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/*
Copyright (c) 2006, 2010, 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.
*/
/* blowfish.hpp defines Blowfish
*/
#ifndef TAO_CRYPT_BLOWFISH_HPP
#define TAO_CRYPT_BLOWFISH_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_BLOWFISH_ASM
#endif
namespace TaoCrypt {
enum { BLOWFISH_BLOCK_SIZE = 8 };
// Blowfish encryption and decryption, see
class Blowfish : public Mode_BASE {
public:
enum { BLOCK_SIZE = BLOWFISH_BLOCK_SIZE, ROUNDS = 16 };
Blowfish(CipherDir DIR, Mode MODE)
: Mode_BASE(BLOCK_SIZE, DIR, MODE), sbox_(pbox_ + ROUNDS + 2) {}
#ifdef DO_BLOWFISH_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 word32 p_init_[ROUNDS + 2];
static const word32 s_init_[4 * 256];
word32 pbox_[ROUNDS + 2 + 4 * 256];
word32* sbox_;
void crypt_block(const word32 in[2], word32 out[2]) const;
void AsmProcess(const byte* in, byte* out) const;
void ProcessAndXorBlock(const byte*, const byte*, byte*) const;
Blowfish(const Blowfish&); // hide copy
Blowfish& operator=(const Blowfish&); // and assign
};
typedef BlockCipher<ENCRYPTION, Blowfish, ECB> Blowfish_ECB_Encryption;
typedef BlockCipher<DECRYPTION, Blowfish, ECB> Blowfish_ECB_Decryption;
typedef BlockCipher<ENCRYPTION, Blowfish, CBC> Blowfish_CBC_Encryption;
typedef BlockCipher<DECRYPTION, Blowfish, CBC> Blowfish_CBC_Decryption;
} // namespace
#endif // TAO_CRYPT_BLOWFISH_HPP
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