From: Florian Weimer <fweimer@redhat.com>
To: Roland McGrath <roland@hack.frob.com>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH] Add getrandom implementation [BZ #17252]
Date: Thu, 23 Jun 2016 17:21:00 -0000 [thread overview]
Message-ID: <d5e584cf-d189-be37-556e-eff8b6bb241d@redhat.com> (raw)
In-Reply-To: <20160610221525.038C62C39FB@topped-with-meat.com>
On 06/11/2016 12:15 AM, Roland McGrath wrote:
> You need to start with rationale justifying the new nonstandard API and why
> it belongs in libc,
Based on the last discussion, I assumed that we had consensus that we'd
add wrappers for system calls which do not have merely niche applications.
There are about a dozen widely used cryptographic libraries on GNU/Linux
which would use the system call to seed their PRNGs. The /dev/urandom
interface is considered insufficient, due to the boot-time
initialization issue, and due to the potential unavailability of the
device node.
In addition, many libraries need a one-time entropy source to initialize
cookies (like our stack guard), or keys for randomized hash tables.
> let alone why it should litter a POSIX-standard header.
We can certainly put into something like <sys/random.h>.
But if there is no consensus to evolve the Linux-specific glibc API, I
don't know what to do.
getrandom support in glibc is requested rather often. Here is a recent
example:
<https://www.python.org/dev/peps/pep-0522/>
Thanks,
Florian
next prev parent reply other threads:[~2016-06-23 17:21 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-10 21:03 Florian Weimer
2016-06-10 21:31 ` Joseph Myers
2016-06-10 21:36 ` Joseph Myers
2016-06-10 22:00 ` Paul Eggert
2016-06-10 22:06 ` Joseph Myers
2016-06-11 11:13 ` Florian Weimer
2016-06-11 20:10 ` Paul Eggert
2016-06-10 22:15 ` Roland McGrath
2016-06-10 22:40 ` Joseph Myers
2016-06-10 22:45 ` Roland McGrath
2016-06-23 17:21 ` Florian Weimer [this message]
2016-06-25 21:58 ` Paul Eggert
2016-09-02 22:23 ` Roland McGrath
2016-06-27 15:07 ` [PATCH v2] " Florian Weimer
2016-06-30 9:33 ` Rical Jasan
2016-09-08 9:53 ` Florian Weimer
2016-09-08 10:13 ` Andreas Schwab
2016-09-08 10:28 ` Florian Weimer
2016-09-08 11:58 ` Rical Jasan
2016-09-08 12:36 ` Florian Weimer
2016-06-30 12:03 ` Zack Weinberg
2016-07-13 13:10 ` Nikos Mavrogiannopoulos
2016-11-14 17:45 ` [PATCH v7] getrandom system call wrapper " Florian Weimer
2016-11-14 18:29 ` Zack Weinberg
2016-11-15 20:57 ` Richard Henderson
2016-11-16 15:11 ` Florian Weimer
2016-11-16 15:20 ` Zack Weinberg
2016-11-16 15:52 ` Florian Weimer
2016-11-16 16:41 ` Zack Weinberg
2016-11-17 13:02 ` Florian Weimer
2016-11-17 13:46 ` Zack Weinberg
2016-11-17 13:50 ` Florian Weimer
2016-11-17 13:56 ` Zack Weinberg
2016-11-17 15:24 ` Florian Weimer
2016-11-17 17:16 ` Zack Weinberg
2016-11-18 10:27 ` Szabolcs Nagy
2016-11-18 15:46 ` Torvald Riegel
2016-11-18 18:50 ` Zack Weinberg
2016-11-21 16:57 ` Torvald Riegel
2016-11-21 17:12 ` Zack Weinberg
2016-11-21 17:30 ` Torvald Riegel
2016-11-21 17:34 ` Florian Weimer
2016-11-29 8:24 ` Florian Weimer
2016-11-16 18:02 ` Torvald Riegel
2016-11-16 19:53 ` Adhemerval Zanella
2016-11-17 12:52 ` Torvald Riegel
2016-11-18 8:28 ` Szabolcs Nagy
2016-11-18 14:21 ` Torvald Riegel
2016-11-18 15:13 ` Florian Weimer
2016-11-18 16:04 ` Torvald Riegel
2016-11-29 8:16 ` Florian Weimer
2016-11-29 13:56 ` Torvald Riegel
2016-11-29 14:40 ` Florian Weimer
2016-11-29 15:23 ` Torvald Riegel
2016-11-29 15:32 ` Florian Weimer
2016-11-29 15:54 ` Zack Weinberg
2016-11-29 17:53 ` Paul Eggert
2016-11-29 18:11 ` Florian Weimer
2016-11-29 19:37 ` Paul Eggert
2016-11-30 6:09 ` Florian Weimer
2016-11-17 6:21 ` Mike Frysinger
2016-11-18 13:21 ` Florian Weimer
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