des1.h

VOD点歌系统

// DES1.h: interface for the CDES class.
//
//////////////////////////////////////////////////////////////////////

#ifndef DES1H
#define DES1H
//---------------------------------------------------------------------------

#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
#include <ExtCtrls.hpp>
//#include <cspin.h>
#include <Buttons.hpp>

typedef struct
{
	BYTE L[32];
	BYTE R[32];
}LRStruct;

typedef struct
{
	BYTE C[28];
	BYTE D[28];
}CDStruct;


typedef struct
{
	BYTE b0 :	1;
	BYTE b1 :	1;
	BYTE b2 :	1;
	BYTE b3 :	1;
	BYTE b4 :	1;
	BYTE b5 :	1;
	BYTE b6 :	1;
	BYTE b7 :	1;
}BYTEStruct;

void DesAlgo(unsigned char *src, unsigned char *key, unsigned char *dst, int bEncrypt);
void Decrypt(unsigned char * src, unsigned char * key, unsigned char * dst);
void Encrypt(unsigned char* src, unsigned char* key, unsigned char* dst);
void BitToByte(unsigned char * src, unsigned char * dst, int n);
void ByteToBit(unsigned char * src, unsigned char * dst, int n);
void Shift(CDStruct * pCD, int iCircle, int bEncrypt);
void RShift(unsigned char *buf28, int nShift);
void LShift(unsigned char *buf28, int nShift);
void fFunction(unsigned char* R, unsigned char* K, unsigned char* result);
void EOR(unsigned char * src, unsigned char* dst, int n);
void S_Change(unsigned char* src, unsigned char* result);
void SelectExchangeFromTable(int nTable, unsigned char * src, unsigned char * dst);

#endif //