WPS: Allow NFC password token from AP to be used with wps_reg

The AP PIN on wps_reg command can now be replaced with special value
"nfc-pw" to use device password from a NFC password token from the AP.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/eap_peer/eap_wsc.c

@@ -138,6 +138,7 @@ static void * eap_wsc_init(struct eap_sm *sm)
 	struct wps_credential new_ap_settings;
 	int res;
 	u8 dev_pw[WPS_OOB_DEVICE_PASSWORD_LEN];
+	int nfc = 0;
 
 	wps = sm->wps;
 	if (wps == NULL) {
@@ -193,13 +194,18 @@ static void * eap_wsc_init(struct eap_sm *sm)
 			cfg.pin = dev_pw;
 			cfg.pin_len /= 2;
 		}
+		if (cfg.pin_len == 6 && os_strncmp(pos, "nfc-pw", 6) == 0) {
+			cfg.pin = NULL;
+			cfg.pin_len = 0;
+			nfc = 1;
+		}
 	} else {
 		pos = os_strstr(phase1, "pbc=1");
 		if (pos)
 			cfg.pbc = 1;
 	}
 
-	if (cfg.pin == NULL && !cfg.pbc) {
+	if (cfg.pin == NULL && !cfg.pbc && !nfc) {
 		wpa_printf(MSG_INFO, "EAP-WSC: PIN or PBC not set in phase1 "
 			   "configuration data");
 		os_free(data);

wpa_supplicant/wps_supplicant.c

@@ -1897,21 +1897,13 @@ static int wpas_wps_use_cred(struct wpa_supplicant *wpa_s,
 }
 
 
-#ifdef CONFIG_WPS_ER
 static int wpas_wps_add_nfc_password_token(struct wpa_supplicant *wpa_s,
 					   struct wps_parse_attr *attr)
 {
-	if (wpa_s->wps_er == NULL) {
-		wpa_printf(MSG_DEBUG, "WPS: Ignore NFC password token while "
-			   "ER functionality is disabled");
-		return -1;
-	}
-
 	return wps_registrar_add_nfc_password_token(
 		wpa_s->wps->registrar, attr->oob_dev_password,
 		attr->oob_dev_password_len);
 }
-#endif /* CONFIG_WPS_ER */
 
 
 static int wpas_wps_nfc_tag_process(struct wpa_supplicant *wpa_s,