linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Milan Broz <gmazyland@gmail.com>
To: Eric Biggers <ebiggers@kernel.org>,
	"Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
	linux-fscrypt@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	LKML <linux-kernel@vger.kernel.org>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Paul Crowley <paulcrowley@google.com>,
	Greg Kaiser <gkaiser@google.com>,
	Michael Halcrow <mhalcrow@google.com>,
	Samuel Neves <samuel.c.p.neves@gmail.com>,
	Tomer Ashur <tomer.ashur@esat.kuleuven.be>
Subject: Re: [RFC PATCH v2 00/12] crypto: Adiantum support
Date: Sat, 20 Oct 2018 12:26:20 +0200	[thread overview]
Message-ID: <1f65ce09-93b3-f43e-49d5-9d9d6c0bb9e0@gmail.com> (raw)
In-Reply-To: <20181019190411.GB246441@gmail.com>

On 19/10/2018 21:04, Eric Biggers wrote:
> Hi Jason,
> 
> On Fri, Oct 19, 2018 at 05:58:35PM +0200, Jason A. Donenfeld wrote:
>> Hello Eric,
>>
>>> As before, some of these patches conflict with the new "Zinc" crypto
>>> library.  But I don't know when Zinc will be merged, so for now I've
>>> continued to base this patchset on the current 'cryptodev'.
>>
>> I'd appreciate it if you waited to merge this until you can rebase it
>> on top of Zinc. In fact, if you already want to build it on top of
>> Zinc, I'm happy to work with you on that in a shared repo or similar.
>> We can also hash out the details of that in person in Vancouver in a
>> few weeks. I think pushing this in before will create undesirable
>> churn for both of us.
>>
> 
> I won't be at Plumbers, sorry!  For if/when it's needed, I'll start a version of
> this based on Zinc.  The basic requirements are that we need (1) xchacha12 and
> xchacha20 available as 'skciphers' in the crypto API, and (2) the poly1305_core
> functions (see patch 08/12).  In principle, these can be implemented in Zinc.
> The Adiantum template and all the NHPoly1305 stuff will be the same either way.
> (Unless you'll want one or both of those moved to Zinc too.  To be honest, even
> after your explanations I still don't have a clear idea of what is supposed to
> go in Zinc and what isn't...)
> 
> However, for now I'm hesitant to completely abandon the current approach and bet
> the farm on Zinc.  Zinc has a large scope and various controversies that haven't
> yet been fully resolved to everyone's satisfaction, including unclear licenses
> on some of the essential assembly files.  It's not appropriate to grind kernel
> crypto development to grind a halt while everyone waits for Zinc.
> 
> So if Zinc is ready, then it makes sense for it to go first;
> otherwise, it doesn't.  It's not yet clear which is the case.

Does it mean, that if Adiantum is based on Zinc, it can be no longer used
for FDE (dm-crypt)? IOW only file-based encryption is possible?

Adiantum (as in your current git branches on kernel.org) can be used for dm-crypt
without any changes (yes, I played with it :) and with some easy tricks directly
through cryptsetup/LUKS as well.

I think we should have this as an alternative to length-preserving wide-block
cipher modes for FDE.

Milan

  reply	other threads:[~2018-10-20 10:26 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-15 17:54 Eric Biggers
2018-10-15 17:54 ` [RFC PATCH v2 01/12] crypto: chacha20-generic - add HChaCha20 library function Eric Biggers
2018-10-19 14:13   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 02/12] crypto: chacha20-generic - add XChaCha20 support Eric Biggers
2018-10-19 14:24   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 03/12] crypto: chacha20-generic - refactor to allow varying number of rounds Eric Biggers
2018-10-19 14:25   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 04/12] crypto: chacha - add XChaCha12 support Eric Biggers
2018-10-19 14:34   ` Ard Biesheuvel
2018-10-19 18:28     ` Eric Biggers
2018-10-15 17:54 ` [RFC PATCH v2 05/12] crypto: arm/chacha20 - add XChaCha20 support Eric Biggers
2018-10-20  2:29   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 06/12] crypto: arm/chacha20 - refactor to allow varying number of rounds Eric Biggers
2018-10-20  3:35   ` Ard Biesheuvel
2018-10-20  5:26     ` Eric Biggers
2018-10-15 17:54 ` [RFC PATCH v2 07/12] crypto: arm/chacha - add XChaCha12 support Eric Biggers
2018-10-20  3:36   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 08/12] crypto: poly1305 - add Poly1305 core API Eric Biggers
2018-10-20  3:45   ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 09/12] crypto: nhpoly1305 - add NHPoly1305 support Eric Biggers
2018-10-20  4:00   ` Ard Biesheuvel
2018-10-20  5:38     ` Eric Biggers
2018-10-20 15:06       ` Ard Biesheuvel
2018-10-22 18:42         ` Eric Biggers
2018-10-22 22:25           ` Ard Biesheuvel
2018-10-22 22:40             ` Eric Biggers
2018-10-22 22:43               ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 10/12] crypto: arm/nhpoly1305 - add NEON-accelerated NHPoly1305 Eric Biggers
2018-10-20  4:12   ` Ard Biesheuvel
2018-10-20  5:51     ` Eric Biggers
2018-10-20 15:00       ` Ard Biesheuvel
2018-10-15 17:54 ` [RFC PATCH v2 11/12] crypto: adiantum - add Adiantum support Eric Biggers
2018-10-20  4:17   ` Ard Biesheuvel
2018-10-20  7:12     ` Eric Biggers
2018-10-23 10:40       ` Ard Biesheuvel
2018-10-24 22:06         ` Eric Biggers
2018-10-30  8:17           ` Herbert Xu
2018-10-15 17:54 ` [RFC PATCH v2 12/12] fscrypt: " Eric Biggers
2018-10-19 15:58 ` [RFC PATCH v2 00/12] crypto: " Jason A. Donenfeld
2018-10-19 18:19   ` Paul Crowley
2018-10-20  3:24     ` Ard Biesheuvel
2018-10-20  5:22       ` Eric Biggers
     [not found]     ` <2395454e-a0dc-408f-4138-9d15ab5f20b8@esat.kuleuven.be>
2018-10-22 11:20       ` Tomer Ashur
2018-10-19 19:04   ` Eric Biggers
2018-10-20 10:26     ` Milan Broz [this message]
2018-10-20 13:47       ` Jason A. Donenfeld
2018-11-16 21:52       ` Eric Biggers
2018-11-17 10:29         ` Milan Broz
2018-11-19 19:28           ` Eric Biggers
2018-11-19 20:05             ` Milan Broz
2018-11-19 20:30               ` Jason A. Donenfeld
2018-10-21 22:23     ` Eric Biggers
2018-10-21 22:51       ` Jason A. Donenfeld
2018-10-22 17:17         ` Paul Crowley

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1f65ce09-93b3-f43e-49d5-9d9d6c0bb9e0@gmail.com \
    --to=gmazyland@gmail.com \
    --cc=Jason@zx2c4.com \
    --cc=ebiggers@kernel.org \
    --cc=gkaiser@google.com \
    --cc=herbert@gondor.apana.org.au \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=linux-fscrypt@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mhalcrow@google.com \
    --cc=paulcrowley@google.com \
    --cc=samuel.c.p.neves@gmail.com \
    --cc=tomer.ashur@esat.kuleuven.be \
    --subject='Re: [RFC PATCH v2 00/12] crypto: Adiantum support' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).