53 lines
2.0 KiB
C#
53 lines
2.0 KiB
C#
using System;
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using dnlib.DotNet;
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using dnlib.DotNet.Emit;
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namespace Obfuscator.Obfuscator.IntProtect;
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internal class Int
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{
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public static void Execute(ModuleDef moduleDef)
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{
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foreach (TypeDef type in moduleDef.GetTypes())
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{
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if (type.IsGlobalModuleType)
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{
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continue;
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}
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foreach (MethodDef method in type.Methods)
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{
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if (!method.HasBody)
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{
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continue;
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}
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for (int i = 0; i < method.Body.Instructions.Count; i++)
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{
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if (method.Body.Instructions[i].IsLdcI4())
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{
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int num = new Random(Guid.NewGuid().GetHashCode()).Next();
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int num2 = new Random(Guid.NewGuid().GetHashCode()).Next();
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int value = num ^ num2;
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Instruction instruction = OpCodes.Nop.ToInstruction();
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Local local = new Local(method.Module.ImportAsTypeSig(typeof(int)));
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method.Body.Variables.Add(local);
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method.Body.Instructions.Insert(i + 1, OpCodes.Stloc.ToInstruction(local));
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method.Body.Instructions.Insert(i + 2, Instruction.Create(OpCodes.Ldc_I4, method.Body.Instructions[i].GetLdcI4Value() - 4));
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method.Body.Instructions.Insert(i + 3, Instruction.Create(OpCodes.Ldc_I4, num));
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method.Body.Instructions.Insert(i + 4, Instruction.Create(OpCodes.Ldc_I4, value));
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method.Body.Instructions.Insert(i + 5, Instruction.Create(OpCodes.Xor));
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method.Body.Instructions.Insert(i + 6, Instruction.Create(OpCodes.Ldc_I4, num2));
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method.Body.Instructions.Insert(i + 7, Instruction.Create(OpCodes.Bne_Un, instruction));
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method.Body.Instructions.Insert(i + 8, Instruction.Create(OpCodes.Ldc_I4, 2));
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method.Body.Instructions.Insert(i + 9, OpCodes.Stloc.ToInstruction(local));
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method.Body.Instructions.Insert(i + 10, Instruction.Create(OpCodes.Sizeof, method.Module.Import(typeof(float))));
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method.Body.Instructions.Insert(i + 11, Instruction.Create(OpCodes.Add));
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method.Body.Instructions.Insert(i + 12, instruction);
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i += 12;
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}
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}
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method.Body.SimplifyBranches();
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}
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}
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}
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}
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