verify_princ
krb5_principal verify_princ = NULL;
code = krb5_parse_name(context, value, &verify_princ);
vparams.princ = verify_princ;
krb5_free_principal(context, verify_princ);
verify_princ(c->client);
verify_princ(c->client);
verify_princ(princ);
verify_princ(princ);