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/*
* CAST-128
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_CAST128_H__
#define BOTAN_CAST128_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* CAST-128
*/
class BOTAN_DLL CAST_128 : public BlockCipher
{
public:
void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
void clear() { zeroise(MK); zeroise(RK); }
std::string name() const { return "CAST-128"; }
BlockCipher* clone() const { return new CAST_128; }
CAST_128() : BlockCipher(8, 11, 16), MK(16), RK(16) {}
private:
void key_schedule(const byte[], u32bit);
static void cast_ks(MemoryRegion<u32bit>& ks,
MemoryRegion<u32bit>& user_key);
static const u32bit S5[256];
static const u32bit S6[256];
static const u32bit S7[256];
static const u32bit S8[256];
SecureVector<u32bit> 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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