用VC编写文件加密程序的源代码.rar_vc给文件加密_xml_加密_文件加密 VC_文件加密 Visual c++

// ecfileDlg.cpp : implementation file // #include "stdafx.h" #include "ecfile.h" #include "ecfileDlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CEcfileDlg dialog CEcfileDlg::CEcfileDlg(CWnd* pParent /*=NULL*/) : CDialog(CEcfileDlg::IDD, pParent) { //{{AFX_DATA_INIT(CEcfileDlg) m_path = _T(""); m_pass = _T(""); //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CEcfileDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CEcfileDlg) DDX_Text(pDX, IDC_PASSWORD, m_path); DDX_Text(pDX, IDC_PASS1, m_pass); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CEcfileDlg, CDialog) //{{AFX_MSG_MAP(CEcfileDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_E, OnE) ON_BN_CLICKED(IDC_D, OnD) ON_BN_CLICKED(IDC_BROW, OnBrow) //}}AFX_MSG_MAP END_MESSAGE_MAP() BOOL CEcfileDlg::OnInitDialog() { CDialog::OnInitDialog(); ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } SetIcon(m_hIcon, TRUE); SetIcon(m_hIcon, FALSE); return TRUE; } void CEcfileDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } void CEcfileDlg::OnPaint() { CDialog::OnPaint(); } HCURSOR CEcfileDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CEcfileDlg::OnE() { UpdateData(TRUE); if(m_path == "") { AfxMessageBox("怎么没有选择要加密的文件就开始加密啊?"); return; } UpdateData(TRUE); if(m_pass == "") { AfxMessageBox("没有写上密码"); return; } if(ecfile(m_path)) { MessageBox("加密成功了已经"); } else { MessageBox("没加密成功"); } } void CEcfileDlg::OnD() { UpdateData(TRUE); if(m_path == "") { AfxMessageBox("怎么没有选择要加密的文件就开始解密啊?"); return; } UpdateData(TRUE); if(m_pass == "") { AfxMessageBox("没有写上密码"); return; } if(dcfile(m_path)) { MessageBox("解密成功了"); } else { MessageBox("解密失败了"); } } void CEcfileDlg::OnBrow() { CFileDialog dlg(TRUE); if(dlg.DoModal() == IDOK) { m_path = dlg.GetPathName(); UpdateData(FALSE); } else { return; } } //给文件加密的函数 BOOL CEcfileDlg::ecfile(LPCTSTR fpath) { char *data; CFile *file; DWORD flen; m_password = epass(); file = new CFile; if ( !file->Open(fpath, CFile::shareDenyNone|CFile::modeReadWrite)) { return FALSE; } flen = file->GetLength(); data = new char[(int)flen]; file->SeekToBegin(); file->Read(data, flen); for(int i=0; i<(int)flen; i++) { data[i] ^= m_password; data[i] ^= flen; } file->SeekToBegin(); file->Write(data, flen); delete[] data; //添加密码验证信息 char cpass[5] = "love"; for(int j=0; j<5; j++) { cpass[j] ^= m_password; } file->SeekToEnd(); file->Write(&cpass, 5); file->Close(); delete file; return TRUE; } //给文件解密的函数 BOOL CEcfileDlg::dcfile(LPCTSTR fpath) { char *data; CFile *file; DWORD flen; char love[5]; file = new CFile; if( !file->Open(fpath, CFile::shareDenyNone|CFile::modeReadWrite)) { return FALSE; } flen = file->GetLength(); data = new char[(int)flen]; //检验密码是不是正确 file->Seek(-5, CFile::end); file->Read(&love, 5); m_password = epass(); for(int i=0; i<5; i++) { love[i] ^= m_password; } if(strcmp(love, "love")!=0) { return FALSE; } //解密 file->SeekToBegin(); file->Read(data, flen); for(int j=0; j<(int)flen; j++) { data[j] ^= m_password; data[j] ^= (flen-5); } file->SeekToBegin(); file->Write(data, flen); file->SetLength(flen-5); file->Close(); delete[] data; delete file; return TRUE; } //获得密码的函数 __int64 CEcfileDlg::epass() { DWORD plen; char *ppass; __int64 mc= 8757735233305; UpdateData(TRUE); ppass = m_pass.GetBuffer(0); plen = strlen(ppass); for(int i=0; i<(int)plen; i++) { mc ^= ppass[i]|128; } return mc; }