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/*************************************************
* CAST-128 Header File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#ifndef BOTAN_CAST128_H__
#define BOTAN_CAST128_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* CAST-128 *
*************************************************/
class BOTAN_DLL CAST_128 : public BlockCipher
{
public:
void clear() throw() { MK.clear(); RK.clear(); }
std::string name() const { return "CAST-128"; }
BlockCipher* clone() const { return new CAST_128; }
CAST_128() : BlockCipher(8, 11, 16) {}
private:
void enc(const byte[], byte[]) const;
void dec(const byte[], byte[]) const;
void key(const byte[], u32bit);
static void key_schedule(u32bit[16], u32bit[4]);
static const u32bit S5[256];
static const u32bit S6[256];
static const u32bit S7[256];
static const u32bit S8[256];
SecureBuffer<u32bit, 16> MK, RK;
};
extern const u32bit CAST_SBOX1[256];
extern const u32bit CAST_SBOX2[256];
extern const u32bit CAST_SBOX3[256];
extern const u32bit CAST_SBOX4[256];
}
#endif
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