public async Task <T> DeserializeAsync(Stream sourceStream)
{
// Implement a BridgeStream to automatically and lazily read from one when writing to another.
// Try BufferedStream.
using (var memoryStream = new MemoryStream())
{
await _decryptor.ToDecryptedStreamAsync(sourceStream, memoryStream, _passphrase, _salt);
memoryStream.Position = 0;
return(await _serializer.DeserializeAsync(memoryStream));
}
}