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- markus@cvs.openbsd.org 2001/03/27 10:57:00

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[compat.c compat.h ssh-rsa.c]
     some older systems use NID_md5 instead of NID_sha1 for RSASSA-PKCS1-v1_5
     signatures in SSH protocol 2, ok djm@
This commit is contained in:
Ben Lindstrom 2001-03-29 00:32:56 +00:00
parent 425fb02f20
commit 60a4381f1a
4 changed files with 21 additions and 11 deletions
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6
ChangeLog
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@ -12,6 +12,10 @@
- markus@cvs.openbsd.org 2001/03/27 10:34:08 - markus@cvs.openbsd.org 2001/03/27 10:34:08
[ssh-rsa.c sshd.c] [ssh-rsa.c sshd.c]
use EVP_get_digestbynid, reorder some calls and fix missing free. use EVP_get_digestbynid, reorder some calls and fix missing free.
- markus@cvs.openbsd.org 2001/03/27 10:57:00
[compat.c compat.h ssh-rsa.c]
some older systems use NID_md5 instead of NID_sha1 for RSASSA-PKCS1-v1_5
signatures in SSH protocol 2, ok djm@
20010328 20010328
- (djm) Reorder tests and library inclusion for Krb4/AFS to try to - (djm) Reorder tests and library inclusion for Krb4/AFS to try to
@ -4750,4 +4754,4 @@
- Wrote replacements for strlcpy and mkdtemp - Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1 - Released 1.0pre1
$Id: ChangeLog,v 1.1029 2001/03/29 00:31:20 mouring Exp $ $Id: ChangeLog,v 1.1030 2001/03/29 00:32:56 mouring Exp $

16
compat.c
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@ -23,7 +23,7 @@
*/ */
#include "includes.h" #include "includes.h"
RCSID("$OpenBSD: compat.c,v 1.40 2001/03/23 11:04:06 djm Exp $"); RCSID("$OpenBSD: compat.c,v 1.41 2001/03/27 10:57:00 markus Exp $");
#ifdef HAVE_LIBPCRE #ifdef HAVE_LIBPCRE
# include <pcreposix.h> # include <pcreposix.h>
@ -75,18 +75,22 @@ compat_datafellows(const char *version)
{ "^OpenSSH", 0 }, { "^OpenSSH", 0 },
{ "MindTerm", 0 }, { "MindTerm", 0 },
{ "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| { "^2\\.1\\.0", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
SSH_OLD_SESSIONID|SSH_BUG_DEBUG }, SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
SSH_BUG_RSASIGMD5 },
{ "^2\\.1 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| { "^2\\.1 ", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
SSH_OLD_SESSIONID|SSH_BUG_DEBUG }, SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
SSH_BUG_RSASIGMD5 },
{ "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| { "^2\\.0\\.1[3-9]", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
SSH_OLD_SESSIONID|SSH_BUG_DEBUG| SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
SSH_BUG_PKSERVICE|SSH_BUG_X11FWD| SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
SSH_BUG_PKOK }, SSH_BUG_PKOK|SSH_BUG_RSASIGMD5 },
{ "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC| { "^2\\.0\\.", SSH_BUG_SIGBLOB|SSH_BUG_HMAC|
SSH_OLD_SESSIONID|SSH_BUG_DEBUG| SSH_OLD_SESSIONID|SSH_BUG_DEBUG|
SSH_BUG_PKSERVICE|SSH_BUG_X11FWD| SSH_BUG_PKSERVICE|SSH_BUG_X11FWD|
SSH_BUG_PKAUTH|SSH_BUG_PKOK }, SSH_BUG_PKAUTH|SSH_BUG_PKOK|
{ "^2\\.[23]\\.0", SSH_BUG_HMAC }, SSH_BUG_RSASIGMD5 },
{ "^2\\.[23]\\.0", SSH_BUG_HMAC|SSH_BUG_RSASIGMD5 },
{ "^2\\.3\\.", SSH_BUG_RSASIGMD5 },
{ "^2\\.[2-9]\\.", 0 }, { "^2\\.[2-9]\\.", 0 },
{ "^2\\.4$", SSH_OLD_SESSIONID }, /* Van Dyke */ { "^2\\.4$", SSH_OLD_SESSIONID }, /* Van Dyke */
{ "^3\\.0 SecureCRT", SSH_OLD_SESSIONID }, { "^3\\.0 SecureCRT", SSH_OLD_SESSIONID },

3
compat.h
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@ -21,7 +21,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/ */
/* RCSID("$OpenBSD: compat.h,v 1.19 2001/03/23 11:04:06 djm Exp $"); */ /* RCSID("$OpenBSD: compat.h,v 1.20 2001/03/27 10:57:00 markus Exp $"); */
#ifndef COMPAT_H #ifndef COMPAT_H
#define COMPAT_H #define COMPAT_H
@ -44,6 +44,7 @@
#define SSH_BUG_PASSWORDPAD 0x0400 #define SSH_BUG_PASSWORDPAD 0x0400
#define SSH_BUG_SCANNER 0x0800 #define SSH_BUG_SCANNER 0x0800
#define SSH_BUG_BIGENDIANAES 0x1000 #define SSH_BUG_BIGENDIANAES 0x1000
#define SSH_BUG_RSASIGMD5 0x2000
void enable_compat13(void); void enable_compat13(void);
void enable_compat20(void); void enable_compat20(void);

7
ssh-rsa.c
View File

@ -23,7 +23,7 @@
*/ */
#include "includes.h" #include "includes.h"
RCSID("$OpenBSD: ssh-rsa.c,v 1.7 2001/03/27 10:34:08 markus Exp $"); RCSID("$OpenBSD: ssh-rsa.c,v 1.8 2001/03/27 10:57:00 markus Exp $");
#include <openssl/evp.h> #include <openssl/evp.h>
#include <openssl/err.h> #include <openssl/err.h>
@ -34,6 +34,7 @@ RCSID("$OpenBSD: ssh-rsa.c,v 1.7 2001/03/27 10:34:08 markus Exp $");
#include "bufaux.h" #include "bufaux.h"
#include "key.h" #include "key.h"
#include "ssh-rsa.h" #include "ssh-rsa.h"
#include "compat.h"
/* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */ /* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */
int int
@ -53,7 +54,7 @@ ssh_rsa_sign(
error("ssh_rsa_sign: no RSA key"); error("ssh_rsa_sign: no RSA key");
return -1; return -1;
} }
nid = NID_sha1; nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid); error("ssh_rsa_sign: EVP_get_digestbynid %d failed", nid);
return -1; return -1;
@ -147,7 +148,7 @@ ssh_rsa_verify(
error("ssh_rsa_verify: remaining bytes in signature %d", rlen); error("ssh_rsa_verify: remaining bytes in signature %d", rlen);
return -1; return -1;
} }
nid = NID_sha1; nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1;
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { if ((evp_md = EVP_get_digestbynid(nid)) == NULL) {
xfree(sigblob); xfree(sigblob);
error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid); error("ssh_rsa_verify: EVP_get_digestbynid %d failed", nid);