optional: Add support for ed448
ed448 is a signing algorithm being standardized by CFRG which operates similarly to ed25519 but has a higher security level. This algorithm is part of TLS 1.3.
This is a nice to have feature, rather than requirement.
https://tools.ietf.org/html/draft-irtf-cfrg-eddsa-08
Parts:
-
Add in nettle -
Add as a general signature algorithm in gnutls (X.509/PKCS#7) -
Add in TLS -
Test suite for nettle -
Test suite for X.509/PKCS#7 verification / generation -
Test suite for TLS use