From: Valentin Ciocoi Radulescu <valentin.ciocoi@nxp.com>
To: Horia Geanta <horia.geanta@nxp.com>,
Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>,
Aymen Sghaier <aymen.sghaier@nxp.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>
Subject: RE: [PATCH v2] crypto: caam/qi2 - fix chacha20 data size error
Date: Fri, 28 Feb 2020 11:04:04 +0000 [thread overview]
Message-ID: <VI1PR04MB6031FD0D117FF3DD7C4B6289FEE80@VI1PR04MB6031.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <20200228065123.13216-1-horia.geanta@nxp.com>
> -----Original Message-----
> From: Horia Geantă <horia.geanta@nxp.com>
> Sent: Friday, February 28, 2020 08:51
> To: Herbert Xu <herbert@gondor.apana.org.au>
> Cc: David S. Miller <davem@davemloft.net>; Aymen Sghaier
> <aymen.sghaier@nxp.com>; Valentin Ciocoi Radulescu
> <valentin.ciocoi@nxp.com>; linux-crypto@vger.kernel.org; dl-linux-imx
> <linux-imx@nxp.com>
> Subject: [PATCH v2] crypto: caam/qi2 - fix chacha20 data size error
>
> HW generates a Data Size error for chacha20 requests that are not
> a multiple of 64B, since algorithm state (AS) does not have
> the FINAL bit set.
>
> Since updating req->iv (for chaining) is not required,
> modify skcipher descriptors to set the FINAL bit for chacha20.
>
> [Note that for skcipher decryption we know that ctx1_iv_off is 0,
> which allows for an optimization by not checking algorithm type,
> since append_dec_op1() sets FINAL bit for all algorithms except AES.]
>
> Also drop the descriptor operations that save the IV.
> However, in order to keep code logic simple, things like
> S/G tables generation etc. are not touched.
>
> Cc: <stable@vger.kernel.org> # v5.3+
> Fixes: 334d37c9e263 ("crypto: caam - update IV using HW support")
> Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Tested-by: Valentin Ciocoi Radulescu <valentin.ciocoi@nxp.com>
Tested on LX2160ARDB board with cryptodev-2.6 tree:
root@TinyLinux:~# cat /proc/crypto | grep chacha20-caam -A 5
driver : chacha20-caam-qi2
module : kernel
priority : 2000
refcnt : 1
selftest : passed
internal : no
next prev parent reply other threads:[~2020-02-28 11:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 6:51 [PATCH v2] crypto: caam/qi2 - fix chacha20 data size error Horia Geantă
2020-02-28 11:04 ` Valentin Ciocoi Radulescu [this message]
2020-03-06 1:51 ` Herbert Xu
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