/* * 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 BlockCipher_Fixed_Block_Size<8> { 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