linux-kernel - Re: [PATCH v9 1/9] crypto: Add support for shake256 through crypto

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Message-ID: <20251117165047.GA1584@sol>
Date: Mon, 17 Nov 2025 08:50:47 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: David Howells <dhowells@...hat.com>
Cc: 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>,
	Lukas Wunner <lukas@...ner.de>,
	Ignat Korchagin <ignat@...udflare.com>,
	linux-crypto@...r.kernel.org, keyrings@...r.kernel.org,
	linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 1/9] crypto: Add support for shake256 through
 crypto_shash

On Mon, Nov 17, 2025 at 02:55:50PM +0000, David Howells wrote:
> Add shake256 support to the SHA-3 crypto_sig module so that ML-DSA can use
> it.

Why?  Not only does this patch not expose SHAKE256 support correctly,
the ML-DSA code just accesses SHAKE256 via the library API, not
crypto_shash.  So this seems unnecessary.

- Eric