[tor-bugs] #13837 [Core Tor/Tor]: Mitigate guard discovery by pinning middle node

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Dec 4 12:15:02 UTC 2017


#13837: Mitigate guard discovery by pinning middle node
-------------------------------------------------+-------------------------
 Reporter:  asn                                  |          Owner:
                                                 |  mikeperry
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs, tor-guard, guard-discovery-  |  Actual Points:
  prop247-controller                             |
Parent ID:  #9001                                |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorV-can
-------------------------------------------------+-------------------------
Changes (by asn):

 * status:  needs_review => needs_revision


Comment:

 Replying to [comment:21 mikeperry]:
 > I have a branch for this in
 https://oniongit.eu/mikeperry/tor/commits/bug13837. It has two commits:
 one that just does the dead-simple layer2 and layer3 guard thing, and then
 a second that adds purposes for hsdirs, so that those use pinned guards
 too.
 >
 > This patch disables cannibalization and predictive circuit building for
 vanguard circuits. That is bug #23101.
 >
 > Note also that the branch is based on the branch for #23114 currently,
 since I need all of that code for https://github.com/mikeperry-
 tor/vanguards to work properly.
 >
 > I'm not sure the best way to test this. I've been testing it with
 https://github.com/mikeperry-tor/vanguards. Do we have other suggestions?

 Very nice! I reviewed the code but haven't tested it yet. Looks good!!!

 I suggested some logs and such that would make testing easier. I haven't
 tried your vanguards project yet either.

 After the logs are added (or Ill add them if I need to), I'll start
 testing this on the realnet as well!

 Cheers!

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13837#comment:22>
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