WPS: Do not advertise support for WEP in WPS 2.0 build

There is no point in advertising support for WEP or Shared Key
authentication if we are going to reject those anyway based on
WPS 2.0 rules.

src/wps/wps_attr_build.c

@@ -254,20 +254,28 @@ int wps_build_registrar_nonce(struct wps_data *wps, struct wpabuf *msg)
 
 int wps_build_auth_type_flags(struct wps_data *wps, struct wpabuf *msg)
 {
+	u16 auth_types = WPS_AUTH_TYPES;
+#ifdef CONFIG_WPS2
+	auth_types &= ~WPS_AUTH_SHARED;
+#endif /* CONFIG_WPS2 */
 	wpa_printf(MSG_DEBUG, "WPS:  * Authentication Type Flags");
 	wpabuf_put_be16(msg, ATTR_AUTH_TYPE_FLAGS);
 	wpabuf_put_be16(msg, 2);
-	wpabuf_put_be16(msg, WPS_AUTH_TYPES);
+	wpabuf_put_be16(msg, auth_types);
 	return 0;
 }
 
 
 int wps_build_encr_type_flags(struct wps_data *wps, struct wpabuf *msg)
 {
+	u16 encr_types = WPS_ENCR_TYPES;
+#ifdef CONFIG_WPS2
+	encr_types &= ~WPS_ENCR_WEP;
+#endif /* CONFIG_WPS2 */
 	wpa_printf(MSG_DEBUG, "WPS:  * Encryption Type Flags");
 	wpabuf_put_be16(msg, ATTR_ENCR_TYPE_FLAGS);
 	wpabuf_put_be16(msg, 2);
-	wpabuf_put_be16(msg, WPS_ENCR_TYPES);
+	wpabuf_put_be16(msg, encr_types);
 	return 0;
 }