/* ssl/s2_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.]

  */

 /* ====================================================================

  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.

  *

  * 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 above 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 acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

  *

  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

  *    endorse or promote products derived from this software without

  *    prior written permission. For written permission, please contact

  *    openssl-core@openssl.org.

  *

  * 5. Products derived from this software may not be called "OpenSSL"

  *    nor may "OpenSSL" appear in their names without prior written

  *    permission of the OpenSSL Project.

  *

  * 6. Redistributions of any form whatsoever must retain the following

  *    acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

  *

  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

  * EXPRESSED 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 OpenSSL PROJECT OR

  * ITS 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.

  * ====================================================================

  *

  * This product includes cryptographic software written by Eric Young

  * (eay@cryptsoft.com).  This product includes software written by Tim

  * Hudson (tjh@cryptsoft.com).

  *

  */

 /*

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

  */

 #include "ssl_locl.h"

 #ifndef OPENSSL_NO_SSL2

 #include <stdio.h>

 #include <openssl/rand.h>

 #include <openssl/buffer.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(SSLv2_client_method_data,s2_clnt,SSL_METHOD)

 	#define SSLv2_client_method_data (*GET_WSD_VAR_NAME(SSLv2_client_method_data,s2_clnt,s)())

 #endif

 static SSL_METHOD *ssl2_get_client_method(int ver);

 static int get_server_finished(SSL *s);

 static int get_server_verify(SSL *s);

 static int get_server_hello(SSL *s);

 static int client_hello(SSL *s); 

 static int client_master_key(SSL *s);

 static int client_finished(SSL *s);

 static int client_certificate(SSL *s);

 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,

 	unsigned char *to,int padding);

 #define BREAK	break

 static SSL_METHOD *ssl2_get_client_method(int ver)

 	{

 	if (ver == SSL2_VERSION)

 		return(SSLv2_client_method());

 	else

 		return(NULL);

 	}

 EXPORT_C IMPLEMENT_ssl2_meth_func(SSLv2_client_method,

 			ssl_undefined_function,

 			ssl2_connect,

 			ssl2_get_client_method)

 int ssl2_connect(SSL *s)

 	{

 	unsigned long l=(unsigned long)time(NULL);

 	BUF_MEM *buf=NULL;

 	int ret= -1;

 	void (*cb)(const SSL *ssl,int type,int val)=NULL;

 	int new_state,state;

 	RAND_add(&l,sizeof(l),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;

 	/* init things to blank */

 	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:

 			s->server=0;

 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

 			s->version=SSL2_VERSION;

 			s->type=SSL_ST_CONNECT;

 			buf=s->init_buf;

 			if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))

 				{

 				ret= -1;

 				goto end;

 				}

 			if (!BUF_MEM_grow(buf,

 				SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))

 				{

 				if (buf == s->init_buf)

 					buf=NULL;

 				ret= -1;

 				goto end;

 				}

 			s->init_buf=buf;

 			buf=NULL;

 			s->init_num=0;

 			s->state=SSL2_ST_SEND_CLIENT_HELLO_A;

 			s->ctx->stats.sess_connect++;

 			s->handshake_func=ssl2_connect;

 			BREAK;

 		case SSL2_ST_SEND_CLIENT_HELLO_A:

 		case SSL2_ST_SEND_CLIENT_HELLO_B:

 			s->shutdown=0;

 			ret=client_hello(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			s->state=SSL2_ST_GET_SERVER_HELLO_A;

 			BREAK;

 		case SSL2_ST_GET_SERVER_HELLO_A:

 		case SSL2_ST_GET_SERVER_HELLO_B:

 			ret=get_server_hello(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			if (!s->hit) /* new session */

 				{

 				s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;

 				BREAK; 

 				}

 			else

 				{

 				s->state=SSL2_ST_CLIENT_START_ENCRYPTION;

 				break;

 				}

 		case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:

 		case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:

 			ret=client_master_key(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			s->state=SSL2_ST_CLIENT_START_ENCRYPTION;

 			break;

 		case SSL2_ST_CLIENT_START_ENCRYPTION:

 			/* Ok, we now have all the stuff needed to

 			 * start encrypting, so lets fire it up :-) */

 			if (!ssl2_enc_init(s,1))

 				{

 				ret= -1;

 				goto end;

 				}

 			s->s2->clear_text=0;

 			s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;

 			break;

 		case SSL2_ST_SEND_CLIENT_FINISHED_A:

 		case SSL2_ST_SEND_CLIENT_FINISHED_B:

 			ret=client_finished(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			s->state=SSL2_ST_GET_SERVER_VERIFY_A;

 			break;

 		case SSL2_ST_GET_SERVER_VERIFY_A:

 		case SSL2_ST_GET_SERVER_VERIFY_B:

 			ret=get_server_verify(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			s->state=SSL2_ST_GET_SERVER_FINISHED_A;

 			break;

 		case SSL2_ST_GET_SERVER_FINISHED_A:

 		case SSL2_ST_GET_SERVER_FINISHED_B:

 			ret=get_server_finished(s);

 			if (ret <= 0) goto end;

 			break;

 		case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:

 		case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:

 		case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:

 		case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:

 		case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:

 			ret=client_certificate(s);

 			if (ret <= 0) goto end;

 			s->init_num=0;

 			s->state=SSL2_ST_GET_SERVER_FINISHED_A;

 			break;

 		case SSL_ST_OK:

 			if (s->init_buf != NULL)

 				{

 				BUF_MEM_free(s->init_buf);

 				s->init_buf=NULL;

 				}

 			s->init_num=0;

 		/*	ERR_clear_error();*/

 			/* If we want to cache session-ids in the client

 			 * and we successfully add the session-id to the

 			 * cache, and there is a callback, then pass it out.

 			 * 26/11/96 - eay - only add if not a re-used session.

 			 */

 			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

 			if (s->hit) s->ctx->stats.sess_hit++;

 			ret=1;

 			/* s->server=0; */

 			s->ctx->stats.sess_connect_good++;

 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);

 			goto end;

 			/* break; */

 		default:

 			SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);

 			return(-1);

 			/* break; */

 			}

 		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 get_server_hello(SSL *s)

 	{

 	unsigned char *buf;

 	unsigned char *p;

 	int i,j;

 	unsigned long len;

 	STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;

 	buf=(unsigned char *)s->init_buf->data;

 	p=buf;

 	if (s->state == SSL2_ST_GET_SERVER_HELLO_A)

 		{

 		i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);

 		if (i < (11-s->init_num)) 

 			return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));

 		s->init_num = 11;

 		if (*(p++) != SSL2_MT_SERVER_HELLO)

 			{

 			if (p[-1] != SSL2_MT_ERROR)

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				SSLerr(SSL_F_GET_SERVER_HELLO,

 					SSL_R_READ_WRONG_PACKET_TYPE);

 				}

 			else

 				SSLerr(SSL_F_GET_SERVER_HELLO,

 					SSL_R_PEER_ERROR);

 			return(-1);

 			}

 #ifdef __APPLE_CC__

 		/* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug

 		 * workaround. <appro@fy.chalmers.se> */

 		s->hit=(i=*(p++))?1:0;

 #else

 		s->hit=(*(p++))?1:0;

 #endif

 		s->s2->tmp.cert_type= *(p++);

 		n2s(p,i);

 		if (i < s->version) s->version=i;

 		n2s(p,i); s->s2->tmp.cert_length=i;

 		n2s(p,i); s->s2->tmp.csl=i;

 		n2s(p,i); s->s2->tmp.conn_id_length=i;

 		s->state=SSL2_ST_GET_SERVER_HELLO_B;

 		}

 	/* SSL2_ST_GET_SERVER_HELLO_B */

 	len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;

 	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)

 		{

 		SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);

 		return -1;

 		}

 	j = (int)len - s->init_num;

 	i = ssl2_read(s,(char *)&(buf[s->init_num]),j);

 	if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));

 	if (s->msg_callback)

 		s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */

 	/* things are looking good */

 	p = buf + 11;

 	if (s->hit)

 		{

 		if (s->s2->tmp.cert_length != 0) 

 			{

 			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);

 			return(-1);

 			}

 		if (s->s2->tmp.cert_type != 0)

 			{

 			if (!(s->options &

 				SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))

 				{

 				SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);

 				return(-1);

 				}

 			}

 		if (s->s2->tmp.csl != 0)

 			{

 			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);

 			return(-1);

 			}

 		}

 	else

 		{

 #ifdef undef

 		/* very bad */

 		memset(s->session->session_id,0,

 			SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);

 		s->session->session_id_length=0;

 		*/

 #endif

 		/* we need to do this in case we were trying to reuse a 

 		 * client session but others are already reusing it.

 		 * If this was a new 'blank' session ID, the session-id

 		 * length will still be 0 */

 		if (s->session->session_id_length > 0)

 			{

 			if (!ssl_get_new_session(s,0))

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				return(-1);

 				}

 			}

 		if (ssl2_set_certificate(s,s->s2->tmp.cert_type,

 			s->s2->tmp.cert_length,p) <= 0)

 			{

 			ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);

 			return(-1);

 			}

 		p+=s->s2->tmp.cert_length;

 		if (s->s2->tmp.csl == 0)

 			{

 			ssl2_return_error(s,SSL2_PE_NO_CIPHER);

 			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);

 			return(-1);

 			}

 		/* We have just received a list of ciphers back from the

 		 * server.  We need to get the ones that match, then select

 		 * the one we want the most :-). */

 		/* load the ciphers */

 		sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,

 					    &s->session->ciphers);

 		p+=s->s2->tmp.csl;

 		if (sk == NULL)

 			{

 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);

 			return(-1);

 			}

 		(void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);

 		/* get the array of ciphers we will accept */

 		cl=SSL_get_ciphers(s);

 		(void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);

 		/*

 		 * If server preference flag set, choose the first

 		 * (highest priority) cipher the server sends, otherwise

 		 * client preference has priority.

 		 */

 		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)

 		    {

 		    prio = sk;

 		    allow = cl;

 		    }

 		else

 		    {

 		    prio = cl;

 		    allow = sk;

 		    }

 		/* In theory we could have ciphers sent back that we

 		 * don't want to use but that does not matter since we

 		 * will check against the list we originally sent and

 		 * for performance reasons we should not bother to match

 		 * the two lists up just to check. */

 		for (i=0; i<sk_SSL_CIPHER_num(prio); i++)

 			{

 			if (sk_SSL_CIPHER_find(allow,

 					     sk_SSL_CIPHER_value(prio,i)) >= 0)

 				break;

 			}

 		if (i >= sk_SSL_CIPHER_num(prio))

 			{

 			ssl2_return_error(s,SSL2_PE_NO_CIPHER);

 			SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);

 			return(-1);

 			}

 		s->session->cipher=sk_SSL_CIPHER_value(prio,i);

 		if (s->session->peer != NULL) /* can't happen*/

 			{

 			ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);

 			return(-1);

 			}

 		s->session->peer = s->session->sess_cert->peer_key->x509;

 		/* peer_key->x509 has been set by ssl2_set_certificate. */

 		CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);

 		}

 	if (s->session->sess_cert == NULL 

       || s->session->peer != s->session->sess_cert->peer_key->x509)

 		/* can't happen */

 		{

 		ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);

 		SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);

 		return(-1);

 		}

 	s->s2->conn_id_length=s->s2->tmp.conn_id_length;

 	if (s->s2->conn_id_length > sizeof s->s2->conn_id)

 		{

 		ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);

 		SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);

 		return -1;

 		}

 	memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);

 	return(1);

 	}

 static int client_hello(SSL *s)

 	{

 	unsigned char *buf;

 	unsigned char *p,*d;

 /*	CIPHER **cipher;*/

 	int i,n,j;

 	buf=(unsigned char *)s->init_buf->data;

 	if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)

 		{

 		if ((s->session == NULL) ||

 			(s->session->ssl_version != s->version))

 			{

 			if (!ssl_get_new_session(s,0))

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				return(-1);

 				}

 			}

 		/* else use the pre-loaded session */

 		p=buf;					/* header */

 		d=p+9;					/* data section */

 		*(p++)=SSL2_MT_CLIENT_HELLO;		/* type */

 		s2n(SSL2_VERSION,p);			/* version */

 		n=j=0;

 		n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);

 		d+=n;

 		if (n == 0)

 			{

 			SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);

 			return(-1);

 			}

 		s2n(n,p);			/* cipher spec num bytes */

 		if ((s->session->session_id_length > 0) &&

 			(s->session->session_id_length <=

 			SSL2_MAX_SSL_SESSION_ID_LENGTH))

 			{

 			i=s->session->session_id_length;

 			s2n(i,p);		/* session id length */

 			memcpy(d,s->session->session_id,(unsigned int)i);

 			d+=i;

 			}

 		else

 			{

 			s2n(0,p);

 			}

 		s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;

 		s2n(SSL2_CHALLENGE_LENGTH,p);		/* challenge length */

 		/*challenge id data*/

 		if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)

 			return -1;

 		memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);

 		d+=SSL2_CHALLENGE_LENGTH;

 		s->state=SSL2_ST_SEND_CLIENT_HELLO_B;

 		s->init_num=d-buf;

 		s->init_off=0;

 		}

 	/* SSL2_ST_SEND_CLIENT_HELLO_B */

 	return(ssl2_do_write(s));

 	}

 static int client_master_key(SSL *s)

 	{

 	unsigned char *buf;

 	unsigned char *p,*d;

 	int clear,enc,karg,i;

 	SSL_SESSION *sess;

 	const EVP_CIPHER *c;

 	const EVP_MD *md;

 	buf=(unsigned char *)s->init_buf->data;

 	if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)

 		{

 		if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))

 			{

 			ssl2_return_error(s,SSL2_PE_NO_CIPHER);

 			SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);

 			return(-1);

 			}

 		sess=s->session;

 		p=buf;

 		d=p+10;

 		*(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */

 		i=ssl_put_cipher_by_char(s,sess->cipher,p);

 		p+=i;

 		/* make key_arg data */

 		i=EVP_CIPHER_iv_length(c);

 		sess->key_arg_length=i;

 		if (i > SSL_MAX_KEY_ARG_LENGTH)

 			{

 			ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);

 			return -1;

 			}

 		if (i > 0)

 			if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)

 				return -1;

 		/* make a master key */

 		i=EVP_CIPHER_key_length(c);

 		sess->master_key_length=i;

 		if (i > 0)

 			{

 			if (i > (int)sizeof(sess->master_key))

 				{

 				ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);

 				SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);

 				return -1;

 				}

 			if (RAND_bytes(sess->master_key,i) <= 0)

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				return(-1);

 				}

 			}

 		if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)

 			enc=8;

 		else if (SSL_C_IS_EXPORT(sess->cipher))

 			enc=5;

 		else

 			enc=i;

 		if ((int)i < enc)

 			{

 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);

 			return(-1);

 			}

 		clear=i-enc;

 		s2n(clear,p);

 		memcpy(d,sess->master_key,(unsigned int)clear);

 		d+=clear;

 		enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,

 			&(sess->master_key[clear]),d,

 			(s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);

 		if (enc <= 0)

 			{

 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);

 			return(-1);

 			}

 #ifdef PKCS1_CHECK

 		if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;

 		if (s->options & SSL_OP_PKCS1_CHECK_2)

 			sess->master_key[clear]++;

 #endif

 		s2n(enc,p);

 		d+=enc;

 		karg=sess->key_arg_length;	

 		s2n(karg,p); /* key arg size */

 		if (karg > (int)sizeof(sess->key_arg))

 			{

 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 			SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);

 			return -1;

 			}

 		memcpy(d,sess->key_arg,(unsigned int)karg);

 		d+=karg;

 		s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;

 		s->init_num=d-buf;

 		s->init_off=0;

 		}

 	/* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */

 	return(ssl2_do_write(s));

 	}

 static int client_finished(SSL *s)

 	{

 	unsigned char *p;

 	if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)

 		{

 		p=(unsigned char *)s->init_buf->data;

 		*(p++)=SSL2_MT_CLIENT_FINISHED;

 		if (s->s2->conn_id_length > sizeof s->s2->conn_id)

 			{

 			SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);

 			return -1;

 			}

 		memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);

 		s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;

 		s->init_num=s->s2->conn_id_length+1;

 		s->init_off=0;

 		}

 	return(ssl2_do_write(s));

 	}

 /* read the data and then respond */

 static int client_certificate(SSL *s)

 	{

 	unsigned char *buf;

 	unsigned char *p,*d;

 	int i;

 	unsigned int n;

 	int cert_ch_len;

 	unsigned char *cert_ch;

 	buf=(unsigned char *)s->init_buf->data;

 	/* We have a cert associated with the SSL, so attach it to

 	 * the session if it does not have one */

 	if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)

 		{

 		i=ssl2_read(s,(char *)&(buf[s->init_num]),

 			SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);

 		if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))

 			return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));

 		s->init_num += i;

 		if (s->msg_callback)

 			s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */

 		/* type=buf[0]; */

 		/* type eq x509 */

 		if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)

 			{

 			ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);

 			SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);

 			return(-1);

 			}

 		if ((s->cert == NULL) ||

 			(s->cert->key->x509 == NULL) ||

 			(s->cert->key->privatekey == NULL))

 			{

 			s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;

 			}

 		else

 			s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;

 		}

 	cert_ch = buf + 2;

 	cert_ch_len = s->init_num - 2;

 	if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)

 		{

 		X509 *x509=NULL;

 		EVP_PKEY *pkey=NULL;

 		/* If we get an error we need to

 		 * ssl->rwstate=SSL_X509_LOOKUP;

 		 * return(error);

 		 * We should then be retried when things are ok and we

 		 * can get a cert or not */

 		i=0;

 		if (s->ctx->client_cert_cb != NULL)

 			{

 			i=s->ctx->client_cert_cb(s,&(x509),&(pkey));

 			}

 		if (i < 0)

 			{

 			s->rwstate=SSL_X509_LOOKUP;

 			return(-1);

 			}

 		s->rwstate=SSL_NOTHING;

 		if ((i == 1) && (pkey != NULL) && (x509 != NULL))

 			{

 			s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;

 			if (	!SSL_use_certificate(s,x509) || 

 				!SSL_use_PrivateKey(s,pkey))

 				{

 				i=0;

 				}

 			X509_free(x509);

 			EVP_PKEY_free(pkey);

 			}

 		else if (i == 1)

 			{

 			if (x509 != NULL) X509_free(x509);

 			if (pkey != NULL) EVP_PKEY_free(pkey);

 			SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);

 			i=0;

 			}

 		if (i == 0)

 			{

 			/* We have no client certificate to respond with

 			 * so send the correct error message back */

 			s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;

 			p=buf;

 			*(p++)=SSL2_MT_ERROR;

 			s2n(SSL2_PE_NO_CERTIFICATE,p);

 			s->init_off=0;

 			s->init_num=3;

 			/* Write is done at the end */

 			}

 		}

 	if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)

 		{

 		return(ssl2_do_write(s));

 		}

 	if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)

 		{

 		EVP_MD_CTX ctx;

 		/* ok, now we calculate the checksum

 		 * do it first so we can reuse buf :-) */

 		p=buf;

 		EVP_MD_CTX_init(&ctx);

 		EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);

 		EVP_SignUpdate(&ctx,s->s2->key_material,

 			       s->s2->key_material_length);

 		EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);

 		n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);

 		EVP_SignUpdate(&ctx,buf,(unsigned int)n);

 		p=buf;

 		d=p+6;

 		*(p++)=SSL2_MT_CLIENT_CERTIFICATE;

 		*(p++)=SSL2_CT_X509_CERTIFICATE;

 		n=i2d_X509(s->cert->key->x509,&d);

 		s2n(n,p);

 		if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))

 			{

 			/* this is not good.  If things have failed it

 			 * means there so something wrong with the key.

 			 * We will continue with a 0 length signature

 			 */

 			}

 		EVP_MD_CTX_cleanup(&ctx);

 		s2n(n,p);

 		d+=n;

 		s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;

 		s->init_num=d-buf;

 		s->init_off=0;

 		}

 	/* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */

 	return(ssl2_do_write(s));

 	}

 static int get_server_verify(SSL *s)

 	{

 	unsigned char *p;

 	int i, n, len;

 	p=(unsigned char *)s->init_buf->data;

 	if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)

 		{

 		i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);

 		if (i < (1-s->init_num)) 

 			return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));

 		s->init_num += i;

 		s->state= SSL2_ST_GET_SERVER_VERIFY_B;

 		if (*p != SSL2_MT_SERVER_VERIFY)

 			{

 			if (p[0] != SSL2_MT_ERROR)

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				SSLerr(SSL_F_GET_SERVER_VERIFY,

 					SSL_R_READ_WRONG_PACKET_TYPE);

 				}

 			else

 				{

 				SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);

 				/* try to read the error message */

 				i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);

 				return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);

 				}

 			return(-1);

 			}

 		}

 	p=(unsigned char *)s->init_buf->data;

 	len = 1 + s->s2->challenge_length;

 	n =  len - s->init_num;

 	i = ssl2_read(s,(char *)&(p[s->init_num]),n);

 	if (i < n)

 		return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));

 	if (s->msg_callback)

 		s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */

 	p += 1;

 	if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)

 		{

 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 		SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);

 		return(-1);

 		}

 	return(1);

 	}

 static int get_server_finished(SSL *s)

 	{

 	unsigned char *buf;

 	unsigned char *p;

 	int i, n, len;

 	buf=(unsigned char *)s->init_buf->data;

 	p=buf;

 	if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)

 		{

 		i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);

 		if (i < (1-s->init_num))

 			return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));

 		s->init_num += i;

 		if (*p == SSL2_MT_REQUEST_CERTIFICATE)

 			{

 			s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;

 			return(1);

 			}

 		else if (*p != SSL2_MT_SERVER_FINISHED)

 			{

 			if (p[0] != SSL2_MT_ERROR)

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);

 				}

 			else

 				{

 				SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);

 				/* try to read the error message */

 				i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);

 				return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);

 				}

 			return(-1);

 			}

 		s->state=SSL2_ST_GET_SERVER_FINISHED_B;

 		}

 	len = 1 + SSL2_SSL_SESSION_ID_LENGTH;

 	n = len - s->init_num;

 	i = ssl2_read(s,(char *)&(buf[s->init_num]), n);

 	if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */

 		return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));

 	s->init_num += i;

 	if (s->msg_callback)

 		s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */

 	if (!s->hit) /* new session */

 		{

 		/* new session-id */

 		/* Make sure we were not trying to re-use an old SSL_SESSION

 		 * or bad things can happen */

 		/* ZZZZZZZZZZZZZ */

 		s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;

 		memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);

 		}

 	else

 		{

 		if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))

 			{

 			if ((s->session->session_id_length > sizeof s->session->session_id)

 			    || (0 != memcmp(buf + 1, s->session->session_id,

 			                    (unsigned int)s->session->session_id_length)))

 				{

 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);

 				SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);

 				return(-1);

 				}

 			}

 		}

 	s->state = SSL_ST_OK;

 	return(1);

 	}

 /* loads in the certificate from the server */

 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)

 	{

 	STACK_OF(X509) *sk=NULL;

 	EVP_PKEY *pkey=NULL;

 	SESS_CERT *sc=NULL;

 	int i;

 	X509 *x509=NULL;

 	int ret=0;

 	x509=d2i_X509(NULL,&data,(long)len);

 	if (x509 == NULL)

 		{

 		SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);

 		goto err;

 		}

 	if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))

 		{

 		SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	i=ssl_verify_cert_chain(s,sk);

 	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))

 		{

 		SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);

 		goto err;

 		}

 	ERR_clear_error(); /* but we keep s->verify_result */

 	s->session->verify_result = s->verify_result;

 	/* server's cert for this session */

 	sc=ssl_sess_cert_new();

 	if (sc == NULL)

 		{

 		ret= -1;

 		goto err;

 		}

 	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);

 	s->session->sess_cert=sc;

 	sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;

 	sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);

 	pkey=X509_get_pubkey(x509);

 	x509=NULL;

 	if (pkey == NULL)

 		{

 		SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);

 		goto err;

 		}

 	if (pkey->type != EVP_PKEY_RSA)

 		{

 		SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);

 		goto err;

 		}

 	if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))

 		goto err;

 	ret=1;

 err:

 	sk_X509_free(sk);

 	X509_free(x509);

 	EVP_PKEY_free(pkey);

 	return(ret);

 	}

 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,

 	     unsigned char *to, int padding)

 	{

 	EVP_PKEY *pkey=NULL;

 	int i= -1;

 	if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||

 		((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))

 		{

 		SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);

 		return(-1);

 		}

 	if (pkey->type != EVP_PKEY_RSA)

 		{

 		SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);

 		goto end;

 		}

 	/* we have the public key */

 	i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);

 	if (i < 0)

 		SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);

 end:

 	EVP_PKEY_free(pkey);

 	return(i);

 	}

 #else /* !OPENSSL_NO_SSL2 */

 # if PEDANTIC

 static void *dummy=&dummy;

 # endif

 #endif