linux-kernel - Re: [PATCH] crypto: print self-test pass notices in fips mode

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Date:	Wed, 29 Apr 2009 09:21:53 -0400
From:	Jarod Wilson <jarod@...hat.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH] crypto: print self-test pass notices in fips mode

On Wednesday 29 April 2009 09:18:17 Herbert Xu wrote:
> On Tue, Apr 28, 2009 at 09:21:35PM -0400, Jarod Wilson wrote:
> >
> > diff --git a/crypto/testmgr.c b/crypto/testmgr.c
> > index 39ffa69..d0cc85c 100644
> > --- a/crypto/testmgr.c
> > +++ b/crypto/testmgr.c
> > @@ -2149,6 +2149,10 @@ notest:
> >  test_done:
> >  	if (fips_enabled && rc)
> >  		panic("%s: %s alg self test failed in fips mode!\n", driver, alg);
> > +	/* fips mode requires we print out self-test success notices */
> > +	if (fips_enabled && !rc && strncmp(alg, "ctr(aes", 7))
> > +		printk(KERN_INFO "alg: self-tests for %s (%s) passed\n",
> > +		       driver, alg);
> 
> What is this strncmp crap for?

To avoid claiming we successfully self-tested ctr(aes) when its
not actually directly testable. Was intended to go sort of hand
in hand with the other patch to suppress 'no self test' messages
for ctr(aes) when in fips mode. Of course, since at this point,
we've run ecb(aes), and that's what's suggested as the way to
test ctr(aes)[*], perhaps we don't need to
suppress it.

[*] well, along with the sign-off from the lab that the counter
code is acceptable

-- 
Jarod Wilson
jarod@...hat.com
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