50 lines
1.9 KiB
C#
50 lines
1.9 KiB
C#
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using System.IO;
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using System.Linq;
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using HarmonyLib;
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using HybridCLR.Editor;
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using HybridCLR.Editor.Template;
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using Obfuz.Settings;
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using UnityEditor;
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public static class OpCodeShuffleCommand
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{
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private static string TemplatePath => "Assets/Editor/KedrExtension/Templates";
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[InitializeOnLoadMethod]
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private static void Init()
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{
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var harmony = new Harmony("kedr.polymorphic.il");
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harmony.PatchAll();
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}
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public static void GenerateOpCodes()
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{
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var opcodeMapping = Enumerable.Range(0, 248).Select(x => (byte)x).ToArray();
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if (ObfuzSettings.Instance.polymorphicDllSettings.enable && KedrExtensionSettings.Instance.enableOpcodeShuffle)
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{
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var seed = HashUtil.Hash(ObfuzSettings.Instance.polymorphicDllSettings.codeGenerationSecretKey);
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var rng = new System.Random((int)seed);
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RandomUtil.Shuffle(opcodeMapping, rng);
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}
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var reverseOpcodeMapping = new byte[opcodeMapping.Length];
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for (byte i = 0; i < opcodeMapping.Length; i++) reverseOpcodeMapping[opcodeMapping[i]] = i;
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{
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var frr = new FileRegionReplace(File.ReadAllText($"{TemplatePath}/Opcodes.h.tpl"));
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var lines = Opcode.List.Select((op, i) => $"{op.Name} = {opcodeMapping[i]},");
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frr.Replace("OPCODE_VALUE", string.Join('\n', lines));
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var opcodesPath = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/metadata/Opcodes.h";
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frr.Commit(opcodesPath);
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}
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{
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var frr = new FileRegionReplace(File.ReadAllText($"{TemplatePath}/Opcodes.cpp.tpl"));
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var lines = reverseOpcodeMapping.Select(i => Opcode.List[i].Info);
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frr.Replace("OPCODE_INFO", string.Join('\n', lines));
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var opcodesPath = $"{SettingsUtil.LocalIl2CppDir}/libil2cpp/hybridclr/metadata/Opcodes.cpp";
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frr.Commit(opcodesPath);
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}
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}
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}
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