chrome/browser/resources/gaia_auth/main.js

   1 // Copyright (c) 2012 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  * Authenticator class wraps the communications between Gaia and its host.
   7  */
   8 function Authenticator() {
   9 }
  10
  11 /**
  12  * Gaia auth extension url origin.
  13  * @type {string}
  14  */
  15 Authenticator.THIS_EXTENSION_ORIGIN =
  16     'chrome-extension://mfffpogegjflfpflabcdkioaeobkgjik';
  17
  18 /**
  19  * The lowest version of the credentials passing API supported.
  20  * @type {number}
  21  */
  22 Authenticator.MIN_API_VERSION_VERSION = 1;
  23
  24 /**
  25  * The highest version of the credentials passing API supported.
  26  * @type {number}
  27  */
  28 Authenticator.MAX_API_VERSION_VERSION = 1;
  29
  30 /**
  31  * The key types supported by the credentials passing API.
  32  * @type {Array} Array of strings.
  33  */
  34 Authenticator.API_KEY_TYPES = [
  35   'KEY_TYPE_PASSWORD_PLAIN',
  36 ];
  37
  38 /**
  39  * Singleton getter of Authenticator.
  40  * @return {Object} The singleton instance of Authenticator.
  41  */
  42 Authenticator.getInstance = function() {
  43   if (!Authenticator.instance_) {
  44     Authenticator.instance_ = new Authenticator();
  45   }
  46   return Authenticator.instance_;
  47 };
  48
  49 Authenticator.prototype = {
  50   email_: null,
  51
  52   // Depending on the key type chosen, this will contain the plain text password
  53   // or a credential derived from it along with the information required to
  54   // repeat the derivation, such as a salt. The information will be encoded so
  55   // that it contains printable ASCII characters only. The exact encoding is TBD
  56   // when support for key types other than plain text password is added.
  57   passwordBytes_: null,
  58
  59   attemptToken_: null,
  60
  61   // Input params from extension initialization URL.
  62   inputLang_: undefined,
  63   intputEmail_: undefined,
  64
  65   isSAMLFlow_: false,
  66   isSAMLEnabled_: false,
  67   supportChannel_: null,
  68
  69   GAIA_URL: 'https://accounts.google.com/',
  70   GAIA_PAGE_PATH: 'ServiceLogin?skipvpage=true&sarp=1&rm=hide',
  71   PARENT_PAGE: 'chrome://oobe/',
  72   SERVICE_ID: 'chromeoslogin',
  73   CONTINUE_URL: Authenticator.THIS_EXTENSION_ORIGIN + '/success.html',
  74   CONSTRAINED_FLOW_SOURCE: 'chrome',
  75
  76   initialize: function() {
  77     var params = getUrlSearchParams(location.search);
  78     this.parentPage_ = params.parentPage || this.PARENT_PAGE;
  79     this.gaiaUrl_ = params.gaiaUrl || this.GAIA_URL;
  80     this.gaiaPath_ = params.gaiaPath || this.GAIA_PAGE_PATH;
  81     this.inputLang_ = params.hl;
  82     this.inputEmail_ = params.email;
  83     this.service_ = params.service || this.SERVICE_ID;
  84     this.continueUrl_ = params.continueUrl || this.CONTINUE_URL;
  85     this.desktopMode_ = params.desktopMode == '1';
  86     this.isConstrainedWindow_ = params.constrained == '1';
  87     this.initialFrameUrl_ = params.frameUrl || this.constructInitialFrameUrl_();
  88     this.initialFrameUrlWithoutParams_ = stripParams(this.initialFrameUrl_);
  89
  90     document.addEventListener('DOMContentLoaded', this.onPageLoad_.bind(this));
  91     if (!this.desktopMode_) {
  92       // SAML is always enabled in desktop mode, thus no need to listen for
  93       // enableSAML event.
  94       document.addEventListener('enableSAML', this.onEnableSAML_.bind(this));
  95     }
  96   },
  97
  98   isGaiaMessage_: function(msg) {
  99     // Not quite right, but good enough.
 100     return this.gaiaUrl_.indexOf(msg.origin) == 0 ||
 101            this.GAIA_URL.indexOf(msg.origin) == 0;
 102   },
 103
 104   isInternalMessage_: function(msg) {
 105     return msg.origin == Authenticator.THIS_EXTENSION_ORIGIN;
 106   },
 107
 108   isParentMessage_: function(msg) {
 109     return msg.origin == this.parentPage_;
 110   },
 111
 112   constructInitialFrameUrl_: function() {
 113     var url = this.gaiaUrl_ + this.gaiaPath_;
 114
 115     url = appendParam(url, 'service', this.service_);
 116     url = appendParam(url, 'continue', this.continueUrl_);
 117     if (this.inputLang_)
 118       url = appendParam(url, 'hl', this.inputLang_);
 119     if (this.inputEmail_)
 120       url = appendParam(url, 'Email', this.inputEmail_);
 121     if (this.isConstrainedWindow_)
 122       url = appendParam(url, 'source', this.CONSTRAINED_FLOW_SOURCE);
 123     return url;
 124   },
 125
 126   onPageLoad_: function() {
 127     window.addEventListener('message', this.onMessage.bind(this), false);
 128
 129     var gaiaFrame = $('gaia-frame');
 130     gaiaFrame.src = this.initialFrameUrl_;
 131
 132     if (this.desktopMode_) {
 133       var handler = function() {
 134         this.onLoginUILoaded_();
 135         gaiaFrame.removeEventListener('load', handler);
 136
 137         this.initDesktopChannel_();
 138       }.bind(this);
 139       gaiaFrame.addEventListener('load', handler);
 140     }
 141   },
 142
 143   initDesktopChannel_: function() {
 144     this.supportChannel_ = new Channel();
 145     this.supportChannel_.connect('authMain');
 146
 147     var channelConnected = false;
 148     this.supportChannel_.registerMessage('channelConnected', function() {
 149       channelConnected = true;
 150
 151       this.supportChannel_.send({
 152         name: 'initDesktopFlow',
 153         gaiaUrl: this.gaiaUrl_,
 154         continueUrl: stripParams(this.continueUrl_),
 155         isConstrainedWindow: this.isConstrainedWindow_
 156       });
 157       this.supportChannel_.registerMessage(
 158           'switchToFullTab', this.switchToFullTab_.bind(this));
 159       this.supportChannel_.registerMessage(
 160           'completeLogin', this.completeLogin_.bind(this));
 161
 162       this.onEnableSAML_();
 163     }.bind(this));
 164
 165     window.setTimeout(function() {
 166       if (!channelConnected) {
 167         // Re-initialize the channel if it is not connected properly, e.g.
 168         // connect may be called before background script started running.
 169         this.initDesktopChannel_();
 170       }
 171     }.bind(this), 200);
 172   },
 173
 174   /**
 175    * Invoked when the login UI is initialized or reset.
 176    */
 177   onLoginUILoaded_: function() {
 178     var msg = {
 179       'method': 'loginUILoaded'
 180     };
 181     window.parent.postMessage(msg, this.parentPage_);
 182   },
 183
 184   /**
 185    * Invoked when the background script sends a message to indicate that the
 186    * current content does not fit in a constrained window.
 187    * @param {Object=} opt_extraMsg Optional extra info to send.
 188    */
 189   switchToFullTab_: function(msg) {
 190     var parentMsg = {
 191       'method': 'switchToFullTab',
 192       'url': msg.url
 193     };
 194     window.parent.postMessage(parentMsg, this.parentPage_);
 195   },
 196
 197   /**
 198    * Invoked when the signin flow is complete.
 199    * @param {Object=} opt_extraMsg Optional extra info to send.
 200    */
 201   completeLogin_: function(opt_extraMsg) {
 202     var msg = {
 203       'method': 'completeLogin',
 204       'email': (opt_extraMsg && opt_extraMsg.email) || this.email_,
 205       'password': (opt_extraMsg && opt_extraMsg.password) ||
 206                   this.passwordBytes_,
 207       'usingSAML': this.isSAMLFlow_,
 208       'chooseWhatToSync': this.chooseWhatToSync_ || false,
 209       'skipForNow': opt_extraMsg && opt_extraMsg.skipForNow,
 210       'sessionIndex': opt_extraMsg && opt_extraMsg.sessionIndex
 211     };
 212     window.parent.postMessage(msg, this.parentPage_);
 213     if (this.isSAMLEnabled_)
 214       this.supportChannel_.send({name: 'resetAuth'});
 215   },
 216
 217   /**
 218    * Invoked when 'enableSAML' event is received to initialize SAML support on
 219    * Chrome OS, or when initDesktopChannel_ is called on desktop.
 220    */
 221   onEnableSAML_: function() {
 222     this.isSAMLEnabled_ = true;
 223     this.isSAMLFlow_ = false;
 224
 225     if (!this.supportChannel_) {
 226       this.supportChannel_ = new Channel();
 227       this.supportChannel_.connect('authMain');
 228     }
 229
 230     this.supportChannel_.registerMessage(
 231         'onAuthPageLoaded', this.onAuthPageLoaded_.bind(this));
 232     this.supportChannel_.registerMessage(
 233         'onInsecureContentBlocked', this.onInsecureContentBlocked_.bind(this));
 234     this.supportChannel_.registerMessage(
 235         'apiCall', this.onAPICall_.bind(this));
 236     this.supportChannel_.send({
 237       name: 'setGaiaUrl',
 238       gaiaUrl: this.gaiaUrl_
 239     });
 240     if (!this.desktopMode_ && this.gaiaUrl_.indexOf('https://') == 0) {
 241       // Abort the login flow when content served over an unencrypted connection
 242       // is detected on Chrome OS. This does not apply to tests that explicitly
 243       // set a non-https GAIA URL and want to perform all authentication over
 244       // http.
 245       this.supportChannel_.send({
 246         name: 'setBlockInsecureContent',
 247         blockInsecureContent: true
 248       });
 249     }
 250   },
 251
 252   /**
 253    * Invoked when the background page sends 'onHostedPageLoaded' message.
 254    * @param {!Object} msg Details sent with the message.
 255    */
 256   onAuthPageLoaded_: function(msg) {
 257     var isSAMLPage = msg.url.indexOf(this.gaiaUrl_) != 0;
 258
 259     if (isSAMLPage && !this.isSAMLFlow_) {
 260       // GAIA redirected to a SAML login page. The credentials provided to this
 261       // page will determine what user gets logged in. The credentials obtained
 262       // from the GAIA login form are no longer relevant and can be discarded.
 263       this.isSAMLFlow_ = true;
 264       this.email_ = null;
 265       this.passwordBytes_ = null;
 266     }
 267
 268     window.parent.postMessage({
 269       'method': 'authPageLoaded',
 270       'isSAML': this.isSAMLFlow_,
 271       'domain': extractDomain(msg.url)
 272     }, this.parentPage_);
 273   },
 274
 275   /**
 276    * Invoked when the background page sends an 'onInsecureContentBlocked'
 277    * message.
 278    * @param {!Object} msg Details sent with the message.
 279    */
 280   onInsecureContentBlocked_: function(msg) {
 281     window.parent.postMessage({
 282       'method': 'insecureContentBlocked',
 283       'url': stripParams(msg.url)
 284     }, this.parentPage_);
 285   },
 286
 287   /**
 288    * Invoked when one of the credential passing API methods is called by a SAML
 289    * provider.
 290    * @param {!Object} msg Details of the API call.
 291    */
 292   onAPICall_: function(msg) {
 293     var call = msg.call;
 294     if (call.method == 'initialize') {
 295       if (!Number.isInteger(call.requestedVersion) ||
 296           call.requestedVersion < Authenticator.MIN_API_VERSION_VERSION) {
 297         this.sendInitializationFailure_();
 298         return;
 299       }
 300
 301       this.apiVersion_ = Math.min(call.requestedVersion,
 302                                   Authenticator.MAX_API_VERSION_VERSION);
 303       this.initialized_ = true;
 304       this.sendInitializationSuccess_();
 305       return;
 306     }
 307
 308     if (call.method == 'add') {
 309       if (Authenticator.API_KEY_TYPES.indexOf(call.keyType) == -1) {
 310         console.error('Authenticator.onAPICall_: unsupported key type');
 311         return;
 312       }
 313       this.apiToken_ = call.token;
 314       this.email_ = call.user;
 315       this.passwordBytes_ = call.passwordBytes;
 316     } else if (call.method == 'confirm') {
 317       if (call.token != this.apiToken_)
 318         console.error('Authenticator.onAPICall_: token mismatch');
 319     } else {
 320       console.error('Authenticator.onAPICall_: unknown message');
 321     }
 322   },
 323
 324   sendInitializationSuccess_: function() {
 325     this.supportChannel_.send({name: 'apiResponse', response: {
 326       result: 'initialized',
 327       version: this.apiVersion_,
 328       keyTypes: Authenticator.API_KEY_TYPES
 329     }});
 330   },
 331
 332   sendInitializationFailure_: function() {
 333     this.supportChannel_.send({
 334       name: 'apiResponse',
 335       response: {result: 'initialization_failed'}
 336     });
 337   },
 338
 339   onConfirmLogin_: function() {
 340     if (!this.isSAMLFlow_) {
 341       this.completeLogin_();
 342       return;
 343     }
 344
 345     var apiUsed = !!this.passwordBytes_;
 346
 347     // Retrieve the e-mail address of the user who just authenticated from GAIA.
 348     window.parent.postMessage({method: 'retrieveAuthenticatedUserEmail',
 349                                attemptToken: this.attemptToken_,
 350                                apiUsed: apiUsed},
 351                               this.parentPage_);
 352
 353     if (!apiUsed) {
 354       this.supportChannel_.sendWithCallback(
 355           {name: 'getScrapedPasswords'},
 356           function(passwords) {
 357             if (passwords.length == 0) {
 358               window.parent.postMessage(
 359                   {method: 'noPassword', email: this.email_},
 360                   this.parentPage_);
 361             } else {
 362               window.parent.postMessage({method: 'confirmPassword',
 363                                          email: this.email_,
 364                                          passwordCount: passwords.length},
 365                                         this.parentPage_);
 366             }
 367           }.bind(this));
 368     }
 369   },
 370
 371   maybeCompleteSAMLLogin_: function() {
 372     // SAML login is complete when the user's e-mail address has been retrieved
 373     // from GAIA and the user has successfully confirmed the password.
 374     if (this.email_ !== null && this.passwordBytes_ !== null)
 375       this.completeLogin_();
 376   },
 377
 378   onVerifyConfirmedPassword_: function(password) {
 379     this.supportChannel_.sendWithCallback(
 380         {name: 'getScrapedPasswords'},
 381         function(passwords) {
 382           for (var i = 0; i < passwords.length; ++i) {
 383             if (passwords[i] == password) {
 384               this.passwordBytes_ = passwords[i];
 385               this.maybeCompleteSAMLLogin_();
 386               return;
 387             }
 388           }
 389           window.parent.postMessage(
 390               {method: 'confirmPassword', email: this.email_},
 391               this.parentPage_);
 392         }.bind(this));
 393   },
 394
 395   onMessage: function(e) {
 396     var msg = e.data;
 397     if (msg.method == 'attemptLogin' && this.isGaiaMessage_(e)) {
 398       this.email_ = msg.email;
 399       this.passwordBytes_ = msg.password;
 400       this.attemptToken_ = msg.attemptToken;
 401       this.chooseWhatToSync_ = msg.chooseWhatToSync;
 402       this.isSAMLFlow_ = false;
 403       if (this.isSAMLEnabled_)
 404         this.supportChannel_.send({name: 'startAuth'});
 405     } else if (msg.method == 'clearOldAttempts' && this.isGaiaMessage_(e)) {
 406       this.email_ = null;
 407       this.passwordBytes_ = null;
 408       this.attemptToken_ = null;
 409       this.isSAMLFlow_ = false;
 410       this.onLoginUILoaded_();
 411       if (this.isSAMLEnabled_)
 412         this.supportChannel_.send({name: 'resetAuth'});
 413     } else if (msg.method == 'setAuthenticatedUserEmail' &&
 414                this.isParentMessage_(e)) {
 415       if (this.attemptToken_ == msg.attemptToken) {
 416         this.email_ = msg.email;
 417         this.maybeCompleteSAMLLogin_();
 418       }
 419     } else if (msg.method == 'confirmLogin' && this.isInternalMessage_(e)) {
 420       if (this.attemptToken_ == msg.attemptToken)
 421         this.onConfirmLogin_();
 422       else
 423         console.error('Authenticator.onMessage: unexpected attemptToken!?');
 424     } else if (msg.method == 'verifyConfirmedPassword' &&
 425                this.isParentMessage_(e)) {
 426       this.onVerifyConfirmedPassword_(msg.password);
 427     } else if (msg.method == 'redirectToSignin' &&
 428                this.isParentMessage_(e)) {
 429       $('gaia-frame').src = this.constructInitialFrameUrl_();
 430     } else {
 431        console.error('Authenticator.onMessage: unknown message + origin!?');
 432     }
 433   }
 434 };
 435
 436 Authenticator.getInstance().initialize();