gost.h
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// gost.h - written and placed in the public domain by Wei Dai
//! \file gost.h
//! \brief Classes for the GIST block cipher
#ifndef CRYPTOPP_GOST_H
#define CRYPTOPP_GOST_H
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! \class GOST_Info
//! \brief GOST block cipher information
struct GOST_Info : public FixedBlockSize<8>, public FixedKeyLength<32>
{
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "GOST";}
};
//! \class GOST
//! \brief GOST block cipher
//! \sa <a href="http://www.weidai.com/scan-mirror/cs.html#GOST">GOST</a>
class GOST : public GOST_Info, public BlockCipherDocumentation
{
//! \class Base
//! \brief GOST block cipher default operation
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 Enc
//! \brief GOST block cipher encryption operation
class CRYPTOPP_NO_VTABLE Enc : public Base
{
public:
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
};
//! \class Dec
//! \brief GOST block cipher decryption operation
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
GOST
GOST block cipher.
Definition: gost.h:24
secblock.h
Classes and functions for secure memory allocations.
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:34
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:326
GOST_Info
GOST block cipher information.
Definition: gost.h:16
FixedKeyLength
Inherited by keyed algorithms with fixed key length.
Definition: seckey.h:128
BlockCipherDocumentation
Provides Encryption and Decryption typedefs used by derived classes to implement a block cipher.
Definition: seckey.h:423
seckey.h
Classes and functions for implementing secret key algorithms.
BlockCipherFinal< ENCRYPTION, Enc >
FixedSizeSecBlock< word32, 8 >
CryptoPP
Crypto++ library namespace.
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:277