sdesdlg.cpp

S－DES加密算法输入为一个8位的明文组和一个10位的密钥

// SDESDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SDES.h"
#include "SDESDlg.h"
#include "SDESImpl.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()

/////////////////////////////////////////////////////////////////////////////
// CSDESDlg dialog

CSDESDlg::CSDESDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSDESDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSDESDlg)
	m_key = _T("");
	m_plainFile = _T("");
	m_cryptograph = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSDESDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSDESDlg)
	DDX_Text(pDX, IDC_KEY, m_key);
	DDX_Text(pDX, IDC_OPENFILE, m_plainFile);
	DDX_Text(pDX, IDC_SAVEFILE, m_cryptograph);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSDESDlg, CDialog)
	//{{AFX_MSG_MAP(CSDESDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BROWSE, OnBrowse)
	ON_BN_CLICKED(IDC_SAVE, OnSave)
	ON_BN_CLICKED(IDC_ENC, OnEnc)
	ON_BN_CLICKED(IDC_DEC, OnDec)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSDESDlg message handlers

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



void CSDESDlg::OnBrowse() 
{
	// 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_plainFile=dlg.GetPathName();
	UpdateData(FALSE);

}


void CSDESDlg::OnSave() 
{
	// 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_cryptograph=dlg.GetPathName();	
	UpdateData(FALSE);
	
}

void CSDESDlg::OnEnc() 
{
		// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	if(m_plainFile=="")return;
	CFile ff(m_plainFile,CFile::modeRead);
	long lFileLen=ff.GetLength();
//	long c=lFileLen/8;
//	long d=lFileLen%8;
	if (m_cryptograph=="")
	m_cryptograph=m_plainFile+".sdes";

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

	
SDESImpl jm;




char inbuff[1],oubuff[1],skey[2];

/*	char *cr=NULL;
for(int j=0;j<16;j++)
 {
CString str=m_filekey.Mid(2*j,2);
skey[j]=unsigned char(strtol(str,&cr,16));
}*/
memcpy(skey,(LPCTSTR)m_key,2);

  //  CTime tm1,tm2;
//	tm1=CTime::GetCurrentTime();

	for(long i=0;i<lFileLen;i++)
	{
		ff.Read(inbuff,1);
		jm.SDESer(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), ENCRYPT);
		fp.Write(oubuff,1);
	}
/*	if(d>0)
	{
		ff.Read(inbuff,d);
		jm.Des_Go(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), ENCRYPT);
		fp.Write(oubuff,8);
	}
    tm2=CTime::GetCurrentTime();
	CTimeSpan tmSpan=tm2-tm1;

	CString strspan=tmSpan.Format("Seconds:%S");
    m_sd=strspan+"s";*/
     
	ff.Close();
	fp.Close();
	AfxMessageBox("加密成功！");
	UpdateData(FALSE);
	
}

void CSDESDlg::OnDec() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	if(m_plainFile=="")return;
	CFile ff(m_plainFile,CFile::modeRead);
	long lFileLen=ff.GetLength();
//	long c=lFileLen/8;
//	long d=lFileLen%8;
	if (m_cryptograph=="")
	m_cryptograph=m_plainFile+".sdes";

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

	
SDESImpl jm;




char inbuff[1],oubuff[1],skey[2];

 memcpy(skey,(LPCTSTR)m_key,2);

//CTime tm1,tm2;
//	tm1=CTime::GetCurrentTime();

for(long i=0;i<lFileLen;i++)
	{
		ff.Read(inbuff,1);
		
        jm.SDESer(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), DECRYPT);
		fp.Write(oubuff,1);
	}
/*	if(d>0)
	{
		AfxMessageBox("文件可能已损坏或非经aes加密过");
	}
    tm2=CTime::GetCurrentTime();
	CTimeSpan tmSpan=tm2-tm1;

	CString strspan=tmSpan.Format("Seconds:%S");

m_sd=strspan+"s";*/
     
	ff.Close();
	fp.Close();
	AfxMessageBox("解密成功！");
	UpdateData(FALSE);	
	
}