public void ReadIndex(byte[] key, PakFilter filter = null)
{
ReadIndexInternal(key, filter, out var exc);
if (exc != null)
{
throw exc;
}
}
public PakIndex(bool cacheFiles, bool caseSensitive = true, PakFilter filter = null)
{
CacheFiles = cacheFiles;
CaseSensitive = caseSensitive;
Filter = filter;
if (CacheFiles)
{
CachedFiles = new Dictionary <string, ArraySegment <byte> >();
}
}
public PakIndex(IEnumerable <Stream> streams, bool cacheFiles, bool caseSensitive = true, PakFilter filter = null)
{
CacheFiles = cacheFiles;
CaseSensitive = caseSensitive;
Filter = filter;
if (CacheFiles)
{
CachedFiles = new Dictionary <string, ArraySegment <byte> >();
}
foreach (var stream in streams)
{
PakFiles.Add(new PakFileReader(string.Empty, stream, caseSensitive));
}
}
void ReadIndexInternal(byte[] key, PakFilter filter, out Exception exc)
{
if (Initialized)
{
exc = new InvalidOperationException("Index is already initialized");
return;
}
if (Info.bEncryptedIndex && key == null)
{
exc = new ArgumentException("Index is encrypted but no key was provided", nameof(key));
return;
}
Stream.Position = Info.IndexOffset;
BinaryReader IndexReader;
if (Info.bEncryptedIndex)
{
IndexReader = new BinaryReader(new MemoryStream(AESDecryptor.DecryptAES(Reader.ReadBytes((int)Info.IndexSize), key)));
int stringLen = IndexReader.ReadInt32();
if (stringLen > 512 || stringLen < -512)
{
exc = new ArgumentException("The provided key is invalid", nameof(key));
return;
}
if (stringLen < 0)
{
IndexReader.BaseStream.Position += (stringLen - 1) * 2;
if (IndexReader.ReadUInt16() != 0)
{
exc = new ArgumentException("The provided key is invalid", nameof(key));
return;
}
}
else
{
IndexReader.BaseStream.Position += stringLen - 1;
if (IndexReader.ReadByte() != 0)
{
exc = new ArgumentException("The provided key is invalid", nameof(key));
return;
}
}
IndexReader.BaseStream.Position = 0;
}
else
{
IndexReader = Reader;
}
Dictionary <string, FPakEntry> tempFiles;
if (Info.Version >= EPakVersion.PATH_HASH_INDEX)
{
ReadIndexUpdated(IndexReader, key, out tempFiles, filter);
}
else
{
// https://github.com/EpicGames/UnrealEngine/blob/bf95c2cbc703123e08ab54e3ceccdd47e48d224a/Engine/Source/Runtime/PakFile/Private/IPlatformFilePak.cpp#L4509
MountPoint = IndexReader.ReadFString() ?? "";
if (MountPoint.StartsWith("../../.."))
{
MountPoint = MountPoint[8..];
public bool TryReadIndex(byte[] key, PakFilter filter = null)
{
ReadIndexInternal(key, filter, out var exc);
return(exc == null);
}
public PakIndex(string path, bool cacheFiles, bool caseSensitive = true, PakFilter filter = null) : this(Directory.EnumerateFiles(path, "*.pak"), cacheFiles, caseSensitive, filter)
{
}