/*
 Copyright (c) 2003, Dominik Reichl <dominik.reichl@t-online.de>
 All rights reserved.

 LICENSE TERMS

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.
 * 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.
 * Neither the name of ReichlSoft nor the names of its contributors may be used
   to endorse or promote products derived from this software without specific
   prior written permission.

 DISCLAIMER

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR 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 free implementation is based on the free original implementation of
// RSA Data Security. The source has been heavily modified to integrate
// to ReHash.

// Here's the original header:

/*
	Copyright (C) 1990-2, RSA Data Security, Inc. All rights reserved.

	License to copy and use this software is granted provided that it
	is identified as the "RSA Data Security, Inc. MD4 Message-Digest
	Algorithm" in all material mentioning or referencing this software
	or this function.

	License is also granted to make and use derivative works provided
	that such works are identified as "derived from the RSA Data
	Security, Inc. MD4 Message-Digest Algorithm" in all material
	mentioning or referencing the derived work.

	RSA Data Security, Inc. makes no representations concerning either
	the merchantability of this software or the suitability of this
	software for any particular purpose. It is provided "as is"
	without express or implied warranty of any kind.

	These notices must be retained in any copies of any part of this
	documentation and/or software.
*/

#ifndef ___MD4_H___
#define ___MD4_H___

#include "hashalgo.h"

class CMD4Hash : public CHashAlgorithm
{
public:
	CMD4Hash();
	~CMD4Hash();

	const char *GetName() { return "MD4"; }
	const char *GetShortName() { return "md4"; }
	UINTPREF GetLength() { return 16; }
	UINTPREF GetInternalLength() { return 64; }

	void Init(RH_DATA_INFO *pInfo);
	void Update(const UWORD8 *pBuf, UINTPREF uLen);
	void Final();
	void GetHash(UWORD8 *pHash) { memcpy(pHash, m_digest, 16); }

private:
	void _Transform(UWORD32 *pState, const UWORD8 *pBlock);
	void _Encode(UWORD8 *pOutput, const UWORD32 *pInput, UINTPREF uLen);
	void _Decode(UWORD32 *pOutput, const UWORD8 *pInput, UINTPREF uLen);

	UWORD32 m_state[4];
	UWORD32 m_count[2];
	UWORD8 m_buffer[64];

	UWORD8 m_digest[16];
};

#endif // ___MD4_H___