linux-kernel - Re: Module signing and post-quantum crypto public key algorithms

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Message-ID: <502669.1749829369@warthog.procyon.org.uk>
Date: Fri, 13 Jun 2025 16:42:49 +0100
From: David Howells <dhowells@...hat.com>
To: Ignat Korchagin <ignat@...udflare.com>
Cc: dhowells@...hat.com, Herbert Xu <herbert@...dor.apana.org.au>,
    Stephan Mueller <smueller@...onox.de>, Simo Sorce <simo@...hat.com>,
    torvalds@...ux-foundation.org, Paul Moore <paul@...l-moore.com>,
    Lukas Wunner <lukas@...ner.de>, Clemens Lang <cllang@...hat.com>,
    David Bohannon <dbohanno@...hat.com>,
    Roberto Sassu <roberto.sassu@...wei.com>, keyrings@...r.kernel.org,
    linux-crypto@...r.kernel.org, linux-security-module@...r.kernel.org,
    linux-kernel@...r.kernel.org
Subject: Re: Module signing and post-quantum crypto public key algorithms

Ignat Korchagin <ignat@...udflare.com> wrote:

> > The not so good news, as I understand it, though, is that the X.509 bits are
> > not yet standardised.
> 
> Does it matter from a kernel perspective? As far as I remember we just
> attach the "plain" signature to binary. Or is it about provisioning
> the key through the keystore?

PKCS#7 is used for the signatures and X.509 is used to provide the public
keys.

David