From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: Re: [PATCH] Add support for mkostemp, mkstemps and mkostemps
Date: Wed, 30 Jan 2013 14:45:37 +0100 [thread overview]
Message-ID: <20130130134537.GF6181@port70.net> (raw)
In-Reply-To: <5108D2F7.3050207@qomboo.com>
* Hardy Falk <hardy.falk@qomboo.com> [2013-01-30 08:59:51 +0100]:
> Am 30.01.2013 08:21, schrieb Rich Felker:
> >On Tue, Jan 29, 2013 at 06:16:11PM -0500, Anthony G. Basile wrote:
> >>>implement, but the random name generator definitely needs a better
> >>>algorithm. I just adopted what was already there, but its not good
> >>>enough.
> >>>
> You should try "shr3" by George Marsaglia (rip)
no, we dont need a prng there, we get new entropy
at each try from the clock source
the statistical quality may be improved a bit with
different hashing of the time and addresses, but
it is reasonable now
for retries the iteration count and the previous
rand could be used as well, but that's a rare case
more significant improvement can be done by larger
set of names and better entropy source
the current 24bit should be good enough for most
practical use (you can generate a few thousand
names before a collision happens, assuming uniform
distribution) but that may be worth increasing
the entropy source is mostly problematic on embedded
systems with bad clock, but there is probably no
good source at all there
> https://groups.google.com/forum/?fromgroups=#!msg/sci.math/k3kVM8KwR-s/jxPdZl8XWZkJ
i could not open this
another evil from google..
next prev parent reply other threads:[~2013-01-30 13:45 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-28 5:06 Anthony G. Basile
2013-01-28 8:47 ` John Spencer
2013-01-28 9:37 ` Szabolcs Nagy
2013-01-28 17:33 ` Szabolcs Nagy
2013-01-29 23:16 ` Anthony G. Basile
2013-01-30 7:21 ` Rich Felker
2013-01-30 7:59 ` Hardy Falk
2013-01-30 13:45 ` Szabolcs Nagy [this message]
2013-01-30 16:51 ` Rich Felker
2013-01-30 19:12 ` Szabolcs Nagy
2013-01-30 19:22 ` Rich Felker
2013-01-31 0:28 ` Szabolcs Nagy
2013-01-28 16:33 ` Rich Felker
2013-02-02 3:48 ` Rich Felker
2013-02-02 18:46 ` Anthony G. Basile
-- strict thread matches above, loose matches on Subject: below --
2013-02-02 21:15 Anthony G. Basile
2013-02-02 21:17 ` Anthony G. Basile
2013-02-03 3:30 ` Rich Felker
2013-02-02 18:45 Anthony G. Basile
2013-02-02 19:51 ` John Spencer
2013-02-02 19:59 ` John Spencer
2013-02-02 22:11 ` Szabolcs Nagy
2013-02-02 20:14 ` Szabolcs Nagy
2013-02-02 20:38 ` Anthony G. Basile
2013-02-02 22:22 ` Szabolcs Nagy
2013-01-28 2:36 Anthony G. Basile
2013-01-28 5:01 ` Anthony G. Basile
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