EventIndex: Store and restore the encryption info for encrypted events.

src/Searching.js

@@ -107,6 +107,26 @@ async function localSearch(searchTerm, roomId = undefined) {
     const result = MatrixClientPeg.get()._processRoomEventsSearch(
         emptyResult, response);
 
+    // Restore our encryption info so we can properly re-verify the events.
+    for (let i = 0; i < result.results.length; i++) {
+        const timeline = result.results[i].context.getTimeline();
+
+        for (let j = 0; j < timeline.length; j++) {
+            const ev = timeline[j];
+            if (ev.event.curve25519Key) {
+                ev.makeEncrypted(
+                    "m.room.encrypted",
+                    { algorithm: ev.event.algorithm },
+                    ev.event.curve25519Key,
+                    ev.event.ed25519Key,
+                );
+                ev._forwardingCurve25519KeyChain = ev.event.forwardingCurve25519KeyChain;
+
+                delete ev.event.curve25519Key;
+            }
+        }
+    }
+
     return result;
 }