├── .gitignore ├── AsertInject ├── AsertInject.csproj ├── AsertSigning.cs ├── O.cs ├── Properties │ └── AssemblyInfo.cs └── UnityCertificate.cs ├── AsertNet.sln ├── AsertNet ├── Arguments.cs ├── AsertNet.csproj ├── Program.cs ├── Properties │ └── AssemblyInfo.cs ├── Protection │ ├── AntiTamper │ │ └── AntiTampering.cs │ ├── Asert.cs │ ├── Constants │ │ └── ConstantProtection.cs │ ├── Extensions.cs │ ├── Renaming │ │ └── Renamer.cs │ └── Utils.cs ├── Signing │ ├── AssemblyInfo.cs │ └── Signer.cs └── packages.config ├── LICENSE ├── Libs ├── dnlib.dll ├── dnlib.pdb ├── dnlib.xml ├── log4net.dll └── log4net.pdb └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | # Autosave files 2 | *~ 3 | 4 | # build 5 | [Oo]bj/ 6 | [Bb]in/ 7 | packages/ 8 | TestResults/ 9 | 10 | # globs 11 | Makefile.in 12 | *.DS_Store 13 | *.sln.cache 14 | *.suo 15 | *.cache 16 | *.pidb 17 | *.userprefs 18 | *.usertasks 19 | config.log 20 | config.make 21 | config.status 22 | aclocal.m4 23 | install-sh 24 | autom4te.cache/ 25 | *.user 26 | *.tar.gz 27 | tarballs/ 28 | test-results/ 29 | Thumbs.db 30 | 31 | # Mac bundle stuff 32 | *.dmg 33 | *.app 34 | 35 | # resharper 36 | *_Resharper.* 37 | *.Resharper 38 | 39 | # dotCover 40 | *.dotCover 41 | -------------------------------------------------------------------------------- /AsertInject/AsertInject.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Debug 5 | AnyCPU 6 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D} 7 | Library 8 | AsertInject 9 | AsertInject 10 | v3.5 11 | 12 | 13 | true 14 | full 15 | false 16 | bin\Debug 17 | DEBUG; 18 | prompt 19 | 4 20 | false 21 | 22 | 23 | true 24 | bin\Release 25 | prompt 26 | 4 27 | false 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | -------------------------------------------------------------------------------- /AsertInject/AsertSigning.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using System.Reflection; 4 | using System.Security.Cryptography; 5 | using System.Security.Policy; 6 | 7 | public static class AsertSigning 8 | { 9 | public static void Expose() 10 | { 11 | var hash = GetHash(); 12 | var t = GetClass(); 13 | var methodInfo = GetMethod(t); 14 | string h__ = methodInfo.Invoke(null, null).ToString(); 15 | if (h__ != hash) 16 | throw new Exception(); 17 | } 18 | 19 | public static string GetHash() 20 | { 21 | var a = System.Reflection.Assembly.GetExecutingAssembly(); 22 | return BitConverter.ToString(a.GetName().GetPublicKeyToken()).Replace("-", string.Empty); 23 | } 24 | 25 | public static Type GetClass() 26 | { 27 | return Type.GetType("UnityEngine.UnityCertificate, UnityEngine.CoreModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"); 28 | } 29 | 30 | public static MethodInfo GetMethod(Type t) 31 | { 32 | return t.GetMethod("GetHash", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public); 33 | } 34 | 35 | } 36 | -------------------------------------------------------------------------------- /AsertInject/O.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Text; 4 | 5 | public static class O 6 | { 7 | public static int _(int i) 8 | { 9 | return i ^ 0; 10 | } 11 | 12 | public static string _e(string t, byte kk) 13 | { 14 | byte[] k = new byte[256]; 15 | int ll = k.Length; 16 | for (int j = 0; j < ll; j++) 17 | if (j == 0) 18 | k[j] ^= 127; 19 | else 20 | k[j] ^= kk; 21 | int i = 0; 22 | int l = k.Length; 23 | byte[] octets = Encoding.UTF8 24 | .GetBytes(t) 25 | .Select(b => (byte)(b ^ k[(++i) % l])) 26 | .ToArray(); 27 | return Convert.ToBase64String(octets); 28 | } 29 | 30 | public static string _d(string t) 31 | { 32 | byte kk = 196; 33 | byte[] k = new byte[256]; 34 | int ll = k.Length; 35 | for (int j = 0; j < ll; j++) 36 | if (j == 0) 37 | k[j] ^= 127; 38 | else 39 | k[j] ^= kk; 40 | int l = k.Length; 41 | int i = 0; 42 | byte[] octets = Convert 43 | .FromBase64String(t) 44 | .Select(b => (byte)(b ^ k[(++i) % l])) 45 | .ToArray(); 46 | string plainText = Encoding.UTF8.GetString(octets); 47 | return plainText; 48 | } 49 | 50 | 51 | 52 | 53 | } -------------------------------------------------------------------------------- /AsertInject/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | 4 | // Information about this assembly is defined by the following attributes. 5 | // Change them to the values specific to your project. 6 | 7 | [assembly: AssemblyTitle("AsertInject")] 8 | [assembly: AssemblyDescription("")] 9 | [assembly: AssemblyConfiguration("")] 10 | [assembly: AssemblyCompany("")] 11 | [assembly: AssemblyProduct("")] 12 | [assembly: AssemblyCopyright("${AuthorCopyright}")] 13 | [assembly: AssemblyTrademark("")] 14 | [assembly: AssemblyCulture("")] 15 | 16 | // The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}". 17 | // The form "{Major}.{Minor}.*" will automatically update the build and revision, 18 | // and "{Major}.{Minor}.{Build}.*" will update just the revision. 19 | 20 | [assembly: AssemblyVersion("1.0.*")] 21 | 22 | // The following attributes are used to specify the signing key for the assembly, 23 | // if desired. See the Mono documentation for more information about signing. 24 | 25 | //[assembly: AssemblyDelaySign(false)] 26 | //[assembly: AssemblyKeyFile("")] 27 | -------------------------------------------------------------------------------- /AsertInject/UnityCertificate.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace UnityEngine 4 | { 5 | public static class UnityCertificate 6 | { 7 | public static string GetHash() 8 | { 9 | return ""; 10 | } 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /AsertNet.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 2012 4 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AsertNet", "AsertNet\AsertNet.csproj", "{62ECFF04-3D8E-4A87-A0BF-46904A4936D0}" 5 | EndProject 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AsertInject", "AsertInject\AsertInject.csproj", "{B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|x86 = Debug|x86 11 | Release|x86 = Release|x86 12 | EndGlobalSection 13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 14 | {62ECFF04-3D8E-4A87-A0BF-46904A4936D0}.Debug|x86.ActiveCfg = Debug|x86 15 | {62ECFF04-3D8E-4A87-A0BF-46904A4936D0}.Debug|x86.Build.0 = Debug|x86 16 | {62ECFF04-3D8E-4A87-A0BF-46904A4936D0}.Release|x86.ActiveCfg = Release|x86 17 | {62ECFF04-3D8E-4A87-A0BF-46904A4936D0}.Release|x86.Build.0 = Release|x86 18 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D}.Debug|x86.ActiveCfg = Debug|Any CPU 19 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D}.Debug|x86.Build.0 = Debug|Any CPU 20 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D}.Release|x86.ActiveCfg = Release|Any CPU 21 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D}.Release|x86.Build.0 = Release|Any CPU 22 | EndGlobalSection 23 | EndGlobal 24 | -------------------------------------------------------------------------------- /AsertNet/Arguments.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Text.RegularExpressions; 3 | using System.Collections.Generic; 4 | 5 | namespace AsertNet 6 | { 7 | /// 8 | /// Arguments class 9 | /// 10 | public class Arguments 11 | { 12 | // Variables 13 | private Dictionary Parameters; 14 | 15 | // Constructor 16 | public Arguments(string[] Args) 17 | { 18 | Parameters = new Dictionary(); 19 | Regex Spliter = new Regex(@"^-{1,2}|^/|=|:", RegexOptions.IgnoreCase | RegexOptions.Compiled); 20 | Regex Remover = new Regex(@"^['""]?(.*?)['""]?$", RegexOptions.IgnoreCase | RegexOptions.Compiled); 21 | string Parameter = null; 22 | string[] Parts; 23 | 24 | // Valid parameters forms: 25 | // {-,/,--}param{ ,=,:}((",')value(",')) 26 | // Examples: -param1 value1 --param2 /param3:"Test-:-work" /param4=happy -param5 '--=nice=--' 27 | foreach (string Txt in Args) 28 | { 29 | // Look for new parameters (-,/ or --) and a possible enclosed value (=,:) 30 | Parts = Spliter.Split(Txt, 3); 31 | switch (Parts.Length) 32 | { 33 | // Found a value (for the last parameter found (space separator)) 34 | case 1: 35 | if (Parameter != null) 36 | { 37 | if (!Parameters.ContainsKey(Parameter)) 38 | { 39 | Parts[0] = Remover.Replace(Parts[0], "$1"); 40 | Parameters.Add(Parameter, Parts[0]); 41 | } 42 | Parameter = null; 43 | } 44 | // else Error: no parameter waiting for a value (skipped) 45 | break; 46 | // Found just a parameter 47 | case 2: 48 | // The last parameter is still waiting. With no value, set it to true. 49 | if (Parameter != null) 50 | { 51 | if (!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter, "true"); 52 | } 53 | Parameter = Parts[1]; 54 | break; 55 | // Parameter with enclosed value 56 | case 3: 57 | // The last parameter is still waiting. With no value, set it to true. 58 | if (Parameter != null) 59 | { 60 | if (!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter, "true"); 61 | } 62 | Parameter = Parts[1]; 63 | // Remove possible enclosing characters (",') 64 | if (!Parameters.ContainsKey(Parameter)) 65 | { 66 | Parts[2] = Remover.Replace(Parts[2], "$1"); 67 | Parameters.Add(Parameter, Parts[2]); 68 | } 69 | Parameter = null; 70 | break; 71 | } 72 | } 73 | // In case a parameter is still waiting 74 | if (Parameter != null) 75 | { 76 | if (!Parameters.ContainsKey(Parameter)) Parameters.Add(Parameter, "true"); 77 | } 78 | } 79 | 80 | public bool ContainsArg(string key) 81 | { 82 | return Parameters.ContainsKey(key); 83 | } 84 | 85 | // Retrieve a parameter value if it exists 86 | public string this[string Param] 87 | { 88 | get 89 | { 90 | return (Parameters[Param]); 91 | } 92 | } 93 | } 94 | } 95 | -------------------------------------------------------------------------------- /AsertNet/AsertNet.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Debug 5 | x86 6 | {62ECFF04-3D8E-4A87-A0BF-46904A4936D0} 7 | Exe 8 | AsertNet 9 | AsertNet 10 | v3.5 11 | 12 | 13 | true 14 | full 15 | false 16 | bin\Debug 17 | DEBUG; 18 | prompt 19 | 4 20 | true 21 | x86 22 | 23 | 24 | true 25 | bin\Release 26 | prompt 27 | 4 28 | true 29 | x86 30 | 31 | 32 | 33 | 34 | ..\LIbs\log4net.dll 35 | 36 | 37 | 38 | ..\packages\Mono.Cecil.0.9.6.4\lib\net35\Mono.Cecil.dll 39 | 40 | 41 | ..\packages\Mono.Cecil.0.9.6.4\lib\net35\Mono.Cecil.Mdb.dll 42 | 43 | 44 | ..\packages\Mono.Cecil.0.9.6.4\lib\net35\Mono.Cecil.Pdb.dll 45 | 46 | 47 | ..\packages\Mono.Cecil.0.9.6.4\lib\net35\Mono.Cecil.Rocks.dll 48 | 49 | 50 | ..\Libs\dnlib.dll 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | {B0CCFCF4-F67A-4717-A6D8-AF4B5E244E4D} 69 | AsertInject 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | -------------------------------------------------------------------------------- /AsertNet/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using AsertNet.Protection; 4 | using log4net; 5 | using log4net.Config; 6 | 7 | namespace AsertNet 8 | { 9 | class MainClass 10 | { 11 | internal static readonly ILog log = LogManager.GetLogger(typeof(MainClass)); 12 | public static void Main(string[] args) 13 | { 14 | System.Reflection.Assembly assembly = System.Reflection.Assembly.GetEntryAssembly(); 15 | string ApplicationPath = System.IO.Path.GetDirectoryName(assembly.Location); 16 | XmlConfigurator.Configure(new FileInfo(Path.Combine(ApplicationPath, "logging.xml"))); 17 | 18 | log.Info("Asert Unity Build Protection"); 19 | log.Info("Copyright (c) 2017 - Alexander Melkozerov"); 20 | log.Info("-------------------------------------------------"); 21 | 22 | Arguments parsedArgs = new Arguments(args); 23 | 24 | if (!parsedArgs.ContainsArg("filename")) 25 | { 26 | PrintUsage(); 27 | return; 28 | } 29 | string filename = parsedArgs["filename"]; 30 | 31 | 32 | if (parsedArgs.ContainsArg("antitamper") && !parsedArgs.ContainsArg("unitylib")) 33 | { 34 | log.Error("You're going to use anti tampering protection, but forgot to specify location of the unityengine.dll with --unitylib argument"); 35 | return; 36 | } 37 | 38 | Asert asert = new Asert(filename) 39 | { 40 | StrongRenaming = !parsedArgs.ContainsArg("softrenaming"), 41 | RenameEvents = parsedArgs.ContainsArg("renameevents") || parsedArgs.ContainsArg("renameall"), 42 | RenameProps = parsedArgs.ContainsArg("renameprops") || parsedArgs.ContainsArg("renameall"), 43 | RenameFields = parsedArgs.ContainsArg("renamefields") || parsedArgs.ContainsArg("renameall"), 44 | RenameTypes = parsedArgs.ContainsArg("renametypes") || parsedArgs.ContainsArg("renameall"), 45 | RenameMethodParams = parsedArgs.ContainsArg("renamemethodparams") || parsedArgs.ContainsArg("renameall"), 46 | RenameMethods = parsedArgs.ContainsArg("renamemethods") || parsedArgs.ContainsArg("renameall"), 47 | 48 | HideStrings = parsedArgs.ContainsArg("hidestrings"), 49 | HideIntegers = parsedArgs.ContainsArg("hideintegers"), 50 | EncryptStrings = parsedArgs.ContainsArg("encryptstrings"), 51 | 52 | }; 53 | 54 | if (parsedArgs.ContainsArg("antitamper")) 55 | asert.AntiTamperingProtect(); 56 | asert.ProtectConstants(); 57 | asert.PerformRenaming(); 58 | asert.Save(filename); 59 | if (parsedArgs.ContainsArg("antitamper")) 60 | { 61 | asert.AntiTamperingInjectUnity(asert.AntiTamperingSign(filename), parsedArgs["unitylib"]); 62 | } 63 | } 64 | 65 | static void PrintUsage() 66 | { 67 | log.Info("Usage: AsertNet.exe --filename=\"\""); 68 | log.Info("Additional parameters:"); 69 | log.Info("--renameall - Perform renaming all things"); 70 | log.Info("--renamemethods - Perform renaming methods"); 71 | log.Info("--renamemethodparams - Perform renaming method parameters"); 72 | log.Info("--renametypes - Perform renaming types"); 73 | log.Info("--renamefields - Perform renaming fields"); 74 | log.Info("--renameprops - Perform renaming props"); 75 | log.Info("--renameevents - Perform renaming events"); 76 | log.Info("--softrenaming - Renaming to hex symbols instead of unreadable UTF-8"); 77 | log.Info(""); 78 | log.Info("--hideintegers - Replacing every integer constant with masked value"); 79 | log.Info("--hidestrings - Move all the string to the special module"); 80 | log.Info("--encryptstrings - Xor all the string (if used will auto enable --hidestrings)"); 81 | log.Info(""); 82 | log.Info("--antitamper - Inject checksum verification"); 83 | log.Info("--unitylib - Location of UnityEngine.dll (required for anti tampering)"); 84 | } 85 | 86 | } 87 | } -------------------------------------------------------------------------------- /AsertNet/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | 4 | // Information about this assembly is defined by the following attributes. 5 | // Change them to the values specific to your project. 6 | 7 | [assembly: AssemblyTitle("AsertNet")] 8 | [assembly: AssemblyDescription("")] 9 | [assembly: AssemblyConfiguration("")] 10 | [assembly: AssemblyCompany("")] 11 | [assembly: AssemblyProduct("")] 12 | [assembly: AssemblyCopyright("${AuthorCopyright}")] 13 | [assembly: AssemblyTrademark("")] 14 | [assembly: AssemblyCulture("")] 15 | 16 | // The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}". 17 | // The form "{Major}.{Minor}.*" will automatically update the build and revision, 18 | // and "{Major}.{Minor}.{Build}.*" will update just the revision. 19 | 20 | [assembly: AssemblyVersion("1.0.*")] 21 | 22 | // The following attributes are used to specify the signing key for the assembly, 23 | // if desired. See the Mono documentation for more information about signing. 24 | 25 | //[assembly: AssemblyDelaySign(false)] 26 | //[assembly: AssemblyKeyFile("")] 27 | -------------------------------------------------------------------------------- /AsertNet/Protection/AntiTamper/AntiTampering.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using System.Security.Policy; 4 | using dnlib.DotNet; 5 | using dnlib.DotNet.Emit; 6 | using log4net; 7 | using UnityEngine; 8 | 9 | namespace AsertNet.Protection.AntiTamper 10 | { 11 | public class AntiTampering 12 | { 13 | internal static readonly ILog log = LogManager.GetLogger(typeof(AntiTampering)); 14 | 15 | 16 | public static string Sign(string resultAssemblyFilename) 17 | { 18 | log.Info("Signing module..."); 19 | var aInfo = Signing.Signer.SignAssembly(resultAssemblyFilename); 20 | log.Info("Module signed with token " + aInfo.HexToken); 21 | return aInfo.HexToken; 22 | } 23 | 24 | 25 | public static void AddCallToUnity(ModuleDefMD unityModule, string hash) 26 | { 27 | log.Info("Adding hash to Unity..."); 28 | 29 | System.Reflection.Assembly assembly = System.Reflection.Assembly.GetEntryAssembly(); 30 | string applicationPath = System.IO.Path.GetDirectoryName(assembly.Location); 31 | ModuleDefMD typeModule = ModuleDefMD.Load(System.IO.Path.Combine(applicationPath, "AsertInject.dll")); 32 | TypeDef tamperClass = typeModule.ResolveTypeDef(MDToken.ToRID(typeof(UnityCertificate).MetadataToken)); 33 | MethodDef checkerMethod = tamperClass.FindMethod("GetHash"); 34 | 35 | typeModule.Types.Remove(tamperClass); 36 | unityModule.Types.Add(tamperClass); 37 | 38 | checkerMethod.Body.Instructions[1].Operand = hash; 39 | 40 | //foreach (var i in checkerMethod.Body.Instructions) 41 | // Console.WriteLine(i); 42 | } 43 | 44 | public static void AddCallToModule(ModuleDefMD module) 45 | { 46 | log.Info("Adding hash checking to the assembly..."); 47 | System.Reflection.Assembly assembly = System.Reflection.Assembly.GetEntryAssembly(); 48 | string applicationPath = System.IO.Path.GetDirectoryName(assembly.Location); 49 | ModuleDefMD typeModule = ModuleDefMD.Load(System.IO.Path.Combine(applicationPath, "AsertInject.dll")); 50 | TypeDef tamperClass = typeModule.ResolveTypeDef(MDToken.ToRID(typeof(AsertSigning).MetadataToken)); 51 | 52 | typeModule.Types.Remove(tamperClass); 53 | module.Types.Add(tamperClass); 54 | 55 | MethodDef cctor = module.GlobalType.FindOrCreateStaticConstructor(); 56 | 57 | //foreach (var p in cctor.Body.Instructions) 58 | //Console.WriteLine(p); 59 | 60 | cctor.Body.Instructions.Insert(0, Instruction.Create(OpCodes.Call, tamperClass.FindMethod("Expose"))); 61 | 62 | 63 | //var t = Type.GetType("UnityEngine.UnityCertificate, UnityEngine.CoreModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"); 64 | //Console.WriteLine(t); 65 | //Console.WriteLine(t.GetMethod("GetHash", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public)); 66 | //var methodInfo = t.GetMethod("GetHash", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public); 67 | //string h__ = methodInfo.Invoke(null, null).ToString(); 68 | 69 | //throw new Exception("asd"); 70 | 71 | 72 | 73 | 74 | //foreach (TypeDef type in module.Types) 75 | //{ 76 | // if (type.IsGlobalModuleType) 77 | // continue; 78 | 79 | // foreach (MethodDef method in type.Methods) 80 | // { 81 | // if (!method.HasBody) 82 | // continue; 83 | // if (method.IsConstructor) 84 | // { 85 | // method.Body.Instructions.Insert(0, Instruction.Create(OpCodes.Nop)); 86 | // method.Body.Instructions.Insert(0, Instruction.Create(OpCodes.Call, init)); 87 | // } 88 | // } 89 | //} 90 | } 91 | } 92 | } 93 | -------------------------------------------------------------------------------- /AsertNet/Protection/Asert.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using AsertNet.Protection.AntiTamper; 4 | using AsertNet.Protection.Constants; 5 | using AsertNet.Protection.Renaming; 6 | using dnlib.DotNet; 7 | using log4net; 8 | 9 | 10 | namespace AsertNet.Protection 11 | { 12 | public class Asert 13 | { 14 | public bool StrongRenaming { get; set; } 15 | public bool RenameTypes { get; set; } 16 | public bool RenameMethods { get; set; } 17 | public bool RenameMethodParams { get; set; } 18 | public bool RenameFields { get; set; } 19 | public bool RenameProps { get; set; } 20 | public bool RenameEvents { get; set; } 21 | 22 | public bool HideIntegers { get; set; } 23 | public bool HideStrings { get; set; } 24 | public bool EncryptStrings { get; set; } 25 | 26 | internal static readonly ILog log = LogManager.GetLogger(typeof(Asert)); 27 | ModuleDefMD module; 28 | 29 | public Asert(string filename) 30 | { 31 | log.Info("Reading file " + filename); 32 | module = ModuleDefMD.Load(filename); 33 | } 34 | 35 | public void PerformRenaming() 36 | { 37 | Renamer r = new Renamer(module) 38 | { 39 | RenameTypes = this.RenameTypes, 40 | RenameMethods = this.RenameMethods, 41 | RenameMethodParams = this.RenameMethodParams, 42 | RenameFields = this.RenameFields, 43 | RenameProps = this.RenameProps, 44 | RenameEvents = this.RenameEvents, 45 | StrongRenaming = this.StrongRenaming, 46 | }; 47 | r.RenameModule(); 48 | } 49 | 50 | public void ProtectConstants() 51 | { 52 | ConstantProtection cp = new ConstantProtection(module) 53 | { 54 | HideStrings = this.HideStrings, 55 | HideIntegers = this.HideIntegers, 56 | EncryptStrings = this.EncryptStrings, 57 | }; 58 | cp.Protect(); 59 | } 60 | 61 | public void AntiTamperingProtect() 62 | { 63 | AntiTampering.AddCallToModule(module); 64 | } 65 | 66 | public string AntiTamperingSign(string resultAssembly) 67 | { 68 | return AntiTampering.Sign(resultAssembly); 69 | } 70 | 71 | public void AntiTamperingInjectUnity(string hash, string unityLibFilename) 72 | { 73 | log.Info("Reading file " + unityLibFilename); 74 | var unityModule = ModuleDefMD.Load(unityLibFilename); 75 | AntiTampering.AddCallToUnity(unityModule, hash); 76 | unityModule.Write(unityLibFilename); 77 | log.Info("Unity lib updated"); 78 | } 79 | 80 | public void Save(string filename) 81 | { 82 | module.Write(filename); 83 | log.Info("File Saved to " + filename); 84 | } 85 | 86 | } 87 | } 88 | -------------------------------------------------------------------------------- /AsertNet/Protection/Constants/ConstantProtection.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Text; 4 | using dnlib.DotNet; 5 | using dnlib.DotNet.Emit; 6 | using log4net; 7 | 8 | namespace AsertNet.Protection.Constants 9 | { 10 | public class ConstantProtection 11 | { 12 | public bool HideIntegers { get; set; } 13 | public bool HideStrings { get; set; } 14 | public bool EncryptStrings { get; set; } 15 | 16 | internal static readonly ILog log = LogManager.GetLogger(typeof(ConstantProtection)); 17 | 18 | ModuleDefMD module; 19 | MethodDef intMaskMethod; 20 | MethodDef strMaskMethod; 21 | int intKey; 22 | byte strKey; 23 | Random rnd; 24 | List usedNames; 25 | 26 | public ConstantProtection(ModuleDefMD module) 27 | { 28 | this.usedNames = new List(); 29 | this.module = module; 30 | this.rnd = new Random(); 31 | } 32 | 33 | void InjectMasker() 34 | { 35 | System.Reflection.Assembly assembly = System.Reflection.Assembly.GetEntryAssembly(); 36 | string applicationPath = System.IO.Path.GetDirectoryName(assembly.Location); 37 | ModuleDefMD typeModule = ModuleDefMD.Load(System.IO.Path.Combine(applicationPath, "AsertInject.dll")); 38 | TypeDef maskClass = typeModule.ResolveTypeDef(MDToken.ToRID(typeof(O).MetadataToken)); 39 | typeModule.Types.Remove(maskClass); 40 | module.Types.Add(maskClass); 41 | 42 | intMaskMethod = maskClass.FindMethod("_"); 43 | intKey = rnd.Next(); 44 | intMaskMethod.Body.Instructions[2].OpCode = OpCodes.Ldc_I4; 45 | intMaskMethod.Body.Instructions[2].Operand = intKey; 46 | 47 | strMaskMethod = maskClass.FindMethod("_d"); 48 | strKey = (byte)rnd.Next(2, 255); 49 | strMaskMethod.Body.Instructions[3].OpCode = OpCodes.Ldc_I4; 50 | strMaskMethod.Body.Instructions[3].Operand = (int)strKey; 51 | 52 | //var mm = maskClass.FindMethod("_d"); 53 | //Console.WriteLine(mm); 54 | //Console.WriteLine(mm.HasBody); 55 | //foreach (var i in mm.Body.Instructions) 56 | // Console.WriteLine(i); 57 | //throw new Exception("Stop"); 58 | 59 | log.InfoFormat("Keys generated. Str: {0}, Int: {1}", strKey, intKey); 60 | } 61 | 62 | public void Protect() 63 | { 64 | log.Info("Injecting masking class..."); 65 | InjectMasker(); 66 | log.Info("Protecting modules..."); 67 | foreach (TypeDef type in module.Types) 68 | { 69 | ProtectType(type); 70 | } 71 | } 72 | 73 | void ProtectType(TypeDef type) 74 | { 75 | foreach (MethodDef method in type.Methods) 76 | { 77 | ProcessMethod(method); 78 | } 79 | 80 | if (type.HasNestedTypes) 81 | foreach (TypeDef nested in type.NestedTypes) 82 | ProtectType(nested); 83 | } 84 | 85 | bool CanProtect(MethodDef method) 86 | { 87 | if (method == intMaskMethod) 88 | return false; 89 | if (!method.HasBody) 90 | return false; 91 | if (method.DeclaringType.IsGlobalModuleType) 92 | return false; 93 | return true; 94 | } 95 | 96 | void ProcessMethod(MethodDef method) 97 | { 98 | if (!CanProtect(method)) 99 | return; 100 | log.DebugFormat("Protecting constants in method {0}.{1}()", method.DeclaringType.FullName, method.Name); 101 | 102 | if (HideIntegers) 103 | { 104 | var instr = method.Body.Instructions; 105 | for (int i = 0; i < instr.Count; i++) 106 | { 107 | if (instr[i].IsLdcI4()) 108 | { 109 | ProtectIntegers(method, i); 110 | i += 10; 111 | } 112 | } 113 | } 114 | 115 | if (HideStrings || EncryptStrings) 116 | StringHidding(method); 117 | } 118 | 119 | void ProtectIntegers(MethodDef method, int i) 120 | { 121 | var instr = method.Body.Instructions; 122 | if (!instr[i].IsLdcI4()) 123 | return; 124 | 125 | int value = instr[i].GetLdcI4Value(); 126 | method.Body.Instructions.Insert(i + 1, Instruction.Create(OpCodes.Call, intMaskMethod)); 127 | method.Body.Instructions[i].OpCode = OpCodes.Ldc_I4; 128 | method.Body.Instructions[i].Operand = value ^ intKey; 129 | } 130 | 131 | string MaskString(string s) 132 | { 133 | if (!EncryptStrings) 134 | return s; 135 | return O._e(s, strKey); 136 | } 137 | 138 | void StringHidding(MethodDef method) 139 | { 140 | var instr = method.Body.Instructions; 141 | 142 | for (int i = 0; i < instr.Count; i++) 143 | { 144 | if (instr[i].OpCode == OpCodes.Ldstr) 145 | { 146 | var original_str_value = instr[i].Operand.ToString(); 147 | var modulector = method.Module.GlobalType; 148 | 149 | FieldDefUser original_str_value_field = new FieldDefUser(GenerateNewName(), 150 | new FieldSig(method.Module.CorLibTypes.String), 151 | FieldAttributes.Public | FieldAttributes.Static); 152 | modulector.Fields.Add(original_str_value_field); 153 | 154 | var cctor = modulector.FindOrCreateStaticConstructor(); 155 | 156 | //cctor.Body.Instructions.Insert(cctor.Body.Instructions.Count - 1, 157 | // OpCodes.Ldstr.ToInstruction(MaskString(original_str_value))); 158 | 159 | //cctor.Body.Instructions.Insert(cctor.Body.Instructions.Count - 1, 160 | //OpCodes.Stsfld.ToInstruction(original_str_value_field)); 161 | 162 | cctor.Body.Instructions.Insert(0, 163 | OpCodes.Stsfld.ToInstruction(original_str_value_field)); 164 | cctor.Body.Instructions.Insert(0, 165 | OpCodes.Ldstr.ToInstruction(MaskString(original_str_value))); 166 | 167 | 168 | instr[i].OpCode = OpCodes.Ldsfld; 169 | instr[i].Operand = original_str_value_field; 170 | 171 | if (EncryptStrings) 172 | instr.Insert(i + 1, Instruction.Create(OpCodes.Call, strMaskMethod)); 173 | 174 | } 175 | } 176 | } 177 | 178 | public string GenerateNewName() 179 | { 180 | string str = Utils.RandomStringHex(rnd, 16); 181 | while (usedNames.Contains(str)) 182 | { 183 | str = Utils.RandomStringHex(rnd, 16); 184 | } 185 | usedNames.Add(str); 186 | return str; 187 | } 188 | 189 | } 190 | } 191 | -------------------------------------------------------------------------------- /AsertNet/Protection/Extensions.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using dnlib.DotNet; 4 | 5 | namespace AsertNet.Protection 6 | { 7 | public static class Extensions 8 | { 9 | /// 10 | /// Determines whether the object has the specified custom attribute. 11 | /// 12 | /// The object. 13 | /// The full name of the type of custom attribute. 14 | /// true if the specified object has custom attribute; otherwise, false. 15 | public static bool HasAttribute(this IHasCustomAttribute obj, string fullName) 16 | { 17 | return obj.CustomAttributes.Any(attr => attr.TypeFullName == fullName); 18 | } 19 | 20 | /// 21 | /// Determines whether the specified type is inherited from a base type. 22 | /// 23 | /// The type. 24 | /// The full name of base type. 25 | /// true if the specified type is inherited from a base type; otherwise, false. 26 | public static bool InheritsFrom(this TypeDef type, string baseType) 27 | { 28 | if (type.BaseType == null) 29 | return false; 30 | 31 | TypeDef bas = type; 32 | do 33 | { 34 | try 35 | { 36 | bas = bas.BaseType.ResolveTypeDefThrow(); 37 | if (bas.ReflectionFullName == baseType) 38 | return true; 39 | } 40 | catch (TypeResolveException) 41 | { 42 | return false; 43 | } 44 | 45 | } while (bas.BaseType != null); 46 | return false; 47 | } 48 | 49 | 50 | /// 51 | /// Determines whether the specified type implements the specified interface. 52 | /// 53 | /// The type. 54 | /// The full name of the type of interface. 55 | /// true if the specified type implements the interface; otherwise, false. 56 | public static bool Implements(this TypeDef type, string fullName) 57 | { 58 | do 59 | { 60 | foreach (InterfaceImpl iface in type.Interfaces) 61 | { 62 | if (iface.Interface.ReflectionFullName == fullName) 63 | return true; 64 | } 65 | 66 | if (type.BaseType == null) 67 | return false; 68 | try 69 | { 70 | type = type.BaseType.ResolveTypeDefThrow(); 71 | } 72 | catch (TypeResolveException) 73 | { 74 | return false; 75 | } 76 | } while (type != null); 77 | throw new Exception("Should not be reached."); 78 | } 79 | } 80 | } 81 | -------------------------------------------------------------------------------- /AsertNet/Protection/Renaming/Renamer.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using System.Text; 5 | using dnlib.DotNet; 6 | using log4net; 7 | 8 | namespace AsertNet.Protection.Renaming 9 | { 10 | public class Renamer 11 | { 12 | public bool StrongRenaming { get; set; } 13 | public bool RenameTypes { get; set; } 14 | public bool RenameMethods { get; set; } 15 | public bool RenameMethodParams { get; set; } 16 | public bool RenameFields { get; set; } 17 | public bool RenameProps { get; set; } 18 | public bool RenameEvents { get; set; } 19 | 20 | internal static readonly ILog log = LogManager.GetLogger(typeof(Renamer)); 21 | 22 | 23 | static readonly string[] lockedMethods = new string[] { 24 | "Awake", 25 | "Start", 26 | "Update", 27 | "LateUpdate", 28 | "FixedUpdate", 29 | "Reset", 30 | "Reset", 31 | "OnMouseEnter", 32 | "OnMouseOver", 33 | "OnMouseExit", 34 | "OnMouseDown", 35 | "OnMouseUp", 36 | "OnMouseDrag", 37 | "OnTriggerEnter", 38 | "OnTriggerExit", 39 | "OnTriggerStay", 40 | "OnCollisionEnter", 41 | "OnCollisionExit", 42 | "OnCollisionStay", 43 | "OnControllerColliderHit", 44 | "OnJointBreak", 45 | "OnParticleCollision", 46 | "OnBecameVisible", 47 | "OnBecameInvisible", 48 | "OnLevelWasLoaded", 49 | "OnEnable", 50 | "OnDisable", 51 | "OnPreCull", 52 | "OnPreRender", 53 | "OnPostRender", 54 | "OnRenderObject", 55 | "OnWillRenderObject", 56 | "OnGUI", 57 | "OnRenderImage", 58 | "OnDrawGizmosSelected", 59 | "OnDrawGizmos", 60 | "OnApplicationPause", 61 | "OnApplicationQuit", 62 | "OnPlayerConnected", 63 | "OnServerInitialized", 64 | "OnConnectedToServer", 65 | "OnPlayerDisconnected", 66 | "OnDisconnectedFromServer", 67 | "OnFailedToConnect", 68 | "OnFailedToConnectToMasterServer", 69 | "OnNetworkInstantiate", 70 | "OnSerializeNetworkView", 71 | 72 | "GetEnumerator", 73 | }; 74 | 75 | ModuleDefMD module; 76 | List usedNames; 77 | Random rnd; 78 | 79 | public Renamer(ModuleDefMD module) 80 | { 81 | this.StrongRenaming = true; 82 | this.rnd = new Random(); 83 | this.usedNames = new List(); 84 | this.module = module; 85 | } 86 | 87 | public void RenameModule() 88 | { 89 | log.Info("Renaming things..."); 90 | foreach (TypeDef type in module.Types) 91 | { 92 | RenameType(type); 93 | } 94 | } 95 | 96 | void RenameType(TypeDef type) 97 | { 98 | if (type.FullName == "AsertSigning") 99 | return; 100 | 101 | string oldName = type.FullName; 102 | 103 | if (CanRenameType(type)) 104 | { 105 | string newName = GenerateNewName(); 106 | log.DebugFormat("Renaming class {0} to {1}", type.Name, newName); 107 | type.Name = newName; 108 | } 109 | 110 | foreach(var method in type.Methods) 111 | { 112 | string oldMethodName = method.Name; 113 | RenameMethod(type, oldName, method); 114 | if (RenameMethodParams) 115 | RenameMethodSignatures(oldName, oldMethodName, method); 116 | } 117 | 118 | foreach (var field in type.Fields) 119 | RenameField(oldName, field); 120 | 121 | foreach (var prop in type.Properties) 122 | RenameProperty(oldName, prop); 123 | 124 | foreach (var ev in type.Events) 125 | RenameEvent(oldName, ev); 126 | 127 | 128 | if (type.HasNestedTypes) 129 | foreach (TypeDef nested in type.NestedTypes) 130 | RenameType(nested); 131 | } 132 | 133 | void RenameMethod(TypeDef type, string realTypeName, MethodDef method) 134 | { 135 | if (!CanRenameMethod(realTypeName, method)) 136 | return; 137 | 138 | string newName = GenerateNewName(); 139 | log.DebugFormat("Renaming method {0}.{1}() to {2}", realTypeName, method.Name, newName); 140 | method.Name = newName; 141 | } 142 | 143 | void RenameMethodSignatures(string realTypeName, string realMethodName, MethodDef method) 144 | { 145 | foreach (var p in method.Parameters) 146 | { 147 | string newName = GenerateNewName(); 148 | log.DebugFormat("Renaming method parameter {0}.{1}({2}) to {3}", realTypeName, realMethodName, p.Name, newName); 149 | p.Name = newName; 150 | } 151 | } 152 | 153 | void RenameProperty(string realTypeName, PropertyDef prop) 154 | { 155 | if (!CanRenameProperty(realTypeName, prop)) 156 | return; 157 | string newName = GenerateNewName(); 158 | log.DebugFormat("Renaming property {0}.{1} to {2}", realTypeName, prop.Name, newName); 159 | prop.Name = newName; 160 | } 161 | 162 | void RenameEvent(string realTypeName, EventDef ev) 163 | { 164 | if (!CanRenameEvent(realTypeName, ev)) 165 | return; 166 | string newName = GenerateNewName(); 167 | log.DebugFormat("Renaming event {0}.{1} to {2}", realTypeName, ev.Name, newName); 168 | ev.Name = newName; 169 | } 170 | 171 | void RenameField(string realTypeName, FieldDef field) 172 | { 173 | if (!CanRenameField(realTypeName, field)) 174 | return; 175 | 176 | string newName = GenerateNewName(); 177 | log.DebugFormat("Renaming field {0}.{1} to {2}", realTypeName, field.Name, newName); 178 | //log.Debug("FLD: " + realTypeName + "." + field.Name + " ["+ field.FieldType +"]" + " >>> " + field.FieldType.IsGenericInstanceType); 179 | field.Name = newName; 180 | } 181 | 182 | 183 | bool CanRenameType(TypeDef type) 184 | { 185 | if (!RenameTypes) 186 | return false; 187 | if (type.IsRuntimeSpecialName || type.IsSpecialName) 188 | return false; 189 | if (type.IsImport) 190 | return false; 191 | if (type.IsGlobalModuleType) 192 | return false; 193 | if (IsTypeFromUnity(type)) 194 | return false; 195 | if (type.CustomAttributes.Any(a => a.TypeFullName.EndsWith("DoNotRename", StringComparison.InvariantCulture))) 196 | return false; 197 | 198 | return true; 199 | } 200 | 201 | bool IsTypeFromUnity(TypeDef type) 202 | { 203 | var bType = type.BaseType as ITypeDefOrRef; 204 | while (bType != null) 205 | { 206 | if (bType.FullName.Contains("UnityEngine")) 207 | return true; 208 | bType = bType.GetBaseType() as ITypeDefOrRef; 209 | } 210 | 211 | return false; 212 | } 213 | 214 | bool CanRenameMethod(string realTypeName, MethodDef method) 215 | { 216 | if (!RenameMethods) 217 | return false; 218 | if (IsTypeFromUnity(method.DeclaringType)) 219 | return false; 220 | if (method.IsRuntimeSpecialName || method.IsRuntime) 221 | return false; 222 | if (method.IsConstructor) 223 | return false; 224 | if (method.IsVirtual || method.IsAbstract || method.HasOverrides) //Not sure if both ruins 225 | return false; 226 | if (realTypeName.IndexOf("<>__AnonType", StringComparison.InvariantCulture) == 0) //Anonimous method make it hurt 227 | return false; 228 | if (method.DeclaringType.HasGenericParameters) //Generics too 229 | return false; 230 | if (method.DeclaringType.IsForwarder) 231 | return false; 232 | if (lockedMethods.Any(m => m == method.Name)) 233 | return false; 234 | if (method.CustomAttributes.Any(a => a.TypeFullName.EndsWith("DoNotRename", StringComparison.InvariantCulture))) 235 | return false; 236 | //if (IsMethodContainsReflection(method)) 237 | // return false; 238 | return true; 239 | } 240 | 241 | bool IsMethodContainsReflection(MethodDef method) 242 | { 243 | if (!method.HasBody) 244 | return false; 245 | var mbody = method.Body.Instructions; 246 | foreach (var instruction in mbody) 247 | { 248 | if (instruction.Operand != null && instruction.Operand.ToString().ToLower().Contains("reflection")) 249 | { 250 | return true; 251 | } 252 | } 253 | return false; 254 | } 255 | 256 | bool CanRenameField(string realTypeName, FieldDef field) 257 | { 258 | if (!RenameFields) 259 | return false; 260 | if (realTypeName.IndexOf("<>__AnonType", StringComparison.InvariantCulture) == 0) //Anonimous method make it hurt 261 | return false; 262 | if (field.IsRuntimeSpecialName || field.IsSpecialName) 263 | return false; 264 | if (field.DeclaringType.HasGenericParameters) 265 | return false; 266 | if (field.DeclaringType.IsSerializable && !field.IsNotSerialized) 267 | return false; 268 | if (field.IsPinvokeImpl) 269 | return false; 270 | if (field.IsLiteral && field.DeclaringType.IsEnum) 271 | return false; 272 | if (field.CustomAttributes.Any(a => a.TypeFullName.EndsWith("DoNotRename", StringComparison.InvariantCulture))) 273 | return false; 274 | return true; 275 | } 276 | 277 | bool CanRenameProperty(string realTypeName, PropertyDef prop) 278 | { 279 | if (!RenameProps) 280 | return false; 281 | if (prop.IsRuntimeSpecialName) 282 | return false; 283 | if (realTypeName.IndexOf("<>__AnonType", StringComparison.InvariantCulture) == 0) //Anonimous method make it hurt 284 | return false; 285 | if (prop.CustomAttributes.Any(a => a.TypeFullName.EndsWith("DoNotRename", StringComparison.InvariantCulture))) 286 | return false; 287 | return true; 288 | } 289 | 290 | bool CanRenameEvent(string realTypeName, EventDef ev) 291 | { 292 | if (!RenameEvents) 293 | return false; 294 | if (ev.IsRuntimeSpecialName || ev.IsSpecialName) 295 | return false; 296 | if (ev.CustomAttributes.Any(a => a.TypeFullName.EndsWith("DoNotRename", StringComparison.InvariantCulture))) 297 | return false; 298 | return true; 299 | } 300 | 301 | public string GenerateNewName(bool unicode = false) 302 | { 303 | Func getName = () => 304 | { 305 | if (StrongRenaming) 306 | return Utils.RandomStringUnicode(rnd, 8); 307 | else 308 | return Utils.RandomStringHex(rnd, 8); 309 | }; 310 | 311 | string str = getName(); 312 | while (usedNames.Contains(str)) 313 | { 314 | str = getName(); 315 | } 316 | usedNames.Add(str); 317 | return str; 318 | } 319 | } 320 | } 321 | -------------------------------------------------------------------------------- /AsertNet/Protection/Utils.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Text; 4 | 5 | namespace AsertNet.Protection 6 | { 7 | public class Utils 8 | { 9 | 10 | public static readonly char[] unicodeCharset = new char[] { } 11 | .Concat(Enumerable.Range(0x200b, 5).Select(ord => (char)ord)) 12 | .Concat(Enumerable.Range(0x2029, 6).Select(ord => (char)ord)) 13 | .Concat(Enumerable.Range(0x206a, 6).Select(ord => (char)ord)) 14 | .Except(new[] { '\u2029' }) 15 | .ToArray(); 16 | 17 | public static readonly string hexCharset = "abcdef1234567890"; 18 | 19 | 20 | public static string RandomStringUnicode(Random rnd, int length) 21 | { 22 | StringBuilder str = new StringBuilder(length); 23 | for (int i = 0; i < length; i++) 24 | { 25 | char c = unicodeCharset[rnd.Next(0, unicodeCharset.Length)]; 26 | str.Append(c); 27 | } 28 | return str.ToString(); 29 | } 30 | 31 | public static string RandomStringHex(Random rnd, int length) 32 | { 33 | StringBuilder str = new StringBuilder(length); 34 | for (int i = 0; i < length; i++) 35 | { 36 | char c = hexCharset[rnd.Next(0, hexCharset.Length)]; 37 | str.Append(c); 38 | } 39 | return str.ToString(); 40 | } 41 | 42 | 43 | } 44 | } 45 | -------------------------------------------------------------------------------- /AsertNet/Signing/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Diagnostics.CodeAnalysis; 4 | using System.IO; 5 | using Mono.Cecil; 6 | 7 | namespace AsertNet.Signing 8 | { 9 | 10 | [Serializable] 11 | public sealed class AssemblyInfo 12 | { 13 | public AssemblyInfo() 14 | { 15 | FilePath = string.Empty; 16 | } 17 | 18 | public string FilePath { get; internal set; } 19 | public byte[] Token { get; internal set; } 20 | public bool IsSigned { get; internal set; } 21 | 22 | public string HexToken 23 | { 24 | get 25 | { 26 | return BitConverter.ToString(Token).Replace("-", string.Empty); 27 | } 28 | } 29 | 30 | 31 | public static AssemblyInfo GetAssemblyInfo(string assemblyPath) 32 | { 33 | if (string.IsNullOrEmpty(assemblyPath)) 34 | throw new ArgumentNullException(nameof(assemblyPath)); 35 | 36 | if (!File.Exists(assemblyPath)) 37 | throw new FileNotFoundException("Could not find provided assembly file.", assemblyPath); 38 | 39 | var a = AssemblyDefinition.ReadAssembly(assemblyPath, GetReadParameters(assemblyPath)); 40 | 41 | return new AssemblyInfo() 42 | { 43 | FilePath = Path.GetFullPath(assemblyPath), 44 | IsSigned = (a.MainModule.Attributes & ModuleAttributes.StrongNameSigned) != 0, 45 | Token = a.Name.PublicKeyToken 46 | }; 47 | } 48 | 49 | public static ReaderParameters GetReadParameters(string assemblyPath) 50 | { 51 | var resolver = new DefaultAssemblyResolver(); 52 | 53 | if (!string.IsNullOrEmpty(assemblyPath) && File.Exists(assemblyPath)) 54 | resolver.AddSearchDirectory(Path.GetDirectoryName(assemblyPath)); 55 | 56 | ReaderParameters readParams = null; 57 | 58 | try 59 | { 60 | readParams = new ReaderParameters() { AssemblyResolver = resolver, ReadSymbols = File.Exists(Path.ChangeExtension(assemblyPath, ".pdb")) }; 61 | } 62 | catch (InvalidOperationException) 63 | { 64 | readParams = new ReaderParameters() { AssemblyResolver = resolver }; 65 | } 66 | 67 | return readParams; 68 | } 69 | } 70 | 71 | } -------------------------------------------------------------------------------- /AsertNet/Signing/Signer.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.IO; 3 | using System.Reflection; 4 | using System.Security.Cryptography; 5 | using Mono.Cecil; 6 | 7 | namespace AsertNet.Signing 8 | { 9 | public static class Signer 10 | { 11 | public static AssemblyInfo SignAssembly(string assemblyPath) 12 | { 13 | if (string.IsNullOrEmpty(assemblyPath)) 14 | throw new ArgumentNullException(nameof(assemblyPath)); 15 | 16 | if (!File.Exists(assemblyPath)) 17 | throw new FileNotFoundException("Could not find provided assembly file.", assemblyPath); 18 | 19 | bool writeSymbols = File.Exists(Path.ChangeExtension(assemblyPath, ".pdb")); 20 | 21 | // Get the assembly info and go from there. 22 | AssemblyInfo info = AssemblyInfo.GetAssemblyInfo(assemblyPath); 23 | 24 | // Don't sign assemblies with a strong-name signature. 25 | if (info.IsSigned) 26 | return info; 27 | 28 | AssemblyDefinition.ReadAssembly(assemblyPath, AssemblyInfo.GetReadParameters(assemblyPath)) 29 | .Write(assemblyPath, new WriterParameters() { StrongNameKeyPair = GenerateStrongNameKeyPair(), WriteSymbols = writeSymbols }); 30 | 31 | return AssemblyInfo.GetAssemblyInfo(assemblyPath); 32 | } 33 | 34 | public static StrongNameKeyPair GenerateStrongNameKeyPair() 35 | { 36 | using (var provider = new RSACryptoServiceProvider(1024, new CspParameters() { KeyNumber = 2 })) 37 | { 38 | return new StrongNameKeyPair(provider.ExportCspBlob(!provider.PublicOnly)); 39 | } 40 | } 41 | 42 | } 43 | } 44 | -------------------------------------------------------------------------------- /AsertNet/packages.config: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. 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If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /Libs/dnlib.dll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Agasper/asert-unity-protect-obfuscator/46a04ad9fa62d8e24ea857da086df5b28d1eb968/Libs/dnlib.dll -------------------------------------------------------------------------------- /Libs/dnlib.pdb: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Agasper/asert-unity-protect-obfuscator/46a04ad9fa62d8e24ea857da086df5b28d1eb968/Libs/dnlib.pdb -------------------------------------------------------------------------------- /Libs/log4net.dll: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Agasper/asert-unity-protect-obfuscator/46a04ad9fa62d8e24ea857da086df5b28d1eb968/Libs/log4net.dll -------------------------------------------------------------------------------- /Libs/log4net.pdb: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Agasper/asert-unity-protect-obfuscator/46a04ad9fa62d8e24ea857da086df5b28d1eb968/Libs/log4net.pdb -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Unity build obfuscator 2 | ===== 3 | License: *GNU GPL v3* 4 | 5 | Features: 6 | * Protecting/encrypting int, string constants 7 | * Renaming everything it can rename without affecting functionality 8 | * Adding checksum library verification 9 | 10 | ### How to use 11 | 12 | 1. Download latest release from https://github.com/Agasper/asert-unity-protect-obfuscator/releases 13 | 2. You need to locate two libraries *Assembly-CSharp.dll* and *UnityEngine.CoreModule.dll* within your Unity build. 14 | 3. Run 15 | 16 | ``` 17 | mono ./AsertNet.exe --filename="Assembly-CSharp.dll" \ 18 | --unitylib="UnityEngine.CoreModule.dll" \ 19 | --hideintegers --encryptstrings \ 20 | --antitamper --renameall 21 | ``` 22 | 23 | 4. Thats all 24 | 25 | ### For Android builds 26 | 27 | First you need to unpack apk file with https://ibotpeaches.github.io/Apktool/ 28 | Then obfuscate libraries and pack it back 29 | 30 | P.S. Don't forget to sign your APK again with a keystore 31 | 32 | ``` 33 | ./apktool d apk.apk 34 | mono ./AsertNet.exe --filename="./apk/assets/bin/Data/Managed/Assembly-CSharp.dll" \ 35 | --unitylib="./apk/assets/bin/Data/Managed/UnityEngine.CoreModule.dll" \ 36 | --hideintegers --encryptstrings \ 37 | --antitamper --renameall 38 | ./apktool-mac b apk -o result.apk 39 | jarsigner -keystore ./key.keystore -verbose result.apk "key name" 40 | ``` 41 | --------------------------------------------------------------------------------