pwd.cpp

一个简单的密码加密

// pwd.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include "pwd.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//
//	Note!
//
//		If this DLL is dynamically linked against the MFC
//		DLLs, any functions exported from this DLL which
//		call into MFC must have the AFX_MANAGE_STATE macro
//		added at the very beginning of the function.
//
//		For example:
//
//		extern "C" BOOL PASCAL EXPORT ExportedFunction()
//		{
//			AFX_MANAGE_STATE(AfxGetStaticModuleState());
//			// normal function body here
//		}
//
//		It is very important that this macro appear in each
//		function, prior to any calls into MFC.  This means that
//		it must appear as the first statement within the 
//		function, even before any object variable declarations
//		as their constructors may generate calls into the MFC
//		DLL.
//
//		Please see MFC Technical Notes 33 and 58 for additional
//		details.
//

/////////////////////////////////////////////////////////////////////////////
// CPwdApp

BEGIN_MESSAGE_MAP(CPwdApp, CWinApp)
	//{{AFX_MSG_MAP(CPwdApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CPwdApp construction

CPwdApp::CPwdApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CPwdApp object

CPwdApp theApp;
extern "C" _declspec ( dllexport )
int PASCAL PassWord(char* oldpass,char* newpass)
{
	//将密码数据加密
	
	unsigned int j,nLen;		
	char *s1 = "数据车间接系";
	char *s2 = "DrowssaPteG";
	char pcTemp[50] = "";
	//不够10位后填空格
	//sprintf(pcTemp,"%10s",pcPasswd);
	strcpy(pcTemp,oldpass);
	nLen = strlen(pcTemp);
	for(j=0;j<10-nLen;j++)
		strcat(pcTemp," ");

	for(j=0;j<10;j++)
		pcTemp[j] = pcTemp[j] ^ s2[j];
	for(j=0;j<10;j++)
		pcTemp[j] = pcTemp[j] ^ s1[j];
	pcTemp[10] = 0;
    
	strcpy(newpass,pcTemp); 
	//::MessageBox(NULL, msg, "信息", MB_OK);
return 0;
}
/*
unsigned int PASCAL undoEncrypt( char* pcresult )
{
  short nlength = 0;
  char aOne;
  nlength = strlen( pcresult );
  for( int i=0; i<nlength; i++ )
  {
    aOne = pcresult[i];
    aOne ^= 0xAA;
    pcresult[i] = aOne - 2*i;
  }
  return 0;
}
*/
unsigned int PASCAL undoEncrypt( char* pcresult )
{
  short nlength = 0;
  char aOne;
  nlength = strlen( pcresult );
  for( int i=0; i<nlength; i++ )
  {
    aOne = pcresult[i];
    //aOne ^= 0xAA;
    pcresult[i] = aOne + i ;
  }
  return 0;
}