This commit adds two new functions, krb5_server_decrypt_ticket_keyblock

  This commit adds two new functions, krb5_server_decrypt_ticket_keyblock
  (private) and krb5_server_decrypt_ticket_keytab (public).  These
  functions take a krb5_ticket as input and decrypt it using the provided
  key data.  The public function is useful for higher level application
  protocols such a TLS-KRB5 and AFS RX-KRB5 which exchange a service
  but do not use the AP-REQ/AP-REP messages.

  This commit also adds new functionality to kvno which permits kvno
  when provided a keytab as input to verify whether or not the keytab
  contains a key that can successfully decrypt the obtains service ticket.

ticket: 5349
tags: pullup

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@19062 dc483132-0cff-0310-8789-dd5450dbe970