/*
 * embedded IPsec
 * Copyright (c) 2003 Niklaus Schild and Christian Scheurer, HTI Biel/Bienne
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 */

/** @file md5.h
 *  @brief Header of MD5 Message-Digest Algorithm
 *
 *  @author Niklaus Schild <n.schild@gmx.ch>
 *
 * This document is part of <EM>embedded IPsec<BR>
 * Copyright (c) 2003 Niklaus Schild and Christian Scheurer, HTI Biel/Bienne<BR>
 * All rights reserved.<BR>
 * This file contains code from the OpenSSL Project<BR> 
 * portions Copyright (c) 1998-2003 OpenSSL (www.openssl.org)
 *</EM><HR>
 */

#ifndef __IPSEC_MD5_H__
#define __IPSEC_MD5_H__

#include "ipsec_types.h"

#if LWIP_IPSEC

/**
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 * ! MD5_LONG has to be at least 32 bits wide. If it's wider, then !
 * ! MD5_LONG_LOG2 has to be defined along.			   !
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 */

#define MD5_LONG __u32


#define MD5_CBLOCK	64
#define MD5_LBLOCK	(MD5_CBLOCK/4)
#define MD5_DIGEST_LENGTH 16

/* @type MD5_CTX MD5 context, used to calculate MD5 digests */
typedef struct MD5state_st
	{
		MD5_LONG A,B,C,D;
		MD5_LONG Nl,Nh;
		MD5_LONG data[MD5_LBLOCK];
		int num;
	} MD5_CTX;

//extern void MD5_Init(MD5_CTX *c);
//extern void MD5_Update(MD5_CTX *c, const void *data, unsigned long len);
//extern void MD5_Final(unsigned char *md, MD5_CTX *c);
//extern unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md);
//extern void MD5_Transform(MD5_CTX *c, const unsigned char *b);

void ipsec_hmac_md5(unsigned char*, int, unsigned char*, int, unsigned char*);

#endif
#endif