[tor-bugs] #26228 [Core Tor/Tor]: Clarify/determine specification for padding bytes, PADDING cell

Tor Bug Tracker & Wiki blackhole at torproject.org
Tue May 29 21:15:37 UTC 2018


#26228: Clarify/determine specification for padding bytes, PADDING cell
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 Reporter:  dmr           |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  tor-spec      |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by arma):

 My preference would be for padding cells to have a 0 byte payload
 currently, and then we randomize the non payload portions of relay cells
 like we (sometimes) say we do.

 Maybe I'm missing something, but I don't understand why we'd want to do a
 hybrid "8 bytes of 0's and then random after that" model for the non
 payload portions of the relay cells.

 As a concrete example, see proposal 289 for a case where we will want the
 non payload part of the relay data cell to be random (even if it's only
 one byte).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26228#comment:3>
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