新增InstinctPass,将 ObfuscationInstincts::FullNameOf和NameOf函数转为混淆前的原始类全名和类名

1.x
walon 2025-06-09 22:57:40 +08:00
parent 40f6c90494
commit 260f8b8cc5
6 changed files with 192 additions and 0 deletions

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using dnlib.DotNet;
using dnlib.DotNet.Emit;
using Obfuz.Editor;
using Obfuz.Emit;
using Obfuz.Settings;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Security;
using System.Text;
using UnityEngine.Assertions;
namespace Obfuz.ObfusPasses.Instinct
{
public class InstinctPass : InstructionObfuscationPassBase
{
public override ObfuscationPassType Type => ObfuscationPassType.None;
protected override bool ForceProcessAllAssembliesAndIgnoreAllPolicy => true;
public InstinctPass()
{
}
public override void Start()
{
var ctx = ObfuscationPassContext.Current;
}
public override void Stop()
{
}
protected override bool NeedObfuscateMethod(MethodDef method)
{
return true;
}
private string GetTypeName(TypeSig type)
{
type = type.RemovePinnedAndModifiers();
switch(type.ElementType)
{
case ElementType.Class:
case ElementType.ValueType:
{
return type.ReflectionName;
}
case ElementType.GenericInst:
{
type = ((GenericInstSig)type).GenericType;
return type.ReflectionName;
}
default: return type.ReflectionName;
}
}
private string GetTypeFullName(TypeSig type)
{
type = type.RemovePinnedAndModifiers();
switch (type.ElementType)
{
case ElementType.Class:
case ElementType.ValueType:
{
return type.ReflectionFullName;
}
case ElementType.GenericInst:
{
GenericInstSig genericInstSig = (GenericInstSig)type;
var typeName = new StringBuilder(genericInstSig.GenericType.ReflectionFullName);
typeName.Append("<").Append(string.Join(",", genericInstSig.GenericArguments.Select(GetTypeFullName))).Append(">");
return typeName.ToString();
}
default: return type.ReflectionFullName;
}
}
protected override bool TryObfuscateInstruction(MethodDef callingMethod, Instruction inst, IList<Instruction> instructions, int instructionIndex, List<Instruction> outputInstructions, List<Instruction> totalFinalInstructions)
{
Code code = inst.OpCode.Code;
if (!(inst.Operand is IMethod method) || !method.IsMethod)
{
return false;
}
MethodDef methodDef = method.ResolveMethodDef();
if (methodDef == null || methodDef.DeclaringType.FullName != "Obfuz.ObfuscationInstincts" || methodDef.DeclaringType.DefinitionAssembly.Name != ConstValues.ObfuzRuntimeAssemblyName)
{
return false;
}
string methodName = methodDef.Name;
switch (methodName)
{
case "FullNameOf":
case "NameOf":
{
MethodSpec methodSpec = (MethodSpec)method;
GenericInstMethodSig gims = methodSpec.GenericInstMethodSig;
Assert.AreEqual(1, gims.GenericArguments.Count, "FullNameOf should have exactly one generic argument");
TypeSig type = gims.GenericArguments[0];
switch (methodName)
{
case "FullNameOf":
{
string typeFullName = GetTypeFullName(type);
outputInstructions.Add(Instruction.Create(OpCodes.Ldstr, typeFullName));
break;
}
case "NameOf":
{
string typeName = GetTypeName(type);
outputInstructions.Add(Instruction.Create(OpCodes.Ldstr, typeName));
break;
}
default: throw new NotSupportedException($"Unsupported instinct method: {methodDef.FullName}");
}
break;
}
default: throw new NotSupportedException($"Unsupported instinct method: {methodDef.FullName}");
}
//Debug.Log($"memory encrypt field: {field}");
return true;
}
}
}

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@ -3,6 +3,7 @@ using Obfuz.Data;
using Obfuz.Emit; using Obfuz.Emit;
using Obfuz.EncryptionVM; using Obfuz.EncryptionVM;
using Obfuz.ObfusPasses.CleanUp; using Obfuz.ObfusPasses.CleanUp;
using Obfuz.ObfusPasses.Instinct;
using Obfuz.ObfusPasses.SymbolObfus; using Obfuz.ObfusPasses.SymbolObfus;
using Obfuz.Unity; using Obfuz.Unity;
using Obfuz.Utils; using Obfuz.Utils;
@ -42,6 +43,7 @@ namespace Obfuz
_assemblyResolver = new CombinedAssemblyResolver(new PathAssemblyResolver(_coreSettings.assemblySearchPaths.ToArray()), new UnityProjectManagedAssemblyResolver(_coreSettings.buildTarget)); _assemblyResolver = new CombinedAssemblyResolver(new PathAssemblyResolver(_coreSettings.assemblySearchPaths.ToArray()), new UnityProjectManagedAssemblyResolver(_coreSettings.buildTarget));
_passPolicy = new ConfigurablePassPolicy(_coreSettings.assembliesToObfuscate, _coreSettings.enabledObfuscationPasses, _coreSettings.obfuscationPassRuleConfigFiles); _passPolicy = new ConfigurablePassPolicy(_coreSettings.assembliesToObfuscate, _coreSettings.enabledObfuscationPasses, _coreSettings.obfuscationPassRuleConfigFiles);
_pipeline1.AddPass(new InstinctPass());
foreach (var pass in _coreSettings.obfuscationPasses) foreach (var pass in _coreSettings.obfuscationPasses)
{ {
if (pass is SymbolObfusPass symbolObfusPass) if (pass is SymbolObfusPass symbolObfusPass)

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Obfuz
{
public static class ObfuscationInstincts
{
/// <summary>
/// Returns the original full name before obfuscated of the type T
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static string FullNameOf<T>()
{
return typeof(T).FullName;
}
/// <summary>
/// Returns the original name before obfuscated of the type T
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static string NameOf<T>()
{
return typeof(T).Name;
}
}
}

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