/* 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);

 	}