s3_clnt.c 59.0 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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/* ====================================================================
 * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
 *
 * 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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	{
	BUF_MEM *buf;
	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;
				}

			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)
477
				{
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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 (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;
542
	int i,j;
543
	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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			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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609
			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
610 611 612
			*(p++)=comp->id;
			}
		*(p++)=0; /* Add the NULL method */
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630
		
		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
631
static int ssl3_get_server_hello(SSL *s)
632
	{
B
Ben Laurie 已提交
633
	STACK_OF(SSL_CIPHER) *sk;
634 635 636 637 638
	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
639
	SSL_COMP *comp;
640 641 642 643 644 645 646 647 648

	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);
649
	d=p=(unsigned char *)s->init_msg;
650

651
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
652 653
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
654 655 656
		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
657 658 659 660 661 662 663 664 665 666 667
		}
	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++);

668
	if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
669
		{
670 671 672
		al=SSL_AD_ILLEGAL_PARAMETER;
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
		goto f_err;
673
		}
674

B
Ben Laurie 已提交
675 676 677 678 679 680
	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))
		{
681
		/* actually a client application bug */
B
Ben Laurie 已提交
682 683 684 685 686 687
		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;
	    }
688
	else	/* a miss or crap from the other end */
689
		{
690 691
		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
692
		s->hit=0;
693 694 695 696 697 698 699 700 701 702
		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 */
703 704 705 706 707 708
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
709
		al=SSL_AD_ILLEGAL_PARAMETER;
710 711 712 713 714 715
		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
716
	i=sk_SSL_CIPHER_find(sk,c);
717 718 719
	if (i < 0)
		{
		/* we did not say we would use this cipher */
720
		al=SSL_AD_ILLEGAL_PARAMETER;
721 722 723 724
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

725 726 727 728 729
	/* 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;
730
	if (s->hit && (s->session->cipher_id != c->id))
731
		{
732
		if (!(s->options &
733 734
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
735
			al=SSL_AD_ILLEGAL_PARAMETER;
736 737 738 739 740 741 742
			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 */
743
	/* COMPRESSION */
744
	j= *(p++);
745 746 747 748 749 750
	if (j == 0)
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
751
		{
752
		al=SSL_AD_ILLEGAL_PARAMETER;
753 754 755
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
756 757 758 759
	else
		{
		s->s3->tmp.new_compression=comp;
		}
760 761 762 763

	if (p != (d+n))
		{
		/* wrong packet length */
764
		al=SSL_AD_DECODE_ERROR;
765 766 767 768 769 770 771 772 773 774 775
		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
776
static int ssl3_get_server_certificate(SSL *s)
777 778 779 780 781
	{
	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
782
	STACK_OF(X509) *sk=NULL;
783
	SESS_CERT *sc;
784
	EVP_PKEY *pkey=NULL;
785
        int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
786 787 788 789 790

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
791
		s->max_cert_list,
792 793 794 795 796 797 798 799 800 801 802 803
		&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)
		{
804
		al=SSL_AD_UNEXPECTED_MESSAGE;
805 806 807
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
808
	d=p=(unsigned char *)s->init_msg;
809

B
Ben Laurie 已提交
810
	if ((sk=sk_X509_new_null()) == NULL)
811 812 813 814 815 816 817 818
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
819
		al=SSL_AD_DECODE_ERROR;
820 821 822 823 824 825 826 827
		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)
			{
828
			al=SSL_AD_DECODE_ERROR;
829 830 831 832 833 834 835 836
			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)
			{
837
			al=SSL_AD_BAD_CERTIFICATE;
838 839 840 841 842
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
843
			al=SSL_AD_DECODE_ERROR;
844 845 846
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
847
		if (!sk_X509_push(sk,x))
848 849 850 851 852 853 854 855 856 857
			{
			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);
858 859 860 861 862 863
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i)
#ifndef OPENSSL_NO_KRB5
                && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK))
                != (SSL_aKRB5|SSL_kKRB5)
#endif /* OPENSSL_NO_KRB5 */
                )
864 865 866 867 868
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
869
	ERR_clear_error(); /* but we keep s->verify_result */
870

871 872
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
873

874 875
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
876

877
	sc->cert_chain=sk;
878 879
	/* 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
880
	x=sk_X509_value(sk,0);
881
	sk=NULL;
882
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
883 884 885

	pkey=X509_get_pubkey(x);

886
        /* VRS: allow null cert if auth == KRB5 */
887 888
        need_cert =	((s->s3->tmp.new_cipher->algorithms
			& (SSL_MKEY_MASK|SSL_AUTH_MASK))
889 890 891 892 893 894 895 896 897
                        == (SSL_aKRB5|SSL_kKRB5))? 0: 1;

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

898
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
899 900 901
		{
		x=NULL;
		al=SSL3_AL_FATAL;
902 903
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
904 905 906 907
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
908
	if (need_cert && i < 0)
909 910 911
		{
		x=NULL;
		al=SSL3_AL_FATAL;
912 913
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
914 915 916
		goto f_err;
		}

917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941
        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;
                }
942
	s->session->verify_result = s->verify_result;
943 944 945 946 947 948 949 950 951 952

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
953 954
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
955
	sk_X509_pop_free(sk,X509_free);
956 957 958
	return(ret);
	}

U
Ulf Möller 已提交
959
static int ssl3_get_key_exchange(SSL *s)
960
	{
961
#ifndef OPENSSL_NO_RSA
962 963 964 965 966 967 968
	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;
969
#ifndef OPENSSL_NO_RSA
970
	RSA *rsa=NULL;
971
#endif
972
#ifndef OPENSSL_NO_DH
973
	DH *dh=NULL;
974
#endif
B
Bodo Möller 已提交
975 976 977 978 979 980 981
#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
982

983 984
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
985 986 987 988
	n=ssl3_get_message(s,
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
989
		s->max_cert_list,
990 991 992 993 994 995 996 997 998 999
		&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);
		}

1000
	param=p=(unsigned char *)s->init_msg;
1001

1002
	if (s->session->sess_cert != NULL)
1003
		{
1004
#ifndef OPENSSL_NO_RSA
1005
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
1006
			{
1007 1008
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
1009 1010
			}
#endif
1011
#ifndef OPENSSL_NO_DH
1012
		if (s->session->sess_cert->peer_dh_tmp)
1013
			{
1014 1015
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
1016
			}
B
Bodo Möller 已提交
1017 1018 1019 1020 1021 1022 1023
#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;
			}
1024 1025 1026 1027
#endif
		}
	else
		{
1028
		s->session->sess_cert=ssl_sess_cert_new();
1029 1030 1031 1032
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;
1033
	EVP_MD_CTX_init(&md_ctx);
1034

1035
#ifndef OPENSSL_NO_RSA
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
	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)
			{
1047
			al=SSL_AD_DECODE_ERROR;
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
			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)
			{
1062
			al=SSL_AD_DECODE_ERROR;
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
			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)
1076
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1077 1078
		else
			{
B
Bodo Möller 已提交
1079
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1080 1081
			goto err;
			}
1082
		s->session->sess_cert->peer_rsa_tmp=rsa;
1083
		rsa=NULL;
1084
		}
1085
#else /* OPENSSL_NO_RSA */
1086 1087
	if (0)
		;
1088
#endif
1089
#ifndef OPENSSL_NO_DH
1090
	else if (alg & SSL_kEDH)
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
		{
		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)
			{
1101
			al=SSL_AD_DECODE_ERROR;
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
			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)
			{
1116
			al=SSL_AD_DECODE_ERROR;
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
			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)
			{
1131
			al=SSL_AD_DECODE_ERROR;
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
			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;

1143
#ifndef OPENSSL_NO_RSA
1144
		if (alg & SSL_aRSA)
1145
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1146 1147 1148
#else
		if (0)
			;
1149
#endif
1150
#ifndef OPENSSL_NO_DSA
1151
		else if (alg & SSL_aDSS)
1152
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1153 1154 1155
#endif
		/* else anonymous DH, so no certificate or pkey. */

1156
		s->session->sess_cert->peer_dh_tmp=dh;
1157
		dh=NULL;
1158 1159 1160
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1161
		al=SSL_AD_ILLEGAL_PARAMETER;
1162 1163 1164
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
1165
#endif /* !OPENSSL_NO_DH */
B
Bodo Möller 已提交
1166 1167 1168 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

#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 */
1261 1262 1263 1264 1265 1266 1267
	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;
		}

1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280

	/* 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 */
1281
			al=SSL_AD_DECODE_ERROR;
1282
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1283
			goto f_err;
1284 1285
			}

1286
#ifndef OPENSSL_NO_RSA
1287 1288 1289 1290 1291 1292 1293 1294
		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
1295 1296
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
1297 1298 1299
				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
1300
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1301 1302 1303
				q+=i;
				j+=i;
				}
1304 1305 1306
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1307
				{
1308
				al=SSL_AD_DECRYPT_ERROR;
1309 1310 1311
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1312
			if (i == 0)
1313 1314
				{
				/* bad signature */
1315
				al=SSL_AD_DECRYPT_ERROR;
1316 1317 1318 1319 1320 1321
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
1322
#ifndef OPENSSL_NO_DSA
1323 1324 1325
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
D
 
Dr. Stephen Henson 已提交
1326
			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1327 1328 1329 1330 1331 1332
			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 */
1333
				al=SSL_AD_DECRYPT_ERROR;
1334 1335 1336 1337 1338
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
B
Bodo Möller 已提交
1339 1340
#endif
#ifndef OPENSSL_NO_ECDSA
1341
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356
			{
			/* 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
1357 1358
#endif
			{
B
Bodo Möller 已提交
1359
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1360 1361 1362 1363 1364 1365 1366 1367
			goto err;
			}
		}
	else
		{
		/* still data left over */
		if (!(alg & SSL_aNULL))
			{
B
Bodo Möller 已提交
1368
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1369 1370 1371 1372
			goto err;
			}
		if (n != 0)
			{
1373
			al=SSL_AD_DECODE_ERROR;
1374 1375 1376 1377
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1378
	EVP_PKEY_free(pkey);
1379
	EVP_MD_CTX_cleanup(&md_ctx);
1380 1381 1382 1383
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1384
	EVP_PKEY_free(pkey);
1385
#ifndef OPENSSL_NO_RSA
1386 1387 1388
	if (rsa != NULL)
		RSA_free(rsa);
#endif
1389
#ifndef OPENSSL_NO_DH
1390 1391
	if (dh != NULL)
		DH_free(dh);
B
Bodo Möller 已提交
1392 1393 1394 1395 1396 1397
#endif
#ifndef OPENSSL_NO_ECDH
	BN_CTX_free(bn_ctx);
	EC_POINT_free(srvr_ecpoint);
	if (ecdh != NULL)
		EC_KEY_free(ecdh);
1398
#endif
1399
	EVP_MD_CTX_cleanup(&md_ctx);
1400 1401 1402
	return(-1);
	}

U
Ulf Möller 已提交
1403
static int ssl3_get_certificate_request(SSL *s)
1404 1405
	{
	int ok,ret=0;
1406 1407
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1408 1409
	X509_NAME *xn=NULL;
	unsigned char *p,*d,*q;
B
Ben Laurie 已提交
1410
	STACK_OF(X509_NAME) *ca_sk=NULL;
1411 1412 1413 1414 1415

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
1416
		s->max_cert_list,
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
		&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)
		{
1431
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1432 1433 1434 1435
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447
	/* 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;
			}
		}

1448
	d=p=(unsigned char *)s->init_msg;
1449

B
Ben Laurie 已提交
1450
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
		{
		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);
1466 1467 1468 1469 1470 1471 1472 1473 1474
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1475 1476
	if ((llen+ctype_num+2+1) != n)
		{
1477
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1478 1479 1480 1481 1482 1483 1484 1485 1486
		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)
			{
1487
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1488
				goto cont; /* netscape bugs */
1489
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1490 1491 1492 1493 1494 1495 1496 1497
			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
1498
			/* If netscape tolerance is on, ignore errors */
1499
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1500 1501 1502
				goto cont;
			else
				{
1503
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1504 1505 1506 1507 1508 1509 1510
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1511
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1512 1513 1514
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1515
		if (!sk_X509_NAME_push(ca_sk,xn))
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530
			{
			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
1531
	/* we should setup a certificate to return.... */
1532 1533 1534
	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
1535
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1536 1537 1538 1539 1540
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1541
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1542 1543 1544
	return(ret);
	}

1545
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1546 1547 1548 1549
	{
	return(X509_NAME_cmp(*a,*b));
	}

U
Ulf Möller 已提交
1550
static int ssl3_get_server_done(SSL *s)
1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
	{
	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 */
1566
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1567
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
1568
		return -1;
1569 1570 1571 1572 1573
		}
	ret=1;
	return(ret);
	}

U
Ulf Möller 已提交
1574
static int ssl3_send_client_key_exchange(SSL *s)
1575
	{
1576
	unsigned char *p,*d;
1577 1578
	int n;
	unsigned long l;
1579
#ifndef OPENSSL_NO_RSA
1580
	unsigned char *q;
1581
	EVP_PKEY *pkey=NULL;
1582
#endif
1583
#ifndef OPENSSL_NO_KRB5
1584
        KSSL_ERR kssl_err;
1585
#endif /* OPENSSL_NO_KRB5 */
B
Bodo Möller 已提交
1586 1587 1588 1589 1590 1591 1592 1593
#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
1594 1595 1596 1597 1598 1599 1600 1601

	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;

1602 1603
                /* Fool emacs indentation */
                if (0) {}
1604
#ifndef OPENSSL_NO_RSA
1605
		else if (l & SSL_kRSA)
1606 1607
			{
			RSA *rsa;
1608
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1609

1610 1611
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1612 1613
			else
				{
1614
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1615 1616 1617 1618
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1619
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1620 1621 1622
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1623
				EVP_PKEY_free(pkey);
1624 1625
				}
				
1626 1627
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1628
			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
1629
					goto err;
1630

1631
			s->session->master_key_length=sizeof tmp_buf;
1632

1633 1634 1635 1636
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
1637
			n=RSA_public_encrypt(sizeof tmp_buf,
1638
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1639 1640 1641 1642
#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
1643 1644 1645 1646 1647 1648
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1649 1650 1651 1652 1653 1654 1655
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1656
			s->session->master_key_length=
1657
				s->method->ssl3_enc->generate_master_secret(s,
1658
					s->session->master_key,
1659
					tmp_buf,sizeof tmp_buf);
1660
			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
1661
			}
1662
#endif
1663
#ifndef OPENSSL_NO_KRB5
1664 1665 1666 1667
		else if (l & SSL_kKRB5)
                        {
                        krb5_error_code	krb5rc;
                        KSSL_CTX	*kssl_ctx = s->kssl_ctx;
1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
                        /*  krb5_data	krb5_ap_req;  */
                        krb5_data	*enc_ticket;
                        krb5_data	authenticator, *authp = NULL;
			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);
1678

D
 
Dr. Stephen Henson 已提交
1679 1680
			EVP_CIPHER_CTX_init(&ciph_ctx);

1681 1682 1683 1684 1685
#ifdef KSSL_DEBUG
                        printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
                                l, SSL_kKRB5);
#endif	/* KSSL_DEBUG */

1686 1687 1688 1689 1690 1691 1692 1693
			authp = NULL;
#ifdef KRB5SENDAUTH
			if (KRB5SENDAUTH)  authp = &authenticator;
#endif	/* KRB5SENDAUTH */

                        krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
				&kssl_err);
			enc = kssl_map_enc(kssl_ctx->enctype);
1694 1695
                        if (enc == NULL)
                            goto err;
1696 1697 1698 1699
#ifdef KSSL_DEBUG
                        {
                        printf("kssl_cget_tkt rtn %d\n", krb5rc);
                        if (krb5rc && kssl_err.text)
1700
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1701 1702 1703 1704 1705
                        }
#endif	/* KSSL_DEBUG */

                        if (krb5rc)
                                {
1706 1707 1708 1709
                                ssl3_send_alert(s,SSL3_AL_FATAL,
						SSL_AD_HANDSHAKE_FAILURE);
                                SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
						kssl_err.reason);
1710 1711 1712
                                goto err;
                                }

1713 1714 1715 1716 1717 1718 1719 1720
			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
			**  in place of RFC 2712 KerberosWrapper, as in:
			**
                        **  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);
1721
                        **
1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
			**  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;
				}
 
1756
			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
1757 1758 1759
			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.
1760
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1761 1762
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1763
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1764 1765
			*/

1766
			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
1767 1768
			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
				kssl_ctx->key,iv);
1769
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
1770
				sizeof tmp_buf);
1771
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1772
			outl += padl;
B
Bodo Möller 已提交
1773 1774 1775 1776 1777
			if (outl > sizeof epms)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
				goto err;
				}
1778 1779 1780 1781 1782 1783 1784 1785
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

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

1786 1787
                        s->session->master_key_length=
                                s->method->ssl3_enc->generate_master_secret(s,
1788
					s->session->master_key,
1789
					tmp_buf, sizeof tmp_buf);
1790

1791 1792
			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
			OPENSSL_cleanse(epms, outl);
1793
                        }
1794
#endif
1795
#ifndef OPENSSL_NO_DH
1796
		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1797 1798 1799
			{
			DH *dh_srvr,*dh_clnt;

1800 1801
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1802 1803 1804
			else
				{
				/* we get them from the cert */
1805
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823
				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 */
1824

1825
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1826

1827 1828 1829 1830 1831 1832 1833 1834
			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=
1835
				s->method->ssl3_enc->generate_master_secret(s,
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850
					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
1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880

#ifndef OPENSSL_NO_ECDH 
		else if ((l & SSL_kECDH) || (l & SSL_kECDHE))
			{
			EC_GROUP *srvr_group = NULL;
			int ecdh_clnt_cert = 0;

			/* 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
1881
				 *      EVP_PKEY_EC) && ...)
B
Bodo Möller 已提交
1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898
				 * 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) ||
1899
				    (srvr_pub_pkey->type != EVP_PKEY_EC) ||
B
Bodo Möller 已提交
1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 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 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
				    (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) 
				{ 
                                /* Reuse key info from our certificate
				 * 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;
					}
				}

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

                        n=ECDH_compute_key(p, srvr_ecpoint, clnt_ecdh);
			if (n <= 0)
                                {
                                SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 
				       ERR_R_ECDH_LIB);
                                goto err;
				}

                        /* generate master key from the result */
                        s->session->master_key_length = s->method->ssl3_enc \
			    -> generate_master_secret(s, 
				s->session->master_key,
				p, n);

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

			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 */
                                /* Encoded point will be copied here */
				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) 
				{
                                 /* group is shared */
				 clnt_ecdh->group = NULL; 
				 EC_KEY_free(clnt_ecdh);
				}
			EVP_PKEY_free(srvr_pub_pkey);
			}
#endif /* !OPENSSL_NO_ECDH */
2019
		else
2020
			{
B
Bodo Möller 已提交
2021 2022 2023 2024
			ssl3_send_alert(s, SSL3_AL_FATAL,
			    SSL_AD_HANDSHAKE_FAILURE);
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
			    ERR_R_INTERNAL_ERROR);
2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
			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
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050
#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);
		}
        EVP_PKEY_free(srvr_pub_pkey);
#endif
2051 2052 2053
	return(-1);
	}

U
Ulf Möller 已提交
2054
static int ssl3_send_client_verify(SSL *s)
2055 2056 2057 2058
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
2059
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
2060
	unsigned u=0;
2061
#endif
2062
	unsigned long n;
2063
#ifndef OPENSSL_NO_DSA
2064 2065
	int j;
#endif
2066 2067 2068 2069 2070 2071 2072

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

2073 2074
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
2075

2076
#ifndef OPENSSL_NO_RSA
2077 2078
		if (pkey->type == EVP_PKEY_RSA)
			{
2079 2080
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
2081 2082
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
2083
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
2084 2085 2086 2087
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
2088 2089
			s2n(u,p);
			n=u+2;
2090 2091 2092
			}
		else
#endif
2093
#ifndef OPENSSL_NO_DSA
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107
			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
2108 2109
#endif
#ifndef OPENSSL_NO_ECDSA
2110
			if (pkey->type == EVP_PKEY_EC)
B
Bodo Möller 已提交
2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124
			{
			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
2125 2126
#endif
			{
B
Bodo Möller 已提交
2127
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140
			goto err;
			}
		*(d++)=SSL3_MT_CERTIFICATE_VERIFY;
		l2n3(n,d);

		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
2141
static int ssl3_send_client_certificate(SSL *s)
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189
	{
	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)
			{
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199
			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;
				}
2200 2201 2202 2203 2204 2205 2206 2207 2208
			}

		/* 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;
2209 2210
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
2211 2212 2213 2214 2215 2216 2217 2218 2219
		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
2220
static int ssl3_check_cert_and_algorithm(SSL *s)
2221 2222 2223 2224
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
2225
	SESS_CERT *sc;
2226
#ifndef OPENSSL_NO_RSA
2227
	RSA *rsa;
2228
#endif
2229
#ifndef OPENSSL_NO_DH
2230
	DH *dh;
2231
#endif
2232

2233
	sc=s->session->sess_cert;
2234

2235
	if (sc == NULL)
2236
		{
B
Bodo Möller 已提交
2237
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
2238 2239 2240 2241 2242 2243
		goto err;
		}

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

	/* we don't have a certificate */
2244
	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
2245 2246
		return(1);

2247
#ifndef OPENSSL_NO_RSA
2248
	rsa=s->session->sess_cert->peer_rsa_tmp;
2249
#endif
2250
#ifndef OPENSSL_NO_DH
2251
	dh=s->session->sess_cert->peer_dh_tmp;
2252
#endif
2253 2254 2255

	/* This is the passed certificate */

2256
	idx=sc->peer_cert_type;
B
Bodo Möller 已提交
2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
#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
2272 2273
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
2274
	EVP_PKEY_free(pkey);
2275 2276 2277 2278 2279 2280 2281 2282

	
	/* 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;
		}
2283
#ifndef OPENSSL_NO_DSA
2284 2285 2286 2287 2288 2289
	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
2290
#ifndef OPENSSL_NO_RSA
2291 2292 2293 2294 2295 2296
	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;
		}
2297
#endif
2298
#ifndef OPENSSL_NO_DH
2299
	if ((algs & SSL_kEDH) &&
2300 2301 2302 2303 2304 2305 2306 2307 2308 2309
		!(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;
		}
2310
#ifndef OPENSSL_NO_DSA
2311 2312 2313 2314 2315 2316 2317 2318
	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

2319
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
2320
		{
2321
#ifndef OPENSSL_NO_RSA
2322 2323
		if (algs & SSL_kRSA)
			{
2324
			if (rsa == NULL
2325
			    || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2326 2327 2328 2329 2330 2331 2332
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
2333
#ifndef OPENSSL_NO_DH
2334
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2335 2336
			    {
			    if (dh == NULL
2337
				|| DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351
				{
				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:
2352
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2353 2354 2355 2356
err:
	return(0);
	}

B
Bodo Möller 已提交
2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397

#ifndef OPENSSL_NO_ECDH
/* This is the complement of nid2curve_id in s3_srvr.c. */
static int curve_id2nid(int curve_id)
{
	/* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) */
	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