deslxpdlg.cpp

有关用DES加解密算法的

// DESlxpDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DESlxp.h"
#include "DESlxpDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CDESlxpDlg dialog

CDESlxpDlg::CDESlxpDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDESlxpDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDESlxpDlg)
	m_plain = _T("12345678");
	m_key = _T("12345678");
	m_enc = _T("");
	m_back = _T("");
	m_pass = _T("");
	m_path = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDESlxpDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDESlxpDlg)
	DDX_Text(pDX, IDC_EDIT1, m_plain);
	DDX_Text(pDX, IDC_EDIT2, m_key);
	DDX_Text(pDX, IDC_EDIT3, m_enc);
	DDX_Text(pDX, IDC_EDIT4, m_back);
	DDX_Text(pDX, IDC_PASS1, m_pass);
	DDX_Text(pDX, IDC_PASSWORD, m_path);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDESlxpDlg, CDialog)
	//{{AFX_MSG_MAP(CDESlxpDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BROW, OnBrow)
	ON_BN_CLICKED(IDC_D, OnD)
	ON_BN_CLICKED(IDC_E, OnE)
	ON_WM_CTLCOLOR()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDESlxpDlg message handlers

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

void CDESlxpDlg::OnButton1() 
{
	
		UpdateData(TRUE);
/*int z = m_plain.GetLength();
char *inbuff= new  char[z];
char *skey= new  char[z];
char *oubuff= new  char[z];
for(int i=0;i<z;i++)
{
inbuff[i] =m_plain[i];
skey[i]=m_key[i];
}*/

    char skey[32];
    char inbuff[32],oubuff[32];
	memcpy(skey,(LPCTSTR)m_key,8);
	memcpy(inbuff,(LPCTSTR)m_plain,8);

CString strTmp,str;

DES jm	;
jm.Des_Go(oubuff, inbuff, sizeof(inbuff), skey,sizeof(skey), ENCRYPT);

//for (int c = 0; c<32; ++c)
 //       {
		 // strdemo=strdemo+State[c][r]+" ";
//		  strTmp.Format("%02x",oubuff[c]);
//		str+=strTmp+" ";
//		}
//MessageBox(str);	
for(int i=0;i<32;i++)
  str+=oubuff[i];     

m_enc=str;
UpdateData(FALSE);
}

void CDESlxpDlg::OnButton2() 
{
	UpdateData(TRUE);
/*	int z = m_enc.GetLength();
char *inbuff= new char[z];
char *skey= new char[z];
char *oubuff= new char[z];
for(int i=0;i<z;i++)
{
inbuff[i] =m_enc[i];
skey[i]=m_key[i];
}*/
char skey[32];
    char inbuff[32],oubuff[32];
	memcpy(skey,(LPCTSTR)m_key,8);
	memcpy(inbuff,(LPCTSTR)m_enc,8);

CString strTmp,str;
DES jm	;


jm.Des_Go(oubuff, inbuff, sizeof(inbuff),skey, sizeof(skey),  DECRYPT);

for(int i=0;i<8;i++)
  str +=oubuff[i];
     

m_back=str;
UpdateData(FALSE);	
}












void CDESlxpDlg::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 CDESlxpDlg::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 CDESlxpDlg::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 CDESlxpDlg::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 CDESlxpDlg::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 CDESlxpDlg::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;
}



HBRUSH CDESlxpDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
	HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
	
	// TODO: Change any attributes of the DC here
	
	// TODO: Return a different brush if the default is not desired
 switch(pWnd->GetDlgCtrlID())  
    {  
  /* case IDC_STATIC://控件定义的资源名  
        pDC->SetTextColor(RGB(255,0,0));  
        pDC->SetBkColor(RGB(0,255,0));  
        break; */ 
    case IDC_EDIT1:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;  
    case IDC_EDIT2:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;  
    case IDC_EDIT3:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;
	case IDC_EDIT4:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;  
	case IDC_PASS1:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;  
	case IDC_PASSWORD:  
        pDC->SetTextColor(RGB(0,0,255));  
        break;  
    }  

	return hbr;
}