linux-kernel - Re: [PATCH v5 3/8] crypto: AF

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Message-ID: <20141223202401.GA2474@gondor.apana.org.au>
Date:	Wed, 24 Dec 2014 07:24:01 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Daniel Borkmann <dborkman@...hat.com>,
	'Quentin Gouchet' <quentin.gouchet@...il.com>,
	'LKML' <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v5 3/8] crypto: AF_ALG: add AEAD support

On Tue, Dec 23, 2014 at 03:52:27PM +0100, Stephan Mueller wrote:
> Am Dienstag, 23. Dezember 2014, 22:56:26 schrieb Herbert Xu:
>
> > In fact AEAD is rather awkward because you need to do everything
> > in one go.  Perhaps we could adapt our kernel interface to allow
> > partial AEAD operations?
> 
> 
> I am not sure what you are referring to. The invocation does not need to be in 
> one go. You can have arbitrary number of sendmsg calls. But all input data 
> needs to be supplied before you call recvmsg.

What I mean is that unlike skcipher we cannot precede until we
have the complete input.  So you cannot begin recvmsg until all
input has been sent.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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