Re: [PATCH v7 2/8] crypto: Add ML-DSA/Dilithium verify support

[Eric Biggers]

On Thu, Nov 06, 2025 at 05:44:46PM +0000, David Howells wrote:
> The interface to this code is through the crypto_sig API as the PKCS#7 code
> wants to use that rather than calling it directly.  As such, I've placed it
> in crypto/ rather than lib/crypto/.  Only the verification hooks are
> implemented; the signing hooks return an error.

As I mentioned before
(https://lore.kernel.org/linux-crypto/20250613170456.GA1284@sol/), this
code should go in lib/crypto/.  There seems to be a clean API in
crypto/ml_dsa/dilithium.h already.  Just make that the library API.

If "crypto_sig" support is really needed too, then put that in
crypto/ml-dsa.c, built on top of the library API.  It's not clear the
crypto_sig support is very useful, though.  For one, you had to add
ML-DSA specific logic to the calling code anyway (see "pkcs7: Allow the
signing algo to calculate the digest itself").

- Eric