280 lines
9.5 KiB
C#
280 lines
9.5 KiB
C#
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using System;
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using System.Collections.Generic;
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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.Junk;
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internal class Junks
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{
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public static Random random = new Random();
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public static List<MethodDef> AllVoid = new List<MethodDef>();
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public static MethodDefUser MethodGenerator(ModuleDef module, CilBody instr, MethodAttributes attributes)
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{
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MethodImplAttributes implFlags = MethodImplAttributes.IL;
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return new MethodDefUser(Methods.GenerateString(), MethodSig.CreateStatic(module.CorLibTypes.Void), implFlags, attributes)
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{
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Body = instr
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};
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}
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public static MethodDefUser GetStringFunction(ModuleDef module, CilBody cilBody, MethodAttributes attributes)
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{
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MethodImplAttributes implFlags = MethodImplAttributes.IL;
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return new MethodDefUser(Methods.GenerateString(), MethodSig.CreateStatic(module.CorLibTypes.String), implFlags, attributes)
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{
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Body = cilBody
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};
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}
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public static MethodDefUser GetIntFunction(ModuleDef module, CilBody instr, MethodAttributes attributes)
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{
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MethodImplAttributes implFlags = MethodImplAttributes.IL;
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return new MethodDefUser(Methods.GenerateString(), MethodSig.CreateStatic(module.CorLibTypes.Int32), implFlags, attributes)
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{
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Body = instr
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};
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}
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public static MethodDefUser GetLongFunction(ModuleDef module, CilBody instr, MethodAttributes attributes)
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{
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MethodImplAttributes implFlags = MethodImplAttributes.IL;
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return new MethodDefUser(Methods.GenerateString(), MethodSig.CreateStatic(module.CorLibTypes.Int64), implFlags, attributes)
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{
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Body = instr
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};
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}
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public static FieldDef CreateString(ModuleDef module, FieldAttributes attributes)
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{
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FieldSig signature = new FieldSig(module.CorLibTypes.String);
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return new FieldDefUser(Methods.GenerateString(), signature, attributes);
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}
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public static FieldDef CreateInt32(ModuleDef module, FieldAttributes attributes)
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{
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FieldSig signature = new FieldSig(module.CorLibTypes.Int32);
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return new FieldDefUser(Methods.GenerateString(), signature, attributes);
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}
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public static FieldDef CreateInt64(ModuleDef module, FieldAttributes attributes)
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{
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FieldSig signature = new FieldSig(module.CorLibTypes.Int64);
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return new FieldDefUser(Methods.GenerateString(), signature, attributes);
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}
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public static FieldDef CreateBool(ModuleDef module, FieldAttributes attributes)
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{
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FieldSig signature = new FieldSig(module.CorLibTypes.Boolean);
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return new FieldDefUser(Methods.GenerateString(), signature, attributes);
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}
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public static TypeDef CreateNewClass()
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{
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return new TypeDefUser(Methods.GenerateString())
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{
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Attributes = (TypeAttributes.Abstract | TypeAttributes.BeforeFieldInit),
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Namespace = Methods.GenerateString()
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};
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}
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public static MethodDef cctor(ModuleDef module)
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{
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return new MethodDefUser(".cctor", MethodSig.CreateInstance(module.CorLibTypes.Void), MethodImplAttributes.IL, MethodAttributes.Private | MethodAttributes.Static | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);
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}
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public static MethodDef ctor(ModuleDef module)
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{
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return new MethodDefUser(".ctor", MethodSig.CreateInstance(module.CorLibTypes.Void), MethodImplAttributes.IL, MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName);
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}
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public static FieldAttributes RandomFieldAttributes(bool Static)
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{
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FieldAttributes fieldAttributes = FieldAttributes.Private;
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switch (random.Next(0, 3))
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{
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case 0:
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fieldAttributes = FieldAttributes.Public;
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break;
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case 1:
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fieldAttributes = FieldAttributes.Private;
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break;
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case 2:
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fieldAttributes = FieldAttributes.Literal;
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break;
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}
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if (Static)
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{
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fieldAttributes |= FieldAttributes.Static;
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}
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return fieldAttributes;
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}
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public static MethodAttributes RandomMethodAttributes(bool Static)
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{
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MethodAttributes methodAttributes = MethodAttributes.Private;
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switch (random.Next(0, 3))
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{
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case 0:
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methodAttributes = MethodAttributes.Public;
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break;
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case 1:
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methodAttributes = MethodAttributes.Private;
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break;
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case 2:
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methodAttributes = MethodAttributes.Virtual;
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break;
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}
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if (Static)
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{
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methodAttributes |= MethodAttributes.Static;
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}
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return methodAttributes | MethodAttributes.HideBySig | MethodAttributes.PrivateScope;
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}
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public static CilBody GeneratorBody(ModuleDef module, string TypeMethod)
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{
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CilBody cilBody = new CilBody();
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if (TypeMethod == "String")
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{
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Nop));
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cilBody.Variables.Add(new Local(module.CorLibTypes.String, Methods.GenerateString()));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldstr, Methods.GenerateString()));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Stloc_0));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldloc_0));
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}
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if (TypeMethod == "Int32")
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{
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Nop));
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cilBody.Variables.Add(new Local(module.CorLibTypes.Int32, Methods.GenerateString()));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldc_I4, random.Next(int.MinValue, int.MaxValue)));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Stloc_0));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldloc_0));
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}
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if (TypeMethod == "Int64")
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{
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Nop));
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cilBody.Variables.Add(new Local(module.CorLibTypes.Int64, Methods.GenerateString()));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldc_I4, random.Next(int.MinValue, int.MaxValue)));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Stloc_0));
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ldloc_0));
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}
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if (TypeMethod != "Void")
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{
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cilBody.Instructions.Add(Instruction.Create(OpCodes.Ret));
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}
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return cilBody;
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}
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public static void Execute(ModuleDef module)
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{
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int num = random.Next(20, 100);
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for (int i = 0; i < num; i++)
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{
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TypeDef typeDef = CreateNewClass();
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bool flag = false;
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MethodDef methodDef;
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if (random.Next(0, 3) == 1)
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{
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flag = true;
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methodDef = cctor(module);
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}
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else
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{
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methodDef = ctor(module);
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}
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if (random.Next(0, 8) == 1)
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{
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typeDef.Namespace = Methods.GenerateString();
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}
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for (int j = 0; j < 4; j++)
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{
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for (int k = 0; k < random.Next(0, 2); k++)
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{
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typeDef.Fields.Add(CreateInt32(module, RandomFieldAttributes(flag)));
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}
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for (int l = 0; l < random.Next(0, 2); l++)
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{
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typeDef.Methods.Add(GetIntFunction(module, GeneratorBody(module, "Int32"), RandomMethodAttributes(flag)));
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}
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for (int m = 0; m < random.Next(0, 2); m++)
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{
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typeDef.Fields.Add(CreateBool(module, RandomFieldAttributes(flag)));
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}
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for (int n = 0; n < random.Next(0, 2); n++)
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{
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typeDef.Methods.Add(GetStringFunction(module, GeneratorBody(module, "String"), RandomMethodAttributes(flag)));
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}
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for (int num2 = 0; num2 < random.Next(0, 2); num2++)
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{
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typeDef.Fields.Add(CreateString(module, RandomFieldAttributes(flag)));
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}
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for (int num3 = 0; num3 < random.Next(0, 2); num3++)
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{
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typeDef.Fields.Add(CreateInt64(module, RandomFieldAttributes(flag)));
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}
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for (int num4 = 0; num4 < random.Next(0, 2); num4++)
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{
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MethodDef item = MethodGenerator(module, GeneratorBody(module, "Void"), RandomMethodAttributes(flag));
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if (flag)
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{
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AllVoid.Add(item);
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}
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typeDef.Methods.Add(item);
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}
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}
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typeDef.Methods.Add(methodDef);
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methodDef.Body = new CilBody();
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if (!flag)
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{
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MemberRefUser mr = new MemberRefUser(module, ".ctor", MethodSig.CreateInstance(module.CorLibTypes.Void), module.CorLibTypes.Object.TypeDefOrRef);
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methodDef.Body.Instructions.Add(OpCodes.Ldarg_0.ToInstruction());
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methodDef.Body.Instructions.Add(OpCodes.Call.ToInstruction(mr));
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}
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foreach (FieldDef field in typeDef.Fields)
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{
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if (field.FieldType.TypeName == "Int64")
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{
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Ldc_I8, (long)random.Next(int.MinValue, int.MaxValue)));
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Stsfld, field));
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}
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if (field.FieldType.TypeName == "Boolean")
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{
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if (random.Next(0, 2) == 1)
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{
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Ldc_I4_1));
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}
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else
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{
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Ldc_I4_0));
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}
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Stsfld, field));
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}
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if (field.FieldType.TypeName == "String")
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{
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Ldstr, Methods.GenerateString()));
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Stsfld, field));
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}
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if (field.FieldType.TypeName == "Int32")
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{
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Ldc_I4, random.Next(int.MinValue, int.MaxValue)));
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methodDef.Body.Instructions.Add(Instruction.Create(OpCodes.Stsfld, field));
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}
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}
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methodDef.Body.Instructions.Add(OpCodes.Ret.ToInstruction());
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module.Types.Add(typeDef);
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}
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for (int num5 = 0; num5 < random.Next(AllVoid.Count); num5++)
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{
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MethodDef methodDef2 = AllVoid[random.Next(AllVoid.Count)];
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MethodDef method = AllVoid[random.Next(AllVoid.Count)];
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methodDef2.Body.Instructions.Add(Instruction.Create(OpCodes.Call, method));
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methodDef2.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
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}
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AllVoid.Clear();
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}
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}
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