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- djm@cvs.openbsd.org 2014/06/24 01:13:21 

[Makefile.in auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c
     [auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c
     [cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h
     [digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h
     [hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h
     [ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c
     [ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c
     [ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c
     [sshconnect2.c sshd.c sshkey.c sshkey.h
     [openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h]
     New key API: refactor key-related functions to be more library-like,
     existing API is offered as a set of wrappers.

     with and ok markus@

     Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew
     Dempsky and Ron Bowes for a detailed review a few months ago.

     NB. This commit also removes portable OpenSSH support for OpenSSL
     <0.9.8e.
This commit is contained in:
Damien Miller 2014-07-02 15:28:02 +10:00
parent 2cd7929250
commit 8668706d0f
49 changed files with 5942 additions and 5003 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
ChangeLog
View File

@ -24,6 +24,26 @@
Readers of a broken KRL caused by this bug will fail closed, so no
should-have-been-revoked key will be accepted.
- djm@cvs.openbsd.org 2014/06/24 01:13:21
[Makefile.in auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c
[auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c
[cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h
[digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h
[hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h
[ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c
[ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c
[ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c
[sshconnect2.c sshd.c sshkey.c sshkey.h
[openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h]
New key API: refactor key-related functions to be more library-like,
existing API is offered as a set of wrappers.
with and ok markus@
Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew
Dempsky and Ron Bowes for a detailed review a few months ago.
NB. This commit also removes portable OpenSSH support for OpenSSL
<0.9.8e.
20140618
- (tim) [openssh/session.c] Work around to get chroot sftp working on UnixWare

5
Makefile.in
View File

@ -1,4 +1,4 @@
# $Id: Makefile.in,v 1.359 2014/05/21 22:23:59 djm Exp $
# $Id: Makefile.in,v 1.360 2014/07/02 05:28:03 djm Exp $
# uncomment if you run a non bourne compatable shell. Ie. csh
#SHELL = @SH@
@ -68,7 +68,8 @@ LIBOPENSSH_OBJS=\
sshbuf.o \
sshbuf-getput-basic.o \
sshbuf-misc.o \
sshbuf-getput-crypto.o
sshbuf-getput-crypto.o \
sshkey.o
LIBSSH_OBJS=${LIBOPENSSH_OBJS} \
authfd.o authfile.o bufaux.o bufbn.o buffer.o \

4
auth-bsdauth.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-bsdauth.c,v 1.12 2014/03/12 04:50:32 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.
*
@ -26,6 +26,8 @@
#include "includes.h"
#include <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdarg.h>

5
auth-chall.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-chall.c,v 1.13 2013/05/17 00:13:13 djm Exp $ */
/* $OpenBSD: auth-chall.c,v 1.14 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2001 Markus Friedl. All rights reserved.
*
@ -26,6 +26,9 @@
#include "includes.h"
#include <sys/types.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>

14
auth-options.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-options.c,v 1.62 2013/12/19 00:27:57 djm Exp $ */
/* $OpenBSD: auth-options.c,v 1.63 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -586,8 +586,8 @@ auth_cert_options(Key *k, struct passwd *pw)
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,
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,
@ -599,14 +599,14 @@ auth_cert_options(Key *k, struct passwd *pw)
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,
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,
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,

5
auth-rsa.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth-rsa.c,v 1.86 2014/01/27 19:18:54 markus Exp $ */
/* $OpenBSD: auth-rsa.c,v 1.87 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -144,7 +144,8 @@ 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);

5
auth2-none.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2-none.c,v 1.16 2010/06/25 08:46:17 djm Exp $ */
/* $OpenBSD: auth2-none.c,v 1.17 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
@ -30,9 +30,10 @@
#include <sys/uio.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdio.h>
#include "atomicio.h"
#include "xmalloc.h"

6
auth2-pubkey.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: auth2-pubkey.c,v 1.39 2013/12/30 23:52:27 djm Exp $ */
/* $OpenBSD: auth2-pubkey.c,v 1.40 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
@ -230,7 +230,7 @@ pubkey_auth_info(Authctxt *authctxt, const Key *key, const char *fmt, ...)
}
static int
match_principals_option(const char *principal_list, struct KeyCert *cert)
match_principals_option(const char *principal_list, struct sshkey_cert *cert)
{
char *result;
u_int i;
@ -250,7 +250,7 @@ match_principals_option(const char *principal_list, struct KeyCert *cert)
}
static int
match_principals_file(char *file, struct passwd *pw, struct KeyCert *cert)
match_principals_file(char *file, struct passwd *pw, struct sshkey_cert *cert)
{
FILE *f;
char line[SSH_MAX_PUBKEY_BYTES], *cp, *ep, *line_opts;

1389
authfile.c
View File

File diff suppressed because it is too large Load Diff

63
authfile.h
View File

@ -1,32 +1,51 @@
/* $OpenBSD: authfile.h,v 1.17 2013/12/06 13:34:54 markus Exp $ */
/* $OpenBSD: authfile.h,v 1.18 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, 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, const char *, int);
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);
#ifdef WITH_LEAKMALLOC
#include "leakmalloc.h"
#endif
struct sshbuf;
struct sshkey;
int sshkey_save_private(struct sshkey *, const char *,
const char *, const char *, int, const char *, int);
int sshkey_load_file(int, const char *, 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_pem(int, int, const char *, struct sshkey **, char **);
int sshkey_perm_ok(int, const char *);
int sshkey_in_file(struct sshkey *, const char *, int);
#endif

55
cipher-3des1.c
View File

@ -29,13 +29,11 @@
#include <openssl/evp.h>
#include <stdarg.h>
#include <string.h>
#include "xmalloc.h"
#include "log.h"
#include "openbsd-compat/openssl-compat.h"
#include "ssherr.h"
/*
* This is used by SSH1:
@ -57,7 +55,7 @@ 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 +65,12 @@ 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 = xcalloc(1, 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 +84,29 @@ 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) {
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
@ -138,29 +122,28 @@ ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx)
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 *
@ -176,8 +159,6 @@ 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;
}

25
cipher-chachapoly.c
View File

@ -14,7 +14,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $OpenBSD: cipher-chachapoly.c,v 1.4 2014/01/31 16:39:19 tedu Exp $ */
/* $OpenBSD: cipher-chachapoly.c,v 1.5 2014/06/24 01:13:21 djm Exp $ */
#include "includes.h"
@ -24,16 +24,18 @@
#include <stdio.h> /* needed for misc.h */
#include "log.h"
#include "misc.h"
#include "sshbuf.h"
#include "ssherr.h"
#include "cipher-chachapoly.h"
void chachapoly_init(struct chachapoly_ctx *ctx,
int chachapoly_init(struct chachapoly_ctx *ctx,
const u_char *key, u_int keylen)
{
if (keylen != (32 + 32)) /* 2 x 256 bit keys */
fatal("%s: invalid keylen %u", __func__, keylen);
return SSH_ERR_INVALID_ARGUMENT;
chacha_keysetup(&ctx->main_ctx, key, 256);
chacha_keysetup(&ctx->header_ctx, key + 32, 256);
return 0;
}
/*
@ -52,14 +54,14 @@ chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest,
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 = -1;
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));
put_u64(seqbuf, seqnr);
POKE_U64(seqbuf, seqnr);
chacha_ivsetup(&ctx->main_ctx, seqbuf, NULL);
chacha_encrypt_bytes(&ctx->main_ctx,
poly_key, poly_key, sizeof(poly_key));
@ -71,9 +73,11 @@ chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest,
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)
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);
@ -88,7 +92,6 @@ chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest,
poly_key);
}
r = 0;
out:
explicit_bzero(expected_tag, sizeof(expected_tag));
explicit_bzero(seqbuf, sizeof(seqbuf));
@ -104,11 +107,11 @@ chachapoly_get_length(struct chachapoly_ctx *ctx,
u_char buf[4], seqbuf[8];
if (len < 4)
return -1; /* Insufficient length */
put_u64(seqbuf, seqnr);
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 = get_u32(buf);
*plenp = PEEK_U32(buf);
return 0;
}

4
cipher-chachapoly.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: cipher-chachapoly.h,v 1.3 2014/05/02 03:27:54 djm Exp $ */
/* $OpenBSD: cipher-chachapoly.h,v 1.4 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) Damien Miller 2013 <djm@mindrot.org>
@ -28,7 +28,7 @@ struct chachapoly_ctx {
struct chacha_ctx main_ctx, header_ctx;
};
void chachapoly_init(struct chachapoly_ctx *cpctx,
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,

407
cipher.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: cipher.c,v 1.98 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: cipher.c,v 1.99 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -43,23 +43,19 @@
#include <stdarg.h>
#include <stdio.h>
#include "xmalloc.h"
#include "log.h"
#include "misc.h"
#include "cipher.h"
#include "buffer.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 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;
@ -79,12 +75,12 @@ struct Cipher {
#endif
};
static const struct Cipher ciphers[] = {
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
#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 },
@ -103,12 +99,12 @@ static const struct Cipher ciphers[] = {
{ "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
# 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
# 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 },
@ -117,18 +113,19 @@ static const struct Cipher ciphers[] = {
#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 list of supported ciphers separated by the specified char. */
/* Returns a comma-separated list of supported ciphers. */
char *
cipher_alg_list(char sep, int auth_only)
{
char *ret = NULL;
char *tmp, *ret = NULL;
size_t nlen, rlen = 0;
const Cipher *c;
const struct sshcipher *c;
for (c = ciphers; c->name != NULL; c++) {
if (c->number != SSH_CIPHER_SSH2)
@ -138,7 +135,11 @@ cipher_alg_list(char sep, int auth_only)
if (ret != NULL)
ret[rlen++] = sep;
nlen = strlen(c->name);
ret = xrealloc(ret, 1, rlen + nlen + 2);
if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) {
free(ret);
return NULL;
}
ret = tmp;
memcpy(ret + rlen, c->name, nlen + 1);
rlen += nlen;
}
@ -146,19 +147,19 @@ cipher_alg_list(char sep, int auth_only)
}
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_seclen(const Cipher *c)
cipher_seclen(const struct sshcipher *c)
{
if (strcmp("3des-cbc", c->name) == 0)
return 14;
@ -166,13 +167,13 @@ cipher_seclen(const Cipher *c)
}
u_int
cipher_authlen(const Cipher *c)
cipher_authlen(const struct sshcipher *c)
{
return (c->auth_len);
}
u_int
cipher_ivlen(const Cipher *c)
cipher_ivlen(const struct sshcipher *c)
{
/*
* Default is cipher block size, except for chacha20+poly1305 that
@ -183,13 +184,13 @@ cipher_ivlen(const Cipher *c)
}
u_int
cipher_get_number(const Cipher *c)
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->flags & CFLAG_CBC) != 0;
}
@ -206,20 +207,20 @@ cipher_mask_ssh1(int client)
return mask;
}
const Cipher *
const struct sshcipher *
cipher_by_name(const char *name)
{
const Cipher *c;
const struct sshcipher *c;
for (c = ciphers; c->name != NULL; c++)
if (strcmp(c->name, name) == 0)
return c;
return NULL;
}
const Cipher *
const struct sshcipher *
cipher_by_number(int id)
{
const Cipher *c;
const struct sshcipher *c;
for (c = ciphers; c->name != NULL; c++)
if (c->number == id)
return c;
@ -230,23 +231,22 @@ cipher_by_number(int id)
int
ciphers_valid(const char *names)
{
const 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);
free(cipher_list);
return 0;
}
}
debug3("ciphers ok: [%s]", names);
free(cipher_list);
return 1;
}
@ -259,7 +259,7 @@ ciphers_valid(const char *names)
int
cipher_number(const char *name)
{
const Cipher *c;
const struct sshcipher *c;
if (name == NULL)
return -1;
for (c = ciphers; c->name != NULL; c++)
@ -271,31 +271,33 @@ cipher_number(const char *name)
char *
cipher_name(int id)
{
const Cipher *c = cipher_by_number(id);
const struct sshcipher *c = cipher_by_number(id);
return (c==NULL) ? "<unknown>" : c->name;
}
void
cipher_init(CipherContext *cc, const 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)
{
#ifdef WITH_OPENSSL
static int dowarn = 1;
#ifdef SSH_OLD_EVP
EVP_CIPHER *type;
#else
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;
}
@ -303,71 +305,70 @@ cipher_init(CipherContext *cc, const Cipher *cipher,
cc->plaintext = (cipher->number == SSH_CIPHER_NONE);
cc->encrypt = do_encrypt;
if (keylen < cipher->key_len)
fatal("cipher_init: key length %d is insufficient for %s.",
keylen, cipher->name);
if (iv != NULL && ivlen < cipher_ivlen(cipher))
fatal("cipher_init: iv length %d is insufficient for %s.",
ivlen, cipher->name);
cc->cipher = cipher;
if (keylen < cipher->key_len ||
(iv != NULL && ivlen < cipher_ivlen(cipher)))
return SSH_ERR_INVALID_ARGUMENT;
cc->cipher = cipher;
if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) {
chachapoly_init(&cc->cp_ctx, key, keylen);
return;
return chachapoly_init(&cc->cp_ctx, key, keylen);
}
#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;
return 0;
}
if ((cc->cipher->flags & CFLAG_NONE) != 0)
return;
fatal("unsupported cipher");
return 0;
return SSH_ERR_INVALID_ARGUMENT;
#else
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;
}
EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv,
(do_encrypt == CIPHER_ENCRYPT));
#else
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))
fatal("cipher_init: EVP_CTRL_GCM_SET_IV_FIXED failed for %s",
cipher->name);
-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");
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;
}
/*
@ -379,16 +380,15 @@ cipher_init(CipherContext *cc, const Cipher *cipher,
* 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.
* cipher_crypt() returns 0 on success and -1 if the decryption integrity
* check fails.
*/
int
cipher_crypt(CipherContext *cc, u_int seqnr, u_char *dest, const u_char *src,
u_int len, u_int aadlen, u_int authlen)
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);
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)
@ -401,46 +401,43 @@ cipher_crypt(CipherContext *cc, u_int seqnr, u_char *dest, const u_char *src,
memcpy(dest, src, aadlen + len);
return 0;
}
fatal("unsupported cipher");
return SSH_ERR_INVALID_ARGUMENT;
#else
if (authlen) {
u_char lastiv[1];
if (authlen != cipher_authlen(cc->cipher))
fatal("%s: authlen mismatch %d", __func__, authlen);
return SSH_ERR_INVALID_ARGUMENT;
/* increment IV */
if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN,
1, lastiv))
fatal("%s: EVP_CTRL_GCM_IV_GEN", __func__);
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))
fatal("%s: EVP_CTRL_GCM_SET_TAG", __func__);
return SSH_ERR_LIBCRYPTO_ERROR;
}
if (aadlen) {
if (authlen &&
EVP_Cipher(&cc->evp, NULL, (u_char *)src, aadlen) < 0)
fatal("%s: EVP_Cipher(aad) failed", __func__);
return SSH_ERR_LIBCRYPTO_ERROR;
memcpy(dest, src, aadlen);
}
if (len % cc->cipher->block_size)
fatal("%s: bad plaintext length %d", __func__, len);
return SSH_ERR_INVALID_ARGUMENT;
if (EVP_Cipher(&cc->evp, dest + aadlen, (u_char *)src + aadlen,
len) < 0)
fatal("%s: EVP_Cipher failed", __func__);
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) {
if (cc->encrypt)
fatal("%s: EVP_Cipher(final) failed", __func__);
else
return -1;
}
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))
fatal("%s: EVP_CTRL_GCM_GET_TAG", __func__);
return SSH_ERR_LIBCRYPTO_ERROR;
}
return 0;
#endif
@ -448,61 +445,65 @@ cipher_crypt(CipherContext *cc, u_int seqnr, u_char *dest, const u_char *src,
/* Extract the packet length, including any decryption necessary beforehand */
int
cipher_get_length(CipherContext *cc, u_int *plenp, u_int seqnr,
cipher_get_length(struct sshcipher_ctx *cc, u_int *plenp, u_int seqnr,
const u_char *cp, u_int len)
{
if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0)
return chachapoly_get_length(&cc->cp_ctx, plenp, seqnr,
cp, len);
if (len < 4)
return -1;
return SSH_ERR_MESSAGE_INCOMPLETE;
*plenp = get_u32(cp);
return 0;
}
void
cipher_cleanup(CipherContext *cc)
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)
error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed");
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, const Cipher *cipher,
int
cipher_set_key_string(struct sshcipher_ctx *cc, const struct sshcipher *cipher,
const char *passphrase, int do_encrypt)
{
u_char digest[16];
int r = SSH_ERR_INTERNAL_ERROR;
if (ssh_digest_memory(SSH_DIGEST_MD5, passphrase, strlen(passphrase),
digest, sizeof(digest)) < 0)
fatal("%s: md5 failed", __func__);
cipher_init(cc, cipher, digest, 16, NULL, 0, do_encrypt);
if ((r = ssh_digest_memory(SSH_DIGEST_MD5,
passphrase, strlen(passphrase),
digest, sizeof(digest))) != 0)
goto out;
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)
{
const Cipher *c = cc->cipher;
const struct sshcipher *c = cc->cipher;
int ivlen = 0;
if (c->number == SSH_CIPHER_3DES)
@ -512,77 +513,25 @@ cipher_get_keyiv_len(const CipherContext *cc)
#ifdef WITH_OPENSSL
else
ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp);
#endif
#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)
{
const Cipher *c = cc->cipher;
const struct sshcipher *c = cc->cipher;
#ifdef WITH_OPENSSL
int evplen;
#endif
if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0) {
if (len != 0)
fatal("%s: wrong iv length %d != %d", __func__, len, 0);
return;
return SSH_ERR_INVALID_ARGUMENT;
return 0;
}
if ((cc->cipher->flags & CFLAG_NONE) != 0)
return;
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;
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
#endif /* USE_BUILTIN_RIJNDAEL */
#ifndef OPENSSL_HAVE_EVPCTR
if (c->evptype == evp_aes_128_ctr)
ssh_aes_ctr_iv(&cc->evp, 0, iv, len);
else
#endif /* OPENSSL_HAVE_EVPCTR */
if (cipher_authlen(c)) {
if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN,
len, iv))
fatal("%s: EVP_CTRL_GCM_IV_GEN", __func__);
} else
memcpy(iv, cc->evp.iv, len);
break;
#endif /* WITH_OPENSSL */
#ifdef WITH_SSH1
case SSH_CIPHER_3DES:
ssh1_3des_iv(&cc->evp, 0, iv, 24);
break;
#endif /* WITH_SSH1 */
default:
fatal("%s: bad cipher %d", __func__, c->number);
}
}
void
cipher_set_keyiv(CipherContext *cc, u_char *iv)
{
const Cipher *c = cc->cipher;
#ifdef WITH_OPENSSL
int evplen = 0;
#endif
if ((cc->cipher->flags & CFLAG_CHACHAPOLY) != 0)
return;
if ((cc->cipher->flags & CFLAG_NONE) != 0)
return;
return 0;
switch (c->number) {
#ifdef WITH_OPENSSL
@ -591,41 +540,79 @@ cipher_set_keyiv(CipherContext *cc, u_char *iv)
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);
else
#endif /* USE_BUILTIN_RIJNDAEL */
#ifndef OPENSSL_HAVE_EVPCTR
if (c->evptype == evp_aes_128_ctr)
ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen);
else
#endif /* OPENSSL_HAVE_EVPCTR */
return 0;
else if (evplen < 0)
return SSH_ERR_LIBCRYPTO_ERROR;
if ((u_int)evplen != len)
return SSH_ERR_INVALID_ARGUMENT;
if (cipher_authlen(c)) {
if (!EVP_CIPHER_CTX_ctrl(&cc->evp,
EVP_CTRL_GCM_SET_IV_FIXED, -1, iv))
fatal("%s: EVP_CTRL_GCM_SET_IV_FIXED failed",
__func__);
if (!EVP_CIPHER_CTX_ctrl(&cc->evp, EVP_CTRL_GCM_IV_GEN,
len, iv))
return SSH_ERR_LIBCRYPTO_ERROR;
} else
memcpy(cc->evp.iv, iv, evplen);
memcpy(iv, cc->evp.iv, len);
break;
#endif /* WITH_OPENSSL */
#endif
#ifdef WITH_SSH1
case SSH_CIPHER_3DES:
ssh1_3des_iv(&cc->evp, 1, iv, 24);
break;
#endif /* WITH_SSH1 */
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;
}
int
cipher_get_keycontext(const CipherContext *cc, u_char *dat)
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 struct sshcipher_ctx *cc, u_char *dat)
{
#ifdef WITH_OPENSSL
const Cipher *c = cc->cipher;
const struct sshcipher *c = cc->cipher;
int plen = 0;
if (c->evptype == EVP_rc4) {
@ -636,15 +623,15 @@ cipher_get_keycontext(const CipherContext *cc, u_char *dat)
}
return (plen);
#else
return (0);
return 0;
#endif
}
void
cipher_set_keycontext(CipherContext *cc, u_char *dat)
cipher_set_keycontext(struct sshcipher_ctx *cc, const u_char *dat)
{
#ifdef WITH_OPENSSL
const Cipher *c = cc->cipher;
const struct sshcipher *c = cc->cipher;
int plen;
if (c->evptype == EVP_rc4) {

57
cipher.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: cipher.h,v 1.45 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: cipher.h,v 1.46 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
@ -37,6 +37,7 @@
#ifndef CIPHER_H
#define CIPHER_H
#include <sys/types.h>
#include <openssl/evp.h>
#include "cipher-chachapoly.h"
#include "cipher-aesctr.h"
@ -61,45 +62,47 @@
#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;
struct chachapoly_ctx cp_ctx; /* XXX union with evp? */
struct aesctr_ctx ac_ctx; /* XXX union with evp? */
const Cipher *cipher;
const struct sshcipher *cipher;
};
typedef struct sshcipher Cipher ;
typedef struct sshcipher_ctx CipherContext ;
u_int cipher_mask_ssh1(int);
const Cipher *cipher_by_name(const char *);
const 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);
int ciphers_valid(const char *);
char *cipher_alg_list(char, int);
void cipher_init(CipherContext *, const Cipher *, const u_char *, u_int,
const u_char *, u_int, int);
int cipher_crypt(CipherContext *, u_int, u_char *, const u_char *,
int cipher_init(struct sshcipher_ctx *, const struct sshcipher *,
const u_char *, u_int, const u_char *, u_int, int);
const char* cipher_warning_message(const struct sshcipher_ctx *);
int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *,
u_int, u_int, u_int);
int cipher_get_length(CipherContext *, u_int *, u_int,
int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int,
const u_char *, u_int);
void cipher_cleanup(CipherContext *);
void cipher_set_key_string(CipherContext *, const Cipher *, const char *, int);
u_int cipher_blocksize(const Cipher *);
u_int cipher_keylen(const Cipher *);
u_int cipher_seclen(const Cipher *);
u_int cipher_authlen(const Cipher *);
u_int cipher_ivlen(const Cipher *);
u_int cipher_is_cbc(const Cipher *);
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 */

27
digest-libc.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: digest-libc.c,v 1.2 2014/02/02 03:44:31 djm Exp $ */
/* $OpenBSD: digest-libc.c,v 1.3 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2013 Damien Miller <djm@mindrot.org>
* Copyright (c) 2014 Markus Friedl. All rights reserved.
@ -28,7 +28,8 @@
#include <sha1.h>
#include <sha2.h>
#include "buffer.h"
#include "ssherr.h"
#include "sshbuf.h"
#include "digest.h"
typedef void md_init_fn(void *mdctx);
@ -164,7 +165,7 @@ 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 -1;
return SSH_ERR_INVALID_ARGUMENT;
memcpy(to->mdctx, from->mdctx, digest->ctx_len);
return 0;
}
@ -175,15 +176,15 @@ 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 -1;
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 Buffer *b)
ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const struct sshbuf *b)
{
return ssh_digest_update(ctx, buffer_ptr(b), buffer_len(b));
return ssh_digest_update(ctx, sshbuf_ptr(b), sshbuf_len(b));
}
int
@ -192,11 +193,11 @@ 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 -1;
return SSH_ERR_INVALID_ARGUMENT;
if (dlen > UINT_MAX)
return -1;
return SSH_ERR_INVALID_ARGUMENT;
if (dlen < digest->digest_len) /* No truncation allowed */
return -1;
return SSH_ERR_INVALID_ARGUMENT;
digest->md_final(d, ctx->mdctx);
return 0;
}
@ -223,16 +224,16 @@ 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 -1;
return SSH_ERR_INVALID_ARGUMENT;
if (ssh_digest_update(ctx, m, mlen) != 0 ||
ssh_digest_final(ctx, d, dlen) != 0)
return -1;
return SSH_ERR_INVALID_ARGUMENT;
ssh_digest_free(ctx);
return 0;
}
int
ssh_digest_buffer(int alg, const Buffer *b, u_char *d, size_t dlen)
ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen)
{
return ssh_digest_memory(alg, buffer_ptr(b), buffer_len(b), d, dlen);
return ssh_digest_memory(alg, sshbuf_ptr(b), sshbuf_len(b), d, dlen);
}

36
digest-openssl.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: digest-openssl.c,v 1.2 2014/02/02 03:44:31 djm Exp $ */
/* $OpenBSD: digest-openssl.c,v 1.3 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2013 Damien Miller <djm@mindrot.org>
*
@ -26,8 +26,9 @@
#include "openbsd-compat/openssl-compat.h"
#include "buffer.h"
#include "sshbuf.h"
#include "digest.h"
#include "ssherr.h"
struct ssh_digest_ctx {
int alg;
@ -98,9 +99,11 @@ ssh_digest_start(int alg)
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 -1;
return SSH_ERR_LIBCRYPTO_ERROR;
return 0;
}
@ -108,14 +111,14 @@ int
ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen)
{
if (EVP_DigestUpdate(&ctx->mdctx, m, mlen) != 1)
return -1;
return SSH_ERR_LIBCRYPTO_ERROR;
return 0;
}
int
ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const Buffer *b)
ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const struct sshbuf *b)
{
return ssh_digest_update(ctx, buffer_ptr(b), buffer_len(b));
return ssh_digest_update(ctx, sshbuf_ptr(b), sshbuf_len(b));
}
int
@ -125,13 +128,13 @@ ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen)
u_int l = dlen;
if (dlen > UINT_MAX)
return -1;
return SSH_ERR_INVALID_ARGUMENT;
if (dlen < digest->digest_len) /* No truncation allowed */
return -1;
return SSH_ERR_INVALID_ARGUMENT;
if (EVP_DigestFinal_ex(&ctx->mdctx, d, &l) != 1)
return -1;
return SSH_ERR_LIBCRYPTO_ERROR;
if (l != digest->digest_len) /* sanity */
return -1;
return SSH_ERR_INTERNAL_ERROR;
return 0;
}
@ -149,18 +152,19 @@ 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);
int r;
if (ctx == NULL)
return -1;
if (ssh_digest_update(ctx, m, mlen) != 0 ||
ssh_digest_final(ctx, d, dlen) != 0)
return -1;
return SSH_ERR_INVALID_ARGUMENT;
if ((r = ssh_digest_update(ctx, m, mlen) != 0) ||
(r = ssh_digest_final(ctx, d, dlen) != 0))
return r;
ssh_digest_free(ctx);
return 0;
}
int
ssh_digest_buffer(int alg, const Buffer *b, u_char *d, size_t dlen)
ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen)
{
return ssh_digest_memory(alg, buffer_ptr(b), buffer_len(b), d, dlen);
return ssh_digest_memory(alg, sshbuf_ptr(b), sshbuf_len(b), d, dlen);
}

7
digest.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: digest.h,v 1.4 2014/05/02 03:27:54 djm Exp $ */
/* $OpenBSD: digest.h,v 1.5 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2013 Damien Miller <djm@mindrot.org>
*
@ -47,14 +47,15 @@ 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 Buffer *b, u_char *d, size_t dlen)
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 Buffer *b);
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);

4
dns.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: dns.c,v 1.30 2014/04/20 09:24:26 logan Exp $ */
/* $OpenBSD: dns.c,v 1.31 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2003 Wesley Griffin. All rights reserved.
@ -34,6 +34,8 @@
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include "xmalloc.h"
#include "key.h"

2
entropy.c
View File

@ -43,6 +43,8 @@
#include <openssl/crypto.h>
#include <openssl/err.h>
#include "openbsd-compat/openssl-compat.h"
#include "ssh.h"
#include "misc.h"
#include "xmalloc.h"

5
hmac.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: hmac.h,v 1.8 2014/05/02 03:27:54 djm Exp $ */
/* $OpenBSD: hmac.h,v 1.9 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2014 Markus Friedl. All rights reserved.
*
@ -21,6 +21,7 @@
/* 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);
@ -29,7 +30,7 @@ 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 Buffer *b);
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);

3
hostfile.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: hostfile.c,v 1.56 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: hostfile.c,v 1.57 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -47,6 +47,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "xmalloc.h"
#include "match.h"

2855
key.c
View File

File diff suppressed because it is too large Load Diff

163
key.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: key.h,v 1.41 2014/01/09 23:20:00 djm Exp $ */
/* $OpenBSD: key.h,v 1.42 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@ -26,141 +26,86 @@
#ifndef KEY_H
#define KEY_H
#include "buffer.h"
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#ifdef OPENSSL_HAS_ECC
#include <openssl/ec.h>
#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_fingerprint sshkey_fingerprint
#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_names_valid2 sshkey_names_valid2
#define key_is_cert sshkey_is_cert
#define key_type_plain sshkey_type_plain
#define key_cert_is_legacy sshkey_cert_is_legacy
#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
#define key_fingerprint sshkey_fingerprint
#endif
typedef struct Key Key;
enum types {
KEY_RSA1,
KEY_RSA,
KEY_DSA,
KEY_ECDSA,
KEY_ED25519,
KEY_RSA_CERT,
KEY_DSA_CERT,
KEY_ECDSA_CERT,
KEY_ED25519_CERT,
KEY_RSA_CERT_V00,
KEY_DSA_CERT_V00,
KEY_UNSPEC
};
enum fp_type {
SSH_FP_SHA1,
SSH_FP_MD5,
SSH_FP_SHA256
};
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;
u_char *ed25519_sk;
u_char *ed25519_pk;
};
#define ED25519_SK_SZ crypto_sign_ed25519_SECRETKEYBYTES
#define ED25519_PK_SZ crypto_sign_ed25519_PUBLICKEYBYTES
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(const Key *, enum fp_type, enum fp_rep);
u_char *key_fingerprint_raw(const 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 *);
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_is_cert(int);
int key_type_plain(int);
int key_to_certified(Key *, int);
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(const 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 *);
int key_ec_nid_to_hash_alg(int nid);
#ifdef WITH_OPENSSL
int key_ec_validate_public(const EC_GROUP *, const EC_POINT *);
int key_ec_validate_private(const EC_KEY *);
#endif
char *key_alg_list(int, int);
#endif /* WITH_OPENSSL */
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 *);
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);
int ssh_ed25519_sign(const Key *, u_char **, u_int *, const u_char *, u_int);
int ssh_ed25519_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
void key_private_serialize(const Key *, Buffer *);
Key *key_private_deserialize(Buffer *);
/* 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 *);
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);
#endif

8
krl.c
View File

@ -14,7 +14,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $OpenBSD: krl.c,v 1.16 2014/06/24 00:52:02 djm Exp $ */
/* $OpenBSD: krl.c,v 1.17 2014/06/24 01:13:21 djm Exp $ */
#include "includes.h"
@ -366,7 +366,7 @@ plain_key_blob(const Key *key, u_char **blob, u_int *blen)
}
r = key_to_blob(kcopy, blob, blen);
free(kcopy);
return r == 0 ? -1 : 0;
return r;
}
/* Revoke a key blob. Ownership of blob is transferred to the tree */
@ -394,7 +394,7 @@ ssh_krl_revoke_key_explicit(struct ssh_krl *krl, const Key *key)
u_int len;
debug3("%s: revoke type %s", __func__, key_type(key));
if (plain_key_blob(key, &blob, &len) != 0)
if (plain_key_blob(key, &blob, &len) < 0)
return -1;
return revoke_blob(&krl->revoked_keys, blob, len);
}
@ -1130,7 +1130,7 @@ is_key_revoked(struct ssh_krl *krl, const Key *key)
/* Next, explicit keys */
memset(&rb, 0, sizeof(rb));
if (plain_key_blob(key, &rb.blob, &rb.len) != 0)
if (plain_key_blob(key, &rb.blob, &rb.len) < 0)
return -1;
erb = RB_FIND(revoked_blob_tree, &krl->revoked_keys, &rb);
free(rb.blob);

5
monitor.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: monitor.c,v 1.133 2014/05/03 17:20:34 markus Exp $ */
/* $OpenBSD: monitor.c,v 1.134 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* Copyright 2002 Markus Friedl <markus@openbsd.org>
@ -40,9 +40,10 @@
#endif
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_POLL_H
#include <poll.h>

141
openbsd-compat/openssl-compat.c
View File

@ -1,4 +1,4 @@
/* $Id: openssl-compat.c,v 1.18 2014/06/17 13:06:08 dtucker Exp $ */
/* $Id: openssl-compat.c,v 1.19 2014/07/02 05:28:07 djm Exp $ */
/*
* Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
@ -16,6 +16,7 @@
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS
#include "includes.h"
#include <stdarg.h>
@ -26,13 +27,8 @@
# include <openssl/conf.h>
#endif
#ifndef HAVE_RSA_GET_DEFAULT_METHOD
# include <openssl/rsa.h>
#endif
#include "log.h"
#define SSH_DONT_OVERLOAD_OPENSSL_FUNCS
#include "openssl-compat.h"
/*
@ -70,139 +66,6 @@ ssh_compatible_openssl(long headerver, long libver)
return 0;
}
#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;
}
int
ssh_EVP_Cipher(EVP_CIPHER_CTX *evp, char *dst, char *src, int len)
{
EVP_Cipher(evp, dst, src, len);
return 1;
}
int
ssh_EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *evp)
{
EVP_CIPHER_CTX_cleanup(evp);
return 1;
}
#endif
#ifndef HAVE_EVP_DIGESTINIT_EX
int
EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *md, void *engine)
{
if (engine != NULL)
fatal("%s: ENGINE is not supported", __func__);
# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
EVP_DigestInit(ctx, md);
return 1;
# else
return EVP_DigestInit(ctx, md);
# endif
}
#endif
#ifndef HAVE_EVP_DIGESTFINAL_EX
int
EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s)
{
# ifdef OPENSSL_EVP_DIGESTUPDATE_VOID
EVP_DigestFinal(ctx, md, s);
return 1;
# else
return EVP_DigestFinal(ctx, md, s);
# endif
}
#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_EVP_MD_CTX_COPY_EX
int
EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
return EVP_MD_CTX_copy(out, in);
}
#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)

118
openbsd-compat/openssl-compat.h
View File

@ -1,4 +1,4 @@
/* $Id: openssl-compat.h,v 1.27 2014/06/17 13:06:08 dtucker Exp $ */
/* $Id: openssl-compat.h,v 1.28 2014/07/02 05:28:07 djm Exp $ */
/*
* Copyright (c) 2005 Darren Tucker <dtucker@zip.com.au>
@ -24,22 +24,8 @@
int ssh_compatible_openssl(long, long);
/* 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
#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)
#if (OPENSSL_VERSION_NUMBER <= 0x0090805fL)
#error OpenSSL 0.9.8f or greater is required
#endif
#if OPENSSL_VERSION_NUMBER < 0x10000001L
@ -48,31 +34,6 @@ int ssh_compatible_openssl(long, long);
# define LIBCRYPTO_EVP_INL_TYPE size_t
#endif
#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
# define USE_BUILTIN_RIJNDAEL
#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
const EVP_CIPHER *evp_rijndael(void);
void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
#endif
#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
/* 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
@ -90,26 +51,9 @@ void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, size_t);
# endif
#endif
#if OPENSSL_VERSION_NUMBER < 0x00907000L
#define EVP_X_STATE(evp) &(evp).c
#define EVP_X_STATE_LEN(evp) sizeof((evp).c)
#else
#define EVP_X_STATE(evp) (evp).cipher_data
#define EVP_X_STATE_LEN(evp) (evp).cipher->ctx_size
#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
@ -117,19 +61,6 @@ 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
@ -137,48 +68,7 @@ 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
# ifndef HAVE_EVP_DIGESTINIT_EX
int EVP_DigestInit_ex(EVP_MD_CTX *, const EVP_MD *, void *);
# endif
# ifndef HAVE_EVP_DISESTFINAL_EX
int EVP_DigestFinal_ex(EVP_MD_CTX *, unsigned char *, unsigned int *);
# endif
# ifndef EVP_MD_CTX_COPY_EX
int EVP_MD_CTX_copy_ex(EVP_MD_CTX *, const EVP_MD_CTX *);
# 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);
# ifndef HAVE_HMAC_CTX_INIT
# define HMAC_CTX_init(a)
# endif
# ifndef HAVE_EVP_MD_CTX_INIT
# define EVP_MD_CTX_init(a)
# endif
# ifndef HAVE_EVP_MD_CTX_CLEANUP
# define EVP_MD_CTX_cleanup(a)
# endif
#endif /* SSH_DONT_OVERLOAD_OPENSSL_FUNCS */

38
packet.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: packet.c,v 1.196 2014/05/03 17:20:34 markus Exp $ */
/* $OpenBSD: packet.c,v 1.197 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -78,6 +78,7 @@
#include "canohost.h"
#include "misc.h"
#include "ssh.h"
#include "ssherr.h"
#include "roaming.h"
#ifdef PACKET_DEBUG
@ -222,6 +223,7 @@ void
packet_set_connection(int fd_in, int fd_out)
{
const Cipher *none = cipher_by_name("none");
int r;
if (none == NULL)
fatal("packet_set_connection: cannot load cipher 'none'");
@ -229,10 +231,11 @@ packet_set_connection(int fd_in, int fd_out)
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);
if ((r = cipher_init(&active_state->send_context, none,
(const u_char *)"", 0, NULL, 0, CIPHER_ENCRYPT)) != 0 ||
(r = cipher_init(&active_state->receive_context, none,
(const u_char *)"", 0, NULL, 0, CIPHER_DECRYPT)) != 0)
fatal("%s: cipher_init: %s", __func__, ssh_err(r));
active_state->newkeys[MODE_IN] = active_state->newkeys[MODE_OUT] = NULL;
if (!active_state->initialized) {
active_state->initialized = 1;
@ -329,13 +332,15 @@ void
packet_get_keyiv(int mode, u_char *iv, u_int len)
{
CipherContext *cc;
int r;
if (mode == MODE_OUT)
cc = &active_state->send_context;
else
cc = &active_state->receive_context;
cipher_get_keyiv(cc, iv, len);
if ((r = cipher_get_keyiv(cc, iv, len)) != 0)
fatal("%s: cipher_get_keyiv: %s", __func__, ssh_err(r));
}
int
@ -381,13 +386,15 @@ void
packet_set_iv(int mode, u_char *dat)
{
CipherContext *cc;
int r;
if (mode == MODE_OUT)
cc = &active_state->send_context;
else
cc = &active_state->receive_context;
cipher_set_keyiv(cc, dat);
if ((r = cipher_set_keyiv(cc, dat)) != 0)
fatal("%s: cipher_set_keyiv: %s", __func__, ssh_err(r));
}
int
@ -552,6 +559,7 @@ void
packet_set_encryption_key(const u_char *key, u_int keylen, int number)
{
const Cipher *cipher = cipher_by_number(number);
int r;
if (cipher == NULL)
fatal("packet_set_encryption_key: unknown cipher number %d", number);
@ -561,10 +569,11 @@ packet_set_encryption_key(const u_char *key, u_int keylen, int number)
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);
if ((r = cipher_init(&active_state->send_context, cipher,
key, keylen, NULL, 0, CIPHER_ENCRYPT)) != 0 ||
(r = cipher_init(&active_state->receive_context, cipher,
key, keylen, NULL, 0, CIPHER_DECRYPT)) != 0)
fatal("%s: cipher_init: %s", __func__, ssh_err(r));
}
u_int
@ -744,7 +753,7 @@ set_newkeys(int mode)
Comp *comp;
CipherContext *cc;
u_int64_t *max_blocks;
int crypt_type;
int r, crypt_type;
debug2("set_newkeys: mode %d", mode);
@ -786,8 +795,9 @@ set_newkeys(int mode)
if (cipher_authlen(enc->cipher) == 0 && mac_init(mac) == 0)
mac->enabled = 1;
DBG(debug("cipher_init_context: %d", mode));
cipher_init(cc, enc->cipher, enc->key, enc->key_len,
enc->iv, enc->iv_len, crypt_type);
if ((r = cipher_init(cc, enc->cipher, enc->key, enc->key_len,
enc->iv, enc->iv_len, crypt_type)) != 0)
fatal("%s: cipher_init: %s", __func__, ssh_err(r));
/* Deleting the keys does not gain extra security */
/* explicit_bzero(enc->iv, enc->block_size);
explicit_bzero(enc->key, enc->key_len);

101
rsa.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: rsa.c,v 1.31 2014/02/02 03:44:31 djm Exp $ */
/* $OpenBSD: rsa.c,v 1.32 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -67,85 +67,122 @@
#include <stdarg.h>
#include <string.h>
#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;
out:
if (outbuf != NULL) {
explicit_bzero(outbuf, olen);
explicit_bzero(inbuf, ilen);
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;
}
r = 0;
out:
if (outbuf != NULL) {
explicit_bzero(outbuf, olen);
explicit_bzero(inbuf, ilen);
free(outbuf);
}
if (inbuf != NULL) {
explicit_bzero(inbuf, ilen);
free(inbuf);
return len;
}
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;
}

6
rsa.h
View File

@ -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 <ylo@cs.hut.fi>
@ -19,8 +19,8 @@
#include <openssl/bn.h>
#include <openssl/rsa.h>
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 */

24
ssh-add.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-add.c,v 1.109 2014/02/02 03:44:31 djm Exp $ */
/* $OpenBSD: ssh-add.c,v 1.110 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -62,6 +62,7 @@
#include "authfile.h"
#include "pathnames.h"
#include "misc.h"
#include "ssherr.h"
/* argv0 */
extern char *__progname;
@ -170,7 +171,7 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
Key *private, *cert;
char *comment = NULL;
char msg[1024], *certpath = NULL;
int fd, perms_ok, ret = -1;
int r, fd, perms_ok, ret = -1;
Buffer keyblob;
if (strcmp(filename, "-") == 0) {
@ -201,12 +202,18 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
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)
fatal("Cannot parse %s: %s", filename, ssh_err(r));
if (comment == NULL)
comment = xstrdup(filename);
/* try last */
if (private == NULL && pass != NULL)
private = key_parse_private(&keyblob, filename, pass, NULL);
if (private == NULL && pass != NULL) {
if ((r = sshkey_parse_private_fileblob(&keyblob, filename, pass,
&private, &comment)) != 0 &&
r != SSH_ERR_KEY_WRONG_PASSPHRASE)
fatal("Cannot parse %s: %s", filename, ssh_err(r));
}
if (private == NULL) {
/* clear passphrase since it did not work */
clear_pass();
@ -220,8 +227,11 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
buffer_free(&keyblob);
return -1;
}
private = key_parse_private(&keyblob, filename, pass,
&comment);
if ((r = sshkey_parse_private_fileblob(&keyblob,
filename, pass, &private, &comment)) != 0 &&
r != SSH_ERR_KEY_WRONG_PASSPHRASE)
fatal("Cannot parse %s: %s",
filename, ssh_err(r));
if (private != NULL)
break;
clear_pass();

24
ssh-agent.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-agent.c,v 1.185 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: ssh-agent.c,v 1.186 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -278,7 +278,7 @@ process_authentication_challenge1(SocketEntry *e)
if (id != NULL && (!id->confirm || confirm_key(id) == 0)) {
Key *private = id->key;
/* Decrypt the challenge using the private key. */
if (rsa_private_decrypt(challenge, challenge, private->rsa) <= 0)
if (rsa_private_decrypt(challenge, challenge, private->rsa) != 0)
goto failure;
/* The response is MD5 of decrypted challenge plus session id. */
@ -365,12 +365,16 @@ process_sign_request2(SocketEntry *e)
static void
process_remove_identity(SocketEntry *e, int version)
{
u_int blen, bits;
u_int blen;
int success = 0;
Key *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);
@ -381,6 +385,7 @@ process_remove_identity(SocketEntry *e, int version)
logit("Warning: identity keysize mismatch: actual %u, announced %u",
key_size(key), bits);
break;
#endif /* WITH_SSH1 */
case 2:
blob = buffer_get_string(&e->request, &blen);
key = key_from_blob(blob, blen);
@ -477,6 +482,7 @@ process_add_identity(SocketEntry *e, int version)
Key *k = NULL;
switch (version) {
#ifdef WITH_SSH1
case 1:
k = key_new_private(KEY_RSA1);
(void) buffer_get_int(&e->request); /* ignored */
@ -490,7 +496,9 @@ process_add_identity(SocketEntry *e, int version)
buffer_get_bignum(&e->request, k->rsa->p); /* q */
/* Generate additional parameters */
rsa_generate_additional_parameters(k->rsa);
if (rsa_generate_additional_parameters(k->rsa) != 0)
fatal("%s: rsa_generate_additional_parameters "
"error", __func__);
/* enable blinding */
if (RSA_blinding_on(k->rsa, NULL) != 1) {
@ -499,6 +507,7 @@ process_add_identity(SocketEntry *e, int version)
goto send;
}
break;
#endif /* WITH_SSH1 */
case 2:
k = key_private_deserialize(&e->request);
if (k == NULL) {
@ -507,11 +516,10 @@ process_add_identity(SocketEntry *e, int version)
}
break;
}
comment = buffer_get_string(&e->request, NULL);
if (k == NULL) {
free(comment);
if (k == NULL)
goto send;
}
comment = buffer_get_string(&e->request, NULL);
while (buffer_len(&e->request)) {
switch ((type = buffer_get_char(&e->request))) {
case SSH_AGENT_CONSTRAIN_LIFETIME:

235
ssh-dss.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-dss.c,v 1.31 2014/02/02 03:44:31 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.
*
@ -33,157 +33,186 @@
#include <stdarg.h>
#include <string.h>
#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;
DSA_SIG *sig = NULL;
u_char digest[SSH_DIGEST_MAX_LENGTH], sigblob[SIGBLOB_LEN];
u_int rlen, slen, len, dlen = ssh_digest_bytes(SSH_DIGEST_SHA1);
Buffer b;
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_type_plain(key->type) != KEY_DSA ||
key->dsa == NULL) {
error("%s: no DSA key", __func__);
return -1;
}
if (lenp != NULL)
*lenp = 0;
if (sigp != NULL)
*sigp = NULL;
if (ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: ssh_digest_memory failed", __func__);
return -1;
}
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;
sig = DSA_do_sign(digest, dlen, key->dsa);
explicit_bzero(digest, sizeof(digest));
if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen,
digest, sizeof(digest))) != 0)
goto out;
if (sig == NULL) {
error("ssh_dss_sign: sign failed");
return -1;
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;
}
explicit_bzero(sigblob, SIGBLOB_LEN);
BN_bn2bin(sig->r, sigblob+ SIGBLOB_LEN - INTBLOB_LEN - rlen);
BN_bn2bin(sig->s, sigblob+ SIGBLOB_LEN - slen);
DSA_SIG_free(sig);
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);
ret = 0;
}
buffer_free(&b);
}
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;
u_char digest[SSH_DIGEST_MAX_LENGTH], *sigblob;
u_int len, dlen = ssh_digest_bytes(SSH_DIGEST_SHA1);
int rlen, ret;
Buffer b;
if (key == NULL || key_type_plain(key->type) != KEY_DSA ||
key->dsa == NULL) {
error("%s: no DSA key", __func__);
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("%s: cannot handle type %s", __func__, ktype);
buffer_free(&b);
free(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;
}
free(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);
free(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("%s: DSA_SIG_new failed", __func__);
if ((sig->r = BN_new()) == NULL)
fatal("%s: BN_new failed", __func__);
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("%s: BN_bin2bn failed", __func__);
/* clean up */
explicit_bzero(sigblob, len);
free(sigblob);
/* sha1 the data */
if (ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: digest_memory failed", __func__);
return -1;
(BN_bin2bn(sigblob+ INTBLOB_LEN, INTBLOB_LEN, sig->s) == NULL)) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
ret = DSA_do_verify(digest, dlen, sig, key->dsa);
/* sha1 the data */
if ((ret = ssh_digest_memory(SSH_DIGEST_SHA1, data, datalen,
digest, sizeof(digest))) != 0)
goto out;
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;
}
out:
explicit_bzero(digest, sizeof(digest));
if (sig != NULL)
DSA_SIG_free(sig);
debug("%s: signature %s", __func__,
ret == 1 ? "correct" : ret == 0 ? "incorrect" : "error");
if (b != NULL)
sshbuf_free(b);
if (ktype != NULL)
free(ktype);
if (sigblob != NULL) {
explicit_bzero(sigblob, len);
free(sigblob);
}
return ret;
}

232
ssh-ecdsa.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-ecdsa.c,v 1.10 2014/02/03 23:28:00 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.
@ -37,141 +37,155 @@
#include <string.h>
#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;
ECDSA_SIG *sig = NULL;
int hash_alg;
u_char digest[SSH_DIGEST_MAX_LENGTH];
u_int len, dlen;
Buffer b, bb;
size_t len, dlen;
struct sshbuf *b = NULL, *bb = NULL;
int ret = SSH_ERR_INTERNAL_ERROR;
if (key == NULL || key_type_plain(key->type) != KEY_ECDSA ||
key->ecdsa == NULL) {
error("%s: no ECDSA key", __func__);
return -1;
if (lenp != NULL)
*lenp = 0;
if (sigp != NULL)
*sigp = 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;
if ((ret = ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest))) != 0)
goto out;
if ((sig = ECDSA_do_sign(digest, dlen, key->ecdsa)) == NULL) {
ret = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
hash_alg = key_ec_nid_to_hash_alg(key->ecdsa_nid);
if ((dlen = ssh_digest_bytes(hash_alg)) == 0) {
error("%s: bad hash algorithm %d", __func__, hash_alg);
return -1;
if ((bb = sshbuf_new()) == NULL || (b = sshbuf_new()) == NULL) {
ret = SSH_ERR_ALLOC_FAIL;
goto out;
}
if (ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: digest_memory failed", __func__);
return -1;
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;
}
sig = ECDSA_do_sign(digest, dlen, key->ecdsa);
explicit_bzero(digest, sizeof(digest));
if (sig == NULL) {
error("%s: sign failed", __func__);
return -1;
memcpy(*sigp, sshbuf_ptr(b), len);
}
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 (lenp != NULL)
*lenp = len;
if (sigp != NULL) {
*sigp = xmalloc(len);
memcpy(*sigp, buffer_ptr(&b), len);
}
buffer_free(&b);
return 0;
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;
}
int
ssh_ecdsa_verify(const Key *key, const u_char *signature, u_int signaturelen,
const u_char *data, u_int datalen)
{
ECDSA_SIG *sig;
int hash_alg;
u_char digest[SSH_DIGEST_MAX_LENGTH], *sigblob;
u_int len, dlen;
int rlen, ret;
Buffer b, bb;
char *ktype;
if (key == NULL || key_type_plain(key->type) != KEY_ECDSA ||
key->ecdsa == NULL) {
error("%s: no ECDSA key", __func__);
return -1;
}
/* 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 */
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);
free(ktype);
return -1;
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;
}
free(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);
free(sigblob);
return -1;
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)
fatal("%s: ECDSA_SIG_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__);
buffer_free(&bb);
/* clean up */
explicit_bzero(sigblob, len);
free(sigblob);
/* hash the data */
hash_alg = key_ec_nid_to_hash_alg(key->ecdsa_nid);
if ((dlen = ssh_digest_bytes(hash_alg)) == 0) {
error("%s: bad hash algorithm %d", __func__, hash_alg);
return -1;
if ((sig = ECDSA_SIG_new()) == NULL) {
ret = SSH_ERR_ALLOC_FAIL;
goto out;
}
if (ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: digest_memory failed", __func__);
return -1;
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;
}
ret = ECDSA_do_verify(digest, dlen, sig, key->ecdsa);
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);
debug("%s: signature %s", __func__,
ret == 1 ? "correct" : ret == 0 ? "incorrect" : "error");
free(ktype);
return ret;
}

175
ssh-ed25519.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-ed25519.c,v 1.3 2014/02/23 20:03:42 djm Exp $ */
/* $OpenBSD: ssh-ed25519.c,v 1.4 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2013 Markus Friedl <markus@openbsd.org>
*
@ -18,132 +18,149 @@
#include "includes.h"
#include <sys/types.h>
#include <limits.h>
#include "crypto_api.h"
#include <limits.h>
#include <string.h>
#include <stdarg.h>
#include "xmalloc.h"
#include "log.h"
#include "buffer.h"
#include "key.h"
#define SSHKEY_INTERNAL
#include "sshkey.h"
#include "ssherr.h"
#include "ssh.h"
int
ssh_ed25519_sign(const Key *key, u_char **sigp, u_int *lenp,
const u_char *data, u_int datalen)
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;
u_int slen, len;
u_char *sig = NULL;
size_t slen = 0, len;
unsigned long long smlen;
int ret;
Buffer b;
int r, ret;
struct sshbuf *b = NULL;
if (key == NULL || key_type_plain(key->type) != KEY_ED25519 ||
key->ed25519_sk == NULL) {
error("%s: no ED25519 key", __func__);
return -1;
}
if (lenp != NULL)
*lenp = 0;
if (sigp != NULL)
*sigp = NULL;
if (datalen >= UINT_MAX - crypto_sign_ed25519_BYTES) {
error("%s: datalen %u too long", __func__, datalen);
return -1;
}
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;
sig = xmalloc(slen);
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) {
error("%s: crypto_sign_ed25519 failed: %d", __func__, ret);
free(sig);
return -1;
r = SSH_ERR_INVALID_ARGUMENT; /* XXX better error? */
goto out;
}
/* encode signature */
buffer_init(&b);
buffer_put_cstring(&b, "ssh-ed25519");
buffer_put_string(&b, sig, smlen - datalen);
len = buffer_len(&b);
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;
if (sigp != NULL) {
*sigp = xmalloc(len);
memcpy(*sigp, buffer_ptr(&b), len);
}
buffer_free(&b);
/* success */
r = 0;
out:
sshbuf_free(b);
if (sig != NULL) {
explicit_bzero(sig, slen);
free(sig);
}
return 0;
return r;
}
int
ssh_ed25519_verify(const Key *key, const u_char *signature, u_int signaturelen,
const u_char *data, u_int datalen)
ssh_ed25519_verify(const struct sshkey *key,
const u_char *signature, size_t signaturelen,
const u_char *data, size_t datalen, u_int compat)
{
Buffer b;
char *ktype;
u_char *sigblob, *sm, *m;
u_int len;
unsigned long long smlen, mlen;
int rlen, ret;
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 || key_type_plain(key->type) != KEY_ED25519 ||
key->ed25519_pk == NULL) {
error("%s: no ED25519 key", __func__);
return -1;
}
buffer_init(&b);
buffer_append(&b, signature, signaturelen);
ktype = buffer_get_cstring(&b, NULL);
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) {
error("%s: cannot handle type %s", __func__, ktype);
buffer_free(&b);
free(ktype);
return -1;
r = SSH_ERR_KEY_TYPE_MISMATCH;
goto out;
}
free(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);
free(sigblob);
return -1;
if (sshbuf_len(b) != 0) {
r = SSH_ERR_UNEXPECTED_TRAILING_DATA;
goto out;
}
if (len > crypto_sign_ed25519_BYTES) {
error("%s: len %u > crypto_sign_ed25519_BYTES %u", __func__,
len, crypto_sign_ed25519_BYTES);
free(sigblob);
return -1;
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
if (datalen >= SIZE_MAX - len)
return SSH_ERR_INVALID_ARGUMENT;
smlen = len + datalen;
sm = xmalloc(smlen);
mlen = smlen;
if ((sm = malloc(smlen)) == NULL || (m = xmalloc(mlen)) == NULL) {
r = SSH_ERR_ALLOC_FAIL;
goto out;
}
memcpy(sm, sigblob, len);
memcpy(sm+len, data, datalen);
mlen = smlen;
m = xmalloc(mlen);
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) {
debug2("%s: crypto_sign_ed25519_open "
"mlen != datalen (%llu != %u)", __func__, mlen, datalen);
ret = -1;
if (ret != 0 || mlen != datalen) {
r = SSH_ERR_SIGNATURE_INVALID;
goto out;
}
/* XXX compare 'm' and 'data' ? */
explicit_bzero(sigblob, len);
/* success */
r = 0;
out:
if (sm != NULL) {
explicit_bzero(sm, smlen);
explicit_bzero(m, smlen); /* NB. mlen may be invalid if ret != 0 */
free(sigblob);
free(sm);
}
if (m != NULL) {
explicit_bzero(m, smlen); /* NB mlen may be invalid if r != 0 */
free(m);
debug("%s: signature %scorrect", __func__, (ret != 0) ? "in" : "");
/* translate return code carefully */
return (ret == 0) ? 1 : -1;
}
sshbuf_free(b);
free(ktype);
return r;
}

20
ssh-keygen.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-keygen.c,v 1.246 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: ssh-keygen.c,v 1.247 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -482,7 +482,9 @@ do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
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);
if (rsa_generate_additional_parameters(key->rsa) != 0)
fatal("%s: rsa_generate_additional_parameters "
"error", __func__);
break;
}
rlen = buffer_len(&b);
@ -1637,12 +1639,12 @@ do_ca_sign(struct passwd *pw, int argc, char **argv)
public->cert->valid_after = cert_valid_from;
public->cert->valid_before = cert_valid_to;
if (v00) {
prepare_options_buf(&public->cert->critical,
prepare_options_buf(public->cert->critical,
OPTIONS_CRITICAL|OPTIONS_EXTENSIONS);
} else {
prepare_options_buf(&public->cert->critical,
prepare_options_buf(public->cert->critical,
OPTIONS_CRITICAL);
prepare_options_buf(&public->cert->extensions,
prepare_options_buf(public->cert->extensions,
OPTIONS_EXTENSIONS);
}
public->cert->signature_key = key_from_private(ca);
@ -1913,19 +1915,19 @@ do_show_cert(struct passwd *pw)
printf("\n");
}
printf(" Critical Options: ");
if (buffer_len(&key->cert->critical) == 0)
if (buffer_len(key->cert->critical) == 0)
printf("(none)\n");
else {
printf("\n");
show_options(&key->cert->critical, v00, 1);
show_options(key->cert->critical, v00, 1);
}
if (!v00) {
printf(" Extensions: ");
if (buffer_len(&key->cert->extensions) == 0)
if (buffer_len(key->cert->extensions) == 0)
printf("(none)\n");
else {
printf("\n");
show_options(&key->cert->extensions, v00, 0);
show_options(key->cert->extensions, v00, 0);
}
}
exit(0);

4
ssh-pkcs11-client.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-pkcs11-client.c,v 1.4 2013/05/17 00:13:14 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 <unistd.h>
#include <errno.h>
#include <openssl/rsa.h>
#include "pathnames.h"
#include "xmalloc.h"
#include "buffer.h"

8
ssh-pkcs11-helper.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-pkcs11-helper.c,v 1.7 2013/12/02 02:56:17 djm Exp $ */
/* $OpenBSD: ssh-pkcs11-helper.c,v 1.8 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2010 Markus Friedl. All rights reserved.
*
@ -169,7 +169,7 @@ process_sign(void)
{
u_char *blob, *data, *signature = NULL;
u_int blen, dlen, slen = 0;
int ok = -1, ret;
int ok = -1;
Key *key, *found;
Buffer msg;
@ -179,6 +179,9 @@ process_sign(void)
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,
@ -186,6 +189,7 @@ process_sign(void)
slen = ret;
ok = 0;
}
#endif /* WITH_OPENSSL */
}
key_free(key);
}

4
ssh-pkcs11.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-pkcs11.c,v 1.13 2014/05/02 03:27:54 djm Exp $ */
/* $OpenBSD: ssh-pkcs11.c,v 1.14 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2010 Markus Friedl. All rights reserved.
*
@ -520,7 +520,7 @@ pkcs11_fetch_keys_filter(struct pkcs11_provider *p, CK_ULONG slotidx,
key = key_new(KEY_UNSPEC);
key->rsa = rsa;
key->type = KEY_RSA;
key->flags |= KEY_FLAG_EXT;
key->flags |= SSHKEY_FLAG_EXT;
if (pkcs11_key_included(keysp, nkeys, key)) {
key_free(key);
} else {

254
ssh-rsa.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-rsa.c,v 1.51 2014/02/02 03:44:31 djm Exp $ */
/* $OpenBSD: ssh-rsa.c,v 1.52 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2000, 2003 Markus Friedl <markus@openbsd.org>
*
@ -25,163 +25,167 @@
#include <stdarg.h>
#include <string.h>
#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)
{
int hash_alg;
u_char digest[SSH_DIGEST_MAX_LENGTH], *sig;
u_int slen, dlen, len;
int ok, nid;
Buffer b;
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_type_plain(key->type) != KEY_RSA ||
key->rsa == NULL) {
error("%s: no RSA key", __func__);
return -1;
}
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);
if (slen <= 0 || slen > SSHBUF_MAX_BIGNUM)
return SSH_ERR_INVALID_ARGUMENT;
/* hash the data */
hash_alg = SSH_DIGEST_SHA1;
nid = NID_sha1;
if ((dlen = ssh_digest_bytes(hash_alg)) == 0) {
error("%s: bad hash algorithm %d", __func__, hash_alg);
return -1;
}
if (ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: ssh_digest_memory failed", __func__);
return -1;
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 ((sig = malloc(slen)) == NULL) {
ret = SSH_ERR_ALLOC_FAIL;
goto out;
}
slen = RSA_size(key->rsa);
sig = xmalloc(slen);
ok = RSA_sign(nid, digest, dlen, sig, &len, key->rsa);
explicit_bzero(digest, sizeof(digest));
if (ok != 1) {
int ecode = ERR_get_error();
error("%s: RSA_sign failed: %s", __func__,
ERR_error_string(ecode, NULL));
free(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);
explicit_bzero(sig, diff);
} else if (len > slen) {
error("%s: slen %u slen2 %u", __func__, slen, len);
free(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);
}
buffer_free(&b);
ret = 0;
out:
explicit_bzero(digest, sizeof(digest));
if (sig != NULL) {
explicit_bzero(sig, slen);
free(sig);
}
if (b != NULL)
sshbuf_free(b);
return 0;
}
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;
int hash_alg;
char *ktype;
u_char digest[SSH_DIGEST_MAX_LENGTH], *sigblob;
u_int len, dlen, modlen;
int rlen, ret;
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_type_plain(key->type) != KEY_RSA ||
key->rsa == NULL) {
error("%s: no RSA key", __func__);
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 (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) {
error("%s: RSA modulus too small: %d < minimum %d bits",
__func__, BN_num_bits(key->rsa->n),
SSH_RSA_MINIMUM_MODULUS_SIZE);
return -1;
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;
}
buffer_init(&b);
buffer_append(&b, signature, signaturelen);
ktype = buffer_get_cstring(&b, NULL);
if (strcmp("ssh-rsa", ktype) != 0) {
error("%s: cannot handle type %s", __func__, ktype);
buffer_free(&b);
free(ktype);
return -1;
ret = SSH_ERR_KEY_TYPE_MISMATCH;
goto out;
}
free(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);
free(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("%s: len %u > modlen %u", __func__, len, modlen);
free(sigblob);
return -1;
ret = SSH_ERR_KEY_BITS_MISMATCH;
goto out;
} else if (len < modlen) {
u_int diff = modlen - len;
debug("%s: add padding: modlen %u > len %u", __func__,
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);
explicit_bzero(sigblob, diff);
len = modlen;
}
/* hash the data */
hash_alg = SSH_DIGEST_SHA1;
if ((dlen = ssh_digest_bytes(hash_alg)) == 0) {
error("%s: bad hash algorithm %d", __func__, hash_alg);
return -1;
}
if (ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest)) != 0) {
error("%s: ssh_digest_memory failed", __func__);
return -1;
ret = SSH_ERR_INTERNAL_ERROR;
goto out;
}
if ((ret = ssh_digest_memory(hash_alg, data, datalen,
digest, sizeof(digest))) != 0)
goto out;
ret = openssh_RSA_verify(hash_alg, digest, dlen, sigblob, len,
key->rsa);
explicit_bzero(digest, sizeof(digest));
out:
if (sigblob != NULL) {
explicit_bzero(sigblob, len);
free(sigblob);
debug("%s: signature %scorrect", __func__, (ret == 0) ? "in" : "");
}
if (ktype != NULL)
free(ktype);
if (b != NULL)
sshbuf_free(b);
explicit_bzero(digest, sizeof(digest));
return ret;
}
@ -204,15 +208,15 @@ static const u_char id_sha1[] = {
};
static int
openssh_RSA_verify(int hash_alg, 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;
ret = SSH_ERR_INTERNAL_ERROR;
switch (hash_alg) {
case SSH_DIGEST_SHA1:
oid = id_sha1;
@ -223,37 +227,39 @@ openssh_RSA_verify(int hash_alg, u_char *hash, u_int hashlen,
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) {
explicit_bzero(decrypted, rsasize);
free(decrypted);
}
return ret;
}

16
sshbuf-misc.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshbuf-misc.c,v 1.1 2014/04/30 05:29:56 djm Exp $ */
/* $OpenBSD: sshbuf-misc.c,v 1.2 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -33,12 +33,11 @@
#include "sshbuf.h"
void
sshbuf_dump(struct sshbuf *buf, FILE *f)
sshbuf_dump_data(const void *s, size_t len, FILE *f)
{
const u_char *p = sshbuf_ptr(buf);
size_t i, j, len = sshbuf_len(buf);
size_t i, j;
const u_char *p = (const u_char *)s;
fprintf(f, "buffer %p len = %zu\n", buf, len);
for (i = 0; i < len; i += 16) {
fprintf(f, "%.4zd: ", i);
for (j = i; j < i + 16; j++) {
@ -60,6 +59,13 @@ sshbuf_dump(struct sshbuf *buf, FILE *f)
}
}
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)
{

7
sshbuf.h
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshbuf.h,v 1.2 2014/06/10 21:46:11 dtucker Exp $ */
/* $OpenBSD: sshbuf.h,v 1.3 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2011 Damien Miller
*
@ -216,9 +216,12 @@ 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
/* Dump the contents of the buffer to stderr in a human-readable format */
/* 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);

4
sshconnect.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect.c,v 1.248 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: sshconnect.c,v 1.249 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -709,7 +709,7 @@ 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;

18
sshconnect1.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect1.c,v 1.74 2014/02/02 03:44:32 djm Exp $ */
/* $OpenBSD: sshconnect1.c,v 1.75 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -166,7 +166,7 @@ respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv)
/* 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");
@ -253,7 +253,7 @@ 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,
@ -302,7 +302,7 @@ 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. */
@ -592,8 +592,9 @@ 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) <
@ -604,8 +605,9 @@ 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. */

8
sshconnect2.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect2.c,v 1.208 2014/06/05 22:17:50 djm Exp $ */
/* $OpenBSD: sshconnect2.c,v 1.209 2014/06/24 01:13:21 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
* Copyright (c) 2008 Damien Miller. All rights reserved.
@ -970,7 +970,7 @@ identity_sign(Identity *id, u_char **sigp, u_int *lenp,
* 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))
if (id->isprivate || (id->key->flags & SSHKEY_FLAG_EXT))
return (key_sign(id->key, sigp, lenp, data, datalen));
/* load the private key from the file */
if ((prv = load_identity_file(id->filename, id->userprovided)) == NULL)
@ -1178,12 +1178,12 @@ pubkey_prepare(Authctxt *authctxt)
}
/* Prefer PKCS11 keys that are explicitly listed */
TAILQ_FOREACH_SAFE(id, &files, next, tmp) {
if (id->key == NULL || (id->key->flags & KEY_FLAG_EXT) == 0)
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 & KEY_FLAG_EXT) == 0)
(id2->key->flags & SSHKEY_FLAG_EXT) == 0)
continue;
if (key_equal(id->key, id2->key)) {
TAILQ_REMOVE(&files, id, next);

16
sshd.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshd.c,v 1.426 2014/04/29 18:01:49 markus Exp $ */
/* $OpenBSD: sshd.c,v 1.427 2014/06/24 01:13:21 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -1031,8 +1031,10 @@ 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__);
#else
fatal("ssh1 not supported");
#endif
@ -2215,10 +2217,10 @@ 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). */
@ -2233,10 +2235,10 @@ 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);

3843
sshkey.c Normal file
View File

File diff suppressed because it is too large Load Diff

222
sshkey.h Normal file
View File

@ -0,0 +1,222 @@
/* $OpenBSD: sshkey.h,v 1.1 2014/06/24 01:16:58 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 <sys/types.h>
#ifdef WITH_OPENSSL
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#include <openssl/ec.h>
#else /* 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_RSA_CERT_V00,
KEY_DSA_CERT_V00,
KEY_UNSPEC
};
/* Fingerprint hash algorithms */
enum sshkey_fp_type {
SSH_FP_SHA1,
SSH_FP_MD5,
SSH_FP_SHA256
};
/* Fingerprint representation formats */
enum sshkey_fp_rep {
SSH_FP_HEX,
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 *,
enum sshkey_fp_type, enum sshkey_fp_rep);
int sshkey_fingerprint_raw(const struct sshkey *k,
enum sshkey_fp_type dgst_type, 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);
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_cert_is_legacy(const struct sshkey *);
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 *);
char *key_alg_list(int, int);
int sshkey_from_blob(const u_char *, size_t, struct sshkey **);
int sshkey_to_blob_buf(const struct sshkey *, struct sshbuf *);
int sshkey_to_blob(const struct sshkey *, u_char **, size_t *);
int sshkey_plain_to_blob_buf(const struct sshkey *, struct sshbuf *);
int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *);
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_pem_fileblob(struct sshbuf *blob, int type,
const char *passphrase, 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
#ifndef WITH_OPENSSL
#undef RSA
#undef DSA
#undef EC_KEY
#undef EC_GROUP
#undef EC_POINT
#endif /* WITH_OPENSSL */
#endif /* SSHKEY_H */