sl@0: /* ssl/s23_srvr.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@openssl.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include <stdio.h>
sl@0: #include "ssl_locl.h"
sl@0: #include <openssl/buffer.h>
sl@0: #include <openssl/rand.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/evp.h>
sl@0: 
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libssl_wsd.h"
sl@0: #endif
sl@0: 
sl@0: #ifdef EMULATOR
sl@0: 
sl@0: 	GET_STATIC_VAR_FROM_TLS(SSLv23_server_method_data,s23_srvr,SSL_METHOD)
sl@0: 	
sl@0: 	#define SSLv23_server_method_data (*GET_WSD_VAR_NAME(SSLv23_server_method_data,s23_srvr,s)())
sl@0: 	
sl@0: #endif
sl@0: 
sl@0: static SSL_METHOD *ssl23_get_server_method(int ver);
sl@0: int ssl23_get_client_hello(SSL *s);
sl@0: static SSL_METHOD *ssl23_get_server_method(int ver)
sl@0: 	{
sl@0: #ifndef OPENSSL_NO_SSL2
sl@0: 	if (ver == SSL2_VERSION)
sl@0: 		return(SSLv2_server_method());
sl@0: #endif
sl@0: 	if (ver == SSL3_VERSION)
sl@0: 		return(SSLv3_server_method());
sl@0: 	else if (ver == TLS1_VERSION)
sl@0: 		return(TLSv1_server_method());
sl@0: 	else
sl@0: 		return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C IMPLEMENT_ssl23_meth_func(SSLv23_server_method,
sl@0: 			ssl23_accept,
sl@0: 			ssl_undefined_function,
sl@0: 			ssl23_get_server_method)
sl@0: 
sl@0: int ssl23_accept(SSL *s)
sl@0: 	{
sl@0: 	BUF_MEM *buf;
sl@0: 	unsigned long Time=(unsigned long)time(NULL);
sl@0: 	void (*cb)(const SSL *ssl,int type,int val)=NULL;
sl@0: 	int ret= -1;
sl@0: 	int new_state,state;
sl@0: 
sl@0: 	RAND_add(&Time,sizeof(Time),0);
sl@0: 	ERR_clear_error();
sl@0: 	clear_sys_error();
sl@0: 
sl@0: 	if (s->info_callback != NULL)
sl@0: 		cb=s->info_callback;
sl@0: 	else if (s->ctx->info_callback != NULL)
sl@0: 		cb=s->ctx->info_callback;
sl@0: 	
sl@0: 	s->in_handshake++;
sl@0: 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
sl@0: 
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		state=s->state;
sl@0: 
sl@0: 		switch(s->state)
sl@0: 			{
sl@0: 		case SSL_ST_BEFORE:
sl@0: 		case SSL_ST_ACCEPT:
sl@0: 		case SSL_ST_BEFORE|SSL_ST_ACCEPT:
sl@0: 		case SSL_ST_OK|SSL_ST_ACCEPT:
sl@0: 
sl@0: 			s->server=1;
sl@0: 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
sl@0: 
sl@0: 			/* s->version=SSL3_VERSION; */
sl@0: 			s->type=SSL_ST_ACCEPT;
sl@0: 
sl@0: 			if (s->init_buf == NULL)
sl@0: 				{
sl@0: 				if ((buf=BUF_MEM_new()) == NULL)
sl@0: 					{
sl@0: 					ret= -1;
sl@0: 					goto end;
sl@0: 					}
sl@0: 				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
sl@0: 					{
sl@0: 					ret= -1;
sl@0: 					goto end;
sl@0: 					}
sl@0: 				s->init_buf=buf;
sl@0: 				}
sl@0: 
sl@0: 			ssl3_init_finished_mac(s);
sl@0: 
sl@0: 			s->state=SSL23_ST_SR_CLNT_HELLO_A;
sl@0: 			s->ctx->stats.sess_accept++;
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL23_ST_SR_CLNT_HELLO_A:
sl@0: 		case SSL23_ST_SR_CLNT_HELLO_B:
sl@0: 
sl@0: 			s->shutdown=0;
sl@0: 			ret=ssl23_get_client_hello(s);
sl@0: 			if (ret >= 0) cb=NULL;
sl@0: 			goto end;
sl@0: 			/* break; */
sl@0: 
sl@0: 		default:
sl@0: 			SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
sl@0: 			ret= -1;
sl@0: 			goto end;
sl@0: 			/* break; */
sl@0: 			}
sl@0: 
sl@0: 		if ((cb != NULL) && (s->state != state))
sl@0: 			{
sl@0: 			new_state=s->state;
sl@0: 			s->state=state;
sl@0: 			cb(s,SSL_CB_ACCEPT_LOOP,1);
sl@0: 			s->state=new_state;
sl@0: 			}
sl@0: 		}
sl@0: end:
sl@0: 	s->in_handshake--;
sl@0: 	if (cb != NULL)
sl@0: 		cb(s,SSL_CB_ACCEPT_EXIT,ret);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: int ssl23_get_client_hello(SSL *s)
sl@0: 	{
sl@0: 	char buf_space[11]; /* Request this many bytes in initial read.
sl@0: 	                     * We can detect SSL 3.0/TLS 1.0 Client Hellos
sl@0: 	                     * ('type == 3') correctly only when the following
sl@0: 	                     * is in a single record, which is not guaranteed by
sl@0: 	                     * the protocol specification:
sl@0: 	                     * Byte  Content
sl@0: 	                     *  0     type            \
sl@0: 	                     *  1/2   version          > record header
sl@0: 	                     *  3/4   length          /
sl@0: 	                     *  5     msg_type        \
sl@0: 	                     *  6-8   length           > Client Hello message
sl@0: 	                     *  9/10  client_version  /
sl@0: 	                     */
sl@0: 	char *buf= &(buf_space[0]);
sl@0: 	unsigned char *p,*d,*d_len,*dd;
sl@0: 	unsigned int i;
sl@0: 	unsigned int csl,sil,cl;
sl@0: 	int n=0,j;
sl@0: 	int type=0;
sl@0: 	int v[2];
sl@0: 
sl@0: 	if (s->state ==	SSL23_ST_SR_CLNT_HELLO_A)
sl@0: 		{
sl@0: 		/* read the initial header */
sl@0: 		v[0]=v[1]=0;
sl@0: 
sl@0: 		if (!ssl3_setup_buffers(s)) goto err;
sl@0: 
sl@0: 		n=ssl23_read_bytes(s, sizeof buf_space);
sl@0: 		if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
sl@0: 
sl@0: 		p=s->packet;
sl@0: 
sl@0: 		memcpy(buf,p,n);
sl@0: 
sl@0: 		if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
sl@0: 			{
sl@0: 			/*
sl@0: 			 * SSLv2 header
sl@0: 			 */
sl@0: 			if ((p[3] == 0x00) && (p[4] == 0x02))
sl@0: 				{
sl@0: 				v[0]=p[3]; v[1]=p[4];
sl@0: 				/* SSLv2 */
sl@0: 				if (!(s->options & SSL_OP_NO_SSLv2))
sl@0: 					type=1;
sl@0: 				}
sl@0: 			else if (p[3] == SSL3_VERSION_MAJOR)
sl@0: 				{
sl@0: 				v[0]=p[3]; v[1]=p[4];
sl@0: 				/* SSLv3/TLSv1 */
sl@0: 				if (p[4] >= TLS1_VERSION_MINOR)
sl@0: 					{
sl@0: 					if (!(s->options & SSL_OP_NO_TLSv1))
sl@0: 						{
sl@0: 						s->version=TLS1_VERSION;
sl@0: 						/* type=2; */ /* done later to survive restarts */
sl@0: 						s->state=SSL23_ST_SR_CLNT_HELLO_B;
sl@0: 						}
sl@0: 					else if (!(s->options & SSL_OP_NO_SSLv3))
sl@0: 						{
sl@0: 						s->version=SSL3_VERSION;
sl@0: 						/* type=2; */
sl@0: 						s->state=SSL23_ST_SR_CLNT_HELLO_B;
sl@0: 						}
sl@0: 					else if (!(s->options & SSL_OP_NO_SSLv2))
sl@0: 						{
sl@0: 						type=1;
sl@0: 						}
sl@0: 					}
sl@0: 				else if (!(s->options & SSL_OP_NO_SSLv3))
sl@0: 					{
sl@0: 					s->version=SSL3_VERSION;
sl@0: 					/* type=2; */
sl@0: 					s->state=SSL23_ST_SR_CLNT_HELLO_B;
sl@0: 					}
sl@0: 				else if (!(s->options & SSL_OP_NO_SSLv2))
sl@0: 					type=1;
sl@0: 
sl@0: 				}
sl@0: 			}
sl@0: 		else if ((p[0] == SSL3_RT_HANDSHAKE) &&
sl@0: 			 (p[1] == SSL3_VERSION_MAJOR) &&
sl@0: 			 (p[5] == SSL3_MT_CLIENT_HELLO) &&
sl@0: 			 ((p[3] == 0 && p[4] < 5 /* silly record length? */)
sl@0: 				|| (p[9] == p[1])))
sl@0: 			{
sl@0: 			/*
sl@0: 			 * SSLv3 or tls1 header
sl@0: 			 */
sl@0: 			
sl@0: 			v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
sl@0: 			/* We must look at client_version inside the Client Hello message
sl@0: 			 * to get the correct minor version.
sl@0: 			 * However if we have only a pathologically small fragment of the
sl@0: 			 * Client Hello message, this would be difficult, and we'd have
sl@0: 			 * to read more records to find out.
sl@0: 			 * No known SSL 3.0 client fragments ClientHello like this,
sl@0: 			 * so we simply assume TLS 1.0 to avoid protocol version downgrade
sl@0: 			 * attacks. */
sl@0: 			if (p[3] == 0 && p[4] < 6)
sl@0: 				{
sl@0: #if 0
sl@0: 				SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
sl@0: 				goto err;
sl@0: #else
sl@0: 				v[1] = TLS1_VERSION_MINOR;
sl@0: #endif
sl@0: 				}
sl@0: 			else
sl@0: 				v[1]=p[10]; /* minor version according to client_version */
sl@0: 			if (v[1] >= TLS1_VERSION_MINOR)
sl@0: 				{
sl@0: 				if (!(s->options & SSL_OP_NO_TLSv1))
sl@0: 					{
sl@0: 					s->version=TLS1_VERSION;
sl@0: 					type=3;
sl@0: 					}
sl@0: 				else if (!(s->options & SSL_OP_NO_SSLv3))
sl@0: 					{
sl@0: 					s->version=SSL3_VERSION;
sl@0: 					type=3;
sl@0: 					}
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				/* client requests SSL 3.0 */
sl@0: 				if (!(s->options & SSL_OP_NO_SSLv3))
sl@0: 					{
sl@0: 					s->version=SSL3_VERSION;
sl@0: 					type=3;
sl@0: 					}
sl@0: 				else if (!(s->options & SSL_OP_NO_TLSv1))
sl@0: 					{
sl@0: 					/* we won't be able to use TLS of course,
sl@0: 					 * but this will send an appropriate alert */
sl@0: 					s->version=TLS1_VERSION;
sl@0: 					type=3;
sl@0: 					}
sl@0: 				}
sl@0: 			}
sl@0: 		else if ((strncmp("GET ", (char *)p,4) == 0) ||
sl@0: 			 (strncmp("POST ",(char *)p,5) == 0) ||
sl@0: 			 (strncmp("HEAD ",(char *)p,5) == 0) ||
sl@0: 			 (strncmp("PUT ", (char *)p,4) == 0))
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		else if (strncmp("CONNECT",(char *)p,7) == 0)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
sl@0: 		{
sl@0: 		/* we have SSLv3/TLSv1 in an SSLv2 header
sl@0: 		 * (other cases skip this state) */
sl@0: 
sl@0: 		type=2;
sl@0: 		p=s->packet;
sl@0: 		v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
sl@0: 		v[1] = p[4];
sl@0: 
sl@0: 		n=((p[0]&0x7f)<<8)|p[1];
sl@0: 		if (n > (1024*4))
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		j=ssl23_read_bytes(s,n+2);
sl@0: 		if (j <= 0) return(j);
sl@0: 
sl@0: 		ssl3_finish_mac(s, s->packet+2, s->packet_length-2);
sl@0: 		if (s->msg_callback)
sl@0: 			s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
sl@0: 
sl@0: 		p=s->packet;
sl@0: 		p+=5;
sl@0: 		n2s(p,csl);
sl@0: 		n2s(p,sil);
sl@0: 		n2s(p,cl);
sl@0: 		d=(unsigned char *)s->init_buf->data;
sl@0: 		if ((csl+sil+cl+11) != s->packet_length)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		/* record header: msg_type ... */
sl@0: 		*(d++) = SSL3_MT_CLIENT_HELLO;
sl@0: 		/* ... and length (actual value will be written later) */
sl@0: 		d_len = d;
sl@0: 		d += 3;
sl@0: 
sl@0: 		/* client_version */
sl@0: 		*(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
sl@0: 		*(d++) = v[1];
sl@0: 
sl@0: 		/* lets populate the random area */
sl@0: 		/* get the challenge_length */
sl@0: 		i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
sl@0: 		memset(d,0,SSL3_RANDOM_SIZE);
sl@0: 		memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
sl@0: 		d+=SSL3_RANDOM_SIZE;
sl@0: 
sl@0: 		/* no session-id reuse */
sl@0: 		*(d++)=0;
sl@0: 
sl@0: 		/* ciphers */
sl@0: 		j=0;
sl@0: 		dd=d;
sl@0: 		d+=2;
sl@0: 		for (i=0; i<csl; i+=3)
sl@0: 			{
sl@0: 			if (p[i] != 0) continue;
sl@0: 			*(d++)=p[i+1];
sl@0: 			*(d++)=p[i+2];
sl@0: 			j+=2;
sl@0: 			}
sl@0: 		s2n(j,dd);
sl@0: 
sl@0: 		/* COMPRESSION */
sl@0: 		*(d++)=1;
sl@0: 		*(d++)=0;
sl@0: 		
sl@0: 		i = (d-(unsigned char *)s->init_buf->data) - 4;
sl@0: 		l2n3((long)i, d_len);
sl@0: 
sl@0: 		/* get the data reused from the init_buf */
sl@0: 		s->s3->tmp.reuse_message=1;
sl@0: 		s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
sl@0: 		s->s3->tmp.message_size=i;
sl@0: 		}
sl@0: 
sl@0: 	/* imaginary new state (for program structure): */
sl@0: 	/* s->state = SSL23_SR_CLNT_HELLO_C */
sl@0: 
sl@0: 	if (type == 1)
sl@0: 		{
sl@0: #ifdef OPENSSL_NO_SSL2
sl@0: 		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
sl@0: 		goto err;
sl@0: #else
sl@0: 		/* we are talking sslv2 */
sl@0: 		/* we need to clean up the SSLv3/TLSv1 setup and put in the
sl@0: 		 * sslv2 stuff. */
sl@0: 
sl@0: 		if (s->s2 == NULL)
sl@0: 			{
sl@0: 			if (!ssl2_new(s))
sl@0: 				goto err;
sl@0: 			}
sl@0: 		else
sl@0: 			ssl2_clear(s);
sl@0: 
sl@0: 		if (s->s3 != NULL) ssl3_free(s);
sl@0: 
sl@0: 		if (!BUF_MEM_grow_clean(s->init_buf,
sl@0: 			SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
sl@0: 			{
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		s->state=SSL2_ST_GET_CLIENT_HELLO_A;
sl@0: 		if (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3)
sl@0: 			s->s2->ssl2_rollback=0;
sl@0: 		else
sl@0: 			/* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0
sl@0: 			 * (SSL 3.0 draft/RFC 2246, App. E.2) */
sl@0: 			s->s2->ssl2_rollback=1;
sl@0: 
sl@0: 		/* setup the n bytes we have read so we get them from
sl@0: 		 * the sslv2 buffer */
sl@0: 		s->rstate=SSL_ST_READ_HEADER;
sl@0: 		s->packet_length=n;
sl@0: 		s->packet= &(s->s2->rbuf[0]);
sl@0: 		memcpy(s->packet,buf,n);
sl@0: 		s->s2->rbuf_left=n;
sl@0: 		s->s2->rbuf_offs=0;
sl@0: 
sl@0: 		s->method=SSLv2_server_method();
sl@0: 		s->handshake_func=s->method->ssl_accept;
sl@0: #endif
sl@0: 		}
sl@0: 
sl@0: 	if ((type == 2) || (type == 3))
sl@0: 		{
sl@0: 		/* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
sl@0: 
sl@0: 		if (!ssl_init_wbio_buffer(s,1)) goto err;
sl@0: 
sl@0: 		/* we are in this state */
sl@0: 		s->state=SSL3_ST_SR_CLNT_HELLO_A;
sl@0: 
sl@0: 		if (type == 3)
sl@0: 			{
sl@0: 			/* put the 'n' bytes we have read into the input buffer
sl@0: 			 * for SSLv3 */
sl@0: 			s->rstate=SSL_ST_READ_HEADER;
sl@0: 			s->packet_length=n;
sl@0: 			s->packet= &(s->s3->rbuf.buf[0]);
sl@0: 			memcpy(s->packet,buf,n);
sl@0: 			s->s3->rbuf.left=n;
sl@0: 			s->s3->rbuf.offset=0;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			s->packet_length=0;
sl@0: 			s->s3->rbuf.left=0;
sl@0: 			s->s3->rbuf.offset=0;
sl@0: 			}
sl@0: 
sl@0: 		if (s->version == TLS1_VERSION)
sl@0: 			s->method = TLSv1_server_method();
sl@0: 		else
sl@0: 			s->method = SSLv3_server_method();
sl@0: #if 0 /* ssl3_get_client_hello does this */
sl@0: 		s->client_version=(v[0]<<8)|v[1];
sl@0: #endif
sl@0: 		s->handshake_func=s->method->ssl_accept;
sl@0: 		}
sl@0: 	
sl@0: 	if ((type < 1) || (type > 3))
sl@0: 		{
sl@0: 		/* bad, very bad */
sl@0: 		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
sl@0: 		goto err;
sl@0: 		}
sl@0: 	s->init_num=0;
sl@0: 
sl@0: 	if (buf != buf_space) OPENSSL_free(buf);
sl@0: 	return(SSL_accept(s));
sl@0: err:
sl@0: 	if (buf != buf_space) OPENSSL_free(buf);
sl@0: 	return(-1);
sl@0: 	}