private static void UnpackRegulationFile(Options options)
{
using (FileStream inputStream = new FileStream(options.InputPath, FileMode.Open, FileAccess.Read))
{
EncFile encryptedFile = EncFile.ReadEncFile(inputStream, DecryptionKeys.RegulationFileKey);
DcxFile compressedRegulationFile = DcxFile.Read(encryptedFile.Data);
UnpackBndFile(new MemoryStream(compressedRegulationFile.Decompress()), options.OutputPath);
}
}
private static void UnpackBdf4File(Options options)
{
string bdfDirectoryPath = Path.GetDirectoryName(options.InputPath);
string bhf4Extension = Path.GetExtension(options.InputPath).Replace("bdt", "bhd");
string bhf4FilePath = Path.Combine(bdfDirectoryPath, Path.GetFileNameWithoutExtension(options.InputPath) + bhf4Extension);
if (!File.Exists(bhf4FilePath))
{
// HACK: Adding 132 to a hash of a text that ends with XXX.bdt will give you the hash of XXX.bhd.
string[] split = Path.GetFileNameWithoutExtension(options.InputPath).Split('_');
uint hash;
if (uint.TryParse(split[0], out hash))
{
hash += 132;
split[0] = hash.ToString("D10");
bhf4FilePath = Path.Combine(bdfDirectoryPath, string.Join("_", split) + ".bhd");
}
}
using (Bdf4FileStream bdf4InputStream = Bdf4FileStream.OpenFile(options.InputPath, FileMode.Open, FileAccess.Read))
{
Bhf4File bhf4File = Bhf4File.OpenBhf4File(bhf4FilePath);
foreach (var entry in bhf4File.Entries)
{
MemoryStream data = bdf4InputStream.Read(entry.FileOffset, entry.FileSize);
string fileName = entry.FileName;
string fileExtension = Path.GetExtension(fileName);
if (fileExtension == ".dcx")
{
DcxFile dcxFile = DcxFile.Read(data);
data = new MemoryStream(dcxFile.Decompress());
fileName = Path.Combine(Path.GetDirectoryName(fileName), Path.GetFileNameWithoutExtension(fileName));
}
string outputFilePath = Path.Combine(options.OutputPath, fileName);
Directory.CreateDirectory(Path.GetDirectoryName(outputFilePath));
File.WriteAllBytes(outputFilePath, data.ToArray());
}
}
}
private static void UnpackDcxFile(Options options)
{
string unpackedFileName = Path.GetFileNameWithoutExtension(options.InputPath);
string outputFilePath = options.OutputPath;
bool hasExtension = Path.GetExtension(unpackedFileName) != "";
using (FileStream inputStream = new FileStream(options.InputPath, FileMode.Open, FileAccess.Read))
{
DcxFile dcxFile = DcxFile.Read(inputStream);
byte[] decompressedData = dcxFile.Decompress();
if (!hasExtension)
{
string extension = GetDataExtension(new MemoryStream(decompressedData));
if (extension != ".dcx")
{
outputFilePath += extension;
}
}
File.WriteAllBytes(outputFilePath, decompressedData);
}
}
private static void UnpackBdtFile(Options options)
{
FileNameDictionary dictionary = FileNameDictionary.OpenFromFile(options.InputGameVersion);
string fileNameWithoutExtension = Path.GetFileName(options.InputPath).Replace("Ebl.bdt", "").Replace(".bdt", "");
string archiveName = fileNameWithoutExtension.ToLower();
using (Bdt5FileStream bdtStream = Bdt5FileStream.OpenFile(options.InputPath, FileMode.Open, FileAccess.Read))
{
Bhd5File bhdFile = Bhd5File.Read(
inputStream: DecryptBhdFile(
filePath: Path.ChangeExtension(options.InputPath, "bhd"),
version: options.InputGameVersion),
version: options.InputGameVersion
);
foreach (var bucket in bhdFile.GetBuckets())
{
foreach (var entry in bucket.GetEntries())
{
MemoryStream data;
if (entry.FileSize == 0)
{
long fileSize;
if (!TryReadFileSize(entry, bdtStream, out fileSize))
{
Console.WriteLine($"Unable to determine the length of file '{entry.FileNameHash:D10}'");
continue;
}
entry.FileSize = fileSize;
}
if (entry.IsEncrypted)
{
data = bdtStream.Read(entry.FileOffset, entry.PaddedFileSize);
CryptographyUtility.DecryptAesEcb(data, entry.AesKey.Key, entry.AesKey.Ranges);
data.Position = 0;
data.SetLength(entry.FileSize);
}
else
{
data = bdtStream.Read(entry.FileOffset, entry.FileSize);
}
string fileName;
string dataExtension = GetDataExtension(data);
bool fileNameFound = dictionary.TryGetFileName(entry.FileNameHash, archiveName, out fileName);
if (!fileNameFound)
{
fileNameFound = dictionary.TryGetFileName(entry.FileNameHash, archiveName, dataExtension, out fileName);
}
string extension;
if (fileNameFound)
{
extension = Path.GetExtension(fileName);
if (dataExtension == ".dcx" && extension != ".dcx")
{
extension = ".dcx";
fileName += ".dcx";
}
}
else
{
extension = dataExtension;
fileName = $"{entry.FileNameHash:D10}_{fileNameWithoutExtension}{extension}";
}
if (extension == ".enc")
{
byte[] decryptionKey;
if (DecryptionKeys.TryGetAesFileKey(Path.GetFileName(fileName), out decryptionKey))
{
EncFile encFile = EncFile.ReadEncFile(data, decryptionKey);
data = encFile.Data;
fileName = Path.Combine(Path.GetDirectoryName(fileName), Path.GetFileNameWithoutExtension(fileName));
extension = Path.GetExtension(fileName);
}
else
{
Debug.WriteLine($"No decryption key for file \'{fileName}\' found.");
}
}
if (extension == ".dcx")
{
DcxFile dcxFile = DcxFile.Read(data);
data = new MemoryStream(dcxFile.Decompress());
fileName = Path.Combine(Path.GetDirectoryName(fileName), Path.GetFileNameWithoutExtension(fileName));
if (fileNameFound)
{
extension = Path.GetExtension(fileName);
}
else
{
extension = GetDataExtension(data);
fileName += extension;
}
}
if (extension == ".bnd")
{
UnpackBnd3File(data, options.OutputPath);
continue; // don't actually unpack bnds
}
Debug.WriteLine(
"{0}\t{1}\t{2}\t{3}\t{4}\t{5}\t{6}\t{7}\t{8}",
fileNameWithoutExtension,
fileName,
extension,
entry.FileNameHash,
entry.FileOffset,
entry.FileSize,
entry.PaddedFileSize,
entry.IsEncrypted,
fileNameFound);
string newFileNamePath = Path.Combine(options.OutputPath, fileName);
Directory.CreateDirectory(Path.GetDirectoryName(newFileNamePath));
File.WriteAllBytes(newFileNamePath, data.ToArray());
}
}
}
}
