实验一dlg.cpp

这是一关于DES加密算法的C/C++实现范例

// 实验一Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "实验一.h"
#include "实验一Dlg.h"
#include "DES.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()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg dialog

CMyDlg::CMyDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMyDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMyDlg)
	m_filename = _T("");
	m_filekey = _T("");
	m_savefile = _T("");
	m_display = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMyDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMyDlg)
	DDX_Text(pDX, IDC_EDIT1, m_filename);
	DDX_Text(pDX, IDC_EDIT2, m_filekey);
	DDX_Text(pDX, IDC_EDIT3, m_savefile);
	DDX_Text(pDX, IDC_EDIT4, m_display);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	//{{AFX_MSG_MAP(CMyDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON4, Oninput)
	ON_BN_CLICKED(IDC_BUTTON3, Onsavefile)
	ON_BN_CLICKED(IDC_BUTTON1, OnEncrypt)
	ON_BN_CLICKED(IDC_BUTTON2, Ondecrypt)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDlg message handlers

BOOL CMyDlg::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 CMyDlg::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 CMyDlg::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 CMyDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMyDlg::Oninput() 
{
	

    UpdateData(TRUE);
	CFileDialog dlg(1,NULL,NULL,OFN_HIDEREADONLY ,"All Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	m_filename=dlg.GetPathName();	
	UpdateData(FALSE);
	
	//显示明文于对话框
	char *pbuf;
	m_display="";
	if(m_filename=="")return;
	CFile ff(m_filename,CFile::modeRead);
	long lFileLen=ff.GetLength();
	pbuf=new char[int(lFileLen)];
	ff.Read(pbuf,lFileLen);
	for(long i=0;i<lFileLen;i++)
	{
		m_display+=pbuf[i];	
	}
	UpdateData(FALSE);
	ff.Close();
}

void CMyDlg::Onsavefile() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	CFileDialog dlg(1,NULL,NULL,OFN_HIDEREADONLY ,"All Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	m_savefile=dlg.GetPathName();	
	UpdateData(FALSE);	
}



void CMyDlg::OnEncrypt() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	if(m_filename=="") return;
	CFile ff(m_filename,CFile::modeRead);
	long lFileLen=ff.GetLength();
	long c=lFileLen/8;
	long d=lFileLen%8;
	if (m_savefile=="")
	m_savefile=m_filename+".ecp";


	CFile fp(m_savefile,CFile::modeCreate|CFile::modeWrite);
	fp.SeekToBegin();
	ff.SeekToBegin();

//CString inbuff;


	DES jm;

	char inbuff[8],oubuff[8],skey[8];
	memcpy(skey,(LPCTSTR)m_filekey,8);

	for(long i=0;i<c;i++)
	{
		ff.Read(inbuff,8);
		jm.Des_Go(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), ENCRYPT);
		fp.Write(oubuff,8);
	}
	if(d>0)
	{
		ff.Read(inbuff,d);
		jm.Des_Go(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), ENCRYPT);
		fp.Write(oubuff,8);
	}
	ff.Close();
	fp.Close();

	//显示密文于对话框
	char *pbuf;
	m_display="";
	CFile fd(m_savefile,CFile::modeRead);
	lFileLen=fd.GetLength();
	pbuf=new char[int(lFileLen)];
	fd.Read(pbuf,lFileLen);
	for(i=0;i<lFileLen;i++)
	{
		m_display+=pbuf[i];	
	}
	fd.Close();
	
	AfxMessageBox("加密成功！");
	UpdateData(FALSE);
}

void CMyDlg::Ondecrypt() 
{
	UpdateData(TRUE);
	if(m_filename=="")return;
	CFile ff(m_filename,CFile::modeRead);
	long lFileLen=ff.GetLength();
	long c=lFileLen/8;
	long d=lFileLen%8;
	if (m_savefile=="")
	m_savefile=m_filename+".dcp";


	CFile fp(m_savefile,CFile::modeCreate|CFile::modeWrite);
	fp.SeekToBegin();
	ff.SeekToBegin();

//CString inbuff;


	DES jm;

	char inbuff[8],oubuff[8],skey[8];

	memcpy(skey,(LPCTSTR)m_filekey,8);


	for(long i=0;i<c;i++)
	{
		ff.Read(inbuff,8);
        jm.Des_Go(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), DECRYPT);
		fp.Write(oubuff,8);
	}
	if(d>0)
	{
		AfxMessageBox("文件可能已损坏或非经aes加密过");
	}    
	ff.Close();
	fp.Close();

	//显示解密密文于对话框
	char *pbuf;
	m_display="";
	CFile fd(m_savefile,CFile::modeRead);
	lFileLen=fd.GetLength();
	pbuf=new char[int(lFileLen)];
	fd.Read(pbuf,lFileLen);
	for(i=0;i<lFileLen;i++)
	{
		m_display+=pbuf[i];	
	}
	fd.Close();
	
	AfxMessageBox("解密成功！");
	UpdateData(FALSE);		
}