mirror of https://github.com/Xpl0itR/protodec.git
Implement experimental backend to use LibCpp2IL to directly load an Il2Cpp compiled game assembly
This commit is contained in:
parent
2126f61cbf
commit
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GPG Key ID:
91798184109676AD
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@ -26,6 +26,9 @@ jobs:
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with:
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dotnet-version: '8.0.x'
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- name: Add samboy's nuget source
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run: dotnet nuget add source https://nuget.samboy.dev/v3/index.json
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- name: Build protodec
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run: dotnet publish --configuration Release --runtime ${{ matrix.runtime }} /p:Version=${{ github.ref_name }} /p:ContinuousIntegrationBuild=true
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14
README.md
14
README.md
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@ -1,11 +1,12 @@
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protodec
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========
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A tool to decompile protobuf classes compiled by [protoc](https://github.com/protocolbuffers/protobuf), from CIL assemblies back into .proto definitions.
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A tool to decompile [protoc](https://github.com/protocolbuffers/protobuf) compiled protobuf classes back into .proto definitions.
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Usage
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-----
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```
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Usage: [arguments...] [options...] [-h|--help] [--version]
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Usage: [command] [arguments...] [options...] [-h|--help] [--version]
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Use reflection backend to load target CIL assembly and its dependants.
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Arguments:
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[0] <string> Either the path to the target assembly or a directory of assemblies, all of which be parsed.
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@ -18,14 +19,19 @@ Options:
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--parse-service-servers Parses gRPC service definitions from server classes. (Optional)
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--parse-service-clients Parses gRPC service definitions from client classes. (Optional)
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--log-level <LogLevel> Logging severity level. (Default: Information)
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Commands:
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il2cpp Use LibCpp2IL backend to directly load Il2Cpp compiled game assembly. EXPERIMENTAL.
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```
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See per-command help message for more info.
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Limitations
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-----------
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- Integers are assumed to be (u)int32/64 as CIL doesn't differentiate between them and sint32/64 and (s)fixed32/64.
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- Package names are not preserved in protobuf compilation so naturally we cannot recover them during decompilation, which may result in naming conflicts.
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- When decompiling from [Il2CppDumper](https://github.com/Perfare/Il2CppDumper) DummyDLLs
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- The `Name` parameter of `OriginalNameAttribute` is not dumped. In this case, the CIL enum field names are used after conforming them to protobuf conventions
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- When decompiling from [Il2CppDumper](https://github.com/Perfare/Il2CppDumper) DummyDLLs or from an Il2Cpp assembly older than metadata version 29, due to the development branch of [LibCpp2Il](https://github.com/SamboyCoding/Cpp2IL/tree/development/LibCpp2IL) not yet recovering method bodies
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- The `Name` parameter of `OriginalNameAttribute` is not parsed. In this case, the CIL enum field names are used after conforming them to protobuf conventions.
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- The `Tool` parameter of `GeneratedCodeAttribute` is not compared against when parsing gRPC service methods, which may cause false positives in the event that another tool has generated methods in the service class.
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License
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-------
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@ -10,6 +10,7 @@ EndProject
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{22F217C3-0FC2-4D06-B5F3-AA1E3AFC402E}"
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ProjectSection(SolutionItems) = preProject
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README.md = README.md
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.github\workflows\release.yml = .github\workflows\release.yml
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EndProjectSection
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EndProject
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Global
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@ -20,6 +20,7 @@
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<ItemGroup>
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<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.0-preview.6.24327.7" />
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<PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
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<PackageReference Include="Samboy063.LibCpp2IL" Version="2022.1.0-development.1027" />
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<PackageReference Include="System.Reflection.MetadataLoadContext" Version="9.0.0-preview.6.24327.7" />
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<PackageReference Include="Xpl0itR.SystemEx" Version="1.2.0" />
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</ItemGroup>
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@ -11,7 +11,7 @@ using LibProtodec.Models.Cil;
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namespace LibProtodec.Loaders;
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public abstract class CilAssemblyLoader : IDisposable
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public abstract class CilAssemblyLoader
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{
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public IReadOnlyList<ICilType> LoadedTypes { get; protected init; }
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@ -43,7 +43,5 @@ public abstract class CilAssemblyLoader : IDisposable
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&& type.CustomAttributes.Any(attribute => attribute.Type == bindServiceMethodAttribute));
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}
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public virtual void Dispose() { }
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protected abstract ICilType FindType(string typeFullName, string assemblySimpleName);
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}
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@ -16,7 +16,7 @@ using Microsoft.Extensions.Logging;
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namespace LibProtodec.Loaders;
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public sealed class ClrAssemblyLoader : CilAssemblyLoader
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public sealed class ClrAssemblyLoader : CilAssemblyLoader, IDisposable
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{
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public readonly MetadataLoadContext LoadContext;
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@ -55,7 +55,7 @@ public sealed class ClrAssemblyLoader : CilAssemblyLoader
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return ClrType.GetOrCreate(clrType);
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}
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public override void Dispose() =>
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public void Dispose() =>
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LoadContext.Dispose();
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/// <summary>
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@ -0,0 +1,64 @@
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// Copyright © 2024 Xpl0itR
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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using System;
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using System.Linq;
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using AssetRipper.Primitives;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL;
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using LibCpp2IL.Logging;
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using LibCpp2IL.Metadata;
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using LibCpp2IL.Reflection;
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using LibProtodec.Models.Cil;
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using LibProtodec.Models.Cil.Il2Cpp;
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using Microsoft.Extensions.Logging;
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namespace LibProtodec.Loaders;
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public sealed class Il2CppAssemblyLoader : CilAssemblyLoader
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{
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public Il2CppAssemblyLoader(string assemblyPath, string metadataPath, UnityVersion unityVersion, ILoggerFactory? loggerFactory = null)
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{
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if (loggerFactory is not null)
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{
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LibLogger.Writer = new LibCpp2IlLogger(
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loggerFactory.CreateLogger(nameof(LibCpp2IL)));
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}
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if (!LibCpp2IlMain.LoadFromFile(assemblyPath, metadataPath, unityVersion))
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ThrowHelper.ThrowInvalidDataException("Failed to load IL2Cpp assembly!");
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this.LoadedTypes = LibCpp2IlMain.TheMetadata!.typeDefs.Select(Il2CppType.GetOrCreate).ToList();
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loggerFactory?.CreateLogger<Il2CppAssemblyLoader>()
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.LogLoadedTypeAndAssemblyCount(this.LoadedTypes.Count, LibCpp2IlMain.TheMetadata.imageDefinitions.Length);
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}
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protected override ICilType FindType(string typeFullName, string assemblySimpleName)
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{
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Il2CppTypeDefinition? type = LibCpp2IlReflection.GetTypeByFullName(typeFullName);
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Guard.IsNotNull(type);
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return Il2CppType.GetOrCreate(type);
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}
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private sealed class LibCpp2IlLogger(ILogger logger) : LogWriter
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{
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private static readonly Func<string, Exception?, string> MessageFormatter = (message, _) => message.Trim();
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public override void Info(string message) =>
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logger.Log(LogLevel.Information, default(EventId), message, null, MessageFormatter);
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public override void Warn(string message) =>
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logger.Log(LogLevel.Warning, default(EventId), message, null, MessageFormatter);
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public override void Error(string message) =>
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logger.Log(LogLevel.Error, default(EventId), message, null, MessageFormatter);
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public override void Verbose(string message) =>
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logger.Log(LogLevel.Debug, default(EventId), message, null, MessageFormatter);
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}
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}
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@ -15,6 +15,9 @@ public sealed class ClrAttribute(CustomAttributeData clrAttribute) : ICilAttribu
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private ICilType? _type;
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private object?[]? _constructorArgumentValues;
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public bool CanReadConstructorArgumentValues =>
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true;
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public ICilType Type =>
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_type ??= ClrType.GetOrCreate(
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clrAttribute.AttributeType);
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@ -12,5 +12,7 @@ public interface ICilAttribute
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{
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ICilType Type { get; }
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bool CanReadConstructorArgumentValues { get; }
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IList<object?> ConstructorArgumentValues { get; }
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}
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@ -0,0 +1,25 @@
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// Copyright © 2024 Xpl0itR
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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using System.Collections.Generic;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL.Metadata;
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namespace LibProtodec.Models.Cil.Il2Cpp;
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public sealed class Il2CppAttribute(Il2CppTypeDefinition il2CppAttrType, object?[]? ctorArgValues) : ICilAttribute
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{
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public ICilType Type =>
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Il2CppType.GetOrCreate(il2CppAttrType);
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public bool CanReadConstructorArgumentValues =>
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ctorArgValues is not null;
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public IList<object?> ConstructorArgumentValues =>
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ctorArgValues
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?? ThrowHelper.ThrowNotSupportedException<IList<object?>>(
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"Attribute constructor argument parsing is only available on Il2Cpp metadata version 29 or greater.");
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}
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@ -0,0 +1,40 @@
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// Copyright © 2024 Xpl0itR
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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using System.Reflection;
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using LibCpp2IL.Metadata;
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namespace LibProtodec.Models.Cil.Il2Cpp;
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public sealed class Il2CppField(Il2CppFieldDefinition il2CppField) : Il2CppMember, ICilField
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{
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private readonly FieldAttributes _attributes =
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(FieldAttributes)il2CppField.RawFieldType!.Attrs;
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public string Name =>
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il2CppField.Name!;
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public object? ConstantValue =>
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il2CppField.DefaultValue!.Value;
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public bool IsLiteral =>
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(_attributes & FieldAttributes.Literal) != 0;
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public bool IsPublic =>
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(_attributes & FieldAttributes.Public) != 0;
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public bool IsStatic =>
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(_attributes & FieldAttributes.Static) != 0;
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protected override Il2CppImageDefinition DeclaringAssembly =>
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il2CppField.FieldType!.baseType!.DeclaringAssembly!;
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protected override int CustomAttributeIndex =>
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il2CppField.customAttributeIndex;
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protected override uint Token =>
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il2CppField.token;
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}
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@ -0,0 +1,306 @@
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// Copyright © 2024 Xpl0itR
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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using System;
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using System.Collections.Generic;
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using System.Text;
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using SystemEx.Memory;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL;
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using LibCpp2IL.BinaryStructures;
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using LibCpp2IL.Metadata;
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namespace LibProtodec.Models.Cil.Il2Cpp;
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public abstract class Il2CppMember
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{
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private ICilAttribute[]? _customAttributes;
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public IList<ICilAttribute> CustomAttributes
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{
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get
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{
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if (_customAttributes is null)
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{
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if (LibCpp2IlMain.MetadataVersion < 29f)
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{
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int attrTypeRngIdx = LibCpp2IlMain.MetadataVersion <= 24f
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? CustomAttributeIndex
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: BinarySearchToken(
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LibCpp2IlMain.TheMetadata!.attributeTypeRanges,
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Token,
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DeclaringAssembly.customAttributeStart,
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(int)DeclaringAssembly.customAttributeCount);
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if (attrTypeRngIdx < 0)
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return _customAttributes = Array.Empty<ICilAttribute>();
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Il2CppCustomAttributeTypeRange attrTypeRng = LibCpp2IlMain.TheMetadata!.attributeTypeRanges[attrTypeRngIdx];
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_customAttributes = new ICilAttribute[attrTypeRng.count];
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for (int attrTypeIdx = 0; attrTypeIdx < attrTypeRng.count; attrTypeIdx++)
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{
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int typeIndex = LibCpp2IlMain.TheMetadata.attributeTypes[attrTypeRng.start + attrTypeIdx];
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var type = LibCpp2IlMain.Binary!.GetType(typeIndex);
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var typeDef = LibCpp2IlMain.TheMetadata.typeDefs[type.Data.ClassIndex];
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_customAttributes[attrTypeIdx] = new Il2CppAttribute(typeDef, null);
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}
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}
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else
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{
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int attrDataRngIdx = BinarySearchToken(
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LibCpp2IlMain.TheMetadata!.AttributeDataRanges,
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Token,
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DeclaringAssembly.customAttributeStart,
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(int)DeclaringAssembly.customAttributeCount);
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if (attrDataRngIdx < 0)
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return _customAttributes = Array.Empty<ICilAttribute>();
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Il2CppCustomAttributeDataRange attrDataRange = LibCpp2IlMain.TheMetadata.AttributeDataRanges[attrDataRngIdx];
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Il2CppCustomAttributeDataRange attrDataRngNext = LibCpp2IlMain.TheMetadata.AttributeDataRanges[attrDataRngIdx + 1];
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long attrDataStart = LibCpp2IlMain.TheMetadata.metadataHeader.attributeDataOffset + attrDataRange.startOffset;
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long attrDataEnd = LibCpp2IlMain.TheMetadata.metadataHeader.attributeDataOffset + attrDataRngNext.startOffset;
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byte[] attrData = LibCpp2IlMain.TheMetadata.ReadByteArrayAtRawAddress(attrDataStart, (int)(attrDataEnd - attrDataStart));
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MemoryReader reader = new(attrData);
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int attributeCount = (int)ReadUnityCompressedUInt32(ref reader);
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Span<uint> ctorIndices = stackalloc uint[attributeCount];
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for (int i = 0; i < attributeCount; i++)
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ctorIndices[i] = reader.ReadUInt32LittleEndian();
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_customAttributes = new ICilAttribute[attributeCount];
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for (int i = 0; i < attributeCount; i++)
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{
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uint ctorArgCount = ReadUnityCompressedUInt32(ref reader);
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uint fieldCount = ReadUnityCompressedUInt32(ref reader);
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uint propCount = ReadUnityCompressedUInt32(ref reader);
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object?[] ctorArgValues = ctorArgCount > 0
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? new object[ctorArgCount]
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: Array.Empty<object?>();
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for (int j = 0; j < ctorArgCount; j++)
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{
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ctorArgValues[j] = ReadValue(ref reader);
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}
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for (uint j = 0; j < fieldCount; j++)
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{
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ReadValue(ref reader);
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ResolveMember(ref reader);
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}
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for (uint j = 0; j < propCount; j++)
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{
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ReadValue(ref reader);
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ResolveMember(ref reader);
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}
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Il2CppMethodDefinition attrCtor = LibCpp2IlMain.TheMetadata.methodDefs[ctorIndices[i]];
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Il2CppTypeDefinition attrType = LibCpp2IlMain.TheMetadata.typeDefs[attrCtor.declaringTypeIdx];
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||||
|
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_customAttributes[i] = new Il2CppAttribute(attrType, ctorArgValues);
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||||
}
|
||||
}
|
||||
}
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||||
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return _customAttributes;
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||||
}
|
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}
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protected abstract Il2CppImageDefinition DeclaringAssembly { get; }
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||||
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protected abstract int CustomAttributeIndex { get; }
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||||
|
||||
protected abstract uint Token { get; }
|
||||
|
||||
private static int BinarySearchToken(IReadOnlyList<IIl2CppTokenProvider> source, uint token, int start, int count)
|
||||
{
|
||||
int lo = start;
|
||||
int hi = start + count - 1;
|
||||
while (lo <= hi)
|
||||
{
|
||||
int i = lo + ((hi - lo) >> 1);
|
||||
|
||||
switch (source[i].Token.CompareTo(token))
|
||||
{
|
||||
case 0:
|
||||
return i;
|
||||
case < 0:
|
||||
lo = i + 1;
|
||||
break;
|
||||
default:
|
||||
hi = i - 1;
|
||||
break;
|
||||
}
|
||||
}
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||||
|
||||
return ~lo;
|
||||
}
|
||||
|
||||
private static uint ReadUnityCompressedUInt32(ref MemoryReader reader)
|
||||
{
|
||||
byte byt = reader.ReadByte();
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||||
|
||||
switch (byt)
|
||||
{
|
||||
case < 128:
|
||||
return byt;
|
||||
case 240:
|
||||
return reader.ReadUInt32LittleEndian();
|
||||
case 254:
|
||||
return uint.MaxValue - 1;
|
||||
case byte.MaxValue:
|
||||
return uint.MaxValue;
|
||||
}
|
||||
|
||||
if ((byt & 192) == 192)
|
||||
{
|
||||
return (byt & ~192U) << 24
|
||||
| ((uint)reader.ReadByte() << 16)
|
||||
| ((uint)reader.ReadByte() << 8)
|
||||
| reader.ReadByte();
|
||||
}
|
||||
|
||||
if ((byt & 128) == 128)
|
||||
{
|
||||
return (byt & ~128U) << 8
|
||||
| reader.ReadByte();
|
||||
}
|
||||
|
||||
return ThrowHelper.ThrowInvalidDataException<uint>();
|
||||
}
|
||||
|
||||
private static int ReadUnityCompressedInt32(ref MemoryReader reader)
|
||||
{
|
||||
uint unsigned = ReadUnityCompressedUInt32(ref reader);
|
||||
if (unsigned == uint.MaxValue)
|
||||
return int.MinValue;
|
||||
|
||||
bool isNegative = (unsigned & 1) == 1;
|
||||
unsigned >>= 1;
|
||||
|
||||
return isNegative
|
||||
? -(int)(unsigned + 1)
|
||||
: (int)unsigned;
|
||||
}
|
||||
|
||||
private static object? ReadValue(ref MemoryReader reader)
|
||||
{
|
||||
Il2CppTypeEnum type = (Il2CppTypeEnum)reader.ReadByte();
|
||||
return ReadValue(ref reader, type);
|
||||
}
|
||||
|
||||
private static object? ReadValue(ref MemoryReader reader, Il2CppTypeEnum type)
|
||||
{
|
||||
switch (type)
|
||||
{
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_ENUM:
|
||||
Il2CppTypeEnum underlyingType = ReadEnumUnderlyingType(ref reader);
|
||||
return ReadValue(ref reader, underlyingType);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_SZARRAY:
|
||||
return ReadSzArray(ref reader);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_IL2CPP_TYPE_INDEX:
|
||||
int typeIndex = ReadUnityCompressedInt32(ref reader);
|
||||
return LibCpp2IlMain.Binary!.GetType(typeIndex);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_BOOLEAN:
|
||||
return reader.ReadBoolean();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_CHAR:
|
||||
return (char)reader.ReadInt16LittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_I1:
|
||||
return reader.ReadSByte();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_U1:
|
||||
return reader.ReadByte();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_I2:
|
||||
return reader.ReadInt16LittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_U2:
|
||||
return reader.ReadUInt16LittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_I4:
|
||||
return ReadUnityCompressedInt32(ref reader);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_U4:
|
||||
return ReadUnityCompressedUInt32(ref reader);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_I8:
|
||||
return reader.ReadInt64LittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_U8:
|
||||
return reader.ReadUInt64LittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_R4:
|
||||
return reader.ReadSingleLittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_R8:
|
||||
return reader.ReadDoubleLittleEndian();
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_STRING:
|
||||
return ReadString(ref reader);
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_CLASS:
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_OBJECT:
|
||||
case Il2CppTypeEnum.IL2CPP_TYPE_GENERICINST:
|
||||
default:
|
||||
return ThrowHelper.ThrowNotSupportedException<object>();
|
||||
}
|
||||
}
|
||||
|
||||
private static Il2CppTypeEnum ReadEnumUnderlyingType(ref MemoryReader reader)
|
||||
{
|
||||
int typeIdx = ReadUnityCompressedInt32(ref reader);
|
||||
var enumType = LibCpp2IlMain.Binary!.GetType(typeIdx);
|
||||
var underlyingType = LibCpp2IlMain.Binary.GetType(
|
||||
enumType.AsClass().ElementTypeIndex);
|
||||
|
||||
return underlyingType.Type;
|
||||
}
|
||||
|
||||
private static object?[]? ReadSzArray(ref MemoryReader reader)
|
||||
{
|
||||
int arrayLength = ReadUnityCompressedInt32(ref reader);
|
||||
if (arrayLength == -1)
|
||||
return null;
|
||||
|
||||
Il2CppTypeEnum arrayType = (Il2CppTypeEnum)reader.ReadByte();
|
||||
if (arrayType == Il2CppTypeEnum.IL2CPP_TYPE_ENUM)
|
||||
arrayType = ReadEnumUnderlyingType(ref reader);
|
||||
|
||||
bool typePrefixed = reader.ReadBoolean();
|
||||
if (typePrefixed && arrayType != Il2CppTypeEnum.IL2CPP_TYPE_OBJECT)
|
||||
ThrowHelper.ThrowInvalidDataException("Array elements are type-prefixed, but the array type is not object");
|
||||
|
||||
object?[] array = new object?[arrayLength];
|
||||
for (int i = 0; i < arrayLength; i++)
|
||||
{
|
||||
Il2CppTypeEnum elementType = typePrefixed
|
||||
? (Il2CppTypeEnum)reader.ReadByte()
|
||||
: arrayType;
|
||||
|
||||
array[i] = ReadValue(ref reader, elementType);
|
||||
}
|
||||
|
||||
return array;
|
||||
}
|
||||
|
||||
private static string? ReadString(ref MemoryReader reader)
|
||||
{
|
||||
int length = ReadUnityCompressedInt32(ref reader);
|
||||
if (length == -1)
|
||||
return null;
|
||||
|
||||
ReadOnlySpan<byte> bytes = reader.ReadBytes(length);
|
||||
return Encoding.UTF8.GetString(bytes);
|
||||
}
|
||||
|
||||
private static void ResolveMember(ref MemoryReader reader)
|
||||
{
|
||||
// We don't care about attribute properties or fields,
|
||||
// so we just read enough to exhaust the stream
|
||||
|
||||
int memberIndex = ReadUnityCompressedInt32(ref reader);
|
||||
if (memberIndex < 0)
|
||||
{
|
||||
uint typeIndex = ReadUnityCompressedUInt32(ref reader);
|
||||
memberIndex = -(memberIndex + 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,57 @@
|
|||
// Copyright © 2024 Xpl0itR
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
using System.Collections.Generic;
|
||||
using System.Reflection;
|
||||
using LibCpp2IL;
|
||||
using LibCpp2IL.Metadata;
|
||||
using LibCpp2IL.Reflection;
|
||||
|
||||
namespace LibProtodec.Models.Cil.Il2Cpp;
|
||||
|
||||
public sealed class Il2CppMethod(Il2CppMethodDefinition il2CppMethod) : Il2CppMember, ICilMethod
|
||||
{
|
||||
public string Name =>
|
||||
il2CppMethod.Name!;
|
||||
|
||||
public bool IsInherited =>
|
||||
false;
|
||||
|
||||
public bool IsConstructor =>
|
||||
Name is ".ctor" or ".cctor";
|
||||
|
||||
public bool IsPublic =>
|
||||
(il2CppMethod.Attributes & MethodAttributes.Public) != 0;
|
||||
|
||||
public bool IsStatic =>
|
||||
(il2CppMethod.Attributes & MethodAttributes.Static) != 0;
|
||||
|
||||
public bool IsVirtual =>
|
||||
(il2CppMethod.Attributes & MethodAttributes.Virtual) != 0;
|
||||
|
||||
public ICilType ReturnType =>
|
||||
Il2CppType.GetOrCreate(
|
||||
LibCpp2ILUtils.GetTypeReflectionData(
|
||||
LibCpp2IlMain.Binary!.GetType(
|
||||
il2CppMethod.returnTypeIdx)));
|
||||
|
||||
public IEnumerable<ICilType> GetParameterTypes()
|
||||
{
|
||||
foreach (Il2CppParameterReflectionData parameter in il2CppMethod.Parameters!)
|
||||
{
|
||||
yield return Il2CppType.GetOrCreate(parameter.Type);
|
||||
}
|
||||
}
|
||||
|
||||
protected override Il2CppImageDefinition DeclaringAssembly =>
|
||||
il2CppMethod.DeclaringType!.DeclaringAssembly!;
|
||||
|
||||
protected override int CustomAttributeIndex =>
|
||||
il2CppMethod.customAttributeIndex;
|
||||
|
||||
protected override uint Token =>
|
||||
il2CppMethod.token;
|
||||
}
|
||||
|
|
@ -0,0 +1,56 @@
|
|||
// Copyright © 2024 Xpl0itR
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
using System.Linq;
|
||||
using LibCpp2IL;
|
||||
using LibCpp2IL.Metadata;
|
||||
|
||||
namespace LibProtodec.Models.Cil.Il2Cpp;
|
||||
|
||||
public sealed class Il2CppProperty(Il2CppPropertyDefinition il2CppProperty, Il2CppTypeDefinition declaringType) : Il2CppMember, ICilProperty
|
||||
{
|
||||
private Il2CppMethod? _getter;
|
||||
private Il2CppMethod? _setter;
|
||||
|
||||
public string Name =>
|
||||
il2CppProperty.Name!;
|
||||
|
||||
public bool IsInherited =>
|
||||
false;
|
||||
|
||||
public bool CanRead =>
|
||||
il2CppProperty.get >= 0;
|
||||
|
||||
public bool CanWrite =>
|
||||
il2CppProperty.set >= 0;
|
||||
|
||||
public ICilMethod? Getter =>
|
||||
CanRead
|
||||
? _getter ??= new Il2CppMethod(
|
||||
LibCpp2IlMain.TheMetadata!.methodDefs[
|
||||
declaringType.FirstMethodIdx + il2CppProperty.get])
|
||||
: null;
|
||||
|
||||
public ICilMethod? Setter =>
|
||||
CanWrite
|
||||
? _setter ??= new Il2CppMethod(
|
||||
LibCpp2IlMain.TheMetadata!.methodDefs[
|
||||
declaringType.FirstMethodIdx + il2CppProperty.set])
|
||||
: null;
|
||||
|
||||
public ICilType Type =>
|
||||
Getter?.ReturnType
|
||||
?? Setter!.GetParameterTypes().First();
|
||||
|
||||
protected override Il2CppImageDefinition DeclaringAssembly =>
|
||||
declaringType.DeclaringAssembly!;
|
||||
|
||||
protected override int CustomAttributeIndex =>
|
||||
il2CppProperty.customAttributeIndex;
|
||||
|
||||
protected override uint Token =>
|
||||
il2CppProperty.token;
|
||||
}
|
||||
|
|
@ -0,0 +1,197 @@
|
|||
// Copyright © 2024 Xpl0itR
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla Public
|
||||
// License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
using System;
|
||||
using System.Collections.Concurrent;
|
||||
using System.Collections.Generic;
|
||||
using System.Reflection;
|
||||
using CommunityToolkit.Diagnostics;
|
||||
using LibCpp2IL;
|
||||
using LibCpp2IL.Metadata;
|
||||
using LibCpp2IL.Reflection;
|
||||
|
||||
namespace LibProtodec.Models.Cil.Il2Cpp;
|
||||
|
||||
public sealed class Il2CppType : Il2CppMember, ICilType
|
||||
{
|
||||
private readonly Il2CppTypeDefinition _il2CppType;
|
||||
private readonly Il2CppTypeReflectionData[] _genericArgs;
|
||||
private ICilType[]? _genericTypeArguments;
|
||||
|
||||
private Il2CppType(Il2CppTypeDefinition il2CppType, Il2CppTypeReflectionData[] genericArgs) =>
|
||||
(_il2CppType, _genericArgs) = (il2CppType, genericArgs);
|
||||
|
||||
public string Name =>
|
||||
_il2CppType.Name!;
|
||||
|
||||
public string FullName =>
|
||||
_il2CppType.FullName!;
|
||||
|
||||
public string? Namespace =>
|
||||
_il2CppType.Namespace;
|
||||
|
||||
public string DeclaringAssemblyName =>
|
||||
LibCpp2IlMain.TheMetadata!.GetStringFromIndex(
|
||||
DeclaringAssembly.nameIndex);
|
||||
|
||||
public ICilType? DeclaringType =>
|
||||
IsNested
|
||||
? GetOrCreate(
|
||||
LibCpp2ILUtils.GetTypeReflectionData(
|
||||
LibCpp2IlMain.Binary!.GetType(
|
||||
_il2CppType.DeclaringTypeIndex)))
|
||||
: null;
|
||||
|
||||
public ICilType? BaseType =>
|
||||
_il2CppType.ParentIndex == -1
|
||||
? null
|
||||
: GetOrCreate(
|
||||
LibCpp2ILUtils.GetTypeReflectionData(
|
||||
LibCpp2IlMain.Binary!.GetType(
|
||||
_il2CppType.ParentIndex)));
|
||||
|
||||
public bool IsAbstract =>
|
||||
_il2CppType.IsAbstract;
|
||||
|
||||
public bool IsClass =>
|
||||
(_il2CppType.Attributes & TypeAttributes.ClassSemanticsMask) == TypeAttributes.Class
|
||||
&& !_il2CppType.IsValueType;
|
||||
|
||||
public bool IsEnum =>
|
||||
_il2CppType.IsEnumType;
|
||||
|
||||
public bool IsNested =>
|
||||
_il2CppType.DeclaringTypeIndex >= 0;
|
||||
|
||||
public bool IsSealed =>
|
||||
(_il2CppType.Attributes & TypeAttributes.Sealed) != 0;
|
||||
|
||||
public IList<ICilType> GenericTypeArguments
|
||||
{
|
||||
get
|
||||
{
|
||||
if (_genericTypeArguments is null)
|
||||
{
|
||||
_genericTypeArguments = _genericArgs.Length < 1
|
||||
? Array.Empty<ICilType>()
|
||||
: new ICilType[_genericArgs.Length];
|
||||
|
||||
for (int i = 0; i < _genericArgs.Length; i++)
|
||||
{
|
||||
_genericTypeArguments[i] = GetOrCreate(_genericArgs[i]);
|
||||
}
|
||||
}
|
||||
|
||||
return _genericTypeArguments;
|
||||
}
|
||||
}
|
||||
|
||||
public IEnumerable<ICilField> GetFields()
|
||||
{
|
||||
for (int i = 0; i < _il2CppType.FieldCount; i++)
|
||||
{
|
||||
yield return new Il2CppField(
|
||||
LibCpp2IlMain.TheMetadata!.fieldDefs[
|
||||
_il2CppType.FirstFieldIdx + i]);
|
||||
}
|
||||
}
|
||||
|
||||
public IEnumerable<ICilMethod> GetMethods()
|
||||
{
|
||||
for (int i = 0; i < _il2CppType.MethodCount; i++)
|
||||
{
|
||||
yield return new Il2CppMethod(
|
||||
LibCpp2IlMain.TheMetadata!.methodDefs[
|
||||
_il2CppType.FirstMethodIdx + i]);
|
||||
}
|
||||
}
|
||||
|
||||
public IEnumerable<ICilType> GetNestedTypes()
|
||||
{
|
||||
for (int i = 0; i < _il2CppType.NestedTypeCount; i++)
|
||||
{
|
||||
yield return GetOrCreate(
|
||||
LibCpp2IlMain.TheMetadata!.typeDefs[
|
||||
LibCpp2IlMain.TheMetadata.nestedTypeIndices[
|
||||
_il2CppType.NestedTypesStart + i]]);
|
||||
}
|
||||
}
|
||||
|
||||
public IEnumerable<ICilProperty> GetProperties()
|
||||
{
|
||||
for (int i = 0; i < _il2CppType.PropertyCount; i++)
|
||||
{
|
||||
yield return new Il2CppProperty(
|
||||
LibCpp2IlMain.TheMetadata!.propertyDefs[
|
||||
_il2CppType.FirstPropertyId + i],
|
||||
_il2CppType);
|
||||
}
|
||||
}
|
||||
|
||||
public bool IsAssignableTo(ICilType type)
|
||||
{
|
||||
if (type is Il2CppType il2CppType)
|
||||
{
|
||||
return IsAssignableTo(_il2CppType, il2CppType._il2CppType);
|
||||
}
|
||||
|
||||
return ThrowHelper.ThrowNotSupportedException<bool>();
|
||||
}
|
||||
|
||||
protected override Il2CppImageDefinition DeclaringAssembly =>
|
||||
_il2CppType.DeclaringAssembly!;
|
||||
|
||||
protected override int CustomAttributeIndex =>
|
||||
_il2CppType.CustomAttributeIndex;
|
||||
|
||||
protected override uint Token =>
|
||||
_il2CppType.Token;
|
||||
|
||||
|
||||
private static readonly ConcurrentDictionary<string, Il2CppType> TypeLookup = [];
|
||||
|
||||
public static ICilType GetOrCreate(Il2CppTypeDefinition il2CppType) =>
|
||||
TypeLookup.GetOrAdd(
|
||||
il2CppType.FullName!,
|
||||
static (_, il2CppType) =>
|
||||
new Il2CppType(il2CppType, Array.Empty<Il2CppTypeReflectionData>()),
|
||||
il2CppType);
|
||||
|
||||
public static ICilType GetOrCreate(Il2CppTypeReflectionData il2CppTypeData)
|
||||
{
|
||||
Guard.IsTrue(il2CppTypeData.isType);
|
||||
|
||||
return TypeLookup.GetOrAdd(
|
||||
il2CppTypeData.ToString(),
|
||||
static (_, il2CppTypeData) =>
|
||||
new Il2CppType(il2CppTypeData.baseType!, il2CppTypeData.genericParams),
|
||||
il2CppTypeData);
|
||||
}
|
||||
|
||||
private static bool IsAssignableTo(Il2CppTypeDefinition thisType, Il2CppTypeDefinition baseType)
|
||||
{
|
||||
if (baseType.IsInterface)
|
||||
{
|
||||
foreach (Il2CppTypeReflectionData @interface in thisType.Interfaces!)
|
||||
{
|
||||
if (@interface.baseType == baseType)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (thisType == baseType)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
Il2CppTypeDefinition? thisTypeBaseType = thisType.BaseType?.baseType;
|
||||
|
||||
return thisTypeBaseType is not null
|
||||
&& IsAssignableTo(thisTypeBaseType, baseType);
|
||||
}
|
||||
}
|
||||
|
|
@ -572,7 +572,7 @@ public class ProtodecContext
|
|||
|
||||
protected string TranslateEnumFieldName(IEnumerable<ICilAttribute> attributes, string fieldName, string enumName)
|
||||
{
|
||||
if (attributes.SingleOrDefault(static attr => attr.Type.Name == "OriginalNameAttribute")
|
||||
if (attributes.SingleOrDefault(static attr => attr is { CanReadConstructorArgumentValues: true, Type.Name: "OriginalNameAttribute" })
|
||||
?.ConstructorArgumentValues[0] is string originalName)
|
||||
{
|
||||
return originalName;
|
||||
|
|
@ -628,7 +628,8 @@ public class ProtodecContext
|
|||
|
||||
protected static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool) =>
|
||||
attributes.Any(attr => attr.Type.Name == nameof(GeneratedCodeAttribute)
|
||||
&& attr.ConstructorArgumentValues[0] as string == tool);
|
||||
&& (!attr.CanReadConstructorArgumentValues
|
||||
|| attr.ConstructorArgumentValues[0] as string == tool));
|
||||
|
||||
protected static bool HasNonUserCodeAttribute(IEnumerable<ICilAttribute> attributes) =>
|
||||
attributes.Any(static attr => attr.Type.Name == nameof(DebuggerNonUserCodeAttribute));
|
||||
|
|
|
|||
|
|
@ -7,7 +7,9 @@
|
|||
using System.CodeDom.Compiler;
|
||||
using System.Collections.Generic;
|
||||
using System.IO;
|
||||
using AssetRipper.Primitives;
|
||||
using ConsoleAppFramework;
|
||||
using LibCpp2IL;
|
||||
using LibProtodec;
|
||||
using LibProtodec.Loaders;
|
||||
using LibProtodec.Models.Cil;
|
||||
|
|
@ -21,7 +23,7 @@ app.Run(args);
|
|||
internal sealed class Commands
|
||||
{
|
||||
/// <summary>
|
||||
/// A tool to decompile protobuf classes compiled by protoc, from CIL assemblies back into .proto definitions.
|
||||
/// Use reflection backend to load target CIL assembly and its dependants.
|
||||
/// </summary>
|
||||
/// <param name="targetPath">Either the path to the target assembly or a directory of assemblies, all of which be parsed.</param>
|
||||
/// <param name="outPath">An existing directory to output into individual files, otherwise output to a single file.</param>
|
||||
|
|
@ -41,6 +43,88 @@ internal sealed class Commands
|
|||
bool parseServiceServers,
|
||||
bool parseServiceClients,
|
||||
LogLevel logLevel = LogLevel.Information)
|
||||
{
|
||||
using ILoggerFactory loggerFactory = CreateLoggerFactory(logLevel);
|
||||
ILogger logger = CreateProtodecLogger(loggerFactory);
|
||||
|
||||
logger.LogInformation("Loading target assemblies...");
|
||||
using ClrAssemblyLoader loader = new(targetPath, loggerFactory.CreateLogger<ClrAssemblyLoader>());
|
||||
|
||||
Handle(
|
||||
loader,
|
||||
outPath,
|
||||
skipEnums,
|
||||
includePropertiesWithoutNonUserCodeAttribute,
|
||||
includeServiceMethodsWithoutGeneratedCodeAttribute,
|
||||
parseServiceServers,
|
||||
parseServiceClients,
|
||||
loggerFactory,
|
||||
logger);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Use LibCpp2IL backend to directly load Il2Cpp compiled game assembly. EXPERIMENTAL.
|
||||
/// </summary>
|
||||
/// <param name="gameAssembly">The path to the game assembly DLL.</param>
|
||||
/// <param name="globalMetadata">The path to the global-metadata.dat file.</param>
|
||||
/// <param name="unityVersion">The version of Unity which was used to create the metadata file or alternatively, the path to the globalgamemanagers or the data.unity3d file.</param>
|
||||
/// <param name="outPath">An existing directory to output into individual files, otherwise output to a single file.</param>
|
||||
/// <param name="logLevel">Logging severity level.</param>
|
||||
/// <param name="parseServiceServers">Parses gRPC service definitions from server classes.</param>
|
||||
/// <param name="parseServiceClients">Parses gRPC service definitions from client classes.</param>
|
||||
/// <param name="skipEnums">Skip parsing enums and replace references to them with int32.</param>
|
||||
/// <param name="includePropertiesWithoutNonUserCodeAttribute">Includes properties that aren't decorated with `DebuggerNonUserCode` when parsing.</param>
|
||||
/// <param name="includeServiceMethodsWithoutGeneratedCodeAttribute">Includes methods that aren't decorated with `GeneratedCode("grpc_csharp_plugin")` when parsing gRPC services.</param>
|
||||
[Command("il2cpp")]
|
||||
public void Il2Cpp(
|
||||
[Argument] string gameAssembly,
|
||||
[Argument] string globalMetadata,
|
||||
[Argument] string unityVersion,
|
||||
[Argument] string outPath,
|
||||
bool skipEnums,
|
||||
bool includePropertiesWithoutNonUserCodeAttribute,
|
||||
bool includeServiceMethodsWithoutGeneratedCodeAttribute,
|
||||
bool parseServiceServers,
|
||||
bool parseServiceClients,
|
||||
LogLevel logLevel = LogLevel.Information)
|
||||
{
|
||||
if (!UnityVersion.TryParse(unityVersion, out UnityVersion unityVer, out _))
|
||||
{
|
||||
unityVer = unityVersion.EndsWith("globalgamemanagers")
|
||||
? LibCpp2IlMain.GetVersionFromGlobalGameManagers(
|
||||
File.ReadAllBytes(unityVersion))
|
||||
: LibCpp2IlMain.GetVersionFromDataUnity3D(
|
||||
File.OpenRead(unityVersion));
|
||||
}
|
||||
|
||||
using ILoggerFactory loggerFactory = CreateLoggerFactory(logLevel);
|
||||
ILogger logger = CreateProtodecLogger(loggerFactory);
|
||||
|
||||
logger.LogInformation("Loading target assemblies...");
|
||||
Il2CppAssemblyLoader loader = new(gameAssembly, globalMetadata, unityVer, loggerFactory);
|
||||
|
||||
Handle(
|
||||
loader,
|
||||
outPath,
|
||||
skipEnums,
|
||||
includePropertiesWithoutNonUserCodeAttribute,
|
||||
includeServiceMethodsWithoutGeneratedCodeAttribute,
|
||||
parseServiceServers,
|
||||
parseServiceClients,
|
||||
loggerFactory,
|
||||
logger);
|
||||
}
|
||||
|
||||
private static void Handle(
|
||||
CilAssemblyLoader loader,
|
||||
string outPath,
|
||||
bool skipEnums,
|
||||
bool includePropertiesWithoutNonUserCodeAttribute,
|
||||
bool includeServiceMethodsWithoutGeneratedCodeAttribute,
|
||||
bool parseServiceServers,
|
||||
bool parseServiceClients,
|
||||
ILoggerFactory loggerFactory,
|
||||
ILogger logger)
|
||||
{
|
||||
ParserOptions options = ParserOptions.None;
|
||||
if (skipEnums)
|
||||
|
|
@ -50,18 +134,6 @@ internal sealed class Commands
|
|||
if (includeServiceMethodsWithoutGeneratedCodeAttribute)
|
||||
options |= ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute;
|
||||
|
||||
using ILoggerFactory loggerFactory = LoggerFactory.Create(
|
||||
builder => builder.AddSimpleConsole(static console => console.IncludeScopes = true)
|
||||
.SetMinimumLevel(logLevel));
|
||||
|
||||
ILogger logger = loggerFactory.CreateLogger("protodec");
|
||||
ConsoleApp.LogError = msg => logger.LogError(msg);
|
||||
|
||||
logger.LogInformation("Loading target assemblies...");
|
||||
using CilAssemblyLoader loader = new ClrAssemblyLoader(
|
||||
targetPath,
|
||||
loggerFactory.CreateLogger<ClrAssemblyLoader>());
|
||||
|
||||
ProtodecContext ctx = new()
|
||||
{
|
||||
Logger = loggerFactory.CreateLogger<ProtodecContext>()
|
||||
|
|
@ -125,4 +197,17 @@ internal sealed class Commands
|
|||
ctx.WriteAllTo(indentWriter);
|
||||
}
|
||||
}
|
||||
|
||||
private static ILoggerFactory CreateLoggerFactory(LogLevel logLevel) =>
|
||||
LoggerFactory.Create(
|
||||
builder => builder.AddSimpleConsole(static console => console.IncludeScopes = true)
|
||||
.SetMinimumLevel(logLevel));
|
||||
|
||||
private static ILogger CreateProtodecLogger(ILoggerFactory loggerFactory)
|
||||
{
|
||||
ILogger logger = loggerFactory.CreateLogger("protodec");
|
||||
ConsoleApp.LogError = msg => logger.LogError(msg);
|
||||
|
||||
return logger;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue