linux-kernel - Re: [PATCH 2/2] chacha20poly1305: Skip encryption/decryption for 0-len

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Message-ID: <20151209121923.GD27962@gondor.apana.org.au>
Date:	Wed, 9 Dec 2015 20:19:23 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Jason A. Donenfeld" <Jason@...c4.com>
Cc:	davem@...emloft.net, linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
	martin@...ongswan.org, stable@...r.kernel.org
Subject: Re: [PATCH 2/2] chacha20poly1305: Skip encryption/decryption for
 0-len

On Sun, Dec 06, 2015 at 02:51:38AM +0100, Jason A. Donenfeld wrote:
> If the length of the plaintext is zero, there's no need to waste cycles
> on encryption and decryption. Using the chacha20poly1305 construction
> for zero-length plaintexts is a common way of using a shared encryption
> key for AAD authentication.
> 
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
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