Option to set current cert to server certificate.
[openssl.git] / ssl / s23_clnt.c
index b21308b..60a0284 100644 (file)
  * 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"
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 
-static SSL_METHOD *ssl23_get_client_method(int ver);
+static const SSL_METHOD *ssl23_get_client_method(int ver);
 static int ssl23_client_hello(SSL *s);
 static int ssl23_get_server_hello(SSL *s);
-static SSL_METHOD *ssl23_get_client_method(int ver)
+static const SSL_METHOD *ssl23_get_client_method(int ver)
        {
 #ifndef OPENSSL_NO_SSL2
        if (ver == SSL2_VERSION)
@@ -76,37 +129,23 @@ static 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);
        }
 
-SSL_METHOD *SSLv23_client_method(void)
-       {
-       static int init=1;
-       static SSL_METHOD SSLv23_client_data;
-
-       if (init)
-               {
-               CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
-
-               if (init)
-                       {
-                       memcpy((char *)&SSLv23_client_data,
-                               (char *)sslv23_base_method(),sizeof(SSL_METHOD));
-                       SSLv23_client_data.ssl_connect=ssl23_connect;
-                       SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
-                       init=0;
-                       }
-
-               CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
-               }
-       return(&SSLv23_client_data);
-       }
+IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
+                       ssl_undefined_function,
+                       ssl23_connect,
+                       ssl23_get_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;
@@ -215,32 +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)
@@ -254,16 +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;
@@ -317,6 +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
@@ -363,11 +517,24 @@ 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 */
-                       if (s->ctx->comp_methods == NULL)
+#ifdef OPENSSL_NO_COMP
+                       *(p++)=1;
+#else
+                       if ((s->options & SSL_OP_NO_COMPRESSION)
+                                               || !s->ctx->comp_methods)
                                j=0;
                        else
                                j=sk_SSL_COMP_num(s->ctx->comp_methods);
@@ -377,10 +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]);
@@ -399,8 +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 */
@@ -424,7 +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;
@@ -475,6 +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;
@@ -495,7 +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;
@@ -511,31 +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();
                        }
@@ -545,40 +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
                {
@@ -592,9 +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);
        }
-