private IReadOnlyDictionary <string, GameFile> ReadIndexLegacy(bool caseInsensitive)
{
Ar.Position = Info.IndexOffset;
var index = new FByteArchive($"{Name} - Index", ReadAndDecrypt((int)Info.IndexSize));
string mountPoint;
try
{
mountPoint = index.ReadFString();
}
catch (Exception e)
{
throw new InvalidAesKeyException($"Given aes key '{AesKey?.KeyString}'is not working with '{Name}'", e);
}
ValidateMountPoint(ref mountPoint);
MountPoint = mountPoint;
var fileCount = index.Read <int>();
var files = new Dictionary <string, GameFile>(fileCount);
for (var i = 0; i < fileCount; i++)
{
var path = string.Concat(mountPoint, index.ReadFString());
var entry = new FPakEntry(this, path, index);
if (entry.IsDeleted && entry.Size == 0)
{
continue;
}
if (entry.IsEncrypted)
{
EncryptedFileCount++;
}
if (caseInsensitive)
{
files[path.ToLowerInvariant()] = entry;
}
else
{
files[path] = entry;
}
}
return(Files = files);
}
private IReadOnlyDictionary <string, GameFile> ReadIndexUpdated(bool caseInsensitive)
{
// Prepare primary index and decrypt if necessary
Ar.Position = Info.IndexOffset;
FArchive primaryIndex = new FByteArchive($"{Name} - Primary Index", ReadAndDecrypt((int)Info.IndexSize));
string mountPoint;
try
{
mountPoint = primaryIndex.ReadFString();
}
catch (Exception e)
{
throw new InvalidAesKeyException($"Given aes key '{AesKey?.KeyString}'is not working with '{Name}'", e);
}
ValidateMountPoint(ref mountPoint);
MountPoint = mountPoint;
var fileCount = primaryIndex.Read <int>();
EncryptedFileCount = 0;
primaryIndex.Position += 8; // PathHashSeed
if (!primaryIndex.ReadBoolean())
{
throw new ParserException(primaryIndex, "No path hash index");
}
primaryIndex.Position += 36; // PathHashIndexOffset (long) + PathHashIndexSize (long) + PathHashIndexHash (20 bytes)
if (!primaryIndex.ReadBoolean())
{
throw new ParserException(primaryIndex, "No directory index");
}
var directoryIndexOffset = primaryIndex.Read <long>();
var directoryIndexSize = primaryIndex.Read <long>();
primaryIndex.Position += 20; // Directory Index hash
var encodedPakEntriesSize = primaryIndex.Read <int>();
var encodedPakEntries = primaryIndex.ReadBytes(encodedPakEntriesSize);
if (primaryIndex.Read <int>() < 0)
{
throw new ParserException("Corrupt pak PrimaryIndex detected");
}
// Read FDirectoryIndex
Ar.Position = directoryIndexOffset;
var directoryIndex = new FByteArchive($"{Name} - Directory Index", ReadAndDecrypt((int)directoryIndexSize));
unsafe
{
fixed(byte *ptr = encodedPakEntries)
{
var directoryIndexLength = directoryIndex.Read <int>();
var files = new Dictionary <string, GameFile>(fileCount);
for (var i = 0; i < directoryIndexLength; i++)
{
var dir = directoryIndex.ReadFString();
var dirDictLength = directoryIndex.Read <int>();
for (var j = 0; j < dirDictLength; j++)
{
var name = directoryIndex.ReadFString();
var path = string.Concat(mountPoint, dir, name);
var entry = new FPakEntry(this, path, ptr + directoryIndex.Read <int>());
if (entry.IsEncrypted)
{
EncryptedFileCount++;
}
if (caseInsensitive)
{
files[path.ToLowerInvariant()] = entry;
}
else
{
files[path] = entry;
}
}
}
Files = files;
return(files);
}
}
}