[thirdparty/openssl.git] / ssl / s23_srvr.c

/* ssl/s23_srvr.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>

static const SSL_METHOD *ssl23_get_server_method(int ver);
int ssl23_get_client_hello(SSL *s);
static const SSL_METHOD *ssl23_get_server_method(int ver)
	{
#ifndef OPENSSL_NO_SSL3
	if (ver == SSL3_VERSION)
		return(SSLv3_server_method());
#endif
	if (ver == TLS1_VERSION)
		return(TLSv1_server_method());
	else if (ver == TLS1_1_VERSION)
		return(TLSv1_1_server_method());
	else if (ver == TLS1_2_VERSION)
		return(TLSv1_2_server_method());
	else
		return(NULL);
	}

IMPLEMENT_ssl23_meth_func(SSLv23_server_method,
			ssl23_accept,
			ssl_undefined_function,
			ssl23_get_server_method)

int ssl23_accept(SSL *s)
	{
	BUF_MEM *buf;
	unsigned long Time=(unsigned long)time(NULL);
	void (*cb)(const SSL *ssl,int type,int val)=NULL;
	int ret= -1;
	int new_state,state;

	RAND_add(&Time,sizeof(Time),0);
	ERR_clear_error();
	clear_sys_error();

	if (s->info_callback != NULL)
		cb=s->info_callback;
	else if (s->ctx->info_callback != NULL)
		cb=s->ctx->info_callback;
	
	s->in_handshake++;
	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 

	for (;;)
		{
		state=s->state;

		switch(s->state)
			{
		case SSL_ST_BEFORE:
		case SSL_ST_ACCEPT:
		case SSL_ST_BEFORE|SSL_ST_ACCEPT:
		case SSL_ST_OK|SSL_ST_ACCEPT:

			s->server=1;
			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

			/* s->version=SSL3_VERSION; */
			s->type=SSL_ST_ACCEPT;

			if (s->init_buf == NULL)
				{
				if ((buf=BUF_MEM_new()) == NULL)
					{
					ret= -1;
					goto end;
					}
				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
					{
					BUF_MEM_free(buf);
					ret= -1;
					goto end;
					}
				s->init_buf=buf;
				}

			ssl3_init_finished_mac(s);

			s->state=SSL23_ST_SR_CLNT_HELLO_A;
			s->ctx->stats.sess_accept++;
			s->init_num=0;
			break;

		case SSL23_ST_SR_CLNT_HELLO_A:
		case SSL23_ST_SR_CLNT_HELLO_B:

			s->shutdown=0;
			ret=ssl23_get_client_hello(s);
			if (ret >= 0) cb=NULL;
			goto end;
			/* break; */

		default:
			SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
			ret= -1;
			goto end;
			/* break; */
			}

		if ((cb != NULL) && (s->state != state))
			{
			new_state=s->state;
			s->state=state;
			cb(s,SSL_CB_ACCEPT_LOOP,1);
			s->state=new_state;
			}
		}
end:
	s->in_handshake--;
	if (cb != NULL)
		cb(s,SSL_CB_ACCEPT_EXIT,ret);
	return(ret);
	}

int ssl23_get_client_hello(SSL *s)
	{
	char buf_space[11]; /* Request this many bytes in initial read.
	                     * We can detect SSL 3.0/TLS 1.0 Client Hellos
	                     * ('type == 3') correctly only when the following
	                     * is in a single record, which is not guaranteed by
	                     * the protocol specification:
	                     * Byte  Content
	                     *  0     type            \
	                     *  1/2   version          > record header
	                     *  3/4   length          /
	                     *  5     msg_type        \
	                     *  6-8   length           > Client Hello message
	                     *  9/10  client_version  /
	                     */
	char *buf= &(buf_space[0]);
	unsigned char *p,*d,*d_len,*dd;
	unsigned int i;
	unsigned int csl,sil,cl;
	int n=0,j;
	int type=0;
	int v[2];

	if (s->state ==	SSL23_ST_SR_CLNT_HELLO_A)
		{
		/* read the initial header */
		v[0]=v[1]=0;

		if (!ssl3_setup_buffers(s)) goto err;

		n=ssl23_read_bytes(s, sizeof buf_space);
		if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */

		p=s->packet;

		memcpy(buf,p,n);

		if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
			{
			/*
			 * SSLv2 header
			 */
			if ((p[3] == 0x00) && (p[4] == 0x02))
				{
				v[0]=p[3]; v[1]=p[4];
				/* SSLv2 */
				}
			else if (p[3] == SSL3_VERSION_MAJOR)
				{
				v[0]=p[3]; v[1]=p[4];
				/* SSLv3/TLSv1 */
				if (p[4] >= TLS1_VERSION_MINOR)
					{
					if (p[4] >= TLS1_2_VERSION_MINOR &&
					   !(s->options & SSL_OP_NO_TLSv1_2))
						{
						s->version=TLS1_2_VERSION;
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					else if (p[4] >= TLS1_1_VERSION_MINOR &&
					   !(s->options & SSL_OP_NO_TLSv1_1))
						{
						s->version=TLS1_1_VERSION;
						/* type=2; */ /* done later to survive restarts */
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					else if (!(s->options & SSL_OP_NO_TLSv1))
						{
						s->version=TLS1_VERSION;
						/* type=2; */ /* done later to survive restarts */
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					else if (!(s->options & SSL_OP_NO_SSLv3))
						{
						s->version=SSL3_VERSION;
						/* type=2; */
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					}
				else if (!(s->options & SSL_OP_NO_SSLv3))
					{
					s->version=SSL3_VERSION;
					/* type=2; */
					s->state=SSL23_ST_SR_CLNT_HELLO_B;
					}
				}
			}
		/* p[4] < 5 ... silly record length? */
		else if ((p[0] == SSL3_RT_HANDSHAKE) &&
			 (p[1] == SSL3_VERSION_MAJOR) &&
			 (p[5] == SSL3_MT_CLIENT_HELLO) &&
			 ((p[3] == 0 && p[4] < 5)
				|| (p[9] >= p[1])))
			{
			/*
			 * SSLv3 or tls1 header
			 */
			
			v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
			/* We must look at client_version inside the Client Hello message
			 * to get the correct minor version.
			 * However if we have only a pathologically small fragment of the
			 * Client Hello message, this would be difficult, and we'd have
			 * to read more records to find out.
			 * No known SSL 3.0 client fragments ClientHello like this,
			 * so we simply reject such connections to avoid
			 * protocol version downgrade attacks. */
			if (p[3] == 0 && p[4] < 6)
				{
				SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
				goto err;
				}
			/* if major version number > 3 set minor to a value
			 * which will use the highest version 3 we support.
			 * If TLS 2.0 ever appears we will need to revise
			 * this....
			 */
			if (p[9] > SSL3_VERSION_MAJOR)
				v[1]=0xff;
			else
				v[1]=p[10]; /* minor version according to client_version */
			if (v[1] >= TLS1_VERSION_MINOR)
				{
				if (v[1] >= TLS1_2_VERSION_MINOR &&
					!(s->options & SSL_OP_NO_TLSv1_2))
					{
					s->version=TLS1_2_VERSION;
					type=3;
					}
				else if (v[1] >= TLS1_1_VERSION_MINOR &&
					!(s->options & SSL_OP_NO_TLSv1_1))
					{
					s->version=TLS1_1_VERSION;
					type=3;
					}
				else if (!(s->options & SSL_OP_NO_TLSv1))
					{
					s->version=TLS1_VERSION;
					type=3;
					}
				else if (!(s->options & SSL_OP_NO_SSLv3))
					{
					s->version=SSL3_VERSION;
					type=3;
					}
				}
			else
				{
				/* client requests SSL 3.0 */
				if (!(s->options & SSL_OP_NO_SSLv3))
					{
					s->version=SSL3_VERSION;
					type=3;
					}
				else if (!(s->options & SSL_OP_NO_TLSv1))
					{
					/* we won't be able to use TLS of course,
					 * but this will send an appropriate alert */
					s->version=TLS1_VERSION;
					type=3;
					}
				}
			}
		else if ((strncmp("GET ", (char *)p,4) == 0) ||
			 (strncmp("POST ",(char *)p,5) == 0) ||
			 (strncmp("HEAD ",(char *)p,5) == 0) ||
			 (strncmp("PUT ", (char *)p,4) == 0))
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
			goto err;
			}
		else if (strncmp("CONNECT",(char *)p,7) == 0)
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
			goto err;
			}
		}

	/* ensure that TLS_MAX_VERSION is up-to-date */
	OPENSSL_assert(s->version <= TLS_MAX_VERSION);

	if (s->version < TLS1_2_VERSION && tls1_suiteb(s))
		{
		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
				SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
		goto err;
		}

	if (FIPS_mode() && (s->version < TLS1_VERSION))
		{
		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
					SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
		goto err;
		}

	if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
		{
		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_VERSION_TOO_LOW);
		goto err;
		}

	if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
		{
		/* we have SSLv3/TLSv1 in an SSLv2 header
		 * (other cases skip this state) */

		type=2;
		p=s->packet;
		v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
		v[1] = p[4];

		/*-
		 * An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2
		 * header is sent directly on the wire, not wrapped as a TLS
		 * record. It's format is:
		 * Byte  Content
		 * 0-1   msg_length
		 * 2     msg_type
		 * 3-4   version
		 * 5-6   cipher_spec_length
		 * 7-8   session_id_length
		 * 9-10  challenge_length
		 * ...   ...
		 */
		n=((p[0]&0x7f)<<8)|p[1];
		if (n > (1024*4))
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
			goto err;
			}
		if (n < 9)
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
			goto err;
			}

		j=ssl23_read_bytes(s,n+2);
		/* We previously read 11 bytes, so if j > 0, we must have
		 * j == n+2 == s->packet_length. We have at least 11 valid
		 * packet bytes. */
		if (j <= 0) return(j);

		ssl3_finish_mac(s, s->packet+2, s->packet_length-2);

		/* CLIENT-HELLO */
		if (s->msg_callback)
			s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg);

		p=s->packet;
		p+=5;
		n2s(p,csl);
		n2s(p,sil);
		n2s(p,cl);
		d=(unsigned char *)s->init_buf->data;
		if ((csl+sil+cl+11) != s->packet_length) /* We can't have TLS extensions in SSL 2.0 format
		                                          * Client Hello, can we? Error condition should be
		                                          * '>' otherweise */
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
			goto err;
			}

		/* record header: msg_type ... */
		*(d++) = SSL3_MT_CLIENT_HELLO;
		/* ... and length (actual value will be written later) */
		d_len = d;
		d += 3;

		/* client_version */
		*(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
		*(d++) = v[1];

		/* lets populate the random area */
		/* get the challenge_length */
		i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
		memset(d,0,SSL3_RANDOM_SIZE);
		memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
		d+=SSL3_RANDOM_SIZE;

		/* no session-id reuse */
		*(d++)=0;

		/* ciphers */
		j=0;
		dd=d;
		d+=2;
		for (i=0; i<csl; i+=3)
			{
			if (p[i] != 0) continue;
			*(d++)=p[i+1];
			*(d++)=p[i+2];
			j+=2;
			}
		s2n(j,dd);

		/* COMPRESSION */
		*(d++)=1;
		*(d++)=0;
		
#if 0
                /* copy any remaining data with may be extensions */
	        p = p+csl+sil+cl;
		while (p <  s->packet+s->packet_length)
			{
			*(d++)=*(p++);
			}
#endif

		i = (d-(unsigned char *)s->init_buf->data) - 4;
		l2n3((long)i, d_len);

		/* get the data reused from the init_buf */
		s->s3->tmp.reuse_message=1;
		s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
		s->s3->tmp.message_size=i;
		}

	/* imaginary new state (for program structure): */
	/* s->state = SSL23_SR_CLNT_HELLO_C */

	if ((type == 2) || (type == 3))
		{
		/* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
		const SSL_METHOD *new_method;
		new_method = ssl23_get_server_method(s->version);
		if (new_method == NULL)
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
			goto err;
			}
		s->method = new_method;

		if (!ssl_init_wbio_buffer(s,1)) goto err;

		/* we are in this state */
		s->state=SSL3_ST_SR_CLNT_HELLO_A;

		if (type == 3)
			{
			/* put the 'n' bytes we have read into the input buffer
			 * for SSLv3 */
			s->rstate=SSL_ST_READ_HEADER;
			s->packet_length=n;
			if (s->s3->rbuf.buf == NULL)
				if (!ssl3_setup_read_buffer(s))
					goto err;

			s->packet= &(s->s3->rbuf.buf[0]);
			memcpy(s->packet,buf,n);
			s->s3->rbuf.left=n;
			s->s3->rbuf.offset=0;
			}
		else
			{
			s->packet_length=0;
			s->s3->rbuf.left=0;
			s->s3->rbuf.offset=0;
			}
#if 0 /* ssl3_get_client_hello does this */
		s->client_version=(v[0]<<8)|v[1];
#endif
		s->handshake_func=s->method->ssl_accept;
		}
	else
		{
		/* bad, very bad */
		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
		goto err;
		}
	s->init_num=0;

	if (buf != buf_space) OPENSSL_free(buf);
	return(SSL_accept(s));
err:
	if (buf != buf_space) OPENSSL_free(buf);
	return(-1);
	}
Commit	Line	Data
d02b48c6	1	/* ssl/s23_srvr.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
a661b653	58	/* ====================================================================
f1fd4544	59	* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
a661b653 BM	60	*
	61	* Redistribution and use in source and binary forms, with or without
	62	* modification, are permitted provided that the following conditions
	63	* are met:
	64	*
	65	* 1. Redistributions of source code must retain the above copyright
	66	* notice, this list of conditions and the following disclaimer.
	67	*
	68	* 2. Redistributions in binary form must reproduce the above copyright
	69	* notice, this list of conditions and the following disclaimer in
	70	* the documentation and/or other materials provided with the
	71	* distribution.
	72	*
	73	* 3. All advertising materials mentioning features or use of this
	74	* software must display the following acknowledgment:
	75	* "This product includes software developed by the OpenSSL Project
	76	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	77	*
	78	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	79	* endorse or promote products derived from this software without
	80	* prior written permission. For written permission, please contact
	81	* openssl-core@openssl.org.
	82	*
	83	* 5. Products derived from this software may not be called "OpenSSL"
	84	* nor may "OpenSSL" appear in their names without prior written
	85	* permission of the OpenSSL Project.
	86	*
	87	* 6. Redistributions of any form whatsoever must retain the following
	88	* acknowledgment:
	89	* "This product includes software developed by the OpenSSL Project
	90	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	91	*
	92	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	93	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	94	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	95	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	96	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	97	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	98	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	99	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	100	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	101	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	102	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	103	* OF THE POSSIBILITY OF SUCH DAMAGE.
	104	* ====================================================================
	105	*
	106	* This product includes cryptographic software written by Eric Young
	107	* (eay@cryptsoft.com). This product includes software written by Tim
	108	* Hudson (tjh@cryptsoft.com).
	109	*
	110	*/
d02b48c6 RE	111
d02b48c6 RE	112	#include <stdio.h>
7b63c0fa	113	#include "ssl_locl.h"
ec577822 BM	114	#include <openssl/buffer.h>
	115	#include <openssl/rand.h>
	116	#include <openssl/objects.h>
	117	#include <openssl/evp.h>
d02b48c6	118
4ebb342f	119	static const SSL_METHOD *ssl23_get_server_method(int ver);
d02b48c6	120	int ssl23_get_client_hello(SSL *s);
4ebb342f	121	static const SSL_METHOD *ssl23_get_server_method(int ver)
d02b48c6	122	{
62f45cc2	123	#ifndef OPENSSL_NO_SSL3
79df9d62	124	if (ver == SSL3_VERSION)
d02b48c6	125	return(SSLv3_server_method());
62f45cc2 GT	126	#endif
62f45cc2 GT	127	if (ver == TLS1_VERSION)
58964a49	128	return(TLSv1_server_method());
637f374a DSH	129	else if (ver == TLS1_1_VERSION)
637f374a DSH	130	return(TLSv1_1_server_method());
7409d7ad DSH	131	else if (ver == TLS1_2_VERSION)
7409d7ad DSH	132	return(TLSv1_2_server_method());
d02b48c6 RE	133	else
	134	return(NULL);
	135	}
	136
f3b656b2 DSH	137	IMPLEMENT_ssl23_meth_func(SSLv23_server_method,
	138	ssl23_accept,
	139	ssl_undefined_function,
	140	ssl23_get_server_method)
d02b48c6	141
6b691a5c	142	int ssl23_accept(SSL *s)
d02b48c6 RE	143	{
d02b48c6 RE	144	BUF_MEM *buf;
f1fd4544	145	unsigned long Time=(unsigned long)time(NULL);
45d87a1f	146	void (cb)(const SSL ssl,int type,int val)=NULL;
d02b48c6 RE	147	int ret= -1;
	148	int new_state,state;
	149
eb952088	150	RAND_add(&Time,sizeof(Time),0);
d02b48c6	151	ERR_clear_error();
58964a49	152	clear_sys_error();
d02b48c6 RE	153
	154	if (s->info_callback != NULL)
	155	cb=s->info_callback;
	156	else if (s->ctx->info_callback != NULL)
	157	cb=s->ctx->info_callback;
	158
d02b48c6	159	s->in_handshake++;
979689aa	160	if (!SSL_in_init(s) \|\| SSL_in_before(s)) SSL_clear(s);
d02b48c6 RE	161
	162	for (;;)
	163	{
	164	state=s->state;
	165
	166	switch(s->state)
	167	{
	168	case SSL_ST_BEFORE:
	169	case SSL_ST_ACCEPT:
	170	case SSL_ST_BEFORE\|SSL_ST_ACCEPT:
	171	case SSL_ST_OK\|SSL_ST_ACCEPT:
	172
413c4f45	173	s->server=1;
d02b48c6 RE	174	if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
d02b48c6 RE	175
58964a49	176	/* s->version=SSL3_VERSION; */
d02b48c6 RE	177	s->type=SSL_ST_ACCEPT;
	178
	179	if (s->init_buf == NULL)
	180	{
	181	if ((buf=BUF_MEM_new()) == NULL)
	182	{
	183	ret= -1;
	184	goto end;
	185	}
	186	if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
	187	{
24097938	188	BUF_MEM_free(buf);
d02b48c6 RE	189	ret= -1;
	190	goto end;
	191	}
	192	s->init_buf=buf;
	193	}
	194
	195	ssl3_init_finished_mac(s);
	196
	197	s->state=SSL23_ST_SR_CLNT_HELLO_A;
413c4f45	198	s->ctx->stats.sess_accept++;
d02b48c6 RE	199	s->init_num=0;
	200	break;
	201
	202	case SSL23_ST_SR_CLNT_HELLO_A:
	203	case SSL23_ST_SR_CLNT_HELLO_B:
	204
	205	s->shutdown=0;
	206	ret=ssl23_get_client_hello(s);
	207	if (ret >= 0) cb=NULL;
	208	goto end;
dfeab068	209	/* break; */
d02b48c6 RE	210
	211	default:
	212	SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
	213	ret= -1;
	214	goto end;
	215	/* break; */
	216	}
	217
	218	if ((cb != NULL) && (s->state != state))
	219	{
	220	new_state=s->state;
	221	s->state=state;
	222	cb(s,SSL_CB_ACCEPT_LOOP,1);
	223	s->state=new_state;
	224	}
	225	}
	226	end:
ba1c6022	227	s->in_handshake--;
d02b48c6 RE	228	if (cb != NULL)
d02b48c6 RE	229	cb(s,SSL_CB_ACCEPT_EXIT,ret);
d02b48c6 RE	230	return(ret);
	231	}
	232
6b691a5c	233	int ssl23_get_client_hello(SSL *s)
d02b48c6	234	{
c51ae173	235	char buf_space[11]; /* Request this many bytes in initial read.
dab6f095 BM	236	* We can detect SSL 3.0/TLS 1.0 Client Hellos
	237	* ('type == 3') correctly only when the following
	238	* is in a single record, which is not guaranteed by
	239	* the protocol specification:
c51ae173 BM	240	* Byte Content
	241	* 0 type \
	242	* 1/2 version > record header
	243	* 3/4 length /
	244	* 5 msg_type \
	245	* 6-8 length > Client Hello message
	246	* 9/10 client_version /
	247	*/
d02b48c6	248	char *buf= &(buf_space[0]);
48948d53	249	unsigned char p,d,d_len,dd;
d02b48c6 RE	250	unsigned int i;
d02b48c6 RE	251	unsigned int csl,sil,cl;
cb0369d8	252	int n=0,j;
4c5fac4a	253	int type=0;
413c4f45	254	int v[2];
d02b48c6	255
d02b48c6 RE	256	if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
d02b48c6 RE	257	{
de1915e4 BM	258	/* read the initial header */
	259	v[0]=v[1]=0;
	260
d02b48c6 RE	261	if (!ssl3_setup_buffers(s)) goto err;
d02b48c6 RE	262
ba3a6e72 BM	263	n=ssl23_read_bytes(s, sizeof buf_space);
ba3a6e72 BM	264	if (n != sizeof buf_space) return(n); /* n == -1 \|\| n == 0 */
d02b48c6 RE	265
	266	p=s->packet;
	267
	268	memcpy(buf,p,n);
	269
	270	if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
	271	{
074309b7 BM	272	/*
	273	* SSLv2 header
	274	*/
d02b48c6 RE	275	if ((p[3] == 0x00) && (p[4] == 0x02))
d02b48c6 RE	276	{
413c4f45	277	v[0]=p[3]; v[1]=p[4];
d02b48c6	278	/* SSLv2 */
d02b48c6 RE	279	}
	280	else if (p[3] == SSL3_VERSION_MAJOR)
	281	{
413c4f45	282	v[0]=p[3]; v[1]=p[4];
58964a49 RE	283	/* SSLv3/TLSv1 */
	284	if (p[4] >= TLS1_VERSION_MINOR)
	285	{
7409d7ad DSH	286	if (p[4] >= TLS1_2_VERSION_MINOR &&
	287	!(s->options & SSL_OP_NO_TLSv1_2))
	288	{
	289	s->version=TLS1_2_VERSION;
	290	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	291	}
	292	else if (p[4] >= TLS1_1_VERSION_MINOR &&
637f374a DSH	293	!(s->options & SSL_OP_NO_TLSv1_1))
	294	{
	295	s->version=TLS1_1_VERSION;
7409d7ad	296	/* type=2; / / done later to survive restarts */
637f374a DSH	297	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	298	}
	299	else if (!(s->options & SSL_OP_NO_TLSv1))
58964a49	300	{
cb0369d8	301	s->version=TLS1_VERSION;
074309b7	302	/* type=2; / / done later to survive restarts */
58964a49 RE	303	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	304	}
	305	else if (!(s->options & SSL_OP_NO_SSLv3))
	306	{
cb0369d8	307	s->version=SSL3_VERSION;
074309b7	308	/* type=2; */
58964a49 RE	309	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	310	}
	311	}
	312	else if (!(s->options & SSL_OP_NO_SSLv3))
074309b7	313	{
cb0369d8	314	s->version=SSL3_VERSION;
074309b7	315	/* type=2; */
58964a49	316	s->state=SSL23_ST_SR_CLNT_HELLO_B;
074309b7	317	}
d02b48c6 RE	318	}
d02b48c6 RE	319	}
e636e2ac	320	/* p[4] < 5 ... silly record length? */
d02b48c6 RE	321	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
d02b48c6 RE	322	(p[1] == SSL3_VERSION_MAJOR) &&
074309b7	323	(p[5] == SSL3_MT_CLIENT_HELLO) &&
e636e2ac	324	((p[3] == 0 && p[4] < 5)
bd5f21a4	325	\|\| (p[9] >= p[1])))
d02b48c6	326	{
074309b7 BM	327	/*
	328	* SSLv3 or tls1 header
	329	*/
	330
f1192b7f	331	v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
dab6f095	332	/* We must look at client_version inside the Client Hello message
f1192b7f BM	333	* to get the correct minor version.
f1192b7f BM	334	* However if we have only a pathologically small fragment of the
ba1c6022 BM	335	* Client Hello message, this would be difficult, and we'd have
	336	* to read more records to find out.
	337	* No known SSL 3.0 client fragments ClientHello like this,
280b1f1a DB	338	* so we simply reject such connections to avoid
280b1f1a DB	339	* protocol version downgrade attacks. */
dab6f095	340	if (p[3] == 0 && p[4] < 6)
f1192b7f BM	341	{
	342	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
	343	goto err;
	344	}
bd5f21a4 DSH	345	/* if major version number > 3 set minor to a value
	346	* which will use the highest version 3 we support.
	347	* If TLS 2.0 ever appears we will need to revise
	348	* this....
	349	*/
280b1f1a	350	if (p[9] > SSL3_VERSION_MAJOR)
bd5f21a4	351	v[1]=0xff;
ba1c6022 BM	352	else
ba1c6022 BM	353	v[1]=p[10]; /* minor version according to client_version */
f70df1b8	354	if (v[1] >= TLS1_VERSION_MINOR)
58964a49	355	{
7409d7ad DSH	356	if (v[1] >= TLS1_2_VERSION_MINOR &&
	357	!(s->options & SSL_OP_NO_TLSv1_2))
	358	{
	359	s->version=TLS1_2_VERSION;
	360	type=3;
	361	}
	362	else if (v[1] >= TLS1_1_VERSION_MINOR &&
637f374a DSH	363	!(s->options & SSL_OP_NO_TLSv1_1))
	364	{
	365	s->version=TLS1_1_VERSION;
	366	type=3;
	367	}
	368	else if (!(s->options & SSL_OP_NO_TLSv1))
58964a49	369	{
cb0369d8	370	s->version=TLS1_VERSION;
58964a49	371	type=3;
58964a49 RE	372	}
58964a49 RE	373	else if (!(s->options & SSL_OP_NO_SSLv3))
cb0369d8 BM	374	{
cb0369d8 BM	375	s->version=SSL3_VERSION;
58964a49	376	type=3;
cb0369d8	377	}
58964a49	378	}
a661b653	379	else
ac7da000	380	{
a661b653 BM	381	/* client requests SSL 3.0 */
	382	if (!(s->options & SSL_OP_NO_SSLv3))
	383	{
	384	s->version=SSL3_VERSION;
	385	type=3;
	386	}
	387	else if (!(s->options & SSL_OP_NO_TLSv1))
	388	{
	389	/* we won't be able to use TLS of course,
	390	* but this will send an appropriate alert */
	391	s->version=TLS1_VERSION;
	392	type=3;
	393	}
ac7da000	394	}
d02b48c6	395	}
dfeab068 RE	396	else if ((strncmp("GET ", (char *)p,4) == 0) \|\|
	397	(strncmp("POST ",(char *)p,5) == 0) \|\|
	398	(strncmp("HEAD ",(char *)p,5) == 0) \|\|
	399	(strncmp("PUT ", (char *)p,4) == 0))
d02b48c6	400	{
58964a49	401	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
d02b48c6 RE	402	goto err;
d02b48c6 RE	403	}
dfeab068	404	else if (strncmp("CONNECT",(char *)p,7) == 0)
d02b48c6	405	{
58964a49	406	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
d02b48c6 RE	407	goto err;
	408	}
	409	}
	410
cf6da053 BM	411	/* ensure that TLS_MAX_VERSION is up-to-date */
	412	OPENSSL_assert(s->version <= TLS_MAX_VERSION);
	413
2ea80354 DSH	414	if (s->version < TLS1_2_VERSION && tls1_suiteb(s))
	415	{
	416	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
	417	SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
	418	goto err;
	419	}
	420
086e32a6 DSH	421	if (FIPS_mode() && (s->version < TLS1_VERSION))
	422	{
	423	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,
	424	SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
	425	goto err;
	426	}
086e32a6	427
b362ccab DSH	428	if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
	429	{
	430	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_VERSION_TOO_LOW);
	431	goto err;
	432	}
	433
d02b48c6 RE	434	if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
d02b48c6 RE	435	{
cb0369d8 BM	436	/* we have SSLv3/TLSv1 in an SSLv2 header
	437	* (other cases skip this state) */
	438
d02b48c6 RE	439	type=2;
d02b48c6 RE	440	p=s->packet;
cb0369d8	441	v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
de1915e4	442	v[1] = p[4];
cb0369d8	443
1d97c843 TH	444	/*-
1d97c843 TH	445	* An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2
280b1f1a DB	446	* header is sent directly on the wire, not wrapped as a TLS
	447	* record. It's format is:
	448	* Byte Content
	449	* 0-1 msg_length
	450	* 2 msg_type
	451	* 3-4 version
	452	* 5-6 cipher_spec_length
	453	* 7-8 session_id_length
	454	* 9-10 challenge_length
	455	* ... ...
	456	*/
d02b48c6 RE	457	n=((p[0]&0x7f)<<8)\|p[1];
	458	if (n > (1024*4))
	459	{
	460	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
	461	goto err;
	462	}
280b1f1a DB	463	if (n < 9)
	464	{
	465	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
	466	goto err;
	467	}
d02b48c6 RE	468
d02b48c6 RE	469	j=ssl23_read_bytes(s,n+2);
280b1f1a DB	470	/* We previously read 11 bytes, so if j > 0, we must have
	471	* j == n+2 == s->packet_length. We have at least 11 valid
	472	* packet bytes. */
d02b48c6 RE	473	if (j <= 0) return(j);
d02b48c6 RE	474
cf82191d	475	ssl3_finish_mac(s, s->packet+2, s->packet_length-2);
e636e2ac MC	476
e636e2ac MC	477	/* CLIENT-HELLO */
cf82191d	478	if (s->msg_callback)
e636e2ac	479	s->msg_callback(0, SSL2_VERSION, 0, s->packet+2, s->packet_length-2, s, s->msg_callback_arg);
d02b48c6 RE	480
	481	p=s->packet;
	482	p+=5;
	483	n2s(p,csl);
	484	n2s(p,sil);
	485	n2s(p,cl);
	486	d=(unsigned char *)s->init_buf->data;
f1fd4544 BM	487	if ((csl+sil+cl+11) != s->packet_length) /* We can't have TLS extensions in SSL 2.0 format
	488	* Client Hello, can we? Error condition should be
	489	* '>' otherweise */
d02b48c6 RE	490	{
	491	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
	492	goto err;
	493	}
	494
9ba3ec91 BM	495	/* record header: msg_type ... */
9ba3ec91 BM	496	*(d++) = SSL3_MT_CLIENT_HELLO;
48948d53	497	/* ... and length (actual value will be written later) */
9ba3ec91 BM	498	d_len = d;
9ba3ec91 BM	499	d += 3;
48948d53 BM	500
48948d53 BM	501	/* client_version */
cb0369d8 BM	502	(d++) = SSL3_VERSION_MAJOR; / == v[0] */
cb0369d8 BM	503	*(d++) = v[1];
d02b48c6 RE	504
d02b48c6 RE	505	/* lets populate the random area */
657e60fa	506	/* get the challenge_length */
d02b48c6 RE	507	i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
	508	memset(d,0,SSL3_RANDOM_SIZE);
	509	memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
	510	d+=SSL3_RANDOM_SIZE;
	511
	512	/* no session-id reuse */
	513	*(d++)=0;
	514
	515	/* ciphers */
	516	j=0;
	517	dd=d;
	518	d+=2;
	519	for (i=0; i<csl; i+=3)
	520	{
	521	if (p[i] != 0) continue;
	522	*(d++)=p[i+1];
	523	*(d++)=p[i+2];
	524	j+=2;
	525	}
	526	s2n(j,dd);
	527
dfeab068	528	/* COMPRESSION */
d02b48c6 RE	529	*(d++)=1;
	530	*(d++)=0;
	531
f1fd4544	532	#if 0
ed3883d2	533	/* copy any remaining data with may be extensions */
f1fd4544 BM	534	p = p+csl+sil+cl;
	535	while (p < s->packet+s->packet_length)
	536	{
ed3883d2	537	(d++)=(p++);
f1fd4544 BM	538	}
f1fd4544 BM	539	#endif
ed3883d2	540
2fb3f002	541	i = (d-(unsigned char *)s->init_buf->data) - 4;
9ba3ec91	542	l2n3((long)i, d_len);
d02b48c6 RE	543
	544	/* get the data reused from the init_buf */
	545	s->s3->tmp.reuse_message=1;
	546	s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
	547	s->s3->tmp.message_size=i;
	548	}
	549
074309b7 BM	550	/* imaginary new state (for program structure): */
	551	/* s->state = SSL23_SR_CLNT_HELLO_C */
	552
d02b48c6 RE	553	if ((type == 2) \|\| (type == 3))
d02b48c6 RE	554	{
074309b7	555	/* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
392fa7a9 KR	556	const SSL_METHOD *new_method;
	557	new_method = ssl23_get_server_method(s->version);
	558	if (new_method == NULL)
62f45cc2 GT	559	{
	560	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	561	goto err;
	562	}
392fa7a9	563	s->method = new_method;
d02b48c6	564
58964a49	565	if (!ssl_init_wbio_buffer(s,1)) goto err;
d02b48c6 RE	566
	567	/* we are in this state */
	568	s->state=SSL3_ST_SR_CLNT_HELLO_A;
	569
	570	if (type == 3)
	571	{
	572	/* put the 'n' bytes we have read into the input buffer
	573	* for SSLv3 */
	574	s->rstate=SSL_ST_READ_HEADER;
	575	s->packet_length=n;
8671b898 BL	576	if (s->s3->rbuf.buf == NULL)
	577	if (!ssl3_setup_read_buffer(s))
	578	goto err;
	579
d02b48c6 RE	580	s->packet= &(s->s3->rbuf.buf[0]);
	581	memcpy(s->packet,buf,n);
	582	s->s3->rbuf.left=n;
	583	s->s3->rbuf.offset=0;
	584	}
	585	else
	586	{
	587	s->packet_length=0;
	588	s->s3->rbuf.left=0;
	589	s->s3->rbuf.offset=0;
	590	}
074309b7	591	#if 0 /* ssl3_get_client_hello does this */
413c4f45	592	s->client_version=(v[0]<<8)\|v[1];
074309b7	593	#endif
d02b48c6 RE	594	s->handshake_func=s->method->ssl_accept;
d02b48c6 RE	595	}
45f55f6a	596	else
d02b48c6 RE	597	{
	598	/* bad, very bad */
	599	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
	600	goto err;
	601	}
	602	s->init_num=0;
	603
26a3a48d	604	if (buf != buf_space) OPENSSL_free(buf);
d02b48c6 RE	605	return(SSL_accept(s));
d02b48c6 RE	606	err:
26a3a48d	607	if (buf != buf_space) OPENSSL_free(buf);
d02b48c6 RE	608	return(-1);
d02b48c6 RE	609	}