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(const byte *userKey, unsigned int length, const NameValuePairs &params);
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

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