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83 lines
3.3 KiB
TypeScript
83 lines
3.3 KiB
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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Copyright 2021 The Matrix.org Foundation C.I.C.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
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Please see LICENSE files in the repository root for full details.
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*/
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import { ClientStoppedError, MatrixClient, Room } from "matrix-js-sdk/src/matrix";
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import { logger } from "matrix-js-sdk/src/logger";
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import DMRoomMap from "./DMRoomMap";
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import { asyncSome } from "./arrays";
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export enum E2EStatus {
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Warning = "warning",
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Verified = "verified",
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Normal = "normal",
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}
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export async function shieldStatusForRoom(client: MatrixClient, room: Room): Promise<E2EStatus> {
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const crypto = client.getCrypto();
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if (!crypto) {
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return E2EStatus.Warning;
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}
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try {
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const members = (await room.getEncryptionTargetMembers()).map(({ userId }) => userId);
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const inDMMap = !!DMRoomMap.shared().getUserIdForRoomId(room.roomId);
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const verified: string[] = [];
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const unverified: string[] = [];
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for (const userId of members) {
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if (userId === client.getUserId()) continue;
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const userTrust = await crypto.getUserVerificationStatus(userId);
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/* Alarm if any unverified users were verified before. */
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if (userTrust.wasCrossSigningVerified() && !userTrust.isCrossSigningVerified()) {
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return E2EStatus.Warning;
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}
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(userTrust.isCrossSigningVerified() ? verified : unverified).push(userId);
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}
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/* Check all verified user devices. */
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/* Don't alarm if no other users are verified */
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const includeUser =
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(verified.length > 0 && // Don't alarm for self in rooms where nobody else is verified
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!inDMMap && // Don't alarm for self in DMs with other users
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members.length !== 2) || // Don't alarm for self in 1:1 chats with other users
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members.length === 1; // Do alarm for self if we're alone in a room
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const targets = includeUser ? [...verified, client.getUserId()!] : verified;
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const devicesByUser = await crypto.getUserDeviceInfo(targets);
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for (const userId of targets) {
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const devices = devicesByUser.get(userId);
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if (!devices) {
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// getUserDeviceInfo returned nothing about this user, which means we know nothing about their device list.
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// That seems odd, so treat it as a warning.
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logger.warn(`No device info for user ${userId}`);
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return E2EStatus.Warning;
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}
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const anyDeviceNotVerified = await asyncSome(devices.keys(), async (deviceId) => {
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const verificationStatus = await crypto.getDeviceVerificationStatus(userId, deviceId);
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return !verificationStatus?.isVerified();
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});
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if (anyDeviceNotVerified) {
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return E2EStatus.Warning;
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}
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}
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return unverified.length === 0 ? E2EStatus.Verified : E2EStatus.Normal;
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} catch (e) {
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if (!(e instanceof ClientStoppedError)) {
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throw e;
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}
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// The client has been stopped while we were figuring out what to do. Catch the exception to stop it being
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// logged. It probably doesn't really matter what we return.
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logger.warn("shieldStatusForRoom: client stopped");
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return E2EStatus.Normal;
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}
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}
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