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Re: [tor-bugs] #9546 [Tor]: Link handshake fails with "Received unexpected cell command 10" on a bridge
#9546: Link handshake fails with "Received unexpected cell command 10" on a bridge
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Reporter: zwol | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: Tor: 0.2.4.x-final
Component: Tor | Version: Tor: 0.2.4.15-rc
Keywords: tor-bridge tor-client 023-backport | Parent:
Points: | Actualpoints:
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Comment(by nickm):
Replying to [comment:20 arma]:
> Why do our bridges decide they're too cool to follow the spec? :)
Looking at the commit logs doesn't shine much light on this.
As near as I can guess, the rationales might have been:
* They don't need to have authenticated incoming connections.
* It's a little weird to let a relay authenticate a connection to a
bridge such that the bridge will use that connection for extending
circuits to that relay.
But I'm not actually seeing a flaw there -- this happens already on
relay<->relay connections to no ill effect. Further, any relay that
wanted to create an authenticated connection to a bridge could do so by
using the v1 or v2 handshake, by acting as a client and extending to
itself, or something like that.
So I'm adding another commit to these branches to cause bridges to send
AUTH_CHALLENGE cells. Please review?
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9546#comment:22>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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