/*
 * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#ifndef CRYPTOPP_SHA_H
#define CRYPTOPP_SHA_H

#include "iterhash.h"

NAMESPACE_BEGIN(CryptoPP)

/// <a href="http://www.weidai.com/scan-mirror/md.html#SHA-1">SHA-1</a>
class SHA : public IteratedHash<word32, true, 64>
{
public:
	enum {DIGESTSIZE = 20};
	SHA() : IteratedHash<word32, true, 64>(DIGESTSIZE) {Init();}
	static void Transform(word32 *digest, const word32 *data);

protected:
	void Init();
	void vTransform(const word32 *data) {Transform(digest, data);}
};

typedef SHA SHA1;

//! implements the SHA-256 standard
class SHA256 : public IteratedHash<word32, true, 64>
{
public:
	enum {DIGESTSIZE = 32};
	SHA256() : IteratedHash<word32, true, 64>(DIGESTSIZE) {Init();}
	static void Transform(word32 *digest, const word32 *data);

protected:
	void Init();
	void vTransform(const word32 *data) {Transform(digest, data);}

	const static word32 K[64];
};

#ifdef WORD64_AVAILABLE

//! implements the SHA-512 standard
class SHA512 : public IteratedHash<word64, true, 128>
{
public:
	enum {DIGESTSIZE = 64};
	SHA512() : IteratedHash<word64, true, 128>(DIGESTSIZE) {Init();}
	static void Transform(word64 *digest, const word64 *data);

protected:
	void Init();
	void vTransform(const word64 *data) {Transform(digest, data);}

	const static word64 K[80];
};

//! implements the SHA-384 standard
class SHA384 : public IteratedHash<word64, true, 128>
{
public:
	enum {DIGESTSIZE = 48};
	SHA384() : IteratedHash<word64, true, 128>(64) {Init();}
	unsigned int DigestSize() const {return DIGESTSIZE;};

protected:
	void Init();
	void vTransform(const word64 *data) {SHA512::Transform(digest, data);}
};

#endif

NAMESPACE_END

#endif