chrome/browser/resources/cryptotoken/cryptotokenbackground.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview CryptoToken background page
   7  */
   8
   9 'use strict';
  10
  11 /** @const */
  12 var BROWSER_SUPPORTS_TLS_CHANNEL_ID = true;
  13
  14 /** @const */
  15 var LOG_SAVER_EXTENSION_ID = 'fjajfjhkeibgmiggdfehjplbhmfkialk';
  16
  17 // Singleton tracking available devices.
  18 var gnubbies = new Gnubbies();
  19 HidGnubbyDevice.register(gnubbies);
  20 UsbGnubbyDevice.register(gnubbies);
  21
  22 var TIMER_FACTORY = new CountdownTimerFactory();
  23
  24 var FACTORY_REGISTRY = new FactoryRegistry(
  25     new GoogleApprovedOrigins(),
  26     TIMER_FACTORY,
  27     new GstaticOriginChecker(),
  28     new UsbHelper(),
  29     new XhrTextFetcher());
  30
  31 var DEVICE_FACTORY_REGISTRY = new DeviceFactoryRegistry(
  32     new UsbGnubbyFactory(gnubbies),
  33     TIMER_FACTORY,
  34     new GoogleCorpIndividualAttestation());
  35
  36 /**
  37  * Listen to individual messages sent from (whitelisted) webpages via
  38  * chrome.runtime.sendMessage
  39  * @param {*} request The received request
  40  * @param {!MessageSender} sender The message sender
  41  * @param {function(*): void} sendResponse A callback that delivers a response
  42  * @return {boolean}
  43  */
  44 function messageHandlerExternal(request, sender, sendResponse) {
  45   if (sender.id && sender.id === LOG_SAVER_EXTENSION_ID) {
  46     return handleLogSaverMessage(request);
  47   }
  48   var closeable = handleWebPageRequest(/** @type {Object} */(request),
  49       sender, function(response) {
  50     response['requestId'] = request['requestId'];
  51     try {
  52       sendResponse(response);
  53     } catch (e) {
  54       console.warn(UTIL_fmt('caught: ' + e.message));
  55     }
  56   });
  57   return true;  // Tell Chrome not to destroy sendResponse yet
  58 }
  59 chrome.runtime.onMessageExternal.addListener(messageHandlerExternal);
  60
  61 // Listen to direct connection events, and wire up a message handler on the port
  62 chrome.runtime.onConnectExternal.addListener(function(port) {
  63   var closeable;
  64   port.onMessage.addListener(function(request) {
  65     closeable = handleWebPageRequest(request, port.sender,
  66         function(response) {
  67           response['requestId'] = request['requestId'];
  68           port.postMessage(response);
  69         });
  70   });
  71   port.onDisconnect.addListener(function() {
  72     if (closeable) {
  73       closeable.close();
  74     }
  75   });
  76 });
  77
  78 /**
  79  * Handles messages from the log-saver app. Temporarily replaces UTIL_fmt with
  80  * a wrapper that also sends formatted messages to the app.
  81  * @param {*} request The message received from the app
  82  * @return {boolean} Used as chrome.runtime.onMessage handler return value
  83  */
  84 function handleLogSaverMessage(request) {
  85   if (request === 'start') {
  86     if (originalUtilFmt_) {
  87       // We're already sending
  88       return false;
  89     }
  90     originalUtilFmt_ = UTIL_fmt;
  91     UTIL_fmt = function(s) {
  92       var line = originalUtilFmt_(s);
  93       chrome.runtime.sendMessage(LOG_SAVER_EXTENSION_ID, line);
  94       return line;
  95     };
  96   } else if (request === 'stop') {
  97     if (originalUtilFmt_) {
  98       UTIL_fmt = originalUtilFmt_;
  99       originalUtilFmt_ = null;
 100     }
 101   }
 102   return false;
 103 }
 104
 105 /** @private */
 106 var originalUtilFmt_ = null;