The configuration interface contains mostly FLI function definitions that map directly to OpenSSL calls. See below for a list of those provided.
There are also some functions to make common cases simpler. These are
read-dhparams,
pem-read,
set-ssl-ctx-options,
set-ssl-ctx-password-callback, and
set-ssl-ctx-dh.
LispWorks User Guide and Reference Manual - 21 Dec 2011