lkml.org 
[lkml]   [2019]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v7 02/11] crypto: akcipher - check the presence of callback before the call
Herbert,

On Thu, Mar 21, 2019 at 07:19:18PM +0800, Herbert Xu wrote:
> On Fri, Mar 01, 2019 at 08:59:09PM +0300, Vitaly Chikunov wrote:
> > Because with introduction of EC-RDSA and change in workings of RSA in
> > regard to sign/verify, akcipher could have not all callbacks defined,
> > check the presence of callbacks before calling them to increase
> > robustness.
> >
> > Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
> > ---
> > include/crypto/akcipher.h | 25 ++++++++++++++++---------
> > 1 file changed, 16 insertions(+), 9 deletions(-)
> >
> > diff --git a/include/crypto/akcipher.h b/include/crypto/akcipher.h
> > index 2d690494568c..f537fad1989f 100644
> > --- a/include/crypto/akcipher.h
> > +++ b/include/crypto/akcipher.h
> > @@ -268,7 +268,10 @@ static inline unsigned int crypto_akcipher_maxsize(struct crypto_akcipher *tfm)
> > {
> > struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
> >
> > - return alg->max_size(tfm);
> > + if (alg->max_size)
> > + return alg->max_size(tfm);
> > + else
> > + return 0;
> > }
>
> Please do these checks at registration time instead and provide
> default implementations as needed.

I guess patch "PATCH v7 01/11] KEYS: report to keyctl only actually
supported key ops" should also be removed and will infer anything from
presence of the callbacks.


Thanks,


>
> Thanks,
> --
> 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

\
 
 \ /
  Last update: 2019-03-21 12:42    [W:0.068 / U:1.944 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site