krb5_decode_princ_entry
retval = krb5_decode_princ_entry(ctx, &contdata, &entry);
retval = krb5_decode_princ_entry(context, &contdata, entry);
retval = krb5_decode_princ_entry(context, &contdata, &entry);
krb5_decode_princ_entry(krb5_context context, krb5_data *content,