/* ssl/d1_lib.c */

 /* 

  * DTLS implementation written by Nagendra Modadugu

  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  

  */

 /* ====================================================================

  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  *

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer. 

  *

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in

  *    the documentation and/or other materials provided with the

  *    distribution.

  *

  * 3. All advertising materials mentioning features or use of this

  *    software must display the following acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

  *

  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

  *    endorse or promote products derived from this software without

  *    prior written permission. For written permission, please contact

  *    openssl-core@OpenSSL.org.

  *

  * 5. Products derived from this software may not be called "OpenSSL"

  *    nor may "OpenSSL" appear in their names without prior written

  *    permission of the OpenSSL Project.

  *

  * 6. Redistributions of any form whatsoever must retain the following

  *    acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

  *

  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  * ====================================================================

  *

  * This product includes cryptographic software written by Eric Young

  * (eay@cryptsoft.com).  This product includes software written by Tim

  * Hudson (tjh@cryptsoft.com).

  *

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include <openssl/objects.h>

 #include "ssl_locl.h"

 const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT;

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libssl_wsd.h"

 #endif 

 #ifdef EMULATOR

 	GET_STATIC_VAR_FROM_TLS(dtlsv1_base_method_data,d1_lib,SSL_METHOD)

 	#define dtlsv1_base_method_data (*GET_WSD_VAR_NAME(dtlsv1_base_method_data,d1_lib,s)())

 	GET_GLOBAL_VAR_FROM_TLS(DTLSv1_enc_data,d1_lib,SSL3_ENC_METHOD)

 	#define DTLSv1_enc_data (GET_WSD_VAR_NAME(DTLSv1_enc_data,d1_lib,g)())

 #endif

 #ifndef EMULATOR

 SSL3_ENC_METHOD DTLSv1_enc_data={

 #else

 const SSL3_ENC_METHOD temp_DTLSv1_enc_data={

 #endif

     dtls1_enc,

 	tls1_mac,

 	tls1_setup_key_block,

 	tls1_generate_master_secret,

 	tls1_change_cipher_state,

 	tls1_final_finish_mac,

 	TLS1_FINISH_MAC_LENGTH,

 	tls1_cert_verify_mac,

 	TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,

 	TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,

 	tls1_alert_code,

 	};

 long dtls1_default_timeout(void)

 	{

 	/* 2 hours, the 24 hours mentioned in the DTLSv1 spec

 	 * is way too long for http, the cache would over fill */

 	return(60*60*2);

 	}

 IMPLEMENT_dtls1_meth_func(dtlsv1_base_method,

 			ssl_undefined_function,

 			ssl_undefined_function,

 			ssl_bad_method)

 int dtls1_new(SSL *s)

 	{

 	DTLS1_STATE *d1;

 	if (!ssl3_new(s)) return(0);

 	if ((d1=OPENSSL_malloc(sizeof *d1)) == NULL) return (0);

 	memset(d1,0, sizeof *d1);

 	/* d1->handshake_epoch=0; */

 #if defined(OPENSSL_SYS_VMS) || defined(VMS_TEST)

 	d1->bitmap.length=64;

 #else

 	d1->bitmap.length=sizeof(d1->bitmap.map) * 8;

 #endif

 	pq_64bit_init(&(d1->bitmap.map));

 	pq_64bit_init(&(d1->bitmap.max_seq_num));

 	pq_64bit_init(&(d1->next_bitmap.map));

 	pq_64bit_init(&(d1->next_bitmap.max_seq_num));

 	d1->unprocessed_rcds.q=pqueue_new();

 	d1->processed_rcds.q=pqueue_new();

 	d1->buffered_messages = pqueue_new();

 	d1->sent_messages=pqueue_new();

 	if ( s->server)

 		{

 		d1->cookie_len = sizeof(s->d1->cookie);

 		}

 	if( ! d1->unprocessed_rcds.q || ! d1->processed_rcds.q 

         || ! d1->buffered_messages || ! d1->sent_messages)

 		{

         if ( d1->unprocessed_rcds.q) pqueue_free(d1->unprocessed_rcds.q);

         if ( d1->processed_rcds.q) pqueue_free(d1->processed_rcds.q);

         if ( d1->buffered_messages) pqueue_free(d1->buffered_messages);

 		if ( d1->sent_messages) pqueue_free(d1->sent_messages);

 		OPENSSL_free(d1);

 		return (0);

 		}

 	s->d1=d1;

 	s->method->ssl_clear(s);

 	return(1);

 	}

 void dtls1_free(SSL *s)

 	{

     pitem *item = NULL;

     hm_fragment *frag = NULL;

 	ssl3_free(s);

     while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL)

         {

         OPENSSL_free(item->data);

         pitem_free(item);

         }

     pqueue_free(s->d1->unprocessed_rcds.q);

     while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL)

         {

         OPENSSL_free(item->data);

         pitem_free(item);

         }

     pqueue_free(s->d1->processed_rcds.q);

     while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL)

         {

         frag = (hm_fragment *)item->data;

         OPENSSL_free(frag->fragment);

         OPENSSL_free(frag);

         pitem_free(item);

         }

     pqueue_free(s->d1->buffered_messages);

     while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL)

         {

         frag = (hm_fragment *)item->data;

         OPENSSL_free(frag->fragment);

         OPENSSL_free(frag);

         pitem_free(item);

         }

 	pqueue_free(s->d1->sent_messages);

 	pq_64bit_free(&(s->d1->bitmap.map));

 	pq_64bit_free(&(s->d1->bitmap.max_seq_num));

 	pq_64bit_free(&(s->d1->next_bitmap.map));

 	pq_64bit_free(&(s->d1->next_bitmap.max_seq_num));

 	OPENSSL_free(s->d1);

 	}

 void dtls1_clear(SSL *s)

 	{

 	ssl3_clear(s);

 	s->version=DTLS1_VERSION;

 	}

 /*

  * As it's impossible to use stream ciphers in "datagram" mode, this

  * simple filter is designed to disengage them in DTLS. Unfortunately

  * there is no universal way to identify stream SSL_CIPHER, so we have

  * to explicitly list their SSL_* codes. Currently RC4 is the only one

  * available, but if new ones emerge, they will have to be added...

  */

 SSL_CIPHER *dtls1_get_cipher(unsigned int u)

 	{

 	SSL_CIPHER *ciph = ssl3_get_cipher(u);

 	if (ciph != NULL)

 		{

 		if ((ciph->algorithms&SSL_ENC_MASK) == SSL_RC4)

 			return NULL;

 		}

 	return ciph;

 	}