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Re: [tor-bugs] #7098 [Tor]: Add safe-cookie authentication to Extended ORPort and TransportControlPort



#7098: Add safe-cookie authentication to Extended ORPort and TransportControlPort
------------------------+---------------------------------------------------
 Reporter:  asn         |          Owner:                    
     Type:  defect      |         Status:  needs_review      
 Priority:  normal      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor         |        Version:                    
 Keywords:  tor-bridge  |         Parent:  #4773             
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------
Changes (by nickm):

  * status:  new => needs_review


Comment:

 Replying to [comment:9 asn]:
 > See branch `bug7098_draft` in
 `https://git.torproject.org/user/asn/torspec.git` for an early-draft of
 the proposal. Do you like the general direction of the protocol?

 I don't think the version negotiation works.  What is the client supposed
 to do if it sees a version it doesn't recognize, or an authentication
 means that it doesn't support? What if the server supports multiple
 versions/authenticators?  Other than that, looks sane.  Also, it should
 specify how the client finds out the cookie; that was a world of trouble
 in the earlier control protocol things.

 "Tor Port Guardian" is a bit silly as a name.  We already have "Guards";
 let's not confuse people.  How about just "Tor Extended ORPort
 Authentication" ?

 The cookie file should have have 32 fixed bytes to start with, and then a
 fixed-length cookie.

 I really do want to know how the parent protocol specifies the file
 location.

 TOR_AUTH_PT_COOKIE should be TOR_AUTH_PT_COOKIE_FILE imo.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7098#comment:10>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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