This interface provides utility functions for applications'
 convenience.  It provides functions that may be used for example by
 command line applications but also other applications may find some
 routines helpful.  None of these routines are mandatory in any other
 SILC routines or libraries, and are purely provided for convenience.
 These routines for example provide simple public key and private key
 pair generation, public key and private key file saving and loading
 for application, and other similar routines.