property strings return an error on receiving this parameter unless
its value NULL or the empty string.
+=item "save-parameters" (B<OSSL_ENCODER_PARAM_SAVE_PARAMETERS>) <integer>
+
+If set to 0 disables saving of key domain parameters. Default is 1.
+It currently has an effect only on DSA keys.
+
=back
Parameters currently recognised by the built-in pass phrase callback: