/// <summary>
///
/// </summary>
/// <param name="raw">[Plain]</param>
/// <param name="key"></param>
/// <param name="nonce"></param>
/// <param name="aad"></param>
/// <returns>[Cipher][Tag]</returns>
protected override SmartBuffer EncryptChunk(ReadOnlyMemory <byte> raw, ReadOnlySpan <byte> key, ReadOnlySpan <byte> nonce, ReadOnlySpan <byte> aad = default)
{
var aead = this.CreateCipher(key, nonce, aad);
using (MemoryStream src = MemoryStreamManager.GetStream(), work = MemoryStreamManager.GetStream())
{
raw.CopyToStream(src);
src.Position = 0;
var tag = aead.Encrypt(src, src, work);
src.Position = 0;
var rt = SmartBuffer.Rent((int)raw.Length + tag.Length);
rt.SignificantLength = rt.Memory.CopyFromStream(src);
tag.AsMemory().CopyTo(rt.FreeMemory);
rt.SignificantLength += tag.Length;
return(rt);
}
}