private final CIFSContext transportContext;
    private final boolean signingEnforced;

    private SmbNegotiationResponse negotiated;

    private SMBSigningDigest digest;

    private final Semaphore credits = new Semaphore(1, true);

    private final int desiredCredits = 512;

    private byte[] preauthIntegrityHash = new byte[64];
    private final Object preauthHashLock = new Object();