[Maas-devel] Clock skew and OAuth

[Gavin Panella]

On 20 August 2012 16:41, Robie Basak <robie.basak at canonical.com> wrote:
> Scott pointed out a flaw in this to me offline. I had assumed that the
> clock is only wrong by being in the past, and this solution will not
> address the problem of the clock being wrong by being in the future.
>
> But AIUI now, this is problem on machines which have previously been
> running on other OSes with the hardware clock set to local time rather
> than UTC.
>
> This may completely wipe out my proposal, since we can only safely move
> the time towards the future with this plan, and not towards the past.

Is there any such thing as a time-since-power-on clock? That, in
combination with it_is_after, would give us a semi-reliable upper
bound on the correct time.