linux-kernel - Re: [PATCH v7 02/11] crypto: akcipher - check the presence of callback before the call

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Message-ID: <20190321121124.lg4fjitsew5kpvq6@gondor.apana.org.au>
Date:   Thu, 21 Mar 2019 20:11:24 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     David Howells <dhowells@...hat.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        linux-integrity@...r.kernel.org, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 02/11] crypto: akcipher - check the presence of
 callback before the call

On Thu, Mar 21, 2019 at 02:42:10PM +0300, Vitaly Chikunov wrote:
>
> 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.

Indeed.  Especially if this is exposed to user-space then you
need to be careful changing the user-space API by clearing the
verify/sign bits for raw RSA.

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