chizui/Il2CppInspectorRedux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

APK: Add multi-architecture (multiple binaries) support

Browse Source
This commit is contained in:
Katy Coe
2020-08-07 19:09:25 +02:00
parent 32497364e5
commit 9ee316e8b2
2 changed files with 97 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
Il2CppInspector.Common/FileFormatReaders/APKReader.cs Normal file
View File

@@ -0,0 +1,74 @@
/*
Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
All rights reserved.
*/
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
namespace Il2CppInspector
{
// This is a wrapper for multiple binary files of different architectures within a single APK
internal class APKReader : FileFormatReader<APKReader>
{
private ZipArchive zip;
private ZipArchiveEntry[] binaryFiles;
public APKReader(Stream stream) : base(stream) { }
protected override bool Init() {
// Check if it's a zip file first because ZipFile.OpenRead is extremely slow if it isn't
if (ReadUInt32() != 0x04034B50)
return false;
try {
zip = new ZipArchive(BaseStream);
// Check for existence of global-metadata.dat
if (!zip.Entries.Any(f => f.FullName == "assets/bin/Data/Managed/Metadata/global-metadata.dat"))
return false;
// Get list of binary files
binaryFiles = zip.Entries.Where(f => f.FullName.StartsWith("lib/") && f.Name == "libil2cpp.so").ToArray();
// This package doesn't contain an IL2CPP application
if (!binaryFiles.Any())
return false;
}
// Not an archive
catch (InvalidDataException) {
return false;
}
NumImages = (uint) binaryFiles.Count();
return true;
}
public override IFileFormatReader this[uint index] {
get {
Console.WriteLine($"Extracting binary from {binaryFiles[index].FullName}");
IFileFormatReader loaded = null;
// ZipArchiveEntry does not support seeking so we have to close and re-open for each possible load format
var binary = binaryFiles[index].Open();
loaded = ElfReader32.Load(binary, OnStatusUpdate);
binary.Close();
if (loaded != null)
return loaded;
binary = binaryFiles[index].Open();
loaded = ElfReader64.Load(binary, OnStatusUpdate);
binary.Close();
return loaded;
}
}
}
}

35
Il2CppInspector.Common/IL2CPP/Il2CppInspector.cs
View File

@@ -1,5 +1,5 @@
/*
Copyright 2017-2020 Katy Coe - http://www.hearthcode.org - http://www.djkaty.com
Copyright 2017-2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
All rights reserved.
*/
@@ -315,7 +315,7 @@ namespace Il2CppInspector
// Check for Android APK
var metadataFile = zip.Entries.FirstOrDefault(f => f.FullName == "assets/bin/Data/Managed/Metadata/global-metadata.dat");
var binaryFile = zip.Entries.FirstOrDefault(f => f.FullName.StartsWith("lib/") && f.Name == "libil2cpp.so");
var binaryFiles = zip.Entries.Where(f => f.FullName.StartsWith("lib/") && f.Name == "libil2cpp.so");
// Check for iOS IPA
var ipaBinaryFolder = zip.Entries.FirstOrDefault(f => f.FullName.StartsWith("Payload/") && f.FullName.EndsWith(".app/") && f.FullName.Count(x => x == '/') == 2);
@@ -323,30 +323,41 @@ namespace Il2CppInspector
if (ipaBinaryFolder != null) {
var ipaBinaryName = ipaBinaryFolder.FullName[8..^5];
metadataFile = zip.Entries.FirstOrDefault(f => f.FullName == $"Payload/{ipaBinaryName}.app/Data/Managed/Metadata/global-metadata.dat");
binaryFile = zip.Entries.FirstOrDefault(f => f.FullName == $"Payload/{ipaBinaryName}.app/{ipaBinaryName}");
binaryFiles = zip.Entries.Where(f => f.FullName == $"Payload/{ipaBinaryName}.app/{ipaBinaryName}");
}
// This package doesn't contain an IL2CPP application
if (metadataFile == null || binaryFile == null) {
if (metadataFile == null || !binaryFiles.Any()) {
Console.WriteLine($"Package {packageFile} does not contain an IL2CPP application");
return null;
}
// Extract the files to memory
// Extract the metadata file to memory
Console.WriteLine($"Extracting metadata from {packageFile}{Path.DirectorySeparatorChar}{metadataFile.FullName}");
Console.WriteLine($"Extracting binary from {packageFile}{Path.DirectorySeparatorChar}{binaryFile.FullName}");
var binaryMemoryStream = new MemoryStream();
var metadataMemoryStream = new MemoryStream();
metadataStream = metadataFile.Open();
binaryStream = binaryFile.Open();
binaryStream.CopyTo(binaryMemoryStream);
metadataStream.CopyTo(metadataMemoryStream);
binaryMemoryStream.Position = 0;
metadataMemoryStream.Position = 0;
// Extract the binary file or package to memory
var binaryMemoryStream = new MemoryStream();
// IPAs will only have one binary (which may or may not be a UB covering multiple architectures)
if (ipaBinaryFolder != null) {
Console.WriteLine($"Extracting binary from {packageFile}{Path.DirectorySeparatorChar}{binaryFiles.First().FullName}");
binaryStream = binaryFiles.First().Open();
binaryStream.CopyTo(binaryMemoryStream);
binaryMemoryStream.Position = 0;
}
// APKs may have one or more binaries, one per architecture
// We'll read the entire APK and load those via APKReader
else {
binaryMemoryStream = new MemoryStream(File.ReadAllBytes(packageFile));
}
return (metadataMemoryStream, binaryMemoryStream);
}