[tor-bugs] #23061 [Core Tor/Tor]: crypto_rand_double() should produce all possible outputs on platforms with 32-bit int
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Mon Aug 28 05:00:37 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_review
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, 026-backport-maybe, review- |
group-22 |
Parent ID: | Points: 0.1
Reviewer: | Sponsor:
| SponsorQ
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Comment (by teor):
There isn't any point trying to include values between 0 and 2^-53^ in the
output of the function. Because both the Laplace and Gaussian functions do
`1.0 - crypto_rand_double()`, which rounds values smaller than 2^-53^.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23061#comment:34>
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