thm for the operation <i>operation_id</i>. This is similar to provider_query_operation() (see <a href="../man7/provider-base.html">provider-base(7)</a>), but only works as an advisory. If this function is not present, or returns NULL, the caller is free to assume that there&#39;s an algorithm from the same provider, of the same name as the one used to fetch the keymgmt and try to use that.</p>

<p>OSSL_FUNC_keymgmt_has() should check whether the given <i>keydata</i> contains the subsets of data indicated by