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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 struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>
    00013 {
    00014         static const char *StaticAlgorithmName() {return "GOST";}
    00015 };
    00016
    00017 /// <a href="http://www.weidai.com/scan-mirror/cs.html#GOST">GOST</a>
    00018 class GOST : public GOST_Info, public BlockCipherDocumentation
    00019 {
    00020         class Base : public BlockCipherBaseTemplate<GOST_Info>
    00021         {
    00022         public:
    00023                 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
    00024
    00025         protected:
    00026                 static void PrecalculateSTable();
    00027
    00028                 static const byte sBox[8][16];
    00029                 static bool sTableCalculated;
    00030                 static word32 sTable[4][256];
    00031
    00032                 FixedSizeSecBlock<word32, 8> key;
    00033         };
    00034
    00035         class Enc : public Base
    00036         {
    00037         public:
    00038                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00039         };
    00040
    00041         class Dec : public Base
    00042         {
    00043         public:
    00044                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00045         };
    00046
    00047 public:
    00048         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
    00049         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
    00050 };
    00051
    00052 typedef GOST::Encryption GOSTEncryption;
    00053 typedef GOST::Decryption GOSTDecryption;
    00054
    00055 NAMESPACE_END
    00056
    00057 #endif