From 3582b773caaf1c0ca087d27a7050383135438b6b Mon Sep 17 00:00:00 2001
From: de4dot <de4dot@gmail.com>
Date: Mon, 4 Jun 2012 04:20:43 +0200
Subject: [PATCH] Support ILP

---
 de4dot.code/de4dot.code.csproj                |   4 +
 .../deobfuscators/ILProtector/Deobfuscator.cs | 124 +++++++++
 .../deobfuscators/ILProtector/MainType.cs     | 107 +++++++
 .../deobfuscators/ILProtector/MethodReader.cs | 220 +++++++++++++++
 .../ILProtector/MethodsDecrypter.cs           | 263 ++++++++++++++++++
 de4dot.cui/Program.cs                         |   1 +
 6 files changed, 719 insertions(+)
 create mode 100644 de4dot.code/deobfuscators/ILProtector/Deobfuscator.cs
 create mode 100644 de4dot.code/deobfuscators/ILProtector/MainType.cs
 create mode 100644 de4dot.code/deobfuscators/ILProtector/MethodReader.cs
 create mode 100644 de4dot.code/deobfuscators/ILProtector/MethodsDecrypter.cs

diff --git a/de4dot.code/de4dot.code.csproj b/de4dot.code/de4dot.code.csproj
index f1f330ca..770269c1 100644
--- a/de4dot.code/de4dot.code.csproj
+++ b/de4dot.code/de4dot.code.csproj
@@ -67,6 +67,8 @@
     <Compile Include="deobfuscators\Babel_NET\MemberReferenceConverter.cs" />
     <Compile Include="deobfuscators\Babel_NET\MethodBodyReader.cs" />
     <Compile Include="deobfuscators\Babel_NET\MethodReferenceReader.cs" />
+    <Compile Include="deobfuscators\ILProtector\MethodReader.cs" />
+    <Compile Include="deobfuscators\ILProtector\MethodsDecrypter.cs" />
     <Compile Include="deobfuscators\MethodBodyReaderBase.cs" />
     <Compile Include="deobfuscators\Babel_NET\MethodsDecrypter.cs" />
     <Compile Include="deobfuscators\Babel_NET\ProxyDelegateFinder.cs" />
@@ -167,6 +169,8 @@
     <Compile Include="deobfuscators\Eazfuscator_NET\StringDecrypter.cs" />
     <Compile Include="deobfuscators\Eazfuscator_NET\VersionDetector.cs" />
     <Compile Include="deobfuscators\ExceptionLoggerRemover.cs" />
+    <Compile Include="deobfuscators\ILProtector\Deobfuscator.cs" />
+    <Compile Include="deobfuscators\ILProtector\MainType.cs" />
     <Compile Include="deobfuscators\MethodCallRestorerBase.cs" />
     <Compile Include="deobfuscators\Goliath_NET\ArrayDecrypter.cs" />
     <Compile Include="deobfuscators\Goliath_NET\ArrayValueInliner.cs" />
diff --git a/de4dot.code/deobfuscators/ILProtector/Deobfuscator.cs b/de4dot.code/deobfuscators/ILProtector/Deobfuscator.cs
new file mode 100644
index 00000000..1712e339
--- /dev/null
+++ b/de4dot.code/deobfuscators/ILProtector/Deobfuscator.cs
@@ -0,0 +1,124 @@
+/*
+    Copyright (C) 2011-2012 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 <http://www.gnu.org/licenses/>.
+*/
+
+using System;
+using System.Collections.Generic;
+using Mono.Cecil;
+using de4dot.blocks;
+
+namespace de4dot.code.deobfuscators.ILProtector {
+	public class DeobfuscatorInfo : DeobfuscatorInfoBase {
+		public const string THE_NAME = "ILProtector";
+		public const string THE_TYPE = "il";
+
+		public DeobfuscatorInfo()
+			: base() {
+		}
+
+		public override string Name {
+			get { return THE_NAME; }
+		}
+
+		public override string Type {
+			get { return THE_TYPE; }
+		}
+
+		public override IDeobfuscator createDeobfuscator() {
+			return new Deobfuscator(new Deobfuscator.Options {
+				ValidNameRegex = validNameRegex.get(),
+			});
+		}
+
+		protected override IEnumerable<Option> getOptionsInternal() {
+			return new List<Option>() {
+			};
+		}
+	}
+
+	class Deobfuscator : DeobfuscatorBase {
+		Options options;
+		string obfuscatorName = DeobfuscatorInfo.THE_NAME;
+
+		MainType mainType;
+		MethodsDecrypter methodsDecrypter;
+
+		internal class Options : OptionsBase {
+		}
+
+		public override string Type {
+			get { return DeobfuscatorInfo.THE_TYPE; }
+		}
+
+		public override string TypeLong {
+			get { return DeobfuscatorInfo.THE_NAME; }
+		}
+
+		public override string Name {
+			get { return obfuscatorName; }
+		}
+
+		public Deobfuscator(Options options)
+			: base(options) {
+			this.options = options;
+		}
+
+		protected override int detectInternal() {
+			return mainType.Detected ? 150 : 0;
+		}
+
+		protected override void scanForObfuscator() {
+			mainType = new MainType(module);
+			mainType.find();
+			methodsDecrypter = new MethodsDecrypter(module, mainType);
+			methodsDecrypter.find();
+
+			if (mainType.Detected && methodsDecrypter.Detected && methodsDecrypter.Version != null)
+				obfuscatorName += " " + getVersion(methodsDecrypter.Version);
+		}
+
+		static string getVersion(Version version) {
+			if (version.Revision == 0)
+				return string.Format("{0}.{1}.{2}", version.Major, version.Minor, version.Build);
+			return version.ToString();
+		}
+
+		public override void deobfuscateBegin() {
+			base.deobfuscateBegin();
+
+			methodsDecrypter.decrypt();
+			addTypesToBeRemoved(methodsDecrypter.DelegateTypes, "Obfuscator method delegate type");
+			addResourceToBeRemoved(methodsDecrypter.Resource, "Encrypted methods resource");
+			addTypeToBeRemoved(mainType.InvokerDelegate, "Invoker delegate type");
+			addFieldToBeRemoved(mainType.InvokerInstanceField, "Invoker delegate instance field");
+			foreach (var pm in mainType.ProtectMethods) {
+				addMethodToBeRemoved(pm, "Obfuscator 'Protect' init method");
+				addModuleReferenceToBeRemoved(pm.PInvokeInfo.Module, "Obfuscator native protection file");
+			}
+			mainType.cleanUp();
+		}
+
+		public override void deobfuscateEnd() {
+			base.deobfuscateEnd();
+		}
+
+		public override IEnumerable<int> getStringDecrypterMethods() {
+			return new List<int>();
+		}
+	}
+}
diff --git a/de4dot.code/deobfuscators/ILProtector/MainType.cs b/de4dot.code/deobfuscators/ILProtector/MainType.cs
new file mode 100644
index 00000000..70a8724c
--- /dev/null
+++ b/de4dot.code/deobfuscators/ILProtector/MainType.cs
@@ -0,0 +1,107 @@
+/*
+    Copyright (C) 2011-2012 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 <http://www.gnu.org/licenses/>.
+*/
+
+using System.Collections.Generic;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using de4dot.blocks;
+
+namespace de4dot.code.deobfuscators.ILProtector {
+	class MainType {
+		ModuleDefinition module;
+		List<MethodDefinition> protectMethods;
+		TypeDefinition invokerDelegate;
+		FieldDefinition invokerInstanceField;
+
+		public IEnumerable<MethodDefinition> ProtectMethods {
+			get { return protectMethods; }
+		}
+
+		public TypeDefinition InvokerDelegate {
+			get { return invokerDelegate; }
+		}
+
+		public FieldDefinition InvokerInstanceField {
+			get { return invokerInstanceField; }
+		}
+
+		public bool Detected {
+			get { return protectMethods != null; }
+		}
+
+		public MainType(ModuleDefinition module) {
+			this.module = module;
+		}
+
+		public void find() {
+			checkMethod(DotNetUtils.getModuleTypeCctor(module));
+		}
+
+		static string[] ilpLocals = new string[] {
+			"System.Boolean",
+			"System.IntPtr",
+			"System.Object[]",
+		};
+		bool checkMethod(MethodDefinition cctor) {
+			if (cctor == null || cctor.Body == null)
+				return false;
+			if (!new LocalTypes(cctor).exactly(ilpLocals))
+				return false;
+
+			var type = cctor.DeclaringType;
+			var methods = getPinvokeMethods(type, "Protect");
+			if (methods.Count == 0)
+				methods = getPinvokeMethods(type, "P0");
+			if (methods.Count != 2)
+				return false;
+			if (type.Fields.Count != 1)
+				return false;
+
+			var theField = type.Fields[0];
+			var theDelegate = theField.FieldType as TypeDefinition;
+			if (theDelegate == null || !DotNetUtils.derivesFromDelegate(theDelegate))
+				return false;
+
+			protectMethods = methods;
+			invokerDelegate = theDelegate;
+			invokerInstanceField = theField;
+			return true;
+		}
+
+		List<MethodDefinition> getPinvokeMethods(TypeDefinition type, string name) {
+			var list = new List<MethodDefinition>();
+			foreach (var method in type.Methods) {
+				if (method.PInvokeInfo != null && method.PInvokeInfo.EntryPoint == name)
+					list.Add(method);
+			}
+			return list;
+		}
+
+		public void cleanUp() {
+			var cctor = DotNetUtils.getModuleTypeCctor(module);
+			if (cctor != null) {
+				cctor.Body.InitLocals = false;
+				cctor.Body.Variables.Clear();
+				cctor.Body.Instructions.Clear();
+				cctor.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
+				cctor.Body.ExceptionHandlers.Clear();
+			}
+		}
+	}
+}
diff --git a/de4dot.code/deobfuscators/ILProtector/MethodReader.cs b/de4dot.code/deobfuscators/ILProtector/MethodReader.cs
new file mode 100644
index 00000000..d812c5a2
--- /dev/null
+++ b/de4dot.code/deobfuscators/ILProtector/MethodReader.cs
@@ -0,0 +1,220 @@
+/*
+    Copyright (C) 2011-2012 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 <http://www.gnu.org/licenses/>.
+*/
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Mono.Cecil.Metadata;
+using de4dot.blocks;
+
+namespace de4dot.code.deobfuscators.ILProtector {
+	class MethodReader : MethodBodyReaderBase {
+		ModuleDefinition module;
+		MethodFlags flags;
+		TypeDefinition delegateType;
+
+		[Flags]
+		enum MethodFlags {
+			InitLocals = 1,
+			HasLocals = 2,
+			HasInstructions = 4,
+			HasExceptionHandlers = 8,
+		}
+
+		public TypeDefinition DelegateType {
+			get { return delegateType; }
+		}
+
+		public bool InitLocals {
+			get { return (flags & MethodFlags.InitLocals) != 0; }
+		}
+
+		bool HasLocals {
+			get { return (flags & MethodFlags.HasLocals) != 0; }
+		}
+
+		bool HasInstructions {
+			get { return (flags & MethodFlags.HasInstructions) != 0; }
+		}
+
+		bool HasExceptionHandlers {
+			get { return (flags & MethodFlags.HasExceptionHandlers) != 0; }
+		}
+
+		public MethodReader(ModuleDefinition module, byte[] data, IList<ParameterDefinition> parameters)
+			: base(new BinaryReader(new MemoryStream(data))) {
+			this.module = module;
+			this.parameters = parameters;
+		}
+
+		public void read() {
+			flags = (MethodFlags)reader.ReadByte();
+			delegateType = resolve<TypeDefinition>(readTypeToken());
+			if (!DotNetUtils.derivesFromDelegate(delegateType))
+				throw new ApplicationException("Invalid delegate type");
+			if (HasLocals)
+				readLocals(Utils.readEncodedInt32(reader));
+			if (HasInstructions)
+				readInstructions(Utils.readEncodedInt32(reader));
+			if (HasExceptionHandlers)
+				readExceptionHandlers(Utils.readEncodedInt32(reader));
+		}
+
+		int getTypeDefOrRefToken(uint token) {
+			switch (token & 3) {
+			case 0: return 0x02000000 + (int)(token >> 2);
+			case 1: return 0x01000000 + (int)(token >> 2);
+			case 2: return 0x1B000000 + (int)(token >> 2);
+			default: throw new ApplicationException("Invalid token");
+			}
+		}
+
+		void readLocals(int numLocals) {
+			var localsTypes = new List<TypeReference>();
+			for (int i = 0; i < numLocals; i++)
+				localsTypes.Add(readType());
+			setLocals(localsTypes);
+		}
+
+		T resolve<T>(int token) {
+			return (T)module.LookupToken(token);
+		}
+
+		int readTypeToken() {
+			return getTypeDefOrRefToken(Utils.readEncodedUInt32(reader));
+		}
+
+		TypeReference readType() {
+			TypeReference elementType;
+			switch ((ElementType)reader.ReadByte()) {
+			case ElementType.Void: return module.TypeSystem.Void;
+			case ElementType.Boolean: return module.TypeSystem.Boolean;
+			case ElementType.Char: return module.TypeSystem.Char;
+			case ElementType.I1: return module.TypeSystem.SByte;
+			case ElementType.U1: return module.TypeSystem.Byte;
+			case ElementType.I2: return module.TypeSystem.Int16;
+			case ElementType.U2: return module.TypeSystem.UInt16;
+			case ElementType.I4: return module.TypeSystem.Int32;
+			case ElementType.U4: return module.TypeSystem.UInt32;
+			case ElementType.I8: return module.TypeSystem.Int64;
+			case ElementType.U8: return module.TypeSystem.UInt64;
+			case ElementType.R4: return module.TypeSystem.Single;
+			case ElementType.R8: return module.TypeSystem.Double;
+			case ElementType.String: return module.TypeSystem.String;
+			case ElementType.Ptr: return new PointerType(readType());
+			case ElementType.ByRef: return new ByReferenceType(readType());
+			case ElementType.TypedByRef: return module.TypeSystem.TypedReference;
+			case ElementType.I: return module.TypeSystem.IntPtr;
+			case ElementType.U: return module.TypeSystem.UIntPtr;
+			case ElementType.Object: return module.TypeSystem.Object;
+			case ElementType.SzArray: return new ArrayType(readType());
+			case ElementType.Sentinel: return readType();
+			case ElementType.Pinned: return new PinnedType(readType());
+
+			case ElementType.ValueType:
+			case ElementType.Class:
+				return resolve<TypeReference>(readTypeToken());
+
+			case ElementType.Array:
+				elementType = readType();
+				int rank = Utils.readEncodedInt32(reader);
+				return new ArrayType(elementType, rank);
+
+			case ElementType.GenericInst:
+				reader.ReadByte();
+				elementType = resolve<TypeReference>(readTypeToken());
+				int numGenericArgs = Utils.readEncodedInt32(reader);
+				var git = new GenericInstanceType(elementType);
+				for (int i = 0; i < numGenericArgs; i++)
+					git.GenericArguments.Add(readType());
+				return git;
+
+			case ElementType.None:
+			case ElementType.Var:
+			case ElementType.MVar:
+			case ElementType.FnPtr:
+			case ElementType.CModReqD:
+			case ElementType.CModOpt:
+			case ElementType.Internal:
+			case ElementType.Modifier:
+			case ElementType.Type:
+			case ElementType.Boxed:
+			case ElementType.Enum:
+			default:
+				throw new ApplicationException("Invalid local element type");
+			}
+		}
+
+		protected override FieldReference readInlineField(Instruction instr) {
+			return resolve<FieldReference>(reader.ReadInt32());
+		}
+
+		protected override MethodReference readInlineMethod(Instruction instr) {
+			return resolve<MethodReference>(reader.ReadInt32());
+		}
+
+		protected override CallSite readInlineSig(Instruction instr) {
+			throw new NotImplementedException();	//TODO:
+		}
+
+		protected override string readInlineString(Instruction instr) {
+			return module.GetUserString(reader.ReadUInt32() & 0x00FFFFFF);
+		}
+
+		protected override MemberReference readInlineTok(Instruction instr) {
+			return resolve<MemberReference>(reader.ReadInt32());
+		}
+
+		protected override TypeReference readInlineType(Instruction instr) {
+			return resolve<TypeReference>(reader.ReadInt32());
+		}
+
+		protected override ExceptionHandler readExceptionHandler() {
+			var eh = new ExceptionHandler((ExceptionHandlerType)(Utils.readEncodedInt32(reader) & 7));
+
+			int tryOffset = Utils.readEncodedInt32(reader);
+			eh.TryStart = getInstruction(tryOffset);
+			eh.TryEnd = getInstructionOrNull(tryOffset + Utils.readEncodedInt32(reader));
+
+			int handlerOffset = Utils.readEncodedInt32(reader);
+			eh.HandlerStart = getInstruction(handlerOffset);
+			eh.HandlerEnd = getInstructionOrNull(handlerOffset + Utils.readEncodedInt32(reader));
+
+			switch (eh.HandlerType) {
+			case ExceptionHandlerType.Catch:
+				eh.CatchType = resolve<TypeReference>(reader.ReadInt32());
+				break;
+
+			case ExceptionHandlerType.Filter:
+				eh.FilterStart = getInstruction(reader.ReadInt32());
+				break;
+
+			case ExceptionHandlerType.Finally:
+			case ExceptionHandlerType.Fault:
+			default:
+				reader.ReadInt32();
+				break;
+			}
+
+			return eh;
+		}
+	}
+}
diff --git a/de4dot.code/deobfuscators/ILProtector/MethodsDecrypter.cs b/de4dot.code/deobfuscators/ILProtector/MethodsDecrypter.cs
new file mode 100644
index 00000000..087d34a8
--- /dev/null
+++ b/de4dot.code/deobfuscators/ILProtector/MethodsDecrypter.cs
@@ -0,0 +1,263 @@
+/*
+    Copyright (C) 2011-2012 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 <http://www.gnu.org/licenses/>.
+*/
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using de4dot.blocks;
+
+namespace de4dot.code.deobfuscators.ILProtector {
+	class MethodsDecrypter {
+		public static readonly byte[] ilpPublicKeyToken = new byte[8] { 0x20, 0x12, 0xD3, 0xC0, 0x55, 0x1F, 0xE0, 0x3D };
+
+		// This is the first four bytes of ILProtector's public key token
+		const uint RESOURCE_MAGIC = 0xC0D31220;
+
+		ModuleDefinition module;
+		MainType mainType;
+		EmbeddedResource methodsResource;
+		Version ilpVersion;
+		Dictionary<int, MethodInfo2> methodInfos = new Dictionary<int, MethodInfo2>();
+		List<TypeDefinition> delegateTypes = new List<TypeDefinition>();
+
+		class MethodInfo2 {
+			public int id;
+			public int offset;
+			public byte[] data;
+			public MethodInfo2(int id, int offset, int size) {
+				this.id = id;
+				this.offset = offset;
+				this.data = new byte[size];
+			}
+
+			public override string ToString() {
+				return string.Format("{0} {1:X8} 0x{2:X}", id, offset, data.Length);
+			}
+		}
+
+		public EmbeddedResource Resource {
+			get { return methodsResource; }
+		}
+
+		public IEnumerable<TypeDefinition> DelegateTypes {
+			get { return delegateTypes; }
+		}
+
+		public Version Version {
+			get { return ilpVersion; }
+		}
+
+		public bool Detected {
+			get { return methodsResource != null; }
+		}
+
+		public MethodsDecrypter(ModuleDefinition module, MainType mainType) {
+			this.module = module;
+			this.mainType = mainType;
+		}
+
+		public void find() {
+			foreach (var tmp in module.Resources) {
+				var resource = tmp as EmbeddedResource;
+				if (resource == null)
+					continue;
+				var reader = new BinaryReader(resource.GetResourceStream());
+				if (reader.BaseStream.Length < 8)
+					continue;
+				if (reader.ReadUInt32() != RESOURCE_MAGIC)
+					continue;
+				var version = new Version(reader.ReadByte(), reader.ReadByte(), reader.ReadByte(), reader.ReadByte());
+
+				methodsResource = resource;
+				ilpVersion = version;
+				break;
+			}
+		}
+
+		public void decrypt() {
+			if (methodsResource == null)
+				return;
+
+			foreach (var info in readMethodInfos(getMethodsData(methodsResource)))
+				methodInfos[info.id] = info;
+
+			restoreMethods();
+		}
+
+		static byte[] getMethodsData(EmbeddedResource resource) {
+			var reader = new BinaryReader(resource.GetResourceStream());
+			reader.BaseStream.Position += 8;
+			if ((reader.ReadInt32() & 1) != 0)
+				return decompress(reader);
+			else
+				return reader.ReadBytes((int)(reader.BaseStream.Length - reader.BaseStream.Position));
+		}
+
+		static byte[] decompress(BinaryReader reader) {
+			return decompress(reader, ilpPublicKeyToken);
+		}
+
+		static void copy(byte[] src, int srcIndex, byte[] dst, int dstIndex, int size) {
+			for (int i = 0; i < size; i++)
+				dst[dstIndex++] = src[srcIndex++];
+		}
+
+		static byte[] decompress(BinaryReader reader, byte[] key) {
+			var decrypted = new byte[Utils.readEncodedInt32(reader)];
+
+			int destIndex = 0;
+			while (reader.BaseStream.Position < reader.BaseStream.Length) {
+				byte flags = reader.ReadByte();
+				for (int mask = 1; mask != 0x100; mask <<= 1) {
+					if (reader.BaseStream.Position >= reader.BaseStream.Length)
+						break;
+					if ((flags & mask) != 0) {
+						int displ = Utils.readEncodedInt32(reader);
+						int size = Utils.readEncodedInt32(reader);
+						copy(decrypted, destIndex - displ, decrypted, destIndex, size);
+						destIndex += size;
+					}
+					else {
+						byte b = reader.ReadByte();
+						if (key != null)
+							b ^= key[destIndex & 7];
+						decrypted[destIndex++] = b;
+					}
+				}
+			}
+
+			return decrypted;
+		}
+
+		static MethodInfo2[] readMethodInfos(byte[] data) {
+			var reader = new BinaryReader(new MemoryStream(data));
+			int numMethods = Utils.readEncodedInt32(reader);
+			int totalCodeSize = Utils.readEncodedInt32(reader);
+			var methodInfos = new MethodInfo2[numMethods];
+			int offset = 0;
+			for (int i = 0; i < numMethods; i++) {
+				int id = Utils.readEncodedInt32(reader);
+				int size = Utils.readEncodedInt32(reader);
+				methodInfos[i] = new MethodInfo2(id, offset, size);
+				offset += size;
+			}
+			long dataOffset = reader.BaseStream.Position;
+			foreach (var info in methodInfos) {
+				reader.BaseStream.Position = dataOffset + info.offset;
+				reader.BaseStream.Read(info.data, 0, info.data.Length);
+			}
+			return methodInfos;
+		}
+
+		void restoreMethods() {
+			if (methodInfos.Count == 0)
+				return;
+
+			Log.v("Restoring {0} methods", methodInfos.Count);
+			Log.indent();
+			foreach (var type in module.GetTypes()) {
+				foreach (var method in type.Methods) {
+					if (method.Body == null)
+						continue;
+
+					if (restoreMethod(method)) {
+						Log.v("Restored method {0:X8} ({1}). Instrs:{2}, Locals:{3}, Exceptions:{4}",
+							method.MetadataToken.ToInt32(),
+							Utils.removeNewlines(method.FullName),
+							method.Body.Instructions.Count,
+							method.Body.Variables.Count,
+							method.Body.ExceptionHandlers.Count);
+					}
+				}
+			}
+			Log.deIndent();
+			if (methodInfos.Count != 0)
+				Log.w("{0} methods weren't restored", methodInfos.Count);
+		}
+
+		const int INVALID_METHOD_ID = -1;
+		bool restoreMethod(MethodDefinition method) {
+			int methodId = getMethodId(method);
+			if (methodId == INVALID_METHOD_ID)
+				return false;
+
+			var parameters = DotNetUtils.getParameters(method);
+			var methodInfo = methodInfos[methodId];
+			methodInfos.Remove(methodId);
+			var methodReader = new MethodReader(module, methodInfo.data, parameters);
+			methodReader.read();
+
+			restoreMethod(method, methodReader);
+			delegateTypes.Add(methodReader.DelegateType);
+
+			return true;
+		}
+
+		static void restoreMethod(MethodDefinition method, MethodReader methodReader) {
+			var body = method.Body;
+
+			// body.MaxStackSize = <let Mono.Cecil calculate this>
+			body.InitLocals = methodReader.InitLocals;
+
+			body.Variables.Clear();
+			if (methodReader.Locals != null) {
+				foreach (var local in methodReader.Locals)
+					body.Variables.Add(local);
+			}
+
+			body.Instructions.Clear();
+			if (methodReader.Instructions != null) {
+				foreach (var instr in methodReader.Instructions)
+					body.Instructions.Add(instr);
+			}
+
+			body.ExceptionHandlers.Clear();
+			if (methodReader.ExceptionHandlers != null) {
+				foreach (var eh in methodReader.ExceptionHandlers)
+					body.ExceptionHandlers.Add(eh);
+			}
+		}
+
+		int getMethodId(MethodDefinition method) {
+			if (method == null || method.Body == null)
+				return INVALID_METHOD_ID;
+
+			var instrs = method.Body.Instructions;
+			for (int i = 0; i < instrs.Count - 1; i++) {
+				var ldsfld = instrs[i];
+				if (ldsfld.OpCode.Code != Code.Ldsfld)
+					continue;
+
+				var ldci4 = instrs[i + 1];
+				if (!DotNetUtils.isLdcI4(ldci4))
+					continue;
+
+				var field = ldsfld.Operand as FieldDefinition;
+				if (field == null || field != mainType.InvokerInstanceField)
+					continue;
+
+				return DotNetUtils.getLdcI4Value(ldci4);
+			}
+
+			return INVALID_METHOD_ID;
+		}
+	}
+}
diff --git a/de4dot.cui/Program.cs b/de4dot.cui/Program.cs
index a3a5f5ac..4c3bbe95 100644
--- a/de4dot.cui/Program.cs
+++ b/de4dot.cui/Program.cs
@@ -47,6 +47,7 @@ namespace de4dot.cui {
 				new de4dot.code.deobfuscators.dotNET_Reactor.v4.DeobfuscatorInfo(),
 				new de4dot.code.deobfuscators.Eazfuscator_NET.DeobfuscatorInfo(),
 				new de4dot.code.deobfuscators.Goliath_NET.DeobfuscatorInfo(),
+				new de4dot.code.deobfuscators.ILProtector.DeobfuscatorInfo(),
 				new de4dot.code.deobfuscators.MaxtoCode.DeobfuscatorInfo(),
 				new de4dot.code.deobfuscators.Skater_NET.DeobfuscatorInfo(),
 				new de4dot.code.deobfuscators.SmartAssembly.DeobfuscatorInfo(),