[thirdparty/openssl.git] / ssl / s23_clnt.c

/* ssl/s23_clnt.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 "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>

static SSL_METHOD *ssl23_get_client_method(int ver);
static int ssl23_client_hello(SSL *s);
static int ssl23_get_server_hello(SSL *s);
static SSL_METHOD *ssl23_get_client_method(int ver)
	{
#ifndef OPENSSL_NO_SSL2
	if (ver == SSL2_VERSION)
		return(SSLv2_client_method());
#endif
	if (ver == SSL3_VERSION)
		return(SSLv3_client_method());
	else if (ver == TLS1_VERSION)
		return(TLSv1_client_method());
	else
		return(NULL);
	}

SSL_METHOD *SSLv23_client_method(void)
	{
	static int init=1;
	static SSL_METHOD SSLv23_client_data;

	if (init)
		{
		CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);

		if (init)
			{
			memcpy((char *)&SSLv23_client_data,
				(char *)sslv23_base_method(),sizeof(SSL_METHOD));
			SSLv23_client_data.ssl_connect=ssl23_connect;
			SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
			init=0;
			}

		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
		}
	return(&SSLv23_client_data);
	}

int ssl23_connect(SSL *s)
	{
	BUF_MEM *buf;
	unsigned long Time=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_CONNECT:
		case SSL_ST_BEFORE|SSL_ST_CONNECT:
		case SSL_ST_OK|SSL_ST_CONNECT:

			if (s->session != NULL)
				{
				SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
				ret= -1;
				goto end;
				}
			s->server=0;
			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

			/* s->version=TLS1_VERSION; */
			s->type=SSL_ST_CONNECT;

			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;
				}

			if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }

			ssl3_init_finished_mac(s);

			s->state=SSL23_ST_CW_CLNT_HELLO_A;
			s->ctx->stats.sess_connect++;
			s->init_num=0;
			break;

		case SSL23_ST_CW_CLNT_HELLO_A:
		case SSL23_ST_CW_CLNT_HELLO_B:

			s->shutdown=0;
			ret=ssl23_client_hello(s);
			if (ret <= 0) goto end;
			s->state=SSL23_ST_CR_SRVR_HELLO_A;
			s->init_num=0;

			break;

		case SSL23_ST_CR_SRVR_HELLO_A:
		case SSL23_ST_CR_SRVR_HELLO_B:
			ret=ssl23_get_server_hello(s);
			if (ret >= 0) cb=NULL;
			goto end;
			/* break; */

		default:
			SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
			ret= -1;
			goto end;
			/* break; */
			}

		if (s->debug) { (void)BIO_flush(s->wbio); }

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


static int ssl23_client_hello(SSL *s)
	{
	unsigned char *buf;
	unsigned char *p,*d;
	int i,ch_len;
	int ret;

	buf=(unsigned char *)s->init_buf->data;
	if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
		{
#if 0
		/* don't reuse session-id's */
		if (!ssl_get_new_session(s,0))
			{
			return(-1);
			}
#endif

		p=s->s3->client_random;
		RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE);

		/* Do the message type and length last */
		d= &(buf[2]);
		p=d+9;

		*(d++)=SSL2_MT_CLIENT_HELLO;
		if (!(s->options & SSL_OP_NO_TLSv1))
			{
			*(d++)=TLS1_VERSION_MAJOR;
			*(d++)=TLS1_VERSION_MINOR;
			s->client_version=TLS1_VERSION;
			}
		else if (!(s->options & SSL_OP_NO_SSLv3))
			{
			*(d++)=SSL3_VERSION_MAJOR;
			*(d++)=SSL3_VERSION_MINOR;
			s->client_version=SSL3_VERSION;
			}
		else if (!(s->options & SSL_OP_NO_SSLv2))
			{
			*(d++)=SSL2_VERSION_MAJOR;
			*(d++)=SSL2_VERSION_MINOR;
			s->client_version=SSL2_VERSION;
			}
		else
			{
			SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
			return(-1);
			}

		/* Ciphers supported */
		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
		if (i == 0)
			{
			/* no ciphers */
			SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
			return(-1);
			}
		s2n(i,d);
		p+=i;

		/* put in the session-id, zero since there is no
		 * reuse. */
#if 0
		s->session->session_id_length=0;
#endif
		s2n(0,d);

		if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
			ch_len=SSL2_CHALLENGE_LENGTH;
		else
			ch_len=SSL2_MAX_CHALLENGE_LENGTH;

		/* write out sslv2 challenge */
		if (SSL3_RANDOM_SIZE < ch_len)
			i=SSL3_RANDOM_SIZE;
		else
			i=ch_len;
		s2n(i,d);
		memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
		RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
		memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
		p+=i;

		i= p- &(buf[2]);
		buf[0]=((i>>8)&0xff)|0x80;
		buf[1]=(i&0xff);

		s->state=SSL23_ST_CW_CLNT_HELLO_B;
		/* number of bytes to write */
		s->init_num=i+2;
		s->init_off=0;

		ssl3_finish_mac(s,&(buf[2]),i);
		}

	/* SSL3_ST_CW_CLNT_HELLO_B */
	ret = ssl23_write_bytes(s);
	if (ret >= 2)
		if (s->msg_callback)
			s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
	return ret;
	}

static int ssl23_get_server_hello(SSL *s)
	{
	char buf[8];
	unsigned char *p;
	int i;
	int n;

	n=ssl23_read_bytes(s,7);

	if (n != 7) return(n);
	p=s->packet;

	memcpy(buf,p,n);

	if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
		(p[5] == 0x00) && (p[6] == 0x02))
		{
#ifdef OPENSSL_NO_SSL2
		SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
		goto err;
#else
		/* we are talking sslv2 */
		/* we need to clean up the SSLv3 setup and put in the
		 * sslv2 stuff. */
		int ch_len;

		if (s->options & SSL_OP_NO_SSLv2)
			{
			SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
			goto err;
			}
		if (s->s2 == NULL)
			{
			if (!ssl2_new(s))
				goto err;
			}
		else
			ssl2_clear(s);

		if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
			ch_len=SSL2_CHALLENGE_LENGTH;
		else
			ch_len=SSL2_MAX_CHALLENGE_LENGTH;

		/* write out sslv2 challenge */
		i=(SSL3_RANDOM_SIZE < ch_len)
			?SSL3_RANDOM_SIZE:ch_len;
		s->s2->challenge_length=i;
		memcpy(s->s2->challenge,
			&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);

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

		if (!BUF_MEM_grow_clean(s->init_buf,
			SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
			{
			SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
			goto err;
			}

		s->state=SSL2_ST_GET_SERVER_HELLO_A;
		if (!(s->client_version == SSL2_VERSION))
			/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
			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;

		/* we have already written one */
		s->s2->write_sequence=1;

		s->method=SSLv2_client_method();
		s->handshake_func=s->method->ssl_connect;
#endif
		}
	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
		 (p[1] == SSL3_VERSION_MAJOR) &&
		 ((p[2] == SSL3_VERSION_MINOR) ||
		  (p[2] == TLS1_VERSION_MINOR)) &&
		 (p[5] == SSL3_MT_SERVER_HELLO))
		{
		/* we have sslv3 or tls1 */

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

		/* we are in this state */
		s->state=SSL3_ST_CR_SRVR_HELLO_A;

		/* put the 5 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;

		if ((p[2] == SSL3_VERSION_MINOR) &&
			!(s->options & SSL_OP_NO_SSLv3))
			{
			s->version=SSL3_VERSION;
			s->method=SSLv3_client_method();
			}
		else if ((p[2] == TLS1_VERSION_MINOR) &&
			!(s->options & SSL_OP_NO_TLSv1))
			{
			s->version=TLS1_VERSION;
			s->method=TLSv1_client_method();
			}
		else
			{
			SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
			goto err;
			}
			
		s->handshake_func=s->method->ssl_connect;
		}
	else if ((p[0] == SSL3_RT_ALERT) &&
		 (p[1] == SSL3_VERSION_MAJOR) &&
		 ((p[2] == SSL3_VERSION_MINOR) ||
		  (p[2] == TLS1_VERSION_MINOR)) &&
		 (p[3] == 0) &&
		 (p[4] == 2))
		{
		void (*cb)(const SSL *ssl,int type,int val)=NULL;
		int j;

		/* An alert */
		if (s->info_callback != NULL)
			cb=s->info_callback;
		else if (s->ctx->info_callback != NULL)
			cb=s->ctx->info_callback;
 
		i=p[5];
		if (cb != NULL)
			{
			j=(i<<8)|p[6];
			cb(s,SSL_CB_READ_ALERT,j);
			}

		s->rwstate=SSL_NOTHING;
		SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
		goto err;
		}
	else
		{
		SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
		goto err;
		}
	s->init_num=0;

	/* Since, if we are sending a ssl23 client hello, we are not
	 * reusing a session-id */
	if (!ssl_get_new_session(s,0))
		goto err;

	s->first_packet=1;
	return(SSL_connect(s));
err:
	return(-1);
	}
Commit	Line	Data
d02b48c6	1	/* ssl/s23_clnt.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>
7b63c0fa	60	#include "ssl_locl.h"
ec577822 BM	61	#include <openssl/buffer.h>
	62	#include <openssl/rand.h>
	63	#include <openssl/objects.h>
	64	#include <openssl/evp.h>
d02b48c6	65
9b3086fe	66	static SSL_METHOD *ssl23_get_client_method(int ver);
d02b48c6 RE	67	static int ssl23_client_hello(SSL *s);
d02b48c6 RE	68	static int ssl23_get_server_hello(SSL *s);
6b691a5c	69	static SSL_METHOD *ssl23_get_client_method(int ver)
d02b48c6	70	{
bc36ee62	71	#ifndef OPENSSL_NO_SSL2
58964a49	72	if (ver == SSL2_VERSION)
d02b48c6	73	return(SSLv2_client_method());
aa82db4f	74	#endif
79df9d62	75	if (ver == SSL3_VERSION)
d02b48c6	76	return(SSLv3_client_method());
58964a49 RE	77	else if (ver == TLS1_VERSION)
58964a49 RE	78	return(TLSv1_client_method());
d02b48c6 RE	79	else
	80	return(NULL);
	81	}
	82
6b691a5c	83	SSL_METHOD *SSLv23_client_method(void)
d02b48c6 RE	84	{
	85	static int init=1;
	86	static SSL_METHOD SSLv23_client_data;
	87
	88	if (init)
	89	{
e78f1378 BM	90	CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
e78f1378 BM	91
b8565a9a BM	92	if (init)
	93	{
	94	memcpy((char *)&SSLv23_client_data,
	95	(char *)sslv23_base_method(),sizeof(SSL_METHOD));
	96	SSLv23_client_data.ssl_connect=ssl23_connect;
	97	SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
	98	init=0;
	99	}
e78f1378 BM	100
e78f1378 BM	101	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
d02b48c6 RE	102	}
	103	return(&SSLv23_client_data);
	104	}
	105
6b691a5c	106	int ssl23_connect(SSL *s)
d02b48c6 RE	107	{
	108	BUF_MEM *buf;
	109	unsigned long Time=time(NULL);
45d87a1f	110	void (cb)(const SSL ssl,int type,int val)=NULL;
d02b48c6 RE	111	int ret= -1;
	112	int new_state,state;
	113
eb952088	114	RAND_add(&Time,sizeof(Time),0);
d02b48c6	115	ERR_clear_error();
58964a49	116	clear_sys_error();
d02b48c6 RE	117
	118	if (s->info_callback != NULL)
	119	cb=s->info_callback;
	120	else if (s->ctx->info_callback != NULL)
	121	cb=s->ctx->info_callback;
	122
d02b48c6	123	s->in_handshake++;
979689aa	124	if (!SSL_in_init(s) \|\| SSL_in_before(s)) SSL_clear(s);
d02b48c6 RE	125
	126	for (;;)
	127	{
	128	state=s->state;
	129
	130	switch(s->state)
	131	{
	132	case SSL_ST_BEFORE:
	133	case SSL_ST_CONNECT:
	134	case SSL_ST_BEFORE\|SSL_ST_CONNECT:
	135	case SSL_ST_OK\|SSL_ST_CONNECT:
	136
413c4f45 MC	137	if (s->session != NULL)
	138	{
	139	SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
	140	ret= -1;
	141	goto end;
	142	}
	143	s->server=0;
d02b48c6 RE	144	if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
d02b48c6 RE	145
58964a49	146	/* s->version=TLS1_VERSION; */
d02b48c6 RE	147	s->type=SSL_ST_CONNECT;
	148
	149	if (s->init_buf == NULL)
	150	{
	151	if ((buf=BUF_MEM_new()) == NULL)
	152	{
	153	ret= -1;
	154	goto end;
	155	}
	156	if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
	157	{
	158	ret= -1;
	159	goto end;
	160	}
	161	s->init_buf=buf;
	162	}
	163
	164	if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
	165
	166	ssl3_init_finished_mac(s);
	167
	168	s->state=SSL23_ST_CW_CLNT_HELLO_A;
413c4f45	169	s->ctx->stats.sess_connect++;
d02b48c6 RE	170	s->init_num=0;
	171	break;
	172
	173	case SSL23_ST_CW_CLNT_HELLO_A:
	174	case SSL23_ST_CW_CLNT_HELLO_B:
	175
	176	s->shutdown=0;
	177	ret=ssl23_client_hello(s);
	178	if (ret <= 0) goto end;
	179	s->state=SSL23_ST_CR_SRVR_HELLO_A;
	180	s->init_num=0;
	181
	182	break;
	183
	184	case SSL23_ST_CR_SRVR_HELLO_A:
	185	case SSL23_ST_CR_SRVR_HELLO_B:
	186	ret=ssl23_get_server_hello(s);
	187	if (ret >= 0) cb=NULL;
	188	goto end;
dfeab068	189	/* break; */
d02b48c6 RE	190
	191	default:
	192	SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
	193	ret= -1;
	194	goto end;
	195	/* break; */
	196	}
	197
d58d092b	198	if (s->debug) { (void)BIO_flush(s->wbio); }
d02b48c6 RE	199
	200	if ((cb != NULL) && (s->state != state))
	201	{
	202	new_state=s->state;
	203	s->state=state;
	204	cb(s,SSL_CB_CONNECT_LOOP,1);
	205	s->state=new_state;
	206	}
	207	}
	208	end:
	209	s->in_handshake--;
	210	if (cb != NULL)
	211	cb(s,SSL_CB_CONNECT_EXIT,ret);
	212	return(ret);
	213	}
	214
	215
6b691a5c	216	static int ssl23_client_hello(SSL *s)
d02b48c6 RE	217	{
	218	unsigned char *buf;
	219	unsigned char p,d;
	220	int i,ch_len;
cf82191d	221	int ret;
d02b48c6 RE	222
	223	buf=(unsigned char *)s->init_buf->data;
	224	if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
	225	{
	226	#if 0
	227	/* don't reuse session-id's */
	228	if (!ssl_get_new_session(s,0))
	229	{
	230	return(-1);
	231	}
	232	#endif
	233
	234	p=s->s3->client_random;
e7f97e2d	235	RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE);
d02b48c6 RE	236
	237	/* Do the message type and length last */
	238	d= &(buf[2]);
	239	p=d+9;
	240
	241	*(d++)=SSL2_MT_CLIENT_HELLO;
58964a49 RE	242	if (!(s->options & SSL_OP_NO_TLSv1))
	243	{
	244	*(d++)=TLS1_VERSION_MAJOR;
	245	*(d++)=TLS1_VERSION_MINOR;
413c4f45	246	s->client_version=TLS1_VERSION;
58964a49 RE	247	}
	248	else if (!(s->options & SSL_OP_NO_SSLv3))
	249	{
	250	*(d++)=SSL3_VERSION_MAJOR;
	251	*(d++)=SSL3_VERSION_MINOR;
413c4f45	252	s->client_version=SSL3_VERSION;
58964a49 RE	253	}
	254	else if (!(s->options & SSL_OP_NO_SSLv2))
	255	{
	256	*(d++)=SSL2_VERSION_MAJOR;
	257	*(d++)=SSL2_VERSION_MINOR;
413c4f45	258	s->client_version=SSL2_VERSION;
58964a49 RE	259	}
	260	else
	261	{
	262	SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
	263	return(-1);
	264	}
d02b48c6 RE	265
	266	/* Ciphers supported */
	267	i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
	268	if (i == 0)
	269	{
	270	/* no ciphers */
	271	SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
	272	return(-1);
	273	}
	274	s2n(i,d);
	275	p+=i;
	276
	277	/* put in the session-id, zero since there is no
	278	* reuse. */
	279	#if 0
	280	s->session->session_id_length=0;
	281	#endif
	282	s2n(0,d);
	283
58964a49	284	if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
d02b48c6 RE	285	ch_len=SSL2_CHALLENGE_LENGTH;
	286	else
	287	ch_len=SSL2_MAX_CHALLENGE_LENGTH;
	288
	289	/* write out sslv2 challenge */
	290	if (SSL3_RANDOM_SIZE < ch_len)
	291	i=SSL3_RANDOM_SIZE;
	292	else
	293	i=ch_len;
	294	s2n(i,d);
	295	memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
e7f97e2d	296	RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
d02b48c6 RE	297	memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
	298	p+=i;
	299
	300	i= p- &(buf[2]);
	301	buf[0]=((i>>8)&0xff)\|0x80;
	302	buf[1]=(i&0xff);
	303
	304	s->state=SSL23_ST_CW_CLNT_HELLO_B;
	305	/* number of bytes to write */
	306	s->init_num=i+2;
	307	s->init_off=0;
	308
	309	ssl3_finish_mac(s,&(buf[2]),i);
	310	}
	311
	312	/* SSL3_ST_CW_CLNT_HELLO_B */
cf82191d BM	313	ret = ssl23_write_bytes(s);
	314	if (ret >= 2)
	315	if (s->msg_callback)
	316	s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg); /* CLIENT-HELLO */
	317	return ret;
d02b48c6 RE	318	}
d02b48c6 RE	319
6b691a5c	320	static int ssl23_get_server_hello(SSL *s)
d02b48c6 RE	321	{
	322	char buf[8];
	323	unsigned char *p;
aa82db4f	324	int i;
d02b48c6	325	int n;
d02b48c6 RE	326
	327	n=ssl23_read_bytes(s,7);
	328
	329	if (n != 7) return(n);
	330	p=s->packet;
	331
	332	memcpy(buf,p,n);
	333
	334	if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
	335	(p[5] == 0x00) && (p[6] == 0x02))
	336	{
bc36ee62	337	#ifdef OPENSSL_NO_SSL2
aa82db4f UM	338	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	339	goto err;
	340	#else
d02b48c6 RE	341	/* we are talking sslv2 */
	342	/* we need to clean up the SSLv3 setup and put in the
	343	* sslv2 stuff. */
aa82db4f	344	int ch_len;
d02b48c6	345
58964a49 RE	346	if (s->options & SSL_OP_NO_SSLv2)
	347	{
	348	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	349	goto err;
	350	}
d02b48c6 RE	351	if (s->s2 == NULL)
	352	{
	353	if (!ssl2_new(s))
	354	goto err;
	355	}
	356	else
	357	ssl2_clear(s);
	358
58964a49	359	if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
d02b48c6 RE	360	ch_len=SSL2_CHALLENGE_LENGTH;
	361	else
	362	ch_len=SSL2_MAX_CHALLENGE_LENGTH;
	363
	364	/* write out sslv2 challenge */
	365	i=(SSL3_RANDOM_SIZE < ch_len)
	366	?SSL3_RANDOM_SIZE:ch_len;
	367	s->s2->challenge_length=i;
	368	memcpy(s->s2->challenge,
	369	&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
	370
	371	if (s->s3 != NULL) ssl3_free(s);
	372
54a656ef	373	if (!BUF_MEM_grow_clean(s->init_buf,
d02b48c6 RE	374	SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
	375	{
	376	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
	377	goto err;
	378	}
	379
	380	s->state=SSL2_ST_GET_SERVER_HELLO_A;
37569e64	381	if (!(s->client_version == SSL2_VERSION))
aa826d88	382	/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
37569e64	383	s->s2->ssl2_rollback=1;
d02b48c6 RE	384
	385	/* setup the 5 bytes we have read so we get them from
	386	* the sslv2 buffer */
	387	s->rstate=SSL_ST_READ_HEADER;
	388	s->packet_length=n;
	389	s->packet= &(s->s2->rbuf[0]);
	390	memcpy(s->packet,buf,n);
	391	s->s2->rbuf_left=n;
	392	s->s2->rbuf_offs=0;
	393
	394	/* we have already written one */
	395	s->s2->write_sequence=1;
	396
	397	s->method=SSLv2_client_method();
	398	s->handshake_func=s->method->ssl_connect;
aa82db4f	399	#endif
d02b48c6 RE	400	}
	401	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
	402	(p[1] == SSL3_VERSION_MAJOR) &&
58964a49 RE	403	((p[2] == SSL3_VERSION_MINOR) \|\|
58964a49 RE	404	(p[2] == TLS1_VERSION_MINOR)) &&
d02b48c6 RE	405	(p[5] == SSL3_MT_SERVER_HELLO))
d02b48c6 RE	406	{
58964a49	407	/* we have sslv3 or tls1 */
d02b48c6	408
58964a49	409	if (!ssl_init_wbio_buffer(s,1)) goto err;
d02b48c6 RE	410
	411	/* we are in this state */
	412	s->state=SSL3_ST_CR_SRVR_HELLO_A;
	413
	414	/* put the 5 bytes we have read into the input buffer
	415	* for SSLv3 */
	416	s->rstate=SSL_ST_READ_HEADER;
	417	s->packet_length=n;
	418	s->packet= &(s->s3->rbuf.buf[0]);
	419	memcpy(s->packet,buf,n);
	420	s->s3->rbuf.left=n;
	421	s->s3->rbuf.offset=0;
	422
58964a49 RE	423	if ((p[2] == SSL3_VERSION_MINOR) &&
	424	!(s->options & SSL_OP_NO_SSLv3))
	425	{
	426	s->version=SSL3_VERSION;
	427	s->method=SSLv3_client_method();
	428	}
	429	else if ((p[2] == TLS1_VERSION_MINOR) &&
	430	!(s->options & SSL_OP_NO_TLSv1))
	431	{
	432	s->version=TLS1_VERSION;
	433	s->method=TLSv1_client_method();
	434	}
	435	else
	436	{
	437	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	438	goto err;
	439	}
	440
d02b48c6 RE	441	s->handshake_func=s->method->ssl_connect;
	442	}
	443	else if ((p[0] == SSL3_RT_ALERT) &&
	444	(p[1] == SSL3_VERSION_MAJOR) &&
58964a49 RE	445	((p[2] == SSL3_VERSION_MINOR) \|\|
58964a49 RE	446	(p[2] == TLS1_VERSION_MINOR)) &&
d02b48c6 RE	447	(p[3] == 0) &&
	448	(p[4] == 2))
	449	{
45d87a1f	450	void (cb)(const SSL ssl,int type,int val)=NULL;
d02b48c6 RE	451	int j;
	452
	453	/* An alert */
	454	if (s->info_callback != NULL)
	455	cb=s->info_callback;
	456	else if (s->ctx->info_callback != NULL)
	457	cb=s->ctx->info_callback;
	458
	459	i=p[5];
	460	if (cb != NULL)
	461	{
	462	j=(i<<8)\|p[6];
	463	cb(s,SSL_CB_READ_ALERT,j);
	464	}
	465
	466	s->rwstate=SSL_NOTHING;
dfeab068	467	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
d02b48c6 RE	468	goto err;
	469	}
	470	else
	471	{
	472	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
	473	goto err;
	474	}
	475	s->init_num=0;
	476
	477	/* Since, if we are sending a ssl23 client hello, we are not
	478	* reusing a session-id */
	479	if (!ssl_get_new_session(s,0))
	480	goto err;
	481
	482	s->first_packet=1;
	483	return(SSL_connect(s));
	484	err:
	485	return(-1);
	486	}
	487