// CreateHashCodeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CreateHashCode.h"
#include "CreateHashCodeDlg.h"
#include ".\createhashcodedlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
public:
  afx_msg void OnBnClickedOk();
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}


void CCreateHashCodeDlg::OnBnClickedButton1()
{
  CAboutDlg().DoModal();
}

void CAboutDlg::OnBnClickedOk()
{
  try
  {
    CWaitCursor wait;
    System::Diagnostics::Process::Start(S"IExplore.exe", S"http://www.ArcherConsultingGroup.com/");
  }
  catch(Exception* e)
  {
    MessageBox::Show(e->Message);
  }
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
  ON_BN_CLICKED(IDOK, OnBnClickedOk)
END_MESSAGE_MAP()


// CCreateHashCodeDlg dialog



CCreateHashCodeDlg::CCreateHashCodeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCreateHashCodeDlg::IDD, pParent)
  , m_strInputData(_T("This can be any data string from which you wish to generate a hash code."))
  , m_strSHA1Hash(_T(""))
  , m_strMD5Hash(_T(""))
  , m_strMD5HashSubstring(_T(""))
  , m_iStart(0)
  , m_iLength(0)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCreateHashCodeDlg::DoDataExchange(CDataExchange* pDX)
{
  CDialog::DoDataExchange(pDX);
  DDX_Text(pDX, IDC_EDIT1, m_strInputData);
  DDX_Text(pDX, IDC_EDIT2, m_strSHA1Hash);
  DDX_Text(pDX, IDC_EDIT3, m_strMD5Hash);
  DDX_Text(pDX, IDC_EDIT4, m_strMD5HashSubstring);
  DDX_Text(pDX, IDC_EDIT5, m_iStart);
  DDX_Text(pDX, IDC_EDIT6, m_iLength);
}

BEGIN_MESSAGE_MAP(CCreateHashCodeDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
  ON_BN_CLICKED(IDOK, OnBnClickedOk)
  ON_BN_CLICKED(IDC_BUTTON1, OnBnClickedButton1)
END_MESSAGE_MAP()


// CCreateHashCodeDlg message handlers

BOOL CCreateHashCodeDlg::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 CCreateHashCodeDlg::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 CCreateHashCodeDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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 function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCreateHashCodeDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CCreateHashCodeDlg::OnBnClickedOk()
{
#pragma push_macro("new")
#undef new

  try
  {
    if (UpdateData())
    {
      try
      {
        m_strSHA1Hash = _T("");
        m_strMD5Hash = _T("");
        m_strMD5HashSubstring = _T("");
        UpdateData(FALSE);

        Byte barr[] = new Byte[m_strInputData.GetLength()];
        for(int i = 0; i < m_strInputData.GetLength(); i++)
          barr[i] = static_cast<Byte>(m_strInputData [i]);

        SHA1CryptoServiceProvider* csp1 = new SHA1CryptoServiceProvider();
        MD5CryptoServiceProvider* csp2 = new MD5CryptoServiceProvider();

        Byte hash[];

        //generate the SHA1 hash value
        hash = csp1->ComputeHash(barr);
        m_strSHA1Hash = (CString)BitConverter::ToString(hash);

        //generate the MD5 hash value
        hash = csp2->ComputeHash(barr);
        m_strMD5Hash = (CString)BitConverter::ToString(hash);

        //generate MD5 hash for a substring
        hash = csp2->ComputeHash(barr, m_iStart, m_iLength);
        m_strMD5HashSubstring = (CString)BitConverter::ToString(hash);
      }
      catch(Exception* e)
      {
        MessageBox::Show(e->Message);
      }

      UpdateData(FALSE);
    }
  }
  catch(Exception* e)
  {
    MessageBox::Show(e->Message);
  }
  
#pragma pop_macro("new")
}