[原]VC++信息安全编程（7）分析实现程序自我复制

winston

程序自我复制，是软件程序备份的一种功能，防止程序被修改，被调试，被破解。
详细代码分析如下

2. #ifdef _DEBUG
3. #define new DEBUG_NEW
4. #undef THIS_FILE
5. static char THIS_FILE[] = __FILE__;
6. #endif
8. /////////////////////////////////////////////////////////////////////////////
9. // CCopyMeDlg dialog
11. CCopyMeDlg::CCopyMeDlg(CWnd* pParent /*=NULL*/)
12.         : CDialog(CCopyMeDlg::IDD, pParent)
13. {
14.         //{{AFX_DATA_INIT(CCopyMeDlg)
15.                 // NOTE: the ClassWizard will add member initialization here
16.         //}}AFX_DATA_INIT
17.         // Note that LoadIcon does not require a subsequent DestroyIcon in Win32
18.         m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
19. }
21. void CCopyMeDlg::DoDataExchange(CDataExchange* pDX)
22. {
23.         CDialog::DoDataExchange(pDX);
24.         //{{AFX_DATA_MAP(CCopyMeDlg)
25.                 // NOTE: the ClassWizard will add DDX and DDV calls here
26.         //}}AFX_DATA_MAP
27. }
29. BEGIN_MESSAGE_MAP(CCopyMeDlg, CDialog)
30.         //{{AFX_MSG_MAP(CCopyMeDlg)
31.         ON_WM_PAINT()
32.         ON_WM_QUERYDRAGICON()
33.         ON_BN_CLICKED(IDC_CopyMe, OnCopyMe)
34.         ON_WM_TIMER()
35.         //}}AFX_MSG_MAP
36. END_MESSAGE_MAP()
38. /////////////////////////////////////////////////////////////////////////////
39. // CCopyMeDlg message handlers
41. BOOL CCopyMeDlg::OnInitDialog()
42. {
43.         CDialog::OnInitDialog();
45.         // Set the icon for this dialog.  The framework does this automatically
46.         //  when the application's main window is not a dialog
47.         SetIcon(m_hIcon, TRUE);                        // Set big icon
48.         SetIcon(m_hIcon, FALSE);                // Set small icon
49.        
50.         // TODO: Add extra initialization here
51. char *fPtr=::GetCommandLine();
52. strncpy(name,fPtr,255);
53. for(int i=0;i<256;i++){
54.         if(i>0&&name[i]=='"'){ name[i-1]=0; break; }
55.      name[i]=fPtr[i+1];//去掉 fPtr中引号
56. }
57. i=strlen(name)-1;
59. int len=strlen(name)-1;
60. for(i=len;i>=0;i--){
61.         if(name[i]=='\\')break;
62. }
63. memset(SelfName,0,256);
64. strcpy(SelfName,name+i+1);
65. name[i+1]=0;
67.         return TRUE;  // return TRUE  unless you set the focus to a control
68. }
70. // If you add a minimize button to your dialog, you will need the code below
71. //  to draw the icon.  For MFC applications using the document/view model,
72. //  this is automatically done for you by the framework.
74. void CCopyMeDlg::OnPaint()
75. {
76.         if (IsIconic())
77.         {
78.                 CPaintDC dc(this); // device context for painting
80.                 SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
82.                 // Center icon in client rectangle
83.                 int cxIcon = GetSystemMetrics(SM_CXICON);
84.                 int cyIcon = GetSystemMetrics(SM_CYICON);
85.                 CRect rect;
86.                 GetClientRect(&rect);
87.                 int x = (rect.Width() - cxIcon + 1) / 2;
88.                 int y = (rect.Height() - cyIcon + 1) / 2;
90.                 // Draw the icon
91.                 dc.DrawIcon(x, y, m_hIcon);
92.         }
93.         else
94.         {
95.                 CDialog::OnPaint();
96.         }
97. }
99. // The system calls this to obtain the cursor to display while the user drags
100. //  the minimized window.
101. HCURSOR CCopyMeDlg::OnQueryDragIcon()
102. {
103.         return (HCURSOR) m_hIcon;
104. }
106. void CCopyMeDlg::OnCopyMe()
107. {
109. CString FilePtr=name;
110. //fptr 很长，必须使到空格处中断
112. //MessageBox(fPtr,FilePtr,MB_OK);
113. //CString FilePtr1=fPtr;
114. //CString inf; //可试验出fptr很长
115. //inf.Format("%s,,%d,%d",name,FilePtr.GetLength(),strlen(name));
116. //AfxMessageBox(inf);//
117. //return;
118. HANDLE hFile = {NULL};
119. DWORD dwSize, bytes_read;
120. BYTE *ptr;
121. CString filename=name;
122. filename+=SelfName;
125.         hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
126.                 NULL, OPEN_EXISTING,
127.                 FILE_FLAG_SEQUENTIAL_SCAN, NULL);
128.         if(hFile == INVALID_HANDLE_VALUE)
129.         {
130.                 MessageBox("不能打开文件...\n\n");
131.                 return;
132.         }
133.         dwSize = GetFileSize(hFile, NULL);
134.     ptr=(BYTE*)calloc(1,dwSize);
135.         ReadFile(hFile, ptr, dwSize, &bytes_read, NULL);
136.         CloseHandle(hFile);
138.         CString newFile="c:\";
139.         newFile+=SelfName;
140.         hFile = CreateFile(newFile, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,
141.                 NULL, CREATE_ALWAYS,
142.                 FILE_FLAG_SEQUENTIAL_SCAN, NULL);
143.         if(hFile == INVALID_HANDLE_VALUE)
144.         {
145.                 MessageBox("不能建立文件.\n\n");
146.                 return;
147.         }
148.     WriteFile(hFile, ptr, dwSize, &bytes_read, NULL);
149.         CloseHandle(hFile);
150.     free(ptr);
151.     AfxMessageBox("自我复制成功!");
152. }
156. void CCopyMeDlg::OnTimer(UINT nIDEvent)
157. {
158.         // TODO: Add your message handler code here and/or call default
160.         CDialog::OnTimer(nIDEvent);
161. }

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作者：yincheng01 发表于2011-12-14 23:40:28 原文链接