704 lines
20 KiB
TypeScript
704 lines
20 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 guard-for-in */
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/* eslint-disable no-restricted-syntax */
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/* eslint-disable class-methods-use-this */
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/* eslint-disable @typescript-eslint/no-explicit-any */
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/* eslint-disable more/no-then */
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/* eslint-disable no-param-reassign */
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import { reject } from 'lodash';
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import { z } from 'zod';
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import {
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CiphertextMessageType,
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CiphertextMessage,
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PlaintextContent,
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ProtocolAddress,
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sealedSenderEncrypt,
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SenderCertificate,
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signalEncrypt,
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UnidentifiedSenderMessageContent,
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} from '@signalapp/signal-client';
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import { WebAPIType } from './WebAPI';
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import { SendMetadataType, SendOptionsType } from './SendMessage';
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import {
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OutgoingIdentityKeyError,
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OutgoingMessageError,
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SendMessageNetworkError,
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SendMessageChallengeError,
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UnregisteredUserError,
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} from './Errors';
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import { CallbackResultType, CustomError } from './Types.d';
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import { isValidNumber } from '../types/PhoneNumber';
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import { Sessions, IdentityKeys } from '../LibSignalStores';
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import { typedArrayToArrayBuffer as toArrayBuffer } from '../Crypto';
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import { updateConversationsWithUuidLookup } from '../updateConversationsWithUuidLookup';
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import { getKeysForIdentifier } from './getKeysForIdentifier';
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import { SignalService as Proto } from '../protobuf';
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export const enum SenderCertificateMode {
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WithE164,
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WithoutE164,
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}
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export type SendLogCallbackType = (options: {
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identifier: string;
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deviceIds: Array<number>;
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}) => Promise<void>;
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type SendMetadata = {
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type: number;
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destinationDeviceId: number;
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destinationRegistrationId: number;
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content: string;
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};
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export const serializedCertificateSchema = z
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.object({
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expires: z.number().optional(),
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serialized: z.instanceof(ArrayBuffer),
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})
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.nonstrict();
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export type SerializedCertificateType = z.infer<
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typeof serializedCertificateSchema
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>;
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type OutgoingMessageOptionsType = SendOptionsType & {
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online?: boolean;
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};
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function ciphertextMessageTypeToEnvelopeType(type: number) {
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if (type === CiphertextMessageType.PreKey) {
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return Proto.Envelope.Type.PREKEY_BUNDLE;
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}
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if (type === CiphertextMessageType.Whisper) {
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return Proto.Envelope.Type.CIPHERTEXT;
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}
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if (type === CiphertextMessageType.Plaintext) {
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return Proto.Envelope.Type.PLAINTEXT_CONTENT;
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}
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throw new Error(
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`ciphertextMessageTypeToEnvelopeType: Unrecognized type ${type}`
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);
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}
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function getPaddedMessageLength(messageLength: number): number {
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const messageLengthWithTerminator = messageLength + 1;
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let messagePartCount = Math.floor(messageLengthWithTerminator / 160);
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if (messageLengthWithTerminator % 160 !== 0) {
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messagePartCount += 1;
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}
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return messagePartCount * 160;
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}
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export function padMessage(messageBuffer: Uint8Array): Uint8Array {
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const plaintext = new Uint8Array(
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getPaddedMessageLength(messageBuffer.byteLength + 1) - 1
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);
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plaintext.set(messageBuffer);
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plaintext[messageBuffer.byteLength] = 0x80;
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return plaintext;
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}
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export default class OutgoingMessage {
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server: WebAPIType;
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timestamp: number;
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identifiers: Array<string>;
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message: Proto.Content | PlaintextContent;
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callback: (result: CallbackResultType) => void;
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plaintext?: Uint8Array;
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identifiersCompleted: number;
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errors: Array<CustomError>;
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successfulIdentifiers: Array<string>;
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failoverIdentifiers: Array<string>;
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unidentifiedDeliveries: Array<string>;
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sendMetadata?: SendMetadataType;
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online?: boolean;
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groupId?: string;
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contentHint: number;
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recipients: Record<string, Array<number>>;
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sendLogCallback?: SendLogCallbackType;
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constructor({
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callback,
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contentHint,
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groupId,
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identifiers,
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message,
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options,
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sendLogCallback,
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server,
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timestamp,
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}: {
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callback: (result: CallbackResultType) => void;
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contentHint: number;
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groupId: string | undefined;
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identifiers: Array<string>;
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message: Proto.Content | Proto.DataMessage | PlaintextContent;
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options?: OutgoingMessageOptionsType;
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sendLogCallback?: SendLogCallbackType;
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server: WebAPIType;
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timestamp: number;
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}) {
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if (message instanceof Proto.DataMessage) {
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const content = new Proto.Content();
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content.dataMessage = message;
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// eslint-disable-next-line no-param-reassign
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this.message = content;
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} else {
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this.message = message;
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}
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this.server = server;
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this.timestamp = timestamp;
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this.identifiers = identifiers;
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this.contentHint = contentHint;
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this.groupId = groupId;
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this.callback = callback;
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this.identifiersCompleted = 0;
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this.errors = [];
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this.successfulIdentifiers = [];
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this.failoverIdentifiers = [];
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this.unidentifiedDeliveries = [];
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this.recipients = {};
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this.sendLogCallback = sendLogCallback;
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this.sendMetadata = options?.sendMetadata;
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this.online = options?.online;
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}
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numberCompleted(): void {
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this.identifiersCompleted += 1;
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if (this.identifiersCompleted >= this.identifiers.length) {
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const contentProto = this.getContentProtoBytes();
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const { timestamp, contentHint, recipients } = this;
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this.callback({
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successfulIdentifiers: this.successfulIdentifiers,
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failoverIdentifiers: this.failoverIdentifiers,
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errors: this.errors,
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unidentifiedDeliveries: this.unidentifiedDeliveries,
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contentHint,
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recipients,
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contentProto,
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timestamp,
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});
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}
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}
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registerError(
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identifier: string,
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reason: string,
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providedError?: Error
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): void {
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let error = providedError;
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if (!error || (error.name === 'HTTPError' && error.code !== 404)) {
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if (error && error.code === 428) {
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error = new SendMessageChallengeError(identifier, error);
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} else {
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error = new OutgoingMessageError(identifier, null, null, error);
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}
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}
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error.reason = reason;
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error.stackForLog = providedError ? providedError.stack : undefined;
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this.errors[this.errors.length] = error;
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this.numberCompleted();
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}
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reloadDevicesAndSend(
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identifier: string,
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recurse?: boolean
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): () => Promise<void> {
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return async () => {
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const deviceIds = await window.textsecure.storage.protocol.getDeviceIds(
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identifier
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);
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if (deviceIds.length === 0) {
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this.registerError(
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identifier,
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'reloadDevicesAndSend: Got empty device list when loading device keys',
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undefined
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);
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return undefined;
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}
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return this.doSendMessage(identifier, deviceIds, recurse);
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};
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}
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async getKeysForIdentifier(
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identifier: string,
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updateDevices?: Array<number>
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): Promise<void | Array<void | null>> {
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const { sendMetadata } = this;
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const info =
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sendMetadata && sendMetadata[identifier]
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? sendMetadata[identifier]
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: { accessKey: undefined };
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const { accessKey } = info;
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try {
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const { accessKeyFailed } = await getKeysForIdentifier(
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identifier,
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this.server,
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updateDevices,
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accessKey
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);
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if (accessKeyFailed && !this.failoverIdentifiers.includes(identifier)) {
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this.failoverIdentifiers.push(identifier);
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}
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} catch (error) {
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if (error?.message?.includes('untrusted identity for address')) {
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error.timestamp = this.timestamp;
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}
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throw error;
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}
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}
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async transmitMessage(
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identifier: string,
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jsonData: Array<unknown>,
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timestamp: number,
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{ accessKey }: { accessKey?: string } = {}
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): Promise<void> {
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let promise;
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if (accessKey) {
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promise = this.server.sendMessagesUnauth(
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identifier,
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jsonData,
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timestamp,
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this.online,
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{ accessKey }
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);
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} else {
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promise = this.server.sendMessages(
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identifier,
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jsonData,
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timestamp,
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this.online
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);
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}
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return promise.catch(e => {
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if (e.name === 'HTTPError' && e.code !== 409 && e.code !== 410) {
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// 409 and 410 should bubble and be handled by doSendMessage
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// 404 should throw UnregisteredUserError
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// 428 should throw SendMessageChallengeError
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// all other network errors can be retried later.
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if (e.code === 404) {
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throw new UnregisteredUserError(identifier, e);
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}
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if (e.code === 428) {
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throw new SendMessageChallengeError(identifier, e);
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}
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throw new SendMessageNetworkError(identifier, jsonData, e);
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}
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throw e;
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});
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}
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getPlaintext(): ArrayBuffer {
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if (!this.plaintext) {
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const { message } = this;
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if (message instanceof Proto.Content) {
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this.plaintext = padMessage(Proto.Content.encode(message).finish());
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} else {
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this.plaintext = message.serialize();
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}
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}
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return toArrayBuffer(this.plaintext);
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}
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getContentProtoBytes(): Uint8Array | undefined {
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if (this.message instanceof Proto.Content) {
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return new Uint8Array(Proto.Content.encode(this.message).finish());
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}
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return undefined;
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}
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async getCiphertextMessage({
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identityKeyStore,
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protocolAddress,
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sessionStore,
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}: {
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identityKeyStore: IdentityKeys;
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protocolAddress: ProtocolAddress;
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sessionStore: Sessions;
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}): Promise<CiphertextMessage> {
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const { message } = this;
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if (message instanceof Proto.Content) {
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return signalEncrypt(
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Buffer.from(this.getPlaintext()),
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protocolAddress,
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sessionStore,
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identityKeyStore
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);
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}
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return message.asCiphertextMessage();
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}
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async doSendMessage(
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identifier: string,
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deviceIds: Array<number>,
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recurse?: boolean
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): Promise<void> {
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const { sendMetadata } = this;
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const { accessKey, senderCertificate } = sendMetadata?.[identifier] || {};
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if (accessKey && !senderCertificate) {
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window.log.warn(
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'OutgoingMessage.doSendMessage: accessKey was provided, but senderCertificate was not'
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);
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}
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const sealedSender = Boolean(accessKey && senderCertificate);
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// We don't send to ourselves unless sealedSender is enabled
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const ourNumber = window.textsecure.storage.user.getNumber();
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const ourUuid = window.textsecure.storage.user.getUuid();
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const ourDeviceId = window.textsecure.storage.user.getDeviceId();
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if ((identifier === ourNumber || identifier === ourUuid) && !sealedSender) {
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deviceIds = reject(
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deviceIds,
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deviceId =>
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// because we store our own device ID as a string at least sometimes
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deviceId === ourDeviceId ||
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(typeof ourDeviceId === 'string' &&
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deviceId === parseInt(ourDeviceId, 10))
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);
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}
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const sessionStore = new Sessions();
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const identityKeyStore = new IdentityKeys();
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return Promise.all(
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deviceIds.map(async destinationDeviceId => {
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const address = `${identifier}.${destinationDeviceId}`;
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return window.textsecure.storage.protocol.enqueueSessionJob<SendMetadata>(
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address,
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async () => {
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const protocolAddress = ProtocolAddress.new(
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identifier,
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destinationDeviceId
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);
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const activeSession = await sessionStore.getSession(
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protocolAddress
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);
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if (!activeSession) {
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throw new Error(
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'OutgoingMessage.doSendMessage: No active sesssion!'
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);
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}
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const destinationRegistrationId = activeSession.remoteRegistrationId();
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if (sealedSender && senderCertificate) {
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const ciphertextMessage = await this.getCiphertextMessage({
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identityKeyStore,
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protocolAddress,
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sessionStore,
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});
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const certificate = SenderCertificate.deserialize(
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Buffer.from(senderCertificate.serialized)
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);
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const groupIdBuffer = this.groupId
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? Buffer.from(this.groupId, 'base64')
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: null;
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const content = UnidentifiedSenderMessageContent.new(
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ciphertextMessage,
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certificate,
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this.contentHint,
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groupIdBuffer
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);
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const buffer = await sealedSenderEncrypt(
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content,
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protocolAddress,
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identityKeyStore
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);
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return {
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type: Proto.Envelope.Type.UNIDENTIFIED_SENDER,
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destinationDeviceId,
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destinationRegistrationId,
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content: buffer.toString('base64'),
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};
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}
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const ciphertextMessage = await this.getCiphertextMessage({
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identityKeyStore,
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protocolAddress,
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sessionStore,
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});
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const type = ciphertextMessageTypeToEnvelopeType(
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ciphertextMessage.type()
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);
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const content = ciphertextMessage.serialize().toString('base64');
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return {
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type,
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destinationDeviceId,
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destinationRegistrationId,
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content,
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};
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}
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);
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})
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)
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.then(async (jsonData: Array<SendMetadata>) => {
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if (sealedSender) {
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return this.transmitMessage(identifier, jsonData, this.timestamp, {
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accessKey,
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}).then(
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() => {
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this.recipients[identifier] = deviceIds;
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this.unidentifiedDeliveries.push(identifier);
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this.successfulIdentifiers.push(identifier);
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this.numberCompleted();
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if (this.sendLogCallback) {
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this.sendLogCallback({
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identifier,
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deviceIds,
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});
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} else if (this.successfulIdentifiers.length > 1) {
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window.log.warn(
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`OutgoingMessage.doSendMessage: no sendLogCallback provided for message ${this.timestamp}, but multiple recipients`
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);
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}
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},
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async (error: Error) => {
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if (error.code === 401 || error.code === 403) {
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if (this.failoverIdentifiers.indexOf(identifier) === -1) {
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this.failoverIdentifiers.push(identifier);
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}
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// This ensures that we don't hit this codepath the next time through
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if (sendMetadata) {
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delete sendMetadata[identifier];
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}
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return this.doSendMessage(identifier, deviceIds, recurse);
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}
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throw error;
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}
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);
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}
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return this.transmitMessage(identifier, jsonData, this.timestamp).then(
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() => {
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this.successfulIdentifiers.push(identifier);
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this.recipients[identifier] = deviceIds;
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this.numberCompleted();
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if (this.sendLogCallback) {
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this.sendLogCallback({
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identifier,
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deviceIds,
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});
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} else if (this.successfulIdentifiers.length > 1) {
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window.log.warn(
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`OutgoingMessage.doSendMessage: no sendLogCallback provided for message ${this.timestamp}, but multiple recipients`
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);
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}
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}
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);
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})
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.catch(async error => {
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if (
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error instanceof Error &&
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error.name === 'HTTPError' &&
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(error.code === 410 || error.code === 409)
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) {
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if (!recurse) {
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this.registerError(
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identifier,
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'Hit retry limit attempting to reload device list',
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error
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);
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return undefined;
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}
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let p: Promise<any> = Promise.resolve();
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if (error.code === 409) {
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p = this.removeDeviceIdsForIdentifier(
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identifier,
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error.response.extraDevices || []
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);
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} else {
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p = Promise.all(
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error.response.staleDevices.map(async (deviceId: number) => {
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await window.textsecure.storage.protocol.archiveSession(
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`${identifier}.${deviceId}`
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);
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})
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);
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}
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return p.then(async () => {
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const resetDevices =
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error.code === 410
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? error.response.staleDevices
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: error.response.missingDevices;
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return this.getKeysForIdentifier(identifier, resetDevices).then(
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// We continue to retry as long as the error code was 409; the assumption is
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// that we'll request new device info and the next request will succeed.
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this.reloadDevicesAndSend(identifier, error.code === 409)
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);
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});
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}
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if (error?.message?.includes('untrusted identity for address')) {
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// eslint-disable-next-line no-param-reassign
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error.timestamp = this.timestamp;
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window.log.error(
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'Got "key changed" error from encrypt - no identityKey for application layer',
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identifier,
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deviceIds
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);
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window.log.info('closing all sessions for', identifier);
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window.textsecure.storage.protocol
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.archiveAllSessions(identifier)
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.then(
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|
() => {
|
|
throw error;
|
|
},
|
|
innerError => {
|
|
window.log.error(
|
|
`doSendMessage: Error closing sessions: ${innerError.stack}`
|
|
);
|
|
throw error;
|
|
}
|
|
);
|
|
}
|
|
|
|
this.registerError(
|
|
identifier,
|
|
'Failed to create or send message',
|
|
error
|
|
);
|
|
|
|
return undefined;
|
|
});
|
|
}
|
|
|
|
async removeDeviceIdsForIdentifier(
|
|
identifier: string,
|
|
deviceIdsToRemove: Array<number>
|
|
): Promise<void> {
|
|
await Promise.all(
|
|
deviceIdsToRemove.map(async deviceId => {
|
|
await window.textsecure.storage.protocol.archiveSession(
|
|
`${identifier}.${deviceId}`
|
|
);
|
|
})
|
|
);
|
|
}
|
|
|
|
async sendToIdentifier(providedIdentifier: string): Promise<void> {
|
|
let identifier = providedIdentifier;
|
|
try {
|
|
if (window.isValidGuid(identifier)) {
|
|
// We're good!
|
|
} else if (isValidNumber(identifier)) {
|
|
if (!window.textsecure.messaging) {
|
|
throw new Error(
|
|
'sendToIdentifier: window.textsecure.messaging is not available!'
|
|
);
|
|
}
|
|
|
|
try {
|
|
await updateConversationsWithUuidLookup({
|
|
conversationController: window.ConversationController,
|
|
conversations: [
|
|
window.ConversationController.getOrCreate(identifier, 'private'),
|
|
],
|
|
messaging: window.textsecure.messaging,
|
|
});
|
|
|
|
const uuid = window.ConversationController.get(identifier)?.get(
|
|
'uuid'
|
|
);
|
|
if (!uuid) {
|
|
throw new UnregisteredUserError(
|
|
identifier,
|
|
new Error('User is not registered')
|
|
);
|
|
}
|
|
identifier = uuid;
|
|
} catch (error) {
|
|
window.log.error(
|
|
`sendToIdentifier: Failed to fetch UUID for identifier ${identifier}`,
|
|
error && error.stack ? error.stack : error
|
|
);
|
|
}
|
|
} else {
|
|
throw new Error(
|
|
`sendToIdentifier: identifier ${identifier} was neither a UUID or E164`
|
|
);
|
|
}
|
|
|
|
const deviceIds = await window.textsecure.storage.protocol.getDeviceIds(
|
|
identifier
|
|
);
|
|
if (deviceIds.length === 0) {
|
|
await this.getKeysForIdentifier(identifier);
|
|
}
|
|
await this.reloadDevicesAndSend(identifier, true)();
|
|
} catch (error) {
|
|
if (error?.message?.includes('untrusted identity for address')) {
|
|
const newError = new OutgoingIdentityKeyError(
|
|
identifier,
|
|
error.originalMessage,
|
|
error.timestamp,
|
|
error.identityKey
|
|
);
|
|
this.registerError(identifier, 'Untrusted identity', newError);
|
|
} else {
|
|
this.registerError(
|
|
identifier,
|
|
`Failed to retrieve new device keys for identifier ${identifier}`,
|
|
error
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|