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gost.h

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00001 #ifndef CRYPTOPP_GOST_H
00002 #define CRYPTOPP_GOST_H
00003 
00004 /** \file
00005 */
00006 
00007 #include "seckey.h"
00008 #include "secblock.h"
00009 
00010 NAMESPACE_BEGIN(CryptoPP)
00011 
00012 //! _
00013 struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>
00014 {
00015     static const char *StaticAlgorithmName() {return "GOST";}
00016 };
00017 
00018 /// <a href="http://www.weidai.com/scan-mirror/cs.html#GOST">GOST</a>
00019 class GOST : public GOST_Info, public BlockCipherDocumentation
00020 {
00021     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<GOST_Info>
00022     {
00023     public:
00024         void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
00025 
00026     protected:
00027         static void PrecalculateSTable();
00028 
00029         static const byte sBox[8][16];
00030         static bool sTableCalculated;
00031         static word32 sTable[4][256];
00032 
00033         FixedSizeSecBlock<word32, 8> key;
00034     };
00035 
00036     class CRYPTOPP_NO_VTABLE Enc : public Base
00037     {
00038     public:
00039         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00040     };
00041 
00042     class CRYPTOPP_NO_VTABLE Dec : public Base
00043     {
00044     public:
00045         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00046     };
00047 
00048 public:
00049     typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
00050     typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
00051 };
00052 
00053 typedef GOST::Encryption GOSTEncryption;
00054 typedef GOST::Decryption GOSTDecryption;
00055 
00056 NAMESPACE_END
00057 
00058 #endif

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