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