I notice that knot 3.1 does not support EdDSA (22519 and 448) when using
softhsm as a PKCS #11 backend. Since this is supported by knot when using
the default cryptographic provider, and also by gnutls 3.6.0 (at least for
the 25519 version) for release 3.6.0 and later, my guess is that this a
limitation in softhsm itself. Could anybody in this forum with the
necessary savvy please confirm (or not) this?