120 lines
3.1 KiB
C#
120 lines
3.1 KiB
C#
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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;
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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.CliSecure.vm {
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class UnknownHandlerInfo {
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TypeDefinition type;
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FieldsInfo fieldsInfo;
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MethodDefinition readMethod, executeMethod;
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int numStaticMethods, numInstanceMethods, numVirtualMethods, numCtors;
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int executeMethodThrows;
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public MethodDefinition ReadMethod {
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get { return readMethod; }
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}
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public MethodDefinition ExecuteMethod {
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get { return executeMethod; }
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}
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public int NumStaticMethods {
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get { return numStaticMethods; }
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}
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public int NumInstanceMethods {
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get { return numInstanceMethods; }
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}
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public int NumVirtualMethods {
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get { return numVirtualMethods; }
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}
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public int ExecuteMethodThrows {
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get { return executeMethodThrows; }
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}
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public int NumCtors {
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get { return numCtors; }
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}
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public UnknownHandlerInfo(TypeDefinition type) {
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this.type = type;
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fieldsInfo = new FieldsInfo(type);
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countMethods();
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findOverrideMethods();
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executeMethodThrows = countThrows(executeMethod);
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}
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void countMethods() {
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foreach (var method in type.Methods) {
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if (method.Name == ".cctor") {
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}
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else if (method.Name == ".ctor")
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numCtors++;
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else if (method.IsStatic)
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numStaticMethods++;
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else if (method.IsVirtual)
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numVirtualMethods++;
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else
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numInstanceMethods++;
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}
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}
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void findOverrideMethods() {
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foreach (var method in type.Methods) {
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if (!method.IsVirtual)
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continue;
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if (DotNetUtils.isMethod(method, "System.Void", "(System.IO.BinaryReader)")) {
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if (readMethod != null)
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throw new ApplicationException("Found another read method");
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readMethod = method;
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}
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else if (!DotNetUtils.hasReturnValue(method) && method.Parameters.Count == 1) {
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if (executeMethod != null)
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throw new ApplicationException("Found another execute method");
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executeMethod = method;
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}
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}
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if (readMethod == null)
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throw new ApplicationException("Could not find read method");
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if (executeMethod == null)
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throw new ApplicationException("Could not find execute method");
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}
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static int countThrows(MethodDefinition method) {
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int count = 0;
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foreach (var instr in method.Body.Instructions) {
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if (instr.OpCode.Code == Code.Throw)
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count++;
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}
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return count;
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}
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public bool hasSameFieldTypes(object[] fieldTypes) {
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return new FieldsInfo(fieldTypes).isSame(fieldsInfo);
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}
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}
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}
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