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idea.h

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#ifndef CRYPTOPP_IDEA_H
#define CRYPTOPP_IDEA_H

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

NAMESPACE_BEGIN(CryptoPP)

class IDEA : public FixedBlockSize<8>, public FixedKeyLength<16>
{
public:
        IDEA(const byte *userKey, CipherDir dir);

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

private:
        void EnKey(const byte *);
        void DeKey();
        SecBlock<word> key;

#ifdef IDEA_LARGECACHE
        static inline void LookupMUL(word &a, word b);
        void LookupKeyLogs();
        static void BuildLogTables();
        static bool tablesBuilt;
        static word16 log[0x10000], antilog[0x10000];
#endif
};

class IDEAEncryption : public IDEA
{
public:
        IDEAEncryption(const byte * userKey, unsigned int = 0)
                : IDEA (userKey, ENCRYPTION) {}
};

class IDEADecryption : public IDEA
{
public:
        IDEADecryption(const byte * userKey, unsigned int = 0)
                : IDEA (userKey, DECRYPTION) {}
};

NAMESPACE_END

#endif

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