1 /* ssl/s3_clnt.c */

     2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

     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  * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.

    60  *

    61  * Redistribution and use in source and binary forms, with or without

    62  * modification, are permitted provided that the following conditions

    63  * are met:

    64  *

    65  * 1. Redistributions of source code must retain the above copyright

    66  *    notice, this list of conditions and the following disclaimer. 

    67  *

    68  * 2. Redistributions in binary form must reproduce the above copyright

    69  *    notice, this list of conditions and the following disclaimer in

    70  *    the documentation and/or other materials provided with the

    71  *    distribution.

    72  *

    73  * 3. All advertising materials mentioning features or use of this

    74  *    software must display the following acknowledgment:

    75  *    "This product includes software developed by the OpenSSL Project

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

    77  *

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

    79  *    endorse or promote products derived from this software without

    80  *    prior written permission. For written permission, please contact

    81  *    openssl-core@openssl.org.

    82  *

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

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

    85  *    permission of the OpenSSL Project.

    86  *

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

    88  *    acknowledgment:

    89  *    "This product includes software developed by the OpenSSL Project

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

    91  *

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

    93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

    96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

    98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

   100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

   101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

   102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

   103  * OF THE POSSIBILITY OF SUCH DAMAGE.

   104  * ====================================================================

   105  *

   106  * This product includes cryptographic software written by Eric Young

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

   108  * Hudson (tjh@cryptsoft.com).

   109  *

   110  */

   111 /* ====================================================================

   112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.

   113  *

   114  * Portions of the attached software ("Contribution") are developed by 

   115  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.

   116  *

   117  * The Contribution is licensed pursuant to the OpenSSL open source

   118  * license provided above.

   119  *

   120  * ECC cipher suite support in OpenSSL originally written by

   121  * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.

   122  *

   123  */

   124 /*

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

   126  */

   127  

   128 #include <stdio.h>

   129 #include "ssl_locl.h"

   130 #include "kssl_lcl.h"

   131 #include <openssl/buffer.h>

   132 #include <openssl/rand.h>

   133 #include <openssl/objects.h>

   134 #include <openssl/evp.h>

   135 #include <openssl/md5.h>

   136 #ifndef OPENSSL_NO_DH

   137 #include <openssl/dh.h>

   138 #endif

   139 #include <openssl/bn.h>

   140 

   141 

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

   143 #include "libssl_wsd.h"

   144 #endif

   145 

   146 

   147 #ifdef EMULATOR

   148 

   149 	GET_STATIC_VAR_FROM_TLS(SSLv3_client_method_data,s3_clnt,SSL_METHOD)

   150 	

   151 	#define SSLv3_client_method_data (*GET_WSD_VAR_NAME(SSLv3_client_method_data,s3_clnt,s)())

   152 	

   153 #endif

   154 

   155 static SSL_METHOD *ssl3_get_client_method(int ver);

   156 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);

   157 

   158 #ifndef OPENSSL_NO_ECDH

   159 static int curve_id2nid(int curve_id);

   160 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);

   161 #endif

   162 

   163 static SSL_METHOD *ssl3_get_client_method(int ver)

   164 	{

   165 	if (ver == SSL3_VERSION)

   166 		return(SSLv3_client_method());

   167 	else

   168 		return(NULL);

   169 	}

   170 

   171 EXPORT_C IMPLEMENT_ssl3_meth_func(SSLv3_client_method,

   172 			ssl_undefined_function,

   173 			ssl3_connect,

   174 			ssl3_get_client_method)

   175 

   176 int ssl3_connect(SSL *s)

   177 	{

   178 	BUF_MEM *buf=NULL;

   179 	unsigned long Time=(unsigned long)time(NULL),l;

   180 	long num1;

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

   182 	int ret= -1;

   183 	int new_state,state,skip=0;;

   184 

   185 	RAND_add(&Time,sizeof(Time),0);

   186 	ERR_clear_error();

   187 	clear_sys_error();

   188 

   189 	if (s->info_callback != NULL)

   190 		cb=s->info_callback;

   191 	else if (s->ctx->info_callback != NULL)

   192 		cb=s->ctx->info_callback;

   193 	

   194 	s->in_handshake++;

   195 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 

   196 

   197 	for (;;)

   198 		{

   199 		state=s->state;

   200 

   201 		switch(s->state)

   202 			{

   203 		case SSL_ST_RENEGOTIATE:

   204 			s->new_session=1;

   205 			s->state=SSL_ST_CONNECT;

   206 			s->ctx->stats.sess_connect_renegotiate++;

   207 			/* break */

   208 		case SSL_ST_BEFORE:

   209 		case SSL_ST_CONNECT:

   210 		case SSL_ST_BEFORE|SSL_ST_CONNECT:

   211 		case SSL_ST_OK|SSL_ST_CONNECT:

   212 

   213 			s->server=0;

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

   215 

   216 			if ((s->version & 0xff00 ) != 0x0300)

   217 				{

   218 				SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);

   219 				ret = -1;

   220 				goto end;

   221 				}

   222 				

   223 			/* s->version=SSL3_VERSION; */

   224 			s->type=SSL_ST_CONNECT;

   225 

   226 			if (s->init_buf == NULL)

   227 				{

   228 				if ((buf=BUF_MEM_new()) == NULL)

   229 					{

   230 					ret= -1;

   231 					goto end;

   232 					}

   233 				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))

   234 					{

   235 					ret= -1;

   236 					goto end;

   237 					}

   238 				s->init_buf=buf;

   239 				buf=NULL;

   240 				}

   241 

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

   243 

   244 			/* setup buffing BIO */

   245 			if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }

   246 

   247 			/* don't push the buffering BIO quite yet */

   248 

   249 			ssl3_init_finished_mac(s);

   250 

   251 			s->state=SSL3_ST_CW_CLNT_HELLO_A;

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

   253 			s->init_num=0;

   254 			break;

   255 

   256 		case SSL3_ST_CW_CLNT_HELLO_A:

   257 		case SSL3_ST_CW_CLNT_HELLO_B:

   258 

   259 			s->shutdown=0;

   260 			ret=ssl3_client_hello(s);

   261 			if (ret <= 0) goto end;

   262 			s->state=SSL3_ST_CR_SRVR_HELLO_A;

   263 			s->init_num=0;

   264 

   265 			/* turn on buffering for the next lot of output */

   266 			if (s->bbio != s->wbio)

   267 				s->wbio=BIO_push(s->bbio,s->wbio);

   268 

   269 			break;

   270 

   271 		case SSL3_ST_CR_SRVR_HELLO_A:

   272 		case SSL3_ST_CR_SRVR_HELLO_B:

   273 			ret=ssl3_get_server_hello(s);

   274 			if (ret <= 0) goto end;

   275 			if (s->hit)

   276 				s->state=SSL3_ST_CR_FINISHED_A;

   277 			else

   278 				s->state=SSL3_ST_CR_CERT_A;

   279 			s->init_num=0;

   280 			break;

   281 

   282 		case SSL3_ST_CR_CERT_A:

   283 		case SSL3_ST_CR_CERT_B:

   284 

   285 			/* Check if it is anon DH/ECDH */

   286 			if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))

   287 				{

   288 				ret=ssl3_get_server_certificate(s);

   289 				if (ret <= 0) goto end;

   290 				}

   291 			else

   292 				skip=1;

   293 			s->state=SSL3_ST_CR_KEY_EXCH_A;

   294 			s->init_num=0;

   295 			break;

   296 

   297 		case SSL3_ST_CR_KEY_EXCH_A:

   298 		case SSL3_ST_CR_KEY_EXCH_B:

   299 			ret=ssl3_get_key_exchange(s);

   300 			if (ret <= 0) goto end;

   301 			s->state=SSL3_ST_CR_CERT_REQ_A;

   302 			s->init_num=0;

   303 

   304 			/* at this point we check that we have the

   305 			 * required stuff from the server */

   306 			if (!ssl3_check_cert_and_algorithm(s))

   307 				{

   308 				ret= -1;

   309 				goto end;

   310 				}

   311 			break;

   312 

   313 		case SSL3_ST_CR_CERT_REQ_A:

   314 		case SSL3_ST_CR_CERT_REQ_B:

   315 			ret=ssl3_get_certificate_request(s);

   316 			if (ret <= 0) goto end;

   317 			s->state=SSL3_ST_CR_SRVR_DONE_A;

   318 			s->init_num=0;

   319 			break;

   320 

   321 		case SSL3_ST_CR_SRVR_DONE_A:

   322 		case SSL3_ST_CR_SRVR_DONE_B:

   323 			ret=ssl3_get_server_done(s);

   324 			if (ret <= 0) goto end;

   325 			if (s->s3->tmp.cert_req)

   326 				s->state=SSL3_ST_CW_CERT_A;

   327 			else

   328 				s->state=SSL3_ST_CW_KEY_EXCH_A;

   329 			s->init_num=0;

   330 

   331 			break;

   332 

   333 		case SSL3_ST_CW_CERT_A:

   334 		case SSL3_ST_CW_CERT_B:

   335 		case SSL3_ST_CW_CERT_C:

   336 		case SSL3_ST_CW_CERT_D:

   337 			ret=ssl3_send_client_certificate(s);

   338 			if (ret <= 0) goto end;

   339 			s->state=SSL3_ST_CW_KEY_EXCH_A;

   340 			s->init_num=0;

   341 			break;

   342 

   343 		case SSL3_ST_CW_KEY_EXCH_A:

   344 		case SSL3_ST_CW_KEY_EXCH_B:

   345 			ret=ssl3_send_client_key_exchange(s);

   346 			if (ret <= 0) goto end;

   347 			l=s->s3->tmp.new_cipher->algorithms;

   348 			/* EAY EAY EAY need to check for DH fix cert

   349 			 * sent back */

   350 			/* For TLS, cert_req is set to 2, so a cert chain

   351 			 * of nothing is sent, but no verify packet is sent */

   352 			/* XXX: For now, we do not support client 

   353 			 * authentication in ECDH cipher suites with

   354 			 * ECDH (rather than ECDSA) certificates.

   355 			 * We need to skip the certificate verify 

   356 			 * message when client's ECDH public key is sent 

   357 			 * inside the client certificate.

   358 			 */

   359 			if (s->s3->tmp.cert_req == 1)

   360 				{

   361 				s->state=SSL3_ST_CW_CERT_VRFY_A;

   362 				}

   363 			else

   364 				{

   365 				s->state=SSL3_ST_CW_CHANGE_A;

   366 				s->s3->change_cipher_spec=0;

   367 				}

   368 

   369 			s->init_num=0;

   370 			break;

   371 

   372 		case SSL3_ST_CW_CERT_VRFY_A:

   373 		case SSL3_ST_CW_CERT_VRFY_B:

   374 			ret=ssl3_send_client_verify(s);

   375 			if (ret <= 0) goto end;

   376 			s->state=SSL3_ST_CW_CHANGE_A;

   377 			s->init_num=0;

   378 			s->s3->change_cipher_spec=0;

   379 			break;

   380 

   381 		case SSL3_ST_CW_CHANGE_A:

   382 		case SSL3_ST_CW_CHANGE_B:

   383 			ret=ssl3_send_change_cipher_spec(s,

   384 				SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);

   385 			if (ret <= 0) goto end;

   386 			s->state=SSL3_ST_CW_FINISHED_A;

   387 			s->init_num=0;

   388 

   389 			s->session->cipher=s->s3->tmp.new_cipher;

   390 #ifdef OPENSSL_NO_COMP

   391 			s->session->compress_meth=0;

   392 #else

   393 			if (s->s3->tmp.new_compression == NULL)

   394 				s->session->compress_meth=0;

   395 			else

   396 				s->session->compress_meth=

   397 					s->s3->tmp.new_compression->id;

   398 #endif

   399 			if (!s->method->ssl3_enc->setup_key_block(s))

   400 				{

   401 				ret= -1;

   402 				goto end;

   403 				}

   404 

   405 			if (!s->method->ssl3_enc->change_cipher_state(s,

   406 				SSL3_CHANGE_CIPHER_CLIENT_WRITE))

   407 				{

   408 				ret= -1;

   409 				goto end;

   410 				}

   411 

   412 			break;

   413 

   414 		case SSL3_ST_CW_FINISHED_A:

   415 		case SSL3_ST_CW_FINISHED_B:

   416 			ret=ssl3_send_finished(s,

   417 				SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,

   418 				s->method->ssl3_enc->client_finished_label,

   419 				s->method->ssl3_enc->client_finished_label_len);

   420 			if (ret <= 0) goto end;

   421 			s->state=SSL3_ST_CW_FLUSH;

   422 

   423 			/* clear flags */

   424 			s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;

   425 			if (s->hit)

   426 				{

   427 				s->s3->tmp.next_state=SSL_ST_OK;

   428 				if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)

   429 					{

   430 					s->state=SSL_ST_OK;

   431 					s->s3->flags|=SSL3_FLAGS_POP_BUFFER;

   432 					s->s3->delay_buf_pop_ret=0;

   433 					}

   434 				}

   435 			else

   436 				{

   437 

   438 				

   439 				s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;

   440 				}

   441 			s->init_num=0;

   442 			break;

   443 

   444 

   445 

   446 		case SSL3_ST_CR_FINISHED_A:

   447 		case SSL3_ST_CR_FINISHED_B:

   448 

   449 			ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,

   450 				SSL3_ST_CR_FINISHED_B);

   451 			if (ret <= 0) goto end;

   452 

   453 			if (s->hit)

   454 				s->state=SSL3_ST_CW_CHANGE_A;

   455 			else

   456 				s->state=SSL_ST_OK;

   457 			s->init_num=0;

   458 			break;

   459 

   460 		case SSL3_ST_CW_FLUSH:

   461 			/* number of bytes to be flushed */

   462 			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);

   463 			if (num1 > 0)

   464 				{

   465 				s->rwstate=SSL_WRITING;

   466 				num1=BIO_flush(s->wbio);

   467 				if (num1 <= 0) { ret= -1; goto end; }

   468 				s->rwstate=SSL_NOTHING;

   469 				}

   470 

   471 			s->state=s->s3->tmp.next_state;

   472 			break;

   473 

   474 		case SSL_ST_OK:

   475 			/* clean a few things up */

   476 			ssl3_cleanup_key_block(s);

   477 

   478 			if (s->init_buf != NULL)

   479 				{

   480 				BUF_MEM_free(s->init_buf);

   481 				s->init_buf=NULL;

   482 				}

   483 

   484 			/* If we are not 'joining' the last two packets,

   485 			 * remove the buffering now */

   486 			if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))

   487 				ssl_free_wbio_buffer(s);

   488 			/* else do it later in ssl3_write */

   489 

   490 			s->init_num=0;

   491 			s->new_session=0;

   492 

   493 			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

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

   495 

   496 			ret=1;

   497 			/* s->server=0; */

   498 			s->handshake_func=ssl3_connect;

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

   500 

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

   502 

   503 			goto end;

   504 			/* break; */

   505 			

   506 		default:

   507 			SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);

   508 			ret= -1;

   509 			goto end;

   510 			/* break; */

   511 			}

   512 

   513 		/* did we do anything */

   514 		if (!s->s3->tmp.reuse_message && !skip)

   515 			{

   516 			if (s->debug)

   517 				{

   518 				if ((ret=BIO_flush(s->wbio)) <= 0)

   519 					goto end;

   520 				}

   521 

   522 			if ((cb != NULL) && (s->state != state))

   523 				{

   524 				new_state=s->state;

   525 				s->state=state;

   526 				cb(s,SSL_CB_CONNECT_LOOP,1);

   527 				s->state=new_state;

   528 				}

   529 			}

   530 		skip=0;

   531 		}

   532 end:

   533 	s->in_handshake--;

   534 	if (buf != NULL)

   535 		BUF_MEM_free(buf);

   536 	if (cb != NULL)

   537 		cb(s,SSL_CB_CONNECT_EXIT,ret);

   538 	return(ret);

   539 	}

   540 

   541 

   542 int ssl3_client_hello(SSL *s)

   543 	{

   544 	unsigned char *buf;

   545 	unsigned char *p,*d;

   546 	int i;

   547 	unsigned long Time,l;

   548 #ifndef OPENSSL_NO_COMP

   549 	int j;

   550 	SSL_COMP *comp;

   551 #endif

   552 

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

   554 	if (s->state == SSL3_ST_CW_CLNT_HELLO_A)

   555 		{

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

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

   558 			(s->session->not_resumable))

   559 			{

   560 			if (!ssl_get_new_session(s,0))

   561 				goto err;

   562 			}

   563 		/* else use the pre-loaded session */

   564 

   565 		p=s->s3->client_random;

   566 		Time=(unsigned long)time(NULL);			/* Time */

   567 		l2n(Time,p);

   568 		if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)

   569 			goto err;

   570 

   571 		/* Do the message type and length last */

   572 		d=p= &(buf[4]);

   573 

   574 		*(p++)=s->version>>8;

   575 		*(p++)=s->version&0xff;

   576 		s->client_version=s->version;

   577 

   578 		/* Random stuff */

   579 		memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);

   580 		p+=SSL3_RANDOM_SIZE;

   581 

   582 		/* Session ID */

   583 		if (s->new_session)

   584 			i=0;

   585 		else

   586 			i=s->session->session_id_length;

   587 		*(p++)=i;

   588 		if (i != 0)

   589 			{

   590 			if (i > (int)sizeof(s->session->session_id))

   591 				{

   592 				SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);

   593 				goto err;

   594 				}

   595 			memcpy(p,s->session->session_id,i);

   596 			p+=i;

   597 			}

   598 		

   599 		/* Ciphers supported */

   600 		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);

   601 		if (i == 0)

   602 			{

   603 			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);

   604 			goto err;

   605 			}

   606 		s2n(i,p);

   607 		p+=i;

   608 

   609 		/* COMPRESSION */

   610 #ifdef OPENSSL_NO_COMP

   611 		*(p++)=1;

   612 #else

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

   614 			j=0;

   615 		else

   616 			j=sk_SSL_COMP_num(s->ctx->comp_methods);

   617 		*(p++)=1+j;

   618 		for (i=0; i<j; i++)

   619 			{

   620 			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);

   621 			*(p++)=comp->id;

   622 			}

   623 #endif

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

   625 		

   626 		l=(p-d);

   627 		d=buf;

   628 		*(d++)=SSL3_MT_CLIENT_HELLO;

   629 		l2n3(l,d);

   630 

   631 		s->state=SSL3_ST_CW_CLNT_HELLO_B;

   632 		/* number of bytes to write */

   633 		s->init_num=p-buf;

   634 		s->init_off=0;

   635 		}

   636 

   637 	/* SSL3_ST_CW_CLNT_HELLO_B */

   638 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));

   639 err:

   640 	return(-1);

   641 	}

   642 

   643 int ssl3_get_server_hello(SSL *s)

   644 	{

   645 	STACK_OF(SSL_CIPHER) *sk;

   646 	SSL_CIPHER *c;

   647 	unsigned char *p,*d;

   648 	int i,al,ok;

   649 	unsigned int j;

   650 	long n;

   651 #ifndef OPENSSL_NO_COMP

   652 	SSL_COMP *comp;

   653 #endif

   654 

   655 	n=s->method->ssl_get_message(s,

   656 		SSL3_ST_CR_SRVR_HELLO_A,

   657 		SSL3_ST_CR_SRVR_HELLO_B,

   658 		-1,

   659 		20000, /* ?? */

   660 		&ok);

   661 

   662 	if (!ok) return((int)n);

   663 

   664 	if ( SSL_version(s) == DTLS1_VERSION)

   665 		{

   666 		if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)

   667 			{

   668 			if ( s->d1->send_cookie == 0)

   669 				{

   670 				s->s3->tmp.reuse_message = 1;

   671 				return 1;

   672 				}

   673 			else /* already sent a cookie */

   674 				{

   675 				al=SSL_AD_UNEXPECTED_MESSAGE;

   676 				SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);

   677 				goto f_err;

   678 				}

   679 			}

   680 		}

   681 	

   682 	if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)

   683 		{

   684 		al=SSL_AD_UNEXPECTED_MESSAGE;

   685 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);

   686 		goto f_err;

   687 		}

   688 

   689 	d=p=(unsigned char *)s->init_msg;

   690 

   691 	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))

   692 		{

   693 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);

   694 		s->version=(s->version&0xff00)|p[1];

   695 		al=SSL_AD_PROTOCOL_VERSION;

   696 		goto f_err;

   697 		}

   698 	p+=2;

   699 

   700 	/* load the server hello data */

   701 	/* load the server random */

   702 	memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);

   703 	p+=SSL3_RANDOM_SIZE;

   704 

   705 	/* get the session-id */

   706 	j= *(p++);

   707 

   708 	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))

   709 		{

   710 		al=SSL_AD_ILLEGAL_PARAMETER;

   711 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);

   712 		goto f_err;

   713 		}

   714 

   715 	if (j != 0 && j == s->session->session_id_length

   716 	    && memcmp(p,s->session->session_id,j) == 0)

   717 	    {

   718 	    if(s->sid_ctx_length != s->session->sid_ctx_length

   719 	       || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))

   720 		{

   721 		/* actually a client application bug */

   722 		al=SSL_AD_ILLEGAL_PARAMETER;

   723 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);

   724 		goto f_err;

   725 		}

   726 	    s->hit=1;

   727 	    }

   728 	else	/* a miss or crap from the other end */

   729 		{

   730 		/* If we were trying for session-id reuse, make a new

   731 		 * SSL_SESSION so we don't stuff up other people */

   732 		s->hit=0;

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

   734 			{

   735 			if (!ssl_get_new_session(s,0))

   736 				{

   737 				al=SSL_AD_INTERNAL_ERROR;

   738 				goto f_err;

   739 				}

   740 			}

   741 		s->session->session_id_length=j;

   742 		memcpy(s->session->session_id,p,j); /* j could be 0 */

   743 		}

   744 	p+=j;

   745 	c=ssl_get_cipher_by_char(s,p);

   746 	if (c == NULL)

   747 		{

   748 		/* unknown cipher */

   749 		al=SSL_AD_ILLEGAL_PARAMETER;

   750 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);

   751 		goto f_err;

   752 		}

   753 	p+=ssl_put_cipher_by_char(s,NULL,NULL);

   754 

   755 	sk=ssl_get_ciphers_by_id(s);

   756 	i=sk_SSL_CIPHER_find(sk,c);

   757 	if (i < 0)

   758 		{

   759 		/* we did not say we would use this cipher */

   760 		al=SSL_AD_ILLEGAL_PARAMETER;

   761 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);

   762 		goto f_err;

   763 		}

   764 

   765 	/* Depending on the session caching (internal/external), the cipher

   766 	   and/or cipher_id values may not be set. Make sure that

   767 	   cipher_id is set and use it for comparison. */

   768 	if (s->session->cipher)

   769 		s->session->cipher_id = s->session->cipher->id;

   770 	if (s->hit && (s->session->cipher_id != c->id))

   771 		{

   772 		if (!(s->options &

   773 			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))

   774 			{

   775 			al=SSL_AD_ILLEGAL_PARAMETER;

   776 			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);

   777 			goto f_err;

   778 			}

   779 		}

   780 	s->s3->tmp.new_cipher=c;

   781 

   782 	/* lets get the compression algorithm */

   783 	/* COMPRESSION */

   784 #ifdef OPENSSL_NO_COMP

   785 	if (*(p++) != 0)

   786 		{

   787 		al=SSL_AD_ILLEGAL_PARAMETER;

   788 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);

   789 		goto f_err;

   790 		}

   791 #else

   792 	j= *(p++);

   793 	if (j == 0)

   794 		comp=NULL;

   795 	else

   796 		comp=ssl3_comp_find(s->ctx->comp_methods,j);

   797 	

   798 	if ((j != 0) && (comp == NULL))

   799 		{

   800 		al=SSL_AD_ILLEGAL_PARAMETER;

   801 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);

   802 		goto f_err;

   803 		}

   804 	else

   805 		{

   806 		s->s3->tmp.new_compression=comp;

   807 		}

   808 #endif

   809 

   810 

   811 

   812 	if (p != (d+n))

   813 		{

   814 		/* wrong packet length */

   815 		al=SSL_AD_DECODE_ERROR;

   816 		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);

   817 		goto err;

   818 		}

   819 

   820 	return(1);

   821 f_err:

   822 	ssl3_send_alert(s,SSL3_AL_FATAL,al);

   823 err:

   824 	return(-1);

   825 	}

   826 

   827 int ssl3_get_server_certificate(SSL *s)

   828 	{

   829 	int al,i,ok,ret= -1;

   830 	unsigned long n,nc,llen,l;

   831 	X509 *x=NULL;

   832 	const unsigned char *q,*p;

   833 	unsigned char *d;

   834 	STACK_OF(X509) *sk=NULL;

   835 	SESS_CERT *sc;

   836 	EVP_PKEY *pkey=NULL;

   837 	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */

   838 

   839 	n=s->method->ssl_get_message(s,

   840 		SSL3_ST_CR_CERT_A,

   841 		SSL3_ST_CR_CERT_B,

   842 		-1,

   843 		s->max_cert_list,

   844 		&ok);

   845 

   846 	if (!ok) return((int)n);

   847 

   848 	if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||

   849 		((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 

   850 		(s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))

   851 		{

   852 		s->s3->tmp.reuse_message=1;

   853 		return(1);

   854 		}

   855 

   856 	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)

   857 		{

   858 		al=SSL_AD_UNEXPECTED_MESSAGE;

   859 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);

   860 		goto f_err;

   861 		}

   862 	p=d=(unsigned char *)s->init_msg;

   863 

   864 	if ((sk=sk_X509_new_null()) == NULL)

   865 		{

   866 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);

   867 		goto err;

   868 		}

   869 

   870 	n2l3(p,llen);

   871 	if (llen+3 != n)

   872 		{

   873 		al=SSL_AD_DECODE_ERROR;

   874 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);

   875 		goto f_err;

   876 		}

   877 	for (nc=0; nc<llen; )

   878 		{

   879 		n2l3(p,l);

   880 		if ((l+nc+3) > llen)

   881 			{

   882 			al=SSL_AD_DECODE_ERROR;

   883 			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);

   884 			goto f_err;

   885 			}

   886 

   887 		q=p;

   888 		x=d2i_X509(NULL,&q,l);

   889 		if (x == NULL)

   890 			{

   891 			al=SSL_AD_BAD_CERTIFICATE;

   892 			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);

   893 			goto f_err;

   894 			}

   895 		if (q != (p+l))

   896 			{

   897 			al=SSL_AD_DECODE_ERROR;

   898 			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);

   899 			goto f_err;

   900 			}

   901 		if (!sk_X509_push(sk,x))

   902 			{

   903 			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);

   904 			goto err;

   905 			}

   906 		x=NULL;

   907 		nc+=l+3;

   908 		p=q;

   909 		}

   910 

   911 	i=ssl_verify_cert_chain(s,sk);

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

   913 #ifndef OPENSSL_NO_KRB5

   914 	        && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))

   915 	        != (SSL_aKRB5|SSL_kKRB5)

   916 #endif /* OPENSSL_NO_KRB5 */

   917 	        )

   918 		{

   919 		al=ssl_verify_alarm_type(s->verify_result);

   920 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);

   921 		goto f_err; 

   922 		}

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

   924 

   925 	sc=ssl_sess_cert_new();

   926 	if (sc == NULL) goto err;

   927 

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

   929 	s->session->sess_cert=sc;

   930 

   931 	sc->cert_chain=sk;

   932 	/* Inconsistency alert: cert_chain does include the peer's

   933 	 * certificate, which we don't include in s3_srvr.c */

   934 	x=sk_X509_value(sk,0);

   935 	sk=NULL;

   936  	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/

   937 

   938 	pkey=X509_get_pubkey(x);

   939 

   940 	/* VRS: allow null cert if auth == KRB5 */

   941 	need_cert =	((s->s3->tmp.new_cipher->algorithms

   942 	                 & (SSL_MKEY_MASK|SSL_AUTH_MASK))

   943 	                 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;

   944 

   945 #ifdef KSSL_DEBUG

   946 	printf("pkey,x = %p, %p\n", pkey,x);

   947 	printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));

   948 	printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,

   949 	        s->s3->tmp.new_cipher->algorithms, need_cert);

   950 #endif    /* KSSL_DEBUG */

   951 

   952 	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))

   953 		{

   954 		x=NULL;

   955 		al=SSL3_AL_FATAL;

   956 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,

   957 			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);

   958 		goto f_err;

   959 		}

   960 

   961 	i=ssl_cert_type(x,pkey);

   962 	if (need_cert && i < 0)

   963 		{

   964 		x=NULL;

   965 		al=SSL3_AL_FATAL;

   966 		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,

   967 			SSL_R_UNKNOWN_CERTIFICATE_TYPE);

   968 		goto f_err;

   969 		}

   970 

   971 	if (need_cert)

   972 		{

   973 		sc->peer_cert_type=i;

   974 		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);

   975 		/* Why would the following ever happen?

   976 		 * We just created sc a couple of lines ago. */

   977 		if (sc->peer_pkeys[i].x509 != NULL)

   978 			X509_free(sc->peer_pkeys[i].x509);

   979 		sc->peer_pkeys[i].x509=x;

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

   981 

   982 		if (s->session->peer != NULL)

   983 			X509_free(s->session->peer);

   984 		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);

   985 		s->session->peer=x;

   986 		}

   987 	else

   988 		{

   989 		sc->peer_cert_type=i;

   990 		sc->peer_key= NULL;

   991 

   992 		if (s->session->peer != NULL)

   993 			X509_free(s->session->peer);

   994 		s->session->peer=NULL;

   995 		}

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

   997 

   998 	x=NULL;

   999 	ret=1;

  1000 

  1001 	if (0)

  1002 		{

  1003 f_err:

  1004 		ssl3_send_alert(s,SSL3_AL_FATAL,al);

  1005 		}

  1006 err:

  1007 	EVP_PKEY_free(pkey);

  1008 	X509_free(x);

  1009 	sk_X509_pop_free(sk,X509_free);

  1010 	return(ret);

  1011 	}

  1012 

  1013 int ssl3_get_key_exchange(SSL *s)

  1014 	{

  1015 #ifndef OPENSSL_NO_RSA

  1016 	unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];

  1017 #endif

  1018 	EVP_MD_CTX md_ctx;

  1019 	unsigned char *param,*p;

  1020 	int al,i,j,param_len,ok;

  1021 	long n,alg;

  1022 	EVP_PKEY *pkey=NULL;

  1023 #ifndef OPENSSL_NO_RSA

  1024 	RSA *rsa=NULL;

  1025 #endif

  1026 #ifndef OPENSSL_NO_DH

  1027 	DH *dh=NULL;

  1028 #endif

  1029 #ifndef OPENSSL_NO_ECDH

  1030 	EC_KEY *ecdh = NULL;

  1031 	BN_CTX *bn_ctx = NULL;

  1032 	EC_POINT *srvr_ecpoint = NULL;

  1033 	int curve_nid = 0;

  1034 	int encoded_pt_len = 0;

  1035 #endif

  1036 

  1037 	/* use same message size as in ssl3_get_certificate_request()

  1038 	 * as ServerKeyExchange message may be skipped */

  1039 	n=s->method->ssl_get_message(s,

  1040 		SSL3_ST_CR_KEY_EXCH_A,

  1041 		SSL3_ST_CR_KEY_EXCH_B,

  1042 		-1,

  1043 		s->max_cert_list,

  1044 		&ok);

  1045 

  1046 	if (!ok) return((int)n);

  1047 

  1048 	if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)

  1049 		{

  1050 		s->s3->tmp.reuse_message=1;

  1051 		return(1);

  1052 		}

  1053 

  1054 	param=p=(unsigned char *)s->init_msg;

  1055 

  1056 	if (s->session->sess_cert != NULL)

  1057 		{

  1058 #ifndef OPENSSL_NO_RSA

  1059 		if (s->session->sess_cert->peer_rsa_tmp != NULL)

  1060 			{

  1061 			RSA_free(s->session->sess_cert->peer_rsa_tmp);

  1062 			s->session->sess_cert->peer_rsa_tmp=NULL;

  1063 			}

  1064 #endif

  1065 #ifndef OPENSSL_NO_DH

  1066 		if (s->session->sess_cert->peer_dh_tmp)

  1067 			{

  1068 			DH_free(s->session->sess_cert->peer_dh_tmp);

  1069 			s->session->sess_cert->peer_dh_tmp=NULL;

  1070 			}

  1071 #endif

  1072 #ifndef OPENSSL_NO_ECDH

  1073 		if (s->session->sess_cert->peer_ecdh_tmp)

  1074 			{

  1075 			EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);

  1076 			s->session->sess_cert->peer_ecdh_tmp=NULL;

  1077 			}

  1078 #endif

  1079 		}

  1080 	else

  1081 		{

  1082 		s->session->sess_cert=ssl_sess_cert_new();

  1083 		}

  1084 

  1085 	param_len=0;

  1086 	alg=s->s3->tmp.new_cipher->algorithms;

  1087 	EVP_MD_CTX_init(&md_ctx);

  1088 

  1089 #ifndef OPENSSL_NO_RSA

  1090 	if (alg & SSL_kRSA)

  1091 		{

  1092 		if ((rsa=RSA_new()) == NULL)

  1093 			{

  1094 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  1095 			goto err;

  1096 			}

  1097 		n2s(p,i);

  1098 		param_len=i+2;

  1099 		if (param_len > n)

  1100 			{

  1101 			al=SSL_AD_DECODE_ERROR;

  1102 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);

  1103 			goto f_err;

  1104 			}

  1105 		if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))

  1106 			{

  1107 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);

  1108 			goto err;

  1109 			}

  1110 		p+=i;

  1111 

  1112 		n2s(p,i);

  1113 		param_len+=i+2;

  1114 		if (param_len > n)

  1115 			{

  1116 			al=SSL_AD_DECODE_ERROR;

  1117 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);

  1118 			goto f_err;

  1119 			}

  1120 		if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))

  1121 			{

  1122 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);

  1123 			goto err;

  1124 			}

  1125 		p+=i;

  1126 		n-=param_len;

  1127 

  1128 		/* this should be because we are using an export cipher */

  1129 		if (alg & SSL_aRSA)

  1130 			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);

  1131 		else

  1132 			{

  1133 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

  1134 			goto err;

  1135 			}