sl@0: /* ssl/d1_clnt.c */
sl@0: /* 
sl@0:  * DTLS implementation written by Nagendra Modadugu
sl@0:  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@OpenSSL.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include <stdio.h>
sl@0: #include "ssl_locl.h"
sl@0: #include "kssl_lcl.h"
sl@0: #include <openssl/buffer.h>
sl@0: #include <openssl/rand.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/md5.h>
sl@0: #ifndef OPENSSL_NO_DH
sl@0: #include <openssl/dh.h>
sl@0: #endif
sl@0: 
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libssl_wsd.h"
sl@0: #endif
sl@0: 
sl@0: #ifdef EMULATOR
sl@0: 	
sl@0: 	GET_STATIC_VAR_FROM_TLS(DTLSv1_client_method_data,d1_clnt,SSL_METHOD)
sl@0: 	
sl@0: 	#define DTLSv1_client_method_data (*GET_WSD_VAR_NAME(DTLSv1_client_method_data,d1_clnt,s)())
sl@0: 	
sl@0: #endif
sl@0: 
sl@0: static SSL_METHOD *dtls1_get_client_method(int ver);
sl@0: static int dtls1_get_hello_verify(SSL *s);
sl@0: 
sl@0: static SSL_METHOD *dtls1_get_client_method(int ver)
sl@0: 	{
sl@0: 	if (ver == DTLS1_VERSION)
sl@0: 		return(DTLSv1_client_method());
sl@0: 	else
sl@0: 		return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
sl@0: 			ssl_undefined_function,
sl@0: 			dtls1_connect,
sl@0: 			dtls1_get_client_method)
sl@0: 
sl@0: int dtls1_connect(SSL *s)
sl@0: 	{
sl@0: 	BUF_MEM *buf=NULL;
sl@0: 	unsigned long Time=(unsigned long)time(NULL),l;
sl@0: 	long num1;
sl@0: 	void (*cb)(const SSL *ssl,int type,int val)=NULL;
sl@0: 	int ret= -1;
sl@0: 	int new_state,state,skip=0;;
sl@0: 
sl@0: 	RAND_add(&Time,sizeof(Time),0);
sl@0: 	ERR_clear_error();
sl@0: 	clear_sys_error();
sl@0: 
sl@0: 	if (s->info_callback != NULL)
sl@0: 		cb=s->info_callback;
sl@0: 	else if (s->ctx->info_callback != NULL)
sl@0: 		cb=s->ctx->info_callback;
sl@0: 	
sl@0: 	s->in_handshake++;
sl@0: 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 
sl@0: 
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		state=s->state;
sl@0: 
sl@0: 		switch(s->state)
sl@0: 			{
sl@0: 		case SSL_ST_RENEGOTIATE:
sl@0: 			s->new_session=1;
sl@0: 			s->state=SSL_ST_CONNECT;
sl@0: 			s->ctx->stats.sess_connect_renegotiate++;
sl@0: 			/* break */
sl@0: 		case SSL_ST_BEFORE:
sl@0: 		case SSL_ST_CONNECT:
sl@0: 		case SSL_ST_BEFORE|SSL_ST_CONNECT:
sl@0: 		case SSL_ST_OK|SSL_ST_CONNECT:
sl@0: 
sl@0: 			s->server=0;
sl@0: 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
sl@0: 
sl@0: 			if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
sl@0: 				ret = -1;
sl@0: 				goto end;
sl@0: 				}
sl@0: 				
sl@0: 			/* s->version=SSL3_VERSION; */
sl@0: 			s->type=SSL_ST_CONNECT;
sl@0: 
sl@0: 			if (s->init_buf == NULL)
sl@0: 				{
sl@0: 				if ((buf=BUF_MEM_new()) == NULL)
sl@0: 					{
sl@0: 					ret= -1;
sl@0: 					goto end;
sl@0: 					}
sl@0: 				if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
sl@0: 					{
sl@0: 					ret= -1;
sl@0: 					goto end;
sl@0: 					}
sl@0: 				s->init_buf=buf;
sl@0: 				buf=NULL;
sl@0: 				}
sl@0: 
sl@0: 			if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
sl@0: 
sl@0: 			/* setup buffing BIO */
sl@0: 			if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
sl@0: 
sl@0: 			/* don't push the buffering BIO quite yet */
sl@0: 
sl@0: 			s->state=SSL3_ST_CW_CLNT_HELLO_A;
sl@0: 			s->ctx->stats.sess_connect++;
sl@0: 			s->init_num=0;
sl@0: 			/* mark client_random uninitialized */
sl@0: 			memset(s->s3->client_random,0,sizeof(s->s3->client_random));
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_CLNT_HELLO_A:
sl@0: 		case SSL3_ST_CW_CLNT_HELLO_B:
sl@0: 
sl@0: 			s->shutdown=0;
sl@0: 
sl@0: 			/* every DTLS ClientHello resets Finished MAC */
sl@0: 			ssl3_init_finished_mac(s);
sl@0: 
sl@0: 			ret=dtls1_client_hello(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 
sl@0: 			if ( s->d1->send_cookie)
sl@0: 				{
sl@0: 				s->state=SSL3_ST_CW_FLUSH;
sl@0: 				s->s3->tmp.next_state=SSL3_ST_CR_SRVR_HELLO_A;
sl@0: 				}
sl@0: 			else
sl@0: 				s->state=SSL3_ST_CR_SRVR_HELLO_A;
sl@0: 
sl@0: 			s->init_num=0;
sl@0: 
sl@0: 			/* turn on buffering for the next lot of output */
sl@0: 			if (s->bbio != s->wbio)
sl@0: 				s->wbio=BIO_push(s->bbio,s->wbio);
sl@0: 
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_SRVR_HELLO_A:
sl@0: 		case SSL3_ST_CR_SRVR_HELLO_B:
sl@0: 			ret=ssl3_get_server_hello(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			else
sl@0: 				{
sl@0: 				if (s->hit)
sl@0: 					s->state=SSL3_ST_CR_FINISHED_A;
sl@0: 				else
sl@0: 					s->state=DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
sl@0: 				}
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
sl@0: 		case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
sl@0: 
sl@0: 			ret = dtls1_get_hello_verify(s);
sl@0: 			if ( ret <= 0)
sl@0: 				goto end;
sl@0: 			if ( s->d1->send_cookie) /* start again, with a cookie */
sl@0: 				s->state=SSL3_ST_CW_CLNT_HELLO_A;
sl@0: 			else
sl@0: 				s->state = SSL3_ST_CR_CERT_A;
sl@0: 			s->init_num = 0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_CERT_A:
sl@0: 		case SSL3_ST_CR_CERT_B:
sl@0: 			/* Check if it is anon DH */
sl@0: 			if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
sl@0: 				{
sl@0: 				ret=ssl3_get_server_certificate(s);
sl@0: 				if (ret <= 0) goto end;
sl@0: 				}
sl@0: 			else
sl@0: 				skip=1;
sl@0: 			s->state=SSL3_ST_CR_KEY_EXCH_A;
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_KEY_EXCH_A:
sl@0: 		case SSL3_ST_CR_KEY_EXCH_B:
sl@0: 			ret=ssl3_get_key_exchange(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CR_CERT_REQ_A;
sl@0: 			s->init_num=0;
sl@0: 
sl@0: 			/* at this point we check that we have the
sl@0: 			 * required stuff from the server */
sl@0: 			if (!ssl3_check_cert_and_algorithm(s))
sl@0: 				{
sl@0: 				ret= -1;
sl@0: 				goto end;
sl@0: 				}
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_CERT_REQ_A:
sl@0: 		case SSL3_ST_CR_CERT_REQ_B:
sl@0: 			ret=ssl3_get_certificate_request(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CR_SRVR_DONE_A;
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_SRVR_DONE_A:
sl@0: 		case SSL3_ST_CR_SRVR_DONE_B:
sl@0: 			ret=ssl3_get_server_done(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			if (s->s3->tmp.cert_req)
sl@0: 				s->state=SSL3_ST_CW_CERT_A;
sl@0: 			else
sl@0: 				s->state=SSL3_ST_CW_KEY_EXCH_A;
sl@0: 			s->init_num=0;
sl@0: 
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_CERT_A:
sl@0: 		case SSL3_ST_CW_CERT_B:
sl@0: 		case SSL3_ST_CW_CERT_C:
sl@0: 		case SSL3_ST_CW_CERT_D:
sl@0: 			ret=dtls1_send_client_certificate(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CW_KEY_EXCH_A;
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_KEY_EXCH_A:
sl@0: 		case SSL3_ST_CW_KEY_EXCH_B:
sl@0: 			ret=dtls1_send_client_key_exchange(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			l=s->s3->tmp.new_cipher->algorithms;
sl@0: 			/* EAY EAY EAY need to check for DH fix cert
sl@0: 			 * sent back */
sl@0: 			/* For TLS, cert_req is set to 2, so a cert chain
sl@0: 			 * of nothing is sent, but no verify packet is sent */
sl@0: 			if (s->s3->tmp.cert_req == 1)
sl@0: 				{
sl@0: 				s->state=SSL3_ST_CW_CERT_VRFY_A;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s->state=SSL3_ST_CW_CHANGE_A;
sl@0: 				s->s3->change_cipher_spec=0;
sl@0: 				}
sl@0: 
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_CERT_VRFY_A:
sl@0: 		case SSL3_ST_CW_CERT_VRFY_B:
sl@0: 			ret=dtls1_send_client_verify(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CW_CHANGE_A;
sl@0: 			s->init_num=0;
sl@0: 			s->s3->change_cipher_spec=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_CHANGE_A:
sl@0: 		case SSL3_ST_CW_CHANGE_B:
sl@0: 			ret=dtls1_send_change_cipher_spec(s,
sl@0: 				SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CW_FINISHED_A;
sl@0: 			s->init_num=0;
sl@0: 
sl@0: 			s->session->cipher=s->s3->tmp.new_cipher;
sl@0: #ifdef OPENSSL_NO_COMP
sl@0: 			s->session->compress_meth=0;
sl@0: #else
sl@0: 			if (s->s3->tmp.new_compression == NULL)
sl@0: 				s->session->compress_meth=0;
sl@0: 			else
sl@0: 				s->session->compress_meth=
sl@0: 					s->s3->tmp.new_compression->id;
sl@0: #endif
sl@0: 			if (!s->method->ssl3_enc->setup_key_block(s))
sl@0: 				{
sl@0: 				ret= -1;
sl@0: 				goto end;
sl@0: 				}
sl@0: 
sl@0: 			if (!s->method->ssl3_enc->change_cipher_state(s,
sl@0: 				SSL3_CHANGE_CIPHER_CLIENT_WRITE))
sl@0: 				{
sl@0: 				ret= -1;
sl@0: 				goto end;
sl@0: 				}
sl@0: 			
sl@0: 			dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_FINISHED_A:
sl@0: 		case SSL3_ST_CW_FINISHED_B:
sl@0: 			ret=dtls1_send_finished(s,
sl@0: 				SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
sl@0: 				s->method->ssl3_enc->client_finished_label,
sl@0: 				s->method->ssl3_enc->client_finished_label_len);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->state=SSL3_ST_CW_FLUSH;
sl@0: 
sl@0: 			/* clear flags */
sl@0: 			s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
sl@0: 			if (s->hit)
sl@0: 				{
sl@0: 				s->s3->tmp.next_state=SSL_ST_OK;
sl@0: 				if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
sl@0: 					{
sl@0: 					s->state=SSL_ST_OK;
sl@0: 					s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
sl@0: 					s->s3->delay_buf_pop_ret=0;
sl@0: 					}
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
sl@0: 				}
sl@0: 			s->init_num=0;
sl@0: 			/* mark client_random uninitialized */
sl@0: 			memset (s->s3->client_random,0,sizeof(s->s3->client_random));
sl@0: 
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CR_FINISHED_A:
sl@0: 		case SSL3_ST_CR_FINISHED_B:
sl@0: 
sl@0: 			ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
sl@0: 				SSL3_ST_CR_FINISHED_B);
sl@0: 			if (ret <= 0) goto end;
sl@0: 
sl@0: 			if (s->hit)
sl@0: 				s->state=SSL3_ST_CW_CHANGE_A;
sl@0: 			else
sl@0: 				s->state=SSL_ST_OK;
sl@0: 			s->init_num=0;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL3_ST_CW_FLUSH:
sl@0: 			/* number of bytes to be flushed */
sl@0: 			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
sl@0: 			if (num1 > 0)
sl@0: 				{
sl@0: 				s->rwstate=SSL_WRITING;
sl@0: 				num1=BIO_flush(s->wbio);
sl@0: 				if (num1 <= 0) { ret= -1; goto end; }
sl@0: 				s->rwstate=SSL_NOTHING;
sl@0: 				}
sl@0: 
sl@0: 			s->state=s->s3->tmp.next_state;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL_ST_OK:
sl@0: 			/* clean a few things up */
sl@0: 			ssl3_cleanup_key_block(s);
sl@0: 
sl@0: #if 0
sl@0: 			if (s->init_buf != NULL)
sl@0: 				{
sl@0: 				BUF_MEM_free(s->init_buf);
sl@0: 				s->init_buf=NULL;
sl@0: 				}
sl@0: #endif
sl@0: 
sl@0: 			/* If we are not 'joining' the last two packets,
sl@0: 			 * remove the buffering now */
sl@0: 			if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
sl@0: 				ssl_free_wbio_buffer(s);
sl@0: 			/* else do it later in ssl3_write */
sl@0: 
sl@0: 			s->init_num=0;
sl@0: 			s->new_session=0;
sl@0: 
sl@0: 			ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
sl@0: 			if (s->hit) s->ctx->stats.sess_hit++;
sl@0: 
sl@0: 			ret=1;
sl@0: 			/* s->server=0; */
sl@0: 			s->handshake_func=dtls1_connect;
sl@0: 			s->ctx->stats.sess_connect_good++;
sl@0: 
sl@0: 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
sl@0: 
sl@0: 			/* done with handshaking */
sl@0: 			s->d1->handshake_read_seq  = 0;
sl@0: 			goto end;
sl@0: 			/* break; */
sl@0: 			
sl@0: 		default:
sl@0: 			SSLerr(SSL_F_DTLS1_CONNECT,SSL_R_UNKNOWN_STATE);
sl@0: 			ret= -1;
sl@0: 			goto end;
sl@0: 			/* break; */
sl@0: 			}
sl@0: 
sl@0: 		/* did we do anything */
sl@0: 		if (!s->s3->tmp.reuse_message && !skip)
sl@0: 			{
sl@0: 			if (s->debug)
sl@0: 				{
sl@0: 				if ((ret=BIO_flush(s->wbio)) <= 0)
sl@0: 					goto end;
sl@0: 				}
sl@0: 
sl@0: 			if ((cb != NULL) && (s->state != state))
sl@0: 				{
sl@0: 				new_state=s->state;
sl@0: 				s->state=state;
sl@0: 				cb(s,SSL_CB_CONNECT_LOOP,1);
sl@0: 				s->state=new_state;
sl@0: 				}
sl@0: 			}
sl@0: 		skip=0;
sl@0: 		}
sl@0: end:
sl@0: 	s->in_handshake--;
sl@0: 	if (buf != NULL)
sl@0: 		BUF_MEM_free(buf);
sl@0: 	if (cb != NULL)
sl@0: 		cb(s,SSL_CB_CONNECT_EXIT,ret);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: int dtls1_client_hello(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *buf;
sl@0: 	unsigned char *p,*d;
sl@0: 	unsigned int i,j;
sl@0: 	unsigned long Time,l;
sl@0: 	SSL_COMP *comp;
sl@0: 
sl@0: 	buf=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
sl@0: 		{
sl@0: 		if ((s->session == NULL) ||
sl@0: 			(s->session->ssl_version != s->version) ||
sl@0: 			(s->session->not_resumable))
sl@0: 			{
sl@0: 			if (!ssl_get_new_session(s,0))
sl@0: 				goto err;
sl@0: 			}
sl@0: 		/* else use the pre-loaded session */
sl@0: 
sl@0: 		p=s->s3->client_random;
sl@0: 		/* if client_random is initialized, reuse it, we are
sl@0: 		 * required to use same upon reply to HelloVerify */
sl@0: 		for (i=0;p[i]=='\0' && i<sizeof(s->s3->client_random);i++) ;
sl@0: 		if (i==sizeof(s->s3->client_random))
sl@0: 			{
sl@0: 			Time=(unsigned long)time(NULL);	/* Time */
sl@0: 			l2n(Time,p);
sl@0: 			RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4);
sl@0: 			}
sl@0: 
sl@0: 		/* Do the message type and length last */
sl@0: 		d=p= &(buf[DTLS1_HM_HEADER_LENGTH]);
sl@0: 
sl@0: 		*(p++)=s->version>>8;
sl@0: 		*(p++)=s->version&0xff;
sl@0: 		s->client_version=s->version;
sl@0: 
sl@0: 		/* Random stuff */
sl@0: 		memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
sl@0: 		p+=SSL3_RANDOM_SIZE;
sl@0: 
sl@0: 		/* Session ID */
sl@0: 		if (s->new_session)
sl@0: 			i=0;
sl@0: 		else
sl@0: 			i=s->session->session_id_length;
sl@0: 		*(p++)=i;
sl@0: 		if (i != 0)
sl@0: 			{
sl@0: 			if (i > sizeof s->session->session_id)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			memcpy(p,s->session->session_id,i);
sl@0: 			p+=i;
sl@0: 			}
sl@0: 		
sl@0: 		/* cookie stuff */
sl@0: 		if ( s->d1->cookie_len > sizeof(s->d1->cookie))
sl@0: 			{
sl@0: 			SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		*(p++) = s->d1->cookie_len;
sl@0: 		memcpy(p, s->d1->cookie, s->d1->cookie_len);
sl@0: 		p += s->d1->cookie_len;
sl@0: 
sl@0: 		/* Ciphers supported */
sl@0: 		i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
sl@0: 		if (i == 0)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_DTLS1_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		s2n(i,p);
sl@0: 		p+=i;
sl@0: 
sl@0: 		/* COMPRESSION */
sl@0: 		if (s->ctx->comp_methods == NULL)
sl@0: 			j=0;
sl@0: 		else
sl@0: 			j=sk_SSL_COMP_num(s->ctx->comp_methods);
sl@0: 		*(p++)=1+j;
sl@0: 		for (i=0; i<j; i++)
sl@0: 			{
sl@0: 			comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
sl@0: 			*(p++)=comp->id;
sl@0: 			}
sl@0: 		*(p++)=0; /* Add the NULL method */
sl@0: 		
sl@0: 		l=(p-d);
sl@0: 		d=buf;
sl@0: 
sl@0: 		d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
sl@0: 
sl@0: 		s->state=SSL3_ST_CW_CLNT_HELLO_B;
sl@0: 		/* number of bytes to write */
sl@0: 		s->init_num=p-buf;
sl@0: 		s->init_off=0;
sl@0: 
sl@0: 		/* buffer the message to handle re-xmits */
sl@0: 		dtls1_buffer_message(s, 0);
sl@0: 		}
sl@0: 
sl@0: 	/* SSL3_ST_CW_CLNT_HELLO_B */
sl@0: 	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
sl@0: err:
sl@0: 	return(-1);
sl@0: 	}
sl@0: 
sl@0: static int dtls1_get_hello_verify(SSL *s)
sl@0: 	{
sl@0: 	int n, al, ok = 0;
sl@0: 	unsigned char *data;
sl@0: 	unsigned int cookie_len;
sl@0: 
sl@0: 	n=s->method->ssl_get_message(s,
sl@0: 		DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
sl@0: 		DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
sl@0: 		-1,
sl@0: 		s->max_cert_list,
sl@0: 		&ok);
sl@0: 
sl@0: 	if (!ok) return((int)n);
sl@0: 
sl@0: 	if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST)
sl@0: 		{
sl@0: 		s->d1->send_cookie = 0;
sl@0: 		s->s3->tmp.reuse_message=1;
sl@0: 		return(1);
sl@0: 		}
sl@0: 
sl@0: 	data = (unsigned char *)s->init_msg;
sl@0: 
sl@0: 	if ((data[0] != (s->version>>8)) || (data[1] != (s->version&0xff)))
sl@0: 		{
sl@0: 		SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY,SSL_R_WRONG_SSL_VERSION);
sl@0: 		s->version=(s->version&0xff00)|data[1];
sl@0: 		al = SSL_AD_PROTOCOL_VERSION;
sl@0: 		goto f_err;
sl@0: 		}
sl@0: 	data+=2;
sl@0: 
sl@0: 	cookie_len = *(data++);
sl@0: 	if ( cookie_len > sizeof(s->d1->cookie))
sl@0: 		{
sl@0: 		al=SSL_AD_ILLEGAL_PARAMETER;
sl@0: 		goto f_err;
sl@0: 		}
sl@0: 
sl@0: 	memcpy(s->d1->cookie, data, cookie_len);
sl@0: 	s->d1->cookie_len = cookie_len;
sl@0: 
sl@0: 	s->d1->send_cookie = 1;
sl@0: 	return 1;
sl@0: 
sl@0: f_err:
sl@0: 	ssl3_send_alert(s, SSL3_AL_FATAL, al);
sl@0: 	return -1;
sl@0: 	}
sl@0: 
sl@0: int dtls1_send_client_key_exchange(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p,*d;
sl@0: 	int n;
sl@0: 	unsigned long l;
sl@0: #ifndef OPENSSL_NO_RSA
sl@0: 	unsigned char *q;
sl@0: 	EVP_PKEY *pkey=NULL;
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_KRB5
sl@0:         KSSL_ERR kssl_err;
sl@0: #endif /* OPENSSL_NO_KRB5 */
sl@0: 
sl@0: 	if (s->state == SSL3_ST_CW_KEY_EXCH_A)
sl@0: 		{
sl@0: 		d=(unsigned char *)s->init_buf->data;
sl@0: 		p= &(d[DTLS1_HM_HEADER_LENGTH]);
sl@0: 
sl@0: 		l=s->s3->tmp.new_cipher->algorithms;
sl@0: 
sl@0:                 /* Fool emacs indentation */
sl@0:                 if (0) {}
sl@0: #ifndef OPENSSL_NO_RSA
sl@0: 		else if (l & SSL_kRSA)
sl@0: 			{
sl@0: 			RSA *rsa;
sl@0: 			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
sl@0: 
sl@0: 			if (s->session->sess_cert->peer_rsa_tmp != NULL)
sl@0: 				rsa=s->session->sess_cert->peer_rsa_tmp;
sl@0: 			else
sl@0: 				{
sl@0: 				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
sl@0: 				if ((pkey == NULL) ||
sl@0: 					(pkey->type != EVP_PKEY_RSA) ||
sl@0: 					(pkey->pkey.rsa == NULL))
sl@0: 					{
sl@0: 					SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
sl@0: 					goto err;
sl@0: 					}
sl@0: 				rsa=pkey->pkey.rsa;
sl@0: 				EVP_PKEY_free(pkey);
sl@0: 				}
sl@0: 				
sl@0: 			tmp_buf[0]=s->client_version>>8;
sl@0: 			tmp_buf[1]=s->client_version&0xff;
sl@0: 			if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
sl@0: 					goto err;
sl@0: 
sl@0: 			s->session->master_key_length=sizeof tmp_buf;
sl@0: 
sl@0: 			q=p;
sl@0: 			/* Fix buf for TLS and [incidentally] DTLS */
sl@0: 			if (s->version > SSL3_VERSION)
sl@0: 				p+=2;
sl@0: 			n=RSA_public_encrypt(sizeof tmp_buf,
sl@0: 				tmp_buf,p,rsa,RSA_PKCS1_PADDING);
sl@0: #ifdef PKCS1_CHECK
sl@0: 			if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
sl@0: 			if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
sl@0: #endif
sl@0: 			if (n <= 0)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
sl@0: 				goto err;
sl@0: 				}
sl@0: 
sl@0: 			/* Fix buf for TLS and [incidentally] DTLS */
sl@0: 			if (s->version > SSL3_VERSION)
sl@0: 				{
sl@0: 				s2n(n,q);
sl@0: 				n+=2;
sl@0: 				}
sl@0: 
sl@0: 			s->session->master_key_length=
sl@0: 				s->method->ssl3_enc->generate_master_secret(s,
sl@0: 					s->session->master_key,
sl@0: 					tmp_buf,sizeof tmp_buf);
sl@0: 			OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
sl@0: 			}
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_KRB5
sl@0: 		else if (l & SSL_kKRB5)
sl@0:                         {
sl@0:                         krb5_error_code	krb5rc;
sl@0:                         KSSL_CTX	*kssl_ctx = s->kssl_ctx;
sl@0:                         /*  krb5_data	krb5_ap_req;  */
sl@0:                         krb5_data	*enc_ticket;
sl@0:                         krb5_data	authenticator, *authp = NULL;
sl@0: 			EVP_CIPHER_CTX	ciph_ctx;
sl@0: 			EVP_CIPHER	*enc = NULL;
sl@0: 			unsigned char	iv[EVP_MAX_IV_LENGTH];
sl@0: 			unsigned char	tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
sl@0: 			unsigned char	epms[SSL_MAX_MASTER_KEY_LENGTH 
sl@0: 						+ EVP_MAX_IV_LENGTH];
sl@0: 			int 		padl, outl = sizeof(epms);
sl@0: 
sl@0: 			EVP_CIPHER_CTX_init(&ciph_ctx);
sl@0: 
sl@0: #ifdef KSSL_DEBUG
sl@0:                         printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
sl@0:                                 l, SSL_kKRB5);
sl@0: #endif	/* KSSL_DEBUG */
sl@0: 
sl@0: 			authp = NULL;
sl@0: #ifdef KRB5SENDAUTH
sl@0: 			if (KRB5SENDAUTH)  authp = &authenticator;
sl@0: #endif	/* KRB5SENDAUTH */
sl@0: 
sl@0:                         krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
sl@0: 				&kssl_err);
sl@0: 			enc = kssl_map_enc(kssl_ctx->enctype);
sl@0:                         if (enc == NULL)
sl@0:                             goto err;
sl@0: #ifdef KSSL_DEBUG
sl@0:                         {
sl@0:                         printf("kssl_cget_tkt rtn %d\n", krb5rc);
sl@0:                         if (krb5rc && kssl_err.text)
sl@0: 			  printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
sl@0:                         }
sl@0: #endif	/* KSSL_DEBUG */
sl@0: 
sl@0:                         if (krb5rc)
sl@0:                                 {
sl@0:                                 ssl3_send_alert(s,SSL3_AL_FATAL,
sl@0: 						SSL_AD_HANDSHAKE_FAILURE);
sl@0:                                 SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
sl@0: 						kssl_err.reason);
sl@0:                                 goto err;
sl@0:                                 }
sl@0: 
sl@0: 			/*  20010406 VRS - Earlier versions used KRB5 AP_REQ
sl@0: 			**  in place of RFC 2712 KerberosWrapper, as in:
sl@0: 			**
sl@0:                         **  Send ticket (copy to *p, set n = length)
sl@0:                         **  n = krb5_ap_req.length;
sl@0:                         **  memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
sl@0:                         **  if (krb5_ap_req.data)  
sl@0:                         **    kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
sl@0:                         **
sl@0: 			**  Now using real RFC 2712 KerberosWrapper
sl@0: 			**  (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
sl@0: 			**  Note: 2712 "opaque" types are here replaced
sl@0: 			**  with a 2-byte length followed by the value.
sl@0: 			**  Example:
sl@0: 			**  KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
sl@0: 			**  Where "xx xx" = length bytes.  Shown here with
sl@0: 			**  optional authenticator omitted.
sl@0: 			*/
sl@0: 
sl@0: 			/*  KerberosWrapper.Ticket		*/
sl@0: 			s2n(enc_ticket->length,p);
sl@0: 			memcpy(p, enc_ticket->data, enc_ticket->length);
sl@0: 			p+= enc_ticket->length;
sl@0: 			n = enc_ticket->length + 2;
sl@0: 
sl@0: 			/*  KerberosWrapper.Authenticator	*/
sl@0: 			if (authp  &&  authp->length)  
sl@0: 				{
sl@0: 				s2n(authp->length,p);
sl@0: 				memcpy(p, authp->data, authp->length);
sl@0: 				p+= authp->length;
sl@0: 				n+= authp->length + 2;
sl@0: 				
sl@0: 				free(authp->data);
sl@0: 				authp->data = NULL;
sl@0: 				authp->length = 0;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s2n(0,p);/*  null authenticator length	*/
sl@0: 				n+=2;
sl@0: 				}
sl@0:  
sl@0: 			if (RAND_bytes(tmp_buf,sizeof tmp_buf) <= 0)
sl@0: 			    goto err;
sl@0: 
sl@0: 			/*  20010420 VRS.  Tried it this way; failed.
sl@0: 			**	EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
sl@0: 			**	EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
sl@0: 			**				kssl_ctx->length);
sl@0: 			**	EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
sl@0: 			*/
sl@0: 
sl@0: 			memset(iv, 0, sizeof iv);  /* per RFC 1510 */
sl@0: 			EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
sl@0: 				kssl_ctx->key,iv);
sl@0: 			EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
sl@0: 				sizeof tmp_buf);
sl@0: 			EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
sl@0: 			outl += padl;
sl@0: 			if (outl > sizeof epms)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			EVP_CIPHER_CTX_cleanup(&ciph_ctx);
sl@0: 
sl@0: 			/*  KerberosWrapper.EncryptedPreMasterSecret	*/
sl@0: 			s2n(outl,p);
sl@0: 			memcpy(p, epms, outl);
sl@0: 			p+=outl;
sl@0: 			n+=outl + 2;
sl@0: 
sl@0:                         s->session->master_key_length=
sl@0:                                 s->method->ssl3_enc->generate_master_secret(s,
sl@0: 					s->session->master_key,
sl@0: 					tmp_buf, sizeof tmp_buf);
sl@0: 
sl@0: 			OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
sl@0: 			OPENSSL_cleanse(epms, outl);
sl@0:                         }
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_DH
sl@0: 		else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
sl@0: 			{
sl@0: 			DH *dh_srvr,*dh_clnt;
sl@0: 
sl@0: 			if (s->session->sess_cert->peer_dh_tmp != NULL)
sl@0: 				dh_srvr=s->session->sess_cert->peer_dh_tmp;
sl@0: 			else
sl@0: 				{
sl@0: 				/* we get them from the cert */
sl@0: 				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			
sl@0: 			/* generate a new random key */
sl@0: 			if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			if (!DH_generate_key(dh_clnt))
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
sl@0: 				goto err;
sl@0: 				}
sl@0: 
sl@0: 			/* use the 'p' output buffer for the DH key, but
sl@0: 			 * make sure to clear it out afterwards */
sl@0: 
sl@0: 			n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
sl@0: 
sl@0: 			if (n <= 0)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
sl@0: 				goto err;
sl@0: 				}
sl@0: 
sl@0: 			/* generate master key from the result */
sl@0: 			s->session->master_key_length=
sl@0: 				s->method->ssl3_enc->generate_master_secret(s,
sl@0: 					s->session->master_key,p,n);
sl@0: 			/* clean up */
sl@0: 			memset(p,0,n);
sl@0: 
sl@0: 			/* send off the data */
sl@0: 			n=BN_num_bytes(dh_clnt->pub_key);
sl@0: 			s2n(n,p);
sl@0: 			BN_bn2bin(dh_clnt->pub_key,p);
sl@0: 			n+=2;
sl@0: 
sl@0: 			DH_free(dh_clnt);
sl@0: 
sl@0: 			/* perhaps clean things up a bit EAY EAY EAY EAY*/
sl@0: 			}
sl@0: #endif
sl@0: 		else
sl@0: 			{
sl@0: 			ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
sl@0: 			SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		
sl@0: 		d = dtls1_set_message_header(s, d,
sl@0: 		SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
sl@0: 		/*
sl@0: 		 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
sl@0: 		 l2n3(n,d);
sl@0: 		 l2n(s->d1->handshake_write_seq,d);
sl@0: 		 s->d1->handshake_write_seq++;
sl@0: 		*/
sl@0: 		
sl@0: 		s->state=SSL3_ST_CW_KEY_EXCH_B;
sl@0: 		/* number of bytes to write */
sl@0: 		s->init_num=n+DTLS1_HM_HEADER_LENGTH;
sl@0: 		s->init_off=0;
sl@0: 
sl@0: 		/* buffer the message to handle re-xmits */
sl@0: 		dtls1_buffer_message(s, 0);
sl@0: 		}
sl@0: 	
sl@0: 	/* SSL3_ST_CW_KEY_EXCH_B */
sl@0: 	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
sl@0: err:
sl@0: 	return(-1);
sl@0: 	}
sl@0: 
sl@0: int dtls1_send_client_verify(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p,*d;
sl@0: 	unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
sl@0: 	EVP_PKEY *pkey;
sl@0: #ifndef OPENSSL_NO_RSA
sl@0: 	unsigned u=0;
sl@0: #endif
sl@0: 	unsigned long n;
sl@0: #ifndef OPENSSL_NO_DSA
sl@0: 	int j;
sl@0: #endif
sl@0: 
sl@0: 	if (s->state == SSL3_ST_CW_CERT_VRFY_A)
sl@0: 		{
sl@0: 		d=(unsigned char *)s->init_buf->data;
sl@0: 		p= &(d[DTLS1_HM_HEADER_LENGTH]);
sl@0: 		pkey=s->cert->key->privatekey;
sl@0: 
sl@0: 		s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2),
sl@0: 			&(data[MD5_DIGEST_LENGTH]));
sl@0: 
sl@0: #ifndef OPENSSL_NO_RSA
sl@0: 		if (pkey->type == EVP_PKEY_RSA)
sl@0: 			{
sl@0: 			s->method->ssl3_enc->cert_verify_mac(s,
sl@0: 				&(s->s3->finish_dgst1),&(data[0]));
sl@0: 			if (RSA_sign(NID_md5_sha1, data,
sl@0: 					 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
sl@0: 					&(p[2]), &u, pkey->pkey.rsa) <= 0 )
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			s2n(u,p);
sl@0: 			n=u+2;
sl@0: 			}
sl@0: 		else
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_DSA
sl@0: 			if (pkey->type == EVP_PKEY_DSA)
sl@0: 			{
sl@0: 			if (!DSA_sign(pkey->save_type,
sl@0: 				&(data[MD5_DIGEST_LENGTH]),
sl@0: 				SHA_DIGEST_LENGTH,&(p[2]),
sl@0: 				(unsigned int *)&j,pkey->pkey.dsa))
sl@0: 				{
sl@0: 				SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			s2n(j,p);
sl@0: 			n=j+2;
sl@0: 			}
sl@0: 		else
sl@0: #endif
sl@0: 			{
sl@0: 			SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		d = dtls1_set_message_header(s, d,
sl@0: 			SSL3_MT_CERTIFICATE_VERIFY, n, 0, n) ;
sl@0: 
sl@0: 		s->init_num=(int)n+DTLS1_HM_HEADER_LENGTH;
sl@0: 		s->init_off=0;
sl@0: 
sl@0: 		/* buffer the message to handle re-xmits */
sl@0: 		dtls1_buffer_message(s, 0);
sl@0: 
sl@0: 		s->state = SSL3_ST_CW_CERT_VRFY_B;
sl@0: 		}
sl@0: 
sl@0: 	/* s->state = SSL3_ST_CW_CERT_VRFY_B */
sl@0: 	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
sl@0: err:
sl@0: 	return(-1);
sl@0: 	}
sl@0: 
sl@0: int dtls1_send_client_certificate(SSL *s)
sl@0: 	{
sl@0: 	X509 *x509=NULL;
sl@0: 	EVP_PKEY *pkey=NULL;
sl@0: 	int i;
sl@0: 	unsigned long l;
sl@0: 
sl@0: 	if (s->state ==	SSL3_ST_CW_CERT_A)
sl@0: 		{
sl@0: 		if ((s->cert == NULL) ||
sl@0: 			(s->cert->key->x509 == NULL) ||
sl@0: 			(s->cert->key->privatekey == NULL))
sl@0: 			s->state=SSL3_ST_CW_CERT_B;
sl@0: 		else
sl@0: 			s->state=SSL3_ST_CW_CERT_C;
sl@0: 		}
sl@0: 
sl@0: 	/* We need to get a client cert */
sl@0: 	if (s->state == SSL3_ST_CW_CERT_B)
sl@0: 		{
sl@0: 		/* If we get an error, we need to
sl@0: 		 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
sl@0: 		 * We then get retied later */
sl@0: 		i=0;
sl@0: 		if (s->ctx->client_cert_cb != NULL)
sl@0: 			i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
sl@0: 		if (i < 0)
sl@0: 			{
sl@0: 			s->rwstate=SSL_X509_LOOKUP;
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		s->rwstate=SSL_NOTHING;
sl@0: 		if ((i == 1) && (pkey != NULL) && (x509 != NULL))
sl@0: 			{
sl@0: 			s->state=SSL3_ST_CW_CERT_B;
sl@0: 			if (	!SSL_use_certificate(s,x509) ||
sl@0: 				!SSL_use_PrivateKey(s,pkey))
sl@0: 				i=0;
sl@0: 			}
sl@0: 		else if (i == 1)
sl@0: 			{
sl@0: 			i=0;
sl@0: 			SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
sl@0: 			}
sl@0: 
sl@0: 		if (x509 != NULL) X509_free(x509);
sl@0: 		if (pkey != NULL) EVP_PKEY_free(pkey);
sl@0: 		if (i == 0)
sl@0: 			{
sl@0: 			if (s->version == SSL3_VERSION)
sl@0: 				{
sl@0: 				s->s3->tmp.cert_req=0;
sl@0: 				ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
sl@0: 				return(1);
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s->s3->tmp.cert_req=2;
sl@0: 				}
sl@0: 			}
sl@0: 
sl@0: 		/* Ok, we have a cert */
sl@0: 		s->state=SSL3_ST_CW_CERT_C;
sl@0: 		}
sl@0: 
sl@0: 	if (s->state == SSL3_ST_CW_CERT_C)
sl@0: 		{
sl@0: 		s->state=SSL3_ST_CW_CERT_D;
sl@0: 		l=dtls1_output_cert_chain(s,
sl@0: 			(s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
sl@0: 		s->init_num=(int)l;
sl@0: 		s->init_off=0;
sl@0: 
sl@0: 		/* set header called by dtls1_output_cert_chain() */
sl@0: 
sl@0: 		/* buffer the message to handle re-xmits */
sl@0: 		dtls1_buffer_message(s, 0);
sl@0: 		}
sl@0: 	/* SSL3_ST_CW_CERT_D */
sl@0: 	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
sl@0: 	}
sl@0: 
sl@0: