public OutputStreamEncryption(Stream outc, byte[] key, int off, int len, int revision)
{
Outc = outc;
_aes = revision == Aes128;
if (_aes)
{
byte[] iv = IvGenerator.GetIv();
byte[] nkey = new byte[len];
Array.Copy(key, off, nkey, 0, len);
Cipher = new AesCipher(true, nkey, iv);
Write(iv, 0, iv.Length);
}
else
{
Arcfour = new ArcfourEncryption();
Arcfour.PrepareArcfourKey(key, off, len);
}
}
