[tor-bugs] #17694 [Tor]: Hash PRNG output before use, so that it's not revealed to the network

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#17694: Hash PRNG output before use, so that it's not revealed to the network
-----------------------------+--------------------------------
     Reporter:  teor         |      Owner:
         Type:  enhancement  |     Status:  new
     Priority:  Medium       |  Milestone:  Tor: 0.2.8.x-final
    Component:  Tor          |    Version:  Tor: unspecified
     Severity:  Normal       |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |    Sponsor:
-----------------------------+--------------------------------
 In a review of prop250, ioerror suggests that we should hash raw random
 values before revealing them to the network.

 https://lists.torproject.org/pipermail/tor-dev/2015-November/009954.html

 This avoids an attack similar to the one that broke Dual EC:
 http://projectbullrun.org/dual-ec/ext-rand.html

 I have a patch for this, I need to clean it up to merge cleanly on top of
 #17686.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17694>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
_______________________________________________
tor-bugs mailing list
tor-bugs@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs