e2ee: pass local and remote ids

currently unused, will allow moving to per-participant keys

JitsiConference.js

@@ -244,7 +244,10 @@ export default function JitsiConference(options) {
     this.maxFrameHeight = null;
 
     if (browser.supportsInsertableStreams()) {
-        this._e2eeCtx = new E2EEContext({ salt: this.options.name });
+        this._e2eeCtx = new E2EEContext({
+            myUserId: this.myUserId(),
+            salt: this.options.name
+        });
     }
 }
 
@@ -3448,7 +3451,7 @@ JitsiConference.prototype._setupReceiverE2EEForTrack = function(track) {
         const receiver = pc.findReceiverForTrack(track.track);
 
         if (receiver) {
-            this._e2eeCtx.handleReceiver(receiver, track.getType());
+            this._e2eeCtx.handleReceiver(receiver, track.getType(), track.id());
         } else {
             logger.warn(`Could not handle E2EE for remote ${track.getType()} track: receiver not found`);
         }

modules/e2ee/E2EEContext.js

@@ -32,6 +32,7 @@ export default class E2EEcontext {
      *        https://developer.mozilla.org/en-US/docs/Web/API/Pbkdf2Params
      *      this is easily available and the same for all participants.
      *      We currently do not enforce a minimum length of 16 bytes either.
+     * @param {string} options.myUserId- local client id. This is the local MUC resourcepart.
      */
     constructor(options) {
         this._options = options;
@@ -58,8 +59,9 @@ export default class E2EEcontext {
      *
      * @param {RTCRtpReceiver} receiver - The receiver which will get the decoding function injected.
      * @param {string} kind - The kind of track this receiver belongs to.
+     * @param {string} participantId - The (muc participant) id that this receiver belongs to.
      */
-    handleReceiver(receiver, kind) {
+    handleReceiver(receiver, kind, participantId) {
         if (receiver[kJitsiE2EE]) {
             return;
         }
@@ -71,7 +73,8 @@ export default class E2EEcontext {
         this._worker.postMessage({
             operation: 'decode',
             readableStream: receiverStreams.readableStream,
-            writableStream: receiverStreams.writableStream
+            writableStream: receiverStreams.writableStream,
+            participantId
         }, [ receiverStreams.readableStream, receiverStreams.writableStream ]);
     }
 
@@ -94,7 +97,8 @@ export default class E2EEcontext {
         this._worker.postMessage({
             operation: 'encode',
             readableStream: senderStreams.readableStream,
-            writableStream: senderStreams.writableStream
+            writableStream: senderStreams.writableStream,
+            participantId: this._options.myUserId
         }, [ senderStreams.readableStream, senderStreams.writableStream ]);
     }