}
        else {
            javaChecksum = sun.security.krb5.internal.crypto.Aes256.calculateChecksum(keybytes, usage, bytes, 0, bytes.length);
        }

        byte[] mac = PacMac.calculateMacHMACAES(usage, makeKey(keybytes, keybytes.length == 16 ? 17 : 18), bytes);
        checkBytes(javaChecksum, mac);
        checkBytes(Hex.decode(expect), mac);
    }

    /**
     * Writes the specified byte to this file output stream.
     *
     * @throws IOException
     *             if a network error occurs
     */

    @Override
    public void write ( int b ) throws IOException {
        this.tmp[ 0 ] = (byte) b;
        write(this.tmp, 0, 1);
    }


    /**
     * Writes b.length bytes from the specified byte array to this
     * file output stream.

    }


    /**
     * Reads up to b.length bytes of data from this input stream into an array of bytes.
     *
     * @throws IOException
     *             if a network error occurs
     */

    @Override
    public int read ( byte[] b ) throws IOException {
        return read(b, 0, b.length);
    }


    /**
     * Reads up to len bytes of data from this input stream into an array of bytes.
     *

    private byte[] challenge;
    private String target;
    private byte[] context;
    private byte[] targetInformation;

    private static final Map<String, byte[]> TARGET_INFO_CACHE = new HashMap<>();


    private static byte[] getDefaultTargetInfo ( CIFSContext tc ) {
        String domain = tc.getConfig().getDefaultDomain();
        byte[] ti = TARGET_INFO_CACHE.get(domain);

    /**
     * Read bytes from the input stream into a buffer
     * 
     * @param in
     * @param b
     * @param off
     * @param len
     * @return number of bytes read
     * @throws IOException
     */
    public static int readn ( InputStream in, byte[] b, int off, int len ) throws IOException {
        int i = 0, n = -5;

    // KGS!@#$%
    private static final byte[] S8 = {
        (byte)0x4b, (byte)0x47, (byte)0x53, (byte)0x21,
        (byte)0x40, (byte)0x23, (byte)0x24, (byte)0x25
    };
    /* Accepts key multiple of 7
     * Returns enc multiple of 8
     * Multiple is the same like: 21 byte key gives 24 byte result
     */
    private static void E( byte[] key, byte[] data, byte[] e ) {
        byte[] key7 = new byte[7];

                byte[] userSessionKey = hmac.digest();

                if ((getFlags() & NTLMSSP_NEGOTIATE_KEY_EXCH) != 0) {
                    masterKey = new byte[16];
                    RANDOM.nextBytes(masterKey);

                    byte[] exchangedKey = new byte[16];
                    RC4 rc4 = new RC4(userSessionKey);
                    rc4.update(masterKey, 0, 16, exchangedKey, 0);

                // + 8 byte query response overhead
                // + 110 bytes entry
                // -> 1022 predicted message size <= 1023 maximum buffer size
                // 112 bytes to alignment
                // -> aligned to 1024 > 1023 maximum buffer size

                // 110 byte entry = 16 byte name = 8 char length
                try ( SmbResource r = f.resolve(repeat('Y', 8)) ) {
                    r.createNewFile();

            andxCommand = (byte)0xFF;
            andx = null;

            dst[start + ANDX_COMMAND_OFFSET] = (byte)0xFF;
            dst[start + ANDX_RESERVED_OFFSET] = (byte)0x00;
//            dst[start + ANDX_OFFSET_OFFSET] = (byte)0x00;
//            dst[start + ANDX_OFFSET_OFFSET + 1] = (byte)0x00;
            dst[start + ANDX_OFFSET_OFFSET] = (byte)0xde;

                    i = i == 1 ? 0 : 1;
                    off += read;
                }

                if ( log.isDebugEnabled() ) {
                    log.debug(String.format("Copied a total of %d bytes", off));
                }

                if ( dh.isSMB2() ) {
                    Smb2SetInfoRequest req = new Smb2SetInfoRequest(dh.getConfig(), dfd.getFileId());