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korayakov
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Файл:Документация по криптоалгоритмам / CRYPTO30 / rc6
.h#ifndef CRYPTOPP_RC6_H
#define CRYPTOPP_RC6_H
#include "cryptlib.h"
#include "misc.h"
NAMESPACE_BEGIN(CryptoPP)
class RC6Base : public BlockTransformation
{
public:
typedef word32 RC6_WORD;
// values of KEYLENGTH and ROUNDS are defaults only
enum {KEYLENGTH=16, BLOCKSIZE = sizeof(RC6_WORD)*4, ROUNDS=20};
unsigned int BlockSize() const {return BLOCKSIZE;}
protected:
RC6Base(const byte *key, unsigned int keyLen, unsigned int rounds);
const unsigned int r; // number of rounds
SecBlock<RC6_WORD> sTable; // expanded key table
};
class RC6Encryption : public RC6Base
{
public:
RC6Encryption(const byte *key, unsigned int keyLen=KEYLENGTH, unsigned int rounds=ROUNDS)
: RC6Base(key, keyLen, rounds) {}
void ProcessBlock(byte * inoutBlock) const
{RC6Encryption::ProcessBlock(inoutBlock, inoutBlock);}
void ProcessBlock(const byte *inBlock, byte * outBlock) const;
};
class RC6Decryption : public RC6Base
{
public:
RC6Decryption(const byte *key, unsigned int keyLen=KEYLENGTH, unsigned int rounds=ROUNDS)
: RC6Base(key, keyLen, rounds) {}
void ProcessBlock(byte * inoutBlock) const
{RC6Decryption::ProcessBlock(inoutBlock, inoutBlock);}
void ProcessBlock(const byte *inBlock, byte * outBlock) const;
};
NAMESPACE_END
#endif
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