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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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