From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: David Laight <David.Laight@aculab.com>
Cc: George Spelvin <linux@sciencehorizons.net>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"ebiggers3@gmail.com" <ebiggers3@gmail.com>,
"hannes@stressinduktion.org" <hannes@stressinduktion.org>,
"jeanphilippe.aumasson@gmail.com"
<jeanphilippe.aumasson@gmail.com>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"luto@amacapital.net" <luto@amacapital.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"tom@herbertland.com" <tom@herbertland.com>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"tytso@mit.edu" <tytso@mit.edu>,
"vegard.nossum@gmail.com" <vegard.nossum@gmail.com>,
"djb@cr.yp.to" <djb@cr.yp.to>
Subject: Re: [PATCH v5 1/4] siphash: add cryptographically secure PRF
Date: Fri, 16 Dec 2016 18:09:26 +0100 [thread overview]
Message-ID: <CAHmME9ruYEJbLOij9ooYxLNgkOfr6F9c87dJjD3D_aFVsEFJZQ@mail.gmail.com> (raw)
In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6DB0241238@AcuExch.aculab.com>
Hi David,
On Fri, Dec 16, 2016 at 6:06 PM, David Laight <David.Laight@aculab.com> wrote:
> A 32bit hash would also remove all the issues about the alignment
> of IP addresses (etc) on 64bit systems.
The current replacements of md5_transform with siphash in the v6 patch
series will continue to use the original siphash, since the 128-bit
key is rather important for these kinds of secrets. Additionally,
64-bit siphash is already faster than the md5_transform that it
replaces. So the alignment concerns (now, non-issues; problems have
been solved, I believe) still remain.
Jason
WARNING: multiple messages have this Message-ID (diff)
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: David Laight <David.Laight@aculab.com>
Cc: George Spelvin <linux@sciencehorizons.net>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"ebiggers3@gmail.com" <ebiggers3@gmail.com>,
"hannes@stressinduktion.org" <hannes@stressinduktion.org>,
"jeanphilippe.aumasson@gmail.com"
<jeanphilippe.aumasson@gmail.com>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"luto@amacapital.net" <luto@amacapital.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"tom@herbertland.com" <tom@herbertland.com>,
"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
"tytso@mit.edu" <tytso@mit.edu>,
"vegard.nossum@gmail.com" <vegard.nossum@gmail.com>,
"djb@cr.yp.to" <djb@cr.yp.to>
Subject: [kernel-hardening] Re: [PATCH v5 1/4] siphash: add cryptographically secure PRF
Date: Fri, 16 Dec 2016 18:09:26 +0100 [thread overview]
Message-ID: <CAHmME9ruYEJbLOij9ooYxLNgkOfr6F9c87dJjD3D_aFVsEFJZQ@mail.gmail.com> (raw)
In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6DB0241238@AcuExch.aculab.com>
Hi David,
On Fri, Dec 16, 2016 at 6:06 PM, David Laight <David.Laight@aculab.com> wrote:
> A 32bit hash would also remove all the issues about the alignment
> of IP addresses (etc) on 64bit systems.
The current replacements of md5_transform with siphash in the v6 patch
series will continue to use the original siphash, since the 128-bit
key is rather important for these kinds of secrets. Additionally,
64-bit siphash is already faster than the md5_transform that it
replaces. So the alignment concerns (now, non-issues; problems have
been solved, I believe) still remain.
Jason
next prev parent reply other threads:[~2016-12-16 17:09 UTC|newest]
Thread overview: 182+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-15 20:29 [PATCH v5 0/4] The SipHash Patchset Jason A. Donenfeld
2016-12-15 20:29 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-15 20:30 ` [PATCH v5 1/4] siphash: add cryptographically secure PRF Jason A. Donenfeld
2016-12-15 20:30 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-15 22:42 ` George Spelvin
2016-12-15 22:42 ` [kernel-hardening] " George Spelvin
2016-12-15 23:00 ` Jean-Philippe Aumasson
2016-12-15 23:00 ` [kernel-hardening] " Jean-Philippe Aumasson
2016-12-15 23:28 ` George Spelvin
2016-12-15 23:28 ` [kernel-hardening] " George Spelvin
2016-12-16 17:06 ` David Laight
2016-12-16 17:06 ` [kernel-hardening] " David Laight
2016-12-16 17:06 ` David Laight
2016-12-16 17:09 ` Jason A. Donenfeld [this message]
2016-12-16 17:09 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 17:09 ` Jason A. Donenfeld
2016-12-16 3:46 ` George Spelvin
2016-12-16 3:46 ` [kernel-hardening] " George Spelvin
2016-12-16 8:08 ` Jean-Philippe Aumasson
2016-12-16 8:08 ` [kernel-hardening] " Jean-Philippe Aumasson
2016-12-16 12:39 ` Jason A. Donenfeld
2016-12-16 12:39 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 13:22 ` Jean-Philippe Aumasson
2016-12-16 13:22 ` [kernel-hardening] " Jean-Philippe Aumasson
2016-12-16 15:51 ` Jason A. Donenfeld
2016-12-16 15:51 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 17:36 ` George Spelvin
2016-12-16 17:36 ` [kernel-hardening] " George Spelvin
2016-12-16 18:00 ` Jason A. Donenfeld
2016-12-16 18:00 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 20:17 ` George Spelvin
2016-12-16 20:17 ` [kernel-hardening] " George Spelvin
2016-12-16 20:43 ` Theodore Ts'o
2016-12-16 20:43 ` [kernel-hardening] " Theodore Ts'o
2016-12-16 22:13 ` George Spelvin
2016-12-16 22:13 ` [kernel-hardening] " George Spelvin
2016-12-16 22:15 ` Andy Lutomirski
2016-12-16 22:15 ` [kernel-hardening] " Andy Lutomirski
2016-12-16 22:15 ` Andy Lutomirski
2016-12-16 22:18 ` Jason A. Donenfeld
2016-12-16 22:18 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 23:44 ` George Spelvin
2016-12-16 23:44 ` [kernel-hardening] " George Spelvin
2016-12-17 1:39 ` Jason A. Donenfeld
2016-12-17 1:39 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-17 2:15 ` George Spelvin
2016-12-17 2:15 ` [kernel-hardening] " George Spelvin
2016-12-17 15:41 ` Theodore Ts'o
2016-12-17 15:41 ` [kernel-hardening] " Theodore Ts'o
2016-12-17 16:14 ` Jeffrey Walton
2016-12-17 16:14 ` [kernel-hardening] " Jeffrey Walton
2016-12-19 17:21 ` Jason A. Donenfeld
2016-12-17 12:42 ` George Spelvin
2016-12-17 12:42 ` [kernel-hardening] " George Spelvin
2016-12-16 20:39 ` Jason A. Donenfeld
2016-12-16 20:39 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 19:47 ` Tom Herbert
2016-12-16 19:47 ` [kernel-hardening] " Tom Herbert
2016-12-16 20:41 ` George Spelvin
2016-12-16 20:41 ` [kernel-hardening] " George Spelvin
2016-12-16 20:57 ` Tom Herbert
2016-12-16 20:57 ` [kernel-hardening] " Tom Herbert
2016-12-16 20:44 ` Daniel Micay
2016-12-16 20:44 ` [kernel-hardening] " Daniel Micay
2016-12-16 21:09 ` Jason A. Donenfeld
2016-12-17 15:21 ` George Spelvin
2016-12-17 15:21 ` [kernel-hardening] " George Spelvin
2016-12-19 14:14 ` David Laight
2016-12-19 14:14 ` [kernel-hardening] " David Laight
2016-12-19 14:14 ` David Laight
2016-12-19 18:10 ` George Spelvin
2016-12-19 18:10 ` [kernel-hardening] " George Spelvin
2016-12-19 20:18 ` Jean-Philippe Aumasson
2016-12-19 20:18 ` [kernel-hardening] " Jean-Philippe Aumasson
2016-12-16 2:14 ` kbuild test robot
2016-12-16 2:14 ` [kernel-hardening] " kbuild test robot
2016-12-17 14:55 ` Jeffrey Walton
2016-12-17 14:55 ` [kernel-hardening] " Jeffrey Walton
2016-12-19 17:08 ` Jason A. Donenfeld
2016-12-19 17:08 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-19 17:19 ` Jean-Philippe Aumasson
2016-12-19 17:19 ` [kernel-hardening] " Jean-Philippe Aumasson
2016-12-15 20:30 ` [PATCH v5 2/4] siphash: add Nu{32,64} helpers Jason A. Donenfeld
2016-12-15 20:30 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 10:39 ` David Laight
2016-12-16 10:39 ` [kernel-hardening] " David Laight
2016-12-16 10:39 ` David Laight
2016-12-16 15:44 ` George Spelvin
2016-12-16 15:44 ` [kernel-hardening] " George Spelvin
2016-12-15 20:30 ` [PATCH v5 3/4] secure_seq: use SipHash in place of MD5 Jason A. Donenfeld
2016-12-15 20:30 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 9:59 ` David Laight
2016-12-16 9:59 ` [kernel-hardening] " David Laight
2016-12-16 9:59 ` David Laight
2016-12-16 15:57 ` Jason A. Donenfeld
2016-12-16 15:57 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 15:57 ` Jason A. Donenfeld
2016-12-15 20:30 ` [PATCH v5 4/4] random: " Jason A. Donenfeld
2016-12-15 20:30 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 3:03 ` [PATCH v6 0/5] The SipHash Patchset Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 3:03 ` [PATCH v6 1/5] siphash: add cryptographically secure PRF Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 3:03 ` [PATCH v6 2/5] secure_seq: use SipHash in place of MD5 Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 3:03 ` [PATCH v6 3/5] random: " Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 21:31 ` Andy Lutomirski
2016-12-16 21:31 ` [kernel-hardening] " Andy Lutomirski
2016-12-16 21:31 ` Andy Lutomirski
2016-12-16 3:03 ` [PATCH v6 4/5] md5: remove from lib and only live in crypto Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-16 3:03 ` [PATCH v6 5/5] syncookies: use SipHash in place of SHA1 Jason A. Donenfeld
2016-12-16 3:03 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 0/6] The SipHash Patchset Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 1/6] siphash: add cryptographically secure PRF Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 1:40 ` Stephen Hemminger
2016-12-22 1:40 ` [kernel-hardening] " Stephen Hemminger
2016-12-21 23:02 ` [PATCH v7 2/6] secure_seq: use SipHash in place of MD5 Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 3/6] random: " Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:13 ` Jason A. Donenfeld
2016-12-21 23:13 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:42 ` Andy Lutomirski
2016-12-21 23:42 ` [kernel-hardening] " Andy Lutomirski
2016-12-21 23:42 ` Andy Lutomirski
2016-12-22 2:07 ` Hannes Frederic Sowa
2016-12-22 2:07 ` [kernel-hardening] " Hannes Frederic Sowa
2016-12-22 2:07 ` Hannes Frederic Sowa
2016-12-22 2:09 ` Andy Lutomirski
2016-12-22 2:09 ` [kernel-hardening] " Andy Lutomirski
2016-12-22 2:09 ` Andy Lutomirski
2016-12-22 2:49 ` Jason A. Donenfeld
2016-12-22 2:49 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 2:49 ` Jason A. Donenfeld
2016-12-22 3:12 ` Jason A. Donenfeld
2016-12-22 3:12 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 3:12 ` Jason A. Donenfeld
2016-12-22 5:41 ` Theodore Ts'o
2016-12-22 5:41 ` [kernel-hardening] " Theodore Ts'o
2016-12-22 6:03 ` Jason A. Donenfeld
2016-12-22 15:58 ` Theodore Ts'o
2016-12-22 15:58 ` [kernel-hardening] " Theodore Ts'o
2016-12-22 16:16 ` Jason A. Donenfeld
2016-12-22 16:16 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 16:30 ` Theodore Ts'o
2016-12-22 16:36 ` Jason A. Donenfeld
2016-12-22 12:47 ` Hannes Frederic Sowa
2016-12-22 12:47 ` [kernel-hardening] " Hannes Frederic Sowa
2016-12-22 13:10 ` Jason A. Donenfeld
2016-12-22 15:05 ` Hannes Frederic Sowa
2016-12-22 15:12 ` Jason A. Donenfeld
2016-12-22 15:29 ` Jason A. Donenfeld
2016-12-22 15:33 ` Hannes Frederic Sowa
2016-12-22 15:33 ` [kernel-hardening] " Hannes Frederic Sowa
2016-12-22 15:41 ` Jason A. Donenfeld
2016-12-22 15:51 ` Hannes Frederic Sowa
2016-12-22 15:51 ` [kernel-hardening] " Hannes Frederic Sowa
2016-12-22 15:53 ` Jason A. Donenfeld
2016-12-22 15:54 ` Theodore Ts'o
2016-12-22 15:54 ` [kernel-hardening] " Theodore Ts'o
2016-12-22 18:08 ` Hannes Frederic Sowa
2016-12-22 18:13 ` Jason A. Donenfeld
2016-12-22 18:13 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 19:50 ` Theodore Ts'o
2016-12-22 2:31 ` Jason A. Donenfeld
2016-12-22 2:31 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 2:31 ` Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 4/6] md5: remove from lib and only live in crypto Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 5/6] syncookies: use SipHash in place of SHA1 Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-21 23:02 ` [PATCH v7 6/6] siphash: implement HalfSipHash1-3 for hash tables Jason A. Donenfeld
2016-12-21 23:02 ` [kernel-hardening] " Jason A. Donenfeld
2016-12-22 0:46 ` Andi Kleen
2016-12-22 0:46 ` [kernel-hardening] " Andi Kleen
2016-12-16 20:43 [PATCH v5 1/4] siphash: add cryptographically secure PRF Jason A. Donenfeld
2016-12-16 20:49 Jason A. Donenfeld
2016-12-16 21:25 ` George Spelvin
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