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Support XAPKs and ZIPs containing APKs

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This commit is contained in:
Katy Coe
2020-12-08 18:57:48 +01:00
parent c3f59120df
commit 21fa006085
3 changed files with 45 additions and 23 deletions
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62
Il2CppInspector.Common/IL2CPP/Il2CppInspector.cs
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@@ -383,15 +383,8 @@ namespace Il2CppInspector
#region Loaders
// Finds and extracts the metadata and IL2CPP binary from one or more APK files, or one AAB or IPA file into MemoryStreams
// Returns null if package not recognized or does not contain an IL2CPP application
public static (MemoryStream Metadata, MemoryStream Binary)? GetStreamsFromPackage(IEnumerable<string> packageFiles, bool silent = false) {
public static (MemoryStream Metadata, MemoryStream Binary)? GetStreamsFromPackage(IEnumerable<ZipArchive> zipStreams, bool silent = false) {
try {
// Check every item is a zip file first because ZipFile.OpenRead is extremely slow if it isn't
foreach (var file in packageFiles)
using (BinaryReader zipTest = new BinaryReader(File.Open(file, FileMode.Open))) {
if (zipTest.ReadUInt32() != 0x04034B50)
return null;
}
MemoryStream metadataMemoryStream = null, binaryMemoryStream = null;
ZipArchiveEntry androidAAB = null;
ZipArchiveEntry ipaBinaryFolder = null;
@@ -405,9 +398,9 @@ namespace Il2CppInspector
// (we return the entire APK or AAB to be loaded by APKReader or AABReader)
// - Multiple APK files, one of which contains global-metadadata.dat and the others contain one binary each
// (we return all of the binaries re-packed in memory to a new Zip file, to be loaded by APKReader)
foreach (var file in packageFiles) {
// We can't close the files because we might have to read from them after the foreach
var zip = ZipFile.OpenRead(file);
// We can't close the files because we might have to read from them after the foreach
foreach (var zip in zipStreams) {
// Check for Android APK (split APKs will only fill one of these two variables)
var metadataFile = zip.Entries.FirstOrDefault(f => f.FullName == "assets/bin/Data/Managed/Metadata/global-metadata.dat");
@@ -434,7 +427,7 @@ namespace Il2CppInspector
if (metadataFile != null) {
// Extract the metadata file to memory
if (!silent)
Console.WriteLine($"Extracting metadata from {file}{Path.DirectorySeparatorChar}{metadataFile.FullName}");
Console.WriteLine($"Extracting metadata from (archive){Path.DirectorySeparatorChar}{metadataFile.FullName}");
metadataMemoryStream = new MemoryStream();
using var metadataStream = metadataFile.Open();
@@ -452,7 +445,7 @@ namespace Il2CppInspector
// IPAs will only have one binary (which may or may not be a UB covering multiple architectures)
if (ipaBinaryFolder != null) {
if (!silent)
Console.WriteLine($"Extracting binary from {packageFiles.First()}{Path.DirectorySeparatorChar}{binaryFiles.First().FullName}");
Console.WriteLine($"Extracting binary from {zipStreams.First()}{Path.DirectorySeparatorChar}{binaryFiles.First().FullName}");
// Extract the binary file or package to memory
binaryMemoryStream = new MemoryStream();
@@ -462,13 +455,8 @@ namespace Il2CppInspector
}
// AABs or single APKs may have one or more binaries, one per architecture
// We'll read the entire AAB/APK and load those via AABReader/APKReader
else if (packageFiles.Count() == 1) {
binaryMemoryStream = new MemoryStream(File.ReadAllBytes(packageFiles.First()));
}
// Split APKs will have one binary per APK
// Roll them up into a new in-memory zip file and load it via APKReader
// Roll them up into a new in-memory zip file and load it via AABReader/APKReader
else {
binaryMemoryStream = new MemoryStream();
using (var apkArchive = new ZipArchive(binaryMemoryStream, ZipArchiveMode.Create, true)) {
@@ -485,13 +473,47 @@ namespace Il2CppInspector
return (metadataMemoryStream, binaryMemoryStream);
}
// Not an archive
catch (InvalidDataException) {
return null;
}
}
public static (MemoryStream Metadata, MemoryStream Binary)? GetStreamsFromPackage(IEnumerable<string> packageFiles, bool silent = false) {
// Check every item is a zip file first because ZipFile.OpenRead is extremely slow if it isn't
foreach (var file in packageFiles)
using (BinaryReader zipTest = new BinaryReader(File.Open(file, FileMode.Open))) {
if (zipTest.ReadUInt32() != 0x04034B50)
return null;
}
// Check for an XAPK/Zip-style file
if (packageFiles.Count() == 1) {
try {
var xapk = ZipFile.OpenRead(packageFiles.First());
var apks = xapk.Entries.Where(f => f.FullName.EndsWith(".apk"));
// An XAPK/Zip file containing one or more APKs. Extract them
if (apks.Any()) {
var apkFiles = new List<MemoryStream>();
foreach (var apk in apks) {
var bytes = new MemoryStream();
using var apkStream = apk.Open();
apkStream.CopyTo(bytes);
apkFiles.Add(bytes);
}
return GetStreamsFromPackage(apkFiles.Select(f => new ZipArchive(f, ZipArchiveMode.Read)));
}
}
// Not an archive
catch (InvalidDataException) {
return null;
}
}
return GetStreamsFromPackage(packageFiles.Select(f => ZipFile.OpenRead(f)), silent);
}
// Load from an AAB, IPA or one or more APK files
public static List<Il2CppInspector> LoadFromPackage(IEnumerable<string> packageFiles, bool silent = false) {
var streams = GetStreamsFromPackage(packageFiles, silent);