private HostConnectionData()
{
_state = ConnectionState.Invalid;
_helperInterface = null;
_remoteInfo = null;
_unmanagedInfo = null;
}
private static void Install()
{
lock (ThreadSafe)
{
// Ensure we create a new one if the existing
// channel cannot be pinged
try
{
if (m_Interface != null)
{
m_Interface.Ping();
}
}
catch
{
m_Interface = null;
}
if (m_Interface == null)
{
String ChannelName = RemoteHooking.GenerateName();
String SvcExecutablePath = (Config.DependencyPath.Length > 0 ? Config.DependencyPath : Config.GetProcessPath()) + Config.GetWOW64BypassExecutableName();
Process Proc = new Process();
ProcessStartInfo StartInfo = new ProcessStartInfo(
SvcExecutablePath, "\"" + ChannelName + "\"");
// create sync objects
EventWaitHandle Listening = new EventWaitHandle(
false,
EventResetMode.ManualReset,
"Global\\Event_" + ChannelName);
m_TermMutex = new Mutex(true, "Global\\Mutex_" + ChannelName);
// start and connect program
StartInfo.CreateNoWindow = true;
StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
Proc.StartInfo = StartInfo;
Proc.Start();
if (!Listening.WaitOne(5000, true))
{
throw new ApplicationException("Unable to wait for service application due to timeout.");
}
HelperServiceInterface Interface = RemoteHooking.IpcConnectClient <HelperServiceInterface>(ChannelName);
Interface.Ping();
m_Interface = Interface;
}
}
}
private static void Install()
{
lock (ThreadSafe)
{
// Ensure we create a new one if the existing
// channel cannot be pinged
try
{
if (m_Interface != null)
{
m_Interface.Ping();
}
}
catch
{
m_Interface = null;
}
if (m_Interface == null)
{
// create sync objects
String ChannelName = RemoteHooking.GenerateName();
EventWaitHandle Listening = new EventWaitHandle(
false,
EventResetMode.ManualReset,
"Global\\Event_" + ChannelName);
Mutex TermMutex = new Mutex(true, "Global\\Mutex_" + ChannelName);
using (TermMutex)
{
// install and start service
NativeAPI.RtlInstallService(
"EasyHook" + (NativeAPI.Is64Bit?"64":"32") + "Svc",
Path.GetFullPath(Config.GetDependantSvcExecutableName()),
ChannelName);
if (!Listening.WaitOne(5000, true))
{
throw new ApplicationException("Unable to wait for service startup.");
}
HelperServiceInterface Interface = RemoteHooking.IpcConnectClient <HelperServiceInterface>(ChannelName);
Interface.Ping();
// now we can be sure that all things are fine...
m_Interface = Interface;
m_TermMutex = TermMutex;
}
}
}
}
/// <summary>
/// Loads the user library (trying the strong name first, then the file name),
/// creates an instance for the <see cref="IEntryPoint"/> specified in the library
/// and invokes the Run() method specified in that instance.
/// </summary>
/// <param name="userLibraryStrongName">The assembly strong name provided by the user, located in the global assembly cache.</param>
/// <param name="userLibraryFileName">The assembly file name provided by the user to be loaded.</param>
/// <param name="paramArray">Array of parameters to use with the constructor and with the Run() method. Note that all but the first parameter should be binary encoded.</param>
/// <param name="helperServiceInterface"><see cref="HelperServiceInterface"/> to use for reporting to the host side.</param>
/// <returns>The exit code to be returned by the main() method.</returns>
private static int LoadUserLibrary(string userLibraryStrongName, string userLibraryFileName, object[] paramArray, HelperServiceInterface helperServiceInterface)
{
Type entryPoint = null;
MethodInfo runMethod;
object instance;
// 1. Load the assembly and find the EasyHook.IEntryPoint and matching Run() method
try
{
// Load the given assembly and find the first EasyHook.IEntryPoint
entryPoint = FindEntryPoint(userLibraryStrongName, userLibraryFileName);
// Only attempt to deserialise parameters after we have loaded the userAssembly
// this allows types from the userAssembly to be passed as parameters
BinaryFormatter format = new BinaryFormatter();
format.Binder = new AllowAllAssemblyVersionsDeserializationBinder(entryPoint.Assembly);
for (int i = 1; i < paramArray.Length; i++)
{
using (MemoryStream ms = new MemoryStream((byte[])paramArray[i]))
{
paramArray[i] = format.Deserialize(ms);
}
}
// Determine if a Run() method is defined with matching parameters, before initializing an instance for the type.
runMethod = FindMatchingMethod(entryPoint, "Run", paramArray);
if (runMethod == null)
{
throw new MissingMethodException(ConstructMissingMethodExceptionMessage("Run", paramArray));
}
// Initialize an object for the entrypoint.
instance = InitializeInstance(entryPoint, paramArray);
if (instance == null)
{
throw new MissingMethodException(ConstructMissingMethodExceptionMessage(entryPoint.Name, paramArray));
}
// Notify the host about successful injection.
helperServiceInterface.InjectionCompleted(RemoteHooking.GetCurrentProcessId());
}
catch (Exception e)
{
// Provide error information on host side.
try
{
helperServiceInterface.InjectionException(RemoteHooking.GetCurrentProcessId(), e);
}
finally
{
Release(entryPoint);
}
return(-1);
}
// 2. Invoke the Run() method
try
{
// After this it is safe to enter the Run() method, which will block until assembly unloading...
// From now on the user library has to take care about error reporting!
runMethod.Invoke(instance, BindingFlags.Public | BindingFlags.Instance | BindingFlags.ExactBinding |
BindingFlags.InvokeMethod, null, paramArray, null);
}
finally
{
Release(entryPoint);
}
return(0);
}
