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Check that shared IGS has higher index than stored 

Copies the logic from key import.
pull/202/head
Toni Spets 2024-03-18 13:05:33 +02:00 committed by Toni Spets
parent 4dd7adc7be
commit 9fe66581e5
1 changed files with 5 additions and 0 deletions
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5
crypto/keysharing.go
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@ -184,6 +184,11 @@ func (mach *OlmMachine) importForwardedRoomKey(ctx context.Context, evt *Decrypt
MaxMessages: maxMessages,
IsScheduled: content.IsScheduled,
}
existingIGS, _ := mach.CryptoStore.GetGroupSession(ctx, igs.RoomID, igs.SenderKey, igs.ID())
if existingIGS != nil && existingIGS.Internal.FirstKnownIndex() <= igs.Internal.FirstKnownIndex() {
// We already have an equivalent or better session in the store, so don't override it.
return false
}
err = mach.CryptoStore.PutGroupSession(ctx, content.RoomID, content.SenderKey, content.SessionID, igs)
if err != nil {
log.Error().Err(err).Msg("Failed to store new inbound group session")