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