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#ifndef CRYPTOPP_GOST_H

#define CRYPTOPP_GOST_H

 

/** \file

*/

 

#include "seckey.h"

#include "secblock.h"

 

NAMESPACE_BEGIN(CryptoPP)

 

//! _

struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>

{

        static const char *StaticAlgorithmName() {return "GOST";}

};

 

/// <a href="http://www.weidai.com/scan-mirror/cs.html#GOST">GOST</a>

class GOST : public GOST_Info, public BlockCipherDocumentation

{

        class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<GOST_Info>

        {

        public:

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

 

        protected:

                static void PrecalculateSTable();

 

                static const byte sBox[8][16];

                static volatile bool sTableCalculated;

                static word32 sTable[4][256];

 

                FixedSizeSecBlock<word32, 8> key;

        };

 

        class CRYPTOPP_NO_VTABLE Enc : public Base

        {

        public:

                void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

        };

 

        class CRYPTOPP_NO_VTABLE Dec : public Base

        {

        public:

                void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;

        };

 

public:

        typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;

        typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;

};

 

typedef GOST::Encryption GOSTEncryption;

typedef GOST::Decryption GOSTDecryption;

 

NAMESPACE_END

 

#endif