67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
// gost.h - originally written and placed in the public domain by Wei Dai
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/// \file gost.h
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/// \brief Classes for the GIST block cipher
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#ifndef CRYPTOPP_GOST_H
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#define CRYPTOPP_GOST_H
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#include "seckey.h"
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#include "secblock.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief GOST block cipher information
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/// \since Crypto++ 2.1
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struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>
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{
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CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "GOST";}
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};
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/// \brief GOST block cipher
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/// \sa <a href="http://www.cryptopp.com/wiki/GOST">GOST</a>
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/// \since Crypto++ 2.1
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class GOST : public GOST_Info, public BlockCipherDocumentation
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{
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/// \brief GOST block cipher default operation
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class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<GOST_Info>
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{
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public:
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void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
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protected:
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static void PrecalculateSTable();
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static const byte sBox[8][16];
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static volatile bool sTableCalculated;
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static word32 sTable[4][256];
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FixedSizeSecBlock<word32, 8> m_key;
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};
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/// \brief GOST block cipher encryption operation
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class CRYPTOPP_NO_VTABLE Enc : public Base
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{
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public:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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};
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/// \brief GOST block cipher decryption operation
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class CRYPTOPP_NO_VTABLE Dec : public Base
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{
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public:
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void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
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};
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public:
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typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
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typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
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};
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typedef GOST::Encryption GOSTEncryption;
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typedef GOST::Decryption GOSTDecryption;
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NAMESPACE_END
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#endif
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