[Whonix-devel] #16822 [Tor]: make certificate lifetime accessible through Tor's ControlPort

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#16822: make certificate lifetime accessible through Tor's ControlPort
-------------------------+---------------------
 Reporter:  proper       |          Owner:
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:
Component:  Tor          |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
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 I am referring to the following. Sometimes user Tor logs contain something
 like this.

 {{{
 Sep 03 10:32:59.000 [warn] Certificate already expired. Either their clock
 is set wrong, or your clock is wrong.
 Sep 03 10:32:59.000 [warn] (certificate lifetime runs from Aug 16 00:00:00
 2014 GMT through Jul 29 23:59:59 2015 GMT. Your time is Sep 03 10:32:59
 2015 UTC.)
 }}}

 This information is interesting in context for anonymity distributions and
 secure network time synchronization, usability and whatnot. Used by Tails'
 [https://git-tails.immerda.ch/tails/tree/config/chroot_local-
 includes/etc/NetworkManager/dispatcher.d/20-time.sh tordate] or Whonix's
 [https://www.whonix.org/wiki/Dev/TimeSync#anondate anondate].

 However, these tools rely on parsing Tor's log, which is
 [https://labs.riseup.net/code/issues/8977 fragile].

 It would be nice, if something like

 * {{{certificate/valid-after}}}
 * and {{{certificate/valid-until}}}

 where accessible through Tor's ControlPort.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16822>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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