CKA_UNWRAP
add_object_attribute(o, 0, CKA_UNWRAP, &bool_true, sizeof(bool_true));
FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));
FILL_ATTR(tpriv, npriv, CKA_UNWRAP, &false_val, sizeof(false_val));