[DragonFlyBSD - Bug #2472] L15 update

[Robin Carey via Redmine]

Issue #2472 has been reported by Robin Carey.

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Bug #2472: L15 update
http://bugs.dragonflybsd.org/issues/2472

Author: Robin Carey
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


Dear DragonFlyBSD-bugs,

I have made a couple of updates to the L15 algorithm since it was imported
into the DragonFlyBSD tree as
the CSPRNG used for /dev/urandom (/sys/kern/kern_nrandom.c).

The first update (output indirection) is purely security related (and a
slight decrease in performance), so I
doubt you'd be interested in that.

However, the second update (which I implemented last night) increases
performance and also is a minor
security improvement. I would have thought this would be of interest to
DragonFly, especially considering
that the (random) system thread on DragonFly calls NANOUP_EVENT()
approximately once every second.

Both updates are available in source form (C++):

http://www.leopard.uk.com/L15

And the corresponding documentation (regarding both updates) is also
available from the above URL.

If you have an questions or don't understand what I'm talking about feel
free to contact me by E-mail.

-- 
Sincerely,

Robin Carey BSc


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