Set security level to zero is ssltest
[openssl.git] / ssl / s23_clnt.c
index f49a95b..dad7e3a 100644 (file)
@@ -259,55 +259,102 @@ static int ssl23_no_ssl2_ciphers(SSL *s)
        SSL_CIPHER *cipher;
        STACK_OF(SSL_CIPHER) *ciphers;
        int i;
+       ssl_set_client_disabled(s);
        ciphers = SSL_get_ciphers(s);
        for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
                {
                cipher = sk_SSL_CIPHER_value(ciphers, i);
+               if (ssl_cipher_disabled(s, cipher, SSL_SECOP_CIPHER_SUPPORTED))
+                       continue;
                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,ch_len;
-       unsigned long Time,l;
+       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 = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
+       ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1;
 
+       if (ssl2_compat && !ssl_security(s, SSL_SECOP_SSL2_COMPAT, 0, 0, NULL))
+               ssl2_compat = 0;
        if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
                ssl2_compat = 0;
 
-       if (!(s->options & SSL_OP_NO_TLSv1_2))
-               {
-               version = TLS1_2_VERSION;
-               }
-       else if (!(s->options & SSL_OP_NO_TLSv1_1))
-               {
+       /*
+        * 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;
+
+       if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
                version = TLS1_1_VERSION;
-               }
-       else if (!(s->options & SSL_OP_NO_TLSv1))
-               {
+#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)
                {
@@ -321,6 +368,10 @@ static int ssl23_client_hello(SSL *s)
                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
 
@@ -336,9 +387,7 @@ static int ssl23_client_hello(SSL *s)
 #endif
 
                p=s->s3->client_random;
-               Time=(unsigned long)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_2_VERSION)
@@ -346,6 +395,12 @@ static int ssl23_client_hello(SSL *s)
                        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;
@@ -356,6 +411,14 @@ static int ssl23_client_hello(SSL *s)
                        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;
@@ -459,6 +522,15 @@ 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;
 
@@ -466,8 +538,7 @@ static int ssl23_client_hello(SSL *s)
 #ifdef OPENSSL_NO_COMP
                        *(p++)=1;
 #else
-                       if ((s->options & SSL_OP_NO_COMPRESSION)
-                                               || !s->ctx->comp_methods)
+                       if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
                                j=0;
                        else
                                j=sk_SSL_COMP_num(s->ctx->comp_methods);
@@ -487,8 +558,9 @@ static int ssl23_client_hello(SSL *s)
                                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)) == NULL)
+                       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;
                                }
@@ -513,8 +585,13 @@ 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 */
@@ -538,7 +615,10 @@ 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;
@@ -639,6 +719,14 @@ static int ssl23_get_server_hello(SSL *s)
                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();
                        }
@@ -666,6 +754,12 @@ static int ssl23_get_server_hello(SSL *s)
                        goto err;
                        }
 
+               if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
+                       {
+                       SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW);
+                       goto err;
+                       }
+
                if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
                        {
                        /* fatal alert */
@@ -686,7 +780,10 @@ static int ssl23_get_server_hello(SSL *s)
                                }
                        
                        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]);