encryptdattooldlg.cpp

数据加密的工具源代码

// EncryptDatToolDlg.cpp : implementation file
//

#include "stdafx.h"
#include "EncryptDatTool.h"
#include "EncryptDatToolDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

#define MAX_BUFFER 512000

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()

/////////////////////////////////////////////////////////////////////////////
// CEncryptDatToolDlg dialog

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

void CEncryptDatToolDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEncryptDatToolDlg)
	DDX_Control(pDX, IDC_BEFOREENCRYPT, m_befor);
	DDX_Control(pDX, IDC_AFTERENCTYPT, m_after);
	DDX_Control(pDX, IDC_DESCRYPT, m_descrypt);
	DDX_Control(pDX, IDC_ENCRYPT, m_encrypt);
	DDX_Control(pDX, IDC_FILEINFO, m_fileinfo);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CEncryptDatToolDlg, CDialog)
	//{{AFX_MSG_MAP(CEncryptDatToolDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPENFILE, OnOpenfile)
	ON_BN_CLICKED(IDC_ENCRYPT, OnEncrypt)
	ON_BN_CLICKED(IDC_DESCRYPT, OnDescrypt)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEncryptDatToolDlg message handlers

BOOL CEncryptDatToolDlg::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
	m_encrypt.EnableWindow(FALSE);
	m_descrypt.EnableWindow(FALSE);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CEncryptDatToolDlg::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 CEncryptDatToolDlg::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 CEncryptDatToolDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CEncryptDatToolDlg::OnOpenfile() 
{
	CString  strDatFilePath;
	CFileDialog dlg(TRUE,NULL,NULL,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
			"Dat File(*.Dat)|*.Dat|Inx File(*.inx)|*.inx|All Files(*.*)|*.*||");
	if(dlg.DoModal() == IDOK)
	{
		m_strOpenFile = dlg.GetPathName();
	}
	else
		return;
	m_fileinfo.SetWindowText("当前文件: " + m_strOpenFile);
	BeginWaitCursor();
	SetEdit(m_strOpenFile,&m_befor);
	m_encrypt.EnableWindow();
	m_descrypt.EnableWindow();
	EndWaitCursor();
}

void CEncryptDatToolDlg::OnEncrypt() 
{
	BeginWaitCursor();
	CFile file;
	if(!file.Open(m_strOpenFile,CFile::modeRead))
	{
		AfxMessageBox("打开文件失败！");
		return;
	}

	char cHead[18];
	CString strHead;
	memset(cHead,0,sizeof(cHead));
	file.ReadHuge(cHead,16);
	strHead = CString(cHead);
	file.Close();
	if(strHead == "HDHAIJIE..PYTSCA")
	{
		file.Open(m_strOpenFile,CFile::modeReadWrite|CFile::typeBinary);
		char pTemp[8];
		memset(pTemp,0,sizeof(pTemp));
		file.Seek(16,CFile::begin);
		file.Read(pTemp,8);
		long nLength = atol(pTemp);
		nLength *= 24;
		if(m_desm.MakeEncryptDat(&file,24,nLength))
			m_fileinfo.SetWindowText(file.GetFileName() + "  完成加密!");
		else
			m_fileinfo.SetWindowText(file.GetFileName() + "  加密失败!!!!!");
		file.Close();
	}
	else
	{
		file.Open(m_strOpenFile,CFile::modeReadWrite|CFile::typeBinary);
		if(m_desm.MakeEncryptDat(&file,16,file.GetLength() - 16))
			m_fileinfo.SetWindowText(file.GetFileName() + "  完成加密!");
		else
			m_fileinfo.SetWindowText(file.GetFileName() + "  加密失败!!!!!");
		file.Close();
	}
	SetEdit(m_strOpenFile,&m_after);
	m_encrypt.EnableWindow(FALSE);
	EndWaitCursor();
}

void CEncryptDatToolDlg::OnDescrypt() 
{
	BeginWaitCursor();
	CFile file;
	if(!file.Open(m_strOpenFile,CFile::modeRead))
	{
		AfxMessageBox("打开文件失败！");
		return;
	}

	char cHead[18];
	CString strHead;
	memset(cHead,0,sizeof(cHead));
	file.ReadHuge(cHead,16);
	file.Close();
	strHead = CString(cHead);
	unsigned char * pBuffer = (unsigned char *)LocalAlloc(LMEM_FIXED,MAX_BUFFER);
	memset(pBuffer,0,MAX_BUFFER);

	if(strHead == "HDHAIJIE..PYTSCA")
	{
		file.Open(m_strOpenFile,CFile::modeReadWrite|CFile::typeBinary);
		char pTemp[8];
		memset(pTemp,0,sizeof(pTemp));
		file.Seek(16,CFile::begin);
		file.Read(pTemp,8);
		long nLength = atol(pTemp);
		file.Seek(24,CFile::begin);
		nLength *= 24;
		file.ReadHuge(pBuffer,nLength);
		if(m_desm.DecryptDat("00000000",pBuffer,nLength))
			m_fileinfo.SetWindowText(file.GetFileName() + "  解密成功!");
		else
		{
			m_fileinfo.SetWindowText(file.GetFileName() + "  解密失败!!!!!");
			return;
		}
		file.Seek(24,CFile::begin);
		file.WriteHuge(pBuffer,nLength);
	}
	else
	{
		file.Open(m_strOpenFile,CFile::modeReadWrite|CFile::typeBinary);
		file.Seek(16,CFile::begin);
		long lReadLength = file.Read(pBuffer,file.GetLength() - 16);
		
		if(m_desm.DecryptDat("00000000",pBuffer,lReadLength))
			m_fileinfo.SetWindowText(file.GetFileName() + "  解密成功!");
		else
		{
			m_fileinfo.SetWindowText(file.GetFileName() + "  解密失败!!!!!");
			return;
		}
		file.Seek(16,CFile::begin);
		file.WriteHuge(pBuffer,lReadLength);
	}
	file.Close();
	LocalFree(pBuffer);
	SetEdit(m_strOpenFile,&m_after);
	m_descrypt.EnableWindow(FALSE);
	EndWaitCursor();
}

void CEncryptDatToolDlg::SetEdit(CString strFilePath, CEdit *pEdit)
{
	CFile file;
	if(!file.Open(strFilePath,CFile::modeRead))
	{
		pEdit->SetWindowText("打开文件失败!");
		return;
	}

	unsigned char * pBuffer = (unsigned char *)LocalAlloc(LMEM_FIXED,MAX_BUFFER);
	memset(pBuffer,0,MAX_BUFFER);

	long lReadLength = file.ReadHuge(pBuffer,100000);
	long nPos = 0;

	while(1)
	{
		if(nPos >= lReadLength)break;
		if(pBuffer[nPos] == 0x00)
			pBuffer[nPos] = 0x20;
		else
			nPos ++;
	}
	pEdit->SetWindowText(CString(pBuffer));

	LocalFree(pBuffer);
	file.Close();
}