crypto_mac_prov
error = crypto_mac_prov(pd, 0, &mech,
error = crypto_mac_prov(mac_pd, 0, &mac_mech, &mac_data,
error = crypto_mac_prov(mac_pd, 0, &mac_mech,
extern int crypto_mac_prov(crypto_provider_t, crypto_session_id_t,