我正在尝试了解 easyhook 如何为即将到来的项目工作。为此，我决定尝试在 firefox.exe 进程中劫持 GetMonitorInfoW 和 GetDeviceCaps 以获取 window.screen.width 和 height 以返回疯狂的值。
这是我所做的：
injectorHelperLib.dll：
public class GetDisplayParamsInterface : MarshalByRefObject
{
// Methods
public void IsInstalled(int InClientPID)
{
Console.WriteLine("Display params injector has been installed in target {0}.\r\n", InClientPID);
}
public void Ping()
{
}
}
注入器Lib.dll：
/// <summary>
/// based on interception of calls in nsScreenWin.cpp
/// </summary>
public class InjectorClass : IEntryPoint
{
#region relevant functions
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int Left, Top, Right, Bottom;
public RECT(int left, int top, int right, int bottom)
{
Left = left;
Top = top;
Right = right;
Bottom = bottom;
}
public RECT(System.Drawing.Rectangle r) : this(r.Left, r.Top, r.Right, r.Bottom) { }
public int X
{
get { return Left; }
set { Right -= (Left - value); Left = value; }
}
public int Y
{
get { return Top; }
set { Bottom -= (Top - value); Top = value; }
}
public int Height
{
get { return Bottom - Top; }
set { Bottom = value + Top; }
}
public int Width
{
get { return Right - Left; }
set { Right = value + Left; }
}
public System.Drawing.Point Location
{
get { return new System.Drawing.Point(Left, Top); }
set { X = value.X; Y = value.Y; }
}
public System.Drawing.Size Size
{
get { return new System.Drawing.Size(Width, Height); }
set { Width = value.Width; Height = value.Height; }
}
public static implicit operator System.Drawing.Rectangle(RECT r)
{
return new System.Drawing.Rectangle(r.Left, r.Top, r.Width, r.Height);
}
public static implicit operator RECT(System.Drawing.Rectangle r)
{
return new RECT(r);
}
public static bool operator ==(RECT r1, RECT r2)
{
return r1.Equals(r2);
}
public static bool operator !=(RECT r1, RECT r2)
{
return !r1.Equals(r2);
}
public bool Equals(RECT r)
{
return r.Left == Left && r.Top == Top && r.Right == Right && r.Bottom == Bottom;
}
public override bool Equals(object obj)
{
if (obj is RECT)
return Equals((RECT)obj);
else if (obj is System.Drawing.Rectangle)
return Equals(new RECT((System.Drawing.Rectangle)obj));
return false;
}
public override int GetHashCode()
{
return ((System.Drawing.Rectangle)this).GetHashCode();
}
public override string ToString()
{
return string.Format(System.Globalization.CultureInfo.CurrentCulture, "{{Left={0},Top={1},Right={2},Bottom={3}}}", Left, Top, Right, Bottom);
}
}
[StructLayout(LayoutKind.Sequential)]
private class MONITORINFO
{
public int cbSize;
public RECT rcMonitor;
public RECT rcWork;
public uint dwFlags;
}
[DllImport("user32.dll")]
static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
[UnmanagedFunctionPointer(CallingConvention.StdCall,
CharSet = CharSet.Unicode,
SetLastError = true)]
private delegate bool DGetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
bool GetMonitorInfo_Hook(IntPtr hMonitor, ref MONITORINFO lpmi)
{
var r=GetMonitorInfo(hMonitor, ref lpmi);
//doctor the data
lpmi.rcMonitor.Right = lpmi.rcMonitor.Left + displaySize.Width;
lpmi.rcMonitor.Bottom = lpmi.rcMonitor.Top + displaySize.Height;
lpmi.rcWork.Right = lpmi.rcWork.Left + workAreaSize.Width;
lpmi.rcWork.Bottom = lpmi.rcWork.Top + workAreaSize.Height;
//let's consider the call successfull
return true;
}
[DllImport("gdi32.dll")]
static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
[UnmanagedFunctionPointer(CallingConvention.StdCall,
CharSet = CharSet.Unicode,
SetLastError = true)]
delegate int DGetDeviceCaps(IntPtr hdc, int nIndex);
int GetDeviceCaps_Hook(IntPtr hdc, int nIndex)
{
if (nIndex==(int)DeviceCap.BITSPIXEL)
{
return PixelDepth;
}
if (nIndex==(int)DeviceCap.HORZRES)
{
return displaySize.Width;
}
if(nIndex==(int)DeviceCap.VERTRES)
{
return displaySize.Height;
}
return GetDeviceCaps(hdc, nIndex);
}
enum DeviceCap
{
/// <summary>
/// Device driver version
/// </summary>
DRIVERVERSION = 0,
/// <summary>
/// Device classification
/// </summary>
TECHNOLOGY = 2,
/// <summary>
/// Horizontal size in millimeters
/// </summary>
HORZSIZE = 4,
/// <summary>
/// Vertical size in millimeters
/// </summary>
VERTSIZE = 6,
/// <summary>
/// Horizontal width in pixels
/// </summary>
HORZRES = 8,
/// <summary>
/// Vertical height in pixels
/// </summary>
VERTRES = 10,
/// <summary>
/// Number of bits per pixel
/// </summary>
BITSPIXEL = 12,
/// <summary>
/// Number of planes
/// </summary>
PLANES = 14,
/// <summary>
/// Number of brushes the device has
/// </summary>
NUMBRUSHES = 16,
/// <summary>
/// Number of pens the device has
/// </summary>
NUMPENS = 18,
/// <summary>
/// Number of markers the device has
/// </summary>
NUMMARKERS = 20,
/// <summary>
/// Number of fonts the device has
/// </summary>
NUMFONTS = 22,
/// <summary>
/// Number of colors the device supports
/// </summary>
NUMCOLORS = 24,
/// <summary>
/// Size required for device descriptor
/// </summary>
PDEVICESIZE = 26,
/// <summary>
/// Curve capabilities
/// </summary>
CURVECAPS = 28,
/// <summary>
/// Line capabilities
/// </summary>
LINECAPS = 30,
/// <summary>
/// Polygonal capabilities
/// </summary>
POLYGONALCAPS = 32,
/// <summary>
/// Text capabilities
/// </summary>
TEXTCAPS = 34,
/// <summary>
/// Clipping capabilities
/// </summary>
CLIPCAPS = 36,
/// <summary>
/// Bitblt capabilities
/// </summary>
RASTERCAPS = 38,
/// <summary>
/// Length of the X leg
/// </summary>
ASPECTX = 40,
/// <summary>
/// Length of the Y leg
/// </summary>
ASPECTY = 42,
/// <summary>
/// Length of the hypotenuse
/// </summary>
ASPECTXY = 44,
/// <summary>
/// Shading and Blending caps
/// </summary>
SHADEBLENDCAPS = 45,
/// <summary>
/// Logical pixels inch in X
/// </summary>
LOGPIXELSX = 88,
/// <summary>
/// Logical pixels inch in Y
/// </summary>
LOGPIXELSY = 90,
/// <summary>
/// Number of entries in physical palette
/// </summary>
SIZEPALETTE = 104,
/// <summary>
/// Number of reserved entries in palette
/// </summary>
NUMRESERVED = 106,
/// <summary>
/// Actual color resolution
/// </summary>
COLORRES = 108,
// Printing related DeviceCaps. These replace the appropriate Escapes
/// <summary>
/// Physical Width in device units
/// </summary>
PHYSICALWIDTH = 110,
/// <summary>
/// Physical Height in device units
/// </summary>
PHYSICALHEIGHT = 111,
/// <summary>
/// Physical Printable Area x margin
/// </summary>
PHYSICALOFFSETX = 112,
/// <summary>
/// Physical Printable Area y margin
/// </summary>
PHYSICALOFFSETY = 113,
/// <summary>
/// Scaling factor x
/// </summary>
SCALINGFACTORX = 114,
/// <summary>
/// Scaling factor y
/// </summary>
SCALINGFACTORY = 115,
/// <summary>
/// Current vertical refresh rate of the display device (for displays only) in Hz
/// </summary>
VREFRESH = 116,
/// <summary>
/// Horizontal width of entire desktop in pixels
/// </summary>
DESKTOPVERTRES = 117,
/// <summary>
/// Vertical height of entire desktop in pixels
/// </summary>
DESKTOPHORZRES = 118,
/// <summary>
/// Preferred blt alignment
/// </summary>
BLTALIGNMENT = 119
}
private static Size displaySize = new Size(666, 766);
private static Size workAreaSize = new Size(777, 877);
private int pixelDepth = 666;
public static Size DisplaySize
{
get { return displaySize; }
set { displaySize = value; }
}
public static Size WorkAreaSize
{
get { return workAreaSize; }
set { workAreaSize = value; }
}
public int PixelDepth
{
get { return pixelDepth; }
set { pixelDepth = value; }
}
#endregion
GetDisplayParamsInterface Interface;
private LocalHook getMonitorInfoHook,getDeviceCapsHook;
// Methods
public InjectorClass(RemoteHooking.IContext InContext, string InChannelName)
{
this.Interface = RemoteHooking.IpcConnectClient<GetDisplayParamsInterface>(InChannelName);
this.Interface.Ping();
}
public void Run(RemoteHooking.IContext InContext, string InChannelName)
{
try
{
this.getMonitorInfoHook = LocalHook.Create(LocalHook.GetProcAddress("user32.dll", "GetMonitorInfoW"), new DGetMonitorInfo(GetMonitorInfo_Hook), this);
this.getDeviceCapsHook = LocalHook.Create(LocalHook.GetProcAddress("gdi32.dll", "GetDeviceCaps"), new DGetDeviceCaps(GetDeviceCaps_Hook), this);
this.getMonitorInfoHook.ThreadACL.SetExclusiveACL(new int[1]);
}
catch (Exception exception)
{
this.Interface.ReportException(exception);
return;
}
this.Interface.IsInstalled(RemoteHooking.GetCurrentProcessId());
RemoteHooking.WakeUpProcess();
try
{
while (true)
{
Thread.Sleep(500);
this.Interface.Ping();
}
}
catch
{
}
}
}
文本.exe：
static void Main(string[] args)
{
int pid = 15332;
try
{
RemoteHooking.IpcCreateServer<GetDisplayParamsInterface>(ref ChannelName, WellKnownObjectMode.SingleCall, new WellKnownSidType[0]);
RemoteHooking.Inject(pid, "injectorLib.dll", "injectorLib.dll", new object[] { ChannelName });
Console.ReadLine();
}
catch (Exception exception)
{
Console.WriteLine("There was an error while connecting to target:\r\n{0}", exception.ToString());
}
}
该应用程序似乎已启动并报告附加到该过程，但对window.screen.width我想要影响的任何其他变量没有影响。
我做错了什么？