[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
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  teor
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-spec, doc, tor-relay, certs,     |  Actual Points:
  handshake, ed25519, 035-roadmap-proposed,      |
  035-must, fast-fix, 035-triaged-in-20180711    |
Parent ID:  #26627                               |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by teor):

 * status:  assigned => needs_review


Old description:

> 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.

New description:

 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.

 Edit: fix line numbers

--

Comment:

 See my branch bug26925 on https://github.com/teor2345/torspec.git

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26925#comment:1>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online