/**
     * Gets the principal associated with this handle
     * @return the principal or null if not authenticated
     */
    public Principal getPrincipal() {
        if (this instanceof DcerpcPipeHandle) {
            return ((DcerpcPipeHandle) this).pipe.getPrincipal();
        }
        return null;
    }

    @Override
    public String toString() {
        return binding.toString();
    }

            throws AuthenticationException {
        return false;
    }

    @Override
    public Principal getPrincipal() {
        return null;
    }

    @Override
    public String generateAuthResponse(final HttpHost host, final HttpRequest request, final HttpContext context)
            throws AuthenticationException {

            final SID[] sids = new SID[rpc.sids.num_sids];

            final String origin_server = handle.getServer();
            final NtlmPasswordAuthentication origin_auth = (NtlmPasswordAuthentication) handle.getPrincipal();

            for (int i = 0; i < sids.length; i++) {
                sids[i] = new SID(rpc.sids.sids[i].sid, 0, null, null, false);
                sids[i].origin_server = origin_server;

     *
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "Kerb5Authenticator[subject=" + (this.getSubject() != null ? this.getSubject().getPrincipals() : null) + ",user=" + this.user
                + ",realm=" + this.realm + "]";
    }

    private SpnegoContext createContext(CIFSContext tc, String targetDomain, String host) throws GSSException {

        void getUserDomain_fromSubjectPrincipal() {
            Subject subject = new Subject();
            Principal kp = new KerberosPrincipal("******@****.***");
            subject.getPrincipals().add(kp);

            Kerb5Authenticator auth = new Kerb5Authenticator(subject);
            assertEquals("EXAMPLE.COM", auth.getUserDomain());
        }

        @Test

                .lookupPrincipalByName(getUsername());
        ImmutableList<AclEntry> acl =
            ImmutableList.of(
                AclEntry.newBuilder()
                    .setType(ALLOW)
                    .setPrincipal(user)
                    .setPermissions(EnumSet.allOf(AclEntryPermission.class))
                    .setFlags(DIRECTORY_INHERIT, FILE_INHERIT)
                    .build());