2012-02-27 05:48:43 +08:00
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/*
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Copyright (C) 2011-2012 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.Collections.Generic;
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using System.IO;
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using System.Text;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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using de4dot.blocks;
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namespace de4dot.code.deobfuscators.Eazfuscator_NET {
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class StringDecrypter {
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ModuleDefinition module;
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2012-02-27 19:55:37 +08:00
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TypeDefinition stringType;
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MethodDefinition stringMethod;
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2012-02-27 05:48:43 +08:00
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TypeDefinition dataDecrypterType;
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short s1, s2, s3;
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2012-02-27 19:55:37 +08:00
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int i1, i2, i3, i4, i5;
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2012-02-27 05:48:43 +08:00
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bool checkMinus2;
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bool usePublicKeyToken;
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int keyLen;
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byte[] theKey;
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int magic1;
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EmbeddedResource encryptedResource;
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BinaryReader reader;
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2012-02-27 19:55:37 +08:00
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DecrypterType decrypterType;
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2012-03-06 15:17:55 +08:00
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StreamHelperType streamHelperType;
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class StreamHelperType {
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public TypeDefinition type;
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public MethodDefinition readInt16Method;
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public MethodDefinition readInt32Method;
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public MethodDefinition readBytesMethod;
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public bool Detected {
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get {
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return readInt16Method != null &&
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readInt32Method != null &&
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readBytesMethod != null;
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}
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}
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public StreamHelperType(TypeDefinition type) {
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this.type = type;
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foreach (var method in type.Methods) {
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if (method.IsStatic || method.Body == null || method.IsPrivate || method.GenericParameters.Count > 0)
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continue;
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if (DotNetUtils.isMethod(method, "System.Int16", "()"))
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readInt16Method = method;
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else if (DotNetUtils.isMethod(method, "System.Int32", "()"))
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readInt32Method = method;
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else if (DotNetUtils.isMethod(method, "System.Byte[]", "(System.Int32)"))
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readBytesMethod = method;
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}
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}
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}
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2012-02-27 05:48:43 +08:00
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public TypeDefinition Type {
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2012-02-27 19:55:37 +08:00
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get { return stringType; }
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2012-02-27 05:48:43 +08:00
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}
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public EmbeddedResource Resource {
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get { return encryptedResource; }
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}
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public IEnumerable<TypeDefinition> Types {
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get {
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2012-02-27 19:55:37 +08:00
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return new List<TypeDefinition> {
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stringType,
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dataDecrypterType,
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};
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2012-02-27 05:48:43 +08:00
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}
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}
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public MethodDefinition Method {
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2012-02-27 19:55:37 +08:00
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get { return stringMethod; }
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2012-02-27 05:48:43 +08:00
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}
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public bool Detected {
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2012-02-27 19:55:37 +08:00
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get { return stringType != null; }
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2012-02-27 05:48:43 +08:00
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}
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2012-02-27 19:55:37 +08:00
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public StringDecrypter(ModuleDefinition module, DecrypterType decrypterType) {
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2012-02-27 05:48:43 +08:00
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this.module = module;
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2012-02-27 19:55:37 +08:00
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this.decrypterType = decrypterType;
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2012-02-27 05:48:43 +08:00
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}
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2012-02-27 19:55:37 +08:00
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public void find() {
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2012-02-27 05:48:43 +08:00
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foreach (var type in module.Types) {
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2012-03-06 15:17:55 +08:00
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if (!checkType(type))
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2012-02-27 05:48:43 +08:00
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continue;
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foreach (var method in type.Methods) {
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if (!checkDecrypterMethod(method))
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continue;
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2012-02-27 19:55:37 +08:00
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stringType = type;
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stringMethod = method;
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2012-02-27 05:48:43 +08:00
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return;
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}
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}
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}
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2012-03-09 02:21:54 +08:00
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static string[] requiredFieldTypes = new string[] {
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"System.Byte[]",
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"System.Int16",
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};
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2012-03-06 15:17:55 +08:00
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bool checkType(TypeDefinition type) {
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2012-03-09 02:21:54 +08:00
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if (!new FieldTypes(type).all(requiredFieldTypes))
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return false;
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2012-03-06 15:17:55 +08:00
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if (type.NestedTypes.Count == 0) {
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return DotNetUtils.findFieldType(type, "System.IO.BinaryReader", true) != null &&
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DotNetUtils.findFieldType(type, "System.Collections.Generic.Dictionary`2<System.Int32,System.String>", true) != null;
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}
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else if (type.NestedTypes.Count == 3) {
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streamHelperType = findStreamHelperType(type);
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return streamHelperType != null;
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}
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else if (type.NestedTypes.Count == 1) {
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return type.NestedTypes[0].IsEnum;
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}
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else
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return false;
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}
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static string[] streamHelperTypeFields = new string[] {
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"System.IO.Stream",
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"System.Byte[]",
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};
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static StreamHelperType findStreamHelperType(TypeDefinition type) {
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foreach (var field in type.Fields) {
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var nested = field.FieldType as TypeDefinition;
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if (nested == null)
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continue;
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if (nested.DeclaringType != type)
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continue;
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if (!new FieldTypes(nested).exactly(streamHelperTypeFields))
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continue;
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var streamHelperType = new StreamHelperType(nested);
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if (!streamHelperType.Detected)
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continue;
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return streamHelperType;
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}
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return null;
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}
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2012-03-09 02:21:54 +08:00
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static string[] requiredLocalTypes = new string[] {
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"System.Boolean",
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"System.Byte[]",
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"System.Char[]",
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"System.Int16",
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"System.Int32",
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"System.Reflection.Assembly",
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"System.String",
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};
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2012-02-27 05:48:43 +08:00
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static bool checkDecrypterMethod(MethodDefinition method) {
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if (method == null || !method.IsStatic || method.Body == null)
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return false;
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if (!DotNetUtils.isMethod(method, "System.String", "(System.Int32)"))
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return false;
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2012-03-09 02:21:54 +08:00
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if (!new LocalTypes(method).all(requiredLocalTypes))
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return false;
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2012-02-27 05:48:43 +08:00
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foreach (var instr in method.Body.Instructions) {
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if (instr.OpCode != OpCodes.Callvirt)
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continue;
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var calledMethod = instr.Operand as MethodReference;
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if (calledMethod != null && calledMethod.FullName == "System.IO.Stream System.Reflection.Assembly::GetManifestResourceStream(System.String)")
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return true;
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}
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return false;
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}
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2012-02-27 19:55:37 +08:00
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public void initialize(ISimpleDeobfuscator simpleDeobfuscator) {
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if (stringType == null)
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return;
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if (!findConstants(simpleDeobfuscator)) {
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if (encryptedResource == null)
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Log.w("Could not find encrypted resource. Strings cannot be decrypted.");
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else
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Log.w("Can't decrypt strings. Possibly a new Eazfuscator.NET version.");
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return;
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}
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}
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2012-02-29 10:45:43 +08:00
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bool findConstants(ISimpleDeobfuscator simpleDeobfuscator) {
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2012-02-27 19:55:37 +08:00
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if (!findResource(stringMethod))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-02-27 19:55:37 +08:00
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simpleDeobfuscator.deobfuscate(stringMethod);
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2012-02-27 05:48:43 +08:00
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2012-02-27 19:55:37 +08:00
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checkMinus2 = DeobUtils.hasInteger(stringMethod, -2);
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usePublicKeyToken = callsGetPublicKeyToken(stringMethod);
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2012-02-27 05:48:43 +08:00
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2012-02-27 19:55:37 +08:00
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var int64Method = findInt64Method(stringMethod);
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if (int64Method != null)
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decrypterType.Type = int64Method.DeclaringType;
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2012-02-27 05:48:43 +08:00
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2012-02-27 19:55:37 +08:00
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if (!findShorts(stringMethod))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-02-27 19:55:37 +08:00
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if (!findInt3(stringMethod))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-02-27 19:55:37 +08:00
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if (!findInt4(stringMethod))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-02-27 19:55:37 +08:00
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if (checkMinus2 && !findInt5(stringMethod))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-02-27 19:55:37 +08:00
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dataDecrypterType = findDataDecrypterType(stringMethod);
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2012-02-27 05:48:43 +08:00
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if (dataDecrypterType == null)
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return false;
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2012-02-27 19:55:37 +08:00
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if (decrypterType.Detected) {
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2012-03-06 15:17:55 +08:00
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bool initializedAll;
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if (!findInts(stringMethod, out initializedAll))
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2012-02-27 05:48:43 +08:00
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return false;
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2012-03-06 15:17:55 +08:00
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var cctor = DotNetUtils.getMethod(stringType, ".cctor");
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if (!initializedAll && cctor != null) {
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simpleDeobfuscator.deobfuscate(cctor);
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if (!findIntsCctor(cctor))
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return false;
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}
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2012-02-27 19:55:37 +08:00
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if (!decrypterType.initialize())
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2012-02-27 05:48:43 +08:00
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return false;
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}
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initialize();
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return true;
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}
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void initialize() {
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reader = new BinaryReader(encryptedResource.GetResourceStream());
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short len = (short)(reader.ReadInt16() ^ s1);
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if (len != 0)
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theKey = reader.ReadBytes(len);
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else
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keyLen = reader.ReadInt16() ^ s2;
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2012-02-27 19:55:37 +08:00
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if (decrypterType.Detected)
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magic1 = (int)decrypterType.getMagic() ^ i1 ^ i2;
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2012-02-27 05:48:43 +08:00
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}
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public string decrypt(int val) {
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while (true) {
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int offset = magic1 ^ i3 ^ val;
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reader.BaseStream.Position = offset;
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byte[] tmpKey;
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if (theKey == null) {
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tmpKey = reader.ReadBytes(keyLen == -1 ? (short)(reader.ReadInt16() ^ s3 ^ offset) : keyLen);
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2012-02-27 19:55:37 +08:00
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if (decrypterType.Detected) {
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2012-02-27 05:48:43 +08:00
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for (int i = 0; i < tmpKey.Length; i++)
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tmpKey[i] ^= (byte)(magic1 >> ((i & 3) << 3));
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}
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}
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else
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tmpKey = theKey;
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int flags = i4 ^ magic1 ^ offset ^ reader.ReadInt32();
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if (checkMinus2 && flags == -2) {
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var ary2 = reader.ReadBytes(4);
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2012-02-27 19:55:37 +08:00
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val = -(magic1 ^ i5) ^ (ary2[2] | (ary2[0] << 8) | (ary2[3] << 16) | (ary2[1] << 24));
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2012-02-27 05:48:43 +08:00
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continue;
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}
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var bytes = reader.ReadBytes(flags & 0x1FFFFFFF);
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decrypt1(bytes, tmpKey);
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var pkt = module.Assembly.Name.PublicKeyToken;
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if (usePublicKeyToken && pkt != null && pkt.Length != 0) {
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for (int i = 0; i < bytes.Length; i++)
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bytes[i] ^= (byte)((pkt[i & 7] >> 5) + (pkt[i & 7] << 3));
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}
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if ((flags & 0x40000000) != 0)
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bytes = rld(bytes);
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if ((flags & 0x80000000) != 0) {
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var sb = new StringBuilder(bytes.Length);
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foreach (var b in bytes)
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|
|
sb.Append((char)b);
|
|
|
|
|
return sb.ToString();
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
return Encoding.Unicode.GetString(bytes);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static byte[] rld(byte[] src) {
|
|
|
|
|
var dst = new byte[src[2] + (src[3] << 8) + (src[0] << 16) + (src[1] << 24)];
|
|
|
|
|
int srcIndex = 4;
|
|
|
|
|
int dstIndex = 0;
|
|
|
|
|
int flags = 0;
|
|
|
|
|
int bit = 128;
|
|
|
|
|
while (dstIndex < dst.Length) {
|
|
|
|
|
bit <<= 1;
|
|
|
|
|
if (bit == 256) {
|
|
|
|
|
bit = 1;
|
|
|
|
|
flags = src[srcIndex++];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if ((flags & bit) == 0) {
|
|
|
|
|
dst[dstIndex++] = src[srcIndex++];
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int numBytes = (src[srcIndex] >> 2) + 3;
|
|
|
|
|
int copyIndex = dstIndex - ((src[srcIndex + 1] + (src[srcIndex] << 8)) & 0x3FF);
|
|
|
|
|
if (copyIndex < 0)
|
|
|
|
|
break;
|
|
|
|
|
while (dstIndex < dst.Length && numBytes-- > 0)
|
|
|
|
|
dst[dstIndex++] = dst[copyIndex++];
|
|
|
|
|
srcIndex += 2;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return dst;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void decrypt1(byte[] dest, byte[] key) {
|
|
|
|
|
byte b = (byte)((key[1] + 7) ^ (dest.Length + 11));
|
2012-03-10 12:30:57 +08:00
|
|
|
|
uint lcg = (uint)((key[0] | (key[2] << 8)) + (b << 3));
|
2012-02-27 05:48:43 +08:00
|
|
|
|
b += 3;
|
|
|
|
|
ushort xn = 0;
|
|
|
|
|
for (int i = 0; i < dest.Length; i++) {
|
|
|
|
|
if ((i & 1) == 0) {
|
|
|
|
|
lcg = lcgNext(lcg);
|
|
|
|
|
xn = (ushort)(lcg >> 16);
|
|
|
|
|
}
|
|
|
|
|
byte tmp = dest[i];
|
2012-03-10 12:30:57 +08:00
|
|
|
|
dest[i] ^= (byte)(key[1] ^ xn ^ b);
|
2012-02-27 05:48:43 +08:00
|
|
|
|
b = (byte)(tmp + 3);
|
|
|
|
|
xn >>= 8;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static uint lcgNext(uint lcg) {
|
|
|
|
|
return lcg * 214013 + 2531011;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findResource(MethodDefinition method) {
|
|
|
|
|
encryptedResource = DotNetUtils.getResource(module, DotNetUtils.getCodeStrings(method)) as EmbeddedResource;
|
|
|
|
|
return encryptedResource != null;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static MethodDefinition findInt64Method(MethodDefinition method) {
|
|
|
|
|
foreach (var instr in method.Body.Instructions) {
|
|
|
|
|
if (instr.OpCode.Code != Code.Call)
|
|
|
|
|
continue;
|
|
|
|
|
var calledMethod = instr.Operand as MethodDefinition;
|
|
|
|
|
if (calledMethod == null)
|
|
|
|
|
continue;
|
|
|
|
|
if (!DotNetUtils.isMethod(calledMethod, "System.Int64", "()"))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return calledMethod;
|
|
|
|
|
}
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static TypeDefinition findDataDecrypterType(MethodDefinition method) {
|
|
|
|
|
foreach (var instr in method.Body.Instructions) {
|
|
|
|
|
if (instr.OpCode.Code != Code.Call)
|
|
|
|
|
continue;
|
|
|
|
|
var calledMethod = instr.Operand as MethodDefinition;
|
|
|
|
|
if (calledMethod == null)
|
|
|
|
|
continue;
|
|
|
|
|
if (!DotNetUtils.isMethod(calledMethod, "System.Byte[]", "(System.Byte[],System.Byte[])"))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return calledMethod.DeclaringType;
|
|
|
|
|
}
|
|
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findShorts(MethodDefinition method) {
|
|
|
|
|
int index = 0;
|
|
|
|
|
if (!findShort(method, ref index, ref s1))
|
|
|
|
|
return false;
|
|
|
|
|
if (!findShort(method, ref index, ref s2))
|
|
|
|
|
return false;
|
|
|
|
|
if (!findShort(method, ref index, ref s3))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findShort(MethodDefinition method, ref int index, ref short s) {
|
|
|
|
|
if (!findCallReadInt16(method, ref index))
|
|
|
|
|
return false;
|
|
|
|
|
index++;
|
2012-02-27 19:55:37 +08:00
|
|
|
|
return EfUtils.getInt16(method, ref index, ref s);
|
2012-02-27 05:48:43 +08:00
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
bool findInts(MethodDefinition method, out bool initializedAll) {
|
|
|
|
|
initializedAll = false;
|
|
|
|
|
|
|
|
|
|
// <= 3.2
|
|
|
|
|
int index = findIndexInt64Method_v1(method);
|
|
|
|
|
if (index >= 0) {
|
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out i1))
|
|
|
|
|
return false;
|
|
|
|
|
int tmp;
|
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out tmp))
|
|
|
|
|
return false;
|
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out i2))
|
|
|
|
|
return false;
|
2012-02-27 05:48:43 +08:00
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
initializedAll = true;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 3.3
|
|
|
|
|
index = findIndexInt64Method_v2(method);
|
|
|
|
|
if (index >= 0) {
|
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out i2))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findIntsCctor(MethodDefinition cctor) {
|
|
|
|
|
int index = 0;
|
|
|
|
|
if (!findCallGetFrame(cctor, ref index))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return false;
|
2012-03-06 15:17:55 +08:00
|
|
|
|
|
|
|
|
|
int tmp1, tmp2, tmp3;
|
|
|
|
|
if (!EfUtils.getNextInt32(cctor, ref index, out tmp1))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return false;
|
2012-03-06 15:17:55 +08:00
|
|
|
|
if (!EfUtils.getNextInt32(cctor, ref index, out tmp2))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return false;
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
index = 0;
|
|
|
|
|
while (true) {
|
|
|
|
|
if (!EfUtils.getNextInt32(cctor, ref index, out tmp3))
|
|
|
|
|
return false;
|
|
|
|
|
int nextIndex = index;
|
|
|
|
|
int tmp4;
|
|
|
|
|
if (!EfUtils.getNextInt32(cctor, ref index, out tmp4))
|
|
|
|
|
return false;
|
|
|
|
|
if (tmp4 == 16)
|
|
|
|
|
break;
|
|
|
|
|
index = nextIndex;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
i1 = tmp1 ^ tmp2 ^ tmp3;
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findInt3(MethodDefinition method) {
|
2012-02-27 19:55:37 +08:00
|
|
|
|
if (!decrypterType.Detected)
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return findInt3Old(method);
|
|
|
|
|
return findInt3New(method);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// <= 3.1
|
|
|
|
|
bool findInt3Old(MethodDefinition method) {
|
|
|
|
|
var instrs = method.Body.Instructions;
|
|
|
|
|
for (int i = 0; i < instrs.Count - 4; i++) {
|
|
|
|
|
var ldarg0 = instrs[i];
|
|
|
|
|
if (ldarg0.OpCode.Code != Code.Ldarg_0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
var ldci4 = instrs[i + 1];
|
|
|
|
|
if (!DotNetUtils.isLdcI4(ldci4))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
int index = i + 1;
|
|
|
|
|
int value;
|
2012-02-27 19:55:37 +08:00
|
|
|
|
if (!EfUtils.getInt32(method, ref index, out value))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
continue;
|
|
|
|
|
if (index >= instrs.Count)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (instrs[index].OpCode.Code != Code.Xor)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
i3 = value;
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// 3.2+
|
|
|
|
|
bool findInt3New(MethodDefinition method) {
|
|
|
|
|
var instrs = method.Body.Instructions;
|
|
|
|
|
for (int i = 0; i < instrs.Count - 4; i++) {
|
|
|
|
|
var ldarg0 = instrs[i];
|
|
|
|
|
if (ldarg0.OpCode.Code != Code.Ldarg_0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
var ldci4 = instrs[i + 1];
|
|
|
|
|
if (!DotNetUtils.isLdcI4(ldci4))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (instrs[i + 2].OpCode.Code != Code.Xor)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (!DotNetUtils.isLdloc(instrs[i + 3]))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (instrs[i + 4].OpCode.Code != Code.Xor)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
i3 = DotNetUtils.getLdcI4Value(ldci4);
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findInt4(MethodDefinition method) {
|
|
|
|
|
int index = 0;
|
|
|
|
|
if (!findCallReadInt32(method, ref index))
|
|
|
|
|
return false;
|
2012-02-27 19:55:37 +08:00
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out i4))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2012-02-27 19:55:37 +08:00
|
|
|
|
bool findInt5(MethodDefinition method) {
|
2012-02-27 05:48:43 +08:00
|
|
|
|
int index = -1;
|
|
|
|
|
while (true) {
|
|
|
|
|
index++;
|
|
|
|
|
if (!findCallReadBytes(method, ref index))
|
|
|
|
|
return false;
|
|
|
|
|
if (index <= 0)
|
|
|
|
|
continue;
|
|
|
|
|
var ldci4 = method.Body.Instructions[index - 1];
|
|
|
|
|
if (!DotNetUtils.isLdcI4(ldci4))
|
|
|
|
|
continue;
|
|
|
|
|
if (DotNetUtils.getLdcI4Value(ldci4) != 4)
|
|
|
|
|
continue;
|
2012-02-27 19:55:37 +08:00
|
|
|
|
if (!EfUtils.getNextInt32(method, ref index, out i5))
|
2012-02-27 05:48:43 +08:00
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
static int findIndexInt64Method_v1(MethodDefinition method) {
|
2012-02-27 05:48:43 +08:00
|
|
|
|
var instrs = method.Body.Instructions;
|
|
|
|
|
for (int i = 0; i < instrs.Count - 2; i++) {
|
|
|
|
|
var ldci4 = instrs[i];
|
|
|
|
|
if (!DotNetUtils.isLdcI4(ldci4))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
var stloc = instrs[i + 1];
|
|
|
|
|
if (!DotNetUtils.isStloc(stloc))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
var call = instrs[i + 2];
|
|
|
|
|
if (call.OpCode.Code != Code.Call)
|
|
|
|
|
continue;
|
|
|
|
|
var calledMethod = call.Operand as MethodDefinition;
|
|
|
|
|
if (calledMethod == null)
|
|
|
|
|
continue;
|
|
|
|
|
if (!DotNetUtils.isMethod(calledMethod, "System.Int64", "()"))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return i;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
static int findIndexInt64Method_v2(MethodDefinition method) {
|
|
|
|
|
var instrs = method.Body.Instructions;
|
|
|
|
|
for (int i = 0; i < instrs.Count; i++) {
|
|
|
|
|
var call = instrs[i];
|
|
|
|
|
if (call.OpCode.Code != Code.Call)
|
|
|
|
|
continue;
|
|
|
|
|
var calledMethod = call.Operand as MethodDefinition;
|
|
|
|
|
if (calledMethod == null)
|
|
|
|
|
continue;
|
|
|
|
|
if (!DotNetUtils.isMethod(calledMethod, "System.Int64", "()"))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return i;
|
|
|
|
|
}
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
2012-02-27 05:48:43 +08:00
|
|
|
|
static bool callsGetPublicKeyToken(MethodDefinition method) {
|
|
|
|
|
int index = 0;
|
|
|
|
|
return findCall(method, ref index, "System.Byte[] System.Reflection.AssemblyName::GetPublicKeyToken()");
|
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
bool findCallReadInt16(MethodDefinition method, ref int index) {
|
|
|
|
|
return findCall(method, ref index, streamHelperType == null ? "System.Int16 System.IO.BinaryReader::ReadInt16()" : streamHelperType.readInt16Method.FullName);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool findCallReadInt32(MethodDefinition method, ref int index) {
|
|
|
|
|
return findCall(method, ref index, streamHelperType == null ? "System.Int32 System.IO.BinaryReader::ReadInt32()" : streamHelperType.readInt32Method.FullName);
|
2012-02-27 05:48:43 +08:00
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
bool findCallReadBytes(MethodDefinition method, ref int index) {
|
|
|
|
|
return findCall(method, ref index, streamHelperType == null ? "System.Byte[] System.IO.BinaryReader::ReadBytes(System.Int32)" : streamHelperType.readBytesMethod.FullName);
|
2012-02-27 05:48:43 +08:00
|
|
|
|
}
|
|
|
|
|
|
2012-03-06 15:17:55 +08:00
|
|
|
|
static bool findCallGetFrame(MethodDefinition method, ref int index) {
|
|
|
|
|
return findCall(method, ref index, "System.Diagnostics.StackFrame System.Diagnostics.StackTrace::GetFrame(System.Int32)");
|
2012-02-27 05:48:43 +08:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool findCall(MethodDefinition method, ref int index, string methodFullName) {
|
|
|
|
|
for (; index < method.Body.Instructions.Count; index++) {
|
|
|
|
|
if (!findCallvirt(method, ref index))
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
var calledMethod = method.Body.Instructions[index].Operand as MethodReference;
|
|
|
|
|
if (calledMethod == null)
|
|
|
|
|
continue;
|
|
|
|
|
if (calledMethod.ToString() != methodFullName)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool findCallvirt(MethodDefinition method, ref int index) {
|
|
|
|
|
var instrs = method.Body.Instructions;
|
|
|
|
|
for (; index < instrs.Count; index++) {
|
|
|
|
|
var instr = instrs[index];
|
|
|
|
|
if (instr.OpCode.Code != Code.Callvirt)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|