mirror of
https://github.com/Dongyifengs/AssetStudio-Genshin-MoYi.git
synced 2025-04-20 11:39:20 +08:00
421 lines
17 KiB
C#
421 lines
17 KiB
C#
using K4os.Compression.LZ4;
|
|
using System;
|
|
using System.IO;
|
|
using System.Linq;
|
|
|
|
namespace AssetStudio
|
|
{
|
|
[Flags]
|
|
public enum ArchiveFlags
|
|
{
|
|
CompressionTypeMask = 0x3f,
|
|
BlocksAndDirectoryInfoCombined = 0x40,
|
|
BlocksInfoAtTheEnd = 0x80,
|
|
OldWebPluginCompatibility = 0x100,
|
|
BlockInfoNeedPaddingAtStart = 0x200
|
|
}
|
|
|
|
[Flags]
|
|
public enum StorageBlockFlags
|
|
{
|
|
CompressionTypeMask = 0x3f,
|
|
Streamed = 0x40
|
|
}
|
|
|
|
public enum CompressionType
|
|
{
|
|
None,
|
|
Lzma,
|
|
Lz4,
|
|
Lz4HC,
|
|
Lzham,
|
|
Lz4Mr0k
|
|
}
|
|
public class BundleFile
|
|
{
|
|
public class Header
|
|
{
|
|
public string signature;
|
|
public uint version;
|
|
public string unityVersion;
|
|
public string unityRevision;
|
|
public long size;
|
|
public uint compressedBlocksInfoSize;
|
|
public uint uncompressedBlocksInfoSize;
|
|
public ArchiveFlags flags;
|
|
}
|
|
|
|
public class StorageBlock
|
|
{
|
|
public uint compressedSize;
|
|
public uint uncompressedSize;
|
|
public StorageBlockFlags flags;
|
|
}
|
|
|
|
public class Node
|
|
{
|
|
public long offset;
|
|
public long size;
|
|
public uint flags;
|
|
public string path;
|
|
}
|
|
|
|
public Header m_Header;
|
|
private StorageBlock[] m_BlocksInfo;
|
|
private Node[] m_DirectoryInfo;
|
|
|
|
public StreamFile[] FileList;
|
|
|
|
public BundleFile(FileReader reader)
|
|
{
|
|
m_Header = new Header();
|
|
m_Header.signature = reader.ReadStringToNull();
|
|
|
|
if (reader.Game.Name == "BH3")
|
|
{
|
|
m_Header.version = 6;
|
|
m_Header.unityVersion = "5.x.x";
|
|
m_Header.unityRevision = "2017.4.18f1";
|
|
}
|
|
else if (reader.Game.Name == "SR_CB2" || reader.Game.Name == "SR_CB3")
|
|
{
|
|
var readHeader = m_Header.signature != "ENCR";
|
|
|
|
if (!readHeader)
|
|
{
|
|
m_Header.version = 7;
|
|
m_Header.unityVersion = "5.x.x";
|
|
m_Header.unityRevision = "2019.4.32f1";
|
|
}
|
|
else
|
|
{
|
|
m_Header.version = reader.ReadUInt32();
|
|
m_Header.unityVersion = reader.ReadStringToNull();
|
|
m_Header.unityRevision = reader.ReadStringToNull();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_Header.version = reader.ReadUInt32();
|
|
m_Header.unityVersion = reader.ReadStringToNull();
|
|
m_Header.unityRevision = reader.ReadStringToNull();
|
|
}
|
|
switch (m_Header.signature)
|
|
{
|
|
case "UnityArchive":
|
|
break; //TODO
|
|
case "UnityWeb":
|
|
case "UnityRaw":
|
|
if (m_Header.version == 6)
|
|
{
|
|
goto case "UnityFS";
|
|
}
|
|
ReadHeaderAndBlocksInfo(reader);
|
|
using (var blocksStream = CreateBlocksStream(reader.FullPath))
|
|
{
|
|
ReadBlocksAndDirectory(reader, blocksStream);
|
|
ReadFiles(blocksStream, reader.FullPath);
|
|
}
|
|
break;
|
|
case "UnityFS":
|
|
case "ENCR":
|
|
ReadHeader(reader);
|
|
if (reader.Game.Name == "ZZZ_CB1")
|
|
{
|
|
reader.AlignStream(0x10);
|
|
}
|
|
ReadBlocksInfoAndDirectory(reader);
|
|
using (var blocksStream = CreateBlocksStream(reader.FullPath))
|
|
{
|
|
ReadBlocks(reader, blocksStream);
|
|
ReadFiles(blocksStream, reader.FullPath);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
private void ReadHeaderAndBlocksInfo(EndianBinaryReader reader)
|
|
{
|
|
if (m_Header.version >= 4)
|
|
{
|
|
var hash = reader.ReadBytes(16);
|
|
var crc = reader.ReadUInt32();
|
|
}
|
|
var minimumStreamedBytes = reader.ReadUInt32();
|
|
m_Header.size = reader.ReadUInt32();
|
|
var numberOfLevelsToDownloadBeforeStreaming = reader.ReadUInt32();
|
|
var levelCount = reader.ReadInt32();
|
|
m_BlocksInfo = new StorageBlock[1];
|
|
for (int i = 0; i < levelCount; i++)
|
|
{
|
|
var storageBlock = new StorageBlock()
|
|
{
|
|
compressedSize = reader.ReadUInt32(),
|
|
uncompressedSize = reader.ReadUInt32(),
|
|
};
|
|
if (i == levelCount - 1)
|
|
{
|
|
m_BlocksInfo[0] = storageBlock;
|
|
}
|
|
}
|
|
if (m_Header.version >= 2)
|
|
{
|
|
var completeFileSize = reader.ReadUInt32();
|
|
}
|
|
if (m_Header.version >= 3)
|
|
{
|
|
var fileInfoHeaderSize = reader.ReadUInt32();
|
|
}
|
|
reader.Position = m_Header.size;
|
|
}
|
|
|
|
private Stream CreateBlocksStream(string path)
|
|
{
|
|
Stream blocksStream;
|
|
var uncompressedSizeSum = m_BlocksInfo.Sum(x => x.uncompressedSize);
|
|
if (uncompressedSizeSum >= int.MaxValue)
|
|
{
|
|
/*var memoryMappedFile = MemoryMappedFile.CreateNew(null, uncompressedSizeSum);
|
|
assetsDataStream = memoryMappedFile.CreateViewStream();*/
|
|
blocksStream = new FileStream(path + ".temp", FileMode.Create, FileAccess.ReadWrite, FileShare.None, 4096, FileOptions.DeleteOnClose);
|
|
}
|
|
else
|
|
{
|
|
blocksStream = new MemoryStream((int)uncompressedSizeSum);
|
|
}
|
|
return blocksStream;
|
|
}
|
|
|
|
private void ReadBlocksAndDirectory(EndianBinaryReader reader, Stream blocksStream)
|
|
{
|
|
var isCompressed = m_Header.signature == "UnityWeb";
|
|
foreach (var blockInfo in m_BlocksInfo)
|
|
{
|
|
var uncompressedBytes = reader.ReadBytes((int)blockInfo.compressedSize);
|
|
if (isCompressed)
|
|
{
|
|
using (var memoryStream = new MemoryStream(uncompressedBytes))
|
|
{
|
|
using (var decompressStream = SevenZipHelper.StreamDecompress(memoryStream))
|
|
{
|
|
uncompressedBytes = decompressStream.ToArray();
|
|
}
|
|
}
|
|
}
|
|
blocksStream.Write(uncompressedBytes, 0, uncompressedBytes.Length);
|
|
}
|
|
blocksStream.Position = 0;
|
|
var blocksReader = new EndianBinaryReader(blocksStream);
|
|
var nodesCount = blocksReader.ReadInt32();
|
|
m_DirectoryInfo = new Node[nodesCount];
|
|
for (int i = 0; i < nodesCount; i++)
|
|
{
|
|
m_DirectoryInfo[i] = new Node
|
|
{
|
|
path = blocksReader.ReadStringToNull(),
|
|
offset = blocksReader.ReadUInt32(),
|
|
size = blocksReader.ReadUInt32()
|
|
};
|
|
}
|
|
}
|
|
|
|
public void ReadFiles(Stream blocksStream, string path)
|
|
{
|
|
FileList = new StreamFile[m_DirectoryInfo.Length];
|
|
for (int i = 0; i < m_DirectoryInfo.Length; i++)
|
|
{
|
|
var node = m_DirectoryInfo[i];
|
|
var file = new StreamFile();
|
|
FileList[i] = file;
|
|
file.path = node.path;
|
|
file.fileName = Path.GetFileName(node.path);
|
|
if (node.size >= int.MaxValue)
|
|
{
|
|
/*var memoryMappedFile = MemoryMappedFile.CreateNew(null, entryinfo_size);
|
|
file.stream = memoryMappedFile.CreateViewStream();*/
|
|
var extractPath = path + "_unpacked" + Path.DirectorySeparatorChar;
|
|
Directory.CreateDirectory(extractPath);
|
|
file.stream = new FileStream(extractPath + file.fileName, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite);
|
|
}
|
|
else
|
|
{
|
|
file.stream = new MemoryStream((int)node.size);
|
|
}
|
|
blocksStream.Position = node.offset;
|
|
blocksStream.CopyTo(file.stream, node.size);
|
|
file.stream.Position = 0;
|
|
}
|
|
}
|
|
|
|
private void DecryptHeader(int key)
|
|
{
|
|
var rand = new XORShift128();
|
|
rand.InitSeed(key);
|
|
m_Header.flags ^= (ArchiveFlags)rand.NextDecryptInt();
|
|
m_Header.size ^= rand.NextDecryptLong();
|
|
m_Header.uncompressedBlocksInfoSize ^= rand.NextDecryptUInt();
|
|
m_Header.compressedBlocksInfoSize ^= rand.NextDecryptUInt();
|
|
}
|
|
|
|
private void ReadHeader(EndianBinaryReader reader)
|
|
{
|
|
if (reader.Game.Name == "BH3")
|
|
{
|
|
var key = reader.ReadInt32();
|
|
m_Header.flags = (ArchiveFlags)reader.ReadUInt32();
|
|
m_Header.size = reader.ReadInt64();
|
|
m_Header.uncompressedBlocksInfoSize = reader.ReadUInt32();
|
|
m_Header.compressedBlocksInfoSize = reader.ReadUInt32();
|
|
DecryptHeader(key);
|
|
var encUnityVersion = reader.ReadStringToNull();
|
|
var encUnityRevision = reader.ReadStringToNull();
|
|
}
|
|
else
|
|
{
|
|
m_Header.size = reader.ReadInt64();
|
|
m_Header.compressedBlocksInfoSize = reader.ReadUInt32();
|
|
m_Header.uncompressedBlocksInfoSize = reader.ReadUInt32();
|
|
m_Header.flags = (ArchiveFlags)reader.ReadUInt32();
|
|
}
|
|
}
|
|
|
|
private void ReadBlocksInfoAndDirectory(EndianBinaryReader reader)
|
|
{
|
|
byte[] blocksInfoBytes;
|
|
if (m_Header.version >= 7 && reader.Game.Name != "SR_CB2" && reader.Game.Name != "SR_CB3")
|
|
{
|
|
reader.AlignStream(16);
|
|
}
|
|
if ((m_Header.flags & ArchiveFlags.BlocksInfoAtTheEnd) != 0) //kArchiveBlocksInfoAtTheEnd
|
|
{
|
|
var position = reader.Position;
|
|
reader.Position = reader.BaseStream.Length - m_Header.compressedBlocksInfoSize;
|
|
blocksInfoBytes = reader.ReadBytes((int)m_Header.compressedBlocksInfoSize);
|
|
reader.Position = position;
|
|
}
|
|
else //0x40 BlocksAndDirectoryInfoCombined
|
|
{
|
|
blocksInfoBytes = reader.ReadBytes((int)m_Header.compressedBlocksInfoSize);
|
|
}
|
|
MemoryStream blocksInfoUncompresseddStream;
|
|
var uncompressedSize = m_Header.uncompressedBlocksInfoSize;
|
|
var compressionType = (CompressionType)(m_Header.flags & ArchiveFlags.CompressionTypeMask);
|
|
switch (compressionType) //kArchiveCompressionTypeMask
|
|
{
|
|
case CompressionType.None: //None
|
|
{
|
|
blocksInfoUncompresseddStream = new MemoryStream(blocksInfoBytes);
|
|
break;
|
|
}
|
|
case CompressionType.Lzma: //LZMA
|
|
{
|
|
blocksInfoUncompresseddStream = new MemoryStream((int)(uncompressedSize));
|
|
using (var blocksInfoCompressedStream = new MemoryStream(blocksInfoBytes))
|
|
{
|
|
SevenZipHelper.StreamDecompress(blocksInfoCompressedStream, blocksInfoUncompresseddStream, m_Header.compressedBlocksInfoSize, m_Header.uncompressedBlocksInfoSize);
|
|
}
|
|
blocksInfoUncompresseddStream.Position = 0;
|
|
break;
|
|
}
|
|
case CompressionType.Lz4: //LZ4
|
|
case CompressionType.Lz4HC: //LZ4HC
|
|
{
|
|
var uncompressedBytes = new byte[uncompressedSize];
|
|
var numWrite = LZ4Codec.Decode(blocksInfoBytes, uncompressedBytes);
|
|
if (numWrite != uncompressedSize)
|
|
{
|
|
throw new IOException($"Lz4 decompression error, write {numWrite} bytes but expected {uncompressedSize} bytes");
|
|
}
|
|
blocksInfoUncompresseddStream = new MemoryStream(uncompressedBytes);
|
|
break;
|
|
}
|
|
case CompressionType.Lz4Mr0k: //Lz4Mr0k
|
|
var blocksInfoSize = blocksInfoBytes.Length;
|
|
if (Mr0k.IsMr0k(blocksInfoBytes))
|
|
{
|
|
Mr0k.Decrypt(ref blocksInfoBytes, ref blocksInfoSize);
|
|
}
|
|
goto case CompressionType.Lz4HC;
|
|
default:
|
|
throw new IOException($"Unsupported compression type {compressionType}");
|
|
}
|
|
using (var blocksInfoReader = new EndianBinaryReader(blocksInfoUncompresseddStream))
|
|
{
|
|
if ((reader.Game.Name != "SR_CB2" && reader.Game.Name != "SR_CB3") || m_Header.signature != "ENCR")
|
|
{
|
|
var uncompressedDataHash = blocksInfoReader.ReadBytes(16);
|
|
}
|
|
var blocksInfoCount = blocksInfoReader.ReadInt32();
|
|
m_BlocksInfo = new StorageBlock[blocksInfoCount];
|
|
for (int i = 0; i < blocksInfoCount; i++)
|
|
{
|
|
m_BlocksInfo[i] = new StorageBlock
|
|
{
|
|
uncompressedSize = blocksInfoReader.ReadUInt32(),
|
|
compressedSize = blocksInfoReader.ReadUInt32(),
|
|
flags = (StorageBlockFlags)blocksInfoReader.ReadUInt16()
|
|
};
|
|
}
|
|
|
|
var nodesCount = blocksInfoReader.ReadInt32();
|
|
m_DirectoryInfo = new Node[nodesCount];
|
|
for (int i = 0; i < nodesCount; i++)
|
|
{
|
|
m_DirectoryInfo[i] = new Node
|
|
{
|
|
offset = blocksInfoReader.ReadInt64(),
|
|
size = blocksInfoReader.ReadInt64(),
|
|
flags = blocksInfoReader.ReadUInt32(),
|
|
path = blocksInfoReader.ReadStringToNull(),
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ReadBlocks(EndianBinaryReader reader, Stream blocksStream)
|
|
{
|
|
foreach (var blockInfo in m_BlocksInfo)
|
|
{
|
|
var compressionType = (CompressionType)(blockInfo.flags & StorageBlockFlags.CompressionTypeMask);
|
|
switch (compressionType) //kStorageBlockCompressionTypeMask
|
|
{
|
|
case CompressionType.None: //None
|
|
{
|
|
reader.BaseStream.CopyTo(blocksStream, blockInfo.compressedSize);
|
|
break;
|
|
}
|
|
case CompressionType.Lzma: //LZMA
|
|
{
|
|
SevenZipHelper.StreamDecompress(reader.BaseStream, blocksStream, blockInfo.compressedSize, blockInfo.uncompressedSize);
|
|
break;
|
|
}
|
|
case CompressionType.Lz4: //LZ4
|
|
case CompressionType.Lz4HC: //LZ4HC
|
|
case CompressionType.Lz4Mr0k: //Lz4Mr0k
|
|
{
|
|
var compressedSize = (int)blockInfo.compressedSize;
|
|
var compressedBytes = new byte[compressedSize];
|
|
reader.Read(compressedBytes, 0, compressedSize);
|
|
if (compressionType == CompressionType.Lz4Mr0k && Mr0k.IsMr0k(compressedBytes))
|
|
{
|
|
Mr0k.Decrypt(ref compressedBytes, ref compressedSize);
|
|
}
|
|
var uncompressedSize = (int)blockInfo.uncompressedSize;
|
|
var uncompressedBytes = new byte[uncompressedSize];
|
|
var numWrite = LZ4Codec.Decode(compressedBytes, 0, compressedSize, uncompressedBytes, 0, uncompressedSize);
|
|
if (numWrite != uncompressedSize)
|
|
{
|
|
throw new IOException($"Lz4 decompression error, write {numWrite} bytes but expected {uncompressedSize} bytes");
|
|
}
|
|
blocksStream.Write(uncompressedBytes, 0, uncompressedSize);
|
|
break;
|
|
}
|
|
default:
|
|
throw new IOException($"Unsupported compression type {compressionType}");
|
|
}
|
|
}
|
|
blocksStream.Position = 0;
|
|
}
|
|
}
|
|
}
|