/*
 * 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 sha1.h
 *  @brief Header of US Secure Hash Algorithm 1 (SHA1)
 *
 *  @author Christian Scheurer <http://www.christianscheurer.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 __SHA_H__
#define __SHA_H__

#include "ipsec_types.h"

#if LWIP_IPSEC

/*
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 * ! SHA_LONG has to be at least 32 bits wide. If it's wider, then !
 * ! SHA_LONG_LOG2 has to be defined along.                        !
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 */

#define SHA_LONG __u32

#define SHA_LBLOCK	16
#define SHA_DIGEST_LENGTH 20

typedef struct SHAstate_st
	{
	SHA_LONG h0,h1,h2,h3,h4;
	SHA_LONG Nl,Nh;
	SHA_LONG data[SHA_LBLOCK];
	int num;
	} SHA_CTX;

//void SHA1_Init(SHA_CTX *c);
//void SHA1_Update(SHA_CTX *c, const void *data, unsigned long len);
//void SHA1_Final(unsigned char *md, SHA_CTX *c);
//unsigned char *SHA1(const unsigned char *d, unsigned long n,unsigned char *md);
//void SHA1_Transform(SHA_CTX *c, const unsigned char *data);

void ipsec_hmac_sha1(unsigned char*, int, unsigned char*, int, unsigned char*);

#endif
#endif