diff options
Diffstat (limited to 'ssl/s23_clnt.c')
| -rw-r--r-- | ssl/s23_clnt.c | 1257 |
1 files changed, 623 insertions, 634 deletions
diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c index 86ab3de..3766567 100644 --- a/ssl/s23_clnt.c +++ b/ssl/s23_clnt.c @@ -5,21 +5,21 @@ * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. - * + * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * + * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. - * + * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: @@ -34,10 +34,10 @@ * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from + * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * + * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE @@ -49,7 +49,7 @@ * 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. - * + * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence @@ -63,7 +63,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -120,689 +120,678 @@ 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 const SSL_METHOD *ssl23_get_client_method(int ver) - { +{ #ifndef OPENSSL_NO_SSL2 - if (ver == SSL2_VERSION) - return(SSLv2_client_method()); + if (ver == SSL2_VERSION) + return (SSLv2_client_method()); #endif #ifndef OPENSSL_NO_SSL3 - if (ver == SSL3_VERSION) - return(SSLv3_client_method()); + if (ver == SSL3_VERSION) + return (SSLv3_client_method()); #endif - 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); - } + 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); +} IMPLEMENT_ssl23_meth_func(SSLv23_client_method, - ssl_undefined_function, - ssl23_connect, - ssl23_get_client_method) + ssl_undefined_function, + ssl23_connect, ssl23_get_client_method) int ssl23_connect(SSL *s) - { - BUF_MEM *buf=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; - - RAND_add(&Time,sizeof(Time),0); - ERR_clear_error(); - clear_sys_error(); - - if (s->info_callback != NULL) - cb=s->info_callback; - else if (s->ctx->info_callback != NULL) - cb=s->ctx->info_callback; - - s->in_handshake++; - if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); - - for (;;) - { - state=s->state; - - switch(s->state) - { - case SSL_ST_BEFORE: - case SSL_ST_CONNECT: - case SSL_ST_BEFORE|SSL_ST_CONNECT: - case SSL_ST_OK|SSL_ST_CONNECT: - - if (s->session != NULL) - { - SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE); - ret= -1; - goto end; - } - s->server=0; - if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); - - /* s->version=TLS1_VERSION; */ - s->type=SSL_ST_CONNECT; - - if (s->init_buf == NULL) - { - if ((buf=BUF_MEM_new()) == NULL) - { - ret= -1; - goto end; - } - if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) - { - ret= -1; - goto end; - } - s->init_buf=buf; - buf=NULL; - } - - if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } - - ssl3_init_finished_mac(s); - - s->state=SSL23_ST_CW_CLNT_HELLO_A; - s->ctx->stats.sess_connect++; - s->init_num=0; - break; - - case SSL23_ST_CW_CLNT_HELLO_A: - case SSL23_ST_CW_CLNT_HELLO_B: - - s->shutdown=0; - ret=ssl23_client_hello(s); - if (ret <= 0) goto end; - s->state=SSL23_ST_CR_SRVR_HELLO_A; - s->init_num=0; - - break; - - case SSL23_ST_CR_SRVR_HELLO_A: - case SSL23_ST_CR_SRVR_HELLO_B: - ret=ssl23_get_server_hello(s); - if (ret >= 0) cb=NULL; - goto end; - /* break; */ - - default: - SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE); - ret= -1; - goto end; - /* break; */ - } - - if (s->debug) { (void)BIO_flush(s->wbio); } - - if ((cb != NULL) && (s->state != state)) - { - new_state=s->state; - s->state=state; - cb(s,SSL_CB_CONNECT_LOOP,1); - s->state=new_state; - } - } -end: - s->in_handshake--; - if (buf != NULL) - BUF_MEM_free(buf); - if (cb != NULL) - cb(s,SSL_CB_CONNECT_EXIT,ret); - return(ret); - } +{ + BUF_MEM *buf = 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; + + RAND_add(&Time, sizeof(Time), 0); + ERR_clear_error(); + clear_sys_error(); + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + s->in_handshake++; + if (!SSL_in_init(s) || SSL_in_before(s)) + SSL_clear(s); + + for (;;) { + state = s->state; + + switch (s->state) { + case SSL_ST_BEFORE: + case SSL_ST_CONNECT: + case SSL_ST_BEFORE | SSL_ST_CONNECT: + case SSL_ST_OK | SSL_ST_CONNECT: + + if (s->session != NULL) { + SSLerr(SSL_F_SSL23_CONNECT, + SSL_R_SSL23_DOING_SESSION_ID_REUSE); + ret = -1; + goto end; + } + s->server = 0; + if (cb != NULL) + cb(s, SSL_CB_HANDSHAKE_START, 1); + + /* s->version=TLS1_VERSION; */ + s->type = SSL_ST_CONNECT; + + if (s->init_buf == NULL) { + if ((buf = BUF_MEM_new()) == NULL) { + ret = -1; + goto end; + } + if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { + ret = -1; + goto end; + } + s->init_buf = buf; + buf = NULL; + } + + if (!ssl3_setup_buffers(s)) { + ret = -1; + goto end; + } + + ssl3_init_finished_mac(s); + + s->state = SSL23_ST_CW_CLNT_HELLO_A; + s->ctx->stats.sess_connect++; + s->init_num = 0; + break; + + case SSL23_ST_CW_CLNT_HELLO_A: + case SSL23_ST_CW_CLNT_HELLO_B: + + s->shutdown = 0; + ret = ssl23_client_hello(s); + if (ret <= 0) + goto end; + s->state = SSL23_ST_CR_SRVR_HELLO_A; + s->init_num = 0; + + break; + + case SSL23_ST_CR_SRVR_HELLO_A: + case SSL23_ST_CR_SRVR_HELLO_B: + ret = ssl23_get_server_hello(s); + if (ret >= 0) + cb = NULL; + goto end; + /* break; */ + + default: + SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE); + ret = -1; + goto end; + /* break; */ + } + + if (s->debug) { + (void)BIO_flush(s->wbio); + } + + if ((cb != NULL) && (s->state != state)) { + new_state = s->state; + s->state = state; + cb(s, SSL_CB_CONNECT_LOOP, 1); + s->state = new_state; + } + } + end: + s->in_handshake--; + if (buf != NULL) + BUF_MEM_free(buf); + if (cb != NULL) + cb(s, SSL_CB_CONNECT_EXIT, ret); + 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. */ +{ + 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 = (unsigned long)time(NULL); - unsigned char *p = result; - l2n(Time, p); - return RAND_pseudo_bytes(p, len-4); - } - else - return RAND_pseudo_bytes(result, 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 = (unsigned long)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 l; - int ssl2_compat; - int version = 0, version_major, version_minor; +{ + unsigned char *buf; + unsigned char *p, *d; + int i, ch_len; + unsigned long l; + int ssl2_compat; + int version = 0, version_major, version_minor; #ifndef OPENSSL_NO_COMP - int j; - SSL_COMP *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 + 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 + | SSL_OP_NO_SSLv3 #endif #if !defined(OPENSSL_NO_SSL2) - |(ssl2_compat?SSL_OP_NO_SSLv2:0) + | (ssl2_compat ? SSL_OP_NO_SSLv2 : 0) #endif - ; + ; #if !defined(OPENSSL_NO_TLS1_2_CLIENT) - version = TLS1_2_VERSION; + version = TLS1_2_VERSION; - if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) - version = TLS1_1_VERSION; + if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) + version = TLS1_1_VERSION; #else - version = TLS1_1_VERSION; + version = TLS1_1_VERSION; #endif - mask &= ~SSL_OP_NO_TLSv1_1; - if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) - version = TLS1_VERSION; - mask &= ~SSL_OP_NO_TLSv1; + mask &= ~SSL_OP_NO_TLSv1_1; + if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) + version = TLS1_VERSION; + mask &= ~SSL_OP_NO_TLSv1; #if !defined(OPENSSL_NO_SSL3) - if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) - version = SSL3_VERSION; - mask &= ~SSL_OP_NO_SSLv3; + if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) + version = SSL3_VERSION; + mask &= ~SSL_OP_NO_SSLv3; #endif #if !defined(OPENSSL_NO_SSL2) - if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask) - version = SSL2_VERSION; + 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 (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 + } #endif - buf=(unsigned char *)s->init_buf->data; - if (s->state == SSL23_ST_CW_CLNT_HELLO_A) - { + buf = (unsigned char *)s->init_buf->data; + if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { #if 0 - /* don't reuse session-id's */ - if (!ssl_get_new_session(s,0)) - { - return(-1); - } + /* don't reuse session-id's */ + if (!ssl_get_new_session(s, 0)) { + return (-1); + } #endif - p=s->s3->client_random; - if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) - return -1; - - if (version == TLS1_2_VERSION) - { - version_major = TLS1_2_VERSION_MAJOR; - version_minor = TLS1_2_VERSION_MINOR; - } - 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; - } + p = s->s3->client_random; + if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) + return -1; + + if (version == TLS1_2_VERSION) { + version_major = TLS1_2_VERSION_MAJOR; + version_minor = TLS1_2_VERSION_MINOR; + } 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; - } + 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; - version_minor = SSL3_VERSION_MINOR; - } - else if (version == SSL2_VERSION) - { - version_major = SSL2_VERSION_MAJOR; - version_minor = SSL2_VERSION_MINOR; - } - else - { - SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE); - return(-1); - } - - s->client_version = version; - - if (ssl2_compat) - { - /* create SSL 2.0 compatible Client Hello */ - - /* two byte record header will be written last */ - d = &(buf[2]); - p = d + 9; /* leave space for message type, version, individual length fields */ - - *(d++) = SSL2_MT_CLIENT_HELLO; - *(d++) = version_major; - *(d++) = version_minor; - - /* Ciphers supported */ - i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0); - if (i == 0) - { - /* no ciphers */ - SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); - return -1; - } - s2n(i,d); - p+=i; - - /* put in the session-id length (zero since there is no reuse) */ + else if (version == SSL3_VERSION) { + version_major = SSL3_VERSION_MAJOR; + version_minor = SSL3_VERSION_MINOR; + } else if (version == SSL2_VERSION) { + version_major = SSL2_VERSION_MAJOR; + version_minor = SSL2_VERSION_MINOR; + } else { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); + return (-1); + } + + s->client_version = version; + + if (ssl2_compat) { + /* create SSL 2.0 compatible Client Hello */ + + /* two byte record header will be written last */ + d = &(buf[2]); + p = d + 9; /* leave space for message type, version, + * individual length fields */ + + *(d++) = SSL2_MT_CLIENT_HELLO; + *(d++) = version_major; + *(d++) = version_minor; + + /* Ciphers supported */ + i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), p, 0); + if (i == 0) { + /* no ciphers */ + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); + return -1; + } + s2n(i, d); + p += i; + + /* + * put in the session-id length (zero since there is no reuse) + */ #if 0 - s->session->session_id_length=0; + s->session->session_id_length = 0; #endif - s2n(0,d); - - if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; - else - 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 - i=ch_len; - s2n(i,d); - memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE); - if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0) - return -1; - - memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - p+=i; - - i= p- &(buf[2]); - buf[0]=((i>>8)&0xff)|0x80; - buf[1]=(i&0xff); - - /* number of bytes to write */ - s->init_num=i+2; - s->init_off=0; - - ssl3_finish_mac(s,&(buf[2]),i); - } - else - { - /* create Client Hello in SSL 3.0/TLS 1.0 format */ - - /* do the record header (5 bytes) and handshake message header (4 bytes) last */ - d = p = &(buf[9]); - - *(p++) = version_major; - *(p++) = version_minor; - - /* Random stuff */ - memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); - p += SSL3_RANDOM_SIZE; - - /* Session ID (zero since there is no reuse) */ - *(p++) = 0; - - /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ - i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char); - if (i == 0) - { - SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); - return -1; - } + s2n(0, d); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len = SSL2_CHALLENGE_LENGTH; + else + 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 + i = ch_len; + s2n(i, d); + memset(&(s->s3->client_random[0]), 0, SSL3_RANDOM_SIZE); + if (RAND_pseudo_bytes + (&(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i) <= 0) + return -1; + + memcpy(p, &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); + p += i; + + i = p - &(buf[2]); + buf[0] = ((i >> 8) & 0xff) | 0x80; + buf[1] = (i & 0xff); + + /* number of bytes to write */ + s->init_num = i + 2; + s->init_off = 0; + + ssl3_finish_mac(s, &(buf[2]), i); + } else { + /* create Client Hello in SSL 3.0/TLS 1.0 format */ + + /* + * do the record header (5 bytes) and handshake message header (4 + * bytes) last + */ + d = p = &(buf[9]); + + *(p++) = version_major; + *(p++) = version_minor; + + /* Random stuff */ + memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); + p += SSL3_RANDOM_SIZE; + + /* Session ID (zero since there is no reuse) */ + *(p++) = 0; + + /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */ + i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), + ssl3_put_cipher_by_char); + if (i == 0) { + 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; + /* + * 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; + s2n(i, p); + p += i; - /* COMPRESSION */ + /* COMPRESSION */ #ifdef OPENSSL_NO_COMP - *(p++)=1; + *(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); - *(p++)=1+j; - for (i=0; i<j; i++) - { - comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); - *(p++)=comp->id; - } + if ((s->options & SSL_OP_NO_COMPRESSION) + || !s->ctx->comp_methods) + j = 0; + else + j = sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++) = 1 + j; + for (i = 0; i < j; i++) { + comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); + *(p++) = comp->id; + } #endif - *(p++)=0; /* Add the NULL method */ + *(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)) == NULL) - { - SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); - return -1; - } + /* 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)) == + NULL) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + return -1; + } #endif - - l = p-d; - - /* fill in 4-byte handshake header */ - d=&(buf[5]); - *(d++)=SSL3_MT_CLIENT_HELLO; - l2n3(l,d); - - l += 4; - - if (l > SSL3_RT_MAX_PLAIN_LENGTH) - { - SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); - return -1; - } - - /* fill in 5-byte record header */ - d=buf; - *(d++) = SSL3_RT_HANDSHAKE; - *(d++) = version_major; - /* 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 */ - s->init_num=p-buf; - s->init_off=0; - - ssl3_finish_mac(s,&(buf[5]), s->init_num - 5); - } - - s->state=SSL23_ST_CW_CLNT_HELLO_B; - s->init_off=0; - } - - /* SSL3_ST_CW_CLNT_HELLO_B */ - ret = ssl23_write_bytes(s); - - if ((ret >= 2) && s->msg_callback) - { - /* Client Hello has been sent; tell msg_callback */ - - 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_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg); - } - - return ret; - } + + l = p - d; + + /* fill in 4-byte handshake header */ + d = &(buf[5]); + *(d++) = SSL3_MT_CLIENT_HELLO; + l2n3(l, d); + + l += 4; + + if (l > SSL3_RT_MAX_PLAIN_LENGTH) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + return -1; + } + + /* fill in 5-byte record header */ + d = buf; + *(d++) = SSL3_RT_HANDSHAKE; + *(d++) = version_major; + /* + * 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 */ + s->init_num = p - buf; + s->init_off = 0; + + ssl3_finish_mac(s, &(buf[5]), s->init_num - 5); + } + + s->state = SSL23_ST_CW_CLNT_HELLO_B; + s->init_off = 0; + } + + /* SSL3_ST_CW_CLNT_HELLO_B */ + ret = ssl23_write_bytes(s); + + if ((ret >= 2) && s->msg_callback) { + /* Client Hello has been sent; tell msg_callback */ + + 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_HANDSHAKE, + s->init_buf->data + 5, ret - 5, s, + s->msg_callback_arg); + } + + return ret; +} static int ssl23_get_server_hello(SSL *s) - { - char buf[8]; - unsigned char *p; - int i; - int n; +{ + char buf[8]; + unsigned char *p; + int i; + int n; - n=ssl23_read_bytes(s,7); + n = ssl23_read_bytes(s, 7); - if (n != 7) return(n); - p=s->packet; + if (n != 7) + return (n); + p = s->packet; - memcpy(buf,p,n); + memcpy(buf, p, n); - if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && - (p[5] == 0x00) && (p[6] == 0x02)) - { + if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && + (p[5] == 0x00) && (p[6] == 0x02)) { #ifdef OPENSSL_NO_SSL2 - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); - goto err; + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + goto err; #else - /* we are talking sslv2 */ - /* we need to clean up the SSLv3 setup and put in the - * sslv2 stuff. */ - int ch_len; - - if (s->options & SSL_OP_NO_SSLv2) - { - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); - goto err; - } - if (s->s2 == NULL) - { - if (!ssl2_new(s)) - goto err; - } - else - ssl2_clear(s); - - if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; - else - 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; - memcpy(s->s2->challenge, - &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - - if (s->s3 != NULL) ssl3_free(s); - - if (!BUF_MEM_grow_clean(s->init_buf, - SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) - { - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); - goto err; - } - - s->state=SSL2_ST_GET_SERVER_HELLO_A; - if (!(s->client_version == SSL2_VERSION)) - /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */ - s->s2->ssl2_rollback=1; - - /* 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; - s->packet= &(s->s2->rbuf[0]); - memcpy(s->packet,buf,n); - s->s2->rbuf_left=n; - s->s2->rbuf_offs=0; - - /* we have already written one */ - s->s2->write_sequence=1; - - s->method=SSLv2_client_method(); - s->handshake_func=s->method->ssl_connect; + /* we are talking sslv2 */ + /* + * we need to clean up the SSLv3 setup and put in the sslv2 stuff. + */ + int ch_len; + + if (s->options & SSL_OP_NO_SSLv2) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + goto err; + } + if (s->s2 == NULL) { + if (!ssl2_new(s)) + goto err; + } else + ssl2_clear(s); + + if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) + ch_len = SSL2_CHALLENGE_LENGTH; + else + 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; + memcpy(s->s2->challenge, + &(s->s3->client_random[SSL3_RANDOM_SIZE - i]), i); + + if (s->s3 != NULL) + ssl3_free(s); + + if (!BUF_MEM_grow_clean(s->init_buf, + SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, ERR_R_BUF_LIB); + goto err; + } + + s->state = SSL2_ST_GET_SERVER_HELLO_A; + if (!(s->client_version == SSL2_VERSION)) + /* + * use special padding (SSL 3.0 draft/RFC 2246, App. E.2) + */ + s->s2->ssl2_rollback = 1; + + /* + * 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; + s->packet = &(s->s2->rbuf[0]); + memcpy(s->packet, buf, n); + s->s2->rbuf_left = n; + s->s2->rbuf_offs = 0; + + /* we have already written one */ + s->s2->write_sequence = 1; + + s->method = SSLv2_client_method(); + s->handshake_func = s->method->ssl_connect; #endif - } - 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 (server hello or alert) */ + } 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 (server hello or alert) */ #ifndef OPENSSL_NO_SSL3 - 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(); - } - else + 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(); + } else #endif - if ((p[2] == TLS1_VERSION_MINOR) && - !(s->options & SSL_OP_NO_TLSv1)) - { - 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; - } - - /* ensure that TLS_MAX_VERSION is up-to-date */ - OPENSSL_assert(s->version <= TLS_MAX_VERSION); - - if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) - { - /* 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_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; - } - - 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 - { - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL); - goto err; - } - s->init_num=0; - - /* Since, if we are sending a ssl23 client hello, we are not - * reusing a session-id */ - if (!ssl_get_new_session(s,0)) - goto err; - - return(SSL_connect(s)); -err: - return(-1); - } + if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) { + 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; + } + + /* ensure that TLS_MAX_VERSION is up-to-date */ + OPENSSL_assert(s->version <= TLS_MAX_VERSION); + + if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) { + /* 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_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; + } + + 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 { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL); + goto err; + } + s->init_num = 0; + + /* + * Since, if we are sending a ssl23 client hello, we are not reusing a + * session-id + */ + if (!ssl_get_new_session(s, 0)) + goto err; + + return (SSL_connect(s)); + err: + return (-1); +} |