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MySQL 5.1: mysql/src/5.1-dbg/extra/yassl/taocrypt/include/twofish.hpp Source File
mysql/src/5.1-dbg/extra/yassl/taocrypt/include/twofish.hpp

00001 /* twofish.hpp                                
00002  *
00003  * Copyright (C) 2003 Sawtooth Consulting Ltd.
00004  *
00005  * This file is part of yaSSL.
00006  *
00007  * yaSSL is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2 of the License, or
00010  * (at your option) any later version.
00011  *
00012  * There are special exceptions to the terms and conditions of the GPL as it
00013  * is applied to yaSSL. View the full text of the exception in the file
00014  * FLOSS-EXCEPTIONS in the directory of this software distribution.
00015  *
00016  * yaSSL is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  * GNU General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU General Public License
00022  * along with this program; if not, write to the Free Software
00023  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
00024  */
00025 
00026 /* twofish.hpp defines Twofish
00027 */
00028 
00029 
00030 #ifndef TAO_CRYPT_TWOFISH_HPP
00031 #define TAO_CRYPT_TWOFISH_HPP
00032 
00033 #include "misc.hpp"
00034 #include "modes.hpp"
00035 #include "algorithm.hpp"
00036 
00037 namespace TaoCrypt {
00038 
00039 enum { TWOFISH_BLOCK_SIZE = 16 };
00040 
00041 
00042 // Twofish encryption and decryption, see 
00043 class Twofish : public Mode_BASE {
00044 public:
00045     enum { BLOCK_SIZE = TWOFISH_BLOCK_SIZE };
00046 
00047     Twofish(CipherDir DIR, Mode MODE)
00048         : Mode_BASE(BLOCK_SIZE), dir_(DIR), mode_(MODE) {}
00049 
00050     void Process(byte*, const byte*, word32);
00051     void SetKey(const byte* key, word32 sz, CipherDir fake = ENCRYPTION);
00052     void SetIV(const byte* iv) { memcpy(r_, iv, BLOCK_SIZE); }
00053 private:
00054     CipherDir dir_;
00055     Mode      mode_;
00056 
00057         static const byte     q_[2][256];
00058         static const word32 mds_[4][256];
00059 
00060         word32 k_[40];
00061         word32 s_[4][256];
00062 
00063         static word32 h0(word32 x, const word32 *key, unsigned int kLen);
00064         static word32 h(word32 x, const word32 *key, unsigned int kLen);
00065 
00066     void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
00067 
00068     void encrypt(const byte*, const byte*, byte*) const;
00069     void decrypt(const byte*, const byte*, byte*) const;
00070 
00071     void AsmEncrypt(const byte* inBlock, byte* outBlock) const;
00072     void AsmDecrypt(const byte* inBlock, byte* outBlock) const;
00073 
00074     Twofish(const Twofish&);            // hide copy
00075     Twofish& operator=(const Twofish&); // and assign
00076 };
00077 
00078 
00079 typedef BlockCipher<ENCRYPTION, Twofish, ECB> Twofish_ECB_Encryption;
00080 typedef BlockCipher<DECRYPTION, Twofish, ECB> Twofish_ECB_Decryption;
00081 
00082 typedef BlockCipher<ENCRYPTION, Twofish, CBC> Twofish_CBC_Encryption;
00083 typedef BlockCipher<DECRYPTION, Twofish, CBC> Twofish_CBC_Decryption;
00084 
00085 
00086 
00087 } // naemspace
00088 
00089 #endif // TAO_CRYPT_TWOFISH_HPP
00090
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