[tor-bugs] #14845 [Tor]: Controller: retrieve an HS descriptor from the client's cache

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#14845: Controller: retrieve an HS descriptor from the client's cache
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     Reporter:  dgoulet      |      Owner:  dgoulet
         Type:  enhancement  |     Status:  needs_review
     Priority:  normal       |  Milestone:  Tor: 0.2.7.x-final
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:  SponsorR tor-hs controller
Actual Points:               |  Parent ID:  #3521
       Points:               |
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Comment (by yawning):

 The patch LGTM, with a separate patch at a later date adding a generic
 onion address validator routine to `rendcommon.h/c` that can return
 descriptive reasons for why we dislike a particular onion address (and to
 ease the amount of cleanup we need to do when Ed25519 happens).

 Maybe do: "const rend_cache_entry_t *e = NULL;" to catch dumb in the
 future, though it's fine either way.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14845#comment:11>
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