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Subject: Re: [PATCH 0/5] crypto: Implement cmac based on cbc skcipher
To:     Herbert Xu <herbert@gondor.apana.org.au>,
        Ard Biesheuvel <ardb@kernel.org>
Cc:     Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        Eric Biggers <ebiggers@kernel.org>
References: <20200802090616.1328-1-ardb@kernel.org>
 <20200818082410.GA24497@gondor.apana.org.au>
 <CAMj1kXFOZJFUR0N+6i2O4XGZ462Mcs8pq7y_MYScfLf-Tfy3QQ@mail.gmail.com>
 <20200818135128.GA25652@gondor.apana.org.au>
From:   Ben Greear <greearb@candelatech.com>
Organization: Candela Technologies
Message-ID: <2aad9569-877e-4398-88ef-e40d9bbf7656@candelatech.com>
Date:   Tue, 18 Aug 2020 06:56:12 -0700
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On 8/18/20 6:51 AM, Herbert Xu wrote:
> On Tue, Aug 18, 2020 at 10:31:39AM +0200, Ard Biesheuvel wrote:
>>
>> What do you mean? You cannot implement cbcmac using a cbc skcipher
>> unless you provide a scratch buffer of arbitrary size as the
>> destination, in order to capture the skcipher output IV as the MAC.
> 
> Please have a look at patch 6.  The trick is to use an SG list
> chained to itself.

Herbert, thanks for working on this.  If I apply the patches you posted,
that is expected to provide wifi aes decryption speedup similar to what
the original patch I sent does?  Or, are additional patches needed?

Thanks,
Ben


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com