WPS: Add a workaround for OS X 10.6.3 and .4 (use PSK, not passphrase)

It looks like 10.6.3 and 10.6.4 do not like to receive Network Key
with WPA passphrase while PSK format still works. Use peer information
from M1 to figure out whether the Enrollee is likely to be OS X and
if so, force PSK format to be used for Network Key.

src/wps/wps_registrar.c

@@ -2115,6 +2115,23 @@ static enum wps_process_res wps_process_m1(struct wps_data *wps,
 		wps->pbc = 1;
 	}
 
+#ifdef WPS_WORKAROUNDS
+	/*
+	 * It looks like Mac OS X 10.6.3 and 10.6.4 do not like Network Key in
+	 * passphrase format. To avoid interop issues, force PSK format to be
+	 * used.
+	 */
+	if (!wps->use_psk_key &&
+	    wps->peer_dev.manufacturer &&
+	    os_strncmp(wps->peer_dev.manufacturer, "Apple ", 6) == 0 &&
+	    wps->peer_dev.model_name &&
+	    os_strcmp(wps->peer_dev.model_name, "AirPort") == 0) {
+		wpa_printf(MSG_DEBUG, "WPS: Workaround - Force Network Key in "
+			   "PSK format");
+		wps->use_psk_key = 1;
+	}
+#endif /* WPS_WORKAROUNDS */
+
 	wps->state = SEND_M2;
 	return WPS_CONTINUE;
 }