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/*
* SAFER-SK
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_SAFER_SK_H__
#define BOTAN_SAFER_SK_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* SAFER-SK
*/
class BOTAN_DLL SAFER_SK : public Block_Cipher_Fixed_Params<8, 16>
{
public:
void encrypt_n(const byte in[], byte out[], size_t blocks) const;
void decrypt_n(const byte in[], byte out[], size_t blocks) const;
void clear() { zeroise(EK); }
std::string name() const;
BlockCipher* clone() const;
/**
* @param rounds the number of rounds to use - must be between 1
* and 13
*/
SAFER_SK(size_t rounds);
private:
size_t get_rounds() const { return (EK.size() - 8) / 16; }
void key_schedule(const byte[], size_t);
static const byte EXP[256];
static const byte LOG[512];
static const byte BIAS[208];
static const byte KEY_INDEX[208];
SecureVector<byte> EK;
};
}
#endif
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