public byte[] ReadInfoBlock(BinReader reader, Blowfish blowfish)
{
byte[] infoBufferDecompressed = new byte[InfoSizeUncompressed];
byte[] result = new byte[InfoSizeCompressed];
reader.Position = InfoOffset;
reader.Read(result, 0, InfoSizeCompressed);
if (IsInfoCompressed)
{
Decompress(result, infoBufferDecompressed, 0, (int)InfoSizeUncompressed, FileVersion < 9); // TODO: Check when exactly zlib header was removed
result = infoBufferDecompressed;
}
if (IsInfoEncrypted && blowfish != null)
{
blowfish.Decipher(result, (InfoSizeUncompressed / 8) * 8);
}
return(result);
}
public TellTaleBlowfishZlibStream(Stream stream, TellTaleFileStructureInfo fileInfo, byte[] key = null, bool useModifiedBlowfish = false)
{
reader = new BinReader(stream);
this.fileInfo = fileInfo;
virtualPosition = 0;
readBuffer = new byte[fileInfo.BlockSizeUncompressed];
if (key != null)
{
// Blowfish is stateless decryption per block (8 bytes), so we can
// create a single decrypter based on key/version specifics here:
blowfish = new Blowfish(key, useModifiedBlowfish);
}
// ttarch1: Preload the info block
if (fileInfo.HasInfo)
{
infoBuffer = fileInfo.ReadInfoBlock(reader, blowfish);
}
}
