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From: Ulrich Drepper <drepper@redhat.com>
To: Kees Cook <kees.cook@canonical.com>
Cc: Jakub Jelinek <jakub@redhat.com>,
	Arjan van de Ven <arjan@infradead.org>,
	Roland McGrath <roland@redhat.com>,
	linux-kernel@vger.kernel.org, libc-alpha@sourceware.org
Subject: Re: [PATCH] ELF: implement AT_RANDOM for glibc PRNG seeding
Date: Fri, 03 Oct 2008 10:41:56 -0700	[thread overview]
Message-ID: <48E65964.5020809@redhat.com> (raw)
In-Reply-To: <20081003173313.GW10632@outflux.net>

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Kees Cook wrote:
> +#ifndef ELF_AUXV_RANDOM_SIZE
> +/*
> + * AT_RANDOM provides 16 random bytes which can be used to seed
> + * userspace PRNGs at program load time.
> + */
> +#define ELF_AUXV_RANDOM_SIZE 16
> +#endif

No, this cannot be changeable because there is no way for userland to
find out the size.  And no, don't reintroduce the the extra aux vector
entry.  Just define it to 16 and that's it.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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  reply	other threads:[~2008-10-03 17:43 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20081001201116.GD12527@outflux.net>
     [not found] ` <48E3EFD6.2010704@redhat.com>
     [not found]   ` <20081001215657.GH12527@outflux.net>
     [not found]     ` <20081001220948.GC32107@sunsite.ms.mff.cuni.cz>
     [not found]       ` <20081001222706.68E7E1544B4@magilla.localdomain>
2008-10-03  0:16         ` [PATCH] ELF: implement AT_RANDOM for future glibc use Kees Cook
2008-10-03  0:43           ` Jakub Jelinek
2008-10-03  5:25             ` Kees Cook
2008-10-03  5:29             ` Kees Cook
2008-10-03  5:57               ` Arjan van de Ven
2008-10-03  6:25                 ` Ulrich Drepper
2008-10-03 14:50                   ` [PATCH] ELF: implement AT_RANDOM for glibc PRNG seeding Kees Cook
2008-10-03 14:56                     ` Ulrich Drepper
2008-10-03 14:57                     ` Jakub Jelinek
2008-10-03 17:33                       ` Kees Cook
2008-10-03 17:41                         ` Ulrich Drepper [this message]
2008-10-03 17:59                           ` [PATCH v5] " Kees Cook
2008-10-18  5:42                             ` Ulrich Drepper
2008-10-21 20:01                             ` Andrew Morton
2008-10-21 20:22                               ` Ulrich Drepper
2008-10-27  5:46                                 ` Andrew Morton
2008-10-03  0:52           ` [PATCH] ELF: implement AT_RANDOM for future glibc use Roland McGrath
2008-10-03  5:15             ` Kees Cook
2008-10-03 20:22               ` Roland McGrath
2008-10-06  6:00           ` Andi Kleen
2008-10-06 17:50             ` Kees Cook
2008-10-06 18:25               ` David Wagner
2008-10-06 20:23                 ` Andi Kleen
2008-10-06 22:16                   ` David Wagner
2008-10-06 19:26               ` Andi Kleen
2008-10-06 22:01                 ` Kees Cook
2008-10-06 23:19                   ` Andi Kleen
2008-10-06 23:29                     ` Kees Cook
2008-10-06 23:44                       ` Andi Kleen
2008-10-06 22:07                 ` Kees Cook
2008-10-06 23:28                   ` Andi Kleen
2008-10-06 23:58                   ` Roland McGrath
2008-10-07  0:08                     ` Ulrich Drepper
2008-10-07  0:31                     ` Kees Cook
2008-10-07  0:57                       ` Ulrich Drepper
2008-10-07  1:44                         ` Kees Cook
2008-10-07  1:51                           ` Ulrich Drepper

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