62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
#ifndef CRYPTOPP_IDEA_H
|
|
#define CRYPTOPP_IDEA_H
|
|
|
|
/** \file
|
|
*/
|
|
|
|
#include "seckey.h"
|
|
#include "secblock.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
//! _
|
|
struct IDEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<8>
|
|
{
|
|
static const char *StaticAlgorithmName() {return "IDEA";}
|
|
};
|
|
|
|
/// <a href="http://www.weidai.com/scan-mirror/cs.html#IDEA">IDEA</a>
|
|
class IDEA : public IDEA_Info, public BlockCipherDocumentation
|
|
{
|
|
public: // made public for internal purposes
|
|
#ifdef CRYPTOPP_NATIVE_DWORD_AVAILABLE
|
|
typedef word Word;
|
|
#else
|
|
typedef hword Word;
|
|
#endif
|
|
|
|
private:
|
|
class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<IDEA_Info>
|
|
{
|
|
public:
|
|
unsigned int OptimalDataAlignment() const {return 2;}
|
|
void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
|
|
|
|
void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
|
|
|
|
private:
|
|
void EnKey(const byte *);
|
|
void DeKey();
|
|
FixedSizeSecBlock<Word, 6*ROUNDS+4> m_key;
|
|
|
|
#ifdef IDEA_LARGECACHE
|
|
static inline void LookupMUL(word &a, word b);
|
|
void LookupKeyLogs();
|
|
static void BuildLogTables();
|
|
static volatile bool tablesBuilt;
|
|
static word16 log[0x10000], antilog[0x10000];
|
|
#endif
|
|
};
|
|
|
|
public:
|
|
typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
|
|
typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
|
|
};
|
|
|
|
typedef IDEA::Encryption IDEAEncryption;
|
|
typedef IDEA::Decryption IDEADecryption;
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif
|