lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 6 Feb 2014 14:20:02 -0800
From:	Kees Cook <kees@...flux.net>
To:	Jörn Engel <joern@...fs.org>
Cc:	"Theodore Ts'o" <tytso@....edu>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	macro@...ux-mips.org, ralf@...ux-mips.org, dave.taht@...il.com,
	blogic@...nwrt.org, andrewmcgr@...il.com, smueller@...onox.de,
	geert@...ux-m68k.org, tg@...bsd.de
Subject: Re: [PATCH,RFC] random: collect cpu randomness

Hi Jörn,

On Sun, Feb 02, 2014 at 03:36:17PM -0500, Jörn Engel wrote:
> Collects entropy from random behaviour all modern cpus exhibit.  The
> scheduler and slab allocator are instrumented for this purpose.  How
> much randomness can be gathered is clearly hardware-dependent and hard
> to estimate.  Therefore the entropy estimate is zero, but random bits
> still get mixed into the pools.

Have you seen this work from PaX Team?

http://grsecurity.net/pipermail/grsecurity/2012-July/001093.html

See http://grsecurity.net/test/grsecurity-3.0-3.13.1-201402052349.patch
and search for PAX_LATENT_ENTROPY.

-Kees

-- 
Kees Cook                                            @outflux.net
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists