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Re: [tor-bugs] #11565 [Tor]: Make it clear if circ_id for create cell can be zero with non zero MSB

#11565: Make it clear if circ_id for create cell can be zero with non zero MSB
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     Reporter:  cypherpunks  |      Owner:
         Type:  defect       |     Status:  new
     Priority:  normal       |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by cypherpunks):

 > Even if you succeeded, it's not clear to me what good it would do to
 know whether A or B is the initiator.

 Agreed. It's zero chance to make it worse with v4 link protocol.

 But v3 link protocol have chance for client to leak fact of new version
 (without limits for 0x80..00), if MSB set after cmp recved key with
 internal pkey. Then maybe to allow implementations to have zero MSB only
 if no certs sent (it's unclear part too, client allowed not to use certs
 but what about CircID for them?) v3 link protocol can long used for some
 months (years?) yet.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11565#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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