linux-kernel - Re: [PATCH v11 3/8] pkcs7, x509: Add ML-DSA support

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Message-ID: <1837726.1767692252@warthog.procyon.org.uk>
Date: Tue, 06 Jan 2026 09:37:32 +0000
From: David Howells <dhowells@...hat.com>
To: Eric Biggers <ebiggers@...nel.org>
Cc: dhowells@...hat.com, Lukas Wunner <lukas@...ner.de>,
    Ignat Korchagin <ignat@...udflare.com>,
    Jarkko Sakkinen <jarkko@...nel.org>,
    Herbert Xu <herbert@...dor.apana.org.au>,
    Luis Chamberlain <mcgrof@...nel.org>,
    Petr Pavlu <petr.pavlu@...e.com>, Daniel Gomez <da.gomez@...nel.org>,
    Sami Tolvanen <samitolvanen@...gle.com>,
    "Jason A . Donenfeld" <Jason@...c4.com>,
    Ard Biesheuvel <ardb@...nel.org>,
    Stephan Mueller <smueller@...onox.de>, linux-crypto@...r.kernel.org,
    keyrings@...r.kernel.org, linux-modules@...r.kernel.org,
    linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 3/8] pkcs7, x509: Add ML-DSA support

Eric Biggers <ebiggers@...nel.org> wrote:

> This "PKCS#7" (really CMS -- the kernel misleadingly uses the old name)

I implemented PKCS#7 first and then added CMS on top of that.

> That needs to either be implemented correctly, or not at all.  (If only
> (2) is actually needed, then "not at all" probably would be preferable.)

At the time of writing, openssl didn't fully support CMS with ML-DSA, and that
limited things.

David