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fix: Handle duplicate indexes properly

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Sorunome 2020-09-10 11:24:37 +02:00 committed by Christian Pauly
parent e08f35b5d0
commit 64b8e01444
1 changed files with 7 additions and 0 deletions
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7
lib/encryption/encryption.dart
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@ -148,6 +148,13 @@ class Encryption {
// TODO: maybe clear outbound session, if it is ours
throw (DecryptError.CHANNEL_CORRUPTED);
}
final existingIndex = inboundGroupSession.indexes.entries.firstWhere(
(e) => e.value == decryptResult.message_index,
orElse: () => null);
if (existingIndex != null && existingIndex.key != messageIndexKey) {
// TODO: maybe clear outbound session, if it is ours
throw (DecryptError.CHANNEL_CORRUPTED);
}
inboundGroupSession.indexes[messageIndexKey] =
decryptResult.message_index;
if (!haveIndex) {