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