stringdlg.cpp

3DES加密算法：密钥长度不足24字节时

// StringDlg.cpp : implementation file
//

#include "stdafx.h"
#include "DES.h"
#include "String.h"
#include "StringDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CStringDlg dialog

CStringDlg::CStringDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CStringDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CStringDlg)
	m_length = 0;
	m_key = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CStringDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CStringDlg)
	DDX_Control(pDX, IDC_EDIT_CODE, m_editCode);
	DDX_Control(pDX, IDC_EDIT_ORIGIN, m_editOrigin);
	DDX_Text(pDX, IDC_EDIT3, m_length);
	DDX_Text(pDX, IDC_EDIT_KEY, m_key);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CStringDlg, CDialog)
	//{{AFX_MSG_MAP(CStringDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BTN_DES, OnBtnDes)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CStringDlg message handlers

BOOL CStringDlg::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
	SetDlgItemText(IDC_EDIT_KEY, "");
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

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

void CStringDlg::OnBtnDes() 
{
	// TODO: Add your control notification handler code here
	char szOrigin[1024];
	memset(szOrigin, 0, 1024);
	GetDlgItemText(IDC_EDIT_ORIGIN, m_strOrigin);
	m_length = m_strOrigin.GetLength();
	SetDlgItemInt(IDC_EDIT3, m_length, FALSE);
	memcpy(szOrigin, (LPSTR)(LPCTSTR)m_strOrigin, m_length);
	// sprintf(szOrigin, "%s", m_strOrigin); 
													//去空格用的临时字符
	char key[25];
	key[24] = '\0';
	memset(key, '0', 24);
	GetDlgItemText(IDC_EDIT_KEY, m_key);
	memcpy(key, (LPSTR)(LPCTSTR)m_key, m_key.GetLength());

//	m_strCode += "\0";
//	m_lengthCode = m_strCode.GetLength();

	
//	LPTSTR strcode,  padstr, endstr;							//作为加密时的参数，因为RunDes和
//	strcode = m_strCode.GetBuffer(0);							//RunPad函数接受的字符串都是char*型
//	padstr = m_strPad.GetBuffer(0);								//所以我们将CString类的字符串的首地址
//	endstr = m_strCodeEnd.GetBuffer(0);							//赋给这些临时变量，当作参数传递
	
	char szFilled[1024];
	memset(szFilled, 0, 1024);
	char szResult[1024];
	memset(szResult, 0, 1024);

	m_des.RunPad(m_des.PAD_PKCS_7, szOrigin, m_length, szFilled, m_padLen);

	if (m_des.RunDes(m_des.ENCRYPT, m_des.ECB, szFilled, szResult, m_padLen, key, 24))
	{
		memset(szResult + m_padLen, 0, 1);
		memcpy((LPSTR)(LPCTSTR)m_strCode, szResult, m_padLen + 1);
		AfxMessageBox(m_strCode);
		ASC_HEX(m_strCode, m_strCodeEnd);
	}
	
	m_strCodeEnd +="\0";
	m_strCodeEnd.MakeUpper();
	
	m_lastLength = strlen((LPSTR)(LPCTSTR)m_strCode);//m_strCode.GetLength();

	SetDlgItemInt(IDC_EDIT1, m_padLen, FALSE);
	SetDlgItemInt(IDC_EDIT2, m_lastLength, FALSE);
	SetDlgItemText(IDC_EDIT_CODE, m_strCodeEnd);	
}

void CStringDlg::ASC_HEX(CString strAsc, CString& strHex)
{
	unsigned char szHex[4096];
	memset(szHex, 0, 4096);
	unsigned char szAsc[4096];
	memset(szAsc, 0, 4096);
	int nIndex = 0;
	unsigned char szHexTemp[3];
	memset(szHexTemp, 0, sizeof(szHexTemp));

	//UpdateData(TRUE);
	int length = strAsc.GetLength();
	memcpy(szAsc, (LPSTR)(LPCSTR)strAsc, length);
	while (nIndex < length)
	{
		memset(szHexTemp, 0, sizeof(szHexTemp));
		unsigned int nTemp = (int)szAsc[nIndex];
		//sprintf((char*)szHexTemp, "%02x", nTemp);
		itoa(nTemp, (char*)szHexTemp, 16);
		if(strlen((char*)szHexTemp) < 2)
		{
			szHexTemp[1] = szHexTemp[0];
			szHexTemp[0] = '0';
			szHexTemp[2] = '\0';
		}
		strcat((char*)szHex, (char*)szHexTemp);
		nIndex++;
	}
	strcpy((LPSTR)(LPCSTR)strHex, (char*)szHex);
}