[tor-bugs] #26925 [Core Tor/Tor]: Make link specifier handling in rend-spec-v3 more precise

[Tor Bug Tracker & Wiki]

#26925: Make link specifier handling in rend-spec-v3 more precise
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     Reporter:  teor     |      Owner:  teor
         Type:  defect   |     Status:  assigned
     Priority:  Medium   |  Milestone:  Tor: 0.3.5.x-final
    Component:  Core     |    Version:
  Tor/Tor                |   Keywords:  tor-spec, doc, tor-relay, certs,
     Severity:  Normal   |  handshake, ed25519, 035-roadmap-proposed,
                         |  035-must, fast-fix, 035-triaged-in-20180711
Actual Points:           |  Parent ID:  #26627
       Points:           |   Reviewer:
      Sponsor:           |
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 Split off #26627.

 We should specify that clients and services must not check untrusted link
 specifiers against the consensus:
 https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt#n1705
 https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt#n1705

 Services should also copy unrecognized rend point link specifiers from the
 introduce cell to the rendezvous join cell.
 We can copy the text from the client intro spec:
 https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt#n1705
 To the service rend spec:
 https://gitweb.torproject.org/torspec.git/tree/rend-spec-v3.txt#n1705

 Thanks to catalyst for picking up on these missing parts of the spec.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26925>
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