/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see .
*
* Author: David Zeuthen
*/
#include "config.h"
#include "gdbusauthobserver.h"
#include "gcredentials.h"
#include "gioenumtypes.h"
#include "giostream.h"
#include "gdbusprivate.h"
#include "glibintl.h"
/**
* SECTION:gdbusauthobserver
* @short_description: Object used for authenticating connections
* @include: gio/gio.h
*
* The #GDBusAuthObserver type provides a mechanism for participating
* in how a #GDBusServer (or a #GDBusConnection) authenticates remote
* peers. Simply instantiate a #GDBusAuthObserver and connect to the
* signals you are interested in. Note that new signals may be added
* in the future
*
* ## Controlling Authentication # {#auth-observer}
*
* For example, if you only want to allow D-Bus connections from
* processes owned by the same uid as the server, you would use a
* signal handler like the following:
*
* |[
* 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;
* }
* ]|
*/
typedef struct _GDBusAuthObserverClass GDBusAuthObserverClass;
/**
* GDBusAuthObserverClass:
* @authorize_authenticated_peer: Signal class handler for the #GDBusAuthObserver::authorize-authenticated-peer signal.
*
* Class structure for #GDBusAuthObserverClass.
*
* Since: 2.26
*/
struct _GDBusAuthObserverClass
{
/*< private >*/
GObjectClass parent_class;
/*< public >*/
/* Signals */
gboolean (*authorize_authenticated_peer) (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials);
gboolean (*allow_mechanism) (GDBusAuthObserver *observer,
const gchar *mechanism);
};
/**
* GDBusAuthObserver:
*
* The #GDBusAuthObserver structure contains only private data and
* should only be accessed using the provided API.
*
* Since: 2.26
*/
struct _GDBusAuthObserver
{
GObject parent_instance;
};
enum
{
AUTHORIZE_AUTHENTICATED_PEER_SIGNAL,
ALLOW_MECHANISM_SIGNAL,
LAST_SIGNAL,
};
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GDBusAuthObserver, g_dbus_auth_observer, G_TYPE_OBJECT)
/* ---------------------------------------------------------------------------------------------------- */
static void
g_dbus_auth_observer_finalize (GObject *object)
{
G_OBJECT_CLASS (g_dbus_auth_observer_parent_class)->finalize (object);
}
static gboolean
g_dbus_auth_observer_authorize_authenticated_peer_real (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials)
{
return TRUE;
}
static gboolean
g_dbus_auth_observer_allow_mechanism_real (GDBusAuthObserver *observer,
const gchar *mechanism)
{
return TRUE;
}
static void
g_dbus_auth_observer_class_init (GDBusAuthObserverClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = g_dbus_auth_observer_finalize;
klass->authorize_authenticated_peer = g_dbus_auth_observer_authorize_authenticated_peer_real;
klass->allow_mechanism = g_dbus_auth_observer_allow_mechanism_real;
/**
* GDBusAuthObserver::authorize-authenticated-peer:
* @observer: The #GDBusAuthObserver emitting the signal.
* @stream: A #GIOStream for the #GDBusConnection.
* @credentials: (nullable): Credentials received from the peer or %NULL.
*
* Emitted to check if a peer that is successfully authenticated
* is authorized.
*
* Returns: %TRUE if the peer is authorized, %FALSE if not.
*
* Since: 2.26
*/
signals[AUTHORIZE_AUTHENTICATED_PEER_SIGNAL] =
g_signal_new (I_("authorize-authenticated-peer"),
G_TYPE_DBUS_AUTH_OBSERVER,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusAuthObserverClass, authorize_authenticated_peer),
_g_signal_accumulator_false_handled,
NULL, /* accu_data */
NULL,
G_TYPE_BOOLEAN,
2,
G_TYPE_IO_STREAM,
G_TYPE_CREDENTIALS);
/**
* GDBusAuthObserver::allow-mechanism:
* @observer: The #GDBusAuthObserver emitting the signal.
* @mechanism: The name of the mechanism, e.g. `DBUS_COOKIE_SHA1`.
*
* Emitted to check if @mechanism is allowed to be used.
*
* Returns: %TRUE if @mechanism can be used to authenticate the other peer, %FALSE if not.
*
* Since: 2.34
*/
signals[ALLOW_MECHANISM_SIGNAL] =
g_signal_new (I_("allow-mechanism"),
G_TYPE_DBUS_AUTH_OBSERVER,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusAuthObserverClass, allow_mechanism),
_g_signal_accumulator_false_handled,
NULL, /* accu_data */
NULL,
G_TYPE_BOOLEAN,
1,
G_TYPE_STRING);
}
static void
g_dbus_auth_observer_init (GDBusAuthObserver *observer)
{
}
/**
* g_dbus_auth_observer_new:
*
* Creates a new #GDBusAuthObserver object.
*
* Returns: A #GDBusAuthObserver. Free with g_object_unref().
*
* Since: 2.26
*/
GDBusAuthObserver *
g_dbus_auth_observer_new (void)
{
return g_object_new (G_TYPE_DBUS_AUTH_OBSERVER, NULL);
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_auth_observer_authorize_authenticated_peer:
* @observer: A #GDBusAuthObserver.
* @stream: A #GIOStream for the #GDBusConnection.
* @credentials: (nullable): Credentials received from the peer or %NULL.
*
* Emits the #GDBusAuthObserver::authorize-authenticated-peer signal on @observer.
*
* Returns: %TRUE if the peer is authorized, %FALSE if not.
*
* Since: 2.26
*/
gboolean
g_dbus_auth_observer_authorize_authenticated_peer (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials)
{
gboolean denied;
denied = FALSE;
g_signal_emit (observer,
signals[AUTHORIZE_AUTHENTICATED_PEER_SIGNAL],
0,
stream,
credentials,
&denied);
return denied;
}
/**
* g_dbus_auth_observer_allow_mechanism:
* @observer: A #GDBusAuthObserver.
* @mechanism: The name of the mechanism, e.g. `DBUS_COOKIE_SHA1`.
*
* Emits the #GDBusAuthObserver::allow-mechanism signal on @observer.
*
* Returns: %TRUE if @mechanism can be used to authenticate the other peer, %FALSE if not.
*
* Since: 2.34
*/
gboolean
g_dbus_auth_observer_allow_mechanism (GDBusAuthObserver *observer,
const gchar *mechanism)
{
gboolean ret;
ret = FALSE;
g_signal_emit (observer,
signals[ALLOW_MECHANISM_SIGNAL],
0,
mechanism,
&ret);
return ret;
}