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94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
/* twofish.hpp
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*
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* Copyright (C) 2003 Sawtooth Consulting Ltd.
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*
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* This file is part of yaSSL.
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*
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* yaSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* There are special exceptions to the terms and conditions of the GPL as it
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* is applied to yaSSL. View the full text of the exception in the file
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* FLOSS-EXCEPTIONS in the directory of this software distribution.
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*
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* yaSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/* twofish.hpp defines Twofish
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*/
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#ifndef TAO_CRYPT_TWOFISH_HPP
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#define TAO_CRYPT_TWOFISH_HPP
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#include "misc.hpp"
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#include "modes.hpp"
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#include STL_ALGORITHM_FILE
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namespace STL = STL_NAMESPACE;
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namespace TaoCrypt {
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enum { TWOFISH_BLOCK_SIZE = 16 };
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// Twofish encryption and decryption, see
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class Twofish : public Mode_BASE {
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public:
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enum { BLOCK_SIZE = TWOFISH_BLOCK_SIZE };
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Twofish(CipherDir DIR, Mode MODE)
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: Mode_BASE(BLOCK_SIZE), dir_(DIR), mode_(MODE) {}
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void Process(byte*, const byte*, word32);
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void SetKey(const byte* key, word32 sz, CipherDir fake = ENCRYPTION);
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void SetIV(const byte* iv) { memcpy(r_, iv, BLOCK_SIZE); }
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private:
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CipherDir dir_;
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Mode mode_;
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static const byte q_[2][256];
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static const word32 mds_[4][256];
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word32 k_[40];
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word32 s_[4][256];
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static word32 h0(word32 x, const word32 *key, unsigned int kLen);
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static word32 h(word32 x, const word32 *key, unsigned int kLen);
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void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
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void encrypt(const byte*, const byte*, byte*) const;
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void decrypt(const byte*, const byte*, byte*) const;
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void AsmEncrypt(const byte* inBlock, byte* outBlock) const;
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void AsmDecrypt(const byte* inBlock, byte* outBlock) const;
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Twofish(const Twofish&); // hide copy
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Twofish& operator=(const Twofish&); // and assign
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};
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typedef BlockCipher<ENCRYPTION, Twofish, ECB> Twofish_ECB_Encryption;
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typedef BlockCipher<DECRYPTION, Twofish, ECB> Twofish_ECB_Decryption;
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typedef BlockCipher<ENCRYPTION, Twofish, CBC> Twofish_CBC_Encryption;
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typedef BlockCipher<DECRYPTION, Twofish, CBC> Twofish_CBC_Decryption;
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} // naemspace
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#endif // TAO_CRYPT_TWOFISH_HPP
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