[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.]
 */

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

static SSL_METHOD *ssl23_get_server_method(int ver);
int ssl23_get_client_hello(SSL *s);
static SSL_METHOD *ssl23_get_server_method(int ver)
	{
	if (ver == SSL2_VERSION)
		return(SSLv2_server_method());
	if (ver == SSL3_VERSION)
		return(SSLv3_server_method());
	else if (ver == TLS1_VERSION)
		return(TLSv1_server_method());
	else
		return(NULL);
	}

SSL_METHOD *SSLv23_server_method(void)
	{
	static int init=1;
	static SSL_METHOD SSLv23_server_data;

	if (init)
		{
		memcpy((char *)&SSLv23_server_data,
			(char *)sslv23_base_method(),sizeof(SSL_METHOD));
		SSLv23_server_data.ssl_accept=ssl23_accept;
		SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
		init=0;
		}
	return(&SSLv23_server_data);
	}

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

	RAND_seed(&Time,sizeof(Time));
	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;
	
	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
	s->in_handshake++;

	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))
					{
					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:
	if (cb != NULL)
		cb(s,SSL_CB_ACCEPT_EXIT,ret);
	s->in_handshake--;
	return(ret);
	}


int ssl23_get_client_hello(SSL *s)
	{
	char buf_space[8];
	char *buf= &(buf_space[0]);
	unsigned char *p,*d,*dd;
	unsigned int i;
	unsigned int csl,sil,cl;
	int n=0,j,tls1=0;
	int type=0,use_sslv2_strong=0;
	int v[2];

	/* read the initial header */
	v[0]=v[1]=0;
	if (s->state ==	SSL23_ST_SR_CLNT_HELLO_A)
		{
		if (!ssl3_setup_buffers(s)) goto err;

		n=ssl23_read_bytes(s,7);
		if (n != 7) 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 */
				if (!(s->options & SSL_OP_NO_SSLv2))
					type=1;
				}
			else if (p[3] == SSL3_VERSION_MAJOR)
				{
				v[0]=p[3]; v[1]=p[4];
				/* SSLv3/TLSv1 */
				if (p[4] >= TLS1_VERSION_MINOR)
					{
					if (!(s->options & SSL_OP_NO_TLSv1))
						{
						tls1=1;
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					else if (!(s->options & SSL_OP_NO_SSLv3))
						{
						s->state=SSL23_ST_SR_CLNT_HELLO_B;
						}
					else if (!(s->options & SSL_OP_NO_SSLv2))
						{
						type=1;
						}
					}
				else if (!(s->options & SSL_OP_NO_SSLv3))
					s->state=SSL23_ST_SR_CLNT_HELLO_B;
				else if (!(s->options & SSL_OP_NO_SSLv2))
					type=1;

				if (s->options & SSL_OP_NON_EXPORT_FIRST)
					{
					STACK_OF(SSL_CIPHER) *sk;
					SSL_CIPHER *c;
					int ne2,ne3;

					j=((p[0]&0x7f)<<8)|p[1];
					if (j > (1024*4))
						{
						SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
						goto err;
						}

					n=ssl23_read_bytes(s,j+2);
					if (n <= 0) return(n);
					p=s->packet;

					if ((buf=Malloc(n)) == NULL)
						{
						SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
						goto err;
						}
					memcpy(buf,p,n);

					p+=5;
					n2s(p,csl);
					p+=4;

					sk=ssl_bytes_to_cipher_list(
						s,p,csl,NULL);
					if (sk != NULL)
						{
						ne2=ne3=0;
						for (j=0; j<sk_SSL_CIPHER_num(sk); j++)
							{
							c=sk_SSL_CIPHER_value(sk,j);
							if (!SSL_C_IS_EXPORT(c))
								{
								if ((c->id>>24L) == 2L)
									ne2=1;
								else
									ne3=1;
								}
							}
						if (ne2 && !ne3)
							{
							type=1;
							use_sslv2_strong=1;
							goto next_bit;
							}
						}
					}
				}
			}
		else if ((p[0] == SSL3_RT_HANDSHAKE) &&
			 (p[1] == SSL3_VERSION_MAJOR) &&
			 (p[5] == SSL3_MT_CLIENT_HELLO))
			{
			v[0]=p[1]; v[1]=p[2];
			/* true SSLv3 or tls1 */
			if (p[2] >= TLS1_VERSION_MINOR)
				{
				if (!(s->options & SSL_OP_NO_TLSv1))
					{
					type=3;
					tls1=1;
					}
				else if (!(s->options & SSL_OP_NO_SSLv3))
					type=3;
				}
			else if (!(s->options & SSL_OP_NO_SSLv3))
				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;
			}
		}

next_bit:
	if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
		{
		/* we have a SSLv3/TLSv1 in a SSLv2 header */
		type=2;
		p=s->packet;
		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;
			}

		j=ssl23_read_bytes(s,n+2);
		if (j <= 0) return(j);

		ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);

		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)
			{
			SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
			goto err;
			}

		*(d++)=SSL3_VERSION_MAJOR;
		if (tls1)
			*(d++)=TLS1_VERSION_MINOR;
		else
			*(d++)=SSL3_VERSION_MINOR;

		/* lets populate the random area */
		/* get the chalenge_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;
		
		i=(d-(unsigned char *)s->init_buf->data);

		/* 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;
		}

	if (type == 1)
		{
		/* we are talking sslv2 */
		/* we need to clean up the SSLv3/TLSv1 setup and put in the
		 * sslv2 stuff. */

		if (s->s2 == NULL)
			{
			if (!ssl2_new(s))
				goto err;
			}
		else
			ssl2_clear(s);

		if (s->s3 != NULL) ssl3_free(s);

		if (!BUF_MEM_grow(s->init_buf,
			SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
			{
			goto err;
			}

		s->state=SSL2_ST_GET_CLIENT_HELLO_A;
		if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) ||
			use_sslv2_strong)
			s->s2->ssl2_rollback=0;
		else
			s->s2->ssl2_rollback=1;

		/* setup the 5 bytes we have read so we get them from
		 * the sslv2 buffer */
		s->rstate=SSL_ST_READ_HEADER;
		s->packet_length=n;
		s->packet= &(s->s2->rbuf[0]);
		memcpy(s->packet,buf,n);
		s->s2->rbuf_left=n;
		s->s2->rbuf_offs=0;

		s->method=SSLv2_server_method();
		s->handshake_func=s->method->ssl_accept;
		}

	if ((type == 2) || (type == 3))
		{
		/* we have SSLv3/TLSv1 */

		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;
			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 (tls1)
			{
			s->version=TLS1_VERSION;
			s->method=TLSv1_server_method();
			}
		else
			{
			s->version=SSL3_VERSION;
			s->method=SSLv3_server_method();
			}
		s->client_version=(v[0]<<8)|v[1];
		s->handshake_func=s->method->ssl_accept;
		}
	
	if ((type < 1) || (type > 3))
		{
		/* bad, very bad */
		SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
		goto err;
		}
	s->init_num=0;

	if (buf != buf_space) Free(buf);
	s->first_packet=1;
	return(SSL_accept(s));
err:
	if (buf != buf_space) 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	*/
	58
	59	#include <stdio.h>
ec577822 BM	60	#include <openssl/buffer.h>
	61	#include <openssl/rand.h>
	62	#include <openssl/objects.h>
	63	#include <openssl/evp.h>
d02b48c6 RE	64	#include "ssl_locl.h"
d02b48c6 RE	65
9b3086fe	66	static SSL_METHOD *ssl23_get_server_method(int ver);
d02b48c6	67	int ssl23_get_client_hello(SSL *s);
6b691a5c	68	static SSL_METHOD *ssl23_get_server_method(int ver)
d02b48c6	69	{
58964a49	70	if (ver == SSL2_VERSION)
d02b48c6	71	return(SSLv2_server_method());
79df9d62	72	if (ver == SSL3_VERSION)
d02b48c6	73	return(SSLv3_server_method());
58964a49 RE	74	else if (ver == TLS1_VERSION)
58964a49 RE	75	return(TLSv1_server_method());
d02b48c6 RE	76	else
	77	return(NULL);
	78	}
	79
6b691a5c	80	SSL_METHOD *SSLv23_server_method(void)
d02b48c6 RE	81	{
	82	static int init=1;
	83	static SSL_METHOD SSLv23_server_data;
	84
	85	if (init)
	86	{
d02b48c6 RE	87	memcpy((char *)&SSLv23_server_data,
	88	(char *)sslv23_base_method(),sizeof(SSL_METHOD));
	89	SSLv23_server_data.ssl_accept=ssl23_accept;
	90	SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
5cc146f3	91	init=0;
d02b48c6 RE	92	}
	93	return(&SSLv23_server_data);
	94	}
	95
6b691a5c	96	int ssl23_accept(SSL *s)
d02b48c6 RE	97	{
	98	BUF_MEM *buf;
	99	unsigned long Time=time(NULL);
	100	void (*cb)()=NULL;
	101	int ret= -1;
	102	int new_state,state;
	103
bf5dcd13	104	RAND_seed(&Time,sizeof(Time));
d02b48c6	105	ERR_clear_error();
58964a49	106	clear_sys_error();
d02b48c6 RE	107
	108	if (s->info_callback != NULL)
	109	cb=s->info_callback;
	110	else if (s->ctx->info_callback != NULL)
	111	cb=s->ctx->info_callback;
	112
	113	if (!SSL_in_init(s) \|\| SSL_in_before(s)) SSL_clear(s);
	114	s->in_handshake++;
	115
	116	for (;;)
	117	{
	118	state=s->state;
	119
	120	switch(s->state)
	121	{
	122	case SSL_ST_BEFORE:
	123	case SSL_ST_ACCEPT:
	124	case SSL_ST_BEFORE\|SSL_ST_ACCEPT:
	125	case SSL_ST_OK\|SSL_ST_ACCEPT:
	126
413c4f45	127	s->server=1;
d02b48c6 RE	128	if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
d02b48c6 RE	129
58964a49	130	/* s->version=SSL3_VERSION; */
d02b48c6 RE	131	s->type=SSL_ST_ACCEPT;
	132
	133	if (s->init_buf == NULL)
	134	{
	135	if ((buf=BUF_MEM_new()) == NULL)
	136	{
	137	ret= -1;
	138	goto end;
	139	}
	140	if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
	141	{
	142	ret= -1;
	143	goto end;
	144	}
	145	s->init_buf=buf;
	146	}
	147
	148	ssl3_init_finished_mac(s);
	149
	150	s->state=SSL23_ST_SR_CLNT_HELLO_A;
413c4f45	151	s->ctx->stats.sess_accept++;
d02b48c6 RE	152	s->init_num=0;
	153	break;
	154
	155	case SSL23_ST_SR_CLNT_HELLO_A:
	156	case SSL23_ST_SR_CLNT_HELLO_B:
	157
	158	s->shutdown=0;
	159	ret=ssl23_get_client_hello(s);
	160	if (ret >= 0) cb=NULL;
	161	goto end;
dfeab068	162	/* break; */
d02b48c6 RE	163
	164	default:
	165	SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
	166	ret= -1;
	167	goto end;
	168	/* break; */
	169	}
	170
	171	if ((cb != NULL) && (s->state != state))
	172	{
	173	new_state=s->state;
	174	s->state=state;
	175	cb(s,SSL_CB_ACCEPT_LOOP,1);
	176	s->state=new_state;
	177	}
	178	}
	179	end:
	180	if (cb != NULL)
	181	cb(s,SSL_CB_ACCEPT_EXIT,ret);
	182	s->in_handshake--;
	183	return(ret);
	184	}
	185
	186
6b691a5c	187	int ssl23_get_client_hello(SSL *s)
d02b48c6 RE	188	{
	189	char buf_space[8];
	190	char *buf= &(buf_space[0]);
	191	unsigned char p,d,*dd;
	192	unsigned int i;
	193	unsigned int csl,sil,cl;
58964a49	194	int n=0,j,tls1=0;
d02b48c6	195	int type=0,use_sslv2_strong=0;
413c4f45	196	int v[2];
d02b48c6 RE	197
d02b48c6 RE	198	/* read the initial header */
413c4f45	199	v[0]=v[1]=0;
d02b48c6 RE	200	if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
	201	{
	202	if (!ssl3_setup_buffers(s)) goto err;
	203
	204	n=ssl23_read_bytes(s,7);
adbfb083	205	if (n != 7) return(n); /* n == -1 \|\| n == 0 */
d02b48c6 RE	206
	207	p=s->packet;
	208
	209	memcpy(buf,p,n);
	210
	211	if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
	212	{
	213	/* SSLv2 header */
	214	if ((p[3] == 0x00) && (p[4] == 0x02))
	215	{
413c4f45	216	v[0]=p[3]; v[1]=p[4];
d02b48c6	217	/* SSLv2 */
58964a49 RE	218	if (!(s->options & SSL_OP_NO_SSLv2))
58964a49 RE	219	type=1;
d02b48c6 RE	220	}
	221	else if (p[3] == SSL3_VERSION_MAJOR)
	222	{
413c4f45	223	v[0]=p[3]; v[1]=p[4];
58964a49 RE	224	/* SSLv3/TLSv1 */
	225	if (p[4] >= TLS1_VERSION_MINOR)
	226	{
	227	if (!(s->options & SSL_OP_NO_TLSv1))
	228	{
	229	tls1=1;
	230	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	231	}
	232	else if (!(s->options & SSL_OP_NO_SSLv3))
	233	{
	234	s->state=SSL23_ST_SR_CLNT_HELLO_B;
	235	}
dfeab068 RE	236	else if (!(s->options & SSL_OP_NO_SSLv2))
	237	{
	238	type=1;
	239	}
58964a49 RE	240	}
	241	else if (!(s->options & SSL_OP_NO_SSLv3))
	242	s->state=SSL23_ST_SR_CLNT_HELLO_B;
dfeab068 RE	243	else if (!(s->options & SSL_OP_NO_SSLv2))
dfeab068 RE	244	type=1;
58964a49 RE	245
58964a49 RE	246	if (s->options & SSL_OP_NON_EXPORT_FIRST)
d02b48c6	247	{
f73e07cf	248	STACK_OF(SSL_CIPHER) *sk;
d02b48c6 RE	249	SSL_CIPHER *c;
	250	int ne2,ne3;
	251
	252	j=((p[0]&0x7f)<<8)\|p[1];
	253	if (j > (1024*4))
	254	{
	255	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
	256	goto err;
	257	}
	258
	259	n=ssl23_read_bytes(s,j+2);
	260	if (n <= 0) return(n);
	261	p=s->packet;
	262
	263	if ((buf=Malloc(n)) == NULL)
	264	{
	265	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
	266	goto err;
	267	}
	268	memcpy(buf,p,n);
	269
	270	p+=5;
	271	n2s(p,csl);
	272	p+=4;
	273
	274	sk=ssl_bytes_to_cipher_list(
	275	s,p,csl,NULL);
	276	if (sk != NULL)
	277	{
	278	ne2=ne3=0;
f73e07cf	279	for (j=0; j<sk_SSL_CIPHER_num(sk); j++)
d02b48c6	280	{
f73e07cf	281	c=sk_SSL_CIPHER_value(sk,j);
06ab81f9	282	if (!SSL_C_IS_EXPORT(c))
d02b48c6 RE	283	{
	284	if ((c->id>>24L) == 2L)
	285	ne2=1;
	286	else
	287	ne3=1;
	288	}
	289	}
	290	if (ne2 && !ne3)
	291	{
	292	type=1;
	293	use_sslv2_strong=1;
	294	goto next_bit;
	295	}
	296	}
	297	}
d02b48c6 RE	298	}
	299	}
	300	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
	301	(p[1] == SSL3_VERSION_MAJOR) &&
	302	(p[5] == SSL3_MT_CLIENT_HELLO))
	303	{
413c4f45	304	v[0]=p[1]; v[1]=p[2];
58964a49 RE	305	/* true SSLv3 or tls1 */
	306	if (p[2] >= TLS1_VERSION_MINOR)
	307	{
	308	if (!(s->options & SSL_OP_NO_TLSv1))
	309	{
	310	type=3;
	311	tls1=1;
	312	}
	313	else if (!(s->options & SSL_OP_NO_SSLv3))
	314	type=3;
	315	}
	316	else if (!(s->options & SSL_OP_NO_SSLv3))
	317	type=3;
d02b48c6	318	}
dfeab068 RE	319	else if ((strncmp("GET ", (char *)p,4) == 0) \|\|
	320	(strncmp("POST ",(char *)p,5) == 0) \|\|
	321	(strncmp("HEAD ",(char *)p,5) == 0) \|\|
	322	(strncmp("PUT ", (char *)p,4) == 0))
d02b48c6	323	{
58964a49	324	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
d02b48c6 RE	325	goto err;
d02b48c6 RE	326	}
dfeab068	327	else if (strncmp("CONNECT",(char *)p,7) == 0)
d02b48c6	328	{
58964a49	329	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
d02b48c6 RE	330	goto err;
	331	}
	332	}
	333
	334	next_bit:
	335	if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
	336	{
58964a49	337	/* we have a SSLv3/TLSv1 in a SSLv2 header */
d02b48c6 RE	338	type=2;
	339	p=s->packet;
	340	n=((p[0]&0x7f)<<8)\|p[1];
	341	if (n > (1024*4))
	342	{
	343	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
	344	goto err;
	345	}
	346
	347	j=ssl23_read_bytes(s,n+2);
	348	if (j <= 0) return(j);
	349
	350	ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
	351
	352	p=s->packet;
	353	p+=5;
	354	n2s(p,csl);
	355	n2s(p,sil);
	356	n2s(p,cl);
	357	d=(unsigned char *)s->init_buf->data;
	358	if ((csl+sil+cl+11) != s->packet_length)
	359	{
	360	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
	361	goto err;
	362	}
	363
	364	*(d++)=SSL3_VERSION_MAJOR;
58964a49 RE	365	if (tls1)
	366	*(d++)=TLS1_VERSION_MINOR;
	367	else
	368	*(d++)=SSL3_VERSION_MINOR;
d02b48c6 RE	369
	370	/* lets populate the random area */
	371	/* get the chalenge_length */
	372	i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
	373	memset(d,0,SSL3_RANDOM_SIZE);
	374	memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
	375	d+=SSL3_RANDOM_SIZE;
	376
	377	/* no session-id reuse */
	378	*(d++)=0;
	379
	380	/* ciphers */
	381	j=0;
	382	dd=d;
	383	d+=2;
	384	for (i=0; i<csl; i+=3)
	385	{
	386	if (p[i] != 0) continue;
	387	*(d++)=p[i+1];
	388	*(d++)=p[i+2];
	389	j+=2;
	390	}
	391	s2n(j,dd);
	392
dfeab068	393	/* COMPRESSION */
d02b48c6 RE	394	*(d++)=1;
	395	*(d++)=0;
	396
	397	i=(d-(unsigned char *)s->init_buf->data);
	398
	399	/* get the data reused from the init_buf */
	400	s->s3->tmp.reuse_message=1;
	401	s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
	402	s->s3->tmp.message_size=i;
	403	}
	404
	405	if (type == 1)
	406	{
	407	/* we are talking sslv2 */
58964a49	408	/* we need to clean up the SSLv3/TLSv1 setup and put in the
d02b48c6 RE	409	* sslv2 stuff. */
	410
	411	if (s->s2 == NULL)
	412	{
	413	if (!ssl2_new(s))
	414	goto err;
	415	}
	416	else
	417	ssl2_clear(s);
	418
	419	if (s->s3 != NULL) ssl3_free(s);
	420
	421	if (!BUF_MEM_grow(s->init_buf,
	422	SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
	423	{
	424	goto err;
	425	}
	426
	427	s->state=SSL2_ST_GET_CLIENT_HELLO_A;
58964a49	428	if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) \|\|
d02b48c6 RE	429	use_sslv2_strong)
	430	s->s2->ssl2_rollback=0;
	431	else
	432	s->s2->ssl2_rollback=1;
	433
	434	/* setup the 5 bytes we have read so we get them from
	435	* the sslv2 buffer */
	436	s->rstate=SSL_ST_READ_HEADER;
	437	s->packet_length=n;
	438	s->packet= &(s->s2->rbuf[0]);
	439	memcpy(s->packet,buf,n);
	440	s->s2->rbuf_left=n;
	441	s->s2->rbuf_offs=0;
	442
	443	s->method=SSLv2_server_method();
	444	s->handshake_func=s->method->ssl_accept;
	445	}
	446
	447	if ((type == 2) \|\| (type == 3))
	448	{
58964a49	449	/* we have SSLv3/TLSv1 */
d02b48c6	450
58964a49	451	if (!ssl_init_wbio_buffer(s,1)) goto err;
d02b48c6 RE	452
	453	/* we are in this state */
	454	s->state=SSL3_ST_SR_CLNT_HELLO_A;
	455
	456	if (type == 3)
	457	{
	458	/* put the 'n' bytes we have read into the input buffer
	459	* for SSLv3 */
	460	s->rstate=SSL_ST_READ_HEADER;
	461	s->packet_length=n;
	462	s->packet= &(s->s3->rbuf.buf[0]);
	463	memcpy(s->packet,buf,n);
	464	s->s3->rbuf.left=n;
	465	s->s3->rbuf.offset=0;
	466	}
	467	else
	468	{
	469	s->packet_length=0;
	470	s->s3->rbuf.left=0;
	471	s->s3->rbuf.offset=0;
	472	}
	473
58964a49 RE	474	if (tls1)
	475	{
	476	s->version=TLS1_VERSION;
	477	s->method=TLSv1_server_method();
	478	}
	479	else
	480	{
	481	s->version=SSL3_VERSION;
	482	s->method=SSLv3_server_method();
	483	}
413c4f45	484	s->client_version=(v[0]<<8)\|v[1];
d02b48c6 RE	485	s->handshake_func=s->method->ssl_accept;
	486	}
	487
	488	if ((type < 1) \|\| (type > 3))
	489	{
	490	/* bad, very bad */
	491	SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
	492	goto err;
	493	}
	494	s->init_num=0;
	495
	496	if (buf != buf_space) Free(buf);
	497	s->first_packet=1;
	498	return(SSL_accept(s));
	499	err:
	500	if (buf != buf_space) Free(buf);
	501	return(-1);
	502	}
	503