/// <summary>Add a PBE encryption method to the encrypted object.</summary>
public void AddMethod(ReadOnlySpan <byte> rawPassPhrase, PgpHashAlgorithm s2kDigest)
{
S2k s2k = PgpUtilities.GenerateS2k(s2kDigest, 0x60);
byte[] key = new byte[PgpUtilities.GetKeySize(defAlgorithm) / 8];
S2kBasedEncryption.MakeKey(rawPassPhrase, s2kDigest, s2k.GetIV(), s2k.IterationCount, key);
methods.Add(new PbeMethod(defAlgorithm, s2k, key));
}
