CKA_SENSITIVE
add_object_attribute(o, 0, CKA_SENSITIVE, &bool_true, sizeof(bool_true));
FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));
FILL_ATTR(tpriv, npriv, CKA_SENSITIVE, &true_val, sizeof(true_val));