513 lines
24 KiB
JavaScript
513 lines
24 KiB
JavaScript
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// Converse.js (A browser based XMPP chat client)
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// http://conversejs.org
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//
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// Copyright (c) 2012-2016, Jan-Carel Brand <jc@opkode.com>
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// Licensed under the Mozilla Public License (MPLv2)
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//
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/*global converse, utils, Backbone, define, window, setTimeout,
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crypto, CryptoJS, otr */
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/* This is a Converse.js plugin which add support Off-the-record (OTR)
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* encryption of one-on-one chat messages.
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*/
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(function (root, factory) {
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if (typeof define === 'function' && define.amd) {
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// AMD module loading
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define("converse-otr", ["otr", "converse-core", "utils"], factory);
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} else {
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// When not using a module loader
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// -------------------------------
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// In this case, the dependencies need to be available already as
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// global variables, and should be loaded separately via *script* tags.
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// See the file **non_amd.html** for an example of this usecase.
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root.converse = factory(otr, converse, utils);
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}
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}(this, function (otr, converse_api, utils) {
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// Strophe methods for building stanzas
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var Strophe = converse_api.env.Strophe,
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b64_sha1 = converse_api.env.b64_sha1;
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// Other necessary globals
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var $ = converse_api.env.jQuery,
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_ = converse_api.env._;
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// Translation machinery
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// ---------------------
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var __ = utils.__.bind(this);
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var HAS_CSPRNG = ((typeof crypto !== 'undefined') &&
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((typeof crypto.randomBytes === 'function') ||
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(typeof crypto.getRandomValues === 'function')
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));
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var HAS_CRYPTO = HAS_CSPRNG && (
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(typeof CryptoJS !== "undefined") &&
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(typeof otr.OTR !== "undefined") &&
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(typeof otr.DSA !== "undefined")
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);
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var UNENCRYPTED = 0;
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var UNVERIFIED= 1;
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var VERIFIED= 2;
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var FINISHED = 3;
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// Translation aware constants
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// ---------------------------
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var OTR_CLASS_MAPPING = {};
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OTR_CLASS_MAPPING[UNENCRYPTED] = 'unencrypted';
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OTR_CLASS_MAPPING[UNVERIFIED] = 'unverified';
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OTR_CLASS_MAPPING[VERIFIED] = 'verified';
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OTR_CLASS_MAPPING[FINISHED] = 'finished';
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var OTR_TRANSLATED_MAPPING = {};
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OTR_TRANSLATED_MAPPING[UNENCRYPTED] = __('unencrypted');
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OTR_TRANSLATED_MAPPING[UNVERIFIED] = __('unverified');
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OTR_TRANSLATED_MAPPING[VERIFIED] = __('verified');
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OTR_TRANSLATED_MAPPING[FINISHED] = __('finished');
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converse_api.plugins.add('otr', {
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overrides: {
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// Overrides mentioned here will be picked up by converse.js's
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// plugin architecture they will replace existing methods on the
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// relevant objects or classes.
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//
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// New functions which don't exist yet can also be added.
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_initialize: function () {
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this._super._initialize.apply(this, arguments);
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this._super.converse.otr = new this._super.converse.OTR();
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},
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registerGlobalEventHandlers: function () {
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this._super.registerGlobalEventHandlers();
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$(document).click(function () {
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if ($('.toggle-otr ul').is(':visible')) {
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$('.toggle-otr ul', this).slideUp();
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}
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if ($('.toggle-smiley ul').is(':visible')) {
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$('.toggle-smiley ul', this).slideUp();
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}
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});
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},
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wrappedChatBox: function (chatbox) {
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var wrapped_chatbox = this._super.wrappedChatBox.apply(this, arguments);
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if (!chatbox) { return; }
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return _.extend(wrapped_chatbox, {
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'endOTR': chatbox.endOTR.bind(chatbox),
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'initiateOTR': chatbox.initiateOTR.bind(chatbox),
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});
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},
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ChatBox: {
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initialize: function () {
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this._super.initialize.apply(this, arguments);
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if (this.get('box_id') !== 'controlbox') {
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this.save({
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'otr_status': this.get('otr_status') || UNENCRYPTED
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});
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}
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},
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createMessage: function ($message, $delay, archive_id) {
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var $body = $message.children('body');
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var text = ($body.length > 0 ? $body.text() : undefined);
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if ((!text) || (!converse.allow_otr)) {
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return this._super.createMessage.apply(this, arguments);
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}
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if (text.match(/^\?OTRv23?/)) {
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this.initiateOTR(text);
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} else {
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if (_.contains([UNVERIFIED, VERIFIED], this.get('otr_status'))) {
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this.otr.receiveMsg(text);
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} else {
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if (text.match(/^\?OTR/)) {
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if (!this.otr) {
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this.initiateOTR(text);
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} else {
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this.otr.receiveMsg(text);
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}
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} else {
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// Normal unencrypted message.
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return this._super.createMessage.apply(this, arguments);
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}
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}
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}
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},
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getSession: function (callback) {
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var cipher = CryptoJS.lib.PasswordBasedCipher;
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var pass, instance_tag, saved_key, pass_check;
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if (converse.cache_otr_key) {
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pass = converse.otr.getSessionPassphrase();
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if (typeof pass !== "undefined") {
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instance_tag = window.sessionStorage[b64_sha1(this.id+'instance_tag')];
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saved_key = window.sessionStorage[b64_sha1(this.id+'priv_key')];
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pass_check = window.sessionStorage[b64_sha1(this.connection.jid+'pass_check')];
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if (saved_key && instance_tag && typeof pass_check !== 'undefined') {
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var decrypted = cipher.decrypt(CryptoJS.algo.AES, saved_key, pass);
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var key = otr.DSA.parsePrivate(decrypted.toString(CryptoJS.enc.Latin1));
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if (cipher.decrypt(CryptoJS.algo.AES, pass_check, pass).toString(CryptoJS.enc.Latin1) === 'match') {
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// Verified that the passphrase is still the same
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this.trigger('showHelpMessages', [__('Re-establishing encrypted session')]);
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callback({
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'key': key,
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'instance_tag': instance_tag
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});
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return; // Our work is done here
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}
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}
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}
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}
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// We need to generate a new key and instance tag
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this.trigger('showHelpMessages', [
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__('Generating private key.'),
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__('Your browser might become unresponsive.')],
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null,
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true // show spinner
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);
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setTimeout(function () {
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var instance_tag = otr.OTR.makeInstanceTag();
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callback({
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'key': converse.otr.generatePrivateKey.call(this, instance_tag),
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'instance_tag': instance_tag
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});
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}, 500);
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},
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updateOTRStatus: function (state) {
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switch (state) {
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case otr.OTR.CONST.STATUS_AKE_SUCCESS:
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if (this.otr.msgstate === otr.OTR.CONST.MSGSTATE_ENCRYPTED) {
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this.save({'otr_status': UNVERIFIED});
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}
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break;
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case otr.OTR.CONST.STATUS_END_OTR:
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if (this.otr.msgstate === otr.OTR.CONST.MSGSTATE_FINISHED) {
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this.save({'otr_status': FINISHED});
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} else if (this.otr.msgstate === otr.OTR.CONST.MSGSTATE_PLAINTEXT) {
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this.save({'otr_status': UNENCRYPTED});
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}
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break;
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}
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},
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onSMP: function (type, data) {
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// Event handler for SMP (Socialist's Millionaire Protocol)
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// used by OTR (off-the-record).
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switch (type) {
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case 'question':
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this.otr.smpSecret(prompt(__(
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'Authentication request from %1$s\n\nYour chat contact is attempting to verify your identity, by asking you the question below.\n\n%2$s',
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[this.get('fullname'), data])));
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break;
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case 'trust':
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if (data === true) {
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this.save({'otr_status': VERIFIED});
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} else {
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this.trigger(
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'showHelpMessages',
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[__("Could not verify this user's identify.")],
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'error');
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this.save({'otr_status': UNVERIFIED});
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}
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break;
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default:
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throw new TypeError('ChatBox.onSMP: Unknown type for SMP');
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}
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},
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initiateOTR: function (query_msg) {
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// Sets up an OTR object through which we can send and receive
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// encrypted messages.
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//
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// If 'query_msg' is passed in, it means there is an alread incoming
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// query message from our contact. Otherwise, it is us who will
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// send the query message to them.
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this.save({'otr_status': UNENCRYPTED});
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this.getSession(function (session) {
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this.otr = new otr.OTR({
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fragment_size: 140,
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send_interval: 200,
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priv: session.key,
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instance_tag: session.instance_tag,
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debug: this.debug
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});
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this.otr.on('status', this.updateOTRStatus.bind(this));
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this.otr.on('smp', this.onSMP.bind(this));
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this.otr.on('ui', function (msg) {
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this.trigger('showReceivedOTRMessage', msg);
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}.bind(this));
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this.otr.on('io', function (msg) {
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this.trigger('sendMessage', new converse.Message({ message: msg }));
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}.bind(this));
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this.otr.on('error', function (msg) {
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this.trigger('showOTRError', msg);
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}.bind(this));
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this.trigger('showHelpMessages', [__('Exchanging private key with contact.')]);
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if (query_msg) {
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this.otr.receiveMsg(query_msg);
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} else {
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this.otr.sendQueryMsg();
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}
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}.bind(this));
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},
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endOTR: function () {
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if (this.otr) {
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this.otr.endOtr();
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}
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this.save({'otr_status': UNENCRYPTED});
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}
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},
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ChatBoxView: {
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events: {
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'click .toggle-otr': 'toggleOTRMenu',
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'click .start-otr': 'startOTRFromToolbar',
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'click .end-otr': 'endOTR',
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'click .auth-otr': 'authOTR'
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},
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initialize: function () {
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this._super.initialize.apply(this, arguments);
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this.model.on('change:otr_status', this.onOTRStatusChanged, this);
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this.model.on('showOTRError', this.showOTRError, this);
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this.model.on('showSentOTRMessage', function (text) {
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this.showMessage({'message': text, 'sender': 'me'});
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}, this);
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this.model.on('showReceivedOTRMessage', function (text) {
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this.showMessage({'message': text, 'sender': 'them'});
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}, this);
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if ((_.contains([UNVERIFIED, VERIFIED], this.model.get('otr_status'))) || converse.use_otr_by_default) {
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this.model.initiateOTR();
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}
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},
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createMessageStanza: function () {
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var stanza = this._super.createMessageStanza.apply(this, arguments);
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if (this.model.get('otr_status') !== UNENCRYPTED) {
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// OTR messages aren't carbon copied
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stanza.c('private', {'xmlns': Strophe.NS.CARBONS});
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}
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return stanza;
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},
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onMessageSubmitted: function (text) {
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if (!converse.connection.authenticated) {
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return this.showHelpMessages(
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['Sorry, the connection has been lost, '+
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'and your message could not be sent'],
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'error'
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);
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}
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var match = text.replace(/^\s*/, "").match(/^\/(.*)\s*$/);
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if (match) {
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if ((converse.allow_otr) && (match[1] === "endotr")) {
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return this.endOTR();
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} else if ((converse.allow_otr) && (match[1] === "otr")) {
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return this.model.initiateOTR();
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}
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}
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if (_.contains([UNVERIFIED, VERIFIED], this.model.get('otr_status'))) {
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// Off-the-record encryption is active
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this.model.otr.sendMsg(text);
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this.model.trigger('showSentOTRMessage', text);
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} else {
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this._super.onMessageSubmitted.apply(this, arguments);
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}
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},
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onOTRStatusChanged: function () {
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this.renderToolbar().informOTRChange();
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},
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informOTRChange: function () {
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var data = this.model.toJSON();
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var msgs = [];
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if (data.otr_status === UNENCRYPTED) {
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msgs.push(__("Your messages are not encrypted anymore"));
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} else if (data.otr_status === UNVERIFIED) {
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msgs.push(__("Your messages are now encrypted but your contact's identity has not been verified."));
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} else if (data.otr_status === VERIFIED) {
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msgs.push(__("Your contact's identify has been verified."));
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} else if (data.otr_status === FINISHED) {
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msgs.push(__("Your contact has ended encryption on their end, you should do the same."));
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}
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return this.showHelpMessages(msgs, 'info', false);
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},
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showOTRError: function (msg) {
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if (msg === 'Message cannot be sent at this time.') {
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this.showHelpMessages(
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[__('Your message could not be sent')], 'error');
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} else if (msg === 'Received an unencrypted message.') {
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this.showHelpMessages(
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[__('We received an unencrypted message')], 'error');
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} else if (msg === 'Received an unreadable encrypted message.') {
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this.showHelpMessages(
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[__('We received an unreadable encrypted message')],
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'error');
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} else {
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this.showHelpMessages(['Encryption error occured: '+msg], 'error');
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}
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||
|
|
converse.log("OTR ERROR:"+msg);
|
||
|
|
},
|
||
|
|
|
||
|
|
startOTRFromToolbar: function (ev) {
|
||
|
|
$(ev.target).parent().parent().slideUp();
|
||
|
|
ev.stopPropagation();
|
||
|
|
this.model.initiateOTR();
|
||
|
|
},
|
||
|
|
|
||
|
|
endOTR: function (ev) {
|
||
|
|
if (typeof ev !== "undefined") {
|
||
|
|
ev.preventDefault();
|
||
|
|
ev.stopPropagation();
|
||
|
|
}
|
||
|
|
this.model.endOTR();
|
||
|
|
},
|
||
|
|
|
||
|
|
authOTR: function (ev) {
|
||
|
|
var scheme = $(ev.target).data().scheme;
|
||
|
|
var result, question, answer;
|
||
|
|
if (scheme === 'fingerprint') {
|
||
|
|
result = confirm(__('Here are the fingerprints, please confirm them with %1$s, outside of this chat.\n\nFingerprint for you, %2$s: %3$s\n\nFingerprint for %1$s: %4$s\n\nIf you have confirmed that the fingerprints match, click OK, otherwise click Cancel.', [
|
||
|
|
this.model.get('fullname'),
|
||
|
|
converse.xmppstatus.get('fullname')||converse.bare_jid,
|
||
|
|
this.model.otr.priv.fingerprint(),
|
||
|
|
this.model.otr.their_priv_pk.fingerprint()
|
||
|
|
]
|
||
|
|
));
|
||
|
|
if (result === true) {
|
||
|
|
this.model.save({'otr_status': VERIFIED});
|
||
|
|
} else {
|
||
|
|
this.model.save({'otr_status': UNVERIFIED});
|
||
|
|
}
|
||
|
|
} else if (scheme === 'smp') {
|
||
|
|
alert(__('You will be prompted to provide a security question and then an answer to that question.\n\nYour contact will then be prompted the same question and if they type the exact same answer (case sensitive), their identity will be verified.'));
|
||
|
|
question = prompt(__('What is your security question?'));
|
||
|
|
if (question) {
|
||
|
|
answer = prompt(__('What is the answer to the security question?'));
|
||
|
|
this.model.otr.smpSecret(answer, question);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
this.showHelpMessages([__('Invalid authentication scheme provided')], 'error');
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
toggleOTRMenu: function (ev) {
|
||
|
|
ev.stopPropagation();
|
||
|
|
this.$el.find('.toggle-otr ul').slideToggle(200);
|
||
|
|
},
|
||
|
|
|
||
|
|
getOTRTooltip: function () {
|
||
|
|
var data = this.model.toJSON();
|
||
|
|
if (data.otr_status === UNENCRYPTED) {
|
||
|
|
return __('Your messages are not encrypted. Click here to enable OTR encryption.');
|
||
|
|
} else if (data.otr_status === UNVERIFIED) {
|
||
|
|
return __('Your messages are encrypted, but your contact has not been verified.');
|
||
|
|
} else if (data.otr_status === VERIFIED) {
|
||
|
|
return __('Your messages are encrypted and your contact verified.');
|
||
|
|
} else if (data.otr_status === FINISHED) {
|
||
|
|
return __('Your contact has closed their end of the private session, you should do the same');
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
renderToolbar: function (options) {
|
||
|
|
if (!converse.show_toolbar) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var data = this.model.toJSON();
|
||
|
|
options = _.extend(options || {}, {
|
||
|
|
FINISHED: FINISHED,
|
||
|
|
UNENCRYPTED: UNENCRYPTED,
|
||
|
|
UNVERIFIED: UNVERIFIED,
|
||
|
|
VERIFIED: VERIFIED,
|
||
|
|
// Leaky abstraction
|
||
|
|
allow_otr: converse.allow_otr && !this.is_chatroom,
|
||
|
|
label_end_encrypted_conversation: __('End encrypted conversation'),
|
||
|
|
label_refresh_encrypted_conversation: __('Refresh encrypted conversation'),
|
||
|
|
label_start_encrypted_conversation: __('Start encrypted conversation'),
|
||
|
|
label_verify_with_fingerprints: __('Verify with fingerprints'),
|
||
|
|
label_verify_with_smp: __('Verify with SMP'),
|
||
|
|
label_whats_this: __("What\'s this?"),
|
||
|
|
otr_status_class: OTR_CLASS_MAPPING[data.otr_status],
|
||
|
|
otr_tooltip: this.getOTRTooltip(),
|
||
|
|
otr_translated_status: OTR_TRANSLATED_MAPPING[data.otr_status],
|
||
|
|
});
|
||
|
|
this._super.renderToolbar.call(this, options);
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
MinimizedChatBoxView: {
|
||
|
|
initialize: function () {
|
||
|
|
this._super.initialize.apply(this, arguments);
|
||
|
|
this.model.on('showReceivedOTRMessage', this.updateUnreadMessagesCounter, this);
|
||
|
|
this.model.on('showSentOTRMessage', this.updateUnreadMessagesCounter, this);
|
||
|
|
},
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
initialize: function () {
|
||
|
|
/* The initialize function gets called as soon as the plugin is
|
||
|
|
* loaded by converse.js's plugin machinery.
|
||
|
|
*/
|
||
|
|
var converse = this.converse;
|
||
|
|
// Configuration values for this plugin
|
||
|
|
var settings = {
|
||
|
|
allow_otr: true,
|
||
|
|
cache_otr_key: false,
|
||
|
|
use_otr_by_default: false
|
||
|
|
};
|
||
|
|
_.extend(converse, settings);
|
||
|
|
_.extend(converse, _.pick(converse.user_settings, Object.keys(settings)));
|
||
|
|
|
||
|
|
// Only allow OTR if we have the capability
|
||
|
|
converse.allow_otr = converse.allow_otr && HAS_CRYPTO;
|
||
|
|
// Only use OTR by default if allow OTR is enabled to begin with
|
||
|
|
converse.use_otr_by_default = converse.use_otr_by_default && converse.allow_otr;
|
||
|
|
|
||
|
|
// Backbone Models and Views
|
||
|
|
// -------------------------
|
||
|
|
converse.OTR = Backbone.Model.extend({
|
||
|
|
// A model for managing OTR settings.
|
||
|
|
getSessionPassphrase: function () {
|
||
|
|
if (converse.authentication === 'prebind') {
|
||
|
|
var key = b64_sha1(converse.connection.jid),
|
||
|
|
pass = window.sessionStorage[key];
|
||
|
|
if (typeof pass === 'undefined') {
|
||
|
|
pass = Math.floor(Math.random()*4294967295).toString();
|
||
|
|
window.sessionStorage[key] = pass;
|
||
|
|
}
|
||
|
|
return pass;
|
||
|
|
} else {
|
||
|
|
return converse.connection.pass;
|
||
|
|
}
|
||
|
|
},
|
||
|
|
|
||
|
|
generatePrivateKey: function (instance_tag) {
|
||
|
|
var key = new otr.DSA();
|
||
|
|
var jid = converse.connection.jid;
|
||
|
|
if (converse.cache_otr_key) {
|
||
|
|
var cipher = CryptoJS.lib.PasswordBasedCipher;
|
||
|
|
var pass = this.getSessionPassphrase();
|
||
|
|
if (typeof pass !== "undefined") {
|
||
|
|
// Encrypt the key and set in sessionStorage. Also store instance tag.
|
||
|
|
window.sessionStorage[b64_sha1(jid+'priv_key')] =
|
||
|
|
cipher.encrypt(CryptoJS.algo.AES, key.packPrivate(), pass).toString();
|
||
|
|
window.sessionStorage[b64_sha1(jid+'instance_tag')] = instance_tag;
|
||
|
|
window.sessionStorage[b64_sha1(jid+'pass_check')] =
|
||
|
|
cipher.encrypt(CryptoJS.algo.AES, 'match', pass).toString();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return key;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}));
|