76 lines
2.4 KiB
C#
76 lines
2.4 KiB
C#
/*
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Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
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All rights reserved.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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namespace Il2CppInspector
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{
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// This is a wrapper for multiple binary files of different architectures within a single APK
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internal class APKReader : FileFormatReader<APKReader>
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{
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private ZipArchive zip;
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private ZipArchiveEntry[] binaryFiles;
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public APKReader(Stream stream) : base(stream) { }
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public override string DefaultFilename => "Package.apk";
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protected override bool Init() {
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// Check if it's a zip file first because ZipFile.OpenRead is extremely slow if it isn't
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// 0x04034B50 = magic file header
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// 0x02014B50 = central directory file header (will appear if we merged a split APK in memory)
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var magic = ReadUInt32();
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if (magic != 0x04034B50 && magic != 0x02014B50)
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return false;
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try {
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zip = new ZipArchive(BaseStream);
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// Get list of binary files
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binaryFiles = zip.Entries.Where(f => f.FullName.StartsWith("lib/") && f.Name == "libil2cpp.so").ToArray();
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// This package doesn't contain an IL2CPP binary
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if (!binaryFiles.Any())
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return false;
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}
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// Not an archive
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catch (InvalidDataException) {
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return false;
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}
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NumImages = (uint) binaryFiles.Count();
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return true;
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}
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public override IFileFormatReader this[uint index] {
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get {
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Console.WriteLine($"Extracting binary from {binaryFiles[index].FullName}");
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IFileFormatReader loaded = null;
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// ZipArchiveEntry does not support seeking so we have to close and re-open for each possible load format
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var binary = binaryFiles[index].Open();
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loaded = ElfReader32.Load(binary, OnStatusUpdate);
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binary.Close();
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if (loaded != null)
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return loaded;
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binary = binaryFiles[index].Open();
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loaded = ElfReader64.Load(binary, OnStatusUpdate);
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binary.Close();
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return loaded;
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}
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}
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}
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}
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