[tor-bugs] #31011 [Core Tor/Tor]: Make the bridge authority reject private PT addresses when DirAllowPrivateAddresses is 0

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#31011: Make the bridge authority reject private PT addresses when
DirAllowPrivateAddresses is 0
-----------------------------------------------+---------------------------
 Reporter:  teor                               |          Owner:  (none)
     Type:  defect                             |         Status:  new
 Priority:  Medium                             |      Milestone:  Tor:
                                               |  unspecified
Component:  Core Tor/Tor                       |        Version:
 Severity:  Normal                             |     Resolution:
 Keywords:  anti-censorship-roadmap-september  |  Actual Points:
Parent ID:  #31009                             |         Points:  1
 Reviewer:                                     |        Sponsor:
                                               |  Sponsor28-can
-----------------------------------------------+---------------------------

Comment (by cjb):

 Replying to [comment:1 arma]:
 > Another option here is to leave the bridge authority alone, and teach
 bridgedb that if there's an internal address in the extrainfo descriptor,
 it should swap it out in favor of the public address in the descriptor.
 >
 > Then once the #31009 fix is sufficiently deployed, it shouldn't matter
 anymore.
 >
 > (That way we could make use of the current obfs4 bridges even if they
 haven't upgraded yet.)

 I think I could volunteer to work on this ticket, but it looks like we
 still need to decide what to do.  Options:

 1) as in the summary, bridgeauth just refuses descriptors with internal
 addresses

 2) arma's suggestion, bridgedb transforms internal addresses to external

 3) Could we also consider having bridgeauth itself, rather than bridgedb
 downstream, perform that transformation?  Or perhaps there's a reason why
 that's not a good idea?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31011#comment:7>
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