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//
// MD4Engine.h
//
// Library: Foundation
// Package: Crypt
// Module: MD4Engine
//
// Definition of class MD4Engine.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
//
// MD4 (RFC 1320) algorithm:
// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. 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 Foundation_MD4Engine_INCLUDED
#define Foundation_MD4Engine_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/DigestEngine.h"
namespace Poco {
class Foundation_API MD4Engine: public DigestEngine
/// This class implementes the MD4 message digest algorithm,
/// described in RFC 1320.
{
public:
enum
{
BLOCK_SIZE = 64,
DIGEST_SIZE = 16
};
MD4Engine();
~MD4Engine();
std::size_t digestLength() const;
void reset();
const DigestEngine::Digest& digest();
protected:
void updateImpl(const void* data, std::size_t length);
private:
static void transform(UInt32 state[4], const unsigned char block[64]);
static void encode(unsigned char* output, const UInt32* input, std::size_t len);
static void decode(UInt32* output, const unsigned char* input, std::size_t len);
struct Context
{
UInt32 state[4]; // state (ABCD)
UInt32 count[2]; // number of bits, modulo 2^64 (lsb first)
unsigned char buffer[64]; // input buffer
};
Context _context;
DigestEngine::Digest _digest;
MD4Engine(const MD4Engine&);
MD4Engine& operator = (const MD4Engine&);
};
} // namespace Poco
#endif // Foundation_MD5Engine_INCLUDED
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