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obfuz
mirror of https://github.com/focus-creative-games/obfuz
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新增 secretKey和globalRandomSeed

backup
walon 2025-05-11 09:17:04 +08:00
parent dafa1ddb32
commit 69e6068dd0
6 changed files with 76 additions and 7 deletions
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11
Editor/Obfuscator.cs
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@ -28,6 +28,8 @@ namespace Obfuz
private readonly List<ModuleDef> _obfuscatedAndNotObfuscatedModules = new List<ModuleDef>();
private readonly Pipeline _pipeline = new Pipeline();
private readonly byte[] _secretKey;
private readonly int _globalRandomSeed;
private ObfuscationPassContext _ctx;
@ -35,8 +37,11 @@ namespace Obfuz
List<string> notObfuscatedAssemblyNamesReferencingObfuscated,
List<string> assemblySearchDirs,
string obfuscatedAssemblyOutputDir,
List<IObfuscationPass> obfuscationPasses)
List<IObfuscationPass> obfuscationPasses, string rawSecretKey, int globalRandomSeed)
{
_secretKey = KeyGenerator.GenerateKey(rawSecretKey);
_globalRandomSeed = globalRandomSeed;
_toObfuscatedAssemblyNames = toObfuscatedAssemblyNames;
_notObfuscatedAssemblyNamesReferencingObfuscated = notObfuscatedAssemblyNamesReferencingObfuscated;
_obfuscatedAssemblyOutputDir = obfuscatedAssemblyOutputDir;
@ -62,8 +67,8 @@ namespace Obfuz
LoadAssemblies();
var random = new RandomWithKey(new byte[] { 0x1, 0x2, 0x3, 0x4 }, 0x5);
var encryptor = new DefaultEncryptor(new byte[] { 0x1A, 0x2B, 0x3C, 0x4D });
var random = new RandomWithKey(_secretKey, _globalRandomSeed);
var encryptor = new DefaultEncryptor(_secretKey);
var rvaDataAllocator = new RvaDataAllocator(random, encryptor);
var constFieldAllocator = new ConstFieldAllocator(encryptor, random, rvaDataAllocator);
_ctx = new ObfuscationPassContext

18
Editor/ObfuscatorBuilder.cs
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@ -13,6 +13,8 @@ namespace Obfuz
{
public class ObfuscatorBuilder
{
private string _secretKey;
private int _globalRandomSeed;
private List<string> _toObfuscatedAssemblyNames = new List<string>();
private List<string> _notObfuscatedAssemblyNamesReferencingObfuscated = new List<string>();
private List<string> _assemblySearchDirs = new List<string>();
@ -20,6 +22,18 @@ namespace Obfuz
private string _obfuscatedAssemblyOutputDir;
private List<IObfuscationPass> _obfuscationPasses = new List<IObfuscationPass>();
public string SecretKey
{
get => _secretKey;
set => _secretKey = value;
}
public int GlobalRandomSeed
{
get => _globalRandomSeed;
set => _globalRandomSeed = value;
}
public List<string> ToObfuscatedAssemblyNames
{
get => _toObfuscatedAssemblyNames;
@ -61,13 +75,15 @@ namespace Obfuz
_notObfuscatedAssemblyNamesReferencingObfuscated,
_assemblySearchDirs,
_obfuscatedAssemblyOutputDir,
_obfuscationPasses);
_obfuscationPasses, _secretKey, _globalRandomSeed);
}
public static ObfuscatorBuilder FromObfuzSettings(ObfuzSettings settings, BuildTarget target)
{
var builder = new ObfuscatorBuilder
{
_secretKey = settings.secretKey,
_globalRandomSeed = settings.globalRandomSeed,
_toObfuscatedAssemblyNames = settings.toObfuscatedAssemblyNames.ToList(),
_notObfuscatedAssemblyNamesReferencingObfuscated = settings.notObfuscatedAssemblyNamesReferencingObfuscated.ToList(),
_assemblySearchDirs = settings.extraAssemblySearchDirs.ToList(),

6
Editor/Settings/ObfuzSettings.cs
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@ -26,6 +26,12 @@ namespace Obfuz.Settings
[Tooltip("enable obfuscation pass")]
public ObfuscationPassType enabledObfuscationPasses = ObfuscationPassType.All;
[Tooltip("secret key")]
public string secretKey = "Code Philosophy";
[Tooltip("global random seed")]
public int globalRandomSeed = 0;
[Tooltip("symbol obfuscation settings")]
public SymbolObfusSettings symbolObfusSettings;

8
Editor/Settings/ObfuzSettingsProvider.cs
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@ -34,6 +34,8 @@ namespace Obfuz.Settings
private SerializedProperty _extraAssemblySearchDirs;
private SerializedProperty _enabledObfuscationPasses;
private SerializedProperty _secretKey;
private SerializedProperty _globalRandomSeed;
private SerializedProperty _symbolObfusSettings;
private SerializedProperty _constEncryptSettings;
@ -64,7 +66,10 @@ namespace Obfuz.Settings
_toObfuscatedAssemblyNames = _serializedObject.FindProperty("toObfuscatedAssemblyNames");
_notObfuscatedAssemblyNamesReferencingObfuscated = _serializedObject.FindProperty("notObfuscatedAssemblyNamesReferencingObfuscated");
_extraAssemblySearchDirs = _serializedObject.FindProperty("extraAssemblySearchDirs");
_enabledObfuscationPasses = _serializedObject.FindProperty("enabledObfuscationPasses");
_secretKey = _serializedObject.FindProperty("secretKey");
_globalRandomSeed = _serializedObject.FindProperty("globalRandomSeed");
_symbolObfusSettings = _serializedObject.FindProperty("symbolObfusSettings");
_constEncryptSettings = _serializedObject.FindProperty("constEncryptSettings");
@ -85,7 +90,10 @@ namespace Obfuz.Settings
EditorGUILayout.PropertyField(_toObfuscatedAssemblyNames);
EditorGUILayout.PropertyField(_notObfuscatedAssemblyNamesReferencingObfuscated);
EditorGUILayout.PropertyField(_extraAssemblySearchDirs);
EditorGUILayout.PropertyField(_enabledObfuscationPasses);
EditorGUILayout.PropertyField(_secretKey);
EditorGUILayout.PropertyField(_globalRandomSeed);
EditorGUILayout.PropertyField(_symbolObfusSettings);
EditorGUILayout.PropertyField(_constEncryptSettings);

35
Editor/Utils/KeyGenerator.cs Normal file
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@ -0,0 +1,35 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
namespace Obfuz.Utils
{
public static class KeyGenerator
{
public const int KeyLength = 1024;
public static byte[] GenerateKey(string initialString)
{
byte[] initialBytes = Encoding.UTF8.GetBytes(initialString);
using var sha512 = SHA512.Create();
byte[] hash = sha512.ComputeHash(initialBytes);
byte[] key = new byte[KeyLength];
int bytesCopied = 0;
while (bytesCopied < key.Length)
{
if (bytesCopied > 0)
{
// 再次哈希之前的哈希值以生成更多数据
hash = sha512.ComputeHash(hash);
}
int bytesToCopy = Math.Min(hash.Length, key.Length - bytesCopied);
Buffer.BlockCopy(hash, 0, key, bytesCopied, bytesToCopy);
bytesCopied += bytesToCopy;
}
return key;
}
}
}

5
Editor/Utils/RandomWithKey.cs
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@ -9,7 +9,6 @@ namespace Obfuz.Utils
{
public class RandomWithKey : IRandom
{
// LCG 参数（使用经典的数值）
private const long a = 1664525;
private const long c = 1013904223;
private const long m = 4294967296; // 2^32
@ -45,7 +44,7 @@ namespace Obfuz.Utils
return (int)((uint)NextInt() % (uint)max);
}
private int GetNextKeyByte()
private int GetNextSalt()
{
if (_nextIndex >= _key.Length)
{
@ -57,7 +56,7 @@ namespace Obfuz.Utils
public int NextInt()
{
_seed = (int)((a * _seed + c) % m);
return _seed ^ GetNextKeyByte();
return _seed ^ GetNextSalt();
}
public long NextLong()