s3_clnt.c 58.8 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 <openssl/dh.h>
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#include <openssl/bn.h>
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static 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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#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)
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				{
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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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int ssl3_client_hello(SSL *s)
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	{
	unsigned char *buf;
	unsigned char *p,*d;
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	int i,j;
537
	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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		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;
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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 > (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 */
		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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			j=sk_SSL_COMP_num(s->ctx->comp_methods);
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		*(p++)=1+j;
		for (i=0; i<j; i++)
			{
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			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
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			*(p++)=comp->id;
			}
		*(p++)=0; /* Add the NULL method */
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		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
626
int ssl3_get_server_hello(SSL *s)
627
	{
B
Ben Laurie 已提交
628
	STACK_OF(SSL_CIPHER) *sk;
629 630 631 632 633
	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
634
	SSL_COMP *comp;
635

B
Ben Laurie 已提交
636
	n=s->method->ssl_get_message(s,
637 638
		SSL3_ST_CR_SRVR_HELLO_A,
		SSL3_ST_CR_SRVR_HELLO_B,
B
Ben Laurie 已提交
639
		-1,
640 641 642 643
		300, /* ?? */
		&ok);

	if (!ok) return((int)n);
B
Ben Laurie 已提交
644 645 646 647 648 649 650 651 652 653 654 655 656

	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;
657
				SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
658 659 660 661 662 663 664 665
				goto f_err;
				}
			}
		}
	
	if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
		{
		al=SSL_AD_UNEXPECTED_MESSAGE;
666
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
B
Ben Laurie 已提交
667 668 669
		goto f_err;
		}

670
	d=p=(unsigned char *)s->init_msg;
671

672
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
673 674
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
675 676 677
		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
678 679 680 681 682 683 684 685 686 687 688
		}
	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++);

689
	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
690
		{
691 692 693
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
		goto f_err;
694
		}
695

B
Ben Laurie 已提交
696 697 698 699 700 701
	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))
		{
702
		/* actually a client application bug */
B
Ben Laurie 已提交
703 704 705 706 707 708
		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;
	    }
709
	else	/* a miss or crap from the other end */
710
		{
711 712
		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
713
		s->hit=0;
714 715 716 717 718 719 720 721 722 723
		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 */
724 725 726 727 728 729
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
730
		al=SSL_AD_ILLEGAL_PARAMETER;
731 732 733 734 735 736
		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
737
	i=sk_SSL_CIPHER_find(sk,c);
738 739 740
	if (i < 0)
		{
		/* we did not say we would use this cipher */
741
		al=SSL_AD_ILLEGAL_PARAMETER;
742 743 744 745
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

746 747 748 749 750
	/* 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;
751
	if (s->hit && (s->session->cipher_id != c->id))
752
		{
753
		if (!(s->options &
754 755
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
756
			al=SSL_AD_ILLEGAL_PARAMETER;
757 758 759 760 761 762 763
			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 */
764
	/* COMPRESSION */
765
	j= *(p++);
766 767 768 769 770 771
	if (j == 0)
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
772
		{
773
		al=SSL_AD_ILLEGAL_PARAMETER;
774 775 776
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
777 778 779 780
	else
		{
		s->s3->tmp.new_compression=comp;
		}
781 782 783 784

	if (p != (d+n))
		{
		/* wrong packet length */
785
		al=SSL_AD_DECODE_ERROR;
786 787 788 789 790 791 792 793 794 795 796
		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
797
int ssl3_get_server_certificate(SSL *s)
798 799 800 801
	{
	int al,i,ok,ret= -1;
	unsigned long n,nc,llen,l;
	X509 *x=NULL;
802 803
	const unsigned char *q,*p;
	unsigned char *d;
B
Ben Laurie 已提交
804
	STACK_OF(X509) *sk=NULL;
805
	SESS_CERT *sc;
806
	EVP_PKEY *pkey=NULL;
807
	int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
808

B
Ben Laurie 已提交
809
	n=s->method->ssl_get_message(s,
810 811 812
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
813
		s->max_cert_list,
814 815 816 817 818 819 820 821 822 823 824 825
		&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)
		{
826
		al=SSL_AD_UNEXPECTED_MESSAGE;
827 828 829
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
830
	p=d=(unsigned char *)s->init_msg;
831

B
Ben Laurie 已提交
832
	if ((sk=sk_X509_new_null()) == NULL)
833 834 835 836 837 838 839 840
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
841
		al=SSL_AD_DECODE_ERROR;
842 843 844 845 846 847 848 849
		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)
			{
850
			al=SSL_AD_DECODE_ERROR;
851 852 853 854 855 856 857 858
			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)
			{
859
			al=SSL_AD_BAD_CERTIFICATE;
860 861 862 863 864
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
865
			al=SSL_AD_DECODE_ERROR;
866 867 868
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
869
		if (!sk_X509_push(sk,x))
870 871 872 873 874 875 876 877 878 879
			{
			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);
880 881
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
#ifndef OPENSSL_NO_KRB5
882 883
	        && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
	        != (SSL_aKRB5|SSL_kKRB5)
884
#endif /* OPENSSL_NO_KRB5 */
885
	        )
886 887 888 889 890
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
891
	ERR_clear_error(); /* but we keep s->verify_result */
892

893 894
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
895

896 897
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
898

899
	sc->cert_chain=sk;
900 901
	/* 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
902
	x=sk_X509_value(sk,0);
903
	sk=NULL;
904
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
905 906 907

	pkey=X509_get_pubkey(x);

908 909 910 911
	/* 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;
912 913 914 915 916

#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,
917
	        s->s3->tmp.new_cipher->algorithms, need_cert);
918 919
#endif    /* KSSL_DEBUG */

920
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
921 922 923
		{
		x=NULL;
		al=SSL3_AL_FATAL;
924 925
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
926 927 928 929
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
930
	if (need_cert && i < 0)
931 932 933
		{
		x=NULL;
		al=SSL3_AL_FATAL;
934 935
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
936 937 938
		goto f_err;
		}

939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
	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;
		}
964
	s->session->verify_result = s->verify_result;
965 966 967 968 969 970 971 972 973 974

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
975 976
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
977
	sk_X509_pop_free(sk,X509_free);
978 979 980
	return(ret);
	}

B
Ben Laurie 已提交
981
int ssl3_get_key_exchange(SSL *s)
982
	{
983
#ifndef OPENSSL_NO_RSA
984 985 986 987 988 989 990
	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;
991
#ifndef OPENSSL_NO_RSA
992
	RSA *rsa=NULL;
993
#endif
994
#ifndef OPENSSL_NO_DH
995
	DH *dh=NULL;
996
#endif
B
Bodo Möller 已提交
997 998 999 1000 1001 1002 1003
#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
1004

1005 1006
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
B
Ben Laurie 已提交
1007
	n=s->method->ssl_get_message(s,
1008 1009 1010
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
1011
		s->max_cert_list,
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
		&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);
		}

1022
	param=p=(unsigned char *)s->init_msg;
1023

1024
	if (s->session->sess_cert != NULL)
1025
		{
1026
#ifndef OPENSSL_NO_RSA
1027
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
1028
			{
1029 1030
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
1031 1032
			}
#endif
1033
#ifndef OPENSSL_NO_DH
1034
		if (s->session->sess_cert->peer_dh_tmp)
1035
			{
1036 1037
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
1038
			}
B
Bodo Möller 已提交
1039 1040 1041 1042 1043 1044 1045
#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;
			}
1046 1047 1048 1049
#endif
		}
	else
		{
1050
		s->session->sess_cert=ssl_sess_cert_new();
1051 1052 1053 1054
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;
1055
	EVP_MD_CTX_init(&md_ctx);
1056

1057
#ifndef OPENSSL_NO_RSA
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
	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)
			{
1069
			al=SSL_AD_DECODE_ERROR;
1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
			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)
			{
1084
			al=SSL_AD_DECODE_ERROR;
1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
			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)
1098
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1099 1100
		else
			{
B
Bodo Möller 已提交
1101
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1102 1103
			goto err;
			}
1104
		s->session->sess_cert->peer_rsa_tmp=rsa;
1105
		rsa=NULL;
1106
		}
1107
#else /* OPENSSL_NO_RSA */
1108 1109
	if (0)
		;
1110
#endif
1111
#ifndef OPENSSL_NO_DH
1112
	else if (alg & SSL_kEDH)
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
		{
		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)
			{
1123
			al=SSL_AD_DECODE_ERROR;
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
			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)
			{
1138
			al=SSL_AD_DECODE_ERROR;
1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
			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)
			{
1153
			al=SSL_AD_DECODE_ERROR;
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164
			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;

1165
#ifndef OPENSSL_NO_RSA
1166
		if (alg & SSL_aRSA)
1167
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1168 1169 1170
#else
		if (0)
			;
1171
#endif
1172
#ifndef OPENSSL_NO_DSA
1173
		else if (alg & SSL_aDSS)
1174
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1175 1176 1177
#endif
		/* else anonymous DH, so no certificate or pkey. */

1178
		s->session->sess_cert->peer_dh_tmp=dh;
1179
		dh=NULL;
1180 1181 1182
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1183
		al=SSL_AD_ILLEGAL_PARAMETER;
1184 1185 1186
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
1187
#endif /* !OPENSSL_NO_DH */
B
Bodo Möller 已提交
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 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282

#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 */
1283 1284 1285 1286 1287 1288 1289
	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;
		}

1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302

	/* 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 */
1303
			al=SSL_AD_DECODE_ERROR;
1304
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1305
			goto f_err;
1306 1307
			}

1308
#ifndef OPENSSL_NO_RSA
1309 1310 1311 1312 1313 1314 1315 1316
		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
1317 1318
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
1319 1320 1321
				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
1322
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1323 1324 1325
				q+=i;
				j+=i;
				}
1326 1327 1328
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1329
				{
1330
				al=SSL_AD_DECRYPT_ERROR;
1331 1332 1333
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1334
			if (i == 0)
1335 1336
				{
				/* bad signature */
1337
				al=SSL_AD_DECRYPT_ERROR;
1338 1339 1340 1341 1342 1343
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
1344
#ifndef OPENSSL_NO_DSA
1345 1346 1347
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
D
 
Dr. Stephen Henson 已提交
1348
			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1349 1350 1351 1352 1353 1354
			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 */
1355
				al=SSL_AD_DECRYPT_ERROR;
1356 1357 1358 1359 1360
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
B
Bodo Möller 已提交
1361 1362
#endif
#ifndef OPENSSL_NO_ECDSA
1363
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
			{
			/* 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
1379 1380
#endif
			{
B
Bodo Möller 已提交
1381
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1382 1383 1384 1385 1386 1387 1388 1389
			goto err;
			}
		}
	else
		{
		/* still data left over */
		if (!(alg & SSL_aNULL))
			{
B
Bodo Möller 已提交
1390
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1391 1392 1393 1394
			goto err;
			}
		if (n != 0)
			{
1395
			al=SSL_AD_DECODE_ERROR;
1396 1397 1398 1399
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1400
	EVP_PKEY_free(pkey);
1401
	EVP_MD_CTX_cleanup(&md_ctx);
1402 1403 1404 1405
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1406
	EVP_PKEY_free(pkey);
1407
#ifndef OPENSSL_NO_RSA
1408 1409 1410
	if (rsa != NULL)
		RSA_free(rsa);
#endif
1411
#ifndef OPENSSL_NO_DH
1412 1413
	if (dh != NULL)
		DH_free(dh);
B
Bodo Möller 已提交
1414 1415 1416 1417 1418 1419
#endif
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	EC_POINT_free(srvr_ecpoint);
	if (ecdh != NULL)
		EC_KEY_free(ecdh);
1420
#endif
1421
	EVP_MD_CTX_cleanup(&md_ctx);
1422 1423 1424
	return(-1);
	}

B
Ben Laurie 已提交
1425
int ssl3_get_certificate_request(SSL *s)
1426 1427
	{
	int ok,ret=0;
1428 1429
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1430
	X509_NAME *xn=NULL;
1431 1432
	const unsigned char *p,*q;
	unsigned char *d;
B
Ben Laurie 已提交
1433
	STACK_OF(X509_NAME) *ca_sk=NULL;
1434

B
Ben Laurie 已提交
1435
	n=s->method->ssl_get_message(s,
1436 1437 1438
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
1439
		s->max_cert_list,
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
		&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)
		{
1454
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1455 1456 1457 1458
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470
	/* 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;
			}
		}

1471
	p=d=(unsigned char *)s->init_msg;
1472

B
Ben Laurie 已提交
1473
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
		{
		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);
1489 1490 1491 1492 1493 1494 1495 1496 1497
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1498 1499
	if ((llen+ctype_num+2+1) != n)
		{
1500
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1501 1502 1503 1504 1505 1506 1507 1508 1509
		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)
			{
1510
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1511
				goto cont; /* netscape bugs */
1512
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1513 1514 1515 1516 1517 1518 1519 1520
			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
1521
			/* If netscape tolerance is on, ignore errors */
1522
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1523 1524 1525
				goto cont;
			else
				{
1526
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1527 1528 1529 1530 1531 1532 1533
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1534
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1535 1536 1537
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1538
		if (!sk_X509_NAME_push(ca_sk,xn))
1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553
			{
			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
1554
	/* we should setup a certificate to return.... */
1555 1556 1557
	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
1558
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1559 1560 1561 1562 1563
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1564
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1565 1566 1567
	return(ret);
	}

1568
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1569 1570 1571 1572
	{
	return(X509_NAME_cmp(*a,*b));
	}

B
Ben Laurie 已提交
1573
int ssl3_get_server_done(SSL *s)
1574 1575 1576 1577
	{
	int ok,ret=0;
	long n;

B
Ben Laurie 已提交
1578
	n=s->method->ssl_get_message(s,
1579 1580 1581 1582 1583 1584 1585 1586 1587 1588
		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 */
1589
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1590
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1591
		return -1;
1592 1593 1594 1595 1596
		}
	ret=1;
	return(ret);
	}

1597 1598

static const int KDF1_SHA1_len = 20;
1599
static void *KDF1_SHA1(const void *in, size_t inlen, void *out, size_t *outlen)
1600 1601
	{
#ifndef OPENSSL_NO_SHA
1602
	if (*outlen < SHA_DIGEST_LENGTH)
1603
		return NULL;
1604 1605
	else
		*outlen = SHA_DIGEST_LENGTH;
1606 1607 1608 1609 1610 1611
	return SHA1(in, inlen, out);
#else
	return NULL;
#endif
	}

B
Ben Laurie 已提交
1612
int ssl3_send_client_key_exchange(SSL *s)
1613
	{
1614
	unsigned char *p,*d;
1615 1616
	int n;
	unsigned long l;
1617
#ifndef OPENSSL_NO_RSA
1618
	unsigned char *q;
1619
	EVP_PKEY *pkey=NULL;
1620
#endif
1621
#ifndef OPENSSL_NO_KRB5
1622
	KSSL_ERR kssl_err;
1623
#endif /* OPENSSL_NO_KRB5 */
B
Bodo Möller 已提交
1624 1625 1626 1627 1628 1629 1630 1631
#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
1632 1633 1634 1635 1636 1637 1638 1639

	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;

1640 1641
		/* Fool emacs indentation */
		if (0) {}
1642
#ifndef OPENSSL_NO_RSA
1643
		else if (l & SSL_kRSA)
1644 1645
			{
			RSA *rsa;
1646
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1647

1648 1649
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1650 1651
			else
				{
1652
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1653 1654 1655 1656
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1657
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1658 1659 1660
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1661
				EVP_PKEY_free(pkey);
1662 1663
				}
				
1664 1665
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1666
			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1667
					goto err;
1668

1669
			s->session->master_key_length=sizeof tmp_buf;
1670

1671 1672 1673 1674
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
1675
			n=RSA_public_encrypt(sizeof tmp_buf,
1676
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1677 1678 1679 1680
#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
1681 1682 1683 1684 1685 1686
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1687 1688 1689 1690 1691 1692 1693
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1694
			s->session->master_key_length=
1695
				s->method->ssl3_enc->generate_master_secret(s,
1696
					s->session->master_key,
1697
					tmp_buf,sizeof tmp_buf);
1698
			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1699
			}
1700
#endif
1701
#ifndef OPENSSL_NO_KRB5
1702
		else if (l & SSL_kKRB5)
1703 1704 1705 1706 1707 1708
			{
			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;
1709 1710 1711 1712 1713 1714 1715
			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);
1716

D
 
Dr. Stephen Henson 已提交
1717 1718
			EVP_CIPHER_CTX_init(&ciph_ctx);

1719
#ifdef KSSL_DEBUG
1720 1721
			printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
			        l, SSL_kKRB5);
1722 1723
#endif	/* KSSL_DEBUG */

1724 1725 1726 1727 1728
			authp = NULL;
#ifdef KRB5SENDAUTH
			if (KRB5SENDAUTH)  authp = &authenticator;
#endif	/* KRB5SENDAUTH */

1729
			krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
1730 1731
				&kssl_err);
			enc = kssl_map_enc(kssl_ctx->enctype);
1732 1733
			if (enc == NULL)
			    goto err;
1734
#ifdef KSSL_DEBUG
1735 1736 1737
			{
			printf("kssl_cget_tkt rtn %d\n", krb5rc);
			if (krb5rc && kssl_err.text)
1738
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1739
			}
1740 1741
#endif	/* KSSL_DEBUG */

1742 1743 1744
			if (krb5rc)
				{
				ssl3_send_alert(s,SSL3_AL_FATAL,
1745
						SSL_AD_HANDSHAKE_FAILURE);
1746
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
1747
						kssl_err.reason);
1748 1749
				goto err;
				}
1750

1751 1752 1753
			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
			**  in place of RFC 2712 KerberosWrapper, as in:
			**
1754 1755 1756 1757 1758 1759
			**  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);
			**
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
			**  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;
				}
 
1794
			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1795 1796 1797
			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.
1798
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1799 1800
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1801
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1802 1803
			*/

1804
			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1805 1806
			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
				kssl_ctx->key,iv);
1807
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1808
				sizeof tmp_buf);
1809
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1810
			outl += padl;
B
Bodo Möller 已提交
1811 1812 1813 1814 1815
			if (outl > sizeof epms)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
				goto err;
				}
1816 1817 1818 1819 1820 1821 1822 1823
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

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

1824 1825
			s->session->master_key_length=
			        s->method->ssl3_enc->generate_master_secret(s,
1826
					s->session->master_key,
1827
					tmp_buf, sizeof tmp_buf);
1828

1829 1830
			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
			OPENSSL_cleanse(epms, outl);
1831
			}
1832
#endif
1833
#ifndef OPENSSL_NO_DH
1834
		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1835 1836 1837
			{
			DH *dh_srvr,*dh_clnt;

1838 1839
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1840 1841 1842
			else
				{
				/* we get them from the cert */
1843
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
				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 */
1862

1863
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1864

1865 1866 1867 1868 1869 1870 1871 1872
			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=
1873
				s->method->ssl3_enc->generate_master_secret(s,
1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
					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
1889 1890 1891 1892 1893 1894

#ifndef OPENSSL_NO_ECDH 
		else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
			{
			EC_GROUP *srvr_group = NULL;
			int ecdh_clnt_cert = 0;
1895
			int field_size = 0;
B
Bodo Möller 已提交
1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919

			/* 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
1920
				 *      EVP_PKEY_EC) && ...)
B
Bodo Möller 已提交
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937
				 * 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) ||
1938
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
B
Bodo Möller 已提交
1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966
				    (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) 
				{ 
1967
				/* Reuse key info from our certificate
B
Bodo Möller 已提交
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983
				 * 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;
					}
				}

1984 1985
			/* use the 'p' output buffer for the ECDH key, but
			 * make sure to clear it out afterwards
B
Bodo Möller 已提交
1986 1987
			 */

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
			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
2003
			if (n <= 0)
2004 2005
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
B
Bodo Möller 已提交
2006
				       ERR_R_ECDH_LIB);
2007
				goto err;
B
Bodo Möller 已提交
2008 2009
				}

2010 2011
			/* generate master key from the result */
			s->session->master_key_length = s->method->ssl3_enc \
B
Bodo Möller 已提交
2012 2013 2014 2015
			    -> generate_master_secret(s, 
				s->session->master_key,
				p, n);

2016
			memset(p, 0, n); /* clean up */
B
Bodo Möller 已提交
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051

			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 */
2052
				/* Encoded point will be copied here */
B
Bodo Möller 已提交
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064
				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) 
				{
2065
				 /* group is shared */
B
Bodo Möller 已提交
2066 2067 2068 2069 2070 2071
				 clnt_ecdh->group = NULL; 
				 EC_KEY_free(clnt_ecdh);
				}
			EVP_PKEY_free(srvr_pub_pkey);
			}
#endif /* !OPENSSL_NO_ECDH */
2072
		else
2073
			{
B
Bodo Möller 已提交
2074 2075 2076 2077
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
			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
2093 2094 2095 2096 2097 2098 2099 2100 2101
#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);
		}
2102
	EVP_PKEY_free(srvr_pub_pkey);
B
Bodo Möller 已提交
2103
#endif
2104 2105 2106
	return(-1);
	}

B
Ben Laurie 已提交
2107
int ssl3_send_client_verify(SSL *s)
2108 2109 2110 2111
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
2112
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
2113
	unsigned u=0;
2114
#endif
2115
	unsigned long n;
2116
#ifndef OPENSSL_NO_DSA
2117 2118
	int j;
#endif
2119 2120 2121 2122 2123 2124 2125

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

2126 2127
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
2128

2129
#ifndef OPENSSL_NO_RSA
2130 2131
		if (pkey->type == EVP_PKEY_RSA)
			{
2132 2133
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
2134 2135
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
2136
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
2137 2138 2139 2140
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
2141 2142
			s2n(u,p);
			n=u+2;
2143 2144 2145
			}
		else
#endif
2146
#ifndef OPENSSL_NO_DSA
2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
			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
2161 2162
#endif
#ifndef OPENSSL_NO_ECDSA
2163
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177
			{
			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
2178 2179
#endif
			{
B
Bodo Möller 已提交
2180
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2181 2182 2183 2184 2185
			goto err;
			}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

2186
		s->state=SSL3_ST_CW_CERT_VRFY_B;
2187 2188 2189 2190 2191 2192 2193 2194
		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
2195
int ssl3_send_client_certificate(SSL *s)
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
	{
	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)
			{
2244 2245 2246 2247 2248 2249 2250 2251 2252 2253
			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;
				}
2254 2255 2256 2257 2258 2259 2260 2261 2262
			}

		/* 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;
2263 2264
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2265 2266 2267 2268 2269 2270 2271 2272 2273
		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
2274
int ssl3_check_cert_and_algorithm(SSL *s)
2275 2276 2277 2278
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
2279
	SESS_CERT *sc;
2280
#ifndef OPENSSL_NO_RSA
2281
	RSA *rsa;
2282
#endif
2283
#ifndef OPENSSL_NO_DH
2284
	DH *dh;
2285
#endif
2286

2287
	sc=s->session->sess_cert;
2288

2289
	if (sc == NULL)
2290
		{
B
Bodo Möller 已提交
2291
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2292 2293 2294 2295 2296 2297
		goto err;
		}

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

	/* we don't have a certificate */
2298
	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2299 2300
		return(1);

2301
#ifndef OPENSSL_NO_RSA
2302
	rsa=s->session->sess_cert->peer_rsa_tmp;
2303
#endif
2304
#ifndef OPENSSL_NO_DH
2305
	dh=s->session->sess_cert->peer_dh_tmp;
2306
#endif
2307 2308 2309

	/* This is the passed certificate */

2310
	idx=sc->peer_cert_type;
B
Bodo Möller 已提交
2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325
#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
2326 2327
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2328
	EVP_PKEY_free(pkey);
2329 2330 2331 2332 2333 2334 2335 2336

	
	/* 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;
		}
2337
#ifndef OPENSSL_NO_DSA
2338 2339 2340 2341 2342 2343
	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
2344
#ifndef OPENSSL_NO_RSA
2345 2346 2347 2348 2349 2350
	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;
		}
2351
#endif
2352
#ifndef OPENSSL_NO_DH
2353
	if ((algs & SSL_kEDH) &&
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363
		!(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;
		}
2364
#ifndef OPENSSL_NO_DSA
2365 2366 2367 2368 2369 2370 2371 2372
	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

2373
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2374
		{
2375
#ifndef OPENSSL_NO_RSA
2376 2377
		if (algs & SSL_kRSA)
			{
2378
			if (rsa == NULL
2379
			    || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2380 2381 2382 2383 2384 2385 2386
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
2387
#ifndef OPENSSL_NO_DH
2388
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2389 2390
			    {
			    if (dh == NULL
2391
				|| DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405
				{
				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:
2406
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2407 2408 2409 2410
err:
	return(0);
	}

B
Bodo Möller 已提交
2411 2412 2413 2414 2415

#ifndef OPENSSL_NO_ECDH
/* This is the complement of nid2curve_id in s3_srvr.c. */
static int curve_id2nid(int curve_id)
{
2416 2417
	/* 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
2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452
	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