idea.h

各种加密算法的集合

#ifndef CRYPTOPP_IDEA_H 
#define CRYPTOPP_IDEA_H 
 
#include "cryptlib.h" 
#include "misc.h" 
 
NAMESPACE_BEGIN(CryptoPP) 
 
class IDEA : public BlockTransformation 
{ 
public: 
	IDEA(const byte *userKey, CipherDir dir); 
 
	void ProcessBlock(byte * inoutBlock) const 
		{IDEA::ProcessBlock(inoutBlock, inoutBlock);} 
	void ProcessBlock(const byte *inBlock, byte * outBlock) const; 
 
	enum {KEYLENGTH=16, BLOCKSIZE=8, ROUNDS=8}; 
	unsigned int BlockSize() const {return BLOCKSIZE;}; 
 
private: 
	void EnKey(const byte *); 
	void DeKey(); 
	SecBlock<word> key; 
 
#ifdef IDEA_LARGECACHE 
	static inline void LookupMUL(unsigned int &a, word16 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) 
		: IDEA (userKey, ENCRYPTION) {} 
}; 
 
class IDEADecryption : public IDEA 
{ 
public: 
	IDEADecryption(const byte * userKey) 
		: IDEA (userKey, DECRYPTION) {} 
}; 
 
NAMESPACE_END 
 
#endif