[DragonFlyBSD - Bug #2677] (Closed) L15 Update

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Thu Jun 12 22:08:44 PDT 2014

Issue #2677 has been updated by dillon.

Status changed from New to Closed
% Done changed from 0 to 100

Closing.  Made modifications as requested and also adjusted /dev/urandom and the sysctl random to use IBAA (which is what /dev/random uses), so they all use IBAA now and nothing uses L15.  These changes will make it into the 3.8.1 roll on Monday June 16th 2014.

In the near future we will run with two independent algorithms and xor their streams together.  We are discussing this now.  3.8.1 will likely roll with just IBAA but if we get the second algorithm in place in the next few weeks we will MFC it to the release branch.


Bug #2677: L15 Update

* Author: robin.carey1
* Status: Closed
* Priority: High
* Assignee: 
* Category: 
* Target version: 3.9.x
Dear DragonFlyBSD bugs,

Today I updated the L15 algorithm, available from:


The update is to the KSA (Key Scheduling Algorithm).

Perhaps DragonFlyBSD should consider updating their version,
as used for /dev/urandom ?


Also, I posted a bug report (some months ago now, I suspect),
which had to do with IBAA (as used for /dev/random), and specifically
relating to warming up the CSPRNG just before output in:


As opposed to doing the warm-up after seeding the CSPRNG,
which unless I am mistaken, is what DragonFlyBSD does at the

I think there might also be one other update to L15 which I
mentioned on bugs at dragonflybsd.org quite a while ago, which
I don't think was met with a response. That was to do with the
STATEINDEX_CARRY change that I made to L15.


In any case I am always happy to discuss these issues by E-mail ...

PS Good luck with the new 3.8.0 Release !!


Robin Carey BSc

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