linux-kernel - Re: [PATCH RFC 2/2] crypto: RSA: KEYS: convert rsa and public key to new PKE API

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Date:	Fri, 01 May 2015 12:27:58 -0700
From:	Tadeusz Struk <tadeusz.struk@...el.com>
To:	David Howells <dhowells@...hat.com>
CC:	herbert@...dor.apana.org.au, corbet@....net, keescook@...omium.org,
	qat-linux@...el.com, jwboyer@...hat.com, richard@....at,
	d.kasatkin@...sung.com, linux-kernel@...r.kernel.org,
	steved@...hat.com, vgoyal@...hat.com, james.l.morris@...cle.com,
	jkosina@...e.cz, zohar@...ux.vnet.ibm.com, davem@...emloft.net,
	jdelvare@...e.de, linux-crypto@...r.kernel.org
Subject: Re: [PATCH RFC 2/2] crypto: RSA: KEYS: convert rsa and public key
 to new PKE API

On 05/01/2015 09:21 AM, David Howells wrote:
>> +			.verify = RSA_verify_signature,
>> > +			.capabilities = PKEY_CAN_VERIFY,
> Can we keep .verify_signature as the name of the first.  The second is
> redundant given the function pointers.

I'm thinking that .verify will be more generic. If in the future
we would like to implement something that verifies not a signature, but
for instance is a number is a prime, then we can register a "prime" alg
that implements verify and returns true if a number is a prime.   

> 
> Given that X.509 certs can hang around for a very long time, having a tfm in
> the cert is probably a bad idea as it may pin resources such as crypto h/w.
> 
>> > -	ctx->cert->pub->pkey_algo = PKEY_ALGO_RSA;
>> > -
> I think you need this rather than the above.  You should only get the tfm when
> you actually need it.
> 

That's a good point.
Thank you David for all your comments. I'll rework my patches and send v2 soon.
I'll also try to integrate it with your sign-file as you suggested.
Thanks
T
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