linux-kernel - Re: [PATCH RFC v5 2/4] crypto: add PKE API

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Message-ID: <20150616000519.GA16973@gondor.apana.org.au>
Date:	Tue, 16 Jun 2015 08:05:19 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	linux-kernel@...r.kernel.org, keescook@...omium.org,
	jwboyer@...hat.com, smueller@...onox.de, richard@....at,
	steved@...hat.com, qat-linux@...el.com, dhowells@...hat.com,
	linux-crypto@...r.kernel.org, james.l.morris@...cle.com,
	jkosina@...e.cz, zohar@...ux.vnet.ibm.com, davem@...emloft.net,
	vgoyal@...hat.com
Subject: Re: [PATCH RFC v5 2/4] crypto: add PKE API

On Mon, Jun 15, 2015 at 01:18:42PM -0700, Tadeusz Struk wrote:
>
> + * @setkey:	Function invokes the algorithm specific set key function, which
> + *		knows how to decode and interpret the BER encoded key

We should split this into two functions: setpubkey and setprivkey.

> + *
> + * @reqsize:	Request context size required by algorithm implementation
> + * @base:	Common crypto API algorithm data structure
> + */
> +struct akcipher_alg {
> +	int (*sign)(struct akcipher_request *req);
> +	int (*verify)(struct akcipher_request *req);
> +	int (*encrypt)(struct akcipher_request *req);
> +	int (*decrypt)(struct akcipher_request *req);
> +	int (*maxsize)(struct crypto_akcipher *tfm);

Hmm, we could actually get rid of maxsize by just having each
function check the dst_len and if it is insufficient write the
required length in it and then return an error.

Thanks,
-- 
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
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