[gnutls-devel] GnuTLS | Add support for loading Ed25519 keys from PKCS#11 and using them (!1200)

[Development of GNU's TLS library]

Dmitry Baryshkov commented on a discussion on lib/pkcs11_write.c: https://gitlab.com/gnutls/gnutls/-/merge_requests/1200#note_302292176

>  		break;
>  	}
>  	case GNUTLS_PK_EDDSA_ED25519: {
> -		gnutls_datum_t params;
> +		gnutls_datum_t params, ecpoint;
>  
> +		/* XXX This is wrong -- we need encode the curve name
> +		 * not OID according to the last PKCS #11 3.0 draft */

According to [PKCS#11 spec](https://docs.oasis-open.org/pkcs11/pkcs11-curr/v3.0/cs01/pkcs11-curr-v3.0-cs01.html#_Toc30061182):

> Edwards EC public keys only support the use of the curveName selection to specify a curve name as defined in [RFC 8032] and the use of the oID selection to specify a curve through an EdDSA algorithm as defined in [RFC 8410]. Note that keys defined by RFC 8032 and RFC 8410 are incompatible.

So ideally we should support buth curveName and OID.

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