s3_clnt.c 44.5 KB
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/* ssl/s3_clnt.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.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 "ssl_locl.h"
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#include "kssl_lcl.h"
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#include <openssl/md5.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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static SSL_METHOD *ssl3_get_client_method(int ver)
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	{
82
	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)
		{
		init=0;
		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;
		}
	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;
	void (*cb)()=NULL;
	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;
	
	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
	s->in_handshake++;

	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:
			/* Check if it is anon DH */
			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 */
			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);

389
			if (s->init_buf != NULL)
390
				{
391 392
				BUF_MEM_free(s->init_buf);
				s->init_buf=NULL;
393
				}
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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:
	if (cb != NULL)
		cb(s,SSL_CB_CONNECT_EXIT,ret);
	s->in_handshake--;
	return(ret);
	}


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static int ssl3_client_hello(SSL *s)
452 453 454
	{
	unsigned char *buf;
	unsigned char *p,*d;
455
	int i,j;
456
	unsigned long Time,l;
457
	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) ||
463 464
			(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)
			{
			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;

509
		/* 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);
	}

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static int ssl3_get_server_hello(SSL *s)
540
	{
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	STACK_OF(SSL_CIPHER) *sk;
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	SSL_CIPHER *c;
	unsigned char *p,*d;
	int i,al,ok;
	unsigned int j;
	long n;
547
	SSL_COMP *comp;
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	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);
557
	d=p=(unsigned char *)s->init_msg;
558

559
	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
560 561
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
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		s->version=(s->version&0xff00)|p[1];
		al=SSL_AD_PROTOCOL_VERSION;
		goto f_err;
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		}
	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++);

	if ((j != 0) && (j != SSL3_SESSION_ID_SIZE))
		{
		/* SSLref returns 16 :-( */
		if (j < SSL2_SSL_SESSION_ID_LENGTH)
			{
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			al=SSL_AD_ILLEGAL_PARAMETER;
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			SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_SHORT);
			goto f_err;
			}
		}
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	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))
		{
		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;
	    }
598
	else	/* a miss or crap from the other end */
599
		{
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		/* If we were trying for session-id reuse, make a new
		 * SSL_SESSION so we don't stuff up other people */
602
		s->hit=0;
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		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 */
613 614 615 616 617 618
		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
619
		al=SSL_AD_ILLEGAL_PARAMETER;
620 621 622 623 624 625
		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
626
	i=sk_SSL_CIPHER_find(sk,c);
627 628 629
	if (i < 0)
		{
		/* we did not say we would use this cipher */
630
		al=SSL_AD_ILLEGAL_PARAMETER;
631 632 633 634 635 636
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

	if (s->hit && (s->session->cipher != c))
		{
637
		if (!(s->options &
638 639
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
640
			al=SSL_AD_ILLEGAL_PARAMETER;
641 642 643 644 645 646 647
			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 */
648
	/* COMPRESSION */
649
	j= *(p++);
650 651 652 653 654 655
	if (j == 0)
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
656
		{
657
		al=SSL_AD_ILLEGAL_PARAMETER;
658 659 660
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
661 662 663 664
	else
		{
		s->s3->tmp.new_compression=comp;
		}
665 666 667 668

	if (p != (d+n))
		{
		/* wrong packet length */
669
		al=SSL_AD_DECODE_ERROR;
670 671 672 673 674 675 676 677 678 679 680
		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
681
static int ssl3_get_server_certificate(SSL *s)
682 683 684 685 686
	{
	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
687
	STACK_OF(X509) *sk=NULL;
688
	SESS_CERT *sc;
689
	EVP_PKEY *pkey=NULL;
690
        int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
691 692 693 694 695

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
696
		s->max_cert_list,
697 698 699 700 701 702 703 704 705 706 707 708
		&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)
		{
709
		al=SSL_AD_UNEXPECTED_MESSAGE;
710 711 712
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
713
	d=p=(unsigned char *)s->init_msg;
714

B
Ben Laurie 已提交
715
	if ((sk=sk_X509_new_null()) == NULL)
716 717 718 719 720 721 722 723
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
724
		al=SSL_AD_DECODE_ERROR;
725 726 727 728 729 730 731 732
		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)
			{
733
			al=SSL_AD_DECODE_ERROR;
734 735 736 737 738 739 740 741
			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)
			{
742
			al=SSL_AD_BAD_CERTIFICATE;
743 744 745 746 747
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
748
			al=SSL_AD_DECODE_ERROR;
749 750 751
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
752
		if (!sk_X509_push(sk,x))
753 754 755 756 757 758 759 760 761 762
			{
			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);
763 764 765 766 767 768
	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 */
                )
769 770 771 772 773
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}
774
	ERR_clear_error(); /* but we keep s->verify_result */
775

776 777
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
778

779 780
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
781

782
	sc->cert_chain=sk;
783 784
	/* 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
785
	x=sk_X509_value(sk,0);
786
	sk=NULL;
787
 	/* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
788 789 790

	pkey=X509_get_pubkey(x);

791
        /* VRS: allow null cert if auth == KRB5 */
792 793
        need_cert =	((s->s3->tmp.new_cipher->algorithms
			& (SSL_MKEY_MASK|SSL_AUTH_MASK))
794 795 796 797 798 799 800 801 802
                        == (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 */

803
	if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
804 805 806
		{
		x=NULL;
		al=SSL3_AL_FATAL;
807 808
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
809 810 811 812
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
813
	if (need_cert && i < 0)
814 815 816
		{
		x=NULL;
		al=SSL3_AL_FATAL;
817 818
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
			SSL_R_UNKNOWN_CERTIFICATE_TYPE);
819 820 821
		goto f_err;
		}

822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
        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;
                }
847
	s->session->verify_result = s->verify_result;
848 849 850 851 852 853 854 855 856 857

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
858 859
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
860
	sk_X509_pop_free(sk,X509_free);
861 862 863
	return(ret);
	}

U
Ulf Möller 已提交
864
static int ssl3_get_key_exchange(SSL *s)
865
	{
866
#ifndef OPENSSL_NO_RSA
867 868 869 870 871 872 873
	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;
874
#ifndef OPENSSL_NO_RSA
875
	RSA *rsa=NULL;
876
#endif
877
#ifndef OPENSSL_NO_DH
878
	DH *dh=NULL;
879
#endif
880

881 882
	/* use same message size as in ssl3_get_certificate_request()
	 * as ServerKeyExchange message may be skipped */
883 884 885 886
	n=ssl3_get_message(s,
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
887
		s->max_cert_list,
888 889 890 891 892 893 894 895 896 897
		&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);
		}

898
	param=p=(unsigned char *)s->init_msg;
899

900
	if (s->session->sess_cert != NULL)
901
		{
902
#ifndef OPENSSL_NO_RSA
903
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
904
			{
905 906
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
907 908
			}
#endif
909
#ifndef OPENSSL_NO_DH
910
		if (s->session->sess_cert->peer_dh_tmp)
911
			{
912 913
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
914 915 916 917 918
			}
#endif
		}
	else
		{
919
		s->session->sess_cert=ssl_sess_cert_new();
920 921 922 923
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;
924
	EVP_MD_CTX_init(&md_ctx);
925

926
#ifndef OPENSSL_NO_RSA
927 928 929 930 931 932 933 934 935 936 937
	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)
			{
938
			al=SSL_AD_DECODE_ERROR;
939 940 941 942 943 944 945 946 947 948 949 950 951 952
			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)
			{
953
			al=SSL_AD_DECODE_ERROR;
954 955 956 957 958 959 960 961 962 963 964 965 966
			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)
967
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
968 969
		else
			{
B
Bodo Möller 已提交
970
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
971 972
			goto err;
			}
973
		s->session->sess_cert->peer_rsa_tmp=rsa;
974
		rsa=NULL;
975
		}
976
#else /* OPENSSL_NO_RSA */
977 978
	if (0)
		;
979
#endif
980
#ifndef OPENSSL_NO_DH
981
	else if (alg & SSL_kEDH)
982 983 984 985 986 987 988 989 990 991
		{
		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)
			{
992
			al=SSL_AD_DECODE_ERROR;
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
			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)
			{
1007
			al=SSL_AD_DECODE_ERROR;
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
			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)
			{
1022
			al=SSL_AD_DECODE_ERROR;
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
			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;

1034
#ifndef OPENSSL_NO_RSA
1035
		if (alg & SSL_aRSA)
1036
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1037 1038 1039
#else
		if (0)
			;
1040
#endif
1041
#ifndef OPENSSL_NO_DSA
1042
		else if (alg & SSL_aDSS)
1043
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1044 1045 1046
#endif
		/* else anonymous DH, so no certificate or pkey. */

1047
		s->session->sess_cert->peer_dh_tmp=dh;
1048
		dh=NULL;
1049 1050 1051
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1052
		al=SSL_AD_ILLEGAL_PARAMETER;
1053 1054 1055
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
1056
#endif /* !OPENSSL_NO_DH */
1057 1058 1059 1060 1061 1062 1063
	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;
		}

1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077

	/* 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 */
1078
			al=SSL_AD_DECODE_ERROR;
1079
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1080
			goto f_err;
1081 1082
			}

1083
#ifndef OPENSSL_NO_RSA
1084 1085 1086 1087 1088 1089 1090 1091
		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
1092 1093
				EVP_DigestInit_ex(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1, NULL);
1094 1095 1096
				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
1097
				EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1098 1099 1100
				q+=i;
				j+=i;
				}
1101 1102 1103
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1104
				{
1105
				al=SSL_AD_DECRYPT_ERROR;
1106 1107 1108
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1109
			if (i == 0)
1110 1111
				{
				/* bad signature */
1112
				al=SSL_AD_DECRYPT_ERROR;
1113 1114 1115 1116 1117 1118
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
1119
#ifndef OPENSSL_NO_DSA
1120 1121 1122
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
D
 
Dr. Stephen Henson 已提交
1123
			EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL);
1124 1125 1126 1127 1128 1129
			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 */
1130
				al=SSL_AD_DECRYPT_ERROR;
1131 1132 1133 1134 1135 1136 1137
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
			{
B
Bodo Möller 已提交
1138
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1139 1140 1141 1142 1143 1144 1145 1146
			goto err;
			}
		}
	else
		{
		/* still data left over */
		if (!(alg & SSL_aNULL))
			{
B
Bodo Möller 已提交
1147
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1148 1149 1150 1151
			goto err;
			}
		if (n != 0)
			{
1152
			al=SSL_AD_DECODE_ERROR;
1153 1154 1155 1156
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1157
	EVP_PKEY_free(pkey);
1158
	EVP_MD_CTX_cleanup(&md_ctx);
1159 1160 1161 1162
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1163
	EVP_PKEY_free(pkey);
1164
#ifndef OPENSSL_NO_RSA
1165 1166 1167
	if (rsa != NULL)
		RSA_free(rsa);
#endif
1168
#ifndef OPENSSL_NO_DH
1169 1170 1171
	if (dh != NULL)
		DH_free(dh);
#endif
1172
	EVP_MD_CTX_cleanup(&md_ctx);
1173 1174 1175
	return(-1);
	}

U
Ulf Möller 已提交
1176
static int ssl3_get_certificate_request(SSL *s)
1177 1178
	{
	int ok,ret=0;
1179 1180
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1181 1182
	X509_NAME *xn=NULL;
	unsigned char *p,*d,*q;
B
Ben Laurie 已提交
1183
	STACK_OF(X509_NAME) *ca_sk=NULL;
1184 1185 1186 1187 1188

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
1189
		s->max_cert_list,
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
		&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)
		{
1204
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1205 1206 1207 1208
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220
	/* 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;
			}
		}

1221
	d=p=(unsigned char *)s->init_msg;
1222

B
Ben Laurie 已提交
1223
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238
		{
		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);
1239 1240 1241 1242 1243 1244 1245 1246 1247
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1248 1249
	if ((llen+ctype_num+2+1) != n)
		{
1250
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1251 1252 1253 1254 1255 1256 1257 1258 1259
		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)
			{
1260
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1261
				goto cont; /* netscape bugs */
1262
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1263 1264 1265 1266 1267 1268 1269 1270
			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
1271
			/* If netscape tolerance is on, ignore errors */
1272
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1273 1274 1275
				goto cont;
			else
				{
1276
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1277 1278 1279 1280 1281 1282 1283
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1284
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1285 1286 1287
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1288
		if (!sk_X509_NAME_push(ca_sk,xn))
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
			{
			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
1304
	/* we should setup a certificate to return.... */
1305 1306 1307
	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
1308
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1309 1310 1311 1312 1313
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1314
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1315 1316 1317
	return(ret);
	}

1318
static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
1319 1320 1321 1322
	{
	return(X509_NAME_cmp(*a,*b));
	}

U
Ulf Möller 已提交
1323
static int ssl3_get_server_done(SSL *s)
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
	{
	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 */
1339
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1340 1341 1342 1343 1344 1345
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
		}
	ret=1;
	return(ret);
	}

U
Ulf Möller 已提交
1346
static int ssl3_send_client_key_exchange(SSL *s)
1347
	{
1348
	unsigned char *p,*d;
1349 1350
	int n;
	unsigned long l;
1351
#ifndef OPENSSL_NO_RSA
1352
	unsigned char *q;
1353
	EVP_PKEY *pkey=NULL;
1354
#endif
1355
#ifndef OPENSSL_NO_KRB5
1356
        KSSL_ERR kssl_err;
1357
#endif /* OPENSSL_NO_KRB5 */
1358 1359 1360 1361 1362 1363 1364 1365

	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;

1366 1367
                /* Fool emacs indentation */
                if (0) {}
1368
#ifndef OPENSSL_NO_RSA
1369
		else if (l & SSL_kRSA)
1370 1371
			{
			RSA *rsa;
1372
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1373

1374 1375
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1376 1377
			else
				{
1378
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1379 1380 1381 1382
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
B
Bodo Möller 已提交
1383
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1384 1385 1386
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1387
				EVP_PKEY_free(pkey);
1388 1389
				}
				
1390 1391
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1392 1393
			if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
					goto err;
1394 1395 1396

			s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;

1397 1398 1399 1400 1401 1402
			q=p;
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				p+=2;
			n=RSA_public_encrypt(SSL_MAX_MASTER_KEY_LENGTH,
				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
1403 1404 1405 1406
#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
1407 1408 1409 1410 1411 1412
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1413 1414 1415 1416 1417 1418 1419
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1420
			s->session->master_key_length=
1421
				s->method->ssl3_enc->generate_master_secret(s,
1422
					s->session->master_key,
1423 1424
					tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
			memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1425
			}
1426
#endif
1427
#ifndef OPENSSL_NO_KRB5
1428 1429 1430 1431
		else if (l & SSL_kKRB5)
                        {
                        krb5_error_code	krb5rc;
                        KSSL_CTX	*kssl_ctx = s->kssl_ctx;
1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
                        /*  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);
1442 1443 1444 1445 1446 1447

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

1448 1449 1450 1451 1452 1453 1454 1455
			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);
1456 1457
                        if (enc == NULL)
                            goto err;
1458 1459 1460 1461
#ifdef KSSL_DEBUG
                        {
                        printf("kssl_cget_tkt rtn %d\n", krb5rc);
                        if (krb5rc && kssl_err.text)
1462
			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
1463 1464 1465 1466 1467
                        }
#endif	/* KSSL_DEBUG */

                        if (krb5rc)
                                {
1468 1469 1470 1471
                                ssl3_send_alert(s,SSL3_AL_FATAL,
						SSL_AD_HANDSHAKE_FAILURE);
                                SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
						kssl_err.reason);
1472 1473 1474
                                goto err;
                                }

1475 1476 1477 1478 1479 1480 1481 1482
			/*  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);
1483
                        **
1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521
			**  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;
				}
 
			if (RAND_bytes(tmp_buf,SSL_MAX_MASTER_KEY_LENGTH) <= 0)
			    goto err;

			/*  20010420 VRS.  Tried it this way; failed.
1522
			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
1523 1524
			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
			**				kssl_ctx->length);
1525
			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
1526 1527 1528
			*/

			memset(iv, 0, EVP_MAX_IV_LENGTH);  /* per RFC 1510 */
1529
			EVP_EncryptInit_ex(&ciph_ctx,enc, kssl_ctx->key,iv);
1530 1531
			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
						SSL_MAX_MASTER_KEY_LENGTH);
1532
			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
1533 1534 1535 1536 1537 1538 1539 1540 1541
			outl += padl;
			EVP_CIPHER_CTX_cleanup(&ciph_ctx);

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

1542 1543
                        s->session->master_key_length=
                                s->method->ssl3_enc->generate_master_secret(s,
1544 1545 1546 1547 1548
					s->session->master_key,
					tmp_buf, SSL_MAX_MASTER_KEY_LENGTH);

			memset(tmp_buf, 0, SSL_MAX_MASTER_KEY_LENGTH);
			memset(epms, 0, outl);
1549
                        }
1550
#endif
1551
#ifndef OPENSSL_NO_DH
1552
		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1553 1554 1555
			{
			DH *dh_srvr,*dh_clnt;

1556 1557
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1558 1559 1560
			else
				{
				/* we get them from the cert */
1561
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579
				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 */
1580

1581
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1582

1583 1584 1585 1586 1587 1588 1589 1590
			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=
1591
				s->method->ssl3_enc->generate_master_secret(s,
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606
					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
1607
		else
1608
			{
1609
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
B
Bodo Möller 已提交
1610
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
			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:
	return(-1);
	}

U
Ulf Möller 已提交
1629
static int ssl3_send_client_verify(SSL *s)
1630 1631 1632 1633
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
1634
#ifndef OPENSSL_NO_RSA
B
Ben Laurie 已提交
1635
	unsigned u=0;
1636
#endif
1637
	unsigned long n;
1638
#ifndef OPENSSL_NO_DSA
1639 1640
	int j;
#endif
1641 1642 1643 1644 1645 1646 1647

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

1648 1649
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
1650

1651
#ifndef OPENSSL_NO_RSA
1652 1653
		if (pkey->type == EVP_PKEY_RSA)
			{
1654 1655
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
1656 1657
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
1658
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
1659 1660 1661 1662
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
1663 1664
			s2n(u,p);
			n=u+2;
1665 1666 1667
			}
		else
#endif
1668
#ifndef OPENSSL_NO_DSA
1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684
			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
#endif
			{
B
Bodo Möller 已提交
1685
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
			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
1699
static int ssl3_send_client_certificate(SSL *s)
1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 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
	{
	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)
			{
1748 1749 1750 1751 1752 1753 1754 1755 1756 1757
			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;
				}
1758 1759 1760 1761 1762 1763 1764 1765 1766
			}

		/* 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;
1767 1768
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1769 1770 1771 1772 1773 1774 1775 1776 1777
		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
1778
static int ssl3_check_cert_and_algorithm(SSL *s)
1779 1780 1781 1782
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
1783
	SESS_CERT *sc;
1784
#ifndef OPENSSL_NO_RSA
1785
	RSA *rsa;
1786
#endif
1787
#ifndef OPENSSL_NO_DH
1788
	DH *dh;
1789
#endif
1790

1791
	sc=s->session->sess_cert;
1792

1793
	if (sc == NULL)
1794
		{
B
Bodo Möller 已提交
1795
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
1796 1797 1798 1799 1800 1801
		goto err;
		}

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

	/* we don't have a certificate */
1802
	if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5))
1803 1804
		return(1);

1805
#ifndef OPENSSL_NO_RSA
1806
	rsa=s->session->sess_cert->peer_rsa_tmp;
1807
#endif
1808
#ifndef OPENSSL_NO_DH
1809
	dh=s->session->sess_cert->peer_dh_tmp;
1810
#endif
1811 1812 1813

	/* This is the passed certificate */

1814 1815 1816
	idx=sc->peer_cert_type;
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1817
	EVP_PKEY_free(pkey);
1818 1819 1820 1821 1822 1823 1824 1825

	
	/* 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;
		}
1826
#ifndef OPENSSL_NO_DSA
1827 1828 1829 1830 1831 1832
	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
1833
#ifndef OPENSSL_NO_RSA
1834 1835 1836 1837 1838 1839
	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;
		}
1840
#endif
1841
#ifndef OPENSSL_NO_DH
1842
	if ((algs & SSL_kEDH) &&
1843 1844 1845 1846 1847 1848 1849 1850 1851 1852
		!(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;
		}
1853
#ifndef OPENSSL_NO_DSA
1854 1855 1856 1857 1858 1859 1860 1861
	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

1862
	if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
1863
		{
1864
#ifndef OPENSSL_NO_RSA
1865 1866
		if (algs & SSL_kRSA)
			{
1867
			if (rsa == NULL
1868
			    || RSA_size(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1869 1870 1871 1872 1873 1874 1875
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
1876
#ifndef OPENSSL_NO_DH
1877
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1878 1879
			    {
			    if (dh == NULL
1880
				|| DH_size(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894
				{
				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:
1895
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1896 1897 1898 1899
err:
	return(0);
	}