cryptd_hash_complete
cryptd_hash_complete(req, err, cryptd_hash_init);
cryptd_hash_complete(req, err, cryptd_hash_update);
cryptd_hash_complete(req, err, cryptd_hash_final);
cryptd_hash_complete(req, err, cryptd_hash_finup);
cryptd_hash_complete(req, err, cryptd_hash_digest);