s3_clnt.c 58.6 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) 1998-2003 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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#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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#include "cryptlib.h"
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static SSL_METHOD *ssl3_get_client_method(int ver);
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static int ssl3_client_hello(SSL *s);
static int ssl3_get_server_hello(SSL *s);
static int ssl3_get_certificate_request(SSL *s);
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static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
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static int ssl3_get_server_done(SSL *s);
static int ssl3_send_client_verify(SSL *s);
static int ssl3_send_client_certificate(SSL *s);
static int ssl3_send_client_key_exchange(SSL *s);
static int ssl3_get_key_exchange(SSL *s);
static int ssl3_get_server_certificate(SSL *s);
static int ssl3_check_cert_and_algorithm(SSL *s);
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#ifndef OPENSSL_NO_ECDH
static int curve_id2nid(int curve_id);
int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs);
#endif

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static SSL_METHOD *ssl3_get_client_method(int ver)
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	{
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	if (ver == SSL3_VERSION)
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		return(SSLv3_client_method());
	else
		return(NULL);
	}

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SSL_METHOD *SSLv3_client_method(void)
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	{
	static int init=1;
	static SSL_METHOD SSLv3_client_data;

	if (init)
		{
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		CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);

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		if (init)
			{
			memcpy((char *)&SSLv3_client_data,(char *)sslv3_base_method(),
				sizeof(SSL_METHOD));
			SSLv3_client_data.ssl_connect=ssl3_connect;
			SSLv3_client_data.get_ssl_method=ssl3_get_client_method;
			init=0;
			}
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		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
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		}
	return(&SSLv3_client_data);
	}

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int ssl3_connect(SSL *s)
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	{
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	BUF_MEM *buf=NULL;
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	unsigned long Time=time(NULL),l;
	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);

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			if ((s->version & 0xff00 ) != 0x0300)
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				{
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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;
			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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			if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
				{
				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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			if (s->s3->tmp.new_compression == NULL)
				s->session->compress_meth=0;
			else
				s->session->compress_meth=
					s->s3->tmp.new_compression->id;
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			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);

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			if (s->init_buf != NULL)
478
				{
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				BUF_MEM_free(s->init_buf);
				s->init_buf=NULL;
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				}
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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:
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	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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static int ssl3_client_hello(SSL *s)
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	{
	unsigned char *buf;
	unsigned char *p,*d;
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	int i,j;
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	unsigned long Time,l;
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	SSL_COMP *comp;
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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;
		Time=time(NULL);			/* Time */
		l2n(Time,p);
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		RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time));
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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;
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		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)
			{
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			if (i > sizeof s->session->session_id)
				{
				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 */
		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
		if (i == 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
			goto err;
			}
		s2n(i,p);
		p+=i;

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		/* COMPRESSION */
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		if (s->ctx->comp_methods == NULL)
			j=0;
		else
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608
			j=sk_SSL_COMP_num(s->ctx->comp_methods);
609 610 611
		*(p++)=1+j;
		for (i=0; i<j; i++)
			{
B
Ben Laurie 已提交
612
			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
613 614 615
			*(p++)=comp->id;
			}
		*(p++)=0; /* Add the NULL method */
616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633
		
		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);
	}

U
Ulf Möller 已提交
634
static int ssl3_get_server_hello(SSL *s)
635
	{
B
Ben Laurie 已提交
636
	STACK_OF(SSL_CIPHER) *sk;
637 638 639 640 641
	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
642
	SSL_COMP *comp;
643 644 645 646 647 648 649 650 651

	n=ssl3_get_message(s,
		SSL3_ST_CR_SRVR_HELLO_A,
		SSL3_ST_CR_SRVR_HELLO_B,
		SSL3_MT_SERVER_HELLO,
		300, /* ?? */
		&ok);

	if (!ok) return((int)n);
652
	d=p=(unsigned char *)s->init_msg;
653

654
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
655 656
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
657 658 659
		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
660 661 662 663 664 665 666 667 668 669 670
		}
	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++);

671
	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
672
		{
673 674 675
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
		goto f_err;
676
		}
677

B
Ben Laurie 已提交
678 679 680 681 682 683
	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))
		{
684
		/* actually a client application bug */
B
Ben Laurie 已提交
685 686 687 688 689 690
		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;
	    }
691
	else	/* a miss or crap from the other end */
692
		{
693 694
		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
695
		s->hit=0;
696 697 698 699 700 701 702 703 704 705
		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 */
706 707 708 709 710 711
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
712
		al=SSL_AD_ILLEGAL_PARAMETER;
713 714 715 716 717 718
		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
719
	i=sk_SSL_CIPHER_find(sk,c);
720 721 722
	if (i < 0)
		{
		/* we did not say we would use this cipher */
723
		al=SSL_AD_ILLEGAL_PARAMETER;
724 725 726 727
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

728 729 730 731 732
	/* 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;
733
	if (s->hit && (s->session->cipher_id != c->id))
734
		{
735
		if (!(s->options &
736 737
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
738
			al=SSL_AD_ILLEGAL_PARAMETER;
739 740 741 742 743 744 745
			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 */
746
	/* COMPRESSION */
747
	j= *(p++);
748 749 750 751 752 753
	if (j == 0)
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
754
		{
755
		al=SSL_AD_ILLEGAL_PARAMETER;
756 757 758
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
759 760 761 762
	else
		{
		s->s3->tmp.new_compression=comp;
		}
763 764 765 766

	if (p != (d+n))
		{
		/* wrong packet length */
767
		al=SSL_AD_DECODE_ERROR;
768 769 770 771 772 773 774 775 776 777 778
		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);
	}

U
Ulf Möller 已提交
779
static int ssl3_get_server_certificate(SSL *s)
780 781 782 783 784
	{
	int al,i,ok,ret= -1;
	unsigned long n,nc,llen,l;
	X509 *x=NULL;
	unsigned char *p,*d,*q;
B
Ben Laurie 已提交
785
	STACK_OF(X509) *sk=NULL;
786
	SESS_CERT *sc;
787
	EVP_PKEY *pkey=NULL;
788
	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
789 790 791 792 793

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
794
		s->max_cert_list,
795 796 797 798 799 800 801 802 803 804 805 806
		&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)
		{
807
		al=SSL_AD_UNEXPECTED_MESSAGE;
808 809 810
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
811
	d=p=(unsigned char *)s->init_msg;
812

B
Ben Laurie 已提交
813
	if ((sk=sk_X509_new_null()) == NULL)
814 815 816 817 818 819 820 821
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
822
		al=SSL_AD_DECODE_ERROR;
823 824 825 826 827 828 829 830
		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)
			{
831
			al=SSL_AD_DECODE_ERROR;
832 833 834 835 836 837 838 839
			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)
			{
840
			al=SSL_AD_BAD_CERTIFICATE;
841 842 843 844 845
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
846
			al=SSL_AD_DECODE_ERROR;
847 848 849
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
850
		if (!sk_X509_push(sk,x))
851 852 853 854 855 856 857 858 859 860
			{
			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);
861 862
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
#ifndef OPENSSL_NO_KRB5
863 864
	        && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
	        != (SSL_aKRB5|SSL_kKRB5)
865
#endif /* OPENSSL_NO_KRB5 */
866
	        )
867 868 869 870 871
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
872
	ERR_clear_error(); /* but we keep s->verify_result */
873

874 875
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
876

877 878
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
879

880
	sc->cert_chain=sk;
881 882
	/* 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
883
	x=sk_X509_value(sk,0);
884
	sk=NULL;
885
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
886 887 888

	pkey=X509_get_pubkey(x);

889 890 891 892
	/* 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;
893 894 895 896 897

#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,
898
	        s->s3->tmp.new_cipher->algorithms, need_cert);
899 900
#endif    /* KSSL_DEBUG */

901
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
902 903 904
		{
		x=NULL;
		al=SSL3_AL_FATAL;
905 906
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
907 908 909 910
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
911
	if (need_cert && i < 0)
912 913 914
		{
		x=NULL;
		al=SSL3_AL_FATAL;
915 916
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
917 918 919
		goto f_err;
		}

920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944
	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;
		}
945
	s->session->verify_result = s->verify_result;
946 947 948 949 950 951 952 953 954 955

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
956 957
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
958
	sk_X509_pop_free(sk,X509_free);
959 960 961
	return(ret);
	}

U
Ulf Möller 已提交
962
static int ssl3_get_key_exchange(SSL *s)
963
	{
964
#ifndef OPENSSL_NO_RSA
965 966 967 968 969 970 971
	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;
972
#ifndef OPENSSL_NO_RSA
973
	RSA *rsa=NULL;
974
#endif
975
#ifndef OPENSSL_NO_DH
976
	DH *dh=NULL;
977
#endif
B
Bodo Möller 已提交
978 979 980 981 982 983 984
#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
985

986 987
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
988 989 990 991
	n=ssl3_get_message(s,
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
992
		s->max_cert_list,
993 994 995 996 997 998 999 1000 1001 1002
		&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);
		}

1003
	param=p=(unsigned char *)s->init_msg;
1004

1005
	if (s->session->sess_cert != NULL)
1006
		{
1007
#ifndef OPENSSL_NO_RSA
1008
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
1009
			{
1010 1011
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
1012 1013
			}
#endif
1014
#ifndef OPENSSL_NO_DH
1015
		if (s->session->sess_cert->peer_dh_tmp)
1016
			{
1017 1018
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
1019
			}
B
Bodo Möller 已提交
1020 1021 1022 1023 1024 1025 1026
#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;
			}
1027 1028 1029 1030
#endif
		}
	else
		{
1031
		s->session->sess_cert=ssl_sess_cert_new();
1032 1033 1034 1035
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;
1036
	EVP_MD_CTX_init(&md_ctx);
1037

1038
#ifndef OPENSSL_NO_RSA
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049
	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)
			{
1050
			al=SSL_AD_DECODE_ERROR;
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
			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)
			{
1065
			al=SSL_AD_DECODE_ERROR;
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
			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)
1079
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1080 1081
		else
			{
B
Bodo Möller 已提交
1082
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1083 1084
			goto err;
			}
1085
		s->session->sess_cert->peer_rsa_tmp=rsa;
1086
		rsa=NULL;
1087
		}
1088
#else /* OPENSSL_NO_RSA */
1089 1090
	if (0)
		;
1091
#endif
1092
#ifndef OPENSSL_NO_DH
1093
	else if (alg & SSL_kEDH)
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
		{
		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)
			{
1104
			al=SSL_AD_DECODE_ERROR;
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
			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)
			{
1119
			al=SSL_AD_DECODE_ERROR;
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
			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)
			{
1134
			al=SSL_AD_DECODE_ERROR;
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
			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;

1146
#ifndef OPENSSL_NO_RSA
1147
		if (alg & SSL_aRSA)
1148
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1149 1150 1151
#else
		if (0)
			;
1152
#endif
1153
#ifndef OPENSSL_NO_DSA
1154
		else if (alg & SSL_aDSS)
1155
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1156 1157 1158
#endif
		/* else anonymous DH, so no certificate or pkey. */

1159
		s->session->sess_cert->peer_dh_tmp=dh;
1160
		dh=NULL;
1161 1162 1163
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1164
		al=SSL_AD_ILLEGAL_PARAMETER;
1165 1166 1167
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
1168
#endif /* !OPENSSL_NO_DH */
B
Bodo Möller 已提交
1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263

#ifndef OPENSSL_NO_ECDH
	else if (alg & SSL_kECDHE)
		{
		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
		 * and the ECParameters in this case is just two bytes.
		 */
		param_len=2;
		if ((param_len > n) ||
		    (*p != NAMED_CURVE_TYPE) || 
		    ((curve_nid = curve_id2nid(*(p + 1))) == 0)) 
			{
			al=SSL_AD_INTERNAL_ERROR;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
			goto f_err;
			}

		if (!(ecdh->group=EC_GROUP_new_by_nid(curve_nid)))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
			goto err;
			}

		if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
		    (EC_GROUP_get_degree(ecdh->group) > 163))
			{
			al=SSL_AD_EXPORT_RESTRICTION;
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
			goto f_err;
			}

		p+=2;

		/* Next, get the encoded ECPoint */
		if (((srvr_ecpoint = EC_POINT_new(ecdh->group)) == NULL) ||
		    ((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) ||
		    (EC_POINT_oct2point(ecdh->group, srvr_ecpoint, 
			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. */
		ecdh->pub_key = srvr_ecpoint;
		s->session->sess_cert->peer_ecdh_tmp=ecdh;
		ecdh=NULL;
		BN_CTX_free(bn_ctx);
		srvr_ecpoint = NULL;
		}
	else if (alg & SSL_kECDH)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
		goto f_err;
		}
#endif /* !OPENSSL_NO_ECDH */
1264 1265 1266 1267 1268 1269 1270
	if (alg & SSL_aFZA)
		{
		al=SSL_AD_HANDSHAKE_FAILURE;
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}

1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283

	/* 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 */
1284
			al=SSL_AD_DECODE_ERROR;
1285
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1286
			goto f_err;
1287 1288
			}

1289
#ifndef OPENSSL_NO_RSA
1290 1291 1292 1293 1294 1295 1296 1297
		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
1298 1299
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
1300 1301 1302
				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
1303
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1304 1305 1306
				q+=i;
				j+=i;
				}
1307 1308 1309
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1310
				{
1311
				al=SSL_AD_DECRYPT_ERROR;
1312 1313 1314
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1315
			if (i == 0)
1316 1317
				{
				/* bad signature */
1318
				al=SSL_AD_DECRYPT_ERROR;
1319 1320 1321 1322 1323 1324
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
1325
#ifndef OPENSSL_NO_DSA
1326 1327 1328
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
D
 
Dr. Stephen Henson 已提交
1329
			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1330 1331 1332 1333 1334 1335
			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 */
1336
				al=SSL_AD_DECRYPT_ERROR;
1337 1338 1339 1340 1341
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
B
Bodo Möller 已提交
1342 1343
#endif
#ifndef OPENSSL_NO_ECDSA
1344
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359
			{
			/* 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
1360 1361
#endif
			{
B
Bodo Möller 已提交
1362
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1363 1364 1365 1366 1367 1368 1369 1370
			goto err;
			}
		}
	else
		{
		/* still data left over */
		if (!(alg & SSL_aNULL))
			{
B
Bodo Möller 已提交
1371
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1372 1373 1374 1375
			goto err;
			}
		if (n != 0)
			{
1376
			al=SSL_AD_DECODE_ERROR;
1377 1378 1379 1380
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1381
	EVP_PKEY_free(pkey);
1382
	EVP_MD_CTX_cleanup(&md_ctx);
1383 1384 1385 1386
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1387
	EVP_PKEY_free(pkey);
1388
#ifndef OPENSSL_NO_RSA
1389 1390 1391
	if (rsa != NULL)
		RSA_free(rsa);
#endif
1392
#ifndef OPENSSL_NO_DH
1393 1394
	if (dh != NULL)
		DH_free(dh);
B
Bodo Möller 已提交
1395 1396 1397 1398 1399 1400
#endif
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	EC_POINT_free(srvr_ecpoint);
	if (ecdh != NULL)
		EC_KEY_free(ecdh);
1401
#endif
1402
	EVP_MD_CTX_cleanup(&md_ctx);
1403 1404 1405
	return(-1);
	}

U
Ulf Möller 已提交
1406
static int ssl3_get_certificate_request(SSL *s)
1407 1408
	{
	int ok,ret=0;
1409 1410
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1411 1412
	X509_NAME *xn=NULL;
	unsigned char *p,*d,*q;
B
Ben Laurie 已提交
1413
	STACK_OF(X509_NAME) *ca_sk=NULL;
1414 1415 1416 1417 1418

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
1419
		s->max_cert_list,
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433
		&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)
		{
1434
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1435 1436 1437 1438
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450
	/* 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;
			}
		}

1451
	d=p=(unsigned char *)s->init_msg;
1452

B
Ben Laurie 已提交
1453
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468
		{
		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);
1469 1470 1471 1472 1473 1474 1475 1476 1477
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1478 1479
	if ((llen+ctype_num+2+1) != n)
		{
1480
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1481 1482 1483 1484 1485 1486 1487 1488 1489
		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)
			{
1490
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1491
				goto cont; /* netscape bugs */
1492
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1493 1494 1495 1496 1497 1498 1499 1500
			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
1501
			/* If netscape tolerance is on, ignore errors */
1502
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1503 1504 1505
				goto cont;
			else
				{
1506
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1507 1508 1509 1510 1511 1512 1513
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1514
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1515 1516 1517
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1518
		if (!sk_X509_NAME_push(ca_sk,xn))
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
			{
			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
1534
	/* we should setup a certificate to return.... */
1535 1536 1537
	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
1538
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1539 1540 1541 1542 1543
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1544
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1545 1546 1547
	return(ret);
	}

1548
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1549 1550 1551 1552
	{
	return(X509_NAME_cmp(*a,*b));
	}

U
Ulf Möller 已提交
1553
static int ssl3_get_server_done(SSL *s)
1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
	{
	int ok,ret=0;
	long n;

	n=ssl3_get_message(s,
		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 */
1569
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1570
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1571
		return -1;
1572 1573 1574 1575 1576
		}
	ret=1;
	return(ret);
	}

1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589

static const int KDF1_SHA1_len = 20;
static void *KDF1_SHA1(void *in, size_t inlen, void *out, size_t outlen)
	{
#ifndef OPENSSL_NO_SHA
	if (outlen != SHA_DIGEST_LENGTH)
		return NULL;
	return SHA1(in, inlen, out);
#else
	return NULL;
#endif
	}

U
Ulf Möller 已提交
1590
static int ssl3_send_client_key_exchange(SSL *s)
1591
	{
1592
	unsigned char *p,*d;
1593 1594
	int n;
	unsigned long l;
1595
#ifndef OPENSSL_NO_RSA
1596
	unsigned char *q;
1597
	EVP_PKEY *pkey=NULL;
1598
#endif
1599
#ifndef OPENSSL_NO_KRB5
1600
	KSSL_ERR kssl_err;
1601
#endif /* OPENSSL_NO_KRB5 */
B
Bodo Möller 已提交
1602 1603 1604 1605 1606 1607 1608 1609
#ifndef OPENSSL_NO_ECDH
	EC_KEY *clnt_ecdh = NULL;
	EC_POINT *srvr_ecpoint = NULL;
	EVP_PKEY *srvr_pub_pkey = NULL;
	unsigned char *encodedPoint = NULL;
	int encoded_pt_len = 0;
	BN_CTX * bn_ctx = NULL;
#endif
1610 1611 1612 1613 1614 1615 1616 1617

	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;

1618 1619
		/* Fool emacs indentation */
		if (0) {}
1620
#ifndef OPENSSL_NO_RSA
1621
		else if (l & SSL_kRSA)
1622 1623
			{
			RSA *rsa;
1624
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1625

1626 1627
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1628 1629
			else
				{
1630
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1631 1632 1633 1634
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1635
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1636 1637 1638
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1639
				EVP_PKEY_free(pkey);
1640 1641
				}
				
1642 1643
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1644
			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1645
					goto err;
1646

1647
			s->session->master_key_length=sizeof tmp_buf;
1648

1649 1650 1651 1652
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
1653
			n=RSA_public_encrypt(sizeof tmp_buf,
1654
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1655 1656 1657 1658
#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
1659 1660 1661 1662 1663 1664
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1665 1666 1667 1668 1669 1670 1671
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1672
			s->session->master_key_length=
1673
				s->method->ssl3_enc->generate_master_secret(s,
1674
					s->session->master_key,
1675
					tmp_buf,sizeof tmp_buf);
1676
			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1677
			}
1678
#endif
1679
#ifndef OPENSSL_NO_KRB5
1680
		else if (l & SSL_kKRB5)
1681 1682 1683 1684 1685 1686
			{
			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;
1687 1688 1689 1690 1691 1692 1693
			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);
1694

D
 
Dr. Stephen Henson 已提交
1695 1696
			EVP_CIPHER_CTX_init(&ciph_ctx);

1697
#ifdef KSSL_DEBUG
1698 1699
			printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
			        l, SSL_kKRB5);
1700 1701
#endif	/* KSSL_DEBUG */

1702 1703 1704 1705 1706
			authp = NULL;
#ifdef KRB5SENDAUTH
			if (KRB5SENDAUTH)  authp = &authenticator;
#endif	/* KRB5SENDAUTH */

1707
			krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1708 1709
				&kssl_err);
			enc = kssl_map_enc(kssl_ctx->enctype);
1710 1711
			if (enc == NULL)
			    goto err;
1712
#ifdef KSSL_DEBUG
1713 1714 1715
			{
			printf("kssl_cget_tkt rtn %d\n", krb5rc);
			if (krb5rc && kssl_err.text)
1716
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1717
			}
1718 1719
#endif	/* KSSL_DEBUG */

1720 1721 1722
			if (krb5rc)
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,
1723
						SSL_AD_HANDSHAKE_FAILURE);
1724
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1725
						kssl_err.reason);
1726 1727
				goto err;
				}
1728

1729 1730 1731
			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
			**  in place of RFC 2712 KerberosWrapper, as in:
			**
1732 1733 1734 1735 1736 1737
			**  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);
			**
1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771
			**  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;
				}
 
1772
			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1773 1774 1775
			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.
1776
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1777 1778
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1779
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1780 1781
			*/

1782
			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1783 1784
			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
				kssl_ctx->key,iv);
1785
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1786
				sizeof tmp_buf);
1787
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1788
			outl += padl;
B
Bodo Möller 已提交
1789 1790 1791 1792 1793
			if (outl > sizeof epms)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
				goto err;
				}
1794 1795 1796 1797 1798 1799 1800 1801
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

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

1802 1803
			s->session->master_key_length=
			        s->method->ssl3_enc->generate_master_secret(s,
1804
					s->session->master_key,
1805
					tmp_buf, sizeof tmp_buf);
1806

1807 1808
			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
			OPENSSL_cleanse(epms, outl);
1809
			}
1810
#endif
1811
#ifndef OPENSSL_NO_DH
1812
		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1813 1814 1815
			{
			DH *dh_srvr,*dh_clnt;

1816 1817
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1818 1819 1820
			else
				{
				/* we get them from the cert */
1821
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839
				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 */
1840

1841
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1842

1843 1844 1845 1846 1847 1848 1849 1850
			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=
1851
				s->method->ssl3_enc->generate_master_secret(s,
1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
					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
1867 1868 1869 1870 1871 1872

#ifndef OPENSSL_NO_ECDH 
		else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
			{
			EC_GROUP *srvr_group = NULL;
			int ecdh_clnt_cert = 0;
1873
			int field_size = 0;
B
Bodo Möller 已提交
1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897

			/* 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
1898
				 *      EVP_PKEY_EC) && ...)
B
Bodo Möller 已提交
1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
				 * ecdh_clnt_cert = 1;
				 */
				}

			if (s->session->sess_cert->peer_ecdh_tmp != NULL)
				{
				srvr_group = s->session->sess_cert-> \
				    peer_ecdh_tmp->group;
				srvr_ecpoint = s->session->sess_cert-> \
				    peer_ecdh_tmp->pub_key;
				}
			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) ||
1916
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
B
Bodo Möller 已提交
1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944
				    (srvr_pub_pkey->pkey.eckey == NULL))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
					    ERR_R_INTERNAL_ERROR);
					goto err;
					}

				srvr_group = srvr_pub_pkey->pkey.eckey->group;
				srvr_ecpoint = 
				    srvr_pub_pkey->pkey.eckey->pub_key;
				}

			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;
				}

			clnt_ecdh->group = srvr_group;
			if (ecdh_clnt_cert) 
				{ 
1945
				/* Reuse key info from our certificate
B
Bodo Möller 已提交
1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961
				 * We only need our private key to perform
				 * the ECDH computation.
				 */
				clnt_ecdh->priv_key = BN_dup(s->cert->key-> \
				    privatekey->pkey.eckey->priv_key);
				}
			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;
					}
				}

1962 1963
			/* use the 'p' output buffer for the ECDH key, but
			 * make sure to clear it out afterwards
B
Bodo Möller 已提交
1964 1965
			 */

1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980
			field_size = EC_GROUP_get_degree(clnt_ecdh->group);
			if (field_size <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_LIB);
				goto err;
				}
			/* If field size is not more than 24 octets, then use SHA-1 hash of result;
			 * otherwise, use result (see section 4.8 of draft-ietf-tls-ecc-03.txt;
			 * this is new with this version of the Internet Draft).
			 */
			if (field_size <= 24 * 8)
				n=ECDH_compute_key(p, KDF1_SHA1_len, srvr_ecpoint, clnt_ecdh, KDF1_SHA1);
			else
				n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
B
Bodo Möller 已提交
1981
			if (n <= 0)
1982 1983
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
B
Bodo Möller 已提交
1984
				       ERR_R_ECDH_LIB);
1985
				goto err;
B
Bodo Möller 已提交
1986 1987
				}

1988 1989
			/* generate master key from the result */
			s->session->master_key_length = s->method->ssl3_enc \
B
Bodo Möller 已提交
1990 1991 1992 1993
			    -> generate_master_secret(s, 
				s->session->master_key,
				p, n);

1994
			memset(p, 0, n); /* clean up */
B
Bodo Möller 已提交
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029

			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 = 
				    EC_POINT_point2oct(clnt_ecdh->group, 
					clnt_ecdh->pub_key, 
					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 = EC_POINT_point2oct(clnt_ecdh->group, 
				    clnt_ecdh->pub_key, 
				    POINT_CONVERSION_UNCOMPRESSED, 
				    encodedPoint, encoded_pt_len, bn_ctx);

				*p = n; /* length of encoded point */
2030
				/* Encoded point will be copied here */
B
Bodo Möller 已提交
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042
				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) 
				{
2043
				 /* group is shared */
B
Bodo Möller 已提交
2044 2045 2046 2047 2048 2049
				 clnt_ecdh->group = NULL; 
				 EC_KEY_free(clnt_ecdh);
				}
			EVP_PKEY_free(srvr_pub_pkey);
			}
#endif /* !OPENSSL_NO_ECDH */
2050
		else
2051
			{
B
Bodo Möller 已提交
2052 2053 2054 2055
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
			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
2071 2072 2073 2074 2075 2076 2077 2078 2079
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
	if (clnt_ecdh != NULL) 
		{
		/* group is shared */
		clnt_ecdh->group = NULL; 
		EC_KEY_free(clnt_ecdh);
		}
2080
	EVP_PKEY_free(srvr_pub_pkey);
B
Bodo Möller 已提交
2081
#endif
2082 2083 2084
	return(-1);
	}

U
Ulf Möller 已提交
2085
static int ssl3_send_client_verify(SSL *s)
2086 2087 2088 2089
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
2090
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
2091
	unsigned u=0;
2092
#endif
2093
	unsigned long n;
2094
#ifndef OPENSSL_NO_DSA
2095 2096
	int j;
#endif
2097 2098 2099 2100 2101 2102 2103

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

2104 2105
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
2106

2107
#ifndef OPENSSL_NO_RSA
2108 2109
		if (pkey->type == EVP_PKEY_RSA)
			{
2110 2111
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
2112 2113
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
2114
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
2115 2116 2117 2118
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
2119 2120
			s2n(u,p);
			n=u+2;
2121 2122 2123
			}
		else
#endif
2124
#ifndef OPENSSL_NO_DSA
2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
			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
2139 2140
#endif
#ifndef OPENSSL_NO_ECDSA
2141
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
			{
			if (!ECDSA_sign(pkey->save_type,
				&(data[MD5_DIGEST_LENGTH]),
				SHA_DIGEST_LENGTH,&(p[2]),
				(unsigned int *)&j,pkey->pkey.eckey))
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
				    ERR_R_ECDSA_LIB);
				goto err;
				}
			s2n(j,p);
			n=j+2;
			}
		else
2156 2157
#endif
			{
B
Bodo Möller 已提交
2158
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2159 2160 2161 2162 2163
			goto err;
			}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

2164
		s->state=SSL3_ST_CW_CERT_VRFY_B;
2165 2166 2167 2168 2169 2170 2171 2172
		s->init_num=(int)n+4;
		s->init_off=0;
		}
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	return(-1);
	}

U
Ulf Möller 已提交
2173
static int ssl3_send_client_certificate(SSL *s)
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 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
	{
	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)
			{
2222 2223 2224 2225 2226 2227 2228 2229 2230 2231
			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;
				}
2232 2233 2234 2235 2236 2237 2238 2239 2240
			}

		/* 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;
2241 2242
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2243 2244 2245 2246 2247 2248 2249 2250 2251
		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))

U
Ulf Möller 已提交
2252
static int ssl3_check_cert_and_algorithm(SSL *s)
2253 2254 2255 2256
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
2257
	SESS_CERT *sc;
2258
#ifndef OPENSSL_NO_RSA
2259
	RSA *rsa;
2260
#endif
2261
#ifndef OPENSSL_NO_DH
2262
	DH *dh;
2263
#endif
2264

2265
	sc=s->session->sess_cert;
2266

2267
	if (sc == NULL)
2268
		{
B
Bodo Möller 已提交
2269
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2270 2271 2272 2273 2274 2275
		goto err;
		}

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

	/* we don't have a certificate */
2276
	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2277 2278
		return(1);

2279
#ifndef OPENSSL_NO_RSA
2280
	rsa=s->session->sess_cert->peer_rsa_tmp;
2281
#endif
2282
#ifndef OPENSSL_NO_DH
2283
	dh=s->session->sess_cert->peer_dh_tmp;
2284
#endif
2285 2286 2287

	/* This is the passed certificate */

2288
	idx=sc->peer_cert_type;
B
Bodo Möller 已提交
2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
#ifndef OPENSSL_NO_ECDH
	if (idx == SSL_PKEY_ECC)
		{
		if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
		    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
2304 2305
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2306
	EVP_PKEY_free(pkey);
2307 2308 2309 2310 2311 2312 2313 2314

	
	/* 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;
		}
2315
#ifndef OPENSSL_NO_DSA
2316 2317 2318 2319 2320 2321
	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
2322
#ifndef OPENSSL_NO_RSA
2323 2324 2325 2326 2327 2328
	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;
		}
2329
#endif
2330
#ifndef OPENSSL_NO_DH
2331
	if ((algs & SSL_kEDH) &&
2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
		!(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;
		}
2342
#ifndef OPENSSL_NO_DSA
2343 2344 2345 2346 2347 2348 2349 2350
	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

2351
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2352
		{
2353
#ifndef OPENSSL_NO_RSA
2354 2355
		if (algs & SSL_kRSA)
			{
2356
			if (rsa == NULL
2357
			    || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2358 2359 2360 2361 2362 2363 2364
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
2365
#ifndef OPENSSL_NO_DH
2366
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2367 2368
			    {
			    if (dh == NULL
2369
				|| DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383
				{
				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:
2384
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2385 2386 2387 2388
err:
	return(0);
	}

B
Bodo Möller 已提交
2389 2390 2391 2392 2393

#ifndef OPENSSL_NO_ECDH
/* This is the complement of nid2curve_id in s3_srvr.c. */
static int curve_id2nid(int curve_id)
{
2394 2395
	/* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
	 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
B
Bodo Möller 已提交
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
	static int nid_list[26] =
	{
		0,
		NID_sect163k1, /* sect163k1 (1) */
		NID_sect163r1, /* sect163r1 (2) */
		NID_sect163r2, /* sect163r2 (3) */
		NID_sect193r1, /* sect193r1 (4) */ 
		NID_sect193r2, /* sect193r2 (5) */ 
		NID_sect233k1, /* sect233k1 (6) */
		NID_sect233r1, /* sect233r1 (7) */ 
		NID_sect239k1, /* sect239k1 (8) */ 
		NID_sect283k1, /* sect283k1 (9) */
		NID_sect283r1, /* sect283r1 (10) */ 
		NID_sect409k1, /* sect409k1 (11) */ 
		NID_sect409r1, /* sect409r1 (12) */
		NID_sect571k1, /* sect571k1 (13) */ 
		NID_sect571r1, /* sect571r1 (14) */ 
		NID_secp160k1, /* secp160k1 (15) */
		NID_secp160r1, /* secp160r1 (16) */ 
		NID_secp160r2, /* secp160r2 (17) */ 
		NID_secp192k1, /* secp192k1 (18) */
		NID_X9_62_prime192v1, /* secp192r1 (19) */ 
		NID_secp224k1, /* secp224k1 (20) */ 
		NID_secp224r1, /* secp224r1 (21) */
		NID_secp256k1, /* secp256k1 (22) */ 
		NID_X9_62_prime256v1, /* secp256r1 (23) */ 
		NID_secp384r1, /* secp384r1 (24) */
		NID_secp521r1  /* secp521r1 (25) */	
	};
	
	if ((curve_id < 1) || (curve_id > 25)) return 0;

	return nid_list[curve_id];
}
#endif