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blowfish.h
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// 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
#include <cstdint>
#define MAXKEYBYTES 56 // 448 bits max
#define NPASS 16 // SBox passes
#define DWORD uint32_t
#define WORD uint16_t
#define BYTE uint8_t
class CBlowFish
{
private:
DWORD * PArray ;
DWORD (* SBoxes)[256];
void Blowfish_encipher (DWORD *xl, DWORD *xr) ;
void Blowfish_decipher (DWORD *xl, DWORD *xr) ;
public:
CBlowFish () ;
~CBlowFish () ;
void Initialize (BYTE key[], int keybytes) ;
DWORD GetOutputLength (DWORD lInputLong) ;
DWORD Encode (BYTE * pInput, BYTE * pOutput, DWORD lSize) ;
void Decode (BYTE * pInput, BYTE * pOutput, DWORD lSize) ;
} ;
// choose a byte order for your hardware
#define ORDER_DCBA // chosing Intel in this case
#ifdef ORDER_DCBA // DCBA - little endian - intel
union aword {
DWORD dword;
BYTE byte [4];
struct {
unsigned int byte3:8;
unsigned int byte2:8;
unsigned int byte1:8;
unsigned int byte0:8;
} w;
};
#endif
#ifdef ORDER_ABCD // ABCD - big endian - motorola
union aword {
DWORD dword;
BYTE byte [4];
struct {
unsigned int byte0:8;
unsigned int byte1:8;
unsigned int byte2:8;
unsigned int byte3:8;
} w;
};
#endif
#ifdef ORDER_BADC // BADC - vax
union aword {
DWORD dword;
BYTE byte [4];
struct {
unsigned int byte1:8;
unsigned int byte0:8;
unsigned int byte3:8;
unsigned int byte2:8;
} w;
};
#endif