On 21/11/2018 19:43, Christopher Schultz wrote:
> Mark,
> 
> On 11/21/18 11:51, Mark Thomas wrote:
>> On 21/11/2018 16:36, Mark Thomas wrote:
>>> On 21/11/2018 15:37, Mark Thomas wrote:
>>>> On 21/11/2018 15:29, Christopher Schultz wrote:
>>>>> All,
>>>>>
>>>>> With this last patch, I'm ready for a back-port to tc8.5.x,
>>>>> but I'm waiting for a user who is trying to get this working
>>>>> on tc9.0 to be successful.
>>>>>
>>>>> If anyone else can confirm that this is all working in a real
>>>>> cluster (dev/test is okay) then I'll go ahead and back-port,
>>>>> assuming there is some kind of configuration error in that
>>>>> particular user's case.
>>>>
>>>> I'll fire up my 4 node test cluster and let you know. It may
>>>> take me a while - there are usually a bunch of OS updates
>>>> waiting for me when I start it up.
>>>
>>> I'm seeing lots of errors.
>>>
>>> I think the problem is that the interceptor is using one Cipher
>>> for all members but nodes don't send the same messages to every
>>> member so the members get out of sync and decryption starts
>>> failing.
> 
>> Oh, and to add to the 'fun' messages may be processed out of
>> order.
> 
> That should also be okay, since messages aren't related to each other.
> 
> But it might be a problem with trying to prevent replay attacks.

I thought you were using CBC so a missing block (a message being one or
more blocks) means that the next message can't be decrypted.

Mark

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