This is currently blocked by https://twistedmatrix.com/trac/ticket/5350 which could be partially fixed by http://twistedmatrix.com/trac/ticket/7413, except Ed25519 which would still need https://github.com/pyca/cryptography/issues/856.
http://twistedmatrix.com/trac/ticket/7693 would also be needed for the pyCA support.
This is currently blocked by https:/ /twistedmatrix. com/trac/ ticket/ 5350 which could be partially fixed by http:// twistedmatrix. com/trac/ ticket/ 7413, except Ed25519 which would still need https:/ /github. com/pyca/ cryptography/ issues/ 856.
http:// twistedmatrix. com/trac/ ticket/ 7693 would also be needed for the pyCA support.