Is it possible for a new NID and object to be added to support creating and checking the Let's Encrypt ACME TLS-ALPN-01 challenge in which a temporary X509 certificate is created with a specific X509v3 extension containing shared information. Currently, I get a new NID with: OBJ_create('1.3.6.1.5.5.7.1.31','acmeIdentifier','X509v3 ACME Identifier') Angus