s(), OSSL_FUNC_mac_get_ctx_params(), and OSSL_FUNC_mac_set_ctx_params() can handle, respectively. OSSL_FUNC_mac_gettable_ctx_params() and OSSL_FUNC_mac_settable_ctx_params() will return the parameters associated with the provider side context <i>mctx</i> in its current state if it is not NULL. Otherwise, they return the parameters associated with the provider side algorithm <i>provctx</i>.</p>

<p>All MAC implementations are expected to handle the following parameters:</p>

<dl>

<dt id="with-OSSL_FUNC_set_