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### The lib Directory

The lib directory contain 10 subdirectories as well as some definition and glue files. The crypto subdirectory contains the Kerberos V5 encryption library. The des425 subdirectory exports the Kerberos V4 encryption API, and translates these functions into calls to the Kerberos V5 encryption API. The gssapi library contains the Generic Security Services API, which is a library of commands to be used in secure client-server communication. The kadm5 directory contains the libraries for the KADM5 administration utilities. The Kerberos 5 database libraries are contained in kdb. The directories krb4 and krb5 contain the Kerberos 4 and Kerberos 5 APIs, respectively. The rpc directory contains the API for the Kerberos Remote Procedure Call protocol.