707 lines
22 KiB
TypeScript
707 lines
22 KiB
TypeScript
// Copyright 2020-2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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/* eslint-disable @typescript-eslint/no-explicit-any */
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/* eslint-disable @typescript-eslint/ban-types */
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/* eslint-disable more/no-then */
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/* eslint-disable class-methods-use-this */
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/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
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import PQueue from 'p-queue';
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import EventTarget from './EventTarget';
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import { WebAPIType } from './WebAPI';
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import { KeyPairType, CompatSignedPreKeyType } from './Types.d';
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import utils from './Helpers';
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import ProvisioningCipher from './ProvisioningCipher';
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import { IncomingWebSocketRequest } from './WebsocketResources';
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import createTaskWithTimeout from './TaskWithTimeout';
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import * as Bytes from '../Bytes';
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import {
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deriveAccessKey,
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generateRegistrationId,
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getRandomBytes,
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typedArrayToArrayBuffer,
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} from '../Crypto';
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import {
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generateKeyPair,
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generateSignedPreKey,
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generatePreKey,
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} from '../Curve';
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import { isMoreRecentThan, isOlderThan } from '../util/timestamp';
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import { ourProfileKeyService } from '../services/ourProfileKey';
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import { assert } from '../util/assert';
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import { getProvisioningUrl } from '../util/getProvisioningUrl';
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import { SignalService as Proto } from '../protobuf';
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const DAY = 24 * 60 * 60 * 1000;
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const MINIMUM_SIGNED_PREKEYS = 5;
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const ARCHIVE_AGE = 30 * DAY;
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const PREKEY_ROTATION_AGE = DAY * 1.5;
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const PROFILE_KEY_LENGTH = 32;
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const SIGNED_KEY_GEN_BATCH_SIZE = 100;
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// TODO: remove once we move away from ArrayBuffers
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const FIXMEU8 = Uint8Array;
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function getIdentifier(id: string | undefined) {
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if (!id || !id.length) {
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return id;
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}
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const parts = id.split('.');
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if (!parts.length) {
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return id;
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}
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return parts[0];
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}
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type GeneratedKeysType = {
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preKeys: Array<{
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keyId: number;
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publicKey: ArrayBuffer;
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}>;
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signedPreKey: {
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keyId: number;
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publicKey: ArrayBuffer;
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signature: ArrayBuffer;
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keyPair: KeyPairType;
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};
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identityKey: ArrayBuffer;
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};
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export default class AccountManager extends EventTarget {
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pending: Promise<void>;
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pendingQueue?: PQueue;
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constructor(private readonly server: WebAPIType) {
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super();
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this.pending = Promise.resolve();
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}
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async requestVoiceVerification(number: string) {
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return this.server.requestVerificationVoice(number);
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}
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async requestSMSVerification(number: string) {
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return this.server.requestVerificationSMS(number);
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}
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async encryptDeviceName(name: string, providedIdentityKey?: KeyPairType) {
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if (!name) {
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return null;
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}
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const identityKey =
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providedIdentityKey ||
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(await window.textsecure.storage.protocol.getIdentityKeyPair());
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if (!identityKey) {
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throw new Error('Identity key was not provided and is not in database!');
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}
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const encrypted = await window.Signal.Crypto.encryptDeviceName(
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name,
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identityKey.pubKey
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);
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const proto = new Proto.DeviceName();
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proto.ephemeralPublic = new FIXMEU8(encrypted.ephemeralPublic);
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proto.syntheticIv = new FIXMEU8(encrypted.syntheticIv);
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proto.ciphertext = new FIXMEU8(encrypted.ciphertext);
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const bytes = Proto.DeviceName.encode(proto).finish();
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return Bytes.toBase64(bytes);
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}
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async decryptDeviceName(base64: string) {
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const identityKey = await window.textsecure.storage.protocol.getIdentityKeyPair();
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if (!identityKey) {
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throw new Error('decryptDeviceName: No identity key pair!');
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}
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const bytes = Bytes.fromBase64(base64);
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const proto = Proto.DeviceName.decode(bytes);
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assert(
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proto.ephemeralPublic && proto.syntheticIv && proto.ciphertext,
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'Missing required fields in DeviceName'
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);
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const encrypted = {
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ephemeralPublic: typedArrayToArrayBuffer(proto.ephemeralPublic),
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syntheticIv: typedArrayToArrayBuffer(proto.syntheticIv),
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ciphertext: typedArrayToArrayBuffer(proto.ciphertext),
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};
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const name = await window.Signal.Crypto.decryptDeviceName(
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encrypted,
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identityKey.privKey
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);
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return name;
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}
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async maybeUpdateDeviceName() {
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const isNameEncrypted = window.textsecure.storage.user.getDeviceNameEncrypted();
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if (isNameEncrypted) {
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return;
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}
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const deviceName = window.textsecure.storage.user.getDeviceName();
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const base64 = await this.encryptDeviceName(deviceName || '');
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if (base64) {
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await this.server.updateDeviceName(base64);
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}
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}
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async deviceNameIsEncrypted() {
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await window.textsecure.storage.user.setDeviceNameEncrypted();
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}
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async registerSingleDevice(number: string, verificationCode: string) {
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return this.queueTask(async () => {
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const identityKeyPair = generateKeyPair();
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const profileKey = getRandomBytes(PROFILE_KEY_LENGTH);
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const accessKey = await deriveAccessKey(profileKey);
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await this.createAccount(
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number,
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verificationCode,
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identityKeyPair,
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profileKey,
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null,
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null,
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null,
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{ accessKey }
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);
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await this.clearSessionsAndPreKeys();
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const keys = await this.generateKeys(SIGNED_KEY_GEN_BATCH_SIZE);
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await this.server.registerKeys(keys);
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await this.confirmKeys(keys);
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await this.registrationDone();
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});
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}
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async registerSecondDevice(
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setProvisioningUrl: Function,
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confirmNumber: (number?: string) => Promise<string>,
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progressCallback: Function
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) {
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const createAccount = this.createAccount.bind(this);
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const clearSessionsAndPreKeys = this.clearSessionsAndPreKeys.bind(this);
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const generateKeys = this.generateKeys.bind(
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this,
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SIGNED_KEY_GEN_BATCH_SIZE,
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progressCallback
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);
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const provisioningCipher = new ProvisioningCipher();
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const pubKey = await provisioningCipher.getPublicKey();
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let envelopeCallbacks:
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| {
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resolve(data: Proto.ProvisionEnvelope): void;
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reject(error: Error): void;
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}
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| undefined;
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const envelopePromise = new Promise<Proto.ProvisionEnvelope>(
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(resolve, reject) => {
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envelopeCallbacks = { resolve, reject };
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}
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);
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const wsr = await this.server.getProvisioningResource({
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handleRequest(request: IncomingWebSocketRequest) {
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if (
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request.path === '/v1/address' &&
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request.verb === 'PUT' &&
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request.body
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) {
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const proto = Proto.ProvisioningUuid.decode(request.body);
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const { uuid } = proto;
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if (!uuid) {
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throw new Error('registerSecondDevice: expected a UUID');
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}
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const url = getProvisioningUrl(uuid, pubKey);
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window.CI?.setProvisioningURL(url);
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setProvisioningUrl(url);
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request.respond(200, 'OK');
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} else if (
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request.path === '/v1/message' &&
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request.verb === 'PUT' &&
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request.body
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) {
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const envelope = Proto.ProvisionEnvelope.decode(request.body);
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request.respond(200, 'OK');
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wsr.close();
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envelopeCallbacks?.resolve(envelope);
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} else {
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window.log.error('Unknown websocket message', request.path);
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}
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},
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});
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window.log.info('provisioning socket open');
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wsr.addEventListener('close', ({ code, reason }) => {
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window.log.info(
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`provisioning socket closed. Code: ${code} Reason: ${reason}`
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);
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// Note: if we have resolved the envelope already - this has no effect
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envelopeCallbacks?.reject(new Error('websocket closed'));
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});
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const envelope = await envelopePromise;
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const provisionMessage = await provisioningCipher.decrypt(envelope);
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await this.queueTask(async () => {
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const deviceName = await confirmNumber(provisionMessage.number);
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if (typeof deviceName !== 'string' || deviceName.length === 0) {
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throw new Error(
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'AccountManager.registerSecondDevice: Invalid device name'
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);
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}
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if (
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!provisionMessage.number ||
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!provisionMessage.provisioningCode ||
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!provisionMessage.identityKeyPair
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) {
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throw new Error(
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'AccountManager.registerSecondDevice: Provision message was missing key data'
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);
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}
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await createAccount(
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provisionMessage.number,
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provisionMessage.provisioningCode,
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provisionMessage.identityKeyPair,
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provisionMessage.profileKey,
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deviceName,
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provisionMessage.userAgent,
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provisionMessage.readReceipts,
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{ uuid: provisionMessage.uuid }
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);
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await clearSessionsAndPreKeys();
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const keys = await generateKeys();
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await this.server.registerKeys(keys);
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await this.confirmKeys(keys);
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await this.registrationDone();
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});
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}
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async refreshPreKeys() {
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const generateKeys = this.generateKeys.bind(
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this,
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SIGNED_KEY_GEN_BATCH_SIZE
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);
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const registerKeys = this.server.registerKeys.bind(this.server);
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return this.queueTask(async () =>
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this.server.getMyKeys().then(async preKeyCount => {
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window.log.info(`prekey count ${preKeyCount}`);
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if (preKeyCount < 10) {
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return generateKeys().then(registerKeys);
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}
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return null;
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})
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);
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}
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async rotateSignedPreKey() {
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return this.queueTask(async () => {
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const signedKeyId = window.textsecure.storage.get('signedKeyId', 1);
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if (typeof signedKeyId !== 'number') {
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throw new Error('Invalid signedKeyId');
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}
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const store = window.textsecure.storage.protocol;
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const { server, cleanSignedPreKeys } = this;
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const existingKeys = await store.loadSignedPreKeys();
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existingKeys.sort((a, b) => (b.created_at || 0) - (a.created_at || 0));
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const confirmedKeys = existingKeys.filter(key => key.confirmed);
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const mostRecent = confirmedKeys[0];
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if (isMoreRecentThan(mostRecent?.created_at || 0, PREKEY_ROTATION_AGE)) {
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window.log.warn(
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`rotateSignedPreKey: ${confirmedKeys.length} confirmed keys, most recent was created ${mostRecent?.created_at}. Cancelling rotation.`
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);
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return;
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}
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// eslint-disable-next-line consistent-return
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return store
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.getIdentityKeyPair()
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.then(
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async (identityKey: KeyPairType | undefined) => {
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if (!identityKey) {
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throw new Error('rotateSignedPreKey: No identity key pair!');
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}
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return generateSignedPreKey(identityKey, signedKeyId);
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},
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() => {
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// We swallow any error here, because we don't want to get into
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// a loop of repeated retries.
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window.log.error(
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'Failed to get identity key. Canceling key rotation.'
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);
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return null;
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}
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)
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.then(async (res: CompatSignedPreKeyType | null) => {
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if (!res) {
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return null;
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}
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window.log.info('Saving new signed prekey', res.keyId);
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return Promise.all([
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window.textsecure.storage.put('signedKeyId', signedKeyId + 1),
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store.storeSignedPreKey(res.keyId, res.keyPair),
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server.setSignedPreKey({
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keyId: res.keyId,
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publicKey: res.keyPair.pubKey,
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signature: res.signature,
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}),
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])
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.then(async () => {
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const confirmed = true;
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window.log.info('Confirming new signed prekey', res.keyId);
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return Promise.all([
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window.textsecure.storage.remove('signedKeyRotationRejected'),
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store.storeSignedPreKey(res.keyId, res.keyPair, confirmed),
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]);
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})
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.then(cleanSignedPreKeys);
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})
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.catch(async (e: Error) => {
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window.log.error(
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'rotateSignedPrekey error:',
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e && e.stack ? e.stack : e
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);
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if (
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e instanceof Error &&
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e.name === 'HTTPError' &&
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e.code &&
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e.code >= 400 &&
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e.code <= 599
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) {
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const rejections =
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1 + window.textsecure.storage.get('signedKeyRotationRejected', 0);
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await window.textsecure.storage.put(
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'signedKeyRotationRejected',
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rejections
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);
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window.log.error('Signed key rotation rejected count:', rejections);
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} else {
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throw e;
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}
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});
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});
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}
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async queueTask(task: () => Promise<any>) {
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this.pendingQueue = this.pendingQueue || new PQueue({ concurrency: 1 });
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const taskWithTimeout = createTaskWithTimeout(task, 'AccountManager task');
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return this.pendingQueue.add(taskWithTimeout);
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}
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async cleanSignedPreKeys() {
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const store = window.textsecure.storage.protocol;
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const allKeys = await store.loadSignedPreKeys();
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allKeys.sort((a, b) => (b.created_at || 0) - (a.created_at || 0));
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const confirmed = allKeys.filter(key => key.confirmed);
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const unconfirmed = allKeys.filter(key => !key.confirmed);
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const recent = allKeys[0] ? allKeys[0].keyId : 'none';
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const recentConfirmed = confirmed[0] ? confirmed[0].keyId : 'none';
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const recentUnconfirmed = unconfirmed[0] ? unconfirmed[0].keyId : 'none';
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window.log.info(`cleanSignedPreKeys: Most recent signed key: ${recent}`);
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window.log.info(
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`cleanSignedPreKeys: Most recent confirmed signed key: ${recentConfirmed}`
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);
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window.log.info(
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`cleanSignedPreKeys: Most recent unconfirmed signed key: ${recentUnconfirmed}`
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);
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window.log.info(
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'cleanSignedPreKeys: Total signed key count:',
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allKeys.length,
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'-',
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confirmed.length,
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'confirmed'
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);
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// Keep MINIMUM_SIGNED_PREKEYS keys, then drop if older than ARCHIVE_AGE
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await Promise.all(
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allKeys.map(async (key, index) => {
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if (index < MINIMUM_SIGNED_PREKEYS) {
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return;
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}
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const createdAt = key.created_at || 0;
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if (isOlderThan(createdAt, ARCHIVE_AGE)) {
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const timestamp = new Date(createdAt).toJSON();
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const confirmedText = key.confirmed ? ' (confirmed)' : '';
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window.log.info(
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`Removing signed prekey: ${key.keyId} with timestamp ${timestamp}${confirmedText}`
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);
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await store.removeSignedPreKey(key.keyId);
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}
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})
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);
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}
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async createAccount(
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number: string,
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verificationCode: string,
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identityKeyPair: KeyPairType,
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profileKey: ArrayBuffer | undefined,
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deviceName: string | null,
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userAgent?: string | null,
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readReceipts?: boolean | null,
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options: { accessKey?: ArrayBuffer; uuid?: string } = {}
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): Promise<void> {
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const { accessKey, uuid } = options;
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let password = btoa(utils.getString(getRandomBytes(16)));
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password = password.substring(0, password.length - 2);
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const registrationId = generateRegistrationId();
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const previousNumber = getIdentifier(
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window.textsecure.storage.get('number_id')
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);
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const previousUuid = getIdentifier(
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window.textsecure.storage.get('uuid_id')
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);
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let encryptedDeviceName;
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if (deviceName) {
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encryptedDeviceName = await this.encryptDeviceName(
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deviceName,
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identityKeyPair
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);
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await this.deviceNameIsEncrypted();
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}
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window.log.info(
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`createAccount: Number is ${number}, password has length: ${
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password ? password.length : 'none'
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}`
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);
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const response = await this.server.confirmCode(
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number,
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verificationCode,
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password,
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registrationId,
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encryptedDeviceName,
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{ accessKey, uuid }
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);
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const uuidChanged = previousUuid && uuid && previousUuid !== uuid;
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// We only consider the number changed if we didn't have a UUID before
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const numberChanged =
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!previousUuid && previousNumber && previousNumber !== number;
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if (uuidChanged || numberChanged) {
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if (uuidChanged) {
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window.log.warn(
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'New uuid is different from old uuid; deleting all previous data'
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);
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}
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if (numberChanged) {
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window.log.warn(
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'New number is different from old number; deleting all previous data'
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);
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}
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try {
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await window.textsecure.storage.protocol.removeAllData();
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window.log.info('Successfully deleted previous data');
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} catch (error) {
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window.log.error(
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'Something went wrong deleting data from previous number',
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error && error.stack ? error.stack : error
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);
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}
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}
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await Promise.all([
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window.textsecure.storage.remove('identityKey'),
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window.textsecure.storage.user.removeCredentials(),
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window.textsecure.storage.remove('registrationId'),
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window.textsecure.storage.remove('regionCode'),
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window.textsecure.storage.remove('userAgent'),
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window.textsecure.storage.remove('profileKey'),
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window.textsecure.storage.remove('read-receipt-setting'),
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]);
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// `setCredentials` needs to be called
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// before `saveIdentifyWithAttributes` since `saveIdentityWithAttributes`
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// indirectly calls `ConversationController.getConverationId()` which
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// initializes the conversation for the given number (our number) which
|
|
// calls out to the user storage API to get the stored UUID and number
|
|
// information.
|
|
await window.textsecure.storage.user.setCredentials({
|
|
uuid,
|
|
number,
|
|
deviceId: response.deviceId ?? 1,
|
|
deviceName: deviceName ?? undefined,
|
|
password,
|
|
});
|
|
|
|
// This needs to be done very early, because it changes how things are saved in the
|
|
// database. Your identity, for example, in the saveIdentityWithAttributes call
|
|
// below.
|
|
const conversationId = window.ConversationController.ensureContactIds({
|
|
e164: number,
|
|
uuid,
|
|
highTrust: true,
|
|
});
|
|
|
|
if (!conversationId) {
|
|
throw new Error('registrationDone: no conversationId!');
|
|
}
|
|
|
|
// update our own identity key, which may have changed
|
|
// if we're relinking after a reinstall on the master device
|
|
await window.textsecure.storage.protocol.saveIdentityWithAttributes(
|
|
uuid || number,
|
|
{
|
|
publicKey: identityKeyPair.pubKey,
|
|
firstUse: true,
|
|
timestamp: Date.now(),
|
|
verified: window.textsecure.storage.protocol.VerifiedStatus.VERIFIED,
|
|
nonblockingApproval: true,
|
|
}
|
|
);
|
|
|
|
await window.textsecure.storage.put('identityKey', identityKeyPair);
|
|
await window.textsecure.storage.put('registrationId', registrationId);
|
|
if (profileKey) {
|
|
await ourProfileKeyService.set(profileKey);
|
|
}
|
|
if (userAgent) {
|
|
await window.textsecure.storage.put('userAgent', userAgent);
|
|
}
|
|
|
|
await window.textsecure.storage.put(
|
|
'read-receipt-setting',
|
|
Boolean(readReceipts)
|
|
);
|
|
|
|
const regionCode = window.libphonenumber.util.getRegionCodeForNumber(
|
|
number
|
|
);
|
|
await window.textsecure.storage.put('regionCode', regionCode);
|
|
await window.textsecure.storage.protocol.hydrateCaches();
|
|
}
|
|
|
|
async clearSessionsAndPreKeys() {
|
|
const store = window.textsecure.storage.protocol;
|
|
|
|
window.log.info('clearing all sessions, prekeys, and signed prekeys');
|
|
await Promise.all([
|
|
store.clearPreKeyStore(),
|
|
store.clearSignedPreKeysStore(),
|
|
store.clearSessionStore(),
|
|
]);
|
|
}
|
|
|
|
async getGroupCredentials(startDay: number, endDay: number) {
|
|
return this.server.getGroupCredentials(startDay, endDay);
|
|
}
|
|
|
|
// Takes the same object returned by generateKeys
|
|
async confirmKeys(keys: GeneratedKeysType) {
|
|
const store = window.textsecure.storage.protocol;
|
|
const key = keys.signedPreKey;
|
|
const confirmed = true;
|
|
|
|
if (!key) {
|
|
throw new Error('confirmKeys: signedPreKey is null');
|
|
}
|
|
|
|
window.log.info('confirmKeys: confirming key', key.keyId);
|
|
await store.storeSignedPreKey(key.keyId, key.keyPair, confirmed);
|
|
}
|
|
|
|
async generateKeys(count: number, providedProgressCallback?: Function) {
|
|
const progressCallback =
|
|
typeof providedProgressCallback === 'function'
|
|
? providedProgressCallback
|
|
: null;
|
|
const startId = window.textsecure.storage.get('maxPreKeyId', 1);
|
|
const signedKeyId = window.textsecure.storage.get('signedKeyId', 1);
|
|
|
|
if (typeof startId !== 'number') {
|
|
throw new Error('Invalid maxPreKeyId');
|
|
}
|
|
if (typeof signedKeyId !== 'number') {
|
|
throw new Error('Invalid signedKeyId');
|
|
}
|
|
|
|
const store = window.textsecure.storage.protocol;
|
|
return store.getIdentityKeyPair().then(async identityKey => {
|
|
if (!identityKey) {
|
|
throw new Error('generateKeys: No identity key pair!');
|
|
}
|
|
|
|
const result: any = {
|
|
preKeys: [],
|
|
identityKey: identityKey.pubKey,
|
|
};
|
|
const promises = [];
|
|
|
|
for (let keyId = startId; keyId < startId + count; keyId += 1) {
|
|
promises.push(
|
|
Promise.resolve(generatePreKey(keyId)).then(async res => {
|
|
await store.storePreKey(res.keyId, res.keyPair);
|
|
result.preKeys.push({
|
|
keyId: res.keyId,
|
|
publicKey: res.keyPair.pubKey,
|
|
});
|
|
if (progressCallback) {
|
|
progressCallback();
|
|
}
|
|
})
|
|
);
|
|
}
|
|
|
|
promises.push(
|
|
Promise.resolve(generateSignedPreKey(identityKey, signedKeyId)).then(
|
|
async res => {
|
|
await store.storeSignedPreKey(res.keyId, res.keyPair);
|
|
result.signedPreKey = {
|
|
keyId: res.keyId,
|
|
publicKey: res.keyPair.pubKey,
|
|
signature: res.signature,
|
|
// server.registerKeys doesn't use keyPair, confirmKeys does
|
|
keyPair: res.keyPair,
|
|
};
|
|
}
|
|
)
|
|
);
|
|
|
|
promises.push(
|
|
window.textsecure.storage.put('maxPreKeyId', startId + count)
|
|
);
|
|
promises.push(
|
|
window.textsecure.storage.put('signedKeyId', signedKeyId + 1)
|
|
);
|
|
|
|
return Promise.all(promises).then(async () =>
|
|
// This is primarily for the signed prekey summary it logs out
|
|
this.cleanSignedPreKeys().then(() => result as GeneratedKeysType)
|
|
);
|
|
});
|
|
}
|
|
|
|
async registrationDone() {
|
|
window.log.info('registration done');
|
|
this.dispatchEvent(new Event('registration'));
|
|
}
|
|
}
|