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From: Herbert Xu <herbert@gondor.apana.org.au>
To: Pascal Van Leeuwen <pvanleeuwen@verimatrix.com>
Cc: "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	Eric Biggers <ebiggers@kernel.org>
Subject: Re: AEAD question
Date: Fri, 9 Aug 2019 12:57:50 +1000
Message-ID: <20190809025750.GA7357@gondor.apana.org.au> (raw)
In-Reply-To: <MN2PR20MB2973743A8887D20AC6104DC0CAD50@MN2PR20MB2973.namprd20.prod.outlook.com>

On Tue, Aug 06, 2019 at 09:20:52AM +0000, Pascal Van Leeuwen wrote:
> 
> The discussion below still lacks some resolution ...
> 
> What is boils down to is: what should an authenc AEAD driver do when it
> gets a setauthsize request of zero?

It must support zero for the special case of digest_null, which
is used to test the IPsec stack.  In other cases I'm OK with
forbidding the use of zero as the IPsec code won't allow a zero
to get through anyway (IOW you can only access this code path
via af_alg).

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

  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-22 12:55 Pascal Van Leeuwen
2019-07-22 16:22 ` Eric Biggers
2019-07-22 22:26   ` Pascal Van Leeuwen
2019-08-06  9:20     ` Pascal Van Leeuwen
2019-08-09  2:57       ` Herbert Xu [this message]
  -- strict thread matches above, loose matches on Subject: below --
2016-10-26 16:17 AEAD Question Juan Pablo Nariño Mendoza
2016-10-26 16:32 ` Stephan Mueller
2016-10-27  8:05   ` Juan Pablo Nariño Mendoza

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