From eb50b8ebe4447cafe23d5f1d4ca9351e594e917e Mon Sep 17 00:00:00 2001
From: Tobias Fella <fella@posteo.de>
Date: Sat, 26 Feb 2022 22:22:51 +0100
Subject: Check that decrypted events are for the current room

---
 lib/room.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'lib')

diff --git a/lib/room.cpp b/lib/room.cpp
index ea9915c3..d0ac10f9 100644
--- a/lib/room.cpp
+++ b/lib/room.cpp
@@ -1487,7 +1487,13 @@ RoomEventPtr Room::decryptMessage(const EncryptedEvent& encryptedEvent)
         // qCWarning(E2EE) << "Encrypted message is empty";
         return {};
     }
-    return encryptedEvent.createDecrypted(decrypted);
+    auto decryptedEvent = encryptedEvent.createDecrypted(decrypted);
+    if (decryptedEvent->roomId() == id()) {
+        return decryptedEvent;
+    } else {
+        qCWarning(E2EE) << "Decrypted event" << encryptedEvent.id() << "not for this room; discarding.";
+        return nullptr;
+    }
 #endif // Quotient_E2EE_ENABLED
 }
 
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