Message-ID: <555787D7.80708@gmail.com>
Date: Sat, 16 May 2015 20:09:27 +0200
From: Corentin LABBE <clabbe.montjoie@gmail.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0
MIME-Version: 1.0
To: herbert@gondor.apana.org.au
CC: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
        ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
        maxime.ripard@free-electrons.com, linux@arm.linux.org.uk,
        davem@davemloft.net, akpm@linux-foundation.org,
        gregkh@linuxfoundation.org, mchehab@osg.samsung.com, joe@perches.com,
        tj@kernel.org, arnd@arndb.de, boris.brezillon@free-electrons.com,
        devicetree@vger.kernel.org, linux-doc@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-crypto@vger.kernel.org, linux-sunxi@googlegroups.com
Subject: Re: [linux-sunxi] Re: [PATCH v9 4/4] crypto: Add Allwinner Security
 System crypto accelerator
References: <1431608341-10936-1-git-send-email-clabbe.montjoie@gmail.com> <1431608341-10936-5-git-send-email-clabbe.montjoie@gmail.com> <20150515065222.GA16808@gondor.apana.org.au>
In-Reply-To: <20150515065222.GA16808@gondor.apana.org.au>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1328
Lines: 38

Le 15/05/2015 08:52, Herbert Xu a écrit :
> On Thu, May 14, 2015 at 02:59:01PM +0200, LABBE Corentin wrote:
>>
>> +int sun4i_hash_export(struct ahash_request *areq, void *out)
>> +{
>> +	struct sun4i_req_ctx *op = ahash_request_ctx(areq);
>> +
>> +	memcpy(out, op, sizeof(struct sun4i_req_ctx));
>> +	return 0;
>> +}
>> +
>> +int sun4i_hash_import(struct ahash_request *areq, const void *in)
>> +{
>> +	struct sun4i_req_ctx *op = ahash_request_ctx(areq);
>> +
>> +	memcpy(op, in, sizeof(struct sun4i_req_ctx));
> 
> This is very wrong.  You're importing an arbitrary ss pointer.  The
> whole point of having an import function instead of just a simple
> memcpy is to deal with such problems.
> 
> Cheers,
> 

Hello

You are right, I have totally mis-understood the export/import functions by just reading them from crypto/md5.c.
Reading them from drivers/crypto/* is better.

Incidental question, I need to use the MD5 IV for export_md5 function, but they are not defined anywhere (unlike SHAxx ones), does this is voluntary or do you will accept a patch for adding them.

Regards

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/