WPA/WPA2 key renewal

Dmitry Shmidt dimitrysh at google.com
Wed Feb 24 12:40:02 EST 2010


Hi Jouni,

I am trying to find a solution to the problem when STA misses rekeying.
It is a good point - to measure time between rekeying and get the period.
Can you please point me to the code that can request the AP to do rekeying?

Thanks,

Dmitry

On Tue, Feb 23, 2010 at 11:18 PM, Jouni Malinen <j at w1.fi> wrote:
> On Tue, Feb 23, 2010 at 01:41:50PM -0800, Dmitry Shmidt wrote:
>
>> Is there any way to figure out when AP will do key WPA/WPA2 renewal?
>
> Figure it out where and when? The associated station will know when this
> process started, but it does not know when the AP might do it in the
> future. It can also request the AP to do rekeying immediately.
>
>> I am looking at packet trace and I can not find any information related to this.
>> Is it not "public"? I mean that AP is not sending it at all?
>
> The rekeying handshake is encrypted, so it can get somewhat difficult to
> figure this out from a capture trace. In most cases, you can probably
> figure it out by checking packets lengths and timing for a frame
> exchange between the AP and the station.
>
> --
> Jouni Malinen                                            PGP id EFC895FA
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