- markus@cvs.openbsd.org 2014/01/27 19:18:54

     [auth-rsa.c cipher.c ssh-agent.c sshconnect1.c sshd.c]
     replace openssl MD5 with our ssh_digest_*; ok djm@

6 files changed, 58 insertions, 43 deletions

diff --git a/ChangeLog b/ChangeLog
index 8b619de7..2606a97f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,9 @@
      [Makefile.in digest.c digest.h hostfile.c kex.h mac.c hmac.c hmac.h]
      replace openssl HMAC with an implementation based on our ssh_digest_*
      ok and feedback djm@
+   - markus@cvs.openbsd.org 2014/01/27 19:18:54
+     [auth-rsa.c cipher.c ssh-agent.c sshconnect1.c sshd.c]
+     replace openssl MD5 with our ssh_digest_*; ok djm@
 
 20140131
  - (djm) [sandbox-seccomp-filter.c sandbox-systrace.c] Allow shutdown(2)
diff --git a/auth-rsa.c b/auth-rsa.c
index 545aa496..5dad6c3d 100644
--- a/auth-rsa.c
+++ b/auth-rsa.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth-rsa.c,v 1.85 2013/07/12 00:19:58 djm Exp $ */
+/* $OpenBSD: auth-rsa.c,v 1.86 2014/01/27 19:18:54 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -20,7 +20,6 @@
 #include <sys/stat.h>
 
 #include <openssl/rsa.h>
-#include <openssl/md5.h>
 
 #include <pwd.h>
 #include <stdio.h>
@@ -48,6 +47,8 @@
 #include "ssh.h"
 #include "misc.h"
 
+#include "digest.h"
+
 /* import */
 extern ServerOptions options;
 
@@ -91,12 +92,13 @@ int
 auth_rsa_verify_response(Key *key, BIGNUM *challenge, u_char response[16])
 {
 	u_char buf[32], mdbuf[16];
-	MD5_CTX md;
+	struct ssh_digest_ctx *md;
 	int len;
 
 	/* don't allow short keys */
 	if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) {
-		error("auth_rsa_verify_response: RSA modulus too small: %d < minimum %d bits",
+		error("%s: RSA modulus too small: %d < minimum %d bits",
+		    __func__,
 		    BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE);
 		return (0);
 	}
@@ -104,13 +106,15 @@ auth_rsa_verify_response(Key *key, BIGNUM *challenge, u_char response[16])
 	/* The response is MD5 of decrypted challenge plus session id. */
 	len = BN_num_bytes(challenge);
 	if (len <= 0 || len > 32)
-		fatal("auth_rsa_verify_response: bad challenge length %d", len);
+		fatal("%s: bad challenge length %d", __func__, len);
 	memset(buf, 0, 32);
 	BN_bn2bin(challenge, buf + 32 - len);
-	MD5_Init(&md);
-	MD5_Update(&md, buf, 32);
-	MD5_Update(&md, session_id, 16);
-	MD5_Final(mdbuf, &md);
+	if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL ||
+	    ssh_digest_update(md, buf, 32) < 0 ||
+	    ssh_digest_update(md, session_id, 16) < 0 ||
+	    ssh_digest_final(md, mdbuf, sizeof(mdbuf)) < 0)
+		fatal("%s: md5 failed", __func__);
+	ssh_digest_free(md);
 
 	/* Verify that the response is the original challenge. */
 	if (timingsafe_bcmp(response, mdbuf, 16) != 0) {
diff --git a/cipher.c b/cipher.c
index 2476e653..98961be1 100644
--- a/cipher.c
+++ b/cipher.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cipher.c,v 1.94 2014/01/25 10:12:50 dtucker Exp $ */
+/* $OpenBSD: cipher.c,v 1.95 2014/01/27 19:18:54 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -39,8 +39,6 @@
 
 #include <sys/types.h>
 
-#include <openssl/md5.h>
-
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -49,6 +47,8 @@
 #include "log.h"
 #include "misc.h"
 #include "cipher.h"
+#include "buffer.h"
+#include "digest.h"
 
 /* compatibility with old or broken OpenSSL versions */
 #include "openbsd-compat/openssl-compat.h"
@@ -436,17 +436,15 @@ void
 cipher_set_key_string(CipherContext *cc, const Cipher *cipher,
     const char *passphrase, int do_encrypt)
 {
-	MD5_CTX md;
 	u_char digest[16];
 
-	MD5_Init(&md);
-	MD5_Update(&md, (const u_char *)passphrase, strlen(passphrase));
-	MD5_Final(digest, &md);
+	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);
 
 	memset(digest, 0, sizeof(digest));
-	memset(&md, 0, sizeof(md));
 }
 
 /*
diff --git a/ssh-agent.c b/ssh-agent.c
index 95117e07..256dff50 100644
--- a/ssh-agent.c
+++ b/ssh-agent.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-agent.c,v 1.181 2013/12/19 01:19:41 djm Exp $ */
+/* $OpenBSD: ssh-agent.c,v 1.182 2014/01/27 19:18:54 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -50,7 +50,6 @@
 #include "openbsd-compat/sys-queue.h"
 
 #include <openssl/evp.h>
-#include <openssl/md5.h>
 #include "openbsd-compat/openssl-compat.h"
 
 #include <errno.h>
@@ -75,6 +74,7 @@
 #include "compat.h"
 #include "log.h"
 #include "misc.h"
+#include "digest.h"
 
 #ifdef ENABLE_PKCS11
 #include "ssh-pkcs11.h"
@@ -248,7 +248,7 @@ process_authentication_challenge1(SocketEntry *e)
 	Identity *id;
 	int i, len;
 	Buffer msg;
-	MD5_CTX md;
+	struct ssh_digest_ctx *md;
 	Key *key;
 
 	buffer_init(&msg);
@@ -284,10 +284,12 @@ process_authentication_challenge1(SocketEntry *e)
 		}
 		memset(buf, 0, 32);
 		BN_bn2bin(challenge, buf + 32 - len);
-		MD5_Init(&md);
-		MD5_Update(&md, buf, 32);
-		MD5_Update(&md, session_id, 16);
-		MD5_Final(mdbuf, &md);
+		if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL ||
+		    ssh_digest_update(md, buf, 32) < 0 ||
+		    ssh_digest_update(md, session_id, 16) < 0 ||
+		    ssh_digest_final(md, mdbuf, sizeof(mdbuf)) < 0)
+			fatal("%s: md5 failed", __func__);
+		ssh_digest_free(md);
 
 		/* Send the response. */
 		buffer_put_char(&msg, SSH_AGENT_RSA_RESPONSE);
diff --git a/sshconnect1.c b/sshconnect1.c
index 7bd6cb01..57713d24 100644
--- a/sshconnect1.c
+++ b/sshconnect1.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshconnect1.c,v 1.72 2013/09/02 22:00:34 deraadt Exp $ */
+/* $OpenBSD: sshconnect1.c,v 1.73 2014/01/27 19:18:54 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -19,7 +19,6 @@
 #include <sys/socket.h>
 
 #include <openssl/bn.h>
-#include <openssl/md5.h>
 
 #include <stdarg.h>
 #include <stdio.h>
@@ -47,6 +46,7 @@
 #include "canohost.h"
 #include "hostfile.h"
 #include "auth.h"
+#include "digest.h"
 
 /* Session id for the current session. */
 u_char session_id[16];
@@ -161,7 +161,7 @@ static void
 respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv)
 {
 	u_char buf[32], response[16];
-	MD5_CTX md;
+	struct ssh_digest_ctx *md;
 	int i, len;
 
 	/* Decrypt the challenge using the private key. */
@@ -179,10 +179,12 @@ respond_to_rsa_challenge(BIGNUM * challenge, RSA * prv)
 
 	memset(buf, 0, sizeof(buf));
 	BN_bn2bin(challenge, buf + sizeof(buf) - len);
-	MD5_Init(&md);
-	MD5_Update(&md, buf, 32);
-	MD5_Update(&md, session_id, 16);
-	MD5_Final(response, &md);
+	if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL ||
+	    ssh_digest_update(md, buf, 32) < 0 ||
+	    ssh_digest_update(md, session_id, 16) < 0 ||
+	    ssh_digest_final(md, response, sizeof(response)) < 0)
+		fatal("%s: md5 failed", __func__);
+	ssh_digest_free(md);
 
 	debug("Sending response to host key RSA challenge.");
 
diff --git a/sshd.c b/sshd.c
index 25380c91..25583576 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.414 2014/01/09 23:26:48 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.415 2014/01/27 19:18:54 markus Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -74,7 +74,6 @@
 
 #include <openssl/dh.h>
 #include <openssl/bn.h>
-#include <openssl/md5.h>
 #include <openssl/rand.h>
 #include "openbsd-compat/openssl-compat.h"
 
@@ -96,6 +95,7 @@
 #include "uidswap.h"
 #include "compat.h"
 #include "cipher.h"
+#include "digest.h"
 #include "key.h"
 #include "kex.h"
 #include "dh.h"
@@ -2360,19 +2360,25 @@ do_ssh1_kex(void)
 	if (rsafail) {
 		int bytes = BN_num_bytes(session_key_int);
 		u_char *buf = xmalloc(bytes);
-		MD5_CTX md;
+		struct ssh_digest_ctx *md;
 
 		logit("do_connection: generating a fake encryption key");
 		BN_bn2bin(session_key_int, buf);
-		MD5_Init(&md);
-		MD5_Update(&md, buf, bytes);
-		MD5_Update(&md, sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH);
-		MD5_Final(session_key, &md);
-		MD5_Init(&md);
-		MD5_Update(&md, session_key, 16);
-		MD5_Update(&md, buf, bytes);
-		MD5_Update(&md, sensitive_data.ssh1_cookie, SSH_SESSION_KEY_LENGTH);
-		MD5_Final(session_key + 16, &md);
+		if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL ||
+		    ssh_digest_update(md, buf, bytes) < 0 ||
+		    ssh_digest_update(md, sensitive_data.ssh1_cookie,
+		    SSH_SESSION_KEY_LENGTH) < 0 ||
+		    ssh_digest_final(md, session_key, sizeof(session_key)) < 0)
+			fatal("%s: md5 failed", __func__);
+		ssh_digest_free(md);
+		if ((md = ssh_digest_start(SSH_DIGEST_MD5)) == NULL ||
+		    ssh_digest_update(md, session_key, 16) < 0 ||
+		    ssh_digest_update(md, sensitive_data.ssh1_cookie,
+		    SSH_SESSION_KEY_LENGTH) < 0 ||
+		    ssh_digest_final(md, session_key + 16,
+		    sizeof(session_key) - 16) < 0)
+			fatal("%s: md5 failed", __func__);
+		ssh_digest_free(md);
 		memset(buf, 0, bytes);
 		free(buf);
 		for (i = 0; i < 16; i++)