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/*
Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
This program 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; version 2 of the License.
This program 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; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA.
*/
/* twofish.hpp defines Twofish
*/
#ifndef TAO_CRYPT_TWOFISH_HPP
#define TAO_CRYPT_TWOFISH_HPP
#include "misc.hpp"
#include "modes.hpp"
#ifdef USE_SYS_STL
#include <algorithm>
#else
#include "algorithm.hpp"
#endif
namespace STL = STL_NAMESPACE;
#if defined(TAOCRYPT_X86ASM_AVAILABLE) && defined(TAO_ASM)
#define DO_TWOFISH_ASM
#endif
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, MODE) {}
#ifdef DO_TWOFISH_ASM
void Process(byte*, const byte*, word32);
#endif
void SetKey(const byte* key, word32 sz, CipherDir fake = ENCRYPTION);
void SetIV(const byte* iv) { memcpy(r_, iv, BLOCK_SIZE); }
private:
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
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