89 lines
3.9 KiB
C#
89 lines
3.9 KiB
C#
using System;
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using dnlib.DotNet;
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using dnlib.DotNet.Emit;
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using Obfuscator.Helper;
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namespace Obfuscator.Obfuscator.Invalid;
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internal class InvalidMD
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{
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public static void Execute(ModuleDef module)
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{
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module.Mvid = null;
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module.Name = Methods.GenerateString();
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module.Import(new FieldDefUser(Methods.GenerateString()));
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foreach (TypeDef type in module.Types)
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{
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TypeDef typeDef = new TypeDefUser(Methods.GenerateString());
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typeDef.Methods.Add(new MethodDefUser());
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typeDef.NestedTypes.Add(new TypeDefUser(Methods.GenerateString()));
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MethodDef item = new MethodDefUser();
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typeDef.Methods.Add(item);
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type.NestedTypes.Add(typeDef);
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type.Events.Add(new EventDefUser());
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foreach (MethodDef method in type.Methods)
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{
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if (method.Body == null)
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{
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continue;
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}
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method.Body.SimplifyBranches();
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if (string.Compare(method.ReturnType.FullName, "System.Void", StringComparison.Ordinal) == 0 && method.HasBody && method.Body.Instructions.Count != 0)
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{
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Local local = new Local(module.Import(typeof(int)).ToTypeSig());
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Local local2 = new Local(module.Import(typeof(bool)).ToTypeSig());
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method.Body.Variables.Add(local);
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method.Body.Variables.Add(local2);
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Instruction operand = method.Body.Instructions[method.Body.Instructions.Count - 1];
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Instruction item2 = new Instruction(OpCodes.Ret);
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Instruction instruction = new Instruction(OpCodes.Ldc_I4_1);
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method.Body.Instructions.Insert(0, new Instruction(OpCodes.Ldc_I4_0));
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method.Body.Instructions.Insert(1, new Instruction(OpCodes.Stloc, local));
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method.Body.Instructions.Insert(2, new Instruction(OpCodes.Br, instruction));
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Instruction instruction2 = new Instruction(OpCodes.Ldloc, local);
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method.Body.Instructions.Insert(3, instruction2);
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method.Body.Instructions.Insert(4, new Instruction(OpCodes.Ldc_I4_0));
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method.Body.Instructions.Insert(5, new Instruction(OpCodes.Ceq));
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method.Body.Instructions.Insert(6, new Instruction(OpCodes.Ldc_I4_1));
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method.Body.Instructions.Insert(7, new Instruction(OpCodes.Ceq));
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method.Body.Instructions.Insert(8, new Instruction(OpCodes.Stloc, local2));
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method.Body.Instructions.Insert(9, new Instruction(OpCodes.Ldloc, local2));
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method.Body.Instructions.Insert(10, new Instruction(OpCodes.Brtrue, method.Body.Instructions[10]));
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method.Body.Instructions.Insert(11, new Instruction(OpCodes.Ret));
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method.Body.Instructions.Insert(12, new Instruction(OpCodes.Calli));
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method.Body.Instructions.Insert(13, new Instruction(OpCodes.Sizeof, operand));
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method.Body.Instructions.Insert(method.Body.Instructions.Count, instruction);
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method.Body.Instructions.Insert(method.Body.Instructions.Count, new Instruction(OpCodes.Stloc, local2));
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method.Body.Instructions.Insert(method.Body.Instructions.Count, new Instruction(OpCodes.Br, instruction2));
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method.Body.Instructions.Insert(method.Body.Instructions.Count, item2);
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ExceptionHandler item3 = new ExceptionHandler(ExceptionHandlerType.Finally)
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{
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HandlerStart = method.Body.Instructions[10],
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HandlerEnd = method.Body.Instructions[11],
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TryEnd = method.Body.Instructions[14],
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TryStart = method.Body.Instructions[12]
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};
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if (!method.Body.HasExceptionHandlers)
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{
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method.Body.ExceptionHandlers.Add(item3);
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}
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method.Body.OptimizeBranches();
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method.Body.OptimizeMacros();
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}
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}
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}
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TypeDef typeDef2 = new TypeDefUser(Methods.GenerateString());
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FieldDef item4 = new FieldDefUser(Methods.GenerateString(), new FieldSig(module.Import(typeof(void)).ToTypeSig()));
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typeDef2.Fields.Add(item4);
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typeDef2.BaseType = module.Import(typeof(void));
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module.Types.Add(typeDef2);
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TypeDef item5 = new TypeDefUser(Methods.GenerateString())
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{
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IsInterface = true,
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IsSealed = true
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};
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module.Types.Add(item5);
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module.TablesHeaderVersion = (ushort)257;
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}
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}
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