linux-kernel - Re: [PATCH v2 18/18] keyctl_pkey: Add pkey parameters slen and mgfhash for PSS

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Message-ID: <3cb6b04c-3a17-44e0-2609-30ccbfc4d1dd@suse.com>
Date:   Tue, 20 Apr 2021 13:46:44 +0200
From:   Varad Gautam <varad.gautam@...e.com>
To:     Ben Boeckel <me@...boeckel.net>
CC:     linux-crypto@...r.kernel.org, dhowells@...hat.com,
        herbert@...dor.apana.org.au, davem@...emloft.net, vt@...linux.org,
        tianjia.zhang@...ux.alibaba.com, keyrings@...r.kernel.org,
        linux-kernel@...r.kernel.org, jarkko@...nel.org,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        "open list:SECURITY SUBSYSTEM" 
        <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH v2 18/18] keyctl_pkey: Add pkey parameters slen and
 mgfhash for PSS

On 4/9/21 4:15 PM, Ben Boeckel wrote:
> On Thu, Apr 08, 2021 at 16:15:16 +0200, Varad Gautam wrote:
>> keyctl pkey_* operations accept enc and hash parameters at present.
>> RSASSA-PSS signatures also require passing in the signature salt
>> length and the mgf hash function.
>>
>> Add parameters:
>> - 'slen' to feed in salt length of a PSS signature.
>> - 'mgfhash' to feed in the hash function used for MGF.
> 
> Could `Documentation/security/keys/core.rst` be updated to mention these
> new parameters? Statements on what values are allowed would be
> appreciated as well (e.g., that `saltlen` (a far better name IMO) is
> unsigned 32-bits and where valid algorithm names could be found as
> well).
> 

Thanks, I've added these to v3.

> Thanks,
> 
> --Ben
> 

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