idea.h
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// idea.h - written and placed in the public domain by Wei Dai
//! \file idea.h
//! \brief Classes for the IDEA block cipher
#ifndef CRYPTOPP_IDEA_H
#define CRYPTOPP_IDEA_H
#include "seckey.h"
#include "secblock.h"
NAMESPACE_BEGIN(CryptoPP)
//! \class IDEA_Info
//! \brief IDEA block cipher information
struct IDEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<8>
{
CRYPTOPP_CONSTEXPR static const char *StaticAlgorithmName() {return "IDEA";}
};
//! \class IDEA
//! \brief IDEA block cipher
//! \sa <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 &params);
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
secblock.h
Classes and functions for secure memory allocations.
FixedBlockSize
Inherited by algorithms with fixed block size.
Definition: seckey.h:34
IDEA_Info
IDEA block cipher information.
Definition: idea.h:16
BlockCipherImpl
Provides a base implementation of Algorithm and SimpleKeyingInterface for block ciphers.
Definition: seckey.h:326
FixedKeyLength
Inherited by keyed algorithms with fixed key length.
Definition: seckey.h:128
Word
Definition: integer.cpp:338
IDEA
IDEA block cipher.
Definition: idea.h:24
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
Provides class member functions to key a block cipher.
Definition: seckey.h:339
FixedSizeSecBlock< Word, 6 *ROUNDS+4 >
CryptoPP
Crypto++ library namespace.
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:277
FixedRounds
Inherited by algorithms with fixed number of rounds.
Definition: seckey.h:47