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gost.h

Go to the documentation of this file.

#ifndef CRYPTOPP_GOST_H
#define CRYPTOPP_GOST_H

#include "cryptlib.h"
#include "misc.h"

NAMESPACE_BEGIN(CryptoPP)

class GOST : public FixedBlockSize<8>, public FixedKeyLength<32>
{
protected:
        GOST(const byte *userKey, CipherDir);
        static void PrecalculateSTable();

        static const byte sBox[8][16];
        static bool sTableCalculated;
        static word32 sTable[4][256];

        SecBlock<word32> key;
};

class GOSTEncryption : public GOST
{
public:
        GOSTEncryption(const byte * userKey, unsigned int = 0)
                : GOST (userKey, ENCRYPTION) {}

        void ProcessBlock(const byte *inBlock, byte * outBlock) const;
        void ProcessBlock(byte * inoutBlock) const
                {GOSTEncryption::ProcessBlock(inoutBlock, inoutBlock);}
};

class GOSTDecryption : public GOST
{
public:
        GOSTDecryption(const byte * userKey, unsigned int = 0)
                : GOST (userKey, DECRYPTION) {}

        void ProcessBlock(const byte *inBlock, byte * outBlock) const;
        void ProcessBlock(byte * inoutBlock) const
                {GOSTDecryption::ProcessBlock(inoutBlock, inoutBlock);}
};

NAMESPACE_END

#endif

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