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Re: [tor-bugs] #23875 [Applications/Tor Browser]: Facebook's onion site is a single hop onion, but clicking on the Tor onion icon shows that it is a 6 hop circuit.



#23875: Facebook's onion site is a single hop onion, but clicking on the Tor onion
icon shows that it is a 6 hop circuit.
--------------------------------------+-----------------------------------
 Reporter:  Dbryrtfbcbhgf             |          Owner:  tbb-team
     Type:  defect                    |         Status:  needs_information
 Priority:  High                      |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Major                     |     Resolution:
 Keywords:  tbb-circuit-display       |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by dgoulet):

 Replying to [comment:3 gk]:
 > dgoulet: What do we need to check for deciding whether we have a single
 onion service vs. a "normal" one?

 For v2 services (current scheme of 16 char .onion), you can't know. The
 service descriptor doesn't advertise such a thing.

 For v3 services (>= 0.3.2), the service will put in its descriptor
 `single-onion-service` so by fetching it, a client will know.

 However, v3 service don't have control port support yet but it is planned
 (hopefully, best effort!) to be in 0.3.3. I think maybe a GETINFO command
 to ask if this .onion is a single onion (without triggering a descriptor
 fetch ofc). Or we could also mention it in the HS_DESC event as well so TB
 could monitor that event. Not familiar if TB monitors events but anyway
 there are ways to deal with that.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23875#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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