GDBusAuthObserver

gio.dbus_auth_observer.DBusAuthObserver provides a mechanism for participating in how a gio.dbus_server.DBusServer (or a gio.dbus_connection.DBusConnection) authenticates remote peers.

Simply instantiate a gio.dbus_auth_observer.DBusAuthObserver and connect to the signals you are interested in. Note that new signals may be added in the future.

Controlling Authentication Mechanisms

By default, a gio.dbus_server.DBusServer or server-side gio.dbus_connection.DBusConnection will allow any authentication mechanism to be used. If you only want to allow D-Bus connections with the EXTERNAL mechanism, which makes use of credentials passing and is the recommended mechanism for modern Unix platforms such as Linux and the BSD family, you would use a signal handler like this:

static gboolean
on_allow_mechanism (GDBusAuthObserver *observer,
                    const gchar       *mechanism,
                    gpointer           user_data)
{
  if (g_strcmp0 (mechanism, "EXTERNAL") == 0)
    {
      return TRUE;
    }

  return FALSE;
}

Controlling Authorization

By default, a gio.dbus_server.DBusServer or server-side gio.dbus_connection.DBusConnection will accept connections from any successfully authenticated user (but not from anonymous connections using the ANONYMOUS mechanism). If you only want to allow D-Bus connections from processes owned by the same uid as the server, since GLib 2.68, you should use the gio.types.DBusServerFlags.AuthenticationRequireSameUser flag. It’s equivalent to the following signal handler:

static gboolean
on_authorize_authenticated_peer (GDBusAuthObserver *observer,
                                 GIOStream         *stream,
                                 GCredentials      *credentials,
                                 gpointer           user_data)
{
  gboolean authorized;

  authorized = FALSE;
  if (credentials != NULL)
    {
      GCredentials *own_credentials;
      own_credentials = g_credentials_new ();
      if (g_credentials_is_same_user (credentials, own_credentials, NULL))
        authorized = TRUE;
      g_object_unref (own_credentials);
    }

  return authorized;
}