|| (bn_wexpand(r->Z, group_top) == NULL))
goto err;
+ /*-
+ * Apply coordinate blinding for EC_POINT.
+ *
+ * The underlying EC_METHOD can optionally implement this function:
+ * ec_point_blind_coordinates() returns 0 in case of errors or 1 on
+ * success or if coordinate blinding is not implemented for this
+ * group.
+ */
+ if (!ec_point_blind_coordinates(group, s, ctx))
+ goto err;
+
/* top bit is a 1, in a fixed pos */
if (!EC_POINT_copy(r, s))
goto err;