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korayakov
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Файл:Документация по криптоалгоритмам / CRYPTO30 / cast
.h#ifndef CRYPTOPP_CAST_H
#define CRYPTOPP_CAST_H
#include "cryptlib.h"
#include "misc.h"
NAMESPACE_BEGIN(CryptoPP)
class CAST128 : public BlockTransformation
{
public:
enum {KEYLENGTH=16, BLOCKSIZE=8};
unsigned int BlockSize() const {return BLOCKSIZE;}
protected:
// keylength should be between 5 and 16
CAST128(const byte *userKey, unsigned int keylength);
static const word32 S[8][256];
bool reduced;
SecBlock<word32> K;
};
class CAST128Encryption : public CAST128
{
public:
CAST128Encryption(const byte *userKey, unsigned int keylength=KEYLENGTH)
: CAST128(userKey, keylength) {}
void ProcessBlock(const byte *inBlock, byte * outBlock) const;
void ProcessBlock(byte * inoutBlock) const
{CAST128Encryption::ProcessBlock(inoutBlock, inoutBlock);}
};
class CAST128Decryption : public CAST128
{
public:
CAST128Decryption(const byte *userKey, unsigned int keylength=KEYLENGTH)
: CAST128(userKey, keylength) {}
void ProcessBlock(const byte *inBlock, byte * outBlock) const;
void ProcessBlock(byte * inoutBlock) const
{CAST128Decryption::ProcessBlock(inoutBlock, inoutBlock);}
};
NAMESPACE_END
#endif
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