certdb_ref() = reference()
db_handle() = term()
der_cert() = binary()
oid() = tuple()
public_key_params() = #'Dss-Parms'{}
| {namedCurve, oid()}
| #'ECParameters'{}
| term()
ssl_handshake() = #server_hello{}
| #server_hello_done{}
| #certificate{}
| #certificate_request{}
| #client_key_exchange{}
| #finished{}
| #certificate_verify{}
| #hello_request{}
| #next_protocol{}
ssl_handshake_history() = {[binary()], [binary()]}