[tor-bugs] #23061 [Core Tor/Tor]: crypto_rand_double() should produce all possible outputs on platforms with 32-bit int

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Aug 2 01:36:22 UTC 2017


#23061: crypto_rand_double() should produce all possible outputs on platforms with
32-bit int
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  nickm
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.2.14-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-relay, security-low, privcount,  |  Actual Points:  0.5
  031-backport, 030-backport, 029-backport, 028  |
  -backport-maybe, 027-backport-maybe, 026       |
  -backport-maybe                                |
Parent ID:                                       |         Points:  0.1
 Reviewer:                                       |        Sponsor:
                                                 |  SponsorQ
-------------------------------------------------+-------------------------

Comment (by teor):

 Yawning suggested https://github.com/libressl-
 portable/openbsd/blob/master/src/lib/libc/stdlib/drand48.c

 It might be ok to only have 48 bits of entropy. Or we could extend that
 scheme to give us 52 (or >52 with subnormals).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23061#comment:9>
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