-gboolean handle_req_sim_auth(Wifi *wifi, GDBusMethodInvocation *context,
- const gchar *rand_data);
-gboolean handle_req_aka_auth(Wifi *wifi, GDBusMethodInvocation *context,
- const gchar *rand_data, const gchar *autn_data);
+gboolean handle_req_sim_auth(Wifi *wifi, GDBusMethodInvocation *context, GVariant *rand_data);
+gboolean handle_req_aka_auth(Wifi *wifi, GDBusMethodInvocation *context, GVariant *rand_data, GVariant *autn_data);