krb5_encode_princ_dbkey
retval = krb5_encode_princ_dbkey(context, &keydata, searchfor);
retval = krb5_encode_princ_dbkey(context, &keydata, entry->princ);
if ((retval = krb5_encode_princ_dbkey(context, &keydata, searchfor)))
krb5_encode_princ_dbkey(krb5_context context, krb5_data *key,