/************************************************* * CAST-256 Header File * * (C) 1999-2007 Jack Lloyd * *************************************************/ #ifndef BOTAN_CAST256_H__ #define BOTAN_CAST256_H__ #include namespace Botan { /************************************************* * CAST-256 * *************************************************/ class BOTAN_DLL CAST_256 : public BlockCipher { public: void clear() throw() { MK.clear(); RK.clear(); } std::string name() const { return "CAST-256"; } BlockCipher* clone() const { return new CAST_256; } CAST_256() : BlockCipher(16, 4, 32, 4) {} private: void enc(const byte[], byte[]) const; void dec(const byte[], byte[]) const; void key(const byte[], u32bit); static const u32bit KEY_MASK[192]; static const byte KEY_ROT[32]; SecureBuffer MK; SecureBuffer 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