linux-kernel - Re: [PATCH v2 06/14] crypto: ecc - Add NIST P521 curve parameters

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Date: Fri, 16 Feb 2024 14:03:24 -0500
From: Stefan Berger <stefanb@...ux.ibm.com>
To: "Elliott, Robert (Servers)" <elliott@....com>,
        "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "davem@...emloft.net" <davem@...emloft.net>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "saulo.alessandre@....jus.br" <saulo.alessandre@....jus.br>
Subject: Re: [PATCH v2 06/14] crypto: ecc - Add NIST P521 curve parameters



On 2/16/24 13:48, Elliott, Robert (Servers) wrote:
>> -----Original Message-----
>> From: Stefan Berger <stefanb@...ux.ibm.com>
>> Sent: Thursday, February 15, 2024 5:14 PM
>> Subject: [PATCH v2 06/14] crypto: ecc - Add NIST P521 curve parameters
>>
>> Add the parameters for the NIST P521 curve and define a new curve ID
>> for it. Make the curve available in ecc_get_curve.
>>
> ...
>> diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h
> ...
>> +static struct ecc_curve nist_p521 = {
>> +	.name = "nist_521",
> 
> Are the name fields in the ecc_curve structures used anywhere or
> exposed to userspace?
> 
> It'd be nice if the strings for the nist_p192, nist_p256, and nist_p384
> structures and this new nist_p521 structure included "p" before
> the number, better matching all the code and the NIST FIPS 186-4 names:
>      .name = "nist_p192"
>      .name = "nist_p256"
>      .name = "nist_p384"
>      .name = "nist_p521"
> 
> 

This is what is exposed:

$ cat /proc/crypto | grep nist
name         : ecdh-nist-p384
driver       : ecdh-nist-p384-generic
name         : ecdh-nist-p256
driver       : ecdh-nist-p256-generic
name         : ecdh-nist-p192
driver       : ecdh-nist-p192-generic
name         : ecdsa-nist-p384
driver       : ecdsa-nist-p384-generic
name         : ecdsa-nist-p256
driver       : ecdsa-nist-p256-generic
name         : ecdsa-nist-p192
driver       : ecdsa-nist-p192-generic