/* 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;

	}