/************************************************* * Turing Header File * * (C) 1999-2007 Jack Lloyd * *************************************************/ #ifndef BOTAN_TURING_H__ #define BOTAN_TURING_H__ #include namespace Botan { /************************************************* * Turing * *************************************************/ class BOTAN_DLL Turing : public StreamCipher { public: void clear() throw(); std::string name() const { return "Turing"; } StreamCipher* clone() const { return new Turing; } Turing() : StreamCipher(4, 32, 4) { position = 0; } private: void cipher(const byte[], byte[], u32bit); void key(const byte[], u32bit); void resync(const byte[], u32bit); void generate(); static u32bit fixedS(u32bit); static void gen_sbox(MemoryRegion&, u32bit, const MemoryRegion&); static const u32bit Q_BOX[256]; static const byte SBOX[256]; static const byte OFFSETS[272]; SecureBuffer S0, S1, S2, S3; SecureBuffer R; SecureVector K; SecureBuffer buffer; u32bit position; }; } #endif