Integrates token authentication.

lang/main.json

         "password": "password",
         "userPassword": "user password",
         "token": "token",
+        "tokenAuthFailed": "Failed to authenticate with XMPP server: invalid token",
         "displayNameRequired": "Please enter your display name:",
         "extensionRequired": "Extension required:",
         "firefoxExtensionPrompt": "You need to install a Firefox extension in order to use screen sharing. Please try again after you <a href='__url__'>get it from here</a>!"

modules/UI/UI.js

     });
     APP.xmpp.addListener(XMPPEvents.PROMPT_FOR_LOGIN, function (callback) {
         // FIXME: re-use LoginDialog which supports retries
-        UI.showLoginPopup(callback);
+        if (config.token) {
+            messageHandler.showError("dialog.error", "dialog.tokenAuthFailed");
+        } else {
+            UI.showLoginPopup(callback);
+        }
     });
 
     APP.xmpp.addListener(XMPPEvents.FOCUS_DISCONNECTED, function (focusComponent, retrySec) {

modules/util/RandomUtil.js

+
+/**
+ * Generates random hex number within the range [min, max]
+ * @param max the maximum value for the generated number
+ * @param min the minimum value for the generated number
+ * @returns random hex number
+ */
+function rangeRandomHex(min, max)
+{
+    return Math.floor(Math.random() * (max - min) + min).toString(16);
+}
+
+/**
+ * Exported interface.
+ */
+var RandomUtil = {
+    /**
+     * Generates hex number with length 4
+     */
+    random4digitsHex: function() {
+        return rangeRandomHex(4096, 65535);
+    },
+    /**
+     * Generates hex number with length 8
+     */
+    random8digitsHex: function() {
+        return rangeRandomHex(268435456, 4294967295);
+    },
+    /**
+     * Generates hex number with length 12
+     */
+    random12digitsHex: function() {
+        return rangeRandomHex(17592186044416, 281474976710655);
+    }
+};
+
+module.exports = RandomUtil;

modules/xmpp/strophe.emuc.js

                 delete this.presMap["startMuted"];
             }
 
+            if (config.token) {
+                pres.c('token', { xmlns: 'http://jitsi.org/jitmeet/auth-token'}).t(config.token).up();
+            }
+
             pres.up();
             this.connection.send(pres);
         },

modules/xmpp/xmpp.js

 var RTCEvents = require("../../service/RTC/RTCEvents");
 var XMPPEvents = require("../../service/xmpp/XMPPEvents");
 var retry = require('retry');
+var RandomUtil = require("../util/RandomUtil");
 
 var eventEmitter = new EventEmitter();
 var connection = null;
 var authenticatedUser = false;
 
+/**
+ * Utility method that generates user name based on random hex values.
+ * Eg. 12345678-1234-1234-12345678
+ * @returns {string}
+ */
+function generateUserName() {
+    return RandomUtil.random8digitsHex() + "-" + RandomUtil.random4digitsHex() + "-" +
+        RandomUtil.random4digitsHex() + "-" + RandomUtil.random8digitsHex();
+}
+
 function connect(jid, password) {
 
     var faultTolerantConnect = retry.operation({
             configDomain = config.hosts.domain;
         }
         var jid = configDomain || window.location.hostname;
-        connect(jid, null);
+        var password = null;
+        if (config.token) {
+            password = config.token;
+            if (config.id) {
+                jid = config.id + "@" + jid;
+            } else {
+                jid = generateUserName() + "@" + jid;
+            }
+        }
+        connect(jid, password);
     },
     createConnection: function () {
         var bosh = config.bosh || '/http-bind';