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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

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