/*
Copyright (C) 2011-2013 de4dot@gmail.com
This file is part of de4dot.
de4dot is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
de4dot is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with de4dot. If not, see .
*/
using System;
using System.Reflection;
using System.Collections.Generic;
using dnlib.DotNet;
using AssemblyData;
namespace de4dot.code.deobfuscators.ILProtector {
sealed class DynamicMethodsDecrypterService : IUserGenericService {
public const int MSG_DECRYPT_METHODS = 0;
public const int MSG_HAS_DELEGATE_TYPE_FLAG = 1;
Module reflObfModule;
ModuleDefMD obfModule;
bool hasDelegateTypeFlag;
[CreateUserGenericService]
public static IUserGenericService Create() {
return new DynamicMethodsDecrypterService();
}
public void Dispose() {
if (obfModule != null)
obfModule.Dispose();
obfModule = null;
}
public void AssemblyLoaded(Assembly assembly) {
this.reflObfModule = assembly.ManifestModule;
this.obfModule = ModuleDefMD.Load(reflObfModule);
}
public object HandleMessage(int msg, object[] args) {
switch (msg) {
case MSG_DECRYPT_METHODS:
return DecryptMethods(args[0] as IList);
case MSG_HAS_DELEGATE_TYPE_FLAG:
return hasDelegateTypeFlag;
default:
throw new ApplicationException(string.Format("Invalid msg: {0:X8}", msg));
}
}
IList DecryptMethods(IList methodIds) {
using (var decrypter = new DynamicMethodsDecrypter(obfModule, reflObfModule)) {
decrypter.Initialize();
var infos = new List();
for (int i = 0; i < methodIds.Count; i += 2)
infos.Add(decrypter.Decrypt(methodIds[i], (uint)methodIds[i + 1]));
hasDelegateTypeFlag = decrypter.MethodReaderHasDelegateTypeFlag;
return infos;
}
}
}
}