int ec_point_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx)
{
    if (group->meth->blind_coordinates == NULL)
        return 1; /* ignore if not implemented */

    return group->meth->blind_coordinates(group, p, ctx);
}
int ec_point_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx)
{
    if (group->meth->blind_coordinates == NULL)
        return 1;  

    return group->meth->blind_coordinates(group, p, ctx);
}