linux-crypto.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Herbert Xu <herbert@gondor.apana.org.au>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-crypto@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, ebiggers@kernel.org,
	ardb@kernel.org, smueller@chronox.de
Subject: Re: [RFC/RFT PATCH 0/2] crypto: add CTS output IVs for arm64 and testmgr
Date: Thu, 28 May 2020 17:33:49 +1000	[thread overview]
Message-ID: <20200528073349.GA32566@gondor.apana.org.au> (raw)
In-Reply-To: <20200519190211.76855-1-ardb@kernel.org>

Ard Biesheuvel <ardb@kernel.org> wrote:
> Stephan reports that the arm64 implementation of cts(cbc(aes)) deviates
> from the generic implementation in what it returns as the output IV. So
> fix this, and add some test vectors to catch other non-compliant
> implementations.
> 
> Stephan, could you provide a reference for the NIST validation tool and
> how it flags this behaviour as non-compliant? Thanks.

I think our CTS and XTS are both broken with respect to af_alg.

The reason we use output IVs in general is to support chaining
which is required by algif_skcipher to break up large requests
into smaller ones.

For CTS and XTS that simply doesn't work.  So we should fix this
by changing algif_skcipher to not do chaining (and hence drop
support for large requests like algif_aead) for algorithms like
CTS/XTS.

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

  parent reply	other threads:[~2020-05-28  7:33 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-19 19:02 [RFC/RFT PATCH 0/2] crypto: add CTS output IVs for arm64 and testmgr Ard Biesheuvel
2020-05-19 19:02 ` [RFC/RFT PATCH 1/2] crypto: arm64/aes - align output IV with generic CBC-CTS driver Ard Biesheuvel
2020-05-19 19:02 ` [RFC/RFT PATCH 2/2] crypto: testmgr - add output IVs for AES-CBC with ciphertext stealing Ard Biesheuvel
2020-05-19 19:04 ` [RFC/RFT PATCH 0/2] crypto: add CTS output IVs for arm64 and testmgr Ard Biesheuvel
2020-05-20  6:03 ` Stephan Mueller
2020-05-20  6:40   ` Ard Biesheuvel
2020-05-20  6:47     ` Stephan Mueller
2020-05-20  6:54       ` Ard Biesheuvel
2020-05-20  7:01         ` Stephan Mueller
2020-05-20  7:09           ` Ard Biesheuvel
2020-05-21 13:01             ` Gilad Ben-Yossef
2020-05-21 13:23               ` Ard Biesheuvel
2020-05-23 18:52                 ` Stephan Müller
2020-05-23 22:40                   ` Ard Biesheuvel
2020-05-28  7:33 ` Herbert Xu [this message]
2020-05-28  8:33   ` Ard Biesheuvel
2020-05-29  8:05     ` Herbert Xu
2020-05-29  8:20       ` Ard Biesheuvel
2020-05-29 11:51         ` Herbert Xu
2020-05-29 12:00           ` Ard Biesheuvel
2020-05-29 12:02             ` Herbert Xu
2020-05-29 13:10               ` Ard Biesheuvel
2020-05-29 13:19                 ` Herbert Xu
2020-05-29 13:41                   ` Ard Biesheuvel
2020-05-29 13:42                     ` Herbert Xu
2020-06-12 12:06                       ` [PATCH 0/3] crypto: skcipher - Add support for no chaining and partial chaining Herbert Xu
2020-06-12 12:07                         ` [PATCH 1/3] crypto: skcipher - Add final chunk size field for chaining Herbert Xu
2020-06-12 12:15                           ` Stephan Mueller
2020-06-12 12:16                             ` Herbert Xu
2020-06-12 12:21                               ` [v2 PATCH 0/3] crypto: skcipher - Add support for no chaining and partial chaining Herbert Xu
2020-06-12 12:21                                 ` [v2 PATCH 1/3] crypto: skcipher - Add final chunk size field for chaining Herbert Xu
2020-06-12 12:21                                 ` [v2 PATCH 2/3] crypto: algif_skcipher - Add support for fcsize Herbert Xu
2020-06-12 12:21                                 ` [v2 PATCH 3/3] crypto: cts - Add support for chaining Herbert Xu
2020-06-12 16:10                                 ` [v2 PATCH 0/3] crypto: skcipher - Add support for no chaining and partial chaining Ard Biesheuvel
2020-06-15  7:30                                   ` Herbert Xu
2020-06-15  7:50                                     ` Ard Biesheuvel
2020-06-15 18:50                                       ` Eric Biggers
2020-06-15 23:18                                         ` Ard Biesheuvel
2020-06-16 11:04                                         ` Herbert Xu
2020-06-16 16:53                                           ` Eric Biggers
2020-06-12 12:07                         ` [PATCH 2/3] crypto: algif_skcipher - Add support for fcsize Herbert Xu
2020-06-12 12:07                         ` [PATCH 3/3] crypto: cts - Add support for chaining Herbert Xu

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=20200528073349.GA32566@gondor.apana.org.au \
    --to=herbert@gondor.apana.org.au \
    --cc=ardb@kernel.org \
    --cc=ebiggers@kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-crypto@vger.kernel.org \
    --cc=smueller@chronox.de \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body.
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).