return false;
            domain = domain.toLowerCase(Locale.ROOT);
            return domains.get(domain) != null;
        }
    }


    private DfsReferralData getDcReferrals ( CIFSContext tf, String domain ) throws SmbAuthException {
        if ( tf.getConfig().isDfsDisabled() )
            return null;
        String dom = domain.toLowerCase(Locale.ROOT);
        synchronized ( this.dcLock ) {

import java.nio.file.Path;
import java.security.GeneralSecurityException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Locale;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.kerberos.KerberosPrincipal;
import javax.security.auth.kerberos.KeyTab;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

import org.junit.Assert;
import org.junit.Assume;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;

        }

        if ( targetHost != null ) {
            targetHost = targetHost.toLowerCase(Locale.ROOT);
        }

        if ( targetDomain != null ) {
            targetDomain = targetDomain.toUpperCase(Locale.ROOT);
        }

        ListIterator<SmbSessionImpl> iter = this.sessions.listIterator();
        while ( iter.hasNext() ) {