VC++信息安全编程（2）分析程序实现自我删除

很多时候，我们制作自动安装程序，安装完成以后自动删除，软件仅仅安装一次就自动删除，以保护软件知识产权。

软件自动删除的代码是如何实现的呢，我们来看下

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

/////////////////////////////////////////////////////////////////////////////
// CSelfDelDlg dialog

CSelfDelDlg::CSelfDelDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSelfDelDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSelfDelDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSelfDelDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSelfDelDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSelfDelDlg, CDialog)
	//{{AFX_MSG_MAP(CSelfDelDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_Delete_1, OnDelete1)
	ON_BN_CLICKED(IDC_Delete_2, OnDelete2)
	ON_BN_CLICKED(IDC_Any, OnAny)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSelfDelDlg message handlers

BOOL CSelfDelDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSelfDelDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CSelfDelDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSelfDelDlg::OnDelete1() 
{
/*char name[256];
char *ptr=::GetCommandLine();	
strncpy(name,ptr,255);
for(int i=1;i<256;i++)if(name[i]=='\"')break;
char path[256];
for(int j=0;j<i;
*/
HMODULE module = GetModuleHandle(0);
CHAR buf[MAX_PATH];
GetModuleFileName(module, buf, sizeof(buf));
if(DeleteFile(buf))AfxMessageBox("自我删除成功!");
else MessageBox("自我删除失败!","直接用 DeleteFile",MB_OK|MB_ICONEXCLAMATION);
}

void CSelfDelDlg::OnDelete2() 
{
  HMODULE module = GetModuleHandle(0);
  CHAR buf[MAX_PATH];
  GetModuleFileName(module, buf, sizeof buf);
  CloseHandle(HANDLE(4));
__asm {
   lea eax, buf
   push 0
   push 0
  push eax
  push ExitProcess
  push module
  push DeleteFile
  push UnmapViewOfFile
  ret
}
}

void CSelfDelDlg::OnAny() 
{
OSVERSIONINFO ver;
ver.dwOSVersionInfoSize=sizeof(ver);
GetVersionEx(&ver);	
//if(ver.dwPlatformId==VER_PLATFORM_WIN32_WINDOWS){//Is win95 or 98
  AfxMessageBox("98");
  HMODULE h = GetModuleHandle(0);
  CHAR buf[MAX_PATH];
  GetModuleFileName(h, buf, sizeof buf);
  FILE *fp;
  if(!(fp=fopen("c:\\anyexe.bat","wb")))return;
  CString in;
  in="del ";
  in+=buf;
 
  in+="\r\n";
  in+="del ";
  in+="c:\\anyexe.bat";
  fwrite(in.GetBuffer(0),in.GetLength(),1,fp);
  fclose(fp);
  AfxMessageBox(in);
  ::ShellExecute(0,NULL,"command.exe","c:\\anyexe.bat",NULL,0);
/*
 }
else if(ver.dwPlatformId==VER_PLATFORM_WIN32_NT)//Is Nt or 2000
{

//AfxMessageBox("2000");
  HMODULE module = GetModuleHandle(0);
  CHAR buf[MAX_PATH];
  GetModuleFileName(module, buf, sizeof buf);
  CloseHandle(HANDLE(4));
__asm {
   lea eax, buf
   push 0
   push 0
  push eax
  push ExitProcess
  push module
  push DeleteFile
  push UnmapViewOfFile
  ret
}
*/
//}
//else{

//}

}