[tor-bugs] #27286 [Core Tor/Tor]: Update recommended and required protocol versions for "LinkAuth"

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#27286: Update recommended and required protocol versions for "LinkAuth"
------------------------------+--------------------------------
     Reporter:  nickm         |      Owner:  nickm
         Type:  defect        |     Status:  assigned
     Priority:  Medium        |  Milestone:  Tor: 0.3.5.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:  #26631
       Points:                |   Reviewer:
      Sponsor:  Sponsor8      |
------------------------------+--------------------------------
 LinkAuth method 1 is the one where we pull the TLS master secrets out of
 the OpenSSL data structures and authenticate them with RSA.  LinkAuth
 method 3 is the one where we use the RFC5705 key export mechanism and
 Ed25519 signatures; it is not supported in 0.2.9.

 Right now we list method 1 as required for clients and relays.  That's a
 problem, since we can't reasonably support it with NSS.

 We should at least say that method 1 is not required for clients, and
 method 3 is recommended for everybody.

 Should any method be required for relays?  I don't think so currently,
 since we don't want to kick anybody off the network.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27286>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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