To create an importable key with openssl: openssl ecparam -name prime256v1 -genkey -noout -out private-key.pem openssl pkcs8 -topk8 -nocrypt -in private-key.p

To create an importable key with openssl: openssl ecparam -name prime256v1 -genkey -noout -out private-key.pem openssl pkcs8 -topk8 -nocrypt -in private-key.pem -out concords-key.pem