156 lines
4.6 KiB
C#
156 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 dnlib.DotNet;
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using de4dot.blocks;
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namespace de4dot.code.deobfuscators.ILProtector {
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public class DeobfuscatorInfo : DeobfuscatorInfoBase {
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public const string THE_NAME = "ILProtector";
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public const string THE_TYPE = "il";
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const string DEFAULT_REGEX = DeobfuscatorBase.DEFAULT_ASIAN_VALID_NAME_REGEX;
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public DeobfuscatorInfo()
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: base(DEFAULT_REGEX) {
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}
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public override string Name {
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get { return THE_NAME; }
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}
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public override string Type {
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get { return THE_TYPE; }
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}
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public override IDeobfuscator CreateDeobfuscator() {
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return new Deobfuscator(new Deobfuscator.Options {
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ValidNameRegex = validNameRegex.Get(),
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});
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}
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protected override IEnumerable<Option> GetOptionsInternal() {
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return new List<Option>() {
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};
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}
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}
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class Deobfuscator : DeobfuscatorBase {
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Options options;
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string obfuscatorName = DeobfuscatorInfo.THE_NAME;
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MainType mainType;
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StaticMethodsDecrypter staticMethodsDecrypter;
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DynamicMethodsRestorer dynamicMethodsRestorer;
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internal class Options : OptionsBase {
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}
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public override string Type {
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get { return DeobfuscatorInfo.THE_TYPE; }
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}
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public override string TypeLong {
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get { return DeobfuscatorInfo.THE_NAME; }
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}
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public override string Name {
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get { return obfuscatorName; }
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}
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public Deobfuscator(Options options)
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: base(options) {
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this.options = options;
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}
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protected override int DetectInternal() {
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return mainType.Detected ? 150 : 0;
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}
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protected override void ScanForObfuscator() {
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mainType = new MainType(module);
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mainType.Find();
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staticMethodsDecrypter = new StaticMethodsDecrypter(module, mainType);
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if (mainType.Detected)
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staticMethodsDecrypter.Find();
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if (mainType.Detected && !staticMethodsDecrypter.Detected)
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dynamicMethodsRestorer = new DynamicMethodsRestorer(module, mainType);
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if (mainType.Detected) {
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if (staticMethodsDecrypter.Detected)
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UpdateObfuscatorNameWith(staticMethodsDecrypter.Version);
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else
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UpdateObfuscatorNameWith(mainType.GetRuntimeVersionString());
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}
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}
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void UpdateObfuscatorNameWith(string version) {
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if (!string.IsNullOrEmpty(version))
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obfuscatorName += " " + version;
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}
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public override void DeobfuscateBegin() {
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base.DeobfuscateBegin();
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if (mainType.Detected) {
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if (staticMethodsDecrypter.Detected) {
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staticMethodsDecrypter.Decrypt();
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RemoveObfuscatorJunk(staticMethodsDecrypter);
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}
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else if (dynamicMethodsRestorer != null) {
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Logger.v("Runtime file versions:");
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Logger.Instance.Indent();
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bool emailMe = false;
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foreach (var info in mainType.RuntimeFileInfos) {
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var version = info.GetVersion();
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emailMe |= version == null && System.IO.File.Exists(info.PathName);
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emailMe |= version != null && version == new Version(1, 0, 7, 0);
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Logger.v("Version: {0} ({1})", version == null ? "UNKNOWN" : version.ToString(), info.PathName);
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}
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Logger.Instance.DeIndent();
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if (emailMe)
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Logger.n("**** Email me this program! de4dot@gmail.com");
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dynamicMethodsRestorer.Decrypt();
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RemoveObfuscatorJunk(dynamicMethodsRestorer);
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}
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else
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Logger.w("New ILProtector version. Can't decrypt methods (yet)");
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}
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}
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void RemoveObfuscatorJunk(MethodsDecrypterBase methodsDecrypter) {
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AddTypesToBeRemoved(methodsDecrypter.DelegateTypes, "Obfuscator method delegate type");
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AddResourceToBeRemoved(methodsDecrypter.Resource, "Encrypted methods resource");
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AddTypeToBeRemoved(mainType.InvokerDelegate, "Invoker delegate type");
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AddFieldToBeRemoved(mainType.InvokerInstanceField, "Invoker delegate instance field");
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foreach (var info in mainType.RuntimeFileInfos)
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AddMethodToBeRemoved(info.ProtectMethod, "Obfuscator 'Protect' init method");
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mainType.CleanUp();
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}
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public override IEnumerable<int> GetStringDecrypterMethods() {
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return new List<int>();
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}
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}
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}
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