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/*************************************************
* Twofish Header File *
* (C) 1999-2007 The Botan Project *
*************************************************/
#ifndef BOTAN_TWOFISH_H__
#define BOTAN_TWOFISH_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* Twofish *
*************************************************/
class Twofish : public BlockCipher
{
public:
void clear() throw();
std::string name() const { return "Twofish"; }
BlockCipher* clone() const { return new Twofish; }
Twofish() : BlockCipher(16, 16, 32, 8) {}
private:
void enc(const byte[], byte[]) const;
void dec(const byte[], byte[]) const;
void key(const byte[], u32bit);
static void rs_mul(byte[4], byte, u32bit);
static const u32bit MDS0[256], MDS1[256], MDS2[256], MDS3[256];
static const byte Q0[256], Q1[256], RS[32];
static const byte EXP_TO_POLY[255], POLY_TO_EXP[255];
SecureBuffer<u32bit, 256> SBox0, SBox1, SBox2, SBox3;
SecureBuffer<u32bit, 40> round_key;
};
}
#endif
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