ec_shortw_crv_init
ATTRIBUTE_WARN_UNUSED_RET int ec_shortw_crv_init(ec_shortw_crv_t crv, fp_src_t a, fp_src_t b, nn_src_t order);
ret = ec_shortw_crv_init(shortw_crv, &a, &b, &(montgomery_crv->order));
ret = ec_shortw_crv_init(&(out_params->ec_curve), &tmp_a, &tmp_b, &tmp_curve_order); EG(ret, err);