/// <summary>
/// Decrypt the incoming encryptedStream.
/// </summary>
/// <param name="encryptedStream"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns>The plaintext stream derived from encrypted stream</returns>
public Stream DecryptStream(Stream encryptedStream, byte[] key, byte[] iv)
{
ICryptoTransform iTransform = new Salsa20CryptoTransform(key, iv);
return(new CryptoStream(encryptedStream, iTransform, CryptoStreamMode.Read));
}
/// <summary>
/// Encrypt the incoming plainTextStream.
/// </summary>
/// <param name="plainTextStream"></param>
/// <param name="key"></param>
/// <param name="iv"></param>
/// <returns>An encrypted stream of bytes</returns>
public Stream EncryptStream(Stream plainTextStream, byte[] key, byte[] iv)
{
ICryptoTransform iTransform = new Salsa20CryptoTransform(key, iv);
return(new CryptoStream(plainTextStream, iTransform, CryptoStreamMode.Write));
}