byte[] dk = deriveKeyAES(baseKey, cst); // Checksum key
        try {
            Mac m = Mac.getInstance("HmacSHA1");
            m.init(new SecretKeySpec(dk, HMAC_KEY));
            System.arraycopy(m.doFinal(input), 0, output, 0, 12);
            return output;
        } finally {
            Arrays.fill(dk, 0, dk.length, (byte) 0);
        }
    }

    /**

Fess also contains a Crawler, which can crawl documents on a [web server](https://fess.codelibs.org/15.3/admin/webconfig-guide.html), [file system](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html), or [Data Store](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html) (such as a CSV or database)....

                byte[] addr = new byte[4];
                System.arraycopy(data, offset + 4, addr, 0, 4);
                return InetAddress.getByAddress(addr);
            } else if (family == 23) { // AF_INET6
                byte[] addr = new byte[16];
                System.arraycopy(data, offset + 8, addr, 0, 16);
                return InetAddress.getByAddress(addr);
            }
        } catch (Exception e) {

        String ver, pkgs;

        ver = System.getProperty("java.version");
        if (ver.startsWith("1.1.") || ver.startsWith("1.2.")) {
            throw new RuntimeException("jcifs.smb1-0.7.0b4+ requires Java 1.3 or above. You are running " + ver);
        }
        pkgs = System.getProperty("java.protocol.handler.pkgs");
        if (pkgs == null) {
            System.setProperty("java.protocol.handler.pkgs", "jcifs.smb1");

        final int start = dstIndex;

        if (this.blob != null) {
            System.arraycopy(this.blob, 0, dst, dstIndex, this.blob.length);
            dstIndex += this.blob.length;
        } else {
            System.arraycopy(this.lmHash, 0, dst, dstIndex, this.lmHash.length);
            dstIndex += this.lmHash.length;
            System.arraycopy(this.ntHash, 0, dst, dstIndex, this.ntHash.length);

        }

        try {
            statistics.recordReadRequest(length);
            long startTime = System.nanoTime();

            int bytesRead = rdmaConnection.read(buffer, remoteAddress, remoteKey, length);

            long duration = System.nanoTime() - startTime;
            statistics.recordReadSuccess(bytesRead, duration);

            return bytesRead;

        final int start = dstIndex;

        if (blob != null) {
            System.arraycopy(blob, 0, dst, dstIndex, blob.length);
            dstIndex += blob.length;
        } else {
            System.arraycopy(lmHash, 0, dst, dstIndex, lmHash.length);
            dstIndex += lmHash.length;
            System.arraycopy(ntHash, 0, dst, dstIndex, ntHash.length);
            dstIndex += ntHash.length;

            System.arraycopy(password, 0, dst, dstIndex, passwordLength);
            dstIndex += passwordLength;
        } else {
            // no password in tree connect
            dst[dstIndex++] = (byte) 0x00;
        }
        dstIndex += writeString(path, dst, dstIndex);
        try {
            System.arraycopy(service.getBytes("ASCII"), 0, dst, dstIndex, service.length());

        final int length = readUShort(src, index);
        final int offset = readULong(src, index + 4);
        final byte[] buffer = new byte[length];
        System.arraycopy(src, offset, buffer, 0, length);
        return buffer;
    }

    static void writeULong(final byte[] dest, final int offset, final int ulong) {
        dest[offset] = (byte) (ulong & 0xff);

    public static final int WITNESS_RESOURCE_STATE_UNAVAILABLE = 0x000000FF;

    /**
     * Creates a new empty witness notification.
     */
    public WitnessNotification() {
        this.timestamp = System.currentTimeMillis();
        this.newIPAddresses = new ArrayList<>();
        this.oldIPAddresses = new ArrayList<>();
        this.flags = WITNESS_RESOURCE_STATE_UNKNOWN;
    }

    /**