X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs23_clnt.c;h=60a028430d37558b7ab906246ac4c3e33cfc5a25;hp=3cbc64257074b3586b7b68c95091528de88b8762;hb=daddd9a950e491c31f9500d5e570bc7eb96b2823;hpb=566dda07ba16f9d3b9774fd5c8d526d7cc93f179

diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c
index 3cbc642570..60a028430d 100644
--- a/ssl/s23_clnt.c
+++ b/ssl/s23_clnt.c
@@ -55,6 +55,59 @@
  * copied and put under another distribution licence
  * [including the GNU Public Licence.]
  */
+/* ====================================================================
+ * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
 
 #include <stdio.h>
 #include "ssl_locl.h"
@@ -76,6 +129,10 @@ static const SSL_METHOD *ssl23_get_client_method(int ver)
 		return(SSLv3_client_method());
 	else if (ver == TLS1_VERSION)
 		return(TLSv1_client_method());
+	else if (ver == TLS1_1_VERSION)
+		return(TLSv1_1_client_method());
+	else if (ver == TLS1_2_VERSION)
+		return(TLSv1_2_client_method());
 	else
 		return(NULL);
 	}
@@ -88,7 +145,7 @@ IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
 int ssl23_connect(SSL *s)
 	{
 	BUF_MEM *buf=NULL;
-	unsigned long Time=time(NULL);
+	unsigned long Time=(unsigned long)time(NULL);
 	void (*cb)(const SSL *ssl,int type,int val)=NULL;
 	int ret= -1;
 	int new_state,state;
@@ -197,32 +254,121 @@ end:
 	return(ret);
 	}
 
+static int ssl23_no_ssl2_ciphers(SSL *s)
+	{
+	SSL_CIPHER *cipher;
+	STACK_OF(SSL_CIPHER) *ciphers;
+	int i;
+	ciphers = SSL_get_ciphers(s);
+	for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
+		{
+		cipher = sk_SSL_CIPHER_value(ciphers, i);
+		if (cipher->algorithm_ssl == SSL_SSLV2)
+			return 0;
+		}
+	return 1;
+	}
+
+/* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0
+ * on failure, 1 on success. */
+int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
+	{
+		int send_time = 0;
+		if (len < 4)
+			return 0;
+		if (server)
+			send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
+		else
+			send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
+		if (send_time)
+			{
+			unsigned long Time = time(NULL);
+			unsigned char *p = result;
+			l2n(Time, p);
+			return RAND_pseudo_bytes(p, len-4);
+			}
+		else
+			return RAND_pseudo_bytes(result, len);
+	}
 
 static int ssl23_client_hello(SSL *s)
 	{
 	unsigned char *buf;
 	unsigned char *p,*d;
-	int i,j,ch_len;
-	unsigned long Time,l;
+	int i,ch_len;
+	unsigned long l;
 	int ssl2_compat;
 	int version = 0, version_major, version_minor;
+	int al = 0;
+#ifndef OPENSSL_NO_COMP
+	int j;
 	SSL_COMP *comp;
+#endif
 	int ret;
+	unsigned long mask, options = s->options;
+
+	ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1;
+
+	if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
+		ssl2_compat = 0;
+
+	/*
+	 * SSL_OP_NO_X disables all protocols above X *if* there are
+	 * some protocols below X enabled. This is required in order
+	 * to maintain "version capability" vector contiguous. So
+	 * that if application wants to disable TLS1.0 in favour of
+	 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
+	 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
+	 */
+	mask =	SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
+#if !defined(OPENSSL_NO_SSL3)
+		|SSL_OP_NO_SSLv3
+#endif
+#if !defined(OPENSSL_NO_SSL2)
+		|(ssl2_compat?SSL_OP_NO_SSLv2:0)
+#endif
+		;
+#if !defined(OPENSSL_NO_TLS1_2_CLIENT)
+	version = TLS1_2_VERSION;
 
-	ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
-
-	if (!(s->options & SSL_OP_NO_TLSv1))
-		{
+	if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
+		version = TLS1_1_VERSION;
+#else
+	version = TLS1_1_VERSION;
+#endif
+	mask &= ~SSL_OP_NO_TLSv1_1;
+	if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
 		version = TLS1_VERSION;
-		}
-	else if (!(s->options & SSL_OP_NO_SSLv3))
-		{
+	mask &= ~SSL_OP_NO_TLSv1;
+#if !defined(OPENSSL_NO_SSL3)
+	if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
 		version = SSL3_VERSION;
-		}
-	else if (!(s->options & SSL_OP_NO_SSLv2))
-		{
+	mask &= ~SSL_OP_NO_SSLv3;
+#endif
+#if !defined(OPENSSL_NO_SSL2)
+	if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask)
 		version = SSL2_VERSION;
+#endif
+
+#ifndef OPENSSL_NO_TLSEXT
+	if (version != SSL2_VERSION)
+		{
+		/* have to disable SSL 2.0 compatibility if we need TLS extensions */
+
+		if (s->tlsext_hostname != NULL)
+			ssl2_compat = 0;
+		if (s->tlsext_status_type != -1)
+			ssl2_compat = 0;
+#ifdef TLSEXT_TYPE_opaque_prf_input
+		if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL)
+			ssl2_compat = 0;
+#endif
+		if (s->ctx->custom_cli_ext_records_count != 0)
+			ssl2_compat = 0;
+		if (s->ctx->cli_supp_data_records_count != 0)
+			ssl2_compat = 0;
 		}
+#endif
 
 	buf=(unsigned char *)s->init_buf->data;
 	if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
@@ -236,16 +382,38 @@ static int ssl23_client_hello(SSL *s)
 #endif
 
 		p=s->s3->client_random;
-		Time=time(NULL);			/* Time */
-		l2n(Time,p);
-		if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
+		if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
 			return -1;
 
-		if (version == TLS1_VERSION)
+		if (version == TLS1_2_VERSION)
+			{
+			version_major = TLS1_2_VERSION_MAJOR;
+			version_minor = TLS1_2_VERSION_MINOR;
+			}
+		else if (tls1_suiteb(s))
+			{
+			SSLerr(SSL_F_SSL23_CLIENT_HELLO,
+					SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
+			return -1;
+			}
+		else if (version == TLS1_1_VERSION)
+			{
+			version_major = TLS1_1_VERSION_MAJOR;
+			version_minor = TLS1_1_VERSION_MINOR;
+			}
+		else if (version == TLS1_VERSION)
 			{
 			version_major = TLS1_VERSION_MAJOR;
 			version_minor = TLS1_VERSION_MINOR;
 			}
+#ifdef OPENSSL_FIPS
+		else if(FIPS_mode())
+			{
+			SSLerr(SSL_F_SSL23_CLIENT_HELLO,
+					SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
+			return -1;
+			}
+#endif
 		else if (version == SSL3_VERSION)
 			{
 			version_major = SSL3_VERSION_MAJOR;
@@ -299,6 +467,10 @@ static int ssl23_client_hello(SSL *s)
 				ch_len=SSL2_MAX_CHALLENGE_LENGTH;
 
 			/* write out sslv2 challenge */
+			/* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
+			   because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
+			   or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
+			   check in for futurproofing */
 			if (SSL3_RANDOM_SIZE < ch_len)
 				i=SSL3_RANDOM_SIZE;
 			else
@@ -345,10 +517,22 @@ static int ssl23_client_hello(SSL *s)
 				SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
 				return -1;
 				}
+#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
+			/* Some servers hang if client hello > 256 bytes
+			 * as hack workaround chop number of supported ciphers
+			 * to keep it well below this if we use TLS v1.2
+			 */
+			if (TLS1_get_version(s) >= TLS1_2_VERSION
+				&& i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
+				i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
+#endif
 			s2n(i,p);
 			p+=i;
 
 			/* COMPRESSION */
+#ifdef OPENSSL_NO_COMP
+			*(p++)=1;
+#else
 			if ((s->options & SSL_OP_NO_COMPRESSION)
 						|| !s->ctx->comp_methods)
 				j=0;
@@ -360,10 +544,25 @@ static int ssl23_client_hello(SSL *s)
 				comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
 				*(p++)=comp->id;
 				}
+#endif
 			*(p++)=0; /* Add the NULL method */
+
+#ifndef OPENSSL_NO_TLSEXT
+			/* TLS extensions*/
+			if (ssl_prepare_clienthello_tlsext(s) <= 0)
+				{
+				SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
+				return -1;
+				}
+			if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
+				{
+				ssl3_send_alert(s,SSL3_AL_FATAL,al);
+				SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
+				return -1;
+				}
+#endif
 			
 			l = p-d;
-			*p = 42;
 
 			/* fill in 4-byte handshake header */
 			d=&(buf[5]);
@@ -382,8 +581,13 @@ static int ssl23_client_hello(SSL *s)
 			d=buf;
 			*(d++) = SSL3_RT_HANDSHAKE;
 			*(d++) = version_major;
-			*(d++) = version_minor; /* arguably we should send the *lowest* suported version here
-			                         * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
+			/* Some servers hang if we use long client hellos
+			 * and a record number > TLS 1.0.
+			 */
+			if (TLS1_get_client_version(s) > TLS1_VERSION)
+				*(d++) = 1;
+			else
+				*(d++) = version_minor;
 			s2n((int)l,d);
 
 			/* number of bytes to write */
@@ -407,7 +611,10 @@ static int ssl23_client_hello(SSL *s)
 		if (ssl2_compat)
 			s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
 		else
+			{
+			s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg);
 			s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
+			}
 		}
 
 	return ret;
@@ -458,6 +665,10 @@ static int ssl23_get_server_hello(SSL *s)
 			ch_len=SSL2_MAX_CHALLENGE_LENGTH;
 
 		/* write out sslv2 challenge */
+		/* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
+		   it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
+		   SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
+		   futurproofing */
 		i=(SSL3_RANDOM_SIZE < ch_len)
 			?SSL3_RANDOM_SIZE:ch_len;
 		s->s2->challenge_length=i;
@@ -478,7 +689,7 @@ static int ssl23_get_server_hello(SSL *s)
 			/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
 			s->s2->ssl2_rollback=1;
 
-		/* setup the 5 bytes we have read so we get them from
+		/* setup the 7 bytes we have read so we get them from
 		 * the sslv2 buffer */
 		s->rstate=SSL_ST_READ_HEADER;
 		s->packet_length=n;
@@ -494,31 +705,24 @@ static int ssl23_get_server_hello(SSL *s)
 		s->handshake_func=s->method->ssl_connect;
 #endif
 		}
-	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
-		 (p[1] == SSL3_VERSION_MAJOR) &&
-		 ((p[2] == SSL3_VERSION_MINOR) ||
-		  (p[2] == TLS1_VERSION_MINOR)) &&
-		 (p[5] == SSL3_MT_SERVER_HELLO))
+	else if (p[1] == SSL3_VERSION_MAJOR &&
+	         p[2] <= TLS1_2_VERSION_MINOR &&
+	         ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
+	          (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
 		{
-		/* we have sslv3 or tls1 */
-
-		if (!ssl_init_wbio_buffer(s,1)) goto err;
-
-		/* we are in this state */
-		s->state=SSL3_ST_CR_SRVR_HELLO_A;
-
-		/* put the 5 bytes we have read into the input buffer
-		 * for SSLv3 */
-		s->rstate=SSL_ST_READ_HEADER;
-		s->packet_length=n;
-		s->packet= &(s->s3->rbuf.buf[0]);
-		memcpy(s->packet,buf,n);
-		s->s3->rbuf.left=n;
-		s->s3->rbuf.offset=0;
+		/* we have sslv3 or tls1 (server hello or alert) */
 
 		if ((p[2] == SSL3_VERSION_MINOR) &&
 			!(s->options & SSL_OP_NO_SSLv3))
 			{
+#ifdef OPENSSL_FIPS
+			if(FIPS_mode())
+				{
+				SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
+					SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
+				goto err;
+				}
+#endif
 			s->version=SSL3_VERSION;
 			s->method=SSLv3_client_method();
 			}
@@ -528,40 +732,72 @@ static int ssl23_get_server_hello(SSL *s)
 			s->version=TLS1_VERSION;
 			s->method=TLSv1_client_method();
 			}
+		else if ((p[2] == TLS1_1_VERSION_MINOR) &&
+			!(s->options & SSL_OP_NO_TLSv1_1))
+			{
+			s->version=TLS1_1_VERSION;
+			s->method=TLSv1_1_client_method();
+			}
+		else if ((p[2] == TLS1_2_VERSION_MINOR) &&
+			!(s->options & SSL_OP_NO_TLSv1_2))
+			{
+			s->version=TLS1_2_VERSION;
+			s->method=TLSv1_2_client_method();
+			}
 		else
 			{
 			SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
 			goto err;
 			}
-			
-		s->handshake_func=s->method->ssl_connect;
-		}
-	else if ((p[0] == SSL3_RT_ALERT) &&
-		 (p[1] == SSL3_VERSION_MAJOR) &&
-		 ((p[2] == SSL3_VERSION_MINOR) ||
-		  (p[2] == TLS1_VERSION_MINOR)) &&
-		 (p[3] == 0) &&
-		 (p[4] == 2))
-		{
-		void (*cb)(const SSL *ssl,int type,int val)=NULL;
-		int j;
-
-		/* An alert */
-		if (s->info_callback != NULL)
-			cb=s->info_callback;
-		else if (s->ctx->info_callback != NULL)
-			cb=s->ctx->info_callback;
- 
-		i=p[5];
-		if (cb != NULL)
+
+		if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
 			{
-			j=(i<<8)|p[6];
-			cb(s,SSL_CB_READ_ALERT,j);
+			/* fatal alert */
+
+			void (*cb)(const SSL *ssl,int type,int val)=NULL;
+			int j;
+
+			if (s->info_callback != NULL)
+				cb=s->info_callback;
+			else if (s->ctx->info_callback != NULL)
+				cb=s->ctx->info_callback;
+ 
+			i=p[5];
+			if (cb != NULL)
+				{
+				j=(i<<8)|p[6];
+				cb(s,SSL_CB_READ_ALERT,j);
+				}
+			
+			if (s->msg_callback)
+				{
+				s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg);
+				s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
+				}
+
+			s->rwstate=SSL_NOTHING;
+			SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
+			goto err;
 			}
 
-		s->rwstate=SSL_NOTHING;
-		SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
-		goto err;
+		if (!ssl_init_wbio_buffer(s,1)) goto err;
+
+		/* we are in this state */
+		s->state=SSL3_ST_CR_SRVR_HELLO_A;
+
+		/* put the 7 bytes we have read into the input buffer
+		 * for SSLv3 */
+		s->rstate=SSL_ST_READ_HEADER;
+		s->packet_length=n;
+		if (s->s3->rbuf.buf == NULL)
+			if (!ssl3_setup_read_buffer(s))
+				goto err;
+		s->packet= &(s->s3->rbuf.buf[0]);
+		memcpy(s->packet,buf,n);
+		s->s3->rbuf.left=n;
+		s->s3->rbuf.offset=0;
+
+		s->handshake_func=s->method->ssl_connect;
 		}
 	else
 		{
@@ -575,9 +811,7 @@ static int ssl23_get_server_hello(SSL *s)
 	if (!ssl_get_new_session(s,0))
 		goto err;
 
-	s->first_packet=1;
 	return(SSL_connect(s));
 err:
 	return(-1);
 	}
-