public Stream DecryptFileToStream(string name, Stream stream)
{
string fileName = Path.GetFileNameWithoutExtension(name);
if (fileName.Length != 32)
{
throw new ArgumentException("Invalid file name", nameof(name));
}
byte[] IV = fileName.Substring(16).FromHexString();
using (ICryptoTransform decryptor = KeyService.SalsaInstance.CreateDecryptor(_key, IV))
using (CryptoStream cs = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))
{
return(cs.CopyToMemoryStream());
}
}