X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs23_clnt.c;h=76ad876ec4d130d229781c34dfe268914ace55af;hp=57d3623f3f001bb5c54c71622d7b154a4507fc60;hb=3497ac5d333af98947d0356146a0898e2398d321;hpb=eda1f21f1af8b6f77327e7b37573af9c1ba73726 diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c index 57d3623f3f..76ad876ec4 100644 --- a/ssl/s23_clnt.c +++ b/ssl/s23_clnt.c @@ -1,25 +1,25 @@ /* ssl/s23_clnt.c */ -/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * 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 @@ -49,396 +49,548 @@ * 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 * [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 -#include "buffer.h" -#include "rand.h" -#include "objects.h" -#include "evp.h" #include "ssl_locl.h" +#include +#include +#include +#include -#define BREAK break - -#ifndef NOPROTO +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_SSL3 + 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); +} + +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 = (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)) { + if(!SSL_clear(s)) + return -1; + } + + 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); +} + +/* + * 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_bytes(p, len - 4); + } else + return RAND_bytes(result, len); +} + +static int ssl23_client_hello(SSL *s) +{ + unsigned char *buf; + unsigned char *p, *d; + int i; + unsigned long l; + 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; + + /* + * 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_TLS1_2_CLIENT) + version = TLS1_2_VERSION; + + if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask) + version = TLS1_1_VERSION; #else -static int ssl23_client_hello(); -static int ssl23_get_server_hello(); + 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; +#if !defined(OPENSSL_NO_SSL3) + if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) + version = SSL3_VERSION; + mask &= ~SSL_OP_NO_SSLv3; #endif -static SSL_METHOD *ssl23_get_client_method(ver) -int ver; - { - if (ver == 2) - return(SSLv2_client_method()); - else if (ver == 3) - return(SSLv3_client_method()); - else - return(NULL); - } - -SSL_METHOD *SSLv23_client_method() - { - static int init=1; - static SSL_METHOD SSLv23_client_data; - - if (init) - { - init=0; - 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; - } - return(&SSLv23_client_data); - } - -int ssl23_connect(s) -SSL *s; - { - BUF_MEM *buf; - unsigned long Time=time(NULL); - void (*cb)()=NULL; - int ret= -1; - int new_state,state; - - RAND_seed((unsigned char *)&Time,sizeof(Time)); - ERR_clear_error(); - errno=0; - - if (s->info_callback != NULL) - cb=s->info_callback; - else if (s->ctx->info_callback != NULL) - cb=s->ctx->info_callback; - - if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); - s->in_handshake++; - - 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 (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); - - s->version=3; - 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; - } - - if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } - - ssl3_init_finished_mac(s); - - s->state=SSL23_ST_CW_CLNT_HELLO_A; - s->ctx->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) 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 (cb != NULL) - cb(s,SSL_CB_CONNECT_EXIT,ret); - return(ret); - } - - -static int ssl23_client_hello(s) -SSL *s; - { - unsigned char *buf; - unsigned char *p,*d; - int i,ch_len; - - 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); - } + buf = (unsigned char *)s->init_buf->data; + if (s->state == SSL23_ST_CW_CLNT_HELLO_A) { + 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 (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; + } else if (FIPS_mode()) { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, + SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); + return -1; + } else if (version == SSL3_VERSION) { + version_major = SSL3_VERSION_MAJOR; + version_minor = SSL3_VERSION_MINOR; + } else { + SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE); + return (-1); + } + + s->client_version = version; + + /* 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; #endif + s2n(i, p); + p += i; - p=s->s3->client_random; - RAND_bytes(p,SSL3_RANDOM_SIZE); - - /* Do the message type and length last */ - d= &(buf[2]); - p=d+9; - - *(d++)=SSL2_MT_CLIENT_HELLO; - *(d++)=SSL3_VERSION_MAJOR; - *(d++)=SSL3_VERSION_MINOR; - - /* Ciphers supported */ - i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p); - 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, zero since there is no - * reuse. */ -#if 0 - s->session->session_id_length=0; + /* COMPRESSION */ +#ifdef OPENSSL_NO_COMP + *(p++) = 1; +#else + if (!ssl_allow_compression(s) || !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 */ + +#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 - s2n(0,d); - - if (s->ctx->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; - else - ch_len=SSL2_MAX_CHALLENGE_LENGTH; - - /* write out sslv2 challenge */ - 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); - RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i); - 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); - - s->state=SSL23_ST_CW_CLNT_HELLO_B; - /* number of bytes to write */ - s->init_num=i+2; - s->init_off=0; - - ssl3_finish_mac(s,&(buf[2]),i); - } - - /* SSL3_ST_CW_CLNT_HELLO_B */ - return(ssl23_write_bytes(s)); - } - -static int ssl23_get_server_hello(s) -SSL *s; - { - char buf[8]; - unsigned char *p; - int i,ch_len; - int n; - BIO *bbio; - - n=ssl23_read_bytes(s,7); - - if (n != 7) return(n); - p=s->packet; - - memcpy(buf,p,n); - - if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) && - (p[5] == 0x00) && (p[6] == 0x02)) - { - /* we are talking sslv2 */ - /* we need to clean up the SSLv3 setup and put in the - * sslv2 stuff. */ - - if (s->s2 == NULL) - { - if (!ssl2_new(s)) - goto err; - } - else - ssl2_clear(s); - - if (s->ctx->options & SSL_OP_NETSCAPE_CHALLENGE_BUG) - ch_len=SSL2_CHALLENGE_LENGTH; - else - ch_len=SSL2_MAX_CHALLENGE_LENGTH; - - /* write out sslv2 challenge */ - 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(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; - s->s2->ssl2_rollback=1; - - /* setup the 5 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; - } - else if ((p[0] == SSL3_RT_HANDSHAKE) && - (p[1] == SSL3_VERSION_MAJOR) && - (p[2] == SSL3_VERSION_MINOR) && - (p[5] == SSL3_MT_SERVER_HELLO)) - { - /* we have sslv3 */ - - if (s->bbio == NULL) - { - bbio=BIO_new(BIO_f_buffer()); - if (bbio == NULL) - { - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); - goto err; - } - s->bbio=bbio; - } - else - bbio=s->bbio; - - BIO_reset(bbio); - if (!BIO_set_write_buffer_size(bbio,16*1024)) - { - SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB); - goto err; - } - - /* start the buffering */ - s->wbio=BIO_push(s->bbio,s->wbio); - - /* 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; - - s->method=SSLv3_client_method(); - 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[3] == 0) && - (p[4] == 2)) - { - void (*cb)()=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) - { - j=(i<<8)|p[6]; - cb(s,SSL_CB_READ_ALERT,j); - } - - s->rwstate=SSL_NOTHING; - SSLerr(SSL_F_SSL3_READ_BYTES,1000+p[6]); - goto err; - } - 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; - - s->first_packet=1; - return(SSL_connect(s)); -err: - return(-1); - } + 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 */ + 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; +} + +static int ssl23_get_server_hello(SSL *s) +{ + unsigned char buf[8]; + unsigned char *p; + int i; + int n; + + n = ssl23_read_bytes(s, 7); + + if (n != 7) + return (n); + p = RECORD_LAYER_get_packet(&s->rlayer); + + memcpy(buf, p, n); + + 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)) { + if (FIPS_mode()) { + SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, + SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); + goto err; + } + 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 (!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 */ + + 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; + } + + 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 + */ + if(!RECORD_LAYER_set_data(&s->rlayer, buf, n)) + goto err; + + 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); +}