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openssh-portable
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upstream: make ssh->kex->session_id a sshbuf instead of u_char*/size_t 

and use that instead of global variables containing copies of it. feedback/ok
markus@

OpenBSD-Commit-ID: a4b1b1ca4afd2e37cb9f64f737b30a6a7f96af68
This commit is contained in:
djm@openbsd.org 2021-01-27 10:05:28 +00:00 committed by Damien Miller
parent 4ca6a1fac3
commit 39be3dc209
15 changed files with 80 additions and 103 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
auth2-gss.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2-gss.c,v 1.30 2020/10/18 11:32:01 djm Exp $ */ /* $OpenBSD: auth2-gss.c,v 1.31 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
@ -299,7 +299,7 @@ input_gssapi_mic(int type, u_int32_t plen, struct ssh *ssh)
mic.value = p; mic.value = p;
mic.length = len; mic.length = len;
ssh_gssapi_buildmic(b, authctxt->user, authctxt->service, ssh_gssapi_buildmic(b, authctxt->user, authctxt->service,
"gssapi-with-mic"); "gssapi-with-mic", ssh->kex->session_id);
if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL) if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL)
fatal_f("sshbuf_mutable_ptr failed"); fatal_f("sshbuf_mutable_ptr failed");

7
auth2-hostbased.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2-hostbased.c,v 1.45 2021/01/26 05:32:21 dtucker Exp $ */ /* $OpenBSD: auth2-hostbased.c,v 1.46 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2000 Markus Friedl. All rights reserved.
* *
@ -35,6 +35,7 @@
#include "xmalloc.h" #include "xmalloc.h"
#include "ssh2.h" #include "ssh2.h"
#include "packet.h" #include "packet.h"
#include "kex.h"
#include "sshbuf.h" #include "sshbuf.h"
#include "log.h" #include "log.h"
#include "misc.h" #include "misc.h"
@ -54,8 +55,6 @@
/* import */ /* import */
extern ServerOptions options; extern ServerOptions options;
extern u_char *session_id2;
extern u_int session_id2_len;
static int static int
userauth_hostbased(struct ssh *ssh) userauth_hostbased(struct ssh *ssh)
@ -129,7 +128,7 @@ userauth_hostbased(struct ssh *ssh)
if ((b = sshbuf_new()) == NULL) if ((b = sshbuf_new()) == NULL)
fatal_f("sshbuf_new failed"); fatal_f("sshbuf_new failed");
/* reconstruct packet */ /* reconstruct packet */
if ((r = sshbuf_put_string(b, session_id2, session_id2_len)) != 0 || if ((r = sshbuf_put_stringb(b, ssh->kex->session_id)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 || (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
(r = sshbuf_put_cstring(b, authctxt->user)) != 0 || (r = sshbuf_put_cstring(b, authctxt->user)) != 0 ||
(r = sshbuf_put_cstring(b, authctxt->service)) != 0 || (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||

11
auth2-pubkey.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2-pubkey.c,v 1.105 2021/01/26 00:49:30 djm Exp $ */ /* $OpenBSD: auth2-pubkey.c,v 1.106 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2000 Markus Friedl. All rights reserved.
* *
@ -47,6 +47,7 @@
#include "ssh.h" #include "ssh.h"
#include "ssh2.h" #include "ssh2.h"
#include "packet.h" #include "packet.h"
#include "kex.h"
#include "sshbuf.h" #include "sshbuf.h"
#include "log.h" #include "log.h"
#include "misc.h" #include "misc.h"
@ -72,8 +73,6 @@
/* import */ /* import */
extern ServerOptions options; extern ServerOptions options;
extern u_char *session_id2;
extern u_int session_id2_len;
static char * static char *
format_key(const struct sshkey *key) format_key(const struct sshkey *key)
@ -175,11 +174,11 @@ userauth_pubkey(struct ssh *ssh)
if ((b = sshbuf_new()) == NULL) if ((b = sshbuf_new()) == NULL)
fatal_f("sshbuf_new failed"); fatal_f("sshbuf_new failed");
if (ssh->compat & SSH_OLD_SESSIONID) { if (ssh->compat & SSH_OLD_SESSIONID) {
if ((r = sshbuf_put(b, session_id2, session_id2_len)) != 0) if ((r = sshbuf_putb(b, ssh->kex->session_id)) != 0)
fatal_fr(r, "put old session id"); fatal_fr(r, "put old session id");
} else { } else {
if ((r = sshbuf_put_string(b, session_id2, if ((r = sshbuf_put_stringb(b,
session_id2_len)) != 0) ssh->kex->session_id)) != 0)
fatal_fr(r, "put session id"); fatal_fr(r, "put session id");
} }
if (!authctxt->valid || authctxt->user == NULL) { if (!authctxt->valid || authctxt->user == NULL) {

4
auth2.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2.c,v 1.159 2020/10/18 11:32:01 djm Exp $ */ /* $OpenBSD: auth2.c,v 1.160 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2000 Markus Friedl. All rights reserved.
* *
@ -61,8 +61,6 @@
/* import */ /* import */
extern ServerOptions options; extern ServerOptions options;
extern u_char *session_id2;
extern u_int session_id2_len;
extern struct sshbuf *loginmsg; extern struct sshbuf *loginmsg;
/* methods */ /* methods */

9
clientloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: clientloop.c,v 1.357 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: clientloop.c,v 1.358 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Author: Tatu Ylonen <ylo@cs.hut.fi> * Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -2125,9 +2125,6 @@ client_global_hostkeys_private_confirm(struct ssh *ssh, int type,
if ((signdata = sshbuf_new()) == NULL) if ((signdata = sshbuf_new()) == NULL)
fatal_f("sshbuf_new failed"); fatal_f("sshbuf_new failed");
/* Don't want to accidentally accept an unbound signature */
if (ssh->kex->session_id_len == 0)
fatal_f("ssh->kex->session_id_len == 0");
/* /*
* Expect a signature for each of the ctx->nnew private keys we * 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 * haven't seen before. They will be in the same order as the
@ -2140,8 +2137,8 @@ client_global_hostkeys_private_confirm(struct ssh *ssh, int type,
sshbuf_reset(signdata); sshbuf_reset(signdata);
if ( (r = sshbuf_put_cstring(signdata, if ( (r = sshbuf_put_cstring(signdata,
"hostkeys-prove-00@openssh.com")) != 0 || "hostkeys-prove-00@openssh.com")) != 0 ||
(r = sshbuf_put_string(signdata, ssh->kex->session_id, (r = sshbuf_put_stringb(signdata,
ssh->kex->session_id_len)) != 0 || ssh->kex->session_id)) != 0 ||
(r = sshkey_puts(ctx->keys[i], signdata)) != 0) (r = sshkey_puts(ctx->keys[i], signdata)) != 0)
fatal_fr(r, "compose signdata"); fatal_fr(r, "compose signdata");
/* Extract and verify signature */ /* Extract and verify signature */

9
gss-genr.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: gss-genr.c,v 1.27 2020/10/18 11:32:01 djm Exp $ */ /* $OpenBSD: gss-genr.c,v 1.28 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved. * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
@ -44,9 +44,6 @@
#include "ssh-gss.h" #include "ssh-gss.h"
extern u_char *session_id2;
extern u_int session_id2_len;
/* sshbuf_get for gss_buffer_desc */ /* sshbuf_get for gss_buffer_desc */
int int
ssh_gssapi_get_buffer_desc(struct sshbuf *b, gss_buffer_desc *g) ssh_gssapi_get_buffer_desc(struct sshbuf *b, gss_buffer_desc *g)
@ -259,12 +256,12 @@ ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_t buffer, gss_buffer_t hash)
void void
ssh_gssapi_buildmic(struct sshbuf *b, const char *user, const char *service, ssh_gssapi_buildmic(struct sshbuf *b, const char *user, const char *service,
const char *context) const char *context, const struct sshbuf *session_id)
{ {
int r; int r;
sshbuf_reset(b); sshbuf_reset(b);
if ((r = sshbuf_put_string(b, session_id2, session_id2_len)) != 0 || if ((r = sshbuf_put_stringb(b, session_id)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 || (r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
(r = sshbuf_put_cstring(b, user)) != 0 || (r = sshbuf_put_cstring(b, user)) != 0 ||
(r = sshbuf_put_cstring(b, service)) != 0 || (r = sshbuf_put_cstring(b, service)) != 0 ||

22
kex.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: kex.c,v 1.164 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: kex.c,v 1.165 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
* *
@ -637,7 +637,8 @@ kex_new(void)
(kex->peer = sshbuf_new()) == NULL || (kex->peer = sshbuf_new()) == NULL ||
(kex->my = sshbuf_new()) == NULL || (kex->my = sshbuf_new()) == NULL ||
(kex->client_version = sshbuf_new()) == NULL || (kex->client_version = sshbuf_new()) == NULL ||
(kex->server_version = sshbuf_new()) == NULL) { (kex->server_version = sshbuf_new()) == NULL ||
(kex->session_id = sshbuf_new()) == NULL) {
kex_free(kex); kex_free(kex);
return NULL; return NULL;
} }
@ -697,7 +698,7 @@ kex_free(struct kex *kex)
sshbuf_free(kex->client_version); sshbuf_free(kex->client_version);
sshbuf_free(kex->server_version); sshbuf_free(kex->server_version);
sshbuf_free(kex->client_pub); sshbuf_free(kex->client_pub);
free(kex->session_id); sshbuf_free(kex->session_id);
free(kex->failed_choice); free(kex->failed_choice);
free(kex->hostkey_alg); free(kex->hostkey_alg);
free(kex->name); free(kex->name);
@ -1015,8 +1016,7 @@ derive_key(struct ssh *ssh, int id, u_int need, u_char *hash, u_int hashlen,
ssh_digest_update_buffer(hashctx, shared_secret) != 0 || ssh_digest_update_buffer(hashctx, shared_secret) != 0 ||
ssh_digest_update(hashctx, hash, hashlen) != 0 || ssh_digest_update(hashctx, hash, hashlen) != 0 ||
ssh_digest_update(hashctx, &c, 1) != 0 || ssh_digest_update(hashctx, &c, 1) != 0 ||
ssh_digest_update(hashctx, kex->session_id, ssh_digest_update_buffer(hashctx, kex->session_id) != 0 ||
kex->session_id_len) != 0 ||
ssh_digest_final(hashctx, digest, mdsz) != 0) { ssh_digest_final(hashctx, digest, mdsz) != 0) {
r = SSH_ERR_LIBCRYPTO_ERROR; r = SSH_ERR_LIBCRYPTO_ERROR;
error_f("KEX hash failed"); error_f("KEX hash failed");
@ -1067,12 +1067,14 @@ kex_derive_keys(struct ssh *ssh, u_char *hash, u_int hashlen,
int r; int r;
/* save initial hash as session id */ /* save initial hash as session id */
if (kex->session_id == NULL) { if ((kex->flags & KEX_INITIAL) != 0) {
kex->session_id_len = hashlen; if ((kex->session_id = sshbuf_new()) == NULL)
kex->session_id = malloc(kex->session_id_len);
if (kex->session_id == NULL)
return SSH_ERR_ALLOC_FAIL; return SSH_ERR_ALLOC_FAIL;
memcpy(kex->session_id, hash, kex->session_id_len); if ((r = sshbuf_put(kex->session_id, hash, hashlen)) != 0)
return r;
} else if (sshbuf_len(kex->session_id) == 0) {
error_f("no session ID in rekex");
return SSH_ERR_INTERNAL_ERROR;
} }
for (i = 0; i < NKEYS; i++) { for (i = 0; i < NKEYS; i++) {
if ((r = derive_key(ssh, 'A'+i, kex->we_need, hash, hashlen, if ((r = derive_key(ssh, 'A'+i, kex->we_need, hash, hashlen,

5
kex.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: kex.h,v 1.112 2020/12/29 00:59:15 djm Exp $ */ /* $OpenBSD: kex.h,v 1.113 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -132,8 +132,6 @@ struct newkeys {
struct ssh; struct ssh;
struct kex { struct kex {
u_char *session_id;
size_t session_id_len;
struct newkeys *newkeys[MODE_MAX]; struct newkeys *newkeys[MODE_MAX];
u_int we_need; u_int we_need;
u_int dh_need; u_int dh_need;
@ -149,6 +147,7 @@ struct kex {
struct sshbuf *peer; struct sshbuf *peer;
struct sshbuf *client_version; struct sshbuf *client_version;
struct sshbuf *server_version; struct sshbuf *server_version;
struct sshbuf *session_id;
sig_atomic_t done; sig_atomic_t done;
u_int flags; u_int flags;
int hash_alg; int hash_alg;

49
monitor.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: monitor.c,v 1.222 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: monitor.c,v 1.223 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright 2002 Niels Provos <provos@citi.umich.edu> * Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org> * Copyright 2002 Markus Friedl <markus@openbsd.org>
@ -104,7 +104,6 @@ static Gssctxt *gsscontext = NULL;
/* Imports */ /* Imports */
extern ServerOptions options; extern ServerOptions options;
extern u_int utmp_len; extern u_int utmp_len;
extern u_char session_id[];
extern struct sshbuf *loginmsg; extern struct sshbuf *loginmsg;
extern struct sshauthopt *auth_opts; /* XXX move to permanent ssh->authctxt? */ extern struct sshauthopt *auth_opts; /* XXX move to permanent ssh->authctxt? */
@ -1431,7 +1430,9 @@ mm_answer_keyverify(struct ssh *ssh, int sock, struct sshbuf *m)
break; break;
} }
if (!valid_data) if (!valid_data)
fatal_f("bad signature data blob"); fatal_f("bad %s signature data blob",
key_blobtype == MM_USERKEY ? "userkey" :
(key_blobtype == MM_HOSTKEY ? "hostkey" : "unknown"));
if ((fp = sshkey_fingerprint(key, options.fingerprint_hash, if ((fp = sshkey_fingerprint(key, options.fingerprint_hash,
SSH_FP_DEFAULT)) == NULL) SSH_FP_DEFAULT)) == NULL)
@ -1716,28 +1717,34 @@ monitor_apply_keystate(struct ssh *ssh, struct monitor *pmonitor)
fatal_fr(r, "packet_set_state"); fatal_fr(r, "packet_set_state");
sshbuf_free(child_state); sshbuf_free(child_state);
child_state = NULL; child_state = NULL;
if ((kex = ssh->kex) == NULL)
if ((kex = ssh->kex) != NULL) { fatal_f("internal error: ssh->kex == NULL");
/* XXX set callbacks */ if (session_id2_len != sshbuf_len(ssh->kex->session_id)) {
fatal_f("incorrect session id length %zu (expected %u)",
sshbuf_len(ssh->kex->session_id), session_id2_len);
}
if (memcmp(sshbuf_ptr(ssh->kex->session_id), session_id2,
session_id2_len) != 0)
fatal_f("session ID mismatch");
/* XXX set callbacks */
#ifdef WITH_OPENSSL #ifdef WITH_OPENSSL
kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server; kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server;
kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server; kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server;
kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_server; kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_server;
kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_server; kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_server;
kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_server; kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_server;
kex->kex[KEX_DH_GEX_SHA1] = kexgex_server; kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
kex->kex[KEX_DH_GEX_SHA256] = kexgex_server; kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
# ifdef OPENSSL_HAS_ECC # ifdef OPENSSL_HAS_ECC
kex->kex[KEX_ECDH_SHA2] = kex_gen_server; kex->kex[KEX_ECDH_SHA2] = kex_gen_server;
# endif # endif
#endif /* WITH_OPENSSL */ #endif /* WITH_OPENSSL */
kex->kex[KEX_C25519_SHA256] = kex_gen_server; kex->kex[KEX_C25519_SHA256] = kex_gen_server;
kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server; kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server;
kex->load_host_public_key=&get_hostkey_public_by_type; kex->load_host_public_key=&get_hostkey_public_by_type;
kex->load_host_private_key=&get_hostkey_private_by_type; kex->load_host_private_key=&get_hostkey_private_by_type;
kex->host_key_index=&get_hostkey_index; kex->host_key_index=&get_hostkey_index;
kex->sign = sshd_hostkey_sign; kex->sign = sshd_hostkey_sign;
}
} }
/* This function requires careful sanity checking */ /* This function requires careful sanity checking */

11
packet.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: packet.c,v 1.298 2020/11/27 00:49:58 djm Exp $ */ /* $OpenBSD: packet.c,v 1.299 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Author: Tatu Ylonen <ylo@cs.hut.fi> * Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -2196,9 +2196,7 @@ kex_to_blob(struct sshbuf *m, struct kex *kex)
{ {
int r; int r;
if ((r = sshbuf_put_string(m, kex->session_id, if ((r = sshbuf_put_u32(m, kex->we_need)) != 0 ||
kex->session_id_len)) != 0 ||
(r = sshbuf_put_u32(m, kex->we_need)) != 0 ||
(r = sshbuf_put_cstring(m, kex->hostkey_alg)) != 0 || (r = sshbuf_put_cstring(m, kex->hostkey_alg)) != 0 ||
(r = sshbuf_put_u32(m, kex->hostkey_type)) != 0 || (r = sshbuf_put_u32(m, kex->hostkey_type)) != 0 ||
(r = sshbuf_put_u32(m, kex->hostkey_nid)) != 0 || (r = sshbuf_put_u32(m, kex->hostkey_nid)) != 0 ||
@ -2207,6 +2205,7 @@ kex_to_blob(struct sshbuf *m, struct kex *kex)
(r = sshbuf_put_stringb(m, kex->peer)) != 0 || (r = sshbuf_put_stringb(m, kex->peer)) != 0 ||
(r = sshbuf_put_stringb(m, kex->client_version)) != 0 || (r = sshbuf_put_stringb(m, kex->client_version)) != 0 ||
(r = sshbuf_put_stringb(m, kex->server_version)) != 0 || (r = sshbuf_put_stringb(m, kex->server_version)) != 0 ||
(r = sshbuf_put_stringb(m, kex->session_id)) != 0 ||
(r = sshbuf_put_u32(m, kex->flags)) != 0) (r = sshbuf_put_u32(m, kex->flags)) != 0)
return r; return r;
return 0; return 0;
@ -2359,8 +2358,7 @@ kex_from_blob(struct sshbuf *m, struct kex **kexp)
if ((kex = kex_new()) == NULL) if ((kex = kex_new()) == NULL)
return SSH_ERR_ALLOC_FAIL; return SSH_ERR_ALLOC_FAIL;
if ((r = sshbuf_get_string(m, &kex->session_id, &kex->session_id_len)) != 0 || if ((r = sshbuf_get_u32(m, &kex->we_need)) != 0 ||
(r = sshbuf_get_u32(m, &kex->we_need)) != 0 ||
(r = sshbuf_get_cstring(m, &kex->hostkey_alg, NULL)) != 0 || (r = sshbuf_get_cstring(m, &kex->hostkey_alg, NULL)) != 0 ||
(r = sshbuf_get_u32(m, (u_int *)&kex->hostkey_type)) != 0 || (r = sshbuf_get_u32(m, (u_int *)&kex->hostkey_type)) != 0 ||
(r = sshbuf_get_u32(m, (u_int *)&kex->hostkey_nid)) != 0 || (r = sshbuf_get_u32(m, (u_int *)&kex->hostkey_nid)) != 0 ||
@ -2369,6 +2367,7 @@ kex_from_blob(struct sshbuf *m, struct kex **kexp)
(r = sshbuf_get_stringb(m, kex->peer)) != 0 || (r = sshbuf_get_stringb(m, kex->peer)) != 0 ||
(r = sshbuf_get_stringb(m, kex->client_version)) != 0 || (r = sshbuf_get_stringb(m, kex->client_version)) != 0 ||
(r = sshbuf_get_stringb(m, kex->server_version)) != 0 || (r = sshbuf_get_stringb(m, kex->server_version)) != 0 ||
(r = sshbuf_get_stringb(m, kex->session_id)) != 0 ||
(r = sshbuf_get_u32(m, &kex->flags)) != 0) (r = sshbuf_get_u32(m, &kex->flags)) != 0)
goto out; goto out;
kex->server = 1; kex->server = 1;

6
serverloop.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: serverloop.c,v 1.224 2020/10/18 11:32:02 djm Exp $ */ /* $OpenBSD: serverloop.c,v 1.225 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Author: Tatu Ylonen <ylo@cs.hut.fi> * Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -779,8 +779,8 @@ server_input_hostkeys_prove(struct ssh *ssh, struct sshbuf **respp)
sshkey_type_plain(key->type) == KEY_RSA; sshkey_type_plain(key->type) == KEY_RSA;
if ((r = sshbuf_put_cstring(sigbuf, if ((r = sshbuf_put_cstring(sigbuf,
"hostkeys-prove-00@openssh.com")) != 0 || "hostkeys-prove-00@openssh.com")) != 0 ||
(r = sshbuf_put_string(sigbuf, (r = sshbuf_put_stringb(sigbuf,
ssh->kex->session_id, ssh->kex->session_id_len)) != 0 || ssh->kex->session_id)) != 0 ||
(r = sshkey_puts(key, sigbuf)) != 0 || (r = sshkey_puts(key, sigbuf)) != 0 ||
(r = ssh->kex->sign(ssh, key_prv, key_pub, &sig, &slen, (r = ssh->kex->sign(ssh, key_prv, key_pub, &sig, &slen,
sshbuf_ptr(sigbuf), sshbuf_len(sigbuf), sshbuf_ptr(sigbuf), sshbuf_len(sigbuf),

4
ssh-gss.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-gss.h,v 1.14 2018/07/10 09:13:30 djm Exp $ */ /* $OpenBSD: ssh-gss.h,v 1.15 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
* *
@ -122,7 +122,7 @@ void ssh_gssapi_build_ctx(Gssctxt **);
void ssh_gssapi_delete_ctx(Gssctxt **); void ssh_gssapi_delete_ctx(Gssctxt **);
OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
void ssh_gssapi_buildmic(struct sshbuf *, const char *, void ssh_gssapi_buildmic(struct sshbuf *, const char *,
const char *, const char *); const char *, const char *, const struct sshbuf *);
int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *);
/* In the server */ /* In the server */

6
ssh_api.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh_api.c,v 1.25 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: ssh_api.c,v 1.26 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2012 Markus Friedl. All rights reserved. * Copyright (c) 2012 Markus Friedl. All rights reserved.
* *
@ -60,10 +60,6 @@ int mm_sshkey_sign(struct sshkey *, u_char **, u_int *,
DH *mm_choose_dh(int, int, int); DH *mm_choose_dh(int, int, int);
#endif #endif
/* 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 int
mm_sshkey_sign(struct sshkey *key, u_char **sigp, u_int *lenp, mm_sshkey_sign(struct sshkey *key, u_char **sigp, u_int *lenp,
const u_char *data, u_int datalen, const char *alg, const u_char *data, u_int datalen, const char *alg,

24
sshconnect2.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect2.c,v 1.345 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: sshconnect2.c,v 1.346 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2000 Markus Friedl. All rights reserved.
* Copyright (c) 2008 Damien Miller. All rights reserved. * Copyright (c) 2008 Damien Miller. All rights reserved.
@ -89,9 +89,6 @@ extern Options options;
* SSH2 key exchange * SSH2 key exchange
*/ */
u_char *session_id2 = NULL;
u_int session_id2_len = 0;
static char *xxx_host; static char *xxx_host;
static struct sockaddr *xxx_hostaddr; static struct sockaddr *xxx_hostaddr;
static const struct ssh_conn_info *xxx_conn_info; static const struct ssh_conn_info *xxx_conn_info;
@ -298,9 +295,6 @@ ssh_kex2(struct ssh *ssh, char *host, struct sockaddr *hostaddr, u_short port,
if ((r = kex_prop2buf(ssh->kex->my, myproposal)) != 0) if ((r = kex_prop2buf(ssh->kex->my, myproposal)) != 0)
fatal_r(r, "kex_prop2buf"); fatal_r(r, "kex_prop2buf");
session_id2 = ssh->kex->session_id;
session_id2_len = ssh->kex->session_id_len;
#ifdef DEBUG_KEXDH #ifdef DEBUG_KEXDH
/* send 1st encrypted/maced/compressed message */ /* send 1st encrypted/maced/compressed message */
if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 || if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
@ -878,7 +872,8 @@ process_gssapi_token(struct ssh *ssh, gss_buffer_t recv_tok)
if ((b = sshbuf_new()) == NULL) if ((b = sshbuf_new()) == NULL)
fatal_f("sshbuf_new failed"); fatal_f("sshbuf_new failed");
ssh_gssapi_buildmic(b, authctxt->server_user, ssh_gssapi_buildmic(b, authctxt->server_user,
authctxt->service, "gssapi-with-mic"); authctxt->service, "gssapi-with-mic",
ssh->kex->session_id);
if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL) if ((gssbuf.value = sshbuf_mutable_ptr(b)) == NULL)
fatal_f("sshbuf_mutable_ptr failed"); fatal_f("sshbuf_mutable_ptr failed");
@ -1409,13 +1404,12 @@ sign_and_send_pubkey(struct ssh *ssh, Identity *id)
if ((b = sshbuf_new()) == NULL) if ((b = sshbuf_new()) == NULL)
fatal_f("sshbuf_new failed"); fatal_f("sshbuf_new failed");
if (ssh->compat & SSH_OLD_SESSIONID) { if (ssh->compat & SSH_OLD_SESSIONID) {
if ((r = sshbuf_put(b, session_id2, if ((r = sshbuf_putb(b, ssh->kex->session_id)) != 0)
session_id2_len)) != 0) fatal_fr(r, "sshbuf_putb");
fatal_fr(r, "sshbuf_put");
} else { } else {
if ((r = sshbuf_put_string(b, session_id2, if ((r = sshbuf_put_stringb(b,
session_id2_len)) != 0) ssh->kex->session_id)) != 0)
fatal_fr(r, "sshbuf_put_string"); fatal_fr(r, "sshbuf_put_stringb");
} }
skip = sshbuf_len(b); skip = sshbuf_len(b);
if ((r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 || if ((r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 0 ||
@ -2172,7 +2166,7 @@ userauth_hostbased(struct ssh *ssh)
error_fr(r, "sshkey_to_blob"); error_fr(r, "sshkey_to_blob");
goto out; goto out;
} }
if ((r = sshbuf_put_string(b, session_id2, session_id2_len)) != 0 || if ((r = sshbuf_put_stringb(b, ssh->kex->session_id)) != 0 ||
(r = sshbuf_put_u8(b, SSH2_MSG_USERAUTH_REQUEST)) != 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, authctxt->server_user)) != 0 ||
(r = sshbuf_put_cstring(b, authctxt->service)) != 0 || (r = sshbuf_put_cstring(b, authctxt->service)) != 0 ||

12
sshd.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshd.c,v 1.568 2021/01/27 09:26:54 djm Exp $ */ /* $OpenBSD: sshd.c,v 1.569 2021/01/27 10:05:28 djm Exp $ */
/* /*
* Author: Tatu Ylonen <ylo@cs.hut.fi> * Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -205,13 +205,6 @@ struct {
static volatile sig_atomic_t received_sighup = 0; static volatile sig_atomic_t received_sighup = 0;
static volatile sig_atomic_t received_sigterm = 0; static volatile sig_atomic_t received_sigterm = 0;
/* session identifier, used by RSA-auth */
u_char session_id[16];
/* same for ssh2 */
u_char *session_id2 = NULL;
u_int session_id2_len = 0;
/* record remote hostname or ip */ /* record remote hostname or ip */
u_int utmp_len = HOST_NAME_MAX+1; u_int utmp_len = HOST_NAME_MAX+1;
@ -2398,9 +2391,6 @@ do_ssh2_kex(struct ssh *ssh)
ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &kex->done); ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &kex->done);
session_id2 = kex->session_id;
session_id2_len = kex->session_id_len;
#ifdef DEBUG_KEXDH #ifdef DEBUG_KEXDH
/* send 1st encrypted/maced/compressed message */ /* send 1st encrypted/maced/compressed message */
if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 || if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||