if (saslClnt == null) {
throw new AuthenticationNotSupportedException(authMech);
}
LdapResult res;
String mechName = saslClnt.getMechanismName();
byte[] response = saslClnt.hasInitialResponse() ?
saslClnt.evaluateChallenge(NO_BYTES) : null;
res = clnt.ldapBind(null, response, bindCtls, mechName, true);