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/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2009 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include "config.h"
#include <glib/gi18n.h>
#include "gdbusauthobserver.h"
#include "gdbus-marshal.h"
#include "gcredentials.h"
#include "gdbusenumtypes.h"
/**
* SECTION:gdbusauthobserver
* @short_description: Object used for authenticating connections
* @include: gdbus/gdbus.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
*
* For example, if you only want to allow D-Bus connections from
* processes owned by the same uid as the server, you would do this:
* <example id="auth-observer"><title>Controlling Authentication</title><programlisting>
* static gboolean
* on_deny_authenticated_peer (GDBusAuthObserver *observer,
* GIOStream *stream,
* GCredentials *credentials,
* gpointer user_data)
* {
* gboolean deny;
* deny = TRUE;
* if (credentials != NULL &&
* g_credentials_has_unix_user (credentials) &&
* g_credentials_get_unix_user (credentials) == getuid ())
* deny = FALSE;
* return deny;
* }
*
* static gboolean
* on_new_connection (GDBusServer *server,
* GDBusConnection *connection,
* gpointer user_data)
* {
* /<!-- -->* Guaranteed here that @connection is from a process owned by the same user *<!-- -->/
* }
*
* [...]
*
* GDBusAuthObserver *observer;
* GDBusServer *server;
* GError *error;
*
* error = NULL;
* observer = g_dbus_auth_observer_new ();
* server = g_dbus_server_new_sync ("unix:tmpdir=/tmp/my-app-name",
* G_DBUS_SERVER_FLAGS_NONE,
* observer,
* NULL, /<!-- -->* GCancellable *<!-- -->/
* &error);
* g_signal_connect (observer,
* "deny-authenticated-peer",
* G_CALLBACK (on_deny_authenticated_peer),
* NULL);
* g_signal_connect (server,
* "new-connection",
* G_CALLBACK (on_new_connection),
* NULL);
* g_object_unref (observer);
* g_dbus_server_start (server);
* </programlisting></example>
*/
struct _GDBusAuthObserverPrivate
{
gint foo;
};
enum
{
DENY_AUTHENTICATED_PEER_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)
{
//GDBusAuthObserver *observer = G_DBUS_AUTH_OBSERVER (object);
if (G_OBJECT_CLASS (g_dbus_auth_observer_parent_class)->finalize != NULL)
G_OBJECT_CLASS (g_dbus_auth_observer_parent_class)->finalize (object);
}
static gboolean
g_dbus_auth_observer_deny_authenticated_peer_real (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials)
{
return FALSE;
}
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->deny_authenticated_peer = g_dbus_auth_observer_deny_authenticated_peer_real;
/**
* GDBusAuthObserver::deny-authenticated-peer:
* @stream: A #GIOStream for the #GDBusConnection.
* @credentials: Credentials received from the peer or %NULL.
*
* Emitted to check if a peer that is successfully authenticated
* should be denied.
*
* Returns: %TRUE if the peer should be denied, %FALSE otherwise.
*/
signals[DENY_AUTHENTICATED_PEER_SIGNAL] =
g_signal_new ("deny-authenticated-peer",
G_TYPE_DBUS_AUTH_OBSERVER,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusAuthObserverClass, deny_authenticated_peer),
g_signal_accumulator_true_handled,
NULL, /* accu_data */
_gdbus_marshal_BOOLEAN__OBJECT_OBJECT,
G_TYPE_BOOLEAN,
2,
G_TYPE_IO_STREAM,
G_TYPE_CREDENTIALS);
g_type_class_add_private (klass, sizeof (GDBusAuthObserverPrivate));
}
static void
g_dbus_auth_observer_init (GDBusAuthObserver *observer)
{
/* not used for now */
observer->priv = G_TYPE_INSTANCE_GET_PRIVATE (observer,
G_TYPE_DBUS_AUTH_OBSERVER,
GDBusAuthObserverPrivate);;
}
/**
* g_dbus_auth_observer_new:
*
* Creates a new #GDBusAuthObserver object.
*
* Returns: A #GDBusAuthObserver. Free with g_object_unref().
*/
GDBusAuthObserver *
g_dbus_auth_observer_new (void)
{
return g_object_new (G_TYPE_DBUS_AUTH_OBSERVER, NULL);
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_auth_observer_deny_authenticated_peer:
* @observer: A #GDBusAuthObserver.
* @stream: A #GIOStream for the #GDBusConnection.
* @credentials: Credentials received from the peer or %NULL.
*
* Emits the #GDBusAuthObserver::deny-authenticated-peer signal on @observer.
*
* Returns: %TRUE if the peer should be denied, %FALSE otherwise.
*/
gboolean
g_dbus_auth_observer_deny_authenticated_peer (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials)
{
gboolean denied;
denied = FALSE;
g_signal_emit (observer,
signals[DENY_AUTHENTICATED_PEER_SIGNAL],
0,
stream,
credentials,
&denied);
return denied;
}
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