[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 const SSL_METHOD *ssl23_get_client_method(int ver);
static int ssl23_client_hello(SSL *s);
static int ssl23_get_server_hello(SSL *s);
static const 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);
	}

IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
			ssl_undefined_function,
			ssl23_connect,
			ssl23_get_client_method)

int ssl23_connect(SSL *s)
	{
	BUF_MEM *buf=NULL;
	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_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;
				buf=NULL;
				}

			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 (buf != NULL)
		BUF_MEM_free(buf);
	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,j,ch_len;
	unsigned long Time,l;
	int ssl2_compat;
	int version = 0, version_major, version_minor;
	SSL_COMP *comp;
	int ret;

	ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;

	if (!(s->options & SSL_OP_NO_TLSv1))
		{
		version = TLS1_VERSION;
		}
	else if (!(s->options & SSL_OP_NO_SSLv3))
		{
		version = SSL3_VERSION;
		}
	else if (!(s->options & SSL_OP_NO_SSLv2))
		{
		version = SSL2_VERSION;
		}

	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;
		Time=(unsigned long)time(NULL);		/* Time */
		l2n(Time,p);
		if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
			return -1;

		if (version == TLS1_VERSION)
			{
			version_major = TLS1_VERSION_MAJOR;
			version_minor = TLS1_VERSION_MINOR;
			}
		else if (version == SSL3_VERSION)
			{
			version_major = SSL3_VERSION_MAJOR;
			version_minor = SSL3_VERSION_MINOR;
			}
		else if (version == SSL2_VERSION)
			{
			version_major = SSL2_VERSION_MAJOR;
			version_minor = SSL2_VERSION_MINOR;
			}
		else
			{
			SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
			return(-1);
			}

		s->client_version = version;

		if (ssl2_compat)
			{
			/* create SSL 2.0 compatible Client Hello */

			/* two byte record header will be written last */
			d = &(buf[2]);
			p = d + 9; /* leave space for message type, version, individual length fields */

			*(d++) = SSL2_MT_CLIENT_HELLO;
			*(d++) = version_major;
			*(d++) = version_minor;
			
			/* Ciphers supported */
			i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
			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 length (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);
			if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
				return -1;

			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);

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

			ssl3_finish_mac(s,&(buf[2]),i);
			}
		else
			{
			/* create Client Hello in SSL 3.0/TLS 1.0 format */

			/* do the record header (5 bytes) and handshake message header (4 bytes) last */
			d = p = &(buf[9]);
			
			*(p++) = version_major;
			*(p++) = version_minor;

			/* Random stuff */
			memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
			p += SSL3_RANDOM_SIZE;

			/* Session ID (zero since there is no reuse) */
			*(p++) = 0;

			/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
			i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
			if (i == 0)
				{
				SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
				return -1;
				}
			s2n(i,p);
			p+=i;

			/* COMPRESSION */
#ifdef OPENSSL_NO_COMP
			*(p++)=1;
#else

			if ((s->options & SSL_OP_NO_COMPRESSION)
						|| !s->ctx->comp_methods)
				j=0;
			else
				j=sk_SSL_COMP_num(s->ctx->comp_methods);
			*(p++)=1+j;
			for (i=0; i<j; i++)
				{
				comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
				*(p++)=comp->id;
				}
#endif
			*(p++)=0; /* Add the NULL method */
#ifndef OPENSSL_NO_TLSEXT
			if ((p = ssl_add_ClientHello_TLS_extensions(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
			{
				SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
				return -1;
			}
#endif
			
			l = p-d;
			*p = 42;

			/* fill in 4-byte handshake header */
			d=&(buf[5]);
			*(d++)=SSL3_MT_CLIENT_HELLO;
			l2n3(l,d);

			l += 4;

			if (l > SSL3_RT_MAX_PLAIN_LENGTH)
				{
				SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
				return -1;
				}
			
			/* fill in 5-byte record header */
			d=buf;
			*(d++) = SSL3_RT_HANDSHAKE;
			*(d++) = version_major;
			*(d++) = version_minor; /* arguably we should send the *lowest* suported version here
			                         * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
			s2n((int)l,d);

			/* number of bytes to write */
			s->init_num=p-buf;
			s->init_off=0;

			ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
			}

		s->state=SSL23_ST_CW_CLNT_HELLO_B;
		s->init_off=0;
		}

	/* SSL3_ST_CW_CLNT_HELLO_B */
	ret = ssl23_write_bytes(s);

	if ((ret >= 2) && s->msg_callback)
		{
		/* Client Hello has been sent; tell msg_callback */

		if (ssl2_compat)
			s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
		else
			s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
		}

	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
4ebb342f	66	static const 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);
4ebb342f	69	static const 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
f3b656b2 DSH	83	IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
	84	ssl_undefined_function,
	85	ssl23_connect,
	86	ssl23_get_client_method)
d02b48c6	87
6b691a5c	88	int ssl23_connect(SSL *s)
d02b48c6	89	{
8d6ad9e3	90	BUF_MEM *buf=NULL;
7bbcb2f6	91	unsigned long Time=(unsigned long)time(NULL);
45d87a1f	92	void (cb)(const SSL ssl,int type,int val)=NULL;
d02b48c6 RE	93	int ret= -1;
	94	int new_state,state;
	95
eb952088	96	RAND_add(&Time,sizeof(Time),0);
d02b48c6	97	ERR_clear_error();
58964a49	98	clear_sys_error();
d02b48c6 RE	99
	100	if (s->info_callback != NULL)
	101	cb=s->info_callback;
	102	else if (s->ctx->info_callback != NULL)
	103	cb=s->ctx->info_callback;
	104
d02b48c6	105	s->in_handshake++;
979689aa	106	if (!SSL_in_init(s) \|\| SSL_in_before(s)) SSL_clear(s);
d02b48c6 RE	107
	108	for (;;)
	109	{
	110	state=s->state;
	111
	112	switch(s->state)
	113	{
	114	case SSL_ST_BEFORE:
	115	case SSL_ST_CONNECT:
	116	case SSL_ST_BEFORE\|SSL_ST_CONNECT:
	117	case SSL_ST_OK\|SSL_ST_CONNECT:
	118
413c4f45 MC	119	if (s->session != NULL)
	120	{
	121	SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
	122	ret= -1;
	123	goto end;
	124	}
	125	s->server=0;
d02b48c6 RE	126	if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
d02b48c6 RE	127
58964a49	128	/* s->version=TLS1_VERSION; */
d02b48c6 RE	129	s->type=SSL_ST_CONNECT;
	130
	131	if (s->init_buf == NULL)
	132	{
	133	if ((buf=BUF_MEM_new()) == NULL)
	134	{
	135	ret= -1;
	136	goto end;
	137	}
	138	if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
	139	{
	140	ret= -1;
	141	goto end;
	142	}
	143	s->init_buf=buf;
8d6ad9e3	144	buf=NULL;
d02b48c6 RE	145	}
	146
	147	if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
	148
	149	ssl3_init_finished_mac(s);
	150
	151	s->state=SSL23_ST_CW_CLNT_HELLO_A;
413c4f45	152	s->ctx->stats.sess_connect++;
d02b48c6 RE	153	s->init_num=0;
	154	break;
	155
	156	case SSL23_ST_CW_CLNT_HELLO_A:
	157	case SSL23_ST_CW_CLNT_HELLO_B:
	158
	159	s->shutdown=0;
	160	ret=ssl23_client_hello(s);
	161	if (ret <= 0) goto end;
	162	s->state=SSL23_ST_CR_SRVR_HELLO_A;
	163	s->init_num=0;
	164
	165	break;
	166
	167	case SSL23_ST_CR_SRVR_HELLO_A:
	168	case SSL23_ST_CR_SRVR_HELLO_B:
	169	ret=ssl23_get_server_hello(s);
	170	if (ret >= 0) cb=NULL;
	171	goto end;
dfeab068	172	/* break; */
d02b48c6 RE	173
	174	default:
	175	SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
	176	ret= -1;
	177	goto end;
	178	/* break; */
	179	}
	180
d58d092b	181	if (s->debug) { (void)BIO_flush(s->wbio); }
d02b48c6 RE	182
	183	if ((cb != NULL) && (s->state != state))
	184	{
	185	new_state=s->state;
	186	s->state=state;
	187	cb(s,SSL_CB_CONNECT_LOOP,1);
	188	s->state=new_state;
	189	}
	190	}
	191	end:
	192	s->in_handshake--;
8d6ad9e3 RL	193	if (buf != NULL)
8d6ad9e3 RL	194	BUF_MEM_free(buf);
d02b48c6 RE	195	if (cb != NULL)
	196	cb(s,SSL_CB_CONNECT_EXIT,ret);
	197	return(ret);
	198	}
	199
	200
6b691a5c	201	static int ssl23_client_hello(SSL *s)
d02b48c6 RE	202	{
	203	unsigned char *buf;
	204	unsigned char p,d;
c6c2e313 BM	205	int i,j,ch_len;
	206	unsigned long Time,l;
	207	int ssl2_compat;
	208	int version = 0, version_major, version_minor;
	209	SSL_COMP *comp;
cf82191d	210	int ret;
d02b48c6	211
c6c2e313 BM	212	ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
	213
	214	if (!(s->options & SSL_OP_NO_TLSv1))
	215	{
	216	version = TLS1_VERSION;
	217	}
	218	else if (!(s->options & SSL_OP_NO_SSLv3))
	219	{
	220	version = SSL3_VERSION;
	221	}
	222	else if (!(s->options & SSL_OP_NO_SSLv2))
	223	{
	224	version = SSL2_VERSION;
	225	}
	226
d02b48c6 RE	227	buf=(unsigned char *)s->init_buf->data;
	228	if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
	229	{
	230	#if 0
	231	/* don't reuse session-id's */
	232	if (!ssl_get_new_session(s,0))
	233	{
	234	return(-1);
	235	}
	236	#endif
	237
	238	p=s->s3->client_random;
7bbcb2f6	239	Time=(unsigned long)time(NULL); /* Time */
c6c2e313 BM	240	l2n(Time,p);
c6c2e313 BM	241	if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
7c7667b8	242	return -1;
d02b48c6	243
c6c2e313	244	if (version == TLS1_VERSION)
58964a49	245	{
c6c2e313 BM	246	version_major = TLS1_VERSION_MAJOR;
c6c2e313 BM	247	version_minor = TLS1_VERSION_MINOR;
58964a49	248	}
c6c2e313	249	else if (version == SSL3_VERSION)
58964a49	250	{
c6c2e313 BM	251	version_major = SSL3_VERSION_MAJOR;
c6c2e313 BM	252	version_minor = SSL3_VERSION_MINOR;
58964a49	253	}
c6c2e313	254	else if (version == SSL2_VERSION)
58964a49	255	{
c6c2e313 BM	256	version_major = SSL2_VERSION_MAJOR;
c6c2e313 BM	257	version_minor = SSL2_VERSION_MINOR;
58964a49 RE	258	}
	259	else
	260	{
	261	SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
	262	return(-1);
	263	}
d02b48c6	264
c6c2e313	265	s->client_version = version;
d02b48c6	266
c6c2e313 BM	267	if (ssl2_compat)
	268	{
	269	/* create SSL 2.0 compatible Client Hello */
	270
	271	/* two byte record header will be written last */
	272	d = &(buf[2]);
	273	p = d + 9; /* leave space for message type, version, individual length fields */
	274
	275	*(d++) = SSL2_MT_CLIENT_HELLO;
	276	*(d++) = version_major;
	277	*(d++) = version_minor;
	278
	279	/* Ciphers supported */
	280	i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
	281	if (i == 0)
	282	{
	283	/* no ciphers */
	284	SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
	285	return -1;
	286	}
	287	s2n(i,d);
	288	p+=i;
	289
	290	/* put in the session-id length (zero since there is no reuse) */
d02b48c6	291	#if 0
c6c2e313	292	s->session->session_id_length=0;
d02b48c6	293	#endif
c6c2e313 BM	294	s2n(0,d);
	295
	296	if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
	297	ch_len=SSL2_CHALLENGE_LENGTH;
	298	else
	299	ch_len=SSL2_MAX_CHALLENGE_LENGTH;
	300
	301	/* write out sslv2 challenge */
	302	if (SSL3_RANDOM_SIZE < ch_len)
	303	i=SSL3_RANDOM_SIZE;
	304	else
	305	i=ch_len;
	306	s2n(i,d);
	307	memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
	308	if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
	309	return -1;
	310
	311	memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
	312	p+=i;
	313
	314	i= p- &(buf[2]);
	315	buf[0]=((i>>8)&0xff)\|0x80;
	316	buf[1]=(i&0xff);
	317
	318	/* number of bytes to write */
	319	s->init_num=i+2;
	320	s->init_off=0;
	321
	322	ssl3_finish_mac(s,&(buf[2]),i);
	323	}
d02b48c6	324	else
c6c2e313 BM	325	{
c6c2e313 BM	326	/* create Client Hello in SSL 3.0/TLS 1.0 format */
d02b48c6	327
c6c2e313 BM	328	/* do the record header (5 bytes) and handshake message header (4 bytes) last */
	329	d = p = &(buf[9]);
	330
	331	*(p++) = version_major;
	332	*(p++) = version_minor;
	333
	334	/* Random stuff */
	335	memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
	336	p += SSL3_RANDOM_SIZE;
	337
	338	/* Session ID (zero since there is no reuse) */
	339	*(p++) = 0;
	340
	341	/* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
	342	i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
	343	if (i == 0)
	344	{
	345	SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
	346	return -1;
	347	}
	348	s2n(i,p);
	349	p+=i;
	350
	351	/* COMPRESSION */
ed3883d2 BM	352	#ifdef OPENSSL_NO_COMP
	353	*(p++)=1;
	354	#else
	355
566dda07 DSH	356	if ((s->options & SSL_OP_NO_COMPRESSION)
566dda07 DSH	357	\|\| !s->ctx->comp_methods)
c6c2e313 BM	358	j=0;
	359	else
	360	j=sk_SSL_COMP_num(s->ctx->comp_methods);
	361	*(p++)=1+j;
	362	for (i=0; i<j; i++)
	363	{
	364	comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
	365	*(p++)=comp->id;
	366	}
ed3883d2	367	#endif
c6c2e313	368	(p++)=0; / Add the NULL method */
ed3883d2 BM	369	#ifndef OPENSSL_NO_TLSEXT
	370	if ((p = ssl_add_ClientHello_TLS_extensions(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
	371	{
	372	SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
	373	return -1;
	374	}
	375	#endif
c6c2e313 BM	376
	377	l = p-d;
	378	*p = 42;
7c7667b8	379
c6c2e313 BM	380	/* fill in 4-byte handshake header */
	381	d=&(buf[5]);
	382	*(d++)=SSL3_MT_CLIENT_HELLO;
	383	l2n3(l,d);
d02b48c6	384
c6c2e313 BM	385	l += 4;
	386
	387	if (l > SSL3_RT_MAX_PLAIN_LENGTH)
	388	{
	389	SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
	390	return -1;
	391	}
	392
	393	/* fill in 5-byte record header */
	394	d=buf;
	395	*(d++) = SSL3_RT_HANDSHAKE;
	396	*(d++) = version_major;
	397	(d++) = version_minor; / arguably we should send the lowest suported version here
	398	* (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
	399	s2n((int)l,d);
	400
	401	/* number of bytes to write */
	402	s->init_num=p-buf;
	403	s->init_off=0;
	404
	405	ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
	406	}
d02b48c6 RE	407
d02b48c6 RE	408	s->state=SSL23_ST_CW_CLNT_HELLO_B;
d02b48c6	409	s->init_off=0;
d02b48c6 RE	410	}
	411
	412	/* SSL3_ST_CW_CLNT_HELLO_B */
cf82191d	413	ret = ssl23_write_bytes(s);
c6c2e313 BM	414
	415	if ((ret >= 2) && s->msg_callback)
	416	{
	417	/* Client Hello has been sent; tell msg_callback */
	418
	419	if (ssl2_compat)
3f19bbf4	420	s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
c6c2e313 BM	421	else
	422	s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
	423	}
	424
cf82191d	425	return ret;
d02b48c6 RE	426	}
d02b48c6 RE	427
6b691a5c	428	static int ssl23_get_server_hello(SSL *s)
d02b48c6 RE	429	{
	430	char buf[8];
	431	unsigned char *p;
aa82db4f	432	int i;
d02b48c6	433	int n;
d02b48c6 RE	434
	435	n=ssl23_read_bytes(s,7);
	436
	437	if (n != 7) return(n);
	438	p=s->packet;
	439
	440	memcpy(buf,p,n);
	441
	442	if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
	443	(p[5] == 0x00) && (p[6] == 0x02))
	444	{
bc36ee62	445	#ifdef OPENSSL_NO_SSL2
aa82db4f UM	446	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	447	goto err;
	448	#else
d02b48c6 RE	449	/* we are talking sslv2 */
	450	/* we need to clean up the SSLv3 setup and put in the
	451	* sslv2 stuff. */
aa82db4f	452	int ch_len;
d02b48c6	453
58964a49 RE	454	if (s->options & SSL_OP_NO_SSLv2)
	455	{
	456	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	457	goto err;
	458	}
d02b48c6 RE	459	if (s->s2 == NULL)
	460	{
	461	if (!ssl2_new(s))
	462	goto err;
	463	}
	464	else
	465	ssl2_clear(s);
	466
58964a49	467	if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
d02b48c6 RE	468	ch_len=SSL2_CHALLENGE_LENGTH;
	469	else
	470	ch_len=SSL2_MAX_CHALLENGE_LENGTH;
	471
	472	/* write out sslv2 challenge */
	473	i=(SSL3_RANDOM_SIZE < ch_len)
	474	?SSL3_RANDOM_SIZE:ch_len;
	475	s->s2->challenge_length=i;
	476	memcpy(s->s2->challenge,
	477	&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
	478
	479	if (s->s3 != NULL) ssl3_free(s);
	480
54a656ef	481	if (!BUF_MEM_grow_clean(s->init_buf,
d02b48c6 RE	482	SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
	483	{
	484	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
	485	goto err;
	486	}
	487
	488	s->state=SSL2_ST_GET_SERVER_HELLO_A;
37569e64	489	if (!(s->client_version == SSL2_VERSION))
aa826d88	490	/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
37569e64	491	s->s2->ssl2_rollback=1;
d02b48c6 RE	492
	493	/* setup the 5 bytes we have read so we get them from
	494	* the sslv2 buffer */
	495	s->rstate=SSL_ST_READ_HEADER;
	496	s->packet_length=n;
	497	s->packet= &(s->s2->rbuf[0]);
	498	memcpy(s->packet,buf,n);
	499	s->s2->rbuf_left=n;
	500	s->s2->rbuf_offs=0;
	501
	502	/* we have already written one */
	503	s->s2->write_sequence=1;
	504
	505	s->method=SSLv2_client_method();
	506	s->handshake_func=s->method->ssl_connect;
aa82db4f	507	#endif
d02b48c6 RE	508	}
	509	else if ((p[0] == SSL3_RT_HANDSHAKE) &&
	510	(p[1] == SSL3_VERSION_MAJOR) &&
58964a49 RE	511	((p[2] == SSL3_VERSION_MINOR) \|\|
58964a49 RE	512	(p[2] == TLS1_VERSION_MINOR)) &&
d02b48c6 RE	513	(p[5] == SSL3_MT_SERVER_HELLO))
d02b48c6 RE	514	{
58964a49	515	/* we have sslv3 or tls1 */
d02b48c6	516
58964a49	517	if (!ssl_init_wbio_buffer(s,1)) goto err;
d02b48c6 RE	518
	519	/* we are in this state */
	520	s->state=SSL3_ST_CR_SRVR_HELLO_A;
	521
	522	/* put the 5 bytes we have read into the input buffer
	523	* for SSLv3 */
	524	s->rstate=SSL_ST_READ_HEADER;
	525	s->packet_length=n;
	526	s->packet= &(s->s3->rbuf.buf[0]);
	527	memcpy(s->packet,buf,n);
	528	s->s3->rbuf.left=n;
	529	s->s3->rbuf.offset=0;
	530
58964a49 RE	531	if ((p[2] == SSL3_VERSION_MINOR) &&
	532	!(s->options & SSL_OP_NO_SSLv3))
	533	{
	534	s->version=SSL3_VERSION;
	535	s->method=SSLv3_client_method();
	536	}
	537	else if ((p[2] == TLS1_VERSION_MINOR) &&
	538	!(s->options & SSL_OP_NO_TLSv1))
	539	{
	540	s->version=TLS1_VERSION;
	541	s->method=TLSv1_client_method();
	542	}
	543	else
	544	{
	545	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
	546	goto err;
	547	}
	548
d02b48c6 RE	549	s->handshake_func=s->method->ssl_connect;
	550	}
	551	else if ((p[0] == SSL3_RT_ALERT) &&
	552	(p[1] == SSL3_VERSION_MAJOR) &&
58964a49 RE	553	((p[2] == SSL3_VERSION_MINOR) \|\|
58964a49 RE	554	(p[2] == TLS1_VERSION_MINOR)) &&
d02b48c6 RE	555	(p[3] == 0) &&
	556	(p[4] == 2))
	557	{
45d87a1f	558	void (cb)(const SSL ssl,int type,int val)=NULL;
d02b48c6 RE	559	int j;
	560
	561	/* An alert */
	562	if (s->info_callback != NULL)
	563	cb=s->info_callback;
	564	else if (s->ctx->info_callback != NULL)
	565	cb=s->ctx->info_callback;
	566
	567	i=p[5];
	568	if (cb != NULL)
	569	{
	570	j=(i<<8)\|p[6];
	571	cb(s,SSL_CB_READ_ALERT,j);
	572	}
	573
	574	s->rwstate=SSL_NOTHING;
dfeab068	575	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
d02b48c6 RE	576	goto err;
	577	}
	578	else
	579	{
	580	SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
	581	goto err;
	582	}
	583	s->init_num=0;
	584
	585	/* Since, if we are sending a ssl23 client hello, we are not
	586	* reusing a session-id */
	587	if (!ssl_get_new_session(s,0))
	588	goto err;
	589
	590	s->first_packet=1;
	591	return(SSL_connect(s));
	592	err:
	593	return(-1);
	594	}
	595