linux-kernel - Re: [PATCH 9/9] Disable ccm and ccm4309 in fips mod

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Message-ID: <20141106150326.GC3300@gondor.apana.org.au>
Date:	Thu, 6 Nov 2014 23:03:26 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	"Leonidas S. Barbosa" <leosilva@...ux.vnet.ibm.com>
Cc:	linux-crypto@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org,
	Marcelo Henrique Cerri <mhcerri@...ux.vnet.ibm.com>,
	Fionnuala Gunter <fin@...ux.vnet.ibm.com>
Subject: Re: [PATCH 9/9] Disable ccm and ccm4309 in fips mod

On Tue, Oct 28, 2014 at 03:51:54PM -0200, Leonidas S. Barbosa wrote:
> NX CCM has not support to keys larger than 128 neither our hardware.
> In cases where a system is running in fips mode enabled a tcrypt test will
> crash the system in a kernel panic call.
> This patch disable, for now, CCM's algorithms in fips mode to avoid this.
> 
> Signed-off-by: Leonidas S. Barbosa <leosilva@...ux.vnet.ibm.com>

For cases like this you should be using a software fallback rather
than just failing.  See padlock-sha for an example.

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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