From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: Horia Geanta <horia.geanta@nxp.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Pascal Van Leeuwen <pvanleeuwen@verimatrix.com>,
Milan Broz <gmazyland@gmail.com>,
"dm-devel@redhat.com" <dm-devel@redhat.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
Subject: Re: [dm-devel] xts fuzz testing and lack of ciphertext stealing support
Date: Fri, 9 Aug 2019 20:49:13 +0300 [thread overview]
Message-ID: <CAKv+Gu-_WObNm+ySXDWjhqe2YPzajX83MofuF-WKPSdLg5t4Ew@mail.gmail.com> (raw)
In-Reply-To: <VI1PR0402MB3485F94AECC495F133F6B3D798D60@VI1PR0402MB3485.eurprd04.prod.outlook.com>
On Fri, 9 Aug 2019 at 10:44, Horia Geanta <horia.geanta@nxp.com> wrote:
>
> On 8/9/2019 9:45 AM, Ard Biesheuvel wrote:
> > On Fri, 9 Aug 2019 at 05:48, Herbert Xu <herbert@gondor.apana.org.au> wrote:
> >>
> >> On Thu, Aug 08, 2019 at 06:01:49PM +0000, Horia Geanta wrote:
> >>>
> >>> -- >8 --
> >>>
> >>> Subject: [PATCH] crypto: testmgr - Add additional AES-XTS vectors for covering
> >>> CTS (part II)
> >>
> >> Patchwork doesn't like it when you do this and it'll discard
> >> your patch. To make it into patchwork you need to put the new
> >> Subject in the email headers.
> >>
> >
> > IMO, pretending that your XTS implementation is compliant by only
> I've never said that.
> Some parts are compliant, some are not.
>
> > providing test vectors with the last 8 bytes of IV cleared is not the
> > right fix for this issue. If you want to be compliant, you will need
> It's not a fix.
> It's adding test vectors which are not provided in the P1619 standard,
> where "data unit sequence number" is at most 5B.
>
Indeed. But I would prefer not to limit ourselves to 5 bytes of sector
numbers in the test vectors. However, we should obviously not add test
vectors that are known to cause breakages on hardware that works fine
in practice.
> > to provide a s/w fallback for these cases.
> >
> Yes, the plan is to:
>
> -add 16B IV support for caam versions supporting it - caam Era 9+,
> currently deployed in lx2160a and ls108a
>
> -remove current 8B IV support and add s/w fallback for affected caam versions
> I'd assume this could be done dynamically, i.e. depending on IV provided
> in the crypto request to use either the caam engine or s/w fallback.
>
Yes. If the IV received from the caller has bytes 8..15 cleared, you
use the limited XTS h/w implementation, otherwise you fall back to
xts(ecb-aes-caam..).
next prev parent reply other threads:[~2019-08-09 17:49 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-16 17:46 xts fuzz testing and lack of ciphertext stealing support Horia Geanta
2019-07-16 22:16 ` Eric Biggers
2019-07-17 17:09 ` Horia Geanta
2019-07-17 17:28 ` Eric Biggers
2019-07-17 18:08 ` Ard Biesheuvel
2019-07-18 6:52 ` Herbert Xu
2019-07-18 7:15 ` Ard Biesheuvel
2019-07-18 7:21 ` Herbert Xu
2019-07-18 7:28 ` Ard Biesheuvel
2019-07-18 7:50 ` Herbert Xu
2019-07-18 7:40 ` Milan Broz
2019-07-18 10:40 ` Pascal Van Leeuwen
2019-07-18 11:19 ` Milan Broz
2019-07-18 15:27 ` Herbert Xu
2019-07-20 6:58 ` [dm-devel] " Eric Biggers
2019-07-20 7:35 ` Milan Broz
2019-07-21 9:50 ` Ard Biesheuvel
2019-07-22 9:44 ` Pascal Van Leeuwen
2019-07-22 16:43 ` Ard Biesheuvel
2019-07-22 22:46 ` Pascal Van Leeuwen
2019-07-24 12:23 ` Pascal Van Leeuwen
2019-07-24 12:50 ` Pascal Van Leeuwen
2019-07-24 16:10 ` Pascal Van Leeuwen
2019-07-25 6:22 ` Ard Biesheuvel
2019-07-25 7:49 ` Pascal Van Leeuwen
2019-07-25 8:01 ` Ard Biesheuvel
2019-07-26 10:31 ` Pascal Van Leeuwen
2019-07-26 19:59 ` Horia Geanta
2019-07-26 21:43 ` Pascal Van Leeuwen
2019-07-27 5:39 ` Ard Biesheuvel
2019-07-27 12:56 ` Pascal Van Leeuwen
2019-07-27 16:04 ` Milan Broz
2019-08-04 8:36 ` Ard Biesheuvel
[not found] ` <20f4832e-e3af-e3c2-d946-13bf8c367a60@nxp.com>
2019-08-07 15:51 ` Horia Geanta
2019-08-07 20:57 ` Pascal Van Leeuwen
2019-08-08 14:50 ` Horia Geanta
2019-08-09 8:35 ` Pascal Van Leeuwen
2019-08-08 13:43 ` Pascal Van Leeuwen
2019-08-08 18:01 ` Horia Geanta
2019-08-09 2:48 ` Herbert Xu
2019-08-09 6:45 ` Ard Biesheuvel
2019-08-09 7:44 ` Horia Geanta
2019-08-09 17:49 ` Ard Biesheuvel [this message]
2019-08-09 20:57 ` Pascal Van Leeuwen
2019-08-10 4:39 ` Ard Biesheuvel
2019-08-11 11:12 ` Milan Broz
2019-08-11 20:34 ` Eric Biggers
2019-08-11 21:39 ` Pascal Van Leeuwen
2019-08-11 21:29 ` Pascal Van Leeuwen
2019-08-12 4:51 ` Herbert Xu
2019-08-11 21:15 ` Pascal Van Leeuwen
2019-08-11 22:24 ` Ard Biesheuvel
2019-08-12 1:04 ` Pascal Van Leeuwen
2019-07-18 15:29 ` Herbert Xu
2019-07-18 15:43 ` Pascal Van Leeuwen
2019-07-18 15:51 ` Herbert Xu
2019-07-18 16:19 ` Ard Biesheuvel
2019-07-18 16:22 ` Herbert Xu
2019-07-18 17:03 ` Pascal Van Leeuwen
2019-07-19 5:34 ` Ard Biesheuvel
2019-07-19 7:29 ` Pascal Van Leeuwen
2019-07-19 17:14 ` Ard Biesheuvel
2019-07-19 20:07 ` Pascal Van Leeuwen
2019-07-18 16:35 ` Pascal Van Leeuwen
2019-07-19 1:47 ` Herbert Xu
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