wip: start to fold kerberos support into gsdwip/identity

32 files changed, 7631 insertions, 0 deletions

diff --git a/configure.ac b/configure.ac
index 65dc0d78..419ec979 100644
--- a/configure.ac
+++ b/configure.ac
@@ -290,6 +290,38 @@ fi
 
 AC_SUBST(NSS_DATABASE)
 
+dnl ==============================================
+dnl kerberos section
+dnl ==============================================
+AC_ARG_ENABLE([kerberos],
+              AS_HELP_STRING([--enable-kerberos], [Use Kerberos]),
+              [with_kerberos=$enableval],
+              [with_kerberos=no])
+
+AC_PATH_PROG([KRB5_CONFIG], krb5-config, none, $PATH:/usr/kerberos/bin)
+
+if test "x$KRB5_CONFIG" != "xnone"; then
+    KRB5_LIBS="`${KRB5_CONFIG} --libs krb5`"
+    KRB5_CFLAGS="`${KRB5_CONFIG} --cflags krb5`"
+    have_kerberos=yes
+else
+    KRB5_LIBS=""
+    KRB5_CFLAGS=""
+    have_kerberos=no
+fi
+AC_SUBST(KRB5_CFLAGS)
+AC_SUBST(KRB5_LIBS)
+
+if test "$with_kerberos" = "yes" ; then
+  if test "$have_kerberos" = "no" ; then
+      AC_MSG_ERROR([kerberos support requested, but not available])
+  fi
+
+  PKG_CHECK_MODULES(GCR, gcr-3)
+  AC_DEFINE(GCR_API_SUBJECT_TO_CHANGE, 1, [Define to use the GCR API])
+  AC_DEFINE(HAVE_KERBEROS, 1, [Define to 1 if kerberos is available])
+fi
+AM_CONDITIONAL(BUILD_KERBEROS, [test x$with_kerberos = xyes])
 
 dnl ==============================================
 dnl power section
@@ -461,6 +493,7 @@ plugins/color/Makefile
 plugins/common/Makefile
 plugins/cursor/Makefile
 plugins/dummy/Makefile
+plugins/identity/Makefile
 plugins/power/Makefile
 plugins/housekeeping/Makefile
 plugins/keyboard/Makefile
@@ -482,6 +515,7 @@ data/org.gnome.settings-daemon.plugins.gschema.xml.in
 data/org.gnome.settings-daemon.plugins.xsettings.gschema.xml.in
 data/org.gnome.settings-daemon.plugins.keyboard.gschema.xml.in
 data/org.gnome.settings-daemon.plugins.power.gschema.xml.in
+data/org.gnome.settings-daemon.plugins.identity.gschema.xml.in
 data/org.gnome.settings-daemon.plugins.color.gschema.xml.in
 data/org.gnome.settings-daemon.plugins.media-keys.gschema.xml.in
 data/org.gnome.settings-daemon.peripherals.gschema.xml.in
diff --git a/data/Makefile.am b/data/Makefile.am
index 5fc9f640..1ea31ec9 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -12,6 +12,7 @@ gsettings_SCHEMAS =							\
 	org.gnome.settings-daemon.plugins.keyboard.gschema.xml		\
 	org.gnome.settings-daemon.plugins.power.gschema.xml		\
 	org.gnome.settings-daemon.plugins.color.gschema.xml		\
+	org.gnome.settings-daemon.plugins.identity.gschema.xml		\
 	org.gnome.settings-daemon.plugins.media-keys.gschema.xml	\
 	org.gnome.settings-daemon.plugins.xsettings.gschema.xml		\
 	org.gnome.settings-daemon.plugins.housekeeping.gschema.xml	\
diff --git a/data/org.gnome.settings-daemon.plugins.identity.gschema.xml.in.in b/data/org.gnome.settings-daemon.plugins.identity.gschema.xml.in.in
new file mode 100644
index 00000000..caa5a4cf
--- /dev/null
+++ b/data/org.gnome.settings-daemon.plugins.identity.gschema.xml.in.in
@@ -0,0 +1,14 @@
+<schemalist>
+  <schema gettext-domain="@GETTEXT_PACKAGE@" id="org.gnome.settings-daemon.plugins.identity" path="/org/gnome/settings-daemon/plugins/identity/">
+    <key name="active" type="b">
+      <default>true</default>
+      <_summary>Activation of this plugin</_summary>
+      <_description>Whether this plugin would be activated by gnome-settings-daemon or not</_description>
+    </key>
+    <key name="priority" type="i">
+      <default>1</default>
+      <_summary>Priority to use for this plugin</_summary>
+      <_description>Priority to use for this plugin in gnome-settings-daemon startup queue</_description>
+    </key>
+  </schema>
+</schemalist>
diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index a4aa6669..418c86ec 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -33,6 +33,12 @@ else
 disabled_plugins += smartcard
 endif
 
+if BUILD_KERBEROS
+enabled_plugins += identity
+else
+disabled_plugins += identity
+endif
+
 if HAVE_GUDEV
 enabled_plugins += orientation
 else
diff --git a/plugins/identity/Makefile.am b/plugins/identity/Makefile.am
new file mode 100644
index 00000000..d9b311c5
--- /dev/null
+++ b/plugins/identity/Makefile.am
@@ -0,0 +1,144 @@
+plugin_name = identity
+
+plugin_LTLIBRARIES = \
+	libidentity.la
+
+dbus_built_sources = org.gnome.Identity.c org.gnome.Identity.h
+
+$(dbus_built_sources) : Makefile.am org.gnome.Identity.xml
+	gdbus-codegen                                       \
+		--interface-prefix org.gnome.Identity.      \
+		--c-namespace GsdIdentityService            \
+		--c-generate-object-manager                 \
+		--generate-c-code org.gnome.Identity        \
+		org.gnome.Identity.xml                      \
+		$(NULL)
+
+libidentity_headers = \
+	gsd-identity-plugin.h            \
+	gsd-alarm.h                      \
+	gsd-identity.h                   \
+	gsd-identity-inquiry.h           \
+	gsd-identity-manager.h           \
+	gsd-identity-manager-private.h   \
+	gsd-identity-service.h           \
+	gsd-kerberos-identity.h          \
+	gsd-kerberos-identity-inquiry.h  \
+	gsd-kerberos-identity-manager.h
+
+gsd-identity-enum-types.h: gsd-identity-enum-types.h.in $(libidentity_headers)
+	$(AM_V_GEN) glib-mkenums --template $^ > $@
+
+gsd-identity-enum-types.c: gsd-identity-enum-types.c.in $(libidentity_headers)
+	$(AM_V_GEN) glib-mkenums --template $^ > $@
+
+libidentity_la_SOURCES = \
+	$(libidentity_headers)           \
+	gsd-identity-plugin.c            \
+	gsd-alarm.c                      \
+	gsd-identity.c                   \
+	gsd-identity-enum-types.h        \
+	gsd-identity-enum-types.c        \
+	gsd-identity-inquiry.c           \
+	gsd-identity-manager.c           \
+	gsd-identity-service.c           \
+	gsd-kerberos-identity.c          \
+	gsd-kerberos-identity-inquiry.c  \
+	gsd-kerberos-identity-manager.c  \
+	$(dbus_built_sources)
+
+BUILT_SOURCES = $(dbus_built_sources) gsd-identity-enum-types.h gsd-identity-enum-types.c
+
+libidentity_la_CPPFLAGS = \
+	-I$(top_srcdir)/gnome-settings-daemon \
+	-DGNOME_SETTINGS_LOCALEDIR=\""$(datadir)/locale"\" \
+	-DSYSCONFDIR=\""$(sysconfdir)"\" \
+	-DLIBDIR=\""$(libdir)"\" \
+	-DGSD_SMARTCARD_MANAGER_NSS_DB=\""$(NSS_DATABASE)"\" \
+	$(AM_CPPFLAGS)
+
+libidentity_la_CFLAGS = \
+	$(PLUGIN_CFLAGS)	\
+	$(SETTINGS_PLUGIN_CFLAGS) \
+	$(GNOME_CFLAGS)	\
+	$(GCR_CFLAGS)	\
+	$(KRB5_CFLAGS)	\
+	$(AM_CFLAGS)
+
+libidentity_la_LDFLAGS = \
+	$(GSD_PLUGIN_LDFLAGS)
+
+libidentity_la_LIBADD = \
+	$(SETTINGS_PLUGIN_LIBS)	\
+	$(GCR_LIBS)	\
+	$(KRB5_LIBS)
+
+noinst_PROGRAMS =				\
+	test-identity
+
+test_identity_SOURCES =			\
+	gsd-alarm.h                      \
+	gsd-alarm.c                      \
+	gsd-identity.h                   \
+	gsd-identity.c                   \
+	gsd-identity-inquiry.c           \
+	gsd-identity-inquiry.h           \
+	gsd-identity-manager.h           \
+	gsd-identity-manager-private.h   \
+	gsd-identity-manager.c           \
+	gsd-kerberos-identity.c          \
+	gsd-kerberos-identity.h          \
+	gsd-kerberos-identity-inquiry.c  \
+	gsd-kerberos-identity-inquiry.h  \
+	gsd-kerberos-identity-manager.h  \
+	gsd-kerberos-identity-manager.c  \
+	gsd-identity-test.c		 \
+	test-identity.c			 \
+	$(NULL)
+
+test_identity_CPPFLAGS = \
+	-I$(top_srcdir)/data/					\
+	-I$(top_srcdir)/gnome-settings-daemon			\
+	-I$(top_srcdir)/plugins/common				\
+	-I$(top_srcdir)/plugins/media-keys/cut-n-paste		\
+	-DBINDIR=\"$(bindir)\"					\
+	-DPIXMAPDIR=\""$(pkgdatadir)"\"				\
+	-DGTKBUILDERDIR=\""$(pkgdatadir)"\"			\
+	-DGNOME_SETTINGS_LOCALEDIR=\""$(datadir)/locale"\"	\
+	$(AM_CPPFLAGS)
+
+test_identity_CFLAGS = \
+	$(PLUGIN_CFLAGS)	\
+	$(SETTINGS_PLUGIN_CFLAGS) \
+	$(GNOME_CFLAGS)	\
+	$(GCR_CFLAGS)	\
+	$(KRB5_CFLAGS)	\
+	$(AM_CFLAGS)
+
+test_identity_LDFLAGS = \
+	$(GSD_PLUGIN_LDFLAGS)
+
+test_identity_LDADD = \
+	$(top_builddir)/gnome-settings-daemon/libgsd.la		\
+	$(top_builddir)/plugins/common/libcommon.la			\
+	$(top_builddir)/plugins/media-keys/cut-n-paste/libgvc.la	\
+	$(SETTINGS_DAEMON_LIBS)			\
+	$(SETTINGS_PLUGIN_LIBS)	\
+	$(GCR_LIBS)	\
+	$(KRB5_LIBS)
+
+@GSD_INTLTOOL_PLUGIN_RULE@
+
+plugin_in_files = \
+	identity.gnome-settings-plugin.in
+
+plugin_DATA = $(plugin_in_files:.gnome-settings-plugin.in=.gnome-settings-plugin)
+
+EXTRA_DIST = \
+	$(plugin_in_files)
+
+CLEANFILES = \
+	$(plugin_DATA)
+
+DISTCLEANFILES = \
+	$(plugin_DATA)
diff --git a/plugins/identity/gsd-alarm.c b/plugins/identity/gsd-alarm.c
new file mode 100644
index 00000000..b8b0b7e5
--- /dev/null
+++ b/plugins/identity/gsd-alarm.c
@@ -0,0 +1,625 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Ray Strode
+ * Based on work by Colin Walters
+ */
+
+#include "config.h"
+
+#include "gsd-alarm.h"
+
+#ifdef HAVE_TIMERFD
+#include <sys/timerfd.h>
+#endif
+
+#include <unistd.h>
+#include <string.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+#include <gio/gunixinputstream.h>
+
+typedef struct {
+        GSource      *source;
+        GInputStream *stream;
+} Timer;
+
+typedef struct {
+        GSource *source;
+} Timeout;
+
+#define MAX_TIMEOUT_INTERVAL (10 * 1000)
+
+typedef enum {
+    GSD_ALARM_TYPE_UNSCHEDULED,
+    GSD_ALARM_TYPE_TIMER,
+    GSD_ALARM_TYPE_TIMEOUT,
+} GsdAlarmType;
+
+struct _GsdAlarmPrivate
+{
+        GCancellable *cancellable;
+        gulong        cancelled_id;
+        GDateTime    *time;
+        GDateTime    *previous_wakeup_time;
+        GMainContext *context;
+        GSource      *immediate_wakeup_source;
+        GRecMutex     lock;
+
+        GsdAlarmType type;
+        union {
+                Timer   timer;
+                Timeout timeout;
+        };
+};
+
+enum {
+        FIRED,
+        REARMED,
+        NUMBER_OF_SIGNALS,
+};
+
+enum {
+        PROP_0,
+        PROP_TIME
+};
+
+static void schedule_wakeups (GsdAlarm *self);
+static void schedule_wakeups_with_timeout_source (GsdAlarm *self);
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+G_DEFINE_TYPE (GsdAlarm, gsd_alarm, G_TYPE_OBJECT);
+
+static void
+clear_scheduled_immediate_wakeup (GsdAlarm *self)
+{
+        g_clear_pointer (&self->priv->immediate_wakeup_source,
+                         (GDestroyNotify)
+                         g_source_destroy);
+}
+
+static void
+clear_scheduled_timer_wakeups (GsdAlarm *self)
+{
+#ifdef HAVE_TIMERFD
+        GError *error;
+        gboolean is_closed;
+
+        g_clear_pointer (&self->priv->timer.source,
+                         (GDestroyNotify)
+                         g_source_destroy);
+
+        error = NULL;
+        is_closed = g_input_stream_close (self->priv->timer.stream,
+                                          NULL,
+                                          &error);
+
+        if (!is_closed) {
+                g_warning ("GsdAlarm: could not close timer stream: %s",
+                           error->message);
+                g_error_free (error);
+        }
+
+        g_clear_object (&self->priv->timer.stream);
+#endif
+}
+
+static void
+clear_scheduled_timeout_wakeups (GsdAlarm *self)
+{
+        g_clear_pointer (&self->priv->timeout.source,
+                         (GDestroyNotify)
+                         g_source_destroy);
+}
+
+static void
+clear_scheduled_wakeups (GsdAlarm *self)
+{
+        g_rec_mutex_lock (&self->priv->lock);
+        clear_scheduled_immediate_wakeup (self);
+
+        switch (self->priv->type) {
+                case GSD_ALARM_TYPE_TIMER:
+                        clear_scheduled_timer_wakeups (self);
+                        break;
+
+                case GSD_ALARM_TYPE_TIMEOUT:
+                        clear_scheduled_timeout_wakeups (self);
+                        break;
+
+                default:
+                        break;
+        }
+
+        g_clear_object (&self->priv->cancellable);
+
+        g_clear_pointer (&self->priv->context,
+                         (GDestroyNotify)
+                         g_main_context_unref);
+
+        g_clear_pointer (&self->priv->previous_wakeup_time,
+                         (GDestroyNotify)
+                         g_date_time_unref);
+
+        g_clear_pointer (&self->priv->time,
+                         (GDestroyNotify)
+                         g_date_time_unref);
+
+        g_assert (self->priv->timeout.source == NULL);
+
+        self->priv->type = GSD_ALARM_TYPE_UNSCHEDULED;
+        g_rec_mutex_unlock (&self->priv->lock);
+}
+
+static void
+gsd_alarm_finalize (GObject *object)
+{
+        GsdAlarm *self = GSD_ALARM (object);
+
+        clear_scheduled_wakeups (self);
+
+        G_OBJECT_CLASS (gsd_alarm_parent_class)->finalize (object);
+}
+
+static void
+gsd_alarm_set_property (GObject      *object,
+                        guint         property_id,
+                        const GValue *value,
+                        GParamSpec   *param_spec)
+{
+        GsdAlarm *self = GSD_ALARM (object);
+        GDateTime *time;
+
+        switch (property_id) {
+                case PROP_TIME:
+                        time = (GDateTime *) g_value_get_boxed (value);
+                        gsd_alarm_set_time (self, time, self->priv->cancellable);
+                        break;
+                default:
+                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
+                                                           property_id,
+                                                           param_spec);
+                        break;
+        }
+}
+
+static void
+gsd_alarm_get_property (GObject    *object,
+                        guint       property_id,
+                        GValue     *value,
+                        GParamSpec *param_spec)
+{
+        GsdAlarm *self = GSD_ALARM (object);
+
+        switch (property_id) {
+                case PROP_TIME:
+                        g_value_set_boxed (value, self->priv->time);
+                        break;
+                default:
+                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
+                                                           property_id,
+                                                           param_spec);
+                        break;
+        }
+}
+
+static void
+gsd_alarm_class_init (GsdAlarmClass *klass)
+{
+        GObjectClass *object_class;
+
+        object_class = G_OBJECT_CLASS (klass);
+
+        object_class->finalize = gsd_alarm_finalize;
+        object_class->get_property = gsd_alarm_get_property;
+        object_class->set_property = gsd_alarm_set_property;
+
+        g_type_class_add_private (klass, sizeof (GsdAlarmPrivate));
+
+        signals[FIRED] = g_signal_new ("fired",
+                                       G_TYPE_FROM_CLASS (klass),
+                                       G_SIGNAL_RUN_LAST,
+                                       0,
+                                       NULL, NULL, NULL,
+                                       G_TYPE_NONE, 0);
+
+        signals[REARMED] = g_signal_new ("rearmed",
+                                         G_TYPE_FROM_CLASS (klass),
+                                         G_SIGNAL_RUN_LAST,
+                                         0,
+                                         NULL, NULL, NULL,
+                                         G_TYPE_NONE, 0);
+
+        g_object_class_install_property (object_class,
+                                         PROP_TIME,
+                                         g_param_spec_boxed ("time",
+                                                             _("Time"),
+                                                             _("Time to fire"),
+                                                             G_TYPE_DATE_TIME,
+                                                             G_PARAM_READWRITE));
+}
+
+static void
+gsd_alarm_init (GsdAlarm *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_ALARM,
+                                                  GsdAlarmPrivate);
+        self->priv->type = GSD_ALARM_TYPE_UNSCHEDULED;
+        g_rec_mutex_init (&self->priv->lock);
+}
+
+static void
+on_cancelled (GCancellable *cancellable,
+              gpointer      user_data)
+{
+        GsdAlarm *self = GSD_ALARM (user_data);
+
+        clear_scheduled_wakeups (self);
+}
+
+static void
+fire_alarm (GsdAlarm *self)
+{
+        g_signal_emit (G_OBJECT (self), signals[FIRED], 0);
+}
+
+static void
+rearm_alarm (GsdAlarm *self)
+{
+        g_signal_emit (G_OBJECT (self), signals[REARMED], 0);
+}
+
+static void
+fire_or_rearm_alarm (GsdAlarm *self)
+{
+        GTimeSpan  time_until_fire;
+        GTimeSpan  previous_time_until_fire;
+        GDateTime *now;
+
+        now = g_date_time_new_now_local ();
+        time_until_fire = g_date_time_difference (self->priv->time, now);
+
+        if (self->priv->previous_wakeup_time == NULL) {
+                self->priv->previous_wakeup_time = now;
+
+                /* If, according to the time, we're past when we should have fired,
+                 * then fire the alarm.
+                 */
+                if (time_until_fire <= 0) {
+                        fire_alarm (self);
+                }
+        } else {
+                previous_time_until_fire = g_date_time_difference (self->priv->time,
+                                                                   self->priv->previous_wakeup_time);
+
+                g_date_time_unref (self->priv->previous_wakeup_time);
+                self->priv->previous_wakeup_time = now;
+
+                /* If, according to the time, we're past when we should have fired,
+                 * and this is the first wakeup where that's been true then fire
+                 * the alarm. The first check makes sure we don't fire prematurely,
+                 * and the second check makes sure we don't fire more than once
+                 */
+                if (time_until_fire <= 0 && previous_time_until_fire > 0) {
+                        fire_alarm (self);
+
+                /* If, according to the time, we're before when we should fire,
+                 * and we previously fired the alarm, then we've jumped back in
+                 * time and need to rearm the alarm.
+                 */
+                } else if (time_until_fire > 0 && previous_time_until_fire <= 0) {
+                        rearm_alarm (self);
+                }
+        }
+}
+
+static gboolean
+on_immediate_wakeup_source_ready (GsdAlarm *self)
+{
+        g_return_val_if_fail (self->priv->type != GSD_ALARM_TYPE_UNSCHEDULED, FALSE);
+
+        g_rec_mutex_lock (&self->priv->lock);
+        if (g_cancellable_is_cancelled (self->priv->cancellable)) {
+                goto out;
+        }
+
+        fire_or_rearm_alarm (self);
+
+out:
+        g_rec_mutex_unlock (&self->priv->lock);
+        return FALSE;
+}
+
+#ifdef HAVE_TIMERFD
+static gboolean
+on_timer_source_ready (GObject  *stream,
+                       GsdAlarm *self)
+{
+        gint64 number_of_fires;
+        gssize bytes_read;
+        gboolean run_again = FALSE;
+
+        g_return_val_if_fail (GSD_IS_ALARM (self), FALSE);
+        g_return_val_if_fail (self->priv->type == GSD_ALARM_TYPE_TIMER, FALSE);
+
+        g_rec_mutex_lock (&self->priv->lock);
+        if (g_cancellable_is_cancelled (self->priv->cancellable)) {
+                goto out;
+        }
+
+        bytes_read = g_pollable_input_stream_read_nonblocking (G_POLLABLE_INPUT_STREAM (stream),
+                                                               &number_of_fires,
+                                                               sizeof (gint64),
+                                                               NULL,
+                                                               NULL);
+
+        if (bytes_read == sizeof (gint64)) {
+                if (number_of_fires < 0 || number_of_fires > 1) {
+                        g_warning ("GsdAlarm: expected timerfd to report firing once,"
+                                   "but it reported firing %ld times\n",
+                                   (long) number_of_fires);
+                }
+        }
+
+        fire_or_rearm_alarm (self);
+        run_again = TRUE;
+out:
+        g_rec_mutex_unlock (&self->priv->lock);
+        return run_again;
+}
+
+static void
+clear_timer_source_pointer (GsdAlarm *self)
+{
+        self->priv->timer.source = NULL;
+}
+#endif
+
+static gboolean
+schedule_wakeups_with_timerfd (GsdAlarm *self)
+{
+#ifdef HAVE_TIMERFD
+        struct itimerspec timer_spec;
+        int fd;
+        int result;
+        static gboolean seen_before = FALSE;
+
+        if (!seen_before) {
+                g_debug ("GsdAlarm: trying to use kernel timer");
+                seen_before = TRUE;
+        }
+
+        fd = timerfd_create (CLOCK_REALTIME, TFD_CLOEXEC | TFD_NONBLOCK);
+
+        if (fd < 0) {
+                g_debug ("GsdAlarm: could not create timer fd: %m");
+                return FALSE;
+        }
+
+        memset (&timer_spec, 0, sizeof (timer_spec));
+        timer_spec.it_value.tv_sec = g_date_time_to_unix (self->priv->time) + 1;
+
+        result = timerfd_settime (fd,
+                                  TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET,
+                                  &timer_spec,
+                                  NULL);
+
+        if (result < 0) {
+                g_debug ("GsdAlarm: could not set timer: %m");
+                return FALSE;
+        }
+
+        self->priv->type = GSD_ALARM_TYPE_TIMER;
+        self->priv->timer.stream = g_unix_input_stream_new (fd, TRUE);
+
+        self->priv->timer.source = g_pollable_input_stream_create_source (G_POLLABLE_INPUT_STREAM (self->priv->timer.stream),
+                                                                          self->priv->cancellable);
+        g_source_set_callback (self->priv->timer.source,
+                               (GSourceFunc)
+                               on_timer_source_ready,
+                               self,
+                               (GDestroyNotify)
+                               clear_timer_source_pointer);
+        g_source_attach (self->priv->timer.source,
+                         self->priv->context);
+        g_source_unref (self->priv->timer.source);
+
+        return TRUE;
+
+#endif /* HAVE_TIMERFD */
+
+    return FALSE;
+}
+
+static gboolean
+on_timeout_source_ready (GsdAlarm *self)
+{
+        g_return_val_if_fail (GSD_IS_ALARM (self), FALSE);
+
+        g_rec_mutex_lock (&self->priv->lock);
+
+        if (g_cancellable_is_cancelled (self->priv->cancellable) ||
+            self->priv->type == GSD_ALARM_TYPE_UNSCHEDULED) {
+                goto out;
+        }
+
+        fire_or_rearm_alarm (self);
+
+        if (g_cancellable_is_cancelled (self->priv->cancellable)) {
+                goto out;
+        }
+
+        schedule_wakeups_with_timeout_source (self);
+
+out:
+        g_rec_mutex_unlock (&self->priv->lock);
+        return FALSE;
+}
+
+static void
+clear_timeout_source_pointer (GsdAlarm *self)
+{
+        self->priv->timeout.source = NULL;
+}
+
+static void
+schedule_wakeups_with_timeout_source (GsdAlarm *self)
+{
+        GDateTime *now;
+        GTimeSpan time_span;
+        guint interval;
+
+        self->priv->type = GSD_ALARM_TYPE_TIMEOUT;
+
+        now = g_date_time_new_now_local ();
+        time_span = g_date_time_difference (self->priv->time, now);
+        g_date_time_unref (now);
+
+        time_span = CLAMP (time_span, 1000 * G_TIME_SPAN_MILLISECOND, G_MAXUINT * G_TIME_SPAN_MILLISECOND);
+        interval = (guint) time_span / G_TIME_SPAN_MILLISECOND;
+
+        /* We poll every 10 seconds or so because we want to catch time skew
+         */
+        interval = MIN (interval, MAX_TIMEOUT_INTERVAL);
+
+        self->priv->timeout.source = g_timeout_source_new (interval);
+        g_source_set_callback (self->priv->timeout.source,
+                               (GSourceFunc)
+                               on_timeout_source_ready,
+                               self,
+                               (GDestroyNotify)
+                               clear_timeout_source_pointer);
+
+        g_source_attach (self->priv->timeout.source,
+                         self->priv->context);
+        g_source_unref (self->priv->timeout.source);
+}
+
+static void
+schedule_wakeups (GsdAlarm *self)
+{
+        gboolean wakeup_scheduled;
+
+        wakeup_scheduled = schedule_wakeups_with_timerfd (self);
+
+        if (!wakeup_scheduled) {
+                static gboolean seen_before = FALSE;
+
+                if (!seen_before) {
+                        g_debug ("GsdAlarm: falling back to polling timeout");
+                        seen_before = TRUE;
+                }
+                schedule_wakeups_with_timeout_source (self);
+        }
+}
+
+static void
+clear_immediate_wakeup_source_pointer (GsdAlarm *self)
+{
+        self->priv->immediate_wakeup_source = NULL;
+}
+
+static void
+schedule_immediate_wakeup (GsdAlarm *self)
+{
+        self->priv->immediate_wakeup_source = g_idle_source_new ();
+
+        g_source_set_callback (self->priv->immediate_wakeup_source,
+                               (GSourceFunc)
+                               on_immediate_wakeup_source_ready,
+                               self,
+                               (GDestroyNotify)
+                               clear_immediate_wakeup_source_pointer);
+        g_source_attach (self->priv->immediate_wakeup_source,
+                         self->priv->context);
+        g_source_unref (self->priv->immediate_wakeup_source);
+}
+
+void
+gsd_alarm_set_time (GsdAlarm     *self,
+                    GDateTime    *time,
+                    GCancellable *cancellable)
+{
+        if (g_cancellable_is_cancelled (cancellable)) {
+                return;
+        }
+
+        if (self->priv->cancellable != NULL &&
+            self->priv->cancellable != cancellable) {
+                g_cancellable_cancel (self->priv->cancellable);
+        }
+
+        if (cancellable != NULL) {
+                g_object_ref (cancellable);
+        }
+
+        if (self->priv->cancelled_id != 0) {
+                g_cancellable_disconnect (self->priv->cancellable,
+                                          self->priv->cancelled_id);
+        }
+
+        g_clear_object (&self->priv->cancellable);
+
+        if (cancellable != NULL) {
+                self->priv->cancellable = cancellable;
+        } else {
+                self->priv->cancellable = g_cancellable_new ();
+        }
+
+        self->priv->cancelled_id = g_cancellable_connect (self->priv->cancellable,
+                                                          G_CALLBACK (on_cancelled),
+                                                          self,
+                                                          NULL);
+
+        g_date_time_ref (time);
+
+        if (self->priv->time != NULL) {
+                g_date_time_unref (self->priv->time);
+        }
+
+        self->priv->time = time;
+
+        self->priv->context = g_main_context_ref (g_main_context_default ());
+
+        g_object_notify (G_OBJECT (self), "time");
+
+        schedule_wakeups (self);
+
+        /* Wake up right away, in case it's already expired leaving the gate */
+        schedule_immediate_wakeup (self);
+}
+
+GDateTime *
+gsd_alarm_get_time (GsdAlarm *self)
+{
+        return self->priv->time;
+}
+
+GsdAlarm *
+gsd_alarm_new (void)
+{
+        GsdAlarm *self;
+
+        self = GSD_ALARM (g_object_new (GSD_TYPE_ALARM, NULL));
+
+        return GSD_ALARM (self);
+}
diff --git a/plugins/identity/gsd-alarm.h b/plugins/identity/gsd-alarm.h
new file mode 100644
index 00000000..da17d4ca
--- /dev/null
+++ b/plugins/identity/gsd-alarm.h
@@ -0,0 +1,67 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_ALARM_H__
+#define __GSD_ALARM_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_ALARM             (gsd_alarm_get_type ())
+#define GSD_ALARM(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_ALARM, GsdAlarm))
+#define GSD_ALARM_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_ALARM, GsdAlarmClass))
+#define GSD_IS_ALARM(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_ALARM))
+#define GSD_IS_ALARM_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GSD_TYPE_ALARM))
+#define GSD_ALARM_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), GSD_TYPE_ALARM, GsdAlarmClass))
+
+typedef struct _GsdAlarm        GsdAlarm;
+typedef struct _GsdAlarmClass   GsdAlarmClass;
+typedef struct _GsdAlarmPrivate GsdAlarmPrivate;
+
+struct _GsdAlarm
+{
+        GObject parent;
+
+        GsdAlarmPrivate *priv;
+};
+
+struct _GsdAlarmClass
+{
+        GObjectClass parent_class;
+
+        void     (* fired)       (GsdAlarm *alarm);
+        void     (* rearmed)     (GsdAlarm *alarm);
+};
+
+GType         gsd_alarm_get_type (void);
+
+GsdAlarm     *gsd_alarm_new      (void);
+void          gsd_alarm_set_time (GsdAlarm     *alarm,
+                                  GDateTime    *time,
+                                  GCancellable *cancellable);
+GDateTime    *gsd_alarm_get_time (GsdAlarm     *alarm);
+G_END_DECLS
+
+#endif /* __GSD_ALARM_H__ */
diff --git a/plugins/identity/gsd-identity-enum-types.c.in b/plugins/identity/gsd-identity-enum-types.c.in
new file mode 100644
index 00000000..c0286907
--- /dev/null
+++ b/plugins/identity/gsd-identity-enum-types.c.in
@@ -0,0 +1,42 @@
+/*** BEGIN file-header ***/
+
+#include <glib-object.h>
+
+/*** END file-header ***/
+
+/*** BEGIN file-production ***/
+#include "@filename@"
+/* enumerations from "@filename@" */
+/*** END file-production ***/
+
+/*** BEGIN value-header ***/
+GType @enum_name@_get_type (void) G_GNUC_CONST;
+
+GType
+@enum_name@_get_type (void)
+{
+        static GType etype = 0;
+
+        if (G_UNLIKELY(etype == 0)) {
+                static const G@Type@Value values[] = {
+/*** END value-header ***/
+
+/*** BEGIN value-production ***/
+                { @VALUENAME@, "@VALUENAME@", "@valuenick@" },
+/*** END value-production ***/
+
+/*** BEGIN value-tail ***/
+                { 0, NULL, NULL }
+        };
+
+        etype = g_@type@_register_static (g_intern_static_string ("@EnumName@"), values);
+    }
+
+    return etype;
+}
+
+/*** END value-tail ***/
+
+/*** BEGIN file-tail ***/
+ /**/
+/*** END file-tail ***/
diff --git a/plugins/identity/gsd-identity-enum-types.h.in b/plugins/identity/gsd-identity-enum-types.h.in
new file mode 100644
index 00000000..79dcc3d8
--- /dev/null
+++ b/plugins/identity/gsd-identity-enum-types.h.in
@@ -0,0 +1,24 @@
+/*** BEGIN file-header ***/
+#ifndef GSD_IDENTITY_ENUM_TYPES_H
+#define GSD_IDENTITY_ENUM_TYPES_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+/*** END file-header ***/
+
+/*** BEGIN file-production ***/
+
+/* enumerations from "@filename@" */
+/*** END file-production ***/
+
+/*** BEGIN value-header ***/
+GType @enum_name@_get_type (void) G_GNUC_CONST;
+#define @ENUMPREFIX@_TYPE_@ENUMSHORT@ (@enum_name@_get_type ())
+/*** END value-header ***/
+
+/*** BEGIN file-tail ***/
+G_END_DECLS
+
+#endif /* GSD_IDENTITY_ENUM_TYPES_H */
+/*** END file-tail ***/
diff --git a/plugins/identity/gsd-identity-inquiry-private.h b/plugins/identity/gsd-identity-inquiry-private.h
new file mode 100644
index 00000000..e4df1bf1
--- /dev/null
+++ b/plugins/identity/gsd-identity-inquiry-private.h
@@ -0,0 +1,36 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_INQUIRY_PRIVATE_H__
+#define __GSD_IDENTITY_INQUIRY_PRIVATE_H__
+
+#include <glib.h>
+#include <glib-object.h>
+
+#include "gsd-identity-inquiry.h"
+
+G_BEGIN_DECLS
+
+void      _gsd_identity_inquiry_emit_complete (GsdIdentityInquiry *inquiry);
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_INQUIRY_PRIVATE_H__ */
diff --git a/plugins/identity/gsd-identity-inquiry.c b/plugins/identity/gsd-identity-inquiry.c
new file mode 100644
index 00000000..fa1646c0
--- /dev/null
+++ b/plugins/identity/gsd-identity-inquiry.c
@@ -0,0 +1,146 @@
+/* -*- Mode: C; tab-width: 8; ident-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-identity-inquiry.h"
+#include "gsd-identity-inquiry-private.h"
+
+#include <string.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+
+enum {
+        COMPLETE,
+        NUMBER_OF_SIGNALS,
+};
+
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+G_DEFINE_INTERFACE (GsdIdentityInquiry,
+                    gsd_identity_inquiry,
+                    G_TYPE_OBJECT);
+
+static void
+gsd_identity_inquiry_default_init (GsdIdentityInquiryInterface *interface)
+{
+        signals[COMPLETE] = g_signal_new ("complete",
+                                          G_TYPE_FROM_INTERFACE (interface),
+                                          G_SIGNAL_RUN_LAST,
+                                          0,
+                                          NULL, NULL, NULL,
+                                          G_TYPE_NONE, 0);
+}
+
+void
+_gsd_identity_inquiry_emit_complete (GsdIdentityInquiry *self)
+{
+        g_signal_emit (G_OBJECT (self), signals[COMPLETE], 0);
+}
+
+char *
+gsd_identity_inquiry_get_name (GsdIdentityInquiry *self)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), NULL);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->get_name (self);
+}
+
+char *
+gsd_identity_inquiry_get_banner (GsdIdentityInquiry *self)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), NULL);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->get_banner (self);
+}
+
+gboolean
+gsd_identity_inquiry_is_complete (GsdIdentityInquiry *self)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), TRUE);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->is_complete (self);
+}
+
+void
+gsd_identity_inquiry_iter_init (GsdIdentityInquiryIter *iter,
+                                GsdIdentityInquiry     *inquiry)
+{
+        g_return_if_fail (GSD_IS_IDENTITY_INQUIRY (inquiry));
+
+        GSD_IDENTITY_INQUIRY_GET_IFACE (inquiry)->iter_init (iter, inquiry);
+}
+
+GsdIdentityQuery *
+gsd_identity_inquiry_iter_next (GsdIdentityInquiryIter *iter,
+                                GsdIdentityInquiry     *inquiry)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (inquiry), NULL);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (inquiry)->iter_next (iter, inquiry);
+}
+
+GsdIdentity *
+gsd_identity_inquiry_get_identity (GsdIdentityInquiry *self)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), NULL);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->get_identity (self);
+}
+
+GsdIdentityQueryMode
+gsd_identity_query_get_mode (GsdIdentityInquiry *self,
+                             GsdIdentityQuery   *query)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self),
+                              GSD_IDENTITY_QUERY_MODE_INVISIBLE);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->get_mode (self, query);
+}
+
+char *
+gsd_identity_query_get_prompt (GsdIdentityInquiry *self,
+                               GsdIdentityQuery   *query)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), NULL);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->get_prompt (self, query);
+}
+
+void
+gsd_identity_inquiry_answer_query (GsdIdentityInquiry *self,
+                                   GsdIdentityQuery   *query,
+                                   const char         *answer)
+{
+        g_return_if_fail (GSD_IS_IDENTITY_INQUIRY (self));
+
+        GSD_IDENTITY_INQUIRY_GET_IFACE (self)->answer_query (self, query, answer);
+}
+
+gboolean
+gsd_identity_query_is_answered (GsdIdentityInquiry *self,
+                                GsdIdentityQuery   *query)
+{
+        g_return_val_if_fail (GSD_IS_IDENTITY_INQUIRY (self), FALSE);
+
+        return GSD_IDENTITY_INQUIRY_GET_IFACE (self)->is_answered (self, query);
+}
diff --git a/plugins/identity/gsd-identity-inquiry.h b/plugins/identity/gsd-identity-inquiry.h
new file mode 100644
index 00000000..771ec10c
--- /dev/null
+++ b/plugins/identity/gsd-identity-inquiry.h
@@ -0,0 +1,108 @@
+/* -*- Mode: C; tab-width: 8; ident-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_INQUIRY_H__
+#define __GSD_IDENTITY_INQUIRY_H__
+
+#include <stdint.h>
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include "gsd-identity.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY_INQUIRY             (gsd_identity_inquiry_get_type ())
+#define GSD_IDENTITY_INQUIRY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_IDENTITY_INQUIRY, GsdIdentityInquiry))
+#define GSD_IDENTITY_INQUIRY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_IDENTITY_INQUIRY, GsdIdentityInquiryClass))
+#define GSD_IS_IDENTITY_INQUIRY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_IDENTITY_INQUIRY))
+#define GSD_IDENTITY_INQUIRY_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE((obj), GSD_TYPE_IDENTITY_INQUIRY, GsdIdentityInquiryInterface))
+typedef struct _GsdIdentityInquiry            GsdIdentityInquiry;
+typedef struct _GsdIdentityInquiryInterface   GsdIdentityInquiryInterface;
+typedef struct _GsdIdentityInquiryIter        GsdIdentityInquiryIter;
+
+typedef struct _GsdIdentityQuery GsdIdentityQuery;
+
+typedef void (* GsdIdentityInquiryFunc) (GsdIdentityInquiry *inquiry,
+                                         GCancellable       *cancellable,
+                                         gpointer            user_data);
+
+typedef enum
+{
+        GSD_IDENTITY_QUERY_MODE_INVISIBLE,
+        GSD_IDENTITY_QUERY_MODE_VISIBLE
+} GsdIdentityQueryMode;
+
+struct _GsdIdentityInquiryIter
+{
+        gpointer data;
+};
+
+struct _GsdIdentityInquiryInterface
+{
+        GTypeInterface base_interface;
+
+        GsdIdentity * (* get_identity)  (GsdIdentityInquiry *inquiry);
+        char *        (* get_name)      (GsdIdentityInquiry *inquiry);
+        char *        (* get_banner)    (GsdIdentityInquiry *inquiry);
+        gboolean      (* is_complete)   (GsdIdentityInquiry *inquiry);
+        void          (* answer_query)  (GsdIdentityInquiry *inquiry,
+                                         GsdIdentityQuery   *query,
+                                         const char         *answer);
+
+        void               (* iter_init) (GsdIdentityInquiryIter *iter,
+                                          GsdIdentityInquiry     *inquiry);
+        GsdIdentityQuery * (* iter_next) (GsdIdentityInquiryIter *iter,
+                                          GsdIdentityInquiry     *inquiry);
+
+        GsdIdentityQueryMode (* get_mode)   (GsdIdentityInquiry *inquiry,
+                                             GsdIdentityQuery   *query);
+        char *               (* get_prompt) (GsdIdentityInquiry *inquiry,
+                                             GsdIdentityQuery   *query);
+        gboolean             (* is_answered) (GsdIdentityInquiry *inquiry,
+                                              GsdIdentityQuery   *query);
+};
+
+GType        gsd_identity_inquiry_get_type     (void);
+
+GsdIdentity *gsd_identity_inquiry_get_identity (GsdIdentityInquiry *inquiry);
+char        *gsd_identity_inquiry_get_name     (GsdIdentityInquiry *inquiry);
+char        *gsd_identity_inquiry_get_banner   (GsdIdentityInquiry *inquiry);
+gboolean     gsd_identity_inquiry_is_complete  (GsdIdentityInquiry *inquiry);
+void         gsd_identity_inquiry_answer_query (GsdIdentityInquiry *inquiry,
+                                                GsdIdentityQuery   *query,
+                                                const char         *answer);
+
+void              gsd_identity_inquiry_iter_init (GsdIdentityInquiryIter *iter,
+                                                  GsdIdentityInquiry     *inquiry);
+GsdIdentityQuery *gsd_identity_inquiry_iter_next (GsdIdentityInquiryIter *iter, GsdIdentityInquiry     *inquiry);
+
+GsdIdentityQueryMode  gsd_identity_query_get_mode    (GsdIdentityInquiry *inquiry,
+                                                      GsdIdentityQuery   *query);
+char                 *gsd_identity_query_get_prompt  (GsdIdentityInquiry *inquiry,
+                                                      GsdIdentityQuery   *query);
+gboolean              gsd_identity_query_is_answered (GsdIdentityInquiry *inquiry,
+                                                      GsdIdentityQuery   *query);
+
+#endif /* __GSD_IDENTITY_INQUIRY_H__ */
diff --git a/plugins/identity/gsd-identity-manager-private.h b/plugins/identity/gsd-identity-manager-private.h
new file mode 100644
index 00000000..13b85127
--- /dev/null
+++ b/plugins/identity/gsd-identity-manager-private.h
@@ -0,0 +1,51 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_MANAGER_PRIVATE_H__
+#define __GSD_IDENTITY_MANAGER_PRIVATE_H__
+
+#include <glib.h>
+#include <glib-object.h>
+
+#include "gsd-identity-manager.h"
+
+G_BEGIN_DECLS
+
+void      _gsd_identity_manager_emit_identity_added (GsdIdentityManager *identity_manager,
+                                                     GsdIdentity        *identity);
+void      _gsd_identity_manager_emit_identity_removed (GsdIdentityManager *identity_manager,
+                                                       GsdIdentity        *identity);
+void      _gsd_identity_manager_emit_identity_refreshed (GsdIdentityManager *identity_manager,
+                                                         GsdIdentity        *identity);
+void      _gsd_identity_manager_emit_identity_renamed (GsdIdentityManager *identity_manager,
+                                                       GsdIdentity        *identity);
+
+void      _gsd_identity_manager_emit_identity_expiring (GsdIdentityManager *self,
+                                                        GsdIdentity        *identity);
+
+void      _gsd_identity_manager_emit_identity_needs_renewal (GsdIdentityManager *identity_manager,
+                                                             GsdIdentity        *identity);
+void      _gsd_identity_manager_emit_identity_expired (GsdIdentityManager *identity_manager,
+                                                       GsdIdentity        *identity);
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_MANAGER_PRIVATE_H__ */
diff --git a/plugins/identity/gsd-identity-manager.c b/plugins/identity/gsd-identity-manager.c
new file mode 100644
index 00000000..be6c6a9c
--- /dev/null
+++ b/plugins/identity/gsd-identity-manager.c
@@ -0,0 +1,260 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+
+#include "gsd-identity-manager.h"
+#include "gsd-identity-manager-private.h"
+
+enum {
+        IDENTITY_ADDED,
+        IDENTITY_REMOVED,
+        IDENTITY_RENAMED,
+        IDENTITY_REFRESHED,
+        IDENTITY_NEEDS_RENEWAL,
+        IDENTITY_EXPIRING,
+        IDENTITY_EXPIRED,
+        NUMBER_OF_SIGNALS,
+};
+
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+G_DEFINE_INTERFACE (GsdIdentityManager, gsd_identity_manager, G_TYPE_OBJECT);
+
+static void
+gsd_identity_manager_default_init (GsdIdentityManagerInterface *interface)
+{
+        signals[IDENTITY_ADDED] = g_signal_new ("identity-added",
+                                                G_TYPE_FROM_INTERFACE (interface),
+                                                G_SIGNAL_RUN_LAST,
+                                                G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_added),
+                                                NULL, NULL, NULL,
+                                                G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_REMOVED] = g_signal_new ("identity-removed",
+                                                  G_TYPE_FROM_INTERFACE (interface),
+                                                  G_SIGNAL_RUN_LAST,
+                                                  G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_removed),
+                                                  NULL, NULL, NULL,
+                                                  G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_REFRESHED] = g_signal_new ("identity-refreshed",
+                                                    G_TYPE_FROM_INTERFACE (interface),
+                                                    G_SIGNAL_RUN_LAST,
+                                                    G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_refreshed),
+                                                    NULL, NULL, NULL,
+                                                    G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_RENAMED] = g_signal_new ("identity-renamed",
+                                                  G_TYPE_FROM_INTERFACE (interface),
+                                                  G_SIGNAL_RUN_LAST,
+                                                  G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_renamed),
+                                                  NULL, NULL, NULL,
+                                                  G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_NEEDS_RENEWAL] = g_signal_new ("identity-needs-renewal",
+                                                        G_TYPE_FROM_INTERFACE (interface),
+                                                        G_SIGNAL_RUN_LAST,
+                                                        G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_needs_renewal),
+                                                        NULL, NULL, NULL,
+                                                        G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_EXPIRING] = g_signal_new ("identity-expiring",
+                                                   G_TYPE_FROM_INTERFACE (interface),
+                                                   G_SIGNAL_RUN_LAST,
+                                                   G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_expiring),
+                                                   NULL, NULL, NULL,
+                                                   G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+        signals[IDENTITY_EXPIRED] = g_signal_new ("identity-expired",
+                                                  G_TYPE_FROM_INTERFACE (interface),
+                                                  G_SIGNAL_RUN_LAST,
+                                                  G_STRUCT_OFFSET (GsdIdentityManagerInterface, identity_expired),
+                                                  NULL, NULL, NULL,
+                                                  G_TYPE_NONE, 1, GSD_TYPE_IDENTITY);
+}
+
+GQuark
+gsd_identity_manager_error_quark (void)
+{
+        static GQuark error_quark = 0;
+
+        if (error_quark == 0) {
+                error_quark = g_quark_from_static_string ("gsd-identity-manager-error");
+        }
+
+        return error_quark;
+}
+
+void
+gsd_identity_manager_get_identity (GsdIdentityManager   *self,
+                                   const char           *identifier,
+                                   GCancellable         *cancellable,
+                                   GAsyncReadyCallback   callback,
+                                   gpointer              user_data)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->get_identity (self,
+                                                             identifier,
+                                                             cancellable,
+                                                             callback,
+                                                             user_data);
+}
+
+GsdIdentity *
+gsd_identity_manager_get_identity_finish (GsdIdentityManager   *self,
+                                          GAsyncResult         *result,
+                                          GError              **error)
+{
+        return GSD_IDENTITY_MANAGER_GET_IFACE (self)->get_identity_finish (self, result, error);
+}
+
+void
+gsd_identity_manager_list_identities (GsdIdentityManager   *self,
+                                      GCancellable         *cancellable,
+                                      GAsyncReadyCallback   callback,
+                                      gpointer              user_data)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->list_identities (self,
+                                                               cancellable,
+                                                               callback,
+                                                               user_data);
+}
+
+GList *
+gsd_identity_manager_list_identities_finish (GsdIdentityManager  *self,
+                                             GAsyncResult        *result,
+                                             GError             **error)
+{
+        return GSD_IDENTITY_MANAGER_GET_IFACE (self)->list_identities_finish (self,
+                                                                             result,
+                                                                             error);
+}
+
+void
+gsd_identity_manager_renew_identity (GsdIdentityManager   *self,
+                                     GsdIdentity          *identity,
+                                     GCancellable         *cancellable,
+                                     GAsyncReadyCallback   callback,
+                                     gpointer              user_data)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->renew_identity (self, identity, cancellable, callback, user_data);
+}
+
+void
+gsd_identity_manager_renew_identity_finish (GsdIdentityManager  *self,
+                                            GAsyncResult        *result,
+                                            GError             **error)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->renew_identity_finish (self, result, error);
+}
+
+void
+gsd_identity_manager_sign_identity_in (GsdIdentityManager     *self,
+                                       const char             *identifier,
+                                       GsdIdentityInquiryFunc  inquiry_func,
+                                       gpointer                inquiry_data,
+                                       GCancellable           *cancellable,
+                                       GAsyncReadyCallback     callback,
+                                       gpointer                user_data)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->sign_identity_in (self, identifier, inquiry_func, inquiry_data, cancellable, callback, user_data);
+}
+
+GsdIdentity *
+gsd_identity_manager_sign_identity_in_finish (GsdIdentityManager  *self,
+                                              GAsyncResult        *result,
+                                              GError             **error)
+{
+        return GSD_IDENTITY_MANAGER_GET_IFACE (self)->sign_identity_in_finish (self, result, error);
+}
+
+void
+gsd_identity_manager_sign_identity_out (GsdIdentityManager   *self,
+                                        GsdIdentity          *identity,
+                                        GCancellable         *cancellable,
+                                        GAsyncReadyCallback   callback,
+                                        gpointer              user_data)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->sign_identity_out (self, identity, cancellable, callback, user_data);
+}
+
+void
+gsd_identity_manager_sign_identity_out_finish (GsdIdentityManager  *self,
+                                               GAsyncResult        *result,
+                                               GError             **error)
+{
+        GSD_IDENTITY_MANAGER_GET_IFACE (self)->sign_identity_out_finish (self, result, error);
+}
+
+char *
+gsd_identity_manager_name_identity (GsdIdentityManager *self,
+                                    GsdIdentity        *identity)
+{
+        return GSD_IDENTITY_MANAGER_GET_IFACE (self)->name_identity (self,
+                                                                     identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_added (GsdIdentityManager *self,
+                                           GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_ADDED], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_removed (GsdIdentityManager *self,
+                                             GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_REMOVED], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_renamed (GsdIdentityManager *self,
+                                             GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_RENAMED], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_refreshed (GsdIdentityManager *self,
+                                               GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_REFRESHED], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_needs_renewal (GsdIdentityManager *self,
+                                                   GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_NEEDS_RENEWAL], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_expiring (GsdIdentityManager *self,
+                                              GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_EXPIRING], 0, identity);
+}
+
+void
+_gsd_identity_manager_emit_identity_expired (GsdIdentityManager *self,
+                                             GsdIdentity        *identity)
+{
+        g_signal_emit (G_OBJECT (self), signals[IDENTITY_EXPIRED], 0, identity);
+}
+
diff --git a/plugins/identity/gsd-identity-manager.h b/plugins/identity/gsd-identity-manager.h
new file mode 100644
index 00000000..56677d93
--- /dev/null
+++ b/plugins/identity/gsd-identity-manager.h
@@ -0,0 +1,178 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_MANAGER_H__
+#define __GSD_IDENTITY_MANAGER_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include "gsd-identity.h"
+#include "gsd-identity-inquiry.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY_MANAGER             (gsd_identity_manager_get_type ())
+#define GSD_IDENTITY_MANAGER(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_IDENTITY_MANAGER, GsdIdentityManager))
+#define GSD_IDENTITY_MANAGER_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_IDENTITY_MANAGER, GsdIdentityManagerInterface))
+#define GSD_IS_IDENTITY_MANAGER(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_IDENTITY_MANAGER))
+#define GSD_IDENTITY_MANAGER_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE((obj), GSD_TYPE_IDENTITY_MANAGER, GsdIdentityManagerInterface))
+#define GSD_IDENTITY_MANAGER_ERROR            (gsd_identity_manager_error_quark ())
+
+typedef struct _GsdIdentityManager          GsdIdentityManager;
+typedef struct _GsdIdentityManagerInterface GsdIdentityManagerInterface;
+
+struct _GsdIdentityManagerInterface
+{
+        GTypeInterface base_interface;
+
+        /* Signals */
+        void      (* identity_added)    (GsdIdentityManager *identity_manager,
+                                         GsdIdentity        *identity);
+
+        void      (* identity_removed)  (GsdIdentityManager *identity_manager,
+                                         GsdIdentity        *identity);
+        void      (* identity_renamed)  (GsdIdentityManager *identity_manager,
+                                         GsdIdentity        *identity);
+        void      (* identity_refreshed)  (GsdIdentityManager *identity_manager,
+                                           GsdIdentity        *identity);
+        void      (* identity_needs_renewal)  (GsdIdentityManager *identity_manager,
+                                               GsdIdentity        *identity);
+        void      (* identity_expiring) (GsdIdentityManager *identity_manager,
+                                         GsdIdentity        *identity);
+        void      (* identity_expired)  (GsdIdentityManager *identity_manager,
+                                         GsdIdentity        *identity);
+
+        /* Virtual Functions */
+        void      (* get_identity)         (GsdIdentityManager   *identity_manager,
+                                              const char           *identifier,
+                                              GCancellable         *cancellable,
+                                              GAsyncReadyCallback   callback,
+                                              gpointer              user_data);
+        GsdIdentity * (* get_identity_finish)  (GsdIdentityManager  *identity_manager,
+                                                GAsyncResult        *result,
+                                                GError             **error);
+        void      (* list_identities)        (GsdIdentityManager   *identity_manager,
+                                              GCancellable        *cancellable,
+                                              GAsyncReadyCallback  callback,
+                                              gpointer             user_data);
+        GList *   (* list_identities_finish) (GsdIdentityManager  *identity_manager,
+                                              GAsyncResult       *result,
+                                              GError            **error);
+
+        void      (* sign_identity_in)  (GsdIdentityManager     *identity_manager,
+                                         const char             *identifier,
+                                         GsdIdentityInquiryFunc  inquiry_func,
+                                         gpointer                inquiry_data,
+                                         GCancellable           *cancellable,
+                                         GAsyncReadyCallback     callback,
+                                         gpointer                user_data);
+        GsdIdentity * (* sign_identity_in_finish)  (GsdIdentityManager  *identity_manager,
+                                                    GAsyncResult       *result,
+                                                    GError            **error);
+
+        void      (* sign_identity_out)  (GsdIdentityManager   *identity_manager,
+                                          GsdIdentity          *identity,
+                                          GCancellable        *cancellable,
+                                          GAsyncReadyCallback  callback,
+                                          gpointer             user_data);
+        void      (* sign_identity_out_finish)  (GsdIdentityManager  *identity_manager,
+                                                 GAsyncResult       *result,
+                                                 GError            **error);
+
+        void      (* renew_identity)     (GsdIdentityManager   *identity_manager,
+                                          GsdIdentity          *identity,
+                                          GCancellable        *cancellable,
+                                          GAsyncReadyCallback  callback,
+                                          gpointer             user_data);
+        void      (* renew_identity_finish)  (GsdIdentityManager  *identity_manager,
+                                              GAsyncResult       *result,
+                                              GError            **error);
+
+        char  *   (* name_identity)      (GsdIdentityManager *identity_manager,
+                                          GsdIdentity        *identity);
+};
+
+typedef enum
+{
+        GSD_IDENTITY_MANAGER_ERROR_INITIALIZING,
+        GSD_IDENTITY_MANAGER_ERROR_IDENTITY_NOT_FOUND,
+        GSD_IDENTITY_MANAGER_ERROR_CREATING_IDENTITY,
+        GSD_IDENTITY_MANAGER_ERROR_ACCESSING_CREDENTIALS,
+        GSD_IDENTITY_MANAGER_ERROR_UNSUPPORTED_CREDENTIALS
+} GsdIdentityManagerError;
+
+GType      gsd_identity_manager_get_type         (void);
+GQuark     gsd_identity_manager_error_quark      (void);
+
+void       gsd_identity_manager_get_identity (GsdIdentityManager   *identity_manager,
+                                              const char           *identifier,
+                                              GCancellable         *cancellable,
+                                              GAsyncReadyCallback   callback,
+                                              gpointer              user_data);
+GsdIdentity *gsd_identity_manager_get_identity_finish (GsdIdentityManager   *identity_manager,
+                                                       GAsyncResult         *result,
+                                                       GError              **error);
+void       gsd_identity_manager_list_identities  (GsdIdentityManager   *identity_manager,
+                                                  GCancellable         *cancellable,
+                                                  GAsyncReadyCallback   callback,
+                                                  gpointer              user_data);
+GList *    gsd_identity_manager_list_identities_finish  (GsdIdentityManager  *identity_manager,
+                                                         GAsyncResult        *result,
+                                                         GError             **error);
+
+void       gsd_identity_manager_sign_identity_in    (GsdIdentityManager     *identity_manager,
+                                                     const char             *identifier,
+                                                     GsdIdentityInquiryFunc  inquiry_func,
+                                                     gpointer                inquiry_data,
+                                                     GCancellable           *cancellable,
+                                                     GAsyncReadyCallback     callback,
+                                                     gpointer                user_data);
+GsdIdentity * gsd_identity_manager_sign_identity_in_finish (GsdIdentityManager *identity_manager,
+                                                            GAsyncResult       *result,
+                                                            GError            **error);
+
+void       gsd_identity_manager_sign_identity_out    (GsdIdentityManager  *identity_manager,
+                                                      GsdIdentity         *identity,
+                                                      GCancellable        *cancellable,
+                                                      GAsyncReadyCallback  callback,
+                                                      gpointer             user_data);
+void       gsd_identity_manager_sign_identity_out_finish (GsdIdentityManager *identity_manager,
+                                                          GAsyncResult       *result,
+                                                          GError            **error);
+
+void       gsd_identity_manager_renew_identity (GsdIdentityManager   *identity_manager,
+                                                GsdIdentity          *identity,
+                                                GCancellable         *cancellable,
+                                                GAsyncReadyCallback   callback,
+                                                gpointer              user_data);
+void       gsd_identity_manager_renew_identity_finish (GsdIdentityManager *identity_manager,
+                                                       GAsyncResult       *result,
+                                                       GError            **error);
+
+char      *gsd_identity_manager_name_identity (GsdIdentityManager *identity_manager,
+                                               GsdIdentity        *identity);
+
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_MANAGER_H__ */
diff --git a/plugins/identity/gsd-identity-plugin.c b/plugins/identity/gsd-identity-plugin.c
new file mode 100644
index 00000000..ce457252
--- /dev/null
+++ b/plugins/identity/gsd-identity-plugin.c
@@ -0,0 +1,798 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <glib/gi18n-lib.h>
+#include <gmodule.h>
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include <libnotify/notify.h>
+#include <gcr/gcr.h>
+
+#include "gnome-settings-plugin.h"
+#include "gsd-identity-plugin.h"
+
+#include "gsd-kerberos-identity-manager.h"
+#include "gsd-identity-service.h"
+
+struct GsdIdentityPluginPrivate {
+        GsdIdentityManager *identity_manager;
+        GsdIdentityService *identity_service;
+        guint               bus_id;
+};
+
+#define GSD_IDENTITY_PLUGIN_GET_PRIVATE(object) (G_TYPE_INSTANCE_GET_PRIVATE ((object), GSD_TYPE_IDENTITY_PLUGIN, GsdIdentityPluginPrivate))
+
+GNOME_SETTINGS_PLUGIN_REGISTER (GsdIdentityPlugin, gsd_identity_plugin);
+
+static void
+gsd_identity_plugin_init (GsdIdentityPlugin *self)
+{
+        self->priv = GSD_IDENTITY_PLUGIN_GET_PRIVATE (self);
+
+        g_debug ("GsdIdentityPlugin initializing");
+}
+
+static void
+gsd_identity_plugin_finalize (GObject *object)
+{
+        GsdIdentityPlugin *self;
+
+        g_return_if_fail (object != NULL);
+        g_return_if_fail (GSD_IS_IDENTITY_PLUGIN (object));
+
+        g_debug ("GsdIdentityPlugin: finalizing");
+
+        self = GSD_IDENTITY_PLUGIN (object);
+
+        g_return_if_fail (self->priv != NULL);
+
+        g_clear_object (&self->priv->identity_manager);
+
+        G_OBJECT_CLASS (gsd_identity_plugin_parent_class)->finalize (object);
+}
+
+static void
+on_identity_renewed (GsdIdentityManager  *manager,
+                     GAsyncResult        *result,
+                     GnomeSettingsPlugin *self)
+{
+        GError *error;
+
+        error = NULL;
+        gsd_identity_manager_renew_identity_finish (manager,
+                                                    result,
+                                                    &error);
+
+        if (error != NULL) {
+                g_debug ("GsdIdentityPlugin: could not renew identity: %s",
+                         error->message);
+                g_error_free (error);
+                return;
+        }
+
+        g_debug ("GsdIdentityPlugin: identity renewed");
+}
+
+static void
+on_identity_needs_renewal (GsdIdentityManager *identity_manager,
+                           GsdIdentity        *identity,
+                           GsdIdentityPlugin  *self)
+{
+        g_debug ("GsdIdentityPlugin: identity needs renewal");
+        gsd_identity_manager_renew_identity (GSD_IDENTITY_MANAGER (self->priv->identity_manager),
+                                             identity,
+                                             NULL,
+                                             (GAsyncReadyCallback)
+                                             on_identity_renewed,
+                                             self);
+}
+
+static void
+on_identity_signed_in (GsdIdentityManager  *manager,
+                       GAsyncResult        *result,
+                       GnomeSettingsPlugin *self)
+{
+        GError *error;
+
+        error = NULL;
+        gsd_identity_manager_sign_identity_in_finish (manager,
+                                                      result,
+                                                      &error);
+
+        if (error != NULL) {
+                g_debug ("GsdIdentityPlugin: could not sign in identity: %s",
+                         error->message);
+                g_error_free (error);
+                return;
+        }
+
+        g_debug ("GsdIdentityPlugin: identity signed in");
+}
+
+typedef struct {
+        GsdIdentityPlugin  *plugin;
+        GsdIdentity        *identity;
+        NotifyNotification *notification;
+        GCancellable       *cancellable;
+        gulong              refreshed_signal_id;
+} SignInRequest;
+
+static SignInRequest *
+sign_in_request_new (GsdIdentityPlugin  *plugin,
+                     GsdIdentity        *identity,
+                     NotifyNotification *notification,
+                     GCancellable       *cancellable)
+{
+    SignInRequest *request;
+
+    request = g_slice_new0 (SignInRequest);
+
+    request->plugin = plugin;
+    request->identity = g_object_ref (identity);
+    request->notification = notification;
+    request->cancellable = g_object_ref (cancellable);
+
+    return request;
+}
+
+static void
+sign_in_request_free (SignInRequest *data)
+{
+        GsdIdentityPlugin *plugin = data->plugin;
+
+        g_signal_handler_disconnect (plugin->priv->identity_manager,
+                                     data->refreshed_signal_id);
+        g_object_set_data (G_OBJECT (data->identity), "sign-in-request", NULL);
+        g_clear_object (&data->identity);
+        g_clear_object (&data->cancellable);
+        g_slice_free (SignInRequest, data);
+}
+
+typedef struct {
+        GsdIdentityPlugin   *plugin;
+        GsdIdentity         *identity;
+        GsdIdentityInquiry  *inquiry;
+        GsdIdentityQuery    *query;
+        GcrSystemPrompt     *prompt;
+        GCancellable        *cancellable;
+} SystemPromptRequest;
+
+static SystemPromptRequest *
+system_prompt_request_new (GsdIdentityPlugin  *plugin,
+                           GcrSystemPrompt    *prompt,
+                           GsdIdentity        *identity,
+                           GsdIdentityInquiry *inquiry,
+                           GsdIdentityQuery   *query,
+                           GCancellable       *cancellable)
+{
+    SystemPromptRequest *data;
+
+    data = g_slice_new0 (SystemPromptRequest);
+
+    data->plugin = plugin;
+    data->prompt = prompt;
+    data->identity = g_object_ref (identity);
+    data->inquiry = g_object_ref (inquiry);
+    data->query = query;
+    data->cancellable = g_object_ref (cancellable);
+
+    return data;
+}
+
+static void
+system_prompt_request_free (SystemPromptRequest *data)
+{
+        g_clear_object (&data->identity);
+        g_clear_object (&data->inquiry);
+        g_clear_object (&data->cancellable);
+        g_slice_free (SystemPromptRequest, data);
+}
+
+static void
+close_system_prompt (GsdIdentityManager *manager,
+                     GsdIdentity        *identity,
+                     SystemPromptRequest          *data)
+{
+        GError *error;
+
+        /* Only close the prompt if the identity we're
+         * waiting on got refreshed
+         */
+        if (data->identity != identity) {
+                return;
+        }
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (manager),
+                                              G_CALLBACK (close_system_prompt),
+                                              data);
+        error = NULL;
+        if (!gcr_system_prompt_close (data->prompt,
+                                      NULL,
+                                      &error)) {
+                if (error != NULL) {
+                        g_debug ("GsdIdentityPlugin: could not close system prompt: %s",
+                                 error->message);
+                        g_error_free (error);
+                }
+        }
+}
+
+static void
+on_password_system_prompt_answered (GcrPrompt           *prompt,
+                                    GAsyncResult        *result,
+                                    SystemPromptRequest *request)
+{
+        GsdIdentityPlugin  *self = request->plugin;
+        GsdIdentityInquiry *inquiry = request->inquiry;
+        GsdIdentity        *identity = request->identity;
+        GsdIdentityQuery   *query = request->query;
+        GCancellable       *cancellable = request->cancellable;
+        GError             *error;
+        const char         *password;
+
+        error = NULL;
+        password = gcr_prompt_password_finish (prompt, result, &error);
+
+        if (password == NULL) {
+                if (error != NULL) {
+                        g_debug ("GsdIdentityPlugin: could not get password from user: %s",
+                                 error->message);
+                        g_error_free (error);
+                } else {
+                        g_cancellable_cancel (cancellable);
+                }
+        } else if (!g_cancellable_is_cancelled (cancellable)) {
+                gsd_identity_inquiry_answer_query (inquiry,
+                                                   query,
+                                                   password);
+        }
+
+        close_system_prompt (self->priv->identity_manager, identity, request);
+        system_prompt_request_free (request);
+}
+
+static void
+query_user (GsdIdentityPlugin   *self,
+            GsdIdentity         *identity,
+            GsdIdentityInquiry  *inquiry,
+            GsdIdentityQuery    *query,
+            GcrPrompt           *prompt,
+            GCancellable        *cancellable)
+{
+        SystemPromptRequest  *request;
+        char                 *prompt_text;
+        GsdIdentityQueryMode  query_mode;
+        char                 *description;
+        char                 *name;
+
+        g_assert (GSD_IS_KERBEROS_IDENTITY (identity));
+
+        gcr_prompt_set_title (prompt, _("Sign In to Realm"));
+
+        name = gsd_identity_manager_name_identity (self->priv->identity_manager,
+                                                   identity);
+
+        description = g_strdup_printf (_("The network realm %s needs some information to sign you in."), name);
+        g_free (name);
+
+        gcr_prompt_set_description (prompt, description);
+        g_free (description);
+
+        prompt_text = gsd_identity_query_get_prompt (inquiry, query);
+        gcr_prompt_set_message (prompt, prompt_text);
+        g_free (prompt_text);
+
+        request = system_prompt_request_new (self,
+                                             GCR_SYSTEM_PROMPT (prompt),
+                                             identity,
+                                             inquiry,
+                                             query,
+                                             cancellable);
+
+        g_signal_connect (G_OBJECT (self->priv->identity_manager),
+                          "identity-refreshed",
+                          G_CALLBACK (close_system_prompt),
+                          request);
+
+        query_mode = gsd_identity_query_get_mode (inquiry, query);
+
+        switch (query_mode) {
+                case GSD_IDENTITY_QUERY_MODE_INVISIBLE:
+                    gcr_prompt_password_async (prompt,
+                                               cancellable,
+                                               (GAsyncReadyCallback)
+                                               on_password_system_prompt_answered,
+                                               request);
+                    break;
+                case GSD_IDENTITY_QUERY_MODE_VISIBLE:
+                    gcr_prompt_password_async (prompt,
+                                               cancellable,
+                                               (GAsyncReadyCallback)
+                                               on_password_system_prompt_answered,
+                                               request);
+                    break;
+        }
+}
+
+typedef struct {
+        GsdIdentityPlugin   *plugin;
+        GsdIdentityInquiry  *inquiry;
+        GCancellable        *cancellable;
+} SystemPromptOpenRequest;
+
+static SystemPromptOpenRequest *
+system_prompt_open_request_new (GsdIdentityPlugin  *plugin,
+                                GsdIdentityInquiry *inquiry,
+                                GCancellable       *cancellable)
+{
+    SystemPromptOpenRequest *data;
+
+    data = g_slice_new0 (SystemPromptOpenRequest);
+
+    data->plugin = plugin;
+    data->inquiry = g_object_ref (inquiry);
+    data->cancellable = g_object_ref (cancellable);
+
+    return data;
+}
+
+static void
+system_prompt_open_request_free (SystemPromptOpenRequest *data)
+{
+        g_clear_object (&data->inquiry);
+        g_clear_object (&data->cancellable);
+        g_slice_free (SystemPromptOpenRequest, data);
+}
+
+static void
+on_system_prompt_open (GcrSystemPrompt         *system_prompt,
+                       GAsyncResult            *result,
+                       SystemPromptOpenRequest *request)
+{
+        GsdIdentityPlugin       *self = request->plugin;
+        GsdIdentityInquiry      *inquiry = request->inquiry;
+        GCancellable            *cancellable = request->cancellable;
+        GsdIdentity             *identity;
+        GsdIdentityQuery        *query;
+        GcrPrompt               *prompt;
+        GError                  *error;
+        GsdIdentityInquiryIter   iter;
+
+        error = NULL;
+        prompt = gcr_system_prompt_open_finish (result, &error);
+
+        if (prompt == NULL) {
+                if (error != NULL) {
+                        g_debug ("GsdIdentityPlugin: could not open system prompt: %s",
+                                 error->message);
+                        g_error_free (error);
+                }
+                return;
+        }
+
+        identity = gsd_identity_inquiry_get_identity (inquiry);
+        gsd_identity_inquiry_iter_init (&iter, inquiry);
+        while ((query = gsd_identity_inquiry_iter_next (&iter, inquiry)) != NULL) {
+                query_user (self, identity, inquiry, query, prompt, cancellable);
+        }
+
+        system_prompt_open_request_free (request);
+}
+
+static void
+on_identity_inquiry (GsdIdentityInquiry *inquiry,
+                     GCancellable       *cancellable,
+                     GsdIdentityPlugin  *self)
+{
+        SystemPromptOpenRequest *request;
+
+        request = system_prompt_open_request_new (self, inquiry, cancellable);
+        gcr_system_prompt_open_async (-1,
+                                      cancellable,
+                                      (GAsyncReadyCallback)
+                                      on_system_prompt_open,
+                                      request);
+}
+
+static void
+on_sign_in_clicked (NotifyNotification *notification,
+                    const char         *acition_id,
+                    SignInRequest      *request)
+{
+        GsdIdentityPlugin *self = request->plugin;
+        GsdIdentity       *identity = request->identity;
+        const char        *identifier;
+
+        identifier = gsd_identity_get_identifier (identity);
+        gsd_identity_manager_sign_identity_in (self->priv->identity_manager,
+                                               identifier,
+                                               (GsdIdentityInquiryFunc)
+                                               on_identity_inquiry,
+                                               self,
+                                               request->cancellable,
+                                               (GAsyncReadyCallback)
+                                               on_identity_signed_in,
+                                               self);
+}
+
+static void
+close_notification (GCancellable       *cancellable,
+                    NotifyNotification *notification)
+{
+        notify_notification_close (notification, NULL);
+}
+
+static void
+cancel_sign_in (GsdIdentityManager *identity_manager,
+                GsdIdentity        *identity,
+                SignInRequest         *data)
+{
+        if (data->cancellable == NULL) {
+                return;
+        }
+
+        if (!g_cancellable_is_cancelled (data->cancellable)) {
+                g_cancellable_cancel (data->cancellable);
+        }
+
+        g_clear_object (&data->cancellable);
+}
+
+static void
+ask_to_sign_in (GsdIdentityPlugin  *self,
+                GsdIdentity        *identity)
+{
+        NotifyNotification *notification;
+        char               *name;
+        char               *description;
+        SignInRequest      *request;
+        GCancellable       *cancellable;
+
+        request = g_object_get_data (G_OBJECT (identity), "sign-in-request");
+
+        if (request != NULL) {
+                if (!g_cancellable_is_cancelled (request->cancellable)) {
+                        g_cancellable_cancel (request->cancellable);
+                }
+        }
+
+        g_debug ("GsdIdentityPlugin: asking to sign back in");
+
+        name = gsd_identity_manager_name_identity (self->priv->identity_manager,
+                                                   identity);
+        if (gsd_identity_is_signed_in (identity)) {
+                description = g_strdup_printf (_("The network realm %s will soon be inaccessible."),
+                                               name);
+        } else {
+                description = g_strdup_printf (_("The network realm %s is now inaccessible."),
+                                               name);
+        }
+        g_free (name);
+
+        notification = notify_notification_new (_("Realm Access"),
+                                                description,
+                                                "dialog-password-symbolic");
+        g_free (description);
+        notify_notification_set_app_name (notification, _("Network Realm"));
+
+        cancellable = g_cancellable_new ();
+
+        request = sign_in_request_new (self, identity, notification, cancellable);
+
+        g_object_set_data (G_OBJECT (identity), "sign-in-request", request);
+
+        g_cancellable_connect (cancellable,
+                               G_CALLBACK (close_notification),
+                               notification,
+                               NULL);
+        g_signal_connect_swapped (G_OBJECT (notification),
+                                  "closed",
+                                  G_CALLBACK (sign_in_request_free),
+                                  request);
+
+        request->refreshed_signal_id = g_signal_connect (G_OBJECT (self->priv->identity_manager),
+                                                         "identity-refreshed",
+                                                         G_CALLBACK (cancel_sign_in),
+                                                         request);
+
+        notify_notification_add_action (notification,
+                                        "sign-in",
+                                        _("Sign In"),
+                                        (NotifyActionCallback)
+                                        on_sign_in_clicked,
+                                        request,
+                                        NULL);
+
+        notify_notification_show (notification, NULL);
+}
+
+static void
+on_identity_expiring (GsdIdentityManager *identity_manager,
+                      GsdIdentity        *identity,
+                      GsdIdentityPlugin  *self)
+{
+        g_debug ("GsdIdentityPlugin: identity expiring");
+        ask_to_sign_in (self, identity);
+}
+
+static void
+on_identity_expired (GsdIdentityManager *identity_manager,
+                     GsdIdentity        *identity,
+                     GsdIdentityPlugin  *self)
+{
+        g_debug ("GsdIdentityPlugin: identity expired");
+        ask_to_sign_in (self, identity);
+}
+
+static void
+on_identity_signed_in_for_service (GsdIdentityManager  *manager,
+                                   GAsyncResult        *result,
+                                   GSimpleAsyncResult  *service_result)
+{
+        GError *error;
+        GsdIdentity *identity;
+
+        error = NULL;
+        identity = gsd_identity_manager_sign_identity_in_finish (manager,
+                                                                 result,
+                                                                 &error);
+
+        if (error != NULL) {
+                g_debug ("GsdIdentityPlugin: Identity could not be signed in: %s",
+                         error->message);
+                g_simple_async_result_take_error (service_result, error);
+
+        } else {
+                g_debug ("GsdIdentityPlugin: Identity %s signed in",
+                         gsd_identity_get_identifier (identity));
+                g_simple_async_result_set_op_res_gpointer (service_result,
+                                                           g_object_ref (identity),
+                                                           (GDestroyNotify)
+                                                           g_object_unref);
+        }
+        g_simple_async_result_complete (service_result);
+
+}
+
+static void
+handle_identity_service_sign_in_signal (GsdIdentityService  *service,
+                                        const char          *identifier,
+                                        GVariant            *details,
+                                        GCancellable        *cancellable,
+                                        GSimpleAsyncResult  *result,
+                                        GsdIdentityPlugin   *self)
+{
+        gsd_identity_manager_sign_identity_in (self->priv->identity_manager,
+                                               identifier,
+                                               (GsdIdentityInquiryFunc)
+                                               on_identity_inquiry,
+                                               self,
+                                               cancellable,
+                                               (GAsyncReadyCallback)
+                                               on_identity_signed_in_for_service,
+                                               result);
+}
+
+static void
+on_identity_signed_out_for_service (GsdIdentityManager  *manager,
+                                    GAsyncResult        *result,
+                                    GSimpleAsyncResult  *service_result)
+{
+        GError *error;
+
+        error = NULL;
+        gsd_identity_manager_sign_identity_out_finish (manager, result, &error);
+
+        if (error != NULL) {
+                g_debug ("GsdIdentityPlugin: Identity could not be signed out: %s",
+                         error->message);
+                g_simple_async_result_take_error (service_result, error);
+
+        }
+
+        g_simple_async_result_complete (service_result);
+
+}
+
+static void
+on_got_identity_for_service (GsdIdentityManager  *manager,
+                             GAsyncResult        *result,
+                             GSimpleAsyncResult  *service_result)
+{
+        GError *error;
+        GsdIdentity *identity;
+
+        error = NULL;
+        identity = gsd_identity_manager_get_identity_finish (manager,
+                                                             result,
+                                                             &error);
+
+        if (error != NULL) {
+                g_debug ("GsdIdentityPlugin: Identity could not be signed in: %s",
+                         error->message);
+                g_simple_async_result_take_error (service_result, error);
+                g_simple_async_result_complete (service_result);
+                return;
+        }
+
+        gsd_identity_manager_sign_identity_out (manager,
+                                                identity,
+                                                NULL,
+                                                (GAsyncReadyCallback)
+                                                on_identity_signed_out_for_service,
+                                                service_result);
+}
+
+static void
+handle_identity_service_sign_out_signal (GsdIdentityService  *service,
+                                         const char          *identifier,
+                                         GCancellable        *cancellable,
+                                         GSimpleAsyncResult  *result,
+                                         GsdIdentityPlugin   *self)
+{
+        gsd_identity_manager_get_identity (self->priv->identity_manager,
+                                           identifier,
+                                           cancellable,
+                                           (GAsyncReadyCallback)
+                                           on_got_identity_for_service,
+                                           result);
+}
+
+static void
+on_bus_acquired (GDBusConnection   *connection,
+                 const char        *unique_name,
+                 GsdIdentityPlugin *self)
+{
+        g_debug ("GsdIdentityPlugin: Connected to session bus");
+
+        if (self->priv->identity_service == NULL) {
+                GError *error;
+
+                error = NULL;
+                self->priv->identity_service = gsd_identity_service_new (connection,
+                                                                         NULL,
+                                                                         &error);
+
+                if (self->priv->identity_service == NULL) {
+                        g_warning ("Could not create identity service: %s",
+                                   error->message);
+                }
+
+                g_signal_connect (G_OBJECT (self->priv->identity_service),
+                                  "handle-sign-in",
+                                  G_CALLBACK (handle_identity_service_sign_in_signal),
+                                  self);
+
+                g_signal_connect (G_OBJECT (self->priv->identity_service),
+                                  "handle-sign-out",
+                                  G_CALLBACK (handle_identity_service_sign_out_signal),
+                                  self);
+        }
+}
+
+static void
+on_name_acquired (GDBusConnection   *connection,
+                  const char        *name,
+                  GsdIdentityPlugin *self)
+{
+        if (g_strcmp0 (name, "org.gnome.Identity") == 0) {
+                g_debug ("GsdIdentityPlugin: Acquired name org.gnome.Identity");
+        }
+}
+
+static void
+on_name_lost (GDBusConnection   *connection,
+              const char        *name,
+              GsdIdentityPlugin *self)
+{
+        if (g_strcmp0 (name, "org.gnome.Identity") == 0) {
+                g_debug ("GsdIdentityPlugin: Lost name org.gnome.Identity");
+        }
+}
+
+static void
+impl_activate (GnomeSettingsPlugin *plugin)
+{
+        GsdIdentityPlugin *self = GSD_IDENTITY_PLUGIN (plugin);
+
+        g_debug ("GsdIdentityPlugin: Activating identity plugin");
+
+        if (self->priv->identity_manager == NULL) {
+                GError *error;
+
+                self->priv->identity_manager = gsd_kerberos_identity_manager_new (NULL, &error);
+
+                if (self->priv->identity_manager == NULL) {
+                        g_warning ("Could not create kerberos identity manager: %s",
+                                   error->message);
+                        g_error_free (error);
+                        g_clear_object (&self->priv->identity_manager);
+
+                        return;
+                }
+
+                g_signal_connect (G_OBJECT (self->priv->identity_manager),
+                                  "identity-needs-renewal",
+                                  G_CALLBACK (on_identity_needs_renewal),
+                                  self);
+                g_signal_connect (G_OBJECT (self->priv->identity_manager),
+                                  "identity-expiring",
+                                  G_CALLBACK (on_identity_expiring),
+                                  self);
+                g_signal_connect (G_OBJECT (self->priv->identity_manager),
+                                  "identity-expired",
+                                  G_CALLBACK (on_identity_expired),
+                                  self);
+        }
+
+        self->priv->bus_id = g_bus_own_name (G_BUS_TYPE_SESSION,
+                                             "org.gnome.Identity",
+                                             G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT | G_BUS_NAME_OWNER_FLAGS_REPLACE,
+                                             (GBusAcquiredCallback)
+                                             on_bus_acquired,
+                                             (GBusNameAcquiredCallback)
+                                             on_name_acquired,
+                                             (GBusNameAcquiredCallback)
+                                             on_name_lost,
+                                             self,
+                                             NULL);
+
+}
+
+static void
+impl_deactivate (GnomeSettingsPlugin *plugin)
+{
+        GsdIdentityPlugin *self = GSD_IDENTITY_PLUGIN (plugin);
+
+        g_debug ("GsdIdentityPlugin: Deactivating identity plugin");
+
+        if (self->priv->identity_manager != NULL) {
+                g_signal_handlers_disconnect_by_func (self, on_identity_needs_renewal, self);
+                g_signal_handlers_disconnect_by_func (self, on_identity_expiring, self);
+                g_signal_handlers_disconnect_by_func (self, on_identity_expired, self);
+                g_clear_object (&self->priv->identity_manager);
+        }
+
+        g_clear_object (&self->priv->identity_service);
+}
+
+static void
+gsd_identity_plugin_class_init (GsdIdentityPluginClass *klass)
+{
+        GObjectClass *object_class = G_OBJECT_CLASS (klass);
+        GnomeSettingsPluginClass *plugin_class = GNOME_SETTINGS_PLUGIN_CLASS (klass);
+
+        object_class->finalize = gsd_identity_plugin_finalize;
+
+        plugin_class->activate = impl_activate;
+        plugin_class->deactivate = impl_deactivate;
+
+        g_type_class_add_private (klass, sizeof (GsdIdentityPluginPrivate));
+}
+
+static void
+gsd_identity_plugin_class_finalize (GsdIdentityPluginClass *klass)
+{
+}
diff --git a/plugins/identity/gsd-identity-plugin.h b/plugins/identity/gsd-identity-plugin.h
new file mode 100644
index 00000000..ddfd9d4b
--- /dev/null
+++ b/plugins/identity/gsd-identity-plugin.h
@@ -0,0 +1,59 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#ifndef __GSD_IDENTITY_PLUGIN_H__
+#define __GSD_IDENTITY_PLUGIN_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gmodule.h>
+
+#include "gnome-settings-plugin.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY_PLUGIN                (gsd_identity_plugin_get_type ())
+#define GSD_IDENTITY_PLUGIN(o)                  (G_TYPE_CHECK_INSTANCE_CAST ((o), GSD_TYPE_IDENTITY_PLUGIN, GsdIdentityPlugin))
+#define GSD_IDENTITY_PLUGIN_CLASS(k)            (G_TYPE_CHECK_CLASS_CAST ((k), GSD_TYPE_IDENTITY_PLUGIN, GsdIdentityPluginClass))
+#define GSD_IS_IDENTITY_PLUGIN(o)               (G_TYPE_CHECK_INSTANCE_TYPE ((o), GSD_TYPE_IDENTITY_PLUGIN))
+#define GSD_IS_IDENTITY_PLUGIN_CLASS(k)         (G_TYPE_CHECK_CLASS_TYPE ((k), GSD_TYPE_IDENTITY_PLUGIN))
+#define GSD_IDENTITY_PLUGIN_GET_CLASS(o)        (G_TYPE_INSTANCE_GET_CLASS ((o), GSD_TYPE_IDENTITY_PLUGIN, GsdIdentityPluginClass))
+
+typedef struct GsdIdentityPluginPrivate GsdIdentityPluginPrivate;
+
+typedef struct
+{
+        GnomeSettingsPlugin parent;
+        GsdIdentityPluginPrivate *priv;
+} GsdIdentityPlugin;
+
+typedef struct
+{
+        GnomeSettingsPluginClass parent_class;
+} GsdIdentityPluginClass;
+
+GType gsd_identity_plugin_get_type (void) G_GNUC_CONST;
+
+/* All the plugins must implement this function */
+G_MODULE_EXPORT GType register_gnome_settings_plugin (GTypeModule *module);
+
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_PLUGIN_H__ */
diff --git a/plugins/identity/gsd-identity-service.c b/plugins/identity/gsd-identity-service.c
new file mode 100644
index 00000000..965865e1
--- /dev/null
+++ b/plugins/identity/gsd-identity-service.c
@@ -0,0 +1,674 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-identity-service.h"
+#include "org.gnome.Identity.h"
+#include "gsd-identity-manager.h"
+#include "gsd-kerberos-identity.h"
+#include "gsd-kerberos-identity-manager.h"
+#include "gsd-identity-enum-types.h"
+
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+
+struct _GsdIdentityServicePrivate
+{
+        GDBusConnection           *bus_connection;
+        GDBusObjectManagerServer  *object_manager_server;
+        GsdIdentityServiceManager *server_manager;
+        GsdIdentityManager        *identity_manager;
+        GCancellable              *cancellable;
+};
+
+enum {
+        PROP_0,
+        PROP_BUS_CONNECTION
+};
+
+enum {
+        HANDLE_SIGN_IN,
+        HANDLE_SIGN_OUT,
+        NUMBER_OF_SIGNALS
+
+};
+
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+static void gsd_identity_service_set_property (GObject       *object,
+                                               guint          property_id,
+                                               const GValue  *value,
+                                               GParamSpec    *param_spec);
+static void gsd_identity_service_get_property (GObject    *object,
+                                               guint       property_id,
+                                               GValue     *value,
+                                               GParamSpec *param_spec);
+static void initable_interface_init (GInitableIface *interface);
+G_DEFINE_TYPE_WITH_CODE (GsdIdentityService,
+                         gsd_identity_service,
+                         G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                initable_interface_init));
+static char *
+escape_object_path_component (const char *data,
+                              gsize       length)
+{
+       const char *p;
+       char *object_path;
+       GString *string;
+
+       g_return_val_if_fail (data != NULL, NULL);
+
+       string = g_string_sized_new ((length + 1) * 6);
+
+       for (p = data; *p != '\0'; p++)
+       {
+               guchar character;
+
+               character = (guchar) *p;
+
+               if (((character >= ((guchar) 'a')) &&
+                    (character <= ((guchar) 'z'))) ||
+                   ((character >= ((guchar) 'A')) &&
+                    (character <= ((guchar) 'Z'))) ||
+                   ((character >= ((guchar) '0')) &&
+                    (character <= ((guchar) '9'))))
+               {
+                       g_string_append_c (string, (char) character);
+                       continue;
+               }
+
+               g_string_append_printf (string, "_%x_", character);
+       }
+
+       object_path = string->str;
+
+       g_string_free (string, FALSE);
+
+       return object_path;
+}
+
+static char *
+get_object_path_for_identity (GsdIdentityService *self,
+                              GsdIdentity        *identity)
+{
+        char    **components;
+        GString  *object_path;
+        int       i;
+
+        components = gsd_identity_get_identifier_components (identity);
+        object_path = g_string_new ("/org/gnome/Identity/Manager");
+
+        for (i = 0; components[i] != NULL; i++) {
+                char *escaped_component;
+
+                g_string_append_c (object_path, '/');
+                escaped_component = escape_object_path_component (components[i],
+                                                                  (gsize) strlen (components[i]));
+
+                g_string_append (object_path, escaped_component);
+
+                g_free (escaped_component);
+        }
+        g_strfreev (components);
+
+        return g_string_free (object_path, FALSE);
+}
+
+static char *
+export_identity (GsdIdentityService *self,
+                 GsdIdentity        *identity)
+{
+        char *object_path;
+        GDBusObjectSkeleton *object;
+        GDBusInterfaceSkeleton *interface;
+
+        object_path = get_object_path_for_identity (self, identity);
+        object = G_DBUS_OBJECT_SKELETON (gsd_identity_service_object_skeleton_new (object_path));
+        interface = G_DBUS_INTERFACE_SKELETON (gsd_identity_service_org_gnome_identity_skeleton_new ());
+
+        g_object_bind_property (G_OBJECT (identity),
+                                "identifier",
+                                G_OBJECT (interface),
+                                "identifier",
+                                G_BINDING_DEFAULT);
+
+        g_object_bind_property (G_OBJECT (identity),
+                                "expiration-timestamp",
+                                G_OBJECT (interface),
+                                "expiration-timestamp",
+                                G_BINDING_DEFAULT);
+
+        g_dbus_object_skeleton_add_interface (object, interface);
+        g_object_unref (interface);
+
+        g_dbus_object_manager_server_export (self->priv->object_manager_server,
+                                             object);
+        g_object_unref (object);
+
+        return object_path;
+}
+
+static void
+unexport_identity (GsdIdentityService *self,
+                   GsdIdentity        *identity)
+{
+        char *object_path;
+
+        object_path = get_object_path_for_identity (self, identity);
+        g_dbus_object_manager_server_unexport (self->priv->object_manager_server,
+                                               object_path);
+        g_free (object_path);
+}
+
+static void
+on_identity_added (GsdIdentityManager  *manager,
+                   GsdIdentity         *identity,
+                   GsdIdentityService  *self)
+{
+        export_identity (self, identity);
+}
+
+static void
+on_identity_removed (GsdIdentityManager  *manager,
+                     GsdIdentity         *identity,
+                     GsdIdentityService  *self)
+{
+        unexport_identity (self, identity);
+}
+
+static void
+on_identity_expired (GsdIdentityManager  *manager,
+                     GsdIdentity         *identity,
+                     GsdIdentityService  *self)
+{
+}
+
+static void
+on_identity_refreshed (GsdIdentityManager  *manager,
+                       GsdIdentity         *identity,
+                       GsdIdentityService  *self)
+{
+}
+
+static void
+on_identity_renamed (GsdIdentityManager  *manager,
+                     GsdIdentity         *identity,
+                     GsdIdentityService  *self)
+{
+}
+
+static void
+on_identities_listed (GsdIdentityManager   *manager,
+                      GAsyncResult         *result,
+                      GsdIdentityService   *self)
+{
+        GError *error = NULL;
+        GList *identities, *node;
+
+        g_signal_connect (manager,
+                          "identity-added",
+                          G_CALLBACK (on_identity_added),
+                          self);
+
+        g_signal_connect (manager,
+                          "identity-removed",
+                          G_CALLBACK (on_identity_removed),
+                          self);
+
+        g_signal_connect (manager,
+                          "identity-expired",
+                          G_CALLBACK (on_identity_expired),
+                          self);
+
+        g_signal_connect (manager,
+                          "identity-refreshed",
+                          G_CALLBACK (on_identity_refreshed),
+                          self);
+
+        g_signal_connect (manager,
+                          "identity-renamed",
+                          G_CALLBACK (on_identity_renamed),
+                          self);
+
+        identities = gsd_identity_manager_list_identities_finish (manager,
+                                                                 result,
+                                                                 &error);
+
+        if (identities == NULL) {
+                if (error != NULL) {
+                        g_warning ("UmUserPanel: Could not list identities: %s",
+                                   error->message);
+                        g_error_free (error);
+                }
+                return;
+        }
+
+        for (node = identities; node != NULL; node = node->next) {
+                GsdIdentity *identity = node->data;
+
+                export_identity (self, identity);
+        }
+}
+
+static void
+on_sign_in_handled (GsdIdentityService     *self,
+                    GSimpleAsyncResult     *result,
+                    GDBusMethodInvocation  *invocation)
+{
+        GError *error;
+        GsdIdentity *identity;
+        char *object_path;
+
+        error = NULL;
+        if (g_simple_async_result_propagate_error (result,
+                                                   &error)) {
+                g_dbus_method_invocation_take_error (invocation, error);
+                return;
+        }
+
+        identity = GSD_IDENTITY (g_simple_async_result_get_op_res_gpointer (result));
+        object_path = export_identity (self, identity);
+        g_object_unref (identity);
+
+        g_dbus_method_invocation_return_value (invocation,
+                                               g_variant_new ("(o)", object_path));
+        g_free (object_path);
+}
+
+static gboolean
+handle_sign_in (GsdIdentityServiceManager *manager,
+                GDBusMethodInvocation     *invocation,
+                const char                *identifier,
+                GVariant                  *details,
+                GsdIdentityService        *self)
+{
+        GSimpleAsyncResult *result;
+        GCancellable *cancellable;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            (GAsyncReadyCallback)
+                                            on_sign_in_handled,
+                                            invocation,
+                                            handle_sign_in);
+
+        /* FIXME: should we cancel this if the invoker falls off the bus ?*/
+        cancellable = g_cancellable_new ();
+        g_simple_async_result_set_check_cancellable (result, cancellable);
+
+        g_signal_emit (G_OBJECT (self),
+                       signals[HANDLE_SIGN_IN],
+                       0,
+                       identifier,
+                       details,
+                       cancellable,
+                       result);
+
+        return TRUE;
+}
+
+static void
+on_sign_out_handled (GsdIdentityService     *self,
+                     GSimpleAsyncResult     *result,
+                     GDBusMethodInvocation  *invocation)
+{
+        GError *error;
+
+        error = NULL;
+        if (g_simple_async_result_propagate_error (result,
+                                                   &error)) {
+                g_dbus_method_invocation_take_error (invocation, error);
+                return;
+        }
+
+
+        g_dbus_method_invocation_return_value (invocation, NULL);
+}
+
+static gboolean
+handle_sign_out (GsdIdentityServiceManager *manager,
+                 GDBusMethodInvocation     *invocation,
+                 const char                *identifier,
+                 GsdIdentityService        *self)
+{
+        GSimpleAsyncResult *result;
+        GCancellable *cancellable;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            (GAsyncReadyCallback)
+                                            on_sign_out_handled,
+                                            invocation,
+                                            handle_sign_out);
+
+        cancellable = g_cancellable_new ();
+        g_simple_async_result_set_check_cancellable (result, cancellable);
+
+        g_signal_emit (G_OBJECT (self),
+                       signals[HANDLE_SIGN_OUT],
+                       0,
+                       identifier,
+                       cancellable,
+                       result);
+
+        return TRUE;
+}
+
+static gboolean
+gsd_identity_service_initable_init (GInitable     *initable,
+                                   GCancellable   *cancellable,
+                                   GError        **error)
+{
+        GsdIdentityService *self = GSD_IDENTITY_SERVICE (initable);
+        GsdIdentityServiceObjectSkeleton *object;
+
+        if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                return FALSE;
+        }
+
+        g_return_val_if_fail (self->priv->bus_connection != NULL, FALSE);
+
+        self->priv->object_manager_server = g_dbus_object_manager_server_new ("/org/gnome/Identity");
+
+        self->priv->server_manager = gsd_identity_service_manager_skeleton_new ();
+        g_signal_connect (self->priv->server_manager,
+                          "handle-sign-in",
+                          G_CALLBACK (handle_sign_in),
+                          self);
+        g_signal_connect (self->priv->server_manager,
+                          "handle-sign-out",
+                          G_CALLBACK (handle_sign_out),
+                          self);
+
+        object = gsd_identity_service_object_skeleton_new ("/org/gnome/Identity/Manager");
+        gsd_identity_service_object_skeleton_set_manager (object,
+                                                         self->priv->server_manager);
+
+        g_dbus_object_manager_server_export (self->priv->object_manager_server,
+                                             G_DBUS_OBJECT_SKELETON (object));
+        g_object_unref (object);
+
+        g_dbus_object_manager_server_set_connection (self->priv->object_manager_server,
+                                                     self->priv->bus_connection);
+
+        self->priv->identity_manager = gsd_kerberos_identity_manager_new (cancellable, error);
+        if (self->priv->identity_manager == NULL) {
+                return FALSE;
+        }
+
+        self->priv->cancellable = g_cancellable_new ();
+        gsd_identity_manager_list_identities (self->priv->identity_manager,
+                                              self->priv->cancellable,
+                                              (GAsyncReadyCallback)
+                                              on_identities_listed, self);
+
+        return TRUE;
+}
+
+static void
+initable_interface_init (GInitableIface *interface)
+{
+        interface->init = gsd_identity_service_initable_init;
+}
+
+static void
+gsd_identity_service_init (GsdIdentityService *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_IDENTITY_SERVICE,
+                                                  GsdIdentityServicePrivate);
+}
+
+static void
+gsd_identity_service_dispose (GObject *object)
+{
+        GsdIdentityService *self = GSD_IDENTITY_SERVICE (object);
+
+        g_clear_object (&self->priv->bus_connection);
+        g_clear_object (&self->priv->object_manager_server);
+        g_clear_object (&self->priv->server_manager);
+        g_clear_object (&self->priv->identity_manager);
+
+        g_cancellable_cancel (self->priv->cancellable);
+        g_clear_object (&self->priv->cancellable);
+
+        G_OBJECT_CLASS (gsd_identity_service_parent_class)->dispose (object);
+}
+
+static void
+gsd_identity_service_finalize (GObject *object)
+{
+        G_OBJECT_CLASS (gsd_identity_service_parent_class)->finalize (object);
+}
+
+static void
+gsd_identity_service_set_property (GObject       *object,
+                                  guint           property_id,
+                                  const GValue   *value,
+                                  GParamSpec     *param_spec)
+{
+        GsdIdentityService *self = GSD_IDENTITY_SERVICE (object);
+
+        switch (property_id) {
+                case PROP_BUS_CONNECTION:
+                        self->priv->bus_connection = g_value_dup_object (value);
+                        break;
+
+                default:
+                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, param_spec);
+                        break;
+        }
+}
+
+static void
+gsd_identity_service_get_property (GObject    *object,
+                                   guint       property_id,
+                                   GValue     *value,
+                                   GParamSpec *param_spec)
+{
+        GsdIdentityService *self = GSD_IDENTITY_SERVICE (object);
+
+        switch (property_id) {
+                case PROP_BUS_CONNECTION:
+                        g_value_set_object (value, self->priv->bus_connection);
+                        break;
+
+                default:
+                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, param_spec);
+                        break;
+        }
+}
+
+static char *
+dashed_string_to_studly_caps (const char *dashed_string)
+{
+        char *studly_string;;
+        size_t studly_string_length;
+        size_t i;
+
+        i = 0;
+
+        studly_string = g_strdup (dashed_string);
+        studly_string_length = strlen (studly_string);
+
+        studly_string[i] = g_ascii_toupper (studly_string[i]);
+        i++;
+
+        while (i < studly_string_length) {
+                if (studly_string[i] == '-' || studly_string[i] == '_') {
+                        memmove (studly_string + i,
+                                 studly_string + i + 1,
+                                 studly_string_length - i - 1);
+                        studly_string_length--;
+                        if (g_ascii_isalpha (studly_string[i])) {
+                                studly_string[i] = g_ascii_toupper (studly_string[i]);
+                        }
+                }
+                i++;
+        }
+        studly_string[studly_string_length] = '\0';
+
+        return studly_string;
+}
+
+static char *
+dashed_string_to_dbus_error_string (const char *dashed_string,
+                                    const char *old_prefix,
+                                    const char *new_prefix,
+                                    const char *suffix)
+{
+        char *studly_suffix;
+        char *dbus_error_string;
+        size_t dbus_error_string_length;
+        size_t i;
+
+        i = 0;
+
+        if (g_str_has_prefix (dashed_string, old_prefix) &&
+            (dashed_string[strlen(old_prefix)] == '-' ||
+             dashed_string[strlen(old_prefix)] == '_')) {
+                dashed_string += strlen (old_prefix) + 1;
+        }
+
+        studly_suffix = dashed_string_to_studly_caps (suffix);
+        dbus_error_string = g_strdup_printf ("%s.%s.%s", new_prefix, dashed_string, studly_suffix);
+        g_free (studly_suffix);
+        i += strlen (new_prefix) + 1;
+
+        dbus_error_string_length = strlen (dbus_error_string);
+
+        dbus_error_string[i] = g_ascii_toupper (dbus_error_string[i]);
+        i++;
+
+        while (i < dbus_error_string_length) {
+                if (dbus_error_string[i] == '_' || dbus_error_string[i] == '-') {
+                        dbus_error_string[i] = '.';
+
+                        if (g_ascii_isalpha (dbus_error_string[i + 1])) {
+                                dbus_error_string[i + 1] =  g_ascii_toupper (dbus_error_string[i + 1]);
+                        }
+                }
+
+                i++;
+        }
+
+        return dbus_error_string;
+}
+
+static void
+register_error_domain (GQuark error_domain,
+                       GType  error_enum)
+{
+        const char *error_domain_string;
+        char *type_name;
+        GType type;
+        GTypeClass *type_class;
+        GEnumClass *enum_class;
+        guint i;
+
+        error_domain_string = g_quark_to_string (error_domain);
+        type_name = dashed_string_to_studly_caps (error_domain_string);
+        type = g_type_from_name (type_name);
+        type_class = g_type_class_ref (type);
+        enum_class = G_ENUM_CLASS (type_class);
+
+        for (i = 0; i < enum_class->n_values; i++) {
+                char *dbus_error_string;
+
+                dbus_error_string = dashed_string_to_dbus_error_string (error_domain_string,
+                                                                        "gsd",
+                                                                        "org.gnome",
+                                                                        enum_class->values[i].value_nick);
+
+                g_debug ("GsdIdentityService: Registering dbus error %s", dbus_error_string);
+                g_dbus_error_register_error (error_domain,
+                                             enum_class->values[i].value,
+                                             dbus_error_string);
+                g_free (dbus_error_string);
+        }
+
+        g_type_class_unref (type_class);
+}
+
+static void
+gsd_identity_service_class_init (GsdIdentityServiceClass *service_class)
+{
+        GObjectClass *object_class = G_OBJECT_CLASS (service_class);
+        GParamSpec   *param_spec;
+
+        object_class->dispose = gsd_identity_service_dispose;
+        object_class->finalize = gsd_identity_service_finalize;
+        object_class->set_property = gsd_identity_service_set_property;
+        object_class->get_property = gsd_identity_service_get_property;
+
+        signals[HANDLE_SIGN_IN] = g_signal_new ("handle-sign-in",
+                                                G_TYPE_FROM_CLASS (service_class),
+                                                G_SIGNAL_RUN_LAST,
+                                                G_STRUCT_OFFSET (GsdIdentityServiceClass, handle_sign_in),
+                                                NULL, NULL, NULL,
+                                                G_TYPE_NONE, 4,
+                                                G_TYPE_STRING,
+                                                G_TYPE_VARIANT,
+                                                G_TYPE_CANCELLABLE,
+                                                G_TYPE_SIMPLE_ASYNC_RESULT);
+        signals[HANDLE_SIGN_OUT] = g_signal_new ("handle-sign-out",
+                                                 G_TYPE_FROM_CLASS (service_class),
+                                                 G_SIGNAL_RUN_LAST,
+                                                 G_STRUCT_OFFSET (GsdIdentityServiceClass, handle_sign_out),
+                                                 NULL, NULL, NULL,
+                                                 G_TYPE_NONE, 3,
+                                                 G_TYPE_STRING,
+                                                 G_TYPE_CANCELLABLE,
+                                                 G_TYPE_SIMPLE_ASYNC_RESULT);
+        param_spec = g_param_spec_object ("bus-connection",
+                                          "Bus Connection",
+                                          "bus connection",
+                                          G_TYPE_DBUS_CONNECTION,
+                                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
+        g_object_class_install_property (object_class, PROP_BUS_CONNECTION, param_spec);
+        register_error_domain (GSD_IDENTITY_MANAGER_ERROR,
+                               GSD_TYPE_IDENTITY_MANAGER_ERROR);
+        register_error_domain (GSD_IDENTITY_ERROR,
+                               GSD_TYPE_IDENTITY_ERROR);
+
+        g_type_class_add_private (service_class, sizeof (GsdIdentityServicePrivate));
+}
+
+GsdIdentityService *
+gsd_identity_service_new (GDBusConnection  *connection,
+                          GCancellable     *cancellable,
+                          GError          **error)
+{
+        GObject *object;
+
+        object = g_object_new (GSD_TYPE_IDENTITY_SERVICE,
+                               "bus-connection", connection,
+                               NULL);
+
+        if (!g_initable_init (G_INITABLE (object), cancellable, error)) {
+                return NULL;
+        }
+
+        return GSD_IDENTITY_SERVICE (object);
+}
+
diff --git a/plugins/identity/gsd-identity-service.h b/plugins/identity/gsd-identity-service.h
new file mode 100644
index 00000000..913f229e
--- /dev/null
+++ b/plugins/identity/gsd-identity-service.h
@@ -0,0 +1,73 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_SERVICE_H__
+#define __GSD_IDENTITY_SERVICE_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY_SERVICE           (gsd_identity_service_get_type ())
+#define GSD_IDENTITY_SERVICE(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GSD_TYPE_IDENTITY_SERVICE, GsdIdentityService))
+#define GSD_IDENTITY_SERVICE_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GSD_TYPE_IDENTITY_SERVICE, GsdIdentityServiceClass))
+#define GSD_IS_IDENTITY_SERVICE(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GSD_TYPE_IDENTITY_SERVICE))
+#define GSD_IS_IDENTITY_SERVICE_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GSD_TYPE_IDENTITY_SERVICE))
+#define GSD_IDENTITY_SERVICE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GSD_TYPE_IDENTITY_SERVICE, GsdIdentityServiceClass))
+
+typedef struct _GsdIdentityService           GsdIdentityService;
+typedef struct _GsdIdentityServiceClass      GsdIdentityServiceClass;
+typedef struct _GsdIdentityServicePrivate    GsdIdentityServicePrivate;
+
+struct _GsdIdentityService
+{
+        GObject parent_instance;
+        GsdIdentityServicePrivate *priv;
+};
+
+struct _GsdIdentityServiceClass
+{
+        GObjectClass parent_class;
+
+        void (* handle_sign_in) (GsdIdentityService  *server,
+                                 const char          *identifier,
+                                 GVariant            *details,
+                                 GCancellable        *cancellable,
+                                 GSimpleAsyncResult  *result);
+
+        void (* handle_sign_out) (GsdIdentityService  *server,
+                                  const char          *identifier,
+                                  GCancellable        *cancellable,
+                                  GSimpleAsyncResult  *result);
+
+};
+
+GType                  gsd_identity_service_get_type  (void);
+GsdIdentityService*    gsd_identity_service_new       (GDBusConnection  *connection,
+                                                       GCancellable     *cancellable,
+                                                       GError          **error);
+
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_SERVICE_H__ */
diff --git a/plugins/identity/gsd-identity-test.c b/plugins/identity/gsd-identity-test.c
new file mode 100644
index 00000000..21871e77
--- /dev/null
+++ b/plugins/identity/gsd-identity-test.c
@@ -0,0 +1,331 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-identity-test.h"
+#include "gsd-kerberos-identity-manager.h"
+#include "gsd-kerberos-identity.h"
+#include "gsd-identity-inquiry.h"
+
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+
+#include <krb5.h>
+
+struct _GsdIdentityTestPrivate
+{
+        GsdIdentityManager *identity_manager;
+        GCancellable       *cancellable;
+};
+
+G_DEFINE_TYPE (GsdIdentityTest, gsd_identity_test, G_TYPE_OBJECT);
+
+static void
+gsd_identity_test_init (GsdIdentityTest *self)
+{
+        GError *error;
+
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_KERBEROS_IDENTITY_MANAGER,
+                                                  GsdIdentityTestPrivate);
+
+        error = NULL;
+        self->priv->identity_manager = gsd_kerberos_identity_manager_new (NULL, &error);
+
+        if (self->priv->identity_manager == NULL) {
+                g_warning ("identity manager could not be created: %s", error->message);
+        }
+
+}
+
+static void
+gsd_identity_test_dispose (GObject *object)
+{
+        GsdIdentityTest *self = GSD_IDENTITY_TEST (object);
+
+        g_clear_object (&self->priv->identity_manager);
+
+        G_OBJECT_CLASS (gsd_identity_test_parent_class)->dispose (object);
+}
+
+static void
+gsd_identity_test_finalize (GObject *object)
+{
+        G_OBJECT_CLASS (gsd_identity_test_parent_class)->finalize (object);
+}
+
+static void
+gsd_identity_test_class_init (GsdIdentityTestClass *klass)
+{
+        GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+        object_class->dispose = gsd_identity_test_dispose;
+        object_class->finalize = gsd_identity_test_finalize;
+
+        g_type_class_add_private (klass, sizeof (GsdIdentityTestPrivate));
+}
+
+GsdIdentityTest *
+gsd_identity_test_new (void)
+{
+        GObject *object = g_object_new (GSD_TYPE_IDENTITY_TEST, NULL);
+
+        return GSD_IDENTITY_TEST (object);
+}
+
+static void
+on_identity_renewed (GsdIdentityManager *identity_manager,
+                     GAsyncResult       *result,
+                     GsdIdentityTest    *test)
+{
+        GError *error;
+
+        error = NULL;
+        gsd_identity_manager_renew_identity_finish (identity_manager,
+                                                    result,
+                                                    &error);
+
+        if (error != NULL) {
+                g_warning ("Could not renew identity: %s",
+                         error->message);
+                g_error_free (error);
+                return;
+        }
+
+        g_message ("identity renewed");
+}
+
+static void
+on_identity_needs_renewal (GsdIdentityManager *identity_manager,
+                           GsdIdentity        *identity,
+                           GsdIdentityTest    *test)
+{
+        g_message ("identity needs renewal");
+        gsd_identity_manager_renew_identity (identity_manager,
+                                             identity,
+                                             test->priv->cancellable,
+                                             (GAsyncReadyCallback)
+                                             on_identity_renewed,
+                                             test);
+}
+
+
+typedef struct
+{
+        GsdIdentityTest *test;
+        const char      *identifier;
+} SignInRequest;
+
+static void
+on_identity_inquiry (GsdIdentityInquiry *inquiry,
+                     GCancellable       *cancellable,
+                     GsdIdentityTest    *test)
+{
+        GsdIdentityInquiryIter iter;
+        GsdIdentityQuery *query;
+        char *name, *banner;
+        int fd;
+
+        if (g_cancellable_is_cancelled (test->priv->cancellable)) {
+                return;
+        }
+
+        name = gsd_identity_inquiry_get_name (inquiry);
+        g_message ("name: %s", name);
+        g_free (name);
+
+        banner = gsd_identity_inquiry_get_banner (inquiry);
+        g_message ("banner: %s", banner);
+        g_free (banner);
+
+        fd =  g_open ("/dev/tty", O_RDWR);
+        gsd_identity_inquiry_iter_init (&iter, inquiry);
+        while ((query = gsd_identity_inquiry_iter_next (&iter, inquiry)) != NULL) {
+                char *prompt;
+                char  answer[256] = "";
+                ssize_t bytes_read;
+                GsdIdentityQueryMode mode;
+
+                if (g_cancellable_is_cancelled (test->priv->cancellable)) {
+                        break;
+                }
+
+                prompt = gsd_identity_query_get_prompt (inquiry, query);
+                g_message ("prompt: %s", prompt);
+                g_free (prompt);
+
+                mode = gsd_identity_query_get_mode (inquiry, query);
+                if (mode == GSD_IDENTITY_QUERY_MODE_INVISIBLE) {
+                        /* don't print user input to screen */
+                        g_print ("\033[12h");
+                }
+
+                bytes_read = read (fd, answer, sizeof (answer) - 1);
+
+                if (mode == GSD_IDENTITY_QUERY_MODE_INVISIBLE) {
+                        /* restore visible input if we turned it off */
+                        g_print ("\033[12l");
+                }
+
+                if (g_cancellable_is_cancelled (test->priv->cancellable)) {
+                        break;
+                }
+
+                if (bytes_read > 0) {
+                        /* Trim off \n */
+                        answer[bytes_read - 1] = '\0';
+                        g_message ("using password '%s'", answer);
+                        gsd_identity_inquiry_answer_query (inquiry, query, answer);
+                }
+        }
+        close (fd);
+}
+
+static void
+on_identity_signed_in (GsdIdentityManager *identity_manager,
+                       GAsyncResult       *result,
+                       SignInRequest      *request)
+{
+        GError *error;
+
+        error = NULL;
+        gsd_identity_manager_sign_identity_in_finish (identity_manager,
+                                                      result,
+                                                      &error);
+
+        if (error != NULL) {
+                g_warning ("Could not sign-in identity %s: %s",
+                           request->identifier, error->message);
+                g_error_free (error);
+                g_object_unref (request->test);
+                g_slice_free (SignInRequest, request);
+                return;
+        }
+        g_message ("identity %s signed in", request->identifier);
+
+        g_object_unref (request->test);
+        g_slice_free (SignInRequest, request);
+}
+
+static void
+sign_in (GsdIdentityTest *test,
+         const char      *identifier)
+{
+        SignInRequest *request;
+
+        request = g_slice_new (SignInRequest);
+        request->test = g_object_ref (test);
+        request->identifier = identifier;
+
+        gsd_identity_manager_sign_identity_in (test->priv->identity_manager,
+                                               identifier,
+                                               (GsdIdentityInquiryFunc)
+                                               on_identity_inquiry,
+                                               test,
+                                               test->priv->cancellable,
+                                               (GAsyncReadyCallback)
+                                               on_identity_signed_in,
+                                               request);
+}
+
+static void
+on_identity_expiring (GsdIdentityManager *identity_manager,
+                      GsdIdentity        *identity,
+                      GsdIdentityTest    *test)
+{
+        const char *identifier;
+
+        g_message ("identity about to expire");
+
+        identifier = gsd_identity_get_identifier (identity);
+        sign_in (test, identifier);
+}
+
+static void
+on_identity_expired (GsdIdentityManager *identity_manager,
+                     GsdIdentity        *identity,
+                     GsdIdentityTest    *test)
+{
+        const char *identifier;
+
+        g_message ("identity expired");
+
+        identifier = gsd_identity_get_identifier (identity);
+        sign_in (test, identifier);
+}
+
+void
+gsd_identity_test_start (GsdIdentityTest  *test,
+                         GError          **error)
+{
+        const char *principal_name;
+
+        if (!g_cancellable_is_cancelled (test->priv->cancellable)) {
+                g_warning ("identity test started more than once");
+                g_cancellable_cancel (test->priv->cancellable);
+                g_clear_object (&test->priv->cancellable);
+        }
+
+        test->priv->cancellable = g_cancellable_new ();
+
+        g_signal_connect (G_OBJECT (test),
+                          "identity-needs-renewal",
+                          G_CALLBACK (on_identity_needs_renewal),
+                          NULL);
+        g_signal_connect (G_OBJECT (test),
+                          "identity-expiring",
+                          G_CALLBACK (on_identity_expiring),
+                          NULL);
+        g_signal_connect (G_OBJECT (test),
+                          "identity-expired",
+                          G_CALLBACK (on_identity_expired),
+                          NULL);
+
+        principal_name = g_getenv ("GSD_IDENTITY_TEST_PRINCIPAL");
+        if (principal_name != NULL) {
+                sign_in (test, principal_name);
+        }
+}
+
+void
+gsd_identity_test_stop (GsdIdentityTest *test)
+{
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (test),
+                                              G_CALLBACK (on_identity_needs_renewal),
+                                              NULL);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (test),
+                                              G_CALLBACK (on_identity_expiring),
+                                              NULL);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (test),
+                                              G_CALLBACK (on_identity_expired),
+                                              NULL);
+
+        g_cancellable_cancel (test->priv->cancellable);
+}
diff --git a/plugins/identity/gsd-identity-test.h b/plugins/identity/gsd-identity-test.h
new file mode 100644
index 00000000..292e094e
--- /dev/null
+++ b/plugins/identity/gsd-identity-test.h
@@ -0,0 +1,62 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_IDENTITY_TEST_H__
+#define __GSD_IDENTITY_TEST_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY_TEST           (gsd_identity_test_get_type ())
+#define GSD_IDENTITY_TEST(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GSD_TYPE_IDENTITY_TEST, GsdIdentityTest))
+#define GSD_IDENTITY_TEST_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GSD_TYPE_IDENTITY_TEST, GsdIdentityTestClass))
+#define GSD_IS_IDENTITY_TEST(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GSD_TYPE_IDENTITY_TEST))
+#define GSD_IS_IDENTITY_TEST_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GSD_TYPE_IDENTITY_TEST))
+#define GSD_IDENTITY_TEST_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GSD_TYPE_IDENTITY_TEST, GsdIdentityTestClass))
+
+typedef struct _GsdIdentityTest           GsdIdentityTest;
+typedef struct _GsdIdentityTestClass      GsdIdentityTestClass;
+typedef struct _GsdIdentityTestPrivate    GsdIdentityTestPrivate;
+
+struct _GsdIdentityTest
+{
+        GObject parent_instance;
+        GsdIdentityTestPrivate *priv;
+};
+
+struct _GsdIdentityTestClass
+{
+        GObjectClass parent_class;
+};
+
+GType                gsd_identity_test_get_type  (void);
+GsdIdentityTest*     gsd_identity_test_new       (void);
+
+void                 gsd_identity_test_start (GsdIdentityTest  *test,
+                                              GError          **error);
+void                 gsd_identity_test_stop (GsdIdentityTest  *test);
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_TEST_H__ */
diff --git a/plugins/identity/gsd-identity.c b/plugins/identity/gsd-identity.c
new file mode 100644
index 00000000..2aaf014d
--- /dev/null
+++ b/plugins/identity/gsd-identity.c
@@ -0,0 +1,83 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+#include <glib/gi18n.h>
+
+#include "gsd-identity.h"
+
+G_DEFINE_INTERFACE (GsdIdentity, gsd_identity, G_TYPE_OBJECT);
+
+static void
+gsd_identity_default_init (GsdIdentityInterface *interface)
+{
+        g_object_interface_install_property (interface,
+                                             g_param_spec_string ("identifier",
+                                                                  "identifier",
+                                                                  "identifier",
+                                                                  NULL,
+                                                                  G_PARAM_READABLE));
+        g_object_interface_install_property (interface,
+                                             g_param_spec_boolean ("is-signed-in",
+                                                                   "Is signed in",
+                                                                   "Whether or not identity is currently signed in",
+                                                                   FALSE,
+                                                                   G_PARAM_READABLE));
+        g_object_interface_install_property (interface,
+                                             g_param_spec_int64 ("expiration-timestamp",
+                                                                 "Expiration Timestamp",
+                                                                 "A timestamp of when the identities credentials expire",
+                                                                 -1,
+                                                                 G_MAXINT64,
+                                                                 -1,
+                                                                 G_PARAM_READABLE));
+}
+
+GQuark
+gsd_identity_error_quark (void)
+{
+        static GQuark error_quark = 0;
+
+        if (error_quark == 0) {
+                error_quark = g_quark_from_static_string ("gsd-identity-error");
+        }
+
+        return error_quark;
+}
+
+char **
+gsd_identity_get_identifier_components (GsdIdentity *self)
+{
+        return GSD_IDENTITY_GET_IFACE (self)->get_identifier_components (self);
+}
+
+const char *
+gsd_identity_get_identifier (GsdIdentity *self)
+{
+        return GSD_IDENTITY_GET_IFACE (self)->get_identifier (self);
+}
+
+gboolean
+gsd_identity_is_signed_in (GsdIdentity *self)
+{
+        return GSD_IDENTITY_GET_IFACE (self)->is_signed_in (self);
+}
diff --git a/plugins/identity/gsd-identity.h b/plugins/identity/gsd-identity.h
new file mode 100644
index 00000000..f4b1293e
--- /dev/null
+++ b/plugins/identity/gsd-identity.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode <rstrode@redhat.com>
+ */
+
+#ifndef __GSD_IDENTITY_H__
+#define __GSD_IDENTITY_H__
+
+#include <glib.h>
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_IDENTITY             (gsd_identity_get_type ())
+#define GSD_IDENTITY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_IDENTITY, GsdIdentity))
+#define GSD_IDENTITY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_IDENTITY, GsdIdentityInterface))
+#define GSD_IS_IDENTITY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_IDENTITY))
+#define GSD_IDENTITY_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE((obj), GSD_TYPE_IDENTITY, GsdIdentityInterface))
+#define GSD_IDENTITY_ERROR            (gsd_identity_error_quark ())
+
+typedef struct _GsdIdentity          GsdIdentity;
+typedef struct _GsdIdentityInterface GsdIdentityInterface;
+
+struct _GsdIdentityInterface
+{
+        GTypeInterface base_interface;
+
+        const char * (* get_identifier)              (GsdIdentity *identity);
+        char **      (* get_identifier_components)   (GsdIdentity *identity);
+        gboolean     (* is_signed_in)                (GsdIdentity *identity);
+};
+
+typedef enum
+{
+        GSD_IDENTITY_ERROR_NOT_FOUND,
+        GSD_IDENTITY_ERROR_VERIFYING,
+        GSD_IDENTITY_ERROR_RENEWING,
+        GSD_IDENTITY_ERROR_CREDENTIALS_UNAVAILABLE,
+        GSD_IDENTITY_ERROR_ENUMERATING_CREDENTIALS,
+        GSD_IDENTITY_ERROR_ALLOCATING_CREDENTIALS,
+        GSD_IDENTITY_ERROR_AUTHENTICATION_FAILED,
+        GSD_IDENTITY_ERROR_SAVING_CREDENTIALS,
+        GSD_IDENTITY_ERROR_REMOVING_CREDENTIALS,
+        GSD_IDENTITY_ERROR_PARSING_IDENTIFIER,
+} GsdIdentityError;
+
+GType       gsd_identity_get_type         (void);
+GQuark      gsd_identity_error_quark      (void);
+
+const char *gsd_identity_get_identifier            (GsdIdentity *identity);
+char **     gsd_identity_get_identifier_components (GsdIdentity *identity);
+gboolean    gsd_identity_is_signed_in              (GsdIdentity *identity);
+
+
+G_END_DECLS
+
+#endif /* __GSD_IDENTITY_H__ */
diff --git a/plugins/identity/gsd-kerberos-identity-inquiry.c b/plugins/identity/gsd-kerberos-identity-inquiry.c
new file mode 100644
index 00000000..a6a26314
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity-inquiry.c
@@ -0,0 +1,363 @@
+/* -*- Mode: C; tab-width: 8; ident-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-kerberos-identity-inquiry.h"
+#include "gsd-identity-inquiry-private.h"
+
+#include <string.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+
+struct _GsdKerberosIdentityInquiryPrivate
+{
+        GsdIdentity *identity;
+        char        *name;
+        char        *banner;
+        GList       *queries;
+        int          number_of_queries;
+        int          number_of_unanswered_queries;
+};
+
+typedef struct
+{
+        GsdIdentityInquiry *inquiry;
+        krb5_prompt        *kerberos_prompt;
+        gboolean            is_answered;
+} GsdKerberosIdentityQuery;
+
+static void identity_inquiry_interface_init (GsdIdentityInquiryInterface *interface);
+static void initable_interface_init (GInitableIface *interface);
+
+G_DEFINE_TYPE_WITH_CODE (GsdKerberosIdentityInquiry,
+                         gsd_kerberos_identity_inquiry,
+                         G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                initable_interface_init)
+                         G_IMPLEMENT_INTERFACE (GSD_TYPE_IDENTITY_INQUIRY,
+                                                identity_inquiry_interface_init));
+
+static gboolean
+gsd_kerberos_identity_inquiry_initable_init (GInitable      *initable,
+                                             GCancellable   *cancellable,
+                                             GError        **error)
+{
+        if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                return FALSE;
+        }
+
+        return TRUE;
+}
+
+static void
+initable_interface_init (GInitableIface *interface)
+{
+        interface->init = gsd_kerberos_identity_inquiry_initable_init;
+}
+
+static GsdKerberosIdentityQuery *
+gsd_kerberos_identity_query_new (GsdIdentityInquiry *inquiry,
+                                 krb5_prompt        *kerberos_prompt)
+{
+        GsdKerberosIdentityQuery *query;
+
+        query = g_slice_new (GsdKerberosIdentityQuery);
+        query->inquiry = inquiry;
+        query->kerberos_prompt = kerberos_prompt;
+        query->is_answered = FALSE;
+
+        return query;
+}
+
+static void
+gsd_kerberos_identity_query_free (GsdKerberosIdentityQuery *query)
+{
+        g_slice_free (GsdKerberosIdentityQuery, query);
+}
+
+static void
+gsd_kerberos_identity_inquiry_dispose (GObject *object)
+{
+        GsdKerberosIdentityInquiry *self = GSD_KERBEROS_IDENTITY_INQUIRY (object);
+
+        g_clear_object (&self->priv->identity);
+        g_clear_pointer (&self->priv->name, (GDestroyNotify) g_free);
+        g_clear_pointer (&self->priv->banner, (GDestroyNotify) g_free);
+
+        g_list_foreach (self->priv->queries,
+                        (GFunc)
+                        gsd_kerberos_identity_query_free,
+                        NULL);
+        g_clear_pointer (&self->priv->queries, (GDestroyNotify) g_list_free);
+}
+
+static void
+gsd_kerberos_identity_inquiry_finalize (GObject *object)
+{
+        G_OBJECT_CLASS (gsd_kerberos_identity_inquiry_parent_class)->finalize (object);
+}
+
+static void
+gsd_kerberos_identity_inquiry_class_init (GsdKerberosIdentityInquiryClass *klass)
+{
+        GObjectClass *object_class;
+
+        object_class = G_OBJECT_CLASS (klass);
+
+        object_class->dispose = gsd_kerberos_identity_inquiry_dispose;
+        object_class->finalize = gsd_kerberos_identity_inquiry_finalize;
+
+        g_type_class_add_private (klass, sizeof (GsdKerberosIdentityInquiryPrivate));
+}
+
+static void
+gsd_kerberos_identity_inquiry_init (GsdKerberosIdentityInquiry *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_KERBEROS_IDENTITY_INQUIRY,
+                                                  GsdKerberosIdentityInquiryPrivate);
+}
+
+GsdIdentityInquiry *
+gsd_kerberos_identity_inquiry_new (GsdKerberosIdentity *identity,
+                                   const char          *name,
+                                   const char          *banner,
+                                   krb5_prompt          prompts[],
+                                   int                  number_of_prompts)
+{
+        GObject                    *object;
+        GsdIdentityInquiry         *inquiry;
+        GsdKerberosIdentityInquiry *self;
+        GError                     *error;
+        int                         i;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY (identity), NULL);
+        g_return_val_if_fail (number_of_prompts > 0, NULL);
+
+        object = g_object_new (GSD_TYPE_KERBEROS_IDENTITY_INQUIRY, NULL);
+
+        inquiry = GSD_IDENTITY_INQUIRY (object);
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (object);
+
+        /* FIXME: make these construct properties */
+        self->priv->identity = g_object_ref (identity);
+        self->priv->name = g_strdup (name);
+        self->priv->banner = g_strdup (banner);
+
+        self->priv->number_of_queries = 0;
+        for (i = 0; i < number_of_prompts; i++) {
+                GsdKerberosIdentityQuery *query;
+
+                query = gsd_kerberos_identity_query_new (inquiry, &prompts[i]);
+
+                self->priv->queries = g_list_prepend (self->priv->queries, query);
+                self->priv->number_of_queries++;
+        }
+        self->priv->queries = g_list_reverse (self->priv->queries);
+
+        self->priv->number_of_unanswered_queries = self->priv->number_of_queries;
+
+        error = NULL;
+        if (!g_initable_init (G_INITABLE (self), NULL, &error)) {
+                g_debug ("%s", error->message);
+                g_error_free (error);
+                g_object_unref (self);
+                return NULL;
+        }
+
+        return inquiry;
+}
+
+static GsdIdentity *
+gsd_kerberos_identity_inquiry_get_identity (GsdIdentityInquiry *inquiry)
+{
+        GsdKerberosIdentityInquiry *self;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), NULL);
+
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        return self->priv->identity;
+}
+
+static char *
+gsd_kerberos_identity_inquiry_get_name (GsdIdentityInquiry *inquiry)
+{
+        GsdKerberosIdentityInquiry *self;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), NULL);
+
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        return g_strdup (self->priv->name);
+}
+
+static char *
+gsd_kerberos_identity_inquiry_get_banner (GsdIdentityInquiry *inquiry)
+{
+        GsdKerberosIdentityInquiry *self;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), NULL);
+
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        return g_strdup (self->priv->banner);
+}
+
+static gboolean
+gsd_kerberos_identity_inquiry_is_complete (GsdIdentityInquiry *inquiry)
+{
+        GsdKerberosIdentityInquiry *self;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), FALSE);
+
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        return self->priv->number_of_unanswered_queries == 0;
+}
+
+static void
+gsd_kerberos_identity_inquiry_mark_query_answered (GsdKerberosIdentityInquiry *self,
+                                                   GsdKerberosIdentityQuery   *query)
+{
+        if (query->is_answered) {
+                return;
+        }
+
+        query->is_answered = TRUE;
+        self->priv->number_of_unanswered_queries--;
+
+        if (self->priv->number_of_unanswered_queries == 0) {
+                _gsd_identity_inquiry_emit_complete (GSD_IDENTITY_INQUIRY (self));
+        }
+}
+
+static void
+gsd_kerberos_identity_inquiry_answer_query (GsdIdentityInquiry *inquiry,
+                                            GsdIdentityQuery   *query,
+                                            const char         *answer)
+{
+        GsdKerberosIdentityInquiry *self;
+        GsdKerberosIdentityQuery   *kerberos_query = (GsdKerberosIdentityQuery *) query;
+
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry));
+        g_return_if_fail (inquiry == kerberos_query->inquiry);
+        g_return_if_fail (!gsd_kerberos_identity_inquiry_is_complete (inquiry));
+
+        self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        inquiry = kerberos_query->inquiry;
+
+        strncpy (kerberos_query->kerberos_prompt->reply->data,
+                 answer,
+                 kerberos_query->kerberos_prompt->reply->length);
+        kerberos_query->kerberos_prompt->reply->length = (unsigned int) strlen (kerberos_query->kerberos_prompt->reply->data);
+
+        gsd_kerberos_identity_inquiry_mark_query_answered (self, kerberos_query);
+}
+
+static void
+gsd_kerberos_identity_inquiry_iter_init (GsdIdentityInquiryIter *iter,
+                                         GsdIdentityInquiry     *inquiry)
+{
+        GsdKerberosIdentityInquiry *self = GSD_KERBEROS_IDENTITY_INQUIRY (inquiry);
+
+        iter->data = self->priv->queries;
+}
+
+static GsdIdentityQuery *
+gsd_kerberos_identity_inquiry_iter_next (GsdIdentityInquiryIter *iter,
+                                         GsdIdentityInquiry     *inquiry)
+{
+        GsdIdentityQuery *query;
+        GList            *node;
+
+        node = iter->data;
+
+        if (node == NULL) {
+                return NULL;
+        }
+
+        query = (GsdIdentityQuery *) node->data;
+
+        node = node->next;
+
+        iter->data = node;
+
+        return query;
+}
+
+static GsdIdentityQueryMode
+gsd_kerberos_identity_query_get_mode (GsdIdentityInquiry *inquiry,
+                                      GsdIdentityQuery   *query)
+{
+        GsdKerberosIdentityQuery *kerberos_query = (GsdKerberosIdentityQuery *) query;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE);
+        g_return_val_if_fail (inquiry == kerberos_query->inquiry, GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE);
+
+        if (kerberos_query->kerberos_prompt->hidden) {
+                return GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE;
+        } else {
+                return GSD_KERBEROS_IDENTITY_QUERY_MODE_VISIBLE;
+        }
+}
+
+static char *
+gsd_kerberos_identity_query_get_prompt (GsdIdentityInquiry *inquiry,
+                                        GsdIdentityQuery   *query)
+{
+        GsdKerberosIdentityQuery *kerberos_query = (GsdKerberosIdentityQuery *) query;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE);
+        g_return_val_if_fail (inquiry == kerberos_query->inquiry, NULL);
+
+        return g_strdup (kerberos_query->kerberos_prompt->prompt);
+}
+
+static gboolean
+gsd_kerberos_identity_query_is_answered (GsdIdentityInquiry *inquiry,
+                                         GsdIdentityQuery   *query)
+{
+        GsdKerberosIdentityQuery *kerberos_query = (GsdKerberosIdentityQuery *) query;
+
+        g_return_val_if_fail (GSD_IS_KERBEROS_IDENTITY_INQUIRY (inquiry), GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE);
+        g_return_val_if_fail (inquiry == kerberos_query->inquiry, FALSE);
+
+        return kerberos_query->is_answered;
+}
+
+static void
+identity_inquiry_interface_init (GsdIdentityInquiryInterface *interface)
+{
+        interface->get_identity = gsd_kerberos_identity_inquiry_get_identity;
+        interface->get_name = gsd_kerberos_identity_inquiry_get_name;
+        interface->get_banner = gsd_kerberos_identity_inquiry_get_banner;
+        interface->is_complete = gsd_kerberos_identity_inquiry_is_complete;
+        interface->answer_query = gsd_kerberos_identity_inquiry_answer_query;
+        interface->iter_init = gsd_kerberos_identity_inquiry_iter_init;
+        interface->iter_next = gsd_kerberos_identity_inquiry_iter_next;
+        interface->get_mode = gsd_kerberos_identity_query_get_mode;
+        interface->get_prompt = gsd_kerberos_identity_query_get_prompt;
+        interface->is_answered = gsd_kerberos_identity_query_is_answered;
+}
diff --git a/plugins/identity/gsd-kerberos-identity-inquiry.h b/plugins/identity/gsd-kerberos-identity-inquiry.h
new file mode 100644
index 00000000..30c0956a
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity-inquiry.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C; tab-width: 8; ident-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_KERBEROS_IDENTITY_INQUIRY_H__
+#define __GSD_KERBEROS_IDENTITY_INQUIRY_H__
+
+#include <stdint.h>
+
+#include <glib.h>
+#include <glib-object.h>
+
+#include "gsd-identity-inquiry.h"
+#include "gsd-kerberos-identity.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_KERBEROS_IDENTITY_INQUIRY             (gsd_kerberos_identity_inquiry_get_type ())
+#define GSD_KERBEROS_IDENTITY_INQUIRY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_KERBEROS_IDENTITY_INQUIRY, GsdKerberosIdentityInquiry))
+#define GSD_KERBEROS_IDENTITY_INQUIRY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_KERBEROS_IDENTITY_INQUIRY, GsdKerberosIdentityInquiryClass))
+#define GSD_IS_KERBEROS_IDENTITY_INQUIRY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_KERBEROS_IDENTITY_INQUIRY))
+#define GSD_IS_KERBEROS_IDENTITY_INQUIRY_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GSD_TYPE_KERBEROS_IDENTITY_INQUIRY))
+#define GSD_KERBEROS_IDENTITY_INQUIRY_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), GSD_TYPE_KERBEROS_IDENTITY_INQUIRY, GsdKerberosIdentityInquiryClass))
+typedef struct _GsdKerberosIdentity               GsdKerberosIdentity;
+typedef struct _GsdKerberosIdentityInquiry        GsdKerberosIdentityInquiry;
+typedef struct _GsdKerberosIdentityInquiryClass   GsdKerberosIdentityInquiryClass;
+typedef struct _GsdKerberosIdentityInquiryPrivate GsdKerberosIdentityInquiryPrivate;
+typedef struct _GsdKerberosIdentityInquiryIter    GsdKerberosIdentityInquiryIter;
+
+typedef enum
+{
+        GSD_KERBEROS_IDENTITY_QUERY_MODE_INVISIBLE,
+        GSD_KERBEROS_IDENTITY_QUERY_MODE_VISIBLE
+} GsdKerberosIdentityQueryMode;
+
+struct _GsdKerberosIdentityInquiry
+{
+        GObject            parent;
+
+        GsdKerberosIdentityInquiryPrivate *priv;
+};
+
+struct _GsdKerberosIdentityInquiryClass
+{
+        GObjectClass parent_class;
+};
+
+GType         gsd_kerberos_identity_inquiry_get_type (void);
+
+GsdIdentityInquiry  *gsd_kerberos_identity_inquiry_new      (GsdKerberosIdentity *identity,
+                                                             const char          *name,
+                                                             const char          *banner,
+                                                             krb5_prompt          prompts[],
+                                                             int                  number_of_prompts);
+
+#endif /* __GSD_KERBEROS_IDENTITY_INQUIRY_H__ */
diff --git a/plugins/identity/gsd-kerberos-identity-manager.c b/plugins/identity/gsd-kerberos-identity-manager.c
new file mode 100644
index 00000000..88e6d799
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity-manager.c
@@ -0,0 +1,1590 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-kerberos-identity-manager.h"
+#include "gsd-identity-manager.h"
+#include "gsd-identity-manager-private.h"
+#include "gsd-kerberos-identity.h"
+
+#include <fcntl.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+
+#include <krb5.h>
+
+struct _GsdKerberosIdentityManagerPrivate
+{
+        GHashTable      *identities;
+        GHashTable      *expired_identities;
+        GHashTable      *identities_by_realm;
+        GAsyncQueue     *pending_operations;
+        GCancellable    *scheduler_cancellable;
+
+        krb5_context     kerberos_context;
+        GFileMonitor    *credentials_cache_monitor;
+        gulong           credentials_cache_changed_signal_id;
+        char            *credentials_cache_type;
+
+        GMutex           scheduler_job_lock;
+        GCond            scheduler_job_unblocked;
+        gboolean         is_blocking_scheduler_job;
+
+        volatile int     pending_refresh_count;
+};
+
+typedef enum
+{
+        OPERATION_TYPE_REFRESH,
+        OPERATION_TYPE_GET_IDENTITY,
+        OPERATION_TYPE_LIST,
+        OPERATION_TYPE_RENEW,
+        OPERATION_TYPE_SIGN_IN,
+        OPERATION_TYPE_SIGN_OUT,
+        OPERATION_TYPE_STOP_JOB
+} OperationType;
+
+typedef struct
+{
+        GCancellable               *cancellable;
+        GsdKerberosIdentityManager *manager;
+        OperationType               type;
+        GSimpleAsyncResult         *result;
+        GIOSchedulerJob            *job;
+        union {
+                GsdIdentity        *identity;
+                struct {
+                        const char             *identifier;
+                        GsdIdentityInquiry     *inquiry;
+                        GsdIdentityInquiryFunc  inquiry_func;
+                        gpointer                inquiry_data;
+                        GMutex                  inquiry_lock;
+                        GCond                   inquiry_finished_condition;
+                        volatile gboolean       is_inquiring;
+                };
+        };
+} Operation;
+
+typedef struct
+{
+        GsdKerberosIdentityManager *manager;
+        GsdIdentity                *identity;
+} IdentitySignalWork;
+
+static GsdIdentityManager *gsd_kerberos_identity_manager_singleton;
+
+static void identity_manager_interface_init (GsdIdentityManagerInterface *interface);
+static void initable_interface_init (GInitableIface *interface);
+
+static void on_identity_expired (GsdIdentity                *identity,
+                                 GsdKerberosIdentityManager *self);
+
+void gsd_kerberos_identity_manager_start_test (GsdKerberosIdentityManager  *manager,
+                                               GError                     **error);
+void gsd_kerberos_identity_manager_stop_test (GsdKerberosIdentityManager  *manager,
+                                              GError                     **error);
+
+G_DEFINE_TYPE_WITH_CODE (GsdKerberosIdentityManager,
+                         gsd_kerberos_identity_manager,
+                         G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (GSD_TYPE_IDENTITY_MANAGER,
+                                                identity_manager_interface_init)
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                initable_interface_init));
+
+static Operation *
+operation_new (GsdKerberosIdentityManager *self,
+               GCancellable               *cancellable,
+               OperationType               type,
+               GSimpleAsyncResult         *result)
+{
+        Operation *operation;
+
+        operation = g_slice_new (Operation);
+
+        operation->manager = self;
+        operation->type = type;
+
+        if (cancellable == NULL) {
+                cancellable = g_cancellable_new ();
+        } else {
+                g_object_ref (cancellable);
+        }
+        operation->cancellable = cancellable;
+
+        if (result != NULL) {
+                g_object_ref (result);
+        }
+        operation->result = result;
+
+        operation->identity = NULL;
+
+        return operation;
+}
+
+static void
+operation_free (Operation *operation)
+{
+       g_clear_object (&operation->cancellable);
+
+       if (operation->type != OPERATION_TYPE_SIGN_IN &&
+           operation->type != OPERATION_TYPE_GET_IDENTITY) {
+               g_clear_object (&operation->identity);
+       } else {
+               g_clear_pointer (&operation->identifier, g_free);
+       }
+
+       g_clear_object (&operation->result);
+
+       g_slice_free (Operation, operation);
+}
+
+static void
+schedule_refresh (GsdKerberosIdentityManager *self)
+{
+        Operation *operation;
+
+        g_atomic_int_inc (&self->priv->pending_refresh_count);
+
+        operation = operation_new (self, NULL, OPERATION_TYPE_REFRESH, NULL);
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static IdentitySignalWork *
+identity_signal_work_new (GsdKerberosIdentityManager *self,
+                          GsdIdentity                *identity)
+{
+        IdentitySignalWork *work;
+
+        work = g_slice_new (IdentitySignalWork);
+        work->manager = self;
+        work->identity = g_object_ref (identity);
+
+        return work;
+}
+
+static void
+identity_signal_work_free (IdentitySignalWork *work)
+{
+        g_object_unref (work->identity);
+        g_slice_free (IdentitySignalWork, work);
+}
+
+static void
+on_identity_expired (GsdIdentity                *identity,
+                     GsdKerberosIdentityManager *self)
+{
+        _gsd_identity_manager_emit_identity_expired (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+on_identity_unexpired (GsdIdentity                *identity,
+                       GsdKerberosIdentityManager *self)
+{
+        g_debug ("GsdKerberosIdentityManager: identity unexpired");
+        /* If an identity is now unexpired, that means some sort of weird
+         * clock skew happened and we should just do a full refresh, since it's
+         * probably affected more than one identity
+         */
+        schedule_refresh (self);
+}
+
+static void
+on_identity_expiring (GsdIdentity                *identity,
+                      GsdKerberosIdentityManager *self)
+{
+        g_debug ("GsdKerberosIdentityManager: identity about to expire");
+        _gsd_identity_manager_emit_identity_expiring (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+on_identity_needs_renewal (GsdIdentity                *identity,
+                           GsdKerberosIdentityManager *self)
+{
+        g_debug ("GsdKerberosIdentityManager: identity needs renewal");
+        _gsd_identity_manager_emit_identity_needs_renewal (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+on_identity_needs_refresh (GsdIdentity                *identity,
+                           GsdKerberosIdentityManager *self)
+{
+        g_debug ("GsdKerberosIdentityManager: needs refresh");
+        schedule_refresh (self);
+}
+
+static void
+watch_for_identity_expiration (GsdKerberosIdentityManager *self,
+                               GsdIdentity                *identity)
+{
+        g_signal_handlers_disconnect_by_func (G_OBJECT (identity),
+                                              G_CALLBACK (on_identity_expired),
+                                              self);
+        g_signal_connect (G_OBJECT (identity),
+                          "expired",
+                          G_CALLBACK (on_identity_expired),
+                          self);
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (identity),
+                                              G_CALLBACK (on_identity_unexpired),
+                                              self);
+        g_signal_connect (G_OBJECT (identity),
+                          "unexpired",
+                          G_CALLBACK (on_identity_unexpired),
+                          self);
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (identity),
+                                              G_CALLBACK (on_identity_expiring),
+                                              self);
+        g_signal_connect (G_OBJECT (identity),
+                          "expiring",
+                          G_CALLBACK (on_identity_expiring),
+                          self);
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (identity),
+                                              G_CALLBACK (on_identity_needs_renewal),
+                                              self);
+        g_signal_connect (G_OBJECT (identity),
+                          "needs-renewal",
+                          G_CALLBACK (on_identity_needs_renewal),
+                          self);
+
+        g_signal_handlers_disconnect_by_func (G_OBJECT (identity),
+                                              G_CALLBACK (on_identity_needs_refresh),
+                                              self);
+        g_signal_connect (G_OBJECT (identity),
+                          "needs-refresh",
+                          G_CALLBACK (on_identity_needs_refresh),
+                          self);
+}
+
+static void
+do_identity_signal_added_work (IdentitySignalWork *work)
+{
+        GsdKerberosIdentityManager *self = work->manager;
+        GsdIdentity *identity = work->identity;
+
+        watch_for_identity_expiration (self, identity);
+        _gsd_identity_manager_emit_identity_added (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+do_identity_signal_removed_work (IdentitySignalWork *work)
+{
+        GsdKerberosIdentityManager *self = work->manager;
+        GsdIdentity *identity = work->identity;
+
+        _gsd_identity_manager_emit_identity_removed (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+do_identity_signal_renamed_work (IdentitySignalWork *work)
+{
+        GsdKerberosIdentityManager *self = work->manager;
+        GsdIdentity *identity = work->identity;
+
+        _gsd_identity_manager_emit_identity_renamed (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+do_identity_signal_refreshed_work (IdentitySignalWork *work)
+{
+        GsdKerberosIdentityManager *self = work->manager;
+        GsdIdentity *identity = work->identity;
+
+        watch_for_identity_expiration (self, identity);
+        _gsd_identity_manager_emit_identity_refreshed (GSD_IDENTITY_MANAGER (self), identity);
+}
+
+static void
+remove_identity (GsdKerberosIdentityManager *self,
+                 Operation                  *operation,
+                 GsdIdentity                *identity)
+{
+
+        IdentitySignalWork *work;
+        const char *identifier;
+        char *name;
+        GList *other_identities = NULL;
+
+        identifier = gsd_identity_get_identifier (identity);
+        name = gsd_kerberos_identity_get_realm_name (GSD_KERBEROS_IDENTITY (identity));
+
+        if (name != NULL) {
+                other_identities = g_hash_table_lookup (self->priv->identities_by_realm,
+                                                        name);
+                g_hash_table_remove (self->priv->identities_by_realm, name);
+
+                other_identities = g_list_remove (other_identities, identity);
+        }
+
+
+        if (other_identities != NULL) {
+                g_hash_table_replace (self->priv->identities_by_realm,
+                                      g_strdup (name),
+                                      other_identities);
+        }
+        g_free (name);
+
+        work = identity_signal_work_new (self, identity);
+        g_hash_table_remove (self->priv->expired_identities,
+                             identifier);
+        g_hash_table_remove (self->priv->identities,
+                             identifier);
+
+        g_io_scheduler_job_send_to_mainloop (operation->job,
+                                             (GSourceFunc)
+                                             do_identity_signal_removed_work,
+                                             work,
+                                             (GDestroyNotify)
+                                             identity_signal_work_free);
+        /* If there's only one identity for this realm now, then we can
+         * rename that identity to just the realm name
+         */
+        if (other_identities != NULL && other_identities->next == NULL) {
+                GsdIdentity *other_identity = other_identities->data;
+
+                work = identity_signal_work_new (self, other_identity);
+
+                g_io_scheduler_job_send_to_mainloop (operation->job,
+                                                     (GSourceFunc)
+                                                     do_identity_signal_renamed_work,
+                                                     work,
+                                                     (GDestroyNotify)
+                                                     identity_signal_work_free);
+        }
+}
+
+static void
+drop_stale_identities (GsdKerberosIdentityManager *self,
+                       Operation                  *operation,
+                       GHashTable                 *known_identities)
+{
+        GList *stale_identity_ids;
+        GList *node;
+
+        stale_identity_ids = g_hash_table_get_keys (self->priv->identities);
+
+        node = stale_identity_ids;
+        while (node != NULL) {
+                GsdIdentity *identity;
+                const char *identifier = node->data;
+
+                identity = g_hash_table_lookup (known_identities, identifier);
+                if (identity == NULL) {
+                        identity = g_hash_table_lookup (self->priv->identities,
+                                                        identifier);
+
+                        if (identity != NULL) {
+                                remove_identity (self, operation, identity);
+                        }
+                }
+                node = node->next;
+        }
+        g_list_free (stale_identity_ids);
+}
+
+static void
+update_identity (GsdKerberosIdentityManager *self,
+                 Operation                  *operation,
+                 GsdIdentity                *identity,
+                 GsdIdentity                *new_identity)
+{
+
+        gsd_kerberos_identity_update (GSD_KERBEROS_IDENTITY (identity),
+                                      GSD_KERBEROS_IDENTITY (new_identity));
+
+        if (gsd_identity_is_signed_in (identity)) {
+                IdentitySignalWork *work;
+
+                /* if it's not expired, send out a refresh signal */
+                g_debug ("GsdKerberosIdentityManager: identity '%s' refreshed",
+                         gsd_identity_get_identifier (identity));
+
+                work = identity_signal_work_new (self, identity);
+                g_io_scheduler_job_send_to_mainloop (operation->job,
+                                                     (GSourceFunc)
+                                                     do_identity_signal_refreshed_work,
+                                                     work,
+                                                     (GDestroyNotify)
+                                                     identity_signal_work_free);
+        }
+}
+
+static void
+add_identity (GsdKerberosIdentityManager *self,
+              Operation                  *operation,
+              GsdIdentity                *identity,
+              const char                 *identifier)
+{
+        IdentitySignalWork *work;
+
+        g_hash_table_replace (self->priv->identities,
+                              g_strdup (identifier),
+                              g_object_ref (identity));
+
+        if (!gsd_identity_is_signed_in (identity)) {
+                g_hash_table_replace (self->priv->expired_identities,
+                                      g_strdup (identifier),
+                                      identity);
+        }
+
+        work = identity_signal_work_new (self, identity);
+        g_io_scheduler_job_send_to_mainloop (operation->job,
+                                             (GSourceFunc)
+                                             do_identity_signal_added_work,
+                                             work,
+                                             (GDestroyNotify)
+                                             identity_signal_work_free);
+}
+
+static void
+refresh_identity (GsdKerberosIdentityManager *self,
+                  Operation                  *operation,
+                  GHashTable                 *refreshed_identities,
+                  GsdIdentity                *identity)
+{
+        const char *identifier;
+        GsdIdentity *old_identity;
+
+        identifier = gsd_identity_get_identifier (identity);
+
+        if (identifier == NULL) {
+                return;
+        }
+        old_identity = g_hash_table_lookup (self->priv->identities, identifier);
+
+        if (old_identity != NULL) {
+                g_debug ("GsdKerberosIdentityManager: refreshing identity '%s'", identifier);
+                update_identity (self, operation, old_identity, identity);
+
+                /* Reuse the old identity, so any object data set up on it doesn't
+                 * disappear spurriously
+                 */
+                identifier = gsd_identity_get_identifier (old_identity);
+                identity = old_identity;
+        } else {
+                g_debug ("GsdKerberosIdentityManager: adding new identity '%s'", identifier);
+                add_identity (self, operation, identity, identifier);
+        }
+
+        /* Track refreshed identities so we can emit removals when we're done fully
+         * enumerating the collection of credential caches
+         */
+        g_hash_table_replace (refreshed_identities,
+                              g_strdup (identifier),
+                              g_object_ref (identity));
+}
+
+static gboolean
+refresh_identities (GsdKerberosIdentityManager *self,
+                    Operation                  *operation)
+{
+        krb5_error_code error_code;
+        krb5_ccache cache;
+        krb5_cccol_cursor cursor;
+        const char *error_message;
+        GHashTable *refreshed_identities;
+
+        /* If we have more refreshes queued up, don't bother doing this one
+         */
+        if (!g_atomic_int_dec_and_test (&self->priv->pending_refresh_count)) {
+                return FALSE;
+        }
+
+        g_debug ("GsdKerberosIdentityManager: Refreshing identities");
+        refreshed_identities = g_hash_table_new_full (g_str_hash,
+                                                      g_str_equal,
+                                                      (GDestroyNotify)
+                                                      g_free,
+                                                      (GDestroyNotify)
+                                                      g_object_unref);
+        error_code = krb5_cccol_cursor_new (self->priv->kerberos_context, &cursor);
+
+        if (error_code != 0) {
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentityManager:         Error looking up available credential caches: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                goto done;
+        }
+
+        error_code = krb5_cccol_cursor_next (self->priv->kerberos_context,
+                                             cursor,
+                                             &cache);
+
+        while (error_code == 0 && cache != NULL) {
+                GsdIdentity *identity;
+
+                identity = gsd_kerberos_identity_new (self->priv->kerberos_context,
+                                                      cache);
+
+                if (identity != NULL) {
+                        refresh_identity (self, operation, refreshed_identities, identity);
+                }
+
+                krb5_cc_close (self->priv->kerberos_context, cache);
+                error_code = krb5_cccol_cursor_next (self->priv->kerberos_context,
+                                                     cursor,
+                                                     &cache);
+        }
+
+        if (error_code != 0) {
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentityManager:         Error iterating over available credential caches: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+        }
+
+        krb5_cccol_cursor_free (self->priv->kerberos_context, &cursor);
+done:
+        drop_stale_identities (self, operation, refreshed_identities);
+        g_hash_table_unref (refreshed_identities);
+
+        return TRUE;
+}
+
+static int
+identity_sort_func (GsdIdentity *a,
+                    GsdIdentity *b)
+{
+        return g_strcmp0 (gsd_identity_get_identifier (a),
+                          gsd_identity_get_identifier (b));
+}
+
+static void
+free_identity_list (GList *list)
+{
+        g_list_foreach (list, (GFunc) g_object_unref, NULL);
+        g_list_free (list);
+}
+
+static void
+list_identities (GsdKerberosIdentityManager *self,
+                 Operation                  *operation)
+{
+        GList *identities;
+
+        g_debug ("GsdKerberosIdentityManager: Listing identities");
+        identities = g_hash_table_get_values (self->priv->identities);
+
+        identities = g_list_sort (identities,
+                                  (GCompareFunc)
+                                  identity_sort_func);
+
+        g_list_foreach (identities, (GFunc) g_object_ref, NULL);
+        g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                   identities,
+                                                   (GDestroyNotify)
+                                                   free_identity_list);
+}
+
+static void
+renew_identity (GsdKerberosIdentityManager *self,
+                Operation                  *operation)
+{
+        GError *error;
+        gboolean was_renewed;
+        char *identity_name;
+
+        identity_name = gsd_kerberos_identity_get_principal_name (GSD_KERBEROS_IDENTITY (operation->identity));
+        g_debug ("GsdKerberosIdentityManager: renewing identity %s", identity_name);
+        g_free (identity_name);
+
+        error = NULL;
+        was_renewed = gsd_kerberos_identity_renew (GSD_KERBEROS_IDENTITY (operation->identity),
+                                                   &error);
+
+        if (!was_renewed) {
+                g_debug ("GsdKerberosIdentityManager: could not renew identity: %s",
+                         error->message);
+
+                g_simple_async_result_set_from_error (operation->result,
+                                                      error);
+        }
+
+        g_simple_async_result_set_op_res_gboolean (operation->result,
+                                                   was_renewed);
+}
+
+static void
+do_identity_inquiry (Operation *operation)
+{
+        if (operation->inquiry_func == NULL) {
+                return;
+        }
+
+        operation->inquiry_func (operation->inquiry,
+                                 operation->cancellable,
+                                 operation->inquiry_data);
+}
+
+static void
+stop_waiting_on_inquiry (Operation *operation)
+{
+        g_mutex_lock (&operation->inquiry_lock);
+        if (operation->is_inquiring) {
+                operation->is_inquiring = FALSE;
+                g_cond_signal (&operation->inquiry_finished_condition);
+        }
+        g_mutex_unlock (&operation->inquiry_lock);
+}
+
+static void
+on_kerberos_identity_inquiry_complete (GsdIdentityInquiry *inquiry,
+                                       Operation          *operation)
+{
+        stop_waiting_on_inquiry (operation);
+}
+
+static void
+start_inquiry (Operation          *operation,
+               GsdIdentityInquiry *inquiry)
+{
+        operation->is_inquiring = TRUE;
+
+        g_signal_connect (G_OBJECT (inquiry),
+                          "complete",
+                          G_CALLBACK (on_kerberos_identity_inquiry_complete),
+                          operation);
+
+        operation->inquiry = inquiry;
+        g_io_scheduler_job_send_to_mainloop (operation->job,
+                                             (GSourceFunc)
+                                             do_identity_inquiry,
+                                             operation,
+                                             (GDestroyNotify)
+                                             NULL);
+}
+
+static void
+wait_for_inquiry_to_complete (Operation                  *operation,
+                              GsdKerberosIdentityInquiry *inquiry)
+{
+        g_mutex_lock (&operation->inquiry_lock);
+        while (operation->is_inquiring) {
+                g_cond_wait (&operation->inquiry_finished_condition,
+                             &operation->inquiry_lock);
+        }
+        g_mutex_unlock (&operation->inquiry_lock);
+}
+
+static void
+on_sign_in_operation_cancelled (GCancellable *cancellable,
+                                Operation    *operation)
+{
+        stop_waiting_on_inquiry (operation);
+}
+
+static void
+on_kerberos_identity_inquiry (GsdKerberosIdentityInquiry *inquiry,
+                              GCancellable               *cancellable,
+                              Operation                  *operation)
+{
+        gulong handler_id;
+
+        start_inquiry (operation, GSD_IDENTITY_INQUIRY (inquiry));
+
+        handler_id = g_cancellable_connect (cancellable,
+                                            G_CALLBACK (on_sign_in_operation_cancelled),
+                                            operation,
+                                            NULL);
+
+        if ((operation->cancellable == NULL) ||
+            !g_cancellable_is_cancelled (operation->cancellable)) {
+                wait_for_inquiry_to_complete (operation, inquiry);
+        }
+
+        g_cancellable_disconnect (cancellable, handler_id);
+}
+static void
+get_identity (GsdKerberosIdentityManager *self,
+              Operation                  *operation)
+{
+        GsdIdentity     *identity;
+        GError          *error;
+
+        g_debug ("GsdKerberosIdentityManager: get identity %s", operation->identifier);
+        identity = g_hash_table_lookup (self->priv->identities,
+                                        operation->identifier);
+
+        if (identity == NULL) {
+                g_simple_async_result_set_error (operation->result,
+                                                 GSD_IDENTITY_MANAGER_ERROR,
+                                                 GSD_IDENTITY_MANAGER_ERROR_IDENTITY_NOT_FOUND,
+                                                 _("Could not find identity"));
+                g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                           NULL, NULL);
+
+                return;
+        }
+
+        g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                   g_object_ref (identity),
+                                                   (GDestroyNotify)
+                                                   g_object_unref);
+}
+
+static void
+sign_in_identity (GsdKerberosIdentityManager *self,
+                  Operation                  *operation)
+{
+        GsdIdentity     *identity;
+        GError          *error;
+        krb5_error_code  error_code;
+
+        g_debug ("GsdKerberosIdentityManager: signing in identity %s", operation->identifier);
+        identity = g_hash_table_lookup (self->priv->identities,
+                                        operation->identifier);
+        if (identity == NULL) {
+                krb5_ccache credentials_cache;
+                error_code = krb5_cc_new_unique (self->priv->kerberos_context,
+                                                 self->priv->credentials_cache_type,
+                                                 NULL,
+                                                 &credentials_cache);
+
+                if (error_code != 0) {
+                        const char *error_message;
+
+                        error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                        g_debug ("GsdKerberosIdentityManager:         Error creating new cache for identity credentials: %s", error_message);
+                        krb5_free_error_message (self->priv->kerberos_context, error_message);
+                } else {
+                        identity = gsd_kerberos_identity_new (self->priv->kerberos_context,
+                                                              credentials_cache);
+                        if (identity == NULL) {
+                                krb5_cc_close (self->priv->kerberos_context, credentials_cache);
+                        }
+                }
+        }
+
+        if (identity == NULL) {
+                g_simple_async_result_set_error (operation->result,
+                                                 GSD_IDENTITY_MANAGER_ERROR,
+                                                 GSD_IDENTITY_MANAGER_ERROR_CREATING_IDENTITY,
+                                                 _("Could not create identity"));
+                g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                           NULL, NULL);
+
+                return;
+        }
+
+        g_hash_table_replace (self->priv->identities,
+                              g_strdup (operation->identifier),
+                              g_object_ref (identity));
+
+        error = NULL;
+        if (!gsd_kerberos_identity_sign_in (GSD_KERBEROS_IDENTITY (identity),
+                                            operation->identifier,
+                                            (GsdIdentityInquiryFunc)
+                                            on_kerberos_identity_inquiry,
+                                            operation,
+                                            NULL,
+                                            operation->cancellable,
+                                            &error)) {
+                g_simple_async_result_set_from_error (operation->result,
+                                                      error);
+                g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                           NULL, NULL);
+
+        } else {
+                g_simple_async_result_set_op_res_gpointer (operation->result,
+                                                           g_object_ref (identity),
+                                                           (GDestroyNotify)
+                                                           g_object_unref);
+        }
+}
+
+static void
+sign_out_identity (GsdKerberosIdentityManager *self,
+                   Operation                  *operation)
+{
+        GError *error;
+        gboolean was_signed_out;
+        char *identity_name;
+
+        identity_name = gsd_kerberos_identity_get_principal_name (GSD_KERBEROS_IDENTITY (operation->identity));
+        g_debug ("GsdKerberosIdentityManager: signing out identity %s", identity_name);
+        g_free (identity_name);
+
+        error = NULL;
+        was_signed_out = gsd_kerberos_identity_erase (GSD_KERBEROS_IDENTITY (operation->identity),
+                                                      &error);
+
+        if (!was_signed_out) {
+                g_debug ("GsdKerberosIdentityManager: could not sign out identity: %s",
+                         error->message);
+                g_error_free (error);
+        }
+}
+
+static void
+block_scheduler_job (GsdKerberosIdentityManager *self)
+{
+        g_mutex_lock (&self->priv->scheduler_job_lock);
+        while (self->priv->is_blocking_scheduler_job) {
+                g_cond_wait (&self->priv->scheduler_job_unblocked, &self->priv->scheduler_job_lock);
+        }
+        self->priv->is_blocking_scheduler_job = TRUE;
+        g_mutex_unlock (&self->priv->scheduler_job_lock);
+}
+
+static void
+stop_blocking_scheduler_job (GsdKerberosIdentityManager *self)
+{
+        g_mutex_lock (&self->priv->scheduler_job_lock);
+        self->priv->is_blocking_scheduler_job = FALSE;
+        g_cond_signal (&self->priv->scheduler_job_unblocked);
+        g_mutex_unlock (&self->priv->scheduler_job_lock);
+}
+
+static void
+wait_for_scheduler_job_to_become_unblocked (GsdKerberosIdentityManager *self)
+{
+        g_mutex_lock (&self->priv->scheduler_job_lock);
+        while (self->priv->is_blocking_scheduler_job) {
+                g_cond_wait (&self->priv->scheduler_job_unblocked, &self->priv->scheduler_job_lock);
+        }
+        g_mutex_unlock (&self->priv->scheduler_job_lock);
+}
+
+static void
+on_job_cancelled (GCancellable               *cancellable,
+                  GsdKerberosIdentityManager *self)
+{
+        Operation *operation;
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_STOP_JOB,
+                                   NULL);
+        g_async_queue_push (self->priv->pending_operations, operation);
+
+        stop_blocking_scheduler_job (self);
+}
+
+static gboolean
+on_job_scheduled (GIOSchedulerJob            *job,
+                  GCancellable               *cancellable,
+                  GsdKerberosIdentityManager *self)
+{
+        GAsyncQueue *pending_operations;
+
+        g_assert (cancellable != NULL);
+
+        g_cancellable_connect (cancellable,
+                               G_CALLBACK (on_job_cancelled),
+                               self,
+                               NULL);
+
+        /* Take ownership of queue, since we may out live the identity manager */
+        pending_operations = g_async_queue_ref (self->priv->pending_operations);
+        while (!g_cancellable_is_cancelled (cancellable)) {
+                Operation *operation;
+                gboolean   processed_operation;
+                GError    *error = NULL;
+
+                operation = g_async_queue_pop (pending_operations);
+
+                if (operation->result != NULL &&
+                    g_cancellable_set_error_if_cancelled (operation->cancellable, &error)) {
+                        g_simple_async_result_take_error (operation->result,
+                                                          error);
+                        g_simple_async_result_complete_in_idle (operation->result);
+                        g_object_unref (operation->result);
+                        operation->result = NULL;
+                        continue;
+                }
+
+                operation->job = job;
+
+                switch (operation->type) {
+                        case OPERATION_TYPE_STOP_JOB:
+                                /* do nothing, loop will exit next iteration since cancellable
+                                 * is cancelled
+                                 */
+                                g_assert (g_cancellable_is_cancelled (cancellable));
+                                operation_free (operation);
+                                continue;
+                        case OPERATION_TYPE_REFRESH:
+                                processed_operation = refresh_identities (operation->manager, operation);
+                                break;
+                        case OPERATION_TYPE_GET_IDENTITY:
+                                get_identity (operation->manager, operation);
+                                processed_operation = TRUE;
+                                break;
+                        case OPERATION_TYPE_LIST:
+                                list_identities (operation->manager, operation);
+                                processed_operation = TRUE;
+
+                                /* We want to block refreshes (and their associated "added"
+                                 * and "removed" signals) until the caller has had
+                                 * a chance to look at the batch of
+                                 * results we already processed
+                                 */
+                                g_assert (operation->result != NULL);
+
+                                g_debug ("GsdKerberosIdentityManager:         Blocking until identities list processed");
+                                block_scheduler_job (self);
+                                g_object_weak_ref (G_OBJECT (operation->result),
+                                                   (GWeakNotify)
+                                                   stop_blocking_scheduler_job,
+                                                   self);
+                                g_debug ("GsdKerberosIdentityManager:         Continuing");
+                                break;
+                        case OPERATION_TYPE_SIGN_IN:
+                                sign_in_identity (operation->manager, operation);
+                                processed_operation = TRUE;
+                                break;
+                        case OPERATION_TYPE_SIGN_OUT:
+                                sign_out_identity (operation->manager, operation);
+                                processed_operation = TRUE;
+                                break;
+                        case OPERATION_TYPE_RENEW:
+                                renew_identity (operation->manager, operation);
+                                processed_operation = TRUE;
+                                break;
+                }
+
+                operation->job = NULL;
+
+                if (operation->result != NULL) {
+                        g_simple_async_result_complete_in_idle (operation->result);
+                        g_object_unref (operation->result);
+                        operation->result = NULL;
+                }
+                operation_free (operation);
+
+                wait_for_scheduler_job_to_become_unblocked (self);
+
+                /* Don't bother saying "Waiting for next operation" if this operation
+                 * was a no-op, since the debug spew probably already says the message
+                 */
+                if (processed_operation) {
+                        g_debug ("GsdKerberosIdentityManager: Waiting for next operation");
+                }
+        }
+
+        g_async_queue_unref (pending_operations);
+
+        return FALSE;
+}
+
+static void
+gsd_kerberos_identity_manager_get_identity (GsdIdentityManager     *manager,
+                                            const char             *identifier,
+                                            GCancellable           *cancellable,
+                                            GAsyncReadyCallback     callback,
+                                            gpointer                user_data)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        GSimpleAsyncResult *result;
+        Operation *operation;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            callback,
+                                            user_data,
+                                            gsd_kerberos_identity_manager_get_identity);
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_GET_IDENTITY,
+                                   result);
+        g_object_unref (result);
+
+        operation->identifier = g_strdup (identifier);
+
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static GsdIdentity *
+gsd_kerberos_identity_manager_get_identity_finish (GsdIdentityManager  *self,
+                                                   GAsyncResult        *result,
+                                                   GError             **error)
+{
+        GsdIdentity *identity;
+
+        if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+                                                   error)) {
+                return NULL;
+        }
+
+        identity = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (result));
+
+        return identity;
+}
+
+static void
+gsd_kerberos_identity_manager_list_identities (GsdIdentityManager          *manager,
+                                               GCancellable               *cancellable,
+                                               GAsyncReadyCallback         callback,
+                                               gpointer                    user_data)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        GSimpleAsyncResult *result;
+        Operation *operation;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            callback,
+                                            user_data,
+                                            gsd_kerberos_identity_manager_list_identities);
+
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_LIST,
+                                   result);
+        g_object_unref (result);
+
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static GList *
+gsd_kerberos_identity_manager_list_identities_finish (GsdIdentityManager  *manager,
+                                                      GAsyncResult        *result,
+                                                      GError             **error)
+{
+        GList *identities;
+
+        if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+                                                   error)) {
+                return NULL;
+        }
+
+        identities = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (result));
+
+        return identities;
+
+}
+
+static void
+gsd_kerberos_identity_manager_renew_identity (GsdIdentityManager         *manager,
+                                              GsdIdentity                *identity,
+                                              GCancellable               *cancellable,
+                                              GAsyncReadyCallback         callback,
+                                              gpointer                    user_data)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        GSimpleAsyncResult *result;
+        Operation *operation;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            callback,
+                                            user_data,
+                                            gsd_kerberos_identity_manager_renew_identity);
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_RENEW,
+                                   result);
+        g_object_unref (result);
+
+        operation->identity = g_object_ref (identity);
+
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static void
+gsd_kerberos_identity_manager_renew_identity_finish (GsdIdentityManager  *self,
+                                                     GAsyncResult        *result,
+                                                     GError             **error)
+{
+        if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+                                                   error)) {
+                return;
+        }
+
+        return;
+}
+
+static void
+gsd_kerberos_identity_manager_sign_identity_in (GsdIdentityManager     *manager,
+                                                const char             *identifier,
+                                                GsdIdentityInquiryFunc  inquiry_func,
+                                                gpointer                inquiry_data,
+                                                GCancellable           *cancellable,
+                                                GAsyncReadyCallback     callback,
+                                                gpointer                user_data)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        GSimpleAsyncResult *result;
+        Operation *operation;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            callback,
+                                            user_data,
+                                            gsd_kerberos_identity_manager_sign_identity_in);
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_SIGN_IN,
+                                   result);
+        g_object_unref (result);
+
+        operation->identifier = g_strdup (identifier);
+        operation->inquiry_func = inquiry_func;
+        operation->inquiry_data = inquiry_data;
+        g_mutex_init (&operation->inquiry_lock);
+        g_cond_init (&operation->inquiry_finished_condition);
+        operation->is_inquiring = FALSE;
+
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static GsdIdentity *
+gsd_kerberos_identity_manager_sign_identity_in_finish (GsdIdentityManager  *self,
+                                                       GAsyncResult        *result,
+                                                       GError             **error)
+{
+        GsdIdentity *identity;
+
+        if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+                                                   error)) {
+                return NULL;
+        }
+
+        identity = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (result));
+
+        return identity;
+}
+
+static void
+gsd_kerberos_identity_manager_sign_identity_out (GsdIdentityManager   *manager,
+                                                 GsdIdentity          *identity,
+                                                 GCancellable         *cancellable,
+                                                 GAsyncReadyCallback   callback,
+                                                 gpointer              user_data)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        GSimpleAsyncResult *result;
+        Operation *operation;
+
+        result = g_simple_async_result_new (G_OBJECT (self),
+                                            callback,
+                                            user_data,
+                                            gsd_kerberos_identity_manager_sign_identity_out);
+        operation = operation_new (self,
+                                   cancellable,
+                                   OPERATION_TYPE_SIGN_OUT,
+                                   result);
+        g_object_unref (result);
+
+        operation->identity = g_object_ref (identity);
+
+        g_async_queue_push (self->priv->pending_operations, operation);
+}
+
+static void
+gsd_kerberos_identity_manager_sign_identity_out_finish (GsdIdentityManager  *self,
+                                                        GAsyncResult        *result,
+                                                        GError             **error)
+{
+        if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+                                                   error)) {
+                return;
+        }
+
+        return;
+}
+
+static char *
+gsd_kerberos_identity_manager_name_identity (GsdIdentityManager *manager,
+                                             GsdIdentity        *identity)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (manager);
+        char *name;
+        GList *other_identities;
+        gboolean other_identity_needs_rename;
+
+        name = gsd_kerberos_identity_get_realm_name (GSD_KERBEROS_IDENTITY (identity));
+
+        if (name == NULL) {
+                return NULL;
+        }
+
+        other_identities = g_hash_table_lookup (self->priv->identities_by_realm,
+                                                name);
+
+        /* If there was already exactly one identity for this realm before,
+         * then it was going by just the realm name, so we need to rename it
+         * to use the full principle name
+         */
+        if (other_identities != NULL &&
+            other_identities->next == NULL &&
+            other_identities->data != identity) {
+                other_identity_needs_rename = TRUE;
+        }
+
+        other_identities = g_list_remove (other_identities, identity);
+        other_identities = g_list_prepend (other_identities, identity);
+
+        g_hash_table_replace (self->priv->identities_by_realm,
+                              g_strdup (name),
+                              other_identities);
+
+        if (other_identities->next != NULL) {
+                g_free (name);
+                name = gsd_kerberos_identity_get_principal_name (GSD_KERBEROS_IDENTITY (identity));
+                if (other_identity_needs_rename) {
+                        GsdIdentity *other_identity = other_identities->next->data;
+
+                        _gsd_identity_manager_emit_identity_renamed (GSD_IDENTITY_MANAGER (self),
+                                                                    other_identity);
+                }
+        }
+
+        return name;
+}
+
+static void
+identity_manager_interface_init (GsdIdentityManagerInterface *interface)
+{
+        interface->get_identity = gsd_kerberos_identity_manager_get_identity;
+        interface->get_identity_finish = gsd_kerberos_identity_manager_get_identity_finish;
+        interface->list_identities = gsd_kerberos_identity_manager_list_identities;
+        interface->list_identities_finish = gsd_kerberos_identity_manager_list_identities_finish;
+        interface->sign_identity_in = gsd_kerberos_identity_manager_sign_identity_in;
+        interface->sign_identity_in_finish = gsd_kerberos_identity_manager_sign_identity_in_finish;
+        interface->sign_identity_out = gsd_kerberos_identity_manager_sign_identity_out;
+        interface->sign_identity_out_finish = gsd_kerberos_identity_manager_sign_identity_out_finish;
+        interface->renew_identity = gsd_kerberos_identity_manager_renew_identity;
+        interface->renew_identity_finish = gsd_kerberos_identity_manager_renew_identity_finish;
+        interface->name_identity = gsd_kerberos_identity_manager_name_identity;
+}
+
+static void
+on_credentials_cache_changed (GFileMonitor               *monitor,
+                              GFile                      *file,
+                              GFile                      *other_file,
+                              GFileMonitorEvent          *event_type,
+                              GsdKerberosIdentityManager *self)
+{
+        schedule_refresh (self);
+}
+
+static gboolean
+monitor_credentials_cache (GsdKerberosIdentityManager  *self,
+                           GError                    **error)
+{
+        krb5_ccache default_cache;
+        const char *cache_type;
+        const char *cache_path;
+        GFile *file;
+        GFileMonitor *monitor;
+        krb5_error_code error_code;
+        GError *monitoring_error;
+
+        error_code = krb5_cc_default (self->priv->kerberos_context,
+                                      &default_cache);
+
+        if (error_code != 0) {
+                const char *error_message;
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+
+                g_set_error_literal (error,
+                                     GSD_IDENTITY_MANAGER_ERROR,
+                                     GSD_IDENTITY_MANAGER_ERROR_ACCESSING_CREDENTIALS,
+                                     error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+
+                return FALSE;
+        }
+
+        cache_type = krb5_cc_get_type (self->priv->kerberos_context,
+                                       default_cache);
+        g_assert (cache_type != NULL);
+
+        if (strcmp (cache_type, "FILE") != 0 &&
+            strcmp (cache_type, "DIR") != 0) {
+                g_set_error (error,
+                             GSD_IDENTITY_MANAGER_ERROR,
+                             GSD_IDENTITY_MANAGER_ERROR_UNSUPPORTED_CREDENTIALS,
+                             "Only 'FILE' and 'DIR' credential cache types are really supported, not '%s'",
+                             cache_type);
+                return FALSE;
+        }
+
+        g_free (self->priv->credentials_cache_type);
+        self->priv->credentials_cache_type = g_strdup (cache_type);
+
+        /* If we're using a FILE type credential cache, then the
+         * default cache file is the only cache we care about,
+         * and its path is what we want to monitor.
+         *
+         * If we're using a DIR type credential cache, then the default
+         * cache file is one of many possible cache files, all in the
+         * same directory.  We want to monitor that directory.
+         */
+        cache_path = krb5_cc_get_name (self->priv->kerberos_context,
+                                       default_cache);
+
+        /* The cache name might have a : in front of it.
+         * FIXME: figure out if that behavior is by design, or some
+         * odd bug.
+         */
+        if (cache_path[0] == ':') {
+                cache_path++;
+        }
+
+        file = g_file_new_for_path (cache_path);
+
+        monitoring_error = NULL;
+        if (strcmp (cache_type, "FILE") == 0) {
+                monitor = g_file_monitor_file (file,
+                                               G_FILE_MONITOR_NONE,
+                                               NULL,
+                                               &monitoring_error);
+        } else if (strcmp (cache_type, "DIR") == 0) {
+                GFile *directory;
+
+                directory = g_file_get_parent (file);
+                monitor = g_file_monitor_directory (directory,
+                                                    G_FILE_MONITOR_NONE,
+                                                    NULL,
+                                                    &monitoring_error);
+                g_object_unref (directory);
+
+        } else {
+                g_assert_not_reached ();
+        }
+        g_object_unref (file);
+
+        if (monitor == NULL) {
+                g_propagate_error (error, monitoring_error);
+                return FALSE;
+        }
+
+        self->priv->credentials_cache_changed_signal_id = g_signal_connect (G_OBJECT (monitor),
+                                                                            "changed",
+                                                                            G_CALLBACK (on_credentials_cache_changed),
+                                                                            self);
+        self->priv->credentials_cache_monitor = monitor;
+
+        return TRUE;
+}
+
+static void
+stop_watching_credentials_cache (GsdKerberosIdentityManager *self)
+{
+        if (!g_file_monitor_is_cancelled (self->priv->credentials_cache_monitor)) {
+                g_file_monitor_cancel (self->priv->credentials_cache_monitor);
+        }
+        g_object_unref (self->priv->credentials_cache_monitor);
+        self->priv->credentials_cache_monitor = NULL;
+}
+
+static gboolean
+gsd_kerberos_identity_manager_initable_init (GInitable     *initable,
+                                             GCancellable  *cancellable,
+                                             GError       **error)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (initable);
+        krb5_error_code error_code;
+        GError *monitoring_error;
+
+        if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                return FALSE;
+        }
+
+        error_code = krb5_init_context (&self->priv->kerberos_context);
+
+        if (error_code != 0) {
+                const char *error_message;
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+
+                g_set_error_literal (error,
+                                     GSD_IDENTITY_MANAGER_ERROR,
+                                     GSD_IDENTITY_MANAGER_ERROR_INITIALIZING,
+                                     error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+
+                return FALSE;
+        }
+
+        monitoring_error = NULL;
+        if (!monitor_credentials_cache (self, &monitoring_error)) {
+                g_warning ("GsdKerberosIdentityManager: Could not monitor credentials: %s",
+                           monitoring_error->message);
+                g_error_free (monitoring_error);
+        }
+
+        schedule_refresh (self);
+
+        return TRUE;
+}
+
+static void
+initable_interface_init (GInitableIface *interface)
+{
+        interface->init = gsd_kerberos_identity_manager_initable_init;
+}
+
+static void
+gsd_kerberos_identity_manager_init (GsdKerberosIdentityManager *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_KERBEROS_IDENTITY_MANAGER,
+                                                  GsdKerberosIdentityManagerPrivate);
+        self->priv->identities = g_hash_table_new_full (g_str_hash,
+                                                        g_str_equal,
+                                                        (GDestroyNotify)
+                                                        g_free,
+                                                        (GDestroyNotify)
+                                                        g_object_unref);
+        self->priv->expired_identities = g_hash_table_new_full (g_str_hash,
+                                                                g_str_equal,
+                                                                (GDestroyNotify)
+                                                                g_free,
+                                                                NULL);
+
+        self->priv->identities_by_realm = g_hash_table_new_full (g_str_hash,
+                                                                 g_str_equal,
+                                                                (GDestroyNotify)
+                                                                 g_free,
+                                                                 NULL);
+        self->priv->pending_operations = g_async_queue_new ();
+
+        g_mutex_init (&self->priv->scheduler_job_lock);
+        g_cond_init (&self->priv->scheduler_job_unblocked);
+
+        self->priv->scheduler_cancellable = g_cancellable_new ();
+        g_io_scheduler_push_job ((GIOSchedulerJobFunc)
+                                 on_job_scheduled,
+                                 self,
+                                 NULL,
+                                 G_PRIORITY_DEFAULT,
+                                 self->priv->scheduler_cancellable);
+
+}
+
+static void
+cancel_pending_operations (GsdKerberosIdentityManager *self)
+{
+        Operation *operation;
+
+        operation = g_async_queue_try_pop (self->priv->pending_operations);
+        while (operation != NULL) {
+                if (!g_cancellable_is_cancelled (operation->cancellable)) {
+                        g_cancellable_cancel (operation->cancellable);
+                }
+                operation_free (operation);
+                operation = g_async_queue_try_pop (self->priv->pending_operations);
+        }
+}
+
+static void
+gsd_kerberos_identity_manager_dispose (GObject *object)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (object);
+
+        if (self->priv->identities_by_realm != NULL) {
+                g_hash_table_unref (self->priv->identities_by_realm);
+                self->priv->identities_by_realm = NULL;
+        }
+
+        if (self->priv->expired_identities != NULL) {
+                g_hash_table_unref (self->priv->expired_identities);
+                self->priv->expired_identities = NULL;
+        }
+
+        if (self->priv->identities != NULL) {
+                g_hash_table_unref (self->priv->identities);
+                self->priv->identities = NULL;
+        }
+
+        if (self->priv->credentials_cache_monitor != NULL) {
+                stop_watching_credentials_cache (self);
+        }
+
+        if (self->priv->pending_operations != NULL) {
+                cancel_pending_operations (self);
+        }
+
+        if (self->priv->scheduler_cancellable != NULL) {
+                if (!g_cancellable_is_cancelled (self->priv->scheduler_cancellable)) {
+                        g_cancellable_cancel (self->priv->scheduler_cancellable);
+                }
+
+                g_clear_object (&self->priv->scheduler_cancellable);
+        }
+
+        /* Note, other thread may still be holding a local reference to queue
+         * while it shuts down from cancelled scheduler_cancellable above
+         */
+        if (self->priv->pending_operations != NULL) {
+                g_async_queue_unref (self->priv->pending_operations);
+                self->priv->pending_operations = NULL;
+        }
+
+        G_OBJECT_CLASS (gsd_kerberos_identity_manager_parent_class)->dispose (object);
+}
+
+static void
+gsd_kerberos_identity_manager_finalize (GObject *object)
+{
+        GsdKerberosIdentityManager *self = GSD_KERBEROS_IDENTITY_MANAGER (object);
+
+        g_free (self->priv->credentials_cache_type);
+
+        g_cond_clear (&self->priv->scheduler_job_unblocked);
+        krb5_free_context (self->priv->kerberos_context);
+
+        G_OBJECT_CLASS (gsd_kerberos_identity_manager_parent_class)->finalize (object);
+}
+
+static void
+gsd_kerberos_identity_manager_class_init (GsdKerberosIdentityManagerClass *klass)
+{
+        GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+        object_class->dispose = gsd_kerberos_identity_manager_dispose;
+        object_class->finalize = gsd_kerberos_identity_manager_finalize;
+
+        g_type_class_add_private (klass, sizeof (GsdKerberosIdentityManagerPrivate));
+}
+
+GsdIdentityManager *
+gsd_kerberos_identity_manager_new (GCancellable  *cancellable,
+                                   GError       **error)
+{
+        if (gsd_kerberos_identity_manager_singleton == NULL) {
+                GObject *object;
+
+                object = g_object_new (GSD_TYPE_KERBEROS_IDENTITY_MANAGER, NULL);
+
+                gsd_kerberos_identity_manager_singleton = GSD_IDENTITY_MANAGER (object);
+                g_object_add_weak_pointer (object, (gpointer *) &gsd_kerberos_identity_manager_singleton);
+
+                error = NULL;
+                if (!g_initable_init (G_INITABLE (object), cancellable, error)) {
+                        g_object_unref (object);
+                        return NULL;
+                }
+
+        } else {
+                if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                        return NULL;
+                }
+                g_object_ref (gsd_kerberos_identity_manager_singleton);
+        }
+
+        return gsd_kerberos_identity_manager_singleton;
+}
diff --git a/plugins/identity/gsd-kerberos-identity-manager.h b/plugins/identity/gsd-kerberos-identity-manager.h
new file mode 100644
index 00000000..43a84ba4
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity-manager.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_KERBEROS_IDENTITY_MANAGER_H__
+#define __GSD_KERBEROS_IDENTITY_MANAGER_H__
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include "gsd-identity-manager.h"
+#include "gsd-kerberos-identity.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_KERBEROS_IDENTITY_MANAGER           (gsd_kerberos_identity_manager_get_type ())
+#define GSD_KERBEROS_IDENTITY_MANAGER(obj)           (G_TYPE_CHECK_INSTANCE_CAST (obj, GSD_TYPE_KERBEROS_IDENTITY_MANAGER, GsdKerberosIdentityManager))
+#define GSD_KERBEROS_IDENTITY_MANAGER_CLASS(cls)     (G_TYPE_CHECK_CLASS_CAST (cls, GSD_TYPE_KERBEROS_IDENTITY_MANAGER, GsdKerberosIdentityManagerClass))
+#define GSD_IS_KERBEROS_IDENTITY_MANAGER(obj)        (G_TYPE_CHECK_INSTANCE_TYPE (obj, GSD_TYPE_KERBEROS_IDENTITY_MANAGER))
+#define GSD_IS_KERBEROS_IDENTITY_MANAGER_CLASS(obj)  (G_TYPE_CHECK_CLASS_TYPE (obj, GSD_TYPE_KERBEROS_IDENTITY_MANAGER))
+#define GSD_KERBEROS_IDENTITY_MANAGER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GSD_TYPE_KERBEROS_IDENTITY_MANAGER, GsdKerberosIdentityManagerClass))
+
+typedef struct _GsdKerberosIdentityManager           GsdKerberosIdentityManager;
+typedef struct _GsdKerberosIdentityManagerClass      GsdKerberosIdentityManagerClass;
+typedef struct _GsdKerberosIdentityManagerPrivate    GsdKerberosIdentityManagerPrivate; struct _GsdKerberosIdentityManager
+{
+        GObject parent_instance;
+        GsdKerberosIdentityManagerPrivate *priv;
+};
+
+struct _GsdKerberosIdentityManagerClass
+{
+        GObjectClass parent_class;
+};
+
+GType                   gsd_kerberos_identity_manager_get_type  (void);
+GsdIdentityManager*     gsd_kerberos_identity_manager_new       (GCancellable  *cancellable,
+                                                                 GError       **error);
+
+void                    gsd_kerberos_identity_manager_start_test (GsdKerberosIdentityManager  *manager,
+                                                                  GError                     **error);
+G_END_DECLS
+
+#endif /* __GSD_KERBEROS_IDENTITY_MANAGER_H__ */
diff --git a/plugins/identity/gsd-kerberos-identity.c b/plugins/identity/gsd-kerberos-identity.c
new file mode 100644
index 00000000..ac159117
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity.c
@@ -0,0 +1,1475 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Ray Strode
+ */
+
+#include "config.h"
+
+#include "gsd-identity.h"
+#include "gsd-kerberos-identity.h"
+#include "gsd-alarm.h"
+
+#include <string.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+
+typedef enum
+{
+        VERIFICATION_LEVEL_UNVERIFIED,
+        VERIFICATION_LEVEL_ERROR,
+        VERIFICATION_LEVEL_EXISTS,
+        VERIFICATION_LEVEL_SIGNED_IN
+} VerificationLevel;
+
+struct _GsdKerberosIdentityPrivate
+{
+        krb5_context        kerberos_context;
+        krb5_ccache         credentials_cache;
+
+        char               *identifier;
+        guint               identifier_idle_id;
+
+        char              **identifier_components;
+
+        krb5_timestamp      expiration_time;
+        guint               expiration_time_idle_id;
+
+        GsdAlarm           *expiration_alarm;
+        GCancellable       *expiration_alarm_cancellable;
+
+        GsdAlarm           *expiring_alarm;
+        GCancellable       *expiring_alarm_cancellable;
+
+        GsdAlarm           *renewal_alarm;
+        GCancellable       *renewal_alarm_cancellable;
+
+        VerificationLevel   cached_verification_level;
+        guint               is_signed_in_idle_id;
+};
+
+enum {
+        EXPIRING,
+        EXPIRED,
+        UNEXPIRED,
+        NEEDS_RENEWAL,
+        NEEDS_REFRESH,
+        NUMBER_OF_SIGNALS,
+};
+
+enum {
+        PROP_0,
+        PROP_IDENTIFIER,
+        PROP_IS_SIGNED_IN,
+        PROP_EXPIRATION_TIMESTAMP
+};
+
+static guint signals[NUMBER_OF_SIGNALS] = { 0 };
+
+static void identity_interface_init (GsdIdentityInterface *interface);
+static void initable_interface_init (GInitableIface *interface);
+static void reset_alarms (GsdKerberosIdentity *self);
+static void clear_alarms (GsdKerberosIdentity *self);
+static gboolean gsd_kerberos_identity_is_signed_in (GsdIdentity *identity);
+static void set_error_from_krb5_error_code (GsdKerberosIdentity  *self,
+                                            GError              **error,
+                                            gint                  code,
+                                            krb5_error_code       error_code,
+                                            const char           *format,
+                                            ...);
+
+G_LOCK_DEFINE_STATIC (identity_lock);
+
+G_DEFINE_TYPE_WITH_CODE (GsdKerberosIdentity,
+                         gsd_kerberos_identity,
+                         G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
+                                                initable_interface_init)
+                         G_IMPLEMENT_INTERFACE (GSD_TYPE_IDENTITY,
+                                                identity_interface_init));
+static void
+gsd_kerberos_identity_dispose (GObject *object)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (object);
+
+        G_LOCK (identity_lock);
+        clear_alarms (self);
+
+        g_clear_object (&self->priv->renewal_alarm);
+        g_clear_object (&self->priv->expiring_alarm);
+        g_clear_object (&self->priv->expiration_alarm);
+        G_UNLOCK (identity_lock);
+
+        if (self->priv->expiration_time_idle_id != 0) {
+                g_source_remove (self->priv->expiration_time_idle_id);
+        }
+
+        G_OBJECT_CLASS (gsd_kerberos_identity_parent_class)->dispose (object);
+
+}
+
+static void
+gsd_kerberos_identity_finalize (GObject *object)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (object);
+
+        g_free (self->priv->identifier);
+
+        if (self->priv->credentials_cache != NULL) {
+                krb5_cc_close (self->priv->kerberos_context,
+                               self->priv->credentials_cache);
+        }
+
+        G_OBJECT_CLASS (gsd_kerberos_identity_parent_class)->finalize (object);
+}
+
+static void
+gsd_kerberos_identity_get_property (GObject    *object,
+                                    guint       property_id,
+                                    GValue     *value,
+                                    GParamSpec *param_spec)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (object);
+
+        switch (property_id) {
+                case PROP_IDENTIFIER:
+                        G_LOCK (identity_lock);
+                        g_value_set_string (value,
+                                            self->priv->identifier);
+                        G_UNLOCK (identity_lock);
+                        break;
+                case PROP_IS_SIGNED_IN:
+                        g_value_set_boolean (value,
+                                             gsd_kerberos_identity_is_signed_in (GSD_IDENTITY (self)));
+                        break;
+                case PROP_EXPIRATION_TIMESTAMP:
+                        G_LOCK (identity_lock);
+                        g_value_set_int64 (value,
+                                           (gint64) self->priv->expiration_time);
+                        G_UNLOCK (identity_lock);
+                        break;
+                default:
+                        G_OBJECT_WARN_INVALID_PROPERTY_ID (object,
+                                                           property_id,
+                                                           param_spec);
+                        break;
+        }
+}
+
+static void
+gsd_kerberos_identity_class_init (GsdKerberosIdentityClass *klass)
+{
+        GObjectClass *object_class;
+
+        object_class = G_OBJECT_CLASS (klass);
+
+        object_class->dispose = gsd_kerberos_identity_dispose;
+        object_class->finalize = gsd_kerberos_identity_finalize;
+        object_class->get_property = gsd_kerberos_identity_get_property;
+
+        g_type_class_add_private (klass, sizeof (GsdKerberosIdentityPrivate));
+
+        signals[EXPIRING] = g_signal_new ("expiring",
+                                          G_TYPE_FROM_CLASS (klass),
+                                          G_SIGNAL_RUN_LAST,
+                                          0,
+                                          NULL, NULL, NULL,
+                                          G_TYPE_NONE, 0);
+        signals[EXPIRED] = g_signal_new ("expired",
+                                         G_TYPE_FROM_CLASS (klass),
+                                         G_SIGNAL_RUN_LAST,
+                                         0,
+                                         NULL, NULL, NULL,
+                                         G_TYPE_NONE, 0);
+        signals[UNEXPIRED] = g_signal_new ("unexpired",
+                                           G_TYPE_FROM_CLASS (klass),
+                                           G_SIGNAL_RUN_LAST,
+                                           0,
+                                           NULL, NULL, NULL,
+                                           G_TYPE_NONE, 0);
+        signals[NEEDS_RENEWAL] = g_signal_new ("needs-renewal",
+                                               G_TYPE_FROM_CLASS (klass),
+                                               G_SIGNAL_RUN_LAST,
+                                               0,
+                                               NULL, NULL, NULL,
+                                               G_TYPE_NONE, 0);
+        signals[NEEDS_REFRESH] = g_signal_new ("needs-refresh",
+                                               G_TYPE_FROM_CLASS (klass),
+                                               G_SIGNAL_RUN_LAST,
+                                               0,
+                                               NULL, NULL, NULL,
+                                               G_TYPE_NONE, 0);
+
+        g_object_class_override_property (object_class,
+                                          PROP_IDENTIFIER,
+                                          "identifier");
+        g_object_class_override_property (object_class,
+                                          PROP_IS_SIGNED_IN,
+                                          "is-signed-in");
+        g_object_class_override_property (object_class,
+                                          PROP_EXPIRATION_TIMESTAMP,
+                                          "expiration-timestamp");
+
+}
+
+static char *
+get_identifier (GsdKerberosIdentity  *self,
+                GError              **error)
+{
+        krb5_principal principal;
+        krb5_error_code error_code;
+        char *unparsed_name;
+        char *identifier;
+
+        if (self->priv->credentials_cache == NULL) {
+                return NULL;
+        }
+
+        error_code = krb5_cc_get_principal (self->priv->kerberos_context,
+                                            self->priv->credentials_cache,
+                                            &principal);
+
+        if (error_code != 0) {
+                if (error_code == KRB5_CC_END) {
+                        set_error_from_krb5_error_code (self,
+                                                        error,
+                                                        GSD_IDENTITY_ERROR_CREDENTIALS_UNAVAILABLE,
+                                                        error_code,
+                                                        _("Could not find identity in credential cache: %k"));
+                } else {
+                        set_error_from_krb5_error_code (self,
+                                                        error,
+                                                        GSD_IDENTITY_ERROR_ENUMERATING_CREDENTIALS,
+                                                        error_code,
+                                                        _("Could not find identity in credential cache: %k"));
+                }
+                return NULL;
+        }
+
+        error_code = krb5_unparse_name_flags (self->priv->kerberos_context,
+                                              principal,
+                                              0,
+                                              &unparsed_name);
+
+        if (error_code != 0) {
+                const char *error_message;
+
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error parsing principal identity name: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return NULL;
+        }
+
+        identifier = g_strdup (unparsed_name);
+        krb5_free_unparsed_name (self->priv->kerberos_context, unparsed_name);
+
+        return identifier;
+}
+
+static char **
+get_identifier_components (GsdKerberosIdentity *self)
+{
+        krb5_principal principal;
+        krb5_error_code error_code;
+        int size, i;
+        GPtrArray *array;
+
+        if (self->priv->identifier == NULL) {
+                return g_new0 (char *, 1);
+        }
+
+        error_code = krb5_parse_name (self->priv->kerberos_context,
+                                      self->priv->identifier,
+                                      &principal);
+
+        if (error_code != 0) {
+                const char *error_message;
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error looking up principal identity in credential cache: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return g_new0 (char *, 1);
+        }
+
+        array = g_ptr_array_new ();
+
+        g_ptr_array_add (array,
+                         g_strndup (principal->realm.data,
+                                    principal->realm.length));
+
+        size = krb5_princ_size (self->priv->kerberos_context,
+                                principal);
+
+        for (i = 0; i < size; i++) {
+                krb5_data *component;
+                char *component_string;
+
+                component = krb5_princ_component (self->priv->kerberos_context,
+                                                  principal,
+                                                  i);
+
+                component_string = g_strndup (component->data, component->length);
+                g_ptr_array_add (array, component_string);
+
+        }
+        g_ptr_array_add (array, NULL);
+
+        return (char **) g_ptr_array_free (array, FALSE);
+}
+
+static void
+gsd_kerberos_identity_init (GsdKerberosIdentity *self)
+{
+        self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                  GSD_TYPE_KERBEROS_IDENTITY,
+                                                  GsdKerberosIdentityPrivate);
+        self->priv->expiration_alarm = gsd_alarm_new ();
+        self->priv->expiring_alarm = gsd_alarm_new ();
+        self->priv->renewal_alarm = gsd_alarm_new ();
+}
+
+static void
+set_error_from_krb5_error_code (GsdKerberosIdentity  *self,
+                                GError              **error,
+                                gint                  code,
+                                krb5_error_code       error_code,
+                                const char           *format,
+                                ...)
+{
+        const char *error_message;
+        char       *literal_message;
+        char       *expanded_format;
+        va_list     args;
+        char      **chunks;
+
+        error_message = krb5_get_error_message (self->priv->kerberos_context,
+                                                error_code);
+        chunks = g_strsplit (format, "%k", -1);
+        expanded_format = g_strjoinv (error_message , chunks);
+        g_strfreev (chunks);
+        krb5_free_error_message (self->priv->kerberos_context, error_message);
+
+        va_start (args, format);
+        literal_message = g_strdup_vprintf (expanded_format, args);
+        va_end (args);
+
+        g_set_error_literal (error,
+                             GSD_IDENTITY_ERROR,
+                             code,
+                             literal_message);
+        g_free (literal_message);
+}
+
+char *
+gsd_kerberos_identity_get_principal_name (GsdKerberosIdentity *self)
+{
+        krb5_principal principal;
+        krb5_error_code error_code;
+        char *unparsed_name;
+        char *principal_name;
+        int flags;
+
+        if (self->priv->identifier == NULL) {
+                return NULL;
+        }
+
+        error_code = krb5_parse_name (self->priv->kerberos_context,
+                                      self->priv->identifier,
+                                      &principal);
+
+        if (error_code != 0) {
+                const char *error_message;
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error parsing identity %s into kerberos principal: %s",
+                         self->priv->identifier,
+                         error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return NULL;
+        }
+
+        flags = KRB5_PRINCIPAL_UNPARSE_DISPLAY;
+        error_code = krb5_unparse_name_flags (self->priv->kerberos_context,
+                                              principal,
+                                              flags,
+                                              &unparsed_name);
+
+        if (error_code != 0) {
+                const char *error_message;
+
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error parsing principal identity name: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return NULL;
+        }
+
+        principal_name = g_strdup (unparsed_name);
+        krb5_free_unparsed_name (self->priv->kerberos_context, unparsed_name);
+
+        return principal_name;
+}
+
+char *
+gsd_kerberos_identity_get_realm_name (GsdKerberosIdentity *self)
+{
+        krb5_principal principal;
+        krb5_error_code error_code;
+        krb5_data *realm;
+        char *realm_name;
+
+        if (self->priv->identifier == NULL) {
+                return NULL;
+        }
+
+        error_code = krb5_parse_name (self->priv->kerberos_context,
+                                      self->priv->identifier,
+                                      &principal);
+
+        if (error_code != 0) {
+                const char *error_message;
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error parsing identity %s into kerberos principal: %s",
+                         self->priv->identifier,
+                         error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return NULL;
+        }
+
+        realm = krb5_princ_realm (self->priv->kerberos_context,
+                                  principal);
+        realm_name = g_strndup (realm->data, realm->length);
+        krb5_free_principal (self->priv->kerberos_context, principal);
+
+        return realm_name;
+}
+
+static const char *
+gsd_kerberos_identity_get_identifier (GsdIdentity *identity)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (identity);
+
+        return self->priv->identifier;
+}
+
+static char **
+gsd_kerberos_identity_get_identifier_components (GsdIdentity *identity)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (identity);
+
+        return g_strdupv (self->priv->identifier_components);
+}
+
+static gboolean
+credentials_validate_existence (GsdKerberosIdentity *self,
+                                krb5_principal      principal,
+                                krb5_creds         *credentials)
+{
+        /* Checks if default principal associated with the cache has a valid
+         * ticket granting ticket in the passed in credentials
+         */
+
+        if (krb5_is_config_principal (self->priv->kerberos_context,
+                                      credentials->server)) {
+                return FALSE;
+        }
+
+        /* looking for the krbtgt / REALM pair, so it should be exactly 2 items */
+        if (krb5_princ_size (self->priv->kerberos_context,
+                             credentials->server) != 2) {
+                return FALSE;
+        }
+
+        if (!krb5_realm_compare (self->priv->kerberos_context,
+                                 credentials->server,
+                                 principal)) {
+                /* credentials are from some other realm */
+                return FALSE;
+        }
+
+        if (strncmp (credentials->server->data[0].data,
+                     KRB5_TGS_NAME,
+                     credentials->server->data[0].length) != 0) {
+                /* credentials aren't for ticket granting */
+                return FALSE;
+        }
+
+        if (credentials->server->data[1].length != principal->realm.length ||
+            memcmp (credentials->server->data[1].data,
+                    principal->realm.data,
+                    principal->realm.length) != 0) {
+                /* credentials are for some other realm */
+                return FALSE;
+        }
+
+        return TRUE;
+}
+
+static krb5_timestamp
+get_current_time (GsdKerberosIdentity *self)
+{
+        krb5_timestamp  current_time;
+        krb5_error_code error_code;
+
+        error_code = krb5_timeofday (self->priv->kerberos_context,
+                                     &current_time);
+
+        if (error_code != 0) {
+                const char *error_message;
+
+                error_message = krb5_get_error_message (self->priv->kerberos_context, error_code);
+                g_debug ("GsdKerberosIdentity: Error getting current time: %s", error_message);
+                krb5_free_error_message (self->priv->kerberos_context, error_message);
+                return 0;
+        }
+
+        return current_time;
+}
+
+typedef struct
+{
+        GsdKerberosIdentity *self;
+        guint               *idle_id;
+        const char          *property_name;
+} NotifyRequest;
+
+static void
+clear_idle_id (NotifyRequest *request)
+{
+        *request->idle_id = 0;
+        g_slice_free (NotifyRequest, request);
+}
+
+static gboolean
+on_notify_queued (NotifyRequest *request)
+{
+        g_object_notify (G_OBJECT (request->self),
+                         request->property_name);
+
+        return FALSE;
+}
+
+static void
+queue_notify (GsdKerberosIdentity *self,
+              guint               *idle_id,
+              const char          *property_name)
+{
+        NotifyRequest *request;
+
+        if (*idle_id != 0) {
+                return;
+        }
+
+        request = g_slice_new0 (NotifyRequest);
+        request->self = self;
+        request->idle_id = idle_id;
+        request->property_name = property_name;
+
+        *idle_id = g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
+                                    (GSourceFunc)
+                                    on_notify_queued,
+                                    request,
+                                    (GDestroyNotify)
+                                    clear_idle_id);
+}
+
+static void
+set_expiration_time (GsdKerberosIdentity *self,
+                     krb5_timestamp       expiration_time)
+{
+        if (self->priv->expiration_time != expiration_time) {
+                self->priv->expiration_time = expiration_time;
+                queue_notify (self,
+                              &self->priv->expiration_time_idle_id,
+                              "expiration-timestamp");
+        }
+}
+
+static gboolean
+credentials_are_expired (GsdKerberosIdentity *self,
+                         krb5_creds          *credentials)
+{
+        krb5_timestamp  current_time;
+
+        current_time = get_current_time (self);
+
+        set_expiration_time (self, MAX (credentials->times.endtime,
+                                        self->priv->expiration_time));
+
+        if (credentials->times.endtime <= current_time) {
+                return TRUE;
+        }
+
+        return FALSE;
+}
+
+static VerificationLevel
+verify_identity (GsdKerberosIdentity  *self,
+                 GError              **error)
+{
+        krb5_principal principal;
+        krb5_cc_cursor cursor;
+        krb5_creds credentials;
+        krb5_error_code error_code;
+        VerificationLevel verification_level;
+
+        set_expiration_time (self, 0);
+
+        if (self->priv->credentials_cache == NULL) {
+                return VERIFICATION_LEVEL_UNVERIFIED;
+        }
+
+        error_code = krb5_cc_get_principal (self->priv->kerberos_context,
+                                            self->priv->credentials_cache,
+                                            &principal);
+
+        if (error_code != 0) {
+                if (error_code == KRB5_CC_END) {
+                        return VERIFICATION_LEVEL_UNVERIFIED;
+                }
+
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_NOT_FOUND,
+                                                error_code,
+                                                _("Could not find identity in credential cache: %k"));
+                return VERIFICATION_LEVEL_ERROR;
+        }
+
+        error_code = krb5_cc_start_seq_get (self->priv->kerberos_context,
+                                            self->priv->credentials_cache,
+                                            &cursor);
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_CREDENTIALS_UNAVAILABLE,
+                                                error_code,
+                                                _("Could not find identity credentials in cache: %k"));
+
+                verification_level = VERIFICATION_LEVEL_ERROR;
+                goto out;
+        }
+
+        verification_level = VERIFICATION_LEVEL_UNVERIFIED;
+
+        error_code = krb5_cc_next_cred (self->priv->kerberos_context,
+                                        self->priv->credentials_cache,
+                                        &cursor,
+                                        &credentials);
+
+        while (error_code == 0) {
+                if (credentials_validate_existence (self, principal, &credentials)) {
+                        if (!credentials_are_expired (self, &credentials)) {
+                                verification_level = VERIFICATION_LEVEL_SIGNED_IN;
+                        } else {
+                                verification_level = VERIFICATION_LEVEL_EXISTS;
+                        }
+                }
+
+                error_code = krb5_cc_next_cred (self->priv->kerberos_context,
+                                                self->priv->credentials_cache,
+                                                &cursor,
+                                                &credentials);
+        }
+
+        if (error_code != KRB5_CC_END) {
+                verification_level = VERIFICATION_LEVEL_ERROR;
+
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_ENUMERATING_CREDENTIALS,
+                                                error_code,
+                                                _("Could not sift through identity credentials in cache: %k"));
+                goto out;
+        }
+
+        error_code = krb5_cc_end_seq_get (self->priv->kerberos_context,
+                                          self->priv->credentials_cache,
+                                          &cursor);
+
+        if (error_code != 0) {
+                verification_level = VERIFICATION_LEVEL_ERROR;
+
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_ENUMERATING_CREDENTIALS,
+                                                error_code,
+                                                _("Could not finish up sifting through identity credentials in cache: %k"));
+                goto out;
+        }
+out:
+        krb5_free_principal (self->priv->kerberos_context, principal);
+        return verification_level;
+}
+
+static gboolean
+gsd_kerberos_identity_is_signed_in (GsdIdentity *identity)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (identity);
+        gboolean is_signed_in = FALSE;
+
+        G_LOCK (identity_lock);
+        if (self->priv->cached_verification_level == VERIFICATION_LEVEL_SIGNED_IN) {
+                is_signed_in = TRUE;
+        }
+        G_UNLOCK (identity_lock);
+
+        return is_signed_in;
+}
+
+static void
+identity_interface_init (GsdIdentityInterface *interface)
+{
+        interface->get_identifier = gsd_kerberos_identity_get_identifier;
+        interface->get_identifier_components = gsd_kerberos_identity_get_identifier_components;
+        interface->is_signed_in = gsd_kerberos_identity_is_signed_in;
+}
+
+static void
+on_expiration_alarm_fired (GsdAlarm            *alarm,
+                           GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_debug ("GsdKerberosIdentity: expiration alarm fired for identity %s",
+                 gsd_identity_get_identifier (GSD_IDENTITY (self)));
+        g_signal_emit (G_OBJECT (self), signals[NEEDS_REFRESH], 0);
+}
+
+static void
+on_expiration_alarm_rearmed (GsdAlarm            *alarm,
+                             GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_debug ("GsdKerberosIdentity: expiration alarm rearmed");
+        g_signal_emit (G_OBJECT (self), signals[NEEDS_REFRESH], 0);
+}
+
+static void
+on_renewal_alarm_rearmed (GsdAlarm            *alarm,
+                          GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_debug ("GsdKerberosIdentity: renewal alarm rearmed");
+}
+
+static void
+on_renewal_alarm_fired (GsdAlarm            *alarm,
+                        GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_clear_object (&self->priv->renewal_alarm_cancellable);
+
+        if (self->priv->cached_verification_level == VERIFICATION_LEVEL_SIGNED_IN) {
+                g_debug ("GsdKerberosIdentity: renewal alarm fired for signed-in identity");
+                g_signal_emit (G_OBJECT (self), signals[NEEDS_RENEWAL], 0);
+        }
+}
+
+static void
+on_expiring_alarm_rearmed (GsdAlarm            *alarm,
+                           GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_debug ("GsdKerberosIdentity: expiring alarm rearmed");
+}
+
+static void
+on_expiring_alarm_fired (GsdAlarm            *alarm,
+                         GsdKerberosIdentity *self)
+{
+        g_return_if_fail (GSD_IS_ALARM (alarm));
+        g_return_if_fail (GSD_IS_KERBEROS_IDENTITY (self));
+
+        g_clear_object (&self->priv->expiring_alarm_cancellable);
+
+        if (self->priv->cached_verification_level == VERIFICATION_LEVEL_SIGNED_IN) {
+                g_debug ("GsdKerberosIdentity: expiring alarm fired for signed-in identity");
+                g_signal_emit (G_OBJECT (self), signals[EXPIRING], 0);
+        }
+}
+
+static void
+set_alarm (GsdKerberosIdentity  *self,
+           GsdAlarm             *alarm,
+           GDateTime            *alarm_time,
+           GCancellable        **cancellable)
+{
+        GDateTime *old_alarm_time;
+
+        G_LOCK (identity_lock);
+        old_alarm_time = gsd_alarm_get_time (alarm);
+        if (old_alarm_time == NULL ||
+            !g_date_time_equal (alarm_time, old_alarm_time)) {
+                GCancellable *new_cancellable;
+
+                new_cancellable = g_cancellable_new ();
+                gsd_alarm_set_time (alarm,
+                                    alarm_time,
+                                    new_cancellable);
+                g_date_time_unref (alarm_time);
+
+                g_clear_object (cancellable);
+                *cancellable = new_cancellable;
+        }
+        G_UNLOCK (identity_lock);
+
+}
+
+static void
+disconnect_alarm_signals (GsdKerberosIdentity *self)
+{
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->renewal_alarm),
+                                              G_CALLBACK (on_renewal_alarm_fired),
+                                              self);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->renewal_alarm),
+                                              G_CALLBACK (on_renewal_alarm_rearmed),
+                                              self);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->expiring_alarm),
+                                              G_CALLBACK (on_expiring_alarm_fired),
+                                              self);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->expiration_alarm),
+                                              G_CALLBACK (on_expiration_alarm_rearmed),
+                                              self);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->expiration_alarm),
+                                              G_CALLBACK (on_expiration_alarm_fired),
+                                              self);
+        g_signal_handlers_disconnect_by_func (G_OBJECT (self->priv->expiring_alarm),
+                                              G_CALLBACK (on_expiring_alarm_rearmed),
+                                              self);
+}
+
+static void
+connect_alarm_signals (GsdKerberosIdentity *self)
+{
+        g_signal_connect (G_OBJECT (self->priv->renewal_alarm),
+                          "fired",
+                          G_CALLBACK (on_renewal_alarm_fired),
+                          self);
+        g_signal_connect (G_OBJECT (self->priv->renewal_alarm),
+                          "rearmed",
+                          G_CALLBACK (on_renewal_alarm_rearmed),
+                          self);
+        g_signal_connect (G_OBJECT (self->priv->expiring_alarm),
+                          "fired",
+                          G_CALLBACK (on_expiring_alarm_fired),
+                          self);
+        g_signal_connect (G_OBJECT (self->priv->expiring_alarm),
+                          "rearmed",
+                          G_CALLBACK (on_expiring_alarm_rearmed),
+                          self);
+        g_signal_connect (G_OBJECT (self->priv->expiration_alarm),
+                          "fired",
+                          G_CALLBACK (on_expiration_alarm_fired),
+                          self);
+        g_signal_connect (G_OBJECT (self->priv->expiration_alarm),
+                          "rearmed",
+                          G_CALLBACK (on_expiration_alarm_rearmed),
+                          self);
+}
+
+static void
+reset_alarms (GsdKerberosIdentity *self)
+{
+        GDateTime    *now;
+        GDateTime    *expiration_time;
+        GDateTime    *expiring_time;
+        GDateTime    *renewal_time;
+        GTimeSpan     time_span_until_expiration;
+
+        now = g_date_time_new_now_local ();
+        expiration_time = g_date_time_new_from_unix_local (self->priv->expiration_time);
+        time_span_until_expiration = g_date_time_difference (expiration_time, now);
+
+        /* Let the user reauthenticate 10 min before expiration */
+        expiring_time = g_date_time_add_minutes (expiration_time, -10);
+
+        /* Try to quietly auto-renew halfway through so in ideal configurations
+         * the ticket is never more than halfway to expired
+         */
+        renewal_time = g_date_time_add (expiration_time,
+                                        - (time_span_until_expiration / 2));
+
+        disconnect_alarm_signals (self);
+
+        set_alarm (self,
+                   self->priv->renewal_alarm,
+                   renewal_time,
+                   &self->priv->renewal_alarm_cancellable);
+        set_alarm (self,
+                   self->priv->expiring_alarm,
+                   expiring_time,
+                   &self->priv->expiring_alarm_cancellable);
+        set_alarm (self,
+                   self->priv->expiration_alarm,
+                   expiration_time,
+                   &self->priv->expiration_alarm_cancellable);
+
+        connect_alarm_signals (self);
+}
+
+static void
+cancel_and_clear_cancellable (GCancellable **cancellable)
+{
+        if (cancellable == NULL) {
+                return;
+        }
+
+        if (!g_cancellable_is_cancelled (*cancellable)) {
+            g_cancellable_cancel (*cancellable);
+        }
+
+        g_clear_object (cancellable);
+}
+
+static void
+clear_alarms (GsdKerberosIdentity *self)
+{
+        cancel_and_clear_cancellable (&self->priv->renewal_alarm_cancellable);
+        cancel_and_clear_cancellable (&self->priv->expiring_alarm_cancellable);
+        cancel_and_clear_cancellable (&self->priv->expiration_alarm_cancellable);
+}
+
+static gboolean
+gsd_kerberos_identity_initable_init (GInitable      *initable,
+                                     GCancellable   *cancellable,
+                                     GError        **error)
+{
+        GsdKerberosIdentity *self = GSD_KERBEROS_IDENTITY (initable);
+        GError *verification_error;
+
+        if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                return FALSE;
+        }
+
+        if (self->priv->identifier == NULL) {
+                self->priv->identifier = get_identifier (self, error);
+
+                if (self->priv->identifier == NULL) {
+                        return FALSE;
+                }
+
+                queue_notify (self,
+                              &self->priv->identifier_idle_id,
+                              "identifier");
+        }
+
+        if (self->priv->identifier_components == NULL) {
+                self->priv->identifier_components = get_identifier_components (self);
+        }
+
+        verification_error = NULL;
+        self->priv->cached_verification_level = verify_identity (self, &verification_error);
+
+        switch (self->priv->cached_verification_level) {
+                case VERIFICATION_LEVEL_EXISTS:
+                case VERIFICATION_LEVEL_SIGNED_IN:
+                        reset_alarms (self);
+
+                        queue_notify (self,
+                                      &self->priv->is_signed_in_idle_id,
+                                      "is-signed-in");
+                        return TRUE;
+
+                case VERIFICATION_LEVEL_UNVERIFIED:
+                        return TRUE;
+
+                case VERIFICATION_LEVEL_ERROR:
+                        if (verification_error != NULL) {
+                                g_propagate_error (error, verification_error);
+                                return FALSE;
+                        }
+                default:
+                        g_set_error (error,
+                                     GSD_IDENTITY_ERROR,
+                                     GSD_IDENTITY_ERROR_VERIFYING,
+                                     _("No associated identification found"));
+                    return FALSE;
+
+        }
+}
+
+static void
+initable_interface_init (GInitableIface *interface)
+{
+        interface->init = gsd_kerberos_identity_initable_init;
+}
+
+typedef struct
+{
+        GsdKerberosIdentity    *identity;
+        GsdIdentityInquiryFunc  inquiry_func;
+        gpointer                inquiry_data;
+        GDestroyNotify          destroy_notify;
+        GCancellable           *cancellable;
+} SignInOperation;
+
+static krb5_error_code
+on_kerberos_inquiry (krb5_context     kerberos_context,
+                     SignInOperation *operation,
+                     const char      *name,
+                     const char      *banner,
+                     int              number_of_prompts,
+                     krb5_prompt      prompts[])
+{
+        GsdIdentityInquiry *inquiry;
+        krb5_error_code     error_code;
+
+        inquiry = gsd_kerberos_identity_inquiry_new (operation->identity,
+                                                     name,
+                                                     banner,
+                                                     prompts,
+                                                     number_of_prompts);
+
+        operation->inquiry_func (inquiry,
+                                 operation->cancellable,
+                                 operation->inquiry_data);
+
+        if (g_cancellable_is_cancelled (operation->cancellable)) {
+                error_code = KRB5_LIBOS_PWDINTR;
+        } else if (!gsd_identity_inquiry_is_complete (inquiry)) {
+                error_code = KRB5_LIBOS_PWDINTR;
+        } else {
+                error_code = 0;
+        }
+
+        g_object_unref (inquiry);
+
+        return error_code;
+}
+
+static gboolean
+gsd_kerberos_identity_update_credentials (GsdKerberosIdentity  *self,
+                                          krb5_principal        principal,
+                                          krb5_creds           *new_credentials,
+                                          GError              **error)
+{
+        krb5_error_code error_code;
+
+        error_code = krb5_cc_initialize (self->priv->kerberos_context,
+                                         self->priv->credentials_cache,
+                                         principal);
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_ALLOCATING_CREDENTIALS,
+                                                error_code,
+                                                _("Could not initialize credentials cache: %k"));
+
+                krb5_free_cred_contents (self->priv->kerberos_context, new_credentials);
+                goto out;
+        }
+
+        error_code = krb5_cc_store_cred (self->priv->kerberos_context,
+                                         self->priv->credentials_cache,
+                                         new_credentials);
+
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_SAVING_CREDENTIALS,
+                                                error_code,
+                                                _("Could not store new credentials in credentials cache: %k"));
+
+                krb5_free_cred_contents (self->priv->kerberos_context, new_credentials);
+                goto out;
+        }
+        krb5_free_cred_contents (self->priv->kerberos_context, new_credentials);
+
+        return TRUE;
+out:
+        return FALSE;
+}
+
+static SignInOperation *
+sign_in_operation_new (GsdKerberosIdentity    *identity,
+                       GsdIdentityInquiryFunc  inquiry_func,
+                       gpointer                inquiry_data,
+                       GDestroyNotify          destroy_notify,
+                       GCancellable           *cancellable)
+{
+        SignInOperation *operation;
+
+        operation = g_slice_new0 (SignInOperation);
+        operation->identity = g_object_ref (identity);
+        operation->inquiry_func = inquiry_func;
+        operation->inquiry_data = inquiry_data;
+        operation->destroy_notify = destroy_notify;
+
+        if (cancellable == NULL) {
+                operation->cancellable = g_cancellable_new ();
+        } else {
+                operation->cancellable = g_object_ref (cancellable);
+        }
+
+        return operation;
+}
+
+static void
+sign_in_operation_free (SignInOperation *operation)
+{
+        g_object_unref (operation->identity);
+        g_object_unref (operation->cancellable);
+
+        g_slice_free (SignInOperation, operation);
+}
+
+gboolean
+gsd_kerberos_identity_sign_in (GsdKerberosIdentity     *self,
+                               const char              *principal_name,
+                               GsdIdentityInquiryFunc   inquiry_func,
+                               gpointer                 inquiry_data,
+                               GDestroyNotify           destroy_notify,
+                               GCancellable            *cancellable,
+                               GError                 **error)
+{
+        SignInOperation         *operation;
+        krb5_principal           principal;
+        krb5_error_code          error_code;
+        krb5_creds               new_credentials;
+        krb5_get_init_creds_opt *options;
+        krb5_deltat              start_time;
+        char                    *service_name;
+        char                    *password;
+        gboolean                 signed_in;
+
+        if (g_cancellable_set_error_if_cancelled (cancellable, error)) {
+                return FALSE;
+        }
+
+        error_code = krb5_get_init_creds_opt_alloc (self->priv->kerberos_context,
+                                                    &options);
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_ALLOCATING_CREDENTIALS,
+                                                error_code,
+                                                "%k");
+                if (destroy_notify) {
+                        destroy_notify (inquiry_data);
+                }
+                return FALSE;
+        }
+
+        signed_in = FALSE;
+
+        operation = sign_in_operation_new (self,
+                                           inquiry_func,
+                                           inquiry_data,
+                                           destroy_notify,
+                                           cancellable);
+
+        if (g_strcmp0 (self->priv->identifier, principal_name) != 0) {
+                g_free (self->priv->identifier);
+                self->priv->identifier = g_strdup (principal_name);
+        }
+
+        error_code = krb5_parse_name (self->priv->kerberos_context,
+                                      principal_name,
+                                      &principal);
+
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_PARSING_IDENTIFIER,
+                                                error_code,
+                                                "%k");
+                if (destroy_notify) {
+                        destroy_notify (inquiry_data);
+                }
+                return FALSE;
+        }
+
+        /* FIXME: get from keyring if so configured */
+        password = NULL;
+
+        krb5_get_init_creds_opt_set_forwardable (options, TRUE);
+        krb5_get_init_creds_opt_set_proxiable (options, TRUE);
+        krb5_get_init_creds_opt_set_renew_life (options, G_MAXINT);
+
+        start_time = 0;
+        service_name = NULL;
+        error_code = krb5_get_init_creds_password (self->priv->kerberos_context,
+                                                   &new_credentials,
+                                                   principal,
+                                                   password,
+                                                   (krb5_prompter_fct)
+                                                   on_kerberos_inquiry,
+                                                   operation,
+                                                   start_time,
+                                                   service_name,
+                                                   options);
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_AUTHENTICATION_FAILED,
+                                                error_code,
+                                                "%k");
+                if (destroy_notify) {
+                        destroy_notify (inquiry_data);
+                }
+                sign_in_operation_free (operation);
+
+                krb5_free_principal (self->priv->kerberos_context, principal);
+                goto done;
+        }
+
+        if (destroy_notify) {
+                destroy_notify (inquiry_data);
+        }
+        sign_in_operation_free (operation);
+
+        if (!gsd_kerberos_identity_update_credentials (self,
+                                                       principal,
+                                                       &new_credentials,
+                                                       error)) {
+                krb5_free_principal (self->priv->kerberos_context, principal);
+                goto done;
+        }
+        krb5_free_principal (self->priv->kerberos_context, principal);
+
+        g_debug ("GsdKerberosIdentity: identity signed in");
+        signed_in = TRUE;
+done:
+
+        return signed_in;
+}
+
+static void
+update_identifier (GsdKerberosIdentity *self,
+                   GsdKerberosIdentity *new_identity)
+{
+        char *new_identifier;
+
+        new_identifier = get_identifier (self, NULL);
+        if (g_strcmp0 (self->priv->identifier, new_identifier) != 0) {
+                g_free (self->priv->identifier);
+                self->priv->identifier = new_identifier;
+                queue_notify (self,
+                              &self->priv->identifier_idle_id,
+                              "identifier");
+        } else {
+                g_free (new_identifier);
+        }
+}
+
+static void
+update_identifier_components (GsdKerberosIdentity *self,
+                              GsdKerberosIdentity *new_identity)
+{
+        char **new_components;
+
+        new_components = get_identifier_components (self);
+
+        if (g_strv_length (self->priv->identifier_components) ==
+            g_strv_length (new_components)) {
+                int i;
+
+                for (i = 0; new_components[i] != NULL; i++) {
+                        if (g_strcmp0 (self->priv->identifier_components[i],
+                                       new_components[i]) != 0) {
+                                break;
+                        } else {
+                                g_strfreev (new_components);
+                                return;
+                        }
+                }
+        }
+
+        g_strfreev (self->priv->identifier_components);
+        self->priv->identifier_components = new_components;
+}
+
+void
+gsd_kerberos_identity_update (GsdKerberosIdentity *self,
+                              GsdKerberosIdentity *new_identity)
+{
+        VerificationLevel verification_level;
+
+        if (self->priv->credentials_cache != NULL) {
+                krb5_cc_close (self->priv->kerberos_context, self->priv->credentials_cache);
+        }
+
+        krb5_cc_dup (new_identity->priv->kerberos_context,
+                     new_identity->priv->credentials_cache,
+                     &self->priv->credentials_cache);
+
+        G_LOCK (identity_lock);
+        update_identifier (self, new_identity);
+        update_identifier_components (self, new_identity);
+        G_UNLOCK (identity_lock);
+
+        verification_level = verify_identity (self, NULL);
+
+        if (verification_level == VERIFICATION_LEVEL_SIGNED_IN) {
+                reset_alarms (self);
+        } else {
+                clear_alarms (self);
+        }
+
+        if (verification_level != self->priv->cached_verification_level) {
+                if (self->priv->cached_verification_level == VERIFICATION_LEVEL_SIGNED_IN &&
+                    verification_level == VERIFICATION_LEVEL_EXISTS) {
+
+                        G_LOCK (identity_lock);
+                        self->priv->cached_verification_level = verification_level;
+                        G_UNLOCK (identity_lock);
+
+                        g_signal_emit (G_OBJECT (self), signals[EXPIRED], 0);
+                } if (self->priv->cached_verification_level == VERIFICATION_LEVEL_EXISTS &&
+                      verification_level == VERIFICATION_LEVEL_SIGNED_IN) {
+
+                        G_LOCK (identity_lock);
+                        self->priv->cached_verification_level = verification_level;
+                        G_UNLOCK (identity_lock);
+
+                        g_signal_emit (G_OBJECT (self), signals[UNEXPIRED], 0);
+                }
+                queue_notify (self,
+                              &self->priv->is_signed_in_idle_id,
+                              "is-signed-in");
+        }
+}
+
+gboolean
+gsd_kerberos_identity_renew (GsdKerberosIdentity  *self,
+                             GError              **error)
+{
+        krb5_error_code error_code = 0;
+        krb5_principal principal;
+        krb5_creds new_credentials;
+        gboolean renewed = FALSE;
+        char *name = NULL;
+
+        if (self->priv->credentials_cache == NULL) {
+                g_set_error (error,
+                             GSD_IDENTITY_ERROR,
+                             GSD_IDENTITY_ERROR_CREDENTIALS_UNAVAILABLE,
+                             _("Could not renew identitys: Not signed in"));
+                goto out;
+        }
+
+        error_code = krb5_cc_get_principal (self->priv->kerberos_context,
+                                            self->priv->credentials_cache,
+                                            &principal);
+
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_CREDENTIALS_UNAVAILABLE,
+                                                error_code,
+                                                _("Could not renew identity: %k"));
+                goto out;
+        }
+
+        name = gsd_kerberos_identity_get_principal_name (self);
+
+        error_code = krb5_get_renewed_creds (self->priv->kerberos_context,
+                                             &new_credentials,
+                                             principal,
+                                             self->priv->credentials_cache,
+                                             NULL);
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_RENEWING,
+                                                error_code,
+                                                _("Could not get new credentials to renew identity %s: %k"),
+                                                name);
+                krb5_free_principal (self->priv->kerberos_context, principal);
+                goto out;
+        }
+
+        if (!gsd_kerberos_identity_update_credentials (self,
+                                                       principal,
+                                                       &new_credentials,
+                                                       error)) {
+                krb5_free_principal (self->priv->kerberos_context, principal);
+                goto out;
+        }
+
+        g_debug ("GsdKerberosIdentity: identity %s renewed", name);
+        renewed = TRUE;
+out:
+        g_free (name);
+
+        return renewed;
+}
+
+gboolean
+gsd_kerberos_identity_erase  (GsdKerberosIdentity  *self,
+                              GError              **error)
+{
+        krb5_error_code error_code = 0;
+
+        if (self->priv->credentials_cache != NULL) {
+                error_code = krb5_cc_destroy (self->priv->kerberos_context,
+                                              self->priv->credentials_cache);
+                self->priv->credentials_cache = NULL;
+        }
+
+        if (error_code != 0) {
+                set_error_from_krb5_error_code (self,
+                                                error,
+                                                GSD_IDENTITY_ERROR_REMOVING_CREDENTIALS,
+                                                error_code,
+                                                _("Could not erase identity: %k"));
+                return FALSE;
+        }
+
+        return TRUE;
+}
+
+GsdIdentity *
+gsd_kerberos_identity_new (krb5_context context,
+                           krb5_ccache  cache)
+{
+        GsdKerberosIdentity *self;
+        GError *error;
+
+        self = GSD_KERBEROS_IDENTITY (g_object_new (GSD_TYPE_KERBEROS_IDENTITY, NULL));
+
+        krb5_cc_dup (context,
+                     cache,
+                     &self->priv->credentials_cache);
+        self->priv->kerberos_context = context;
+
+        error = NULL;
+        if (!g_initable_init (G_INITABLE (self), NULL, &error)) {
+                const char *name;
+
+                name = krb5_cc_get_name (context,
+                                         cache);
+                g_debug ("Could not build identity%s%s: %s",
+                         name != NULL? " from credentials cache " : "",
+                         name != NULL? name : "",
+                         error->message);
+                g_error_free (error);
+                g_object_unref (self);
+                return NULL;
+        }
+
+        return GSD_IDENTITY (self);
+}
diff --git a/plugins/identity/gsd-kerberos-identity.h b/plugins/identity/gsd-kerberos-identity.h
new file mode 100644
index 00000000..abe6df1e
--- /dev/null
+++ b/plugins/identity/gsd-kerberos-identity.h
@@ -0,0 +1,88 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: Ray Strode
+ */
+
+#ifndef __GSD_KERBEROS_IDENTITY_H__
+#define __GSD_KERBEROS_IDENTITY_H__
+
+#include <glib.h>
+#include <glib-object.h>
+
+#include <krb5.h>
+#include "gsd-kerberos-identity-inquiry.h"
+
+G_BEGIN_DECLS
+
+#define GSD_TYPE_KERBEROS_IDENTITY             (gsd_kerberos_identity_get_type ())
+#define GSD_KERBEROS_IDENTITY(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), GSD_TYPE_KERBEROS_IDENTITY, GsdKerberosIdentity))
+#define GSD_KERBEROS_IDENTITY_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), GSD_TYPE_KERBEROS_IDENTITY, GsdKerberosIdentityClass))
+#define GSD_IS_KERBEROS_IDENTITY(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GSD_TYPE_KERBEROS_IDENTITY))
+#define GSD_IS_KERBEROS_IDENTITY_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), GSD_TYPE_KERBEROS_IDENTITY))
+#define GSD_KERBEROS_IDENTITY_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), GSD_TYPE_KERBEROS_IDENTITY, GsdKerberosIdentityClass))
+
+typedef struct _GsdKerberosIdentity        GsdKerberosIdentity;
+typedef struct _GsdKerberosIdentityClass   GsdKerberosIdentityClass;
+typedef struct _GsdKerberosIdentityPrivate GsdKerberosIdentityPrivate;
+typedef enum _GsdKerberosIdentityDescriptionLevel GsdKerberosIdentityDescriptionLevel;
+
+enum _GsdKerberosIdentityDescriptionLevel
+{
+        GSD_KERBEROS_IDENTITY_DESCRIPTION_REALM,
+        GSD_KERBEROS_IDENTITY_DESCRIPTION_USERNAME_AND_REALM,
+        GSD_KERBEROS_IDENTITY_DESCRIPTION_USERNAME_ROLE_AND_REALM
+};
+
+struct _GsdKerberosIdentity
+{
+        GObject            parent;
+
+        GsdKerberosIdentityPrivate *priv;
+};
+
+struct _GsdKerberosIdentityClass
+{
+        GObjectClass parent_class;
+};
+
+GType         gsd_kerberos_identity_get_type (void);
+
+GsdIdentity  *gsd_kerberos_identity_new      (krb5_context  kerberos_context,
+                                              krb5_ccache   cache);
+
+gboolean      gsd_kerberos_identity_sign_in  (GsdKerberosIdentity              *self,
+                                              const char                       *principal_name,
+                                              GsdIdentityInquiryFunc            inquiry_func,
+                                              gpointer                          inquiry_data,
+                                              GDestroyNotify                    destroy_notify,
+                                              GCancellable                     *cancellable,
+                                              GError                          **error);
+void          gsd_kerberos_identity_update (GsdKerberosIdentity *identity,
+                                            GsdKerberosIdentity *new_identity);
+gboolean      gsd_kerberos_identity_renew  (GsdKerberosIdentity *self,
+                                            GError             **error);
+gboolean      gsd_kerberos_identity_erase  (GsdKerberosIdentity *self,
+                                            GError             **error);
+
+char         *gsd_kerberos_identity_get_principal_name (GsdKerberosIdentity *self);
+char         *gsd_kerberos_identity_get_realm_name     (GsdKerberosIdentity *self);
+G_END_DECLS
+
+#endif /* __GSD_KERBEROS_IDENTITY_H__ */
diff --git a/plugins/identity/identity.gnome-settings-plugin.in b/plugins/identity/identity.gnome-settings-plugin.in
new file mode 100644
index 00000000..1511abdd
--- /dev/null
+++ b/plugins/identity/identity.gnome-settings-plugin.in
@@ -0,0 +1,8 @@
+[GNOME Settings Plugin]
+Module=identity
+IAge=0
+_Name=Identity
+_Description=Identity plugin
+Authors=Ray Strode
+Copyright=Copyright © 2012 Red Hat, Inc.
+Website=
diff --git a/plugins/identity/org.gnome.Identity.xml b/plugins/identity/org.gnome.Identity.xml
new file mode 100644
index 00000000..0bf63947
--- /dev/null
+++ b/plugins/identity/org.gnome.Identity.xml
@@ -0,0 +1,73 @@
+<!DOCTYPE node PUBLIC
+"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
+"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+
+<!--
+ Copyright (C) 2012 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: Ray Strode <rstrode@redhat.com>
+-->
+
+<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
+  <!--
+      org.gnome.Identity.Manager:
+
+      An interface used for managing identities.
+  -->
+  <interface name="org.gnome.Identity.Manager">
+
+    <!--
+        SignIn:
+        @identity: The identifier of the identity (i.e., a kerberos principal name)
+        @details: Extra key/value pairs to set.
+        @identity_object_path: The object path of the signed in identity.
+
+        Signs in an identity.
+    -->
+    <method name="SignIn">
+      <arg name="identity" type="s" direction="in"/>
+      <arg name="details" type="a{ss}" direction="in"/>
+      <arg name="identity_object_path" type="o" direction="out"/>
+    </method>
+
+    <method name="SignOut">
+      <arg name="identity" type="s" direction="in"/>
+    </method>
+  </interface>
+
+  <!--
+      org.gnome.Identity:
+
+      The identity interface.
+  -->
+  <interface name="org.gnome.Identity">
+    <!--
+        Identifier:
+        Unique string identifying identity (i.e., a kerberos principal name)
+    -->
+    <property name="Identifier" type="s" access="read"/>
+
+    <!--
+        ExpirationTimestamp:
+        The time the identity's credentials will expire
+    -->
+    <property name="ExpirationTimestamp" type="x" access="read"/>
+
+  </interface>
+
+</node>
diff --git a/plugins/identity/test-identity.c b/plugins/identity/test-identity.c
new file mode 100644
index 00000000..43fc3098
--- /dev/null
+++ b/plugins/identity/test-identity.c
@@ -0,0 +1,7 @@
+#define NEW gsd_identity_test_new
+#define START gsd_identity_test_start
+#define STOP  gsd_identity_test_stop
+#define MANAGER GsdIdentityTest
+#include "gsd-identity-test.h"
+
+#include "test-plugin.h"