See 
PublishedAPI for packages intended to be used by Plugin and Contrib authors, or 
browse all packages.
See also 
Developing plugins, 
Developer's Bible, 
Technical Overview
Wizard methods to handle SMIME certificates.
  WIZARD generate_cert 
Generate a self-signed certficate for the 
WebMaster.
This allows immediate use of signed email.
  WIZARD request_cert 
Generate a certificate signing request for the 
WebMaster. This request
must be signed by a Certificate Authority to create a certificate,
then installed.
  WIZARD cancel_cert 
Cancel a pending Certificate Signing request. This destroys the
private key associated with the request.
  WIZARD show_request 
Show the pending SSL Certificate signing request.