linux-kernel - Re: [PATCH v2 02/20] crypto: testmgr to use CRYPTO_ALG

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Date:	Mon, 30 Mar 2015 21:31:58 +0200
From:	Stephan Mueller <smueller@...onox.de>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/20] crypto: testmgr to use CRYPTO_ALG_INTERNAL

Am Dienstag, 31. März 2015, 00:10:34 schrieb Herbert Xu:

Hi Herbert,

> On Fri, Mar 27, 2015 at 11:50:42PM +0100, Stephan Mueller wrote:
> > If a cipher allocation fails with -ENOENT, the testmgr now retries
> > to allocate the cipher with CRYPTO_ALG_INTERNAL flag.
> > 
> > As all ciphers, including the internal ciphers will be processed by
> > the testmgr, it needs to be able to allocate those ciphers.
> > 
> > Signed-off-by: Stephan Mueller <smueller@...onox.de>
> > ---
> > 
> >  crypto/testmgr.c | 22 ++++++++++++++++++++++
> >  1 file changed, 22 insertions(+)
> > 
> > diff --git a/crypto/testmgr.c b/crypto/testmgr.c
> > index 1f879ad..609bafa 100644
> > --- a/crypto/testmgr.c
> > +++ b/crypto/testmgr.c
> > @@ -1506,6 +1506,9 @@ static int alg_test_aead(const struct alg_test_desc
> > *desc, const char *driver,> 
> >  	int err = 0;
> >  	
> >  	tfm = crypto_alloc_aead(driver, type, mask);
> > 
> > +	if (PTR_ERR(tfm) == -ENOENT)
> > +		tfm = crypto_alloc_aead(driver, type | CRYPTO_ALG_INTERNAL,
> > +					mask | CRYPTO_ALG_INTERNAL);
> 
> We need to be able to say give me an algorithm regardless of the
> INTERNAL bit.  How about treating (type & CRYPTO_ALG_INTERNAL) &&
> !(mask & CRYPTO_ALG_INTERNAL) as that special case?
> 
> So in patch 1 you would do
> 
> 	if (!((type | mask) & CRYPTO_ALG_INTERNAL))
> 		mask |= CRYPTO_ALG_INTERNAL;

Thank you for the hint. It works and I will release a patch shortly.
> 
> Thanks,


-- 
Ciao
Stephan
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