s23_srvr.c revision 110007
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 12755714Skris if (ver == SSL3_VERSION) 12855714Skris return(SSLv3_server_method()); 12955714Skris else if (ver == TLS1_VERSION) 13055714Skris return(TLSv1_server_method()); 13155714Skris else 13255714Skris return(NULL); 13355714Skris } 13455714Skris 13555714SkrisSSL_METHOD *SSLv23_server_method(void) 13655714Skris { 13755714Skris static int init=1; 13855714Skris static SSL_METHOD SSLv23_server_data; 13955714Skris 14055714Skris if (init) 14155714Skris { 142110007Smarkm CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD); 143110007Smarkm 144110007Smarkm if (init) 145110007Smarkm { 146110007Smarkm memcpy((char *)&SSLv23_server_data, 147110007Smarkm (char *)sslv23_base_method(),sizeof(SSL_METHOD)); 148110007Smarkm SSLv23_server_data.ssl_accept=ssl23_accept; 149110007Smarkm SSLv23_server_data.get_ssl_method=ssl23_get_server_method; 150110007Smarkm init=0; 151110007Smarkm } 152110007Smarkm 153110007Smarkm CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD); 15455714Skris } 15555714Skris return(&SSLv23_server_data); 15655714Skris } 15755714Skris 15855714Skrisint ssl23_accept(SSL *s) 15955714Skris { 16055714Skris BUF_MEM *buf; 16155714Skris unsigned long Time=time(NULL); 162110007Smarkm void (*cb)(const SSL *ssl,int type,int val)=NULL; 16355714Skris int ret= -1; 16455714Skris int new_state,state; 16555714Skris 16659194Skris RAND_add(&Time,sizeof(Time),0); 16755714Skris ERR_clear_error(); 16855714Skris clear_sys_error(); 16955714Skris 17055714Skris if (s->info_callback != NULL) 17155714Skris cb=s->info_callback; 17255714Skris else if (s->ctx->info_callback != NULL) 17355714Skris cb=s->ctx->info_callback; 17455714Skris 17589840Skris s->in_handshake++; 17655714Skris if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 17755714Skris 17855714Skris for (;;) 17955714Skris { 18055714Skris state=s->state; 18155714Skris 18255714Skris switch(s->state) 18355714Skris { 18455714Skris case SSL_ST_BEFORE: 18555714Skris case SSL_ST_ACCEPT: 18655714Skris case SSL_ST_BEFORE|SSL_ST_ACCEPT: 18755714Skris case SSL_ST_OK|SSL_ST_ACCEPT: 18855714Skris 18955714Skris s->server=1; 19055714Skris if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 19155714Skris 19255714Skris /* s->version=SSL3_VERSION; */ 19355714Skris s->type=SSL_ST_ACCEPT; 19455714Skris 19555714Skris if (s->init_buf == NULL) 19655714Skris { 19755714Skris if ((buf=BUF_MEM_new()) == NULL) 19855714Skris { 19955714Skris ret= -1; 20055714Skris goto end; 20155714Skris } 20255714Skris if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 20355714Skris { 20455714Skris ret= -1; 20555714Skris goto end; 20655714Skris } 20755714Skris s->init_buf=buf; 20855714Skris } 20955714Skris 21055714Skris ssl3_init_finished_mac(s); 21155714Skris 21255714Skris s->state=SSL23_ST_SR_CLNT_HELLO_A; 21355714Skris s->ctx->stats.sess_accept++; 21455714Skris s->init_num=0; 21555714Skris break; 21655714Skris 21755714Skris case SSL23_ST_SR_CLNT_HELLO_A: 21855714Skris case SSL23_ST_SR_CLNT_HELLO_B: 21955714Skris 22055714Skris s->shutdown=0; 22155714Skris ret=ssl23_get_client_hello(s); 22255714Skris if (ret >= 0) cb=NULL; 22355714Skris goto end; 22455714Skris /* break; */ 22555714Skris 22655714Skris default: 22755714Skris SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE); 22855714Skris ret= -1; 22955714Skris goto end; 23055714Skris /* break; */ 23155714Skris } 23255714Skris 23355714Skris if ((cb != NULL) && (s->state != state)) 23455714Skris { 23555714Skris new_state=s->state; 23655714Skris s->state=state; 23755714Skris cb(s,SSL_CB_ACCEPT_LOOP,1); 23855714Skris s->state=new_state; 23955714Skris } 24055714Skris } 24155714Skrisend: 24289840Skris s->in_handshake--; 24355714Skris if (cb != NULL) 24455714Skris cb(s,SSL_CB_ACCEPT_EXIT,ret); 24555714Skris return(ret); 24655714Skris } 24755714Skris 24855714Skris 24955714Skrisint ssl23_get_client_hello(SSL *s) 25055714Skris { 25159194Skris char buf_space[11]; /* Request this many bytes in initial read. 25259194Skris * We can detect SSL 3.0/TLS 1.0 Client Hellos 25359194Skris * ('type == 3') correctly only when the following 25459194Skris * is in a single record, which is not guaranteed by 25559194Skris * the protocol specification: 25659194Skris * Byte Content 25759194Skris * 0 type \ 25859194Skris * 1/2 version > record header 25959194Skris * 3/4 length / 26059194Skris * 5 msg_type \ 26159194Skris * 6-8 length > Client Hello message 26259194Skris * 9/10 client_version / 26359194Skris */ 26455714Skris char *buf= &(buf_space[0]); 265110007Smarkm unsigned char *p,*d,*d_len,*dd; 26655714Skris unsigned int i; 26755714Skris unsigned int csl,sil,cl; 26859194Skris int n=0,j; 26959194Skris int type=0; 27055714Skris int v[2]; 271110007Smarkm#ifndef OPENSSL_NO_RSA 27259194Skris int use_sslv2_strong=0; 27359194Skris#endif 27455714Skris 27555714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_A) 27655714Skris { 27759194Skris /* read the initial header */ 27859194Skris v[0]=v[1]=0; 27959194Skris 28055714Skris if (!ssl3_setup_buffers(s)) goto err; 28155714Skris 28259194Skris n=ssl23_read_bytes(s, sizeof buf_space); 28359194Skris if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */ 28455714Skris 28555714Skris p=s->packet; 28655714Skris 28755714Skris memcpy(buf,p,n); 28855714Skris 28955714Skris if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) 29055714Skris { 29159194Skris /* 29259194Skris * SSLv2 header 29359194Skris */ 29455714Skris if ((p[3] == 0x00) && (p[4] == 0x02)) 29555714Skris { 29655714Skris v[0]=p[3]; v[1]=p[4]; 29755714Skris /* SSLv2 */ 29855714Skris if (!(s->options & SSL_OP_NO_SSLv2)) 29955714Skris type=1; 30055714Skris } 30155714Skris else if (p[3] == SSL3_VERSION_MAJOR) 30255714Skris { 30355714Skris v[0]=p[3]; v[1]=p[4]; 30455714Skris /* SSLv3/TLSv1 */ 30555714Skris if (p[4] >= TLS1_VERSION_MINOR) 30655714Skris { 30755714Skris if (!(s->options & SSL_OP_NO_TLSv1)) 30855714Skris { 30959194Skris s->version=TLS1_VERSION; 31059194Skris /* type=2; */ /* done later to survive restarts */ 31155714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 31255714Skris } 31355714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 31455714Skris { 31559194Skris s->version=SSL3_VERSION; 31659194Skris /* type=2; */ 31755714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 31855714Skris } 31955714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 32055714Skris { 32155714Skris type=1; 32255714Skris } 32355714Skris } 32455714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 32559194Skris { 32659194Skris s->version=SSL3_VERSION; 32759194Skris /* type=2; */ 32855714Skris s->state=SSL23_ST_SR_CLNT_HELLO_B; 32959194Skris } 33055714Skris else if (!(s->options & SSL_OP_NO_SSLv2)) 33155714Skris type=1; 33255714Skris 33355714Skris } 33455714Skris } 33555714Skris else if ((p[0] == SSL3_RT_HANDSHAKE) && 33655714Skris (p[1] == SSL3_VERSION_MAJOR) && 33759194Skris (p[5] == SSL3_MT_CLIENT_HELLO) && 33859194Skris ((p[3] == 0 && p[4] < 5 /* silly record length? */) 33959194Skris || (p[9] == p[1]))) 34055714Skris { 34159194Skris /* 34259194Skris * SSLv3 or tls1 header 34359194Skris */ 34459194Skris 34568654Skris v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */ 34659194Skris /* We must look at client_version inside the Client Hello message 34768654Skris * to get the correct minor version. 34868654Skris * However if we have only a pathologically small fragment of the 34989840Skris * Client Hello message, this would be difficult, and we'd have 35089840Skris * to read more records to find out. 35189840Skris * No known SSL 3.0 client fragments ClientHello like this, 35289840Skris * so we simply assume TLS 1.0 to avoid protocol version downgrade 35389840Skris * attacks. */ 35459194Skris if (p[3] == 0 && p[4] < 6) 35568654Skris { 35689840Skris#if 0 35768654Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL); 35868654Skris goto err; 35989840Skris#else 36089840Skris v[1] = TLS1_VERSION_MINOR; 36189840Skris#endif 36268654Skris } 36389840Skris else 36489840Skris v[1]=p[10]; /* minor version according to client_version */ 36559194Skris if (v[1] >= TLS1_VERSION_MINOR) 36655714Skris { 36755714Skris if (!(s->options & SSL_OP_NO_TLSv1)) 36855714Skris { 36959194Skris s->version=TLS1_VERSION; 37055714Skris type=3; 37155714Skris } 37255714Skris else if (!(s->options & SSL_OP_NO_SSLv3)) 37359194Skris { 37459194Skris s->version=SSL3_VERSION; 37555714Skris type=3; 37659194Skris } 37755714Skris } 37889840Skris else 37959194Skris { 38089840Skris /* client requests SSL 3.0 */ 38189840Skris if (!(s->options & SSL_OP_NO_SSLv3)) 38289840Skris { 38389840Skris s->version=SSL3_VERSION; 38489840Skris type=3; 38589840Skris } 38689840Skris else if (!(s->options & SSL_OP_NO_TLSv1)) 38789840Skris { 38889840Skris /* we won't be able to use TLS of course, 38989840Skris * but this will send an appropriate alert */ 39089840Skris s->version=TLS1_VERSION; 39189840Skris type=3; 39289840Skris } 39359194Skris } 39455714Skris } 39555714Skris else if ((strncmp("GET ", (char *)p,4) == 0) || 39655714Skris (strncmp("POST ",(char *)p,5) == 0) || 39755714Skris (strncmp("HEAD ",(char *)p,5) == 0) || 39855714Skris (strncmp("PUT ", (char *)p,4) == 0)) 39955714Skris { 40055714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST); 40155714Skris goto err; 40255714Skris } 40355714Skris else if (strncmp("CONNECT",(char *)p,7) == 0) 40455714Skris { 40555714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST); 40655714Skris goto err; 40755714Skris } 40855714Skris } 40955714Skris 41055714Skris if (s->state == SSL23_ST_SR_CLNT_HELLO_B) 41155714Skris { 41259194Skris /* we have SSLv3/TLSv1 in an SSLv2 header 41359194Skris * (other cases skip this state) */ 41459194Skris 41555714Skris type=2; 41655714Skris p=s->packet; 41759194Skris v[0] = p[3]; /* == SSL3_VERSION_MAJOR */ 41859194Skris v[1] = p[4]; 41959194Skris 42055714Skris n=((p[0]&0x7f)<<8)|p[1]; 42155714Skris if (n > (1024*4)) 42255714Skris { 42355714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE); 42455714Skris goto err; 42555714Skris } 42655714Skris 42755714Skris j=ssl23_read_bytes(s,n+2); 42855714Skris if (j <= 0) return(j); 42955714Skris 430110007Smarkm ssl3_finish_mac(s, s->packet+2, s->packet_length-2); 431110007Smarkm if (s->msg_callback) 432110007Smarkm s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */ 43355714Skris 43455714Skris p=s->packet; 43555714Skris p+=5; 43655714Skris n2s(p,csl); 43755714Skris n2s(p,sil); 43855714Skris n2s(p,cl); 43955714Skris d=(unsigned char *)s->init_buf->data; 44055714Skris if ((csl+sil+cl+11) != s->packet_length) 44155714Skris { 44255714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH); 44355714Skris goto err; 44455714Skris } 44555714Skris 446110007Smarkm /* record header: msg_type ... */ 447110007Smarkm *(d++) = SSL3_MT_CLIENT_HELLO; 448110007Smarkm /* ... and length (actual value will be written later) */ 449110007Smarkm d_len = d; 450110007Smarkm d += 3; 451110007Smarkm 452110007Smarkm /* client_version */ 45359194Skris *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */ 45459194Skris *(d++) = v[1]; 45555714Skris 45655714Skris /* lets populate the random area */ 45759194Skris /* get the challenge_length */ 45855714Skris i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl; 45955714Skris memset(d,0,SSL3_RANDOM_SIZE); 46055714Skris memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i); 46155714Skris d+=SSL3_RANDOM_SIZE; 46255714Skris 46355714Skris /* no session-id reuse */ 46455714Skris *(d++)=0; 46555714Skris 46655714Skris /* ciphers */ 46755714Skris j=0; 46855714Skris dd=d; 46955714Skris d+=2; 47055714Skris for (i=0; i<csl; i+=3) 47155714Skris { 47255714Skris if (p[i] != 0) continue; 47355714Skris *(d++)=p[i+1]; 47455714Skris *(d++)=p[i+2]; 47555714Skris j+=2; 47655714Skris } 47755714Skris s2n(j,dd); 47855714Skris 47955714Skris /* COMPRESSION */ 48055714Skris *(d++)=1; 48155714Skris *(d++)=0; 48255714Skris 483110007Smarkm i = (d-(unsigned char *)s->init_buf->data) - 4; 484110007Smarkm l2n3((long)i, d_len); 48555714Skris 48655714Skris /* get the data reused from the init_buf */ 48755714Skris s->s3->tmp.reuse_message=1; 48855714Skris s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO; 48955714Skris s->s3->tmp.message_size=i; 49055714Skris } 49155714Skris 49259194Skris /* imaginary new state (for program structure): */ 49359194Skris /* s->state = SSL23_SR_CLNT_HELLO_C */ 49459194Skris 49555714Skris if (type == 1) 49655714Skris { 497110007Smarkm#ifdef OPENSSL_NO_SSL2 49859194Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL); 49959194Skris goto err; 50055949Skris#else 50155714Skris /* we are talking sslv2 */ 50255714Skris /* we need to clean up the SSLv3/TLSv1 setup and put in the 50355714Skris * sslv2 stuff. */ 50455714Skris 50555714Skris if (s->s2 == NULL) 50655714Skris { 50755714Skris if (!ssl2_new(s)) 50855714Skris goto err; 50955714Skris } 51055714Skris else 51155714Skris ssl2_clear(s); 51255714Skris 51355714Skris if (s->s3 != NULL) ssl3_free(s); 51455714Skris 515110007Smarkm if (!BUF_MEM_grow_clean(s->init_buf, 51655714Skris SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) 51755714Skris { 51855714Skris goto err; 51955714Skris } 52055714Skris 52155714Skris s->state=SSL2_ST_GET_CLIENT_HELLO_A; 52255714Skris if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) || 52368654Skris use_sslv2_strong || 52468654Skris (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3)) 52555714Skris s->s2->ssl2_rollback=0; 52655714Skris else 52768654Skris /* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0 52868654Skris * (SSL 3.0 draft/RFC 2246, App. E.2) */ 52955714Skris s->s2->ssl2_rollback=1; 53055714Skris 53159194Skris /* setup the n bytes we have read so we get them from 53255714Skris * the sslv2 buffer */ 53355714Skris s->rstate=SSL_ST_READ_HEADER; 53455714Skris s->packet_length=n; 53555714Skris s->packet= &(s->s2->rbuf[0]); 53655714Skris memcpy(s->packet,buf,n); 53755714Skris s->s2->rbuf_left=n; 53855714Skris s->s2->rbuf_offs=0; 53955714Skris 54055714Skris s->method=SSLv2_server_method(); 54155714Skris s->handshake_func=s->method->ssl_accept; 54255949Skris#endif 54355714Skris } 54455714Skris 54555714Skris if ((type == 2) || (type == 3)) 54655714Skris { 54759194Skris /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */ 54855714Skris 54955714Skris if (!ssl_init_wbio_buffer(s,1)) goto err; 55055714Skris 55155714Skris /* we are in this state */ 55255714Skris s->state=SSL3_ST_SR_CLNT_HELLO_A; 55355714Skris 55455714Skris if (type == 3) 55555714Skris { 55655714Skris /* put the 'n' bytes we have read into the input buffer 55755714Skris * for SSLv3 */ 55855714Skris s->rstate=SSL_ST_READ_HEADER; 55955714Skris s->packet_length=n; 56055714Skris s->packet= &(s->s3->rbuf.buf[0]); 56155714Skris memcpy(s->packet,buf,n); 56255714Skris s->s3->rbuf.left=n; 56355714Skris s->s3->rbuf.offset=0; 56455714Skris } 56555714Skris else 56655714Skris { 56755714Skris s->packet_length=0; 56855714Skris s->s3->rbuf.left=0; 56955714Skris s->s3->rbuf.offset=0; 57055714Skris } 57155714Skris 57259194Skris if (s->version == TLS1_VERSION) 57359194Skris s->method = TLSv1_server_method(); 57455714Skris else 57559194Skris s->method = SSLv3_server_method(); 57659194Skris#if 0 /* ssl3_get_client_hello does this */ 57755714Skris s->client_version=(v[0]<<8)|v[1]; 57859194Skris#endif 57955714Skris s->handshake_func=s->method->ssl_accept; 58055714Skris } 58155714Skris 58255714Skris if ((type < 1) || (type > 3)) 58355714Skris { 58455714Skris /* bad, very bad */ 58555714Skris SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL); 58655714Skris goto err; 58755714Skris } 58855714Skris s->init_num=0; 58955714Skris 59068654Skris if (buf != buf_space) OPENSSL_free(buf); 59155714Skris s->first_packet=1; 59255714Skris return(SSL_accept(s)); 59355714Skriserr: 59468654Skris if (buf != buf_space) OPENSSL_free(buf); 59555714Skris return(-1); 59655714Skris } 597