md5dlg.cpp

计算字符串的MD5值,可用于密码加密验证

// MD5Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "MD5.h"
#include "MD5Dlg.h"
#include <math.h>
#include <string.h>

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

//产生MD5码所需要用到的数组
const unsigned int s[4][4]={{7,12,17,22},{5,9,14,20},{4,11,16,23},{6,10,15,21}};
const unsigned long t[64]=				//t[i]=4294967296*fabs(sin(i+1))
{
0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee,0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501,
0x698098d8,0x8b44f7af,0xffff5bb1,0x895cd7be,0x6b901122,0xfd987193,0xa679438e,0x49b40821, 
0xf61e2562,0xc040b340,0x265e5a51,0xe9b6c7aa,0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8,
0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed,0xa9e3e905,0xfcefa3f8,0x676f02d9,0x8d2a4c8a,
0xfffa3942,0x8771f681,0x6d9d6122,0xfde5380c,0xa4beea44,0x4bdecfa9,0xf6bb4b60,0xbebfbc70,
0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05,0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665,
0xf4292244,0x432aff97,0xab9423a7,0xfc93a039,0x655b59c3,0x8f0ccc92,0xffeff47d,0x85845dd1,
0x6fa87e4f,0xfe2ce6e0,0xa3014314,0x4e0811a1,0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391
};
const int serial[64]=
{
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
1,6,11,0,5,10,15,4,9,14,3,8,13,2,7,12,
5,8,11,14,1,4,7,10,13,0,3,6,9,12,15,2,
0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9
};

char *dectohex(unsigned long dec)
{
  static char buf[8];
  char cell[] = "0123456789ABCDEF";
  int i = 0;
  memset(buf, 0, 8);
  memset(buf, '0', 8);
  while (dec != 0)
  {
    buf[i++] = cell[dec % 16];
    dec = dec / 16;
  }
  return (strrev(buf));
}

//MD5算法部分
void func(unsigned long& a,unsigned long b,unsigned long c,unsigned long d,unsigned long M,unsigned long t,int s,int turn)
{
	unsigned long temp;
	switch(turn)
	{
		case 0:
			temp=(b&c)|((~b)&d);
			break;
		case 1:
			temp=(d&b)|((~d)&c);
			break;
		case 2:
			temp=b^c^d;
			break;
		case 3:
			temp=c^(b|(~d));
			break;
	}
	temp+=M+t+a;
	_asm 
	{
		mov ecx,s
		rol temp,cl
	}
	a=b+temp;
}

void MD512(const unsigned long M[16],unsigned long hash[4])
{
	int i,j,index=0;
	for(i=0;i<4;i++)
		for(j=0;j<4;j++)
		{
			func(hash[0],hash[1],hash[2],hash[3],M[serial[index]],t[index],s[i][0],i);
			index++;
			func(hash[3],hash[0],hash[1],hash[2],M[serial[index]],t[index],s[i][1],i);
			index++;
			func(hash[2],hash[3],hash[0],hash[1],M[serial[index]],t[index],s[i][2],i);
			index++;
			func(hash[1],hash[2],hash[3],hash[0],M[serial[index]],t[index],s[i][3],i);
			index++;
		}
}

void MD5(char* M,int nLen,unsigned long output[4])
{
	int i,j;
	unsigned long Hash[4]={0x67452301,0xefcdab89,0x98badcfe,0x10325476};
	unsigned long hash[4];

//填充
	__int64 BitsLen=nLen*8;
	int oldlen=nLen;
	while(nLen%64!=56)
	{
		M[nLen++]=0;
	}
	M[oldlen]=(char)0x80;
	*(__int64*)(M+nLen)=BitsLen;
	nLen+=8;

//开始处理分组
	for(i=0;i<nLen;i+=64)
	{
		memcpy(hash,Hash,sizeof(long)*4);
		MD512((const unsigned long*)&M[i],hash);//处理512bits分组
		for(j=0;j<4;j++)
			Hash[j]+=hash[j];
	}

//处理输出。
	for (i=0;i<4;i++)
		for (j=3;j>=0;j--)
		{
			*((char*)(output+i)+j)=*((char*)(Hash+i)+3-j);
		}
}

/////////////////////////////////////////////////////////////////////////////
// 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()

/////////////////////////////////////////////////////////////////////////////
// CMD5Dlg dialog

CMD5Dlg::CMD5Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMD5Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMD5Dlg)
	m_input = _T("");
	m_output = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMD5Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMD5Dlg)
	DDX_Text(pDX, IDC_INPUT, m_input);
	DDX_Text(pDX, IDC_OUTPUT, m_output);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMD5Dlg, CDialog)
	//{{AFX_MSG_MAP(CMD5Dlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDOK, OnProduce)
	ON_BN_CLICKED(IDC_BUTTON1, OnClean)
	ON_BN_CLICKED(IDC_BUTTON2, OnAbout)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMD5Dlg message handlers

BOOL CMD5Dlg::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 CMD5Dlg::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 CMD5Dlg::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 CMD5Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMD5Dlg::OnProduce() 
{
	// TODO: Add your control notification handler code here
	int i;
	unsigned long output[4];
	char str[1000];
	UpdateData();
	strcpy(str,m_input);
	MD5(str,strlen(str),output);
	m_output="";
	for(i=0;i<4;i++)
		m_output+=dectohex(output[i]);
	UpdateData(false);
}

void CMD5Dlg::OnClean() 
{
	// TODO: Add your control notification handler code here
	m_input=m_output="";
	UpdateData(false);
}

void CMD5Dlg::OnAbout() 
{
	// TODO: Add your control notification handler code here
	CAboutDlg dlgAbout;
	dlgAbout.DoModal();
}