Add BooleanDecrypter class

de4dot.code/de4dot.code.csproj

@@ -69,6 +69,7 @@
     <Compile Include="deobfuscators\DeobfuscatorInfoBase.cs" />
     <Compile Include="deobfuscators\DeobUtils.cs" />
     <Compile Include="deobfuscators\Dotfuscator\Deobfuscator.cs" />
+    <Compile Include="deobfuscators\dotNET_Reactor\BooleanDecrypter.cs" />
     <Compile Include="deobfuscators\dotNET_Reactor\Deobfuscator.cs" />
     <Compile Include="deobfuscators\dotNET_Reactor\EncryptedResource.cs" />
     <Compile Include="deobfuscators\dotNET_Reactor\LocalTypes.cs" />

de4dot.code/deobfuscators/dotNET_Reactor/BooleanDecrypter.cs

@@ -0,0 +1,80 @@
+/*
+    Copyright (C) 2011 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 Mono.Cecil;
+using de4dot.blocks;
+
+namespace de4dot.deobfuscators.dotNET_Reactor {
+	class BooleanDecrypter {
+		ModuleDefinition module;
+		EncryptedResource encryptedResource;
+		byte[] fileData;
+		byte[] decryptedData;
+
+		public bool Detected {
+			get { return encryptedResource.ResourceDecrypterMethod != null; }
+		}
+
+		public BooleanDecrypter(ModuleDefinition module) {
+			this.module = module;
+			this.encryptedResource = new EncryptedResource(module);
+		}
+
+		public BooleanDecrypter(ModuleDefinition module, BooleanDecrypter oldOne) {
+			this.module = module;
+			this.encryptedResource = new EncryptedResource(module, oldOne.encryptedResource);
+		}
+
+		public void find() {
+			var additionalTypes = new string[] {
+				"System.Boolean",
+			};
+			foreach (var type in module.Types) {
+				if (type.BaseType == null || type.BaseType.FullName != "System.Object")
+					continue;
+				foreach (var method in type.Methods) {
+					if (!method.IsStatic || !method.HasBody)
+						continue;
+					if (!DotNetUtils.isMethod(method, "System.Boolean", "(System.Int32)"))
+						continue;
+					if (!encryptedResource.couldBeResourceDecrypter(method, additionalTypes))
+						continue;
+
+					encryptedResource.ResourceDecrypterMethod = method;
+					break;
+				}
+			}
+		}
+
+		public void init(byte[] fileData, ISimpleDeobfuscator simpleDeobfuscator) {
+			if (encryptedResource.ResourceDecrypterMethod == null)
+				return;
+			this.fileData = fileData;
+
+			encryptedResource.init(simpleDeobfuscator);
+			decryptedData = encryptedResource.decrypt();
+		}
+
+		public bool decrypt(int offset) {
+			uint byteOffset = BitConverter.ToUInt32(decryptedData, offset);
+			return fileData[byteOffset] == 0x80;
+		}
+	}
+}

de4dot.code/deobfuscators/dotNET_Reactor/Deobfuscator.cs

@@ -55,6 +55,7 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
 		byte[] fileData;
 		MethodsDecrypter methodsDecrypter;
 		StringDecrypter stringDecrypter;
+		BooleanDecrypter booleanDecrypter;
 
 		internal class Options : OptionsBase {
 		}
@@ -79,21 +80,29 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
 		protected override int detectInternal() {
 			int val = 0;
 
-			if (methodsDecrypter.Detected)
+			if (methodsDecrypter.Detected || stringDecrypter.Detected || booleanDecrypter.Detected)
 				val += 100;
-			else if (stringDecrypter.Detected)
-				val += 100;
-			if (methodsDecrypter.Detected && stringDecrypter.Detected)
-				val += 10;
+
+			int sum = convert(methodsDecrypter.Detected) +
+					convert(stringDecrypter.Detected) +
+					convert(booleanDecrypter.Detected);
+			if (sum > 1)
+				val += 10 * (sum - 1);
 
 			return val;
 		}
 
+		static int convert(bool b) {
+			return b ? 1 : 0;
+		}
+
 		protected override void scanForObfuscator() {
 			methodsDecrypter = new MethodsDecrypter(module);
 			methodsDecrypter.find();
 			stringDecrypter = new StringDecrypter(module);
 			stringDecrypter.find();
+			booleanDecrypter = new BooleanDecrypter(module);
+			booleanDecrypter.find();
 		}
 
 		public override byte[] getDecryptedModule() {
@@ -112,9 +121,11 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
 		public override IDeobfuscator moduleReloaded(ModuleDefinition module) {
 			var newOne = new Deobfuscator(options);
 			newOne.setModule(module);
+			newOne.fileData = fileData;
 			newOne.peImage = new PE.PeImage(fileData);
 			newOne.methodsDecrypter = new MethodsDecrypter(module, methodsDecrypter);
 			newOne.stringDecrypter = new StringDecrypter(module, stringDecrypter);
+			newOne.booleanDecrypter = new BooleanDecrypter(module, booleanDecrypter);
 			return newOne;
 		}
 
@@ -122,6 +133,7 @@ namespace de4dot.deobfuscators.dotNET_Reactor {
 			base.deobfuscateBegin();
 
 			stringDecrypter.init(peImage, DeobfuscatedFile);
+			booleanDecrypter.init(fileData, DeobfuscatedFile);
 
 			foreach (var info in stringDecrypter.DecrypterInfos) {
 				staticStringDecrypter.add(info.method, (method2, args) => {