des_sysdlg.cpp

des加密解密的实现,能够加密任意文件,任意长度

// DES_SYSDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DES_SYS.h"
#include "DES_SYSDlg.h"
#include "DES.h"
#include "stdlib.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()

/////////////////////////////////////////////////////////////////////////////
// CDES_SYSDlg dialog

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

void CDES_SYSDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDES_SYSDlg)
	DDX_Text(pDX, IDC_EDIT1, m_keyname);
	DDX_Text(pDX, IDC_EDIT2, m_filename);
	DDX_Text(pDX, IDC_EDIT3, m_savefile);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDES_SYSDlg, CDialog)
	//{{AFX_MSG_MAP(CDES_SYSDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON3, Onsefile)
	ON_BN_CLICKED(IDC_BUTTON5, Onsavefile)
	ON_BN_CLICKED(IDC_BUTTON4, OnOnfileenc)
	ON_BN_CLICKED(IDC_BUTTON2, Onfiledec)
	ON_BN_CLICKED(IDC_BUTTON6, OnCreateKey)
	ON_BN_CLICKED(IDC_BUTTON1, OnLoadKey)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDES_SYSDlg message handlers

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

void CDES_SYSDlg::Onsefile() 
{
	// 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_filename=dlg.GetPathName();	
	UpdateData(FALSE);	
}

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

void CDES_SYSDlg::Onsavefile() 
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	CFileDialog dlg(0,NULL,NULL,OFN_HIDEREADONLY ,"All Files(*.*)|*.*||");
	if(IDOK!=dlg.DoModal())return;
	m_savefile=dlg.GetPathName();
	UpdateData(FALSE);	
	
}

void CDES_SYSDlg::OnOnfileenc() 
{
	// TODO: Add your control notification handler code here
UpdateData(TRUE);
if(m_filename=="" || m_keyname== "" || m_savefile == "")
{
	MessageBox("请输入路径");
}
CFile ff(m_filename,CFile::modeRead);
long lFileLen=ff.GetLength();
long c=lFileLen/8;
long d=lFileLen%8;


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




DES jm;




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

/*	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));
}*/
CFile fp1(m_keyname,CFile::modeRead);
char* buf = new char[4];

fp1.Read(buf, 4);

//if(buf == "KEY|")
/*if(!memcmp(buf, "KEY|", 4))
{
	m_filekey = _T("");
	fp1.Read(skey, 8);

}
else
{
	//MessageBox("");
	MessageBox("密钥损坏或无效 ",
			                   "提示",MB_YESNO | MB_ICONQUESTION) ;
	return;
}*/
int count = fp1.GetLength();

int j = 0;
while(j<count)
{
	if ( memcmp(buf, "KEY|",4) == 0 )
		break;
	else 
		fp1.Seek(-3, CFile::current  );
	fp1.Read(buf, 4);
	j++;
}
if ( j>=count )
{
	MessageBox("读取密钥失败");
	return;
}
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);
	}
    
	fp1.Close();
	ff.Close();
	fp.Close();
	AfxMessageBox("加密成功！");
	UpdateData(FALSE);
}



void CDES_SYSDlg::Onfiledec() 
{
	// 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+".aen";


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

//CString inbuff;


DES jm;

 char inbuff[8],oubuff[8],skey[8];
 memset(inbuff, 0, 8);
 memset(oubuff, 0, 8);
 memcpy(skey,(LPCTSTR)m_filekey,8);

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

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);
		memset(inbuff, 0, 8);
		memset(oubuff, 0, 8);
	}
	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");

     
	ff.Close();
	fp.Close();
	AfxMessageBox("解密成功！");
	UpdateData(FALSE);	
}

long suijishu()//产生随机key
	{ 
	long x,y;
	srand( (unsigned)time( NULL ) );//与rand结合使用使每次产生key不同
	x=rand();
	y=rand();
	return 1000*x+y;
	}
void CDES_SYSDlg::OnCreateKey() 
{
	// TODO: Add your control notification handler code here
	char* tmp = new char[8];
	_itoa( suijishu(), tmp, 10 );
	m_filekey = _T(tmp);

	MessageBox("生成成功");
	CFileDialog dlg(0,NULL,NULL,OFN_HIDEREADONLY ,"TXT Files(*.txt)|*.txt||");
 	dlg.m_ofn.lpstrDefExt="txt";
	if(IDOK!=dlg.DoModal())return;
 	m_savefile=dlg.GetPathName();
	
 	CFile fp(m_savefile,CFile::modeCreate|CFile::modeWrite);
    fp.SeekToBegin();
	CString temp = _T("KEY|");
	fp.Write("KEY|",temp.GetLength());
	fp.Write(m_filekey,8);


}

//DEL void CDES_SYSDlg::OnSaveKey() 
//DEL {
//DEL 	// TODO: Add your control notification handler code here
//DEL 	UpdateData(TRUE);
//DEL 	CFileDialog dlg(0,NULL,NULL,OFN_HIDEREADONLY ,"All Files(*.*)|*.*||");
//DEL  	if(IDOK!=dlg.DoModal())return;
//DEL  	m_filename=dlg.GetPathName();
//DEL 	
//DEL  	CFile fp(m_savefile,CFile::modeCreate|CFile::modeWrite);
//DEL     fp.SeekToBegin();
//DEL 	fp.Write("KEY|",sizeof("KEY|"));
//DEL 	fp.Write(m_filekey,8);
//DEL 	UpdateData(FALSE);	
//DEL }

void CDES_SYSDlg::OnLoadKey() 
{
	// 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_keyname=dlg.GetPathName();	
	UpdateData(FALSE);	
}