[gnome-shell/wip/smartcard: 3/3] gdm: add code to use settings-daemon smartcard service

[Ray Strode <halfline src gnome org>]

commit 2a9569064aea210e41fc1b18533f0feb2c91b94b
Author: Ray Strode <rstrode redhat com>
Date:   Thu May 30 10:18:51 2013 -0400

    gdm: add code to use settings-daemon smartcard service
    
    gnome-settings-daemon monitors smartcard insertion and removal
    events on the system and then exports a model of the current
    smartcard topology over the bus using the D-Bus ObjectManager interface.
    
    This commit adds the support code needed in gnome-shell to talk to
    the gnome-settings-daemon service.
    
    A future commit will use this code to inform the login screen
    when a user inserts a smartcard (so it can react appropriately)

 js/Makefile.am        |    1 +
 js/gdm/loginDialog.js |    2 +
 js/gdm/smartcard.js   |   89 +++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+), 0 deletions(-)
---
diff --git a/js/Makefile.am b/js/Makefile.am
index d888fb9..418940b 100644
--- a/js/Makefile.am
+++ b/js/Makefile.am
@@ -22,6 +22,7 @@ nobase_dist_js_DATA =         \
        gdm/loginDialog.js      \
        gdm/powerMenu.js        \
        gdm/realmd.js           \
+       gdm/smartcard.js        \
        gdm/util.js             \
        extensionPrefs/main.js  \
        misc/config.js          \
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index cbc652b..955d352 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -35,6 +35,7 @@ const Gdm = imports.gi.Gdm;
 
 const Batch = imports.gdm.batch;
 const GdmUtil = imports.gdm.util;
+const Smartcard = imports.gdm.smartcard;
 const Main = imports.ui.main;
 const ModalDialog = imports.ui.modalDialog;
 const Tweener = imports.ui.tweener;
@@ -484,6 +485,7 @@ const LoginDialog = new Lang.Class({
 
         this._userManager = AccountsService.UserManager.get_default()
         this._greeterClient = new Gdm.Client();
+        this._smartcardManager = new Smartcard.SmartcardManager();
 
         if (GLib.getenv('GDM_GREETER_TEST') != '1') {
             this._greeter = this._greeterClient.get_greeter_sync(null);
diff --git a/js/gdm/smartcard.js b/js/gdm/smartcard.js
new file mode 100644
index 0000000..1821670
--- /dev/null
+++ b/js/gdm/smartcard.js
@@ -0,0 +1,89 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+
+const Gio = imports.gi.Gio;
+const Lang = imports.lang;
+const Shell = imports.gi.Shell;
+const Signals = imports.signals;
+
+const ObjectManager = imports.misc.objectManager;
+
+const _SMARTCARD_SERVICE_DBUS_NAME = "org.gnome.SettingsDaemon.Smartcard";
+
+const SmartcardManagerIface = <interface name="org.gnome.Smartcard.Manager">
+  <method name="GetLoginToken">
+      <arg name="token" type="o" direction="out"/>
+  </method>
+  <method name="GetInsertedTokens">
+      <arg name="tokens" type="ao" direction="out"/>
+  </method>
+</interface>;
+
+const SmartcardTokenIface = <interface name="org.gnome.Smartcard.Token">
+  <property name="Name" type="s" access="read"/>
+  <property name="Driver" type="o" access="read"/>
+  <property name="IsInserted" type="b" access="read"/>
+  <property name="UsedToLogin" type="b" access="read"/>
+</interface>;
+
+const SmartcardDriverIface = <interface name="org.gnome.Smartcard.Driver">
+  <property name="Library" type="s" access="read"/>
+  <property name="Description" type="s" access="read"/>
+</interface>;
+
+const SmartcardManager = new Lang.Class({
+    Name: 'SmartcardManager',
+    _init: function() {
+        this._objectManager = new ObjectManager.ObjectManager({ connection: Gio.DBus.session,
+                                                                name: _SMARTCARD_SERVICE_DBUS_NAME,
+                                                                objectPath: 
'/org/gnome/SettingsDaemon/Smartcard',
+                                                                knownInterfaces: [ SmartcardManagerIface,
+                                                                                   SmartcardTokenIface,
+                                                                                   SmartcardDriverIface ],
+                                                                onLoaded: Lang.bind(this, this._onLoaded) });
+        this._tokens = {};
+    },
+
+    _onLoaded: function() {
+        let tokens = this._objectManager.getProxiesForInterface('org.gnome.Smartcard.Token');
+
+        for (let i = 0; i < tokens.length; i++)
+            this._addToken(tokens[i]);
+
+        this._objectManager.connect('interface-added', Lang.bind(this, function(interfaceName, proxy) {
+                                        if (interfaceName == 'org.gnome.Smartcard.Token')
+                                            this._addToken(proxy);
+                                    }));
+
+        this._objectManager.connect('interface-removed', Lang.bind(this, function(interfaceName, proxy) {
+                                        if (interfaceName == 'org.gnome.Smartcard.Token')
+                                            this._removeToken(proxy);
+                                    }));
+    },
+
+    _addToken: function(token) {
+        if (this._tokens[token.get_object_path()])
+            return;
+
+        this._tokens[token.get_object_path()] = token;
+
+        token.connect('g-properties-changed',
+                      Lang.bind(this, function(proxy, properties) {
+                          if ('IsInserted' in properties.deep_unpack()) {
+                              if (token.IsInserted)
+                                  this.emit('token-inserted', token.Name);
+                              else
+                                  this.emit('token-removed', token.Name);
+                          }
+                      }));
+    },
+
+    _removeToken: function(token) {
+        if (!this._tokens[token.get_object_path()])
+            return;
+
+        token.disconnectAll();
+        delete this._tokens[token.get_object_path()];
+    }
+});
+Signals.addSignalMethods(SmartcardManager.prototype);
+