/// <summary>Get decryptor from pool</summary>
/// <exception cref="System.IO.IOException"/>
private Decryptor GetDecryptor()
{
Decryptor decryptor = decryptorPool.Poll();
if (decryptor == null)
{
try
{
decryptor = codec.CreateDecryptor();
}
catch (GeneralSecurityException e)
{
throw new IOException(e);
}
}
return(decryptor);
}
