linux-kernel - Re: [PATCH 1/5 v2] PM / hibernate: Create snapshot keys handler

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Message-ID: <20190108050358.llsox32hggn2jioe@gondor.apana.org.au>
Date:   Tue, 8 Jan 2019 13:03:58 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Stephan Mueller <smueller@...onox.de>
Cc:     "Lee, Chun-Yi" <joeyli.kernel@...il.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, keyrings@...r.kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Chen Yu <yu.c.chen@...el.com>,
        Oliver Neukum <oneukum@...e.com>,
        Ryan Chen <yu.chen.surf@...il.com>,
        David Howells <dhowells@...hat.com>,
        Giovanni Gherdovich <ggherdovich@...e.cz>,
        Randy Dunlap <rdunlap@...radead.org>,
        Jann Horn <jannh@...gle.com>, Andy Lutomirski <luto@...nel.org>
Subject: Re: [PATCH 1/5 v2] PM / hibernate: Create snapshot keys handler

On Mon, Jan 07, 2019 at 04:52:00PM +0100, Stephan Mueller wrote:
>
> Would it make sense to polish these mentioned KDF patches and add them to the 
> kernel crypto API? The sprawl of key derivation logic here and there which 
> seemingly does not comply to any standard and thus possibly have issues should 
> be prevented and cleaned up.

Are we going to have multiple implementations for the same KDF?
If not then the crypto API is not a good fit.  To consolidate
multiple implementations of the same KDF, simply provide helpers
for them.

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