From 65cea42061a2b878a14a7f850d75fd937731b269 Mon Sep 17 00:00:00 2001
From: lovetox <philipp@hoerist.com>
Date: Sun, 21 Jun 2020 22:34:11 +0200
Subject: [PATCH] [omemo] Don't silently drop message on decryption error

Fixes #496
---
 omemo/backend/state.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/omemo/backend/state.py b/omemo/backend/state.py
index 3e61b66..ce3b099 100644
--- a/omemo/backend/state.py
+++ b/omemo/backend/state.py
@@ -148,7 +148,12 @@ class OmemoState(DeviceManager):
             self._log.debug("Decrypted Key Exchange Message")
             raise KeyExchangeMessage
 
-        result = aes_decrypt(key, omemo_message.iv, omemo_message.payload)
+        try:
+            result = aes_decrypt(key, omemo_message.iv, omemo_message.payload)
+        except Exception as error:
+            self._log.warning(error)
+            raise DecryptionFailed
+
         self._log.debug("Decrypted Message => %s", result)
         return result, fingerprint, trust