/* 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.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include "ssl_locl.h"

#include <openssl/buffer.h>

#include <openssl/rand.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libssl_wsd.h"

#endif

#ifdef EMULATOR

	GET_STATIC_VAR_FROM_TLS(SSLv23_client_method_data,s23_clnt,SSL_METHOD)

	#define SSLv23_client_method_data (*GET_WSD_VAR_NAME(SSLv23_client_method_data,s23_clnt,s)())

#endif 

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);

	}

EXPORT_C 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 */

			if (s->ctx->comp_methods == NULL)

				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;

				}

			*(p++)=0; /* Add the NULL method */

			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;

	return(SSL_connect(s));

err:

	return(-1);

	}