s23_srvr.c revision 273415
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/* ==================================================================== 5989840Skris * Copyright (c) 1998-2001 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> 11855714Skris 11955714Skrisstatic SSL_METHOD *ssl23_get_server_method(int ver); 12055714Skrisint ssl23_get_client_hello(SSL *s); 12155714Skrisstatic SSL_METHOD *ssl23_get_server_method(int ver) 12255714Skris { 123110007Smarkm#ifndef OPENSSL_NO_SSL2 12455714Skris if (ver == SSL2_VERSION) 12555714Skris return(SSLv2_server_method()); 12655949Skris#endif 127273415Sdelphij#ifndef OPENSSL_NO_SSL3 12855714Skris if (ver == SSL3_VERSION) 12955714Skris return(SSLv3_server_method()); 130273415Sdelphij#endif 131273415Sdelphij if (ver == TLS1_VERSION) 13255714Skris return(TLSv1_server_method()); 13355714Skris else 13455714Skris return(NULL); 13555714Skris } 13655714Skris 137160817SsimonIMPLEMENT_ssl23_meth_func(SSLv23_server_method, 138160817Ssimon ssl23_accept, 139160817Ssimon ssl_undefined_function, 140160817Ssimon ssl23_get_server_method) 14155714Skris 14255714Skrisint ssl23_accept(SSL *s) 14355714Skris { 14455714Skris BUF_MEM *buf; 145160817Ssimon unsigned long Time=(unsigned long)time(NULL); 146110007Smarkm void (*cb)(const SSL *ssl,int type,int val)=NULL; 14755714Skris int ret= -1; 14855714Skris int new_state,state; 14955714Skris 15059194Skris RAND_add(&Time,sizeof(Time),0); 15155714Skris ERR_clear_error(); 15255714Skris clear_sys_error(); 15355714Skris 15455714Skris if (s->info_callback != NULL) 15555714Skris cb=s->info_callback; 15655714Skris else if (s->ctx->info_callback != NULL) 15755714Skris cb=s->ctx->info_callback; 15855714Skris 15989840Skris s->in_handshake++; 16055714Skris if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 16155714Skris 16255714Skris for (;;) 16355714Skris { 16455714Skris state=s->state; 16555714Skris 16655714Skris switch(s->state) 16755714Skris { 16855714Skris case SSL_ST_BEFORE: 16955714Skris case SSL_ST_ACCEPT: 17055714Skris case SSL_ST_BEFORE|SSL_ST_ACCEPT: 17155714Skris case SSL_ST_OK|SSL_ST_ACCEPT: 17255714Skris 17355714Skris s->server=1; 17455714Skris if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 17555714Skris 17655714Skris /* s->version=SSL3_VERSION; */ 17755714Skris s->type=SSL_ST_ACCEPT; 17855714Skris 17955714Skris if (s->init_buf == NULL) 18055714Skris { 18155714Skris if ((buf=BUF_MEM_new()) == NULL) 18255714Skris { 18355714Skris ret= -1; 18455714Skris goto end; 18555714Skris } 18655714Skris if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 18755714Skris { 18855714Skris ret= -1; 18955714Skris goto end; 19055714Skris } 19155714Skris s->init_buf=buf; 19255714Skris } 19355714Skris 19455714Skris ssl3_init_finished_mac(s); 19555714Skris 19655714Skris s->state=SSL23_ST_SR_CLNT_HELLO_A; 19755714Skris s->ctx->stats.sess_accept++; 19855714Skris s->init_num=0; 19955714Skris break; 20055714Skris 20155714Skris case SSL23_ST_SR_CLNT_HELLO_A: 20255714Skris case SSL23_ST_SR_CLNT_HELLO_B: 20355714Skris 20455714Skris s->shutdown=0; 20555714Skris ret=ssl23_get_client_hello(s); 20655714Skris if (ret >= 0) cb=NULL; 20755714Skris goto end; 20855714Skris /* break; */ 20955714Skris 21055714Skris default: 21155714Skris SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE); 21255714Skris ret= -1; 21355714Skris goto end; 21455714Skris /* break; */ 21555714Skris } 21655714Skris 21755714Skris if ((cb != NULL) && (s->state != state)) 21855714Skris { 21955714Skris new_state=s->state; 22055714Skris s->state=state; 22155714Skris cb(s,SSL_CB_ACCEPT_LOOP,1); 22255714Skris s->state=new_state; 22355714Skris } 22455714Skris } 22555714Skrisend: 22689840Skris s->in_handshake--; 22755714Skris if (cb != NULL) 22855714Skris cb(s,SSL_CB_ACCEPT_EXIT,ret); 22955714Skris return(ret); 23055714Skris } 23155714Skris 23255714Skris 23355714Skrisint ssl23_get_client_hello(SSL *s) 23455714Skris { 23559194Skris char buf_space[11]; /* Request this many bytes in initial read. 23659194Skris * We can detect SSL 3.0/TLS 1.0 Client Hellos 23759194Skris * ('type == 3') correctly only when the following 23859194Skris * is in a single record, which is not guaranteed by 23959194Skris * the protocol specification: 24059194Skris * Byte Content 24159194Skris * 0 type \ 24259194Skris * 1/2 version > record header 24359194Skris * 3/4 length / 24459194Skris * 5 msg_type \ 24559194Skris * 6-8 length > Client Hello message 24659194Skris * 9/10 client_version / 24759194Skris */ 24855714Skris char *buf= &(buf_space[0]); 249110007Smarkm unsigned char *p,*d,*d_len,*dd; 25055714Skris unsigned int i; 25155714Skris unsigned int csl,sil,cl; 25259194Skris int n=0,j; 25359194Skris int type=0; 25455714Skris int v[2]; 25555714Skris 25655714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_A) 25755714Skris { 25859194Skris /* read the initial header */ 25959194Skris v[0]=v[1]=0; 26059194Skris 26155714Skris if (!ssl3_setup_buffers(s)) goto err; 26255714Skris 26359194Skris n=ssl23_read_bytes(s, sizeof buf_space); 26459194Skris if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */ 26555714Skris 26655714Skris p=s->packet; 26755714Skris 26855714Skris memcpy(buf,p,n); 26955714Skris 27055714Skris if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) 27155714Skris { 27259194Skris /* 27359194Skris * SSLv2 header 27459194Skris */ 27555714Skris if ((p[3] == 0x00) && (p[4] == 0x02)) 27655714Skris { 27755714Skris v[0]=p[3]; v[1]=p[4]; 27855714Skris /* SSLv2 */ 27955714Skris if (!(s->options & SSL_OP_NO_SSLv2)) 28055714Skris type=1; 28155714Skris } 28255714Skris else if (p[3] == SSL3_VERSION_MAJOR) 28355714Skris { 28455714Skris v[0]=p[3]; v[1]=p[4]; 28555714Skris /* SSLv3/TLSv1 */ 28655714Skris if (p[4] >= TLS1_VERSION_MINOR) 28755714Skris { 28855714Skris if (!(s->options & SSL_OP_NO_TLSv1)) 28955714Skris { 29059194Skris s->version=TLS1_VERSION; 29159194Skris /* type=2; */ /* done later to survive restarts */ 29255714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 29355714Skris } 29455714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 29555714Skris { 29659194Skris s->version=SSL3_VERSION; 29759194Skris /* type=2; */ 29855714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 29955714Skris } 30055714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 30155714Skris { 30255714Skris type=1; 30355714Skris } 30455714Skris } 30555714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 30659194Skris { 30759194Skris s->version=SSL3_VERSION; 30859194Skris /* type=2; */ 30955714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 31059194Skris } 31155714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 31255714Skris type=1; 31355714Skris 31455714Skris } 31555714Skris } 31655714Skris else if ((p[0] == SSL3_RT_HANDSHAKE) && 31755714Skris (p[1] == SSL3_VERSION_MAJOR) && 31859194Skris (p[5] == SSL3_MT_CLIENT_HELLO) && 31959194Skris ((p[3] == 0 && p[4] < 5 /* silly record length? */) 320205128Ssimon || (p[9] >= p[1]))) 32155714Skris { 32259194Skris /* 32359194Skris * SSLv3 or tls1 header 32459194Skris */ 32559194Skris 32668654Skris v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */ 32759194Skris /* We must look at client_version inside the Client Hello message 32868654Skris * to get the correct minor version. 32968654Skris * However if we have only a pathologically small fragment of the 33089840Skris * Client Hello message, this would be difficult, and we'd have 33189840Skris * to read more records to find out. 33289840Skris * No known SSL 3.0 client fragments ClientHello like this, 333271305Sdelphij * so we simply reject such connections to avoid 334271305Sdelphij * protocol version downgrade attacks. */ 33559194Skris if (p[3] == 0 && p[4] < 6) 33668654Skris { 33768654Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL); 33868654Skris goto err; 33968654Skris } 340205128Ssimon /* if major version number > 3 set minor to a value 341205128Ssimon * which will use the highest version 3 we support. 342205128Ssimon * If TLS 2.0 ever appears we will need to revise 343205128Ssimon * this.... 344205128Ssimon */ 345271305Sdelphij if (p[9] > SSL3_VERSION_MAJOR) 346205128Ssimon v[1]=0xff; 34789840Skris else 34889840Skris v[1]=p[10]; /* minor version according to client_version */ 34959194Skris if (v[1] >= TLS1_VERSION_MINOR) 35055714Skris { 35155714Skris if (!(s->options & SSL_OP_NO_TLSv1)) 35255714Skris { 35359194Skris s->version=TLS1_VERSION; 35455714Skris type=3; 35555714Skris } 35655714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 35759194Skris { 35859194Skris s->version=SSL3_VERSION; 35955714Skris type=3; 36059194Skris } 36155714Skris } 36289840Skris else 36359194Skris { 36489840Skris /* client requests SSL 3.0 */ 36589840Skris if (!(s->options & SSL_OP_NO_SSLv3)) 36689840Skris { 36789840Skris s->version=SSL3_VERSION; 36889840Skris type=3; 36989840Skris } 37089840Skris else if (!(s->options & SSL_OP_NO_TLSv1)) 37189840Skris { 37289840Skris /* we won't be able to use TLS of course, 37389840Skris * but this will send an appropriate alert */ 37489840Skris s->version=TLS1_VERSION; 37589840Skris type=3; 37689840Skris } 37759194Skris } 37855714Skris } 37955714Skris else if ((strncmp("GET ", (char *)p,4) == 0) || 38055714Skris (strncmp("POST ",(char *)p,5) == 0) || 38155714Skris (strncmp("HEAD ",(char *)p,5) == 0) || 38255714Skris (strncmp("PUT ", (char *)p,4) == 0)) 38355714Skris { 38455714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST); 38555714Skris goto err; 38655714Skris } 38755714Skris else if (strncmp("CONNECT",(char *)p,7) == 0) 38855714Skris { 38955714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST); 39055714Skris goto err; 39155714Skris } 39255714Skris } 39355714Skris 394194206Ssimon#ifdef OPENSSL_FIPS 395194206Ssimon if (FIPS_mode() && (s->version < TLS1_VERSION)) 396194206Ssimon { 397194206Ssimon SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, 398194206Ssimon SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); 399194206Ssimon goto err; 400194206Ssimon } 401194206Ssimon#endif 402194206Ssimon 403273415Sdelphij /* ensure that TLS_MAX_VERSION is up-to-date */ 404273415Sdelphij OPENSSL_assert(s->version <= TLS_MAX_VERSION); 405273415Sdelphij 40655714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_B) 40755714Skris { 40859194Skris /* we have SSLv3/TLSv1 in an SSLv2 header 40959194Skris * (other cases skip this state) */ 41059194Skris 41155714Skris type=2; 41255714Skris p=s->packet; 41359194Skris v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ 41459194Skris v[1] = p[4]; 41559194Skris 416271305Sdelphij /* An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2 417271305Sdelphij * header is sent directly on the wire, not wrapped as a TLS 418271305Sdelphij * record. It's format is: 419271305Sdelphij * Byte Content 420271305Sdelphij * 0-1 msg_length 421271305Sdelphij * 2 msg_type 422271305Sdelphij * 3-4 version 423271305Sdelphij * 5-6 cipher_spec_length 424271305Sdelphij * 7-8 session_id_length 425271305Sdelphij * 9-10 challenge_length 426271305Sdelphij * ... ... 427271305Sdelphij */ 42855714Skris n=((p[0]&0x7f)<<8)|p[1]; 42955714Skris if (n > (1024*4)) 43055714Skris { 43155714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE); 43255714Skris goto err; 43355714Skris } 434271305Sdelphij if (n < 9) 435271305Sdelphij { 436271305Sdelphij SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH); 437271305Sdelphij goto err; 438271305Sdelphij } 43955714Skris 44055714Skris j=ssl23_read_bytes(s,n+2); 441271305Sdelphij /* We previously read 11 bytes, so if j > 0, we must have 442271305Sdelphij * j == n+2 == s->packet_length. We have at least 11 valid 443271305Sdelphij * packet bytes. */ 44455714Skris if (j <= 0) return(j); 44555714Skris 446110007Smarkm ssl3_finish_mac(s, s->packet+2, s->packet_length-2); 447110007Smarkm if (s->msg_callback) 448110007Smarkm s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */ 44955714Skris 45055714Skris p=s->packet; 45155714Skris p+=5; 45255714Skris n2s(p,csl); 45355714Skris n2s(p,sil); 45455714Skris n2s(p,cl); 45555714Skris d=(unsigned char *)s->init_buf->data; 45655714Skris if ((csl+sil+cl+11) != s->packet_length) 45755714Skris { 45855714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH); 45955714Skris goto err; 46055714Skris } 46155714Skris 462110007Smarkm /* record header: msg_type ... */ 463110007Smarkm *(d++) = SSL3_MT_CLIENT_HELLO; 464110007Smarkm /* ... and length (actual value will be written later) */ 465110007Smarkm d_len = d; 466110007Smarkm d += 3; 467110007Smarkm 468110007Smarkm /* client_version */ 46959194Skris *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ 47059194Skris *(d++) = v[1]; 47155714Skris 47255714Skris /* lets populate the random area */ 47359194Skris /* get the challenge_length */ 47455714Skris i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl; 47555714Skris memset(d,0,SSL3_RANDOM_SIZE); 47655714Skris memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i); 47755714Skris d+=SSL3_RANDOM_SIZE; 47855714Skris 47955714Skris /* no session-id reuse */ 48055714Skris *(d++)=0; 48155714Skris 48255714Skris /* ciphers */ 48355714Skris j=0; 48455714Skris dd=d; 48555714Skris d+=2; 48655714Skris for (i=0; i<csl; i+=3) 48755714Skris { 48855714Skris if (p[i] != 0) continue; 48955714Skris *(d++)=p[i+1]; 49055714Skris *(d++)=p[i+2]; 49155714Skris j+=2; 49255714Skris } 49355714Skris s2n(j,dd); 49455714Skris 49555714Skris /* COMPRESSION */ 49655714Skris *(d++)=1; 49755714Skris *(d++)=0; 49855714Skris 499110007Smarkm i = (d-(unsigned char *)s->init_buf->data) - 4; 500110007Smarkm l2n3((long)i, d_len); 50155714Skris 50255714Skris /* get the data reused from the init_buf */ 50355714Skris s->s3->tmp.reuse_message=1; 50455714Skris s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO; 50555714Skris s->s3->tmp.message_size=i; 50655714Skris } 50755714Skris 50859194Skris /* imaginary new state (for program structure): */ 50959194Skris /* s->state = SSL23_SR_CLNT_HELLO_C */ 51059194Skris 51155714Skris if (type == 1) 51255714Skris { 513110007Smarkm#ifdef OPENSSL_NO_SSL2 51459194Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); 51559194Skris goto err; 51655949Skris#else 51755714Skris /* we are talking sslv2 */ 51855714Skris /* we need to clean up the SSLv3/TLSv1 setup and put in the 51955714Skris * sslv2 stuff. */ 52055714Skris 52155714Skris if (s->s2 == NULL) 52255714Skris { 52355714Skris if (!ssl2_new(s)) 52455714Skris goto err; 52555714Skris } 52655714Skris else 52755714Skris ssl2_clear(s); 52855714Skris 52955714Skris if (s->s3 != NULL) ssl3_free(s); 53055714Skris 531110007Smarkm if (!BUF_MEM_grow_clean(s->init_buf, 53255714Skris SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 53355714Skris { 53455714Skris goto err; 53555714Skris } 53655714Skris 53755714Skris s->state=SSL2_ST_GET_CLIENT_HELLO_A; 538151233Scperciva if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3) 53955714Skris s->s2->ssl2_rollback=0; 54055714Skris else 54168654Skris /* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0 54268654Skris * (SSL 3.0 draft/RFC 2246, App. E.2) */ 54355714Skris s->s2->ssl2_rollback=1; 54455714Skris 54559194Skris /* setup the n bytes we have read so we get them from 54655714Skris * the sslv2 buffer */ 54755714Skris s->rstate=SSL_ST_READ_HEADER; 54855714Skris s->packet_length=n; 54955714Skris s->packet= &(s->s2->rbuf[0]); 55055714Skris memcpy(s->packet,buf,n); 55155714Skris s->s2->rbuf_left=n; 55255714Skris s->s2->rbuf_offs=0; 55355714Skris 55455714Skris s->method=SSLv2_server_method(); 55555714Skris s->handshake_func=s->method->ssl_accept; 55655949Skris#endif 55755714Skris } 55855714Skris 55955714Skris if ((type == 2) || (type == 3)) 56055714Skris { 56159194Skris /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */ 562273415Sdelphij s->method = ssl23_get_server_method(s->version); 563273415Sdelphij if (s->method == NULL) 564273415Sdelphij { 565273415Sdelphij SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); 566273415Sdelphij goto err; 567273415Sdelphij } 56855714Skris 56955714Skris if (!ssl_init_wbio_buffer(s,1)) goto err; 57055714Skris 57155714Skris /* we are in this state */ 57255714Skris s->state=SSL3_ST_SR_CLNT_HELLO_A; 57355714Skris 57455714Skris if (type == 3) 57555714Skris { 57655714Skris /* put the 'n' bytes we have read into the input buffer 57755714Skris * for SSLv3 */ 57855714Skris s->rstate=SSL_ST_READ_HEADER; 57955714Skris s->packet_length=n; 58055714Skris s->packet= &(s->s3->rbuf.buf[0]); 58155714Skris memcpy(s->packet,buf,n); 58255714Skris s->s3->rbuf.left=n; 58355714Skris s->s3->rbuf.offset=0; 58455714Skris } 58555714Skris else 58655714Skris { 58755714Skris s->packet_length=0; 58855714Skris s->s3->rbuf.left=0; 58955714Skris s->s3->rbuf.offset=0; 59055714Skris } 59159194Skris#if 0 /* ssl3_get_client_hello does this */ 59255714Skris s->client_version=(v[0]<<8)|v[1]; 59359194Skris#endif 59455714Skris s->handshake_func=s->method->ssl_accept; 59555714Skris } 59655714Skris 59755714Skris if ((type < 1) || (type > 3)) 59855714Skris { 59955714Skris /* bad, very bad */ 60055714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL); 60155714Skris goto err; 60255714Skris } 60355714Skris s->init_num=0; 60455714Skris 60568654Skris if (buf != buf_space) OPENSSL_free(buf); 60655714Skris return(SSL_accept(s)); 60755714Skriserr: 60868654Skris if (buf != buf_space) OPENSSL_free(buf); 60955714Skris return(-1); 61055714Skris } 611