr == EAI_SYSTEM && errno != 0) return strerror(errno); return gai_strerror(gaierr); } @@ -228,26 +228,27 @@ pwcopy(struct passwd *pw) copy->pw_name = xstrdup(pw->pw_name); copy->pw_passwd = xstrdup(pw->pw_passwd); +#ifdef HAVE_STRUCT_PASSWD_PW_GECOS copy->pw_gecos = xstrdup(pw->pw_gecos); +#endif copy->pw_uid = pw->pw_uid; copy->pw_gid = pw->pw_gid; -#ifdef HAVE_PW_EXPIRE_IN_PASSWD +#ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE copy->pw_expire = pw->pw_expire; #endif -#ifdef HAVE_PW_CHANGE_IN_PASSWD +#ifdef HAVE_STRUCT_PASSWD_PW_CHANGE copy->pw_change = pw->pw_change; #endif -#ifdef HAVE_PW_CLASS_IN_PASSWD +#ifdef HAVE_STRUCT_PASSWD_PW_CLASS copy->pw_class = xstrdup(pw->pw_class); #endif + #ifdef WIN32_FIXME copy -> pw_dir = _wcsdup(pw -> pw_dir); #else copy->pw_dir = xstrdup(pw->pw_dir); #endif - copy->pw_shell = xstrdup(pw->pw_shell); - return copy; } @@ -279,13 +280,13 @@ a2tun(const char *s, int *remote) *remote = SSH_TUNID_ANY; sp = xstrdup(s); if ((ep = strchr(sp, ':')) == NULL) { - xfree(sp); + free(sp); return (a2tun(s, NULL)); } ep[0] = '\0'; ep++; *remote = a2tun(ep, NULL); tun = a2tun(sp, NULL); - xfree(sp); + free(sp); return (*remote == SSH_TUNID_ERR ? *remote : tun); } @@ -496,7 +497,7 @@ addargs(arglist *args, char *fmt, ...) } else if (args->num+2 >= nalloc) nalloc *= 2; - args->list = xrealloc(args->list, nalloc, sizeof(char *)); + args->list = xreallocarray(args->list, nalloc, sizeof(char *)); args->nalloc = nalloc; args->list[args->num++] = cp; args->list[args->num] = NULL; @@ -518,7 +519,7 @@ replacearg(arglist *args, u_int which, char *fmt, ...) if (which >= args->num) fatal("replacearg: tried to replace invalid arg %d >= %d", which, args->num); - xfree(args->list[which]); + free(args->list[which]); args->list[which] = cp; } @@ -529,8 +530,8 @@ freeargs(arglist *args) if (args->list != NULL) { for (i = 0; i < args->num; i++) - xfree(args->list[i]); - xfree(args->list); + free(args->list[i]); + free(args->list); args->nalloc = args->num = 0; args->list = NULL; } @@ -543,8 +544,8 @@ freeargs(arglist *args) char * tilde_expand_filename(const char *filename, uid_t uid) { - const char *path; - char user[128], ret[MAXPATHLEN]; + const char *path, *sep; + char user[128], ret[MAXPATHLEN], *ret2; struct passwd *pw; u_int len, slash; @@ -570,7 +571,7 @@ tilde_expand_filename(const char *filename, uid_t uid) // Catch case when, homedir is unknown or doesn't exist // e.g. for SYSTEM user. Then, redirect path to NUL. // - + if (wcslen(pw -> pw_dir) == 0) { snprintf(ret, sizeof(ret), "NUL"); @@ -580,28 +581,31 @@ tilde_expand_filename(const char *filename, uid_t uid) #else if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret)) #endif - - fatal("tilde_expand_filename: Path too long"); /* Make sure directory has a trailing '/' */ - #ifdef WIN32_FIXME - len = strlen(ret); - if ((len == 0 || ret[len - 1] != '/') && - strlcat(ret, "/", sizeof(ret)) >= sizeof(ret)) +// len = strlen(ret); +// if ((len == 0 || ret[len - 1] != '/') && +// strlcat(ret, "/", sizeof(ret)) >= sizeof(ret)) #else len = strlen(pw->pw_dir); - if ((len == 0 || pw->pw_dir[len - 1] != '/') && - strlcat(ret, "/", sizeof(ret)) >= sizeof(ret)) + if (len == 0 || pw->pw_dir[len - 1] != '/') + sep = "/"; + else + sep = ""; #endif - fatal("tilde_expand_filename: Path too long"); /* Skip leading '/' from specified path */ if (path != NULL) filename = path + 1; - if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret)) + +#ifdef WIN32_FIXME + if (xasprintf(&ret2, "%s%s", ret, filename) >= PATH_MAX) +#else + if (xasprintf(&ret2, "%s%s%s", pw->pw_dir, sep, filename) >= PATH_MAX) +#endif fatal("tilde_expand_filename: Path too long"); - return (xstrdup(ret)); + return (ret2); } /* @@ -723,7 +727,6 @@ wchar_t *percent_expand_w(const wchar_t *string, ...) #undef EXPAND_MAX_KEYS } #endif - /* * Read an entire line from a public key file into a static buffer, discarding * lines that exceed the buffer size. Returns 0 on success, -1 on failure. @@ -896,6 +899,20 @@ get_u32(const void *vp) return (v); } +u_int32_t +get_u32_le(const void *vp) +{ + const u_char *p = (const u_char *)vp; + u_int32_t v; + + v = (u_int32_t)p[0]; + v |= (u_int32_t)p[1] << 8; + v |= (u_int32_t)p[2] << 16; + v |= (u_int32_t)p[3] << 24; + + return (v); +} + u_int16_t get_u16(const void *vp) { @@ -934,6 +951,16 @@ put_u32(void *vp, u_int32_t v) p[3] = (u_char)v & 0xff; } +void +put_u32_le(void *vp, u_int32_t v) +{ + u_char *p = (u_char *)vp; + + p[0] = (u_char)v & 0xff; + p[1] = (u_char)(v >> 8) & 0xff; + p[2] = (u_char)(v >> 16) & 0xff; + p[3] = (u_char)(v >> 24) & 0xff; +} void put_u16(void *vp, u_int16_t v) @@ -963,6 +990,31 @@ ms_to_timeval(struct timeval *tv, int ms) tv->tv_usec = (ms % 1000) * 1000; } +time_t +monotime(void) +{ +#if defined(HAVE_CLOCK_GETTIME) && \ + (defined(CLOCK_MONOTONIC) || defined(CLOCK_BOOTTIME)) + struct timespec ts; + static int gettime_failed = 0; + + if (!gettime_failed) { +#if defined(CLOCK_BOOTTIME) + if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0) + return (ts.tv_sec); +#endif +#if defined(CLOCK_MONOTONIC) + if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) + return (ts.tv_sec); +#endif + debug3("clock_gettime: %s", strerror(errno)); + gettime_failed = 1; + } +#endif /* HAVE_CLOCK_GETTIME && (CLOCK_MONOTONIC || CLOCK_BOOTTIME */ + + return time(NULL); +} + void bandwidth_limit_init(struct bwlimit *bw, u_int64_t kbps, size_t buflen) { @@ -1053,7 +1105,7 @@ static const struct { { "af11", IPTOS_DSCP_AF11 }, { "af12", IPTOS_DSCP_AF12 }, { "af13", IPTOS_DSCP_AF13 }, - { "af14", IPTOS_DSCP_AF21 }, + { "af21", IPTOS_DSCP_AF21 }, { "af22", IPTOS_DSCP_AF22 }, { "af23", IPTOS_DSCP_AF23 }, { "af31", IPTOS_DSCP_AF31 }, @@ -1110,6 +1162,60 @@ iptos2str(int iptos) snprintf(iptos_str, sizeof iptos_str, "0x%02x", iptos); return iptos_str; } + +void +lowercase(char *s) +{ + for (; *s; s++) + *s = tolower((u_char)*s); +} + +int +unix_listener(const char *path, int backlog, int unlink_first) +{ + struct sockaddr_un sunaddr; + int saved_errno, sock; + + memset(&sunaddr, 0, sizeof(sunaddr)); + sunaddr.sun_family = AF_UNIX; + if (strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)) >= sizeof(sunaddr.sun_path)) { + error("%s: \"%s\" too long for Unix domain socket", __func__, + path); + errno = ENAMETOOLONG; + return -1; + } + + sock = socket(PF_UNIX, SOCK_STREAM, 0); + if (sock < 0) { + saved_errno = errno; + error("socket: %.100s", strerror(errno)); + errno = saved_errno; + return -1; + } + if (unlink_first == 1) { + if (unlink(path) != 0 && errno != ENOENT) + error("unlink(%s): %.100s", path, strerror(errno)); + } + if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) { + saved_errno = errno; + error("bind: %.100s", strerror(errno)); + close(sock); + error("%s: cannot bind to path: %s", __func__, path); + errno = saved_errno; + return -1; + } + if (listen(sock, backlog) < 0) { + saved_errno = errno; + error("listen: %.100s", strerror(errno)); + close(sock); + unlink(path); + error("%s: cannot listen on path: %s", __func__, path); + errno = saved_errno; + return -1; + } + return sock; +} + void sock_set_v6only(int s) { diff --git a/misc.c.orig b/misc.c.orig new file mode 100644 index 0000000..af1e625 --- /dev/null +++ b/misc.c.orig @@ -0,0 +1,1225 @@ +/* $OpenBSD: misc.c,v 1.97 2015/04/24 01:36:00 deraadt Exp $ */ +/* + * Copyright (c) 2000 Markus Friedl. All rights reserved. + * Copyright (c) 2005,2006 Damien Miller. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#ifdef HAVE_PATHS_H +# include +#include +#endif +#ifdef SSH_TUN_OPENBSD +#include +#endif + +#include "xmalloc.h" +#include "misc.h" +#include "log.h" +#include "ssh.h" + +/* remove newline at end of string */ +char * +chop(char *s) +{ + char *t = s; + while (*t) { + if (*t == '\n' || *t == '\r') { + *t = '\0'; + return s; + } + t++; + } + return s; + +} + +/* set/unset filedescriptor to non-blocking */ +int +set_nonblock(int fd) +{ +#ifdef WIN32_FIXME + + int on = 1; + + ioctlsocket(fd, FIONBIO, &on); + + return 0; + +#else + int val; + + val = fcntl(fd, F_GETFL, 0); + if (val < 0) { + error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); + return (-1); + } + if (val & O_NONBLOCK) { + debug3("fd %d is O_NONBLOCK", fd); + return (0); + } + debug2("fd %d setting O_NONBLOCK", fd); + val |= O_NONBLOCK; + if (fcntl(fd, F_SETFL, val) == -1) { + debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd, + strerror(errno)); + return (-1); + } + return (0); +#endif /* else WIN32_FIXME */ +} + +int +unset_nonblock(int fd) +{ +#ifdef WIN32_FIXME + + int on = 0; + + ioctlsocket(fd, FIONBIO, &on); + + return 0; + +#else + int val; + + val = fcntl(fd, F_GETFL, 0); + if (val < 0) { + error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); + return (-1); + } + if (!(val & O_NONBLOCK)) { + debug3("fd %d is not O_NONBLOCK", fd); + return (0); + } + debug("fd %d clearing O_NONBLOCK", fd); + val &= ~O_NONBLOCK; + if (fcntl(fd, F_SETFL, val) == -1) { + debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s", + fd, strerror(errno)); + return (-1); + } + return (0); +#endif +} + +const char * +ssh_gai_strerror(int gaierr) +{ + if (gaierr == EAI_SYSTEM && errno != 0) + return strerror(errno); + return gai_strerror(gaierr); +} + +/* disable nagle on socket */ +void +set_nodelay(int fd) +{ + int opt; + socklen_t optlen; + + optlen = sizeof opt; + if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) { + debug("getsockopt TCP_NODELAY: %.100s", strerror(errno)); + return; + } + if (opt == 1) { + debug2("fd %d is TCP_NODELAY", fd); + return; + } + opt = 1; + debug2("fd %d setting TCP_NODELAY", fd); + if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1) + error("setsockopt TCP_NODELAY: %.100s", strerror(errno)); +} + +/* Characters considered whitespace in strsep calls. */ +#define WHITESPACE " \t\r\n" +#define QUOTE "\"" + +/* return next token in configuration line */ +char * +strdelim(char **s) +{ + char *old; + int wspace = 0; + + if (*s == NULL) + return NULL; + + old = *s; + + *s = strpbrk(*s, WHITESPACE QUOTE "="); + if (*s == NULL) + return (old); + + if (*s[0] == '\"') { + memmove(*s, *s + 1, strlen(*s)); /* move nul too */ + /* Find matching quote */ + if ((*s = strpbrk(*s, QUOTE)) == NULL) { + return (NULL); /* no matching quote */ + } else { + *s[0] = '\0'; + *s += strspn(*s + 1, WHITESPACE) + 1; + return (old); + } + } + + /* Allow only one '=' to be skipped */ + if (*s[0] == '=') + wspace = 1; + *s[0] = '\0'; + + /* Skip any extra whitespace after first token */ + *s += strspn(*s + 1, WHITESPACE) + 1; + if (*s[0] == '=' && !wspace) + *s += strspn(*s + 1, WHITESPACE) + 1; + + return (old); +} + +struct passwd * +pwcopy(struct passwd *pw) +{ + struct passwd *copy = xcalloc(1, sizeof(*copy)); + + copy->pw_name = xstrdup(pw->pw_name); + copy->pw_passwd = xstrdup(pw->pw_passwd); +#ifdef HAVE_STRUCT_PASSWD_PW_GECOS + copy->pw_gecos = xstrdup(pw->pw_gecos); +#endif + copy->pw_uid = pw->pw_uid; + copy->pw_gid = pw->pw_gid; +#ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE + copy->pw_expire = pw->pw_expire; +#endif +#ifdef HAVE_STRUCT_PASSWD_PW_CHANGE + copy->pw_change = pw->pw_change; +#endif +#ifdef HAVE_STRUCT_PASSWD_PW_CLASS + copy->pw_class = xstrdup(pw->pw_class); +#endif + +#ifdef WIN32_FIXME + copy -> pw_dir = _wcsdup(pw -> pw_dir); +#else + copy->pw_dir = xstrdup(pw->pw_dir); +#endif + copy->pw_shell = xstrdup(pw->pw_shell); + return copy; +} + +/* + * Convert ASCII string to TCP/IP port number. + * Port must be >=0 and <=65535. + * Return -1 if invalid. + */ +int +a2port(const char *s) +{ + long long port; + const char *errstr; + + port = strtonum(s, 0, 65535, &errstr); + if (errstr != NULL) + return -1; + return (int)port; +} + +int +a2tun(const char *s, int *remote) +{ + const char *errstr = NULL; + char *sp, *ep; + int tun; + + if (remote != NULL) { + *remote = SSH_TUNID_ANY; + sp = xstrdup(s); + if ((ep = strchr(sp, ':')) == NULL) { + free(sp); + return (a2tun(s, NULL)); + } + ep[0] = '\0'; ep++; + *remote = a2tun(ep, NULL); + tun = a2tun(sp, NULL); + free(sp); + return (*remote == SSH_TUNID_ERR ? *remote : tun); + } + + if (strcasecmp(s, "any") == 0) + return (SSH_TUNID_ANY); + + tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr); + if (errstr != NULL) + return (SSH_TUNID_ERR); + + return (tun); +} + +#define SECONDS 1 +#define MINUTES (SECONDS * 60) +#define HOURS (MINUTES * 60) +#define DAYS (HOURS * 24) +#define WEEKS (DAYS * 7) + +/* + * Convert a time string into seconds; format is + * a sequence of: + * time[qualifier] + * + * Valid time qualifiers are: + * seconds + * s|S seconds + * m|M minutes + * h|H hours + * d|D days + * w|W weeks + * + * Examples: + * 90m 90 minutes + * 1h30m 90 minutes + * 2d 2 days + * 1w 1 week + * + * Return -1 if time string is invalid. + */ +long +convtime(const char *s) +{ + long total, secs; + const char *p; + char *endp; + + errno = 0; + total = 0; + p = s; + + if (p == NULL || *p == '\0') + return -1; + + while (*p) { + secs = strtol(p, &endp, 10); + if (p == endp || + (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) || + secs < 0) + return -1; + + switch (*endp++) { + case '\0': + endp--; + break; + case 's': + case 'S': + break; + case 'm': + case 'M': + secs *= MINUTES; + break; + case 'h': + case 'H': + secs *= HOURS; + break; + case 'd': + case 'D': + secs *= DAYS; + break; + case 'w': + case 'W': + secs *= WEEKS; + break; + default: + return -1; + } + total += secs; + if (total < 0) + return -1; + p = endp; + } + + return total; +} + +/* + * Returns a standardized host+port identifier string. + * Caller must free returned string. + */ +char * +put_host_port(const char *host, u_short port) +{ + char *hoststr; + + if (port == 0 || port == SSH_DEFAULT_PORT) + return(xstrdup(host)); + if (asprintf(&hoststr, "[%s]:%d", host, (int)port) < 0) + fatal("put_host_port: asprintf: %s", strerror(errno)); + debug3("put_host_port: %s", hoststr); + return hoststr; +} + +/* + * Search for next delimiter between hostnames/addresses and ports. + * Argument may be modified (for termination). + * Returns *cp if parsing succeeds. + * *cp is set to the start of the next delimiter, if one was found. + * If this is the last field, *cp is set to NULL. + */ +char * +hpdelim(char **cp) +{ + char *s, *old; + + if (cp == NULL || *cp == NULL) + return NULL; + + old = s = *cp; + if (*s == '[') { + if ((s = strchr(s, ']')) == NULL) + return NULL; + else + s++; + } else if ((s = strpbrk(s, ":/")) == NULL) + s = *cp + strlen(*cp); /* skip to end (see first case below) */ + + switch (*s) { + case '\0': + *cp = NULL; /* no more fields*/ + break; + + case ':': + case '/': + *s = '\0'; /* terminate */ + *cp = s + 1; + break; + + default: + return NULL; + } + + return old; +} + +char * +cleanhostname(char *host) +{ + if (*host == '[' && host[strlen(host) - 1] == ']') { + host[strlen(host) - 1] = '\0'; + return (host + 1); + } else + return host; +} + +char * +colon(char *cp) +{ + int flag = 0; + + if (*cp == ':') /* Leading colon is part of file name. */ + return NULL; + if (*cp == '[') + flag = 1; + + for (; *cp; ++cp) { + if (*cp == '@' && *(cp+1) == '[') + flag = 1; + if (*cp == ']' && *(cp+1) == ':' && flag) + return (cp+1); + if (*cp == ':' && !flag) + return (cp); + if (*cp == '/') + return NULL; + } + return NULL; +} + +/* function to assist building execv() arguments */ +void +addargs(arglist *args, char *fmt, ...) +{ + va_list ap; + char *cp; + u_int nalloc; + int r; + + va_start(ap, fmt); + r = vasprintf(&cp, fmt, ap); + va_end(ap); + if (r == -1) + fatal("addargs: argument too long"); + + nalloc = args->nalloc; + if (args->list == NULL) { + nalloc = 32; + args->num = 0; + } else if (args->num+2 >= nalloc) + nalloc *= 2; + + args->list = xreallocarray(args->list, nalloc, sizeof(char *)); + args->nalloc = nalloc; + args->list[args->num++] = cp; + args->list[args->num] = NULL; +} + +void +replacearg(arglist *args, u_int which, char *fmt, ...) +{ + va_list ap; + char *cp; + int r; + + va_start(ap, fmt); + r = vasprintf(&cp, fmt, ap); + va_end(ap); + if (r == -1) + fatal("replacearg: argument too long"); + + if (which >= args->num) + fatal("replacearg: tried to replace invalid arg %d >= %d", + which, args->num); + free(args->list[which]); + args->list[which] = cp; +} + +void +freeargs(arglist *args) +{ + u_int i; + + if (args->list != NULL) { + for (i = 0; i < args->num; i++) + free(args->list[i]); + free(args->list); + args->nalloc = args->num = 0; + args->list = NULL; + } +} + +/* + * Expands tildes in the file name. Returns data allocated by xmalloc. + * Warning: this calls getpw*. + */ +char * +tilde_expand_filename(const char *filename, uid_t uid) +{ + const char *path, *sep; + char user[128], *ret; + struct passwd *pw; + u_int len, slash; + + if (*filename != '~') + return (xstrdup(filename)); + filename++; + + path = strchr(filename, '/'); + if (path != NULL && path > filename) { /* ~user/path */ + slash = path - filename; + if (slash > sizeof(user) - 1) + fatal("tilde_expand_filename: ~username too long"); + memcpy(user, filename, slash); + user[slash] = '\0'; + if ((pw = getpwnam(user)) == NULL) + fatal("tilde_expand_filename: No such user %s", user); + } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */ + fatal("tilde_expand_filename: No such uid %ld", (long)uid); + +#ifdef WIN32_FIXME + + // + // Catch case when, homedir is unknown or doesn't exist + // e.g. for SYSTEM user. Then, redirect path to NUL. + // + + if (wcslen(pw -> pw_dir) == 0) + { + snprintf(ret, sizeof(ret), "NUL"); + } + + else if (/*snprintf(ret, sizeof(ret), "%ls", pw -> pw_dir) <= 0*/ 1) +#else + if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret)) +#endif + /* Make sure directory has a trailing '/' */ +#ifdef WIN32_FIXME + len = strlen(ret); + if ((len == 0 || ret[len - 1] != '/') && + strlcat(ret, "/", sizeof(ret)) >= sizeof(ret)) +#else + len = strlen(pw->pw_dir); + if (len == 0 || pw->pw_dir[len - 1] != '/') + sep = "/"; + else + sep = ""; +#endif + + /* Skip leading '/' from specified path */ + if (path != NULL) + filename = path + 1; + + if (xasprintf(&ret, "%s%s%s", pw->pw_dir, sep, filename) >= PATH_MAX) + fatal("tilde_expand_filename: Path too long"); + + return (ret); +} + +/* + * Expand a string with a set of %[char] escapes. A number of escapes may be + * specified as (char *escape_chars, char *replacement) pairs. The list must + * be terminated by a NULL escape_char. Returns replaced string in memory + * allocated by xmalloc. + */ +char * +percent_expand(const char *string, ...) +{ +#define EXPAND_MAX_KEYS 16 + u_int num_keys, i, j; + struct { + const char *key; + const char *repl; + } keys[EXPAND_MAX_KEYS]; + char buf[4096]; + va_list ap; + + /* Gather keys */ + va_start(ap, string); + for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) { + keys[num_keys].key = va_arg(ap, char *); + if (keys[num_keys].key == NULL) + break; + keys[num_keys].repl = va_arg(ap, char *); + if (keys[num_keys].repl == NULL) + fatal("%s: NULL replacement", __func__); + } + if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, char *) != NULL) + fatal("%s: too many keys", __func__); + va_end(ap); + + /* Expand string */ + *buf = '\0'; + for (i = 0; *string != '\0'; string++) { + if (*string != '%') { + append: + buf[i++] = *string; + if (i >= sizeof(buf)) + fatal("%s: string too long", __func__); + buf[i] = '\0'; + continue; + } + string++; + /* %% case */ + if (*string == '%') + goto append; + for (j = 0; j < num_keys; j++) { + if (strchr(keys[j].key, *string) != NULL) { + i = strlcat(buf, keys[j].repl, sizeof(buf)); + if (i >= sizeof(buf)) + fatal("%s: string too long", __func__); + break; + } + } + if (j >= num_keys) + fatal("%s: unknown key %%%c", __func__, *string); + } + return (xstrdup(buf)); +#undef EXPAND_MAX_KEYS +} + +#ifdef WIN32_FIXME +wchar_t *percent_expand_w(const wchar_t *string, ...) +{ +#define EXPAND_MAX_KEYS 16 + u_int num_keys, i, j; + struct { + const wchar_t *key; + const wchar_t *repl; + } keys[EXPAND_MAX_KEYS]; + wchar_t buf[4096]; + va_list ap; + + /* Gather keys */ + va_start(ap, string); + for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) { + keys[num_keys].key = va_arg(ap, wchar_t *); + if (keys[num_keys].key == NULL) + break; + keys[num_keys].repl = va_arg(ap, wchar_t *); + if (keys[num_keys].repl == NULL) + fatal("%s: NULL replacement", __func__); + } + if (num_keys == EXPAND_MAX_KEYS && va_arg(ap, wchar_t *) != NULL) + fatal("%s: too many keys", __func__); + va_end(ap); + + /* Expand string */ + *buf = L'\0'; + for (i = 0; *string != L'\0'; string++) { + if (*string != L'%') { + append: + buf[i++] = *string; + if (i >= sizeof(buf)) + fatal("%s: string too long", __func__); + buf[i] = L'\0'; + continue; + } + string++; + /* %% case */ + if (*string == L'%') + goto append; + for (j = 0; j < num_keys; j++) { + if (wcschr(keys[j].key, *string) != NULL) { + i = wcsncat(buf, keys[j].repl, sizeof(buf)); + buf[sizeof(buf)-1] = 0; + if (i >= sizeof(buf)) + fatal("%s: string too long", __func__); + break; + } + } + if (j >= num_keys) + fatal("%s: unknown key %%%c", __func__, *string); + } + return (_wcsdup(buf)); +#undef EXPAND_MAX_KEYS +} +#endif +/* + * Read an entire line from a public key file into a static buffer, discarding + * lines that exceed the buffer size. Returns 0 on success, -1 on failure. + */ +int +read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz, + u_long *lineno) +{ + while (fgets(buf, bufsz, f) != NULL) { + if (buf[0] == '\0') + continue; + (*lineno)++; + if (buf[strlen(buf) - 1] == '\n' || feof(f)) { + return 0; + } else { + debug("%s: %s line %lu exceeds size limit", __func__, + filename, *lineno); + /* discard remainder of line */ + while (fgetc(f) != '\n' && !feof(f)) + ; /* nothing */ + } + } + return -1; +} + +int +tun_open(int tun, int mode) +{ +#if defined(CUSTOM_SYS_TUN_OPEN) + return (sys_tun_open(tun, mode)); +#elif defined(SSH_TUN_OPENBSD) + struct ifreq ifr; + char name[100]; + int fd = -1, sock; + + /* Open the tunnel device */ + if (tun <= SSH_TUNID_MAX) { + snprintf(name, sizeof(name), "/dev/tun%d", tun); + fd = open(name, O_RDWR); + } else if (tun == SSH_TUNID_ANY) { + for (tun = 100; tun >= 0; tun--) { + snprintf(name, sizeof(name), "/dev/tun%d", tun); + if ((fd = open(name, O_RDWR)) >= 0) + break; + } + } else { + debug("%s: invalid tunnel %u", __func__, tun); + return (-1); + } + + if (fd < 0) { + debug("%s: %s open failed: %s", __func__, name, strerror(errno)); + return (-1); + } + + debug("%s: %s mode %d fd %d", __func__, name, mode, fd); + + /* Set the tunnel device operation mode */ + snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun); + if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1) + goto failed; + + if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1) + goto failed; + + /* Set interface mode */ + ifr.ifr_flags &= ~IFF_UP; + if (mode == SSH_TUNMODE_ETHERNET) + ifr.ifr_flags |= IFF_LINK0; + else + ifr.ifr_flags &= ~IFF_LINK0; + if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) + goto failed; + + /* Bring interface up */ + ifr.ifr_flags |= IFF_UP; + if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1) + goto failed; + + close(sock); + return (fd); + + failed: + if (fd >= 0) + close(fd); + if (sock >= 0) + close(sock); + debug("%s: failed to set %s mode %d: %s", __func__, name, + mode, strerror(errno)); + return (-1); +#else + error("Tunnel interfaces are not supported on this platform"); + return (-1); +#endif +} + +void +sanitise_stdfd(void) +{ +#ifndef WIN32_FIXME + int nullfd, dupfd; + + if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) { + fprintf(stderr, "Couldn't open /dev/null: %s\n", + strerror(errno)); + exit(1); + } + while (++dupfd <= 2) { + /* Only clobber closed fds */ + if (fcntl(dupfd, F_GETFL, 0) >= 0) + continue; + if (dup2(nullfd, dupfd) == -1) { + fprintf(stderr, "dup2: %s\n", strerror(errno)); + exit(1); + } + } + if (nullfd > 2) + close(nullfd); +#endif +} + +char * +tohex(const void *vp, size_t l) +{ + const u_char *p = (const u_char *)vp; + char b[3], *r; + size_t i, hl; + + if (l > 65536) + return xstrdup("tohex: length > 65536"); + + hl = l * 2 + 1; + r = xcalloc(1, hl); + for (i = 0; i < l; i++) { + snprintf(b, sizeof(b), "%02x", p[i]); + strlcat(r, b, hl); + } + return (r); +} + +u_int64_t +get_u64(const void *vp) +{ + const u_char *p = (const u_char *)vp; + u_int64_t v; + + v = (u_int64_t)p[0] << 56; + v |= (u_int64_t)p[1] << 48; + v |= (u_int64_t)p[2] << 40; + v |= (u_int64_t)p[3] << 32; + v |= (u_int64_t)p[4] << 24; + v |= (u_int64_t)p[5] << 16; + v |= (u_int64_t)p[6] << 8; + v |= (u_int64_t)p[7]; + + return (v); +} + +u_int32_t +get_u32(const void *vp) +{ + const u_char *p = (const u_char *)vp; + u_int32_t v; + + v = (u_int32_t)p[0] << 24; + v |= (u_int32_t)p[1] << 16; + v |= (u_int32_t)p[2] << 8; + v |= (u_int32_t)p[3]; + + return (v); +} + +u_int32_t +get_u32_le(const void *vp) +{ + const u_char *p = (const u_char *)vp; + u_int32_t v; + + v = (u_int32_t)p[0]; + v |= (u_int32_t)p[1] << 8; + v |= (u_int32_t)p[2] << 16; + v |= (u_int32_t)p[3] << 24; + + return (v); +} + +u_int16_t +get_u16(const void *vp) +{ + const u_char *p = (const u_char *)vp; + u_int16_t v; + + v = (u_int16_t)p[0] << 8; + v |= (u_int16_t)p[1]; + + return (v); +} + +void +put_u64(void *vp, u_int64_t v) +{ + u_char *p = (u_char *)vp; + + p[0] = (u_char)(v >> 56) & 0xff; + p[1] = (u_char)(v >> 48) & 0xff; + p[2] = (u_char)(v >> 40) & 0xff; + p[3] = (u_char)(v >> 32) & 0xff; + p[4] = (u_char)(v >> 24) & 0xff; + p[5] = (u_char)(v >> 16) & 0xff; + p[6] = (u_char)(v >> 8) & 0xff; + p[7] = (u_char)v & 0xff; +} + +void +put_u32(void *vp, u_int32_t v) +{ + u_char *p = (u_char *)vp; + + p[0] = (u_char)(v >> 24) & 0xff; + p[1] = (u_char)(v >> 16) & 0xff; + p[2] = (u_char)(v >> 8) & 0xff; + p[3] = (u_char)v & 0xff; +} + +void +put_u32_le(void *vp, u_int32_t v) +{ + u_char *p = (u_char *)vp; + + p[0] = (u_char)v & 0xff; + p[1] = (u_char)(v >> 8) & 0xff; + p[2] = (u_char)(v >> 16) & 0xff; + p[3] = (u_char)(v >> 24) & 0xff; +} + +void +put_u16(void *vp, u_int16_t v) +{ + u_char *p = (u_char *)vp; + + p[0] = (u_char)(v >> 8) & 0xff; + p[1] = (u_char)v & 0xff; +} + +void +ms_subtract_diff(struct timeval *start, int *ms) +{ + struct timeval diff, finish; + + gettimeofday(&finish, NULL); + timersub(&finish, start, &diff); + *ms -= (diff.tv_sec * 1000) + (diff.tv_usec / 1000); +} + +void +ms_to_timeval(struct timeval *tv, int ms) +{ + if (ms < 0) + ms = 0; + tv->tv_sec = ms / 1000; + tv->tv_usec = (ms % 1000) * 1000; +} + +time_t +monotime(void) +{ +#if defined(HAVE_CLOCK_GETTIME) && \ + (defined(CLOCK_MONOTONIC) || defined(CLOCK_BOOTTIME)) + struct timespec ts; + static int gettime_failed = 0; + + if (!gettime_failed) { +#if defined(CLOCK_BOOTTIME) + if (clock_gettime(CLOCK_BOOTTIME, &ts) == 0) + return (ts.tv_sec); +#endif +#if defined(CLOCK_MONOTONIC) + if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) + return (ts.tv_sec); +#endif + debug3("clock_gettime: %s", strerror(errno)); + gettime_failed = 1; + } +#endif /* HAVE_CLOCK_GETTIME && (CLOCK_MONOTONIC || CLOCK_BOOTTIME */ + + return time(NULL); +} + +void +bandwidth_limit_init(struct bwlimit *bw, u_int64_t kbps, size_t buflen) +{ + bw->buflen = buflen; + bw->rate = kbps; + bw->thresh = bw->rate; + bw->lamt = 0; + timerclear(&bw->bwstart); + timerclear(&bw->bwend); +} + +/* Callback from read/write loop to insert bandwidth-limiting delays */ +void +bandwidth_limit(struct bwlimit *bw, size_t read_len) +{ +#ifndef WIN32_FIXME + u_int64_t waitlen; + struct timespec ts, rm; + + if (!timerisset(&bw->bwstart)) { + gettimeofday(&bw->bwstart, NULL); + return; + } + + bw->lamt += read_len; + if (bw->lamt < bw->thresh) + return; + + gettimeofday(&bw->bwend, NULL); + timersub(&bw->bwend, &bw->bwstart, &bw->bwend); + if (!timerisset(&bw->bwend)) + return; + + bw->lamt *= 8; + waitlen = (double)1000000L * bw->lamt / bw->rate; + + bw->bwstart.tv_sec = waitlen / 1000000L; + bw->bwstart.tv_usec = waitlen % 1000000L; + + if (timercmp(&bw->bwstart, &bw->bwend, >)) { + timersub(&bw->bwstart, &bw->bwend, &bw->bwend); + + /* Adjust the wait time */ + if (bw->bwend.tv_sec) { + bw->thresh /= 2; + if (bw->thresh < bw->buflen / 4) + bw->thresh = bw->buflen / 4; + } else if (bw->bwend.tv_usec < 10000) { + bw->thresh *= 2; + if (bw->thresh > bw->buflen * 8) + bw->thresh = bw->buflen * 8; + } + + TIMEVAL_TO_TIMESPEC(&bw->bwend, &ts); + while (nanosleep(&ts, &rm) == -1) { + if (errno != EINTR) + break; + ts = rm; + } + } + + bw->lamt = 0; + gettimeofday(&bw->bwstart, NULL); +#endif +} + +/* Make a template filename for mk[sd]temp() */ +void +mktemp_proto(char *s, size_t len) +{ + const char *tmpdir; + int r; + + if ((tmpdir = getenv("TMPDIR")) != NULL) { + r = snprintf(s, len, "%s/ssh-XXXXXXXXXXXX", tmpdir); + if (r > 0 && (size_t)r < len) + return; + } + r = snprintf(s, len, "/tmp/ssh-XXXXXXXXXXXX"); + if (r < 0 || (size_t)r >= len) + fatal("%s: template string too short", __func__); +} + +static const struct { + const char *name; + int value; +} ipqos[] = { + { "af11", IPTOS_DSCP_AF11 }, + { "af12", IPTOS_DSCP_AF12 }, + { "af13", IPTOS_DSCP_AF13 }, + { "af21", IPTOS_DSCP_AF21 }, + { "af22", IPTOS_DSCP_AF22 }, + { "af23", IPTOS_DSCP_AF23 }, + { "af31", IPTOS_DSCP_AF31 }, + { "af32", IPTOS_DSCP_AF32 }, + { "af33", IPTOS_DSCP_AF33 }, + { "af41", IPTOS_DSCP_AF41 }, + { "af42", IPTOS_DSCP_AF42 }, + { "af43", IPTOS_DSCP_AF43 }, + { "cs0", IPTOS_DSCP_CS0 }, + { "cs1", IPTOS_DSCP_CS1 }, + { "cs2", IPTOS_DSCP_CS2 }, + { "cs3", IPTOS_DSCP_CS3 }, + { "cs4", IPTOS_DSCP_CS4 }, + { "cs5", IPTOS_DSCP_CS5 }, + { "cs6", IPTOS_DSCP_CS6 }, + { "cs7", IPTOS_DSCP_CS7 }, + { "ef", IPTOS_DSCP_EF }, + { "lowdelay", IPTOS_LOWDELAY }, + { "throughput", IPTOS_THROUGHPUT }, + { "reliability", IPTOS_RELIABILITY }, + { NULL, -1 } +}; + +int +parse_ipqos(const char *cp) +{ + u_int i; + char *ep; + long val; + + if (cp == NULL) + return -1; + for (i = 0; ipqos[i].name != NULL; i++) { + if (strcasecmp(cp, ipqos[i].name) == 0) + return ipqos[i].value; + } + /* Try parsing as an integer */ + val = strtol(cp, &ep, 0); + if (*cp == '\0' || *ep != '\0' || val < 0 || val > 255) + return -1; + return val; +} + +const char * +iptos2str(int iptos) +{ + int i; + static char iptos_str[sizeof "0xff"]; + + for (i = 0; ipqos[i].name != NULL; i++) { + if (ipqos[i].value == iptos) + return ipqos[i].name; + } + snprintf(iptos_str, sizeof iptos_str, "0x%02x", iptos); + return iptos_str; +} + +void +lowercase(char *s) +{ + for (; *s; s++) + *s = tolower((u_char)*s); +} + +int +unix_listener(const char *path, int backlog, int unlink_first) +{ + struct sockaddr_un sunaddr; + int saved_errno, sock; + + memset(&sunaddr, 0, sizeof(sunaddr)); + sunaddr.sun_family = AF_UNIX; + if (strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)) >= sizeof(sunaddr.sun_path)) { + error("%s: \"%s\" too long for Unix domain socket", __func__, + path); + errno = ENAMETOOLONG; + return -1; + } + + sock = socket(PF_UNIX, SOCK_STREAM, 0); + if (sock < 0) { + saved_errno = errno; + error("socket: %.100s", strerror(errno)); + errno = saved_errno; + return -1; + } + if (unlink_first == 1) { + if (unlink(path) != 0 && errno != ENOENT) + error("unlink(%s): %.100s", path, strerror(errno)); + } + if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) { + saved_errno = errno; + error("bind: %.100s", strerror(errno)); + close(sock); + error("%s: cannot bind to path: %s", __func__, path); + errno = saved_errno; + return -1; + } + if (listen(sock, backlog) < 0) { + saved_errno = errno; + error("listen: %.100s", strerror(errno)); + close(sock); + unlink(path); + error("%s: cannot listen on path: %s", __func__, path); + errno = saved_errno; + return -1; + } + return sock; +} + +void +sock_set_v6only(int s) +{ +#ifdef IPV6_V6ONLY + int on = 1; + + debug3("%s: set socket %d IPV6_V6ONLY", __func__, s); + if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) == -1) + error("setsockopt IPV6_V6ONLY: %s", strerror(errno)); +#endif +} diff --git a/misc.h b/misc.h index 62ed799..764cc5a 100644 --- a/misc.h +++ b/misc.h @@ -1,4 +1,4 @@ -/* $OpenBSD: misc.h,v 1.48 2011/03/29 18:54:17 stevesk Exp $ */ +/* $OpenBSD: misc.h,v 1.54 2014/07/15 15:54:14 millert Exp $ */ /* * Author: Tatu Ylonen @@ -15,6 +15,25 @@ #ifndef _MISC_H #define _MISC_H +/* Data structure for representing a forwarding request. */ +struct Forward { + char *listen_host; /* Host (address) to listen on. */ + int listen_port; /* Port to forward. */ + char *listen_path; /* Path to bind domain socket. */ + char *connect_host; /* Host to connect. */ + int connect_port; /* Port to connect on connect_host. */ + char *connect_path; /* Path to connect domain socket. */ + int allocated_port; /* Dynamically allocated listen port */ + int handle; /* Handle for dynamic listen ports */ +}; + +/* Common server and client forwarding options. */ +struct ForwardOptions { + int gateway_ports; /* Allow remote connects to forwarded ports. */ + mode_t streamlocal_bind_mask; /* umask for streamlocal binds */ + int streamlocal_bind_unlink; /* unlink socket before bind */ +}; + /* misc.c */ char *chop(char *); @@ -38,6 +57,10 @@ char *tohex(const void *, size_t); void sanitise_stdfd(void); void ms_subtract_diff(struct timeval *, int *); void ms_to_timeval(struct timeval *, int); +time_t monotime(void); +void lowercase(char *s); +int unix_listener(const char *, int, int); + void sock_set_v6only(int); struct passwd *pwcopy(struct passwd *); @@ -68,6 +91,9 @@ int tun_open(int, int); #define SSH_TUNID_ERR (SSH_TUNID_ANY - 1) #define SSH_TUNID_MAX (SSH_TUNID_ANY - 2) +/* Fake port to indicate that host field is really a path. */ +#define PORT_STREAMLOCAL -2 + /* Functions to extract or store big-endian words of various sizes */ u_int64_t get_u64(const void *) __attribute__((__bounded__( __minbytes__, 1, 8))); @@ -82,6 +108,12 @@ void put_u32(void *, u_int32_t) void put_u16(void *, u_int16_t) __attribute__((__bounded__( __minbytes__, 1, 2))); +/* Little-endian store/load, used by umac.c */ +u_int32_t get_u32_le(const void *) + __attribute__((__bounded__(__minbytes__, 1, 4))); +void put_u32_le(void *, u_int32_t) + __attribute__((__bounded__(__minbytes__, 1, 4))); + struct bwlimit { size_t buflen; u_int64_t rate, thresh, lamt; diff --git a/moduli.c b/moduli.c index 2964a8b..460269e 100644 --- a/moduli.c +++ b/moduli.c @@ -1,4 +1,4 @@ -/* $OpenBSD: moduli.c,v 1.22 2010/11/10 01:33:07 djm Exp $ */ +/* $OpenBSD: moduli.c,v 1.30 2015/01/20 23:14:00 deraadt Exp $ */ /* * Copyright 1994 Phil Karn * Copyright 1996-1998, 2003 William Allen Simpson @@ -39,20 +39,27 @@ #include "includes.h" +#ifdef WITH_OPENSSL + +#include /* MAX */ #include #include #include +#include #include #include #include #include #include +#include +#include #include "xmalloc.h" #include "dh.h" #include "log.h" +#include "misc.h" #include "openbsd-compat/openssl-compat.h" @@ -137,7 +144,8 @@ static u_int32_t largebits, largememory; /* megabytes */ static BIGNUM *largebase; int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); -int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); +int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, + unsigned long); /* * print moduli out in consistent form, @@ -429,15 +437,138 @@ gen_candidates(FILE *out, u_int32_t memory, u_int32_t power, BIGNUM *start) time(&time_stop); - xfree(LargeSieve); - xfree(SmallSieve); - xfree(TinySieve); + free(LargeSieve); + free(SmallSieve); + free(TinySieve); logit("%.24s Found %u candidates", ctime(&time_stop), r); return (ret); } +static void +write_checkpoint(char *cpfile, u_int32_t lineno) +{ + FILE *fp; + char tmp[PATH_MAX]; + int r; + + r = snprintf(tmp, sizeof(tmp), "%s.XXXXXXXXXX", cpfile); + if (r == -1 || r >= PATH_MAX) { + logit("write_checkpoint: temp pathname too long"); + return; + } +#ifndef WIN32_FIXME +//PRAGMA:TODO + if ((r = mkstemp(tmp)) == -1) { + logit("mkstemp(%s): %s", tmp, strerror(errno)); + return; + } +#endif + if ((fp = fdopen(r, "w")) == NULL) { + logit("write_checkpoint: fdopen: %s", strerror(errno)); + unlink(tmp); + close(r); + return; + } + if (fprintf(fp, "%lu\n", (unsigned long)lineno) > 0 && fclose(fp) == 0 + && rename(tmp, cpfile) == 0) + debug3("wrote checkpoint line %lu to '%s'", + (unsigned long)lineno, cpfile); + else + logit("failed to write to checkpoint file '%s': %s", cpfile, + strerror(errno)); +} + +static unsigned long +read_checkpoint(char *cpfile) +{ + FILE *fp; + unsigned long lineno = 0; + + if ((fp = fopen(cpfile, "r")) == NULL) + return 0; + if (fscanf(fp, "%lu\n", &lineno) < 1) + logit("Failed to load checkpoint from '%s'", cpfile); + else + logit("Loaded checkpoint from '%s' line %lu", cpfile, lineno); + fclose(fp); + return lineno; +} + +static unsigned long +count_lines(FILE *f) +{ + unsigned long count = 0; + char lp[QLINESIZE + 1]; + + if (fseek(f, 0, SEEK_SET) != 0) { + debug("input file is not seekable"); + return ULONG_MAX; + } + while (fgets(lp, QLINESIZE + 1, f) != NULL) + count++; + rewind(f); + debug("input file has %lu lines", count); + return count; +} + +static char * +fmt_time(time_t seconds) +{ + int day, hr, min; + static char buf[128]; + + min = (seconds / 60) % 60; + hr = (seconds / 60 / 60) % 24; + day = seconds / 60 / 60 / 24; + if (day > 0) + snprintf(buf, sizeof buf, "%dd %d:%02d", day, hr, min); + else + snprintf(buf, sizeof buf, "%d:%02d", hr, min); + return buf; +} + +static void +print_progress(unsigned long start_lineno, unsigned long current_lineno, + unsigned long end_lineno) +{ + static time_t time_start, time_prev; + time_t time_now, elapsed; + unsigned long num_to_process, processed, remaining, percent, eta; + double time_per_line; + char *eta_str; + + time_now = monotime(); + if (time_start == 0) { + time_start = time_prev = time_now; + return; + } + /* print progress after 1m then once per 5m */ + if (time_now - time_prev < 5 * 60) + return; + time_prev = time_now; + elapsed = time_now - time_start; + processed = current_lineno - start_lineno; + remaining = end_lineno - current_lineno; + num_to_process = end_lineno - start_lineno; + time_per_line = (double)elapsed / processed; + /* if we don't know how many we're processing just report count+time */ + time(&time_now); + if (end_lineno == ULONG_MAX) { + logit("%.24s processed %lu in %s", ctime(&time_now), + processed, fmt_time(elapsed)); + return; + } + percent = 100 * processed / num_to_process; + eta = time_per_line * remaining; + eta_str = xstrdup(fmt_time(eta)); + logit("%.24s processed %lu of %lu (%lu%%) in %s, ETA %s", + ctime(&time_now), processed, num_to_process, percent, + fmt_time(elapsed), eta_str); + free(eta_str); +} + /* * perform a Miller-Rabin primality test * on the list of candidates @@ -445,13 +576,15 @@ gen_candidates(FILE *out, u_int32_t memory, u_int32_t power, BIGNUM *start) * The result is a list of so-call "safe" primes */ int -prime_test(FILE *in, FILE *out, u_int32_t trials, u_int32_t generator_wanted) +prime_test(FILE *in, FILE *out, u_int32_t trials, u_int32_t generator_wanted, + char *checkpoint_file, unsigned long start_lineno, unsigned long num_lines) { BIGNUM *q, *p, *a; BN_CTX *ctx; char *cp, *lp; u_int32_t count_in = 0, count_out = 0, count_possible = 0; u_int32_t generator_known, in_tests, in_tries, in_type, in_size; + unsigned long last_processed = 0, end_lineno; time_t time_start, time_stop; int res; @@ -460,6 +593,11 @@ prime_test(FILE *in, FILE *out, u_int32_t trials, u_int32_t generator_wanted) return (-1); } + if (num_lines == 0) + end_lineno = count_lines(in); + else + end_lineno = start_lineno + num_lines; + time(&time_start); if ((p = BN_new()) == NULL) @@ -472,10 +610,27 @@ prime_test(FILE *in, FILE *out, u_int32_t trials, u_int32_t generator_wanted) debug2("%.24s Final %u Miller-Rabin trials (%x generator)", ctime(&time_start), trials, generator_wanted); + if (checkpoint_file != NULL) + last_processed = read_checkpoint(checkpoint_file); + last_processed = start_lineno = MAX(last_processed, start_lineno); + if (end_lineno == ULONG_MAX) + debug("process from line %lu from pipe", last_processed); + else + debug("process from line %lu to line %lu", last_processed, + end_lineno); + res = 0; lp = xmalloc(QLINESIZE + 1); - while (fgets(lp, QLINESIZE + 1, in) != NULL) { + while (fgets(lp, QLINESIZE + 1, in) != NULL && count_in < end_lineno) { count_in++; + if (count_in <= last_processed) { + debug3("skipping line %u, before checkpoint or " + "specified start line", count_in); + continue; + } + if (checkpoint_file != NULL) + write_checkpoint(checkpoint_file, count_in); + print_progress(start_lineno, count_in, end_lineno); if (strlen(lp) < 14 || *lp == '!' || *lp == '#') { debug2("%10u: comment or short line", count_in); continue; @@ -639,14 +794,19 @@ prime_test(FILE *in, FILE *out, u_int32_t trials, u_int32_t generator_wanted) } time(&time_stop); - xfree(lp); + free(lp); BN_free(p); BN_free(q); BN_CTX_free(ctx); + if (checkpoint_file != NULL) + unlink(checkpoint_file); + logit("%.24s Found %u safe primes of %u candidates in %ld seconds", ctime(&time_stop), count_out, count_possible, (long) (time_stop - time_start)); return (res); } + +#endif /* WITH_OPENSSL */ diff --git a/monitor.c b/monitor.c index a921393..9fa22c4 100644 --- a/monitor.c +++ b/monitor.c @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor.c,v 1.115 2011/06/23 23:35:42 djm Exp $ */ +/* $OpenBSD: monitor.c,v 1.150 2015/06/22 23:42:16 djm Exp $ */ /* * Copyright 2002 Niels Provos * Copyright 2002 Markus Friedl @@ -37,7 +37,6 @@ #endif #include -#include #include #include "openbsd-compat/sys-tree.h" #include @@ -49,9 +48,13 @@ #endif #include #include -#include +#ifdef HAVE_STDINT_H +#include +#endif #include #include +#include +#include #include #ifdef HAVE_POLL_H #include @@ -65,7 +68,9 @@ #include #endif +#ifdef WITH_OPENSSL #include +#endif #include "openbsd-compat/sys-queue.h" #include "atomicio.h" @@ -93,6 +98,7 @@ #include "sshlogin.h" #include "canohost.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "monitor.h" #include "monitor_mm.h" @@ -101,11 +107,12 @@ #endif #include "monitor_wrap.h" #include "monitor_fdpass.h" -#include "misc.h" #include "compat.h" #include "ssh2.h" -#include "jpake.h" #include "roaming.h" +#include "authfd.h" +#include "match.h" +#include "ssherr.h" #ifdef GSSAPI static Gssctxt *gsscontext = NULL; @@ -114,38 +121,13 @@ static Gssctxt *gsscontext = NULL; /* Imports */ extern ServerOptions options; extern u_int utmp_len; -extern Newkeys *current_keys[]; -extern z_stream incoming_stream; -extern z_stream outgoing_stream; extern u_char session_id[]; extern Buffer auth_debug; extern int auth_debug_init; extern Buffer loginmsg; /* State exported from the child */ - -struct { - z_stream incoming; - z_stream outgoing; - u_char *keyin; - u_int keyinlen; - u_char *keyout; - u_int keyoutlen; - u_char *ivin; - u_int ivinlen; - u_char *ivout; - u_int ivoutlen; - u_char *ssh1key; - u_int ssh1keylen; - int ssh1cipher; - int ssh1protoflags; - u_char *input; - u_int ilen; - u_char *output; - u_int olen; - u_int64_t sent_bytes; - u_int64_t recv_bytes; -} child_state; +static struct sshbuf *child_state; /* Functions on the monitor that answer unprivileged requests */ @@ -169,11 +151,6 @@ int mm_answer_rsa_challenge(int, Buffer *); int mm_answer_rsa_response(int, Buffer *); int mm_answer_sesskey(int, Buffer *); int mm_answer_sessid(int, Buffer *); -int mm_answer_jpake_get_pwdata(int, Buffer *); -int mm_answer_jpake_step1(int, Buffer *); -int mm_answer_jpake_step2(int, Buffer *); -int mm_answer_jpake_key_confirm(int, Buffer *); -int mm_answer_jpake_check_confirm(int, Buffer *); #ifdef USE_PAM int mm_answer_pam_start(int, Buffer *); @@ -199,7 +176,10 @@ int mm_answer_audit_command(int, Buffer *); static int monitor_read_log(struct monitor *); static Authctxt *authctxt; + +#ifdef WITH_SSH1 static BIGNUM *ssh1_challenge = NULL; /* used for ssh1 rsa auth */ +#endif /* local state for key verify */ static u_char *key_blob = NULL; @@ -208,6 +188,7 @@ static int key_blobtype = MM_NOKEY; static char *hostbased_cuser = NULL; static char *hostbased_chost = NULL; static char *auth_method = "unknown"; +static char *auth_submethod = NULL; static u_int session_id2_len = 0; static u_char *session_id2 = NULL; static pid_t monitor_child_pid; @@ -228,7 +209,9 @@ struct mon_table { #define MON_PERMIT 0x1000 /* Request is permitted */ struct mon_table mon_dispatch_proto20[] = { +#ifdef WITH_OPENSSL {MONITOR_REQ_MODULI, MON_ONCE, mm_answer_moduli}, +#endif {MONITOR_REQ_SIGN, MON_ONCE, mm_answer_sign}, {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow}, {MONITOR_REQ_AUTHSERV, MON_ONCE, mm_answer_authserv}, @@ -260,19 +243,14 @@ struct mon_table mon_dispatch_proto20[] = { {MONITOR_REQ_GSSSTEP, MON_ISAUTH, mm_answer_gss_accept_ctx}, {MONITOR_REQ_GSSUSEROK, MON_AUTH, mm_answer_gss_userok}, {MONITOR_REQ_GSSCHECKMIC, MON_ISAUTH, mm_answer_gss_checkmic}, -#endif -#ifdef JPAKE - {MONITOR_REQ_JPAKE_GET_PWDATA, MON_ONCE, mm_answer_jpake_get_pwdata}, - {MONITOR_REQ_JPAKE_STEP1, MON_ISAUTH, mm_answer_jpake_step1}, - {MONITOR_REQ_JPAKE_STEP2, MON_ONCE, mm_answer_jpake_step2}, - {MONITOR_REQ_JPAKE_KEY_CONFIRM, MON_ONCE, mm_answer_jpake_key_confirm}, - {MONITOR_REQ_JPAKE_CHECK_CONFIRM, MON_AUTH, mm_answer_jpake_check_confirm}, #endif {0, 0, NULL} }; struct mon_table mon_dispatch_postauth20[] = { +#ifdef WITH_OPENSSL {MONITOR_REQ_MODULI, 0, mm_answer_moduli}, +#endif {MONITOR_REQ_SIGN, 0, mm_answer_sign}, {MONITOR_REQ_PTY, 0, mm_answer_pty}, {MONITOR_REQ_PTYCLEANUP, 0, mm_answer_pty_cleanup}, @@ -285,6 +263,7 @@ struct mon_table mon_dispatch_postauth20[] = { }; struct mon_table mon_dispatch_proto15[] = { +#ifdef WITH_SSH1 {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow}, {MONITOR_REQ_SESSKEY, MON_ONCE, mm_answer_sesskey}, {MONITOR_REQ_SESSID, MON_ONCE, mm_answer_sessid}, @@ -312,10 +291,12 @@ struct mon_table mon_dispatch_proto15[] = { #ifdef SSH_AUDIT_EVENTS {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event}, #endif +#endif /* WITH_SSH1 */ {0, 0, NULL} }; struct mon_table mon_dispatch_postauth15[] = { +#ifdef WITH_SSH1 {MONITOR_REQ_PTY, MON_ONCE, mm_answer_pty}, {MONITOR_REQ_PTYCLEANUP, MON_ONCE, mm_answer_pty_cleanup}, {MONITOR_REQ_TERM, 0, mm_answer_term}, @@ -323,6 +304,7 @@ struct mon_table mon_dispatch_postauth15[] = { {MONITOR_REQ_AUDIT_EVENT, MON_PERMIT, mm_answer_audit_event}, {MONITOR_REQ_AUDIT_COMMAND, MON_PERMIT|MON_ONCE, mm_answer_audit_command}, #endif +#endif /* WITH_SSH1 */ {0, 0, NULL} }; @@ -361,7 +343,7 @@ void monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) { struct mon_table *ent; - int authenticated = 0; + int authenticated = 0, partial = 0; debug3("preauth child monitor started"); @@ -388,8 +370,26 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) /* The first few requests do not require asynchronous access */ while (!authenticated) { + partial = 0; auth_method = "unknown"; + auth_submethod = NULL; authenticated = (monitor_read(pmonitor, mon_dispatch, &ent) == 1); + + /* Special handling for multiple required authentications */ + if (options.num_auth_methods != 0) { + if (!compat20) + fatal("AuthenticationMethods is not supported" + "with SSH protocol 1"); + if (authenticated && + !auth2_update_methods_lists(authctxt, + auth_method, auth_submethod)) { + debug3("%s: method %s: partial", __func__, + auth_method); + authenticated = 0; + partial = 1; + } + } + if (authenticated) { if (!(ent->flags & MON_AUTHDECIDE)) fatal("%s: unexpected authentication from %d", @@ -410,28 +410,14 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) } #endif } - if (ent->flags & (MON_AUTHDECIDE|MON_ALOG)) { - auth_log(authctxt, authenticated, auth_method, - compat20 ? " ssh2" : ""); - if (!authenticated) + auth_log(authctxt, authenticated, partial, + auth_method, auth_submethod); + if (!partial && !authenticated) authctxt->failures++; } -#ifdef JPAKE - /* Cleanup JPAKE context after authentication */ - if (ent->flags & MON_AUTHDECIDE) { - if (authctxt->jpake_ctx != NULL) { - jpake_free(authctxt->jpake_ctx); - authctxt->jpake_ctx = NULL; - } - } -#endif } - /* Drain any buffered messages from the child */ - while (pmonitor->m_log_recvfd != -1 && monitor_read_log(pmonitor) == 0) - ; - if (!authctxt->valid) fatal("%s: authenticated invalid user", __func__); if (strcmp(auth_method, "unknown") == 0) @@ -442,6 +428,10 @@ monitor_child_preauth(Authctxt *_authctxt, struct monitor *pmonitor) mm_get_keystate(pmonitor); + /* Drain any buffered messages from the child */ + while (pmonitor->m_log_recvfd != -1 && monitor_read_log(pmonitor) == 0) + ; + close(pmonitor->m_sendfd); close(pmonitor->m_log_recvfd); pmonitor->m_sendfd = pmonitor->m_log_recvfd = -1; @@ -471,6 +461,9 @@ monitor_child_postauth(struct monitor *pmonitor) signal(SIGHUP, &monitor_child_handler); signal(SIGTERM, &monitor_child_handler); signal(SIGINT, &monitor_child_handler); +#ifdef SIGXFSZ + signal(SIGXFSZ, SIG_IGN); +#endif if (compat20) { mon_dispatch = mon_dispatch_postauth20; @@ -490,9 +483,6 @@ monitor_child_postauth(struct monitor *pmonitor) for (;;) monitor_read(pmonitor, mon_dispatch, NULL); - - close(pmonitor->m_sendfd); - pmonitor->m_sendfd = -1; } void @@ -504,6 +494,27 @@ monitor_sync(struct monitor *pmonitor) } } +/* Allocation functions for zlib */ +static void * +mm_zalloc(struct mm_master *mm, u_int ncount, u_int size) +{ + size_t len = (size_t) size * ncount; + void *address; + + if (len == 0 || ncount > SIZE_MAX / size) + fatal("%s: mm_zalloc(%u, %u)", __func__, ncount, size); + + address = mm_malloc(mm, len); + + return (address); +} + +static void +mm_zfree(struct mm_master *mm, void *address) +{ + mm_free(mm, address); +} + static int monitor_read_log(struct monitor *pmonitor) { @@ -518,6 +529,7 @@ monitor_read_log(struct monitor *pmonitor) if (atomicio(read, pmonitor->m_log_recvfd, buffer_ptr(&logmsg), buffer_len(&logmsg)) != buffer_len(&logmsg)) { if (errno == EPIPE) { + buffer_free(&logmsg); debug("%s: child log fd closed", __func__); close(pmonitor->m_log_recvfd); pmonitor->m_log_recvfd = -1; @@ -545,7 +557,7 @@ monitor_read_log(struct monitor *pmonitor) do_log2(level, "%s [preauth]", msg); buffer_free(&logmsg); - xfree(msg); + free(msg); return 0; } @@ -560,7 +572,7 @@ monitor_read(struct monitor *pmonitor, struct mon_table *ent, struct pollfd pfd[2]; for (;;) { - bzero(&pfd, sizeof(pfd)); + memset(&pfd, 0, sizeof(pfd)); pfd[0].fd = pmonitor->m_sendfd; pfd[0].events = POLLIN; pfd[1].fd = pmonitor->m_log_recvfd; @@ -636,12 +648,9 @@ static void monitor_reset_key_state(void) { /* reset state */ - if (key_blob != NULL) - xfree(key_blob); - if (hostbased_cuser != NULL) - xfree(hostbased_cuser); - if (hostbased_chost != NULL) - xfree(hostbased_chost); + free(key_blob); + free(hostbased_cuser); + free(hostbased_chost); key_blob = NULL; key_bloblen = 0; key_blobtype = MM_NOKEY; @@ -649,6 +658,7 @@ monitor_reset_key_state(void) hostbased_chost = NULL; } +#ifdef WITH_OPENSSL int mm_answer_moduli(int sock, Buffer *m) { @@ -683,27 +693,62 @@ mm_answer_moduli(int sock, Buffer *m) mm_request_send(sock, MONITOR_ANS_MODULI, m); return (0); } +#endif int mm_answer_sign(int sock, Buffer *m) { - Key *key; + struct ssh *ssh = active_state; /* XXX */ + extern int auth_sock; /* XXX move to state struct? */ + struct sshkey *key; + struct sshbuf *sigbuf; u_char *p; u_char *signature; - u_int siglen, datlen; - int keyid; + size_t datlen, siglen; + int r, keyid, is_proof = 0; + const char proof_req[] = "hostkeys-prove-00@openssh.com"; debug3("%s", __func__); - keyid = buffer_get_int(m); - p = buffer_get_string(m, &datlen); + if ((r = sshbuf_get_u32(m, &keyid)) != 0 || + (r = sshbuf_get_string(m, &p, &datlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); /* * Supported KEX types use SHA1 (20 bytes), SHA256 (32 bytes), * SHA384 (48 bytes) and SHA512 (64 bytes). + * + * Otherwise, verify the signature request is for a hostkey + * proof. + * + * XXX perform similar check for KEX signature requests too? + * it's not trivial, since what is signed is the hash, rather + * than the full kex structure... */ - if (datlen != 20 && datlen != 32 && datlen != 48 && datlen != 64) - fatal("%s: data length incorrect: %u", __func__, datlen); + if (datlen != 20 && datlen != 32 && datlen != 48 && datlen != 64) { + /* + * Construct expected hostkey proof and compare it to what + * the client sent us. + */ + if (session_id2_len == 0) /* hostkeys is never first */ + fatal("%s: bad data length: %zu", __func__, datlen); + if ((key = get_hostkey_public_by_index(keyid, ssh)) == NULL) + fatal("%s: no hostkey for index %d", __func__, keyid); + if ((sigbuf = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new", __func__); + if ((r = sshbuf_put_cstring(sigbuf, proof_req)) != 0 || + (r = sshbuf_put_string(sigbuf, session_id2, + session_id2_len) != 0) || + (r = sshkey_puts(key, sigbuf)) != 0) + fatal("%s: couldn't prepare private key " + "proof buffer: %s", __func__, ssh_err(r)); + if (datlen != sshbuf_len(sigbuf) || + memcmp(p, sshbuf_ptr(sigbuf), sshbuf_len(sigbuf)) != 0) + fatal("%s: bad data length: %zu, hostkey proof len %zu", + __func__, datlen, sshbuf_len(sigbuf)); + sshbuf_free(sigbuf); + is_proof = 1; + } /* save session id, it will be passed on the first call */ if (session_id2_len == 0) { @@ -712,18 +757,30 @@ mm_answer_sign(int sock, Buffer *m) memcpy(session_id2, p, session_id2_len); } - if ((key = get_hostkey_by_index(keyid)) == NULL) + if ((key = get_hostkey_by_index(keyid)) != NULL) { + if ((r = sshkey_sign(key, &signature, &siglen, p, datlen, + datafellows)) != 0) + fatal("%s: sshkey_sign failed: %s", + __func__, ssh_err(r)); + } else if ((key = get_hostkey_public_by_index(keyid, ssh)) != NULL && + auth_sock > 0) { + if ((r = ssh_agent_sign(auth_sock, key, &signature, &siglen, + p, datlen, datafellows)) != 0) { + fatal("%s: ssh_agent_sign failed: %s", + __func__, ssh_err(r)); + } + } else fatal("%s: no hostkey from index %d", __func__, keyid); - if (key_sign(key, &signature, &siglen, p, datlen) < 0) - fatal("%s: key_sign failed", __func__); - debug3("%s: signature %p(%u)", __func__, signature, siglen); + debug3("%s: %s signature %p(%zu)", __func__, + is_proof ? "KEX" : "hostkey proof", signature, siglen); - buffer_clear(m); - buffer_put_string(m, signature, siglen); + sshbuf_reset(m); + if ((r = sshbuf_put_string(m, signature, siglen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - xfree(p); - xfree(signature); + free(p); + free(signature); mm_request_send(sock, MONITOR_ANS_SIGN, m); @@ -754,7 +811,7 @@ mm_answer_pwnamallow(int sock, Buffer *m) authctxt->user = xstrdup(username); setproctitle("%s [priv]", pwent ? username : "unknown"); - xfree(username); + free(username); buffer_clear(m); @@ -772,8 +829,10 @@ mm_answer_pwnamallow(int sock, Buffer *m) buffer_put_string(m, pwent, sizeof(struct passwd)); buffer_put_cstring(m, pwent->pw_name); buffer_put_cstring(m, "*"); +#ifdef HAVE_STRUCT_PASSWD_PW_GECOS buffer_put_cstring(m, pwent->pw_gecos); -#ifdef HAVE_PW_CLASS_IN_PASSWD +#endif +#ifdef HAVE_STRUCT_PASSWD_PW_CLASS buffer_put_cstring(m, pwent->pw_class); #endif buffer_put_cstring(m, pwent->pw_dir); @@ -794,7 +853,17 @@ mm_answer_pwnamallow(int sock, Buffer *m) COPY_MATCH_STRING_OPTS(); #undef M_CP_STROPT #undef M_CP_STRARRAYOPT - + + /* Create valid auth method lists */ + if (compat20 && auth2_setup_methods_lists(authctxt) != 0) { + /* + * The monitor will continue long enough to let the child + * run to it's packet_disconnect(), but it must not allow any + * authentication to succeed. + */ + debug("%s: no valid authentication method lists", __func__); + } + debug3("%s: sending MONITOR_ANS_PWNAM: %d", __func__, allowed); mm_request_send(sock, MONITOR_ANS_PWNAM, m); @@ -822,9 +891,7 @@ int mm_answer_auth2_read_banner(int sock, Buffer *m) banner = auth2_read_banner(); buffer_put_cstring(m, banner != NULL ? banner : ""); mm_request_send(sock, MONITOR_ANS_AUTH2_READ_BANNER, m); - - if (banner != NULL) - xfree(banner); + free(banner); return (0); } @@ -840,7 +907,7 @@ mm_answer_authserv(int sock, Buffer *m) __func__, authctxt->service, authctxt->style); if (strlen(authctxt->style) == 0) { - xfree(authctxt->style); + free(authctxt->style); authctxt->style = NULL; } @@ -859,8 +926,8 @@ mm_answer_authpassword(int sock, Buffer *m) /* Only authenticate if the context is valid */ authenticated = options.password_authentication && auth_password(authctxt, passwd); - memset(passwd, 0, strlen(passwd)); - xfree(passwd); + explicit_bzero(passwd, strlen(passwd)); + free(passwd); buffer_clear(m); buffer_put_int(m, authenticated); @@ -900,10 +967,10 @@ mm_answer_bsdauthquery(int sock, Buffer *m) mm_request_send(sock, MONITOR_ANS_BSDAUTHQUERY, m); if (success) { - xfree(name); - xfree(infotxt); - xfree(prompts); - xfree(echo_on); + free(name); + free(infotxt); + free(prompts); + free(echo_on); } return (0); @@ -923,7 +990,7 @@ mm_answer_bsdauthrespond(int sock, Buffer *m) auth_userresponse(authctxt->as, response, 0); authctxt->as = NULL; debug3("%s: <%s> = <%d>", __func__, response, authok); - xfree(response); + free(response); buffer_clear(m); buffer_put_int(m, authok); @@ -931,7 +998,11 @@ mm_answer_bsdauthrespond(int sock, Buffer *m) debug3("%s: sending authenticated: %d", __func__, authok); mm_request_send(sock, MONITOR_ANS_BSDAUTHRESPOND, m); - auth_method = "bsdauth"; + if (compat20) { + auth_method = "keyboard-interactive"; + auth_submethod = "bsdauth"; + } else + auth_method = "bsdauth"; return (authok != 0); } @@ -972,7 +1043,7 @@ mm_answer_skeyrespond(int sock, Buffer *m) skey_haskey(authctxt->pw->pw_name) == 0 && skey_passcheck(authctxt->pw->pw_name, response) != -1); - xfree(response); + free(response); buffer_clear(m); buffer_put_int(m, authok); @@ -1024,9 +1095,7 @@ extern KbdintDevice sshpam_device; int mm_answer_pam_init_ctx(int sock, Buffer *m) { - debug3("%s", __func__); - authctxt->user = buffer_get_string(m, NULL); sshpam_ctxt = (sshpam_device.init_ctx)(authctxt); sshpam_authok = NULL; buffer_clear(m); @@ -1057,20 +1126,19 @@ mm_answer_pam_query(int sock, Buffer *m) buffer_clear(m); buffer_put_int(m, ret); buffer_put_cstring(m, name); - xfree(name); + free(name); buffer_put_cstring(m, info); - xfree(info); + free(info); buffer_put_int(m, num); for (i = 0; i < num; ++i) { buffer_put_cstring(m, prompts[i]); - xfree(prompts[i]); + free(prompts[i]); buffer_put_int(m, echo_on[i]); } - if (prompts != NULL) - xfree(prompts); - if (echo_on != NULL) - xfree(echo_on); - auth_method = "keyboard-interactive/pam"; + free(prompts); + free(echo_on); + auth_method = "keyboard-interactive"; + auth_submethod = "pam"; mm_request_send(sock, MONITOR_ANS_PAM_QUERY, m); return (0); } @@ -1091,15 +1159,16 @@ mm_answer_pam_respond(int sock, Buffer *m) resp[i] = buffer_get_string(m, NULL); ret = (sshpam_device.respond)(sshpam_ctxt, num, resp); for (i = 0; i < num; ++i) - xfree(resp[i]); - xfree(resp); + free(resp[i]); + free(resp); } else { ret = (sshpam_device.respond)(sshpam_ctxt, num, NULL); } buffer_clear(m); buffer_put_int(m, ret); mm_request_send(sock, MONITOR_ANS_PAM_RESPOND, m); - auth_method = "keyboard-interactive/pam"; + auth_method = "keyboard-interactive"; + auth_submethod = "pam"; if (ret == 0) sshpam_authok = sshpam_ctxt; return (0); @@ -1108,13 +1177,16 @@ mm_answer_pam_respond(int sock, Buffer *m) int mm_answer_pam_free_ctx(int sock, Buffer *m) { + int r = sshpam_authok != NULL && sshpam_authok == sshpam_ctxt; debug3("%s", __func__); (sshpam_device.free_ctx)(sshpam_ctxt); + sshpam_ctxt = sshpam_authok = NULL; buffer_clear(m); mm_request_send(sock, MONITOR_ANS_PAM_FREE_CTX, m); - auth_method = "keyboard-interactive/pam"; - return (sshpam_authok == sshpam_ctxt); + auth_method = "keyboard-interactive"; + auth_submethod = "pam"; + return r; } #endif @@ -1124,7 +1196,7 @@ mm_answer_keyallowed(int sock, Buffer *m) Key *key; char *cuser, *chost; u_char *blob; - u_int bloblen; + u_int bloblen, pubkey_auth_attempt; enum mm_keytype type = 0; int allowed = 0; @@ -1134,6 +1206,7 @@ mm_answer_keyallowed(int sock, Buffer *m) cuser = buffer_get_string(m, NULL); chost = buffer_get_string(m, NULL); blob = buffer_get_string(m, &bloblen); + pubkey_auth_attempt = buffer_get_int(m); key = key_from_blob(blob, bloblen); @@ -1144,20 +1217,37 @@ mm_answer_keyallowed(int sock, Buffer *m) debug3("%s: key_from_blob: %p", __func__, key); if (key != NULL && authctxt->valid) { + /* These should not make it past the privsep child */ + if (key_type_plain(key->type) == KEY_RSA && + (datafellows & SSH_BUG_RSASIGMD5) != 0) + fatal("%s: passed a SSH_BUG_RSASIGMD5 key", __func__); + switch (type) { case MM_USERKEY: allowed = options.pubkey_authentication && - user_key_allowed(authctxt->pw, key); + !auth2_userkey_already_used(authctxt, key) && + match_pattern_list(sshkey_ssh_name(key), + options.pubkey_key_types, 0) == 1 && + user_key_allowed(authctxt->pw, key, + pubkey_auth_attempt); + pubkey_auth_info(authctxt, key, NULL); auth_method = "publickey"; - if (options.pubkey_authentication && allowed != 1) + if (options.pubkey_authentication && + (!pubkey_auth_attempt || allowed != 1)) auth_clear_options(); break; case MM_HOSTKEY: allowed = options.hostbased_authentication && + match_pattern_list(sshkey_ssh_name(key), + options.hostbased_key_types, 0) == 1 && hostbased_key_allowed(authctxt->pw, cuser, chost, key); + pubkey_auth_info(authctxt, key, + "client user \"%.100s\", client host \"%.100s\"", + cuser, chost); auth_method = "hostbased"; break; +#ifdef WITH_SSH1 case MM_RSAHOSTKEY: key->type = KEY_RSA1; /* XXX */ allowed = options.rhosts_rsa_authentication && @@ -1167,6 +1257,7 @@ mm_answer_keyallowed(int sock, Buffer *m) auth_clear_options(); auth_method = "rsa"; break; +#endif default: fatal("%s: unknown key type %d", __func__, type); break; @@ -1187,10 +1278,10 @@ mm_answer_keyallowed(int sock, Buffer *m) hostbased_chost = chost; } else { /* Log failed attempt */ - auth_log(authctxt, 0, auth_method, compat20 ? " ssh2" : ""); - xfree(blob); - xfree(cuser); - xfree(chost); + auth_log(authctxt, 0, 0, auth_method, NULL); + free(blob); + free(cuser); + free(chost); } debug3("%s: key %p is %s", @@ -1212,7 +1303,7 @@ static int monitor_valid_userblob(u_char *data, u_int datalen) { Buffer b; - char *p; + char *p, *userstyle; u_int len; int fail = 0; @@ -1233,26 +1324,30 @@ monitor_valid_userblob(u_char *data, u_int datalen) (len != session_id2_len) || (timingsafe_bcmp(p, session_id2, session_id2_len) != 0)) fail++; - xfree(p); + free(p); } if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) fail++; - p = buffer_get_string(&b, NULL); - if (strcmp(authctxt->user, p) != 0) { + p = buffer_get_cstring(&b, NULL); + xasprintf(&userstyle, "%s%s%s", authctxt->user, + authctxt->style ? ":" : "", + authctxt->style ? authctxt->style : ""); + if (strcmp(userstyle, p) != 0) { logit("wrong user name passed to monitor: expected %s != %.100s", - authctxt->user, p); + userstyle, p); fail++; } - xfree(p); + free(userstyle); + free(p); buffer_skip_string(&b); if (datafellows & SSH_BUG_PKAUTH) { if (!buffer_get_char(&b)) fail++; } else { - p = buffer_get_string(&b, NULL); + p = buffer_get_cstring(&b, NULL); if (strcmp("publickey", p) != 0) fail++; - xfree(p); + free(p); if (!buffer_get_char(&b)) fail++; buffer_skip_string(&b); @@ -1269,7 +1364,7 @@ monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser, char *chost) { Buffer b; - char *p; + char *p, *userstyle; u_int len; int fail = 0; @@ -1281,22 +1376,26 @@ monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser, (len != session_id2_len) || (timingsafe_bcmp(p, session_id2, session_id2_len) != 0)) fail++; - xfree(p); + free(p); if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) fail++; - p = buffer_get_string(&b, NULL); - if (strcmp(authctxt->user, p) != 0) { + p = buffer_get_cstring(&b, NULL); + xasprintf(&userstyle, "%s%s%s", authctxt->user, + authctxt->style ? ":" : "", + authctxt->style ? authctxt->style : ""); + if (strcmp(userstyle, p) != 0) { logit("wrong user name passed to monitor: expected %s != %.100s", - authctxt->user, p); + userstyle, p); fail++; } - xfree(p); + free(userstyle); + free(p); buffer_skip_string(&b); /* service */ - p = buffer_get_string(&b, NULL); + p = buffer_get_cstring(&b, NULL); if (strcmp(p, "hostbased") != 0) fail++; - xfree(p); + free(p); buffer_skip_string(&b); /* pkalg */ buffer_skip_string(&b); /* pkblob */ @@ -1306,13 +1405,13 @@ monitor_valid_hostbasedblob(u_char *data, u_int datalen, char *cuser, p[len - 1] = '\0'; if (strcmp(p, chost) != 0) fail++; - xfree(p); + free(p); /* verify client user */ p = buffer_get_string(&b, NULL); if (strcmp(p, cuser) != 0) fail++; - xfree(p); + free(p); if (buffer_len(&b) != 0) fail++; @@ -1360,10 +1459,15 @@ mm_answer_keyverify(int sock, Buffer *m) debug3("%s: key %p signature %s", __func__, key, (verified == 1) ? "verified" : "unverified"); - key_free(key); - xfree(blob); - xfree(signature); - xfree(data); + /* If auth was successful then record key to ensure it isn't reused */ + if (verified == 1) + auth2_record_userkey(authctxt, key); + else + key_free(key); + + free(blob); + free(signature); + free(data); auth_method = key_blobtype == MM_USERKEY ? "publickey" : "hostbased"; @@ -1382,6 +1486,9 @@ mm_record_login(Session *s, struct passwd *pw) socklen_t fromlen; struct sockaddr_storage from; + if (options.use_login) + return; + /* * Get IP address of client. If the connection is not a socket, let * the address be 0.0.0.0. @@ -1491,10 +1598,11 @@ mm_answer_pty_cleanup(int sock, Buffer *m) if ((s = session_by_tty(tty)) != NULL) mm_session_close(s); buffer_clear(m); - xfree(tty); + free(tty); return (0); } +#ifdef WITH_SSH1 int mm_answer_sesskey(int sock, Buffer *m) { @@ -1623,7 +1731,7 @@ mm_answer_rsa_challenge(int sock, Buffer *m) monitor_permit(mon_dispatch, MONITOR_REQ_RSARESPONSE, 1); - xfree(blob); + free(blob); key_free(key); return (0); } @@ -1655,9 +1763,9 @@ mm_answer_rsa_response(int sock, Buffer *m) fatal("%s: received bad response to challenge", __func__); success = auth_rsa_verify_response(key, ssh1_challenge, response); - xfree(blob); + free(blob); key_free(key); - xfree(response); + free(response); auth_method = key_blobtype == MM_RSAUSERKEY ? "rsa" : "rhosts-rsa"; @@ -1672,6 +1780,7 @@ mm_answer_rsa_response(int sock, Buffer *m) return (success); } +#endif int mm_answer_term(int sock, Buffer *req) @@ -1703,7 +1812,6 @@ mm_answer_term(int sock, Buffer *req) #endif } - #ifdef SSH_AUDIT_EVENTS /* Report that an audit event occurred */ int @@ -1741,7 +1849,7 @@ mm_answer_audit_command(int socket, Buffer *m) cmd = buffer_get_string(m, &len); /* sanity check command, if so how? */ audit_run_command(cmd); - xfree(cmd); + free(cmd); return (0); } #endif /* SSH_AUDIT_EVENTS */ @@ -1749,95 +1857,40 @@ mm_answer_audit_command(int socket, Buffer *m) void monitor_apply_keystate(struct monitor *pmonitor) { - if (compat20) { - set_newkeys(MODE_IN); - set_newkeys(MODE_OUT); - } else { - packet_set_protocol_flags(child_state.ssh1protoflags); - packet_set_encryption_key(child_state.ssh1key, - child_state.ssh1keylen, child_state.ssh1cipher); - xfree(child_state.ssh1key); + struct ssh *ssh = active_state; /* XXX */ + struct kex *kex; + int r; + + debug3("%s: packet_set_state", __func__); + if ((r = ssh_packet_set_state(ssh, child_state)) != 0) + fatal("%s: packet_set_state: %s", __func__, ssh_err(r)); + sshbuf_free(child_state); + child_state = NULL; + + if ((kex = ssh->kex) != 0) { + /* XXX set callbacks */ +#ifdef WITH_OPENSSL + kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; + kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; + kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; + kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; +# ifdef OPENSSL_HAS_ECC + kex->kex[KEX_ECDH_SHA2] = kexecdh_server; +# endif +#endif /* WITH_OPENSSL */ + kex->kex[KEX_C25519_SHA256] = kexc25519_server; + kex->load_host_public_key=&get_hostkey_public_by_type; + kex->load_host_private_key=&get_hostkey_private_by_type; + kex->host_key_index=&get_hostkey_index; + kex->sign = sshd_hostkey_sign; } - /* for rc4 and other stateful ciphers */ - packet_set_keycontext(MODE_OUT, child_state.keyout); - xfree(child_state.keyout); - packet_set_keycontext(MODE_IN, child_state.keyin); - xfree(child_state.keyin); - - if (!compat20) { - packet_set_iv(MODE_OUT, child_state.ivout); - xfree(child_state.ivout); - packet_set_iv(MODE_IN, child_state.ivin); - xfree(child_state.ivin); - } - - memcpy(&incoming_stream, &child_state.incoming, - sizeof(incoming_stream)); - memcpy(&outgoing_stream, &child_state.outgoing, - sizeof(outgoing_stream)); - /* Update with new address */ - if (options.compression) - mm_init_compression(pmonitor->m_zlib); - - /* Network I/O buffers */ - /* XXX inefficient for large buffers, need: buffer_init_from_string */ - buffer_clear(packet_get_input()); - buffer_append(packet_get_input(), child_state.input, child_state.ilen); - memset(child_state.input, 0, child_state.ilen); - xfree(child_state.input); - - buffer_clear(packet_get_output()); - buffer_append(packet_get_output(), child_state.output, - child_state.olen); - memset(child_state.output, 0, child_state.olen); - xfree(child_state.output); - - /* Roaming */ - if (compat20) - roam_set_bytes(child_state.sent_bytes, child_state.recv_bytes); -} - -static Kex * -mm_get_kex(Buffer *m) -{ - Kex *kex; - void *blob; - u_int bloblen; - - kex = xcalloc(1, sizeof(*kex)); - kex->session_id = buffer_get_string(m, &kex->session_id_len); - if (session_id2 == NULL || - kex->session_id_len != session_id2_len || - timingsafe_bcmp(kex->session_id, session_id2, session_id2_len) != 0) - fatal("mm_get_get: internal error: bad session id"); - kex->we_need = buffer_get_int(m); - kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; - kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; - kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; - kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; - kex->kex[KEX_ECDH_SHA2] = kexecdh_server; - kex->server = 1; - kex->hostkey_type = buffer_get_int(m); - kex->kex_type = buffer_get_int(m); - blob = buffer_get_string(m, &bloblen); - buffer_init(&kex->my); - buffer_append(&kex->my, blob, bloblen); - xfree(blob); - blob = buffer_get_string(m, &bloblen); - buffer_init(&kex->peer); - buffer_append(&kex->peer, blob, bloblen); - xfree(blob); - kex->done = 1; - kex->flags = buffer_get_int(m); - kex->client_version_string = buffer_get_string(m, NULL); - kex->server_version_string = buffer_get_string(m, NULL); - kex->load_host_public_key=&get_hostkey_public_by_type; - kex->load_host_private_key=&get_hostkey_private_by_type; - kex->host_key_index=&get_hostkey_index; - - return (kex); + if (options.compression) { + ssh_packet_set_compress_hooks(ssh, pmonitor->m_zlib, + (ssh_packet_comp_alloc_func *)mm_zalloc, + (ssh_packet_comp_free_func *)mm_zfree); + } } /* This function requries careful sanity checking */ @@ -1845,118 +1898,16 @@ mm_get_kex(Buffer *m) void mm_get_keystate(struct monitor *pmonitor) { - Buffer m; - u_char *blob, *p; - u_int bloblen, plen; - u_int32_t seqnr, packets; - u_int64_t blocks, bytes; - debug3("%s: Waiting for new keys", __func__); - buffer_init(&m); - mm_request_receive_expect(pmonitor->m_sendfd, MONITOR_REQ_KEYEXPORT, &m); - if (!compat20) { - child_state.ssh1protoflags = buffer_get_int(&m); - child_state.ssh1cipher = buffer_get_int(&m); - child_state.ssh1key = buffer_get_string(&m, - &child_state.ssh1keylen); - child_state.ivout = buffer_get_string(&m, - &child_state.ivoutlen); - child_state.ivin = buffer_get_string(&m, &child_state.ivinlen); - goto skip; - } else { - /* Get the Kex for rekeying */ - *pmonitor->m_pkex = mm_get_kex(&m); - } - - blob = buffer_get_string(&m, &bloblen); - current_keys[MODE_OUT] = mm_newkeys_from_blob(blob, bloblen); - xfree(blob); - - debug3("%s: Waiting for second key", __func__); - blob = buffer_get_string(&m, &bloblen); - current_keys[MODE_IN] = mm_newkeys_from_blob(blob, bloblen); - xfree(blob); - - /* Now get sequence numbers for the packets */ - seqnr = buffer_get_int(&m); - blocks = buffer_get_int64(&m); - packets = buffer_get_int(&m); - bytes = buffer_get_int64(&m); - packet_set_state(MODE_OUT, seqnr, blocks, packets, bytes); - seqnr = buffer_get_int(&m); - blocks = buffer_get_int64(&m); - packets = buffer_get_int(&m); - bytes = buffer_get_int64(&m); - packet_set_state(MODE_IN, seqnr, blocks, packets, bytes); - - skip: - /* Get the key context */ - child_state.keyout = buffer_get_string(&m, &child_state.keyoutlen); - child_state.keyin = buffer_get_string(&m, &child_state.keyinlen); - - debug3("%s: Getting compression state", __func__); - /* Get compression state */ - p = buffer_get_string(&m, &plen); - if (plen != sizeof(child_state.outgoing)) - fatal("%s: bad request size", __func__); - memcpy(&child_state.outgoing, p, sizeof(child_state.outgoing)); - xfree(p); - - p = buffer_get_string(&m, &plen); - if (plen != sizeof(child_state.incoming)) - fatal("%s: bad request size", __func__); - memcpy(&child_state.incoming, p, sizeof(child_state.incoming)); - xfree(p); - - /* Network I/O buffers */ - debug3("%s: Getting Network I/O buffers", __func__); - child_state.input = buffer_get_string(&m, &child_state.ilen); - child_state.output = buffer_get_string(&m, &child_state.olen); - - /* Roaming */ - if (compat20) { - child_state.sent_bytes = buffer_get_int64(&m); - child_state.recv_bytes = buffer_get_int64(&m); - } - - buffer_free(&m); + if ((child_state = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + mm_request_receive_expect(pmonitor->m_sendfd, MONITOR_REQ_KEYEXPORT, + child_state); + debug3("%s: GOT new keys", __func__); } -/* Allocation functions for zlib */ -void * -mm_zalloc(struct mm_master *mm, u_int ncount, u_int size) -{ - size_t len = (size_t) size * ncount; - void *address; - - if (len == 0 || ncount > SIZE_T_MAX / size) - fatal("%s: mm_zalloc(%u, %u)", __func__, ncount, size); - - address = mm_malloc(mm, len); - - return (address); -} - -void -mm_zfree(struct mm_master *mm, void *address) -{ - mm_free(mm, address); -} - -void -mm_init_compression(struct mm_master *mm) -{ - outgoing_stream.zalloc = (alloc_func)mm_zalloc; - outgoing_stream.zfree = (free_func)mm_zfree; - outgoing_stream.opaque = mm; - - incoming_stream.zalloc = (alloc_func)mm_zalloc; - incoming_stream.zfree = (free_func)mm_zfree; - incoming_stream.opaque = mm; -} - /* XXX */ #define FD_CLOSEONEXEC(x) do { \ @@ -1967,7 +1918,7 @@ mm_init_compression(struct mm_master *mm) static void monitor_openfds(struct monitor *mon, int do_logfds) { -#ifndef WIN32_FIXME + #ifndef WIN32_FIXME int pair[2]; if (socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) @@ -1998,6 +1949,7 @@ monitor_openfds(struct monitor *mon, int do_logfds) struct monitor * monitor_init(void) { + struct ssh *ssh = active_state; /* XXX */ struct monitor *mon; mon = xcalloc(1, sizeof(*mon)); @@ -2010,7 +1962,9 @@ monitor_init(void) mon->m_zlib = mm_create(mon->m_zback, 20 * MM_MEMSIZE); /* Compression needs to share state across borders */ - mm_init_compression(mon->m_zlib); + ssh_packet_set_compress_hooks(ssh, mon->m_zlib, + (ssh_packet_comp_alloc_func *)mm_zalloc, + (ssh_packet_comp_free_func *)mm_zfree); } return mon; @@ -2032,10 +1986,11 @@ mm_answer_gss_setup_ctx(int sock, Buffer *m) goid.elements = buffer_get_string(m, &len); goid.length = len; - +#ifndef WIN32_FIXME major = ssh_gssapi_server_ctx(&gsscontext, &goid); +#endif - xfree(goid.elements); + free(goid.elements); buffer_clear(m); buffer_put_int(m, major); @@ -2059,8 +2014,10 @@ mm_answer_gss_accept_ctx(int sock, Buffer *m) in.value = buffer_get_string(m, &len); in.length = len; +#ifndef WIN32_FIXME major = ssh_gssapi_accept_ctx(gsscontext, &in, &out, &flags); - xfree(in.value); +#endif + free(in.value); buffer_clear(m); buffer_put_int(m, major); @@ -2089,11 +2046,12 @@ mm_answer_gss_checkmic(int sock, Buffer *m) gssbuf.length = len; mic.value = buffer_get_string(m, &len); mic.length = len; - +#ifndef WIN32_FIXME ret = ssh_gssapi_checkmic(gsscontext, &gssbuf, &mic); +#endif - xfree(gssbuf.value); - xfree(mic.value); + free(gssbuf.value); + free(mic.value); buffer_clear(m); buffer_put_int(m, ret); @@ -2110,8 +2068,12 @@ int mm_answer_gss_userok(int sock, Buffer *m) { int authenticated; - +#ifndef WIN32_FIXME +// PRAGMA:TODO authenticated = authctxt->valid && ssh_gssapi_userok(authctxt->user); +#else + authenticated = authctxt->valid; +#endif buffer_clear(m); buffer_put_int(m, authenticated); @@ -2126,205 +2088,3 @@ mm_answer_gss_userok(int sock, Buffer *m) } #endif /* GSSAPI */ -#ifdef JPAKE -int -mm_answer_jpake_step1(int sock, Buffer *m) -{ - struct jpake_ctx *pctx; - u_char *x3_proof, *x4_proof; - u_int x3_proof_len, x4_proof_len; - - if (!options.zero_knowledge_password_authentication) - fatal("zero_knowledge_password_authentication disabled"); - - if (authctxt->jpake_ctx != NULL) - fatal("%s: authctxt->jpake_ctx already set (%p)", - __func__, authctxt->jpake_ctx); - authctxt->jpake_ctx = pctx = jpake_new(); - - jpake_step1(pctx->grp, - &pctx->server_id, &pctx->server_id_len, - &pctx->x3, &pctx->x4, &pctx->g_x3, &pctx->g_x4, - &x3_proof, &x3_proof_len, - &x4_proof, &x4_proof_len); - - JPAKE_DEBUG_CTX((pctx, "step1 done in %s", __func__)); - - buffer_clear(m); - - buffer_put_string(m, pctx->server_id, pctx->server_id_len); - buffer_put_bignum2(m, pctx->g_x3); - buffer_put_bignum2(m, pctx->g_x4); - buffer_put_string(m, x3_proof, x3_proof_len); - buffer_put_string(m, x4_proof, x4_proof_len); - - debug3("%s: sending step1", __func__); - mm_request_send(sock, MONITOR_ANS_JPAKE_STEP1, m); - - bzero(x3_proof, x3_proof_len); - bzero(x4_proof, x4_proof_len); - xfree(x3_proof); - xfree(x4_proof); - - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_GET_PWDATA, 1); - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 0); - - return 0; -} - -int -mm_answer_jpake_get_pwdata(int sock, Buffer *m) -{ - struct jpake_ctx *pctx = authctxt->jpake_ctx; - char *hash_scheme, *salt; - - if (pctx == NULL) - fatal("%s: pctx == NULL", __func__); - - auth2_jpake_get_pwdata(authctxt, &pctx->s, &hash_scheme, &salt); - - buffer_clear(m); - /* pctx->s is sensitive, not returned to slave */ - buffer_put_cstring(m, hash_scheme); - buffer_put_cstring(m, salt); - - debug3("%s: sending pwdata", __func__); - mm_request_send(sock, MONITOR_ANS_JPAKE_GET_PWDATA, m); - - bzero(hash_scheme, strlen(hash_scheme)); - bzero(salt, strlen(salt)); - xfree(hash_scheme); - xfree(salt); - - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP2, 1); - - return 0; -} - -int -mm_answer_jpake_step2(int sock, Buffer *m) -{ - struct jpake_ctx *pctx = authctxt->jpake_ctx; - u_char *x1_proof, *x2_proof, *x4_s_proof; - u_int x1_proof_len, x2_proof_len, x4_s_proof_len; - - if (pctx == NULL) - fatal("%s: pctx == NULL", __func__); - - if ((pctx->g_x1 = BN_new()) == NULL || - (pctx->g_x2 = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - buffer_get_bignum2(m, pctx->g_x1); - buffer_get_bignum2(m, pctx->g_x2); - pctx->client_id = buffer_get_string(m, &pctx->client_id_len); - x1_proof = buffer_get_string(m, &x1_proof_len); - x2_proof = buffer_get_string(m, &x2_proof_len); - - jpake_step2(pctx->grp, pctx->s, pctx->g_x3, - pctx->g_x1, pctx->g_x2, pctx->x4, - pctx->client_id, pctx->client_id_len, - pctx->server_id, pctx->server_id_len, - x1_proof, x1_proof_len, - x2_proof, x2_proof_len, - &pctx->b, - &x4_s_proof, &x4_s_proof_len); - - JPAKE_DEBUG_CTX((pctx, "step2 done in %s", __func__)); - - bzero(x1_proof, x1_proof_len); - bzero(x2_proof, x2_proof_len); - xfree(x1_proof); - xfree(x2_proof); - - buffer_clear(m); - - buffer_put_bignum2(m, pctx->b); - buffer_put_string(m, x4_s_proof, x4_s_proof_len); - - debug3("%s: sending step2", __func__); - mm_request_send(sock, MONITOR_ANS_JPAKE_STEP2, m); - - bzero(x4_s_proof, x4_s_proof_len); - xfree(x4_s_proof); - - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_KEY_CONFIRM, 1); - - return 0; -} - -int -mm_answer_jpake_key_confirm(int sock, Buffer *m) -{ - struct jpake_ctx *pctx = authctxt->jpake_ctx; - u_char *x2_s_proof; - u_int x2_s_proof_len; - - if (pctx == NULL) - fatal("%s: pctx == NULL", __func__); - - if ((pctx->a = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - buffer_get_bignum2(m, pctx->a); - x2_s_proof = buffer_get_string(m, &x2_s_proof_len); - - jpake_key_confirm(pctx->grp, pctx->s, pctx->a, - pctx->x4, pctx->g_x3, pctx->g_x4, pctx->g_x1, pctx->g_x2, - pctx->server_id, pctx->server_id_len, - pctx->client_id, pctx->client_id_len, - session_id2, session_id2_len, - x2_s_proof, x2_s_proof_len, - &pctx->k, - &pctx->h_k_sid_sessid, &pctx->h_k_sid_sessid_len); - - JPAKE_DEBUG_CTX((pctx, "key_confirm done in %s", __func__)); - - bzero(x2_s_proof, x2_s_proof_len); - buffer_clear(m); - - /* pctx->k is sensitive, not sent */ - buffer_put_string(m, pctx->h_k_sid_sessid, pctx->h_k_sid_sessid_len); - - debug3("%s: sending confirmation hash", __func__); - mm_request_send(sock, MONITOR_ANS_JPAKE_KEY_CONFIRM, m); - - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_CHECK_CONFIRM, 1); - - return 0; -} - -int -mm_answer_jpake_check_confirm(int sock, Buffer *m) -{ - int authenticated = 0; - u_char *peer_confirm_hash; - u_int peer_confirm_hash_len; - struct jpake_ctx *pctx = authctxt->jpake_ctx; - - if (pctx == NULL) - fatal("%s: pctx == NULL", __func__); - - peer_confirm_hash = buffer_get_string(m, &peer_confirm_hash_len); - - authenticated = jpake_check_confirm(pctx->k, - pctx->client_id, pctx->client_id_len, - session_id2, session_id2_len, - peer_confirm_hash, peer_confirm_hash_len) && authctxt->valid; - - JPAKE_DEBUG_CTX((pctx, "check_confirm done in %s", __func__)); - - bzero(peer_confirm_hash, peer_confirm_hash_len); - xfree(peer_confirm_hash); - - buffer_clear(m); - buffer_put_int(m, authenticated); - - debug3("%s: sending result %d", __func__, authenticated); - mm_request_send(sock, MONITOR_ANS_JPAKE_CHECK_CONFIRM, m); - - monitor_permit(mon_dispatch, MONITOR_REQ_JPAKE_STEP1, 1); - - auth_method = "jpake-01@openssh.com"; - return authenticated; -} - -#endif /* JPAKE */ diff --git a/monitor.h b/monitor.h index 5e7d552..93b8b66 100644 --- a/monitor.h +++ b/monitor.h @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor.h,v 1.16 2011/06/17 21:44:31 djm Exp $ */ +/* $OpenBSD: monitor.h,v 1.19 2015/01/19 19:52:16 markus Exp $ */ /* * Copyright 2002 Niels Provos @@ -28,44 +28,43 @@ #ifndef _MONITOR_H_ #define _MONITOR_H_ +/* Please keep *_REQ_* values on even numbers and *_ANS_* on odd numbers */ enum monitor_reqtype { - MONITOR_REQ_MODULI, MONITOR_ANS_MODULI, - MONITOR_REQ_FREE, MONITOR_REQ_AUTHSERV, - MONITOR_REQ_SIGN, MONITOR_ANS_SIGN, - MONITOR_REQ_PWNAM, MONITOR_ANS_PWNAM, - MONITOR_REQ_AUTH2_READ_BANNER, MONITOR_ANS_AUTH2_READ_BANNER, - MONITOR_REQ_AUTHPASSWORD, MONITOR_ANS_AUTHPASSWORD, - MONITOR_REQ_BSDAUTHQUERY, MONITOR_ANS_BSDAUTHQUERY, - MONITOR_REQ_BSDAUTHRESPOND, MONITOR_ANS_BSDAUTHRESPOND, - MONITOR_REQ_SKEYQUERY, MONITOR_ANS_SKEYQUERY, - MONITOR_REQ_SKEYRESPOND, MONITOR_ANS_SKEYRESPOND, - MONITOR_REQ_KEYALLOWED, MONITOR_ANS_KEYALLOWED, - MONITOR_REQ_KEYVERIFY, MONITOR_ANS_KEYVERIFY, - MONITOR_REQ_KEYEXPORT, - MONITOR_REQ_PTY, MONITOR_ANS_PTY, - MONITOR_REQ_PTYCLEANUP, - MONITOR_REQ_SESSKEY, MONITOR_ANS_SESSKEY, - MONITOR_REQ_SESSID, - MONITOR_REQ_RSAKEYALLOWED, MONITOR_ANS_RSAKEYALLOWED, - MONITOR_REQ_RSACHALLENGE, MONITOR_ANS_RSACHALLENGE, - MONITOR_REQ_RSARESPONSE, MONITOR_ANS_RSARESPONSE, - MONITOR_REQ_GSSSETUP, MONITOR_ANS_GSSSETUP, - MONITOR_REQ_GSSSTEP, MONITOR_ANS_GSSSTEP, - MONITOR_REQ_GSSUSEROK, MONITOR_ANS_GSSUSEROK, - MONITOR_REQ_GSSCHECKMIC, MONITOR_ANS_GSSCHECKMIC, - MONITOR_REQ_PAM_START, - MONITOR_REQ_PAM_ACCOUNT, MONITOR_ANS_PAM_ACCOUNT, - MONITOR_REQ_PAM_INIT_CTX, MONITOR_ANS_PAM_INIT_CTX, - MONITOR_REQ_PAM_QUERY, MONITOR_ANS_PAM_QUERY, - MONITOR_REQ_PAM_RESPOND, MONITOR_ANS_PAM_RESPOND, - MONITOR_REQ_PAM_FREE_CTX, MONITOR_ANS_PAM_FREE_CTX, - MONITOR_REQ_AUDIT_EVENT, MONITOR_REQ_AUDIT_COMMAND, - MONITOR_REQ_TERM, - MONITOR_REQ_JPAKE_STEP1, MONITOR_ANS_JPAKE_STEP1, - MONITOR_REQ_JPAKE_GET_PWDATA, MONITOR_ANS_JPAKE_GET_PWDATA, - MONITOR_REQ_JPAKE_STEP2, MONITOR_ANS_JPAKE_STEP2, - MONITOR_REQ_JPAKE_KEY_CONFIRM, MONITOR_ANS_JPAKE_KEY_CONFIRM, - MONITOR_REQ_JPAKE_CHECK_CONFIRM, MONITOR_ANS_JPAKE_CHECK_CONFIRM, + MONITOR_REQ_MODULI = 0, MONITOR_ANS_MODULI = 1, + MONITOR_REQ_FREE = 2, + MONITOR_REQ_AUTHSERV = 4, + MONITOR_REQ_SIGN = 6, MONITOR_ANS_SIGN = 7, + MONITOR_REQ_PWNAM = 8, MONITOR_ANS_PWNAM = 9, + MONITOR_REQ_AUTH2_READ_BANNER = 10, MONITOR_ANS_AUTH2_READ_BANNER = 11, + MONITOR_REQ_AUTHPASSWORD = 12, MONITOR_ANS_AUTHPASSWORD = 13, + MONITOR_REQ_BSDAUTHQUERY = 14, MONITOR_ANS_BSDAUTHQUERY = 15, + MONITOR_REQ_BSDAUTHRESPOND = 16, MONITOR_ANS_BSDAUTHRESPOND = 17, + MONITOR_REQ_SKEYQUERY = 18, MONITOR_ANS_SKEYQUERY = 19, + MONITOR_REQ_SKEYRESPOND = 20, MONITOR_ANS_SKEYRESPOND = 21, + MONITOR_REQ_KEYALLOWED = 22, MONITOR_ANS_KEYALLOWED = 23, + MONITOR_REQ_KEYVERIFY = 24, MONITOR_ANS_KEYVERIFY = 25, + MONITOR_REQ_KEYEXPORT = 26, + MONITOR_REQ_PTY = 28, MONITOR_ANS_PTY = 29, + MONITOR_REQ_PTYCLEANUP = 30, + MONITOR_REQ_SESSKEY = 32, MONITOR_ANS_SESSKEY = 33, + MONITOR_REQ_SESSID = 34, + MONITOR_REQ_RSAKEYALLOWED = 36, MONITOR_ANS_RSAKEYALLOWED = 37, + MONITOR_REQ_RSACHALLENGE = 38, MONITOR_ANS_RSACHALLENGE = 39, + MONITOR_REQ_RSARESPONSE = 40, MONITOR_ANS_RSARESPONSE = 41, + MONITOR_REQ_GSSSETUP = 42, MONITOR_ANS_GSSSETUP = 43, + MONITOR_REQ_GSSSTEP = 44, MONITOR_ANS_GSSSTEP = 45, + MONITOR_REQ_GSSUSEROK = 46, MONITOR_ANS_GSSUSEROK = 47, + MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49, + MONITOR_REQ_TERM = 50, + + MONITOR_REQ_PAM_START = 100, + MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103, + MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105, + MONITOR_REQ_PAM_QUERY = 106, MONITOR_ANS_PAM_QUERY = 107, + MONITOR_REQ_PAM_RESPOND = 108, MONITOR_ANS_PAM_RESPOND = 109, + MONITOR_REQ_PAM_FREE_CTX = 110, MONITOR_ANS_PAM_FREE_CTX = 111, + MONITOR_REQ_AUDIT_EVENT = 112, MONITOR_REQ_AUDIT_COMMAND = 113, + }; struct mm_master; @@ -76,7 +75,7 @@ struct monitor { int m_log_sendfd; struct mm_master *m_zback; struct mm_master *m_zlib; - struct Kex **m_pkex; + struct kex **m_pkex; pid_t m_pid; }; diff --git a/monitor_fdpass.c b/monitor_fdpass.c index 7eb6f5c..2ddd807 100644 --- a/monitor_fdpass.c +++ b/monitor_fdpass.c @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor_fdpass.c,v 1.19 2010/01/12 00:58:25 djm Exp $ */ +/* $OpenBSD: monitor_fdpass.c,v 1.20 2015/02/25 23:05:47 djm Exp $ */ /* * Copyright 2001 Niels Provos * All rights reserved. @@ -34,12 +34,17 @@ #endif #include -#ifdef HAVE_POLL_H -#include -#endif #include #include +#ifdef HAVE_POLL_H +# include +#else +# ifdef HAVE_SYS_POLL_H +# include +# endif +#endif + #include "log.h" #include "monitor_fdpass.h" @@ -65,6 +70,7 @@ mm_send_fd(int sock, int fd) msg.msg_accrights = (caddr_t)&fd; msg.msg_accrightslen = sizeof(fd); #else + memset(&cmsgbuf, 0, sizeof(cmsgbuf)); msg.msg_control = (caddr_t)&cmsgbuf.buf; msg.msg_controllen = sizeof(cmsgbuf.buf); cmsg = CMSG_FIRSTHDR(&msg); @@ -131,6 +137,7 @@ mm_receive_fd(int sock) msg.msg_accrights = (caddr_t)&fd; msg.msg_accrightslen = sizeof(fd); #else + memset(&cmsgbuf, 0, sizeof(cmsgbuf)); msg.msg_control = &cmsgbuf.buf; msg.msg_controllen = sizeof(cmsgbuf.buf); #endif diff --git a/monitor_mm.c b/monitor_mm.c index faf9f3d..aa47b2e 100644 --- a/monitor_mm.c +++ b/monitor_mm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor_mm.c,v 1.16 2009/06/22 05:39:28 dtucker Exp $ */ +/* $OpenBSD: monitor_mm.c,v 1.21 2015/02/06 23:21:59 millert Exp $ */ /* * Copyright 2002 Niels Provos * All rights reserved. @@ -30,11 +30,15 @@ #ifdef HAVE_SYS_MMAN_H #include #endif -#include #include "openbsd-compat/sys-tree.h" #include #include +#include +#ifdef HAVE_STDINT_H +#include +#endif +#include #include #include "xmalloc.h" @@ -45,7 +49,7 @@ static int mm_compare(struct mm_share *a, struct mm_share *b) { - long diff = (char *)a->address - (char *)b->address; + ptrdiff_t diff = (char *)a->address - (char *)b->address; if (diff == 0) return (0); @@ -64,7 +68,7 @@ mm_make_entry(struct mm_master *mm, struct mmtree *head, struct mm_share *tmp, *tmp2; if (mm->mmalloc == NULL) - tmp = xmalloc(sizeof(struct mm_share)); + tmp = xcalloc(1, sizeof(struct mm_share)); else tmp = mm_xmalloc(mm->mmalloc, sizeof(struct mm_share)); tmp->address = address; @@ -72,8 +76,8 @@ mm_make_entry(struct mm_master *mm, struct mmtree *head, tmp2 = RB_INSERT(mmtree, head, tmp); if (tmp2 != NULL) - fatal("mm_make_entry(%p): double address %p->%p(%lu)", - mm, tmp2, address, (u_long)size); + fatal("mm_make_entry(%p): double address %p->%p(%zu)", + mm, tmp2, address, size); return (tmp); } @@ -87,7 +91,7 @@ mm_create(struct mm_master *mmalloc, size_t size) struct mm_master *mm; if (mmalloc == NULL) - mm = xmalloc(sizeof(struct mm_master)); + mm = xcalloc(1, sizeof(struct mm_master)); else mm = mm_xmalloc(mmalloc, sizeof(struct mm_master)); @@ -100,7 +104,7 @@ mm_create(struct mm_master *mmalloc, size_t size) address = xmmap(size); if (address == (void *)MAP_FAILED) - fatal("mmap(%lu): %s", (u_long)size, strerror(errno)); + fatal("mmap(%zu): %s", size, strerror(errno)); mm->address = address; mm->size = size; @@ -124,7 +128,7 @@ mm_freelist(struct mm_master *mmalloc, struct mmtree *head) next = RB_NEXT(mmtree, head, mms); RB_REMOVE(mmtree, head, mms); if (mmalloc == NULL) - xfree(mms); + free(mms); else mm_free(mmalloc, mms); } @@ -140,14 +144,14 @@ mm_destroy(struct mm_master *mm) #ifdef HAVE_MMAP if (munmap(mm->address, mm->size) == -1) - fatal("munmap(%p, %lu): %s", mm->address, (u_long)mm->size, + fatal("munmap(%p, %zu): %s", mm->address, mm->size, strerror(errno)); #else fatal("%s: UsePrivilegeSeparation=yes and Compression=yes not supported", __func__); #endif if (mm->mmalloc == NULL) - xfree(mm); + free(mm); else mm_free(mm->mmalloc, mm); } @@ -159,7 +163,8 @@ mm_xmalloc(struct mm_master *mm, size_t size) address = mm_malloc(mm, size); if (address == NULL) - fatal("%s: mm_malloc(%lu)", __func__, (u_long)size); + fatal("%s: mm_malloc(%zu)", __func__, size); + memset(address, 0, size); return (address); } @@ -173,7 +178,7 @@ mm_malloc(struct mm_master *mm, size_t size) if (size == 0) fatal("mm_malloc: try to allocate 0 space"); - if (size > SIZE_T_MAX - MM_MINSIZE + 1) + if (size > SIZE_MAX - MM_MINSIZE + 1) fatal("mm_malloc: size too big"); size = ((size + (MM_MINSIZE - 1)) / MM_MINSIZE) * MM_MINSIZE; @@ -193,12 +198,12 @@ mm_malloc(struct mm_master *mm, size_t size) /* Does not change order in RB tree */ mms->size -= size; - mms->address = (u_char *)mms->address + size; + mms->address = (char *)mms->address + size; if (mms->size == 0) { RB_REMOVE(mmtree, &mm->rb_free, mms); if (mm->mmalloc == NULL) - xfree(mms); + free(mms); else mm_free(mm->mmalloc, mms); } @@ -246,15 +251,15 @@ mm_free(struct mm_master *mm, void *address) /* Check if range does not overlap */ if (prev != NULL && MM_ADDRESS_END(prev) > address) - fatal("mm_free: memory corruption: %p(%lu) > %p", - prev->address, (u_long)prev->size, address); + fatal("mm_free: memory corruption: %p(%zu) > %p", + prev->address, prev->size, address); /* See if we can merge backwards */ if (prev != NULL && MM_ADDRESS_END(prev) == address) { prev->size += mms->size; RB_REMOVE(mmtree, &mm->rb_free, mms); if (mm->mmalloc == NULL) - xfree(mms); + free(mms); else mm_free(mm->mmalloc, mms); } else @@ -269,8 +274,8 @@ mm_free(struct mm_master *mm, void *address) return; if (MM_ADDRESS_END(prev) > mms->address) - fatal("mm_free: memory corruption: %p < %p(%lu)", - mms->address, prev->address, (u_long)prev->size); + fatal("mm_free: memory corruption: %p < %p(%zu)", + mms->address, prev->address, prev->size); if (MM_ADDRESS_END(prev) != mms->address) return; @@ -278,7 +283,7 @@ mm_free(struct mm_master *mm, void *address) RB_REMOVE(mmtree, &mm->rb_free, mms); if (mm->mmalloc == NULL) - xfree(mms); + free(mms); else mm_free(mm->mmalloc, mms); } @@ -341,12 +346,12 @@ mm_share_sync(struct mm_master **pmm, struct mm_master **pmmalloc) void mm_memvalid(struct mm_master *mm, void *address, size_t size) { - void *end = (u_char *)address + size; + void *end = (char *)address + size; if (address < mm->address) fatal("mm_memvalid: address too small: %p", address); if (end < address) fatal("mm_memvalid: end < address: %p < %p", end, address); - if (end > (void *)((u_char *)mm->address + mm->size)) + if (end > MM_ADDRESS_END(mm)) fatal("mm_memvalid: address too large: %p", address); } diff --git a/monitor_mm.h b/monitor_mm.h index c890f77..f1fae7e 100644 --- a/monitor_mm.h +++ b/monitor_mm.h @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor_mm.h,v 1.5 2008/04/29 11:20:31 otto Exp $ */ +/* $OpenBSD: monitor_mm.h,v 1.6 2014/01/04 17:50:55 tedu Exp $ */ /* * Copyright 2002 Niels Provos @@ -47,7 +47,7 @@ RB_PROTOTYPE(mmtree, mm_share, next, mm_compare) #define MM_MINSIZE 128 -#define MM_ADDRESS_END(x) (void *)((u_char *)(x)->address + (x)->size) +#define MM_ADDRESS_END(x) (void *)((char *)(x)->address + (x)->size) struct mm_master *mm_create(struct mm_master *, size_t); void mm_destroy(struct mm_master *); diff --git a/monitor_wrap.c b/monitor_wrap.c index 23f9461..5856977 100644 --- a/monitor_wrap.c +++ b/monitor_wrap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor_wrap.c,v 1.73 2011/06/17 21:44:31 djm Exp $ */ +/* $OpenBSD: monitor_wrap.c,v 1.85 2015/05/01 03:23:51 djm Exp $ */ /* * Copyright 2002 Niels Provos * Copyright 2002 Markus Friedl @@ -47,14 +47,18 @@ #include #include +#ifdef WITH_OPENSSL #include #include #include +#endif #include "openbsd-compat/sys-queue.h" #include "xmalloc.h" #include "ssh.h" +#ifdef WITH_OPENSSL #include "dh.h" +#endif #include "buffer.h" #include "key.h" #include "cipher.h" @@ -80,8 +84,6 @@ #include "atomicio.h" #include "monitor_fdpass.h" #include "misc.h" -#include "schnorr.h" -#include "jpake.h" #include "uuencode.h" #include "channels.h" @@ -89,6 +91,8 @@ #include "servconf.h" #include "roaming.h" +#include "ssherr.h" + /* Imports */ extern int compat20; extern z_stream incoming_stream; @@ -185,6 +189,7 @@ mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) rtype, type); } +#ifdef WITH_OPENSSL DH * mm_choose_dh(int min, int nbits, int max) { @@ -218,17 +223,19 @@ mm_choose_dh(int min, int nbits, int max) return (dh_new_group(g, p)); } +#endif int -mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) +mm_key_sign(Key *key, u_char **sigp, u_int *lenp, + const u_char *data, u_int datalen) { - Kex *kex = *pmonitor->m_pkex; + struct kex *kex = *pmonitor->m_pkex; Buffer m; debug3("%s entering", __func__); buffer_init(&m); - buffer_put_int(&m, kex->host_key_index(key)); + buffer_put_int(&m, kex->host_key_index(key, 0, active_state)); buffer_put_string(&m, data, datalen); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); @@ -268,8 +275,10 @@ mm_getpwnamallow(const char *username) fatal("%s: struct passwd size mismatch", __func__); pw->pw_name = buffer_get_string(&m, NULL); pw->pw_passwd = buffer_get_string(&m, NULL); +#ifdef HAVE_STRUCT_PASSWD_PW_GECOS pw->pw_gecos = buffer_get_string(&m, NULL); -#ifdef HAVE_PW_CLASS_IN_PASSWD +#endif +#ifdef HAVE_STRUCT_PASSWD_PW_CLASS pw->pw_class = buffer_get_string(&m, NULL); #endif pw->pw_dir = buffer_get_string(&m, NULL); @@ -295,7 +304,7 @@ out: #undef M_CP_STRARRAYOPT copy_set_server_options(&options, newopts, 1); - xfree(newopts); + free(newopts); buffer_free(&m); @@ -321,7 +330,7 @@ mm_auth2_read_banner(void) /* treat empty banner as missing banner */ if (strlen(banner) == 0) { - xfree(banner); + free(banner); banner = NULL; } return (banner); @@ -371,16 +380,17 @@ mm_auth_password(Authctxt *authctxt, char *password) } int -mm_user_key_allowed(struct passwd *pw, Key *key) +mm_user_key_allowed(struct passwd *pw, Key *key, int pubkey_auth_attempt) { - return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); + return (mm_key_allowed(MM_USERKEY, NULL, NULL, key, + pubkey_auth_attempt)); } int mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, Key *key) { - return (mm_key_allowed(MM_HOSTKEY, user, host, key)); + return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0)); } int @@ -390,13 +400,14 @@ mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, int ret; key->type = KEY_RSA; /* XXX hack for key_to_blob */ - ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); + ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key, 0); key->type = KEY_RSA1; return (ret); } int -mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) +mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key, + int pubkey_auth_attempt) { Buffer m; u_char *blob; @@ -414,7 +425,8 @@ mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) buffer_put_cstring(&m, user ? user : ""); buffer_put_cstring(&m, host ? host : ""); buffer_put_string(&m, blob, len); - xfree(blob); + buffer_put_int(&m, pubkey_auth_attempt); + free(blob); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); @@ -457,7 +469,7 @@ mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) buffer_put_string(&m, blob, len); buffer_put_string(&m, sig, siglen); buffer_put_string(&m, data, datalen); - xfree(blob); + free(blob); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); @@ -471,238 +483,21 @@ mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) return (verified); } -/* Export key state after authentication */ -Newkeys * -mm_newkeys_from_blob(u_char *blob, int blen) -{ - Buffer b; - u_int len; - Newkeys *newkey = NULL; - Enc *enc; - Mac *mac; - Comp *comp; - - debug3("%s: %p(%d)", __func__, blob, blen); -#ifdef DEBUG_PK - dump_base64(stderr, blob, blen); -#endif - buffer_init(&b); - buffer_append(&b, blob, blen); - - newkey = xmalloc(sizeof(*newkey)); - enc = &newkey->enc; - mac = &newkey->mac; - comp = &newkey->comp; - - /* Enc structure */ - enc->name = buffer_get_string(&b, NULL); - buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); - enc->enabled = buffer_get_int(&b); - enc->block_size = buffer_get_int(&b); - enc->key = buffer_get_string(&b, &enc->key_len); - enc->iv = buffer_get_string(&b, &len); - if (len != enc->block_size) - fatal("%s: bad ivlen: expected %u != %u", __func__, - enc->block_size, len); - - if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) - fatal("%s: bad cipher name %s or pointer %p", __func__, - enc->name, enc->cipher); - - /* Mac structure */ - mac->name = buffer_get_string(&b, NULL); - if (mac->name == NULL || mac_setup(mac, mac->name) == -1) - fatal("%s: can not setup mac %s", __func__, mac->name); - mac->enabled = buffer_get_int(&b); - mac->key = buffer_get_string(&b, &len); - if (len > mac->key_len) - fatal("%s: bad mac key length: %u > %d", __func__, len, - mac->key_len); - mac->key_len = len; - - /* Comp structure */ - comp->type = buffer_get_int(&b); - comp->enabled = buffer_get_int(&b); - comp->name = buffer_get_string(&b, NULL); - - len = buffer_len(&b); - if (len != 0) - error("newkeys_from_blob: remaining bytes in blob %u", len); - buffer_free(&b); - return (newkey); -} - -int -mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) -{ - Buffer b; - int len; - Enc *enc; - Mac *mac; - Comp *comp; - Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode); - - debug3("%s: converting %p", __func__, newkey); - - if (newkey == NULL) { - error("%s: newkey == NULL", __func__); - return 0; - } - enc = &newkey->enc; - mac = &newkey->mac; - comp = &newkey->comp; - - buffer_init(&b); - /* Enc structure */ - buffer_put_cstring(&b, enc->name); - /* The cipher struct is constant and shared, you export pointer */ - buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); - buffer_put_int(&b, enc->enabled); - buffer_put_int(&b, enc->block_size); - buffer_put_string(&b, enc->key, enc->key_len); - packet_get_keyiv(mode, enc->iv, enc->block_size); - buffer_put_string(&b, enc->iv, enc->block_size); - - /* Mac structure */ - buffer_put_cstring(&b, mac->name); - buffer_put_int(&b, mac->enabled); - buffer_put_string(&b, mac->key, mac->key_len); - - /* Comp structure */ - buffer_put_int(&b, comp->type); - buffer_put_int(&b, comp->enabled); - buffer_put_cstring(&b, comp->name); - - len = buffer_len(&b); - if (lenp != NULL) - *lenp = len; - if (blobp != NULL) { - *blobp = xmalloc(len); - memcpy(*blobp, buffer_ptr(&b), len); - } - memset(buffer_ptr(&b), 0, len); - buffer_free(&b); - return len; -} - -static void -mm_send_kex(Buffer *m, Kex *kex) -{ - buffer_put_string(m, kex->session_id, kex->session_id_len); - buffer_put_int(m, kex->we_need); - buffer_put_int(m, kex->hostkey_type); - buffer_put_int(m, kex->kex_type); - buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); - buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); - buffer_put_int(m, kex->flags); - buffer_put_cstring(m, kex->client_version_string); - buffer_put_cstring(m, kex->server_version_string); -} - void mm_send_keystate(struct monitor *monitor) { - Buffer m, *input, *output; - u_char *blob, *p; - u_int bloblen, plen; - u_int32_t seqnr, packets; - u_int64_t blocks, bytes; + struct ssh *ssh = active_state; /* XXX */ + struct sshbuf *m; + int r; - buffer_init(&m); - - if (!compat20) { - u_char iv[24]; - u_char *key; - u_int ivlen, keylen; - - buffer_put_int(&m, packet_get_protocol_flags()); - - buffer_put_int(&m, packet_get_ssh1_cipher()); - - debug3("%s: Sending ssh1 KEY+IV", __func__); - keylen = packet_get_encryption_key(NULL); - key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ - keylen = packet_get_encryption_key(key); - buffer_put_string(&m, key, keylen); - memset(key, 0, keylen); - xfree(key); - - ivlen = packet_get_keyiv_len(MODE_OUT); - packet_get_keyiv(MODE_OUT, iv, ivlen); - buffer_put_string(&m, iv, ivlen); - ivlen = packet_get_keyiv_len(MODE_OUT); - packet_get_keyiv(MODE_IN, iv, ivlen); - buffer_put_string(&m, iv, ivlen); - goto skip; - } else { - /* Kex for rekeying */ - mm_send_kex(&m, *monitor->m_pkex); - } - - debug3("%s: Sending new keys: %p %p", - __func__, packet_get_newkeys(MODE_OUT), - packet_get_newkeys(MODE_IN)); - - /* Keys from Kex */ - if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) - fatal("%s: conversion of newkeys failed", __func__); - - buffer_put_string(&m, blob, bloblen); - xfree(blob); - - if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) - fatal("%s: conversion of newkeys failed", __func__); - - buffer_put_string(&m, blob, bloblen); - xfree(blob); - - packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); - buffer_put_int(&m, seqnr); - buffer_put_int64(&m, blocks); - buffer_put_int(&m, packets); - buffer_put_int64(&m, bytes); - packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); - buffer_put_int(&m, seqnr); - buffer_put_int64(&m, blocks); - buffer_put_int(&m, packets); - buffer_put_int64(&m, bytes); - - debug3("%s: New keys have been sent", __func__); - skip: - /* More key context */ - plen = packet_get_keycontext(MODE_OUT, NULL); - p = xmalloc(plen+1); - packet_get_keycontext(MODE_OUT, p); - buffer_put_string(&m, p, plen); - xfree(p); - - plen = packet_get_keycontext(MODE_IN, NULL); - p = xmalloc(plen+1); - packet_get_keycontext(MODE_IN, p); - buffer_put_string(&m, p, plen); - xfree(p); - - /* Compression state */ - debug3("%s: Sending compression state", __func__); - buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); - buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); - - /* Network I/O buffers */ - input = (Buffer *)packet_get_input(); - output = (Buffer *)packet_get_output(); - buffer_put_string(&m, buffer_ptr(input), buffer_len(input)); - buffer_put_string(&m, buffer_ptr(output), buffer_len(output)); - - /* Roaming */ - if (compat20) { - buffer_put_int64(&m, get_sent_bytes()); - buffer_put_int64(&m, get_recv_bytes()); - } - - mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); + if ((m = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = ssh_packet_get_state(ssh, m)) != 0) + fatal("%s: get_state failed: %s", + __func__, ssh_err(r)); + mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m); debug3("%s: Finished sending state", __func__); - - buffer_free(&m); + sshbuf_free(m); } int @@ -742,10 +537,10 @@ mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) buffer_free(&m); strlcpy(namebuf, p, namebuflen); /* Possible truncation */ - xfree(p); + free(p); buffer_append(&loginmsg, msg, strlen(msg)); - xfree(msg); + free(msg); if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) @@ -811,7 +606,7 @@ mm_do_pam_account(void) ret = buffer_get_int(&m); msg = buffer_get_string(&m, NULL); buffer_append(&loginmsg, msg, strlen(msg)); - xfree(msg); + free(msg); buffer_free(&m); @@ -828,7 +623,6 @@ mm_sshpam_init_ctx(Authctxt *authctxt) debug3("%s", __func__); buffer_init(&m); - buffer_put_cstring(&m, authctxt->user); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); @@ -920,6 +714,7 @@ mm_terminate(void) buffer_free(&m); } +#ifdef WITH_SSH1 int mm_ssh1_session_key(BIGNUM *num) { @@ -939,6 +734,7 @@ mm_ssh1_session_key(BIGNUM *num) return (rsafail); } +#endif static void mm_chall_setup(char **name, char **infotxt, u_int *numprompts, @@ -1041,7 +837,7 @@ mm_skey_query(void *ctx, char **name, char **infotxt, mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); - xfree(challenge); + free(challenge); return (0); } @@ -1086,6 +882,7 @@ mm_ssh1_session_id(u_char session_id[16]) buffer_free(&m); } +#ifdef WITH_SSH1 int mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) { @@ -1115,7 +912,7 @@ mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) if ((key = key_from_blob(blob, blen)) == NULL) fatal("%s: key_from_blob failed", __func__); *rkey = key; - xfree(blob); + free(blob); } buffer_free(&m); @@ -1142,7 +939,7 @@ mm_auth_rsa_generate_challenge(Key *key) buffer_init(&m); buffer_put_string(&m, blob, blen); - xfree(blob); + free(blob); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); @@ -1171,7 +968,7 @@ mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) buffer_init(&m); buffer_put_string(&m, blob, blen); buffer_put_string(&m, response, 16); - xfree(blob); + free(blob); mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); @@ -1181,6 +978,7 @@ mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) return (success); } +#endif #ifdef SSH_AUDIT_EVENTS void @@ -1298,164 +1096,3 @@ mm_ssh_gssapi_userok(char *user) } #endif /* GSSAPI */ -#ifdef JPAKE -void -mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s, - char **hash_scheme, char **salt) -{ - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - mm_request_send(pmonitor->m_recvfd, - MONITOR_REQ_JPAKE_GET_PWDATA, &m); - - debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_JPAKE_GET_PWDATA, &m); - - *hash_scheme = buffer_get_string(&m, NULL); - *salt = buffer_get_string(&m, NULL); - - buffer_free(&m); -} - -void -mm_jpake_step1(struct modp_group *grp, - u_char **id, u_int *id_len, - BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2, - u_char **priv1_proof, u_int *priv1_proof_len, - u_char **priv2_proof, u_int *priv2_proof_len) -{ - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - mm_request_send(pmonitor->m_recvfd, - MONITOR_REQ_JPAKE_STEP1, &m); - - debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_JPAKE_STEP1, &m); - - if ((*priv1 = BN_new()) == NULL || - (*priv2 = BN_new()) == NULL || - (*g_priv1 = BN_new()) == NULL || - (*g_priv2 = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - - *id = buffer_get_string(&m, id_len); - /* priv1 and priv2 are, well, private */ - buffer_get_bignum2(&m, *g_priv1); - buffer_get_bignum2(&m, *g_priv2); - *priv1_proof = buffer_get_string(&m, priv1_proof_len); - *priv2_proof = buffer_get_string(&m, priv2_proof_len); - - buffer_free(&m); -} - -void -mm_jpake_step2(struct modp_group *grp, BIGNUM *s, - BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2, - const u_char *theirid, u_int theirid_len, - const u_char *myid, u_int myid_len, - const u_char *theirpub1_proof, u_int theirpub1_proof_len, - const u_char *theirpub2_proof, u_int theirpub2_proof_len, - BIGNUM **newpub, - u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len) -{ - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - /* monitor already has all bignums except theirpub1, theirpub2 */ - buffer_put_bignum2(&m, theirpub1); - buffer_put_bignum2(&m, theirpub2); - /* monitor already knows our id */ - buffer_put_string(&m, theirid, theirid_len); - buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len); - buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len); - - mm_request_send(pmonitor->m_recvfd, - MONITOR_REQ_JPAKE_STEP2, &m); - - debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_JPAKE_STEP2, &m); - - if ((*newpub = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - - buffer_get_bignum2(&m, *newpub); - *newpub_exponent_proof = buffer_get_string(&m, - newpub_exponent_proof_len); - - buffer_free(&m); -} - -void -mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val, - BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2, - BIGNUM *theirpub1, BIGNUM *theirpub2, - const u_char *my_id, u_int my_id_len, - const u_char *their_id, u_int their_id_len, - const u_char *sess_id, u_int sess_id_len, - const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len, - BIGNUM **k, - u_char **confirm_hash, u_int *confirm_hash_len) -{ - Buffer m; - - debug3("%s entering", __func__); - - buffer_init(&m); - /* monitor already has all bignums except step2_val */ - buffer_put_bignum2(&m, step2_val); - /* monitor already knows all the ids */ - buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len); - - mm_request_send(pmonitor->m_recvfd, - MONITOR_REQ_JPAKE_KEY_CONFIRM, &m); - - debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_JPAKE_KEY_CONFIRM, &m); - - /* 'k' is sensitive and stays in the monitor */ - *confirm_hash = buffer_get_string(&m, confirm_hash_len); - - buffer_free(&m); -} - -int -mm_jpake_check_confirm(const BIGNUM *k, - const u_char *peer_id, u_int peer_id_len, - const u_char *sess_id, u_int sess_id_len, - const u_char *peer_confirm_hash, u_int peer_confirm_hash_len) -{ - Buffer m; - int success = 0; - - debug3("%s entering", __func__); - - buffer_init(&m); - /* k is dummy in slave, ignored */ - /* monitor knows all the ids */ - buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len); - mm_request_send(pmonitor->m_recvfd, - MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m); - - debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__); - mm_request_receive_expect(pmonitor->m_recvfd, - MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m); - - success = buffer_get_int(&m); - buffer_free(&m); - - debug3("%s: success = %d", __func__, success); - return success; -} -#endif /* JPAKE */ diff --git a/monitor_wrap.h b/monitor_wrap.h index 0c7f2e3..de4a08f 100644 --- a/monitor_wrap.h +++ b/monitor_wrap.h @@ -1,4 +1,4 @@ -/* $OpenBSD: monitor_wrap.h,v 1.23 2011/06/17 21:44:31 djm Exp $ */ +/* $OpenBSD: monitor_wrap.h,v 1.27 2015/05/01 03:23:51 djm Exp $ */ /* * Copyright 2002 Niels Provos @@ -40,13 +40,13 @@ struct Authctxt; void mm_log_handler(LogLevel, const char *, void *); int mm_is_monitor(void); DH *mm_choose_dh(int, int, int); -int mm_key_sign(Key *, u_char **, u_int *, u_char *, u_int); +int mm_key_sign(Key *, u_char **, u_int *, const u_char *, u_int); void mm_inform_authserv(char *, char *); struct passwd *mm_getpwnamallow(const char *); char *mm_auth2_read_banner(void); int mm_auth_password(struct Authctxt *, char *); -int mm_key_allowed(enum mm_keytype, char *, char *, Key *); -int mm_user_key_allowed(struct passwd *, Key *); +int mm_key_allowed(enum mm_keytype, char *, char *, Key *, int); +int mm_user_key_allowed(struct passwd *, Key *, int); int mm_hostbased_key_allowed(struct passwd *, char *, char *, Key *); int mm_auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *); int mm_key_verify(Key *, u_char *, u_int, u_char *, u_int); @@ -87,7 +87,7 @@ void mm_ssh1_session_id(u_char *); int mm_ssh1_session_key(BIGNUM *); /* Key export functions */ -struct Newkeys *mm_newkeys_from_blob(u_char *, int); +struct newkeys *mm_newkeys_from_blob(u_char *, int); int mm_newkeys_to_blob(int, u_char **, u_int *); void monitor_apply_keystate(struct monitor *); @@ -102,30 +102,7 @@ int mm_bsdauth_respond(void *, u_int, char **); int mm_skey_query(void *, char **, char **, u_int *, char ***, u_int **); int mm_skey_respond(void *, u_int, char **); -/* jpake */ -struct modp_group; -void mm_auth2_jpake_get_pwdata(struct Authctxt *, BIGNUM **, char **, char **); -void mm_jpake_step1(struct modp_group *, u_char **, u_int *, - BIGNUM **, BIGNUM **, BIGNUM **, BIGNUM **, - u_char **, u_int *, u_char **, u_int *); -void mm_jpake_step2(struct modp_group *, BIGNUM *, - BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, - const u_char *, u_int, const u_char *, u_int, - const u_char *, u_int, const u_char *, u_int, - BIGNUM **, u_char **, u_int *); -void mm_jpake_key_confirm(struct modp_group *, BIGNUM *, BIGNUM *, - BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, - const u_char *, u_int, const u_char *, u_int, - const u_char *, u_int, const u_char *, u_int, - BIGNUM **, u_char **, u_int *); -int mm_jpake_check_confirm(const BIGNUM *, - const u_char *, u_int, const u_char *, u_int, const u_char *, u_int); - - /* zlib allocation hooks */ - -void *mm_zalloc(struct mm_master *, u_int, u_int); -void mm_zfree(struct mm_master *, void *); void mm_init_compression(struct mm_master *); #endif /* _MM_WRAP_H_ */ diff --git a/msg.c b/msg.c index cd5f98c..5a7b8ca 100644 --- a/msg.c +++ b/msg.c @@ -1,4 +1,4 @@ -/* $OpenBSD: msg.c,v 1.15 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: msg.c,v 1.16 2015/01/15 09:40:00 djm Exp $ */ /* * Copyright (c) 2002 Markus Friedl. All rights reserved. * @@ -34,17 +34,18 @@ #include #include -#include "buffer.h" +#include "sshbuf.h" +#include "ssherr.h" #include "log.h" #include "atomicio.h" #include "msg.h" #include "misc.h" int -ssh_msg_send(int fd, u_char type, Buffer *m) +ssh_msg_send(int fd, u_char type, struct sshbuf *m) { u_char buf[5]; - u_int mlen = buffer_len(m); + u_int mlen = sshbuf_len(m); debug3("ssh_msg_send: type %u", (unsigned int)type & 0xff); @@ -54,7 +55,7 @@ ssh_msg_send(int fd, u_char type, Buffer *m) error("ssh_msg_send: write"); return (-1); } - if (atomicio(vwrite, fd, buffer_ptr(m), mlen) != mlen) { + if (atomicio(vwrite, fd, (u_char *)sshbuf_ptr(m), mlen) != mlen) { error("ssh_msg_send: write"); return (-1); } @@ -62,10 +63,11 @@ ssh_msg_send(int fd, u_char type, Buffer *m) } int -ssh_msg_recv(int fd, Buffer *m) +ssh_msg_recv(int fd, struct sshbuf *m) { - u_char buf[4]; + u_char buf[4], *p; u_int msg_len; + int r; debug3("ssh_msg_recv entering"); @@ -79,9 +81,12 @@ ssh_msg_recv(int fd, Buffer *m) error("ssh_msg_recv: read: bad msg_len %u", msg_len); return (-1); } - buffer_clear(m); - buffer_append_space(m, msg_len); - if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) { + sshbuf_reset(m); + if ((r = sshbuf_reserve(m, msg_len, &p)) != 0) { + error("%s: buffer error: %s", __func__, ssh_err(r)); + return -1; + } + if (atomicio(read, fd, p, msg_len) != msg_len) { error("ssh_msg_recv: read: %s", strerror(errno)); return (-1); } diff --git a/msg.h b/msg.h index b0cb9b5..dfb3424 100644 --- a/msg.h +++ b/msg.h @@ -1,4 +1,4 @@ -/* $OpenBSD: msg.h,v 1.4 2006/03/25 22:22:43 djm Exp $ */ +/* $OpenBSD: msg.h,v 1.5 2015/01/15 09:40:00 djm Exp $ */ /* * Copyright (c) 2002 Markus Friedl. All rights reserved. * @@ -25,7 +25,8 @@ #ifndef SSH_MSG_H #define SSH_MSG_H -int ssh_msg_send(int, u_char, Buffer *); -int ssh_msg_recv(int, Buffer *); +struct sshbuf; +int ssh_msg_send(int, u_char, struct sshbuf *); +int ssh_msg_recv(int, struct sshbuf *); #endif diff --git a/mux.c b/mux.c index 53ac5ba..2d0ab92 100644 --- a/mux.c +++ b/mux.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mux.c,v 1.29 2011/06/22 22:08:42 djm Exp $ */ +/* $OpenBSD: mux.c,v 1.54 2015/08/19 23:18:26 djm Exp $ */ /* * Copyright (c) 2002-2008 Damien Miller * @@ -33,7 +33,6 @@ #include "includes.h" #include -#include #include #include #include @@ -63,10 +62,6 @@ # include #endif -#ifdef HAVE_LIBUTIL_H -# include -#endif - #include "openbsd-compat/sys-queue.h" #include "xmalloc.h" #include "log.h" @@ -109,6 +104,11 @@ struct mux_session_confirm_ctx { u_int rid; }; +/* Context for stdio fwd open confirmation callback */ +struct mux_stdio_confirm_ctx { + u_int rid; +}; + /* Context for global channel callback */ struct mux_channel_confirm_ctx { u_int cid; /* channel id */ @@ -161,6 +161,7 @@ struct mux_master_state { #define MUX_FWD_DYNAMIC 3 static void mux_session_confirm(int, int, void *); +static void mux_stdio_confirm(int, int, void *); static int process_mux_master_hello(u_int, Channel *, Buffer *, Buffer *); static int process_mux_new_session(u_int, Channel *, Buffer *, Buffer *); @@ -223,7 +224,8 @@ mux_master_control_cleanup_cb(int cid, void *unused) __func__, c->self, c->remote_id); c->remote_id = -1; sc->ctl_chan = -1; - if (sc->type != SSH_CHANNEL_OPEN) { + if (sc->type != SSH_CHANNEL_OPEN && + sc->type != SSH_CHANNEL_OPENING) { debug2("%s: channel %d: not open", __func__, sc->self); chan_mark_dead(sc); } else { @@ -290,13 +292,13 @@ process_mux_master_hello(u_int rid, Channel *c, Buffer *m, Buffer *r) char *value = buffer_get_string_ret(m, NULL); if (name == NULL || value == NULL) { - if (name != NULL) - xfree(name); + free(name); + free(value); goto malf; } debug2("Unrecognised slave extension \"%s\"", name); - xfree(name); - xfree(value); + free(name); + free(value); } state->hello_rcvd = 1; return 0; @@ -305,6 +307,7 @@ process_mux_master_hello(u_int rid, Channel *c, Buffer *m, Buffer *r) static int process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) { + #ifndef WIN32_FIXME Channel *nc; struct mux_session_confirm_ctx *cctx; @@ -317,6 +320,8 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) cctx->term = NULL; cctx->rid = rid; cmd = reserved = NULL; + cctx->env = NULL; + env_len = 0; if ((reserved = buffer_get_string_ret(m, NULL)) == NULL || buffer_get_int_ret(&cctx->want_tty, m) != 0 || buffer_get_int_ret(&cctx->want_x_fwd, m) != 0 || @@ -326,31 +331,28 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) (cctx->term = buffer_get_string_ret(m, &len)) == NULL || (cmd = buffer_get_string_ret(m, &len)) == NULL) { malf: - if (cmd != NULL) - xfree(cmd); - if (reserved != NULL) - xfree(reserved); - if (cctx->term != NULL) - xfree(cctx->term); + free(cmd); + free(reserved); + for (j = 0; j < env_len; j++) + free(cctx->env[j]); + free(cctx->env); + free(cctx->term); + free(cctx); error("%s: malformed message", __func__); return -1; } - xfree(reserved); + free(reserved); reserved = NULL; - cctx->env = NULL; - env_len = 0; while (buffer_len(m) > 0) { #define MUX_MAX_ENV_VARS 4096 - if ((cp = buffer_get_string_ret(m, &len)) == NULL) { - xfree(cmd); + if ((cp = buffer_get_string_ret(m, &len)) == NULL) goto malf; - } if (!env_permitted(cp)) { - xfree(cp); + free(cp); continue; } - cctx->env = xrealloc(cctx->env, env_len + 2, + cctx->env = xreallocarray(cctx->env, env_len + 2, sizeof(*cctx->env)); cctx->env[env_len++] = cp; cctx->env[env_len] = NULL; @@ -368,7 +370,7 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) buffer_init(&cctx->cmd); buffer_append(&cctx->cmd, cmd, strlen(cmd)); - xfree(cmd); + free(cmd); cmd = NULL; /* Gather fds from client */ @@ -379,12 +381,11 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) for (j = 0; j < i; j++) close(new_fd[j]); for (j = 0; j < env_len; j++) - xfree(cctx->env[j]); - if (env_len > 0) - xfree(cctx->env); - xfree(cctx->term); + free(cctx->env[j]); + free(cctx->env); + free(cctx->term); buffer_free(&cctx->cmd); - xfree(cctx); + free(cctx); /* prepare reply */ buffer_put_int(r, MUX_S_FAILURE); @@ -409,13 +410,14 @@ process_mux_new_session(u_int rid, Channel *c, Buffer *m, Buffer *r) close(new_fd[0]); close(new_fd[1]); close(new_fd[2]); - xfree(cctx->term); + free(cctx->term); if (env_len != 0) { for (i = 0; i < env_len; i++) - xfree(cctx->env[i]); - xfree(cctx->env); + free(cctx->env[i]); + free(cctx->env); } buffer_free(&cctx->cmd); + free(cctx); return 0; } @@ -535,29 +537,33 @@ process_mux_terminate(u_int rid, Channel *c, Buffer *m, Buffer *r) } static char * -format_forward(u_int ftype, Forward *fwd) +format_forward(u_int ftype, struct Forward *fwd) { char *ret; switch (ftype) { case MUX_FWD_LOCAL: xasprintf(&ret, "local forward %.200s:%d -> %.200s:%d", + (fwd->listen_path != NULL) ? fwd->listen_path : (fwd->listen_host == NULL) ? - (options.gateway_ports ? "*" : "LOCALHOST") : + (options.fwd_opts.gateway_ports ? "*" : "LOCALHOST") : fwd->listen_host, fwd->listen_port, + (fwd->connect_path != NULL) ? fwd->connect_path : fwd->connect_host, fwd->connect_port); break; case MUX_FWD_DYNAMIC: xasprintf(&ret, "dynamic forward %.200s:%d -> *", (fwd->listen_host == NULL) ? - (options.gateway_ports ? "*" : "LOCALHOST") : + (options.fwd_opts.gateway_ports ? "*" : "LOCALHOST") : fwd->listen_host, fwd->listen_port); break; case MUX_FWD_REMOTE: xasprintf(&ret, "remote forward %.200s:%d -> %.200s:%d", + (fwd->listen_path != NULL) ? fwd->listen_path : (fwd->listen_host == NULL) ? "LOCALHOST" : fwd->listen_host, fwd->listen_port, + (fwd->connect_path != NULL) ? fwd->connect_path : fwd->connect_host, fwd->connect_port); break; default: @@ -577,14 +583,18 @@ compare_host(const char *a, const char *b) } static int -compare_forward(Forward *a, Forward *b) +compare_forward(struct Forward *a, struct Forward *b) { if (!compare_host(a->listen_host, b->listen_host)) return 0; + if (!compare_host(a->listen_path, b->listen_path)) + return 0; if (a->listen_port != b->listen_port) return 0; if (!compare_host(a->connect_host, b->connect_host)) return 0; + if (!compare_host(a->connect_path, b->connect_path)) + return 0; if (a->connect_port != b->connect_port) return 0; @@ -596,7 +606,7 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt) { struct mux_channel_confirm_ctx *fctx = ctxt; char *failmsg = NULL; - Forward *rfwd; + struct Forward *rfwd; Channel *c; Buffer out; @@ -606,38 +616,60 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt) return; } buffer_init(&out); - if (fctx->fid >= options.num_remote_forwards) { + if (fctx->fid >= options.num_remote_forwards || + (options.remote_forwards[fctx->fid].connect_path == NULL && + options.remote_forwards[fctx->fid].connect_host == NULL)) { xasprintf(&failmsg, "unknown forwarding id %d", fctx->fid); goto fail; } rfwd = &options.remote_forwards[fctx->fid]; debug("%s: %s for: listen %d, connect %s:%d", __func__, type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure", - rfwd->listen_port, rfwd->connect_host, rfwd->connect_port); + rfwd->listen_port, rfwd->connect_path ? rfwd->connect_path : + rfwd->connect_host, rfwd->connect_port); if (type == SSH2_MSG_REQUEST_SUCCESS) { if (rfwd->listen_port == 0) { rfwd->allocated_port = packet_get_int(); - logit("Allocated port %u for mux remote forward" + debug("Allocated port %u for mux remote forward" " to %s:%d", rfwd->allocated_port, rfwd->connect_host, rfwd->connect_port); buffer_put_int(&out, MUX_S_REMOTE_PORT); buffer_put_int(&out, fctx->rid); buffer_put_int(&out, rfwd->allocated_port); + channel_update_permitted_opens(rfwd->handle, + rfwd->allocated_port); } else { buffer_put_int(&out, MUX_S_OK); buffer_put_int(&out, fctx->rid); } goto out; } else { - xasprintf(&failmsg, "remote port forwarding failed for " - "listen port %d", rfwd->listen_port); + if (rfwd->listen_port == 0) + channel_update_permitted_opens(rfwd->handle, -1); + if (rfwd->listen_path != NULL) + xasprintf(&failmsg, "remote port forwarding failed for " + "listen path %s", rfwd->listen_path); + else + xasprintf(&failmsg, "remote port forwarding failed for " + "listen port %d", rfwd->listen_port); + + debug2("%s: clearing registered forwarding for listen %d, " + "connect %s:%d", __func__, rfwd->listen_port, + rfwd->connect_path ? rfwd->connect_path : + rfwd->connect_host, rfwd->connect_port); + + free(rfwd->listen_host); + free(rfwd->listen_path); + free(rfwd->connect_host); + free(rfwd->connect_path); + memset(rfwd, 0, sizeof(*rfwd)); } fail: error("%s: %s", __func__, failmsg); buffer_put_int(&out, MUX_S_FAILURE); buffer_put_int(&out, fctx->rid); buffer_put_cstring(&out, failmsg); - xfree(failmsg); + free(failmsg); out: buffer_put_string(&c->output, buffer_ptr(&out), buffer_len(&out)); buffer_free(&out); @@ -649,30 +681,47 @@ mux_confirm_remote_forward(int type, u_int32_t seq, void *ctxt) static int process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) { - Forward fwd; + struct Forward fwd; char *fwd_desc = NULL; + char *listen_addr, *connect_addr; u_int ftype; + u_int lport, cport; int i, ret = 0, freefwd = 1; - fwd.listen_host = fwd.connect_host = NULL; + memset(&fwd, 0, sizeof(fwd)); + + /* XXX - lport/cport check redundant */ if (buffer_get_int_ret(&ftype, m) != 0 || - (fwd.listen_host = buffer_get_string_ret(m, NULL)) == NULL || - buffer_get_int_ret(&fwd.listen_port, m) != 0 || - (fwd.connect_host = buffer_get_string_ret(m, NULL)) == NULL || - buffer_get_int_ret(&fwd.connect_port, m) != 0) { + (listen_addr = buffer_get_string_ret(m, NULL)) == NULL || + buffer_get_int_ret(&lport, m) != 0 || + (connect_addr = buffer_get_string_ret(m, NULL)) == NULL || + buffer_get_int_ret(&cport, m) != 0 || + (lport != (u_int)PORT_STREAMLOCAL && lport > 65535) || + (cport != (u_int)PORT_STREAMLOCAL && cport > 65535)) { error("%s: malformed message", __func__); ret = -1; goto out; } + if (*listen_addr == '\0') { + free(listen_addr); + listen_addr = NULL; + } + if (*connect_addr == '\0') { + free(connect_addr); + connect_addr = NULL; + } - if (*fwd.listen_host == '\0') { - xfree(fwd.listen_host); - fwd.listen_host = NULL; - } - if (*fwd.connect_host == '\0') { - xfree(fwd.connect_host); - fwd.connect_host = NULL; - } + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_port = lport; + if (fwd.listen_port == PORT_STREAMLOCAL) + fwd.listen_path = listen_addr; + else + fwd.listen_host = listen_addr; + fwd.connect_port = cport; + if (fwd.connect_port == PORT_STREAMLOCAL) + fwd.connect_path = connect_addr; + else + fwd.connect_host = connect_addr; debug2("%s: channel %d: request %s", __func__, c->self, (fwd_desc = format_forward(ftype, &fwd))); @@ -681,27 +730,30 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) ftype != MUX_FWD_DYNAMIC) { logit("%s: invalid forwarding type %u", __func__, ftype); invalid: - if (fwd.listen_host) - xfree(fwd.listen_host); - if (fwd.connect_host) - xfree(fwd.connect_host); + free(listen_addr); + free(connect_addr); buffer_put_int(r, MUX_S_FAILURE); buffer_put_int(r, rid); buffer_put_cstring(r, "Invalid forwarding request"); return 0; } - if (fwd.listen_port >= 65536) { + if (ftype == MUX_FWD_DYNAMIC && fwd.listen_path) { + logit("%s: streamlocal and dynamic forwards " + "are mutually exclusive", __func__); + goto invalid; + } + if (fwd.listen_port != PORT_STREAMLOCAL && fwd.listen_port >= 65536) { logit("%s: invalid listen port %u", __func__, fwd.listen_port); goto invalid; } - if (fwd.connect_port >= 65536 || (ftype != MUX_FWD_DYNAMIC && - ftype != MUX_FWD_REMOTE && fwd.connect_port == 0)) { + if ((fwd.connect_port != PORT_STREAMLOCAL && fwd.connect_port >= 65536) + || (ftype != MUX_FWD_DYNAMIC && ftype != MUX_FWD_REMOTE && fwd.connect_port == 0)) { logit("%s: invalid connect port %u", __func__, fwd.connect_port); goto invalid; } - if (ftype != MUX_FWD_DYNAMIC && fwd.connect_host == NULL) { + if (ftype != MUX_FWD_DYNAMIC && fwd.connect_host == NULL && fwd.connect_path == NULL) { logit("%s: missing connect host", __func__); goto invalid; } @@ -752,9 +804,8 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) } if (ftype == MUX_FWD_LOCAL || ftype == MUX_FWD_DYNAMIC) { - if (channel_setup_local_fwd_listener(fwd.listen_host, - fwd.listen_port, fwd.connect_host, fwd.connect_port, - options.gateway_ports) < 0) { + if (!channel_setup_local_fwd_listener(&fwd, + &options.fwd_opts)) { fail: logit("slave-requested %s failed", fwd_desc); buffer_put_int(r, MUX_S_FAILURE); @@ -767,8 +818,8 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) } else { struct mux_channel_confirm_ctx *fctx; - if (channel_request_remote_forwarding(fwd.listen_host, - fwd.listen_port, fwd.connect_host, fwd.connect_port) < 0) + fwd.handle = channel_request_remote_forwarding(&fwd); + if (fwd.handle < 0) goto fail; add_remote_forward(&options, &fwd); fctx = xcalloc(1, sizeof(*fctx)); @@ -785,13 +836,12 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) buffer_put_int(r, MUX_S_OK); buffer_put_int(r, rid); out: - if (fwd_desc != NULL) - xfree(fwd_desc); + free(fwd_desc); if (freefwd) { - if (fwd.listen_host != NULL) - xfree(fwd.listen_host); - if (fwd.connect_host != NULL) - xfree(fwd.connect_host); + free(fwd.listen_host); + free(fwd.listen_path); + free(fwd.connect_host); + free(fwd.connect_path); } return ret; } @@ -799,46 +849,114 @@ process_mux_open_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) static int process_mux_close_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) { - Forward fwd; + struct Forward fwd, *found_fwd; char *fwd_desc = NULL; + const char *error_reason = NULL; + char *listen_addr = NULL, *connect_addr = NULL; u_int ftype; - int ret = 0; + int i, ret = 0; + u_int lport, cport; + + memset(&fwd, 0, sizeof(fwd)); - fwd.listen_host = fwd.connect_host = NULL; if (buffer_get_int_ret(&ftype, m) != 0 || - (fwd.listen_host = buffer_get_string_ret(m, NULL)) == NULL || - buffer_get_int_ret(&fwd.listen_port, m) != 0 || - (fwd.connect_host = buffer_get_string_ret(m, NULL)) == NULL || - buffer_get_int_ret(&fwd.connect_port, m) != 0) { + (listen_addr = buffer_get_string_ret(m, NULL)) == NULL || + buffer_get_int_ret(&lport, m) != 0 || + (connect_addr = buffer_get_string_ret(m, NULL)) == NULL || + buffer_get_int_ret(&cport, m) != 0 || + (lport != (u_int)PORT_STREAMLOCAL && lport > 65535) || + (cport != (u_int)PORT_STREAMLOCAL && cport > 65535)) { error("%s: malformed message", __func__); ret = -1; goto out; } - if (*fwd.listen_host == '\0') { - xfree(fwd.listen_host); - fwd.listen_host = NULL; + if (*listen_addr == '\0') { + free(listen_addr); + listen_addr = NULL; } - if (*fwd.connect_host == '\0') { - xfree(fwd.connect_host); - fwd.connect_host = NULL; + if (*connect_addr == '\0') { + free(connect_addr); + connect_addr = NULL; } - debug2("%s: channel %d: request %s", __func__, c->self, + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_port = lport; + if (fwd.listen_port == PORT_STREAMLOCAL) + fwd.listen_path = listen_addr; + else + fwd.listen_host = listen_addr; + fwd.connect_port = cport; + if (fwd.connect_port == PORT_STREAMLOCAL) + fwd.connect_path = connect_addr; + else + fwd.connect_host = connect_addr; + + debug2("%s: channel %d: request cancel %s", __func__, c->self, (fwd_desc = format_forward(ftype, &fwd))); - /* XXX implement this */ - buffer_put_int(r, MUX_S_FAILURE); - buffer_put_int(r, rid); - buffer_put_cstring(r, "unimplemented"); + /* make sure this has been requested */ + found_fwd = NULL; + switch (ftype) { + case MUX_FWD_LOCAL: + case MUX_FWD_DYNAMIC: + for (i = 0; i < options.num_local_forwards; i++) { + if (compare_forward(&fwd, + options.local_forwards + i)) { + found_fwd = options.local_forwards + i; + break; + } + } + break; + case MUX_FWD_REMOTE: + for (i = 0; i < options.num_remote_forwards; i++) { + if (compare_forward(&fwd, + options.remote_forwards + i)) { + found_fwd = options.remote_forwards + i; + break; + } + } + break; + } + if (found_fwd == NULL) + error_reason = "port not forwarded"; + else if (ftype == MUX_FWD_REMOTE) { + /* + * This shouldn't fail unless we confused the host/port + * between options.remote_forwards and permitted_opens. + * However, for dynamic allocated listen ports we need + * to use the actual listen port. + */ + if (channel_request_rforward_cancel(found_fwd) == -1) + error_reason = "port not in permitted opens"; + } else { /* local and dynamic forwards */ + /* Ditto */ + if (channel_cancel_lport_listener(&fwd, fwd.connect_port, + &options.fwd_opts) == -1) + error_reason = "port not found"; + } + + if (error_reason == NULL) { + buffer_put_int(r, MUX_S_OK); + buffer_put_int(r, rid); + + free(found_fwd->listen_host); + free(found_fwd->listen_path); + free(found_fwd->connect_host); + free(found_fwd->connect_path); + found_fwd->listen_host = found_fwd->connect_host = NULL; + found_fwd->listen_path = found_fwd->connect_path = NULL; + found_fwd->listen_port = found_fwd->connect_port = 0; + } else { + buffer_put_int(r, MUX_S_FAILURE); + buffer_put_int(r, rid); + buffer_put_cstring(r, error_reason); + } out: - if (fwd_desc != NULL) - xfree(fwd_desc); - if (fwd.listen_host != NULL) - xfree(fwd.listen_host); - if (fwd.connect_host != NULL) - xfree(fwd.connect_host); + free(fwd_desc); + free(listen_addr); + free(connect_addr); return ret; } @@ -850,19 +968,18 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) char *reserved, *chost; u_int cport, i, j; int new_fd[2]; + struct mux_stdio_confirm_ctx *cctx; chost = reserved = NULL; if ((reserved = buffer_get_string_ret(m, NULL)) == NULL || (chost = buffer_get_string_ret(m, NULL)) == NULL || buffer_get_int_ret(&cport, m) != 0) { - if (reserved != NULL) - xfree(reserved); - if (chost != NULL) - xfree(chost); + free(reserved); + free(chost); error("%s: malformed message", __func__); return -1; } - xfree(reserved); + free(reserved); debug2("%s: channel %d: request stdio fwd to %s:%u", __func__, c->self, chost, cport); @@ -874,7 +991,7 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) __func__, i); for (j = 0; j < i; j++) close(new_fd[j]); - xfree(chost); + free(chost); /* prepare reply */ buffer_put_int(r, MUX_S_FAILURE); @@ -898,7 +1015,7 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) cleanup: close(new_fd[0]); close(new_fd[1]); - xfree(chost); + free(chost); return 0; } @@ -931,15 +1048,60 @@ process_mux_stdio_fwd(u_int rid, Channel *c, Buffer *m, Buffer *r) channel_register_cleanup(nc->self, mux_master_session_cleanup_cb, 1); - /* prepare reply */ - /* XXX defer until channel confirmed */ - buffer_put_int(r, MUX_S_SESSION_OPENED); - buffer_put_int(r, rid); - buffer_put_int(r, nc->self); + cctx = xcalloc(1, sizeof(*cctx)); + cctx->rid = rid; + channel_register_open_confirm(nc->self, mux_stdio_confirm, cctx); + c->mux_pause = 1; /* stop handling messages until open_confirm done */ + /* reply is deferred, sent by mux_session_confirm */ return 0; } +/* Callback on open confirmation in mux master for a mux stdio fwd session. */ +static void +mux_stdio_confirm(int id, int success, void *arg) +{ + struct mux_stdio_confirm_ctx *cctx = arg; + Channel *c, *cc; + Buffer reply; + + if (cctx == NULL) + fatal("%s: cctx == NULL", __func__); + if ((c = channel_by_id(id)) == NULL) + fatal("%s: no channel for id %d", __func__, id); + if ((cc = channel_by_id(c->ctl_chan)) == NULL) + fatal("%s: channel %d lacks control channel %d", __func__, + id, c->ctl_chan); + + if (!success) { + debug3("%s: sending failure reply", __func__); + /* prepare reply */ + buffer_init(&reply); + buffer_put_int(&reply, MUX_S_FAILURE); + buffer_put_int(&reply, cctx->rid); + buffer_put_cstring(&reply, "Session open refused by peer"); + goto done; + } + + debug3("%s: sending success reply", __func__); + /* prepare reply */ + buffer_init(&reply); + buffer_put_int(&reply, MUX_S_SESSION_OPENED); + buffer_put_int(&reply, cctx->rid); + buffer_put_int(&reply, c->self); + + done: + /* Send reply */ + buffer_put_string(&cc->output, buffer_ptr(&reply), buffer_len(&reply)); + buffer_free(&reply); + + if (cc->mux_pause <= 0) + fatal("%s: mux_pause %d", __func__, cc->mux_pause); + cc->mux_pause = 0; /* start processing messages again */ + c->open_confirm_ctx = NULL; + free(cctx); +} + static int process_mux_stop_listening(u_int rid, Channel *c, Buffer *m, Buffer *r) { @@ -960,7 +1122,7 @@ process_mux_stop_listening(u_int rid, Channel *c, Buffer *m, Buffer *r) if (mux_listener_channel != NULL) { channel_free(mux_listener_channel); client_stop_mux(); - xfree(options.control_path); + free(options.control_path); options.control_path = NULL; mux_listener_channel = NULL; muxserver_sock = -1; @@ -979,7 +1141,7 @@ mux_master_read_cb(Channel *c) { struct mux_master_state *state = (struct mux_master_state *)c->mux_ctx; Buffer in, out; - void *ptr; + const u_char *ptr; u_int type, rid, have, i; int ret = -1; @@ -1060,7 +1222,7 @@ mux_exit_message(Channel *c, int exitval) Buffer m; Channel *mux_chan; - debug3("%s: channel %d: exit message, evitval %d", __func__, c->self, + debug3("%s: channel %d: exit message, exitval %d", __func__, c->self, exitval); if ((mux_chan = channel_by_id(c->ctl_chan)) == NULL) @@ -1103,12 +1265,11 @@ void muxserver_listen(void) { #ifndef WIN32_FIXME - struct sockaddr_un addr; - socklen_t sun_len; mode_t old_umask; char *orig_control_path = options.control_path; char rbuf[16+1]; u_int i, r; + int oerrno; if (options.control_path == NULL || options.control_master == SSHCTL_MASTER_NO) @@ -1133,24 +1294,12 @@ muxserver_listen(void) xasprintf(&options.control_path, "%s.%s", orig_control_path, rbuf); debug3("%s: temporary control path %s", __func__, options.control_path); - memset(&addr, '\0', sizeof(addr)); - addr.sun_family = AF_UNIX; - sun_len = offsetof(struct sockaddr_un, sun_path) + - strlen(options.control_path) + 1; - - if (strlcpy(addr.sun_path, options.control_path, - sizeof(addr.sun_path)) >= sizeof(addr.sun_path)) { - error("ControlPath \"%s\" too long for Unix domain socket", - options.control_path); - goto disable_mux_master; - } - - if ((muxserver_sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) - fatal("%s socket(): %s", __func__, strerror(errno)); - old_umask = umask(0177); - if (bind(muxserver_sock, (struct sockaddr *)&addr, sun_len) == -1) { - if (errno == EINVAL || errno == EADDRINUSE) { + muxserver_sock = unix_listener(options.control_path, 64, 0); + oerrno = errno; + umask(old_umask); + if (muxserver_sock < 0) { + if (oerrno == EINVAL || oerrno == EADDRINUSE) { error("ControlSocket %s already exists, " "disabling multiplexing", options.control_path); disable_mux_master: @@ -1158,17 +1307,16 @@ muxserver_listen(void) close(muxserver_sock); muxserver_sock = -1; } - xfree(options.control_path); + free(orig_control_path); + free(options.control_path); options.control_path = NULL; options.control_master = SSHCTL_MASTER_NO; return; - } else - fatal("%s bind(): %s", __func__, strerror(errno)); + } else { + /* unix_listener() logs the error */ + cleanup_exit(255); + } } - umask(old_umask); - - if (listen(muxserver_sock, 64) == -1) - fatal("%s listen(): %s", __func__, strerror(errno)); /* Now atomically "move" the mux socket into position */ if (link(options.control_path, orig_control_path) != 0) { @@ -1179,12 +1327,11 @@ muxserver_listen(void) } error("ControlSocket %s already exists, disabling multiplexing", orig_control_path); - xfree(orig_control_path); unlink(options.control_path); goto disable_mux_master; } unlink(options.control_path); - xfree(options.control_path); + free(options.control_path); options.control_path = orig_control_path; set_nonblock(muxserver_sock); @@ -1270,13 +1417,13 @@ mux_session_confirm(int id, int success, void *arg) cc->mux_pause = 0; /* start processing messages again */ c->open_confirm_ctx = NULL; buffer_free(&cctx->cmd); - xfree(cctx->term); + free(cctx->term); if (cctx->env != NULL) { for (i = 0; cctx->env[i] != NULL; i++) - xfree(cctx->env[i]); - xfree(cctx->env); + free(cctx->env[i]); + free(cctx->env); } - xfree(cctx); + free(cctx); } /* ** Multiplexing client support */ @@ -1402,13 +1549,15 @@ mux_client_read_packet(int fd, Buffer *m) { Buffer queue; u_int need, have; - void *ptr; + const u_char *ptr; int oerrno; buffer_init(&queue); if (mux_client_read(fd, &queue, 4) != 0) { if ((oerrno = errno) == EPIPE) - debug3("%s: read header failed: %s", __func__, strerror(errno)); + debug3("%s: read header failed: %s", __func__, + strerror(errno)); + buffer_free(&queue); errno = oerrno; return -1; } @@ -1416,6 +1565,7 @@ mux_client_read_packet(int fd, Buffer *m) if (mux_client_read(fd, &queue, need) != 0) { oerrno = errno; debug3("%s: read body failed: %s", __func__, strerror(errno)); + buffer_free(&queue); errno = oerrno; return -1; } @@ -1462,8 +1612,8 @@ mux_client_hello_exchange(int fd) char *value = buffer_get_string(&m, NULL); debug2("Unrecognised master extension \"%s\"", name); - xfree(name); - xfree(value); + free(name); + free(value); } buffer_free(&m); return 0; @@ -1563,25 +1713,35 @@ mux_client_request_terminate(int fd) } static int -mux_client_request_forward(int fd, u_int ftype, Forward *fwd) +mux_client_forward(int fd, int cancel_flag, u_int ftype, struct Forward *fwd) { Buffer m; char *e, *fwd_desc; u_int type, rid; fwd_desc = format_forward(ftype, fwd); - debug("Requesting %s", fwd_desc); - xfree(fwd_desc); + debug("Requesting %s %s", + cancel_flag ? "cancellation of" : "forwarding of", fwd_desc); + free(fwd_desc); buffer_init(&m); - buffer_put_int(&m, MUX_C_OPEN_FWD); + buffer_put_int(&m, cancel_flag ? MUX_C_CLOSE_FWD : MUX_C_OPEN_FWD); buffer_put_int(&m, muxclient_request_id); buffer_put_int(&m, ftype); - buffer_put_cstring(&m, - fwd->listen_host == NULL ? "" : fwd->listen_host); + if (fwd->listen_path != NULL) { + buffer_put_cstring(&m, fwd->listen_path); + } else { + buffer_put_cstring(&m, + fwd->listen_host == NULL ? "" : + (*fwd->listen_host == '\0' ? "*" : fwd->listen_host)); + } buffer_put_int(&m, fwd->listen_port); - buffer_put_cstring(&m, - fwd->connect_host == NULL ? "" : fwd->connect_host); + if (fwd->connect_path != NULL) { + buffer_put_cstring(&m, fwd->connect_path); + } else { + buffer_put_cstring(&m, + fwd->connect_host == NULL ? "" : fwd->connect_host); + } buffer_put_int(&m, fwd->connect_port); if (mux_client_write_packet(fd, &m) != 0) @@ -1603,8 +1763,10 @@ mux_client_request_forward(int fd, u_int ftype, Forward *fwd) case MUX_S_OK: break; case MUX_S_REMOTE_PORT: + if (cancel_flag) + fatal("%s: got MUX_S_REMOTE_PORT for cancel", __func__); fwd->allocated_port = buffer_get_int(&m); - logit("Allocated port %u for remote forward to %s:%d", + verbose("Allocated port %u for remote forward to %s:%d", fwd->allocated_port, fwd->connect_host ? fwd->connect_host : "", fwd->connect_port); @@ -1632,27 +1794,28 @@ mux_client_request_forward(int fd, u_int ftype, Forward *fwd) } static int -mux_client_request_forwards(int fd) +mux_client_forwards(int fd, int cancel_flag) { - int i; + int i, ret = 0; - debug3("%s: requesting forwardings: %d local, %d remote", __func__, + debug3("%s: %s forwardings: %d local, %d remote", __func__, + cancel_flag ? "cancel" : "request", options.num_local_forwards, options.num_remote_forwards); /* XXX ExitOnForwardingFailure */ for (i = 0; i < options.num_local_forwards; i++) { - if (mux_client_request_forward(fd, + if (mux_client_forward(fd, cancel_flag, options.local_forwards[i].connect_port == 0 ? MUX_FWD_DYNAMIC : MUX_FWD_LOCAL, options.local_forwards + i) != 0) - return -1; + ret = -1; } for (i = 0; i < options.num_remote_forwards; i++) { - if (mux_client_request_forward(fd, MUX_FWD_REMOTE, + if (mux_client_forward(fd, cancel_flag, MUX_FWD_REMOTE, options.remote_forwards + i) != 0) - return -1; + ret = -1; } - return 0; + return ret; } static int @@ -1894,7 +2057,7 @@ mux_client_request_stdio_fwd(int fd) case MUX_S_FAILURE: e = buffer_get_string(&m, NULL); buffer_free(&m); - fatal("%s: stdio forwarding request failed: %s", __func__, e); + fatal("Stdio forwarding request failed: %s", e); default: buffer_free(&m); error("%s: unexpected response from master 0x%08x", @@ -2048,11 +2211,11 @@ muxclient(const char *path) fprintf(stderr, "Exit request sent.\r\n"); exit(0); case SSHMUX_COMMAND_FORWARD: - if (mux_client_request_forwards(sock) != 0) + if (mux_client_forwards(sock, 0) != 0) fatal("%s: master forward request failed", __func__); exit(0); case SSHMUX_COMMAND_OPEN: - if (mux_client_request_forwards(sock) != 0) { + if (mux_client_forwards(sock, 0) != 0) { error("%s: master forward request failed", __func__); return; } @@ -2065,6 +2228,11 @@ muxclient(const char *path) mux_client_request_stop_listening(sock); fprintf(stderr, "Stop listening request sent.\r\n"); exit(0); + case SSHMUX_COMMAND_CANCEL_FWD: + if (mux_client_forwards(sock, 1) != 0) + error("%s: master cancel forward request failed", + __func__); + exit(0); default: fatal("unrecognised muxclient_command %d", muxclient_command); } diff --git a/myproposal.h b/myproposal.h index 0bc1c77..46e5b98 100644 --- a/myproposal.h +++ b/myproposal.h @@ -1,4 +1,4 @@ -/* $OpenBSD: myproposal.h,v 1.28 2011/08/02 01:22:11 djm Exp $ */ +/* $OpenBSD: myproposal.h,v 1.47 2015/07/10 06:21:53 markus Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. @@ -26,7 +26,10 @@ #include +/* conditional algorithm support */ + #ifdef OPENSSL_HAS_ECC +#ifdef OPENSSL_HAS_NISTP521 # define KEX_ECDH_METHODS \ "ecdh-sha2-nistp256," \ "ecdh-sha2-nistp384," \ @@ -40,73 +43,153 @@ "ecdsa-sha2-nistp384," \ "ecdsa-sha2-nistp521," #else +# define KEX_ECDH_METHODS \ + "ecdh-sha2-nistp256," \ + "ecdh-sha2-nistp384," +# define HOSTKEY_ECDSA_CERT_METHODS \ + "ecdsa-sha2-nistp256-cert-v01@openssh.com," \ + "ecdsa-sha2-nistp384-cert-v01@openssh.com," +# define HOSTKEY_ECDSA_METHODS \ + "ecdsa-sha2-nistp256," \ + "ecdsa-sha2-nistp384," +#endif +#else # define KEX_ECDH_METHODS # define HOSTKEY_ECDSA_CERT_METHODS # define HOSTKEY_ECDSA_METHODS #endif -/* Old OpenSSL doesn't support what we need for DHGEX-sha256 */ -#if OPENSSL_VERSION_NUMBER >= 0x00907000L -# define KEX_SHA256_METHODS \ - "diffie-hellman-group-exchange-sha256," +#ifdef OPENSSL_HAVE_EVPGCM +# define AESGCM_CIPHER_MODES \ + ",aes128-gcm@openssh.com,aes256-gcm@openssh.com" #else -# define KEX_SHA256_METHODS +# define AESGCM_CIPHER_MODES #endif -# define KEX_DEFAULT_KEX \ +#ifdef HAVE_EVP_SHA256 +# define KEX_SHA256_METHODS \ + "diffie-hellman-group-exchange-sha256," +#define SHA2_HMAC_MODES \ + "hmac-sha2-256," \ + "hmac-sha2-512," +#else +# define KEX_SHA256_METHODS +# define SHA2_HMAC_MODES +#endif + +#ifdef WITH_OPENSSL +# ifdef HAVE_EVP_SHA256 +# define KEX_CURVE25519_METHODS "curve25519-sha256@libssh.org," +# else +# define KEX_CURVE25519_METHODS "" +# endif +#define KEX_COMMON_KEX \ + KEX_CURVE25519_METHODS \ KEX_ECDH_METHODS \ - KEX_SHA256_METHODS \ + KEX_SHA256_METHODS + +#define KEX_SERVER_KEX KEX_COMMON_KEX \ + "diffie-hellman-group14-sha1" \ + +#define KEX_CLIENT_KEX KEX_COMMON_KEX \ "diffie-hellman-group-exchange-sha1," \ - "diffie-hellman-group14-sha1," \ - "diffie-hellman-group1-sha1" + "diffie-hellman-group14-sha1" #define KEX_DEFAULT_PK_ALG \ HOSTKEY_ECDSA_CERT_METHODS \ + "ssh-ed25519-cert-v01@openssh.com," \ "ssh-rsa-cert-v01@openssh.com," \ - "ssh-dss-cert-v01@openssh.com," \ - "ssh-rsa-cert-v00@openssh.com," \ - "ssh-dss-cert-v00@openssh.com," \ HOSTKEY_ECDSA_METHODS \ - "ssh-rsa," \ - "ssh-dss" + "ssh-ed25519," \ + "ssh-rsa" \ -#define KEX_DEFAULT_ENCRYPT \ - "aes128-ctr,aes192-ctr,aes256-ctr," \ +/* the actual algorithms */ + +#define KEX_SERVER_ENCRYPT \ + "chacha20-poly1305@openssh.com," \ + "aes128-ctr,aes192-ctr,aes256-ctr" \ + AESGCM_CIPHER_MODES + +#define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT "," \ "arcfour256,arcfour128," \ "aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc," \ "aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se" -#ifdef HAVE_EVP_SHA256 -#define SHA2_HMAC_MODES \ - "hmac-sha2-256," \ - "hmac-sha2-256-96," \ - "hmac-sha2-512," \ - "hmac-sha2-512-96," -#else -# define SHA2_HMAC_MODES -#endif -#define KEX_DEFAULT_MAC \ - "hmac-md5," \ - "hmac-sha1," \ + +#define KEX_SERVER_MAC \ + "umac-64-etm@openssh.com," \ + "umac-128-etm@openssh.com," \ + "hmac-sha2-256-etm@openssh.com," \ + "hmac-sha2-512-etm@openssh.com," \ + "hmac-sha1-etm@openssh.com," \ "umac-64@openssh.com," \ - SHA2_HMAC_MODES \ + "umac-128@openssh.com," \ + "hmac-sha2-256," \ + "hmac-sha2-512," \ + "hmac-sha1" + +#define KEX_CLIENT_MAC KEX_SERVER_MAC "," \ + "hmac-md5-etm@openssh.com," \ + "hmac-ripemd160-etm@openssh.com," \ + "hmac-sha1-96-etm@openssh.com," \ + "hmac-md5-96-etm@openssh.com," \ + "hmac-md5," \ "hmac-ripemd160," \ "hmac-ripemd160@openssh.com," \ "hmac-sha1-96," \ "hmac-md5-96" +#else + +#define KEX_SERVER_KEX \ + "curve25519-sha256@libssh.org" +#define KEX_DEFAULT_PK_ALG \ + "ssh-ed25519-cert-v01@openssh.com," \ + "ssh-ed25519" +#define KEX_SERVER_ENCRYPT \ + "chacha20-poly1305@openssh.com," \ + "aes128-ctr,aes192-ctr,aes256-ctr" +#define KEX_SERVER_MAC \ + "umac-64-etm@openssh.com," \ + "umac-128-etm@openssh.com," \ + "hmac-sha2-256-etm@openssh.com," \ + "hmac-sha2-512-etm@openssh.com," \ + "hmac-sha1-etm@openssh.com," \ + "umac-64@openssh.com," \ + "umac-128@openssh.com," \ + "hmac-sha2-256," \ + "hmac-sha2-512," \ + "hmac-sha1" + +#define KEX_CLIENT_KEX KEX_SERVER_KEX +#define KEX_CLIENT_ENCRYPT KEX_SERVER_ENCRYPT +#define KEX_CLIENT_MAC KEX_SERVER_MAC + +#endif /* WITH_OPENSSL */ + #define KEX_DEFAULT_COMP "none,zlib@openssh.com,zlib" #define KEX_DEFAULT_LANG "" - -static char *myproposal[PROPOSAL_MAX] = { - KEX_DEFAULT_KEX, - KEX_DEFAULT_PK_ALG, - KEX_DEFAULT_ENCRYPT, - KEX_DEFAULT_ENCRYPT, - KEX_DEFAULT_MAC, - KEX_DEFAULT_MAC, - KEX_DEFAULT_COMP, - KEX_DEFAULT_COMP, - KEX_DEFAULT_LANG, +#define KEX_CLIENT \ + KEX_CLIENT_KEX, \ + KEX_DEFAULT_PK_ALG, \ + KEX_CLIENT_ENCRYPT, \ + KEX_CLIENT_ENCRYPT, \ + KEX_CLIENT_MAC, \ + KEX_CLIENT_MAC, \ + KEX_DEFAULT_COMP, \ + KEX_DEFAULT_COMP, \ + KEX_DEFAULT_LANG, \ KEX_DEFAULT_LANG -}; + +#define KEX_SERVER \ + KEX_SERVER_KEX, \ + KEX_DEFAULT_PK_ALG, \ + KEX_SERVER_ENCRYPT, \ + KEX_SERVER_ENCRYPT, \ + KEX_SERVER_MAC, \ + KEX_SERVER_MAC, \ + KEX_DEFAULT_COMP, \ + KEX_DEFAULT_COMP, \ + KEX_DEFAULT_LANG, \ + KEX_DEFAULT_LANG + diff --git a/opacket.c b/opacket.c new file mode 100644 index 0000000..b9160d5 --- /dev/null +++ b/opacket.c @@ -0,0 +1,349 @@ +/* Written by Markus Friedl. Placed in the public domain. */ + +#include "includes.h" + +#include "ssherr.h" +#include "packet.h" +#include "log.h" + +struct ssh *active_state, *backup_state; + +/* Map old to new API */ + +void +ssh_packet_start(struct ssh *ssh, u_char type) +{ + int r; + + if ((r = sshpkt_start(ssh, type)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_char(struct ssh *ssh, int value) +{ + u_char ch = value; + int r; + + if ((r = sshpkt_put_u8(ssh, ch)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_int(struct ssh *ssh, u_int value) +{ + int r; + + if ((r = sshpkt_put_u32(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_int64(struct ssh *ssh, u_int64_t value) +{ + int r; + + if ((r = sshpkt_put_u64(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_string(struct ssh *ssh, const void *buf, u_int len) +{ + int r; + + if ((r = sshpkt_put_string(ssh, buf, len)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_cstring(struct ssh *ssh, const char *str) +{ + int r; + + if ((r = sshpkt_put_cstring(ssh, str)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +void +ssh_packet_put_raw(struct ssh *ssh, const void *buf, u_int len) +{ + int r; + + if ((r = sshpkt_put(ssh, buf, len)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +#ifdef WITH_SSH1 +void +ssh_packet_put_bignum(struct ssh *ssh, BIGNUM * value) +{ + int r; + + if ((r = sshpkt_put_bignum1(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} +#endif + +#ifdef WITH_OPENSSL +void +ssh_packet_put_bignum2(struct ssh *ssh, BIGNUM * value) +{ + int r; + + if ((r = sshpkt_put_bignum2(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +# ifdef OPENSSL_HAS_ECC +void +ssh_packet_put_ecpoint(struct ssh *ssh, const EC_GROUP *curve, + const EC_POINT *point) +{ + int r; + + if ((r = sshpkt_put_ec(ssh, point, curve)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} +# endif +#endif /* WITH_OPENSSL */ + +void +ssh_packet_send(struct ssh *ssh) +{ + int r; + + if ((r = sshpkt_send(ssh)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +u_int +ssh_packet_get_char(struct ssh *ssh) +{ + u_char ch; + int r; + + if ((r = sshpkt_get_u8(ssh, &ch)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return ch; +} + +u_int +ssh_packet_get_int(struct ssh *ssh) +{ + u_int val; + int r; + + if ((r = sshpkt_get_u32(ssh, &val)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return val; +} + +u_int64_t +ssh_packet_get_int64(struct ssh *ssh) +{ + u_int64_t val; + int r; + + if ((r = sshpkt_get_u64(ssh, &val)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return val; +} + +#ifdef WITH_SSH1 +void +ssh_packet_get_bignum(struct ssh *ssh, BIGNUM * value) +{ + int r; + + if ((r = sshpkt_get_bignum1(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} +#endif + +#ifdef WITH_OPENSSL +void +ssh_packet_get_bignum2(struct ssh *ssh, BIGNUM * value) +{ + int r; + + if ((r = sshpkt_get_bignum2(ssh, value)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +# ifdef OPENSSL_HAS_ECC +void +ssh_packet_get_ecpoint(struct ssh *ssh, const EC_GROUP *curve, EC_POINT *point) +{ + int r; + + if ((r = sshpkt_get_ec(ssh, point, curve)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} +# endif +#endif /* WITH_OPENSSL */ + +void * +ssh_packet_get_string(struct ssh *ssh, u_int *length_ptr) +{ + int r; + size_t len; + u_char *val; + + if ((r = sshpkt_get_string(ssh, &val, &len)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + if (length_ptr != NULL) + *length_ptr = (u_int)len; + return val; +} + +const void * +ssh_packet_get_string_ptr(struct ssh *ssh, u_int *length_ptr) +{ + int r; + size_t len; + const u_char *val; + + if ((r = sshpkt_get_string_direct(ssh, &val, &len)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + if (length_ptr != NULL) + *length_ptr = (u_int)len; + return val; +} + +char * +ssh_packet_get_cstring(struct ssh *ssh, u_int *length_ptr) +{ + int r; + size_t len; + char *val; + + if ((r = sshpkt_get_cstring(ssh, &val, &len)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + if (length_ptr != NULL) + *length_ptr = (u_int)len; + return val; +} + +/* Old API, that had to be reimplemented */ + +void +packet_set_connection(int fd_in, int fd_out) +{ + active_state = ssh_packet_set_connection(active_state, fd_in, fd_out); + if (active_state == NULL) + fatal("%s: ssh_packet_set_connection failed", __func__); +} + +void +packet_backup_state(void) +{ + ssh_packet_backup_state(active_state, backup_state); +} + +void +packet_restore_state(void) +{ + ssh_packet_restore_state(active_state, backup_state); +} + +u_int +packet_get_char(void) +{ + return (ssh_packet_get_char(active_state)); +} + +u_int +packet_get_int(void) +{ + return (ssh_packet_get_int(active_state)); +} + +int +packet_read_seqnr(u_int32_t *seqnr) +{ + u_char type; + int r; + + if ((r = ssh_packet_read_seqnr(active_state, &type, seqnr)) != 0) + sshpkt_fatal(active_state, __func__, r); + return type; +} + +int +packet_read_poll_seqnr(u_int32_t *seqnr) +{ + u_char type; + int r; + + if ((r = ssh_packet_read_poll_seqnr(active_state, &type, seqnr))) + sshpkt_fatal(active_state, __func__, r); + return type; +} + +void +packet_close(void) +{ + ssh_packet_close(active_state); + active_state = NULL; +} + +void +packet_process_incoming(const char *buf, u_int len) +{ + int r; + + if ((r = ssh_packet_process_incoming(active_state, buf, len)) != 0) + sshpkt_fatal(active_state, __func__, r); +} + +void +packet_write_wait(void) +{ + int r; + + if ((r = ssh_packet_write_wait(active_state)) != 0) + sshpkt_fatal(active_state, __func__, r); +} + +void +packet_write_poll(void) +{ + int r; + + if ((r = ssh_packet_write_poll(active_state)) != 0) + sshpkt_fatal(active_state, __func__, r); +} + +void +packet_read_expect(int expected_type) +{ + int r; + + if ((r = ssh_packet_read_expect(active_state, expected_type)) != 0) + sshpkt_fatal(active_state, __func__, r); +} + +void +packet_disconnect(const char *fmt, ...) +{ + char buf[1024]; + va_list args; + + va_start(args, fmt); + vsnprintf(buf, sizeof(buf), fmt, args); + va_end(args); + ssh_packet_disconnect(active_state, "%s", buf); +} + +void +packet_send_debug(const char *fmt, ...) +{ + char buf[1024]; + va_list args; + + va_start(args, fmt); + vsnprintf(buf, sizeof(buf), fmt, args); + va_end(args); + ssh_packet_send_debug(active_state, "%s", buf); +} diff --git a/opacket.h b/opacket.h new file mode 100644 index 0000000..a0a60e5 --- /dev/null +++ b/opacket.h @@ -0,0 +1,168 @@ +#ifndef _OPACKET_H +/* Written by Markus Friedl. Placed in the public domain. */ + +/* Map old to new API */ +void ssh_packet_start(struct ssh *, u_char); +void ssh_packet_put_char(struct ssh *, int ch); +void ssh_packet_put_int(struct ssh *, u_int value); +void ssh_packet_put_int64(struct ssh *, u_int64_t value); +void ssh_packet_put_bignum(struct ssh *, BIGNUM * value); +void ssh_packet_put_bignum2(struct ssh *, BIGNUM * value); +void ssh_packet_put_ecpoint(struct ssh *, const EC_GROUP *, const EC_POINT *); +void ssh_packet_put_string(struct ssh *, const void *buf, u_int len); +void ssh_packet_put_cstring(struct ssh *, const char *str); +void ssh_packet_put_raw(struct ssh *, const void *buf, u_int len); +void ssh_packet_send(struct ssh *); + +u_int ssh_packet_get_char(struct ssh *); +u_int ssh_packet_get_int(struct ssh *); +u_int64_t ssh_packet_get_int64(struct ssh *); +void ssh_packet_get_bignum(struct ssh *, BIGNUM * value); +void ssh_packet_get_bignum2(struct ssh *, BIGNUM * value); +void ssh_packet_get_ecpoint(struct ssh *, const EC_GROUP *, EC_POINT *); +void *ssh_packet_get_string(struct ssh *, u_int *length_ptr); +char *ssh_packet_get_cstring(struct ssh *, u_int *length_ptr); + +/* don't allow remaining bytes after the end of the message */ +#define ssh_packet_check_eom(ssh) \ +do { \ + int _len = ssh_packet_remaining(ssh); \ + if (_len > 0) { \ + logit("Packet integrity error (%d bytes remaining) at %s:%d", \ + _len ,__FILE__, __LINE__); \ + ssh_packet_disconnect(ssh, \ + "Packet integrity error."); \ + } \ +} while (0) + +/* old API */ +void packet_close(void); +u_int packet_get_char(void); +u_int packet_get_int(void); +void packet_backup_state(void); +void packet_restore_state(void); +void packet_set_connection(int, int); +int packet_read_seqnr(u_int32_t *); +int packet_read_poll_seqnr(u_int32_t *); +void packet_process_incoming(const char *buf, u_int len); +void packet_write_wait(void); +void packet_write_poll(void); +void packet_read_expect(int expected_type); +#define packet_set_timeout(timeout, count) \ + ssh_packet_set_timeout(active_state, (timeout), (count)) +#define packet_connection_is_on_socket() \ + ssh_packet_connection_is_on_socket(active_state) +#define packet_set_nonblocking() \ + ssh_packet_set_nonblocking(active_state) +#define packet_get_connection_in() \ + ssh_packet_get_connection_in(active_state) +#define packet_get_connection_out() \ + ssh_packet_get_connection_out(active_state) +#define packet_set_protocol_flags(protocol_flags) \ + ssh_packet_set_protocol_flags(active_state, (protocol_flags)) +#define packet_get_protocol_flags() \ + ssh_packet_get_protocol_flags(active_state) +#define packet_start_compression(level) \ + ssh_packet_start_compression(active_state, (level)) +#define packet_set_encryption_key(key, keylen, number) \ + ssh_packet_set_encryption_key(active_state, (key), (keylen), (number)) +#define packet_start(type) \ + ssh_packet_start(active_state, (type)) +#define packet_put_char(value) \ + ssh_packet_put_char(active_state, (value)) +#define packet_put_int(value) \ + ssh_packet_put_int(active_state, (value)) +#define packet_put_int64(value) \ + ssh_packet_put_int64(active_state, (value)) +#define packet_put_string( buf, len) \ + ssh_packet_put_string(active_state, (buf), (len)) +#define packet_put_cstring(str) \ + ssh_packet_put_cstring(active_state, (str)) +#define packet_put_raw(buf, len) \ + ssh_packet_put_raw(active_state, (buf), (len)) +#define packet_put_bignum(value) \ + ssh_packet_put_bignum(active_state, (value)) +#define packet_put_bignum2(value) \ + ssh_packet_put_bignum2(active_state, (value)) +#define packet_send() \ + ssh_packet_send(active_state) +#define packet_read() \ + ssh_packet_read(active_state) +#define packet_get_int64() \ + ssh_packet_get_int64(active_state) +#define packet_get_bignum(value) \ + ssh_packet_get_bignum(active_state, (value)) +#define packet_get_bignum2(value) \ + ssh_packet_get_bignum2(active_state, (value)) +#define packet_remaining() \ + ssh_packet_remaining(active_state) +#define packet_get_string(length_ptr) \ + ssh_packet_get_string(active_state, (length_ptr)) +#define packet_get_string_ptr(length_ptr) \ + ssh_packet_get_string_ptr(active_state, (length_ptr)) +#define packet_get_cstring(length_ptr) \ + ssh_packet_get_cstring(active_state, (length_ptr)) +void packet_send_debug(const char *, ...) + __attribute__((format(printf, 1, 2))); +void packet_disconnect(const char *, ...) + __attribute__((format(printf, 1, 2))) + __attribute__((noreturn)); +#define packet_have_data_to_write() \ + ssh_packet_have_data_to_write(active_state) +#define packet_not_very_much_data_to_write() \ + ssh_packet_not_very_much_data_to_write(active_state) +#define packet_set_interactive(interactive, qos_interactive, qos_bulk) \ + ssh_packet_set_interactive(active_state, (interactive), (qos_interactive), (qos_bulk)) +#define packet_is_interactive() \ + ssh_packet_is_interactive(active_state) +#define packet_set_maxsize(s) \ + ssh_packet_set_maxsize(active_state, (s)) +#define packet_inc_alive_timeouts() \ + ssh_packet_inc_alive_timeouts(active_state) +#define packet_set_alive_timeouts(ka) \ + ssh_packet_set_alive_timeouts(active_state, (ka)) +#define packet_get_maxsize() \ + ssh_packet_get_maxsize(active_state) +#define packet_add_padding(pad) \ + sshpkt_add_padding(active_state, (pad)) +#define packet_send_ignore(nbytes) \ + ssh_packet_send_ignore(active_state, (nbytes)) +#define packet_need_rekeying() \ + ssh_packet_need_rekeying(active_state) +#define packet_set_server() \ + ssh_packet_set_server(active_state) +#define packet_set_authenticated() \ + ssh_packet_set_authenticated(active_state) +#define packet_get_input() \ + ssh_packet_get_input(active_state) +#define packet_get_output() \ + ssh_packet_get_output(active_state) +#define packet_set_compress_hooks(ctx, allocfunc, freefunc) \ + ssh_packet_set_compress_hooks(active_state, ctx, \ + allocfunc, freefunc); +#define packet_check_eom() \ + ssh_packet_check_eom(active_state) +#define set_newkeys(mode) \ + ssh_set_newkeys(active_state, (mode)) +#define packet_get_state(m) \ + ssh_packet_get_state(active_state, m) +#define packet_set_state(m) \ + ssh_packet_set_state(active_state, m) +#if 0 +#define get_remote_ipaddr() \ + ssh_remote_ipaddr(active_state) +#endif +#define packet_get_raw(lenp) \ + sshpkt_ptr(active_state, lenp) +#define packet_get_ecpoint(c,p) \ + ssh_packet_get_ecpoint(active_state, c, p) +#define packet_put_ecpoint(c,p) \ + ssh_packet_put_ecpoint(active_state, c, p) +#define packet_get_rekey_timeout() \ + ssh_packet_get_rekey_timeout(active_state) +#define packet_set_rekey_limits(x,y) \ + ssh_packet_set_rekey_limits(active_state, x, y) +#define packet_get_bytes(x,y) \ + ssh_packet_get_bytes(active_state, x, y) + +#endif /* _OPACKET_H */ diff --git a/openbsd-compat/Makefile.in b/openbsd-compat/Makefile.in index 41b22d8..3c5e3b7 100644 --- a/openbsd-compat/Makefile.in +++ b/openbsd-compat/Makefile.in @@ -1,4 +1,4 @@ -# $Id: Makefile.in,v 1.46 2010/10/07 11:19:24 djm Exp $ +# $Id: Makefile.in,v 1.56 2014/09/30 23:43:08 djm Exp $ sysconfdir=@sysconfdir@ piddir=@piddir@ @@ -16,9 +16,9 @@ RANLIB=@RANLIB@ INSTALL=@INSTALL@ LDFLAGS=-L. @LDFLAGS@ -OPENBSD=base64.o basename.o bindresvport.o daemon.o dirname.o fmt_scaled.o getcwd.o getgrouplist.o getopt.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o pwcache.o readpassphrase.o realpath.o rresvport.o setenv.o setproctitle.o sha2.o sigact.o strlcat.o strlcpy.o strmode.o strptime.o strsep.o strtonum.o strtoll.o strtoul.o timingsafe_bcmp.o vis.o +OPENBSD=base64.o basename.o bcrypt_pbkdf.o bindresvport.o blowfish.o daemon.o dirname.o fmt_scaled.o getcwd.o getgrouplist.o getopt_long.o getrrsetbyname.o glob.o inet_aton.o inet_ntoa.o inet_ntop.o mktemp.o pwcache.o readpassphrase.o reallocarray.o realpath.o rresvport.o setenv.o setproctitle.o sha1.o sha2.o rmd160.o md5.o sigact.o strlcat.o strlcpy.o strmode.o strnlen.o strptime.o strsep.o strtonum.o strtoll.o strtoul.o strtoull.o timingsafe_bcmp.o vis.o blowfish.o bcrypt_pbkdf.o explicit_bzero.o -COMPAT=bsd-arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o +COMPAT=arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o getrrsetbyname-ldns.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-setres_id.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o kludge-fd_set.o PORTS=port-aix.o port-irix.o port-linux.o port-solaris.o port-tun.o port-uw.o diff --git a/openbsd-compat/arc4random.c b/openbsd-compat/arc4random.c new file mode 100644 index 0000000..046f57e --- /dev/null +++ b/openbsd-compat/arc4random.c @@ -0,0 +1,328 @@ +/* OPENBSD ORIGINAL: lib/libc/crypto/arc4random.c */ + +/* $OpenBSD: arc4random.c,v 1.25 2013/10/01 18:34:57 markus Exp $ */ + +/* + * Copyright (c) 1996, David Mazieres + * Copyright (c) 2008, Damien Miller + * Copyright (c) 2013, Markus Friedl + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * ChaCha based random number generator for OpenBSD. + */ + +#include "includes.h" + +#include + +#include +#include +#include +#include + +#ifndef HAVE_ARC4RANDOM + +#ifdef WITH_OPENSSL +#include +#include +#endif + +#include "log.h" + +#define KEYSTREAM_ONLY +#include "chacha_private.h" + +#ifdef __GNUC__ +#define inline __inline +#else /* !__GNUC__ */ +#define inline +#endif /* !__GNUC__ */ + +/* OpenSSH isn't multithreaded */ +#define _ARC4_LOCK() +#define _ARC4_UNLOCK() + +#define KEYSZ 32 +#define IVSZ 8 +#define BLOCKSZ 64 +#define RSBUFSZ (16*BLOCKSZ) +static int rs_initialized; +static pid_t rs_stir_pid; +static chacha_ctx rs; /* chacha context for random keystream */ +static u_char rs_buf[RSBUFSZ]; /* keystream blocks */ +static size_t rs_have; /* valid bytes at end of rs_buf */ +static size_t rs_count; /* bytes till reseed */ + +static inline void _rs_rekey(u_char *dat, size_t datlen); + +static inline void +_rs_init(u_char *buf, size_t n) +{ + if (n < KEYSZ + IVSZ) + return; + chacha_keysetup(&rs, buf, KEYSZ * 8, 0); + chacha_ivsetup(&rs, buf + KEYSZ); +} + +#ifndef WITH_OPENSSL +#define SSH_RANDOM_DEV "/dev/urandom" +/* XXX use getrandom() if supported on Linux */ +static void +getrnd(u_char *s, size_t len) +{ + int fd; + ssize_t r; + size_t o = 0; + + if ((fd = open(SSH_RANDOM_DEV, O_RDONLY)) == -1) + fatal("Couldn't open %s: %s", SSH_RANDOM_DEV, strerror(errno)); + while (o < len) { + r = read(fd, s + o, len - o); + if (r < 0) { + if (errno == EAGAIN || errno == EINTR || + errno == EWOULDBLOCK) + continue; + fatal("read %s: %s", SSH_RANDOM_DEV, strerror(errno)); + } + o += r; + } + close(fd); +} +#endif + +static void +_rs_stir(void) +{ + u_char rnd[KEYSZ + IVSZ]; + +#ifdef WITH_OPENSSL + if (RAND_bytes(rnd, sizeof(rnd)) <= 0) + fatal("Couldn't obtain random bytes (error %ld)", + ERR_get_error()); +#else + getrnd(rnd, sizeof(rnd)); +#endif + + if (!rs_initialized) { + rs_initialized = 1; + _rs_init(rnd, sizeof(rnd)); + } else + _rs_rekey(rnd, sizeof(rnd)); + explicit_bzero(rnd, sizeof(rnd)); + + /* invalidate rs_buf */ + rs_have = 0; + memset(rs_buf, 0, RSBUFSZ); + + rs_count = 1600000; +} + +static inline void +_rs_stir_if_needed(size_t len) +{ + pid_t pid = getpid(); + + if (rs_count <= len || !rs_initialized || rs_stir_pid != pid) { + rs_stir_pid = pid; + _rs_stir(); + } else + rs_count -= len; +} + +static inline void +_rs_rekey(u_char *dat, size_t datlen) +{ +#ifndef KEYSTREAM_ONLY + memset(rs_buf, 0,RSBUFSZ); +#endif + /* fill rs_buf with the keystream */ + chacha_encrypt_bytes(&rs, rs_buf, rs_buf, RSBUFSZ); + /* mix in optional user provided data */ + if (dat) { + size_t i, m; + + m = MIN(datlen, KEYSZ + IVSZ); + for (i = 0; i < m; i++) + rs_buf[i] ^= dat[i]; + } + /* immediately reinit for backtracking resistance */ + _rs_init(rs_buf, KEYSZ + IVSZ); + memset(rs_buf, 0, KEYSZ + IVSZ); + rs_have = RSBUFSZ - KEYSZ - IVSZ; +} + +static inline void +_rs_random_buf(void *_buf, size_t n) +{ + u_char *buf = (u_char *)_buf; + size_t m; + + _rs_stir_if_needed(n); + while (n > 0) { + if (rs_have > 0) { + m = MIN(n, rs_have); + memcpy(buf, rs_buf + RSBUFSZ - rs_have, m); + memset(rs_buf + RSBUFSZ - rs_have, 0, m); + buf += m; + n -= m; + rs_have -= m; + } + if (rs_have == 0) + _rs_rekey(NULL, 0); + } +} + +static inline void +_rs_random_u32(u_int32_t *val) +{ + _rs_stir_if_needed(sizeof(*val)); + if (rs_have < sizeof(*val)) + _rs_rekey(NULL, 0); + memcpy(val, rs_buf + RSBUFSZ - rs_have, sizeof(*val)); + memset(rs_buf + RSBUFSZ - rs_have, 0, sizeof(*val)); + rs_have -= sizeof(*val); + return; +} + +void +arc4random_stir(void) +{ + _ARC4_LOCK(); + _rs_stir(); + _ARC4_UNLOCK(); +} + +void +arc4random_addrandom(u_char *dat, int datlen) +{ + int m; + + _ARC4_LOCK(); + if (!rs_initialized) + _rs_stir(); + while (datlen > 0) { + m = MIN(datlen, KEYSZ + IVSZ); + _rs_rekey(dat, m); + dat += m; + datlen -= m; + } + _ARC4_UNLOCK(); +} + +u_int32_t +arc4random(void) +{ + u_int32_t val; + + _ARC4_LOCK(); + _rs_random_u32(&val); + _ARC4_UNLOCK(); + return val; +} + +/* + * If we are providing arc4random, then we can provide a more efficient + * arc4random_buf(). + */ +# ifndef HAVE_ARC4RANDOM_BUF +void +arc4random_buf(void *buf, size_t n) +{ + _ARC4_LOCK(); + _rs_random_buf(buf, n); + _ARC4_UNLOCK(); +} +# endif /* !HAVE_ARC4RANDOM_BUF */ +#endif /* !HAVE_ARC4RANDOM */ + +/* arc4random_buf() that uses platform arc4random() */ +#if !defined(HAVE_ARC4RANDOM_BUF) && defined(HAVE_ARC4RANDOM) +void +arc4random_buf(void *_buf, size_t n) +{ + size_t i; + u_int32_t r = 0; + char *buf = (char *)_buf; + + for (i = 0; i < n; i++) { + if (i % 4 == 0) + r = arc4random(); + buf[i] = r & 0xff; + r >>= 8; + } + explicit_bzero(&r, sizeof(r)); +} +#endif /* !defined(HAVE_ARC4RANDOM_BUF) && defined(HAVE_ARC4RANDOM) */ + +#ifndef HAVE_ARC4RANDOM_UNIFORM +/* + * Calculate a uniformly distributed random number less than upper_bound + * avoiding "modulo bias". + * + * Uniformity is achieved by generating new random numbers until the one + * returned is outside the range [0, 2**32 % upper_bound). This + * guarantees the selected random number will be inside + * [2**32 % upper_bound, 2**32) which maps back to [0, upper_bound) + * after reduction modulo upper_bound. + */ +u_int32_t +arc4random_uniform(u_int32_t upper_bound) +{ + u_int32_t r, min; + + if (upper_bound < 2) + return 0; + + /* 2**32 % x == (2**32 - x) % x */ + min = -upper_bound % upper_bound; + + /* + * This could theoretically loop forever but each retry has + * p > 0.5 (worst case, usually far better) of selecting a + * number inside the range we need, so it should rarely need + * to re-roll. + */ + for (;;) { + r = arc4random(); + if (r >= min) + break; + } + + return r % upper_bound; +} +#endif /* !HAVE_ARC4RANDOM_UNIFORM */ + +#if 0 +/*-------- Test code for i386 --------*/ +#include +#include +int +main(int argc, char **argv) +{ + const int iter = 1000000; + int i; + pctrval v; + + v = rdtsc(); + for (i = 0; i < iter; i++) + arc4random(); + v = rdtsc() - v; + v /= iter; + + printf("%qd cycles\n", v); + exit(0); +} +#endif diff --git a/openbsd-compat/bcrypt_pbkdf.c b/openbsd-compat/bcrypt_pbkdf.c new file mode 100644 index 0000000..0a07f9a --- /dev/null +++ b/openbsd-compat/bcrypt_pbkdf.c @@ -0,0 +1,179 @@ +/* $OpenBSD: bcrypt_pbkdf.c,v 1.13 2015/01/12 03:20:04 tedu Exp $ */ +/* + * Copyright (c) 2013 Ted Unangst + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#ifndef HAVE_BCRYPT_PBKDF + +#include +#include + +#ifdef HAVE_STDLIB_H +# include +#endif +#include + +#ifdef HAVE_BLF_H +# include +#endif + +#include "crypto_api.h" +#ifdef SHA512_DIGEST_LENGTH +# undef SHA512_DIGEST_LENGTH +#endif +#define SHA512_DIGEST_LENGTH crypto_hash_sha512_BYTES + +#define MINIMUM(a,b) (((a) < (b)) ? (a) : (b)) + +/* + * pkcs #5 pbkdf2 implementation using the "bcrypt" hash + * + * The bcrypt hash function is derived from the bcrypt password hashing + * function with the following modifications: + * 1. The input password and salt are preprocessed with SHA512. + * 2. The output length is expanded to 256 bits. + * 3. Subsequently the magic string to be encrypted is lengthened and modifed + * to "OxychromaticBlowfishSwatDynamite" + * 4. The hash function is defined to perform 64 rounds of initial state + * expansion. (More rounds are performed by iterating the hash.) + * + * Note that this implementation pulls the SHA512 operations into the caller + * as a performance optimization. + * + * One modification from official pbkdf2. Instead of outputting key material + * linearly, we mix it. pbkdf2 has a known weakness where if one uses it to + * generate (e.g.) 512 bits of key material for use as two 256 bit keys, an + * attacker can merely run once through the outer loop, but the user + * always runs it twice. Shuffling output bytes requires computing the + * entirety of the key material to assemble any subkey. This is something a + * wise caller could do; we just do it for you. + */ + +#define BCRYPT_WORDS 8 +#define BCRYPT_HASHSIZE (BCRYPT_WORDS * 4) + +static void +bcrypt_hash(u_int8_t *sha2pass, u_int8_t *sha2salt, u_int8_t *out) +{ + blf_ctx state; + u_int8_t ciphertext[BCRYPT_HASHSIZE] = + "OxychromaticBlowfishSwatDynamite"; + uint32_t cdata[BCRYPT_WORDS]; + int i; + uint16_t j; + size_t shalen = SHA512_DIGEST_LENGTH; + + /* key expansion */ + Blowfish_initstate(&state); + Blowfish_expandstate(&state, sha2salt, shalen, sha2pass, shalen); + for (i = 0; i < 64; i++) { + Blowfish_expand0state(&state, sha2salt, shalen); + Blowfish_expand0state(&state, sha2pass, shalen); + } + + /* encryption */ + j = 0; + for (i = 0; i < BCRYPT_WORDS; i++) + cdata[i] = Blowfish_stream2word(ciphertext, sizeof(ciphertext), + &j); + for (i = 0; i < 64; i++) + blf_enc(&state, cdata, sizeof(cdata) / sizeof(uint64_t)); + + /* copy out */ + for (i = 0; i < BCRYPT_WORDS; i++) { + out[4 * i + 3] = (cdata[i] >> 24) & 0xff; + out[4 * i + 2] = (cdata[i] >> 16) & 0xff; + out[4 * i + 1] = (cdata[i] >> 8) & 0xff; + out[4 * i + 0] = cdata[i] & 0xff; + } + + /* zap */ + explicit_bzero(ciphertext, sizeof(ciphertext)); + explicit_bzero(cdata, sizeof(cdata)); + explicit_bzero(&state, sizeof(state)); +} + +int +bcrypt_pbkdf(const char *pass, size_t passlen, const u_int8_t *salt, size_t saltlen, + u_int8_t *key, size_t keylen, unsigned int rounds) +{ + u_int8_t sha2pass[SHA512_DIGEST_LENGTH]; + u_int8_t sha2salt[SHA512_DIGEST_LENGTH]; + u_int8_t out[BCRYPT_HASHSIZE]; + u_int8_t tmpout[BCRYPT_HASHSIZE]; + u_int8_t *countsalt; + size_t i, j, amt, stride; + uint32_t count; + size_t origkeylen = keylen; + + /* nothing crazy */ + if (rounds < 1) + return -1; + if (passlen == 0 || saltlen == 0 || keylen == 0 || + keylen > sizeof(out) * sizeof(out) || saltlen > 1<<20) + return -1; + if ((countsalt = calloc(1, saltlen + 4)) == NULL) + return -1; + stride = (keylen + sizeof(out) - 1) / sizeof(out); + amt = (keylen + stride - 1) / stride; + + memcpy(countsalt, salt, saltlen); + + /* collapse password */ + crypto_hash_sha512(sha2pass, pass, passlen); + + /* generate key, sizeof(out) at a time */ + for (count = 1; keylen > 0; count++) { + countsalt[saltlen + 0] = (count >> 24) & 0xff; + countsalt[saltlen + 1] = (count >> 16) & 0xff; + countsalt[saltlen + 2] = (count >> 8) & 0xff; + countsalt[saltlen + 3] = count & 0xff; + + /* first round, salt is salt */ + crypto_hash_sha512(sha2salt, countsalt, saltlen + 4); + + bcrypt_hash(sha2pass, sha2salt, tmpout); + memcpy(out, tmpout, sizeof(out)); + + for (i = 1; i < rounds; i++) { + /* subsequent rounds, salt is previous output */ + crypto_hash_sha512(sha2salt, tmpout, sizeof(tmpout)); + bcrypt_hash(sha2pass, sha2salt, tmpout); + for (j = 0; j < sizeof(out); j++) + out[j] ^= tmpout[j]; + } + + /* + * pbkdf2 deviation: output the key material non-linearly. + */ + amt = MINIMUM(amt, keylen); + for (i = 0; i < amt; i++) { + size_t dest = i * stride + (count - 1); + if (dest >= origkeylen) + break; + key[dest] = out[i]; + } + keylen -= i; + } + + /* zap */ + explicit_bzero(out, sizeof(out)); + free(countsalt); + + return 0; +} +#endif /* HAVE_BCRYPT_PBKDF */ diff --git a/openbsd-compat/blf.h b/openbsd-compat/blf.h new file mode 100644 index 0000000..f1ac5a5 --- /dev/null +++ b/openbsd-compat/blf.h @@ -0,0 +1,88 @@ +/* $OpenBSD: blf.h,v 1.7 2007/03/14 17:59:41 grunk Exp $ */ +/* + * Blowfish - a fast block cipher designed by Bruce Schneier + * + * Copyright 1997 Niels Provos + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Niels Provos. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _BLF_H_ +#define _BLF_H_ + +#include "includes.h" + +#if !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) + +/* Schneier specifies a maximum key length of 56 bytes. + * This ensures that every key bit affects every cipher + * bit. However, the subkeys can hold up to 72 bytes. + * Warning: For normal blowfish encryption only 56 bytes + * of the key affect all cipherbits. + */ + +#define BLF_N 16 /* Number of Subkeys */ +#define BLF_MAXKEYLEN ((BLF_N-2)*4) /* 448 bits */ +#define BLF_MAXUTILIZED ((BLF_N+2)*4) /* 576 bits */ + +/* Blowfish context */ +typedef struct BlowfishContext { + u_int32_t S[4][256]; /* S-Boxes */ + u_int32_t P[BLF_N + 2]; /* Subkeys */ +} blf_ctx; + +/* Raw access to customized Blowfish + * blf_key is just: + * Blowfish_initstate( state ) + * Blowfish_expand0state( state, key, keylen ) + */ + +void Blowfish_encipher(blf_ctx *, u_int32_t *, u_int32_t *); +void Blowfish_decipher(blf_ctx *, u_int32_t *, u_int32_t *); +void Blowfish_initstate(blf_ctx *); +void Blowfish_expand0state(blf_ctx *, const u_int8_t *, u_int16_t); +void Blowfish_expandstate +(blf_ctx *, const u_int8_t *, u_int16_t, const u_int8_t *, u_int16_t); + +/* Standard Blowfish */ + +void blf_key(blf_ctx *, const u_int8_t *, u_int16_t); +void blf_enc(blf_ctx *, u_int32_t *, u_int16_t); +void blf_dec(blf_ctx *, u_int32_t *, u_int16_t); + +void blf_ecb_encrypt(blf_ctx *, u_int8_t *, u_int32_t); +void blf_ecb_decrypt(blf_ctx *, u_int8_t *, u_int32_t); + +void blf_cbc_encrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t); +void blf_cbc_decrypt(blf_ctx *, u_int8_t *, u_int8_t *, u_int32_t); + +/* Converts u_int8_t to u_int32_t */ +u_int32_t Blowfish_stream2word(const u_int8_t *, u_int16_t , u_int16_t *); + +#endif /* !defined(HAVE_BCRYPT_PBKDF) && !defined(HAVE_BLH_H) */ +#endif /* _BLF_H */ + diff --git a/openbsd-compat/blowfish.c b/openbsd-compat/blowfish.c new file mode 100644 index 0000000..e10f7e7 --- /dev/null +++ b/openbsd-compat/blowfish.c @@ -0,0 +1,696 @@ +/* $OpenBSD: blowfish.c,v 1.18 2004/11/02 17:23:26 hshoexer Exp $ */ +/* + * Blowfish block cipher for OpenBSD + * Copyright 1997 Niels Provos + * All rights reserved. + * + * Implementation advice by David Mazieres . + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Niels Provos. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * This code is derived from section 14.3 and the given source + * in section V of Applied Cryptography, second edition. + * Blowfish is an unpatented fast block cipher designed by + * Bruce Schneier. + */ + +#include "includes.h" + +#if !defined(HAVE_BCRYPT_PBKDF) && (!defined(HAVE_BLOWFISH_INITSTATE) || \ + !defined(HAVE_BLOWFISH_EXPAND0STATE) || !defined(HAVE_BLF_ENC)) + +#if 0 +#include /* used for debugging */ +#include +#endif + +#include +#ifdef HAVE_BLF_H +#include +#endif + +#undef inline +#ifdef __GNUC__ +#define inline __inline +#else /* !__GNUC__ */ +#define inline +#endif /* !__GNUC__ */ + +/* Function for Feistel Networks */ + +#define F(s, x) ((((s)[ (((x)>>24)&0xFF)] \ + + (s)[0x100 + (((x)>>16)&0xFF)]) \ + ^ (s)[0x200 + (((x)>> 8)&0xFF)]) \ + + (s)[0x300 + ( (x) &0xFF)]) + +#define BLFRND(s,p,i,j,n) (i ^= F(s,j) ^ (p)[n]) + +void +Blowfish_encipher(blf_ctx *c, u_int32_t *xl, u_int32_t *xr) +{ + u_int32_t Xl; + u_int32_t Xr; + u_int32_t *s = c->S[0]; + u_int32_t *p = c->P; + + Xl = *xl; + Xr = *xr; + + Xl ^= p[0]; + BLFRND(s, p, Xr, Xl, 1); BLFRND(s, p, Xl, Xr, 2); + BLFRND(s, p, Xr, Xl, 3); BLFRND(s, p, Xl, Xr, 4); + BLFRND(s, p, Xr, Xl, 5); BLFRND(s, p, Xl, Xr, 6); + BLFRND(s, p, Xr, Xl, 7); BLFRND(s, p, Xl, Xr, 8); + BLFRND(s, p, Xr, Xl, 9); BLFRND(s, p, Xl, Xr, 10); + BLFRND(s, p, Xr, Xl, 11); BLFRND(s, p, Xl, Xr, 12); + BLFRND(s, p, Xr, Xl, 13); BLFRND(s, p, Xl, Xr, 14); + BLFRND(s, p, Xr, Xl, 15); BLFRND(s, p, Xl, Xr, 16); + + *xl = Xr ^ p[17]; + *xr = Xl; +} + +void +Blowfish_decipher(blf_ctx *c, u_int32_t *xl, u_int32_t *xr) +{ + u_int32_t Xl; + u_int32_t Xr; + u_int32_t *s = c->S[0]; + u_int32_t *p = c->P; + + Xl = *xl; + Xr = *xr; + + Xl ^= p[17]; + BLFRND(s, p, Xr, Xl, 16); BLFRND(s, p, Xl, Xr, 15); + BLFRND(s, p, Xr, Xl, 14); BLFRND(s, p, Xl, Xr, 13); + BLFRND(s, p, Xr, Xl, 12); BLFRND(s, p, Xl, Xr, 11); + BLFRND(s, p, Xr, Xl, 10); BLFRND(s, p, Xl, Xr, 9); + BLFRND(s, p, Xr, Xl, 8); BLFRND(s, p, Xl, Xr, 7); + BLFRND(s, p, Xr, Xl, 6); BLFRND(s, p, Xl, Xr, 5); + BLFRND(s, p, Xr, Xl, 4); BLFRND(s, p, Xl, Xr, 3); + BLFRND(s, p, Xr, Xl, 2); BLFRND(s, p, Xl, Xr, 1); + + *xl = Xr ^ p[0]; + *xr = Xl; +} + +void +Blowfish_initstate(blf_ctx *c) +{ + /* P-box and S-box tables initialized with digits of Pi */ + + static const blf_ctx initstate = + { { + { + 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, + 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99, + 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16, + 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, + 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee, + 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013, + 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, + 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e, + 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60, + 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, + 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce, + 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a, + 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, + 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677, + 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193, + 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, + 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88, + 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239, + 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, + 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0, + 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3, + 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, + 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88, + 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe, + 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, + 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d, + 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b, + 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, + 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba, + 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463, + 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, + 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09, + 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3, + 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, + 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279, + 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8, + 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, + 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82, + 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db, + 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, + 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0, + 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b, + 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, + 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8, + 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4, + 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, + 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7, + 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c, + 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, + 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1, + 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299, + 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, + 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477, + 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf, + 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, + 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af, + 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa, + 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, + 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41, + 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915, + 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, + 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915, + 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664, + 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a}, + { + 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623, + 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266, + 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, + 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e, + 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6, + 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, + 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e, + 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1, + 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, + 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8, + 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff, + 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, + 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701, + 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7, + 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, + 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331, + 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf, + 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, + 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e, + 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87, + 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, + 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2, + 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16, + 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, + 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b, + 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509, + 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, + 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3, + 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f, + 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, + 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4, + 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960, + 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, + 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28, + 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802, + 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, + 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510, + 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf, + 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, + 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e, + 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50, + 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, + 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8, + 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281, + 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, + 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696, + 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128, + 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, + 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0, + 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0, + 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, + 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250, + 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3, + 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, + 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00, + 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061, + 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, + 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e, + 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735, + 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, + 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9, + 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340, + 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, + 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7}, + { + 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934, + 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, + 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af, + 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840, + 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, + 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504, + 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a, + 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, + 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee, + 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6, + 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, + 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b, + 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2, + 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, + 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527, + 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b, + 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, + 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c, + 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3, + 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, + 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17, + 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564, + 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, + 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115, + 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922, + 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, + 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0, + 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e, + 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, + 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d, + 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804, + 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, + 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3, + 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb, + 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, + 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c, + 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350, + 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, + 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a, + 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe, + 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, + 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc, + 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f, + 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, + 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2, + 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9, + 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, + 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c, + 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e, + 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, + 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10, + 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169, + 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, + 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027, + 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5, + 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, + 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634, + 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76, + 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, + 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc, + 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4, + 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, + 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837, + 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0}, + { + 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, + 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe, + 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b, + 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, + 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8, + 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6, + 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, + 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22, + 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4, + 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, + 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9, + 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59, + 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, + 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51, + 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28, + 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, + 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b, + 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28, + 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, + 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd, + 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a, + 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, + 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb, + 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f, + 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, + 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32, + 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680, + 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, + 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae, + 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb, + 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, + 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47, + 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370, + 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, + 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84, + 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048, + 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, + 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd, + 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9, + 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, + 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38, + 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f, + 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, + 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525, + 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1, + 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, + 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964, + 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e, + 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, + 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d, + 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f, + 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, + 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02, + 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc, + 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, + 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a, + 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6, + 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, + 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0, + 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060, + 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, + 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9, + 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f, + 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6} + }, + { + 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, + 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89, + 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c, + 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, + 0x9216d5d9, 0x8979fb1b + } }; + + *c = initstate; +} + +u_int32_t +Blowfish_stream2word(const u_int8_t *data, u_int16_t databytes, + u_int16_t *current) +{ + u_int8_t i; + u_int16_t j; + u_int32_t temp; + + temp = 0x00000000; + j = *current; + + for (i = 0; i < 4; i++, j++) { + if (j >= databytes) + j = 0; + temp = (temp << 8) | data[j]; + } + + *current = j; + return temp; +} + +void +Blowfish_expand0state(blf_ctx *c, const u_int8_t *key, u_int16_t keybytes) +{ + u_int16_t i; + u_int16_t j; + u_int16_t k; + u_int32_t temp; + u_int32_t datal; + u_int32_t datar; + + j = 0; + for (i = 0; i < BLF_N + 2; i++) { + /* Extract 4 int8 to 1 int32 from keystream */ + temp = Blowfish_stream2word(key, keybytes, &j); + c->P[i] = c->P[i] ^ temp; + } + + j = 0; + datal = 0x00000000; + datar = 0x00000000; + for (i = 0; i < BLF_N + 2; i += 2) { + Blowfish_encipher(c, &datal, &datar); + + c->P[i] = datal; + c->P[i + 1] = datar; + } + + for (i = 0; i < 4; i++) { + for (k = 0; k < 256; k += 2) { + Blowfish_encipher(c, &datal, &datar); + + c->S[i][k] = datal; + c->S[i][k + 1] = datar; + } + } +} + + +void +Blowfish_expandstate(blf_ctx *c, const u_int8_t *data, u_int16_t databytes, + const u_int8_t *key, u_int16_t keybytes) +{ + u_int16_t i; + u_int16_t j; + u_int16_t k; + u_int32_t temp; + u_int32_t datal; + u_int32_t datar; + + j = 0; + for (i = 0; i < BLF_N + 2; i++) { + /* Extract 4 int8 to 1 int32 from keystream */ + temp = Blowfish_stream2word(key, keybytes, &j); + c->P[i] = c->P[i] ^ temp; + } + + j = 0; + datal = 0x00000000; + datar = 0x00000000; + for (i = 0; i < BLF_N + 2; i += 2) { + datal ^= Blowfish_stream2word(data, databytes, &j); + datar ^= Blowfish_stream2word(data, databytes, &j); + Blowfish_encipher(c, &datal, &datar); + + c->P[i] = datal; + c->P[i + 1] = datar; + } + + for (i = 0; i < 4; i++) { + for (k = 0; k < 256; k += 2) { + datal ^= Blowfish_stream2word(data, databytes, &j); + datar ^= Blowfish_stream2word(data, databytes, &j); + Blowfish_encipher(c, &datal, &datar); + + c->S[i][k] = datal; + c->S[i][k + 1] = datar; + } + } + +} + +void +blf_key(blf_ctx *c, const u_int8_t *k, u_int16_t len) +{ + /* Initialize S-boxes and subkeys with Pi */ + Blowfish_initstate(c); + + /* Transform S-boxes and subkeys with key */ + Blowfish_expand0state(c, k, len); +} + +void +blf_enc(blf_ctx *c, u_int32_t *data, u_int16_t blocks) +{ + u_int32_t *d; + u_int16_t i; + + d = data; + for (i = 0; i < blocks; i++) { + Blowfish_encipher(c, d, d + 1); + d += 2; + } +} + +void +blf_dec(blf_ctx *c, u_int32_t *data, u_int16_t blocks) +{ + u_int32_t *d; + u_int16_t i; + + d = data; + for (i = 0; i < blocks; i++) { + Blowfish_decipher(c, d, d + 1); + d += 2; + } +} + +void +blf_ecb_encrypt(blf_ctx *c, u_int8_t *data, u_int32_t len) +{ + u_int32_t l, r; + u_int32_t i; + + for (i = 0; i < len; i += 8) { + l = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]; + r = data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]; + Blowfish_encipher(c, &l, &r); + data[0] = l >> 24 & 0xff; + data[1] = l >> 16 & 0xff; + data[2] = l >> 8 & 0xff; + data[3] = l & 0xff; + data[4] = r >> 24 & 0xff; + data[5] = r >> 16 & 0xff; + data[6] = r >> 8 & 0xff; + data[7] = r & 0xff; + data += 8; + } +} + +void +blf_ecb_decrypt(blf_ctx *c, u_int8_t *data, u_int32_t len) +{ + u_int32_t l, r; + u_int32_t i; + + for (i = 0; i < len; i += 8) { + l = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]; + r = data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]; + Blowfish_decipher(c, &l, &r); + data[0] = l >> 24 & 0xff; + data[1] = l >> 16 & 0xff; + data[2] = l >> 8 & 0xff; + data[3] = l & 0xff; + data[4] = r >> 24 & 0xff; + data[5] = r >> 16 & 0xff; + data[6] = r >> 8 & 0xff; + data[7] = r & 0xff; + data += 8; + } +} + +void +blf_cbc_encrypt(blf_ctx *c, u_int8_t *iv, u_int8_t *data, u_int32_t len) +{ + u_int32_t l, r; + u_int32_t i, j; + + for (i = 0; i < len; i += 8) { + for (j = 0; j < 8; j++) + data[j] ^= iv[j]; + l = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]; + r = data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]; + Blowfish_encipher(c, &l, &r); + data[0] = l >> 24 & 0xff; + data[1] = l >> 16 & 0xff; + data[2] = l >> 8 & 0xff; + data[3] = l & 0xff; + data[4] = r >> 24 & 0xff; + data[5] = r >> 16 & 0xff; + data[6] = r >> 8 & 0xff; + data[7] = r & 0xff; + iv = data; + data += 8; + } +} + +void +blf_cbc_decrypt(blf_ctx *c, u_int8_t *iva, u_int8_t *data, u_int32_t len) +{ + u_int32_t l, r; + u_int8_t *iv; + u_int32_t i, j; + + iv = data + len - 16; + data = data + len - 8; + for (i = len - 8; i >= 8; i -= 8) { + l = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]; + r = data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]; + Blowfish_decipher(c, &l, &r); + data[0] = l >> 24 & 0xff; + data[1] = l >> 16 & 0xff; + data[2] = l >> 8 & 0xff; + data[3] = l & 0xff; + data[4] = r >> 24 & 0xff; + data[5] = r >> 16 & 0xff; + data[6] = r >> 8 & 0xff; + data[7] = r & 0xff; + for (j = 0; j < 8; j++) + data[j] ^= iv[j]; + iv -= 8; + data -= 8; + } + l = data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3]; + r = data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]; + Blowfish_decipher(c, &l, &r); + data[0] = l >> 24 & 0xff; + data[1] = l >> 16 & 0xff; + data[2] = l >> 8 & 0xff; + data[3] = l & 0xff; + data[4] = r >> 24 & 0xff; + data[5] = r >> 16 & 0xff; + data[6] = r >> 8 & 0xff; + data[7] = r & 0xff; + for (j = 0; j < 8; j++) + data[j] ^= iva[j]; +} + +#if 0 +void +report(u_int32_t data[], u_int16_t len) +{ + u_int16_t i; + for (i = 0; i < len; i += 2) + printf("Block %0hd: %08lx %08lx.\n", + i / 2, data[i], data[i + 1]); +} +void +main(void) +{ + + blf_ctx c; + char key[] = "AAAAA"; + char key2[] = "abcdefghijklmnopqrstuvwxyz"; + + u_int32_t data[10]; + u_int32_t data2[] = + {0x424c4f57l, 0x46495348l}; + + u_int16_t i; + + /* First test */ + for (i = 0; i < 10; i++) + data[i] = i; + + blf_key(&c, (u_int8_t *) key, 5); + blf_enc(&c, data, 5); + blf_dec(&c, data, 1); + blf_dec(&c, data + 2, 4); + printf("Should read as 0 - 9.\n"); + report(data, 10); + + /* Second test */ + blf_key(&c, (u_int8_t *) key2, strlen(key2)); + blf_enc(&c, data2, 1); + printf("\nShould read as: 0x324ed0fe 0xf413a203.\n"); + report(data2, 2); + blf_dec(&c, data2, 1); + report(data2, 2); +} +#endif + +#endif /* !defined(HAVE_BCRYPT_PBKDF) && (!defined(HAVE_BLOWFISH_INITSTATE) || \ + !defined(HAVE_BLOWFISH_EXPAND0STATE) || !defined(HAVE_BLF_ENC)) */ + diff --git a/openbsd-compat/bsd-closefrom.c b/openbsd-compat/bsd-closefrom.c index 847e278..79ae140 100644 --- a/openbsd-compat/bsd-closefrom.c +++ b/openbsd-compat/bsd-closefrom.c @@ -55,6 +55,7 @@ #define getdtablesize() FD_SETSIZE #endif + #if 0 __unused static const char rcsid[] = "$Sudo: closefrom.c,v 1.11 2006/08/17 15:26:54 millert Exp $"; #endif /* lint */ @@ -102,7 +103,6 @@ closefrom(int lowfd) #else maxfd = getdtablesize(); #endif /* HAVE_SYSCONF */ - if (maxfd < 0) maxfd = OPEN_MAX; diff --git a/openbsd-compat/bsd-cygwin_util.c b/openbsd-compat/bsd-cygwin_util.c index 9eedc88..8672ccf 100644 --- a/openbsd-compat/bsd-cygwin_util.c +++ b/openbsd-compat/bsd-cygwin_util.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2000, 2001, 2011 Corinna Vinschen + * Copyright (c) 2000, 2001, 2011, 2013 Corinna Vinschen * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -27,20 +27,15 @@ * binary mode on Windows systems. */ +#define NO_BINARY_OPEN /* Avoid redefining open to binary_open for this file */ #include "includes.h" #ifdef HAVE_CYGWIN -#if defined(open) && open == binary_open -# undef open -#endif - #include - #include -#include +#include #include -#include #include "xmalloc.h" @@ -62,6 +57,22 @@ check_ntsec(const char *filename) return (pathconf(filename, _PC_POSIX_PERMISSIONS)); } +const char * +cygwin_ssh_privsep_user() +{ + static char cyg_privsep_user[DNLEN + UNLEN + 2]; + + if (!cyg_privsep_user[0]) + { +#ifdef CW_CYGNAME_FROM_WINNAME + if (cygwin_internal (CW_CYGNAME_FROM_WINNAME, "sshd", cyg_privsep_user, + sizeof cyg_privsep_user) != 0) +#endif + strlcpy(cyg_privsep_user, "sshd", sizeof(cyg_privsep_user)); + } + return cyg_privsep_user; +} + #define NL(x) x, (sizeof (x) - 1) #define WENV_SIZ (sizeof (wenv_arr) / sizeof (wenv_arr[0])) @@ -76,6 +87,7 @@ static struct wenv { { NL("OS=") }, { NL("PATH=") }, { NL("PATHEXT=") }, + { NL("PROGRAMFILES=") }, { NL("SYSTEMDRIVE=") }, { NL("SYSTEMROOT=") }, { NL("WINDIR=") } @@ -101,7 +113,7 @@ fetch_windows_environment(void) void free_windows_environment(char **p) { - xfree(p); + free(p); } #endif /* HAVE_CYGWIN */ diff --git a/openbsd-compat/bsd-cygwin_util.h b/openbsd-compat/bsd-cygwin_util.h index 48f64b7..79cb2a1 100644 --- a/openbsd-compat/bsd-cygwin_util.h +++ b/openbsd-compat/bsd-cygwin_util.h @@ -1,7 +1,7 @@ -/* $Id: bsd-cygwin_util.h,v 1.13 2011/08/17 01:31:09 djm Exp $ */ +/* $Id: bsd-cygwin_util.h,v 1.18 2014/05/27 04:34:43 djm Exp $ */ /* - * Copyright (c) 2000, 2001, 2011 Corinna Vinschen + * Copyright (c) 2000, 2001, 2011, 2013 Corinna Vinschen * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -36,16 +36,31 @@ #undef ERROR -#include +/* Avoid including windows headers. */ +typedef void *HANDLE; +#define INVALID_HANDLE_VALUE ((HANDLE) -1) +#define DNLEN 16 +#define UNLEN 256 + +/* Cygwin functions for which declarations are only available when including + windows headers, so we have to define them here explicitely. */ +extern HANDLE cygwin_logon_user (const struct passwd *, const char *); +extern void cygwin_set_impersonation_token (const HANDLE); + #include #include +#define CYGWIN_SSH_PRIVSEP_USER (cygwin_ssh_privsep_user()) +const char *cygwin_ssh_privsep_user(); + int binary_open(const char *, int , ...); int check_ntsec(const char *); char **fetch_windows_environment(void); void free_windows_environment(char **); +#ifndef NO_BINARY_OPEN #define open binary_open +#endif #endif /* HAVE_CYGWIN */ diff --git a/openbsd-compat/bsd-misc.c b/openbsd-compat/bsd-misc.c index 5bb3078..c459906 100644 --- a/openbsd-compat/bsd-misc.c +++ b/openbsd-compat/bsd-misc.c @@ -28,10 +28,9 @@ #include #include #include +#include #include -#include "xmalloc.h" - #ifndef HAVE___PROGNAME char *__progname; #endif @@ -42,13 +41,12 @@ char *__progname; */ char *ssh_get_progname(char *argv0) { + char *p, *q; #ifdef HAVE___PROGNAME extern char *__progname; - return xstrdup(__progname); + p = __progname; #else - char *p; - if (argv0 == NULL) return ("unknown"); /* XXX */ p = strrchr(argv0, '/'); @@ -56,9 +54,12 @@ char *ssh_get_progname(char *argv0) p = argv0; else p++; - - return (xstrdup(p)); #endif + if ((q = strdup(p)) == NULL) { + perror("strdup"); + exit(1); + } + return q; } #ifndef HAVE_SETLOGIN @@ -164,6 +165,18 @@ int nanosleep(const struct timespec *req, struct timespec *rem) return(rc); } #endif +#ifndef WIN32_FIXME +#if !defined(HAVE_USLEEP) +int usleep(unsigned int useconds) +{ + struct timespec ts; + + ts.tv_sec = useconds / 1000000; + ts.tv_nsec = (useconds % 1000000) * 1000; + return nanosleep(&ts, NULL); +} +#endif +#endif #ifndef HAVE_TCGETPGRP pid_t @@ -244,8 +257,25 @@ strdup(const char *str) #endif #ifndef HAVE_ISBLANK -int isblank(int c) +int +isblank(int c) { return (c == ' ' || c == '\t'); } #endif + +#ifndef HAVE_GETPGID +pid_t +getpgid(pid_t pid) +{ +#if defined(HAVE_GETPGRP) && !defined(GETPGRP_VOID) + return getpgrp(pid); +#elif defined(HAVE_GETPGRP) + if (pid == 0) + return getpgrp(); +#endif + + errno = ESRCH; + return -1; +} +#endif diff --git a/openbsd-compat/bsd-misc.h b/openbsd-compat/bsd-misc.h index 11482a5..bbc6441 100644 --- a/openbsd-compat/bsd-misc.h +++ b/openbsd-compat/bsd-misc.h @@ -1,4 +1,4 @@ -/* $Id: bsd-misc.h,v 1.19 2010/11/08 22:26:23 tim Exp $ */ +/* $Id: bsd-misc.h,v 1.25 2013/08/04 11:48:41 dtucker Exp $ */ /* * Copyright (c) 1999-2004 Damien Miller @@ -51,6 +51,9 @@ int setegid(uid_t); const char *strerror(int); #endif +#if !defined(HAVE_SETLINEBUF) +#define setlinebuf(a) (setvbuf((a), NULL, _IOLBF, 0)) +#endif #ifndef HAVE_UTIMES #ifndef HAVE_STRUCT_TIMEVAL @@ -77,6 +80,10 @@ struct timespec { int nanosleep(const struct timespec *, struct timespec *); #endif +#ifndef HAVE_USLEEP +int usleep(unsigned int useconds); +#endif + #ifndef HAVE_TCGETPGRP pid_t tcgetpgrp(int); #endif @@ -86,7 +93,7 @@ int tcsendbreak(int, int); #endif #ifndef HAVE_UNSETENV -void unsetenv(const char *); +int unsetenv(const char *); #endif /* wrapper for signal interface */ @@ -101,4 +108,20 @@ mysig_t mysignal(int sig, mysig_t act); int isblank(int); #endif +#ifndef HAVE_GETPGID +pid_t getpgid(pid_t); +#endif + +#ifndef HAVE_ENDGRENT +# define endgrent() do { } while(0) +#endif + +#ifndef HAVE_KRB5_GET_ERROR_MESSAGE +# define krb5_get_error_message krb5_get_err_text +#endif + +#ifndef HAVE_KRB5_FREE_ERROR_MESSAGE +# define krb5_free_error_message(a,b) do { } while(0) +#endif + #endif /* _BSD_MISC_H */ diff --git a/openbsd-compat/bsd-poll.c b/openbsd-compat/bsd-poll.c index f899d7a..73a8524 100644 --- a/openbsd-compat/bsd-poll.c +++ b/openbsd-compat/bsd-poll.c @@ -1,4 +1,4 @@ -/* $Id: bsd-poll.c,v 1.4 2008/08/29 21:32:38 dtucker Exp $ */ +/* $Id: bsd-poll.c,v 1.6 2014/02/05 23:44:13 dtucker Exp $ */ /* * Copyright (c) 2004, 2005, 2007 Darren Tucker (dtucker at zip com au). @@ -19,12 +19,15 @@ #include "includes.h" #if !defined(HAVE_POLL) +#include +#include #ifdef HAVE_SYS_SELECT_H # include #endif -#include #include +#include +#include #include "bsd-poll.h" /* @@ -106,12 +109,9 @@ poll(struct pollfd *fds, nfds_t nfds, int timeout) } out: - if (readfds != NULL) - free(readfds); - if (writefds != NULL) - free(writefds); - if (exceptfds != NULL) - free(exceptfds); + free(readfds); + free(writefds); + free(exceptfds); if (ret == -1) errno = saved_errno; return ret; diff --git a/openbsd-compat/bsd-setres_id.c b/openbsd-compat/bsd-setres_id.c new file mode 100644 index 0000000..018bde8 --- /dev/null +++ b/openbsd-compat/bsd-setres_id.c @@ -0,0 +1,100 @@ +/* $Id: bsd-setres_id.c,v 1.2 2013/12/07 21:23:09 djm Exp $ */ + +/* + * Copyright (c) 2012 Darren Tucker (dtucker at zip com au). + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include + +#include +#include +#include + +#include "log.h" + +#if !defined(HAVE_SETRESGID) || defined(BROKEN_SETRESGID) +int +setresgid(gid_t rgid, gid_t egid, gid_t sgid) +{ + int ret = 0, saved_errno; + + if (rgid != sgid) { + errno = ENOSYS; + return -1; + } +#if defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID) + if (setregid(rgid, egid) < 0) { + saved_errno = errno; + error("setregid %u: %.100s", rgid, strerror(errno)); + errno = saved_errno; + ret = -1; + } +#else + if (setegid(egid) < 0) { + saved_errno = errno; + error("setegid %u: %.100s", (u_int)egid, strerror(errno)); + errno = saved_errno; + ret = -1; + } + if (setgid(rgid) < 0) { + saved_errno = errno; + error("setgid %u: %.100s", rgid, strerror(errno)); + errno = saved_errno; + ret = -1; + } +#endif + return ret; +} +#endif + +#if !defined(HAVE_SETRESUID) || defined(BROKEN_SETRESUID) +int +setresuid(uid_t ruid, uid_t euid, uid_t suid) +{ + int ret = 0, saved_errno; + + if (ruid != suid) { + errno = ENOSYS; + return -1; + } +#if defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID) + if (setreuid(ruid, euid) < 0) { + saved_errno = errno; + error("setreuid %u: %.100s", ruid, strerror(errno)); + errno = saved_errno; + ret = -1; + } +#else + +# ifndef SETEUID_BREAKS_SETUID + if (seteuid(euid) < 0) { + saved_errno = errno; + error("seteuid %u: %.100s", euid, strerror(errno)); + errno = saved_errno; + ret = -1; + } +# endif + if (setuid(ruid) < 0) { + saved_errno = errno; + error("setuid %u: %.100s", ruid, strerror(errno)); + errno = saved_errno; + ret = -1; + } +#endif + return ret; +} +#endif diff --git a/openbsd-compat/bsd-setres_id.h b/openbsd-compat/bsd-setres_id.h new file mode 100644 index 0000000..6c269e0 --- /dev/null +++ b/openbsd-compat/bsd-setres_id.h @@ -0,0 +1,24 @@ +/* $Id: bsd-setres_id.h,v 1.1 2012/11/05 06:04:37 dtucker Exp $ */ + +/* + * Copyright (c) 2012 Darren Tucker (dtucker at zip com au). + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef HAVE_SETRESGID +int setresgid(gid_t, gid_t, gid_t); +#endif +#ifndef HAVE_SETRESUID +int setresuid(uid_t, uid_t, uid_t); +#endif diff --git a/openbsd-compat/bsd-snprintf.c b/openbsd-compat/bsd-snprintf.c index 41d2be2..23a6359 100644 --- a/openbsd-compat/bsd-snprintf.c +++ b/openbsd-compat/bsd-snprintf.c @@ -160,6 +160,8 @@ #define DP_C_LONG 2 #define DP_C_LDOUBLE 3 #define DP_C_LLONG 4 +#define DP_C_SIZE 5 +#define DP_C_INTMAX 6 #define char_to_int(p) ((p)- '0') #ifndef MAX @@ -182,7 +184,7 @@ static int dopr(char *buffer, size_t maxlen, const char *format, static int fmtstr(char *buffer, size_t *currlen, size_t maxlen, char *value, int flags, int min, int max); static int fmtint(char *buffer, size_t *currlen, size_t maxlen, - LLONG value, int base, int min, int max, int flags); + intmax_t value, int base, int min, int max, int flags); static int fmtfp(char *buffer, size_t *currlen, size_t maxlen, LDOUBLE fvalue, int min, int max, int flags); @@ -190,7 +192,7 @@ static int dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) { char ch; - LLONG value; + intmax_t value; LDOUBLE fvalue; char *strvalue; int min; @@ -287,6 +289,10 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) cflags = DP_C_SHORT; ch = *format++; break; + case 'j': + cflags = DP_C_INTMAX; + ch = *format++; + break; case 'l': cflags = DP_C_LONG; ch = *format++; @@ -299,6 +305,10 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) cflags = DP_C_LDOUBLE; ch = *format++; break; + case 'z': + cflags = DP_C_SIZE; + ch = *format++; + break; default: break; } @@ -314,6 +324,10 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) value = va_arg (args, long int); else if (cflags == DP_C_LLONG) value = va_arg (args, LLONG); + else if (cflags == DP_C_SIZE) + value = va_arg (args, ssize_t); + else if (cflags == DP_C_INTMAX) + value = va_arg (args, intmax_t); else value = va_arg (args, int); if (fmtint(buffer, &currlen, maxlen, @@ -328,6 +342,12 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) value = (long)va_arg (args, unsigned long int); else if (cflags == DP_C_LLONG) value = (long)va_arg (args, unsigned LLONG); + else if (cflags == DP_C_SIZE) + value = va_arg (args, size_t); +#ifdef notyet + else if (cflags == DP_C_INTMAX) + value = va_arg (args, uintmax_t); +#endif else value = (long)va_arg (args, unsigned int); if (fmtint(buffer, &currlen, maxlen, value, @@ -342,6 +362,12 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) value = (long)va_arg (args, unsigned long int); else if (cflags == DP_C_LLONG) value = (LLONG)va_arg (args, unsigned LLONG); + else if (cflags == DP_C_SIZE) + value = va_arg (args, size_t); +#ifdef notyet + else if (cflags == DP_C_INTMAX) + value = va_arg (args, uintmax_t); +#endif else value = (long)va_arg (args, unsigned int); if (fmtint(buffer, &currlen, maxlen, value, @@ -358,6 +384,12 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) value = (long)va_arg (args, unsigned long int); else if (cflags == DP_C_LLONG) value = (LLONG)va_arg (args, unsigned LLONG); + else if (cflags == DP_C_SIZE) + value = va_arg (args, size_t); +#ifdef notyet + else if (cflags == DP_C_INTMAX) + value = va_arg (args, uintmax_t); +#endif else value = (long)va_arg (args, unsigned int); if (fmtint(buffer, &currlen, maxlen, value, @@ -416,6 +448,7 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) (long) strvalue, 16, min, max, flags) == -1) return -1; break; +#if we_dont_want_this_in_openssh case 'n': if (cflags == DP_C_SHORT) { short int *num; @@ -429,12 +462,21 @@ dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) LLONG *num; num = va_arg (args, LLONG *); *num = (LLONG)currlen; + } else if (cflags == DP_C_SIZE) { + ssize_t *num; + num = va_arg (args, ssize_t *); + *num = (ssize_t)currlen; + } else if (cflags == DP_C_INTMAX) { + intmax_t *num; + num = va_arg (args, intmax_t *); + *num = (intmax_t)currlen; } else { int *num; num = va_arg (args, int *); *num = currlen; } break; +#endif case '%': DOPR_OUTCH(buffer, currlen, maxlen, ch); break; @@ -496,7 +538,7 @@ fmtstr(char *buffer, size_t *currlen, size_t maxlen, } while (*value && (cnt < max)) { DOPR_OUTCH(buffer, *currlen, maxlen, *value); - *value++; + value++; ++cnt; } while ((padlen < 0) && (cnt < max)) { @@ -511,7 +553,7 @@ fmtstr(char *buffer, size_t *currlen, size_t maxlen, static int fmtint(char *buffer, size_t *currlen, size_t maxlen, - LLONG value, int base, int min, int max, int flags) + intmax_t value, int base, int min, int max, int flags) { int signvalue = 0; unsigned LLONG uvalue; diff --git a/openbsd-compat/bsd-statvfs.c b/openbsd-compat/bsd-statvfs.c index e9d0ad4..69bc295 100644 --- a/openbsd-compat/bsd-statvfs.c +++ b/openbsd-compat/bsd-statvfs.c @@ -1,7 +1,7 @@ -/* $Id: bsd-statvfs.c,v 1.1 2008/06/08 17:32:29 dtucker Exp $ */ +/* $Id: bsd-statvfs.c,v 1.2 2014/01/17 07:10:59 dtucker Exp $ */ /* - * Copyright (c) 2008 Darren Tucker + * Copyright (c) 2008,2014 Darren Tucker * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -18,12 +18,40 @@ #include "includes.h" +#if !defined(HAVE_STATVFS) || !defined(HAVE_FSTATVFS) + +#include +#ifdef HAVE_SYS_MOUNT_H +# include +#endif + #include -#ifndef HAVE_STATVFS +static void +copy_statfs_to_statvfs(struct statvfs *to, struct statfs *from) +{ +#ifdef WIN32_FIXME +//PRAGMA:TODO +#else /* WIN32_FIXME */ + + to->f_bsize = from->f_bsize; + to->f_frsize = from->f_bsize; /* no exact equivalent */ + to->f_blocks = from->f_blocks; + to->f_bfree = from->f_bfree; + to->f_bavail = from->f_bavail; + to->f_files = from->f_files; + to->f_ffree = from->f_ffree; + to->f_favail = from->f_ffree; /* no exact equivalent */ + to->f_fsid = 0; /* XXX fix me */ + to->f_flag = from->f_flags; + to->f_namemax = MNAMELEN; +#endif /* !WIN32_FIXME */ +} + +# ifndef HAVE_STATVFS int statvfs(const char *path, struct statvfs *buf) { - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME DWORD sectorsPerCluster; DWORD bytesPerSector; @@ -62,19 +90,40 @@ int statvfs(const char *path, struct statvfs *buf) return -1; } - #else /* WIN32_FIXME */ - +#else /* WIN32_FIXME */ + +# ifdef HAVE_STATFS + struct statfs fs; + + memset(&fs, 0, sizeof(fs)); + if (statfs(path, &fs) == -1) + return -1; + copy_statfs_to_statvfs(buf, &fs); + return 0; +# else errno = ENOSYS; return -1; - - #endif /* !WIN32_FIXME */ +# endif +#endif /* !WIN32_FIXME */ } -#endif +# endif -#ifndef HAVE_FSTATVFS +# ifndef HAVE_FSTATVFS int fstatvfs(int fd, struct statvfs *buf) { +# ifdef HAVE_FSTATFS + struct statfs fs; + + memset(&fs, 0, sizeof(fs)); + if (fstatfs(fd, &fs) == -1) + return -1; + copy_statfs_to_statvfs(buf, &fs); + return 0; +# else errno = ENOSYS; return -1; +# endif } +# endif + #endif diff --git a/openbsd-compat/bsd-statvfs.h b/openbsd-compat/bsd-statvfs.h index da215ff..dfd6099 100644 --- a/openbsd-compat/bsd-statvfs.h +++ b/openbsd-compat/bsd-statvfs.h @@ -1,7 +1,7 @@ -/* $Id: bsd-statvfs.h,v 1.1 2008/06/08 17:32:29 dtucker Exp $ */ +/* $Id: bsd-statvfs.h,v 1.3 2014/01/17 07:48:22 dtucker Exp $ */ /* - * Copyright (c) 2008 Darren Tucker + * Copyright (c) 2008,2014 Darren Tucker * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -18,14 +18,17 @@ #include "includes.h" +#if !defined(HAVE_STATVFS) || !defined(HAVE_FSTATVFS) + #include +#ifdef HAVE_SYS_MOUNT_H +#include +#endif #ifdef HAVE_SYS_STATFS_H #include #endif -#ifndef HAVE_STATVFS - #ifndef HAVE_FSBLKCNT_T typedef unsigned long fsblkcnt_t; #endif diff --git a/openbsd-compat/chacha_private.h b/openbsd-compat/chacha_private.h new file mode 100644 index 0000000..7c3680f --- /dev/null +++ b/openbsd-compat/chacha_private.h @@ -0,0 +1,222 @@ +/* +chacha-merged.c version 20080118 +D. J. Bernstein +Public domain. +*/ + +/* $OpenBSD: chacha_private.h,v 1.2 2013/10/04 07:02:27 djm Exp $ */ + +typedef unsigned char u8; +typedef unsigned int u32; + +typedef struct +{ + u32 input[16]; /* could be compressed */ +} chacha_ctx; + +#define U8C(v) (v##U) +#define U32C(v) (v##U) + +#define U8V(v) ((u8)(v) & U8C(0xFF)) +#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF)) + +#define ROTL32(v, n) \ + (U32V((v) << (n)) | ((v) >> (32 - (n)))) + +#define U8TO32_LITTLE(p) \ + (((u32)((p)[0]) ) | \ + ((u32)((p)[1]) << 8) | \ + ((u32)((p)[2]) << 16) | \ + ((u32)((p)[3]) << 24)) + +#define U32TO8_LITTLE(p, v) \ + do { \ + (p)[0] = U8V((v) ); \ + (p)[1] = U8V((v) >> 8); \ + (p)[2] = U8V((v) >> 16); \ + (p)[3] = U8V((v) >> 24); \ + } while (0) + +#define ROTATE(v,c) (ROTL32(v,c)) +#define XOR(v,w) ((v) ^ (w)) +#define PLUS(v,w) (U32V((v) + (w))) +#define PLUSONE(v) (PLUS((v),1)) + +#define QUARTERROUND(a,b,c,d) \ + a = PLUS(a,b); d = ROTATE(XOR(d,a),16); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c),12); \ + a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c), 7); + +static const char sigma[16] = "expand 32-byte k"; +static const char tau[16] = "expand 16-byte k"; + +static void +chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits,u32 ivbits) +{ + const char *constants; + + x->input[4] = U8TO32_LITTLE(k + 0); + x->input[5] = U8TO32_LITTLE(k + 4); + x->input[6] = U8TO32_LITTLE(k + 8); + x->input[7] = U8TO32_LITTLE(k + 12); + if (kbits == 256) { /* recommended */ + k += 16; + constants = sigma; + } else { /* kbits == 128 */ + constants = tau; + } + x->input[8] = U8TO32_LITTLE(k + 0); + x->input[9] = U8TO32_LITTLE(k + 4); + x->input[10] = U8TO32_LITTLE(k + 8); + x->input[11] = U8TO32_LITTLE(k + 12); + x->input[0] = U8TO32_LITTLE(constants + 0); + x->input[1] = U8TO32_LITTLE(constants + 4); + x->input[2] = U8TO32_LITTLE(constants + 8); + x->input[3] = U8TO32_LITTLE(constants + 12); +} + +static void +chacha_ivsetup(chacha_ctx *x,const u8 *iv) +{ + x->input[12] = 0; + x->input[13] = 0; + x->input[14] = U8TO32_LITTLE(iv + 0); + x->input[15] = U8TO32_LITTLE(iv + 4); +} + +static void +chacha_encrypt_bytes(chacha_ctx *x,const u8 *m,u8 *c,u32 bytes) +{ + u32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15; + u32 j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14, j15; + u8 *ctarget = NULL; + u8 tmp[64]; + u_int i; + + if (!bytes) return; + + j0 = x->input[0]; + j1 = x->input[1]; + j2 = x->input[2]; + j3 = x->input[3]; + j4 = x->input[4]; + j5 = x->input[5]; + j6 = x->input[6]; + j7 = x->input[7]; + j8 = x->input[8]; + j9 = x->input[9]; + j10 = x->input[10]; + j11 = x->input[11]; + j12 = x->input[12]; + j13 = x->input[13]; + j14 = x->input[14]; + j15 = x->input[15]; + + for (;;) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) tmp[i] = m[i]; + m = tmp; + ctarget = c; + c = tmp; + } + x0 = j0; + x1 = j1; + x2 = j2; + x3 = j3; + x4 = j4; + x5 = j5; + x6 = j6; + x7 = j7; + x8 = j8; + x9 = j9; + x10 = j10; + x11 = j11; + x12 = j12; + x13 = j13; + x14 = j14; + x15 = j15; + for (i = 20;i > 0;i -= 2) { + QUARTERROUND( x0, x4, x8,x12) + QUARTERROUND( x1, x5, x9,x13) + QUARTERROUND( x2, x6,x10,x14) + QUARTERROUND( x3, x7,x11,x15) + QUARTERROUND( x0, x5,x10,x15) + QUARTERROUND( x1, x6,x11,x12) + QUARTERROUND( x2, x7, x8,x13) + QUARTERROUND( x3, x4, x9,x14) + } + x0 = PLUS(x0,j0); + x1 = PLUS(x1,j1); + x2 = PLUS(x2,j2); + x3 = PLUS(x3,j3); + x4 = PLUS(x4,j4); + x5 = PLUS(x5,j5); + x6 = PLUS(x6,j6); + x7 = PLUS(x7,j7); + x8 = PLUS(x8,j8); + x9 = PLUS(x9,j9); + x10 = PLUS(x10,j10); + x11 = PLUS(x11,j11); + x12 = PLUS(x12,j12); + x13 = PLUS(x13,j13); + x14 = PLUS(x14,j14); + x15 = PLUS(x15,j15); + +#ifndef KEYSTREAM_ONLY + x0 = XOR(x0,U8TO32_LITTLE(m + 0)); + x1 = XOR(x1,U8TO32_LITTLE(m + 4)); + x2 = XOR(x2,U8TO32_LITTLE(m + 8)); + x3 = XOR(x3,U8TO32_LITTLE(m + 12)); + x4 = XOR(x4,U8TO32_LITTLE(m + 16)); + x5 = XOR(x5,U8TO32_LITTLE(m + 20)); + x6 = XOR(x6,U8TO32_LITTLE(m + 24)); + x7 = XOR(x7,U8TO32_LITTLE(m + 28)); + x8 = XOR(x8,U8TO32_LITTLE(m + 32)); + x9 = XOR(x9,U8TO32_LITTLE(m + 36)); + x10 = XOR(x10,U8TO32_LITTLE(m + 40)); + x11 = XOR(x11,U8TO32_LITTLE(m + 44)); + x12 = XOR(x12,U8TO32_LITTLE(m + 48)); + x13 = XOR(x13,U8TO32_LITTLE(m + 52)); + x14 = XOR(x14,U8TO32_LITTLE(m + 56)); + x15 = XOR(x15,U8TO32_LITTLE(m + 60)); +#endif + + j12 = PLUSONE(j12); + if (!j12) { + j13 = PLUSONE(j13); + /* stopping at 2^70 bytes per nonce is user's responsibility */ + } + + U32TO8_LITTLE(c + 0,x0); + U32TO8_LITTLE(c + 4,x1); + U32TO8_LITTLE(c + 8,x2); + U32TO8_LITTLE(c + 12,x3); + U32TO8_LITTLE(c + 16,x4); + U32TO8_LITTLE(c + 20,x5); + U32TO8_LITTLE(c + 24,x6); + U32TO8_LITTLE(c + 28,x7); + U32TO8_LITTLE(c + 32,x8); + U32TO8_LITTLE(c + 36,x9); + U32TO8_LITTLE(c + 40,x10); + U32TO8_LITTLE(c + 44,x11); + U32TO8_LITTLE(c + 48,x12); + U32TO8_LITTLE(c + 52,x13); + U32TO8_LITTLE(c + 56,x14); + U32TO8_LITTLE(c + 60,x15); + + if (bytes <= 64) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) ctarget[i] = c[i]; + } + x->input[12] = j12; + x->input[13] = j13; + return; + } + bytes -= 64; + c += 64; +#ifndef KEYSTREAM_ONLY + m += 64; +#endif + } +} diff --git a/openbsd-compat/explicit_bzero.c b/openbsd-compat/explicit_bzero.c new file mode 100644 index 0000000..ac4fcc4 --- /dev/null +++ b/openbsd-compat/explicit_bzero.c @@ -0,0 +1,50 @@ +/* OPENBSD ORIGINAL: lib/libc/string/explicit_bzero.c */ +/* $OpenBSD: explicit_bzero.c,v 1.1 2014/01/22 21:06:45 tedu Exp $ */ +/* + * Public domain. + * Written by Ted Unangst + */ + +#include "includes.h" + +/* + * explicit_bzero - don't let the compiler optimize away bzero + */ + +#ifndef HAVE_EXPLICIT_BZERO + +#ifdef HAVE_MEMSET_S + +void +explicit_bzero(void *p, size_t n) +{ + (void)memset_s(p, n, 0, n); +} + +#else /* HAVE_MEMSET_S */ + +#ifdef WIN32_FIXME +void +explicit_bzero(void *p, size_t n) +{ + bzero(p, n); +} +#else + +/* + * Indirect bzero through a volatile pointer to hopefully avoid + * dead-store optimisation eliminating the call. + */ +static void (* volatile ssh_bzero)(void *, size_t) = bzero; + +void +explicit_bzero(void *p, size_t n) +{ + ssh_bzero(p, n); +} + +#endif /* WIN32_FIXME */ + +#endif /* HAVE_MEMSET_S */ + +#endif /* HAVE_EXPLICIT_BZERO */ diff --git a/openbsd-compat/fake-rfc2553.h b/openbsd-compat/fake-rfc2553.h index 3e9090f..6426f7b 100644 --- a/openbsd-compat/fake-rfc2553.h +++ b/openbsd-compat/fake-rfc2553.h @@ -109,6 +109,9 @@ struct sockaddr_in6 { #ifndef AI_NUMERICHOST # define AI_NUMERICHOST (1<<2) #endif +#ifndef AI_NUMERICSERV +# define AI_NUMERICSERV (1<<3) +#endif #ifndef NI_MAXSERV # define NI_MAXSERV 32 diff --git a/openbsd-compat/getcwd.c b/openbsd-compat/getcwd.c index 711cb9c..3edbb9c 100644 --- a/openbsd-compat/getcwd.c +++ b/openbsd-compat/getcwd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: getcwd.c,v 1.14 2005/08/08 08:05:34 espie Exp $ */ +/* from OpenBSD: getcwd.c,v 1.14 2005/08/08 08:05:34 espie Exp */ /* * Copyright (c) 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. diff --git a/openbsd-compat/getgrouplist.c b/openbsd-compat/getgrouplist.c index a57d7d3..3afcb92 100644 --- a/openbsd-compat/getgrouplist.c +++ b/openbsd-compat/getgrouplist.c @@ -1,4 +1,4 @@ -/* $OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp $ */ +/* from OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp */ /* * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. diff --git a/openbsd-compat/getopt.h b/openbsd-compat/getopt.h new file mode 100644 index 0000000..8eb1244 --- /dev/null +++ b/openbsd-compat/getopt.h @@ -0,0 +1,74 @@ +/* $OpenBSD: getopt.h,v 1.2 2008/06/26 05:42:04 ray Exp $ */ +/* $NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $ */ + +/*- + * Copyright (c) 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Dieter Baron and Thomas Klausner. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _GETOPT_H_ +#define _GETOPT_H_ + +/* + * GNU-like getopt_long() and 4.4BSD getsubopt()/optreset extensions + */ +#define no_argument 0 +#define required_argument 1 +#define optional_argument 2 + +struct option { + /* name of long option */ + const char *name; + /* + * one of no_argument, required_argument, and optional_argument: + * whether option takes an argument + */ + int has_arg; + /* if not NULL, set *flag to val when option found */ + int *flag; + /* if flag not NULL, value to set *flag to; else return value */ + int val; +}; + +int getopt_long(int, char * const *, const char *, + const struct option *, int *); +int getopt_long_only(int, char * const *, const char *, + const struct option *, int *); +#ifndef _GETOPT_DEFINED_ +#define _GETOPT_DEFINED_ +int getopt(int, char * const *, const char *); +int getsubopt(char **, char * const *, char **); + +extern char *optarg; /* getopt(3) external variables */ +extern int opterr; +extern int optind; +extern int optopt; +extern int optreset; +extern char *suboptarg; /* getsubopt(3) external variable */ +#endif + +#endif /* !_GETOPT_H_ */ diff --git a/openbsd-compat/getopt_long.c b/openbsd-compat/getopt_long.c new file mode 100644 index 0000000..8b10fad --- /dev/null +++ b/openbsd-compat/getopt_long.c @@ -0,0 +1,536 @@ +/* $OpenBSD: getopt_long.c,v 1.25 2011/03/05 22:10:11 guenther Exp $ */ +/* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $ */ + +/* + * Copyright (c) 2002 Todd C. Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Sponsored in part by the Defense Advanced Research Projects + * Agency (DARPA) and Air Force Research Laboratory, Air Force + * Materiel Command, USAF, under agreement number F39502-99-1-0512. + */ +/*- + * Copyright (c) 2000 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Dieter Baron and Thomas Klausner. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +/* OPENBSD ORIGINAL: lib/libc/stdlib/getopt_long.c */ +#include "includes.h" + +#if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET) + +/* + * Some defines to make it easier to keep the code in sync with upstream. + * getopt opterr optind optopt optreset optarg are all in defines.h which is + * pulled in by includes.h. + */ +#define warnx logit + +#if 0 +#include +#include +#endif +#include +#include +#include +#include + +#ifdef WIN32_FIXME +#include +#endif + +#include "log.h" + +int opterr = 1; /* if error message should be printed */ +int optind = 1; /* index into parent argv vector */ +int optopt = '?'; /* character checked for validity */ +int optreset; /* reset getopt */ +char *optarg; /* argument associated with option */ + +#define PRINT_ERROR ((opterr) && (*options != ':')) + +#define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */ +#define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */ +#define FLAG_LONGONLY 0x04 /* operate as getopt_long_only */ + +/* return values */ +#define BADCH (int)'?' +#define BADARG ((*options == ':') ? (int)':' : (int)'?') +#define INORDER (int)1 + +#define EMSG "" + +static int getopt_internal(int, char * const *, const char *, + const struct option *, int *, int); +static int parse_long_options(char * const *, const char *, + const struct option *, int *, int); +static int gcd(int, int); +static void permute_args(int, int, int, char * const *); + +static char *place = EMSG; /* option letter processing */ + +/* XXX: set optreset to 1 rather than these two */ +static int nonopt_start = -1; /* first non option argument (for permute) */ +static int nonopt_end = -1; /* first option after non options (for permute) */ + +/* Error messages */ +static const char recargchar[] = "option requires an argument -- %c"; +static const char recargstring[] = "option requires an argument -- %s"; +static const char ambig[] = "ambiguous option -- %.*s"; +static const char noarg[] = "option doesn't take an argument -- %.*s"; +static const char illoptchar[] = "unknown option -- %c"; +static const char illoptstring[] = "unknown option -- %s"; + +/* + * Compute the greatest common divisor of a and b. + */ +static int +gcd(int a, int b) +{ + int c; + + c = a % b; + while (c != 0) { + a = b; + b = c; + c = a % b; + } + + return (b); +} + +/* + * Exchange the block from nonopt_start to nonopt_end with the block + * from nonopt_end to opt_end (keeping the same order of arguments + * in each block). + */ +static void +permute_args(int panonopt_start, int panonopt_end, int opt_end, + char * const *nargv) +{ + int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos; + char *swap; + + /* + * compute lengths of blocks and number and size of cycles + */ + nnonopts = panonopt_end - panonopt_start; + nopts = opt_end - panonopt_end; + ncycle = gcd(nnonopts, nopts); + cyclelen = (opt_end - panonopt_start) / ncycle; + + for (i = 0; i < ncycle; i++) { + cstart = panonopt_end+i; + pos = cstart; + for (j = 0; j < cyclelen; j++) { + if (pos >= panonopt_end) + pos -= nnonopts; + else + pos += nopts; + swap = nargv[pos]; + /* LINTED const cast */ + ((char **) nargv)[pos] = nargv[cstart]; + /* LINTED const cast */ + ((char **)nargv)[cstart] = swap; + } + } +} + +/* + * parse_long_options -- + * Parse long options in argc/argv argument vector. + * Returns -1 if short_too is set and the option does not match long_options. + */ +static int +parse_long_options(char * const *nargv, const char *options, + const struct option *long_options, int *idx, int short_too) +{ + char *current_argv, *has_equal; + size_t current_argv_len; + int i, match; + + current_argv = place; + match = -1; + + optind++; + + if ((has_equal = strchr(current_argv, '=')) != NULL) { + /* argument found (--option=arg) */ + current_argv_len = has_equal - current_argv; + has_equal++; + } else + current_argv_len = strlen(current_argv); + + for (i = 0; long_options[i].name; i++) { + /* find matching long option */ + if (strncmp(current_argv, long_options[i].name, + current_argv_len)) + continue; + + if (strlen(long_options[i].name) == current_argv_len) { + /* exact match */ + match = i; + break; + } + /* + * If this is a known short option, don't allow + * a partial match of a single character. + */ + if (short_too && current_argv_len == 1) + continue; + + if (match == -1) /* partial match */ + match = i; + else { + /* ambiguous abbreviation */ + if (PRINT_ERROR) + warnx(ambig, (int)current_argv_len, + current_argv); + optopt = 0; + return (BADCH); + } + } + if (match != -1) { /* option found */ + if (long_options[match].has_arg == no_argument + && has_equal) { + if (PRINT_ERROR) + warnx(noarg, (int)current_argv_len, + current_argv); + /* + * XXX: GNU sets optopt to val regardless of flag + */ + if (long_options[match].flag == NULL) + optopt = long_options[match].val; + else + optopt = 0; + return (BADARG); + } + if (long_options[match].has_arg == required_argument || + long_options[match].has_arg == optional_argument) { + if (has_equal) + optarg = has_equal; + else if (long_options[match].has_arg == + required_argument) { + /* + * optional argument doesn't use next nargv + */ + optarg = nargv[optind++]; + } + } + if ((long_options[match].has_arg == required_argument) + && (optarg == NULL)) { + /* + * Missing argument; leading ':' indicates no error + * should be generated. + */ + if (PRINT_ERROR) + warnx(recargstring, + current_argv); + /* + * XXX: GNU sets optopt to val regardless of flag + */ + if (long_options[match].flag == NULL) + optopt = long_options[match].val; + else + optopt = 0; + --optind; + return (BADARG); + } + } else { /* unknown option */ + if (short_too) { + --optind; + return (-1); + } + if (PRINT_ERROR) + warnx(illoptstring, current_argv); + optopt = 0; + return (BADCH); + } + if (idx) + *idx = match; + if (long_options[match].flag) { + *long_options[match].flag = long_options[match].val; + return (0); + } else + return (long_options[match].val); +} + +/* + * getopt_internal -- + * Parse argc/argv argument vector. Called by user level routines. + */ +static int +getopt_internal(int nargc, char * const *nargv, const char *options, + const struct option *long_options, int *idx, int flags) +{ + char *oli; /* option letter list index */ + int optchar, short_too; + static int posixly_correct = -1; + + if (options == NULL) + return (-1); + + /* + * XXX Some GNU programs (like cvs) set optind to 0 instead of + * XXX using optreset. Work around this braindamage. + */ + if (optind == 0) + optind = optreset = 1; + + /* + * Disable GNU extensions if POSIXLY_CORRECT is set or options + * string begins with a '+'. + */ + if (posixly_correct == -1 || optreset) + posixly_correct = (getenv("POSIXLY_CORRECT") != NULL); + if (*options == '-') + flags |= FLAG_ALLARGS; + else if (posixly_correct || *options == '+') + flags &= ~FLAG_PERMUTE; + if (*options == '+' || *options == '-') + options++; + + optarg = NULL; + if (optreset) + nonopt_start = nonopt_end = -1; +start: + if (optreset || !*place) { /* update scanning pointer */ + optreset = 0; + if (optind >= nargc) { /* end of argument vector */ + place = EMSG; + if (nonopt_end != -1) { + /* do permutation, if we have to */ + permute_args(nonopt_start, nonopt_end, + optind, nargv); + optind -= nonopt_end - nonopt_start; + } + else if (nonopt_start != -1) { + /* + * If we skipped non-options, set optind + * to the first of them. + */ + optind = nonopt_start; + } + nonopt_start = nonopt_end = -1; + return (-1); + } + if (*(place = nargv[optind]) != '-' || + (place[1] == '\0' && strchr(options, '-') == NULL)) { + place = EMSG; /* found non-option */ + if (flags & FLAG_ALLARGS) { + /* + * GNU extension: + * return non-option as argument to option 1 + */ + optarg = nargv[optind++]; + return (INORDER); + } + if (!(flags & FLAG_PERMUTE)) { + /* + * If no permutation wanted, stop parsing + * at first non-option. + */ + return (-1); + } + /* do permutation */ + if (nonopt_start == -1) + nonopt_start = optind; + else if (nonopt_end != -1) { + permute_args(nonopt_start, nonopt_end, + optind, nargv); + nonopt_start = optind - + (nonopt_end - nonopt_start); + nonopt_end = -1; + } + optind++; + /* process next argument */ + goto start; + } + if (nonopt_start != -1 && nonopt_end == -1) + nonopt_end = optind; + + /* + * If we have "-" do nothing, if "--" we are done. + */ + if (place[1] != '\0' && *++place == '-' && place[1] == '\0') { + optind++; + place = EMSG; + /* + * We found an option (--), so if we skipped + * non-options, we have to permute. + */ + if (nonopt_end != -1) { + permute_args(nonopt_start, nonopt_end, + optind, nargv); + optind -= nonopt_end - nonopt_start; + } + nonopt_start = nonopt_end = -1; + return (-1); + } + } + + /* + * Check long options if: + * 1) we were passed some + * 2) the arg is not just "-" + * 3) either the arg starts with -- we are getopt_long_only() + */ + if (long_options != NULL && place != nargv[optind] && + (*place == '-' || (flags & FLAG_LONGONLY))) { + short_too = 0; + if (*place == '-') + place++; /* --foo long option */ + else if (*place != ':' && strchr(options, *place) != NULL) + short_too = 1; /* could be short option too */ + + optchar = parse_long_options(nargv, options, long_options, + idx, short_too); + if (optchar != -1) { + place = EMSG; + return (optchar); + } + } + + if ((optchar = (int)*place++) == (int)':' || + (optchar == (int)'-' && *place != '\0') || + (oli = strchr(options, optchar)) == NULL) { + /* + * If the user specified "-" and '-' isn't listed in + * options, return -1 (non-option) as per POSIX. + * Otherwise, it is an unknown option character (or ':'). + */ + if (optchar == (int)'-' && *place == '\0') + return (-1); + if (!*place) + ++optind; + if (PRINT_ERROR) + warnx(illoptchar, optchar); + optopt = optchar; + return (BADCH); + } + if (long_options != NULL && optchar == 'W' && oli[1] == ';') { + /* -W long-option */ + if (*place) /* no space */ + /* NOTHING */; + else if (++optind >= nargc) { /* no arg */ + place = EMSG; + if (PRINT_ERROR) + warnx(recargchar, optchar); + optopt = optchar; + return (BADARG); + } else /* white space */ + place = nargv[optind]; + optchar = parse_long_options(nargv, options, long_options, + idx, 0); + place = EMSG; + return (optchar); + } + if (*++oli != ':') { /* doesn't take argument */ + if (!*place) + ++optind; + } else { /* takes (optional) argument */ + optarg = NULL; + if (*place) /* no white space */ + optarg = place; + else if (oli[1] != ':') { /* arg not optional */ + if (++optind >= nargc) { /* no arg */ + place = EMSG; + if (PRINT_ERROR) + warnx(recargchar, optchar); + optopt = optchar; + return (BADARG); + } else + optarg = nargv[optind]; + } + place = EMSG; + ++optind; + } + /* dump back option letter */ + return (optchar); +} + +/* + * getopt -- + * Parse argc/argv argument vector. + * + * [eventually this will replace the BSD getopt] + */ +int +getopt(int nargc, char * const *nargv, const char *options) +{ + + /* + * We don't pass FLAG_PERMUTE to getopt_internal() since + * the BSD getopt(3) (unlike GNU) has never done this. + * + * Furthermore, since many privileged programs call getopt() + * before dropping privileges it makes sense to keep things + * as simple (and bug-free) as possible. + */ + return (getopt_internal(nargc, nargv, options, NULL, NULL, 0)); +} + +#if 0 +/* + * getopt_long -- + * Parse argc/argv argument vector. + */ +int +getopt_long(int nargc, char * const *nargv, const char *options, + const struct option *long_options, int *idx) +{ + + return (getopt_internal(nargc, nargv, options, long_options, idx, + FLAG_PERMUTE)); +} + +/* + * getopt_long_only -- + * Parse argc/argv argument vector. + */ +int +getopt_long_only(int nargc, char * const *nargv, const char *options, + const struct option *long_options, int *idx) +{ + + return (getopt_internal(nargc, nargv, options, long_options, idx, + FLAG_PERMUTE|FLAG_LONGONLY)); +} +#endif + +#endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */ diff --git a/openbsd-compat/getrrsetbyname-ldns.c b/openbsd-compat/getrrsetbyname-ldns.c new file mode 100644 index 0000000..4647b62 --- /dev/null +++ b/openbsd-compat/getrrsetbyname-ldns.c @@ -0,0 +1,284 @@ +/* $OpenBSD: getrrsetbyname.c,v 1.10 2005/03/30 02:58:28 tedu Exp $ */ + +/* + * Copyright (c) 2007 Simon Vallet / Genoscope + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Portions Copyright (c) 1999-2001 Internet Software Consortium. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM + * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL + * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING + * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, + * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION + * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#if !defined (HAVE_GETRRSETBYNAME) && defined (HAVE_LDNS) + +#include +#include + +#include + +#include "getrrsetbyname.h" +#include "log.h" +#include "xmalloc.h" + +#define malloc(x) (xmalloc(x)) +#define calloc(x, y) (xcalloc((x),(y))) + +int +getrrsetbyname(const char *hostname, unsigned int rdclass, + unsigned int rdtype, unsigned int flags, + struct rrsetinfo **res) +{ + int result; + unsigned int i, j, index_ans, index_sig; + struct rrsetinfo *rrset = NULL; + struct rdatainfo *rdata; + size_t len; + ldns_resolver *ldns_res = NULL; + ldns_rdf *domain = NULL; + ldns_pkt *pkt = NULL; + ldns_rr_list *rrsigs = NULL, *rrdata = NULL; + ldns_status err; + ldns_rr *rr; + + /* check for invalid class and type */ + if (rdclass > 0xffff || rdtype > 0xffff) { + result = ERRSET_INVAL; + goto fail; + } + + /* don't allow queries of class or type ANY */ + if (rdclass == 0xff || rdtype == 0xff) { + result = ERRSET_INVAL; + goto fail; + } + + /* don't allow flags yet, unimplemented */ + if (flags) { + result = ERRSET_INVAL; + goto fail; + } + + /* Initialize resolver from resolv.conf */ + domain = ldns_dname_new_frm_str(hostname); + if ((err = ldns_resolver_new_frm_file(&ldns_res, NULL)) != \ + LDNS_STATUS_OK) { + result = ERRSET_FAIL; + goto fail; + } + +#ifdef LDNS_DEBUG + ldns_resolver_set_debug(ldns_res, true); +#endif /* LDNS_DEBUG */ + + ldns_resolver_set_dnssec(ldns_res, true); /* Use DNSSEC */ + + /* make query */ + pkt = ldns_resolver_query(ldns_res, domain, rdtype, rdclass, LDNS_RD); + + /*** TODO: finer errcodes -- see original **/ + if (!pkt || ldns_pkt_ancount(pkt) < 1) { + result = ERRSET_FAIL; + goto fail; + } + + /* initialize rrset */ + rrset = calloc(1, sizeof(struct rrsetinfo)); + if (rrset == NULL) { + result = ERRSET_NOMEMORY; + goto fail; + } + + rrdata = ldns_pkt_rr_list_by_type(pkt, rdtype, LDNS_SECTION_ANSWER); + rrset->rri_nrdatas = ldns_rr_list_rr_count(rrdata); + if (!rrset->rri_nrdatas) { + result = ERRSET_NODATA; + goto fail; + } + + /* copy name from answer section */ + len = ldns_rdf_size(ldns_rr_owner(ldns_rr_list_rr(rrdata, 0))); + if ((rrset->rri_name = malloc(len)) == NULL) { + result = ERRSET_NOMEMORY; + goto fail; + } + memcpy(rrset->rri_name, + ldns_rdf_data(ldns_rr_owner(ldns_rr_list_rr(rrdata, 0))), len); + + rrset->rri_rdclass = ldns_rr_get_class(ldns_rr_list_rr(rrdata, 0)); + rrset->rri_rdtype = ldns_rr_get_type(ldns_rr_list_rr(rrdata, 0)); + rrset->rri_ttl = ldns_rr_ttl(ldns_rr_list_rr(rrdata, 0)); + + debug2("ldns: got %u answers from DNS", rrset->rri_nrdatas); + + /* Check for authenticated data */ + if (ldns_pkt_ad(pkt)) { + rrset->rri_flags |= RRSET_VALIDATED; + } else { /* AD is not set, try autonomous validation */ + ldns_rr_list * trusted_keys = ldns_rr_list_new(); + + debug2("ldns: trying to validate RRset"); + /* Get eventual sigs */ + rrsigs = ldns_pkt_rr_list_by_type(pkt, LDNS_RR_TYPE_RRSIG, + LDNS_SECTION_ANSWER); + + rrset->rri_nsigs = ldns_rr_list_rr_count(rrsigs); + debug2("ldns: got %u signature(s) (RRTYPE %u) from DNS", + rrset->rri_nsigs, LDNS_RR_TYPE_RRSIG); + + if ((err = ldns_verify_trusted(ldns_res, rrdata, rrsigs, + trusted_keys)) == LDNS_STATUS_OK) { + rrset->rri_flags |= RRSET_VALIDATED; + debug2("ldns: RRset is signed with a valid key"); + } else { + debug2("ldns: RRset validation failed: %s", + ldns_get_errorstr_by_id(err)); + } + + ldns_rr_list_deep_free(trusted_keys); + } + + /* allocate memory for answers */ + rrset->rri_rdatas = calloc(rrset->rri_nrdatas, + sizeof(struct rdatainfo)); + + if (rrset->rri_rdatas == NULL) { + result = ERRSET_NOMEMORY; + goto fail; + } + + /* allocate memory for signatures */ + if (rrset->rri_nsigs > 0) { + rrset->rri_sigs = calloc(rrset->rri_nsigs, + sizeof(struct rdatainfo)); + + if (rrset->rri_sigs == NULL) { + result = ERRSET_NOMEMORY; + goto fail; + } + } + + /* copy answers & signatures */ + for (i=0, index_ans=0, index_sig=0; i< pkt->_header->_ancount; i++) { + rdata = NULL; + rr = ldns_rr_list_rr(ldns_pkt_answer(pkt), i); + + if (ldns_rr_get_class(rr) == rrset->rri_rdclass && + ldns_rr_get_type(rr) == rrset->rri_rdtype) { + rdata = &rrset->rri_rdatas[index_ans++]; + } + + if (rr->_rr_class == rrset->rri_rdclass && + rr->_rr_type == LDNS_RR_TYPE_RRSIG && + rrset->rri_sigs) { + rdata = &rrset->rri_sigs[index_sig++]; + } + + if (rdata) { + size_t rdata_offset = 0; + + rdata->rdi_length = 0; + for (j=0; j< rr->_rd_count; j++) { + rdata->rdi_length += + ldns_rdf_size(ldns_rr_rdf(rr, j)); + } + + rdata->rdi_data = malloc(rdata->rdi_length); + if (rdata->rdi_data == NULL) { + result = ERRSET_NOMEMORY; + goto fail; + } + + /* Re-create the raw DNS RDATA */ + for (j=0; j< rr->_rd_count; j++) { + len = ldns_rdf_size(ldns_rr_rdf(rr, j)); + memcpy(rdata->rdi_data + rdata_offset, + ldns_rdf_data(ldns_rr_rdf(rr, j)), len); + rdata_offset += len; + } + } + } + + *res = rrset; + result = ERRSET_SUCCESS; + +fail: + /* freerrset(rrset); */ + ldns_rdf_deep_free(domain); + ldns_pkt_free(pkt); + ldns_rr_list_deep_free(rrsigs); + ldns_rr_list_deep_free(rrdata); + ldns_resolver_deep_free(ldns_res); + + return result; +} + + +void +freerrset(struct rrsetinfo *rrset) +{ + u_int16_t i; + + if (rrset == NULL) + return; + + if (rrset->rri_rdatas) { + for (i = 0; i < rrset->rri_nrdatas; i++) { + if (rrset->rri_rdatas[i].rdi_data == NULL) + break; + free(rrset->rri_rdatas[i].rdi_data); + } + free(rrset->rri_rdatas); + } + + if (rrset->rri_sigs) { + for (i = 0; i < rrset->rri_nsigs; i++) { + if (rrset->rri_sigs[i].rdi_data == NULL) + break; + free(rrset->rri_sigs[i].rdi_data); + } + free(rrset->rri_sigs); + } + + if (rrset->rri_name) + free(rrset->rri_name); + free(rrset); +} + + +#endif /* !defined (HAVE_GETRRSETBYNAME) && defined (HAVE_LDNS) */ diff --git a/openbsd-compat/getrrsetbyname.c b/openbsd-compat/getrrsetbyname.c index 66080ee..0e0b753 100644 --- a/openbsd-compat/getrrsetbyname.c +++ b/openbsd-compat/getrrsetbyname.c @@ -49,7 +49,7 @@ #ifndef WIN32_FIXME -#ifndef HAVE_GETRRSETBYNAME +#if !defined (HAVE_GETRRSETBYNAME) && !defined (HAVE_LDNS) #include #include @@ -609,6 +609,6 @@ count_dns_rr(struct dns_rr *p, u_int16_t class, u_int16_t type) return (n); } -#endif /* !defined(HAVE_GETRRSETBYNAME) */ +#endif /* !defined (HAVE_GETRRSETBYNAME) && !defined (HAVE_LDNS) */ #endif /* !WIN32_FIXME */ diff --git a/openbsd-compat/glob.c b/openbsd-compat/glob.c index d23ebd9..de44737 100644 --- a/openbsd-compat/glob.c +++ b/openbsd-compat/glob.c @@ -1,4 +1,4 @@ -/* $OpenBSD: glob.c,v 1.35 2011/01/12 01:53:14 djm Exp $ */ +/* $OpenBSD: glob.c,v 1.38 2011/09/22 06:27:29 djm Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. @@ -68,6 +68,7 @@ #include #include #include +#include #include #include #include @@ -134,13 +135,22 @@ typedef char Char; #define GLOB_LIMIT_STAT 128 #define GLOB_LIMIT_READDIR 16384 +/* Limit of recursion during matching attempts. */ +#define GLOB_LIMIT_RECUR 64 + struct glob_lim { size_t glim_malloc; size_t glim_stat; size_t glim_readdir; }; +struct glob_path_stat { + char *gps_path; + struct stat *gps_stat; +}; + static int compare(const void *, const void *); +static int compare_gps(const void *, const void *); static int g_Ctoc(const Char *, char *, u_int); static int g_lstat(Char *, struct stat *, glob_t *); static DIR *g_opendir(Char *, glob_t *); @@ -160,7 +170,7 @@ static const Char * static int globexp1(const Char *, glob_t *, struct glob_lim *); static int globexp2(const Char *, const Char *, glob_t *, struct glob_lim *); -static int match(Char *, Char *, Char *); +static int match(Char *, Char *, Char *, int); #ifdef DEBUG static void qprintf(const char *, Char *); #endif @@ -174,6 +184,9 @@ glob(const char *pattern, int flags, int (*errfunc)(const char *, int), Char *bufnext, *bufend, patbuf[MAXPATHLEN]; struct glob_lim limit = { 0, 0, 0 }; + if (strnlen(pattern, PATH_MAX) == PATH_MAX) + return(GLOB_NOMATCH); + patnext = (u_char *) pattern; if (!(flags & GLOB_APPEND)) { pglob->gl_pathc = 0; @@ -550,9 +563,32 @@ glob0(const Char *pattern, glob_t *pglob, struct glob_lim *limitp) else return(GLOB_NOMATCH); } - if (!(pglob->gl_flags & GLOB_NOSORT)) - qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, - pglob->gl_pathc - oldpathc, sizeof(char *), compare); + if (!(pglob->gl_flags & GLOB_NOSORT)) { + if ((pglob->gl_flags & GLOB_KEEPSTAT)) { + /* Keep the paths and stat info synced during sort */ + struct glob_path_stat *path_stat; + int i; + int n = pglob->gl_pathc - oldpathc; + int o = pglob->gl_offs + oldpathc; + + if ((path_stat = calloc(n, sizeof(*path_stat))) == NULL) + return GLOB_NOSPACE; + for (i = 0; i < n; i++) { + path_stat[i].gps_path = pglob->gl_pathv[o + i]; + path_stat[i].gps_stat = pglob->gl_statv[o + i]; + } + qsort(path_stat, n, sizeof(*path_stat), compare_gps); + for (i = 0; i < n; i++) { + pglob->gl_pathv[o + i] = path_stat[i].gps_path; + pglob->gl_statv[o + i] = path_stat[i].gps_stat; + } + free(path_stat); + } else { + qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc, + pglob->gl_pathc - oldpathc, sizeof(char *), + compare); + } + } return(0); } @@ -562,6 +598,15 @@ compare(const void *p, const void *q) return(strcmp(*(char **)p, *(char **)q)); } +static int +compare_gps(const void *_p, const void *_q) +{ + const struct glob_path_stat *p = (const struct glob_path_stat *)_p; + const struct glob_path_stat *q = (const struct glob_path_stat *)_q; + + return(strcmp(p->gps_path, q->gps_path)); +} + static int glob1(Char *pattern, Char *pattern_last, glob_t *pglob, struct glob_lim *limitp) { @@ -699,7 +744,8 @@ glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, errno = 0; *pathend++ = SEP; *pathend = EOS; - return(GLOB_NOSPACE); + err = GLOB_NOSPACE; + break; } /* Initial DOT must be matched literally. */ @@ -715,7 +761,7 @@ glob3(Char *pathbuf, Char *pathbuf_last, Char *pathend, Char *pathend_last, break; } - if (!match(pathend, pattern, restpattern)) { + if (!match(pathend, pattern, restpattern, GLOB_LIMIT_RECUR)) { *pathend = EOS; continue; } @@ -852,19 +898,24 @@ globextend(const Char *path, glob_t *pglob, struct glob_lim *limitp, * pattern causes a recursion level. */ static int -match(Char *name, Char *pat, Char *patend) +match(Char *name, Char *pat, Char *patend, int recur) { int ok, negate_range; Char c, k; + if (recur-- == 0) + return(GLOB_NOSPACE); + while (pat < patend) { c = *pat++; switch (c & M_MASK) { case M_ALL: + while (pat < patend && (*pat & M_MASK) == M_ALL) + pat++; /* eat consecutive '*' */ if (pat == patend) return(1); do { - if (match(name, pat, patend)) + if (match(name, pat, patend, recur)) return(1); } while (*name++ != EOS); return(0); @@ -1014,5 +1065,5 @@ qprintf(const char *str, Char *s) #endif /* !defined(HAVE_GLOB) || !defined(GLOB_HAS_ALTDIRFUNC) || !defined(GLOB_HAS_GL_MATCHC) || !defined(GLOB_HAS_GL_STATV) */ - + #endif /* WIN32_FIXME */ diff --git a/openbsd-compat/glob.h b/openbsd-compat/glob.h index d97bf9a..54a581f 100644 --- a/openbsd-compat/glob.h +++ b/openbsd-compat/glob.h @@ -42,6 +42,7 @@ #undef HAVE_GLOB_H #endif + #if !defined(HAVE_GLOB_H) || !defined(GLOB_HAS_ALTDIRFUNC) || \ !defined(GLOB_HAS_GL_MATCHC) || !defined(GLOB_HAS_GL_STATV) || \ !defined(HAVE_DECL_GLOB_NOMATCH) || HAVE_DECL_GLOB_NOMATCH == 0 || \ diff --git a/openbsd-compat/inet_ntop.c b/openbsd-compat/inet_ntop.c index e7ca4b7..3259037 100644 --- a/openbsd-compat/inet_ntop.c +++ b/openbsd-compat/inet_ntop.c @@ -1,4 +1,4 @@ -/* $OpenBSD: inet_ntop.c,v 1.7 2005/08/06 20:30:03 espie Exp $ */ +/* $OpenBSD: inet_ntop.c,v 1.8 2008/12/09 19:38:38 otto Exp $ */ /* Copyright (c) 1996 by Internet Software Consortium. * @@ -57,13 +57,13 @@ static const char *inet_ntop6(const u_char *src, char *dst, size_t size); * Paul Vixie, 1996. */ const char * -inet_ntop(int af, const void *src, char *dst, size_t size) +inet_ntop(int af, const void *src, char *dst, socklen_t size) { switch (af) { case AF_INET: - return (inet_ntop4(src, dst, size)); + return (inet_ntop4(src, dst, (size_t)size)); case AF_INET6: - return (inet_ntop6(src, dst, size)); + return (inet_ntop6(src, dst, (size_t)size)); default: errno = EAFNOSUPPORT; return (NULL); diff --git a/openbsd-compat/kludge-fd_set.c b/openbsd-compat/kludge-fd_set.c new file mode 100644 index 0000000..6c2ffb6 --- /dev/null +++ b/openbsd-compat/kludge-fd_set.c @@ -0,0 +1,28 @@ +/* Placed in the public domain. */ + +/* + * _FORTIFY_SOURCE includes a misguided check for FD_SET(n)/FD_ISSET(b) + * where n > FD_SETSIZE. This breaks OpenSSH and other programs that + * explicitly allocate fd_sets. To avoid this, we wrap FD_SET in a + * function compiled without _FORTIFY_SOURCE. + */ + +#include "config.h" + +#if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE) +# include +# if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ) +# if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) +# undef _FORTIFY_SOURCE +# undef __USE_FORTIFY_LEVEL +# include +void kludge_FD_SET(int n, fd_set *set) { + FD_SET(n, set); +} +int kludge_FD_ISSET(int n, fd_set *set) { + return FD_ISSET(n, set); +} +# endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */ +# endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */ +#endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */ + diff --git a/openbsd-compat/md5.c b/openbsd-compat/md5.c new file mode 100644 index 0000000..195ab51 --- /dev/null +++ b/openbsd-compat/md5.c @@ -0,0 +1,251 @@ +/* $OpenBSD: md5.c,v 1.9 2014/01/08 06:14:57 tedu Exp $ */ + +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +#include "includes.h" + +#ifndef WITH_OPENSSL + +#include +#include +#include "md5.h" + +#define PUT_64BIT_LE(cp, value) do { \ + (cp)[7] = (value) >> 56; \ + (cp)[6] = (value) >> 48; \ + (cp)[5] = (value) >> 40; \ + (cp)[4] = (value) >> 32; \ + (cp)[3] = (value) >> 24; \ + (cp)[2] = (value) >> 16; \ + (cp)[1] = (value) >> 8; \ + (cp)[0] = (value); } while (0) + +#define PUT_32BIT_LE(cp, value) do { \ + (cp)[3] = (value) >> 24; \ + (cp)[2] = (value) >> 16; \ + (cp)[1] = (value) >> 8; \ + (cp)[0] = (value); } while (0) + +static u_int8_t PADDING[MD5_BLOCK_LENGTH] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void +MD5Init(MD5_CTX *ctx) +{ + ctx->count = 0; + ctx->state[0] = 0x67452301; + ctx->state[1] = 0xefcdab89; + ctx->state[2] = 0x98badcfe; + ctx->state[3] = 0x10325476; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +void +MD5Update(MD5_CTX *ctx, const unsigned char *input, size_t len) +{ + size_t have, need; + + /* Check how many bytes we already have and how many more we need. */ + have = (size_t)((ctx->count >> 3) & (MD5_BLOCK_LENGTH - 1)); + need = MD5_BLOCK_LENGTH - have; + + /* Update bitcount */ + ctx->count += (u_int64_t)len << 3; + + if (len >= need) { + if (have != 0) { + memcpy(ctx->buffer + have, input, need); + MD5Transform(ctx->state, ctx->buffer); + input += need; + len -= need; + have = 0; + } + + /* Process data in MD5_BLOCK_LENGTH-byte chunks. */ + while (len >= MD5_BLOCK_LENGTH) { + MD5Transform(ctx->state, input); + input += MD5_BLOCK_LENGTH; + len -= MD5_BLOCK_LENGTH; + } + } + + /* Handle any remaining bytes of data. */ + if (len != 0) + memcpy(ctx->buffer + have, input, len); +} + +/* + * Pad pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +void +MD5Pad(MD5_CTX *ctx) +{ + u_int8_t count[8]; + size_t padlen; + + /* Convert count to 8 bytes in little endian order. */ + PUT_64BIT_LE(count, ctx->count); + + /* Pad out to 56 mod 64. */ + padlen = MD5_BLOCK_LENGTH - + ((ctx->count >> 3) & (MD5_BLOCK_LENGTH - 1)); + if (padlen < 1 + 8) + padlen += MD5_BLOCK_LENGTH; + MD5Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */ + MD5Update(ctx, count, 8); +} + +/* + * Final wrapup--call MD5Pad, fill in digest and zero out ctx. + */ +void +MD5Final(unsigned char digest[MD5_DIGEST_LENGTH], MD5_CTX *ctx) +{ + int i; + + MD5Pad(ctx); + for (i = 0; i < 4; i++) + PUT_32BIT_LE(digest + i * 4, ctx->state[i]); + memset(ctx, 0, sizeof(*ctx)); +} + + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +void +MD5Transform(u_int32_t state[4], const u_int8_t block[MD5_BLOCK_LENGTH]) +{ + u_int32_t a, b, c, d, in[MD5_BLOCK_LENGTH / 4]; + +#if BYTE_ORDER == LITTLE_ENDIAN + memcpy(in, block, sizeof(in)); +#else + for (a = 0; a < MD5_BLOCK_LENGTH / 4; a++) { + in[a] = (u_int32_t)( + (u_int32_t)(block[a * 4 + 0]) | + (u_int32_t)(block[a * 4 + 1]) << 8 | + (u_int32_t)(block[a * 4 + 2]) << 16 | + (u_int32_t)(block[a * 4 + 3]) << 24); + } +#endif + + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + + MD5STEP(F1, a, b, c, d, in[ 0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[ 1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[ 2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[ 3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[ 4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[ 5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[ 6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[ 7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[ 8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[ 9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[ 1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[ 6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[ 0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[ 5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[ 4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[ 9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[ 3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[ 8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[ 2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[ 7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[ 5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[ 8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[ 1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[ 4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[ 7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[ 0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[ 3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[ 6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[ 9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2 ] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[ 0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7 ] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5 ] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3 ] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1 ] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8 ] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6 ] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4 ] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2 ] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9 ] + 0xeb86d391, 21); + + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; +} +#endif /* !WITH_OPENSSL */ diff --git a/openbsd-compat/md5.h b/openbsd-compat/md5.h new file mode 100644 index 0000000..c83c19d --- /dev/null +++ b/openbsd-compat/md5.h @@ -0,0 +1,51 @@ +/* $OpenBSD: md5.h,v 1.17 2012/12/05 23:19:57 deraadt Exp $ */ + +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + */ + +#ifndef _MD5_H_ +#define _MD5_H_ + +#ifndef WITH_OPENSSL + +#define MD5_BLOCK_LENGTH 64 +#define MD5_DIGEST_LENGTH 16 +#define MD5_DIGEST_STRING_LENGTH (MD5_DIGEST_LENGTH * 2 + 1) + +typedef struct MD5Context { + u_int32_t state[4]; /* state */ + u_int64_t count; /* number of bits, mod 2^64 */ + u_int8_t buffer[MD5_BLOCK_LENGTH]; /* input buffer */ +} MD5_CTX; + +void MD5Init(MD5_CTX *); +void MD5Update(MD5_CTX *, const u_int8_t *, size_t) + __attribute__((__bounded__(__string__,2,3))); +void MD5Pad(MD5_CTX *); +void MD5Final(u_int8_t [MD5_DIGEST_LENGTH], MD5_CTX *) + __attribute__((__bounded__(__minbytes__,1,MD5_DIGEST_LENGTH))); +void MD5Transform(u_int32_t [4], const u_int8_t [MD5_BLOCK_LENGTH]) + __attribute__((__bounded__(__minbytes__,1,4))) + __attribute__((__bounded__(__minbytes__,2,MD5_BLOCK_LENGTH))); +char *MD5End(MD5_CTX *, char *) + __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH))); +char *MD5File(const char *, char *) + __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH))); +char *MD5FileChunk(const char *, char *, off_t, off_t) + __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH))); +char *MD5Data(const u_int8_t *, size_t, char *) + __attribute__((__bounded__(__string__,1,2))) + __attribute__((__bounded__(__minbytes__,3,MD5_DIGEST_STRING_LENGTH))); + +#endif /* !WITH_OPENSSL */ + +#endif /* _MD5_H_ */ diff --git a/openbsd-compat/mktemp.c b/openbsd-compat/mktemp.c index 2285c84..4eb52f4 100644 --- a/openbsd-compat/mktemp.c +++ b/openbsd-compat/mktemp.c @@ -1,34 +1,22 @@ /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ /* Changes: Removed mktemp */ -/* $OpenBSD: mktemp.c,v 1.19 2005/08/08 08:05:36 espie Exp $ */ +/* $OpenBSD: mktemp.c,v 1.30 2010/03/21 23:09:30 schwarze Exp $ */ /* - * Copyright (c) 1987, 1993 - * The Regents of the University of California. All rights reserved. + * Copyright (c) 1996-1998, 2008 Theo de Raadt + * Copyright (c) 1997, 2008-2009 Todd C. Miller * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */ @@ -37,142 +25,117 @@ #include #include - -#include -#include #include +#include +#include +#include +#include +#include +#include #include #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) -static int _gettemp(char *, int *, int, int); +#define MKTEMP_NAME 0 +#define MKTEMP_FILE 1 +#define MKTEMP_DIR 2 -int -mkstemps(char *path, int slen) +#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" +#define NUM_CHARS (sizeof(TEMPCHARS) - 1) + +static int +mktemp_internal(char *path, int slen, int mode) { + char *start, *cp, *ep; + const char *tempchars = TEMPCHARS; + unsigned int r, tries; + struct stat sb; + size_t len; int fd; - return (_gettemp(path, &fd, 0, slen) ? fd : -1); + len = strlen(path); + if (len == 0 || slen < 0 || (size_t)slen >= len) { + errno = EINVAL; + return(-1); + } + ep = path + len - slen; + + tries = 1; + for (start = ep; start > path && start[-1] == 'X'; start--) { + if (tries < INT_MAX / NUM_CHARS) + tries *= NUM_CHARS; + } + tries *= 2; + + do { + for (cp = start; cp != ep; cp++) { + r = arc4random_uniform(NUM_CHARS); + *cp = tempchars[r]; + } + + switch (mode) { + case MKTEMP_NAME: + if (lstat(path, &sb) != 0) + return(errno == ENOENT ? 0 : -1); + break; + case MKTEMP_FILE: + fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR); + if (fd != -1 || errno != EEXIST) + return(fd); + break; + case MKTEMP_DIR: + if (mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR) == 0) + return(0); + if (errno != EEXIST) + return(-1); + break; + } + } while (--tries); + + errno = EEXIST; + return(-1); } +#if 0 +char *_mktemp(char *); + +char * +_mktemp(char *path) +{ + if (mktemp_internal(path, 0, MKTEMP_NAME) == -1) + return(NULL); + return(path); +} + +__warn_references(mktemp, + "warning: mktemp() possibly used unsafely; consider using mkstemp()"); + +char * +mktemp(char *path) +{ + return(_mktemp(path)); +} +#endif + int mkstemp(char *path) { - int fd; + return(mktemp_internal(path, 0, MKTEMP_FILE)); +} - return (_gettemp(path, &fd, 0, 0) ? fd : -1); +int +mkstemps(char *path, int slen) +{ + return(mktemp_internal(path, slen, MKTEMP_FILE)); } char * mkdtemp(char *path) { - return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); -} + int error; -static int -_gettemp(path, doopen, domkdir, slen) - char *path; - register int *doopen; - int domkdir; - int slen; -{ - register char *start, *trv, *suffp; - struct stat sbuf; - int rval; - pid_t pid; - - if (doopen && domkdir) { - errno = EINVAL; - return(0); - } - - for (trv = path; *trv; ++trv) - ; - trv -= slen; - suffp = trv; - --trv; - if (trv < path) { - errno = EINVAL; - return (0); - } - pid = getpid(); - while (trv >= path && *trv == 'X' && pid != 0) { - *trv-- = (pid % 10) + '0'; - pid /= 10; - } - while (trv >= path && *trv == 'X') { - char c; - - pid = (arc4random() & 0xffff) % (26+26); - if (pid < 26) - c = pid + 'A'; - else - c = (pid - 26) + 'a'; - *trv-- = c; - } - start = trv + 1; - - /* - * check the target directory; if you have six X's and it - * doesn't exist this runs for a *very* long time. - */ - if (doopen || domkdir) { - for (;; --trv) { - if (trv <= path) - break; - if (*trv == '/') { - *trv = '\0'; - rval = stat(path, &sbuf); - *trv = '/'; - if (rval != 0) - return(0); - if (!S_ISDIR(sbuf.st_mode)) { - errno = ENOTDIR; - return(0); - } - break; - } - } - } - - for (;;) { - if (doopen) { - if ((*doopen = - open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) - return(1); - if (errno != EEXIST) - return(0); - } else if (domkdir) { - if (mkdir(path, 0700) == 0) - return(1); - if (errno != EEXIST) - return(0); - } else if (lstat(path, &sbuf)) - return(errno == ENOENT ? 1 : 0); - - /* tricky little algorithm for backward compatibility */ - for (trv = start;;) { - if (!*trv) - return (0); - if (*trv == 'Z') { - if (trv == suffp) - return (0); - *trv++ = 'a'; - } else { - if (isdigit(*trv)) - *trv = 'a'; - else if (*trv == 'z') /* inc from z to A */ - *trv = 'A'; - else { - if (trv == suffp) - return (0); - ++*trv; - } - break; - } - } - } - /*NOTREACHED*/ + error = mktemp_internal(path, 0, MKTEMP_DIR); + return(error ? NULL : path); } #endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ diff --git a/openbsd-compat/openbsd-compat.h b/openbsd-compat/openbsd-compat.h index 77c5ed2..b9e76a2 100644 --- a/openbsd-compat/openbsd-compat.h +++ b/openbsd-compat/openbsd-compat.h @@ -43,7 +43,11 @@ #include "readpassphrase.h" #include "vis.h" #include "getrrsetbyname.h" +#include "sha1.h" #include "sha2.h" +#include "rmd160.h" +#include "md5.h" +#include "blf.h" #ifndef HAVE_BASENAME char *basename(const char *path); @@ -61,9 +65,21 @@ void closefrom(int); char *getcwd(char *pt, size_t size); #endif +#ifndef HAVE_REALLOCARRAY +void *reallocarray(void *, size_t, size_t); +#endif + #if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH) +/* + * glibc's FORTIFY_SOURCE can redefine this and prevent us picking up the + * compat version. + */ +# ifdef BROKEN_REALPATH +# define realpath(x, y) _ssh_compat_realpath(x, y) +# endif + char *realpath(const char *path, char *resolved); -#endif +#endif #ifndef HAVE_RRESVPORT_AF int rresvport_af(int *alport, sa_family_t af); @@ -111,12 +127,16 @@ char *dirname(const char *path); int fmt_scaled(long long number, char *result); #endif +#ifndef HAVE_SCAN_SCALED +int scan_scaled(char *, long long *); +#endif + #if defined(BROKEN_INET_NTOA) || !defined(HAVE_INET_NTOA) char *inet_ntoa(struct in_addr in); #endif #ifndef HAVE_INET_NTOP -const char *inet_ntop(int af, const void *src, char *dst, size_t size); +const char *inet_ntop(int af, const void *src, char *dst, socklen_t size); #endif #ifndef HAVE_INET_ATON @@ -139,6 +159,7 @@ int getgrouplist(const char *, gid_t, gid_t *, int *); #if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET) int BSDgetopt(int argc, char * const *argv, const char *opts); +#include "openbsd-compat/getopt.h" #endif #if defined(HAVE_DECL_WRITEV) && HAVE_DECL_WRITEV == 0 @@ -149,15 +170,20 @@ int writev(int, struct iovec *, int); /* Home grown routines */ #include "bsd-misc.h" +#include "bsd-setres_id.h" #include "bsd-statvfs.h" #include "bsd-waitpid.h" #include "bsd-poll.h" #ifndef HAVE_GETPEEREID int getpeereid(int , uid_t *, gid_t *); -#endif +#endif -#ifndef HAVE_ARC4RANDOM +#ifdef HAVE_ARC4RANDOM +# ifndef HAVE_ARC4RANDOM_STIR +# define arc4random_stir() +# endif +#else unsigned int arc4random(void); void arc4random_stir(void); #endif /* !HAVE_ARC4RANDOM */ @@ -189,10 +215,25 @@ int snprintf(char *, size_t, SNPRINTF_CONST char *, ...); long long strtoll(const char *, char **, int); #endif +#ifndef HAVE_STRTOUL +unsigned long strtoul(const char *, char **, int); +#endif + +#ifndef HAVE_STRTOULL +unsigned long long strtoull(const char *, char **, int); +#endif + #ifndef HAVE_STRTONUM long long strtonum(const char *, long long, long long, const char **); #endif +#ifndef WIN32_FIXME +/* multibyte character support */ +#ifndef HAVE_MBLEN +# define mblen(x, y) (1) +#endif +#endif + #if !defined(HAVE_VASPRINTF) || !defined(HAVE_VSNPRINTF) # include #endif @@ -217,6 +258,15 @@ char *group_from_gid(gid_t, int); int timingsafe_bcmp(const void *, const void *, size_t); #endif +#ifndef HAVE_BCRYPT_PBKDF +int bcrypt_pbkdf(const char *, size_t, const u_int8_t *, size_t, + u_int8_t *, size_t, unsigned int); +#endif + +#ifndef HAVE_EXPLICIT_BZERO +void explicit_bzero(void *p, size_t n); +#endif + void *xmmap(size_t size); char *xcrypt(const char *password, const char *salt); char *shadow_pw(struct passwd *pw); @@ -235,4 +285,20 @@ char *shadow_pw(struct passwd *pw); #include "port-tun.h" #include "port-uw.h" +/* _FORTIFY_SOURCE breaks FD_ISSET(n)/FD_SET(n) for n > FD_SETSIZE. Avoid. */ +#if defined(HAVE_FEATURES_H) && defined(_FORTIFY_SOURCE) +# include +# if defined(__GNU_LIBRARY__) && defined(__GLIBC_PREREQ) +# if __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) +# include /* Ensure include guard is defined */ +# undef FD_SET +# undef FD_ISSET +# define FD_SET(n, set) kludge_FD_SET(n, set) +# define FD_ISSET(n, set) kludge_FD_ISSET(n, set) +void kludge_FD_SET(int, fd_set *); +int kludge_FD_ISSET(int, fd_set *); +# endif /* __GLIBC_PREREQ(2, 15) && (_FORTIFY_SOURCE > 0) */ +# endif /* __GNU_LIBRARY__ && __GLIBC_PREREQ */ +#endif /* HAVE_FEATURES_H && _FORTIFY_SOURCE */ + #endif /* _OPENBSD_COMPAT_H */ diff --git a/openbsd-compat/openssl-compat.c b/openbsd-compat/openssl-compat.c index 5189cab..63a660c 100644 --- a/openbsd-compat/openssl-compat.c +++ b/openbsd-compat/openssl-compat.c @@ -1,4 +1,4 @@ -/* $Id: openssl-compat.c,v 1.14 2011/05/10 01:13:38 dtucker Exp $ */ +/* $Id: openssl-compat.c,v 1.19 2014/07/02 05:28:07 djm Exp $ */ /* * Copyright (c) 2005 Darren Tucker @@ -16,8 +16,11 @@ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS #include "includes.h" +#ifdef WITH_OPENSSL + #include #include @@ -26,112 +29,45 @@ # include #endif -#ifndef HAVE_RSA_GET_DEFAULT_METHOD -# include -#endif - #include "log.h" -#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS #include "openssl-compat.h" -#ifdef SSH_OLD_EVP -int -ssh_EVP_CipherInit(EVP_CIPHER_CTX *evp, const EVP_CIPHER *type, - unsigned char *key, unsigned char *iv, int enc) -{ - EVP_CipherInit(evp, type, key, iv, enc); - return 1; -} +/* + * OpenSSL version numbers: MNNFFPPS: major minor fix patch status + * We match major, minor, fix and status (not patch) for <1.0.0. + * After that, we acceptable compatible fix versions (so we + * allow 1.0.1 to work with 1.0.0). Going backwards is only allowed + * within a patch series. + */ int -ssh_EVP_Cipher(EVP_CIPHER_CTX *evp, char *dst, char *src, int len) +ssh_compatible_openssl(long headerver, long libver) { - EVP_Cipher(evp, dst, src, len); - return 1; + long mask, hfix, lfix; + + /* exact match is always OK */ + if (headerver == libver) + return 1; + + /* for versions < 1.0.0, major,minor,fix,status must match */ + if (headerver < 0x1000000f) { + mask = 0xfffff00fL; /* major,minor,fix,status */ + return (headerver & mask) == (libver & mask); + } + + /* + * For versions >= 1.0.0, major,minor,status must match and library + * fix version must be equal to or newer than the header. + */ + mask = 0xfff0000fL; /* major,minor,status */ + hfix = (headerver & 0x000ff000) >> 12; + lfix = (libver & 0x000ff000) >> 12; + if ( (headerver & mask) == (libver & mask) && lfix >= hfix) + return 1; + return 0; } -int -ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *evp) -{ - EVP_CIPHER_CTX_cleanup(evp); - return 1; -} -#endif - -#ifdef OPENSSL_EVP_DIGESTUPDATE_VOID -int -ssh_EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d, unsigned int cnt) -{ - EVP_DigestUpdate(ctx, d, cnt); - return 1; -} -#endif - -#ifndef HAVE_BN_IS_PRIME_EX -int -BN_is_prime_ex(const BIGNUM *p, int nchecks, BN_CTX *ctx, void *cb) -{ - if (cb != NULL) - fatal("%s: callback args not supported", __func__); - return BN_is_prime(p, nchecks, NULL, ctx, NULL); -} -#endif - -#ifndef HAVE_RSA_GENERATE_KEY_EX -int -RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *bn_e, void *cb) -{ - RSA *new_rsa, tmp_rsa; - unsigned long e; - - if (cb != NULL) - fatal("%s: callback args not supported", __func__); - e = BN_get_word(bn_e); - if (e == 0xffffffffL) - fatal("%s: value of e too large", __func__); - new_rsa = RSA_generate_key(bits, e, NULL, NULL); - if (new_rsa == NULL) - return 0; - /* swap rsa/new_rsa then free new_rsa */ - tmp_rsa = *rsa; - *rsa = *new_rsa; - *new_rsa = tmp_rsa; - RSA_free(new_rsa); - return 1; -} -#endif - -#ifndef HAVE_DSA_GENERATE_PARAMETERS_EX -int -DSA_generate_parameters_ex(DSA *dsa, int bits, const unsigned char *seed, - int seed_len, int *counter_ret, unsigned long *h_ret, void *cb) -{ - DSA *new_dsa, tmp_dsa; - - if (cb != NULL) - fatal("%s: callback args not supported", __func__); - new_dsa = DSA_generate_parameters(bits, (unsigned char *)seed, seed_len, - counter_ret, h_ret, NULL, NULL); - if (new_dsa == NULL) - return 0; - /* swap dsa/new_dsa then free new_dsa */ - tmp_dsa = *dsa; - *dsa = *new_dsa; - *new_dsa = tmp_dsa; - DSA_free(new_dsa); - return 1; -} -#endif - -#ifndef HAVE_RSA_GET_DEFAULT_METHOD -RSA_METHOD * -RSA_get_default_method(void) -{ - return RSA_PKCS1_SSLeay(); -} -#endif - #ifdef USE_OPENSSL_ENGINE void ssh_OpenSSL_add_all_algorithms(void) @@ -144,3 +80,5 @@ ssh_OpenSSL_add_all_algorithms(void) OPENSSL_config(NULL); } #endif + +#endif /* WITH_OPENSSL */ diff --git a/openbsd-compat/openssl-compat.h b/openbsd-compat/openssl-compat.h index c5fc24e..8917551 100644 --- a/openbsd-compat/openssl-compat.h +++ b/openbsd-compat/openssl-compat.h @@ -1,4 +1,4 @@ -/* $Id: openssl-compat.h,v 1.19 2011/05/10 01:13:38 dtucker Exp $ */ +/* $Id: openssl-compat.h,v 1.31 2014/08/29 18:18:29 djm Exp $ */ /* * Copyright (c) 2005 Darren Tucker @@ -16,75 +16,64 @@ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#ifndef _OPENSSL_COMPAT_H +#define _OPENSSL_COMPAT_H + #include "includes.h" +#ifdef WITH_OPENSSL + #include #include #include #include -/* Only in 0.9.8 */ -#ifndef OPENSSL_DSA_MAX_MODULUS_BITS -# define OPENSSL_DSA_MAX_MODULUS_BITS 10000 -#endif -#ifndef OPENSSL_RSA_MAX_MODULUS_BITS -# define OPENSSL_RSA_MAX_MODULUS_BITS 16384 +int ssh_compatible_openssl(long, long); + +#if (OPENSSL_VERSION_NUMBER <= 0x0090805fL) +# error OpenSSL 0.9.8f or greater is required #endif -/* OPENSSL_free() is Free() in versions before OpenSSL 0.9.6 */ -#if !defined(OPENSSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x0090600f) -# define OPENSSL_free(x) Free(x) -#endif - -#if OPENSSL_VERSION_NUMBER < 0x00906000L -# define SSH_OLD_EVP -# define EVP_CIPHER_CTX_get_app_data(e) ((e)->app_data) -#endif - -#if OPENSSL_VERSION_NUMBER < 0x1000000fL +#if OPENSSL_VERSION_NUMBER < 0x10000001L # define LIBCRYPTO_EVP_INL_TYPE unsigned int #else # define LIBCRYPTO_EVP_INL_TYPE size_t #endif -#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES) -# define USE_BUILTIN_RIJNDAEL +#ifndef OPENSSL_RSA_MAX_MODULUS_BITS +# define OPENSSL_RSA_MAX_MODULUS_BITS 16384 +#endif +#ifndef OPENSSL_DSA_MAX_MODULUS_BITS +# define OPENSSL_DSA_MAX_MODULUS_BITS 10000 #endif -#ifdef USE_BUILTIN_RIJNDAEL -# include "rijndael.h" -# define AES_KEY rijndael_ctx -# define AES_BLOCK_SIZE 16 -# define AES_encrypt(a, b, c) rijndael_encrypt(c, a, b) -# define AES_set_encrypt_key(a, b, c) rijndael_set_key(c, (char *)a, b, 1) -# define EVP_aes_128_cbc evp_rijndael -# define EVP_aes_192_cbc evp_rijndael -# define EVP_aes_256_cbc evp_rijndael -extern const EVP_CIPHER *evp_rijndael(void); -extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); +#ifndef OPENSSL_HAVE_EVPCTR +# define EVP_aes_128_ctr evp_aes_128_ctr +# define EVP_aes_192_ctr evp_aes_128_ctr +# define EVP_aes_256_ctr evp_aes_128_ctr +const EVP_CIPHER *evp_aes_128_ctr(void); +void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t); #endif -#if !defined(EVP_CTRL_SET_ACSS_MODE) -# if (OPENSSL_VERSION_NUMBER >= 0x00907000L) -# define USE_CIPHER_ACSS 1 -extern const EVP_CIPHER *evp_acss(void); -# define EVP_acss evp_acss +/* Avoid some #ifdef. Code that uses these is unreachable without GCM */ +#if !defined(OPENSSL_HAVE_EVPGCM) && !defined(EVP_CTRL_GCM_SET_IV_FIXED) +# define EVP_CTRL_GCM_SET_IV_FIXED -1 +# define EVP_CTRL_GCM_IV_GEN -1 +# define EVP_CTRL_GCM_SET_TAG -1 +# define EVP_CTRL_GCM_GET_TAG -1 +#endif + +/* Replace missing EVP_CIPHER_CTX_ctrl() with something that returns failure */ +#ifndef HAVE_EVP_CIPHER_CTX_CTRL +# ifdef OPENSSL_HAVE_EVPGCM +# error AES-GCM enabled without EVP_CIPHER_CTX_ctrl /* shouldn't happen */ # else -# define EVP_acss NULL +# define EVP_CIPHER_CTX_ctrl(a,b,c,d) (0) # endif #endif -/* OpenSSL 0.9.8e returns cipher key len not context key len */ -#if (OPENSSL_VERSION_NUMBER == 0x0090805fL) -# define EVP_CIPHER_CTX_key_length(c) ((c)->key_len) -#endif - -#ifndef HAVE_RSA_GET_DEFAULT_METHOD -RSA_METHOD *RSA_get_default_method(void); -#endif - /* * We overload some of the OpenSSL crypto functions with ssh_* equivalents - * which cater for older and/or less featureful OpenSSL version. + * to automatically handle OpenSSL engine initialisation. * * In order for the compat library to call the real functions, it must * define SSH_DONT_OVERLOAD_OPENSSL_FUNCS before including this file and @@ -92,19 +81,6 @@ RSA_METHOD *RSA_get_default_method(void); */ #ifndef SSH_DONT_OVERLOAD_OPENSSL_FUNCS -# ifdef SSH_OLD_EVP -# ifdef EVP_Cipher -# undef EVP_Cipher -# endif -# define EVP_CipherInit(a,b,c,d,e) ssh_EVP_CipherInit((a),(b),(c),(d),(e)) -# define EVP_Cipher(a,b,c,d) ssh_EVP_Cipher((a),(b),(c),(d)) -# define EVP_CIPHER_CTX_cleanup(a) ssh_EVP_CIPHER_CTX_cleanup((a)) -# endif /* SSH_OLD_EVP */ - -# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID -# define EVP_DigestUpdate(a,b,c) ssh_EVP_DigestUpdate((a),(b),(c)) -# endif - # ifdef USE_OPENSSL_ENGINE # ifdef OpenSSL_add_all_algorithms # undef OpenSSL_add_all_algorithms @@ -112,23 +88,9 @@ RSA_METHOD *RSA_get_default_method(void); # define OpenSSL_add_all_algorithms() ssh_OpenSSL_add_all_algorithms() # endif -# ifndef HAVE_BN_IS_PRIME_EX -int BN_is_prime_ex(const BIGNUM *, int, BN_CTX *, void *); -# endif - -# ifndef HAVE_DSA_GENERATE_PARAMETERS_EX -int DSA_generate_parameters_ex(DSA *, int, const unsigned char *, int, int *, - unsigned long *, void *); -# endif - -# ifndef HAVE_RSA_GENERATE_KEY_EX -int RSA_generate_key_ex(RSA *, int, BIGNUM *, void *); -# endif - -int ssh_EVP_CipherInit(EVP_CIPHER_CTX *, const EVP_CIPHER *, unsigned char *, - unsigned char *, int); -int ssh_EVP_Cipher(EVP_CIPHER_CTX *, char *, char *, int); -int ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *); void ssh_OpenSSL_add_all_algorithms(void); + #endif /* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */ +#endif /* WITH_OPENSSL */ +#endif /* _OPENSSL_COMPAT_H */ diff --git a/openbsd-compat/port-aix.c b/openbsd-compat/port-aix.c index 0bdefbf..90dabeb 100644 --- a/openbsd-compat/port-aix.c +++ b/openbsd-compat/port-aix.c @@ -26,6 +26,8 @@ */ #include "includes.h" +#ifndef WIN32_FIXME + #include "xmalloc.h" #include "buffer.h" #include "key.h" @@ -86,7 +88,7 @@ aix_usrinfo(struct passwd *pw) fatal("Couldn't set usrinfo: %s", strerror(errno)); debug3("AIX/UsrInfo: set len %d", i); - xfree(cp); + free(cp); } # ifdef WITH_AIXAUTHENTICATE @@ -215,16 +217,14 @@ sys_auth_passwd(Authctxt *ctxt, const char *password) default: /* user can't change(2) or other error (-1) */ logit("Password can't be changed for user %s: %.100s", name, msg); - if (msg) - xfree(msg); + free(msg); authsuccess = 0; } aix_restoreauthdb(); } - if (authmsg != NULL) - xfree(authmsg); + free(authmsg); return authsuccess; } @@ -269,7 +269,7 @@ sys_auth_allowed_user(struct passwd *pw, Buffer *loginmsg) if (!permitted) logit("Login restricted for %s: %.100s", pw->pw_name, msg); - xfree(msg); + free(msg); return permitted; } @@ -472,3 +472,5 @@ out: # endif /* USE_GETGRSET */ #endif /* _AIX */ + +#endif diff --git a/openbsd-compat/port-linux.c b/openbsd-compat/port-linux.c index ea8dff4..f36999d 100644 --- a/openbsd-compat/port-linux.c +++ b/openbsd-compat/port-linux.c @@ -1,4 +1,4 @@ -/* $Id: port-linux.c,v 1.16 2011/08/29 06:09:57 djm Exp $ */ +/* $Id: port-linux.c,v 1.18 2013/06/01 22:07:32 dtucker Exp $ */ /* * Copyright (c) 2005 Daniel Walsh @@ -60,7 +60,7 @@ ssh_selinux_enabled(void) static security_context_t ssh_selinux_getctxbyname(char *pwname) { - security_context_t sc; + security_context_t sc = NULL; char *sename = NULL, *lvl = NULL; int r; @@ -86,6 +86,7 @@ ssh_selinux_getctxbyname(char *pwname) case 0: error("%s: Failed to get default SELinux security " "context for %s", __func__, pwname); + sc = NULL; break; default: fatal("%s: Failed to get default SELinux security " @@ -95,13 +96,11 @@ ssh_selinux_getctxbyname(char *pwname) } #ifdef HAVE_GETSEUSERBYNAME - if (sename != NULL) - xfree(sename); - if (lvl != NULL) - xfree(lvl); + free(sename); + free(lvl); #endif - return (sc); + return sc; } /* Set the execution context to the default for the specified user */ @@ -216,8 +215,8 @@ ssh_selinux_change_context(const char *newname) if (setcon(newctx) < 0) switchlog("%s: setcon %s from %s failed with %s", __func__, newctx, oldctx, strerror(errno)); - xfree(oldctx); - xfree(newctx); + free(oldctx); + free(newctx); } void @@ -279,7 +278,7 @@ oom_adjust_setup(void) verbose("error writing %s: %s", oom_adj_path, strerror(errno)); else - verbose("Set %s from %d to %d", + debug("Set %s from %d to %d", oom_adj_path, oom_adj_save, value); } fclose(fp); @@ -303,7 +302,7 @@ oom_adjust_restore(void) if (fprintf(fp, "%d\n", oom_adj_save) <= 0) verbose("error writing %s: %s", oom_adj_path, strerror(errno)); else - verbose("Set %s to %d", oom_adj_path, oom_adj_save); + debug("Set %s to %d", oom_adj_path, oom_adj_save); fclose(fp); return; diff --git a/openbsd-compat/port-tun.c b/openbsd-compat/port-tun.c index 0d756f7..49e7b4d 100644 --- a/openbsd-compat/port-tun.c +++ b/openbsd-compat/port-tun.c @@ -32,8 +32,9 @@ #include "openbsd-compat/sys-queue.h" #include "log.h" #include "misc.h" -#include "buffer.h" +#include "sshbuf.h" #include "channels.h" +#include "ssherr.h" /* * This is the portable version of the SSH tunnel forwarding, it @@ -210,6 +211,7 @@ sys_tun_infilter(struct Channel *c, char *buf, int len) #endif u_int32_t *af; char *ptr = buf; + int r; #if defined(SSH_TUN_PREPEND_AF) if (len <= 0 || len > (int)(sizeof(rbuf) - sizeof(*af))) @@ -242,7 +244,8 @@ sys_tun_infilter(struct Channel *c, char *buf, int len) *af = htonl(OPENBSD_AF_INET); #endif - buffer_put_string(&c->input, ptr, len); + if ((r = sshbuf_put_string(&c->input, ptr, len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); return (0); } @@ -251,8 +254,14 @@ sys_tun_outfilter(struct Channel *c, u_char **data, u_int *dlen) { u_char *buf; u_int32_t *af; + int r; + size_t xxx_dlen; - *data = buffer_get_string(&c->output, dlen); + /* XXX new API is incompatible with this signature. */ + if ((r = sshbuf_get_string(&c->output, data, &xxx_dlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (dlen != NULL) + *dlen = xxx_dlen; if (*dlen < sizeof(*af)) return (NULL); buf = *data; diff --git a/openbsd-compat/port-uw.c b/openbsd-compat/port-uw.c index b1fbfa2..db24dbb 100644 --- a/openbsd-compat/port-uw.c +++ b/openbsd-compat/port-uw.c @@ -42,6 +42,7 @@ #include "key.h" #include "auth-options.h" #include "log.h" +#include "misc.h" /* servconf.h needs misc.h for struct ForwardOptions */ #include "servconf.h" #include "hostfile.h" #include "auth.h" diff --git a/openbsd-compat/readpassphrase.c b/openbsd-compat/readpassphrase.c index 62b6d0d..d63cdf2 100644 --- a/openbsd-compat/readpassphrase.c +++ b/openbsd-compat/readpassphrase.c @@ -46,6 +46,14 @@ # define _POSIX_VDISABLE VDISABLE #endif +#ifndef _NSIG +# ifdef NSIG +# define _NSIG NSIG +# else +# define _NSIG 128 +# endif +#endif + static volatile sig_atomic_t signo[_NSIG]; static void handler(int); diff --git a/openbsd-compat/reallocarray.c b/openbsd-compat/reallocarray.c new file mode 100644 index 0000000..1a52acc --- /dev/null +++ b/openbsd-compat/reallocarray.c @@ -0,0 +1,46 @@ +/* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */ +/* + * Copyright (c) 2008 Otto Moerbeek + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* OPENBSD ORIGINAL: lib/libc/stdlib/reallocarray.c */ + +#include "includes.h" +#ifndef HAVE_REALLOCARRAY + +#include +#include +#ifdef HAVE_STDINT_H +#include +#endif +#include + +/* + * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX + * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW + */ +#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) + +void * +reallocarray(void *optr, size_t nmemb, size_t size) +{ + if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && + nmemb > 0 && SIZE_MAX / nmemb < size) { + errno = ENOMEM; + return NULL; + } + return realloc(optr, size * nmemb); +} +#endif /* HAVE_REALLOCARRAY */ diff --git a/openbsd-compat/realpath.c b/openbsd-compat/realpath.c index 469048a..836dab3 100644 --- a/openbsd-compat/realpath.c +++ b/openbsd-compat/realpath.c @@ -35,11 +35,13 @@ #if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH) +#include #include #include #include #include +#include #include #include @@ -92,7 +94,7 @@ realpath(const char *path, char resolved[PATH_MAX]) */ p = strchr(left, '/'); s = p ? p : left + left_len; - if (s - left >= sizeof(next_token)) { + if (s - left >= (ptrdiff_t)sizeof(next_token)) { errno = ENAMETOOLONG; return (NULL); } @@ -171,7 +173,8 @@ realpath(const char *path, char resolved[PATH_MAX]) */ if (p != NULL) { if (symlink[slen - 1] != '/') { - if (slen + 1 >= sizeof(symlink)) { + if (slen + 1 >= + (ptrdiff_t)sizeof(symlink)) { errno = ENAMETOOLONG; return (NULL); } diff --git a/openbsd-compat/rmd160.c b/openbsd-compat/rmd160.c new file mode 100644 index 0000000..e915141 --- /dev/null +++ b/openbsd-compat/rmd160.c @@ -0,0 +1,378 @@ +/* + * Copyright (c) 2001 Markus Friedl. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/* + * Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160", + * RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997, + * ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf + */ + +#include "includes.h" + +#ifndef WITH_OPENSSL + +#include +#ifdef HAVE_ENDIAN_H +#include +#endif +#include +#include + +#define PUT_64BIT_LE(cp, value) do { \ + (cp)[7] = (value) >> 56; \ + (cp)[6] = (value) >> 48; \ + (cp)[5] = (value) >> 40; \ + (cp)[4] = (value) >> 32; \ + (cp)[3] = (value) >> 24; \ + (cp)[2] = (value) >> 16; \ + (cp)[1] = (value) >> 8; \ + (cp)[0] = (value); } while (0) + +#define PUT_32BIT_LE(cp, value) do { \ + (cp)[3] = (value) >> 24; \ + (cp)[2] = (value) >> 16; \ + (cp)[1] = (value) >> 8; \ + (cp)[0] = (value); } while (0) + +#define H0 0x67452301U +#define H1 0xEFCDAB89U +#define H2 0x98BADCFEU +#define H3 0x10325476U +#define H4 0xC3D2E1F0U + +#define K0 0x00000000U +#define K1 0x5A827999U +#define K2 0x6ED9EBA1U +#define K3 0x8F1BBCDCU +#define K4 0xA953FD4EU + +#define KK0 0x50A28BE6U +#define KK1 0x5C4DD124U +#define KK2 0x6D703EF3U +#define KK3 0x7A6D76E9U +#define KK4 0x00000000U + +/* rotate x left n bits. */ +#define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n)))) + +#define F0(x, y, z) ((x) ^ (y) ^ (z)) +#define F1(x, y, z) (((x) & (y)) | ((~x) & (z))) +#define F2(x, y, z) (((x) | (~y)) ^ (z)) +#define F3(x, y, z) (((x) & (z)) | ((y) & (~z))) +#define F4(x, y, z) ((x) ^ ((y) | (~z))) + +#define R(a, b, c, d, e, Fj, Kj, sj, rj) \ + do { \ + a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \ + c = ROL(10, c); \ + } while(0) + +#define X(i) x[i] + +static u_int8_t PADDING[RMD160_BLOCK_LENGTH] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +void +RMD160Init(RMD160_CTX *ctx) +{ + ctx->count = 0; + ctx->state[0] = H0; + ctx->state[1] = H1; + ctx->state[2] = H2; + ctx->state[3] = H3; + ctx->state[4] = H4; +} + +void +RMD160Update(RMD160_CTX *ctx, const u_int8_t *input, size_t len) +{ + size_t have, off, need; + + have = (ctx->count / 8) % RMD160_BLOCK_LENGTH; + need = RMD160_BLOCK_LENGTH - have; + ctx->count += 8 * len; + off = 0; + + if (len >= need) { + if (have) { + memcpy(ctx->buffer + have, input, need); + RMD160Transform(ctx->state, ctx->buffer); + off = need; + have = 0; + } + /* now the buffer is empty */ + while (off + RMD160_BLOCK_LENGTH <= len) { + RMD160Transform(ctx->state, input+off); + off += RMD160_BLOCK_LENGTH; + } + } + if (off < len) + memcpy(ctx->buffer + have, input+off, len-off); +} + +void +RMD160Pad(RMD160_CTX *ctx) +{ + u_int8_t size[8]; + size_t padlen; + + PUT_64BIT_LE(size, ctx->count); + + /* + * pad to RMD160_BLOCK_LENGTH byte blocks, at least one byte from + * PADDING plus 8 bytes for the size + */ + padlen = RMD160_BLOCK_LENGTH - ((ctx->count / 8) % RMD160_BLOCK_LENGTH); + if (padlen < 1 + 8) + padlen += RMD160_BLOCK_LENGTH; + RMD160Update(ctx, PADDING, padlen - 8); /* padlen - 8 <= 64 */ + RMD160Update(ctx, size, 8); +} + +void +RMD160Final(u_int8_t digest[RMD160_DIGEST_LENGTH], RMD160_CTX *ctx) +{ + int i; + + RMD160Pad(ctx); + for (i = 0; i < 5; i++) + PUT_32BIT_LE(digest + i*4, ctx->state[i]); + memset(ctx, 0, sizeof (*ctx)); +} + +void +RMD160Transform(u_int32_t state[5], const u_int8_t block[RMD160_BLOCK_LENGTH]) +{ + u_int32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16]; + +#if BYTE_ORDER == LITTLE_ENDIAN + memcpy(x, block, RMD160_BLOCK_LENGTH); +#else + int i; + + for (i = 0; i < 16; i++) + x[i] = (u_int32_t)( + (u_int32_t)(block[i*4 + 0]) | + (u_int32_t)(block[i*4 + 1]) << 8 | + (u_int32_t)(block[i*4 + 2]) << 16 | + (u_int32_t)(block[i*4 + 3]) << 24); +#endif + + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + + /* Round 1 */ + R(a, b, c, d, e, F0, K0, 11, 0); + R(e, a, b, c, d, F0, K0, 14, 1); + R(d, e, a, b, c, F0, K0, 15, 2); + R(c, d, e, a, b, F0, K0, 12, 3); + R(b, c, d, e, a, F0, K0, 5, 4); + R(a, b, c, d, e, F0, K0, 8, 5); + R(e, a, b, c, d, F0, K0, 7, 6); + R(d, e, a, b, c, F0, K0, 9, 7); + R(c, d, e, a, b, F0, K0, 11, 8); + R(b, c, d, e, a, F0, K0, 13, 9); + R(a, b, c, d, e, F0, K0, 14, 10); + R(e, a, b, c, d, F0, K0, 15, 11); + R(d, e, a, b, c, F0, K0, 6, 12); + R(c, d, e, a, b, F0, K0, 7, 13); + R(b, c, d, e, a, F0, K0, 9, 14); + R(a, b, c, d, e, F0, K0, 8, 15); /* #15 */ + /* Round 2 */ + R(e, a, b, c, d, F1, K1, 7, 7); + R(d, e, a, b, c, F1, K1, 6, 4); + R(c, d, e, a, b, F1, K1, 8, 13); + R(b, c, d, e, a, F1, K1, 13, 1); + R(a, b, c, d, e, F1, K1, 11, 10); + R(e, a, b, c, d, F1, K1, 9, 6); + R(d, e, a, b, c, F1, K1, 7, 15); + R(c, d, e, a, b, F1, K1, 15, 3); + R(b, c, d, e, a, F1, K1, 7, 12); + R(a, b, c, d, e, F1, K1, 12, 0); + R(e, a, b, c, d, F1, K1, 15, 9); + R(d, e, a, b, c, F1, K1, 9, 5); + R(c, d, e, a, b, F1, K1, 11, 2); + R(b, c, d, e, a, F1, K1, 7, 14); + R(a, b, c, d, e, F1, K1, 13, 11); + R(e, a, b, c, d, F1, K1, 12, 8); /* #31 */ + /* Round 3 */ + R(d, e, a, b, c, F2, K2, 11, 3); + R(c, d, e, a, b, F2, K2, 13, 10); + R(b, c, d, e, a, F2, K2, 6, 14); + R(a, b, c, d, e, F2, K2, 7, 4); + R(e, a, b, c, d, F2, K2, 14, 9); + R(d, e, a, b, c, F2, K2, 9, 15); + R(c, d, e, a, b, F2, K2, 13, 8); + R(b, c, d, e, a, F2, K2, 15, 1); + R(a, b, c, d, e, F2, K2, 14, 2); + R(e, a, b, c, d, F2, K2, 8, 7); + R(d, e, a, b, c, F2, K2, 13, 0); + R(c, d, e, a, b, F2, K2, 6, 6); + R(b, c, d, e, a, F2, K2, 5, 13); + R(a, b, c, d, e, F2, K2, 12, 11); + R(e, a, b, c, d, F2, K2, 7, 5); + R(d, e, a, b, c, F2, K2, 5, 12); /* #47 */ + /* Round 4 */ + R(c, d, e, a, b, F3, K3, 11, 1); + R(b, c, d, e, a, F3, K3, 12, 9); + R(a, b, c, d, e, F3, K3, 14, 11); + R(e, a, b, c, d, F3, K3, 15, 10); + R(d, e, a, b, c, F3, K3, 14, 0); + R(c, d, e, a, b, F3, K3, 15, 8); + R(b, c, d, e, a, F3, K3, 9, 12); + R(a, b, c, d, e, F3, K3, 8, 4); + R(e, a, b, c, d, F3, K3, 9, 13); + R(d, e, a, b, c, F3, K3, 14, 3); + R(c, d, e, a, b, F3, K3, 5, 7); + R(b, c, d, e, a, F3, K3, 6, 15); + R(a, b, c, d, e, F3, K3, 8, 14); + R(e, a, b, c, d, F3, K3, 6, 5); + R(d, e, a, b, c, F3, K3, 5, 6); + R(c, d, e, a, b, F3, K3, 12, 2); /* #63 */ + /* Round 5 */ + R(b, c, d, e, a, F4, K4, 9, 4); + R(a, b, c, d, e, F4, K4, 15, 0); + R(e, a, b, c, d, F4, K4, 5, 5); + R(d, e, a, b, c, F4, K4, 11, 9); + R(c, d, e, a, b, F4, K4, 6, 7); + R(b, c, d, e, a, F4, K4, 8, 12); + R(a, b, c, d, e, F4, K4, 13, 2); + R(e, a, b, c, d, F4, K4, 12, 10); + R(d, e, a, b, c, F4, K4, 5, 14); + R(c, d, e, a, b, F4, K4, 12, 1); + R(b, c, d, e, a, F4, K4, 13, 3); + R(a, b, c, d, e, F4, K4, 14, 8); + R(e, a, b, c, d, F4, K4, 11, 11); + R(d, e, a, b, c, F4, K4, 8, 6); + R(c, d, e, a, b, F4, K4, 5, 15); + R(b, c, d, e, a, F4, K4, 6, 13); /* #79 */ + + aa = a ; bb = b; cc = c; dd = d; ee = e; + + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + + /* Parallel round 1 */ + R(a, b, c, d, e, F4, KK0, 8, 5); + R(e, a, b, c, d, F4, KK0, 9, 14); + R(d, e, a, b, c, F4, KK0, 9, 7); + R(c, d, e, a, b, F4, KK0, 11, 0); + R(b, c, d, e, a, F4, KK0, 13, 9); + R(a, b, c, d, e, F4, KK0, 15, 2); + R(e, a, b, c, d, F4, KK0, 15, 11); + R(d, e, a, b, c, F4, KK0, 5, 4); + R(c, d, e, a, b, F4, KK0, 7, 13); + R(b, c, d, e, a, F4, KK0, 7, 6); + R(a, b, c, d, e, F4, KK0, 8, 15); + R(e, a, b, c, d, F4, KK0, 11, 8); + R(d, e, a, b, c, F4, KK0, 14, 1); + R(c, d, e, a, b, F4, KK0, 14, 10); + R(b, c, d, e, a, F4, KK0, 12, 3); + R(a, b, c, d, e, F4, KK0, 6, 12); /* #15 */ + /* Parallel round 2 */ + R(e, a, b, c, d, F3, KK1, 9, 6); + R(d, e, a, b, c, F3, KK1, 13, 11); + R(c, d, e, a, b, F3, KK1, 15, 3); + R(b, c, d, e, a, F3, KK1, 7, 7); + R(a, b, c, d, e, F3, KK1, 12, 0); + R(e, a, b, c, d, F3, KK1, 8, 13); + R(d, e, a, b, c, F3, KK1, 9, 5); + R(c, d, e, a, b, F3, KK1, 11, 10); + R(b, c, d, e, a, F3, KK1, 7, 14); + R(a, b, c, d, e, F3, KK1, 7, 15); + R(e, a, b, c, d, F3, KK1, 12, 8); + R(d, e, a, b, c, F3, KK1, 7, 12); + R(c, d, e, a, b, F3, KK1, 6, 4); + R(b, c, d, e, a, F3, KK1, 15, 9); + R(a, b, c, d, e, F3, KK1, 13, 1); + R(e, a, b, c, d, F3, KK1, 11, 2); /* #31 */ + /* Parallel round 3 */ + R(d, e, a, b, c, F2, KK2, 9, 15); + R(c, d, e, a, b, F2, KK2, 7, 5); + R(b, c, d, e, a, F2, KK2, 15, 1); + R(a, b, c, d, e, F2, KK2, 11, 3); + R(e, a, b, c, d, F2, KK2, 8, 7); + R(d, e, a, b, c, F2, KK2, 6, 14); + R(c, d, e, a, b, F2, KK2, 6, 6); + R(b, c, d, e, a, F2, KK2, 14, 9); + R(a, b, c, d, e, F2, KK2, 12, 11); + R(e, a, b, c, d, F2, KK2, 13, 8); + R(d, e, a, b, c, F2, KK2, 5, 12); + R(c, d, e, a, b, F2, KK2, 14, 2); + R(b, c, d, e, a, F2, KK2, 13, 10); + R(a, b, c, d, e, F2, KK2, 13, 0); + R(e, a, b, c, d, F2, KK2, 7, 4); + R(d, e, a, b, c, F2, KK2, 5, 13); /* #47 */ + /* Parallel round 4 */ + R(c, d, e, a, b, F1, KK3, 15, 8); + R(b, c, d, e, a, F1, KK3, 5, 6); + R(a, b, c, d, e, F1, KK3, 8, 4); + R(e, a, b, c, d, F1, KK3, 11, 1); + R(d, e, a, b, c, F1, KK3, 14, 3); + R(c, d, e, a, b, F1, KK3, 14, 11); + R(b, c, d, e, a, F1, KK3, 6, 15); + R(a, b, c, d, e, F1, KK3, 14, 0); + R(e, a, b, c, d, F1, KK3, 6, 5); + R(d, e, a, b, c, F1, KK3, 9, 12); + R(c, d, e, a, b, F1, KK3, 12, 2); + R(b, c, d, e, a, F1, KK3, 9, 13); + R(a, b, c, d, e, F1, KK3, 12, 9); + R(e, a, b, c, d, F1, KK3, 5, 7); + R(d, e, a, b, c, F1, KK3, 15, 10); + R(c, d, e, a, b, F1, KK3, 8, 14); /* #63 */ + /* Parallel round 5 */ + R(b, c, d, e, a, F0, KK4, 8, 12); + R(a, b, c, d, e, F0, KK4, 5, 15); + R(e, a, b, c, d, F0, KK4, 12, 10); + R(d, e, a, b, c, F0, KK4, 9, 4); + R(c, d, e, a, b, F0, KK4, 12, 1); + R(b, c, d, e, a, F0, KK4, 5, 5); + R(a, b, c, d, e, F0, KK4, 14, 8); + R(e, a, b, c, d, F0, KK4, 6, 7); + R(d, e, a, b, c, F0, KK4, 8, 6); + R(c, d, e, a, b, F0, KK4, 13, 2); + R(b, c, d, e, a, F0, KK4, 6, 13); + R(a, b, c, d, e, F0, KK4, 5, 14); + R(e, a, b, c, d, F0, KK4, 15, 0); + R(d, e, a, b, c, F0, KK4, 13, 3); + R(c, d, e, a, b, F0, KK4, 11, 9); + R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */ + + t = state[1] + cc + d; + state[1] = state[2] + dd + e; + state[2] = state[3] + ee + a; + state[3] = state[4] + aa + b; + state[4] = state[0] + bb + c; + state[0] = t; +} + +#endif /* !WITH_OPENSSL */ diff --git a/openbsd-compat/rmd160.h b/openbsd-compat/rmd160.h new file mode 100644 index 0000000..99c1dcd --- /dev/null +++ b/openbsd-compat/rmd160.h @@ -0,0 +1,61 @@ +/* $OpenBSD: rmd160.h,v 1.17 2012/12/05 23:19:57 deraadt Exp $ */ +/* + * Copyright (c) 2001 Markus Friedl. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _RMD160_H +#define _RMD160_H + +#ifndef WITH_OPENSSL + +#define RMD160_BLOCK_LENGTH 64 +#define RMD160_DIGEST_LENGTH 20 +#define RMD160_DIGEST_STRING_LENGTH (RMD160_DIGEST_LENGTH * 2 + 1) + +/* RMD160 context. */ +typedef struct RMD160Context { + u_int32_t state[5]; /* state */ + u_int64_t count; /* number of bits, mod 2^64 */ + u_int8_t buffer[RMD160_BLOCK_LENGTH]; /* input buffer */ +} RMD160_CTX; + +void RMD160Init(RMD160_CTX *); +void RMD160Transform(u_int32_t [5], const u_int8_t [RMD160_BLOCK_LENGTH]) + __attribute__((__bounded__(__minbytes__,1,5))) + __attribute__((__bounded__(__minbytes__,2,RMD160_BLOCK_LENGTH))); +void RMD160Update(RMD160_CTX *, const u_int8_t *, size_t) + __attribute__((__bounded__(__string__,2,3))); +void RMD160Pad(RMD160_CTX *); +void RMD160Final(u_int8_t [RMD160_DIGEST_LENGTH], RMD160_CTX *) + __attribute__((__bounded__(__minbytes__,1,RMD160_DIGEST_LENGTH))); +char *RMD160End(RMD160_CTX *, char *) + __attribute__((__bounded__(__minbytes__,2,RMD160_DIGEST_STRING_LENGTH))); +char *RMD160File(const char *, char *) + __attribute__((__bounded__(__minbytes__,2,RMD160_DIGEST_STRING_LENGTH))); +char *RMD160FileChunk(const char *, char *, off_t, off_t) + __attribute__((__bounded__(__minbytes__,2,RMD160_DIGEST_STRING_LENGTH))); +char *RMD160Data(const u_int8_t *, size_t, char *) + __attribute__((__bounded__(__string__,1,2))) + __attribute__((__bounded__(__minbytes__,3,RMD160_DIGEST_STRING_LENGTH))); + +#endif /* !WITH_OPENSSL */ +#endif /* _RMD160_H */ diff --git a/openbsd-compat/setenv.c b/openbsd-compat/setenv.c index e2a8b6d..373b701 100644 --- a/openbsd-compat/setenv.c +++ b/openbsd-compat/setenv.c @@ -1,4 +1,4 @@ -/* $OpenBSD: setenv.c,v 1.9 2005/08/08 08:05:37 espie Exp $ */ +/* $OpenBSD: setenv.c,v 1.13 2010/08/23 22:31:50 millert Exp $ */ /* * Copyright (c) 1987 Regents of the University of California. * All rights reserved. @@ -31,35 +31,38 @@ /* OPENBSD ORIGINAL: lib/libc/stdlib/setenv.c */ #include "includes.h" + #if !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV) +#include #include #include extern char **environ; +static char **lastenv; /* last value of environ */ /* OpenSSH Portable: __findenv is from getenv.c rev 1.8, made static */ /* * __findenv -- * Returns pointer to value associated with name, if any, else NULL. + * Starts searching within the environmental array at offset. * Sets offset to be the offset of the name/value combination in the - * environmental array, for use by setenv(3) and unsetenv(3). + * environmental array, for use by putenv(3), setenv(3) and unsetenv(3). * Explicitly removes '=' in argument name. + * + * This routine *should* be a static; don't use it. */ static char * -__findenv(const char *name, size_t *offset) +__findenv(const char *name, int len, int *offset) { extern char **environ; - int len, i; + int i; const char *np; char **p, *cp; if (name == NULL || environ == NULL) return (NULL); - for (np = name; *np && *np != '='; ++np) - ; - len = np - name; - for (p = environ; (cp = *p) != NULL; ++p) { + for (p = environ + *offset; (cp = *p) != NULL; ++p) { for (np = name, i = len; i && *cp; i--) if (*cp++ != *np++) break; @@ -71,6 +74,54 @@ __findenv(const char *name, size_t *offset) return (NULL); } +#if 0 /* nothing uses putenv */ +/* + * putenv -- + * Add a name=value string directly to the environmental, replacing + * any current value. + */ +int +putenv(char *str) +{ + char **P, *cp; + size_t cnt; + int offset = 0; + + for (cp = str; *cp && *cp != '='; ++cp) + ; + if (*cp != '=') { + errno = EINVAL; + return (-1); /* missing `=' in string */ + } + + if (__findenv(str, (int)(cp - str), &offset) != NULL) { + environ[offset++] = str; + /* could be set multiple times */ + while (__findenv(str, (int)(cp - str), &offset)) { + for (P = &environ[offset];; ++P) + if (!(*P = *(P + 1))) + break; + } + return (0); + } + + /* create new slot for string */ + for (P = environ; *P != NULL; P++) + ; + cnt = P - environ; + P = (char **)realloc(lastenv, sizeof(char *) * (cnt + 2)); + if (!P) + return (-1); + if (lastenv != environ) + memcpy(P, environ, cnt * sizeof(char *)); + lastenv = environ = P; + environ[cnt] = str; + environ[cnt + 1] = NULL; + return (0); +} + +#endif + #ifndef HAVE_SETENV /* * setenv -- @@ -80,24 +131,39 @@ __findenv(const char *name, size_t *offset) int setenv(const char *name, const char *value, int rewrite) { - static char **lastenv; /* last value of environ */ - char *C; - size_t l_value, offset; + char *C, **P; + const char *np; + int l_value, offset = 0; + + for (np = name; *np && *np != '='; ++np) + ; +#ifdef notyet + if (*np) { + errno = EINVAL; + return (-1); /* has `=' in name */ + } +#endif - if (*value == '=') /* no `=' in value */ - ++value; l_value = strlen(value); - if ((C = __findenv(name, &offset))) { /* find if already exists */ + if ((C = __findenv(name, (int)(np - name), &offset)) != NULL) { + int tmpoff = offset + 1; if (!rewrite) return (0); +#if 0 /* XXX - existing entry may not be writable */ if (strlen(C) >= l_value) { /* old larger; copy over */ while ((*C++ = *value++)) ; return (0); } +#endif + /* could be set multiple times */ + while (__findenv(name, (int)(np - name), &tmpoff)) { + for (P = &environ[tmpoff];; ++P) + if (!(*P = *(P + 1))) + break; + } } else { /* create new slot */ size_t cnt; - char **P; for (P = environ; *P != NULL; P++) ; @@ -111,10 +177,8 @@ setenv(const char *name, const char *value, int rewrite) offset = cnt; environ[cnt + 1] = NULL; } - for (C = (char *)name; *C && *C != '='; ++C) - ; /* no `=' in name */ if (!(environ[offset] = /* name + `=' + value */ - malloc((size_t)((int)(C - name) + l_value + 2)))) + malloc((size_t)((int)(np - name) + l_value + 2)))) return (-1); for (C = environ[offset]; (*C = *name++) && *C != '='; ++C) ; @@ -122,6 +186,7 @@ setenv(const char *name, const char *value, int rewrite) ; return (0); } + #endif /* HAVE_SETENV */ #ifndef HAVE_UNSETENV @@ -129,17 +194,33 @@ setenv(const char *name, const char *value, int rewrite) * unsetenv(name) -- * Delete environmental variable "name". */ -void +int unsetenv(const char *name) { char **P; - size_t offset; + const char *np; + int offset = 0; - while (__findenv(name, &offset)) /* if set multiple times */ + if (!name || !*name) { + errno = EINVAL; + return (-1); + } + for (np = name; *np && *np != '='; ++np) + ; + if (*np) { + errno = EINVAL; + return (-1); /* has `=' in name */ + } + + /* could be set multiple times */ + while (__findenv(name, (int)(np - name), &offset)) { for (P = &environ[offset];; ++P) if (!(*P = *(P + 1))) break; + } + return (0); } #endif /* HAVE_UNSETENV */ #endif /* !defined(HAVE_SETENV) || !defined(HAVE_UNSETENV) */ + diff --git a/openbsd-compat/setproctitle.c b/openbsd-compat/setproctitle.c index 2965f68..9f7ca14 100644 --- a/openbsd-compat/setproctitle.c +++ b/openbsd-compat/setproctitle.c @@ -67,7 +67,8 @@ static size_t argv_env_len = 0; void compat_init_setproctitle(int argc, char *argv[]) { -#if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV +#if !defined(HAVE_SETPROCTITLE) && \ + defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV extern char **environ; char *lastargv = NULL; char **envp = environ; @@ -125,6 +126,7 @@ setproctitle(const char *fmt, ...) va_list ap; char buf[1024], ptitle[1024]; size_t len; + int r; extern char *__progname; #if SPT_TYPE == SPT_PSTAT union pstun pst; @@ -137,13 +139,16 @@ setproctitle(const char *fmt, ...) strlcpy(buf, __progname, sizeof(buf)); + r = -1; va_start(ap, fmt); if (fmt != NULL) { len = strlcat(buf, ": ", sizeof(buf)); if (len < sizeof(buf)) - vsnprintf(buf + len, sizeof(buf) - len , fmt, ap); + r = vsnprintf(buf + len, sizeof(buf) - len , fmt, ap); } va_end(ap); + if (r == -1 || (size_t)r >= sizeof(buf) - len) + return; strnvis(ptitle, buf, sizeof(ptitle), VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL); diff --git a/openbsd-compat/sha1.c b/openbsd-compat/sha1.c new file mode 100644 index 0000000..4b5381f --- /dev/null +++ b/openbsd-compat/sha1.c @@ -0,0 +1,177 @@ +/* $OpenBSD: sha1.c,v 1.23 2014/01/08 06:14:57 tedu Exp $ */ + +/* + * SHA-1 in C + * By Steve Reid + * 100% Public Domain + * + * Test Vectors (from FIPS PUB 180-1) + * "abc" + * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D + * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" + * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 + * A million repetitions of "a" + * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F + */ + +#include "includes.h" + +#ifndef WITH_OPENSSL + +#include +#include + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +/* + * blk0() and blk() perform the initial expand. + * I got the idea of expanding during the round function from SSLeay + */ +#if BYTE_ORDER == LITTLE_ENDIAN +# define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ + |(rol(block->l[i],8)&0x00FF00FF)) +#else +# define blk0(i) block->l[i] +#endif +#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ + ^block->l[(i+2)&15]^block->l[i&15],1)) + +/* + * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 + */ +#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); +#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); +#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); + +typedef union { + u_int8_t c[64]; + u_int32_t l[16]; +} CHAR64LONG16; + +/* + * Hash a single 512-bit block. This is the core of the algorithm. + */ +void +SHA1Transform(u_int32_t state[5], const u_int8_t buffer[SHA1_BLOCK_LENGTH]) +{ + u_int32_t a, b, c, d, e; + u_int8_t workspace[SHA1_BLOCK_LENGTH]; + CHAR64LONG16 *block = (CHAR64LONG16 *)workspace; + + (void)memcpy(block, buffer, SHA1_BLOCK_LENGTH); + + /* Copy context->state[] to working vars */ + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + + /* 4 rounds of 20 operations each. Loop unrolled. */ + R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); + R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); + R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); + R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); + R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); + R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); + R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); + R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); + R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); + R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); + R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); + R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); + R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); + R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); + R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); + R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); + R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); + R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); + R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); + R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); + + /* Add the working vars back into context.state[] */ + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + + /* Wipe variables */ + a = b = c = d = e = 0; +} + + +/* + * SHA1Init - Initialize new context + */ +void +SHA1Init(SHA1_CTX *context) +{ + + /* SHA1 initialization constants */ + context->count = 0; + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; +} + + +/* + * Run your data through this. + */ +void +SHA1Update(SHA1_CTX *context, const u_int8_t *data, size_t len) +{ + size_t i, j; + + j = (size_t)((context->count >> 3) & 63); + context->count += (len << 3); + if ((j + len) > 63) { + (void)memcpy(&context->buffer[j], data, (i = 64-j)); + SHA1Transform(context->state, context->buffer); + for ( ; i + 63 < len; i += 64) + SHA1Transform(context->state, (u_int8_t *)&data[i]); + j = 0; + } else { + i = 0; + } + (void)memcpy(&context->buffer[j], &data[i], len - i); +} + + +/* + * Add padding and return the message digest. + */ +void +SHA1Pad(SHA1_CTX *context) +{ + u_int8_t finalcount[8]; + u_int i; + + for (i = 0; i < 8; i++) { + finalcount[i] = (u_int8_t)((context->count >> + ((7 - (i & 7)) * 8)) & 255); /* Endian independent */ + } + SHA1Update(context, (u_int8_t *)"\200", 1); + while ((context->count & 504) != 448) + SHA1Update(context, (u_int8_t *)"\0", 1); + SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */ +} + +void +SHA1Final(u_int8_t digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context) +{ + u_int i; + + SHA1Pad(context); + for (i = 0; i < SHA1_DIGEST_LENGTH; i++) { + digest[i] = (u_int8_t) + ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); + } + memset(context, 0, sizeof(*context)); +} +#endif /* !WITH_OPENSSL */ diff --git a/openbsd-compat/sha1.h b/openbsd-compat/sha1.h new file mode 100644 index 0000000..327d94c --- /dev/null +++ b/openbsd-compat/sha1.h @@ -0,0 +1,58 @@ +/* $OpenBSD: sha1.h,v 1.24 2012/12/05 23:19:57 deraadt Exp $ */ + +/* + * SHA-1 in C + * By Steve Reid + * 100% Public Domain + */ + +#ifndef _SHA1_H +#define _SHA1_H + +#ifndef WITH_OPENSSL + +#define SHA1_BLOCK_LENGTH 64 +#define SHA1_DIGEST_LENGTH 20 +#define SHA1_DIGEST_STRING_LENGTH (SHA1_DIGEST_LENGTH * 2 + 1) + +typedef struct { + u_int32_t state[5]; + u_int64_t count; + u_int8_t buffer[SHA1_BLOCK_LENGTH]; +} SHA1_CTX; + +void SHA1Init(SHA1_CTX *); +void SHA1Pad(SHA1_CTX *); +void SHA1Transform(u_int32_t [5], const u_int8_t [SHA1_BLOCK_LENGTH]) + __attribute__((__bounded__(__minbytes__,1,5))) + __attribute__((__bounded__(__minbytes__,2,SHA1_BLOCK_LENGTH))); +void SHA1Update(SHA1_CTX *, const u_int8_t *, size_t) + __attribute__((__bounded__(__string__,2,3))); +void SHA1Final(u_int8_t [SHA1_DIGEST_LENGTH], SHA1_CTX *) + __attribute__((__bounded__(__minbytes__,1,SHA1_DIGEST_LENGTH))); +char *SHA1End(SHA1_CTX *, char *) + __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH))); +char *SHA1File(const char *, char *) + __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH))); +char *SHA1FileChunk(const char *, char *, off_t, off_t) + __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH))); +char *SHA1Data(const u_int8_t *, size_t, char *) + __attribute__((__bounded__(__string__,1,2))) + __attribute__((__bounded__(__minbytes__,3,SHA1_DIGEST_STRING_LENGTH))); + +#define HTONDIGEST(x) do { \ + x[0] = htonl(x[0]); \ + x[1] = htonl(x[1]); \ + x[2] = htonl(x[2]); \ + x[3] = htonl(x[3]); \ + x[4] = htonl(x[4]); } while (0) + +#define NTOHDIGEST(x) do { \ + x[0] = ntohl(x[0]); \ + x[1] = ntohl(x[1]); \ + x[2] = ntohl(x[2]); \ + x[3] = ntohl(x[3]); \ + x[4] = ntohl(x[4]); } while (0) + +#endif /* !WITH_OPENSSL */ +#endif /* _SHA1_H */ diff --git a/openbsd-compat/sha2.c b/openbsd-compat/sha2.c index cf8e0ad..737935d 100644 --- a/openbsd-compat/sha2.c +++ b/openbsd-compat/sha2.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sha2.c,v 1.11 2005/08/08 08:05:35 espie Exp $ */ +/* from OpenBSD: sha2.c,v 1.11 2005/08/08 08:05:35 espie Exp */ /* * FILE: sha2.c @@ -38,13 +38,18 @@ #include "includes.h" -#include +#ifdef WITH_OPENSSL +# include +# if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) +# define _NEED_SHA2 1 +# endif +#else +# define _NEED_SHA2 1 +#endif + +#if defined(_NEED_SHA2) && !defined(HAVE_SHA256_UPDATE) -#if !defined(HAVE_EVP_SHA256) && !defined(HAVE_SHA256_UPDATE) && \ - (OPENSSL_VERSION_NUMBER >= 0x00907000L) -#include #include -#include "sha2.h" /* * UNROLLED TRANSFORM LOOP NOTE: @@ -838,7 +843,6 @@ SHA512_Final(u_int8_t digest[SHA512_DIGEST_LENGTH], SHA512_CTX *context) } -#if 0 /*** SHA-384: *********************************************************/ void SHA384_Init(SHA384_CTX *context) @@ -851,9 +855,29 @@ SHA384_Init(SHA384_CTX *context) context->bitcount[0] = context->bitcount[1] = 0; } +#if 0 __weak_alias(SHA384_Transform, SHA512_Transform); __weak_alias(SHA384_Update, SHA512_Update); __weak_alias(SHA384_Pad, SHA512_Pad); +#endif + +void +SHA384_Transform(u_int64_t state[8], const u_int8_t data[SHA512_BLOCK_LENGTH]) +{ + return SHA512_Transform(state, data); +} + +void +SHA384_Update(SHA512_CTX *context, const u_int8_t *data, size_t len) +{ + SHA512_Update(context, data, len); +} + +void +SHA384_Pad(SHA512_CTX *context) +{ + SHA512_Pad(context); +} void SHA384_Final(u_int8_t digest[SHA384_DIGEST_LENGTH], SHA384_CTX *context) @@ -876,7 +900,5 @@ SHA384_Final(u_int8_t digest[SHA384_DIGEST_LENGTH], SHA384_CTX *context) /* Zero out state data */ memset(context, 0, sizeof(*context)); } -#endif -#endif /* !defined(HAVE_EVP_SHA256) && !defined(HAVE_SHA256_UPDATE) && \ - (OPENSSL_VERSION_NUMBER >= 0x00907000L) */ +#endif /* defined(_NEED_SHA2) && !defined(HAVE_SHA256_UPDATE) */ diff --git a/openbsd-compat/sha2.h b/openbsd-compat/sha2.h index 821f2dd..c8bfc3c 100644 --- a/openbsd-compat/sha2.h +++ b/openbsd-compat/sha2.h @@ -1,4 +1,4 @@ -/* $OpenBSD: sha2.h,v 1.6 2004/06/22 01:57:30 jfb Exp $ */ +/* OpenBSD: sha2.h,v 1.6 2004/06/22 01:57:30 jfb Exp */ /* * FILE: sha2.h @@ -41,10 +41,16 @@ #include "includes.h" -#include +#ifdef WITH_OPENSSL +# include +# if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) +# define _NEED_SHA2 1 +# endif +#else +# define _NEED_SHA2 1 +#endif -#if !defined(HAVE_EVP_SHA256) && !defined(HAVE_SHA256_UPDATE) && \ - (OPENSSL_VERSION_NUMBER >= 0x00907000L) +#if defined(_NEED_SHA2) && !defined(HAVE_SHA256_UPDATE) /*** SHA-256/384/512 Various Length Definitions ***********************/ #define SHA256_BLOCK_LENGTH 64 @@ -70,9 +76,7 @@ typedef struct _SHA512_CTX { u_int8_t buffer[SHA512_BLOCK_LENGTH]; } SHA512_CTX; -#if 0 typedef SHA512_CTX SHA384_CTX; -#endif void SHA256_Init(SHA256_CTX *); void SHA256_Transform(u_int32_t state[8], const u_int8_t [SHA256_BLOCK_LENGTH]); @@ -91,7 +95,6 @@ char *SHA256_Data(const u_int8_t *, size_t, char *) __attribute__((__bounded__(__string__,1,2))) __attribute__((__bounded__(__minbytes__,3,SHA256_DIGEST_STRING_LENGTH))); -#if 0 void SHA384_Init(SHA384_CTX *); void SHA384_Transform(u_int64_t state[8], const u_int8_t [SHA384_BLOCK_LENGTH]); void SHA384_Update(SHA384_CTX *, const u_int8_t *, size_t) @@ -108,7 +111,6 @@ char *SHA384_FileChunk(const char *, char *, off_t, off_t) char *SHA384_Data(const u_int8_t *, size_t, char *) __attribute__((__bounded__(__string__,1,2))) __attribute__((__bounded__(__minbytes__,3,SHA384_DIGEST_STRING_LENGTH))); -#endif /* 0 */ void SHA512_Init(SHA512_CTX *); void SHA512_Transform(u_int64_t state[8], const u_int8_t [SHA512_BLOCK_LENGTH]); @@ -127,7 +129,6 @@ char *SHA512_Data(const u_int8_t *, size_t, char *) __attribute__((__bounded__(__string__,1,2))) __attribute__((__bounded__(__minbytes__,3,SHA512_DIGEST_STRING_LENGTH))); -#endif /* !defined(HAVE_EVP_SHA256) && !defined(HAVE_SHA256_UPDATE) && \ - (OPENSSL_VERSION_NUMBER >= 0x00907000L) */ +#endif /* defined(_NEED_SHA2) && !defined(HAVE_SHA256_UPDATE) */ #endif /* _SSHSHA2_H */ diff --git a/openbsd-compat/strlcpy.c b/openbsd-compat/strlcpy.c index 679a5b2..b4b1b60 100644 --- a/openbsd-compat/strlcpy.c +++ b/openbsd-compat/strlcpy.c @@ -1,4 +1,4 @@ -/* $OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */ +/* $OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $ */ /* * Copyright (c) 1998 Todd C. Miller @@ -37,11 +37,11 @@ strlcpy(char *dst, const char *src, size_t siz) size_t n = siz; /* Copy as many bytes as will fit */ - if (n != 0 && --n != 0) { - do { - if ((*d++ = *s++) == 0) + if (n != 0) { + while (--n != 0) { + if ((*d++ = *s++) == '\0') break; - } while (--n != 0); + } } /* Not enough room in dst, add NUL and traverse rest of src */ diff --git a/openbsd-compat/strnlen.c b/openbsd-compat/strnlen.c new file mode 100644 index 0000000..93d5155 --- /dev/null +++ b/openbsd-compat/strnlen.c @@ -0,0 +1,37 @@ +/* $OpenBSD: strnlen.c,v 1.3 2010/06/02 12:58:12 millert Exp $ */ + +/* + * Copyright (c) 2010 Todd C. Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* OPENBSD ORIGINAL: lib/libc/string/strnlen.c */ + +#include "config.h" +#ifndef HAVE_STRNLEN +#include + +#include + +size_t +strnlen(const char *str, size_t maxlen) +{ + const char *cp; + + for (cp = str; maxlen != 0 && *cp != '\0'; cp++, maxlen--) + ; + + return (size_t)(cp - str); +} +#endif diff --git a/openbsd-compat/strtoull.c b/openbsd-compat/strtoull.c new file mode 100644 index 0000000..f7c818c --- /dev/null +++ b/openbsd-compat/strtoull.c @@ -0,0 +1,110 @@ +/* $OpenBSD: strtoull.c,v 1.5 2005/08/08 08:05:37 espie Exp $ */ +/*- + * Copyright (c) 1992 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* OPENBSD ORIGINAL: lib/libc/stdlib/strtoull.c */ + +#include "includes.h" +#ifndef HAVE_STRTOULL + +#include + +#include +#include +#include +#include + +/* + * Convert a string to an unsigned long long. + * + * Ignores `locale' stuff. Assumes that the upper and lower case + * alphabets and digits are each contiguous. + */ +unsigned long long +strtoull(const char *nptr, char **endptr, int base) +{ + const char *s; + unsigned long long acc, cutoff; + int c; + int neg, any, cutlim; + + /* + * See strtoq for comments as to the logic used. + */ + s = nptr; + do { + c = (unsigned char) *s++; + } while (isspace(c)); + if (c == '-') { + neg = 1; + c = *s++; + } else { + neg = 0; + if (c == '+') + c = *s++; + } + if ((base == 0 || base == 16) && + c == '0' && (*s == 'x' || *s == 'X')) { + c = s[1]; + s += 2; + base = 16; + } + if (base == 0) + base = c == '0' ? 8 : 10; + + cutoff = ULLONG_MAX / (unsigned long long)base; + cutlim = ULLONG_MAX % (unsigned long long)base; + for (acc = 0, any = 0;; c = (unsigned char) *s++) { + if (isdigit(c)) + c -= '0'; + else if (isalpha(c)) + c -= isupper(c) ? 'A' - 10 : 'a' - 10; + else + break; + if (c >= base) + break; + if (any < 0) + continue; + if (acc > cutoff || (acc == cutoff && c > cutlim)) { + any = -1; + acc = ULLONG_MAX; + errno = ERANGE; + } else { + any = 1; + acc *= (unsigned long long)base; + acc += c; + } + } + if (neg && any > 0) + acc = -acc; + if (endptr != 0) + *endptr = (char *) (any ? s - 1 : nptr); + return (acc); +} +#endif /* !HAVE_STRTOULL */ diff --git a/openbsd-compat/sys-queue.h b/openbsd-compat/sys-queue.h index 5cf0587..28aaaa3 100644 --- a/openbsd-compat/sys-queue.h +++ b/openbsd-compat/sys-queue.h @@ -1,4 +1,4 @@ -/* $OpenBSD: queue.h,v 1.32 2007/04/30 18:42:34 pedro Exp $ */ +/* $OpenBSD: queue.h,v 1.36 2012/04/11 13:29:14 naddy Exp $ */ /* $NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft Exp $ */ /* @@ -202,10 +202,10 @@ struct { \ (var) != SLIST_END(head); \ (var) = SLIST_NEXT(var, field)) -#define SLIST_FOREACH_PREVPTR(var, varp, head, field) \ - for ((varp) = &SLIST_FIRST((head)); \ - ((var) = *(varp)) != SLIST_END(head); \ - (varp) = &SLIST_NEXT((var), field)) +#define SLIST_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = SLIST_FIRST(head); \ + (var) && ((tvar) = SLIST_NEXT(var, field), 1); \ + (var) = (tvar)) /* * Singly-linked List functions. @@ -224,7 +224,7 @@ struct { \ (head)->slh_first = (elm); \ } while (0) -#define SLIST_REMOVE_NEXT(head, elm, field) do { \ +#define SLIST_REMOVE_AFTER(elm, field) do { \ (elm)->field.sle_next = (elm)->field.sle_next->field.sle_next; \ } while (0) @@ -276,6 +276,11 @@ struct { \ (var)!= LIST_END(head); \ (var) = LIST_NEXT(var, field)) +#define LIST_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = LIST_FIRST(head); \ + (var) && ((tvar) = LIST_NEXT(var, field), 1); \ + (var) = (tvar)) + /* * List functions. */ @@ -354,6 +359,11 @@ struct { \ (var) != SIMPLEQ_END(head); \ (var) = SIMPLEQ_NEXT(var, field)) +#define SIMPLEQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = SIMPLEQ_FIRST(head); \ + (var) && ((tvar) = SIMPLEQ_NEXT(var, field), 1); \ + (var) = (tvar)) + /* * Simple queue functions. */ @@ -385,6 +395,12 @@ struct { \ (head)->sqh_last = &(head)->sqh_first; \ } while (0) +#define SIMPLEQ_REMOVE_AFTER(head, elm, field) do { \ + if (((elm)->field.sqe_next = (elm)->field.sqe_next->field.sqe_next) \ + == NULL) \ + (head)->sqh_last = &(elm)->field.sqe_next; \ +} while (0) + /* * Tail queue definitions. */ @@ -422,11 +438,24 @@ struct { \ (var) != TAILQ_END(head); \ (var) = TAILQ_NEXT(var, field)) +#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = TAILQ_FIRST(head); \ + (var) != TAILQ_END(head) && \ + ((tvar) = TAILQ_NEXT(var, field), 1); \ + (var) = (tvar)) + + #define TAILQ_FOREACH_REVERSE(var, head, headname, field) \ for((var) = TAILQ_LAST(head, headname); \ (var) != TAILQ_END(head); \ (var) = TAILQ_PREV(var, headname, field)) +#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \ + for ((var) = TAILQ_LAST(head, headname); \ + (var) != TAILQ_END(head) && \ + ((tvar) = TAILQ_PREV(var, headname, field), 1); \ + (var) = (tvar)) + /* * Tail queue functions. */ @@ -526,11 +555,23 @@ struct { \ (var) != CIRCLEQ_END(head); \ (var) = CIRCLEQ_NEXT(var, field)) +#define CIRCLEQ_FOREACH_SAFE(var, head, field, tvar) \ + for ((var) = CIRCLEQ_FIRST(head); \ + (var) != CIRCLEQ_END(head) && \ + ((tvar) = CIRCLEQ_NEXT(var, field), 1); \ + (var) = (tvar)) + #define CIRCLEQ_FOREACH_REVERSE(var, head, field) \ for((var) = CIRCLEQ_LAST(head); \ (var) != CIRCLEQ_END(head); \ (var) = CIRCLEQ_PREV(var, field)) +#define CIRCLEQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \ + for ((var) = CIRCLEQ_LAST(head, headname); \ + (var) != CIRCLEQ_END(head) && \ + ((tvar) = CIRCLEQ_PREV(var, headname, field), 1); \ + (var) = (tvar)) + /* * Circular queue functions. */ diff --git a/openbsd-compat/sys-tree.h b/openbsd-compat/sys-tree.h index d4949b5..7f7546e 100644 --- a/openbsd-compat/sys-tree.h +++ b/openbsd-compat/sys-tree.h @@ -1,4 +1,4 @@ -/* $OpenBSD: tree.h,v 1.10 2007/10/29 23:49:41 djm Exp $ */ +/* $OpenBSD: tree.h,v 1.13 2011/07/09 00:19:45 pirofti Exp $ */ /* * Copyright 2002 Niels Provos * All rights reserved. @@ -26,6 +26,11 @@ /* OPENBSD ORIGINAL: sys/sys/tree.h */ +#include "config.h" +#ifdef NO_ATTRIBUTE_ON_RETURN_TYPE +# define __attribute__(x) +#endif + #ifndef _SYS_TREE_H_ #define _SYS_TREE_H_ @@ -331,7 +336,7 @@ struct { \ } while (0) #ifndef RB_AUGMENT -#define RB_AUGMENT(x) +#define RB_AUGMENT(x) do {} while (0) #endif #define RB_ROTATE_LEFT(head, elm, tmp, field) do { \ @@ -375,21 +380,31 @@ struct { \ } while (0) /* Generates prototypes and inline functions */ -#define RB_PROTOTYPE(name, type, field, cmp) \ -void name##_RB_INSERT_COLOR(struct name *, struct type *); \ -void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\ -struct type *name##_RB_REMOVE(struct name *, struct type *); \ -struct type *name##_RB_INSERT(struct name *, struct type *); \ -struct type *name##_RB_FIND(struct name *, struct type *); \ -struct type *name##_RB_NEXT(struct type *); \ -struct type *name##_RB_MINMAX(struct name *, int); - +#define RB_PROTOTYPE(name, type, field, cmp) \ + RB_PROTOTYPE_INTERNAL(name, type, field, cmp,) +#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \ + RB_PROTOTYPE_INTERNAL(name, type, field, cmp, __attribute__((__unused__)) static) +#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \ +attr void name##_RB_INSERT_COLOR(struct name *, struct type *); \ +attr void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\ +attr struct type *name##_RB_REMOVE(struct name *, struct type *); \ +attr struct type *name##_RB_INSERT(struct name *, struct type *); \ +attr struct type *name##_RB_FIND(struct name *, struct type *); \ +attr struct type *name##_RB_NFIND(struct name *, struct type *); \ +attr struct type *name##_RB_NEXT(struct type *); \ +attr struct type *name##_RB_PREV(struct type *); \ +attr struct type *name##_RB_MINMAX(struct name *, int); \ + \ /* Main rb operation. * Moves node close to the key of elm to top */ -#define RB_GENERATE(name, type, field, cmp) \ -void \ +#define RB_GENERATE(name, type, field, cmp) \ + RB_GENERATE_INTERNAL(name, type, field, cmp,) +#define RB_GENERATE_STATIC(name, type, field, cmp) \ + RB_GENERATE_INTERNAL(name, type, field, cmp, __attribute__((__unused__)) static) +#define RB_GENERATE_INTERNAL(name, type, field, cmp, attr) \ +attr void \ name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \ { \ struct type *parent, *gparent, *tmp; \ @@ -433,7 +448,7 @@ name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \ RB_COLOR(head->rbh_root, field) = RB_BLACK; \ } \ \ -void \ +attr void \ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) \ { \ struct type *tmp; \ @@ -509,7 +524,7 @@ name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, struct type *elm) RB_COLOR(elm, field) = RB_BLACK; \ } \ \ -struct type * \ +attr struct type * \ name##_RB_REMOVE(struct name *head, struct type *elm) \ { \ struct type *child, *parent, *old = elm; \ @@ -577,7 +592,7 @@ color: \ } \ \ /* Inserts a node into the RB tree */ \ -struct type * \ +attr struct type * \ name##_RB_INSERT(struct name *head, struct type *elm) \ { \ struct type *tmp; \ @@ -608,7 +623,7 @@ name##_RB_INSERT(struct name *head, struct type *elm) \ } \ \ /* Finds the node with the same key as elm */ \ -struct type * \ +attr struct type * \ name##_RB_FIND(struct name *head, struct type *elm) \ { \ struct type *tmp = RB_ROOT(head); \ @@ -625,7 +640,29 @@ name##_RB_FIND(struct name *head, struct type *elm) \ return (NULL); \ } \ \ -struct type * \ +/* Finds the first node greater than or equal to the search key */ \ +attr struct type * \ +name##_RB_NFIND(struct name *head, struct type *elm) \ +{ \ + struct type *tmp = RB_ROOT(head); \ + struct type *res = NULL; \ + int comp; \ + while (tmp) { \ + comp = cmp(elm, tmp); \ + if (comp < 0) { \ + res = tmp; \ + tmp = RB_LEFT(tmp, field); \ + } \ + else if (comp > 0) \ + tmp = RB_RIGHT(tmp, field); \ + else \ + return (tmp); \ + } \ + return (res); \ +} \ + \ +/* ARGSUSED */ \ +attr struct type * \ name##_RB_NEXT(struct type *elm) \ { \ if (RB_RIGHT(elm, field)) { \ @@ -646,7 +683,29 @@ name##_RB_NEXT(struct type *elm) \ return (elm); \ } \ \ -struct type * \ +/* ARGSUSED */ \ +attr struct type * \ +name##_RB_PREV(struct type *elm) \ +{ \ + if (RB_LEFT(elm, field)) { \ + elm = RB_LEFT(elm, field); \ + while (RB_RIGHT(elm, field)) \ + elm = RB_RIGHT(elm, field); \ + } else { \ + if (RB_PARENT(elm, field) && \ + (elm == RB_RIGHT(RB_PARENT(elm, field), field))) \ + elm = RB_PARENT(elm, field); \ + else { \ + while (RB_PARENT(elm, field) && \ + (elm == RB_LEFT(RB_PARENT(elm, field), field)))\ + elm = RB_PARENT(elm, field); \ + elm = RB_PARENT(elm, field); \ + } \ + } \ + return (elm); \ +} \ + \ +attr struct type * \ name##_RB_MINMAX(struct name *head, int val) \ { \ struct type *tmp = RB_ROOT(head); \ @@ -667,7 +726,9 @@ name##_RB_MINMAX(struct name *head, int val) \ #define RB_INSERT(name, x, y) name##_RB_INSERT(x, y) #define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y) #define RB_FIND(name, x, y) name##_RB_FIND(x, y) +#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y) #define RB_NEXT(name, x, y) name##_RB_NEXT(y) +#define RB_PREV(name, x, y) name##_RB_PREV(y) #define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF) #define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF) @@ -676,4 +737,19 @@ name##_RB_MINMAX(struct name *head, int val) \ (x) != NULL; \ (x) = name##_RB_NEXT(x)) +#define RB_FOREACH_SAFE(x, name, head, y) \ + for ((x) = RB_MIN(name, head); \ + ((x) != NULL) && ((y) = name##_RB_NEXT(x), 1); \ + (x) = (y)) + +#define RB_FOREACH_REVERSE(x, name, head) \ + for ((x) = RB_MAX(name, head); \ + (x) != NULL; \ + (x) = name##_RB_PREV(x)) + +#define RB_FOREACH_REVERSE_SAFE(x, name, head, y) \ + for ((x) = RB_MAX(name, head); \ + ((x) != NULL) && ((y) = name##_RB_PREV(x), 1); \ + (x) = (y)) + #endif /* _SYS_TREE_H_ */ diff --git a/openbsd-compat/vis.c b/openbsd-compat/vis.c index 3a087b3..f6f5665 100644 --- a/openbsd-compat/vis.c +++ b/openbsd-compat/vis.c @@ -31,7 +31,7 @@ /* OPENBSD ORIGINAL: lib/libc/gen/vis.c */ #include "includes.h" -#if !defined(HAVE_STRNVIS) +#if !defined(HAVE_STRNVIS) || defined(BROKEN_STRNVIS) #include #include diff --git a/openbsd-compat/vis.h b/openbsd-compat/vis.h index 3898a9e..d1286c9 100644 --- a/openbsd-compat/vis.h +++ b/openbsd-compat/vis.h @@ -35,7 +35,7 @@ /* OPENBSD ORIGINAL: include/vis.h */ #include "includes.h" -#if !defined(HAVE_STRNVIS) +#if !defined(HAVE_STRNVIS) || defined(BROKEN_STRNVIS) #ifndef _VIS_H_ #define _VIS_H_ @@ -92,4 +92,4 @@ ssize_t strnunvis(char *, const char *, size_t) #endif /* !_VIS_H_ */ -#endif /* !HAVE_STRNVIS */ +#endif /* !HAVE_STRNVIS || BROKEN_STRNVIS */ diff --git a/openbsd-compat/xcrypt.c b/openbsd-compat/xcrypt.c index 6291e28..8577cbd 100644 --- a/openbsd-compat/xcrypt.c +++ b/openbsd-compat/xcrypt.c @@ -55,7 +55,12 @@ # if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) # include "md5crypt.h" -# endif +# endif + +# if defined(WITH_OPENSSL) && !defined(HAVE_CRYPT) && defined(HAVE_DES_CRYPT) +# include +# define crypt DES_crypt +# endif char * xcrypt(const char *password, const char *salt) diff --git a/packet.c b/packet.c index d0cc1ca..78e8fa5 100644 --- a/packet.c +++ b/packet.c @@ -1,4 +1,4 @@ -/* $OpenBSD: packet.c,v 1.173 2011/05/06 21:14:05 djm Exp $ */ +/* $OpenBSD: packet.c,v 1.214 2015/08/20 22:32:42 deraadt Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -39,9 +39,9 @@ #include "includes.h" +#include /* MIN roundup */ #include #include "openbsd-compat/sys-queue.h" -#include #include #ifdef HAVE_SYS_TIME_H # include @@ -57,27 +57,35 @@ #include #include #include +#include #include +#include + +#include + +#include "buffer.h" /* typedefs XXX */ +#include "key.h" /* typedefs XXX */ #include "xmalloc.h" -#include "buffer.h" -#include "packet.h" #include "crc32.h" -#include "compress.h" #include "deattack.h" -#include "channels.h" #include "compat.h" #include "ssh1.h" #include "ssh2.h" #include "cipher.h" -#include "key.h" +#include "sshkey.h" #include "kex.h" +#include "digest.h" #include "mac.h" #include "log.h" #include "canohost.h" #include "misc.h" +#include "channels.h" #include "ssh.h" +#include "packet.h" #include "roaming.h" +#include "ssherr.h" +#include "sshbuf.h" #ifdef PACKET_DEBUG #define DBG(x) x @@ -97,7 +105,7 @@ struct packet_state { struct packet { TAILQ_ENTRY(packet) next; u_char type; - Buffer payload; + struct sshbuf *payload; }; struct session_state { @@ -114,26 +122,33 @@ struct session_state { u_int remote_protocol_flags; /* Encryption context for receiving data. Only used for decryption. */ - CipherContext receive_context; + struct sshcipher_ctx receive_context; /* Encryption context for sending data. Only used for encryption. */ - CipherContext send_context; + struct sshcipher_ctx send_context; /* Buffer for raw input data from the socket. */ - Buffer input; + struct sshbuf *input; /* Buffer for raw output data going to the socket. */ - Buffer output; + struct sshbuf *output; /* Buffer for the partial outgoing packet being constructed. */ - Buffer outgoing_packet; + struct sshbuf *outgoing_packet; /* Buffer for the incoming packet currently being processed. */ - Buffer incoming_packet; + struct sshbuf *incoming_packet; /* Scratch buffer for packet compression/decompression. */ - Buffer compression_buffer; - int compression_buffer_ready; + struct sshbuf *compression_buffer; + + /* Incoming/outgoing compression dictionaries */ + z_stream compression_in_stream; + z_stream compression_out_stream; + int compression_in_started; + int compression_out_started; + int compression_in_failures; + int compression_out_failures; /* * Flag indicating whether packet compression/decompression is @@ -162,12 +177,17 @@ struct session_state { int packet_timeout_ms; /* Session key information for Encryption and MAC */ - Newkeys *newkeys[MODE_MAX]; + struct newkeys *newkeys[MODE_MAX]; struct packet_state p_read, p_send; + /* Volume-based rekeying */ u_int64_t max_blocks_in, max_blocks_out; u_int32_t rekey_limit; + /* Time-based rekeying */ + u_int32_t rekey_interval; /* how often in seconds */ + time_t rekey_time; /* time of last rekeying */ + /* Session key for protocol v1 */ u_char ssh1_key[SSH_SESSION_KEY_LENGTH]; u_int ssh1_keylen; @@ -177,7 +197,7 @@ struct session_state { /* XXX discard incoming data after MAC error */ u_int packet_discard; - Mac *packet_discard_mac; + struct sshmac *packet_discard_mac; /* Used in packet_read_poll2() */ u_int packlen; @@ -191,119 +211,178 @@ struct session_state { /* Used in packet_set_maxsize */ int set_maxsize_called; + /* One-off warning about weak ciphers */ + int cipher_warning_done; + + /* SSH1 CRC compensation attack detector */ + struct deattack_ctx deattack; + TAILQ_HEAD(, packet) outgoing; }; -static struct session_state *active_state, *backup_state; - -static struct session_state * -alloc_session_state(void) +struct ssh * +ssh_alloc_session_state(void) { - struct session_state *s = xcalloc(1, sizeof(*s)); + struct ssh *ssh = NULL; + struct session_state *state = NULL; - s->connection_in = -1; - s->connection_out = -1; - s->max_packet_size = 32768; - s->packet_timeout_ms = -1; - return s; + if ((ssh = calloc(1, sizeof(*ssh))) == NULL || + (state = calloc(1, sizeof(*state))) == NULL || + (state->input = sshbuf_new()) == NULL || + (state->output = sshbuf_new()) == NULL || + (state->outgoing_packet = sshbuf_new()) == NULL || + (state->incoming_packet = sshbuf_new()) == NULL) + goto fail; + TAILQ_INIT(&state->outgoing); + TAILQ_INIT(&ssh->private_keys); + TAILQ_INIT(&ssh->public_keys); + state->connection_in = -1; + state->connection_out = -1; + state->max_packet_size = 32768; + state->packet_timeout_ms = -1; + state->p_send.packets = state->p_read.packets = 0; + state->initialized = 1; + /* + * ssh_packet_send2() needs to queue packets until + * we've done the initial key exchange. + */ + state->rekeying = 1; + ssh->state = state; + return ssh; + fail: + if (state) { + sshbuf_free(state->input); + sshbuf_free(state->output); + sshbuf_free(state->incoming_packet); + sshbuf_free(state->outgoing_packet); + free(state); + } + free(ssh); + return NULL; } /* * Sets the descriptors used for communication. Disables encryption until * packet_set_encryption_key is called. */ -void -packet_set_connection(int fd_in, int fd_out) +struct ssh * +ssh_packet_set_connection(struct ssh *ssh, int fd_in, int fd_out) { - Cipher *none = cipher_by_name("none"); + struct session_state *state; + const struct sshcipher *none = cipher_by_name("none"); + int r; - if (none == NULL) - fatal("packet_set_connection: cannot load cipher 'none'"); - if (active_state == NULL) - active_state = alloc_session_state(); - active_state->connection_in = fd_in; - active_state->connection_out = fd_out; - cipher_init(&active_state->send_context, none, (const u_char *)"", - 0, NULL, 0, CIPHER_ENCRYPT); - cipher_init(&active_state->receive_context, none, (const u_char *)"", - 0, NULL, 0, CIPHER_DECRYPT); - active_state->newkeys[MODE_IN] = active_state->newkeys[MODE_OUT] = NULL; - if (!active_state->initialized) { - active_state->initialized = 1; - buffer_init(&active_state->input); - buffer_init(&active_state->output); - buffer_init(&active_state->outgoing_packet); - buffer_init(&active_state->incoming_packet); - TAILQ_INIT(&active_state->outgoing); - active_state->p_send.packets = active_state->p_read.packets = 0; + if (none == NULL) { + error("%s: cannot load cipher 'none'", __func__); + return NULL; } + if (ssh == NULL) + ssh = ssh_alloc_session_state(); + if (ssh == NULL) { + error("%s: cound not allocate state", __func__); + return NULL; + } + state = ssh->state; + state->connection_in = fd_in; + state->connection_out = fd_out; + if ((r = cipher_init(&state->send_context, none, + (const u_char *)"", 0, NULL, 0, CIPHER_ENCRYPT)) != 0 || + (r = cipher_init(&state->receive_context, none, + (const u_char *)"", 0, NULL, 0, CIPHER_DECRYPT)) != 0) { + error("%s: cipher_init failed: %s", __func__, ssh_err(r)); + free(ssh); + return NULL; + } + state->newkeys[MODE_IN] = state->newkeys[MODE_OUT] = NULL; + deattack_init(&state->deattack); + /* + * Cache the IP address of the remote connection for use in error + * messages that might be generated after the connection has closed. + */ + (void)ssh_remote_ipaddr(ssh); + return ssh; } void -packet_set_timeout(int timeout, int count) +ssh_packet_set_timeout(struct ssh *ssh, int timeout, int count) { - if (timeout == 0 || count == 0) { - active_state->packet_timeout_ms = -1; + struct session_state *state = ssh->state; + + if (timeout <= 0 || count <= 0) { + state->packet_timeout_ms = -1; return; } if ((INT_MAX / 1000) / count < timeout) - active_state->packet_timeout_ms = INT_MAX; + state->packet_timeout_ms = INT_MAX; else - active_state->packet_timeout_ms = timeout * count * 1000; + state->packet_timeout_ms = timeout * count * 1000; } -static void -packet_stop_discard(void) +int +ssh_packet_stop_discard(struct ssh *ssh) { - if (active_state->packet_discard_mac) { + struct session_state *state = ssh->state; + int r; + + if (state->packet_discard_mac) { char buf[1024]; - + memset(buf, 'a', sizeof(buf)); - while (buffer_len(&active_state->incoming_packet) < + while (sshbuf_len(state->incoming_packet) < PACKET_MAX_SIZE) - buffer_append(&active_state->incoming_packet, buf, - sizeof(buf)); - (void) mac_compute(active_state->packet_discard_mac, - active_state->p_read.seqnr, - buffer_ptr(&active_state->incoming_packet), - PACKET_MAX_SIZE); + if ((r = sshbuf_put(state->incoming_packet, buf, + sizeof(buf))) != 0) + return r; + (void) mac_compute(state->packet_discard_mac, + state->p_read.seqnr, + sshbuf_ptr(state->incoming_packet), PACKET_MAX_SIZE, + NULL, 0); } - logit("Finished discarding for %.200s", get_remote_ipaddr()); - cleanup_exit(255); + logit("Finished discarding for %.200s", ssh_remote_ipaddr(ssh)); + return SSH_ERR_MAC_INVALID; } -static void -packet_start_discard(Enc *enc, Mac *mac, u_int packet_length, u_int discard) +static int +ssh_packet_start_discard(struct ssh *ssh, struct sshenc *enc, + struct sshmac *mac, u_int packet_length, u_int discard) { - if (enc == NULL || !cipher_is_cbc(enc->cipher)) - packet_disconnect("Packet corrupt"); + struct session_state *state = ssh->state; + int r; + + if (enc == NULL || !cipher_is_cbc(enc->cipher) || (mac && mac->etm)) { + if ((r = sshpkt_disconnect(ssh, "Packet corrupt")) != 0) + return r; + return SSH_ERR_MAC_INVALID; + } if (packet_length != PACKET_MAX_SIZE && mac && mac->enabled) - active_state->packet_discard_mac = mac; - if (buffer_len(&active_state->input) >= discard) - packet_stop_discard(); - active_state->packet_discard = discard - - buffer_len(&active_state->input); + state->packet_discard_mac = mac; + if (sshbuf_len(state->input) >= discard && + (r = ssh_packet_stop_discard(ssh)) != 0) + return r; + state->packet_discard = discard - sshbuf_len(state->input); + return 0; } /* Returns 1 if remote host is connected via socket, 0 if not. */ int -packet_connection_is_on_socket(void) +ssh_packet_connection_is_on_socket(struct ssh *ssh) { + struct session_state *state = ssh->state; struct sockaddr_storage from, to; socklen_t fromlen, tolen; /* filedescriptors in and out are the same, so it's a socket */ - if (active_state->connection_in == active_state->connection_out) + if (state->connection_in == state->connection_out) return 1; fromlen = sizeof(from); memset(&from, 0, sizeof(from)); - if (getpeername(active_state->connection_in, (struct sockaddr *)&from, + if (getpeername(state->connection_in, (struct sockaddr *)&from, &fromlen) < 0) return 0; tolen = sizeof(to); memset(&to, 0, sizeof(to)); - if (getpeername(active_state->connection_out, (struct sockaddr *)&to, + if (getpeername(state->connection_out, (struct sockaddr *)&to, &tolen) < 0) return 0; if (fromlen != tolen || memcmp(&from, &to, fromlen) != 0) @@ -313,125 +392,27 @@ packet_connection_is_on_socket(void) return 1; } -/* - * Exports an IV from the CipherContext required to export the key - * state back from the unprivileged child to the privileged parent - * process. - */ - void -packet_get_keyiv(int mode, u_char *iv, u_int len) +ssh_packet_get_bytes(struct ssh *ssh, u_int64_t *ibytes, u_int64_t *obytes) { - CipherContext *cc; - - if (mode == MODE_OUT) - cc = &active_state->send_context; - else - cc = &active_state->receive_context; - - cipher_get_keyiv(cc, iv, len); + if (ibytes) + *ibytes = ssh->state->p_read.bytes; + if (obytes) + *obytes = ssh->state->p_send.bytes; } int -packet_get_keycontext(int mode, u_char *dat) -{ - CipherContext *cc; - - if (mode == MODE_OUT) - cc = &active_state->send_context; - else - cc = &active_state->receive_context; - - return (cipher_get_keycontext(cc, dat)); -} - -void -packet_set_keycontext(int mode, u_char *dat) -{ - CipherContext *cc; - - if (mode == MODE_OUT) - cc = &active_state->send_context; - else - cc = &active_state->receive_context; - - cipher_set_keycontext(cc, dat); -} - -int -packet_get_keyiv_len(int mode) -{ - CipherContext *cc; - - if (mode == MODE_OUT) - cc = &active_state->send_context; - else - cc = &active_state->receive_context; - - return (cipher_get_keyiv_len(cc)); -} - -void -packet_set_iv(int mode, u_char *dat) -{ - CipherContext *cc; - - if (mode == MODE_OUT) - cc = &active_state->send_context; - else - cc = &active_state->receive_context; - - cipher_set_keyiv(cc, dat); -} - -int -packet_get_ssh1_cipher(void) -{ - return (cipher_get_number(active_state->receive_context.cipher)); -} - -void -packet_get_state(int mode, u_int32_t *seqnr, u_int64_t *blocks, - u_int32_t *packets, u_int64_t *bytes) -{ - struct packet_state *state; - - state = (mode == MODE_IN) ? - &active_state->p_read : &active_state->p_send; - if (seqnr) - *seqnr = state->seqnr; - if (blocks) - *blocks = state->blocks; - if (packets) - *packets = state->packets; - if (bytes) - *bytes = state->bytes; -} - -void -packet_set_state(int mode, u_int32_t seqnr, u_int64_t blocks, u_int32_t packets, - u_int64_t bytes) -{ - struct packet_state *state; - - state = (mode == MODE_IN) ? - &active_state->p_read : &active_state->p_send; - state->seqnr = seqnr; - state->blocks = blocks; - state->packets = packets; - state->bytes = bytes; -} - -static int -packet_connection_af(void) +ssh_packet_connection_af(struct ssh *ssh) { struct sockaddr_storage to; socklen_t tolen = sizeof(to); memset(&to, 0, sizeof(to)); - if (getsockname(active_state->connection_out, (struct sockaddr *)&to, + if (getsockname(ssh->state->connection_out, (struct sockaddr *)&to, &tolen) < 0) return 0; + if (to.ss_family == AF_INET) + return 1; #ifdef IPV4_IN_IPV6 if (to.ss_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&to)->sin6_addr)) @@ -443,72 +424,125 @@ packet_connection_af(void) /* Sets the connection into non-blocking mode. */ void -packet_set_nonblocking(void) +ssh_packet_set_nonblocking(struct ssh *ssh) { /* Set the socket into non-blocking mode. */ - set_nonblock(active_state->connection_in); + set_nonblock(ssh->state->connection_in); - if (active_state->connection_out != active_state->connection_in) - set_nonblock(active_state->connection_out); + if (ssh->state->connection_out != ssh->state->connection_in) + set_nonblock(ssh->state->connection_out); } /* Returns the socket used for reading. */ int -packet_get_connection_in(void) +ssh_packet_get_connection_in(struct ssh *ssh) { - return active_state->connection_in; + return ssh->state->connection_in; } /* Returns the descriptor used for writing. */ int -packet_get_connection_out(void) +ssh_packet_get_connection_out(struct ssh *ssh) { - return active_state->connection_out; + return ssh->state->connection_out; +} + +/* + * Returns the IP-address of the remote host as a string. The returned + * string must not be freed. + */ + +const char * +ssh_remote_ipaddr(struct ssh *ssh) +{ + /* Check whether we have cached the ipaddr. */ + if (ssh->remote_ipaddr == NULL) + ssh->remote_ipaddr = ssh_packet_connection_is_on_socket(ssh) ? + get_peer_ipaddr(ssh->state->connection_in) : + strdup("UNKNOWN"); + if (ssh->remote_ipaddr == NULL) + return "UNKNOWN"; + return ssh->remote_ipaddr; } /* Closes the connection and clears and frees internal data structures. */ void -packet_close(void) +ssh_packet_close(struct ssh *ssh) { - if (!active_state->initialized) + struct session_state *state = ssh->state; + int r; + u_int mode; + + if (!state->initialized) return; - active_state->initialized = 0; - if (active_state->connection_in == active_state->connection_out) { - shutdown(active_state->connection_out, SHUT_RDWR); - close(active_state->connection_out); + state->initialized = 0; + if (state->connection_in == state->connection_out) { + shutdown(state->connection_out, SHUT_RDWR); + close(state->connection_out); } else { - close(active_state->connection_in); - close(active_state->connection_out); + close(state->connection_in); + close(state->connection_out); } - buffer_free(&active_state->input); - buffer_free(&active_state->output); - buffer_free(&active_state->outgoing_packet); - buffer_free(&active_state->incoming_packet); - if (active_state->compression_buffer_ready) { - buffer_free(&active_state->compression_buffer); - buffer_compress_uninit(); + sshbuf_free(state->input); + sshbuf_free(state->output); + sshbuf_free(state->outgoing_packet); + sshbuf_free(state->incoming_packet); + for (mode = 0; mode < MODE_MAX; mode++) + kex_free_newkeys(state->newkeys[mode]); + if (state->compression_buffer) { + sshbuf_free(state->compression_buffer); + if (state->compression_out_started) { + z_streamp stream = &state->compression_out_stream; + debug("compress outgoing: " + "raw data %llu, compressed %llu, factor %.2f", + (unsigned long long)stream->total_in, + (unsigned long long)stream->total_out, + stream->total_in == 0 ? 0.0 : + (double) stream->total_out / stream->total_in); + if (state->compression_out_failures == 0) + deflateEnd(stream); + } + if (state->compression_in_started) { + z_streamp stream = &state->compression_out_stream; + debug("compress incoming: " + "raw data %llu, compressed %llu, factor %.2f", + (unsigned long long)stream->total_out, + (unsigned long long)stream->total_in, + stream->total_out == 0 ? 0.0 : + (double) stream->total_in / stream->total_out); + if (state->compression_in_failures == 0) + inflateEnd(stream); + } } - cipher_cleanup(&active_state->send_context); - cipher_cleanup(&active_state->receive_context); + if ((r = cipher_cleanup(&state->send_context)) != 0) + error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r)); + if ((r = cipher_cleanup(&state->receive_context)) != 0) + error("%s: cipher_cleanup failed: %s", __func__, ssh_err(r)); + if (ssh->remote_ipaddr) { + free(ssh->remote_ipaddr); + ssh->remote_ipaddr = NULL; + } + free(ssh->state); + ssh->state = NULL; } /* Sets remote side protocol flags. */ void -packet_set_protocol_flags(u_int protocol_flags) +ssh_packet_set_protocol_flags(struct ssh *ssh, u_int protocol_flags) { - active_state->remote_protocol_flags = protocol_flags; + ssh->state->remote_protocol_flags = protocol_flags; } /* Returns the remote protocol flags set earlier by the above function. */ u_int -packet_get_protocol_flags(void) +ssh_packet_get_protocol_flags(struct ssh *ssh) { - return active_state->remote_protocol_flags; + return ssh->state->remote_protocol_flags; } /* @@ -516,24 +550,239 @@ packet_get_protocol_flags(void) * Level is compression level 1 (fastest) - 9 (slow, best) as in gzip. */ -static void -packet_init_compression(void) +static int +ssh_packet_init_compression(struct ssh *ssh) { - if (active_state->compression_buffer_ready == 1) - return; - active_state->compression_buffer_ready = 1; - buffer_init(&active_state->compression_buffer); + if (!ssh->state->compression_buffer && + ((ssh->state->compression_buffer = sshbuf_new()) == NULL)) + return SSH_ERR_ALLOC_FAIL; + return 0; +} + +static int +start_compression_out(struct ssh *ssh, int level) +{ + if (level < 1 || level > 9) + return SSH_ERR_INVALID_ARGUMENT; + debug("Enabling compression at level %d.", level); + if (ssh->state->compression_out_started == 1) + deflateEnd(&ssh->state->compression_out_stream); + switch (deflateInit(&ssh->state->compression_out_stream, level)) { + case Z_OK: + ssh->state->compression_out_started = 1; + break; + case Z_MEM_ERROR: + return SSH_ERR_ALLOC_FAIL; + default: + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +static int +start_compression_in(struct ssh *ssh) +{ + if (ssh->state->compression_in_started == 1) + inflateEnd(&ssh->state->compression_in_stream); + switch (inflateInit(&ssh->state->compression_in_stream)) { + case Z_OK: + ssh->state->compression_in_started = 1; + break; + case Z_MEM_ERROR: + return SSH_ERR_ALLOC_FAIL; + default: + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +int +ssh_packet_start_compression(struct ssh *ssh, int level) +{ + int r; + + if (ssh->state->packet_compression && !compat20) + return SSH_ERR_INTERNAL_ERROR; + ssh->state->packet_compression = 1; + if ((r = ssh_packet_init_compression(ssh)) != 0 || + (r = start_compression_in(ssh)) != 0 || + (r = start_compression_out(ssh, level)) != 0) + return r; + return 0; +} + +/* XXX remove need for separate compression buffer */ +static int +compress_buffer(struct ssh *ssh, struct sshbuf *in, struct sshbuf *out) +{ + u_char buf[4096]; + int r, status; + + if (ssh->state->compression_out_started != 1) + return SSH_ERR_INTERNAL_ERROR; + + /* This case is not handled below. */ + if (sshbuf_len(in) == 0) + return 0; + + /* Input is the contents of the input buffer. */ + if ((ssh->state->compression_out_stream.next_in = + sshbuf_mutable_ptr(in)) == NULL) + return SSH_ERR_INTERNAL_ERROR; + ssh->state->compression_out_stream.avail_in = sshbuf_len(in); + + /* Loop compressing until deflate() returns with avail_out != 0. */ + do { + /* Set up fixed-size output buffer. */ + ssh->state->compression_out_stream.next_out = buf; + ssh->state->compression_out_stream.avail_out = sizeof(buf); + + /* Compress as much data into the buffer as possible. */ + status = deflate(&ssh->state->compression_out_stream, + Z_PARTIAL_FLUSH); + switch (status) { + case Z_MEM_ERROR: + return SSH_ERR_ALLOC_FAIL; + case Z_OK: + /* Append compressed data to output_buffer. */ + if ((r = sshbuf_put(out, buf, sizeof(buf) - + ssh->state->compression_out_stream.avail_out)) != 0) + return r; + break; + case Z_STREAM_ERROR: + default: + ssh->state->compression_out_failures++; + return SSH_ERR_INVALID_FORMAT; + } + } while (ssh->state->compression_out_stream.avail_out == 0); + return 0; +} + +static int +uncompress_buffer(struct ssh *ssh, struct sshbuf *in, struct sshbuf *out) +{ + u_char buf[4096]; + int r, status; + + if (ssh->state->compression_in_started != 1) + return SSH_ERR_INTERNAL_ERROR; + + if ((ssh->state->compression_in_stream.next_in = + sshbuf_mutable_ptr(in)) == NULL) + return SSH_ERR_INTERNAL_ERROR; + ssh->state->compression_in_stream.avail_in = sshbuf_len(in); + + for (;;) { + /* Set up fixed-size output buffer. */ + ssh->state->compression_in_stream.next_out = buf; + ssh->state->compression_in_stream.avail_out = sizeof(buf); + + status = inflate(&ssh->state->compression_in_stream, + Z_PARTIAL_FLUSH); + switch (status) { + case Z_OK: + if ((r = sshbuf_put(out, buf, sizeof(buf) - + ssh->state->compression_in_stream.avail_out)) != 0) + return r; + break; + case Z_BUF_ERROR: + /* + * Comments in zlib.h say that we should keep calling + * inflate() until we get an error. This appears to + * be the error that we get. + */ + return 0; + case Z_DATA_ERROR: + return SSH_ERR_INVALID_FORMAT; + case Z_MEM_ERROR: + return SSH_ERR_ALLOC_FAIL; + case Z_STREAM_ERROR: + default: + ssh->state->compression_in_failures++; + return SSH_ERR_INTERNAL_ERROR; + } + } + /* NOTREACHED */ +} + +/* Serialise compression state into a blob for privsep */ +static int +ssh_packet_get_compress_state(struct sshbuf *m, struct ssh *ssh) +{ + struct session_state *state = ssh->state; + struct sshbuf *b; + int r; + + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (state->compression_in_started) { + if ((r = sshbuf_put_string(b, &state->compression_in_stream, + sizeof(state->compression_in_stream))) != 0) + goto out; + } else if ((r = sshbuf_put_string(b, NULL, 0)) != 0) + goto out; + if (state->compression_out_started) { + if ((r = sshbuf_put_string(b, &state->compression_out_stream, + sizeof(state->compression_out_stream))) != 0) + goto out; + } else if ((r = sshbuf_put_string(b, NULL, 0)) != 0) + goto out; + r = sshbuf_put_stringb(m, b); + out: + sshbuf_free(b); + return r; +} + +/* Deserialise compression state from a blob for privsep */ +static int +ssh_packet_set_compress_state(struct ssh *ssh, struct sshbuf *m) +{ + struct session_state *state = ssh->state; + struct sshbuf *b = NULL; + int r; + const u_char *inblob, *outblob; + size_t inl, outl; + + if ((r = sshbuf_froms(m, &b)) != 0) + goto out; + if ((r = sshbuf_get_string_direct(b, &inblob, &inl)) != 0 || + (r = sshbuf_get_string_direct(b, &outblob, &outl)) != 0) + goto out; + if (inl == 0) + state->compression_in_started = 0; + else if (inl != sizeof(state->compression_in_stream)) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } else { + state->compression_in_started = 1; + memcpy(&state->compression_in_stream, inblob, inl); + } + if (outl == 0) + state->compression_out_started = 0; + else if (outl != sizeof(state->compression_out_stream)) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } else { + state->compression_out_started = 1; + memcpy(&state->compression_out_stream, outblob, outl); + } + r = 0; + out: + sshbuf_free(b); + return r; } void -packet_start_compression(int level) +ssh_packet_set_compress_hooks(struct ssh *ssh, void *ctx, + void *(*allocfunc)(void *, u_int, u_int), + void (*freefunc)(void *, void *)) { - if (active_state->packet_compression && !compat20) - fatal("Compression already enabled."); - active_state->packet_compression = 1; - packet_init_compression(); - buffer_compress_init_send(level); - buffer_compress_init_recv(); + ssh->state->compression_out_stream.zalloc = (alloc_func)allocfunc; + ssh->state->compression_out_stream.zfree = (free_func)freefunc; + ssh->state->compression_out_stream.opaque = ctx; + ssh->state->compression_in_stream.zalloc = (alloc_func)allocfunc; + ssh->state->compression_in_stream.zfree = (free_func)freefunc; + ssh->state->compression_in_stream.opaque = ctx; } /* @@ -543,251 +792,212 @@ packet_start_compression(int level) */ void -packet_set_encryption_key(const u_char *key, u_int keylen, int number) +ssh_packet_set_encryption_key(struct ssh *ssh, const u_char *key, u_int keylen, int number) { - Cipher *cipher = cipher_by_number(number); +#ifndef WITH_SSH1 + fatal("no SSH protocol 1 support"); +#else /* WITH_SSH1 */ + struct session_state *state = ssh->state; + const struct sshcipher *cipher = cipher_by_number(number); + int r; + const char *wmsg; if (cipher == NULL) - fatal("packet_set_encryption_key: unknown cipher number %d", number); + fatal("%s: unknown cipher number %d", __func__, number); if (keylen < 20) - fatal("packet_set_encryption_key: keylen too small: %d", keylen); + fatal("%s: keylen too small: %d", __func__, keylen); if (keylen > SSH_SESSION_KEY_LENGTH) - fatal("packet_set_encryption_key: keylen too big: %d", keylen); - memcpy(active_state->ssh1_key, key, keylen); - active_state->ssh1_keylen = keylen; - cipher_init(&active_state->send_context, cipher, key, keylen, NULL, - 0, CIPHER_ENCRYPT); - cipher_init(&active_state->receive_context, cipher, key, keylen, NULL, - 0, CIPHER_DECRYPT); + fatal("%s: keylen too big: %d", __func__, keylen); + memcpy(state->ssh1_key, key, keylen); + state->ssh1_keylen = keylen; + if ((r = cipher_init(&state->send_context, cipher, key, keylen, + NULL, 0, CIPHER_ENCRYPT)) != 0 || + (r = cipher_init(&state->receive_context, cipher, key, keylen, + NULL, 0, CIPHER_DECRYPT) != 0)) + fatal("%s: cipher_init failed: %s", __func__, ssh_err(r)); + if (!state->cipher_warning_done && + ((wmsg = cipher_warning_message(&state->send_context)) != NULL || + (wmsg = cipher_warning_message(&state->send_context)) != NULL)) { + error("Warning: %s", wmsg); + state->cipher_warning_done = 1; + } +#endif /* WITH_SSH1 */ } -u_int -packet_get_encryption_key(u_char *key) -{ - if (key == NULL) - return (active_state->ssh1_keylen); - memcpy(key, active_state->ssh1_key, active_state->ssh1_keylen); - return (active_state->ssh1_keylen); -} - -/* Start constructing a packet to send. */ -void -packet_start(u_char type) -{ - u_char buf[9]; - int len; - - DBG(debug("packet_start[%d]", type)); - len = compat20 ? 6 : 9; - memset(buf, 0, len - 1); - buf[len - 1] = type; - buffer_clear(&active_state->outgoing_packet); - buffer_append(&active_state->outgoing_packet, buf, len); -} - -/* Append payload. */ -void -packet_put_char(int value) -{ - char ch = value; - - buffer_append(&active_state->outgoing_packet, &ch, 1); -} - -void -packet_put_int(u_int value) -{ - buffer_put_int(&active_state->outgoing_packet, value); -} - -void -packet_put_int64(u_int64_t value) -{ - buffer_put_int64(&active_state->outgoing_packet, value); -} - -void -packet_put_string(const void *buf, u_int len) -{ - buffer_put_string(&active_state->outgoing_packet, buf, len); -} - -void -packet_put_cstring(const char *str) -{ - buffer_put_cstring(&active_state->outgoing_packet, str); -} - -void -packet_put_raw(const void *buf, u_int len) -{ - buffer_append(&active_state->outgoing_packet, buf, len); -} - -void -packet_put_bignum(BIGNUM * value) -{ - buffer_put_bignum(&active_state->outgoing_packet, value); -} - -void -packet_put_bignum2(BIGNUM * value) -{ - buffer_put_bignum2(&active_state->outgoing_packet, value); -} - -#ifdef OPENSSL_HAS_ECC -void -packet_put_ecpoint(const EC_GROUP *curve, const EC_POINT *point) -{ - buffer_put_ecpoint(&active_state->outgoing_packet, curve, point); -} -#endif - /* * Finalizes and sends the packet. If the encryption key has been set, * encrypts the packet before sending. */ -static void -packet_send1(void) +int +ssh_packet_send1(struct ssh *ssh) { + struct session_state *state = ssh->state; u_char buf[8], *cp; - int i, padding, len; + int r, padding, len; u_int checksum; - u_int32_t rnd = 0; /* * If using packet compression, compress the payload of the outgoing * packet. */ - if (active_state->packet_compression) { - buffer_clear(&active_state->compression_buffer); + if (state->packet_compression) { + sshbuf_reset(state->compression_buffer); /* Skip padding. */ - buffer_consume(&active_state->outgoing_packet, 8); + if ((r = sshbuf_consume(state->outgoing_packet, 8)) != 0) + goto out; /* padding */ - buffer_append(&active_state->compression_buffer, - "\0\0\0\0\0\0\0\0", 8); - buffer_compress(&active_state->outgoing_packet, - &active_state->compression_buffer); - buffer_clear(&active_state->outgoing_packet); - buffer_append(&active_state->outgoing_packet, - buffer_ptr(&active_state->compression_buffer), - buffer_len(&active_state->compression_buffer)); + if ((r = sshbuf_put(state->compression_buffer, + "\0\0\0\0\0\0\0\0", 8)) != 0) + goto out; + if ((r = compress_buffer(ssh, state->outgoing_packet, + state->compression_buffer)) != 0) + goto out; + sshbuf_reset(state->outgoing_packet); + if ((r = sshbuf_putb(state->outgoing_packet, + state->compression_buffer)) != 0) + goto out; } /* Compute packet length without padding (add checksum, remove padding). */ - len = buffer_len(&active_state->outgoing_packet) + 4 - 8; + len = sshbuf_len(state->outgoing_packet) + 4 - 8; /* Insert padding. Initialized to zero in packet_start1() */ padding = 8 - len % 8; - if (!active_state->send_context.plaintext) { - cp = buffer_ptr(&active_state->outgoing_packet); - for (i = 0; i < padding; i++) { - if (i % 4 == 0) - rnd = arc4random(); - cp[7 - i] = rnd & 0xff; - rnd >>= 8; + if (!state->send_context.plaintext) { + cp = sshbuf_mutable_ptr(state->outgoing_packet); + if (cp == NULL) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; } + arc4random_buf(cp + 8 - padding, padding); } - buffer_consume(&active_state->outgoing_packet, 8 - padding); + if ((r = sshbuf_consume(state->outgoing_packet, 8 - padding)) != 0) + goto out; /* Add check bytes. */ - checksum = ssh_crc32(buffer_ptr(&active_state->outgoing_packet), - buffer_len(&active_state->outgoing_packet)); - put_u32(buf, checksum); - buffer_append(&active_state->outgoing_packet, buf, 4); + checksum = ssh_crc32(sshbuf_ptr(state->outgoing_packet), + sshbuf_len(state->outgoing_packet)); + POKE_U32(buf, checksum); + if ((r = sshbuf_put(state->outgoing_packet, buf, 4)) != 0) + goto out; #ifdef PACKET_DEBUG fprintf(stderr, "packet_send plain: "); - buffer_dump(&active_state->outgoing_packet); + sshbuf_dump(state->outgoing_packet, stderr); #endif /* Append to output. */ - put_u32(buf, len); - buffer_append(&active_state->output, buf, 4); - cp = buffer_append_space(&active_state->output, - buffer_len(&active_state->outgoing_packet)); - cipher_crypt(&active_state->send_context, cp, - buffer_ptr(&active_state->outgoing_packet), - buffer_len(&active_state->outgoing_packet)); + POKE_U32(buf, len); + if ((r = sshbuf_put(state->output, buf, 4)) != 0) + goto out; + if ((r = sshbuf_reserve(state->output, + sshbuf_len(state->outgoing_packet), &cp)) != 0) + goto out; + if ((r = cipher_crypt(&state->send_context, 0, cp, + sshbuf_ptr(state->outgoing_packet), + sshbuf_len(state->outgoing_packet), 0, 0)) != 0) + goto out; #ifdef PACKET_DEBUG fprintf(stderr, "encrypted: "); - buffer_dump(&active_state->output); + sshbuf_dump(state->output, stderr); #endif - active_state->p_send.packets++; - active_state->p_send.bytes += len + - buffer_len(&active_state->outgoing_packet); - buffer_clear(&active_state->outgoing_packet); + state->p_send.packets++; + state->p_send.bytes += len + + sshbuf_len(state->outgoing_packet); + sshbuf_reset(state->outgoing_packet); /* * Note that the packet is now only buffered in output. It won't be - * actually sent until packet_write_wait or packet_write_poll is - * called. + * actually sent until ssh_packet_write_wait or ssh_packet_write_poll + * is called. */ + r = 0; + out: + return r; } -void -set_newkeys(int mode) +int +ssh_set_newkeys(struct ssh *ssh, int mode) { - Enc *enc; - Mac *mac; - Comp *comp; - CipherContext *cc; + struct session_state *state = ssh->state; + struct sshenc *enc; + struct sshmac *mac; + struct sshcomp *comp; + struct sshcipher_ctx *cc; u_int64_t *max_blocks; - int crypt_type; + const char *wmsg; + int r, crypt_type; debug2("set_newkeys: mode %d", mode); if (mode == MODE_OUT) { - cc = &active_state->send_context; + cc = &state->send_context; crypt_type = CIPHER_ENCRYPT; - active_state->p_send.packets = active_state->p_send.blocks = 0; - max_blocks = &active_state->max_blocks_out; + state->p_send.packets = state->p_send.blocks = 0; + max_blocks = &state->max_blocks_out; } else { - cc = &active_state->receive_context; + cc = &state->receive_context; crypt_type = CIPHER_DECRYPT; - active_state->p_read.packets = active_state->p_read.blocks = 0; - max_blocks = &active_state->max_blocks_in; + state->p_read.packets = state->p_read.blocks = 0; + max_blocks = &state->max_blocks_in; } - if (active_state->newkeys[mode] != NULL) { + if (state->newkeys[mode] != NULL) { debug("set_newkeys: rekeying"); - cipher_cleanup(cc); - enc = &active_state->newkeys[mode]->enc; - mac = &active_state->newkeys[mode]->mac; - comp = &active_state->newkeys[mode]->comp; + if ((r = cipher_cleanup(cc)) != 0) + return r; + enc = &state->newkeys[mode]->enc; + mac = &state->newkeys[mode]->mac; + comp = &state->newkeys[mode]->comp; mac_clear(mac); - xfree(enc->name); - xfree(enc->iv); - xfree(enc->key); - xfree(mac->name); - xfree(mac->key); - xfree(comp->name); - xfree(active_state->newkeys[mode]); + explicit_bzero(enc->iv, enc->iv_len); + explicit_bzero(enc->key, enc->key_len); + explicit_bzero(mac->key, mac->key_len); + free(enc->name); + free(enc->iv); + free(enc->key); + free(mac->name); + free(mac->key); + free(comp->name); + free(state->newkeys[mode]); } - active_state->newkeys[mode] = kex_get_newkeys(mode); - if (active_state->newkeys[mode] == NULL) - fatal("newkeys: no keys for mode %d", mode); - enc = &active_state->newkeys[mode]->enc; - mac = &active_state->newkeys[mode]->mac; - comp = &active_state->newkeys[mode]->comp; - if (mac_init(mac) == 0) - mac->enabled = 1; + /* move newkeys from kex to state */ + if ((state->newkeys[mode] = ssh->kex->newkeys[mode]) == NULL) + return SSH_ERR_INTERNAL_ERROR; + ssh->kex->newkeys[mode] = NULL; + enc = &state->newkeys[mode]->enc; + mac = &state->newkeys[mode]->mac; + comp = &state->newkeys[mode]->comp; + if (cipher_authlen(enc->cipher) == 0) { + if ((r = mac_init(mac)) != 0) + return r; + } + mac->enabled = 1; DBG(debug("cipher_init_context: %d", mode)); - cipher_init(cc, enc->cipher, enc->key, enc->key_len, - enc->iv, enc->block_size, crypt_type); + if ((r = cipher_init(cc, enc->cipher, enc->key, enc->key_len, + enc->iv, enc->iv_len, crypt_type)) != 0) + return r; + if (!state->cipher_warning_done && + (wmsg = cipher_warning_message(cc)) != NULL) { + error("Warning: %s", wmsg); + state->cipher_warning_done = 1; + } /* Deleting the keys does not gain extra security */ - /* memset(enc->iv, 0, enc->block_size); - memset(enc->key, 0, enc->key_len); - memset(mac->key, 0, mac->key_len); */ + /* explicit_bzero(enc->iv, enc->block_size); + explicit_bzero(enc->key, enc->key_len); + explicit_bzero(mac->key, mac->key_len); */ if ((comp->type == COMP_ZLIB || (comp->type == COMP_DELAYED && - active_state->after_authentication)) && comp->enabled == 0) { - packet_init_compression(); - if (mode == MODE_OUT) - buffer_compress_init_send(6); - else - buffer_compress_init_recv(); + state->after_authentication)) && comp->enabled == 0) { + if ((r = ssh_packet_init_compression(ssh)) < 0) + return r; + if (mode == MODE_OUT) { + if ((r = start_compression_out(ssh, 6)) != 0) + return r; + } else { + if ((r = start_compression_in(ssh)) != 0) + return r; + } comp->enabled = 1; } /* @@ -798,9 +1008,10 @@ set_newkeys(int mode) *max_blocks = (u_int64_t)1 << (enc->block_size*2); else *max_blocks = ((u_int64_t)1 << 30) / enc->block_size; - if (active_state->rekey_limit) + if (state->rekey_limit) *max_blocks = MIN(*max_blocks, - active_state->rekey_limit / enc->block_size); + state->rekey_limit / enc->block_size); + return 0; } /* @@ -808,211 +1019,242 @@ set_newkeys(int mode) * This happens on the server side after a SSH2_MSG_USERAUTH_SUCCESS is sent, * and on the client side after a SSH2_MSG_USERAUTH_SUCCESS is received. */ -static void -packet_enable_delayed_compress(void) +static int +ssh_packet_enable_delayed_compress(struct ssh *ssh) { - Comp *comp = NULL; - int mode; + struct session_state *state = ssh->state; + struct sshcomp *comp = NULL; + int r, mode; /* * Remember that we are past the authentication step, so rekeying * with COMP_DELAYED will turn on compression immediately. */ - active_state->after_authentication = 1; + state->after_authentication = 1; for (mode = 0; mode < MODE_MAX; mode++) { /* protocol error: USERAUTH_SUCCESS received before NEWKEYS */ - if (active_state->newkeys[mode] == NULL) + if (state->newkeys[mode] == NULL) continue; - comp = &active_state->newkeys[mode]->comp; + comp = &state->newkeys[mode]->comp; if (comp && !comp->enabled && comp->type == COMP_DELAYED) { - packet_init_compression(); - if (mode == MODE_OUT) - buffer_compress_init_send(6); - else - buffer_compress_init_recv(); + if ((r = ssh_packet_init_compression(ssh)) != 0) + return r; + if (mode == MODE_OUT) { + if ((r = start_compression_out(ssh, 6)) != 0) + return r; + } else { + if ((r = start_compression_in(ssh)) != 0) + return r; + } comp->enabled = 1; } } + return 0; } /* * Finalize packet in SSH2 format (compress, mac, encrypt, enqueue) */ -static void -packet_send2_wrapped(void) +int +ssh_packet_send2_wrapped(struct ssh *ssh) { - u_char type, *cp, *macbuf = NULL; - u_char padlen, pad; - u_int packet_length = 0; - u_int i, len; - u_int32_t rnd = 0; - Enc *enc = NULL; - Mac *mac = NULL; - Comp *comp = NULL; - int block_size; + struct session_state *state = ssh->state; + u_char type, *cp, macbuf[SSH_DIGEST_MAX_LENGTH]; + u_char padlen, pad = 0; + u_int authlen = 0, aadlen = 0; + u_int len; + struct sshenc *enc = NULL; + struct sshmac *mac = NULL; + struct sshcomp *comp = NULL; + int r, block_size; - if (active_state->newkeys[MODE_OUT] != NULL) { - enc = &active_state->newkeys[MODE_OUT]->enc; - mac = &active_state->newkeys[MODE_OUT]->mac; - comp = &active_state->newkeys[MODE_OUT]->comp; + if (state->newkeys[MODE_OUT] != NULL) { + enc = &state->newkeys[MODE_OUT]->enc; + mac = &state->newkeys[MODE_OUT]->mac; + comp = &state->newkeys[MODE_OUT]->comp; + /* disable mac for authenticated encryption */ + if ((authlen = cipher_authlen(enc->cipher)) != 0) + mac = NULL; } block_size = enc ? enc->block_size : 8; + aadlen = (mac && mac->enabled && mac->etm) || authlen ? 4 : 0; - cp = buffer_ptr(&active_state->outgoing_packet); - type = cp[5]; + type = (sshbuf_ptr(state->outgoing_packet))[5]; #ifdef PACKET_DEBUG fprintf(stderr, "plain: "); - buffer_dump(&active_state->outgoing_packet); + sshbuf_dump(state->outgoing_packet, stderr); #endif if (comp && comp->enabled) { - len = buffer_len(&active_state->outgoing_packet); + len = sshbuf_len(state->outgoing_packet); /* skip header, compress only payload */ - buffer_consume(&active_state->outgoing_packet, 5); - buffer_clear(&active_state->compression_buffer); - buffer_compress(&active_state->outgoing_packet, - &active_state->compression_buffer); - buffer_clear(&active_state->outgoing_packet); - buffer_append(&active_state->outgoing_packet, "\0\0\0\0\0", 5); - buffer_append(&active_state->outgoing_packet, - buffer_ptr(&active_state->compression_buffer), - buffer_len(&active_state->compression_buffer)); - DBG(debug("compression: raw %d compressed %d", len, - buffer_len(&active_state->outgoing_packet))); + if ((r = sshbuf_consume(state->outgoing_packet, 5)) != 0) + goto out; + sshbuf_reset(state->compression_buffer); + if ((r = compress_buffer(ssh, state->outgoing_packet, + state->compression_buffer)) != 0) + goto out; + sshbuf_reset(state->outgoing_packet); + if ((r = sshbuf_put(state->outgoing_packet, + "\0\0\0\0\0", 5)) != 0 || + (r = sshbuf_putb(state->outgoing_packet, + state->compression_buffer)) != 0) + goto out; + DBG(debug("compression: raw %d compressed %zd", len, + sshbuf_len(state->outgoing_packet))); } /* sizeof (packet_len + pad_len + payload) */ - len = buffer_len(&active_state->outgoing_packet); + len = sshbuf_len(state->outgoing_packet); /* * calc size of padding, alloc space, get random data, * minimum padding is 4 bytes */ + len -= aadlen; /* packet length is not encrypted for EtM modes */ padlen = block_size - (len % block_size); if (padlen < 4) padlen += block_size; - if (active_state->extra_pad) { + if (state->extra_pad) { /* will wrap if extra_pad+padlen > 255 */ - active_state->extra_pad = - roundup(active_state->extra_pad, block_size); - pad = active_state->extra_pad - - ((len + padlen) % active_state->extra_pad); - debug3("packet_send2: adding %d (len %d padlen %d extra_pad %d)", - pad, len, padlen, active_state->extra_pad); + state->extra_pad = + roundup(state->extra_pad, block_size); + pad = state->extra_pad - + ((len + padlen) % state->extra_pad); + DBG(debug3("%s: adding %d (len %d padlen %d extra_pad %d)", + __func__, pad, len, padlen, state->extra_pad)); padlen += pad; - active_state->extra_pad = 0; + state->extra_pad = 0; } - cp = buffer_append_space(&active_state->outgoing_packet, padlen); - if (enc && !active_state->send_context.plaintext) { + if ((r = sshbuf_reserve(state->outgoing_packet, padlen, &cp)) != 0) + goto out; + if (enc && !state->send_context.plaintext) { /* random padding */ - for (i = 0; i < padlen; i++) { - if (i % 4 == 0) - rnd = arc4random(); - cp[i] = rnd & 0xff; - rnd >>= 8; - } + arc4random_buf(cp, padlen); } else { /* clear padding */ - memset(cp, 0, padlen); + explicit_bzero(cp, padlen); + } + /* sizeof (packet_len + pad_len + payload + padding) */ + len = sshbuf_len(state->outgoing_packet); + cp = sshbuf_mutable_ptr(state->outgoing_packet); + if (cp == NULL) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; } /* packet_length includes payload, padding and padding length field */ - packet_length = buffer_len(&active_state->outgoing_packet) - 4; - cp = buffer_ptr(&active_state->outgoing_packet); - put_u32(cp, packet_length); + POKE_U32(cp, len - 4); cp[4] = padlen; - DBG(debug("send: len %d (includes padlen %d)", packet_length+4, padlen)); + DBG(debug("send: len %d (includes padlen %d, aadlen %d)", + len, padlen, aadlen)); /* compute MAC over seqnr and packet(length fields, payload, padding) */ - if (mac && mac->enabled) { - macbuf = mac_compute(mac, active_state->p_send.seqnr, - buffer_ptr(&active_state->outgoing_packet), - buffer_len(&active_state->outgoing_packet)); - DBG(debug("done calc MAC out #%d", active_state->p_send.seqnr)); + if (mac && mac->enabled && !mac->etm) { + if ((r = mac_compute(mac, state->p_send.seqnr, + sshbuf_ptr(state->outgoing_packet), len, + macbuf, sizeof(macbuf))) != 0) + goto out; + DBG(debug("done calc MAC out #%d", state->p_send.seqnr)); } /* encrypt packet and append to output buffer. */ - cp = buffer_append_space(&active_state->output, - buffer_len(&active_state->outgoing_packet)); - cipher_crypt(&active_state->send_context, cp, - buffer_ptr(&active_state->outgoing_packet), - buffer_len(&active_state->outgoing_packet)); + if ((r = sshbuf_reserve(state->output, + sshbuf_len(state->outgoing_packet) + authlen, &cp)) != 0) + goto out; + if ((r = cipher_crypt(&state->send_context, state->p_send.seqnr, cp, + sshbuf_ptr(state->outgoing_packet), + len - aadlen, aadlen, authlen)) != 0) + goto out; /* append unencrypted MAC */ - if (mac && mac->enabled) - buffer_append(&active_state->output, macbuf, mac->mac_len); + if (mac && mac->enabled) { + if (mac->etm) { + /* EtM: compute mac over aadlen + cipher text */ + if ((r = mac_compute(mac, state->p_send.seqnr, + cp, len, macbuf, sizeof(macbuf))) != 0) + goto out; + DBG(debug("done calc MAC(EtM) out #%d", + state->p_send.seqnr)); + } + if ((r = sshbuf_put(state->output, macbuf, mac->mac_len)) != 0) + goto out; + } #ifdef PACKET_DEBUG fprintf(stderr, "encrypted: "); - buffer_dump(&active_state->output); + sshbuf_dump(state->output, stderr); #endif /* increment sequence number for outgoing packets */ - if (++active_state->p_send.seqnr == 0) + if (++state->p_send.seqnr == 0) logit("outgoing seqnr wraps around"); - if (++active_state->p_send.packets == 0) - if (!(datafellows & SSH_BUG_NOREKEY)) - fatal("XXX too many packets with same key"); - active_state->p_send.blocks += (packet_length + 4) / block_size; - active_state->p_send.bytes += packet_length + 4; - buffer_clear(&active_state->outgoing_packet); + if (++state->p_send.packets == 0) + if (!(ssh->compat & SSH_BUG_NOREKEY)) + return SSH_ERR_NEED_REKEY; + state->p_send.blocks += len / block_size; + state->p_send.bytes += len; + sshbuf_reset(state->outgoing_packet); if (type == SSH2_MSG_NEWKEYS) - set_newkeys(MODE_OUT); - else if (type == SSH2_MSG_USERAUTH_SUCCESS && active_state->server_side) - packet_enable_delayed_compress(); + r = ssh_set_newkeys(ssh, MODE_OUT); + else if (type == SSH2_MSG_USERAUTH_SUCCESS && state->server_side) + r = ssh_packet_enable_delayed_compress(ssh); + else + r = 0; + out: + return r; } -static void -packet_send2(void) +int +ssh_packet_send2(struct ssh *ssh) { + struct session_state *state = ssh->state; struct packet *p; - u_char type, *cp; + u_char type; + int r; - cp = buffer_ptr(&active_state->outgoing_packet); - type = cp[5]; + type = sshbuf_ptr(state->outgoing_packet)[5]; /* during rekeying we can only send key exchange messages */ - if (active_state->rekeying) { - if (!((type >= SSH2_MSG_TRANSPORT_MIN) && - (type <= SSH2_MSG_TRANSPORT_MAX))) { + if (state->rekeying) { + if ((type < SSH2_MSG_TRANSPORT_MIN) || + (type > SSH2_MSG_TRANSPORT_MAX) || + (type == SSH2_MSG_SERVICE_REQUEST) || + (type == SSH2_MSG_SERVICE_ACCEPT)) { debug("enqueue packet: %u", type); - p = xmalloc(sizeof(*p)); + p = calloc(1, sizeof(*p)); + if (p == NULL) + return SSH_ERR_ALLOC_FAIL; p->type = type; - memcpy(&p->payload, &active_state->outgoing_packet, - sizeof(Buffer)); - buffer_init(&active_state->outgoing_packet); - TAILQ_INSERT_TAIL(&active_state->outgoing, p, next); - return; + p->payload = state->outgoing_packet; + TAILQ_INSERT_TAIL(&state->outgoing, p, next); + state->outgoing_packet = sshbuf_new(); + if (state->outgoing_packet == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; } } /* rekeying starts with sending KEXINIT */ if (type == SSH2_MSG_KEXINIT) - active_state->rekeying = 1; + state->rekeying = 1; - packet_send2_wrapped(); + if ((r = ssh_packet_send2_wrapped(ssh)) != 0) + return r; /* after a NEWKEYS message we can send the complete queue */ if (type == SSH2_MSG_NEWKEYS) { - active_state->rekeying = 0; - while ((p = TAILQ_FIRST(&active_state->outgoing))) { + state->rekeying = 0; + state->rekey_time = monotime(); + while ((p = TAILQ_FIRST(&state->outgoing))) { type = p->type; debug("dequeue packet: %u", type); - buffer_free(&active_state->outgoing_packet); - memcpy(&active_state->outgoing_packet, &p->payload, - sizeof(Buffer)); - TAILQ_REMOVE(&active_state->outgoing, p, next); - xfree(p); - packet_send2_wrapped(); + sshbuf_free(state->outgoing_packet); + state->outgoing_packet = p->payload; + TAILQ_REMOVE(&state->outgoing, p, next); + free(p); + if ((r = ssh_packet_send2_wrapped(ssh)) != 0) + return r; } } -} - -void -packet_send(void) -{ - if (compat20) - packet_send2(); - else - packet_send1(); - DBG(debug("packet_send done")); + return 0; } /* @@ -1022,104 +1264,121 @@ packet_send(void) */ int -packet_read_seqnr(u_int32_t *seqnr_p) +ssh_packet_read_seqnr(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p) { - int type, len, ret, ms_remain, cont; + struct session_state *state = ssh->state; + int len, r, ms_remain, cont; fd_set *setp; char buf[8192]; struct timeval timeout, start, *timeoutp = NULL; DBG(debug("packet_read()")); - #ifndef WIN32_FIXME - setp = (fd_set *)xcalloc(howmany(active_state->connection_in + 1, + setp = calloc(howmany(state->connection_in + 1, NFDBITS), sizeof(fd_mask)); #else setp = xmalloc(sizeof(fd_set)); FD_ZERO(setp); #endif - /* Since we are blocking, ensure that all written packets have been sent. */ - packet_write_wait(); + if (setp == NULL) + return SSH_ERR_ALLOC_FAIL; + + /* + * Since we are blocking, ensure that all written packets have + * been sent. + */ + if ((r = ssh_packet_write_wait(ssh)) != 0) + goto out; /* Stay in the loop until we have received a complete packet. */ for (;;) { /* Try to read a packet from the buffer. */ - type = packet_read_poll_seqnr(seqnr_p); + r = ssh_packet_read_poll_seqnr(ssh, typep, seqnr_p); + if (r != 0) + break; if (!compat20 && ( - type == SSH_SMSG_SUCCESS - || type == SSH_SMSG_FAILURE - || type == SSH_CMSG_EOF - || type == SSH_CMSG_EXIT_CONFIRMATION)) - packet_check_eom(); + *typep == SSH_SMSG_SUCCESS + || *typep == SSH_SMSG_FAILURE + || *typep == SSH_CMSG_EOF + || *typep == SSH_CMSG_EXIT_CONFIRMATION)) + if ((r = sshpkt_get_end(ssh)) != 0) + break; /* If we got a packet, return it. */ - if (type != SSH_MSG_NONE) { - xfree(setp); - return type; - } + if (*typep != SSH_MSG_NONE) + break; /* * Otherwise, wait for some data to arrive, add it to the * buffer, and try again. */ #ifndef WIN32_FIXME - memset(setp, 0, howmany(active_state->connection_in + 1, + memset(setp, 0, howmany(state->connection_in + 1, NFDBITS) * sizeof(fd_mask)); #else FD_ZERO(setp); #endif - FD_SET(active_state->connection_in, setp); + + FD_SET(state->connection_in, setp); - if (active_state->packet_timeout_ms > 0) { - ms_remain = active_state->packet_timeout_ms; + if (state->packet_timeout_ms > 0) { + ms_remain = state->packet_timeout_ms; timeoutp = &timeout; } /* Wait for some data to arrive. */ for (;;) { - if (active_state->packet_timeout_ms != -1) { + if (state->packet_timeout_ms != -1) { ms_to_timeval(&timeout, ms_remain); gettimeofday(&start, NULL); } - if ((ret = select(active_state->connection_in + 1, setp, + if ((r = select(state->connection_in + 1, setp, NULL, NULL, timeoutp)) >= 0) break; if (errno != EAGAIN && errno != EINTR && errno != EWOULDBLOCK) break; - if (active_state->packet_timeout_ms == -1) + if (state->packet_timeout_ms == -1) continue; ms_subtract_diff(&start, &ms_remain); if (ms_remain <= 0) { - ret = 0; + r = 0; break; } } - if (ret == 0) { - logit("Connection to %.200s timed out while " - "waiting to read", get_remote_ipaddr()); - cleanup_exit(255); - } + if (r == 0) + return SSH_ERR_CONN_TIMEOUT; /* Read data from the socket. */ do { cont = 0; - len = roaming_read(active_state->connection_in, buf, + len = roaming_read(state->connection_in, buf, sizeof(buf), &cont); } while (len == 0 && cont); if (len == 0) { - logit("Connection closed by %.200s", get_remote_ipaddr()); - cleanup_exit(255); + r = SSH_ERR_CONN_CLOSED; + goto out; } - if (len < 0) - fatal("Read from socket failed: %.100s", strerror(errno)); + if (len < 0) { + r = SSH_ERR_SYSTEM_ERROR; + goto out; + } + /* Append it to the buffer. */ - packet_process_incoming(buf, len); + if ((r = ssh_packet_process_incoming(ssh, buf, len)) != 0) + goto out; } - /* NOTREACHED */ + out: + free(setp); + return r; } int -packet_read(void) +ssh_packet_read(struct ssh *ssh) { - return packet_read_seqnr(NULL); + u_char type; + int r; + + if ((r = ssh_packet_read_seqnr(ssh, &type, NULL)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + return type; } /* @@ -1127,15 +1386,22 @@ packet_read(void) * that given, and gives a fatal error and exits if there is a mismatch. */ -void -packet_read_expect(int expected_type) +int +ssh_packet_read_expect(struct ssh *ssh, u_int expected_type) { - int type; + int r; + u_char type; - type = packet_read(); - if (type != expected_type) - packet_disconnect("Protocol error: expected packet type %d, got %d", - expected_type, type); + if ((r = ssh_packet_read_seqnr(ssh, &type, NULL)) != 0) + return r; + if (type != expected_type) { + if ((r = sshpkt_disconnect(ssh, + "Protocol error: expected packet type %d, got %d", + expected_type, type)) != 0) + return r; + return SSH_ERR_PROTOCOL_ERROR; + } + return 0; } /* Checks if a full packet is available in the data received so far via @@ -1147,430 +1413,473 @@ packet_read_expect(int expected_type) * to higher levels. */ -static int -packet_read_poll1(void) +int +ssh_packet_read_poll1(struct ssh *ssh, u_char *typep) { + struct session_state *state = ssh->state; u_int len, padded_len; - u_char *cp, type; + const char *emsg; + const u_char *cp; + u_char *p; u_int checksum, stored_checksum; + int r; + + *typep = SSH_MSG_NONE; /* Check if input size is less than minimum packet size. */ - if (buffer_len(&active_state->input) < 4 + 8) - return SSH_MSG_NONE; + if (sshbuf_len(state->input) < 4 + 8) + return 0; /* Get length of incoming packet. */ - cp = buffer_ptr(&active_state->input); - len = get_u32(cp); - if (len < 1 + 2 + 2 || len > 256 * 1024) - packet_disconnect("Bad packet length %u.", len); + len = PEEK_U32(sshbuf_ptr(state->input)); + if (len < 1 + 2 + 2 || len > 256 * 1024) { + if ((r = sshpkt_disconnect(ssh, "Bad packet length %u", + len)) != 0) + return r; + return SSH_ERR_CONN_CORRUPT; + } padded_len = (len + 8) & ~7; /* Check if the packet has been entirely received. */ - if (buffer_len(&active_state->input) < 4 + padded_len) - return SSH_MSG_NONE; + if (sshbuf_len(state->input) < 4 + padded_len) + return 0; /* The entire packet is in buffer. */ /* Consume packet length. */ - buffer_consume(&active_state->input, 4); + if ((r = sshbuf_consume(state->input, 4)) != 0) + goto out; /* * Cryptographic attack detector for ssh * (C)1998 CORE-SDI, Buenos Aires Argentina * Ariel Futoransky(futo@core-sdi.com) */ - if (!active_state->receive_context.plaintext) { - switch (detect_attack(buffer_ptr(&active_state->input), - padded_len)) { + if (!state->receive_context.plaintext) { + emsg = NULL; + switch (detect_attack(&state->deattack, + sshbuf_ptr(state->input), padded_len)) { + case DEATTACK_OK: + break; case DEATTACK_DETECTED: - packet_disconnect("crc32 compensation attack: " - "network attack detected"); + emsg = "crc32 compensation attack detected"; + break; case DEATTACK_DOS_DETECTED: - packet_disconnect("deattack denial of " - "service detected"); + emsg = "deattack denial of service detected"; + break; + default: + emsg = "deattack error"; + break; + } + if (emsg != NULL) { + error("%s", emsg); + if ((r = sshpkt_disconnect(ssh, "%s", emsg)) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_CONN_CORRUPT; } } /* Decrypt data to incoming_packet. */ - buffer_clear(&active_state->incoming_packet); - cp = buffer_append_space(&active_state->incoming_packet, padded_len); - cipher_crypt(&active_state->receive_context, cp, - buffer_ptr(&active_state->input), padded_len); + sshbuf_reset(state->incoming_packet); + if ((r = sshbuf_reserve(state->incoming_packet, padded_len, &p)) != 0) + goto out; + if ((r = cipher_crypt(&state->receive_context, 0, p, + sshbuf_ptr(state->input), padded_len, 0, 0)) != 0) + goto out; - buffer_consume(&active_state->input, padded_len); + if ((r = sshbuf_consume(state->input, padded_len)) != 0) + goto out; #ifdef PACKET_DEBUG fprintf(stderr, "read_poll plain: "); - buffer_dump(&active_state->incoming_packet); + sshbuf_dump(state->incoming_packet, stderr); #endif /* Compute packet checksum. */ - checksum = ssh_crc32(buffer_ptr(&active_state->incoming_packet), - buffer_len(&active_state->incoming_packet) - 4); + checksum = ssh_crc32(sshbuf_ptr(state->incoming_packet), + sshbuf_len(state->incoming_packet) - 4); /* Skip padding. */ - buffer_consume(&active_state->incoming_packet, 8 - len % 8); + if ((r = sshbuf_consume(state->incoming_packet, 8 - len % 8)) != 0) + goto out; /* Test check bytes. */ - if (len != buffer_len(&active_state->incoming_packet)) - packet_disconnect("packet_read_poll1: len %d != buffer_len %d.", - len, buffer_len(&active_state->incoming_packet)); - - cp = (u_char *)buffer_ptr(&active_state->incoming_packet) + len - 4; - stored_checksum = get_u32(cp); - if (checksum != stored_checksum) - packet_disconnect("Corrupted check bytes on input."); - buffer_consume_end(&active_state->incoming_packet, 4); - - if (active_state->packet_compression) { - buffer_clear(&active_state->compression_buffer); - buffer_uncompress(&active_state->incoming_packet, - &active_state->compression_buffer); - buffer_clear(&active_state->incoming_packet); - buffer_append(&active_state->incoming_packet, - buffer_ptr(&active_state->compression_buffer), - buffer_len(&active_state->compression_buffer)); + if (len != sshbuf_len(state->incoming_packet)) { + error("%s: len %d != sshbuf_len %zd", __func__, + len, sshbuf_len(state->incoming_packet)); + if ((r = sshpkt_disconnect(ssh, "invalid packet length")) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_CONN_CORRUPT; } - active_state->p_read.packets++; - active_state->p_read.bytes += padded_len + 4; - type = buffer_get_char(&active_state->incoming_packet); - if (type < SSH_MSG_MIN || type > SSH_MSG_MAX) - packet_disconnect("Invalid ssh1 packet type: %d", type); - return type; + + cp = sshbuf_ptr(state->incoming_packet) + len - 4; + stored_checksum = PEEK_U32(cp); + if (checksum != stored_checksum) { + error("Corrupted check bytes on input"); + if ((r = sshpkt_disconnect(ssh, "connection corrupted")) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_CONN_CORRUPT; + } + if ((r = sshbuf_consume_end(state->incoming_packet, 4)) < 0) + goto out; + + if (state->packet_compression) { + sshbuf_reset(state->compression_buffer); + if ((r = uncompress_buffer(ssh, state->incoming_packet, + state->compression_buffer)) != 0) + goto out; + sshbuf_reset(state->incoming_packet); + if ((r = sshbuf_putb(state->incoming_packet, + state->compression_buffer)) != 0) + goto out; + } + state->p_read.packets++; + state->p_read.bytes += padded_len + 4; + if ((r = sshbuf_get_u8(state->incoming_packet, typep)) != 0) + goto out; + if (*typep < SSH_MSG_MIN || *typep > SSH_MSG_MAX) { + error("Invalid ssh1 packet type: %d", *typep); + if ((r = sshpkt_disconnect(ssh, "invalid packet type")) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_PROTOCOL_ERROR; + } + r = 0; + out: + return r; } -static int -packet_read_poll2(u_int32_t *seqnr_p) +int +ssh_packet_read_poll2(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p) { + struct session_state *state = ssh->state; u_int padlen, need; - u_char *macbuf, *cp, type; - u_int maclen, block_size; - Enc *enc = NULL; - Mac *mac = NULL; - Comp *comp = NULL; + u_char *cp, macbuf[SSH_DIGEST_MAX_LENGTH]; + u_int maclen, aadlen = 0, authlen = 0, block_size; + struct sshenc *enc = NULL; + struct sshmac *mac = NULL; + struct sshcomp *comp = NULL; + int r; - if (active_state->packet_discard) - return SSH_MSG_NONE; + *typep = SSH_MSG_NONE; - if (active_state->newkeys[MODE_IN] != NULL) { - enc = &active_state->newkeys[MODE_IN]->enc; - mac = &active_state->newkeys[MODE_IN]->mac; - comp = &active_state->newkeys[MODE_IN]->comp; + if (state->packet_discard) + return 0; + + if (state->newkeys[MODE_IN] != NULL) { + enc = &state->newkeys[MODE_IN]->enc; + mac = &state->newkeys[MODE_IN]->mac; + comp = &state->newkeys[MODE_IN]->comp; + /* disable mac for authenticated encryption */ + if ((authlen = cipher_authlen(enc->cipher)) != 0) + mac = NULL; } maclen = mac && mac->enabled ? mac->mac_len : 0; block_size = enc ? enc->block_size : 8; + aadlen = (mac && mac->enabled && mac->etm) || authlen ? 4 : 0; - if (active_state->packlen == 0) { + if (aadlen && state->packlen == 0) { + if (cipher_get_length(&state->receive_context, + &state->packlen, state->p_read.seqnr, + sshbuf_ptr(state->input), sshbuf_len(state->input)) != 0) + return 0; + if (state->packlen < 1 + 4 || + state->packlen > PACKET_MAX_SIZE) { +#ifdef PACKET_DEBUG + sshbuf_dump(state->input, stderr); +#endif + logit("Bad packet length %u.", state->packlen); + if ((r = sshpkt_disconnect(ssh, "Packet corrupt")) != 0) + return r; + } + sshbuf_reset(state->incoming_packet); + } else if (state->packlen == 0) { /* * check if input size is less than the cipher block size, * decrypt first block and extract length of incoming packet */ - if (buffer_len(&active_state->input) < block_size) - return SSH_MSG_NONE; - buffer_clear(&active_state->incoming_packet); - cp = buffer_append_space(&active_state->incoming_packet, - block_size); - cipher_crypt(&active_state->receive_context, cp, - buffer_ptr(&active_state->input), block_size); - cp = buffer_ptr(&active_state->incoming_packet); - active_state->packlen = get_u32(cp); - if (active_state->packlen < 1 + 4 || - active_state->packlen > PACKET_MAX_SIZE) { + if (sshbuf_len(state->input) < block_size) + return 0; + sshbuf_reset(state->incoming_packet); + if ((r = sshbuf_reserve(state->incoming_packet, block_size, + &cp)) != 0) + goto out; + if ((r = cipher_crypt(&state->receive_context, + state->p_send.seqnr, cp, sshbuf_ptr(state->input), + block_size, 0, 0)) != 0) + goto out; + state->packlen = PEEK_U32(sshbuf_ptr(state->incoming_packet)); + if (state->packlen < 1 + 4 || + state->packlen > PACKET_MAX_SIZE) { #ifdef PACKET_DEBUG - buffer_dump(&active_state->incoming_packet); + fprintf(stderr, "input: \n"); + sshbuf_dump(state->input, stderr); + fprintf(stderr, "incoming_packet: \n"); + sshbuf_dump(state->incoming_packet, stderr); #endif - logit("Bad packet length %u.", active_state->packlen); - packet_start_discard(enc, mac, active_state->packlen, - PACKET_MAX_SIZE); - return SSH_MSG_NONE; + logit("Bad packet length %u.", state->packlen); + return ssh_packet_start_discard(ssh, enc, mac, + state->packlen, PACKET_MAX_SIZE); } - DBG(debug("input: packet len %u", active_state->packlen+4)); - buffer_consume(&active_state->input, block_size); + if ((r = sshbuf_consume(state->input, block_size)) != 0) + goto out; } - /* we have a partial packet of block_size bytes */ - need = 4 + active_state->packlen - block_size; - DBG(debug("partial packet %d, need %d, maclen %d", block_size, - need, maclen)); + DBG(debug("input: packet len %u", state->packlen+4)); + + if (aadlen) { + /* only the payload is encrypted */ + need = state->packlen; + } else { + /* + * the payload size and the payload are encrypted, but we + * have a partial packet of block_size bytes + */ + need = 4 + state->packlen - block_size; + } + DBG(debug("partial packet: block %d, need %d, maclen %d, authlen %d," + " aadlen %d", block_size, need, maclen, authlen, aadlen)); if (need % block_size != 0) { logit("padding error: need %d block %d mod %d", need, block_size, need % block_size); - packet_start_discard(enc, mac, active_state->packlen, - PACKET_MAX_SIZE - block_size); - return SSH_MSG_NONE; + return ssh_packet_start_discard(ssh, enc, mac, + state->packlen, PACKET_MAX_SIZE - block_size); } /* * check if the entire packet has been received and - * decrypt into incoming_packet + * decrypt into incoming_packet: + * 'aadlen' bytes are unencrypted, but authenticated. + * 'need' bytes are encrypted, followed by either + * 'authlen' bytes of authentication tag or + * 'maclen' bytes of message authentication code. */ - if (buffer_len(&active_state->input) < need + maclen) - return SSH_MSG_NONE; + if (sshbuf_len(state->input) < aadlen + need + authlen + maclen) + return 0; #ifdef PACKET_DEBUG fprintf(stderr, "read_poll enc/full: "); - buffer_dump(&active_state->input); + sshbuf_dump(state->input, stderr); #endif - cp = buffer_append_space(&active_state->incoming_packet, need); - cipher_crypt(&active_state->receive_context, cp, - buffer_ptr(&active_state->input), need); - buffer_consume(&active_state->input, need); + /* EtM: compute mac over encrypted input */ + if (mac && mac->enabled && mac->etm) { + if ((r = mac_compute(mac, state->p_read.seqnr, + sshbuf_ptr(state->input), aadlen + need, + macbuf, sizeof(macbuf))) != 0) + goto out; + } + if ((r = sshbuf_reserve(state->incoming_packet, aadlen + need, + &cp)) != 0) + goto out; + if ((r = cipher_crypt(&state->receive_context, state->p_read.seqnr, cp, + sshbuf_ptr(state->input), need, aadlen, authlen)) != 0) + goto out; + if ((r = sshbuf_consume(state->input, aadlen + need + authlen)) != 0) + goto out; /* * compute MAC over seqnr and packet, * increment sequence number for incoming packet */ if (mac && mac->enabled) { - macbuf = mac_compute(mac, active_state->p_read.seqnr, - buffer_ptr(&active_state->incoming_packet), - buffer_len(&active_state->incoming_packet)); - if (timingsafe_bcmp(macbuf, buffer_ptr(&active_state->input), + if (!mac->etm) + if ((r = mac_compute(mac, state->p_read.seqnr, + sshbuf_ptr(state->incoming_packet), + sshbuf_len(state->incoming_packet), + macbuf, sizeof(macbuf))) != 0) + goto out; + if (timingsafe_bcmp(macbuf, sshbuf_ptr(state->input), mac->mac_len) != 0) { logit("Corrupted MAC on input."); if (need > PACKET_MAX_SIZE) - fatal("internal error need %d", need); - packet_start_discard(enc, mac, active_state->packlen, - PACKET_MAX_SIZE - need); - return SSH_MSG_NONE; + return SSH_ERR_INTERNAL_ERROR; + return ssh_packet_start_discard(ssh, enc, mac, + state->packlen, PACKET_MAX_SIZE - need); } - - DBG(debug("MAC #%d ok", active_state->p_read.seqnr)); - buffer_consume(&active_state->input, mac->mac_len); + + DBG(debug("MAC #%d ok", state->p_read.seqnr)); + if ((r = sshbuf_consume(state->input, mac->mac_len)) != 0) + goto out; } - /* XXX now it's safe to use fatal/packet_disconnect */ if (seqnr_p != NULL) - *seqnr_p = active_state->p_read.seqnr; - if (++active_state->p_read.seqnr == 0) + *seqnr_p = state->p_read.seqnr; + if (++state->p_read.seqnr == 0) logit("incoming seqnr wraps around"); - if (++active_state->p_read.packets == 0) - if (!(datafellows & SSH_BUG_NOREKEY)) - fatal("XXX too many packets with same key"); - active_state->p_read.blocks += (active_state->packlen + 4) / block_size; - active_state->p_read.bytes += active_state->packlen + 4; + if (++state->p_read.packets == 0) + if (!(ssh->compat & SSH_BUG_NOREKEY)) + return SSH_ERR_NEED_REKEY; + state->p_read.blocks += (state->packlen + 4) / block_size; + state->p_read.bytes += state->packlen + 4; /* get padlen */ - cp = buffer_ptr(&active_state->incoming_packet); - padlen = cp[4]; + padlen = sshbuf_ptr(state->incoming_packet)[4]; DBG(debug("input: padlen %d", padlen)); - if (padlen < 4) - packet_disconnect("Corrupted padlen %d on input.", padlen); + if (padlen < 4) { + if ((r = sshpkt_disconnect(ssh, + "Corrupted padlen %d on input.", padlen)) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_CONN_CORRUPT; + } /* skip packet size + padlen, discard padding */ - buffer_consume(&active_state->incoming_packet, 4 + 1); - buffer_consume_end(&active_state->incoming_packet, padlen); + if ((r = sshbuf_consume(state->incoming_packet, 4 + 1)) != 0 || + ((r = sshbuf_consume_end(state->incoming_packet, padlen)) != 0)) + goto out; - DBG(debug("input: len before de-compress %d", - buffer_len(&active_state->incoming_packet))); + DBG(debug("input: len before de-compress %zd", + sshbuf_len(state->incoming_packet))); if (comp && comp->enabled) { - buffer_clear(&active_state->compression_buffer); - buffer_uncompress(&active_state->incoming_packet, - &active_state->compression_buffer); - buffer_clear(&active_state->incoming_packet); - buffer_append(&active_state->incoming_packet, - buffer_ptr(&active_state->compression_buffer), - buffer_len(&active_state->compression_buffer)); - DBG(debug("input: len after de-compress %d", - buffer_len(&active_state->incoming_packet))); + sshbuf_reset(state->compression_buffer); + if ((r = uncompress_buffer(ssh, state->incoming_packet, + state->compression_buffer)) != 0) + goto out; + sshbuf_reset(state->incoming_packet); + if ((r = sshbuf_putb(state->incoming_packet, + state->compression_buffer)) != 0) + goto out; + DBG(debug("input: len after de-compress %zd", + sshbuf_len(state->incoming_packet))); } /* * get packet type, implies consume. * return length of payload (without type field) */ - type = buffer_get_char(&active_state->incoming_packet); - if (type < SSH2_MSG_MIN || type >= SSH2_MSG_LOCAL_MIN) - packet_disconnect("Invalid ssh2 packet type: %d", type); - if (type == SSH2_MSG_NEWKEYS) - set_newkeys(MODE_IN); - else if (type == SSH2_MSG_USERAUTH_SUCCESS && - !active_state->server_side) - packet_enable_delayed_compress(); + if ((r = sshbuf_get_u8(state->incoming_packet, typep)) != 0) + goto out; + if (*typep < SSH2_MSG_MIN || *typep >= SSH2_MSG_LOCAL_MIN) { + if ((r = sshpkt_disconnect(ssh, + "Invalid ssh2 packet type: %d", *typep)) != 0 || + (r = ssh_packet_write_wait(ssh)) != 0) + return r; + return SSH_ERR_PROTOCOL_ERROR; + } + if (*typep == SSH2_MSG_NEWKEYS) + r = ssh_set_newkeys(ssh, MODE_IN); + else if (*typep == SSH2_MSG_USERAUTH_SUCCESS && !state->server_side) + r = ssh_packet_enable_delayed_compress(ssh); + else + r = 0; #ifdef PACKET_DEBUG - fprintf(stderr, "read/plain[%d]:\r\n", type); - buffer_dump(&active_state->incoming_packet); + fprintf(stderr, "read/plain[%d]:\r\n", *typep); + sshbuf_dump(state->incoming_packet, stderr); #endif /* reset for next packet */ - active_state->packlen = 0; - return type; + state->packlen = 0; + out: + return r; } int -packet_read_poll_seqnr(u_int32_t *seqnr_p) +ssh_packet_read_poll_seqnr(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p) { + struct session_state *state = ssh->state; u_int reason, seqnr; - u_char type; - char *msg; + int r; + u_char *msg; for (;;) { + msg = NULL; if (compat20) { - type = packet_read_poll2(seqnr_p); - if (type) { - active_state->keep_alive_timeouts = 0; - DBG(debug("received packet type %d", type)); + r = ssh_packet_read_poll2(ssh, typep, seqnr_p); + if (r != 0) + return r; + if (*typep) { + state->keep_alive_timeouts = 0; + DBG(debug("received packet type %d", *typep)); } - switch (type) { + switch (*typep) { case SSH2_MSG_IGNORE: debug3("Received SSH2_MSG_IGNORE"); break; case SSH2_MSG_DEBUG: - packet_get_char(); - msg = packet_get_string(NULL); + if ((r = sshpkt_get_u8(ssh, NULL)) != 0 || + (r = sshpkt_get_string(ssh, &msg, NULL)) != 0 || + (r = sshpkt_get_string(ssh, NULL, NULL)) != 0) { + if (msg) + free(msg); + return r; + } debug("Remote: %.900s", msg); - xfree(msg); - msg = packet_get_string(NULL); - xfree(msg); + free(msg); break; case SSH2_MSG_DISCONNECT: - reason = packet_get_int(); - msg = packet_get_string(NULL); - logit("Received disconnect from %s: %u: %.400s", - get_remote_ipaddr(), reason, msg); - xfree(msg); - cleanup_exit(255); - break; + if ((r = sshpkt_get_u32(ssh, &reason)) != 0 || + (r = sshpkt_get_string(ssh, &msg, NULL)) != 0) + return r; + /* Ignore normal client exit notifications */ + do_log2(ssh->state->server_side && + reason == SSH2_DISCONNECT_BY_APPLICATION ? + SYSLOG_LEVEL_INFO : SYSLOG_LEVEL_ERROR, + "Received disconnect from %s: %u: %.400s", + ssh_remote_ipaddr(ssh), reason, msg); + free(msg); + return SSH_ERR_DISCONNECTED; case SSH2_MSG_UNIMPLEMENTED: - seqnr = packet_get_int(); + if ((r = sshpkt_get_u32(ssh, &seqnr)) != 0) + return r; debug("Received SSH2_MSG_UNIMPLEMENTED for %u", seqnr); break; default: - return type; + return 0; } } else { - type = packet_read_poll1(); - switch (type) { + r = ssh_packet_read_poll1(ssh, typep); + switch (*typep) { + case SSH_MSG_NONE: + return SSH_MSG_NONE; case SSH_MSG_IGNORE: break; case SSH_MSG_DEBUG: - msg = packet_get_string(NULL); + if ((r = sshpkt_get_string(ssh, &msg, NULL)) != 0) + return r; debug("Remote: %.900s", msg); - xfree(msg); + free(msg); break; case SSH_MSG_DISCONNECT: - msg = packet_get_string(NULL); - logit("Received disconnect from %s: %.400s", - get_remote_ipaddr(), msg); - cleanup_exit(255); - break; + if ((r = sshpkt_get_string(ssh, &msg, NULL)) != 0) + return r; + error("Received disconnect from %s: %.400s", + ssh_remote_ipaddr(ssh), msg); + free(msg); + return SSH_ERR_DISCONNECTED; default: - if (type) - DBG(debug("received packet type %d", type)); - return type; + DBG(debug("received packet type %d", *typep)); + return 0; } } } } -int -packet_read_poll(void) -{ - return packet_read_poll_seqnr(NULL); -} - /* * Buffers the given amount of input characters. This is intended to be used * together with packet_read_poll. */ -void -packet_process_incoming(const char *buf, u_int len) +int +ssh_packet_process_incoming(struct ssh *ssh, const char *buf, u_int len) { - if (active_state->packet_discard) { - active_state->keep_alive_timeouts = 0; /* ?? */ - if (len >= active_state->packet_discard) - packet_stop_discard(); - active_state->packet_discard -= len; - return; + struct session_state *state = ssh->state; + int r; + + if (state->packet_discard) { + state->keep_alive_timeouts = 0; /* ?? */ + if (len >= state->packet_discard) { + if ((r = ssh_packet_stop_discard(ssh)) != 0) + return r; + } + state->packet_discard -= len; + return 0; } - buffer_append(&active_state->input, buf, len); -} + if ((r = sshbuf_put(ssh->state->input, buf, len)) != 0) + return r; -/* Returns a character from the packet. */ - -u_int -packet_get_char(void) -{ - char ch; - - buffer_get(&active_state->incoming_packet, &ch, 1); - return (u_char) ch; -} - -/* Returns an integer from the packet data. */ - -u_int -packet_get_int(void) -{ - return buffer_get_int(&active_state->incoming_packet); -} - -/* Returns an 64 bit integer from the packet data. */ - -u_int64_t -packet_get_int64(void) -{ - return buffer_get_int64(&active_state->incoming_packet); -} - -/* - * Returns an arbitrary precision integer from the packet data. The integer - * must have been initialized before this call. - */ - -void -packet_get_bignum(BIGNUM * value) -{ - buffer_get_bignum(&active_state->incoming_packet, value); -} - -void -packet_get_bignum2(BIGNUM * value) -{ - buffer_get_bignum2(&active_state->incoming_packet, value); -} - -#ifdef OPENSSL_HAS_ECC -void -packet_get_ecpoint(const EC_GROUP *curve, EC_POINT *point) -{ - buffer_get_ecpoint(&active_state->incoming_packet, curve, point); -} -#endif - -void * -packet_get_raw(u_int *length_ptr) -{ - u_int bytes = buffer_len(&active_state->incoming_packet); - - if (length_ptr != NULL) - *length_ptr = bytes; - return buffer_ptr(&active_state->incoming_packet); + return 0; } int -packet_remaining(void) +ssh_packet_remaining(struct ssh *ssh) { - return buffer_len(&active_state->incoming_packet); -} - -/* - * Returns a string from the packet data. The string is allocated using - * xmalloc; it is the responsibility of the calling program to free it when - * no longer needed. The length_ptr argument may be NULL, or point to an - * integer into which the length of the string is stored. - */ - -void * -packet_get_string(u_int *length_ptr) -{ - return buffer_get_string(&active_state->incoming_packet, length_ptr); -} - -void * -packet_get_string_ptr(u_int *length_ptr) -{ - return buffer_get_string_ptr(&active_state->incoming_packet, length_ptr); -} - -/* Ensures the returned string has no embedded \0 characters in it. */ -char * -packet_get_cstring(u_int *length_ptr) -{ - return buffer_get_cstring(&active_state->incoming_packet, length_ptr); + return sshbuf_len(ssh->state->incoming_packet); } /* @@ -1579,16 +1888,16 @@ packet_get_cstring(u_int *length_ptr) * message is printed immediately, but only if the client is being executed * in verbose mode. These messages are primarily intended to ease debugging * authentication problems. The length of the formatted message must not - * exceed 1024 bytes. This will automatically call packet_write_wait. + * exceed 1024 bytes. This will automatically call ssh_packet_write_wait. */ - void -packet_send_debug(const char *fmt,...) +ssh_packet_send_debug(struct ssh *ssh, const char *fmt,...) { char buf[1024]; va_list args; + int r; - if (compat20 && (datafellows & SSH_BUG_DEBUG)) + if (compat20 && (ssh->compat & SSH_BUG_DEBUG)) return; va_start(args, fmt); @@ -1596,16 +1905,62 @@ packet_send_debug(const char *fmt,...) va_end(args); if (compat20) { - packet_start(SSH2_MSG_DEBUG); - packet_put_char(0); /* bool: always display */ - packet_put_cstring(buf); - packet_put_cstring(""); + if ((r = sshpkt_start(ssh, SSH2_MSG_DEBUG)) != 0 || + (r = sshpkt_put_u8(ssh, 0)) != 0 || /* always display */ + (r = sshpkt_put_cstring(ssh, buf)) != 0 || + (r = sshpkt_put_cstring(ssh, "")) != 0 || + (r = sshpkt_send(ssh)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); } else { - packet_start(SSH_MSG_DEBUG); - packet_put_cstring(buf); + if ((r = sshpkt_start(ssh, SSH_MSG_DEBUG)) != 0 || + (r = sshpkt_put_cstring(ssh, buf)) != 0 || + (r = sshpkt_send(ssh)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + } + if ((r = ssh_packet_write_wait(ssh)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); +} + +/* + * Pretty-print connection-terminating errors and exit. + */ +void +sshpkt_fatal(struct ssh *ssh, const char *tag, int r) +{ + switch (r) { + case SSH_ERR_CONN_CLOSED: + logit("Connection closed by %.200s", ssh_remote_ipaddr(ssh)); + cleanup_exit(255); + case SSH_ERR_CONN_TIMEOUT: + logit("Connection to %.200s timed out", ssh_remote_ipaddr(ssh)); + cleanup_exit(255); + case SSH_ERR_DISCONNECTED: + logit("Disconnected from %.200s", + ssh_remote_ipaddr(ssh)); + cleanup_exit(255); + case SSH_ERR_SYSTEM_ERROR: + if (errno == ECONNRESET) { + logit("Connection reset by %.200s", + ssh_remote_ipaddr(ssh)); + cleanup_exit(255); + } + /* FALLTHROUGH */ + case SSH_ERR_NO_CIPHER_ALG_MATCH: + case SSH_ERR_NO_MAC_ALG_MATCH: + case SSH_ERR_NO_COMPRESS_ALG_MATCH: + case SSH_ERR_NO_KEX_ALG_MATCH: + case SSH_ERR_NO_HOSTKEY_ALG_MATCH: + if (ssh && ssh->kex && ssh->kex->failed_choice) { + fatal("Unable to negotiate with %.200s: %s. " + "Their offer: %s", ssh_remote_ipaddr(ssh), + ssh_err(r), ssh->kex->failed_choice); + } + /* FALLTHROUGH */ + default: + fatal("%s%sConnection to %.200s: %s", + tag != NULL ? tag : "", tag != NULL ? ": " : "", + ssh_remote_ipaddr(ssh), ssh_err(r)); } - packet_send(); - packet_write_wait(); } /* @@ -1614,13 +1969,13 @@ packet_send_debug(const char *fmt,...) * should not contain a newline. The length of the formatted message must * not exceed 1024 bytes. */ - void -packet_disconnect(const char *fmt,...) +ssh_packet_disconnect(struct ssh *ssh, const char *fmt,...) { char buf[1024]; va_list args; static int disconnecting = 0; + int r; if (disconnecting) /* Guard against recursive invocations. */ fatal("packet_disconnect called recursively."); @@ -1637,96 +1992,98 @@ packet_disconnect(const char *fmt,...) /* Display the error locally */ logit("Disconnecting: %.100s", buf); - /* Send the disconnect message to the other side, and wait for it to get sent. */ - if (compat20) { - packet_start(SSH2_MSG_DISCONNECT); - packet_put_int(SSH2_DISCONNECT_PROTOCOL_ERROR); - packet_put_cstring(buf); - packet_put_cstring(""); - } else { - packet_start(SSH_MSG_DISCONNECT); - packet_put_cstring(buf); - } - packet_send(); - packet_write_wait(); + /* + * Send the disconnect message to the other side, and wait + * for it to get sent. + */ + if ((r = sshpkt_disconnect(ssh, "%s", buf)) != 0) + sshpkt_fatal(ssh, __func__, r); - /* Stop listening for connections. */ - channel_close_all(); + if ((r = ssh_packet_write_wait(ssh)) != 0) + sshpkt_fatal(ssh, __func__, r); /* Close the connection. */ - packet_close(); + ssh_packet_close(ssh); cleanup_exit(255); } -/* Checks if there is any buffered output, and tries to write some of the output. */ - -void -packet_write_poll(void) +/* + * Checks if there is any buffered output, and tries to write some of + * the output. + */ +int +ssh_packet_write_poll(struct ssh *ssh) { - int len = buffer_len(&active_state->output); - int cont; + struct session_state *state = ssh->state; + int len = sshbuf_len(state->output); + int cont, r; if (len > 0) { cont = 0; - len = roaming_write(active_state->connection_out, - buffer_ptr(&active_state->output), len, &cont); + len = roaming_write(state->connection_out, + sshbuf_ptr(state->output), len, &cont); if (len == -1) { if (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK) - return; - fatal("Write failed: %.100s", strerror(errno)); + return 0; + return SSH_ERR_SYSTEM_ERROR; } if (len == 0 && !cont) - fatal("Write connection closed"); - buffer_consume(&active_state->output, len); + return SSH_ERR_CONN_CLOSED; + if ((r = sshbuf_consume(state->output, len)) != 0) + return r; } + return 0; } /* * Calls packet_write_poll repeatedly until all pending output data has been * written. */ - -void -packet_write_wait(void) +int +ssh_packet_write_wait(struct ssh *ssh) { fd_set *setp; - int ret, ms_remain; + int ret, r, ms_remain = 0; struct timeval start, timeout, *timeoutp = NULL; - + struct session_state *state = ssh->state; #ifndef WIN32_FIXME - setp = (fd_set *)xcalloc(howmany(active_state->connection_out + 1, + setp = calloc(howmany(state->connection_out + 1, NFDBITS), sizeof(fd_mask)); #else setp = (fd_set *)xmalloc(sizeof(fd_set)); FD_ZERO(setp); #endif - packet_write_poll(); - while (packet_have_data_to_write()) { + + if (setp == NULL) + return SSH_ERR_ALLOC_FAIL; + ssh_packet_write_poll(ssh); + while (ssh_packet_have_data_to_write(ssh)) { #ifndef WIN32_FIXME - memset(setp, 0, howmany(active_state->connection_out + 1, + memset(setp, 0, howmany(state->connection_out + 1, NFDBITS) * sizeof(fd_mask)); #else FD_ZERO(setp); #endif - FD_SET(active_state->connection_out, setp); + + FD_SET(state->connection_out, setp); - if (active_state->packet_timeout_ms > 0) { - ms_remain = active_state->packet_timeout_ms; + if (state->packet_timeout_ms > 0) { + ms_remain = state->packet_timeout_ms; timeoutp = &timeout; } for (;;) { - if (active_state->packet_timeout_ms != -1) { + if (state->packet_timeout_ms != -1) { ms_to_timeval(&timeout, ms_remain); gettimeofday(&start, NULL); } - if ((ret = select(active_state->connection_out + 1, + if ((ret = select(state->connection_out + 1, NULL, setp, NULL, timeoutp)) >= 0) break; if (errno != EAGAIN && errno != EINTR && errno != EWOULDBLOCK) break; - if (active_state->packet_timeout_ms == -1) + if (state->packet_timeout_ms == -1) continue; ms_subtract_diff(&start, &ms_remain); if (ms_remain <= 0) { @@ -1735,45 +2092,48 @@ packet_write_wait(void) } } if (ret == 0) { - logit("Connection to %.200s timed out while " - "waiting to write", get_remote_ipaddr()); - cleanup_exit(255); + free(setp); + return SSH_ERR_CONN_TIMEOUT; + } + if ((r = ssh_packet_write_poll(ssh)) != 0) { + free(setp); + return r; } - packet_write_poll(); } - xfree(setp); + free(setp); + return 0; } /* Returns true if there is buffered data to write to the connection. */ int -packet_have_data_to_write(void) +ssh_packet_have_data_to_write(struct ssh *ssh) { - return buffer_len(&active_state->output) != 0; + return sshbuf_len(ssh->state->output) != 0; } /* Returns true if there is not too much data to write to the connection. */ int -packet_not_very_much_data_to_write(void) +ssh_packet_not_very_much_data_to_write(struct ssh *ssh) { - if (active_state->interactive_mode) - return buffer_len(&active_state->output) < 16384; + if (ssh->state->interactive_mode) + return sshbuf_len(ssh->state->output) < 16384; else - return buffer_len(&active_state->output) < 128 * 1024; + return sshbuf_len(ssh->state->output) < 128 * 1024; } -static void -packet_set_tos(int tos) +void +ssh_packet_set_tos(struct ssh *ssh, int tos) { #ifndef IP_TOS_IS_BROKEN - if (!packet_connection_is_on_socket()) + if (!ssh_packet_connection_is_on_socket(ssh)) return; - switch (packet_connection_af()) { + switch (ssh_packet_connection_af(ssh)) { # ifdef IP_TOS case AF_INET: debug3("%s: set IP_TOS 0x%02x", __func__, tos); - if (setsockopt(active_state->connection_in, + if (setsockopt(ssh->state->connection_in, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0) error("setsockopt IP_TOS %d: %.100s:", tos, strerror(errno)); @@ -1782,7 +2142,7 @@ packet_set_tos(int tos) # ifdef IPV6_TCLASS case AF_INET6: debug3("%s: set IPV6_TCLASS 0x%02x", __func__, tos); - if (setsockopt(active_state->connection_in, + if (setsockopt(ssh->state->connection_in, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof(tos)) < 0) error("setsockopt IPV6_TCLASS %d: %.100s:", tos, strerror(errno)); @@ -1795,71 +2155,69 @@ packet_set_tos(int tos) /* Informs that the current session is interactive. Sets IP flags for that. */ void -packet_set_interactive(int interactive, int qos_interactive, int qos_bulk) +ssh_packet_set_interactive(struct ssh *ssh, int interactive, int qos_interactive, int qos_bulk) { - if (active_state->set_interactive_called) + struct session_state *state = ssh->state; + + if (state->set_interactive_called) return; - active_state->set_interactive_called = 1; + state->set_interactive_called = 1; /* Record that we are in interactive mode. */ - active_state->interactive_mode = interactive; + state->interactive_mode = interactive; /* Only set socket options if using a socket. */ - if (!packet_connection_is_on_socket()) + if (!ssh_packet_connection_is_on_socket(ssh)) return; - set_nodelay(active_state->connection_in); - packet_set_tos(interactive ? qos_interactive : qos_bulk); + set_nodelay(state->connection_in); + ssh_packet_set_tos(ssh, interactive ? qos_interactive : + qos_bulk); } /* Returns true if the current connection is interactive. */ int -packet_is_interactive(void) +ssh_packet_is_interactive(struct ssh *ssh) { - return active_state->interactive_mode; + return ssh->state->interactive_mode; } int -packet_set_maxsize(u_int s) +ssh_packet_set_maxsize(struct ssh *ssh, u_int s) { - if (active_state->set_maxsize_called) { + struct session_state *state = ssh->state; + + if (state->set_maxsize_called) { logit("packet_set_maxsize: called twice: old %d new %d", - active_state->max_packet_size, s); + state->max_packet_size, s); return -1; } if (s < 4 * 1024 || s > 1024 * 1024) { logit("packet_set_maxsize: bad size %d", s); return -1; } - active_state->set_maxsize_called = 1; + state->set_maxsize_called = 1; debug("packet_set_maxsize: setting to %d", s); - active_state->max_packet_size = s; + state->max_packet_size = s; return s; } int -packet_inc_alive_timeouts(void) +ssh_packet_inc_alive_timeouts(struct ssh *ssh) { - return ++active_state->keep_alive_timeouts; + return ++ssh->state->keep_alive_timeouts; } void -packet_set_alive_timeouts(int ka) +ssh_packet_set_alive_timeouts(struct ssh *ssh, int ka) { - active_state->keep_alive_timeouts = ka; + ssh->state->keep_alive_timeouts = ka; } u_int -packet_get_maxsize(void) +ssh_packet_get_maxsize(struct ssh *ssh) { - return active_state->max_packet_size; -} - -/* roundup current message to pad bytes */ -void -packet_add_padding(u_char pad) -{ - active_state->extra_pad = pad; + return ssh->state->max_packet_size; } /* @@ -1874,115 +2232,718 @@ packet_add_padding(u_char pad) * protection measure against advanced traffic analysis techniques. */ void -packet_send_ignore(int nbytes) +ssh_packet_send_ignore(struct ssh *ssh, int nbytes) { u_int32_t rnd = 0; - int i; + int r, i; - packet_start(compat20 ? SSH2_MSG_IGNORE : SSH_MSG_IGNORE); - packet_put_int(nbytes); + if ((r = sshpkt_start(ssh, compat20 ? + SSH2_MSG_IGNORE : SSH_MSG_IGNORE)) != 0 || + (r = sshpkt_put_u32(ssh, nbytes)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); for (i = 0; i < nbytes; i++) { if (i % 4 == 0) rnd = arc4random(); - packet_put_char((u_char)rnd & 0xff); + if ((r = sshpkt_put_u8(ssh, (u_char)rnd & 0xff)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); rnd >>= 8; } } #define MAX_PACKETS (1U<<31) int -packet_need_rekeying(void) +ssh_packet_need_rekeying(struct ssh *ssh) { - if (datafellows & SSH_BUG_NOREKEY) + struct session_state *state = ssh->state; + + if (ssh->compat & SSH_BUG_NOREKEY) return 0; return - (active_state->p_send.packets > MAX_PACKETS) || - (active_state->p_read.packets > MAX_PACKETS) || - (active_state->max_blocks_out && - (active_state->p_send.blocks > active_state->max_blocks_out)) || - (active_state->max_blocks_in && - (active_state->p_read.blocks > active_state->max_blocks_in)); + (state->p_send.packets > MAX_PACKETS) || + (state->p_read.packets > MAX_PACKETS) || + (state->max_blocks_out && + (state->p_send.blocks > state->max_blocks_out)) || + (state->max_blocks_in && + (state->p_read.blocks > state->max_blocks_in)) || + (state->rekey_interval != 0 && state->rekey_time + + state->rekey_interval <= monotime()); } void -packet_set_rekey_limit(u_int32_t bytes) +ssh_packet_set_rekey_limits(struct ssh *ssh, u_int32_t bytes, time_t seconds) { - active_state->rekey_limit = bytes; + debug3("rekey after %lld bytes, %d seconds", (long long)bytes, + (int)seconds); + ssh->state->rekey_limit = bytes; + ssh->state->rekey_interval = seconds; +} + +time_t +ssh_packet_get_rekey_timeout(struct ssh *ssh) +{ + time_t seconds; + + seconds = ssh->state->rekey_time + ssh->state->rekey_interval - + monotime(); + return (seconds <= 0 ? 1 : seconds); } void -packet_set_server(void) +ssh_packet_set_server(struct ssh *ssh) { - active_state->server_side = 1; + ssh->state->server_side = 1; } void -packet_set_authenticated(void) +ssh_packet_set_authenticated(struct ssh *ssh) { - active_state->after_authentication = 1; + ssh->state->after_authentication = 1; } void * -packet_get_input(void) +ssh_packet_get_input(struct ssh *ssh) { - return (void *)&active_state->input; + return (void *)ssh->state->input; } void * -packet_get_output(void) +ssh_packet_get_output(struct ssh *ssh) { - return (void *)&active_state->output; -} - -void * -packet_get_newkeys(int mode) -{ - return (void *)active_state->newkeys[mode]; + return (void *)ssh->state->output; } +/* XXX TODO update roaming to new API (does not work anyway) */ /* * Save the state for the real connection, and use a separate state when * resuming a suspended connection. */ void -packet_backup_state(void) +ssh_packet_backup_state(struct ssh *ssh, + struct ssh *backup_state) { - struct session_state *tmp; + struct ssh *tmp; - close(active_state->connection_in); - active_state->connection_in = -1; - close(active_state->connection_out); - active_state->connection_out = -1; + close(ssh->state->connection_in); + ssh->state->connection_in = -1; + close(ssh->state->connection_out); + ssh->state->connection_out = -1; if (backup_state) tmp = backup_state; else - tmp = alloc_session_state(); - backup_state = active_state; - active_state = tmp; + tmp = ssh_alloc_session_state(); + backup_state = ssh; + ssh = tmp; } +/* XXX FIXME FIXME FIXME */ /* * Swap in the old state when resuming a connecion. */ void -packet_restore_state(void) +ssh_packet_restore_state(struct ssh *ssh, + struct ssh *backup_state) { - struct session_state *tmp; - void *buf; + struct ssh *tmp; u_int len; + int r; tmp = backup_state; - backup_state = active_state; - active_state = tmp; - active_state->connection_in = backup_state->connection_in; - backup_state->connection_in = -1; - active_state->connection_out = backup_state->connection_out; - backup_state->connection_out = -1; - len = buffer_len(&backup_state->input); + backup_state = ssh; + ssh = tmp; + ssh->state->connection_in = backup_state->state->connection_in; + backup_state->state->connection_in = -1; + ssh->state->connection_out = backup_state->state->connection_out; + backup_state->state->connection_out = -1; + len = sshbuf_len(backup_state->state->input); if (len > 0) { - buf = buffer_ptr(&backup_state->input); - buffer_append(&active_state->input, buf, len); - buffer_clear(&backup_state->input); + if ((r = sshbuf_putb(ssh->state->input, + backup_state->state->input)) != 0) + fatal("%s: %s", __func__, ssh_err(r)); + sshbuf_reset(backup_state->state->input); add_recv_bytes(len); } } + +/* Reset after_authentication and reset compression in post-auth privsep */ +static int +ssh_packet_set_postauth(struct ssh *ssh) +{ + struct sshcomp *comp; + int r, mode; + + debug("%s: called", __func__); + /* This was set in net child, but is not visible in user child */ + ssh->state->after_authentication = 1; + ssh->state->rekeying = 0; + for (mode = 0; mode < MODE_MAX; mode++) { + if (ssh->state->newkeys[mode] == NULL) + continue; + comp = &ssh->state->newkeys[mode]->comp; + if (comp && comp->enabled && + (r = ssh_packet_init_compression(ssh)) != 0) + return r; + } + return 0; +} + +/* Packet state (de-)serialization for privsep */ + +/* turn kex into a blob for packet state serialization */ +static int +kex_to_blob(struct sshbuf *m, struct kex *kex) +{ + int r; + + if ((r = sshbuf_put_string(m, kex->session_id, + kex->session_id_len)) != 0 || + (r = sshbuf_put_u32(m, kex->we_need)) != 0 || + (r = sshbuf_put_u32(m, kex->hostkey_type)) != 0 || + (r = sshbuf_put_u32(m, kex->kex_type)) != 0 || + (r = sshbuf_put_stringb(m, kex->my)) != 0 || + (r = sshbuf_put_stringb(m, kex->peer)) != 0 || + (r = sshbuf_put_u32(m, kex->flags)) != 0 || + (r = sshbuf_put_cstring(m, kex->client_version_string)) != 0 || + (r = sshbuf_put_cstring(m, kex->server_version_string)) != 0) + return r; + return 0; +} + +/* turn key exchange results into a blob for packet state serialization */ +static int +newkeys_to_blob(struct sshbuf *m, struct ssh *ssh, int mode) +{ + struct sshbuf *b; + struct sshcipher_ctx *cc; + struct sshcomp *comp; + struct sshenc *enc; + struct sshmac *mac; + struct newkeys *newkey; + int r; + + if ((newkey = ssh->state->newkeys[mode]) == NULL) + return SSH_ERR_INTERNAL_ERROR; + enc = &newkey->enc; + mac = &newkey->mac; + comp = &newkey->comp; + cc = (mode == MODE_OUT) ? &ssh->state->send_context : + &ssh->state->receive_context; + if ((r = cipher_get_keyiv(cc, enc->iv, enc->iv_len)) != 0) + return r; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + /* The cipher struct is constant and shared, you export pointer */ + if ((r = sshbuf_put_cstring(b, enc->name)) != 0 || + (r = sshbuf_put(b, &enc->cipher, sizeof(enc->cipher))) != 0 || + (r = sshbuf_put_u32(b, enc->enabled)) != 0 || + (r = sshbuf_put_u32(b, enc->block_size)) != 0 || + (r = sshbuf_put_string(b, enc->key, enc->key_len)) != 0 || + (r = sshbuf_put_string(b, enc->iv, enc->iv_len)) != 0) + goto out; + if (cipher_authlen(enc->cipher) == 0) { + if ((r = sshbuf_put_cstring(b, mac->name)) != 0 || + (r = sshbuf_put_u32(b, mac->enabled)) != 0 || + (r = sshbuf_put_string(b, mac->key, mac->key_len)) != 0) + goto out; + } + if ((r = sshbuf_put_u32(b, comp->type)) != 0 || + (r = sshbuf_put_u32(b, comp->enabled)) != 0 || + (r = sshbuf_put_cstring(b, comp->name)) != 0) + goto out; + r = sshbuf_put_stringb(m, b); + out: + if (b != NULL) + sshbuf_free(b); + return r; +} + +/* serialize packet state into a blob */ +int +ssh_packet_get_state(struct ssh *ssh, struct sshbuf *m) +{ + struct session_state *state = ssh->state; + u_char *p; + size_t slen, rlen; + int r, ssh1cipher; + + if (!compat20) { + ssh1cipher = cipher_get_number(state->receive_context.cipher); + slen = cipher_get_keyiv_len(&state->send_context); + rlen = cipher_get_keyiv_len(&state->receive_context); + if ((r = sshbuf_put_u32(m, state->remote_protocol_flags)) != 0 || + (r = sshbuf_put_u32(m, ssh1cipher)) != 0 || + (r = sshbuf_put_string(m, state->ssh1_key, state->ssh1_keylen)) != 0 || + (r = sshbuf_put_u32(m, slen)) != 0 || + (r = sshbuf_reserve(m, slen, &p)) != 0 || + (r = cipher_get_keyiv(&state->send_context, p, slen)) != 0 || + (r = sshbuf_put_u32(m, rlen)) != 0 || + (r = sshbuf_reserve(m, rlen, &p)) != 0 || + (r = cipher_get_keyiv(&state->receive_context, p, rlen)) != 0) + return r; + } else { + if ((r = kex_to_blob(m, ssh->kex)) != 0 || + (r = newkeys_to_blob(m, ssh, MODE_OUT)) != 0 || + (r = newkeys_to_blob(m, ssh, MODE_IN)) != 0 || + (r = sshbuf_put_u32(m, state->rekey_limit)) != 0 || + (r = sshbuf_put_u32(m, state->rekey_interval)) != 0 || + (r = sshbuf_put_u32(m, state->p_send.seqnr)) != 0 || + (r = sshbuf_put_u64(m, state->p_send.blocks)) != 0 || + (r = sshbuf_put_u32(m, state->p_send.packets)) != 0 || + (r = sshbuf_put_u64(m, state->p_send.bytes)) != 0 || + (r = sshbuf_put_u32(m, state->p_read.seqnr)) != 0 || + (r = sshbuf_put_u64(m, state->p_read.blocks)) != 0 || + (r = sshbuf_put_u32(m, state->p_read.packets)) != 0 || + (r = sshbuf_put_u64(m, state->p_read.bytes)) != 0) + return r; + } + + slen = cipher_get_keycontext(&state->send_context, NULL); + rlen = cipher_get_keycontext(&state->receive_context, NULL); + if ((r = sshbuf_put_u32(m, slen)) != 0 || + (r = sshbuf_reserve(m, slen, &p)) != 0) + return r; + if (cipher_get_keycontext(&state->send_context, p) != (int)slen) + return SSH_ERR_INTERNAL_ERROR; + if ((r = sshbuf_put_u32(m, rlen)) != 0 || + (r = sshbuf_reserve(m, rlen, &p)) != 0) + return r; + if (cipher_get_keycontext(&state->receive_context, p) != (int)rlen) + return SSH_ERR_INTERNAL_ERROR; + + if ((r = ssh_packet_get_compress_state(m, ssh)) != 0 || + (r = sshbuf_put_stringb(m, state->input)) != 0 || + (r = sshbuf_put_stringb(m, state->output)) != 0) + return r; + + if (compat20) { + if ((r = sshbuf_put_u64(m, get_sent_bytes())) != 0 || + (r = sshbuf_put_u64(m, get_recv_bytes())) != 0) + return r; + } + return 0; +} + +/* restore key exchange results from blob for packet state de-serialization */ +static int +newkeys_from_blob(struct sshbuf *m, struct ssh *ssh, int mode) +{ + struct sshbuf *b = NULL; + struct sshcomp *comp; + struct sshenc *enc; + struct sshmac *mac; + struct newkeys *newkey = NULL; + size_t keylen, ivlen, maclen; + int r; + + if ((newkey = calloc(1, sizeof(*newkey))) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_froms(m, &b)) != 0) + goto out; +#ifdef DEBUG_PK + sshbuf_dump(b, stderr); +#endif + enc = &newkey->enc; + mac = &newkey->mac; + comp = &newkey->comp; + + if ((r = sshbuf_get_cstring(b, &enc->name, NULL)) != 0 || + (r = sshbuf_get(b, &enc->cipher, sizeof(enc->cipher))) != 0 || + (r = sshbuf_get_u32(b, (u_int *)&enc->enabled)) != 0 || + (r = sshbuf_get_u32(b, &enc->block_size)) != 0 || + (r = sshbuf_get_string(b, &enc->key, &keylen)) != 0 || + (r = sshbuf_get_string(b, &enc->iv, &ivlen)) != 0) + goto out; + if (cipher_authlen(enc->cipher) == 0) { + if ((r = sshbuf_get_cstring(b, &mac->name, NULL)) != 0) + goto out; + if ((r = mac_setup(mac, mac->name)) != 0) + goto out; + if ((r = sshbuf_get_u32(b, (u_int *)&mac->enabled)) != 0 || + (r = sshbuf_get_string(b, &mac->key, &maclen)) != 0) + goto out; + if (maclen > mac->key_len) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + mac->key_len = maclen; + } + if ((r = sshbuf_get_u32(b, &comp->type)) != 0 || + (r = sshbuf_get_u32(b, (u_int *)&comp->enabled)) != 0 || + (r = sshbuf_get_cstring(b, &comp->name, NULL)) != 0) + goto out; + if (enc->name == NULL || + cipher_by_name(enc->name) != enc->cipher) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(b) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + enc->key_len = keylen; + enc->iv_len = ivlen; + ssh->kex->newkeys[mode] = newkey; + newkey = NULL; + r = 0; + out: + if (newkey != NULL) + free(newkey); + if (b != NULL) + sshbuf_free(b); + return r; +} + +/* restore kex from blob for packet state de-serialization */ +static int +kex_from_blob(struct sshbuf *m, struct kex **kexp) +{ + struct kex *kex; + int r; + + if ((kex = calloc(1, sizeof(struct kex))) == NULL || + (kex->my = sshbuf_new()) == NULL || + (kex->peer = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_get_string(m, &kex->session_id, &kex->session_id_len)) != 0 || + (r = sshbuf_get_u32(m, &kex->we_need)) != 0 || + (r = sshbuf_get_u32(m, (u_int *)&kex->hostkey_type)) != 0 || + (r = sshbuf_get_u32(m, &kex->kex_type)) != 0 || + (r = sshbuf_get_stringb(m, kex->my)) != 0 || + (r = sshbuf_get_stringb(m, kex->peer)) != 0 || + (r = sshbuf_get_u32(m, &kex->flags)) != 0 || + (r = sshbuf_get_cstring(m, &kex->client_version_string, NULL)) != 0 || + (r = sshbuf_get_cstring(m, &kex->server_version_string, NULL)) != 0) + goto out; + kex->server = 1; + kex->done = 1; + r = 0; + out: + if (r != 0 || kexp == NULL) { + if (kex != NULL) { + if (kex->my != NULL) + sshbuf_free(kex->my); + if (kex->peer != NULL) + sshbuf_free(kex->peer); + free(kex); + } + if (kexp != NULL) + *kexp = NULL; + } else { + *kexp = kex; + } + return r; +} + +/* + * Restore packet state from content of blob 'm' (de-serialization). + * Note that 'm' will be partially consumed on parsing or any other errors. + */ +int +ssh_packet_set_state(struct ssh *ssh, struct sshbuf *m) +{ + struct session_state *state = ssh->state; + const u_char *ssh1key, *ivin, *ivout, *keyin, *keyout, *input, *output; + size_t ssh1keylen, rlen, slen, ilen, olen; + int r; + u_int ssh1cipher = 0; + u_int64_t sent_bytes = 0, recv_bytes = 0; + + if (!compat20) { + if ((r = sshbuf_get_u32(m, &state->remote_protocol_flags)) != 0 || + (r = sshbuf_get_u32(m, &ssh1cipher)) != 0 || + (r = sshbuf_get_string_direct(m, &ssh1key, &ssh1keylen)) != 0 || + (r = sshbuf_get_string_direct(m, &ivout, &slen)) != 0 || + (r = sshbuf_get_string_direct(m, &ivin, &rlen)) != 0) + return r; + if (ssh1cipher > INT_MAX) + return SSH_ERR_KEY_UNKNOWN_CIPHER; + ssh_packet_set_encryption_key(ssh, ssh1key, ssh1keylen, + (int)ssh1cipher); + if (cipher_get_keyiv_len(&state->send_context) != (int)slen || + cipher_get_keyiv_len(&state->receive_context) != (int)rlen) + return SSH_ERR_INVALID_FORMAT; + if ((r = cipher_set_keyiv(&state->send_context, ivout)) != 0 || + (r = cipher_set_keyiv(&state->receive_context, ivin)) != 0) + return r; + } else { + if ((r = kex_from_blob(m, &ssh->kex)) != 0 || + (r = newkeys_from_blob(m, ssh, MODE_OUT)) != 0 || + (r = newkeys_from_blob(m, ssh, MODE_IN)) != 0 || + (r = sshbuf_get_u32(m, &state->rekey_limit)) != 0 || + (r = sshbuf_get_u32(m, &state->rekey_interval)) != 0 || + (r = sshbuf_get_u32(m, &state->p_send.seqnr)) != 0 || + (r = sshbuf_get_u64(m, &state->p_send.blocks)) != 0 || + (r = sshbuf_get_u32(m, &state->p_send.packets)) != 0 || + (r = sshbuf_get_u64(m, &state->p_send.bytes)) != 0 || + (r = sshbuf_get_u32(m, &state->p_read.seqnr)) != 0 || + (r = sshbuf_get_u64(m, &state->p_read.blocks)) != 0 || + (r = sshbuf_get_u32(m, &state->p_read.packets)) != 0 || + (r = sshbuf_get_u64(m, &state->p_read.bytes)) != 0) + return r; + /* + * We set the time here so that in post-auth privsep slave we + * count from the completion of the authentication. + */ + state->rekey_time = monotime(); + /* XXX ssh_set_newkeys overrides p_read.packets? XXX */ + if ((r = ssh_set_newkeys(ssh, MODE_IN)) != 0 || + (r = ssh_set_newkeys(ssh, MODE_OUT)) != 0) + return r; + } + if ((r = sshbuf_get_string_direct(m, &keyout, &slen)) != 0 || + (r = sshbuf_get_string_direct(m, &keyin, &rlen)) != 0) + return r; + if (cipher_get_keycontext(&state->send_context, NULL) != (int)slen || + cipher_get_keycontext(&state->receive_context, NULL) != (int)rlen) + return SSH_ERR_INVALID_FORMAT; + cipher_set_keycontext(&state->send_context, keyout); + cipher_set_keycontext(&state->receive_context, keyin); + + if ((r = ssh_packet_set_compress_state(ssh, m)) != 0 || + (r = ssh_packet_set_postauth(ssh)) != 0) + return r; + + sshbuf_reset(state->input); + sshbuf_reset(state->output); + if ((r = sshbuf_get_string_direct(m, &input, &ilen)) != 0 || + (r = sshbuf_get_string_direct(m, &output, &olen)) != 0 || + (r = sshbuf_put(state->input, input, ilen)) != 0 || + (r = sshbuf_put(state->output, output, olen)) != 0) + return r; + + if (compat20) { + if ((r = sshbuf_get_u64(m, &sent_bytes)) != 0 || + (r = sshbuf_get_u64(m, &recv_bytes)) != 0) + return r; + roam_set_bytes(sent_bytes, recv_bytes); + } + if (sshbuf_len(m)) + return SSH_ERR_INVALID_FORMAT; + debug3("%s: done", __func__); + return 0; +} + +/* NEW API */ + +/* put data to the outgoing packet */ + +int +sshpkt_put(struct ssh *ssh, const void *v, size_t len) +{ + return sshbuf_put(ssh->state->outgoing_packet, v, len); +} + +int +sshpkt_putb(struct ssh *ssh, const struct sshbuf *b) +{ + return sshbuf_putb(ssh->state->outgoing_packet, b); +} + +int +sshpkt_put_u8(struct ssh *ssh, u_char val) +{ + return sshbuf_put_u8(ssh->state->outgoing_packet, val); +} + +int +sshpkt_put_u32(struct ssh *ssh, u_int32_t val) +{ + return sshbuf_put_u32(ssh->state->outgoing_packet, val); +} + +int +sshpkt_put_u64(struct ssh *ssh, u_int64_t val) +{ + return sshbuf_put_u64(ssh->state->outgoing_packet, val); +} + +int +sshpkt_put_string(struct ssh *ssh, const void *v, size_t len) +{ + return sshbuf_put_string(ssh->state->outgoing_packet, v, len); +} + +int +sshpkt_put_cstring(struct ssh *ssh, const void *v) +{ + return sshbuf_put_cstring(ssh->state->outgoing_packet, v); +} + +int +sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v) +{ + return sshbuf_put_stringb(ssh->state->outgoing_packet, v); +} + +#ifdef WITH_OPENSSL +#ifdef OPENSSL_HAS_ECC +int +sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g) +{ + return sshbuf_put_ec(ssh->state->outgoing_packet, v, g); +} +#endif /* OPENSSL_HAS_ECC */ + +#ifdef WITH_SSH1 +int +sshpkt_put_bignum1(struct ssh *ssh, const BIGNUM *v) +{ + return sshbuf_put_bignum1(ssh->state->outgoing_packet, v); +} +#endif /* WITH_SSH1 */ + +int +sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v) +{ + return sshbuf_put_bignum2(ssh->state->outgoing_packet, v); +} +#endif /* WITH_OPENSSL */ + +/* fetch data from the incoming packet */ + +int +sshpkt_get(struct ssh *ssh, void *valp, size_t len) +{ + return sshbuf_get(ssh->state->incoming_packet, valp, len); +} + +int +sshpkt_get_u8(struct ssh *ssh, u_char *valp) +{ + return sshbuf_get_u8(ssh->state->incoming_packet, valp); +} + +int +sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp) +{ + return sshbuf_get_u32(ssh->state->incoming_packet, valp); +} + +int +sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp) +{ + return sshbuf_get_u64(ssh->state->incoming_packet, valp); +} + +int +sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp) +{ + return sshbuf_get_string(ssh->state->incoming_packet, valp, lenp); +} + +int +sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp) +{ + return sshbuf_get_string_direct(ssh->state->incoming_packet, valp, lenp); +} + +int +sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp) +{ + return sshbuf_get_cstring(ssh->state->incoming_packet, valp, lenp); +} + +#ifdef WITH_OPENSSL +#ifdef OPENSSL_HAS_ECC +int +sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g) +{ + return sshbuf_get_ec(ssh->state->incoming_packet, v, g); +} +#endif /* OPENSSL_HAS_ECC */ + +#ifdef WITH_SSH1 +int +sshpkt_get_bignum1(struct ssh *ssh, BIGNUM *v) +{ + return sshbuf_get_bignum1(ssh->state->incoming_packet, v); +} +#endif /* WITH_SSH1 */ + +int +sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v) +{ + return sshbuf_get_bignum2(ssh->state->incoming_packet, v); +} +#endif /* WITH_OPENSSL */ + +int +sshpkt_get_end(struct ssh *ssh) +{ + if (sshbuf_len(ssh->state->incoming_packet) > 0) + return SSH_ERR_UNEXPECTED_TRAILING_DATA; + return 0; +} + +const u_char * +sshpkt_ptr(struct ssh *ssh, size_t *lenp) +{ + if (lenp != NULL) + *lenp = sshbuf_len(ssh->state->incoming_packet); + return sshbuf_ptr(ssh->state->incoming_packet); +} + +/* start a new packet */ + +int +sshpkt_start(struct ssh *ssh, u_char type) +{ + u_char buf[9]; + int len; + + DBG(debug("packet_start[%d]", type)); + len = compat20 ? 6 : 9; + memset(buf, 0, len - 1); + buf[len - 1] = type; + sshbuf_reset(ssh->state->outgoing_packet); + return sshbuf_put(ssh->state->outgoing_packet, buf, len); +} + +/* send it */ + +int +sshpkt_send(struct ssh *ssh) +{ + if (compat20) + return ssh_packet_send2(ssh); + else + return ssh_packet_send1(ssh); +} + +int +sshpkt_disconnect(struct ssh *ssh, const char *fmt,...) +{ + char buf[1024]; + va_list args; + int r; + + va_start(args, fmt); + vsnprintf(buf, sizeof(buf), fmt, args); + va_end(args); + + if (compat20) { + if ((r = sshpkt_start(ssh, SSH2_MSG_DISCONNECT)) != 0 || + (r = sshpkt_put_u32(ssh, SSH2_DISCONNECT_PROTOCOL_ERROR)) != 0 || + (r = sshpkt_put_cstring(ssh, buf)) != 0 || + (r = sshpkt_put_cstring(ssh, "")) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; + } else { + if ((r = sshpkt_start(ssh, SSH_MSG_DISCONNECT)) != 0 || + (r = sshpkt_put_cstring(ssh, buf)) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; + } + return 0; +} + +/* roundup current message to pad bytes */ +int +sshpkt_add_padding(struct ssh *ssh, u_char pad) +{ + ssh->state->extra_pad = pad; + return 0; +} diff --git a/packet.h b/packet.h index 90eec17..7b06544 100644 --- a/packet.h +++ b/packet.h @@ -1,4 +1,4 @@ -/* $OpenBSD: packet.h,v 1.56 2011/05/06 21:14:05 djm Exp $ */ +/* $OpenBSD: packet.h,v 1.66 2015/01/30 01:13:33 djm Exp $ */ /* * Author: Tatu Ylonen @@ -18,110 +18,189 @@ #include -#include -#ifdef OPENSSL_HAS_ECC -#include -#endif +#ifdef WITH_OPENSSL +# include +# ifdef OPENSSL_HAS_ECC +# include +# else /* OPENSSL_HAS_ECC */ +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +# endif /* OPENSSL_HAS_ECC */ +#else /* WITH_OPENSSL */ +# define BIGNUM void +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +#endif /* WITH_OPENSSL */ -void packet_set_connection(int, int); -void packet_set_timeout(int, int); -void packet_set_nonblocking(void); -int packet_get_connection_in(void); -int packet_get_connection_out(void); -void packet_close(void); -void packet_set_encryption_key(const u_char *, u_int, int); -u_int packet_get_encryption_key(u_char *); -void packet_set_protocol_flags(u_int); -u_int packet_get_protocol_flags(void); -void packet_start_compression(int); -void packet_set_interactive(int, int, int); -int packet_is_interactive(void); -void packet_set_server(void); -void packet_set_authenticated(void); +#include +#include "openbsd-compat/sys-queue.h" -void packet_start(u_char); -void packet_put_char(int ch); -void packet_put_int(u_int value); -void packet_put_int64(u_int64_t value); -void packet_put_bignum(BIGNUM * value); -void packet_put_bignum2(BIGNUM * value); -#ifdef OPENSSL_HAS_ECC -void packet_put_ecpoint(const EC_GROUP *, const EC_POINT *); -#endif -void packet_put_string(const void *buf, u_int len); -void packet_put_cstring(const char *str); -void packet_put_raw(const void *buf, u_int len); -void packet_send(void); +struct kex; +struct sshkey; +struct sshbuf; +struct session_state; /* private session data */ -int packet_read(void); -void packet_read_expect(int type); -int packet_read_poll(void); -void packet_process_incoming(const char *buf, u_int len); -int packet_read_seqnr(u_int32_t *seqnr_p); -int packet_read_poll_seqnr(u_int32_t *seqnr_p); +#include "dispatch.h" /* typedef, DISPATCH_MAX */ -u_int packet_get_char(void); -u_int packet_get_int(void); -u_int64_t packet_get_int64(void); -void packet_get_bignum(BIGNUM * value); -void packet_get_bignum2(BIGNUM * value); -#ifdef OPENSSL_HAS_ECC -void packet_get_ecpoint(const EC_GROUP *, EC_POINT *); -#endif -void *packet_get_raw(u_int *length_ptr); -void *packet_get_string(u_int *length_ptr); -char *packet_get_cstring(u_int *length_ptr); -void *packet_get_string_ptr(u_int *length_ptr); -void packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2))); -void packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2))); +struct key_entry { + TAILQ_ENTRY(key_entry) next; + struct sshkey *key; +}; -void set_newkeys(int mode); -int packet_get_keyiv_len(int); -void packet_get_keyiv(int, u_char *, u_int); -int packet_get_keycontext(int, u_char *); -void packet_set_keycontext(int, u_char *); -void packet_get_state(int, u_int32_t *, u_int64_t *, u_int32_t *, u_int64_t *); -void packet_set_state(int, u_int32_t, u_int64_t, u_int32_t, u_int64_t); -int packet_get_ssh1_cipher(void); -void packet_set_iv(int, u_char *); -void *packet_get_newkeys(int); +struct ssh { + /* Session state */ + struct session_state *state; -void packet_write_poll(void); -void packet_write_wait(void); -int packet_have_data_to_write(void); -int packet_not_very_much_data_to_write(void); + /* Key exchange */ + struct kex *kex; -int packet_connection_is_on_socket(void); -int packet_remaining(void); -void packet_send_ignore(int); -void packet_add_padding(u_char); + /* cached remote ip address and port*/ + char *remote_ipaddr; + int remote_port; + + /* Dispatcher table */ + dispatch_fn *dispatch[DISPATCH_MAX]; + /* number of packets to ignore in the dispatcher */ + int dispatch_skip_packets; + + /* datafellows */ + int compat; + + /* Lists for private and public keys */ + TAILQ_HEAD(, key_entry) private_keys; + TAILQ_HEAD(, key_entry) public_keys; + + /* APP data */ + void *app_data; +}; + +struct ssh *ssh_alloc_session_state(void); +struct ssh *ssh_packet_set_connection(struct ssh *, int, int); +void ssh_packet_set_timeout(struct ssh *, int, int); +int ssh_packet_stop_discard(struct ssh *); +int ssh_packet_connection_af(struct ssh *); +void ssh_packet_set_nonblocking(struct ssh *); +int ssh_packet_get_connection_in(struct ssh *); +int ssh_packet_get_connection_out(struct ssh *); +void ssh_packet_close(struct ssh *); +void ssh_packet_set_encryption_key(struct ssh *, const u_char *, u_int, int); +void ssh_packet_set_protocol_flags(struct ssh *, u_int); +u_int ssh_packet_get_protocol_flags(struct ssh *); +int ssh_packet_start_compression(struct ssh *, int); +void ssh_packet_set_tos(struct ssh *, int); +void ssh_packet_set_interactive(struct ssh *, int, int, int); +int ssh_packet_is_interactive(struct ssh *); +void ssh_packet_set_server(struct ssh *); +void ssh_packet_set_authenticated(struct ssh *); + +int ssh_packet_send1(struct ssh *); +int ssh_packet_send2_wrapped(struct ssh *); +int ssh_packet_send2(struct ssh *); + +int ssh_packet_read(struct ssh *); +int ssh_packet_read_expect(struct ssh *, u_int type); +int ssh_packet_read_poll(struct ssh *); +int ssh_packet_read_poll1(struct ssh *, u_char *); +int ssh_packet_read_poll2(struct ssh *, u_char *, u_int32_t *seqnr_p); +int ssh_packet_process_incoming(struct ssh *, const char *buf, u_int len); +int ssh_packet_read_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); +int ssh_packet_read_poll_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p); + +const void *ssh_packet_get_string_ptr(struct ssh *, u_int *length_ptr); +void ssh_packet_disconnect(struct ssh *, const char *fmt, ...) + __attribute__((format(printf, 2, 3))) + __attribute__((noreturn)); +void ssh_packet_send_debug(struct ssh *, const char *fmt, ...) __attribute__((format(printf, 2, 3))); + +int ssh_set_newkeys(struct ssh *, int mode); +void ssh_packet_get_bytes(struct ssh *, u_int64_t *, u_int64_t *); + +typedef void *(ssh_packet_comp_alloc_func)(void *, u_int, u_int); +typedef void (ssh_packet_comp_free_func)(void *, void *); +void ssh_packet_set_compress_hooks(struct ssh *, void *, + ssh_packet_comp_alloc_func *, ssh_packet_comp_free_func *); + +int ssh_packet_write_poll(struct ssh *); +int ssh_packet_write_wait(struct ssh *); +int ssh_packet_have_data_to_write(struct ssh *); +int ssh_packet_not_very_much_data_to_write(struct ssh *); + +int ssh_packet_connection_is_on_socket(struct ssh *); +int ssh_packet_remaining(struct ssh *); +void ssh_packet_send_ignore(struct ssh *, int); void tty_make_modes(int, struct termios *); void tty_parse_modes(int, int *); -void packet_set_alive_timeouts(int); -int packet_inc_alive_timeouts(void); -int packet_set_maxsize(u_int); -u_int packet_get_maxsize(void); +void ssh_packet_set_alive_timeouts(struct ssh *, int); +int ssh_packet_inc_alive_timeouts(struct ssh *); +int ssh_packet_set_maxsize(struct ssh *, u_int); +u_int ssh_packet_get_maxsize(struct ssh *); -/* don't allow remaining bytes after the end of the message */ -#define packet_check_eom() \ -do { \ - int _len = packet_remaining(); \ - if (_len > 0) { \ - logit("Packet integrity error (%d bytes remaining) at %s:%d", \ - _len ,__FILE__, __LINE__); \ - packet_disconnect("Packet integrity error."); \ - } \ -} while (0) +int ssh_packet_get_state(struct ssh *, struct sshbuf *); +int ssh_packet_set_state(struct ssh *, struct sshbuf *); -int packet_need_rekeying(void); -void packet_set_rekey_limit(u_int32_t); +const char *ssh_remote_ipaddr(struct ssh *); -void packet_backup_state(void); -void packet_restore_state(void); +int ssh_packet_need_rekeying(struct ssh *); +void ssh_packet_set_rekey_limits(struct ssh *, u_int32_t, time_t); +time_t ssh_packet_get_rekey_timeout(struct ssh *); -void *packet_get_input(void); -void *packet_get_output(void); +/* XXX FIXME */ +void ssh_packet_backup_state(struct ssh *, struct ssh *); +void ssh_packet_restore_state(struct ssh *, struct ssh *); + +void *ssh_packet_get_input(struct ssh *); +void *ssh_packet_get_output(struct ssh *); + +/* new API */ +int sshpkt_start(struct ssh *ssh, u_char type); +int sshpkt_send(struct ssh *ssh); +int sshpkt_disconnect(struct ssh *, const char *fmt, ...) + __attribute__((format(printf, 2, 3))); +int sshpkt_add_padding(struct ssh *, u_char); +void sshpkt_fatal(struct ssh *ssh, const char *tag, int r); + +int sshpkt_put(struct ssh *ssh, const void *v, size_t len); +int sshpkt_putb(struct ssh *ssh, const struct sshbuf *b); +int sshpkt_put_u8(struct ssh *ssh, u_char val); +int sshpkt_put_u32(struct ssh *ssh, u_int32_t val); +int sshpkt_put_u64(struct ssh *ssh, u_int64_t val); +int sshpkt_put_string(struct ssh *ssh, const void *v, size_t len); +int sshpkt_put_cstring(struct ssh *ssh, const void *v); +int sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v); +int sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g); +int sshpkt_put_bignum1(struct ssh *ssh, const BIGNUM *v); +int sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v); + +int sshpkt_get(struct ssh *ssh, void *valp, size_t len); +int sshpkt_get_u8(struct ssh *ssh, u_char *valp); +int sshpkt_get_u32(struct ssh *ssh, u_int32_t *valp); +int sshpkt_get_u64(struct ssh *ssh, u_int64_t *valp); +int sshpkt_get_string(struct ssh *ssh, u_char **valp, size_t *lenp); +int sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp); +int sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp); +int sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g); +int sshpkt_get_bignum1(struct ssh *ssh, BIGNUM *v); +int sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v); +int sshpkt_get_end(struct ssh *ssh); +const u_char *sshpkt_ptr(struct ssh *, size_t *lenp); + +/* OLD API */ +extern struct ssh *active_state; +#include "opacket.h" + +#if !defined(WITH_OPENSSL) +# undef BIGNUM +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#elif !defined(OPENSSL_HAS_ECC) +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#endif #endif /* PACKET_H */ diff --git a/pathnames.h b/pathnames.h index c524801..27e8620 100644 --- a/pathnames.h +++ b/pathnames.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pathnames.h,v 1.22 2011/05/23 03:30:07 djm Exp $ */ +/* $OpenBSD: pathnames.h,v 1.24 2013/12/06 13:39:49 markus Exp $ */ /* * Author: Tatu Ylonen @@ -34,27 +34,32 @@ * Of these, ssh_host_key must be readable only by root, whereas ssh_config * should be world-readable. */ + #ifdef WIN32_FIXME # define _PATH_SERVER_CONFIG_FILE "sshd_config" # define _PATH_HOST_CONFIG_FILE "ssh_config" # define _PATH_HOST_KEY_FILE "ssh_host_key" # define _PATH_HOST_DSA_KEY_FILE "ssh_host_dsa_key" # define _PATH_HOST_ECDSA_KEY_FILE "ssh_host_ecdsa_key" +# define _PATH_HOST_ED25519_KEY_FILE "ssh_host_ed25519_key" # define _PATH_HOST_RSA_KEY_FILE "ssh_host_rsa_key" # define _PATH_DH_MODULI "/moduli" # define _PATH_DH_PRIMES "/primes" # define _PATH_SSH_PROGRAM "ssh.exe" #else + #define _PATH_SERVER_CONFIG_FILE SSHDIR "/sshd_config" #define _PATH_HOST_CONFIG_FILE SSHDIR "/ssh_config" #define _PATH_HOST_KEY_FILE SSHDIR "/ssh_host_key" #define _PATH_HOST_DSA_KEY_FILE SSHDIR "/ssh_host_dsa_key" #define _PATH_HOST_ECDSA_KEY_FILE SSHDIR "/ssh_host_ecdsa_key" +#define _PATH_HOST_ED25519_KEY_FILE SSHDIR "/ssh_host_ed25519_key" #define _PATH_HOST_RSA_KEY_FILE SSHDIR "/ssh_host_rsa_key" #define _PATH_DH_MODULI SSHDIR "/moduli" /* Backwards compatibility */ #define _PATH_DH_PRIMES SSHDIR "/primes" + #ifndef _PATH_SSH_PROGRAM #define _PATH_SSH_PROGRAM "/usr/bin/ssh" #endif @@ -81,18 +86,19 @@ * readable by anyone except the user him/herself, though this does not * contain anything particularly secret. */ -#define _PATH_SSH_USER_HOSTFILE "~/.ssh/known_hosts" +#define _PATH_SSH_USER_HOSTFILE "~/" _PATH_SSH_USER_DIR "/known_hosts" /* backward compat for protocol 2 */ -#define _PATH_SSH_USER_HOSTFILE2 "~/.ssh/known_hosts2" +#define _PATH_SSH_USER_HOSTFILE2 "~/" _PATH_SSH_USER_DIR "/known_hosts2" /* * Name of the default file containing client-side authentication key. This * file should only be readable by the user him/herself. */ -#define _PATH_SSH_CLIENT_IDENTITY ".ssh/identity" -#define _PATH_SSH_CLIENT_ID_DSA ".ssh/id_dsa" -#define _PATH_SSH_CLIENT_ID_ECDSA ".ssh/id_ecdsa" -#define _PATH_SSH_CLIENT_ID_RSA ".ssh/id_rsa" +#define _PATH_SSH_CLIENT_IDENTITY _PATH_SSH_USER_DIR "/identity" +#define _PATH_SSH_CLIENT_ID_DSA _PATH_SSH_USER_DIR "/id_dsa" +#define _PATH_SSH_CLIENT_ID_ECDSA _PATH_SSH_USER_DIR "/id_ecdsa" +#define _PATH_SSH_CLIENT_ID_RSA _PATH_SSH_USER_DIR "/id_rsa" +#define _PATH_SSH_CLIENT_ID_ED25519 _PATH_SSH_USER_DIR "/id_ed25519" /* * Configuration file in user's home directory. This file need not be @@ -100,7 +106,7 @@ * particularly secret. If the user's home directory resides on an NFS * volume where root is mapped to nobody, this may need to be world-readable. */ -#define _PATH_SSH_USER_CONFFILE ".ssh/config" +#define _PATH_SSH_USER_CONFFILE _PATH_SSH_USER_DIR "/config" /* * File containing a list of those rsa keys that permit logging in as this @@ -110,10 +116,10 @@ * may need to be world-readable. (This file is read by the daemon which is * running as root.) */ -#define _PATH_SSH_USER_PERMITTED_KEYS ".ssh/authorized_keys" +#define _PATH_SSH_USER_PERMITTED_KEYS _PATH_SSH_USER_DIR "/authorized_keys" /* backward compat for protocol v2 */ -#define _PATH_SSH_USER_PERMITTED_KEYS2 ".ssh/authorized_keys2" +#define _PATH_SSH_USER_PERMITTED_KEYS2 _PATH_SSH_USER_DIR "/authorized_keys2" /* * Per-user and system-wide ssh "rc" files. These files are executed with @@ -121,7 +127,7 @@ * passed "proto cookie" as arguments if X11 forwarding with spoofing is in * use. xauth will be run if neither of these exists. */ -#define _PATH_SSH_USER_RC ".ssh/rc" +#define _PATH_SSH_USER_RC _PATH_SSH_USER_DIR "/rc" #define _PATH_SSH_SYSTEM_RC SSHDIR "/sshrc" /* @@ -157,6 +163,8 @@ #endif #endif + + /* UNIX domain socket for X11 server; displaynum will replace %u */ #ifndef _PATH_UNIX_X #define _PATH_UNIX_X "/tmp/.X11-unix/X%u" diff --git a/pkcs11.h b/pkcs11.h index 2cde5b3..b01d58f 100644 --- a/pkcs11.h +++ b/pkcs11.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pkcs11.h,v 1.2 2010/02/24 06:12:53 djm Exp $ */ +/* $OpenBSD: pkcs11.h,v 1.3 2013/11/26 19:15:09 deraadt Exp $ */ /* pkcs11.h Copyright 2006, 2007 g10 Code GmbH Copyright 2006 Andreas Jellinghaus @@ -319,7 +319,7 @@ typedef unsigned long ck_object_class_t; #define CKO_HW_FEATURE (5) #define CKO_DOMAIN_PARAMETERS (6) #define CKO_MECHANISM (7) -#define CKO_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKO_VENDOR_DEFINED (1U << 31) typedef unsigned long ck_hw_feature_type_t; @@ -327,7 +327,7 @@ typedef unsigned long ck_hw_feature_type_t; #define CKH_MONOTONIC_COUNTER (1) #define CKH_CLOCK (2) #define CKH_USER_INTERFACE (3) -#define CKH_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKH_VENDOR_DEFINED (1U << 31) typedef unsigned long ck_key_type_t; @@ -357,14 +357,14 @@ typedef unsigned long ck_key_type_t; #define CKK_AES (0x1f) #define CKK_BLOWFISH (0x20) #define CKK_TWOFISH (0x21) -#define CKK_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKK_VENDOR_DEFINED (1U << 31) typedef unsigned long ck_certificate_type_t; #define CKC_X_509 (0) #define CKC_X_509_ATTR_CERT (1) #define CKC_WTLS (2) -#define CKC_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKC_VENDOR_DEFINED (1U << 31) typedef unsigned long ck_attribute_type_t; @@ -453,7 +453,7 @@ typedef unsigned long ck_attribute_type_t; #define CKA_WRAP_TEMPLATE (CKF_ARRAY_ATTRIBUTE | 0x211) #define CKA_UNWRAP_TEMPLATE (CKF_ARRAY_ATTRIBUTE | 0x212) #define CKA_ALLOWED_MECHANISMS (CKF_ARRAY_ATTRIBUTE | 0x600) -#define CKA_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKA_VENDOR_DEFINED (1U << 31) struct ck_attribute @@ -672,7 +672,7 @@ typedef unsigned long ck_mechanism_type_t; #define CKM_DSA_PARAMETER_GEN (0x2000) #define CKM_DH_PKCS_PARAMETER_GEN (0x2001) #define CKM_X9_42_DH_PARAMETER_GEN (0x2002) -#define CKM_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKM_VENDOR_DEFINED (1U << 31) struct ck_mechanism @@ -703,7 +703,7 @@ struct ck_mechanism_info #define CKF_WRAP (1 << 17) #define CKF_UNWRAP (1 << 18) #define CKF_DERIVE (1 << 19) -#define CKF_EXTENSION ((unsigned long) (1 << 31)) +#define CKF_EXTENSION (1U << 31) /* Flags for C_WaitForSlotEvent. */ @@ -1179,7 +1179,7 @@ struct ck_c_initialize_args #define CKR_MUTEX_BAD (0x1a0) #define CKR_MUTEX_NOT_LOCKED (0x1a1) #define CKR_FUNCTION_REJECTED (0x200) -#define CKR_VENDOR_DEFINED ((unsigned long) (1 << 31)) +#define CKR_VENDOR_DEFINED (1U << 31) diff --git a/platform.c b/platform.c index a455472..ee313da 100644 --- a/platform.c +++ b/platform.c @@ -1,4 +1,4 @@ -/* $Id: platform.c,v 1.18 2011/01/11 06:02:25 djm Exp $ */ +/* $Id: platform.c,v 1.22 2014/07/18 04:11:26 djm Exp $ */ /* * Copyright (c) 2006 Darren Tucker. All rights reserved. @@ -25,6 +25,7 @@ #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "key.h" #include "hostfile.h" @@ -54,6 +55,14 @@ platform_pre_fork(void) #endif } +void +platform_pre_restart(void) +{ +#ifdef LINUX_OOM_ADJUST + oom_adjust_restore(); +#endif +} + void platform_post_fork_parent(pid_t child_pid) { @@ -156,12 +165,6 @@ platform_setusercontext_post_groups(struct passwd *pw) aix_usrinfo(pw); #endif /* _AIX */ -#if !defined(HAVE_LOGIN_CAP) && defined(USE_LIBIAF) - if (set_id(pw->pw_name) != 0) { - exit(1); - } -# endif /* USE_LIBIAF */ - #ifdef HAVE_SETPCRED /* * If we have a chroot directory, we set all creds except real @@ -194,3 +197,19 @@ platform_krb5_get_principal_name(const char *pw_name) return NULL; #endif } + +/* + * return 1 if the specified uid is a uid that may own a system directory + * otherwise 0. + */ +int +platform_sys_dir_uid(uid_t uid) +{ + if (uid == 0) + return 1; +#ifdef PLATFORM_SYS_DIR_UID + if (uid == PLATFORM_SYS_DIR_UID) + return 1; +#endif + return 0; +} diff --git a/platform.h b/platform.h index 944d2c3..1c7a45d 100644 --- a/platform.h +++ b/platform.h @@ -1,4 +1,4 @@ -/* $Id: platform.h,v 1.7 2010/11/05 03:47:01 dtucker Exp $ */ +/* $Id: platform.h,v 1.9 2013/09/22 09:02:40 dtucker Exp $ */ /* * Copyright (c) 2006 Darren Tucker. All rights reserved. @@ -22,6 +22,7 @@ void platform_pre_listen(void); void platform_pre_fork(void); +void platform_pre_restart(void); void platform_post_fork_parent(pid_t child_pid); void platform_post_fork_child(void); int platform_privileged_uidswap(void); @@ -29,5 +30,4 @@ void platform_setusercontext(struct passwd *); void platform_setusercontext_post_groups(struct passwd *); char *platform_get_krb5_client(const char *); char *platform_krb5_get_principal_name(const char *); - - +int platform_sys_dir_uid(uid_t); diff --git a/poly1305.c b/poly1305.c new file mode 100644 index 0000000..6fd1fc8 --- /dev/null +++ b/poly1305.c @@ -0,0 +1,160 @@ +/* + * Public Domain poly1305 from Andrew Moon + * poly1305-donna-unrolled.c from https://github.com/floodyberry/poly1305-donna + */ + +/* $OpenBSD: poly1305.c,v 1.3 2013/12/19 22:57:13 djm Exp $ */ + +#include "includes.h" + +#include +#ifdef HAVE_STDINT_H +# include +#endif + +#include "poly1305.h" + +#define mul32x32_64(a,b) ((uint64_t)(a) * (b)) + +#define U8TO32_LE(p) \ + (((uint32_t)((p)[0])) | \ + ((uint32_t)((p)[1]) << 8) | \ + ((uint32_t)((p)[2]) << 16) | \ + ((uint32_t)((p)[3]) << 24)) + +#define U32TO8_LE(p, v) \ + do { \ + (p)[0] = (uint8_t)((v)); \ + (p)[1] = (uint8_t)((v) >> 8); \ + (p)[2] = (uint8_t)((v) >> 16); \ + (p)[3] = (uint8_t)((v) >> 24); \ + } while (0) + +void +poly1305_auth(unsigned char out[POLY1305_TAGLEN], const unsigned char *m, size_t inlen, const unsigned char key[POLY1305_KEYLEN]) { + uint32_t t0,t1,t2,t3; + uint32_t h0,h1,h2,h3,h4; + uint32_t r0,r1,r2,r3,r4; + uint32_t s1,s2,s3,s4; + uint32_t b, nb; + size_t j; + uint64_t t[5]; + uint64_t f0,f1,f2,f3; + uint32_t g0,g1,g2,g3,g4; + uint64_t c; + unsigned char mp[16]; + + /* clamp key */ + t0 = U8TO32_LE(key+0); + t1 = U8TO32_LE(key+4); + t2 = U8TO32_LE(key+8); + t3 = U8TO32_LE(key+12); + + /* precompute multipliers */ + r0 = t0 & 0x3ffffff; t0 >>= 26; t0 |= t1 << 6; + r1 = t0 & 0x3ffff03; t1 >>= 20; t1 |= t2 << 12; + r2 = t1 & 0x3ffc0ff; t2 >>= 14; t2 |= t3 << 18; + r3 = t2 & 0x3f03fff; t3 >>= 8; + r4 = t3 & 0x00fffff; + + s1 = r1 * 5; + s2 = r2 * 5; + s3 = r3 * 5; + s4 = r4 * 5; + + /* init state */ + h0 = 0; + h1 = 0; + h2 = 0; + h3 = 0; + h4 = 0; + + /* full blocks */ + if (inlen < 16) goto poly1305_donna_atmost15bytes; +poly1305_donna_16bytes: + m += 16; + inlen -= 16; + + t0 = U8TO32_LE(m-16); + t1 = U8TO32_LE(m-12); + t2 = U8TO32_LE(m-8); + t3 = U8TO32_LE(m-4); + + h0 += t0 & 0x3ffffff; + h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff; + h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff; + h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff; + h4 += (t3 >> 8) | (1 << 24); + + +poly1305_donna_mul: + t[0] = mul32x32_64(h0,r0) + mul32x32_64(h1,s4) + mul32x32_64(h2,s3) + mul32x32_64(h3,s2) + mul32x32_64(h4,s1); + t[1] = mul32x32_64(h0,r1) + mul32x32_64(h1,r0) + mul32x32_64(h2,s4) + mul32x32_64(h3,s3) + mul32x32_64(h4,s2); + t[2] = mul32x32_64(h0,r2) + mul32x32_64(h1,r1) + mul32x32_64(h2,r0) + mul32x32_64(h3,s4) + mul32x32_64(h4,s3); + t[3] = mul32x32_64(h0,r3) + mul32x32_64(h1,r2) + mul32x32_64(h2,r1) + mul32x32_64(h3,r0) + mul32x32_64(h4,s4); + t[4] = mul32x32_64(h0,r4) + mul32x32_64(h1,r3) + mul32x32_64(h2,r2) + mul32x32_64(h3,r1) + mul32x32_64(h4,r0); + + h0 = (uint32_t)t[0] & 0x3ffffff; c = (t[0] >> 26); + t[1] += c; h1 = (uint32_t)t[1] & 0x3ffffff; b = (uint32_t)(t[1] >> 26); + t[2] += b; h2 = (uint32_t)t[2] & 0x3ffffff; b = (uint32_t)(t[2] >> 26); + t[3] += b; h3 = (uint32_t)t[3] & 0x3ffffff; b = (uint32_t)(t[3] >> 26); + t[4] += b; h4 = (uint32_t)t[4] & 0x3ffffff; b = (uint32_t)(t[4] >> 26); + h0 += b * 5; + + if (inlen >= 16) goto poly1305_donna_16bytes; + + /* final bytes */ +poly1305_donna_atmost15bytes: + if (!inlen) goto poly1305_donna_finish; + + for (j = 0; j < inlen; j++) mp[j] = m[j]; + mp[j++] = 1; + for (; j < 16; j++) mp[j] = 0; + inlen = 0; + + t0 = U8TO32_LE(mp+0); + t1 = U8TO32_LE(mp+4); + t2 = U8TO32_LE(mp+8); + t3 = U8TO32_LE(mp+12); + + h0 += t0 & 0x3ffffff; + h1 += ((((uint64_t)t1 << 32) | t0) >> 26) & 0x3ffffff; + h2 += ((((uint64_t)t2 << 32) | t1) >> 20) & 0x3ffffff; + h3 += ((((uint64_t)t3 << 32) | t2) >> 14) & 0x3ffffff; + h4 += (t3 >> 8); + + goto poly1305_donna_mul; + +poly1305_donna_finish: + b = h0 >> 26; h0 = h0 & 0x3ffffff; + h1 += b; b = h1 >> 26; h1 = h1 & 0x3ffffff; + h2 += b; b = h2 >> 26; h2 = h2 & 0x3ffffff; + h3 += b; b = h3 >> 26; h3 = h3 & 0x3ffffff; + h4 += b; b = h4 >> 26; h4 = h4 & 0x3ffffff; + h0 += b * 5; b = h0 >> 26; h0 = h0 & 0x3ffffff; + h1 += b; + + g0 = h0 + 5; b = g0 >> 26; g0 &= 0x3ffffff; + g1 = h1 + b; b = g1 >> 26; g1 &= 0x3ffffff; + g2 = h2 + b; b = g2 >> 26; g2 &= 0x3ffffff; + g3 = h3 + b; b = g3 >> 26; g3 &= 0x3ffffff; + g4 = h4 + b - (1 << 26); + + b = (g4 >> 31) - 1; + nb = ~b; + h0 = (h0 & nb) | (g0 & b); + h1 = (h1 & nb) | (g1 & b); + h2 = (h2 & nb) | (g2 & b); + h3 = (h3 & nb) | (g3 & b); + h4 = (h4 & nb) | (g4 & b); + + f0 = ((h0 ) | (h1 << 26)) + (uint64_t)U8TO32_LE(&key[16]); + f1 = ((h1 >> 6) | (h2 << 20)) + (uint64_t)U8TO32_LE(&key[20]); + f2 = ((h2 >> 12) | (h3 << 14)) + (uint64_t)U8TO32_LE(&key[24]); + f3 = ((h3 >> 18) | (h4 << 8)) + (uint64_t)U8TO32_LE(&key[28]); + + U32TO8_LE(&out[ 0], f0); f1 += (f0 >> 32); + U32TO8_LE(&out[ 4], f1); f2 += (f1 >> 32); + U32TO8_LE(&out[ 8], f2); f3 += (f2 >> 32); + U32TO8_LE(&out[12], f3); +} diff --git a/poly1305.h b/poly1305.h new file mode 100644 index 0000000..f7db5f8 --- /dev/null +++ b/poly1305.h @@ -0,0 +1,22 @@ +/* $OpenBSD: poly1305.h,v 1.4 2014/05/02 03:27:54 djm Exp $ */ + +/* + * Public Domain poly1305 from Andrew Moon + * poly1305-donna-unrolled.c from https://github.com/floodyberry/poly1305-donna + */ + +#ifndef POLY1305_H +#define POLY1305_H + +#include + +#define POLY1305_KEYLEN 32 +#define POLY1305_TAGLEN 16 + +void poly1305_auth(u_char out[POLY1305_TAGLEN], const u_char *m, size_t inlen, + const u_char key[POLY1305_KEYLEN]) + __attribute__((__bounded__(__minbytes__, 1, POLY1305_TAGLEN))) + __attribute__((__bounded__(__buffer__, 2, 3))) + __attribute__((__bounded__(__minbytes__, 4, POLY1305_KEYLEN))); + +#endif /* POLY1305_H */ diff --git a/progressmeter.c b/progressmeter.c index 99ab5cc..bfca249 100644 --- a/progressmeter.c +++ b/progressmeter.c @@ -1,4 +1,4 @@ -/* $OpenBSD: progressmeter.c,v 1.37 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: progressmeter.c,v 1.41 2015/01/14 13:54:13 djm Exp $ */ /* * Copyright (c) 2003 Nils Nordman. All rights reserved. * @@ -65,7 +65,8 @@ static void update_progress_meter(int); static time_t start; /* start progress */ static time_t last_update; /* last progress update */ -static char *file; /* name of the file being transferred */ +static const char *file; /* name of the file being transferred */ +static off_t start_pos; /* initial position of transfer */ static off_t end_pos; /* ending position of transfer */ static off_t cur_pos; /* transfer position as of last refresh */ static volatile off_t *counter; /* progress counter */ @@ -78,7 +79,7 @@ static volatile sig_atomic_t win_resized; /* for window resizing */ static const char unit[] = " KMGT"; static int -can_output(void) +can_output(void) { #ifndef WIN32_FIXME return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); @@ -123,7 +124,6 @@ void refresh_progress_meter(void) { #ifndef WIN32_FIXME - char buf[MAX_WINSIZE + 1]; time_t now; off_t transferred; @@ -135,9 +135,9 @@ refresh_progress_meter(void) int i, len; int file_len; - transferred = *counter - cur_pos; + transferred = *counter - (cur_pos ? cur_pos : start_pos); cur_pos = *counter; - now = time(NULL); + now = monotime(); bytes_left = end_pos - cur_pos; if (bytes_left > 0) @@ -145,7 +145,7 @@ refresh_progress_meter(void) else { elapsed = now - start; /* Calculate true total speed when done */ - transferred = end_pos; + transferred = end_pos - start_pos; bytes_per_second = 0; } @@ -256,10 +256,11 @@ update_progress_meter(int ignore) } void -start_progress_meter(char *f, off_t filesize, off_t *ctr) +start_progress_meter(const char *f, off_t filesize, off_t *ctr) { - start = last_update = time(NULL); + start = last_update = monotime(); file = f; + start_pos = *ctr; end_pos = filesize; cur_pos = 0; counter = ctr; @@ -304,7 +305,7 @@ sig_winch(int sig) static void setscreensize(void) { -#ifndef WIN32_FIXME + #ifndef WIN32_FIXME struct winsize winsize; if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && diff --git a/progressmeter.h b/progressmeter.h index 10bab99..bf179dc 100644 --- a/progressmeter.h +++ b/progressmeter.h @@ -1,4 +1,4 @@ -/* $OpenBSD: progressmeter.h,v 1.2 2006/03/25 22:22:43 djm Exp $ */ +/* $OpenBSD: progressmeter.h,v 1.3 2015/01/14 13:54:13 djm Exp $ */ /* * Copyright (c) 2002 Nils Nordman. All rights reserved. * @@ -23,5 +23,5 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -void start_progress_meter(char *, off_t, off_t *); +void start_progress_meter(const char *, off_t, off_t *); void stop_progress_meter(void); diff --git a/readconf.c b/readconf.c index 870515c..6d05210 100644 --- a/readconf.c +++ b/readconf.c @@ -1,4 +1,4 @@ -/* $OpenBSD: readconf.c,v 1.193 2011/05/24 07:15:47 djm Exp $ */ +/* $OpenBSD: readconf.c,v 1.239 2015/07/30 00:01:34 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -17,19 +17,34 @@ #include #include #include +#include +#include #include #include #include +#include #include #include +#include +#include #include +#ifdef HAVE_PATHS_H +# include +#endif +#include #include #include #include #include #include +#ifdef HAVE_UTIL_H +#include +#endif +#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) +# include +#endif #include "xmalloc.h" #include "ssh.h" @@ -37,13 +52,15 @@ #include "cipher.h" #include "pathnames.h" #include "log.h" -#include "key.h" +#include "sshkey.h" +#include "misc.h" #include "readconf.h" #include "match.h" -#include "misc.h" -#include "buffer.h" #include "kex.h" #include "mac.h" +#include "uidswap.h" +#include "myproposal.h" +#include "digest.h" /* Format of the configuration file: @@ -112,17 +129,18 @@ typedef enum { oBadOption, + oHost, oMatch, oForwardAgent, oForwardX11, oForwardX11Trusted, oForwardX11Timeout, oGatewayPorts, oExitOnForwardFailure, oPasswordAuthentication, oRSAAuthentication, oChallengeResponseAuthentication, oXAuthLocation, oIdentityFile, oHostName, oPort, oCipher, oRemoteForward, oLocalForward, - oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, + oUser, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand, oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts, oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression, oCompressionLevel, oTCPKeepAlive, oNumberOfPasswordPrompts, oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol, oMacs, - oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication, + oPubkeyAuthentication, oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias, oDynamicForward, oPreferredAuthentications, oHostbasedAuthentication, oHostKeyAlgorithms, oBindAddress, oPKCS11Provider, @@ -133,16 +151,20 @@ typedef enum { oSendEnv, oControlPath, oControlMaster, oControlPersist, oHashKnownHosts, oTunnel, oTunnelDevice, oLocalCommand, oPermitLocalCommand, - oVisualHostKey, oUseRoaming, oZeroKnowledgePasswordAuthentication, - oKexAlgorithms, oIPQoS, oRequestTTY, - - #ifdef WIN32_FIXME + oVisualHostKey, oUseRoaming, + oKexAlgorithms, oIPQoS, oRequestTTY, oIgnoreUnknown, oProxyUseFdpass, + oCanonicalDomains, oCanonicalizeHostname, oCanonicalizeMaxDots, + oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs, + oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys, + oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes, + oPubkeyAcceptedKeyTypes, + oIgnoredUnknownOption, +#ifdef WIN32_FIXME oPassInputHandle, oPassOutputHandle, - #endif - +#endif oDeprecated, oUnsupported } OpCodes; @@ -199,11 +221,12 @@ static struct { { "localforward", oLocalForward }, { "user", oUser }, { "host", oHost }, + { "match", oMatch }, { "escapechar", oEscapeChar }, { "globalknownhostsfile", oGlobalKnownHostsFile }, { "globalknownhostsfile2", oDeprecated }, { "userknownhostsfile", oUserKnownHostsFile }, - { "userknownhostsfile2", oDeprecated }, + { "userknownhostsfile2", oDeprecated }, { "connectionattempts", oConnectionAttempts }, { "batchmode", oBatchMode }, { "checkhostip", oCheckHostIP }, @@ -245,23 +268,29 @@ static struct { { "permitlocalcommand", oPermitLocalCommand }, { "visualhostkey", oVisualHostKey }, { "useroaming", oUseRoaming }, -#ifdef JPAKE - { "zeroknowledgepasswordauthentication", - oZeroKnowledgePasswordAuthentication }, -#else - { "zeroknowledgepasswordauthentication", oUnsupported }, -#endif { "kexalgorithms", oKexAlgorithms }, { "ipqos", oIPQoS }, { "requesttty", oRequestTTY }, - - #ifdef WIN32_FIXME + { "proxyusefdpass", oProxyUseFdpass }, + { "canonicaldomains", oCanonicalDomains }, + { "canonicalizefallbacklocal", oCanonicalizeFallbackLocal }, + { "canonicalizehostname", oCanonicalizeHostname }, + { "canonicalizemaxdots", oCanonicalizeMaxDots }, + { "canonicalizepermittedcnames", oCanonicalizePermittedCNAMEs }, + { "streamlocalbindmask", oStreamLocalBindMask }, + { "streamlocalbindunlink", oStreamLocalBindUnlink }, + { "revokedhostkeys", oRevokedHostKeys }, + { "fingerprinthash", oFingerprintHash }, + { "updatehostkeys", oUpdateHostkeys }, + { "hostbasedkeytypes", oHostbasedKeyTypes }, + { "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes }, + { "ignoreunknown", oIgnoreUnknown }, +#ifdef WIN32_FIXME {"passinputhandle", oPassInputHandle}, {"passoutputhandle", oPassOutputHandle}, - #endif - +#endif { NULL, oBadOption } }; @@ -271,23 +300,26 @@ static struct { */ void -add_local_forward(Options *options, const Forward *newfwd) +add_local_forward(Options *options, const struct Forward *newfwd) { - Forward *fwd; + struct Forward *fwd; #ifndef NO_IPPORT_RESERVED_CONCEPT extern uid_t original_real_uid; - if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0) + if (newfwd->listen_port < IPPORT_RESERVED && original_real_uid != 0 && + newfwd->listen_path == NULL) fatal("Privileged ports can only be forwarded by root."); #endif - options->local_forwards = xrealloc(options->local_forwards, + options->local_forwards = xreallocarray(options->local_forwards, options->num_local_forwards + 1, sizeof(*options->local_forwards)); fwd = &options->local_forwards[options->num_local_forwards++]; fwd->listen_host = newfwd->listen_host; fwd->listen_port = newfwd->listen_port; + fwd->listen_path = newfwd->listen_path; fwd->connect_host = newfwd->connect_host; fwd->connect_port = newfwd->connect_port; + fwd->connect_path = newfwd->connect_path; } /* @@ -296,19 +328,22 @@ add_local_forward(Options *options, const Forward *newfwd) */ void -add_remote_forward(Options *options, const Forward *newfwd) +add_remote_forward(Options *options, const struct Forward *newfwd) { - Forward *fwd; + struct Forward *fwd; - options->remote_forwards = xrealloc(options->remote_forwards, + options->remote_forwards = xreallocarray(options->remote_forwards, options->num_remote_forwards + 1, sizeof(*options->remote_forwards)); fwd = &options->remote_forwards[options->num_remote_forwards++]; fwd->listen_host = newfwd->listen_host; fwd->listen_port = newfwd->listen_port; + fwd->listen_path = newfwd->listen_path; fwd->connect_host = newfwd->connect_host; fwd->connect_port = newfwd->connect_port; + fwd->connect_path = newfwd->connect_path; + fwd->handle = newfwd->handle; fwd->allocated_port = 0; } @@ -318,68 +353,437 @@ clear_forwardings(Options *options) int i; for (i = 0; i < options->num_local_forwards; i++) { - if (options->local_forwards[i].listen_host != NULL) - xfree(options->local_forwards[i].listen_host); - xfree(options->local_forwards[i].connect_host); + free(options->local_forwards[i].listen_host); + free(options->local_forwards[i].listen_path); + free(options->local_forwards[i].connect_host); + free(options->local_forwards[i].connect_path); } if (options->num_local_forwards > 0) { - xfree(options->local_forwards); + free(options->local_forwards); options->local_forwards = NULL; } options->num_local_forwards = 0; for (i = 0; i < options->num_remote_forwards; i++) { - if (options->remote_forwards[i].listen_host != NULL) - xfree(options->remote_forwards[i].listen_host); - xfree(options->remote_forwards[i].connect_host); + free(options->remote_forwards[i].listen_host); + free(options->remote_forwards[i].listen_path); + free(options->remote_forwards[i].connect_host); + free(options->remote_forwards[i].connect_path); } if (options->num_remote_forwards > 0) { - xfree(options->remote_forwards); + free(options->remote_forwards); options->remote_forwards = NULL; } options->num_remote_forwards = 0; options->tun_open = SSH_TUNMODE_NO; } +void +add_identity_file(Options *options, const char *dir, const char *filename, + int userprovided) +{ + char *path; + int i; + + if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES) + fatal("Too many identity files specified (max %d)", + SSH_MAX_IDENTITY_FILES); + + if (dir == NULL) /* no dir, filename is absolute */ + path = xstrdup(filename); + else + (void)xasprintf(&path, "%.100s%.100s", dir, filename); + + /* Avoid registering duplicates */ + for (i = 0; i < options->num_identity_files; i++) { + if (options->identity_file_userprovided[i] == userprovided && + strcmp(options->identity_files[i], path) == 0) { + debug2("%s: ignoring duplicate key %s", __func__, path); + free(path); + return; + } + } + + options->identity_file_userprovided[options->num_identity_files] = + userprovided; + options->identity_files[options->num_identity_files++] = path; +} + +int +default_ssh_port(void) +{ + static int port; + struct servent *sp; + + if (port == 0) { + sp = getservbyname(SSH_SERVICE_NAME, "tcp"); + port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT; + } + return port; +} + +/* + * Execute a command in a shell. + * Return its exit status or -1 on abnormal exit. + */ +static int +execute_in_shell(const char *cmd) +{ + #ifdef WIN32_FIXME + // PRAGMA:TODO + logit("==>> execute_in_shell()"); + return 0; + #else + char *shell, *command_string; + pid_t pid; + int devnull, status; + extern uid_t original_real_uid; + + if ((shell = getenv("SHELL")) == NULL) + shell = _PATH_BSHELL; + + /* + * Use "exec" to avoid "sh -c" processes on some platforms + * (e.g. Solaris) + */ + xasprintf(&command_string, "exec %s", cmd); + + /* Need this to redirect subprocess stdin/out */ + if ((devnull = open(_PATH_DEVNULL, O_RDWR)) == -1) + fatal("open(/dev/null): %s", strerror(errno)); + + debug("Executing command: '%.500s'", cmd); + + /* Fork and execute the command. */ + if ((pid = fork()) == 0) { + char *argv[4]; + + /* Child. Permanently give up superuser privileges. */ + permanently_drop_suid(original_real_uid); + + /* Redirect child stdin and stdout. Leave stderr */ + if (dup2(devnull, STDIN_FILENO) == -1) + fatal("dup2: %s", strerror(errno)); + if (dup2(devnull, STDOUT_FILENO) == -1) + fatal("dup2: %s", strerror(errno)); + if (devnull > STDERR_FILENO) + close(devnull); + closefrom(STDERR_FILENO + 1); + + argv[0] = shell; + argv[1] = "-c"; + argv[2] = command_string; + argv[3] = NULL; + + execv(argv[0], argv); + error("Unable to execute '%.100s': %s", cmd, strerror(errno)); + /* Die with signal to make this error apparent to parent. */ + signal(SIGTERM, SIG_DFL); + kill(getpid(), SIGTERM); + _exit(1); + } + /* Parent. */ + if (pid < 0) + fatal("%s: fork: %.100s", __func__, strerror(errno)); + + close(devnull); + free(command_string); + + while (waitpid(pid, &status, 0) == -1) { + if (errno != EINTR && errno != EAGAIN) + fatal("%s: waitpid: %s", __func__, strerror(errno)); + } + if (!WIFEXITED(status)) { + error("command '%.100s' exited abnormally", cmd); + return -1; + } + debug3("command returned status %d", WEXITSTATUS(status)); + return WEXITSTATUS(status); + #endif +} + +/* + * Parse and execute a Match directive. + */ +static int +match_cfg_line(Options *options, char **condition, struct passwd *pw, + const char *host_arg, const char *original_host, int post_canon, + const char *filename, int linenum) +{ + char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria; + const char *ruser; + int r, port, this_result, result = 1, attributes = 0, negate; + char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV]; + + /* + * Configuration is likely to be incomplete at this point so we + * must be prepared to use default values. + */ + port = options->port <= 0 ? default_ssh_port() : options->port; + ruser = options->user == NULL ? pw->pw_name : options->user; + if (options->hostname != NULL) { + /* NB. Please keep in sync with ssh.c:main() */ + host = percent_expand(options->hostname, + "h", host_arg, (char *)NULL); + } else + host = xstrdup(host_arg); + + debug2("checking match for '%s' host %s originally %s", + cp, host, original_host); + while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') { + criteria = NULL; + this_result = 1; + if ((negate = attrib[0] == '!')) + attrib++; + /* criteria "all" and "canonical" have no argument */ + if (strcasecmp(attrib, "all") == 0) { + if (attributes > 1 || + ((arg = strdelim(&cp)) != NULL && *arg != '\0')) { + error("%.200s line %d: '%s' cannot be combined " + "with other Match attributes", + filename, linenum, oattrib); + result = -1; + goto out; + } + if (result) + result = negate ? 0 : 1; + goto out; + } + attributes++; + if (strcasecmp(attrib, "canonical") == 0) { + r = !!post_canon; /* force bitmask member to boolean */ + if (r == (negate ? 1 : 0)) + this_result = result = 0; + debug3("%.200s line %d: %smatched '%s'", + filename, linenum, + this_result ? "" : "not ", oattrib); + continue; + } + /* All other criteria require an argument */ + if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { + error("Missing Match criteria for %s", attrib); + result = -1; + goto out; + } + if (strcasecmp(attrib, "host") == 0) { + criteria = xstrdup(host); + r = match_hostname(host, arg) == 1; + if (r == (negate ? 1 : 0)) + this_result = result = 0; + } else if (strcasecmp(attrib, "originalhost") == 0) { + criteria = xstrdup(original_host); + r = match_hostname(original_host, arg) == 1; + if (r == (negate ? 1 : 0)) + this_result = result = 0; + } else if (strcasecmp(attrib, "user") == 0) { + criteria = xstrdup(ruser); + r = match_pattern_list(ruser, arg, 0) == 1; + if (r == (negate ? 1 : 0)) + this_result = result = 0; + } else if (strcasecmp(attrib, "localuser") == 0) { + criteria = xstrdup(pw->pw_name); + r = match_pattern_list(pw->pw_name, arg, 0) == 1; + if (r == (negate ? 1 : 0)) + this_result = result = 0; + } else if (strcasecmp(attrib, "exec") == 0) { + if (gethostname(thishost, sizeof(thishost)) == -1) + fatal("gethostname: %s", strerror(errno)); + strlcpy(shorthost, thishost, sizeof(shorthost)); + shorthost[strcspn(thishost, ".")] = '\0'; + snprintf(portstr, sizeof(portstr), "%d", port); + + cmd = percent_expand(arg, + "L", shorthost, + "d", pw->pw_dir, + "h", host, + "l", thishost, + "n", original_host, + "p", portstr, + "r", ruser, + "u", pw->pw_name, + (char *)NULL); + if (result != 1) { + /* skip execution if prior predicate failed */ + debug3("%.200s line %d: skipped exec " + "\"%.100s\"", filename, linenum, cmd); + free(cmd); + continue; + } + r = execute_in_shell(cmd); + if (r == -1) { + fatal("%.200s line %d: match exec " + "'%.100s' error", filename, + linenum, cmd); + } + criteria = xstrdup(cmd); + free(cmd); + /* Force exit status to boolean */ + r = r == 0; + if (r == (negate ? 1 : 0)) + this_result = result = 0; + } else { + error("Unsupported Match attribute %s", attrib); + result = -1; + goto out; + } + debug3("%.200s line %d: %smatched '%s \"%.100s\"' ", + filename, linenum, this_result ? "": "not ", + oattrib, criteria); + free(criteria); + } + if (attributes == 0) { + error("One or more attributes required for Match"); + result = -1; + goto out; + } + out: + if (result != -1) + debug2("match %sfound", result ? "" : "not "); + *condition = cp; + free(host); + return result; +} + +/* Check and prepare a domain name: removes trailing '.' and lowercases */ +static void +valid_domain(char *name, const char *filename, int linenum) +{ + size_t i, l = strlen(name); + u_char c, last = '\0'; + + if (l == 0) + fatal("%s line %d: empty hostname suffix", filename, linenum); + if (!isalpha((u_char)name[0]) && !isdigit((u_char)name[0])) + fatal("%s line %d: hostname suffix \"%.100s\" " + "starts with invalid character", filename, linenum, name); + for (i = 0; i < l; i++) { + c = tolower((u_char)name[i]); + name[i] = (char)c; + if (last == '.' && c == '.') + fatal("%s line %d: hostname suffix \"%.100s\" contains " + "consecutive separators", filename, linenum, name); + if (c != '.' && c != '-' && !isalnum(c) && + c != '_') /* technically invalid, but common */ + fatal("%s line %d: hostname suffix \"%.100s\" contains " + "invalid characters", filename, linenum, name); + last = c; + } + if (name[l - 1] == '.') + name[l - 1] = '\0'; +} + /* * Returns the number of the token pointed to by cp or oBadOption. */ - static OpCodes -parse_token(const char *cp, const char *filename, int linenum) +parse_token(const char *cp, const char *filename, int linenum, + const char *ignored_unknown) { - u_int i; + int i; for (i = 0; keywords[i].name; i++) - if (strcasecmp(cp, keywords[i].name) == 0) + if (strcmp(cp, keywords[i].name) == 0) return keywords[i].opcode; - + if (ignored_unknown != NULL && + match_pattern_list(cp, ignored_unknown, 1) == 1) + return oIgnoredUnknownOption; error("%s: line %d: Bad configuration option: %s", filename, linenum, cp); return oBadOption; } +/* Multistate option parsing */ +struct multistate { + char *key; + int value; +}; +static const struct multistate multistate_flag[] = { + { "true", 1 }, + { "false", 0 }, + { "yes", 1 }, + { "no", 0 }, + { NULL, -1 } +}; +static const struct multistate multistate_yesnoask[] = { + { "true", 1 }, + { "false", 0 }, + { "yes", 1 }, + { "no", 0 }, + { "ask", 2 }, + { NULL, -1 } +}; +static const struct multistate multistate_addressfamily[] = { + { "inet", AF_INET }, + { "inet6", AF_INET6 }, + { "any", AF_UNSPEC }, + { NULL, -1 } +}; +static const struct multistate multistate_controlmaster[] = { + { "true", SSHCTL_MASTER_YES }, + { "yes", SSHCTL_MASTER_YES }, + { "false", SSHCTL_MASTER_NO }, + { "no", SSHCTL_MASTER_NO }, + { "auto", SSHCTL_MASTER_AUTO }, + { "ask", SSHCTL_MASTER_ASK }, + { "autoask", SSHCTL_MASTER_AUTO_ASK }, + { NULL, -1 } +}; +static const struct multistate multistate_tunnel[] = { + { "ethernet", SSH_TUNMODE_ETHERNET }, + { "point-to-point", SSH_TUNMODE_POINTOPOINT }, + { "true", SSH_TUNMODE_DEFAULT }, + { "yes", SSH_TUNMODE_DEFAULT }, + { "false", SSH_TUNMODE_NO }, + { "no", SSH_TUNMODE_NO }, + { NULL, -1 } +}; +static const struct multistate multistate_requesttty[] = { + { "true", REQUEST_TTY_YES }, + { "yes", REQUEST_TTY_YES }, + { "false", REQUEST_TTY_NO }, + { "no", REQUEST_TTY_NO }, + { "force", REQUEST_TTY_FORCE }, + { "auto", REQUEST_TTY_AUTO }, + { NULL, -1 } +}; +static const struct multistate multistate_canonicalizehostname[] = { + { "true", SSH_CANONICALISE_YES }, + { "false", SSH_CANONICALISE_NO }, + { "yes", SSH_CANONICALISE_YES }, + { "no", SSH_CANONICALISE_NO }, + { "always", SSH_CANONICALISE_ALWAYS }, + { NULL, -1 } +}; + /* * Processes a single option line as used in the configuration files. This * only sets those values that have not already been set. */ #define WHITESPACE " \t\r\n" - int -process_config_line(Options *options, const char *host, - char *line, const char *filename, int linenum, - int *activep) +process_config_line(Options *options, struct passwd *pw, const char *host, + const char *original_host, char *line, const char *filename, + int linenum, int *activep, int flags) { char *s, **charptr, *endofnumber, *keyword, *arg, *arg2; char **cpptr, fwdarg[256]; - u_int *uintptr, max_entries = 0; - int negated, opcode, *intptr, value, value2, scale; + u_int i, *uintptr, max_entries = 0; + int negated, opcode, *intptr, value, value2, cmdline = 0; LogLevel *log_level_ptr; - long long orig, val64; + long long val64; size_t len; - Forward fwd; + struct Forward fwd; + const struct multistate *multistate_ptr; + struct allowed_cname *cname; + + if (activep == NULL) { /* We are processing a command line directive */ + cmdline = 1; + activep = &cmdline; + } /* Strip trailing whitespace */ - for (len = strlen(line) - 1; len > 0; len--) { + if ((len = strlen(line)) == 0) + return 0; + for (len--; len > 0; len--) { if (strchr(WHITESPACE, line[len]) == NULL) break; line[len] = '\0'; @@ -394,14 +798,21 @@ process_config_line(Options *options, const char *host, keyword = strdelim(&s); if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#') return 0; + /* Match lowercase keyword */ + lowercase(keyword); - opcode = parse_token(keyword, filename, linenum); + opcode = parse_token(keyword, filename, linenum, + options->ignored_unknown); switch (opcode) { case oBadOption: /* don't panic, but count bad options */ return -1; /* NOTREACHED */ + case oIgnoredUnknownOption: + debug("%s line %d: Ignored unknown option \"%s\"", + filename, linenum, keyword); + return 0; case oConnectTimeout: intptr = &options->connection_timeout; parse_time: @@ -409,7 +820,9 @@ parse_time: if (!arg || *arg == '\0') fatal("%s line %d: missing time value.", filename, linenum); - if ((value = convtime(arg)) == -1) + if (strcmp(arg, "none") == 0) + value = -1; + else if ((value = convtime(arg)) == -1) fatal("%s line %d: invalid time value.", filename, linenum); if (*activep && *intptr == -1) @@ -418,17 +831,23 @@ parse_time: case oForwardAgent: intptr = &options->forward_agent; -parse_flag: + parse_flag: + multistate_ptr = multistate_flag; + parse_multistate: arg = strdelim(&s); if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing yes/no argument.", filename, linenum); - value = 0; /* To avoid compiler warning... */ - if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) - value = 1; - else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) - value = 0; - else - fatal("%.200s line %d: Bad yes/no argument.", filename, linenum); + fatal("%s line %d: missing argument.", + filename, linenum); + value = -1; + for (i = 0; multistate_ptr[i].key != NULL; i++) { + if (strcasecmp(arg, multistate_ptr[i].key) == 0) { + value = multistate_ptr[i].value; + break; + } + } + if (value == -1) + fatal("%s line %d: unsupported option \"%s\".", + filename, linenum, arg); if (*activep && *intptr == -1) *intptr = value; break; @@ -440,13 +859,13 @@ parse_flag: case oForwardX11Trusted: intptr = &options->forward_x11_trusted; goto parse_flag; - + case oForwardX11Timeout: intptr = &options->forward_x11_timeout; goto parse_time; case oGatewayPorts: - intptr = &options->gateway_ports; + intptr = &options->fwd_opts.gateway_ports; goto parse_flag; case oExitOnForwardFailure: @@ -461,10 +880,6 @@ parse_flag: intptr = &options->password_authentication; goto parse_flag; - case oZeroKnowledgePasswordAuthentication: - intptr = &options->zero_knowledge_password_authentication; - goto parse_flag; - case oKbdInteractiveAuthentication: intptr = &options->kbd_interactive_authentication; goto parse_flag; @@ -511,27 +926,13 @@ parse_flag: case oVerifyHostKeyDNS: intptr = &options->verify_host_key_dns; - goto parse_yesnoask; + multistate_ptr = multistate_yesnoask; + goto parse_multistate; case oStrictHostKeyChecking: intptr = &options->strict_host_key_checking; -parse_yesnoask: - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing yes/no/ask argument.", - filename, linenum); - value = 0; /* To avoid compiler warning... */ - if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) - value = 1; - else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) - value = 0; - else if (strcmp(arg, "ask") == 0) - value = 2; - else - fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum); - if (*activep && *intptr == -1) - *intptr = value; - break; + multistate_ptr = multistate_yesnoask; + goto parse_multistate; case oCompression: intptr = &options->compression; @@ -556,39 +957,32 @@ parse_yesnoask: case oRekeyLimit: arg = strdelim(&s); if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing argument.", filename, linenum); - if (arg[0] < '0' || arg[0] > '9') - fatal("%.200s line %d: Bad number.", filename, linenum); - orig = val64 = strtoll(arg, &endofnumber, 10); - if (arg == endofnumber) - fatal("%.200s line %d: Bad number.", filename, linenum); - switch (toupper(*endofnumber)) { - case '\0': - scale = 1; - break; - case 'K': - scale = 1<<10; - break; - case 'M': - scale = 1<<20; - break; - case 'G': - scale = 1<<30; - break; - default: - fatal("%.200s line %d: Invalid RekeyLimit suffix", - filename, linenum); + fatal("%.200s line %d: Missing argument.", filename, + linenum); + if (strcmp(arg, "default") == 0) { + val64 = 0; + } else { + if (scan_scaled(arg, &val64) == -1) + fatal("%.200s line %d: Bad number '%s': %s", + filename, linenum, arg, strerror(errno)); + /* check for too-large or too-small limits */ + if (val64 > UINT_MAX) + fatal("%.200s line %d: RekeyLimit too large", + filename, linenum); + if (val64 != 0 && val64 < 16) + fatal("%.200s line %d: RekeyLimit too small", + filename, linenum); } - val64 *= scale; - /* detect integer wrap and too-large limits */ - if ((val64 / scale) != orig || val64 > UINT_MAX) - fatal("%.200s line %d: RekeyLimit too large", - filename, linenum); - if (val64 < 16) - fatal("%.200s line %d: RekeyLimit too small", - filename, linenum); if (*activep && options->rekey_limit == -1) options->rekey_limit = (u_int32_t)val64; + if (s != NULL) { /* optional rekey interval present */ + if (strcmp(s, "none") == 0) { + (void)strdelim(&s); /* discard */ + break; + } + intptr = &options->rekey_interval; + goto parse_time; + } break; case oIdentityFile: @@ -600,9 +994,8 @@ parse_yesnoask: if (*intptr >= SSH_MAX_IDENTITY_FILES) fatal("%.200s line %d: Too many identity files specified (max %d).", filename, linenum, SSH_MAX_IDENTITY_FILES); - charptr = &options->identity_files[*intptr]; - *charptr = xstrdup(arg); - *intptr = *intptr + 1; + add_identity_file(options, NULL, + arg, flags & SSHCONF_USERCONF); } break; @@ -711,7 +1104,7 @@ parse_int: arg = strdelim(&s); if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (!ciphers_valid(arg)) + if (!ciphers_valid(*arg == '+' ? arg + 1 : arg)) fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.", filename, linenum, arg ? arg : ""); if (*activep && options->ciphers == NULL) @@ -722,7 +1115,7 @@ parse_int: arg = strdelim(&s); if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (!mac_valid(arg)) + if (!mac_valid(*arg == '+' ? arg + 1 : arg)) fatal("%.200s line %d: Bad SSH2 Mac spec '%s'.", filename, linenum, arg ? arg : ""); if (*activep && options->macs == NULL) @@ -734,7 +1127,7 @@ parse_int: if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (!kex_names_valid(arg)) + if (!kex_names_valid(*arg == '+' ? arg + 1 : arg)) fatal("%.200s line %d: Bad SSH2 KexAlgorithms '%s'.", filename, linenum, arg ? arg : ""); if (*activep && options->kex_algorithms == NULL) @@ -742,14 +1135,17 @@ parse_int: break; case oHostKeyAlgorithms: + charptr = &options->hostkeyalgorithms; +parse_keytypes: arg = strdelim(&s); if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing argument.", filename, linenum); - if (!key_names_valid2(arg)) - fatal("%.200s line %d: Bad protocol 2 host key algorithms '%s'.", - filename, linenum, arg ? arg : ""); - if (*activep && options->hostkeyalgorithms == NULL) - options->hostkeyalgorithms = xstrdup(arg); + fatal("%.200s line %d: Missing argument.", + filename, linenum); + if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1)) + fatal("%s line %d: Bad key types '%s'.", + filename, linenum, arg ? arg : ""); + if (*activep && *charptr == NULL) + *charptr = xstrdup(arg); break; case oProtocol: @@ -817,6 +1213,9 @@ parse_int: goto parse_flag; case oHost: + if (cmdline) + fatal("Host directive not supported as a command-line " + "option"); *activep = 0; arg2 = NULL; while ((arg = strdelim(&s)) != NULL && *arg != '\0') { @@ -843,18 +1242,30 @@ parse_int: /* Avoid garbage check below, as strdelim is done. */ return 0; + case oMatch: + if (cmdline) + fatal("Host directive not supported as a command-line " + "option"); + value = match_cfg_line(options, &s, pw, host, original_host, + flags & SSHCONF_POSTCANON, filename, linenum); + if (value < 0) + fatal("%.200s line %d: Bad Match condition", filename, + linenum); + *activep = value; + break; + case oEscapeChar: intptr = &options->escape_char; arg = strdelim(&s); if (!arg || *arg == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); - if (arg[0] == '^' && arg[2] == 0 && + if (strcmp(arg, "none") == 0) + value = SSH_ESCAPECHAR_NONE; + else if (arg[1] == '\0') + value = (u_char) arg[0]; + else if (arg[0] == '^' && arg[2] == 0 && (u_char) arg[1] >= 64 && (u_char) arg[1] < 128) value = (u_char) arg[1] & 31; - else if (strlen(arg) == 1) - value = (u_char) arg[0]; - else if (strcmp(arg, "none") == 0) - value = SSH_ESCAPECHAR_NONE; else { fatal("%.200s line %d: Bad escape character.", filename, linenum); @@ -866,22 +1277,9 @@ parse_int: break; case oAddressFamily: - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%s line %d: missing address family.", - filename, linenum); intptr = &options->address_family; - if (strcasecmp(arg, "inet") == 0) - value = AF_INET; - else if (strcasecmp(arg, "inet6") == 0) - value = AF_INET6; - else if (strcasecmp(arg, "any") == 0) - value = AF_UNSPEC; - else - fatal("Unsupported AddressFamily \"%s\"", arg); - if (*activep && *intptr == -1) - *intptr = value; - break; + multistate_ptr = multistate_addressfamily; + goto parse_multistate; case oEnableSSHKeysign: intptr = &options->enable_ssh_keysign; @@ -920,27 +1318,8 @@ parse_int: case oControlMaster: intptr = &options->control_master; - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%.200s line %d: Missing ControlMaster argument.", - filename, linenum); - value = 0; /* To avoid compiler warning... */ - if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0) - value = SSHCTL_MASTER_YES; - else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0) - value = SSHCTL_MASTER_NO; - else if (strcmp(arg, "auto") == 0) - value = SSHCTL_MASTER_AUTO; - else if (strcmp(arg, "ask") == 0) - value = SSHCTL_MASTER_ASK; - else if (strcmp(arg, "autoask") == 0) - value = SSHCTL_MASTER_AUTO_ASK; - else - fatal("%.200s line %d: Bad ControlMaster argument.", - filename, linenum); - if (*activep && *intptr == -1) - *intptr = value; - break; + multistate_ptr = multistate_controlmaster; + goto parse_multistate; case oControlPersist: /* no/false/yes/true, or a time spec */ @@ -972,25 +1351,8 @@ parse_int: case oTunnel: intptr = &options->tun_open; - arg = strdelim(&s); - if (!arg || *arg == '\0') - fatal("%s line %d: Missing yes/point-to-point/" - "ethernet/no argument.", filename, linenum); - value = 0; /* silence compiler */ - if (strcasecmp(arg, "ethernet") == 0) - value = SSH_TUNMODE_ETHERNET; - else if (strcasecmp(arg, "point-to-point") == 0) - value = SSH_TUNMODE_POINTOPOINT; - else if (strcasecmp(arg, "yes") == 0) - value = SSH_TUNMODE_DEFAULT; - else if (strcasecmp(arg, "no") == 0) - value = SSH_TUNMODE_NO; - else - fatal("%s line %d: Bad yes/point-to-point/ethernet/" - "no argument: %s", filename, linenum, arg); - if (*activep) - *intptr = value; - break; + multistate_ptr = multistate_tunnel; + goto parse_multistate; case oTunnelDevice: arg = strdelim(&s); @@ -1039,26 +1401,120 @@ parse_int: goto parse_flag; case oRequestTTY: + intptr = &options->request_tty; + multistate_ptr = multistate_requesttty; + goto parse_multistate; + + case oIgnoreUnknown: + charptr = &options->ignored_unknown; + goto parse_string; + + case oProxyUseFdpass: + intptr = &options->proxy_use_fdpass; + goto parse_flag; + + case oCanonicalDomains: + value = options->num_canonical_domains != 0; + while ((arg = strdelim(&s)) != NULL && *arg != '\0') { + valid_domain(arg, filename, linenum); + if (!*activep || value) + continue; + if (options->num_canonical_domains >= MAX_CANON_DOMAINS) + fatal("%s line %d: too many hostname suffixes.", + filename, linenum); + options->canonical_domains[ + options->num_canonical_domains++] = xstrdup(arg); + } + break; + + case oCanonicalizePermittedCNAMEs: + value = options->num_permitted_cnames != 0; + while ((arg = strdelim(&s)) != NULL && *arg != '\0') { + /* Either '*' for everything or 'list:list' */ + if (strcmp(arg, "*") == 0) + arg2 = arg; + else { + lowercase(arg); + if ((arg2 = strchr(arg, ':')) == NULL || + arg2[1] == '\0') { + fatal("%s line %d: " + "Invalid permitted CNAME \"%s\"", + filename, linenum, arg); + } + *arg2 = '\0'; + arg2++; + } + if (!*activep || value) + continue; + if (options->num_permitted_cnames >= MAX_CANON_DOMAINS) + fatal("%s line %d: too many permitted CNAMEs.", + filename, linenum); + cname = options->permitted_cnames + + options->num_permitted_cnames++; + cname->source_list = xstrdup(arg); + cname->target_list = xstrdup(arg2); + } + break; + + case oCanonicalizeHostname: + intptr = &options->canonicalize_hostname; + multistate_ptr = multistate_canonicalizehostname; + goto parse_multistate; + + case oCanonicalizeMaxDots: + intptr = &options->canonicalize_max_dots; + goto parse_int; + + case oCanonicalizeFallbackLocal: + intptr = &options->canonicalize_fallback_local; + goto parse_flag; + + case oStreamLocalBindMask: arg = strdelim(&s); if (!arg || *arg == '\0') - fatal("%s line %d: missing argument.", + fatal("%.200s line %d: Missing StreamLocalBindMask argument.", filename, linenum); + /* Parse mode in octal format */ + value = strtol(arg, &endofnumber, 8); + if (arg == endofnumber || value < 0 || value > 0777) + fatal("%.200s line %d: Bad mask.", filename, linenum); + options->fwd_opts.streamlocal_bind_mask = (mode_t)value; + break; + + case oStreamLocalBindUnlink: + intptr = &options->fwd_opts.streamlocal_bind_unlink; + goto parse_flag; + + case oRevokedHostKeys: + charptr = &options->revoked_host_keys; + goto parse_string; + + case oFingerprintHash: + intptr = &options->fingerprint_hash; + arg = strdelim(&s); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", filename, linenum); - intptr = &options->request_tty; - if (strcasecmp(arg, "yes") == 0) - value = REQUEST_TTY_YES; - else if (strcasecmp(arg, "no") == 0) - value = REQUEST_TTY_NO; - else if (strcasecmp(arg, "force") == 0) - value = REQUEST_TTY_FORCE; - else if (strcasecmp(arg, "auto") == 0) - value = REQUEST_TTY_AUTO; - else - fatal("Unsupported RequestTTY \"%s\"", arg); + if ((value = ssh_digest_alg_by_name(arg)) == -1) + fatal("%.200s line %d: Invalid hash algorithm \"%s\".", + filename, linenum, arg); if (*activep && *intptr == -1) *intptr = value; break; - #ifdef WIN32_FIXME + case oUpdateHostkeys: + intptr = &options->update_hostkeys; + multistate_ptr = multistate_yesnoask; + goto parse_multistate; + + case oHostbasedKeyTypes: + charptr = &options->hostbased_key_types; + goto parse_keytypes; + + case oPubkeyAcceptedKeyTypes: + charptr = &options->pubkey_key_types; + goto parse_keytypes; + +#ifdef WIN32_FIXME case oPassInputHandle: { @@ -1078,7 +1534,7 @@ parse_int: break; } - #endif +#endif case oDeprecated: debug("%s line %d: Deprecated option \"%s\"", @@ -1091,7 +1547,7 @@ parse_int: return 0; default: - fatal("process_config_line: Unimplemented opcode %d", opcode); + fatal("%s: Unimplemented opcode %d", __func__, opcode); } /* Check that there is no garbage at end of line. */ @@ -1110,8 +1566,8 @@ parse_int: */ int -read_config_file(const char *filename, const char *host, Options *options, - int checkperm) +read_config_file(const char *filename, struct passwd *pw, const char *host, + const char *original_host, Options *options, int flags) { FILE *f; char line[1024]; @@ -1121,11 +1577,12 @@ read_config_file(const char *filename, const char *host, Options *options, if ((f = fopen(filename, "r")) == NULL) return 0; - if (checkperm) { + if (flags & SSHCONF_CHECKPERM) { struct stat sb; if (fstat(fileno(f), &sb) == -1) fatal("fstat %s: %s", filename, strerror(errno)); + #ifndef WIN32_FIXME if (((sb.st_uid != 0 && sb.st_uid != getuid()) || (sb.st_mode & 022) != 0)) @@ -1144,7 +1601,8 @@ read_config_file(const char *filename, const char *host, Options *options, while (fgets(line, sizeof(line), f)) { /* Update line number counter. */ linenum++; - if (process_config_line(options, host, line, filename, linenum, &active) != 0) + if (process_config_line(options, pw, host, original_host, + line, filename, linenum, &active, flags) != 0) bad_options++; } fclose(f); @@ -1154,6 +1612,13 @@ read_config_file(const char *filename, const char *host, Options *options, return 1; } +/* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */ +int +option_clear_or_none(const char *o) +{ + return o == NULL || strcasecmp(o, "none") == 0; +} + /* * Initializes options to special values that indicate that they have not yet * been set. Read_config_file will only set options with this value. Options @@ -1171,7 +1636,9 @@ initialize_options(Options * options) options->forward_x11_timeout = -1; options->exit_on_forward_failure = -1; options->xauth_location = NULL; - options->gateway_ports = -1; + options->fwd_opts.gateway_ports = -1; + options->fwd_opts.streamlocal_bind_mask = (mode_t)-1; + options->fwd_opts.streamlocal_bind_unlink = -1; options->use_privileged_port = -1; options->rsa_authentication = -1; options->pubkey_authentication = -1; @@ -1221,6 +1688,7 @@ initialize_options(Options * options) options->no_host_authentication_for_localhost = - 1; options->identities_only = - 1; options->rekey_limit = - 1; + options->rekey_interval = -1; options->verify_host_key_dns = -1; options->server_alive_interval = -1; options->server_alive_count_max = -1; @@ -1237,11 +1705,22 @@ initialize_options(Options * options) options->permit_local_command = -1; options->use_roaming = -1; options->visual_host_key = -1; - options->zero_knowledge_password_authentication = -1; options->ip_qos_interactive = -1; options->ip_qos_bulk = -1; options->request_tty = -1; - + options->proxy_use_fdpass = -1; + options->ignored_unknown = NULL; + options->num_canonical_domains = 0; + options->num_permitted_cnames = 0; + options->canonicalize_max_dots = -1; + options->canonicalize_fallback_local = -1; + options->canonicalize_hostname = -1; + options->revoked_host_keys = NULL; + options->fingerprint_hash = -1; + options->update_hostkeys = -1; + options->hostbased_key_types = NULL; + options->pubkey_key_types = NULL; + #ifdef WIN32_FIXME options -> passInputHandle_ = NULL; @@ -1250,16 +1729,28 @@ initialize_options(Options * options) #endif } +/* + * A petite version of fill_default_options() that just fills the options + * needed for hostname canonicalization to proceed. + */ +void +fill_default_options_for_canonicalization(Options *options) +{ + if (options->canonicalize_max_dots == -1) + options->canonicalize_max_dots = 1; + if (options->canonicalize_fallback_local == -1) + options->canonicalize_fallback_local = 1; + if (options->canonicalize_hostname == -1) + options->canonicalize_hostname = SSH_CANONICALISE_NO; +} + /* * Called after processing other sources of option data, this fills those * options for which no value has been specified with their default values. */ - void fill_default_options(Options * options) { - int len; - if (options->forward_agent == -1) options->forward_agent = 0; if (options->forward_x11 == -1) @@ -1272,8 +1763,12 @@ fill_default_options(Options * options) options->exit_on_forward_failure = 0; if (options->xauth_location == NULL) options->xauth_location = _PATH_XAUTH; - if (options->gateway_ports == -1) - options->gateway_ports = 0; + if (options->fwd_opts.gateway_ports == -1) + options->fwd_opts.gateway_ports = 0; + if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1) + options->fwd_opts.streamlocal_bind_mask = 0177; + if (options->fwd_opts.streamlocal_bind_unlink == -1) + options->fwd_opts.streamlocal_bind_unlink = 0; if (options->use_privileged_port == -1) options->use_privileged_port = 0; if (options->rsa_authentication == -1) @@ -1317,39 +1812,25 @@ fill_default_options(Options * options) /* Selected in ssh_login(). */ if (options->cipher == -1) options->cipher = SSH_CIPHER_NOT_SET; - /* options->ciphers, default set in myproposals.h */ - /* options->macs, default set in myproposals.h */ - /* options->kex_algorithms, default set in myproposals.h */ /* options->hostkeyalgorithms, default set in myproposals.h */ if (options->protocol == SSH_PROTO_UNKNOWN) options->protocol = SSH_PROTO_2; if (options->num_identity_files == 0) { if (options->protocol & SSH_PROTO_1) { - len = 2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1; - options->identity_files[options->num_identity_files] = - xmalloc(len); - snprintf(options->identity_files[options->num_identity_files++], - len, "~/%.100s", _PATH_SSH_CLIENT_IDENTITY); + add_identity_file(options, "~/", + _PATH_SSH_CLIENT_IDENTITY, 0); } if (options->protocol & SSH_PROTO_2) { - len = 2 + strlen(_PATH_SSH_CLIENT_ID_RSA) + 1; - options->identity_files[options->num_identity_files] = - xmalloc(len); - snprintf(options->identity_files[options->num_identity_files++], - len, "~/%.100s", _PATH_SSH_CLIENT_ID_RSA); - - len = 2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1; - options->identity_files[options->num_identity_files] = - xmalloc(len); - snprintf(options->identity_files[options->num_identity_files++], - len, "~/%.100s", _PATH_SSH_CLIENT_ID_DSA); + add_identity_file(options, "~/", + _PATH_SSH_CLIENT_ID_RSA, 0); + add_identity_file(options, "~/", + _PATH_SSH_CLIENT_ID_DSA, 0); #ifdef OPENSSL_HAS_ECC - len = 2 + strlen(_PATH_SSH_CLIENT_ID_ECDSA) + 1; - options->identity_files[options->num_identity_files] = - xmalloc(len); - snprintf(options->identity_files[options->num_identity_files++], - len, "~/%.100s", _PATH_SSH_CLIENT_ID_ECDSA); + add_identity_file(options, "~/", + _PATH_SSH_CLIENT_ID_ECDSA, 0); #endif + add_identity_file(options, "~/", + _PATH_SSH_CLIENT_ID_ED25519, 0); } } if (options->escape_char == -1) @@ -1378,6 +1859,8 @@ fill_default_options(Options * options) options->enable_ssh_keysign = 0; if (options->rekey_limit == -1) options->rekey_limit = 0; + if (options->rekey_interval == -1) + options->rekey_interval = 0; if (options->verify_host_key_dns == -1) options->verify_host_key_dns = 0; if (options->server_alive_interval == -1) @@ -1404,116 +1887,555 @@ fill_default_options(Options * options) options->use_roaming = 1; if (options->visual_host_key == -1) options->visual_host_key = 0; - if (options->zero_knowledge_password_authentication == -1) - options->zero_knowledge_password_authentication = 0; if (options->ip_qos_interactive == -1) options->ip_qos_interactive = IPTOS_LOWDELAY; if (options->ip_qos_bulk == -1) options->ip_qos_bulk = IPTOS_THROUGHPUT; if (options->request_tty == -1) options->request_tty = REQUEST_TTY_AUTO; - /* options->local_command should not be set by default */ - /* options->proxy_command should not be set by default */ + if (options->proxy_use_fdpass == -1) + options->proxy_use_fdpass = 0; + if (options->canonicalize_max_dots == -1) + options->canonicalize_max_dots = 1; + if (options->canonicalize_fallback_local == -1) + options->canonicalize_fallback_local = 1; + if (options->canonicalize_hostname == -1) + options->canonicalize_hostname = SSH_CANONICALISE_NO; + if (options->fingerprint_hash == -1) + options->fingerprint_hash = SSH_FP_HASH_DEFAULT; + if (options->update_hostkeys == -1) + options->update_hostkeys = 0; + if (kex_assemble_names(KEX_CLIENT_ENCRYPT, &options->ciphers) != 0 || + kex_assemble_names(KEX_CLIENT_MAC, &options->macs) != 0 || + kex_assemble_names(KEX_CLIENT_KEX, &options->kex_algorithms) != 0 || + kex_assemble_names(KEX_DEFAULT_PK_ALG, + &options->hostbased_key_types) != 0 || + kex_assemble_names(KEX_DEFAULT_PK_ALG, + &options->pubkey_key_types) != 0) + fatal("%s: kex_assemble_names failed", __func__); + +#define CLEAR_ON_NONE(v) \ + do { \ + if (option_clear_or_none(v)) { \ + free(v); \ + v = NULL; \ + } \ + } while(0) + CLEAR_ON_NONE(options->local_command); + CLEAR_ON_NONE(options->proxy_command); + CLEAR_ON_NONE(options->control_path); + CLEAR_ON_NONE(options->revoked_host_keys); /* options->user will be set in the main program if appropriate */ /* options->hostname will be set in the main program if appropriate */ /* options->host_key_alias should not be set by default */ /* options->preferred_authentications will be set in ssh */ } +struct fwdarg { + char *arg; + int ispath; +}; + +/* + * parse_fwd_field + * parses the next field in a port forwarding specification. + * sets fwd to the parsed field and advances p past the colon + * or sets it to NULL at end of string. + * returns 0 on success, else non-zero. + */ +static int +parse_fwd_field(char **p, struct fwdarg *fwd) +{ + char *ep, *cp = *p; + int ispath = 0; + + if (*cp == '\0') { + *p = NULL; + return -1; /* end of string */ + } + + /* + * A field escaped with square brackets is used literally. + * XXX - allow ']' to be escaped via backslash? + */ + if (*cp == '[') { + /* find matching ']' */ + for (ep = cp + 1; *ep != ']' && *ep != '\0'; ep++) { + if (*ep == '/') + ispath = 1; + } + /* no matching ']' or not at end of field. */ + if (ep[0] != ']' || (ep[1] != ':' && ep[1] != '\0')) + return -1; + /* NUL terminate the field and advance p past the colon */ + *ep++ = '\0'; + if (*ep != '\0') + *ep++ = '\0'; + fwd->arg = cp + 1; + fwd->ispath = ispath; + *p = ep; + return 0; + } + + for (cp = *p; *cp != '\0'; cp++) { + switch (*cp) { + case '\\': + memmove(cp, cp + 1, strlen(cp + 1) + 1); + if (*cp == '\0') + return -1; + break; + case '/': + ispath = 1; + break; + case ':': + *cp++ = '\0'; + goto done; + } + } +done: + fwd->arg = *p; + fwd->ispath = ispath; + *p = cp; + return 0; +} + /* * parse_forward * parses a string containing a port forwarding specification of the form: * dynamicfwd == 0 - * [listenhost:]listenport:connecthost:connectport + * [listenhost:]listenport|listenpath:connecthost:connectport|connectpath + * listenpath:connectpath * dynamicfwd == 1 * [listenhost:]listenport * returns number of arguments parsed or zero on error */ int -parse_forward(Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd) +parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remotefwd) { + struct fwdarg fwdargs[4]; + char *p, *cp; int i; - char *p, *cp, *fwdarg[4]; - memset(fwd, '\0', sizeof(*fwd)); + memset(fwd, 0, sizeof(*fwd)); + memset(fwdargs, 0, sizeof(fwdargs)); cp = p = xstrdup(fwdspec); /* skip leading spaces */ - while (isspace(*cp)) + while (isspace((u_char)*cp)) cp++; - for (i = 0; i < 4; ++i) - if ((fwdarg[i] = hpdelim(&cp)) == NULL) + for (i = 0; i < 4; ++i) { + if (parse_fwd_field(&cp, &fwdargs[i]) != 0) break; + } /* Check for trailing garbage */ - if (cp != NULL) + if (cp != NULL && *cp != '\0') { i = 0; /* failure */ + } switch (i) { case 1: - fwd->listen_host = NULL; - fwd->listen_port = a2port(fwdarg[0]); + if (fwdargs[0].ispath) { + fwd->listen_path = xstrdup(fwdargs[0].arg); + fwd->listen_port = PORT_STREAMLOCAL; + } else { + fwd->listen_host = NULL; + fwd->listen_port = a2port(fwdargs[0].arg); + } fwd->connect_host = xstrdup("socks"); break; case 2: - fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); - fwd->listen_port = a2port(fwdarg[1]); - fwd->connect_host = xstrdup("socks"); + if (fwdargs[0].ispath && fwdargs[1].ispath) { + fwd->listen_path = xstrdup(fwdargs[0].arg); + fwd->listen_port = PORT_STREAMLOCAL; + fwd->connect_path = xstrdup(fwdargs[1].arg); + fwd->connect_port = PORT_STREAMLOCAL; + } else if (fwdargs[1].ispath) { + fwd->listen_host = NULL; + fwd->listen_port = a2port(fwdargs[0].arg); + fwd->connect_path = xstrdup(fwdargs[1].arg); + fwd->connect_port = PORT_STREAMLOCAL; + } else { + fwd->listen_host = xstrdup(fwdargs[0].arg); + fwd->listen_port = a2port(fwdargs[1].arg); + fwd->connect_host = xstrdup("socks"); + } break; case 3: - fwd->listen_host = NULL; - fwd->listen_port = a2port(fwdarg[0]); - fwd->connect_host = xstrdup(cleanhostname(fwdarg[1])); - fwd->connect_port = a2port(fwdarg[2]); + if (fwdargs[0].ispath) { + fwd->listen_path = xstrdup(fwdargs[0].arg); + fwd->listen_port = PORT_STREAMLOCAL; + fwd->connect_host = xstrdup(fwdargs[1].arg); + fwd->connect_port = a2port(fwdargs[2].arg); + } else if (fwdargs[2].ispath) { + fwd->listen_host = xstrdup(fwdargs[0].arg); + fwd->listen_port = a2port(fwdargs[1].arg); + fwd->connect_path = xstrdup(fwdargs[2].arg); + fwd->connect_port = PORT_STREAMLOCAL; + } else { + fwd->listen_host = NULL; + fwd->listen_port = a2port(fwdargs[0].arg); + fwd->connect_host = xstrdup(fwdargs[1].arg); + fwd->connect_port = a2port(fwdargs[2].arg); + } break; case 4: - fwd->listen_host = xstrdup(cleanhostname(fwdarg[0])); - fwd->listen_port = a2port(fwdarg[1]); - fwd->connect_host = xstrdup(cleanhostname(fwdarg[2])); - fwd->connect_port = a2port(fwdarg[3]); + fwd->listen_host = xstrdup(fwdargs[0].arg); + fwd->listen_port = a2port(fwdargs[1].arg); + fwd->connect_host = xstrdup(fwdargs[2].arg); + fwd->connect_port = a2port(fwdargs[3].arg); break; default: i = 0; /* failure */ } - xfree(p); + free(p); if (dynamicfwd) { if (!(i == 1 || i == 2)) goto fail_free; } else { - if (!(i == 3 || i == 4)) - goto fail_free; - if (fwd->connect_port <= 0) + if (!(i == 3 || i == 4)) { + if (fwd->connect_path == NULL && + fwd->listen_path == NULL) + goto fail_free; + } + if (fwd->connect_port <= 0 && fwd->connect_path == NULL) goto fail_free; } - if (fwd->listen_port < 0 || (!remotefwd && fwd->listen_port == 0)) + if ((fwd->listen_port < 0 && fwd->listen_path == NULL) || + (!remotefwd && fwd->listen_port == 0)) goto fail_free; - if (fwd->connect_host != NULL && strlen(fwd->connect_host) >= NI_MAXHOST) goto fail_free; + /* XXX - if connecting to a remote socket, max sun len may not match this host */ + if (fwd->connect_path != NULL && + strlen(fwd->connect_path) >= PATH_MAX_SUN) + goto fail_free; if (fwd->listen_host != NULL && strlen(fwd->listen_host) >= NI_MAXHOST) goto fail_free; - + if (fwd->listen_path != NULL && + strlen(fwd->listen_path) >= PATH_MAX_SUN) + goto fail_free; return (i); fail_free: - if (fwd->connect_host != NULL) { - xfree(fwd->connect_host); - fwd->connect_host = NULL; - } - if (fwd->listen_host != NULL) { - xfree(fwd->listen_host); - fwd->listen_host = NULL; - } + free(fwd->connect_host); + fwd->connect_host = NULL; + free(fwd->connect_path); + fwd->connect_path = NULL; + free(fwd->listen_host); + fwd->listen_host = NULL; + free(fwd->listen_path); + fwd->listen_path = NULL; return (0); } + +/* XXX the following is a near-vebatim copy from servconf.c; refactor */ +static const char * +fmt_multistate_int(int val, const struct multistate *m) +{ + u_int i; + + for (i = 0; m[i].key != NULL; i++) { + if (m[i].value == val) + return m[i].key; + } + return "UNKNOWN"; +} + +static const char * +fmt_intarg(OpCodes code, int val) +{ + if (val == -1) + return "unset"; + switch (code) { + case oAddressFamily: + return fmt_multistate_int(val, multistate_addressfamily); + case oVerifyHostKeyDNS: + case oStrictHostKeyChecking: + case oUpdateHostkeys: + return fmt_multistate_int(val, multistate_yesnoask); + case oControlMaster: + return fmt_multistate_int(val, multistate_controlmaster); + case oTunnel: + return fmt_multistate_int(val, multistate_tunnel); + case oRequestTTY: + return fmt_multistate_int(val, multistate_requesttty); + case oCanonicalizeHostname: + return fmt_multistate_int(val, multistate_canonicalizehostname); + case oFingerprintHash: + return ssh_digest_alg_name(val); + case oProtocol: + switch (val) { + case SSH_PROTO_1: + return "1"; + case SSH_PROTO_2: + return "2"; + case (SSH_PROTO_1|SSH_PROTO_2): + return "2,1"; + default: + return "UNKNOWN"; + } + default: + switch (val) { + case 0: + return "no"; + case 1: + return "yes"; + default: + return "UNKNOWN"; + } + } +} + +static const char * +lookup_opcode_name(OpCodes code) +{ + u_int i; + + for (i = 0; keywords[i].name != NULL; i++) + if (keywords[i].opcode == code) + return(keywords[i].name); + return "UNKNOWN"; +} + +static void +dump_cfg_int(OpCodes code, int val) +{ + printf("%s %d\n", lookup_opcode_name(code), val); +} + +static void +dump_cfg_fmtint(OpCodes code, int val) +{ + printf("%s %s\n", lookup_opcode_name(code), fmt_intarg(code, val)); +} + +static void +dump_cfg_string(OpCodes code, const char *val) +{ + if (val == NULL) + return; + printf("%s %s\n", lookup_opcode_name(code), val); +} + +static void +dump_cfg_strarray(OpCodes code, u_int count, char **vals) +{ + u_int i; + + for (i = 0; i < count; i++) + printf("%s %s\n", lookup_opcode_name(code), vals[i]); +} + +static void +dump_cfg_strarray_oneline(OpCodes code, u_int count, char **vals) +{ + u_int i; + + printf("%s", lookup_opcode_name(code)); + for (i = 0; i < count; i++) + printf(" %s", vals[i]); + printf("\n"); +} + +static void +dump_cfg_forwards(OpCodes code, u_int count, const struct Forward *fwds) +{ + const struct Forward *fwd; + u_int i; + + /* oDynamicForward */ + for (i = 0; i < count; i++) { + fwd = &fwds[i]; + if (code == oDynamicForward && + strcmp(fwd->connect_host, "socks") != 0) + continue; + if (code == oLocalForward && + strcmp(fwd->connect_host, "socks") == 0) + continue; + printf("%s", lookup_opcode_name(code)); + if (fwd->listen_port == PORT_STREAMLOCAL) + printf(" %s", fwd->listen_path); + else if (fwd->listen_host == NULL) + printf(" %d", fwd->listen_port); + else { + printf(" [%s]:%d", + fwd->listen_host, fwd->listen_port); + } + if (code != oDynamicForward) { + if (fwd->connect_port == PORT_STREAMLOCAL) + printf(" %s", fwd->connect_path); + else if (fwd->connect_host == NULL) + printf(" %d", fwd->connect_port); + else { + printf(" [%s]:%d", + fwd->connect_host, fwd->connect_port); + } + } + printf("\n"); + } +} + +void +dump_client_config(Options *o, const char *host) +{ + int i; + char vbuf[5]; + + /* Most interesting options first: user, host, port */ + dump_cfg_string(oUser, o->user); + dump_cfg_string(oHostName, host); + dump_cfg_int(oPort, o->port); + + /* Flag options */ + dump_cfg_fmtint(oAddressFamily, o->address_family); + dump_cfg_fmtint(oBatchMode, o->batch_mode); + dump_cfg_fmtint(oCanonicalizeFallbackLocal, o->canonicalize_fallback_local); + dump_cfg_fmtint(oCanonicalizeHostname, o->canonicalize_hostname); + dump_cfg_fmtint(oChallengeResponseAuthentication, o->challenge_response_authentication); + dump_cfg_fmtint(oCheckHostIP, o->check_host_ip); + dump_cfg_fmtint(oCompression, o->compression); + dump_cfg_fmtint(oControlMaster, o->control_master); + dump_cfg_fmtint(oEnableSSHKeysign, o->enable_ssh_keysign); + dump_cfg_fmtint(oExitOnForwardFailure, o->exit_on_forward_failure); + dump_cfg_fmtint(oFingerprintHash, o->fingerprint_hash); + dump_cfg_fmtint(oForwardAgent, o->forward_agent); + dump_cfg_fmtint(oForwardX11, o->forward_x11); + dump_cfg_fmtint(oForwardX11Trusted, o->forward_x11_trusted); + dump_cfg_fmtint(oGatewayPorts, o->fwd_opts.gateway_ports); +#ifdef GSSAPI + dump_cfg_fmtint(oGssAuthentication, o->gss_authentication); + dump_cfg_fmtint(oGssDelegateCreds, o->gss_deleg_creds); +#endif /* GSSAPI */ + dump_cfg_fmtint(oHashKnownHosts, o->hash_known_hosts); + dump_cfg_fmtint(oHostbasedAuthentication, o->hostbased_authentication); + dump_cfg_fmtint(oIdentitiesOnly, o->identities_only); + dump_cfg_fmtint(oKbdInteractiveAuthentication, o->kbd_interactive_authentication); + dump_cfg_fmtint(oNoHostAuthenticationForLocalhost, o->no_host_authentication_for_localhost); + dump_cfg_fmtint(oPasswordAuthentication, o->password_authentication); + dump_cfg_fmtint(oPermitLocalCommand, o->permit_local_command); + dump_cfg_fmtint(oProtocol, o->protocol); + dump_cfg_fmtint(oProxyUseFdpass, o->proxy_use_fdpass); + dump_cfg_fmtint(oPubkeyAuthentication, o->pubkey_authentication); + dump_cfg_fmtint(oRequestTTY, o->request_tty); + dump_cfg_fmtint(oRhostsRSAAuthentication, o->rhosts_rsa_authentication); + dump_cfg_fmtint(oRSAAuthentication, o->rsa_authentication); + dump_cfg_fmtint(oStreamLocalBindUnlink, o->fwd_opts.streamlocal_bind_unlink); + dump_cfg_fmtint(oStrictHostKeyChecking, o->strict_host_key_checking); + dump_cfg_fmtint(oTCPKeepAlive, o->tcp_keep_alive); + dump_cfg_fmtint(oTunnel, o->tun_open); + dump_cfg_fmtint(oUsePrivilegedPort, o->use_privileged_port); + dump_cfg_fmtint(oVerifyHostKeyDNS, o->verify_host_key_dns); + dump_cfg_fmtint(oVisualHostKey, o->visual_host_key); + dump_cfg_fmtint(oUpdateHostkeys, o->update_hostkeys); + + /* Integer options */ + dump_cfg_int(oCanonicalizeMaxDots, o->canonicalize_max_dots); + dump_cfg_int(oCompressionLevel, o->compression_level); + dump_cfg_int(oConnectionAttempts, o->connection_attempts); + dump_cfg_int(oForwardX11Timeout, o->forward_x11_timeout); + dump_cfg_int(oNumberOfPasswordPrompts, o->number_of_password_prompts); + dump_cfg_int(oServerAliveCountMax, o->server_alive_count_max); + dump_cfg_int(oServerAliveInterval, o->server_alive_interval); + + /* String options */ + dump_cfg_string(oBindAddress, o->bind_address); + dump_cfg_string(oCiphers, o->ciphers ? o->ciphers : KEX_CLIENT_ENCRYPT); + dump_cfg_string(oControlPath, o->control_path); + dump_cfg_string(oHostKeyAlgorithms, o->hostkeyalgorithms ? o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG); + dump_cfg_string(oHostKeyAlias, o->host_key_alias); + dump_cfg_string(oHostbasedKeyTypes, o->hostbased_key_types); + dump_cfg_string(oKbdInteractiveDevices, o->kbd_interactive_devices); + dump_cfg_string(oKexAlgorithms, o->kex_algorithms ? o->kex_algorithms : KEX_CLIENT_KEX); + dump_cfg_string(oLocalCommand, o->local_command); + dump_cfg_string(oLogLevel, log_level_name(o->log_level)); + dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC); + dump_cfg_string(oPKCS11Provider, o->pkcs11_provider); + dump_cfg_string(oPreferredAuthentications, o->preferred_authentications); + dump_cfg_string(oProxyCommand, o->proxy_command); + dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys); + dump_cfg_string(oXAuthLocation, o->xauth_location); + + /* Forwards */ + dump_cfg_forwards(oDynamicForward, o->num_local_forwards, o->local_forwards); + dump_cfg_forwards(oLocalForward, o->num_local_forwards, o->local_forwards); + dump_cfg_forwards(oRemoteForward, o->num_remote_forwards, o->remote_forwards); + + /* String array options */ + dump_cfg_strarray(oIdentityFile, o->num_identity_files, o->identity_files); + dump_cfg_strarray_oneline(oCanonicalDomains, o->num_canonical_domains, o->canonical_domains); + dump_cfg_strarray_oneline(oGlobalKnownHostsFile, o->num_system_hostfiles, o->system_hostfiles); + dump_cfg_strarray_oneline(oUserKnownHostsFile, o->num_user_hostfiles, o->user_hostfiles); + dump_cfg_strarray(oSendEnv, o->num_send_env, o->send_env); + + /* Special cases */ + + /* oConnectTimeout */ + if (o->connection_timeout == -1) + printf("connecttimeout none\n"); + else + dump_cfg_int(oConnectTimeout, o->connection_timeout); + + /* oTunnelDevice */ + printf("tunneldevice"); + if (o->tun_local == SSH_TUNID_ANY) + printf(" any"); + else + printf(" %d", o->tun_local); + if (o->tun_remote == SSH_TUNID_ANY) + printf(":any"); + else + printf(":%d", o->tun_remote); + printf("\n"); + + /* oCanonicalizePermittedCNAMEs */ + if ( o->num_permitted_cnames > 0) { + printf("canonicalizePermittedcnames"); + for (i = 0; i < o->num_permitted_cnames; i++) { + printf(" %s:%s", o->permitted_cnames[i].source_list, + o->permitted_cnames[i].target_list); + } + printf("\n"); + } + + /* oCipher */ + if (o->cipher != SSH_CIPHER_NOT_SET) + printf("Cipher %s\n", cipher_name(o->cipher)); + + /* oControlPersist */ + if (o->control_persist == 0 || o->control_persist_timeout == 0) + dump_cfg_fmtint(oControlPersist, o->control_persist); + else + dump_cfg_int(oControlPersist, o->control_persist_timeout); + + /* oEscapeChar */ + if (o->escape_char == SSH_ESCAPECHAR_NONE) + printf("escapechar none\n"); + else { + vis(vbuf, o->escape_char, VIS_WHITE, 0); + printf("escapechar %s\n", vbuf); + } + + /* oIPQoS */ + printf("ipqos %s ", iptos2str(o->ip_qos_interactive)); + printf("%s\n", iptos2str(o->ip_qos_bulk)); + + /* oRekeyLimit */ + printf("rekeylimit %lld %d\n", + (long long)o->rekey_limit, o->rekey_interval); + + /* oStreamLocalBindMask */ + printf("streamlocalbindmask 0%o\n", + o->fwd_opts.streamlocal_bind_mask); +} diff --git a/readconf.h b/readconf.h index 25e3b8c..9946168 100644 --- a/readconf.h +++ b/readconf.h @@ -1,4 +1,4 @@ -/* $OpenBSD: readconf.h,v 1.90 2011/05/24 07:15:47 djm Exp $ */ +/* $OpenBSD: readconf.h,v 1.110 2015/07/10 06:21:53 markus Exp $ */ /* * Author: Tatu Ylonen @@ -16,19 +16,20 @@ #ifndef READCONF_H #define READCONF_H -/* Data structure for representing a forwarding request. */ - -typedef struct { - char *listen_host; /* Host (address) to listen on. */ - int listen_port; /* Port to forward. */ - char *connect_host; /* Host to connect. */ - int connect_port; /* Port to connect on connect_host. */ - int allocated_port; /* Dynamically allocated listen port */ -} Forward; +#ifdef WIN32_FIXME +#include "misc.h" +#endif /* Data structure for representing option data. */ #define MAX_SEND_ENV 256 -#define SSH_MAX_HOSTS_FILES 256 +#define SSH_MAX_HOSTS_FILES 32 +#define MAX_CANON_DOMAINS 32 +#define PATH_MAX_SUN (sizeof((struct sockaddr_un *)0)->sun_path) + +struct allowed_cname { + char *source_list; + char *target_list; +}; typedef struct { int forward_agent; /* Forward authentication agent. */ @@ -37,7 +38,7 @@ typedef struct { int forward_x11_trusted; /* Trust Forward X11 display. */ int exit_on_forward_failure; /* Exit if bind(2) fails for -L/-R */ char *xauth_location; /* Location for xauth program */ - int gateway_ports; /* Allow remote connects to forwarded ports. */ + struct ForwardOptions fwd_opts; /* forwarding options */ int use_privileged_port; /* Don't use privileged port if false. */ int rhosts_rsa_authentication; /* Try rhosts with RSA * authentication. */ @@ -52,7 +53,6 @@ typedef struct { * authentication. */ int kbd_interactive_authentication; /* Try keyboard-interactive auth. */ char *kbd_interactive_devices; /* Keyboard-interactive auth devices. */ - int zero_knowledge_password_authentication; /* Try jpake */ int batch_mode; /* Batch mode: do not ask for passwords. */ int check_host_ip; /* Also keep track of keys for IP address */ int strict_host_key_checking; /* Strict host key checking. */ @@ -95,19 +95,21 @@ typedef struct { int num_identity_files; /* Number of files for RSA/DSA identities. */ char *identity_files[SSH_MAX_IDENTITY_FILES]; - Key *identity_keys[SSH_MAX_IDENTITY_FILES]; + int identity_file_userprovided[SSH_MAX_IDENTITY_FILES]; + struct sshkey *identity_keys[SSH_MAX_IDENTITY_FILES]; /* Local TCP/IP forward requests. */ int num_local_forwards; - Forward *local_forwards; + struct Forward *local_forwards; /* Remote TCP/IP forward requests. */ int num_remote_forwards; - Forward *remote_forwards; + struct Forward *remote_forwards; int clear_forwardings; int enable_ssh_keysign; int64_t rekey_limit; + int rekey_interval; int no_host_authentication_for_localhost; int identities_only; int server_alive_interval; @@ -135,14 +137,38 @@ typedef struct { int request_tty; - #ifdef WIN32_FIXME + int proxy_use_fdpass; + + int num_canonical_domains; + char *canonical_domains[MAX_CANON_DOMAINS]; + int canonicalize_hostname; + int canonicalize_max_dots; + int canonicalize_fallback_local; + int num_permitted_cnames; + struct allowed_cname permitted_cnames[MAX_CANON_DOMAINS]; + + char *revoked_host_keys; + + int fingerprint_hash; + + int update_hostkeys; /* one of SSH_UPDATE_HOSTKEYS_* */ + + char *hostbased_key_types; + char *pubkey_key_types; + + char *ignored_unknown; /* Pattern list of unknown tokens to ignore */ +#ifdef WIN32_FIXME HANDLE passInputHandle_; HANDLE passOutputHandle_; - #endif +#endif } Options; +#define SSH_CANONICALISE_NO 0 +#define SSH_CANONICALISE_YES 1 +#define SSH_CANONICALISE_ALWAYS 2 + #define SSHCTL_MASTER_NO 0 #define SSHCTL_MASTER_YES 1 #define SSHCTL_MASTER_AUTO 2 @@ -154,15 +180,28 @@ typedef struct { #define REQUEST_TTY_YES 2 #define REQUEST_TTY_FORCE 3 +#define SSHCONF_CHECKPERM 1 /* check permissions on config file */ +#define SSHCONF_USERCONF 2 /* user provided config file not system */ +#define SSHCONF_POSTCANON 4 /* After hostname canonicalisation */ + +#define SSH_UPDATE_HOSTKEYS_NO 0 +#define SSH_UPDATE_HOSTKEYS_YES 1 +#define SSH_UPDATE_HOSTKEYS_ASK 2 + void initialize_options(Options *); void fill_default_options(Options *); -int read_config_file(const char *, const char *, Options *, int); -int parse_forward(Forward *, const char *, int, int); +void fill_default_options_for_canonicalization(Options *); +int process_config_line(Options *, struct passwd *, const char *, + const char *, char *, const char *, int, int *, int); +int read_config_file(const char *, struct passwd *, const char *, + const char *, Options *, int); +int parse_forward(struct Forward *, const char *, int, int); +int default_ssh_port(void); +int option_clear_or_none(const char *); +void dump_client_config(Options *o, const char *host); -int -process_config_line(Options *, const char *, char *, const char *, int, int *); - -void add_local_forward(Options *, const Forward *); -void add_remote_forward(Options *, const Forward *); +void add_local_forward(Options *, const struct Forward *); +void add_remote_forward(Options *, const struct Forward *); +void add_identity_file(Options *, const char *, const char *, int); #endif /* READCONF_H */ diff --git a/readpass.c b/readpass.c index b3b8cfd..d06f2e1 100644 --- a/readpass.c +++ b/readpass.c @@ -1,4 +1,4 @@ -/* $OpenBSD: readpass.c,v 1.48 2010/12/15 00:49:27 djm Exp $ */ +/* $OpenBSD: readpass.c,v 1.50 2014/02/02 03:44:31 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * @@ -57,7 +57,6 @@ #endif - static char * ssh_askpass(char *askpass, const char *msg) { @@ -66,7 +65,6 @@ ssh_askpass(char *askpass, const char *msg) /* * Original openssh code. */ - pid_t pid, ret; size_t len; char *pass; @@ -116,13 +114,13 @@ ssh_askpass(char *askpass, const char *msg) break; signal(SIGCHLD, osigchld); if (ret == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) { - memset(buf, 0, sizeof(buf)); + explicit_bzero(buf, sizeof(buf)); return NULL; } buf[strcspn(buf, "\r\n")] = '\0'; pass = xstrdup(buf); - memset(buf, 0, sizeof(buf)); + explicit_bzero(buf, sizeof(buf)); return pass; #else @@ -246,6 +244,7 @@ ssh_askpass(char *askpass, const char *msg) char * read_passphrase(const char *prompt, int flags) { + #ifndef WIN32_FIXME /* @@ -296,8 +295,9 @@ read_passphrase(const char *prompt, int flags) } ret = xstrdup(buf); - memset(buf, 'x', sizeof buf); + explicit_bzero(buf, sizeof(buf)); return ret; + /* * Win32 code. @@ -468,7 +468,7 @@ ask_permission(const char *fmt, ...) if (*p == '\0' || *p == '\n' || strcasecmp(p, "yes") == 0) allowed = 1; - xfree(p); + free(p); } return (allowed); diff --git a/rijndael.c b/rijndael.c index 7432ea2..40ab7b1 100644 --- a/rijndael.c +++ b/rijndael.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rijndael.c,v 1.16 2004/06/23 00:39:38 mouring Exp $ */ +/* $OpenBSD: rijndael.c,v 1.20 2015/03/16 11:09:52 djm Exp $ */ /** * rijndael-alg-fst.c @@ -25,6 +25,7 @@ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ + #include "includes.h" #include @@ -32,20 +33,19 @@ #include "rijndael.h" -#define FULL_UNROLL +#undef FULL_UNROLL /* Te0[x] = S [x].[02, 01, 01, 03]; Te1[x] = S [x].[03, 02, 01, 01]; Te2[x] = S [x].[01, 03, 02, 01]; Te3[x] = S [x].[01, 01, 03, 02]; -Te4[x] = S [x].[01, 01, 01, 01]; Td0[x] = Si[x].[0e, 09, 0d, 0b]; Td1[x] = Si[x].[0b, 0e, 09, 0d]; Td2[x] = Si[x].[0d, 0b, 0e, 09]; Td3[x] = Si[x].[09, 0d, 0b, 0e]; -Td4[x] = Si[x].[01, 01, 01, 01]; +Td4[x] = Si[x].[01]; */ static const u32 Te0[256] = { @@ -247,7 +247,6 @@ static const u32 Te2[256] = { 0xb0cb7bb0U, 0x54fca854U, 0xbbd66dbbU, 0x163a2c16U, }; static const u32 Te3[256] = { - 0x6363a5c6U, 0x7c7c84f8U, 0x777799eeU, 0x7b7b8df6U, 0xf2f20dffU, 0x6b6bbdd6U, 0x6f6fb1deU, 0xc5c55491U, 0x30305060U, 0x01010302U, 0x6767a9ceU, 0x2b2b7d56U, @@ -313,72 +312,7 @@ static const u32 Te3[256] = { 0x4141c382U, 0x9999b029U, 0x2d2d775aU, 0x0f0f111eU, 0xb0b0cb7bU, 0x5454fca8U, 0xbbbbd66dU, 0x16163a2cU, }; -static const u32 Te4[256] = { - 0x63636363U, 0x7c7c7c7cU, 0x77777777U, 0x7b7b7b7bU, - 0xf2f2f2f2U, 0x6b6b6b6bU, 0x6f6f6f6fU, 0xc5c5c5c5U, - 0x30303030U, 0x01010101U, 0x67676767U, 0x2b2b2b2bU, - 0xfefefefeU, 0xd7d7d7d7U, 0xababababU, 0x76767676U, - 0xcacacacaU, 0x82828282U, 0xc9c9c9c9U, 0x7d7d7d7dU, - 0xfafafafaU, 0x59595959U, 0x47474747U, 0xf0f0f0f0U, - 0xadadadadU, 0xd4d4d4d4U, 0xa2a2a2a2U, 0xafafafafU, - 0x9c9c9c9cU, 0xa4a4a4a4U, 0x72727272U, 0xc0c0c0c0U, - 0xb7b7b7b7U, 0xfdfdfdfdU, 0x93939393U, 0x26262626U, - 0x36363636U, 0x3f3f3f3fU, 0xf7f7f7f7U, 0xccccccccU, - 0x34343434U, 0xa5a5a5a5U, 0xe5e5e5e5U, 0xf1f1f1f1U, - 0x71717171U, 0xd8d8d8d8U, 0x31313131U, 0x15151515U, - 0x04040404U, 0xc7c7c7c7U, 0x23232323U, 0xc3c3c3c3U, - 0x18181818U, 0x96969696U, 0x05050505U, 0x9a9a9a9aU, - 0x07070707U, 0x12121212U, 0x80808080U, 0xe2e2e2e2U, - 0xebebebebU, 0x27272727U, 0xb2b2b2b2U, 0x75757575U, - 0x09090909U, 0x83838383U, 0x2c2c2c2cU, 0x1a1a1a1aU, - 0x1b1b1b1bU, 0x6e6e6e6eU, 0x5a5a5a5aU, 0xa0a0a0a0U, - 0x52525252U, 0x3b3b3b3bU, 0xd6d6d6d6U, 0xb3b3b3b3U, - 0x29292929U, 0xe3e3e3e3U, 0x2f2f2f2fU, 0x84848484U, - 0x53535353U, 0xd1d1d1d1U, 0x00000000U, 0xededededU, - 0x20202020U, 0xfcfcfcfcU, 0xb1b1b1b1U, 0x5b5b5b5bU, - 0x6a6a6a6aU, 0xcbcbcbcbU, 0xbebebebeU, 0x39393939U, - 0x4a4a4a4aU, 0x4c4c4c4cU, 0x58585858U, 0xcfcfcfcfU, - 0xd0d0d0d0U, 0xefefefefU, 0xaaaaaaaaU, 0xfbfbfbfbU, - 0x43434343U, 0x4d4d4d4dU, 0x33333333U, 0x85858585U, - 0x45454545U, 0xf9f9f9f9U, 0x02020202U, 0x7f7f7f7fU, - 0x50505050U, 0x3c3c3c3cU, 0x9f9f9f9fU, 0xa8a8a8a8U, - 0x51515151U, 0xa3a3a3a3U, 0x40404040U, 0x8f8f8f8fU, - 0x92929292U, 0x9d9d9d9dU, 0x38383838U, 0xf5f5f5f5U, - 0xbcbcbcbcU, 0xb6b6b6b6U, 0xdadadadaU, 0x21212121U, - 0x10101010U, 0xffffffffU, 0xf3f3f3f3U, 0xd2d2d2d2U, - 0xcdcdcdcdU, 0x0c0c0c0cU, 0x13131313U, 0xececececU, - 0x5f5f5f5fU, 0x97979797U, 0x44444444U, 0x17171717U, - 0xc4c4c4c4U, 0xa7a7a7a7U, 0x7e7e7e7eU, 0x3d3d3d3dU, - 0x64646464U, 0x5d5d5d5dU, 0x19191919U, 0x73737373U, - 0x60606060U, 0x81818181U, 0x4f4f4f4fU, 0xdcdcdcdcU, - 0x22222222U, 0x2a2a2a2aU, 0x90909090U, 0x88888888U, - 0x46464646U, 0xeeeeeeeeU, 0xb8b8b8b8U, 0x14141414U, - 0xdedededeU, 0x5e5e5e5eU, 0x0b0b0b0bU, 0xdbdbdbdbU, - 0xe0e0e0e0U, 0x32323232U, 0x3a3a3a3aU, 0x0a0a0a0aU, - 0x49494949U, 0x06060606U, 0x24242424U, 0x5c5c5c5cU, - 0xc2c2c2c2U, 0xd3d3d3d3U, 0xacacacacU, 0x62626262U, - 0x91919191U, 0x95959595U, 0xe4e4e4e4U, 0x79797979U, - 0xe7e7e7e7U, 0xc8c8c8c8U, 0x37373737U, 0x6d6d6d6dU, - 0x8d8d8d8dU, 0xd5d5d5d5U, 0x4e4e4e4eU, 0xa9a9a9a9U, - 0x6c6c6c6cU, 0x56565656U, 0xf4f4f4f4U, 0xeaeaeaeaU, - 0x65656565U, 0x7a7a7a7aU, 0xaeaeaeaeU, 0x08080808U, - 0xbabababaU, 0x78787878U, 0x25252525U, 0x2e2e2e2eU, - 0x1c1c1c1cU, 0xa6a6a6a6U, 0xb4b4b4b4U, 0xc6c6c6c6U, - 0xe8e8e8e8U, 0xddddddddU, 0x74747474U, 0x1f1f1f1fU, - 0x4b4b4b4bU, 0xbdbdbdbdU, 0x8b8b8b8bU, 0x8a8a8a8aU, - 0x70707070U, 0x3e3e3e3eU, 0xb5b5b5b5U, 0x66666666U, - 0x48484848U, 0x03030303U, 0xf6f6f6f6U, 0x0e0e0e0eU, - 0x61616161U, 0x35353535U, 0x57575757U, 0xb9b9b9b9U, - 0x86868686U, 0xc1c1c1c1U, 0x1d1d1d1dU, 0x9e9e9e9eU, - 0xe1e1e1e1U, 0xf8f8f8f8U, 0x98989898U, 0x11111111U, - 0x69696969U, 0xd9d9d9d9U, 0x8e8e8e8eU, 0x94949494U, - 0x9b9b9b9bU, 0x1e1e1e1eU, 0x87878787U, 0xe9e9e9e9U, - 0xcecececeU, 0x55555555U, 0x28282828U, 0xdfdfdfdfU, - 0x8c8c8c8cU, 0xa1a1a1a1U, 0x89898989U, 0x0d0d0d0dU, - 0xbfbfbfbfU, 0xe6e6e6e6U, 0x42424242U, 0x68686868U, - 0x41414141U, 0x99999999U, 0x2d2d2d2dU, 0x0f0f0f0fU, - 0xb0b0b0b0U, 0x54545454U, 0xbbbbbbbbU, 0x16161616U, -}; +#if 0 static const u32 Td0[256] = { 0x51f4a750U, 0x7e416553U, 0x1a17a4c3U, 0x3a275e96U, 0x3bab6bcbU, 0x1f9d45f1U, 0xacfa58abU, 0x4be30393U, @@ -532,7 +466,6 @@ static const u32 Td2[256] = { 0xf4cd65daU, 0xbed50605U, 0x621fd134U, 0xfe8ac4a6U, 0x539d342eU, 0x55a0a2f3U, 0xe132058aU, 0xeb75a4f6U, 0xec390b83U, 0xefaa4060U, 0x9f065e71U, 0x1051bd6eU, - 0x8af93e21U, 0x063d96ddU, 0x05aedd3eU, 0xbd464de6U, 0x8db59154U, 0x5d0571c4U, 0xd46f0406U, 0x15ff6050U, 0xfb241998U, 0xe997d6bdU, 0x43cc8940U, 0x9e7767d9U, @@ -644,72 +577,41 @@ static const u32 Td3[256] = { 0xa8017139U, 0x0cb3de08U, 0xb4e49cd8U, 0x56c19064U, 0xcb84617bU, 0x32b670d5U, 0x6c5c7448U, 0xb85742d0U, }; -static const u32 Td4[256] = { - 0x52525252U, 0x09090909U, 0x6a6a6a6aU, 0xd5d5d5d5U, - 0x30303030U, 0x36363636U, 0xa5a5a5a5U, 0x38383838U, - 0xbfbfbfbfU, 0x40404040U, 0xa3a3a3a3U, 0x9e9e9e9eU, - 0x81818181U, 0xf3f3f3f3U, 0xd7d7d7d7U, 0xfbfbfbfbU, - 0x7c7c7c7cU, 0xe3e3e3e3U, 0x39393939U, 0x82828282U, - 0x9b9b9b9bU, 0x2f2f2f2fU, 0xffffffffU, 0x87878787U, - 0x34343434U, 0x8e8e8e8eU, 0x43434343U, 0x44444444U, - 0xc4c4c4c4U, 0xdedededeU, 0xe9e9e9e9U, 0xcbcbcbcbU, - 0x54545454U, 0x7b7b7b7bU, 0x94949494U, 0x32323232U, - 0xa6a6a6a6U, 0xc2c2c2c2U, 0x23232323U, 0x3d3d3d3dU, - 0xeeeeeeeeU, 0x4c4c4c4cU, 0x95959595U, 0x0b0b0b0bU, - 0x42424242U, 0xfafafafaU, 0xc3c3c3c3U, 0x4e4e4e4eU, - 0x08080808U, 0x2e2e2e2eU, 0xa1a1a1a1U, 0x66666666U, - 0x28282828U, 0xd9d9d9d9U, 0x24242424U, 0xb2b2b2b2U, - 0x76767676U, 0x5b5b5b5bU, 0xa2a2a2a2U, 0x49494949U, - 0x6d6d6d6dU, 0x8b8b8b8bU, 0xd1d1d1d1U, 0x25252525U, - 0x72727272U, 0xf8f8f8f8U, 0xf6f6f6f6U, 0x64646464U, - 0x86868686U, 0x68686868U, 0x98989898U, 0x16161616U, - 0xd4d4d4d4U, 0xa4a4a4a4U, 0x5c5c5c5cU, 0xccccccccU, - 0x5d5d5d5dU, 0x65656565U, 0xb6b6b6b6U, 0x92929292U, - 0x6c6c6c6cU, 0x70707070U, 0x48484848U, 0x50505050U, - 0xfdfdfdfdU, 0xededededU, 0xb9b9b9b9U, 0xdadadadaU, - 0x5e5e5e5eU, 0x15151515U, 0x46464646U, 0x57575757U, - 0xa7a7a7a7U, 0x8d8d8d8dU, 0x9d9d9d9dU, 0x84848484U, - 0x90909090U, 0xd8d8d8d8U, 0xababababU, 0x00000000U, - 0x8c8c8c8cU, 0xbcbcbcbcU, 0xd3d3d3d3U, 0x0a0a0a0aU, - 0xf7f7f7f7U, 0xe4e4e4e4U, 0x58585858U, 0x05050505U, - 0xb8b8b8b8U, 0xb3b3b3b3U, 0x45454545U, 0x06060606U, - 0xd0d0d0d0U, 0x2c2c2c2cU, 0x1e1e1e1eU, 0x8f8f8f8fU, - 0xcacacacaU, 0x3f3f3f3fU, 0x0f0f0f0fU, 0x02020202U, - 0xc1c1c1c1U, 0xafafafafU, 0xbdbdbdbdU, 0x03030303U, - 0x01010101U, 0x13131313U, 0x8a8a8a8aU, 0x6b6b6b6bU, - 0x3a3a3a3aU, 0x91919191U, 0x11111111U, 0x41414141U, - 0x4f4f4f4fU, 0x67676767U, 0xdcdcdcdcU, 0xeaeaeaeaU, - 0x97979797U, 0xf2f2f2f2U, 0xcfcfcfcfU, 0xcecececeU, - 0xf0f0f0f0U, 0xb4b4b4b4U, 0xe6e6e6e6U, 0x73737373U, - 0x96969696U, 0xacacacacU, 0x74747474U, 0x22222222U, - 0xe7e7e7e7U, 0xadadadadU, 0x35353535U, 0x85858585U, - 0xe2e2e2e2U, 0xf9f9f9f9U, 0x37373737U, 0xe8e8e8e8U, - 0x1c1c1c1cU, 0x75757575U, 0xdfdfdfdfU, 0x6e6e6e6eU, - 0x47474747U, 0xf1f1f1f1U, 0x1a1a1a1aU, 0x71717171U, - 0x1d1d1d1dU, 0x29292929U, 0xc5c5c5c5U, 0x89898989U, - 0x6f6f6f6fU, 0xb7b7b7b7U, 0x62626262U, 0x0e0e0e0eU, - 0xaaaaaaaaU, 0x18181818U, 0xbebebebeU, 0x1b1b1b1bU, - 0xfcfcfcfcU, 0x56565656U, 0x3e3e3e3eU, 0x4b4b4b4bU, - 0xc6c6c6c6U, 0xd2d2d2d2U, 0x79797979U, 0x20202020U, - 0x9a9a9a9aU, 0xdbdbdbdbU, 0xc0c0c0c0U, 0xfefefefeU, - 0x78787878U, 0xcdcdcdcdU, 0x5a5a5a5aU, 0xf4f4f4f4U, - 0x1f1f1f1fU, 0xddddddddU, 0xa8a8a8a8U, 0x33333333U, - 0x88888888U, 0x07070707U, 0xc7c7c7c7U, 0x31313131U, - 0xb1b1b1b1U, 0x12121212U, 0x10101010U, 0x59595959U, - 0x27272727U, 0x80808080U, 0xececececU, 0x5f5f5f5fU, - 0x60606060U, 0x51515151U, 0x7f7f7f7fU, 0xa9a9a9a9U, - 0x19191919U, 0xb5b5b5b5U, 0x4a4a4a4aU, 0x0d0d0d0dU, - 0x2d2d2d2dU, 0xe5e5e5e5U, 0x7a7a7a7aU, 0x9f9f9f9fU, - 0x93939393U, 0xc9c9c9c9U, 0x9c9c9c9cU, 0xefefefefU, - 0xa0a0a0a0U, 0xe0e0e0e0U, 0x3b3b3b3bU, 0x4d4d4d4dU, - 0xaeaeaeaeU, 0x2a2a2a2aU, 0xf5f5f5f5U, 0xb0b0b0b0U, - 0xc8c8c8c8U, 0xebebebebU, 0xbbbbbbbbU, 0x3c3c3c3cU, - 0x83838383U, 0x53535353U, 0x99999999U, 0x61616161U, - 0x17171717U, 0x2b2b2b2bU, 0x04040404U, 0x7e7e7e7eU, - 0xbabababaU, 0x77777777U, 0xd6d6d6d6U, 0x26262626U, - 0xe1e1e1e1U, 0x69696969U, 0x14141414U, 0x63636363U, - 0x55555555U, 0x21212121U, 0x0c0c0c0cU, 0x7d7d7d7dU, +static const u8 Td4[256] = { + 0x52U, 0x09U, 0x6aU, 0xd5U, 0x30U, 0x36U, 0xa5U, 0x38U, + 0xbfU, 0x40U, 0xa3U, 0x9eU, 0x81U, 0xf3U, 0xd7U, 0xfbU, + 0x7cU, 0xe3U, 0x39U, 0x82U, 0x9bU, 0x2fU, 0xffU, 0x87U, + 0x34U, 0x8eU, 0x43U, 0x44U, 0xc4U, 0xdeU, 0xe9U, 0xcbU, + 0x54U, 0x7bU, 0x94U, 0x32U, 0xa6U, 0xc2U, 0x23U, 0x3dU, + 0xeeU, 0x4cU, 0x95U, 0x0bU, 0x42U, 0xfaU, 0xc3U, 0x4eU, + 0x08U, 0x2eU, 0xa1U, 0x66U, 0x28U, 0xd9U, 0x24U, 0xb2U, + 0x76U, 0x5bU, 0xa2U, 0x49U, 0x6dU, 0x8bU, 0xd1U, 0x25U, + 0x72U, 0xf8U, 0xf6U, 0x64U, 0x86U, 0x68U, 0x98U, 0x16U, + 0xd4U, 0xa4U, 0x5cU, 0xccU, 0x5dU, 0x65U, 0xb6U, 0x92U, + 0x6cU, 0x70U, 0x48U, 0x50U, 0xfdU, 0xedU, 0xb9U, 0xdaU, + 0x5eU, 0x15U, 0x46U, 0x57U, 0xa7U, 0x8dU, 0x9dU, 0x84U, + 0x90U, 0xd8U, 0xabU, 0x00U, 0x8cU, 0xbcU, 0xd3U, 0x0aU, + 0xf7U, 0xe4U, 0x58U, 0x05U, 0xb8U, 0xb3U, 0x45U, 0x06U, + 0xd0U, 0x2cU, 0x1eU, 0x8fU, 0xcaU, 0x3fU, 0x0fU, 0x02U, + 0xc1U, 0xafU, 0xbdU, 0x03U, 0x01U, 0x13U, 0x8aU, 0x6bU, + 0x3aU, 0x91U, 0x11U, 0x41U, 0x4fU, 0x67U, 0xdcU, 0xeaU, + 0x97U, 0xf2U, 0xcfU, 0xceU, 0xf0U, 0xb4U, 0xe6U, 0x73U, + 0x96U, 0xacU, 0x74U, 0x22U, 0xe7U, 0xadU, 0x35U, 0x85U, + 0xe2U, 0xf9U, 0x37U, 0xe8U, 0x1cU, 0x75U, 0xdfU, 0x6eU, + 0x47U, 0xf1U, 0x1aU, 0x71U, 0x1dU, 0x29U, 0xc5U, 0x89U, + 0x6fU, 0xb7U, 0x62U, 0x0eU, 0xaaU, 0x18U, 0xbeU, 0x1bU, + 0xfcU, 0x56U, 0x3eU, 0x4bU, 0xc6U, 0xd2U, 0x79U, 0x20U, + 0x9aU, 0xdbU, 0xc0U, 0xfeU, 0x78U, 0xcdU, 0x5aU, 0xf4U, + 0x1fU, 0xddU, 0xa8U, 0x33U, 0x88U, 0x07U, 0xc7U, 0x31U, + 0xb1U, 0x12U, 0x10U, 0x59U, 0x27U, 0x80U, 0xecU, 0x5fU, + 0x60U, 0x51U, 0x7fU, 0xa9U, 0x19U, 0xb5U, 0x4aU, 0x0dU, + 0x2dU, 0xe5U, 0x7aU, 0x9fU, 0x93U, 0xc9U, 0x9cU, 0xefU, + 0xa0U, 0xe0U, 0x3bU, 0x4dU, 0xaeU, 0x2aU, 0xf5U, 0xb0U, + 0xc8U, 0xebU, 0xbbU, 0x3cU, 0x83U, 0x53U, 0x99U, 0x61U, + 0x17U, 0x2bU, 0x04U, 0x7eU, 0xbaU, 0x77U, 0xd6U, 0x26U, + 0xe1U, 0x69U, 0x14U, 0x63U, 0x55U, 0x21U, 0x0cU, 0x7dU, }; +#endif static const u32 rcon[] = { 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000, @@ -724,8 +626,10 @@ static const u32 rcon[] = { * * @return the number of rounds for the given cipher key size. */ -static int rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits) { - int i = 0; +int +rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits) +{ + int i = 0; u32 temp; rk[0] = GETU32(cipherKey ); @@ -736,10 +640,10 @@ static int rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int for (;;) { temp = rk[3]; rk[4] = rk[0] ^ - (Te4[(temp >> 16) & 0xff] & 0xff000000) ^ - (Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^ - (Te4[(temp ) & 0xff] & 0x0000ff00) ^ - (Te4[(temp >> 24) ] & 0x000000ff) ^ + (Te2[(temp >> 16) & 0xff] & 0xff000000) ^ + (Te3[(temp >> 8) & 0xff] & 0x00ff0000) ^ + (Te0[(temp ) & 0xff] & 0x0000ff00) ^ + (Te1[(temp >> 24) ] & 0x000000ff) ^ rcon[i]; rk[5] = rk[1] ^ rk[4]; rk[6] = rk[2] ^ rk[5]; @@ -756,10 +660,10 @@ static int rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int for (;;) { temp = rk[ 5]; rk[ 6] = rk[ 0] ^ - (Te4[(temp >> 16) & 0xff] & 0xff000000) ^ - (Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^ - (Te4[(temp ) & 0xff] & 0x0000ff00) ^ - (Te4[(temp >> 24) ] & 0x000000ff) ^ + (Te2[(temp >> 16) & 0xff] & 0xff000000) ^ + (Te3[(temp >> 8) & 0xff] & 0x00ff0000) ^ + (Te0[(temp ) & 0xff] & 0x0000ff00) ^ + (Te1[(temp >> 24) ] & 0x000000ff) ^ rcon[i]; rk[ 7] = rk[ 1] ^ rk[ 6]; rk[ 8] = rk[ 2] ^ rk[ 7]; @@ -778,49 +682,47 @@ static int rijndaelKeySetupEnc(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int for (;;) { temp = rk[ 7]; rk[ 8] = rk[ 0] ^ - (Te4[(temp >> 16) & 0xff] & 0xff000000) ^ - (Te4[(temp >> 8) & 0xff] & 0x00ff0000) ^ - (Te4[(temp ) & 0xff] & 0x0000ff00) ^ - (Te4[(temp >> 24) ] & 0x000000ff) ^ + (Te2[(temp >> 16) & 0xff] & 0xff000000) ^ + (Te3[(temp >> 8) & 0xff] & 0x00ff0000) ^ + (Te0[(temp ) & 0xff] & 0x0000ff00) ^ + (Te1[(temp >> 24) ] & 0x000000ff) ^ rcon[i]; rk[ 9] = rk[ 1] ^ rk[ 8]; rk[10] = rk[ 2] ^ rk[ 9]; rk[11] = rk[ 3] ^ rk[10]; - if (++i == 7) { - return 14; - } + if (++i == 7) { + return 14; + } temp = rk[11]; rk[12] = rk[ 4] ^ - (Te4[(temp >> 24) ] & 0xff000000) ^ - (Te4[(temp >> 16) & 0xff] & 0x00ff0000) ^ - (Te4[(temp >> 8) & 0xff] & 0x0000ff00) ^ - (Te4[(temp ) & 0xff] & 0x000000ff); + (Te2[(temp >> 24) ] & 0xff000000) ^ + (Te3[(temp >> 16) & 0xff] & 0x00ff0000) ^ + (Te0[(temp >> 8) & 0xff] & 0x0000ff00) ^ + (Te1[(temp ) & 0xff] & 0x000000ff); rk[13] = rk[ 5] ^ rk[12]; rk[14] = rk[ 6] ^ rk[13]; - rk[15] = rk[ 7] ^ rk[14]; + rk[15] = rk[ 7] ^ rk[14]; rk += 8; } } return 0; } +#if 0 /** * Expand the cipher key into the decryption key schedule. * * @return the number of rounds for the given cipher key size. */ -static int -rijndaelKeySetupDec(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits, - int have_encrypt) { +int +rijndaelKeySetupDec(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits) +{ int Nr, i, j; u32 temp; - if (have_encrypt) { - Nr = have_encrypt; - } else { - /* expand the cipher key: */ - Nr = rijndaelKeySetupEnc(rk, cipherKey, keyBits); - } + /* expand the cipher key: */ + Nr = rijndaelKeySetupEnc(rk, cipherKey, keyBits); + /* invert the order of the round keys: */ for (i = 0, j = 4*Nr; i < j; i += 4, j -= 4) { temp = rk[i ]; rk[i ] = rk[j ]; rk[j ] = temp; @@ -832,30 +734,34 @@ rijndaelKeySetupDec(u32 rk[/*4*(Nr + 1)*/], const u8 cipherKey[], int keyBits, for (i = 1; i < Nr; i++) { rk += 4; rk[0] = - Td0[Te4[(rk[0] >> 24) ] & 0xff] ^ - Td1[Te4[(rk[0] >> 16) & 0xff] & 0xff] ^ - Td2[Te4[(rk[0] >> 8) & 0xff] & 0xff] ^ - Td3[Te4[(rk[0] ) & 0xff] & 0xff]; + Td0[Te1[(rk[0] >> 24) ] & 0xff] ^ + Td1[Te1[(rk[0] >> 16) & 0xff] & 0xff] ^ + Td2[Te1[(rk[0] >> 8) & 0xff] & 0xff] ^ + Td3[Te1[(rk[0] ) & 0xff] & 0xff]; rk[1] = - Td0[Te4[(rk[1] >> 24) ] & 0xff] ^ - Td1[Te4[(rk[1] >> 16) & 0xff] & 0xff] ^ - Td2[Te4[(rk[1] >> 8) & 0xff] & 0xff] ^ - Td3[Te4[(rk[1] ) & 0xff] & 0xff]; + Td0[Te1[(rk[1] >> 24) ] & 0xff] ^ + Td1[Te1[(rk[1] >> 16) & 0xff] & 0xff] ^ + Td2[Te1[(rk[1] >> 8) & 0xff] & 0xff] ^ + Td3[Te1[(rk[1] ) & 0xff] & 0xff]; rk[2] = - Td0[Te4[(rk[2] >> 24) ] & 0xff] ^ - Td1[Te4[(rk[2] >> 16) & 0xff] & 0xff] ^ - Td2[Te4[(rk[2] >> 8) & 0xff] & 0xff] ^ - Td3[Te4[(rk[2] ) & 0xff] & 0xff]; + Td0[Te1[(rk[2] >> 24) ] & 0xff] ^ + Td1[Te1[(rk[2] >> 16) & 0xff] & 0xff] ^ + Td2[Te1[(rk[2] >> 8) & 0xff] & 0xff] ^ + Td3[Te1[(rk[2] ) & 0xff] & 0xff]; rk[3] = - Td0[Te4[(rk[3] >> 24) ] & 0xff] ^ - Td1[Te4[(rk[3] >> 16) & 0xff] & 0xff] ^ - Td2[Te4[(rk[3] >> 8) & 0xff] & 0xff] ^ - Td3[Te4[(rk[3] ) & 0xff] & 0xff]; + Td0[Te1[(rk[3] >> 24) ] & 0xff] ^ + Td1[Te1[(rk[3] >> 16) & 0xff] & 0xff] ^ + Td2[Te1[(rk[3] >> 8) & 0xff] & 0xff] ^ + Td3[Te1[(rk[3] ) & 0xff] & 0xff]; } return Nr; } +#endif -static void rijndaelEncrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 pt[16], u8 ct[16]) { +void +rijndaelEncrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 pt[16], + u8 ct[16]) +{ u32 s0, s1, s2, s3, t0, t1, t2, t3; #ifndef FULL_UNROLL int r; @@ -871,50 +777,50 @@ static void rijndaelEncrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 pt[16 s3 = GETU32(pt + 12) ^ rk[3]; #ifdef FULL_UNROLL /* round 1: */ - t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[ 4]; - t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[ 5]; - t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[ 6]; - t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[ 7]; - /* round 2: */ - s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[ 8]; - s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[ 9]; - s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[10]; - s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[11]; + t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[ 4]; + t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[ 5]; + t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[ 6]; + t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[ 7]; + /* round 2: */ + s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[ 8]; + s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[ 9]; + s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[10]; + s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[11]; /* round 3: */ - t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[12]; - t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[13]; - t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[14]; - t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[15]; - /* round 4: */ - s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[16]; - s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[17]; - s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[18]; - s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[19]; + t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[12]; + t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[13]; + t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[14]; + t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[15]; + /* round 4: */ + s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[16]; + s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[17]; + s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[18]; + s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[19]; /* round 5: */ - t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[20]; - t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[21]; - t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[22]; - t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[23]; - /* round 6: */ - s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[24]; - s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[25]; - s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[26]; - s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[27]; + t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[20]; + t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[21]; + t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[22]; + t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[23]; + /* round 6: */ + s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[24]; + s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[25]; + s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[26]; + s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[27]; /* round 7: */ - t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[28]; - t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[29]; - t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[30]; - t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[31]; - /* round 8: */ - s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[32]; - s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[33]; - s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[34]; - s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[35]; + t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[28]; + t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[29]; + t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[30]; + t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[31]; + /* round 8: */ + s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[32]; + s1 = Te0[t1 >> 24] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[t0 & 0xff] ^ rk[33]; + s2 = Te0[t2 >> 24] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[t1 & 0xff] ^ rk[34]; + s3 = Te0[t3 >> 24] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[t2 & 0xff] ^ rk[35]; /* round 9: */ - t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[36]; - t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[37]; - t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[38]; - t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[39]; + t0 = Te0[s0 >> 24] ^ Te1[(s1 >> 16) & 0xff] ^ Te2[(s2 >> 8) & 0xff] ^ Te3[s3 & 0xff] ^ rk[36]; + t1 = Te0[s1 >> 24] ^ Te1[(s2 >> 16) & 0xff] ^ Te2[(s3 >> 8) & 0xff] ^ Te3[s0 & 0xff] ^ rk[37]; + t2 = Te0[s2 >> 24] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[s1 & 0xff] ^ rk[38]; + t3 = Te0[s3 >> 24] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[s2 & 0xff] ^ rk[39]; if (Nr > 10) { /* round 10: */ s0 = Te0[t0 >> 24] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[t3 & 0xff] ^ rk[40]; @@ -1007,36 +913,40 @@ static void rijndaelEncrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 pt[16 * map cipher state to byte array block: */ s0 = - (Te4[(t0 >> 24) ] & 0xff000000) ^ - (Te4[(t1 >> 16) & 0xff] & 0x00ff0000) ^ - (Te4[(t2 >> 8) & 0xff] & 0x0000ff00) ^ - (Te4[(t3 ) & 0xff] & 0x000000ff) ^ + (Te2[(t0 >> 24) ] & 0xff000000) ^ + (Te3[(t1 >> 16) & 0xff] & 0x00ff0000) ^ + (Te0[(t2 >> 8) & 0xff] & 0x0000ff00) ^ + (Te1[(t3 ) & 0xff] & 0x000000ff) ^ rk[0]; PUTU32(ct , s0); s1 = - (Te4[(t1 >> 24) ] & 0xff000000) ^ - (Te4[(t2 >> 16) & 0xff] & 0x00ff0000) ^ - (Te4[(t3 >> 8) & 0xff] & 0x0000ff00) ^ - (Te4[(t0 ) & 0xff] & 0x000000ff) ^ + (Te2[(t1 >> 24) ] & 0xff000000) ^ + (Te3[(t2 >> 16) & 0xff] & 0x00ff0000) ^ + (Te0[(t3 >> 8) & 0xff] & 0x0000ff00) ^ + (Te1[(t0 ) & 0xff] & 0x000000ff) ^ rk[1]; PUTU32(ct + 4, s1); s2 = - (Te4[(t2 >> 24) ] & 0xff000000) ^ - (Te4[(t3 >> 16) & 0xff] & 0x00ff0000) ^ - (Te4[(t0 >> 8) & 0xff] & 0x0000ff00) ^ - (Te4[(t1 ) & 0xff] & 0x000000ff) ^ + (Te2[(t2 >> 24) ] & 0xff000000) ^ + (Te3[(t3 >> 16) & 0xff] & 0x00ff0000) ^ + (Te0[(t0 >> 8) & 0xff] & 0x0000ff00) ^ + (Te1[(t1 ) & 0xff] & 0x000000ff) ^ rk[2]; PUTU32(ct + 8, s2); s3 = - (Te4[(t3 >> 24) ] & 0xff000000) ^ - (Te4[(t0 >> 16) & 0xff] & 0x00ff0000) ^ - (Te4[(t1 >> 8) & 0xff] & 0x0000ff00) ^ - (Te4[(t2 ) & 0xff] & 0x000000ff) ^ + (Te2[(t3 >> 24) ] & 0xff000000) ^ + (Te3[(t0 >> 16) & 0xff] & 0x00ff0000) ^ + (Te0[(t1 >> 8) & 0xff] & 0x0000ff00) ^ + (Te1[(t2 ) & 0xff] & 0x000000ff) ^ rk[3]; PUTU32(ct + 12, s3); } -static void rijndaelDecrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 ct[16], u8 pt[16]) { +#if 0 +static void +rijndaelDecrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 ct[16], + u8 pt[16]) +{ u32 s0, s1, s2, s3, t0, t1, t2, t3; #ifndef FULL_UNROLL int r; @@ -1187,58 +1097,33 @@ static void rijndaelDecrypt(const u32 rk[/*4*(Nr + 1)*/], int Nr, const u8 ct[16 * apply last round and * map cipher state to byte array block: */ - s0 = - (Td4[(t0 >> 24) ] & 0xff000000) ^ - (Td4[(t3 >> 16) & 0xff] & 0x00ff0000) ^ - (Td4[(t2 >> 8) & 0xff] & 0x0000ff00) ^ - (Td4[(t1 ) & 0xff] & 0x000000ff) ^ - rk[0]; + s0 = + (Td4[(t0 >> 24) ] << 24) ^ + (Td4[(t3 >> 16) & 0xff] << 16) ^ + (Td4[(t2 >> 8) & 0xff] << 8) ^ + (Td4[(t1 ) & 0xff]) ^ + rk[0]; PUTU32(pt , s0); - s1 = - (Td4[(t1 >> 24) ] & 0xff000000) ^ - (Td4[(t0 >> 16) & 0xff] & 0x00ff0000) ^ - (Td4[(t3 >> 8) & 0xff] & 0x0000ff00) ^ - (Td4[(t2 ) & 0xff] & 0x000000ff) ^ - rk[1]; + s1 = + (Td4[(t1 >> 24) ] << 24) ^ + (Td4[(t0 >> 16) & 0xff] << 16) ^ + (Td4[(t3 >> 8) & 0xff] << 8) ^ + (Td4[(t2 ) & 0xff]) ^ + rk[1]; PUTU32(pt + 4, s1); - s2 = - (Td4[(t2 >> 24) ] & 0xff000000) ^ - (Td4[(t1 >> 16) & 0xff] & 0x00ff0000) ^ - (Td4[(t0 >> 8) & 0xff] & 0x0000ff00) ^ - (Td4[(t3 ) & 0xff] & 0x000000ff) ^ - rk[2]; + s2 = + (Td4[(t2 >> 24) ] << 24) ^ + (Td4[(t1 >> 16) & 0xff] << 16) ^ + (Td4[(t0 >> 8) & 0xff] << 8) ^ + (Td4[(t3 ) & 0xff]) ^ + rk[2]; PUTU32(pt + 8, s2); - s3 = - (Td4[(t3 >> 24) ] & 0xff000000) ^ - (Td4[(t2 >> 16) & 0xff] & 0x00ff0000) ^ - (Td4[(t1 >> 8) & 0xff] & 0x0000ff00) ^ - (Td4[(t0 ) & 0xff] & 0x000000ff) ^ - rk[3]; + s3 = + (Td4[(t3 >> 24) ] << 24) ^ + (Td4[(t2 >> 16) & 0xff] << 16) ^ + (Td4[(t1 >> 8) & 0xff] << 8) ^ + (Td4[(t0 ) & 0xff]) ^ + rk[3]; PUTU32(pt + 12, s3); } - -void -rijndael_set_key(rijndael_ctx *ctx, u_char *key, int bits, int do_encrypt) -{ - ctx->Nr = rijndaelKeySetupEnc(ctx->ek, key, bits); - if (do_encrypt) { - ctx->decrypt = 0; - memset(ctx->dk, 0, sizeof(ctx->dk)); - } else { - ctx->decrypt = 1; - memcpy(ctx->dk, ctx->ek, sizeof(ctx->dk)); - rijndaelKeySetupDec(ctx->dk, key, bits, ctx->Nr); - } -} - -void -rijndael_decrypt(rijndael_ctx *ctx, u_char *src, u_char *dst) -{ - rijndaelDecrypt(ctx->dk, ctx->Nr, src, dst); -} - -void -rijndael_encrypt(rijndael_ctx *ctx, u_char *src, u_char *dst) -{ - rijndaelEncrypt(ctx->ek, ctx->Nr, src, dst); -} +#endif diff --git a/rijndael.h b/rijndael.h index c614bb1..53e74e0 100644 --- a/rijndael.h +++ b/rijndael.h @@ -1,4 +1,4 @@ -/* $OpenBSD: rijndael.h,v 1.12 2001/12/19 07:18:56 deraadt Exp $ */ +/* $OpenBSD: rijndael.h,v 1.14 2014/04/29 15:42:07 markus Exp $ */ /** * rijndael-alg-fst.h @@ -25,27 +25,32 @@ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef __RIJNDAEL_H -#define __RIJNDAEL_H +#ifndef _PRIVATE_RIJNDAEL_H +#define _PRIVATE_RIJNDAEL_H -#define MAXKC (256/32) -#define MAXKB (256/8) -#define MAXNR 14 +#define AES_MAXKEYBITS (256) +#define AES_MAXKEYBYTES (AES_MAXKEYBITS/8) +/* for 256-bit keys, fewer for less */ +#define AES_MAXROUNDS 14 typedef unsigned char u8; typedef unsigned short u16; typedef unsigned int u32; +int rijndaelKeySetupEnc(unsigned int [], const unsigned char [], int); +void rijndaelEncrypt(const unsigned int [], int, const unsigned char [], + unsigned char []); + /* The structure for key information */ typedef struct { int decrypt; - int Nr; /* key-length-dependent number of rounds */ - u32 ek[4*(MAXNR + 1)]; /* encrypt key schedule */ - u32 dk[4*(MAXNR + 1)]; /* decrypt key schedule */ + int Nr; /* key-length-dependent number of rounds */ + u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */ + u32 dk[4*(AES_MAXROUNDS + 1)]; /* decrypt key schedule */ } rijndael_ctx; void rijndael_set_key(rijndael_ctx *, u_char *, int, int); void rijndael_decrypt(rijndael_ctx *, u_char *, u_char *); void rijndael_encrypt(rijndael_ctx *, u_char *, u_char *); -#endif /* __RIJNDAEL_H */ +#endif /* _PRIVATE_RIJNDAEL_H */ diff --git a/roaming.h b/roaming.h index 6bb94cc..da069f8 100644 --- a/roaming.h +++ b/roaming.h @@ -1,4 +1,4 @@ -/* $OpenBSD: roaming.h,v 1.5 2009/10/24 11:11:58 andreas Exp $ */ +/* $OpenBSD: roaming.h,v 1.6 2011/12/07 05:44:38 djm Exp $ */ /* * Copyright (c) 2004-2009 AppGate Network Security AB * @@ -18,8 +18,9 @@ #ifndef ROAMING_H #define ROAMING_H -#define DEFAULT_ROAMBUF 65536 -#define ROAMING_REQUEST "roaming@appgate.com" +#define DEFAULT_ROAMBUF 65536 +#define MAX_ROAMBUF (2*1024*1024) /* XXX arbitrary */ +#define ROAMING_REQUEST "roaming@appgate.com" extern int roaming_enabled; extern int resume_in_progress; diff --git a/roaming_client.c b/roaming_client.c index 1808491..e6b75e1 100644 --- a/roaming_client.c +++ b/roaming_client.c @@ -1,4 +1,4 @@ -/* $OpenBSD: roaming_client.c,v 1.3 2010/01/18 01:50:27 dtucker Exp $ */ +/* $OpenBSD: roaming_client.c,v 1.9 2015/01/27 12:54:06 okan Exp $ */ /* * Copyright (c) 2004-2009 AppGate Network Security AB * @@ -21,16 +21,10 @@ #include #include -#ifdef HAVE_INTTYPES_H -#include -#endif #include #include #include -#include -#include - #include "xmalloc.h" #include "buffer.h" #include "channels.h" @@ -48,6 +42,7 @@ #include "roaming.h" #include "ssh2.h" #include "sshconnect.h" +#include "digest.h" /* import */ extern Options options; @@ -72,7 +67,7 @@ roaming_reply(int type, u_int32_t seq, void *ctxt) cookie = packet_get_int64(); key1 = oldkey1 = packet_get_int64(); key2 = oldkey2 = packet_get_int64(); - set_out_buffer_size(packet_get_int() + get_snd_buf_size()); + set_out_buffer_size(packet_get_int() + get_snd_buf_size()); roaming_enabled = 1; } @@ -90,10 +85,8 @@ request_roaming(void) static void roaming_auth_required(void) { - u_char digest[SHA_DIGEST_LENGTH]; - EVP_MD_CTX md; + u_char digest[SSH_DIGEST_MAX_LENGTH]; Buffer b; - const EVP_MD *evp_md = EVP_sha1(); u_int64_t chall, oldchall; chall = packet_get_int64(); @@ -107,14 +100,13 @@ roaming_auth_required(void) buffer_init(&b); buffer_put_int64(&b, cookie); buffer_put_int64(&b, chall); - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestFinal(&md, digest, NULL); + if (ssh_digest_buffer(SSH_DIGEST_SHA1, &b, digest, sizeof(digest)) != 0) + fatal("%s: ssh_digest_buffer failed", __func__); buffer_free(&b); packet_start(SSH2_MSG_KEX_ROAMING_AUTH); packet_put_int64(key1 ^ get_recv_bytes()); - packet_put_raw(digest, sizeof(digest)); + packet_put_raw(digest, ssh_digest_bytes(SSH_DIGEST_SHA1)); packet_send(); oldkey1 = key1; @@ -187,10 +179,10 @@ roaming_resume(void) debug("server doesn't allow resume"); goto fail; } - xfree(str); + free(str); for (i = 1; i < PROPOSAL_MAX; i++) { /* kex algorithm taken care of so start with i=1 and not 0 */ - xfree(packet_get_string(&len)); + free(packet_get_string(&len)); } i = packet_get_char(); /* first_kex_packet_follows */ if (i && (c = strchr(kexlist, ','))) @@ -226,8 +218,7 @@ roaming_resume(void) return 0; fail: - if (kexlist) - xfree(kexlist); + free(kexlist); if (packet_get_connection_in() == packet_get_connection_out()) close(packet_get_connection_in()); else { @@ -262,10 +253,10 @@ wait_for_roaming_reconnect(void) if (c != '\n' && c != '\r') continue; - if (ssh_connect(host, &hostaddr, options.port, + if (ssh_connect(host, NULL, &hostaddr, options.port, options.address_family, 1, &timeout_ms, - options.tcp_keep_alive, options.use_privileged_port, - options.proxy_command) == 0 && roaming_resume() == 0) { + options.tcp_keep_alive, options.use_privileged_port) == 0 && + roaming_resume() == 0) { packet_restore_state(); reenter_guard = 0; fprintf(stderr, "[connection resumed]\n"); diff --git a/roaming_common.c b/roaming_common.c index e1ffe97..bdb26a5 100644 --- a/roaming_common.c +++ b/roaming_common.c @@ -1,4 +1,4 @@ -/* $OpenBSD: roaming_common.c,v 1.8 2010/01/12 00:59:29 djm Exp $ */ +/* $OpenBSD: roaming_common.c,v 1.13 2015/01/27 12:54:06 okan Exp $ */ /* * Copyright (c) 2004-2009 AppGate Network Security AB * @@ -31,9 +31,6 @@ #include #include -#ifdef HAVE_INTTYPES_H -#include -#endif #include #include #include @@ -45,6 +42,7 @@ #include "cipher.h" #include "buffer.h" #include "roaming.h" +#include "digest.h" #ifdef WIN32_FIXME @@ -65,7 +63,7 @@ int roaming_enabled = 0; int resume_in_progress = 0; int -get_snd_buf_size() +get_snd_buf_size(void) { int fd = packet_get_connection_out(); int optval; @@ -77,7 +75,7 @@ get_snd_buf_size() } int -get_recv_buf_size() +get_recv_buf_size(void) { int fd = packet_get_connection_in(); int optval; @@ -91,6 +89,8 @@ get_recv_buf_size() void set_out_buffer_size(size_t size) { + if (size == 0 || size > MAX_ROAMBUF) + fatal("%s: bad buffer size %lu", __func__, (u_long)size); /* * The buffer size can only be set once and the buffer will live * as long as the session lives. @@ -239,9 +239,7 @@ resend_bytes(int fd, u_int64_t *offset) void calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge) { - const EVP_MD *md = EVP_sha1(); - EVP_MD_CTX ctx; - char hash[EVP_MAX_MD_SIZE]; + u_char hash[SSH_DIGEST_MAX_LENGTH]; Buffer b; buffer_init(&b); @@ -249,12 +247,11 @@ calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge) buffer_put_int64(&b, cookie); buffer_put_int64(&b, challenge); - EVP_DigestInit(&ctx, md); - EVP_DigestUpdate(&ctx, buffer_ptr(&b), buffer_len(&b)); - EVP_DigestFinal(&ctx, hash, NULL); + if (ssh_digest_buffer(SSH_DIGEST_SHA1, &b, hash, sizeof(hash)) != 0) + fatal("%s: digest_buffer failed", __func__); buffer_clear(&b); - buffer_append(&b, hash, EVP_MD_size(md)); + buffer_append(&b, hash, ssh_digest_bytes(SSH_DIGEST_SHA1)); *key = buffer_get_int64(&b); buffer_free(&b); } diff --git a/roaming_dummy.c b/roaming_dummy.c index 45c4008..837de69 100644 --- a/roaming_dummy.c +++ b/roaming_dummy.c @@ -1,4 +1,4 @@ -/* $OpenBSD: roaming_dummy.c,v 1.3 2009/06/21 09:04:03 dtucker Exp $ */ +/* $OpenBSD: roaming_dummy.c,v 1.4 2015/01/19 19:52:16 markus Exp $ */ /* * Copyright (c) 2004-2009 AppGate Network Security AB * @@ -35,6 +35,17 @@ get_recv_bytes(void) return 0; } +u_int64_t +get_sent_bytes(void) +{ + return 0; +} + +void +roam_set_bytes(u_int64_t sent, u_int64_t recvd) +{ +} + ssize_t roaming_write(int fd, const void *buf, size_t count, int *cont) { diff --git a/rsa.c b/rsa.c index bec1d19..5ecacef 100644 --- a/rsa.c +++ b/rsa.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rsa.c,v 1.29 2006/11/06 21:25:28 markus Exp $ */ +/* $OpenBSD: rsa.c,v 1.32 2014/06/24 01:13:21 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -67,85 +67,122 @@ #include #include -#include "xmalloc.h" #include "rsa.h" #include "log.h" +#include "ssherr.h" -void +int rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key) { - u_char *inbuf, *outbuf; - int len, ilen, olen; + u_char *inbuf = NULL, *outbuf = NULL; + int len, ilen, olen, r = SSH_ERR_INTERNAL_ERROR; if (BN_num_bits(key->e) < 2 || !BN_is_odd(key->e)) - fatal("rsa_public_encrypt() exponent too small or not odd"); + return SSH_ERR_INVALID_ARGUMENT; olen = BN_num_bytes(key->n); - outbuf = xmalloc(olen); + if ((outbuf = malloc(olen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } ilen = BN_num_bytes(in); - inbuf = xmalloc(ilen); + if ((inbuf = malloc(ilen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } BN_bn2bin(in, inbuf); if ((len = RSA_public_encrypt(ilen, inbuf, outbuf, key, - RSA_PKCS1_PADDING)) <= 0) - fatal("rsa_public_encrypt() failed"); + RSA_PKCS1_PADDING)) <= 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } - if (BN_bin2bn(outbuf, len, out) == NULL) - fatal("rsa_public_encrypt: BN_bin2bn failed"); + if (BN_bin2bn(outbuf, len, out) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + r = 0; - memset(outbuf, 0, olen); - memset(inbuf, 0, ilen); - xfree(outbuf); - xfree(inbuf); + out: + if (outbuf != NULL) { + explicit_bzero(outbuf, olen); + free(outbuf); + } + if (inbuf != NULL) { + explicit_bzero(inbuf, ilen); + free(inbuf); + } + return r; } int rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key) { - u_char *inbuf, *outbuf; - int len, ilen, olen; + u_char *inbuf = NULL, *outbuf = NULL; + int len, ilen, olen, r = SSH_ERR_INTERNAL_ERROR; olen = BN_num_bytes(key->n); - outbuf = xmalloc(olen); + if ((outbuf = malloc(olen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } ilen = BN_num_bytes(in); - inbuf = xmalloc(ilen); + if ((inbuf = malloc(ilen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } BN_bn2bin(in, inbuf); if ((len = RSA_private_decrypt(ilen, inbuf, outbuf, key, RSA_PKCS1_PADDING)) <= 0) { - error("rsa_private_decrypt() failed"); - } else { - if (BN_bin2bn(outbuf, len, out) == NULL) - fatal("rsa_private_decrypt: BN_bin2bn failed"); + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } else if (BN_bin2bn(outbuf, len, out) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; } - memset(outbuf, 0, olen); - memset(inbuf, 0, ilen); - xfree(outbuf); - xfree(inbuf); - return len; + r = 0; + out: + if (outbuf != NULL) { + explicit_bzero(outbuf, olen); + free(outbuf); + } + if (inbuf != NULL) { + explicit_bzero(inbuf, ilen); + free(inbuf); + } + return r; } /* calculate p-1 and q-1 */ -void +int rsa_generate_additional_parameters(RSA *rsa) { - BIGNUM *aux; - BN_CTX *ctx; + BIGNUM *aux = NULL; + BN_CTX *ctx = NULL; + int r; - if ((aux = BN_new()) == NULL) - fatal("rsa_generate_additional_parameters: BN_new failed"); if ((ctx = BN_CTX_new()) == NULL) - fatal("rsa_generate_additional_parameters: BN_CTX_new failed"); + return SSH_ERR_ALLOC_FAIL; + if ((aux = BN_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } if ((BN_sub(aux, rsa->q, BN_value_one()) == 0) || (BN_mod(rsa->dmq1, rsa->d, aux, ctx) == 0) || (BN_sub(aux, rsa->p, BN_value_one()) == 0) || - (BN_mod(rsa->dmp1, rsa->d, aux, ctx) == 0)) - fatal("rsa_generate_additional_parameters: BN_sub/mod failed"); - + (BN_mod(rsa->dmp1, rsa->d, aux, ctx) == 0)) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + r = 0; + out: BN_clear_free(aux); BN_CTX_free(ctx); + return r; } diff --git a/rsa.h b/rsa.h index b841ea4..c476707 100644 --- a/rsa.h +++ b/rsa.h @@ -1,4 +1,4 @@ -/* $OpenBSD: rsa.h,v 1.16 2006/03/25 22:22:43 djm Exp $ */ +/* $OpenBSD: rsa.h,v 1.17 2014/06/24 01:13:21 djm Exp $ */ /* * Author: Tatu Ylonen @@ -19,8 +19,8 @@ #include #include -void rsa_public_encrypt(BIGNUM *, BIGNUM *, RSA *); +int rsa_public_encrypt(BIGNUM *, BIGNUM *, RSA *); int rsa_private_decrypt(BIGNUM *, BIGNUM *, RSA *); -void rsa_generate_additional_parameters(RSA *); +int rsa_generate_additional_parameters(RSA *); #endif /* RSA_H */ diff --git a/runconfigure b/runconfigure new file mode 100644 index 0000000..8387298 --- /dev/null +++ b/runconfigure @@ -0,0 +1 @@ +./configure --build=i686-pc-mingw32 --host=i686-pc-mingw32 --with-ssl-dir=../openssl-1.0.2d --with-zlib=../zlib-1.2.8 --with-kerberos5 \ No newline at end of file diff --git a/sandbox-capsicum.c b/sandbox-capsicum.c new file mode 100644 index 0000000..655f0d2 --- /dev/null +++ b/sandbox-capsicum.c @@ -0,0 +1,122 @@ +/* + * Copyright (c) 2011 Dag-Erling Smorgrav + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#ifdef SANDBOX_CAPSICUM + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "log.h" +#include "monitor.h" +#include "ssh-sandbox.h" +#include "xmalloc.h" + +/* + * Capsicum sandbox that sets zero nfiles, nprocs and filesize rlimits, + * limits rights on stdout, stdin, stderr, monitor and switches to + * capability mode. + */ + +struct ssh_sandbox { + struct monitor *monitor; + pid_t child_pid; +}; + +struct ssh_sandbox * +ssh_sandbox_init(struct monitor *monitor) +{ + struct ssh_sandbox *box; + + /* + * Strictly, we don't need to maintain any state here but we need + * to return non-NULL to satisfy the API. + */ + debug3("%s: preparing capsicum sandbox", __func__); + box = xcalloc(1, sizeof(*box)); + box->monitor = monitor; + box->child_pid = 0; + + return box; +} + +void +ssh_sandbox_child(struct ssh_sandbox *box) +{ + struct rlimit rl_zero; + cap_rights_t rights; + + rl_zero.rlim_cur = rl_zero.rlim_max = 0; + + if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", + __func__, strerror(errno)); +#ifndef SANDBOX_SKIP_RLIMIT_NOFILE + if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", + __func__, strerror(errno)); +#endif + if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", + __func__, strerror(errno)); + + cap_rights_init(&rights); + + if (cap_rights_limit(STDIN_FILENO, &rights) < 0 && errno != ENOSYS) + fatal("can't limit stdin: %m"); + if (cap_rights_limit(STDOUT_FILENO, &rights) < 0 && errno != ENOSYS) + fatal("can't limit stdout: %m"); + if (cap_rights_limit(STDERR_FILENO, &rights) < 0 && errno != ENOSYS) + fatal("can't limit stderr: %m"); + + cap_rights_init(&rights, CAP_READ, CAP_WRITE); + if (cap_rights_limit(box->monitor->m_recvfd, &rights) < 0 && + errno != ENOSYS) + fatal("%s: failed to limit the network socket", __func__); + cap_rights_init(&rights, CAP_WRITE); + if (cap_rights_limit(box->monitor->m_log_sendfd, &rights) < 0 && + errno != ENOSYS) + fatal("%s: failed to limit the logging socket", __func__); + if (cap_enter() < 0 && errno != ENOSYS) + fatal("%s: failed to enter capability mode", __func__); + +} + +void +ssh_sandbox_parent_finish(struct ssh_sandbox *box) +{ + free(box); + debug3("%s: finished", __func__); +} + +void +ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) +{ + box->child_pid = child_pid; +} + +#endif /* SANDBOX_CAPSICUM */ diff --git a/sandbox-darwin.c b/sandbox-darwin.c index 69901ef..35f0c4d 100644 --- a/sandbox-darwin.c +++ b/sandbox-darwin.c @@ -40,7 +40,7 @@ struct ssh_sandbox { }; struct ssh_sandbox * -ssh_sandbox_init(void) +ssh_sandbox_init(struct monitor *monitor) { struct ssh_sandbox *box; diff --git a/sandbox-null.c b/sandbox-null.c index 29fa966..d4cb918 100644 --- a/sandbox-null.c +++ b/sandbox-null.c @@ -39,7 +39,7 @@ struct ssh_sandbox { }; struct ssh_sandbox * -ssh_sandbox_init(void) +ssh_sandbox_init(struct monitor *monitor) { struct ssh_sandbox *box; diff --git a/sandbox-rlimit.c b/sandbox-rlimit.c index 761e928..bba8077 100644 --- a/sandbox-rlimit.c +++ b/sandbox-rlimit.c @@ -42,7 +42,7 @@ struct ssh_sandbox { }; struct ssh_sandbox * -ssh_sandbox_init(void) +ssh_sandbox_init(struct monitor *monitor) { struct ssh_sandbox *box; @@ -64,12 +64,16 @@ ssh_sandbox_child(struct ssh_sandbox *box) rl_zero.rlim_cur = rl_zero.rlim_max = 0; +#ifndef SANDBOX_SKIP_RLIMIT_FSIZE if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", __func__, strerror(errno)); +#endif +#ifndef SANDBOX_SKIP_RLIMIT_NOFILE if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", __func__, strerror(errno)); +#endif #ifdef HAVE_RLIMIT_NPROC if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", diff --git a/sandbox-seccomp-filter.c b/sandbox-seccomp-filter.c new file mode 100644 index 0000000..2462bcc --- /dev/null +++ b/sandbox-seccomp-filter.c @@ -0,0 +1,318 @@ +/* + * Copyright (c) 2012 Will Drewry + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * Uncomment the SANDBOX_SECCOMP_FILTER_DEBUG macro below to help diagnose + * filter breakage during development. *Do not* use this in production, + * as it relies on making library calls that are unsafe in signal context. + * + * Instead, live systems the auditctl(8) may be used to monitor failures. + * E.g. + * auditctl -a task,always -F uid= + */ +/* #define SANDBOX_SECCOMP_FILTER_DEBUG 1 */ + +/* XXX it should be possible to do logging via the log socket safely */ + +#ifdef SANDBOX_SECCOMP_FILTER_DEBUG +/* Use the kernel headers in case of an older toolchain. */ +# include +# define __have_siginfo_t 1 +# define __have_sigval_t 1 +# define __have_sigevent_t 1 +#endif /* SANDBOX_SECCOMP_FILTER_DEBUG */ + +#include "includes.h" + +#ifdef SANDBOX_SECCOMP_FILTER + +#include +#include +#include + +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include /* for offsetof */ +#include +#include +#include +#include + +#include "log.h" +#include "ssh-sandbox.h" +#include "xmalloc.h" + +/* Linux seccomp_filter sandbox */ +#define SECCOMP_FILTER_FAIL SECCOMP_RET_KILL + +/* Use a signal handler to emit violations when debugging */ +#ifdef SANDBOX_SECCOMP_FILTER_DEBUG +# undef SECCOMP_FILTER_FAIL +# define SECCOMP_FILTER_FAIL SECCOMP_RET_TRAP +#endif /* SANDBOX_SECCOMP_FILTER_DEBUG */ + +/* Simple helpers to avoid manual errors (but larger BPF programs). */ +#define SC_DENY(_nr, _errno) \ + BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 1), \ + BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ERRNO|(_errno)) +#define SC_ALLOW(_nr) \ + BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 1), \ + BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW) +#define SC_ALLOW_ARG(_nr, _arg_nr, _arg_val) \ + BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 4), \ + /* load first syscall argument */ \ + BPF_STMT(BPF_LD+BPF_W+BPF_ABS, \ + offsetof(struct seccomp_data, args[(_arg_nr)])), \ + BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, (_arg_val), 0, 1), \ + BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW), \ + /* reload syscall number; all rules expect it in accumulator */ \ + BPF_STMT(BPF_LD+BPF_W+BPF_ABS, \ + offsetof(struct seccomp_data, nr)) + +/* Syscall filtering set for preauth. */ +static const struct sock_filter preauth_insns[] = { + /* Ensure the syscall arch convention is as expected. */ + BPF_STMT(BPF_LD+BPF_W+BPF_ABS, + offsetof(struct seccomp_data, arch)), + BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, SECCOMP_AUDIT_ARCH, 1, 0), + BPF_STMT(BPF_RET+BPF_K, SECCOMP_FILTER_FAIL), + /* Load the syscall number for checking. */ + BPF_STMT(BPF_LD+BPF_W+BPF_ABS, + offsetof(struct seccomp_data, nr)), + + /* Syscalls to non-fatally deny */ +#ifdef __NR_fstat + SC_DENY(fstat, EACCES), +#endif +#ifdef __NR_fstat64 + SC_DENY(fstat64, EACCES), +#endif +#ifdef __NR_open + SC_DENY(open, EACCES), +#endif +#ifdef __NR_openat + SC_DENY(openat, EACCES), +#endif +#ifdef __NR_newfstatat + SC_DENY(newfstatat, EACCES), +#endif +#ifdef __NR_stat + SC_DENY(stat, EACCES), +#endif +#ifdef __NR_stat64 + SC_DENY(stat64, EACCES), +#endif + + /* Syscalls to permit */ +#ifdef __NR_brk + SC_ALLOW(brk), +#endif +#ifdef __NR_clock_gettime + SC_ALLOW(clock_gettime), +#endif +#ifdef __NR_close + SC_ALLOW(close), +#endif +#ifdef __NR_exit + SC_ALLOW(exit), +#endif +#ifdef __NR_exit_group + SC_ALLOW(exit_group), +#endif +#ifdef __NR_getpgid + SC_ALLOW(getpgid), +#endif +#ifdef __NR_getpid + SC_ALLOW(getpid), +#endif +#ifdef __NR_gettimeofday + SC_ALLOW(gettimeofday), +#endif +#ifdef __NR_madvise + SC_ALLOW(madvise), +#endif +#ifdef __NR_mmap + SC_ALLOW(mmap), +#endif +#ifdef __NR_mmap2 + SC_ALLOW(mmap2), +#endif +#ifdef __NR_mremap + SC_ALLOW(mremap), +#endif +#ifdef __NR_munmap + SC_ALLOW(munmap), +#endif +#ifdef __NR__newselect + SC_ALLOW(_newselect), +#endif +#ifdef __NR_poll + SC_ALLOW(poll), +#endif +#ifdef __NR_pselect6 + SC_ALLOW(pselect6), +#endif +#ifdef __NR_read + SC_ALLOW(read), +#endif +#ifdef __NR_rt_sigprocmask + SC_ALLOW(rt_sigprocmask), +#endif +#ifdef __NR_select + SC_ALLOW(select), +#endif +#ifdef __NR_shutdown + SC_ALLOW(shutdown), +#endif +#ifdef __NR_sigprocmask + SC_ALLOW(sigprocmask), +#endif +#ifdef __NR_time + SC_ALLOW(time), +#endif +#ifdef __NR_write + SC_ALLOW(write), +#endif +#ifdef __NR_socketcall + SC_ALLOW_ARG(socketcall, 0, SYS_SHUTDOWN), +#endif + + /* Default deny */ + BPF_STMT(BPF_RET+BPF_K, SECCOMP_FILTER_FAIL), +}; + +static const struct sock_fprog preauth_program = { + .len = (unsigned short)(sizeof(preauth_insns)/sizeof(preauth_insns[0])), + .filter = (struct sock_filter *)preauth_insns, +}; + +struct ssh_sandbox { + pid_t child_pid; +}; + +struct ssh_sandbox * +ssh_sandbox_init(struct monitor *monitor) +{ + struct ssh_sandbox *box; + + /* + * Strictly, we don't need to maintain any state here but we need + * to return non-NULL to satisfy the API. + */ + debug3("%s: preparing seccomp filter sandbox", __func__); + box = xcalloc(1, sizeof(*box)); + box->child_pid = 0; + + return box; +} + +#ifdef SANDBOX_SECCOMP_FILTER_DEBUG +extern struct monitor *pmonitor; +void mm_log_handler(LogLevel level, const char *msg, void *ctx); + +static void +ssh_sandbox_violation(int signum, siginfo_t *info, void *void_context) +{ + char msg[256]; + + snprintf(msg, sizeof(msg), + "%s: unexpected system call (arch:0x%x,syscall:%d @ %p)", + __func__, info->si_arch, info->si_syscall, info->si_call_addr); + mm_log_handler(SYSLOG_LEVEL_FATAL, msg, pmonitor); + _exit(1); +} + +static void +ssh_sandbox_child_debugging(void) +{ + struct sigaction act; + sigset_t mask; + + debug3("%s: installing SIGSYS handler", __func__); + memset(&act, 0, sizeof(act)); + sigemptyset(&mask); + sigaddset(&mask, SIGSYS); + + act.sa_sigaction = &ssh_sandbox_violation; + act.sa_flags = SA_SIGINFO; + if (sigaction(SIGSYS, &act, NULL) == -1) + fatal("%s: sigaction(SIGSYS): %s", __func__, strerror(errno)); + if (sigprocmask(SIG_UNBLOCK, &mask, NULL) == -1) + fatal("%s: sigprocmask(SIGSYS): %s", + __func__, strerror(errno)); +} +#endif /* SANDBOX_SECCOMP_FILTER_DEBUG */ + +void +ssh_sandbox_child(struct ssh_sandbox *box) +{ + struct rlimit rl_zero; + int nnp_failed = 0; + + /* Set rlimits for completeness if possible. */ + rl_zero.rlim_cur = rl_zero.rlim_max = 0; + if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", + __func__, strerror(errno)); + if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", + __func__, strerror(errno)); + if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) + fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", + __func__, strerror(errno)); + +#ifdef SANDBOX_SECCOMP_FILTER_DEBUG + ssh_sandbox_child_debugging(); +#endif /* SANDBOX_SECCOMP_FILTER_DEBUG */ + + debug3("%s: setting PR_SET_NO_NEW_PRIVS", __func__); + if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) == -1) { + debug("%s: prctl(PR_SET_NO_NEW_PRIVS): %s", + __func__, strerror(errno)); + nnp_failed = 1; + } + debug3("%s: attaching seccomp filter program", __func__); + if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &preauth_program) == -1) + debug("%s: prctl(PR_SET_SECCOMP): %s", + __func__, strerror(errno)); + else if (nnp_failed) + fatal("%s: SECCOMP_MODE_FILTER activated but " + "PR_SET_NO_NEW_PRIVS failed", __func__); +} + +void +ssh_sandbox_parent_finish(struct ssh_sandbox *box) +{ + free(box); + debug3("%s: finished", __func__); +} + +void +ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) +{ + box->child_pid = child_pid; +} + +#endif /* SANDBOX_SECCOMP_FILTER */ diff --git a/sandbox-systrace.c b/sandbox-systrace.c index 5a39f4f..3830ed1 100644 --- a/sandbox-systrace.c +++ b/sandbox-systrace.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sandbox-systrace.c,v 1.4 2011/07/29 14:42:45 djm Exp $ */ +/* $OpenBSD: sandbox-systrace.c,v 1.17 2015/07/27 16:29:23 guenther Exp $ */ /* * Copyright (c) 2011 Damien Miller * @@ -20,21 +20,23 @@ #ifdef SANDBOX_SYSTRACE #include -#include #include #include #include +#include #include #include #include #include +#include #include #include #include #include #include +#include #include "atomicio.h" #include "log.h" @@ -48,46 +50,56 @@ struct sandbox_policy { /* Permitted syscalls in preauth. Unlisted syscalls get SYSTR_POLICY_KILL */ static const struct sandbox_policy preauth_policy[] = { - { SYS_open, SYSTR_POLICY_NEVER }, - - { SYS___sysctl, SYSTR_POLICY_PERMIT }, + { SYS_clock_gettime, SYSTR_POLICY_PERMIT }, { SYS_close, SYSTR_POLICY_PERMIT }, { SYS_exit, SYSTR_POLICY_PERMIT }, +#ifdef SYS_getentropy + /* OpenBSD 5.6 and newer use getentropy(2) to seed arc4random(3). */ + { SYS_getentropy, SYSTR_POLICY_PERMIT }, +#else + /* Previous releases used sysctl(3)'s kern.arnd variable. */ + { SYS___sysctl, SYSTR_POLICY_PERMIT }, +#endif { SYS_getpid, SYSTR_POLICY_PERMIT }, + { SYS_getpgid, SYSTR_POLICY_PERMIT }, { SYS_gettimeofday, SYSTR_POLICY_PERMIT }, +#ifdef SYS_kbind + { SYS_kbind, SYSTR_POLICY_PERMIT }, +#endif { SYS_madvise, SYSTR_POLICY_PERMIT }, { SYS_mmap, SYSTR_POLICY_PERMIT }, { SYS_mprotect, SYSTR_POLICY_PERMIT }, - { SYS_poll, SYSTR_POLICY_PERMIT }, + { SYS_mquery, SYSTR_POLICY_PERMIT }, { SYS_munmap, SYSTR_POLICY_PERMIT }, + { SYS_open, SYSTR_POLICY_NEVER }, + { SYS_poll, SYSTR_POLICY_PERMIT }, { SYS_read, SYSTR_POLICY_PERMIT }, { SYS_select, SYSTR_POLICY_PERMIT }, +#ifdef SYS_sendsyslog + { SYS_sendsyslog, SYSTR_POLICY_PERMIT }, +#endif + { SYS_shutdown, SYSTR_POLICY_PERMIT }, { SYS_sigprocmask, SYSTR_POLICY_PERMIT }, { SYS_write, SYSTR_POLICY_PERMIT }, { -1, -1 } }; struct ssh_sandbox { - int child_sock; - int parent_sock; int systrace_fd; pid_t child_pid; + void (*osigchld)(int); }; struct ssh_sandbox * -ssh_sandbox_init(void) +ssh_sandbox_init(struct monitor *monitor) { struct ssh_sandbox *box; - int s[2]; debug3("%s: preparing systrace sandbox", __func__); box = xcalloc(1, sizeof(*box)); - if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == -1) - fatal("%s: socketpair: %s", __func__, strerror(errno)); - box->child_sock = s[0]; - box->parent_sock = s[1]; box->systrace_fd = -1; box->child_pid = 0; + box->osigchld = signal(SIGCHLD, SIG_IGN); return box; } @@ -95,35 +107,38 @@ ssh_sandbox_init(void) void ssh_sandbox_child(struct ssh_sandbox *box) { - char whatever = 0; - - close(box->parent_sock); - /* Signal parent that we are ready */ debug3("%s: ready", __func__); - if (atomicio(vwrite, box->child_sock, &whatever, 1) != 1) - fatal("%s: write: %s", __func__, strerror(errno)); - /* Wait for parent to signal for us to go */ - if (atomicio(read, box->child_sock, &whatever, 1) != 1) - fatal("%s: read: %s", __func__, strerror(errno)); + signal(SIGCHLD, box->osigchld); + if (kill(getpid(), SIGSTOP) != 0) + fatal("%s: kill(%d, SIGSTOP)", __func__, getpid()); debug3("%s: started", __func__); - close(box->child_sock); } static void ssh_sandbox_parent(struct ssh_sandbox *box, pid_t child_pid, const struct sandbox_policy *allowed_syscalls) { - int dev_systrace, i, j, found; - char whatever = 0; + int dev_systrace, i, j, found, status; + pid_t pid; struct systrace_policy policy; + /* Wait for the child to send itself a SIGSTOP */ debug3("%s: wait for child %ld", __func__, (long)child_pid); + do { + pid = waitpid(child_pid, &status, WUNTRACED); + } while (pid == -1 && errno == EINTR); + signal(SIGCHLD, box->osigchld); + if (!WIFSTOPPED(status)) { + if (WIFSIGNALED(status)) + fatal("%s: child terminated with signal %d", + __func__, WTERMSIG(status)); + if (WIFEXITED(status)) + fatal("%s: child exited with status %d", + __func__, WEXITSTATUS(status)); + fatal("%s: child not stopped", __func__); + } + debug3("%s: child %ld stopped", __func__, (long)child_pid); box->child_pid = child_pid; - close(box->child_sock); - /* Wait for child to signal that it is ready */ - if (atomicio(read, box->parent_sock, &whatever, 1) != 1) - fatal("%s: read: %s", __func__, strerror(errno)); - debug3("%s: child %ld ready", __func__, (long)child_pid); /* Set up systracing of child */ if ((dev_systrace = open("/dev/systrace", O_RDONLY)) == -1) @@ -139,7 +154,7 @@ ssh_sandbox_parent(struct ssh_sandbox *box, pid_t child_pid, box->systrace_fd, child_pid, strerror(errno)); /* Allocate and assign policy */ - bzero(&policy, sizeof(policy)); + memset(&policy, 0, sizeof(policy)); policy.strp_op = SYSTR_POLICY_NEW; policy.strp_maxents = SYS_MAXSYSCALL; if (ioctl(box->systrace_fd, STRIOCPOLICY, &policy) == -1) @@ -174,9 +189,8 @@ ssh_sandbox_parent(struct ssh_sandbox *box, pid_t child_pid, /* Signal the child to start running */ debug3("%s: start child %ld", __func__, (long)child_pid); - if (atomicio(vwrite, box->parent_sock, &whatever, 1) != 1) - fatal("%s: write: %s", __func__, strerror(errno)); - close(box->parent_sock); + if (kill(box->child_pid, SIGCONT) != 0) + fatal("%s: kill(%d, SIGCONT)", __func__, box->child_pid); } void diff --git a/sc25519.c b/sc25519.c new file mode 100644 index 0000000..1568d9a --- /dev/null +++ b/sc25519.c @@ -0,0 +1,308 @@ +/* $OpenBSD: sc25519.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.c + */ + +#include "includes.h" + +#include "sc25519.h" + +/*Arithmetic modulo the group order m = 2^252 + 27742317777372353535851937790883648493 = 7237005577332262213973186563042994240857116359379907606001950938285454250989 */ + +static const crypto_uint32 m[32] = {0xED, 0xD3, 0xF5, 0x5C, 0x1A, 0x63, 0x12, 0x58, 0xD6, 0x9C, 0xF7, 0xA2, 0xDE, 0xF9, 0xDE, 0x14, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10}; + +static const crypto_uint32 mu[33] = {0x1B, 0x13, 0x2C, 0x0A, 0xA3, 0xE5, 0x9C, 0xED, 0xA7, 0x29, 0x63, 0x08, 0x5D, 0x21, 0x06, 0x21, + 0xEB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F}; + +static crypto_uint32 lt(crypto_uint32 a,crypto_uint32 b) /* 16-bit inputs */ +{ + unsigned int x = a; + x -= (unsigned int) b; /* 0..65535: no; 4294901761..4294967295: yes */ + x >>= 31; /* 0: no; 1: yes */ + return x; +} + +/* Reduce coefficients of r before calling reduce_add_sub */ +static void reduce_add_sub(sc25519 *r) +{ + crypto_uint32 pb = 0; + crypto_uint32 b; + crypto_uint32 mask; + int i; + unsigned char t[32]; + + for(i=0;i<32;i++) + { + pb += m[i]; + b = lt(r->v[i],pb); + t[i] = r->v[i]-pb+(b<<8); + pb = b; + } + mask = b - 1; + for(i=0;i<32;i++) + r->v[i] ^= mask & (r->v[i] ^ t[i]); +} + +/* Reduce coefficients of x before calling barrett_reduce */ +static void barrett_reduce(sc25519 *r, const crypto_uint32 x[64]) +{ + /* See HAC, Alg. 14.42 */ + int i,j; + crypto_uint32 q2[66]; + crypto_uint32 *q3 = q2 + 33; + crypto_uint32 r1[33]; + crypto_uint32 r2[33]; + crypto_uint32 carry; + crypto_uint32 pb = 0; + crypto_uint32 b; + + for (i = 0;i < 66;++i) q2[i] = 0; + for (i = 0;i < 33;++i) r2[i] = 0; + + for(i=0;i<33;i++) + for(j=0;j<33;j++) + if(i+j >= 31) q2[i+j] += mu[i]*x[j+31]; + carry = q2[31] >> 8; + q2[32] += carry; + carry = q2[32] >> 8; + q2[33] += carry; + + for(i=0;i<33;i++)r1[i] = x[i]; + for(i=0;i<32;i++) + for(j=0;j<33;j++) + if(i+j < 33) r2[i+j] += m[i]*q3[j]; + + for(i=0;i<32;i++) + { + carry = r2[i] >> 8; + r2[i+1] += carry; + r2[i] &= 0xff; + } + + for(i=0;i<32;i++) + { + pb += r2[i]; + b = lt(r1[i],pb); + r->v[i] = r1[i]-pb+(b<<8); + pb = b; + } + + /* XXX: Can it really happen that r<0?, See HAC, Alg 14.42, Step 3 + * If so: Handle it here! + */ + + reduce_add_sub(r); + reduce_add_sub(r); +} + +void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]) +{ + int i; + crypto_uint32 t[64]; + for(i=0;i<32;i++) t[i] = x[i]; + for(i=32;i<64;++i) t[i] = 0; + barrett_reduce(r, t); +} + +void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]) +{ + int i; + for(i=0;i<16;i++) r->v[i] = x[i]; +} + +void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]) +{ + int i; + crypto_uint32 t[64]; + for(i=0;i<64;i++) t[i] = x[i]; + barrett_reduce(r, t); +} + +void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x) +{ + int i; + for(i=0;i<16;i++) + r->v[i] = x->v[i]; + for(i=0;i<16;i++) + r->v[16+i] = 0; +} + +void sc25519_to32bytes(unsigned char r[32], const sc25519 *x) +{ + int i; + for(i=0;i<32;i++) r[i] = x->v[i]; +} + +int sc25519_iszero_vartime(const sc25519 *x) +{ + int i; + for(i=0;i<32;i++) + if(x->v[i] != 0) return 0; + return 1; +} + +int sc25519_isshort_vartime(const sc25519 *x) +{ + int i; + for(i=31;i>15;i--) + if(x->v[i] != 0) return 0; + return 1; +} + +int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y) +{ + int i; + for(i=31;i>=0;i--) + { + if(x->v[i] < y->v[i]) return 1; + if(x->v[i] > y->v[i]) return 0; + } + return 0; +} + +void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y) +{ + int i, carry; + for(i=0;i<32;i++) r->v[i] = x->v[i] + y->v[i]; + for(i=0;i<31;i++) + { + carry = r->v[i] >> 8; + r->v[i+1] += carry; + r->v[i] &= 0xff; + } + reduce_add_sub(r); +} + +void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y) +{ + crypto_uint32 b = 0; + crypto_uint32 t; + int i; + for(i=0;i<32;i++) + { + t = x->v[i] - y->v[i] - b; + r->v[i] = t & 255; + b = (t >> 8) & 1; + } +} + +void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y) +{ + int i,j,carry; + crypto_uint32 t[64]; + for(i=0;i<64;i++)t[i] = 0; + + for(i=0;i<32;i++) + for(j=0;j<32;j++) + t[i+j] += x->v[i] * y->v[j]; + + /* Reduce coefficients */ + for(i=0;i<63;i++) + { + carry = t[i] >> 8; + t[i+1] += carry; + t[i] &= 0xff; + } + + barrett_reduce(r, t); +} + +void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y) +{ + sc25519 t; + sc25519_from_shortsc(&t, y); + sc25519_mul(r, x, &t); +} + +void sc25519_window3(signed char r[85], const sc25519 *s) +{ + char carry; + int i; + for(i=0;i<10;i++) + { + r[8*i+0] = s->v[3*i+0] & 7; + r[8*i+1] = (s->v[3*i+0] >> 3) & 7; + r[8*i+2] = (s->v[3*i+0] >> 6) & 7; + r[8*i+2] ^= (s->v[3*i+1] << 2) & 7; + r[8*i+3] = (s->v[3*i+1] >> 1) & 7; + r[8*i+4] = (s->v[3*i+1] >> 4) & 7; + r[8*i+5] = (s->v[3*i+1] >> 7) & 7; + r[8*i+5] ^= (s->v[3*i+2] << 1) & 7; + r[8*i+6] = (s->v[3*i+2] >> 2) & 7; + r[8*i+7] = (s->v[3*i+2] >> 5) & 7; + } + r[8*i+0] = s->v[3*i+0] & 7; + r[8*i+1] = (s->v[3*i+0] >> 3) & 7; + r[8*i+2] = (s->v[3*i+0] >> 6) & 7; + r[8*i+2] ^= (s->v[3*i+1] << 2) & 7; + r[8*i+3] = (s->v[3*i+1] >> 1) & 7; + r[8*i+4] = (s->v[3*i+1] >> 4) & 7; + + /* Making it signed */ + carry = 0; + for(i=0;i<84;i++) + { + r[i] += carry; + r[i+1] += r[i] >> 3; + r[i] &= 7; + carry = r[i] >> 2; + r[i] -= carry<<3; + } + r[84] += carry; +} + +void sc25519_window5(signed char r[51], const sc25519 *s) +{ + char carry; + int i; + for(i=0;i<6;i++) + { + r[8*i+0] = s->v[5*i+0] & 31; + r[8*i+1] = (s->v[5*i+0] >> 5) & 31; + r[8*i+1] ^= (s->v[5*i+1] << 3) & 31; + r[8*i+2] = (s->v[5*i+1] >> 2) & 31; + r[8*i+3] = (s->v[5*i+1] >> 7) & 31; + r[8*i+3] ^= (s->v[5*i+2] << 1) & 31; + r[8*i+4] = (s->v[5*i+2] >> 4) & 31; + r[8*i+4] ^= (s->v[5*i+3] << 4) & 31; + r[8*i+5] = (s->v[5*i+3] >> 1) & 31; + r[8*i+6] = (s->v[5*i+3] >> 6) & 31; + r[8*i+6] ^= (s->v[5*i+4] << 2) & 31; + r[8*i+7] = (s->v[5*i+4] >> 3) & 31; + } + r[8*i+0] = s->v[5*i+0] & 31; + r[8*i+1] = (s->v[5*i+0] >> 5) & 31; + r[8*i+1] ^= (s->v[5*i+1] << 3) & 31; + r[8*i+2] = (s->v[5*i+1] >> 2) & 31; + + /* Making it signed */ + carry = 0; + for(i=0;i<50;i++) + { + r[i] += carry; + r[i+1] += r[i] >> 5; + r[i] &= 31; + carry = r[i] >> 4; + r[i] -= carry<<5; + } + r[50] += carry; +} + +void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2) +{ + int i; + for(i=0;i<31;i++) + { + r[4*i] = ( s1->v[i] & 3) ^ (( s2->v[i] & 3) << 2); + r[4*i+1] = ((s1->v[i] >> 2) & 3) ^ (((s2->v[i] >> 2) & 3) << 2); + r[4*i+2] = ((s1->v[i] >> 4) & 3) ^ (((s2->v[i] >> 4) & 3) << 2); + r[4*i+3] = ((s1->v[i] >> 6) & 3) ^ (((s2->v[i] >> 6) & 3) << 2); + } + r[124] = ( s1->v[31] & 3) ^ (( s2->v[31] & 3) << 2); + r[125] = ((s1->v[31] >> 2) & 3) ^ (((s2->v[31] >> 2) & 3) << 2); + r[126] = ((s1->v[31] >> 4) & 3) ^ (((s2->v[31] >> 4) & 3) << 2); +} diff --git a/sc25519.h b/sc25519.h new file mode 100644 index 0000000..a2c15d5 --- /dev/null +++ b/sc25519.h @@ -0,0 +1,80 @@ +/* $OpenBSD: sc25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, + * Peter Schwabe, Bo-Yin Yang. + * Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.h + */ + +#ifndef SC25519_H +#define SC25519_H + +#include "crypto_api.h" + +#define sc25519 crypto_sign_ed25519_ref_sc25519 +#define shortsc25519 crypto_sign_ed25519_ref_shortsc25519 +#define sc25519_from32bytes crypto_sign_ed25519_ref_sc25519_from32bytes +#define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes +#define sc25519_from64bytes crypto_sign_ed25519_ref_sc25519_from64bytes +#define sc25519_from_shortsc crypto_sign_ed25519_ref_sc25519_from_shortsc +#define sc25519_to32bytes crypto_sign_ed25519_ref_sc25519_to32bytes +#define sc25519_iszero_vartime crypto_sign_ed25519_ref_sc25519_iszero_vartime +#define sc25519_isshort_vartime crypto_sign_ed25519_ref_sc25519_isshort_vartime +#define sc25519_lt_vartime crypto_sign_ed25519_ref_sc25519_lt_vartime +#define sc25519_add crypto_sign_ed25519_ref_sc25519_add +#define sc25519_sub_nored crypto_sign_ed25519_ref_sc25519_sub_nored +#define sc25519_mul crypto_sign_ed25519_ref_sc25519_mul +#define sc25519_mul_shortsc crypto_sign_ed25519_ref_sc25519_mul_shortsc +#define sc25519_window3 crypto_sign_ed25519_ref_sc25519_window3 +#define sc25519_window5 crypto_sign_ed25519_ref_sc25519_window5 +#define sc25519_2interleave2 crypto_sign_ed25519_ref_sc25519_2interleave2 + +typedef struct +{ + crypto_uint32 v[32]; +} +sc25519; + +typedef struct +{ + crypto_uint32 v[16]; +} +shortsc25519; + +void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]); + +void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]); + +void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]); + +void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x); + +void sc25519_to32bytes(unsigned char r[32], const sc25519 *x); + +int sc25519_iszero_vartime(const sc25519 *x); + +int sc25519_isshort_vartime(const sc25519 *x); + +int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y); + +void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y); + +void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y); + +void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y); + +void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y); + +/* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3 + * with r[i] in {-4,...,3} + */ +void sc25519_window3(signed char r[85], const sc25519 *s); + +/* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5 + * with r[i] in {-16,...,15} + */ +void sc25519_window5(signed char r[51], const sc25519 *s); + +void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2); + +#endif diff --git a/scp.c b/scp.c index 18b2597..593fe89 100644 --- a/scp.c +++ b/scp.c @@ -1,4 +1,4 @@ -/* $OpenBSD: scp.c,v 1.170 2010/12/09 14:13:33 jmc Exp $ */ +/* $OpenBSD: scp.c,v 1.182 2015/04/24 01:36:00 deraadt Exp $ */ /* * scp - secure remote copy. This is basically patched BSD rcp which * uses ssh to do the data transfer (instead of using rcmd). @@ -95,6 +95,7 @@ #include #include #include +#include #include #include #include @@ -103,7 +104,7 @@ #include #include #include -#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) +#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) #include #endif @@ -550,6 +551,24 @@ scpio(void *_cnt, size_t s) return 0; } +static int +do_times(int fd, int verb, const struct stat *sb) +{ + /* strlen(2^64) == 20; strlen(10^6) == 7 */ + char buf[(20 + 7 + 2) * 2 + 2]; + + (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n", + (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime), + (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime)); + if (verb) { + fprintf(stderr, "File mtime %lld atime %lld\n", + (long long)sb->st_mtime, (long long)sb->st_atime); + fprintf(stderr, "Sending file timestamps: %s", buf); + } + (void) atomicio(vwrite, fd, buf, strlen(buf)); + return (response()); +} + void toremote(char *targ, int argc, char **argv) { @@ -578,7 +597,7 @@ toremote(char *targ, int argc, char **argv) } if (tuser != NULL && !okname(tuser)) { - xfree(arg); + free(arg); return; } @@ -601,15 +620,17 @@ toremote(char *targ, int argc, char **argv) host = cleanhostname(argv[i]); suser = NULL; } - xasprintf(&bp, "%s -f -- %s", cmd, src); + xasprintf(&bp, "%s -f %s%s", cmd, + *src == '-' ? "-- " : "", src); if (do_cmd(host, suser, bp, &remin, &remout) < 0) exit(1); - (void) xfree(bp); + free(bp); host = cleanhostname(thost); - xasprintf(&bp, "%s -t -- %s", cmd, targ); + xasprintf(&bp, "%s -t %s%s", cmd, + *targ == '-' ? "-- " : "", targ); if (do_cmd2(host, tuser, bp, remin, remout) < 0) exit(1); - (void) xfree(bp); + free(bp); (void) close(remin); (void) close(remout); remin = remout = -1; @@ -652,19 +673,20 @@ toremote(char *targ, int argc, char **argv) errs = 1; } else { /* local to remote */ if (remin == -1) { - xasprintf(&bp, "%s -t -- %s", cmd, targ); + xasprintf(&bp, "%s -t %s%s", cmd, + *targ == '-' ? "-- " : "", targ); host = cleanhostname(thost); if (do_cmd(host, tuser, bp, &remin, &remout) < 0) exit(1); if (response() < 0) exit(1); - (void) xfree(bp); + free(bp); } source(1, argv + i); } } - xfree(arg); + free(arg); } void @@ -705,13 +727,14 @@ tolocal(int argc, char **argv) suser = pwd->pw_name; } host = cleanhostname(host); - xasprintf(&bp, "%s -f -- %s", cmd, src); + xasprintf(&bp, "%s -f %s%s", + cmd, *src == '-' ? "-- " : "", src); if (do_cmd(host, suser, bp, &remin, &remout) < 0) { - (void) xfree(bp); + free(bp); ++errs; continue; } - xfree(bp); + free(bp); sink(1, argv + argc - 1); (void) close(remin); remin = remout = -1; @@ -725,9 +748,9 @@ source(int argc, char **argv) static BUF buffer; BUF *bp; off_t i, statbytes; - size_t amt; + size_t amt, nr; int fd = -1, haderr, indx; - char *last, *name, buf[2048], encname[MAXPATHLEN]; + char *last, *name, buf[2048], encname[PATH_MAX]; int len; for (indx = 0; indx < argc; ++indx) { @@ -770,21 +793,7 @@ syserr: run_err("%s: %s", name, strerror(errno)); ++last; curfile = last; if (pflag) { - /* - * Make it compatible with possible future - * versions expecting microseconds. - */ - (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n", - (u_long) (stb.st_mtime < 0 ? 0 : stb.st_mtime), - (u_long) (stb.st_atime < 0 ? 0 : stb.st_atime)); - if (verbose_mode) { - fprintf(stderr, "File mtime %ld atime %ld\n", - (long)stb.st_mtime, (long)stb.st_atime); - fprintf(stderr, "Sending file timestamps: %s", - buf); - } - (void) atomicio(vwrite, remout, buf, strlen(buf)); - if (response() < 0) + if (do_times(remout, verbose_mode, &stb) < 0) goto next; } #define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO) @@ -812,12 +821,16 @@ next: if (fd != -1) { if (i + (off_t)amt > stb.st_size) amt = stb.st_size - i; if (!haderr) { - if (atomicio(read, fd, bp->buf, amt) != amt) + if ((nr = atomicio(read, fd, + bp->buf, amt)) != amt) { haderr = errno; + memset(bp->buf + nr, 0, amt - nr); + } } /* Keep writing after error to retain sync */ if (haderr) { (void)atomicio(vwrite, remout, bp->buf, amt); + memset(bp->buf, 0, amt); continue; } if (atomicio6(vwrite, remout, bp->buf, amt, scpio, @@ -846,7 +859,7 @@ rsource(char *name, struct stat *statp) { DIR *dirp; struct dirent *dp; - char *last, *vect[1], path[1100]; + char *last, *vect[1], path[PATH_MAX]; if (!(dirp = opendir(name))) { run_err("%s: %s", name, strerror(errno)); @@ -858,11 +871,7 @@ rsource(char *name, struct stat *statp) else last++; if (pflag) { - (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n", - (u_long) statp->st_mtime, - (u_long) statp->st_atime); - (void) atomicio(vwrite, remout, path, strlen(path)); - if (response() < 0) { + if (do_times(remout, verbose_mode, statp) < 0) { closedir(dirp); return; } @@ -908,6 +917,7 @@ sink(int argc, char **argv) int amt, exists, first, ofd; mode_t mode, omode, mask; off_t size, statbytes; + unsigned long long ull; int setimes, targisdir, wrerrno = 0; char ch, *cp, *np, *targ, *why, *vect[1], buf[2048]; struct timeval tv[2]; @@ -966,17 +976,31 @@ sink(int argc, char **argv) if (*cp == 'T') { setimes++; cp++; - mtime.tv_sec = strtol(cp, &cp, 10); + if (!isdigit((unsigned char)*cp)) + SCREWUP("mtime.sec not present"); + ull = strtoull(cp, &cp, 10); if (!cp || *cp++ != ' ') SCREWUP("mtime.sec not delimited"); + if ((time_t)ull < 0 || + (unsigned long long)(time_t)ull != ull) + setimes = 0; /* out of range */ + mtime.tv_sec = ull; mtime.tv_usec = strtol(cp, &cp, 10); - if (!cp || *cp++ != ' ') + if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 || + mtime.tv_usec > 999999) SCREWUP("mtime.usec not delimited"); - atime.tv_sec = strtol(cp, &cp, 10); + if (!isdigit((unsigned char)*cp)) + SCREWUP("atime.sec not present"); + ull = strtoull(cp, &cp, 10); if (!cp || *cp++ != ' ') SCREWUP("atime.sec not delimited"); + if ((time_t)ull < 0 || + (unsigned long long)(time_t)ull != ull) + setimes = 0; /* out of range */ + atime.tv_sec = ull; atime.tv_usec = strtol(cp, &cp, 10); - if (!cp || *cp++ != '\0') + if (!cp || *cp++ != '\0' || atime.tv_usec < 0 || + atime.tv_usec > 999999) SCREWUP("atime.usec not delimited"); (void) atomicio(vwrite, remout, "", 1); continue; @@ -1004,7 +1028,7 @@ sink(int argc, char **argv) if (*cp++ != ' ') SCREWUP("mode not delimited"); - for (size = 0; isdigit(*cp);) + for (size = 0; isdigit((unsigned char)*cp);) size = size * 10 + (*cp++ - '0'); if (*cp++ != ' ') SCREWUP("size not delimited"); @@ -1019,8 +1043,7 @@ sink(int argc, char **argv) need = strlen(targ) + strlen(cp) + 250; if (need > cursize) { - if (namebuf) - xfree(namebuf); + free(namebuf); namebuf = xmalloc(need); cursize = need; } @@ -1059,12 +1082,11 @@ sink(int argc, char **argv) } if (mod_flag) (void) chmod(vect[0], mode); - if (vect[0]) - xfree(vect[0]); + free(vect[0]); continue; } omode = mode; - mode |= S_IWRITE; + mode |= S_IWUSR; if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) { bad: run_err("%s: %s", np, strerror(errno)); continue; @@ -1270,7 +1292,7 @@ okname(char *cp0) c = (int)*cp; if (c & 0200) goto bad; - if (!isalpha(c) && !isdigit(c)) { + if (!isalpha(c) && !isdigit((unsigned char)c)) { switch (c) { case '\'': case '"': @@ -1311,7 +1333,7 @@ allocbuf(BUF *bp, int fd, int blksize) if (bp->buf == NULL) bp->buf = xmalloc(size); else - bp->buf = xrealloc(bp->buf, 1, size); + bp->buf = xreallocarray(bp->buf, 1, size); memset(bp->buf, 0, size); bp->cnt = size; return (bp); @@ -1321,7 +1343,7 @@ void lostconn(int signo) { if (!iamremote) - write(STDERR_FILENO, "lost connection\n", 16); + (void)write(STDERR_FILENO, "lost connection\n", 16); if (signo) _exit(1); else diff --git a/servconf.c b/servconf.c index 5e6c4ef..d60779c 100644 --- a/servconf.c +++ b/servconf.c @@ -1,4 +1,5 @@ -/* $OpenBSD: servconf.c,v 1.222 2011/06/22 21:57:01 djm Exp $ */ + +/* $OpenBSD: servconf.c,v 1.280 2015/08/06 14:53:21 deraadt Exp $ */ /* * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland * All rights reserved @@ -28,6 +29,7 @@ #include #include +#include #include #include #include @@ -35,18 +37,22 @@ #include #include #include +#include #include #include +#ifdef HAVE_UTIL_H +#include +#endif #include "openbsd-compat/sys-queue.h" #include "xmalloc.h" #include "ssh.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" #include "compat.h" #include "pathnames.h" -#include "misc.h" #include "cipher.h" #include "key.h" #include "kex.h" @@ -54,6 +60,12 @@ #include "match.h" #include "channels.h" #include "groupaccess.h" +#include "canohost.h" +#include "packet.h" +#include "hostfile.h" +#include "auth.h" +#include "myproposal.h" +#include "digest.h" static void add_listen_addr(ServerOptions *, char *, int); static void add_one_listen_addr(ServerOptions *, char *, int); @@ -75,10 +87,13 @@ initialize_server_options(ServerOptions *options) /* Standard Options */ options->num_ports = 0; options->ports_from_cmdline = 0; + options->queued_listen_addrs = NULL; + options->num_queued_listens = 0; options->listen_addrs = NULL; options->address_family = -1; options->num_host_key_files = 0; options->num_host_cert_files = 0; + options->host_key_agent = NULL; options->pid_file = NULL; options->server_key_bits = -1; options->login_grace_time = -1; @@ -91,6 +106,8 @@ initialize_server_options(ServerOptions *options) options->x11_forwarding = -1; options->x11_display_offset = -1; options->x11_use_localhost = -1; + options->permit_tty = -1; + options->permit_user_rc = -1; options->xauth_location = NULL; options->strict_modes = -1; options->tcp_keep_alive = -1; @@ -99,14 +116,18 @@ initialize_server_options(ServerOptions *options) options->rhosts_rsa_authentication = -1; options->hostbased_authentication = -1; options->hostbased_uses_name_from_packet_only = -1; + options->hostbased_key_types = NULL; + options->hostkeyalgorithms = NULL; options->rsa_authentication = -1; options->pubkey_authentication = -1; + options->pubkey_key_types = NULL; options->kerberos_authentication = -1; options->kerberos_or_local_passwd = -1; options->kerberos_ticket_cleanup = -1; options->kerberos_get_afs_token = -1; options->gss_authentication=-1; options->gss_cleanup_creds = -1; + options->gss_strict_acceptor = -1; options->password_authentication = -1; options->kbd_interactive_authentication = -1; options->challenge_response_authentication = -1; @@ -114,7 +135,10 @@ initialize_server_options(ServerOptions *options) options->permit_user_env = -1; options->use_login = -1; options->compression = -1; + options->rekey_limit = -1; + options->rekey_interval = -1; options->allow_tcp_forwarding = -1; + options->allow_streamlocal_forwarding = -1; options->allow_agent_forwarding = -1; options->num_allow_users = 0; options->num_deny_users = 0; @@ -124,7 +148,9 @@ initialize_server_options(ServerOptions *options) options->macs = NULL; options->kex_algorithms = NULL; options->protocol = SSH_PROTO_UNKNOWN; - options->gateway_ports = -1; + options->fwd_opts.gateway_ports = -1; + options->fwd_opts.streamlocal_bind_mask = (mode_t)-1; + options->fwd_opts.streamlocal_bind_unlink = -1; options->num_subsystems = 0; options->max_startups_begin = -1; options->max_startups_rate = -1; @@ -141,20 +167,34 @@ initialize_server_options(ServerOptions *options) options->num_permitted_opens = -1; options->adm_forced_command = NULL; options->chroot_directory = NULL; - options->zero_knowledge_password_authentication = -1; + options->authorized_keys_command = NULL; + options->authorized_keys_command_user = NULL; options->revoked_keys_file = NULL; options->trusted_user_ca_keys = NULL; options->authorized_principals_file = NULL; + options->authorized_principals_command = NULL; + options->authorized_principals_command_user = NULL; options->ip_qos_interactive = -1; options->ip_qos_bulk = -1; + options->version_addendum = NULL; + options->fingerprint_hash = -1; #ifdef WIN32_FIXME options->i_am_a_fake_fork = 0; #endif } +/* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */ +static int +option_clear_or_none(const char *o) +{ + return o == NULL || strcasecmp(o, "none") == 0; +} + void fill_default_server_options(ServerOptions *options) { + int i; + /* Portable-specific options */ if (options->use_pam == -1) options->use_pam = 0; @@ -176,16 +216,19 @@ fill_default_server_options(ServerOptions *options) options->host_key_files[options->num_host_key_files++] = _PATH_HOST_ECDSA_KEY_FILE; #endif + options->host_key_files[options->num_host_key_files++] = + _PATH_HOST_ED25519_KEY_FILE; } } - /* No certificates by default */ if (options->num_ports == 0) options->ports[options->num_ports++] = SSH_DEFAULT_PORT; + if (options->address_family == -1) + options->address_family = AF_UNSPEC; if (options->listen_addrs == NULL) add_listen_addr(options, NULL, 0); if (options->pid_file == NULL) - options->pid_file = _PATH_SSH_DAEMON_PID_FILE; + options->pid_file = xstrdup(_PATH_SSH_DAEMON_PID_FILE); if (options->server_key_bits == -1) options->server_key_bits = 1024; if (options->login_grace_time == -1) @@ -193,7 +236,7 @@ fill_default_server_options(ServerOptions *options) if (options->key_regeneration_time == -1) options->key_regeneration_time = 3600; if (options->permit_root_login == PERMIT_NOT_SET) - options->permit_root_login = PERMIT_YES; + options->permit_root_login = PERMIT_NO_PASSWD; if (options->ignore_rhosts == -1) options->ignore_rhosts = 1; if (options->ignore_user_known_hosts == -1) @@ -209,7 +252,11 @@ fill_default_server_options(ServerOptions *options) if (options->x11_use_localhost == -1) options->x11_use_localhost = 1; if (options->xauth_location == NULL) - options->xauth_location = _PATH_XAUTH; + options->xauth_location = xstrdup(_PATH_XAUTH); + if (options->permit_tty == -1) + options->permit_tty = 1; + if (options->permit_user_rc == -1) + options->permit_user_rc = 1; if (options->strict_modes == -1) options->strict_modes = 1; if (options->tcp_keep_alive == -1) @@ -224,6 +271,8 @@ fill_default_server_options(ServerOptions *options) options->hostbased_authentication = 0; if (options->hostbased_uses_name_from_packet_only == -1) options->hostbased_uses_name_from_packet_only = 0; + if (options->hostkeyalgorithms == NULL) + options->hostkeyalgorithms = xstrdup(KEX_DEFAULT_PK_ALG); if (options->rsa_authentication == -1) options->rsa_authentication = 1; if (options->pubkey_authentication == -1) @@ -240,6 +289,8 @@ fill_default_server_options(ServerOptions *options) options->gss_authentication = 0; if (options->gss_cleanup_creds == -1) options->gss_cleanup_creds = 1; + if (options->gss_strict_acceptor == -1) + options->gss_strict_acceptor = 0; if (options->password_authentication == -1) options->password_authentication = 1; if (options->kbd_interactive_authentication == -1) @@ -254,24 +305,30 @@ fill_default_server_options(ServerOptions *options) options->use_login = 0; if (options->compression == -1) options->compression = COMP_DELAYED; + if (options->rekey_limit == -1) + options->rekey_limit = 0; + if (options->rekey_interval == -1) + options->rekey_interval = 0; if (options->allow_tcp_forwarding == -1) - options->allow_tcp_forwarding = 1; + options->allow_tcp_forwarding = FORWARD_ALLOW; + if (options->allow_streamlocal_forwarding == -1) + options->allow_streamlocal_forwarding = FORWARD_ALLOW; if (options->allow_agent_forwarding == -1) options->allow_agent_forwarding = 1; - if (options->gateway_ports == -1) - options->gateway_ports = 0; + if (options->fwd_opts.gateway_ports == -1) + options->fwd_opts.gateway_ports = 0; if (options->max_startups == -1) - options->max_startups = 10; + options->max_startups = 100; if (options->max_startups_rate == -1) - options->max_startups_rate = 100; /* 100% */ + options->max_startups_rate = 30; /* 30% */ if (options->max_startups_begin == -1) - options->max_startups_begin = options->max_startups; + options->max_startups_begin = 10; if (options->max_authtries == -1) options->max_authtries = DEFAULT_AUTH_FAIL_MAX; if (options->max_sessions == -1) options->max_sessions = DEFAULT_SESSIONS_MAX; if (options->use_dns == -1) - options->use_dns = 1; + options->use_dns = 0; if (options->client_alive_interval == -1) options->client_alive_interval = 0; if (options->client_alive_count_max == -1) @@ -284,16 +341,50 @@ fill_default_server_options(ServerOptions *options) } if (options->permit_tun == -1) options->permit_tun = SSH_TUNMODE_NO; - if (options->zero_knowledge_password_authentication == -1) - options->zero_knowledge_password_authentication = 0; if (options->ip_qos_interactive == -1) options->ip_qos_interactive = IPTOS_LOWDELAY; if (options->ip_qos_bulk == -1) options->ip_qos_bulk = IPTOS_THROUGHPUT; + if (options->version_addendum == NULL) + options->version_addendum = xstrdup(""); + if (options->fwd_opts.streamlocal_bind_mask == (mode_t)-1) + options->fwd_opts.streamlocal_bind_mask = 0177; + if (options->fwd_opts.streamlocal_bind_unlink == -1) + options->fwd_opts.streamlocal_bind_unlink = 0; + if (options->fingerprint_hash == -1) + options->fingerprint_hash = SSH_FP_HASH_DEFAULT; + + if (kex_assemble_names(KEX_SERVER_ENCRYPT, &options->ciphers) != 0 || + kex_assemble_names(KEX_SERVER_MAC, &options->macs) != 0 || + kex_assemble_names(KEX_SERVER_KEX, &options->kex_algorithms) != 0 || + kex_assemble_names(KEX_DEFAULT_PK_ALG, + &options->hostbased_key_types) != 0 || + kex_assemble_names(KEX_DEFAULT_PK_ALG, + &options->pubkey_key_types) != 0) + fatal("%s: kex_assemble_names failed", __func__); /* Turn privilege separation on by default */ if (use_privsep == -1) - use_privsep = PRIVSEP_ON; + use_privsep = PRIVSEP_NOSANDBOX; + +#define CLEAR_ON_NONE(v) \ + do { \ + if (option_clear_or_none(v)) { \ + free(v); \ + v = NULL; \ + } \ + } while(0) + CLEAR_ON_NONE(options->pid_file); + CLEAR_ON_NONE(options->xauth_location); + CLEAR_ON_NONE(options->banner); + CLEAR_ON_NONE(options->trusted_user_ca_keys); + CLEAR_ON_NONE(options->revoked_keys_file); + CLEAR_ON_NONE(options->authorized_principals_file); + for (i = 0; i < options->num_host_key_files; i++) + CLEAR_ON_NONE(options->host_key_files[i]); + for (i = 0; i < options->num_host_cert_files; i++) + CLEAR_ON_NONE(options->host_cert_files[i]); +#undef CLEAR_ON_NONE #ifndef HAVE_MMAP if (use_privsep && options->compression == 1) { @@ -315,8 +406,8 @@ typedef enum { sPAMLibrary, #endif /* RUNTIME_LIBPAM */ /* Standard Options */ - sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, sKeyRegenerationTime, - sPermitRootLogin, sLogFacility, sLogLevel, + sPort, sHostKeyFile, sServerKeyBits, sLoginGraceTime, + sKeyRegenerationTime, sPermitRootLogin, sLogFacility, sLogLevel, sRhostsRSAAuthentication, sRSAAuthentication, sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup, sKerberosGetAFSToken, @@ -325,21 +416,28 @@ typedef enum { sListenAddress, sAddressFamily, sPrintMotd, sPrintLastLog, sIgnoreRhosts, sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost, - sStrictModes, sEmptyPasswd, sTCPKeepAlive, + sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive, sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression, - sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, + sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups, sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile, - sGatewayPorts, sPubkeyAuthentication, sXAuthLocation, sSubsystem, - sMaxStartups, sMaxAuthTries, sMaxSessions, + sGatewayPorts, sPubkeyAuthentication, sPubkeyAcceptedKeyTypes, + sXAuthLocation, sSubsystem, sMaxStartups, sMaxAuthTries, sMaxSessions, sBanner, sUseDNS, sHostbasedAuthentication, - sHostbasedUsesNameFromPacketOnly, sClientAliveInterval, - sClientAliveCountMax, sAuthorizedKeysFile, - sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel, + sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes, + sHostKeyAlgorithms, + sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile, + sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor, + sAcceptEnv, sPermitTunnel, sMatch, sPermitOpen, sForceCommand, sChrootDirectory, sUsePrivilegeSeparation, sAllowAgentForwarding, - sZeroKnowledgePasswordAuthentication, sHostCertificate, + sHostCertificate, sRevokedKeys, sTrustedUserCAKeys, sAuthorizedPrincipalsFile, - sKexAlgorithms, sIPQoS, + sAuthorizedPrincipalsCommand, sAuthorizedPrincipalsCommandUser, + sKexAlgorithms, sIPQoS, sVersionAddendum, + sAuthorizedKeysCommand, sAuthorizedKeysCommandUser, + sAuthenticationMethods, sHostKeyAgent, sPermitUserRC, + sStreamLocalBindMask, sStreamLocalBindUnlink, + sAllowStreamLocalForwarding, sFingerprintHash, sDeprecated, sUnsupported } ServerOpCodes; @@ -352,7 +450,7 @@ static struct { const char *name; ServerOpCodes opcode; u_int flags; -} keywords[] = { +} keywords[] = { /* Portable-specific options */ #ifdef USE_PAM { "usepam", sUsePAM, SSHCFG_GLOBAL }, @@ -370,6 +468,7 @@ static struct { { "port", sPort, SSHCFG_GLOBAL }, { "hostkey", sHostKeyFile, SSHCFG_GLOBAL }, { "hostdsakey", sHostKeyFile, SSHCFG_GLOBAL }, /* alias */ + { "hostkeyagent", sHostKeyAgent, SSHCFG_GLOBAL }, { "pidfile", sPidFile, SSHCFG_GLOBAL }, { "serverkeybits", sServerKeyBits, SSHCFG_GLOBAL }, { "logingracetime", sLoginGraceTime, SSHCFG_GLOBAL }, @@ -381,8 +480,11 @@ static struct { { "rhostsrsaauthentication", sRhostsRSAAuthentication, SSHCFG_ALL }, { "hostbasedauthentication", sHostbasedAuthentication, SSHCFG_ALL }, { "hostbasedusesnamefrompacketonly", sHostbasedUsesNameFromPacketOnly, SSHCFG_ALL }, + { "hostbasedacceptedkeytypes", sHostbasedAcceptedKeyTypes, SSHCFG_ALL }, + { "hostkeyalgorithms", sHostKeyAlgorithms, SSHCFG_GLOBAL }, { "rsaauthentication", sRSAAuthentication, SSHCFG_ALL }, { "pubkeyauthentication", sPubkeyAuthentication, SSHCFG_ALL }, + { "pubkeyacceptedkeytypes", sPubkeyAcceptedKeyTypes, SSHCFG_ALL }, { "dsaauthentication", sPubkeyAuthentication, SSHCFG_GLOBAL }, /* alias */ #ifdef KRB5 { "kerberosauthentication", sKerberosAuthentication, SSHCFG_ALL }, @@ -404,19 +506,16 @@ static struct { #ifdef GSSAPI { "gssapiauthentication", sGssAuthentication, SSHCFG_ALL }, { "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL }, + { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL }, #else { "gssapiauthentication", sUnsupported, SSHCFG_ALL }, { "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL }, + { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL }, #endif { "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL }, { "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL }, { "challengeresponseauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, { "skeyauthentication", sChallengeResponseAuthentication, SSHCFG_GLOBAL }, /* alias */ -#ifdef JPAKE - { "zeroknowledgepasswordauthentication", sZeroKnowledgePasswordAuthentication, SSHCFG_ALL }, -#else - { "zeroknowledgepasswordauthentication", sUnsupported, SSHCFG_ALL }, -#endif { "checkmail", sDeprecated, SSHCFG_GLOBAL }, { "listenaddress", sListenAddress, SSHCFG_GLOBAL }, { "addressfamily", sAddressFamily, SSHCFG_GLOBAL }, @@ -433,14 +532,15 @@ static struct { { "permituserenvironment", sPermitUserEnvironment, SSHCFG_GLOBAL }, { "uselogin", sUseLogin, SSHCFG_GLOBAL }, { "compression", sCompression, SSHCFG_GLOBAL }, + { "rekeylimit", sRekeyLimit, SSHCFG_ALL }, { "tcpkeepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, { "keepalive", sTCPKeepAlive, SSHCFG_GLOBAL }, /* obsolete alias */ { "allowtcpforwarding", sAllowTcpForwarding, SSHCFG_ALL }, { "allowagentforwarding", sAllowAgentForwarding, SSHCFG_ALL }, - { "allowusers", sAllowUsers, SSHCFG_GLOBAL }, - { "denyusers", sDenyUsers, SSHCFG_GLOBAL }, - { "allowgroups", sAllowGroups, SSHCFG_GLOBAL }, - { "denygroups", sDenyGroups, SSHCFG_GLOBAL }, + { "allowusers", sAllowUsers, SSHCFG_ALL }, + { "denyusers", sDenyUsers, SSHCFG_ALL }, + { "allowgroups", sAllowGroups, SSHCFG_ALL }, + { "denygroups", sDenyGroups, SSHCFG_ALL }, { "ciphers", sCiphers, SSHCFG_GLOBAL }, { "macs", sMacs, SSHCFG_GLOBAL }, { "protocol", sProtocol, SSHCFG_GLOBAL }, @@ -458,8 +558,10 @@ static struct { { "authorizedkeysfile", sAuthorizedKeysFile, SSHCFG_ALL }, { "authorizedkeysfile2", sDeprecated, SSHCFG_ALL }, { "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL}, - { "acceptenv", sAcceptEnv, SSHCFG_GLOBAL }, + { "acceptenv", sAcceptEnv, SSHCFG_ALL }, { "permittunnel", sPermitTunnel, SSHCFG_ALL }, + { "permittty", sPermitTTY, SSHCFG_ALL }, + { "permituserrc", sPermitUserRC, SSHCFG_ALL }, { "match", sMatch, SSHCFG_ALL }, { "permitopen", sPermitOpen, SSHCFG_ALL }, { "forcecommand", sForceCommand, SSHCFG_ALL }, @@ -470,6 +572,16 @@ static struct { { "authorizedprincipalsfile", sAuthorizedPrincipalsFile, SSHCFG_ALL }, { "kexalgorithms", sKexAlgorithms, SSHCFG_GLOBAL }, { "ipqos", sIPQoS, SSHCFG_ALL }, + { "authorizedkeyscommand", sAuthorizedKeysCommand, SSHCFG_ALL }, + { "authorizedkeyscommanduser", sAuthorizedKeysCommandUser, SSHCFG_ALL }, + { "authorizedprincipalscommand", sAuthorizedPrincipalsCommand, SSHCFG_ALL }, + { "authorizedprincipalscommanduser", sAuthorizedPrincipalsCommandUser, SSHCFG_ALL }, + { "versionaddendum", sVersionAddendum, SSHCFG_GLOBAL }, + { "authenticationmethods", sAuthenticationMethods, SSHCFG_ALL }, + { "streamlocalbindmask", sStreamLocalBindMask, SSHCFG_ALL }, + { "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL }, + { "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL }, + { "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL }, { NULL, sBadOption, 0 } }; @@ -508,8 +620,10 @@ parse_token(const char *cp, const char *filename, char * derelativise_path(const char *path) { - char *expanded, *ret, cwd[MAXPATHLEN]; + char *expanded, *ret, cwd[PATH_MAX]; + if (strcasecmp(path, "none") == 0) + return xstrdup("none"); expanded = tilde_expand_filename(path, getuid()); #ifdef WIN32_FIXME if (expanded[1] == ':') @@ -520,7 +634,7 @@ derelativise_path(const char *path) if (getcwd(cwd, sizeof(cwd)) == NULL) fatal("%s: getcwd: %s", __func__, strerror(errno)); xasprintf(&ret, "%s/%s", cwd, expanded); - xfree(expanded); + free(expanded); return ret; } @@ -529,10 +643,6 @@ add_listen_addr(ServerOptions *options, char *addr, int port) { u_int i; - if (options->num_ports == 0) - options->ports[options->num_ports++] = SSH_DEFAULT_PORT; - if (options->address_family == -1) - options->address_family = AF_UNSPEC; if (port == 0) for (i = 0; i < options->num_ports; i++) add_one_listen_addr(options, addr, options->ports[i]); @@ -562,6 +672,65 @@ add_one_listen_addr(ServerOptions *options, char *addr, int port) options->listen_addrs = aitop; } +/* + * Queue a ListenAddress to be processed once we have all of the Ports + * and AddressFamily options. + */ +static void +queue_listen_addr(ServerOptions *options, char *addr, int port) +{ + options->queued_listen_addrs = xreallocarray( + options->queued_listen_addrs, options->num_queued_listens + 1, + sizeof(addr)); + options->queued_listen_ports = xreallocarray( + options->queued_listen_ports, options->num_queued_listens + 1, + sizeof(port)); + options->queued_listen_addrs[options->num_queued_listens] = + xstrdup(addr); + options->queued_listen_ports[options->num_queued_listens] = port; + options->num_queued_listens++; +} + +/* + * Process queued (text) ListenAddress entries. + */ +static void +process_queued_listen_addrs(ServerOptions *options) +{ + u_int i; + + if (options->num_ports == 0) + options->ports[options->num_ports++] = SSH_DEFAULT_PORT; + if (options->address_family == -1) + options->address_family = AF_UNSPEC; + + for (i = 0; i < options->num_queued_listens; i++) { + add_listen_addr(options, options->queued_listen_addrs[i], + options->queued_listen_ports[i]); + free(options->queued_listen_addrs[i]); + options->queued_listen_addrs[i] = NULL; + } + free(options->queued_listen_addrs); + options->queued_listen_addrs = NULL; + free(options->queued_listen_ports); + options->queued_listen_ports = NULL; + options->num_queued_listens = 0; +} + +struct connection_info * +get_connection_info(int populate, int use_dns) +{ + static struct connection_info ci; + + if (!populate) + return &ci; + ci.host = get_canonical_hostname(use_dns); + ci.address = get_remote_ipaddr(); + ci.laddress = get_local_ipaddr(packet_get_connection_in()); + ci.lport = get_local_port(); + return &ci; +} + /* * The strategy for the Match blocks is that the config file is parsed twice. * @@ -623,59 +792,82 @@ out: return result; } +/* + * All of the attributes on a single Match line are ANDed together, so we need + * to check every attribute and set the result to zero if any attribute does + * not match. + */ static int -match_cfg_line(char **condition, int line, const char *user, const char *host, - const char *address) +match_cfg_line(char **condition, int line, struct connection_info *ci) { - int result = 1; + int result = 1, attributes = 0, port; char *arg, *attrib, *cp = *condition; - size_t len; - if (user == NULL) + if (ci == NULL) debug3("checking syntax for 'Match %s'", cp); else - debug3("checking match for '%s' user %s host %s addr %s", cp, - user ? user : "(null)", host ? host : "(null)", - address ? address : "(null)"); + debug3("checking match for '%s' user %s host %s addr %s " + "laddr %s lport %d", cp, ci->user ? ci->user : "(null)", + ci->host ? ci->host : "(null)", + ci->address ? ci->address : "(null)", + ci->laddress ? ci->laddress : "(null)", ci->lport); while ((attrib = strdelim(&cp)) && *attrib != '\0') { + attributes++; + if (strcasecmp(attrib, "all") == 0) { + if (attributes != 1 || + ((arg = strdelim(&cp)) != NULL && *arg != '\0')) { + error("'all' cannot be combined with other " + "Match attributes"); + return -1; + } + *condition = cp; + return 1; + } if ((arg = strdelim(&cp)) == NULL || *arg == '\0') { error("Missing Match criteria for %s", attrib); return -1; } - len = strlen(arg); if (strcasecmp(attrib, "user") == 0) { - if (!user) { + if (ci == NULL || ci->user == NULL) { result = 0; continue; } - if (match_pattern_list(user, arg, len, 0) != 1) + if (match_pattern_list(ci->user, arg, 0) != 1) result = 0; else debug("user %.100s matched 'User %.100s' at " - "line %d", user, arg, line); + "line %d", ci->user, arg, line); } else if (strcasecmp(attrib, "group") == 0) { - switch (match_cfg_line_group(arg, line, user)) { + if (ci == NULL || ci->user == NULL) { + result = 0; + continue; + } + switch (match_cfg_line_group(arg, line, ci->user)) { case -1: return -1; case 0: result = 0; } } else if (strcasecmp(attrib, "host") == 0) { - if (!host) { + if (ci == NULL || ci->host == NULL) { result = 0; continue; } - if (match_hostname(host, arg, len) != 1) + if (match_hostname(ci->host, arg) != 1) result = 0; else debug("connection from %.100s matched 'Host " - "%.100s' at line %d", host, arg, line); + "%.100s' at line %d", ci->host, arg, line); } else if (strcasecmp(attrib, "address") == 0) { - switch (addr_match_list(address, arg)) { + if (ci == NULL || ci->address == NULL) { + result = 0; + continue; + } + switch (addr_match_list(ci->address, arg)) { case 1: debug("connection from %.100s matched 'Address " - "%.100s' at line %d", address, arg, line); + "%.100s' at line %d", ci->address, arg, line); break; case 0: case -1: @@ -684,12 +876,51 @@ match_cfg_line(char **condition, int line, const char *user, const char *host, case -2: return -1; } + } else if (strcasecmp(attrib, "localaddress") == 0){ + if (ci == NULL || ci->laddress == NULL) { + result = 0; + continue; + } + switch (addr_match_list(ci->laddress, arg)) { + case 1: + debug("connection from %.100s matched " + "'LocalAddress %.100s' at line %d", + ci->laddress, arg, line); + break; + case 0: + case -1: + result = 0; + break; + case -2: + return -1; + } + } else if (strcasecmp(attrib, "localport") == 0) { + if ((port = a2port(arg)) == -1) { + error("Invalid LocalPort '%s' on Match line", + arg); + return -1; + } + if (ci == NULL || ci->lport == 0) { + result = 0; + continue; + } + /* TODO support port lists */ + if (port == ci->lport) + debug("connection from %.100s matched " + "'LocalPort %d' at line %d", + ci->laddress, port, line); + else + result = 0; } else { error("Unsupported Match attribute %s", attrib); return -1; } } - if (user != NULL) + if (attributes == 0) { + error("One or more attributes required for Match"); + return -1; + } + if (ci != NULL) debug3("match %sfound", result ? "" : "not "); *condition = cp; return result; @@ -710,6 +941,7 @@ static const struct multistate multistate_addressfamily[] = { }; static const struct multistate multistate_permitrootlogin[] = { { "without-password", PERMIT_NO_PASSWD }, + { "prohibit-password", PERMIT_NO_PASSWD }, { "forced-commands-only", PERMIT_FORCED_ONLY }, { "yes", PERMIT_YES }, { "no", PERMIT_NO }, @@ -728,25 +960,34 @@ static const struct multistate multistate_gatewayports[] = { { NULL, -1 } }; static const struct multistate multistate_privsep[] = { - { "sandbox", PRIVSEP_SANDBOX }, - { "yes", PRIVSEP_ON }, + { "yes", PRIVSEP_NOSANDBOX }, + { "sandbox", PRIVSEP_ON }, + { "nosandbox", PRIVSEP_NOSANDBOX }, { "no", PRIVSEP_OFF }, { NULL, -1 } }; +static const struct multistate multistate_tcpfwd[] = { + { "yes", FORWARD_ALLOW }, + { "all", FORWARD_ALLOW }, + { "no", FORWARD_DENY }, + { "remote", FORWARD_REMOTE }, + { "local", FORWARD_LOCAL }, + { NULL, -1 } +}; int process_server_config_line(ServerOptions *options, char *line, - const char *filename, int linenum, int *activep, const char *user, - const char *host, const char *address) + const char *filename, int linenum, int *activep, + struct connection_info *connectinfo) { char *cp, **charptr, *arg, *p; - int cmdline = 0, *intptr, value, value2, n; + int cmdline = 0, *intptr, value, value2, n, port; SyslogFacility *log_facility_ptr; LogLevel *log_level_ptr; ServerOpCodes opcode; - int port; u_int i, flags = 0; size_t len; + long long val64; const struct multistate *multistate_ptr; cp = line; @@ -768,7 +1009,7 @@ process_server_config_line(ServerOptions *options, char *line, if (*activep && opcode != sMatch) debug3("%s:%d setting %s %s", filename, linenum, arg, cp); if (*activep == 0 && !(flags & SSHCFG_MATCH)) { - if (user == NULL) { + if (connectinfo == NULL) { fatal("%s line %d: Directive '%s' is not allowed " "within a Match block", filename, linenum, arg); } else { /* this is a directive we have already processed */ @@ -783,7 +1024,6 @@ process_server_config_line(ServerOptions *options, char *line, case sUsePAM: intptr = &options->use_pam; goto parse_flag; - #ifdef RUNTIME_LIBPAM /* @@ -798,7 +1038,7 @@ process_server_config_line(ServerOptions *options, char *line, } #endif /* RUNTIME_LIBPAM */ - + /* Standard Options */ case sBadOption: return -1; @@ -806,9 +1046,6 @@ process_server_config_line(ServerOptions *options, char *line, /* ignore ports from configfile if cmdline specifies ports */ if (options->ports_from_cmdline) return 0; - if (options->listen_addrs != NULL) - fatal("%s line %d: ports must be specified before " - "ListenAddress.", filename, linenum); if (options->num_ports >= MAX_PORTS) fatal("%s line %d: too many ports.", filename, linenum); @@ -844,7 +1081,7 @@ process_server_config_line(ServerOptions *options, char *line, if ((value = convtime(arg)) == -1) fatal("%s line %d: invalid time value.", filename, linenum); - if (*intptr == -1) + if (*activep && *intptr == -1) *intptr = value; break; @@ -860,7 +1097,7 @@ process_server_config_line(ServerOptions *options, char *line, /* check for bare IPv6 address: no "[]" and 2 or more ":" */ if (strchr(arg, '[') == NULL && (p = strchr(arg, ':')) != NULL && strchr(p+1, ':') != NULL) { - add_listen_addr(options, arg, 0); + queue_listen_addr(options, arg, 0); break; } p = hpdelim(&arg); @@ -873,16 +1110,13 @@ process_server_config_line(ServerOptions *options, char *line, else if ((port = a2port(arg)) <= 0) fatal("%s line %d: bad port number", filename, linenum); - add_listen_addr(options, p, port); + queue_listen_addr(options, p, port); break; case sAddressFamily: intptr = &options->address_family; multistate_ptr = multistate_addressfamily; - if (options->listen_addrs != NULL) - fatal("%s line %d: address family must be specified " - "before ListenAddress.", filename, linenum); parse_multistate: arg = strdelim(&cp); if (!arg || *arg == '\0') @@ -921,6 +1155,17 @@ process_server_config_line(ServerOptions *options, char *line, } break; + case sHostKeyAgent: + charptr = &options->host_key_agent; + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing socket name.", + filename, linenum); + if (*activep && *charptr == NULL) + *charptr = !strcmp(arg, SSH_AUTHSOCKET_ENV_NAME) ? + xstrdup(arg) : derelativise_path(arg); + break; + case sHostCertificate: intptr = &options->num_host_cert_files; if (*intptr >= MAX_HOSTKEYS) @@ -975,6 +1220,24 @@ process_server_config_line(ServerOptions *options, char *line, intptr = &options->hostbased_uses_name_from_packet_only; goto parse_flag; + case sHostbasedAcceptedKeyTypes: + charptr = &options->hostbased_key_types; + parse_keytypes: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: Missing argument.", + filename, linenum); + if (!sshkey_names_valid2(*arg == '+' ? arg + 1 : arg, 1)) + fatal("%s line %d: Bad key types '%s'.", + filename, linenum, arg ? arg : ""); + if (*activep && *charptr == NULL) + *charptr = xstrdup(arg); + break; + + case sHostKeyAlgorithms: + charptr = &options->hostkeyalgorithms; + goto parse_keytypes; + case sRSAAuthentication: intptr = &options->rsa_authentication; goto parse_flag; @@ -983,6 +1246,10 @@ process_server_config_line(ServerOptions *options, char *line, intptr = &options->pubkey_authentication; goto parse_flag; + case sPubkeyAcceptedKeyTypes: + charptr = &options->pubkey_key_types; + goto parse_keytypes; + case sKerberosAuthentication: intptr = &options->kerberos_authentication; goto parse_flag; @@ -1007,12 +1274,12 @@ process_server_config_line(ServerOptions *options, char *line, intptr = &options->gss_cleanup_creds; goto parse_flag; - case sPasswordAuthentication: - intptr = &options->password_authentication; + case sGssStrictAcceptor: + intptr = &options->gss_strict_acceptor; goto parse_flag; - case sZeroKnowledgePasswordAuthentication: - intptr = &options->zero_knowledge_password_authentication; + case sPasswordAuthentication: + intptr = &options->password_authentication; goto parse_flag; case sKbdInteractiveAuthentication: @@ -1047,6 +1314,14 @@ process_server_config_line(ServerOptions *options, char *line, charptr = &options->xauth_location; goto parse_filename; + case sPermitTTY: + intptr = &options->permit_tty; + goto parse_flag; + + case sPermitUserRC: + intptr = &options->permit_user_rc; + goto parse_flag; + case sStrictModes: intptr = &options->strict_modes; goto parse_flag; @@ -1072,8 +1347,39 @@ process_server_config_line(ServerOptions *options, char *line, multistate_ptr = multistate_compression; goto parse_multistate; + case sRekeyLimit: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", filename, + linenum); + if (strcmp(arg, "default") == 0) { + val64 = 0; + } else { + if (scan_scaled(arg, &val64) == -1) + fatal("%.200s line %d: Bad number '%s': %s", + filename, linenum, arg, strerror(errno)); + /* check for too-large or too-small limits */ + if (val64 > UINT_MAX) + fatal("%.200s line %d: RekeyLimit too large", + filename, linenum); + if (val64 != 0 && val64 < 16) + fatal("%.200s line %d: RekeyLimit too small", + filename, linenum); + } + if (*activep && options->rekey_limit == -1) + options->rekey_limit = (u_int32_t)val64; + if (cp != NULL) { /* optional rekey interval present */ + if (strcmp(cp, "none") == 0) { + (void)strdelim(&cp); /* discard */ + break; + } + intptr = &options->rekey_interval; + goto parse_time; + } + break; + case sGatewayPorts: - intptr = &options->gateway_ports; + intptr = &options->fwd_opts.gateway_ports; multistate_ptr = multistate_gatewayports; goto parse_multistate; @@ -1105,7 +1411,13 @@ process_server_config_line(ServerOptions *options, char *line, case sAllowTcpForwarding: intptr = &options->allow_tcp_forwarding; - goto parse_flag; + multistate_ptr = multistate_tcpfwd; + goto parse_multistate; + + case sAllowStreamLocalForwarding: + intptr = &options->allow_streamlocal_forwarding; + multistate_ptr = multistate_tcpfwd; + goto parse_multistate; case sAllowAgentForwarding: intptr = &options->allow_agent_forwarding; @@ -1121,6 +1433,8 @@ process_server_config_line(ServerOptions *options, char *line, if (options->num_allow_users >= MAX_ALLOW_USERS) fatal("%s line %d: too many allow users.", filename, linenum); + if (!*activep) + continue; options->allow_users[options->num_allow_users++] = xstrdup(arg); } @@ -1131,6 +1445,8 @@ process_server_config_line(ServerOptions *options, char *line, if (options->num_deny_users >= MAX_DENY_USERS) fatal("%s line %d: too many deny users.", filename, linenum); + if (!*activep) + continue; options->deny_users[options->num_deny_users++] = xstrdup(arg); } @@ -1141,6 +1457,8 @@ process_server_config_line(ServerOptions *options, char *line, if (options->num_allow_groups >= MAX_ALLOW_GROUPS) fatal("%s line %d: too many allow groups.", filename, linenum); + if (!*activep) + continue; options->allow_groups[options->num_allow_groups++] = xstrdup(arg); } @@ -1151,7 +1469,10 @@ process_server_config_line(ServerOptions *options, char *line, if (options->num_deny_groups >= MAX_DENY_GROUPS) fatal("%s line %d: too many deny groups.", filename, linenum); - options->deny_groups[options->num_deny_groups++] = xstrdup(arg); + if (!*activep) + continue; + options->deny_groups[options->num_deny_groups++] = + xstrdup(arg); } break; @@ -1159,7 +1480,7 @@ process_server_config_line(ServerOptions *options, char *line, arg = strdelim(&cp); if (!arg || *arg == '\0') fatal("%s line %d: Missing argument.", filename, linenum); - if (!ciphers_valid(arg)) + if (!ciphers_valid(*arg == '+' ? arg + 1 : arg)) fatal("%s line %d: Bad SSH2 cipher spec '%s'.", filename, linenum, arg ? arg : ""); if (options->ciphers == NULL) @@ -1170,7 +1491,7 @@ process_server_config_line(ServerOptions *options, char *line, arg = strdelim(&cp); if (!arg || *arg == '\0') fatal("%s line %d: Missing argument.", filename, linenum); - if (!mac_valid(arg)) + if (!mac_valid(*arg == '+' ? arg + 1 : arg)) fatal("%s line %d: Bad SSH2 mac spec '%s'.", filename, linenum, arg ? arg : ""); if (options->macs == NULL) @@ -1182,7 +1503,7 @@ process_server_config_line(ServerOptions *options, char *line, if (!arg || *arg == '\0') fatal("%s line %d: Missing argument.", filename, linenum); - if (!kex_names_valid(arg)) + if (!kex_names_valid(*arg == '+' ? arg + 1 : arg)) fatal("%s line %d: Bad SSH2 KexAlgorithms '%s'.", filename, linenum, arg ? arg : ""); if (options->kex_algorithms == NULL) @@ -1231,7 +1552,7 @@ process_server_config_line(ServerOptions *options, char *line, len = strlen(p) + 1; while ((arg = strdelim(&cp)) != NULL && *arg != '\0') { len += 1 + strlen(arg); - p = xrealloc(p, 1, len); + p = xreallocarray(p, 1, len); strlcat(p, " ", len); strlcat(p, arg, len); } @@ -1325,7 +1646,7 @@ process_server_config_line(ServerOptions *options, char *line, fatal("%s line %d: too many allow env.", filename, linenum); if (!*activep) - break; + continue; options->accept_env[options->num_accept_env++] = xstrdup(arg); } @@ -1346,7 +1667,7 @@ process_server_config_line(ServerOptions *options, char *line, if (value == -1) fatal("%s line %d: Bad yes/point-to-point/ethernet/" "no argument: %s", filename, linenum, arg); - if (*intptr == -1) + if (*activep && *intptr == -1) *intptr = value; break; @@ -1354,7 +1675,7 @@ process_server_config_line(ServerOptions *options, char *line, if (cmdline) fatal("Match directive not supported as a command-line " "option"); - value = match_cfg_line(&cp, linenum, user, host, address); + value = match_cfg_line(&cp, linenum, connectinfo); if (value < 0) fatal("%s line %d: Bad Match condition", filename, linenum); @@ -1374,6 +1695,13 @@ process_server_config_line(ServerOptions *options, char *line, } break; } + if (strcmp(arg, "none") == 0) { + if (*activep && n == -1) { + options->num_permitted_opens = 1; + channel_disable_adm_local_opens(); + } + break; + } if (*activep && n == -1) channel_clear_adm_permitted_opens(); for (; arg != NULL && *arg != '\0'; arg = strdelim(&cp)) { @@ -1382,7 +1710,7 @@ process_server_config_line(ServerOptions *options, char *line, fatal("%s line %d: missing host in PermitOpen", filename, linenum); p = cleanhostname(p); - if (arg == NULL || (port = a2port(arg)) <= 0) + if (arg == NULL || ((port = permitopen_port(arg)) < 0)) fatal("%s line %d: bad port number in " "PermitOpen", filename, linenum); if (*activep && n == -1) @@ -1392,7 +1720,7 @@ process_server_config_line(ServerOptions *options, char *line, break; case sForceCommand: - if (cp == NULL) + if (cp == NULL || *cp == '\0') fatal("%.200s line %d: Missing argument.", filename, linenum); len = strspn(cp, WHITESPACE); @@ -1436,6 +1764,124 @@ process_server_config_line(ServerOptions *options, char *line, } break; + case sVersionAddendum: + if (cp == NULL || *cp == '\0') + fatal("%.200s line %d: Missing argument.", filename, + linenum); + len = strspn(cp, WHITESPACE); + if (*activep && options->version_addendum == NULL) { + if (strcasecmp(cp + len, "none") == 0) + options->version_addendum = xstrdup(""); + else if (strchr(cp + len, '\r') != NULL) + fatal("%.200s line %d: Invalid argument", + filename, linenum); + else + options->version_addendum = xstrdup(cp + len); + } + return 0; + + case sAuthorizedKeysCommand: + if (cp == NULL) + fatal("%.200s line %d: Missing argument.", filename, + linenum); + len = strspn(cp, WHITESPACE); + if (*activep && options->authorized_keys_command == NULL) { + if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0) + fatal("%.200s line %d: AuthorizedKeysCommand " + "must be an absolute path", + filename, linenum); + options->authorized_keys_command = xstrdup(cp + len); + } + return 0; + + case sAuthorizedKeysCommandUser: + charptr = &options->authorized_keys_command_user; + + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing AuthorizedKeysCommandUser " + "argument.", filename, linenum); + if (*activep && *charptr == NULL) + *charptr = xstrdup(arg); + break; + + case sAuthorizedPrincipalsCommand: + if (cp == NULL) + fatal("%.200s line %d: Missing argument.", filename, + linenum); + len = strspn(cp, WHITESPACE); + if (*activep && + options->authorized_principals_command == NULL) { + if (cp[len] != '/' && strcasecmp(cp + len, "none") != 0) + fatal("%.200s line %d: " + "AuthorizedPrincipalsCommand must be " + "an absolute path", filename, linenum); + options->authorized_principals_command = + xstrdup(cp + len); + } + return 0; + + case sAuthorizedPrincipalsCommandUser: + charptr = &options->authorized_principals_command_user; + + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing " + "AuthorizedPrincipalsCommandUser argument.", + filename, linenum); + if (*activep && *charptr == NULL) + *charptr = xstrdup(arg); + break; + + case sAuthenticationMethods: + if (options->num_auth_methods == 0) { + while ((arg = strdelim(&cp)) && *arg != '\0') { + if (options->num_auth_methods >= + MAX_AUTH_METHODS) + fatal("%s line %d: " + "too many authentication methods.", + filename, linenum); + if (auth2_methods_valid(arg, 0) != 0) + fatal("%s line %d: invalid " + "authentication method list.", + filename, linenum); + if (!*activep) + continue; + options->auth_methods[ + options->num_auth_methods++] = xstrdup(arg); + } + } + return 0; + + case sStreamLocalBindMask: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%s line %d: missing StreamLocalBindMask " + "argument.", filename, linenum); + /* Parse mode in octal format */ + value = strtol(arg, &p, 8); + if (arg == p || value < 0 || value > 0777) + fatal("%s line %d: Bad mask.", filename, linenum); + if (*activep) + options->fwd_opts.streamlocal_bind_mask = (mode_t)value; + break; + + case sStreamLocalBindUnlink: + intptr = &options->fwd_opts.streamlocal_bind_unlink; + goto parse_flag; + + case sFingerprintHash: + arg = strdelim(&cp); + if (!arg || *arg == '\0') + fatal("%.200s line %d: Missing argument.", + filename, linenum); + if ((value = ssh_digest_alg_by_name(arg)) == -1) + fatal("%.200s line %d: Invalid hash algorithm \"%s\".", + filename, linenum, arg); + if (*activep) + options->fingerprint_hash = value; + break; + case sDeprecated: logit("%s line %d: Deprecated option %s", filename, linenum, arg); @@ -1465,8 +1911,9 @@ process_server_config_line(ServerOptions *options, char *line, void load_server_config(const char *filename, Buffer *conf) { - char line[1024], *cp; + char line[4096], *cp; FILE *f; + int lineno = 0; debug2("%s: filename %s", __func__, filename); if ((f = fopen(filename, "r")) == NULL) { @@ -1475,6 +1922,9 @@ load_server_config(const char *filename, Buffer *conf) } buffer_clear(conf); while (fgets(line, sizeof(line), f)) { + lineno++; + if (strlen(line) == sizeof(line) - 1) + fatal("%s line %d too long", filename, lineno); /* * Trim out comments and strip whitespace * NB - preserve newlines, they are needed to reproduce @@ -1488,37 +1938,63 @@ load_server_config(const char *filename, Buffer *conf) } buffer_append(conf, "\0", 1); fclose(f); +#ifndef WIN32_FIXME + debug2("%s: done config len = %d", __func__, buffer_len(conf)); +#endif } void -parse_server_match_config(ServerOptions *options, const char *user, - const char *host, const char *address) +parse_server_match_config(ServerOptions *options, + struct connection_info *connectinfo) { ServerOptions mo; initialize_server_options(&mo); - parse_server_config(&mo, "reprocess config", &cfg, user, host, address); + parse_server_config(&mo, "reprocess config", &cfg, connectinfo); copy_set_server_options(options, &mo, 0); } -/* Helper macros */ -#define M_CP_INTOPT(n) do {\ - if (src->n != -1) \ - dst->n = src->n; \ -} while (0) -#define M_CP_STROPT(n) do {\ - if (src->n != NULL) { \ - if (dst->n != NULL) \ - xfree(dst->n); \ - dst->n = src->n; \ - } \ -} while(0) -#define M_CP_STRARRAYOPT(n, num_n) do {\ - if (src->num_n != 0) { \ - for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \ - dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \ - } \ -} while(0) +int parse_server_match_testspec(struct connection_info *ci, char *spec) +{ + char *p; + + while ((p = strsep(&spec, ",")) && *p != '\0') { + if (strncmp(p, "addr=", 5) == 0) { + ci->address = xstrdup(p + 5); + } else if (strncmp(p, "host=", 5) == 0) { + ci->host = xstrdup(p + 5); + } else if (strncmp(p, "user=", 5) == 0) { + ci->user = xstrdup(p + 5); + } else if (strncmp(p, "laddr=", 6) == 0) { + ci->laddress = xstrdup(p + 6); + } else if (strncmp(p, "lport=", 6) == 0) { + ci->lport = a2port(p + 6); + if (ci->lport == -1) { + fprintf(stderr, "Invalid port '%s' in test mode" + " specification %s\n", p+6, p); + return -1; + } + } else { + fprintf(stderr, "Invalid test mode specification %s\n", + p); + return -1; + } + } + return 0; +} + +/* + * returns 1 for a complete spec, 0 for partial spec and -1 for an + * empty spec. + */ +int server_match_spec_complete(struct connection_info *ci) +{ + if (ci->user && ci->host && ci->address) + return 1; /* complete */ + if (!ci->user && !ci->host && !ci->address) + return -1; /* empty */ + return 0; /* partial */ +} /* * Copy any supported values that are set. @@ -1530,6 +2006,11 @@ parse_server_match_config(ServerOptions *options, const char *user, void copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) { +#define M_CP_INTOPT(n) do {\ + if (src->n != -1) \ + dst->n = src->n; \ +} while (0) + M_CP_INTOPT(password_authentication); M_CP_INTOPT(gss_authentication); M_CP_INTOPT(rsa_authentication); @@ -1538,21 +2019,39 @@ copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) M_CP_INTOPT(hostbased_authentication); M_CP_INTOPT(hostbased_uses_name_from_packet_only); M_CP_INTOPT(kbd_interactive_authentication); - M_CP_INTOPT(zero_knowledge_password_authentication); M_CP_INTOPT(permit_root_login); M_CP_INTOPT(permit_empty_passwd); M_CP_INTOPT(allow_tcp_forwarding); + M_CP_INTOPT(allow_streamlocal_forwarding); M_CP_INTOPT(allow_agent_forwarding); M_CP_INTOPT(permit_tun); - M_CP_INTOPT(gateway_ports); + M_CP_INTOPT(fwd_opts.gateway_ports); M_CP_INTOPT(x11_display_offset); M_CP_INTOPT(x11_forwarding); M_CP_INTOPT(x11_use_localhost); + M_CP_INTOPT(permit_tty); + M_CP_INTOPT(permit_user_rc); M_CP_INTOPT(max_sessions); M_CP_INTOPT(max_authtries); M_CP_INTOPT(ip_qos_interactive); M_CP_INTOPT(ip_qos_bulk); + M_CP_INTOPT(rekey_limit); + M_CP_INTOPT(rekey_interval); + + /* M_CP_STROPT and M_CP_STRARRAYOPT should not appear before here */ +#define M_CP_STROPT(n) do {\ + if (src->n != NULL && dst->n != src->n) { \ + free(dst->n); \ + dst->n = src->n; \ + } \ +} while(0) +#define M_CP_STRARRAYOPT(n, num_n) do {\ + if (src->num_n != 0) { \ + for (dst->num_n = 0; dst->num_n < src->num_n; dst->num_n++) \ + dst->n[dst->num_n] = xstrdup(src->n[dst->num_n]); \ + } \ +} while(0) /* See comment in servconf.h */ COPY_MATCH_STRING_OPTS(); @@ -1574,7 +2073,7 @@ copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth) void parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, - const char *user, const char *host, const char *address) + struct connection_info *connectinfo) { int active, linenum, bad_options = 0; char *cp, *obuf, *cbuf; @@ -1582,17 +2081,18 @@ parse_server_config(ServerOptions *options, const char *filename, Buffer *conf, debug2("%s: config %s len %d", __func__, filename, buffer_len(conf)); obuf = cbuf = xstrdup(buffer_ptr(conf)); - active = user ? 0 : 1; + active = connectinfo ? 0 : 1; linenum = 1; while ((cp = strsep(&cbuf, "\n")) != NULL) { if (process_server_config_line(options, cp, filename, - linenum++, &active, user, host, address) != 0) + linenum++, &active, connectinfo) != 0) bad_options++; } - xfree(obuf); + free(obuf); if (bad_options > 0) fatal("%s: terminating, %d bad configuration options", filename, bad_options); + process_queued_listen_addrs(options); } static const char * @@ -1623,6 +2123,12 @@ fmt_intarg(ServerOpCodes code, int val) return fmt_multistate_int(val, multistate_compression); case sUsePrivilegeSeparation: return fmt_multistate_int(val, multistate_privsep); + case sAllowTcpForwarding: + return fmt_multistate_int(val, multistate_tcpfwd); + case sAllowStreamLocalForwarding: + return fmt_multistate_int(val, multistate_tcpfwd); + case sFingerprintHash: + return ssh_digest_alg_name(val); case sProtocol: switch (val) { case SSH_PROTO_1: @@ -1663,6 +2169,12 @@ dump_cfg_int(ServerOpCodes code, int val) printf("%s %d\n", lookup_opcode_name(code), val); } +static void +dump_cfg_oct(ServerOpCodes code, int val) +{ + printf("%s 0%o\n", lookup_opcode_name(code), val); +} + static void dump_cfg_fmtint(ServerOpCodes code, int val) { @@ -1674,7 +2186,8 @@ dump_cfg_string(ServerOpCodes code, const char *val) { if (val == NULL) return; - printf("%s %s\n", lookup_opcode_name(code), val); + printf("%s %s\n", lookup_opcode_name(code), + val == NULL ? "none" : val); } static void @@ -1691,6 +2204,8 @@ dump_cfg_strarray_oneline(ServerOpCodes code, u_int count, char **vals) { u_int i; + if (count <= 0) + return; printf("%s", lookup_opcode_name(code)); for (i = 0; i < count; i++) printf(" %s", vals[i]); @@ -1704,6 +2219,7 @@ dump_config(ServerOptions *o) int ret; struct addrinfo *ai; char addr[NI_MAXHOST], port[NI_MAXSERV], *s = NULL; + char *laddr1 = xstrdup(""), *laddr2 = NULL; /* these are usually at the top of the config */ for (i = 0; i < o->num_ports; i++) @@ -1711,7 +2227,11 @@ dump_config(ServerOptions *o) dump_cfg_fmtint(sProtocol, o->protocol); dump_cfg_fmtint(sAddressFamily, o->address_family); - /* ListenAddress must be after Port */ + /* + * ListenAddress must be after Port. add_one_listen_addr pushes + * addresses onto a stack, so to maintain ordering we need to + * print these in reverse order. + */ for (ai = o->listen_addrs; ai; ai = ai->ai_next) { if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), port, sizeof(port), @@ -1720,16 +2240,22 @@ dump_config(ServerOptions *o) (ret != EAI_SYSTEM) ? gai_strerror(ret) : strerror(errno)); } else { + laddr2 = laddr1; if (ai->ai_family == AF_INET6) - printf("listenaddress [%s]:%s\n", addr, port); + xasprintf(&laddr1, "listenaddress [%s]:%s\n%s", + addr, port, laddr2); else - printf("listenaddress %s:%s\n", addr, port); + xasprintf(&laddr1, "listenaddress %s:%s\n%s", + addr, port, laddr2); + free(laddr2); } } + printf("%s", laddr1); + free(laddr1); /* integer arguments */ #ifdef USE_PAM - dump_cfg_int(sUsePAM, o->use_pam); + dump_cfg_fmtint(sUsePAM, o->use_pam); #endif dump_cfg_int(sServerKeyBits, o->server_key_bits); dump_cfg_int(sLoginGraceTime, o->login_grace_time); @@ -1739,6 +2265,7 @@ dump_config(ServerOptions *o) dump_cfg_int(sMaxSessions, o->max_sessions); dump_cfg_int(sClientAliveInterval, o->client_alive_interval); dump_cfg_int(sClientAliveCountMax, o->client_alive_count_max); + dump_cfg_oct(sStreamLocalBindMask, o->fwd_opts.streamlocal_bind_mask); /* formatted integer arguments */ dump_cfg_fmtint(sPermitRootLogin, o->permit_root_login); @@ -1761,10 +2288,6 @@ dump_config(ServerOptions *o) #ifdef GSSAPI dump_cfg_fmtint(sGssAuthentication, o->gss_authentication); dump_cfg_fmtint(sGssCleanupCreds, o->gss_cleanup_creds); -#endif -#ifdef JPAKE - dump_cfg_fmtint(sZeroKnowledgePasswordAuthentication, - o->zero_knowledge_password_authentication); #endif dump_cfg_fmtint(sPasswordAuthentication, o->password_authentication); dump_cfg_fmtint(sKbdInteractiveAuthentication, @@ -1775,22 +2298,27 @@ dump_config(ServerOptions *o) dump_cfg_fmtint(sPrintLastLog, o->print_lastlog); dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding); dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost); + dump_cfg_fmtint(sPermitTTY, o->permit_tty); + dump_cfg_fmtint(sPermitUserRC, o->permit_user_rc); dump_cfg_fmtint(sStrictModes, o->strict_modes); dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive); dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd); dump_cfg_fmtint(sPermitUserEnvironment, o->permit_user_env); dump_cfg_fmtint(sUseLogin, o->use_login); dump_cfg_fmtint(sCompression, o->compression); - dump_cfg_fmtint(sGatewayPorts, o->gateway_ports); + dump_cfg_fmtint(sGatewayPorts, o->fwd_opts.gateway_ports); dump_cfg_fmtint(sUseDNS, o->use_dns); dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding); + dump_cfg_fmtint(sAllowAgentForwarding, o->allow_agent_forwarding); + dump_cfg_fmtint(sAllowStreamLocalForwarding, o->allow_streamlocal_forwarding); dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep); + dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash); /* string arguments */ dump_cfg_string(sPidFile, o->pid_file); dump_cfg_string(sXAuthLocation, o->xauth_location); - dump_cfg_string(sCiphers, o->ciphers); - dump_cfg_string(sMacs, o->macs); + dump_cfg_string(sCiphers, o->ciphers ? o->ciphers : KEX_SERVER_ENCRYPT); + dump_cfg_string(sMacs, o->macs ? o->macs : KEX_SERVER_MAC); dump_cfg_string(sBanner, o->banner); dump_cfg_string(sForceCommand, o->adm_forced_command); dump_cfg_string(sChrootDirectory, o->chroot_directory); @@ -1798,6 +2326,21 @@ dump_config(ServerOptions *o) dump_cfg_string(sRevokedKeys, o->revoked_keys_file); dump_cfg_string(sAuthorizedPrincipalsFile, o->authorized_principals_file); + dump_cfg_string(sVersionAddendum, *o->version_addendum == '\0' + ? "none" : o->version_addendum); + dump_cfg_string(sAuthorizedKeysCommand, o->authorized_keys_command); + dump_cfg_string(sAuthorizedKeysCommandUser, o->authorized_keys_command_user); + dump_cfg_string(sAuthorizedPrincipalsCommand, o->authorized_principals_command); + dump_cfg_string(sAuthorizedPrincipalsCommandUser, o->authorized_principals_command_user); + dump_cfg_string(sHostKeyAgent, o->host_key_agent); + dump_cfg_string(sKexAlgorithms, + o->kex_algorithms ? o->kex_algorithms : KEX_SERVER_KEX); + dump_cfg_string(sHostbasedAcceptedKeyTypes, o->hostbased_key_types ? + o->hostbased_key_types : KEX_DEFAULT_PK_ALG); + dump_cfg_string(sHostKeyAlgorithms, o->hostkeyalgorithms ? + o->hostkeyalgorithms : KEX_DEFAULT_PK_ALG); + dump_cfg_string(sPubkeyAcceptedKeyTypes, o->pubkey_key_types ? + o->pubkey_key_types : KEX_DEFAULT_PK_ALG); /* string arguments requiring a lookup */ dump_cfg_string(sLogLevel, log_level_name(o->log_level)); @@ -1808,13 +2351,15 @@ dump_config(ServerOptions *o) o->authorized_keys_files); dump_cfg_strarray(sHostKeyFile, o->num_host_key_files, o->host_key_files); - dump_cfg_strarray(sHostKeyFile, o->num_host_cert_files, + dump_cfg_strarray(sHostCertificate, o->num_host_cert_files, o->host_cert_files); dump_cfg_strarray(sAllowUsers, o->num_allow_users, o->allow_users); dump_cfg_strarray(sDenyUsers, o->num_deny_users, o->deny_users); dump_cfg_strarray(sAllowGroups, o->num_allow_groups, o->allow_groups); dump_cfg_strarray(sDenyGroups, o->num_deny_groups, o->deny_groups); dump_cfg_strarray(sAcceptEnv, o->num_accept_env, o->accept_env); + dump_cfg_strarray_oneline(sAuthenticationMethods, + o->num_auth_methods, o->auth_methods); /* other arguments */ for (i = 0; i < o->num_subsystems; i++) @@ -1834,5 +2379,8 @@ dump_config(ServerOptions *o) printf("ipqos %s ", iptos2str(o->ip_qos_interactive)); printf("%s\n", iptos2str(o->ip_qos_bulk)); + printf("rekeylimit %lld %d\n", (long long)o->rekey_limit, + o->rekey_interval); + channel_print_adm_permitted_opens(); } diff --git a/servconf.h b/servconf.h index 72151e0..b306cfc 100644 --- a/servconf.h +++ b/servconf.h @@ -1,4 +1,4 @@ -/* $OpenBSD: servconf.h,v 1.99 2011/06/22 21:57:01 djm Exp $ */ +/* $OpenBSD: servconf.h,v 1.120 2015/07/10 06:21:53 markus Exp $ */ /* * Author: Tatu Ylonen @@ -16,6 +16,10 @@ #ifndef SERVCONF_H #define SERVCONF_H +#ifdef WIN32_FIXME +#include "misc.h" +#endif + #define MAX_PORTS 256 /* Max # ports. */ #define MAX_ALLOW_USERS 256 /* Max # users on allow list. */ @@ -28,6 +32,7 @@ #define MAX_ACCEPT_ENV 256 /* Max # of env vars. */ #define MAX_MATCH_GROUPS 256 /* Max # of groups for Match. */ #define MAX_AUTHKEYS_FILES 256 /* Max # of authorized_keys files. */ +#define MAX_AUTH_METHODS 256 /* Max # of AuthenticationMethods. */ /* permit_root_login */ #define PERMIT_NOT_SET -1 @@ -39,7 +44,13 @@ /* use_privsep */ #define PRIVSEP_OFF 0 #define PRIVSEP_ON 1 -#define PRIVSEP_SANDBOX 2 +#define PRIVSEP_NOSANDBOX 2 + +/* AllowTCPForwarding */ +#define FORWARD_DENY 0 +#define FORWARD_REMOTE (1) +#define FORWARD_LOCAL (1<<1) +#define FORWARD_ALLOW (FORWARD_REMOTE|FORWARD_LOCAL) #define DEFAULT_AUTH_FAIL_MAX 6 /* Default for MaxAuthTries */ #define DEFAULT_SESSIONS_MAX 10 /* Default for MaxSessions */ @@ -51,13 +62,16 @@ typedef struct { u_int num_ports; u_int ports_from_cmdline; int ports[MAX_PORTS]; /* Port number to listen on. */ - char *listen_addr; /* Address on which the server listens. */ + u_int num_queued_listens; + char **queued_listen_addrs; + int *queued_listen_ports; struct addrinfo *listen_addrs; /* Addresses on which the server listens. */ int address_family; /* Address family used by the server. */ char *host_key_files[MAX_HOSTKEYS]; /* Files containing host keys. */ int num_host_key_files; /* Number of files for host keys. */ char *host_cert_files[MAX_HOSTCERTS]; /* Files containing host certs. */ int num_host_cert_files; /* Number of files for host certs. */ + char *host_key_agent; /* ssh-agent socket for host keys. */ char *pid_file; /* Where to put our pid */ int server_key_bits;/* Size of the server key. */ int login_grace_time; /* Disconnect if no auth in this time @@ -74,6 +88,8 @@ typedef struct { * searching at */ int x11_use_localhost; /* If true, use localhost for fake X11 server. */ char *xauth_location; /* Location of xauth program */ + int permit_tty; /* If false, deny pty allocation */ + int permit_user_rc; /* If false, deny ~/.ssh/rc execution */ int strict_modes; /* If true, require string home dir modes. */ int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */ int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */ @@ -82,15 +98,18 @@ typedef struct { char *macs; /* Supported SSH2 macs. */ char *kex_algorithms; /* SSH2 kex methods in order of preference. */ int protocol; /* Supported protocol versions. */ - int gateway_ports; /* If true, allow remote connects to forwarded ports. */ + struct ForwardOptions fwd_opts; /* forwarding options */ SyslogFacility log_facility; /* Facility for system logging. */ LogLevel log_level; /* Level for system logging. */ int rhosts_rsa_authentication; /* If true, permit rhosts RSA * authentication. */ int hostbased_authentication; /* If true, permit ssh2 hostbased auth */ int hostbased_uses_name_from_packet_only; /* experimental */ + char *hostbased_key_types; /* Key types allowed for hostbased */ + char *hostkeyalgorithms; /* SSH2 server key types */ int rsa_authentication; /* If true, permit RSA authentication. */ int pubkey_authentication; /* If true, permit ssh2 pubkey authentication. */ + char *pubkey_key_types; /* Key types allowed for public key */ int kerberos_authentication; /* If true, permit Kerberos * authentication. */ int kerberos_or_local_passwd; /* If true, permit kerberos @@ -104,18 +123,18 @@ typedef struct { * authenticated with Kerberos. */ int gss_authentication; /* If true, permit GSSAPI authentication */ int gss_cleanup_creds; /* If true, destroy cred cache on logout */ + int gss_strict_acceptor; /* If true, restrict the GSSAPI acceptor name */ int password_authentication; /* If true, permit password * authentication. */ int kbd_interactive_authentication; /* If true, permit */ int challenge_response_authentication; - int zero_knowledge_password_authentication; - /* If true, permit jpake auth */ int permit_empty_passwd; /* If false, do not permit empty * passwords. */ int permit_user_env; /* If true, read ~/.ssh/environment */ int use_login; /* If true, login(1) is used */ int compression; /* If true, compression is allowed */ - int allow_tcp_forwarding; + int allow_tcp_forwarding; /* One of FORWARD_* */ + int allow_streamlocal_forwarding; /* One of FORWARD_* */ int allow_agent_forwarding; u_int num_allow_users; char *allow_users[MAX_ALLOW_USERS]; @@ -165,38 +184,78 @@ typedef struct { char *chroot_directory; char *revoked_keys_file; char *trusted_user_ca_keys; + char *authorized_keys_command; + char *authorized_keys_command_user; char *authorized_principals_file; - - #ifdef WIN32_FIXME + char *authorized_principals_command; + char *authorized_principals_command_user; + + int64_t rekey_limit; + int rekey_interval; + + char *version_addendum; /* Appended to SSH banner */ + + u_int num_auth_methods; + char *auth_methods[MAX_AUTH_METHODS]; + + int fingerprint_hash; +#ifdef WIN32_FIXME int i_am_a_fake_fork; - #endif +#endif char *pamLibrary_; -} ServerOptions; +} ServerOptions; + +/* Information about the incoming connection as used by Match */ +struct connection_info { + const char *user; + const char *host; /* possibly resolved hostname */ + const char *address; /* remote address */ + const char *laddress; /* local address */ + int lport; /* local port */ +}; + /* * These are string config options that must be copied between the * Match sub-config and the main config, and must be sent from the * privsep slave to the privsep master. We use a macro to ensure all * the options are copied and the copies are done in the correct order. + * + * NB. an option must appear in servconf.c:copy_set_server_options() or + * COPY_MATCH_STRING_OPTS here but never both. */ #define COPY_MATCH_STRING_OPTS() do { \ M_CP_STROPT(banner); \ M_CP_STROPT(trusted_user_ca_keys); \ M_CP_STROPT(revoked_keys_file); \ + M_CP_STROPT(authorized_keys_command); \ + M_CP_STROPT(authorized_keys_command_user); \ M_CP_STROPT(authorized_principals_file); \ + M_CP_STROPT(authorized_principals_command); \ + M_CP_STROPT(authorized_principals_command_user); \ + M_CP_STROPT(hostbased_key_types); \ + M_CP_STROPT(pubkey_key_types); \ M_CP_STRARRAYOPT(authorized_keys_files, num_authkeys_files); \ + M_CP_STRARRAYOPT(allow_users, num_allow_users); \ + M_CP_STRARRAYOPT(deny_users, num_deny_users); \ + M_CP_STRARRAYOPT(allow_groups, num_allow_groups); \ + M_CP_STRARRAYOPT(deny_groups, num_deny_groups); \ + M_CP_STRARRAYOPT(accept_env, num_accept_env); \ + M_CP_STRARRAYOPT(auth_methods, num_auth_methods); \ } while (0) +struct connection_info *get_connection_info(int, int); void initialize_server_options(ServerOptions *); void fill_default_server_options(ServerOptions *); int process_server_config_line(ServerOptions *, char *, const char *, int, - int *, const char *, const char *, const char *); + int *, struct connection_info *); void load_server_config(const char *, Buffer *); void parse_server_config(ServerOptions *, const char *, Buffer *, - const char *, const char *, const char *); -void parse_server_match_config(ServerOptions *, const char *, const char *, - const char *); + struct connection_info *); +void parse_server_match_config(ServerOptions *, struct connection_info *); +int parse_server_match_testspec(struct connection_info *, char *); +int server_match_spec_complete(struct connection_info *); void copy_set_server_options(ServerOptions *, ServerOptions *, int); void dump_config(ServerOptions *); char *derelativise_path(const char *); diff --git a/serverloop.c b/serverloop.c index 960a329..4063e7c 100644 --- a/serverloop.c +++ b/serverloop.c @@ -1,4 +1,4 @@ -/* $OpenBSD: serverloop.c,v 1.160 2011/05/15 08:09:01 djm Exp $ */ +/* $OpenBSD: serverloop.c,v 1.178 2015/02/20 22:17:21 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -46,8 +46,8 @@ #undef KRB5 #endif +#include /* MIN MAX */ #include -#include #include #include #ifdef HAVE_SYS_TIME_H @@ -70,6 +70,7 @@ #include "packet.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "canohost.h" #include "sshpty.h" @@ -86,9 +87,8 @@ #include "dispatch.h" #include "auth-options.h" #include "serverloop.h" -#include "misc.h" #include "roaming.h" - +#include "ssherr.h" #ifdef WIN32_FIXME #define isatty(a) WSHELPisatty(a) @@ -97,7 +97,6 @@ extern ServerOptions options; /* XXX */ -extern Kex *xxx_kex; extern Authctxt *the_authctxt; extern int use_privsep; @@ -164,7 +163,7 @@ static void notify_parent(void) { if (notify_pipe[1] != -1) - write(notify_pipe[1], "", 1); + (void)write(notify_pipe[1], "", 1); } static void notify_prepare(fd_set *readset) @@ -293,13 +292,22 @@ client_alive_check(void) */ static void wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, - u_int *nallocp, u_int max_time_milliseconds) + u_int *nallocp, u_int64_t max_time_milliseconds) { struct timeval tv, *tvp; int ret; + time_t minwait_secs = 0; int client_alive_scheduled = 0; int program_alive_scheduled = 0; + /* Allocate and update select() masks for channel descriptors. */ + channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, + &minwait_secs, 0); + + if (minwait_secs != 0) + max_time_milliseconds = MIN(max_time_milliseconds, + (u_int)minwait_secs * 1000); + /* * if using client_alive, set the max timeout accordingly, * and indicate that this particular timeout was for client @@ -311,12 +319,10 @@ wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, if (compat20 && max_time_milliseconds == 0 && options.client_alive_interval) { client_alive_scheduled = 1; - max_time_milliseconds = options.client_alive_interval * 1000; + max_time_milliseconds = + (u_int64_t)options.client_alive_interval * 1000; } - /* Allocate and update select() masks for channel descriptors. */ - channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, 0); - if (compat20) { #if 0 /* wrong: bad condition XXX */ @@ -556,7 +562,7 @@ drain_output(void) static void process_buffered_input_packets(void) { - dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL); + dispatch_run(DISPATCH_NONBLOCK, NULL, active_state); } /* @@ -575,13 +581,12 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) int wait_status; /* Status returned by wait(). */ pid_t wait_pid; /* pid returned by wait(). */ int waiting_termination = 0; /* Have displayed waiting close message. */ - u_int max_time_milliseconds; + u_int64_t max_time_milliseconds; u_int previous_stdout_buffer_bytes; u_int stdout_buffer_bytes; int type; debug("Entering interactive session."); - #ifndef WIN32_FIXME /* Initialize the SIGCHLD kludge. */ child_terminated = 0; @@ -708,7 +713,7 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) /* Display list of open channels. */ cp = channel_open_message(); buffer_append(&stderr_buffer, cp, strlen(cp)); - xfree(cp); + free(cp); } } max_fd = MAX(connection_in, connection_out); @@ -722,7 +727,7 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) &nalloc, max_time_milliseconds); if (received_sigterm) { - logit("Exiting on signal %d", received_sigterm); + logit("Exiting on signal %d", (int)received_sigterm); /* Clean up sessions, utmp, etc. */ cleanup_exit(255); } @@ -736,10 +741,8 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) /* Process output to the client and to program stdin. */ process_output(writeset); } - if (readset) - xfree(readset); - if (writeset) - xfree(writeset); + free(readset); + free(writeset); /* Cleanup and termination code. */ @@ -768,8 +771,8 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) fdin = -1; channel_free_all(); - #ifndef WIN32_FIXME + /* We no longer want our SIGCHLD handler to be called. */ mysignal(SIGCHLD, SIG_DFL); @@ -883,14 +886,15 @@ collect_children(void) child_terminated = 0; #endif - } void server_loop2(Authctxt *authctxt) { fd_set *readset = NULL, *writeset = NULL; - int rekeying = 0, max_fd, nalloc = 0; + int rekeying = 0, max_fd; + u_int nalloc = 0; + u_int64_t rekey_timeout_ms = 0; debug("Entering interactive session for SSH2."); @@ -915,15 +919,20 @@ server_loop2(Authctxt *authctxt) for (;;) { process_buffered_input_packets(); - rekeying = (xxx_kex != NULL && !xxx_kex->done); + rekeying = (active_state->kex != NULL && !active_state->kex->done); if (!rekeying && packet_not_very_much_data_to_write()) channel_output_poll(); + if (options.rekey_interval > 0 && compat20 && !rekeying) + rekey_timeout_ms = packet_get_rekey_timeout() * 1000; + else + rekey_timeout_ms = 0; + wait_until_can_do_something(&readset, &writeset, &max_fd, - &nalloc, 0); + &nalloc, rekey_timeout_ms); if (received_sigterm) { - logit("Exiting on signal %d", received_sigterm); + logit("Exiting on signal %d", (int)received_sigterm); /* Clean up sessions, utmp, etc. */ cleanup_exit(255); } @@ -933,8 +942,8 @@ server_loop2(Authctxt *authctxt) channel_after_select(readset, writeset); if (packet_need_rekeying()) { debug("need rekeying"); - xxx_kex->done = 0; - kex_send_kexinit(xxx_kex); + active_state->kex->done = 0; + kex_send_kexinit(active_state); } } process_input(readset); @@ -944,10 +953,9 @@ server_loop2(Authctxt *authctxt) } collect_children(); - if (readset) - xfree(readset); - if (writeset) - xfree(writeset); + free(readset); + free(writeset); + /* * Wait until all output has been sent to the client. @@ -966,7 +974,7 @@ server_loop2(Authctxt *authctxt) session_destroy_all(NULL); } -static void +static int server_input_keep_alive(int type, u_int32_t seq, void *ctxt) { debug("Got %d/%u for keepalive", type, seq); @@ -976,9 +984,10 @@ server_input_keep_alive(int type, u_int32_t seq, void *ctxt) * the bogus CHANNEL_REQUEST we send for keepalives. */ packet_set_alive_timeouts(0); + return 0; } -static void +static int server_input_stdin_data(int type, u_int32_t seq, void *ctxt) { char *data; @@ -987,15 +996,16 @@ server_input_stdin_data(int type, u_int32_t seq, void *ctxt) /* Stdin data from the client. Append it to the buffer. */ /* Ignore any data if the client has closed stdin. */ if (fdin == -1) - return; + return 0; data = packet_get_string(&data_len); packet_check_eom(); buffer_append(&stdin_buffer, data, data_len); - memset(data, 0, data_len); - xfree(data); + explicit_bzero(data, data_len); + free(data); + return 0; } -static void +static int server_input_eof(int type, u_int32_t seq, void *ctxt) { /* @@ -1006,9 +1016,10 @@ server_input_eof(int type, u_int32_t seq, void *ctxt) debug("EOF received for stdin."); packet_check_eom(); stdin_eof = 1; + return 0; } -static void +static int server_input_window_size(int type, u_int32_t seq, void *ctxt) { u_int row = packet_get_int(); @@ -1020,12 +1031,13 @@ server_input_window_size(int type, u_int32_t seq, void *ctxt) packet_check_eom(); if (fdin != -1) pty_change_window_size(fdin, row, col, xpixel, ypixel); + return 0; } static Channel * server_request_direct_tcpip(void) { - Channel *c; + Channel *c = NULL; char *target, *originator; u_short target_port, originator_port; @@ -1038,12 +1050,51 @@ server_request_direct_tcpip(void) debug("server_request_direct_tcpip: originator %s port %d, target %s " "port %d", originator, originator_port, target, target_port); - /* XXX check permission */ - c = channel_connect_to(target, target_port, - "direct-tcpip", "direct-tcpip"); + /* XXX fine grained permissions */ + if ((options.allow_tcp_forwarding & FORWARD_LOCAL) != 0 && + !no_port_forwarding_flag) { + c = channel_connect_to_port(target, target_port, + "direct-tcpip", "direct-tcpip"); + } else { + logit("refused local port forward: " + "originator %s port %d, target %s port %d", + originator, originator_port, target, target_port); + } - xfree(originator); - xfree(target); + free(originator); + free(target); + + return c; +} + +static Channel * +server_request_direct_streamlocal(void) +{ + Channel *c = NULL; + char *target, *originator; + u_short originator_port; + + target = packet_get_string(NULL); + originator = packet_get_string(NULL); + originator_port = packet_get_int(); + packet_check_eom(); + + debug("server_request_direct_streamlocal: originator %s port %d, target %s", + originator, originator_port, target); + + /* XXX fine grained permissions */ + if ((options.allow_streamlocal_forwarding & FORWARD_LOCAL) != 0 && + !no_port_forwarding_flag) { + c = channel_connect_to_path(target, + "direct-streamlocal@openssh.com", "direct-streamlocal"); + } else { + logit("refused streamlocal port forward: " + "originator %s port %d, target %s", + originator, originator_port, target); + } + + free(originator); + free(target); return c; } @@ -1125,7 +1176,7 @@ server_request_session(void) return c; } -static void +static int server_input_channel_open(int type, u_int32_t seq, void *ctxt) { Channel *c = NULL; @@ -1145,6 +1196,8 @@ server_input_channel_open(int type, u_int32_t seq, void *ctxt) c = server_request_session(); } else if (strcmp(ctype, "direct-tcpip") == 0) { c = server_request_direct_tcpip(); + } else if (strcmp(ctype, "direct-streamlocal@openssh.com") == 0) { + c = server_request_direct_streamlocal(); } else if (strcmp(ctype, "tun@openssh.com") == 0) { c = server_request_tun(); } @@ -1172,15 +1225,87 @@ server_input_channel_open(int type, u_int32_t seq, void *ctxt) } packet_send(); } - xfree(ctype); + free(ctype); + return 0; } -static void +static int +server_input_hostkeys_prove(struct sshbuf **respp) +{ + struct ssh *ssh = active_state; /* XXX */ + struct sshbuf *resp = NULL; + struct sshbuf *sigbuf = NULL; + struct sshkey *key = NULL, *key_pub = NULL, *key_prv = NULL; + int r, ndx, success = 0; + const u_char *blob; + u_char *sig = 0; + size_t blen, slen; + + if ((resp = sshbuf_new()) == NULL || (sigbuf = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new", __func__); + + while (ssh_packet_remaining(ssh) > 0) { + sshkey_free(key); + key = NULL; + if ((r = sshpkt_get_string_direct(ssh, &blob, &blen)) != 0 || + (r = sshkey_from_blob(blob, blen, &key)) != 0) { + error("%s: couldn't parse key: %s", + __func__, ssh_err(r)); + goto out; + } + /* + * Better check that this is actually one of our hostkeys + * before attempting to sign anything with it. + */ + if ((ndx = ssh->kex->host_key_index(key, 1, ssh)) == -1) { + error("%s: unknown host %s key", + __func__, sshkey_type(key)); + goto out; + } + /* + * XXX refactor: make kex->sign just use an index rather + * than passing in public and private keys + */ + if ((key_prv = get_hostkey_by_index(ndx)) == NULL && + (key_pub = get_hostkey_public_by_index(ndx, ssh)) == NULL) { + error("%s: can't retrieve hostkey %d", __func__, ndx); + goto out; + } + sshbuf_reset(sigbuf); + free(sig); + sig = NULL; + if ((r = sshbuf_put_cstring(sigbuf, + "hostkeys-prove-00@openssh.com")) != 0 || + (r = sshbuf_put_string(sigbuf, + ssh->kex->session_id, ssh->kex->session_id_len)) != 0 || + (r = sshkey_puts(key, sigbuf)) != 0 || + (r = ssh->kex->sign(key_prv, key_pub, &sig, &slen, + sshbuf_ptr(sigbuf), sshbuf_len(sigbuf), 0)) != 0 || + (r = sshbuf_put_string(resp, sig, slen)) != 0) { + error("%s: couldn't prepare signature: %s", + __func__, ssh_err(r)); + goto out; + } + } + /* Success */ + *respp = resp; + resp = NULL; /* don't free it */ + success = 1; + out: + free(sig); + sshbuf_free(resp); + sshbuf_free(sigbuf); + sshkey_free(key); + return success; +} + +static int server_input_global_request(int type, u_int32_t seq, void *ctxt) { char *rtype; int want_reply; - int success = 0, allocated_listen_port = 0; + int r, success = 0, allocated_listen_port = 0; + struct sshbuf *resp = NULL; rtype = packet_get_string(NULL); want_reply = packet_get_char(); @@ -1189,63 +1314,99 @@ server_input_global_request(int type, u_int32_t seq, void *ctxt) /* -R style forwarding */ if (strcmp(rtype, "tcpip-forward") == 0) { struct passwd *pw; - char *listen_address; - u_short listen_port; + struct Forward fwd; pw = the_authctxt->pw; if (pw == NULL || !the_authctxt->valid) fatal("server_input_global_request: no/invalid user"); - listen_address = packet_get_string(NULL); - listen_port = (u_short)packet_get_int(); + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_host = packet_get_string(NULL); + fwd.listen_port = (u_short)packet_get_int(); debug("server_input_global_request: tcpip-forward listen %s port %d", - listen_address, listen_port); + fwd.listen_host, fwd.listen_port); /* check permissions */ - if (!options.allow_tcp_forwarding || + if ((options.allow_tcp_forwarding & FORWARD_REMOTE) == 0 || no_port_forwarding_flag || - (!want_reply && listen_port == 0) + (!want_reply && fwd.listen_port == 0) #ifndef NO_IPPORT_RESERVED_CONCEPT - || (listen_port != 0 && listen_port < IPPORT_RESERVED && - pw->pw_uid != 0) + || (fwd.listen_port != 0 && fwd.listen_port < IPPORT_RESERVED && + pw->pw_uid != 0) #endif ) { success = 0; packet_send_debug("Server has disabled port forwarding."); } else { /* Start listening on the port */ - success = channel_setup_remote_fwd_listener( - listen_address, listen_port, - &allocated_listen_port, options.gateway_ports); + success = channel_setup_remote_fwd_listener(&fwd, + &allocated_listen_port, &options.fwd_opts); } - xfree(listen_address); + free(fwd.listen_host); + if ((resp = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new", __func__); + if ((r = sshbuf_put_u32(resp, allocated_listen_port)) != 0) + fatal("%s: sshbuf_put_u32: %s", __func__, ssh_err(r)); } else if (strcmp(rtype, "cancel-tcpip-forward") == 0) { - char *cancel_address; - u_short cancel_port; + struct Forward fwd; - cancel_address = packet_get_string(NULL); - cancel_port = (u_short)packet_get_int(); + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_host = packet_get_string(NULL); + fwd.listen_port = (u_short)packet_get_int(); debug("%s: cancel-tcpip-forward addr %s port %d", __func__, - cancel_address, cancel_port); + fwd.listen_host, fwd.listen_port); - success = channel_cancel_rport_listener(cancel_address, - cancel_port); - xfree(cancel_address); + success = channel_cancel_rport_listener(&fwd); + free(fwd.listen_host); + } else if (strcmp(rtype, "streamlocal-forward@openssh.com") == 0) { + struct Forward fwd; + + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_path = packet_get_string(NULL); + debug("server_input_global_request: streamlocal-forward listen path %s", + fwd.listen_path); + + /* check permissions */ + if ((options.allow_streamlocal_forwarding & FORWARD_REMOTE) == 0 + || no_port_forwarding_flag) { + success = 0; + packet_send_debug("Server has disabled port forwarding."); + } else { + /* Start listening on the socket */ + success = channel_setup_remote_fwd_listener( + &fwd, NULL, &options.fwd_opts); + } + free(fwd.listen_path); + } else if (strcmp(rtype, "cancel-streamlocal-forward@openssh.com") == 0) { + struct Forward fwd; + + memset(&fwd, 0, sizeof(fwd)); + fwd.listen_path = packet_get_string(NULL); + debug("%s: cancel-streamlocal-forward path %s", __func__, + fwd.listen_path); + + success = channel_cancel_rport_listener(&fwd); + free(fwd.listen_path); } else if (strcmp(rtype, "no-more-sessions@openssh.com") == 0) { no_more_sessions = 1; success = 1; + } else if (strcmp(rtype, "hostkeys-prove-00@openssh.com") == 0) { + success = server_input_hostkeys_prove(&resp); } if (want_reply) { packet_start(success ? SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); - if (success && allocated_listen_port > 0) - packet_put_int(allocated_listen_port); + if (success && resp != NULL) + ssh_packet_put_raw(active_state, sshbuf_ptr(resp), + sshbuf_len(resp)); packet_send(); packet_write_wait(); } - xfree(rtype); + free(rtype); + sshbuf_free(resp); + return 0; } -static void +static int server_input_channel_req(int type, u_int32_t seq, void *ctxt) { Channel *c; @@ -1268,13 +1429,14 @@ server_input_channel_req(int type, u_int32_t seq, void *ctxt) } else if ((c->type == SSH_CHANNEL_LARVAL || c->type == SSH_CHANNEL_OPEN) && strcmp(c->ctype, "session") == 0) success = session_input_channel_req(c, rtype); - if (reply) { + if (reply && !(c->flags & CHAN_CLOSE_SENT)) { packet_start(success ? SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); packet_put_int(c->remote_id); packet_send(); } - xfree(rtype); + free(rtype); + return 0; } static void diff --git a/session.c b/session.c index d0db990..b334156 100644 --- a/session.c +++ b/session.c @@ -1,4 +1,4 @@ -/* $OpenBSD: session.c,v 1.258 2010/11/25 04:10:09 djm Exp $ */ +/* $OpenBSD: session.c,v 1.278 2015/04/24 01:36:00 deraadt Exp $ */ /* * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland * All rights reserved @@ -34,7 +34,6 @@ */ #include "includes.h" - /* * We support only client side kerberos on Windows. */ @@ -59,6 +58,7 @@ #include #include #include +#include #ifdef HAVE_PATHS_H #include #endif @@ -69,6 +69,7 @@ #include #include #include +#include #include "openbsd-compat/sys-queue.h" #include "xmalloc.h" @@ -90,13 +91,14 @@ #include "hostfile.h" #include "auth.h" #include "auth-options.h" +#include "authfd.h" #include "pathnames.h" #include "log.h" +#include "misc.h" #include "servconf.h" #include "sshlogin.h" #include "serverloop.h" #include "canohost.h" -#include "misc.h" #include "session.h" #include "kex.h" #include "monitor_wrap.h" @@ -244,7 +246,6 @@ auth_input_request_forwarding(struct passwd * pw) #ifndef WIN32_FIXME Channel *nc; int sock = -1; - struct sockaddr_un sunaddr; if (auth_sock_name != NULL) { error("authentication forwarding requested twice."); @@ -262,7 +263,7 @@ auth_input_request_forwarding(struct passwd * pw) packet_send_debug("Agent forwarding disabled: " "mkdtemp() failed: %.100s", strerror(errno)); restore_uid(); - xfree(auth_sock_dir); + free(auth_sock_dir); auth_sock_dir = NULL; goto authsock_err; } @@ -270,33 +271,15 @@ auth_input_request_forwarding(struct passwd * pw) xasprintf(&auth_sock_name, "%s/agent.%ld", auth_sock_dir, (long) getpid()); - /* Create the socket. */ - sock = socket(AF_UNIX, SOCK_STREAM, 0); - if (sock < 0) { - error("socket: %.100s", strerror(errno)); - restore_uid(); - goto authsock_err; - } - - /* Bind it to the name. */ - memset(&sunaddr, 0, sizeof(sunaddr)); - sunaddr.sun_family = AF_UNIX; - strlcpy(sunaddr.sun_path, auth_sock_name, sizeof(sunaddr.sun_path)); - - if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) { - error("bind: %.100s", strerror(errno)); - restore_uid(); - goto authsock_err; - } + /* Start a Unix listener on auth_sock_name. */ + sock = unix_listener(auth_sock_name, SSH_LISTEN_BACKLOG, 0); /* Restore the privileged uid. */ restore_uid(); - /* Start listening on the socket. */ - if (listen(sock, SSH_LISTEN_BACKLOG) < 0) { - error("listen: %.100s", strerror(errno)); + /* Check for socket/bind/listen failure. */ + if (sock < 0) goto authsock_err; - } /* Allocate a channel for the authentication agent socket. */ nc = channel_new("auth socket", @@ -307,11 +290,10 @@ auth_input_request_forwarding(struct passwd * pw) return 1; authsock_err: - if (auth_sock_name != NULL) - xfree(auth_sock_name); + free(auth_sock_name); if (auth_sock_dir != NULL) { rmdir(auth_sock_dir); - xfree(auth_sock_dir); + free(auth_sock_dir); } if (sock != -1) close(sock); @@ -339,7 +321,11 @@ do_authenticated(Authctxt *authctxt) setproctitle("%s", authctxt->pw->pw_name); /* setup the channel layer */ - if (!no_port_forwarding_flag && options.allow_tcp_forwarding) + /* XXX - streamlocal? */ + if (no_port_forwarding_flag || + (options.allow_tcp_forwarding & FORWARD_LOCAL) == 0) + channel_disable_adm_local_opens(); + else channel_permit_all_opens(); auth_debug_send(); @@ -427,8 +413,8 @@ do_authenticated1(Authctxt *authctxt) packet_check_eom(); success = session_setup_x11fwd(s); if (!success) { - xfree(s->auth_proto); - xfree(s->auth_data); + free(s->auth_proto); + free(s->auth_data); s->auth_proto = NULL; s->auth_data = NULL; } @@ -449,13 +435,13 @@ do_authenticated1(Authctxt *authctxt) debug("Port forwarding not permitted for this authentication."); break; } - if (!options.allow_tcp_forwarding) { + if (!(options.allow_tcp_forwarding & FORWARD_REMOTE)) { debug("Port forwarding not permitted."); break; } debug("Received TCP/IP port forwarding request."); if (channel_input_port_forward_request(s->pw->pw_uid == 0, - options.gateway_ports) < 0) { + &options.fwd_opts) < 0) { debug("Port forwarding failed."); break; } @@ -475,7 +461,7 @@ do_authenticated1(Authctxt *authctxt) if (do_exec(s, command) != 0) packet_disconnect( "command execution failed"); - xfree(command); + free(command); } else { if (do_exec(s, NULL) != 0) packet_disconnect( @@ -504,15 +490,19 @@ do_authenticated1(Authctxt *authctxt) } } +// PRAGMA:TODO +#ifndef WIN32_FIXME +#define USE_PIPES 1 +#endif /* * This is called to fork and execute a command when we have no tty. This * will call do_child from the child, and server_loop from the parent after * setting up file descriptors and such. */ - -int do_exec_no_pty(Session *s, const char *command) +int +do_exec_no_pty(Session *s, const char *command) { - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME /* * Win32 code. @@ -767,7 +757,7 @@ int do_exec_no_pty(Session *s, const char *command) snprintf(buf, sizeof buf, "%.50s %d %.50s %d", get_remote_ipaddr(), get_remote_port(), laddr, get_local_port()); - xfree(laddr); + free(laddr); SetEnvironmentVariable("SSH_CONNECTION", buf); @@ -893,7 +883,6 @@ int do_exec_no_pty(Session *s, const char *command) /* * Original OpenSSH code. */ - pid_t pid; #ifdef USE_PIPES @@ -1078,8 +1067,7 @@ int do_exec_no_pty(Session *s, const char *command) } #endif return 0; - - #endif /* else WIN32_FIXME */ +#endif /* else WIN32_FIXME */ } /* @@ -1096,7 +1084,6 @@ do_exec_pty(Session *s, const char *command) /* * Original OpenSSH code. */ - int fdout, ptyfd, ttyfd, ptymaster; pid_t pid; @@ -1216,7 +1203,7 @@ do_exec_pty(Session *s, const char *command) return 0; -#endif +#endif } #ifdef LOGIN_NEEDS_UTMPX @@ -1255,27 +1242,50 @@ int do_exec(Session *s, const char *command) { int ret; + const char *forced = NULL; + char session_type[1024], *tty = NULL; if (options.adm_forced_command) { original_command = command; command = options.adm_forced_command; - if (IS_INTERNAL_SFTP(command)) { - s->is_subsystem = s->is_subsystem ? - SUBSYSTEM_INT_SFTP : SUBSYSTEM_INT_SFTP_ERROR; - } else if (s->is_subsystem) - s->is_subsystem = SUBSYSTEM_EXT; - debug("Forced command (config) '%.900s'", command); + forced = "(config)"; } else if (forced_command) { original_command = command; command = forced_command; + forced = "(key-option)"; + } + if (forced != NULL) { if (IS_INTERNAL_SFTP(command)) { s->is_subsystem = s->is_subsystem ? SUBSYSTEM_INT_SFTP : SUBSYSTEM_INT_SFTP_ERROR; } else if (s->is_subsystem) s->is_subsystem = SUBSYSTEM_EXT; - debug("Forced command (key option) '%.900s'", command); + snprintf(session_type, sizeof(session_type), + "forced-command %s '%.900s'", forced, command); + } else if (s->is_subsystem) { + snprintf(session_type, sizeof(session_type), + "subsystem '%.900s'", s->subsys); + } else if (command == NULL) { + snprintf(session_type, sizeof(session_type), "shell"); + } else { + /* NB. we don't log unforced commands to preserve privacy */ + snprintf(session_type, sizeof(session_type), "command"); } + if (s->ttyfd != -1) { + tty = s->tty; + if (strncmp(tty, "/dev/", 5) == 0) + tty += 5; + } + + verbose("Starting session: %s%s%s for %s from %.200s port %d", + session_type, + tty == NULL ? "" : " on ", + tty == NULL ? "" : tty, + s->pw->pw_name, + get_remote_ipaddr(), + get_remote_port()); + #ifdef SSH_AUDIT_EVENTS if (command != NULL) PRIVSEP(audit_run_command(command)); @@ -1416,6 +1426,11 @@ child_set_env(char ***envp, u_int *envsizep, const char *name, u_int envsize; u_int i, namelen; + if (strchr(name, '=') != NULL) { + error("Invalid environment variable \"%.100s\"", name); + return; + } + /* * If we're passed an uninitialized list, allocate a single null * entry before continuing. @@ -1438,7 +1453,7 @@ child_set_env(char ***envp, u_int *envsizep, const char *name, break; if (env[i]) { /* Reuse the slot. */ - xfree(env[i]); + free(env[i]); } else { /* New variable. Expand if necessary. */ envsize = *envsizep; @@ -1446,7 +1461,7 @@ child_set_env(char ***envp, u_int *envsizep, const char *name, if (envsize >= 1000) fatal("child_set_env: too many env vars"); envsize += 50; - env = (*envp) = xrealloc(env, envsize, sizeof(char *)); + env = (*envp) = xreallocarray(env, envsize, sizeof(char *)); *envsizep = envsize; } /* Need to set the NULL pointer at end of array beyond the new slot. */ @@ -1554,8 +1569,8 @@ read_etc_default_login(char ***env, u_int *envsize, uid_t uid) umask((mode_t)mask); for (i = 0; tmpenv[i] != NULL; i++) - xfree(tmpenv[i]); - xfree(tmpenv); + free(tmpenv[i]); + free(tmpenv); } #endif /* HAVE_ETC_DEFAULT_LOGIN */ @@ -1571,7 +1586,7 @@ copy_environment(char **source, char ***env, u_int *envsize) for(i = 0; source[i] != NULL; i++) { var_name = xstrdup(source[i]); if ((var_val = strstr(var_name, "=")) == NULL) { - xfree(var_name); + free(var_name); continue; } *var_val++ = '\0'; @@ -1579,7 +1594,7 @@ copy_environment(char **source, char ***env, u_int *envsize) debug3("Copy environment: %s=%s", var_name, var_val); child_set_env(env, envsize, var_name, var_val); - xfree(var_name); + free(var_name); } } @@ -1680,8 +1695,8 @@ do_setup_env(Session *s, const char *shell) child_set_env(&env, &envsize, str, str + i + 1); } custom_environment = ce->next; - xfree(ce->s); - xfree(ce); + free(ce->s); + free(ce); } } @@ -1693,7 +1708,7 @@ do_setup_env(Session *s, const char *shell) laddr = get_local_ipaddr(packet_get_connection_in()); snprintf(buf, sizeof buf, "%.50s %d %.50s %d", get_remote_ipaddr(), get_remote_port(), laddr, get_local_port()); - xfree(laddr); + free(laddr); child_set_env(&env, &envsize, "SSH_CONNECTION", buf); if (s->ttyfd != -1) @@ -1792,7 +1807,8 @@ do_rc_files(Session *s, const char *shell) /* ignore _PATH_SSH_USER_RC for subsystems and admin forced commands */ if (!s->is_subsystem && options.adm_forced_command == NULL && - !no_user_rc && stat(_PATH_SSH_USER_RC, &st) >= 0) { + !no_user_rc && options.permit_user_rc && + stat(_PATH_SSH_USER_RC, &st) >= 0) { snprintf(cmd, sizeof cmd, "%s -c '%s %s'", shell, _PATH_BSHELL, _PATH_SSH_USER_RC); if (debug_flag) @@ -1856,7 +1872,7 @@ do_nologin(struct passwd *pw) struct stat sb; #ifdef HAVE_LOGIN_CAP - if (login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid) + if (login_getcapbool(lc, "ignorenologin", 0) || pw->pw_uid == 0) return; nl = login_getcapstr(lc, "nologin", def_nl, def_nl); #else @@ -1866,7 +1882,7 @@ do_nologin(struct passwd *pw) #endif if (stat(nl, &sb) == -1) { if (nl != def_nl) - xfree(nl); + free(nl); return; } @@ -1888,7 +1904,7 @@ static void safely_chroot(const char *path, uid_t uid) { const char *cp; - char component[MAXPATHLEN]; + char component[PATH_MAX]; struct stat st; if (*path != '/') @@ -1941,6 +1957,9 @@ do_setusercontext(struct passwd *pw) { #ifndef WIN32_FIXME char *chroot_path, *tmp; +#ifdef USE_LIBIAF + int doing_chroot = 0; +#endif platform_setusercontext(pw); @@ -1977,6 +1996,12 @@ do_setusercontext(struct passwd *pw) safely_chroot(chroot_path, pw->pw_uid); free(tmp); free(chroot_path); + /* Make sure we don't attempt to chroot again */ + free(options.chroot_directory); + options.chroot_directory = NULL; +#ifdef USE_LIBIAF + doing_chroot = 1; +#endif } #ifdef HAVE_LOGIN_CAP @@ -1984,10 +2009,30 @@ do_setusercontext(struct passwd *pw) perror("unable to set user context (setuser)"); exit(1); } + /* + * FreeBSD's setusercontext() will not apply the user's + * own umask setting unless running with the user's UID. + */ + (void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETUMASK); #else +# ifdef USE_LIBIAF +/* In a chroot environment, the set_id() will always fail; typically + * because of the lack of necessary authentication services and runtime + * such as ./usr/lib/libiaf.so, ./usr/lib/libpam.so.1, and ./etc/passwd + * We skip it in the internal sftp chroot case. + * We'll lose auditing and ACLs but permanently_set_uid will + * take care of the rest. + */ + if ((doing_chroot == 0) && set_id(pw->pw_name) != 0) { + fatal("set_id(%s) Failed", pw->pw_name); + } +# endif /* USE_LIBIAF */ /* Permanently switch to the desired uid. */ permanently_set_uid(pw); #endif + } else if (options.chroot_directory != NULL && + strcasecmp(options.chroot_directory, "none") != 0) { + fatal("server lacks privileges to chroot to ChrootDirectory"); } if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) @@ -2049,6 +2094,13 @@ static void child_close_fds(void) { #ifndef WIN32_FIXME + extern int auth_sock; + + if (auth_sock != -1) { + close(auth_sock); + auth_sock = -1; + } + if (packet_get_connection_in() == packet_get_connection_out()) close(packet_get_connection_in()); else { @@ -2316,7 +2368,7 @@ session_unused(int id) fatal("%s: insane session id %d (max %d nalloc %d)", __func__, id, options.max_sessions, sessions_nalloc); } - bzero(&sessions[id], sizeof(*sessions)); + memset(&sessions[id], 0, sizeof(*sessions)); sessions[id].self = id; sessions[id].used = 0; sessions[id].chanid = -1; @@ -2338,7 +2390,7 @@ session_new(void) return NULL; debug2("%s: allocate (allocated %d max %d)", __func__, sessions_nalloc, options.max_sessions); - tmp = xrealloc(sessions, sessions_nalloc + 1, + tmp = xreallocarray(sessions, sessions_nalloc + 1, sizeof(*sessions)); if (tmp == NULL) { error("%s: cannot allocate %d sessions", @@ -2494,7 +2546,7 @@ session_pty_req(Session *s) u_int len; int n_bytes; - if (no_pty_flag) { + if (no_pty_flag || !options.permit_tty) { debug("Allocating a pty not permitted for this authentication."); return 0; } @@ -2516,7 +2568,7 @@ session_pty_req(Session *s) s->ypixel = packet_get_int(); if (strcmp(s->term, "") == 0) { - xfree(s->term); + free(s->term); s->term = NULL; } @@ -2524,8 +2576,7 @@ session_pty_req(Session *s) debug("Allocating pty."); if (!PRIVSEP(pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)))) { - if (s->term) - xfree(s->term); + free(s->term); s->term = NULL; s->ptyfd = -1; s->ttyfd = -1; @@ -2556,15 +2607,16 @@ session_subsystem_req(Session *s) struct stat st; u_int len; int success = 0; - char *prog, *cmd, *subsys = packet_get_string(&len); + char *prog, *cmd; u_int i; + s->subsys = packet_get_string(&len); packet_check_eom(); - logit("subsystem request for %.100s by user %s", subsys, + debug2("subsystem request for %.100s by user %s", s->subsys, s->pw->pw_name); for (i = 0; i < options.num_subsystems; i++) { - if (strcmp(subsys, options.subsystem_name[i]) == 0) { + if (strcmp(s->subsys, options.subsystem_name[i]) == 0) { prog = options.subsystem_command[i]; cmd = options.subsystem_args[i]; if (strcmp(INTERNAL_SFTP_NAME, prog) == 0) { @@ -2583,10 +2635,9 @@ session_subsystem_req(Session *s) } if (!success) - logit("subsystem request for %.100s failed, subsystem not found", - subsys); + logit("subsystem request for %.100s by user %s failed, " + "subsystem not found", s->subsys, s->pw->pw_name); - xfree(subsys); return success; } @@ -2608,8 +2659,8 @@ session_x11_req(Session *s) success = session_setup_x11fwd(s); if (!success) { - xfree(s->auth_proto); - xfree(s->auth_data); + free(s->auth_proto); + free(s->auth_data); s->auth_proto = NULL; s->auth_data = NULL; } @@ -2631,7 +2682,7 @@ session_exec_req(Session *s) char *command = packet_get_string(&len); packet_check_eom(); success = do_exec(s, command) == 0; - xfree(command); + free(command); return success; } @@ -2642,7 +2693,7 @@ session_break_req(Session *s) packet_get_int(); /* ignored */ packet_check_eom(); - if (s->ttyfd == -1 || tcsendbreak(s->ttyfd, 0) < 0) + if (s->ptymaster == -1 || tcsendbreak(s->ptymaster, 0) < 0) return 0; return 1; } @@ -2653,8 +2704,8 @@ session_env_req(Session *s) char *name, *val; u_int name_len, val_len, i; - name = packet_get_string(&name_len); - val = packet_get_string(&val_len); + name = packet_get_cstring(&name_len); + val = packet_get_cstring(&val_len); packet_check_eom(); /* Don't set too many environment variables */ @@ -2666,7 +2717,7 @@ session_env_req(Session *s) for (i = 0; i < options.num_accept_env; i++) { if (match_pattern(name, options.accept_env[i])) { debug2("Setting env %d: %s=%s", s->num_env, name, val); - s->env = xrealloc(s->env, s->num_env + 1, + s->env = xreallocarray(s->env, s->num_env + 1, sizeof(*s->env)); s->env[s->num_env].name = name; s->env[s->num_env].val = val; @@ -2677,8 +2728,8 @@ session_env_req(Session *s) debug2("Ignoring env request %s: disallowed name", name); fail: - xfree(name); - xfree(val); + free(name); + free(val); return (0); } @@ -2771,8 +2822,7 @@ session_pty_cleanup2(Session *s) error("session_pty_cleanup: no session"); return; } - - #ifndef WIN32_FIXME +#ifndef WIN32_FIXME if (s->ttyfd == -1) return; @@ -2780,8 +2830,7 @@ session_pty_cleanup2(Session *s) #endif #ifdef WIN32_FIXME - - /* + /* * Send exit signal to child 'cmd.exe' process. */ @@ -2895,6 +2944,45 @@ session_close_single_x11(int id, void *arg) { Session *s; u_int i; + #ifdef WIN32_FIXME + + /* + * Send exit signal to child 'cmd.exe' process. + */ + + if (s -> pid != NULL) + { + debug("Sending exit signal to child process [pid = %u]...", s -> pid); + + if (!GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, s -> processId)) + { + debug("ERROR. Cannot send signal to process."); + } + + /* + * Try wait 100 ms until child finished. + */ + + if (WaitForSingleObject(s -> pid, 100) == WAIT_TIMEOUT) + { + /* + * If still not closed, kill 'cmd.exe' process. + */ + + if (TerminateProcess(s -> pid, 1) == TRUE) + { + debug("Process %u terminated.", s -> pid); + } + else + { + debug("ERROR. Cannot terminate %u process.", s -> pid); + } + } + + CloseHandle(s -> pid); + } + + #endif debug3("session_close_single_x11: channel %d", id); channel_cancel_cleanup(id); @@ -2910,24 +2998,16 @@ session_close_single_x11(int id, void *arg) if (s->x11_chanids[i] != id) session_close_x11(s->x11_chanids[i]); } - xfree(s->x11_chanids); + free(s->x11_chanids); s->x11_chanids = NULL; - if (s->display) { - xfree(s->display); - s->display = NULL; - } - if (s->auth_proto) { - xfree(s->auth_proto); - s->auth_proto = NULL; - } - if (s->auth_data) { - xfree(s->auth_data); - s->auth_data = NULL; - } - if (s->auth_display) { - xfree(s->auth_display); - s->auth_display = NULL; - } + free(s->display); + s->display = NULL; + free(s->auth_proto); + s->auth_proto = NULL; + free(s->auth_data); + s->auth_data = NULL; + free(s->auth_display); + s->auth_display = NULL; } static void @@ -2986,67 +3066,22 @@ session_close(Session *s) { u_int i; - #ifdef WIN32_FIXME - - /* - * Send exit signal to child 'cmd.exe' process. - */ - - if (s -> pid != NULL) - { - debug("Sending exit signal to child process [pid = %u]...", s -> pid); - - if (!GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, s -> processId)) - { - debug("ERROR. Cannot send signal to process."); - } - - /* - * Try wait 100 ms until child finished. - */ - - if (WaitForSingleObject(s -> pid, 100) == WAIT_TIMEOUT) - { - /* - * If still not closed, kill 'cmd.exe' process. - */ - - if (TerminateProcess(s -> pid, 1) == TRUE) - { - debug("Process %u terminated.", s -> pid); - } - else - { - debug("ERROR. Cannot terminate %u process.", s -> pid); - } - } - - CloseHandle(s -> pid); - } - - #endif - debug("session_close: session %d pid %ld", s->self, (long)s->pid); if (s->ttyfd != -1) session_pty_cleanup(s); - if (s->term) - xfree(s->term); - if (s->display) - xfree(s->display); - if (s->x11_chanids) - xfree(s->x11_chanids); - if (s->auth_display) - xfree(s->auth_display); - if (s->auth_data) - xfree(s->auth_data); - if (s->auth_proto) - xfree(s->auth_proto); + free(s->term); + free(s->display); + free(s->x11_chanids); + free(s->auth_display); + free(s->auth_data); + free(s->auth_proto); + free(s->subsys); if (s->env != NULL) { for (i = 0; i < s->num_env; i++) { - xfree(s->env[i].name); - xfree(s->env[i].val); + free(s->env[i].name); + free(s->env[i].val); } - xfree(s->env); + free(s->env); } session_proctitle(s); session_unused(s->self); @@ -3166,7 +3201,7 @@ session_setup_x11fwd(Session *s) { struct stat st; char display[512], auth_display[512]; - char hostname[MAXHOSTNAMELEN]; + char hostname[NI_MAXHOST]; u_int i; if (no_x11_forwarding_flag) { @@ -3177,7 +3212,7 @@ session_setup_x11fwd(Session *s) debug("X11 forwarding disabled in server configuration file."); return 0; } - if (!options.xauth_location || + if (options.xauth_location == NULL || (stat(options.xauth_location, &st) == -1)) { packet_send_debug("No xauth program; cannot forward with spoofing."); return 0; @@ -3215,12 +3250,12 @@ session_setup_x11fwd(Session *s) s->display_number, s->screen); snprintf(auth_display, sizeof auth_display, "unix:%u.%u", s->display_number, s->screen); + s->display = xstrdup(display); #ifdef WIN32_FIXME s->display = xstrdup(display); #else s->auth_display = xstrdup(auth_display); #endif - s->auth_display = xstrdup(auth_display); } else { #ifdef IPADDR_IN_DISPLAY struct hostent *he; @@ -3258,7 +3293,6 @@ do_cleanup(Authctxt *authctxt) static int called = 0; debug("do_cleanup"); - #ifdef WIN32_FIXME if (authctxt) @@ -3268,6 +3302,7 @@ do_cleanup(Authctxt *authctxt) #endif + /* no cleanup if we're in the child for login shell */ if (is_child) return; @@ -3276,7 +3311,7 @@ do_cleanup(Authctxt *authctxt) if (called) return; called = 1; - + if (authctxt == NULL) return; diff --git a/session.h b/session.h index 944e6cb..f63cdd6 100644 --- a/session.h +++ b/session.h @@ -1,4 +1,4 @@ -/* $OpenBSD: session.h,v 1.30 2008/05/08 12:21:16 djm Exp $ */ +/* $OpenBSD: session.h,v 1.31 2013/10/14 21:20:52 djm Exp $ */ /* * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. @@ -35,7 +35,7 @@ struct Session { struct passwd *pw; Authctxt *authctxt; pid_t pid; - + #ifdef WIN32_FIXME DWORD processId; #endif @@ -59,6 +59,7 @@ struct Session { int chanid; int *x11_chanids; int is_subsystem; + char *subsys; u_int num_env; struct { char *name; diff --git a/sftp-client.c b/sftp-client.c index d4deee6..09b1271 100644 --- a/sftp-client.c +++ b/sftp-client.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-client.c,v 1.94 2010/12/04 00:18:01 djm Exp $ */ +/* $OpenBSD: sftp-client.c,v 1.120 2015/05/28 04:50:53 djm Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller * @@ -22,8 +22,8 @@ #include "includes.h" +#include /* MIN MAX */ #include -#include #ifdef HAVE_SYS_STATVFS_H #include #endif @@ -42,11 +42,13 @@ #include #include #include +#include #include #include #include "xmalloc.h" -#include "buffer.h" +#include "ssherr.h" +#include "sshbuf.h" #include "log.h" #include "atomicio.h" #include "progressmeter.h" @@ -154,6 +156,7 @@ #endif + extern volatile sig_atomic_t interrupted; extern int showprogress; @@ -174,13 +177,14 @@ struct sftp_conn { #define SFTP_EXT_STATVFS 0x00000002 #define SFTP_EXT_FSTATVFS 0x00000004 #define SFTP_EXT_HARDLINK 0x00000008 +#define SFTP_EXT_FSYNC 0x00000010 u_int exts; u_int64_t limit_kbps; struct bwlimit bwlimit_in, bwlimit_out; }; -static char * -get_handle(struct sftp_conn *conn, u_int expected_id, u_int *len, +static u_char * +get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len, const char *errfmt, ...) __attribute__((format(printf, 4, 5))); /* ARGSUSED */ @@ -194,36 +198,39 @@ sftpio(void *_bwlimit, size_t amount) } static void -send_msg(struct sftp_conn *conn, Buffer *m) +send_msg(struct sftp_conn *conn, struct sshbuf *m) { u_char mlen[4]; struct iovec iov[2]; - if (buffer_len(m) > SFTP_MAX_MSG_LENGTH) - fatal("Outbound message too long %u", buffer_len(m)); + if (sshbuf_len(m) > SFTP_MAX_MSG_LENGTH) + fatal("Outbound message too long %zu", sshbuf_len(m)); /* Send length first */ - put_u32(mlen, buffer_len(m)); + put_u32(mlen, sshbuf_len(m)); iov[0].iov_base = mlen; iov[0].iov_len = sizeof(mlen); - iov[1].iov_base = buffer_ptr(m); - iov[1].iov_len = buffer_len(m); + iov[1].iov_base = (u_char *)sshbuf_ptr(m); + iov[1].iov_len = sshbuf_len(m); if (atomiciov6(writev, conn->fd_out, iov, 2, - conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_out) != - buffer_len(m) + sizeof(mlen)) + conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_out) != + sshbuf_len(m) + sizeof(mlen)) fatal("Couldn't send packet: %s", strerror(errno)); - buffer_clear(m); + sshbuf_reset(m); } static void -get_msg(struct sftp_conn *conn, Buffer *m) +get_msg(struct sftp_conn *conn, struct sshbuf *m) { u_int msg_len; + u_char *p; + int r; - buffer_append_space(m, 4); - if (atomicio6(read, conn->fd_in, buffer_ptr(m), 4, + if ((r = sshbuf_reserve(m, 4, &p)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (atomicio6(read, conn->fd_in, p, 4, conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in) != 4) { if (errno == EPIPE) fatal("Connection closed"); @@ -231,12 +238,14 @@ get_msg(struct sftp_conn *conn, Buffer *m) fatal("Couldn't read packet: %s", strerror(errno)); } - msg_len = buffer_get_int(m); + if ((r = sshbuf_get_u32(m, &msg_len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (msg_len > SFTP_MAX_MSG_LENGTH) fatal("Received message too long %u", msg_len); - buffer_append_space(m, msg_len); - if (atomicio6(read, conn->fd_in, buffer_ptr(m), msg_len, + if ((r = sshbuf_reserve(m, msg_len, &p)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (atomicio6(read, conn->fd_in, p, msg_len, conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in) != msg_len) { if (errno == EPIPE) @@ -247,46 +256,56 @@ get_msg(struct sftp_conn *conn, Buffer *m) } static void -send_string_request(struct sftp_conn *conn, u_int id, u_int code, char *s, +send_string_request(struct sftp_conn *conn, u_int id, u_int code, const char *s, u_int len) { - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_put_char(&msg, code); - buffer_put_int(&msg, id); - buffer_put_string(&msg, s, len); - send_msg(conn, &msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, code)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, s, len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id); - buffer_free(&msg); + sshbuf_free(msg); } static void send_string_attrs_request(struct sftp_conn *conn, u_int id, u_int code, - char *s, u_int len, Attrib *a) + const void *s, u_int len, Attrib *a) { - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_put_char(&msg, code); - buffer_put_int(&msg, id); - buffer_put_string(&msg, s, len); - encode_attrib(&msg, a); - send_msg(conn, &msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, code)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, s, len)) != 0 || + (r = encode_attrib(msg, a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id); - buffer_free(&msg); + sshbuf_free(msg); } static u_int get_status(struct sftp_conn *conn, u_int expected_id) { - Buffer msg; - u_int type, id, status; + struct sshbuf *msg; + u_char type; + u_int id, status; + int r; - buffer_init(&msg); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (id != expected_id) fatal("ID mismatch (%u != %u)", id, expected_id); @@ -294,135 +313,160 @@ get_status(struct sftp_conn *conn, u_int expected_id) fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", SSH2_FXP_STATUS, type); - status = buffer_get_int(&msg); - buffer_free(&msg); + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_free(msg); debug3("SSH2_FXP_STATUS %u", status); return status; } -static char * -get_handle(struct sftp_conn *conn, u_int expected_id, u_int *len, +static u_char * +get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len, const char *errfmt, ...) { - Buffer msg; - u_int type, id; - char *handle, errmsg[256]; + struct sshbuf *msg; + u_int id, status; + u_char type; + u_char *handle; + char errmsg[256]; va_list args; - int status; + int r; va_start(args, errfmt); if (errfmt != NULL) vsnprintf(errmsg, sizeof(errmsg), errfmt, args); va_end(args); - buffer_init(&msg); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (id != expected_id) fatal("%s: ID mismatch (%u != %u)", errfmt == NULL ? __func__ : errmsg, id, expected_id); if (type == SSH2_FXP_STATUS) { - status = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (errfmt != NULL) error("%s: %s", errmsg, fx2txt(status)); - buffer_free(&msg); + sshbuf_free(msg); return(NULL); } else if (type != SSH2_FXP_HANDLE) fatal("%s: Expected SSH2_FXP_HANDLE(%u) packet, got %u", errfmt == NULL ? __func__ : errmsg, SSH2_FXP_HANDLE, type); - handle = buffer_get_string(&msg, len); - buffer_free(&msg); + if ((r = sshbuf_get_string(msg, &handle, len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_free(msg); - return(handle); + return handle; } static Attrib * get_decode_stat(struct sftp_conn *conn, u_int expected_id, int quiet) { - Buffer msg; - u_int type, id; - Attrib *a; + struct sshbuf *msg; + u_int id; + u_char type; + int r; + static Attrib a; - buffer_init(&msg); - get_msg(conn, &msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + get_msg(conn, msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug3("Received stat reply T:%u I:%u", type, id); if (id != expected_id) fatal("ID mismatch (%u != %u)", id, expected_id); if (type == SSH2_FXP_STATUS) { - int status = buffer_get_int(&msg); + u_int status; + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (quiet) debug("Couldn't stat remote file: %s", fx2txt(status)); else error("Couldn't stat remote file: %s", fx2txt(status)); - buffer_free(&msg); + sshbuf_free(msg); return(NULL); } else if (type != SSH2_FXP_ATTRS) { fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", SSH2_FXP_ATTRS, type); } - a = decode_attrib(&msg); - buffer_free(&msg); + if ((r = decode_attrib(msg, &a)) != 0) { + error("%s: couldn't decode attrib: %s", __func__, ssh_err(r)); + sshbuf_free(msg); + return NULL; + } + sshbuf_free(msg); - return(a); + return &a; } static int get_decode_statvfs(struct sftp_conn *conn, struct sftp_statvfs *st, u_int expected_id, int quiet) { - Buffer msg; - u_int type, id, flag; + struct sshbuf *msg; + u_char type; + u_int id; + u_int64_t flag; + int r; - buffer_init(&msg); - get_msg(conn, &msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + get_msg(conn, msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug3("Received statvfs reply T:%u I:%u", type, id); if (id != expected_id) fatal("ID mismatch (%u != %u)", id, expected_id); if (type == SSH2_FXP_STATUS) { - int status = buffer_get_int(&msg); + u_int status; + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (quiet) debug("Couldn't statvfs: %s", fx2txt(status)); else error("Couldn't statvfs: %s", fx2txt(status)); - buffer_free(&msg); + sshbuf_free(msg); return -1; } else if (type != SSH2_FXP_EXTENDED_REPLY) { fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u", SSH2_FXP_EXTENDED_REPLY, type); } - bzero(st, sizeof(*st)); - st->f_bsize = buffer_get_int64(&msg); - st->f_frsize = buffer_get_int64(&msg); - st->f_blocks = buffer_get_int64(&msg); - st->f_bfree = buffer_get_int64(&msg); - st->f_bavail = buffer_get_int64(&msg); - st->f_files = buffer_get_int64(&msg); - st->f_ffree = buffer_get_int64(&msg); - st->f_favail = buffer_get_int64(&msg); - st->f_fsid = buffer_get_int64(&msg); - flag = buffer_get_int64(&msg); - st->f_namemax = buffer_get_int64(&msg); + memset(st, 0, sizeof(*st)); + if ((r = sshbuf_get_u64(msg, &st->f_bsize)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_frsize)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_blocks)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_bfree)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_bavail)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_files)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_ffree)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_favail)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_fsid)) != 0 || + (r = sshbuf_get_u64(msg, &flag)) != 0 || + (r = sshbuf_get_u64(msg, &st->f_namemax)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); st->f_flag = (flag & SSH2_FXE_STATVFS_ST_RDONLY) ? ST_RDONLY : 0; st->f_flag |= (flag & SSH2_FXE_STATVFS_ST_NOSUID) ? ST_NOSUID : 0; - buffer_free(&msg); + sshbuf_free(msg); return 0; } @@ -431,11 +475,13 @@ struct sftp_conn * do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, u_int64_t limit_kbps) { - u_int type; - Buffer msg; + u_char type; + struct sshbuf *msg; struct sftp_conn *ret; + int r; - ret = xmalloc(sizeof(*ret)); + ret = xcalloc(1, sizeof(*ret)); + ret->msg_id = 1; ret->fd_in = fd_in; ret->fd_out = fd_out; ret->transfer_buflen = transfer_buflen; @@ -443,51 +489,62 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, ret->exts = 0; ret->limit_kbps = 0; - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_INIT); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_INIT)) != 0 || + (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(ret, msg); - buffer_put_int(&msg, SSH2_FILEXFER_VERSION); + sshbuf_reset(msg); - send_msg(ret, &msg); - - buffer_clear(&msg); - - get_msg(ret, &msg); + get_msg(ret, msg); /* Expecting a VERSION reply */ - if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { + if ((r = sshbuf_get_u8(msg, &type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (type != SSH2_FXP_VERSION) { error("Invalid packet back from SSH2_FXP_INIT (type %u)", type); - buffer_free(&msg); + sshbuf_free(msg); + free(ret); return(NULL); } - ret->version = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &ret->version)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug2("Remote version: %u", ret->version); /* Check for extensions */ - while (buffer_len(&msg) > 0) { - - char *name = buffer_get_string(&msg, NULL); - char *value = buffer_get_string(&msg, NULL); + while (sshbuf_len(msg) > 0) { + char *name; + u_char *value; + size_t vlen; int known = 0; + if ((r = sshbuf_get_cstring(msg, &name, NULL)) != 0 || + (r = sshbuf_get_string(msg, &value, &vlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (strcmp(name, "posix-rename@openssh.com") == 0 && - strcmp(value, "1") == 0) { + strcmp((char *)value, "1") == 0) { ret->exts |= SFTP_EXT_POSIX_RENAME; known = 1; } else if (strcmp(name, "statvfs@openssh.com") == 0 && - strcmp(value, "2") == 0) { + strcmp((char *)value, "2") == 0) { ret->exts |= SFTP_EXT_STATVFS; known = 1; } else if (strcmp(name, "fstatvfs@openssh.com") == 0 && - strcmp(value, "2") == 0) { + strcmp((char *)value, "2") == 0) { ret->exts |= SFTP_EXT_FSTATVFS; known = 1; } else if (strcmp(name, "hardlink@openssh.com") == 0 && - strcmp(value, "1") == 0) { + strcmp((char *)value, "1") == 0) { ret->exts |= SFTP_EXT_HARDLINK; known = 1; + } else if (strcmp(name, "fsync@openssh.com") == 0 && + strcmp((char *)value, "1") == 0) { + ret->exts |= SFTP_EXT_FSYNC; + known = 1; } if (known) { debug2("Server supports extension \"%s\" revision %s", @@ -495,11 +552,11 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, } else { debug2("Unrecognised server extension \"%s\"", name); } - xfree(name); - xfree(value); + free(name); + free(value); } - buffer_free(&msg); + sshbuf_free(msg); /* Some filexfer v.0 servers don't support large packets */ if (ret->version == 0) @@ -512,7 +569,7 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, bandwidth_limit_init(&ret->bwlimit_out, ret->limit_kbps, ret->transfer_buflen); } - + return ret; } @@ -523,56 +580,68 @@ sftp_proto_version(struct sftp_conn *conn) } int -do_close(struct sftp_conn *conn, char *handle, u_int handle_len) +do_close(struct sftp_conn *conn, const u_char *handle, u_int handle_len) { u_int id, status; - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); id = conn->msg_id++; - buffer_put_char(&msg, SSH2_FXP_CLOSE); - buffer_put_int(&msg, id); - buffer_put_string(&msg, handle, handle_len); - send_msg(conn, &msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_CLOSE)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, handle, handle_len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message SSH2_FXP_CLOSE I:%u", id); status = get_status(conn, id); if (status != SSH2_FX_OK) error("Couldn't close file: %s", fx2txt(status)); - buffer_free(&msg); + sshbuf_free(msg); - return status; + return status == SSH2_FX_OK ? 0 : -1; } static int -do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, +do_lsreaddir(struct sftp_conn *conn, const char *path, int print_flag, SFTP_DIRENT ***dir) { - Buffer msg; - u_int count, type, id, handle_len, i, expected_id, ents = 0; + struct sshbuf *msg; + u_int count, id, i, expected_id, ents = 0; + size_t handle_len; + u_char type; char *handle; + int status = SSH2_FX_FAILURE; + int r; + + if (dir) + *dir = NULL; id = conn->msg_id++; - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_OPENDIR); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, path); - send_msg(conn, &msg); - - buffer_clear(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPENDIR)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, path)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); handle = get_handle(conn, id, &handle_len, "remote readdir(\"%s\")", path); - if (handle == NULL) + if (handle == NULL) { + sshbuf_free(msg); return -1; + } if (dir) { ents = 0; - *dir = xmalloc(sizeof(**dir)); + *dir = xcalloc(1, sizeof(**dir)); (*dir)[0] = NULL; } @@ -581,18 +650,20 @@ do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, debug3("Sending SSH2_FXP_READDIR I:%u", id); - buffer_clear(&msg); - buffer_put_char(&msg, SSH2_FXP_READDIR); - buffer_put_int(&msg, id); - buffer_put_string(&msg, handle, handle_len); - send_msg(conn, &msg); + sshbuf_reset(msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_READDIR)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, handle, handle_len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); - buffer_clear(&msg); + sshbuf_reset(msg); - get_msg(conn, &msg); + get_msg(conn, msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug3("Received reply T:%u I:%u", type, id); @@ -600,36 +671,45 @@ do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, fatal("ID mismatch (%u != %u)", id, expected_id); if (type == SSH2_FXP_STATUS) { - int status = buffer_get_int(&msg); + u_int rstatus; - debug3("Received SSH2_FXP_STATUS %d", status); - - if (status == SSH2_FX_EOF) { + if ((r = sshbuf_get_u32(msg, &rstatus)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + debug3("Received SSH2_FXP_STATUS %d", rstatus); + if (rstatus == SSH2_FX_EOF) break; - } else { - error("Couldn't read directory: %s", - fx2txt(status)); - do_close(conn, handle, handle_len); - xfree(handle); - return(status); - } + error("Couldn't read directory: %s", fx2txt(rstatus)); + goto out; } else if (type != SSH2_FXP_NAME) fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", SSH2_FXP_NAME, type); - count = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &count)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (count == 0) break; debug3("Received %d SSH2_FXP_NAME responses", count); for (i = 0; i < count; i++) { char *filename, *longname; - Attrib *a; + Attrib a; - filename = buffer_get_string(&msg, NULL); - longname = buffer_get_string(&msg, NULL); - a = decode_attrib(&msg); + if ((r = sshbuf_get_cstring(msg, &filename, + NULL)) != 0 || + (r = sshbuf_get_cstring(msg, &longname, + NULL)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + if ((r = decode_attrib(msg, &a)) != 0) { + error("%s: couldn't decode attrib: %s", + __func__, ssh_err(r)); + free(filename); + free(longname); + sshbuf_free(msg); + return -1; + } - if (printflag) + if (print_flag) printf("%s\n", longname); /* @@ -640,39 +720,41 @@ do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, if (strchr(filename, '/') != NULL) { error("Server sent suspect path \"%s\" " "during readdir of \"%s\"", filename, path); - goto next; - } - - if (dir) { - *dir = xrealloc(*dir, ents + 2, sizeof(**dir)); - (*dir)[ents] = xmalloc(sizeof(***dir)); + } else if (dir) { + *dir = xreallocarray(*dir, ents + 2, sizeof(**dir)); + (*dir)[ents] = xcalloc(1, sizeof(***dir)); (*dir)[ents]->filename = xstrdup(filename); (*dir)[ents]->longname = xstrdup(longname); - memcpy(&(*dir)[ents]->a, a, sizeof(*a)); + memcpy(&(*dir)[ents]->a, &a, sizeof(a)); (*dir)[++ents] = NULL; } - next: - xfree(filename); - xfree(longname); + free(filename); + free(longname); } } + status = 0; - buffer_free(&msg); + out: + sshbuf_free(msg); do_close(conn, handle, handle_len); - xfree(handle); + free(handle); - /* Don't return partial matches on interrupt */ - if (interrupted && dir != NULL && *dir != NULL) { + if (status != 0 && dir != NULL) { + /* Don't return results on error */ free_sftp_dirents(*dir); - *dir = xmalloc(sizeof(**dir)); + *dir = NULL; + } else if (interrupted && dir != NULL && *dir != NULL) { + /* Don't return partial matches on interrupt */ + free_sftp_dirents(*dir); + *dir = xcalloc(1, sizeof(**dir)); **dir = NULL; } - return 0; + return status; } int -do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) +do_readdir(struct sftp_conn *conn, const char *path, SFTP_DIRENT ***dir) { return(do_lsreaddir(conn, path, 0, dir)); } @@ -681,16 +763,18 @@ void free_sftp_dirents(SFTP_DIRENT **s) { int i; + if (s == NULL) + return; for (i = 0; s[i]; i++) { - xfree(s[i]->filename); - xfree(s[i]->longname); - xfree(s[i]); + free(s[i]->filename); + free(s[i]->longname); + free(s[i]); } - xfree(s); + free(s); } int -do_rm(struct sftp_conn *conn, char *path) +do_rm(struct sftp_conn *conn, const char *path) { u_int status, id; @@ -701,11 +785,11 @@ do_rm(struct sftp_conn *conn, char *path) status = get_status(conn, id); if (status != SSH2_FX_OK) error("Couldn't delete file: %s", fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } int -do_mkdir(struct sftp_conn *conn, char *path, Attrib *a, int printflag) +do_mkdir(struct sftp_conn *conn, const char *path, Attrib *a, int print_flag) { u_int status, id; @@ -714,14 +798,14 @@ do_mkdir(struct sftp_conn *conn, char *path, Attrib *a, int printflag) strlen(path), a); status = get_status(conn, id); - if (status != SSH2_FX_OK && printflag) + if (status != SSH2_FX_OK && print_flag) error("Couldn't create directory: %s", fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } int -do_rmdir(struct sftp_conn *conn, char *path) +do_rmdir(struct sftp_conn *conn, const char *path) { u_int status, id; @@ -733,11 +817,11 @@ do_rmdir(struct sftp_conn *conn, char *path) if (status != SSH2_FX_OK) error("Couldn't remove directory: %s", fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } Attrib * -do_stat(struct sftp_conn *conn, char *path, int quiet) +do_stat(struct sftp_conn *conn, const char *path, int quiet) { u_int id; @@ -751,7 +835,7 @@ do_stat(struct sftp_conn *conn, char *path, int quiet) } Attrib * -do_lstat(struct sftp_conn *conn, char *path, int quiet) +do_lstat(struct sftp_conn *conn, const char *path, int quiet) { u_int id; @@ -772,7 +856,8 @@ do_lstat(struct sftp_conn *conn, char *path, int quiet) #ifdef notyet Attrib * -do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) +do_fstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len, + int quiet) { u_int id; @@ -785,7 +870,7 @@ do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) #endif int -do_setstat(struct sftp_conn *conn, char *path, Attrib *a) +do_setstat(struct sftp_conn *conn, const char *path, Attrib *a) { u_int status, id; @@ -798,11 +883,11 @@ do_setstat(struct sftp_conn *conn, char *path, Attrib *a) error("Couldn't setstat on \"%s\": %s", path, fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } int -do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, +do_fsetstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len, Attrib *a) { u_int status, id; @@ -815,201 +900,263 @@ do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, if (status != SSH2_FX_OK) error("Couldn't fsetstat: %s", fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } char * -do_realpath(struct sftp_conn *conn, char *path) +do_realpath(struct sftp_conn *conn, const char *path) { - Buffer msg; - u_int type, expected_id, count, id; + struct sshbuf *msg; + u_int expected_id, count, id; char *filename, *longname; - Attrib *a; + Attrib a; + u_char type; + int r; expected_id = id = conn->msg_id++; send_string_request(conn, id, SSH2_FXP_REALPATH, path, strlen(path)); - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (id != expected_id) fatal("ID mismatch (%u != %u)", id, expected_id); if (type == SSH2_FXP_STATUS) { - u_int status = buffer_get_int(&msg); + u_int status; - error("Couldn't canonicalise: %s", fx2txt(status)); - buffer_free(&msg); + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + error("Couldn't canonicalize: %s", fx2txt(status)); + sshbuf_free(msg); return NULL; } else if (type != SSH2_FXP_NAME) fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", SSH2_FXP_NAME, type); - count = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &count)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (count != 1) fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); - filename = buffer_get_string(&msg, NULL); - longname = buffer_get_string(&msg, NULL); - a = decode_attrib(&msg); + if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 || + (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 || + (r = decode_attrib(msg, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - debug3("SSH_FXP_REALPATH %s -> %s", path, filename); + debug3("SSH_FXP_REALPATH %s -> %s size %lu", path, filename, + (unsigned long)a.size); - xfree(longname); + free(longname); - buffer_free(&msg); + sshbuf_free(msg); return(filename); } int -do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) +do_rename(struct sftp_conn *conn, const char *oldpath, const char *newpath, + int force_legacy) { - Buffer msg; + struct sshbuf *msg; u_int status, id; + int r, use_ext = (conn->exts & SFTP_EXT_POSIX_RENAME) && !force_legacy; - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); /* Send rename request */ id = conn->msg_id++; - if ((conn->exts & SFTP_EXT_POSIX_RENAME)) { - buffer_put_char(&msg, SSH2_FXP_EXTENDED); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, "posix-rename@openssh.com"); + if (use_ext) { + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, + "posix-rename@openssh.com")) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } else { - buffer_put_char(&msg, SSH2_FXP_RENAME); - buffer_put_int(&msg, id); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_RENAME)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } - buffer_put_cstring(&msg, oldpath); - buffer_put_cstring(&msg, newpath); - send_msg(conn, &msg); + if ((r = sshbuf_put_cstring(msg, oldpath)) != 0 || + (r = sshbuf_put_cstring(msg, newpath)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message %s \"%s\" -> \"%s\"", - (conn->exts & SFTP_EXT_POSIX_RENAME) ? "posix-rename@openssh.com" : + use_ext ? "posix-rename@openssh.com" : "SSH2_FXP_RENAME", oldpath, newpath); - buffer_free(&msg); + sshbuf_free(msg); status = get_status(conn, id); if (status != SSH2_FX_OK) error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } int -do_hardlink(struct sftp_conn *conn, char *oldpath, char *newpath) +do_hardlink(struct sftp_conn *conn, const char *oldpath, const char *newpath) { - Buffer msg; + struct sshbuf *msg; u_int status, id; + int r; - buffer_init(&msg); - - /* Send link request */ - id = conn->msg_id++; if ((conn->exts & SFTP_EXT_HARDLINK) == 0) { error("Server does not support hardlink@openssh.com extension"); return -1; } - buffer_put_char(&msg, SSH2_FXP_EXTENDED); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, "hardlink@openssh.com"); - buffer_put_cstring(&msg, oldpath); - buffer_put_cstring(&msg, newpath); - send_msg(conn, &msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + + /* Send link request */ + id = conn->msg_id++; + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, oldpath)) != 0 || + (r = sshbuf_put_cstring(msg, newpath)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"", oldpath, newpath); - buffer_free(&msg); + sshbuf_free(msg); status = get_status(conn, id); if (status != SSH2_FX_OK) error("Couldn't link file \"%s\" to \"%s\": %s", oldpath, newpath, fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; } int -do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) +do_symlink(struct sftp_conn *conn, const char *oldpath, const char *newpath) { - Buffer msg; + struct sshbuf *msg; u_int status, id; + int r; if (conn->version < 3) { error("This server does not support the symlink operation"); return(SSH2_FX_OP_UNSUPPORTED); } - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); /* Send symlink request */ id = conn->msg_id++; - buffer_put_char(&msg, SSH2_FXP_SYMLINK); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, oldpath); - buffer_put_cstring(&msg, newpath); - send_msg(conn, &msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_SYMLINK)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, oldpath)) != 0 || + (r = sshbuf_put_cstring(msg, newpath)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, newpath); - buffer_free(&msg); + sshbuf_free(msg); status = get_status(conn, id); if (status != SSH2_FX_OK) error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, newpath, fx2txt(status)); - return(status); + return status == SSH2_FX_OK ? 0 : -1; +} + +int +do_fsync(struct sftp_conn *conn, u_char *handle, u_int handle_len) +{ + struct sshbuf *msg; + u_int status, id; + int r; + + /* Silently return if the extension is not supported */ + if ((conn->exts & SFTP_EXT_FSYNC) == 0) + return -1; + + /* Send fsync request */ + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + id = conn->msg_id++; + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 || + (r = sshbuf_put_string(msg, handle, handle_len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); + debug3("Sent message fsync@openssh.com I:%u", id); + sshbuf_free(msg); + + status = get_status(conn, id); + if (status != SSH2_FX_OK) + error("Couldn't sync file: %s", fx2txt(status)); + + return status; } #ifdef notyet char * -do_readlink(struct sftp_conn *conn, char *path) +do_readlink(struct sftp_conn *conn, const char *path) { - Buffer msg; - u_int type, expected_id, count, id; + struct sshbuf *msg; + u_int expected_id, count, id; char *filename, *longname; - Attrib *a; + Attrib a; + u_char type; + int r; expected_id = id = conn->msg_id++; send_string_request(conn, id, SSH2_FXP_READLINK, path, strlen(path)); - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (id != expected_id) fatal("ID mismatch (%u != %u)", id, expected_id); if (type == SSH2_FXP_STATUS) { - u_int status = buffer_get_int(&msg); + u_int status; + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); error("Couldn't readlink: %s", fx2txt(status)); + sshbuf_free(msg); return(NULL); } else if (type != SSH2_FXP_NAME) fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", SSH2_FXP_NAME, type); - count = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &count)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (count != 1) fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); - filename = buffer_get_string(&msg, NULL); - longname = buffer_get_string(&msg, NULL); - a = decode_attrib(&msg); + if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 || + (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 || + (r = decode_attrib(msg, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug3("SSH_FXP_READLINK %s -> %s", path, filename); - xfree(longname); + free(longname); - buffer_free(&msg); + sshbuf_free(msg); - return(filename); + return filename; } #endif @@ -1017,8 +1164,9 @@ int do_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st, int quiet) { - Buffer msg; + struct sshbuf *msg; u_int id; + int r; if ((conn->exts & SFTP_EXT_STATVFS) == 0) { error("Server does not support statvfs@openssh.com extension"); @@ -1027,24 +1175,26 @@ do_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st, id = conn->msg_id++; - buffer_init(&msg); - buffer_clear(&msg); - buffer_put_char(&msg, SSH2_FXP_EXTENDED); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, "statvfs@openssh.com"); - buffer_put_cstring(&msg, path); - send_msg(conn, &msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + sshbuf_reset(msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, path)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); + sshbuf_free(msg); return get_decode_statvfs(conn, st, id, quiet); } #ifdef notyet int -do_fstatvfs(struct sftp_conn *conn, const char *handle, u_int handle_len, +do_fstatvfs(struct sftp_conn *conn, const u_char *handle, u_int handle_len, struct sftp_statvfs *st, int quiet) { - Buffer msg; + struct sshbuf *msg; u_int id; if ((conn->exts & SFTP_EXT_FSTATVFS) == 0) { @@ -1054,14 +1204,16 @@ do_fstatvfs(struct sftp_conn *conn, const char *handle, u_int handle_len, id = conn->msg_id++; - buffer_init(&msg); - buffer_clear(&msg); - buffer_put_char(&msg, SSH2_FXP_EXTENDED); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, "fstatvfs@openssh.com"); - buffer_put_string(&msg, handle, handle_len); - send_msg(conn, &msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + sshbuf_reset(msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 || + (r = sshbuf_put_string(msg, handle, handle_len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); + sshbuf_free(msg); return get_decode_statvfs(conn, st, id, quiet); } @@ -1069,41 +1221,48 @@ do_fstatvfs(struct sftp_conn *conn, const char *handle, u_int handle_len, static void send_read_request(struct sftp_conn *conn, u_int id, u_int64_t offset, - u_int len, char *handle, u_int handle_len) + u_int len, const u_char *handle, u_int handle_len) { - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_clear(&msg); - buffer_put_char(&msg, SSH2_FXP_READ); - buffer_put_int(&msg, id); - buffer_put_string(&msg, handle, handle_len); - buffer_put_int64(&msg, offset); - buffer_put_int(&msg, len); - send_msg(conn, &msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + sshbuf_reset(msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_READ)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, handle, handle_len)) != 0 || + (r = sshbuf_put_u64(msg, offset)) != 0 || + (r = sshbuf_put_u32(msg, len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); + sshbuf_free(msg); } int -do_download(struct sftp_conn *conn, char *remote_path, char *local_path, - Attrib *a, int pflag) +do_download(struct sftp_conn *conn, const char *remote_path, + const char *local_path, Attrib *a, int preserve_flag, int resume_flag, + int fsync_flag) { Attrib junk; - Buffer msg; - char *handle; - int local_fd, status = 0, write_error; - int read_error, write_errno; - u_int64_t offset, size; - u_int handle_len, mode, type, id, buflen, num_req, max_req; + struct sshbuf *msg; + u_char *handle; + int local_fd = -1, write_error; + int read_error, write_errno, reordered = 0, r; + u_int64_t offset = 0, size, highwater; + u_int mode, id, buflen, num_req, max_req, status = SSH2_FX_OK; off_t progress_counter; + size_t handle_len; + struct stat st; struct request { u_int id; - u_int len; + size_t len; u_int64_t offset; TAILQ_ENTRY(request) tq; }; TAILQ_HEAD(reqhead, request) requests; struct request *req; + u_char type; TAILQ_INIT(&requests); @@ -1128,57 +1287,81 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, size = 0; buflen = conn->transfer_buflen; - buffer_init(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + + attrib_clear(&junk); /* Send empty attributes */ /* Send open request */ id = conn->msg_id++; - buffer_put_char(&msg, SSH2_FXP_OPEN); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, remote_path); - buffer_put_int(&msg, SSH2_FXF_READ); - attrib_clear(&junk); /* Send empty attributes */ - encode_attrib(&msg, &junk); - send_msg(conn, &msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, remote_path)) != 0 || + (r = sshbuf_put_u32(msg, SSH2_FXF_READ)) != 0 || + (r = encode_attrib(msg, &junk)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); handle = get_handle(conn, id, &handle_len, "remote open(\"%s\")", remote_path); if (handle == NULL) { - buffer_free(&msg); + sshbuf_free(msg); return(-1); } - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME - local_fd = _open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode | S_IWRITE); + local_fd = _open(local_path, + O_WRONLY | O_CREAT | (resume_flag ? 0 : O_TRUNC), mode | S_IWUSR); #else - - local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, - mode | S_IWRITE); + local_fd = open(local_path, + O_WRONLY | O_CREAT | (resume_flag ? 0 : O_TRUNC), mode | S_IWUSR); // PRAGMA:TODO #endif - + if (local_fd == -1) { error("Couldn't open local file \"%s\" for writing: %s", local_path, strerror(errno)); - do_close(conn, handle, handle_len); - buffer_free(&msg); - xfree(handle); - return(-1); + goto fail; + } + offset = highwater = 0; + if (resume_flag) { + if (fstat(local_fd, &st) == -1) { + error("Unable to stat local file \"%s\": %s", + local_path, strerror(errno)); + goto fail; + } + if (st.st_size < 0) { + error("\"%s\" has negative size", local_path); + goto fail; + } + if ((u_int64_t)st.st_size > size) { + error("Unable to resume download of \"%s\": " + "local file is larger than remote", local_path); + fail: + do_close(conn, handle, handle_len); + sshbuf_free(msg); + free(handle); + if (local_fd != -1) + close(local_fd); + return -1; + } + offset = highwater = st.st_size; } /* Read from remote and write to local */ - write_error = read_error = write_errno = num_req = offset = 0; + write_error = read_error = write_errno = num_req = 0; max_req = 1; - progress_counter = 0; + progress_counter = offset; if (showprogress && size != 0) start_progress_meter(remote_path, size, &progress_counter); while (num_req > 0 || max_req > 0) { - char *data; - u_int len; + u_char *data; + size_t len; /* * Simulate EOF on interrupt: stop sending new requests and @@ -1196,7 +1379,7 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, (unsigned long long)offset, (unsigned long long)offset + buflen - 1, num_req, max_req); - req = xmalloc(sizeof(*req)); + req = xcalloc(1, sizeof(*req)); req->id = conn->msg_id++; req->len = buflen; req->offset = offset; @@ -1207,10 +1390,11 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, req->len, handle, handle_len); } - buffer_clear(&msg); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - id = buffer_get_int(&msg); + sshbuf_reset(msg); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug3("Received reply T:%u I:%u R:%d", type, id, max_req); /* Find the request in our queue */ @@ -1223,25 +1407,28 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, switch (type) { case SSH2_FXP_STATUS: - status = buffer_get_int(&msg); + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); if (status != SSH2_FX_EOF) read_error = 1; max_req = 0; TAILQ_REMOVE(&requests, req, tq); - xfree(req); + free(req); num_req--; break; case SSH2_FXP_DATA: - data = buffer_get_string(&msg, &len); + if ((r = sshbuf_get_string(msg, &data, &len)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); debug3("Received data %llu -> %llu", (unsigned long long)req->offset, (unsigned long long)req->offset + len - 1); if (len > req->len) fatal("Received more data than asked for " - "%u > %u", len, req->len); + "%zu > %zu", len, req->len); if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME atomicio(_write, local_fd, data, len) != len) && @@ -1256,12 +1443,16 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, write_error = 1; max_req = 0; } + else if (!reordered && req->offset <= highwater) + highwater = req->offset + len; + else if (!reordered && req->offset > highwater) + reordered = 1; progress_counter += len; - xfree(data); + free(data); if (len == req->len) { TAILQ_REMOVE(&requests, req, tq); - xfree(req); + free(req); num_req--; } else { /* Resend the request for the missing data */ @@ -1304,28 +1495,42 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, /* Sanity check */ if (TAILQ_FIRST(&requests) != NULL) fatal("Transfer complete, but requests still in queue"); - + /* Truncate at highest contiguous point to avoid holes on interrupt */ + if (read_error || write_error || interrupted) { + if (reordered && resume_flag) { + error("Unable to resume download of \"%s\": " + "server reordered requests", local_path); + } + debug("truncating at %llu", (unsigned long long)highwater); + if (ftruncate(local_fd, highwater) == -1) + error("ftruncate \"%s\": %s", local_path, + strerror(errno)); + } if (read_error) { error("Couldn't read from remote file \"%s\" : %s", remote_path, fx2txt(status)); + status = -1; do_close(conn, handle, handle_len); } else if (write_error) { error("Couldn't write to \"%s\": %s", local_path, strerror(write_errno)); - status = -1; + status = SSH2_FX_FAILURE; do_close(conn, handle, handle_len); } else { - status = do_close(conn, handle, handle_len); - + if (do_close(conn, handle, handle_len) != 0 || interrupted) + status = SSH2_FX_FAILURE; + else + status = SSH2_FX_OK; /* Override umask and utimes if asked */ #ifdef HAVE_FCHMOD - if (pflag && fchmod(local_fd, mode) == -1) + if (preserve_flag && fchmod(local_fd, mode) == -1) #else - if (pflag && chmod(local_path, mode) == -1) + if (preserve_flag && chmod(local_path, mode) == -1) #endif /* HAVE_FCHMOD */ error("Couldn't set mode on \"%s\": %s", local_path, strerror(errno)); - if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { + if (preserve_flag && + (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { struct timeval tv[2]; tv[0].tv_sec = a->atime; tv[1].tv_sec = a->mtime; @@ -1334,9 +1539,17 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, error("Can't set times on \"%s\": %s", local_path, strerror(errno)); } +#ifndef WIN32_FIXME +// PRAGMA:TODO + if (fsync_flag) { + debug("syncing \"%s\"", local_path); + if (fsync(local_fd) == -1) + error("Couldn't sync file \"%s\": %s", + local_path, strerror(errno)); + } +#endif } - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME _close(local_fd); @@ -1345,16 +1558,16 @@ do_download(struct sftp_conn *conn, char *remote_path, char *local_path, close(local_fd); #endif - - buffer_free(&msg); - xfree(handle); + sshbuf_free(msg); + free(handle); return(status); } static int -download_dir_internal(struct sftp_conn *conn, char *src, char *dst, - Attrib *dirattrib, int pflag, int printflag, int depth) +download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, + int depth, Attrib *dirattrib, int preserve_flag, int print_flag, + int resume_flag, int fsync_flag) { int i, ret = 0; SFTP_DIRENT **dir_entries; @@ -1375,7 +1588,7 @@ download_dir_internal(struct sftp_conn *conn, char *src, char *dst, error("\"%s\" is not a directory", src); return -1; } - if (printflag) + if (print_flag) printf("Retrieving %s\n", src); if (dirattrib->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) @@ -1406,12 +1619,13 @@ download_dir_internal(struct sftp_conn *conn, char *src, char *dst, strcmp(filename, "..") == 0) continue; if (download_dir_internal(conn, new_src, new_dst, - &(dir_entries[i]->a), pflag, printflag, - depth + 1) == -1) + depth + 1, &(dir_entries[i]->a), preserve_flag, + print_flag, resume_flag, fsync_flag) == -1) ret = -1; } else if (S_ISREG(dir_entries[i]->a.perm) ) { if (do_download(conn, new_src, new_dst, - &(dir_entries[i]->a), pflag) == -1) { + &(dir_entries[i]->a), preserve_flag, + resume_flag, fsync_flag) == -1) { error("Download of file %s to %s failed", new_src, new_dst); ret = -1; @@ -1419,11 +1633,11 @@ download_dir_internal(struct sftp_conn *conn, char *src, char *dst, } else logit("%s: not a regular file\n", new_src); - xfree(new_dst); - xfree(new_src); + free(new_dst); + free(new_src); } - if (pflag) { + if (preserve_flag) { if (dirattrib->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { struct timeval tv[2]; tv[0].tv_sec = dirattrib->atime; @@ -1443,35 +1657,37 @@ download_dir_internal(struct sftp_conn *conn, char *src, char *dst, } int -download_dir(struct sftp_conn *conn, char *src, char *dst, - Attrib *dirattrib, int pflag, int printflag) +download_dir(struct sftp_conn *conn, const char *src, const char *dst, + Attrib *dirattrib, int preserve_flag, int print_flag, int resume_flag, + int fsync_flag) { char *src_canon; int ret; if ((src_canon = do_realpath(conn, src)) == NULL) { - error("Unable to canonicalise path \"%s\"", src); + error("Unable to canonicalize path \"%s\"", src); return -1; } - ret = download_dir_internal(conn, src_canon, dst, - dirattrib, pflag, printflag, 0); - xfree(src_canon); + ret = download_dir_internal(conn, src_canon, dst, 0, + dirattrib, preserve_flag, print_flag, resume_flag, fsync_flag); + free(src_canon); return ret; } int -do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, - int pflag) +do_upload(struct sftp_conn *conn, const char *local_path, + const char *remote_path, int preserve_flag, int resume, int fsync_flag) { - int local_fd; - int status = SSH2_FX_OK; - u_int handle_len, id, type; - off_t offset; - char *handle, *data; - Buffer msg; + int r, local_fd; + u_int status = SSH2_FX_OK; + u_int id; + u_char type; + off_t offset, progress_counter; + u_char *handle, *data; + struct sshbuf *msg; struct stat sb; - Attrib a; + Attrib a, *c = NULL; u_int32_t startid; u_int32_t ackid; struct outstanding_ack { @@ -1482,10 +1698,11 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, }; TAILQ_HEAD(ackhead, outstanding_ack) acks; struct outstanding_ack *ack = NULL; + size_t handle_len; TAILQ_INIT(&acks); - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME if ((local_fd = _open(local_path, O_RDONLY, 0)) == -1) { @@ -1494,7 +1711,6 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { #endif - error("Couldn't open local file \"%s\" for reading: %s", local_path, strerror(errno)); return(-1); @@ -1507,8 +1723,7 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, } if (!S_ISREG(sb.st_mode)) { error("%s is not a regular file", local_path); - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME _close(local_fd); @@ -1517,7 +1732,6 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, close(local_fd); #endif - return(-1); } stat_to_attrib(&sb, &a); @@ -1525,28 +1739,50 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; a.perm &= 0777; - if (!pflag) + if (!preserve_flag) a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; - buffer_init(&msg); + if (resume) { + /* Get remote file size if it exists */ + if ((c = do_stat(conn, remote_path, 0)) == NULL) { + close(local_fd); + return -1; + } + + if ((off_t)c->size >= sb.st_size) { + error("destination file bigger or same size as " + "source file"); + close(local_fd); + return -1; + } + + if (lseek(local_fd, (off_t)c->size, SEEK_SET) == -1) { + close(local_fd); + return -1; + } + } + + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); /* Send open request */ id = conn->msg_id++; - buffer_put_char(&msg, SSH2_FXP_OPEN); - buffer_put_int(&msg, id); - buffer_put_cstring(&msg, remote_path); - buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); - encode_attrib(&msg, &a); - send_msg(conn, &msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_cstring(msg, remote_path)) != 0 || + (r = sshbuf_put_u32(msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT| + (resume ? SSH2_FXF_APPEND : SSH2_FXF_TRUNC))) != 0 || + (r = encode_attrib(msg, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); - buffer_clear(&msg); + sshbuf_reset(msg); handle = get_handle(conn, id, &handle_len, "remote open(\"%s\")", remote_path); if (handle == NULL) { - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME _close(local_fd); @@ -1556,7 +1792,7 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, #endif - buffer_free(&msg); + sshbuf_free(msg); return -1; } @@ -1564,9 +1800,10 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, data = xmalloc(conn->transfer_buflen); /* Read from local and write to remote */ - offset = 0; + offset = progress_counter = (resume ? c->size : 0); if (showprogress) - start_progress_meter(local_path, sb.st_size, &offset); + start_progress_meter(local_path, sb.st_size, + &progress_counter); for (;;) { int len; @@ -1580,8 +1817,7 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, if (interrupted || status != SSH2_FX_OK) len = 0; else do - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME len = _read(local_fd, data, conn->transfer_buflen); @@ -1599,19 +1835,22 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, strerror(errno)); if (len != 0) { - ack = xmalloc(sizeof(*ack)); + ack = xcalloc(1, sizeof(*ack)); ack->id = ++id; ack->offset = offset; ack->len = len; TAILQ_INSERT_TAIL(&acks, ack, tq); - buffer_clear(&msg); - buffer_put_char(&msg, SSH2_FXP_WRITE); - buffer_put_int(&msg, ack->id); - buffer_put_string(&msg, handle, handle_len); - buffer_put_int64(&msg, offset); - buffer_put_string(&msg, data, len); - send_msg(conn, &msg); + sshbuf_reset(msg); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_WRITE)) != 0 || + (r = sshbuf_put_u32(msg, ack->id)) != 0 || + (r = sshbuf_put_string(msg, handle, + handle_len)) != 0 || + (r = sshbuf_put_u64(msg, offset)) != 0 || + (r = sshbuf_put_string(msg, data, len)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + send_msg(conn, msg); debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", id, (unsigned long long)offset, len); } else if (TAILQ_FIRST(&acks) == NULL) @@ -1622,50 +1861,55 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, if (id == startid || len == 0 || id - ackid >= conn->num_requests) { - u_int r_id; + u_int rid; - buffer_clear(&msg); - get_msg(conn, &msg); - type = buffer_get_char(&msg); - r_id = buffer_get_int(&msg); + sshbuf_reset(msg); + get_msg(conn, msg); + if ((r = sshbuf_get_u8(msg, &type)) != 0 || + (r = sshbuf_get_u32(msg, &rid)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); if (type != SSH2_FXP_STATUS) fatal("Expected SSH2_FXP_STATUS(%d) packet, " "got %d", SSH2_FXP_STATUS, type); - status = buffer_get_int(&msg); - debug3("SSH2_FXP_STATUS %d", status); + if ((r = sshbuf_get_u32(msg, &status)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + debug3("SSH2_FXP_STATUS %u", status); /* Find the request in our queue */ for (ack = TAILQ_FIRST(&acks); - ack != NULL && ack->id != r_id; + ack != NULL && ack->id != rid; ack = TAILQ_NEXT(ack, tq)) ; if (ack == NULL) - fatal("Can't find request for ID %u", r_id); + fatal("Can't find request for ID %u", rid); TAILQ_REMOVE(&acks, ack, tq); debug3("In write loop, ack for %u %u bytes at %lld", ack->id, ack->len, (long long)ack->offset); ++ackid; - xfree(ack); + progress_counter += ack->len; + free(ack); } offset += len; if (offset < 0) fatal("%s: offset < 0", __func__); } - buffer_free(&msg); + sshbuf_free(msg); if (showprogress) stop_progress_meter(); - xfree(data); + free(data); if (status != SSH2_FX_OK) { error("Couldn't write to remote file \"%s\": %s", remote_path, fx2txt(status)); - status = -1; + status = SSH2_FX_FAILURE; } - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME if (_close(local_fd) == -1) { @@ -1675,28 +1919,32 @@ do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, if (close(local_fd) == -1) { #endif - error("Couldn't close local file \"%s\": %s", local_path, strerror(errno)); - status = -1; + status = SSH2_FX_FAILURE; } /* Override umask and utimes if asked */ - if (pflag) + if (preserve_flag) do_fsetstat(conn, handle, handle_len, &a); - if (do_close(conn, handle, handle_len) != SSH2_FX_OK) - status = -1; - xfree(handle); + if (fsync_flag) + (void)do_fsync(conn, handle, handle_len); - return status; + if (do_close(conn, handle, handle_len) != SSH2_FX_OK) + status = SSH2_FX_FAILURE; + + free(handle); + + return status == SSH2_FX_OK ? 0 : -1; } static int -upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, - int pflag, int printflag, int depth) +upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, + int depth, int preserve_flag, int print_flag, int resume, int fsync_flag) { - int ret = 0, status; + int ret = 0; + u_int status; DIR *dirp; struct dirent *dp; char *filename, *new_src, *new_dst; @@ -1717,7 +1965,7 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, error("\"%s\" is not a directory", src); return -1; } - if (printflag) + if (print_flag) printf("Entering %s\n", src); attrib_clear(&a); @@ -1725,9 +1973,9 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; a.perm &= 01777; - if (!pflag) + if (!preserve_flag) a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; - + status = do_mkdir(conn, dst, &a, 0); /* * we lack a portable status for errno EEXIST, @@ -1737,7 +1985,7 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, if (status != SSH2_FX_OK) { if (status != SSH2_FX_FAILURE) return -1; - if (do_stat(conn, dst, 0) == NULL) + if (do_stat(conn, dst, 0) == NULL) return -1; } @@ -1745,7 +1993,7 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, error("Failed to open dir \"%s\": %s", src, strerror(errno)); return -1; } - + while (((dp = readdir(dirp)) != NULL) && !interrupted) { if (dp->d_ino == 0) continue; @@ -1763,18 +2011,20 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, continue; if (upload_dir_internal(conn, new_src, new_dst, - pflag, printflag, depth + 1) == -1) + depth + 1, preserve_flag, print_flag, resume, + fsync_flag) == -1) ret = -1; } else if (S_ISREG(sb.st_mode)) { - if (do_upload(conn, new_src, new_dst, pflag) == -1) { + if (do_upload(conn, new_src, new_dst, + preserve_flag, resume, fsync_flag) == -1) { error("Uploading of file %s to %s failed!", new_src, new_dst); ret = -1; } } else logit("%s: not a regular file\n", filename); - xfree(new_dst); - xfree(new_src); + free(new_dst); + free(new_src); } do_setstat(conn, dst, &a); @@ -1784,24 +2034,26 @@ upload_dir_internal(struct sftp_conn *conn, char *src, char *dst, } int -upload_dir(struct sftp_conn *conn, char *src, char *dst, int printflag, - int pflag) +upload_dir(struct sftp_conn *conn, const char *src, const char *dst, + int preserve_flag, int print_flag, int resume, int fsync_flag) { char *dst_canon; int ret; if ((dst_canon = do_realpath(conn, dst)) == NULL) { - error("Unable to canonicalise path \"%s\"", dst); + error("Unable to canonicalize path \"%s\"", dst); return -1; } - ret = upload_dir_internal(conn, src, dst_canon, pflag, printflag, 0); - xfree(dst_canon); + ret = upload_dir_internal(conn, src, dst_canon, 0, preserve_flag, + print_flag, resume, fsync_flag); + + free(dst_canon); return ret; } char * -path_append(char *p1, char *p2) +path_append(const char *p1, const char *p2) { char *ret; size_t len = strlen(p1) + strlen(p2) + 2; @@ -1814,3 +2066,4 @@ path_append(char *p1, char *p2) return(ret); } + diff --git a/sftp-client.h b/sftp-client.h index aef54ef..f814b07 100644 --- a/sftp-client.h +++ b/sftp-client.h @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-client.h,v 1.20 2010/12/04 00:18:01 djm Exp $ */ +/* $OpenBSD: sftp-client.h,v 1.27 2015/05/08 06:45:13 djm Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller @@ -56,77 +56,81 @@ struct sftp_conn *do_init(int, int, u_int, u_int, u_int64_t); u_int sftp_proto_version(struct sftp_conn *); /* Close file referred to by 'handle' */ -int do_close(struct sftp_conn *, char *, u_int); +int do_close(struct sftp_conn *, const u_char *, u_int); /* Read contents of 'path' to NULL-terminated array 'dir' */ -int do_readdir(struct sftp_conn *, char *, SFTP_DIRENT ***); +int do_readdir(struct sftp_conn *, const char *, SFTP_DIRENT ***); /* Frees a NULL-terminated array of SFTP_DIRENTs (eg. from do_readdir) */ void free_sftp_dirents(SFTP_DIRENT **); /* Delete file 'path' */ -int do_rm(struct sftp_conn *, char *); +int do_rm(struct sftp_conn *, const char *); /* Create directory 'path' */ -int do_mkdir(struct sftp_conn *, char *, Attrib *, int); +int do_mkdir(struct sftp_conn *, const char *, Attrib *, int); /* Remove directory 'path' */ -int do_rmdir(struct sftp_conn *, char *); +int do_rmdir(struct sftp_conn *, const char *); /* Get file attributes of 'path' (follows symlinks) */ -Attrib *do_stat(struct sftp_conn *, char *, int); +Attrib *do_stat(struct sftp_conn *, const char *, int); /* Get file attributes of 'path' (does not follow symlinks) */ -Attrib *do_lstat(struct sftp_conn *, char *, int); +Attrib *do_lstat(struct sftp_conn *, const char *, int); /* Set file attributes of 'path' */ -int do_setstat(struct sftp_conn *, char *, Attrib *); +int do_setstat(struct sftp_conn *, const char *, Attrib *); /* Set file attributes of open file 'handle' */ -int do_fsetstat(struct sftp_conn *, char *, u_int, Attrib *); +int do_fsetstat(struct sftp_conn *, const u_char *, u_int, Attrib *); /* Canonicalise 'path' - caller must free result */ -char *do_realpath(struct sftp_conn *, char *); +char *do_realpath(struct sftp_conn *, const char *); /* Get statistics for filesystem hosting file at "path" */ int do_statvfs(struct sftp_conn *, const char *, struct sftp_statvfs *, int); /* Rename 'oldpath' to 'newpath' */ -int do_rename(struct sftp_conn *, char *, char *); +int do_rename(struct sftp_conn *, const char *, const char *, int force_legacy); /* Link 'oldpath' to 'newpath' */ -int do_hardlink(struct sftp_conn *, char *, char *); +int do_hardlink(struct sftp_conn *, const char *, const char *); /* Rename 'oldpath' to 'newpath' */ -int do_symlink(struct sftp_conn *, char *, char *); +int do_symlink(struct sftp_conn *, const char *, const char *); -/* XXX: add callbacks to do_download/do_upload so we can do progress meter */ +/* Call fsync() on open file 'handle' */ +int do_fsync(struct sftp_conn *conn, u_char *, u_int); /* * Download 'remote_path' to 'local_path'. Preserve permissions and times * if 'pflag' is set */ -int do_download(struct sftp_conn *, char *, char *, Attrib *, int); +int do_download(struct sftp_conn *, const char *, const char *, + Attrib *, int, int, int); /* - * Recursively download 'remote_directory' to 'local_directory'. Preserve + * Recursively download 'remote_directory' to 'local_directory'. Preserve * times if 'pflag' is set */ -int download_dir(struct sftp_conn *, char *, char *, Attrib *, int, int); +int download_dir(struct sftp_conn *, const char *, const char *, + Attrib *, int, int, int, int); /* * Upload 'local_path' to 'remote_path'. Preserve permissions and times * if 'pflag' is set */ -int do_upload(struct sftp_conn *, char *, char *, int); +int do_upload(struct sftp_conn *, const char *, const char *, int, int, int); /* - * Recursively upload 'local_directory' to 'remote_directory'. Preserve + * Recursively upload 'local_directory' to 'remote_directory'. Preserve * times if 'pflag' is set */ -int upload_dir(struct sftp_conn *, char *, char *, int, int); +int upload_dir(struct sftp_conn *, const char *, const char *, int, int, int, + int); /* Concatenate paths, taking care of slashes. Caller must free result. */ -char *path_append(char *, char *); +char *path_append(const char *, const char *); #endif diff --git a/sftp-common.c b/sftp-common.c index 628fa9a..22e1218 100644 --- a/sftp-common.c +++ b/sftp-common.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-common.c,v 1.23 2010/01/15 09:24:23 markus Exp $ */ +/* $OpenBSD: sftp-common.c,v 1.28 2015/01/20 23:14:00 deraadt Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2001 Damien Miller. All rights reserved. @@ -35,13 +35,14 @@ #undef KRB5 #endif +#include /* MAX */ #include #include -#include #include #include #include +#include #include #include #include @@ -50,7 +51,8 @@ #endif #include "xmalloc.h" -#include "buffer.h" +#include "ssherr.h" +#include "sshbuf.h" #include "log.h" #include "sftp.h" @@ -108,59 +110,81 @@ attrib_to_stat(const Attrib *a, struct stat *st) } /* Decode attributes in buffer */ -Attrib * -decode_attrib(Buffer *b) +int +decode_attrib(struct sshbuf *b, Attrib *a) { - static Attrib a; + int r; - attrib_clear(&a); - a.flags = buffer_get_int(b); - if (a.flags & SSH2_FILEXFER_ATTR_SIZE) - a.size = buffer_get_int64(b); - if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { - a.uid = buffer_get_int(b); - a.gid = buffer_get_int(b); + attrib_clear(a); + if ((r = sshbuf_get_u32(b, &a->flags)) != 0) + return r; + if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if ((r = sshbuf_get_u64(b, &a->size)) != 0) + return r; } - if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) - a.perm = buffer_get_int(b); - if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { - a.atime = buffer_get_int(b); - a.mtime = buffer_get_int(b); + if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + if ((r = sshbuf_get_u32(b, &a->uid)) != 0 || + (r = sshbuf_get_u32(b, &a->gid)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + if ((r = sshbuf_get_u32(b, &a->perm)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + if ((r = sshbuf_get_u32(b, &a->atime)) != 0 || + (r = sshbuf_get_u32(b, &a->mtime)) != 0) + return r; } /* vendor-specific extensions */ - if (a.flags & SSH2_FILEXFER_ATTR_EXTENDED) { - char *type, *data; - int i, count; + if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) { + char *type; + u_char *data; + size_t dlen; + u_int i, count; - count = buffer_get_int(b); + if ((r = sshbuf_get_u32(b, &count)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); for (i = 0; i < count; i++) { - type = buffer_get_string(b, NULL); - data = buffer_get_string(b, NULL); - debug3("Got file attribute \"%s\"", type); - xfree(type); - xfree(data); + if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 || + (r = sshbuf_get_string(b, &data, &dlen)) != 0) + return r; + debug3("Got file attribute \"%.100s\" len %zu", + type, dlen); + free(type); + free(data); } } - return &a; + return 0; } /* Encode attributes to buffer */ -void -encode_attrib(Buffer *b, const Attrib *a) +int +encode_attrib(struct sshbuf *b, const Attrib *a) { - buffer_put_int(b, a->flags); - if (a->flags & SSH2_FILEXFER_ATTR_SIZE) - buffer_put_int64(b, a->size); + int r; + + if ((r = sshbuf_put_u32(b, a->flags)) != 0) + return r; + if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if ((r = sshbuf_put_u64(b, a->size)) != 0) + return r; + } if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { - buffer_put_int(b, a->uid); - buffer_put_int(b, a->gid); + if ((r = sshbuf_put_u32(b, a->uid)) != 0 || + (r = sshbuf_put_u32(b, a->gid)) != 0) + return r; + } + if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + if ((r = sshbuf_put_u32(b, a->perm)) != 0) + return r; } - if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) - buffer_put_int(b, a->perm); if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { - buffer_put_int(b, a->atime); - buffer_put_int(b, a->mtime); + if ((r = sshbuf_put_u32(b, a->atime)) != 0 || + (r = sshbuf_put_u32(b, a->mtime)) != 0) + return r; } + return 0; } /* Convert from SSH2_FX_ status to text error message */ @@ -203,6 +227,7 @@ ls_file(const char *name, const struct stat *st, int remote, int si_units) char *user, *group; char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; char sbuf[FMT_SCALED_STRSIZE]; + time_t now; #ifndef WIN32_FIXME strmode(st->st_mode, mode); @@ -212,7 +237,6 @@ ls_file(const char *name, const struct stat *st, int remote, int si_units) } else { snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid); user = ubuf; - #ifdef WIN32_FIXME snprintf(gbuf, sizeof gbuf, "%u", (u_int) st -> st_gid); @@ -230,7 +254,9 @@ ls_file(const char *name, const struct stat *st, int remote, int si_units) } if (ltime != NULL) { - if (time(NULL) - st->st_mtime < (365*24*60*60)/2) + now = time(NULL); + if (now - (365*24*60*60)/2 < st->st_mtime && + now >= st->st_mtime) sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); else sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); @@ -249,6 +275,5 @@ ls_file(const char *name, const struct stat *st, int remote, int si_units) (u_int)st->st_nlink, ulen, user, glen, group, (unsigned long long)st->st_size, tbuf, name); } - return xstrdup(buf); } diff --git a/sftp-common.h b/sftp-common.h index 9ed86c0..2e778a9 100644 --- a/sftp-common.h +++ b/sftp-common.h @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-common.h,v 1.11 2010/01/13 01:40:16 djm Exp $ */ +/* $OpenBSD: sftp-common.h,v 1.12 2015/01/14 13:54:13 djm Exp $ */ /* * Copyright (c) 2001 Markus Friedl. All rights reserved. @@ -28,6 +28,7 @@ /* Maximum packet that we are willing to send/accept */ #define SFTP_MAX_MSG_LENGTH (256 * 1024) +struct sshbuf; typedef struct Attrib Attrib; /* File attributes */ @@ -44,8 +45,8 @@ struct Attrib { void attrib_clear(Attrib *); void stat_to_attrib(const struct stat *, Attrib *); void attrib_to_stat(const Attrib *, struct stat *); -Attrib *decode_attrib(Buffer *); -void encode_attrib(Buffer *, const Attrib *); +int decode_attrib(struct sshbuf *, Attrib *); +int encode_attrib(struct sshbuf *, const Attrib *); char *ls_file(const char *, const struct stat *, int, int); const char *fx2txt(int); diff --git a/sftp-glob.c b/sftp-glob.c index cdc2708..43a1beb 100644 --- a/sftp-glob.c +++ b/sftp-glob.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-glob.c,v 1.22 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: sftp-glob.c,v 1.27 2015/01/14 13:54:13 djm Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller * @@ -23,11 +23,12 @@ #endif #include +#include #include +#include #include "xmalloc.h" #include "sftp.h" -#include "buffer.h" #include "sftp-common.h" #include "sftp-client.h" @@ -48,10 +49,10 @@ fudge_opendir(const char *path) { struct SFTP_OPENDIR *r; - r = xmalloc(sizeof(*r)); + r = xcalloc(1, sizeof(*r)); if (do_readdir(cur.conn, (char *)path, &r->dir)) { - xfree(r); + free(r); return(NULL); } @@ -103,7 +104,7 @@ static void fudge_closedir(struct SFTP_OPENDIR *od) { free_sftp_dirents(od->dir); - xfree(od); + free(od); } static int @@ -111,7 +112,7 @@ fudge_lstat(const char *path, struct stat *st) { Attrib *a; - if (!(a = do_lstat(cur.conn, (char *)path, 0))) + if (!(a = do_lstat(cur.conn, (char *)path, 1))) return(-1); attrib_to_stat(a, st); @@ -124,7 +125,7 @@ fudge_stat(const char *path, struct stat *st) { Attrib *a; - if (!(a = do_stat(cur.conn, (char *)path, 0))) + if (!(a = do_stat(cur.conn, (char *)path, 1))) return(-1); attrib_to_stat(a, st); diff --git a/sftp-server.c b/sftp-server.c index 6954b5f..c09a909 100644 --- a/sftp-server.c +++ b/sftp-server.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-server.c,v 1.94 2011/06/17 21:46:16 djm Exp $ */ +/* $OpenBSD: sftp-server.c,v 1.107 2015/08/20 22:32:42 deraadt Exp $ */ /* * Copyright (c) 2000-2004 Markus Friedl. All rights reserved. * @@ -26,8 +26,8 @@ #undef KRB5 #endif +#include /* MIN */ #include -#include #include #ifdef HAVE_SYS_TIME_H # include @@ -38,6 +38,9 @@ #ifdef HAVE_SYS_STATVFS_H #include #endif +#ifdef HAVE_SYS_PRCTL_H +#include +#endif #include #include @@ -46,21 +49,21 @@ #include #include #include -#include #include #include #include #include "xmalloc.h" -#include "buffer.h" +#include "sshbuf.h" +#include "ssherr.h" #include "log.h" #include "misc.h" +#include "match.h" #include "uidswap.h" #include "sftp.h" #include "sftp-common.h" - #ifdef WIN32_FIXME #undef select @@ -112,30 +115,30 @@ #endif /* WIN32_FIXME */ -/* helper */ -#define get_int64() buffer_get_int64(&iqueue); -#define get_int() buffer_get_int(&iqueue); -#define get_string(lenp) buffer_get_string(&iqueue, lenp); - /* Our verbosity */ -LogLevel log_level = SYSLOG_LEVEL_ERROR; +static LogLevel log_level = SYSLOG_LEVEL_ERROR; /* Our client */ -struct passwd *pw = NULL; -char *client_addr = NULL; +static struct passwd *pw = NULL; +static char *client_addr = NULL; /* input and output queue */ -Buffer iqueue; -Buffer oqueue; +struct sshbuf *iqueue; +struct sshbuf *oqueue; /* Version of client */ -u_int version; +static u_int version; + +/* SSH2_FXP_INIT received */ +static int init_done; /* Disable writes */ -int readonly = 0; +static int readonly = 0; + +/* Requests that are allowed/denied */ +static char *request_whitelist, *request_blacklist; /* portable attributes, etc. */ - typedef struct Stat Stat; struct Stat { @@ -144,6 +147,102 @@ struct Stat { Attrib attrib; }; +/* Packet handlers */ +static void process_open(u_int32_t id); +static void process_close(u_int32_t id); +static void process_read(u_int32_t id); +static void process_write(u_int32_t id); +static void process_stat(u_int32_t id); +static void process_lstat(u_int32_t id); +static void process_fstat(u_int32_t id); +static void process_setstat(u_int32_t id); +static void process_fsetstat(u_int32_t id); +static void process_opendir(u_int32_t id); +static void process_readdir(u_int32_t id); +static void process_remove(u_int32_t id); +static void process_mkdir(u_int32_t id); +static void process_rmdir(u_int32_t id); +static void process_realpath(u_int32_t id); +static void process_rename(u_int32_t id); +static void process_readlink(u_int32_t id); +static void process_symlink(u_int32_t id); +static void process_extended_posix_rename(u_int32_t id); +static void process_extended_statvfs(u_int32_t id); +static void process_extended_fstatvfs(u_int32_t id); +static void process_extended_hardlink(u_int32_t id); +static void process_extended_fsync(u_int32_t id); +static void process_extended(u_int32_t id); + +struct sftp_handler { + const char *name; /* user-visible name for fine-grained perms */ + const char *ext_name; /* extended request name */ + u_int type; /* packet type, for non extended packets */ + void (*handler)(u_int32_t); + int does_write; /* if nonzero, banned for readonly mode */ +}; + +struct sftp_handler handlers[] = { + /* NB. SSH2_FXP_OPEN does the readonly check in the handler itself */ + { "open", NULL, SSH2_FXP_OPEN, process_open, 0 }, + { "close", NULL, SSH2_FXP_CLOSE, process_close, 0 }, + { "read", NULL, SSH2_FXP_READ, process_read, 0 }, + { "write", NULL, SSH2_FXP_WRITE, process_write, 1 }, + { "lstat", NULL, SSH2_FXP_LSTAT, process_lstat, 0 }, + { "fstat", NULL, SSH2_FXP_FSTAT, process_fstat, 0 }, + { "setstat", NULL, SSH2_FXP_SETSTAT, process_setstat, 1 }, + { "fsetstat", NULL, SSH2_FXP_FSETSTAT, process_fsetstat, 1 }, + { "opendir", NULL, SSH2_FXP_OPENDIR, process_opendir, 0 }, + { "readdir", NULL, SSH2_FXP_READDIR, process_readdir, 0 }, + { "remove", NULL, SSH2_FXP_REMOVE, process_remove, 1 }, + { "mkdir", NULL, SSH2_FXP_MKDIR, process_mkdir, 1 }, + { "rmdir", NULL, SSH2_FXP_RMDIR, process_rmdir, 1 }, + { "realpath", NULL, SSH2_FXP_REALPATH, process_realpath, 0 }, + { "stat", NULL, SSH2_FXP_STAT, process_stat, 0 }, + { "rename", NULL, SSH2_FXP_RENAME, process_rename, 1 }, + { "readlink", NULL, SSH2_FXP_READLINK, process_readlink, 0 }, + { "symlink", NULL, SSH2_FXP_SYMLINK, process_symlink, 1 }, + { NULL, NULL, 0, NULL, 0 } +}; + +/* SSH2_FXP_EXTENDED submessages */ +struct sftp_handler extended_handlers[] = { + { "posix-rename", "posix-rename@openssh.com", 0, + process_extended_posix_rename, 1 }, + { "statvfs", "statvfs@openssh.com", 0, process_extended_statvfs, 0 }, + { "fstatvfs", "fstatvfs@openssh.com", 0, process_extended_fstatvfs, 0 }, + { "hardlink", "hardlink@openssh.com", 0, process_extended_hardlink, 1 }, + { "fsync", "fsync@openssh.com", 0, process_extended_fsync, 1 }, + { NULL, NULL, 0, NULL, 0 } +}; + +static int +request_permitted(struct sftp_handler *h) +{ + char *result; + + if (readonly && h->does_write) { + verbose("Refusing %s request in read-only mode", h->name); + return 0; + } + if (request_blacklist != NULL && + ((result = match_list(h->name, request_blacklist, NULL))) != NULL) { + free(result); + verbose("Refusing blacklisted %s request", h->name); + return 0; + } + if (request_whitelist != NULL && + ((result = match_list(h->name, request_whitelist, NULL))) != NULL) { + free(result); + debug2("Permitting whitelisted %s request", h->name); + return 1; + } + if (request_whitelist != NULL) { + verbose("Refusing non-whitelisted %s request", h->name); + return 0; + } + return 1; +} + static int errno_to_portable(int unixerrno) { @@ -193,6 +292,8 @@ flags_from_portable(int pflags) } else if (pflags & SSH2_FXF_WRITE) { flags = O_WRONLY; } + if (pflags & SSH2_FXF_APPEND) + flags |= O_APPEND; if (pflags & SSH2_FXF_CREAT) flags |= O_CREAT; if (pflags & SSH2_FXF_TRUNC) @@ -219,6 +320,8 @@ string_from_portable(int pflags) PAPPEND("READ") if (pflags & SSH2_FXF_WRITE) PAPPEND("WRITE") + if (pflags & SSH2_FXF_APPEND) + PAPPEND("APPEND") if (pflags & SSH2_FXF_CREAT) PAPPEND("CREATE") if (pflags & SSH2_FXF_TRUNC) @@ -229,12 +332,6 @@ string_from_portable(int pflags) return ret; } -static Attrib * -get_attrib(void) -{ - return decode_attrib(&iqueue); -} - /* handle handles */ typedef struct Handle Handle; @@ -242,6 +339,7 @@ struct Handle { int use; DIR *dirp; int fd; + int flags; char *name; u_int64_t bytes_read, bytes_write; int next_unused; @@ -265,7 +363,7 @@ static void handle_unused(int i) } static int -handle_new(int use, const char *name, int fd, DIR *dirp) +handle_new(int use, const char *name, int fd, int flags, DIR *dirp) { int i; @@ -273,7 +371,7 @@ handle_new(int use, const char *name, int fd, DIR *dirp) if (num_handles + 1 <= num_handles) return -1; num_handles++; - handles = xrealloc(handles, num_handles, sizeof(Handle)); + handles = xreallocarray(handles, num_handles, sizeof(Handle)); handle_unused(num_handles - 1); } @@ -283,6 +381,7 @@ handle_new(int use, const char *name, int fd, DIR *dirp) handles[i].use = use; handles[i].dirp = dirp; handles[i].fd = fd; + handles[i].flags = flags; handles[i].name = xstrdup(name); handles[i].bytes_read = handles[i].bytes_write = 0; @@ -296,7 +395,7 @@ handle_is_ok(int i, int type) } static int -handle_to_string(int handle, char **stringp, int *hlenp) +handle_to_string(int handle, u_char **stringp, int *hlenp) { if (stringp == NULL || hlenp == NULL) return -1; @@ -307,7 +406,7 @@ handle_to_string(int handle, char **stringp, int *hlenp) } static int -handle_from_string(const char *handle, u_int hlen) +handle_from_string(const u_char *handle, u_int hlen) { int val; @@ -345,6 +444,14 @@ handle_to_fd(int handle) return -1; } +static int +handle_to_flags(int handle) +{ + if (handle_is_ok(handle, HANDLE_FILE)) + return handles[handle].flags; + return 0; +} + static void handle_update_read(int handle, ssize_t bytes) { @@ -382,11 +489,11 @@ handle_close(int handle) if (handle_is_ok(handle, HANDLE_FILE)) { ret = close(handles[handle].fd); - xfree(handles[handle].name); + free(handles[handle].name); handle_unused(handle); } else if (handle_is_ok(handle, HANDLE_DIR)) { ret = closedir(handles[handle].dirp); - xfree(handles[handle].name); + free(handles[handle].name); handle_unused(handle); } else { errno = ENOENT; @@ -421,29 +528,31 @@ handle_log_exit(void) } static int -get_handle(void) +get_handle(struct sshbuf *queue, int *hp) { - char *handle; - int val = -1; - u_int hlen; + u_char *handle; + int r; + size_t hlen; - handle = get_string(&hlen); + *hp = -1; + if ((r = sshbuf_get_string(queue, &handle, &hlen)) != 0) + return r; if (hlen < 256) - val = handle_from_string(handle, hlen); - xfree(handle); - return val; + *hp = handle_from_string(handle, hlen); + free(handle); + return 0; } /* send replies */ static void -send_msg(Buffer *m) +send_msg(struct sshbuf *m) { - int mlen = buffer_len(m); + int r; - buffer_put_int(&oqueue, mlen); - buffer_append(&oqueue, buffer_ptr(m), mlen); - buffer_consume(m, mlen); + if ((r = sshbuf_put_stringb(oqueue, m)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_reset(m); } static const char * @@ -467,38 +576,46 @@ status_to_message(u_int32_t status) static void send_status(u_int32_t id, u_int32_t status) { - Buffer msg; + struct sshbuf *msg; + int r; debug3("request %u: sent status %u", id, status); if (log_level > SYSLOG_LEVEL_VERBOSE || (status != SSH2_FX_OK && status != SSH2_FX_EOF)) logit("sent status %s", status_to_message(status)); - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_STATUS); - buffer_put_int(&msg, id); - buffer_put_int(&msg, status); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_STATUS)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_u32(msg, status)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (version >= 3) { - buffer_put_cstring(&msg, status_to_message(status)); - buffer_put_cstring(&msg, ""); + if ((r = sshbuf_put_cstring(msg, + status_to_message(status))) != 0 || + (r = sshbuf_put_cstring(msg, "")) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } - send_msg(&msg); - buffer_free(&msg); + send_msg(msg); + sshbuf_free(msg); } static void -send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) +send_data_or_handle(char type, u_int32_t id, const u_char *data, int dlen) { - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_put_char(&msg, type); - buffer_put_int(&msg, id); - buffer_put_string(&msg, data, dlen); - send_msg(&msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, type)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_string(msg, data, dlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(msg); + sshbuf_free(msg); } static void -send_data(u_int32_t id, const char *data, int dlen) +send_data(u_int32_t id, const u_char *data, int dlen) { debug("request %u: sent data len %d", id, dlen); send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); @@ -507,74 +624,83 @@ send_data(u_int32_t id, const char *data, int dlen) static void send_handle(u_int32_t id, int handle) { - char *string; + u_char *string; int hlen; handle_to_string(handle, &string, &hlen); debug("request %u: sent handle handle %d", id, handle); send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); - xfree(string); + free(string); } static void send_names(u_int32_t id, int count, const Stat *stats) { - Buffer msg; - int i; + struct sshbuf *msg; + int i, r; - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_NAME); - buffer_put_int(&msg, id); - buffer_put_int(&msg, count); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_NAME)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_u32(msg, count)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug("request %u: sent names count %d", id, count); for (i = 0; i < count; i++) { - buffer_put_cstring(&msg, stats[i].name); - buffer_put_cstring(&msg, stats[i].long_name); - encode_attrib(&msg, &stats[i].attrib); + if ((r = sshbuf_put_cstring(msg, stats[i].name)) != 0 || + (r = sshbuf_put_cstring(msg, stats[i].long_name)) != 0 || + (r = encode_attrib(msg, &stats[i].attrib)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } - send_msg(&msg); - buffer_free(&msg); + send_msg(msg); + sshbuf_free(msg); } static void send_attrib(u_int32_t id, const Attrib *a) { - Buffer msg; + struct sshbuf *msg; + int r; debug("request %u: sent attrib have 0x%x", id, a->flags); - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_ATTRS); - buffer_put_int(&msg, id); - encode_attrib(&msg, a); - send_msg(&msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_ATTRS)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = encode_attrib(msg, a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(msg); + sshbuf_free(msg); } static void send_statvfs(u_int32_t id, struct statvfs *st) { - Buffer msg; + struct sshbuf *msg; u_int64_t flag; + int r; flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0; flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0; - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_EXTENDED_REPLY); - buffer_put_int(&msg, id); - buffer_put_int64(&msg, st->f_bsize); - buffer_put_int64(&msg, st->f_frsize); - buffer_put_int64(&msg, st->f_blocks); - buffer_put_int64(&msg, st->f_bfree); - buffer_put_int64(&msg, st->f_bavail); - buffer_put_int64(&msg, st->f_files); - buffer_put_int64(&msg, st->f_ffree); - buffer_put_int64(&msg, st->f_favail); - buffer_put_int64(&msg, FSID_TO_ULONG(st->f_fsid)); - buffer_put_int64(&msg, flag); - buffer_put_int64(&msg, st->f_namemax); - send_msg(&msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED_REPLY)) != 0 || + (r = sshbuf_put_u32(msg, id)) != 0 || + (r = sshbuf_put_u64(msg, st->f_bsize)) != 0 || + (r = sshbuf_put_u64(msg, st->f_frsize)) != 0 || + (r = sshbuf_put_u64(msg, st->f_blocks)) != 0 || + (r = sshbuf_put_u64(msg, st->f_bfree)) != 0 || + (r = sshbuf_put_u64(msg, st->f_bavail)) != 0 || + (r = sshbuf_put_u64(msg, st->f_files)) != 0 || + (r = sshbuf_put_u64(msg, st->f_ffree)) != 0 || + (r = sshbuf_put_u64(msg, st->f_favail)) != 0 || + (r = sshbuf_put_u64(msg, FSID_TO_ULONG(st->f_fsid))) != 0 || + (r = sshbuf_put_u64(msg, flag)) != 0 || + (r = sshbuf_put_u64(msg, st->f_namemax)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(msg); + sshbuf_free(msg); } /* parse incoming */ @@ -582,60 +708,71 @@ send_statvfs(u_int32_t id, struct statvfs *st) static void process_init(void) { - Buffer msg; + struct sshbuf *msg; + int r; - version = get_int(); + if ((r = sshbuf_get_u32(iqueue, &version)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); verbose("received client version %u", version); - buffer_init(&msg); - buffer_put_char(&msg, SSH2_FXP_VERSION); - buffer_put_int(&msg, SSH2_FILEXFER_VERSION); - /* POSIX rename extension */ - buffer_put_cstring(&msg, "posix-rename@openssh.com"); - buffer_put_cstring(&msg, "1"); /* version */ - /* statvfs extension */ - buffer_put_cstring(&msg, "statvfs@openssh.com"); - buffer_put_cstring(&msg, "2"); /* version */ - /* fstatvfs extension */ - buffer_put_cstring(&msg, "fstatvfs@openssh.com"); - buffer_put_cstring(&msg, "2"); /* version */ - /* hardlink extension */ - buffer_put_cstring(&msg, "hardlink@openssh.com"); - buffer_put_cstring(&msg, "1"); /* version */ - send_msg(&msg); - buffer_free(&msg); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, SSH2_FXP_VERSION)) != 0 || + (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0 || + /* POSIX rename extension */ + (r = sshbuf_put_cstring(msg, "posix-rename@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, "1")) != 0 || /* version */ + /* statvfs extension */ + (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, "2")) != 0 || /* version */ + /* fstatvfs extension */ + (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, "2")) != 0 || /* version */ + /* hardlink extension */ + (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, "1")) != 0 || /* version */ + /* fsync extension */ + (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 || + (r = sshbuf_put_cstring(msg, "1")) != 0) /* version */ + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send_msg(msg); + sshbuf_free(msg); } static void -process_open(void) +process_open(u_int32_t id) { - u_int32_t id, pflags; - Attrib *a; + u_int32_t pflags; + Attrib a; char *name; - int handle, fd, flags, mode, status = SSH2_FX_FAILURE; - - id = get_int(); -#ifdef WIN32_FIXME + int r, handle, fd, flags, mode, status = SSH2_FX_FAILURE; + + #ifdef WIN32_FIXME name = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - name = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif /* WIN32_FIXME */ - pflags = get_int(); /* portable flags */ + if ((r = sshbuf_get_u32(iqueue, &pflags)) != 0 || /* portable flags */ + (r = decode_attrib(iqueue, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug3("request %u: open flags %d", id, pflags); - a = get_attrib(); flags = flags_from_portable(pflags); - mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; + mode = (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a.perm : 0666; logit("open \"%s\" flags %s mode 0%o", name, string_from_portable(pflags), mode); if (readonly && - ((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR)) + ((flags & O_ACCMODE) == O_WRONLY || + (flags & O_ACCMODE) == O_RDWR)) { + verbose("Refusing open request in read-only mode"); status = SSH2_FX_PERMISSION_DENIED; - else { - fd = open(name, flags, mode); + } else { + fd = open(name, flags, mode); if (fd < 0) { status = errno_to_portable(errno); } else { - handle = handle_new(HANDLE_FILE, name, fd, NULL); + handle = handle_new(HANDLE_FILE, name, fd, flags, NULL); if (handle < 0) { close(fd); } else { @@ -646,17 +783,17 @@ process_open(void) } if (status != SSH2_FX_OK) send_status(id, status); - xfree(name); + free(name); } static void -process_close(void) +process_close(u_int32_t id) { - u_int32_t id; - int handle, ret, status = SSH2_FX_FAILURE; + int r, handle, ret, status = SSH2_FX_FAILURE; + + if ((r = get_handle(iqueue, &handle)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - id = get_int(); - handle = get_handle(); debug3("request %u: close handle %u", id, handle); handle_log_close(handle, NULL); ret = handle_close(handle); @@ -665,17 +802,17 @@ process_close(void) } static void -process_read(void) +process_read(u_int32_t id) { - char buf[64*1024]; - u_int32_t id, len; - int handle, fd, ret, status = SSH2_FX_FAILURE; + u_char buf[64*1024]; + u_int32_t len; + int r, handle, fd, ret, status = SSH2_FX_FAILURE; u_int64_t off; - id = get_int(); - handle = get_handle(); - off = get_int64(); - len = get_int(); + if ((r = get_handle(iqueue, &handle)) != 0 || + (r = sshbuf_get_u64(iqueue, &off)) != 0 || + (r = sshbuf_get_u32(iqueue, &len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug("request %u: read \"%s\" (handle %d) off %llu len %d", id, handle_to_name(handle), handle, (unsigned long long)off, len); @@ -706,29 +843,27 @@ process_read(void) } static void -process_write(void) +process_write(u_int32_t id) { - u_int32_t id; u_int64_t off; - u_int len; - int handle, fd, ret, status; - char *data; + size_t len; + int r, handle, fd, ret, status; + u_char *data; - id = get_int(); - handle = get_handle(); - off = get_int64(); - data = get_string(&len); + if ((r = get_handle(iqueue, &handle)) != 0 || + (r = sshbuf_get_u64(iqueue, &off)) != 0 || + (r = sshbuf_get_string(iqueue, &data, &len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - debug("request %u: write \"%s\" (handle %d) off %llu len %d", + debug("request %u: write \"%s\" (handle %d) off %llu len %zu", id, handle_to_name(handle), handle, (unsigned long long)off, len); fd = handle_to_fd(handle); - + if (fd < 0) status = SSH2_FX_FAILURE; - else if (readonly) - status = SSH2_FX_PERMISSION_DENIED; else { - if (lseek(fd, off, SEEK_SET) < 0) { + if (!(handle_to_flags(handle) & O_APPEND) && + lseek(fd, off, SEEK_SET) < 0) { status = errno_to_portable(errno); error("process_write: seek failed"); } else { @@ -747,24 +882,21 @@ process_write(void) } } send_status(id, status); - xfree(data); + free(data); } static void -process_do_stat(int do_lstat) +process_do_stat(u_int32_t id, int do_lstat) { Attrib a; struct stat st; - u_int32_t id; char *name; - - #ifdef WIN32_FIXME + int r, status = SSH2_FX_FAILURE; + + #ifdef WIN32_FIXME char resolvedname[MAXPATHLEN]; #endif - - int ret, status = SSH2_FX_FAILURE; - - id = get_int(); + #ifdef WIN32_FIXME @@ -772,25 +904,27 @@ process_do_stat(int do_lstat) if (realpathWin32(name, resolvedname)) { - xfree(name); + free(name); name = strdup(resolvedname); } debug3("request %u: %sstat", id, do_lstat ? "l" : ""); verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); - ret = stat(name, &st); + r = stat(name, &st); #else - name = get_string(NULL); + + + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug3("request %u: %sstat", id, do_lstat ? "l" : ""); verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); - ret = do_lstat ? lstat(name, &st) : stat(name, &st); - - #endif /* WIN32_FIXME */ - - if (ret < 0) { + r = do_lstat ? lstat(name, &st) : stat(name, &st); + #endif /* WIN32_FIXME */ + if (r < 0) { status = errno_to_portable(errno); } else { stat_to_attrib(&st, &a); @@ -799,37 +933,36 @@ process_do_stat(int do_lstat) } if (status != SSH2_FX_OK) send_status(id, status); - xfree(name); + free(name); } static void -process_stat(void) +process_stat(u_int32_t id) { - process_do_stat(0); + process_do_stat(id, 0); } static void -process_lstat(void) +process_lstat(u_int32_t id) { - process_do_stat(1); + process_do_stat(id, 1); } static void -process_fstat(void) +process_fstat(u_int32_t id) { Attrib a; struct stat st; - u_int32_t id; - int fd, ret, handle, status = SSH2_FX_FAILURE; + int fd, r, handle, status = SSH2_FX_FAILURE; - id = get_int(); - handle = get_handle(); + if ((r = get_handle(iqueue, &handle)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug("request %u: fstat \"%s\" (handle %u)", id, handle_to_name(handle), handle); fd = handle_to_fd(handle); if (fd >= 0) { - ret = fstat(fd, &st); - if (ret < 0) { + r = fstat(fd, &st); + if (r < 0) { status = errno_to_portable(errno); } else { stat_to_attrib(&st, &a); @@ -854,128 +987,124 @@ attrib_to_tv(const Attrib *a) } static void -process_setstat(void) +process_setstat(u_int32_t id) { - Attrib *a; - u_int32_t id; + Attrib a; char *name; - int status = SSH2_FX_OK, ret; - - id = get_int(); + int r, status = SSH2_FX_OK; + #ifdef WIN32_FIXME name = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - name = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif - a = get_attrib(); + + if ((r = decode_attrib(iqueue, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug("request %u: setstat name \"%s\"", id, name); - if (readonly) { - status = SSH2_FX_PERMISSION_DENIED; - a->flags = 0; - } - if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if (a.flags & SSH2_FILEXFER_ATTR_SIZE) { logit("set \"%s\" size %llu", - name, (unsigned long long)a->size); + name, (unsigned long long)a.size); #ifndef WIN32_FIXME - ret = truncate(name, a->size); - if (ret == -1) + r = truncate(name, a.size); + if (r == -1) status = errno_to_portable(errno); #endif } - if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { - logit("set \"%s\" mode %04o", name, a->perm); - ret = chmod(name, a->perm & 07777); - if (ret == -1) + if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + logit("set \"%s\" mode %04o", name, a.perm); + r = chmod(name, a.perm & 07777); + if (r == -1) status = errno_to_portable(errno); } - if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { char buf[64]; - time_t t = a->mtime; + time_t t = a.mtime; strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", localtime(&t)); logit("set \"%s\" modtime %s", name, buf); - ret = utimes(name, attrib_to_tv(a)); - if (ret == -1) + r = utimes(name, attrib_to_tv(&a)); + if (r == -1) status = errno_to_portable(errno); } - if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { logit("set \"%s\" owner %lu group %lu", name, - (u_long)a->uid, (u_long)a->gid); + (u_long)a.uid, (u_long)a.gid); #ifndef WIN32_FIXME - ret = chown(name, a->uid, a->gid); - if (ret == -1) + r = chown(name, a.uid, a.gid); + if (r == -1) status = errno_to_portable(errno); #endif } send_status(id, status); - xfree(name); + free(name); } static void -process_fsetstat(void) +process_fsetstat(u_int32_t id) { - Attrib *a; - u_int32_t id; - int handle, fd, ret; + Attrib a; + int handle, fd, r; int status = SSH2_FX_OK; - id = get_int(); - handle = get_handle(); - a = get_attrib(); + if ((r = get_handle(iqueue, &handle)) != 0 || + (r = decode_attrib(iqueue, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug("request %u: fsetstat handle %d", id, handle); fd = handle_to_fd(handle); if (fd < 0) status = SSH2_FX_FAILURE; - else if (readonly) - status = SSH2_FX_PERMISSION_DENIED; else { char *name = handle_to_name(handle); - if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { + if (a.flags & SSH2_FILEXFER_ATTR_SIZE) { logit("set \"%s\" size %llu", - name, (unsigned long long)a->size); + name, (unsigned long long)a.size); #ifndef WIN32_FIXME - ret = ftruncate(fd, a->size); - if (ret == -1) + r = ftruncate(fd, a.size); + if (r == -1) status = errno_to_portable(errno); #endif } - if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { - logit("set \"%s\" mode %04o", name, a->perm); + if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { + logit("set \"%s\" mode %04o", name, a.perm); #ifdef HAVE_FCHMOD - ret = fchmod(fd, a->perm & 07777); + r = fchmod(fd, a.perm & 07777); #else - ret = chmod(name, a->perm & 07777); + r = chmod(name, a.perm & 07777); #endif - if (ret == -1) + if (r == -1) status = errno_to_portable(errno); } - if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { + if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) { char buf[64]; - time_t t = a->mtime; + time_t t = a.mtime; strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", localtime(&t)); logit("set \"%s\" modtime %s", name, buf); #ifdef HAVE_FUTIMES - ret = futimes(fd, attrib_to_tv(a)); + r = futimes(fd, attrib_to_tv(&a)); #else - ret = utimes(name, attrib_to_tv(a)); + r = utimes(name, attrib_to_tv(&a)); #endif - if (ret == -1) + if (r == -1) status = errno_to_portable(errno); } - if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { + if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) { logit("set \"%s\" owner %lu group %lu", name, - (u_long)a->uid, (u_long)a->gid); + (u_long)a.uid, (u_long)a.gid); #ifndef WIN32_FIXME #ifdef HAVE_FCHOWN - ret = fchown(fd, a->uid, a->gid); + r = fchown(fd, a.uid, a.gid); #else - ret = chown(name, a->uid, a->gid); + r = chown(name, a.uid, a.gid); #endif - if (ret == -1) + if (r == -1) status = errno_to_portable(errno); #endif } @@ -984,26 +1113,28 @@ process_fsetstat(void) } static void -process_opendir(void) +process_opendir(u_int32_t id) { DIR *dirp = NULL; char *path; - int handle, status = SSH2_FX_FAILURE; - u_int32_t id; - - id = get_int(); + int r, handle, status = SSH2_FX_FAILURE; + #ifdef WIN32_FIXME path = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - path = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif + + + debug3("request %u: opendir", id); logit("opendir \"%s\"", path); dirp = opendir(path); if (dirp == NULL) { status = errno_to_portable(errno); } else { - handle = handle_new(HANDLE_DIR, path, 0, dirp); + handle = handle_new(HANDLE_DIR, path, 0, 0, dirp); if (handle < 0) { closedir(dirp); } else { @@ -1014,20 +1145,20 @@ process_opendir(void) } if (status != SSH2_FX_OK) send_status(id, status); - xfree(path); + free(path); } static void -process_readdir(void) +process_readdir(u_int32_t id) { DIR *dirp; struct dirent *dp; char *path; - int handle; - u_int32_t id; + int r, handle; + + if ((r = get_handle(iqueue, &handle)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - id = get_int(); - handle = get_handle(); debug("request %u: readdir \"%s\" (handle %d)", id, handle_to_name(handle), handle); dirp = handle_to_dir(handle); @@ -1036,7 +1167,7 @@ process_readdir(void) send_status(id, SSH2_FX_FAILURE); } else { struct stat st; - char pathname[MAXPATHLEN]; + char pathname[PATH_MAX]; Stat *stats; int nstats = 10, count = 0, i; @@ -1044,7 +1175,7 @@ process_readdir(void) while ((dp = readdir(dirp)) != NULL) { if (count >= nstats) { nstats *= 2; - stats = xrealloc(stats, nstats, sizeof(Stat)); + stats = xreallocarray(stats, nstats, sizeof(Stat)); } /* XXX OVERFLOW ? */ snprintf(pathname, sizeof pathname, "%s%s%s", path, @@ -1052,7 +1183,6 @@ process_readdir(void) if (lstat(pathname, &st) < 0) continue; stat_to_attrib(&st, &(stats[count].attrib)); - #ifdef WIN32_FIXME { /* @@ -1071,7 +1201,6 @@ process_readdir(void) stats[count].name = xstrdup(dp->d_name); stats[count].long_name = ls_file(dp->d_name, &st, 0, 0); #endif - count++; /* send up to 100 entries in one message */ /* XXX check packet size instead */ @@ -1081,114 +1210,104 @@ process_readdir(void) if (count > 0) { send_names(id, count, stats); for (i = 0; i < count; i++) { - xfree(stats[i].name); - xfree(stats[i].long_name); + free(stats[i].name); + free(stats[i].long_name); } } else { send_status(id, SSH2_FX_EOF); } - xfree(stats); + free(stats); } } static void -process_remove(void) +process_remove(u_int32_t id) { char *name; - u_int32_t id; - int status = SSH2_FX_FAILURE; - int ret; - - id = get_int(); + int r, status = SSH2_FX_FAILURE; #ifdef WIN32_FIXME name = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - name = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + #endif + debug3("request %u: remove", id); logit("remove name \"%s\"", name); - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else { - ret = unlink(name); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = unlink(name); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; send_status(id, status); - xfree(name); + free(name); } static void -process_mkdir(void) +process_mkdir(u_int32_t id) { - Attrib *a; - u_int32_t id; + Attrib a; char *name; - int ret, mode, status = SSH2_FX_FAILURE; - - id = get_int(); -#ifdef WIN32_FIXME + int r, mode, status = SSH2_FX_FAILURE; + + #ifdef WIN32_FIXME name = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - name = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif - a = get_attrib(); - mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? - a->perm & 07777 : 0777; + + if ((r = decode_attrib(iqueue, &a)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + + mode = (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? + a.perm & 07777 : 0777; debug3("request %u: mkdir", id); logit("mkdir name \"%s\" mode 0%o", name, mode); - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else { - ret = mkdir(name, mode); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = mkdir(name, mode); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; send_status(id, status); - xfree(name); + free(name); } static void -process_rmdir(void) +process_rmdir(u_int32_t id) { - u_int32_t id; char *name; - int ret, status; - - id = get_int(); -#ifdef WIN32_FIXME + int r, status; + + #ifdef WIN32_FIXME name = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - name = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif + + debug3("request %u: rmdir", id); logit("rmdir name \"%s\"", name); - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else { - ret = rmdir(name); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = rmdir(name); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; send_status(id, status); - xfree(name); + free(name); } static void -process_realpath(void) +process_realpath(u_int32_t id) { - char resolvedname[MAXPATHLEN]; - u_int32_t id; + char resolvedname[PATH_MAX]; char *path; - - id = get_int(); - + int r; #ifdef WIN32_FIXME path = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - path = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif + + if (path[0] == '\0') { - xfree(path); + free(path); path = xstrdup("."); } debug3("request %u: realpath", id); @@ -1201,33 +1320,31 @@ process_realpath(void) s.name = s.long_name = resolvedname; send_names(id, 1, &s); } - xfree(path); + free(path); } static void -process_rename(void) +process_rename(u_int32_t id) { - u_int32_t id; char *oldpath, *newpath; - int status; + int r, status; struct stat sb; - - id = get_int(); - -#ifdef WIN32_FIXME + + #ifdef WIN32_FIXME oldpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); newpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - oldpath = get_string(NULL); - newpath = get_string(NULL); +if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 || + (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + #endif + debug3("request %u: rename", id); logit("rename old \"%s\" new \"%s\"", oldpath, newpath); status = SSH2_FX_FAILURE; - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else if (lstat(oldpath, &sb) == -1) + if (lstat(oldpath, &sb) == -1) status = errno_to_portable(errno); #ifndef WIN32_FIXME else if (S_ISREG(sb.st_mode)) { @@ -1263,8 +1380,8 @@ process_rename(void) unlink(newpath); } else status = SSH2_FX_OK; - } -#endif /* !WIN32_FIXME */ + } +#endif /* !WIN32_FIXME */ else if (stat(newpath, &sb) == -1) { if (rename(oldpath, newpath) == -1) status = errno_to_portable(errno); @@ -1272,44 +1389,45 @@ process_rename(void) status = SSH2_FX_OK; } send_status(id, status); - xfree(oldpath); - xfree(newpath); + free(oldpath); + free(newpath); } static void -process_readlink(void) +process_readlink(u_int32_t id) { - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME /* * Win32 code. */ - u_int32_t id; + //u_int32_t id; char *request; - id = get_int(); - + //id = get_int(); + #ifndef WIN32_FIXME + // PRAGMA:TODO request = get_string(NULL); send_status(id, SSH2_FX_OP_UNSUPPORTED); - xfree(request); + free(request); + #endif #else /* * Original OpenSSH code. */ - - u_int32_t id; - int len; - char buf[MAXPATHLEN]; + int r, len; + char buf[PATH_MAX]; char *path; - id = get_int(); - path = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug3("request %u: readlink", id); verbose("readlink \"%s\"", path); if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) @@ -1322,84 +1440,80 @@ process_readlink(void) s.name = s.long_name = buf; send_names(id, 1, &s); } - xfree(path); - #endif /* WIN32_FIXME */ + free(path); + #endif /* WIN32_FIXME */ } static void -process_symlink(void) +process_symlink(u_int32_t id) { - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME /* * Win32 code. */ - u_int32_t id; + //u_int32_t id; char *request; - id = get_int(); - + //id = get_int(); + #ifndef WIN32_FIXME + // PRAGMA:TODO request = get_string(NULL); send_status(id, SSH2_FX_OP_UNSUPPORTED); - xfree(request); + free(request); + #endif #else /* * Original OpenSSH code. */ - - u_int32_t id; char *oldpath, *newpath; - int ret, status; + int r, status; + + if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 || + (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - id = get_int(); - oldpath = get_string(NULL); - newpath = get_string(NULL); debug3("request %u: symlink", id); logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); /* this will fail if 'newpath' exists */ - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else { - ret = symlink(oldpath, newpath); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = symlink(oldpath, newpath); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; send_status(id, status); - xfree(oldpath); - xfree(newpath); - #endif + free(oldpath); + free(newpath); + #endif } static void process_extended_posix_rename(u_int32_t id) { char *oldpath, *newpath; - int ret, status; - -#ifdef WIN32_FIXME + int r, status; + + #ifdef WIN32_FIXME oldpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); newpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - oldpath = get_string(NULL); - newpath = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 || + (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif + + debug3("request %u: posix-rename", id); logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath); - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; - else { - ret = rename(oldpath, newpath); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = rename(oldpath, newpath); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; send_status(id, status); - xfree(oldpath); - xfree(newpath); + free(oldpath); + free(newpath); } /* @@ -1530,44 +1644,57 @@ static void process_extended_statvfs(u_int32_t id) { char *path; + + #ifdef WIN32_FIXME struct stat st; - -#ifdef WIN32_FIXME + #else + struct statvfs st; + #endif + + int r; + + #ifdef WIN32_FIXME path = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - path = get_string(NULL); + if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif - debug3("request %u: statfs", id); - logit("statfs \"%s\"", path); + + debug3("request %u: statvfs", id); + logit("statvfs \"%s\"", path); if (statvfs(path, &st) != 0) send_status(id, errno_to_portable(errno)); else send_statvfs(id, &st); - xfree(path); + free(path); } static void process_extended_fstatvfs(u_int32_t id) { - int handle, fd; + int r, handle, fd; + #ifdef WIN32_FIXME struct stat st; + #else + struct statvfs st; + #endif - handle = get_handle(); + if ((r = get_handle(iqueue, &handle)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug("request %u: fstatvfs \"%s\" (handle %u)", id, handle_to_name(handle), handle); if ((fd = handle_to_fd(handle)) < 0) { send_status(id, SSH2_FX_FAILURE); return; } - - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME if (statvfs(handle_to_name(handle), &st) != 0) #else if (fstatvfs(fd, &st) != 0) #endif - + send_status(id, errno_to_portable(errno)); else send_statvfs(id, &st); @@ -1577,50 +1704,73 @@ static void process_extended_hardlink(u_int32_t id) { char *oldpath, *newpath; - int ret, status; - -#ifdef WIN32_FIXME + int r, status; + + #ifdef WIN32_FIXME oldpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); newpath = buffer_get_string_local8_from_utf8(&iqueue, NULL); #else - oldpath = get_string(NULL); - newpath = get_string(NULL); +if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 || + (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); #endif + + debug3("request %u: hardlink", id); logit("hardlink old \"%s\" new \"%s\"", oldpath, newpath); - if (readonly) - status = SSH2_FX_PERMISSION_DENIED; #ifndef WIN32_FIXME - else { - ret = link(oldpath, newpath); - status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; - } + r = link(oldpath, newpath); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; #endif send_status(id, status); - xfree(oldpath); - xfree(newpath); + free(oldpath); + free(newpath); } static void -process_extended(void) +process_extended_fsync(u_int32_t id) { - u_int32_t id; - char *request; + int handle, fd, r, status = SSH2_FX_OP_UNSUPPORTED; - id = get_int(); - request = get_string(NULL); - if (strcmp(request, "posix-rename@openssh.com") == 0) - process_extended_posix_rename(id); - else if (strcmp(request, "statvfs@openssh.com") == 0) - process_extended_statvfs(id); - else if (strcmp(request, "fstatvfs@openssh.com") == 0) - process_extended_fstatvfs(id); - else if (strcmp(request, "hardlink@openssh.com") == 0) - process_extended_hardlink(id); - else + if ((r = get_handle(iqueue, &handle)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug3("request %u: fsync (handle %u)", id, handle); + verbose("fsync \"%s\"", handle_to_name(handle)); + if ((fd = handle_to_fd(handle)) < 0) + status = SSH2_FX_NO_SUCH_FILE; +#ifndef WIN32_FIXME +// PRAGMA:TODO + else if (handle_is_ok(handle, HANDLE_FILE)) { + r = fsync(fd); + status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK; + } +#endif + send_status(id, status); +} + +static void +process_extended(u_int32_t id) +{ + char *request; + int i, r; + + if ((r = sshbuf_get_cstring(iqueue, &request, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + for (i = 0; extended_handlers[i].handler != NULL; i++) { + if (strcmp(request, extended_handlers[i].ext_name) == 0) { + if (!request_permitted(&extended_handlers[i])) + send_status(id, SSH2_FX_PERMISSION_DENIED); + else + extended_handlers[i].handler(id); + break; + } + } + if (extended_handlers[i].handler == NULL) { + error("Unknown extended request \"%.100s\"", request); send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ - xfree(request); + } + free(request); } /* stolen from ssh-agent */ @@ -1631,13 +1781,15 @@ process(void) u_int msg_len; u_int buf_len; u_int consumed; - u_int type; - u_char *cp; + u_char type; + const u_char *cp; + int i, r; + u_int32_t id; - buf_len = buffer_len(&iqueue); + buf_len = sshbuf_len(iqueue); if (buf_len < 5) return; /* Incomplete message. */ - cp = buffer_ptr(&iqueue); + cp = sshbuf_ptr(iqueue); msg_len = get_u32(cp); if (msg_len > SFTP_MAX_MSG_LENGTH) { error("bad message from %s local user %s", @@ -1646,86 +1798,56 @@ process(void) } if (buf_len < msg_len + 4) return; - buffer_consume(&iqueue, 4); + if ((r = sshbuf_consume(iqueue, 4)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); buf_len -= 4; - type = buffer_get_char(&iqueue); + if ((r = sshbuf_get_u8(iqueue, &type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + switch (type) { case SSH2_FXP_INIT: process_init(); - break; - case SSH2_FXP_OPEN: - process_open(); - break; - case SSH2_FXP_CLOSE: - process_close(); - break; - case SSH2_FXP_READ: - process_read(); - break; - case SSH2_FXP_WRITE: - process_write(); - break; - case SSH2_FXP_LSTAT: - process_lstat(); - break; - case SSH2_FXP_FSTAT: - process_fstat(); - break; - case SSH2_FXP_SETSTAT: - process_setstat(); - break; - case SSH2_FXP_FSETSTAT: - process_fsetstat(); - break; - case SSH2_FXP_OPENDIR: - process_opendir(); - break; - case SSH2_FXP_READDIR: - process_readdir(); - break; - case SSH2_FXP_REMOVE: - process_remove(); - break; - case SSH2_FXP_MKDIR: - process_mkdir(); - break; - case SSH2_FXP_RMDIR: - process_rmdir(); - break; - case SSH2_FXP_REALPATH: - process_realpath(); - break; - case SSH2_FXP_STAT: - process_stat(); - break; - case SSH2_FXP_RENAME: - process_rename(); - break; - case SSH2_FXP_READLINK: - process_readlink(); - break; - case SSH2_FXP_SYMLINK: - process_symlink(); + init_done = 1; break; case SSH2_FXP_EXTENDED: - process_extended(); + if (!init_done) + fatal("Received extended request before init"); + if ((r = sshbuf_get_u32(iqueue, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + process_extended(id); break; default: - error("Unknown message %d", type); - break; + if (!init_done) + fatal("Received %u request before init", type); + if ((r = sshbuf_get_u32(iqueue, &id)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + for (i = 0; handlers[i].handler != NULL; i++) { + if (type == handlers[i].type) { + if (!request_permitted(&handlers[i])) { + send_status(id, + SSH2_FX_PERMISSION_DENIED); + } else { + handlers[i].handler(id); + } + break; + } + } + if (handlers[i].handler == NULL) + error("Unknown message %u", type); } /* discard the remaining bytes from the current packet */ - if (buf_len < buffer_len(&iqueue)) { + if (buf_len < sshbuf_len(iqueue)) { error("iqueue grew unexpectedly"); sftp_server_cleanup_exit(255); } - consumed = buf_len - buffer_len(&iqueue); + consumed = buf_len - sshbuf_len(iqueue); if (msg_len < consumed) { - error("msg_len %d < consumed %d", msg_len, consumed); + error("msg_len %u < consumed %u", msg_len, consumed); sftp_server_cleanup_exit(255); } - if (msg_len > consumed) - buffer_consume(&iqueue, msg_len - consumed); + if (msg_len > consumed && + (r = sshbuf_consume(iqueue, msg_len - consumed)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } /* Cleanup handler that logs active handles upon normal exit */ @@ -1746,8 +1868,11 @@ sftp_server_usage(void) extern char *__progname; fprintf(stderr, - "usage: %s [-ehR] [-f log_facility] [-l log_level] [-u umask]\n", - __progname); + "usage: %s [-ehR] [-d start_directory] [-f log_facility] " + "[-l log_level]\n\t[-P blacklisted_requests] " + "[-p whitelisted_requests] [-u umask]\n" + " %s -Q protocol_feature\n", + __progname, __progname); exit(1); } @@ -1755,16 +1880,21 @@ int sftp_server_main(int argc, char **argv, struct passwd *user_pw) { fd_set *rset, *wset; - int in, out, max, ch, skipargs = 0, log_stderr = 0; + int i, r, in, out, max, ch, skipargs = 0, log_stderr = 0; ssize_t len, olen, set_size; SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; - char *cp, buf[32768]; + + #ifdef WIN32_FIXME + char *cp, *homedir = NULL, buf[32768]; + #else + char *cp, *homedir = NULL, buf[4*4096]; + #endif + long mask; extern char *optarg; extern char *__progname; - - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME /* * Initialize Win32 log. @@ -1804,10 +1934,23 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) __progname = ssh_get_progname(argv[0]); log_init(__progname, log_level, log_facility, log_stderr); - #endif + pw = pwcopy(user_pw); +#endif - while (!skipargs && (ch = getopt(argc, argv, "f:l:u:cehR")) != -1) { + while (!skipargs && (ch = getopt(argc, argv, + "d:f:l:P:p:Q:u:cehR")) != -1) { switch (ch) { + case 'Q': + if (strcasecmp(optarg, "requests") != 0) { + fprintf(stderr, "Invalid query type\n"); + exit(1); + } + for (i = 0; handlers[i].handler != NULL; i++) + printf("%s\n", handlers[i].name); + for (i = 0; extended_handlers[i].handler != NULL; i++) + printf("%s\n", extended_handlers[i].name); + exit(0); + break; case 'R': readonly = 1; break; @@ -1831,6 +1974,22 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) if (log_facility == SYSLOG_FACILITY_NOT_SET) error("Invalid log facility \"%s\"", optarg); break; + case 'd': + cp = tilde_expand_filename(optarg, user_pw->pw_uid); + homedir = percent_expand(cp, "d", user_pw->pw_dir, + "u", user_pw->pw_name, (char *)NULL); + free(cp); + break; + case 'p': + if (request_whitelist != NULL) + fatal("Permitted requests already set"); + request_whitelist = xstrdup(optarg); + break; + case 'P': + if (request_blacklist != NULL) + fatal("Refused requests already set"); + request_blacklist = xstrdup(optarg); + break; case 'u': errno = 0; mask = strtol(optarg, &cp, 8); @@ -1844,11 +2003,24 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) sftp_server_usage(); } } - -#ifndef WIN32_FIXME + + #ifndef WIN32_FIXME log_init(__progname, log_level, log_facility, log_stderr); #endif + + +#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) + /* + * On Linux, we should try to avoid making /proc/self/{mem,maps} + * available to the user so that sftp access doesn't automatically + * imply arbitrary code execution access that will break + * restricted configurations. + */ + if (prctl(PR_SET_DUMPABLE, 0) != 0) + fatal("unable to make the process undumpable"); +#endif /* defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) */ + if ((cp = getenv("SSH_CONNECTION")) != NULL) { client_addr = xstrdup(cp); if ((cp = strchr(client_addr, ' ')) == NULL) { @@ -1860,8 +2032,6 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) } else client_addr = xstrdup("UNKNOWN"); - pw = pwcopy(user_pw); - logit("session opened for local user %s from [%s]", pw->pw_name, client_addr); @@ -1886,20 +2056,29 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) if (out > max) max = out; - buffer_init(&iqueue); - buffer_init(&oqueue); - + if ((iqueue = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((oqueue = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); #ifdef WIN32_FIXME rset = (fd_set *)xmalloc(sizeof(fd_set)); wset = (fd_set *)xmalloc(sizeof(fd_set)); #else set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); - rset = (fd_set *)xmalloc(set_size); - wset = (fd_set *)xmalloc(set_size); + rset = xmalloc(set_size); + wset = xmalloc(set_size); #endif + + if (homedir != NULL) { + if (chdir(homedir) != 0) { + error("chdir to \"%s\" failed: %s", homedir, + strerror(errno)); + } + } + for (;;) { -#ifdef WIN32_FIXME + #ifdef WIN32_FIXME FD_ZERO(rset); FD_ZERO(wset); @@ -1907,6 +2086,7 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) #else memset(rset, 0, set_size); memset(wset, 0, set_size); + #endif /* @@ -1914,10 +2094,13 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) * the worst-case length packet it can generate, * otherwise apply backpressure by stopping reads. */ - if (buffer_check_alloc(&iqueue, sizeof(buf)) && - buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) + if ((r = sshbuf_check_reserve(iqueue, sizeof(buf))) == 0 && + (r = sshbuf_check_reserve(oqueue, + SFTP_MAX_MSG_LENGTH)) == 0) FD_SET(in, rset); - + else if (r != SSH_ERR_NO_BUFFER_SPACE) + fatal("%s: sshbuf_check_reserve failed: %s", + __func__, ssh_err(r)); #ifdef WIN32_FIXME @@ -1996,15 +2179,18 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) } } #else /* WIN32_FIXME */ - olen = buffer_len(&oqueue); + + olen = sshbuf_len(oqueue); if (olen > 0) FD_SET(out, wset); + if (select(max+1, rset, wset, NULL, NULL) < 0) { if (errno == EINTR) continue; error("select: %s", strerror(errno)); sftp_server_cleanup_exit(2); } + /* copy stdin to iqueue */ if (FD_ISSET(in, rset)) { len = read(in, buf, sizeof buf); @@ -2014,27 +2200,34 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw) } else if (len < 0) { error("read: %s", strerror(errno)); sftp_server_cleanup_exit(1); - } else { - buffer_append(&iqueue, buf, len); + } else if ((r = sshbuf_put(iqueue, buf, len)) != 0) { + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); } } /* send oqueue to stdout */ if (FD_ISSET(out, wset)) { - len = write(out, buffer_ptr(&oqueue), olen); + len = write(out, sshbuf_ptr(oqueue), olen); if (len < 0) { error("write: %s", strerror(errno)); sftp_server_cleanup_exit(1); - } else { - buffer_consume(&oqueue, len); + } else if ((r = sshbuf_consume(oqueue, len)) != 0) { + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); } } + /* * Process requests from client if we can fit the results * into the output buffer, otherwise stop processing input * and let the output queue drain. */ - if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) + r = sshbuf_check_reserve(oqueue, SFTP_MAX_MSG_LENGTH); + if (r == 0) process(); + else if (r != SSH_ERR_NO_BUFFER_SPACE) + fatal("%s: sshbuf_check_reserve: %s", + __func__, ssh_err(r)); } #endif /* else WIN32 */ } diff --git a/sftp.c b/sftp.c index 1d5b67b..c785bcc 100644 --- a/sftp.c +++ b/sftp.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp.c,v 1.132 2010/12/04 00:18:01 djm Exp $ */ +/* $OpenBSD: sftp.c,v 1.171 2015/08/20 22:32:42 deraadt Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller * @@ -17,6 +17,7 @@ #include "includes.h" +#include /* MIN MAX */ #include #include #ifdef HAVE_SYS_STAT_H @@ -38,11 +39,15 @@ #ifdef HAVE_LIBGEN_H #include #endif +#ifdef HAVE_LOCALE_H +# include +#endif #ifdef USE_LIBEDIT #include #else typedef void EditLine; #endif +#include #include #include #include @@ -54,17 +59,14 @@ typedef void EditLine; # include #endif -#ifdef HAVE_LIBUTIL_H -# include -#endif - #include "xmalloc.h" #include "log.h" #include "pathnames.h" #include "misc.h" #include "sftp.h" -#include "buffer.h" +#include "ssherr.h" +#include "sshbuf.h" #include "sftp-common.h" #include "sftp-client.h" @@ -90,15 +92,24 @@ int batchmode = 0; /* PID of ssh transport process */ static pid_t sshpid = -1; +/* Suppress diagnositic messages */ +int quiet = 0; + /* This is set to 0 if the progressmeter is not desired. */ int showprogress = 1; /* When this option is set, we always recursively download/upload directories */ int global_rflag = 0; +/* When this option is set, we resume download or upload if possible */ +int global_aflag = 0; + /* When this option is set, the file transfers will always preserve times */ int global_pflag = 0; +/* When this option is set, transfers will have fsync() called on each file */ +int global_fflag = 0; + /* SIGINT received during command processing */ volatile sig_atomic_t interrupted = 0; @@ -134,31 +145,35 @@ extern char *__progname; #define SORT_FLAGS (LS_NAME_SORT|LS_TIME_SORT|LS_SIZE_SORT) /* Commands for interactive mode */ -#define I_CHDIR 1 -#define I_CHGRP 2 -#define I_CHMOD 3 -#define I_CHOWN 4 -#define I_DF 24 -#define I_GET 5 -#define I_HELP 6 -#define I_LCHDIR 7 -#define I_LINK 25 -#define I_LLS 8 -#define I_LMKDIR 9 -#define I_LPWD 10 -#define I_LS 11 -#define I_LUMASK 12 -#define I_MKDIR 13 -#define I_PUT 14 -#define I_PWD 15 -#define I_QUIT 16 -#define I_RENAME 17 -#define I_RM 18 -#define I_RMDIR 19 -#define I_SHELL 20 -#define I_SYMLINK 21 -#define I_VERSION 22 -#define I_PROGRESS 23 +enum sftp_command { + I_CHDIR = 1, + I_CHGRP, + I_CHMOD, + I_CHOWN, + I_DF, + I_GET, + I_HELP, + I_LCHDIR, + I_LINK, + I_LLS, + I_LMKDIR, + I_LPWD, + I_LS, + I_LUMASK, + I_MKDIR, + I_PUT, + I_PWD, + I_QUIT, + I_REGET, + I_RENAME, + I_REPUT, + I_RM, + I_RMDIR, + I_SHELL, + I_SYMLINK, + I_VERSION, + I_PROGRESS, +}; struct CMD { const char *c; @@ -198,7 +213,9 @@ static const struct CMD cmds[] = { { "put", I_PUT, LOCAL }, { "pwd", I_PWD, REMOTE }, { "quit", I_QUIT, NOARGS }, + { "reget", I_REGET, REMOTE }, { "rename", I_RENAME, REMOTE }, + { "reput", I_REPUT, LOCAL }, { "rm", I_RM, REMOTE }, { "rmdir", I_RMDIR, REMOTE }, { "symlink", I_SYMLINK, REMOTE }, @@ -229,7 +246,7 @@ cmd_interrupt(int signo) const char msg[] = "\rInterrupt \n"; int olderrno = errno; - write(STDERR_FILENO, msg, sizeof(msg) - 1); + (void)write(STDERR_FILENO, msg, sizeof(msg) - 1); interrupted = 1; errno = olderrno; } @@ -246,7 +263,9 @@ help(void) "df [-hi] [path] Display statistics for current directory or\n" " filesystem containing 'path'\n" "exit Quit sftp\n" - "get [-Ppr] remote [local] Download file\n" + "get [-afPpRr] remote [local] Download file\n" + "reget [-fPpRr] remote [local] Resume download file\n" + "reput [-fPpRr] [local] remote Resume upload file\n" "help Display this help text\n" "lcd path Change local directory to 'path'\n" "lls [ls-options [path]] Display local directory listing\n" @@ -257,7 +276,7 @@ help(void) "lumask umask Set local umask to 'umask'\n" "mkdir path Create remote directory\n" "progress Toggle display of progress meter\n" - "put [-Ppr] local [remote] Upload file\n" + "put [-afPpRr] local [remote] Upload file\n" "pwd Display remote working directory\n" "quit Quit sftp\n" "rename oldpath newpath Rename remote file\n" @@ -273,7 +292,7 @@ help(void) static void local_do_shell(const char *args) { - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME /* * Not implemented on native Win32. @@ -286,7 +305,6 @@ local_do_shell(const char *args) /* * Original OpenSSH code. */ - int status; char *shell; pid_t pid; @@ -320,8 +338,7 @@ local_do_shell(const char *args) error("Shell exited abnormally"); else if (WEXITSTATUS(status)) error("Shell exited with status %d", WEXITSTATUS(status)); - - #endif + #endif } static void @@ -336,7 +353,7 @@ local_do_ls(const char *args) /* XXX: quoting - rip quoting code from ftp? */ snprintf(buf, len, _PATH_LS " %s", args); local_do_shell(buf); - xfree(buf); + free(buf); } } @@ -367,15 +384,15 @@ make_absolute(char *p, char *pwd) /* Derelativise */ if (p && p[0] != '/') { abs_str = path_append(pwd, p); - xfree(p); + free(p); return(abs_str); } else return(p); } static int -parse_getput_flags(const char *cmd, char **argv, int argc, int *pflag, - int *rflag) +parse_getput_flags(const char *cmd, char **argv, int argc, + int *aflag, int *fflag, int *pflag, int *rflag) { extern int opterr, optind, optopt, optreset; int ch; @@ -383,9 +400,15 @@ parse_getput_flags(const char *cmd, char **argv, int argc, int *pflag, optind = optreset = 1; opterr = 0; - *rflag = *pflag = 0; - while ((ch = getopt(argc, argv, "PpRr")) != -1) { + *aflag = *fflag = *rflag = *pflag = 0; + while ((ch = getopt(argc, argv, "afPpRr")) != -1) { switch (ch) { + case 'a': + *aflag = 1; + break; + case 'f': + *fflag = 1; + break; case 'p': case 'P': *pflag = 1; @@ -427,6 +450,30 @@ parse_link_flags(const char *cmd, char **argv, int argc, int *sflag) return optind; } +static int +parse_rename_flags(const char *cmd, char **argv, int argc, int *lflag) +{ + extern int opterr, optind, optopt, optreset; + int ch; + + optind = optreset = 1; + opterr = 0; + + *lflag = 0; + while ((ch = getopt(argc, argv, "l")) != -1) { + switch (ch) { + case 'l': + *lflag = 1; + break; + default: + error("%s: Invalid flag -%c", cmd, optopt); + return -1; + } + } + + return optind; +} + static int parse_ls_flags(char **argv, int argc, int *lflag) { @@ -507,6 +554,26 @@ parse_df_flags(const char *cmd, char **argv, int argc, int *hflag, int *iflag) return optind; } +static int +parse_no_flags(const char *cmd, char **argv, int argc) +{ + extern int opterr, optind, optopt, optreset; + int ch; + + optind = optreset = 1; + opterr = 0; + + while ((ch = getopt(argc, argv, "")) != -1) { + switch (ch) { + default: + error("%s: Invalid flag -%c", cmd, optopt); + return -1; + } + } + + return optind; +} + static int is_dir(char *path) { @@ -543,21 +610,25 @@ pathname_is_dir(char *pathname) static int process_get(struct sftp_conn *conn, char *src, char *dst, char *pwd, - int pflag, int rflag) + int pflag, int rflag, int resume, int fflag) { char *abs_src = NULL; char *abs_dst = NULL; glob_t g; char *filename, *tmp=NULL; - int i, err = 0; + int i, r, err = 0; abs_src = xstrdup(src); abs_src = make_absolute(abs_src, pwd); memset(&g, 0, sizeof(g)); debug3("Looking up %s", abs_src); - if (remote_glob(conn, abs_src, GLOB_MARK, NULL, &g)) { - error("File \"%s\" not found.", abs_src); + if ((r = remote_glob(conn, abs_src, GLOB_MARK, NULL, &g)) != 0) { + if (r == GLOB_NOSPACE) { + error("Too many matches for \"%s\".", abs_src); + } else { + error("File \"%s\" not found.", abs_src); + } err = -1; goto out; } @@ -577,7 +648,7 @@ process_get(struct sftp_conn *conn, char *src, char *dst, char *pwd, tmp = xstrdup(g.gl_pathv[i]); if ((filename = basename(tmp)) == NULL) { error("basename %s: %s", tmp, strerror(errno)); - xfree(tmp); + free(tmp); err = -1; goto out; } @@ -593,31 +664,37 @@ process_get(struct sftp_conn *conn, char *src, char *dst, char *pwd, } else { abs_dst = xstrdup(filename); } - xfree(tmp); + free(tmp); - printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); + resume |= global_aflag; + if (!quiet && resume) + printf("Resuming %s to %s\n", g.gl_pathv[i], abs_dst); + else if (!quiet && !resume) + printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); if (pathname_is_dir(g.gl_pathv[i]) && (rflag || global_rflag)) { - if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL, - pflag || global_pflag, 1) == -1) + if (download_dir(conn, g.gl_pathv[i], abs_dst, NULL, + pflag || global_pflag, 1, resume, + fflag || global_fflag) == -1) err = -1; } else { if (do_download(conn, g.gl_pathv[i], abs_dst, NULL, - pflag || global_pflag) == -1) + pflag || global_pflag, resume, + fflag || global_fflag) == -1) err = -1; } - xfree(abs_dst); + free(abs_dst); abs_dst = NULL; } out: - xfree(abs_src); + free(abs_src); globfree(&g); return(err); } static int process_put(struct sftp_conn *conn, char *src, char *dst, char *pwd, - int pflag, int rflag) + int pflag, int rflag, int resume, int fflag) { char *tmp_dst = NULL; char *abs_dst = NULL; @@ -658,11 +735,11 @@ process_put(struct sftp_conn *conn, char *src, char *dst, char *pwd, error("stat %s: %s", g.gl_pathv[i], strerror(errno)); continue; } - + tmp = xstrdup(g.gl_pathv[i]); if ((filename = basename(tmp)) == NULL) { error("basename %s: %s", tmp, strerror(errno)); - xfree(tmp); + free(tmp); err = -1; goto out; } @@ -678,25 +755,30 @@ process_put(struct sftp_conn *conn, char *src, char *dst, char *pwd, } else { abs_dst = make_absolute(xstrdup(filename), pwd); } - xfree(tmp); + free(tmp); - printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst); + resume |= global_aflag; + if (!quiet && resume) + printf("Resuming upload of %s to %s\n", g.gl_pathv[i], + abs_dst); + else if (!quiet && !resume) + printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst); if (pathname_is_dir(g.gl_pathv[i]) && (rflag || global_rflag)) { if (upload_dir(conn, g.gl_pathv[i], abs_dst, - pflag || global_pflag, 1) == -1) + pflag || global_pflag, 1, resume, + fflag || global_fflag) == -1) err = -1; } else { if (do_upload(conn, g.gl_pathv[i], abs_dst, - pflag || global_pflag) == -1) + pflag || global_pflag, resume, + fflag || global_fflag) == -1) err = -1; } } out: - if (abs_dst) - xfree(abs_dst); - if (tmp_dst) - xfree(tmp_dst); + free(abs_dst); + free(tmp_dst); globfree(&g); return(err); } @@ -744,13 +826,14 @@ do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag) /* Add any subpath that also needs to be counted */ tmp = path_strip(path, strip_path); m += strlen(tmp); - xfree(tmp); - + free(tmp); #ifndef WIN32_FIXME if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1) width = ws.ws_col; #endif + + columns = width / (m + 2); columns = MAX(columns, 1); colspace = width / columns; @@ -772,7 +855,7 @@ do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag) tmp = path_append(path, d[n]->filename); fname = path_strip(tmp, strip_path); - xfree(tmp); + free(tmp); if (lflag & LS_LONG_VIEW) { if (lflag & (LS_NUMERIC_VIEW|LS_SI_UNITS)) { @@ -784,7 +867,7 @@ do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag) lname = ls_file(fname, &sb, 1, (lflag & LS_SI_UNITS)); printf("%s\n", lname); - xfree(lname); + free(lname); } else printf("%s\n", d[n]->longname); } else { @@ -796,7 +879,7 @@ do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag) c++; } - xfree(fname); + free(fname); } if (!(lflag & LS_LONG_VIEW) && (c != 1)) @@ -811,21 +894,25 @@ static int do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path, int lflag) { - Attrib *a = NULL; char *fname, *lname; glob_t g; - int err; + int err, r; struct winsize ws; u_int i, c = 1, colspace = 0, columns = 1, m = 0, width = 80; memset(&g, 0, sizeof(g)); - if (remote_glob(conn, path, - GLOB_MARK|GLOB_NOCHECK|GLOB_BRACE|GLOB_KEEPSTAT, NULL, &g) || + if ((r = remote_glob(conn, path, + GLOB_MARK|GLOB_NOCHECK|GLOB_BRACE|GLOB_KEEPSTAT|GLOB_NOSORT, + NULL, &g)) != 0 || (g.gl_pathc && !g.gl_matchc)) { if (g.gl_pathc) globfree(&g); - error("Can't ls: \"%s\" not found", path); + if (r == GLOB_NOSPACE) { + error("Can't ls: Too many matches for \"%s\"", path); + } else { + error("Can't ls: \"%s\" not found", path); + } return -1; } @@ -842,12 +929,15 @@ do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path, globfree(&g); return err; } + #ifndef WIN32_FIXME if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1) width = ws.ws_col; #endif + + if (!(lflag & LS_SHORT_VIEW)) { /* Count entries for sort and find longest filename */ for (i = 0; g.gl_pathv[i]; i++) @@ -858,7 +948,7 @@ do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path, colspace = width / columns; } - for (i = 0; g.gl_pathv[i] && !interrupted; i++, a = NULL) { + for (i = 0; g.gl_pathv[i] && !interrupted; i++) { fname = path_strip(g.gl_pathv[i], strip_path); if (lflag & LS_LONG_VIEW) { if (g.gl_statv[i] == NULL) { @@ -868,7 +958,7 @@ do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path, lname = ls_file(fname, g.gl_statv[i], 1, (lflag & LS_SI_UNITS)); printf("%s\n", lname); - xfree(lname); + free(lname); } else { printf("%-*s", colspace, fname); if (c >= columns) { @@ -877,7 +967,7 @@ do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path, } else c++; } - xfree(fname); + free(fname); } if (!(lflag & LS_LONG_VIEW) && (c != 1)) @@ -991,7 +1081,7 @@ undo_glob_escape(char *s) * * If "lastquote" is not NULL, the quoting character used for the last * argument is placed in *lastquote ("\0", "'" or "\""). - * + * * If "terminated" is not NULL, *terminated will be set to 1 when the * last argument's quote has been properly terminated or 0 otherwise. * This parameter is only of use if "sloppy" is set. @@ -1021,7 +1111,11 @@ makeargv(const char *arg, int *argcp, int sloppy, char *lastquote, state = MA_START; i = j = 0; for (;;) { - if (isspace(arg[i])) { + if ((size_t)argc >= sizeof(argv) / sizeof(*argv)){ + error("Too many arguments."); + return NULL; + } + if (isspace((unsigned char)arg[i])) { if (state == MA_UNQUOTED) { /* Terminate current argument */ argvs[j++] = '\0'; @@ -1036,7 +1130,7 @@ makeargv(const char *arg, int *argcp, int sloppy, char *lastquote, state = q; if (lastquote != NULL) *lastquote = arg[i]; - } else if (state == MA_UNQUOTED) + } else if (state == MA_UNQUOTED) state = q; else if (state == q) state = MA_UNQUOTED; @@ -1142,8 +1236,10 @@ makeargv(const char *arg, int *argcp, int sloppy, char *lastquote, } static int -parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, - int *hflag, int *sflag, unsigned long *n_arg, char **path1, char **path2) +parse_args(const char **cpp, int *ignore_errors, int *aflag, + int *fflag, int *hflag, int *iflag, int *lflag, int *pflag, + int *rflag, int *sflag, + unsigned long *n_arg, char **path1, char **path2) { const char *cmd, *cp = *cpp; char *cp2, **argv; @@ -1155,9 +1251,9 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, cp = cp + strspn(cp, WHITESPACE); /* Check for leading '-' (disable error processing) */ - *iflag = 0; + *ignore_errors = 0; if (*cp == '-') { - *iflag = 1; + *ignore_errors = 1; cp++; cp = cp + strspn(cp, WHITESPACE); } @@ -1171,7 +1267,7 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, /* Figure out which command we have */ for (i = 0; cmds[i].c != NULL; i++) { - if (strcasecmp(cmds[i].c, argv[0]) == 0) + if (argv[0] != NULL && strcasecmp(cmds[i].c, argv[0]) == 0) break; } cmdnum = cmds[i].n; @@ -1187,14 +1283,17 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, } /* Get arguments and parse flags */ - *lflag = *pflag = *rflag = *hflag = *n_arg = 0; + *aflag = *fflag = *hflag = *iflag = *lflag = *pflag = 0; + *rflag = *sflag = 0; *path1 = *path2 = NULL; optidx = 1; switch (cmdnum) { case I_GET: + case I_REGET: + case I_REPUT: case I_PUT: if ((optidx = parse_getput_flags(cmd, argv, argc, - pflag, rflag)) == -1) + aflag, fflag, pflag, rflag)) == -1) return -1; /* Get first pathname (mandatory) */ if (argc - optidx < 1) { @@ -1213,8 +1312,15 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, case I_LINK: if ((optidx = parse_link_flags(cmd, argv, argc, sflag)) == -1) return -1; - case I_SYMLINK: + goto parse_two_paths; case I_RENAME: + if ((optidx = parse_rename_flags(cmd, argv, argc, lflag)) == -1) + return -1; + goto parse_two_paths; + case I_SYMLINK: + if ((optidx = parse_no_flags(cmd, argv, argc)) == -1) + return -1; + parse_two_paths: if (argc - optidx < 2) { error("You must specify two paths after a %s " "command.", cmd); @@ -1232,6 +1338,8 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, case I_CHDIR: case I_LCHDIR: case I_LMKDIR: + if ((optidx = parse_no_flags(cmd, argv, argc)) == -1) + return -1; /* Get pathname (mandatory) */ if (argc - optidx < 1) { error("You must specify a path after a %s command.", @@ -1273,6 +1381,8 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, base = 8; case I_CHOWN: case I_CHGRP: + if ((optidx = parse_no_flags(cmd, argv, argc)) == -1) + return -1; /* Get numeric arg (mandatory) */ if (argc - optidx < 1) goto need_num_arg; @@ -1303,6 +1413,8 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag, case I_HELP: case I_VERSION: case I_PROGRESS: + if ((optidx = parse_no_flags(cmd, argv, argc)) == -1) + return -1; break; default: fatal("Command not implemented"); @@ -1317,19 +1429,20 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, int err_abort) { char *path1, *path2, *tmp; - int pflag = 0, rflag = 0, lflag = 0, iflag = 0, hflag = 0, sflag = 0; + int ignore_errors = 0, aflag = 0, fflag = 0, hflag = 0, + iflag = 0; + int lflag = 0, pflag = 0, rflag = 0, sflag = 0; int cmdnum, i; unsigned long n_arg = 0; Attrib a, *aa; - char path_buf[MAXPATHLEN]; + char path_buf[PATH_MAX]; int err = 0; glob_t g; path1 = path2 = NULL; - cmdnum = parse_args(&cmd, &pflag, &rflag, &lflag, &iflag, &hflag, - &sflag, &n_arg, &path1, &path2); - - if (iflag != 0) + cmdnum = parse_args(&cmd, &ignore_errors, &aflag, &fflag, &hflag, + &iflag, &lflag, &pflag, &rflag, &sflag, &n_arg, &path1, &path2); + if (ignore_errors != 0) err_abort = 0; memset(&g, 0, sizeof(g)); @@ -1343,21 +1456,30 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, /* Unrecognized command */ err = -1; break; + case I_REGET: + aflag = 1; + /* FALLTHROUGH */ case I_GET: - err = process_get(conn, path1, path2, *pwd, pflag, rflag); + err = process_get(conn, path1, path2, *pwd, pflag, + rflag, aflag, fflag); break; + case I_REPUT: + aflag = 1; + /* FALLTHROUGH */ case I_PUT: - err = process_put(conn, path1, path2, *pwd, pflag, rflag); + err = process_put(conn, path1, path2, *pwd, pflag, + rflag, aflag, fflag); break; case I_RENAME: path1 = make_absolute(path1, *pwd); path2 = make_absolute(path2, *pwd); - err = do_rename(conn, path1, path2); + err = do_rename(conn, path1, path2, lflag); break; case I_SYMLINK: sflag = 1; case I_LINK: - path1 = make_absolute(path1, *pwd); + if (!sflag) + path1 = make_absolute(path1, *pwd); path2 = make_absolute(path2, *pwd); err = (sflag ? do_symlink : do_hardlink)(conn, path1, path2); break; @@ -1365,7 +1487,8 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, path1 = make_absolute(path1, *pwd); remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g); for (i = 0; g.gl_pathv[i] && !interrupted; i++) { - printf("Removing %s\n", g.gl_pathv[i]); + if (!quiet) + printf("Removing %s\n", g.gl_pathv[i]); err = do_rm(conn, g.gl_pathv[i]); if (err != 0 && err_abort) break; @@ -1389,24 +1512,24 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, break; } if ((aa = do_stat(conn, tmp, 0)) == NULL) { - xfree(tmp); + free(tmp); err = 1; break; } if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) { error("Can't change directory: Can't check target"); - xfree(tmp); + free(tmp); err = 1; break; } if (!S_ISDIR(aa->perm)) { error("Can't change directory: \"%s\" is not " "a directory", tmp); - xfree(tmp); + free(tmp); err = 1; break; } - xfree(*pwd); + free(*pwd); *pwd = tmp; break; case I_LS: @@ -1431,6 +1554,9 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, err = do_df(conn, path1, hflag, iflag); break; case I_LCHDIR: + tmp = tilde_expand_filename(path1, getuid()); + free(path1); + path1 = tmp; if (chdir(path1) == -1) { error("Couldn't change local directory to " "\"%s\": %s", path1, strerror(errno)); @@ -1461,7 +1587,8 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, a.perm = n_arg; remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g); for (i = 0; g.gl_pathv[i] && !interrupted; i++) { - printf("Changing mode on %s\n", g.gl_pathv[i]); + if (!quiet) + printf("Changing mode on %s\n", g.gl_pathv[i]); err = do_setstat(conn, g.gl_pathv[i], &a); if (err != 0 && err_abort) break; @@ -1490,10 +1617,14 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, } aa->flags &= SSH2_FILEXFER_ATTR_UIDGID; if (cmdnum == I_CHOWN) { - printf("Changing owner on %s\n", g.gl_pathv[i]); + if (!quiet) + printf("Changing owner on %s\n", + g.gl_pathv[i]); aa->uid = n_arg; } else { - printf("Changing group on %s\n", g.gl_pathv[i]); + if (!quiet) + printf("Changing group on %s\n", + g.gl_pathv[i]); aa->gid = n_arg; } err = do_setstat(conn, g.gl_pathv[i], aa); @@ -1534,10 +1665,8 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd, if (g.gl_pathc) globfree(&g); - if (path1) - xfree(path1); - if (path2) - xfree(path2); + free(path1); + free(path2); /* If an unignored error occurs in batch mode we should abort. */ if (err_abort && err != 0) @@ -1564,7 +1693,7 @@ complete_display(char **list, u_int len) char *tmp; /* Count entries for sort and find longest */ - for (y = 0; list[y]; y++) + for (y = 0; list[y]; y++) m = MAX(m, strlen(list[y])); if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1) @@ -1609,8 +1738,8 @@ complete_ambiguous(const char *word, char **list, size_t count) for (y = 1; list[y]; y++) { u_int x; - for (x = 0; x < matchlen; x++) - if (list[0][x] != list[y][x]) + for (x = 0; x < matchlen; x++) + if (list[0][x] != list[y][x]) break; matchlen = x; @@ -1622,7 +1751,7 @@ complete_ambiguous(const char *word, char **list, size_t count) tmp[matchlen] = '\0'; return tmp; } - } + } return xstrdup(word); } @@ -1642,35 +1771,37 @@ complete_cmd_parse(EditLine *el, char *cmd, int lastarg, char quote, if (cmd == NULL) { for (y = 0; cmds[y].c; y++) list[count++] = xstrdup(cmds[y].c); - + list[count] = NULL; complete_display(list, 0); - for (y = 0; list[y] != NULL; y++) - xfree(list[y]); - xfree(list); + for (y = 0; list[y] != NULL; y++) + free(list[y]); + free(list); return count; } /* Prepare subset of commands that start with "cmd" */ cmdlen = strlen(cmd); for (y = 0; cmds[y].c; y++) { - if (!strncasecmp(cmd, cmds[y].c, cmdlen)) + if (!strncasecmp(cmd, cmds[y].c, cmdlen)) list[count++] = xstrdup(cmds[y].c); } list[count] = NULL; - if (count == 0) + if (count == 0) { + free(list); return 0; + } /* Complete ambigious command */ tmp = complete_ambiguous(cmd, list, count); if (count > 1) complete_display(list, 0); - for (y = 0; list[y]; y++) - xfree(list[y]); - xfree(list); + for (y = 0; list[y]; y++) + free(list[y]); + free(list); if (tmp != NULL) { tmplen = strlen(tmp); @@ -1691,7 +1822,7 @@ complete_cmd_parse(EditLine *el, char *cmd, int lastarg, char quote, if (y > 0 && el_insertstr(el, argterm) == -1) fatal("el_insertstr failed."); } - xfree(tmp); + free(tmp); } return count; @@ -1709,7 +1840,7 @@ complete_is_remote(char *cmd) { return -1; for (i = 0; cmds[i].c; i++) { - if (!strncasecmp(cmd, cmds[i].c, strlen(cmds[i].c))) + if (!strncasecmp(cmd, cmds[i].c, strlen(cmds[i].c))) return cmds[i].t; } @@ -1722,23 +1853,27 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, char *file, int remote, int lastarg, char quote, int terminated) { glob_t g; - char *tmp, *tmp2, ins[3]; - u_int i, hadglob, pwdlen, len, tmplen, filelen; + char *tmp, *tmp2, ins[8]; + u_int i, hadglob, pwdlen, len, tmplen, filelen, cesc, isesc, isabs; + int clen; const LineInfo *lf; - + /* Glob from "file" location */ if (file == NULL) tmp = xstrdup("*"); else xasprintf(&tmp, "%s*", file); + /* Check if the path is absolute. */ + isabs = tmp[0] == '/'; + memset(&g, 0, sizeof(g)); if (remote != LOCAL) { tmp = make_absolute(tmp, remote_path); remote_glob(conn, tmp, GLOB_DOOFFS|GLOB_MARK, NULL, &g); - } else + } else glob(tmp, GLOB_DOOFFS|GLOB_MARK, NULL, &g); - + /* Determine length of pwd so we can trim completion display */ for (hadglob = tmplen = pwdlen = 0; tmp[tmplen] != 0; tmplen++) { /* Terminate counting on first unescaped glob metacharacter */ @@ -1752,22 +1887,22 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, if (tmp[tmplen] == '/') pwdlen = tmplen + 1; /* track last seen '/' */ } - xfree(tmp); + free(tmp); + tmp = NULL; - if (g.gl_matchc == 0) + if (g.gl_matchc == 0) goto out; if (g.gl_matchc > 1) complete_display(g.gl_pathv, pwdlen); - tmp = NULL; /* Don't try to extend globs */ if (file == NULL || hadglob) goto out; tmp2 = complete_ambiguous(file, g.gl_pathv, g.gl_matchc); - tmp = path_strip(tmp2, remote_path); - xfree(tmp2); + tmp = path_strip(tmp2, isabs ? NULL : remote_path); + free(tmp2); if (tmp == NULL) goto out; @@ -1775,14 +1910,27 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, tmplen = strlen(tmp); filelen = strlen(file); - if (tmplen > filelen) { - tmp2 = tmp + filelen; - len = strlen(tmp2); + /* Count the number of escaped characters in the input string. */ + cesc = isesc = 0; + for (i = 0; i < filelen; i++) { + if (!isesc && file[i] == '\\' && i + 1 < filelen){ + isesc = 1; + cesc++; + } else + isesc = 0; + } + + if (tmplen > (filelen - cesc)) { + tmp2 = tmp + filelen - cesc; + len = strlen(tmp2); /* quote argument on way out */ - for (i = 0; i < len; i++) { + for (i = 0; i < len; i += clen) { + if ((clen = mblen(tmp2 + i, len - i)) < 0 || + (size_t)clen > sizeof(ins) - 2) + fatal("invalid multibyte character"); ins[0] = '\\'; - ins[1] = tmp2[i]; - ins[2] = '\0'; + memcpy(ins + 1, tmp2 + i, clen); + ins[clen + 1] = '\0'; switch (tmp2[i]) { case '\'': case '"': @@ -1790,6 +1938,8 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, case '\t': case '[': case ' ': + case '#': + case '*': if (quote == '\0' || tmp2[i] == quote) { if (el_insertstr(el, ins) == -1) fatal("el_insertstr " @@ -1808,7 +1958,7 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, lf = el_line(el); if (g.gl_matchc == 1) { i = 0; - if (!terminated) + if (!terminated && quote != '\0') ins[i++] = quote; if (*(lf->cursor - 1) != '/' && (lastarg || *(lf->cursor) != ' ')) @@ -1817,7 +1967,7 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, if (i > 0 && el_insertstr(el, ins) == -1) fatal("el_insertstr failed."); } - xfree(tmp); + free(tmp); out: globfree(&g); @@ -1828,8 +1978,9 @@ complete_match(EditLine *el, struct sftp_conn *conn, char *remote_path, static unsigned char complete(EditLine *el, int ch) { - char **argv, *line, quote; - u_int argc, carg, cursor, len, terminated, ret = CC_ERROR; + char **argv, *line, quote; + int argc, carg; + u_int cursor, len, terminated, ret = CC_ERROR; const LineInfo *lf; struct complete_ctx *complete_ctx; @@ -1839,15 +1990,15 @@ complete(EditLine *el, int ch) /* Figure out which argument the cursor points to */ cursor = lf->cursor - lf->buffer; - line = (char *)xmalloc(cursor + 1); + line = xmalloc(cursor + 1); memcpy(line, lf->buffer, cursor); line[cursor] = '\0'; argv = makeargv(line, &carg, 1, "e, &terminated); - xfree(line); + free(line); /* Get all the arguments on the line */ len = lf->lastchar - lf->buffer; - line = (char *)xmalloc(len + 1); + line = xmalloc(len + 1); memcpy(line, lf->buffer, len); line[len] = '\0'; argv = makeargv(line, &argc, 1, NULL, NULL); @@ -1855,7 +2006,7 @@ complete(EditLine *el, int ch) /* Ensure cursor is at EOL or a argument boundary */ if (line[cursor] != ' ' && line[cursor] != '\0' && line[cursor] != '\n') { - xfree(line); + free(line); return ret; } @@ -1866,7 +2017,7 @@ complete(EditLine *el, int ch) } else if (carg == 1 && cursor > 0 && line[cursor - 1] != ' ') { /* Handle the command parsing */ if (complete_cmd_parse(el, argv[0], argc == carg, - quote, terminated) != 0) + quote, terminated) != 0) ret = CC_REDISPLAY; } else if (carg >= 1) { /* Handle file parsing */ @@ -1879,11 +2030,11 @@ complete(EditLine *el, int ch) if (remote != 0 && complete_match(el, complete_ctx->conn, *complete_ctx->remote_pathp, filematch, - remote, carg == argc, quote, terminated) != 0) + remote, carg == argc, quote, terminated) != 0) ret = CC_REDISPLAY; } - xfree(line); + free(line); return ret; } #endif /* USE_LIBEDIT */ @@ -1917,12 +2068,19 @@ interactive_loop(struct sftp_conn *conn, char *file1, char *file2) el_source(el, NULL); /* Tab Completion */ - el_set(el, EL_ADDFN, "ftp-complete", + el_set(el, EL_ADDFN, "ftp-complete", "Context sensitive argument completion", complete); complete_ctx.conn = conn; complete_ctx.remote_pathp = &remote_path; el_set(el, EL_CLIENTDATA, (void*)&complete_ctx); el_set(el, EL_BIND, "^I", "ftp-complete", NULL); + /* enable ctrl-left-arrow and ctrl-right-arrow */ + el_set(el, EL_BIND, "\\e[1;5C", "em-next-word", NULL); + el_set(el, EL_BIND, "\\e[5C", "em-next-word", NULL); + el_set(el, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL); + el_set(el, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL); + /* make ^w match ksh behaviour */ + el_set(el, EL_BIND, "^w", "ed-delete-prev-word", NULL); } #endif /* USE_LIBEDIT */ @@ -1935,39 +2093,34 @@ interactive_loop(struct sftp_conn *conn, char *file1, char *file2) dir = make_absolute(dir, remote_path); if (remote_is_dir(conn, dir) && file2 == NULL) { - printf("Changing to: %s\n", dir); + if (!quiet) + printf("Changing to: %s\n", dir); snprintf(cmd, sizeof cmd, "cd \"%s\"", dir); if (parse_dispatch_command(conn, cmd, &remote_path, 1) != 0) { - xfree(dir); - xfree(remote_path); - xfree(conn); + free(dir); + free(remote_path); + free(conn); return (-1); } } else { - if (file2 == NULL) - snprintf(cmd, sizeof cmd, "get %s", dir); - else - snprintf(cmd, sizeof cmd, "get %s %s", dir, - file2); - + /* XXX this is wrong wrt quoting */ + snprintf(cmd, sizeof cmd, "get%s %s%s%s", + global_aflag ? " -a" : "", dir, + file2 == NULL ? "" : " ", + file2 == NULL ? "" : file2); err = parse_dispatch_command(conn, cmd, &remote_path, 1); - xfree(dir); - xfree(remote_path); - xfree(conn); + free(dir); + free(remote_path); + free(conn); return (err); } - xfree(dir); + free(dir); } -#if defined(HAVE_SETVBUF) && !defined(BROKEN_SETVBUF) setvbuf(stdout, NULL, _IOLBF, 0); setvbuf(infile, NULL, _IOLBF, 0); -#else - setlinebuf(stdout); - setlinebuf(infile); -#endif interactive = !batchmode && isatty(STDIN_FILENO); err = 0; @@ -2021,8 +2174,8 @@ interactive_loop(struct sftp_conn *conn, char *file1, char *file2) if (err != 0) break; } - xfree(remote_path); - xfree(conn); + free(remote_path); + free(conn); #ifdef USE_LIBEDIT if (el != NULL) @@ -2036,7 +2189,7 @@ interactive_loop(struct sftp_conn *conn, char *file1, char *file2) static void connect_to_server(char *path, char **args, int *in, int *out) { - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME /* * Win32 code. @@ -2212,7 +2365,6 @@ connect_to_server(char *path, char **args, int *in, int *out) /* * Original OpenSSH code. */ - int c_in, c_out; #ifdef USE_PIPES @@ -2265,8 +2417,7 @@ connect_to_server(char *path, char **args, int *in, int *out) signal(SIGHUP, killchild); close(c_in); close(c_out); - - #endif +#endif } static void @@ -2275,7 +2426,7 @@ usage(void) extern char *__progname; fprintf(stderr, - "usage: %s [-1246Cpqrv] [-B buffer_size] [-b batchfile] [-c cipher]\n" + "usage: %s [-1246aCfpqrv] [-B buffer_size] [-b batchfile] [-c cipher]\n" " [-D sftp_server_path] [-F ssh_config] " "[-i identity_file] [-l limit]\n" " [-o ssh_option] [-P port] [-R num_requests] " @@ -2306,7 +2457,7 @@ main(int argc, char **argv) size_t num_requests = DEFAULT_NUM_REQUESTS; long long limit_kbps = 0; - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME /* * Initialize I/O wrappers. @@ -2359,15 +2510,16 @@ main(int argc, char **argv) */ #endif - /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ sanitise_stdfd(); +#ifndef WIN32_FIXME + setlocale(LC_CTYPE, ""); +#endif __progname = ssh_get_progname(argv[0]); memset(&args, '\0', sizeof(args)); args.list = NULL; addargs(&args, "%s", ssh_program); - #ifdef WIN32_FIXME addargs(&args, "-oForwardX11=no"); @@ -2376,19 +2528,16 @@ main(int argc, char **argv) addargs(&args, "-oClearAllForwardings=yes"); #else - addargs(&args, "-oForwardX11 no"); addargs(&args, "-oForwardAgent no"); addargs(&args, "-oPermitLocalCommand no"); addargs(&args, "-oClearAllForwardings yes"); - - #endif - +#endif ll = SYSLOG_LEVEL_INFO; infile = stdin; while ((ch = getopt(argc, argv, - "1246hpqrvCc:D:i:l:o:s:S:b:B:F:P:R:")) != -1) { + "1246afhpqrvCc:D:i:l:o:s:S:b:B:F:P:R:")) != -1) { switch (ch) { /* Passed through to ssh(1) */ case '4': @@ -2405,12 +2554,13 @@ main(int argc, char **argv) addargs(&args, "%s", optarg); break; case 'q': + ll = SYSLOG_LEVEL_ERROR; + quiet = 1; showprogress = 0; addargs(&args, "-%c", ch); break; case 'P': - - #ifdef WIN32_FIXME + #ifdef WIN32_FIXME addargs(&args, "-oPort=%s", optarg); @@ -2419,7 +2569,7 @@ main(int argc, char **argv) addargs(&args, "-oPort %s", optarg); #endif - + break; case 'v': if (debug_level < 3) { @@ -2436,6 +2586,9 @@ main(int argc, char **argv) case '2': sshver = 2; break; + case 'a': + global_aflag = 1; + break; case 'B': copy_buffer_len = strtol(optarg, &cp, 10); if (copy_buffer_len == 0 || *cp != '\0') @@ -2450,9 +2603,8 @@ main(int argc, char **argv) (infile = fopen(optarg, "r")) == NULL) fatal("%s (%s).", strerror(errno), optarg); showprogress = 0; - batchmode = 1; - - #ifdef WIN32_FIXME + quiet = batchmode = 1; + #ifdef WIN32_FIXME addargs(&args, "-obatchmode=yes"); @@ -2461,7 +2613,10 @@ main(int argc, char **argv) addargs(&args, "-obatchmode yes"); #endif - + + break; + case 'f': + global_fflag = 1; break; case 'p': global_pflag = 1; @@ -2532,7 +2687,6 @@ main(int argc, char **argv) fprintf(stderr, "Missing hostname\n"); usage(); } - #ifdef WIN32_FIXME addargs(&args, "-oProtocol=%d", sshver); @@ -2542,6 +2696,7 @@ main(int argc, char **argv) addargs(&args, "-oProtocol %d", sshver); #endif + /* no subsystem if the server-spec contains a '/' */ if (sftp_server == NULL || strchr(sftp_server, '/') == NULL) @@ -2556,23 +2711,22 @@ main(int argc, char **argv) } else { args.list = NULL; addargs(&args, "sftp-server"); - + connect_to_server(sftp_direct, args.list, &in, &out); } freeargs(&args); - - conn = do_init(in, out, copy_buffer_len, num_requests, limit_kbps); + conn = do_init(in, out, copy_buffer_len, num_requests, limit_kbps); if (conn == NULL) fatal("Couldn't initialise connection to server"); - if (!batchmode) { + if (!quiet) { if (sftp_direct == NULL) fprintf(stderr, "Connected to %s.\n", host); else fprintf(stderr, "Attached to %s.\n", sftp_direct); } - + err = interactive_loop(conn, file1, file2); #if !defined(USE_PIPES) diff --git a/smult_curve25519_ref.c b/smult_curve25519_ref.c new file mode 100644 index 0000000..2e69934 --- /dev/null +++ b/smult_curve25519_ref.c @@ -0,0 +1,265 @@ +/* $OpenBSD: smult_curve25519_ref.c,v 1.2 2013/11/02 22:02:14 markus Exp $ */ +/* +version 20081011 +Matthew Dempsky +Public domain. +Derived from public domain code by D. J. Bernstein. +*/ + +int crypto_scalarmult_curve25519(unsigned char *, const unsigned char *, const unsigned char *); + +static void add(unsigned int out[32],const unsigned int a[32],const unsigned int b[32]) +{ + unsigned int j; + unsigned int u; + u = 0; + for (j = 0;j < 31;++j) { u += a[j] + b[j]; out[j] = u & 255; u >>= 8; } + u += a[31] + b[31]; out[31] = u; +} + +static void sub(unsigned int out[32],const unsigned int a[32],const unsigned int b[32]) +{ + unsigned int j; + unsigned int u; + u = 218; + for (j = 0;j < 31;++j) { + u += a[j] + 65280 - b[j]; + out[j] = u & 255; + u >>= 8; + } + u += a[31] - b[31]; + out[31] = u; +} + +static void squeeze(unsigned int a[32]) +{ + unsigned int j; + unsigned int u; + u = 0; + for (j = 0;j < 31;++j) { u += a[j]; a[j] = u & 255; u >>= 8; } + u += a[31]; a[31] = u & 127; + u = 19 * (u >> 7); + for (j = 0;j < 31;++j) { u += a[j]; a[j] = u & 255; u >>= 8; } + u += a[31]; a[31] = u; +} + +static const unsigned int minusp[32] = { + 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128 +} ; + +static void freeze(unsigned int a[32]) +{ + unsigned int aorig[32]; + unsigned int j; + unsigned int negative; + + for (j = 0;j < 32;++j) aorig[j] = a[j]; + add(a,a,minusp); + negative = -((a[31] >> 7) & 1); + for (j = 0;j < 32;++j) a[j] ^= negative & (aorig[j] ^ a[j]); +} + +static void mult(unsigned int out[32],const unsigned int a[32],const unsigned int b[32]) +{ + unsigned int i; + unsigned int j; + unsigned int u; + + for (i = 0;i < 32;++i) { + u = 0; + for (j = 0;j <= i;++j) u += a[j] * b[i - j]; + for (j = i + 1;j < 32;++j) u += 38 * a[j] * b[i + 32 - j]; + out[i] = u; + } + squeeze(out); +} + +static void mult121665(unsigned int out[32],const unsigned int a[32]) +{ + unsigned int j; + unsigned int u; + + u = 0; + for (j = 0;j < 31;++j) { u += 121665 * a[j]; out[j] = u & 255; u >>= 8; } + u += 121665 * a[31]; out[31] = u & 127; + u = 19 * (u >> 7); + for (j = 0;j < 31;++j) { u += out[j]; out[j] = u & 255; u >>= 8; } + u += out[j]; out[j] = u; +} + +static void square(unsigned int out[32],const unsigned int a[32]) +{ + unsigned int i; + unsigned int j; + unsigned int u; + + for (i = 0;i < 32;++i) { + u = 0; + for (j = 0;j < i - j;++j) u += a[j] * a[i - j]; + for (j = i + 1;j < i + 32 - j;++j) u += 38 * a[j] * a[i + 32 - j]; + u *= 2; + if ((i & 1) == 0) { + u += a[i / 2] * a[i / 2]; + u += 38 * a[i / 2 + 16] * a[i / 2 + 16]; + } + out[i] = u; + } + squeeze(out); +} + +static void select(unsigned int p[64],unsigned int q[64],const unsigned int r[64],const unsigned int s[64],unsigned int b) +{ + unsigned int j; + unsigned int t; + unsigned int bminus1; + + bminus1 = b - 1; + for (j = 0;j < 64;++j) { + t = bminus1 & (r[j] ^ s[j]); + p[j] = s[j] ^ t; + q[j] = r[j] ^ t; + } +} + +static void mainloop(unsigned int work[64],const unsigned char e[32]) +{ + unsigned int xzm1[64]; + unsigned int xzm[64]; + unsigned int xzmb[64]; + unsigned int xzm1b[64]; + unsigned int xznb[64]; + unsigned int xzn1b[64]; + unsigned int a0[64]; + unsigned int a1[64]; + unsigned int b0[64]; + unsigned int b1[64]; + unsigned int c1[64]; + unsigned int r[32]; + unsigned int s[32]; + unsigned int t[32]; + unsigned int u[32]; + unsigned int j; + unsigned int b; + int pos; + + for (j = 0;j < 32;++j) xzm1[j] = work[j]; + xzm1[32] = 1; + for (j = 33;j < 64;++j) xzm1[j] = 0; + + xzm[0] = 1; + for (j = 1;j < 64;++j) xzm[j] = 0; + + for (pos = 254;pos >= 0;--pos) { + b = e[pos / 8] >> (pos & 7); + b &= 1; + select(xzmb,xzm1b,xzm,xzm1,b); + add(a0,xzmb,xzmb + 32); + sub(a0 + 32,xzmb,xzmb + 32); + add(a1,xzm1b,xzm1b + 32); + sub(a1 + 32,xzm1b,xzm1b + 32); + square(b0,a0); + square(b0 + 32,a0 + 32); + mult(b1,a1,a0 + 32); + mult(b1 + 32,a1 + 32,a0); + add(c1,b1,b1 + 32); + sub(c1 + 32,b1,b1 + 32); + square(r,c1 + 32); + sub(s,b0,b0 + 32); + mult121665(t,s); + add(u,t,b0); + mult(xznb,b0,b0 + 32); + mult(xznb + 32,s,u); + square(xzn1b,c1); + mult(xzn1b + 32,r,work); + select(xzm,xzm1,xznb,xzn1b,b); + } + + for (j = 0;j < 64;++j) work[j] = xzm[j]; +} + +static void recip(unsigned int out[32],const unsigned int z[32]) +{ + unsigned int z2[32]; + unsigned int z9[32]; + unsigned int z11[32]; + unsigned int z2_5_0[32]; + unsigned int z2_10_0[32]; + unsigned int z2_20_0[32]; + unsigned int z2_50_0[32]; + unsigned int z2_100_0[32]; + unsigned int t0[32]; + unsigned int t1[32]; + int i; + + /* 2 */ square(z2,z); + /* 4 */ square(t1,z2); + /* 8 */ square(t0,t1); + /* 9 */ mult(z9,t0,z); + /* 11 */ mult(z11,z9,z2); + /* 22 */ square(t0,z11); + /* 2^5 - 2^0 = 31 */ mult(z2_5_0,t0,z9); + + /* 2^6 - 2^1 */ square(t0,z2_5_0); + /* 2^7 - 2^2 */ square(t1,t0); + /* 2^8 - 2^3 */ square(t0,t1); + /* 2^9 - 2^4 */ square(t1,t0); + /* 2^10 - 2^5 */ square(t0,t1); + /* 2^10 - 2^0 */ mult(z2_10_0,t0,z2_5_0); + + /* 2^11 - 2^1 */ square(t0,z2_10_0); + /* 2^12 - 2^2 */ square(t1,t0); + /* 2^20 - 2^10 */ for (i = 2;i < 10;i += 2) { square(t0,t1); square(t1,t0); } + /* 2^20 - 2^0 */ mult(z2_20_0,t1,z2_10_0); + + /* 2^21 - 2^1 */ square(t0,z2_20_0); + /* 2^22 - 2^2 */ square(t1,t0); + /* 2^40 - 2^20 */ for (i = 2;i < 20;i += 2) { square(t0,t1); square(t1,t0); } + /* 2^40 - 2^0 */ mult(t0,t1,z2_20_0); + + /* 2^41 - 2^1 */ square(t1,t0); + /* 2^42 - 2^2 */ square(t0,t1); + /* 2^50 - 2^10 */ for (i = 2;i < 10;i += 2) { square(t1,t0); square(t0,t1); } + /* 2^50 - 2^0 */ mult(z2_50_0,t0,z2_10_0); + + /* 2^51 - 2^1 */ square(t0,z2_50_0); + /* 2^52 - 2^2 */ square(t1,t0); + /* 2^100 - 2^50 */ for (i = 2;i < 50;i += 2) { square(t0,t1); square(t1,t0); } + /* 2^100 - 2^0 */ mult(z2_100_0,t1,z2_50_0); + + /* 2^101 - 2^1 */ square(t1,z2_100_0); + /* 2^102 - 2^2 */ square(t0,t1); + /* 2^200 - 2^100 */ for (i = 2;i < 100;i += 2) { square(t1,t0); square(t0,t1); } + /* 2^200 - 2^0 */ mult(t1,t0,z2_100_0); + + /* 2^201 - 2^1 */ square(t0,t1); + /* 2^202 - 2^2 */ square(t1,t0); + /* 2^250 - 2^50 */ for (i = 2;i < 50;i += 2) { square(t0,t1); square(t1,t0); } + /* 2^250 - 2^0 */ mult(t0,t1,z2_50_0); + + /* 2^251 - 2^1 */ square(t1,t0); + /* 2^252 - 2^2 */ square(t0,t1); + /* 2^253 - 2^3 */ square(t1,t0); + /* 2^254 - 2^4 */ square(t0,t1); + /* 2^255 - 2^5 */ square(t1,t0); + /* 2^255 - 21 */ mult(out,t1,z11); +} + +int crypto_scalarmult_curve25519(unsigned char *q, + const unsigned char *n, + const unsigned char *p) +{ + unsigned int work[96]; + unsigned char e[32]; + unsigned int i; + for (i = 0;i < 32;++i) e[i] = n[i]; + e[0] &= 248; + e[31] &= 127; + e[31] |= 64; + for (i = 0;i < 32;++i) work[i] = p[i]; + mainloop(work,e); + recip(work + 32,work + 32); + mult(work + 64,work,work + 32); + freeze(work + 64); + for (i = 0;i < 32;++i) q[i] = work[64 + i]; + return 0; +} diff --git a/ssh-add.c b/ssh-add.c index a94efaa..16cdbb6 100644 --- a/ssh-add.c +++ b/ssh-add.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-add.c,v 1.101 2011/05/04 21:15:29 djm Exp $ */ +/* $OpenBSD: ssh-add.c,v 1.123 2015/07/03 03:43:18 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -39,11 +39,11 @@ #include #include -#include #include #include "openbsd-compat/openssl-compat.h" +#include #include #include #include @@ -51,32 +51,42 @@ #include #include #include +#include #include "xmalloc.h" #include "ssh.h" #include "rsa.h" #include "log.h" -#include "key.h" -#include "buffer.h" +#include "sshkey.h" +#include "sshbuf.h" #include "authfd.h" #include "authfile.h" #include "pathnames.h" #include "misc.h" +#include "ssherr.h" +#include "digest.h" /* argv0 */ extern char *__progname; /* Default files to add */ static char *default_files[] = { +#ifdef WITH_OPENSSL _PATH_SSH_CLIENT_ID_RSA, _PATH_SSH_CLIENT_ID_DSA, #ifdef OPENSSL_HAS_ECC _PATH_SSH_CLIENT_ID_ECDSA, #endif +#endif /* WITH_OPENSSL */ + _PATH_SSH_CLIENT_ID_ED25519, +#ifdef WITH_SSH1 _PATH_SSH_CLIENT_IDENTITY, +#endif NULL }; +static int fingerprint_hash = SSH_FP_HASH_DEFAULT; + /* Default lifetime (0 == forever) */ static int lifetime = 0; @@ -89,46 +99,77 @@ static void clear_pass(void) { if (pass) { - memset(pass, 0, strlen(pass)); - xfree(pass); + explicit_bzero(pass, strlen(pass)); + free(pass); pass = NULL; } } static int -delete_file(AuthenticationConnection *ac, const char *filename) +delete_file(int agent_fd, const char *filename, int key_only) { - Key *public; - char *comment = NULL; - int ret = -1; + struct sshkey *public, *cert = NULL; + char *certpath = NULL, *comment = NULL; + int r, ret = -1; - public = key_load_public(filename, &comment); - if (public == NULL) { - printf("Bad key file %s\n", filename); + if ((r = sshkey_load_public(filename, &public, &comment)) != 0) { + printf("Bad key file %s: %s\n", filename, ssh_err(r)); return -1; } - if (ssh_remove_identity(ac, public)) { + if ((r = ssh_remove_identity(agent_fd, public)) == 0) { fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); ret = 0; } else - fprintf(stderr, "Could not remove identity: %s\n", filename); + fprintf(stderr, "Could not remove identity \"%s\": %s\n", + filename, ssh_err(r)); - key_free(public); - xfree(comment); + if (key_only) + goto out; + + /* Now try to delete the corresponding certificate too */ + free(comment); + comment = NULL; + xasprintf(&certpath, "%s-cert.pub", filename); + if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) { + if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) + error("Failed to load certificate \"%s\": %s", + certpath, ssh_err(r)); + goto out; + } + + if (!sshkey_equal_public(cert, public)) + fatal("Certificate %s does not match private key %s", + certpath, filename); + + if ((r = ssh_remove_identity(agent_fd, cert)) == 0) { + fprintf(stderr, "Identity removed: %s (%s)\n", certpath, + comment); + ret = 0; + } else + fprintf(stderr, "Could not remove identity \"%s\": %s\n", + certpath, ssh_err(r)); + + out: + if (cert != NULL) + sshkey_free(cert); + if (public != NULL) + sshkey_free(public); + free(certpath); + free(comment); return ret; } /* Send a request to remove all identities. */ static int -delete_all(AuthenticationConnection *ac) +delete_all(int agent_fd) { int ret = -1; - if (ssh_remove_all_identities(ac, 1)) + if (ssh_remove_all_identities(agent_fd, 2) == 0) ret = 0; - /* ignore error-code for ssh2 */ - ssh_remove_all_identities(ac, 2); + /* ignore error-code for ssh1 */ + ssh_remove_all_identities(agent_fd, 1); if (ret == 0) fprintf(stderr, "All identities removed.\n"); @@ -139,13 +180,13 @@ delete_all(AuthenticationConnection *ac) } static int -add_file(AuthenticationConnection *ac, const char *filename) +add_file(int agent_fd, const char *filename, int key_only) { - Key *private, *cert; + struct sshkey *private, *cert; char *comment = NULL; - char msg[1024], *certpath; - int fd, perms_ok, ret = -1; - Buffer keyblob; + char msg[1024], *certpath = NULL; + int r, fd, ret = -1; + struct sshbuf *keyblob; if (strcmp(filename, "-") == 0) { fd = STDIN_FILENO; @@ -160,53 +201,73 @@ add_file(AuthenticationConnection *ac, const char *filename) * will occur multiple times, so check perms first and bail if wrong. */ if (fd != STDIN_FILENO) { - perms_ok = key_perm_ok(fd, filename); - if (!perms_ok) { + if (sshkey_perm_ok(fd, filename) != 0) { close(fd); return -1; } } - buffer_init(&keyblob); - if (!key_load_file(fd, filename, &keyblob)) { - buffer_free(&keyblob); + if ((keyblob = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshkey_load_file(fd, keyblob)) != 0) { + fprintf(stderr, "Error loading key \"%s\": %s\n", + filename, ssh_err(r)); + sshbuf_free(keyblob); close(fd); return -1; } close(fd); /* At first, try empty passphrase */ - private = key_parse_private(&keyblob, filename, "", &comment); + if ((r = sshkey_parse_private_fileblob(keyblob, "", filename, + &private, &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) { + fprintf(stderr, "Error loading key \"%s\": %s\n", + filename, ssh_err(r)); + goto fail_load; + } + /* try last */ + if (private == NULL && pass != NULL) { + if ((r = sshkey_parse_private_fileblob(keyblob, pass, filename, + &private, &comment)) != 0 && + r != SSH_ERR_KEY_WRONG_PASSPHRASE) { + fprintf(stderr, "Error loading key \"%s\": %s\n", + filename, ssh_err(r)); + goto fail_load; + } + } if (comment == NULL) comment = xstrdup(filename); - /* try last */ - if (private == NULL && pass != NULL) - private = key_parse_private(&keyblob, filename, pass, NULL); if (private == NULL) { /* clear passphrase since it did not work */ clear_pass(); - snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ", - comment); + snprintf(msg, sizeof msg, "Enter passphrase for %.200s%s: ", + comment, confirm ? " (will confirm each use)" : ""); for (;;) { pass = read_passphrase(msg, RP_ALLOW_STDIN); - if (strcmp(pass, "") == 0) { + if (strcmp(pass, "") == 0) + goto fail_load; + if ((r = sshkey_parse_private_fileblob(keyblob, pass, + filename, &private, NULL)) == 0) + break; + else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) { + fprintf(stderr, + "Error loading key \"%s\": %s\n", + filename, ssh_err(r)); + fail_load: clear_pass(); - xfree(comment); - buffer_free(&keyblob); + free(comment); + sshbuf_free(keyblob); return -1; } - private = key_parse_private(&keyblob, filename, pass, - &comment); - if (private != NULL) - break; clear_pass(); snprintf(msg, sizeof msg, - "Bad passphrase, try again for %.200s: ", comment); + "Bad passphrase, try again for %.200s%s: ", comment, + confirm ? " (will confirm each use)" : ""); } } - buffer_free(&keyblob); + sshbuf_free(keyblob); - if (ssh_add_identity_constrained(ac, private, comment, lifetime, - confirm)) { + if ((r = ssh_add_identity_constrained(agent_fd, private, comment, + lifetime, confirm)) == 0) { fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); ret = 0; if (lifetime != 0) @@ -216,35 +277,48 @@ add_file(AuthenticationConnection *ac, const char *filename) fprintf(stderr, "The user must confirm each use of the key\n"); } else { - fprintf(stderr, "Could not add identity: %s\n", filename); + fprintf(stderr, "Could not add identity \"%s\": %s\n", + filename, ssh_err(r)); } + /* Skip trying to load the cert if requested */ + if (key_only) + goto out; /* Now try to add the certificate flavour too */ xasprintf(&certpath, "%s-cert.pub", filename); - if ((cert = key_load_public(certpath, NULL)) == NULL) + if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) { + if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) + error("Failed to load certificate \"%s\": %s", + certpath, ssh_err(r)); goto out; + } - if (!key_equal_public(cert, private)) { + if (!sshkey_equal_public(cert, private)) { error("Certificate %s does not match private key %s", certpath, filename); - key_free(cert); + sshkey_free(cert); goto out; } /* Graft with private bits */ - if (key_to_certified(private, key_cert_is_legacy(cert)) != 0) { - error("%s: key_to_certified failed", __func__); - key_free(cert); + if ((r = sshkey_to_certified(private)) != 0) { + error("%s: sshkey_to_certified: %s", __func__, ssh_err(r)); + sshkey_free(cert); goto out; } - key_cert_copy(cert, private); - key_free(cert); + if ((r = sshkey_cert_copy(cert, private)) != 0) { + error("%s: key_cert_copy: %s", __func__, ssh_err(r)); + sshkey_free(cert); + goto out; + } + sshkey_free(cert); - if (!ssh_add_identity_constrained(ac, private, comment, - lifetime, confirm)) { - error("Certificate %s (%s) add failed", certpath, - private->cert->key_id); + if ((r = ssh_add_identity_constrained(agent_fd, private, comment, + lifetime, confirm)) != 0) { + error("Certificate %s (%s) add failed: %s", certpath, + private->cert->key_id, ssh_err(r)); + goto out; } fprintf(stderr, "Certificate added: %s (%s)\n", certpath, private->cert->key_id); @@ -253,63 +327,82 @@ add_file(AuthenticationConnection *ac, const char *filename) if (confirm != 0) fprintf(stderr, "The user must confirm each use of the key\n"); out: - xfree(certpath); - xfree(comment); - key_free(private); + free(certpath); + free(comment); + sshkey_free(private); return ret; } static int -update_card(AuthenticationConnection *ac, int add, const char *id) +update_card(int agent_fd, int add, const char *id) { - char *pin; - int ret = -1; + char *pin = NULL; + int r, ret = -1; - pin = read_passphrase("Enter passphrase for PKCS#11: ", RP_ALLOW_STDIN); - if (pin == NULL) - return -1; + if (add) { + if ((pin = read_passphrase("Enter passphrase for PKCS#11: ", + RP_ALLOW_STDIN)) == NULL) + return -1; + } - if (ssh_update_card(ac, add, id, pin, lifetime, confirm)) { + if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin, + lifetime, confirm)) == 0) { fprintf(stderr, "Card %s: %s\n", add ? "added" : "removed", id); ret = 0; } else { - fprintf(stderr, "Could not %s card: %s\n", - add ? "add" : "remove", id); + fprintf(stderr, "Could not %s card \"%s\": %s\n", + add ? "add" : "remove", id, ssh_err(r)); ret = -1; } - xfree(pin); + free(pin); return ret; } static int -list_identities(AuthenticationConnection *ac, int do_fp) +list_identities(int agent_fd, int do_fp) { - Key *key; - char *comment, *fp; - int had_identities = 0; - int version; + char *fp; + int r, had_identities = 0; + struct ssh_identitylist *idlist; + size_t i; +#ifdef WITH_SSH1 + int version = 1; +#else + int version = 2; +#endif - for (version = 1; version <= 2; version++) { - for (key = ssh_get_first_identity(ac, &comment, version); - key != NULL; - key = ssh_get_next_identity(ac, &comment, version)) { + for (; version <= 2; version++) { + if ((r = ssh_fetch_identitylist(agent_fd, version, + &idlist)) != 0) { + if (r != SSH_ERR_AGENT_NO_IDENTITIES) + fprintf(stderr, "error fetching identities for " + "protocol %d: %s\n", version, ssh_err(r)); + continue; + } + for (i = 0; i < idlist->nkeys; i++) { had_identities = 1; if (do_fp) { - fp = key_fingerprint(key, SSH_FP_MD5, - SSH_FP_HEX); + fp = sshkey_fingerprint(idlist->keys[i], + fingerprint_hash, SSH_FP_DEFAULT); printf("%d %s %s (%s)\n", - key_size(key), fp, comment, key_type(key)); - xfree(fp); + sshkey_size(idlist->keys[i]), + fp == NULL ? "(null)" : fp, + idlist->comments[i], + sshkey_type(idlist->keys[i])); + free(fp); } else { - if (!key_write(key, stdout)) - fprintf(stderr, "key_write failed"); - fprintf(stdout, " %s\n", comment); + if ((r = sshkey_write(idlist->keys[i], + stdout)) != 0) { + fprintf(stderr, "sshkey_write: %s\n", + ssh_err(r)); + continue; + } + fprintf(stdout, " %s\n", idlist->comments[i]); } - key_free(key); - xfree(comment); } + ssh_free_identitylist(idlist); } if (!had_identities) { printf("The agent has no identities.\n"); @@ -319,10 +412,10 @@ list_identities(AuthenticationConnection *ac, int do_fp) } static int -lock_agent(AuthenticationConnection *ac, int lock) +lock_agent(int agent_fd, int lock) { char prompt[100], *p1, *p2; - int passok = 1, ret = -1; + int r, passok = 1, ret = -1; strlcpy(prompt, "Enter lock password: ", sizeof(prompt)); p1 = read_passphrase(prompt, RP_ALLOW_STDIN); @@ -333,27 +426,31 @@ lock_agent(AuthenticationConnection *ac, int lock) fprintf(stderr, "Passwords do not match.\n"); passok = 0; } - memset(p2, 0, strlen(p2)); - xfree(p2); + explicit_bzero(p2, strlen(p2)); + free(p2); } - if (passok && ssh_lock_agent(ac, lock, p1)) { - fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); - ret = 0; - } else - fprintf(stderr, "Failed to %slock agent.\n", lock ? "" : "un"); - memset(p1, 0, strlen(p1)); - xfree(p1); + if (passok) { + if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) { + fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); + ret = 0; + } else { + fprintf(stderr, "Failed to %slock agent: %s\n", + lock ? "" : "un", ssh_err(r)); + } + } + explicit_bzero(p1, strlen(p1)); + free(p1); return (ret); } static int -do_file(AuthenticationConnection *ac, int deleting, char *file) +do_file(int agent_fd, int deleting, int key_only, char *file) { if (deleting) { - if (delete_file(ac, file) == -1) + if (delete_file(agent_fd, file, key_only) == -1) return -1; } else { - if (add_file(ac, file) == -1) + if (add_file(agent_fd, file, key_only) == -1) return -1; } return 0; @@ -365,13 +462,15 @@ usage(void) fprintf(stderr, "usage: %s [options] [file ...]\n", __progname); fprintf(stderr, "Options:\n"); fprintf(stderr, " -l List fingerprints of all identities.\n"); + fprintf(stderr, " -E hash Specify hash algorithm used for fingerprints.\n"); fprintf(stderr, " -L List public key parameters of all identities.\n"); + fprintf(stderr, " -k Load only keys and not certificates.\n"); + fprintf(stderr, " -c Require confirmation to sign using identities\n"); + fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n"); fprintf(stderr, " -d Delete identity.\n"); fprintf(stderr, " -D Delete all identities.\n"); fprintf(stderr, " -x Lock agent.\n"); fprintf(stderr, " -X Unlock agent.\n"); - fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n"); - fprintf(stderr, " -c Require confirmation to sign using identities\n"); fprintf(stderr, " -s pkcs11 Add keys from PKCS#11 provider.\n"); fprintf(stderr, " -e pkcs11 Remove keys provided by PKCS#11 provider.\n"); } @@ -381,9 +480,11 @@ main(int argc, char **argv) { extern char *optarg; extern int optind; - AuthenticationConnection *ac = NULL; + int agent_fd; char *pkcs11provider = NULL; - int i, ch, deleting = 0, ret = 0; + int r, i, ch, deleting = 0, ret = 0, key_only = 0; + int xflag = 0, lflag = 0, Dflag = 0; + #ifdef WIN32_FIXME @@ -403,27 +504,47 @@ main(int argc, char **argv) __progname = ssh_get_progname(argv[0]); seed_rng(); +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); +#endif - /* At first, get a connection to the authentication agent. */ - ac = ssh_get_authentication_connection(); - if (ac == NULL) { - fprintf(stderr, - "Could not open a connection to your authentication agent.\n"); + setvbuf(stdout, NULL, _IOLBF, 0); + + /* First, get a connection to the authentication agent. */ + switch (r = ssh_get_authentication_socket(&agent_fd)) { + case 0: + break; + case SSH_ERR_AGENT_NOT_PRESENT: + fprintf(stderr, "Could not open a connection to your " + "authentication agent.\n"); + exit(2); + default: + fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r)); exit(2); } - while ((ch = getopt(argc, argv, "lLcdDxXe:s:t:")) != -1) { + + while ((ch = getopt(argc, argv, "klLcdDxXE:e:s:t:")) != -1) { switch (ch) { + case 'E': + fingerprint_hash = ssh_digest_alg_by_name(optarg); + if (fingerprint_hash == -1) + fatal("Invalid hash algorithm \"%s\"", optarg); + break; + case 'k': + key_only = 1; + break; case 'l': case 'L': - if (list_identities(ac, ch == 'l' ? 1 : 0) == -1) - ret = 1; - goto done; + if (lflag != 0) + fatal("-%c flag already specified", lflag); + lflag = ch; + break; case 'x': case 'X': - if (lock_agent(ac, ch == 'x' ? 1 : 0) == -1) - ret = 1; - goto done; + if (xflag != 0) + fatal("-%c flag already specified", xflag); + xflag = ch; + break; case 'c': confirm = 1; break; @@ -431,9 +552,8 @@ main(int argc, char **argv) deleting = 1; break; case 'D': - if (delete_all(ac) == -1) - ret = 1; - goto done; + Dflag = 1; + break; case 's': pkcs11provider = optarg; break; @@ -454,15 +574,32 @@ main(int argc, char **argv) goto done; } } + + if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1) + fatal("Invalid combination of actions"); + else if (xflag) { + if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1) + ret = 1; + goto done; + } else if (lflag) { + if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1) + ret = 1; + goto done; + } else if (Dflag) { + if (delete_all(agent_fd) == -1) + ret = 1; + goto done; + } + argc -= optind; argv += optind; if (pkcs11provider != NULL) { - if (update_card(ac, !deleting, pkcs11provider) == -1) + if (update_card(agent_fd, !deleting, pkcs11provider) == -1) ret = 1; goto done; } if (argc == 0) { - char buf[MAXPATHLEN]; + char buf[PATH_MAX]; struct passwd *pw; struct stat st; int count = 0; @@ -479,7 +616,7 @@ main(int argc, char **argv) default_files[i]); if (stat(buf, &st) < 0) continue; - if (do_file(ac, deleting, buf) == -1) + if (do_file(agent_fd, deleting, key_only, buf) == -1) ret = 1; else count++; @@ -488,13 +625,14 @@ main(int argc, char **argv) ret = 1; } else { for (i = 0; i < argc; i++) { - if (do_file(ac, deleting, argv[i]) == -1) + if (do_file(agent_fd, deleting, key_only, + argv[i]) == -1) ret = 1; } } clear_pass(); done: - ssh_close_authentication_connection(ac); + ssh_close_authentication_socket(agent_fd); return ret; } diff --git a/ssh-agent.c b/ssh-agent.c index 01484b2..1454c29 100644 --- a/ssh-agent.c +++ b/ssh-agent.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-agent.c,v 1.172 2011/06/03 01:37:40 dtucker Exp $ */ +/* $OpenBSD: ssh-agent.c,v 1.204 2015/07/08 20:24:02 markus Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -36,6 +36,7 @@ #include "includes.h" +#include /* MIN MAX */ #include #include #include @@ -49,12 +50,14 @@ #endif #include "openbsd-compat/sys-queue.h" +#ifdef WITH_OPENSSL #include -#include #include "openbsd-compat/openssl-compat.h" +#endif #include #include +#include #ifdef HAVE_PATHS_H # include #endif @@ -65,16 +68,21 @@ #include #include #include +#ifdef HAVE_UTIL_H +# include +#endif #include "xmalloc.h" #include "ssh.h" #include "rsa.h" -#include "buffer.h" -#include "key.h" +#include "sshbuf.h" +#include "sshkey.h" #include "authfd.h" #include "compat.h" #include "log.h" #include "misc.h" +#include "digest.h" +#include "ssherr.h" #ifdef ENABLE_PKCS11 #include "ssh-pkcs11.h" @@ -93,9 +101,9 @@ typedef enum { typedef struct { int fd; sock_type type; - Buffer input; - Buffer output; - Buffer request; + struct sshbuf *input; + struct sshbuf *output; + struct sshbuf *request; } SocketEntry; u_int sockets_alloc = 0; @@ -103,10 +111,10 @@ SocketEntry *sockets = NULL; typedef struct identity { TAILQ_ENTRY(identity) next; - Key *key; + struct sshkey *key; char *comment; char *provider; - u_int death; + time_t death; u_int confirm; } Identity; @@ -122,20 +130,29 @@ int max_fd = 0; /* pid of shell == parent of agent */ pid_t parent_pid = -1; -u_int parent_alive_interval = 0; +time_t parent_alive_interval = 0; + +/* pid of process for which cleanup_socket is applicable */ +pid_t cleanup_pid = 0; /* pathname and directory for AUTH_SOCKET */ -char socket_name[MAXPATHLEN]; -char socket_dir[MAXPATHLEN]; +char socket_name[PATH_MAX]; +char socket_dir[PATH_MAX]; /* locking */ +#define LOCK_SIZE 32 +#define LOCK_SALT_SIZE 16 +#define LOCK_ROUNDS 1 int locked = 0; -char *lock_passwd = NULL; +char lock_passwd[LOCK_SIZE]; +char lock_salt[LOCK_SALT_SIZE]; extern char *__progname; -/* Default lifetime (0 == forever) */ -static int lifetime = 0; +/* Default lifetime in seconds (0 == forever) */ +static long lifetime = 0; + +static int fingerprint_hash = SSH_FP_HASH_DEFAULT; #ifdef WIN32_FIXME @@ -421,15 +438,16 @@ static int lifetime = 0; #endif + static void close_socket(SocketEntry *e) { close(e->fd); e->fd = -1; e->type = AUTH_UNUSED; - buffer_free(&e->input); - buffer_free(&e->output); - buffer_free(&e->request); + sshbuf_free(e->input); + sshbuf_free(e->output); + sshbuf_free(e->request); } static void @@ -455,22 +473,21 @@ idtab_lookup(int version) static void free_identity(Identity *id) { - key_free(id->key); - if (id->provider != NULL) - xfree(id->provider); - xfree(id->comment); - xfree(id); + sshkey_free(id->key); + free(id->provider); + free(id->comment); + free(id); } /* return matching private key for given public key */ static Identity * -lookup_identity(Key *key, int version) +lookup_identity(struct sshkey *key, int version) { Identity *id; Idtab *tab = idtab_lookup(version); TAILQ_FOREACH(id, &tab->idlist, next) { - if (key_equal(key, id->key)) + if (sshkey_equal(key, id->key)) return (id); } return (NULL); @@ -483,46 +500,78 @@ confirm_key(Identity *id) char *p; int ret = -1; - p = key_fingerprint(id->key, SSH_FP_MD5, SSH_FP_HEX); - if (ask_permission("Allow use of key %s?\nKey fingerprint %s.", + p = sshkey_fingerprint(id->key, fingerprint_hash, SSH_FP_DEFAULT); + if (p != NULL && + ask_permission("Allow use of key %s?\nKey fingerprint %s.", id->comment, p)) ret = 0; - xfree(p); + free(p); return (ret); } +static void +send_status(SocketEntry *e, int success) +{ + int r; + + if ((r = sshbuf_put_u32(e->output, 1)) != 0 || + (r = sshbuf_put_u8(e->output, success ? + SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); +} + /* send list of supported public keys to 'client' */ static void process_request_identities(SocketEntry *e, int version) { Idtab *tab = idtab_lookup(version); Identity *id; - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_put_char(&msg, (version == 1) ? - SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER); - buffer_put_int(&msg, tab->nentries); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, (version == 1) ? + SSH_AGENT_RSA_IDENTITIES_ANSWER : + SSH2_AGENT_IDENTITIES_ANSWER)) != 0 || + (r = sshbuf_put_u32(msg, tab->nentries)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); TAILQ_FOREACH(id, &tab->idlist, next) { if (id->key->type == KEY_RSA1) { - buffer_put_int(&msg, BN_num_bits(id->key->rsa->n)); - buffer_put_bignum(&msg, id->key->rsa->e); - buffer_put_bignum(&msg, id->key->rsa->n); +#ifdef WITH_SSH1 + if ((r = sshbuf_put_u32(msg, + BN_num_bits(id->key->rsa->n))) != 0 || + (r = sshbuf_put_bignum1(msg, + id->key->rsa->e)) != 0 || + (r = sshbuf_put_bignum1(msg, + id->key->rsa->n)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); +#endif } else { u_char *blob; - u_int blen; - key_to_blob(id->key, &blob, &blen); - buffer_put_string(&msg, blob, blen); - xfree(blob); + size_t blen; + + if ((r = sshkey_to_blob(id->key, &blob, &blen)) != 0) { + error("%s: sshkey_to_blob: %s", __func__, + ssh_err(r)); + continue; + } + if ((r = sshbuf_put_string(msg, blob, blen)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + free(blob); } - buffer_put_cstring(&msg, id->comment); + if ((r = sshbuf_put_cstring(msg, id->comment)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } - buffer_put_int(&e->output, buffer_len(&msg)); - buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); - buffer_free(&msg); + if ((r = sshbuf_put_stringb(e->output, msg)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_free(msg); } +#ifdef WITH_SSH1 /* ssh1 only */ static void process_authentication_challenge1(SocketEntry *e) @@ -531,138 +580,173 @@ process_authentication_challenge1(SocketEntry *e) u_int response_type; BIGNUM *challenge; Identity *id; - int i, len; - Buffer msg; - MD5_CTX md; - Key *key; + int r, len; + struct sshbuf *msg; + struct ssh_digest_ctx *md; + struct sshkey *key; - buffer_init(&msg); - key = key_new(KEY_RSA1); + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((key = sshkey_new(KEY_RSA1)) == NULL) + fatal("%s: sshkey_new failed", __func__); if ((challenge = BN_new()) == NULL) - fatal("process_authentication_challenge1: BN_new failed"); + fatal("%s: BN_new failed", __func__); - (void) buffer_get_int(&e->request); /* ignored */ - buffer_get_bignum(&e->request, key->rsa->e); - buffer_get_bignum(&e->request, key->rsa->n); - buffer_get_bignum(&e->request, challenge); + if ((r = sshbuf_get_u32(e->request, NULL)) != 0 || /* ignored */ + (r = sshbuf_get_bignum1(e->request, key->rsa->e)) != 0 || + (r = sshbuf_get_bignum1(e->request, key->rsa->n)) != 0 || + (r = sshbuf_get_bignum1(e->request, challenge))) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); /* Only protocol 1.1 is supported */ - if (buffer_len(&e->request) == 0) + if (sshbuf_len(e->request) == 0) goto failure; - buffer_get(&e->request, session_id, 16); - response_type = buffer_get_int(&e->request); + if ((r = sshbuf_get(e->request, session_id, sizeof(session_id))) != 0 || + (r = sshbuf_get_u32(e->request, &response_type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (response_type != 1) goto failure; id = lookup_identity(key, 1); if (id != NULL && (!id->confirm || confirm_key(id) == 0)) { - Key *private = id->key; + struct sshkey *private = id->key; /* Decrypt the challenge using the private key. */ - if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0) - goto failure; + if ((r = rsa_private_decrypt(challenge, challenge, + private->rsa) != 0)) { + fatal("%s: rsa_public_encrypt: %s", __func__, + ssh_err(r)); + goto failure; /* XXX ? */ + } - /* The response is MD5 of decrypted challenge plus session id. */ + /* The response is MD5 of decrypted challenge plus session id */ len = BN_num_bytes(challenge); if (len <= 0 || len > 32) { - logit("process_authentication_challenge: bad challenge length %d", len); + logit("%s: bad challenge length %d", __func__, len); goto failure; } memset(buf, 0, 32); BN_bn2bin(challenge, buf + 32 - len); - MD5_Init(&md); - MD5_Update(&md, buf, 32); - MD5_Update(&md, session_id, 16); - MD5_Final(mdbuf, &md); + if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL || + ssh_digest_update(md, buf, 32) < 0 || + ssh_digest_update(md, session_id, 16) < 0 || + ssh_digest_final(md, mdbuf, sizeof(mdbuf)) < 0) + fatal("%s: md5 failed", __func__); + ssh_digest_free(md); /* Send the response. */ - buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE); - for (i = 0; i < 16; i++) - buffer_put_char(&msg, mdbuf[i]); + if ((r = sshbuf_put_u8(msg, SSH_AGENT_RSA_RESPONSE)) != 0 || + (r = sshbuf_put(msg, mdbuf, sizeof(mdbuf))) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); goto send; } -failure: + failure: /* Unknown identity or protocol error. Send failure. */ - buffer_put_char(&msg, SSH_AGENT_FAILURE); -send: - buffer_put_int(&e->output, buffer_len(&msg)); - buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); - key_free(key); + if ((r = sshbuf_put_u8(msg, SSH_AGENT_FAILURE)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + send: + if ((r = sshbuf_put_stringb(e->output, msg)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshkey_free(key); BN_clear_free(challenge); - buffer_free(&msg); + sshbuf_free(msg); } +#endif /* ssh2 only */ static void process_sign_request2(SocketEntry *e) { u_char *blob, *data, *signature = NULL; - u_int blen, dlen, slen = 0; - extern int datafellows; - int odatafellows; - int ok = -1, flags; - Buffer msg; - Key *key; + size_t blen, dlen, slen = 0; + u_int compat = 0, flags; + int r, ok = -1; + struct sshbuf *msg; + struct sshkey *key; + struct identity *id; - datafellows = 0; - - blob = buffer_get_string(&e->request, &blen); - data = buffer_get_string(&e->request, &dlen); - - flags = buffer_get_int(&e->request); - odatafellows = datafellows; + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_get_string(e->request, &blob, &blen)) != 0 || + (r = sshbuf_get_string(e->request, &data, &dlen)) != 0 || + (r = sshbuf_get_u32(e->request, &flags)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (flags & SSH_AGENT_OLD_SIGNATURE) - datafellows = SSH_BUG_SIGBLOB; - - key = key_from_blob(blob, blen); - if (key != NULL) { - Identity *id = lookup_identity(key, 2); - if (id != NULL && (!id->confirm || confirm_key(id) == 0)) - ok = key_sign(id->key, &signature, &slen, data, dlen); - key_free(key); + compat = SSH_BUG_SIGBLOB; + if ((r = sshkey_from_blob(blob, blen, &key)) != 0) { + error("%s: cannot parse key blob: %s", __func__, ssh_err(ok)); + goto send; } - buffer_init(&msg); + if ((id = lookup_identity(key, 2)) == NULL) { + verbose("%s: %s key not found", __func__, sshkey_type(key)); + goto send; + } + if (id->confirm && confirm_key(id) != 0) { + verbose("%s: user refused key", __func__); + goto send; + } + if ((r = sshkey_sign(id->key, &signature, &slen, + data, dlen, compat)) != 0) { + error("%s: sshkey_sign: %s", __func__, ssh_err(ok)); + goto send; + } + /* Success */ + ok = 0; + send: + sshkey_free(key); if (ok == 0) { - buffer_put_char(&msg, SSH2_AGENT_SIGN_RESPONSE); - buffer_put_string(&msg, signature, slen); - } else { - buffer_put_char(&msg, SSH_AGENT_FAILURE); - } - buffer_put_int(&e->output, buffer_len(&msg)); - buffer_append(&e->output, buffer_ptr(&msg), - buffer_len(&msg)); - buffer_free(&msg); - xfree(data); - xfree(blob); - if (signature != NULL) - xfree(signature); - datafellows = odatafellows; + if ((r = sshbuf_put_u8(msg, SSH2_AGENT_SIGN_RESPONSE)) != 0 || + (r = sshbuf_put_string(msg, signature, slen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + } else if ((r = sshbuf_put_u8(msg, SSH_AGENT_FAILURE)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + + if ((r = sshbuf_put_stringb(e->output, msg)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + + sshbuf_free(msg); + free(data); + free(blob); + free(signature); } /* shared */ static void process_remove_identity(SocketEntry *e, int version) { - u_int blen, bits; - int success = 0; - Key *key = NULL; + size_t blen; + int r, success = 0; + struct sshkey *key = NULL; u_char *blob; +#ifdef WITH_SSH1 + u_int bits; +#endif /* WITH_SSH1 */ switch (version) { +#ifdef WITH_SSH1 case 1: - key = key_new(KEY_RSA1); - bits = buffer_get_int(&e->request); - buffer_get_bignum(&e->request, key->rsa->e); - buffer_get_bignum(&e->request, key->rsa->n); + if ((key = sshkey_new(KEY_RSA1)) == NULL) { + error("%s: sshkey_new failed", __func__); + return; + } + if ((r = sshbuf_get_u32(e->request, &bits)) != 0 || + (r = sshbuf_get_bignum1(e->request, key->rsa->e)) != 0 || + (r = sshbuf_get_bignum1(e->request, key->rsa->n)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - if (bits != key_size(key)) - logit("Warning: identity keysize mismatch: actual %u, announced %u", - key_size(key), bits); + if (bits != sshkey_size(key)) + logit("Warning: identity keysize mismatch: " + "actual %u, announced %u", + sshkey_size(key), bits); break; +#endif /* WITH_SSH1 */ case 2: - blob = buffer_get_string(&e->request, &blen); - key = key_from_blob(blob, blen); - xfree(blob); + if ((r = sshbuf_get_string(e->request, &blob, &blen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if ((r = sshkey_from_blob(blob, blen, &key)) != 0) + error("%s: sshkey_from_blob failed: %s", + __func__, ssh_err(r)); + free(blob); break; } if (key != NULL) { @@ -685,11 +769,9 @@ process_remove_identity(SocketEntry *e, int version) tab->nentries--; success = 1; } - key_free(key); + sshkey_free(key); } - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, - success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); + send_status(e, success); } static void @@ -709,15 +791,14 @@ process_remove_all_identities(SocketEntry *e, int version) tab->nentries = 0; /* Send success. */ - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, SSH_AGENT_SUCCESS); + send_status(e, 1); } /* removes expired keys and returns number of seconds until the next expiry */ -static u_int +static time_t reaper(void) { - u_int deadline = 0, now = time(NULL); + time_t deadline = 0, now = monotime(); Identity *id, *nxt; int version; Idtab *tab; @@ -744,181 +825,109 @@ reaper(void) return (deadline - now); } +/* + * XXX this and the corresponding serialisation function probably belongs + * in key.c + */ +#ifdef WITH_SSH1 +static int +agent_decode_rsa1(struct sshbuf *m, struct sshkey **kp) +{ + struct sshkey *k = NULL; + int r = SSH_ERR_INTERNAL_ERROR; + + *kp = NULL; + if ((k = sshkey_new_private(KEY_RSA1)) == NULL) + return SSH_ERR_ALLOC_FAIL; + + if ((r = sshbuf_get_u32(m, NULL)) != 0 || /* ignored */ + (r = sshbuf_get_bignum1(m, k->rsa->n)) != 0 || + (r = sshbuf_get_bignum1(m, k->rsa->e)) != 0 || + (r = sshbuf_get_bignum1(m, k->rsa->d)) != 0 || + (r = sshbuf_get_bignum1(m, k->rsa->iqmp)) != 0 || + /* SSH1 and SSL have p and q swapped */ + (r = sshbuf_get_bignum1(m, k->rsa->q)) != 0 || /* p */ + (r = sshbuf_get_bignum1(m, k->rsa->p)) != 0) /* q */ + goto out; + + /* Generate additional parameters */ + if ((r = rsa_generate_additional_parameters(k->rsa)) != 0) + goto out; + /* enable blinding */ + if (RSA_blinding_on(k->rsa, NULL) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + + r = 0; /* success */ + out: + if (r == 0) + *kp = k; + else + sshkey_free(k); + return r; +} +#endif /* WITH_SSH1 */ + static void process_add_identity(SocketEntry *e, int version) { Idtab *tab = idtab_lookup(version); Identity *id; - int type, success = 0, death = 0, confirm = 0; - char *type_name, *comment; - Key *k = NULL; -#ifdef OPENSSL_HAS_ECC - BIGNUM *exponent; - EC_POINT *q; - char *curve; -#endif - u_char *cert; - u_int len; + int success = 0, confirm = 0; + u_int seconds; + char *comment = NULL; + time_t death = 0; + struct sshkey *k = NULL; + u_char ctype; + int r = SSH_ERR_INTERNAL_ERROR; switch (version) { +#ifdef WITH_SSH1 case 1: - k = key_new_private(KEY_RSA1); - (void) buffer_get_int(&e->request); /* ignored */ - buffer_get_bignum(&e->request, k->rsa->n); - buffer_get_bignum(&e->request, k->rsa->e); - buffer_get_bignum(&e->request, k->rsa->d); - buffer_get_bignum(&e->request, k->rsa->iqmp); - - /* SSH and SSL have p and q swapped */ - buffer_get_bignum(&e->request, k->rsa->q); /* p */ - buffer_get_bignum(&e->request, k->rsa->p); /* q */ - - /* Generate additional parameters */ - rsa_generate_additional_parameters(k->rsa); + r = agent_decode_rsa1(e->request, &k); break; +#endif /* WITH_SSH1 */ case 2: - type_name = buffer_get_string(&e->request, NULL); - type = key_type_from_name(type_name); - switch (type) { - case KEY_DSA: - k = key_new_private(type); - buffer_get_bignum2(&e->request, k->dsa->p); - buffer_get_bignum2(&e->request, k->dsa->q); - buffer_get_bignum2(&e->request, k->dsa->g); - buffer_get_bignum2(&e->request, k->dsa->pub_key); - buffer_get_bignum2(&e->request, k->dsa->priv_key); - break; - case KEY_DSA_CERT_V00: - case KEY_DSA_CERT: - cert = buffer_get_string(&e->request, &len); - if ((k = key_from_blob(cert, len)) == NULL) - fatal("Certificate parse failed"); - xfree(cert); - key_add_private(k); - buffer_get_bignum2(&e->request, k->dsa->priv_key); - break; -#ifdef OPENSSL_HAS_ECC - case KEY_ECDSA: - k = key_new_private(type); - k->ecdsa_nid = key_ecdsa_nid_from_name(type_name); - curve = buffer_get_string(&e->request, NULL); - if (k->ecdsa_nid != key_curve_name_to_nid(curve)) - fatal("%s: curve names mismatch", __func__); - xfree(curve); - k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid); - if (k->ecdsa == NULL) - fatal("%s: EC_KEY_new_by_curve_name failed", - __func__); - q = EC_POINT_new(EC_KEY_get0_group(k->ecdsa)); - if (q == NULL) - fatal("%s: BN_new failed", __func__); - if ((exponent = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - buffer_get_ecpoint(&e->request, - EC_KEY_get0_group(k->ecdsa), q); - buffer_get_bignum2(&e->request, exponent); - if (EC_KEY_set_public_key(k->ecdsa, q) != 1) - fatal("%s: EC_KEY_set_public_key failed", - __func__); - if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) - fatal("%s: EC_KEY_set_private_key failed", - __func__); - if (key_ec_validate_public(EC_KEY_get0_group(k->ecdsa), - EC_KEY_get0_public_key(k->ecdsa)) != 0) - fatal("%s: bad ECDSA public key", __func__); - if (key_ec_validate_private(k->ecdsa) != 0) - fatal("%s: bad ECDSA private key", __func__); - BN_clear_free(exponent); - EC_POINT_free(q); - break; - case KEY_ECDSA_CERT: - cert = buffer_get_string(&e->request, &len); - if ((k = key_from_blob(cert, len)) == NULL) - fatal("Certificate parse failed"); - xfree(cert); - key_add_private(k); - if ((exponent = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - buffer_get_bignum2(&e->request, exponent); - if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) - fatal("%s: EC_KEY_set_private_key failed", - __func__); - if (key_ec_validate_public(EC_KEY_get0_group(k->ecdsa), - EC_KEY_get0_public_key(k->ecdsa)) != 0 || - key_ec_validate_private(k->ecdsa) != 0) - fatal("%s: bad ECDSA key", __func__); - BN_clear_free(exponent); - break; -#endif /* OPENSSL_HAS_ECC */ - case KEY_RSA: - k = key_new_private(type); - buffer_get_bignum2(&e->request, k->rsa->n); - buffer_get_bignum2(&e->request, k->rsa->e); - buffer_get_bignum2(&e->request, k->rsa->d); - buffer_get_bignum2(&e->request, k->rsa->iqmp); - buffer_get_bignum2(&e->request, k->rsa->p); - buffer_get_bignum2(&e->request, k->rsa->q); + r = sshkey_private_deserialize(e->request, &k); + break; + } + if (r != 0 || k == NULL || + (r = sshbuf_get_cstring(e->request, &comment, NULL)) != 0) { + error("%s: decode private key: %s", __func__, ssh_err(r)); + goto err; + } - /* Generate additional parameters */ - rsa_generate_additional_parameters(k->rsa); - break; - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - cert = buffer_get_string(&e->request, &len); - if ((k = key_from_blob(cert, len)) == NULL) - fatal("Certificate parse failed"); - xfree(cert); - key_add_private(k); - buffer_get_bignum2(&e->request, k->rsa->d); - buffer_get_bignum2(&e->request, k->rsa->iqmp); - buffer_get_bignum2(&e->request, k->rsa->p); - buffer_get_bignum2(&e->request, k->rsa->q); - break; - default: - xfree(type_name); - buffer_clear(&e->request); - goto send; + while (sshbuf_len(e->request)) { + if ((r = sshbuf_get_u8(e->request, &ctype)) != 0) { + error("%s: buffer error: %s", __func__, ssh_err(r)); + goto err; } - xfree(type_name); - break; - } - /* enable blinding */ - switch (k->type) { - case KEY_RSA: - case KEY_RSA_CERT_V00: - case KEY_RSA_CERT: - case KEY_RSA1: - if (RSA_blinding_on(k->rsa, NULL) != 1) { - error("process_add_identity: RSA_blinding_on failed"); - key_free(k); - goto send; - } - break; - } - comment = buffer_get_string(&e->request, NULL); - if (k == NULL) { - xfree(comment); - goto send; - } - while (buffer_len(&e->request)) { - switch ((type = buffer_get_char(&e->request))) { + switch (ctype) { case SSH_AGENT_CONSTRAIN_LIFETIME: - death = time(NULL) + buffer_get_int(&e->request); + if ((r = sshbuf_get_u32(e->request, &seconds)) != 0) { + error("%s: bad lifetime constraint: %s", + __func__, ssh_err(r)); + goto err; + } + death = monotime() + seconds; break; case SSH_AGENT_CONSTRAIN_CONFIRM: confirm = 1; break; default: - error("process_add_identity: " - "Unknown constraint type %d", type); - xfree(comment); - key_free(k); + error("%s: Unknown constraint %d", __func__, ctype); + err: + sshbuf_reset(e->request); + free(comment); + sshkey_free(k); goto send; } } + success = 1; if (lifetime && !death) - death = time(NULL) + lifetime; + death = monotime() + lifetime; if ((id = lookup_identity(k, version)) == NULL) { id = xcalloc(1, sizeof(Identity)); id->key = k; @@ -926,58 +935,79 @@ process_add_identity(SocketEntry *e, int version) /* Increment the number of identities. */ tab->nentries++; } else { - key_free(k); - xfree(id->comment); + sshkey_free(k); + free(id->comment); } id->comment = comment; id->death = death; id->confirm = confirm; send: - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, - success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); + send_status(e, success); } /* XXX todo: encrypt sensitive data with passphrase */ static void process_lock_agent(SocketEntry *e, int lock) { - int success = 0; - char *passwd; + int r, success = 0, delay; + char *passwd, passwdhash[LOCK_SIZE]; + static u_int fail_count = 0; + size_t pwlen; - passwd = buffer_get_string(&e->request, NULL); - if (locked && !lock && strcmp(passwd, lock_passwd) == 0) { - locked = 0; - memset(lock_passwd, 0, strlen(lock_passwd)); - xfree(lock_passwd); - lock_passwd = NULL; - success = 1; + if ((r = sshbuf_get_cstring(e->request, &passwd, &pwlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (pwlen == 0) { + debug("empty password not supported"); + } else if (locked && !lock) { + if (bcrypt_pbkdf(passwd, pwlen, lock_salt, sizeof(lock_salt), + passwdhash, sizeof(passwdhash), LOCK_ROUNDS) < 0) + fatal("bcrypt_pbkdf"); + if (timingsafe_bcmp(passwdhash, lock_passwd, LOCK_SIZE) == 0) { + debug("agent unlocked"); + locked = 0; + fail_count = 0; + explicit_bzero(lock_passwd, sizeof(lock_passwd)); + success = 1; + } else { + /* delay in 0.1s increments up to 10s */ + if (fail_count < 100) + fail_count++; + delay = 100000 * fail_count; + debug("unlock failed, delaying %0.1lf seconds", + (double)delay/1000000); + usleep(delay); + } + explicit_bzero(passwdhash, sizeof(passwdhash)); } else if (!locked && lock) { + debug("agent locked"); locked = 1; - lock_passwd = xstrdup(passwd); + arc4random_buf(lock_salt, sizeof(lock_salt)); + if (bcrypt_pbkdf(passwd, pwlen, lock_salt, sizeof(lock_salt), + lock_passwd, sizeof(lock_passwd), LOCK_ROUNDS) < 0) + fatal("bcrypt_pbkdf"); success = 1; } - memset(passwd, 0, strlen(passwd)); - xfree(passwd); - - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, - success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); + explicit_bzero(passwd, pwlen); + free(passwd); + send_status(e, success); } static void no_identities(SocketEntry *e, u_int type) { - Buffer msg; + struct sshbuf *msg; + int r; - buffer_init(&msg); - buffer_put_char(&msg, + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_u8(msg, (type == SSH_AGENTC_REQUEST_RSA_IDENTITIES) ? - SSH_AGENT_RSA_IDENTITIES_ANSWER : SSH2_AGENT_IDENTITIES_ANSWER); - buffer_put_int(&msg, 0); - buffer_put_int(&e->output, buffer_len(&msg)); - buffer_append(&e->output, buffer_ptr(&msg), buffer_len(&msg)); - buffer_free(&msg); + SSH_AGENT_RSA_IDENTITIES_ANSWER : + SSH2_AGENT_IDENTITIES_ANSWER)) != 0 || + (r = sshbuf_put_u32(msg, 0)) != 0 || + (r = sshbuf_put_stringb(e->output, msg)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_free(msg); } #ifdef ENABLE_PKCS11 @@ -985,18 +1015,27 @@ static void process_add_smartcard_key(SocketEntry *e) { char *provider = NULL, *pin; - int i, type, version, count = 0, success = 0, death = 0, confirm = 0; - Key **keys = NULL, *k; + int r, i, version, count = 0, success = 0, confirm = 0; + u_int seconds; + time_t death = 0; + u_char type; + struct sshkey **keys = NULL, *k; Identity *id; Idtab *tab; - provider = buffer_get_string(&e->request, NULL); - pin = buffer_get_string(&e->request, NULL); + if ((r = sshbuf_get_cstring(e->request, &provider, NULL)) != 0 || + (r = sshbuf_get_cstring(e->request, &pin, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - while (buffer_len(&e->request)) { - switch ((type = buffer_get_char(&e->request))) { + while (sshbuf_len(e->request)) { + if ((r = sshbuf_get_u8(e->request, &type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + switch (type) { case SSH_AGENT_CONSTRAIN_LIFETIME: - death = time(NULL) + buffer_get_int(&e->request); + if ((r = sshbuf_get_u32(e->request, &seconds)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + death = monotime() + seconds; break; case SSH_AGENT_CONSTRAIN_CONFIRM: confirm = 1; @@ -1008,7 +1047,7 @@ process_add_smartcard_key(SocketEntry *e) } } if (lifetime && !death) - death = time(NULL) + lifetime; + death = monotime() + lifetime; count = pkcs11_add_provider(provider, pin, &keys); for (i = 0; i < count; i++) { @@ -1026,38 +1065,37 @@ process_add_smartcard_key(SocketEntry *e) tab->nentries++; success = 1; } else { - key_free(k); + sshkey_free(k); } keys[i] = NULL; } send: - if (pin) - xfree(pin); - if (provider) - xfree(provider); - if (keys) - xfree(keys); - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, - success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); + free(pin); + free(provider); + free(keys); + send_status(e, success); } static void process_remove_smartcard_key(SocketEntry *e) { char *provider = NULL, *pin = NULL; - int version, success = 0; + int r, version, success = 0; Identity *id, *nxt; Idtab *tab; - provider = buffer_get_string(&e->request, NULL); - pin = buffer_get_string(&e->request, NULL); - xfree(pin); + if ((r = sshbuf_get_cstring(e->request, &provider, NULL)) != 0 || + (r = sshbuf_get_cstring(e->request, &pin, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + free(pin); for (version = 1; version < 3; version++) { tab = idtab_lookup(version); for (id = TAILQ_FIRST(&tab->idlist); id; id = nxt) { nxt = TAILQ_NEXT(id, next); + /* Skip file--based keys */ + if (id->provider == NULL) + continue; if (!strcmp(provider, id->provider)) { TAILQ_REMOVE(&tab->idlist, id, next); free_identity(id); @@ -1070,10 +1108,8 @@ process_remove_smartcard_key(SocketEntry *e) else error("process_remove_smartcard_key:" " pkcs11_del_provider failed"); - xfree(provider); - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, - success ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE); + free(provider); + send_status(e, success); } #endif /* ENABLE_PKCS11 */ @@ -1082,30 +1118,31 @@ process_remove_smartcard_key(SocketEntry *e) static void process_message(SocketEntry *e) { - u_int msg_len, type; - u_char *cp; + u_int msg_len; + u_char type; + const u_char *cp; + int r; - if (buffer_len(&e->input) < 5) + if (sshbuf_len(e->input) < 5) return; /* Incomplete message. */ - cp = buffer_ptr(&e->input); - msg_len = get_u32(cp); + cp = sshbuf_ptr(e->input); + msg_len = PEEK_U32(cp); if (msg_len > 256 * 1024) { close_socket(e); return; } - if (buffer_len(&e->input) < msg_len + 4) + if (sshbuf_len(e->input) < msg_len + 4) return; /* move the current input to e->request */ - buffer_consume(&e->input, 4); - buffer_clear(&e->request); - buffer_append(&e->request, buffer_ptr(&e->input), msg_len); - buffer_consume(&e->input, msg_len); - type = buffer_get_char(&e->request); + sshbuf_reset(e->request); + if ((r = sshbuf_get_stringb(e->input, e->request)) != 0 || + (r = sshbuf_get_u8(e->request, &type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); /* check wheter agent is locked */ if (locked && type != SSH_AGENTC_UNLOCK) { - buffer_clear(&e->request); + sshbuf_reset(e->request); switch (type) { case SSH_AGENTC_REQUEST_RSA_IDENTITIES: case SSH2_AGENTC_REQUEST_IDENTITIES: @@ -1114,8 +1151,7 @@ process_message(SocketEntry *e) break; default: /* send a fail message for all other request types */ - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, SSH_AGENT_FAILURE); + send_status(e, 0); } return; } @@ -1126,6 +1162,7 @@ process_message(SocketEntry *e) case SSH_AGENTC_UNLOCK: process_lock_agent(e, type == SSH_AGENTC_LOCK); break; +#ifdef WITH_SSH1 /* ssh1 */ case SSH_AGENTC_RSA_CHALLENGE: process_authentication_challenge1(e); @@ -1140,8 +1177,9 @@ process_message(SocketEntry *e) case SSH_AGENTC_REMOVE_RSA_IDENTITY: process_remove_identity(e, 1); break; +#endif case SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES: - process_remove_all_identities(e, 1); + process_remove_all_identities(e, 1); /* safe for !WITH_SSH1 */ break; /* ssh2 */ case SSH2_AGENTC_SIGN_REQUEST: @@ -1172,9 +1210,8 @@ process_message(SocketEntry *e) default: /* Unknown message. Respond with failure. */ error("Unknown message %d", type); - buffer_clear(&e->request); - buffer_put_int(&e->output, 1); - buffer_put_char(&e->output, SSH_AGENT_FAILURE); + sshbuf_reset(e->request); + send_status(e, 0); break; } } @@ -1192,22 +1229,28 @@ new_socket(sock_type type, int fd) for (i = 0; i < sockets_alloc; i++) if (sockets[i].type == AUTH_UNUSED) { sockets[i].fd = fd; - buffer_init(&sockets[i].input); - buffer_init(&sockets[i].output); - buffer_init(&sockets[i].request); + if ((sockets[i].input = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((sockets[i].output = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((sockets[i].request = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); sockets[i].type = type; return; } old_alloc = sockets_alloc; new_alloc = sockets_alloc + 10; - sockets = xrealloc(sockets, new_alloc, sizeof(sockets[0])); + sockets = xreallocarray(sockets, new_alloc, sizeof(sockets[0])); for (i = old_alloc; i < new_alloc; i++) sockets[i].type = AUTH_UNUSED; sockets_alloc = new_alloc; sockets[old_alloc].fd = fd; - buffer_init(&sockets[old_alloc].input); - buffer_init(&sockets[old_alloc].output); - buffer_init(&sockets[old_alloc].request); + if ((sockets[old_alloc].input = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((sockets[old_alloc].output = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((sockets[old_alloc].request = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); sockets[old_alloc].type = type; } @@ -1215,9 +1258,10 @@ static int prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, u_int *nallocp, struct timeval **tvpp) { - u_int i, sz, deadline; + u_int i, sz; int n = 0; static struct timeval tv; + time_t deadline; for (i = 0; i < sockets_alloc; i++) { switch (sockets[i].type) { @@ -1235,10 +1279,8 @@ prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, u_int *nallocp, sz = howmany(n+1, NFDBITS) * sizeof(fd_mask); if (*fdrp == NULL || sz > *nallocp) { - if (*fdrp) - xfree(*fdrp); - if (*fdwp) - xfree(*fdwp); + free(*fdrp); + free(*fdwp); *fdrp = xmalloc(sz); *fdwp = xmalloc(sz); *nallocp = sz; @@ -1254,7 +1296,7 @@ prepare_select(fd_set **fdrp, fd_set **fdwp, int *fdl, u_int *nallocp, case AUTH_SOCKET: case AUTH_CONNECTION: FD_SET(sockets[i].fd, *fdrp); - if (buffer_len(&sockets[i].output) > 0) + if (sshbuf_len(sockets[i].output) > 0) FD_SET(sockets[i].fd, *fdwp); break; default: @@ -1281,7 +1323,7 @@ after_select(fd_set *readset, fd_set *writeset) struct sockaddr_un sunaddr; socklen_t slen; char buf[1024]; - int len, sock; + int len, sock, r; u_int i, orig_alloc; uid_t euid; gid_t egid; @@ -1292,13 +1334,9 @@ after_select(fd_set *readset, fd_set *writeset) break; case AUTH_SOCKET: if (FD_ISSET(sockets[i].fd, readset)) { - - #ifdef WIN32_FIXME - + #ifdef WIN32_FIXME sunaddr.sun_family = AF_UNIX; - #endif - slen = sizeof(sunaddr); sock = accept(sockets[i].fd, (struct sockaddr *)&sunaddr, &slen); @@ -1324,11 +1362,11 @@ after_select(fd_set *readset, fd_set *writeset) } break; case AUTH_CONNECTION: - if (buffer_len(&sockets[i].output) > 0 && + if (sshbuf_len(sockets[i].output) > 0 && FD_ISSET(sockets[i].fd, writeset)) { len = write(sockets[i].fd, - buffer_ptr(&sockets[i].output), - buffer_len(&sockets[i].output)); + sshbuf_ptr(sockets[i].output), + sshbuf_len(sockets[i].output)); if (len == -1 && (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)) @@ -1337,7 +1375,10 @@ after_select(fd_set *readset, fd_set *writeset) close_socket(&sockets[i]); break; } - buffer_consume(&sockets[i].output, len); + if ((r = sshbuf_consume(sockets[i].output, + len)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); } if (FD_ISSET(sockets[i].fd, readset)) { len = read(sockets[i].fd, buf, sizeof(buf)); @@ -1349,7 +1390,11 @@ after_select(fd_set *readset, fd_set *writeset) close_socket(&sockets[i]); break; } - buffer_append(&sockets[i].input, buf, len); + if ((r = sshbuf_put(sockets[i].input, + buf, len)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + explicit_bzero(buf, sizeof(buf)); process_message(&sockets[i]); } break; @@ -1368,7 +1413,9 @@ cleanup_socket(void) CleanUpSocketFiles(); #endif - + if (cleanup_pid != 0 && getpid() != cleanup_pid) + return; + debug("%s: cleanup", __func__); if (socket_name[0]) unlink(socket_name); if (socket_dir[0]) @@ -1412,38 +1459,31 @@ check_parent_exists(void) static void usage(void) { - fprintf(stderr, "usage: %s [options] [command [arg ...]]\n", - __progname); - fprintf(stderr, "Options:\n"); - fprintf(stderr, " -c Generate C-shell commands on stdout.\n"); - fprintf(stderr, " -s Generate Bourne shell commands on stdout.\n"); - fprintf(stderr, " -k Kill the current agent.\n"); - fprintf(stderr, " -d Debug mode.\n"); - fprintf(stderr, " -a socket Bind agent socket to given name.\n"); - fprintf(stderr, " -t life Default identity lifetime (seconds).\n"); + fprintf(stderr, + "usage: ssh-agent [-c | -s] [-Dd] [-a bind_address] [-E fingerprint_hash]\n" + " [-t life] [command [arg ...]]\n" + " ssh-agent [-c | -s] -k\n"); exit(1); } int main(int ac, char **av) { - int c_flag = 0, d_flag = 0, k_flag = 0, s_flag = 0; + int c_flag = 0, d_flag = 0, D_flag = 0, k_flag = 0, s_flag = 0; int sock, fd, ch, result, saved_errno; u_int nalloc; char *shell, *format, *pidstr, *agentsocket = NULL; fd_set *readsetp = NULL, *writesetp = NULL; - struct sockaddr_un sunaddr; #ifdef HAVE_SETRLIMIT struct rlimit rlim; #endif - int prev_mask; extern int optind; extern char *optarg; pid_t pid; char pidstrbuf[1 + 3 * sizeof pid]; struct timeval *tvp = NULL; size_t len; - + mode_t prev_mask; #ifdef WIN32_FIXME /* @@ -1477,6 +1517,8 @@ main(int ac, char **av) #endif + + /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ sanitise_stdfd(); @@ -1489,13 +1531,20 @@ main(int ac, char **av) prctl(PR_SET_DUMPABLE, 0); #endif +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); +#endif __progname = ssh_get_progname(av[0]); seed_rng(); - while ((ch = getopt(ac, av, "cdksa:t:f")) != -1) { + while ((ch = getopt(ac, av, "cDdksE:a:t:f")) != -1) { // PRAGMA:TODO switch (ch) { + case 'E': + fingerprint_hash = ssh_digest_alg_by_name(optarg); + if (fingerprint_hash == -1) + fatal("Invalid hash algorithm \"%s\"", optarg); + break; case 'c': if (s_flag) usage(); @@ -1510,10 +1559,15 @@ main(int ac, char **av) s_flag++; break; case 'd': - if (d_flag) + if (d_flag || D_flag) usage(); d_flag++; break; + case 'D': + if (d_flag || D_flag) + usage(); + D_flag++; + break; case 'a': agentsocket = optarg; break; @@ -1523,7 +1577,6 @@ main(int ac, char **av) usage(); } break; - #ifdef WIN32_FIXME /* @@ -1542,7 +1595,6 @@ main(int ac, char **av) } #endif - default: usage(); } @@ -1550,12 +1602,11 @@ main(int ac, char **av) ac -= optind; av += optind; - if (ac > 0 && (c_flag || k_flag || s_flag || d_flag - #ifdef WIN32_FIXME + if (ac > 0 && (c_flag || k_flag || s_flag || d_flag || D_flag + #ifdef WIN32_FIXME || f_flag - #endif - )) - + #endif + )) usage(); if (ac == 0 && !c_flag && !s_flag) { @@ -1605,8 +1656,7 @@ main(int ac, char **av) snprintf(socket_name, sizeof socket_name, "%s/agent-%d.%d", socket_dir, rand(), parent_pid); -#else - +#else /* Create private directory for agent socket */ mktemp_proto(socket_dir, sizeof(socket_dir)); if (mkdtemp(socket_dir) == NULL) { @@ -1626,7 +1676,6 @@ main(int ac, char **av) * Create socket early so it will exist before command gets run from * the parent. */ - #ifdef WIN32_FIXME /* @@ -1641,36 +1690,19 @@ main(int ac, char **av) { #endif /* !WIN32_FIXME */ - - sock = socket(AF_UNIX, SOCK_STREAM, 0); - + prev_mask = umask(0177); + sock = unix_listener(socket_name, SSH_LISTEN_BACKLOG, 0); #ifdef WIN32_FIXME Socket = sock; #endif /* !WIN32_FIXME */ - if (sock < 0) { - perror("socket"); + /* XXX - unix_listener() calls error() not perror() */ *socket_name = '\0'; /* Don't unlink any existing file */ cleanup_exit(1); } - memset(&sunaddr, 0, sizeof(sunaddr)); - sunaddr.sun_family = AF_UNIX; - strlcpy(sunaddr.sun_path, socket_name, sizeof(sunaddr.sun_path)); - prev_mask = umask(0177); - if (bind(sock, (struct sockaddr *) &sunaddr, sizeof(sunaddr)) < 0) { - perror("bind"); - *socket_name = '\0'; /* Don't unlink any existing file */ - umask(prev_mask); - cleanup_exit(1); - } umask(prev_mask); - if (listen(sock, SSH_LISTEN_BACKLOG) < 0) { - perror("listen"); - cleanup_exit(1); - } - #ifdef WIN32_FIXME } #endif @@ -1679,15 +1711,15 @@ main(int ac, char **av) * Fork, and have the parent execute the command, if any, or present * the socket data. The child continues as the authentication agent. */ - if (d_flag) { - log_init(__progname, SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 1); - -#ifdef WIN32_FIXME + if (D_flag || d_flag) { + log_init(__progname, + d_flag ? SYSLOG_LEVEL_DEBUG3 : SYSLOG_LEVEL_INFO, + SYSLOG_FACILITY_AUTH, 1); + #ifdef WIN32_FIXME format = c_flag ? "setenv %s %s;\n" : "set %s=%s\n"; #else format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; #endif - printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, SSH_AUTHSOCKET_ENV_NAME); printf("echo Agent pid %ld;\n", (long)parent_pid); @@ -1702,13 +1734,12 @@ main(int ac, char **av) close(sock); snprintf(pidstrbuf, sizeof pidstrbuf, "%ld", (long)pid); if (ac == 0) { - -#ifdef WIN32_FIXME + #ifdef WIN32_FIXME format = c_flag ? "setenv %s %s;\n" : "set %s=%s\n"; #else format = c_flag ? "setenv %s %s;\n" : "%s=%s; export %s;\n"; #endif - + printf(format, SSH_AUTHSOCKET_ENV_NAME, socket_name, SSH_AUTHSOCKET_ENV_NAME); printf(format, SSH_AGENTPID_ENV_NAME, pidstrbuf, @@ -1721,19 +1752,16 @@ main(int ac, char **av) perror("setenv"); exit(1); } - #ifdef WIN32_FIXME _execvp((const char *) av[0], (const char **) av); #else execvp(av[0], av); #endif - perror(av[0]); exit(1); } /* child */ log_init(__progname, SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_AUTH, 0); - #ifndef WIN32_FIXME if (setsid() == -1) { error("setsid: %s", strerror(errno)); @@ -1762,6 +1790,8 @@ main(int ac, char **av) skip: + cleanup_pid = getpid(); + #ifdef ENABLE_PKCS11 pkcs11_init(0); #endif @@ -1769,15 +1799,12 @@ skip: if (ac > 0) parent_alive_interval = 10; idtab_init(); - #ifndef WIN32_FIXME - if (!d_flag) - signal(SIGINT, SIG_IGN); signal(SIGPIPE, SIG_IGN); + signal(SIGINT, (d_flag | D_flag) ? cleanup_handler : SIG_IGN); signal(SIGHUP, cleanup_handler); signal(SIGTERM, cleanup_handler); #endif - nalloc = 0; while (1) { diff --git a/ssh-dss.c b/ssh-dss.c index ede5e21..8ed19d8 100644 --- a/ssh-dss.c +++ b/ssh-dss.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-dss.c,v 1.27 2010/08/31 09:58:37 djm Exp $ */ +/* $OpenBSD: ssh-dss.c,v 1.32 2014/06/24 01:13:21 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -25,163 +25,198 @@ #include "includes.h" +#ifdef WITH_OPENSSL + #include #include +#include #include #include #include -#include "xmalloc.h" -#include "buffer.h" +#include "sshbuf.h" #include "compat.h" -#include "log.h" -#include "key.h" +#include "ssherr.h" +#include "digest.h" +#define SSHKEY_INTERNAL +#include "sshkey.h" #define INTBLOB_LEN 20 #define SIGBLOB_LEN (2*INTBLOB_LEN) int -ssh_dss_sign(const Key *key, u_char **sigp, u_int *lenp, - const u_char *data, u_int datalen) +ssh_dss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) { - DSA_SIG *sig; - const EVP_MD *evp_md = EVP_sha1(); - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE], sigblob[SIGBLOB_LEN]; - u_int rlen, slen, len, dlen; - Buffer b; + DSA_SIG *sig = NULL; + u_char digest[SSH_DIGEST_MAX_LENGTH], sigblob[SIGBLOB_LEN]; + size_t rlen, slen, len, dlen = ssh_digest_bytes(SSH_DIGEST_SHA1); + struct sshbuf *b = NULL; + int ret = SSH_ERR_INVALID_ARGUMENT; - if (key == NULL || key->dsa == NULL || (key->type != KEY_DSA && - key->type != KEY_DSA_CERT && key->type != KEY_DSA_CERT_V00)) { - error("ssh_dss_sign: no DSA key"); - return -1; - } - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); + if (lenp != NULL) + *lenp = 0; + if (sigp != NULL) + *sigp = NULL; - sig = DSA_do_sign(digest, dlen, key->dsa); - memset(digest, 'd', sizeof(digest)); + if (key == NULL || key->dsa == NULL || + sshkey_type_plain(key->type) != KEY_DSA) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen == 0) + return SSH_ERR_INTERNAL_ERROR; - if (sig == NULL) { - error("ssh_dss_sign: sign failed"); - return -1; + if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen, + digest, sizeof(digest))) != 0) + goto out; + + if ((sig = DSA_do_sign(digest, dlen, key->dsa)) == NULL) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; } rlen = BN_num_bytes(sig->r); slen = BN_num_bytes(sig->s); if (rlen > INTBLOB_LEN || slen > INTBLOB_LEN) { - error("bad sig size %u %u", rlen, slen); - DSA_SIG_free(sig); - return -1; + ret = SSH_ERR_INTERNAL_ERROR; + goto out; } - memset(sigblob, 0, SIGBLOB_LEN); - BN_bn2bin(sig->r, sigblob+ SIGBLOB_LEN - INTBLOB_LEN - rlen); - BN_bn2bin(sig->s, sigblob+ SIGBLOB_LEN - slen); - DSA_SIG_free(sig); + explicit_bzero(sigblob, SIGBLOB_LEN); + BN_bn2bin(sig->r, sigblob + SIGBLOB_LEN - INTBLOB_LEN - rlen); + BN_bn2bin(sig->s, sigblob + SIGBLOB_LEN - slen); - if (datafellows & SSH_BUG_SIGBLOB) { - if (lenp != NULL) - *lenp = SIGBLOB_LEN; + if (compat & SSH_BUG_SIGBLOB) { if (sigp != NULL) { - *sigp = xmalloc(SIGBLOB_LEN); + if ((*sigp = malloc(SIGBLOB_LEN)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } memcpy(*sigp, sigblob, SIGBLOB_LEN); } + if (lenp != NULL) + *lenp = SIGBLOB_LEN; + ret = 0; } else { /* ietf-drafts */ - buffer_init(&b); - buffer_put_cstring(&b, "ssh-dss"); - buffer_put_string(&b, sigblob, SIGBLOB_LEN); - len = buffer_len(&b); + if ((b = sshbuf_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((ret = sshbuf_put_cstring(b, "ssh-dss")) != 0 || + (ret = sshbuf_put_string(b, sigblob, SIGBLOB_LEN)) != 0) + goto out; + len = sshbuf_len(b); + if (sigp != NULL) { + if ((*sigp = malloc(len)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(*sigp, sshbuf_ptr(b), len); + } if (lenp != NULL) *lenp = len; - if (sigp != NULL) { - *sigp = xmalloc(len); - memcpy(*sigp, buffer_ptr(&b), len); - } - buffer_free(&b); + ret = 0; } - return 0; + out: + explicit_bzero(digest, sizeof(digest)); + if (sig != NULL) + DSA_SIG_free(sig); + if (b != NULL) + sshbuf_free(b); + return ret; } -int -ssh_dss_verify(const Key *key, const u_char *signature, u_int signaturelen, - const u_char *data, u_int datalen) -{ - DSA_SIG *sig; - const EVP_MD *evp_md = EVP_sha1(); - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE], *sigblob; - u_int len, dlen; - int rlen, ret; - Buffer b; - if (key == NULL || key->dsa == NULL || (key->type != KEY_DSA && - key->type != KEY_DSA_CERT && key->type != KEY_DSA_CERT_V00)) { - error("ssh_dss_verify: no DSA key"); - return -1; - } +int +ssh_dss_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat) +{ + DSA_SIG *sig = NULL; + u_char digest[SSH_DIGEST_MAX_LENGTH], *sigblob = NULL; + size_t len, dlen = ssh_digest_bytes(SSH_DIGEST_SHA1); + int ret = SSH_ERR_INTERNAL_ERROR; + struct sshbuf *b = NULL; + char *ktype = NULL; + + if (key == NULL || key->dsa == NULL || + sshkey_type_plain(key->type) != KEY_DSA) + return SSH_ERR_INVALID_ARGUMENT; + if (dlen == 0) + return SSH_ERR_INTERNAL_ERROR; /* fetch signature */ - if (datafellows & SSH_BUG_SIGBLOB) { - sigblob = xmalloc(signaturelen); + if (compat & SSH_BUG_SIGBLOB) { + if ((sigblob = malloc(signaturelen)) == NULL) + return SSH_ERR_ALLOC_FAIL; memcpy(sigblob, signature, signaturelen); len = signaturelen; } else { /* ietf-drafts */ - char *ktype; - buffer_init(&b); - buffer_append(&b, signature, signaturelen); - ktype = buffer_get_cstring(&b, NULL); - if (strcmp("ssh-dss", ktype) != 0) { - error("ssh_dss_verify: cannot handle type %s", ktype); - buffer_free(&b); - xfree(ktype); - return -1; + if ((b = sshbuf_from(signature, signaturelen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (sshbuf_get_cstring(b, &ktype, NULL) != 0 || + sshbuf_get_string(b, &sigblob, &len) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; } - xfree(ktype); - sigblob = buffer_get_string(&b, &len); - rlen = buffer_len(&b); - buffer_free(&b); - if (rlen != 0) { - error("ssh_dss_verify: " - "remaining bytes in signature %d", rlen); - xfree(sigblob); - return -1; + if (strcmp("ssh-dss", ktype) != 0) { + ret = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (sshbuf_len(b) != 0) { + ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; + goto out; } } if (len != SIGBLOB_LEN) { - fatal("bad sigbloblen %u != SIGBLOB_LEN", len); + ret = SSH_ERR_INVALID_FORMAT; + goto out; } /* parse signature */ - if ((sig = DSA_SIG_new()) == NULL) - fatal("ssh_dss_verify: DSA_SIG_new failed"); - if ((sig->r = BN_new()) == NULL) - fatal("ssh_dss_verify: BN_new failed"); - if ((sig->s = BN_new()) == NULL) - fatal("ssh_dss_verify: BN_new failed"); + if ((sig = DSA_SIG_new()) == NULL || + (sig->r = BN_new()) == NULL || + (sig->s = BN_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } if ((BN_bin2bn(sigblob, INTBLOB_LEN, sig->r) == NULL) || - (BN_bin2bn(sigblob+ INTBLOB_LEN, INTBLOB_LEN, sig->s) == NULL)) - fatal("ssh_dss_verify: BN_bin2bn failed"); - - /* clean up */ - memset(sigblob, 0, len); - xfree(sigblob); + (BN_bin2bn(sigblob+ INTBLOB_LEN, INTBLOB_LEN, sig->s) == NULL)) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } /* sha1 the data */ - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); + if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen, + digest, sizeof(digest))) != 0) + goto out; - ret = DSA_do_verify(digest, dlen, sig, key->dsa); - memset(digest, 'd', sizeof(digest)); + switch (DSA_do_verify(digest, dlen, sig, key->dsa)) { + case 1: + ret = 0; + break; + case 0: + ret = SSH_ERR_SIGNATURE_INVALID; + goto out; + default: + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } - DSA_SIG_free(sig); - - debug("ssh_dss_verify: signature %s", - ret == 1 ? "correct" : ret == 0 ? "incorrect" : "error"); + out: + explicit_bzero(digest, sizeof(digest)); + if (sig != NULL) + DSA_SIG_free(sig); + if (b != NULL) + sshbuf_free(b); + if (ktype != NULL) + free(ktype); + if (sigblob != NULL) { + explicit_bzero(sigblob, len); + free(sigblob); + } return ret; } +#endif /* WITH_OPENSSL */ diff --git a/ssh-ecdsa.c b/ssh-ecdsa.c index c8276b4..2c76f8b 100644 --- a/ssh-ecdsa.c +++ b/ssh-ecdsa.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-ecdsa.c,v 1.4 2010/09/10 01:04:10 djm Exp $ */ +/* $OpenBSD: ssh-ecdsa.c,v 1.11 2014/06/24 01:13:21 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2010 Damien Miller. All rights reserved. @@ -26,7 +26,7 @@ #include "includes.h" -#ifdef OPENSSL_HAS_ECC +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) #include @@ -37,132 +37,156 @@ #include -#include "xmalloc.h" -#include "buffer.h" -#include "compat.h" -#include "log.h" -#include "key.h" +#include "sshbuf.h" +#include "ssherr.h" +#include "digest.h" +#define SSHKEY_INTERNAL +#include "sshkey.h" +/* ARGSUSED */ int -ssh_ecdsa_sign(const Key *key, u_char **sigp, u_int *lenp, - const u_char *data, u_int datalen) +ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) { - ECDSA_SIG *sig; - const EVP_MD *evp_md; - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE]; - u_int len, dlen; - Buffer b, bb; + ECDSA_SIG *sig = NULL; + int hash_alg; + u_char digest[SSH_DIGEST_MAX_LENGTH]; + size_t len, dlen; + struct sshbuf *b = NULL, *bb = NULL; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (lenp != NULL) + *lenp = 0; + if (sigp != NULL) + *sigp = NULL; if (key == NULL || key->ecdsa == NULL || - (key->type != KEY_ECDSA && key->type != KEY_ECDSA_CERT)) { - error("%s: no ECDSA key", __func__); - return -1; - } - evp_md = key_ec_nid_to_evpmd(key->ecdsa_nid); - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); + sshkey_type_plain(key->type) != KEY_ECDSA) + return SSH_ERR_INVALID_ARGUMENT; - sig = ECDSA_do_sign(digest, dlen, key->ecdsa); - memset(digest, 'd', sizeof(digest)); + if ((hash_alg = sshkey_ec_nid_to_hash_alg(key->ecdsa_nid)) == -1 || + (dlen = ssh_digest_bytes(hash_alg)) == 0) + return SSH_ERR_INTERNAL_ERROR; + if ((ret = ssh_digest_memory(hash_alg, data, datalen, + digest, sizeof(digest))) != 0) + goto out; - if (sig == NULL) { - error("%s: sign failed", __func__); - return -1; + if ((sig = ECDSA_do_sign(digest, dlen, key->ecdsa)) == NULL) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; } - buffer_init(&bb); - buffer_put_bignum2(&bb, sig->r); - buffer_put_bignum2(&bb, sig->s); - ECDSA_SIG_free(sig); - - buffer_init(&b); - buffer_put_cstring(&b, key_ssh_name_plain(key)); - buffer_put_string(&b, buffer_ptr(&bb), buffer_len(&bb)); - buffer_free(&bb); - len = buffer_len(&b); + if ((bb = sshbuf_new()) == NULL || (b = sshbuf_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((ret = sshbuf_put_bignum2(bb, sig->r)) != 0 || + (ret = sshbuf_put_bignum2(bb, sig->s)) != 0) + goto out; + if ((ret = sshbuf_put_cstring(b, sshkey_ssh_name_plain(key))) != 0 || + (ret = sshbuf_put_stringb(b, bb)) != 0) + goto out; + len = sshbuf_len(b); + if (sigp != NULL) { + if ((*sigp = malloc(len)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(*sigp, sshbuf_ptr(b), len); + } if (lenp != NULL) *lenp = len; - if (sigp != NULL) { - *sigp = xmalloc(len); - memcpy(*sigp, buffer_ptr(&b), len); - } - buffer_free(&b); - - return 0; -} -int -ssh_ecdsa_verify(const Key *key, const u_char *signature, u_int signaturelen, - const u_char *data, u_int datalen) -{ - ECDSA_SIG *sig; - const EVP_MD *evp_md; - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE], *sigblob; - u_int len, dlen; - int rlen, ret; - Buffer b, bb; - char *ktype; - - if (key == NULL || key->ecdsa == NULL || - (key->type != KEY_ECDSA && key->type != KEY_ECDSA_CERT)) { - error("%s: no ECDSA key", __func__); - return -1; - } - evp_md = key_ec_nid_to_evpmd(key->ecdsa_nid); - - /* fetch signature */ - buffer_init(&b); - buffer_append(&b, signature, signaturelen); - ktype = buffer_get_string(&b, NULL); - if (strcmp(key_ssh_name_plain(key), ktype) != 0) { - error("%s: cannot handle type %s", __func__, ktype); - buffer_free(&b); - xfree(ktype); - return -1; - } - xfree(ktype); - sigblob = buffer_get_string(&b, &len); - rlen = buffer_len(&b); - buffer_free(&b); - if (rlen != 0) { - error("%s: remaining bytes in signature %d", __func__, rlen); - xfree(sigblob); - return -1; - } - - /* parse signature */ - if ((sig = ECDSA_SIG_new()) == NULL) - fatal("%s: ECDSA_SIG_new failed", __func__); - if ((sig->r = BN_new()) == NULL || - (sig->s = BN_new()) == NULL) - fatal("%s: BN_new failed", __func__); - - buffer_init(&bb); - buffer_append(&bb, sigblob, len); - buffer_get_bignum2(&bb, sig->r); - buffer_get_bignum2(&bb, sig->s); - if (buffer_len(&bb) != 0) - fatal("%s: remaining bytes in inner sigblob", __func__); - - /* clean up */ - memset(sigblob, 0, len); - xfree(sigblob); - - /* hash the data */ - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); - - ret = ECDSA_do_verify(digest, dlen, sig, key->ecdsa); - memset(digest, 'd', sizeof(digest)); - - ECDSA_SIG_free(sig); - - debug("%s: signature %s", __func__, - ret == 1 ? "correct" : ret == 0 ? "incorrect" : "error"); + ret = 0; + out: + explicit_bzero(digest, sizeof(digest)); + if (b != NULL) + sshbuf_free(b); + if (bb != NULL) + sshbuf_free(bb); + if (sig != NULL) + ECDSA_SIG_free(sig); return ret; } -#endif /* OPENSSL_HAS_ECC */ +/* ARGSUSED */ +int +ssh_ecdsa_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat) +{ + ECDSA_SIG *sig = NULL; + int hash_alg; + u_char digest[SSH_DIGEST_MAX_LENGTH]; + size_t dlen; + int ret = SSH_ERR_INTERNAL_ERROR; + struct sshbuf *b = NULL, *sigbuf = NULL; + char *ktype = NULL; + + if (key == NULL || key->ecdsa == NULL || + sshkey_type_plain(key->type) != KEY_ECDSA) + return SSH_ERR_INVALID_ARGUMENT; + + if ((hash_alg = sshkey_ec_nid_to_hash_alg(key->ecdsa_nid)) == -1 || + (dlen = ssh_digest_bytes(hash_alg)) == 0) + return SSH_ERR_INTERNAL_ERROR; + + /* fetch signature */ + if ((b = sshbuf_from(signature, signaturelen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (sshbuf_get_cstring(b, &ktype, NULL) != 0 || + sshbuf_froms(b, &sigbuf) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (strcmp(sshkey_ssh_name_plain(key), ktype) != 0) { + ret = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (sshbuf_len(b) != 0) { + ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; + goto out; + } + + /* parse signature */ + if ((sig = ECDSA_SIG_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (sshbuf_get_bignum2(sigbuf, sig->r) != 0 || + sshbuf_get_bignum2(sigbuf, sig->s) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(sigbuf) != 0) { + ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; + goto out; + } + if ((ret = ssh_digest_memory(hash_alg, data, datalen, + digest, sizeof(digest))) != 0) + goto out; + + switch (ECDSA_do_verify(digest, dlen, sig, key->ecdsa)) { + case 1: + ret = 0; + break; + case 0: + ret = SSH_ERR_SIGNATURE_INVALID; + goto out; + default: + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + + out: + explicit_bzero(digest, sizeof(digest)); + if (sigbuf != NULL) + sshbuf_free(sigbuf); + if (b != NULL) + sshbuf_free(b); + if (sig != NULL) + ECDSA_SIG_free(sig); + free(ktype); + return ret; +} + +#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */ diff --git a/ssh-ed25519.c b/ssh-ed25519.c new file mode 100644 index 0000000..b159ff5 --- /dev/null +++ b/ssh-ed25519.c @@ -0,0 +1,166 @@ +/* $OpenBSD: ssh-ed25519.c,v 1.6 2015/01/15 21:38:50 markus Exp $ */ +/* + * Copyright (c) 2013 Markus Friedl + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include + +#include "crypto_api.h" + +#include +#include + +#include "log.h" +#include "sshbuf.h" +#define SSHKEY_INTERNAL +#include "sshkey.h" +#include "ssherr.h" +#include "ssh.h" + +int +ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) +{ + u_char *sig = NULL; + size_t slen = 0, len; + unsigned long long smlen; + int r, ret; + struct sshbuf *b = NULL; + + if (lenp != NULL) + *lenp = 0; + if (sigp != NULL) + *sigp = NULL; + + if (key == NULL || + sshkey_type_plain(key->type) != KEY_ED25519 || + key->ed25519_sk == NULL || + datalen >= INT_MAX - crypto_sign_ed25519_BYTES) + return SSH_ERR_INVALID_ARGUMENT; + smlen = slen = datalen + crypto_sign_ed25519_BYTES; + if ((sig = malloc(slen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + + if ((ret = crypto_sign_ed25519(sig, &smlen, data, datalen, + key->ed25519_sk)) != 0 || smlen <= datalen) { + r = SSH_ERR_INVALID_ARGUMENT; /* XXX better error? */ + goto out; + } + /* encode signature */ + if ((b = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_put_cstring(b, "ssh-ed25519")) != 0 || + (r = sshbuf_put_string(b, sig, smlen - datalen)) != 0) + goto out; + len = sshbuf_len(b); + if (sigp != NULL) { + if ((*sigp = malloc(len)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(*sigp, sshbuf_ptr(b), len); + } + if (lenp != NULL) + *lenp = len; + /* success */ + r = 0; + out: + sshbuf_free(b); + if (sig != NULL) { + explicit_bzero(sig, slen); + free(sig); + } + + return r; +} + +int +ssh_ed25519_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat) +{ + struct sshbuf *b = NULL; + char *ktype = NULL; + const u_char *sigblob; + u_char *sm = NULL, *m = NULL; + size_t len; + unsigned long long smlen = 0, mlen = 0; + int r, ret; + + if (key == NULL || + sshkey_type_plain(key->type) != KEY_ED25519 || + key->ed25519_pk == NULL || + datalen >= INT_MAX - crypto_sign_ed25519_BYTES) + return SSH_ERR_INVALID_ARGUMENT; + + if ((b = sshbuf_from(signature, signaturelen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_get_cstring(b, &ktype, NULL)) != 0 || + (r = sshbuf_get_string_direct(b, &sigblob, &len)) != 0) + goto out; + if (strcmp("ssh-ed25519", ktype) != 0) { + r = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; + } + if (sshbuf_len(b) != 0) { + r = SSH_ERR_UNEXPECTED_TRAILING_DATA; + goto out; + } + if (len > crypto_sign_ed25519_BYTES) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (datalen >= SIZE_MAX - len) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + smlen = len + datalen; + mlen = smlen; + if ((sm = malloc(smlen)) == NULL || (m = malloc(mlen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(sm, sigblob, len); + memcpy(sm+len, data, datalen); + if ((ret = crypto_sign_ed25519_open(m, &mlen, sm, smlen, + key->ed25519_pk)) != 0) { + debug2("%s: crypto_sign_ed25519_open failed: %d", + __func__, ret); + } + if (ret != 0 || mlen != datalen) { + r = SSH_ERR_SIGNATURE_INVALID; + goto out; + } + /* XXX compare 'm' and 'data' ? */ + /* success */ + r = 0; + out: + if (sm != NULL) { + explicit_bzero(sm, smlen); + free(sm); + } + if (m != NULL) { + explicit_bzero(m, smlen); /* NB mlen may be invalid if r != 0 */ + free(m); + } + sshbuf_free(b); + free(ktype); + return r; +} diff --git a/ssh-gss.h b/ssh-gss.h index c29a1b7..a99d7f0 100644 --- a/ssh-gss.h +++ b/ssh-gss.h @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-gss.h,v 1.10 2007/06/12 08:20:00 djm Exp $ */ +/* $OpenBSD: ssh-gss.h,v 1.11 2014/02/26 20:28:44 djm Exp $ */ /* * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. * @@ -42,12 +42,13 @@ # include # endif -/* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ +/* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ -#ifndef GSS_C_NT_HOSTBASED_SERVICE -#define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name -#endif /* GSS_C_NT_... */ -#endif /* !HEIMDAL */ +# if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE +# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name +# endif /* !HAVE_DECL_GSS_C_NT_... */ + +# endif /* !HEIMDAL */ #endif /* KRB5 */ /* draft-ietf-secsh-gsskeyex-06 */ @@ -103,6 +104,8 @@ void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); void ssh_gssapi_set_oid(Gssctxt *, gss_OID); void ssh_gssapi_supported_oids(gss_OID_set *); ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); +void ssh_gssapi_prepare_supported_oids(void); +OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, diff --git a/ssh-keygen.c b/ssh-keygen.c index 44e6597..daf34f5 100644 --- a/ssh-keygen.c +++ b/ssh-keygen.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-keygen.c,v 1.210 2011/04/18 00:46:05 djm Exp $ */ +/* $OpenBSD: ssh-keygen.c,v 1.277 2015/08/19 23:17:51 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1994 Tatu Ylonen , Espoo, Finland @@ -17,11 +17,12 @@ #include #include #include -#include +#ifdef WITH_OPENSSL #include #include #include "openbsd-compat/openssl-compat.h" +#endif #include #include @@ -35,26 +36,39 @@ #include #include #include +#include #include "xmalloc.h" -#include "key.h" +#include "sshkey.h" #include "rsa.h" #include "authfile.h" #include "uuencode.h" -#include "buffer.h" +#include "sshbuf.h" #include "pathnames.h" #include "log.h" #include "misc.h" #include "match.h" #include "hostfile.h" #include "dns.h" +#include "ssh.h" #include "ssh2.h" +#include "ssherr.h" #include "ssh-pkcs11.h" +#include "atomicio.h" +#include "krl.h" +#include "digest.h" #ifdef WIN32_FIXME #define mkdir(a, b) _mkdir(a) #endif + +#ifdef WITH_OPENSSL +# define DEFAULT_KEY_TYPE_NAME "rsa" +#else +# define DEFAULT_KEY_TYPE_NAME "ed25519" +#endif + /* Number of bits in the RSA/DSA key. This value can be set on the command line. */ #define DEFAULT_BITS 2048 #define DEFAULT_BITS_DSA 1024 @@ -91,6 +105,9 @@ int show_cert = 0; int print_fingerprint = 0; int print_bubblebabble = 0; +/* Hash algorithm to use for fingerprints. */ +int fingerprint_hash = SSH_FP_HASH_DEFAULT; + /* The identity file name, given on the command line or entered by the user. */ char identity_file[1024]; int have_identity = 0; @@ -108,7 +125,7 @@ char *identity_comment = NULL; char *ca_key_path = NULL; /* Certificate serial number */ -long long cert_serial = 0; +unsigned long long cert_serial = 0; /* Key type when certifying */ u_int cert_key_type = SSH2_CERT_TYPE_USER; @@ -151,45 +168,66 @@ char *key_type_name = NULL; /* Load key from this PKCS#11 provider */ char *pkcs11provider = NULL; +/* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */ +int use_new_format = 0; + +/* Cipher for new-format private keys */ +char *new_format_cipher = NULL; + +/* + * Number of KDF rounds to derive new format keys / + * number of primality trials when screening moduli. + */ +int rounds = 0; + /* argv0 */ extern char *__progname; -char hostname[MAXHOSTNAMELEN]; +char hostname[NI_MAXHOST]; +#ifdef WITH_OPENSSL /* moduli.c */ int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); -int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); +int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, + unsigned long); +#endif static void -type_bits_valid(int type, u_int32_t *bitsp) +type_bits_valid(int type, const char *name, u_int32_t *bitsp) { - u_int maxbits; +#ifdef WITH_OPENSSL + u_int maxbits, nid; +#endif - if (type == KEY_UNSPEC) { - fprintf(stderr, "unknown key type %s\n", key_type_name); - exit(1); - } + if (type == KEY_UNSPEC) + fatal("unknown key type %s", key_type_name); if (*bitsp == 0) { +#ifdef WITH_OPENSSL if (type == KEY_DSA) *bitsp = DEFAULT_BITS_DSA; - else if (type == KEY_ECDSA) - *bitsp = DEFAULT_BITS_ECDSA; - else + else if (type == KEY_ECDSA) { + if (name != NULL && + (nid = sshkey_ecdsa_nid_from_name(name)) > 0) + *bitsp = sshkey_curve_nid_to_bits(nid); + if (*bitsp == 0) + *bitsp = DEFAULT_BITS_ECDSA; + } else +#endif *bitsp = DEFAULT_BITS; } +#ifdef WITH_OPENSSL maxbits = (type == KEY_DSA) ? OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; - if (*bitsp > maxbits) { - fprintf(stderr, "key bits exceeds maximum %d\n", maxbits); - exit(1); - } + if (*bitsp > maxbits) + fatal("key bits exceeds maximum %d", maxbits); if (type == KEY_DSA && *bitsp != 1024) fatal("DSA keys must be 1024 bits"); - else if (type != KEY_ECDSA && *bitsp < 768) - fatal("Key must at least be 768 bits"); - else if (type == KEY_ECDSA && key_ecdsa_bits_to_nid(*bitsp) == -1) + else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 1024) + fatal("Key must at least be 1024 bits"); + else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1) fatal("Invalid ECDSA key length - valid lengths are " "256, 384 or 521 bits"); +#endif } static void @@ -201,12 +239,11 @@ ask_filename(struct passwd *pw, const char *prompt) if (key_type_name == NULL) name = _PATH_SSH_CLIENT_ID_RSA; else { - switch (key_type_from_name(key_type_name)) { + switch (sshkey_type_from_name(key_type_name)) { case KEY_RSA1: name = _PATH_SSH_CLIENT_IDENTITY; break; case KEY_DSA_CERT: - case KEY_DSA_CERT_V00: case KEY_DSA: name = _PATH_SSH_CLIENT_ID_DSA; break; @@ -217,18 +254,21 @@ ask_filename(struct passwd *pw, const char *prompt) break; #endif case KEY_RSA_CERT: - case KEY_RSA_CERT_V00: case KEY_RSA: name = _PATH_SSH_CLIENT_ID_RSA; break; - default: - fprintf(stderr, "bad key type\n"); - exit(1); + case KEY_ED25519: + case KEY_ED25519_CERT: + name = _PATH_SSH_CLIENT_ID_ED25519; break; + default: + fatal("bad key type"); } } - snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); - fprintf(stderr, "%s (%s): ", prompt, identity_file); + snprintf(identity_file, sizeof(identity_file), + "%s/%s", pw->pw_dir, name); + printf("%s (%s): ", prompt, identity_file); + fflush(stdout); if (fgets(buf, sizeof(buf), stdin) == NULL) exit(1); buf[strcspn(buf, "\n")] = '\0'; @@ -237,23 +277,26 @@ ask_filename(struct passwd *pw, const char *prompt) have_identity = 1; } -static Key * +static struct sshkey * load_identity(char *filename) { char *pass; - Key *prv; + struct sshkey *prv; + int r; - prv = key_load_private(filename, "", NULL); - if (prv == NULL) { - if (identity_passphrase) - pass = xstrdup(identity_passphrase); - else - pass = read_passphrase("Enter passphrase: ", - RP_ALLOW_STDIN); - prv = key_load_private(filename, pass, NULL); - memset(pass, 0, strlen(pass)); - xfree(pass); - } + if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0) + return prv; + if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) + fatal("Load key \"%s\": %s", filename, ssh_err(r)); + if (identity_passphrase) + pass = xstrdup(identity_passphrase); + else + pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); + r = sshkey_load_private(filename, pass, &prv, NULL); + explicit_bzero(pass, strlen(pass)); + free(pass); + if (r != 0) + fatal("Load key \"%s\": %s", filename, ssh_err(r)); return prv; } @@ -262,36 +305,39 @@ load_identity(char *filename) #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb +#ifdef WITH_OPENSSL static void -do_convert_to_ssh2(struct passwd *pw, Key *k) +do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) { - u_int len; + size_t len; u_char *blob; char comment[61]; + int r; - if (key_to_blob(k, &blob, &len) <= 0) { - fprintf(stderr, "key_to_blob failed\n"); - exit(1); - } + if (k->type == KEY_RSA1) + fatal("version 1 keys are not supported"); + if ((r = sshkey_to_blob(k, &blob, &len)) != 0) + fatal("key_to_blob failed: %s", ssh_err(r)); /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ snprintf(comment, sizeof(comment), "%u-bit %s, converted by %s@%s from OpenSSH", - key_size(k), key_type(k), + sshkey_size(k), sshkey_type(k), pw->pw_name, hostname); fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); fprintf(stdout, "Comment: \"%s\"\n", comment); dump_base64(stdout, blob, len); fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); - key_free(k); - xfree(blob); + sshkey_free(k); + free(blob); exit(0); } static void -do_convert_to_pkcs8(Key *k) +do_convert_to_pkcs8(struct sshkey *k) { - switch (key_type_plain(k->type)) { + switch (sshkey_type_plain(k->type)) { + case KEY_RSA1: case KEY_RSA: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) fatal("PEM_write_RSA_PUBKEY failed"); @@ -307,15 +353,16 @@ do_convert_to_pkcs8(Key *k) break; #endif default: - fatal("%s: unsupported key type %s", __func__, key_type(k)); + fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); } exit(0); } static void -do_convert_to_pem(Key *k) +do_convert_to_pem(struct sshkey *k) { - switch (key_type_plain(k->type)) { + switch (sshkey_type_plain(k->type)) { + case KEY_RSA1: case KEY_RSA: if (!PEM_write_RSAPublicKey(stdout, k->rsa)) fatal("PEM_write_RSAPublicKey failed"); @@ -328,7 +375,7 @@ do_convert_to_pem(Key *k) #endif /* XXX ECDSA? */ default: - fatal("%s: unsupported key type %s", __func__, key_type(k)); + fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); } exit(0); } @@ -336,24 +383,16 @@ do_convert_to_pem(Key *k) static void do_convert_to(struct passwd *pw) { - Key *k; + struct sshkey *k; struct stat st; + int r; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); if (stat(identity_file, &st) < 0) fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - if ((k = key_load_public(identity_file, NULL)) == NULL) { - if ((k = load_identity(identity_file)) == NULL) { - fprintf(stderr, "load failed\n"); - exit(1); - } - } - if (k->type == KEY_RSA1) { - fprintf(stderr, "version 1 keys are not supported\n"); - exit(1); - } - + if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) + k = load_identity(identity_file); switch (convert_format) { case FMT_RFC4716: do_convert_to_ssh2(pw, k); @@ -370,110 +409,132 @@ do_convert_to(struct passwd *pw) exit(0); } +/* + * This is almost exactly the bignum1 encoding, but with 32 bit for length + * instead of 16. + */ static void -buffer_get_bignum_bits(Buffer *b, BIGNUM *value) +buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) { - u_int bignum_bits = buffer_get_int(b); - u_int bytes = (bignum_bits + 7) / 8; + u_int bytes, bignum_bits; + int r; - if (buffer_len(b) < bytes) - fatal("buffer_get_bignum_bits: input buffer too small: " - "need %d have %d", bytes, buffer_len(b)); - if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) - fatal("buffer_get_bignum_bits: BN_bin2bn failed"); - buffer_consume(b, bytes); + if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + bytes = (bignum_bits + 7) / 8; + if (sshbuf_len(b) < bytes) + fatal("%s: input buffer too small: need %d have %zu", + __func__, bytes, sshbuf_len(b)); + if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) + fatal("%s: BN_bin2bn failed", __func__); + if ((r = sshbuf_consume(b, bytes)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } -static Key * +static struct sshkey * do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) { - Buffer b; - Key *key = NULL; + struct sshbuf *b; + struct sshkey *key = NULL; char *type, *cipher; - u_char *sig, data[] = "abcde12345"; - int magic, rlen, ktype, i1, i2, i3, i4; - u_int slen; + u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; + int r, rlen, ktype; + u_int magic, i1, i2, i3, i4; + size_t slen; u_long e; - buffer_init(&b); - buffer_append(&b, blob, blen); + if ((b = sshbuf_from(blob, blen)) == NULL) + fatal("%s: sshbuf_from failed", __func__); + if ((r = sshbuf_get_u32(b, &magic)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - magic = buffer_get_int(&b); if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { - error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); - buffer_free(&b); + error("bad magic 0x%x != 0x%x", magic, + SSH_COM_PRIVATE_KEY_MAGIC); + sshbuf_free(b); return NULL; } - i1 = buffer_get_int(&b); - type = buffer_get_string(&b, NULL); - cipher = buffer_get_string(&b, NULL); - i2 = buffer_get_int(&b); - i3 = buffer_get_int(&b); - i4 = buffer_get_int(&b); + if ((r = sshbuf_get_u32(b, &i1)) != 0 || + (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || + (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || + (r = sshbuf_get_u32(b, &i2)) != 0 || + (r = sshbuf_get_u32(b, &i3)) != 0 || + (r = sshbuf_get_u32(b, &i4)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); debug("ignore (%d %d %d %d)", i1, i2, i3, i4); if (strcmp(cipher, "none") != 0) { error("unsupported cipher %s", cipher); - xfree(cipher); - buffer_free(&b); - xfree(type); + free(cipher); + sshbuf_free(b); + free(type); return NULL; } - xfree(cipher); + free(cipher); if (strstr(type, "dsa")) { ktype = KEY_DSA; } else if (strstr(type, "rsa")) { ktype = KEY_RSA; } else { - buffer_free(&b); - xfree(type); + sshbuf_free(b); + free(type); return NULL; } - key = key_new_private(ktype); - xfree(type); + if ((key = sshkey_new_private(ktype)) == NULL) + fatal("key_new_private failed"); + free(type); switch (key->type) { case KEY_DSA: - buffer_get_bignum_bits(&b, key->dsa->p); - buffer_get_bignum_bits(&b, key->dsa->g); - buffer_get_bignum_bits(&b, key->dsa->q); - buffer_get_bignum_bits(&b, key->dsa->pub_key); - buffer_get_bignum_bits(&b, key->dsa->priv_key); + buffer_get_bignum_bits(b, key->dsa->p); + buffer_get_bignum_bits(b, key->dsa->g); + buffer_get_bignum_bits(b, key->dsa->q); + buffer_get_bignum_bits(b, key->dsa->pub_key); + buffer_get_bignum_bits(b, key->dsa->priv_key); break; case KEY_RSA: - e = buffer_get_char(&b); + if ((r = sshbuf_get_u8(b, &e1)) != 0 || + (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || + (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + e = e1; debug("e %lx", e); if (e < 30) { e <<= 8; - e += buffer_get_char(&b); + e += e2; debug("e %lx", e); e <<= 8; - e += buffer_get_char(&b); + e += e3; debug("e %lx", e); } if (!BN_set_word(key->rsa->e, e)) { - buffer_free(&b); - key_free(key); + sshbuf_free(b); + sshkey_free(key); return NULL; } - buffer_get_bignum_bits(&b, key->rsa->d); - buffer_get_bignum_bits(&b, key->rsa->n); - buffer_get_bignum_bits(&b, key->rsa->iqmp); - buffer_get_bignum_bits(&b, key->rsa->q); - buffer_get_bignum_bits(&b, key->rsa->p); - rsa_generate_additional_parameters(key->rsa); + buffer_get_bignum_bits(b, key->rsa->d); + buffer_get_bignum_bits(b, key->rsa->n); + buffer_get_bignum_bits(b, key->rsa->iqmp); + buffer_get_bignum_bits(b, key->rsa->q); + buffer_get_bignum_bits(b, key->rsa->p); + if ((r = rsa_generate_additional_parameters(key->rsa)) != 0) + fatal("generate RSA parameters failed: %s", ssh_err(r)); break; } - rlen = buffer_len(&b); + rlen = sshbuf_len(b); if (rlen != 0) error("do_convert_private_ssh2_from_blob: " "remaining bytes in key blob %d", rlen); - buffer_free(&b); + sshbuf_free(b); /* try the key */ - key_sign(key, &sig, &slen, data, sizeof(data)); - key_verify(key, sig, slen, data, sizeof(data)); - xfree(sig); + if (sshkey_sign(key, &sig, &slen, data, sizeof(data), 0) != 0 || + sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) { + sshkey_free(key); + free(sig); + return NULL; + } + free(sig); return key; } @@ -485,17 +546,13 @@ get_line(FILE *fp, char *line, size_t len) line[0] = '\0'; while ((c = fgetc(fp)) != EOF) { - if (pos >= len - 1) { - fprintf(stderr, "input line too long.\n"); - exit(1); - } + if (pos >= len - 1) + fatal("input line too long."); switch (c) { case '\r': c = fgetc(fp); - if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { - fprintf(stderr, "unget: %s\n", strerror(errno)); - exit(1); - } + if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) + fatal("unget: %s", strerror(errno)); return pos; case '\n': return pos; @@ -508,21 +565,20 @@ get_line(FILE *fp, char *line, size_t len) } static void -do_convert_from_ssh2(struct passwd *pw, Key **k, int *private) +do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) { - int blen; + int r, blen, escaped = 0; u_int len; char line[1024]; u_char blob[8096]; char encoded[8096]; - int escaped = 0; FILE *fp; if ((fp = fopen(identity_file, "r")) == NULL) fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); encoded[0] = '\0'; while ((blen = get_line(fp, line, sizeof(line))) != -1) { - if (line[blen - 1] == '\\') + if (blen > 0 && line[blen - 1] == '\\') escaped++; if (strncmp(line, "----", 4) == 0 || strstr(line, ": ") != NULL) { @@ -548,22 +604,17 @@ do_convert_from_ssh2(struct passwd *pw, Key **k, int *private) (encoded[len-3] == '=')) encoded[len-3] = '\0'; blen = uudecode(encoded, blob, sizeof(blob)); - if (blen < 0) { - fprintf(stderr, "uudecode failed.\n"); - exit(1); - } - *k = *private ? - do_convert_private_ssh2_from_blob(blob, blen) : - key_from_blob(blob, blen); - if (*k == NULL) { - fprintf(stderr, "decode blob failed.\n"); - exit(1); - } + if (blen < 0) + fatal("uudecode failed."); + if (*private) + *k = do_convert_private_ssh2_from_blob(blob, blen); + else if ((r = sshkey_from_blob(blob, blen, k)) != 0) + fatal("decode blob failed: %s", ssh_err(r)); fclose(fp); } static void -do_convert_from_pkcs8(Key **k, int *private) +do_convert_from_pkcs8(struct sshkey **k, int *private) { EVP_PKEY *pubkey; FILE *fp; @@ -577,21 +628,24 @@ do_convert_from_pkcs8(Key **k, int *private) fclose(fp); switch (EVP_PKEY_type(pubkey->type)) { case EVP_PKEY_RSA: - *k = key_new(KEY_UNSPEC); + if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); (*k)->type = KEY_RSA; (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); break; case EVP_PKEY_DSA: - *k = key_new(KEY_UNSPEC); + if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); (*k)->type = KEY_DSA; (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); break; #ifdef OPENSSL_HAS_ECC case EVP_PKEY_EC: - *k = key_new(KEY_UNSPEC); + if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); (*k)->type = KEY_ECDSA; (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); - (*k)->ecdsa_nid = key_ecdsa_key_to_nid((*k)->ecdsa); + (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); break; #endif default: @@ -603,7 +657,7 @@ do_convert_from_pkcs8(Key **k, int *private) } static void -do_convert_from_pem(Key **k, int *private) +do_convert_from_pem(struct sshkey **k, int *private) { FILE *fp; RSA *rsa; @@ -614,7 +668,8 @@ do_convert_from_pem(Key **k, int *private) if ((fp = fopen(identity_file, "r")) == NULL) fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { - *k = key_new(KEY_UNSPEC); + if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); (*k)->type = KEY_RSA; (*k)->rsa = rsa; fclose(fp); @@ -623,7 +678,8 @@ do_convert_from_pem(Key **k, int *private) #if notyet /* OpenSSH 0.9.8 lacks this function */ rewind(fp); if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { - *k = key_new(KEY_UNSPEC); + if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); (*k)->type = KEY_DSA; (*k)->dsa = dsa; fclose(fp); @@ -637,8 +693,8 @@ do_convert_from_pem(Key **k, int *private) static void do_convert_from(struct passwd *pw) { - Key *k = NULL; - int private = 0, ok = 0; + struct sshkey *k = NULL; + int r, private = 0, ok = 0; struct stat st; if (!have_identity) @@ -660,11 +716,12 @@ do_convert_from(struct passwd *pw) fatal("%s: unknown key format %d", __func__, convert_format); } - if (!private) - ok = key_write(k, stdout); + if (!private) { + if ((r = sshkey_write(k, stdout)) == 0) + ok = 1; if (ok) fprintf(stdout, "\n"); - else { + } else { switch (k->type) { case KEY_DSA: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, @@ -682,38 +739,32 @@ do_convert_from(struct passwd *pw) break; default: fatal("%s: unsupported key type %s", __func__, - key_type(k)); + sshkey_type(k)); } } - if (!ok) { - fprintf(stderr, "key write failed\n"); - exit(1); - } - key_free(k); + if (!ok) + fatal("key write failed"); + sshkey_free(k); exit(0); } +#endif static void do_print_public(struct passwd *pw) { - Key *prv; + struct sshkey *prv; struct stat st; + int r; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } + if (stat(identity_file, &st) < 0) + fatal("%s: %s", identity_file, strerror(errno)); prv = load_identity(identity_file); - if (prv == NULL) { - fprintf(stderr, "load failed\n"); - exit(1); - } - if (!key_write(prv, stdout)) - fprintf(stderr, "key_write failed"); - key_free(prv); + if ((r = sshkey_write(prv, stdout)) != 0) + error("key_write failed: %s", ssh_err(r)); + sshkey_free(prv); fprintf(stdout, "\n"); exit(0); } @@ -722,19 +773,39 @@ static void do_download(struct passwd *pw) { #ifdef ENABLE_PKCS11 - Key **keys = NULL; + struct sshkey **keys = NULL; int i, nkeys; + enum sshkey_fp_rep rep; + int fptype; + char *fp, *ra; + + fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; + rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; pkcs11_init(0); nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); if (nkeys <= 0) fatal("cannot read public key from pkcs11"); for (i = 0; i < nkeys; i++) { - key_write(keys[i], stdout); - key_free(keys[i]); - fprintf(stdout, "\n"); + if (print_fingerprint) { + fp = sshkey_fingerprint(keys[i], fptype, rep); + ra = sshkey_fingerprint(keys[i], fingerprint_hash, + SSH_FP_RANDOMART); + if (fp == NULL || ra == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); + printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), + fp, sshkey_type(keys[i])); + if (log_level >= SYSLOG_LEVEL_VERBOSE) + printf("%s\n", ra); + free(ra); + free(fp); + } else { + (void) sshkey_write(keys[i], stdout); /* XXX check */ + fprintf(stdout, "\n"); + } + sshkey_free(keys[i]); } - xfree(keys); + free(keys); pkcs11_terminate(); exit(0); #else @@ -746,38 +817,40 @@ static void do_fingerprint(struct passwd *pw) { FILE *f; - Key *public; + struct sshkey *public; char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; - int i, skip = 0, num = 0, invalid = 1; - enum fp_rep rep; - enum fp_type fptype; + int r, i, skip = 0, num = 0, invalid = 1; + enum sshkey_fp_rep rep; + int fptype; struct stat st; - fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; - rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; - + fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; + rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - public = key_load_public(identity_file, &comment); - if (public != NULL) { - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, comment, - key_type(public)); + if (stat(identity_file, &st) < 0) + fatal("%s: %s", identity_file, strerror(errno)); + if ((r = sshkey_load_public(identity_file, &public, &comment)) != 0) + debug2("Error loading public key \"%s\": %s", + identity_file, ssh_err(r)); + else { + fp = sshkey_fingerprint(public, fptype, rep); + ra = sshkey_fingerprint(public, fingerprint_hash, + SSH_FP_RANDOMART); + if (fp == NULL || ra == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); + printf("%u %s %s (%s)\n", sshkey_size(public), fp, comment, + sshkey_type(public)); if (log_level >= SYSLOG_LEVEL_VERBOSE) printf("%s\n", ra); - key_free(public); - xfree(comment); - xfree(ra); - xfree(fp); + sshkey_free(public); + free(comment); + free(ra); + free(fp); exit(0); } if (comment) { - xfree(comment); + free(comment); comment = NULL; } @@ -819,34 +892,37 @@ do_fingerprint(struct passwd *pw) *cp++ = '\0'; } ep = cp; - public = key_new(KEY_RSA1); - if (key_read(public, &cp) != 1) { + if ((public = sshkey_new(KEY_RSA1)) == NULL) + fatal("sshkey_new failed"); + if ((r = sshkey_read(public, &cp)) != 0) { cp = ep; - key_free(public); - public = key_new(KEY_UNSPEC); - if (key_read(public, &cp) != 1) { - key_free(public); + sshkey_free(public); + if ((public = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("sshkey_new failed"); + if ((r = sshkey_read(public, &cp)) != 0) { + sshkey_free(public); continue; } } comment = *cp ? cp : comment; - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, - comment ? comment : "no comment", key_type(public)); + fp = sshkey_fingerprint(public, fptype, rep); + ra = sshkey_fingerprint(public, fingerprint_hash, + SSH_FP_RANDOMART); + if (fp == NULL || ra == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); + printf("%u %s %s (%s)\n", sshkey_size(public), fp, + comment ? comment : "no comment", sshkey_type(public)); if (log_level >= SYSLOG_LEVEL_VERBOSE) printf("%s\n", ra); - xfree(ra); - xfree(fp); - key_free(public); + free(ra); + free(fp); + sshkey_free(public); invalid = 0; } fclose(f); - if (invalid) { - printf("%s is not a public key file.\n", identity_file); - exit(1); - } + if (invalid) + fatal("%s is not a public key file.", identity_file); exit(0); } @@ -858,25 +934,32 @@ do_gen_all_hostkeys(struct passwd *pw) char *key_type_display; char *path; } key_types[] = { +#ifdef WITH_OPENSSL +#ifdef WITH_SSH1 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE }, +#endif /* WITH_SSH1 */ { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, +#ifdef OPENSSL_HAS_ECC { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, +#endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, { NULL, NULL, NULL } }; int first = 0; struct stat st; - Key *private, *public; + struct sshkey *private, *public; char comment[1024]; - int i, type, fd; + int i, type, fd, r; FILE *f; for (i = 0; key_types[i].key_type; i++) { if (stat(key_types[i].path, &st) == 0) continue; if (errno != ENOENT) { - printf("Could not stat %s: %s", key_types[i].path, + error("Could not stat %s: %s", key_types[i].path, strerror(errno)); first = 0; continue; @@ -888,92 +971,182 @@ do_gen_all_hostkeys(struct passwd *pw) } printf("%s ", key_types[i].key_type_display); fflush(stdout); - arc4random_stir(); - type = key_type_from_name(key_types[i].key_type); + type = sshkey_type_from_name(key_types[i].key_type); strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); bits = 0; - type_bits_valid(type, &bits); - private = key_generate(type, bits); - if (private == NULL) { - fprintf(stderr, "key_generate failed\n"); + type_bits_valid(type, NULL, &bits); + if ((r = sshkey_generate(type, bits, &private)) != 0) { + error("key_generate failed: %s", ssh_err(r)); first = 0; continue; } - public = key_from_private(private); + if ((r = sshkey_from_private(private, &public)) != 0) + fatal("sshkey_from_private failed: %s", ssh_err(r)); snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); - if (!key_save_private(private, identity_file, "", comment)) { - printf("Saving the key failed: %s.\n", identity_file); - key_free(private); - key_free(public); + if ((r = sshkey_save_private(private, identity_file, "", + comment, use_new_format, new_format_cipher, rounds)) != 0) { + error("Saving key \"%s\" failed: %s", + identity_file, ssh_err(r)); + sshkey_free(private); + sshkey_free(public); first = 0; continue; } - key_free(private); - arc4random_stir(); + sshkey_free(private); strlcat(identity_file, ".pub", sizeof(identity_file)); fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (fd == -1) { - printf("Could not save your public key in %s\n", + error("Could not save your public key in %s", identity_file); - key_free(public); + sshkey_free(public); first = 0; continue; } f = fdopen(fd, "w"); if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - key_free(public); + error("fdopen %s failed", identity_file); + close(fd); + sshkey_free(public); first = 0; continue; } - if (!key_write(public, f)) { - fprintf(stderr, "write key failed\n"); - key_free(public); + if ((r = sshkey_write(public, f)) != 0) { + error("write key failed: %s", ssh_err(r)); + fclose(f); + sshkey_free(public); first = 0; continue; } fprintf(f, " %s\n", comment); fclose(f); - key_free(public); + sshkey_free(public); } if (first != 0) printf("\n"); } -static void -printhost(FILE *f, const char *name, Key *public, int ca, int hash) -{ - if (print_fingerprint) { - enum fp_rep rep; - enum fp_type fptype; - char *fp, *ra; +struct known_hosts_ctx { + const char *host; /* Hostname searched for in find/delete case */ + FILE *out; /* Output file, stdout for find_hosts case */ + int has_unhashed; /* When hashing, original had unhashed hosts */ + int found_key; /* For find/delete, host was found */ + int invalid; /* File contained invalid items; don't delete */ +}; - fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; - rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, name, - key_type(public)); - if (log_level >= SYSLOG_LEVEL_VERBOSE) - printf("%s\n", ra); - xfree(ra); - xfree(fp); - } else { - if (hash && (name = host_hash(name, NULL, 0)) == NULL) - fatal("hash_host failed"); - fprintf(f, "%s%s%s ", ca ? CA_MARKER : "", ca ? " " : "", name); - if (!key_write(public, f)) - fatal("key_write failed"); - fprintf(f, "\n"); +static int +known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) +{ + struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; + char *hashed, *cp, *hosts, *ohosts; + int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); + + switch (l->status) { + case HKF_STATUS_OK: + case HKF_STATUS_MATCHED: + /* + * Don't hash hosts already already hashed, with wildcard + * characters or a CA/revocation marker. + */ + if ((l->match & HKF_MATCH_HOST_HASHED) != 0 || + has_wild || l->marker != MRK_NONE) { + fprintf(ctx->out, "%s\n", l->line); + if (has_wild && !find_host) { + logit("%s:%ld: ignoring host name " + "with wildcard: %.64s", l->path, + l->linenum, l->hosts); + } + return 0; + } + /* + * Split any comma-separated hostnames from the host list, + * hash and store separately. + */ + ohosts = hosts = xstrdup(l->hosts); + while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { + if ((hashed = host_hash(cp, NULL, 0)) == NULL) + fatal("hash_host failed"); + fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); + ctx->has_unhashed = 1; + } + free(ohosts); + return 0; + case HKF_STATUS_INVALID: + /* Retain invalid lines, but mark file as invalid. */ + ctx->invalid = 1; + logit("%s:%ld: invalid line", l->path, l->linenum); + /* FALLTHROUGH */ + default: + fprintf(ctx->out, "%s\n", l->line); + return 0; } + /* NOTREACHED */ + return -1; +} + +static int +known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) +{ + struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; + enum sshkey_fp_rep rep; + int fptype; + char *fp; + + fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; + rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; + + if (l->status == HKF_STATUS_MATCHED) { + if (delete_host) { + if (l->marker != MRK_NONE) { + /* Don't remove CA and revocation lines */ + fprintf(ctx->out, "%s\n", l->line); + } else { + /* + * Hostname matches and has no CA/revoke + * marker, delete it by *not* writing the + * line to ctx->out. + */ + ctx->found_key = 1; + if (!quiet) + printf("# Host %s found: line %ld\n", + ctx->host, l->linenum); + } + return 0; + } else if (find_host) { + ctx->found_key = 1; + if (!quiet) { + printf("# Host %s found: line %ld %s\n", + ctx->host, + l->linenum, l->marker == MRK_CA ? "CA" : + (l->marker == MRK_REVOKE ? "REVOKED" : "")); + } + if (hash_hosts) + known_hosts_hash(l, ctx); + else if (print_fingerprint) { + fp = sshkey_fingerprint(l->key, fptype, rep); + printf("%s %s %s %s\n", ctx->host, + sshkey_type(l->key), fp, l->comment); + free(fp); + } else + fprintf(ctx->out, "%s\n", l->line); + return 0; + } + } else if (delete_host) { + /* Retain non-matching hosts when deleting */ + if (l->status == HKF_STATUS_INVALID) { + ctx->invalid = 1; + logit("%s:%ld: invalid line", l->path, l->linenum); + } + fprintf(ctx->out, "%s\n", l->line); + } + return 0; } static void do_known_hosts(struct passwd *pw, const char *name) { - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME /* * Not implemented on Win32 yet. @@ -981,25 +1154,25 @@ do_known_hosts(struct passwd *pw, const char *name) fatal("Unimplemented"); - #else - - FILE *in, *out = stdout; - Key *pub; - char *cp, *cp2, *kp, *kp2; - char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; - int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; - int ca; +#else + + char *cp, tmp[PATH_MAX], old[PATH_MAX]; + int r, fd, oerrno, inplace = 0; + struct known_hosts_ctx ctx; + u_int foreach_options; if (!have_identity) { cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); if (strlcpy(identity_file, cp, sizeof(identity_file)) >= sizeof(identity_file)) fatal("Specified known hosts path too long"); - xfree(cp); + free(cp); have_identity = 1; } - if ((in = fopen(identity_file, "r")) == NULL) - fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); + + memset(&ctx, 0, sizeof(ctx)); + ctx.out = stdout; + ctx.host = name; /* * Find hosts goes to stdout, hash and deletions happen in-place @@ -1012,150 +1185,40 @@ do_known_hosts(struct passwd *pw, const char *name) strlcat(old, ".old", sizeof(old)) >= sizeof(old)) fatal("known_hosts path too long"); umask(077); - if ((c = mkstemp(tmp)) == -1) + if ((fd = mkstemp(tmp)) == -1) fatal("mkstemp: %s", strerror(errno)); - if ((out = fdopen(c, "w")) == NULL) { - c = errno; + if ((ctx.out = fdopen(fd, "w")) == NULL) { + oerrno = errno; unlink(tmp); - fatal("fdopen: %s", strerror(c)); + fatal("fdopen: %s", strerror(oerrno)); } inplace = 1; } - while (fgets(line, sizeof(line), in)) { - if ((cp = strchr(line, '\n')) == NULL) { - error("line %d too long: %.40s...", num + 1, line); - skip = 1; - invalid = 1; - continue; - } - num++; - if (skip) { - skip = 0; - continue; - } - *cp = '\0'; + /* XXX support identity_file == "-" for stdin */ + foreach_options = find_host ? HKF_WANT_MATCH : 0; + foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; + if ((r = hostkeys_foreach(identity_file, + hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx, + name, NULL, foreach_options)) != 0) + fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); - /* Skip leading whitespace, empty and comment lines. */ - for (cp = line; *cp == ' ' || *cp == '\t'; cp++) - ; - if (!*cp || *cp == '\n' || *cp == '#') { - if (inplace) - fprintf(out, "%s\n", cp); - continue; - } - /* Check whether this is a CA key */ - if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 && - (cp[sizeof(CA_MARKER) - 1] == ' ' || - cp[sizeof(CA_MARKER) - 1] == '\t')) { - ca = 1; - cp += sizeof(CA_MARKER); - } else - ca = 0; + if (inplace) + fclose(ctx.out); - /* Find the end of the host name portion. */ - for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) - ; - - if (*kp == '\0' || *(kp + 1) == '\0') { - error("line %d missing key: %.40s...", - num, line); - invalid = 1; - continue; - } - *kp++ = '\0'; - kp2 = kp; - - pub = key_new(KEY_RSA1); - if (key_read(pub, &kp) != 1) { - kp = kp2; - key_free(pub); - pub = key_new(KEY_UNSPEC); - if (key_read(pub, &kp) != 1) { - error("line %d invalid key: %.40s...", - num, line); - key_free(pub); - invalid = 1; - continue; - } - } - - if (*cp == HASH_DELIM) { - if (find_host || delete_host) { - cp2 = host_hash(name, cp, strlen(cp)); - if (cp2 == NULL) { - error("line %d: invalid hashed " - "name: %.64s...", num, line); - invalid = 1; - continue; - } - c = (strcmp(cp2, cp) == 0); - if (find_host && c) { - printf("# Host %s found: " - "line %d type %s%s\n", name, - num, key_type(pub), - ca ? " (CA key)" : ""); - printhost(out, cp, pub, ca, 0); - } - if (delete_host && !c && !ca) - printhost(out, cp, pub, ca, 0); - } else if (hash_hosts) - printhost(out, cp, pub, ca, 0); - } else { - if (find_host || delete_host) { - c = (match_hostname(name, cp, - strlen(cp)) == 1); - if (find_host && c) { - printf("# Host %s found: " - "line %d type %s%s\n", name, - num, key_type(pub), - ca ? " (CA key)" : ""); - printhost(out, name, pub, - ca, hash_hosts && !ca); - } - if (delete_host && !c && !ca) - printhost(out, cp, pub, ca, 0); - } else if (hash_hosts) { - for (cp2 = strsep(&cp, ","); - cp2 != NULL && *cp2 != '\0'; - cp2 = strsep(&cp, ",")) { - if (ca) { - fprintf(stderr, "Warning: " - "ignoring CA key for host: " - "%.64s\n", cp2); - printhost(out, cp2, pub, ca, 0); - } else if (strcspn(cp2, "*?!") != - strlen(cp2)) { - fprintf(stderr, "Warning: " - "ignoring host name with " - "metacharacters: %.64s\n", - cp2); - printhost(out, cp2, pub, ca, 0); - } else - printhost(out, cp2, pub, ca, 1); - } - has_unhashed = 1; - } - } - key_free(pub); - } - fclose(in); - - if (invalid) { - fprintf(stderr, "%s is not a valid known_hosts file.\n", - identity_file); + if (ctx.invalid) { + error("%s is not a valid known_hosts file.", identity_file); if (inplace) { - fprintf(stderr, "Not replacing existing known_hosts " - "file because of errors\n"); - fclose(out); + error("Not replacing existing known_hosts " + "file because of errors"); unlink(tmp); } exit(1); - } - - if (inplace) { - fclose(out); - + } else if (delete_host && !ctx.found_key) { + logit("Host %s not found in %s", name, identity_file); + if (inplace) + unlink(tmp); + } else if (inplace) { /* Backup existing file */ if (unlink(old) == -1 && errno != ENOENT) fatal("unlink %.100s: %s", old, strerror(errno)); @@ -1171,19 +1234,17 @@ do_known_hosts(struct passwd *pw, const char *name) exit(1); } - fprintf(stderr, "%s updated.\n", identity_file); - fprintf(stderr, "Original contents retained as %s\n", old); - if (has_unhashed) { - fprintf(stderr, "WARNING: %s contains unhashed " - "entries\n", old); - fprintf(stderr, "Delete this file to ensure privacy " - "of hostnames\n"); + printf("%s updated.\n", identity_file); + printf("Original contents retained as %s\n", old); + if (ctx.has_unhashed) { + logit("WARNING: %s contains unhashed entries", old); + logit("Delete this file to ensure privacy " + "of hostnames"); } } - exit(0); - - #endif /* else WIN32_FIXME */ + exit (find_host && !ctx.found_key); +#endif /* else WIN32_FIXME */ } /* @@ -1196,33 +1257,34 @@ do_change_passphrase(struct passwd *pw) char *comment; char *old_passphrase, *passphrase1, *passphrase2; struct stat st; - Key *private; + struct sshkey *private; + int r; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } + if (stat(identity_file, &st) < 0) + fatal("%s: %s", identity_file, strerror(errno)); /* Try to load the file with empty passphrase. */ - private = key_load_private(identity_file, "", &comment); - if (private == NULL) { + r = sshkey_load_private(identity_file, "", &private, &comment); + if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { if (identity_passphrase) old_passphrase = xstrdup(identity_passphrase); else old_passphrase = read_passphrase("Enter old passphrase: ", RP_ALLOW_STDIN); - private = key_load_private(identity_file, old_passphrase, - &comment); - memset(old_passphrase, 0, strlen(old_passphrase)); - xfree(old_passphrase); - if (private == NULL) { - printf("Bad passphrase.\n"); - exit(1); - } + r = sshkey_load_private(identity_file, old_passphrase, + &private, &comment); + explicit_bzero(old_passphrase, strlen(old_passphrase)); + free(old_passphrase); + if (r != 0) + goto badkey; + } else if (r != 0) { + badkey: + fatal("Failed to load key %s: %s", identity_file, ssh_err(r)); } - printf("Key has comment '%s'\n", comment); + if (comment) + printf("Key has comment '%s'\n", comment); /* Ask the new passphrase (twice). */ if (identity_new_passphrase) { @@ -1237,32 +1299,34 @@ do_change_passphrase(struct passwd *pw) /* Verify that they are the same. */ if (strcmp(passphrase1, passphrase2) != 0) { - memset(passphrase1, 0, strlen(passphrase1)); - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase1); - xfree(passphrase2); + explicit_bzero(passphrase1, strlen(passphrase1)); + explicit_bzero(passphrase2, strlen(passphrase2)); + free(passphrase1); + free(passphrase2); printf("Pass phrases do not match. Try again.\n"); exit(1); } /* Destroy the other copy. */ - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase2); + explicit_bzero(passphrase2, strlen(passphrase2)); + free(passphrase2); } /* Save the file using the new passphrase. */ - if (!key_save_private(private, identity_file, passphrase1, comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - key_free(private); - xfree(comment); + if ((r = sshkey_save_private(private, identity_file, passphrase1, + comment, use_new_format, new_format_cipher, rounds)) != 0) { + error("Saving key \"%s\" failed: %s.", + identity_file, ssh_err(r)); + explicit_bzero(passphrase1, strlen(passphrase1)); + free(passphrase1); + sshkey_free(private); + free(comment); exit(1); } /* Destroy the passphrase and the copy of the key in memory. */ - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - key_free(private); /* Destroys contents */ - xfree(comment); + explicit_bzero(passphrase1, strlen(passphrase1)); + free(passphrase1); + sshkey_free(private); /* Destroys contents */ + free(comment); printf("Your identification has been saved with the new passphrase.\n"); exit(0); @@ -1274,30 +1338,25 @@ do_change_passphrase(struct passwd *pw) static int do_print_resource_record(struct passwd *pw, char *fname, char *hname) { - Key *public; + struct sshkey *public; char *comment = NULL; struct stat st; + int r; if (fname == NULL) - ask_filename(pw, "Enter file in which the key is"); + fatal("%s: no filename", __func__); if (stat(fname, &st) < 0) { if (errno == ENOENT) return 0; - perror(fname); - exit(1); + fatal("%s: %s", fname, strerror(errno)); } - public = key_load_public(fname, &comment); - if (public != NULL) { - export_dns_rr(hname, public, stdout, print_generic); - key_free(public); - xfree(comment); - return 1; - } - if (comment) - xfree(comment); - - printf("failed to read v2 public key from %s.\n", fname); - exit(1); + if ((r = sshkey_load_public(fname, &public, &comment)) != 0) + fatal("Failed to read v2 public key from \"%s\": %s.", + fname, ssh_err(r)); + export_dns_rr(hname, public, stdout, print_generic); + sshkey_free(public); + free(comment); + return 1; } /* @@ -1307,20 +1366,23 @@ static void do_change_comment(struct passwd *pw) { char new_comment[1024], *comment, *passphrase; - Key *private; - Key *public; + struct sshkey *private; + struct sshkey *public; struct stat st; FILE *f; - int fd; + int r, fd; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - private = key_load_private(identity_file, "", &comment); - if (private == NULL) { + if (stat(identity_file, &st) < 0) + fatal("%s: %s", identity_file, strerror(errno)); + if ((r = sshkey_load_private(identity_file, "", + &private, &comment)) == 0) + passphrase = xstrdup(""); + else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) + fatal("Cannot load private key \"%s\": %s.", + identity_file, ssh_err(r)); + else { if (identity_passphrase) passphrase = xstrdup(identity_passphrase); else if (identity_new_passphrase) @@ -1329,19 +1391,19 @@ do_change_comment(struct passwd *pw) passphrase = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); /* Try to load using the passphrase. */ - private = key_load_private(identity_file, passphrase, &comment); - if (private == NULL) { - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - printf("Bad passphrase.\n"); - exit(1); + if ((r = sshkey_load_private(identity_file, passphrase, + &private, &comment)) != 0) { + explicit_bzero(passphrase, strlen(passphrase)); + free(passphrase); + fatal("Cannot load private key \"%s\": %s.", + identity_file, ssh_err(r)); } - } else { - passphrase = xstrdup(""); } + /* XXX what about new-format keys? */ if (private->type != KEY_RSA1) { - fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); - key_free(private); + error("Comments are only supported for RSA1 keys."); + explicit_bzero(passphrase, strlen(passphrase)); + sshkey_free(private); exit(1); } printf("Key now has comment '%s'\n", comment); @@ -1352,45 +1414,44 @@ do_change_comment(struct passwd *pw) printf("Enter new comment: "); fflush(stdout); if (!fgets(new_comment, sizeof(new_comment), stdin)) { - memset(passphrase, 0, strlen(passphrase)); - key_free(private); + explicit_bzero(passphrase, strlen(passphrase)); + sshkey_free(private); exit(1); } new_comment[strcspn(new_comment, "\n")] = '\0'; } /* Save the file using the new passphrase. */ - if (!key_save_private(private, identity_file, passphrase, new_comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - key_free(private); - xfree(comment); + if ((r = sshkey_save_private(private, identity_file, passphrase, + new_comment, use_new_format, new_format_cipher, rounds)) != 0) { + error("Saving key \"%s\" failed: %s", + identity_file, ssh_err(r)); + explicit_bzero(passphrase, strlen(passphrase)); + free(passphrase); + sshkey_free(private); + free(comment); exit(1); } - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - public = key_from_private(private); - key_free(private); + explicit_bzero(passphrase, strlen(passphrase)); + free(passphrase); + if ((r = sshkey_from_private(private, &public)) != 0) + fatal("key_from_private failed: %s", ssh_err(r)); + sshkey_free(private); strlcat(identity_file, ".pub", sizeof(identity_file)); fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Could not save your public key in %s\n", identity_file); - exit(1); - } + if (fd == -1) + fatal("Could not save your public key in %s", identity_file); f = fdopen(fd, "w"); - if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - exit(1); - } - if (!key_write(public, f)) - fprintf(stderr, "write key failed\n"); - key_free(public); + if (f == NULL) + fatal("fdopen %s failed: %s", identity_file, strerror(errno)); + if ((r = sshkey_write(public, f)) != 0) + fatal("write key failed: %s", ssh_err(r)); + sshkey_free(public); fprintf(f, " %s\n", new_comment); fclose(f); - xfree(comment); + free(comment); printf("The comment in your key file has been changed.\n"); exit(0); @@ -1435,34 +1496,39 @@ fmt_validity(u_int64_t valid_from, u_int64_t valid_to) } static void -add_flag_option(Buffer *c, const char *name) +add_flag_option(struct sshbuf *c, const char *name) { + int r; + debug3("%s: %s", __func__, name); - buffer_put_cstring(c, name); - buffer_put_string(c, NULL, 0); + if ((r = sshbuf_put_cstring(c, name)) != 0 || + (r = sshbuf_put_string(c, NULL, 0)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); } static void -add_string_option(Buffer *c, const char *name, const char *value) +add_string_option(struct sshbuf *c, const char *name, const char *value) { - Buffer b; + struct sshbuf *b; + int r; debug3("%s: %s=%s", __func__, name, value); - buffer_init(&b); - buffer_put_cstring(&b, value); + if ((b = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if ((r = sshbuf_put_cstring(b, value)) != 0 || + (r = sshbuf_put_cstring(c, name)) != 0 || + (r = sshbuf_put_stringb(c, b)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - buffer_put_cstring(c, name); - buffer_put_string(c, buffer_ptr(&b), buffer_len(&b)); - - buffer_free(&b); + sshbuf_free(b); } #define OPTIONS_CRITICAL 1 #define OPTIONS_EXTENSIONS 2 static void -prepare_options_buf(Buffer *c, int which) +prepare_options_buf(struct sshbuf *c, int which) { - buffer_clear(c); + sshbuf_reset(c); if ((which & OPTIONS_CRITICAL) != 0 && certflags_command != NULL) add_string_option(c, "force-command", certflags_command); @@ -1486,29 +1552,30 @@ prepare_options_buf(Buffer *c, int which) add_string_option(c, "source-address", certflags_src_addr); } -static Key * +static struct sshkey * load_pkcs11_key(char *path) { #ifdef ENABLE_PKCS11 - Key **keys = NULL, *public, *private = NULL; - int i, nkeys; + struct sshkey **keys = NULL, *public, *private = NULL; + int r, i, nkeys; - if ((public = key_load_public(path, NULL)) == NULL) - fatal("Couldn't load CA public key \"%s\"", path); + if ((r = sshkey_load_public(path, &public, NULL)) != 0) + fatal("Couldn't load CA public key \"%s\": %s", + path, ssh_err(r)); nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); debug3("%s: %d keys", __func__, nkeys); if (nkeys <= 0) fatal("cannot read public key from pkcs11"); for (i = 0; i < nkeys; i++) { - if (key_equal_public(public, keys[i])) { + if (sshkey_equal_public(public, keys[i])) { private = keys[i]; continue; } - key_free(keys[i]); + sshkey_free(keys[i]); } - xfree(keys); - key_free(public); + free(keys); + sshkey_free(public); return private; #else fatal("no pkcs11 support"); @@ -1518,40 +1585,22 @@ load_pkcs11_key(char *path) static void do_ca_sign(struct passwd *pw, int argc, char **argv) { - int i, fd; + int r, i, fd; u_int n; - Key *ca, *public; + struct sshkey *ca, *public; char *otmp, *tmp, *cp, *out, *comment, **plist = NULL; FILE *f; - int v00 = 0; /* legacy keys */ - - if (key_type_name != NULL) { - switch (key_type_from_name(key_type_name)) { - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: - v00 = 1; - break; - case KEY_UNSPEC: - if (strcasecmp(key_type_name, "v00") == 0) { - v00 = 1; - break; - } else if (strcasecmp(key_type_name, "v01") == 0) - break; - /* FALLTHROUGH */ - default: - fprintf(stderr, "unknown key type %s\n", key_type_name); - exit(1); - } - } +#ifdef ENABLE_PKCS11 pkcs11_init(1); +#endif tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); if (pkcs11provider != NULL) { if ((ca = load_pkcs11_key(tmp)) == NULL) fatal("No PKCS#11 key matching %s found", ca_key_path); - } else if ((ca = load_identity(tmp)) == NULL) - fatal("Couldn't load CA key \"%s\"", tmp); - xfree(tmp); + } else + ca = load_identity(tmp); + free(tmp); for (i = 0; i < argc; i++) { /* Split list of principals */ @@ -1560,24 +1609,26 @@ do_ca_sign(struct passwd *pw, int argc, char **argv) otmp = tmp = xstrdup(cert_principals); plist = NULL; for (; (cp = strsep(&tmp, ",")) != NULL; n++) { - plist = xrealloc(plist, n + 1, sizeof(*plist)); + plist = xreallocarray(plist, n + 1, sizeof(*plist)); if (*(plist[n] = xstrdup(cp)) == '\0') fatal("Empty principal name"); } - xfree(otmp); + free(otmp); } tmp = tilde_expand_filename(argv[i], pw->pw_uid); - if ((public = key_load_public(tmp, &comment)) == NULL) - fatal("%s: unable to open \"%s\"", __func__, tmp); + if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) + fatal("%s: unable to open \"%s\": %s", + __func__, tmp, ssh_err(r)); if (public->type != KEY_RSA && public->type != KEY_DSA && - public->type != KEY_ECDSA) + public->type != KEY_ECDSA && public->type != KEY_ED25519) fatal("%s: key \"%s\" type %s cannot be certified", - __func__, tmp, key_type(public)); + __func__, tmp, sshkey_type(public)); /* Prepare certificate to sign */ - if (key_to_certified(public, v00) != 0) - fatal("Could not upgrade key %s to certificate", tmp); + if ((r = sshkey_to_certified(public)) != 0) + fatal("Could not upgrade key %s to certificate: %s", + tmp, ssh_err(r)); public->cert->type = cert_key_type; public->cert->serial = (u_int64_t)cert_serial; public->cert->key_id = xstrdup(cert_key_id); @@ -1585,38 +1636,35 @@ do_ca_sign(struct passwd *pw, int argc, char **argv) public->cert->principals = plist; public->cert->valid_after = cert_valid_from; public->cert->valid_before = cert_valid_to; - if (v00) { - prepare_options_buf(&public->cert->critical, - OPTIONS_CRITICAL|OPTIONS_EXTENSIONS); - } else { - prepare_options_buf(&public->cert->critical, - OPTIONS_CRITICAL); - prepare_options_buf(&public->cert->extensions, - OPTIONS_EXTENSIONS); - } - public->cert->signature_key = key_from_private(ca); + prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); + prepare_options_buf(public->cert->extensions, + OPTIONS_EXTENSIONS); + if ((r = sshkey_from_private(ca, + &public->cert->signature_key)) != 0) + fatal("key_from_private (ca key): %s", ssh_err(r)); - if (key_certify(public, ca) != 0) + if (sshkey_certify(public, ca) != 0) fatal("Couldn't not certify key %s", tmp); if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) *cp = '\0'; xasprintf(&out, "%s-cert.pub", tmp); - xfree(tmp); + free(tmp); if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) fatal("Could not open \"%s\" for writing: %s", out, strerror(errno)); if ((f = fdopen(fd, "w")) == NULL) fatal("%s: fdopen: %s", __func__, strerror(errno)); - if (!key_write(public, f)) - fatal("Could not write certified key to %s", out); + if ((r = sshkey_write(public, f)) != 0) + fatal("Could not write certified key to %s: %s", + out, ssh_err(r)); fprintf(f, " %s\n", comment); fclose(f); if (!quiet) { logit("Signed %s key %s: id \"%s\" serial %llu%s%s " - "valid %s", key_cert_type(public), + "valid %s", sshkey_cert_type(public), out, public->cert->key_id, (unsigned long long)public->cert->serial, cert_principals != NULL ? " for " : "", @@ -1624,10 +1672,12 @@ do_ca_sign(struct passwd *pw, int argc, char **argv) fmt_validity(cert_valid_from, cert_valid_to)); } - key_free(public); - xfree(out); + sshkey_free(public); + free(out); } +#ifdef ENABLE_PKCS11 pkcs11_terminate(); +#endif exit(0); } @@ -1671,7 +1721,7 @@ parse_absolute_time(const char *s) fatal("Invalid certificate time format %s", s); } - bzero(&tm, sizeof(tm)); + memset(&tm, 0, sizeof(tm)); if (strptime(buf, fmt, &tm) == NULL) fatal("Invalid certificate time %s", s); if ((tt = mktime(&tm)) < 0) @@ -1716,13 +1766,13 @@ parse_cert_times(char *timespec) cert_valid_from = parse_absolute_time(from); if (*to == '-' || *to == '+') - cert_valid_to = parse_relative_time(to, cert_valid_from); + cert_valid_to = parse_relative_time(to, now); else cert_valid_to = parse_absolute_time(to); if (cert_valid_to <= cert_valid_from) fatal("Empty certificate validity interval"); - xfree(from); + free(from); } static void @@ -1773,80 +1823,82 @@ add_cert_option(char *opt) } static void -show_options(const Buffer *optbuf, int v00, int in_critical) +show_options(struct sshbuf *optbuf, int in_critical) { - u_char *name, *data; - u_int dlen; - Buffer options, option; + char *name, *arg; + struct sshbuf *options, *option = NULL; + int r; - buffer_init(&options); - buffer_append(&options, buffer_ptr(optbuf), buffer_len(optbuf)); - - buffer_init(&option); - while (buffer_len(&options) != 0) { - name = buffer_get_string(&options, NULL); - data = buffer_get_string_ptr(&options, &dlen); - buffer_append(&option, data, dlen); + if ((options = sshbuf_fromb(optbuf)) == NULL) + fatal("%s: sshbuf_fromb failed", __func__); + while (sshbuf_len(options) != 0) { + sshbuf_free(option); + option = NULL; + if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || + (r = sshbuf_froms(options, &option)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); printf(" %s", name); - if ((v00 || !in_critical) && + if (!in_critical && (strcmp(name, "permit-X11-forwarding") == 0 || strcmp(name, "permit-agent-forwarding") == 0 || strcmp(name, "permit-port-forwarding") == 0 || strcmp(name, "permit-pty") == 0 || strcmp(name, "permit-user-rc") == 0)) printf("\n"); - else if ((v00 || in_critical) && + else if (in_critical && (strcmp(name, "force-command") == 0 || strcmp(name, "source-address") == 0)) { - data = buffer_get_string(&option, NULL); - printf(" %s\n", data); - xfree(data); + if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) + fatal("%s: buffer error: %s", + __func__, ssh_err(r)); + printf(" %s\n", arg); + free(arg); } else { - printf(" UNKNOWN OPTION (len %u)\n", - buffer_len(&option)); - buffer_clear(&option); + printf(" UNKNOWN OPTION (len %zu)\n", + sshbuf_len(option)); + sshbuf_reset(option); } - xfree(name); - if (buffer_len(&option) != 0) + free(name); + if (sshbuf_len(option) != 0) fatal("Option corrupt: extra data at end"); } - buffer_free(&option); - buffer_free(&options); + sshbuf_free(option); + sshbuf_free(options); } static void do_show_cert(struct passwd *pw) { - Key *key; + struct sshkey *key; struct stat st; char *key_fp, *ca_fp; - u_int i, v00; + u_int i; + int r; if (!have_identity) ask_filename(pw, "Enter file in which the key is"); if (stat(identity_file, &st) < 0) fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - if ((key = key_load_public(identity_file, NULL)) == NULL) - fatal("%s is not a public key", identity_file); - if (!key_is_cert(key)) + if ((r = sshkey_load_public(identity_file, &key, NULL)) != 0) + fatal("Cannot load public key \"%s\": %s", + identity_file, ssh_err(r)); + if (!sshkey_is_cert(key)) fatal("%s is not a certificate", identity_file); - v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00; - key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); - ca_fp = key_fingerprint(key->cert->signature_key, - SSH_FP_MD5, SSH_FP_HEX); + key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); + ca_fp = sshkey_fingerprint(key->cert->signature_key, + fingerprint_hash, SSH_FP_DEFAULT); + if (key_fp == NULL || ca_fp == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); printf("%s:\n", identity_file); - printf(" Type: %s %s certificate\n", key_ssh_name(key), - key_cert_type(key)); - printf(" Public key: %s %s\n", key_type(key), key_fp); + printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), + sshkey_cert_type(key)); + printf(" Public key: %s %s\n", sshkey_type(key), key_fp); printf(" Signing CA: %s %s\n", - key_type(key->cert->signature_key), ca_fp); + sshkey_type(key->cert->signature_key), ca_fp); printf(" Key ID: \"%s\"\n", key->cert->key_id); - if (!v00) { - printf(" Serial: %llu\n", - (unsigned long long)key->cert->serial); - } + printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); printf(" Valid: %s\n", fmt_validity(key->cert->valid_after, key->cert->valid_before)); printf(" Principals: "); @@ -1859,69 +1911,289 @@ do_show_cert(struct passwd *pw) printf("\n"); } printf(" Critical Options: "); - if (buffer_len(&key->cert->critical) == 0) + if (sshbuf_len(key->cert->critical) == 0) printf("(none)\n"); else { printf("\n"); - show_options(&key->cert->critical, v00, 1); + show_options(key->cert->critical, 1); } - if (!v00) { - printf(" Extensions: "); - if (buffer_len(&key->cert->extensions) == 0) - printf("(none)\n"); - else { - printf("\n"); - show_options(&key->cert->extensions, v00, 0); - } + printf(" Extensions: "); + if (sshbuf_len(key->cert->extensions) == 0) + printf("(none)\n"); + else { + printf("\n"); + show_options(key->cert->extensions, 0); } exit(0); } +static void +load_krl(const char *path, struct ssh_krl **krlp) +{ + struct sshbuf *krlbuf; + int r, fd; + + if ((krlbuf = sshbuf_new()) == NULL) + fatal("sshbuf_new failed"); + if ((fd = open(path, O_RDONLY)) == -1) + fatal("open %s: %s", path, strerror(errno)); + if ((r = sshkey_load_file(fd, krlbuf)) != 0) + fatal("Unable to load KRL: %s", ssh_err(r)); + close(fd); + /* XXX check sigs */ + if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || + *krlp == NULL) + fatal("Invalid KRL file: %s", ssh_err(r)); + sshbuf_free(krlbuf); +} + +static void +update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, + const struct sshkey *ca, struct ssh_krl *krl) +{ + struct sshkey *key = NULL; + u_long lnum = 0; + char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES]; + unsigned long long serial, serial2; + int i, was_explicit_key, was_sha1, r; + FILE *krl_spec; + + path = tilde_expand_filename(file, pw->pw_uid); + if (strcmp(path, "-") == 0) { + krl_spec = stdin; + free(path); + path = xstrdup("(standard input)"); + } else if ((krl_spec = fopen(path, "r")) == NULL) + fatal("fopen %s: %s", path, strerror(errno)); + + if (!quiet) + printf("Revoking from %s\n", path); + while (read_keyfile_line(krl_spec, path, line, sizeof(line), + &lnum) == 0) { + was_explicit_key = was_sha1 = 0; + cp = line + strspn(line, " \t"); + /* Trim trailing space, comments and strip \n */ + for (i = 0, r = -1; cp[i] != '\0'; i++) { + if (cp[i] == '#' || cp[i] == '\n') { + cp[i] = '\0'; + break; + } + if (cp[i] == ' ' || cp[i] == '\t') { + /* Remember the start of a span of whitespace */ + if (r == -1) + r = i; + } else + r = -1; + } + if (r != -1) + cp[r] = '\0'; + if (*cp == '\0') + continue; + if (strncasecmp(cp, "serial:", 7) == 0) { + if (ca == NULL && !wild_ca) { + fatal("revoking certificates by serial number " + "requires specification of a CA key"); + } + cp += 7; + cp = cp + strspn(cp, " \t"); + errno = 0; + serial = strtoull(cp, &ep, 0); + if (*cp == '\0' || (*ep != '\0' && *ep != '-')) + fatal("%s:%lu: invalid serial \"%s\"", + path, lnum, cp); + if (errno == ERANGE && serial == ULLONG_MAX) + fatal("%s:%lu: serial out of range", + path, lnum); + serial2 = serial; + if (*ep == '-') { + cp = ep + 1; + errno = 0; + serial2 = strtoull(cp, &ep, 0); + if (*cp == '\0' || *ep != '\0') + fatal("%s:%lu: invalid serial \"%s\"", + path, lnum, cp); + if (errno == ERANGE && serial2 == ULLONG_MAX) + fatal("%s:%lu: serial out of range", + path, lnum); + if (serial2 <= serial) + fatal("%s:%lu: invalid serial range " + "%llu:%llu", path, lnum, + (unsigned long long)serial, + (unsigned long long)serial2); + } + if (ssh_krl_revoke_cert_by_serial_range(krl, + ca, serial, serial2) != 0) { + fatal("%s: revoke serial failed", + __func__); + } + } else if (strncasecmp(cp, "id:", 3) == 0) { + if (ca == NULL && !wild_ca) { + fatal("revoking certificates by key ID " + "requires specification of a CA key"); + } + cp += 3; + cp = cp + strspn(cp, " \t"); + if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) + fatal("%s: revoke key ID failed", __func__); + } else { + if (strncasecmp(cp, "key:", 4) == 0) { + cp += 4; + cp = cp + strspn(cp, " \t"); + was_explicit_key = 1; + } else if (strncasecmp(cp, "sha1:", 5) == 0) { + cp += 5; + cp = cp + strspn(cp, " \t"); + was_sha1 = 1; + } else { + /* + * Just try to process the line as a key. + * Parsing will fail if it isn't. + */ + } + if ((key = sshkey_new(KEY_UNSPEC)) == NULL) + fatal("key_new"); + if ((r = sshkey_read(key, &cp)) != 0) + fatal("%s:%lu: invalid key: %s", + path, lnum, ssh_err(r)); + if (was_explicit_key) + r = ssh_krl_revoke_key_explicit(krl, key); + else if (was_sha1) + r = ssh_krl_revoke_key_sha1(krl, key); + else + r = ssh_krl_revoke_key(krl, key); + if (r != 0) + fatal("%s: revoke key failed: %s", + __func__, ssh_err(r)); + sshkey_free(key); + } + } + if (strcmp(path, "-") != 0) + fclose(krl_spec); + free(path); +} + +static void +do_gen_krl(struct passwd *pw, int updating, int argc, char **argv) +{ + struct ssh_krl *krl; + struct stat sb; + struct sshkey *ca = NULL; + int fd, i, r, wild_ca = 0; + char *tmp; + struct sshbuf *kbuf; + + if (*identity_file == '\0') + fatal("KRL generation requires an output file"); + if (stat(identity_file, &sb) == -1) { + if (errno != ENOENT) + fatal("Cannot access KRL \"%s\": %s", + identity_file, strerror(errno)); + if (updating) + fatal("KRL \"%s\" does not exist", identity_file); + } + if (ca_key_path != NULL) { + if (strcasecmp(ca_key_path, "none") == 0) + wild_ca = 1; + else { + tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); + if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) + fatal("Cannot load CA public key %s: %s", + tmp, ssh_err(r)); + free(tmp); + } + } + + if (updating) + load_krl(identity_file, &krl); + else if ((krl = ssh_krl_init()) == NULL) + fatal("couldn't create KRL"); + + if (cert_serial != 0) + ssh_krl_set_version(krl, cert_serial); + if (identity_comment != NULL) + ssh_krl_set_comment(krl, identity_comment); + + for (i = 0; i < argc; i++) + update_krl_from_file(pw, argv[i], wild_ca, ca, krl); + + if ((kbuf = sshbuf_new()) == NULL) + fatal("sshbuf_new failed"); + if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) + fatal("Couldn't generate KRL"); + if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) + fatal("open %s: %s", identity_file, strerror(errno)); + if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) != + sshbuf_len(kbuf)) + fatal("write %s: %s", identity_file, strerror(errno)); + close(fd); + sshbuf_free(kbuf); + ssh_krl_free(krl); + if (ca != NULL) + sshkey_free(ca); +} + +static void +do_check_krl(struct passwd *pw, int argc, char **argv) +{ + int i, r, ret = 0; + char *comment; + struct ssh_krl *krl; + struct sshkey *k; + + if (*identity_file == '\0') + fatal("KRL checking requires an input file"); + load_krl(identity_file, &krl); + for (i = 0; i < argc; i++) { + if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) + fatal("Cannot load public key %s: %s", + argv[i], ssh_err(r)); + r = ssh_krl_check_key(krl, k); + printf("%s%s%s%s: %s\n", argv[i], + *comment ? " (" : "", comment, *comment ? ")" : "", + r == 0 ? "ok" : "REVOKED"); + if (r != 0) + ret = 1; + sshkey_free(k); + free(comment); + } + ssh_krl_free(krl); + exit(ret); +} + static void usage(void) { - fprintf(stderr, "usage: %s [options]\n", __progname); - fprintf(stderr, "Options:\n"); - fprintf(stderr, " -A Generate non-existent host keys for all key types.\n"); - fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); - fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); - fprintf(stderr, " -b bits Number of bits in the key to create.\n"); - fprintf(stderr, " -C comment Provide new comment.\n"); - fprintf(stderr, " -c Change comment in private and public key files.\n"); + fprintf(stderr, + "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa | rsa1]\n" + " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" + " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n" + " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" + " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" + " ssh-keygen -y [-f input_keyfile]\n" + " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" + " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" + " ssh-keygen -B [-f input_keyfile]\n"); #ifdef ENABLE_PKCS11 - fprintf(stderr, " -D pkcs11 Download public key from pkcs11 token.\n"); + fprintf(stderr, + " ssh-keygen -D pkcs11\n"); #endif - fprintf(stderr, " -e Export OpenSSH to foreign format key file.\n"); - fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); - fprintf(stderr, " -f filename Filename of the key file.\n"); - fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); - fprintf(stderr, " -g Use generic DNS resource record format.\n"); - fprintf(stderr, " -H Hash names in known_hosts file.\n"); - fprintf(stderr, " -h Generate host certificate instead of a user certificate.\n"); - fprintf(stderr, " -I key_id Key identifier to include in certificate.\n"); - fprintf(stderr, " -i Import foreign format to OpenSSH key file.\n"); - fprintf(stderr, " -L Print the contents of a certificate.\n"); - fprintf(stderr, " -l Show fingerprint of key file.\n"); - fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); - fprintf(stderr, " -m key_fmt Conversion format for -e/-i (PEM|PKCS8|RFC4716).\n"); - fprintf(stderr, " -N phrase Provide new passphrase.\n"); - fprintf(stderr, " -n name,... User/host principal names to include in certificate\n"); - fprintf(stderr, " -O option Specify a certificate option.\n"); - fprintf(stderr, " -P phrase Provide old passphrase.\n"); - fprintf(stderr, " -p Change passphrase of private key file.\n"); - fprintf(stderr, " -q Quiet.\n"); - fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); - fprintf(stderr, " -r hostname Print DNS resource record.\n"); - fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); - fprintf(stderr, " -s ca_key Certify keys with CA key.\n"); - fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); - fprintf(stderr, " -t type Specify type of key to create.\n"); - fprintf(stderr, " -V from:to Specify certificate validity interval.\n"); - fprintf(stderr, " -v Verbose.\n"); - fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); - fprintf(stderr, " -y Read private key file and print public key.\n"); - fprintf(stderr, " -z serial Specify a serial number.\n"); - + fprintf(stderr, + " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" + " ssh-keygen -H [-f known_hosts_file]\n" + " ssh-keygen -R hostname [-f known_hosts_file]\n" + " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" +#ifdef WITH_OPENSSL + " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" + " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" + " [-j start_line] [-K checkpt] [-W generator]\n" +#endif + " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n" + " [-O option] [-V validity_interval] [-z serial_number] file ...\n" + " ssh-keygen -L [-f input_keyfile]\n" + " ssh-keygen -A\n" + " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" + " file ...\n" + " ssh-keygen -Q -f krl_file file ...\n"); exit(1); } @@ -1931,26 +2203,31 @@ usage(void) int main(int argc, char **argv) { - char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; - char out_file[MAXPATHLEN], *rr_hostname = NULL; - Key *private, *public; + char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; + char *rr_hostname = NULL, *ep, *fp, *ra; + struct sshkey *private, *public; struct passwd *pw; struct stat st; - int opt, type, fd; - u_int32_t memory = 0, generator_wanted = 0, trials = 100; - int do_gen_candidates = 0, do_screen_candidates = 0; - int gen_all_hostkeys = 0; - BIGNUM *start = NULL; + int r, opt, type, fd; + int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; FILE *f; const char *errstr; +#ifdef WITH_OPENSSL + /* Moduli generation/screening */ + char out_file[PATH_MAX], *checkpoint = NULL; + u_int32_t memory = 0, generator_wanted = 0; + int do_gen_candidates = 0, do_screen_candidates = 0; + unsigned long start_lineno = 0, lines_to_process = 0; + BIGNUM *start = NULL; +#endif extern int optind; extern char *optarg; /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ sanitise_stdfd(); - - #ifdef WIN32_FIXME + +#ifdef WIN32_FIXME /* * Init wrapped stdio. @@ -2037,43 +2314,39 @@ main(int argc, char **argv) exit(0); } - #endif + #endif __progname = ssh_get_progname(argv[0]); +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); +#endif log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); seed_rng(); /* we need this for the home * directory. */ pw = getpwuid(getuid()); - if (!pw) { - printf("You don't exist, go away!\n"); - exit(1); - } + if (!pw) + fatal("No user exists for uid %lu", (u_long)getuid()); if (gethostname(hostname, sizeof(hostname)) < 0) { - - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME DWORD local_len = sizeof(hostname); if (!GetComputerNameA(hostname, &local_len)) { - #endif - - perror("gethostname"); - exit(1); - - #ifdef WIN32_FIXME + #endif + fatal("gethostname: %s", strerror(errno)); + #ifdef WIN32_FIXME } #endif - } - - while ((opt = getopt(argc, argv, "AegiqpclBHLhvxXyF:b:f:t:D:I:P:m:N:n:" - "O:C:r:g:R:T:G:M:S:s:a:V:W:z:")) != -1) { + /* Remaining characters: UYdw */ + while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy" + "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:" + "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { switch (opt) { case 'A': gen_all_hostkeys = 1; @@ -2084,6 +2357,11 @@ main(int argc, char **argv) fatal("Bits has bad value %s (%s)", optarg, errstr); break; + case 'E': + fingerprint_hash = ssh_digest_alg_by_name(optarg); + if (fingerprint_hash == -1) + fatal("Invalid hash algorithm \"%s\"", optarg); + break; case 'F': find_host = 1; rr_hostname = optarg; @@ -2125,6 +2403,9 @@ main(int argc, char **argv) case 'n': cert_principals = optarg; break; + case 'o': + use_new_format = 1; + break; case 'p': change_passphrase = 1; break; @@ -2132,8 +2413,8 @@ main(int argc, char **argv) change_comment = 1; break; case 'f': - if (strlcpy(identity_file, optarg, sizeof(identity_file)) >= - sizeof(identity_file)) + if (strlcpy(identity_file, optarg, + sizeof(identity_file)) >= sizeof(identity_file)) fatal("Identity filename too long"); have_identity = 1; break; @@ -2146,9 +2427,15 @@ main(int argc, char **argv) case 'N': identity_new_passphrase = optarg; break; + case 'Q': + check_krl = 1; + break; case 'O': add_cert_option(optarg); break; + case 'Z': + new_format_cipher = optarg; + break; case 'C': identity_comment = optarg; break; @@ -2164,6 +2451,9 @@ main(int argc, char **argv) cert_key_type = SSH2_CERT_TYPE_HOST; certflags_flags = 0; break; + case 'k': + gen_krl = 1; + break; case 'i': case 'X': /* import key */ @@ -2181,6 +2471,9 @@ main(int argc, char **argv) case 'D': pkcs11provider = optarg; break; + case 'u': + update_krl = 1; + break; case 'v': if (log_level == SYSLOG_LEVEL_INFO) log_level = SYSLOG_LEVEL_DEBUG1; @@ -2193,6 +2486,24 @@ main(int argc, char **argv) case 'r': rr_hostname = optarg; break; + case 'a': + rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); + if (errstr) + fatal("Invalid number: %s (%s)", + optarg, errstr); + break; + case 'V': + parse_cert_times(optarg); + break; + case 'z': + errno = 0; + cert_serial = strtoull(optarg, &ep, 10); + if (*optarg < '0' || *optarg > '9' || *ep != '\0' || + (errno == ERANGE && cert_serial == ULLONG_MAX)) + fatal("Invalid serial number \"%s\"", optarg); + break; +#ifdef WITH_OPENSSL + /* Moduli generation/screening */ case 'W': generator_wanted = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); @@ -2200,12 +2511,6 @@ main(int argc, char **argv) fatal("Desired generator has bad value: %s (%s)", optarg, errstr); break; - case 'a': - trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); - if (errstr) - fatal("Invalid number of trials: %s (%s)", - optarg, errstr); - break; case 'M': memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); if (errstr) @@ -2223,19 +2528,17 @@ main(int argc, char **argv) sizeof(out_file)) fatal("Output filename too long"); break; + case 'K': + if (strlen(optarg) >= PATH_MAX) + fatal("Checkpoint filename too long"); + checkpoint = xstrdup(optarg); + break; case 'S': /* XXX - also compare length against bits */ if (BN_hex2bn(&start, optarg) == 0) fatal("Invalid start point."); break; - case 'V': - parse_cert_times(optarg); - break; - case 'z': - cert_serial = strtonum(optarg, 0, LLONG_MAX, &errstr); - if (errstr) - fatal("Invalid serial number: %s", errstr); - break; +#endif /* WITH_OPENSSL */ case '?': default: usage(); @@ -2249,22 +2552,30 @@ main(int argc, char **argv) argc -= optind; if (ca_key_path != NULL) { - if (argc < 1) { - printf("Too few arguments.\n"); + if (argc < 1 && !gen_krl) { + error("Too few arguments."); usage(); } - } else if (argc > 0) { - printf("Too many arguments.\n"); + } else if (argc > 0 && !gen_krl && !check_krl) { + error("Too many arguments."); usage(); } if (change_passphrase && change_comment) { - printf("Can only have one of -p and -c.\n"); + error("Can only have one of -p and -c."); usage(); } if (print_fingerprint && (delete_host || hash_hosts)) { - printf("Cannot use -l with -D or -R.\n"); + error("Cannot use -l with -H or -R."); usage(); } + if (gen_krl) { + do_gen_krl(pw, update_krl, argc, argv); + return (0); + } + if (check_krl) { + do_check_krl(pw, argc, argv); + return (0); + } if (ca_key_path != NULL) { if (cert_key_id == NULL) fatal("Must specify key id (-I) when certifying"); @@ -2274,16 +2585,20 @@ main(int argc, char **argv) do_show_cert(pw); if (delete_host || hash_hosts || find_host) do_known_hosts(pw, rr_hostname); + if (pkcs11provider != NULL) + do_download(pw); if (print_fingerprint || print_bubblebabble) do_fingerprint(pw); if (change_passphrase) do_change_passphrase(pw); if (change_comment) do_change_comment(pw); +#ifdef WITH_OPENSSL if (convert_to) do_convert_to(pw); if (convert_from) do_convert_from(pw); +#endif if (print_public) do_print_public(pw); if (rr_hostname != NULL) { @@ -2292,10 +2607,8 @@ main(int argc, char **argv) if (have_identity) { n = do_print_resource_record(pw, identity_file, rr_hostname); - if (n == 0) { - perror(identity_file); - exit(1); - } + if (n == 0) + fatal("%s: %s", identity_file, strerror(errno)); exit(0); } else { @@ -2303,15 +2616,17 @@ main(int argc, char **argv) _PATH_HOST_RSA_KEY_FILE, rr_hostname); n += do_print_resource_record(pw, _PATH_HOST_DSA_KEY_FILE, rr_hostname); - + n += do_print_resource_record(pw, + _PATH_HOST_ECDSA_KEY_FILE, rr_hostname); + n += do_print_resource_record(pw, + _PATH_HOST_ED25519_KEY_FILE, rr_hostname); if (n == 0) fatal("no keys found."); exit(0); } } - if (pkcs11provider != NULL) - do_download(pw); +#ifdef WITH_OPENSSL if (do_gen_candidates) { FILE *out = fopen(out_file, "w"); @@ -2330,7 +2645,7 @@ main(int argc, char **argv) if (do_screen_candidates) { FILE *in; - FILE *out = fopen(out_file, "w"); + FILE *out = fopen(out_file, "a"); if (have_identity && strcmp(identity_file, "-") != 0) { if ((in = fopen(identity_file, "r")) == NULL) { @@ -2345,32 +2660,32 @@ main(int argc, char **argv) fatal("Couldn't open moduli file \"%s\": %s", out_file, strerror(errno)); } - if (prime_test(in, out, trials, generator_wanted) != 0) + if (prime_test(in, out, rounds == 0 ? 100 : rounds, + generator_wanted, checkpoint, + start_lineno, lines_to_process) != 0) fatal("modulus screening failed"); return (0); } +#endif if (gen_all_hostkeys) { do_gen_all_hostkeys(pw); return (0); } - arc4random_stir(); - if (key_type_name == NULL) - key_type_name = "rsa"; + key_type_name = DEFAULT_KEY_TYPE_NAME; - type = key_type_from_name(key_type_name); - type_bits_valid(type, &bits); + type = sshkey_type_from_name(key_type_name); + type_bits_valid(type, key_type_name, &bits); if (!quiet) - printf("Generating public/private %s key pair.\n", key_type_name); - private = key_generate(type, bits); - if (private == NULL) { - fprintf(stderr, "key_generate failed\n"); - exit(1); - } - public = key_from_private(private); + printf("Generating public/private %s key pair.\n", + key_type_name); + if ((r = sshkey_generate(type, bits, &private)) != 0) + fatal("key_generate failed"); + if ((r = sshkey_from_private(private, &public)) != 0) + fatal("key_from_private failed: %s\n", ssh_err(r)); if (!have_identity) ask_filename(pw, "Enter file in which to save the key"); @@ -2426,16 +2741,16 @@ passphrase_again: * The passphrases do not match. Clear them and * retry. */ - memset(passphrase1, 0, strlen(passphrase1)); - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase1); - xfree(passphrase2); + explicit_bzero(passphrase1, strlen(passphrase1)); + explicit_bzero(passphrase2, strlen(passphrase2)); + free(passphrase1); + free(passphrase2); printf("Passphrases do not match. Try again.\n"); goto passphrase_again; } /* Clear the other copy of the passphrase. */ - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase2); + explicit_bzero(passphrase2, strlen(passphrase2)); + free(passphrase2); } if (identity_comment) { @@ -2446,53 +2761,52 @@ passphrase_again: } /* Save the key with the given passphrase and comment. */ - if (!key_save_private(private, identity_file, passphrase1, comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); + if ((r = sshkey_save_private(private, identity_file, passphrase1, + comment, use_new_format, new_format_cipher, rounds)) != 0) { + error("Saving key \"%s\" failed: %s", + identity_file, ssh_err(r)); + explicit_bzero(passphrase1, strlen(passphrase1)); + free(passphrase1); exit(1); } /* Clear the passphrase. */ - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); + explicit_bzero(passphrase1, strlen(passphrase1)); + free(passphrase1); /* Clear the private key and the random number generator. */ - key_free(private); - arc4random_stir(); + sshkey_free(private); if (!quiet) printf("Your identification has been saved in %s.\n", identity_file); strlcat(identity_file, ".pub", sizeof(identity_file)); - fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Could not save your public key in %s\n", identity_file); - exit(1); - } - f = fdopen(fd, "w"); - if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - exit(1); - } - if (!key_write(public, f)) - fprintf(stderr, "write key failed\n"); + if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) + fatal("Unable to save public key to %s: %s", + identity_file, strerror(errno)); + if ((f = fdopen(fd, "w")) == NULL) + fatal("fdopen %s failed: %s", identity_file, strerror(errno)); + if ((r = sshkey_write(public, f)) != 0) + error("write key failed: %s", ssh_err(r)); fprintf(f, " %s\n", comment); fclose(f); if (!quiet) { - char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); - char *ra = key_fingerprint(public, SSH_FP_MD5, + fp = sshkey_fingerprint(public, fingerprint_hash, + SSH_FP_DEFAULT); + ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); + if (fp == NULL || ra == NULL) + fatal("sshkey_fingerprint failed"); printf("Your public key has been saved in %s.\n", identity_file); printf("The key fingerprint is:\n"); printf("%s %s\n", fp, comment); printf("The key's randomart image is:\n"); printf("%s\n", ra); - xfree(ra); - xfree(fp); + free(ra); + free(fp); } - key_free(public); + sshkey_free(public); exit(0); } diff --git a/ssh-keyscan.c b/ssh-keyscan.c index b085dd4..57d8842 100644 --- a/ssh-keyscan.c +++ b/ssh-keyscan.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-keyscan.c,v 1.85 2011/03/15 10:36:02 okan Exp $ */ +/* $OpenBSD: ssh-keyscan.c,v 1.101 2015/04/10 00:08:55 djm Exp $ */ /* * Copyright 1995, 1996 by David Mazieres . * @@ -9,6 +9,7 @@ #include "includes.h" +#include #include "openbsd-compat/sys-queue.h" #include #ifdef HAVE_SYS_TIME_H @@ -22,7 +23,6 @@ #include #include -#include #include #include #include @@ -33,8 +33,8 @@ #include "xmalloc.h" #include "ssh.h" #include "ssh1.h" -#include "buffer.h" -#include "key.h" +#include "sshbuf.h" +#include "sshkey.h" #include "cipher.h" #include "kex.h" #include "compat.h" @@ -45,6 +45,8 @@ #include "atomicio.h" #include "misc.h" #include "hostfile.h" +#include "ssherr.h" +#include "ssh_api.h" /* Flag indicating whether IPv4 or IPv6. This can be set on the command line. Default value is AF_UNSPEC means both IPv4 and IPv6. */ @@ -56,8 +58,9 @@ int ssh_port = SSH_DEFAULT_PORT; #define KT_DSA 2 #define KT_RSA 4 #define KT_ECDSA 8 +#define KT_ED25519 16 -int get_keytypes = KT_RSA; /* Get only RSA keys by default */ +int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519; int hash_hosts = 0; /* Hash hostname on output */ @@ -73,9 +76,8 @@ extern char *__progname; fd_set *read_wait; size_t read_wait_nfdset; int ncon; -int nonfatal_fatal = 0; -jmp_buf kexjmp; -Key *kexjmp_key; + +struct ssh *active_state = NULL; /* XXX needed for linking */ /* * Keep a connection structure for each file descriptor. The state @@ -92,12 +94,13 @@ typedef struct Connection { int c_len; /* Total bytes which must be read. */ int c_off; /* Length of data read so far. */ int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */ + sig_atomic_t c_done; /* SSH2 done */ char *c_namebase; /* Address to free for c_name and c_namelist */ char *c_name; /* Hostname of connection for errors */ char *c_namelist; /* Pointer to other possible addresses */ char *c_output_name; /* Hostname of connection for output */ char *c_data; /* Data read from this fd */ - Kex *c_kex; /* The key-exchange struct for ssh2 */ + struct ssh *c_ssh; /* SSH-connection */ struct timeval c_tv; /* Time at which connection gets aborted */ TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */ } con; @@ -105,6 +108,8 @@ typedef struct Connection { TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */ con *fdcon; +static void keyprint(con *c, struct sshkey *key); + static int fdlim_get(int hard) { @@ -181,45 +186,62 @@ strnnsep(char **stringp, char *delim) return (tok); } -static Key * +#ifdef WITH_SSH1 +static struct sshkey * keygrab_ssh1(con *c) { - static Key *rsa; - static Buffer msg; + static struct sshkey *rsa; + static struct sshbuf *msg; + int r; + u_char type; if (rsa == NULL) { - buffer_init(&msg); - rsa = key_new(KEY_RSA1); + if ((rsa = sshkey_new(KEY_RSA1)) == NULL) { + error("%s: sshkey_new failed", __func__); + return NULL; + } + if ((msg = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); } - buffer_append(&msg, c->c_data, c->c_plen); - buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */ - if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) { + if ((r = sshbuf_put(msg, c->c_data, c->c_plen)) != 0 || + (r = sshbuf_consume(msg, 8 - (c->c_plen & 7))) != 0 || /* padding */ + (r = sshbuf_get_u8(msg, &type)) != 0) + goto buf_err; + if (type != (int) SSH_SMSG_PUBLIC_KEY) { error("%s: invalid packet type", c->c_name); - buffer_clear(&msg); + sshbuf_reset(msg); + return NULL; + } + if ((r = sshbuf_consume(msg, 8)) != 0 || /* cookie */ + /* server key */ + (r = sshbuf_get_u32(msg, NULL)) != 0 || + (r = sshbuf_get_bignum1(msg, NULL)) != 0 || + (r = sshbuf_get_bignum1(msg, NULL)) != 0 || + /* host key */ + (r = sshbuf_get_u32(msg, NULL)) != 0 || + (r = sshbuf_get_bignum1(msg, rsa->rsa->e)) != 0 || + (r = sshbuf_get_bignum1(msg, rsa->rsa->n)) != 0) { + buf_err: + error("%s: buffer error: %s", __func__, ssh_err(r)); + sshbuf_reset(msg); return NULL; } - buffer_consume(&msg, 8); /* cookie */ - /* server key */ - (void) buffer_get_int(&msg); - buffer_get_bignum(&msg, rsa->rsa->e); - buffer_get_bignum(&msg, rsa->rsa->n); - - /* host key */ - (void) buffer_get_int(&msg); - buffer_get_bignum(&msg, rsa->rsa->e); - buffer_get_bignum(&msg, rsa->rsa->n); - - buffer_clear(&msg); + sshbuf_reset(msg); return (rsa); } +#endif static int -hostjump(Key *hostkey) +key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh) { - kexjmp_key = hostkey; - longjmp(kexjmp, 1); + con *c; + + if ((c = ssh_get_app_data(ssh)) != NULL) + keyprint(c, hostkey); + /* always abort key exchange */ + return -1; } static int @@ -238,51 +260,57 @@ ssh2_capable(int remote_major, int remote_minor) return 0; } -static Key * +static void keygrab_ssh2(con *c) { - int j; + char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; + int r; - packet_set_connection(c->c_fd, c->c_fd); enable_compat20(); - myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = c->c_keytype == KT_DSA? - "ssh-dss" : (c->c_keytype == KT_RSA ? "ssh-rsa" : - "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521"); - c->c_kex = kex_setup(myproposal); - c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; - c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; - c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; - c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; - c->c_kex->kex[KEX_ECDH_SHA2] = kexecdh_client; - c->c_kex->verify_host_key = hostjump; - - if (!(j = setjmp(kexjmp))) { - nonfatal_fatal = 1; - dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex); - fprintf(stderr, "Impossible! dispatch_run() returned!\n"); + myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = + c->c_keytype == KT_DSA ? "ssh-dss" : + (c->c_keytype == KT_RSA ? "ssh-rsa" : + (c->c_keytype == KT_ED25519 ? "ssh-ed25519" : + "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521")); + if ((r = kex_setup(c->c_ssh, myproposal)) != 0) { + free(c->c_ssh); + fprintf(stderr, "kex_setup: %s\n", ssh_err(r)); exit(1); } - nonfatal_fatal = 0; - xfree(c->c_kex); - c->c_kex = NULL; - packet_close(); - - return j < 0? NULL : kexjmp_key; +#ifdef WITH_OPENSSL + c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; + c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; + c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; + c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; +# ifdef OPENSSL_HAS_ECC + c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_client; +# endif +#endif + c->c_ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_client; + ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper); + /* + * do the key-exchange until an error occurs or until + * the key_print_wrapper() callback sets c_done. + */ + ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done, c->c_ssh); } static void -keyprint(con *c, Key *key) +keyprint(con *c, struct sshkey *key) { char *host = c->c_output_name ? c->c_output_name : c->c_name; + char *hostport = NULL; if (!key) return; if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL) fatal("host_hash failed"); - fprintf(stdout, "%s ", host); - key_write(key, stdout); + hostport = put_host_port(host, ssh_port); + fprintf(stdout, "%s ", hostport); + sshkey_write(key, stdout); fputs("\n", stdout); + free(hostport); } static int @@ -296,8 +324,10 @@ tcpconnect(char *host) memset(&hints, 0, sizeof(hints)); hints.ai_family = IPv4or6; hints.ai_socktype = SOCK_STREAM; - if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) - fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr)); + if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) { + error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr)); + return -1; + } for (ai = aitop; ai; ai = ai->ai_next) { s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (s < 0) { @@ -329,7 +359,7 @@ conalloc(char *iname, char *oname, int keytype) do { name = xstrsep(&namelist, ","); if (!name) { - xfree(namebase); + free(namebase); return (-1); } } while ((s = tcpconnect(name)) < 0); @@ -363,12 +393,17 @@ confree(int s) if (s >= maxfd || fdcon[s].c_status == CS_UNUSED) fatal("confree: attempt to free bad fdno %d", s); close(s); - xfree(fdcon[s].c_namebase); - xfree(fdcon[s].c_output_name); + free(fdcon[s].c_namebase); + free(fdcon[s].c_output_name); if (fdcon[s].c_status == CS_KEYS) - xfree(fdcon[s].c_data); + free(fdcon[s].c_data); fdcon[s].c_status = CS_UNUSED; fdcon[s].c_keytype = 0; + if (fdcon[s].c_ssh) { + ssh_packet_close(fdcon[s].c_ssh); + free(fdcon[s].c_ssh); + fdcon[s].c_ssh = NULL; + } TAILQ_REMOVE(&tq, &fdcon[s], c_link); FD_CLR(s, read_wait); ncon--; @@ -436,11 +471,15 @@ congreet(int s) return; } *cp = '\0'; + if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL) + fatal("ssh_packet_set_connection failed"); + ssh_packet_set_timeout(c->c_ssh, timeout, 1); + ssh_set_app_data(c->c_ssh, c); /* back link */ if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", &remote_major, &remote_minor, remote_version) == 3) - compat_datafellows(remote_version); + c->c_ssh->compat = compat_datafellows(remote_version); else - datafellows = 0; + c->c_ssh->compat = 0; if (c->c_keytype != KT_RSA1) { if (!ssh2_capable(remote_major, remote_minor)) { debug("%s doesn't support ssh2", c->c_name); @@ -452,7 +491,7 @@ congreet(int s) confree(s); return; } - fprintf(stderr, "# %s %s\n", c->c_name, chop(buf)); + fprintf(stderr, "# %s:%d %s\n", c->c_name, ssh_port, chop(buf)); n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n", c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2, c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2); @@ -467,7 +506,7 @@ congreet(int s) return; } if (c->c_keytype != KT_RSA1) { - keyprint(c, keygrab_ssh2(c)); + keygrab_ssh2(c); confree(s); return; } @@ -502,10 +541,12 @@ conread(int s) c->c_data = xmalloc(c->c_len); c->c_status = CS_KEYS; break; +#ifdef WITH_SSH1 case CS_KEYS: keyprint(c, keygrab_ssh1(c)); confree(s); return; +#endif default: fatal("conread: invalid status %d", c->c_status); break; @@ -553,8 +594,8 @@ conloop(void) } else if (FD_ISSET(i, r)) conread(i); } - xfree(r); - xfree(e); + free(r); + free(e); c = TAILQ_FIRST(&tq); while (c && (c->c_tv.tv_sec < now.tv_sec || @@ -574,7 +615,7 @@ do_host(char *host) if (name == NULL) return; - for (j = KT_RSA1; j <= KT_ECDSA; j *= 2) { + for (j = KT_RSA1; j <= KT_ED25519; j *= 2) { if (get_keytypes & j) { while (ncon >= MAXCON) conloop(); @@ -591,10 +632,7 @@ fatal(const char *fmt,...) va_start(args, fmt); do_log(SYSLOG_LEVEL_FATAL, fmt, args); va_end(args); - if (nonfatal_fatal) - longjmp(kexjmp, -1); - else - exit(255); + exit(255); } static void @@ -667,7 +705,7 @@ main(int argc, char **argv) get_keytypes = 0; tname = strtok(optarg, ","); while (tname) { - int type = key_type_from_name(tname); + int type = sshkey_type_from_name(tname); switch (type) { case KEY_RSA1: get_keytypes |= KT_RSA1; @@ -681,6 +719,9 @@ main(int argc, char **argv) case KEY_RSA: get_keytypes |= KT_RSA; break; + case KEY_ED25519: + get_keytypes |= KT_ED25519; + break; case KEY_UNSPEC: fatal("unknown key type %s", tname); } diff --git a/ssh-keysign.c b/ssh-keysign.c index 1deb7e1..1dca3e2 100644 --- a/ssh-keysign.c +++ b/ssh-keysign.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-keysign.c,v 1.36 2011/02/16 00:31:14 djm Exp $ */ +/* $OpenBSD: ssh-keysign.c,v 1.49 2015/07/03 03:56:25 djm Exp $ */ /* * Copyright (c) 2002 Markus Friedl. All rights reserved. * @@ -35,23 +35,29 @@ #include #include +#ifdef WITH_OPENSSL #include #include #include +#endif #include "xmalloc.h" #include "log.h" -#include "key.h" +#include "sshkey.h" #include "ssh.h" #include "ssh2.h" #include "misc.h" -#include "buffer.h" +#include "sshbuf.h" #include "authfile.h" #include "msg.h" #include "canohost.h" #include "pathnames.h" #include "readconf.h" #include "uidswap.h" +#include "sshkey.h" +#include "ssherr.h" + +struct ssh *active_state = NULL; /* XXX needed for linking */ /* XXX readconf.c needs these */ uid_t original_real_uid; @@ -59,87 +65,99 @@ uid_t original_real_uid; extern char *__progname; static int -valid_request(struct passwd *pw, char *host, Key **ret, u_char *data, - u_int datalen) +valid_request(struct passwd *pw, char *host, struct sshkey **ret, + u_char *data, size_t datalen) { - Buffer b; - Key *key = NULL; - u_char *pkblob; - u_int blen, len; - char *pkalg, *p; - int pktype, fail; + struct sshbuf *b; + struct sshkey *key = NULL; + u_char type, *pkblob; + char *p; + size_t blen, len; + char *pkalg, *luser; + int r, pktype, fail; + if (ret != NULL) + *ret = NULL; fail = 0; - buffer_init(&b); - buffer_append(&b, data, datalen); + if ((b = sshbuf_from(data, datalen)) == NULL) + fatal("%s: sshbuf_from failed", __func__); /* session id, currently limited to SHA1 (20 bytes) or SHA256 (32) */ - p = buffer_get_string(&b, &len); + if ((r = sshbuf_get_string(b, NULL, &len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (len != 20 && len != 32) fail++; - xfree(p); - if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST) + if ((r = sshbuf_get_u8(b, &type)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (type != SSH2_MSG_USERAUTH_REQUEST) fail++; /* server user */ - buffer_skip_string(&b); + if ((r = sshbuf_skip_string(b)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); /* service */ - p = buffer_get_string(&b, NULL); + if ((r = sshbuf_get_cstring(b, &p, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (strcmp("ssh-connection", p) != 0) fail++; - xfree(p); + free(p); /* method */ - p = buffer_get_string(&b, NULL); + if ((r = sshbuf_get_cstring(b, &p, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (strcmp("hostbased", p) != 0) fail++; - xfree(p); + free(p); /* pubkey */ - pkalg = buffer_get_string(&b, NULL); - pkblob = buffer_get_string(&b, &blen); + if ((r = sshbuf_get_cstring(b, &pkalg, NULL)) != 0 || + (r = sshbuf_get_string(b, &pkblob, &blen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - pktype = key_type_from_name(pkalg); + pktype = sshkey_type_from_name(pkalg); if (pktype == KEY_UNSPEC) fail++; - else if ((key = key_from_blob(pkblob, blen)) == NULL) + else if ((r = sshkey_from_blob(pkblob, blen, &key)) != 0) { + error("%s: bad key blob: %s", __func__, ssh_err(r)); fail++; - else if (key->type != pktype) + } else if (key->type != pktype) fail++; - xfree(pkalg); - xfree(pkblob); + free(pkalg); + free(pkblob); /* client host name, handle trailing dot */ - p = buffer_get_string(&b, &len); - debug2("valid_request: check expect chost %s got %s", host, p); + if ((r = sshbuf_get_cstring(b, &p, &len)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + debug2("%s: check expect chost %s got %s", __func__, host, p); if (strlen(host) != len - 1) fail++; else if (p[len - 1] != '.') fail++; else if (strncasecmp(host, p, len - 1) != 0) fail++; - xfree(p); + free(p); /* local user */ - p = buffer_get_string(&b, NULL); + if ((r = sshbuf_get_cstring(b, &luser, NULL)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); - if (strcmp(pw->pw_name, p) != 0) + if (strcmp(pw->pw_name, luser) != 0) fail++; - xfree(p); + free(luser); /* end of message */ - if (buffer_len(&b) != 0) + if (sshbuf_len(b) != 0) fail++; - buffer_free(&b); + sshbuf_free(b); - debug3("valid_request: fail %d", fail); + debug3("%s: fail %d", __func__, fail); if (fail && key != NULL) - key_free(key); - else + sshkey_free(key); + else if (ret != NULL) *ret = key; return (fail ? -1 : 0); @@ -148,16 +166,18 @@ valid_request(struct passwd *pw, char *host, Key **ret, u_char *data, int main(int argc, char **argv) { - Buffer b; + struct sshbuf *b; Options options; -#define NUM_KEYTYPES 3 - Key *keys[NUM_KEYTYPES], *key = NULL; +#define NUM_KEYTYPES 4 + struct sshkey *keys[NUM_KEYTYPES], *key = NULL; struct passwd *pw; - int key_fd[NUM_KEYTYPES], i, found, version = 2, fd; - u_char *signature, *data; - char *host; - u_int slen, dlen; + int r, key_fd[NUM_KEYTYPES], i, found, version = 2, fd; + u_char *signature, *data, rver; + char *host, *fp; + size_t slen, dlen; +#ifdef WITH_OPENSSL u_int32_t rnd[256]; +#endif /* Ensure that stdin and stdout are connected */ if ((fd = open(_PATH_DEVNULL, O_RDWR)) < 2) @@ -167,8 +187,10 @@ main(int argc, char **argv) close(fd); i = 0; + /* XXX This really needs to read sshd_config for the paths */ key_fd[i++] = open(_PATH_HOST_DSA_KEY_FILE, O_RDONLY); key_fd[i++] = open(_PATH_HOST_ECDSA_KEY_FILE, O_RDONLY); + key_fd[i++] = open(_PATH_HOST_ED25519_KEY_FILE, O_RDONLY); key_fd[i++] = open(_PATH_HOST_RSA_KEY_FILE, O_RDONLY); original_real_uid = getuid(); /* XXX readconf.c needs this */ @@ -179,7 +201,6 @@ main(int argc, char **argv) permanently_set_uid(pw); seed_rng(); - arc4random_stir(); #ifdef DEBUG_SSH_KEYSIGN log_init("ssh-keysign", SYSLOG_LEVEL_DEBUG3, SYSLOG_FACILITY_AUTH, 0); @@ -187,7 +208,7 @@ main(int argc, char **argv) /* verify that ssh-keysign is enabled by the admin */ initialize_options(&options); - (void)read_config_file(_PATH_HOST_CONFIG_FILE, "", &options, 0); + (void)read_config_file(_PATH_HOST_CONFIG_FILE, pw, "", "", &options, 0); fill_default_options(&options); if (options.enable_ssh_keysign != 1) fatal("ssh-keysign not enabled in %s", @@ -200,60 +221,76 @@ main(int argc, char **argv) if (found == 0) fatal("could not open any host key"); +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); - for (i = 0; i < 256; i++) - rnd[i] = arc4random(); + arc4random_buf(rnd, sizeof(rnd)); RAND_seed(rnd, sizeof(rnd)); +#endif found = 0; for (i = 0; i < NUM_KEYTYPES; i++) { keys[i] = NULL; if (key_fd[i] == -1) continue; - keys[i] = key_load_private_pem(key_fd[i], KEY_UNSPEC, - NULL, NULL); + r = sshkey_load_private_type_fd(key_fd[i], KEY_UNSPEC, + NULL, &key, NULL); close(key_fd[i]); - if (keys[i] != NULL) + if (r != 0) + debug("parse key %d: %s", i, ssh_err(r)); + else if (key != NULL) { + keys[i] = key; found = 1; + } } if (!found) fatal("no hostkey found"); - buffer_init(&b); - if (ssh_msg_recv(STDIN_FILENO, &b) < 0) + if ((b = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + if (ssh_msg_recv(STDIN_FILENO, b) < 0) fatal("ssh_msg_recv failed"); - if (buffer_get_char(&b) != version) - fatal("bad version"); - fd = buffer_get_int(&b); - if ((fd == STDIN_FILENO) || (fd == STDOUT_FILENO)) + if ((r = sshbuf_get_u8(b, &rver)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (rver != version) + fatal("bad version: received %d, expected %d", rver, version); + if ((r = sshbuf_get_u32(b, (u_int *)&fd)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (fd < 0 || fd == STDIN_FILENO || fd == STDOUT_FILENO) fatal("bad fd"); if ((host = get_local_name(fd)) == NULL) fatal("cannot get local name for fd"); - data = buffer_get_string(&b, &dlen); + if ((r = sshbuf_get_string(b, &data, &dlen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); if (valid_request(pw, host, &key, data, dlen) < 0) fatal("not a valid request"); - xfree(host); + free(host); found = 0; for (i = 0; i < NUM_KEYTYPES; i++) { if (keys[i] != NULL && - key_equal_public(key, keys[i])) { + sshkey_equal_public(key, keys[i])) { found = 1; break; } } - if (!found) - fatal("no matching hostkey found"); + if (!found) { + if ((fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) + fatal("%s: sshkey_fingerprint failed", __func__); + fatal("no matching hostkey found for key %s %s", + sshkey_type(key), fp ? fp : ""); + } - if (key_sign(keys[i], &signature, &slen, data, dlen) != 0) - fatal("key_sign failed"); - xfree(data); + if ((r = sshkey_sign(keys[i], &signature, &slen, data, dlen, 0)) != 0) + fatal("sshkey_sign failed: %s", ssh_err(r)); + free(data); /* send reply */ - buffer_clear(&b); - buffer_put_string(&b, signature, slen); - if (ssh_msg_send(STDOUT_FILENO, version, &b) == -1) + sshbuf_reset(b); + if ((r = sshbuf_put_string(b, signature, slen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (ssh_msg_send(STDOUT_FILENO, version, b) == -1) fatal("ssh_msg_send failed"); return (0); diff --git a/ssh-pkcs11-client.c b/ssh-pkcs11-client.c index 28f9235..cd34729 100644 --- a/ssh-pkcs11-client.c +++ b/ssh-pkcs11-client.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-pkcs11-client.c,v 1.2 2010/02/24 06:12:53 djm Exp $ */ +/* $OpenBSD: ssh-pkcs11-client.c,v 1.5 2014/06/24 01:13:21 djm Exp $ */ /* * Copyright (c) 2010 Markus Friedl. All rights reserved. * @@ -30,6 +30,8 @@ #include #include +#include + #include "pathnames.h" #include "xmalloc.h" #include "buffer.h" @@ -121,8 +123,9 @@ pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, buffer_put_string(&msg, blob, blen); buffer_put_string(&msg, from, flen); buffer_put_int(&msg, 0); - xfree(blob); + free(blob); send_msg(&msg); + buffer_clear(&msg); if (recv_msg(&msg) == SSH2_AGENT_SIGN_RESPONSE) { signature = buffer_get_string(&msg, &slen); @@ -130,8 +133,9 @@ pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, memcpy(to, signature, slen); ret = slen; } - xfree(signature); + free(signature); } + buffer_free(&msg); return (ret); } @@ -152,7 +156,6 @@ static int pkcs11_start_helper(void) { int pair[2]; - #ifdef WIN32_FIXME if (socketpair(pair) == -1) { @@ -183,9 +186,7 @@ pkcs11_start_helper(void) strerror(errno)); _exit(1); } - - #endif /*WIN32_FIXME*/ - + #endif /*WIN32_FIXME*/ close(pair[1]); fd = pair[0]; return (0); @@ -215,11 +216,11 @@ pkcs11_add_provider(char *name, char *pin, Key ***keysp) *keysp = xcalloc(nkeys, sizeof(Key *)); for (i = 0; i < nkeys; i++) { blob = buffer_get_string(&msg, &blen); - xfree(buffer_get_string(&msg, NULL)); + free(buffer_get_string(&msg, NULL)); k = key_from_blob(blob, blen); wrap_key(k->rsa); (*keysp)[i] = k; - xfree(blob); + free(blob); } } else { nkeys = -1; diff --git a/ssh-pkcs11-helper.c b/ssh-pkcs11-helper.c index cd33515..f2d5863 100644 --- a/ssh-pkcs11-helper.c +++ b/ssh-pkcs11-helper.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-pkcs11-helper.c,v 1.3 2010/02/24 06:12:53 djm Exp $ */ +/* $OpenBSD: ssh-pkcs11-helper.c,v 1.11 2015/08/20 22:32:42 deraadt Exp $ */ /* * Copyright (c) 2010 Markus Friedl. All rights reserved. * @@ -79,7 +79,7 @@ del_keys_by_name(char *name) nxt = TAILQ_NEXT(ki, next); if (!strcmp(ki->providername, name)) { TAILQ_REMOVE(&pkcs11_keylist, ki, next); - xfree(ki->providername); + free(ki->providername); key_free(ki->key); free(ki); } @@ -127,18 +127,19 @@ process_add(void) buffer_put_char(&msg, SSH2_AGENT_IDENTITIES_ANSWER); buffer_put_int(&msg, nkeys); for (i = 0; i < nkeys; i++) { - key_to_blob(keys[i], &blob, &blen); + if (key_to_blob(keys[i], &blob, &blen) == 0) + continue; buffer_put_string(&msg, blob, blen); buffer_put_cstring(&msg, name); - xfree(blob); + free(blob); add_key(keys[i], name); } - xfree(keys); + free(keys); } else { buffer_put_char(&msg, SSH_AGENT_FAILURE); } - xfree(pin); - xfree(name); + free(pin); + free(name); send_msg(&msg); buffer_free(&msg); } @@ -157,8 +158,8 @@ process_del(void) buffer_put_char(&msg, SSH_AGENT_SUCCESS); else buffer_put_char(&msg, SSH_AGENT_FAILURE); - xfree(pin); - xfree(name); + free(pin); + free(name); send_msg(&msg); buffer_free(&msg); } @@ -168,16 +169,19 @@ process_sign(void) { u_char *blob, *data, *signature = NULL; u_int blen, dlen, slen = 0; - int ok = -1, flags, ret; + int ok = -1; Key *key, *found; Buffer msg; blob = get_string(&blen); data = get_string(&dlen); - flags = get_int(); /* XXX ignore */ + (void)get_int(); /* XXX ignore flags */ if ((key = key_from_blob(blob, blen)) != NULL) { if ((found = lookup_key(key)) != NULL) { +#ifdef WITH_OPENSSL + int ret; + slen = RSA_size(key->rsa); signature = xmalloc(slen); if ((ret = RSA_private_encrypt(dlen, data, signature, @@ -185,6 +189,7 @@ process_sign(void) slen = ret; ok = 0; } +#endif /* WITH_OPENSSL */ } key_free(key); } @@ -195,10 +200,9 @@ process_sign(void) } else { buffer_put_char(&msg, SSH_AGENT_FAILURE); } - xfree(data); - xfree(blob); - if (signature != NULL) - xfree(signature); + free(data); + free(blob); + free(signature); send_msg(&msg); buffer_free(&msg); } @@ -274,7 +278,6 @@ main(int argc, char **argv) LogLevel log_level = SYSLOG_LEVEL_ERROR; char buf[4*4096]; - extern char *optarg; extern char *__progname; TAILQ_INIT(&pkcs11_keylist); @@ -298,8 +301,8 @@ main(int argc, char **argv) buffer_init(&oqueue); set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); - rset = (fd_set *)xmalloc(set_size); - wset = (fd_set *)xmalloc(set_size); + rset = xmalloc(set_size); + wset = xmalloc(set_size); for (;;) { memset(rset, 0, set_size); diff --git a/ssh-pkcs11.c b/ssh-pkcs11.c index c6a93b8..e725c10 100644 --- a/ssh-pkcs11.c +++ b/ssh-pkcs11.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-pkcs11.c,v 1.6 2010/06/08 21:32:19 markus Exp $ */ +/* $OpenBSD: ssh-pkcs11.c,v 1.21 2015/07/18 08:02:17 djm Exp $ */ /* * Copyright (c) 2010 Markus Friedl. All rights reserved. * @@ -36,12 +36,14 @@ #include "openbsd-compat/sys-queue.h" +#include + #define CRYPTOKI_COMPAT #include "pkcs11.h" #include "log.h" #include "misc.h" -#include "key.h" +#include "sshkey.h" #include "ssh-pkcs11.h" #include "xmalloc.h" @@ -64,7 +66,6 @@ struct pkcs11_provider { TAILQ_ENTRY(pkcs11_provider) next; }; - TAILQ_HEAD(, pkcs11_provider) pkcs11_providers; struct pkcs11_key { @@ -112,7 +113,7 @@ pkcs11_provider_finalize(struct pkcs11_provider *p) error("C_Finalize failed: %lu", rv); p->valid = 0; p->function_list = NULL; - + #ifdef WIN32_FIXME FreeLibrary(p -> handle); #else @@ -131,9 +132,9 @@ pkcs11_provider_unref(struct pkcs11_provider *p) if (--p->refcount <= 0) { if (p->valid) error("pkcs11_provider_unref: %p still valid", p); - xfree(p->slotlist); - xfree(p->slotinfo); - xfree(p); + free(p->slotlist); + free(p->slotinfo); + free(p); } } @@ -191,9 +192,8 @@ pkcs11_rsa_finish(RSA *rsa) rv = k11->orig_finish(rsa); if (k11->provider) pkcs11_provider_unref(k11->provider); - if (k11->keyid) - xfree(k11->keyid); - xfree(k11); + free(k11->keyid); + free(k11); } return (rv); } @@ -237,7 +237,7 @@ pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, CK_OBJECT_HANDLE obj; CK_ULONG tlen = 0; CK_RV rv; - CK_OBJECT_CLASS private_key_class = CKO_PRIVATE_KEY; + CK_OBJECT_CLASS private_key_class = CKO_PRIVATE_KEY; CK_BBOOL true_val = CK_TRUE; CK_MECHANISM mech = { CKM_RSA_PKCS, NULL_PTR, 0 @@ -247,11 +247,9 @@ pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, {CKA_ID, NULL, 0}, {CKA_SIGN, NULL, sizeof(true_val) } }; - char *pin, prompt[1024]; + char *pin = NULL, prompt[1024]; int rval = -1; - /* some compilers complain about non-constant initializer so we - use NULL in CK_ATTRIBUTE above and set the values here */ key_filter[0].pValue = &private_key_class; key_filter[2].pValue = &true_val; @@ -267,21 +265,30 @@ pkcs11_rsa_private_encrypt(int flen, const u_char *from, u_char *to, RSA *rsa, si = &k11->provider->slotinfo[k11->slotidx]; if ((si->token.flags & CKF_LOGIN_REQUIRED) && !si->logged_in) { if (!pkcs11_interactive) { - error("need pin"); + error("need pin entry%s", (si->token.flags & + CKF_PROTECTED_AUTHENTICATION_PATH) ? + " on reader keypad" : ""); return (-1); } - snprintf(prompt, sizeof(prompt), "Enter PIN for '%s': ", - si->token.label); - pin = read_passphrase(prompt, RP_ALLOW_EOF); - if (pin == NULL) - return (-1); /* bail out */ - if ((rv = f->C_Login(si->session, CKU_USER, pin, strlen(pin))) - != CKR_OK) { - xfree(pin); + if (si->token.flags & CKF_PROTECTED_AUTHENTICATION_PATH) + verbose("Deferring PIN entry to reader keypad."); + else { + snprintf(prompt, sizeof(prompt), + "Enter PIN for '%s': ", si->token.label); + pin = read_passphrase(prompt, RP_ALLOW_EOF); + if (pin == NULL) + return (-1); /* bail out */ + } + rv = f->C_Login(si->session, CKU_USER, (u_char *)pin, + (pin != NULL) ? strlen(pin) : 0); + if (pin != NULL) { + explicit_bzero(pin, strlen(pin)); + free(pin); + } + if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { error("C_Login failed: %lu", rv); return (-1); } - xfree(pin); si->logged_in = 1; } key_filter[1].pValue = k11->keyid; @@ -340,7 +347,7 @@ pkcs11_rsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, /* remove trailing spaces */ static void -rmspace(char *buf, size_t len) +rmspace(u_char *buf, size_t len) { size_t i; @@ -378,8 +385,9 @@ pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin) return (-1); } if (login_required && pin) { - if ((rv = f->C_Login(session, CKU_USER, pin, strlen(pin))) - != CKR_OK) { + rv = f->C_Login(session, CKU_USER, + (u_char *)pin, strlen(pin)); + if (rv != CKR_OK && rv != CKR_USER_ALREADY_LOGGED_IN) { error("C_Login failed: %lu", rv); if ((rv = f->C_CloseSession(session)) != CKR_OK) error("C_CloseSession failed: %lu", rv); @@ -396,36 +404,75 @@ pkcs11_open_session(struct pkcs11_provider *p, CK_ULONG slotidx, char *pin) * add 'wrapped' public keys to the 'keysp' array and increment nkeys. * keysp points to an (possibly empty) array with *nkeys keys. */ +static int pkcs11_fetch_keys_filter(struct pkcs11_provider *, CK_ULONG, + CK_ATTRIBUTE [], CK_ATTRIBUTE [3], struct sshkey ***, int *) + __attribute__((__bounded__(__minbytes__,4, 3 * sizeof(CK_ATTRIBUTE)))); + static int -pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, Key ***keysp, - int *nkeys) +pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, + struct sshkey ***keysp, int *nkeys) { - Key *key; + CK_OBJECT_CLASS pubkey_class = CKO_PUBLIC_KEY; + CK_OBJECT_CLASS cert_class = CKO_CERTIFICATE; + CK_ATTRIBUTE pubkey_filter[] = { + { CKA_CLASS, NULL, sizeof(pubkey_class) } + }; + CK_ATTRIBUTE cert_filter[] = { + { CKA_CLASS, NULL, sizeof(cert_class) } + }; + CK_ATTRIBUTE pubkey_attribs[] = { + { CKA_ID, NULL, 0 }, + { CKA_MODULUS, NULL, 0 }, + { CKA_PUBLIC_EXPONENT, NULL, 0 } + }; + CK_ATTRIBUTE cert_attribs[] = { + { CKA_ID, NULL, 0 }, + { CKA_SUBJECT, NULL, 0 }, + { CKA_VALUE, NULL, 0 } + }; + pubkey_filter[0].pValue = &pubkey_class; + cert_filter[0].pValue = &cert_class; + + if (pkcs11_fetch_keys_filter(p, slotidx, pubkey_filter, pubkey_attribs, + keysp, nkeys) < 0 || + pkcs11_fetch_keys_filter(p, slotidx, cert_filter, cert_attribs, + keysp, nkeys) < 0) + return (-1); + return (0); +} + +static int +pkcs11_key_included(struct sshkey ***keysp, int *nkeys, struct sshkey *key) +{ + int i; + + for (i = 0; i < *nkeys; i++) + if (sshkey_equal(key, (*keysp)[i])) + return (1); + return (0); +} + +static int +pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx, + CK_ATTRIBUTE filter[], CK_ATTRIBUTE attribs[3], + struct sshkey ***keysp, int *nkeys) +{ + struct sshkey *key; RSA *rsa; + X509 *x509; + EVP_PKEY *evp; int i; + const u_char *cp; CK_RV rv; CK_OBJECT_HANDLE obj; CK_ULONG nfound; CK_SESSION_HANDLE session; CK_FUNCTION_LIST *f; - CK_OBJECT_CLASS pubkey_class = CKO_PUBLIC_KEY; - CK_ATTRIBUTE pubkey_filter[] = { - { CKA_CLASS, NULL, sizeof(pubkey_class) } - }; - CK_ATTRIBUTE attribs[] = { - { CKA_ID, NULL, 0 }, - { CKA_MODULUS, NULL, 0 }, - { CKA_PUBLIC_EXPONENT, NULL, 0 } - }; - - /* some compilers complain about non-constant initializer so we - use NULL in CK_ATTRIBUTE above and set the value here */ - pubkey_filter[0].pValue = &pubkey_class; f = p->function_list; session = p->slotinfo[slotidx].session; /* setup a filter the looks for public keys */ - if ((rv = f->C_FindObjectsInit(session, pubkey_filter, 1)) != CKR_OK) { + if ((rv = f->C_FindObjectsInit(session, filter, 1)) != CKR_OK) { error("C_FindObjectsInit failed: %lu", rv); return (-1); } @@ -444,44 +491,79 @@ pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, Key ***keysp, error("C_GetAttributeValue failed: %lu", rv); continue; } - /* check that none of the attributes are zero length */ - if (attribs[0].ulValueLen == 0 || - attribs[1].ulValueLen == 0 || + /* + * Allow CKA_ID (always first attribute) to be empty, but + * ensure that none of the others are zero length. + * XXX assumes CKA_ID is always first. + */ + if (attribs[1].ulValueLen == 0 || attribs[2].ulValueLen == 0) { continue; } /* allocate buffers for attributes */ - for (i = 0; i < 3; i++) - attribs[i].pValue = xmalloc(attribs[i].ulValueLen); - /* retrieve ID, modulus and public exponent of RSA key */ + for (i = 0; i < 3; i++) { + if (attribs[i].ulValueLen > 0) { + attribs[i].pValue = xmalloc( + attribs[i].ulValueLen); + } + } + + /* + * retrieve ID, modulus and public exponent of RSA key, + * or ID, subject and value for certificates. + */ + rsa = NULL; if ((rv = f->C_GetAttributeValue(session, obj, attribs, 3)) != CKR_OK) { error("C_GetAttributeValue failed: %lu", rv); - } else if ((rsa = RSA_new()) == NULL) { - error("RSA_new failed"); + } else if (attribs[1].type == CKA_MODULUS ) { + if ((rsa = RSA_new()) == NULL) { + error("RSA_new failed"); + } else { + rsa->n = BN_bin2bn(attribs[1].pValue, + attribs[1].ulValueLen, NULL); + rsa->e = BN_bin2bn(attribs[2].pValue, + attribs[2].ulValueLen, NULL); + } } else { - rsa->n = BN_bin2bn(attribs[1].pValue, - attribs[1].ulValueLen, NULL); - rsa->e = BN_bin2bn(attribs[2].pValue, - attribs[2].ulValueLen, NULL); - if (rsa->n && rsa->e && - pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { - key = key_new(KEY_UNSPEC); - key->rsa = rsa; - key->type = KEY_RSA; - key->flags |= KEY_FLAG_EXT; + cp = attribs[2].pValue; + if ((x509 = X509_new()) == NULL) { + error("X509_new failed"); + } else if (d2i_X509(&x509, &cp, attribs[2].ulValueLen) + == NULL) { + error("d2i_X509 failed"); + } else if ((evp = X509_get_pubkey(x509)) == NULL || + evp->type != EVP_PKEY_RSA || + evp->pkey.rsa == NULL) { + debug("X509_get_pubkey failed or no rsa"); + } else if ((rsa = RSAPublicKey_dup(evp->pkey.rsa)) + == NULL) { + error("RSAPublicKey_dup"); + } + if (x509) + X509_free(x509); + } + if (rsa && rsa->n && rsa->e && + pkcs11_rsa_wrap(p, slotidx, &attribs[0], rsa) == 0) { + key = sshkey_new(KEY_UNSPEC); + key->rsa = rsa; + key->type = KEY_RSA; + key->flags |= SSHKEY_FLAG_EXT; + if (pkcs11_key_included(keysp, nkeys, key)) { + sshkey_free(key); + } else { /* expand key array and add key */ - *keysp = xrealloc(*keysp, *nkeys + 1, - sizeof(Key *)); + *keysp = xreallocarray(*keysp, *nkeys + 1, + sizeof(struct sshkey *)); (*keysp)[*nkeys] = key; *nkeys = *nkeys + 1; debug("have %d keys", *nkeys); - } else { - RSA_free(rsa); } + } else if (rsa) { + RSA_free(rsa); } for (i = 0; i < 3; i++) - xfree(attribs[i].pValue); + free(attribs[i].pValue); } if ((rv = f->C_FindObjectsFinal(session)) != CKR_OK) error("C_FindObjectsFinal failed: %lu", rv); @@ -490,7 +572,7 @@ pkcs11_fetch_keys(struct pkcs11_provider *p, CK_ULONG slotidx, Key ***keysp, /* register a new provider, fails if provider already exists */ int -pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) +pkcs11_add_provider(char *provider_id, char *pin, struct sshkey ***keyp) { int nkeys, need_finalize = 0; struct pkcs11_provider *p = NULL; @@ -507,8 +589,7 @@ pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) goto fail; } /* open shared pkcs11-libarary */ - - #ifdef WIN32_FIXME +#ifdef WIN32_FIXME handle = LoadLibrary(provider_id); @@ -529,7 +610,7 @@ pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) goto fail; } - #else +#else if ((handle = dlopen(provider_id, RTLD_NOW)) == NULL) { error("dlopen %s failed: %s", provider_id, dlerror()); goto fail; @@ -538,8 +619,8 @@ pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) error("dlsym(C_GetFunctionList) failed: %s", dlerror()); goto fail; } - #endif /*WIN32_FIXME*/ - +#endif /*WIN32_FIXME*/ + p = xcalloc(1, sizeof(*p)); p->name = xstrdup(provider_id); p->handle = handle; @@ -592,6 +673,11 @@ pkcs11_add_provider(char *provider_id, char *pin, Key ***keyp) error("C_GetTokenInfo failed: %lu", rv); continue; } + if ((token->flags & CKF_TOKEN_INITIALIZED) == 0) { + debug2("%s: ignoring uninitialised token in slot %lu", + __func__, (unsigned long)i); + continue; + } rmspace(token->label, sizeof(token->label)); rmspace(token->manufacturerID, sizeof(token->manufacturerID)); rmspace(token->model, sizeof(token->model)); @@ -615,20 +701,18 @@ fail: if (need_finalize && (rv = f->C_Finalize(NULL)) != CKR_OK) error("C_Finalize failed: %lu", rv); if (p) { - if (p->slotlist) - xfree(p->slotlist); - if (p->slotinfo) - xfree(p->slotinfo); - xfree(p); + free(p->slotlist); + free(p->slotinfo); + free(p); } - if (handle) - #ifdef WIN32_FIXME - FreeLibrary(handle); + if (handle) + FreeLibrary(handle); #else + if (handle) dlclose(handle); #endif/*WIN32_FIXME*/ - + return (-1); } diff --git a/ssh-pkcs11.h b/ssh-pkcs11.h index 59f456a..0ced74f 100644 --- a/ssh-pkcs11.h +++ b/ssh-pkcs11.h @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-pkcs11.h,v 1.2 2010/02/24 06:12:53 djm Exp $ */ +/* $OpenBSD: ssh-pkcs11.h,v 1.4 2015/01/15 09:40:00 djm Exp $ */ /* * Copyright (c) 2010 Markus Friedl. All rights reserved. * @@ -16,5 +16,9 @@ */ int pkcs11_init(int); void pkcs11_terminate(void); -int pkcs11_add_provider(char *, char *, Key ***); +int pkcs11_add_provider(char *, char *, struct sshkey ***); int pkcs11_del_provider(char *); + +#if !defined(WITH_OPENSSL) && defined(ENABLE_PKCS11) +#undef ENABLE_PKCS11 +#endif diff --git a/ssh-rsa.c b/ssh-rsa.c index c6355fa..cdc18a4 100644 --- a/ssh-rsa.c +++ b/ssh-rsa.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-rsa.c,v 1.45 2010/08/31 09:58:37 djm Exp $ */ +/* $OpenBSD: ssh-rsa.c,v 1.53 2015/06/15 01:32:50 djm Exp $ */ /* * Copyright (c) 2000, 2003 Markus Friedl * @@ -17,6 +17,8 @@ #include "includes.h" +#ifdef WITH_OPENSSL + #include #include @@ -25,154 +27,167 @@ #include #include -#include "xmalloc.h" -#include "log.h" -#include "buffer.h" -#include "key.h" +#include "sshbuf.h" #include "compat.h" -#include "misc.h" -#include "ssh.h" +#include "ssherr.h" +#define SSHKEY_INTERNAL +#include "sshkey.h" +#include "digest.h" -static int openssh_RSA_verify(int, u_char *, u_int, u_char *, u_int, RSA *); +static int openssh_RSA_verify(int, u_char *, size_t, u_char *, size_t, RSA *); /* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */ int -ssh_rsa_sign(const Key *key, u_char **sigp, u_int *lenp, - const u_char *data, u_int datalen) +ssh_rsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) { - const EVP_MD *evp_md; - EVP_MD_CTX md; - u_char digest[EVP_MAX_MD_SIZE], *sig; - u_int slen, dlen, len; - int ok, nid; - Buffer b; + int hash_alg; + u_char digest[SSH_DIGEST_MAX_LENGTH], *sig = NULL; + size_t slen; + u_int dlen, len; + int nid, ret = SSH_ERR_INTERNAL_ERROR; + struct sshbuf *b = NULL; - if (key == NULL || key->rsa == NULL || (key->type != KEY_RSA && - key->type != KEY_RSA_CERT && key->type != KEY_RSA_CERT_V00)) { - error("ssh_rsa_sign: no RSA key"); - return -1; - } - nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; - if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { - error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid); - return -1; - } - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); + if (lenp != NULL) + *lenp = 0; + if (sigp != NULL) + *sigp = NULL; + if (key == NULL || key->rsa == NULL || + sshkey_type_plain(key->type) != KEY_RSA) + return SSH_ERR_INVALID_ARGUMENT; slen = RSA_size(key->rsa); - sig = xmalloc(slen); + if (slen <= 0 || slen > SSHBUF_MAX_BIGNUM) + return SSH_ERR_INVALID_ARGUMENT; - ok = RSA_sign(nid, digest, dlen, sig, &len, key->rsa); - memset(digest, 'd', sizeof(digest)); + /* hash the data */ + hash_alg = SSH_DIGEST_SHA1; + nid = NID_sha1; + if ((dlen = ssh_digest_bytes(hash_alg)) == 0) + return SSH_ERR_INTERNAL_ERROR; + if ((ret = ssh_digest_memory(hash_alg, data, datalen, + digest, sizeof(digest))) != 0) + goto out; - if (ok != 1) { - int ecode = ERR_get_error(); + if ((sig = malloc(slen)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } - error("ssh_rsa_sign: RSA_sign failed: %s", - ERR_error_string(ecode, NULL)); - xfree(sig); - return -1; + if (RSA_sign(nid, digest, dlen, sig, &len, key->rsa) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; } if (len < slen) { - u_int diff = slen - len; - debug("slen %u > len %u", slen, len); + size_t diff = slen - len; memmove(sig + diff, sig, len); - memset(sig, 0, diff); + explicit_bzero(sig, diff); } else if (len > slen) { - error("ssh_rsa_sign: slen %u slen2 %u", slen, len); - xfree(sig); - return -1; + ret = SSH_ERR_INTERNAL_ERROR; + goto out; } /* encode signature */ - buffer_init(&b); - buffer_put_cstring(&b, "ssh-rsa"); - buffer_put_string(&b, sig, slen); - len = buffer_len(&b); + if ((b = sshbuf_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((ret = sshbuf_put_cstring(b, "ssh-rsa")) != 0 || + (ret = sshbuf_put_string(b, sig, slen)) != 0) + goto out; + len = sshbuf_len(b); + if (sigp != NULL) { + if ((*sigp = malloc(len)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(*sigp, sshbuf_ptr(b), len); + } if (lenp != NULL) *lenp = len; - if (sigp != NULL) { - *sigp = xmalloc(len); - memcpy(*sigp, buffer_ptr(&b), len); + ret = 0; + out: + explicit_bzero(digest, sizeof(digest)); + if (sig != NULL) { + explicit_bzero(sig, slen); + free(sig); } - buffer_free(&b); - memset(sig, 's', slen); - xfree(sig); - - return 0; + if (b != NULL) + sshbuf_free(b); + return ret; } int -ssh_rsa_verify(const Key *key, const u_char *signature, u_int signaturelen, - const u_char *data, u_int datalen) +ssh_rsa_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat) { - Buffer b; - const EVP_MD *evp_md; - EVP_MD_CTX md; - char *ktype; - u_char digest[EVP_MAX_MD_SIZE], *sigblob; - u_int len, dlen, modlen; - int rlen, ret, nid; + char *ktype = NULL; + int hash_alg, ret = SSH_ERR_INTERNAL_ERROR; + size_t len, diff, modlen, dlen; + struct sshbuf *b = NULL; + u_char digest[SSH_DIGEST_MAX_LENGTH], *osigblob, *sigblob = NULL; - if (key == NULL || key->rsa == NULL || (key->type != KEY_RSA && - key->type != KEY_RSA_CERT && key->type != KEY_RSA_CERT_V00)) { - error("ssh_rsa_verify: no RSA key"); - return -1; + if (key == NULL || key->rsa == NULL || + sshkey_type_plain(key->type) != KEY_RSA || + BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) + return SSH_ERR_INVALID_ARGUMENT; + + if ((b = sshbuf_from(signature, signaturelen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (sshbuf_get_cstring(b, &ktype, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; } - if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) { - error("ssh_rsa_verify: RSA modulus too small: %d < minimum %d bits", - BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE); - return -1; - } - buffer_init(&b); - buffer_append(&b, signature, signaturelen); - ktype = buffer_get_cstring(&b, NULL); if (strcmp("ssh-rsa", ktype) != 0) { - error("ssh_rsa_verify: cannot handle type %s", ktype); - buffer_free(&b); - xfree(ktype); - return -1; + ret = SSH_ERR_KEY_TYPE_MISMATCH; + goto out; } - xfree(ktype); - sigblob = buffer_get_string(&b, &len); - rlen = buffer_len(&b); - buffer_free(&b); - if (rlen != 0) { - error("ssh_rsa_verify: remaining bytes in signature %d", rlen); - xfree(sigblob); - return -1; + if (sshbuf_get_string(b, &sigblob, &len) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshbuf_len(b) != 0) { + ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; + goto out; } /* RSA_verify expects a signature of RSA_size */ modlen = RSA_size(key->rsa); if (len > modlen) { - error("ssh_rsa_verify: len %u > modlen %u", len, modlen); - xfree(sigblob); - return -1; + ret = SSH_ERR_KEY_BITS_MISMATCH; + goto out; } else if (len < modlen) { - u_int diff = modlen - len; - debug("ssh_rsa_verify: add padding: modlen %u > len %u", - modlen, len); - sigblob = xrealloc(sigblob, 1, modlen); + diff = modlen - len; + osigblob = sigblob; + if ((sigblob = realloc(sigblob, modlen)) == NULL) { + sigblob = osigblob; /* put it back for clear/free */ + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } memmove(sigblob + diff, sigblob, len); - memset(sigblob, 0, diff); + explicit_bzero(sigblob, diff); len = modlen; } - nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; - if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { - error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid); - xfree(sigblob); - return -1; + hash_alg = SSH_DIGEST_SHA1; + if ((dlen = ssh_digest_bytes(hash_alg)) == 0) { + ret = SSH_ERR_INTERNAL_ERROR; + goto out; } - EVP_DigestInit(&md, evp_md); - EVP_DigestUpdate(&md, data, datalen); - EVP_DigestFinal(&md, digest, &dlen); + if ((ret = ssh_digest_memory(hash_alg, data, datalen, + digest, sizeof(digest))) != 0) + goto out; - ret = openssh_RSA_verify(nid, digest, dlen, sigblob, len, key->rsa); - memset(digest, 'd', sizeof(digest)); - memset(sigblob, 's', len); - xfree(sigblob); - debug("ssh_rsa_verify: signature %scorrect", (ret==0) ? "in" : ""); + ret = openssh_RSA_verify(hash_alg, digest, dlen, sigblob, len, + key->rsa); + out: + if (sigblob != NULL) { + explicit_bzero(sigblob, len); + free(sigblob); + } + if (ktype != NULL) + free(ktype); + if (b != NULL) + sshbuf_free(b); + explicit_bzero(digest, sizeof(digest)); return ret; } @@ -193,76 +208,61 @@ static const u_char id_sha1[] = { 0x05, 0x00, /* NULL */ 0x04, 0x14 /* Octet string, length 0x14 (20), followed by sha1 hash */ }; -/* - * id-md5 OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) - * rsadsi(113549) digestAlgorithm(2) 5 } - */ -static const u_char id_md5[] = { - 0x30, 0x20, /* type Sequence, length 0x20 (32) */ - 0x30, 0x0c, /* type Sequence, length 0x09 */ - 0x06, 0x08, /* type OID, length 0x05 */ - 0x2a, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x05, /* id-md5 */ - 0x05, 0x00, /* NULL */ - 0x04, 0x10 /* Octet string, length 0x10 (16), followed by md5 hash */ -}; static int -openssh_RSA_verify(int type, u_char *hash, u_int hashlen, - u_char *sigbuf, u_int siglen, RSA *rsa) +openssh_RSA_verify(int hash_alg, u_char *hash, size_t hashlen, + u_char *sigbuf, size_t siglen, RSA *rsa) { - u_int ret, rsasize, oidlen = 0, hlen = 0; + size_t ret, rsasize = 0, oidlen = 0, hlen = 0; int len, oidmatch, hashmatch; const u_char *oid = NULL; u_char *decrypted = NULL; - ret = 0; - switch (type) { - case NID_sha1: + ret = SSH_ERR_INTERNAL_ERROR; + switch (hash_alg) { + case SSH_DIGEST_SHA1: oid = id_sha1; oidlen = sizeof(id_sha1); hlen = 20; break; - case NID_md5: - oid = id_md5; - oidlen = sizeof(id_md5); - hlen = 16; - break; default: goto done; } if (hashlen != hlen) { - error("bad hashlen"); + ret = SSH_ERR_INVALID_ARGUMENT; goto done; } rsasize = RSA_size(rsa); - if (siglen == 0 || siglen > rsasize) { - error("bad siglen"); + if (rsasize <= 0 || rsasize > SSHBUF_MAX_BIGNUM || + siglen == 0 || siglen > rsasize) { + ret = SSH_ERR_INVALID_ARGUMENT; + goto done; + } + if ((decrypted = malloc(rsasize)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; goto done; } - decrypted = xmalloc(rsasize); if ((len = RSA_public_decrypt(siglen, sigbuf, decrypted, rsa, RSA_PKCS1_PADDING)) < 0) { - error("RSA_public_decrypt failed: %s", - ERR_error_string(ERR_get_error(), NULL)); + ret = SSH_ERR_LIBCRYPTO_ERROR; goto done; } - if (len < 0 || (u_int)len != hlen + oidlen) { - error("bad decrypted len: %d != %d + %d", len, hlen, oidlen); + if (len < 0 || (size_t)len != hlen + oidlen) { + ret = SSH_ERR_INVALID_FORMAT; goto done; } oidmatch = timingsafe_bcmp(decrypted, oid, oidlen) == 0; hashmatch = timingsafe_bcmp(decrypted + oidlen, hash, hlen) == 0; - if (!oidmatch) { - error("oid mismatch"); + if (!oidmatch || !hashmatch) { + ret = SSH_ERR_SIGNATURE_INVALID; goto done; } - if (!hashmatch) { - error("hash mismatch"); - goto done; - } - ret = 1; + ret = 0; done: - if (decrypted) - xfree(decrypted); + if (decrypted) { + explicit_bzero(decrypted, rsasize); + free(decrypted); + } return ret; } +#endif /* WITH_OPENSSL */ diff --git a/ssh-sandbox.h b/ssh-sandbox.h index dfecd5a..bd5fd83 100644 --- a/ssh-sandbox.h +++ b/ssh-sandbox.h @@ -15,9 +15,10 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +struct monitor; struct ssh_sandbox; -struct ssh_sandbox *ssh_sandbox_init(void); +struct ssh_sandbox *ssh_sandbox_init(struct monitor *); void ssh_sandbox_child(struct ssh_sandbox *); void ssh_sandbox_parent_finish(struct ssh_sandbox *); void ssh_sandbox_parent_preauth(struct ssh_sandbox *, pid_t); diff --git a/ssh.c b/ssh.c index b326889..86350c0 100644 --- a/ssh.c +++ b/ssh.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh.c,v 1.364 2011/08/02 23:15:03 djm Exp $ */ +/* $OpenBSD: ssh.c,v 1.420 2015/07/30 00:01:34 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -48,7 +48,6 @@ #endif #include #include -#include #include #include @@ -67,12 +66,15 @@ #include #include #include +#include #include #include +#ifdef WITH_OPENSSL #include #include +#endif #include "openbsd-compat/openssl-compat.h" #include "openbsd-compat/sys-queue.h" @@ -83,6 +85,7 @@ #include "canohost.h" #include "compat.h" #include "cipher.h" +#include "digest.h" #include "packet.h" #include "buffer.h" #include "channels.h" @@ -93,9 +96,9 @@ #include "dispatch.h" #include "clientloop.h" #include "log.h" +#include "misc.h" #include "readconf.h" #include "sshconnect.h" -#include "misc.h" #include "kex.h" #include "mac.h" #include "sshpty.h" @@ -104,6 +107,8 @@ #include "uidswap.h" #include "roaming.h" #include "version.h" +#include "ssherr.h" +#include "myproposal.h" #ifdef ENABLE_PKCS11 #include "ssh-pkcs11.h" @@ -210,14 +215,14 @@ static void usage(void) { fprintf(stderr, -"usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]\n" -" [-D [bind_address:]port] [-e escape_char] [-F configfile]\n" -" [-I pkcs11] [-i identity_file]\n" -" [-L [bind_address:]port:host:hostport]\n" -" [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]\n" -" [-R [bind_address:]port:host:hostport] [-S ctl_path]\n" -" [-W host:port] [-w local_tun[:remote_tun]]\n" -" [user@]hostname [command]\n" +"usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]\n" +" [-D [bind_address:]port] [-E log_file] [-e escape_char]\n" +" [-F configfile] [-I pkcs11] [-i identity_file]\n" +" [-L address] [-l login_name] [-m mac_spec]\n" +" [-O ctl_cmd] [-o option] [-p port]\n" +" [-Q cipher | cipher-auth | mac | kex | key]\n" +" [-R address] [-S ctl_path] [-W host:port]\n" +" [-w local_tun[:remote_tun]] [user@]hostname [command]\n" ); exit(255); } @@ -240,7 +245,7 @@ tilde_expand_paths(char **paths, u_int num_paths) for (i = 0; i < num_paths; i++) { cp = tilde_expand_filename(paths[i], original_real_uid); - xfree(paths[i]); + free(paths[i]); paths[i] = cp; } } @@ -308,24 +313,289 @@ BOOL WINAPI CtrlHandlerRoutine(DWORD dwCtrlType) #endif /* WIN32_FIXME */ + +/* + * Attempt to resolve a host name / port to a set of addresses and + * optionally return any CNAMEs encountered along the way. + * Returns NULL on failure. + * NB. this function must operate with a options having undefined members. + */ +static struct addrinfo * +resolve_host(const char *name, int port, int logerr, char *cname, size_t clen) +{ + char strport[NI_MAXSERV]; + struct addrinfo hints, *res; + int gaierr, loglevel = SYSLOG_LEVEL_DEBUG1; + + if (port <= 0) + port = default_ssh_port(); + + snprintf(strport, sizeof strport, "%u", port); + memset(&hints, 0, sizeof(hints)); + hints.ai_family = options.address_family == -1 ? + AF_UNSPEC : options.address_family; + hints.ai_socktype = SOCK_STREAM; + if (cname != NULL) + hints.ai_flags = AI_CANONNAME; + if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) { + if (logerr || (gaierr != EAI_NONAME && gaierr != EAI_NODATA)) + loglevel = SYSLOG_LEVEL_ERROR; + do_log2(loglevel, "%s: Could not resolve hostname %.100s: %s", + __progname, name, ssh_gai_strerror(gaierr)); + return NULL; + } + if (cname != NULL && res->ai_canonname != NULL) { + if (strlcpy(cname, res->ai_canonname, clen) >= clen) { + error("%s: host \"%s\" cname \"%s\" too long (max %lu)", + __func__, name, res->ai_canonname, (u_long)clen); + if (clen > 0) + *cname = '\0'; + } + } + return res; +} + +/* + * Attempt to resolve a numeric host address / port to a single address. + * Returns a canonical address string. + * Returns NULL on failure. + * NB. this function must operate with a options having undefined members. + */ +static struct addrinfo * +resolve_addr(const char *name, int port, char *caddr, size_t clen) +{ + char addr[NI_MAXHOST], strport[NI_MAXSERV]; + struct addrinfo hints, *res; + int gaierr; + + if (port <= 0) + port = default_ssh_port(); + snprintf(strport, sizeof strport, "%u", port); + memset(&hints, 0, sizeof(hints)); + hints.ai_family = options.address_family == -1 ? + AF_UNSPEC : options.address_family; + hints.ai_socktype = SOCK_STREAM; + hints.ai_flags = AI_NUMERICHOST|AI_NUMERICSERV; + if ((gaierr = getaddrinfo(name, strport, &hints, &res)) != 0) { + debug2("%s: could not resolve name %.100s as address: %s", + __func__, name, ssh_gai_strerror(gaierr)); + return NULL; + } + if (res == NULL) { + debug("%s: getaddrinfo %.100s returned no addresses", + __func__, name); + return NULL; + } + if (res->ai_next != NULL) { + debug("%s: getaddrinfo %.100s returned multiple addresses", + __func__, name); + goto fail; + } + if ((gaierr = getnameinfo(res->ai_addr, res->ai_addrlen, + addr, sizeof(addr), NULL, 0, NI_NUMERICHOST)) != 0) { + debug("%s: Could not format address for name %.100s: %s", + __func__, name, ssh_gai_strerror(gaierr)); + goto fail; + } + if (strlcpy(caddr, addr, clen) >= clen) { + error("%s: host \"%s\" addr \"%s\" too long (max %lu)", + __func__, name, addr, (u_long)clen); + if (clen > 0) + *caddr = '\0'; + fail: + freeaddrinfo(res); + return NULL; + } + return res; +} + +/* + * Check whether the cname is a permitted replacement for the hostname + * and perform the replacement if it is. + * NB. this function must operate with a options having undefined members. + */ +static int +check_follow_cname(char **namep, const char *cname) +{ + int i; + struct allowed_cname *rule; + + if (*cname == '\0' || options.num_permitted_cnames == 0 || + strcmp(*namep, cname) == 0) + return 0; + if (options.canonicalize_hostname == SSH_CANONICALISE_NO) + return 0; + /* + * Don't attempt to canonicalize names that will be interpreted by + * a proxy unless the user specifically requests so. + */ + if (!option_clear_or_none(options.proxy_command) && + options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS) + return 0; + debug3("%s: check \"%s\" CNAME \"%s\"", __func__, *namep, cname); + for (i = 0; i < options.num_permitted_cnames; i++) { + rule = options.permitted_cnames + i; + if (match_pattern_list(*namep, rule->source_list, 1) != 1 || + match_pattern_list(cname, rule->target_list, 1) != 1) + continue; + verbose("Canonicalized DNS aliased hostname " + "\"%s\" => \"%s\"", *namep, cname); + free(*namep); + *namep = xstrdup(cname); + return 1; + } + return 0; +} + +/* + * Attempt to resolve the supplied hostname after applying the user's + * canonicalization rules. Returns the address list for the host or NULL + * if no name was found after canonicalization. + * NB. this function must operate with a options having undefined members. + */ +static struct addrinfo * +resolve_canonicalize(char **hostp, int port) +{ + int i, ndots; + char *cp, *fullhost, newname[NI_MAXHOST]; + struct addrinfo *addrs; + + if (options.canonicalize_hostname == SSH_CANONICALISE_NO) + return NULL; + + /* + * Don't attempt to canonicalize names that will be interpreted by + * a proxy unless the user specifically requests so. + */ + if (!option_clear_or_none(options.proxy_command) && + options.canonicalize_hostname != SSH_CANONICALISE_ALWAYS) + return NULL; + + /* Try numeric hostnames first */ + if ((addrs = resolve_addr(*hostp, port, + newname, sizeof(newname))) != NULL) { + debug2("%s: hostname %.100s is address", __func__, *hostp); + if (strcasecmp(*hostp, newname) != 0) { + debug2("%s: canonicalised address \"%s\" => \"%s\"", + __func__, *hostp, newname); + free(*hostp); + *hostp = xstrdup(newname); + } + return addrs; + } + + /* Don't apply canonicalization to sufficiently-qualified hostnames */ + ndots = 0; + for (cp = *hostp; *cp != '\0'; cp++) { + if (*cp == '.') + ndots++; + } + if (ndots > options.canonicalize_max_dots) { + debug3("%s: not canonicalizing hostname \"%s\" (max dots %d)", + __func__, *hostp, options.canonicalize_max_dots); + return NULL; + } + /* Attempt each supplied suffix */ + for (i = 0; i < options.num_canonical_domains; i++) { + *newname = '\0'; + xasprintf(&fullhost, "%s.%s.", *hostp, + options.canonical_domains[i]); + debug3("%s: attempting \"%s\" => \"%s\"", __func__, + *hostp, fullhost); + if ((addrs = resolve_host(fullhost, port, 0, + newname, sizeof(newname))) == NULL) { + free(fullhost); + continue; + } + /* Remove trailing '.' */ + fullhost[strlen(fullhost) - 1] = '\0'; + /* Follow CNAME if requested */ + if (!check_follow_cname(&fullhost, newname)) { + debug("Canonicalized hostname \"%s\" => \"%s\"", + *hostp, fullhost); + } + free(*hostp); + *hostp = fullhost; + return addrs; + } + if (!options.canonicalize_fallback_local) + fatal("%s: Could not resolve host \"%s\"", __progname, *hostp); + debug2("%s: host %s not found in any suffix", __func__, *hostp); + return NULL; +} + +/* + * Read per-user configuration file. Ignore the system wide config + * file if the user specifies a config file on the command line. + */ +static void +process_config_files(const char *host_arg, struct passwd *pw, int post_canon) +{ + char buf[PATH_MAX]; + int r; + + if (config != NULL) { + if (strcasecmp(config, "none") != 0 && + !read_config_file(config, pw, host, host_arg, &options, + SSHCONF_USERCONF | (post_canon ? SSHCONF_POSTCANON : 0))) + fatal("Can't open user config file %.100s: " + "%.100s", config, strerror(errno)); + } else { + r = snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, + _PATH_SSH_USER_CONFFILE); + if (r > 0 && (size_t)r < sizeof(buf)) + (void)read_config_file(buf, pw, host, host_arg, + &options, SSHCONF_CHECKPERM | SSHCONF_USERCONF | + (post_canon ? SSHCONF_POSTCANON : 0)); + + /* Read systemwide configuration file after user config. */ + (void)read_config_file(_PATH_HOST_CONFIG_FILE, pw, + host, host_arg, &options, + post_canon ? SSHCONF_POSTCANON : 0); + } +} + +/* Rewrite the port number in an addrinfo list of addresses */ +static void +set_addrinfo_port(struct addrinfo *addrs, int port) +{ + struct addrinfo *addr; + + for (addr = addrs; addr != NULL; addr = addr->ai_next) { + switch (addr->ai_family) { + case AF_INET: + ((struct sockaddr_in *)addr->ai_addr)-> + sin_port = htons(port); + break; + case AF_INET6: + ((struct sockaddr_in6 *)addr->ai_addr)-> + sin6_port = htons(port); + break; + } + } +} + /* * Main program for the ssh client. */ int main(int ac, char **av) { - int i, r, opt, exit_status, use_syslog; - char *p, *cp, *line, *argv0, buf[MAXPATHLEN], *host_arg; + int i, r, opt, exit_status, use_syslog, config_test = 0; + char *p, *cp, *line, *argv0, buf[PATH_MAX], *host_arg, *logfile; char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV]; + char cname[NI_MAXHOST]; struct stat st; struct passwd *pw; - int dummy, timeout_ms; + int timeout_ms; extern int optind, optreset; extern char *optarg; - - struct servent *sp; - Forward fwd; - + struct Forward fwd; + struct addrinfo *addrs = NULL; + struct ssh_digest_ctx *md; + u_char conn_hash[SSH_DIGEST_MAX_LENGTH]; + char *conn_hash_hex; + #ifdef WIN32_FIXME /* @@ -399,7 +669,7 @@ main(int ac, char **av) /* Get user data. */ pw = getpwuid(original_real_uid); if (!pw) { - logit("You don't exist, go away!"); + logit("No user exists for uid %lu", (u_long)original_real_uid); exit(255); } /* Take a copy of the returned structure. */ @@ -422,11 +692,12 @@ main(int ac, char **av) /* Parse command-line arguments. */ host = NULL; use_syslog = 0; + logfile = NULL; argv0 = av[0]; again: while ((opt = getopt(ac, av, "1246ab:c:e:fgi:kl:m:no:p:qstvx" - "ACD:F:I:KL:MNO:PR:S:TVw:W:XYy")) != -1) { + "ACD:E:F:GI:KL:MNO:PQ:R:S:TVw:W:XYy")) != -1) { switch (opt) { case '1': options.protocol = SSH_PROTO_1; @@ -456,12 +727,18 @@ main(int ac, char **av) case 'y': use_syslog = 1; break; + case 'E': + logfile = xstrdup(optarg); + break; + case 'G': + config_test = 1; + break; case 'Y': options.forward_x11 = 1; options.forward_x11_trusted = 1; break; case 'g': - options.gateway_ports = 1; + options.fwd_opts.gateway_ports = 1; break; case 'O': if (stdio_forward_host != NULL) @@ -477,12 +754,43 @@ main(int ac, char **av) muxclient_command = SSHMUX_COMMAND_TERMINATE; else if (strcmp(optarg, "stop") == 0) muxclient_command = SSHMUX_COMMAND_STOP; + else if (strcmp(optarg, "cancel") == 0) + muxclient_command = SSHMUX_COMMAND_CANCEL_FWD; else fatal("Invalid multiplex command."); break; case 'P': /* deprecated */ options.use_privileged_port = 0; break; + case 'Q': + cp = NULL; + if (strcmp(optarg, "cipher") == 0) + cp = cipher_alg_list('\n', 0); + else if (strcmp(optarg, "cipher-auth") == 0) + cp = cipher_alg_list('\n', 1); + else if (strcmp(optarg, "mac") == 0) + cp = mac_alg_list('\n'); + else if (strcmp(optarg, "kex") == 0) + cp = kex_alg_list('\n'); + else if (strcmp(optarg, "key") == 0) + cp = key_alg_list(0, 0); + else if (strcmp(optarg, "key-cert") == 0) + cp = key_alg_list(1, 0); + else if (strcmp(optarg, "key-plain") == 0) + cp = key_alg_list(0, 1); + else if (strcmp(optarg, "protocol-version") == 0) { +#ifdef WITH_SSH1 + cp = xstrdup("1\n2"); +#else + cp = xstrdup("2"); +#endif + } + if (cp == NULL) + fatal("Unsupported query \"%s\"", optarg); + printf("%s\n", cp); + free(cp); + exit(0); + break; case 'a': options.forward_agent = 0; break; @@ -503,12 +811,7 @@ main(int ac, char **av) strerror(errno)); break; } - if (options.num_identity_files >= - SSH_MAX_IDENTITY_FILES) - fatal("Too many identity files specified " - "(max %d)", SSH_MAX_IDENTITY_FILES); - options.identity_files[options.num_identity_files++] = - xstrdup(optarg); + add_identity_file(&options, NULL, optarg, 1); break; case 'I': #ifdef ENABLE_PKCS11 @@ -530,12 +833,17 @@ main(int ac, char **av) } else { if (options.log_level < SYSLOG_LEVEL_DEBUG3) options.log_level++; - break; } - /* FALLTHROUGH */ + break; case 'V': fprintf(stderr, "%s, %s\n", - SSH_RELEASE, SSLeay_version(SSLEAY_VERSION)); + SSH_RELEASE, +#ifdef WITH_OPENSSL + SSLeay_version(SSLEAY_VERSION) +#else + "without OpenSSL" +#endif + ); if (opt == 'V') exit(0); break; @@ -557,7 +865,7 @@ main(int ac, char **av) if (parse_forward(&fwd, optarg, 1, 0)) { stdio_forward_host = fwd.listen_host; stdio_forward_port = fwd.listen_port; - xfree(fwd.connect_host); + free(fwd.connect_host); } else { fprintf(stderr, "Bad stdio forwarding specification '%s'\n", @@ -588,26 +896,26 @@ main(int ac, char **av) } break; case 'c': - if (ciphers_valid(optarg)) { + if (ciphers_valid(*optarg == '+' ? + optarg + 1 : optarg)) { /* SSH2 only */ options.ciphers = xstrdup(optarg); options.cipher = SSH_CIPHER_INVALID; - } else { - /* SSH1 only */ - options.cipher = cipher_number(optarg); - if (options.cipher == -1) { - fprintf(stderr, - "Unknown cipher type '%s'\n", - optarg); - exit(255); - } - if (options.cipher == SSH_CIPHER_3DES) - options.ciphers = "3des-cbc"; - else if (options.cipher == SSH_CIPHER_BLOWFISH) - options.ciphers = "blowfish-cbc"; - else - options.ciphers = (char *)-1; + break; } + /* SSH1 only */ + options.cipher = cipher_number(optarg); + if (options.cipher == -1) { + fprintf(stderr, "Unknown cipher type '%s'\n", + optarg); + exit(255); + } + if (options.cipher == SSH_CIPHER_3DES) + options.ciphers = xstrdup("3des-cbc"); + else if (options.cipher == SSH_CIPHER_BLOWFISH) + options.ciphers = xstrdup("blowfish-cbc"); + else + options.ciphers = xstrdup(KEX_CLIENT_ENCRYPT); break; case 'm': if (mac_valid(optarg)) @@ -679,12 +987,12 @@ main(int ac, char **av) options.request_tty = REQUEST_TTY_NO; break; case 'o': - dummy = 1; line = xstrdup(optarg); - if (process_config_line(&options, host ? host : "", - line, "command-line", 0, &dummy) != 0) + if (process_config_line(&options, pw, + host ? host : "", host ? host : "", line, + "command-line", 0, NULL, SSHCONF_USERCONF) != 0) exit(255); - xfree(line); + free(line); break; case 's': subsystem_flag = 1; @@ -716,16 +1024,15 @@ main(int ac, char **av) usage(); options.user = p; *cp = '\0'; - host = ++cp; + host = xstrdup(++cp); } else - host = *av; + host = xstrdup(*av); if (ac > 1) { optind = optreset = 1; goto again; } ac--, av++; } - #ifdef WIN32_FIXME /* @@ -754,16 +1061,16 @@ main(int ac, char **av) if (!host) usage(); + host_arg = xstrdup(host); + +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); ERR_load_crypto_strings(); +#endif /* Initialize the command to execute on remote host. */ buffer_init(&command); - if (options.request_tty == REQUEST_TTY_YES || - options.request_tty == REQUEST_TTY_FORCE) - tty_flag = 1; - /* * Save the command to execute on the remote host in a buffer. There * is no limit on the length of the command, except by the maximum @@ -771,7 +1078,6 @@ main(int ac, char **av) */ if (!ac) { /* No command specified - execute shell on a tty. */ - tty_flag = options.request_tty != REQUEST_TTY_NO; if (subsystem_flag) { fprintf(stderr, "You must specify a subsystem to invoke.\n"); @@ -792,6 +1098,128 @@ main(int ac, char **av) fatal("Cannot fork into background without a command " "to execute."); + /* + * Initialize "log" output. Since we are the client all output + * goes to stderr unless otherwise specified by -y or -E. + */ + if (use_syslog && logfile != NULL) + fatal("Can't specify both -y and -E"); + if (logfile != NULL) { + log_redirect_stderr_to(logfile); + free(logfile); + } + log_init(argv0, + options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level, + SYSLOG_FACILITY_USER, !use_syslog); + + if (debug_flag) + logit("%s, %s", SSH_RELEASE, +#ifdef WITH_OPENSSL + SSLeay_version(SSLEAY_VERSION) +#else + "without OpenSSL" +#endif + ); + + /* Parse the configuration files */ + process_config_files(host_arg, pw, 0); + + /* Hostname canonicalisation needs a few options filled. */ + fill_default_options_for_canonicalization(&options); + + /* If the user has replaced the hostname then take it into use now */ + if (options.hostname != NULL) { + /* NB. Please keep in sync with readconf.c:match_cfg_line() */ + cp = percent_expand(options.hostname, + "h", host, (char *)NULL); + free(host); + host = cp; + free(options.hostname); + options.hostname = xstrdup(host); + } + + /* If canonicalization requested then try to apply it */ + lowercase(host); + if (options.canonicalize_hostname != SSH_CANONICALISE_NO) + addrs = resolve_canonicalize(&host, options.port); + + /* + * If CanonicalizePermittedCNAMEs have been specified but + * other canonicalization did not happen (by not being requested + * or by failing with fallback) then the hostname may still be changed + * as a result of CNAME following. + * + * Try to resolve the bare hostname name using the system resolver's + * usual search rules and then apply the CNAME follow rules. + * + * Skip the lookup if a ProxyCommand is being used unless the user + * has specifically requested canonicalisation for this case via + * CanonicalizeHostname=always + */ + if (addrs == NULL && options.num_permitted_cnames != 0 && + (option_clear_or_none(options.proxy_command) || + options.canonicalize_hostname == SSH_CANONICALISE_ALWAYS)) { + if ((addrs = resolve_host(host, options.port, + option_clear_or_none(options.proxy_command), + cname, sizeof(cname))) == NULL) { + /* Don't fatal proxied host names not in the DNS */ + if (option_clear_or_none(options.proxy_command)) + cleanup_exit(255); /* logged in resolve_host */ + } else + check_follow_cname(&host, cname); + } + + /* + * If canonicalisation is enabled then re-parse the configuration + * files as new stanzas may match. + */ + if (options.canonicalize_hostname != 0) { + debug("Re-reading configuration after hostname " + "canonicalisation"); + free(options.hostname); + options.hostname = xstrdup(host); + process_config_files(host_arg, pw, 1); + /* + * Address resolution happens early with canonicalisation + * enabled and the port number may have changed since, so + * reset it in address list + */ + if (addrs != NULL && options.port > 0) + set_addrinfo_port(addrs, options.port); + } + + /* Fill configuration defaults. */ + fill_default_options(&options); + + if (options.port == 0) + options.port = default_ssh_port(); + channel_set_af(options.address_family); + + /* Tidy and check options */ + if (options.host_key_alias != NULL) + lowercase(options.host_key_alias); + if (options.proxy_command != NULL && + strcmp(options.proxy_command, "-") == 0 && + options.proxy_use_fdpass) + fatal("ProxyCommand=- and ProxyUseFDPass are incompatible"); + if (options.control_persist && + options.update_hostkeys == SSH_UPDATE_HOSTKEYS_ASK) { + debug("UpdateHostKeys=ask is incompatible with ControlPersist; " + "disabling"); + options.update_hostkeys = 0; + } +#ifndef HAVE_CYGWIN + if (original_effective_uid != 0) + options.use_privileged_port = 0; +#endif + + /* reinit */ + log_init(argv0, options.log_level, SYSLOG_FACILITY_USER, !use_syslog); + + if (options.request_tty == REQUEST_TTY_YES || + options.request_tty == REQUEST_TTY_FORCE) + tty_flag = 1; + /* Allocate a tty by default if no command specified. */ if (buffer_len(&command) == 0) tty_flag = options.request_tty != REQUEST_TTY_NO; @@ -808,121 +1236,97 @@ main(int ac, char **av) tty_flag = 0; } - /* - * Initialize "log" output. Since we are the client all output - * actually goes to stderr. - */ - log_init(argv0, - options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level, - SYSLOG_FACILITY_USER, !use_syslog); - /* - * Read per-user configuration file. Ignore the system wide config - * file if the user specifies a config file on the command line. - */ - if (config != NULL) { - if (!read_config_file(config, host, &options, 0)) - fatal("Can't open user config file %.100s: " - "%.100s", config, strerror(errno)); - } else { - r = snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, - _PATH_SSH_USER_CONFFILE); - if (r > 0 && (size_t)r < sizeof(buf)) - (void)read_config_file(buf, host, &options, 1); - - /* Read systemwide configuration file after user config. */ - (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, - &options, 0); - } - - /* Fill configuration defaults. */ - fill_default_options(&options); - - channel_set_af(options.address_family); - - /* reinit */ - log_init(argv0, options.log_level, SYSLOG_FACILITY_USER, !use_syslog); - seed_rng(); if (options.user == NULL) options.user = xstrdup(pw->pw_name); - /* Get default port if port has not been set. */ - if (options.port == 0) { - sp = getservbyname(SSH_SERVICE_NAME, "tcp"); - options.port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT; - } - - /* preserve host name given on command line for %n expansion */ - host_arg = host; - if (options.hostname != NULL) { - host = percent_expand(options.hostname, - "h", host, (char *)NULL); - } - if (gethostname(thishost, sizeof(thishost)) == -1) fatal("gethostname: %s", strerror(errno)); strlcpy(shorthost, thishost, sizeof(shorthost)); shorthost[strcspn(thishost, ".")] = '\0'; snprintf(portstr, sizeof(portstr), "%d", options.port); + if ((md = ssh_digest_start(SSH_DIGEST_SHA1)) == NULL || + ssh_digest_update(md, thishost, strlen(thishost)) < 0 || + ssh_digest_update(md, host, strlen(host)) < 0 || + ssh_digest_update(md, portstr, strlen(portstr)) < 0 || + ssh_digest_update(md, options.user, strlen(options.user)) < 0 || + ssh_digest_final(md, conn_hash, sizeof(conn_hash)) < 0) + fatal("%s: mux digest failed", __func__); + ssh_digest_free(md); + conn_hash_hex = tohex(conn_hash, ssh_digest_bytes(SSH_DIGEST_SHA1)); + if (options.local_command != NULL) { debug3("expanding LocalCommand: %s", options.local_command); cp = options.local_command; - options.local_command = percent_expand(cp, "d", pw->pw_dir, - "h", host, "l", thishost, "n", host_arg, "r", options.user, - "p", portstr, "u", pw->pw_name, "L", shorthost, + options.local_command = percent_expand(cp, + "C", conn_hash_hex, + "L", shorthost, + "d", pw->pw_dir, + "h", host, + "l", thishost, + "n", host_arg, + "p", portstr, + "r", options.user, + "u", pw->pw_name, (char *)NULL); debug3("expanded LocalCommand: %s", options.local_command); - xfree(cp); - } - - /* force lowercase for hostkey matching */ - if (options.host_key_alias != NULL) { - for (p = options.host_key_alias; *p; p++) - if (isupper(*p)) - *p = (char)tolower(*p); - } - - if (options.proxy_command != NULL && - strcmp(options.proxy_command, "none") == 0) { - xfree(options.proxy_command); - options.proxy_command = NULL; - } - if (options.control_path != NULL && - strcmp(options.control_path, "none") == 0) { - xfree(options.control_path); - options.control_path = NULL; + free(cp); } if (options.control_path != NULL) { cp = tilde_expand_filename(options.control_path, original_real_uid); - xfree(options.control_path); - options.control_path = percent_expand(cp, "h", host, - "l", thishost, "n", host_arg, "r", options.user, - "p", portstr, "u", pw->pw_name, "L", shorthost, + free(options.control_path); + options.control_path = percent_expand(cp, + "C", conn_hash_hex, + "L", shorthost, + "h", host, + "l", thishost, + "n", host_arg, + "p", portstr, + "r", options.user, + "u", pw->pw_name, (char *)NULL); - xfree(cp); + free(cp); } + free(conn_hash_hex); + + if (config_test) { + dump_client_config(&options, host); + exit(0); + } + if (muxclient_command != 0 && options.control_path == NULL) fatal("No ControlPath specified for \"-O\" command"); if (options.control_path != NULL) muxclient(options.control_path); + /* + * If hostname canonicalisation was not enabled, then we may not + * have yet resolved the hostname. Do so now. + */ + if (addrs == NULL && options.proxy_command == NULL) { + if ((addrs = resolve_host(host, options.port, 1, + cname, sizeof(cname))) == NULL) + cleanup_exit(255); /* resolve_host logs the error */ + } + timeout_ms = options.connection_timeout * 1000; /* Open a connection to the remote host. */ - if (ssh_connect(host, &hostaddr, options.port, - options.address_family, options.connection_attempts, &timeout_ms, - options.tcp_keep_alive, -#ifdef HAVE_CYGWIN - options.use_privileged_port, -#else - original_effective_uid == 0 && options.use_privileged_port, -#endif - options.proxy_command) != 0) - exit(255); + if (ssh_connect(host, addrs, &hostaddr, options.port, + options.address_family, options.connection_attempts, + &timeout_ms, options.tcp_keep_alive, + options.use_privileged_port) != 0) + exit(255); + + if (addrs != NULL) + freeaddrinfo(addrs); + + packet_set_timeout(options.server_alive_interval, + options.server_alive_count_max); if (timeout_ms > 0) debug3("timeout: %d ms remain after connect", timeout_ms); @@ -940,7 +1344,7 @@ main(int ac, char **av) sensitive_data.external_keysign = 0; if (options.rhosts_rsa_authentication || options.hostbased_authentication) { - sensitive_data.nkeys = 7; + sensitive_data.nkeys = 9; sensitive_data.keys = xcalloc(sensitive_data.nkeys, sizeof(Key)); for (i = 0; i < sensitive_data.nkeys; i++) @@ -949,45 +1353,54 @@ main(int ac, char **av) PRIV_START; sensitive_data.keys[0] = key_load_private_type(KEY_RSA1, _PATH_HOST_KEY_FILE, "", NULL, NULL); - sensitive_data.keys[1] = key_load_private_cert(KEY_DSA, - _PATH_HOST_DSA_KEY_FILE, "", NULL); #ifdef OPENSSL_HAS_ECC - sensitive_data.keys[2] = key_load_private_cert(KEY_ECDSA, + sensitive_data.keys[1] = key_load_private_cert(KEY_ECDSA, _PATH_HOST_ECDSA_KEY_FILE, "", NULL); #endif + sensitive_data.keys[2] = key_load_private_cert(KEY_ED25519, + _PATH_HOST_ED25519_KEY_FILE, "", NULL); sensitive_data.keys[3] = key_load_private_cert(KEY_RSA, _PATH_HOST_RSA_KEY_FILE, "", NULL); - sensitive_data.keys[4] = key_load_private_type(KEY_DSA, - _PATH_HOST_DSA_KEY_FILE, "", NULL, NULL); + sensitive_data.keys[4] = key_load_private_cert(KEY_DSA, + _PATH_HOST_DSA_KEY_FILE, "", NULL); #ifdef OPENSSL_HAS_ECC sensitive_data.keys[5] = key_load_private_type(KEY_ECDSA, _PATH_HOST_ECDSA_KEY_FILE, "", NULL, NULL); #endif - sensitive_data.keys[6] = key_load_private_type(KEY_RSA, + sensitive_data.keys[6] = key_load_private_type(KEY_ED25519, + _PATH_HOST_ED25519_KEY_FILE, "", NULL, NULL); + sensitive_data.keys[7] = key_load_private_type(KEY_RSA, _PATH_HOST_RSA_KEY_FILE, "", NULL, NULL); + sensitive_data.keys[8] = key_load_private_type(KEY_DSA, + _PATH_HOST_DSA_KEY_FILE, "", NULL, NULL); PRIV_END; if (options.hostbased_authentication == 1 && sensitive_data.keys[0] == NULL && - sensitive_data.keys[4] == NULL && sensitive_data.keys[5] == NULL && - sensitive_data.keys[6] == NULL) { - sensitive_data.keys[1] = key_load_cert( - _PATH_HOST_DSA_KEY_FILE); + sensitive_data.keys[6] == NULL && + sensitive_data.keys[7] == NULL && + sensitive_data.keys[8] == NULL) { #ifdef OPENSSL_HAS_ECC - sensitive_data.keys[2] = key_load_cert( + sensitive_data.keys[1] = key_load_cert( _PATH_HOST_ECDSA_KEY_FILE); #endif + sensitive_data.keys[2] = key_load_cert( + _PATH_HOST_ED25519_KEY_FILE); sensitive_data.keys[3] = key_load_cert( _PATH_HOST_RSA_KEY_FILE); - sensitive_data.keys[4] = key_load_public( - _PATH_HOST_DSA_KEY_FILE, NULL); + sensitive_data.keys[4] = key_load_cert( + _PATH_HOST_DSA_KEY_FILE); #ifdef OPENSSL_HAS_ECC sensitive_data.keys[5] = key_load_public( _PATH_HOST_ECDSA_KEY_FILE, NULL); #endif sensitive_data.keys[6] = key_load_public( + _PATH_HOST_ED25519_KEY_FILE, NULL); + sensitive_data.keys[7] = key_load_public( _PATH_HOST_RSA_KEY_FILE, NULL); + sensitive_data.keys[8] = key_load_public( + _PATH_HOST_DSA_KEY_FILE, NULL); sensitive_data.external_keysign = 1; } } @@ -1007,6 +1420,7 @@ main(int ac, char **av) * Now that we are back to our own permissions, create ~/.ssh * directory if it doesn't already exist. */ + if (config == NULL) { #ifdef WIN32_FIXME r = snprintf(buf, sizeof(buf), "%ls%s%s", pw -> pw_dir, wcscmp(pw -> pw_dir, L"/") ? "/" : "", @@ -1016,21 +1430,21 @@ main(int ac, char **av) strcmp(pw->pw_dir, "/") ? "/" : "", _PATH_SSH_USER_DIR); #endif - if (r > 0 && (size_t)r < sizeof(buf) && stat(buf, &st) < 0) { + if (r > 0 && (size_t)r < sizeof(buf) && stat(buf, &st) < 0) { #ifdef WITH_SELINUX - ssh_selinux_setfscreatecon(buf); + ssh_selinux_setfscreatecon(buf); #endif - if (mkdir(buf, 0700) < 0) - error("Could not create directory '%.200s'.", buf); + if (mkdir(buf, 0700) < 0) + error("Could not create directory '%.200s'.", + buf); #ifdef WITH_SELINUX - ssh_selinux_setfscreatecon(NULL); + ssh_selinux_setfscreatecon(NULL); #endif + } } - #ifdef WIN32_FIXME SetFileAttributes(buf, FILE_ATTRIBUTE_HIDDEN); #endif - /* load options.identity_files */ load_public_identity_files(); @@ -1038,7 +1452,7 @@ main(int ac, char **av) tilde_expand_paths(options.system_hostfiles, options.num_system_hostfiles); tilde_expand_paths(options.user_hostfiles, options.num_user_hostfiles); - + #ifndef WIN32_FIXME signal(SIGPIPE, SIG_IGN); /* ignore SIGPIPE early */ signal(SIGCHLD, main_sigchld_handler); @@ -1065,13 +1479,11 @@ main(int ac, char **av) sensitive_data.keys[i] = NULL; } } - xfree(sensitive_data.keys); + free(sensitive_data.keys); } for (i = 0; i < options.num_identity_files; i++) { - if (options.identity_files[i]) { - xfree(options.identity_files[i]); - options.identity_files[i] = NULL; - } + free(options.identity_files[i]); + options.identity_files[i] = NULL; if (options.identity_keys[i]) { key_free(options.identity_keys[i]); options.identity_keys[i] = NULL; @@ -1098,9 +1510,8 @@ main(int ac, char **av) /* Kill ProxyCommand if it is running. */ ssh_kill_proxy_command(); +#endif - #endif - return exit_status; } @@ -1146,6 +1557,7 @@ control_persist_detach(void) if (devnull > STDERR_FILENO) close(devnull); } + daemon(1, 1); setproctitle("%s [mux]", options.control_path); #endif } @@ -1166,26 +1578,45 @@ fork_postauth(void) static void ssh_confirm_remote_forward(int type, u_int32_t seq, void *ctxt) { - Forward *rfwd = (Forward *)ctxt; + struct Forward *rfwd = (struct Forward *)ctxt; /* XXX verbose() on failure? */ - debug("remote forward %s for: listen %d, connect %s:%d", + debug("remote forward %s for: listen %s%s%d, connect %s:%d", type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure", - rfwd->listen_port, rfwd->connect_host, rfwd->connect_port); - if (type == SSH2_MSG_REQUEST_SUCCESS && rfwd->listen_port == 0) { - rfwd->allocated_port = packet_get_int(); - logit("Allocated port %u for remote forward to %s:%d", - rfwd->allocated_port, - rfwd->connect_host, rfwd->connect_port); + rfwd->listen_path ? rfwd->listen_path : + rfwd->listen_host ? rfwd->listen_host : "", + (rfwd->listen_path || rfwd->listen_host) ? ":" : "", + rfwd->listen_port, rfwd->connect_path ? rfwd->connect_path : + rfwd->connect_host, rfwd->connect_port); + if (rfwd->listen_path == NULL && rfwd->listen_port == 0) { + if (type == SSH2_MSG_REQUEST_SUCCESS) { + rfwd->allocated_port = packet_get_int(); + logit("Allocated port %u for remote forward to %s:%d", + rfwd->allocated_port, + rfwd->connect_host, rfwd->connect_port); + channel_update_permitted_opens(rfwd->handle, + rfwd->allocated_port); + } else { + channel_update_permitted_opens(rfwd->handle, -1); + } } if (type == SSH2_MSG_REQUEST_FAILURE) { - if (options.exit_on_forward_failure) - fatal("Error: remote port forwarding failed for " - "listen port %d", rfwd->listen_port); - else - logit("Warning: remote port forwarding failed for " - "listen port %d", rfwd->listen_port); + if (options.exit_on_forward_failure) { + if (rfwd->listen_path != NULL) + fatal("Error: remote port forwarding failed " + "for listen path %s", rfwd->listen_path); + else + fatal("Error: remote port forwarding failed " + "for listen port %d", rfwd->listen_port); + } else { + if (rfwd->listen_path != NULL) + logit("Warning: remote port forwarding failed " + "for listen path %s", rfwd->listen_path); + else + logit("Warning: remote port forwarding failed " + "for listen port %d", rfwd->listen_port); + } } if (++remote_forward_confirms_received == options.num_remote_forwards) { debug("All remote forwarding requests processed"); @@ -1201,25 +1632,34 @@ client_cleanup_stdio_fwd(int id, void *arg) cleanup_exit(0); } -static int -client_setup_stdio_fwd(const char *host_to_connect, u_short port_to_connect) +static void +ssh_stdio_confirm(int id, int success, void *arg) +{ + if (!success) + fatal("stdio forwarding failed"); +} + +static void +ssh_init_stdio_forwarding(void) { Channel *c; int in, out; - debug3("client_setup_stdio_fwd %s:%d", host_to_connect, - port_to_connect); + if (stdio_forward_host == NULL) + return; + if (!compat20) + fatal("stdio forwarding require Protocol 2"); - in = dup(STDIN_FILENO); - out = dup(STDOUT_FILENO); - if (in < 0 || out < 0) + debug3("%s: %s:%d", __func__, stdio_forward_host, stdio_forward_port); + + if ((in = dup(STDIN_FILENO)) < 0 || + (out = dup(STDOUT_FILENO)) < 0) fatal("channel_connect_stdio_fwd: dup() in/out failed"); - - if ((c = channel_connect_stdio_fwd(host_to_connect, port_to_connect, - in, out)) == NULL) - return 0; + if ((c = channel_connect_stdio_fwd(stdio_forward_host, + stdio_forward_port, in, out)) == NULL) + fatal("%s: channel_connect_stdio_fwd failed", __func__); channel_register_cleanup(c->self, client_cleanup_stdio_fwd, 0); - return 1; + channel_register_open_confirm(c->self, ssh_stdio_confirm, NULL); } static void @@ -1228,31 +1668,22 @@ ssh_init_forwarding(void) int success = 0; int i; - if (stdio_forward_host != NULL) { - if (!compat20) { - fatal("stdio forwarding require Protocol 2"); - } - if (!client_setup_stdio_fwd(stdio_forward_host, - stdio_forward_port)) - fatal("Failed to connect in stdio forward mode."); - } - /* Initiate local TCP/IP port forwardings. */ for (i = 0; i < options.num_local_forwards; i++) { debug("Local connections to %.200s:%d forwarded to remote " "address %.200s:%d", + (options.local_forwards[i].listen_path != NULL) ? + options.local_forwards[i].listen_path : (options.local_forwards[i].listen_host == NULL) ? - (options.gateway_ports ? "*" : "LOCALHOST") : + (options.fwd_opts.gateway_ports ? "*" : "LOCALHOST") : options.local_forwards[i].listen_host, options.local_forwards[i].listen_port, + (options.local_forwards[i].connect_path != NULL) ? + options.local_forwards[i].connect_path : options.local_forwards[i].connect_host, options.local_forwards[i].connect_port); success += channel_setup_local_fwd_listener( - options.local_forwards[i].listen_host, - options.local_forwards[i].listen_port, - options.local_forwards[i].connect_host, - options.local_forwards[i].connect_port, - options.gateway_ports); + &options.local_forwards[i], &options.fwd_opts); } if (i > 0 && success != i && options.exit_on_forward_failure) fatal("Could not request local forwarding."); @@ -1263,24 +1694,28 @@ ssh_init_forwarding(void) for (i = 0; i < options.num_remote_forwards; i++) { debug("Remote connections from %.200s:%d forwarded to " "local address %.200s:%d", + (options.remote_forwards[i].listen_path != NULL) ? + options.remote_forwards[i].listen_path : (options.remote_forwards[i].listen_host == NULL) ? "LOCALHOST" : options.remote_forwards[i].listen_host, options.remote_forwards[i].listen_port, + (options.remote_forwards[i].connect_path != NULL) ? + options.remote_forwards[i].connect_path : options.remote_forwards[i].connect_host, options.remote_forwards[i].connect_port); - if (channel_request_remote_forwarding( - options.remote_forwards[i].listen_host, - options.remote_forwards[i].listen_port, - options.remote_forwards[i].connect_host, - options.remote_forwards[i].connect_port) < 0) { + options.remote_forwards[i].handle = + channel_request_remote_forwarding( + &options.remote_forwards[i]); + if (options.remote_forwards[i].handle < 0) { if (options.exit_on_forward_failure) fatal("Could not request remote forwarding."); else logit("Warning: Could not request remote " "forwarding."); + } else { + client_register_global_confirm(ssh_confirm_remote_forward, + &options.remote_forwards[i]); } - client_register_global_confirm(ssh_confirm_remote_forward, - &options.remote_forwards[i]); } /* Initiate tunnel forwarding. */ @@ -1298,10 +1733,16 @@ ssh_init_forwarding(void) static void check_agent_present(void) { + int r; + if (options.forward_agent) { /* Clear agent forwarding if we don't have an agent. */ - if (!ssh_agent_present()) + if ((r = ssh_get_authentication_socket(NULL)) != 0) { options.forward_agent = 0; + if (r != SSH_ERR_AGENT_NOT_PRESENT) + debug("ssh_get_authentication_socket: %s", + ssh_err(r)); + } } } @@ -1311,11 +1752,10 @@ ssh_session(void) int type; int interactive = 0; int have_tty = 0; - + struct winsize ws; #ifndef WIN32_FIXME struct winsize ws; #endif - char *cp; const char *display; @@ -1358,7 +1798,7 @@ ssh_session(void) packet_put_cstring(cp); /* Store window size in the packet. */ - + #ifdef WIN32_FIXME packet_put_int((u_int) 25); /*row*/ @@ -1367,16 +1807,14 @@ ssh_session(void) packet_put_int((u_int) 480); /*ypixel*/ #else - if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) memset(&ws, 0, sizeof(ws)); packet_put_int((u_int)ws.ws_row); packet_put_int((u_int)ws.ws_col); packet_put_int((u_int)ws.ws_xpixel); packet_put_int((u_int)ws.ws_ypixel); +#endif - #endif - /* Store tty modes in the packet. */ tty_make_modes(fileno(stdin), NULL); @@ -1398,11 +1836,13 @@ ssh_session(void) } /* Request X11 forwarding if enabled and DISPLAY is set. */ display = getenv("DISPLAY"); + if (display == NULL && options.forward_x11) + debug("X11 forwarding requested but DISPLAY not set"); if (options.forward_x11 && display != NULL) { char *proto, *data; /* Get reasonable local authentication information. */ client_x11_get_proto(display, options.xauth_location, - options.forward_x11_trusted, + options.forward_x11_trusted, options.forward_x11_timeout, &proto, &data); /* Request forwarding with authentication spoofing. */ @@ -1440,6 +1880,7 @@ ssh_session(void) } /* Initiate port forwardings. */ + ssh_init_stdio_forwarding(); ssh_init_forwarding(); /* Execute a local command */ @@ -1498,6 +1939,8 @@ ssh_session2_setup(int id, int success, void *arg) return; /* No need for error message, channels code sens one */ display = getenv("DISPLAY"); + if (display == NULL && options.forward_x11) + debug("X11 forwarding requested but DISPLAY not set"); if (options.forward_x11 && display != NULL) { char *proto, *data; /* Get reasonable local authentication information. */ @@ -1521,6 +1964,10 @@ ssh_session2_setup(int id, int success, void *arg) packet_send(); } + /* Tell the packet module whether this is an interactive session. */ + packet_set_interactive(interactive, + options.ip_qos_interactive, options.ip_qos_bulk); + client_session2_setup(id, tty_flag, subsystem_flag, getenv("TERM"), NULL, fileno(stdin), &command, environ); } @@ -1578,15 +2025,18 @@ ssh_session2(void) int id = -1; /* XXX should be pre-session */ + if (!options.control_persist) + ssh_init_stdio_forwarding(); ssh_init_forwarding(); /* Start listening for multiplex clients */ muxserver_listen(); /* - * If we are in control persist mode, then prepare to background - * ourselves and have a foreground client attach as a control - * slave. NB. we must save copies of the flags that we override for + * If we are in control persist mode and have a working mux listen + * socket, then prepare to background ourselves and have a foreground + * client attach as a control slave. + * NB. we must save copies of the flags that we override for * the backgrounding, since we defer attachment of the slave until * after the connection is fully established (in particular, * async rfwd replies have been received for ExitOnForwardFailure). @@ -1603,9 +2053,20 @@ ssh_session2(void) need_controlpersist_detach = 1; fork_after_authentication_flag = 1; } + /* + * ControlPersist mux listen socket setup failed, attempt the + * stdio forward setup that we skipped earlier. + */ + if (options.control_persist && muxserver_sock == -1) + ssh_init_stdio_forwarding(); if (!no_shell_flag || (datafellows & SSH_BUG_DUMMYCHAN)) id = ssh_session2_open(); + else { + packet_set_interactive( + options.control_master == SSHCTL_MASTER_NO, + options.ip_qos_interactive, options.ip_qos_bulk); + } /* If we don't expect to open a new session, then disallow it */ if (options.control_master == SSHCTL_MASTER_NO && @@ -1659,8 +2120,8 @@ load_public_identity_files(void) #endif /* PKCS11 */ n_ids = 0; - bzero(identity_files, sizeof(identity_files)); - bzero(identity_keys, sizeof(identity_keys)); + memset(identity_files, 0, sizeof(identity_files)); + memset(identity_keys, 0, sizeof(identity_keys)); #ifdef ENABLE_PKCS11 if (options.pkcs11_provider != NULL && @@ -1678,7 +2139,7 @@ load_public_identity_files(void) xstrdup(options.pkcs11_provider); /* XXX */ n_ids++; } - xfree(keys); + free(keys); } #endif /* ENABLE_PKCS11 */ if ((pw = getpwuid(original_real_uid)) == NULL) @@ -1698,8 +2159,9 @@ load_public_identity_files(void) fatal("load_public_identity_files: gethostname: %s", strerror(errno)); for (i = 0; i < options.num_identity_files; i++) { - if (n_ids >= SSH_MAX_IDENTITY_FILES) { - xfree(options.identity_files[i]); + if (n_ids >= SSH_MAX_IDENTITY_FILES || + strcasecmp(options.identity_files[i], "none") == 0) { + free(options.identity_files[i]); continue; } cp = tilde_expand_filename(options.identity_files[i], @@ -1707,11 +2169,11 @@ load_public_identity_files(void) filename = percent_expand(cp, "d", pwdir, "u", pwname, "l", thishost, "h", host, "r", options.user, (char *)NULL); - xfree(cp); + free(cp); public = key_load_public(filename, NULL); debug("identity file %s type %d", filename, public ? public->type : -1); - xfree(options.identity_files[i]); + free(options.identity_files[i]); identity_files[n_ids] = filename; identity_keys[n_ids] = public; @@ -1724,14 +2186,14 @@ load_public_identity_files(void) debug("identity file %s type %d", cp, public ? public->type : -1); if (public == NULL) { - xfree(cp); + free(cp); continue; } if (!key_is_cert(public)) { debug("%s: key %s type %s is not a certificate", __func__, cp, key_type(public)); key_free(public); - xfree(cp); + free(cp); continue; } identity_keys[n_ids] = public; @@ -1743,12 +2205,11 @@ load_public_identity_files(void) memcpy(options.identity_files, identity_files, sizeof(identity_files)); memcpy(options.identity_keys, identity_keys, sizeof(identity_keys)); - bzero(pwname, strlen(pwname)); - xfree(pwname); - bzero(pwdir, strlen(pwdir)); - xfree(pwdir); + explicit_bzero(pwname, strlen(pwname)); + free(pwname); + explicit_bzero(pwdir, strlen(pwdir)); + free(pwdir); } - #ifdef SIGCHLD static void main_sigchld_handler(int sig) diff --git a/ssh.h b/ssh.h index c94633b..39c7e18 100644 --- a/ssh.h +++ b/ssh.h @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh.h,v 1.79 2010/06/25 07:14:46 djm Exp $ */ +/* $OpenBSD: ssh.h,v 1.81 2015/08/04 05:23:06 djm Exp $ */ /* * Author: Tatu Ylonen diff --git a/ssh_api.c b/ssh_api.c new file mode 100644 index 0000000..6c71258 --- /dev/null +++ b/ssh_api.c @@ -0,0 +1,537 @@ +/* $OpenBSD: ssh_api.c,v 1.4 2015/02/16 22:13:32 djm Exp $ */ +/* + * Copyright (c) 2012 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include "ssh1.h" /* For SSH_MSG_NONE */ +#include "ssh_api.h" +#include "compat.h" +#include "log.h" +#include "authfile.h" +#include "sshkey.h" +#include "misc.h" +#include "ssh1.h" +#include "ssh2.h" +#include "version.h" +#include "myproposal.h" +#include "ssherr.h" +#include "sshbuf.h" + +#include + +int _ssh_exchange_banner(struct ssh *); +int _ssh_send_banner(struct ssh *, char **); +int _ssh_read_banner(struct ssh *, char **); +int _ssh_order_hostkeyalgs(struct ssh *); +int _ssh_verify_host_key(struct sshkey *, struct ssh *); +struct sshkey *_ssh_host_public_key(int, int, struct ssh *); +struct sshkey *_ssh_host_private_key(int, int, struct ssh *); +int _ssh_host_key_sign(struct sshkey *, struct sshkey *, u_char **, + size_t *, const u_char *, size_t, u_int); + +/* + * stubs for the server side implementation of kex. + * disable privsep so our stubs will never be called. + */ +int use_privsep = 0; +int mm_sshkey_sign(struct sshkey *, u_char **, u_int *, + u_char *, u_int, u_int); +DH *mm_choose_dh(int, int, int); + +/* Define these two variables here so that they are part of the library */ +u_char *session_id2 = NULL; +u_int session_id2_len = 0; + +int +mm_sshkey_sign(struct sshkey *key, u_char **sigp, u_int *lenp, + u_char *data, u_int datalen, u_int compat) +{ + return (-1); +} + +DH * +mm_choose_dh(int min, int nbits, int max) +{ + return (NULL); +} + +/* API */ + +int +ssh_init(struct ssh **sshp, int is_server, struct kex_params *kex_params) +{ + char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; + struct ssh *ssh; + char **proposal; + static int called; + int r; + + if (!called) { +#ifdef WITH_OPENSSL + OpenSSL_add_all_algorithms(); +#endif /* WITH_OPENSSL */ + called = 1; + } + + if ((ssh = ssh_packet_set_connection(NULL, -1, -1)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (is_server) + ssh_packet_set_server(ssh); + + /* Initialize key exchange */ + proposal = kex_params ? kex_params->proposal : myproposal; + if ((r = kex_new(ssh, proposal, &ssh->kex)) != 0) { + ssh_free(ssh); + return r; + } + ssh->kex->server = is_server; + if (is_server) { +#ifdef WITH_OPENSSL + ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; + ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; + ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; + ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; +# ifdef OPENSSL_HAS_ECC + ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_server; +# endif +#endif /* WITH_OPENSSL */ + ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_server; + ssh->kex->load_host_public_key=&_ssh_host_public_key; + ssh->kex->load_host_private_key=&_ssh_host_private_key; + ssh->kex->sign=&_ssh_host_key_sign; + } else { +#ifdef WITH_OPENSSL + ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; + ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; + ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; + ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; +# ifdef OPENSSL_HAS_ECC + ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_client; +# endif +#endif /* WITH_OPENSSL */ + ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_client; + ssh->kex->verify_host_key =&_ssh_verify_host_key; + } + *sshp = ssh; + return 0; +} + +void +ssh_free(struct ssh *ssh) +{ + struct key_entry *k; + + ssh_packet_close(ssh); + /* + * we've only created the public keys variants in case we + * are a acting as a server. + */ + while ((k = TAILQ_FIRST(&ssh->public_keys)) != NULL) { + TAILQ_REMOVE(&ssh->public_keys, k, next); + if (ssh->kex && ssh->kex->server) + sshkey_free(k->key); + free(k); + } + while ((k = TAILQ_FIRST(&ssh->private_keys)) != NULL) { + TAILQ_REMOVE(&ssh->private_keys, k, next); + free(k); + } + if (ssh->kex) + kex_free(ssh->kex); + free(ssh); +} + +void +ssh_set_app_data(struct ssh *ssh, void *app_data) +{ + ssh->app_data = app_data; +} + +void * +ssh_get_app_data(struct ssh *ssh) +{ + return ssh->app_data; +} + +/* Returns < 0 on error, 0 otherwise */ +int +ssh_add_hostkey(struct ssh *ssh, struct sshkey *key) +{ + struct sshkey *pubkey = NULL; + struct key_entry *k = NULL, *k_prv = NULL; + int r; + + if (ssh->kex->server) { + if ((r = sshkey_from_private(key, &pubkey)) != 0) + return r; + if ((k = malloc(sizeof(*k))) == NULL || + (k_prv = malloc(sizeof(*k_prv))) == NULL) { + free(k); + sshkey_free(pubkey); + return SSH_ERR_ALLOC_FAIL; + } + k_prv->key = key; + TAILQ_INSERT_TAIL(&ssh->private_keys, k_prv, next); + + /* add the public key, too */ + k->key = pubkey; + TAILQ_INSERT_TAIL(&ssh->public_keys, k, next); + r = 0; + } else { + if ((k = malloc(sizeof(*k))) == NULL) + return SSH_ERR_ALLOC_FAIL; + k->key = key; + TAILQ_INSERT_TAIL(&ssh->public_keys, k, next); + r = 0; + } + + return r; +} + +int +ssh_set_verify_host_key_callback(struct ssh *ssh, + int (*cb)(struct sshkey *, struct ssh *)) +{ + if (cb == NULL || ssh->kex == NULL) + return SSH_ERR_INVALID_ARGUMENT; + + ssh->kex->verify_host_key = cb; + + return 0; +} + +int +ssh_input_append(struct ssh *ssh, const u_char *data, size_t len) +{ + return sshbuf_put(ssh_packet_get_input(ssh), data, len); +} + +int +ssh_packet_next(struct ssh *ssh, u_char *typep) +{ + int r; + u_int32_t seqnr; + u_char type; + + /* + * Try to read a packet. Return SSH_MSG_NONE if no packet or not + * enough data. + */ + *typep = SSH_MSG_NONE; + if (ssh->kex->client_version_string == NULL || + ssh->kex->server_version_string == NULL) + return _ssh_exchange_banner(ssh); + /* + * If we enough data and a dispatch function then + * call the function and get the next packet. + * Otherwise return the packet type to the caller so it + * can decide how to go on. + * + * We will only call the dispatch function for: + * 20-29 Algorithm negotiation + * 30-49 Key exchange method specific (numbers can be reused for + * different authentication methods) + */ + for (;;) { + if ((r = ssh_packet_read_poll2(ssh, &type, &seqnr)) != 0) + return r; + if (type > 0 && type < DISPATCH_MAX && + type >= SSH2_MSG_KEXINIT && type <= SSH2_MSG_TRANSPORT_MAX && + ssh->dispatch[type] != NULL) { + if ((r = (*ssh->dispatch[type])(type, seqnr, ssh)) != 0) + return r; + } else { + *typep = type; + return 0; + } + } +} + +const u_char * +ssh_packet_payload(struct ssh *ssh, size_t *lenp) +{ + return sshpkt_ptr(ssh, lenp); +} + +int +ssh_packet_put(struct ssh *ssh, int type, const u_char *data, size_t len) +{ + int r; + + if ((r = sshpkt_start(ssh, type)) != 0 || + (r = sshpkt_put(ssh, data, len)) != 0 || + (r = sshpkt_send(ssh)) != 0) + return r; + return 0; +} + +const u_char * +ssh_output_ptr(struct ssh *ssh, size_t *len) +{ + struct sshbuf *output = ssh_packet_get_output(ssh); + + *len = sshbuf_len(output); + return sshbuf_ptr(output); +} + +int +ssh_output_consume(struct ssh *ssh, size_t len) +{ + return sshbuf_consume(ssh_packet_get_output(ssh), len); +} + +int +ssh_output_space(struct ssh *ssh, size_t len) +{ + return (0 == sshbuf_check_reserve(ssh_packet_get_output(ssh), len)); +} + +int +ssh_input_space(struct ssh *ssh, size_t len) +{ + return (0 == sshbuf_check_reserve(ssh_packet_get_input(ssh), len)); +} + +/* Read other side's version identification. */ +int +_ssh_read_banner(struct ssh *ssh, char **bannerp) +{ + struct sshbuf *input; + const char *s; + char buf[256], remote_version[256]; /* must be same size! */ + const char *mismatch = "Protocol mismatch.\r\n"; + int r, remote_major, remote_minor; + size_t i, n, j, len; + + *bannerp = NULL; + input = ssh_packet_get_input(ssh); + len = sshbuf_len(input); + s = (const char *)sshbuf_ptr(input); + for (j = n = 0;;) { + for (i = 0; i < sizeof(buf) - 1; i++) { + if (j >= len) + return (0); + buf[i] = s[j++]; + if (buf[i] == '\r') { + buf[i] = '\n'; + buf[i + 1] = 0; + continue; /**XXX wait for \n */ + } + if (buf[i] == '\n') { + buf[i + 1] = 0; + break; + } + } + buf[sizeof(buf) - 1] = 0; + if (strncmp(buf, "SSH-", 4) == 0) + break; + debug("ssh_exchange_identification: %s", buf); + if (ssh->kex->server || ++n > 65536) { + if ((r = sshbuf_put(ssh_packet_get_output(ssh), + mismatch, strlen(mismatch))) != 0) + return r; + return SSH_ERR_NO_PROTOCOL_VERSION; + } + } + if ((r = sshbuf_consume(input, j)) != 0) + return r; + + /* + * Check that the versions match. In future this might accept + * several versions and set appropriate flags to handle them. + */ + if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", + &remote_major, &remote_minor, remote_version) != 3) + return SSH_ERR_INVALID_FORMAT; + debug("Remote protocol version %d.%d, remote software version %.100s", + remote_major, remote_minor, remote_version); + + ssh->compat = compat_datafellows(remote_version); + if (remote_major == 1 && remote_minor == 99) { + remote_major = 2; + remote_minor = 0; + } + if (remote_major != 2) + return SSH_ERR_PROTOCOL_MISMATCH; + enable_compat20(); + chop(buf); + debug("Remote version string %.100s", buf); + if ((*bannerp = strdup(buf)) == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; +} + +/* Send our own protocol version identification. */ +int +_ssh_send_banner(struct ssh *ssh, char **bannerp) +{ + char buf[256]; + int r; + + snprintf(buf, sizeof buf, "SSH-2.0-%.100s\r\n", SSH_VERSION); + if ((r = sshbuf_put(ssh_packet_get_output(ssh), buf, strlen(buf))) != 0) + return r; + chop(buf); + debug("Local version string %.100s", buf); + if ((*bannerp = strdup(buf)) == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; +} + +int +_ssh_exchange_banner(struct ssh *ssh) +{ + struct kex *kex = ssh->kex; + int r; + + /* + * if _ssh_read_banner() cannot parse a full version string + * it will return NULL and we end up calling it again. + */ + + r = 0; + if (kex->server) { + if (kex->server_version_string == NULL) + r = _ssh_send_banner(ssh, &kex->server_version_string); + if (r == 0 && + kex->server_version_string != NULL && + kex->client_version_string == NULL) + r = _ssh_read_banner(ssh, &kex->client_version_string); + } else { + if (kex->server_version_string == NULL) + r = _ssh_read_banner(ssh, &kex->server_version_string); + if (r == 0 && + kex->server_version_string != NULL && + kex->client_version_string == NULL) + r = _ssh_send_banner(ssh, &kex->client_version_string); + } + if (r != 0) + return r; + /* start initial kex as soon as we have exchanged the banners */ + if (kex->server_version_string != NULL && + kex->client_version_string != NULL) { + if ((r = _ssh_order_hostkeyalgs(ssh)) != 0 || + (r = kex_send_kexinit(ssh)) != 0) + return r; + } + return 0; +} + +struct sshkey * +_ssh_host_public_key(int type, int nid, struct ssh *ssh) +{ + struct key_entry *k; + + debug3("%s: need %d", __func__, type); + TAILQ_FOREACH(k, &ssh->public_keys, next) { + debug3("%s: check %s", __func__, sshkey_type(k->key)); + if (k->key->type == type && + (type != KEY_ECDSA || k->key->ecdsa_nid == nid)) + return (k->key); + } + return (NULL); +} + +struct sshkey * +_ssh_host_private_key(int type, int nid, struct ssh *ssh) +{ + struct key_entry *k; + + debug3("%s: need %d", __func__, type); + TAILQ_FOREACH(k, &ssh->private_keys, next) { + debug3("%s: check %s", __func__, sshkey_type(k->key)); + if (k->key->type == type && + (type != KEY_ECDSA || k->key->ecdsa_nid == nid)) + return (k->key); + } + return (NULL); +} + +int +_ssh_verify_host_key(struct sshkey *hostkey, struct ssh *ssh) +{ + struct key_entry *k; + + debug3("%s: need %s", __func__, sshkey_type(hostkey)); + TAILQ_FOREACH(k, &ssh->public_keys, next) { + debug3("%s: check %s", __func__, sshkey_type(k->key)); + if (sshkey_equal_public(hostkey, k->key)) + return (0); /* ok */ + } + return (-1); /* failed */ +} + +/* offer hostkey algorithms in kexinit depending on registered keys */ +int +_ssh_order_hostkeyalgs(struct ssh *ssh) +{ + struct key_entry *k; + char *orig, *avail, *oavail = NULL, *alg, *replace = NULL; + char **proposal; + size_t maxlen; + int ktype, r; + + /* XXX we de-serialize ssh->kex->my, modify it, and change it */ + if ((r = kex_buf2prop(ssh->kex->my, NULL, &proposal)) != 0) + return r; + orig = proposal[PROPOSAL_SERVER_HOST_KEY_ALGS]; + if ((oavail = avail = strdup(orig)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + maxlen = strlen(avail) + 1; + if ((replace = calloc(1, maxlen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + *replace = '\0'; + while ((alg = strsep(&avail, ",")) && *alg != '\0') { + if ((ktype = sshkey_type_from_name(alg)) == KEY_UNSPEC) + continue; + TAILQ_FOREACH(k, &ssh->public_keys, next) { + if (k->key->type == ktype || + (sshkey_is_cert(k->key) && k->key->type == + sshkey_type_plain(ktype))) { + if (*replace != '\0') + strlcat(replace, ",", maxlen); + strlcat(replace, alg, maxlen); + break; + } + } + } + if (*replace != '\0') { + debug2("%s: orig/%d %s", __func__, ssh->kex->server, orig); + debug2("%s: replace/%d %s", __func__, ssh->kex->server, replace); + free(orig); + proposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = replace; + replace = NULL; /* owned by proposal */ + r = kex_prop2buf(ssh->kex->my, proposal); + } + out: + free(oavail); + free(replace); + kex_prop_free(proposal); + return r; +} + +int +_ssh_host_key_sign(struct sshkey *privkey, struct sshkey *pubkey, + u_char **signature, size_t *slen, + const u_char *data, size_t dlen, u_int compat) +{ + return sshkey_sign(privkey, signature, slen, data, dlen, compat); +} diff --git a/ssh_api.h b/ssh_api.h new file mode 100644 index 0000000..642acd5 --- /dev/null +++ b/ssh_api.h @@ -0,0 +1,137 @@ +/* $OpenBSD: ssh_api.h,v 1.1 2015/01/19 20:30:23 markus Exp $ */ +/* + * Copyright (c) 2012 Markus Friedl. All rights reserved. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef API_H +#define API_H + +#include +#include + +#include "openbsd-compat/sys-queue.h" + +#include "cipher.h" +#include "sshkey.h" +#include "kex.h" +#include "ssh.h" +#include "ssh2.h" +#include "packet.h" + +struct kex_params { + char *proposal[PROPOSAL_MAX]; +}; + +/* public SSH API functions */ + +/* + * ssh_init() create a ssh connection object with given (optional) + * key exchange parameters. + */ +int ssh_init(struct ssh **, int is_server, struct kex_params *kex_params); + +/* + * release ssh connection state. + */ +void ssh_free(struct ssh *); + +/* + * attach application specific data to the connection state + */ +void ssh_set_app_data(struct ssh *, void *); +void *ssh_get_app_data(struct ssh *); + +/* + * ssh_add_hostkey() registers a private/public hostkey for an ssh + * connection. + * ssh_add_hostkey() needs to be called before a key exchange is + * initiated with ssh_packet_next(). + * private hostkeys are required if we need to act as a server. + * public hostkeys are used to verify the servers hostkey. + */ +int ssh_add_hostkey(struct ssh *ssh, struct sshkey *key); + +/* + * ssh_set_verify_host_key_callback() registers a callback function + * which should be called instead of the default verification. The + * function given must return 0 if the hostkey is ok, -1 if the + * verification has failed. + */ +int ssh_set_verify_host_key_callback(struct ssh *ssh, + int (*cb)(struct sshkey *, struct ssh *)); + +/* + * ssh_packet_next() advances to the next input packet and returns + * the packet type in typep. + * ssh_packet_next() works by processing an input byte-stream, + * decrypting the received data and hiding the key-exchange from + * the caller. + * ssh_packet_next() sets typep if there is no new packet available. + * in this case the caller must fill the input byte-stream by passing + * the data received over network to ssh_input_append(). + * additinally, the caller needs to send the resulting output + * byte-stream back over the network. otherwise the key exchange + * would not proceed. the output byte-stream is accessed through + * ssh_output_ptr(). + */ +int ssh_packet_next(struct ssh *ssh, u_char *typep); + +/* + * ssh_packet_payload() returns a pointer to the raw payload data of + * the current input packet and the length of this payload. + * the payload is accessible until ssh_packet_next() is called again. + */ +const u_char *ssh_packet_payload(struct ssh *ssh, size_t *lenp); + +/* + * ssh_packet_put() creates an encrypted packet with the given type + * and payload. + * the encrypted packet is appended to the output byte-stream. + */ +int ssh_packet_put(struct ssh *ssh, int type, const u_char *data, + size_t len); + +/* + * ssh_input_space() checks if 'len' bytes can be appended to the + * input byte-stream. + */ +int ssh_input_space(struct ssh *ssh, size_t len); + +/* + * ssh_input_append() appends data to the input byte-stream. + */ +int ssh_input_append(struct ssh *ssh, const u_char *data, size_t len); + +/* + * ssh_output_space() checks if 'len' bytes can be appended to the + * output byte-stream. XXX + */ +int ssh_output_space(struct ssh *ssh, size_t len); + +/* + * ssh_output_ptr() retrieves both a pointer and the length of the + * current output byte-stream. the bytes need to be sent over the + * network. the number of bytes that have been successfully sent can + * be removed from the output byte-stream with ssh_output_consume(). + */ +const u_char *ssh_output_ptr(struct ssh *ssh, size_t *len); + +/* + * ssh_output_consume() removes the given number of bytes from + * the output byte-stream. + */ +int ssh_output_consume(struct ssh *ssh, size_t len); + +#endif diff --git a/ssh_config b/ssh_config index 1893674..4bfc008 100644 --- a/ssh_config +++ b/ssh_config @@ -45,3 +45,4 @@ # PermitLocalCommand no # VisualHostKey no # ProxyCommand ssh -q -W %h:%p gateway.example.com +#UsePrivilegeSeparation no diff --git a/ssh_host_dsa_key b/ssh_host_dsa_key new file mode 100644 index 0000000..bd2140b --- /dev/null +++ b/ssh_host_dsa_key @@ -0,0 +1,12 @@ +-----BEGIN DSA PRIVATE KEY----- +MIIBvAIBAAKBgQC6S1DTs1okCcExu9s0TzZ1I9O2SJIBKFImynjNqZcwohAiO40n +GSLEUR3A/lhE87zLSXRGdcGGgwL9EZ7J99G+0w0JPiec4/6VhrExZ+sLf0Wucepv +r/iVblp3j61EVjJXAAiCk2tLC8BywAMlAJfnTcYaho0aHlNm1slk3kDBTwIVAMi1 +PXi8QETGZ044NO7EpNE2+C0NAoGBAKnvjaX/u8Gr+LUP+nz73Owbr43X44D01ZbG +Dy66ahBQxXO9I+lu8MCazcMZhhxdsEaEY0qBd2WNVLaI2aiIszVQ2nhgIRtjbiyC +gvJZjVqfVQntbLzFSvL6C2KXzdWHu/0zszpOq+4CBXOioZ0R+/nt4p+9IjWOg0XJ +DeeLAkpKAoGBAJVMlVzMtmEMmk4QN64FJ6l3DxGSbNBM+FeflgUneTu0l8FxQfR0 +ELl+lW39JzeqFoCHwTbDlifw5tNJOQZO+lDKj+gCNopuXPA9ZuPJKWFxmRxt9Bpk +B04V+ldSN2TnrlBSEmaDrmw7mCj+8gXYg3leSTWPYhzrIeTNgtyk9TzIAhQlwADD +GP+ZNisGS0TgHf0GVxvQSw== +-----END DSA PRIVATE KEY----- diff --git a/ssh_host_dsa_key.pub b/ssh_host_dsa_key.pub new file mode 100644 index 0000000..9ef638e --- /dev/null +++ b/ssh_host_dsa_key.pub @@ -0,0 +1 @@ +ssh-dss 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 @oasis diff --git a/ssh_host_ecdsa_key b/ssh_host_ecdsa_key new file mode 100644 index 0000000..ed84c9f --- /dev/null +++ b/ssh_host_ecdsa_key @@ -0,0 +1,5 @@ +-----BEGIN EC PRIVATE KEY----- +MHcCAQEEIOrwk5LCELxzRGufJcI3ogOmaqYwNGYg0KIZqnQysKsPoAoGCCqGSM49 +AwEHoUQDQgAEXkGf9akhGRCleBfum8S5D11uWdOngABaPtFj7OHGk4u8gncSGf3g +uQj9j5MSCt9BV57GXKXgb0Xu0TH0wXbNqA== +-----END EC PRIVATE KEY----- diff --git a/ssh_host_ecdsa_key.pub b/ssh_host_ecdsa_key.pub new file mode 100644 index 0000000..176b105 --- /dev/null +++ b/ssh_host_ecdsa_key.pub @@ -0,0 +1 @@ +ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBF5Bn/WpIRkQpXgX7pvEuQ9dblnTp4AAWj7RY+zhxpOLvIJ3Ehn94LkI/Y+TEgrfQVeexlyl4G9F7tEx9MF2zag= @oasis diff --git a/ssh_host_ed25519_key b/ssh_host_ed25519_key new file mode 100644 index 0000000..281890d --- /dev/null +++ b/ssh_host_ed25519_key @@ -0,0 +1,7 @@ +-----BEGIN OPENSSH PRIVATE KEY----- +b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW +QyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyAAAAJAJSj5MCUo+ +TAAAAAtzc2gtZWQyNTUxOQAAACDsm6kHU3O2x/KuzcbAUhZGYsoc4Gn6YiFcuulsx4gsyA +AAAECGe69spV/5acdoNqiARzB79o5ASCy2SQ6Ng7SWENmDguybqQdTc7bH8q7NxsBSFkZi +yhzgafpiIVy66WzHiCzIAAAABkBvYXNpcwECAwQFBgc= +-----END OPENSSH PRIVATE KEY----- diff --git a/ssh_host_ed25519_key.pub b/ssh_host_ed25519_key.pub new file mode 100644 index 0000000..a7c1e5e --- /dev/null +++ b/ssh_host_ed25519_key.pub @@ -0,0 +1 @@ +ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOybqQdTc7bH8q7NxsBSFkZiyhzgafpiIVy66WzHiCzI @oasis diff --git a/ssh_host_rsa_key b/ssh_host_rsa_key new file mode 100644 index 0000000..99adfb8 --- /dev/null +++ b/ssh_host_rsa_key @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpAIBAAKCAQEArlGMB9Z1b5AdNfsQTg2IsemKin/UsDLKVwJ5GFFYRXTLlDm9 +LkGQqn7VCwdwR1Ff7oTJu16kpRIIXjEpMh9Mhcc2LfPiv2po4oXeEx6sreYM3TDv +votqlKUrrjKuK1vxbabl6zgrOpJ9v1ssEREYG/D1Xquejj8p5VVnPTCh24JVDRhX +PGU2O8CKI29T86N60ziyt4Y0Op61BKDbivgiXpNn+mM0y2R6eLpXuplb8Beh7wUS +Whjz2TNqPk3lYYSfLGEDK3Owwxj12hVjBlY3VqZLFZ0Y6FMPohf5rDg9lpAInCg9 +qRc8K0/iaMkEhCGd/9arIVjTHHQT0OtutfGSKwIDAQABAoIBAQCYBWH7i9oKm0H+ +S5+ikkb98U/zDRwtNX4kd3Gn9Xjnyb2o3NnRNzi0l7uvzKLsb1kcKA3OK/GmS52k +l3b30TfpCxyC4siCaohh1KEhR4UMey4I0J6kK+2dCJaZanVeNubL29tzUR7SC+NC +OH6ru56s72ztTPoPz6H38I0CXiEpzoReKP9+2r1DPHhDeY0J1T4ebLYiWEvd4uLx +7i6nKyCzmjOWuVSIG5uQzBvqk59ycPrVK/EpKCGlJDLgnVrTcQAb9VexOYKfxcDi +grbl3RO1aucd5HvvPpu0r802j82ccnwj/WbNLNG+UCCISDNXxeBPgo/rdfdgJLQc +R74/9+7RAoGBAOPbZZzHXWvWMdtZr9RRtMX3Ovz2Z+NRP/eKYz8vv9HUp4JpkA76 +UDVFofk1vHjAOrbUDL5977i4Grv23ZRxcDV+yKlpiwo2N4PTON/n5rk+VmTt6OLs +cL8bbLrNCutThyA5ZrDSyh6/c0lewlEvikssH8KZeoZuK6eWRk4HxPwHAoGBAMPZ +UaGibgfXav7Nrnm/7rBT9M2PiFYGpGw0XsWIB7d3P5jqLeOiuoKUaP/PLHISIOx5 +rFeZgYCDo0z61e6gWiDA7fLDCoW9TF5BN5x+ulc2xHYg6lZg0HKSEOeAFKP8o/IT +k3u3HockPbXfuyFfrQwDx9L1i3V1USfrAb6iMje9AoGAYoVt1TE6yrLN0etgpGxD +vslcfx5H4zkxcGYs7ZhG14Kcfz4HpQJEhhQ6qde7S3bKrFzZudAYRAWOwbFHM7Us +8GSGfQH+tYal0GEXGXFbCMPUdUWNSfkz8t330Hlx/Dicl6laJqCt9kePoKzRVms4 +37IPdYQJP3EJfSfz9C9V1CcCgYEAtfGqmJKhzb8es2C5enoIcN9OSbnSWrkI/00X +zkK1iIfMGW9U+mkvBCiD80Kwc7jLxWSz6x285XtlthpBrNJjaJJTfHgdymk2DUph +M42351YF5ghmK6D9hbKU6bxfcIlAdaAiH4jbX4kXm2MiIbsUtFi+xwk+afx3TLJS +iJt+M7ECgYAG7rcLKuooI6mOpPVtqugFGBWKxrh2GC9Hj22H3uHW9UcIfU5TO763 +i/mcS5VrXIGUZn1qw+FE7vnwG5ypBbV03R9CON+LXVnuT7r0jff2yhMJ7n3ieXc5 +otjABjFJr9wX2mQ2kn5ugs57rPpOHbQldRqfawBXklHwY7swXm2OAg== +-----END RSA PRIVATE KEY----- diff --git a/ssh_host_rsa_key.pub b/ssh_host_rsa_key.pub new file mode 100644 index 0000000..7169c3c --- /dev/null +++ b/ssh_host_rsa_key.pub @@ -0,0 +1 @@ +ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGVZzgrkEiQwiqb3F7bu39dayPGJqdCg1xLhS4S7nrFfcCFqHmuOqzp4wwxUacYaCOXitTJK0pmfgfT2O67xSRDWemTQhadN29E9BfYMWtkNgbA4sfYJUXIcVZtLJNqoNTmPC5mvbJJub6E3wm8800aiVCyZIVdTsumLnOlPXvguE0rKN62g39PiDzVHwexkoxbtbs52wh2IodDkN4Fma+r9YTlm3FMipo/3HDo75G/SQNeOA9TKhS1MEQ4kQ1eTW+UzMMFuQyNzt8q6OcyaGYhxN6zgmFiW8Hp/yQJDcw/QDhoPVdXAONnLsNE89s63e85nPdm70pyswOadEdlIeX @oasis diff --git a/sshbuf-getput-basic.c b/sshbuf-getput-basic.c new file mode 100644 index 0000000..8ff8a0a --- /dev/null +++ b/sshbuf-getput-basic.c @@ -0,0 +1,462 @@ +/* $OpenBSD: sshbuf-getput-basic.c,v 1.4 2015/01/14 15:02:39 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#define SSHBUF_INTERNAL +#include "includes.h" + +#include +#include +#include +#include + +#include "ssherr.h" +#include "sshbuf.h" + +int +sshbuf_get(struct sshbuf *buf, void *v, size_t len) +{ + const u_char *p = sshbuf_ptr(buf); + int r; + + if ((r = sshbuf_consume(buf, len)) < 0) + return r; + if (v != NULL && len != 0) + memcpy(v, p, len); + return 0; +} + +int +sshbuf_get_u64(struct sshbuf *buf, u_int64_t *valp) +{ + const u_char *p = sshbuf_ptr(buf); + int r; + + if ((r = sshbuf_consume(buf, 8)) < 0) + return r; + if (valp != NULL) + *valp = PEEK_U64(p); + return 0; +} + +int +sshbuf_get_u32(struct sshbuf *buf, u_int32_t *valp) +{ + const u_char *p = sshbuf_ptr(buf); + int r; + + if ((r = sshbuf_consume(buf, 4)) < 0) + return r; + if (valp != NULL) + *valp = PEEK_U32(p); + return 0; +} + +int +sshbuf_get_u16(struct sshbuf *buf, u_int16_t *valp) +{ + const u_char *p = sshbuf_ptr(buf); + int r; + + if ((r = sshbuf_consume(buf, 2)) < 0) + return r; + if (valp != NULL) + *valp = PEEK_U16(p); + return 0; +} + +int +sshbuf_get_u8(struct sshbuf *buf, u_char *valp) +{ + const u_char *p = sshbuf_ptr(buf); + int r; + + if ((r = sshbuf_consume(buf, 1)) < 0) + return r; + if (valp != NULL) + *valp = (u_int8_t)*p; + return 0; +} + +int +sshbuf_get_string(struct sshbuf *buf, u_char **valp, size_t *lenp) +{ + const u_char *val; + size_t len; + int r; + + if (valp != NULL) + *valp = NULL; + if (lenp != NULL) + *lenp = 0; + if ((r = sshbuf_get_string_direct(buf, &val, &len)) < 0) + return r; + if (valp != NULL) { + if ((*valp = malloc(len + 1)) == NULL) { + SSHBUF_DBG(("SSH_ERR_ALLOC_FAIL")); + return SSH_ERR_ALLOC_FAIL; + } + if (len != 0) + memcpy(*valp, val, len); + (*valp)[len] = '\0'; + } + if (lenp != NULL) + *lenp = len; + return 0; +} + +int +sshbuf_get_string_direct(struct sshbuf *buf, const u_char **valp, size_t *lenp) +{ + size_t len; + const u_char *p; + int r; + + if (valp != NULL) + *valp = NULL; + if (lenp != NULL) + *lenp = 0; + if ((r = sshbuf_peek_string_direct(buf, &p, &len)) < 0) + return r; + if (valp != 0) + *valp = p; + if (lenp != NULL) + *lenp = len; + if (sshbuf_consume(buf, len + 4) != 0) { + /* Shouldn't happen */ + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + SSHBUF_ABORT(); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +int +sshbuf_peek_string_direct(const struct sshbuf *buf, const u_char **valp, + size_t *lenp) +{ + u_int32_t len; + const u_char *p = sshbuf_ptr(buf); + + if (valp != NULL) + *valp = NULL; + if (lenp != NULL) + *lenp = 0; + if (sshbuf_len(buf) < 4) { + SSHBUF_DBG(("SSH_ERR_MESSAGE_INCOMPLETE")); + return SSH_ERR_MESSAGE_INCOMPLETE; + } + len = PEEK_U32(p); + if (len > SSHBUF_SIZE_MAX - 4) { + SSHBUF_DBG(("SSH_ERR_STRING_TOO_LARGE")); + return SSH_ERR_STRING_TOO_LARGE; + } + if (sshbuf_len(buf) - 4 < len) { + SSHBUF_DBG(("SSH_ERR_MESSAGE_INCOMPLETE")); + return SSH_ERR_MESSAGE_INCOMPLETE; + } + if (valp != 0) + *valp = p + 4; + if (lenp != NULL) + *lenp = len; + return 0; +} + +int +sshbuf_get_cstring(struct sshbuf *buf, char **valp, size_t *lenp) +{ + size_t len; + const u_char *p, *z; + int r; + + if (valp != NULL) + *valp = NULL; + if (lenp != NULL) + *lenp = 0; + if ((r = sshbuf_peek_string_direct(buf, &p, &len)) != 0) + return r; + /* Allow a \0 only at the end of the string */ + if (len > 0 && + (z = memchr(p , '\0', len)) != NULL && z < p + len - 1) { + SSHBUF_DBG(("SSH_ERR_INVALID_FORMAT")); + return SSH_ERR_INVALID_FORMAT; + } + if ((r = sshbuf_skip_string(buf)) != 0) + return -1; + if (valp != NULL) { + if ((*valp = malloc(len + 1)) == NULL) { + SSHBUF_DBG(("SSH_ERR_ALLOC_FAIL")); + return SSH_ERR_ALLOC_FAIL; + } + if (len != 0) + memcpy(*valp, p, len); + (*valp)[len] = '\0'; + } + if (lenp != NULL) + *lenp = (size_t)len; + return 0; +} + +int +sshbuf_get_stringb(struct sshbuf *buf, struct sshbuf *v) +{ + u_int32_t len; + u_char *p; + int r; + + /* + * Use sshbuf_peek_string_direct() to figure out if there is + * a complete string in 'buf' and copy the string directly + * into 'v'. + */ + if ((r = sshbuf_peek_string_direct(buf, NULL, NULL)) != 0 || + (r = sshbuf_get_u32(buf, &len)) != 0 || + (r = sshbuf_reserve(v, len, &p)) != 0 || + (r = sshbuf_get(buf, p, len)) != 0) + return r; + return 0; +} + +int +sshbuf_put(struct sshbuf *buf, const void *v, size_t len) +{ + u_char *p; + int r; + + if ((r = sshbuf_reserve(buf, len, &p)) < 0) + return r; + if (len != 0) + memcpy(p, v, len); + return 0; +} + +int +sshbuf_putb(struct sshbuf *buf, const struct sshbuf *v) +{ + return sshbuf_put(buf, sshbuf_ptr(v), sshbuf_len(v)); +} + +int +sshbuf_putf(struct sshbuf *buf, const char *fmt, ...) +{ + va_list ap; + int r; + + va_start(ap, fmt); + r = sshbuf_putfv(buf, fmt, ap); + va_end(ap); + return r; +} + +int +sshbuf_putfv(struct sshbuf *buf, const char *fmt, va_list ap) +{ + va_list ap2; + int r, len; + u_char *p; + + va_copy(ap2, ap); + if ((len = vsnprintf(NULL, 0, fmt, ap2)) < 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if (len == 0) { + r = 0; + goto out; /* Nothing to do */ + } + va_end(ap2); + va_copy(ap2, ap); + if ((r = sshbuf_reserve(buf, (size_t)len + 1, &p)) < 0) + goto out; + if ((r = vsnprintf((char *)p, len + 1, fmt, ap2)) != len) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; /* Shouldn't happen */ + } + /* Consume terminating \0 */ + if ((r = sshbuf_consume_end(buf, 1)) != 0) + goto out; + r = 0; + out: + va_end(ap2); + return r; +} + +int +sshbuf_put_u64(struct sshbuf *buf, u_int64_t val) +{ + u_char *p; + int r; + + if ((r = sshbuf_reserve(buf, 8, &p)) < 0) + return r; + POKE_U64(p, val); + return 0; +} + +int +sshbuf_put_u32(struct sshbuf *buf, u_int32_t val) +{ + u_char *p; + int r; + + if ((r = sshbuf_reserve(buf, 4, &p)) < 0) + return r; + POKE_U32(p, val); + return 0; +} + +int +sshbuf_put_u16(struct sshbuf *buf, u_int16_t val) +{ + u_char *p; + int r; + + if ((r = sshbuf_reserve(buf, 2, &p)) < 0) + return r; + POKE_U16(p, val); + return 0; +} + +int +sshbuf_put_u8(struct sshbuf *buf, u_char val) +{ + u_char *p; + int r; + + if ((r = sshbuf_reserve(buf, 1, &p)) < 0) + return r; + p[0] = val; + return 0; +} + +int +sshbuf_put_string(struct sshbuf *buf, const void *v, size_t len) +{ + u_char *d; + int r; + + if (len > SSHBUF_SIZE_MAX - 4) { + SSHBUF_DBG(("SSH_ERR_NO_BUFFER_SPACE")); + return SSH_ERR_NO_BUFFER_SPACE; + } + if ((r = sshbuf_reserve(buf, len + 4, &d)) < 0) + return r; + POKE_U32(d, len); + if (len != 0) + memcpy(d + 4, v, len); + return 0; +} + +int +sshbuf_put_cstring(struct sshbuf *buf, const char *v) +{ + return sshbuf_put_string(buf, (u_char *)v, v == NULL ? 0 : strlen(v)); +} + +int +sshbuf_put_stringb(struct sshbuf *buf, const struct sshbuf *v) +{ + return sshbuf_put_string(buf, sshbuf_ptr(v), sshbuf_len(v)); +} + +int +sshbuf_froms(struct sshbuf *buf, struct sshbuf **bufp) +{ + const u_char *p; + size_t len; + struct sshbuf *ret; + int r; + + if (buf == NULL || bufp == NULL) + return SSH_ERR_INVALID_ARGUMENT; + *bufp = NULL; + if ((r = sshbuf_peek_string_direct(buf, &p, &len)) != 0) + return r; + if ((ret = sshbuf_from(p, len)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_consume(buf, len + 4)) != 0 || /* Shouldn't happen */ + (r = sshbuf_set_parent(ret, buf)) != 0) { + sshbuf_free(ret); + return r; + } + *bufp = ret; + return 0; +} + +int +sshbuf_put_bignum2_bytes(struct sshbuf *buf, const void *v, size_t len) +{ + u_char *d; + const u_char *s = (const u_char *)v; + int r, prepend; + + if (len > SSHBUF_SIZE_MAX - 5) { + SSHBUF_DBG(("SSH_ERR_NO_BUFFER_SPACE")); + return SSH_ERR_NO_BUFFER_SPACE; + } + /* Skip leading zero bytes */ + for (; len > 0 && *s == 0; len--, s++) + ; + /* + * If most significant bit is set then prepend a zero byte to + * avoid interpretation as a negative number. + */ + prepend = len > 0 && (s[0] & 0x80) != 0; + if ((r = sshbuf_reserve(buf, len + 4 + prepend, &d)) < 0) + return r; + POKE_U32(d, len + prepend); + if (prepend) + d[4] = 0; + if (len != 0) + memcpy(d + 4 + prepend, s, len); + return 0; +} + +int +sshbuf_get_bignum2_bytes_direct(struct sshbuf *buf, + const u_char **valp, size_t *lenp) +{ + const u_char *d; + size_t len, olen; + int r; + + if ((r = sshbuf_peek_string_direct(buf, &d, &olen)) < 0) + return r; + len = olen; + /* Refuse negative (MSB set) bignums */ + if ((len != 0 && (*d & 0x80) != 0)) + return SSH_ERR_BIGNUM_IS_NEGATIVE; + /* Refuse overlong bignums, allow prepended \0 to avoid MSB set */ + if (len > SSHBUF_MAX_BIGNUM + 1 || + (len == SSHBUF_MAX_BIGNUM + 1 && *d != 0)) + return SSH_ERR_BIGNUM_TOO_LARGE; + /* Trim leading zeros */ + while (len > 0 && *d == 0x00) { + d++; + len--; + } + if (valp != 0) + *valp = d; + if (lenp != NULL) + *lenp = len; + if (sshbuf_consume(buf, olen + 4) != 0) { + /* Shouldn't happen */ + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + SSHBUF_ABORT(); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} diff --git a/sshbuf-getput-crypto.c b/sshbuf-getput-crypto.c new file mode 100644 index 0000000..e2e093c --- /dev/null +++ b/sshbuf-getput-crypto.c @@ -0,0 +1,224 @@ +/* $OpenBSD: sshbuf-getput-crypto.c,v 1.4 2015/01/14 15:02:39 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#define SSHBUF_INTERNAL +#include "includes.h" + +#include +#include +#include +#include + +#include +#ifdef OPENSSL_HAS_ECC +# include +#endif /* OPENSSL_HAS_ECC */ + +#include "ssherr.h" +#include "sshbuf.h" + +int +sshbuf_get_bignum2(struct sshbuf *buf, BIGNUM *v) +{ + const u_char *d; + size_t len; + int r; + + if ((r = sshbuf_get_bignum2_bytes_direct(buf, &d, &len)) != 0) + return r; + if (v != NULL && BN_bin2bn(d, len, v) == NULL) + return SSH_ERR_ALLOC_FAIL; + return 0; +} + +int +sshbuf_get_bignum1(struct sshbuf *buf, BIGNUM *v) +{ + const u_char *d = sshbuf_ptr(buf); + u_int16_t len_bits; + size_t len_bytes; + + /* Length in bits */ + if (sshbuf_len(buf) < 2) + return SSH_ERR_MESSAGE_INCOMPLETE; + len_bits = PEEK_U16(d); + len_bytes = (len_bits + 7) >> 3; + if (len_bytes > SSHBUF_MAX_BIGNUM) + return SSH_ERR_BIGNUM_TOO_LARGE; + if (sshbuf_len(buf) < 2 + len_bytes) + return SSH_ERR_MESSAGE_INCOMPLETE; + if (v != NULL && BN_bin2bn(d + 2, len_bytes, v) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (sshbuf_consume(buf, 2 + len_bytes) != 0) { + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + SSHBUF_ABORT(); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +#ifdef OPENSSL_HAS_ECC +static int +get_ec(const u_char *d, size_t len, EC_POINT *v, const EC_GROUP *g) +{ + /* Refuse overlong bignums */ + if (len == 0 || len > SSHBUF_MAX_ECPOINT) + return SSH_ERR_ECPOINT_TOO_LARGE; + /* Only handle uncompressed points */ + if (*d != POINT_CONVERSION_UNCOMPRESSED) + return SSH_ERR_INVALID_FORMAT; + if (v != NULL && EC_POINT_oct2point(g, v, d, len, NULL) != 1) + return SSH_ERR_INVALID_FORMAT; /* XXX assumption */ + return 0; +} + +int +sshbuf_get_ec(struct sshbuf *buf, EC_POINT *v, const EC_GROUP *g) +{ + const u_char *d; + size_t len; + int r; + + if ((r = sshbuf_peek_string_direct(buf, &d, &len)) < 0) + return r; + if ((r = get_ec(d, len, v, g)) != 0) + return r; + /* Skip string */ + if (sshbuf_get_string_direct(buf, NULL, NULL) != 0) { + /* Shouldn't happen */ + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + SSHBUF_ABORT(); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +int +sshbuf_get_eckey(struct sshbuf *buf, EC_KEY *v) +{ + EC_POINT *pt = EC_POINT_new(EC_KEY_get0_group(v)); + int r; + const u_char *d; + size_t len; + + if (pt == NULL) { + SSHBUF_DBG(("SSH_ERR_ALLOC_FAIL")); + return SSH_ERR_ALLOC_FAIL; + } + if ((r = sshbuf_peek_string_direct(buf, &d, &len)) < 0) { + EC_POINT_free(pt); + return r; + } + if ((r = get_ec(d, len, pt, EC_KEY_get0_group(v))) != 0) { + EC_POINT_free(pt); + return r; + } + if (EC_KEY_set_public_key(v, pt) != 1) { + EC_POINT_free(pt); + return SSH_ERR_ALLOC_FAIL; /* XXX assumption */ + } + EC_POINT_free(pt); + /* Skip string */ + if (sshbuf_get_string_direct(buf, NULL, NULL) != 0) { + /* Shouldn't happen */ + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + SSHBUF_ABORT(); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} +#endif /* OPENSSL_HAS_ECC */ + +int +sshbuf_put_bignum2(struct sshbuf *buf, const BIGNUM *v) +{ + u_char d[SSHBUF_MAX_BIGNUM + 1]; + int len = BN_num_bytes(v), prepend = 0, r; + + if (len < 0 || len > SSHBUF_MAX_BIGNUM) + return SSH_ERR_INVALID_ARGUMENT; + *d = '\0'; + if (BN_bn2bin(v, d + 1) != len) + return SSH_ERR_INTERNAL_ERROR; /* Shouldn't happen */ + /* If MSB is set, prepend a \0 */ + if (len > 0 && (d[1] & 0x80) != 0) + prepend = 1; + if ((r = sshbuf_put_string(buf, d + 1 - prepend, len + prepend)) < 0) { + bzero(d, sizeof(d)); + return r; + } + bzero(d, sizeof(d)); + return 0; +} + +int +sshbuf_put_bignum1(struct sshbuf *buf, const BIGNUM *v) +{ + int r, len_bits = BN_num_bits(v); + size_t len_bytes = (len_bits + 7) / 8; + u_char d[SSHBUF_MAX_BIGNUM], *dp; + + if (len_bits < 0 || len_bytes > SSHBUF_MAX_BIGNUM) + return SSH_ERR_INVALID_ARGUMENT; + if (BN_bn2bin(v, d) != (int)len_bytes) + return SSH_ERR_INTERNAL_ERROR; /* Shouldn't happen */ + if ((r = sshbuf_reserve(buf, len_bytes + 2, &dp)) < 0) { + bzero(d, sizeof(d)); + return r; + } + POKE_U16(dp, len_bits); + if (len_bytes != 0) + memcpy(dp + 2, d, len_bytes); + bzero(d, sizeof(d)); + return 0; +} + +#ifdef OPENSSL_HAS_ECC +int +sshbuf_put_ec(struct sshbuf *buf, const EC_POINT *v, const EC_GROUP *g) +{ + u_char d[SSHBUF_MAX_ECPOINT]; + BN_CTX *bn_ctx; + size_t len; + int ret; + + if ((bn_ctx = BN_CTX_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((len = EC_POINT_point2oct(g, v, POINT_CONVERSION_UNCOMPRESSED, + NULL, 0, bn_ctx)) > SSHBUF_MAX_ECPOINT) { + BN_CTX_free(bn_ctx); + return SSH_ERR_INVALID_ARGUMENT; + } + if (EC_POINT_point2oct(g, v, POINT_CONVERSION_UNCOMPRESSED, + d, len, bn_ctx) != len) { + BN_CTX_free(bn_ctx); + return SSH_ERR_INTERNAL_ERROR; /* Shouldn't happen */ + } + BN_CTX_free(bn_ctx); + ret = sshbuf_put_string(buf, d, len); + bzero(d, len); + return ret; +} + +int +sshbuf_put_eckey(struct sshbuf *buf, const EC_KEY *v) +{ + return sshbuf_put_ec(buf, EC_KEY_get0_public_key(v), + EC_KEY_get0_group(v)); +} +#endif /* OPENSSL_HAS_ECC */ + diff --git a/sshbuf-misc.c b/sshbuf-misc.c new file mode 100644 index 0000000..d022065 --- /dev/null +++ b/sshbuf-misc.c @@ -0,0 +1,138 @@ +/* $OpenBSD: sshbuf-misc.c,v 1.4 2015/03/24 20:03:44 markus Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "includes.h" + +#include +#include +#include +#include +#include +#ifdef HAVE_STDINT_H +#include +#endif +#include +#include +#include +#include +#include + +#include "ssherr.h" +#define SSHBUF_INTERNAL +#include "sshbuf.h" + +void +sshbuf_dump_data(const void *s, size_t len, FILE *f) +{ + size_t i, j; + const u_char *p = (const u_char *)s; + + for (i = 0; i < len; i += 16) { + fprintf(f, "%.4zu: ", i); + for (j = i; j < i + 16; j++) { + if (j < len) + fprintf(f, "%02x ", p[j]); + else + fprintf(f, " "); + } + fprintf(f, " "); + for (j = i; j < i + 16; j++) { + if (j < len) { + if (isascii(p[j]) && isprint(p[j])) + fprintf(f, "%c", p[j]); + else + fprintf(f, "."); + } + } + fprintf(f, "\n"); + } +} + +void +sshbuf_dump(struct sshbuf *buf, FILE *f) +{ + fprintf(f, "buffer %p len = %zu\n", buf, sshbuf_len(buf)); + sshbuf_dump_data(sshbuf_ptr(buf), sshbuf_len(buf), f); +} + +char * +sshbuf_dtob16(struct sshbuf *buf) +{ + size_t i, j, len = sshbuf_len(buf); + const u_char *p = sshbuf_ptr(buf); + char *ret; + const char hex[] = "0123456789abcdef"; + + if (len == 0) + return strdup(""); + if (SIZE_MAX / 2 <= len || (ret = malloc(len * 2 + 1)) == NULL) + return NULL; + for (i = j = 0; i < len; i++) { + ret[j++] = hex[(p[i] >> 4) & 0xf]; + ret[j++] = hex[p[i] & 0xf]; + } + ret[j] = '\0'; + return ret; +} + +char * +sshbuf_dtob64(struct sshbuf *buf) +{ + size_t len = sshbuf_len(buf), plen; + const u_char *p = sshbuf_ptr(buf); + char *ret; + int r; + + if (len == 0) + return strdup(""); + plen = ((len + 2) / 3) * 4 + 1; + if (SIZE_MAX / 2 <= len || (ret = malloc(plen)) == NULL) + return NULL; + if ((r = b64_ntop(p, len, ret, plen)) == -1) { + bzero(ret, plen); + free(ret); + return NULL; + } + return ret; +} + +int +sshbuf_b64tod(struct sshbuf *buf, const char *b64) +{ + size_t plen = strlen(b64); + int nlen, r; + u_char *p; + + if (plen == 0) + return 0; + if ((p = malloc(plen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((nlen = b64_pton(b64, p, plen)) < 0) { + bzero(p, plen); + free(p); + return SSH_ERR_INVALID_FORMAT; + } + if ((r = sshbuf_put(buf, p, nlen)) < 0) { + bzero(p, plen); + free(p); + return r; + } + bzero(p, plen); + free(p); + return 0; +} + diff --git a/sshbuf.c b/sshbuf.c new file mode 100644 index 0000000..dbe0c91 --- /dev/null +++ b/sshbuf.c @@ -0,0 +1,406 @@ +/* $OpenBSD: sshbuf.c,v 1.3 2015/01/20 23:14:00 deraadt Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#define SSHBUF_INTERNAL +#include "includes.h" + +#include /* roundup */ +#include +#include +#include +#include +#include + +#include "ssherr.h" +#include "sshbuf.h" + +static inline int +sshbuf_check_sanity(const struct sshbuf *buf) +{ + SSHBUF_TELL("sanity"); + if (__predict_false(buf == NULL || + (!buf->readonly && buf->d != buf->cd) || + buf->refcount < 1 || buf->refcount > SSHBUF_REFS_MAX || + buf->cd == NULL || + (buf->dont_free && (buf->readonly || buf->parent != NULL)) || + buf->max_size > SSHBUF_SIZE_MAX || + buf->alloc > buf->max_size || + buf->size > buf->alloc || + buf->off > buf->size)) { + /* Do not try to recover from corrupted buffer internals */ + SSHBUF_DBG(("SSH_ERR_INTERNAL_ERROR")); + signal(SIGSEGV, SIG_DFL); + raise(SIGSEGV); + return SSH_ERR_INTERNAL_ERROR; + } + return 0; +} + +static void +sshbuf_maybe_pack(struct sshbuf *buf, int force) +{ + SSHBUF_DBG(("force %d", force)); + SSHBUF_TELL("pre-pack"); + if (buf->off == 0 || buf->readonly || buf->refcount > 1) + return; + if (force || + (buf->off >= SSHBUF_PACK_MIN && buf->off >= buf->size / 2)) { + memmove(buf->d, buf->d + buf->off, buf->size - buf->off); + buf->size -= buf->off; + buf->off = 0; + SSHBUF_TELL("packed"); + } +} + +struct sshbuf * +sshbuf_new(void) +{ + struct sshbuf *ret; + + if ((ret = calloc(sizeof(*ret), 1)) == NULL) + return NULL; + ret->alloc = SSHBUF_SIZE_INIT; + ret->max_size = SSHBUF_SIZE_MAX; + ret->readonly = 0; + ret->refcount = 1; + ret->parent = NULL; + if ((ret->cd = ret->d = calloc(1, ret->alloc)) == NULL) { + free(ret); + return NULL; + } + return ret; +} + +struct sshbuf * +sshbuf_from(const void *blob, size_t len) +{ + struct sshbuf *ret; + + if (blob == NULL || len > SSHBUF_SIZE_MAX || + (ret = calloc(sizeof(*ret), 1)) == NULL) + return NULL; + ret->alloc = ret->size = ret->max_size = len; + ret->readonly = 1; + ret->refcount = 1; + ret->parent = NULL; + ret->cd = blob; + ret->d = NULL; + return ret; +} + +int +sshbuf_set_parent(struct sshbuf *child, struct sshbuf *parent) +{ + int r; + + if ((r = sshbuf_check_sanity(child)) != 0 || + (r = sshbuf_check_sanity(parent)) != 0) + return r; + child->parent = parent; + child->parent->refcount++; + return 0; +} + +struct sshbuf * +sshbuf_fromb(struct sshbuf *buf) +{ + struct sshbuf *ret; + + if (sshbuf_check_sanity(buf) != 0) + return NULL; + if ((ret = sshbuf_from(sshbuf_ptr(buf), sshbuf_len(buf))) == NULL) + return NULL; + if (sshbuf_set_parent(ret, buf) != 0) { + sshbuf_free(ret); + return NULL; + } + return ret; +} + +void +sshbuf_init(struct sshbuf *ret) +{ + bzero(ret, sizeof(*ret)); + ret->alloc = SSHBUF_SIZE_INIT; + ret->max_size = SSHBUF_SIZE_MAX; + ret->readonly = 0; + ret->dont_free = 1; + ret->refcount = 1; + if ((ret->cd = ret->d = calloc(1, ret->alloc)) == NULL) + ret->alloc = 0; +} + +void +sshbuf_free(struct sshbuf *buf) +{ + int dont_free = 0; + + if (buf == NULL) + return; + /* + * The following will leak on insane buffers, but this is the safest + * course of action - an invalid pointer or already-freed pointer may + * have been passed to us and continuing to scribble over memory would + * be bad. + */ + if (sshbuf_check_sanity(buf) != 0) + return; + /* + * If we are a child, the free our parent to decrement its reference + * count and possibly free it. + */ + if (buf->parent != NULL) { + sshbuf_free(buf->parent); + buf->parent = NULL; + } + /* + * If we are a parent with still-extant children, then don't free just + * yet. The last child's call to sshbuf_free should decrement our + * refcount to 0 and trigger the actual free. + */ + buf->refcount--; + if (buf->refcount > 0) + return; + dont_free = buf->dont_free; + if (!buf->readonly) { + bzero(buf->d, buf->alloc); + free(buf->d); + } + bzero(buf, sizeof(*buf)); + if (!dont_free) + free(buf); +} + +void +sshbuf_reset(struct sshbuf *buf) +{ + u_char *d; + + if (buf->readonly || buf->refcount > 1) { + /* Nonsensical. Just make buffer appear empty */ + buf->off = buf->size; + return; + } + if (sshbuf_check_sanity(buf) == 0) + bzero(buf->d, buf->alloc); + buf->off = buf->size = 0; + if (buf->alloc != SSHBUF_SIZE_INIT) { + if ((d = realloc(buf->d, SSHBUF_SIZE_INIT)) != NULL) { + buf->cd = buf->d = d; + buf->alloc = SSHBUF_SIZE_INIT; + } + } +} + +size_t +sshbuf_max_size(const struct sshbuf *buf) +{ + return buf->max_size; +} + +size_t +sshbuf_alloc(const struct sshbuf *buf) +{ + return buf->alloc; +} + +const struct sshbuf * +sshbuf_parent(const struct sshbuf *buf) +{ + return buf->parent; +} + +u_int +sshbuf_refcount(const struct sshbuf *buf) +{ + return buf->refcount; +} + +int +sshbuf_set_max_size(struct sshbuf *buf, size_t max_size) +{ + size_t rlen; + u_char *dp; + int r; + + SSHBUF_DBG(("set max buf = %p len = %zu", buf, max_size)); + if ((r = sshbuf_check_sanity(buf)) != 0) + return r; + if (max_size == buf->max_size) + return 0; + if (buf->readonly || buf->refcount > 1) + return SSH_ERR_BUFFER_READ_ONLY; + if (max_size > SSHBUF_SIZE_MAX) + return SSH_ERR_NO_BUFFER_SPACE; + /* pack and realloc if necessary */ + sshbuf_maybe_pack(buf, max_size < buf->size); + if (max_size < buf->alloc && max_size > buf->size) { + if (buf->size < SSHBUF_SIZE_INIT) + rlen = SSHBUF_SIZE_INIT; + else + rlen = roundup(buf->size, SSHBUF_SIZE_INC); + if (rlen > max_size) + rlen = max_size; + bzero(buf->d + buf->size, buf->alloc - buf->size); + SSHBUF_DBG(("new alloc = %zu", rlen)); + if ((dp = realloc(buf->d, rlen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + buf->cd = buf->d = dp; + buf->alloc = rlen; + } + SSHBUF_TELL("new-max"); + if (max_size < buf->alloc) + return SSH_ERR_NO_BUFFER_SPACE; + buf->max_size = max_size; + return 0; +} + +size_t +sshbuf_len(const struct sshbuf *buf) +{ + if (sshbuf_check_sanity(buf) != 0) + return 0; + return buf->size - buf->off; +} + +size_t +sshbuf_avail(const struct sshbuf *buf) +{ + if (sshbuf_check_sanity(buf) != 0 || buf->readonly || buf->refcount > 1) + return 0; + return buf->max_size - (buf->size - buf->off); +} + +const u_char * +sshbuf_ptr(const struct sshbuf *buf) +{ + if (sshbuf_check_sanity(buf) != 0) + return NULL; + return buf->cd + buf->off; +} + +u_char * +sshbuf_mutable_ptr(const struct sshbuf *buf) +{ + if (sshbuf_check_sanity(buf) != 0 || buf->readonly || buf->refcount > 1) + return NULL; + return buf->d + buf->off; +} + +int +sshbuf_check_reserve(const struct sshbuf *buf, size_t len) +{ + int r; + + if ((r = sshbuf_check_sanity(buf)) != 0) + return r; + if (buf->readonly || buf->refcount > 1) + return SSH_ERR_BUFFER_READ_ONLY; + SSHBUF_TELL("check"); + /* Check that len is reasonable and that max_size + available < len */ + if (len > buf->max_size || buf->max_size - len < buf->size - buf->off) + return SSH_ERR_NO_BUFFER_SPACE; + return 0; +} + +int +sshbuf_reserve(struct sshbuf *buf, size_t len, u_char **dpp) +{ + size_t rlen, need; + u_char *dp; + int r; + + if (dpp != NULL) + *dpp = NULL; + + SSHBUF_DBG(("reserve buf = %p len = %zu", buf, len)); + if ((r = sshbuf_check_reserve(buf, len)) != 0) + return r; + /* + * If the requested allocation appended would push us past max_size + * then pack the buffer, zeroing buf->off. + */ + sshbuf_maybe_pack(buf, buf->size + len > buf->max_size); + SSHBUF_TELL("reserve"); + if (len + buf->size > buf->alloc) { + /* + * Prefer to alloc in SSHBUF_SIZE_INC units, but + * allocate less if doing so would overflow max_size. + */ + need = len + buf->size - buf->alloc; + rlen = roundup(buf->alloc + need, SSHBUF_SIZE_INC); + SSHBUF_DBG(("need %zu initial rlen %zu", need, rlen)); + if (rlen > buf->max_size) + rlen = buf->alloc + need; + SSHBUF_DBG(("adjusted rlen %zu", rlen)); + if ((dp = realloc(buf->d, rlen)) == NULL) { + SSHBUF_DBG(("realloc fail")); + if (dpp != NULL) + *dpp = NULL; + return SSH_ERR_ALLOC_FAIL; + } + buf->alloc = rlen; + buf->cd = buf->d = dp; + if ((r = sshbuf_check_reserve(buf, len)) < 0) { + /* shouldn't fail */ + if (dpp != NULL) + *dpp = NULL; + return r; + } + } + dp = buf->d + buf->size; + buf->size += len; + SSHBUF_TELL("done"); + if (dpp != NULL) + *dpp = dp; + return 0; +} + +int +sshbuf_consume(struct sshbuf *buf, size_t len) +{ + int r; + + SSHBUF_DBG(("len = %zu", len)); + if ((r = sshbuf_check_sanity(buf)) != 0) + return r; + if (len == 0) + return 0; + if (len > sshbuf_len(buf)) + return SSH_ERR_MESSAGE_INCOMPLETE; + buf->off += len; + SSHBUF_TELL("done"); + return 0; +} + +int +sshbuf_consume_end(struct sshbuf *buf, size_t len) +{ + int r; + + SSHBUF_DBG(("len = %zu", len)); + if ((r = sshbuf_check_sanity(buf)) != 0) + return r; + if (len == 0) + return 0; + if (len > sshbuf_len(buf)) + return SSH_ERR_MESSAGE_INCOMPLETE; + buf->size -= len; + SSHBUF_TELL("done"); + return 0; +} + diff --git a/sshbuf.h b/sshbuf.h new file mode 100644 index 0000000..eb0d92e --- /dev/null +++ b/sshbuf.h @@ -0,0 +1,338 @@ +/* $OpenBSD: sshbuf.h,v 1.4 2015/01/14 15:02:39 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _SSHBUF_H +#define _SSHBUF_H + +#include +#include +#include +#ifdef WITH_OPENSSL +# include +# ifdef OPENSSL_HAS_ECC +# include +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + +#define SSHBUF_SIZE_MAX 0x8000000 /* Hard maximum size */ +#define SSHBUF_REFS_MAX 0x100000 /* Max child buffers */ +#define SSHBUF_MAX_BIGNUM (16384 / 8) /* Max bignum *bytes* */ +#define SSHBUF_MAX_ECPOINT ((528 * 2 / 8) + 1) /* Max EC point *bytes* */ + +/* + * NB. do not depend on the internals of this. It will be made opaque + * one day. + */ +struct sshbuf { + u_char *d; /* Data */ + const u_char *cd; /* Const data */ + size_t off; /* First available byte is buf->d + buf->off */ + size_t size; /* Last byte is buf->d + buf->size - 1 */ + size_t max_size; /* Maximum size of buffer */ + size_t alloc; /* Total bytes allocated to buf->d */ + int readonly; /* Refers to external, const data */ + int dont_free; /* Kludge to support sshbuf_init */ + u_int refcount; /* Tracks self and number of child buffers */ + struct sshbuf *parent; /* If child, pointer to parent */ +}; + +#ifndef SSHBUF_NO_DEPREACTED +/* + * NB. Please do not use sshbuf_init() in new code. Please use sshbuf_new() + * instead. sshbuf_init() is deprectated and will go away soon (it is + * only included to allow compat with buffer_* in OpenSSH) + */ +void sshbuf_init(struct sshbuf *buf); +#endif + +/* + * Create a new sshbuf buffer. + * Returns pointer to buffer on success, or NULL on allocation failure. + */ +struct sshbuf *sshbuf_new(void); + +/* + * Create a new, read-only sshbuf buffer from existing data. + * Returns pointer to buffer on success, or NULL on allocation failure. + */ +struct sshbuf *sshbuf_from(const void *blob, size_t len); + +/* + * Create a new, read-only sshbuf buffer from the contents of an existing + * buffer. The contents of "buf" must not change in the lifetime of the + * resultant buffer. + * Returns pointer to buffer on success, or NULL on allocation failure. + */ +struct sshbuf *sshbuf_fromb(struct sshbuf *buf); + +/* + * Create a new, read-only sshbuf buffer from the contents of a string in + * an existing buffer (the string is consumed in the process). + * The contents of "buf" must not change in the lifetime of the resultant + * buffer. + * Returns pointer to buffer on success, or NULL on allocation failure. + */ +int sshbuf_froms(struct sshbuf *buf, struct sshbuf **bufp); + +/* + * Clear and free buf + */ +void sshbuf_free(struct sshbuf *buf); + +/* + * Reset buf, clearing its contents. NB. max_size is preserved. + */ +void sshbuf_reset(struct sshbuf *buf); + +/* + * Return the maximum size of buf + */ +size_t sshbuf_max_size(const struct sshbuf *buf); + +/* + * Set the maximum size of buf + * Returns 0 on success, or a negative SSH_ERR_* error code on failure. + */ +int sshbuf_set_max_size(struct sshbuf *buf, size_t max_size); + +/* + * Returns the length of data in buf + */ +size_t sshbuf_len(const struct sshbuf *buf); + +/* + * Returns number of bytes left in buffer before hitting max_size. + */ +size_t sshbuf_avail(const struct sshbuf *buf); + +/* + * Returns a read-only pointer to the start of the the data in buf + */ +const u_char *sshbuf_ptr(const struct sshbuf *buf); + +/* + * Returns a mutable pointer to the start of the the data in buf, or + * NULL if the buffer is read-only. + */ +u_char *sshbuf_mutable_ptr(const struct sshbuf *buf); + +/* + * Check whether a reservation of size len will succeed in buf + * Safer to use than direct comparisons again sshbuf_avail as it copes + * with unsigned overflows correctly. + * Returns 0 on success, or a negative SSH_ERR_* error code on failure. + */ +int sshbuf_check_reserve(const struct sshbuf *buf, size_t len); + +/* + * Reserve len bytes in buf. + * Returns 0 on success and a pointer to the first reserved byte via the + * optional dpp parameter or a negative * SSH_ERR_* error code on failure. + */ +int sshbuf_reserve(struct sshbuf *buf, size_t len, u_char **dpp); + +/* + * Consume len bytes from the start of buf + * Returns 0 on success, or a negative SSH_ERR_* error code on failure. + */ +int sshbuf_consume(struct sshbuf *buf, size_t len); + +/* + * Consume len bytes from the end of buf + * Returns 0 on success, or a negative SSH_ERR_* error code on failure. + */ +int sshbuf_consume_end(struct sshbuf *buf, size_t len); + +/* Extract or deposit some bytes */ +int sshbuf_get(struct sshbuf *buf, void *v, size_t len); +int sshbuf_put(struct sshbuf *buf, const void *v, size_t len); +int sshbuf_putb(struct sshbuf *buf, const struct sshbuf *v); + +/* Append using a printf(3) format */ +int sshbuf_putf(struct sshbuf *buf, const char *fmt, ...) + __attribute__((format(printf, 2, 3))); +int sshbuf_putfv(struct sshbuf *buf, const char *fmt, va_list ap); + +/* Functions to extract or store big-endian words of various sizes */ +int sshbuf_get_u64(struct sshbuf *buf, u_int64_t *valp); +int sshbuf_get_u32(struct sshbuf *buf, u_int32_t *valp); +int sshbuf_get_u16(struct sshbuf *buf, u_int16_t *valp); +int sshbuf_get_u8(struct sshbuf *buf, u_char *valp); +int sshbuf_put_u64(struct sshbuf *buf, u_int64_t val); +int sshbuf_put_u32(struct sshbuf *buf, u_int32_t val); +int sshbuf_put_u16(struct sshbuf *buf, u_int16_t val); +int sshbuf_put_u8(struct sshbuf *buf, u_char val); + +/* + * Functions to extract or store SSH wire encoded strings (u32 len || data) + * The "cstring" variants admit no \0 characters in the string contents. + * Caller must free *valp. + */ +int sshbuf_get_string(struct sshbuf *buf, u_char **valp, size_t *lenp); +int sshbuf_get_cstring(struct sshbuf *buf, char **valp, size_t *lenp); +int sshbuf_get_stringb(struct sshbuf *buf, struct sshbuf *v); +int sshbuf_put_string(struct sshbuf *buf, const void *v, size_t len); +int sshbuf_put_cstring(struct sshbuf *buf, const char *v); +int sshbuf_put_stringb(struct sshbuf *buf, const struct sshbuf *v); + +/* + * "Direct" variant of sshbuf_get_string, returns pointer into the sshbuf to + * avoid an malloc+memcpy. The pointer is guaranteed to be valid until the + * next sshbuf-modifying function call. Caller does not free. + */ +int sshbuf_get_string_direct(struct sshbuf *buf, const u_char **valp, + size_t *lenp); + +/* Skip past a string */ +#define sshbuf_skip_string(buf) sshbuf_get_string_direct(buf, NULL, NULL) + +/* Another variant: "peeks" into the buffer without modifying it */ +int sshbuf_peek_string_direct(const struct sshbuf *buf, const u_char **valp, + size_t *lenp); + +/* + * Functions to extract or store SSH wire encoded bignums and elliptic + * curve points. + */ +int sshbuf_put_bignum2_bytes(struct sshbuf *buf, const void *v, size_t len); +int sshbuf_get_bignum2_bytes_direct(struct sshbuf *buf, + const u_char **valp, size_t *lenp); +#ifdef WITH_OPENSSL +int sshbuf_get_bignum2(struct sshbuf *buf, BIGNUM *v); +int sshbuf_get_bignum1(struct sshbuf *buf, BIGNUM *v); +int sshbuf_put_bignum2(struct sshbuf *buf, const BIGNUM *v); +int sshbuf_put_bignum1(struct sshbuf *buf, const BIGNUM *v); +# ifdef OPENSSL_HAS_ECC +int sshbuf_get_ec(struct sshbuf *buf, EC_POINT *v, const EC_GROUP *g); +int sshbuf_get_eckey(struct sshbuf *buf, EC_KEY *v); +int sshbuf_put_ec(struct sshbuf *buf, const EC_POINT *v, const EC_GROUP *g); +int sshbuf_put_eckey(struct sshbuf *buf, const EC_KEY *v); +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + +/* Dump the contents of the buffer in a human-readable format */ +void sshbuf_dump(struct sshbuf *buf, FILE *f); + +/* Dump specified memory in a human-readable format */ +void sshbuf_dump_data(const void *s, size_t len, FILE *f); + +/* Return the hexadecimal representation of the contents of the buffer */ +char *sshbuf_dtob16(struct sshbuf *buf); + +/* Encode the contents of the buffer as base64 */ +char *sshbuf_dtob64(struct sshbuf *buf); + +/* Decode base64 data and append it to the buffer */ +int sshbuf_b64tod(struct sshbuf *buf, const char *b64); + +/* Macros for decoding/encoding integers */ +#define PEEK_U64(p) \ + (((u_int64_t)(((u_char *)(p))[0]) << 56) | \ + ((u_int64_t)(((u_char *)(p))[1]) << 48) | \ + ((u_int64_t)(((u_char *)(p))[2]) << 40) | \ + ((u_int64_t)(((u_char *)(p))[3]) << 32) | \ + ((u_int64_t)(((u_char *)(p))[4]) << 24) | \ + ((u_int64_t)(((u_char *)(p))[5]) << 16) | \ + ((u_int64_t)(((u_char *)(p))[6]) << 8) | \ + (u_int64_t)(((u_char *)(p))[7])) +#define PEEK_U32(p) \ + (((u_int32_t)(((u_char *)(p))[0]) << 24) | \ + ((u_int32_t)(((u_char *)(p))[1]) << 16) | \ + ((u_int32_t)(((u_char *)(p))[2]) << 8) | \ + (u_int32_t)(((u_char *)(p))[3])) +#define PEEK_U16(p) \ + (((u_int16_t)(((u_char *)(p))[0]) << 8) | \ + (u_int16_t)(((u_char *)(p))[1])) + +#define POKE_U64(p, v) \ + do { \ + ((u_char *)(p))[0] = (((u_int64_t)(v)) >> 56) & 0xff; \ + ((u_char *)(p))[1] = (((u_int64_t)(v)) >> 48) & 0xff; \ + ((u_char *)(p))[2] = (((u_int64_t)(v)) >> 40) & 0xff; \ + ((u_char *)(p))[3] = (((u_int64_t)(v)) >> 32) & 0xff; \ + ((u_char *)(p))[4] = (((u_int64_t)(v)) >> 24) & 0xff; \ + ((u_char *)(p))[5] = (((u_int64_t)(v)) >> 16) & 0xff; \ + ((u_char *)(p))[6] = (((u_int64_t)(v)) >> 8) & 0xff; \ + ((u_char *)(p))[7] = ((u_int64_t)(v)) & 0xff; \ + } while (0) +#define POKE_U32(p, v) \ + do { \ + ((u_char *)(p))[0] = (((u_int64_t)(v)) >> 24) & 0xff; \ + ((u_char *)(p))[1] = (((u_int64_t)(v)) >> 16) & 0xff; \ + ((u_char *)(p))[2] = (((u_int64_t)(v)) >> 8) & 0xff; \ + ((u_char *)(p))[3] = ((u_int64_t)(v)) & 0xff; \ + } while (0) +#define POKE_U16(p, v) \ + do { \ + ((u_char *)(p))[0] = (((u_int64_t)(v)) >> 8) & 0xff; \ + ((u_char *)(p))[1] = ((u_int64_t)(v)) & 0xff; \ + } while (0) + +/* Internal definitions follow. Exposed for regress tests */ +#ifdef SSHBUF_INTERNAL + +/* + * Return the allocation size of buf + */ +size_t sshbuf_alloc(const struct sshbuf *buf); + +/* + * Increment the reference count of buf. + */ +int sshbuf_set_parent(struct sshbuf *child, struct sshbuf *parent); + +/* + * Return the parent buffer of buf, or NULL if it has no parent. + */ +const struct sshbuf *sshbuf_parent(const struct sshbuf *buf); + +/* + * Return the reference count of buf + */ +u_int sshbuf_refcount(const struct sshbuf *buf); + +# define SSHBUF_SIZE_INIT 256 /* Initial allocation */ +# define SSHBUF_SIZE_INC 256 /* Preferred increment length */ +# define SSHBUF_PACK_MIN 8192 /* Minimim packable offset */ + +/* # define SSHBUF_ABORT abort */ +/* # define SSHBUF_DEBUG */ + +# ifndef SSHBUF_ABORT +# define SSHBUF_ABORT() +# endif + +# ifdef SSHBUF_DEBUG +# define SSHBUF_TELL(what) do { \ + printf("%s:%d %s: %s size %zu alloc %zu off %zu max %zu\n", \ + __FILE__, __LINE__, __func__, what, \ + buf->size, buf->alloc, buf->off, buf->max_size); \ + fflush(stdout); \ + } while (0) +# define SSHBUF_DBG(x) do { \ + printf("%s:%d %s: ", __FILE__, __LINE__, __func__); \ + printf x; \ + printf("\n"); \ + fflush(stdout); \ + } while (0) +# else +# define SSHBUF_TELL(what) +# define SSHBUF_DBG(x) +# endif +#endif /* SSHBUF_INTERNAL */ + +#endif /* _SSHBUF_H */ diff --git a/sshconnect.c b/sshconnect.c index 94f85f5..c074a5c 100644 --- a/sshconnect.c +++ b/sshconnect.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshconnect.c,v 1.234 2011/05/24 07:15:47 djm Exp $ */ +/* $OpenBSD: sshconnect.c,v 1.263 2015/08/20 22:32:42 deraadt Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -15,6 +15,7 @@ #include "includes.h" +#include /* roundup */ #include #include #include @@ -54,16 +55,20 @@ #include "sshconnect.h" #include "hostfile.h" #include "log.h" +#include "misc.h" #include "readconf.h" #include "atomicio.h" -#include "misc.h" #include "dns.h" #include "roaming.h" +#include "monitor_fdpass.h" #include "ssh2.h" #include "version.h" +#include "authfile.h" +#include "ssherr.h" char *client_version_string = NULL; char *server_version_string = NULL; +Key *previous_host_key = NULL; static int matching_host_key_dns = 0; @@ -89,6 +94,107 @@ extern uid_t original_effective_uid; static int show_other_keys(struct hostkeys *, Key *); static void warn_changed_key(Key *); +/* Expand a proxy command */ +static char * +expand_proxy_command(const char *proxy_command, const char *user, + const char *host, int port) +{ + char *tmp, *ret, strport[NI_MAXSERV]; + + snprintf(strport, sizeof strport, "%d", port); + xasprintf(&tmp, "exec %s", proxy_command); + ret = percent_expand(tmp, "h", host, "p", strport, + "r", options.user, (char *)NULL); + free(tmp); + return ret; +} + +/* + * Connect to the given ssh server using a proxy command that passes a + * a connected fd back to us. + */ +static int +ssh_proxy_fdpass_connect(const char *host, u_short port, + const char *proxy_command) +{ +#ifdef WIN32_FIXME +//PRAGMA:TODO + return 0; +#else + + char *command_string; + int sp[2], sock; + pid_t pid; + char *shell; + + if ((shell = getenv("SHELL")) == NULL) + shell = _PATH_BSHELL; + + if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) < 0) + fatal("Could not create socketpair to communicate with " + "proxy dialer: %.100s", strerror(errno)); + + command_string = expand_proxy_command(proxy_command, options.user, + host, port); + debug("Executing proxy dialer command: %.500s", command_string); + + /* Fork and execute the proxy command. */ + if ((pid = fork()) == 0) { + char *argv[10]; + + /* Child. Permanently give up superuser privileges. */ + permanently_drop_suid(original_real_uid); + + close(sp[1]); + /* Redirect stdin and stdout. */ + if (sp[0] != 0) { + if (dup2(sp[0], 0) < 0) + perror("dup2 stdin"); + } + if (sp[0] != 1) { + if (dup2(sp[0], 1) < 0) + perror("dup2 stdout"); + } + if (sp[0] >= 2) + close(sp[0]); + + /* + * Stderr is left as it is so that error messages get + * printed on the user's terminal. + */ + argv[0] = shell; + argv[1] = "-c"; + argv[2] = command_string; + argv[3] = NULL; + + /* + * Execute the proxy command. + * Note that we gave up any extra privileges above. + */ + execv(argv[0], argv); + perror(argv[0]); + exit(1); + } + /* Parent. */ + if (pid < 0) + fatal("fork failed: %.100s", strerror(errno)); + close(sp[0]); + free(command_string); + + if ((sock = mm_receive_fd(sp[1])) == -1) + fatal("proxy dialer did not pass back a connection"); + + while (waitpid(pid, NULL, 0) == -1) + if (errno != EINTR) + fatal("Couldn't wait for child: %s", strerror(errno)); + + /* Set the connection file descriptors. */ + packet_set_connection(sock, sock); + + return 0; +#endif +} + /* * Connect to the given ssh server using a proxy command. */ @@ -186,7 +292,7 @@ ssh_proxy_connect(const char *host, u_short port, const char *proxy_command) CloseHandle(pi.hThread); - xfree(fullCmd); + free(fullCmd); /* * Error handler. @@ -209,35 +315,21 @@ ssh_proxy_connect(const char *host, u_short port, const char *proxy_command) /* * Original OpenSSH code. */ - - char *command_string, *tmp; + char *command_string; int pin[2], pout[2]; pid_t pid; - char *shell, strport[NI_MAXSERV]; + char *shell; if ((shell = getenv("SHELL")) == NULL || *shell == '\0') shell = _PATH_BSHELL; - /* Convert the port number into a string. */ - snprintf(strport, sizeof strport, "%hu", port); - - /* - * Build the final command string in the buffer by making the - * appropriate substitutions to the given proxy command. - * - * Use "exec" to avoid "sh -c" processes on some platforms - * (e.g. Solaris) - */ - xasprintf(&tmp, "exec %s", proxy_command); - command_string = percent_expand(tmp, "h", host, "p", strport, - "r", options.user, (char *)NULL); - xfree(tmp); - /* Create pipes for communicating with the proxy. */ if (pipe(pin) < 0 || pipe(pout) < 0) fatal("Could not create pipes to communicate with the proxy: %.100s", strerror(errno)); + command_string = expand_proxy_command(proxy_command, options.user, + host, port); debug("Executing proxy command: %.500s", command_string); /* Fork and execute the proxy command. */ @@ -285,17 +377,14 @@ ssh_proxy_connect(const char *host, u_short port, const char *proxy_command) close(pout[1]); /* Free the command name. */ - xfree(command_string); + free(command_string); /* Set the connection file descriptors. */ packet_set_connection(pout[0], pin[1]); - packet_set_timeout(options.server_alive_interval, - options.server_alive_count_max); /* Indicate OK return */ return 0; - - #endif /* else WIN32_FIXME */ +#endif /* else WIN32_FIXME */ } void @@ -317,28 +406,12 @@ ssh_kill_proxy_command(void) static int ssh_create_socket(int privileged, struct addrinfo *ai) { - int sock, gaierr; - struct addrinfo hints, *res; + int sock, r, gaierr; + struct addrinfo hints, *res = NULL; - /* - * If we are running as root and want to connect to a privileged - * port, bind our own socket to a privileged port. - */ - if (privileged) { - int p = IPPORT_RESERVED - 1; - PRIV_START; - sock = rresvport_af(&p, ai->ai_family); - PRIV_END; - if (sock < 0) - error("rresvport: af=%d %.100s", ai->ai_family, - strerror(errno)); - else - debug("Allocated local port %d.", p); - return sock; - } sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (sock < 0) { - error("socket: %.100s", strerror(errno)); + error("socket: %s", strerror(errno)); return -1; } #ifndef WIN32_FIXME @@ -346,28 +419,48 @@ ssh_create_socket(int privileged, struct addrinfo *ai) #endif /* Bind the socket to an alternative local IP address */ - if (options.bind_address == NULL) + if (options.bind_address == NULL && !privileged) return sock; - memset(&hints, 0, sizeof(hints)); - hints.ai_family = ai->ai_family; - hints.ai_socktype = ai->ai_socktype; - hints.ai_protocol = ai->ai_protocol; - hints.ai_flags = AI_PASSIVE; - gaierr = getaddrinfo(options.bind_address, NULL, &hints, &res); - if (gaierr) { - error("getaddrinfo: %s: %s", options.bind_address, - ssh_gai_strerror(gaierr)); - close(sock); - return -1; + if (options.bind_address) { + memset(&hints, 0, sizeof(hints)); + hints.ai_family = ai->ai_family; + hints.ai_socktype = ai->ai_socktype; + hints.ai_protocol = ai->ai_protocol; + hints.ai_flags = AI_PASSIVE; + gaierr = getaddrinfo(options.bind_address, NULL, &hints, &res); + if (gaierr) { + error("getaddrinfo: %s: %s", options.bind_address, + ssh_gai_strerror(gaierr)); + close(sock); + return -1; + } } - if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { - error("bind: %s: %s", options.bind_address, strerror(errno)); - close(sock); + /* + * If we are running as root and want to connect to a privileged + * port, bind our own socket to a privileged port. + */ + if (privileged) { + PRIV_START; + r = bindresvport_sa(sock, res ? res->ai_addr : NULL); + PRIV_END; + if (r < 0) { + error("bindresvport_sa: af=%d %s", ai->ai_family, + strerror(errno)); + goto fail; + } + } else { + if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { + error("bind: %s: %s", options.bind_address, + strerror(errno)); + fail: + close(sock); + freeaddrinfo(res); + return -1; + } + } + if (res != NULL) freeaddrinfo(res); - return -1; - } - freeaddrinfo(res); return sock; } @@ -398,15 +491,16 @@ timeout_connect(int sockfd, const struct sockaddr *serv_addr, result = -1; goto done; } - + #ifndef WIN32_FIXME - fdset = (fd_set *)xcalloc(howmany(sockfd + 1, NFDBITS), + fdset = xcalloc(howmany(sockfd + 1, NFDBITS), sizeof(fd_mask)); #else fdset = xmalloc(sizeof(fd_set)); FD_ZERO(fdset); #endif + FD_SET(sockfd, fdset); ms_to_timeval(&tv, *timeoutp); @@ -446,7 +540,7 @@ timeout_connect(int sockfd, const struct sockaddr *serv_addr, fatal("Bogus return (%d) from select()", rc); } - xfree(fdset); + free(fdset); done: if (result == 0 && *timeoutp > 0) { @@ -471,39 +565,23 @@ timeout_connect(int sockfd, const struct sockaddr *serv_addr, * and %p substituted for host and port, respectively) to use to contact * the daemon. */ -int -ssh_connect(const char *host, struct sockaddr_storage * hostaddr, - u_short port, int family, int connection_attempts, int *timeout_ms, - int want_keepalive, int needpriv, const char *proxy_command) +static int +ssh_connect_direct(const char *host, struct addrinfo *aitop, + struct sockaddr_storage *hostaddr, u_short port, int family, + int connection_attempts, int *timeout_ms, int want_keepalive, int needpriv) { - int gaierr; int on = 1; int sock = -1, attempt; char ntop[NI_MAXHOST], strport[NI_MAXSERV]; - struct addrinfo hints, *ai, *aitop; + struct addrinfo *ai; #ifdef WIN32_FIXME DWORD error_win32 = 0; #endif - debug2("ssh_connect: needpriv %d", needpriv); - /* If a proxy command is given, connect using it. */ - if (proxy_command != NULL) - return ssh_proxy_connect(host, port, proxy_command); - - /* No proxy command. */ - - memset(&hints, 0, sizeof(hints)); - hints.ai_family = family; - hints.ai_socktype = SOCK_STREAM; - snprintf(strport, sizeof strport, "%u", port); - if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) - fatal("%s: Could not resolve hostname %.100s: %s", __progname, - host, ssh_gai_strerror(gaierr)); - for (attempt = 0; attempt < connection_attempts; attempt++) { if (attempt > 0) { /* Sleep a moment before retrying. */ @@ -515,7 +593,8 @@ ssh_connect(const char *host, struct sockaddr_storage * hostaddr, * sequence until the connection succeeds. */ for (ai = aitop; ai; ai = ai->ai_next) { - if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) + if (ai->ai_family != AF_INET && + ai->ai_family != AF_INET6) continue; if (getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop, sizeof(ntop), strport, sizeof(strport), @@ -551,8 +630,6 @@ ssh_connect(const char *host, struct sockaddr_storage * hostaddr, break; /* Successful connection. */ } - freeaddrinfo(aitop); - /* Return failure if we didn't get a successful connection. */ if (sock == -1) { #ifdef WIN32_FIXME @@ -573,12 +650,46 @@ ssh_connect(const char *host, struct sockaddr_storage * hostaddr, /* Set the connection. */ packet_set_connection(sock, sock); - packet_set_timeout(options.server_alive_interval, - options.server_alive_count_max); return 0; } +int +ssh_connect(const char *host, struct addrinfo *addrs, + struct sockaddr_storage *hostaddr, u_short port, int family, + int connection_attempts, int *timeout_ms, int want_keepalive, int needpriv) +{ + if (options.proxy_command == NULL) { + return ssh_connect_direct(host, addrs, hostaddr, port, family, + connection_attempts, timeout_ms, want_keepalive, needpriv); + } else if (strcmp(options.proxy_command, "-") == 0) { + packet_set_connection(STDIN_FILENO, STDOUT_FILENO); + return 0; /* Always succeeds */ + } else if (options.proxy_use_fdpass) { + return ssh_proxy_fdpass_connect(host, port, + options.proxy_command); + } + return ssh_proxy_connect(host, port, options.proxy_command); +} + +static void +send_client_banner(int connection_out, int minor1) +{ + /* Send our own protocol version identification. */ + if (compat20) { + xasprintf(&client_version_string, "SSH-%d.%d-%.100s\r\n", + PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION); + } else { + xasprintf(&client_version_string, "SSH-%d.%d-%.100s\n", + PROTOCOL_MAJOR_1, minor1, SSH_VERSION); + } + if (roaming_atomicio(vwrite, connection_out, client_version_string, + strlen(client_version_string)) != strlen(client_version_string)) + fatal("write: %.100s", strerror(errno)); + chop(client_version_string); + debug("Local version string %.100s", client_version_string); +} + /* * Waits for the server identification string, and sends our own * identification string. @@ -590,7 +701,7 @@ ssh_exchange_identification(int timeout_ms) int remote_major, remote_minor, mismatch; int connection_in = packet_get_connection_in(); int connection_out = packet_get_connection_out(); - int minor1 = PROTOCOL_MINOR_1; + int minor1 = PROTOCOL_MINOR_1, client_banner_sent = 0; u_int i, n; size_t len; int fdsetsz, remaining, rc; @@ -600,6 +711,16 @@ ssh_exchange_identification(int timeout_ms) fdsetsz = howmany(connection_in + 1, NFDBITS) * sizeof(fd_mask); fdset = xcalloc(1, fdsetsz); + /* + * If we are SSH2-only then we can send the banner immediately and + * save a round-trip. + */ + if (options.protocol == SSH_PROTO_2) { + enable_compat20(); + send_client_banner(connection_out, 0); + client_banner_sent = 1; + } + /* Read other side's version identification. */ remaining = timeout_ms; for (n = 0;;) { @@ -649,7 +770,7 @@ ssh_exchange_identification(int timeout_ms) debug("ssh_exchange_identification: %s", buf); } server_version_string = xstrdup(buf); - xfree(fdset); + free(fdset); /* * Check that the versions match. In future this might accept @@ -661,7 +782,7 @@ ssh_exchange_identification(int timeout_ms) debug("Remote protocol version %d.%d, remote software version %.100s", remote_major, remote_minor, remote_version); - compat_datafellows(remote_version); + active_state->compat = compat_datafellows(remote_version); mismatch = 0; switch (remote_major) { @@ -702,18 +823,15 @@ ssh_exchange_identification(int timeout_ms) fatal("Protocol major versions differ: %d vs. %d", (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1, remote_major); - /* Send our own protocol version identification. */ - snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s%s", - compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1, - compat20 ? PROTOCOL_MINOR_2 : minor1, - SSH_VERSION, compat20 ? "\r\n" : "\n"); - if (roaming_atomicio(vwrite, connection_out, buf, strlen(buf)) - != strlen(buf)) - fatal("write: %.100s", strerror(errno)); - client_version_string = xstrdup(buf); - chop(client_version_string); + if ((datafellows & SSH_BUG_DERIVEKEY) != 0) + fatal("Server version \"%.100s\" uses unsafe key agreement; " + "refusing connection", remote_version); + if ((datafellows & SSH_BUG_RSASIGMD5) != 0) + logit("Server version \"%.100s\" uses unsafe RSA signature " + "scheme; disabling use of RSA keys", remote_version); + if (!client_banner_sent) + send_client_banner(connection_out, minor1); chop(server_version_string); - debug("Local version string %.100s", client_version_string); } /* defaults to 'no' */ @@ -734,8 +852,7 @@ confirm(const char *prompt) ret = 0; if (p && strncasecmp(p, "yes", 3) == 0) ret = 1; - if (p) - xfree(p); + free(p); if (ret != -1) return ret; } @@ -750,7 +867,7 @@ check_host_cert(const char *host, const Key *host_key) error("%s", reason); return 0; } - if (buffer_len(&host_key->cert->critical) != 0) { + if (buffer_len(host_key->cert->critical) != 0) { error("Certificate for %s contains unsupported " "critical options(s)", host); return 0; @@ -807,7 +924,7 @@ get_hostfile_hostname_ipaddr(char *hostname, struct sockaddr *hostaddr, if (options.proxy_command == NULL) { if (getnameinfo(hostaddr, addrlen, ntop, sizeof(ntop), NULL, 0, NI_NUMERICHOST) != 0) - fatal("check_host_key: getnameinfo failed"); + fatal("%s: getnameinfo failed", __func__); *hostfile_ipaddr = put_host_port(ntop, port); } else { *hostfile_ipaddr = xstrdup("pw_name); @@ -1309,9 +1494,7 @@ ssh_login(Sensitive *sensitive, const char *orighost, /* Convert the user-supplied hostname into all lowercase. */ host = xstrdup(orighost); - for (cp = host; *cp; cp++) - if (isupper(*cp)) - *cp = (char)tolower(*cp); + lowercase(host); /* Exchange protocol version identification strings with the server. */ ssh_exchange_identification(timeout_ms); @@ -1321,14 +1504,19 @@ ssh_login(Sensitive *sensitive, const char *orighost, /* key exchange */ /* authenticate user */ + debug("Authenticating to %s:%d as '%s'", host, port, server_user); if (compat20) { ssh_kex2(host, hostaddr, port); ssh_userauth2(local_user, server_user, host, sensitive); } else { +#ifdef WITH_SSH1 ssh_kex(host, hostaddr); ssh_userauth1(local_user, server_user, host, sensitive); +#else + fatal("ssh1 is not supported"); +#endif } - xfree(local_user); + free(local_user); } void @@ -1345,15 +1533,22 @@ ssh_put_password(char *password) padded = xcalloc(1, size); strlcpy(padded, password, size); packet_put_string(padded, size); - memset(padded, 0, size); - xfree(padded); + explicit_bzero(padded, size); + free(padded); } /* print all known host keys for a given host, but skip keys of given type */ static int show_other_keys(struct hostkeys *hostkeys, Key *key) { - int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, KEY_ECDSA, -1}; + int type[] = { + KEY_RSA1, + KEY_RSA, + KEY_DSA, + KEY_ECDSA, + KEY_ED25519, + -1 + }; int i, ret = 0; char *fp, *ra; const struct hostkey_entry *found; @@ -1363,8 +1558,12 @@ show_other_keys(struct hostkeys *hostkeys, Key *key) continue; if (!lookup_key_in_hostkeys_by_type(hostkeys, type[i], &found)) continue; - fp = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_HEX); - ra = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_RANDOMART); + fp = sshkey_fingerprint(found->key, + options.fingerprint_hash, SSH_FP_DEFAULT); + ra = sshkey_fingerprint(found->key, + options.fingerprint_hash, SSH_FP_RANDOMART); + if (fp == NULL || ra == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); logit("WARNING: %s key found for host %s\n" "in %s:%lu\n" "%s key fingerprint %s.", @@ -1373,8 +1572,8 @@ show_other_keys(struct hostkeys *hostkeys, Key *key) key_type(found->key), fp); if (options.visual_host_key) logit("%s", ra); - xfree(ra); - xfree(fp); + free(ra); + free(fp); ret = 1; } return ret; @@ -1385,7 +1584,10 @@ warn_changed_key(Key *host_key) { char *fp; - fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX); + fp = sshkey_fingerprint(host_key, options.fingerprint_hash, + SSH_FP_DEFAULT); + if (fp == NULL) + fatal("%s: sshkey_fingerprint fail", __func__); error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @"); @@ -1397,7 +1599,7 @@ warn_changed_key(Key *host_key) key_type(host_key), fp); error("Please contact your system administrator."); - xfree(fp); + free(fp); } /* diff --git a/sshconnect.h b/sshconnect.h index fd7f7f7..0ea6e99 100644 --- a/sshconnect.h +++ b/sshconnect.h @@ -1,4 +1,4 @@ -/* $OpenBSD: sshconnect.h,v 1.27 2010/11/29 23:45:51 djm Exp $ */ +/* $OpenBSD: sshconnect.h,v 1.28 2013/10/16 02:31:47 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. @@ -31,9 +31,9 @@ struct Sensitive { int external_keysign; }; -int -ssh_connect(const char *, struct sockaddr_storage *, u_short, int, int, - int *, int, int, const char *); +struct addrinfo; +int ssh_connect(const char *, struct addrinfo *, struct sockaddr_storage *, + u_short, int, int, int *, int, int); void ssh_kill_proxy_command(void); void ssh_login(Sensitive *, const char *, struct sockaddr *, u_short, diff --git a/sshconnect1.c b/sshconnect1.c index fd07bbf..016abbc 100644 --- a/sshconnect1.c +++ b/sshconnect1.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshconnect1.c,v 1.70 2006/11/06 21:25:28 markus Exp $ */ +/* $OpenBSD: sshconnect1.c,v 1.77 2015/01/14 20:05:27 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -15,12 +15,14 @@ #include "includes.h" +#ifdef WITH_SSH1 + #include #include #include -#include +#include #include #include #include @@ -39,14 +41,16 @@ #include "kex.h" #include "uidswap.h" #include "log.h" +#include "misc.h" #include "readconf.h" #include "authfd.h" #include "sshconnect.h" #include "authfile.h" -#include "misc.h" #include "canohost.h" #include "hostfile.h" #include "auth.h" +#include "digest.h" +#include "ssherr.h" /* Session id for the current session. */ u_char session_id[16]; @@ -62,33 +66,38 @@ extern char *__progname; static int try_agent_authentication(void) { - int type; - char *comment; - AuthenticationConnection *auth; + int r, type, agent_fd, ret = 0; u_char response[16]; - u_int i; - Key *key; + size_t i; BIGNUM *challenge; + struct ssh_identitylist *idlist = NULL; /* Get connection to the agent. */ - auth = ssh_get_authentication_connection(); - if (!auth) + if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) { + if (r != SSH_ERR_AGENT_NOT_PRESENT) + debug("%s: ssh_get_authentication_socket: %s", + __func__, ssh_err(r)); return 0; + } if ((challenge = BN_new()) == NULL) fatal("try_agent_authentication: BN_new failed"); - /* Loop through identities served by the agent. */ - for (key = ssh_get_first_identity(auth, &comment, 1); - key != NULL; - key = ssh_get_next_identity(auth, &comment, 1)) { + /* Loop through identities served by the agent. */ + if ((r = ssh_fetch_identitylist(agent_fd, 1, &idlist)) != 0) { + if (r != SSH_ERR_AGENT_NO_IDENTITIES) + debug("%s: ssh_fetch_identitylist: %s", + __func__, ssh_err(r)); + goto out; + } + for (i = 0; i < idlist->nkeys; i++) { /* Try this identity. */ - debug("Trying RSA authentication via agent with '%.100s'", comment); - xfree(comment); + debug("Trying RSA authentication via agent with '%.100s'", + idlist->comments[i]); /* Tell the server that we are willing to authenticate using this key. */ packet_start(SSH_CMSG_AUTH_RSA); - packet_put_bignum(key->rsa->n); + packet_put_bignum(idlist->keys[i]->rsa->n); packet_send(); packet_write_wait(); @@ -99,7 +108,6 @@ try_agent_authentication(void) does not support RSA authentication. */ if (type == SSH_SMSG_FAILURE) { debug("Server refused our key."); - key_free(key); continue; } /* Otherwise it should have sent a challenge. */ @@ -113,16 +121,17 @@ try_agent_authentication(void) debug("Received RSA challenge from server."); /* Ask the agent to decrypt the challenge. */ - if (!ssh_decrypt_challenge(auth, key, challenge, session_id, 1, response)) { + if ((r = ssh_decrypt_challenge(agent_fd, idlist->keys[i], + challenge, session_id, response)) != 0) { /* * The agent failed to authenticate this identifier * although it advertised it supports this. Just * return a wrong value. */ - logit("Authentication agent failed to decrypt challenge."); - memset(response, 0, sizeof(response)); + logit("Authentication agent failed to decrypt " + "challenge: %s", ssh_err(r)); + explicit_bzero(response, sizeof(response)); } - key_free(key); debug("Sending response to RSA challenge."); /* Send the decrypted challenge back to the server. */ @@ -135,22 +144,25 @@ try_agent_authentication(void) /* Wait for response from the server. */ type = packet_read(); - /* The server returns success if it accepted the authentication. */ + /* + * The server returns success if it accepted the + * authentication. + */ if (type == SSH_SMSG_SUCCESS) { - ssh_close_authentication_connection(auth); - BN_clear_free(challenge); debug("RSA authentication accepted by server."); - return 1; - } - /* Otherwise it should return failure. */ - if (type != SSH_SMSG_FAILURE) - packet_disconnect("Protocol error waiting RSA auth response: %d", - type); + ret = 1; + break; + } else if (type != SSH_SMSG_FAILURE) + packet_disconnect("Protocol error waiting RSA auth " + "response: %d", type); } - ssh_close_authentication_connection(auth); + if (ret != 1) + debug("RSA authentication using agent refused."); + out: + ssh_free_identitylist(idlist); + ssh_close_authentication_socket(agent_fd); BN_clear_free(challenge); - debug("RSA authentication using agent refused."); - return 0; + return ret; } /* @@ -161,12 +173,12 @@ static void respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv) { u_char buf[32], response[16]; - MD5_CTX md; + struct ssh_digest_ctx *md; int i, len; /* Decrypt the challenge using the private key. */ /* XXX think about Bleichenbacher, too */ - if (rsa_private_decrypt(challenge, challenge, prv) <= 0) + if (rsa_private_decrypt(challenge, challenge, prv) != 0) packet_disconnect( "respond_to_rsa_challenge: rsa_private_decrypt failed"); @@ -179,10 +191,12 @@ respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv) memset(buf, 0, sizeof(buf)); BN_bn2bin(challenge, buf + sizeof(buf) - len); - MD5_Init(&md); - MD5_Update(&md, buf, 32); - MD5_Update(&md, session_id, 16); - MD5_Final(response, &md); + if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL || + ssh_digest_update(md, buf, 32) < 0 || + ssh_digest_update(md, session_id, 16) < 0 || + ssh_digest_final(md, response, sizeof(response)) < 0) + fatal("%s: md5 failed", __func__); + ssh_digest_free(md); debug("Sending response to host key RSA challenge."); @@ -193,9 +207,9 @@ respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv) packet_send(); packet_write_wait(); - memset(buf, 0, sizeof(buf)); - memset(response, 0, sizeof(response)); - memset(&md, 0, sizeof(md)); + explicit_bzero(buf, sizeof(buf)); + explicit_bzero(response, sizeof(response)); + explicit_bzero(&md, sizeof(md)); } /* @@ -231,7 +245,7 @@ try_rsa_authentication(int idx) */ if (type == SSH_SMSG_FAILURE) { debug("Server refused our key."); - xfree(comment); + free(comment); return 0; } /* Otherwise, the server should respond with a challenge. */ @@ -251,7 +265,7 @@ try_rsa_authentication(int idx) * load the private key. Try first with empty passphrase; if it * fails, ask for a passphrase. */ - if (public->flags & KEY_FLAG_EXT) + if (public->flags & SSHKEY_FLAG_EXT) private = public; else private = key_load_private_type(KEY_RSA1, authfile, "", NULL, @@ -269,15 +283,15 @@ try_rsa_authentication(int idx) debug2("no passphrase given, try next key"); quit = 1; } - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); + explicit_bzero(passphrase, strlen(passphrase)); + free(passphrase); if (private != NULL || quit) break; debug2("bad passphrase given, try again..."); } } /* We no longer need the comment. */ - xfree(comment); + free(comment); if (private == NULL) { if (!options.batch_mode && perm_ok) @@ -300,7 +314,7 @@ try_rsa_authentication(int idx) respond_to_rsa_challenge(challenge, private->rsa); /* Destroy the private key unless it in external hardware. */ - if (!(private->flags & KEY_FLAG_EXT)) + if (!(private->flags & SSHKEY_FLAG_EXT)) key_free(private); /* We no longer need the challenge. */ @@ -412,7 +426,7 @@ try_challenge_response_authentication(void) packet_check_eom(); snprintf(prompt, sizeof prompt, "%s%s", challenge, strchr(challenge, '\n') ? "" : "\nResponse: "); - xfree(challenge); + free(challenge); if (i != 0) error("Permission denied, please try again."); if (options.cipher == SSH_CIPHER_NONE) @@ -420,13 +434,13 @@ try_challenge_response_authentication(void) "Response will be transmitted in clear text."); response = read_passphrase(prompt, 0); if (strcmp(response, "") == 0) { - xfree(response); + free(response); break; } packet_start(SSH_CMSG_AUTH_TIS_RESPONSE); ssh_put_password(response); - memset(response, 0, strlen(response)); - xfree(response); + explicit_bzero(response, strlen(response)); + free(response); packet_send(); packet_write_wait(); type = packet_read(); @@ -458,8 +472,8 @@ try_password_authentication(char *prompt) password = read_passphrase(prompt, 0); packet_start(SSH_CMSG_AUTH_PASSWORD); ssh_put_password(password); - memset(password, 0, strlen(password)); - xfree(password); + explicit_bzero(password, strlen(password)); + free(password); packet_send(); packet_write_wait(); @@ -542,9 +556,6 @@ ssh_kex(char *host, struct sockaddr *hostaddr) derive_ssh1_session_id(host_key->rsa->n, server_key->rsa->n, cookie, session_id); - /* Generate a session key. */ - arc4random_stir(); - /* * Generate an encryption key for the session. The key is a 256 bit * random number, interpreted as a 32-byte key, with the least @@ -593,8 +604,9 @@ ssh_kex(char *host, struct sockaddr *hostaddr) BN_num_bits(server_key->rsa->n), SSH_KEY_BITS_RESERVED); } - rsa_public_encrypt(key, key, server_key->rsa); - rsa_public_encrypt(key, key, host_key->rsa); + if (rsa_public_encrypt(key, key, server_key->rsa) != 0 || + rsa_public_encrypt(key, key, host_key->rsa) != 0) + fatal("%s: rsa_public_encrypt failed", __func__); } else { /* Host key has smaller modulus (or they are equal). */ if (BN_num_bits(server_key->rsa->n) < @@ -605,8 +617,9 @@ ssh_kex(char *host, struct sockaddr *hostaddr) BN_num_bits(host_key->rsa->n), SSH_KEY_BITS_RESERVED); } - rsa_public_encrypt(key, key, host_key->rsa); - rsa_public_encrypt(key, key, server_key->rsa); + if (rsa_public_encrypt(key, key, host_key->rsa) != 0 || + rsa_public_encrypt(key, key, server_key->rsa) != 0) + fatal("%s: rsa_public_encrypt failed", __func__); } /* Destroy the public keys since we no longer need them. */ @@ -653,8 +666,11 @@ ssh_kex(char *host, struct sockaddr *hostaddr) /* Set the encryption key. */ packet_set_encryption_key(session_key, SSH_SESSION_KEY_LENGTH, options.cipher); - /* We will no longer need the session key here. Destroy any extra copies. */ - memset(session_key, 0, sizeof(session_key)); + /* + * We will no longer need the session key here. + * Destroy any extra copies. + */ + explicit_bzero(session_key, sizeof(session_key)); /* * Expect a success message from the server. Note that this message @@ -751,3 +767,5 @@ ssh_userauth1(const char *local_user, const char *server_user, char *host, success: return; /* need statement after label */ } + +#endif /* WITH_SSH1 */ diff --git a/sshconnect2.c b/sshconnect2.c index 2d0d102..8cf3302 100644 --- a/sshconnect2.c +++ b/sshconnect2.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshconnect2.c,v 1.188 2011/05/24 07:15:47 djm Exp $ */ +/* $OpenBSD: sshconnect2.c,v 1.226 2015/07/30 00:01:34 djm Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2008 Damien Miller. All rights reserved. @@ -40,7 +40,7 @@ #include #include #include -#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) +#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) #include #endif @@ -61,8 +61,8 @@ #include "dh.h" #include "authfd.h" #include "log.h" -#include "readconf.h" #include "misc.h" +#include "readconf.h" #include "match.h" #include "dispatch.h" #include "canohost.h" @@ -70,8 +70,7 @@ #include "pathnames.h" #include "uidswap.h" #include "hostfile.h" -#include "schnorr.h" -#include "jpake.h" +#include "ssherr.h" #ifdef GSSAPI #include "ssh-gss.h" @@ -92,10 +91,8 @@ u_int session_id2_len = 0; char *xxx_host; struct sockaddr *xxx_hostaddr; -Kex *xxx_kex = NULL; - static int -verify_host_key_callback(Key *hostkey) +verify_host_key_callback(Key *hostkey, struct ssh *ssh) { if (verify_host_key(xxx_host, xxx_hostaddr, hostkey) == -1) fatal("Host key verification failed."); @@ -133,23 +130,24 @@ order_hostkeyalgs(char *host, struct sockaddr *hostaddr, u_short port) } while (0) while ((alg = strsep(&avail, ",")) && *alg != '\0') { - if ((ktype = key_type_from_name(alg)) == KEY_UNSPEC) + if ((ktype = sshkey_type_from_name(alg)) == KEY_UNSPEC) fatal("%s: unknown alg %s", __func__, alg); if (lookup_key_in_hostkeys_by_type(hostkeys, - key_type_plain(ktype), NULL)) + sshkey_type_plain(ktype), NULL)) ALG_APPEND(first, alg); else ALG_APPEND(last, alg); } #undef ALG_APPEND - xasprintf(&ret, "%s%s%s", first, *first == '\0' ? "" : ",", last); + xasprintf(&ret, "%s%s%s", first, + (*first == '\0' || *last == '\0') ? "" : ",", last); if (*first != '\0') debug3("%s: prefer hostkeyalgs: %s", __func__, first); - xfree(first); - xfree(last); - xfree(hostname); - xfree(oavail); + free(first); + free(last); + free(hostname); + free(oavail); free_hostkeys(hostkeys); return ret; @@ -158,23 +156,19 @@ order_hostkeyalgs(char *host, struct sockaddr *hostaddr, u_short port) void ssh_kex2(char *host, struct sockaddr *hostaddr, u_short port) { - Kex *kex; + char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT }; + struct kex *kex; + int r; xxx_host = host; xxx_hostaddr = hostaddr; - if (options.ciphers == (char *)-1) { - logit("No valid ciphers for protocol version 2 given, using defaults."); - options.ciphers = NULL; - } - if (options.ciphers != NULL) { - myproposal[PROPOSAL_ENC_ALGS_CTOS] = - myproposal[PROPOSAL_ENC_ALGS_STOC] = options.ciphers; - } + myproposal[PROPOSAL_KEX_ALGS] = compat_kex_proposal( + options.kex_algorithms); myproposal[PROPOSAL_ENC_ALGS_CTOS] = - compat_cipher_proposal(myproposal[PROPOSAL_ENC_ALGS_CTOS]); + compat_cipher_proposal(options.ciphers); myproposal[PROPOSAL_ENC_ALGS_STOC] = - compat_cipher_proposal(myproposal[PROPOSAL_ENC_ALGS_STOC]); + compat_cipher_proposal(options.ciphers); if (options.compression) { myproposal[PROPOSAL_COMP_ALGS_CTOS] = myproposal[PROPOSAL_COMP_ALGS_STOC] = "zlib@openssh.com,zlib,none"; @@ -182,38 +176,46 @@ ssh_kex2(char *host, struct sockaddr *hostaddr, u_short port) myproposal[PROPOSAL_COMP_ALGS_CTOS] = myproposal[PROPOSAL_COMP_ALGS_STOC] = "none,zlib@openssh.com,zlib"; } - if (options.macs != NULL) { - myproposal[PROPOSAL_MAC_ALGS_CTOS] = - myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; - } - if (options.hostkeyalgorithms != NULL) + myproposal[PROPOSAL_MAC_ALGS_CTOS] = + myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; + if (options.hostkeyalgorithms != NULL) { + if (kex_assemble_names(KEX_DEFAULT_PK_ALG, + &options.hostkeyalgorithms) != 0) + fatal("%s: kex_assemble_namelist", __func__); myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = - options.hostkeyalgorithms; - else { + compat_pkalg_proposal(options.hostkeyalgorithms); + } else { + /* Enforce default */ + options.hostkeyalgorithms = xstrdup(KEX_DEFAULT_PK_ALG); /* Prefer algorithms that we already have keys for */ myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = - order_hostkeyalgs(host, hostaddr, port); + compat_pkalg_proposal( + order_hostkeyalgs(host, hostaddr, port)); } - if (options.kex_algorithms != NULL) - myproposal[PROPOSAL_KEX_ALGS] = options.kex_algorithms; - if (options.rekey_limit) - packet_set_rekey_limit((u_int32_t)options.rekey_limit); + if (options.rekey_limit || options.rekey_interval) + packet_set_rekey_limits((u_int32_t)options.rekey_limit, + (time_t)options.rekey_interval); /* start key exchange */ - kex = kex_setup(myproposal); + if ((r = kex_setup(active_state, myproposal)) != 0) + fatal("kex_setup: %s", ssh_err(r)); + kex = active_state->kex; +#ifdef WITH_OPENSSL kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client; kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client; kex->kex[KEX_DH_GEX_SHA1] = kexgex_client; kex->kex[KEX_DH_GEX_SHA256] = kexgex_client; +# ifdef OPENSSL_HAS_ECC kex->kex[KEX_ECDH_SHA2] = kexecdh_client; +# endif +#endif + kex->kex[KEX_C25519_SHA256] = kexc25519_client; kex->client_version_string=client_version_string; kex->server_version_string=server_version_string; kex->verify_host_key=&verify_host_key_callback; - xxx_kex = kex; - - dispatch_run(DISPATCH_BLOCK, &kex->done, kex); + dispatch_run(DISPATCH_BLOCK, &kex->done, active_state); if (options.use_roaming && !kex->roaming) { debug("Roaming not allowed by server"); @@ -236,40 +238,45 @@ ssh_kex2(char *host, struct sockaddr *hostaddr, u_short port) * Authenticate user */ -typedef struct Authctxt Authctxt; -typedef struct Authmethod Authmethod; +typedef struct cauthctxt Authctxt; +typedef struct cauthmethod Authmethod; typedef struct identity Identity; typedef struct idlist Idlist; struct identity { TAILQ_ENTRY(identity) next; - AuthenticationConnection *ac; /* set if agent supports key */ - Key *key; /* public/private key */ + int agent_fd; /* >=0 if agent supports key */ + struct sshkey *key; /* public/private key */ char *filename; /* comment for agent-only keys */ int tried; int isprivate; /* key points to the private key */ + int userprovided; }; TAILQ_HEAD(idlist, identity); -struct Authctxt { +struct cauthctxt { const char *server_user; const char *local_user; const char *host; const char *service; - Authmethod *method; + struct cauthmethod *method; sig_atomic_t success; char *authlist; + int attempt; /* pubkey */ - Idlist keys; - AuthenticationConnection *agent; + struct idlist keys; + int agent_fd; /* hostbased */ Sensitive *sensitive; + char *oktypes, *ktypes; + const char *active_ktype; /* kbd-interactive */ int info_req_seen; /* generic */ void *methoddata; }; -struct Authmethod { + +struct cauthmethod { char *name; /* string to compare against server's list */ int (*userauth)(Authctxt *authctxt); void (*cleanup)(Authctxt *authctxt); @@ -277,34 +284,28 @@ struct Authmethod { int *batch_flag; /* flag in option struct that disables method */ }; -void input_userauth_success(int, u_int32_t, void *); -void input_userauth_success_unexpected(int, u_int32_t, void *); -void input_userauth_failure(int, u_int32_t, void *); -void input_userauth_banner(int, u_int32_t, void *); -void input_userauth_error(int, u_int32_t, void *); -void input_userauth_info_req(int, u_int32_t, void *); -void input_userauth_pk_ok(int, u_int32_t, void *); -void input_userauth_passwd_changereq(int, u_int32_t, void *); -void input_userauth_jpake_server_step1(int, u_int32_t, void *); -void input_userauth_jpake_server_step2(int, u_int32_t, void *); -void input_userauth_jpake_server_confirm(int, u_int32_t, void *); +int input_userauth_success(int, u_int32_t, void *); +int input_userauth_success_unexpected(int, u_int32_t, void *); +int input_userauth_failure(int, u_int32_t, void *); +int input_userauth_banner(int, u_int32_t, void *); +int input_userauth_error(int, u_int32_t, void *); +int input_userauth_info_req(int, u_int32_t, void *); +int input_userauth_pk_ok(int, u_int32_t, void *); +int input_userauth_passwd_changereq(int, u_int32_t, void *); int userauth_none(Authctxt *); int userauth_pubkey(Authctxt *); int userauth_passwd(Authctxt *); int userauth_kbdint(Authctxt *); int userauth_hostbased(Authctxt *); -int userauth_jpake(Authctxt *); - -void userauth_jpake_cleanup(Authctxt *); #ifdef GSSAPI int userauth_gssapi(Authctxt *authctxt); -void input_gssapi_response(int type, u_int32_t, void *); -void input_gssapi_token(int type, u_int32_t, void *); -void input_gssapi_hash(int type, u_int32_t, void *); -void input_gssapi_error(int, u_int32_t, void *); -void input_gssapi_errtok(int, u_int32_t, void *); +int input_gssapi_response(int type, u_int32_t, void *); +int input_gssapi_token(int type, u_int32_t, void *); +int input_gssapi_hash(int type, u_int32_t, void *); +int input_gssapi_error(int, u_int32_t, void *); +int input_gssapi_errtok(int, u_int32_t, void *); #endif void userauth(Authctxt *, char *); @@ -312,7 +313,7 @@ void userauth(Authctxt *, char *); static int sign_and_send_pubkey(Authctxt *, Identity *); static void pubkey_prepare(Authctxt *); static void pubkey_cleanup(Authctxt *); -static Key *load_identity_file(char *); +static Key *load_identity_file(char *, int); static Authmethod *authmethod_get(char *authlist); static Authmethod *authmethod_lookup(const char *name); @@ -346,13 +347,6 @@ Authmethod authmethods[] = { NULL, &options.pubkey_authentication, NULL}, -#ifdef JPAKE - {"jpake-01@openssh.com", - userauth_jpake, - userauth_jpake_cleanup, - &options.zero_knowledge_password_authentication, - &options.batch_mode}, -#endif {"keyboard-interactive", userauth_kbdint, NULL, @@ -392,7 +386,7 @@ ssh_userauth2(const char *local_user, const char *server_user, char *host, if (packet_remaining() > 0) { char *reply = packet_get_string(NULL); debug2("service_accept: %s", reply); - xfree(reply); + free(reply); } else { debug2("buggy server: service_accept w/o service"); } @@ -414,7 +408,9 @@ ssh_userauth2(const char *local_user, const char *server_user, char *host, authctxt.authlist = NULL; authctxt.methoddata = NULL; authctxt.sensitive = sensitive; + authctxt.active_ktype = authctxt.oktypes = authctxt.ktypes = NULL; authctxt.info_req_seen = 0; + authctxt.agent_fd = -1; if (authctxt.method == NULL) fatal("ssh_userauth2: internal error: cannot send userauth none request"); @@ -439,15 +435,12 @@ userauth(Authctxt *authctxt, char *authlist) if (authctxt->method != NULL && authctxt->method->cleanup != NULL) authctxt->method->cleanup(authctxt); - if (authctxt->methoddata) { - xfree(authctxt->methoddata); - authctxt->methoddata = NULL; - } + free(authctxt->methoddata); + authctxt->methoddata = NULL; if (authlist == NULL) { authlist = authctxt->authlist; } else { - if (authctxt->authlist) - xfree(authctxt->authlist); + free(authctxt->authlist); authctxt->authlist = authlist; } for (;;) { @@ -472,15 +465,16 @@ userauth(Authctxt *authctxt, char *authlist) } /* ARGSUSED */ -void +int input_userauth_error(int type, u_int32_t seq, void *ctxt) { fatal("input_userauth_error: bad message during authentication: " "type %d", type); + return 0; } /* ARGSUSED */ -void +int input_userauth_banner(int type, u_int32_t seq, void *ctxt) { char *msg, *raw, *lang; @@ -495,34 +489,32 @@ input_userauth_banner(int type, u_int32_t seq, void *ctxt) msg = xmalloc(len * 4 + 1); /* max expansion from strnvis() */ strnvis(msg, raw, len * 4 + 1, VIS_SAFE|VIS_OCTAL|VIS_NOSLASH); fprintf(stderr, "%s", msg); - xfree(msg); + free(msg); } - xfree(raw); - xfree(lang); + free(raw); + free(lang); + return 0; } /* ARGSUSED */ -void +int input_userauth_success(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; if (authctxt == NULL) fatal("input_userauth_success: no authentication context"); - if (authctxt->authlist) { - xfree(authctxt->authlist); - authctxt->authlist = NULL; - } + free(authctxt->authlist); + authctxt->authlist = NULL; if (authctxt->method != NULL && authctxt->method->cleanup != NULL) authctxt->method->cleanup(authctxt); - if (authctxt->methoddata) { - xfree(authctxt->methoddata); - authctxt->methoddata = NULL; - } + free(authctxt->methoddata); + authctxt->methoddata = NULL; authctxt->success = 1; /* break out */ + return 0; } -void +int input_userauth_success_unexpected(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -532,10 +524,11 @@ input_userauth_success_unexpected(int type, u_int32_t seq, void *ctxt) fatal("Unexpected authentication success during %s.", authctxt->method->name); + return 0; } /* ARGSUSED */ -void +int input_userauth_failure(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -549,15 +542,20 @@ input_userauth_failure(int type, u_int32_t seq, void *ctxt) partial = packet_get_char(); packet_check_eom(); - if (partial != 0) + if (partial != 0) { logit("Authenticated with partial success."); + /* reset state */ + pubkey_cleanup(authctxt); + pubkey_prepare(authctxt); + } debug("Authentications that can continue: %s", authlist); userauth(authctxt, authlist); + return 0; } /* ARGSUSED */ -void +int input_userauth_pk_ok(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -601,9 +599,11 @@ input_userauth_pk_ok(int type, u_int32_t seq, void *ctxt) key->type, pktype); goto done; } - fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); + if ((fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) + goto done; debug2("input_userauth_pk_ok: fp %s", fp); - xfree(fp); + free(fp); /* * search keys in the reverse order, because last candidate has been @@ -619,12 +619,13 @@ input_userauth_pk_ok(int type, u_int32_t seq, void *ctxt) done: if (key != NULL) key_free(key); - xfree(pkalg); - xfree(pkblob); + free(pkalg); + free(pkblob); /* try another method if we did not send a packet */ if (sent == 0) userauth(authctxt, NULL); + return 0; } #ifdef GSSAPI @@ -636,6 +637,7 @@ userauth_gssapi(Authctxt *authctxt) static u_int mech = 0; OM_uint32 min; int ok = 0; + #ifdef WIN32_FIXME /* @@ -761,7 +763,7 @@ process_gssapi_token(void *ctxt, gss_buffer_t recv_tok) } /* ARGSUSED */ -void +int input_gssapi_response(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; @@ -779,10 +781,10 @@ input_gssapi_response(int type, u_int32_t plen, void *ctxt) if (oidlen <= 2 || oidv[0] != SSH_GSS_OIDTYPE || oidv[1] != oidlen - 2) { - xfree(oidv); + free(oidv); debug("Badly encoded mechanism OID received"); userauth(authctxt, NULL); - return; + return 0; } if (!ssh_gssapi_check_oid(gssctxt, oidv + 2, oidlen - 2)) @@ -790,18 +792,19 @@ input_gssapi_response(int type, u_int32_t plen, void *ctxt) packet_check_eom(); - xfree(oidv); + free(oidv); if (GSS_ERROR(process_gssapi_token(ctxt, GSS_C_NO_BUFFER))) { /* Start again with next method on list */ debug("Trying to start again"); userauth(authctxt, NULL); - return; + return 0; } + return 0; } /* ARGSUSED */ -void +int input_gssapi_token(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; @@ -819,24 +822,25 @@ input_gssapi_token(int type, u_int32_t plen, void *ctxt) status = process_gssapi_token(ctxt, &recv_tok); - xfree(recv_tok.value); + free(recv_tok.value); if (GSS_ERROR(status)) { /* Start again with the next method in the list */ userauth(authctxt, NULL); - return; + return 0; } + return 0; } /* ARGSUSED */ -void +int input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) { Authctxt *authctxt = ctxt; Gssctxt *gssctxt; gss_buffer_desc send_tok = GSS_C_EMPTY_BUFFER; gss_buffer_desc recv_tok; - OM_uint32 status, ms; + OM_uint32 ms; u_int len; if (authctxt == NULL) @@ -849,33 +853,34 @@ input_gssapi_errtok(int type, u_int32_t plen, void *ctxt) packet_check_eom(); /* Stick it into GSSAPI and see what it says */ - status = ssh_gssapi_init_ctx(gssctxt, options.gss_deleg_creds, + (void)ssh_gssapi_init_ctx(gssctxt, options.gss_deleg_creds, &recv_tok, &send_tok, NULL); - xfree(recv_tok.value); + free(recv_tok.value); gss_release_buffer(&ms, &send_tok); /* Server will be returning a failed packet after this one */ + return 0; } /* ARGSUSED */ -void +int input_gssapi_error(int type, u_int32_t plen, void *ctxt) { - OM_uint32 maj, min; char *msg; char *lang; - maj=packet_get_int(); - min=packet_get_int(); + /* maj */(void)packet_get_int(); + /* min */(void)packet_get_int(); msg=packet_get_string(NULL); lang=packet_get_string(NULL); packet_check_eom(); debug("Server GSSAPI Error:\n%s", msg); - xfree(msg); - xfree(lang); + free(msg); + free(lang); + return 0; } #endif /* GSSAPI */ @@ -915,8 +920,8 @@ userauth_passwd(Authctxt *authctxt) packet_put_cstring(authctxt->method->name); packet_put_char(0); packet_put_cstring(password); - memset(password, 0, strlen(password)); - xfree(password); + explicit_bzero(password, strlen(password)); + free(password); packet_add_padding(64); packet_send(); @@ -930,7 +935,7 @@ userauth_passwd(Authctxt *authctxt) * parse PASSWD_CHANGEREQ, prompt user and send SSH2_MSG_USERAUTH_REQUEST */ /* ARGSUSED */ -void +int input_userauth_passwd_changereq(int type, u_int32_t seqnr, void *ctxt) { Authctxt *authctxt = ctxt; @@ -949,8 +954,8 @@ input_userauth_passwd_changereq(int type, u_int32_t seqnr, void *ctxt) lang = packet_get_string(NULL); if (strlen(info) > 0) logit("%s", info); - xfree(info); - xfree(lang); + free(info); + free(lang); packet_start(SSH2_MSG_USERAUTH_REQUEST); packet_put_cstring(authctxt->server_user); packet_put_cstring(authctxt->service); @@ -961,8 +966,8 @@ input_userauth_passwd_changereq(int type, u_int32_t seqnr, void *ctxt) authctxt->server_user, host); password = read_passphrase(prompt, 0); packet_put_cstring(password); - memset(password, 0, strlen(password)); - xfree(password); + explicit_bzero(password, strlen(password)); + free(password); password = NULL; while (password == NULL) { snprintf(prompt, sizeof(prompt), @@ -971,256 +976,56 @@ input_userauth_passwd_changereq(int type, u_int32_t seqnr, void *ctxt) password = read_passphrase(prompt, RP_ALLOW_EOF); if (password == NULL) { /* bail out */ - return; + return 0; } snprintf(prompt, sizeof(prompt), "Retype %.30s@%.128s's new password: ", authctxt->server_user, host); retype = read_passphrase(prompt, 0); if (strcmp(password, retype) != 0) { - memset(password, 0, strlen(password)); - xfree(password); + explicit_bzero(password, strlen(password)); + free(password); logit("Mismatch; try again, EOF to quit."); password = NULL; } - memset(retype, 0, strlen(retype)); - xfree(retype); + explicit_bzero(retype, strlen(retype)); + free(retype); } packet_put_cstring(password); - memset(password, 0, strlen(password)); - xfree(password); + explicit_bzero(password, strlen(password)); + free(password); packet_add_padding(64); packet_send(); dispatch_set(SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ, &input_userauth_passwd_changereq); + return 0; } -#ifdef JPAKE -static char * -pw_encrypt(const char *password, const char *crypt_scheme, const char *salt) -{ - /* OpenBSD crypt(3) handles all of these */ - if (strcmp(crypt_scheme, "crypt") == 0 || - strcmp(crypt_scheme, "bcrypt") == 0 || - strcmp(crypt_scheme, "md5crypt") == 0 || - strcmp(crypt_scheme, "crypt-extended") == 0) - return xstrdup(crypt(password, salt)); - error("%s: unsupported password encryption scheme \"%.100s\"", - __func__, crypt_scheme); - return NULL; -} - -static BIGNUM * -jpake_password_to_secret(Authctxt *authctxt, const char *crypt_scheme, - const char *salt) -{ - char prompt[256], *password, *crypted; - u_char *secret; - u_int secret_len; - BIGNUM *ret; - - snprintf(prompt, sizeof(prompt), "%.30s@%.128s's password (JPAKE): ", - authctxt->server_user, authctxt->host); - password = read_passphrase(prompt, 0); - - if ((crypted = pw_encrypt(password, crypt_scheme, salt)) == NULL) { - logit("Disabling %s authentication", authctxt->method->name); - authctxt->method->enabled = NULL; - /* Continue with an empty password to fail gracefully */ - crypted = xstrdup(""); - } - -#ifdef JPAKE_DEBUG - debug3("%s: salt = %s", __func__, salt); - debug3("%s: scheme = %s", __func__, crypt_scheme); - debug3("%s: crypted = %s", __func__, crypted); -#endif - - if (hash_buffer(crypted, strlen(crypted), EVP_sha256(), - &secret, &secret_len) != 0) - fatal("%s: hash_buffer", __func__); - - bzero(password, strlen(password)); - bzero(crypted, strlen(crypted)); - xfree(password); - xfree(crypted); - - if ((ret = BN_bin2bn(secret, secret_len, NULL)) == NULL) - fatal("%s: BN_bin2bn (secret)", __func__); - bzero(secret, secret_len); - xfree(secret); - - return ret; -} - -/* ARGSUSED */ -void -input_userauth_jpake_server_step1(int type, u_int32_t seq, void *ctxt) -{ - Authctxt *authctxt = ctxt; - struct jpake_ctx *pctx = authctxt->methoddata; - u_char *x3_proof, *x4_proof, *x2_s_proof; - u_int x3_proof_len, x4_proof_len, x2_s_proof_len; - char *crypt_scheme, *salt; - - /* Disable this message */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_STEP1, NULL); - - if ((pctx->g_x3 = BN_new()) == NULL || - (pctx->g_x4 = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - - /* Fetch step 1 values */ - crypt_scheme = packet_get_string(NULL); - salt = packet_get_string(NULL); - pctx->server_id = packet_get_string(&pctx->server_id_len); - packet_get_bignum2(pctx->g_x3); - packet_get_bignum2(pctx->g_x4); - x3_proof = packet_get_string(&x3_proof_len); - x4_proof = packet_get_string(&x4_proof_len); - packet_check_eom(); - - JPAKE_DEBUG_CTX((pctx, "step 1 received in %s", __func__)); - - /* Obtain password and derive secret */ - pctx->s = jpake_password_to_secret(authctxt, crypt_scheme, salt); - bzero(crypt_scheme, strlen(crypt_scheme)); - bzero(salt, strlen(salt)); - xfree(crypt_scheme); - xfree(salt); - JPAKE_DEBUG_BN((pctx->s, "%s: s = ", __func__)); - - /* Calculate step 2 values */ - jpake_step2(pctx->grp, pctx->s, pctx->g_x1, - pctx->g_x3, pctx->g_x4, pctx->x2, - pctx->server_id, pctx->server_id_len, - pctx->client_id, pctx->client_id_len, - x3_proof, x3_proof_len, - x4_proof, x4_proof_len, - &pctx->a, - &x2_s_proof, &x2_s_proof_len); - - bzero(x3_proof, x3_proof_len); - bzero(x4_proof, x4_proof_len); - xfree(x3_proof); - xfree(x4_proof); - - JPAKE_DEBUG_CTX((pctx, "step 2 sending in %s", __func__)); - - /* Send values for step 2 */ - packet_start(SSH2_MSG_USERAUTH_JPAKE_CLIENT_STEP2); - packet_put_bignum2(pctx->a); - packet_put_string(x2_s_proof, x2_s_proof_len); - packet_send(); - - bzero(x2_s_proof, x2_s_proof_len); - xfree(x2_s_proof); - - /* Expect step 2 packet from peer */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_STEP2, - input_userauth_jpake_server_step2); -} - -/* ARGSUSED */ -void -input_userauth_jpake_server_step2(int type, u_int32_t seq, void *ctxt) -{ - Authctxt *authctxt = ctxt; - struct jpake_ctx *pctx = authctxt->methoddata; - u_char *x4_s_proof; - u_int x4_s_proof_len; - - /* Disable this message */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_STEP2, NULL); - - if ((pctx->b = BN_new()) == NULL) - fatal("%s: BN_new", __func__); - - /* Fetch step 2 values */ - packet_get_bignum2(pctx->b); - x4_s_proof = packet_get_string(&x4_s_proof_len); - packet_check_eom(); - - JPAKE_DEBUG_CTX((pctx, "step 2 received in %s", __func__)); - - /* Derive shared key and calculate confirmation hash */ - jpake_key_confirm(pctx->grp, pctx->s, pctx->b, - pctx->x2, pctx->g_x1, pctx->g_x2, pctx->g_x3, pctx->g_x4, - pctx->client_id, pctx->client_id_len, - pctx->server_id, pctx->server_id_len, - session_id2, session_id2_len, - x4_s_proof, x4_s_proof_len, - &pctx->k, - &pctx->h_k_cid_sessid, &pctx->h_k_cid_sessid_len); - - bzero(x4_s_proof, x4_s_proof_len); - xfree(x4_s_proof); - - JPAKE_DEBUG_CTX((pctx, "confirm sending in %s", __func__)); - - /* Send key confirmation proof */ - packet_start(SSH2_MSG_USERAUTH_JPAKE_CLIENT_CONFIRM); - packet_put_string(pctx->h_k_cid_sessid, pctx->h_k_cid_sessid_len); - packet_send(); - - /* Expect confirmation from peer */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_CONFIRM, - input_userauth_jpake_server_confirm); -} - -/* ARGSUSED */ -void -input_userauth_jpake_server_confirm(int type, u_int32_t seq, void *ctxt) -{ - Authctxt *authctxt = ctxt; - struct jpake_ctx *pctx = authctxt->methoddata; - - /* Disable this message */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_CONFIRM, NULL); - - pctx->h_k_sid_sessid = packet_get_string(&pctx->h_k_sid_sessid_len); - packet_check_eom(); - - JPAKE_DEBUG_CTX((pctx, "confirm received in %s", __func__)); - - /* Verify expected confirmation hash */ - if (jpake_check_confirm(pctx->k, - pctx->server_id, pctx->server_id_len, - session_id2, session_id2_len, - pctx->h_k_sid_sessid, pctx->h_k_sid_sessid_len) == 1) - debug("%s: %s success", __func__, authctxt->method->name); - else { - debug("%s: confirmation mismatch", __func__); - /* XXX stash this so if auth succeeds then we can warn/kill */ - } - - userauth_jpake_cleanup(authctxt); -} -#endif /* JPAKE */ - static int -identity_sign(Identity *id, u_char **sigp, u_int *lenp, - u_char *data, u_int datalen) +identity_sign(struct identity *id, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) { Key *prv; int ret; /* the agent supports this key */ - if (id->ac) - return (ssh_agent_sign(id->ac, id->key, sigp, lenp, - data, datalen)); + if (id->agent_fd) + return ssh_agent_sign(id->agent_fd, id->key, sigp, lenp, + data, datalen, compat); + /* * we have already loaded the private key or * the private key is stored in external hardware */ - if (id->isprivate || (id->key->flags & KEY_FLAG_EXT)) - return (key_sign(id->key, sigp, lenp, data, datalen)); + if (id->isprivate || (id->key->flags & SSHKEY_FLAG_EXT)) + return (sshkey_sign(id->key, sigp, lenp, data, datalen, + compat)); /* load the private key from the file */ - if ((prv = load_identity_file(id->filename)) == NULL) - return (-1); - ret = key_sign(prv, sigp, lenp, data, datalen); - key_free(prv); + if ((prv = load_identity_file(id->filename, id->userprovided)) == NULL) + return (-1); /* XXX return decent error code */ + ret = sshkey_sign(prv, sigp, lenp, data, datalen, compat); + sshkey_free(prv); return (ret); } @@ -1229,15 +1034,18 @@ sign_and_send_pubkey(Authctxt *authctxt, Identity *id) { Buffer b; u_char *blob, *signature; - u_int bloblen, slen; + u_int bloblen; + size_t slen; u_int skip = 0; int ret = -1; int have_sig = 1; char *fp; - fp = key_fingerprint(id->key, SSH_FP_MD5, SSH_FP_HEX); + if ((fp = sshkey_fingerprint(id->key, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) + return 0; debug3("sign_and_send_pubkey: %s %s", key_type(id->key), fp); - xfree(fp); + free(fp); if (key_to_blob(id->key, &blob, &bloblen) == 0) { /* we cannot handle this key */ @@ -1270,9 +1078,9 @@ sign_and_send_pubkey(Authctxt *authctxt, Identity *id) /* generate signature */ ret = identity_sign(id, &signature, &slen, - buffer_ptr(&b), buffer_len(&b)); - if (ret == -1) { - xfree(blob); + buffer_ptr(&b), buffer_len(&b), datafellows); + if (ret != 0) { + free(blob); buffer_free(&b); return 0; } @@ -1292,11 +1100,11 @@ sign_and_send_pubkey(Authctxt *authctxt, Identity *id) buffer_put_cstring(&b, key_ssh_name(id->key)); buffer_put_string(&b, blob, bloblen); } - xfree(blob); + free(blob); /* append signature */ buffer_put_string(&b, signature, slen); - xfree(signature); + free(signature); /* skip session id and packet type */ if (buffer_len(&b) < skip + 1) @@ -1336,47 +1144,68 @@ send_pubkey_test(Authctxt *authctxt, Identity *id) if (!(datafellows & SSH_BUG_PKAUTH)) packet_put_cstring(key_ssh_name(id->key)); packet_put_string(blob, bloblen); - xfree(blob); + free(blob); packet_send(); return 1; } static Key * -load_identity_file(char *filename) +load_identity_file(char *filename, int userprovided) { Key *private; char prompt[300], *passphrase; - int perm_ok = 0, quit, i; + int r, perm_ok = 0, quit = 0, i; struct stat st; if (stat(filename, &st) < 0) { - debug3("no such identity: %s", filename); + (userprovided ? logit : debug3)("no such identity: %s: %s", + filename, strerror(errno)); return NULL; } - private = key_load_private_type(KEY_UNSPEC, filename, "", NULL, &perm_ok); - if (!perm_ok) - return NULL; - if (private == NULL) { - if (options.batch_mode) - return NULL; - snprintf(prompt, sizeof prompt, - "Enter passphrase for key '%.100s': ", filename); - for (i = 0; i < options.number_of_password_prompts; i++) { + snprintf(prompt, sizeof prompt, + "Enter passphrase for key '%.100s': ", filename); + for (i = 0; i <= options.number_of_password_prompts; i++) { + if (i == 0) + passphrase = ""; + else { passphrase = read_passphrase(prompt, 0); - if (strcmp(passphrase, "") != 0) { - private = key_load_private_type(KEY_UNSPEC, - filename, passphrase, NULL, NULL); - quit = 0; - } else { + if (*passphrase == '\0') { debug2("no passphrase given, try next key"); - quit = 1; - } - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - if (private != NULL || quit) + free(passphrase); break; - debug2("bad passphrase given, try again..."); + } } + switch ((r = sshkey_load_private_type(KEY_UNSPEC, filename, + passphrase, &private, NULL, &perm_ok))) { + case 0: + break; + case SSH_ERR_KEY_WRONG_PASSPHRASE: + if (options.batch_mode) { + quit = 1; + break; + } + if (i != 0) + debug2("bad passphrase given, try again..."); + break; + case SSH_ERR_SYSTEM_ERROR: + if (errno == ENOENT) { + debug2("Load key \"%s\": %s", + filename, ssh_err(r)); + quit = 1; + break; + } + /* FALLTHROUGH */ + default: + error("Load key \"%s\": %s", filename, ssh_err(r)); + quit = 1; + break; + } + if (i > 0) { + explicit_bzero(passphrase, strlen(passphrase)); + free(passphrase); + } + if (private != NULL || quit) + break; } return private; } @@ -1390,19 +1219,19 @@ load_identity_file(char *filename) static void pubkey_prepare(Authctxt *authctxt) { - Identity *id; - Idlist agent, files, *preferred; - Key *key; - AuthenticationConnection *ac; - char *comment; - int i, found; + struct identity *id, *id2, *tmp; + struct idlist agent, files, *preferred; + struct sshkey *key; + int agent_fd, i, r, found; + size_t j; + struct ssh_identitylist *idlist; TAILQ_INIT(&agent); /* keys from the agent */ TAILQ_INIT(&files); /* keys from the config file */ preferred = &authctxt->keys; TAILQ_INIT(preferred); /* preferred order of keys */ - /* list of keys stored in the filesystem */ + /* list of keys stored in the filesystem and PKCS#11 */ for (i = 0; i < options.num_identity_files; i++) { key = options.identity_keys[i]; if (key && key->type == KEY_RSA1) @@ -1413,40 +1242,75 @@ pubkey_prepare(Authctxt *authctxt) id = xcalloc(1, sizeof(*id)); id->key = key; id->filename = xstrdup(options.identity_files[i]); + id->userprovided = options.identity_file_userprovided[i]; TAILQ_INSERT_TAIL(&files, id, next); } + /* Prefer PKCS11 keys that are explicitly listed */ + TAILQ_FOREACH_SAFE(id, &files, next, tmp) { + if (id->key == NULL || (id->key->flags & SSHKEY_FLAG_EXT) == 0) + continue; + found = 0; + TAILQ_FOREACH(id2, &files, next) { + if (id2->key == NULL || + (id2->key->flags & SSHKEY_FLAG_EXT) == 0) + continue; + if (sshkey_equal(id->key, id2->key)) { + TAILQ_REMOVE(&files, id, next); + TAILQ_INSERT_TAIL(preferred, id, next); + found = 1; + break; + } + } + /* If IdentitiesOnly set and key not found then don't use it */ + if (!found && options.identities_only) { + TAILQ_REMOVE(&files, id, next); + explicit_bzero(id, sizeof(*id)); + free(id); + } + } /* list of keys supported by the agent */ - if ((ac = ssh_get_authentication_connection())) { - for (key = ssh_get_first_identity(ac, &comment, 2); - key != NULL; - key = ssh_get_next_identity(ac, &comment, 2)) { + if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) { + if (r != SSH_ERR_AGENT_NOT_PRESENT) + debug("%s: ssh_get_authentication_socket: %s", + __func__, ssh_err(r)); + } else if ((r = ssh_fetch_identitylist(agent_fd, 2, &idlist)) != 0) { + if (r != SSH_ERR_AGENT_NO_IDENTITIES) + debug("%s: ssh_fetch_identitylist: %s", + __func__, ssh_err(r)); + } else { + for (j = 0; j < idlist->nkeys; j++) { found = 0; TAILQ_FOREACH(id, &files, next) { - /* agent keys from the config file are preferred */ - if (key_equal(key, id->key)) { - key_free(key); - xfree(comment); + /* + * agent keys from the config file are + * preferred + */ + if (sshkey_equal(idlist->keys[j], id->key)) { TAILQ_REMOVE(&files, id, next); TAILQ_INSERT_TAIL(preferred, id, next); - id->ac = ac; + id->agent_fd = agent_fd; found = 1; break; } } if (!found && !options.identities_only) { id = xcalloc(1, sizeof(*id)); - id->key = key; - id->filename = comment; - id->ac = ac; + /* XXX "steals" key/comment from idlist */ + id->key = idlist->keys[j]; + id->filename = idlist->comments[j]; + idlist->keys[j] = NULL; + idlist->comments[j] = NULL; + id->agent_fd = agent_fd; TAILQ_INSERT_TAIL(&agent, id, next); } } + ssh_free_identitylist(idlist); /* append remaining agent keys */ for (id = TAILQ_FIRST(&agent); id; id = TAILQ_FIRST(&agent)) { TAILQ_REMOVE(&agent, id, next); TAILQ_INSERT_TAIL(preferred, id, next); } - authctxt->agent = ac; + authctxt->agent_fd = agent_fd; } /* append remaining keys from the config file */ for (id = TAILQ_FIRST(&files); id; id = TAILQ_FIRST(&files)) { @@ -1454,7 +1318,8 @@ pubkey_prepare(Authctxt *authctxt) TAILQ_INSERT_TAIL(preferred, id, next); } TAILQ_FOREACH(id, preferred, next) { - debug2("key: %s (%p)", id->filename, id->key); + debug2("key: %s (%p),%s", id->filename, id->key, + id->userprovided ? " explicit" : ""); } } @@ -1463,19 +1328,38 @@ pubkey_cleanup(Authctxt *authctxt) { Identity *id; - if (authctxt->agent != NULL) - ssh_close_authentication_connection(authctxt->agent); + if (authctxt->agent_fd != -1) + ssh_close_authentication_socket(authctxt->agent_fd); for (id = TAILQ_FIRST(&authctxt->keys); id; id = TAILQ_FIRST(&authctxt->keys)) { TAILQ_REMOVE(&authctxt->keys, id, next); if (id->key) - key_free(id->key); - if (id->filename) - xfree(id->filename); - xfree(id); + sshkey_free(id->key); + free(id->filename); + free(id); } } +static int +try_identity(Identity *id) +{ + if (!id->key) + return (0); + if (match_pattern_list(sshkey_ssh_name(id->key), + options.pubkey_key_types, 0) != 1) { + debug("Skipping %s key %s for not in PubkeyAcceptedKeyTypes", + sshkey_ssh_name(id->key), id->filename); + return (0); + } + if (key_type_plain(id->key->type) == KEY_RSA && + (datafellows & SSH_BUG_RSASIGMD5) != 0) { + debug("Skipped %s key %s for RSA/MD5 server", + key_type(id->key), id->filename); + return (0); + } + return (id->key->type != KEY_RSA1); +} + int userauth_pubkey(Authctxt *authctxt) { @@ -1493,16 +1377,22 @@ userauth_pubkey(Authctxt *authctxt) * encrypted keys we cannot do this and have to load the * private key instead */ - if (id->key && id->key->type != KEY_RSA1) { - debug("Offering %s public key: %s", key_type(id->key), - id->filename); - sent = send_pubkey_test(authctxt, id); - } else if (id->key == NULL) { + if (id->key != NULL) { + if (try_identity(id)) { + debug("Offering %s public key: %s", + key_type(id->key), id->filename); + sent = send_pubkey_test(authctxt, id); + } + } else { debug("Trying private key: %s", id->filename); - id->key = load_identity_file(id->filename); + id->key = load_identity_file(id->filename, + id->userprovided); if (id->key != NULL) { - id->isprivate = 1; - sent = sign_and_send_pubkey(authctxt, id); + if (try_identity(id)) { + id->isprivate = 1; + sent = sign_and_send_pubkey( + authctxt, id); + } key_free(id->key); id->key = NULL; } @@ -1547,7 +1437,7 @@ userauth_kbdint(Authctxt *authctxt) /* * parse INFO_REQUEST, prompt user and send INFO_RESPONSE */ -void +int input_userauth_info_req(int type, u_int32_t seq, void *ctxt) { Authctxt *authctxt = ctxt; @@ -1569,9 +1459,9 @@ input_userauth_info_req(int type, u_int32_t seq, void *ctxt) logit("%s", name); if (strlen(inst) > 0) logit("%s", inst); - xfree(name); - xfree(inst); - xfree(lang); + free(name); + free(inst); + free(lang); num_prompts = packet_get_int(); /* @@ -1591,93 +1481,131 @@ input_userauth_info_req(int type, u_int32_t seq, void *ctxt) response = read_passphrase(prompt, echo ? RP_ECHO : 0); packet_put_cstring(response); - memset(response, 0, strlen(response)); - xfree(response); - xfree(prompt); + explicit_bzero(response, strlen(response)); + free(response); + free(prompt); } packet_check_eom(); /* done with parsing incoming message. */ packet_add_padding(64); packet_send(); + return 0; } static int -ssh_keysign(Key *key, u_char **sigp, u_int *lenp, - u_char *data, u_int datalen) +ssh_keysign(struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen) { #ifndef WIN32_FIXME - Buffer b; + struct sshbuf *b; struct stat st; pid_t pid; - int to[2], from[2], status, version = 2; + int i, r, to[2], from[2], status, sock = packet_get_connection_in(); + u_char rversion = 0, version = 2; + void (*osigchld)(int); - debug2("ssh_keysign called"); + *sigp = NULL; + *lenp = 0; if (stat(_PATH_SSH_KEY_SIGN, &st) < 0) { - error("ssh_keysign: not installed: %s", strerror(errno)); + error("%s: not installed: %s", __func__, strerror(errno)); + return -1; + } + if (fflush(stdout) != 0) { + error("%s: fflush: %s", __func__, strerror(errno)); return -1; } - if (fflush(stdout) != 0) - error("ssh_keysign: fflush: %s", strerror(errno)); if (pipe(to) < 0) { - error("ssh_keysign: pipe: %s", strerror(errno)); + error("%s: pipe: %s", __func__, strerror(errno)); return -1; } if (pipe(from) < 0) { - error("ssh_keysign: pipe: %s", strerror(errno)); + error("%s: pipe: %s", __func__, strerror(errno)); return -1; } if ((pid = fork()) < 0) { - error("ssh_keysign: fork: %s", strerror(errno)); + error("%s: fork: %s", __func__, strerror(errno)); return -1; } + osigchld = signal(SIGCHLD, SIG_DFL); if (pid == 0) { /* keep the socket on exec */ - fcntl(packet_get_connection_in(), F_SETFD, 0); + fcntl(sock, F_SETFD, 0); permanently_drop_suid(getuid()); close(from[0]); if (dup2(from[1], STDOUT_FILENO) < 0) - fatal("ssh_keysign: dup2: %s", strerror(errno)); + fatal("%s: dup2: %s", __func__, strerror(errno)); close(to[1]); if (dup2(to[0], STDIN_FILENO) < 0) - fatal("ssh_keysign: dup2: %s", strerror(errno)); + fatal("%s: dup2: %s", __func__, strerror(errno)); close(from[1]); close(to[0]); + /* Close everything but stdio and the socket */ + for (i = STDERR_FILENO + 1; i < sock; i++) + close(i); + closefrom(sock + 1); + debug3("%s: [child] pid=%ld, exec %s", + __func__, (long)getpid(), _PATH_SSH_KEY_SIGN); execl(_PATH_SSH_KEY_SIGN, _PATH_SSH_KEY_SIGN, (char *) 0); - fatal("ssh_keysign: exec(%s): %s", _PATH_SSH_KEY_SIGN, + fatal("%s: exec(%s): %s", __func__, _PATH_SSH_KEY_SIGN, strerror(errno)); } close(from[1]); close(to[0]); - buffer_init(&b); - buffer_put_int(&b, packet_get_connection_in()); /* send # of socket */ - buffer_put_string(&b, data, datalen); - if (ssh_msg_send(to[1], version, &b) == -1) - fatal("ssh_keysign: couldn't send request"); - - if (ssh_msg_recv(from[0], &b) < 0) { - error("ssh_keysign: no reply"); - buffer_free(&b); - return -1; - } + if ((b = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new failed", __func__); + /* send # of sock, data to be signed */ + if ((r = sshbuf_put_u32(b, sock) != 0) || + (r = sshbuf_put_string(b, data, datalen)) != 0) + fatal("%s: buffer error: %s", __func__, ssh_err(r)); + if (ssh_msg_send(to[1], version, b) == -1) + fatal("%s: couldn't send request", __func__); + sshbuf_reset(b); + r = ssh_msg_recv(from[0], b); close(from[0]); close(to[1]); + if (r < 0) { + error("%s: no reply", __func__); + goto fail; + } - while (waitpid(pid, &status, 0) < 0) - if (errno != EINTR) - break; - - if (buffer_get_char(&b) != version) { - error("ssh_keysign: bad version"); - buffer_free(&b); + errno = 0; + while (waitpid(pid, &status, 0) < 0) { + if (errno != EINTR) { + error("%s: waitpid %ld: %s", + __func__, (long)pid, strerror(errno)); + goto fail; + } + } + if (!WIFEXITED(status)) { + error("%s: exited abnormally", __func__); + goto fail; + } + if (WEXITSTATUS(status) != 0) { + error("%s: exited with status %d", + __func__, WEXITSTATUS(status)); + goto fail; + } + if ((r = sshbuf_get_u8(b, &rversion)) != 0) { + error("%s: buffer error: %s", __func__, ssh_err(r)); + goto fail; + } + if (rversion != version) { + error("%s: bad version", __func__); + goto fail; + } + if ((r = sshbuf_get_string(b, sigp, lenp)) != 0) { + error("%s: buffer error: %s", __func__, ssh_err(r)); + fail: + signal(SIGCHLD, osigchld); + sshbuf_free(b); return -1; } - *sigp = buffer_get_string(&b, lenp); - buffer_free(&b); + signal(SIGCHLD, osigchld); + sshbuf_free(b); return 0; - #else /* @@ -1692,168 +1620,149 @@ ssh_keysign(Key *key, u_char **sigp, u_int *lenp, int userauth_hostbased(Authctxt *authctxt) { - Key *private = NULL; - Sensitive *sensitive = authctxt->sensitive; - Buffer b; - u_char *signature, *blob; - char *chost, *pkalg, *p; + struct ssh *ssh = active_state; + struct sshkey *private = NULL; + struct sshbuf *b = NULL; const char *service; - u_int blen, slen; - int ok, i, found = 0; + u_char *sig = NULL, *keyblob = NULL; + char *fp = NULL, *chost = NULL, *lname = NULL; + size_t siglen = 0, keylen = 0; + int i, r, success = 0; - /* check for a useful key */ - for (i = 0; i < sensitive->nkeys; i++) { - private = sensitive->keys[i]; - if (private && private->type != KEY_RSA1) { - found = 1; + if (authctxt->ktypes == NULL) { + authctxt->oktypes = xstrdup(options.hostbased_key_types); + authctxt->ktypes = authctxt->oktypes; + } + + /* + * Work through each listed type pattern in HostbasedKeyTypes, + * trying each hostkey that matches the type in turn. + */ + for (;;) { + if (authctxt->active_ktype == NULL) + authctxt->active_ktype = strsep(&authctxt->ktypes, ","); + if (authctxt->active_ktype == NULL || + *authctxt->active_ktype == '\0') + break; + debug3("%s: trying key type %s", __func__, + authctxt->active_ktype); + + /* check for a useful key */ + private = NULL; + for (i = 0; i < authctxt->sensitive->nkeys; i++) { + if (authctxt->sensitive->keys[i] == NULL || + authctxt->sensitive->keys[i]->type == KEY_RSA1 || + authctxt->sensitive->keys[i]->type == KEY_UNSPEC) + continue; + if (match_pattern_list( + sshkey_ssh_name(authctxt->sensitive->keys[i]), + authctxt->active_ktype, 0) != 1) + continue; /* we take and free the key */ - sensitive->keys[i] = NULL; + private = authctxt->sensitive->keys[i]; + authctxt->sensitive->keys[i] = NULL; break; } + /* Found one */ + if (private != NULL) + break; + /* No more keys of this type; advance */ + authctxt->active_ktype = NULL; } - if (!found) { + if (private == NULL) { + free(authctxt->oktypes); + authctxt->oktypes = authctxt->ktypes = NULL; + authctxt->active_ktype = NULL; debug("No more client hostkeys for hostbased authentication."); - return 0; + goto out; } - if (key_to_blob(private, &blob, &blen) == 0) { - key_free(private); - return 0; + + if ((fp = sshkey_fingerprint(private, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) { + error("%s: sshkey_fingerprint failed", __func__); + goto out; } + debug("%s: trying hostkey %s %s", + __func__, sshkey_ssh_name(private), fp); + /* figure out a name for the client host */ - p = get_local_name(packet_get_connection_in()); - if (p == NULL) { - error("userauth_hostbased: cannot get local ipaddr/name"); - key_free(private); - xfree(blob); - return 0; + if ((lname = get_local_name(packet_get_connection_in())) == NULL) { + error("%s: cannot get local ipaddr/name", __func__); + goto out; } - xasprintf(&chost, "%s.", p); - debug2("userauth_hostbased: chost %s", chost); - xfree(p); + + /* XXX sshbuf_put_stringf? */ + xasprintf(&chost, "%s.", lname); + debug2("%s: chost %s", __func__, chost); service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : authctxt->service; - pkalg = xstrdup(key_ssh_name(private)); - buffer_init(&b); + /* construct data */ - buffer_put_string(&b, session_id2, session_id2_len); - buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); - buffer_put_cstring(&b, authctxt->server_user); - buffer_put_cstring(&b, service); - buffer_put_cstring(&b, authctxt->method->name); - buffer_put_cstring(&b, pkalg); - buffer_put_string(&b, blob, blen); - buffer_put_cstring(&b, chost); - buffer_put_cstring(&b, authctxt->local_user); + if ((b = sshbuf_new()) == NULL) { + error("%s: sshbuf_new failed", __func__); + goto out; + } + if ((r = sshkey_to_blob(private, &keyblob, &keylen)) != 0) { + error("%s: sshkey_to_blob: %s", __func__, ssh_err(r)); + goto out; + } + if ((r = sshbuf_put_string(b, session_id2, session_id2_len)) != 0 || + (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 || + (r = sshbuf_put_cstring(b, authctxt->server_user)) != 0 || + (r = sshbuf_put_cstring(b, service)) != 0 || + (r = sshbuf_put_cstring(b, authctxt->method->name)) != 0 || + (r = sshbuf_put_cstring(b, key_ssh_name(private))) != 0 || + (r = sshbuf_put_string(b, keyblob, keylen)) != 0 || + (r = sshbuf_put_cstring(b, chost)) != 0 || + (r = sshbuf_put_cstring(b, authctxt->local_user)) != 0) { + error("%s: buffer error: %s", __func__, ssh_err(r)); + goto out; + } + #ifdef DEBUG_PK - buffer_dump(&b); + sshbuf_dump(b, stderr); #endif - if (sensitive->external_keysign) - ok = ssh_keysign(private, &signature, &slen, - buffer_ptr(&b), buffer_len(&b)); - else - ok = key_sign(private, &signature, &slen, - buffer_ptr(&b), buffer_len(&b)); - key_free(private); - buffer_free(&b); - if (ok != 0) { - error("key_sign failed"); - xfree(chost); - xfree(pkalg); - xfree(blob); - return 0; + if (authctxt->sensitive->external_keysign) + r = ssh_keysign(private, &sig, &siglen, + sshbuf_ptr(b), sshbuf_len(b)); + else if ((r = sshkey_sign(private, &sig, &siglen, + sshbuf_ptr(b), sshbuf_len(b), datafellows)) != 0) + debug("%s: sshkey_sign: %s", __func__, ssh_err(r)); + if (r != 0) { + error("sign using hostkey %s %s failed", + sshkey_ssh_name(private), fp); + goto out; } - packet_start(SSH2_MSG_USERAUTH_REQUEST); - packet_put_cstring(authctxt->server_user); - packet_put_cstring(authctxt->service); - packet_put_cstring(authctxt->method->name); - packet_put_cstring(pkalg); - packet_put_string(blob, blen); - packet_put_cstring(chost); - packet_put_cstring(authctxt->local_user); - packet_put_string(signature, slen); - memset(signature, 's', slen); - xfree(signature); - xfree(chost); - xfree(pkalg); - xfree(blob); - - packet_send(); - return 1; -} - -#ifdef JPAKE -int -userauth_jpake(Authctxt *authctxt) -{ - struct jpake_ctx *pctx; - u_char *x1_proof, *x2_proof; - u_int x1_proof_len, x2_proof_len; - static int attempt = 0; /* XXX share with userauth_password's? */ - - if (attempt++ >= options.number_of_password_prompts) - return 0; - if (attempt != 1) - error("Permission denied, please try again."); - - if (authctxt->methoddata != NULL) - fatal("%s: authctxt->methoddata already set (%p)", - __func__, authctxt->methoddata); - - authctxt->methoddata = pctx = jpake_new(); - - /* - * Send request immediately, to get the protocol going while - * we do the initial computations. - */ - packet_start(SSH2_MSG_USERAUTH_REQUEST); - packet_put_cstring(authctxt->server_user); - packet_put_cstring(authctxt->service); - packet_put_cstring(authctxt->method->name); - packet_send(); - packet_write_wait(); - - jpake_step1(pctx->grp, - &pctx->client_id, &pctx->client_id_len, - &pctx->x1, &pctx->x2, &pctx->g_x1, &pctx->g_x2, - &x1_proof, &x1_proof_len, - &x2_proof, &x2_proof_len); - - JPAKE_DEBUG_CTX((pctx, "step 1 sending in %s", __func__)); - - packet_start(SSH2_MSG_USERAUTH_JPAKE_CLIENT_STEP1); - packet_put_string(pctx->client_id, pctx->client_id_len); - packet_put_bignum2(pctx->g_x1); - packet_put_bignum2(pctx->g_x2); - packet_put_string(x1_proof, x1_proof_len); - packet_put_string(x2_proof, x2_proof_len); - packet_send(); - - bzero(x1_proof, x1_proof_len); - bzero(x2_proof, x2_proof_len); - xfree(x1_proof); - xfree(x2_proof); - - /* Expect step 1 packet from peer */ - dispatch_set(SSH2_MSG_USERAUTH_JPAKE_SERVER_STEP1, - input_userauth_jpake_server_step1); - dispatch_set(SSH2_MSG_USERAUTH_SUCCESS, - &input_userauth_success_unexpected); - - return 1; -} - -void -userauth_jpake_cleanup(Authctxt *authctxt) -{ - debug3("%s: clean up", __func__); - if (authctxt->methoddata != NULL) { - jpake_free(authctxt->methoddata); - authctxt->methoddata = NULL; + if ((r = sshpkt_start(ssh, SSH2_MSG_USERAUTH_REQUEST)) != 0 || + (r = sshpkt_put_cstring(ssh, authctxt->server_user)) != 0 || + (r = sshpkt_put_cstring(ssh, authctxt->service)) != 0 || + (r = sshpkt_put_cstring(ssh, authctxt->method->name)) != 0 || + (r = sshpkt_put_cstring(ssh, key_ssh_name(private))) != 0 || + (r = sshpkt_put_string(ssh, keyblob, keylen)) != 0 || + (r = sshpkt_put_cstring(ssh, chost)) != 0 || + (r = sshpkt_put_cstring(ssh, authctxt->local_user)) != 0 || + (r = sshpkt_put_string(ssh, sig, siglen)) != 0 || + (r = sshpkt_send(ssh)) != 0) { + error("%s: packet error: %s", __func__, ssh_err(r)); + goto out; } - dispatch_set(SSH2_MSG_USERAUTH_SUCCESS, &input_userauth_success); + success = 1; + + out: + if (sig != NULL) { + explicit_bzero(sig, siglen); + free(sig); + } + free(keyblob); + free(lname); + free(fp); + free(chost); + sshkey_free(private); + sshbuf_free(b); + + return success; } -#endif /* JPAKE */ /* find auth method */ @@ -1909,8 +1818,7 @@ authmethod_get(char *authlist) if (supported == NULL || strcmp(authlist, supported) != 0) { debug3("start over, passed a different list %s", authlist); - if (supported != NULL) - xfree(supported); + free(supported); supported = xstrdup(authlist); preferred = options.preferred_authentications; debug3("preferred %s", preferred); @@ -1931,12 +1839,11 @@ authmethod_get(char *authlist) authmethod_is_enabled(current)) { debug3("authmethod_is_enabled %s", name); debug("Next authentication method: %s", name); - xfree(name); + free(name); return current; } + free(name); } - if (name != NULL) - xfree(name); } static char * @@ -1959,3 +1866,4 @@ authmethods_get(void) buffer_free(&b); return list; } + diff --git a/sshd.c b/sshd.c index dc843a2..8c34aee 100644 --- a/sshd.c +++ b/sshd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshd.c,v 1.385 2011/06/23 09:34:13 djm Exp $ */ +/* $OpenBSD: sshd.c,v 1.458 2015/08/20 22:32:42 deraadt Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -51,6 +51,8 @@ #ifdef WIN32_FIXME #undef GSSAPI #undef KRB5 + #define ECONNABORTED WSAECONNABORTED + #define ECONNREFUSED WSAECONNREFUSED #endif #include @@ -80,12 +82,14 @@ #include #include #include +#include +#ifdef WITH_OPENSSL #include #include -#include #include #include "openbsd-compat/openssl-compat.h" +#endif #ifdef HAVE_SECUREWARE #include @@ -101,13 +105,15 @@ #include "packet.h" #include "log.h" #include "buffer.h" +#include "misc.h" +#include "match.h" #include "servconf.h" #include "uidswap.h" #include "compat.h" #include "cipher.h" +#include "digest.h" #include "key.h" #include "kex.h" -#include "dh.h" #include "myproposal.h" #include "authfile.h" #include "pathnames.h" @@ -115,7 +121,7 @@ #include "canohost.h" #include "hostfile.h" #include "auth.h" -#include "misc.h" +#include "authfd.h" #include "msg.h" #include "dispatch.h" #include "channels.h" @@ -129,19 +135,12 @@ #include "roaming.h" #include "ssh-sandbox.h" #include "version.h" +#include "ssherr.h" #ifdef RUNTIME_LIBPAM #include "pam.h" #endif - -#ifdef LIBWRAP -#include -#include -int allow_severity; -int deny_severity; -#endif /* LIBWRAP */ - #ifndef O_NOCTTY #define O_NOCTTY 0 #endif @@ -220,8 +219,9 @@ int num_listen_socks = 0; char *client_version_string = NULL; char *server_version_string = NULL; -/* for rekeying XXX fixme */ -Kex *xxx_kex; +/* Daemon's agent connection */ +int auth_sock = -1; +int have_agent = 0; /* * Any really sensitive data in the application is contained in this @@ -235,6 +235,7 @@ struct { Key *server_key; /* ephemeral server key */ Key *ssh1_host_key; /* ssh1 host key */ Key **host_keys; /* all private host keys */ + Key **host_pubkeys; /* all public host keys */ Key **host_certificates; /* all public host certificates */ int have_ssh1_key; int have_ssh2_key; @@ -259,7 +260,7 @@ u_char *session_id2 = NULL; u_int session_id2_len = 0; /* record remote hostname or ip */ -u_int utmp_len = MAXHOSTNAMELEN; +u_int utmp_len = HOST_NAME_MAX+1; /* options.max_startup sized array of fd ints */ int *startup_pipes = NULL; @@ -268,6 +269,7 @@ int startup_pipe; /* in child */ /* variables used for privilege separation */ int use_privsep = -1; struct monitor *pmonitor = NULL; +int privsep_is_preauth = 1; /* global authentication context */ Authctxt *the_authctxt = NULL; @@ -285,7 +287,9 @@ struct passwd *privsep_pw = NULL; void destroy_sensitive_data(void); void demote_sensitive_data(void); +#ifdef WITH_SSH1 static void do_ssh1_kex(void); +#endif static void do_ssh2_kex(void); /* @@ -557,6 +561,8 @@ static void do_ssh2_kex(void); #endif /* WIN32_FIXME */ + + /* * Close all listening sockets */ @@ -609,6 +615,7 @@ sighup_restart(void) { #ifndef WIN32_FIXME logit("Received SIGHUP; restarting."); + platform_pre_restart(); close_listen_socks(); close_startup_pipes(); alarm(0); /* alarm timer persists across exec */ @@ -663,6 +670,15 @@ grace_alarm_handler(int sig) if (use_privsep && pmonitor != NULL && pmonitor->m_pid > 0) kill(pmonitor->m_pid, SIGALRM); + /* + * Try to kill any processes that we have spawned, E.g. authorized + * keys command helpers. + */ + if (getpgid(0) == getpid()) { + signal(SIGTERM, SIG_IGN); + kill(0, SIGTERM); + } + /* Log error and exit. */ sigdie("Timeout before authentication for %s", get_remote_ipaddr()); #endif @@ -687,7 +703,6 @@ generate_ephemeral_server_key(void) verbose("RSA key generation complete."); arc4random_buf(sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH); - arc4random_stir(); } /*ARGSUSED*/ @@ -724,9 +739,11 @@ sshd_exchange_identification(int sock_in, int sock_out) major = PROTOCOL_MAJOR_1; minor = PROTOCOL_MINOR_1; } - snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s%s", major, minor, - SSH_VERSION, newline); - server_version_string = xstrdup(buf); + + xasprintf(&server_version_string, "SSH-%d.%d-%.100s%s%s%s", + major, minor, SSH_VERSION, + *options.version_addendum == '\0' ? "" : " ", + options.version_addendum, newline); /* Send our protocol version identification. */ if (roaming_atomicio(vwrite, sock_out, server_version_string, @@ -768,28 +785,36 @@ sshd_exchange_identification(int sock_in, int sock_out) &remote_major, &remote_minor, remote_version) != 3) { s = "Protocol mismatch.\n"; (void) atomicio(vwrite, sock_out, s, strlen(s)); + logit("Bad protocol version identification '%.100s' " + "from %s port %d", client_version_string, + get_remote_ipaddr(), get_remote_port()); close(sock_in); close(sock_out); - logit("Bad protocol version identification '%.100s' from %s", - client_version_string, get_remote_ipaddr()); cleanup_exit(255); } debug("Client protocol version %d.%d; client software version %.100s", remote_major, remote_minor, remote_version); - compat_datafellows(remote_version); + active_state->compat = compat_datafellows(remote_version); - if (datafellows & SSH_BUG_PROBE) { + if ((datafellows & SSH_BUG_PROBE) != 0) { logit("probed from %s with %s. Don't panic.", get_remote_ipaddr(), client_version_string); cleanup_exit(255); } - - if (datafellows & SSH_BUG_SCANNER) { + if ((datafellows & SSH_BUG_SCANNER) != 0) { logit("scanned from %s with %s. Don't panic.", get_remote_ipaddr(), client_version_string); cleanup_exit(255); } + if ((datafellows & SSH_BUG_RSASIGMD5) != 0) { + logit("Client version \"%.100s\" uses unsafe RSA signature " + "scheme; disabling use of RSA keys", remote_version); + } + if ((datafellows & SSH_BUG_DERIVEKEY) != 0) { + fatal("Client version \"%.100s\" uses unsafe key agreement; " + "refusing connection", remote_version); + } mismatch = 0; switch (remote_major) { @@ -859,7 +884,7 @@ destroy_sensitive_data(void) } } sensitive_data.ssh1_host_key = NULL; - memset(sensitive_data.ssh1_cookie, 0, SSH_SESSION_KEY_LENGTH); + explicit_bzero(sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH); } /* Demote private to public keys for network child */ @@ -899,9 +924,18 @@ privsep_preauth_child(void) /* Enable challenge-response authentication for privilege separation */ privsep_challenge_enable(); +#ifdef GSSAPI + /* Cache supported mechanism OIDs for later use */ + if (options.gss_authentication) + ssh_gssapi_prepare_supported_oids(); +#endif + arc4random_stir(); arc4random_buf(rnd, sizeof(rnd)); +#ifdef WITH_OPENSSL RAND_seed(rnd, sizeof(rnd)); +#endif + explicit_bzero(rnd, sizeof(rnd)); /* Demote the private keys to public keys. */ demote_sensitive_data(); @@ -932,26 +966,34 @@ static int privsep_preauth(Authctxt *authctxt) { #ifndef WIN32_FIXME - int status; + int status, r; pid_t pid; struct ssh_sandbox *box = NULL; /* Set up unprivileged child process to deal with network data */ pmonitor = monitor_init(); /* Store a pointer to the kex for later rekeying */ - pmonitor->m_pkex = &xxx_kex; + pmonitor->m_pkex = &active_state->kex; - if (use_privsep == PRIVSEP_SANDBOX) - box = ssh_sandbox_init(); + if (use_privsep == PRIVSEP_ON) + box = ssh_sandbox_init(pmonitor); pid = fork(); if (pid == -1) { fatal("fork of unprivileged child failed"); } else if (pid != 0) { debug2("Network child is on pid %ld", (long)pid); + pmonitor->m_pid = pid; + if (have_agent) { + r = ssh_get_authentication_socket(&auth_sock); + if (r != 0) { + error("Could not get agent socket: %s", + ssh_err(r)); + have_agent = 0; + } + } if (box != NULL) ssh_sandbox_parent_preauth(box, pid); - pmonitor->m_pid = pid; monitor_child_preauth(authctxt, pmonitor); /* Sync memory */ @@ -959,10 +1001,13 @@ privsep_preauth(Authctxt *authctxt) /* Wait for the child's exit status */ while (waitpid(pid, &status, 0) < 0) { - if (errno != EINTR) - fatal("%s: waitpid: %s", __func__, - strerror(errno)); + if (errno == EINTR) + continue; + pmonitor->m_pid = -1; + fatal("%s: waitpid: %s", __func__, strerror(errno)); } + privsep_is_preauth = 0; + pmonitor->m_pid = -1; if (WIFEXITED(status)) { if (WEXITSTATUS(status) != 0) fatal("%s: preauth child exited with status %d", @@ -1042,7 +1087,10 @@ privsep_postauth(Authctxt *authctxt) arc4random_stir(); arc4random_buf(rnd, sizeof(rnd)); +#ifdef WITH_OPENSSL RAND_seed(rnd, sizeof(rnd)); +#endif + explicit_bzero(rnd, sizeof(rnd)); /* Drop privileges */ do_setusercontext(authctxt->pw); @@ -1072,11 +1120,21 @@ list_hostkey_types(void) for (i = 0; i < options.num_host_key_files; i++) { key = sensitive_data.host_keys[i]; if (key == NULL) + key = sensitive_data.host_pubkeys[i]; + if (key == NULL || key->type == KEY_RSA1) continue; + /* Check that the key is accepted in HostkeyAlgorithms */ + if (match_pattern_list(sshkey_ssh_name(key), + options.hostkeyalgorithms, 0) != 1) { + debug3("%s: %s key not permitted by HostkeyAlgorithms", + __func__, sshkey_ssh_name(key)); + continue; + } switch (key->type) { case KEY_RSA: case KEY_DSA: case KEY_ECDSA: + case KEY_ED25519: if (buffer_len(&b) > 0) buffer_append(&b, ",", 1); p = key_ssh_name(key); @@ -1088,11 +1146,10 @@ list_hostkey_types(void) if (key == NULL) continue; switch (key->type) { - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: case KEY_RSA_CERT: case KEY_DSA_CERT: case KEY_ECDSA_CERT: + case KEY_ED25519_CERT: if (buffer_len(&b) > 0) buffer_append(&b, ",", 1); p = key_ssh_name(key); @@ -1108,25 +1165,27 @@ list_hostkey_types(void) } static Key * -get_hostkey_by_type(int type, int need_private) +get_hostkey_by_type(int type, int nid, int need_private, struct ssh *ssh) { int i; Key *key; for (i = 0; i < options.num_host_key_files; i++) { switch (type) { - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: case KEY_RSA_CERT: case KEY_DSA_CERT: case KEY_ECDSA_CERT: + case KEY_ED25519_CERT: key = sensitive_data.host_certificates[i]; break; default: key = sensitive_data.host_keys[i]; + if (key == NULL && !need_private) + key = sensitive_data.host_pubkeys[i]; break; } - if (key != NULL && key->type == type) + if (key != NULL && key->type == type && + (key->type != KEY_ECDSA || key->ecdsa_nid == nid)) return need_private ? sensitive_data.host_keys[i] : key; } @@ -1134,15 +1193,15 @@ get_hostkey_by_type(int type, int need_private) } Key * -get_hostkey_public_by_type(int type) +get_hostkey_public_by_type(int type, int nid, struct ssh *ssh) { - return get_hostkey_by_type(type, 0); + return get_hostkey_by_type(type, nid, 0, ssh); } Key * -get_hostkey_private_by_type(int type) +get_hostkey_private_by_type(int type, int nid, struct ssh *ssh) { - return get_hostkey_by_type(type, 1); + return get_hostkey_by_type(type, nid, 1, ssh); } Key * @@ -1153,23 +1212,84 @@ get_hostkey_by_index(int ind) return (sensitive_data.host_keys[ind]); } +Key * +get_hostkey_public_by_index(int ind, struct ssh *ssh) +{ + if (ind < 0 || ind >= options.num_host_key_files) + return (NULL); + return (sensitive_data.host_pubkeys[ind]); +} + int -get_hostkey_index(Key *key) +get_hostkey_index(Key *key, int compare, struct ssh *ssh) { int i; for (i = 0; i < options.num_host_key_files; i++) { if (key_is_cert(key)) { - if (key == sensitive_data.host_certificates[i]) + if (key == sensitive_data.host_certificates[i] || + (compare && sensitive_data.host_certificates[i] && + sshkey_equal(key, + sensitive_data.host_certificates[i]))) return (i); } else { - if (key == sensitive_data.host_keys[i]) + if (key == sensitive_data.host_keys[i] || + (compare && sensitive_data.host_keys[i] && + sshkey_equal(key, sensitive_data.host_keys[i]))) + return (i); + if (key == sensitive_data.host_pubkeys[i] || + (compare && sensitive_data.host_pubkeys[i] && + sshkey_equal(key, sensitive_data.host_pubkeys[i]))) return (i); } } return (-1); } +/* Inform the client of all hostkeys */ +static void +notify_hostkeys(struct ssh *ssh) +{ + struct sshbuf *buf; + struct sshkey *key; + int i, nkeys, r; + char *fp; + + /* Some clients cannot cope with the hostkeys message, skip those. */ + if (datafellows & SSH_BUG_HOSTKEYS) + return; + + if ((buf = sshbuf_new()) == NULL) + fatal("%s: sshbuf_new", __func__); + for (i = nkeys = 0; i < options.num_host_key_files; i++) { + key = get_hostkey_public_by_index(i, ssh); + if (key == NULL || key->type == KEY_UNSPEC || + key->type == KEY_RSA1 || sshkey_is_cert(key)) + continue; + fp = sshkey_fingerprint(key, options.fingerprint_hash, + SSH_FP_DEFAULT); + debug3("%s: key %d: %s %s", __func__, i, + sshkey_ssh_name(key), fp); + free(fp); + if (nkeys == 0) { + packet_start(SSH2_MSG_GLOBAL_REQUEST); + packet_put_cstring("hostkeys-00@openssh.com"); + packet_put_char(0); /* want-reply */ + } + sshbuf_reset(buf); + if ((r = sshkey_putb(key, buf)) != 0) + fatal("%s: couldn't put hostkey %d: %s", + __func__, i, ssh_err(r)); + packet_put_string(sshbuf_ptr(buf), sshbuf_len(buf)); + nkeys++; + } + debug3("%s: sent %d hostkeys", __func__, nkeys); + if (nkeys == 0) + fatal("%s: no hostkeys", __func__); + packet_send(); + sshbuf_free(buf); +} + /* * returns 1 if connection should be dropped, 0 otherwise. * dropping starts at connection #max_startups_begin with a probability @@ -1202,11 +1322,18 @@ static void usage(void) { fprintf(stderr, "%s, %s\n", - SSH_RELEASE, SSLeay_version(SSLEAY_VERSION)); + SSH_RELEASE, +#ifdef WITH_OPENSSL + SSLeay_version(SSLEAY_VERSION) +#else + "without OpenSSL" +#endif + ); fprintf(stderr, "usage: sshd [-46DdeiqTt] [-b bits] [-C connection_spec] [-c host_cert_file]\n" -" [-f config_file] [-g login_grace_time] [-h host_key_file]\n" -" [-k key_gen_time] [-o option] [-p port] [-u len]\n" +" [-E log_file] [-f config_file] [-g login_grace_time]\n" +" [-h host_key_file] [-k key_gen_time] [-o option] [-p port]\n" +" [-u len]\n" ); exit(1); } @@ -1234,6 +1361,7 @@ send_rexec_state(int fd, Buffer *conf) buffer_init(&m); buffer_put_cstring(&m, buffer_ptr(conf)); +#ifdef WITH_SSH1 if (sensitive_data.server_key != NULL && sensitive_data.server_key->type == KEY_RSA1) { buffer_put_int(&m, 1); @@ -1244,9 +1372,10 @@ send_rexec_state(int fd, Buffer *conf) buffer_put_bignum(&m, sensitive_data.server_key->rsa->p); buffer_put_bignum(&m, sensitive_data.server_key->rsa->q); } else +#endif buffer_put_int(&m, 0); -#ifndef OPENSSL_PRNG_ONLY +#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY) rexec_send_rng_seed(&m); #endif @@ -1277,9 +1406,10 @@ recv_rexec_state(int fd, Buffer *conf) cp = buffer_get_string(&m, &len); if (conf != NULL) buffer_append(conf, cp, len + 1); - xfree(cp); + free(cp); if (buffer_get_int(&m)) { +#ifdef WITH_SSH1 if (sensitive_data.server_key != NULL) key_free(sensitive_data.server_key); sensitive_data.server_key = key_new_private(KEY_RSA1); @@ -1289,11 +1419,14 @@ recv_rexec_state(int fd, Buffer *conf) buffer_get_bignum(&m, sensitive_data.server_key->rsa->iqmp); buffer_get_bignum(&m, sensitive_data.server_key->rsa->p); buffer_get_bignum(&m, sensitive_data.server_key->rsa->q); - rsa_generate_additional_parameters( - sensitive_data.server_key->rsa); + if (rsa_generate_additional_parameters( + sensitive_data.server_key->rsa) != 0) + fatal("%s: rsa_generate_additional_parameters " + "error", __func__); +#endif } -#ifndef OPENSSL_PRNG_ONLY +#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY) rexec_recv_rng_seed(&m); #endif @@ -1328,7 +1461,9 @@ server_accept_inetd(int *sock_in, int *sock_out) if ((fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { dup2(fd, STDIN_FILENO); dup2(fd, STDOUT_FILENO); - if (fd > STDOUT_FILENO) + if (!log_stderr) + dup2(fd, STDERR_FILENO); + if (fd > (log_stderr ? STDERR_FILENO : STDOUT_FILENO)) close(fd); } debug("inetd sockets after dupping: %d, %d", *sock_in, *sock_out); @@ -1380,7 +1515,6 @@ server_listen(void) /* Only communicate in IPv6 over AF_INET6 sockets. */ if (ai->ai_family == AF_INET6) sock_set_v6only(listen_sock); - #ifdef WIN32_FIXME /* @@ -1434,6 +1568,7 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) struct sockaddr_storage from; socklen_t fromlen; pid_t pid; + u_char rnd[256]; /* setup fd set for accept */ fdset = NULL; @@ -1454,15 +1589,15 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) if (received_sighup) sighup_restart(); if (fdset != NULL) - xfree(fdset); - + free(fdset); #ifndef WIN32_FIXME - fdset = (fd_set *)xcalloc(howmany(maxfd + 1, NFDBITS), + fdset = xcalloc(howmany(maxfd + 1, NFDBITS), sizeof(fd_mask)); #else fdset = (fd_set *) xmalloc(sizeof(fd_set)); FD_ZERO(fdset); #endif + for (i = 0; i < num_listen_socks; i++) FD_SET(listen_socks[i], fdset); @@ -1478,7 +1613,8 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) logit("Received signal %d; terminating.", (int) received_sigterm); close_listen_socks(); - unlink(options.pid_file); + if (options.pid_file != NULL) + unlink(options.pid_file); exit(received_sigterm == SIGTERM ? 0 : 255); } if (key_used && key_do_regen) { @@ -1509,9 +1645,13 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) *newsock = accept(listen_socks[i], (struct sockaddr *)&from, &fromlen); if (*newsock < 0) { - if (errno != EINTR && errno != EAGAIN && - errno != EWOULDBLOCK) - error("accept: %.100s", strerror(errno)); + if (errno != EINTR && errno != EWOULDBLOCK + && errno != ECONNABORTED + && errno != EAGAIN) + error("accept: %.100s", + strerror(errno)); + if (errno == EMFILE || errno == ENFILE) + usleep(100 * 1000); continue; } if (unset_nonblock(*newsock) == -1) { @@ -1523,7 +1663,6 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) close(*newsock); continue; } - #ifndef WIN32_FIXME if (pipe(startup_p) == -1) { close(*newsock); @@ -1540,7 +1679,6 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) continue; } #endif - for (j = 0; j < options.max_startups; j++) if (startup_pipes[j] == -1) { startup_pipes[j] = startup_p[0]; @@ -1549,7 +1687,6 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) startups++; break; } - #ifdef WIN32_FIXME /* @@ -1615,7 +1752,8 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) /* * Original OpenSSH code. */ - + + /* * Got connection. Fork a child to handle it, unless * we are in debugging mode. @@ -1641,6 +1779,7 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) } break; } + /* * Normal production daemon. Fork, and have * the child process the connection. The @@ -1705,9 +1844,12 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) * from that of the child */ arc4random_stir(); - - #endif /* else WIN32_FIXME */ - + arc4random_buf(rnd, sizeof(rnd)); +#ifdef WITH_OPENSSL + RAND_seed(rnd, sizeof(rnd)); +#endif + explicit_bzero(rnd, sizeof(rnd)); +#endif /* else WIN32_FIXME */ } /* child process check (or debug mode) */ @@ -1753,6 +1895,8 @@ server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s) #endif /* WIN32_FIXME */ + + /* * Main program for the daemon. */ @@ -1761,17 +1905,20 @@ main(int ac, char **av) { extern char *optarg; extern int optind; - int opt, i, j, on = 1; + int r, opt, i, j, on = 1; int sock_in = -1, sock_out = -1, newsock = -1; const char *remote_ip; - char *test_user = NULL, *test_host = NULL, *test_addr = NULL; int remote_port; - char *line, *p, *cp; + char *fp, *line, *laddr, *logfile = NULL; int config_s[2] = { -1 , -1 }; + u_int n; u_int64_t ibytes, obytes; mode_t new_umask; Key *key; + Key *pubkey; + int keytype; Authctxt *authctxt; + struct connection_info *connection_info = get_connection_info(0, 0); #ifdef HAVE_STARTUP_NEEDS @@ -1822,6 +1969,8 @@ main(int ac, char **av) #endif /* WIN32_FIXME */ + + #ifdef HAVE_SECUREWARE (void)set_auth_parameters(ac, av); #endif @@ -1834,8 +1983,8 @@ main(int ac, char **av) for (i = 0; i < ac; i++) saved_argv[i] = xstrdup(av[i]); saved_argv[i] = NULL; - - #ifdef WIN32_FIXME + + #ifdef WIN32_FIXME /* * Create arguments for starting fake forked sshd.exe instances. @@ -1869,12 +2018,7 @@ main(int ac, char **av) /* Initialize configuration options to their default values. */ initialize_server_options(&options); - - - - - - + #ifdef WIN32_FIXME @@ -1888,12 +2032,12 @@ main(int ac, char **av) #endif - /* Parse command-line arguments. */ - while ((opt = getopt(ac, av, "f:p:b:k:h:g:u:o:C:dDeiqrtQRT46" FAKE_FORK_ARG)) != -1) { + while ((opt = getopt(ac, av, + "C:E:b:c:f:g:h:k:o:p:u:46DQRTdeiqrt" FAKE_FORK_ARG)) != -1) { switch (opt) { - - #ifdef WIN32_FIXME + +#ifdef WIN32_FIXME case '~': { debug("fake fork child"); @@ -1902,8 +2046,8 @@ main(int ac, char **av) break; } - #endif - +#endif + case '4': options.address_family = AF_INET; break; @@ -1931,6 +2075,9 @@ main(int ac, char **av) case 'D': no_daemon_flag = 1; break; + case 'E': + logfile = xstrdup(optarg); + /* FALLTHROUGH */ case 'e': log_stderr = 1; break; @@ -1983,7 +2130,7 @@ main(int ac, char **av) fprintf(stderr, "too many host keys.\n"); exit(1); } - options.host_key_files[options.num_host_key_files++] = + options.host_key_files[options.num_host_key_files++] = derelativise_path(optarg); break; case 't': @@ -1993,24 +2140,13 @@ main(int ac, char **av) test_flag = 2; break; case 'C': - cp = optarg; - while ((p = strsep(&cp, ",")) && *p != '\0') { - if (strncmp(p, "addr=", 5) == 0) - test_addr = xstrdup(p + 5); - else if (strncmp(p, "host=", 5) == 0) - test_host = xstrdup(p + 5); - else if (strncmp(p, "user=", 5) == 0) - test_user = xstrdup(p + 5); - else { - fprintf(stderr, "Invalid test " - "mode specification %s\n", p); - exit(1); - } - } + if (parse_server_match_testspec(connection_info, + optarg) == -1) + exit(1); break; case 'u': - utmp_len = (u_int)strtonum(optarg, 0, MAXHOSTNAMELEN+1, NULL); - if (utmp_len > MAXHOSTNAMELEN) { + utmp_len = (u_int)strtonum(optarg, 0, HOST_NAME_MAX+1+1, NULL); + if (utmp_len > HOST_NAME_MAX+1) { fprintf(stderr, "Invalid utmp length.\n"); exit(1); } @@ -2018,9 +2154,9 @@ main(int ac, char **av) case 'o': line = xstrdup(optarg); if (process_server_config_line(&options, line, - "command-line", 0, NULL, NULL, NULL, NULL) != 0) + "command-line", 0, NULL, NULL) != 0) exit(1); - xfree(line); + free(line); break; case '?': default: @@ -2028,7 +2164,7 @@ main(int ac, char **av) break; } } - + #ifdef WIN32_FIXME /* @@ -2200,13 +2336,19 @@ main(int ac, char **av) closefrom(REEXEC_DEVCRYPTO_RESERVED_FD); #endif +#ifdef WITH_OPENSSL OpenSSL_add_all_algorithms(); +#endif + /* If requested, redirect the logs to the specified logfile. */ + if (logfile != NULL) { + log_redirect_stderr_to(logfile); + free(logfile); + } /* * Force logging to stderr until we have loaded the private host * key (unless started from inetd) */ - log_init(__progname, options.log_level == SYSLOG_LEVEL_NOT_SET ? SYSLOG_LEVEL_INFO : options.log_level, @@ -2220,7 +2362,7 @@ main(int ac, char **av) */ #ifndef WIN32_FIXME if (getenv("KRB5CCNAME") != NULL) - unsetenv("KRB5CCNAME"); + (void) unsetenv("KRB5CCNAME"); #endif #ifdef _UNICOS @@ -2240,13 +2382,10 @@ main(int ac, char **av) * the parameters we need. If we're not doing an extended test, * do not silently ignore connection test params. */ - if (test_flag >= 2 && - (test_user != NULL || test_host != NULL || test_addr != NULL) - && (test_user == NULL || test_host == NULL || test_addr == NULL)) + if (test_flag >= 2 && server_match_spec_complete(connection_info) == 0) fatal("user, host and addr are all required when testing " "Match configs"); - if (test_flag < 2 && (test_user != NULL || test_host != NULL || - test_addr != NULL)) + if (test_flag < 2 && server_match_spec_complete(connection_info) >= 0) fatal("Config test connection parameter (-C) provided without " "test mode (-T)"); @@ -2254,17 +2393,17 @@ main(int ac, char **av) buffer_init(&cfg); if (rexeced_flag) recv_rexec_state(REEXEC_CONFIG_PASS_FD, &cfg); - else + else if (strcasecmp(config_file_name, "none") != 0) load_server_config(config_file_name, &cfg); parse_server_config(&options, rexeced_flag ? "rexec" : config_file_name, - &cfg, NULL, NULL, NULL); + &cfg, NULL); seed_rng(); /* Fill in default values for those options not explicitly set. */ fill_default_server_options(&options); - + #ifdef RUNTIME_LIBPAM if(options.use_pam) { @@ -2285,6 +2424,38 @@ main(int ac, char **av) if (options.challenge_response_authentication) options.kbd_interactive_authentication = 1; + /* Check that options are sensible */ + if (options.authorized_keys_command_user == NULL && + (options.authorized_keys_command != NULL && + strcasecmp(options.authorized_keys_command, "none") != 0)) + fatal("AuthorizedKeysCommand set without " + "AuthorizedKeysCommandUser"); + if (options.authorized_principals_command_user == NULL && + (options.authorized_principals_command != NULL && + strcasecmp(options.authorized_principals_command, "none") != 0)) + fatal("AuthorizedPrincipalsCommand set without " + "AuthorizedPrincipalsCommandUser"); + + /* + * Check whether there is any path through configured auth methods. + * Unfortunately it is not possible to verify this generally before + * daemonisation in the presence of Match block, but this catches + * and warns for trivial misconfigurations that could break login. + */ + if (options.num_auth_methods != 0) { + if ((options.protocol & SSH_PROTO_1)) + fatal("AuthenticationMethods is not supported with " + "SSH protocol 1"); + for (n = 0; n < options.num_auth_methods; n++) { + if (auth2_methods_valid(options.auth_methods[n], + 1) == 0) + break; + } + if (n >= options.num_auth_methods) + fatal("AuthenticationMethods cannot be satisfied by " + "enabled authentication methods"); + } + /* set default channel AF */ channel_set_af(options.address_family); @@ -2294,8 +2465,14 @@ main(int ac, char **av) exit(1); } - debug("sshd version %.100s", SSH_RELEASE); - + debug("sshd version %s, %s", SSH_VERSION, +#ifdef WITH_OPENSSL + SSLeay_version(SSLEAY_VERSION) +#else + "without OpenSSL" +#endif + ); + #ifdef WIN32_FIXME logit("[Build " __DATE__ " " __TIME__ "]"); #endif @@ -2306,29 +2483,57 @@ main(int ac, char **av) fatal("Privilege separation user %s does not exist", SSH_PRIVSEP_USER); } else { - memset(privsep_pw->pw_passwd, 0, strlen(privsep_pw->pw_passwd)); + explicit_bzero(privsep_pw->pw_passwd, + strlen(privsep_pw->pw_passwd)); privsep_pw = pwcopy(privsep_pw); - xfree(privsep_pw->pw_passwd); + free(privsep_pw->pw_passwd); privsep_pw->pw_passwd = xstrdup("*"); } endpwent(); - /* load private host keys */ + /* load host keys */ sensitive_data.host_keys = xcalloc(options.num_host_key_files, sizeof(Key *)); - for (i = 0; i < options.num_host_key_files; i++) - sensitive_data.host_keys[i] = NULL; + sensitive_data.host_pubkeys = xcalloc(options.num_host_key_files, + sizeof(Key *)); + + if (options.host_key_agent) { + if (strcmp(options.host_key_agent, SSH_AUTHSOCKET_ENV_NAME)) + setenv(SSH_AUTHSOCKET_ENV_NAME, + options.host_key_agent, 1); + if ((r = ssh_get_authentication_socket(NULL)) == 0) + have_agent = 1; + else + error("Could not connect to agent \"%s\": %s", + options.host_key_agent, ssh_err(r)); + } for (i = 0; i < options.num_host_key_files; i++) { + if (options.host_key_files[i] == NULL) + continue; key = key_load_private(options.host_key_files[i], "", NULL); + pubkey = key_load_public(options.host_key_files[i], NULL); + if (pubkey == NULL && key != NULL) + pubkey = key_demote(key); sensitive_data.host_keys[i] = key; - if (key == NULL) { + sensitive_data.host_pubkeys[i] = pubkey; + + if (key == NULL && pubkey != NULL && pubkey->type != KEY_RSA1 && + have_agent) { + debug("will rely on agent for hostkey %s", + options.host_key_files[i]); + keytype = pubkey->type; + } else if (key != NULL) { + keytype = key->type; + } else { error("Could not load host key: %s", options.host_key_files[i]); sensitive_data.host_keys[i] = NULL; + sensitive_data.host_pubkeys[i] = NULL; continue; } - switch (key->type) { + + switch (keytype) { case KEY_RSA1: sensitive_data.ssh1_host_key = key; sensitive_data.have_ssh1_key = 1; @@ -2336,11 +2541,18 @@ main(int ac, char **av) case KEY_RSA: case KEY_DSA: case KEY_ECDSA: - sensitive_data.have_ssh2_key = 1; + case KEY_ED25519: + if (have_agent || key != NULL) + sensitive_data.have_ssh2_key = 1; break; } - debug("private host key: #%d type %d %s", i, key->type, - key_type(key)); + if ((fp = sshkey_fingerprint(pubkey, options.fingerprint_hash, + SSH_FP_DEFAULT)) == NULL) + fatal("sshkey_fingerprint failed"); + debug("%s host key #%d: %s %s", + key ? "private" : "agent", i, keytype == KEY_RSA1 ? + sshkey_type(pubkey) : sshkey_ssh_name(pubkey), fp); + free(fp); } if ((options.protocol & SSH_PROTO_1) && !sensitive_data.have_ssh1_key) { logit("Disabling protocol version 1. Could not load host key"); @@ -2365,6 +2577,8 @@ main(int ac, char **av) sensitive_data.host_certificates[i] = NULL; for (i = 0; i < options.num_host_cert_files; i++) { + if (options.host_cert_files[i] == NULL) + continue; key = key_load_public(options.host_cert_files[i], NULL); if (key == NULL) { error("Could not load host certificate: %s", @@ -2395,10 +2609,12 @@ main(int ac, char **av) debug("host certificate: #%d type %d %s", j, key->type, key_type(key)); } + +#ifdef WITH_SSH1 /* Check certain values for sanity. */ if (options.protocol & SSH_PROTO_1) { - if (options.server_key_bits < 512 || - options.server_key_bits > 32768) { + if (options.server_key_bits < SSH_RSA_MINIMUM_MODULUS_SIZE || + options.server_key_bits > OPENSSL_RSA_MAX_MODULUS_BITS) { fprintf(stderr, "Bad server key size.\n"); exit(1); } @@ -2419,6 +2635,7 @@ main(int ac, char **av) options.server_key_bits); } } +#endif if (use_privsep) { struct stat st; @@ -2442,9 +2659,8 @@ main(int ac, char **av) } if (test_flag > 1) { - if (test_user != NULL && test_addr != NULL && test_host != NULL) - parse_server_match_config(&options, test_user, - test_host, test_addr); + if (server_match_spec_complete(connection_info) == 1) + parse_server_match_config(&options, connection_info); dump_config(&options); } @@ -2505,15 +2721,12 @@ main(int ac, char **av) #endif /* TIOCNOTTY */ } /* Reinitialize the log (because of the fork above). */ - log_init(__progname, options.log_level, options.log_facility, log_stderr); - /* Initialize the random number generator. */ - arc4random_stir(); - /* Chdir to the root directory so that the current disk can be unmounted if desired. */ - chdir("/"); + if (chdir("/") == -1) + error("chdir(\"/\"): %s", strerror(errno)); /* ignore SIGPIPE */ signal(SIGPIPE, SIG_IGN); @@ -2540,7 +2753,7 @@ main(int ac, char **av) * Write out the pid file after the sigterm handler * is setup and the listen sockets are bound */ - if (!debug_flag) { + if (options.pid_file != NULL && !debug_flag) { FILE *f = fopen(options.pid_file, "w"); if (f == NULL) { @@ -2551,7 +2764,6 @@ main(int ac, char **av) fclose(f); } } - #ifdef WIN32_FIXME if (!options.i_am_a_fake_fork) @@ -2586,10 +2798,11 @@ main(int ac, char **av) } #else + /* Accept a connection and return in a forked child */ server_accept_loop(&sock_in, &sock_out, &newsock, config_s); - #endif + #endif } /* This is the child processing a new connection. */ @@ -2622,13 +2835,14 @@ main(int ac, char **av) dup2(STDIN_FILENO, STDOUT_FILENO); if (startup_pipe == -1) close(REEXEC_STARTUP_PIPE_FD); - else + else if (startup_pipe != REEXEC_STARTUP_PIPE_FD) { dup2(startup_pipe, REEXEC_STARTUP_PIPE_FD); + close(startup_pipe); + startup_pipe = REEXEC_STARTUP_PIPE_FD; + } dup2(config_s[1], REEXEC_CONFIG_PASS_FD); close(config_s[1]); - if (startup_pipe != -1) - close(startup_pipe); execv(rexec_argv[0], rexec_argv); @@ -2639,8 +2853,6 @@ main(int ac, char **av) options.log_facility, log_stderr); /* Clean up fds */ - startup_pipe = REEXEC_STARTUP_PIPE_FD; - close(config_s[1]); close(REEXEC_CONFIG_PASS_FD); newsock = sock_out = sock_in = dup(STDIN_FILENO); if ((fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { @@ -2705,27 +2917,12 @@ main(int ac, char **av) #ifdef SSH_AUDIT_EVENTS audit_connection_from(remote_ip, remote_port); #endif -#ifdef LIBWRAP - allow_severity = options.log_facility|LOG_INFO; - deny_severity = options.log_facility|LOG_WARNING; - /* Check whether logins are denied from this host. */ - if (packet_connection_is_on_socket()) { - struct request_info req; - - request_init(&req, RQ_DAEMON, __progname, RQ_FILE, sock_in, 0); - fromhost(&req); - - if (!hosts_access(&req)) { - debug("Connection refused by tcp wrapper"); - refuse(&req); - /* NOTREACHED */ - fatal("libwrap refuse returns"); - } - } -#endif /* LIBWRAP */ /* Log the connection. */ - verbose("Connection from %.500s port %d", remote_ip, remote_port); + laddr = get_local_ipaddr(sock_in); + verbose("Connection from %s port %d on %s port %d", + remote_ip, remote_port, laddr, get_local_port()); + free(laddr); /* * We don't want to listen forever unless the other side @@ -2759,9 +2956,15 @@ main(int ac, char **av) buffer_init(&loginmsg); auth_debug_reset(); - if (use_privsep) + if (use_privsep) { if (privsep_preauth(authctxt) == 1) goto authenticated; + } else if (compat20 && have_agent) { + if ((r = ssh_get_authentication_socket(&auth_sock)) != 0) { + error("Unable to get agent socket: %s", ssh_err(r)); + have_agent = 0; + } + } /* perform the key exchange */ /* authenticate user and start session */ @@ -2769,8 +2972,12 @@ main(int ac, char **av) do_ssh2_kex(); do_authentication2(authctxt); } else { +#ifdef WITH_SSH1 do_ssh1_kex(); do_authentication(authctxt); +#else + fatal("ssh1 not supported"); +#endif } /* * If we use privilege separation, the unprivileged child transfers @@ -2799,12 +3006,14 @@ main(int ac, char **av) #endif #ifdef GSSAPI +#ifndef WIN32_FIXME if (options.gss_authentication) { temporarily_use_uid(authctxt->pw); ssh_gssapi_storecreds(); restore_uid(); } #endif +#endif #ifdef USE_PAM if (options.use_pam) { do_pam_setcred(1); @@ -2826,12 +3035,15 @@ main(int ac, char **av) packet_set_timeout(options.client_alive_interval, options.client_alive_count_max); + /* Try to send all our hostkeys to the client */ + if (compat20) + notify_hostkeys(active_state); + /* Start session. */ do_authenticated(authctxt); /* The connection has been terminated. */ - packet_get_state(MODE_IN, NULL, NULL, NULL, &ibytes); - packet_get_state(MODE_OUT, NULL, NULL, NULL, &obytes); + packet_get_bytes(&ibytes, &obytes); verbose("Transferred: sent %llu, received %llu bytes", (unsigned long long)obytes, (unsigned long long)ibytes); @@ -2854,6 +3066,7 @@ main(int ac, char **av) exit(0); } +#ifdef WITH_SSH1 /* * Decrypt session_key_int using our private server key and private host key * (key with larger modulus first). @@ -2877,10 +3090,10 @@ ssh1_session_key(BIGNUM *session_key_int) SSH_KEY_BITS_RESERVED); } if (rsa_private_decrypt(session_key_int, session_key_int, - sensitive_data.server_key->rsa) <= 0) + sensitive_data.server_key->rsa) != 0) rsafail++; if (rsa_private_decrypt(session_key_int, session_key_int, - sensitive_data.ssh1_host_key->rsa) <= 0) + sensitive_data.ssh1_host_key->rsa) != 0) rsafail++; } else { /* Host key has bigger modulus (or they are equal). */ @@ -2895,14 +3108,15 @@ ssh1_session_key(BIGNUM *session_key_int) SSH_KEY_BITS_RESERVED); } if (rsa_private_decrypt(session_key_int, session_key_int, - sensitive_data.ssh1_host_key->rsa) < 0) + sensitive_data.ssh1_host_key->rsa) != 0) rsafail++; if (rsa_private_decrypt(session_key_int, session_key_int, - sensitive_data.server_key->rsa) < 0) + sensitive_data.server_key->rsa) != 0) rsafail++; } return (rsafail); } + /* * SSH1 key exchange */ @@ -2911,8 +3125,10 @@ do_ssh1_kex(void) { int i, len; int rsafail = 0; - BIGNUM *session_key_int; + BIGNUM *session_key_int, *fake_key_int, *real_key_int; u_char session_key[SSH_SESSION_KEY_LENGTH]; + u_char fake_key_bytes[4096 / 8]; + size_t fake_key_len; u_char cookie[8]; u_int cipher_type, auth_mask, protocol_flags; @@ -2990,68 +3206,61 @@ do_ssh1_kex(void) debug("Encryption type: %.200s", cipher_name(cipher_type)); /* Get the encrypted integer. */ - if ((session_key_int = BN_new()) == NULL) + if ((real_key_int = BN_new()) == NULL) fatal("do_ssh1_kex: BN_new failed"); - packet_get_bignum(session_key_int); + packet_get_bignum(real_key_int); protocol_flags = packet_get_int(); packet_set_protocol_flags(protocol_flags); packet_check_eom(); - /* Decrypt session_key_int using host/server keys */ - rsafail = PRIVSEP(ssh1_session_key(session_key_int)); + /* Setup a fake key in case RSA decryption fails */ + if ((fake_key_int = BN_new()) == NULL) + fatal("do_ssh1_kex: BN_new failed"); + fake_key_len = BN_num_bytes(real_key_int); + if (fake_key_len > sizeof(fake_key_bytes)) + fake_key_len = sizeof(fake_key_bytes); + arc4random_buf(fake_key_bytes, fake_key_len); + if (BN_bin2bn(fake_key_bytes, fake_key_len, fake_key_int) == NULL) + fatal("do_ssh1_kex: BN_bin2bn failed"); + + /* Decrypt real_key_int using host/server keys */ + rsafail = PRIVSEP(ssh1_session_key(real_key_int)); + /* If decryption failed, use the fake key. Else, the real key. */ + if (rsafail) + session_key_int = fake_key_int; + else + session_key_int = real_key_int; /* * Extract session key from the decrypted integer. The key is in the * least significant 256 bits of the integer; the first byte of the * key is in the highest bits. */ - if (!rsafail) { - (void) BN_mask_bits(session_key_int, sizeof(session_key) * 8); - len = BN_num_bytes(session_key_int); - if (len < 0 || (u_int)len > sizeof(session_key)) { - error("do_ssh1_kex: bad session key len from %s: " - "session_key_int %d > sizeof(session_key) %lu", - get_remote_ipaddr(), len, (u_long)sizeof(session_key)); - rsafail++; - } else { - memset(session_key, 0, sizeof(session_key)); - BN_bn2bin(session_key_int, - session_key + sizeof(session_key) - len); + (void) BN_mask_bits(session_key_int, sizeof(session_key) * 8); + len = BN_num_bytes(session_key_int); + if (len < 0 || (u_int)len > sizeof(session_key)) { + error("do_ssh1_kex: bad session key len from %s: " + "session_key_int %d > sizeof(session_key) %lu", + get_remote_ipaddr(), len, (u_long)sizeof(session_key)); + rsafail++; + } else { + explicit_bzero(session_key, sizeof(session_key)); + BN_bn2bin(session_key_int, + session_key + sizeof(session_key) - len); - derive_ssh1_session_id( - sensitive_data.ssh1_host_key->rsa->n, - sensitive_data.server_key->rsa->n, - cookie, session_id); - /* - * Xor the first 16 bytes of the session key with the - * session id. - */ - for (i = 0; i < 16; i++) - session_key[i] ^= session_id[i]; - } - } - if (rsafail) { - int bytes = BN_num_bytes(session_key_int); - u_char *buf = xmalloc(bytes); - MD5_CTX md; - - logit("do_connection: generating a fake encryption key"); - BN_bn2bin(session_key_int, buf); - MD5_Init(&md); - MD5_Update(&md, buf, bytes); - MD5_Update(&md, sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH); - MD5_Final(session_key, &md); - MD5_Init(&md); - MD5_Update(&md, session_key, 16); - MD5_Update(&md, buf, bytes); - MD5_Update(&md, sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH); - MD5_Final(session_key + 16, &md); - memset(buf, 0, bytes); - xfree(buf); + derive_ssh1_session_id( + sensitive_data.ssh1_host_key->rsa->n, + sensitive_data.server_key->rsa->n, + cookie, session_id); + /* + * Xor the first 16 bytes of the session key with the + * session id. + */ for (i = 0; i < 16; i++) - session_id[i] = session_key[i] ^ session_key[i + 16]; + session_key[i] ^= session_id[i]; } + /* Destroy the private and public keys. No longer. */ destroy_sensitive_data(); @@ -3059,13 +3268,14 @@ do_ssh1_kex(void) mm_ssh1_session_id(session_id); /* Destroy the decrypted integer. It is no longer needed. */ - BN_clear_free(session_key_int); + BN_clear_free(real_key_int); + BN_clear_free(fake_key_int); /* Set the session key. From this on all communications will be encrypted. */ packet_set_encryption_key(session_key, SSH_SESSION_KEY_LENGTH, cipher_type); /* Destroy our copy of the session key. It is no longer needed. */ - memset(session_key, 0, sizeof(session_key)); + explicit_bzero(session_key, sizeof(session_key)); debug("Received session key; encryption turned on."); @@ -3074,28 +3284,51 @@ do_ssh1_kex(void) packet_send(); packet_write_wait(); } +#endif -/* - * SSH2 key exchange: diffie-hellman-group1-sha1 - */ +int +sshd_hostkey_sign(Key *privkey, Key *pubkey, u_char **signature, size_t *slen, + const u_char *data, size_t dlen, u_int flag) +{ + int r; + u_int xxx_slen, xxx_dlen = dlen; + + if (privkey) { + if (PRIVSEP(key_sign(privkey, signature, &xxx_slen, data, xxx_dlen) < 0)) + fatal("%s: key_sign failed", __func__); + if (slen) + *slen = xxx_slen; + } else if (use_privsep) { + if (mm_key_sign(pubkey, signature, &xxx_slen, data, xxx_dlen) < 0) + fatal("%s: pubkey_sign failed", __func__); + if (slen) + *slen = xxx_slen; + } else { + if ((r = ssh_agent_sign(auth_sock, pubkey, signature, slen, + data, dlen, datafellows)) != 0) + fatal("%s: ssh_agent_sign failed: %s", + __func__, ssh_err(r)); + } + return 0; +} + +/* SSH2 key exchange */ static void do_ssh2_kex(void) { - Kex *kex; + char *myproposal[PROPOSAL_MAX] = { KEX_SERVER }; + struct kex *kex; + int r; - if (options.ciphers != NULL) { - myproposal[PROPOSAL_ENC_ALGS_CTOS] = - myproposal[PROPOSAL_ENC_ALGS_STOC] = options.ciphers; - } - myproposal[PROPOSAL_ENC_ALGS_CTOS] = - compat_cipher_proposal(myproposal[PROPOSAL_ENC_ALGS_CTOS]); - myproposal[PROPOSAL_ENC_ALGS_STOC] = - compat_cipher_proposal(myproposal[PROPOSAL_ENC_ALGS_STOC]); + myproposal[PROPOSAL_KEX_ALGS] = compat_kex_proposal( + options.kex_algorithms); + myproposal[PROPOSAL_ENC_ALGS_CTOS] = compat_cipher_proposal( + options.ciphers); + myproposal[PROPOSAL_ENC_ALGS_STOC] = compat_cipher_proposal( + options.ciphers); + myproposal[PROPOSAL_MAC_ALGS_CTOS] = + myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; - if (options.macs != NULL) { - myproposal[PROPOSAL_MAC_ALGS_CTOS] = - myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs; - } if (options.compression == COMP_NONE) { myproposal[PROPOSAL_COMP_ALGS_CTOS] = myproposal[PROPOSAL_COMP_ALGS_STOC] = "none"; @@ -3103,28 +3336,37 @@ do_ssh2_kex(void) myproposal[PROPOSAL_COMP_ALGS_CTOS] = myproposal[PROPOSAL_COMP_ALGS_STOC] = "none,zlib@openssh.com"; } - if (options.kex_algorithms != NULL) - myproposal[PROPOSAL_KEX_ALGS] = options.kex_algorithms; - myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = list_hostkey_types(); + if (options.rekey_limit || options.rekey_interval) + packet_set_rekey_limits((u_int32_t)options.rekey_limit, + (time_t)options.rekey_interval); + + myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = compat_pkalg_proposal( + list_hostkey_types()); /* start key exchange */ - kex = kex_setup(myproposal); + if ((r = kex_setup(active_state, myproposal)) != 0) + fatal("kex_setup: %s", ssh_err(r)); + kex = active_state->kex; +#ifdef WITH_OPENSSL kex->kex[KEX_DH_GRP1_SHA1] = kexdh_server; kex->kex[KEX_DH_GRP14_SHA1] = kexdh_server; kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; +# ifdef OPENSSL_HAS_ECC kex->kex[KEX_ECDH_SHA2] = kexecdh_server; +# endif +#endif + kex->kex[KEX_C25519_SHA256] = kexc25519_server; kex->server = 1; kex->client_version_string=client_version_string; kex->server_version_string=server_version_string; kex->load_host_public_key=&get_hostkey_public_by_type; kex->load_host_private_key=&get_hostkey_private_by_type; kex->host_key_index=&get_hostkey_index; + kex->sign = sshd_hostkey_sign; - xxx_kex = kex; - - dispatch_run(DISPATCH_BLOCK, &kex->done, kex); + dispatch_run(DISPATCH_BLOCK, &kex->done, active_state); session_id2 = kex->session_id; session_id2_len = kex->session_id_len; @@ -3143,8 +3385,19 @@ do_ssh2_kex(void) void cleanup_exit(int i) { - if (the_authctxt) + if (the_authctxt) { do_cleanup(the_authctxt); +#ifndef WIN32_FIXME + if (use_privsep && privsep_is_preauth && + pmonitor != NULL && pmonitor->m_pid > 1) { + debug("Killing privsep child %d", pmonitor->m_pid); + if (kill(pmonitor->m_pid, SIGKILL) != 0 && + errno != ESRCH) + error("%s: kill(%d): %s", __func__, + pmonitor->m_pid, strerror(errno)); + } +#endif + } #ifdef SSH_AUDIT_EVENTS /* done after do_cleanup so it can cancel the PAM auth 'thread' */ if (!use_privsep || mm_is_monitor()) diff --git a/ssherr.c b/ssherr.c new file mode 100644 index 0000000..4ca7939 --- /dev/null +++ b/ssherr.c @@ -0,0 +1,141 @@ +/* $OpenBSD: ssherr.c,v 1.4 2015/02/16 22:13:32 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include "ssherr.h" + +const char * +ssh_err(int n) +{ + switch (n) { + case SSH_ERR_SUCCESS: + return "success"; + case SSH_ERR_INTERNAL_ERROR: + return "unexpected internal error"; + case SSH_ERR_ALLOC_FAIL: + return "memory allocation failed"; + case SSH_ERR_MESSAGE_INCOMPLETE: + return "incomplete message"; + case SSH_ERR_INVALID_FORMAT: + return "invalid format"; + case SSH_ERR_BIGNUM_IS_NEGATIVE: + return "bignum is negative"; + case SSH_ERR_STRING_TOO_LARGE: + return "string is too large"; + case SSH_ERR_BIGNUM_TOO_LARGE: + return "bignum is too large"; + case SSH_ERR_ECPOINT_TOO_LARGE: + return "elliptic curve point is too large"; + case SSH_ERR_NO_BUFFER_SPACE: + return "insufficient buffer space"; + case SSH_ERR_INVALID_ARGUMENT: + return "invalid argument"; + case SSH_ERR_KEY_BITS_MISMATCH: + return "key bits do not match"; + case SSH_ERR_EC_CURVE_INVALID: + return "invalid elliptic curve"; + case SSH_ERR_KEY_TYPE_MISMATCH: + return "key type does not match"; + case SSH_ERR_KEY_TYPE_UNKNOWN: + return "unknown or unsupported key type"; + case SSH_ERR_EC_CURVE_MISMATCH: + return "elliptic curve does not match"; + case SSH_ERR_EXPECTED_CERT: + return "plain key provided where certificate required"; + case SSH_ERR_KEY_LACKS_CERTBLOB: + return "key lacks certificate data"; + case SSH_ERR_KEY_CERT_UNKNOWN_TYPE: + return "unknown/unsupported certificate type"; + case SSH_ERR_KEY_CERT_INVALID_SIGN_KEY: + return "invalid certificate signing key"; + case SSH_ERR_KEY_INVALID_EC_VALUE: + return "invalid elliptic curve value"; + case SSH_ERR_SIGNATURE_INVALID: + return "incorrect signature"; + case SSH_ERR_LIBCRYPTO_ERROR: + return "error in libcrypto"; /* XXX fetch and return */ + case SSH_ERR_UNEXPECTED_TRAILING_DATA: + return "unexpected bytes remain after decoding"; + case SSH_ERR_SYSTEM_ERROR: + return strerror(errno); + case SSH_ERR_KEY_CERT_INVALID: + return "invalid certificate"; + case SSH_ERR_AGENT_COMMUNICATION: + return "communication with agent failed"; + case SSH_ERR_AGENT_FAILURE: + return "agent refused operation"; + case SSH_ERR_DH_GEX_OUT_OF_RANGE: + return "DH GEX group out of range"; + case SSH_ERR_DISCONNECTED: + return "disconnected"; + case SSH_ERR_MAC_INVALID: + return "message authentication code incorrect"; + case SSH_ERR_NO_CIPHER_ALG_MATCH: + return "no matching cipher found"; + case SSH_ERR_NO_MAC_ALG_MATCH: + return "no matching MAC found"; + case SSH_ERR_NO_COMPRESS_ALG_MATCH: + return "no matching compression method found"; + case SSH_ERR_NO_KEX_ALG_MATCH: + return "no matching key exchange method found"; + case SSH_ERR_NO_HOSTKEY_ALG_MATCH: + return "no matching host key type found"; + case SSH_ERR_PROTOCOL_MISMATCH: + return "protocol version mismatch"; + case SSH_ERR_NO_PROTOCOL_VERSION: + return "could not read protocol version"; + case SSH_ERR_NO_HOSTKEY_LOADED: + return "could not load host key"; + case SSH_ERR_NEED_REKEY: + return "rekeying not supported by peer"; + case SSH_ERR_PASSPHRASE_TOO_SHORT: + return "passphrase is too short (minimum four characters)"; + case SSH_ERR_FILE_CHANGED: + return "file changed while reading"; + case SSH_ERR_KEY_UNKNOWN_CIPHER: + return "key encrypted using unsupported cipher"; + case SSH_ERR_KEY_WRONG_PASSPHRASE: + return "incorrect passphrase supplied to decrypt private key"; + case SSH_ERR_KEY_BAD_PERMISSIONS: + return "bad permissions"; + case SSH_ERR_KEY_CERT_MISMATCH: + return "certificate does not match key"; + case SSH_ERR_KEY_NOT_FOUND: + return "key not found"; + case SSH_ERR_AGENT_NOT_PRESENT: + return "agent not present"; + case SSH_ERR_AGENT_NO_IDENTITIES: + return "agent contains no identities"; + case SSH_ERR_BUFFER_READ_ONLY: + return "internal error: buffer is read-only"; + case SSH_ERR_KRL_BAD_MAGIC: + return "KRL file has invalid magic number"; + case SSH_ERR_KEY_REVOKED: + return "Key is revoked"; + case SSH_ERR_CONN_CLOSED: + return "Connection closed"; + case SSH_ERR_CONN_TIMEOUT: + return "Connection timed out"; + case SSH_ERR_CONN_CORRUPT: + return "Connection corrupted"; + case SSH_ERR_PROTOCOL_ERROR: + return "Protocol error"; + default: + return "unknown error"; + } +} diff --git a/ssherr.h b/ssherr.h new file mode 100644 index 0000000..6f771b4 --- /dev/null +++ b/ssherr.h @@ -0,0 +1,84 @@ +/* $OpenBSD: ssherr.h,v 1.3 2015/01/30 01:13:33 djm Exp $ */ +/* + * Copyright (c) 2011 Damien Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _SSHERR_H +#define _SSHERR_H + +/* XXX are these too granular? not granular enough? I can't decide - djm */ + +/* Error codes */ +#define SSH_ERR_SUCCESS 0 +#define SSH_ERR_INTERNAL_ERROR -1 +#define SSH_ERR_ALLOC_FAIL -2 +#define SSH_ERR_MESSAGE_INCOMPLETE -3 +#define SSH_ERR_INVALID_FORMAT -4 +#define SSH_ERR_BIGNUM_IS_NEGATIVE -5 +#define SSH_ERR_STRING_TOO_LARGE -6 +#define SSH_ERR_BIGNUM_TOO_LARGE -7 +#define SSH_ERR_ECPOINT_TOO_LARGE -8 +#define SSH_ERR_NO_BUFFER_SPACE -9 +#define SSH_ERR_INVALID_ARGUMENT -10 +#define SSH_ERR_KEY_BITS_MISMATCH -11 +#define SSH_ERR_EC_CURVE_INVALID -12 +#define SSH_ERR_KEY_TYPE_MISMATCH -13 +#define SSH_ERR_KEY_TYPE_UNKNOWN -14 /* XXX UNSUPPORTED? */ +#define SSH_ERR_EC_CURVE_MISMATCH -15 +#define SSH_ERR_EXPECTED_CERT -16 +#define SSH_ERR_KEY_LACKS_CERTBLOB -17 +#define SSH_ERR_KEY_CERT_UNKNOWN_TYPE -18 +#define SSH_ERR_KEY_CERT_INVALID_SIGN_KEY -19 +#define SSH_ERR_KEY_INVALID_EC_VALUE -20 +#define SSH_ERR_SIGNATURE_INVALID -21 +#define SSH_ERR_LIBCRYPTO_ERROR -22 +#define SSH_ERR_UNEXPECTED_TRAILING_DATA -23 +#define SSH_ERR_SYSTEM_ERROR -24 +#define SSH_ERR_KEY_CERT_INVALID -25 +#define SSH_ERR_AGENT_COMMUNICATION -26 +#define SSH_ERR_AGENT_FAILURE -27 +#define SSH_ERR_DH_GEX_OUT_OF_RANGE -28 +#define SSH_ERR_DISCONNECTED -29 +#define SSH_ERR_MAC_INVALID -30 +#define SSH_ERR_NO_CIPHER_ALG_MATCH -31 +#define SSH_ERR_NO_MAC_ALG_MATCH -32 +#define SSH_ERR_NO_COMPRESS_ALG_MATCH -33 +#define SSH_ERR_NO_KEX_ALG_MATCH -34 +#define SSH_ERR_NO_HOSTKEY_ALG_MATCH -35 +#define SSH_ERR_NO_HOSTKEY_LOADED -36 +#define SSH_ERR_PROTOCOL_MISMATCH -37 +#define SSH_ERR_NO_PROTOCOL_VERSION -38 +#define SSH_ERR_NEED_REKEY -39 +#define SSH_ERR_PASSPHRASE_TOO_SHORT -40 +#define SSH_ERR_FILE_CHANGED -41 +#define SSH_ERR_KEY_UNKNOWN_CIPHER -42 +#define SSH_ERR_KEY_WRONG_PASSPHRASE -43 +#define SSH_ERR_KEY_BAD_PERMISSIONS -44 +#define SSH_ERR_KEY_CERT_MISMATCH -45 +#define SSH_ERR_KEY_NOT_FOUND -46 +#define SSH_ERR_AGENT_NOT_PRESENT -47 +#define SSH_ERR_AGENT_NO_IDENTITIES -48 +#define SSH_ERR_BUFFER_READ_ONLY -49 +#define SSH_ERR_KRL_BAD_MAGIC -50 +#define SSH_ERR_KEY_REVOKED -51 +#define SSH_ERR_CONN_CLOSED -52 +#define SSH_ERR_CONN_TIMEOUT -53 +#define SSH_ERR_CONN_CORRUPT -54 +#define SSH_ERR_PROTOCOL_ERROR -55 + +/* Translate a numeric error code to a human-readable error string */ +const char *ssh_err(int n); + +#endif /* _SSHERR_H */ diff --git a/sshkey.c b/sshkey.c new file mode 100644 index 0000000..32dd8f2 --- /dev/null +++ b/sshkey.c @@ -0,0 +1,3895 @@ +/* $OpenBSD: sshkey.c,v 1.21 2015/08/19 23:19:01 djm Exp $ */ +/* + * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. + * Copyright (c) 2008 Alexander von Gernler. All rights reserved. + * Copyright (c) 2010,2011 Damien Miller. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include /* MIN MAX */ +#include +#include + +#ifdef WITH_OPENSSL +#include +#include +#include +#endif + +#include "crypto_api.h" + +#include +#include +#include +#include +#include +#ifdef HAVE_UTIL_H +#include +#endif /* HAVE_UTIL_H */ + +#include "ssh2.h" +#include "ssherr.h" +#include "misc.h" +#include "sshbuf.h" +#include "rsa.h" +#include "cipher.h" +#include "digest.h" +#define SSHKEY_INTERNAL +#include "sshkey.h" +#include "match.h" + +/* openssh private key file format */ +#define MARK_BEGIN "-----BEGIN OPENSSH PRIVATE KEY-----\n" +#define MARK_END "-----END OPENSSH PRIVATE KEY-----\n" +#define MARK_BEGIN_LEN (sizeof(MARK_BEGIN) - 1) +#define MARK_END_LEN (sizeof(MARK_END) - 1) +#define KDFNAME "bcrypt" +#define AUTH_MAGIC "openssh-key-v1" +#define SALT_LEN 16 +#define DEFAULT_CIPHERNAME "aes256-cbc" +#define DEFAULT_ROUNDS 16 + +/* Version identification string for SSH v1 identity files. */ +#define LEGACY_BEGIN "SSH PRIVATE KEY FILE FORMAT 1.1\n" + +static int sshkey_from_blob_internal(struct sshbuf *buf, + struct sshkey **keyp, int allow_cert); + +/* Supported key types */ +struct keytype { + const char *name; + const char *shortname; + int type; + int nid; + int cert; +}; +static const struct keytype keytypes[] = { + { "ssh-ed25519", "ED25519", KEY_ED25519, 0, 0 }, + { "ssh-ed25519-cert-v01@openssh.com", "ED25519-CERT", + KEY_ED25519_CERT, 0, 1 }, +#ifdef WITH_OPENSSL + { NULL, "RSA1", KEY_RSA1, 0, 0 }, + { "ssh-rsa", "RSA", KEY_RSA, 0, 0 }, + { "ssh-dss", "DSA", KEY_DSA, 0, 0 }, +# ifdef OPENSSL_HAS_ECC + { "ecdsa-sha2-nistp256", "ECDSA", KEY_ECDSA, NID_X9_62_prime256v1, 0 }, + { "ecdsa-sha2-nistp384", "ECDSA", KEY_ECDSA, NID_secp384r1, 0 }, +# ifdef OPENSSL_HAS_NISTP521 + { "ecdsa-sha2-nistp521", "ECDSA", KEY_ECDSA, NID_secp521r1, 0 }, +# endif /* OPENSSL_HAS_NISTP521 */ +# endif /* OPENSSL_HAS_ECC */ + { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", KEY_RSA_CERT, 0, 1 }, + { "ssh-dss-cert-v01@openssh.com", "DSA-CERT", KEY_DSA_CERT, 0, 1 }, +# ifdef OPENSSL_HAS_ECC + { "ecdsa-sha2-nistp256-cert-v01@openssh.com", "ECDSA-CERT", + KEY_ECDSA_CERT, NID_X9_62_prime256v1, 1 }, + { "ecdsa-sha2-nistp384-cert-v01@openssh.com", "ECDSA-CERT", + KEY_ECDSA_CERT, NID_secp384r1, 1 }, +# ifdef OPENSSL_HAS_NISTP521 + { "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", + KEY_ECDSA_CERT, NID_secp521r1, 1 }, +# endif /* OPENSSL_HAS_NISTP521 */ +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + { NULL, NULL, -1, -1, 0 } +}; + +const char * +sshkey_type(const struct sshkey *k) +{ + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->type == k->type) + return kt->shortname; + } + return "unknown"; +} + +static const char * +sshkey_ssh_name_from_type_nid(int type, int nid) +{ + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->type == type && (kt->nid == 0 || kt->nid == nid)) + return kt->name; + } + return "ssh-unknown"; +} + +int +sshkey_type_is_cert(int type) +{ + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->type == type) + return kt->cert; + } + return 0; +} + +const char * +sshkey_ssh_name(const struct sshkey *k) +{ + return sshkey_ssh_name_from_type_nid(k->type, k->ecdsa_nid); +} + +const char * +sshkey_ssh_name_plain(const struct sshkey *k) +{ + return sshkey_ssh_name_from_type_nid(sshkey_type_plain(k->type), + k->ecdsa_nid); +} + +int +sshkey_type_from_name(const char *name) +{ + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + /* Only allow shortname matches for plain key types */ + if ((kt->name != NULL && strcmp(name, kt->name) == 0) || + (!kt->cert && strcasecmp(kt->shortname, name) == 0)) + return kt->type; + } + return KEY_UNSPEC; +} + +int +sshkey_ecdsa_nid_from_name(const char *name) +{ + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->type != KEY_ECDSA && kt->type != KEY_ECDSA_CERT) + continue; + if (kt->name != NULL && strcmp(name, kt->name) == 0) + return kt->nid; + } + return -1; +} + +char * +key_alg_list(int certs_only, int plain_only) +{ + char *tmp, *ret = NULL; + size_t nlen, rlen = 0; + const struct keytype *kt; + + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->name == NULL) + continue; + if ((certs_only && !kt->cert) || (plain_only && kt->cert)) + continue; + if (ret != NULL) + ret[rlen++] = '\n'; + nlen = strlen(kt->name); + if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) { + free(ret); + return NULL; + } + ret = tmp; + memcpy(ret + rlen, kt->name, nlen + 1); + rlen += nlen; + } + return ret; +} + +int +sshkey_names_valid2(const char *names, int allow_wildcard) +{ + char *s, *cp, *p; + const struct keytype *kt; + int type; + + if (names == NULL || strcmp(names, "") == 0) + return 0; + if ((s = cp = strdup(names)) == NULL) + return 0; + for ((p = strsep(&cp, ",")); p && *p != '\0'; + (p = strsep(&cp, ","))) { + type = sshkey_type_from_name(p); + if (type == KEY_RSA1) { + free(s); + return 0; + } + if (type == KEY_UNSPEC) { + if (allow_wildcard) { + /* + * Try matching key types against the string. + * If any has a positive or negative match then + * the component is accepted. + */ + for (kt = keytypes; kt->type != -1; kt++) { + if (kt->type == KEY_RSA1) + continue; + if (match_pattern_list(kt->name, + p, 0) != 0) + break; + } + if (kt->type != -1) + continue; + } + free(s); + return 0; + } + } + free(s); + return 1; +} + +u_int +sshkey_size(const struct sshkey *k) +{ + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA1: + case KEY_RSA: + case KEY_RSA_CERT: + return BN_num_bits(k->rsa->n); + case KEY_DSA: + case KEY_DSA_CERT: + return BN_num_bits(k->dsa->p); + case KEY_ECDSA: + case KEY_ECDSA_CERT: + return sshkey_curve_nid_to_bits(k->ecdsa_nid); +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + return 256; /* XXX */ + } + return 0; +} + +static int +sshkey_type_is_valid_ca(int type) +{ + switch (type) { + case KEY_RSA: + case KEY_DSA: + case KEY_ECDSA: + case KEY_ED25519: + return 1; + default: + return 0; + } +} + +int +sshkey_is_cert(const struct sshkey *k) +{ + if (k == NULL) + return 0; + return sshkey_type_is_cert(k->type); +} + +/* Return the cert-less equivalent to a certified key type */ +int +sshkey_type_plain(int type) +{ + switch (type) { + case KEY_RSA_CERT: + return KEY_RSA; + case KEY_DSA_CERT: + return KEY_DSA; + case KEY_ECDSA_CERT: + return KEY_ECDSA; + case KEY_ED25519_CERT: + return KEY_ED25519; + default: + return type; + } +} + +#ifdef WITH_OPENSSL +/* XXX: these are really begging for a table-driven approach */ +int +sshkey_curve_name_to_nid(const char *name) +{ + if (strcmp(name, "nistp256") == 0) + return NID_X9_62_prime256v1; + else if (strcmp(name, "nistp384") == 0) + return NID_secp384r1; +# ifdef OPENSSL_HAS_NISTP521 + else if (strcmp(name, "nistp521") == 0) + return NID_secp521r1; +# endif /* OPENSSL_HAS_NISTP521 */ + else + return -1; +} + +u_int +sshkey_curve_nid_to_bits(int nid) +{ + switch (nid) { + case NID_X9_62_prime256v1: + return 256; + case NID_secp384r1: + return 384; +# ifdef OPENSSL_HAS_NISTP521 + case NID_secp521r1: + return 521; +# endif /* OPENSSL_HAS_NISTP521 */ + default: + return 0; + } +} + +int +sshkey_ecdsa_bits_to_nid(int bits) +{ + switch (bits) { + case 256: + return NID_X9_62_prime256v1; + case 384: + return NID_secp384r1; +# ifdef OPENSSL_HAS_NISTP521 + case 521: + return NID_secp521r1; +# endif /* OPENSSL_HAS_NISTP521 */ + default: + return -1; + } +} + +const char * +sshkey_curve_nid_to_name(int nid) +{ + switch (nid) { + case NID_X9_62_prime256v1: + return "nistp256"; + case NID_secp384r1: + return "nistp384"; +# ifdef OPENSSL_HAS_NISTP521 + case NID_secp521r1: + return "nistp521"; +# endif /* OPENSSL_HAS_NISTP521 */ + default: + return NULL; + } +} + +int +sshkey_ec_nid_to_hash_alg(int nid) +{ + int kbits = sshkey_curve_nid_to_bits(nid); + + if (kbits <= 0) + return -1; + + /* RFC5656 section 6.2.1 */ + if (kbits <= 256) + return SSH_DIGEST_SHA256; + else if (kbits <= 384) + return SSH_DIGEST_SHA384; + else + return SSH_DIGEST_SHA512; +} +#endif /* WITH_OPENSSL */ + +static void +cert_free(struct sshkey_cert *cert) +{ + u_int i; + + if (cert == NULL) + return; + if (cert->certblob != NULL) + sshbuf_free(cert->certblob); + if (cert->critical != NULL) + sshbuf_free(cert->critical); + if (cert->extensions != NULL) + sshbuf_free(cert->extensions); + if (cert->key_id != NULL) + free(cert->key_id); + for (i = 0; i < cert->nprincipals; i++) + free(cert->principals[i]); + if (cert->principals != NULL) + free(cert->principals); + if (cert->signature_key != NULL) + sshkey_free(cert->signature_key); + explicit_bzero(cert, sizeof(*cert)); + free(cert); +} + +static struct sshkey_cert * +cert_new(void) +{ + struct sshkey_cert *cert; + + if ((cert = calloc(1, sizeof(*cert))) == NULL) + return NULL; + if ((cert->certblob = sshbuf_new()) == NULL || + (cert->critical = sshbuf_new()) == NULL || + (cert->extensions = sshbuf_new()) == NULL) { + cert_free(cert); + return NULL; + } + cert->key_id = NULL; + cert->principals = NULL; + cert->signature_key = NULL; + return cert; +} + +struct sshkey * +sshkey_new(int type) +{ + struct sshkey *k; +#ifdef WITH_OPENSSL + RSA *rsa; + DSA *dsa; +#endif /* WITH_OPENSSL */ + + if ((k = calloc(1, sizeof(*k))) == NULL) + return NULL; + k->type = type; + k->ecdsa = NULL; + k->ecdsa_nid = -1; + k->dsa = NULL; + k->rsa = NULL; + k->cert = NULL; + k->ed25519_sk = NULL; + k->ed25519_pk = NULL; + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA1: + case KEY_RSA: + case KEY_RSA_CERT: + if ((rsa = RSA_new()) == NULL || + (rsa->n = BN_new()) == NULL || + (rsa->e = BN_new()) == NULL) { + if (rsa != NULL) + RSA_free(rsa); + free(k); + return NULL; + } + k->rsa = rsa; + break; + case KEY_DSA: + case KEY_DSA_CERT: + if ((dsa = DSA_new()) == NULL || + (dsa->p = BN_new()) == NULL || + (dsa->q = BN_new()) == NULL || + (dsa->g = BN_new()) == NULL || + (dsa->pub_key = BN_new()) == NULL) { + if (dsa != NULL) + DSA_free(dsa); + free(k); + return NULL; + } + k->dsa = dsa; + break; + case KEY_ECDSA: + case KEY_ECDSA_CERT: + /* Cannot do anything until we know the group */ + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + /* no need to prealloc */ + break; + case KEY_UNSPEC: + break; + default: + free(k); + return NULL; + break; + } + + if (sshkey_is_cert(k)) { + if ((k->cert = cert_new()) == NULL) { + sshkey_free(k); + return NULL; + } + } + + return k; +} + +int +sshkey_add_private(struct sshkey *k) +{ + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA1: + case KEY_RSA: + case KEY_RSA_CERT: +#define bn_maybe_alloc_failed(p) (p == NULL && (p = BN_new()) == NULL) + if (bn_maybe_alloc_failed(k->rsa->d) || + bn_maybe_alloc_failed(k->rsa->iqmp) || + bn_maybe_alloc_failed(k->rsa->q) || + bn_maybe_alloc_failed(k->rsa->p) || + bn_maybe_alloc_failed(k->rsa->dmq1) || + bn_maybe_alloc_failed(k->rsa->dmp1)) + return SSH_ERR_ALLOC_FAIL; + break; + case KEY_DSA: + case KEY_DSA_CERT: + if (bn_maybe_alloc_failed(k->dsa->priv_key)) + return SSH_ERR_ALLOC_FAIL; + break; +#undef bn_maybe_alloc_failed + case KEY_ECDSA: + case KEY_ECDSA_CERT: + /* Cannot do anything until we know the group */ + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + /* no need to prealloc */ + break; + case KEY_UNSPEC: + break; + default: + return SSH_ERR_INVALID_ARGUMENT; + } + return 0; +} + +struct sshkey * +sshkey_new_private(int type) +{ + struct sshkey *k = sshkey_new(type); + + if (k == NULL) + return NULL; + if (sshkey_add_private(k) != 0) { + sshkey_free(k); + return NULL; + } + return k; +} + +void +sshkey_free(struct sshkey *k) +{ + if (k == NULL) + return; + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA1: + case KEY_RSA: + case KEY_RSA_CERT: + if (k->rsa != NULL) + RSA_free(k->rsa); + k->rsa = NULL; + break; + case KEY_DSA: + case KEY_DSA_CERT: + if (k->dsa != NULL) + DSA_free(k->dsa); + k->dsa = NULL; + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + case KEY_ECDSA_CERT: + if (k->ecdsa != NULL) + EC_KEY_free(k->ecdsa); + k->ecdsa = NULL; + break; +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + if (k->ed25519_pk) { + explicit_bzero(k->ed25519_pk, ED25519_PK_SZ); + free(k->ed25519_pk); + k->ed25519_pk = NULL; + } + if (k->ed25519_sk) { + explicit_bzero(k->ed25519_sk, ED25519_SK_SZ); + free(k->ed25519_sk); + k->ed25519_sk = NULL; + } + break; + case KEY_UNSPEC: + break; + default: + break; + } + if (sshkey_is_cert(k)) + cert_free(k->cert); + explicit_bzero(k, sizeof(*k)); + free(k); +} + +static int +cert_compare(struct sshkey_cert *a, struct sshkey_cert *b) +{ + if (a == NULL && b == NULL) + return 1; + if (a == NULL || b == NULL) + return 0; + if (sshbuf_len(a->certblob) != sshbuf_len(b->certblob)) + return 0; + if (timingsafe_bcmp(sshbuf_ptr(a->certblob), sshbuf_ptr(b->certblob), + sshbuf_len(a->certblob)) != 0) + return 0; + return 1; +} + +/* + * Compare public portions of key only, allowing comparisons between + * certificates and plain keys too. + */ +int +sshkey_equal_public(const struct sshkey *a, const struct sshkey *b) +{ +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) + BN_CTX *bnctx; +#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */ + + if (a == NULL || b == NULL || + sshkey_type_plain(a->type) != sshkey_type_plain(b->type)) + return 0; + + switch (a->type) { +#ifdef WITH_OPENSSL + case KEY_RSA1: + case KEY_RSA_CERT: + case KEY_RSA: + return a->rsa != NULL && b->rsa != NULL && + BN_cmp(a->rsa->e, b->rsa->e) == 0 && + BN_cmp(a->rsa->n, b->rsa->n) == 0; + case KEY_DSA_CERT: + case KEY_DSA: + return a->dsa != NULL && b->dsa != NULL && + BN_cmp(a->dsa->p, b->dsa->p) == 0 && + BN_cmp(a->dsa->q, b->dsa->q) == 0 && + BN_cmp(a->dsa->g, b->dsa->g) == 0 && + BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA_CERT: + case KEY_ECDSA: + if (a->ecdsa == NULL || b->ecdsa == NULL || + EC_KEY_get0_public_key(a->ecdsa) == NULL || + EC_KEY_get0_public_key(b->ecdsa) == NULL) + return 0; + if ((bnctx = BN_CTX_new()) == NULL) + return 0; + if (EC_GROUP_cmp(EC_KEY_get0_group(a->ecdsa), + EC_KEY_get0_group(b->ecdsa), bnctx) != 0 || + EC_POINT_cmp(EC_KEY_get0_group(a->ecdsa), + EC_KEY_get0_public_key(a->ecdsa), + EC_KEY_get0_public_key(b->ecdsa), bnctx) != 0) { + BN_CTX_free(bnctx); + return 0; + } + BN_CTX_free(bnctx); + return 1; +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + return a->ed25519_pk != NULL && b->ed25519_pk != NULL && + memcmp(a->ed25519_pk, b->ed25519_pk, ED25519_PK_SZ) == 0; + default: + return 0; + } + /* NOTREACHED */ +} + +int +sshkey_equal(const struct sshkey *a, const struct sshkey *b) +{ + if (a == NULL || b == NULL || a->type != b->type) + return 0; + if (sshkey_is_cert(a)) { + if (!cert_compare(a->cert, b->cert)) + return 0; + } + return sshkey_equal_public(a, b); +} + +static int +to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain) +{ + int type, ret = SSH_ERR_INTERNAL_ERROR; + const char *typename; + + if (key == NULL) + return SSH_ERR_INVALID_ARGUMENT; + + if (sshkey_is_cert(key)) { + if (key->cert == NULL) + return SSH_ERR_EXPECTED_CERT; + if (sshbuf_len(key->cert->certblob) == 0) + return SSH_ERR_KEY_LACKS_CERTBLOB; + } + type = force_plain ? sshkey_type_plain(key->type) : key->type; + typename = sshkey_ssh_name_from_type_nid(type, key->ecdsa_nid); + + switch (type) { +#ifdef WITH_OPENSSL + case KEY_DSA_CERT: + case KEY_ECDSA_CERT: + case KEY_RSA_CERT: +#endif /* WITH_OPENSSL */ + case KEY_ED25519_CERT: + /* Use the existing blob */ + /* XXX modified flag? */ + if ((ret = sshbuf_putb(b, key->cert->certblob)) != 0) + return ret; + break; +#ifdef WITH_OPENSSL + case KEY_DSA: + if (key->dsa == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if ((ret = sshbuf_put_cstring(b, typename)) != 0 || + (ret = sshbuf_put_bignum2(b, key->dsa->p)) != 0 || + (ret = sshbuf_put_bignum2(b, key->dsa->q)) != 0 || + (ret = sshbuf_put_bignum2(b, key->dsa->g)) != 0 || + (ret = sshbuf_put_bignum2(b, key->dsa->pub_key)) != 0) + return ret; + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + if (key->ecdsa == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if ((ret = sshbuf_put_cstring(b, typename)) != 0 || + (ret = sshbuf_put_cstring(b, + sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 || + (ret = sshbuf_put_eckey(b, key->ecdsa)) != 0) + return ret; + break; +# endif + case KEY_RSA: + if (key->rsa == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if ((ret = sshbuf_put_cstring(b, typename)) != 0 || + (ret = sshbuf_put_bignum2(b, key->rsa->e)) != 0 || + (ret = sshbuf_put_bignum2(b, key->rsa->n)) != 0) + return ret; + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + if (key->ed25519_pk == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if ((ret = sshbuf_put_cstring(b, typename)) != 0 || + (ret = sshbuf_put_string(b, + key->ed25519_pk, ED25519_PK_SZ)) != 0) + return ret; + break; + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } + return 0; +} + +int +sshkey_putb(const struct sshkey *key, struct sshbuf *b) +{ + return to_blob_buf(key, b, 0); +} + +int +sshkey_puts(const struct sshkey *key, struct sshbuf *b) +{ + struct sshbuf *tmp; + int r; + + if ((tmp = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + r = to_blob_buf(key, tmp, 0); + if (r == 0) + r = sshbuf_put_stringb(b, tmp); + sshbuf_free(tmp); + return r; +} + +int +sshkey_putb_plain(const struct sshkey *key, struct sshbuf *b) +{ + return to_blob_buf(key, b, 1); +} + +static int +to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp, int force_plain) +{ + int ret = SSH_ERR_INTERNAL_ERROR; + size_t len; + struct sshbuf *b = NULL; + + if (lenp != NULL) + *lenp = 0; + if (blobp != NULL) + *blobp = NULL; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((ret = to_blob_buf(key, b, force_plain)) != 0) + goto out; + len = sshbuf_len(b); + if (lenp != NULL) + *lenp = len; + if (blobp != NULL) { + if ((*blobp = malloc(len)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + memcpy(*blobp, sshbuf_ptr(b), len); + } + ret = 0; + out: + sshbuf_free(b); + return ret; +} + +int +sshkey_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp) +{ + return to_blob(key, blobp, lenp, 0); +} + +int +sshkey_plain_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp) +{ + return to_blob(key, blobp, lenp, 1); +} + +int +sshkey_fingerprint_raw(const struct sshkey *k, int dgst_alg, + u_char **retp, size_t *lenp) +{ + u_char *blob = NULL, *ret = NULL; + size_t blob_len = 0; + int r = SSH_ERR_INTERNAL_ERROR; + + if (retp != NULL) + *retp = NULL; + if (lenp != NULL) + *lenp = 0; + if (ssh_digest_bytes(dgst_alg) == 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + + if (k->type == KEY_RSA1) { +#ifdef WITH_OPENSSL + int nlen = BN_num_bytes(k->rsa->n); + int elen = BN_num_bytes(k->rsa->e); + + blob_len = nlen + elen; + if (nlen >= INT_MAX - elen || + (blob = malloc(blob_len)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + BN_bn2bin(k->rsa->n, blob); + BN_bn2bin(k->rsa->e, blob + nlen); +#endif /* WITH_OPENSSL */ + } else if ((r = to_blob(k, &blob, &blob_len, 1)) != 0) + goto out; + if ((ret = calloc(1, SSH_DIGEST_MAX_LENGTH)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = ssh_digest_memory(dgst_alg, blob, blob_len, + ret, SSH_DIGEST_MAX_LENGTH)) != 0) + goto out; + /* success */ + if (retp != NULL) { + *retp = ret; + ret = NULL; + } + if (lenp != NULL) + *lenp = ssh_digest_bytes(dgst_alg); + r = 0; + out: + free(ret); + if (blob != NULL) { + explicit_bzero(blob, blob_len); + free(blob); + } + return r; +} + +static char * +fingerprint_b64(const char *alg, u_char *dgst_raw, size_t dgst_raw_len) +{ + char *ret; + size_t plen = strlen(alg) + 1; + size_t rlen = ((dgst_raw_len + 2) / 3) * 4 + plen + 1; + int r; + + if (dgst_raw_len > 65536 || (ret = calloc(1, rlen)) == NULL) + return NULL; + strlcpy(ret, alg, rlen); + strlcat(ret, ":", rlen); + if (dgst_raw_len == 0) + return ret; + if ((r = b64_ntop(dgst_raw, dgst_raw_len, + ret + plen, rlen - plen)) == -1) { + explicit_bzero(ret, rlen); + free(ret); + return NULL; + } + /* Trim padding characters from end */ + ret[strcspn(ret, "=")] = '\0'; + return ret; +} + +static char * +fingerprint_hex(const char *alg, u_char *dgst_raw, size_t dgst_raw_len) +{ + char *retval, hex[5]; + size_t i, rlen = dgst_raw_len * 3 + strlen(alg) + 2; + + if (dgst_raw_len > 65536 || (retval = calloc(1, rlen)) == NULL) + return NULL; + strlcpy(retval, alg, rlen); + strlcat(retval, ":", rlen); + for (i = 0; i < dgst_raw_len; i++) { + snprintf(hex, sizeof(hex), "%s%02x", + i > 0 ? ":" : "", dgst_raw[i]); + strlcat(retval, hex, rlen); + } + return retval; +} + +static char * +fingerprint_bubblebabble(u_char *dgst_raw, size_t dgst_raw_len) +{ + char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' }; + char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm', + 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' }; + u_int i, j = 0, rounds, seed = 1; + char *retval; + + rounds = (dgst_raw_len / 2) + 1; + if ((retval = calloc(rounds, 6)) == NULL) + return NULL; + retval[j++] = 'x'; + for (i = 0; i < rounds; i++) { + u_int idx0, idx1, idx2, idx3, idx4; + if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) { + idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) + + seed) % 6; + idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15; + idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) + + (seed / 6)) % 6; + retval[j++] = vowels[idx0]; + retval[j++] = consonants[idx1]; + retval[j++] = vowels[idx2]; + if ((i + 1) < rounds) { + idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15; + idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15; + retval[j++] = consonants[idx3]; + retval[j++] = '-'; + retval[j++] = consonants[idx4]; + seed = ((seed * 5) + + ((((u_int)(dgst_raw[2 * i])) * 7) + + ((u_int)(dgst_raw[(2 * i) + 1])))) % 36; + } + } else { + idx0 = seed % 6; + idx1 = 16; + idx2 = seed / 6; + retval[j++] = vowels[idx0]; + retval[j++] = consonants[idx1]; + retval[j++] = vowels[idx2]; + } + } + retval[j++] = 'x'; + retval[j++] = '\0'; + return retval; +} + +/* + * Draw an ASCII-Art representing the fingerprint so human brain can + * profit from its built-in pattern recognition ability. + * This technique is called "random art" and can be found in some + * scientific publications like this original paper: + * + * "Hash Visualization: a New Technique to improve Real-World Security", + * Perrig A. and Song D., 1999, International Workshop on Cryptographic + * Techniques and E-Commerce (CrypTEC '99) + * sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf + * + * The subject came up in a talk by Dan Kaminsky, too. + * + * If you see the picture is different, the key is different. + * If the picture looks the same, you still know nothing. + * + * The algorithm used here is a worm crawling over a discrete plane, + * leaving a trace (augmenting the field) everywhere it goes. + * Movement is taken from dgst_raw 2bit-wise. Bumping into walls + * makes the respective movement vector be ignored for this turn. + * Graphs are not unambiguous, because circles in graphs can be + * walked in either direction. + */ + +/* + * Field sizes for the random art. Have to be odd, so the starting point + * can be in the exact middle of the picture, and FLDBASE should be >=8 . + * Else pictures would be too dense, and drawing the frame would + * fail, too, because the key type would not fit in anymore. + */ +#define FLDBASE 8 +#define FLDSIZE_Y (FLDBASE + 1) +#define FLDSIZE_X (FLDBASE * 2 + 1) +static char * +fingerprint_randomart(const char *alg, u_char *dgst_raw, size_t dgst_raw_len, + const struct sshkey *k) +{ + /* + * Chars to be used after each other every time the worm + * intersects with itself. Matter of taste. + */ + char *augmentation_string = " .o+=*BOX@%&#/^SE"; + char *retval, *p, title[FLDSIZE_X], hash[FLDSIZE_X]; + u_char field[FLDSIZE_X][FLDSIZE_Y]; + size_t i, tlen, hlen; + u_int b; + int x, y, r; + size_t len = strlen(augmentation_string) - 1; + + if ((retval = calloc((FLDSIZE_X + 3), (FLDSIZE_Y + 2))) == NULL) + return NULL; + + /* initialize field */ + memset(field, 0, FLDSIZE_X * FLDSIZE_Y * sizeof(char)); + x = FLDSIZE_X / 2; + y = FLDSIZE_Y / 2; + + /* process raw key */ + for (i = 0; i < dgst_raw_len; i++) { + int input; + /* each byte conveys four 2-bit move commands */ + input = dgst_raw[i]; + for (b = 0; b < 4; b++) { + /* evaluate 2 bit, rest is shifted later */ + x += (input & 0x1) ? 1 : -1; + y += (input & 0x2) ? 1 : -1; + + /* assure we are still in bounds */ + x = MAX(x, 0); + y = MAX(y, 0); + x = MIN(x, FLDSIZE_X - 1); + y = MIN(y, FLDSIZE_Y - 1); + + /* augment the field */ + if (field[x][y] < len - 2) + field[x][y]++; + input = input >> 2; + } + } + + /* mark starting point and end point*/ + field[FLDSIZE_X / 2][FLDSIZE_Y / 2] = len - 1; + field[x][y] = len; + + /* assemble title */ + r = snprintf(title, sizeof(title), "[%s %u]", + sshkey_type(k), sshkey_size(k)); + /* If [type size] won't fit, then try [type]; fits "[ED25519-CERT]" */ + if (r < 0 || r > (int)sizeof(title)) + r = snprintf(title, sizeof(title), "[%s]", sshkey_type(k)); + tlen = (r <= 0) ? 0 : strlen(title); + + /* assemble hash ID. */ + r = snprintf(hash, sizeof(hash), "[%s]", alg); + hlen = (r <= 0) ? 0 : strlen(hash); + + /* output upper border */ + p = retval; + *p++ = '+'; + for (i = 0; i < (FLDSIZE_X - tlen) / 2; i++) + *p++ = '-'; + memcpy(p, title, tlen); + p += tlen; + for (i += tlen; i < FLDSIZE_X; i++) + *p++ = '-'; + *p++ = '+'; + *p++ = '\n'; + + /* output content */ + for (y = 0; y < FLDSIZE_Y; y++) { + *p++ = '|'; + for (x = 0; x < FLDSIZE_X; x++) + *p++ = augmentation_string[MIN(field[x][y], len)]; + *p++ = '|'; + *p++ = '\n'; + } + + /* output lower border */ + *p++ = '+'; + for (i = 0; i < (FLDSIZE_X - hlen) / 2; i++) + *p++ = '-'; + memcpy(p, hash, hlen); + p += hlen; + for (i += hlen; i < FLDSIZE_X; i++) + *p++ = '-'; + *p++ = '+'; + + return retval; +} + +char * +sshkey_fingerprint(const struct sshkey *k, int dgst_alg, + enum sshkey_fp_rep dgst_rep) +{ + char *retval = NULL; + u_char *dgst_raw; + size_t dgst_raw_len; + + if (sshkey_fingerprint_raw(k, dgst_alg, &dgst_raw, &dgst_raw_len) != 0) + return NULL; + switch (dgst_rep) { + case SSH_FP_DEFAULT: + if (dgst_alg == SSH_DIGEST_MD5) { + retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg), + dgst_raw, dgst_raw_len); + } else { + retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg), + dgst_raw, dgst_raw_len); + } + break; + case SSH_FP_HEX: + retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg), + dgst_raw, dgst_raw_len); + break; + case SSH_FP_BASE64: + retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg), + dgst_raw, dgst_raw_len); + break; + case SSH_FP_BUBBLEBABBLE: + retval = fingerprint_bubblebabble(dgst_raw, dgst_raw_len); + break; + case SSH_FP_RANDOMART: + retval = fingerprint_randomart(ssh_digest_alg_name(dgst_alg), + dgst_raw, dgst_raw_len, k); + break; + default: + explicit_bzero(dgst_raw, dgst_raw_len); + free(dgst_raw); + return NULL; + } + explicit_bzero(dgst_raw, dgst_raw_len); + free(dgst_raw); + return retval; +} + +#ifdef WITH_SSH1 +/* + * Reads a multiple-precision integer in decimal from the buffer, and advances + * the pointer. The integer must already be initialized. This function is + * permitted to modify the buffer. This leaves *cpp to point just beyond the + * last processed character. + */ +static int +read_decimal_bignum(char **cpp, BIGNUM *v) +{ + char *cp; + size_t e; + int skip = 1; /* skip white space */ + + cp = *cpp; + while (*cp == ' ' || *cp == '\t') + cp++; + e = strspn(cp, "0123456789"); + if (e == 0) + return SSH_ERR_INVALID_FORMAT; + if (e > SSHBUF_MAX_BIGNUM * 3) + return SSH_ERR_BIGNUM_TOO_LARGE; + if (cp[e] == '\0') + skip = 0; + else if (index(" \t\r\n", cp[e]) == NULL) + return SSH_ERR_INVALID_FORMAT; + cp[e] = '\0'; + if (BN_dec2bn(&v, cp) <= 0) + return SSH_ERR_INVALID_FORMAT; + *cpp = cp + e + skip; + return 0; +} +#endif /* WITH_SSH1 */ + +/* returns 0 ok, and < 0 error */ +int +sshkey_read(struct sshkey *ret, char **cpp) +{ + struct sshkey *k; + int retval = SSH_ERR_INVALID_FORMAT; + char *cp, *space; + int r, type, curve_nid = -1; + struct sshbuf *blob; +#ifdef WITH_SSH1 + char *ep; + u_long bits; +#endif /* WITH_SSH1 */ + + cp = *cpp; + + switch (ret->type) { + case KEY_RSA1: +#ifdef WITH_SSH1 + /* Get number of bits. */ + bits = strtoul(cp, &ep, 10); + if (*cp == '\0' || index(" \t\r\n", *ep) == NULL || + bits == 0 || bits > SSHBUF_MAX_BIGNUM * 8) + return SSH_ERR_INVALID_FORMAT; /* Bad bit count... */ + /* Get public exponent, public modulus. */ + if ((r = read_decimal_bignum(&ep, ret->rsa->e)) < 0) + return r; + if ((r = read_decimal_bignum(&ep, ret->rsa->n)) < 0) + return r; + *cpp = ep; + /* validate the claimed number of bits */ + if (BN_num_bits(ret->rsa->n) != (int)bits) + return SSH_ERR_KEY_BITS_MISMATCH; + retval = 0; +#endif /* WITH_SSH1 */ + break; + case KEY_UNSPEC: + case KEY_RSA: + case KEY_DSA: + case KEY_ECDSA: + case KEY_ED25519: + case KEY_DSA_CERT: + case KEY_ECDSA_CERT: + case KEY_RSA_CERT: + case KEY_ED25519_CERT: + space = strchr(cp, ' '); + if (space == NULL) + return SSH_ERR_INVALID_FORMAT; + *space = '\0'; + type = sshkey_type_from_name(cp); + if (sshkey_type_plain(type) == KEY_ECDSA && + (curve_nid = sshkey_ecdsa_nid_from_name(cp)) == -1) + return SSH_ERR_EC_CURVE_INVALID; + *space = ' '; + if (type == KEY_UNSPEC) + return SSH_ERR_INVALID_FORMAT; + cp = space+1; + if (*cp == '\0') + return SSH_ERR_INVALID_FORMAT; + if (ret->type != KEY_UNSPEC && ret->type != type) + return SSH_ERR_KEY_TYPE_MISMATCH; + if ((blob = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + /* trim comment */ + space = strchr(cp, ' '); + if (space) { + /* advance 'space': skip whitespace */ + *space++ = '\0'; + while (*space == ' ' || *space == '\t') + space++; + *cpp = space; + } else + *cpp = cp + strlen(cp); + if ((r = sshbuf_b64tod(blob, cp)) != 0) { + sshbuf_free(blob); + return r; + } + if ((r = sshkey_from_blob(sshbuf_ptr(blob), + sshbuf_len(blob), &k)) != 0) { + sshbuf_free(blob); + return r; + } + sshbuf_free(blob); + if (k->type != type) { + sshkey_free(k); + return SSH_ERR_KEY_TYPE_MISMATCH; + } + if (sshkey_type_plain(type) == KEY_ECDSA && + curve_nid != k->ecdsa_nid) { + sshkey_free(k); + return SSH_ERR_EC_CURVE_MISMATCH; + } + ret->type = type; + if (sshkey_is_cert(ret)) { + if (!sshkey_is_cert(k)) { + sshkey_free(k); + return SSH_ERR_EXPECTED_CERT; + } + if (ret->cert != NULL) + cert_free(ret->cert); + ret->cert = k->cert; + k->cert = NULL; + } +#ifdef WITH_OPENSSL + if (sshkey_type_plain(ret->type) == KEY_RSA) { + if (ret->rsa != NULL) + RSA_free(ret->rsa); + ret->rsa = k->rsa; + k->rsa = NULL; +#ifdef DEBUG_PK + RSA_print_fp(stderr, ret->rsa, 8); +#endif + } + if (sshkey_type_plain(ret->type) == KEY_DSA) { + if (ret->dsa != NULL) + DSA_free(ret->dsa); + ret->dsa = k->dsa; + k->dsa = NULL; +#ifdef DEBUG_PK + DSA_print_fp(stderr, ret->dsa, 8); +#endif + } +# ifdef OPENSSL_HAS_ECC + if (sshkey_type_plain(ret->type) == KEY_ECDSA) { + if (ret->ecdsa != NULL) + EC_KEY_free(ret->ecdsa); + ret->ecdsa = k->ecdsa; + ret->ecdsa_nid = k->ecdsa_nid; + k->ecdsa = NULL; + k->ecdsa_nid = -1; +#ifdef DEBUG_PK + sshkey_dump_ec_key(ret->ecdsa); +#endif + } +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + if (sshkey_type_plain(ret->type) == KEY_ED25519) { + free(ret->ed25519_pk); + ret->ed25519_pk = k->ed25519_pk; + k->ed25519_pk = NULL; +#ifdef DEBUG_PK + /* XXX */ +#endif + } + retval = 0; +/*XXXX*/ + sshkey_free(k); + if (retval != 0) + break; + break; + default: + return SSH_ERR_INVALID_ARGUMENT; + } + return retval; +} + +int +sshkey_to_base64(const struct sshkey *key, char **b64p) +{ + int r = SSH_ERR_INTERNAL_ERROR; + struct sshbuf *b = NULL; + char *uu = NULL; + + if (b64p != NULL) + *b64p = NULL; + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_putb(key, b)) != 0) + goto out; + if ((uu = sshbuf_dtob64(b)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + /* Success */ + if (b64p != NULL) { + *b64p = uu; + uu = NULL; + } + r = 0; + out: + sshbuf_free(b); + free(uu); + return r; +} + +static int +sshkey_format_rsa1(const struct sshkey *key, struct sshbuf *b) +{ + int r = SSH_ERR_INTERNAL_ERROR; +#ifdef WITH_SSH1 + u_int bits = 0; + char *dec_e = NULL, *dec_n = NULL; + + if (key->rsa == NULL || key->rsa->e == NULL || + key->rsa->n == NULL) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((dec_e = BN_bn2dec(key->rsa->e)) == NULL || + (dec_n = BN_bn2dec(key->rsa->n)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + /* size of modulus 'n' */ + if ((bits = BN_num_bits(key->rsa->n)) <= 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_putf(b, "%u %s %s", bits, dec_e, dec_n)) != 0) + goto out; + + /* Success */ + r = 0; + out: + if (dec_e != NULL) + OPENSSL_free(dec_e); + if (dec_n != NULL) + OPENSSL_free(dec_n); +#endif /* WITH_SSH1 */ + + return r; +} + +static int +sshkey_format_text(const struct sshkey *key, struct sshbuf *b) +{ + int r = SSH_ERR_INTERNAL_ERROR; + char *uu = NULL; + + if (key->type == KEY_RSA1) { + if ((r = sshkey_format_rsa1(key, b)) != 0) + goto out; + } else { + /* Unsupported key types handled in sshkey_to_base64() */ + if ((r = sshkey_to_base64(key, &uu)) != 0) + goto out; + if ((r = sshbuf_putf(b, "%s %s", + sshkey_ssh_name(key), uu)) != 0) + goto out; + } + r = 0; + out: + free(uu); + return r; +} + +int +sshkey_write(const struct sshkey *key, FILE *f) +{ + struct sshbuf *b = NULL; + int r = SSH_ERR_INTERNAL_ERROR; + + if ((b = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshkey_format_text(key, b)) != 0) + goto out; + if (fwrite(sshbuf_ptr(b), sshbuf_len(b), 1, f) != 1) { + if (feof(f)) + errno = EPIPE; + r = SSH_ERR_SYSTEM_ERROR; + goto out; + } + /* Success */ + r = 0; + out: + sshbuf_free(b); + return r; +} + +const char * +sshkey_cert_type(const struct sshkey *k) +{ + switch (k->cert->type) { + case SSH2_CERT_TYPE_USER: + return "user"; + case SSH2_CERT_TYPE_HOST: + return "host"; + default: + return "unknown"; + } +} + +#ifdef WITH_OPENSSL +static int +rsa_generate_private_key(u_int bits, RSA **rsap) +{ + RSA *private = NULL; + BIGNUM *f4 = NULL; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (rsap == NULL || + bits < SSH_RSA_MINIMUM_MODULUS_SIZE || + bits > SSHBUF_MAX_BIGNUM * 8) + return SSH_ERR_INVALID_ARGUMENT; + *rsap = NULL; + if ((private = RSA_new()) == NULL || (f4 = BN_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (!BN_set_word(f4, RSA_F4) || + !RSA_generate_key_ex(private, bits, f4, NULL)) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + *rsap = private; + private = NULL; + ret = 0; + out: + if (private != NULL) + RSA_free(private); + if (f4 != NULL) + BN_free(f4); + return ret; +} + +static int +dsa_generate_private_key(u_int bits, DSA **dsap) +{ + DSA *private; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (dsap == NULL || bits != 1024) + return SSH_ERR_INVALID_ARGUMENT; + if ((private = DSA_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + *dsap = NULL; + if (!DSA_generate_parameters_ex(private, bits, NULL, 0, NULL, + NULL, NULL) || !DSA_generate_key(private)) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + *dsap = private; + private = NULL; + ret = 0; + out: + if (private != NULL) + DSA_free(private); + return ret; +} + +# ifdef OPENSSL_HAS_ECC +int +sshkey_ecdsa_key_to_nid(EC_KEY *k) +{ + EC_GROUP *eg; + int nids[] = { + NID_X9_62_prime256v1, + NID_secp384r1, +# ifdef OPENSSL_HAS_NISTP521 + NID_secp521r1, +# endif /* OPENSSL_HAS_NISTP521 */ + -1 + }; + int nid; + u_int i; + BN_CTX *bnctx; + const EC_GROUP *g = EC_KEY_get0_group(k); + + /* + * The group may be stored in a ASN.1 encoded private key in one of two + * ways: as a "named group", which is reconstituted by ASN.1 object ID + * or explicit group parameters encoded into the key blob. Only the + * "named group" case sets the group NID for us, but we can figure + * it out for the other case by comparing against all the groups that + * are supported. + */ + if ((nid = EC_GROUP_get_curve_name(g)) > 0) + return nid; + if ((bnctx = BN_CTX_new()) == NULL) + return -1; + for (i = 0; nids[i] != -1; i++) { + if ((eg = EC_GROUP_new_by_curve_name(nids[i])) == NULL) { + BN_CTX_free(bnctx); + return -1; + } + if (EC_GROUP_cmp(g, eg, bnctx) == 0) + break; + EC_GROUP_free(eg); + } + BN_CTX_free(bnctx); + if (nids[i] != -1) { + /* Use the group with the NID attached */ + EC_GROUP_set_asn1_flag(eg, OPENSSL_EC_NAMED_CURVE); + if (EC_KEY_set_group(k, eg) != 1) { + EC_GROUP_free(eg); + return -1; + } + } + return nids[i]; +} + +static int +ecdsa_generate_private_key(u_int bits, int *nid, EC_KEY **ecdsap) +{ + EC_KEY *private; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (nid == NULL || ecdsap == NULL || + (*nid = sshkey_ecdsa_bits_to_nid(bits)) == -1) + return SSH_ERR_INVALID_ARGUMENT; + *ecdsap = NULL; + if ((private = EC_KEY_new_by_curve_name(*nid)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (EC_KEY_generate_key(private) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + EC_KEY_set_asn1_flag(private, OPENSSL_EC_NAMED_CURVE); + *ecdsap = private; + private = NULL; + ret = 0; + out: + if (private != NULL) + EC_KEY_free(private); + return ret; +} +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + +int +sshkey_generate(int type, u_int bits, struct sshkey **keyp) +{ + struct sshkey *k; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (keyp == NULL) + return SSH_ERR_INVALID_ARGUMENT; + *keyp = NULL; + if ((k = sshkey_new(KEY_UNSPEC)) == NULL) + return SSH_ERR_ALLOC_FAIL; + switch (type) { + case KEY_ED25519: + if ((k->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL || + (k->ed25519_sk = malloc(ED25519_SK_SZ)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + break; + } + crypto_sign_ed25519_keypair(k->ed25519_pk, k->ed25519_sk); + ret = 0; + break; +#ifdef WITH_OPENSSL + case KEY_DSA: + ret = dsa_generate_private_key(bits, &k->dsa); + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + ret = ecdsa_generate_private_key(bits, &k->ecdsa_nid, + &k->ecdsa); + break; +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA: + case KEY_RSA1: + ret = rsa_generate_private_key(bits, &k->rsa); + break; +#endif /* WITH_OPENSSL */ + default: + ret = SSH_ERR_INVALID_ARGUMENT; + } + if (ret == 0) { + k->type = type; + *keyp = k; + } else + sshkey_free(k); + return ret; +} + +int +sshkey_cert_copy(const struct sshkey *from_key, struct sshkey *to_key) +{ + u_int i; + const struct sshkey_cert *from; + struct sshkey_cert *to; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (to_key->cert != NULL) { + cert_free(to_key->cert); + to_key->cert = NULL; + } + + if ((from = from_key->cert) == NULL) + return SSH_ERR_INVALID_ARGUMENT; + + if ((to = to_key->cert = cert_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + + if ((ret = sshbuf_putb(to->certblob, from->certblob)) != 0 || + (ret = sshbuf_putb(to->critical, from->critical)) != 0 || + (ret = sshbuf_putb(to->extensions, from->extensions) != 0)) + return ret; + + to->serial = from->serial; + to->type = from->type; + if (from->key_id == NULL) + to->key_id = NULL; + else if ((to->key_id = strdup(from->key_id)) == NULL) + return SSH_ERR_ALLOC_FAIL; + to->valid_after = from->valid_after; + to->valid_before = from->valid_before; + if (from->signature_key == NULL) + to->signature_key = NULL; + else if ((ret = sshkey_from_private(from->signature_key, + &to->signature_key)) != 0) + return ret; + + if (from->nprincipals > SSHKEY_CERT_MAX_PRINCIPALS) + return SSH_ERR_INVALID_ARGUMENT; + if (from->nprincipals > 0) { + if ((to->principals = calloc(from->nprincipals, + sizeof(*to->principals))) == NULL) + return SSH_ERR_ALLOC_FAIL; + for (i = 0; i < from->nprincipals; i++) { + to->principals[i] = strdup(from->principals[i]); + if (to->principals[i] == NULL) { + to->nprincipals = i; + return SSH_ERR_ALLOC_FAIL; + } + } + } + to->nprincipals = from->nprincipals; + return 0; +} + +int +sshkey_from_private(const struct sshkey *k, struct sshkey **pkp) +{ + struct sshkey *n = NULL; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (pkp != NULL) + *pkp = NULL; + + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_DSA: + case KEY_DSA_CERT: + if ((n = sshkey_new(k->type)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((BN_copy(n->dsa->p, k->dsa->p) == NULL) || + (BN_copy(n->dsa->q, k->dsa->q) == NULL) || + (BN_copy(n->dsa->g, k->dsa->g) == NULL) || + (BN_copy(n->dsa->pub_key, k->dsa->pub_key) == NULL)) { + sshkey_free(n); + return SSH_ERR_ALLOC_FAIL; + } + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + case KEY_ECDSA_CERT: + if ((n = sshkey_new(k->type)) == NULL) + return SSH_ERR_ALLOC_FAIL; + n->ecdsa_nid = k->ecdsa_nid; + n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid); + if (n->ecdsa == NULL) { + sshkey_free(n); + return SSH_ERR_ALLOC_FAIL; + } + if (EC_KEY_set_public_key(n->ecdsa, + EC_KEY_get0_public_key(k->ecdsa)) != 1) { + sshkey_free(n); + return SSH_ERR_LIBCRYPTO_ERROR; + } + break; +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA: + case KEY_RSA1: + case KEY_RSA_CERT: + if ((n = sshkey_new(k->type)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((BN_copy(n->rsa->n, k->rsa->n) == NULL) || + (BN_copy(n->rsa->e, k->rsa->e) == NULL)) { + sshkey_free(n); + return SSH_ERR_ALLOC_FAIL; + } + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + if ((n = sshkey_new(k->type)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if (k->ed25519_pk != NULL) { + if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) { + sshkey_free(n); + return SSH_ERR_ALLOC_FAIL; + } + memcpy(n->ed25519_pk, k->ed25519_pk, ED25519_PK_SZ); + } + break; + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } + if (sshkey_is_cert(k)) { + if ((ret = sshkey_cert_copy(k, n)) != 0) { + sshkey_free(n); + return ret; + } + } + *pkp = n; + return 0; +} + +static int +cert_parse(struct sshbuf *b, struct sshkey *key, struct sshbuf *certbuf) +{ + struct sshbuf *principals = NULL, *crit = NULL; + struct sshbuf *exts = NULL, *ca = NULL; + u_char *sig = NULL; + size_t signed_len = 0, slen = 0, kidlen = 0; + int ret = SSH_ERR_INTERNAL_ERROR; + + /* Copy the entire key blob for verification and later serialisation */ + if ((ret = sshbuf_putb(key->cert->certblob, certbuf)) != 0) + return ret; + + /* Parse body of certificate up to signature */ + if ((ret = sshbuf_get_u64(b, &key->cert->serial)) != 0 || + (ret = sshbuf_get_u32(b, &key->cert->type)) != 0 || + (ret = sshbuf_get_cstring(b, &key->cert->key_id, &kidlen)) != 0 || + (ret = sshbuf_froms(b, &principals)) != 0 || + (ret = sshbuf_get_u64(b, &key->cert->valid_after)) != 0 || + (ret = sshbuf_get_u64(b, &key->cert->valid_before)) != 0 || + (ret = sshbuf_froms(b, &crit)) != 0 || + (ret = sshbuf_froms(b, &exts)) != 0 || + (ret = sshbuf_get_string_direct(b, NULL, NULL)) != 0 || + (ret = sshbuf_froms(b, &ca)) != 0) { + /* XXX debug print error for ret */ + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* Signature is left in the buffer so we can calculate this length */ + signed_len = sshbuf_len(key->cert->certblob) - sshbuf_len(b); + + if ((ret = sshbuf_get_string(b, &sig, &slen)) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + + if (key->cert->type != SSH2_CERT_TYPE_USER && + key->cert->type != SSH2_CERT_TYPE_HOST) { + ret = SSH_ERR_KEY_CERT_UNKNOWN_TYPE; + goto out; + } + + /* Parse principals section */ + while (sshbuf_len(principals) > 0) { + char *principal = NULL; + char **oprincipals = NULL; + + if (key->cert->nprincipals >= SSHKEY_CERT_MAX_PRINCIPALS) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if ((ret = sshbuf_get_cstring(principals, &principal, + NULL)) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + oprincipals = key->cert->principals; + key->cert->principals = reallocarray(key->cert->principals, + key->cert->nprincipals + 1, sizeof(*key->cert->principals)); + if (key->cert->principals == NULL) { + free(principal); + key->cert->principals = oprincipals; + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + key->cert->principals[key->cert->nprincipals++] = principal; + } + + /* + * Stash a copies of the critical options and extensions sections + * for later use. + */ + if ((ret = sshbuf_putb(key->cert->critical, crit)) != 0 || + (exts != NULL && + (ret = sshbuf_putb(key->cert->extensions, exts)) != 0)) + goto out; + + /* + * Validate critical options and extensions sections format. + */ + while (sshbuf_len(crit) != 0) { + if ((ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0 || + (ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0) { + sshbuf_reset(key->cert->critical); + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + while (exts != NULL && sshbuf_len(exts) != 0) { + if ((ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0 || + (ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0) { + sshbuf_reset(key->cert->extensions); + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + + /* Parse CA key and check signature */ + if (sshkey_from_blob_internal(ca, &key->cert->signature_key, 0) != 0) { + ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY; + goto out; + } + if (!sshkey_type_is_valid_ca(key->cert->signature_key->type)) { + ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY; + goto out; + } + if ((ret = sshkey_verify(key->cert->signature_key, sig, slen, + sshbuf_ptr(key->cert->certblob), signed_len, 0)) != 0) + goto out; + + /* Success */ + ret = 0; + out: + sshbuf_free(ca); + sshbuf_free(crit); + sshbuf_free(exts); + sshbuf_free(principals); + free(sig); + return ret; +} + +static int +sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp, + int allow_cert) +{ + int type, ret = SSH_ERR_INTERNAL_ERROR; + char *ktype = NULL, *curve = NULL; + struct sshkey *key = NULL; + size_t len; + u_char *pk = NULL; + struct sshbuf *copy; +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) + EC_POINT *q = NULL; +#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */ + +#ifdef DEBUG_PK /* XXX */ + sshbuf_dump(b, stderr); +#endif + *keyp = NULL; + if ((copy = sshbuf_fromb(b)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (sshbuf_get_cstring(b, &ktype, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + + type = sshkey_type_from_name(ktype); + if (!allow_cert && sshkey_type_is_cert(type)) { + ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY; + goto out; + } + switch (type) { +#ifdef WITH_OPENSSL + case KEY_RSA_CERT: + /* Skip nonce */ + if (sshbuf_get_string_direct(b, NULL, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* FALLTHROUGH */ + case KEY_RSA: + if ((key = sshkey_new(type)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (sshbuf_get_bignum2(b, key->rsa->e) != 0 || + sshbuf_get_bignum2(b, key->rsa->n) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } +#ifdef DEBUG_PK + RSA_print_fp(stderr, key->rsa, 8); +#endif + break; + case KEY_DSA_CERT: + /* Skip nonce */ + if (sshbuf_get_string_direct(b, NULL, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* FALLTHROUGH */ + case KEY_DSA: + if ((key = sshkey_new(type)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (sshbuf_get_bignum2(b, key->dsa->p) != 0 || + sshbuf_get_bignum2(b, key->dsa->q) != 0 || + sshbuf_get_bignum2(b, key->dsa->g) != 0 || + sshbuf_get_bignum2(b, key->dsa->pub_key) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } +#ifdef DEBUG_PK + DSA_print_fp(stderr, key->dsa, 8); +#endif + break; + case KEY_ECDSA_CERT: + /* Skip nonce */ + if (sshbuf_get_string_direct(b, NULL, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* FALLTHROUGH */ +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + if ((key = sshkey_new(type)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + key->ecdsa_nid = sshkey_ecdsa_nid_from_name(ktype); + if (sshbuf_get_cstring(b, &curve, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (key->ecdsa_nid != sshkey_curve_name_to_nid(curve)) { + ret = SSH_ERR_EC_CURVE_MISMATCH; + goto out; + } + if (key->ecdsa != NULL) + EC_KEY_free(key->ecdsa); + if ((key->ecdsa = EC_KEY_new_by_curve_name(key->ecdsa_nid)) + == NULL) { + ret = SSH_ERR_EC_CURVE_INVALID; + goto out; + } + if ((q = EC_POINT_new(EC_KEY_get0_group(key->ecdsa))) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (sshbuf_get_ec(b, q, EC_KEY_get0_group(key->ecdsa)) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (sshkey_ec_validate_public(EC_KEY_get0_group(key->ecdsa), + q) != 0) { + ret = SSH_ERR_KEY_INVALID_EC_VALUE; + goto out; + } + if (EC_KEY_set_public_key(key->ecdsa, q) != 1) { + /* XXX assume it is a allocation error */ + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } +#ifdef DEBUG_PK + sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q); +#endif + break; +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + case KEY_ED25519_CERT: + /* Skip nonce */ + if (sshbuf_get_string_direct(b, NULL, NULL) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* FALLTHROUGH */ + case KEY_ED25519: + if ((ret = sshbuf_get_string(b, &pk, &len)) != 0) + goto out; + if (len != ED25519_PK_SZ) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + if ((key = sshkey_new(type)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + key->ed25519_pk = pk; + pk = NULL; + break; + case KEY_UNSPEC: + if ((key = sshkey_new(type)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + break; + default: + ret = SSH_ERR_KEY_TYPE_UNKNOWN; + goto out; + } + + /* Parse certificate potion */ + if (sshkey_is_cert(key) && (ret = cert_parse(b, key, copy)) != 0) + goto out; + + if (key != NULL && sshbuf_len(b) != 0) { + ret = SSH_ERR_INVALID_FORMAT; + goto out; + } + ret = 0; + *keyp = key; + key = NULL; + out: + sshbuf_free(copy); + sshkey_free(key); + free(ktype); + free(curve); + free(pk); +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) + if (q != NULL) + EC_POINT_free(q); +#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */ + return ret; +} + +int +sshkey_from_blob(const u_char *blob, size_t blen, struct sshkey **keyp) +{ + struct sshbuf *b; + int r; + + if ((b = sshbuf_from(blob, blen)) == NULL) + return SSH_ERR_ALLOC_FAIL; + r = sshkey_from_blob_internal(b, keyp, 1); + sshbuf_free(b); + return r; +} + +int +sshkey_fromb(struct sshbuf *b, struct sshkey **keyp) +{ + return sshkey_from_blob_internal(b, keyp, 1); +} + +int +sshkey_froms(struct sshbuf *buf, struct sshkey **keyp) +{ + struct sshbuf *b; + int r; + + if ((r = sshbuf_froms(buf, &b)) != 0) + return r; + r = sshkey_from_blob_internal(b, keyp, 1); + sshbuf_free(b); + return r; +} + +int +sshkey_sign(const struct sshkey *key, + u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat) +{ + if (sigp != NULL) + *sigp = NULL; + if (lenp != NULL) + *lenp = 0; + if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE) + return SSH_ERR_INVALID_ARGUMENT; + switch (key->type) { +#ifdef WITH_OPENSSL + case KEY_DSA_CERT: + case KEY_DSA: + return ssh_dss_sign(key, sigp, lenp, data, datalen, compat); +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA_CERT: + case KEY_ECDSA: + return ssh_ecdsa_sign(key, sigp, lenp, data, datalen, compat); +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA_CERT: + case KEY_RSA: + return ssh_rsa_sign(key, sigp, lenp, data, datalen, compat); +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + return ssh_ed25519_sign(key, sigp, lenp, data, datalen, compat); + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } +} + +/* + * ssh_key_verify returns 0 for a correct signature and < 0 on error. + */ +int +sshkey_verify(const struct sshkey *key, + const u_char *sig, size_t siglen, + const u_char *data, size_t dlen, u_int compat) +{ + if (siglen == 0 || dlen > SSH_KEY_MAX_SIGN_DATA_SIZE) + return SSH_ERR_INVALID_ARGUMENT; + switch (key->type) { +#ifdef WITH_OPENSSL + case KEY_DSA_CERT: + case KEY_DSA: + return ssh_dss_verify(key, sig, siglen, data, dlen, compat); +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA_CERT: + case KEY_ECDSA: + return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat); +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA_CERT: + case KEY_RSA: + return ssh_rsa_verify(key, sig, siglen, data, dlen, compat); +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + case KEY_ED25519_CERT: + return ssh_ed25519_verify(key, sig, siglen, data, dlen, compat); + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } +} + +/* Converts a private to a public key */ +int +sshkey_demote(const struct sshkey *k, struct sshkey **dkp) +{ + struct sshkey *pk; + int ret = SSH_ERR_INTERNAL_ERROR; + + if (dkp != NULL) + *dkp = NULL; + + if ((pk = calloc(1, sizeof(*pk))) == NULL) + return SSH_ERR_ALLOC_FAIL; + pk->type = k->type; + pk->flags = k->flags; + pk->ecdsa_nid = k->ecdsa_nid; + pk->dsa = NULL; + pk->ecdsa = NULL; + pk->rsa = NULL; + pk->ed25519_pk = NULL; + pk->ed25519_sk = NULL; + + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA_CERT: + if ((ret = sshkey_cert_copy(k, pk)) != 0) + goto fail; + /* FALLTHROUGH */ + case KEY_RSA1: + case KEY_RSA: + if ((pk->rsa = RSA_new()) == NULL || + (pk->rsa->e = BN_dup(k->rsa->e)) == NULL || + (pk->rsa->n = BN_dup(k->rsa->n)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto fail; + } + break; + case KEY_DSA_CERT: + if ((ret = sshkey_cert_copy(k, pk)) != 0) + goto fail; + /* FALLTHROUGH */ + case KEY_DSA: + if ((pk->dsa = DSA_new()) == NULL || + (pk->dsa->p = BN_dup(k->dsa->p)) == NULL || + (pk->dsa->q = BN_dup(k->dsa->q)) == NULL || + (pk->dsa->g = BN_dup(k->dsa->g)) == NULL || + (pk->dsa->pub_key = BN_dup(k->dsa->pub_key)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto fail; + } + break; + case KEY_ECDSA_CERT: + if ((ret = sshkey_cert_copy(k, pk)) != 0) + goto fail; + /* FALLTHROUGH */ +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + pk->ecdsa = EC_KEY_new_by_curve_name(pk->ecdsa_nid); + if (pk->ecdsa == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto fail; + } + if (EC_KEY_set_public_key(pk->ecdsa, + EC_KEY_get0_public_key(k->ecdsa)) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto fail; + } + break; +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + case KEY_ED25519_CERT: + if ((ret = sshkey_cert_copy(k, pk)) != 0) + goto fail; + /* FALLTHROUGH */ + case KEY_ED25519: + if (k->ed25519_pk != NULL) { + if ((pk->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto fail; + } + memcpy(pk->ed25519_pk, k->ed25519_pk, ED25519_PK_SZ); + } + break; + default: + ret = SSH_ERR_KEY_TYPE_UNKNOWN; + fail: + sshkey_free(pk); + return ret; + } + *dkp = pk; + return 0; +} + +/* Convert a plain key to their _CERT equivalent */ +int +sshkey_to_certified(struct sshkey *k) +{ + int newtype; + + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_RSA: + newtype = KEY_RSA_CERT; + break; + case KEY_DSA: + newtype = KEY_DSA_CERT; + break; + case KEY_ECDSA: + newtype = KEY_ECDSA_CERT; + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + newtype = KEY_ED25519_CERT; + break; + default: + return SSH_ERR_INVALID_ARGUMENT; + } + if ((k->cert = cert_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + k->type = newtype; + return 0; +} + +/* Convert a certificate to its raw key equivalent */ +int +sshkey_drop_cert(struct sshkey *k) +{ + if (!sshkey_type_is_cert(k->type)) + return SSH_ERR_KEY_TYPE_UNKNOWN; + cert_free(k->cert); + k->cert = NULL; + k->type = sshkey_type_plain(k->type); + return 0; +} + +/* Sign a certified key, (re-)generating the signed certblob. */ +int +sshkey_certify(struct sshkey *k, struct sshkey *ca) +{ + struct sshbuf *principals = NULL; + u_char *ca_blob = NULL, *sig_blob = NULL, nonce[32]; + size_t i, ca_len, sig_len; + int ret = SSH_ERR_INTERNAL_ERROR; + struct sshbuf *cert; + + if (k == NULL || k->cert == NULL || + k->cert->certblob == NULL || ca == NULL) + return SSH_ERR_INVALID_ARGUMENT; + if (!sshkey_is_cert(k)) + return SSH_ERR_KEY_TYPE_UNKNOWN; + if (!sshkey_type_is_valid_ca(ca->type)) + return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY; + + if ((ret = sshkey_to_blob(ca, &ca_blob, &ca_len)) != 0) + return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY; + + cert = k->cert->certblob; /* for readability */ + sshbuf_reset(cert); + if ((ret = sshbuf_put_cstring(cert, sshkey_ssh_name(k))) != 0) + goto out; + + /* -v01 certs put nonce first */ + arc4random_buf(&nonce, sizeof(nonce)); + if ((ret = sshbuf_put_string(cert, nonce, sizeof(nonce))) != 0) + goto out; + + /* XXX this substantially duplicates to_blob(); refactor */ + switch (k->type) { +#ifdef WITH_OPENSSL + case KEY_DSA_CERT: + if ((ret = sshbuf_put_bignum2(cert, k->dsa->p)) != 0 || + (ret = sshbuf_put_bignum2(cert, k->dsa->q)) != 0 || + (ret = sshbuf_put_bignum2(cert, k->dsa->g)) != 0 || + (ret = sshbuf_put_bignum2(cert, k->dsa->pub_key)) != 0) + goto out; + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA_CERT: + if ((ret = sshbuf_put_cstring(cert, + sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 || + (ret = sshbuf_put_ec(cert, + EC_KEY_get0_public_key(k->ecdsa), + EC_KEY_get0_group(k->ecdsa))) != 0) + goto out; + break; +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA_CERT: + if ((ret = sshbuf_put_bignum2(cert, k->rsa->e)) != 0 || + (ret = sshbuf_put_bignum2(cert, k->rsa->n)) != 0) + goto out; + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519_CERT: + if ((ret = sshbuf_put_string(cert, + k->ed25519_pk, ED25519_PK_SZ)) != 0) + goto out; + break; + default: + ret = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + + if ((ret = sshbuf_put_u64(cert, k->cert->serial)) != 0 || + (ret = sshbuf_put_u32(cert, k->cert->type)) != 0 || + (ret = sshbuf_put_cstring(cert, k->cert->key_id)) != 0) + goto out; + + if ((principals = sshbuf_new()) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + for (i = 0; i < k->cert->nprincipals; i++) { + if ((ret = sshbuf_put_cstring(principals, + k->cert->principals[i])) != 0) + goto out; + } + if ((ret = sshbuf_put_stringb(cert, principals)) != 0 || + (ret = sshbuf_put_u64(cert, k->cert->valid_after)) != 0 || + (ret = sshbuf_put_u64(cert, k->cert->valid_before)) != 0 || + (ret = sshbuf_put_stringb(cert, k->cert->critical)) != 0 || + (ret = sshbuf_put_stringb(cert, k->cert->extensions)) != 0 || + (ret = sshbuf_put_string(cert, NULL, 0)) != 0 || /* Reserved */ + (ret = sshbuf_put_string(cert, ca_blob, ca_len)) != 0) + goto out; + + /* Sign the whole mess */ + if ((ret = sshkey_sign(ca, &sig_blob, &sig_len, sshbuf_ptr(cert), + sshbuf_len(cert), 0)) != 0) + goto out; + + /* Append signature and we are done */ + if ((ret = sshbuf_put_string(cert, sig_blob, sig_len)) != 0) + goto out; + ret = 0; + out: + if (ret != 0) + sshbuf_reset(cert); + if (sig_blob != NULL) + free(sig_blob); + if (ca_blob != NULL) + free(ca_blob); + if (principals != NULL) + sshbuf_free(principals); + return ret; +} + +int +sshkey_cert_check_authority(const struct sshkey *k, + int want_host, int require_principal, + const char *name, const char **reason) +{ + u_int i, principal_matches; + time_t now = time(NULL); + + if (reason != NULL) + *reason = NULL; + + if (want_host) { + if (k->cert->type != SSH2_CERT_TYPE_HOST) { + *reason = "Certificate invalid: not a host certificate"; + return SSH_ERR_KEY_CERT_INVALID; + } + } else { + if (k->cert->type != SSH2_CERT_TYPE_USER) { + *reason = "Certificate invalid: not a user certificate"; + return SSH_ERR_KEY_CERT_INVALID; + } + } + if (now < 0) { + /* yikes - system clock before epoch! */ + *reason = "Certificate invalid: not yet valid"; + return SSH_ERR_KEY_CERT_INVALID; + } + if ((u_int64_t)now < k->cert->valid_after) { + *reason = "Certificate invalid: not yet valid"; + return SSH_ERR_KEY_CERT_INVALID; + } + if ((u_int64_t)now >= k->cert->valid_before) { + *reason = "Certificate invalid: expired"; + return SSH_ERR_KEY_CERT_INVALID; + } + if (k->cert->nprincipals == 0) { + if (require_principal) { + *reason = "Certificate lacks principal list"; + return SSH_ERR_KEY_CERT_INVALID; + } + } else if (name != NULL) { + principal_matches = 0; + for (i = 0; i < k->cert->nprincipals; i++) { + if (strcmp(name, k->cert->principals[i]) == 0) { + principal_matches = 1; + break; + } + } + if (!principal_matches) { + *reason = "Certificate invalid: name is not a listed " + "principal"; + return SSH_ERR_KEY_CERT_INVALID; + } + } + return 0; +} + +int +sshkey_private_serialize(const struct sshkey *key, struct sshbuf *b) +{ + int r = SSH_ERR_INTERNAL_ERROR; + + if ((r = sshbuf_put_cstring(b, sshkey_ssh_name(key))) != 0) + goto out; + switch (key->type) { +#ifdef WITH_OPENSSL + case KEY_RSA: + if ((r = sshbuf_put_bignum2(b, key->rsa->n)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->e)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->d)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->iqmp)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->p)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->q)) != 0) + goto out; + break; + case KEY_RSA_CERT: + if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->d)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->iqmp)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->p)) != 0 || + (r = sshbuf_put_bignum2(b, key->rsa->q)) != 0) + goto out; + break; + case KEY_DSA: + if ((r = sshbuf_put_bignum2(b, key->dsa->p)) != 0 || + (r = sshbuf_put_bignum2(b, key->dsa->q)) != 0 || + (r = sshbuf_put_bignum2(b, key->dsa->g)) != 0 || + (r = sshbuf_put_bignum2(b, key->dsa->pub_key)) != 0 || + (r = sshbuf_put_bignum2(b, key->dsa->priv_key)) != 0) + goto out; + break; + case KEY_DSA_CERT: + if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 || + (r = sshbuf_put_bignum2(b, key->dsa->priv_key)) != 0) + goto out; + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + if ((r = sshbuf_put_cstring(b, + sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 || + (r = sshbuf_put_eckey(b, key->ecdsa)) != 0 || + (r = sshbuf_put_bignum2(b, + EC_KEY_get0_private_key(key->ecdsa))) != 0) + goto out; + break; + case KEY_ECDSA_CERT: + if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 || + (r = sshbuf_put_bignum2(b, + EC_KEY_get0_private_key(key->ecdsa))) != 0) + goto out; + break; +# endif /* OPENSSL_HAS_ECC */ +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + if ((r = sshbuf_put_string(b, key->ed25519_pk, + ED25519_PK_SZ)) != 0 || + (r = sshbuf_put_string(b, key->ed25519_sk, + ED25519_SK_SZ)) != 0) + goto out; + break; + case KEY_ED25519_CERT: + if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 || + (r = sshbuf_put_string(b, key->ed25519_pk, + ED25519_PK_SZ)) != 0 || + (r = sshbuf_put_string(b, key->ed25519_sk, + ED25519_SK_SZ)) != 0) + goto out; + break; + default: + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + /* success */ + r = 0; + out: + return r; +} + +int +sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp) +{ + char *tname = NULL, *curve = NULL; + struct sshkey *k = NULL; + size_t pklen = 0, sklen = 0; + int type, r = SSH_ERR_INTERNAL_ERROR; + u_char *ed25519_pk = NULL, *ed25519_sk = NULL; +#ifdef WITH_OPENSSL + BIGNUM *exponent = NULL; +#endif /* WITH_OPENSSL */ + + if (kp != NULL) + *kp = NULL; + if ((r = sshbuf_get_cstring(buf, &tname, NULL)) != 0) + goto out; + type = sshkey_type_from_name(tname); + switch (type) { +#ifdef WITH_OPENSSL + case KEY_DSA: + if ((k = sshkey_new_private(type)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_get_bignum2(buf, k->dsa->p)) != 0 || + (r = sshbuf_get_bignum2(buf, k->dsa->q)) != 0 || + (r = sshbuf_get_bignum2(buf, k->dsa->g)) != 0 || + (r = sshbuf_get_bignum2(buf, k->dsa->pub_key)) != 0 || + (r = sshbuf_get_bignum2(buf, k->dsa->priv_key)) != 0) + goto out; + break; + case KEY_DSA_CERT: + if ((r = sshkey_froms(buf, &k)) != 0 || + (r = sshkey_add_private(k)) != 0 || + (r = sshbuf_get_bignum2(buf, k->dsa->priv_key)) != 0) + goto out; + break; +# ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + if ((k = sshkey_new_private(type)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0) + goto out; + if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) { + r = SSH_ERR_EC_CURVE_MISMATCH; + goto out; + } + k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid); + if (k->ecdsa == NULL || (exponent = BN_new()) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 || + (r = sshbuf_get_bignum2(buf, exponent))) + goto out; + if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa), + EC_KEY_get0_public_key(k->ecdsa)) != 0) || + (r = sshkey_ec_validate_private(k->ecdsa)) != 0) + goto out; + break; + case KEY_ECDSA_CERT: + if ((exponent = BN_new()) == NULL) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((r = sshkey_froms(buf, &k)) != 0 || + (r = sshkey_add_private(k)) != 0 || + (r = sshbuf_get_bignum2(buf, exponent)) != 0) + goto out; + if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa), + EC_KEY_get0_public_key(k->ecdsa)) != 0) || + (r = sshkey_ec_validate_private(k->ecdsa)) != 0) + goto out; + break; +# endif /* OPENSSL_HAS_ECC */ + case KEY_RSA: + if ((k = sshkey_new_private(type)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_get_bignum2(buf, k->rsa->n)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->e)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->d)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->iqmp)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->p)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->q)) != 0 || + (r = rsa_generate_additional_parameters(k->rsa)) != 0) + goto out; + break; + case KEY_RSA_CERT: + if ((r = sshkey_froms(buf, &k)) != 0 || + (r = sshkey_add_private(k)) != 0 || + (r = sshbuf_get_bignum2(buf, k->rsa->d) != 0) || + (r = sshbuf_get_bignum2(buf, k->rsa->iqmp) != 0) || + (r = sshbuf_get_bignum2(buf, k->rsa->p) != 0) || + (r = sshbuf_get_bignum2(buf, k->rsa->q) != 0) || + (r = rsa_generate_additional_parameters(k->rsa)) != 0) + goto out; + break; +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + if ((k = sshkey_new_private(type)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 || + (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0) + goto out; + if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + k->ed25519_pk = ed25519_pk; + k->ed25519_sk = ed25519_sk; + ed25519_pk = ed25519_sk = NULL; + break; + case KEY_ED25519_CERT: + if ((r = sshkey_froms(buf, &k)) != 0 || + (r = sshkey_add_private(k)) != 0 || + (r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 || + (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0) + goto out; + if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + k->ed25519_pk = ed25519_pk; + k->ed25519_sk = ed25519_sk; + ed25519_pk = ed25519_sk = NULL; + break; + default: + r = SSH_ERR_KEY_TYPE_UNKNOWN; + goto out; + } +#ifdef WITH_OPENSSL + /* enable blinding */ + switch (k->type) { + case KEY_RSA: + case KEY_RSA_CERT: + case KEY_RSA1: + if (RSA_blinding_on(k->rsa, NULL) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + break; + } +#endif /* WITH_OPENSSL */ + /* success */ + r = 0; + if (kp != NULL) { + *kp = k; + k = NULL; + } + out: + free(tname); + free(curve); +#ifdef WITH_OPENSSL + if (exponent != NULL) + BN_clear_free(exponent); +#endif /* WITH_OPENSSL */ + sshkey_free(k); + if (ed25519_pk != NULL) { + explicit_bzero(ed25519_pk, pklen); + free(ed25519_pk); + } + if (ed25519_sk != NULL) { + explicit_bzero(ed25519_sk, sklen); + free(ed25519_sk); + } + return r; +} + +#if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC) +int +sshkey_ec_validate_public(const EC_GROUP *group, const EC_POINT *public) +{ + BN_CTX *bnctx; + EC_POINT *nq = NULL; + BIGNUM *order, *x, *y, *tmp; + int ret = SSH_ERR_KEY_INVALID_EC_VALUE; + + if ((bnctx = BN_CTX_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + BN_CTX_start(bnctx); + + /* + * We shouldn't ever hit this case because bignum_get_ecpoint() + * refuses to load GF2m points. + */ + if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != + NID_X9_62_prime_field) + goto out; + + /* Q != infinity */ + if (EC_POINT_is_at_infinity(group, public)) + goto out; + + if ((x = BN_CTX_get(bnctx)) == NULL || + (y = BN_CTX_get(bnctx)) == NULL || + (order = BN_CTX_get(bnctx)) == NULL || + (tmp = BN_CTX_get(bnctx)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + + /* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */ + if (EC_GROUP_get_order(group, order, bnctx) != 1 || + EC_POINT_get_affine_coordinates_GFp(group, public, + x, y, bnctx) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if (BN_num_bits(x) <= BN_num_bits(order) / 2 || + BN_num_bits(y) <= BN_num_bits(order) / 2) + goto out; + + /* nQ == infinity (n == order of subgroup) */ + if ((nq = EC_POINT_new(group)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (EC_POINT_mul(group, nq, NULL, public, order, bnctx) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if (EC_POINT_is_at_infinity(group, nq) != 1) + goto out; + + /* x < order - 1, y < order - 1 */ + if (!BN_sub(tmp, order, BN_value_one())) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if (BN_cmp(x, tmp) >= 0 || BN_cmp(y, tmp) >= 0) + goto out; + ret = 0; + out: + BN_CTX_free(bnctx); + if (nq != NULL) + EC_POINT_free(nq); + return ret; +} + +int +sshkey_ec_validate_private(const EC_KEY *key) +{ + BN_CTX *bnctx; + BIGNUM *order, *tmp; + int ret = SSH_ERR_KEY_INVALID_EC_VALUE; + + if ((bnctx = BN_CTX_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + BN_CTX_start(bnctx); + + if ((order = BN_CTX_get(bnctx)) == NULL || + (tmp = BN_CTX_get(bnctx)) == NULL) { + ret = SSH_ERR_ALLOC_FAIL; + goto out; + } + + /* log2(private) > log2(order)/2 */ + if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, bnctx) != 1) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if (BN_num_bits(EC_KEY_get0_private_key(key)) <= + BN_num_bits(order) / 2) + goto out; + + /* private < order - 1 */ + if (!BN_sub(tmp, order, BN_value_one())) { + ret = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0) + goto out; + ret = 0; + out: + BN_CTX_free(bnctx); + return ret; +} + +void +sshkey_dump_ec_point(const EC_GROUP *group, const EC_POINT *point) +{ + BIGNUM *x, *y; + BN_CTX *bnctx; + + if (point == NULL) { + fputs("point=(NULL)\n", stderr); + return; + } + if ((bnctx = BN_CTX_new()) == NULL) { + fprintf(stderr, "%s: BN_CTX_new failed\n", __func__); + return; + } + BN_CTX_start(bnctx); + if ((x = BN_CTX_get(bnctx)) == NULL || + (y = BN_CTX_get(bnctx)) == NULL) { + fprintf(stderr, "%s: BN_CTX_get failed\n", __func__); + return; + } + if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != + NID_X9_62_prime_field) { + fprintf(stderr, "%s: group is not a prime field\n", __func__); + return; + } + if (EC_POINT_get_affine_coordinates_GFp(group, point, x, y, + bnctx) != 1) { + fprintf(stderr, "%s: EC_POINT_get_affine_coordinates_GFp\n", + __func__); + return; + } + fputs("x=", stderr); + BN_print_fp(stderr, x); + fputs("\ny=", stderr); + BN_print_fp(stderr, y); + fputs("\n", stderr); + BN_CTX_free(bnctx); +} + +void +sshkey_dump_ec_key(const EC_KEY *key) +{ + const BIGNUM *exponent; + + sshkey_dump_ec_point(EC_KEY_get0_group(key), + EC_KEY_get0_public_key(key)); + fputs("exponent=", stderr); + if ((exponent = EC_KEY_get0_private_key(key)) == NULL) + fputs("(NULL)", stderr); + else + BN_print_fp(stderr, EC_KEY_get0_private_key(key)); + fputs("\n", stderr); +} +#endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */ + +static int +sshkey_private_to_blob2(const struct sshkey *prv, struct sshbuf *blob, + const char *passphrase, const char *comment, const char *ciphername, + int rounds) +{ + u_char *cp, *key = NULL, *pubkeyblob = NULL; + u_char salt[SALT_LEN]; + char *b64 = NULL; + size_t i, pubkeylen, keylen, ivlen, blocksize, authlen; + u_int check; + int r = SSH_ERR_INTERNAL_ERROR; + struct sshcipher_ctx ciphercontext; + const struct sshcipher *cipher; + const char *kdfname = KDFNAME; + struct sshbuf *encoded = NULL, *encrypted = NULL, *kdf = NULL; + + memset(&ciphercontext, 0, sizeof(ciphercontext)); + + if (rounds <= 0) + rounds = DEFAULT_ROUNDS; + if (passphrase == NULL || !strlen(passphrase)) { + ciphername = "none"; + kdfname = "none"; + } else if (ciphername == NULL) + ciphername = DEFAULT_CIPHERNAME; + else if (cipher_number(ciphername) != SSH_CIPHER_SSH2) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((cipher = cipher_by_name(ciphername)) == NULL) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } + + if ((kdf = sshbuf_new()) == NULL || + (encoded = sshbuf_new()) == NULL || + (encrypted = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + blocksize = cipher_blocksize(cipher); + keylen = cipher_keylen(cipher); + ivlen = cipher_ivlen(cipher); + authlen = cipher_authlen(cipher); + if ((key = calloc(1, keylen + ivlen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (strcmp(kdfname, "bcrypt") == 0) { + arc4random_buf(salt, SALT_LEN); + if (bcrypt_pbkdf(passphrase, strlen(passphrase), + salt, SALT_LEN, key, keylen + ivlen, rounds) < 0) { + r = SSH_ERR_INVALID_ARGUMENT; + goto out; + } + if ((r = sshbuf_put_string(kdf, salt, SALT_LEN)) != 0 || + (r = sshbuf_put_u32(kdf, rounds)) != 0) + goto out; + } else if (strcmp(kdfname, "none") != 0) { + /* Unsupported KDF type */ + r = SSH_ERR_KEY_UNKNOWN_CIPHER; + goto out; + } + if ((r = cipher_init(&ciphercontext, cipher, key, keylen, + key + keylen, ivlen, 1)) != 0) + goto out; + + if ((r = sshbuf_put(encoded, AUTH_MAGIC, sizeof(AUTH_MAGIC))) != 0 || + (r = sshbuf_put_cstring(encoded, ciphername)) != 0 || + (r = sshbuf_put_cstring(encoded, kdfname)) != 0 || + (r = sshbuf_put_stringb(encoded, kdf)) != 0 || + (r = sshbuf_put_u32(encoded, 1)) != 0 || /* number of keys */ + (r = sshkey_to_blob(prv, &pubkeyblob, &pubkeylen)) != 0 || + (r = sshbuf_put_string(encoded, pubkeyblob, pubkeylen)) != 0) + goto out; + + /* set up the buffer that will be encrypted */ + + /* Random check bytes */ + check = arc4random(); + if ((r = sshbuf_put_u32(encrypted, check)) != 0 || + (r = sshbuf_put_u32(encrypted, check)) != 0) + goto out; + + /* append private key and comment*/ + if ((r = sshkey_private_serialize(prv, encrypted)) != 0 || + (r = sshbuf_put_cstring(encrypted, comment)) != 0) + goto out; + + /* padding */ + i = 0; + while (sshbuf_len(encrypted) % blocksize) { + if ((r = sshbuf_put_u8(encrypted, ++i & 0xff)) != 0) + goto out; + } + + /* length in destination buffer */ + if ((r = sshbuf_put_u32(encoded, sshbuf_len(encrypted))) != 0) + goto out; + + /* encrypt */ + if ((r = sshbuf_reserve(encoded, + sshbuf_len(encrypted) + authlen, &cp)) != 0) + goto out; + if ((r = cipher_crypt(&ciphercontext, 0, cp, + sshbuf_ptr(encrypted), sshbuf_len(encrypted), 0, authlen)) != 0) + goto out; + + /* uuencode */ + if ((b64 = sshbuf_dtob64(encoded)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + + sshbuf_reset(blob); + if ((r = sshbuf_put(blob, MARK_BEGIN, MARK_BEGIN_LEN)) != 0) + goto out; + for (i = 0; i < strlen(b64); i++) { + if ((r = sshbuf_put_u8(blob, b64[i])) != 0) + goto out; + /* insert line breaks */ + if (i % 70 == 69 && (r = sshbuf_put_u8(blob, '\n')) != 0) + goto out; + } + if (i % 70 != 69 && (r = sshbuf_put_u8(blob, '\n')) != 0) + goto out; + if ((r = sshbuf_put(blob, MARK_END, MARK_END_LEN)) != 0) + goto out; + + /* success */ + r = 0; + + out: + sshbuf_free(kdf); + sshbuf_free(encoded); + sshbuf_free(encrypted); + cipher_cleanup(&ciphercontext); + explicit_bzero(salt, sizeof(salt)); + if (key != NULL) { + explicit_bzero(key, keylen + ivlen); + free(key); + } + if (pubkeyblob != NULL) { + explicit_bzero(pubkeyblob, pubkeylen); + free(pubkeyblob); + } + if (b64 != NULL) { + explicit_bzero(b64, strlen(b64)); + free(b64); + } + return r; +} + +static int +sshkey_parse_private2(struct sshbuf *blob, int type, const char *passphrase, + struct sshkey **keyp, char **commentp) +{ + char *comment = NULL, *ciphername = NULL, *kdfname = NULL; + const struct sshcipher *cipher = NULL; + const u_char *cp; + int r = SSH_ERR_INTERNAL_ERROR; + size_t encoded_len; + size_t i, keylen = 0, ivlen = 0, authlen = 0, slen = 0; + struct sshbuf *encoded = NULL, *decoded = NULL; + struct sshbuf *kdf = NULL, *decrypted = NULL; + struct sshcipher_ctx ciphercontext; + struct sshkey *k = NULL; + u_char *key = NULL, *salt = NULL, *dp, pad, last; + u_int blocksize, rounds, nkeys, encrypted_len, check1, check2; + + memset(&ciphercontext, 0, sizeof(ciphercontext)); + if (keyp != NULL) + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + + if ((encoded = sshbuf_new()) == NULL || + (decoded = sshbuf_new()) == NULL || + (decrypted = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + + /* check preamble */ + cp = sshbuf_ptr(blob); + encoded_len = sshbuf_len(blob); + if (encoded_len < (MARK_BEGIN_LEN + MARK_END_LEN) || + memcmp(cp, MARK_BEGIN, MARK_BEGIN_LEN) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + cp += MARK_BEGIN_LEN; + encoded_len -= MARK_BEGIN_LEN; + + /* Look for end marker, removing whitespace as we go */ + while (encoded_len > 0) { + if (*cp != '\n' && *cp != '\r') { + if ((r = sshbuf_put_u8(encoded, *cp)) != 0) + goto out; + } + last = *cp; + encoded_len--; + cp++; + if (last == '\n') { + if (encoded_len >= MARK_END_LEN && + memcmp(cp, MARK_END, MARK_END_LEN) == 0) { + /* \0 terminate */ + if ((r = sshbuf_put_u8(encoded, 0)) != 0) + goto out; + break; + } + } + } + if (encoded_len == 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* decode base64 */ + if ((r = sshbuf_b64tod(decoded, (char *)sshbuf_ptr(encoded))) != 0) + goto out; + + /* check magic */ + if (sshbuf_len(decoded) < sizeof(AUTH_MAGIC) || + memcmp(sshbuf_ptr(decoded), AUTH_MAGIC, sizeof(AUTH_MAGIC))) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + /* parse public portion of key */ + if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 || + (r = sshbuf_get_cstring(decoded, &ciphername, NULL)) != 0 || + (r = sshbuf_get_cstring(decoded, &kdfname, NULL)) != 0 || + (r = sshbuf_froms(decoded, &kdf)) != 0 || + (r = sshbuf_get_u32(decoded, &nkeys)) != 0 || + (r = sshbuf_skip_string(decoded)) != 0 || /* pubkey */ + (r = sshbuf_get_u32(decoded, &encrypted_len)) != 0) + goto out; + + if ((cipher = cipher_by_name(ciphername)) == NULL) { + r = SSH_ERR_KEY_UNKNOWN_CIPHER; + goto out; + } + if ((passphrase == NULL || strlen(passphrase) == 0) && + strcmp(ciphername, "none") != 0) { + /* passphrase required */ + r = SSH_ERR_KEY_WRONG_PASSPHRASE; + goto out; + } + if (strcmp(kdfname, "none") != 0 && strcmp(kdfname, "bcrypt") != 0) { + r = SSH_ERR_KEY_UNKNOWN_CIPHER; + goto out; + } + if (!strcmp(kdfname, "none") && strcmp(ciphername, "none") != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + if (nkeys != 1) { + /* XXX only one key supported */ + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* check size of encrypted key blob */ + blocksize = cipher_blocksize(cipher); + if (encrypted_len < blocksize || (encrypted_len % blocksize) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* setup key */ + keylen = cipher_keylen(cipher); + ivlen = cipher_ivlen(cipher); + authlen = cipher_authlen(cipher); + if ((key = calloc(1, keylen + ivlen)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if (strcmp(kdfname, "bcrypt") == 0) { + if ((r = sshbuf_get_string(kdf, &salt, &slen)) != 0 || + (r = sshbuf_get_u32(kdf, &rounds)) != 0) + goto out; + if (bcrypt_pbkdf(passphrase, strlen(passphrase), salt, slen, + key, keylen + ivlen, rounds) < 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + + /* check that an appropriate amount of auth data is present */ + if (sshbuf_len(decoded) < encrypted_len + authlen) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* decrypt private portion of key */ + if ((r = sshbuf_reserve(decrypted, encrypted_len, &dp)) != 0 || + (r = cipher_init(&ciphercontext, cipher, key, keylen, + key + keylen, ivlen, 0)) != 0) + goto out; + if ((r = cipher_crypt(&ciphercontext, 0, dp, sshbuf_ptr(decoded), + encrypted_len, 0, authlen)) != 0) { + /* an integrity error here indicates an incorrect passphrase */ + if (r == SSH_ERR_MAC_INVALID) + r = SSH_ERR_KEY_WRONG_PASSPHRASE; + goto out; + } + if ((r = sshbuf_consume(decoded, encrypted_len + authlen)) != 0) + goto out; + /* there should be no trailing data */ + if (sshbuf_len(decoded) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + + /* check check bytes */ + if ((r = sshbuf_get_u32(decrypted, &check1)) != 0 || + (r = sshbuf_get_u32(decrypted, &check2)) != 0) + goto out; + if (check1 != check2) { + r = SSH_ERR_KEY_WRONG_PASSPHRASE; + goto out; + } + + /* Load the private key and comment */ + if ((r = sshkey_private_deserialize(decrypted, &k)) != 0 || + (r = sshbuf_get_cstring(decrypted, &comment, NULL)) != 0) + goto out; + + /* Check deterministic padding */ + i = 0; + while (sshbuf_len(decrypted)) { + if ((r = sshbuf_get_u8(decrypted, &pad)) != 0) + goto out; + if (pad != (++i & 0xff)) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + } + + /* XXX decode pubkey and check against private */ + + /* success */ + r = 0; + if (keyp != NULL) { + *keyp = k; + k = NULL; + } + if (commentp != NULL) { + *commentp = comment; + comment = NULL; + } + out: + pad = 0; + cipher_cleanup(&ciphercontext); + free(ciphername); + free(kdfname); + free(comment); + if (salt != NULL) { + explicit_bzero(salt, slen); + free(salt); + } + if (key != NULL) { + explicit_bzero(key, keylen + ivlen); + free(key); + } + sshbuf_free(encoded); + sshbuf_free(decoded); + sshbuf_free(kdf); + sshbuf_free(decrypted); + sshkey_free(k); + return r; +} + +#if WITH_SSH1 +/* + * Serialises the authentication (private) key to a blob, encrypting it with + * passphrase. The identification of the blob (lowest 64 bits of n) will + * precede the key to provide identification of the key without needing a + * passphrase. + */ +static int +sshkey_private_rsa1_to_blob(struct sshkey *key, struct sshbuf *blob, + const char *passphrase, const char *comment) +{ + struct sshbuf *buffer = NULL, *encrypted = NULL; + u_char buf[8]; + int r, cipher_num; + struct sshcipher_ctx ciphercontext; + const struct sshcipher *cipher; + u_char *cp; + + /* + * If the passphrase is empty, use SSH_CIPHER_NONE to ease converting + * to another cipher; otherwise use SSH_AUTHFILE_CIPHER. + */ + cipher_num = (strcmp(passphrase, "") == 0) ? + SSH_CIPHER_NONE : SSH_CIPHER_3DES; + if ((cipher = cipher_by_number(cipher_num)) == NULL) + return SSH_ERR_INTERNAL_ERROR; + + /* This buffer is used to build the secret part of the private key. */ + if ((buffer = sshbuf_new()) == NULL) + return SSH_ERR_ALLOC_FAIL; + + /* Put checkbytes for checking passphrase validity. */ + if ((r = sshbuf_reserve(buffer, 4, &cp)) != 0) + goto out; + arc4random_buf(cp, 2); + memcpy(cp + 2, cp, 2); + + /* + * Store the private key (n and e will not be stored because they + * will be stored in plain text, and storing them also in encrypted + * format would just give known plaintext). + * Note: q and p are stored in reverse order to SSL. + */ + if ((r = sshbuf_put_bignum1(buffer, key->rsa->d)) != 0 || + (r = sshbuf_put_bignum1(buffer, key->rsa->iqmp)) != 0 || + (r = sshbuf_put_bignum1(buffer, key->rsa->q)) != 0 || + (r = sshbuf_put_bignum1(buffer, key->rsa->p)) != 0) + goto out; + + /* Pad the part to be encrypted to a size that is a multiple of 8. */ + explicit_bzero(buf, 8); + if ((r = sshbuf_put(buffer, buf, 8 - (sshbuf_len(buffer) % 8))) != 0) + goto out; + + /* This buffer will be used to contain the data in the file. */ + if ((encrypted = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + + /* First store keyfile id string. */ + if ((r = sshbuf_put(encrypted, LEGACY_BEGIN, + sizeof(LEGACY_BEGIN))) != 0) + goto out; + + /* Store cipher type and "reserved" field. */ + if ((r = sshbuf_put_u8(encrypted, cipher_num)) != 0 || + (r = sshbuf_put_u32(encrypted, 0)) != 0) + goto out; + + /* Store public key. This will be in plain text. */ + if ((r = sshbuf_put_u32(encrypted, BN_num_bits(key->rsa->n))) != 0 || + (r = sshbuf_put_bignum1(encrypted, key->rsa->n) != 0) || + (r = sshbuf_put_bignum1(encrypted, key->rsa->e) != 0) || + (r = sshbuf_put_cstring(encrypted, comment) != 0)) + goto out; + + /* Allocate space for the private part of the key in the buffer. */ + if ((r = sshbuf_reserve(encrypted, sshbuf_len(buffer), &cp)) != 0) + goto out; + + if ((r = cipher_set_key_string(&ciphercontext, cipher, passphrase, + CIPHER_ENCRYPT)) != 0) + goto out; + if ((r = cipher_crypt(&ciphercontext, 0, cp, + sshbuf_ptr(buffer), sshbuf_len(buffer), 0, 0)) != 0) + goto out; + if ((r = cipher_cleanup(&ciphercontext)) != 0) + goto out; + + r = sshbuf_putb(blob, encrypted); + + out: + explicit_bzero(&ciphercontext, sizeof(ciphercontext)); + explicit_bzero(buf, sizeof(buf)); + if (buffer != NULL) + sshbuf_free(buffer); + if (encrypted != NULL) + sshbuf_free(encrypted); + + return r; +} +#endif /* WITH_SSH1 */ + +#ifdef WITH_OPENSSL +/* convert SSH v2 key in OpenSSL PEM format */ +static int +sshkey_private_pem_to_blob(struct sshkey *key, struct sshbuf *blob, + const char *_passphrase, const char *comment) +{ + int success, r; + int blen, len = strlen(_passphrase); + u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL; +#if (OPENSSL_VERSION_NUMBER < 0x00907000L) + const EVP_CIPHER *cipher = (len > 0) ? EVP_des_ede3_cbc() : NULL; +#else + const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL; +#endif + const u_char *bptr; + BIO *bio = NULL; + + if (len > 0 && len <= 4) + return SSH_ERR_PASSPHRASE_TOO_SHORT; + if ((bio = BIO_new(BIO_s_mem())) == NULL) + return SSH_ERR_ALLOC_FAIL; + + switch (key->type) { + case KEY_DSA: + success = PEM_write_bio_DSAPrivateKey(bio, key->dsa, + cipher, passphrase, len, NULL, NULL); + break; +#ifdef OPENSSL_HAS_ECC + case KEY_ECDSA: + success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa, + cipher, passphrase, len, NULL, NULL); + break; +#endif + case KEY_RSA: + success = PEM_write_bio_RSAPrivateKey(bio, key->rsa, + cipher, passphrase, len, NULL, NULL); + break; + default: + success = 0; + break; + } + if (success == 0) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) { + r = SSH_ERR_INTERNAL_ERROR; + goto out; + } + if ((r = sshbuf_put(blob, bptr, blen)) != 0) + goto out; + r = 0; + out: + BIO_free(bio); + return r; +} +#endif /* WITH_OPENSSL */ + +/* Serialise "key" to buffer "blob" */ +int +sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob, + const char *passphrase, const char *comment, + int force_new_format, const char *new_format_cipher, int new_format_rounds) +{ + switch (key->type) { +#ifdef WITH_SSH1 + case KEY_RSA1: + return sshkey_private_rsa1_to_blob(key, blob, + passphrase, comment); +#endif /* WITH_SSH1 */ +#ifdef WITH_OPENSSL + case KEY_DSA: + case KEY_ECDSA: + case KEY_RSA: + if (force_new_format) { + return sshkey_private_to_blob2(key, blob, passphrase, + comment, new_format_cipher, new_format_rounds); + } + return sshkey_private_pem_to_blob(key, blob, + passphrase, comment); +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + return sshkey_private_to_blob2(key, blob, passphrase, + comment, new_format_cipher, new_format_rounds); + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } +} + +#ifdef WITH_SSH1 +/* + * Parse the public, unencrypted portion of a RSA1 key. + */ +int +sshkey_parse_public_rsa1_fileblob(struct sshbuf *blob, + struct sshkey **keyp, char **commentp) +{ + int r; + struct sshkey *pub = NULL; + struct sshbuf *copy = NULL; + + if (keyp != NULL) + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + + /* Check that it is at least big enough to contain the ID string. */ + if (sshbuf_len(blob) < sizeof(LEGACY_BEGIN)) + return SSH_ERR_INVALID_FORMAT; + + /* + * Make sure it begins with the id string. Consume the id string + * from the buffer. + */ + if (memcmp(sshbuf_ptr(blob), LEGACY_BEGIN, sizeof(LEGACY_BEGIN)) != 0) + return SSH_ERR_INVALID_FORMAT; + /* Make a working copy of the keyblob and skip past the magic */ + if ((copy = sshbuf_fromb(blob)) == NULL) + return SSH_ERR_ALLOC_FAIL; + if ((r = sshbuf_consume(copy, sizeof(LEGACY_BEGIN))) != 0) + goto out; + + /* Skip cipher type, reserved data and key bits. */ + if ((r = sshbuf_get_u8(copy, NULL)) != 0 || /* cipher type */ + (r = sshbuf_get_u32(copy, NULL)) != 0 || /* reserved */ + (r = sshbuf_get_u32(copy, NULL)) != 0) /* key bits */ + goto out; + + /* Read the public key from the buffer. */ + if ((pub = sshkey_new(KEY_RSA1)) == NULL || + (r = sshbuf_get_bignum1(copy, pub->rsa->n)) != 0 || + (r = sshbuf_get_bignum1(copy, pub->rsa->e)) != 0) + goto out; + + /* Finally, the comment */ + if ((r = sshbuf_get_string(copy, (u_char**)commentp, NULL)) != 0) + goto out; + + /* The encrypted private part is not parsed by this function. */ + + r = 0; + if (keyp != NULL) + *keyp = pub; + else + sshkey_free(pub); + pub = NULL; + + out: + if (copy != NULL) + sshbuf_free(copy); + if (pub != NULL) + sshkey_free(pub); + return r; +} + +static int +sshkey_parse_private_rsa1(struct sshbuf *blob, const char *passphrase, + struct sshkey **keyp, char **commentp) +{ + int r; + u_int16_t check1, check2; + u_int8_t cipher_type; + struct sshbuf *decrypted = NULL, *copy = NULL; + u_char *cp; + char *comment = NULL; + struct sshcipher_ctx ciphercontext; + const struct sshcipher *cipher; + struct sshkey *prv = NULL; + + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + + /* Check that it is at least big enough to contain the ID string. */ + if (sshbuf_len(blob) < sizeof(LEGACY_BEGIN)) + return SSH_ERR_INVALID_FORMAT; + + /* + * Make sure it begins with the id string. Consume the id string + * from the buffer. + */ + if (memcmp(sshbuf_ptr(blob), LEGACY_BEGIN, sizeof(LEGACY_BEGIN)) != 0) + return SSH_ERR_INVALID_FORMAT; + + if ((prv = sshkey_new_private(KEY_RSA1)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((copy = sshbuf_fromb(blob)) == NULL || + (decrypted = sshbuf_new()) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + if ((r = sshbuf_consume(copy, sizeof(LEGACY_BEGIN))) != 0) + goto out; + + /* Read cipher type. */ + if ((r = sshbuf_get_u8(copy, &cipher_type)) != 0 || + (r = sshbuf_get_u32(copy, NULL)) != 0) /* reserved */ + goto out; + + /* Read the public key and comment from the buffer. */ + if ((r = sshbuf_get_u32(copy, NULL)) != 0 || /* key bits */ + (r = sshbuf_get_bignum1(copy, prv->rsa->n)) != 0 || + (r = sshbuf_get_bignum1(copy, prv->rsa->e)) != 0 || + (r = sshbuf_get_cstring(copy, &comment, NULL)) != 0) + goto out; + + /* Check that it is a supported cipher. */ + cipher = cipher_by_number(cipher_type); + if (cipher == NULL) { + r = SSH_ERR_KEY_UNKNOWN_CIPHER; + goto out; + } + /* Initialize space for decrypted data. */ + if ((r = sshbuf_reserve(decrypted, sshbuf_len(copy), &cp)) != 0) + goto out; + + /* Rest of the buffer is encrypted. Decrypt it using the passphrase. */ + if ((r = cipher_set_key_string(&ciphercontext, cipher, passphrase, + CIPHER_DECRYPT)) != 0) + goto out; + if ((r = cipher_crypt(&ciphercontext, 0, cp, + sshbuf_ptr(copy), sshbuf_len(copy), 0, 0)) != 0) { + cipher_cleanup(&ciphercontext); + goto out; + } + if ((r = cipher_cleanup(&ciphercontext)) != 0) + goto out; + + if ((r = sshbuf_get_u16(decrypted, &check1)) != 0 || + (r = sshbuf_get_u16(decrypted, &check2)) != 0) + goto out; + if (check1 != check2) { + r = SSH_ERR_KEY_WRONG_PASSPHRASE; + goto out; + } + + /* Read the rest of the private key. */ + if ((r = sshbuf_get_bignum1(decrypted, prv->rsa->d)) != 0 || + (r = sshbuf_get_bignum1(decrypted, prv->rsa->iqmp)) != 0 || + (r = sshbuf_get_bignum1(decrypted, prv->rsa->q)) != 0 || + (r = sshbuf_get_bignum1(decrypted, prv->rsa->p)) != 0) + goto out; + + /* calculate p-1 and q-1 */ + if ((r = rsa_generate_additional_parameters(prv->rsa)) != 0) + goto out; + + /* enable blinding */ + if (RSA_blinding_on(prv->rsa, NULL) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + r = 0; + *keyp = prv; + prv = NULL; + if (commentp != NULL) { + *commentp = comment; + comment = NULL; + } + out: + explicit_bzero(&ciphercontext, sizeof(ciphercontext)); + if (comment != NULL) + free(comment); + if (prv != NULL) + sshkey_free(prv); + if (copy != NULL) + sshbuf_free(copy); + if (decrypted != NULL) + sshbuf_free(decrypted); + return r; +} +#endif /* WITH_SSH1 */ + +#ifdef WITH_OPENSSL +static int +sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type, + const char *passphrase, struct sshkey **keyp) +{ + EVP_PKEY *pk = NULL; + struct sshkey *prv = NULL; + BIO *bio = NULL; + int r; + + *keyp = NULL; + + if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX) + return SSH_ERR_ALLOC_FAIL; + if (BIO_write(bio, sshbuf_ptr(blob), sshbuf_len(blob)) != + (int)sshbuf_len(blob)) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + + if ((pk = PEM_read_bio_PrivateKey(bio, NULL, NULL, + (char *)passphrase)) == NULL) { + r = SSH_ERR_KEY_WRONG_PASSPHRASE; + goto out; + } + if (pk->type == EVP_PKEY_RSA && + (type == KEY_UNSPEC || type == KEY_RSA)) { + if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + prv->rsa = EVP_PKEY_get1_RSA(pk); + prv->type = KEY_RSA; +#ifdef DEBUG_PK + RSA_print_fp(stderr, prv->rsa, 8); +#endif + if (RSA_blinding_on(prv->rsa, NULL) != 1) { + r = SSH_ERR_LIBCRYPTO_ERROR; + goto out; + } + } else if (pk->type == EVP_PKEY_DSA && + (type == KEY_UNSPEC || type == KEY_DSA)) { + if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + prv->dsa = EVP_PKEY_get1_DSA(pk); + prv->type = KEY_DSA; +#ifdef DEBUG_PK + DSA_print_fp(stderr, prv->dsa, 8); +#endif +#ifdef OPENSSL_HAS_ECC + } else if (pk->type == EVP_PKEY_EC && + (type == KEY_UNSPEC || type == KEY_ECDSA)) { + if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) { + r = SSH_ERR_ALLOC_FAIL; + goto out; + } + prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk); + prv->type = KEY_ECDSA; + prv->ecdsa_nid = sshkey_ecdsa_key_to_nid(prv->ecdsa); + if (prv->ecdsa_nid == -1 || + sshkey_curve_nid_to_name(prv->ecdsa_nid) == NULL || + sshkey_ec_validate_public(EC_KEY_get0_group(prv->ecdsa), + EC_KEY_get0_public_key(prv->ecdsa)) != 0 || + sshkey_ec_validate_private(prv->ecdsa) != 0) { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } +# ifdef DEBUG_PK + if (prv != NULL && prv->ecdsa != NULL) + sshkey_dump_ec_key(prv->ecdsa); +# endif +#endif /* OPENSSL_HAS_ECC */ + } else { + r = SSH_ERR_INVALID_FORMAT; + goto out; + } + r = 0; + *keyp = prv; + prv = NULL; + out: + BIO_free(bio); + if (pk != NULL) + EVP_PKEY_free(pk); + if (prv != NULL) + sshkey_free(prv); + return r; +} +#endif /* WITH_OPENSSL */ + +int +sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type, + const char *passphrase, struct sshkey **keyp, char **commentp) +{ + int r; + + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + + switch (type) { +#ifdef WITH_SSH1 + case KEY_RSA1: + return sshkey_parse_private_rsa1(blob, passphrase, + keyp, commentp); +#endif /* WITH_SSH1 */ +#ifdef WITH_OPENSSL + case KEY_DSA: + case KEY_ECDSA: + case KEY_RSA: + return sshkey_parse_private_pem_fileblob(blob, type, + passphrase, keyp); +#endif /* WITH_OPENSSL */ + case KEY_ED25519: + return sshkey_parse_private2(blob, type, passphrase, + keyp, commentp); + case KEY_UNSPEC: + if ((r = sshkey_parse_private2(blob, type, passphrase, keyp, + commentp)) == 0) + return 0; +#ifdef WITH_OPENSSL + return sshkey_parse_private_pem_fileblob(blob, type, + passphrase, keyp); +#else + return SSH_ERR_INVALID_FORMAT; +#endif /* WITH_OPENSSL */ + default: + return SSH_ERR_KEY_TYPE_UNKNOWN; + } +} + +int +sshkey_parse_private_fileblob(struct sshbuf *buffer, const char *passphrase, + const char *filename, struct sshkey **keyp, char **commentp) +{ + int r; + + if (keyp != NULL) + *keyp = NULL; + if (commentp != NULL) + *commentp = NULL; + +#ifdef WITH_SSH1 + /* it's a SSH v1 key if the public key part is readable */ + if ((r = sshkey_parse_public_rsa1_fileblob(buffer, NULL, NULL)) == 0) { + return sshkey_parse_private_fileblob_type(buffer, KEY_RSA1, + passphrase, keyp, commentp); + } +#endif /* WITH_SSH1 */ + if ((r = sshkey_parse_private_fileblob_type(buffer, KEY_UNSPEC, + passphrase, keyp, commentp)) == 0) + return 0; + return r; +} diff --git a/sshkey.h b/sshkey.h new file mode 100644 index 0000000..c8d3cdd --- /dev/null +++ b/sshkey.h @@ -0,0 +1,229 @@ +/* $OpenBSD: sshkey.h,v 1.9 2015/08/04 05:23:06 djm Exp $ */ + +/* + * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef SSHKEY_H +#define SSHKEY_H + +#include + +#ifdef WITH_OPENSSL +#include +#include +# ifdef OPENSSL_HAS_ECC +# include +# else /* OPENSSL_HAS_ECC */ +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +# endif /* OPENSSL_HAS_ECC */ +#else /* WITH_OPENSSL */ +# define RSA void +# define DSA void +# define EC_KEY void +# define EC_GROUP void +# define EC_POINT void +#endif /* WITH_OPENSSL */ + +#define SSH_RSA_MINIMUM_MODULUS_SIZE 768 +#define SSH_KEY_MAX_SIGN_DATA_SIZE (1 << 20) + +struct sshbuf; + +/* Key types */ +enum sshkey_types { + KEY_RSA1, + KEY_RSA, + KEY_DSA, + KEY_ECDSA, + KEY_ED25519, + KEY_RSA_CERT, + KEY_DSA_CERT, + KEY_ECDSA_CERT, + KEY_ED25519_CERT, + KEY_UNSPEC +}; + +/* Default fingerprint hash */ +#define SSH_FP_HASH_DEFAULT SSH_DIGEST_SHA256 + +/* Fingerprint representation formats */ +enum sshkey_fp_rep { + SSH_FP_DEFAULT = 0, + SSH_FP_HEX, + SSH_FP_BASE64, + SSH_FP_BUBBLEBABBLE, + SSH_FP_RANDOMART +}; + +/* key is stored in external hardware */ +#define SSHKEY_FLAG_EXT 0x0001 + +#define SSHKEY_CERT_MAX_PRINCIPALS 256 +/* XXX opaquify? */ +struct sshkey_cert { + struct sshbuf *certblob; /* Kept around for use on wire */ + u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */ + u_int64_t serial; + char *key_id; + u_int nprincipals; + char **principals; + u_int64_t valid_after, valid_before; + struct sshbuf *critical; + struct sshbuf *extensions; + struct sshkey *signature_key; +}; + +/* XXX opaquify? */ +struct sshkey { + int type; + int flags; + RSA *rsa; + DSA *dsa; + int ecdsa_nid; /* NID of curve */ + EC_KEY *ecdsa; + u_char *ed25519_sk; + u_char *ed25519_pk; + struct sshkey_cert *cert; +}; + +#define ED25519_SK_SZ crypto_sign_ed25519_SECRETKEYBYTES +#define ED25519_PK_SZ crypto_sign_ed25519_PUBLICKEYBYTES + +struct sshkey *sshkey_new(int); +int sshkey_add_private(struct sshkey *); +struct sshkey *sshkey_new_private(int); +void sshkey_free(struct sshkey *); +int sshkey_demote(const struct sshkey *, struct sshkey **); +int sshkey_equal_public(const struct sshkey *, + const struct sshkey *); +int sshkey_equal(const struct sshkey *, const struct sshkey *); +char *sshkey_fingerprint(const struct sshkey *, + int, enum sshkey_fp_rep); +int sshkey_fingerprint_raw(const struct sshkey *k, + int, u_char **retp, size_t *lenp); +const char *sshkey_type(const struct sshkey *); +const char *sshkey_cert_type(const struct sshkey *); +int sshkey_write(const struct sshkey *, FILE *); +int sshkey_read(struct sshkey *, char **); +u_int sshkey_size(const struct sshkey *); + +int sshkey_generate(int type, u_int bits, struct sshkey **keyp); +int sshkey_from_private(const struct sshkey *, struct sshkey **); +int sshkey_type_from_name(const char *); +int sshkey_is_cert(const struct sshkey *); +int sshkey_type_is_cert(int); +int sshkey_type_plain(int); +int sshkey_to_certified(struct sshkey *); +int sshkey_drop_cert(struct sshkey *); +int sshkey_certify(struct sshkey *, struct sshkey *); +int sshkey_cert_copy(const struct sshkey *, struct sshkey *); +int sshkey_cert_check_authority(const struct sshkey *, int, int, + const char *, const char **); + +int sshkey_ecdsa_nid_from_name(const char *); +int sshkey_curve_name_to_nid(const char *); +const char * sshkey_curve_nid_to_name(int); +u_int sshkey_curve_nid_to_bits(int); +int sshkey_ecdsa_bits_to_nid(int); +int sshkey_ecdsa_key_to_nid(EC_KEY *); +int sshkey_ec_nid_to_hash_alg(int nid); +int sshkey_ec_validate_public(const EC_GROUP *, const EC_POINT *); +int sshkey_ec_validate_private(const EC_KEY *); +const char *sshkey_ssh_name(const struct sshkey *); +const char *sshkey_ssh_name_plain(const struct sshkey *); +int sshkey_names_valid2(const char *, int); +char *key_alg_list(int, int); + +int sshkey_from_blob(const u_char *, size_t, struct sshkey **); +int sshkey_fromb(struct sshbuf *, struct sshkey **); +int sshkey_froms(struct sshbuf *, struct sshkey **); +int sshkey_to_blob(const struct sshkey *, u_char **, size_t *); +int sshkey_to_base64(const struct sshkey *, char **); +int sshkey_putb(const struct sshkey *, struct sshbuf *); +int sshkey_puts(const struct sshkey *, struct sshbuf *); +int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *); +int sshkey_putb_plain(const struct sshkey *, struct sshbuf *); + +int sshkey_sign(const struct sshkey *, u_char **, size_t *, + const u_char *, size_t, u_int); +int sshkey_verify(const struct sshkey *, const u_char *, size_t, + const u_char *, size_t, u_int); + +/* for debug */ +void sshkey_dump_ec_point(const EC_GROUP *, const EC_POINT *); +void sshkey_dump_ec_key(const EC_KEY *); + +/* private key parsing and serialisation */ +int sshkey_private_serialize(const struct sshkey *key, struct sshbuf *buf); +int sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **keyp); + +/* private key file format parsing and serialisation */ +int sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob, + const char *passphrase, const char *comment, + int force_new_format, const char *new_format_cipher, int new_format_rounds); +int sshkey_parse_public_rsa1_fileblob(struct sshbuf *blob, + struct sshkey **keyp, char **commentp); +int sshkey_parse_private_fileblob(struct sshbuf *buffer, + const char *passphrase, const char *filename, struct sshkey **keyp, + char **commentp); +int sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type, + const char *passphrase, struct sshkey **keyp, char **commentp); + +#ifdef SSHKEY_INTERNAL +int ssh_rsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat); +int ssh_rsa_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat); +int ssh_dss_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat); +int ssh_dss_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat); +int ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat); +int ssh_ecdsa_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat); +int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, + const u_char *data, size_t datalen, u_int compat); +int ssh_ed25519_verify(const struct sshkey *key, + const u_char *signature, size_t signaturelen, + const u_char *data, size_t datalen, u_int compat); +#endif + +#if !defined(WITH_OPENSSL) +# undef RSA +# undef DSA +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#elif !defined(OPENSSL_HAS_ECC) +# undef EC_KEY +# undef EC_GROUP +# undef EC_POINT +#endif + +#endif /* SSHKEY_H */ diff --git a/sshlogin.c b/sshlogin.c index 54629f7..818312f 100644 --- a/sshlogin.c +++ b/sshlogin.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshlogin.c,v 1.27 2011/01/11 06:06:09 djm Exp $ */ +/* $OpenBSD: sshlogin.c,v 1.31 2015/01/20 23:14:00 deraadt Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -42,7 +42,6 @@ #include "includes.h" #include -#include #include #include @@ -54,10 +53,12 @@ #include #include #include +#include #include "loginrec.h" #include "log.h" #include "buffer.h" +#include "misc.h" #include "servconf.h" extern Buffer loginmsg; @@ -87,7 +88,7 @@ static void store_lastlog_message(const char *user, uid_t uid) { #ifndef NO_SSH_LASTLOG - char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512]; + char *time_string, hostname[HOST_NAME_MAX+1] = "", buf[512]; time_t last_login_time; if (!options.print_lastlog) @@ -97,7 +98,7 @@ store_lastlog_message(const char *user, uid_t uid) time_string = sys_auth_get_lastlogin_msg(user, uid); if (time_string != NULL) { buffer_append(&loginmsg, time_string, strlen(time_string)); - xfree(time_string); + free(time_string); } # else last_login_time = get_last_login_time(uid, user, hostname, diff --git a/sshlogin.h b/sshlogin.h index 500d3fe..52119a9 100644 --- a/sshlogin.h +++ b/sshlogin.h @@ -15,7 +15,7 @@ void record_login(pid_t, const char *, const char *, uid_t, const char *, struct sockaddr *, socklen_t); void record_logout(pid_t, const char *, const char *); -time_t get_last_login_time(uid_t, const char *, char *, u_int); +time_t get_last_login_time(uid_t, const char *, char *, size_t); #ifdef LOGIN_NEEDS_UTMPX void record_utmp_only(pid_t, const char *, const char *, const char *, diff --git a/sshpty.c b/sshpty.c index 06c392a..e794566 100644 --- a/sshpty.c +++ b/sshpty.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sshpty.c,v 1.28 2007/09/11 23:49:09 stevesk Exp $ */ +/* $OpenBSD: sshpty.c,v 1.30 2015/07/30 23:09:15 djm Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -105,12 +105,12 @@ void pty_release(const char *tty) { #ifndef WIN32_FIXME -#ifndef __APPLE_PRIVPTY__ +#if !defined(__APPLE_PRIVPTY__) && !defined(HAVE_OPENPTY) if (chown(tty, (uid_t) 0, (gid_t) 0) < 0) error("chown %.100s 0 0 failed: %.100s", tty, strerror(errno)); if (chmod(tty, (mode_t) 0666) < 0) error("chmod %.100s 0666 failed: %.100s", tty, strerror(errno)); -#endif /* __APPLE_PRIVPTY__ */ +#endif /* !__APPLE_PRIVPTY__ && !HAVE_OPENPTY */ #endif } @@ -121,9 +121,6 @@ pty_make_controlling_tty(int *ttyfd, const char *tty) { #ifndef WIN32_FIXME int fd; -#ifdef USE_VHANGUP - void *old; -#endif /* USE_VHANGUP */ #ifdef _UNICOS if (setsid() < 0) @@ -179,21 +176,11 @@ pty_make_controlling_tty(int *ttyfd, const char *tty) if (setpgrp(0,0) < 0) error("SETPGRP %s",strerror(errno)); #endif /* NEED_SETPGRP */ -#ifdef USE_VHANGUP - old = signal(SIGHUP, SIG_IGN); - vhangup(); - signal(SIGHUP, old); -#endif /* USE_VHANGUP */ fd = open(tty, O_RDWR); if (fd < 0) { error("%.100s: %.100s", tty, strerror(errno)); } else { -#ifdef USE_VHANGUP - close(*ttyfd); - *ttyfd = fd; -#else /* USE_VHANGUP */ close(fd); -#endif /* USE_VHANGUP */ } /* Verify that we now have a controlling tty. */ fd = open(_PATH_TTY, O_WRONLY); @@ -235,13 +222,8 @@ pty_setowner(struct passwd *pw, const char *tty) /* Determine the group to make the owner of the tty. */ grp = getgrnam("tty"); - if (grp) { - gid = grp->gr_gid; - mode = S_IRUSR | S_IWUSR | S_IWGRP; - } else { - gid = pw->pw_gid; - mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; - } + gid = (grp != NULL) ? grp->gr_gid : pw->pw_gid; + mode = (grp != NULL) ? 0620 : 0600; /* * Change owner and mode of the tty as required. diff --git a/sshtty.c b/sshtty.c index 09f6507..8b8d485 100644 --- a/sshtty.c +++ b/sshtty.c @@ -53,7 +53,6 @@ get_saved_tio(void) #ifdef WIN32_FIXME DebugBreak(); #endif - return _in_raw_mode ? &_saved_tio : NULL; } diff --git a/uidswap.c b/uidswap.c index 967aaef..844527d 100644 --- a/uidswap.c +++ b/uidswap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uidswap.c,v 1.35 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: uidswap.c,v 1.39 2015/06/24 01:49:19 dtucker Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -14,12 +14,13 @@ #include "includes.h" -#include #include #include #include #include +#include #include +#include #include @@ -86,13 +87,12 @@ temporarily_use_uid(struct passwd *pw) if (saved_egroupslen < 0) fatal("getgroups: %.100s", strerror(errno)); if (saved_egroupslen > 0) { - saved_egroups = xrealloc(saved_egroups, + saved_egroups = xreallocarray(saved_egroups, saved_egroupslen, sizeof(gid_t)); if (getgroups(saved_egroupslen, saved_egroups) < 0) fatal("getgroups: %.100s", strerror(errno)); } else { /* saved_egroupslen == 0 */ - if (saved_egroups != NULL) - xfree(saved_egroups); + free(saved_egroups); } /* set and save the user's groups */ @@ -105,13 +105,12 @@ temporarily_use_uid(struct passwd *pw) if (user_groupslen < 0) fatal("getgroups: %.100s", strerror(errno)); if (user_groupslen > 0) { - user_groups = xrealloc(user_groups, + user_groups = xreallocarray(user_groups, user_groupslen, sizeof(gid_t)); if (getgroups(user_groupslen, user_groups) < 0) fatal("getgroups: %.100s", strerror(errno)); } else { /* user_groupslen == 0 */ - if (user_groups) - xfree(user_groups); + free(user_groups); } } /* Set the effective uid to the given (unprivileged) uid. */ @@ -137,23 +136,13 @@ temporarily_use_uid(struct passwd *pw) void permanently_drop_suid(uid_t uid) { +#ifndef HAVE_CYGWIN uid_t old_uid = getuid(); +#endif debug("permanently_drop_suid: %u", (u_int)uid); -#if defined(HAVE_SETRESUID) && !defined(BROKEN_SETRESUID) if (setresuid(uid, uid, uid) < 0) fatal("setresuid %u: %.100s", (u_int)uid, strerror(errno)); -#elif defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID) - if (setreuid(uid, uid) < 0) - fatal("setreuid %u: %.100s", (u_int)uid, strerror(errno)); -#else -# ifndef SETEUID_BREAKS_SETUID - if (seteuid(uid) < 0) - fatal("seteuid %u: %.100s", (u_int)uid, strerror(errno)); -# endif - if (setuid(uid) < 0) - fatal("setuid %u: %.100s", (u_int)uid, strerror(errno)); -#endif #ifndef HAVE_CYGWIN /* Try restoration of UID if changed (test clearing of saved uid) */ @@ -214,8 +203,10 @@ restore_uid(void) void permanently_set_uid(struct passwd *pw) { +#ifndef HAVE_CYGWIN uid_t old_uid = getuid(); gid_t old_gid = getgid(); +#endif if (pw == NULL) fatal("permanently_set_uid: no user given"); @@ -224,18 +215,8 @@ permanently_set_uid(struct passwd *pw) debug("permanently_set_uid: %u/%u", (u_int)pw->pw_uid, (u_int)pw->pw_gid); -#if defined(HAVE_SETRESGID) && !defined(BROKEN_SETRESGID) if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) < 0) fatal("setresgid %u: %.100s", (u_int)pw->pw_gid, strerror(errno)); -#elif defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID) - if (setregid(pw->pw_gid, pw->pw_gid) < 0) - fatal("setregid %u: %.100s", (u_int)pw->pw_gid, strerror(errno)); -#else - if (setegid(pw->pw_gid) < 0) - fatal("setegid %u: %.100s", (u_int)pw->pw_gid, strerror(errno)); - if (setgid(pw->pw_gid) < 0) - fatal("setgid %u: %.100s", (u_int)pw->pw_gid, strerror(errno)); -#endif #ifdef __APPLE__ /* @@ -247,20 +228,8 @@ permanently_set_uid(struct passwd *pw) pw->pw_name, (u_int)pw->pw_gid, strerror(errno)); #endif -#if defined(HAVE_SETRESUID) && !defined(BROKEN_SETRESUID) if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) < 0) fatal("setresuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno)); -#elif defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID) - if (setreuid(pw->pw_uid, pw->pw_uid) < 0) - fatal("setreuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno)); -#else -# ifndef SETEUID_BREAKS_SETUID - if (seteuid(pw->pw_uid) < 0) - fatal("seteuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno)); -# endif - if (setuid(pw->pw_uid) < 0) - fatal("setuid %u: %.100s", (u_int)pw->pw_uid, strerror(errno)); -#endif #ifndef HAVE_CYGWIN /* Try restoration of GID if changed (test clearing of saved gid) */ diff --git a/umac.c b/umac.c index 92902bc..6eb55b2 100644 --- a/umac.c +++ b/umac.c @@ -1,4 +1,4 @@ -/* $OpenBSD: umac.c,v 1.3 2008/05/12 20:52:20 pvalchev Exp $ */ +/* $OpenBSD: umac.c,v 1.11 2014/07/22 07:13:42 guenther Exp $ */ /* ----------------------------------------------------------------------- * * umac.c -- C Implementation UMAC Message Authentication @@ -52,7 +52,15 @@ /* --- User Switches ---------------------------------------------------- */ /* ---------------------------------------------------------------------- */ +#ifndef UMAC_OUTPUT_LEN #define UMAC_OUTPUT_LEN 8 /* Alowable: 4, 8, 12, 16 */ +#endif + +#if UMAC_OUTPUT_LEN != 4 && UMAC_OUTPUT_LEN != 8 && \ + UMAC_OUTPUT_LEN != 12 && UMAC_OUTPUT_LEN != 16 +# error UMAC_OUTPUT_LEN must be defined to 4, 8, 12 or 16 +#endif + /* #define FORCE_C_ONLY 1 ANSI C and 64-bit integers req'd */ /* #define AES_IMPLEMENTAION 1 1 = OpenSSL, 2 = Barreto, 3 = Gladman */ /* #define SSE2 0 Is SSE2 is available? */ @@ -65,12 +73,14 @@ #include "includes.h" #include +#include +#include +#include +#include #include "xmalloc.h" #include "umac.h" -#include -#include -#include +#include "misc.h" /* ---------------------------------------------------------------------- */ /* --- Primitive Data Types --- */ @@ -123,41 +133,17 @@ typedef unsigned int UWORD; /* Register */ /* --- Endian Conversion --- Forcing assembly on some platforms */ /* ---------------------------------------------------------------------- */ -#if HAVE_SWAP32 -#define LOAD_UINT32_REVERSED(p) (swap32(*(UINT32 *)(p))) -#define STORE_UINT32_REVERSED(p,v) (*(UINT32 *)(p) = swap32(v)) -#else /* HAVE_SWAP32 */ - -static UINT32 LOAD_UINT32_REVERSED(void *ptr) -{ - UINT32 temp = *(UINT32 *)ptr; - temp = (temp >> 24) | ((temp & 0x00FF0000) >> 8 ) - | ((temp & 0x0000FF00) << 8 ) | (temp << 24); - return (UINT32)temp; -} - -# if (__LITTLE_ENDIAN__) -static void STORE_UINT32_REVERSED(void *ptr, UINT32 x) -{ - UINT32 i = (UINT32)x; - *(UINT32 *)ptr = (i >> 24) | ((i & 0x00FF0000) >> 8 ) - | ((i & 0x0000FF00) << 8 ) | (i << 24); -} -# endif /* __LITTLE_ENDIAN */ -#endif /* HAVE_SWAP32 */ - -/* The following definitions use the above reversal-primitives to do the right - * thing on endian specific load and stores. - */ - #if (__LITTLE_ENDIAN__) -#define LOAD_UINT32_LITTLE(ptr) (*(UINT32 *)(ptr)) -#define STORE_UINT32_BIG(ptr,x) STORE_UINT32_REVERSED(ptr,x) +#define LOAD_UINT32_REVERSED(p) get_u32(p) +#define STORE_UINT32_REVERSED(p,v) put_u32(p,v) #else -#define LOAD_UINT32_LITTLE(ptr) LOAD_UINT32_REVERSED(ptr) -#define STORE_UINT32_BIG(ptr,x) (*(UINT32 *)(ptr) = (UINT32)(x)) +#define LOAD_UINT32_REVERSED(p) get_u32_le(p) +#define STORE_UINT32_REVERSED(p,v) put_u32_le(p,v) #endif +#define LOAD_UINT32_LITTLE(p) (get_u32_le(p)) +#define STORE_UINT32_BIG(p,v) put_u32(p, v) + /* ---------------------------------------------------------------------- */ /* ---------------------------------------------------------------------- */ /* ----- Begin KDF & PDF Section ---------------------------------------- */ @@ -168,6 +154,7 @@ static void STORE_UINT32_REVERSED(void *ptr, UINT32 x) #define AES_BLOCK_LEN 16 /* OpenSSL's AES */ +#ifdef WITH_OPENSSL #include "openbsd-compat/openssl-compat.h" #ifndef USE_BUILTIN_RIJNDAEL # include @@ -176,7 +163,17 @@ typedef AES_KEY aes_int_key[1]; #define aes_encryption(in,out,int_key) \ AES_encrypt((u_char *)(in),(u_char *)(out),(AES_KEY *)int_key) #define aes_key_setup(key,int_key) \ - AES_set_encrypt_key((u_char *)(key),UMAC_KEY_LEN*8,int_key) + AES_set_encrypt_key((const u_char *)(key),UMAC_KEY_LEN*8,int_key) +#else +#include "rijndael.h" +#define AES_ROUNDS ((UMAC_KEY_LEN / 4) + 6) +typedef UINT8 aes_int_key[AES_ROUNDS+1][4][4]; /* AES internal */ +#define aes_encryption(in,out,int_key) \ + rijndaelEncrypt((u32 *)(int_key), AES_ROUNDS, (u8 *)(in), (u8 *)(out)) +#define aes_key_setup(key,int_key) \ + rijndaelKeySetupEnc((u32 *)(int_key), (const unsigned char *)(key), \ + UMAC_KEY_LEN*8) +#endif /* The user-supplied UMAC key is stretched using AES in a counter * mode to supply all random bits needed by UMAC. The kdf function takes @@ -232,7 +229,7 @@ static void pdf_init(pdf_ctx *pc, aes_int_key prf_key) aes_encryption(pc->nonce, pc->cache, pc->prf_key); } -static void pdf_gen_xor(pdf_ctx *pc, UINT8 nonce[8], UINT8 buf[8]) +static void pdf_gen_xor(pdf_ctx *pc, const UINT8 nonce[8], UINT8 buf[8]) { /* 'ndx' indicates that we'll be using the 0th or 1st eight bytes * of the AES output. If last time around we returned the ndx-1st @@ -246,19 +243,21 @@ static void pdf_gen_xor(pdf_ctx *pc, UINT8 nonce[8], UINT8 buf[8]) #elif (UMAC_OUTPUT_LEN > 8) #define LOW_BIT_MASK 0 #endif - - UINT8 tmp_nonce_lo[4]; + union { + UINT8 tmp_nonce_lo[4]; + UINT32 align; + } t; #if LOW_BIT_MASK != 0 int ndx = nonce[7] & LOW_BIT_MASK; #endif - *(UINT32 *)tmp_nonce_lo = ((UINT32 *)nonce)[1]; - tmp_nonce_lo[3] &= ~LOW_BIT_MASK; /* zero last bit */ + *(UINT32 *)t.tmp_nonce_lo = ((const UINT32 *)nonce)[1]; + t.tmp_nonce_lo[3] &= ~LOW_BIT_MASK; /* zero last bit */ - if ( (((UINT32 *)tmp_nonce_lo)[0] != ((UINT32 *)pc->nonce)[1]) || - (((UINT32 *)nonce)[0] != ((UINT32 *)pc->nonce)[0]) ) + if ( (((UINT32 *)t.tmp_nonce_lo)[0] != ((UINT32 *)pc->nonce)[1]) || + (((const UINT32 *)nonce)[0] != ((UINT32 *)pc->nonce)[0]) ) { - ((UINT32 *)pc->nonce)[0] = ((UINT32 *)nonce)[0]; - ((UINT32 *)pc->nonce)[1] = ((UINT32 *)tmp_nonce_lo)[0]; + ((UINT32 *)pc->nonce)[0] = ((const UINT32 *)nonce)[0]; + ((UINT32 *)pc->nonce)[1] = ((UINT32 *)t.tmp_nonce_lo)[0]; aes_encryption(pc->nonce, pc->cache, pc->prf_key); } @@ -316,7 +315,7 @@ static void pdf_gen_xor(pdf_ctx *pc, UINT8 nonce[8], UINT8 buf[8]) typedef struct { UINT8 nh_key [L1_KEY_LEN + L1_KEY_SHIFT * (STREAMS - 1)]; /* NH Key */ - UINT8 data [HASH_BUF_BYTES]; /* Incomming data buffer */ + UINT8 data [HASH_BUF_BYTES]; /* Incoming data buffer */ int next_data_empty; /* Bookeeping variable for data buffer. */ int bytes_hashed; /* Bytes (out of L1_KEY_LEN) incorperated. */ UINT64 state[STREAMS]; /* on-line state */ @@ -325,7 +324,7 @@ typedef struct { #if (UMAC_OUTPUT_LEN == 4) -static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) +static void nh_aux(void *kp, const void *dp, void *hp, UINT32 dlen) /* NH hashing primitive. Previous (partial) hash result is loaded and * then stored via hp pointer. The length of the data pointed at by "dp", * "dlen", is guaranteed to be divisible by L1_PAD_BOUNDARY (32). Key @@ -335,7 +334,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) UINT64 h; UWORD c = dlen / 32; UINT32 *k = (UINT32 *)kp; - UINT32 *d = (UINT32 *)dp; + const UINT32 *d = (const UINT32 *)dp; UINT32 d0,d1,d2,d3,d4,d5,d6,d7; UINT32 k0,k1,k2,k3,k4,k5,k6,k7; @@ -360,7 +359,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) #elif (UMAC_OUTPUT_LEN == 8) -static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) +static void nh_aux(void *kp, const void *dp, void *hp, UINT32 dlen) /* Same as previous nh_aux, but two streams are handled in one pass, * reading and writing 16 bytes of hash-state per call. */ @@ -368,7 +367,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) UINT64 h1,h2; UWORD c = dlen / 32; UINT32 *k = (UINT32 *)kp; - UINT32 *d = (UINT32 *)dp; + const UINT32 *d = (const UINT32 *)dp; UINT32 d0,d1,d2,d3,d4,d5,d6,d7; UINT32 k0,k1,k2,k3,k4,k5,k6,k7, k8,k9,k10,k11; @@ -407,7 +406,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) #elif (UMAC_OUTPUT_LEN == 12) -static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) +static void nh_aux(void *kp, const void *dp, void *hp, UINT32 dlen) /* Same as previous nh_aux, but two streams are handled in one pass, * reading and writing 24 bytes of hash-state per call. */ @@ -415,7 +414,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) UINT64 h1,h2,h3; UWORD c = dlen / 32; UINT32 *k = (UINT32 *)kp; - UINT32 *d = (UINT32 *)dp; + const UINT32 *d = (const UINT32 *)dp; UINT32 d0,d1,d2,d3,d4,d5,d6,d7; UINT32 k0,k1,k2,k3,k4,k5,k6,k7, k8,k9,k10,k11,k12,k13,k14,k15; @@ -462,7 +461,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) #elif (UMAC_OUTPUT_LEN == 16) -static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) +static void nh_aux(void *kp, const void *dp, void *hp, UINT32 dlen) /* Same as previous nh_aux, but two streams are handled in one pass, * reading and writing 24 bytes of hash-state per call. */ @@ -470,7 +469,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) UINT64 h1,h2,h3,h4; UWORD c = dlen / 32; UINT32 *k = (UINT32 *)kp; - UINT32 *d = (UINT32 *)dp; + const UINT32 *d = (const UINT32 *)dp; UINT32 d0,d1,d2,d3,d4,d5,d6,d7; UINT32 k0,k1,k2,k3,k4,k5,k6,k7, k8,k9,k10,k11,k12,k13,k14,k15, @@ -531,7 +530,7 @@ static void nh_aux(void *kp, void *dp, void *hp, UINT32 dlen) /* ---------------------------------------------------------------------- */ -static void nh_transform(nh_ctx *hc, UINT8 *buf, UINT32 nbytes) +static void nh_transform(nh_ctx *hc, const UINT8 *buf, UINT32 nbytes) /* This function is a wrapper for the primitive NH hash functions. It takes * as argument "hc" the current hash context and a buffer which must be a * multiple of L1_PAD_BOUNDARY. The key passed to nh_aux is offset @@ -606,7 +605,7 @@ static void nh_init(nh_ctx *hc, aes_int_key prf_key) /* ---------------------------------------------------------------------- */ -static void nh_update(nh_ctx *hc, UINT8 *buf, UINT32 nbytes) +static void nh_update(nh_ctx *hc, const UINT8 *buf, UINT32 nbytes) /* Incorporate nbytes of data into a nh_ctx, buffer whatever is not an */ /* even multiple of HASH_BUF_BYTES. */ { @@ -701,7 +700,7 @@ static void nh_final(nh_ctx *hc, UINT8 *result) /* ---------------------------------------------------------------------- */ -static void nh(nh_ctx *hc, UINT8 *buf, UINT32 padded_len, +static void nh(nh_ctx *hc, const UINT8 *buf, UINT32 padded_len, UINT32 unpadded_len, UINT8 *result) /* All-in-one nh_update() and nh_final() equivalent. * Assumes that padded_len is divisible by L1_PAD_BOUNDARY and result is @@ -1039,7 +1038,7 @@ static int uhash_free(uhash_ctx_t ctx) #endif /* ---------------------------------------------------------------------- */ -static int uhash_update(uhash_ctx_t ctx, u_char *input, long len) +static int uhash_update(uhash_ctx_t ctx, const u_char *input, long len) /* Given len bytes of data, we parse it into L1_KEY_LEN chunks and * hash each one with NH, calling the polyhash on each NH output. */ @@ -1049,7 +1048,7 @@ static int uhash_update(uhash_ctx_t ctx, u_char *input, long len) UINT8 *nh_result = (UINT8 *)&result_buf; if (ctx->msg_len + len <= L1_KEY_LEN) { - nh_update(&ctx->hash, (UINT8 *)input, len); + nh_update(&ctx->hash, (const UINT8 *)input, len); ctx->msg_len += len; } else { @@ -1064,7 +1063,7 @@ static int uhash_update(uhash_ctx_t ctx, u_char *input, long len) /* bytes to complete the current nh_block. */ if (bytes_hashed) { bytes_remaining = (L1_KEY_LEN - bytes_hashed); - nh_update(&ctx->hash, (UINT8 *)input, bytes_remaining); + nh_update(&ctx->hash, (const UINT8 *)input, bytes_remaining); nh_final(&ctx->hash, nh_result); ctx->msg_len += bytes_remaining; poly_hash(ctx,(UINT32 *)nh_result); @@ -1074,7 +1073,7 @@ static int uhash_update(uhash_ctx_t ctx, u_char *input, long len) /* Hash directly from input stream if enough bytes */ while (len >= L1_KEY_LEN) { - nh(&ctx->hash, (UINT8 *)input, L1_KEY_LEN, + nh(&ctx->hash, (const UINT8 *)input, L1_KEY_LEN, L1_KEY_LEN, nh_result); ctx->msg_len += L1_KEY_LEN; len -= L1_KEY_LEN; @@ -1085,7 +1084,7 @@ static int uhash_update(uhash_ctx_t ctx, u_char *input, long len) /* pass remaining < L1_KEY_LEN bytes of input data to NH */ if (len) { - nh_update(&ctx->hash, (UINT8 *)input, len); + nh_update(&ctx->hash, (const UINT8 *)input, len); ctx->msg_len += len; } } @@ -1201,14 +1200,14 @@ int umac_delete(struct umac_ctx *ctx) if (ctx) { if (ALLOC_BOUNDARY) ctx = (struct umac_ctx *)ctx->free_ptr; - xfree(ctx); + free(ctx); } return (1); } /* ---------------------------------------------------------------------- */ -struct umac_ctx *umac_new(u_char key[]) +struct umac_ctx *umac_new(const u_char key[]) /* Dynamically allocate a umac_ctx struct, initialize variables, * generate subkeys from key. Align to 16-byte boundary. */ @@ -1217,7 +1216,7 @@ struct umac_ctx *umac_new(u_char key[]) size_t bytes_to_add; aes_int_key prf_key; - octx = ctx = xmalloc(sizeof(*ctx) + ALLOC_BOUNDARY); + octx = ctx = xcalloc(1, sizeof(*ctx) + ALLOC_BOUNDARY); if (ctx) { if (ALLOC_BOUNDARY) { bytes_to_add = ALLOC_BOUNDARY - @@ -1225,7 +1224,7 @@ struct umac_ctx *umac_new(u_char key[]) ctx = (struct umac_ctx *)((u_char *)ctx + bytes_to_add); } ctx->free_ptr = octx; - aes_key_setup(key,prf_key); + aes_key_setup(key, prf_key); pdf_init(&ctx->pdf, prf_key); uhash_init(&ctx->hash, prf_key); } @@ -1235,18 +1234,18 @@ struct umac_ctx *umac_new(u_char key[]) /* ---------------------------------------------------------------------- */ -int umac_final(struct umac_ctx *ctx, u_char tag[], u_char nonce[8]) +int umac_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]) /* Incorporate any pending data, pad, and generate tag */ { uhash_final(&ctx->hash, (u_char *)tag); - pdf_gen_xor(&ctx->pdf, (UINT8 *)nonce, (UINT8 *)tag); + pdf_gen_xor(&ctx->pdf, (const UINT8 *)nonce, (UINT8 *)tag); return (1); } /* ---------------------------------------------------------------------- */ -int umac_update(struct umac_ctx *ctx, u_char *input, long len) +int umac_update(struct umac_ctx *ctx, const u_char *input, long len) /* Given len bytes of data, we parse it into L1_KEY_LEN chunks and */ /* hash each one, calling the PDF on the hashed output whenever the hash- */ /* output buffer is full. */ diff --git a/umac.h b/umac.h index 055c705..7fb770f 100644 --- a/umac.h +++ b/umac.h @@ -1,4 +1,4 @@ -/* $OpenBSD: umac.h,v 1.1 2007/06/07 19:37:34 pvalchev Exp $ */ +/* $OpenBSD: umac.h,v 1.3 2013/07/22 12:20:02 djm Exp $ */ /* ----------------------------------------------------------------------- * * umac.h -- C Implementation UMAC Message Authentication @@ -52,7 +52,7 @@ extern "C" { #endif -struct umac_ctx *umac_new(u_char key[]); +struct umac_ctx *umac_new(const u_char key[]); /* Dynamically allocate a umac_ctx struct, initialize variables, * generate subkeys from key. */ @@ -62,10 +62,10 @@ int umac_reset(struct umac_ctx *ctx); /* Reset a umac_ctx to begin authenicating a new message */ #endif -int umac_update(struct umac_ctx *ctx, u_char *input, long len); +int umac_update(struct umac_ctx *ctx, const u_char *input, long len); /* Incorporate len bytes pointed to by input into context ctx */ -int umac_final(struct umac_ctx *ctx, u_char tag[], u_char nonce[8]); +int umac_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]); /* Incorporate any pending data and the ctr value, and return tag. * This function returns error code if ctr < 0. */ @@ -116,6 +116,12 @@ int uhash(uhash_ctx_t ctx, #endif +/* matching umac-128 API, we reuse umac_ctx, since it's opaque */ +struct umac_ctx *umac128_new(const u_char key[]); +int umac128_update(struct umac_ctx *ctx, const u_char *input, long len); +int umac128_final(struct umac_ctx *ctx, u_char tag[], const u_char nonce[8]); +int umac128_delete(struct umac_ctx *ctx); + #ifdef __cplusplus } #endif diff --git a/uuencode.c b/uuencode.c index 09d80d2..7fc867a 100644 --- a/uuencode.c +++ b/uuencode.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uuencode.c,v 1.26 2010/08/31 11:54:45 djm Exp $ */ +/* $OpenBSD: uuencode.c,v 1.28 2015/04/24 01:36:24 deraadt Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * @@ -29,6 +29,7 @@ #include #include #include +#include #include "xmalloc.h" #include "uuencode.h" @@ -67,7 +68,7 @@ uudecode(const char *src, u_char *target, size_t targsize) /* and remove trailing whitespace because __b64_pton needs this */ *p = '\0'; len = __b64_pton(encoded, target, targsize); - xfree(encoded); + free(encoded); return len; } @@ -81,7 +82,7 @@ dump_base64(FILE *fp, const u_char *data, u_int len) fprintf(fp, "dump_base64: len > 65536\n"); return; } - buf = xmalloc(2*len); + buf = xreallocarray(NULL, 2, len); n = uuencode(data, len, buf, 2*len); for (i = 0; i < n; i++) { fprintf(fp, "%c", buf[i]); @@ -90,5 +91,5 @@ dump_base64(FILE *fp, const u_char *data, u_int len) } if (i % 70 != 69) fprintf(fp, "\n"); - xfree(buf); + free(buf); } diff --git a/verify.c b/verify.c new file mode 100644 index 0000000..1671a41 --- /dev/null +++ b/verify.c @@ -0,0 +1,49 @@ +/* $OpenBSD: verify.c,v 1.3 2013/12/09 11:03:45 markus Exp $ */ + +/* + * Public Domain, Author: Daniel J. Bernstein + * Copied from nacl-20110221/crypto_verify/32/ref/verify.c + */ + +#include "includes.h" + +#include "crypto_api.h" + +int crypto_verify_32(const unsigned char *x,const unsigned char *y) +{ + unsigned int differentbits = 0; +#define F(i) differentbits |= x[i] ^ y[i]; + F(0) + F(1) + F(2) + F(3) + F(4) + F(5) + F(6) + F(7) + F(8) + F(9) + F(10) + F(11) + F(12) + F(13) + F(14) + F(15) + F(16) + F(17) + F(18) + F(19) + F(20) + F(21) + F(22) + F(23) + F(24) + F(25) + F(26) + F(27) + F(28) + F(29) + F(30) + F(31) + return (1 & ((differentbits - 1) >> 8)) - 1; +} diff --git a/version.h b/version.h index 6a1acb3..39a3a5b 100644 --- a/version.h +++ b/version.h @@ -1,6 +1,6 @@ -/* $OpenBSD: version.h,v 1.62 2011/08/02 23:13:01 djm Exp $ */ +/* $OpenBSD: version.h,v 1.75 2015/08/21 03:45:26 djm Exp $ */ -#define SSH_VERSION "OpenSSH_5.9" +#define SSH_VERSION "OpenSSH_7.1" -#define SSH_PORTABLE "p1" +#define SSH_PORTABLE "p1 Microsoft Pragma Win32 port Sep 21 2015" #define SSH_RELEASE SSH_VERSION SSH_PORTABLE diff --git a/xmalloc.c b/xmalloc.c index 9985b4c..98cbf87 100644 --- a/xmalloc.c +++ b/xmalloc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: xmalloc.c,v 1.27 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: xmalloc.c,v 1.32 2015/04/24 01:36:01 deraadt Exp $ */ /* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , Espoo, Finland @@ -15,8 +15,10 @@ #include "includes.h" -#include #include +#ifdef HAVE_STDINT_H +#include +#endif #include #include #include @@ -33,7 +35,7 @@ xmalloc(size_t size) fatal("xmalloc: zero size"); ptr = malloc(size); if (ptr == NULL) - fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size); + fatal("xmalloc: out of memory (allocating %zu bytes)", size); return ptr; } @@ -44,43 +46,27 @@ xcalloc(size_t nmemb, size_t size) if (size == 0 || nmemb == 0) fatal("xcalloc: zero size"); - if (SIZE_T_MAX / nmemb < size) - fatal("xcalloc: nmemb * size > SIZE_T_MAX"); + if (SIZE_MAX / nmemb < size) + fatal("xcalloc: nmemb * size > SIZE_MAX"); ptr = calloc(nmemb, size); if (ptr == NULL) - fatal("xcalloc: out of memory (allocating %lu bytes)", - (u_long)(size * nmemb)); + fatal("xcalloc: out of memory (allocating %zu bytes)", + size * nmemb); return ptr; } void * -xrealloc(void *ptr, size_t nmemb, size_t size) +xreallocarray(void *ptr, size_t nmemb, size_t size) { void *new_ptr; - size_t new_size = nmemb * size; - if (new_size == 0) - fatal("xrealloc: zero size"); - if (SIZE_T_MAX / nmemb < size) - fatal("xrealloc: nmemb * size > SIZE_T_MAX"); - if (ptr == NULL) - new_ptr = malloc(new_size); - else - new_ptr = realloc(ptr, new_size); + new_ptr = reallocarray(ptr, nmemb, size); if (new_ptr == NULL) - fatal("xrealloc: out of memory (new_size %lu bytes)", - (u_long) new_size); + fatal("xreallocarray: out of memory (%zu elements of %zu bytes)", + nmemb, size); return new_ptr; } -void -xfree(void *ptr) -{ - if (ptr == NULL) - fatal("xfree: NULL pointer given as argument"); - free(ptr); -} - char * xstrdup(const char *str) { diff --git a/xmalloc.h b/xmalloc.h index fb217a4..2bec77b 100644 --- a/xmalloc.h +++ b/xmalloc.h @@ -1,4 +1,4 @@ -/* $OpenBSD: xmalloc.h,v 1.13 2006/08/03 03:34:42 deraadt Exp $ */ +/* $OpenBSD: xmalloc.h,v 1.15 2015/04/24 01:36:01 deraadt Exp $ */ /* * Author: Tatu Ylonen @@ -18,8 +18,7 @@ void *xmalloc(size_t); void *xcalloc(size_t, size_t); -void *xrealloc(void *, size_t, size_t); -void xfree(void *); +void *xreallocarray(void *, size_t, size_t); char *xstrdup(const char *); int xasprintf(char **, const char *, ...) __attribute__((__format__ (printf, 2, 3)))