moving from https://github.com/perberos/mate-desktop-environment

10 files changed, 3089 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..58f9507
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,51 @@
+
+FULL_LIBEXECDIR=$(libexecdir)
+
+desktopdir = $(sysconfdir)/xdg/autostart
+desktop_DATA = polkit-mate-authentication-agent-1.desktop
+
+@INTLTOOL_DESKTOP_RULE@
+
+polkit-mate-authentication-agent-1.desktop.in : polkit-mate-authentication-agent-1.desktop.in.in
+	cat polkit-mate-authentication-agent-1.desktop.in.in | sed 's,@FULL_LIBEXECDIR@,$(FULL_LIBEXECDIR),' > $@
+
+libexec_PROGRAMS = polkit-mate-authentication-agent-1
+
+polkit_mate_authentication_agent_1_SOURCES = 						\
+	polkitmatelistener.h			polkitmatelistener.c			\
+	polkitmateauthenticator.h		polkitmateauthenticator.c		\
+	polkitmateauthenticationdialog.h	polkitmateauthenticationdialog.c	\
+	main.c										\
+	$(BUILT_SOURCES)
+
+polkit_mate_authentication_agent_1_CPPFLAGS = 		\
+	-I$(top_srcdir)					\
+	-DG_LOG_DOMAIN=\"polkit-mate-1\"		\
+	-DDATADIR=\""$(pkgdatadir)"\"			\
+	-DMATELOCALEDIR=\""$(datadir)/locale"\"	\
+	-DPOLKIT_AGENT_I_KNOW_API_IS_SUBJECT_TO_CHANGE	\
+	$(DISABLE_DEPRECATED)				\
+	$(AM_CPPFLAGS)
+
+polkit_mate_authentication_agent_1_CFLAGS = 		\
+	$(GTK_CFLAGS)					\
+	$(MATECONF_CFLAGS)					\
+	$(POLKIT_AGENT_CFLAGS)				\
+	$(POLKIT_GOBJECT_CFLAGS)			\
+	$(WARN_CFLAGS)					\
+	$(AM_CFLAGS)
+
+polkit_mate_authentication_agent_1_LDFLAGS = 		\
+	$(AM_LDFLAGS)
+
+polkit_mate_authentication_agent_1_LDADD = 		\
+	$(GTK_LIBS)					\
+	$(MATECONF_LIBS)					\
+	$(POLKIT_AGENT_LIBS)				\
+	$(POLKIT_GOBJECT_LIBS)				\
+	$(INTLLIBS)
+
+EXTRA_DIST = polkit-mate-authentication-agent-1.desktop.in.in
+
+clean-local :
+	rm -f *~ polkit-mate-authentication-agent-1.desktop polkit-mate-authentication-agent-1.desktop.in
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..fa9c25c
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,748 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009  Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+
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+libexec_PROGRAMS = polkit-mate-authentication-agent-1$(EXEEXT)
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+	polkit_mate_authentication_agent_1-polkitmateauthenticator.$(OBJEXT) \
+	polkit_mate_authentication_agent_1-polkitmateauthenticationdialog.$(OBJEXT) \
+	polkit_mate_authentication_agent_1-main.$(OBJEXT)
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+	$(am_polkit_mate_authentication_agent_1_OBJECTS)
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+desktop_DATA = polkit-mate-authentication-agent-1.desktop
+polkit_mate_authentication_agent_1_SOURCES = \
+	polkitmatelistener.h			polkitmatelistener.c			\
+	polkitmateauthenticator.h		polkitmateauthenticator.c		\
+	polkitmateauthenticationdialog.h	polkitmateauthenticationdialog.c	\
+	main.c										\
+	$(BUILT_SOURCES)
+
+polkit_mate_authentication_agent_1_CPPFLAGS = \
+	-I$(top_srcdir)					\
+	-DG_LOG_DOMAIN=\"polkit-mate-1\"		\
+	-DDATADIR=\""$(pkgdatadir)"\"			\
+	-DMATELOCALEDIR=\""$(datadir)/locale"\"	\
+	-DPOLKIT_AGENT_I_KNOW_API_IS_SUBJECT_TO_CHANGE	\
+	$(DISABLE_DEPRECATED)				\
+	$(AM_CPPFLAGS)
+
+polkit_mate_authentication_agent_1_CFLAGS = \
+	$(GTK_CFLAGS)					\
+	$(MATECONF_CFLAGS)					\
+	$(POLKIT_AGENT_CFLAGS)				\
+	$(POLKIT_GOBJECT_CFLAGS)			\
+	$(WARN_CFLAGS)					\
+	$(AM_CFLAGS)
+
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+	$(AM_LDFLAGS)
+
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+	$(GTK_LIBS)					\
+	$(MATECONF_LIBS)					\
+	$(POLKIT_AGENT_LIBS)				\
+	$(POLKIT_GOBJECT_LIBS)				\
+	$(INTLLIBS)
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+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+polkit-mate-authentication-agent-1$(EXEEXT): $(polkit_mate_authentication_agent_1_OBJECTS) $(polkit_mate_authentication_agent_1_DEPENDENCIES) 
+	@rm -f polkit-mate-authentication-agent-1$(EXEEXT)
+	$(AM_V_CCLD)$(polkit_mate_authentication_agent_1_LINK) $(polkit_mate_authentication_agent_1_OBJECTS) $(polkit_mate_authentication_agent_1_LDADD) $(LIBS)
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+	-rm -f *.$(OBJEXT)
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+distclean-compile:
+	-rm -f *.tab.c
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+	distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-desktopDATA install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-libexecPROGRAMS \
+	install-man install-pdf install-pdf-am install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags uninstall \
+	uninstall-am uninstall-desktopDATA uninstall-libexecPROGRAMS
+
+
+@INTLTOOL_DESKTOP_RULE@
+
+polkit-mate-authentication-agent-1.desktop.in : polkit-mate-authentication-agent-1.desktop.in.in
+	cat polkit-mate-authentication-agent-1.desktop.in.in | sed 's,@FULL_LIBEXECDIR@,$(FULL_LIBEXECDIR),' > $@
+
+clean-local :
+	rm -f *~ polkit-mate-authentication-agent-1.desktop polkit-mate-authentication-agent-1.desktop.in
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..a18dc13
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,278 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+#include <gtk/gtk.h>
+#include <glib/gi18n.h>
+#include <polkitagent/polkitagent.h>
+
+#include "polkitmatelistener.h"
+
+/* the Authority */
+static PolkitAuthority *authority = NULL;
+
+/* the session we are servicing */
+static PolkitSubject *session = NULL;
+
+/* the current set of temporary authorizations */
+static GList *current_temporary_authorizations = NULL;
+
+static GtkStatusIcon *status_icon = NULL;
+
+static void
+revoke_tmp_authz_cb (GObject      *source_object,
+                     GAsyncResult *res,
+                     gpointer      user_data)
+{
+  GError *error;
+
+  error = NULL;
+  polkit_authority_revoke_temporary_authorizations_finish (POLKIT_AUTHORITY (source_object),
+                                                           res,
+                                                           &error);
+  if (error != NULL)
+    {
+      g_warning ("Error revoking temporary authorizations: %s", error->message);
+      g_error_free (error);
+    }
+}
+
+static void
+revoke_tmp_authz (void)
+{
+  polkit_authority_revoke_temporary_authorizations (authority,
+                                                    session,
+                                                    NULL,
+                                                    revoke_tmp_authz_cb,
+                                                    NULL);
+}
+
+static void
+on_status_icon_activate (GtkStatusIcon *status_icon,
+                         gpointer       user_data)
+{
+  revoke_tmp_authz ();
+}
+
+static void
+on_status_icon_popup_menu (GtkStatusIcon *status_icon,
+                           guint          button,
+                           guint          activate_time,
+                           gpointer       user_data)
+{
+  revoke_tmp_authz ();
+}
+
+static void
+update_temporary_authorization_icon_real (void)
+{
+
+#if 0
+  GList *l;
+  g_debug ("have %d tmp authorizations", g_list_length (current_temporary_authorizations));
+  for (l = current_temporary_authorizations; l != NULL; l = l->next)
+    {
+      PolkitTemporaryAuthorization *authz = POLKIT_TEMPORARY_AUTHORIZATION (l->data);
+
+      g_debug ("have tmp authz for action %s (subject %s) with id %s (obtained %d, expires %d)",
+               polkit_temporary_authorization_get_action_id (authz),
+               polkit_subject_to_string (polkit_temporary_authorization_get_subject (authz)),
+               polkit_temporary_authorization_get_id (authz),
+               (gint) polkit_temporary_authorization_get_time_obtained (authz),
+               (gint) polkit_temporary_authorization_get_time_expires (authz));
+    }
+#endif
+
+  /* TODO:
+   *
+   * - we could do something fancy like displaying a window with the tmp authz
+   *   when the icon is clicked...
+   *
+   * - we could do some work using polkit_subject_exists() to ignore tmp authz
+   *   for subjects that no longer exists.. this is because temporary authorizations
+   *   are only valid for the subject that trigger the authentication dialog.
+   *
+   *   Maybe the authority could do this, would probably involve some polling, but
+   *   it seems cleaner to do this server side.
+   */
+
+  if (current_temporary_authorizations != NULL)
+    {
+      /* show icon */
+      if (status_icon == NULL)
+        {
+          status_icon = gtk_status_icon_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION);
+          gtk_status_icon_set_tooltip_text (status_icon,
+                                            _("Click the icon to drop all elevated privileges"));
+          g_signal_connect (status_icon,
+                            "activate",
+                            G_CALLBACK (on_status_icon_activate),
+                            NULL);
+          g_signal_connect (status_icon,
+                            "popup-menu",
+                            G_CALLBACK (on_status_icon_popup_menu),
+                            NULL);
+        }
+    }
+  else
+    {
+      /* hide icon */
+      if (status_icon != NULL)
+        {
+          gtk_status_icon_set_visible (status_icon, FALSE);
+          g_object_unref (status_icon);
+          status_icon = NULL;
+        }
+    }
+}
+
+static void
+enumerate_temporary_authorizations_cb (GObject      *source_object,
+                                       GAsyncResult *res,
+                                       gpointer      user_data)
+{
+  PolkitAuthority *authority = POLKIT_AUTHORITY (source_object);
+  GList *temporary_authorizations;
+  GError *error;
+
+  temporary_authorizations = NULL;
+
+  error = NULL;
+  temporary_authorizations = polkit_authority_enumerate_temporary_authorizations_finish (authority,
+                                                                                         res,
+                                                                                         &error);
+  if (error != NULL)
+    {
+      g_warning ("Error enumerating temporary authorizations: %s", error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  g_list_foreach (current_temporary_authorizations, (GFunc) g_object_unref, NULL);
+  g_list_free (current_temporary_authorizations);
+
+  current_temporary_authorizations = temporary_authorizations;
+
+  update_temporary_authorization_icon_real ();
+
+ out:
+  ;
+}
+
+static void
+update_temporary_authorization_icon (PolkitAuthority *authority)
+{
+  polkit_authority_enumerate_temporary_authorizations (authority,
+                                                       session,
+                                                       NULL,
+                                                       enumerate_temporary_authorizations_cb,
+                                                       NULL);
+}
+
+static void
+on_authority_changed (PolkitAuthority *authority,
+                      gpointer         user_data)
+{
+  update_temporary_authorization_icon (authority);
+}
+
+int
+main (int argc, char **argv)
+{
+  gint ret;
+  GMainLoop *loop;
+  PolkitAgentListener *listener;
+  GError *error;
+
+  g_type_init ();
+  gtk_init (&argc, &argv);
+
+  loop = NULL;
+  authority = NULL;
+  listener = NULL;
+  session = NULL;
+  ret = 1;
+
+  bindtextdomain (GETTEXT_PACKAGE, MATELOCALEDIR);
+#if HAVE_BIND_TEXTDOMAIN_CODESET
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+#endif
+  textdomain (GETTEXT_PACKAGE);
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+  error = NULL;
+  authority = polkit_authority_get_sync (NULL /* GCancellable* */, &error);
+  if (authority == NULL)
+    {
+      g_warning ("Error getting authority: %s", error->message);
+      g_error_free (error);
+      goto out;
+    }
+  g_signal_connect (authority,
+                    "changed",
+                    G_CALLBACK (on_authority_changed),
+                    NULL);
+
+  listener = polkit_mate_listener_new ();
+
+  error = NULL;
+  session = polkit_unix_session_new_for_process_sync (getpid (), NULL, &error);
+  if (error != NULL)
+    {
+      g_warning ("Unable to determine the session we are in: %s", error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  error = NULL;
+  if (!polkit_agent_register_listener (listener,
+                                       session,
+                                       "/org/mate/PolicyKit1/AuthenticationAgent",
+                                       &error))
+    {
+      g_printerr ("Cannot register authentication agent: %s\n", error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  update_temporary_authorization_icon (authority);
+
+  g_main_loop_run (loop);
+
+  ret = 0;
+
+ out:
+  if (authority != NULL)
+    g_object_unref (authority);
+  if (session != NULL)
+    g_object_unref (session);
+  if (listener != NULL)
+    g_object_unref (listener);
+  if (loop != NULL)
+    g_main_loop_unref (loop);
+
+  return ret;
+}
diff --git a/src/polkit-mate-authentication-agent-1.desktop.in.in b/src/polkit-mate-authentication-agent-1.desktop.in.in
new file mode 100644
index 0000000..7cc1003
--- /dev/null
+++ b/src/polkit-mate-authentication-agent-1.desktop.in.in
@@ -0,0 +1,9 @@
+[Desktop Entry]
+_Name=PolicyKit Authentication Agent
+_Comment=PolicyKit Authentication Agent
+Exec=@FULL_LIBEXECDIR@/polkit-mate-authentication-agent-1
+Terminal=false
+Type=Application
+Categories=
+NoDisplay=true
+OnlyShowIn=MATE;
diff --git a/src/polkitmateauthenticationdialog.c b/src/polkitmateauthenticationdialog.c
new file mode 100644
index 0000000..0d39890
--- /dev/null
+++ b/src/polkitmateauthenticationdialog.c
@@ -0,0 +1,1061 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <pwd.h>
+#include <errno.h>
+
+#include <glib/gi18n-lib.h>
+#include <gtk/gtk.h>
+
+#include "polkitmateauthenticationdialog.h"
+
+#define RESPONSE_USER_SELECTED 1001
+
+struct _PolkitMateAuthenticationDialogPrivate
+{
+  GtkWidget *user_combobox;
+  GtkWidget *prompt_label;
+  GtkWidget *password_entry;
+  GtkWidget *auth_button;
+  GtkWidget *cancel_button;
+  GtkWidget *info_label;
+  GtkWidget *table_alignment;
+
+  gchar *message;
+  gchar *action_id;
+  gchar *vendor;
+  gchar *vendor_url;
+  gchar *icon_name;
+  PolkitDetails *details;
+
+  gchar **users;
+  gchar *selected_user;
+
+  gboolean is_running;
+
+  GtkListStore *store;
+};
+
+G_DEFINE_TYPE (PolkitMateAuthenticationDialog, polkit_mate_authentication_dialog, GTK_TYPE_DIALOG);
+
+enum {
+  PROP_0,
+  PROP_ACTION_ID,
+  PROP_VENDOR,
+  PROP_VENDOR_URL,
+  PROP_ICON_NAME,
+  PROP_MESSAGE,
+  PROP_DETAILS,
+  PROP_USERS,
+  PROP_SELECTED_USER,
+};
+
+enum {
+  PIXBUF_COL,
+  TEXT_COL,
+  USERNAME_COL,
+  N_COL
+};
+
+static void
+user_combobox_set_sensitive (GtkCellLayout   *cell_layout,
+                             GtkCellRenderer *cell,
+                             GtkTreeModel    *tree_model,
+                             GtkTreeIter     *iter,
+                             gpointer         user_data)
+{
+  GtkTreePath *path;
+  gint *indices;
+  gboolean sensitive;
+
+  path = gtk_tree_model_get_path (tree_model, iter);
+  indices = gtk_tree_path_get_indices (path);
+  if (indices[0] == 0)
+    sensitive = FALSE;
+  else
+    sensitive = TRUE;
+  gtk_tree_path_free (path);
+
+  g_object_set (cell, "sensitive", sensitive, NULL);
+}
+
+static void
+user_combobox_changed (GtkComboBox *widget,
+                       gpointer     user_data)
+{
+  PolkitMateAuthenticationDialog *dialog = POLKIT_MATE_AUTHENTICATION_DIALOG (user_data);
+  GtkTreeIter iter;
+  gchar *user_name;
+
+  if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (widget), &iter))
+    {
+      gtk_tree_model_get (GTK_TREE_MODEL (dialog->priv->store), &iter, USERNAME_COL, &user_name, -1);
+
+      g_free (dialog->priv->selected_user);
+      dialog->priv->selected_user = user_name;
+
+      g_object_notify (G_OBJECT (dialog), "selected-user");
+
+      gtk_dialog_response (GTK_DIALOG (dialog), RESPONSE_USER_SELECTED);
+
+      /* make the password entry and Authenticate button sensitive again */
+      gtk_widget_set_sensitive (dialog->priv->prompt_label, TRUE);
+      gtk_widget_set_sensitive (dialog->priv->password_entry, TRUE);
+      gtk_widget_set_sensitive (dialog->priv->auth_button, TRUE);
+    }
+}
+
+static void
+create_user_combobox (PolkitMateAuthenticationDialog *dialog)
+{
+  int n;
+  GtkComboBox *combo;
+  GtkTreeIter iter;
+  GtkCellRenderer *renderer;
+
+  /* if we've already built the list of admin users once, then avoid
+   * doing it again.. (this is mainly used when the user entered the
+   * wrong password and the dialog is recycled)
+   */
+  if (dialog->priv->store != NULL)
+    return;
+
+  combo = GTK_COMBO_BOX (dialog->priv->user_combobox);
+  dialog->priv->store = gtk_list_store_new (3, GDK_TYPE_PIXBUF, G_TYPE_STRING, G_TYPE_STRING);
+
+  gtk_list_store_append (dialog->priv->store, &iter);
+  gtk_list_store_set (dialog->priv->store, &iter,
+                      PIXBUF_COL, NULL,
+                      TEXT_COL, _("Select user..."),
+                      USERNAME_COL, NULL,
+                      -1);
+
+
+  /* For each user */
+  for (n = 0; dialog->priv->users[n] != NULL; n++)
+    {
+      gchar *gecos;
+      gchar *real_name;
+      GdkPixbuf *pixbuf;
+      struct passwd *passwd;
+
+      /* we're single threaded so this is fine */
+      errno = 0;
+      passwd = getpwnam (dialog->priv->users[n]);
+      if (passwd == NULL)
+        {
+          g_warning ("Error doing getpwnam(\"%s\"): %s", dialog->priv->users[n], strerror (errno));
+          continue;
+        }
+
+      if (passwd->pw_gecos != NULL)
+        gecos = g_locale_to_utf8 (passwd->pw_gecos, -1, NULL, NULL, NULL);
+      else
+        gecos = NULL;
+
+      if (gecos != NULL && strlen (gecos) > 0)
+        {
+          gchar *first_comma;
+          first_comma = strchr (gecos, ',');
+          if (first_comma != NULL)
+            *first_comma = '\0';
+        }
+      if (gecos != NULL && strlen (gecos) > 0 && strcmp (gecos, dialog->priv->users[n]) != 0)
+        real_name = g_strdup_printf (_("%s (%s)"), gecos, dialog->priv->users[n]);
+       else
+         real_name = g_strdup (dialog->priv->users[n]);
+      g_free (gecos);
+
+      /* Load users face */
+      pixbuf = NULL;
+      if (passwd->pw_dir != NULL)
+        {
+          gchar *path;
+          path = g_strdup_printf ("%s/.face", passwd->pw_dir);
+          /* TODO: we probably shouldn't hard-code the size to 16x16 */
+          pixbuf = gdk_pixbuf_new_from_file_at_scale (path, 16, 16, TRUE, NULL);
+          g_free (path);
+        }
+
+      /* fall back to stock_person icon */
+      if (pixbuf == NULL)
+        {
+          pixbuf = gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
+                                             "stock_person",
+                                             GTK_ICON_SIZE_MENU,
+                                             0,
+                                             NULL);
+        }
+
+      gtk_list_store_append (dialog->priv->store, &iter);
+      gtk_list_store_set (dialog->priv->store, &iter,
+                          PIXBUF_COL, pixbuf,
+                          TEXT_COL, real_name,
+                          USERNAME_COL, dialog->priv->users[n],
+                          -1);
+
+      g_free (real_name);
+      g_object_unref (pixbuf);
+    }
+
+  gtk_combo_box_set_model (combo, GTK_TREE_MODEL (dialog->priv->store));
+
+  renderer = gtk_cell_renderer_pixbuf_new ();
+  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, FALSE);
+  gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo),
+                                  renderer,
+                                  "pixbuf", PIXBUF_COL,
+                                  NULL);
+  gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
+                                      renderer,
+                                      user_combobox_set_sensitive,
+                                      NULL, NULL);
+
+  renderer = gtk_cell_renderer_text_new ();
+  gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
+  gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo),
+                                  renderer,
+                                  "text", TEXT_COL,
+                                  NULL);
+  gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (combo),
+                                      renderer,
+                                      user_combobox_set_sensitive,
+                                      NULL, NULL);
+
+  /* Initially select the "Select user..." ... */
+  gtk_combo_box_set_active (GTK_COMBO_BOX (combo), 0);
+
+  /* Listen when a new user is selected */
+  g_signal_connect (GTK_WIDGET (combo),
+                    "changed",
+                    G_CALLBACK (user_combobox_changed),
+                    dialog);
+}
+
+static GtkWidget *
+get_image (PolkitMateAuthenticationDialog *dialog)
+{
+  GdkPixbuf *pixbuf;
+  GdkPixbuf *copy_pixbuf;
+  GdkPixbuf *vendor_pixbuf;
+  GtkWidget *image;
+
+  pixbuf = NULL;
+  copy_pixbuf = NULL;
+  vendor_pixbuf = NULL;
+
+  if (dialog->priv->icon_name == NULL || strlen (dialog->priv->icon_name) == 0)
+    {
+      image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION, GTK_ICON_SIZE_DIALOG);
+      goto out;
+    }
+
+  vendor_pixbuf = gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
+                                            dialog->priv->icon_name,
+                                            48,
+                                            0,
+                                            NULL);
+  if (vendor_pixbuf == NULL)
+    {
+      g_warning ("No icon for themed icon with name '%s'", dialog->priv->icon_name);
+      image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_AUTHENTICATION, GTK_ICON_SIZE_DIALOG);
+      goto out;
+    }
+
+
+  pixbuf = gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
+                                     GTK_STOCK_DIALOG_AUTHENTICATION,
+                                     48,
+                                     0,
+                                     NULL);
+  if (pixbuf == NULL)
+    goto out;
+
+  /* need to copy the pixbuf since we're modifying it */
+  copy_pixbuf = gdk_pixbuf_copy (pixbuf);
+  if (copy_pixbuf == NULL)
+    goto out;
+
+  /* blend the vendor icon in the bottom right quarter */
+  gdk_pixbuf_composite (vendor_pixbuf,
+                        copy_pixbuf,
+                        24, 24, 24, 24,
+                        24, 24, 0.5, 0.5,
+                        GDK_INTERP_BILINEAR,
+                        255);
+
+  image = gtk_image_new_from_pixbuf (copy_pixbuf);
+
+out:
+  if (pixbuf != NULL)
+    g_object_unref (pixbuf);
+
+  if (copy_pixbuf != NULL)
+    g_object_unref (copy_pixbuf);
+
+  if (vendor_pixbuf != NULL)
+    g_object_unref (vendor_pixbuf);
+
+  return image;
+}
+
+static void
+polkit_mate_authentication_dialog_set_property (GObject      *object,
+                                                 guint         prop_id,
+                                                 const GValue *value,
+                                                 GParamSpec   *pspec)
+{
+  PolkitMateAuthenticationDialog *dialog = POLKIT_MATE_AUTHENTICATION_DIALOG (object);
+
+  switch (prop_id)
+    {
+    case PROP_DETAILS:
+      dialog->priv->details = g_value_dup_object (value);
+      break;
+
+    case PROP_ACTION_ID:
+      dialog->priv->action_id = g_value_dup_string (value);
+      break;
+
+    case PROP_VENDOR:
+      dialog->priv->vendor = g_value_dup_string (value);
+      break;
+
+    case PROP_VENDOR_URL:
+      dialog->priv->vendor_url = g_value_dup_string (value);
+      break;
+
+    case PROP_ICON_NAME:
+      dialog->priv->icon_name = g_value_dup_string (value);
+      break;
+
+    case PROP_MESSAGE:
+      dialog->priv->message = g_value_dup_string (value);
+      break;
+
+    case PROP_USERS:
+      dialog->priv->users = g_value_dup_boxed (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+polkit_mate_authentication_dialog_get_property (GObject    *object,
+                                                 guint       prop_id,
+                                                 GValue     *value,
+                                                 GParamSpec *pspec)
+{
+  PolkitMateAuthenticationDialog *dialog = POLKIT_MATE_AUTHENTICATION_DIALOG (object);
+
+  switch (prop_id)
+    {
+    case PROP_MESSAGE:
+      g_value_set_string (value, dialog->priv->message);
+      break;
+
+    /* TODO: rest of the properties */
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static GtkWidget *
+add_row (GtkWidget *table, int row, const char *label_text, GtkWidget *entry)
+{
+  GtkWidget *label;
+
+  label = gtk_label_new_with_mnemonic (label_text);
+  gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
+  gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5);
+
+  gtk_table_attach (GTK_TABLE (table), label,
+                    0, 1, row, row + 1,
+                    GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+  gtk_table_attach_defaults (GTK_TABLE (table), entry,
+                                   1, 2, row, row + 1);
+  gtk_label_set_mnemonic_widget (GTK_LABEL (label), entry);
+
+  return label;
+}
+
+static void
+action_id_activated (GtkLabel *url_label, gpointer user_data)
+{
+#if 0
+  GError *error;
+  DBusGConnection *bus;
+  DBusGProxy *manager_proxy;
+
+  error = NULL;
+  bus = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
+  if (bus == NULL)
+    {
+      g_warning ("Couldn't connect to session bus: %s", error->message);
+      g_error_free (error);
+      goto out;
+    }
+
+  manager_proxy = dbus_g_proxy_new_for_name (bus,
+                                             "org.mate.PolicyKit.AuthorizationManager",
+                                             "/",
+                                             "org.mate.PolicyKit.AuthorizationManager.SingleInstance");
+  if (manager_proxy == NULL)
+    {
+      g_warning ("Could not construct manager_proxy object; bailing out");
+      goto out;
+    }
+
+  if (!dbus_g_proxy_call (manager_proxy,
+                          "ShowAction",
+                          &error,
+                          G_TYPE_STRING, gtk_label_get_current_uri (GTK_LABEL (url_label)),
+                          G_TYPE_INVALID,
+                          G_TYPE_INVALID))
+    {
+      if (error != NULL)
+        {
+          g_warning ("Failed to call into manager: %s", error->message);
+          g_error_free (error);
+        }
+      else
+        {
+          g_warning ("Failed to call into manager");
+        }
+      goto out;
+    }
+
+out:
+        ;
+#endif
+}
+
+static void
+polkit_mate_authentication_dialog_init (PolkitMateAuthenticationDialog *dialog)
+{
+  dialog->priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
+                                                   POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG,
+                                                   PolkitMateAuthenticationDialogPrivate);
+}
+
+static void
+polkit_mate_authentication_dialog_finalize (GObject *object)
+{
+  PolkitMateAuthenticationDialog *dialog;
+
+  dialog = POLKIT_MATE_AUTHENTICATION_DIALOG (object);
+
+  g_free (dialog->priv->message);
+  g_free (dialog->priv->action_id);
+  g_free (dialog->priv->vendor);
+  g_free (dialog->priv->vendor_url);
+  g_free (dialog->priv->icon_name);
+  if (dialog->priv->details != NULL)
+    g_object_unref (dialog->priv->details);
+
+  g_strfreev (dialog->priv->users);
+  g_free (dialog->priv->selected_user);
+
+  if (dialog->priv->store != NULL)
+    g_object_unref (dialog->priv->store);
+
+  if (G_OBJECT_CLASS (polkit_mate_authentication_dialog_parent_class)->finalize != NULL)
+    G_OBJECT_CLASS (polkit_mate_authentication_dialog_parent_class)->finalize (object);
+}
+
+static void
+polkit_mate_authentication_dialog_constructed (GObject *object)
+{
+  PolkitMateAuthenticationDialog *dialog;
+  GtkWidget *hbox;
+  GtkWidget *main_vbox;
+  GtkWidget *vbox;
+  GtkWidget *table_alignment;
+  GtkWidget *table;
+  GtkWidget *details_expander;
+  GtkWidget *details_vbox;
+  GtkWidget *label;
+  GtkWidget *image;
+  GtkWidget *content_area;
+  GtkWidget *action_area;
+  gboolean have_user_combobox;
+  gchar *s;
+  guint rows;
+
+  dialog = POLKIT_MATE_AUTHENTICATION_DIALOG (object);
+
+  if (G_OBJECT_CLASS (polkit_mate_authentication_dialog_parent_class)->constructed != NULL)
+    G_OBJECT_CLASS (polkit_mate_authentication_dialog_parent_class)->constructed (object);
+
+  have_user_combobox = FALSE;
+
+  dialog->priv->cancel_button = gtk_dialog_add_button (GTK_DIALOG (dialog),
+                                                            GTK_STOCK_CANCEL,
+                                                            GTK_RESPONSE_CANCEL);
+  dialog->priv->auth_button = gtk_dialog_add_button (GTK_DIALOG (dialog),
+                                                          _("_Authenticate"),
+                                                          GTK_RESPONSE_OK);
+  gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+
+  content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
+  action_area = gtk_dialog_get_action_area (GTK_DIALOG (dialog));
+
+  gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
+  gtk_container_set_border_width (GTK_CONTAINER (dialog), 5);
+  gtk_box_set_spacing (GTK_BOX (content_area), 2); /* 2 * 5 + 2 = 12 */
+  gtk_container_set_border_width (GTK_CONTAINER (action_area), 5);
+  gtk_box_set_spacing (GTK_BOX (action_area), 6);
+  gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
+  gtk_window_set_icon_name (GTK_WINDOW (dialog), GTK_STOCK_DIALOG_AUTHENTICATION);
+
+  hbox = gtk_hbox_new (FALSE, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);
+  gtk_box_pack_start (GTK_BOX (content_area), hbox, TRUE, TRUE, 0);
+
+  image = get_image (dialog);
+  gtk_misc_set_alignment (GTK_MISC (image), 0.5, 0.0);
+  gtk_box_pack_start (GTK_BOX (hbox), image, FALSE, FALSE, 0);
+
+  main_vbox = gtk_vbox_new (FALSE, 10);
+  gtk_box_pack_start (GTK_BOX (hbox), main_vbox, TRUE, TRUE, 0);
+
+  /* main message */
+  label = gtk_label_new (NULL);
+  s = g_strdup_printf ("<big><b>%s</b></big>", dialog->priv->message);
+  gtk_label_set_markup (GTK_LABEL (label), s);
+  g_free (s);
+  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
+  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
+  gtk_box_pack_start (GTK_BOX (main_vbox), label, FALSE, FALSE, 0);
+
+  /* secondary message */
+  label = gtk_label_new (NULL);
+  if (g_strv_length (dialog->priv->users) > 1)
+    {
+          gtk_label_set_markup (GTK_LABEL (label),
+                                _("An application is attempting to perform an action that requires privileges. "
+                                  "Authentication as one of the users below is required to perform this action."));
+    }
+  else
+    {
+      if (strcmp (g_get_user_name (), dialog->priv->users[0]) == 0)
+        {
+          gtk_label_set_markup (GTK_LABEL (label),
+                                _("An application is attempting to perform an action that requires privileges. "
+                                  "Authentication is required to perform this action."));
+        }
+      else
+        {
+          gtk_label_set_markup (GTK_LABEL (label),
+                                _("An application is attempting to perform an action that requires privileges. "
+                                  "Authentication as the super user is required to perform this action."));
+        }
+    }
+  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
+  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
+  gtk_box_pack_start (GTK_BOX (main_vbox), label, FALSE, FALSE, 0);
+
+  /* user combobox */
+  if (g_strv_length (dialog->priv->users) > 1)
+    {
+      dialog->priv->user_combobox = gtk_combo_box_new ();
+      gtk_box_pack_start (GTK_BOX (main_vbox), GTK_WIDGET (dialog->priv->user_combobox), FALSE, FALSE, 0);
+
+      create_user_combobox (dialog);
+
+      have_user_combobox = TRUE;
+    }
+  else
+    {
+      dialog->priv->selected_user = g_strdup (dialog->priv->users[0]);
+    }
+
+  /* password entry */
+  vbox = gtk_vbox_new (FALSE, 0);
+  gtk_box_pack_start (GTK_BOX (main_vbox), vbox, FALSE, FALSE, 0);
+
+  table_alignment = gtk_alignment_new (0.0, 0.0, 1.0, 1.0);
+  gtk_box_pack_start (GTK_BOX (vbox), table_alignment, FALSE, FALSE, 0);
+  table = gtk_table_new (1, 2, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 12);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (table_alignment), table);
+  dialog->priv->password_entry = gtk_entry_new ();
+  gtk_entry_set_visibility (GTK_ENTRY (dialog->priv->password_entry), FALSE);
+  dialog->priv->prompt_label = add_row (table, 0, _("_Password:"), dialog->priv->password_entry);
+
+  g_signal_connect_swapped (dialog->priv->password_entry, "activate",
+                            G_CALLBACK (gtk_window_activate_default),
+                            dialog);
+
+  dialog->priv->table_alignment = table_alignment;
+  /* initially never show the password entry stuff; we'll toggle it on/off so it's
+   * only shown when prompting for a password */
+  gtk_widget_set_no_show_all (dialog->priv->table_alignment, TRUE);
+
+  /* A label for showing PAM_TEXT_INFO and PAM_TEXT_ERROR messages */
+  label = gtk_label_new (NULL);
+  gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
+  gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
+  dialog->priv->info_label = label;
+
+  /* Details */
+  details_expander = gtk_expander_new_with_mnemonic (_("<small><b>_Details</b></small>"));
+  gtk_expander_set_use_markup (GTK_EXPANDER (details_expander), TRUE);
+  gtk_box_pack_start (GTK_BOX (content_area), details_expander, FALSE, FALSE, 0);
+
+  details_vbox = gtk_vbox_new (FALSE, 10);
+  gtk_container_add (GTK_CONTAINER (details_expander), details_vbox);
+
+  table_alignment = gtk_alignment_new (0.0, 0.0, 1.0, 1.0);
+  gtk_box_pack_start (GTK_BOX (details_vbox), table_alignment, FALSE, FALSE, 0);
+  table = gtk_table_new (1, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 12);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (table_alignment), table);
+
+  /* TODO: sort keys? */
+  rows = 0;
+  if (dialog->priv->details != NULL)
+    {
+      guint n;
+      gchar **keys;
+
+      keys = polkit_details_get_keys (dialog->priv->details);
+      for (n = 0; keys[n] != NULL; n++)
+        {
+          const gchar *key = keys[n];
+          const gchar *value;
+
+          value = polkit_details_lookup (dialog->priv->details, key);
+
+          label = gtk_label_new (NULL);
+          s = g_strdup_printf ("<small>%s</small>", value);
+          gtk_label_set_markup (GTK_LABEL (label), s);
+          g_free (s);
+          gtk_misc_set_alignment (GTK_MISC (label), 0, 1.0);
+          s = g_strdup_printf ("<small><b>%s:</b></small>", key);
+          add_row (table, rows, s, label);
+          g_free (s);
+
+          rows++;
+        }
+      g_strfreev (keys);
+    }
+
+  /* --- */
+
+  label = gtk_label_new (NULL);
+  gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
+  s = g_strdup_printf ("<small><a href=\"%s\">%s</a></small>",
+                       dialog->priv->action_id,
+                       dialog->priv->action_id);
+  gtk_label_set_markup (GTK_LABEL (label), s);
+  g_free (s);
+  gtk_misc_set_alignment (GTK_MISC (label), 0, 1.0);
+  add_row (table, rows++, _("<small><b>Action:</b></small>"), label);
+  g_signal_connect (label, "activate-link", G_CALLBACK (action_id_activated), NULL);
+
+  s = g_strdup_printf (_("Click to edit %s"), dialog->priv->action_id);
+  gtk_widget_set_tooltip_markup (label, s);
+  g_free (s);
+
+  /* --- */
+
+  label = gtk_label_new (NULL);
+  gtk_label_set_use_markup (GTK_LABEL (label), TRUE);
+  s = g_strdup_printf ("<small><a href=\"%s\">%s</a></small>",
+                       dialog->priv->vendor_url,
+                       dialog->priv->vendor);
+  gtk_label_set_markup (GTK_LABEL (label), s);
+  g_free (s);
+  gtk_misc_set_alignment (GTK_MISC (label), 0, 1.0);
+  add_row (table, rows++, _("<small><b>Vendor:</b></small>"), label);
+
+  s = g_strdup_printf (_("Click to open %s"), dialog->priv->vendor_url);
+  gtk_widget_set_tooltip_markup (label, s);
+  g_free (s);
+
+  if (have_user_combobox)
+    {
+      /* ... and make the password entry and "Authenticate" button insensitive */
+      gtk_widget_set_sensitive (dialog->priv->prompt_label, FALSE);
+      gtk_widget_set_sensitive (dialog->priv->password_entry, FALSE);
+      gtk_widget_set_sensitive (dialog->priv->auth_button, FALSE);
+    }
+  else
+    {
+    }
+
+  gtk_widget_realize (GTK_WIDGET (dialog));
+
+}
+
+static void
+polkit_mate_authentication_dialog_class_init (PolkitMateAuthenticationDialogClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (PolkitMateAuthenticationDialogPrivate));
+
+  gobject_class->finalize = polkit_mate_authentication_dialog_finalize;
+  gobject_class->get_property = polkit_mate_authentication_dialog_get_property;
+  gobject_class->set_property = polkit_mate_authentication_dialog_set_property;
+  gobject_class->constructed  = polkit_mate_authentication_dialog_constructed;
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_DETAILS,
+                                   g_param_spec_object ("details",
+                                                        NULL,
+                                                        NULL,
+                                                        POLKIT_TYPE_DETAILS,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_ACTION_ID,
+                                   g_param_spec_string ("action-id",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_VENDOR,
+                                   g_param_spec_string ("vendor",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_VENDOR_URL,
+                                   g_param_spec_string ("vendor-url",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_ICON_NAME,
+                                   g_param_spec_string ("icon-name",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_MESSAGE,
+                                   g_param_spec_string ("message",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_USERS,
+                                   g_param_spec_boxed ("users",
+                                                       NULL,
+                                                       NULL,
+                                                       G_TYPE_STRV,
+                                                       G_PARAM_READWRITE |
+                                                       G_PARAM_CONSTRUCT_ONLY |
+                                                       G_PARAM_STATIC_NAME |
+                                                       G_PARAM_STATIC_NICK |
+                                                       G_PARAM_STATIC_BLURB));
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_SELECTED_USER,
+                                   g_param_spec_string ("selected-user",
+                                                        NULL,
+                                                        NULL,
+                                                        NULL,
+                                                        G_PARAM_READABLE |
+                                                        G_PARAM_STATIC_NAME |
+                                                        G_PARAM_STATIC_NICK |
+                                                        G_PARAM_STATIC_BLURB));
+}
+
+/**
+ * polkit_mate_authentication_dialog_new:
+ *
+ * Yada yada yada...
+ *
+ * Returns: A new password dialog.
+ **/
+GtkWidget *
+polkit_mate_authentication_dialog_new (const gchar    *action_id,
+                                        const gchar    *vendor,
+                                        const gchar    *vendor_url,
+                                        const gchar    *icon_name,
+                                        const gchar    *message_markup,
+                                        PolkitDetails  *details,
+                                        gchar         **users)
+{
+  PolkitMateAuthenticationDialog *dialog;
+  GtkWindow *window;
+
+  dialog = g_object_new (POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG,
+                         "action-id", action_id,
+                         "vendor", vendor,
+                         "vendor-url", vendor_url,
+                         "icon-name", icon_name,
+                         "message", message_markup,
+                         "details", details,
+                         "users", users,
+                         NULL);
+
+  window = GTK_WINDOW (dialog);
+
+  gtk_window_set_position (window, GTK_WIN_POS_CENTER);
+  gtk_window_set_modal (window, TRUE);
+  gtk_window_set_resizable (window, FALSE);
+  gtk_window_set_keep_above (window, TRUE);
+  gtk_window_set_title (window, _("Authenticate"));
+  g_signal_connect (dialog, "close", G_CALLBACK (gtk_widget_hide), NULL);
+
+  return GTK_WIDGET (dialog);
+}
+
+/**
+ * polkit_mate_authentication_dialog_indicate_error:
+ * @dialog: the auth dialog
+ *
+ * Call this function to indicate an authentication error; typically shakes the window
+ **/
+void
+polkit_mate_authentication_dialog_indicate_error (PolkitMateAuthenticationDialog *dialog)
+{
+  int x, y;
+  int n;
+  int diff;
+
+  /* TODO: detect compositing manager and do fancy stuff here */
+
+  gtk_window_get_position (GTK_WINDOW (dialog), &x, &y);
+
+  for (n = 0; n < 10; n++)
+    {
+      if (n % 2 == 0)
+        diff = -15;
+      else
+        diff = 15;
+
+      gtk_window_move (GTK_WINDOW (dialog), x + diff, y);
+
+      while (gtk_events_pending ())
+        {
+          gtk_main_iteration ();
+        }
+
+      g_usleep (10000);
+    }
+
+  gtk_window_move (GTK_WINDOW (dialog), x, y);
+}
+
+/**
+ * polkit_mate_authentication_dialog_run_until_user_is_selected:
+ * @dialog: A #PolkitMateAuthenticationDialog.
+ *
+ * Runs @dialog in a recursive main loop until a user have been selected.
+ *
+ * If there is only one element in the the users array (which is set upon construction) or
+ * an user has already been selected, this function returns immediately with the return
+ * value %TRUE.
+ *
+ * Returns: %TRUE if a user is selected (use polkit_mate_dialog_get_selected_user() to obtain the user) or
+ *          %FALSE if the dialog was cancelled.
+ **/
+gboolean
+polkit_mate_authentication_dialog_run_until_user_is_selected (PolkitMateAuthenticationDialog *dialog)
+{
+  gboolean ret;
+  gint response;
+
+  ret = FALSE;
+
+  if (dialog->priv->selected_user != NULL)
+    {
+      ret = TRUE;
+      goto out;
+    }
+
+  dialog->priv->is_running = TRUE;
+
+  response = gtk_dialog_run (GTK_DIALOG (dialog));
+
+  dialog->priv->is_running = FALSE;
+
+  if (response == RESPONSE_USER_SELECTED)
+    ret = TRUE;
+
+ out:
+  return ret;
+}
+
+/**
+ * polkit_mate_authentication_dialog_run_until_response_for_prompt:
+ * @dialog: A #PolkitMateAuthenticationDialog.
+ * @prompt: The prompt to present the user with.
+ * @echo_chars: Whether characters should be echoed in the password entry box.
+ * @was_cancelled: Set to %TRUE if the dialog was cancelled.
+ * @new_user_selected: Set to %TRUE if another user was selected.
+ *
+ * Runs @dialog in a recursive main loop until a response to @prompt have been obtained from the user.
+ *
+ * Returns: The response (free with g_free()) or %NULL if one of @was_cancelled or @new_user_selected
+ *          has been set to %TRUE.
+ **/
+gchar *
+polkit_mate_authentication_dialog_run_until_response_for_prompt (PolkitMateAuthenticationDialog *dialog,
+                                                                  const gchar           *prompt,
+                                                                  gboolean               echo_chars,
+                                                                  gboolean              *was_cancelled,
+                                                                  gboolean              *new_user_selected)
+{
+  gint response;
+  gchar *ret;
+
+  gtk_label_set_text_with_mnemonic (GTK_LABEL (dialog->priv->prompt_label), prompt);
+  gtk_entry_set_visibility (GTK_ENTRY (dialog->priv->password_entry), echo_chars);
+  gtk_entry_set_text (GTK_ENTRY (dialog->priv->password_entry), "");
+  gtk_widget_grab_focus (dialog->priv->password_entry);
+
+  ret = NULL;
+
+  if (was_cancelled != NULL)
+    *was_cancelled = FALSE;
+
+  if (new_user_selected != NULL)
+    *new_user_selected = FALSE;
+
+  dialog->priv->is_running = TRUE;
+
+  gtk_widget_set_no_show_all (dialog->priv->table_alignment, FALSE);
+  gtk_widget_show_all (dialog->priv->table_alignment);
+
+  response = gtk_dialog_run (GTK_DIALOG (dialog));
+
+  gtk_widget_hide_all (dialog->priv->table_alignment);
+  gtk_widget_set_no_show_all (dialog->priv->table_alignment, TRUE);
+
+  dialog->priv->is_running = FALSE;
+
+  if (response == GTK_RESPONSE_OK)
+    {
+      ret = g_strdup (gtk_entry_get_text (GTK_ENTRY (dialog->priv->password_entry)));
+    }
+  else if (response == RESPONSE_USER_SELECTED)
+    {
+      if (new_user_selected != NULL)
+        *new_user_selected = TRUE;
+    }
+  else
+    {
+      if (was_cancelled != NULL)
+        *was_cancelled = TRUE;
+    }
+
+  return ret;
+}
+
+/**
+ * polkit_mate_authentication_dialog_get_selected_user:
+ * @dialog: A #PolkitMateAuthenticationDialog.
+ *
+ * Gets the currently selected user.
+ *
+ * Returns: The currently selected user (free with g_free()) or %NULL if no user is currently selected.
+ **/
+gchar *
+polkit_mate_authentication_dialog_get_selected_user (PolkitMateAuthenticationDialog *dialog)
+{
+  return g_strdup (dialog->priv->selected_user);
+}
+
+void
+polkit_mate_authentication_dialog_set_info_message (PolkitMateAuthenticationDialog *dialog,
+                                                     const gchar                     *info_markup)
+{
+  gtk_label_set_markup (GTK_LABEL (dialog->priv->info_label), info_markup);
+}
+
+
+/**
+ * polkit_mate_authentication_dialog_cancel:
+ * @dialog: A #PolkitMateAuthenticationDialog.
+ *
+ * Cancels the dialog if it is currenlty running.
+ *
+ * Returns: %TRUE if the dialog was running.
+ **/
+gboolean
+polkit_mate_authentication_dialog_cancel (PolkitMateAuthenticationDialog *dialog)
+{
+  if (!dialog->priv->is_running)
+    return FALSE;
+
+  gtk_dialog_response (GTK_DIALOG (dialog), GTK_RESPONSE_CANCEL);
+
+  return TRUE;
+}
diff --git a/src/polkitmateauthenticationdialog.h b/src/polkitmateauthenticationdialog.h
new file mode 100644
index 0000000..debcf1b
--- /dev/null
+++ b/src/polkitmateauthenticationdialog.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+#ifndef __POLKIT_MATE_AUTHENTICATION_DIALOG_H
+#define __POLKIT_MATE_AUTHENTICATION_DIALOG_H
+
+#include <gtk/gtk.h>
+#include <polkit/polkit.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG            (polkit_mate_authentication_dialog_get_type ())
+#define POLKIT_MATE_AUTHENTICATION_DIALOG(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG, PolkitMateAuthenticationDialog))
+#define POLKIT_MATE_AUTHENTICATION_DIALOG_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG, PolkitMateAuthenticationDialogClass))
+#define POLKIT_MATE_IS_AUTHENTICATION_DIALOG(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG))
+#define POLKIT_MATE_IS_AUTHENTICATION_DIALOG_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), POLKIT_MATE_TYPE_AUTHENTICATION_DIALOG))
+
+typedef struct _PolkitMateAuthenticationDialog        PolkitMateAuthenticationDialog;
+typedef struct _PolkitMateAuthenticationDialogClass   PolkitMateAuthenticationDialogClass;
+typedef struct _PolkitMateAuthenticationDialogPrivate PolkitMateAuthenticationDialogPrivate;
+
+struct _PolkitMateAuthenticationDialog
+{
+  GtkDialog parent_instance;
+  PolkitMateAuthenticationDialogPrivate *priv;
+};
+
+struct _PolkitMateAuthenticationDialogClass
+{
+  GtkDialogClass parent_class;
+};
+
+GType      polkit_mate_authentication_dialog_get_type                      (void);
+GtkWidget *polkit_mate_authentication_dialog_new                           (const gchar    *action_id,
+                                                                             const gchar    *vendor,
+                                                                             const gchar    *vendor_url,
+                                                                             const gchar    *icon_name,
+                                                                             const gchar    *message_markup,
+                                                                             PolkitDetails  *details,
+                                                                             gchar         **users);
+gchar     *polkit_mate_authentication_dialog_get_selected_user             (PolkitMateAuthenticationDialog *dialog);
+gboolean   polkit_mate_authentication_dialog_run_until_user_is_selected    (PolkitMateAuthenticationDialog *dialog);
+gchar     *polkit_mate_authentication_dialog_run_until_response_for_prompt (PolkitMateAuthenticationDialog *dialog,
+                                                                             const gchar                     *prompt,
+                                                                             gboolean                         echo_chars,
+                                                                             gboolean                        *was_cancelled,
+                                                                             gboolean                        *new_user_selected);
+gboolean   polkit_mate_authentication_dialog_cancel                        (PolkitMateAuthenticationDialog *dialog);
+void       polkit_mate_authentication_dialog_indicate_error                (PolkitMateAuthenticationDialog *dialog);
+void       polkit_mate_authentication_dialog_set_info_message              (PolkitMateAuthenticationDialog *dialog,
+                                                                             const gchar                     *info_markup);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __POLKIT_MATE_AUTHENTICATION_DIALOG_H */
diff --git a/src/polkitmateauthenticator.c b/src/polkitmateauthenticator.c
new file mode 100644
index 0000000..11d28d2
--- /dev/null
+++ b/src/polkitmateauthenticator.c
@@ -0,0 +1,508 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+
+#include "config.h"
+
+#include <string.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <glib/gi18n.h>
+
+#include <polkit/polkit.h>
+#include <polkitagent/polkitagent.h>
+
+#include "polkitmateauthenticator.h"
+#include "polkitmateauthenticationdialog.h"
+
+struct _PolkitMateAuthenticator
+{
+  GObject parent_instance;
+
+  PolkitAuthority *authority;
+  gchar *action_id;
+  gchar *message;
+  gchar *icon_name;
+  PolkitDetails *details;
+  gchar *cookie;
+  GList *identities;
+
+  PolkitActionDescription *action_desc;
+  gchar **users;
+
+  gboolean gained_authorization;
+  gboolean was_cancelled;
+  gboolean new_user_selected;
+  gchar *selected_user;
+
+  PolkitAgentSession *session;
+  GtkWidget *dialog;
+  GMainLoop *loop;
+};
+
+struct _PolkitMateAuthenticatorClass
+{
+  GObjectClass parent_class;
+
+};
+
+enum
+{
+  COMPLETED_SIGNAL,
+  LAST_SIGNAL,
+};
+
+static guint signals[LAST_SIGNAL] = {0};
+
+G_DEFINE_TYPE (PolkitMateAuthenticator, polkit_mate_authenticator, G_TYPE_OBJECT);
+
+static void
+polkit_mate_authenticator_init (PolkitMateAuthenticator *authenticator)
+{
+}
+
+static void
+polkit_mate_authenticator_finalize (GObject *object)
+{
+  PolkitMateAuthenticator *authenticator;
+
+  authenticator = POLKIT_MATE_AUTHENTICATOR (object);
+
+  if (authenticator->authority != NULL)
+    g_object_unref (authenticator->authority);
+  g_free (authenticator->action_id);
+  g_free (authenticator->message);
+  g_free (authenticator->icon_name);
+  if (authenticator->details != NULL)
+    g_object_unref (authenticator->details);
+  g_free (authenticator->cookie);
+  g_list_foreach (authenticator->identities, (GFunc) g_object_unref, NULL);
+  g_list_free (authenticator->identities);
+
+  if (authenticator->action_desc != NULL)
+    g_object_unref (authenticator->action_desc);
+  g_strfreev (authenticator->users);
+
+  g_free (authenticator->selected_user);
+  if (authenticator->session != NULL)
+    g_object_unref (authenticator->session);
+  if (authenticator->dialog != NULL)
+    gtk_widget_destroy (authenticator->dialog);
+  if (authenticator->loop != NULL)
+    g_main_loop_unref (authenticator->loop);
+
+  if (G_OBJECT_CLASS (polkit_mate_authenticator_parent_class)->finalize != NULL)
+    G_OBJECT_CLASS (polkit_mate_authenticator_parent_class)->finalize (object);
+}
+
+static void
+polkit_mate_authenticator_class_init (PolkitMateAuthenticatorClass *klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->finalize = polkit_mate_authenticator_finalize;
+
+  /**
+   * PolkitMateAuthenticator::completed:
+   * @authenticator: A #PolkitMateAuthenticator.
+   * @gained_authorization: Whether the authorization was gained.
+   *
+   * Emitted when the authentication is completed. The user is supposed to dispose of @authenticator
+   * upon receiving this signal.
+   **/
+  signals[COMPLETED_SIGNAL] = g_signal_new ("completed",
+                                            POLKIT_MATE_TYPE_AUTHENTICATOR,
+                                            G_SIGNAL_RUN_LAST,
+                                            0,                      /* class offset     */
+                                            NULL,                   /* accumulator      */
+                                            NULL,                   /* accumulator data */
+                                            g_cclosure_marshal_VOID__BOOLEAN,
+                                            G_TYPE_NONE,
+                                            1,
+                                            G_TYPE_BOOLEAN);
+}
+
+static PolkitActionDescription *
+get_desc_for_action (PolkitAuthority *authority,
+                     const gchar     *action_id)
+{
+  GList *action_descs;
+  GList *l;
+  PolkitActionDescription *result;
+
+  result = NULL;
+
+  action_descs = polkit_authority_enumerate_actions_sync (authority,
+                                                          NULL,
+                                                          NULL);
+  for (l = action_descs; l != NULL; l = l->next)
+    {
+      PolkitActionDescription *action_desc = POLKIT_ACTION_DESCRIPTION (l->data);
+
+      if (strcmp (polkit_action_description_get_action_id (action_desc), action_id) == 0)
+        {
+          result = g_object_ref (action_desc);
+          goto out;
+        }
+    }
+
+ out:
+
+  g_list_foreach (action_descs, (GFunc) g_object_unref, NULL);
+  g_list_free (action_descs);
+
+  return result;
+}
+
+static void
+on_dialog_deleted (GtkWidget *widget,
+                   GdkEvent  *event,
+                   gpointer   user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+
+  polkit_mate_authenticator_cancel (authenticator);
+}
+
+static void
+on_user_selected (GObject    *object,
+                  GParamSpec *pspec,
+                  gpointer    user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+
+  /* clear any previous messages */
+  polkit_mate_authentication_dialog_set_info_message (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog), "");
+
+  polkit_mate_authenticator_cancel (authenticator);
+  authenticator->new_user_selected = TRUE;
+}
+
+PolkitMateAuthenticator *
+polkit_mate_authenticator_new (const gchar     *action_id,
+                                const gchar     *message,
+                                const gchar     *icon_name,
+                                PolkitDetails   *details,
+                                const gchar     *cookie,
+                                GList           *identities)
+{
+  PolkitMateAuthenticator *authenticator;
+  GList *l;
+  guint n;
+  GError *error;
+
+  authenticator = POLKIT_MATE_AUTHENTICATOR (g_object_new (POLKIT_MATE_TYPE_AUTHENTICATOR, NULL));
+
+  error = NULL;
+  authenticator->authority = polkit_authority_get_sync (NULL /* GCancellable* */, &error);
+  if (authenticator->authority == NULL)
+    {
+      g_critical ("Error getting authority: %s", error->message);
+      g_error_free (error);
+      goto error;
+    }
+
+  authenticator->action_id = g_strdup (action_id);
+  authenticator->message = g_strdup (message);
+  authenticator->icon_name = g_strdup (icon_name);
+  if (details != NULL)
+    authenticator->details = g_object_ref (details);
+  authenticator->cookie = g_strdup (cookie);
+  authenticator->identities = g_list_copy (identities);
+  g_list_foreach (authenticator->identities, (GFunc) g_object_ref, NULL);
+
+  authenticator->action_desc = get_desc_for_action (authenticator->authority,
+                                                    authenticator->action_id);
+  if (authenticator->action_desc == NULL)
+    goto error;
+
+  authenticator->users = g_new0 (gchar *, g_list_length (authenticator->identities) + 1);
+  for (l = authenticator->identities, n = 0; l != NULL; l = l->next, n++)
+    {
+      PolkitUnixUser *user = POLKIT_UNIX_USER (l->data);
+      uid_t uid;
+      struct passwd *passwd;
+
+      uid = polkit_unix_user_get_uid (user);
+      passwd = getpwuid (uid);
+      authenticator->users[n] = g_strdup (passwd->pw_name);
+    }
+
+  authenticator->dialog = polkit_mate_authentication_dialog_new
+                            (authenticator->action_id,
+                             polkit_action_description_get_vendor_name (authenticator->action_desc),
+                             polkit_action_description_get_vendor_url (authenticator->action_desc),
+                             authenticator->icon_name,
+                             authenticator->message,
+                             authenticator->details,
+                             authenticator->users);
+  g_signal_connect (authenticator->dialog,
+                    "delete-event",
+                    G_CALLBACK (on_dialog_deleted),
+                    authenticator);
+  g_signal_connect (authenticator->dialog,
+                    "notify::selected-user",
+                    G_CALLBACK (on_user_selected),
+                    authenticator);
+
+  return authenticator;
+
+ error:
+  g_object_unref (authenticator);
+  return NULL;
+}
+
+static void
+session_request (PolkitAgentSession *session,
+                 const char         *request,
+                 gboolean            echo_on,
+                 gpointer            user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+  gchar *password;
+  gchar *modified_request;
+
+  password = NULL;
+
+  //g_debug ("in conversation_pam_prompt, request='%s', echo_on=%d", request, echo_on);
+
+  /* Fix up, and localize, password prompt if it's password auth */
+  if (g_ascii_strncasecmp (request, "password:", 9) == 0)
+    {
+      if (strcmp (g_get_user_name (), authenticator->selected_user) != 0)
+        {
+          modified_request = g_strdup_printf (_("_Password for %s:"), authenticator->selected_user);
+        }
+      else
+        {
+          modified_request = g_strdup (_("_Password:"));
+        }
+    }
+  else
+    {
+      modified_request = g_strdup (request);
+    }
+
+  gtk_widget_show_all (GTK_WIDGET (authenticator->dialog));
+  gtk_window_present (GTK_WINDOW (authenticator->dialog));
+  password = polkit_mate_authentication_dialog_run_until_response_for_prompt (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog),
+                                                                               modified_request,
+                                                                               echo_on,
+                                                                               &authenticator->was_cancelled,
+                                                                               &authenticator->new_user_selected);
+
+  /* cancel auth unless user provided a password */
+  if (password == NULL)
+    {
+      polkit_mate_authenticator_cancel (authenticator);
+      goto out;
+    }
+  else
+    {
+      polkit_agent_session_response (authenticator->session, password);
+      g_free (password);
+    }
+
+out:
+  g_free (modified_request);
+}
+
+static void
+session_show_error (PolkitAgentSession *session,
+                    const gchar        *msg,
+                    gpointer            user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+  gchar *s;
+
+  s = g_strconcat ("<b>", msg, "</b>", NULL);
+  polkit_mate_authentication_dialog_set_info_message (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog), s);
+  g_free (s);
+}
+
+static void
+session_show_info (PolkitAgentSession *session,
+                   const gchar        *msg,
+                   gpointer            user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+  gchar *s;
+
+  s = g_strconcat ("<b>", msg, "</b>", NULL);
+  polkit_mate_authentication_dialog_set_info_message (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog), s);
+  g_free (s);
+
+  gtk_widget_show_all (GTK_WIDGET (authenticator->dialog));
+  gtk_window_present (GTK_WINDOW (authenticator->dialog));
+}
+
+
+static void
+session_completed (PolkitAgentSession *session,
+                   gboolean            gained_authorization,
+                   gpointer            user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+
+  authenticator->gained_authorization = gained_authorization;
+
+  //g_debug ("in conversation_done gained=%d", gained_authorization);
+
+  g_main_loop_quit (authenticator->loop);
+}
+
+
+static gboolean
+do_initiate (gpointer user_data)
+{
+  PolkitMateAuthenticator *authenticator = POLKIT_MATE_AUTHENTICATOR (user_data);
+  PolkitIdentity *identity;
+  gint num_tries;
+
+  gtk_widget_show_all (GTK_WIDGET (authenticator->dialog));
+  gtk_window_present (GTK_WINDOW (authenticator->dialog));
+  if (!polkit_mate_authentication_dialog_run_until_user_is_selected (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog)))
+    {
+      /* user cancelled the dialog */
+      /*g_debug ("User cancelled before selecting a user");*/
+      authenticator->was_cancelled = TRUE;
+      goto out;
+    }
+
+  authenticator->loop = g_main_loop_new (NULL, TRUE);
+
+  num_tries = 0;
+
+ try_again:
+
+  g_free (authenticator->selected_user);
+  authenticator->selected_user = polkit_mate_authentication_dialog_get_selected_user (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog));
+
+  /*g_debug ("Authenticating user %s", authenticator->selected_user);*/
+  identity = polkit_unix_user_new_for_name (authenticator->selected_user, NULL);
+
+  authenticator->session = polkit_agent_session_new (identity, authenticator->cookie);
+
+  g_object_unref (identity);
+
+  g_signal_connect (authenticator->session,
+                    "request",
+                    G_CALLBACK (session_request),
+                    authenticator);
+
+  g_signal_connect (authenticator->session,
+                    "show-info",
+                    G_CALLBACK (session_show_info),
+                    authenticator);
+
+  g_signal_connect (authenticator->session,
+                    "show-error",
+                    G_CALLBACK (session_show_error),
+                    authenticator);
+
+  g_signal_connect (authenticator->session,
+                    "completed",
+                    G_CALLBACK (session_completed),
+                    authenticator);
+
+  polkit_agent_session_initiate (authenticator->session);
+
+  g_main_loop_run (authenticator->loop);
+
+  /*g_debug ("gained_authorization=%d was_cancelled=%d new_user_selected=%d.",
+           authenticator->gained_authorization,
+           authenticator->was_cancelled,
+           authenticator->new_user_selected);*/
+
+  if (authenticator->new_user_selected)
+    {
+      /*g_debug ("New user selected");*/
+      authenticator->new_user_selected = FALSE;
+      g_object_unref (authenticator->session);
+      authenticator->session = NULL;
+      goto try_again;
+    }
+
+  num_tries++;
+
+  if (!authenticator->gained_authorization && !authenticator->was_cancelled)
+    {
+      if (authenticator->dialog != NULL)
+        {
+          gchar *s;
+
+          s = g_strconcat ("<b>", _("Authentication Failure"), "</b>", NULL);
+          polkit_mate_authentication_dialog_set_info_message (
+                                  POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog),
+                                  s);
+          g_free (s);
+          gtk_widget_queue_draw (authenticator->dialog);
+
+          /* shake the dialog to indicate error */
+          polkit_mate_authentication_dialog_indicate_error (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog));
+
+          if (num_tries < 3)
+            {
+              g_object_unref (authenticator->session);
+              authenticator->session = NULL;
+              goto try_again;
+            }
+        }
+    }
+
+ out:
+  g_signal_emit_by_name (authenticator, "completed", authenticator->gained_authorization);
+
+  g_object_unref (authenticator);
+
+  return FALSE;
+}
+
+void
+polkit_mate_authenticator_initiate (PolkitMateAuthenticator *authenticator)
+{
+  /* run from idle since we're going to block the main loop in the dialog (which has a recursive mainloop) */
+  g_idle_add (do_initiate, g_object_ref (authenticator));
+}
+
+void
+polkit_mate_authenticator_cancel (PolkitMateAuthenticator *authenticator)
+{
+  if (authenticator->dialog != NULL)
+    polkit_mate_authentication_dialog_cancel (POLKIT_MATE_AUTHENTICATION_DIALOG (authenticator->dialog));
+
+  authenticator->was_cancelled = TRUE;
+
+  if (authenticator->session != NULL)
+    {
+      polkit_agent_session_cancel (authenticator->session);
+    }
+}
+
+const gchar *
+polkit_mate_authenticator_get_cookie (PolkitMateAuthenticator *authenticator)
+{
+  return authenticator->cookie;
+}
+
+
diff --git a/src/polkitmateauthenticator.h b/src/polkitmateauthenticator.h
new file mode 100644
index 0000000..4c56477
--- /dev/null
+++ b/src/polkitmateauthenticator.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+#ifndef __POLKIT_MATE_AUTHENTICATOR_H
+#define __POLKIT_MATE_AUTHENTICATOR_H
+
+#include <glib-object.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define POLKIT_MATE_TYPE_AUTHENTICATOR          (polkit_mate_authenticator_get_type())
+#define POLKIT_MATE_AUTHENTICATOR(o)            (G_TYPE_CHECK_INSTANCE_CAST ((o), POLKIT_MATE_TYPE_AUTHENTICATOR, PolkitMateAuthenticator))
+#define POLKIT_MATE_AUTHENTICATOR_CLASS(k)      (G_TYPE_CHECK_CLASS_CAST((k), POLKIT_MATE_TYPE_AUTHENTICATOR, PolkitMateAuthenticatorClass))
+#define POLKIT_MATE_AUTHENTICATOR_GET_CLASS(o)  (G_TYPE_INSTANCE_GET_CLASS ((o), POLKIT_MATE_TYPE_AUTHENTICATOR, PolkitMateAuthenticatorClass))
+#define POLKIT_MATE_IS_AUTHENTICATOR(o)         (G_TYPE_CHECK_INSTANCE_TYPE ((o), POLKIT_MATE_TYPE_AUTHENTICATOR))
+#define POLKIT_MATE_IS_AUTHENTICATOR_CLASS(k)   (G_TYPE_CHECK_CLASS_TYPE ((k), POLKIT_MATE_TYPE_AUTHENTICATOR))
+
+typedef struct _PolkitMateAuthenticator PolkitMateAuthenticator;
+typedef struct _PolkitMateAuthenticatorClass PolkitMateAuthenticatorClass;
+
+GType                      polkit_mate_authenticator_get_type   (void) G_GNUC_CONST;
+PolkitMateAuthenticator  *polkit_mate_authenticator_new        (const gchar              *action_id,
+                                                                  const gchar              *message,
+                                                                  const gchar              *icon_name,
+                                                                  PolkitDetails            *details,
+                                                                  const gchar              *cookie,
+                                                                  GList                    *identities);
+void                       polkit_mate_authenticator_initiate   (PolkitMateAuthenticator *authenticator);
+void                       polkit_mate_authenticator_cancel     (PolkitMateAuthenticator *authenticator);
+const gchar               *polkit_mate_authenticator_get_cookie (PolkitMateAuthenticator *authenticator);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __POLKIT_MATE_AUTHENTICATOR_H */
diff --git a/src/polkitmatelistener.c b/src/polkitmatelistener.c
new file mode 100644
index 0000000..d70836f
--- /dev/null
+++ b/src/polkitmatelistener.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+
+#include "config.h"
+
+#include <string.h>
+
+#include "polkitmatelistener.h"
+#include "polkitmateauthenticator.h"
+
+struct _PolkitMateListener
+{
+  PolkitAgentListener parent_instance;
+
+  /* we support multiple authenticators - they are simply queued up */
+  GList *authenticators;
+
+  PolkitMateAuthenticator *active_authenticator;
+};
+
+struct _PolkitMateListenerClass
+{
+  PolkitAgentListenerClass parent_class;
+};
+
+static void polkit_mate_listener_initiate_authentication (PolkitAgentListener  *listener,
+                                                           const gchar          *action_id,
+                                                           const gchar          *message,
+                                                           const gchar          *icon_name,
+                                                           PolkitDetails        *details,
+                                                           const gchar          *cookie,
+                                                           GList                *identities,
+                                                           GCancellable         *cancellable,
+                                                           GAsyncReadyCallback   callback,
+                                                           gpointer              user_data);
+
+static gboolean polkit_mate_listener_initiate_authentication_finish (PolkitAgentListener  *listener,
+                                                                      GAsyncResult         *res,
+                                                                      GError              **error);
+
+G_DEFINE_TYPE (PolkitMateListener, polkit_mate_listener, POLKIT_AGENT_TYPE_LISTENER);
+
+static void
+polkit_mate_listener_init (PolkitMateListener *listener)
+{
+}
+
+static void
+polkit_mate_listener_finalize (GObject *object)
+{
+  PolkitMateListener *listener;
+
+  listener = POLKIT_MATE_LISTENER (object);
+
+  if (G_OBJECT_CLASS (polkit_mate_listener_parent_class)->finalize != NULL)
+    G_OBJECT_CLASS (polkit_mate_listener_parent_class)->finalize (object);
+}
+
+static void
+polkit_mate_listener_class_init (PolkitMateListenerClass *klass)
+{
+  GObjectClass *gobject_class;
+  PolkitAgentListenerClass *listener_class;
+
+  gobject_class = G_OBJECT_CLASS (klass);
+  listener_class = POLKIT_AGENT_LISTENER_CLASS (klass);
+
+  gobject_class->finalize = polkit_mate_listener_finalize;
+
+  listener_class->initiate_authentication          = polkit_mate_listener_initiate_authentication;
+  listener_class->initiate_authentication_finish   = polkit_mate_listener_initiate_authentication_finish;
+}
+
+PolkitAgentListener *
+polkit_mate_listener_new (void)
+{
+  return POLKIT_AGENT_LISTENER (g_object_new (POLKIT_MATE_TYPE_LISTENER, NULL));
+}
+
+typedef struct
+{
+  PolkitMateListener *listener;
+  PolkitMateAuthenticator *authenticator;
+
+  GSimpleAsyncResult *simple;
+  GCancellable *cancellable;
+
+  gulong cancel_id;
+} AuthData;
+
+static AuthData *
+auth_data_new (PolkitMateListener *listener,
+               PolkitMateAuthenticator *authenticator,
+               GSimpleAsyncResult *simple,
+               GCancellable *cancellable)
+{
+  AuthData *data;
+
+  data = g_new0 (AuthData, 1);
+  data->listener = g_object_ref (listener);
+  data->authenticator = g_object_ref (authenticator);
+  data->simple = g_object_ref (simple);
+  data->cancellable = g_object_ref (cancellable);
+  return data;
+}
+
+static void
+auth_data_free (AuthData *data)
+{
+  g_object_unref (data->listener);
+  g_object_unref (data->authenticator);
+  g_object_unref (data->simple);
+  if (data->cancellable != NULL && data->cancel_id > 0)
+    g_signal_handler_disconnect (data->cancellable, data->cancel_id);
+  g_object_unref (data->cancellable);
+  g_free (data);
+}
+
+static void
+maybe_initiate_next_authenticator (PolkitMateListener *listener)
+{
+  if (listener->active_authenticator == NULL && listener->authenticators != NULL)
+    {
+      polkit_mate_authenticator_initiate (POLKIT_MATE_AUTHENTICATOR (listener->authenticators->data));
+      listener->active_authenticator = listener->authenticators->data;
+    }
+}
+
+static void
+authenticator_completed (PolkitMateAuthenticator *authenticator,
+                         gboolean                  gained_authorization,
+                         gpointer                  user_data)
+{
+  AuthData *data = user_data;
+
+  data->listener->authenticators = g_list_remove (data->listener->authenticators, authenticator);
+  if (authenticator == data->listener->active_authenticator)
+    data->listener->active_authenticator = NULL;
+
+  g_object_unref (authenticator);
+
+  g_simple_async_result_complete (data->simple);
+  g_object_unref (data->simple);
+
+  maybe_initiate_next_authenticator (data->listener);
+
+  auth_data_free (data);
+}
+
+static void
+cancelled_cb (GCancellable *cancellable,
+              gpointer user_data)
+{
+  AuthData *data = user_data;
+
+  polkit_mate_authenticator_cancel (data->authenticator);
+}
+
+static void
+polkit_mate_listener_initiate_authentication (PolkitAgentListener  *agent_listener,
+                                               const gchar          *action_id,
+                                               const gchar          *message,
+                                               const gchar          *icon_name,
+                                               PolkitDetails        *details,
+                                               const gchar          *cookie,
+                                               GList                *identities,
+                                               GCancellable         *cancellable,
+                                               GAsyncReadyCallback   callback,
+                                               gpointer              user_data)
+{
+  PolkitMateListener *listener = POLKIT_MATE_LISTENER (agent_listener);
+  GSimpleAsyncResult *simple;
+  PolkitMateAuthenticator *authenticator;
+  AuthData *data;
+
+  simple = g_simple_async_result_new (G_OBJECT (listener),
+                                      callback,
+                                      user_data,
+                                      polkit_mate_listener_initiate_authentication);
+
+  authenticator = polkit_mate_authenticator_new (action_id,
+                                                  message,
+                                                  icon_name,
+                                                  details,
+                                                  cookie,
+                                                  identities);
+  if (authenticator == NULL)
+    {
+      g_simple_async_result_set_error (simple,
+                                       POLKIT_ERROR,
+                                       POLKIT_ERROR_FAILED,
+                                       "Error creating authentication object");
+      g_simple_async_result_complete (simple);
+      goto out;
+    }
+
+  data = auth_data_new (listener, authenticator, simple, cancellable);
+
+  g_signal_connect (authenticator,
+                    "completed",
+                    G_CALLBACK (authenticator_completed),
+                    data);
+
+  if (cancellable != NULL)
+    {
+      data->cancel_id = g_signal_connect (cancellable,
+                                          "cancelled",
+                                          G_CALLBACK (cancelled_cb),
+                                          data);
+    }
+
+  listener->authenticators = g_list_append (listener->authenticators, authenticator);
+
+  maybe_initiate_next_authenticator (listener);
+
+ out:
+  ;
+}
+
+static gboolean
+polkit_mate_listener_initiate_authentication_finish (PolkitAgentListener  *listener,
+                                                      GAsyncResult         *res,
+                                                      GError              **error)
+{
+  GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
+
+  g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == polkit_mate_listener_initiate_authentication);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
+
+  return TRUE;
+}
+
diff --git a/src/polkitmatelistener.h b/src/polkitmatelistener.h
new file mode 100644
index 0000000..c85b3b0
--- /dev/null
+++ b/src/polkitmatelistener.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * Author: David Zeuthen <[email protected]>
+ */
+
+#ifndef __POLKIT_MATE_LISTENER_H
+#define __POLKIT_MATE_LISTENER_H
+
+#include <polkitagent/polkitagent.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define POLKIT_MATE_TYPE_LISTENER          (polkit_mate_listener_get_type())
+#define POLKIT_MATE_LISTENER(o)            (G_TYPE_CHECK_INSTANCE_CAST ((o), POLKIT_MATE_TYPE_LISTENER, PolkitMateListener))
+#define POLKIT_MATE_LISTENER_CLASS(k)      (G_TYPE_CHECK_CLASS_CAST((k), POLKIT_MATE_TYPE_LISTENER, PolkitMateListenerClass))
+#define POLKIT_MATE_LISTENER_GET_CLASS(o)  (G_TYPE_INSTANCE_GET_CLASS ((o), POLKIT_MATE_TYPE_LISTENER, PolkitMateListenerClass))
+#define POLKIT_MATE_IS_LISTENER(o)         (G_TYPE_CHECK_INSTANCE_TYPE ((o), POLKIT_MATE_TYPE_LISTENER))
+#define POLKIT_MATE_IS_LISTENER_CLASS(k)   (G_TYPE_CHECK_CLASS_TYPE ((k), POLKIT_MATE_TYPE_LISTENER))
+
+typedef struct _PolkitMateListener PolkitMateListener;
+typedef struct _PolkitMateListenerClass PolkitMateListenerClass;
+
+GType                 polkit_mate_listener_get_type   (void) G_GNUC_CONST;
+PolkitAgentListener  *polkit_mate_listener_new        (void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __POLKIT_MATE_LISTENER_H */