linux-kernel - Re: [PATCH] crypto: talitos - fix skcipher failure due to wrong output IV

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Message-ID: <29db3f20-f931-efc6-02a8-fe160ab8b484@c-s.fr>
Date:   Wed, 15 May 2019 20:49:48 +0200
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Horia Geanta <horia.geanta@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
Cc:     "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH] crypto: talitos - fix skcipher failure due to wrong
 output IV



Le 15/05/2019 à 16:05, Horia Geanta a écrit :
> On 5/15/2019 3:29 PM, Christophe Leroy wrote:
>> Selftests report the following:
>>
>> [    2.984845] alg: skcipher: cbc-aes-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
>> [    2.995377] 00000000: 3d af ba 42 9d 9e b4 30 b4 22 da 80 2c 9f ac 41
>> [    3.032673] alg: skcipher: cbc-des-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
>> [    3.043185] 00000000: fe dc ba 98 76 54 32 10
>> [    3.063238] alg: skcipher: cbc-3des-talitos encryption test failed (wrong output IV) on test vector 0, cfg="in-place"
>> [    3.073818] 00000000: 7d 33 88 93 0f 93 b2 42
>>
>> This above dumps show that the actual output IV is indeed the input IV.
>> This is due to the IV not being copied back into the request.
>>
>> This patch fixes that.
>>
>> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> Reviewed-by: Horia Geantă <horia.geanta@....com>

It's missing a Fixes: tag and a Cc: to stable.

I'll resend tomorrow.

> 
> While here, could you please check ecb mode (which by definition does not have
> an IV) is behaving correctly?
> Looking in driver_algs[] list of crypto algorithms supported by talitos,
> ecb(aes,des,3des) are declared with ivsize != 0.

According to /proc/crypto, test are passed for ecb.

Christophe

> 
> Thanks,
> Horia
>