FILS: Add support to write FILS key_mgmt values in network blocks

Add support to write FILS related key_mgmt values also while saving a
network block.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/config.c

@@ -938,6 +938,47 @@ static char * wpa_config_write_key_mgmt(const struct parse_data *data,
 	}
 #endif /* CONFIG_SUITEB192 */
 
+#ifdef CONFIG_FILS
+	if (ssid->key_mgmt & WPA_KEY_MGMT_FILS_SHA256) {
+		ret = os_snprintf(pos, end - pos, "%sFILS-SHA256",
+				  pos == buf ? "" : " ");
+		if (os_snprintf_error(end - pos, ret)) {
+			end[-1] = '\0';
+			return buf;
+		}
+		pos += ret;
+	}
+	if (ssid->key_mgmt & WPA_KEY_MGMT_FILS_SHA384) {
+		ret = os_snprintf(pos, end - pos, "%sFILS-SHA384",
+				  pos == buf ? "" : " ");
+		if (os_snprintf_error(end - pos, ret)) {
+			end[-1] = '\0';
+			return buf;
+		}
+		pos += ret;
+	}
+#ifdef CONFIG_IEEE80211R
+	if (ssid->key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA256) {
+		ret = os_snprintf(pos, end - pos, "%sFT-FILS-SHA256",
+				  pos == buf ? "" : " ");
+		if (os_snprintf_error(end - pos, ret)) {
+			end[-1] = '\0';
+			return buf;
+		}
+		pos += ret;
+	}
+	if (ssid->key_mgmt & WPA_KEY_MGMT_FT_FILS_SHA384) {
+		ret = os_snprintf(pos, end - pos, "%sFT-FILS-SHA384",
+				  pos == buf ? "" : " ");
+		if (os_snprintf_error(end - pos, ret)) {
+			end[-1] = '\0';
+			return buf;
+		}
+		pos += ret;
+	}
+#endif /* CONFIG_IEEE80211R */
+#endif /* CONFIG_FILS */
+
 	if (pos == buf) {
 		os_free(buf);
 		buf = NULL;