[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [tor-bugs] #4900 [Tor Relay]: Use a more randomized hash function for our hash tables

#4900: Use a more randomized hash function for our hash tables
--------------------------+-------------------------------------------------
 Reporter:  nickm         |          Owner:                    
     Type:  defect        |         Status:  new               
 Priority:  normal        |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Relay     |        Version:                    
 Keywords:  dos security  |         Parent:                    
   Points:                |   Actualpoints:                    
--------------------------+-------------------------------------------------

Comment(by nickm):

 I've got the start of a proof-of-concept in bug4900 in my public repo.
 Trouble is, it crashes Tor on startup, because we need to set a global
 seed before we put anything into a hash table, but we can't get a good
 seed until we've initialized openssl.  More hacking needed.

 The good news here is that this change doesn't seem to slow stuff down
 much. ./src/test/bench reports about a 4-5% slowdown in digestmap
 operations on my 32-bit laptop.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4900#comment:1>
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