s3_clnt.c 38.2 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>
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#include <openssl/md5.h>
#include <openssl/sha.h>
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#include <openssl/evp.h>
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#include "ssl_locl.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);
static int ca_dn_cmp(X509_NAME **a,X509_NAME **b);
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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	{
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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)
		{
		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)
				abort();
			/* 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);

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			if (s->init_buf != NULL)
385
				{
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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:
	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)
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	{
	unsigned char *buf;
	unsigned char *p,*d;
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	int i,j;
451
	unsigned long Time,l;
452
	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)
			{
			memcpy(p,s->session->session_id,i);
			p+=i;
			}
		
		/* Ciphers supported */
		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]));
		if (i == 0)
			{
			SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
			goto err;
			}
		s2n(i,p);
		p+=i;

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		/* COMPRESSION */
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		if (s->ctx->comp_methods == NULL)
			j=0;
		else
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			j=sk_SSL_COMP_num(s->ctx->comp_methods);
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		*(p++)=1+j;
		for (i=0; i<j; i++)
			{
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			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
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			*(p++)=comp->id;
			}
		*(p++)=0; /* Add the NULL method */
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		l=(p-d);
		d=buf;
		*(d++)=SSL3_MT_CLIENT_HELLO;
		l2n3(l,d);

		s->state=SSL3_ST_CW_CLNT_HELLO_B;
		/* number of bytes to write */
		s->init_num=p-buf;
		s->init_off=0;
		}

	/* SSL3_ST_CW_CLNT_HELLO_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
err:
	return(-1);
	}

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static int ssl3_get_server_hello(SSL *s)
535
	{
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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;
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	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);
	d=p=(unsigned char *)s->init_buf->data;

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	if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
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		{
		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;
	    }
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	else	/* a miss or crap from the other end */
594
		{
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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 */
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		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 */
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		}
	p+=j;
	c=ssl_get_cipher_by_char(s,p);
	if (c == NULL)
		{
		/* unknown cipher */
614
		al=SSL_AD_ILLEGAL_PARAMETER;
615 616 617 618 619 620
		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
621
	i=sk_SSL_CIPHER_find(sk,c);
622 623 624
	if (i < 0)
		{
		/* we did not say we would use this cipher */
625
		al=SSL_AD_ILLEGAL_PARAMETER;
626 627 628 629 630 631
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
		goto f_err;
		}

	if (s->hit && (s->session->cipher != c))
		{
632
		if (!(s->options &
633 634
			SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
			{
635
			al=SSL_AD_ILLEGAL_PARAMETER;
636 637 638 639 640 641 642
			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 */
643
	/* COMPRESSION */
644
	j= *(p++);
645 646 647 648 649 650
	if (j == 0)
		comp=NULL;
	else
		comp=ssl3_comp_find(s->ctx->comp_methods,j);
	
	if ((j != 0) && (comp == NULL))
651
		{
652
		al=SSL_AD_ILLEGAL_PARAMETER;
653 654 655
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
		goto f_err;
		}
656 657 658 659
	else
		{
		s->s3->tmp.new_compression=comp;
		}
660 661 662 663

	if (p != (d+n))
		{
		/* wrong packet length */
664
		al=SSL_AD_DECODE_ERROR;
665 666 667 668 669 670 671 672 673 674 675
		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
676
static int ssl3_get_server_certificate(SSL *s)
677 678 679 680 681
	{
	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
682
	STACK_OF(X509) *sk=NULL;
683
	SESS_CERT *sc;
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706
	EVP_PKEY *pkey=NULL;

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_A,
		SSL3_ST_CR_CERT_B,
		-1,
#if defined(MSDOS) && !defined(WIN32)
		1024*30, /* 30k max cert list :-) */
#else
		1024*100, /* 100k max cert list :-) */
#endif
		&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)
		{
707
		al=SSL_AD_UNEXPECTED_MESSAGE;
708 709 710 711 712
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
		goto f_err;
		}
	d=p=(unsigned char *)s->init_buf->data;

B
Ben Laurie 已提交
713
	if ((sk=sk_X509_new_null()) == NULL)
714 715 716 717 718 719 720 721
		{
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	n2l3(p,llen);
	if (llen+3 != n)
		{
722
		al=SSL_AD_DECODE_ERROR;
723 724 725 726 727 728 729 730
		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)
			{
731
			al=SSL_AD_DECODE_ERROR;
732 733 734 735 736 737 738 739
			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)
			{
740
			al=SSL_AD_BAD_CERTIFICATE;
741 742 743 744 745
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
			goto f_err;
			}
		if (q != (p+l))
			{
746
			al=SSL_AD_DECODE_ERROR;
747 748 749
			SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
			goto f_err;
			}
B
Ben Laurie 已提交
750
		if (!sk_X509_push(sk,x))
751 752 753 754 755 756 757 758 759 760
			{
			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);
761
	if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
762 763 764 765 766 767
		{
		al=ssl_verify_alarm_type(s->verify_result);
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
		goto f_err; 
		}

768 769
	sc=ssl_sess_cert_new();
	if (sc == NULL) goto err;
770

771 772
	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
	s->session->sess_cert=sc;
773

774
	sc->cert_chain=sk;
B
Ben Laurie 已提交
775
	x=sk_X509_value(sk,0);
776 777 778 779
	sk=NULL;

	pkey=X509_get_pubkey(x);

780
	if ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))
781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
		{
		x=NULL;
		al=SSL3_AL_FATAL;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
		goto f_err;
		}

	i=ssl_cert_type(x,pkey);
	if (i < 0)
		{
		x=NULL;
		al=SSL3_AL_FATAL;
		SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_UNKNOWN_CERTIFICATE_TYPE);
		goto f_err;
		}

797
	sc->peer_cert_type=i;
798
	CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
799 800 801 802 803 804 805 806
	if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
										 * We just created sc a couple of
										 * lines ago. */
		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)
807
		X509_free(s->session->peer);
808
	CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
809 810 811 812 813 814 815 816 817 818 819
	s->session->peer=x;

	x=NULL;
	ret=1;

	if (0)
		{
f_err:
		ssl3_send_alert(s,SSL3_AL_FATAL,al);
		}
err:
820 821
	EVP_PKEY_free(pkey);
	X509_free(x);
B
Ben Laurie 已提交
822
	sk_X509_pop_free(sk,X509_free);
823 824 825
	return(ret);
	}

U
Ulf Möller 已提交
826
static int ssl3_get_key_exchange(SSL *s)
827 828 829 830 831 832 833 834 835
	{
#ifndef NO_RSA
	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;
836
#ifndef NO_RSA
837
	RSA *rsa=NULL;
838
#endif
839
#ifndef NO_DH
840
	DH *dh=NULL;
841
#endif
842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859

	n=ssl3_get_message(s,
		SSL3_ST_CR_KEY_EXCH_A,
		SSL3_ST_CR_KEY_EXCH_B,
		-1,
		1024*8, /* ?? */
		&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);
		}

	param=p=(unsigned char *)s->init_buf->data;

860
	if (s->session->sess_cert != NULL)
861 862
		{
#ifndef NO_RSA
863
		if (s->session->sess_cert->peer_rsa_tmp != NULL)
864
			{
865 866
			RSA_free(s->session->sess_cert->peer_rsa_tmp);
			s->session->sess_cert->peer_rsa_tmp=NULL;
867 868 869
			}
#endif
#ifndef NO_DH
870
		if (s->session->sess_cert->peer_dh_tmp)
871
			{
872 873
			DH_free(s->session->sess_cert->peer_dh_tmp);
			s->session->sess_cert->peer_dh_tmp=NULL;
874 875 876 877 878
			}
#endif
		}
	else
		{
879
		s->session->sess_cert=ssl_sess_cert_new();
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896
		}

	param_len=0;
	alg=s->s3->tmp.new_cipher->algorithms;

#ifndef NO_RSA
	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)
			{
897
			al=SSL_AD_DECODE_ERROR;
898 899 900 901 902 903 904 905 906 907 908 909 910 911
			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)
			{
912
			al=SSL_AD_DECODE_ERROR;
913 914 915 916 917 918 919 920 921 922 923 924 925
			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)
926
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
927 928 929 930 931
		else
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
			goto err;
			}
932
		s->session->sess_cert->peer_rsa_tmp=rsa;
933
		rsa=NULL;
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948
		}
	else
#endif
#ifndef NO_DH
		if (alg & SSL_kEDH)
		{
		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)
			{
949
			al=SSL_AD_DECODE_ERROR;
950 951 952 953 954 955 956 957 958 959 960 961 962 963
			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)
			{
964
			al=SSL_AD_DECODE_ERROR;
965 966 967 968 969 970 971 972 973 974 975 976 977 978
			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)
			{
979
			al=SSL_AD_DECODE_ERROR;
980 981 982 983 984 985 986 987 988 989 990 991 992
			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;

#ifndef NO_RSA
		if (alg & SSL_aRSA)
993
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
994 995 996 997
		else
#endif
#ifndef NO_DSA
		if (alg & SSL_aDSS)
998
			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
999 1000 1001
#endif
		/* else anonymous DH, so no certificate or pkey. */

1002
		s->session->sess_cert->peer_dh_tmp=dh;
1003
		dh=NULL;
1004 1005 1006
		}
	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
		{
1007
		al=SSL_AD_ILLEGAL_PARAMETER;
1008 1009 1010 1011
		SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
		goto f_err;
		}
#endif
1012 1013 1014 1015 1016 1017 1018
	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;
		}

1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032

	/* 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 */
1033
			al=SSL_AD_DECODE_ERROR;
1034
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1035
			goto f_err;
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
			}

#ifndef NO_RSA
		if (pkey->type == EVP_PKEY_RSA)
			{
			int num;

			j=0;
			q=md_buf;
			for (num=2; num > 0; num--)
				{
1047 1048
				EVP_DigestInit(&md_ctx,(num == 2)
					?s->ctx->md5:s->ctx->sha1);
1049 1050 1051 1052 1053 1054 1055
				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);
				EVP_DigestFinal(&md_ctx,q,(unsigned int *)&i);
				q+=i;
				j+=i;
				}
1056 1057 1058
			i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
								pkey->pkey.rsa);
			if (i < 0)
1059
				{
1060
				al=SSL_AD_DECRYPT_ERROR;
1061 1062 1063
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
				goto f_err;
				}
1064
			if (i == 0)
1065 1066
				{
				/* bad signature */
1067
				al=SSL_AD_DECRYPT_ERROR;
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
#ifndef NO_DSA
			if (pkey->type == EVP_PKEY_DSA)
			{
			/* lets do DSS */
			EVP_VerifyInit(&md_ctx,EVP_dss1());
			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 */
1085
				al=SSL_AD_DECRYPT_ERROR;
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
				SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
				goto f_err;
				}
			}
		else
#endif
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
			goto err;
			}
		}
	else
		{
		/* still data left over */
		if (!(alg & SSL_aNULL))
			{
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
			goto err;
			}
		if (n != 0)
			{
1107
			al=SSL_AD_DECODE_ERROR;
1108 1109 1110 1111
			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
			goto f_err;
			}
		}
1112
	EVP_PKEY_free(pkey);
1113 1114 1115 1116
	return(1);
f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
1117
	EVP_PKEY_free(pkey);
1118 1119 1120 1121 1122 1123 1124 1125
#ifndef NO_RSA
	if (rsa != NULL)
		RSA_free(rsa);
#endif
#ifndef NO_DH
	if (dh != NULL)
		DH_free(dh);
#endif
1126 1127 1128
	return(-1);
	}

U
Ulf Möller 已提交
1129
static int ssl3_get_certificate_request(SSL *s)
1130 1131
	{
	int ok,ret=0;
1132 1133
	unsigned long n,nc,l;
	unsigned int llen,ctype_num,i;
1134 1135
	X509_NAME *xn=NULL;
	unsigned char *p,*d,*q;
B
Ben Laurie 已提交
1136
	STACK_OF(X509_NAME) *ca_sk=NULL;
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160

	n=ssl3_get_message(s,
		SSL3_ST_CR_CERT_REQ_A,
		SSL3_ST_CR_CERT_REQ_B,
		-1,
#if defined(MSDOS) && !defined(WIN32)
		1024*30,  /* 30k max cert list :-) */
#else
		1024*100, /* 100k max cert list :-) */
#endif
		&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)
		{
1161
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1162 1163 1164 1165
		SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
		goto err;
		}

1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177
	/* 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;
			}
		}

1178 1179
	d=p=(unsigned char *)s->init_buf->data;

B
Ben Laurie 已提交
1180
	if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
		{
		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);
1196 1197 1198 1199 1200 1201 1202 1203 1204
#if 0
{
FILE *out;
out=fopen("/tmp/vsign.der","w");
fwrite(p,1,llen,out);
fclose(out);
}
#endif

1205 1206
	if ((llen+ctype_num+2+1) != n)
		{
1207
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1208 1209 1210 1211 1212 1213 1214 1215 1216
		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)
			{
1217
			if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1218
				goto cont; /* netscape bugs */
1219
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1220 1221 1222 1223 1224 1225 1226 1227 1228
			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)
			{
			/* If netscape tollerance is on, ignore errors */
1229
			if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
1230 1231 1232
				goto cont;
			else
				{
1233
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1234 1235 1236 1237 1238 1239 1240
				SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
				goto err;
				}
			}

		if (q != (p+l))
			{
1241
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1242 1243 1244
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
			goto err;
			}
B
Ben Laurie 已提交
1245
		if (!sk_X509_NAME_push(ca_sk,xn))
1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
			{
			SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
			goto err;
			}

		p+=l;
		nc+=l+2;
		}

	if (0)
		{
cont:
		ERR_clear_error();
		}

	/* we should setup a certficate to return.... */
	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
1265
		sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
1266 1267 1268 1269 1270
	s->s3->tmp.ca_names=ca_sk;
	ca_sk=NULL;

	ret=1;
err:
B
Ben Laurie 已提交
1271
	if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
1272 1273 1274
	return(ret);
	}

U
Ulf Möller 已提交
1275
static int ca_dn_cmp(X509_NAME **a, X509_NAME **b)
1276 1277 1278 1279
	{
	return(X509_NAME_cmp(*a,*b));
	}

U
Ulf Möller 已提交
1280
static int ssl3_get_server_done(SSL *s)
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295
	{
	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 */
1296
		ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1297 1298 1299 1300 1301 1302
		SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
		}
	ret=1;
	return(ret);
	}

U
Ulf Möller 已提交
1303
static int ssl3_send_client_key_exchange(SSL *s)
1304
	{
1305
	unsigned char *p,*d;
1306 1307
	int n;
	unsigned long l;
1308 1309
#ifndef NO_RSA
	unsigned char *q;
1310
	EVP_PKEY *pkey=NULL;
1311
#endif
1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323

	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;

#ifndef NO_RSA
		if (l & SSL_kRSA)
			{
			RSA *rsa;
1324
			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
1325

1326 1327
			if (s->session->sess_cert->peer_rsa_tmp != NULL)
				rsa=s->session->sess_cert->peer_rsa_tmp;
1328 1329
			else
				{
1330
				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1331 1332 1333 1334 1335 1336 1337 1338
				if ((pkey == NULL) ||
					(pkey->type != EVP_PKEY_RSA) ||
					(pkey->pkey.rsa == NULL))
					{
					SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
					goto err;
					}
				rsa=pkey->pkey.rsa;
B
Bodo Möller 已提交
1339
				EVP_PKEY_free(pkey);
1340 1341
				}
				
1342 1343
			tmp_buf[0]=s->client_version>>8;
			tmp_buf[1]=s->client_version&0xff;
1344 1345
			if (RAND_bytes(&(tmp_buf[2]),SSL_MAX_MASTER_KEY_LENGTH-2) <= 0)
					goto err;
1346 1347 1348

			s->session->master_key_length=SSL_MAX_MASTER_KEY_LENGTH;

1349 1350 1351 1352 1353 1354
			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);
1355 1356 1357 1358
#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
1359 1360 1361 1362 1363 1364
			if (n <= 0)
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
				goto err;
				}

1365 1366 1367 1368 1369 1370 1371
			/* Fix buf for TLS and beyond */
			if (s->version > SSL3_VERSION)
				{
				s2n(n,q);
				n+=2;
				}

1372
			s->session->master_key_length=
1373
				s->method->ssl3_enc->generate_master_secret(s,
1374
					s->session->master_key,
1375 1376
					tmp_buf,SSL_MAX_MASTER_KEY_LENGTH);
			memset(tmp_buf,0,SSL_MAX_MASTER_KEY_LENGTH);
1377 1378 1379 1380 1381 1382 1383 1384
			}
		else
#endif
#ifndef NO_DH
		if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
			{
			DH *dh_srvr,*dh_clnt;

1385 1386
			if (s->session->sess_cert->peer_dh_tmp != NULL)
				dh_srvr=s->session->sess_cert->peer_dh_tmp;
1387 1388 1389
			else
				{
				/* we get them from the cert */
1390
				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
				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 */
1409

1410
			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
1411

1412 1413 1414 1415 1416 1417 1418 1419
			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=
1420
				s->method->ssl3_enc->generate_master_secret(s,
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
					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*/
			}
		else
#endif
			{
1438
			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
			SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
			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
1458
static int ssl3_send_client_verify(SSL *s)
1459 1460 1461 1462
	{
	unsigned char *p,*d;
	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
	EVP_PKEY *pkey;
1463
#ifndef NO_RSA
B
Ben Laurie 已提交
1464
	unsigned u=0;
1465
#endif
1466
	unsigned long n;
1467 1468 1469
#ifndef NO_DSA
	int j;
#endif
1470 1471 1472 1473 1474 1475 1476

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

1477 1478
		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
			&(data[MD5_DIGEST_LENGTH]));
1479 1480 1481 1482

#ifndef NO_RSA
		if (pkey->type == EVP_PKEY_RSA)
			{
1483 1484
			s->method->ssl3_enc->cert_verify_mac(s,
				&(s->s3->finish_dgst1),&(data[0]));
1485 1486
			if (RSA_sign(NID_md5_sha1, data,
					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
B
Ben Laurie 已提交
1487
					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
1488 1489 1490 1491
				{
				SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
				goto err;
				}
B
Ben Laurie 已提交
1492 1493
			s2n(u,p);
			n=u+2;
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 1522 1523 1524 1525 1526 1527
			}
		else
#endif
#ifndef NO_DSA
			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
			{
			SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,SSL_R_INTERNAL_ERROR);
			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
1528
static int ssl3_send_client_certificate(SSL *s)
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576
	{
	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)
			{
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586
			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;
				}
1587 1588 1589 1590 1591 1592 1593 1594 1595
			}

		/* 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;
1596 1597
		l=ssl3_output_cert_chain(s,
			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
1598 1599 1600 1601 1602 1603 1604 1605 1606
		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
1607
static int ssl3_check_cert_and_algorithm(SSL *s)
1608 1609 1610 1611
	{
	int i,idx;
	long algs;
	EVP_PKEY *pkey=NULL;
1612
	SESS_CERT *sc;
1613
#ifndef NO_RSA
1614
	RSA *rsa;
1615 1616
#endif
#ifndef NO_DH
1617
	DH *dh;
1618
#endif
1619

1620
	sc=s->session->sess_cert;
1621

1622
	if (sc == NULL)
1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633
		{
		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
		goto err;
		}

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

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

1634
#ifndef NO_RSA
1635
	rsa=s->session->sess_cert->peer_rsa_tmp;
1636 1637
#endif
#ifndef NO_DH
1638
	dh=s->session->sess_cert->peer_dh_tmp;
1639
#endif
1640 1641 1642

	/* This is the passed certificate */

1643 1644 1645
	idx=sc->peer_cert_type;
	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
1646
	EVP_PKEY_free(pkey);
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661

	
	/* 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;
		}
#ifndef NO_DSA
	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
1662
#ifndef NO_RSA
1663 1664 1665 1666 1667 1668
	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;
		}
1669
#endif
1670
#ifndef NO_DH
1671
	if ((algs & SSL_kEDH) &&
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690
		!(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;
		}
#ifndef NO_DSA
	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

1691
	if (SSL_IS_EXPORT(algs) && !has_bits(i,EVP_PKT_EXP))
1692 1693 1694 1695
		{
#ifndef NO_RSA
		if (algs & SSL_kRSA)
			{
1696 1697
			if (rsa == NULL
			    || RSA_size(rsa) > SSL_EXPORT_PKEYLENGTH(algs))
1698 1699 1700 1701 1702 1703 1704 1705 1706
				{
				SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
				goto f_err;
				}
			}
		else
#endif
#ifndef NO_DH
			if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1707 1708 1709
			    {
			    if (dh == NULL
				|| DH_size(dh) > SSL_EXPORT_PKEYLENGTH(algs))
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723
				{
				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:
1724
	ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
1725 1726 1727 1728
err:
	return(0);
	}