WPS: Make Config Methods configurable for wpa_supplicant

This adds config_methods configuration option for wpa_supplicant
following the design used in hostapd. In addition, the string is
now parsed in common code from src/wps/wps_common.c and the list
of configurable methods include all the defined methods from
WPS 1.0h spec.

hostapd/hostapd.conf

@@ -891,6 +891,8 @@ own_ip_addr=127.0.0.1
 
 # Config Methods
 # List of the supported configuration methods
+# Available methods: usba ethernet label display ext_nfc_token int_nfc_token
+#	nfc_interface push_button keypad
 #config_methods=label display push_button keypad
 
 # Access point PIN for initial configuration and adding Registrars

hostapd/wps_hostapd.c

@@ -531,17 +531,8 @@ int hostapd_init_wps(struct hostapd_data *hapd,
 		os_strdup(hapd->conf->model_number) : NULL;
 	wps->dev.serial_number = hapd->conf->serial_number ?
 		os_strdup(hapd->conf->serial_number) : NULL;
-	if (hapd->conf->config_methods) {
-		char *m = hapd->conf->config_methods;
-		if (os_strstr(m, "label"))
-			wps->config_methods |= WPS_CONFIG_LABEL;
-		if (os_strstr(m, "display"))
-			wps->config_methods |= WPS_CONFIG_DISPLAY;
-		if (os_strstr(m, "push_button"))
-			wps->config_methods |= WPS_CONFIG_PUSHBUTTON;
-		if (os_strstr(m, "keypad"))
-			wps->config_methods |= WPS_CONFIG_KEYPAD;
-	}
+	wps->config_methods =
+		wps_config_methods_str2bin(hapd->conf->config_methods);
 	if (hapd->conf->device_type &&
 	    wps_dev_type_str2bin(hapd->conf->device_type,
 				 wps->dev.pri_dev_type) < 0) {

src/wps/wps.h

@@ -715,5 +715,6 @@ int wps_dev_type_str2bin(const char *str, u8 dev_type[WPS_DEV_TYPE_LEN]);
 char * wps_dev_type_bin2str(const u8 dev_type[WPS_DEV_TYPE_LEN], char *buf,
 			    size_t buf_len);
 void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid);
+u16 wps_config_methods_str2bin(const char *str);
 
 #endif /* WPS_H */

src/wps/wps_common.c

@@ -595,3 +595,42 @@ void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
 	/* Variant specified in RFC 4122 */
 	uuid[8] = 0x80 | (uuid[8] & 0x3f);
 }
+
+
+u16 wps_config_methods_str2bin(const char *str)
+{
+	u16 methods = 0;
+
+	if (str == NULL) {
+		/* Default to enabling methods based on build configuration */
+		methods |= WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY |
+			WPS_CONFIG_KEYPAD;
+#ifdef CONFIG_WPS_UFD
+		methods |= WPS_CONFIG_USBA;
+#endif /* CONFIG_WPS_UFD */
+#ifdef CONFIG_WPS_NFC
+		methods |= WPS_CONFIG_NFC_INTERFACE;
+#endif /* CONFIG_WPS_NFC */
+	} else {
+		if (os_strstr(str, "usba"))
+			methods |= WPS_CONFIG_USBA;
+		if (os_strstr(str, "ethernet"))
+			methods |= WPS_CONFIG_ETHERNET;
+		if (os_strstr(str, "label"))
+			methods |= WPS_CONFIG_LABEL;
+		if (os_strstr(str, "display"))
+			methods |= WPS_CONFIG_DISPLAY;
+		if (os_strstr(str, "ext_nfc_token"))
+			methods |= WPS_CONFIG_EXT_NFC_TOKEN;
+		if (os_strstr(str, "int_nfc_token"))
+			methods |= WPS_CONFIG_INT_NFC_TOKEN;
+		if (os_strstr(str, "nfc_interface"))
+			methods |= WPS_CONFIG_NFC_INTERFACE;
+		if (os_strstr(str, "push_button"))
+			methods |= WPS_CONFIG_PUSHBUTTON;
+		if (os_strstr(str, "keypad"))
+			methods |= WPS_CONFIG_KEYPAD;
+	}
+
+	return methods;
+}

src/wps/wps_enrollee.c

@@ -119,7 +119,6 @@ static int wps_build_e_snonce2(struct wps_data *wps, struct wpabuf *msg)
 static struct wpabuf * wps_build_m1(struct wps_data *wps)
 {
 	struct wpabuf *msg;
-	u16 methods;
 
 	if (os_get_random(wps->nonce_e, WPS_NONCE_LEN) < 0)
 		return NULL;
@@ -131,16 +130,6 @@ static struct wpabuf * wps_build_m1(struct wps_data *wps)
 	if (msg == NULL)
 		return NULL;
 
-	methods = WPS_CONFIG_LABEL | WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD;
-#ifdef CONFIG_WPS_UFD
-	methods |= WPS_CONFIG_USBA;
-#endif /* CONFIG_WPS_UFD */
-#ifdef CONFIG_WPS_NFC
-	methods |= WPS_CONFIG_NFC_INTERFACE;
-#endif /* CONFIG_WPS_NFC */
-	if (wps->pbc)
-		methods |= WPS_CONFIG_PUSHBUTTON;
-
 	if (wps_build_version(msg) ||
 	    wps_build_msg_type(msg, WPS_M1) ||
 	    wps_build_uuid_e(msg, wps->uuid_e) ||
@@ -150,7 +139,7 @@ static struct wpabuf * wps_build_m1(struct wps_data *wps)
 	    wps_build_auth_type_flags(wps, msg) ||
 	    wps_build_encr_type_flags(wps, msg) ||
 	    wps_build_conn_type_flags(wps, msg) ||
-	    wps_build_config_methods(msg, methods) ||
+	    wps_build_config_methods(msg, wps->wps->config_methods) ||
 	    wps_build_wps_state(wps, msg) ||
 	    wps_build_device_attrs(&wps->wps->dev, msg) ||
 	    wps_build_rf_bands(&wps->wps->dev, msg) ||

wpa_supplicant/config.c

@@ -1671,6 +1671,7 @@ void wpa_config_free(struct wpa_config *config)
 	os_free(config->model_number);
 	os_free(config->serial_number);
 	os_free(config->device_type);
+	os_free(config->config_methods);
 	os_free(config->pssid);
 	os_free(config);
 }

wpa_supplicant/config.h

@@ -297,6 +297,16 @@ struct wpa_config {
 	 */
 	char *device_type;
 
+	/**
+	 * config_methods - Config Methods
+	 *
+	 * This is a space-separated list of supported WPS configuration
+	 * methods. For example, "label display push_button keypad".
+	 * Available methods: usba ethernet label display ext_nfc_token
+	 * int_nfc_token nfc_interface push_button keypad.
+	 */
+	char *config_methods;
+
 	/**
 	 * os_version - OS Version (WPS)
 	 * 4-octet operating system version number

wpa_supplicant/config_file.c

@@ -454,6 +454,7 @@ static const struct global_parse_data global_fields[] = {
 	{ STR_RANGE(serial_number, 0, 32) },
 	{ STR(device_type) },
 	{ FUNC(os_version) },
+	{ STR(config_methods) },
 	{ INT_RANGE(wps_cred_processing, 0, 2) },
 #endif /* CONFIG_WPS */
 	{ FUNC(country) }
@@ -878,6 +879,8 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 	if (WPA_GET_BE32(config->os_version))
 		fprintf(f, "os_version=%08x\n",
 			WPA_GET_BE32(config->os_version));
+	if (config->config_methods)
+		fprintf(f, "config_methods=%s\n", config->config_methods);
 	if (config->wps_cred_processing)
 		fprintf(f, "wps_cred_processing=%d\n",
 			config->wps_cred_processing);

wpa_supplicant/config_winreg.c

@@ -249,6 +249,8 @@ static int wpa_config_read_global(struct wpa_config *config, HKEY hk)
 		hk, TEXT("serial_number"));
 	config->device_type = wpa_config_read_reg_string(
 		hk, TEXT("device_type"));
+	config->config_methods = wpa_config_read_reg_string(
+		hk, TEXT("config_methods"));
 	if (wpa_config_read_global_os_version(config, hk))
 		errors++;
 	wpa_config_read_reg_dword(hk, TEXT("wps_cred_processing"),
@@ -569,6 +571,8 @@ static int wpa_config_write_global(struct wpa_config *config, HKEY hk)
 	wpa_config_write_reg_string(hk, "serial_number",
 				    config->serial_number);
 	wpa_config_write_reg_string(hk, "device_type", config->device_type);
+	wpa_config_write_reg_string(hk, "config_methods",
+				    config->config_methods);
 	if (WPA_GET_BE32(config->os_version)) {
 		char vbuf[10];
 		os_snprintf(vbuf, sizeof(vbuf), "%08x",

wpa_supplicant/wpa_supplicant.conf

@@ -196,6 +196,12 @@ fast_reauth=1
 # 4-octet operating system version number (hex string)
 #os_version=01020300
 
+# Config Methods
+# List of the supported configuration methods
+# Available methods: usba ethernet label display ext_nfc_token int_nfc_token
+#	nfc_interface push_button keypad
+#config_methods=label display push_button keypad
+
 # Credential processing
 #   0 = process received credentials internally (default)
 #   1 = do not process received credentials; just pass them over ctrl_iface to

wpa_supplicant/wps_supplicant.c

@@ -841,6 +841,8 @@ int wpas_wps_init(struct wpa_supplicant *wpa_s)
 	wps->dev.model_name = wpa_s->conf->model_name;
 	wps->dev.model_number = wpa_s->conf->model_number;
 	wps->dev.serial_number = wpa_s->conf->serial_number;
+	wps->config_methods =
+		wps_config_methods_str2bin(wpa_s->conf->config_methods);
 	if (wpa_s->conf->device_type &&
 	    wps_dev_type_str2bin(wpa_s->conf->device_type,
 				 wps->dev.pri_dev_type) < 0) {
@@ -1116,8 +1118,6 @@ int wpas_wps_er_start(struct wpa_supplicant *wpa_s)
 		wps_er_refresh(wpa_s->wps_er);
 		return 0;
 	}
-	wpa_s->wps->config_methods |= WPS_CONFIG_DISPLAY;
-	wpa_s->wps->config_methods |= WPS_CONFIG_KEYPAD;
 	wpa_s->wps_er = wps_er_init(wpa_s->wps, wpa_s->ifname);
 	if (wpa_s->wps_er == NULL)
 		return -1;