s3_clnt.c 63.5 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) 1998-2007 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);
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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);
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	ERR_clear_error();
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	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++;
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	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;
				}
				
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			/* 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 */
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			if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
			    !(s->s3->tmp.new_cipher->algorithm_mkey & 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;
			/* 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;
403
#endif
404
			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,
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				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);

479
			if (s->init_buf != NULL)
480
				{
481 482
				BUF_MEM_free(s->init_buf);
				s->init_buf=NULL;
483
				}
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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;
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			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:
534
	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)
544 545 546
	{
	unsigned char *buf;
	unsigned char *p,*d;
547
	int i;
548
	unsigned long Time,l;
549 550
#ifndef OPENSSL_NO_COMP
	int j;
551
	SSL_COMP *comp;
552
#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 */
568
		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;
577
		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)
			{
591
			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 */
601
		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;

610
		/* COMPRESSION */
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#ifdef OPENSSL_NO_COMP
		*(p++)=1;
#else
614 615 616

		if ((s->options & SSL_OP_NO_COMPRESSION)
					|| !s->ctx->comp_methods)
617 618
			j=0;
		else
B
Ben Laurie 已提交
619
			j=sk_SSL_COMP_num(s->ctx->comp_methods);
620 621 622
		*(p++)=1+j;
		for (i=0; i<j; i++)
			{
B
Ben Laurie 已提交
623
			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
624 625
			*(p++)=comp->id;
			}
626
#endif
627
		*(p++)=0; /* Add the NULL method */
628
#ifndef OPENSSL_NO_TLSEXT
629 630 631 632 633
		if (ssl_prepare_clienthello_tlsext(s) <= 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
			goto err;
			}
634 635
		if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
			{
636 637
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
			goto err;
638
			}
639
#endif
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657
		
		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
658
int ssl3_get_server_hello(SSL *s)
659
	{
B
Ben Laurie 已提交
660
	STACK_OF(SSL_CIPHER) *sk;
661 662 663 664 665
	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
666
#ifndef OPENSSL_NO_COMP
667
	SSL_COMP *comp;
668
#endif
669

B
Ben Laurie 已提交
670
	n=s->method->ssl_get_message(s,
671 672
		SSL3_ST_CR_SRVR_HELLO_A,
		SSL3_ST_CR_SRVR_HELLO_B,
B
Ben Laurie 已提交
673
		-1,
674 675 676 677
		300, /* ?? */
		&ok);

	if (!ok) return((int)n);
B
Ben Laurie 已提交
678 679 680 681 682 683 684 685 686 687 688 689 690

	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;
691
				SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
692 693 694 695 696 697 698 699
				goto f_err;
				}
			}
		}
	
	if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
700
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
701 702 703
		goto f_err;
		}

704
	d=p=(unsigned char *)s->init_msg;
705

706
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
707 708
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
709 710 711
		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
712 713 714 715 716 717 718 719 720 721 722
		}
	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++);

723
	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
724
		{
725 726 727
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
		goto f_err;
728
		}
729

B
Ben Laurie 已提交
730 731 732 733 734 735
	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))
		{
736
		/* actually a client application bug */
B
Ben Laurie 已提交
737 738 739 740 741 742
		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;
	    }
743
	else	/* a miss or crap from the other end */
744
		{
745 746
		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
747
		s->hit=0;
748 749 750 751 752 753 754 755 756 757
		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 */
758 759 760 761 762 763
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
764
		al=SSL_AD_ILLEGAL_PARAMETER;
765 766 767 768 769 770
		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
771
	i=sk_SSL_CIPHER_find(sk,c);
772 773 774
	if (i < 0)
		{
		/* we did not say we would use this cipher */
775
		al=SSL_AD_ILLEGAL_PARAMETER;
776 777 778 779
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

780 781 782 783 784
	/* 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;
785
	if (s->hit && (s->session->cipher_id != c->id))
786
		{
787
		if (!(s->options &
788 789
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
790
			al=SSL_AD_ILLEGAL_PARAMETER;
791 792 793 794 795 796 797
			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 */
798
	/* COMPRESSION */
799 800 801 802 803 804 805 806
#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
807
	j= *(p++);
808
	if ((j == 0) || (s->options & SSL_OP_NO_COMPRESSION))
809 810 811 812 813
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
814
		{
815
		al=SSL_AD_ILLEGAL_PARAMETER;
816 817 818
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
819 820 821 822
	else
		{
		s->s3->tmp.new_compression=comp;
		}
823
#endif
824 825 826
#ifndef OPENSSL_NO_TLSEXT
	/* TLS extensions*/
	if (s->version > SSL3_VERSION)
827 828 829 830
		{
		if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
			{
			/* 'al' set by ssl_parse_serverhello_tlsext */
831
			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
832
			goto f_err; 
833
			}
834
		if (ssl_check_serverhello_tlsext(s) <= 0)
835
			{
B
Bodo Möller 已提交
836
			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
837 838
				goto err;
			}
839 840
		}
#endif
841 842 843 844

	if (p != (d+n))
		{
		/* wrong packet length */
845
		al=SSL_AD_DECODE_ERROR;
846 847 848 849 850 851 852 853 854 855 856
		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
857
int ssl3_get_server_certificate(SSL *s)
858 859 860 861
	{
	int al,i,ok,ret= -1;
	unsigned long n,nc,llen,l;
	X509 *x=NULL;
862 863
	const unsigned char *q,*p;
	unsigned char *d;
B
Ben Laurie 已提交
864
	STACK_OF(X509) *sk=NULL;
865
	SESS_CERT *sc;
866
	EVP_PKEY *pkey=NULL;
867
	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
868

B
Ben Laurie 已提交
869
	n=s->method->ssl_get_message(s,
870 871 872
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
873
		s->max_cert_list,
874 875 876 877 878 879 880 881 882 883 884 885
		&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)
		{
886
		al=SSL_AD_UNEXPECTED_MESSAGE;
887 888 889
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
890
	p=d=(unsigned char *)s->init_msg;
891

B
Ben Laurie 已提交
892
	if ((sk=sk_X509_new_null()) == NULL)
893 894 895 896 897 898 899 900
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
901
		al=SSL_AD_DECODE_ERROR;
902 903 904 905 906 907 908 909
		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)
			{
910
			al=SSL_AD_DECODE_ERROR;
911 912 913 914 915 916 917 918
			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)
			{
919
			al=SSL_AD_BAD_CERTIFICATE;
920 921 922 923 924
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
925
			al=SSL_AD_DECODE_ERROR;
926 927 928
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
929
		if (!sk_X509_push(sk,x))
930 931 932 933 934 935 936 937 938 939
			{
			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);
940 941
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
#ifndef OPENSSL_NO_KRB5
942 943
	    && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
		 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
944
#endif /* OPENSSL_NO_KRB5 */
945
		)
946 947 948 949 950
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
951
	ERR_clear_error(); /* but we keep s->verify_result */
952

953 954
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
955

956 957
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
958

959
	sc->cert_chain=sk;
960 961
	/* 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
962
	x=sk_X509_value(sk,0);
963
	sk=NULL;
964
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
965 966 967

	pkey=X509_get_pubkey(x);

968
	/* VRS: allow null cert if auth == KRB5 */
969 970 971
	need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
	            (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
	            ? 0 : 1;
972 973 974 975

#ifdef KSSL_DEBUG
	printf("pkey,x = %p, %p\n", pkey,x);
	printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
976 977
	printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
		s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
978 979
#endif    /* KSSL_DEBUG */

980
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
981 982 983
		{
		x=NULL;
		al=SSL3_AL_FATAL;
984 985
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
986 987 988 989
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
990
	if (need_cert && i < 0)
991 992 993
		{
		x=NULL;
		al=SSL3_AL_FATAL;
994 995
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
996 997 998
		goto f_err;
		}

999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
	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;
		}
1024
	s->session->verify_result = s->verify_result;
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
1035 1036
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
1037
	sk_X509_pop_free(sk,X509_free);
1038 1039 1040
	return(ret);
	}

B
Ben Laurie 已提交
1041
int ssl3_get_key_exchange(SSL *s)
1042
	{
1043
#ifndef OPENSSL_NO_RSA
1044 1045 1046 1047 1048
	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;
1049
	long n,alg_k,alg_a;
1050
	EVP_PKEY *pkey=NULL;
1051
#ifndef OPENSSL_NO_RSA
1052
	RSA *rsa=NULL;
1053
#endif
1054
#ifndef OPENSSL_NO_DH
1055
	DH *dh=NULL;
1056
#endif
B
Bodo Möller 已提交
1057 1058 1059 1060 1061 1062 1063
#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
1064

1065 1066
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
B
Ben Laurie 已提交
1067
	n=s->method->ssl_get_message(s,
1068 1069 1070
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
1071
		s->max_cert_list,
1072 1073 1074 1075 1076
		&ok);
	if (!ok) return((int)n);

	if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
		{
1077 1078 1079 1080 1081
#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.*/
1082
		if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1083 1084 1085 1086 1087 1088 1089
			{
			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
1090 1091 1092 1093
		s->s3->tmp.reuse_message=1;
		return(1);
		}

1094
	param=p=(unsigned char *)s->init_msg;
1095
	if (s->session->sess_cert != NULL)
1096
		{
1097
#ifndef OPENSSL_NO_RSA
1098
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
1099
			{
1100 1101
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
1102 1103
			}
#endif
1104
#ifndef OPENSSL_NO_DH
1105
		if (s->session->sess_cert->peer_dh_tmp)
1106
			{
1107 1108
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
1109
			}
B
Bodo Möller 已提交
1110 1111 1112 1113 1114 1115 1116
#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;
			}
1117 1118 1119 1120
#endif
		}
	else
		{
1121
		s->session->sess_cert=ssl_sess_cert_new();
1122 1123 1124
		}

	param_len=0;
1125 1126
	alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
	alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1127
	EVP_MD_CTX_init(&md_ctx);
1128

1129
#ifndef OPENSSL_NO_PSK
1130 1131
	if (alg_k & SSL_kPSK)
		{
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
		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;
1167
			}	   
1168 1169 1170 1171 1172 1173

		p+=i;
		n-=param_len;
		}
	else
#endif /* !OPENSSL_NO_PSK */
1174
#ifndef OPENSSL_NO_RSA
1175
	if (alg_k & SSL_kRSA)
1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
		{
		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
			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 */
1214
		if (alg_a & 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_k & 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_a & 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_a & 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
	else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1299
		{
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_k & 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
			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
1391
		else if (alg_a & SSL_aRSA)
B
Bodo Möller 已提交
1392 1393 1394
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
#endif
#ifndef OPENSSL_NO_ECDSA
1395
		else if (alg_a & SSL_aECDSA)
B
Bodo Möller 已提交
1396 1397 1398
			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_k)
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
		if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1512
			/* 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
	/* TLS does not like anon-DH with client cert */
	if (s->version > SSL3_VERSION)
		{
1587
		if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1588 1589 1590 1591 1592 1593 1594
			{
			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;
			}
		}

1595
	p=d=(unsigned char *)s->init_msg;
1596

B
Ben Laurie 已提交
1597
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612
		{
		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);
1613 1614 1615 1616 1617 1618 1619 1620 1621
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1622 1623
	if ((llen+ctype_num+2+1) != n)
		{
1624
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1625 1626 1627 1628 1629 1630 1631 1632 1633
		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)
			{
1634
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1635
				goto cont; /* netscape bugs */
1636
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1637 1638 1639 1640 1641 1642 1643 1644
			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
1645
			/* If netscape tolerance is on, ignore errors */
1646
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1647 1648 1649
				goto cont;
			else
				{
1650
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1651 1652 1653 1654 1655 1656 1657
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1658
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1659 1660 1661
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1662
		if (!sk_X509_NAME_push(ca_sk,xn))
1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
			{
			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
1678
	/* we should setup a certificate to return.... */
1679 1680 1681
	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
1682
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1683 1684 1685 1686 1687
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1688
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1689 1690 1691
	return(ret);
	}

1692
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1693 1694 1695 1696
	{
	return(X509_NAME_cmp(*a,*b));
	}

B
Ben Laurie 已提交
1697
int ssl3_get_server_done(SSL *s)
1698 1699 1700 1701
	{
	int ok,ret=0;
	long n;

B
Ben Laurie 已提交
1702
	n=s->method->ssl_get_message(s,
1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
		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 */
1713
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1714
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1715
		return -1;
1716 1717 1718 1719 1720
		}
	ret=1;
	return(ret);
	}

1721

B
Ben Laurie 已提交
1722
int ssl3_send_client_key_exchange(SSL *s)
1723
	{
1724
	unsigned char *p,*d;
1725
	int n;
1726
	unsigned long alg_k;
1727
#ifndef OPENSSL_NO_RSA
1728
	unsigned char *q;
1729
	EVP_PKEY *pkey=NULL;
1730
#endif
1731
#ifndef OPENSSL_NO_KRB5
1732
	KSSL_ERR kssl_err;
1733
#endif /* OPENSSL_NO_KRB5 */
B
Bodo Möller 已提交
1734 1735
#ifndef OPENSSL_NO_ECDH
	EC_KEY *clnt_ecdh = NULL;
N
Nils Larsch 已提交
1736
	const EC_POINT *srvr_ecpoint = NULL;
B
Bodo Möller 已提交
1737 1738 1739 1740 1741
	EVP_PKEY *srvr_pub_pkey = NULL;
	unsigned char *encodedPoint = NULL;
	int encoded_pt_len = 0;
	BN_CTX * bn_ctx = NULL;
#endif
1742 1743 1744 1745 1746 1747

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

1748
		alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1749

1750 1751
		/* Fool emacs indentation */
		if (0) {}
1752
#ifndef OPENSSL_NO_RSA
1753
		else if (alg_k & SSL_kRSA)
1754 1755
			{
			RSA *rsa;
1756
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1757

1758 1759
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1760 1761
			else
				{
1762
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1763 1764 1765 1766
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1767
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1768 1769 1770
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1771
				EVP_PKEY_free(pkey);
1772 1773
				}
				
1774 1775
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1776
			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1777
					goto err;
1778

1779
			s->session->master_key_length=sizeof tmp_buf;
1780

1781 1782 1783 1784
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
1785
			n=RSA_public_encrypt(sizeof tmp_buf,
1786
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1787 1788 1789 1790
#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
1791 1792 1793 1794 1795 1796
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1797 1798 1799 1800 1801 1802 1803
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1804
			s->session->master_key_length=
1805
				s->method->ssl3_enc->generate_master_secret(s,
1806
					s->session->master_key,
1807
					tmp_buf,sizeof tmp_buf);
1808
			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1809
			}
1810
#endif
1811
#ifndef OPENSSL_NO_KRB5
1812
		else if (alg_k & SSL_kKRB5)
1813 1814 1815 1816 1817 1818
			{
			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;
1819 1820 1821 1822 1823 1824 1825
			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);
1826

D
 
Dr. Stephen Henson 已提交
1827 1828
			EVP_CIPHER_CTX_init(&ciph_ctx);

1829
#ifdef KSSL_DEBUG
1830
			printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
1831
				alg_k, SSL_kKRB5);
1832 1833
#endif	/* KSSL_DEBUG */

1834 1835 1836 1837 1838
			authp = NULL;
#ifdef KRB5SENDAUTH
			if (KRB5SENDAUTH)  authp = &authenticator;
#endif	/* KRB5SENDAUTH */

1839
			krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1840 1841
				&kssl_err);
			enc = kssl_map_enc(kssl_ctx->enctype);
1842 1843
			if (enc == NULL)
			    goto err;
1844
#ifdef KSSL_DEBUG
1845 1846 1847
			{
			printf("kssl_cget_tkt rtn %d\n", krb5rc);
			if (krb5rc && kssl_err.text)
1848
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1849
			}
1850 1851
#endif	/* KSSL_DEBUG */

1852 1853 1854
			if (krb5rc)
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,
1855
						SSL_AD_HANDSHAKE_FAILURE);
1856
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1857
						kssl_err.reason);
1858 1859
				goto err;
				}
1860

1861 1862 1863
			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
			**  in place of RFC 2712 KerberosWrapper, as in:
			**
1864 1865 1866 1867 1868 1869
			**  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);
			**
1870 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
			**  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;
				}
 
1904 1905 1906 1907
			    tmp_buf[0]=s->client_version>>8;
			    tmp_buf[1]=s->client_version&0xff;
			    if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
				goto err;
1908 1909

			/*  20010420 VRS.  Tried it this way; failed.
1910
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1911 1912
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1913
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1914 1915
			*/

1916
			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1917 1918
			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
				kssl_ctx->key,iv);
1919
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1920
				sizeof tmp_buf);
1921
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1922
			outl += padl;
B
Bodo Möller 已提交
1923 1924 1925 1926 1927
			if (outl > sizeof epms)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
				goto err;
				}
1928 1929 1930 1931 1932 1933 1934 1935
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

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

1936
			s->session->master_key_length=
1937
				s->method->ssl3_enc->generate_master_secret(s,
1938
					s->session->master_key,
1939
					tmp_buf, sizeof tmp_buf);
1940

1941 1942
			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
			OPENSSL_cleanse(epms, outl);
1943
			}
1944
#endif
1945
#ifndef OPENSSL_NO_DH
1946
		else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1947 1948 1949
			{
			DH *dh_srvr,*dh_clnt;

1950 1951
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1952 1953 1954
			else
				{
				/* we get them from the cert */
1955
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973
				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 */
1974

1975
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1976

1977 1978 1979 1980 1981 1982 1983 1984
			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=
1985
				s->method->ssl3_enc->generate_master_secret(s,
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
					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
2001 2002

#ifndef OPENSSL_NO_ECDH 
2003
		else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
B
Bodo Möller 已提交
2004
			{
N
Nils Larsch 已提交
2005 2006
			const EC_GROUP *srvr_group = NULL;
			EC_KEY *tkey;
B
Bodo Möller 已提交
2007
			int ecdh_clnt_cert = 0;
2008
			int field_size = 0;
B
Bodo Möller 已提交
2009 2010 2011 2012 2013 2014

			/* 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.
			 */
2015
			if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 
B
Bodo Möller 已提交
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
				{
				/* 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
2033
				 *      EVP_PKEY_EC) && ...)
B
Bodo Möller 已提交
2034 2035 2036 2037 2038 2039
				 * ecdh_clnt_cert = 1;
				 */
				}

			if (s->session->sess_cert->peer_ecdh_tmp != NULL)
				{
N
Nils Larsch 已提交
2040
				tkey = s->session->sess_cert->peer_ecdh_tmp;
B
Bodo Möller 已提交
2041 2042 2043 2044 2045 2046 2047
				}
			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) ||
2048
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
N
Nils Larsch 已提交
2049
				    (srvr_pub_pkey->pkey.ec == NULL))
B
Bodo Möller 已提交
2050 2051 2052 2053 2054 2055
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					    ERR_R_INTERNAL_ERROR);
					goto err;
					}

N
Nils Larsch 已提交
2056
				tkey = srvr_pub_pkey->pkey.ec;
B
Bodo Möller 已提交
2057 2058
				}

N
Nils Larsch 已提交
2059 2060 2061
			srvr_group   = EC_KEY_get0_group(tkey);
			srvr_ecpoint = EC_KEY_get0_public_key(tkey);

B
Bodo Möller 已提交
2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
			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
2075 2076 2077 2078 2079
			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
2080 2081
			if (ecdh_clnt_cert) 
				{ 
2082
				/* Reuse key info from our certificate
B
Bodo Möller 已提交
2083 2084 2085
				 * We only need our private key to perform
				 * the ECDH computation.
				 */
N
Nils Larsch 已提交
2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098
				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
2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109
				}
			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;
					}
				}

2110 2111
			/* use the 'p' output buffer for the ECDH key, but
			 * make sure to clear it out afterwards
B
Bodo Möller 已提交
2112 2113
			 */

N
Nils Larsch 已提交
2114
			field_size = EC_GROUP_get_degree(srvr_group);
2115 2116 2117 2118 2119 2120
			if (field_size <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_LIB);
				goto err;
				}
B
Bodo Möller 已提交
2121
			n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
B
Bodo Möller 已提交
2122
			if (n <= 0)
2123 2124
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
B
Bodo Möller 已提交
2125
				       ERR_R_ECDH_LIB);
2126
				goto err;
B
Bodo Möller 已提交
2127 2128
				}

2129 2130
			/* generate master key from the result */
			s->session->master_key_length = s->method->ssl3_enc \
B
Bodo Möller 已提交
2131 2132 2133 2134
			    -> generate_master_secret(s, 
				s->session->master_key,
				p, n);

2135
			memset(p, 0, n); /* clean up */
B
Bodo Möller 已提交
2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147

			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
2148 2149
				    EC_POINT_point2oct(srvr_group, 
					EC_KEY_get0_public_key(clnt_ecdh), 
B
Bodo Möller 已提交
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164
					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
2165 2166
				n = EC_POINT_point2oct(srvr_group, 
				    EC_KEY_get0_public_key(clnt_ecdh), 
B
Bodo Möller 已提交
2167 2168 2169 2170
				    POINT_CONVERSION_UNCOMPRESSED, 
				    encodedPoint, encoded_pt_len, bn_ctx);

				*p = n; /* length of encoded point */
2171
				/* Encoded point will be copied here */
B
Bodo Möller 已提交
2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186
				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 */
2187
#ifndef OPENSSL_NO_PSK
2188
		else if (alg_k & SSL_kPSK)
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
			{
			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);
2261
			OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2262 2263 2264 2265 2266 2267 2268
			if (psk_err != 0)
				{
				ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
				goto err;
				}
			}
#endif
2269
		else
2270
			{
B
Bodo Möller 已提交
2271 2272 2273 2274
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289
			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
2290 2291 2292 2293 2294
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
	if (clnt_ecdh != NULL) 
		EC_KEY_free(clnt_ecdh);
2295
	EVP_PKEY_free(srvr_pub_pkey);
B
Bodo Möller 已提交
2296
#endif
2297 2298 2299
	return(-1);
	}

B
Ben Laurie 已提交
2300
int ssl3_send_client_verify(SSL *s)
2301 2302 2303 2304
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
2305
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
2306
	unsigned u=0;
2307
#endif
2308
	unsigned long n;
N
make  
Nils Larsch 已提交
2309
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
2310 2311
	int j;
#endif
2312 2313 2314 2315 2316 2317 2318

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

2319 2320
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
2321

2322
#ifndef OPENSSL_NO_RSA
2323 2324
		if (pkey->type == EVP_PKEY_RSA)
			{
2325 2326
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
2327 2328
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
2329
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
2330 2331 2332 2333
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
2334 2335
			s2n(u,p);
			n=u+2;
2336 2337 2338
			}
		else
#endif
2339
#ifndef OPENSSL_NO_DSA
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353
			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
2354 2355
#endif
#ifndef OPENSSL_NO_ECDSA
2356
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
2357 2358 2359 2360
			{
			if (!ECDSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
N
Nils Larsch 已提交
2361
				(unsigned int *)&j,pkey->pkey.ec))
B
Bodo Möller 已提交
2362 2363 2364 2365 2366 2367 2368 2369 2370
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
				    ERR_R_ECDSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
2371 2372
#endif
			{
B
Bodo Möller 已提交
2373
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2374 2375 2376 2377 2378
			goto err;
			}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

2379
		s->state=SSL3_ST_CW_CERT_VRFY_B;
2380 2381 2382 2383 2384 2385 2386 2387
		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
2388
int ssl3_send_client_certificate(SSL *s)
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 2436
	{
	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)
			{
2437 2438 2439 2440 2441 2442 2443 2444 2445 2446
			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;
				}
2447 2448 2449 2450 2451 2452 2453 2454 2455
			}

		/* 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;
2456 2457
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2458 2459 2460 2461 2462 2463 2464 2465 2466
		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
2467
int ssl3_check_cert_and_algorithm(SSL *s)
2468 2469
	{
	int i,idx;
2470
	long alg_k,alg_a;
2471
	EVP_PKEY *pkey=NULL;
2472
	SESS_CERT *sc;
2473
#ifndef OPENSSL_NO_RSA
2474
	RSA *rsa;
2475
#endif
2476
#ifndef OPENSSL_NO_DH
2477
	DH *dh;
2478
#endif
2479

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

2487 2488
	alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
	alg_a=s->s3->tmp.new_cipher->algorithm_auth;
2489 2490

	/* we don't have a certificate */
2491
	if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
2492 2493
		return(1);

2494
#ifndef OPENSSL_NO_RSA
2495
	rsa=s->session->sess_cert->peer_rsa_tmp;
2496
#endif
2497
#ifndef OPENSSL_NO_DH
2498
	dh=s->session->sess_cert->peer_dh_tmp;
2499
#endif
2500 2501 2502

	/* This is the passed certificate */

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

	
	/* Check that we have a certificate if we require one */
2525
	if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
2526 2527 2528 2529
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
		goto f_err;
		}
2530
#ifndef OPENSSL_NO_DSA
2531
	else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
2532 2533 2534 2535 2536
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
		goto f_err;
		}
#endif
2537
#ifndef OPENSSL_NO_RSA
2538
	if ((alg_k & SSL_kRSA) &&
2539 2540 2541 2542 2543
		!(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;
		}
2544
#endif
2545
#ifndef OPENSSL_NO_DH
2546
	if ((alg_k & SSL_kEDH) &&
2547 2548 2549 2550 2551
		!(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;
		}
2552
	else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
2553 2554 2555 2556
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
		goto f_err;
		}
2557
#ifndef OPENSSL_NO_DSA
2558
	else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
2559 2560 2561 2562 2563 2564 2565
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
		goto f_err;
		}
#endif
#endif

2566
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2567
		{
2568
#ifndef OPENSSL_NO_RSA
2569
		if (alg_k & SSL_kRSA)
2570
			{
2571
			if (rsa == NULL
2572
			    || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2573 2574 2575 2576 2577 2578 2579
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
2580
#ifndef OPENSSL_NO_DH
2581
			if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2582 2583
			    {
			    if (dh == NULL
2584
				|| DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
				{
				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:
2599
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2600 2601 2602
err:
	return(0);
	}