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From: Krzysztof Kozlowski <krzk@kernel.org>
To: c.manszewski@samsung.com
Cc: linux-crypto@vger.kernel.org, vz@mleia.com,
	k.konieczny@partner.samsung.com, herbert@gondor.apana.org.au,
	davem@davemloft.net,
	"linux-samsung-soc@vger.kernel.org" 
	<linux-samsung-soc@vger.kernel.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] crypto: s5p-sss: Add aes-ctr support
Date: Mon, 17 Sep 2018 15:45:12 +0200	[thread overview]
Message-ID: <CAJKOXPfBnS-8odFaY35aBeOWbRWYDCCn40wM6tTAua021xytLg@mail.gmail.com> (raw)
In-Reply-To: <20180913075901eucas1p2dfb1900b71d70ee64a9d51eb4c8b61fd~T5q-ljNj41220012200eucas1p2N@eucas1p2.samsung.com>

On Thu, 13 Sep 2018 at 09:59, Christoph Manszewski
<c.manszewski@samsung.com> wrote:
>
> Add support for aes counter(ctr) block cipher mode of operation for
> Exynos Hardware. In contrast to ecb and cbc modes, aes-ctr allows
> encyption/decryption for request sizes not being a multiple of 16(bytes).
>
> Hardware requires block sizes being a multiple of 16(bytes). In order to
> achieve this, copy request source and destination memory, and align it's size
> to 16. That way hardware processes additional bytes, that are omitted
> when copying the result back to its original destination.
>
> Tested on Odroid-U3 with Exynos 4412 CPU, kernel 4.19-rc2 with crypto
> run-time self test testmgr and with tcrypt module:
> insmod tcrypt.ko sec=1 mode=500.
>
> Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
> ---
>  drivers/crypto/s5p-sss.c | 45 ++++++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 40 insertions(+), 5 deletions(-)
>

Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>

Best regards,
Krzysztof

      reply	other threads:[~2018-09-17 13:45 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1536825522-6027-1-git-send-email-c.manszewski@samsung.com>
     [not found] ` <CGME20180913075857eucas1p2cbccf3cd452a23eb46a234acb37b3a44@eucas1p2.samsung.com>
2018-09-13  7:58   ` [PATCH 1/4] crypto: s5p-sss: Fix race in error handling Christoph Manszewski
2018-09-17 12:59     ` Krzysztof Kozlowski
     [not found] ` <CGME20180913075858eucas1p1f528fd0776c32f1c10a3e46f8f2bacd0@eucas1p1.samsung.com>
2018-09-13  7:58   ` [PATCH 2/4] crypto: s5p-sss: Fix whitespace issues Christoph Manszewski
2018-09-17 13:05     ` Krzysztof Kozlowski
     [not found] ` <CGME20180913075859eucas1p2bba2f5ab32fea5c4f832abaacaed6c8b@eucas1p2.samsung.com>
2018-09-13  7:58   ` [PATCH 3/4] crypto: s5p-sss: Minor code cleanup Christoph Manszewski
2018-09-17 13:13     ` Krzysztof Kozlowski
     [not found] ` <CGME20180913075901eucas1p2dfb1900b71d70ee64a9d51eb4c8b61fd@eucas1p2.samsung.com>
2018-09-13  7:58   ` [PATCH 4/4] crypto: s5p-sss: Add aes-ctr support Christoph Manszewski
2018-09-17 13:45     ` Krzysztof Kozlowski [this message]

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