}


    /**
     * 
     * @return whether the SID is blank (all sub-authorities zero)
     */
    public boolean isBlank () {
        boolean blank = true;
        for ( int sub : this.sub_authority )
            blank = blank && ( sub == 0 );
        return blank;
    }


    /**
     * 
     * @return domain SID
     */
    @Override

        attrExpiration = sizeExpiration =
                System.currentTimeMillis() + attrExpirationPeriod;
    }

    private SmbComBlankResponse blank_resp() {
        if( blank_resp == null ) {
            blank_resp = new SmbComBlankResponse();
        }
        return blank_resp;
    }
    void resolveDfs(ServerMessageBlock request) throws SmbException {
        if (request instanceof SmbComClose)
            return;

            System.arraycopy( e8, 0, e, i * 8, 8 );
        }
    }

    static String DEFAULT_DOMAIN;
    static String DEFAULT_USERNAME;
    static String DEFAULT_PASSWORD;
    static final String BLANK = "";

    public static final NtlmPasswordAuthentication ANONYMOUS = new NtlmPasswordAuthentication("", "", "");

    static void initDefaults() {
        if (DEFAULT_DOMAIN != null) return;

                         * blank password initializes signing.
                         */
                        if (transport.isSignatureSetupRequired( auth )) {
                            if( auth.hashesExternal && NtlmPasswordAuthentication.DEFAULT_PASSWORD != NtlmPasswordAuthentication.BLANK ) {
                                /* preauthentication
                                 */

                /*
                 * Create SMB signature digest if necessary
                 * Only the first SMB_COM_SESSION_SETUP_ANX with non-null or
                 * blank password initializes signing.
                 */
                if ( !anonymous && isSignatureSetupRequired() ) {
                    if ( isExternalAuth(getContext(), npa) ) {
                        /*