www.pudn.com > IPMessengerversion2.04.rar > BLOWFISH.H

// blowfish.h     interface file for blowfish.cpp 
// _THE BLOWFISH ENCRYPTION ALGORITHM_ 
// by Bruce Schneier 
// Revised code--3/20/94 
// Converted to C++ class 5/96, Jim Conger 
// 
// modify H.Shirouzu 07/2002 (add change_order(), CBC mode) 
 
#define MAXKEYBYTES		56		// 448 bits max 
#define NPASS			16		// SBox passes 
 
#define DWORD	unsigned long 
#define WORD	unsigned short 
#define BYTE	unsigned char 
 
class CBlowFish 
{ 
public: 
	enum Mode { ECB, CBC /*, OFB, CFB */ }; 
 
private: 
	DWORD	*PArray; 
	DWORD	(*SBoxes)[256]; 
	Mode	mode; 
	void	Blowfish_encipher(DWORD *xl, DWORD *xr); 
	void	Blowfish_decipher(DWORD *xl, DWORD *xr); 
 
public: 
			CBlowFish(); 
			~CBlowFish(); 
	void	Initialize(BYTE key[], int keybytes, Mode _mode=ECB); 
	DWORD	GetOutputLength(DWORD lInputLong); 
	DWORD	Encode(BYTE * pInput, BYTE * pOutput, DWORD lSize); 
	DWORD	Decode(BYTE * pInput, BYTE * pOutput, DWORD lSize); 
}; 
 
// choose a byte order for your hardware 
#define ORDER_DCBA	// chosing Intel in this case 
 
union aword { 
	DWORD	dword; 
	BYTE	byte[4]; 
	struct { 
#ifdef ORDER_ABCD  	// ABCD - big endian - motorola 
		BYTE byte0; 
		BYTE byte1; 
		BYTE byte2; 
		BYTE byte3; 
#endif 
#ifdef ORDER_DCBA  	// DCBA - little endian - intel 
		BYTE byte3; 
		BYTE byte2; 
		BYTE byte1; 
		BYTE byte0; 
#endif 
#ifdef ORDER_BADC  	// BADC - vax 
		BYTE byte1; 
		BYTE byte0; 
		BYTE byte3; 
		BYTE byte2; 
#endif 
	} w; 
};