Symaptic: os/ossrv/ssl/libssl/src/s3

     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  */

   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>

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

   143 #include "libssl_wsd.h"

   144 #endif

   147 #ifdef EMULATOR

   149 	GET_STATIC_VAR_FROM_TLS(SSLv3_client_method_data,s3_clnt,SSL_METHOD)

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

   153 #endif

   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);

   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

   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 	}

   171 EXPORT_C IMPLEMENT_ssl3_meth_func(SSLv3_client_method,

   172 			ssl_undefined_function,

   173 			ssl3_connect,

   174 			ssl3_get_client_method)

   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;;

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

   186 	ERR_clear_error();

   187 	clear_sys_error();

   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;

   194 	s->in_handshake++;

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

   197 	for (;;)

   198 		{

   199 		state=s->state;

   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:

   213 			s->server=0;

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

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

   217 				{

   218 				SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);

   219 				ret = -1;

   220 				goto end;

   221 				}

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

   224 			s->type=SSL_ST_CONNECT;

   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 				}

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

   244 			/* setup buffing BIO */

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

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

   249 			ssl3_init_finished_mac(s);

   251 			s->state=SSL3_ST_CW_CLNT_HELLO_A;

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

   253 			s->init_num=0;

   254 			break;

   256 		case SSL3_ST_CW_CLNT_HELLO_A:

   257 		case SSL3_ST_CW_CLNT_HELLO_B:

   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;

   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);

   269 			break;

   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;

   282 		case SSL3_ST_CR_CERT_A:

   283 		case SSL3_ST_CR_CERT_B:

   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;

   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;

   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;

   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;

   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;

   331 			break;

   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;

   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 				}

   369 			s->init_num=0;

   370 			break;

   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;

   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;

   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 				}

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

   406 				SSL3_CHANGE_CIPHER_CLIENT_WRITE))

   407 				{

   408 				ret= -1;

   409 				goto end;

   410 				}

   412 			break;

   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;

   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 				{

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

   440 				}

   441 			s->init_num=0;

   442 			break;

   446 		case SSL3_ST_CR_FINISHED_A:

   447 		case SSL3_ST_CR_FINISHED_B:

   449 			ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,

   450 				SSL3_ST_CR_FINISHED_B);

   451 			if (ret <= 0) goto end;

   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;

   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 				}

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

   472 			break;

   474 		case SSL_ST_OK:

   475 			/* clean a few things up */

   476 			ssl3_cleanup_key_block(s);

   478 			if (s->init_buf != NULL)

   479 				{

   480 				BUF_MEM_free(s->init_buf);

   481 				s->init_buf=NULL;

   482 				}

   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 */

   490 			s->init_num=0;

   491 			s->new_session=0;

   493 			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

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

   496 			ret=1;

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

   498 			s->handshake_func=ssl3_connect;

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

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

   503 			goto end;

   504 			/* break; */

   506 		default:

   507 			SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);

   508 			ret= -1;

   509 			goto end;

   510 			/* break; */

   511 			}

   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 				}

   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 	}

   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

   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 */

   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;

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

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

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

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

   576 		s->client_version=s->version;

   578 		/* Random stuff */

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

   580 		p+=SSL3_RANDOM_SIZE;

   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 			}

   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;

   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 */

   626 		l=(p-d);

   627 		d=buf;

   628 		*(d++)=SSL3_MT_CLIENT_HELLO;

   629 		l2n3(l,d);

   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 		}

   637 	/* SSL3_ST_CW_CLNT_HELLO_B */

   638 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));

   639 err:

   640 	return(-1);

   641 	}

   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

   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);

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

   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 		}

   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 		}

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

   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;

   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;

   705 	/* get the session-id */

   706 	j= *(p++);

   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 		}

   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);

   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 		}

   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;

   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);

   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

   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 		}

   820 	return(1);

   821 f_err:

   822 	ssl3_send_alert(s,SSL3_AL_FATAL,al);

   823 err:

   824 	return(-1);

   825 	}

   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 */

   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);

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

   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 		}

   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;

   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 		}

   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 			}

   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 		}

   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 */

   925 	sc=ssl_sess_cert_new();

   926 	if (sc == NULL) goto err;

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

   929 	s->session->sess_cert=sc;

   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*/

   938 	pkey=X509_get_pubkey(x);

   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;

   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 */

   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 		}

   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 		}

   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]);

   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;

   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;

   998 	x=NULL;

   999 	ret=1;

  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 	}

  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

  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);

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

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

  1049 		{

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

  1051 		return(1);

  1052 		}

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

  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 		}

  1085 	param_len=0;

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

  1087 	EVP_MD_CTX_init(&md_ctx);

  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;

  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;

  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 			}

  1136 		s->session->sess_cert->peer_rsa_tmp=rsa;

  1137 		rsa=NULL;

  1138 		}

  1139 #else /* OPENSSL_NO_RSA */

  1140 	if (0)

  1141 		;

  1142 #endif

  1143 #ifndef OPENSSL_NO_DH

  1144 	else if (alg & SSL_kEDH)

  1145 		{

  1146 		if ((dh=DH_new()) == NULL)

  1147 			{

  1148 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);

  1149 			goto err;

  1150 			}

  1151 		n2s(p,i);

  1152 		param_len=i+2;

  1153 		if (param_len > n)

  1154 			{

  1155 			al=SSL_AD_DECODE_ERROR;

  1156 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);

  1157 			goto f_err;

  1158 			}

  1159 		if (!(dh->p=BN_bin2bn(p,i,NULL)))

  1160 			{

  1161 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);

  1162 			goto err;

  1163 			}

  1164 		p+=i;

  1166 		n2s(p,i);

  1167 		param_len+=i+2;

  1168 		if (param_len > n)

  1169 			{

  1170 			al=SSL_AD_DECODE_ERROR;

  1171 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);

  1172 			goto f_err;

  1173 			}

  1174 		if (!(dh->g=BN_bin2bn(p,i,NULL)))

  1175 			{

  1176 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);

  1177 			goto err;

  1178 			}

  1179 		p+=i;

  1181 		n2s(p,i);

  1182 		param_len+=i+2;

  1183 		if (param_len > n)

  1184 			{

  1185 			al=SSL_AD_DECODE_ERROR;

  1186 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);

  1187 			goto f_err;

  1188 			}

  1189 		if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))

  1190 			{

  1191 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);

  1192 			goto err;

  1193 			}

  1194 		p+=i;

  1195 		n-=param_len;

  1197 #ifndef OPENSSL_NO_RSA

  1198 		if (alg & SSL_aRSA)

  1199 			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);

  1200 #else

  1201 		if (0)

  1202 			;

  1203 #endif

  1204 #ifndef OPENSSL_NO_DSA

  1205 		else if (alg & SSL_aDSS)

  1206 			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);

  1207 #endif

  1208 		/* else anonymous DH, so no certificate or pkey. */

  1210 		s->session->sess_cert->peer_dh_tmp=dh;

  1211 		dh=NULL;

  1212 		}

  1213 	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))

  1214 		{

  1215 		al=SSL_AD_ILLEGAL_PARAMETER;

  1216 		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);

  1217 		goto f_err;

  1218 		}

  1219 #endif /* !OPENSSL_NO_DH */

  1221 #ifndef OPENSSL_NO_ECDH

  1222 	else if (alg & SSL_kECDHE)

  1223 		{

  1224 		EC_GROUP *ngroup;

  1225 		const EC_GROUP *group;

  1227 		if ((ecdh=EC_KEY_new()) == NULL)

  1228 			{

  1229 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  1230 			goto err;

  1231 			}

  1233 		/* Extract elliptic curve parameters and the

  1234 		 * server's ephemeral ECDH public key.

  1235 		 * Keep accumulating lengths of various components in

  1236 		 * param_len and make sure it never exceeds n.

  1237 		 */

  1239 		/* XXX: For now we only support named (not generic) curves

  1240 		 * and the ECParameters in this case is just three bytes.

  1241 		 */

  1242 		param_len=3;

  1243 		if ((param_len > n) ||

  1244 		    (*p != NAMED_CURVE_TYPE) ||

  1245 		    ((curve_nid = curve_id2nid(*(p + 2))) == 0))

  1246 			{

  1247 			al=SSL_AD_INTERNAL_ERROR;

  1248 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);

  1249 			goto f_err;

  1250 			}

  1252 		ngroup = EC_GROUP_new_by_curve_name(curve_nid);

  1253 		if (ngroup == NULL)

  1254 			{

  1255 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);

  1256 			goto err;

  1257 			}

  1258 		if (EC_KEY_set_group(ecdh, ngroup) == 0)

  1259 			{

  1260 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);

  1261 			goto err;

  1262 			}

  1263 		EC_GROUP_free(ngroup);

  1265 		group = EC_KEY_get0_group(ecdh);

  1267 		if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&

  1268 		    (EC_GROUP_get_degree(group) > 163))

  1269 			{

  1270 			al=SSL_AD_EXPORT_RESTRICTION;

  1271 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);

  1272 			goto f_err;

  1273 			}

  1275 		p+=3;

  1277 		/* Next, get the encoded ECPoint */

  1278 		if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||

  1279 		    ((bn_ctx = BN_CTX_new()) == NULL))

  1280 			{

  1281 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  1282 			goto err;

  1283 			}

  1285 		encoded_pt_len = *p;  /* length of encoded point */

  1286 		p+=1;

  1287 		param_len += (1 + encoded_pt_len);

  1288 		if ((param_len > n) ||

  1289 		    (EC_POINT_oct2point(group, srvr_ecpoint,

  1290 			p, encoded_pt_len, bn_ctx) == 0))

  1291 			{

  1292 			al=SSL_AD_DECODE_ERROR;

  1293 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);

  1294 			goto f_err;

  1295 			}

  1297 		n-=param_len;

  1298 		p+=encoded_pt_len;

  1300 		/* The ECC/TLS specification does not mention

  1301 		 * the use of DSA to sign ECParameters in the server

  1302 		 * key exchange message. We do support RSA and ECDSA.

  1303 		 */

  1304 		if (0) ;

  1305 #ifndef OPENSSL_NO_RSA

  1306 		else if (alg & SSL_aRSA)

  1307 			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);

  1308 #endif

  1309 #ifndef OPENSSL_NO_ECDSA

  1310 		else if (alg & SSL_aECDSA)

  1311 			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);

  1312 #endif

  1313 		/* else anonymous ECDH, so no certificate or pkey. */

  1314 		EC_KEY_set_public_key(ecdh, srvr_ecpoint);

  1315 		s->session->sess_cert->peer_ecdh_tmp=ecdh;

  1316 		ecdh=NULL;

  1317 		BN_CTX_free(bn_ctx);

  1318 		EC_POINT_free(srvr_ecpoint);

  1319 		srvr_ecpoint = NULL;

  1320 		}

  1321 	else if (alg & SSL_kECDH)

  1322 		{

  1323 		al=SSL_AD_UNEXPECTED_MESSAGE;

  1324 		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);

  1325 		goto f_err;

  1326 		}

  1327 #endif /* !OPENSSL_NO_ECDH */

  1328 	if (alg & SSL_aFZA)

  1329 		{

  1330 		al=SSL_AD_HANDSHAKE_FAILURE;

  1331 		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);

  1332 		goto f_err;

  1333 		}

  1336 	/* p points to the next byte, there are 'n' bytes left */

  1338 	/* if it was signed, check the signature */

  1339 	if (pkey != NULL)

  1340 		{

  1341 		n2s(p,i);

  1342 		n-=2;

  1343 		j=EVP_PKEY_size(pkey);

  1345 		if ((i != n) || (n > j) || (n <= 0))

  1346 			{

  1347 			/* wrong packet length */

  1348 			al=SSL_AD_DECODE_ERROR;

  1349 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);

  1350 			goto f_err;

  1351 			}

  1353 #ifndef OPENSSL_NO_RSA

  1354 		if (pkey->type == EVP_PKEY_RSA)

  1355 			{

  1356 			int num;

  1358 			j=0;

  1359 			q=md_buf;

  1360 			for (num=2; num > 0; num--)

  1361 				{

  1362 				EVP_DigestInit_ex(&md_ctx,(num == 2)

  1363 					?s->ctx->md5:s->ctx->sha1, NULL);

  1364 				EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);

  1365 				EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);

  1366 				EVP_DigestUpdate(&md_ctx,param,param_len);

  1367 				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);

  1368 				q+=i;

  1369 				j+=i;

  1370 				}

  1371 			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,

  1372 								pkey->pkey.rsa);

  1373 			if (i < 0)

  1374 				{

  1375 				al=SSL_AD_DECRYPT_ERROR;

  1376 				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);

  1377 				goto f_err;

  1378 				}

  1379 			if (i == 0)

  1380 				{

  1381 				/* bad signature */

  1382 				al=SSL_AD_DECRYPT_ERROR;

  1383 				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);

  1384 				goto f_err;

  1385 				}

  1386 			}

  1387 		else

  1388 #endif

  1389 #ifndef OPENSSL_NO_DSA

  1390 			if (pkey->type == EVP_PKEY_DSA)

  1391 			{

  1392 			/* lets do DSS */

  1393 			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);

  1394 			EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);

  1395 			EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);

  1396 			EVP_VerifyUpdate(&md_ctx,param,param_len);

  1397 			if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))

  1398 				{

  1399 				/* bad signature */

  1400 				al=SSL_AD_DECRYPT_ERROR;

  1401 				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);

  1402 				goto f_err;

  1403 				}

  1404 			}

  1405 		else

  1406 #endif

  1407 #ifndef OPENSSL_NO_ECDSA

  1408 			if (pkey->type == EVP_PKEY_EC)

  1409 			{

  1410 			/* let's do ECDSA */

  1411 			EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);

  1412 			EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);

  1413 			EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);

  1414 			EVP_VerifyUpdate(&md_ctx,param,param_len);

  1415 			if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))

  1416 				{

  1417 				/* bad signature */

  1418 				al=SSL_AD_DECRYPT_ERROR;

  1419 				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);

  1420 				goto f_err;

  1421 				}

  1422 			}

  1423 		else

  1424 #endif

  1425 			{

  1426 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

  1427 			goto err;

  1428 			}

  1429 		}

  1430 	else

  1431 		{

  1432 		/* still data left over */

  1433 		if (!(alg & SSL_aNULL))

  1434 			{

  1435 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

  1436 			goto err;

  1437 			}

  1438 		if (n != 0)

  1439 			{

  1440 			al=SSL_AD_DECODE_ERROR;

  1441 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);

  1442 			goto f_err;

  1443 			}

  1444 		}

  1445 	EVP_PKEY_free(pkey);

  1446 	EVP_MD_CTX_cleanup(&md_ctx);

  1447 	return(1);

  1448 f_err:

  1449 	ssl3_send_alert(s,SSL3_AL_FATAL,al);

  1450 err:

  1451 	EVP_PKEY_free(pkey);

  1452 #ifndef OPENSSL_NO_RSA

  1453 	if (rsa != NULL)

  1454 		RSA_free(rsa);

  1455 #endif

  1456 #ifndef OPENSSL_NO_DH

  1457 	if (dh != NULL)

  1458 		DH_free(dh);

  1459 #endif

  1460 #ifndef OPENSSL_NO_ECDH

  1461 	BN_CTX_free(bn_ctx);

  1462 	EC_POINT_free(srvr_ecpoint);

  1463 	if (ecdh != NULL)

  1464 		EC_KEY_free(ecdh);

  1465 #endif

  1466 	EVP_MD_CTX_cleanup(&md_ctx);

  1467 	return(-1);

  1468 	}

  1470 int ssl3_get_certificate_request(SSL *s)

  1471 	{

  1472 	int ok,ret=0;

  1473 	unsigned long n,nc,l;

  1474 	unsigned int llen,ctype_num,i;

  1475 	X509_NAME *xn=NULL;

  1476 	const unsigned char *p,*q;

  1477 	unsigned char *d;

  1478 	STACK_OF(X509_NAME) *ca_sk=NULL;

  1480 	n=s->method->ssl_get_message(s,

  1481 		SSL3_ST_CR_CERT_REQ_A,

  1482 		SSL3_ST_CR_CERT_REQ_B,

  1483 		-1,

  1484 		s->max_cert_list,

  1485 		&ok);

  1487 	if (!ok) return((int)n);

  1489 	s->s3->tmp.cert_req=0;

  1491 	if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)

  1492 		{

  1493 		s->s3->tmp.reuse_message=1;

  1494 		return(1);

  1495 		}

  1497 	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)

  1498 		{

  1499 		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);

  1500 		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);

  1501 		goto err;

  1502 		}

  1504 	/* TLS does not like anon-DH with client cert */

  1505 	if (s->version > SSL3_VERSION)

  1506 		{

  1507 		l=s->s3->tmp.new_cipher->algorithms;

  1508 		if (l & SSL_aNULL)

  1509 			{

  1510 			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);

  1511 			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);

  1512 			goto err;

  1513 			}

  1514 		}

  1516 	p=d=(unsigned char *)s->init_msg;

  1518 	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)

  1519 		{

  1520 		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);

  1521 		goto err;

  1522 		}

  1524 	/* get the certificate types */

  1525 	ctype_num= *(p++);

  1526 	if (ctype_num > SSL3_CT_NUMBER)

  1527 		ctype_num=SSL3_CT_NUMBER;

  1528 	for (i=0; i<ctype_num; i++)

  1529 		s->s3->tmp.ctype[i]= p[i];

  1530 	p+=ctype_num;

  1532 	/* get the CA RDNs */

  1533 	n2s(p,llen);

  1534 #if 0

  1535 {

  1536 FILE *out;

  1537 out=fopen("/tmp/vsign.der","w");

  1538 fwrite(p,1,llen,out);

  1539 fclose(out);

  1540 }

  1541 #endif

  1543 	if ((llen+ctype_num+2+1) != n)

  1544 		{

  1545 		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);

  1546 		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);

  1547 		goto err;

  1548 		}

  1550 	for (nc=0; nc<llen; )

  1551 		{

  1552 		n2s(p,l);

  1553 		if ((l+nc+2) > llen)

  1554 			{

  1555 			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))

  1556 				goto cont; /* netscape bugs */

  1557 			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);

  1558 			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);

  1559 			goto err;

  1560 			}

  1562 		q=p;

  1564 		if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)

  1565 			{

  1566 			/* If netscape tolerance is on, ignore errors */

  1567 			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)

  1568 				goto cont;

  1569 			else

  1570 				{

  1571 				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);

  1572 				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);

  1573 				goto err;

  1574 				}

  1575 			}

  1577 		if (q != (p+l))

  1578 			{

  1579 			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);

  1580 			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);

  1581 			goto err;

  1582 			}

  1583 		if (!sk_X509_NAME_push(ca_sk,xn))

  1584 			{

  1585 			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);

  1586 			goto err;

  1587 			}

  1589 		p+=l;

  1590 		nc+=l+2;

  1591 		}

  1593 	if (0)

  1594 		{

  1595 cont:

  1596 		ERR_clear_error();

  1597 		}

  1599 	/* we should setup a certificate to return.... */

  1600 	s->s3->tmp.cert_req=1;

  1601 	s->s3->tmp.ctype_num=ctype_num;

  1602 	if (s->s3->tmp.ca_names != NULL)

  1603 		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);

  1604 	s->s3->tmp.ca_names=ca_sk;

  1605 	ca_sk=NULL;

  1607 	ret=1;

  1608 err:

  1609 	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);

  1610 	return(ret);

  1611 	}

  1613 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)

  1614 	{

  1615 	return(X509_NAME_cmp(*a,*b));

  1616 	}

  1618 int ssl3_get_server_done(SSL *s)

  1619 	{

  1620 	int ok,ret=0;

  1621 	long n;

  1623 	n=s->method->ssl_get_message(s,

  1624 		SSL3_ST_CR_SRVR_DONE_A,

  1625 		SSL3_ST_CR_SRVR_DONE_B,

  1626 		SSL3_MT_SERVER_DONE,

  1627 		30, /* should be very small, like 0 :-) */

  1628 		&ok);

  1630 	if (!ok) return((int)n);

  1631 	if (n > 0)

  1632 		{

  1633 		/* should contain no data */

  1634 		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);

  1635 		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);

  1636 		return -1;

  1637 		}

  1638 	ret=1;

  1639 	return(ret);

  1640 	}

  1643 int ssl3_send_client_key_exchange(SSL *s)

  1644 	{

  1645 	unsigned char *p,*d;

  1646 	int n;

  1647 	unsigned long l;

  1648 #ifndef OPENSSL_NO_RSA

  1649 	unsigned char *q;

  1650 	EVP_PKEY *pkey=NULL;

  1651 #endif

  1652 #ifndef OPENSSL_NO_KRB5

  1653 	KSSL_ERR kssl_err;

  1654 #endif /* OPENSSL_NO_KRB5 */

  1655 #ifndef OPENSSL_NO_ECDH

  1656 	EC_KEY *clnt_ecdh = NULL;

  1657 	const EC_POINT *srvr_ecpoint = NULL;

  1658 	EVP_PKEY *srvr_pub_pkey = NULL;

  1659 	unsigned char *encodedPoint = NULL;

  1660 	int encoded_pt_len = 0;

  1661 	BN_CTX * bn_ctx = NULL;

  1662 #endif

  1664 	if (s->state == SSL3_ST_CW_KEY_EXCH_A)

  1665 		{

  1666 		d=(unsigned char *)s->init_buf->data;

  1667 		p= &(d[4]);

  1669 		l=s->s3->tmp.new_cipher->algorithms;

  1671 		/* Fool emacs indentation */

  1672 		if (0) {}

  1673 #ifndef OPENSSL_NO_RSA

  1674 		else if (l & SSL_kRSA)

  1675 			{

  1676 			RSA *rsa;

  1677 			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];

  1679 			if (s->session->sess_cert->peer_rsa_tmp != NULL)

  1680 				rsa=s->session->sess_cert->peer_rsa_tmp;

  1681 			else

  1682 				{

  1683 				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);

  1684 				if ((pkey == NULL) ||

  1685 					(pkey->type != EVP_PKEY_RSA) ||

  1686 					(pkey->pkey.rsa == NULL))

  1687 					{

  1688 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);

  1689 					goto err;

  1690 					}

  1691 				rsa=pkey->pkey.rsa;

  1692 				EVP_PKEY_free(pkey);

  1693 				}

  1695 			tmp_buf[0]=s->client_version>>8;

  1696 			tmp_buf[1]=s->client_version&0xff;

  1697 			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)

  1698 					goto err;

  1700 			s->session->master_key_length=sizeof tmp_buf;

  1702 			q=p;

  1703 			/* Fix buf for TLS and beyond */

  1704 			if (s->version > SSL3_VERSION)

  1705 				p+=2;

  1706 			n=RSA_public_encrypt(sizeof tmp_buf,

  1707 				tmp_buf,p,rsa,RSA_PKCS1_PADDING);

  1708 #ifdef PKCS1_CHECK

  1709 			if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;

  1710 			if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;

  1711 #endif

  1712 			if (n <= 0)

  1713 				{

  1714 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);

  1715 				goto err;

  1716 				}

  1718 			/* Fix buf for TLS and beyond */

  1719 			if (s->version > SSL3_VERSION)

  1720 				{

  1721 				s2n(n,q);

  1722 				n+=2;

  1723 				}

  1725 			s->session->master_key_length=

  1726 				s->method->ssl3_enc->generate_master_secret(s,

  1727 					s->session->master_key,

  1728 					tmp_buf,sizeof tmp_buf);

  1729 			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);

  1730 			}

  1731 #endif

  1732 #ifndef OPENSSL_NO_KRB5

  1733 		else if (l & SSL_kKRB5)

  1734 			{

  1735 			krb5_error_code	krb5rc;

  1736 			KSSL_CTX	*kssl_ctx = s->kssl_ctx;

  1737 			/*  krb5_data	krb5_ap_req;  */

  1738 			krb5_data	*enc_ticket;

  1739 			krb5_data	authenticator, *authp = NULL;

  1740 			EVP_CIPHER_CTX	ciph_ctx;

  1741 			EVP_CIPHER	*enc = NULL;

  1742 			unsigned char	iv[EVP_MAX_IV_LENGTH];

  1743 			unsigned char	tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];

  1744 			unsigned char	epms[SSL_MAX_MASTER_KEY_LENGTH

  1745 						+ EVP_MAX_IV_LENGTH];

  1746 			int 		padl, outl = sizeof(epms);

  1748 			EVP_CIPHER_CTX_init(&ciph_ctx);

  1750 #ifdef KSSL_DEBUG

  1751 			printf("ssl3_send_client_key_exchange(%lx & %lx)\n",

  1752 			        l, SSL_kKRB5);

  1753 #endif	/* KSSL_DEBUG */

  1755 			authp = NULL;

  1756 #ifdef KRB5SENDAUTH

  1757 			if (KRB5SENDAUTH)  authp = &authenticator;

  1758 #endif	/* KRB5SENDAUTH */

  1760 			krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,

  1761 				&kssl_err);

  1762 			enc = kssl_map_enc(kssl_ctx->enctype);

  1763 			if (enc == NULL)

  1764 			    goto err;

  1765 #ifdef KSSL_DEBUG

  1766 			{

  1767 			printf("kssl_cget_tkt rtn %d\n", krb5rc);

  1768 			if (krb5rc && kssl_err.text)

  1769 			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);

  1770 			}

  1771 #endif	/* KSSL_DEBUG */

  1773 			if (krb5rc)

  1774 				{

  1775 				ssl3_send_alert(s,SSL3_AL_FATAL,

  1776 						SSL_AD_HANDSHAKE_FAILURE);

  1777 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  1778 						kssl_err.reason);

  1779 				goto err;

  1780 				}

  1782 			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ

  1783 			**  in place of RFC 2712 KerberosWrapper, as in:

  1784 			**

  1785 			**  Send ticket (copy to *p, set n = length)

  1786 			**  n = krb5_ap_req.length;

  1787 			**  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);

  1788 			**  if (krb5_ap_req.data)

  1789 			**    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);

  1790 			**

  1791 			**  Now using real RFC 2712 KerberosWrapper

  1792 			**  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)

  1793 			**  Note: 2712 "opaque" types are here replaced

  1794 			**  with a 2-byte length followed by the value.

  1795 			**  Example:

  1796 			**  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms

  1797 			**  Where "xx xx" = length bytes.  Shown here with

  1798 			**  optional authenticator omitted.

  1799 			*/

  1801 			/*  KerberosWrapper.Ticket		*/

  1802 			s2n(enc_ticket->length,p);

  1803 			memcpy(p, enc_ticket->data, enc_ticket->length);

  1804 			p+= enc_ticket->length;

  1805 			n = enc_ticket->length + 2;

  1807 			/*  KerberosWrapper.Authenticator	*/

  1808 			if (authp  &&  authp->length)

  1809 				{

  1810 				s2n(authp->length,p);

  1811 				memcpy(p, authp->data, authp->length);

  1812 				p+= authp->length;

  1813 				n+= authp->length + 2;

  1815 				free(authp->data);

  1816 				authp->data = NULL;

  1817 				authp->length = 0;

  1818 				}

  1819 			else

  1820 				{

  1821 				s2n(0,p);/*  null authenticator length	*/

  1822 				n+=2;

  1823 				}

  1825 			    tmp_buf[0]=s->client_version>>8;

  1826 			    tmp_buf[1]=s->client_version&0xff;

  1827 			    if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)

  1828 				goto err;

  1830 			/*  20010420 VRS.  Tried it this way; failed.

  1831 			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);

  1832 			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,

  1833 			**				kssl_ctx->length);

  1834 			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);

  1835 			*/

  1837 			memset(iv, 0, sizeof iv);  /* per RFC 1510 */

  1838 			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,

  1839 				kssl_ctx->key,iv);

  1840 			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,

  1841 				sizeof tmp_buf);

  1842 			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);

  1843 			outl += padl;

  1844 			if (outl > sizeof epms)

  1845 				{

  1846 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);

  1847 				goto err;

  1848 				}

  1849 			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

  1851 			/*  KerberosWrapper.EncryptedPreMasterSecret	*/

  1852 			s2n(outl,p);

  1853 			memcpy(p, epms, outl);

  1854 			p+=outl;

  1855 			n+=outl + 2;

  1857 			s->session->master_key_length=

  1858 			        s->method->ssl3_enc->generate_master_secret(s,

  1859 					s->session->master_key,

  1860 					tmp_buf, sizeof tmp_buf);

  1862 			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);

  1863 			OPENSSL_cleanse(epms, outl);

  1864 			}

  1865 #endif

  1866 #ifndef OPENSSL_NO_DH

  1867 		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))

  1868 			{

  1869 			DH *dh_srvr,*dh_clnt;

  1871 			if (s->session->sess_cert->peer_dh_tmp != NULL)

  1872 				dh_srvr=s->session->sess_cert->peer_dh_tmp;

  1873 			else

  1874 				{

  1875 				/* we get them from the cert */

  1876 				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);

  1877 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);

  1878 				goto err;

  1879 				}

  1881 			/* generate a new random key */

  1882 			if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)

  1883 				{

  1884 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

  1885 				goto err;

  1886 				}

  1887 			if (!DH_generate_key(dh_clnt))

  1888 				{

  1889 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

  1890 				goto err;

  1891 				}

  1893 			/* use the 'p' output buffer for the DH key, but

  1894 			 * make sure to clear it out afterwards */

  1896 			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);

  1898 			if (n <= 0)

  1899 				{

  1900 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);

  1901 				goto err;

  1902 				}

  1904 			/* generate master key from the result */

  1905 			s->session->master_key_length=

  1906 				s->method->ssl3_enc->generate_master_secret(s,

  1907 					s->session->master_key,p,n);

  1908 			/* clean up */

  1909 			memset(p,0,n);

  1911 			/* send off the data */

  1912 			n=BN_num_bytes(dh_clnt->pub_key);

  1913 			s2n(n,p);

  1914 			BN_bn2bin(dh_clnt->pub_key,p);

  1915 			n+=2;

  1917 			DH_free(dh_clnt);

  1919 			/* perhaps clean things up a bit EAY EAY EAY EAY*/

  1920 			}

  1921 #endif

  1923 #ifndef OPENSSL_NO_ECDH

  1924 		else if ((l & SSL_kECDH) || (l & SSL_kECDHE))

  1925 			{

  1926 			const EC_GROUP *srvr_group = NULL;

  1927 			EC_KEY *tkey;

  1928 			int ecdh_clnt_cert = 0;

  1929 			int field_size = 0;

  1931 			/* Did we send out the client's

  1932 			 * ECDH share for use in premaster

  1933 			 * computation as part of client certificate?

  1934 			 * If so, set ecdh_clnt_cert to 1.

  1935 			 */

  1936 			if ((l & SSL_kECDH) && (s->cert != NULL))

  1937 				{

  1938 				/* XXX: For now, we do not support client

  1939 				 * authentication using ECDH certificates.

  1940 				 * To add such support, one needs to add

  1941 				 * code that checks for appropriate

  1942 				 * conditions and sets ecdh_clnt_cert to 1.

  1943 				 * For example, the cert have an ECC

  1944 				 * key on the same curve as the server's

  1945 				 * and the key should be authorized for

  1946 				 * key agreement.

  1947 				 *

  1948 				 * One also needs to add code in ssl3_connect

  1949 				 * to skip sending the certificate verify

  1950 				 * message.

  1951 				 *

  1952 				 * if ((s->cert->key->privatekey != NULL) &&

  1953 				 *     (s->cert->key->privatekey->type ==

  1954 				 *      EVP_PKEY_EC) && ...)

  1955 				 * ecdh_clnt_cert = 1;

  1956 				 */

  1957 				}

  1959 			if (s->session->sess_cert->peer_ecdh_tmp != NULL)

  1960 				{

  1961 				tkey = s->session->sess_cert->peer_ecdh_tmp;

  1962 				}

  1963 			else

  1964 				{

  1965 				/* Get the Server Public Key from Cert */

  1966 				srvr_pub_pkey = X509_get_pubkey(s->session-> \

  1967 				    sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);

  1968 				if ((srvr_pub_pkey == NULL) ||

  1969 				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||

  1970 				    (srvr_pub_pkey->pkey.ec == NULL))

  1971 					{

  1972 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  1973 					    ERR_R_INTERNAL_ERROR);

  1974 					goto err;

  1975 					}

  1977 				tkey = srvr_pub_pkey->pkey.ec;

  1978 				}

  1980 			srvr_group   = EC_KEY_get0_group(tkey);

  1981 			srvr_ecpoint = EC_KEY_get0_public_key(tkey);

  1983 			if ((srvr_group == NULL) || (srvr_ecpoint == NULL))

  1984 				{

  1985 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  1986 				    ERR_R_INTERNAL_ERROR);

  1987 				goto err;

  1988 				}

  1990 			if ((clnt_ecdh=EC_KEY_new()) == NULL)

  1991 				{

  1992 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  1993 				goto err;

  1994 				}

  1996 			if (!EC_KEY_set_group(clnt_ecdh, srvr_group))

  1997 				{

  1998 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);

  1999 				goto err;

  2000 				}

  2001 			if (ecdh_clnt_cert)

  2002 				{

  2003 				/* Reuse key info from our certificate

  2004 				 * We only need our private key to perform

  2005 				 * the ECDH computation.

  2006 				 */

  2007 				const BIGNUM *priv_key;

  2008 				tkey = s->cert->key->privatekey->pkey.ec;

  2009 				priv_key = EC_KEY_get0_private_key(tkey);

  2010 				if (priv_key == NULL)

  2011 					{

  2012 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  2013 					goto err;

  2014 					}

  2015 				if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))

  2016 					{

  2017 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);

  2018 					goto err;

  2019 					}

  2020 				}

  2021 			else

  2022 				{

  2023 				/* Generate a new ECDH key pair */

  2024 				if (!(EC_KEY_generate_key(clnt_ecdh)))

  2025 					{

  2026 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);

  2027 					goto err;

  2028 					}

  2029 				}

  2031 			/* use the 'p' output buffer for the ECDH key, but

  2032 			 * make sure to clear it out afterwards

  2033 			 */

  2035 			field_size = EC_GROUP_get_degree(srvr_group);

  2036 			if (field_size <= 0)

  2037 				{

  2038 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  2039 				       ERR_R_ECDH_LIB);

  2040 				goto err;

  2041 				}

  2042 			n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);

  2043 			if (n <= 0)

  2044 				{

  2045 				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  2046 				       ERR_R_ECDH_LIB);

  2047 				goto err;

  2048 				}

  2050 			/* generate master key from the result */

  2051 			s->session->master_key_length = s->method->ssl3_enc \

  2052 			    -> generate_master_secret(s,

  2053 				s->session->master_key,

  2054 				p, n);

  2056 			memset(p, 0, n); /* clean up */

  2058 			if (ecdh_clnt_cert)

  2059 				{

  2060 				/* Send empty client key exch message */

  2061 				n = 0;

  2062 				}

  2063 			else

  2064 				{

  2065 				/* First check the size of encoding and

  2066 				 * allocate memory accordingly.

  2067 				 */

  2068 				encoded_pt_len =

  2069 				    EC_POINT_point2oct(srvr_group,

  2070 					EC_KEY_get0_public_key(clnt_ecdh),

  2071 					POINT_CONVERSION_UNCOMPRESSED,

  2072 					NULL, 0, NULL);

  2074 				encodedPoint = (unsigned char *)

  2075 				    OPENSSL_malloc(encoded_pt_len *

  2076 					sizeof(unsigned char));

  2077 				bn_ctx = BN_CTX_new();

  2078 				if ((encodedPoint == NULL) ||

  2079 				    (bn_ctx == NULL))

  2080 					{

  2081 					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);

  2082 					goto err;

  2083 					}

  2085 				/* Encode the public key */

  2086 				n = EC_POINT_point2oct(srvr_group,

  2087 				    EC_KEY_get0_public_key(clnt_ecdh),

  2088 				    POINT_CONVERSION_UNCOMPRESSED,

  2089 				    encodedPoint, encoded_pt_len, bn_ctx);

  2091 				*p = n; /* length of encoded point */

  2092 				/* Encoded point will be copied here */

  2093 				p += 1;

  2094 				/* copy the point */

  2095 				memcpy((unsigned char *)p, encodedPoint, n);

  2096 				/* increment n to account for length field */

  2097 				n += 1;

  2098 				}

  2100 			/* Free allocated memory */

  2101 			BN_CTX_free(bn_ctx);

  2102 			if (encodedPoint != NULL) OPENSSL_free(encodedPoint);

  2103 			if (clnt_ecdh != NULL)

  2104 				 EC_KEY_free(clnt_ecdh);

  2105 			EVP_PKEY_free(srvr_pub_pkey);

  2106 			}

  2107 #endif /* !OPENSSL_NO_ECDH */

  2108 		else

  2109 			{

  2110 			ssl3_send_alert(s, SSL3_AL_FATAL,

  2111 			    SSL_AD_HANDSHAKE_FAILURE);

  2112 			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,

  2113 			    ERR_R_INTERNAL_ERROR);

  2114 			goto err;

  2115 			}

  2117 		*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;

  2118 		l2n3(n,d);

  2120 		s->state=SSL3_ST_CW_KEY_EXCH_B;

  2121 		/* number of bytes to write */

  2122 		s->init_num=n+4;

  2123 		s->init_off=0;

  2124 		}

  2126 	/* SSL3_ST_CW_KEY_EXCH_B */

  2127 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));

  2128 err:

  2129 #ifndef OPENSSL_NO_ECDH

  2130 	BN_CTX_free(bn_ctx);

  2131 	if (encodedPoint != NULL) OPENSSL_free(encodedPoint);

  2132 	if (clnt_ecdh != NULL)

  2133 		EC_KEY_free(clnt_ecdh);

  2134 	EVP_PKEY_free(srvr_pub_pkey);

  2135 #endif

  2136 	return(-1);

  2137 	}

  2139 int ssl3_send_client_verify(SSL *s)

  2140 	{

  2141 	unsigned char *p,*d;

  2142 	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];

  2143 	EVP_PKEY *pkey;

  2144 #ifndef OPENSSL_NO_RSA

  2145 	unsigned u=0;

  2146 #endif

  2147 	unsigned long n;

  2148 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)

  2149 	int j;

  2150 #endif

  2152 	if (s->state == SSL3_ST_CW_CERT_VRFY_A)

  2153 		{

  2154 		d=(unsigned char *)s->init_buf->data;

  2155 		p= &(d[4]);

  2156 		pkey=s->cert->key->privatekey;

  2158 		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),

  2159 			&(data[MD5_DIGEST_LENGTH]));

  2161 #ifndef OPENSSL_NO_RSA

  2162 		if (pkey->type == EVP_PKEY_RSA)

  2163 			{

  2164 			s->method->ssl3_enc->cert_verify_mac(s,

  2165 				&(s->s3->finish_dgst1),&(data[0]));

  2166 			if (RSA_sign(NID_md5_sha1, data,

  2167 					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,

  2168 					&(p[2]), &u, pkey->pkey.rsa) <= 0 )

  2169 				{

  2170 				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);

  2171 				goto err;

  2172 				}

  2173 			s2n(u,p);

  2174 			n=u+2;

  2175 			}

  2176 		else

  2177 #endif

  2178 #ifndef OPENSSL_NO_DSA

  2179 			if (pkey->type == EVP_PKEY_DSA)

  2180 			{

  2181 			if (!DSA_sign(pkey->save_type,

  2182 				&(data[MD5_DIGEST_LENGTH]),

  2183 				SHA_DIGEST_LENGTH,&(p[2]),

  2184 				(unsigned int *)&j,pkey->pkey.dsa))

  2185 				{

  2186 				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);

  2187 				goto err;

  2188 				}

  2189 			s2n(j,p);

  2190 			n=j+2;

  2191 			}

  2192 		else

  2193 #endif

  2194 #ifndef OPENSSL_NO_ECDSA

  2195 			if (pkey->type == EVP_PKEY_EC)

  2196 			{

  2197 			if (!ECDSA_sign(pkey->save_type,

  2198 				&(data[MD5_DIGEST_LENGTH]),

  2199 				SHA_DIGEST_LENGTH,&(p[2]),

  2200 				(unsigned int *)&j,pkey->pkey.ec))

  2201 				{

  2202 				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,

  2203 				    ERR_R_ECDSA_LIB);

  2204 				goto err;

  2205 				}

  2206 			s2n(j,p);

  2207 			n=j+2;

  2208 			}

  2209 		else

  2210 #endif

  2211 			{

  2212 			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);

  2213 			goto err;

  2214 			}

  2215 		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;

  2216 		l2n3(n,d);

  2218 		s->state=SSL3_ST_CW_CERT_VRFY_B;

  2219 		s->init_num=(int)n+4;

  2220 		s->init_off=0;

  2221 		}

  2222 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));

  2223 err:

  2224 	return(-1);

  2225 	}

  2227 int ssl3_send_client_certificate(SSL *s)

  2228 	{

  2229 	X509 *x509=NULL;

  2230 	EVP_PKEY *pkey=NULL;

  2231 	int i;

  2232 	unsigned long l;

  2234 	if (s->state ==	SSL3_ST_CW_CERT_A)

  2235 		{

  2236 		if ((s->cert == NULL) ||

  2237 			(s->cert->key->x509 == NULL) ||

  2238 			(s->cert->key->privatekey == NULL))

  2239 			s->state=SSL3_ST_CW_CERT_B;

  2240 		else

  2241 			s->state=SSL3_ST_CW_CERT_C;

  2242 		}

  2244 	/* We need to get a client cert */

  2245 	if (s->state == SSL3_ST_CW_CERT_B)

  2246 		{

  2247 		/* If we get an error, we need to

  2248 		 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);

  2249 		 * We then get retied later */

  2250 		i=0;

  2251 		if (s->ctx->client_cert_cb != NULL)

  2252 			i=s->ctx->client_cert_cb(s,&(x509),&(pkey));

  2253 		if (i < 0)

  2254 			{

  2255 			s->rwstate=SSL_X509_LOOKUP;

  2256 			return(-1);

  2257 			}

  2258 		s->rwstate=SSL_NOTHING;

  2259 		if ((i == 1) && (pkey != NULL) && (x509 != NULL))

  2260 			{

  2261 			s->state=SSL3_ST_CW_CERT_B;

  2262 			if (	!SSL_use_certificate(s,x509) ||

  2263 				!SSL_use_PrivateKey(s,pkey))

  2264 				i=0;

  2265 			}

  2266 		else if (i == 1)

  2267 			{

  2268 			i=0;

  2269 			SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);

  2270 			}

  2272 		if (x509 != NULL) X509_free(x509);

  2273 		if (pkey != NULL) EVP_PKEY_free(pkey);

  2274 		if (i == 0)

  2275 			{

  2276 			if (s->version == SSL3_VERSION)

  2277 				{

  2278 				s->s3->tmp.cert_req=0;

  2279 				ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);

  2280 				return(1);

  2281 				}

  2282 			else

  2283 				{

  2284 				s->s3->tmp.cert_req=2;

  2285 				}

  2286 			}

  2288 		/* Ok, we have a cert */

  2289 		s->state=SSL3_ST_CW_CERT_C;

  2290 		}

  2292 	if (s->state == SSL3_ST_CW_CERT_C)

  2293 		{

  2294 		s->state=SSL3_ST_CW_CERT_D;

  2295 		l=ssl3_output_cert_chain(s,

  2296 			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);

  2297 		s->init_num=(int)l;

  2298 		s->init_off=0;

  2299 		}

  2300 	/* SSL3_ST_CW_CERT_D */

  2301 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));

  2302 	}

  2304 #define has_bits(i,m)	(((i)&(m)) == (m))

  2306 int ssl3_check_cert_and_algorithm(SSL *s)

  2307 	{

  2308 	int i,idx;

  2309 	long algs;

  2310 	EVP_PKEY *pkey=NULL;

  2311 	SESS_CERT *sc;

  2312 #ifndef OPENSSL_NO_RSA

  2313 	RSA *rsa;

  2314 #endif

  2315 #ifndef OPENSSL_NO_DH

  2316 	DH *dh;

  2317 #endif

  2319 	sc=s->session->sess_cert;

  2321 	algs=s->s3->tmp.new_cipher->algorithms;

  2323 	/* we don't have a certificate */

  2324 	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))

  2325 		return(1);

  2327 	if (sc == NULL)

  2328 		{

  2329 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);

  2330 		goto err;

  2331 		}

  2333 #ifndef OPENSSL_NO_RSA

  2334 	rsa=s->session->sess_cert->peer_rsa_tmp;

  2335 #endif

  2336 #ifndef OPENSSL_NO_DH

  2337 	dh=s->session->sess_cert->peer_dh_tmp;

  2338 #endif

  2340 	/* This is the passed certificate */

  2342 	idx=sc->peer_cert_type;

  2343 #ifndef OPENSSL_NO_ECDH

  2344 	if (idx == SSL_PKEY_ECC)

  2345 		{

  2346 		if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,

  2347 		    s->s3->tmp.new_cipher) == 0)

  2348 			{ /* check failed */

  2349 			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);

  2350 			goto f_err;

  2351 			}

  2352 		else

  2353 			{

  2354 			return 1;

  2355 			}

  2356 		}

  2357 #endif

  2358 	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);

  2359 	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);

  2360 	EVP_PKEY_free(pkey);

  2363 	/* Check that we have a certificate if we require one */

  2364 	if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))

  2365 		{

  2366 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);

  2367 		goto f_err;

  2368 		}

  2369 #ifndef OPENSSL_NO_DSA

  2370 	else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))

  2371 		{

  2372 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);

  2373 		goto f_err;

  2374 		}

  2375 #endif

  2376 #ifndef OPENSSL_NO_RSA

  2377 	if ((algs & SSL_kRSA) &&

  2378 		!(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))

  2379 		{

  2380 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);

  2381 		goto f_err;

  2382 		}

  2383 #endif

  2384 #ifndef OPENSSL_NO_DH

  2385 	if ((algs & SSL_kEDH) &&

  2386 		!(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))

  2387 		{

  2388 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);

  2389 		goto f_err;

  2390 		}

  2391 	else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))

  2392 		{

  2393 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);

  2394 		goto f_err;

  2395 		}

  2396 #ifndef OPENSSL_NO_DSA

  2397 	else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))

  2398 		{

  2399 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);

  2400 		goto f_err;

  2401 		}

  2402 #endif

  2403 #endif

  2405 	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))

  2406 		{

  2407 #ifndef OPENSSL_NO_RSA

  2408 		if (algs & SSL_kRSA)

  2409 			{

  2410 			if (rsa == NULL

  2411 			    || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))

  2412 				{

  2413 				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);

  2414 				goto f_err;

  2415 				}

  2416 			}

  2417 		else

  2418 #endif

  2419 #ifndef OPENSSL_NO_DH

  2420 			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))

  2421 			    {

  2422 			    if (dh == NULL

  2423 				|| DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))

  2424 				{

  2425 				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);

  2426 				goto f_err;

  2427 				}

  2428 			}

  2429 		else

  2430 #endif

  2431 			{

  2432 			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);

  2433 			goto f_err;

  2434 			}

  2435 		}

  2436 	return(1);

  2437 f_err:

  2438 	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);

  2439 err:

  2440 	return(0);

  2441 	}

  2444 #ifndef OPENSSL_NO_ECDH

  2445 /* This is the complement of nid2curve_id in s3_srvr.c. */

  2446 static int curve_id2nid(int curve_id)

  2447 {

  2448 	/* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)

  2449 	 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */

  2450 	static int nid_list[26] =

  2451 	{

  2452 		0,

  2453 		NID_sect163k1, /* sect163k1 (1) */

  2454 		NID_sect163r1, /* sect163r1 (2) */

  2455 		NID_sect163r2, /* sect163r2 (3) */

  2456 		NID_sect193r1, /* sect193r1 (4) */

  2457 		NID_sect193r2, /* sect193r2 (5) */

  2458 		NID_sect233k1, /* sect233k1 (6) */

  2459 		NID_sect233r1, /* sect233r1 (7) */

  2460 		NID_sect239k1, /* sect239k1 (8) */

  2461 		NID_sect283k1, /* sect283k1 (9) */

  2462 		NID_sect283r1, /* sect283r1 (10) */

  2463 		NID_sect409k1, /* sect409k1 (11) */

  2464 		NID_sect409r1, /* sect409r1 (12) */

  2465 		NID_sect571k1, /* sect571k1 (13) */

  2466 		NID_sect571r1, /* sect571r1 (14) */

  2467 		NID_secp160k1, /* secp160k1 (15) */

  2468 		NID_secp160r1, /* secp160r1 (16) */

  2469 		NID_secp160r2, /* secp160r2 (17) */

  2470 		NID_secp192k1, /* secp192k1 (18) */

  2471 		NID_X9_62_prime192v1, /* secp192r1 (19) */

  2472 		NID_secp224k1, /* secp224k1 (20) */

  2473 		NID_secp224r1, /* secp224r1 (21) */

  2474 		NID_secp256k1, /* secp256k1 (22) */

  2475 		NID_X9_62_prime256v1, /* secp256r1 (23) */

  2476 		NID_secp384r1, /* secp384r1 (24) */

  2477 		NID_secp521r1  /* secp521r1 (25) */

  2478 	};

  2480 	if ((curve_id < 1) || (curve_id > 25)) return 0;

  2482 	return nid_list[curve_id];

  2483 }

  2484 #endif

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--