154 lines
4.6 KiB
C#
154 lines
4.6 KiB
C#
/*
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Copyright (C) 2011-2013 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Threading;
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using dnlib.DotNet;
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using de4dot.blocks;
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using de4dot.mdecrypt;
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namespace AssemblyData {
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public class AssemblyService : MarshalByRefObject, IAssemblyService {
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IStringDecrypter stringDecrypter = null;
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ManualResetEvent exitEvent = new ManualResetEvent(false);
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Assembly assembly = null;
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AssemblyResolver assemblyResolver = new AssemblyResolver();
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bool installCompileMethodCalled = false;
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public void DoNothing() {
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}
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public void Exit() {
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exitEvent.Set();
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}
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public void WaitExit() {
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exitEvent.WaitOne();
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}
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public override object InitializeLifetimeService() {
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return null;
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}
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void CheckStringDecrypter() {
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if (stringDecrypter == null)
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throw new ApplicationException("setStringDecrypterType() hasn't been called yet.");
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}
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void CheckAssembly() {
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if (assembly == null)
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throw new ApplicationException("loadAssembly() hasn't been called yet.");
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}
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public void LoadAssembly(string filename) {
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if (assembly != null)
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throw new ApplicationException("Only one assembly can be explicitly loaded");
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try {
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assembly = assemblyResolver.Load(filename);
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}
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catch (BadImageFormatException) {
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throw new ApplicationException(string.Format("Could not load assembly {0}. Maybe it's 32-bit or 64-bit only?", filename));
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}
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}
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public void SetStringDecrypterType(StringDecrypterType type) {
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if (stringDecrypter != null)
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throw new ApplicationException("StringDecrypterType already set");
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switch (type) {
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case StringDecrypterType.Delegate:
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stringDecrypter = new DelegateStringDecrypter();
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break;
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case StringDecrypterType.Emulate:
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stringDecrypter = new EmuStringDecrypter();
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break;
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default:
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throw new ApplicationException(string.Format("Unknown StringDecrypterType {0}", type));
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}
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}
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public int DefineStringDecrypter(int methodToken) {
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CheckStringDecrypter();
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var methodInfo = FindMethod(methodToken);
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if (methodInfo == null)
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throw new ApplicationException(string.Format("Could not find method {0:X8}", methodToken));
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if (methodInfo.ReturnType != typeof(string) && methodInfo.ReturnType != typeof(object))
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throw new ApplicationException(string.Format("Method return type must be string or object: {0}", methodInfo));
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return stringDecrypter.DefineStringDecrypter(methodInfo);
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}
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public object[] DecryptStrings(int stringDecrypterMethod, object[] args, int callerToken) {
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CheckStringDecrypter();
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var caller = GetCaller(callerToken);
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foreach (var arg in args)
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SimpleData.Unpack((object[])arg);
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return SimpleData.Pack(stringDecrypter.DecryptStrings(stringDecrypterMethod, args, caller));
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}
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MethodBase GetCaller(int callerToken) {
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try {
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return assembly.GetModules()[0].ResolveMethod(callerToken);
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}
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catch {
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return null;
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}
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}
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MethodInfo FindMethod(int methodToken) {
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CheckAssembly();
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foreach (var module in assembly.GetModules()) {
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var method = module.ResolveMethod(methodToken) as MethodInfo;
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if (method != null)
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return method;
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}
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return null;
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}
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public void InstallCompileMethod(DecryptMethodsInfo decryptMethodsInfo) {
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if (installCompileMethodCalled)
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throw new ApplicationException("installCompileMethod() has already been called");
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installCompileMethodCalled = true;
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DynamicMethodsDecrypter.Instance.DecryptMethodsInfo = decryptMethodsInfo;
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DynamicMethodsDecrypter.Instance.InstallCompileMethod();
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}
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public void LoadObfuscator(string filename) {
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LoadAssembly(filename);
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DynamicMethodsDecrypter.Instance.Module = assembly.ManifestModule;
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DynamicMethodsDecrypter.Instance.LoadObfuscator();
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}
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public bool CanDecryptMethods() {
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CheckAssembly();
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return DynamicMethodsDecrypter.Instance.CanDecryptMethods();
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}
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public DumpedMethods DecryptMethods() {
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CheckAssembly();
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return DynamicMethodsDecrypter.Instance.DecryptMethods();
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}
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}
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}
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