Project HPS, first pass

conference.js

      */
     localVideo: null,
 
+    /**
+     * The key used for End-To-End Encryption.
+     */
+    e2eeKey: undefined,
+
     /**
      * Creates local media tracks and connects to a room. Will show error
      * dialogs in case accessing the local microphone and/or camera failed. Will
     init(options) {
         this.roomName = options.roomName;
 
+        window.addEventListener('hashchange', this.onHashChange.bind(this), false);
+
         return (
 
             // Initialize the device list first. This way, when creating tracks
         }));
     },
 
+    /**
+     * Handled location hash change events.
+     */
+    onHashChange() {
+        const items = {};
+        const parts = window.location.hash.substr(1).split('&');
+
+        for (const part of parts) {
+            const param = part.split('=');
+            const key = param[0];
+
+            if (!key) {
+                continue; // eslint-disable-line no-continue
+            }
+
+            items[key] = param[1];
+        }
+
+        this.e2eeKey = items.e2eekey;
+
+        logger.debug(`New E2EE key: ${this.e2eeKey}`);
+
+        this._room.setE2EEKey(this.e2eeKey);
+    },
+
     /**
      * Exposes a Command(s) API on this instance. It is necessitated by (1) the
      * desire to keep room private to this instance and (2) the need of other