teacodedlg.cpp

tea加密解密算法的应用

// TEACodeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "TEACode.h"
#include "TEACodeDlg.h"
#include "util.h"
#include "tea.h"

using namespace std;

#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()

/////////////////////////////////////////////////////////////////////////////
// CTEACodeDlg dialog

CTEACodeDlg::CTEACodeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTEACodeDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CTEACodeDlg)
	m_Key = _T("");
	m_PlainText = _T("");
	m_CipherText = _T("");
	m_Round = 32;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTEACodeDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CTEACodeDlg)
	DDX_Text(pDX, IDC_EDIT_KEY, m_Key);
	DDX_Text(pDX, IDC_EDIT_PLAINTEXT, m_PlainText);
	DDX_Text(pDX, IDC_EDIT_CIPHERTEXT, m_CipherText);
	DDX_Text(pDX, IDC_EDIT_ROUND, m_Round);
	DDV_MinMaxInt(pDX, m_Round, 16, 128);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CTEACodeDlg, CDialog)
	//{{AFX_MSG_MAP(CTEACodeDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_CRYPT, OnButtonCrypt)
	ON_BN_CLICKED(IDC_BUTTON_DECRYPT, OnButtonDecrypt)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTEACodeDlg message handlers

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

/************************************************************************/
/* 说明：界面输入16进制字符串											*/
/*		 格式:Key---3A DA 75 21 DB E2 DB B3 11 B4 49 01 A5 C6 EA D4		*/
/*		 可以转化网络数据包，进行加密，同时可以选择迭代次数(16倍数)		*/
/* 作者：liuchong														*/
/* 日期：2008.11.19 0:33												*/
/************************************************************************/
void CTEACodeDlg::OnButtonCrypt() 
{
	UpdateData(TRUE);
	if(47 != m_Key.GetLength())
	{
		MessageBox("密钥数据格式有误，请检查！");
		return;
	}
	if(m_Round%16 != 0)
	{
		MessageBox("迭代次数必须是16倍数，请重新输入！");
		return;
	}
	if(23 != m_PlainText.GetLength())
	{
		MessageBox("加密数据格式有误，请检查！");
		return;
	}
	
	string plainStr = m_PlainText.GetBuffer(0);
	string keyStr = m_Key.GetBuffer(0);
	const int SIZE_IN = 8, SIZE_OUT = 8, SIZE_KEY = 16;
	byte plain[SIZE_IN], crypt[SIZE_OUT], key[SIZE_KEY];
	
	size_t size_in = hexStringToBytes(plainStr, plain);
	size_t size_key = hexStringToBytes(keyStr, key);

	if (size_in != SIZE_IN || size_key != SIZE_KEY)
	{
		MessageBox("数据格式有误，请检查！");
		return;
	}

	TEA tea(key, m_Round, false);
	tea.encrypt(plain, crypt);
	m_CipherText = bytesToHexString(crypt, SIZE_OUT).c_str(); ;
	UpdateData(FALSE);
}

void CTEACodeDlg::OnButtonDecrypt() 
{
	UpdateData(TRUE);
	if(47 != m_Key.GetLength())
	{
		MessageBox("密钥数据格式有误，请检查！");
		return;
	}
	if(m_Round%16 != 0)
	{
		MessageBox("迭代次数必须是16倍数，请重新输入！");
		return;
	}
	if(23 != m_CipherText.GetLength())
	{
		MessageBox("解密数据格式有误，请检查！");
		return;
	}

	string cryptStr = m_CipherText.GetBuffer(0);
	string keyStr = m_Key.GetBuffer(0);
	const int SIZE_IN = 8, SIZE_OUT = 8, SIZE_KEY = 16;
	byte plain[SIZE_IN], crypt[SIZE_OUT], key[SIZE_KEY];
	
	size_t size_out = hexStringToBytes(cryptStr, crypt);
	size_t size_key = hexStringToBytes(keyStr, key);
	
	if (size_out != SIZE_OUT || size_key != SIZE_KEY)
	{
		MessageBox("数据格式有误，请检查！");
		return;
	}
	
	TEA tea(key, m_Round, false);
	tea.decrypt(crypt, plain);
	m_PlainText = bytesToHexString(plain, SIZE_IN).c_str(); ;
	UpdateData(FALSE);
}