#29128: Place complete obfs4 bridge line in accessible location
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Reporter: phoul | Owner: (none)
Type: defect | Status: new
Priority: Medium | Milestone: Tor:
| unspecified
Component: Core Tor/Tor | Version:
Severity: Normal | Resolution:
Keywords: tor-pt, tor-doc, | Actual Points:
040-deferred-20190220 |
Parent ID: #30471 | Points:
Reviewer: | Sponsor:
| Sponsor28
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Changes (by teor):
* status: needs_information => new
Comment:
Replying to [comment:11 phw]:
> Replying to [comment:9 nickm]:
> > Is there a standardized way for Tor to learn from the PT which fields
it should put in the Bridge line? It knows the `fingerprint`, and it has
a good guess about the `address` field (though the PT may want to override
that), but it usually needs the PT's help to learn the `port` and any
other fields.
> [[br]]
> I believe that all we need is in the `SMETHOD` line that Tor reads from
the PT proxy's stdout.
The complete PT line is sent to bridge users by BridgeDB.
(That line *must* contain all the required information, otherwise bridge
users wouldn't be able to use the bridge.)
BridgeDB gets bridge PT lines from bridge extra-info document "transport"
lines:
https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt#n1211
These lines come from pt_get_extra_info_descriptor_string(), which you
should be able to just dump to a file:
https://github.com/torproject/tor/blob/989b6325d671744aacec191b181e8b0b0fee35be/src/feature/client/transports.c#L1613
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29128#comment:12>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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