s3_clnt.c 63.2 KB
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/* ssl/s3_clnt.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
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/* ====================================================================
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 * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
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 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
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/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * Portions of the attached software ("Contribution") are developed by 
 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 *
 * The Contribution is licensed pursuant to the OpenSSL open source
 * license provided above.
 *
 * ECC cipher suite support in OpenSSL originally written by
 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
 *
 */
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/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */
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#include <stdio.h>
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#include "ssl_locl.h"
#include "kssl_lcl.h"
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#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
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#include <openssl/md5.h>
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#ifndef OPENSSL_NO_DH
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#include <openssl/dh.h>
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#endif
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#include <openssl/bn.h>
163

164
static const SSL_METHOD *ssl3_get_client_method(int ver);
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static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
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167
static const SSL_METHOD *ssl3_get_client_method(int ver)
168
	{
169
	if (ver == SSL3_VERSION)
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		return(SSLv3_client_method());
	else
		return(NULL);
	}

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IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
			ssl_undefined_function,
			ssl3_connect,
			ssl3_get_client_method)
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int ssl3_connect(SSL *s)
181
	{
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	BUF_MEM *buf=NULL;
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	unsigned long Time=(unsigned long)time(NULL),l;
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	long num1;
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	void (*cb)(const SSL *ssl,int type,int val)=NULL;
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	int ret= -1;
	int new_state,state,skip=0;;

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	RAND_add(&Time,sizeof(Time),0);
190
	ERR_clear_error();
191
	clear_sys_error();
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	if (s->info_callback != NULL)
		cb=s->info_callback;
	else if (s->ctx->info_callback != NULL)
		cb=s->ctx->info_callback;
	
	s->in_handshake++;
199
	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
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	for (;;)
		{
		state=s->state;

		switch(s->state)
			{
		case SSL_ST_RENEGOTIATE:
			s->new_session=1;
			s->state=SSL_ST_CONNECT;
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			s->ctx->stats.sess_connect_renegotiate++;
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			/* break */
		case SSL_ST_BEFORE:
		case SSL_ST_CONNECT:
		case SSL_ST_BEFORE|SSL_ST_CONNECT:
		case SSL_ST_OK|SSL_ST_CONNECT:

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			s->server=0;
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			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);

220
			if ((s->version & 0xff00 ) != 0x0300)
221
				{
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				SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
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				ret = -1;
				goto end;
				}
				
227
			/* s->version=SSL3_VERSION; */
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			s->type=SSL_ST_CONNECT;

			if (s->init_buf == NULL)
				{
				if ((buf=BUF_MEM_new()) == NULL)
					{
					ret= -1;
					goto end;
					}
				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
					{
					ret= -1;
					goto end;
					}
				s->init_buf=buf;
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				buf=NULL;
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				}

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

			/* setup buffing BIO */
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			if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
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			/* don't push the buffering BIO quite yet */

			ssl3_init_finished_mac(s);

			s->state=SSL3_ST_CW_CLNT_HELLO_A;
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			s->ctx->stats.sess_connect++;
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			s->init_num=0;
			break;

		case SSL3_ST_CW_CLNT_HELLO_A:
		case SSL3_ST_CW_CLNT_HELLO_B:

			s->shutdown=0;
			ret=ssl3_client_hello(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CR_SRVR_HELLO_A;
			s->init_num=0;

			/* turn on buffering for the next lot of output */
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			if (s->bbio != s->wbio)
				s->wbio=BIO_push(s->bbio,s->wbio);
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			break;

		case SSL3_ST_CR_SRVR_HELLO_A:
		case SSL3_ST_CR_SRVR_HELLO_B:
			ret=ssl3_get_server_hello(s);
			if (ret <= 0) goto end;
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			if (s->hit)
				s->state=SSL3_ST_CR_FINISHED_A;
			else
				s->state=SSL3_ST_CR_CERT_A;
			s->init_num=0;
			break;

		case SSL3_ST_CR_CERT_A:
		case SSL3_ST_CR_CERT_B:
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			/* Check if it is anon DH/ECDH */
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			/* or PSK */
			if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)
				&& !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK))
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				{
				ret=ssl3_get_server_certificate(s);
				if (ret <= 0) goto end;
				}
			else
				skip=1;
			s->state=SSL3_ST_CR_KEY_EXCH_A;
			s->init_num=0;
			break;

		case SSL3_ST_CR_KEY_EXCH_A:
		case SSL3_ST_CR_KEY_EXCH_B:
			ret=ssl3_get_key_exchange(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CR_CERT_REQ_A;
			s->init_num=0;

			/* at this point we check that we have the
			 * required stuff from the server */
			if (!ssl3_check_cert_and_algorithm(s))
				{
				ret= -1;
				goto end;
				}
			break;

		case SSL3_ST_CR_CERT_REQ_A:
		case SSL3_ST_CR_CERT_REQ_B:
			ret=ssl3_get_certificate_request(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CR_SRVR_DONE_A;
			s->init_num=0;
			break;

		case SSL3_ST_CR_SRVR_DONE_A:
		case SSL3_ST_CR_SRVR_DONE_B:
			ret=ssl3_get_server_done(s);
			if (ret <= 0) goto end;
			if (s->s3->tmp.cert_req)
				s->state=SSL3_ST_CW_CERT_A;
			else
				s->state=SSL3_ST_CW_KEY_EXCH_A;
			s->init_num=0;

			break;

		case SSL3_ST_CW_CERT_A:
		case SSL3_ST_CW_CERT_B:
		case SSL3_ST_CW_CERT_C:
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		case SSL3_ST_CW_CERT_D:
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			ret=ssl3_send_client_certificate(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CW_KEY_EXCH_A;
			s->init_num=0;
			break;

		case SSL3_ST_CW_KEY_EXCH_A:
		case SSL3_ST_CW_KEY_EXCH_B:
			ret=ssl3_send_client_key_exchange(s);
			if (ret <= 0) goto end;
			l=s->s3->tmp.new_cipher->algorithms;
			/* EAY EAY EAY need to check for DH fix cert
			 * sent back */
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			/* For TLS, cert_req is set to 2, so a cert chain
			 * of nothing is sent, but no verify packet is sent */
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			/* XXX: For now, we do not support client 
			 * authentication in ECDH cipher suites with
			 * ECDH (rather than ECDSA) certificates.
			 * We need to skip the certificate verify 
			 * message when client's ECDH public key is sent 
			 * inside the client certificate.
			 */
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			if (s->s3->tmp.cert_req == 1)
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				{
				s->state=SSL3_ST_CW_CERT_VRFY_A;
				}
			else
				{
				s->state=SSL3_ST_CW_CHANGE_A;
				s->s3->change_cipher_spec=0;
				}

			s->init_num=0;
			break;

		case SSL3_ST_CW_CERT_VRFY_A:
		case SSL3_ST_CW_CERT_VRFY_B:
			ret=ssl3_send_client_verify(s);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CW_CHANGE_A;
			s->init_num=0;
			s->s3->change_cipher_spec=0;
			break;

		case SSL3_ST_CW_CHANGE_A:
		case SSL3_ST_CW_CHANGE_B:
			ret=ssl3_send_change_cipher_spec(s,
				SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
			if (ret <= 0) goto end;
			s->state=SSL3_ST_CW_FINISHED_A;
			s->init_num=0;

			s->session->cipher=s->s3->tmp.new_cipher;
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#ifdef OPENSSL_NO_COMP
			s->session->compress_meth=0;
#else
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			if (s->s3->tmp.new_compression == NULL)
				s->session->compress_meth=0;
			else
				s->session->compress_meth=
					s->s3->tmp.new_compression->id;
404
#endif
405
			if (!s->method->ssl3_enc->setup_key_block(s))
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				{
				ret= -1;
				goto end;
				}

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			if (!s->method->ssl3_enc->change_cipher_state(s,
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				SSL3_CHANGE_CIPHER_CLIENT_WRITE))
				{
				ret= -1;
				goto end;
				}

			break;

		case SSL3_ST_CW_FINISHED_A:
		case SSL3_ST_CW_FINISHED_B:
			ret=ssl3_send_finished(s,
				SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
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				s->method->ssl3_enc->client_finished_label,
				s->method->ssl3_enc->client_finished_label_len);
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			if (ret <= 0) goto end;
			s->state=SSL3_ST_CW_FLUSH;

			/* clear flags */
			s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
			if (s->hit)
				{
				s->s3->tmp.next_state=SSL_ST_OK;
				if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
					{
					s->state=SSL_ST_OK;
					s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
					s->s3->delay_buf_pop_ret=0;
					}
				}
			else
				{
				s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
				}
			s->init_num=0;
			break;

		case SSL3_ST_CR_FINISHED_A:
		case SSL3_ST_CR_FINISHED_B:

			ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
452
				SSL3_ST_CR_FINISHED_B);
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			if (ret <= 0) goto end;

			if (s->hit)
				s->state=SSL3_ST_CW_CHANGE_A;
			else
				s->state=SSL_ST_OK;
			s->init_num=0;
			break;

		case SSL3_ST_CW_FLUSH:
			/* number of bytes to be flushed */
			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
			if (num1 > 0)
				{
				s->rwstate=SSL_WRITING;
				num1=BIO_flush(s->wbio);
				if (num1 <= 0) { ret= -1; goto end; }
				s->rwstate=SSL_NOTHING;
				}

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

		case SSL_ST_OK:
			/* clean a few things up */
			ssl3_cleanup_key_block(s);

480
			if (s->init_buf != NULL)
481
				{
482 483
				BUF_MEM_free(s->init_buf);
				s->init_buf=NULL;
484
				}
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			/* If we are not 'joining' the last two packets,
			 * remove the buffering now */
			if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
				ssl_free_wbio_buffer(s);
			/* else do it later in ssl3_write */
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			s->init_num=0;
			s->new_session=0;

			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
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			if (s->hit) s->ctx->stats.sess_hit++;
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			ret=1;
			/* s->server=0; */
			s->handshake_func=ssl3_connect;
501
			s->ctx->stats.sess_connect_good++;
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			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);

			goto end;
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			/* break; */
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		default:
			SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
			ret= -1;
			goto end;
			/* break; */
			}

		/* did we do anything */
		if (!s->s3->tmp.reuse_message && !skip)
			{
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			if (s->debug)
				{
				if ((ret=BIO_flush(s->wbio)) <= 0)
					goto end;
				}
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			if ((cb != NULL) && (s->state != state))
				{
				new_state=s->state;
				s->state=state;
				cb(s,SSL_CB_CONNECT_LOOP,1);
				s->state=new_state;
				}
			}
		skip=0;
		}
end:
535
	s->in_handshake--;
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	if (buf != NULL)
		BUF_MEM_free(buf);
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	if (cb != NULL)
		cb(s,SSL_CB_CONNECT_EXIT,ret);
	return(ret);
	}


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int ssl3_client_hello(SSL *s)
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	{
	unsigned char *buf;
	unsigned char *p,*d;
548
	int i;
549
	unsigned long Time,l;
550 551
#ifndef OPENSSL_NO_COMP
	int j;
552
	SSL_COMP *comp;
553
#endif
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	buf=(unsigned char *)s->init_buf->data;
	if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
		{
		if ((s->session == NULL) ||
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			(s->session->ssl_version != s->version) ||
			(s->session->not_resumable))
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			{
			if (!ssl_get_new_session(s,0))
				goto err;
			}
		/* else use the pre-loaded session */

		p=s->s3->client_random;
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		Time=(unsigned long)time(NULL);			/* Time */
569
		l2n(Time,p);
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		if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
			goto err;
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		/* Do the message type and length last */
		d=p= &(buf[4]);

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		*(p++)=s->version>>8;
		*(p++)=s->version&0xff;
578
		s->client_version=s->version;
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		/* Random stuff */
		memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
		p+=SSL3_RANDOM_SIZE;

		/* Session ID */
		if (s->new_session)
			i=0;
		else
			i=s->session->session_id_length;
		*(p++)=i;
		if (i != 0)
			{
592
			if (i > (int)sizeof(s->session->session_id))
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				{
				SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
				goto err;
				}
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			memcpy(p,s->session->session_id,i);
			p+=i;
			}
		
		/* Ciphers supported */
602
		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
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		if (i == 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
			goto err;
			}
		s2n(i,p);
		p+=i;

611
		/* COMPRESSION */
612 613 614
#ifdef OPENSSL_NO_COMP
		*(p++)=1;
#else
615 616 617

		if ((s->options & SSL_OP_NO_COMPRESSION)
					|| !s->ctx->comp_methods)
618 619
			j=0;
		else
B
Ben Laurie 已提交
620
			j=sk_SSL_COMP_num(s->ctx->comp_methods);
621 622 623
		*(p++)=1+j;
		for (i=0; i<j; i++)
			{
B
Ben Laurie 已提交
624
			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
625 626
			*(p++)=comp->id;
			}
627
#endif
628
		*(p++)=0; /* Add the NULL method */
629
#ifndef OPENSSL_NO_TLSEXT
630 631 632 633 634
		if (ssl_prepare_clienthello_tlsext(s) <= 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
			goto err;
			}
635 636
		if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
			{
637 638
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
			goto err;
639
			}
640
#endif
641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658
		
		l=(p-d);
		d=buf;
		*(d++)=SSL3_MT_CLIENT_HELLO;
		l2n3(l,d);

		s->state=SSL3_ST_CW_CLNT_HELLO_B;
		/* number of bytes to write */
		s->init_num=p-buf;
		s->init_off=0;
		}

	/* SSL3_ST_CW_CLNT_HELLO_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	return(-1);
	}

B
Ben Laurie 已提交
659
int ssl3_get_server_hello(SSL *s)
660
	{
B
Ben Laurie 已提交
661
	STACK_OF(SSL_CIPHER) *sk;
662 663 664 665 666
	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
667
#ifndef OPENSSL_NO_COMP
668
	SSL_COMP *comp;
669
#endif
670

B
Ben Laurie 已提交
671
	n=s->method->ssl_get_message(s,
672 673
		SSL3_ST_CR_SRVR_HELLO_A,
		SSL3_ST_CR_SRVR_HELLO_B,
B
Ben Laurie 已提交
674
		-1,
675 676 677 678
		300, /* ?? */
		&ok);

	if (!ok) return((int)n);
B
Ben Laurie 已提交
679 680 681 682 683 684 685 686 687 688 689 690 691

	if ( SSL_version(s) == DTLS1_VERSION)
		{
		if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
			{
			if ( s->d1->send_cookie == 0)
				{
				s->s3->tmp.reuse_message = 1;
				return 1;
				}
			else /* already sent a cookie */
				{
				al=SSL_AD_UNEXPECTED_MESSAGE;
692
				SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
693 694 695 696 697 698 699 700
				goto f_err;
				}
			}
		}
	
	if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
701
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
702 703 704
		goto f_err;
		}

705
	d=p=(unsigned char *)s->init_msg;
706

707
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
708 709
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
710 711 712
		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
713 714 715 716 717 718 719 720 721 722 723
		}
	p+=2;

	/* load the server hello data */
	/* load the server random */
	memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
	p+=SSL3_RANDOM_SIZE;

	/* get the session-id */
	j= *(p++);

724
	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
725
		{
726 727 728
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
		goto f_err;
729
		}
730

B
Ben Laurie 已提交
731 732 733 734 735 736
	if (j != 0 && j == s->session->session_id_length
	    && memcmp(p,s->session->session_id,j) == 0)
	    {
	    if(s->sid_ctx_length != s->session->sid_ctx_length
	       || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
		{
737
		/* actually a client application bug */
B
Ben Laurie 已提交
738 739 740 741 742 743
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
		goto f_err;
		}
	    s->hit=1;
	    }
744
	else	/* a miss or crap from the other end */
745
		{
746 747
		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
748
		s->hit=0;
749 750 751 752 753 754 755 756 757 758
		if (s->session->session_id_length > 0)
			{
			if (!ssl_get_new_session(s,0))
				{
				al=SSL_AD_INTERNAL_ERROR;
				goto f_err;
				}
			}
		s->session->session_id_length=j;
		memcpy(s->session->session_id,p,j); /* j could be 0 */
759 760 761 762 763 764
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
765
		al=SSL_AD_ILLEGAL_PARAMETER;
766 767 768 769 770 771
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
		goto f_err;
		}
	p+=ssl_put_cipher_by_char(s,NULL,NULL);

	sk=ssl_get_ciphers_by_id(s);
B
Ben Laurie 已提交
772
	i=sk_SSL_CIPHER_find(sk,c);
773 774 775
	if (i < 0)
		{
		/* we did not say we would use this cipher */
776
		al=SSL_AD_ILLEGAL_PARAMETER;
777 778 779 780
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

781 782 783 784 785
	/* Depending on the session caching (internal/external), the cipher
	   and/or cipher_id values may not be set. Make sure that
	   cipher_id is set and use it for comparison. */
	if (s->session->cipher)
		s->session->cipher_id = s->session->cipher->id;
786
	if (s->hit && (s->session->cipher_id != c->id))
787
		{
788
		if (!(s->options &
789 790
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
791
			al=SSL_AD_ILLEGAL_PARAMETER;
792 793 794 795 796 797 798
			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
			goto f_err;
			}
		}
	s->s3->tmp.new_cipher=c;

	/* lets get the compression algorithm */
799
	/* COMPRESSION */
800 801 802 803 804 805 806 807
#ifdef OPENSSL_NO_COMP
	if (*(p++) != 0)
		{
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
#else
808
	j= *(p++);
809
	if ((j == 0) || (s->options & SSL_OP_NO_COMPRESSION))
810 811 812 813 814
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
815
		{
816
		al=SSL_AD_ILLEGAL_PARAMETER;
817 818 819
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
820 821 822 823
	else
		{
		s->s3->tmp.new_compression=comp;
		}
824
#endif
825 826 827
#ifndef OPENSSL_NO_TLSEXT
	/* TLS extensions*/
	if (s->version > SSL3_VERSION)
828 829 830 831
		{
		if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
			{
			/* 'al' set by ssl_parse_serverhello_tlsext */
832
			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
833
			goto f_err; 
834
			}
835
		if (ssl_check_serverhello_tlsext(s) <= 0)
836
			{
837
			SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SERVERHELLO_TLSEXT);
838 839
				goto err;
			}
840 841
		}
#endif
842 843 844 845

	if (p != (d+n))
		{
		/* wrong packet length */
846
		al=SSL_AD_DECODE_ERROR;
847 848 849 850 851 852 853 854 855 856 857
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
		goto err;
		}

	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
	return(-1);
	}

B
Ben Laurie 已提交
858
int ssl3_get_server_certificate(SSL *s)
859 860 861 862
	{
	int al,i,ok,ret= -1;
	unsigned long n,nc,llen,l;
	X509 *x=NULL;
863 864
	const unsigned char *q,*p;
	unsigned char *d;
B
Ben Laurie 已提交
865
	STACK_OF(X509) *sk=NULL;
866
	SESS_CERT *sc;
867
	EVP_PKEY *pkey=NULL;
868
	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
869

B
Ben Laurie 已提交
870
	n=s->method->ssl_get_message(s,
871 872 873
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
874
		s->max_cert_list,
875 876 877 878 879 880 881 882 883 884 885 886
		&ok);

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

	if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE)
		{
		s->s3->tmp.reuse_message=1;
		return(1);
		}

	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
		{
887
		al=SSL_AD_UNEXPECTED_MESSAGE;
888 889 890
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
891
	p=d=(unsigned char *)s->init_msg;
892

B
Ben Laurie 已提交
893
	if ((sk=sk_X509_new_null()) == NULL)
894 895 896 897 898 899 900 901
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
902
		al=SSL_AD_DECODE_ERROR;
903 904 905 906 907 908 909 910
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
		goto f_err;
		}
	for (nc=0; nc<llen; )
		{
		n2l3(p,l);
		if ((l+nc+3) > llen)
			{
911
			al=SSL_AD_DECODE_ERROR;
912 913 914 915 916 917 918 919
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}

		q=p;
		x=d2i_X509(NULL,&q,l);
		if (x == NULL)
			{
920
			al=SSL_AD_BAD_CERTIFICATE;
921 922 923 924 925
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
926
			al=SSL_AD_DECODE_ERROR;
927 928 929
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
930
		if (!sk_X509_push(sk,x))
931 932 933 934 935 936 937 938 939 940
			{
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
			goto err;
			}
		x=NULL;
		nc+=l+3;
		p=q;
		}

	i=ssl_verify_cert_chain(s,sk);
941 942
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
#ifndef OPENSSL_NO_KRB5
943 944
	        && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
	        != (SSL_aKRB5|SSL_kKRB5)
945
#endif /* OPENSSL_NO_KRB5 */
946
	        )
947 948 949 950 951
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
952
	ERR_clear_error(); /* but we keep s->verify_result */
953

954 955
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
956

957 958
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
959

960
	sc->cert_chain=sk;
961 962
	/* Inconsistency alert: cert_chain does include the peer's
	 * certificate, which we don't include in s3_srvr.c */
B
Ben Laurie 已提交
963
	x=sk_X509_value(sk,0);
964
	sk=NULL;
965
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
966 967 968

	pkey=X509_get_pubkey(x);

969 970 971 972
	/* VRS: allow null cert if auth == KRB5 */
	need_cert =	((s->s3->tmp.new_cipher->algorithms
	                 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
	                 == (SSL_aKRB5|SSL_kKRB5))? 0: 1;
973 974 975 976 977

#ifdef KSSL_DEBUG
	printf("pkey,x = %p, %p\n", pkey,x);
	printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
	printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name,
978
	        s->s3->tmp.new_cipher->algorithms, need_cert);
979 980
#endif    /* KSSL_DEBUG */

981
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
982 983 984
		{
		x=NULL;
		al=SSL3_AL_FATAL;
985 986
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
987 988 989 990
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
991
	if (need_cert && i < 0)
992 993 994
		{
		x=NULL;
		al=SSL3_AL_FATAL;
995 996
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
997 998 999
		goto f_err;
		}

1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
	if (need_cert)
		{
		sc->peer_cert_type=i;
		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
		/* Why would the following ever happen?
		 * We just created sc a couple of lines ago. */
		if (sc->peer_pkeys[i].x509 != NULL)
			X509_free(sc->peer_pkeys[i].x509);
		sc->peer_pkeys[i].x509=x;
		sc->peer_key= &(sc->peer_pkeys[i]);

		if (s->session->peer != NULL)
			X509_free(s->session->peer);
		CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
		s->session->peer=x;
		}
	else
		{
		sc->peer_cert_type=i;
		sc->peer_key= NULL;

		if (s->session->peer != NULL)
			X509_free(s->session->peer);
		s->session->peer=NULL;
		}
1025
	s->session->verify_result = s->verify_result;
1026 1027 1028 1029 1030 1031 1032 1033 1034 1035

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
1036 1037
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
1038
	sk_X509_pop_free(sk,X509_free);
1039 1040 1041
	return(ret);
	}

B
Ben Laurie 已提交
1042
int ssl3_get_key_exchange(SSL *s)
1043
	{
1044
#ifndef OPENSSL_NO_RSA
1045 1046 1047 1048 1049 1050 1051
	unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
#endif
	EVP_MD_CTX md_ctx;
	unsigned char *param,*p;
	int al,i,j,param_len,ok;
	long n,alg;
	EVP_PKEY *pkey=NULL;
1052
#ifndef OPENSSL_NO_RSA
1053
	RSA *rsa=NULL;
1054
#endif
1055
#ifndef OPENSSL_NO_DH
1056
	DH *dh=NULL;
1057
#endif
B
Bodo Möller 已提交
1058 1059 1060 1061 1062 1063 1064
#ifndef OPENSSL_NO_ECDH
	EC_KEY *ecdh = NULL;
	BN_CTX *bn_ctx = NULL;
	EC_POINT *srvr_ecpoint = NULL;
	int curve_nid = 0;
	int encoded_pt_len = 0;
#endif
1065

1066 1067
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
B
Ben Laurie 已提交
1068
	n=s->method->ssl_get_message(s,
1069 1070 1071
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
1072
		s->max_cert_list,
1073 1074 1075 1076 1077
		&ok);
	if (!ok) return((int)n);

	if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
		{
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
#ifndef OPENSSL_NO_PSK
		/* In plain PSK ciphersuite, ServerKeyExchange can be
		   omitted if no identity hint is sent. Set
		   session->sess_cert anyway to avoid problems
		   later.*/
                if (s->s3->tmp.new_cipher->algorithms & SSL_kPSK)
			{
			s->session->sess_cert=ssl_sess_cert_new();
			if (s->ctx->psk_identity_hint)
				OPENSSL_free(s->ctx->psk_identity_hint);
			s->ctx->psk_identity_hint = NULL;
			}
#endif
1091 1092 1093 1094
		s->s3->tmp.reuse_message=1;
		return(1);
		}

1095
	param=p=(unsigned char *)s->init_msg;
1096
	if (s->session->sess_cert != NULL)
1097
		{
1098
#ifndef OPENSSL_NO_RSA
1099
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
1100
			{
1101 1102
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
1103 1104
			}
#endif
1105
#ifndef OPENSSL_NO_DH
1106
		if (s->session->sess_cert->peer_dh_tmp)
1107
			{
1108 1109
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
1110
			}
B
Bodo Möller 已提交
1111 1112 1113 1114 1115 1116 1117
#endif
#ifndef OPENSSL_NO_ECDH
		if (s->session->sess_cert->peer_ecdh_tmp)
			{
			EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
			s->session->sess_cert->peer_ecdh_tmp=NULL;
			}
1118 1119 1120 1121
#endif
		}
	else
		{
1122
		s->session->sess_cert=ssl_sess_cert_new();
1123 1124 1125 1126
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;
1127
	EVP_MD_CTX_init(&md_ctx);
1128

1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
#ifndef OPENSSL_NO_PSK
	if (alg & SSL_kPSK)
	        {
		char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];

		al=SSL_AD_HANDSHAKE_FAILURE;
		n2s(p,i);
		param_len=i+2;
		/* Store PSK identity hint for later use, hint is used
		 * in ssl3_send_client_key_exchange.  Assume that the
		 * maximum length of a PSK identity hint can be as
		 * long as the maximum length of a PSK identity. */
		if (i > PSK_MAX_IDENTITY_LEN)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
				SSL_R_DATA_LENGTH_TOO_LONG);
			goto f_err;
			}
		if (param_len > n)
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
				SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
			goto f_err;
			}
		/* If received PSK identity hint contains NULL
		 * characters, the hint is truncated from the first
		 * NULL. p may not be ending with NULL, so create a
		 * NULL-terminated string. */
		memcpy(tmp_id_hint, p, i);
		memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
		if (s->ctx->psk_identity_hint != NULL)
			OPENSSL_free(s->ctx->psk_identity_hint);
		s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
		if (s->ctx->psk_identity_hint == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
			goto f_err;
			}           

		p+=i;
		n-=param_len;
		}
	else
#endif /* !OPENSSL_NO_PSK */
1174
#ifndef OPENSSL_NO_RSA
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
	if (alg & SSL_kRSA)
		{
		if ((rsa=RSA_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}
		n2s(p,i);
		param_len=i+2;
		if (param_len > n)
			{
1186
			al=SSL_AD_DECODE_ERROR;
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
			goto f_err;
			}
		if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
1201
			al=SSL_AD_DECODE_ERROR;
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
			goto f_err;
			}
		if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;
		n-=param_len;

		/* this should be because we are using an export cipher */
		if (alg & SSL_aRSA)
1215
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1216 1217
		else
			{
B
Bodo Möller 已提交
1218
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1219 1220
			goto err;
			}
1221
		s->session->sess_cert->peer_rsa_tmp=rsa;
1222
		rsa=NULL;
1223
		}
1224
#else /* OPENSSL_NO_RSA */
1225 1226
	if (0)
		;
1227
#endif
1228
#ifndef OPENSSL_NO_DH
1229
	else if (alg & SSL_kEDH)
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
		{
		if ((dh=DH_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
			goto err;
			}
		n2s(p,i);
		param_len=i+2;
		if (param_len > n)
			{
1240
			al=SSL_AD_DECODE_ERROR;
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
			goto f_err;
			}
		if (!(dh->p=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
1255
			al=SSL_AD_DECODE_ERROR;
1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
			goto f_err;
			}
		if (!(dh->g=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;

		n2s(p,i);
		param_len+=i+2;
		if (param_len > n)
			{
1270
			al=SSL_AD_DECODE_ERROR;
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
			goto f_err;
			}
		if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
			goto err;
			}
		p+=i;
		n-=param_len;

1282
#ifndef OPENSSL_NO_RSA
1283
		if (alg & SSL_aRSA)
1284
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1285 1286 1287
#else
		if (0)
			;
1288
#endif
1289
#ifndef OPENSSL_NO_DSA
1290
		else if (alg & SSL_aDSS)
1291
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1292 1293 1294
#endif
		/* else anonymous DH, so no certificate or pkey. */

1295
		s->session->sess_cert->peer_dh_tmp=dh;
1296
		dh=NULL;
1297 1298 1299
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1300
		al=SSL_AD_ILLEGAL_PARAMETER;
1301 1302 1303
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
1304
#endif /* !OPENSSL_NO_DH */
B
Bodo Möller 已提交
1305 1306

#ifndef OPENSSL_NO_ECDH
1307
	else if (alg & SSL_kEECDH)
B
Bodo Möller 已提交
1308
		{
N
Nils Larsch 已提交
1309 1310 1311
		EC_GROUP *ngroup;
		const EC_GROUP *group;

B
Bodo Möller 已提交
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
		if ((ecdh=EC_KEY_new()) == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		/* Extract elliptic curve parameters and the
		 * server's ephemeral ECDH public key.
		 * Keep accumulating lengths of various components in
		 * param_len and make sure it never exceeds n.
		 */

		/* XXX: For now we only support named (not generic) curves
B
Bodo Möller 已提交
1325
		 * and the ECParameters in this case is just three bytes.
B
Bodo Möller 已提交
1326
		 */
B
Bodo Möller 已提交
1327
		param_len=3;
B
Bodo Möller 已提交
1328 1329
		if ((param_len > n) ||
		    (*p != NAMED_CURVE_TYPE) || 
1330
		    ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 
B
Bodo Möller 已提交
1331 1332 1333 1334 1335 1336
			{
			al=SSL_AD_INTERNAL_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
			goto f_err;
			}

N
Nils Larsch 已提交
1337 1338 1339 1340 1341 1342 1343
		ngroup = EC_GROUP_new_by_curve_name(curve_nid);
		if (ngroup == NULL)
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
			goto err;
			}
		if (EC_KEY_set_group(ecdh, ngroup) == 0)
B
Bodo Möller 已提交
1344 1345 1346 1347
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
			goto err;
			}
N
Nils Larsch 已提交
1348 1349 1350
		EC_GROUP_free(ngroup);

		group = EC_KEY_get0_group(ecdh);
B
Bodo Möller 已提交
1351 1352

		if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
N
Nils Larsch 已提交
1353
		    (EC_GROUP_get_degree(group) > 163))
B
Bodo Möller 已提交
1354 1355 1356 1357 1358 1359
			{
			al=SSL_AD_EXPORT_RESTRICTION;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
			goto f_err;
			}

B
Bodo Möller 已提交
1360
		p+=3;
B
Bodo Möller 已提交
1361 1362

		/* Next, get the encoded ECPoint */
N
Nils Larsch 已提交
1363
		if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
B
Bodo Möller 已提交
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
		    ((bn_ctx = BN_CTX_new()) == NULL))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		encoded_pt_len = *p;  /* length of encoded point */
		p+=1;
		param_len += (1 + encoded_pt_len);
		if ((param_len > n) ||
N
Nils Larsch 已提交
1374
		    (EC_POINT_oct2point(group, srvr_ecpoint, 
B
Bodo Möller 已提交
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398
			p, encoded_pt_len, bn_ctx) == 0))
			{
			al=SSL_AD_DECODE_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
			goto f_err;
			}

		n-=param_len;
		p+=encoded_pt_len;

		/* The ECC/TLS specification does not mention
		 * the use of DSA to sign ECParameters in the server
		 * key exchange message. We do support RSA and ECDSA.
		 */
		if (0) ;
#ifndef OPENSSL_NO_RSA
		else if (alg & SSL_aRSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
#endif
#ifndef OPENSSL_NO_ECDSA
		else if (alg & SSL_aECDSA)
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
#endif
		/* else anonymous ECDH, so no certificate or pkey. */
N
Nils Larsch 已提交
1399
		EC_KEY_set_public_key(ecdh, srvr_ecpoint);
B
Bodo Möller 已提交
1400 1401 1402
		s->session->sess_cert->peer_ecdh_tmp=ecdh;
		ecdh=NULL;
		BN_CTX_free(bn_ctx);
N
Nils Larsch 已提交
1403
		EC_POINT_free(srvr_ecpoint);
B
Bodo Möller 已提交
1404 1405
		srvr_ecpoint = NULL;
		}
1406
	else if (alg)
B
Bodo Möller 已提交
1407 1408 1409 1410 1411 1412
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
		goto f_err;
		}
#endif /* !OPENSSL_NO_ECDH */
1413

1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426

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

	/* if it was signed, check the signature */
	if (pkey != NULL)
		{
		n2s(p,i);
		n-=2;
		j=EVP_PKEY_size(pkey);

		if ((i != n) || (n > j) || (n <= 0))
			{
			/* wrong packet length */
1427
			al=SSL_AD_DECODE_ERROR;
1428
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1429
			goto f_err;
1430 1431
			}

1432
#ifndef OPENSSL_NO_RSA
1433 1434 1435 1436 1437 1438 1439 1440
		if (pkey->type == EVP_PKEY_RSA)
			{
			int num;

			j=0;
			q=md_buf;
			for (num=2; num > 0; num--)
				{
D
 
Dr. Stephen Henson 已提交
1441 1442
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
1443 1444 1445
				EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
				EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
				EVP_DigestUpdate(&md_ctx,param,param_len);
D
 
Dr. Stephen Henson 已提交
1446
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1447 1448 1449
				q+=i;
				j+=i;
				}
1450 1451 1452
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1453
				{
1454
				al=SSL_AD_DECRYPT_ERROR;
1455 1456 1457
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1458
			if (i == 0)
1459 1460
				{
				/* bad signature */
1461
				al=SSL_AD_DECRYPT_ERROR;
1462 1463 1464 1465 1466 1467
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
1468
#ifndef OPENSSL_NO_DSA
1469 1470 1471
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
D
 
Dr. Stephen Henson 已提交
1472
			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1473 1474 1475 1476 1477 1478
			EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,param,param_len);
			if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
				{
				/* bad signature */
1479
				al=SSL_AD_DECRYPT_ERROR;
1480 1481 1482 1483 1484
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
B
Bodo Möller 已提交
1485 1486
#endif
#ifndef OPENSSL_NO_ECDSA
1487
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502
			{
			/* let's do ECDSA */
			EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL);
			EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
			EVP_VerifyUpdate(&md_ctx,param,param_len);
			if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey))
				{
				/* bad signature */
				al=SSL_AD_DECRYPT_ERROR;
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
1503 1504
#endif
			{
B
Bodo Möller 已提交
1505
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1506 1507 1508 1509 1510
			goto err;
			}
		}
	else
		{
1511 1512
		if (!(alg & SSL_aNULL) && !(alg & SSL_kPSK))
			/* aNULL or kPSK do not need public keys */
1513
			{
B
Bodo Möller 已提交
1514
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1515 1516
			goto err;
			}
1517
		/* still data left over */
1518 1519
		if (n != 0)
			{
1520
			al=SSL_AD_DECODE_ERROR;
1521 1522 1523 1524
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1525
	EVP_PKEY_free(pkey);
1526
	EVP_MD_CTX_cleanup(&md_ctx);
1527 1528 1529 1530
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1531
	EVP_PKEY_free(pkey);
1532
#ifndef OPENSSL_NO_RSA
1533 1534 1535
	if (rsa != NULL)
		RSA_free(rsa);
#endif
1536
#ifndef OPENSSL_NO_DH
1537 1538
	if (dh != NULL)
		DH_free(dh);
B
Bodo Möller 已提交
1539 1540 1541 1542 1543 1544
#endif
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	EC_POINT_free(srvr_ecpoint);
	if (ecdh != NULL)
		EC_KEY_free(ecdh);
1545
#endif
1546
	EVP_MD_CTX_cleanup(&md_ctx);
1547 1548 1549
	return(-1);
	}

B
Ben Laurie 已提交
1550
int ssl3_get_certificate_request(SSL *s)
1551 1552
	{
	int ok,ret=0;
1553 1554
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1555
	X509_NAME *xn=NULL;
1556 1557
	const unsigned char *p,*q;
	unsigned char *d;
B
Ben Laurie 已提交
1558
	STACK_OF(X509_NAME) *ca_sk=NULL;
1559

B
Ben Laurie 已提交
1560
	n=s->method->ssl_get_message(s,
1561 1562 1563
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
1564
		s->max_cert_list,
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578
		&ok);

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

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

	if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
		{
		s->s3->tmp.reuse_message=1;
		return(1);
		}

	if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
		{
1579
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1580 1581 1582 1583
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
	/* TLS does not like anon-DH with client cert */
	if (s->version > SSL3_VERSION)
		{
		l=s->s3->tmp.new_cipher->algorithms;
		if (l & SSL_aNULL)
			{
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
			goto err;
			}
		}

1596
	p=d=(unsigned char *)s->init_msg;
1597

B
Ben Laurie 已提交
1598
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613
		{
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	/* get the certificate types */
	ctype_num= *(p++);
	if (ctype_num > SSL3_CT_NUMBER)
		ctype_num=SSL3_CT_NUMBER;
	for (i=0; i<ctype_num; i++)
		s->s3->tmp.ctype[i]= p[i];
	p+=ctype_num;

	/* get the CA RDNs */
	n2s(p,llen);
1614 1615 1616 1617 1618 1619 1620 1621 1622
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1623 1624
	if ((llen+ctype_num+2+1) != n)
		{
1625
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1626 1627 1628 1629 1630 1631 1632 1633 1634
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
		goto err;
		}

	for (nc=0; nc<llen; )
		{
		n2s(p,l);
		if ((l+nc+2) > llen)
			{
1635
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1636
				goto cont; /* netscape bugs */
1637
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1638 1639 1640 1641 1642 1643 1644 1645
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
			goto err;
			}

		q=p;

		if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
			{
U
Ulf Möller 已提交
1646
			/* If netscape tolerance is on, ignore errors */
1647
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1648 1649 1650
				goto cont;
			else
				{
1651
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1652 1653 1654 1655 1656 1657 1658
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1659
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1660 1661 1662
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1663
		if (!sk_X509_NAME_push(ca_sk,xn))
1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678
			{
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		p+=l;
		nc+=l+2;
		}

	if (0)
		{
cont:
		ERR_clear_error();
		}

U
Ulf Möller 已提交
1679
	/* we should setup a certificate to return.... */
1680 1681 1682
	s->s3->tmp.cert_req=1;
	s->s3->tmp.ctype_num=ctype_num;
	if (s->s3->tmp.ca_names != NULL)
B
Ben Laurie 已提交
1683
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1684 1685 1686 1687 1688
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1689
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1690 1691 1692
	return(ret);
	}

1693
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1694 1695 1696 1697
	{
	return(X509_NAME_cmp(*a,*b));
	}

B
Ben Laurie 已提交
1698
int ssl3_get_server_done(SSL *s)
1699 1700 1701 1702
	{
	int ok,ret=0;
	long n;

B
Ben Laurie 已提交
1703
	n=s->method->ssl_get_message(s,
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713
		SSL3_ST_CR_SRVR_DONE_A,
		SSL3_ST_CR_SRVR_DONE_B,
		SSL3_MT_SERVER_DONE,
		30, /* should be very small, like 0 :-) */
		&ok);

	if (!ok) return((int)n);
	if (n > 0)
		{
		/* should contain no data */
1714
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1715
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1716
		return -1;
1717 1718 1719 1720 1721
		}
	ret=1;
	return(ret);
	}

1722

B
Ben Laurie 已提交
1723
int ssl3_send_client_key_exchange(SSL *s)
1724
	{
1725
	unsigned char *p,*d;
1726 1727
	int n;
	unsigned long l;
1728
#ifndef OPENSSL_NO_RSA
1729
	unsigned char *q;
1730
	EVP_PKEY *pkey=NULL;
1731
#endif
1732
#ifndef OPENSSL_NO_KRB5
1733
	KSSL_ERR kssl_err;
1734
#endif /* OPENSSL_NO_KRB5 */
B
Bodo Möller 已提交
1735 1736
#ifndef OPENSSL_NO_ECDH
	EC_KEY *clnt_ecdh = NULL;
N
Nils Larsch 已提交
1737
	const EC_POINT *srvr_ecpoint = NULL;
B
Bodo Möller 已提交
1738 1739 1740 1741 1742
	EVP_PKEY *srvr_pub_pkey = NULL;
	unsigned char *encodedPoint = NULL;
	int encoded_pt_len = 0;
	BN_CTX * bn_ctx = NULL;
#endif
1743 1744 1745 1746 1747 1748 1749 1750

	if (s->state == SSL3_ST_CW_KEY_EXCH_A)
		{
		d=(unsigned char *)s->init_buf->data;
		p= &(d[4]);

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

1751 1752
		/* Fool emacs indentation */
		if (0) {}
1753
#ifndef OPENSSL_NO_RSA
1754
		else if (l & SSL_kRSA)
1755 1756
			{
			RSA *rsa;
1757
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1758

1759 1760
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1761 1762
			else
				{
1763
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1764 1765 1766 1767
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1768
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1769 1770 1771
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1772
				EVP_PKEY_free(pkey);
1773 1774
				}
				
1775 1776
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1777
			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1778
					goto err;
1779

1780
			s->session->master_key_length=sizeof tmp_buf;
1781

1782 1783 1784 1785
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
1786
			n=RSA_public_encrypt(sizeof tmp_buf,
1787
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1788 1789 1790 1791
#ifdef PKCS1_CHECK
			if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
			if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
#endif
1792 1793 1794 1795 1796 1797
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1798 1799 1800 1801 1802 1803 1804
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1805
			s->session->master_key_length=
1806
				s->method->ssl3_enc->generate_master_secret(s,
1807
					s->session->master_key,
1808
					tmp_buf,sizeof tmp_buf);
1809
			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1810
			}
1811
#endif
1812
#ifndef OPENSSL_NO_KRB5
1813
		else if (l & SSL_kKRB5)
1814 1815 1816 1817 1818 1819
			{
			krb5_error_code	krb5rc;
			KSSL_CTX	*kssl_ctx = s->kssl_ctx;
			/*  krb5_data	krb5_ap_req;  */
			krb5_data	*enc_ticket;
			krb5_data	authenticator, *authp = NULL;
1820 1821 1822 1823 1824 1825 1826
			EVP_CIPHER_CTX	ciph_ctx;
			EVP_CIPHER	*enc = NULL;
			unsigned char	iv[EVP_MAX_IV_LENGTH];
			unsigned char	tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
			unsigned char	epms[SSL_MAX_MASTER_KEY_LENGTH 
						+ EVP_MAX_IV_LENGTH];
			int 		padl, outl = sizeof(epms);
1827

D
 
Dr. Stephen Henson 已提交
1828 1829
			EVP_CIPHER_CTX_init(&ciph_ctx);

1830
#ifdef KSSL_DEBUG
1831 1832
			printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
			        l, SSL_kKRB5);
1833 1834
#endif	/* KSSL_DEBUG */

1835 1836 1837 1838 1839
			authp = NULL;
#ifdef KRB5SENDAUTH
			if (KRB5SENDAUTH)  authp = &authenticator;
#endif	/* KRB5SENDAUTH */

1840
			krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1841 1842
				&kssl_err);
			enc = kssl_map_enc(kssl_ctx->enctype);
1843 1844
			if (enc == NULL)
			    goto err;
1845
#ifdef KSSL_DEBUG
1846 1847 1848
			{
			printf("kssl_cget_tkt rtn %d\n", krb5rc);
			if (krb5rc && kssl_err.text)
1849
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1850
			}
1851 1852
#endif	/* KSSL_DEBUG */

1853 1854 1855
			if (krb5rc)
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,
1856
						SSL_AD_HANDSHAKE_FAILURE);
1857
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1858
						kssl_err.reason);
1859 1860
				goto err;
				}
1861

1862 1863 1864
			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
			**  in place of RFC 2712 KerberosWrapper, as in:
			**
1865 1866 1867 1868 1869 1870
			**  Send ticket (copy to *p, set n = length)
			**  n = krb5_ap_req.length;
			**  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
			**  if (krb5_ap_req.data)  
			**    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
			**
1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
			**  Now using real RFC 2712 KerberosWrapper
			**  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
			**  Note: 2712 "opaque" types are here replaced
			**  with a 2-byte length followed by the value.
			**  Example:
			**  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
			**  Where "xx xx" = length bytes.  Shown here with
			**  optional authenticator omitted.
			*/

			/*  KerberosWrapper.Ticket		*/
			s2n(enc_ticket->length,p);
			memcpy(p, enc_ticket->data, enc_ticket->length);
			p+= enc_ticket->length;
			n = enc_ticket->length + 2;

			/*  KerberosWrapper.Authenticator	*/
			if (authp  &&  authp->length)  
				{
				s2n(authp->length,p);
				memcpy(p, authp->data, authp->length);
				p+= authp->length;
				n+= authp->length + 2;
				
				free(authp->data);
				authp->data = NULL;
				authp->length = 0;
				}
			else
				{
				s2n(0,p);/*  null authenticator length	*/
				n+=2;
				}
 
1905
			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1906 1907 1908
			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.
1909
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1910 1911
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1912
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1913 1914
			*/

1915
			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1916 1917
			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
				kssl_ctx->key,iv);
1918
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1919
				sizeof tmp_buf);
1920
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1921
			outl += padl;
B
Bodo Möller 已提交
1922 1923 1924 1925 1926
			if (outl > sizeof epms)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
				goto err;
				}
1927 1928 1929 1930 1931 1932 1933 1934
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

			/*  KerberosWrapper.EncryptedPreMasterSecret	*/
			s2n(outl,p);
			memcpy(p, epms, outl);
			p+=outl;
			n+=outl + 2;

1935 1936
			s->session->master_key_length=
			        s->method->ssl3_enc->generate_master_secret(s,
1937
					s->session->master_key,
1938
					tmp_buf, sizeof tmp_buf);
1939

1940 1941
			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
			OPENSSL_cleanse(epms, outl);
1942
			}
1943
#endif
1944
#ifndef OPENSSL_NO_DH
1945
		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1946 1947 1948
			{
			DH *dh_srvr,*dh_clnt;

1949 1950
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1951 1952 1953
			else
				{
				/* we get them from the cert */
1954
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
				goto err;
				}
			
			/* generate a new random key */
			if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				goto err;
				}
			if (!DH_generate_key(dh_clnt))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				goto err;
				}

			/* use the 'p' output buffer for the DH key, but
			 * make sure to clear it out afterwards */
1973

1974
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1975

1976 1977 1978 1979 1980 1981 1982 1983
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
				goto err;
				}

			/* generate master key from the result */
			s->session->master_key_length=
1984
				s->method->ssl3_enc->generate_master_secret(s,
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
					s->session->master_key,p,n);
			/* clean up */
			memset(p,0,n);

			/* send off the data */
			n=BN_num_bytes(dh_clnt->pub_key);
			s2n(n,p);
			BN_bn2bin(dh_clnt->pub_key,p);
			n+=2;

			DH_free(dh_clnt);

			/* perhaps clean things up a bit EAY EAY EAY EAY*/
			}
#endif
B
Bodo Möller 已提交
2000 2001

#ifndef OPENSSL_NO_ECDH 
2002
		else if ((l & SSL_kECDH) || (l & SSL_kEECDH))
B
Bodo Möller 已提交
2003
			{
N
Nils Larsch 已提交
2004 2005
			const EC_GROUP *srvr_group = NULL;
			EC_KEY *tkey;
B
Bodo Möller 已提交
2006
			int ecdh_clnt_cert = 0;
2007
			int field_size = 0;
B
Bodo Möller 已提交
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031

			/* Did we send out the client's
			 * ECDH share for use in premaster
			 * computation as part of client certificate?
			 * If so, set ecdh_clnt_cert to 1.
			 */
			if ((l & SSL_kECDH) && (s->cert != NULL)) 
				{
				/* XXX: For now, we do not support client
				 * authentication using ECDH certificates.
				 * To add such support, one needs to add
				 * code that checks for appropriate 
				 * conditions and sets ecdh_clnt_cert to 1.
				 * For example, the cert have an ECC
				 * key on the same curve as the server's
				 * and the key should be authorized for
				 * key agreement.
				 *
				 * One also needs to add code in ssl3_connect
				 * to skip sending the certificate verify
				 * message.
				 *
				 * if ((s->cert->key->privatekey != NULL) &&
				 *     (s->cert->key->privatekey->type ==
B
Bodo Möller 已提交
2032
				 *      EVP_PKEY_EC) && ...)
B
Bodo Möller 已提交
2033 2034 2035 2036 2037 2038
				 * ecdh_clnt_cert = 1;
				 */
				}

			if (s->session->sess_cert->peer_ecdh_tmp != NULL)
				{
N
Nils Larsch 已提交
2039
				tkey = s->session->sess_cert->peer_ecdh_tmp;
B
Bodo Möller 已提交
2040 2041 2042 2043 2044 2045 2046
				}
			else
				{
				/* Get the Server Public Key from Cert */
				srvr_pub_pkey = X509_get_pubkey(s->session-> \
				    sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
				if ((srvr_pub_pkey == NULL) ||
2047
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
N
Nils Larsch 已提交
2048
				    (srvr_pub_pkey->pkey.ec == NULL))
B
Bodo Möller 已提交
2049 2050 2051 2052 2053 2054
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					    ERR_R_INTERNAL_ERROR);
					goto err;
					}

N
Nils Larsch 已提交
2055
				tkey = srvr_pub_pkey->pkey.ec;
B
Bodo Möller 已提交
2056 2057
				}

N
Nils Larsch 已提交
2058 2059 2060
			srvr_group   = EC_KEY_get0_group(tkey);
			srvr_ecpoint = EC_KEY_get0_public_key(tkey);

B
Bodo Möller 已提交
2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
			if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
				    ERR_R_INTERNAL_ERROR);
				goto err;
				}

			if ((clnt_ecdh=EC_KEY_new()) == NULL) 
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
				goto err;
				}

N
Nils Larsch 已提交
2074 2075 2076 2077 2078
			if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
				goto err;
				}
B
Bodo Möller 已提交
2079 2080
			if (ecdh_clnt_cert) 
				{ 
2081
				/* Reuse key info from our certificate
B
Bodo Möller 已提交
2082 2083 2084
				 * We only need our private key to perform
				 * the ECDH computation.
				 */
N
Nils Larsch 已提交
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097
				const BIGNUM *priv_key;
				tkey = s->cert->key->privatekey->pkey.ec;
				priv_key = EC_KEY_get0_private_key(tkey);
				if (priv_key == NULL)
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
					goto err;
					}
				if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
					goto err;
					}
B
Bodo Möller 已提交
2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
				}
			else 
				{
				/* Generate a new ECDH key pair */
				if (!(EC_KEY_generate_key(clnt_ecdh)))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
					goto err;
					}
				}

2109 2110
			/* use the 'p' output buffer for the ECDH key, but
			 * make sure to clear it out afterwards
B
Bodo Möller 已提交
2111 2112
			 */

N
Nils Larsch 已提交
2113
			field_size = EC_GROUP_get_degree(srvr_group);
2114 2115 2116 2117 2118 2119
			if (field_size <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_LIB);
				goto err;
				}
B
Bodo Möller 已提交
2120
			n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
B
Bodo Möller 已提交
2121
			if (n <= 0)
2122 2123
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
B
Bodo Möller 已提交
2124
				       ERR_R_ECDH_LIB);
2125
				goto err;
B
Bodo Möller 已提交
2126 2127
				}

2128 2129
			/* generate master key from the result */
			s->session->master_key_length = s->method->ssl3_enc \
B
Bodo Möller 已提交
2130 2131 2132 2133
			    -> generate_master_secret(s, 
				s->session->master_key,
				p, n);

2134
			memset(p, 0, n); /* clean up */
B
Bodo Möller 已提交
2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146

			if (ecdh_clnt_cert) 
				{
				/* Send empty client key exch message */
				n = 0;
				}
			else 
				{
				/* First check the size of encoding and
				 * allocate memory accordingly.
				 */
				encoded_pt_len = 
N
Nils Larsch 已提交
2147 2148
				    EC_POINT_point2oct(srvr_group, 
					EC_KEY_get0_public_key(clnt_ecdh), 
B
Bodo Möller 已提交
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
					POINT_CONVERSION_UNCOMPRESSED, 
					NULL, 0, NULL);

				encodedPoint = (unsigned char *) 
				    OPENSSL_malloc(encoded_pt_len * 
					sizeof(unsigned char)); 
				bn_ctx = BN_CTX_new();
				if ((encodedPoint == NULL) || 
				    (bn_ctx == NULL)) 
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
					goto err;
					}

				/* Encode the public key */
N
Nils Larsch 已提交
2164 2165
				n = EC_POINT_point2oct(srvr_group, 
				    EC_KEY_get0_public_key(clnt_ecdh), 
B
Bodo Möller 已提交
2166 2167 2168 2169
				    POINT_CONVERSION_UNCOMPRESSED, 
				    encodedPoint, encoded_pt_len, bn_ctx);

				*p = n; /* length of encoded point */
2170
				/* Encoded point will be copied here */
B
Bodo Möller 已提交
2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185
				p += 1; 
				/* copy the point */
				memcpy((unsigned char *)p, encodedPoint, n);
				/* increment n to account for length field */
				n += 1; 
				}

			/* Free allocated memory */
			BN_CTX_free(bn_ctx);
			if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
			if (clnt_ecdh != NULL) 
				 EC_KEY_free(clnt_ecdh);
			EVP_PKEY_free(srvr_pub_pkey);
			}
#endif /* !OPENSSL_NO_ECDH */
2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267
#ifndef OPENSSL_NO_PSK
		else if (l & SSL_kPSK)
			{
			char identity[PSK_MAX_IDENTITY_LEN];
			unsigned char *t = NULL;
			unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
			unsigned int pre_ms_len = 0, psk_len = 0;
			int psk_err = 1;

			n = 0;
			if (s->psk_client_callback == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					SSL_R_PSK_NO_CLIENT_CB);
				goto err;
				}

			psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
				identity, PSK_MAX_IDENTITY_LEN,
				psk_or_pre_ms, sizeof(psk_or_pre_ms));
			if (psk_len > PSK_MAX_PSK_LEN)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_INTERNAL_ERROR);
				goto psk_err;
				}
			else if (psk_len == 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					SSL_R_PSK_IDENTITY_NOT_FOUND);
				goto psk_err;
				}

			/* create PSK pre_master_secret */
			pre_ms_len = 2+psk_len+2+psk_len;
			t = psk_or_pre_ms;
			memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
			s2n(psk_len, t);
			memset(t, 0, psk_len);
			t+=psk_len;
			s2n(psk_len, t);

			if (s->session->psk_identity_hint != NULL)
				OPENSSL_free(s->session->psk_identity_hint);
			s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
			if (s->ctx->psk_identity_hint != NULL &&
				s->session->psk_identity_hint == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_MALLOC_FAILURE);
				goto psk_err;
				}

			if (s->session->psk_identity != NULL)
				OPENSSL_free(s->session->psk_identity);
			s->session->psk_identity = BUF_strdup(identity);
			if (s->session->psk_identity == NULL)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					ERR_R_MALLOC_FAILURE);
				goto psk_err;
				}

			s->session->master_key_length =
				s->method->ssl3_enc->generate_master_secret(s,
					s->session->master_key,
					psk_or_pre_ms, pre_ms_len); 
			n = strlen(identity);
			s2n(n, p);
			memcpy(p, identity, n);
			n+=2;
			psk_err = 0;
		psk_err:
			OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
			OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));	
			if (psk_err != 0)
				{
				ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
				goto err;
				}
			}
#endif
2268
		else
2269
			{
B
Bodo Möller 已提交
2270 2271 2272 2273
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
			goto err;
			}
		
		*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
		l2n3(n,d);

		s->state=SSL3_ST_CW_KEY_EXCH_B;
		/* number of bytes to write */
		s->init_num=n+4;
		s->init_off=0;
		}

	/* SSL3_ST_CW_KEY_EXCH_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
B
Bodo Möller 已提交
2289 2290 2291 2292 2293
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
	if (clnt_ecdh != NULL) 
		EC_KEY_free(clnt_ecdh);
2294
	EVP_PKEY_free(srvr_pub_pkey);
B
Bodo Möller 已提交
2295
#endif
2296 2297 2298
	return(-1);
	}

B
Ben Laurie 已提交
2299
int ssl3_send_client_verify(SSL *s)
2300 2301 2302 2303
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
2304
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
2305
	unsigned u=0;
2306
#endif
2307
	unsigned long n;
N
make  
Nils Larsch 已提交
2308
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2309 2310
	int j;
#endif
2311 2312 2313 2314 2315 2316 2317

	if (s->state == SSL3_ST_CW_CERT_VRFY_A)
		{
		d=(unsigned char *)s->init_buf->data;
		p= &(d[4]);
		pkey=s->cert->key->privatekey;

2318 2319
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
2320

2321
#ifndef OPENSSL_NO_RSA
2322 2323
		if (pkey->type == EVP_PKEY_RSA)
			{
2324 2325
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
2326 2327
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
2328
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
2329 2330 2331 2332
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
2333 2334
			s2n(u,p);
			n=u+2;
2335 2336 2337
			}
		else
#endif
2338
#ifndef OPENSSL_NO_DSA
2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352
			if (pkey->type == EVP_PKEY_DSA)
			{
			if (!DSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
				(unsigned int *)&j,pkey->pkey.dsa))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
B
Bodo Möller 已提交
2353 2354
#endif
#ifndef OPENSSL_NO_ECDSA
2355
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
2356 2357 2358 2359
			{
			if (!ECDSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
N
Nils Larsch 已提交
2360
				(unsigned int *)&j,pkey->pkey.ec))
B
Bodo Möller 已提交
2361 2362 2363 2364 2365 2366 2367 2368 2369
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
				    ERR_R_ECDSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
2370 2371
#endif
			{
B
Bodo Möller 已提交
2372
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2373 2374 2375 2376 2377
			goto err;
			}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

2378
		s->state=SSL3_ST_CW_CERT_VRFY_B;
2379 2380 2381 2382 2383 2384 2385 2386
		s->init_num=(int)n+4;
		s->init_off=0;
		}
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	return(-1);
	}

B
Ben Laurie 已提交
2387
int ssl3_send_client_certificate(SSL *s)
2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435
	{
	X509 *x509=NULL;
	EVP_PKEY *pkey=NULL;
	int i;
	unsigned long l;

	if (s->state ==	SSL3_ST_CW_CERT_A)
		{
		if ((s->cert == NULL) ||
			(s->cert->key->x509 == NULL) ||
			(s->cert->key->privatekey == NULL))
			s->state=SSL3_ST_CW_CERT_B;
		else
			s->state=SSL3_ST_CW_CERT_C;
		}

	/* We need to get a client cert */
	if (s->state == SSL3_ST_CW_CERT_B)
		{
		/* If we get an error, we need to
		 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
		 * We then get retied later */
		i=0;
		if (s->ctx->client_cert_cb != NULL)
			i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
		if (i < 0)
			{
			s->rwstate=SSL_X509_LOOKUP;
			return(-1);
			}
		s->rwstate=SSL_NOTHING;
		if ((i == 1) && (pkey != NULL) && (x509 != NULL))
			{
			s->state=SSL3_ST_CW_CERT_B;
			if (	!SSL_use_certificate(s,x509) ||
				!SSL_use_PrivateKey(s,pkey))
				i=0;
			}
		else if (i == 1)
			{
			i=0;
			SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
			}

		if (x509 != NULL) X509_free(x509);
		if (pkey != NULL) EVP_PKEY_free(pkey);
		if (i == 0)
			{
2436 2437 2438 2439 2440 2441 2442 2443 2444 2445
			if (s->version == SSL3_VERSION)
				{
				s->s3->tmp.cert_req=0;
				ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
				return(1);
				}
			else
				{
				s->s3->tmp.cert_req=2;
				}
2446 2447 2448 2449 2450 2451 2452 2453 2454
			}

		/* Ok, we have a cert */
		s->state=SSL3_ST_CW_CERT_C;
		}

	if (s->state == SSL3_ST_CW_CERT_C)
		{
		s->state=SSL3_ST_CW_CERT_D;
2455 2456
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2457 2458 2459 2460 2461 2462 2463 2464 2465
		s->init_num=(int)l;
		s->init_off=0;
		}
	/* SSL3_ST_CW_CERT_D */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
	}

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

B
Ben Laurie 已提交
2466
int ssl3_check_cert_and_algorithm(SSL *s)
2467 2468 2469 2470
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
2471
	SESS_CERT *sc;
2472
#ifndef OPENSSL_NO_RSA
2473
	RSA *rsa;
2474
#endif
2475
#ifndef OPENSSL_NO_DH
2476
	DH *dh;
2477
#endif
2478

2479 2480
	sc=s->session->sess_cert;
	if (sc == NULL)
2481
		{
B
Bodo Möller 已提交
2482
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2483 2484 2485 2486 2487 2488
		goto err;
		}

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

	/* we don't have a certificate */
2489
	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5|SSL_kPSK))
2490 2491
		return(1);

2492
#ifndef OPENSSL_NO_RSA
2493
	rsa=s->session->sess_cert->peer_rsa_tmp;
2494
#endif
2495
#ifndef OPENSSL_NO_DH
2496
	dh=s->session->sess_cert->peer_dh_tmp;
2497
#endif
2498 2499 2500

	/* This is the passed certificate */

2501
	idx=sc->peer_cert_type;
B
Bodo Möller 已提交
2502 2503 2504
#ifndef OPENSSL_NO_ECDH
	if (idx == SSL_PKEY_ECC)
		{
2505
		if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
B
Bodo Möller 已提交
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516
		    s->s3->tmp.new_cipher) == 0) 
			{ /* check failed */
			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
			goto f_err;			
			}
		else 
			{
			return 1;
			}
		}
#endif
2517 2518
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2519
	EVP_PKEY_free(pkey);
2520 2521 2522 2523 2524 2525 2526 2527

	
	/* Check that we have a certificate if we require one */
	if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
		goto f_err;
		}
2528
#ifndef OPENSSL_NO_DSA
2529 2530 2531 2532 2533 2534
	else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
		goto f_err;
		}
#endif
2535
#ifndef OPENSSL_NO_RSA
2536 2537 2538 2539 2540 2541
	if ((algs & SSL_kRSA) &&
		!(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
		goto f_err;
		}
2542
#endif
2543
#ifndef OPENSSL_NO_DH
2544
	if ((algs & SSL_kEDH) &&
2545 2546 2547 2548 2549 2550 2551 2552 2553 2554
		!(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
		goto f_err;
		}
	else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
		goto f_err;
		}
2555
#ifndef OPENSSL_NO_DSA
2556 2557 2558 2559 2560 2561 2562 2563
	else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
		goto f_err;
		}
#endif
#endif

2564
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2565
		{
2566
#ifndef OPENSSL_NO_RSA
2567 2568
		if (algs & SSL_kRSA)
			{
2569
			if (rsa == NULL
2570
			    || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2571 2572 2573 2574 2575 2576 2577
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
2578
#ifndef OPENSSL_NO_DH
2579
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2580 2581
			    {
			    if (dh == NULL
2582
				|| DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
				goto f_err;
				}
			}
		else
#endif
			{
			SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
			goto f_err;
			}
		}
	return(1);
f_err:
2597
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2598 2599 2600
err:
	return(0);
	}