15c10376b0
To conform with naming conventions regarding functions, which the templates are.
867 lines
33 KiB
JavaScript
867 lines
33 KiB
JavaScript
/* global libsignal */
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import concat from 'lodash-es/concat';
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import difference from 'lodash-es/difference';
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import log from '@converse/headless/log';
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import tplAudio from 'templates/audio.js';
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import tplFile from 'templates/file.js';
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import tplImage from 'templates/image.js';
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import tplVideo from 'templates/video.js';
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import { KEY_ALGO, UNTRUSTED, TAG_LENGTH } from './consts.js';
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import { MIMETYPES_MAP } from 'utils/file.js';
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import { __ } from 'i18n';
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import { _converse, converse, api } from '@converse/headless/core';
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import { html } from 'lit';
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import { initStorage } from '@converse/headless/utils/storage.js';
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import { isError } from '@converse/headless/utils/core.js';
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import { isAudioURL, isImageURL, isVideoURL, getURI } from '@converse/headless/utils/url.js';
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import { until } from 'lit/directives/until.js';
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import {
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appendArrayBuffer,
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arrayBufferToBase64,
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arrayBufferToHex,
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arrayBufferToString,
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base64ToArrayBuffer,
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hexToArrayBuffer,
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stringToArrayBuffer
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} from '@converse/headless/utils/arraybuffer.js';
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const { Strophe, URI, sizzle, u } = converse.env;
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export function formatFingerprint (fp) {
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fp = fp.replace(/^05/, '');
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for (let i=1; i<8; i++) {
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const idx = i*8+i-1;
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fp = fp.slice(0, idx) + ' ' + fp.slice(idx);
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}
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return fp;
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}
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export function handleMessageSendError (e, chat) {
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if (e.name === 'IQError') {
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chat.save('omemo_supported', false);
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const err_msgs = [];
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if (sizzle(`presence-subscription-required[xmlns="${Strophe.NS.PUBSUB_ERROR}"]`, e.iq).length) {
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err_msgs.push(
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__(
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"Sorry, we're unable to send an encrypted message because %1$s " +
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'requires you to be subscribed to their presence in order to see their OMEMO information',
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e.iq.getAttribute('from')
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)
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);
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} else if (sizzle(`remote-server-not-found[xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"]`, e.iq).length) {
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err_msgs.push(
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__(
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"Sorry, we're unable to send an encrypted message because the remote server for %1$s could not be found",
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e.iq.getAttribute('from')
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)
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);
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} else {
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err_msgs.push(__('Unable to send an encrypted message due to an unexpected error.'));
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err_msgs.push(e.iq.outerHTML);
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}
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api.alert('error', __('Error'), err_msgs);
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} else if (e.user_facing) {
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api.alert('error', __('Error'), [e.message]);
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}
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throw e;
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}
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export function getOutgoingMessageAttributes (chat, attrs) {
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if (chat.get('omemo_active') && attrs.body) {
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attrs['is_encrypted'] = true;
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attrs['plaintext'] = attrs.body;
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attrs['body'] = __(
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'This is an OMEMO encrypted message which your client doesn’t seem to support. ' +
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'Find more information on https://conversations.im/omemo'
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);
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}
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return attrs;
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}
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async function encryptMessage (plaintext) {
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// The client MUST use fresh, randomly generated key/IV pairs
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// with AES-128 in Galois/Counter Mode (GCM).
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// For GCM a 12 byte IV is strongly suggested as other IV lengths
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// will require additional calculations. In principle any IV size
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// can be used as long as the IV doesn't ever repeat. NIST however
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// suggests that only an IV size of 12 bytes needs to be supported
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// by implementations.
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//
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// https://crypto.stackexchange.com/questions/26783/ciphertext-and-tag-size-and-iv-transmission-with-aes-in-gcm-mode
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const iv = crypto.getRandomValues(new window.Uint8Array(12));
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const key = await crypto.subtle.generateKey(KEY_ALGO, true, ['encrypt', 'decrypt']);
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const algo = {
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'name': 'AES-GCM',
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'iv': iv,
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'tagLength': TAG_LENGTH
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};
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const encrypted = await crypto.subtle.encrypt(algo, key, stringToArrayBuffer(plaintext));
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const length = encrypted.byteLength - ((128 + 7) >> 3);
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const ciphertext = encrypted.slice(0, length);
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const tag = encrypted.slice(length);
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const exported_key = await crypto.subtle.exportKey('raw', key);
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return {
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'key': exported_key,
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'tag': tag,
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'key_and_tag': appendArrayBuffer(exported_key, tag),
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'payload': arrayBufferToBase64(ciphertext),
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'iv': arrayBufferToBase64(iv)
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};
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}
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async function decryptMessage (obj) {
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const key_obj = await crypto.subtle.importKey('raw', obj.key, KEY_ALGO, true, ['encrypt', 'decrypt']);
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const cipher = appendArrayBuffer(base64ToArrayBuffer(obj.payload), obj.tag);
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const algo = {
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'name': 'AES-GCM',
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'iv': base64ToArrayBuffer(obj.iv),
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'tagLength': TAG_LENGTH
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};
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return arrayBufferToString(await crypto.subtle.decrypt(algo, key_obj, cipher));
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}
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export async function encryptFile (file) {
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const iv = crypto.getRandomValues(new Uint8Array(12));
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const key = await crypto.subtle.generateKey({ name: 'AES-GCM', length: 256, }, true, ['encrypt', 'decrypt']);
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const encrypted = await crypto.subtle.encrypt({ name: 'AES-GCM', iv, }, key, await file.arrayBuffer());
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const exported_key = await window.crypto.subtle.exportKey('raw', key);
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const encrypted_file = new File([encrypted], file.name, { type: file.type, lastModified: file.lastModified });
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encrypted_file.xep454_ivkey = arrayBufferToHex(iv) + arrayBufferToHex(exported_key);
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return encrypted_file;
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}
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export function setEncryptedFileURL (message, attrs) {
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const url = attrs.oob_url.replace(/^https?:/, 'aesgcm:') + '#' + message.file.xep454_ivkey;
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return Object.assign(attrs, {
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'oob_url': null, // Since only the body gets encrypted, we don't set the oob_url
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'message': url,
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'body': url
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});
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}
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async function decryptFile (iv, key, cipher) {
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const key_obj = await crypto.subtle.importKey('raw', hexToArrayBuffer(key), 'AES-GCM', false, ['decrypt']);
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const algo = {
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'name': 'AES-GCM',
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'iv': hexToArrayBuffer(iv),
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};
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return crypto.subtle.decrypt(algo, key_obj, cipher);
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}
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async function downloadFile(url) {
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let response;
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try {
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response = await fetch(url)
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} catch(e) {
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log.error(`${e.name}: Failed to download encrypted media: ${url}`);
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log.error(e);
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return null;
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}
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if (response.status >= 200 && response.status < 400) {
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return response.arrayBuffer();
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}
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}
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async function getAndDecryptFile (uri) {
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const protocol = (window.location.hostname === 'localhost' && uri.domain() === 'localhost') ? 'http' : 'https';
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const http_url = uri.toString().replace(/^aesgcm/, protocol);
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const cipher = await downloadFile(http_url);
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if (cipher === null) {
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log.error(`Could not decrypt a received encrypted file ${uri.toString()} since it could not be downloaded`);
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return new Error(__('Error: could not decrypt a received encrypted file, because it could not be downloaded'));
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}
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const hash = uri.hash().slice(1);
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const key = hash.substring(hash.length-64);
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const iv = hash.replace(key, '');
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let content;
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try {
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content = await decryptFile(iv, key, cipher);
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} catch (e) {
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log.error(`Could not decrypt file ${uri.toString()}`);
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log.error(e);
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return null;
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}
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const [filename, extension] = uri.filename().split('.');
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const mimetype = MIMETYPES_MAP[extension];
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try {
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const file = new File([content], filename, { 'type': mimetype });
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return URL.createObjectURL(file);
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} catch (e) {
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log.error(`Could not decrypt file ${uri.toString()}`);
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log.error(e);
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return null;
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}
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}
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function getTemplateForObjectURL (uri, obj_url, richtext) {
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if (isError(obj_url)) {
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return html`<p class="error">${obj_url.message}</p>`;
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}
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const file_url = uri.toString();
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if (isImageURL(file_url)) {
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return tplImage({
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'src': obj_url,
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'onClick': richtext.onImgClick,
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'onLoad': richtext.onImgLoad
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});
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} else if (isAudioURL(file_url)) {
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return tplAudio(obj_url);
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} else if (isVideoURL(file_url)) {
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return tplVideo(obj_url);
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} else {
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return tplFile(obj_url, uri.filename());
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}
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}
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function addEncryptedFiles(text, offset, richtext) {
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const objs = [];
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try {
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const parse_options = { 'start': /\b(aesgcm:\/\/)/gi };
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URI.withinString(
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text,
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(url, start, end) => {
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objs.push({ url, start, end });
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return url;
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},
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parse_options
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);
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} catch (error) {
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log.debug(error);
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return;
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}
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objs.forEach(o => {
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const uri = getURI(text.slice(o.start, o.end));
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const promise = getAndDecryptFile(uri)
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.then(obj_url => getTemplateForObjectURL(uri, obj_url, richtext));
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const template = html`${until(promise, '')}`;
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richtext.addTemplateResult(o.start + offset, o.end + offset, template);
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});
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}
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export function handleEncryptedFiles (richtext) {
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if (!_converse.config.get('trusted')) {
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return;
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}
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richtext.addAnnotations((text, offset) => addEncryptedFiles(text, offset, richtext));
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}
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/**
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* Hook handler for { @link parseMessage } and { @link parseMUCMessage }, which
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* parses the passed in `message` stanza for OMEMO attributes and then sets
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* them on the attrs object.
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* @param { XMLElement } stanza - The message stanza
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* @param { (MUCMessageAttributes|MessageAttributes) } attrs
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* @returns (MUCMessageAttributes|MessageAttributes)
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*/
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export async function parseEncryptedMessage (stanza, attrs) {
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if (api.settings.get('clear_cache_on_logout') ||
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!attrs.is_encrypted ||
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attrs.encryption_namespace !== Strophe.NS.OMEMO) {
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return attrs;
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}
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const encrypted_el = sizzle(`encrypted[xmlns="${Strophe.NS.OMEMO}"]`, stanza).pop();
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const header = encrypted_el.querySelector('header');
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attrs.encrypted = { 'device_id': header.getAttribute('sid') };
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const device_id = await api.omemo?.getDeviceID();
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const key = device_id && sizzle(`key[rid="${device_id}"]`, encrypted_el).pop();
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if (key) {
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Object.assign(attrs.encrypted, {
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'iv': header.querySelector('iv').textContent,
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'key': key.textContent,
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'payload': encrypted_el.querySelector('payload')?.textContent || null,
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'prekey': ['true', '1'].includes(key.getAttribute('prekey'))
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});
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} else {
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return Object.assign(attrs, {
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'error_condition': 'not-encrypted-for-this-device',
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'error_type': 'Decryption',
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'is_ephemeral': true,
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'is_error': true,
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'type': 'error'
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});
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}
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// https://xmpp.org/extensions/xep-0384.html#usecases-receiving
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if (attrs.encrypted.prekey === true) {
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return decryptPrekeyWhisperMessage(attrs);
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} else {
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return decryptWhisperMessage(attrs);
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}
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}
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export function onChatBoxesInitialized () {
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_converse.chatboxes.on('add', chatbox => {
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checkOMEMOSupported(chatbox);
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if (chatbox.get('type') === _converse.CHATROOMS_TYPE) {
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chatbox.occupants.on('add', o => onOccupantAdded(chatbox, o));
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chatbox.features.on('change', () => checkOMEMOSupported(chatbox));
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}
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});
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}
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export function onChatInitialized (el) {
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el.listenTo(el.model.messages, 'add', message => {
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if (message.get('is_encrypted') && !message.get('is_error')) {
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el.model.save('omemo_supported', true);
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}
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});
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el.listenTo(el.model, 'change:omemo_supported', () => {
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if (!el.model.get('omemo_supported') && el.model.get('omemo_active')) {
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el.model.set('omemo_active', false);
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} else {
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// Manually trigger an update, setting omemo_active to
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// false above will automatically trigger one.
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el.querySelector('converse-chat-toolbar')?.requestUpdate();
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}
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});
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el.listenTo(el.model, 'change:omemo_active', () => {
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el.querySelector('converse-chat-toolbar').requestUpdate();
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});
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}
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export function getSessionCipher (jid, id) {
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const address = new libsignal.SignalProtocolAddress(jid, id);
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return new window.libsignal.SessionCipher(_converse.omemo_store, address);
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}
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function getJIDForDecryption (attrs) {
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const from_jid = attrs.from_muc ? attrs.from_real_jid : attrs.from;
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if (!from_jid) {
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Object.assign(attrs, {
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'error_text': __("Sorry, could not decrypt a received OMEMO "+
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"message because we don't have the XMPP address for that user."),
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'error_type': 'Decryption',
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'is_ephemeral': true,
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'is_error': true,
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'type': 'error'
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});
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throw new Error("Could not find JID to decrypt OMEMO message for");
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}
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return from_jid;
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}
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async function handleDecryptedWhisperMessage (attrs, key_and_tag) {
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const from_jid = getJIDForDecryption(attrs);
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const devicelist = await api.omemo.devicelists.get(from_jid, true);
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const encrypted = attrs.encrypted;
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let device = devicelist.devices.get(encrypted.device_id);
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if (!device) {
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device = await devicelist.devices.create({ 'id': encrypted.device_id, 'jid': from_jid }, { 'promise': true });
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}
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if (encrypted.payload) {
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const key = key_and_tag.slice(0, 16);
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const tag = key_and_tag.slice(16);
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const result = await omemo.decryptMessage(Object.assign(encrypted, { 'key': key, 'tag': tag }));
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device.save('active', true);
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return result;
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}
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}
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function getDecryptionErrorAttributes (e) {
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return {
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'error_text':
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__('Sorry, could not decrypt a received OMEMO message due to an error.') + ` ${e.name} ${e.message}`,
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'error_condition': e.name,
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'error_message': e.message,
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'error_type': 'Decryption',
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'is_ephemeral': true,
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'is_error': true,
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'type': 'error'
|
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};
|
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}
|
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async function decryptPrekeyWhisperMessage (attrs) {
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const from_jid = getJIDForDecryption(attrs);
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const session_cipher = getSessionCipher(from_jid, parseInt(attrs.encrypted.device_id, 10));
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const key = base64ToArrayBuffer(attrs.encrypted.key);
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let key_and_tag;
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try {
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key_and_tag = await session_cipher.decryptPreKeyWhisperMessage(key, 'binary');
|
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} catch (e) {
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// TODO from the XEP:
|
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// There are various reasons why decryption of an
|
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// OMEMOKeyExchange or an OMEMOAuthenticatedMessage
|
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// could fail. One reason is if the message was
|
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// received twice and already decrypted once, in this
|
||
// case the client MUST ignore the decryption failure
|
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// and not show any warnings/errors. In all other cases
|
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// of decryption failure, clients SHOULD respond by
|
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// forcibly doing a new key exchange and sending a new
|
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// OMEMOKeyExchange with a potentially empty SCE
|
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// payload. By building a new session with the original
|
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// sender this way, the invalid session of the original
|
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// sender will get overwritten with this newly created,
|
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// valid session.
|
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log.error(`${e.name} ${e.message}`);
|
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return Object.assign(attrs, getDecryptionErrorAttributes(e));
|
||
}
|
||
// TODO from the XEP:
|
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// When a client receives the first message for a given
|
||
// ratchet key with a counter of 53 or higher, it MUST send
|
||
// a heartbeat message. Heartbeat messages are normal OMEMO
|
||
// encrypted messages where the SCE payload does not include
|
||
// any elements. These heartbeat messages cause the ratchet
|
||
// to forward, thus consequent messages will have the
|
||
// counter restarted from 0.
|
||
try {
|
||
const plaintext = await handleDecryptedWhisperMessage(attrs, key_and_tag);
|
||
await _converse.omemo_store.generateMissingPreKeys();
|
||
await _converse.omemo_store.publishBundle();
|
||
if (plaintext) {
|
||
return Object.assign(attrs, { 'plaintext': plaintext });
|
||
} else {
|
||
return Object.assign(attrs, { 'is_only_key': true });
|
||
}
|
||
} catch (e) {
|
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log.error(`${e.name} ${e.message}`);
|
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return Object.assign(attrs, getDecryptionErrorAttributes(e));
|
||
}
|
||
}
|
||
|
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async function decryptWhisperMessage (attrs) {
|
||
const from_jid = getJIDForDecryption(attrs);
|
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const session_cipher = getSessionCipher(from_jid, parseInt(attrs.encrypted.device_id, 10));
|
||
const key = base64ToArrayBuffer(attrs.encrypted.key);
|
||
try {
|
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const key_and_tag = await session_cipher.decryptWhisperMessage(key, 'binary');
|
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const plaintext = await handleDecryptedWhisperMessage(attrs, key_and_tag);
|
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return Object.assign(attrs, { 'plaintext': plaintext });
|
||
} catch (e) {
|
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log.error(`${e.name} ${e.message}`);
|
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return Object.assign(attrs, getDecryptionErrorAttributes(e));
|
||
}
|
||
}
|
||
|
||
export function addKeysToMessageStanza (stanza, dicts, iv) {
|
||
for (const i in dicts) {
|
||
if (Object.prototype.hasOwnProperty.call(dicts, i)) {
|
||
const payload = dicts[i].payload;
|
||
const device = dicts[i].device;
|
||
const prekey = 3 == parseInt(payload.type, 10);
|
||
|
||
stanza.c('key', { 'rid': device.get('id') }).t(btoa(payload.body));
|
||
if (prekey) {
|
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stanza.attrs({ 'prekey': prekey });
|
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}
|
||
stanza.up();
|
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if (i == dicts.length - 1) {
|
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stanza.c('iv').t(iv).up().up();
|
||
}
|
||
}
|
||
}
|
||
return Promise.resolve(stanza);
|
||
}
|
||
|
||
/**
|
||
* Given an XML element representing a user's OMEMO bundle, parse it
|
||
* and return a map.
|
||
*/
|
||
export function parseBundle (bundle_el) {
|
||
const signed_prekey_public_el = bundle_el.querySelector('signedPreKeyPublic');
|
||
const signed_prekey_signature_el = bundle_el.querySelector('signedPreKeySignature');
|
||
const prekeys = sizzle(`prekeys > preKeyPublic`, bundle_el).map(el => ({
|
||
'id': parseInt(el.getAttribute('preKeyId'), 10),
|
||
'key': el.textContent
|
||
}));
|
||
return {
|
||
'identity_key': bundle_el.querySelector('identityKey').textContent.trim(),
|
||
'signed_prekey': {
|
||
'id': parseInt(signed_prekey_public_el.getAttribute('signedPreKeyId'), 10),
|
||
'public_key': signed_prekey_public_el.textContent,
|
||
'signature': signed_prekey_signature_el.textContent
|
||
},
|
||
'prekeys': prekeys
|
||
};
|
||
}
|
||
|
||
export async function generateFingerprint (device) {
|
||
if (device.get('bundle')?.fingerprint) {
|
||
return;
|
||
}
|
||
const bundle = await device.getBundle();
|
||
bundle['fingerprint'] = arrayBufferToHex(base64ToArrayBuffer(bundle['identity_key']));
|
||
device.save('bundle', bundle);
|
||
device.trigger('change:bundle'); // Doesn't get triggered automatically due to pass-by-reference
|
||
}
|
||
|
||
export async function getDevicesForContact (jid) {
|
||
await api.waitUntil('OMEMOInitialized');
|
||
const devicelist = await api.omemo.devicelists.get(jid, true);
|
||
await devicelist.fetchDevices();
|
||
return devicelist.devices;
|
||
}
|
||
|
||
export async function generateDeviceID () {
|
||
/* Generates a device ID, making sure that it's unique */
|
||
const devicelist = await api.omemo.devicelists.get(_converse.bare_jid, true);
|
||
const existing_ids = devicelist.devices.pluck('id');
|
||
let device_id = libsignal.KeyHelper.generateRegistrationId();
|
||
|
||
// Before publishing a freshly generated device id for the first time,
|
||
// a device MUST check whether that device id already exists, and if so, generate a new one.
|
||
let i = 0;
|
||
while (existing_ids.includes(device_id)) {
|
||
device_id = libsignal.KeyHelper.generateRegistrationId();
|
||
i++;
|
||
if (i === 10) {
|
||
throw new Error('Unable to generate a unique device ID');
|
||
}
|
||
}
|
||
return device_id.toString();
|
||
}
|
||
|
||
async function buildSession (device) {
|
||
const address = new libsignal.SignalProtocolAddress(device.get('jid'), device.get('id'));
|
||
const sessionBuilder = new libsignal.SessionBuilder(_converse.omemo_store, address);
|
||
const prekey = device.getRandomPreKey();
|
||
const bundle = await device.getBundle();
|
||
|
||
return sessionBuilder.processPreKey({
|
||
'registrationId': parseInt(device.get('id'), 10),
|
||
'identityKey': base64ToArrayBuffer(bundle.identity_key),
|
||
'signedPreKey': {
|
||
'keyId': bundle.signed_prekey.id, // <Number>
|
||
'publicKey': base64ToArrayBuffer(bundle.signed_prekey.public_key),
|
||
'signature': base64ToArrayBuffer(bundle.signed_prekey.signature)
|
||
},
|
||
'preKey': {
|
||
'keyId': prekey.id, // <Number>
|
||
'publicKey': base64ToArrayBuffer(prekey.key)
|
||
}
|
||
});
|
||
}
|
||
|
||
export async function getSession (device) {
|
||
if (!device.get('bundle')) {
|
||
log.error(`Could not build an OMEMO session for device ${device.get('id')} because we don't have its bundle`);
|
||
return null;
|
||
}
|
||
const address = new libsignal.SignalProtocolAddress(device.get('jid'), device.get('id'));
|
||
const session = await _converse.omemo_store.loadSession(address.toString());
|
||
if (session) {
|
||
return session;
|
||
} else {
|
||
try {
|
||
const session = await buildSession(device);
|
||
return session;
|
||
} catch (e) {
|
||
log.error(`Could not build an OMEMO session for device ${device.get('id')}`);
|
||
log.error(e);
|
||
return null;
|
||
}
|
||
}
|
||
}
|
||
|
||
async function updateBundleFromStanza (stanza) {
|
||
const items_el = sizzle(`items`, stanza).pop();
|
||
if (!items_el || !items_el.getAttribute('node').startsWith(Strophe.NS.OMEMO_BUNDLES)) {
|
||
return;
|
||
}
|
||
const device_id = items_el.getAttribute('node').split(':')[1];
|
||
const jid = stanza.getAttribute('from');
|
||
const bundle_el = sizzle(`item > bundle`, items_el).pop();
|
||
const devicelist = await api.omemo.devicelists.get(jid, true);
|
||
const device = devicelist.devices.get(device_id) || devicelist.devices.create({ 'id': device_id, jid });
|
||
device.save({ 'bundle': parseBundle(bundle_el) });
|
||
}
|
||
|
||
async function updateDevicesFromStanza (stanza) {
|
||
const items_el = sizzle(`items[node="${Strophe.NS.OMEMO_DEVICELIST}"]`, stanza).pop();
|
||
if (!items_el) {
|
||
return;
|
||
}
|
||
const device_selector = `item list[xmlns="${Strophe.NS.OMEMO}"] device`;
|
||
const device_ids = sizzle(device_selector, items_el).map(d => d.getAttribute('id'));
|
||
const jid = stanza.getAttribute('from');
|
||
const devicelist = await api.omemo.devicelists.get(jid, true);
|
||
const devices = devicelist.devices;
|
||
const removed_ids = difference(devices.pluck('id'), device_ids);
|
||
|
||
removed_ids.forEach(id => {
|
||
if (jid === _converse.bare_jid && id === _converse.omemo_store.get('device_id')) {
|
||
return; // We don't set the current device as inactive
|
||
}
|
||
devices.get(id).save('active', false);
|
||
});
|
||
device_ids.forEach(device_id => {
|
||
const device = devices.get(device_id);
|
||
if (device) {
|
||
device.save('active', true);
|
||
} else {
|
||
devices.create({ 'id': device_id, 'jid': jid });
|
||
}
|
||
});
|
||
if (u.isSameBareJID(jid, _converse.bare_jid)) {
|
||
// Make sure our own device is on the list
|
||
// (i.e. if it was removed, add it again).
|
||
devicelist.publishCurrentDevice(device_ids);
|
||
}
|
||
}
|
||
|
||
export function registerPEPPushHandler () {
|
||
// Add a handler for devices pushed from other connected clients
|
||
_converse.connection.addHandler(
|
||
async message => {
|
||
try {
|
||
if (sizzle(`event[xmlns="${Strophe.NS.PUBSUB}#event"]`, message).length) {
|
||
await api.waitUntil('OMEMOInitialized');
|
||
await updateDevicesFromStanza(message);
|
||
await updateBundleFromStanza(message);
|
||
}
|
||
} catch (e) {
|
||
log.error(e.message);
|
||
}
|
||
return true;
|
||
},
|
||
null,
|
||
'message',
|
||
'headline'
|
||
);
|
||
}
|
||
|
||
export async function restoreOMEMOSession () {
|
||
if (_converse.omemo_store === undefined) {
|
||
const id = `converse.omemosession-${_converse.bare_jid}`;
|
||
_converse.omemo_store = new _converse.OMEMOStore({ id });
|
||
initStorage(_converse.omemo_store, id);
|
||
}
|
||
await _converse.omemo_store.fetchSession();
|
||
}
|
||
|
||
async function fetchDeviceLists () {
|
||
_converse.devicelists = new _converse.DeviceLists();
|
||
const id = `converse.devicelists-${_converse.bare_jid}`;
|
||
initStorage(_converse.devicelists, id);
|
||
await new Promise(resolve => {
|
||
_converse.devicelists.fetch({
|
||
'success': resolve,
|
||
'error': (_m, e) => { log.error(e); resolve(); }
|
||
})
|
||
});
|
||
// Call API method to wait for our own device list to be fetched from the
|
||
// server or to be created. If we have no pre-existing OMEMO session, this
|
||
// will cause a new device and bundle to be generated and published.
|
||
await api.omemo.devicelists.get(_converse.bare_jid, true);
|
||
}
|
||
|
||
export async function initOMEMO (reconnecting) {
|
||
if (reconnecting) {
|
||
return;
|
||
}
|
||
if (!_converse.config.get('trusted') || api.settings.get('clear_cache_on_logout')) {
|
||
log.warn('Not initializing OMEMO, since this browser is not trusted or clear_cache_on_logout is set to true');
|
||
return;
|
||
}
|
||
try {
|
||
await fetchDeviceLists();
|
||
await restoreOMEMOSession();
|
||
await _converse.omemo_store.publishBundle();
|
||
} catch (e) {
|
||
log.error('Could not initialize OMEMO support');
|
||
log.error(e);
|
||
return;
|
||
}
|
||
/**
|
||
* Triggered once OMEMO support has been initialized
|
||
* @event _converse#OMEMOInitialized
|
||
* @example _converse.api.listen.on('OMEMOInitialized', () => { ... });
|
||
*/
|
||
api.trigger('OMEMOInitialized');
|
||
}
|
||
|
||
async function onOccupantAdded (chatroom, occupant) {
|
||
if (occupant.isSelf() || !chatroom.features.get('nonanonymous') || !chatroom.features.get('membersonly')) {
|
||
return;
|
||
}
|
||
if (chatroom.get('omemo_active')) {
|
||
const supported = await _converse.contactHasOMEMOSupport(occupant.get('jid'));
|
||
if (!supported) {
|
||
chatroom.createMessage({
|
||
'message': __(
|
||
"%1$s doesn't appear to have a client that supports OMEMO. " +
|
||
'Encrypted chat will no longer be possible in this grouchat.',
|
||
occupant.get('nick')
|
||
),
|
||
'type': 'error'
|
||
});
|
||
chatroom.save({ 'omemo_active': false, 'omemo_supported': false });
|
||
}
|
||
}
|
||
}
|
||
|
||
async function checkOMEMOSupported (chatbox) {
|
||
let supported;
|
||
if (chatbox.get('type') === _converse.CHATROOMS_TYPE) {
|
||
await api.waitUntil('OMEMOInitialized');
|
||
supported = chatbox.features.get('nonanonymous') && chatbox.features.get('membersonly');
|
||
} else if (chatbox.get('type') === _converse.PRIVATE_CHAT_TYPE) {
|
||
supported = await _converse.contactHasOMEMOSupport(chatbox.get('jid'));
|
||
}
|
||
chatbox.set('omemo_supported', supported);
|
||
if (supported && api.settings.get('omemo_default')) {
|
||
chatbox.set('omemo_active', true);
|
||
}
|
||
}
|
||
|
||
function toggleOMEMO (ev) {
|
||
ev.stopPropagation();
|
||
ev.preventDefault();
|
||
const toolbar_el = u.ancestor(ev.target, 'converse-chat-toolbar');
|
||
if (!toolbar_el.model.get('omemo_supported')) {
|
||
let messages;
|
||
if (toolbar_el.model.get('type') === _converse.CHATROOMS_TYPE) {
|
||
messages = [
|
||
__(
|
||
'Cannot use end-to-end encryption in this groupchat, ' +
|
||
'either the groupchat has some anonymity or not all participants support OMEMO.'
|
||
)
|
||
];
|
||
} else {
|
||
messages = [
|
||
__(
|
||
"Cannot use end-to-end encryption because %1$s uses a client that doesn't support OMEMO.",
|
||
toolbar_el.model.contact.getDisplayName()
|
||
)
|
||
];
|
||
}
|
||
return api.alert('error', __('Error'), messages);
|
||
}
|
||
toolbar_el.model.save({ 'omemo_active': !toolbar_el.model.get('omemo_active') });
|
||
}
|
||
|
||
export function getOMEMOToolbarButton (toolbar_el, buttons) {
|
||
const model = toolbar_el.model;
|
||
const is_muc = model.get('type') === _converse.CHATROOMS_TYPE;
|
||
let title;
|
||
if (model.get('omemo_supported')) {
|
||
const i18n_plaintext = __('Messages are being sent in plaintext');
|
||
const i18n_encrypted = __('Messages are sent encrypted');
|
||
title = model.get('omemo_active') ? i18n_encrypted : i18n_plaintext;
|
||
} else if (is_muc) {
|
||
title = __(
|
||
'This groupchat needs to be members-only and non-anonymous in ' +
|
||
'order to support OMEMO encrypted messages'
|
||
);
|
||
} else {
|
||
title = __('OMEMO encryption is not supported');
|
||
}
|
||
|
||
let color;
|
||
if (model.get('omemo_supported')) {
|
||
if (model.get('omemo_active')) {
|
||
color = is_muc ? `var(--muc-color)` : `var(--chat-toolbar-btn-color)`;
|
||
} else {
|
||
color = `var(--error-color)`;
|
||
}
|
||
} else {
|
||
color = `var(--muc-toolbar-btn-disabled-color)`;
|
||
}
|
||
buttons.push(html`
|
||
<button class="toggle-omemo" title="${title}" data-disabled=${!model.get('omemo_supported')} @click=${toggleOMEMO}>
|
||
<converse-icon
|
||
class="fa ${model.get('omemo_active') ? `fa-lock` : `fa-unlock`}"
|
||
path-prefix="${api.settings.get('assets_path')}"
|
||
size="1em"
|
||
color="${color}"
|
||
></converse-icon>
|
||
</button>
|
||
`);
|
||
return buttons;
|
||
}
|
||
|
||
|
||
async function getBundlesAndBuildSessions (chatbox) {
|
||
const no_devices_err = __('Sorry, no devices found to which we can send an OMEMO encrypted message.');
|
||
let devices;
|
||
if (chatbox.get('type') === _converse.CHATROOMS_TYPE) {
|
||
const collections = await Promise.all(chatbox.occupants.map(o => getDevicesForContact(o.get('jid'))));
|
||
devices = collections.reduce((a, b) => concat(a, b.models), []);
|
||
} else if (chatbox.get('type') === _converse.PRIVATE_CHAT_TYPE) {
|
||
const their_devices = await getDevicesForContact(chatbox.get('jid'));
|
||
if (their_devices.length === 0) {
|
||
const err = new Error(no_devices_err);
|
||
err.user_facing = true;
|
||
throw err;
|
||
}
|
||
const own_list = await api.omemo.devicelists.get(_converse.bare_jid)
|
||
const own_devices = own_list.devices;
|
||
devices = [...own_devices.models, ...their_devices.models];
|
||
}
|
||
// Filter out our own device
|
||
const id = _converse.omemo_store.get('device_id');
|
||
devices = devices.filter(d => d.get('id') !== id);
|
||
// Fetch bundles if necessary
|
||
await Promise.all(devices.map(d => d.getBundle()));
|
||
|
||
const sessions = devices.filter(d => d).map(d => getSession(d));
|
||
await Promise.all(sessions);
|
||
if (sessions.includes(null)) {
|
||
// We couldn't build a session for certain devices.
|
||
devices = devices.filter(d => sessions[devices.indexOf(d)]);
|
||
if (devices.length === 0) {
|
||
const err = new Error(no_devices_err);
|
||
err.user_facing = true;
|
||
throw err;
|
||
}
|
||
}
|
||
return devices;
|
||
}
|
||
|
||
function encryptKey (key_and_tag, device) {
|
||
return getSessionCipher(device.get('jid'), device.get('id'))
|
||
.encrypt(key_and_tag)
|
||
.then(payload => ({ 'payload': payload, 'device': device }));
|
||
}
|
||
|
||
export async function createOMEMOMessageStanza (chat, data) {
|
||
let { stanza } = data;
|
||
const { message } = data;
|
||
if (!message.get('is_encrypted')) {
|
||
return data;
|
||
}
|
||
if (!message.get('body')) {
|
||
throw new Error('No message body to encrypt!');
|
||
}
|
||
const devices = await getBundlesAndBuildSessions(chat);
|
||
|
||
// An encrypted header is added to the message for
|
||
// each device that is supposed to receive it.
|
||
// These headers simply contain the key that the
|
||
// payload message is encrypted with,
|
||
// and they are separately encrypted using the
|
||
// session corresponding to the counterpart device.
|
||
stanza.c('encrypted', { 'xmlns': Strophe.NS.OMEMO })
|
||
.c('header', { 'sid': _converse.omemo_store.get('device_id') });
|
||
|
||
const { key_and_tag, iv, payload } = await omemo.encryptMessage(message.get('plaintext'));
|
||
|
||
// The 16 bytes key and the GCM authentication tag (The tag
|
||
// SHOULD have at least 128 bit) are concatenated and for each
|
||
// intended recipient device, i.e. both own devices as well as
|
||
// devices associated with the contact, the result of this
|
||
// concatenation is encrypted using the corresponding
|
||
// long-standing SignalProtocol session.
|
||
const dicts = await Promise.all(devices
|
||
.filter(device => device.get('trusted') != UNTRUSTED && device.get('active'))
|
||
.map(device => encryptKey(key_and_tag, device)));
|
||
|
||
stanza = await addKeysToMessageStanza(stanza, dicts, iv);
|
||
stanza.c('payload').t(payload).up().up();
|
||
stanza.c('store', { 'xmlns': Strophe.NS.HINTS }).up();
|
||
stanza.c('encryption', { 'xmlns': Strophe.NS.EME, namespace: Strophe.NS.OMEMO });
|
||
return { message, stanza };
|
||
}
|
||
|
||
export const omemo = {
|
||
decryptMessage,
|
||
encryptMessage,
|
||
formatFingerprint
|
||
}
|