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#ifndef BU_BLOWFISH_H
#define BU_BLOWFISH_H
#include "bu/filter.h"
#define NUM_SUBKEYS 18
#define NUM_S_BOXES 4
#define NUM_ENTRIES 256
#define MAX_STRING 256
#define MAX_PASSWD 56 // 448bits
namespace Bu
{
class Blowfish : public Bu::Filter
{
public:
Blowfish( Bu::Stream &rNext );
virtual ~Blowfish();
void setPassword( const Bu::String &sPass );
virtual void start();
virtual Bu::size stop();
virtual Bu::size read( void *pBuf, Bu::size iBytes );
virtual Bu::size write( const void *pBuf, Bu::size iBytes );
using Bu::Stream::read;
using Bu::Stream::write;
private:
unsigned int PA[NUM_SUBKEYS];
unsigned int SB[NUM_S_BOXES][NUM_ENTRIES];
#if __BYTE_ORDER == __BIG_ENDIAN
struct WordByte
{
unsigned int zero:8;
unsigned int one:8;
unsigned int two:8;
unsigned int three:8;
};
#elif __BYTE_ORDER == __LITTLE_ENDIAN
struct WordByte
{
unsigned int three:8;
unsigned int two:8;
unsigned int one:8;
unsigned int zero:8;
};
#else
#error No endianness defined
#endif
union Word
{
unsigned int word;
WordByte byte;
};
struct DWord
{
Word word0;
Word word1;
};
void reset();
inline void BF_En( Word *, Word * );
inline void BF_De( Word *, Word * );
};
};
#endif
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