Add config option for e2e group call signalling #2492
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So the reason I didn't do it per-call or anywhere in the signalling is because that then allows the server to do a downgrade attack. This feels a bit harder to force clients to downgrade to not using encryption. |
Sorry, I am not very familiar with this, so I am not seeing how exactly this should happen; though my main concern now is element-hq/element-call#438 (comment) |
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So if we encode whether the call should be encrypted anywhere in the call state event, the server will be able to change it (or serve a slightly modified state event down the sync stream to a client) to make clients disable encryption. The the HS admin can intercept the traffic and spy on the call. |
SimonBrandner
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Jul 5, 2022
su-ex
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Nov 25, 2022
* Make calls go back to 'connecting' state when media lost ([\matrix-org#2880](matrix-org#2880)). * Add ability to send unthreaded receipt ([\matrix-org#2878](matrix-org#2878)). * Add way to abort search requests ([\matrix-org#2877](matrix-org#2877)). * sliding sync: add custom room subscriptions support ([\matrix-org#2834](matrix-org#2834)). * webrtc: add advanced audio settings ([\matrix-org#2434](matrix-org#2434)). Contributed by @MrAnno. * Add support for group calls using MSC3401 ([\matrix-org#2553](matrix-org#2553)). * Make the js-sdk conform to tsc --strict ([\matrix-org#2835](matrix-org#2835)). Fixes matrix-org#2112 matrix-org#2116 and matrix-org#2124. * Let leave requests outlive the window ([\matrix-org#2815](matrix-org#2815)). Fixes element-hq/element-call#639. * Add event and message capabilities to RoomWidgetClient ([\matrix-org#2797](matrix-org#2797)). * Misc fixes for group call widgets ([\matrix-org#2657](matrix-org#2657)). * Support nested Matrix clients via the widget API ([\matrix-org#2473](matrix-org#2473)). * Set max average bitrate on PTT calls ([\matrix-org#2499](matrix-org#2499)). Fixes element-hq/element-call#440. * Add config option for e2e group call signalling ([\matrix-org#2492](matrix-org#2492)). * Enable DTX on audio tracks in calls ([\matrix-org#2482](matrix-org#2482)). * Don't ignore call member events with a distant future expiration date ([\matrix-org#2466](matrix-org#2466)). * Expire call member state events after 1 hour ([\matrix-org#2446](matrix-org#2446)). * Emit unknown device errors for group call participants without e2e ([\matrix-org#2447](matrix-org#2447)). * Mute disconnected peers in PTT mode ([\matrix-org#2421](matrix-org#2421)). * Add support for sending encrypted to-device events with OLM ([\matrix-org#2322](matrix-org#2322)). Contributed by @robertlong. * Support for PTT group call mode ([\matrix-org#2338](matrix-org#2338)). * Fix registration add phone number not working ([\matrix-org#2876](matrix-org#2876)). Contributed by @bagvand. * Use an underride rule for Element Call notifications ([\matrix-org#2873](matrix-org#2873)). Fixes element-hq/element-web#23691. * Fixes unwanted highlight notifications with encrypted threads ([\matrix-org#2862](matrix-org#2862)). * Extra insurance that we don't mix events in the wrong timelines - v2 ([\matrix-org#2856](matrix-org#2856)). Contributed by @MadLittleMods. * Hide pending events in thread timelines ([\matrix-org#2843](matrix-org#2843)). Fixes element-hq/element-web#23684. * Fix pagination token tracking for mixed room timelines ([\matrix-org#2855](matrix-org#2855)). Fixes element-hq/element-web#23695. * Extra insurance that we don't mix events in the wrong timelines ([\matrix-org#2848](matrix-org#2848)). Contributed by @MadLittleMods. * Do not freeze state in `initialiseState()` ([\matrix-org#2846](matrix-org#2846)). * Don't remove our own member for a split second when entering a call ([\matrix-org#2844](matrix-org#2844)). * Resolve races between `initLocalCallFeed` and `leave` ([\matrix-org#2826](matrix-org#2826)). * Add throwOnFail to groupCall.setScreensharingEnabled ([\matrix-org#2787](matrix-org#2787)). * Fix connectivity regressions ([\matrix-org#2780](matrix-org#2780)). * Fix screenshare failing after several attempts ([\matrix-org#2771](matrix-org#2771)). Fixes element-hq/element-call#625. * Don't block muting/unmuting on network requests ([\matrix-org#2754](matrix-org#2754)). Fixes element-hq/element-call#592. * Fix ICE restarts ([\matrix-org#2702](matrix-org#2702)). * Target widget actions at a specific room ([\matrix-org#2670](matrix-org#2670)). * Add tests for ice candidate sending ([\matrix-org#2674](matrix-org#2674)). * Prevent exception when muting ([\matrix-org#2667](matrix-org#2667)). Fixes element-hq/element-call#578. * Fix race in creating calls ([\matrix-org#2662](matrix-org#2662)). * Add client.waitUntilRoomReadyForGroupCalls() ([\matrix-org#2641](matrix-org#2641)). * Wait for client to start syncing before making group calls ([\matrix-org#2632](matrix-org#2632)). Fixes matrix-org#2589. * Add GroupCallEventHandlerEvent.Room ([\matrix-org#2631](matrix-org#2631)). * Add missing events from reemitter to GroupCall ([\matrix-org#2527](matrix-org#2527)). Contributed by @toger5. * Prevent double mute status changed events ([\matrix-org#2502](matrix-org#2502)). * Don't mute the remote side immediately in PTT calls ([\matrix-org#2487](matrix-org#2487)). Fixes element-hq/element-call#425. * Fix some MatrixCall leaks and use a shared AudioContext ([\matrix-org#2484](matrix-org#2484)). Fixes element-hq/element-call#412. * Don't block muting on determining whether the device exists ([\matrix-org#2461](matrix-org#2461)). * Only clone streams on Safari ([\matrix-org#2450](matrix-org#2450)). Fixes element-hq/element-call#267. * Set PTT mode on call correctly ([\matrix-org#2445](matrix-org#2445)). Fixes element-hq/element-call#382. * Wait for mute event to send in PTT mode ([\matrix-org#2401](matrix-org#2401)). * Handle other members having no e2e keys ([\matrix-org#2383](matrix-org#2383)). Fixes element-hq/element-call#338. * Fix races when muting/unmuting ([\matrix-org#2370](matrix-org#2370)).
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