protected synchronized SmbFileHandleImpl ensureOpen () throws CIFSException {
        if ( !isOpen() ) {
            // one extra acquire to keep this open till the stream is released
            this.handle = this.file.openUnshared(this.openFlags, this.access, this.sharing, SmbConstants.ATTR_NORMAL, 0).acquire();
            if ( this.append ) {
                this.fp = this.handle.getInitialSize();
                if ( log.isDebugEnabled() ) {

 * <font color="#800000"><i>Important: all SMB URLs that represent
 * workgroups, servers, shares, or directories require a trailing slash '/'.
 * </i></font>
 * <p>
 * When using the <tt>java.net.URL</tt> class with
 * 'smb1://' URLs it is necessary to first call the static
 * <tt>jcifs.smb1.Config.registerSmbURLHandler();</tt> method. This is required
 * to register the SMB protocol handler.
 * <p>

            Assert.assertEquals(t1, t2);
        }

    }


    // this test is meant to test server-side session invalidation behavior
    // and not part of the regular test suite as manual steps are required
    //@Test
    public void testSessionMaintenance () throws IOException, InterruptedException {
        try ( SmbFile f = getDefaultShareRoot() ) {
            checkConnection(f);
            while ( true ) {

        byte[] token = negoResp.getSecurityBlob();
        final int securityMode = ( ( negoResp.getSecurityMode() & Smb2Constants.SMB2_NEGOTIATE_SIGNING_REQUIRED ) != 0 ) || trans.isSigningEnforced()
                ? Smb2Constants.SMB2_NEGOTIATE_SIGNING_REQUIRED : Smb2Constants.SMB2_NEGOTIATE_SIGNING_ENABLED;
        boolean anonymous = this.credentials.isAnonymous();
        long sessId = 0;

 * <font color="#800000"><i>Important: all SMB URLs that represent
 * workgroups, servers, shares, or directories require a trailing slash '/'.
 * </i></font>
 * <p>
 * When using the <tt>java.net.URL</tt> class with
 * 'smb://' URLs it is necessary to first call the static
 * <tt>jcifs.Config.registerSmbURLHandler();</tt> method. This is required
 * to register the SMB protocol handler.
 * <p>

        return this.transportContext;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.util.transport.Transport#acquire()
     */
    @Override
    public SmbTransportImpl acquire () {
        return (SmbTransportImpl) super.acquire();
    }


    /**
     * @return the server's encryption key
     */
    @Override
    public byte[] getServerEncryptionKey () {

            SmbTreeImpl tree = (SmbTreeImpl) obj;
            return matches(tree.share, tree.service);
        }
        return false;
    }


    public SmbTreeImpl acquire () {
        return acquire(true);
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.SmbTree#unwrap(java.lang.Class)
     */
    @SuppressWarnings ( "unchecked" )
    @Override