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# twofish.h

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    00001 #ifndef CRYPTOPP_TWOFISH_H
    00002 #define CRYPTOPP_TWOFISH_H
    00003
    00004 /** \file
    00005 */
    00006
    00007 #include "seckey.h"
    00008 #include "secblock.h"
    00009
    00010 NAMESPACE_BEGIN(CryptoPP)
    00011
    00012 //! _
    00013 struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 0, 32>, FixedRounds<16>
    00014 {
    00015         static const char *StaticAlgorithmName() {return "Twofish";}
    00016 };
    00017
    00018 /// <a href="http://www.weidai.com/scan-mirror/cs.html#Twofish">Twofish</a>
    00019 class Twofish : public Twofish_Info, public BlockCipherDocumentation
    00020 {
    00021         class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<Twofish_Info>
    00022         {
    00023         public:
    00024                 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
    00025
    00026         protected:
    00027                 static word32 h0(word32 x, const word32 *key, unsigned int kLen);
    00028                 static word32 h(word32 x, const word32 *key, unsigned int kLen);
    00029
    00030                 static const byte q[2][256];
    00031                 static const word32 mds[4][256];
    00032
    00033                 FixedSizeSecBlock<word32, 40> m_k;
    00034                 FixedSizeSecBlock<word32[256], 4> m_s;
    00035         };
    00036
    00037         class CRYPTOPP_NO_VTABLE Enc : public Base
    00038         {
    00039         public:
    00040                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00041         };
    00042
    00043         class CRYPTOPP_NO_VTABLE Dec : public Base
    00044         {
    00045         public:
    00046                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00047         };
    00048
    00049 public:
    00050         typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    00051         typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
    00052 };
    00053
    00054 typedef Twofish::Encryption TwofishEncryption;
    00055 typedef Twofish::Decryption TwofishDecryption;
    00056
    00057 NAMESPACE_END
    00058
    00059 #endif