netdev - Re: [PATCH] mac80211: aes_ccm: move struct aead

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Date:   Fri, 14 Oct 2016 15:46:32 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Andy Lutomirski <luto@...capital.net>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        "<netdev@...r.kernel.org>" <netdev@...r.kernel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        "<linux-wireless@...r.kernel.org>" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jouni Malinen <j@...fi>
Subject: Re: [PATCH] mac80211: aes_ccm: move struct aead_req off the stack


> 
> Is the aad[] actually reused? I would assume it only affects the mac
> on encryption, and the verification on decryption but I don't think
> we actually need it back from the crypto routines.

I don't think it's reused.

> Exactly what you said above :-) My patch only touches CCM but as you
> said,
> 
> """
> 'Also there's B_0/J_0 for CCM/GCM, and the 'zero' thing that GMAC
> has.
> """

Ah, but we can/should do the same for the others, no?

johannes