[BS5] remove u2f-api.js

data/web/js/build/011-u2f-api.js

@@ -1,778 +0,0 @@
-//Copyright 2014-2015 Google Inc. All rights reserved.
-
-//Use of this source code is governed by a BSD-style
-//license that can be found in the LICENSE file or at
-//https://developers.google.com/open-source/licenses/bsd
-
-// ref: https://github.com/google/u2f-ref-code/blob/master/u2f-gae-demo/war/js/u2f-api.js
-
-/**
- * @fileoverview The U2F api.
- */
-'use strict';
-
-/**
- * Modification:
- * Wrap implementation so that we can exit if window.u2f is already supplied by the browser (see below).
- */
-(function (root) {
-    /**
-     * Modification:
-     * Only continue load this library if window.u2f is not already supplied by the browser.
-     */
-    var browserImplementsU2f = !!((typeof root.u2f !== 'undefined') && root.u2f.register);
-
-    if (browserImplementsU2f) {
-        root.u2f.isSupported = true;
-        return;
-    }
-
-    /**
-     * Namespace for the U2F api.
-     * @type {Object}
-     */
-    var u2f = root.u2f || {};
-
-    /**
-     * Modification:
-     * Check if browser supports U2F API before this wrapper was added.
-     */
-    u2f.isSupported = !!(((typeof u2f !== 'undefined') && u2f.register) || ((typeof chrome !== 'undefined') && chrome.runtime));
-
-    /**
-     * FIDO U2F Javascript API Version
-     * @number
-     */
-    var js_api_version;
-
-    /**
-     * The U2F extension id
-     * @const {string}
-     */
-    // The Chrome packaged app extension ID.
-    // Uncomment this if you want to deploy a server instance that uses
-    // the package Chrome app and does not require installing the U2F Chrome extension.
-    u2f.EXTENSION_ID = 'kmendfapggjehodndflmmgagdbamhnfd';
-    // The U2F Chrome extension ID.
-    // Uncomment this if you want to deploy a server instance that uses
-    // the U2F Chrome extension to authenticate.
-    // u2f.EXTENSION_ID = 'pfboblefjcgdjicmnffhdgionmgcdmne';
-
-
-    /**
-     * Message types for messsages to/from the extension
-     * @const
-     * @enum {string}
-     */
-    u2f.MessageTypes = {
-        'U2F_REGISTER_REQUEST': 'u2f_register_request',
-        'U2F_REGISTER_RESPONSE': 'u2f_register_response',
-        'U2F_SIGN_REQUEST': 'u2f_sign_request',
-        'U2F_SIGN_RESPONSE': 'u2f_sign_response',
-        'U2F_GET_API_VERSION_REQUEST': 'u2f_get_api_version_request',
-        'U2F_GET_API_VERSION_RESPONSE': 'u2f_get_api_version_response'
-    };
-
-
-    /**
-     * Response status codes
-     * @const
-     * @enum {number}
-     */
-    u2f.ErrorCodes = {
-        'OK': 0,
-        'OTHER_ERROR': 1,
-        'BAD_REQUEST': 2,
-        'CONFIGURATION_UNSUPPORTED': 3,
-        'DEVICE_INELIGIBLE': 4,
-        'TIMEOUT': 5
-    };
-
-
-    /**
-     * A message for registration requests
-     * @typedef {{
-     *   type: u2f.MessageTypes,
-     *   appId: ?string,
-     *   timeoutSeconds: ?number,
-     *   requestId: ?number
-     * }}
-     */
-    u2f.U2fRequest;
-
-
-    /**
-     * A message for registration responses
-     * @typedef {{
-     *   type: u2f.MessageTypes,
-     *   responseData: (u2f.Error | u2f.RegisterResponse | u2f.SignResponse),
-     *   requestId: ?number
-     * }}
-     */
-    u2f.U2fResponse;
-
-
-    /**
-     * An error object for responses
-     * @typedef {{
-     *   errorCode: u2f.ErrorCodes,
-     *   errorMessage: ?string
-     * }}
-     */
-    u2f.Error;
-
-    /**
-     * Data object for a single sign request.
-     * @typedef {enum {BLUETOOTH_RADIO, BLUETOOTH_LOW_ENERGY, USB, NFC}}
-     */
-    u2f.Transport;
-
-
-    /**
-     * Data object for a single sign request.
-     * @typedef {Array<u2f.Transport>}
-     */
-    u2f.Transports;
-
-    /**
-     * Data object for a single sign request.
-     * @typedef {{
-     *   version: string,
-     *   challenge: string,
-     *   keyHandle: string,
-     *   appId: string
-     * }}
-     */
-    u2f.SignRequest;
-
-
-    /**
-     * Data object for a sign response.
-     * @typedef {{
-     *   keyHandle: string,
-     *   signatureData: string,
-     *   clientData: string
-     * }}
-     */
-    u2f.SignResponse;
-
-
-    /**
-     * Data object for a registration request.
-     * @typedef {{
-     *   version: string,
-     *   challenge: string
-     * }}
-     */
-    u2f.RegisterRequest;
-
-
-    /**
-     * Data object for a registration response.
-     * @typedef {{
-     *   version: string,
-     *   keyHandle: string,
-     *   transports: Transports,
-     *   appId: string
-     * }}
-     */
-    u2f.RegisterResponse;
-
-
-    /**
-     * Data object for a registered key.
-     * @typedef {{
-     *   version: string,
-     *   keyHandle: string,
-     *   transports: ?Transports,
-     *   appId: ?string
-     * }}
-     */
-    u2f.RegisteredKey;
-
-
-    /**
-     * Data object for a get API register response.
-     * @typedef {{
-     *   js_api_version: number
-     * }}
-     */
-    u2f.GetJsApiVersionResponse;
-
-
-    //Low level MessagePort API support
-
-    /**
-     * Sets up a MessagePort to the U2F extension using the
-     * available mechanisms.
-     * @param {function((MessagePort|u2f.WrappedChromeRuntimePort_))} callback
-     */
-    u2f.getMessagePort = function (callback) {
-        if (typeof chrome != 'undefined' && chrome.runtime) {
-            // The actual message here does not matter, but we need to get a reply
-            // for the callback to run. Thus, send an empty signature request
-            // in order to get a failure response.
-            var msg = {
-                type: u2f.MessageTypes.U2F_SIGN_REQUEST,
-                signRequests: []
-            };
-            chrome.runtime.sendMessage(u2f.EXTENSION_ID, msg, function () {
-                if (!chrome.runtime.lastError) {
-                    // We are on a whitelisted origin and can talk directly
-                    // with the extension.
-                    u2f.getChromeRuntimePort_(callback);
-                } else {
-                    // chrome.runtime was available, but we couldn't message
-                    // the extension directly, use iframe
-                    u2f.getIframePort_(callback);
-                }
-            });
-        } else if (u2f.isAndroidChrome_()) {
-            u2f.getAuthenticatorPort_(callback);
-        } else if (u2f.isIosChrome_()) {
-            u2f.getIosPort_(callback);
-        } else {
-            // chrome.runtime was not available at all, which is normal
-            // when this origin doesn't have access to any extensions.
-            u2f.getIframePort_(callback);
-        }
-    };
-
-    /**
-     * Detect chrome running on android based on the browser's useragent.
-     * @private
-     */
-    u2f.isAndroidChrome_ = function () {
-        var userAgent = navigator.userAgent;
-        return userAgent.indexOf('Chrome') != -1 &&
-            userAgent.indexOf('Android') != -1;
-    };
-
-    /**
-     * Detect chrome running on iOS based on the browser's platform.
-     * @private
-     */
-    u2f.isIosChrome_ = function () {
-        return ["iPhone", "iPad", "iPod"].indexOf(navigator.platform) > -1;
-    };
-
-    /**
-     * Connects directly to the extension via chrome.runtime.connect.
-     * @param {function(u2f.WrappedChromeRuntimePort_)} callback
-     * @private
-     */
-    u2f.getChromeRuntimePort_ = function (callback) {
-        var port = chrome.runtime.connect(u2f.EXTENSION_ID,
-            { 'includeTlsChannelId': true });
-        setTimeout(function () {
-            callback(new u2f.WrappedChromeRuntimePort_(port));
-        }, 0);
-    };
-
-    /**
-     * Return a 'port' abstraction to the Authenticator app.
-     * @param {function(u2f.WrappedAuthenticatorPort_)} callback
-     * @private
-     */
-    u2f.getAuthenticatorPort_ = function (callback) {
-        setTimeout(function () {
-            callback(new u2f.WrappedAuthenticatorPort_());
-        }, 0);
-    };
-
-    /**
-     * Return a 'port' abstraction to the iOS client app.
-     * @param {function(u2f.WrappedIosPort_)} callback
-     * @private
-     */
-    u2f.getIosPort_ = function (callback) {
-        setTimeout(function () {
-            callback(new u2f.WrappedIosPort_());
-        }, 0);
-    };
-
-    /**
-     * A wrapper for chrome.runtime.Port that is compatible with MessagePort.
-     * @param {Port} port
-     * @constructor
-     * @private
-     */
-    u2f.WrappedChromeRuntimePort_ = function (port) {
-        this.port_ = port;
-    };
-
-    /**
-     * Format and return a sign request compliant with the JS API version supported by the extension.
-     * @param {Array<u2f.SignRequest>} signRequests
-     * @param {number} timeoutSeconds
-     * @param {number} reqId
-     * @return {Object}
-     */
-    u2f.formatSignRequest_ =
-        function (appId, challenge, registeredKeys, timeoutSeconds, reqId) {
-            if (js_api_version === undefined || js_api_version < 1.1) {
-                // Adapt request to the 1.0 JS API
-                var signRequests = [];
-                for (var i = 0; i < registeredKeys.length; i++) {
-                    signRequests[i] = {
-                        version: registeredKeys[i].version,
-                        challenge: challenge,
-                        keyHandle: registeredKeys[i].keyHandle,
-                        appId: appId
-                    };
-                }
-                return {
-                    type: u2f.MessageTypes.U2F_SIGN_REQUEST,
-                    signRequests: signRequests,
-                    timeoutSeconds: timeoutSeconds,
-                    requestId: reqId
-                };
-            }
-            // JS 1.1 API
-            return {
-                type: u2f.MessageTypes.U2F_SIGN_REQUEST,
-                appId: appId,
-                challenge: challenge,
-                registeredKeys: registeredKeys,
-                timeoutSeconds: timeoutSeconds,
-                requestId: reqId
-            };
-        };
-
-    /**
-     * Format and return a register request compliant with the JS API version supported by the extension..
-     * @param {Array<u2f.SignRequest>} signRequests
-     * @param {Array<u2f.RegisterRequest>} signRequests
-     * @param {number} timeoutSeconds
-     * @param {number} reqId
-     * @return {Object}
-     */
-    u2f.formatRegisterRequest_ =
-        function (appId, registeredKeys, registerRequests, timeoutSeconds, reqId) {
-            if (js_api_version === undefined || js_api_version < 1.1) {
-                // Adapt request to the 1.0 JS API
-                for (var i = 0; i < registerRequests.length; i++) {
-                    registerRequests[i].appId = appId;
-                }
-                var signRequests = [];
-                for (var i = 0; i < registeredKeys.length; i++) {
-                    signRequests[i] = {
-                        version: registeredKeys[i].version,
-                        challenge: registerRequests[0],
-                        keyHandle: registeredKeys[i].keyHandle,
-                        appId: appId
-                    };
-                }
-                return {
-                    type: u2f.MessageTypes.U2F_REGISTER_REQUEST,
-                    signRequests: signRequests,
-                    registerRequests: registerRequests,
-                    timeoutSeconds: timeoutSeconds,
-                    requestId: reqId
-                };
-            }
-            // JS 1.1 API
-            return {
-                type: u2f.MessageTypes.U2F_REGISTER_REQUEST,
-                appId: appId,
-                registerRequests: registerRequests,
-                registeredKeys: registeredKeys,
-                timeoutSeconds: timeoutSeconds,
-                requestId: reqId
-            };
-        };
-
-
-    /**
-     * Posts a message on the underlying channel.
-     * @param {Object} message
-     */
-    u2f.WrappedChromeRuntimePort_.prototype.postMessage = function (message) {
-        this.port_.postMessage(message);
-    };
-
-
-    /**
-     * Emulates the HTML 5 addEventListener interface. Works only for the
-     * onmessage event, which is hooked up to the chrome.runtime.Port.onMessage.
-     * @param {string} eventName
-     * @param {function({data: Object})} handler
-     */
-    u2f.WrappedChromeRuntimePort_.prototype.addEventListener =
-        function (eventName, handler) {
-            var name = eventName.toLowerCase();
-            if (name == 'message' || name == 'onmessage') {
-                this.port_.onMessage.addListener(function (message) {
-                    // Emulate a minimal MessageEvent object
-                    handler({ 'data': message });
-                });
-            } else {
-                console.error('WrappedChromeRuntimePort only supports onMessage');
-            }
-        };
-
-    /**
-     * Wrap the Authenticator app with a MessagePort interface.
-     * @constructor
-     * @private
-     */
-    u2f.WrappedAuthenticatorPort_ = function () {
-        this.requestId_ = -1;
-        this.requestObject_ = null;
-    }
-
-    /**
-     * Launch the Authenticator intent.
-     * @param {Object} message
-     */
-    u2f.WrappedAuthenticatorPort_.prototype.postMessage = function (message) {
-        var intentUrl =
-            u2f.WrappedAuthenticatorPort_.INTENT_URL_BASE_ +
-            ';S.request=' + encodeURIComponent(JSON.stringify(message)) +
-            ';end';
-        document.location = intentUrl;
-    };
-
-    /**
-     * Tells what type of port this is.
-     * @return {String} port type
-     */
-    u2f.WrappedAuthenticatorPort_.prototype.getPortType = function () {
-        return "WrappedAuthenticatorPort_";
-    };
-
-
-    /**
-     * Emulates the HTML 5 addEventListener interface.
-     * @param {string} eventName
-     * @param {function({data: Object})} handler
-     */
-    u2f.WrappedAuthenticatorPort_.prototype.addEventListener = function (eventName, handler) {
-        var name = eventName.toLowerCase();
-        if (name == 'message') {
-            var self = this;
-            /* Register a callback to that executes when
-             * chrome injects the response. */
-            window.addEventListener(
-                'message', self.onRequestUpdate_.bind(self, handler), false);
-        } else {
-            console.error('WrappedAuthenticatorPort only supports message');
-        }
-    };
-
-    /**
-     * Callback invoked  when a response is received from the Authenticator.
-     * @param function({data: Object}) callback
-     * @param {Object} message message Object
-     */
-    u2f.WrappedAuthenticatorPort_.prototype.onRequestUpdate_ =
-        function (callback, message) {
-            var messageObject = JSON.parse(message.data);
-            var intentUrl = messageObject['intentURL'];
-
-            var errorCode = messageObject['errorCode'];
-            var responseObject = null;
-            if (messageObject.hasOwnProperty('data')) {
-                responseObject = /** @type {Object} */ (
-                    JSON.parse(messageObject['data']));
-            }
-
-            callback({ 'data': responseObject });
-        };
-
-    /**
-     * Base URL for intents to Authenticator.
-     * @const
-     * @private
-     */
-    u2f.WrappedAuthenticatorPort_.INTENT_URL_BASE_ =
-        'intent:#Intent;action=com.google.android.apps.authenticator.AUTHENTICATE';
-
-    /**
-     * Wrap the iOS client app with a MessagePort interface.
-     * @constructor
-     * @private
-     */
-    u2f.WrappedIosPort_ = function () { };
-
-    /**
-     * Launch the iOS client app request
-     * @param {Object} message
-     */
-    u2f.WrappedIosPort_.prototype.postMessage = function (message) {
-        var str = JSON.stringify(message);
-        var url = "u2f://auth?" + encodeURI(str);
-        location.replace(url);
-    };
-
-    /**
-     * Tells what type of port this is.
-     * @return {String} port type
-     */
-    u2f.WrappedIosPort_.prototype.getPortType = function () {
-        return "WrappedIosPort_";
-    };
-
-    /**
-     * Emulates the HTML 5 addEventListener interface.
-     * @param {string} eventName
-     * @param {function({data: Object})} handler
-     */
-    u2f.WrappedIosPort_.prototype.addEventListener = function (eventName, handler) {
-        var name = eventName.toLowerCase();
-        if (name !== 'message') {
-            console.error('WrappedIosPort only supports message');
-        }
-    };
-
-    /**
-     * Sets up an embedded trampoline iframe, sourced from the extension.
-     * @param {function(MessagePort)} callback
-     * @private
-     */
-    u2f.getIframePort_ = function (callback) {
-        // Create the iframe
-        var iframeOrigin = 'chrome-extension://' + u2f.EXTENSION_ID;
-        var iframe = document.createElement('iframe');
-        iframe.src = iframeOrigin + '/u2f-comms.html';
-        iframe.setAttribute('style', 'display:none');
-        document.body.appendChild(iframe);
-
-        var channel = new MessageChannel();
-        var ready = function (message) {
-            if (message.data == 'ready') {
-                channel.port1.removeEventListener('message', ready);
-                callback(channel.port1);
-            } else {
-                console.error('First event on iframe port was not "ready"');
-            }
-        };
-        channel.port1.addEventListener('message', ready);
-        channel.port1.start();
-
-        iframe.addEventListener('load', function () {
-            // Deliver the port to the iframe and initialize
-            iframe.contentWindow.postMessage('init', iframeOrigin, [channel.port2]);
-        });
-    };
-
-
-    //High-level JS API
-
-    /**
-     * Default extension response timeout in seconds.
-     * @const
-     */
-    u2f.EXTENSION_TIMEOUT_SEC = 30;
-
-    /**
-     * A singleton instance for a MessagePort to the extension.
-     * @type {MessagePort|u2f.WrappedChromeRuntimePort_}
-     * @private
-     */
-    u2f.port_ = null;
-
-    /**
-     * Callbacks waiting for a port
-     * @type {Array<function((MessagePort|u2f.WrappedChromeRuntimePort_))>}
-     * @private
-     */
-    u2f.waitingForPort_ = [];
-
-    /**
-     * A counter for requestIds.
-     * @type {number}
-     * @private
-     */
-    u2f.reqCounter_ = 0;
-
-    /**
-     * A map from requestIds to client callbacks
-     * @type {Object.<number,(function((u2f.Error|u2f.RegisterResponse))
-     *                       |function((u2f.Error|u2f.SignResponse)))>}
-     * @private
-     */
-    u2f.callbackMap_ = {};
-
-    /**
-     * Creates or retrieves the MessagePort singleton to use.
-     * @param {function((MessagePort|u2f.WrappedChromeRuntimePort_))} callback
-     * @private
-     */
-    u2f.getPortSingleton_ = function (callback) {
-        if (u2f.port_) {
-            callback(u2f.port_);
-        } else {
-            if (u2f.waitingForPort_.length == 0) {
-                u2f.getMessagePort(function (port) {
-                    u2f.port_ = port;
-                    u2f.port_.addEventListener('message',
-            /** @type {function(Event)} */(u2f.responseHandler_));
-
-                    // Careful, here be async callbacks. Maybe.
-                    while (u2f.waitingForPort_.length)
-                        u2f.waitingForPort_.shift()(u2f.port_);
-                });
-            }
-            u2f.waitingForPort_.push(callback);
-        }
-    };
-
-    /**
-     * Handles response messages from the extension.
-     * @param {MessageEvent.<u2f.Response>} message
-     * @private
-     */
-    u2f.responseHandler_ = function (message) {
-        var response = message.data;
-        var reqId = response['requestId'];
-        if (!reqId || !u2f.callbackMap_[reqId]) {
-            console.error('Unknown or missing requestId in response.');
-            return;
-        }
-        var cb = u2f.callbackMap_[reqId];
-        delete u2f.callbackMap_[reqId];
-        cb(response['responseData']);
-    };
-
-    /**
-     * Dispatches an array of sign requests to available U2F tokens.
-     * If the JS API version supported by the extension is unknown, it first sends a
-     * message to the extension to find out the supported API version and then it sends
-     * the sign request.
-     * @param {string=} appId
-     * @param {string=} challenge
-     * @param {Array<u2f.RegisteredKey>} registeredKeys
-     * @param {function((u2f.Error|u2f.SignResponse))} callback
-     * @param {number=} opt_timeoutSeconds
-     */
-    u2f.sign = function (appId, challenge, registeredKeys, callback, opt_timeoutSeconds) {
-        if (js_api_version === undefined) {
-            // Send a message to get the extension to JS API version, then send the actual sign request.
-            u2f.getApiVersion(
-                function (response) {
-                    js_api_version = response['js_api_version'] === undefined ? 0 : response['js_api_version'];
-                    console.log("Extension JS API Version: ", js_api_version);
-                    u2f.sendSignRequest(appId, challenge, registeredKeys, callback, opt_timeoutSeconds);
-                });
-        } else {
-            // We know the JS API version. Send the actual sign request in the supported API version.
-            u2f.sendSignRequest(appId, challenge, registeredKeys, callback, opt_timeoutSeconds);
-        }
-    };
-
-    /**
-     * Dispatches an array of sign requests to available U2F tokens.
-     * @param {string=} appId
-     * @param {string=} challenge
-     * @param {Array<u2f.RegisteredKey>} registeredKeys
-     * @param {function((u2f.Error|u2f.SignResponse))} callback
-     * @param {number=} opt_timeoutSeconds
-     */
-    u2f.sendSignRequest = function (appId, challenge, registeredKeys, callback, opt_timeoutSeconds) {
-        u2f.getPortSingleton_(function (port) {
-            var reqId = ++u2f.reqCounter_;
-            u2f.callbackMap_[reqId] = callback;
-            var timeoutSeconds = (typeof opt_timeoutSeconds !== 'undefined' ?
-                opt_timeoutSeconds : u2f.EXTENSION_TIMEOUT_SEC);
-            var req = u2f.formatSignRequest_(appId, challenge, registeredKeys, timeoutSeconds, reqId);
-            port.postMessage(req);
-        });
-    };
-
-    /**
-     * Dispatches register requests to available U2F tokens. An array of sign
-     * requests identifies already registered tokens.
-     * If the JS API version supported by the extension is unknown, it first sends a
-     * message to the extension to find out the supported API version and then it sends
-     * the register request.
-     * @param {string=} appId
-     * @param {Array<u2f.RegisterRequest>} registerRequests
-     * @param {Array<u2f.RegisteredKey>} registeredKeys
-     * @param {function((u2f.Error|u2f.RegisterResponse))} callback
-     * @param {number=} opt_timeoutSeconds
-     */
-    u2f.register = function (appId, registerRequests, registeredKeys, callback, opt_timeoutSeconds) {
-        if (js_api_version === undefined) {
-            // Send a message to get the extension to JS API version, then send the actual register request.
-            u2f.getApiVersion(
-                function (response) {
-                    js_api_version = response['js_api_version'] === undefined ? 0 : response['js_api_version'];
-                    console.log("Extension JS API Version: ", js_api_version);
-                    u2f.sendRegisterRequest(appId, registerRequests, registeredKeys,
-                        callback, opt_timeoutSeconds);
-                });
-        } else {
-            // We know the JS API version. Send the actual register request in the supported API version.
-            u2f.sendRegisterRequest(appId, registerRequests, registeredKeys,
-                callback, opt_timeoutSeconds);
-        }
-    };
-
-    /**
-     * Dispatches register requests to available U2F tokens. An array of sign
-     * requests identifies already registered tokens.
-     * @param {string=} appId
-     * @param {Array<u2f.RegisterRequest>} registerRequests
-     * @param {Array<u2f.RegisteredKey>} registeredKeys
-     * @param {function((u2f.Error|u2f.RegisterResponse))} callback
-     * @param {number=} opt_timeoutSeconds
-     */
-    u2f.sendRegisterRequest = function (appId, registerRequests, registeredKeys, callback, opt_timeoutSeconds) {
-        u2f.getPortSingleton_(function (port) {
-            var reqId = ++u2f.reqCounter_;
-            u2f.callbackMap_[reqId] = callback;
-            var timeoutSeconds = (typeof opt_timeoutSeconds !== 'undefined' ?
-                opt_timeoutSeconds : u2f.EXTENSION_TIMEOUT_SEC);
-            var req = u2f.formatRegisterRequest_(
-                appId, registeredKeys, registerRequests, timeoutSeconds, reqId);
-            port.postMessage(req);
-        });
-    };
-
-
-    /**
-     * Dispatches a message to the extension to find out the supported
-     * JS API version.
-     * If the user is on a mobile phone and is thus using Google Authenticator instead
-     * of the Chrome extension, don't send the request and simply return 0.
-     * @param {function((u2f.Error|u2f.GetJsApiVersionResponse))} callback
-     * @param {number=} opt_timeoutSeconds
-     */
-    u2f.getApiVersion = function (callback, opt_timeoutSeconds) {
-        u2f.getPortSingleton_(function (port) {
-            // If we are using Android Google Authenticator or iOS client app,
-            // do not fire an intent to ask which JS API version to use.
-            if (port.getPortType) {
-                var apiVersion;
-                switch (port.getPortType()) {
-                    case 'WrappedIosPort_':
-                    case 'WrappedAuthenticatorPort_':
-                        apiVersion = 1.1;
-                        break;
-
-                    default:
-                        apiVersion = 0;
-                        break;
-                }
-                callback({ 'js_api_version': apiVersion });
-                return;
-            }
-            var reqId = ++u2f.reqCounter_;
-            u2f.callbackMap_[reqId] = callback;
-            var req = {
-                type: u2f.MessageTypes.U2F_GET_API_VERSION_REQUEST,
-                timeoutSeconds: (typeof opt_timeoutSeconds !== 'undefined' ?
-                    opt_timeoutSeconds : u2f.EXTENSION_TIMEOUT_SEC),
-                requestId: reqId
-            };
-            port.postMessage(req);
-        });
-    };
-
-    /**
-     * Modification:
-     * Assign u2f back to window (root) scope.
-     */
-    root.u2f = u2f;
-}(this));