[tor-bugs] #18320 [Core Tor/Tor]: Clear old entries from the key-pinning journal file

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#18320: Clear old entries from the key-pinning journal file
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 Reporter:  teor                        |          Owner:  andrea
     Type:  defect                      |         Status:  assigned
 Priority:  Medium                      |      Milestone:  Tor:
Component:  Core Tor/Tor                |  0.2.9.x-final
 Severity:  Normal                      |        Version:
 Keywords:  tor-dos, TorCoreTeam201606  |     Resolution:
Parent ID:  #17293                      |  Actual Points:
 Reviewer:                              |         Points:  3
                                        |        Sponsor:  SponsorU-can
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Comment (by nickm):

 Replying to [comment:12 andrea]:
 > Just why are relays switching back between multiple ed25519 keys with
 the same RSA key?  I'm going to go ahead and implement periodic pruning of
 duplicates from the journal file, but I think nickm's "maybe we should
 remember the conflict" comment hinges on whether this is a sign of a bug
 somewhere else we should fix, or something we should accommodate here.

 I think we should investigate whether it's happening for just a few nodes
 or a bunch.

 If just a few, we can try to investigate that more, or just forbid it
 entirely.

 If a lot, we need to investigate.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18320#comment:14>
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