Re: Issues integrating with ML-DSA

On Wed, 16 Jul 2025 at 08:52, Santiago de Vicente Poutás <
[email protected]> wrote:

> Hi all,
>
> I am trying to modify libp11 to support a HSM that has PQC capabilities.
> For that right now I am trying to create a EVP_PKEY with the new keytype
> EVP_PKEY_ML_DSA_44. The problem I'm encountering right now is that I'm
> trying to call EVP_PKEY_assign() with a key_type of EVP_PKEY_ML_DSA_44 but
> it returns a 0.
>
> I also don't know what to put on the *key part to be honest.
>

Calling `EVP_PKEY_assign` for ML-DSA really doesn't make any sense.
`EVP_PKEY_assign` is deprecated, and only really useful if you are
assigning a legacy "low level" key to the EVP_PKEY. Newer provider based
keys don't work this way so you should not call EVP_PKEY_assign() for them.

Are you trying to generate a new key? Or load/import some existing key?

Matt


>
> Best Regards,
>
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