<div dir="auto">The hash drbg from the drbg package should meet your needs. Deterministic, pure Haskell except the actual hash function.</div><div class="gmail_extra"><br><div class="gmail_quote">On Oct 10, 2017 8:13 PM, "Viktor Dukhovni" <<a href="mailto:ietf-dane@dukhovni.org">ietf-dane@dukhovni.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
> On Oct 10, 2017, at 8:48 PM, Kazu Yamamoto (山本和彦) <<a href="mailto:kazu@iij.ad.jp">kazu@iij.ad.jp</a>> wrote:<br>
><br>
> Before the release, I would like to replace the random package since<br>
> it is slow. I'm looking for a random library which is<br>
> - fast<br>
> - thread-safe (good for concurrent use)<br>
><br>
> Any recommendations?<br>
<br>
Just to make it more interesting, I should mention that the RNG<br>
should be not just statistically random, but should in fact be<br>
crypto random (resist predictability through cryptanalysis when<br>
properly seeded).<br>
<br>
So indeed there are two more issues here:<br>
<br>
- Securely seeding the RNG (likely using the OS API for<br>
random seeds, and/or the RDSEED/RDRAND instructions on<br>
Intel CPUs), IIRC we can that from cryptonite, I hope<br>
at a reasonable cost.<br>
<br>
- Choosing a suitable DRBG based on the seed. Likely again<br>
something from cryptonite.<br>
<br>
Some time back I posted to the cryptography list about the<br>
soundness of relying on RDRAND in cryptonite's RNG (uses<br>
it instead of /dev/urandom and the like when available).<br>
The rough consensus IIRC was not rely solely on RDRAND.<br>
I never went back to write a PR to address that...<br>
<br>
<a href="http://www.metzdowd.com/pipermail/cryptography/2016-November/thread.html#30859" rel="noreferrer" target="_blank">http://www.metzdowd.com/<wbr>pipermail/cryptography/2016-<wbr>November/thread.html#30859</a><br>
<br>
--<br>
Viktor.<br>
<br>
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