s23_srvr.c revision 238405
155714Skris/* ssl/s23_srvr.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5889840Skris/* ==================================================================== 59238405Sjkim * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 6089840Skris * 6189840Skris * Redistribution and use in source and binary forms, with or without 6289840Skris * modification, are permitted provided that the following conditions 6389840Skris * are met: 6489840Skris * 6589840Skris * 1. Redistributions of source code must retain the above copyright 6689840Skris * notice, this list of conditions and the following disclaimer. 6789840Skris * 6889840Skris * 2. Redistributions in binary form must reproduce the above copyright 6989840Skris * notice, this list of conditions and the following disclaimer in 7089840Skris * the documentation and/or other materials provided with the 7189840Skris * distribution. 7289840Skris * 7389840Skris * 3. All advertising materials mentioning features or use of this 7489840Skris * software must display the following acknowledgment: 7589840Skris * "This product includes software developed by the OpenSSL Project 7689840Skris * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 7789840Skris * 7889840Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 7989840Skris * endorse or promote products derived from this software without 8089840Skris * prior written permission. For written permission, please contact 8189840Skris * openssl-core@openssl.org. 8289840Skris * 8389840Skris * 5. Products derived from this software may not be called "OpenSSL" 8489840Skris * nor may "OpenSSL" appear in their names without prior written 8589840Skris * permission of the OpenSSL Project. 8689840Skris * 8789840Skris * 6. Redistributions of any form whatsoever must retain the following 8889840Skris * acknowledgment: 8989840Skris * "This product includes software developed by the OpenSSL Project 9089840Skris * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 9189840Skris * 9289840Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 9389840Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9489840Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 9589840Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 9689840Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 9789840Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 9889840Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 9989840Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 10089840Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 10189840Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 10289840Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 10389840Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 10489840Skris * ==================================================================== 10589840Skris * 10689840Skris * This product includes cryptographic software written by Eric Young 10789840Skris * (eay@cryptsoft.com). This product includes software written by Tim 10889840Skris * Hudson (tjh@cryptsoft.com). 10989840Skris * 11089840Skris */ 11155714Skris 11255714Skris#include <stdio.h> 113110007Smarkm#include "ssl_locl.h" 11455714Skris#include <openssl/buffer.h> 11555714Skris#include <openssl/rand.h> 11655714Skris#include <openssl/objects.h> 11755714Skris#include <openssl/evp.h> 118238405Sjkim#ifdef OPENSSL_FIPS 119238405Sjkim#include <openssl/fips.h> 120238405Sjkim#endif 12155714Skris 122238405Sjkimstatic const SSL_METHOD *ssl23_get_server_method(int ver); 12355714Skrisint ssl23_get_client_hello(SSL *s); 124238405Sjkimstatic const SSL_METHOD *ssl23_get_server_method(int ver) 12555714Skris { 126110007Smarkm#ifndef OPENSSL_NO_SSL2 12755714Skris if (ver == SSL2_VERSION) 12855714Skris return(SSLv2_server_method()); 12955949Skris#endif 13055714Skris if (ver == SSL3_VERSION) 13155714Skris return(SSLv3_server_method()); 13255714Skris else if (ver == TLS1_VERSION) 13355714Skris return(TLSv1_server_method()); 134238405Sjkim else if (ver == TLS1_1_VERSION) 135238405Sjkim return(TLSv1_1_server_method()); 136238405Sjkim else if (ver == TLS1_2_VERSION) 137238405Sjkim return(TLSv1_2_server_method()); 13855714Skris else 13955714Skris return(NULL); 14055714Skris } 14155714Skris 142160817SsimonIMPLEMENT_ssl23_meth_func(SSLv23_server_method, 143160817Ssimon ssl23_accept, 144160817Ssimon ssl_undefined_function, 145160817Ssimon ssl23_get_server_method) 14655714Skris 14755714Skrisint ssl23_accept(SSL *s) 14855714Skris { 14955714Skris BUF_MEM *buf; 150160817Ssimon unsigned long Time=(unsigned long)time(NULL); 151110007Smarkm void (*cb)(const SSL *ssl,int type,int val)=NULL; 15255714Skris int ret= -1; 15355714Skris int new_state,state; 15455714Skris 15559194Skris RAND_add(&Time,sizeof(Time),0); 15655714Skris ERR_clear_error(); 15755714Skris clear_sys_error(); 15855714Skris 15955714Skris if (s->info_callback != NULL) 16055714Skris cb=s->info_callback; 16155714Skris else if (s->ctx->info_callback != NULL) 16255714Skris cb=s->ctx->info_callback; 16355714Skris 16489840Skris s->in_handshake++; 16555714Skris if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 16655714Skris 16755714Skris for (;;) 16855714Skris { 16955714Skris state=s->state; 17055714Skris 17155714Skris switch(s->state) 17255714Skris { 17355714Skris case SSL_ST_BEFORE: 17455714Skris case SSL_ST_ACCEPT: 17555714Skris case SSL_ST_BEFORE|SSL_ST_ACCEPT: 17655714Skris case SSL_ST_OK|SSL_ST_ACCEPT: 17755714Skris 17855714Skris s->server=1; 17955714Skris if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 18055714Skris 18155714Skris /* s->version=SSL3_VERSION; */ 18255714Skris s->type=SSL_ST_ACCEPT; 18355714Skris 18455714Skris if (s->init_buf == NULL) 18555714Skris { 18655714Skris if ((buf=BUF_MEM_new()) == NULL) 18755714Skris { 18855714Skris ret= -1; 18955714Skris goto end; 19055714Skris } 19155714Skris if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 19255714Skris { 19355714Skris ret= -1; 19455714Skris goto end; 19555714Skris } 19655714Skris s->init_buf=buf; 19755714Skris } 19855714Skris 19955714Skris ssl3_init_finished_mac(s); 20055714Skris 20155714Skris s->state=SSL23_ST_SR_CLNT_HELLO_A; 20255714Skris s->ctx->stats.sess_accept++; 20355714Skris s->init_num=0; 20455714Skris break; 20555714Skris 20655714Skris case SSL23_ST_SR_CLNT_HELLO_A: 20755714Skris case SSL23_ST_SR_CLNT_HELLO_B: 20855714Skris 20955714Skris s->shutdown=0; 21055714Skris ret=ssl23_get_client_hello(s); 21155714Skris if (ret >= 0) cb=NULL; 21255714Skris goto end; 21355714Skris /* break; */ 21455714Skris 21555714Skris default: 21655714Skris SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE); 21755714Skris ret= -1; 21855714Skris goto end; 21955714Skris /* break; */ 22055714Skris } 22155714Skris 22255714Skris if ((cb != NULL) && (s->state != state)) 22355714Skris { 22455714Skris new_state=s->state; 22555714Skris s->state=state; 22655714Skris cb(s,SSL_CB_ACCEPT_LOOP,1); 22755714Skris s->state=new_state; 22855714Skris } 22955714Skris } 23055714Skrisend: 23189840Skris s->in_handshake--; 23255714Skris if (cb != NULL) 23355714Skris cb(s,SSL_CB_ACCEPT_EXIT,ret); 23455714Skris return(ret); 23555714Skris } 23655714Skris 23755714Skris 23855714Skrisint ssl23_get_client_hello(SSL *s) 23955714Skris { 24059194Skris char buf_space[11]; /* Request this many bytes in initial read. 24159194Skris * We can detect SSL 3.0/TLS 1.0 Client Hellos 24259194Skris * ('type == 3') correctly only when the following 24359194Skris * is in a single record, which is not guaranteed by 24459194Skris * the protocol specification: 24559194Skris * Byte Content 24659194Skris * 0 type \ 24759194Skris * 1/2 version > record header 24859194Skris * 3/4 length / 24959194Skris * 5 msg_type \ 25059194Skris * 6-8 length > Client Hello message 25159194Skris * 9/10 client_version / 25259194Skris */ 25355714Skris char *buf= &(buf_space[0]); 254110007Smarkm unsigned char *p,*d,*d_len,*dd; 25555714Skris unsigned int i; 25655714Skris unsigned int csl,sil,cl; 25759194Skris int n=0,j; 25859194Skris int type=0; 25955714Skris int v[2]; 26055714Skris 26155714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_A) 26255714Skris { 26359194Skris /* read the initial header */ 26459194Skris v[0]=v[1]=0; 26559194Skris 26655714Skris if (!ssl3_setup_buffers(s)) goto err; 26755714Skris 26859194Skris n=ssl23_read_bytes(s, sizeof buf_space); 26959194Skris if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */ 27055714Skris 27155714Skris p=s->packet; 27255714Skris 27355714Skris memcpy(buf,p,n); 27455714Skris 27555714Skris if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) 27655714Skris { 27759194Skris /* 27859194Skris * SSLv2 header 27959194Skris */ 28055714Skris if ((p[3] == 0x00) && (p[4] == 0x02)) 28155714Skris { 28255714Skris v[0]=p[3]; v[1]=p[4]; 28355714Skris /* SSLv2 */ 28455714Skris if (!(s->options & SSL_OP_NO_SSLv2)) 28555714Skris type=1; 28655714Skris } 28755714Skris else if (p[3] == SSL3_VERSION_MAJOR) 28855714Skris { 28955714Skris v[0]=p[3]; v[1]=p[4]; 29055714Skris /* SSLv3/TLSv1 */ 29155714Skris if (p[4] >= TLS1_VERSION_MINOR) 29255714Skris { 293238405Sjkim if (p[4] >= TLS1_2_VERSION_MINOR && 294238405Sjkim !(s->options & SSL_OP_NO_TLSv1_2)) 29555714Skris { 296238405Sjkim s->version=TLS1_2_VERSION; 297238405Sjkim s->state=SSL23_ST_SR_CLNT_HELLO_B; 298238405Sjkim } 299238405Sjkim else if (p[4] >= TLS1_1_VERSION_MINOR && 300238405Sjkim !(s->options & SSL_OP_NO_TLSv1_1)) 301238405Sjkim { 302238405Sjkim s->version=TLS1_1_VERSION; 303238405Sjkim /* type=2; */ /* done later to survive restarts */ 304238405Sjkim s->state=SSL23_ST_SR_CLNT_HELLO_B; 305238405Sjkim } 306238405Sjkim else if (!(s->options & SSL_OP_NO_TLSv1)) 307238405Sjkim { 30859194Skris s->version=TLS1_VERSION; 30959194Skris /* type=2; */ /* done later to survive restarts */ 31055714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 31155714Skris } 31255714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 31355714Skris { 31459194Skris s->version=SSL3_VERSION; 31559194Skris /* type=2; */ 31655714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 31755714Skris } 31855714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 31955714Skris { 32055714Skris type=1; 32155714Skris } 32255714Skris } 32355714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 32459194Skris { 32559194Skris s->version=SSL3_VERSION; 32659194Skris /* type=2; */ 32755714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 32859194Skris } 32955714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 33055714Skris type=1; 33155714Skris 33255714Skris } 33355714Skris } 33455714Skris else if ((p[0] == SSL3_RT_HANDSHAKE) && 33555714Skris (p[1] == SSL3_VERSION_MAJOR) && 33659194Skris (p[5] == SSL3_MT_CLIENT_HELLO) && 33759194Skris ((p[3] == 0 && p[4] < 5 /* silly record length? */) 338205128Ssimon || (p[9] >= p[1]))) 33955714Skris { 34059194Skris /* 34159194Skris * SSLv3 or tls1 header 34259194Skris */ 34359194Skris 34468654Skris v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */ 34559194Skris /* We must look at client_version inside the Client Hello message 34668654Skris * to get the correct minor version. 34768654Skris * However if we have only a pathologically small fragment of the 34889840Skris * Client Hello message, this would be difficult, and we'd have 34989840Skris * to read more records to find out. 35089840Skris * No known SSL 3.0 client fragments ClientHello like this, 35189840Skris * so we simply assume TLS 1.0 to avoid protocol version downgrade 35289840Skris * attacks. */ 35359194Skris if (p[3] == 0 && p[4] < 6) 35468654Skris { 35589840Skris#if 0 35668654Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL); 35768654Skris goto err; 35889840Skris#else 35989840Skris v[1] = TLS1_VERSION_MINOR; 36089840Skris#endif 36168654Skris } 362205128Ssimon /* if major version number > 3 set minor to a value 363205128Ssimon * which will use the highest version 3 we support. 364205128Ssimon * If TLS 2.0 ever appears we will need to revise 365205128Ssimon * this.... 366205128Ssimon */ 367205128Ssimon else if (p[9] > SSL3_VERSION_MAJOR) 368205128Ssimon v[1]=0xff; 36989840Skris else 37089840Skris v[1]=p[10]; /* minor version according to client_version */ 37159194Skris if (v[1] >= TLS1_VERSION_MINOR) 37255714Skris { 373238405Sjkim if (v[1] >= TLS1_2_VERSION_MINOR && 374238405Sjkim !(s->options & SSL_OP_NO_TLSv1_2)) 37555714Skris { 376238405Sjkim s->version=TLS1_2_VERSION; 377238405Sjkim type=3; 378238405Sjkim } 379238405Sjkim else if (v[1] >= TLS1_1_VERSION_MINOR && 380238405Sjkim !(s->options & SSL_OP_NO_TLSv1_1)) 381238405Sjkim { 382238405Sjkim s->version=TLS1_1_VERSION; 383238405Sjkim type=3; 384238405Sjkim } 385238405Sjkim else if (!(s->options & SSL_OP_NO_TLSv1)) 386238405Sjkim { 38759194Skris s->version=TLS1_VERSION; 38855714Skris type=3; 38955714Skris } 39055714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 39159194Skris { 39259194Skris s->version=SSL3_VERSION; 39355714Skris type=3; 39459194Skris } 39555714Skris } 39689840Skris else 39759194Skris { 39889840Skris /* client requests SSL 3.0 */ 39989840Skris if (!(s->options & SSL_OP_NO_SSLv3)) 40089840Skris { 40189840Skris s->version=SSL3_VERSION; 40289840Skris type=3; 40389840Skris } 40489840Skris else if (!(s->options & SSL_OP_NO_TLSv1)) 40589840Skris { 40689840Skris /* we won't be able to use TLS of course, 40789840Skris * but this will send an appropriate alert */ 40889840Skris s->version=TLS1_VERSION; 40989840Skris type=3; 41089840Skris } 41159194Skris } 41255714Skris } 41355714Skris else if ((strncmp("GET ", (char *)p,4) == 0) || 41455714Skris (strncmp("POST ",(char *)p,5) == 0) || 41555714Skris (strncmp("HEAD ",(char *)p,5) == 0) || 41655714Skris (strncmp("PUT ", (char *)p,4) == 0)) 41755714Skris { 41855714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST); 41955714Skris goto err; 42055714Skris } 42155714Skris else if (strncmp("CONNECT",(char *)p,7) == 0) 42255714Skris { 42355714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST); 42455714Skris goto err; 42555714Skris } 42655714Skris } 42755714Skris 428194206Ssimon#ifdef OPENSSL_FIPS 429194206Ssimon if (FIPS_mode() && (s->version < TLS1_VERSION)) 430194206Ssimon { 431194206Ssimon SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 432194206Ssimon SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); 433194206Ssimon goto err; 434194206Ssimon } 435194206Ssimon#endif 436194206Ssimon 43755714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_B) 43855714Skris { 43959194Skris /* we have SSLv3/TLSv1 in an SSLv2 header 44059194Skris * (other cases skip this state) */ 44159194Skris 44255714Skris type=2; 44355714Skris p=s->packet; 44459194Skris v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ 44559194Skris v[1] = p[4]; 44659194Skris 44755714Skris n=((p[0]&0x7f)<<8)|p[1]; 44855714Skris if (n > (1024*4)) 44955714Skris { 45055714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE); 45155714Skris goto err; 45255714Skris } 45355714Skris 45455714Skris j=ssl23_read_bytes(s,n+2); 45555714Skris if (j <= 0) return(j); 45655714Skris 457110007Smarkm ssl3_finish_mac(s, s->packet+2, s->packet_length-2); 458110007Smarkm if (s->msg_callback) 459110007Smarkm s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */ 46055714Skris 46155714Skris p=s->packet; 46255714Skris p+=5; 46355714Skris n2s(p,csl); 46455714Skris n2s(p,sil); 46555714Skris n2s(p,cl); 46655714Skris d=(unsigned char *)s->init_buf->data; 467238405Sjkim if ((csl+sil+cl+11) != s->packet_length) /* We can't have TLS extensions in SSL 2.0 format 468238405Sjkim * Client Hello, can we? Error condition should be 469238405Sjkim * '>' otherweise */ 47055714Skris { 47155714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH); 47255714Skris goto err; 47355714Skris } 47455714Skris 475110007Smarkm /* record header: msg_type ... */ 476110007Smarkm *(d++) = SSL3_MT_CLIENT_HELLO; 477110007Smarkm /* ... and length (actual value will be written later) */ 478110007Smarkm d_len = d; 479110007Smarkm d += 3; 480110007Smarkm 481110007Smarkm /* client_version */ 48259194Skris *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ 48359194Skris *(d++) = v[1]; 48455714Skris 48555714Skris /* lets populate the random area */ 48659194Skris /* get the challenge_length */ 48755714Skris i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl; 48855714Skris memset(d,0,SSL3_RANDOM_SIZE); 48955714Skris memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i); 49055714Skris d+=SSL3_RANDOM_SIZE; 49155714Skris 49255714Skris /* no session-id reuse */ 49355714Skris *(d++)=0; 49455714Skris 49555714Skris /* ciphers */ 49655714Skris j=0; 49755714Skris dd=d; 49855714Skris d+=2; 49955714Skris for (i=0; i<csl; i+=3) 50055714Skris { 50155714Skris if (p[i] != 0) continue; 50255714Skris *(d++)=p[i+1]; 50355714Skris *(d++)=p[i+2]; 50455714Skris j+=2; 50555714Skris } 50655714Skris s2n(j,dd); 50755714Skris 50855714Skris /* COMPRESSION */ 50955714Skris *(d++)=1; 51055714Skris *(d++)=0; 51155714Skris 512238405Sjkim#if 0 513238405Sjkim /* copy any remaining data with may be extensions */ 514238405Sjkim p = p+csl+sil+cl; 515238405Sjkim while (p < s->packet+s->packet_length) 516238405Sjkim { 517238405Sjkim *(d++)=*(p++); 518238405Sjkim } 519238405Sjkim#endif 520238405Sjkim 521110007Smarkm i = (d-(unsigned char *)s->init_buf->data) - 4; 522110007Smarkm l2n3((long)i, d_len); 52355714Skris 52455714Skris /* get the data reused from the init_buf */ 52555714Skris s->s3->tmp.reuse_message=1; 52655714Skris s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO; 52755714Skris s->s3->tmp.message_size=i; 52855714Skris } 52955714Skris 53059194Skris /* imaginary new state (for program structure): */ 53159194Skris /* s->state = SSL23_SR_CLNT_HELLO_C */ 53259194Skris 53355714Skris if (type == 1) 53455714Skris { 535110007Smarkm#ifdef OPENSSL_NO_SSL2 53659194Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); 53759194Skris goto err; 53855949Skris#else 53955714Skris /* we are talking sslv2 */ 54055714Skris /* we need to clean up the SSLv3/TLSv1 setup and put in the 54155714Skris * sslv2 stuff. */ 54255714Skris 54355714Skris if (s->s2 == NULL) 54455714Skris { 54555714Skris if (!ssl2_new(s)) 54655714Skris goto err; 54755714Skris } 54855714Skris else 54955714Skris ssl2_clear(s); 55055714Skris 55155714Skris if (s->s3 != NULL) ssl3_free(s); 55255714Skris 553110007Smarkm if (!BUF_MEM_grow_clean(s->init_buf, 55455714Skris SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 55555714Skris { 55655714Skris goto err; 55755714Skris } 55855714Skris 55955714Skris s->state=SSL2_ST_GET_CLIENT_HELLO_A; 560151233Scperciva if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3) 56155714Skris s->s2->ssl2_rollback=0; 56255714Skris else 56368654Skris /* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0 56468654Skris * (SSL 3.0 draft/RFC 2246, App. E.2) */ 56555714Skris s->s2->ssl2_rollback=1; 56655714Skris 56759194Skris /* setup the n bytes we have read so we get them from 56855714Skris * the sslv2 buffer */ 56955714Skris s->rstate=SSL_ST_READ_HEADER; 57055714Skris s->packet_length=n; 57155714Skris s->packet= &(s->s2->rbuf[0]); 57255714Skris memcpy(s->packet,buf,n); 57355714Skris s->s2->rbuf_left=n; 57455714Skris s->s2->rbuf_offs=0; 57555714Skris 57655714Skris s->method=SSLv2_server_method(); 57755714Skris s->handshake_func=s->method->ssl_accept; 57855949Skris#endif 57955714Skris } 58055714Skris 58155714Skris if ((type == 2) || (type == 3)) 58255714Skris { 58359194Skris /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */ 58455714Skris 58555714Skris if (!ssl_init_wbio_buffer(s,1)) goto err; 58655714Skris 58755714Skris /* we are in this state */ 58855714Skris s->state=SSL3_ST_SR_CLNT_HELLO_A; 58955714Skris 59055714Skris if (type == 3) 59155714Skris { 59255714Skris /* put the 'n' bytes we have read into the input buffer 59355714Skris * for SSLv3 */ 59455714Skris s->rstate=SSL_ST_READ_HEADER; 59555714Skris s->packet_length=n; 596238405Sjkim if (s->s3->rbuf.buf == NULL) 597238405Sjkim if (!ssl3_setup_read_buffer(s)) 598238405Sjkim goto err; 599238405Sjkim 60055714Skris s->packet= &(s->s3->rbuf.buf[0]); 60155714Skris memcpy(s->packet,buf,n); 60255714Skris s->s3->rbuf.left=n; 60355714Skris s->s3->rbuf.offset=0; 60455714Skris } 60555714Skris else 60655714Skris { 60755714Skris s->packet_length=0; 60855714Skris s->s3->rbuf.left=0; 60955714Skris s->s3->rbuf.offset=0; 61055714Skris } 611238405Sjkim if (s->version == TLS1_2_VERSION) 612238405Sjkim s->method = TLSv1_2_server_method(); 613238405Sjkim else if (s->version == TLS1_1_VERSION) 614238405Sjkim s->method = TLSv1_1_server_method(); 615238405Sjkim else if (s->version == TLS1_VERSION) 61659194Skris s->method = TLSv1_server_method(); 61755714Skris else 61859194Skris s->method = SSLv3_server_method(); 61959194Skris#if 0 /* ssl3_get_client_hello does this */ 62055714Skris s->client_version=(v[0]<<8)|v[1]; 62159194Skris#endif 62255714Skris s->handshake_func=s->method->ssl_accept; 62355714Skris } 62455714Skris 62555714Skris if ((type < 1) || (type > 3)) 62655714Skris { 62755714Skris /* bad, very bad */ 62855714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL); 62955714Skris goto err; 63055714Skris } 63155714Skris s->init_num=0; 63255714Skris 63368654Skris if (buf != buf_space) OPENSSL_free(buf); 63455714Skris return(SSL_accept(s)); 63555714Skriserr: 63668654Skris if (buf != buf_space) OPENSSL_free(buf); 63755714Skris return(-1); 63855714Skris } 639