sdfshfdlg.cpp

文件加密原码一个简单的加密和解密原码

// sdfshfDlg.cpp : implementation file
//

#include "stdafx.h"
#include "sdfshf.h"
#include "sdfshfDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CSdfshfDlg dialog

CSdfshfDlg::CSdfshfDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSdfshfDlg::IDD, pParent)
{  
	//{{AFX_DATA_INIT(CSdfshfDlg)
	m_file = _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 CSdfshfDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSdfshfDlg)
	DDX_Text(pDX, IDC_EDIT1, m_file);
	DDX_Text(pDX, IDC_EDIT2, m_pass);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSdfshfDlg, CDialog)
	//{{AFX_MSG_MAP(CSdfshfDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDCANCEL2, OnCancel2)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSdfshfDlg message handlers

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

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	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);
		}
	}

	// 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
}

void CSdfshfDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// 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 CSdfshfDlg::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 CSdfshfDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSdfshfDlg::OnOK() 
{
     CFileDialog myfile(TRUE,NULL,NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,NULL,NULL);

if(	myfile.DoModal()==IDOK)
	m_file=myfile.GetPathName();

   UpdateData(FALSE);
	
}

BOOL CSdfshfDlg::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;

	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;

}

BOOL CSdfshfDlg::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];

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;

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 1;




}







_int64 CSdfshfDlg::epass()
{
DWORD plen;
char*ppass;
__int64 mc=8757735233305;
UpdateData();
ppass=m_pass.GetBuffer(0);
plen=strlen(ppass);
for(int i=0;i<(int)plen;i++)
{mc^=ppass[i]|128;
}
return mc;
}

void CSdfshfDlg::OnCancel() 
{
	
	CDialog::OnCancel();
}

void CSdfshfDlg::OnButton1() 
{
 UpdateData();
 
 if(ecfile(m_file))
	 AfxMessageBox("加密成功!");
 else
     AfxMessageBox("失败");
}

void CSdfshfDlg::OnCancel2() 
{    UpdateData();
	if(dcfile(m_file))
		AfxMessageBox("解密成功!");
	else
		AfxMessageBox("失败");
}