// ASYMMETRIC KEY CRYPTOSYSTEMDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ASYMMETRIC KEY CRYPTOSYSTEM.h"
#include "ASYMMETRIC KEY CRYPTOSYSTEMDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CASYMMETRICKEYCRYPTOSYSTEMDlg dialog

CASYMMETRICKEYCRYPTOSYSTEMDlg::CASYMMETRICKEYCRYPTOSYSTEMDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CASYMMETRICKEYCRYPTOSYSTEMDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CASYMMETRICKEYCRYPTOSYSTEMDlg)
	m_introduce = _T("    非對(duì)稱密碼系統(tǒng)（Asymmetric Key Cryptosystem）也被稱作公鑰密碼系統(tǒng)，其思想是由W．Diffie和Hellman在1976年提出的。不同于以往的加密技術(shù)，非對(duì)稱密碼系統(tǒng)是建立在數(shù)學(xué)函數(shù)基礎(chǔ)上的，而不是建立在位方式的操作上的。更重要的是，與只使用單一密鑰的傳統(tǒng)加密技術(shù)相比，它在加/解密時(shí)，分別使用了兩個(gè)不同的密鑰：一個(gè)可對(duì)外界公開，稱為“公鑰”；一個(gè)只有所有者知道，稱為“私鑰”。公鑰和私鑰之間具有緊密聯(lián)系，用公鑰加密的信息只能用相應(yīng)的私鑰解密，反之亦然。同時(shí)，要想由一個(gè)密鑰推知另一個(gè)密鑰，在計(jì)算上是不可能的。                                與對(duì)稱密碼技系統(tǒng)相比較，非對(duì)稱密碼系統(tǒng)具有以下優(yōu)點(diǎn)：          1、通信雙方事先不需要通過(guò)保密信道交換密鑰。                2、密鑰持有量太太減少。                                   3、非對(duì)稱密碼技術(shù)還提供了對(duì)稱密碼技術(shù)無(wú)法或很難提供的          服務(wù)：如與哈希函數(shù)聯(lián)合運(yùn)用可組成數(shù)字簽名，可證明的          安全偽隨機(jī)數(shù)發(fā)生器的構(gòu)造，零知識(shí)證明等。              使用非對(duì)稱密碼系統(tǒng)的主要缺點(diǎn)是：加／解密速度慢、耗用資源大。一般來(lái)說(shuō)，實(shí)用的加／解密方案都綜合運(yùn)用了對(duì)稱密碼技術(shù)和非對(duì)稱密碼技術(shù)。");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CASYMMETRICKEYCRYPTOSYSTEMDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CASYMMETRICKEYCRYPTOSYSTEMDlg)
	DDX_Text(pDX, IDC_introduce, m_introduce);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CASYMMETRICKEYCRYPTOSYSTEMDlg, CDialog)
	//{{AFX_MSG_MAP(CASYMMETRICKEYCRYPTOSYSTEMDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RSA, OnRsa)
	ON_BN_CLICKED(IDC_BIGMUL, OnBigmul)
	ON_BN_CLICKED(IDC_ECC, OnEcc)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CASYMMETRICKEYCRYPTOSYSTEMDlg message handlers

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

void CASYMMETRICKEYCRYPTOSYSTEMDlg::OnRsa() 
{
	// TODO: Add your control notification handler code here
	m_Rsa.DoModal() == IDOK;
}

void CASYMMETRICKEYCRYPTOSYSTEMDlg::OnBigmul() 
{
	// TODO: Add your control notification handler code here
	m_Bigmul.DoModal() == IDOK;
}

void CASYMMETRICKEYCRYPTOSYSTEMDlg::OnEcc() 
{
	// TODO: Add your control notification handler code here
	m_Ecc.DoModal() == IDOK;
}