#ifndef CRYPTOPP_CAST_H #define CRYPTOPP_CAST_H /** \file */ #include "seckey.h" #include "secblock.h" NAMESPACE_BEGIN(CryptoPP) class CAST { protected: static const word32 S[8][256]; }; //! algorithm info struct CAST128_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 5, 16> { static const char *StaticAlgorithmName() {return "CAST-128";} }; /// <a href="http://www.weidai.com/scan-mirror/cs.html#CAST-128">CAST-128</a> class CAST128 : public CAST128_Info, public BlockCipherDocumentation { class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST128_Info> { public: void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms); protected: bool reduced; FixedSizeSecBlock<word32, 32> K; }; class CRYPTOPP_NO_VTABLE Enc : public Base { public: void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; }; class CRYPTOPP_NO_VTABLE Dec : public Base { public: void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; }; public: typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; }; //! algorithm info struct CAST256_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32> { static const char *StaticAlgorithmName() {return "CAST-256";} }; //! <a href="http://www.weidai.com/scan-mirror/cs.html#CAST-256">CAST-256</a> class CAST256 : public CAST256_Info, public BlockCipherDocumentation { class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST256_Info> { public: void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms); void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; protected: static const word32 t_m[8][24]; static const unsigned int t_r[8][24]; static void Omega(int i, word32 kappa[8]); FixedSizeSecBlock<word32, 8*12> K; }; public: typedef BlockCipherFinal<ENCRYPTION, Base> Encryption; typedef BlockCipherFinal<DECRYPTION, Base> Decryption; }; typedef CAST128::Encryption CAST128Encryption; typedef CAST128::Decryption CAST128Decryption; typedef CAST256::Encryption CAST256Encryption; typedef CAST256::Decryption CAST256Decryption; NAMESPACE_END #endif