From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Andrew Lutomirski <luto@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Netdev <netdev@vger.kernel.org>,
David Miller <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Samuel Neves <sneves@dei.uc.pt>,
Jean-Philippe Aumasson <jeanphilippe.aumasson@gmail.com>,
Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
Subject: Re: [PATCH net-next v3 02/17] zinc: introduce minimal cryptography library
Date: Thu, 13 Sep 2018 17:07:08 +0200 [thread overview]
Message-ID: <CAKv+Gu-CVsXQmx1BZQMe__LREvWEigd2FdoA2ErLu1ky6gzHtw@mail.gmail.com> (raw)
In-Reply-To: <CAHmME9pp8HoisxQWL_eELR-ziiBii-7mcA=oF9UF-WMucewX5w@mail.gmail.com>
On 13 September 2018 at 16:18, Jason A. Donenfeld <Jason@zx2c4.com> wrote:
> On Thu, Sep 13, 2018 at 1:45 AM Andy Lutomirski <luto@kernel.org> wrote:
>> I'm not convinced that there's any real need for *all* crypto
>> algorithms to move into lib/zinc or to move at all. As I see it,
>> there are two classes of crypto algorithms in the kernel:
>>
>> a) Crypto that is used by code that chooses its algorithm statically
>> and wants synchronous operations. These include everything in
>> drivers/char/random.c, but also a bunch of various networking things
>> that are hardcoded and basically everything that uses stack buffers.
>> (This means it includes all the code that I broke when I did
>> VMAP_STACK. Sign.)
>
> Right, exactly. This is what will wind up using Zinc. I'm working on
> an example usage of this for v4 of the patch submission, which you can
> ogle in a preview here if you're curious:
>
> https://git.zx2c4.com/linux-dev/commit/?h=big_key_rewrite
>
> 28 insertions, 206 deletions :-D
>
I must say, that actually looks pretty good.
>> b) Crypto that is used dynamically. This includes dm-crypt
>> (aes-xts-plain64, aes-cbc-essiv, etc), all the ALG_IF interfaces, a
>> lot of IPSEC stuff, possibly KCM, and probably many more. These will
>> get comparatively little benefit from being converted to a zinc-like
>> interface. For some of these cases, it wouldn't make any sense at all
>> to convert them. Certainly the ones that do async hardware crypto
>> using DMA engines will never look at all like zinc, even under the
>> hood.
>
> Right, this is what the crypto API will continue to be used for.
>
>
>> I think that, as a short-term goal, it makes a lot of sense to have
>> implementations of the crypto that *new* kernel code (like Wireguard)
>> wants to use in style (a) that live in /lib, and it obviously makes
>> sense to consolidate their implementations with the crypto/
>> implementations in a timely manner. As a medium-term goal, adding
>> more algorithms as needed for things that could use the simpler APIs
>> (Bluetooth, perhaps) would make sense.
>
> Agreed 100%. With regards to "consolidate their implementations" --
> I've actually already done this after your urging yesterday, and so
> that will be a part of v4.
>
>> But I see no reason at all that /lib should ever contain a grab-bag of
>> crypto implementations just for the heck of it. They should have real
>> in-kernel users IMO. And this means that there will probably always
>> be some crypto implementations in crypto/ for things like aes-xts.
>
> Right, precisely.
>
> Jason
next prev parent reply other threads:[~2018-09-13 15:07 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-11 1:08 [PATCH net-next v3 00/17] WireGuard: Secure Network Tunnel Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 01/17] asm: simd context helper API Jason A. Donenfeld
2018-09-12 6:14 ` Kevin Easton
2018-09-12 18:10 ` Jason A. Donenfeld
2018-09-13 5:03 ` Kevin Easton
2018-09-13 13:52 ` Jason A. Donenfeld
2018-09-13 13:53 ` Jason A. Donenfeld
2018-09-15 19:58 ` Andy Lutomirski
2018-09-15 20:01 ` Jason A. Donenfeld
2018-09-17 13:14 ` Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 02/17] zinc: introduce minimal cryptography library Jason A. Donenfeld
2018-09-11 10:08 ` Ard Biesheuvel
2018-09-11 14:56 ` Greg Kroah-Hartman
2018-09-11 21:47 ` Eric Biggers
2018-09-11 22:02 ` Jason A. Donenfeld
2018-09-11 23:30 ` Andrew Lunn
2018-09-11 23:57 ` David Miller
2018-09-12 0:02 ` Jason A. Donenfeld
2018-09-17 4:09 ` Andy Lutomirski
2018-09-17 4:45 ` David Miller
2018-09-17 14:55 ` Andy Lutomirski
2018-09-17 14:59 ` Jason A. Donenfeld
2018-09-17 5:07 ` Jason A. Donenfeld
2018-09-17 14:53 ` Andy Lutomirski
2018-09-17 14:59 ` Jason A. Donenfeld
2018-09-17 16:24 ` Jason A. Donenfeld
2018-09-18 16:06 ` Ard Biesheuvel
2018-09-18 16:45 ` Jason A. Donenfeld
2018-09-17 5:26 ` Ard Biesheuvel
2018-09-17 14:51 ` Andy Lutomirski
2018-09-17 15:28 ` Jason A. Donenfeld
2018-09-17 16:06 ` Andy Lutomirski
2018-09-17 16:17 ` Jason A. Donenfeld
2018-09-17 15:31 ` Jason A. Donenfeld
2018-09-17 16:07 ` Andy Lutomirski
2018-09-17 16:16 ` Jason A. Donenfeld
2018-09-17 16:18 ` Andy Lutomirski
2018-09-18 0:56 ` Jason A. Donenfeld
2018-09-17 15:52 ` Jason A. Donenfeld
2018-09-18 4:21 ` Herbert Xu
2018-09-18 4:26 ` Jason A. Donenfeld
2018-09-18 18:53 ` Ard Biesheuvel
2018-09-18 20:36 ` Jason A. Donenfeld
2018-09-19 16:55 ` Ard Biesheuvel
2018-09-11 22:16 ` Andy Lutomirski
2018-09-11 22:18 ` Jason A. Donenfeld
2018-09-11 23:01 ` Andy Lutomirski
2018-09-12 0:01 ` Jason A. Donenfeld
2018-09-12 4:29 ` Jason A. Donenfeld
2018-09-11 21:22 ` Jason A. Donenfeld
2018-09-12 22:56 ` Ard Biesheuvel
2018-09-12 23:45 ` Andy Lutomirski
2018-09-13 5:41 ` Ard Biesheuvel
2018-09-13 14:32 ` Jason A. Donenfeld
2018-09-13 15:42 ` Ard Biesheuvel
2018-09-13 15:58 ` Jason A. Donenfeld
2018-09-14 6:15 ` Ard Biesheuvel
2018-09-14 9:53 ` Jason A. Donenfeld
2018-09-13 6:39 ` Milan Broz
2018-09-13 14:34 ` Jason A. Donenfeld
2018-09-13 15:26 ` Andy Lutomirski
2018-09-13 14:18 ` Jason A. Donenfeld
2018-09-13 15:07 ` Ard Biesheuvel [this message]
2018-09-13 14:15 ` Jason A. Donenfeld
2018-09-13 15:04 ` Ard Biesheuvel
2018-09-13 15:45 ` Jason A. Donenfeld
2018-09-11 22:08 ` Eric Biggers
2018-09-12 18:16 ` Jason A. Donenfeld
2018-09-12 18:19 ` Ard Biesheuvel
2018-09-12 18:34 ` Eric Biggers
2018-09-14 6:21 ` Ard Biesheuvel
2018-09-11 1:08 ` [PATCH net-next v3 03/17] zinc: ChaCha20 generic C implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 04/17] zinc: ChaCha20 ARM and ARM64 implementations Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 05/17] zinc: ChaCha20 x86_64 implementation Jason A. Donenfeld
2018-09-11 8:22 ` Thomas Gleixner
2018-09-11 9:00 ` Samuel Neves
2018-09-11 9:09 ` Thomas Gleixner
2018-09-11 21:12 ` Jason A. Donenfeld
2018-09-11 21:27 ` Thomas Gleixner
2018-09-11 21:28 ` Jason A. Donenfeld
2018-09-11 21:48 ` Eric Biggers
2018-09-11 22:04 ` Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 06/17] zinc: ChaCha20 MIPS32r2 implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 07/17] zinc: Poly1305 generic C implementation and selftest Jason A. Donenfeld
2018-09-11 1:17 ` Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 07/17] zinc: Poly1305 generic C implementations " Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 08/17] zinc: Poly1305 ARM and ARM64 implementations Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 09/17] zinc: Poly1305 x86_64 implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 10/17] zinc: Poly1305 MIPS32r2 and MIPS64 implementations Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 11/17] zinc: ChaCha20Poly1305 construction and selftest Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 12/17] zinc: BLAKE2s generic C implementation " Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 13/17] zinc: BLAKE2s x86_64 implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 14/17] zinc: Curve25519 generic C implementations and selftest Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 15/17] zinc: Curve25519 ARM implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 16/17] zinc: Curve25519 x86_64 implementation Jason A. Donenfeld
2018-09-11 1:08 ` [PATCH net-next v3 17/17] net: WireGuard secure network tunnel Jason A. Donenfeld
2018-09-11 12:59 ` kbuild test robot
2018-09-11 20:53 ` Jason A. Donenfeld
2018-09-11 13:17 ` kbuild test robot
2018-09-11 21:05 ` Jason A. Donenfeld
2018-09-11 13:30 ` Andrew Lunn
2018-09-11 21:08 ` Jason A. Donenfeld
2018-09-11 21:55 ` Andrew Lunn
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