try {
            descr = DESCR[which].getBytes("ASCII");
        } catch (final UnsupportedEncodingException uee) {
            return 0;
        }

        SMBUtil.writeInt2(getSubCommand() & 0xFF, dst, dstIndex);
        dstIndex += 2;
        System.arraycopy(descr, 0, dst, dstIndex, descr.length);
        dstIndex += descr.length;
        SMBUtil.writeInt2(0x0001, dst, dstIndex);
        dstIndex += 2;

        writeInt2(fid, dst, dstIndex);
        dstIndex += 2;
        writeInt4(offset, dst, dstIndex);
        dstIndex += 4;
        for (int i = 0; i < 4; i++) {
            dst[dstIndex++] = (byte) 0xFF;
        }
        writeInt2(writeMode, dst, dstIndex);
        dstIndex += 2;
        writeInt2(remaining, dst, dstIndex);
        dstIndex += 2;
        dst[dstIndex] = (byte) 0x00;
        dstIndex++;

     */
    private static byte[] newBuffer(int length) {
        // initialise with distinct pattern to detect unused trailing bytes
        byte[] buf = new byte[length];
        Arrays.fill(buf, (byte) 0xFF);
        return buf;
    }

    @Test
    @DisplayName("constructor initialises command and parameters correctly")
    void testConstructorInitialisesFields() throws Exception {
        int level = 42;

        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**
     * Creates a NetBIOS keep-alive header.
     * Keep-alive packets have type 0x85 and zero length.
     */
    private static byte[] keepAliveHeader() {

    void testWriteULongNegative() {
        byte[] dest = new byte[4];
        NtlmMessage.writeULong(dest, 0, -1);
        assertArrayEquals(new byte[] { -1, -1, -1, -1 }, dest, "All bytes should be 0xFF for -1");
    }

    @Test
    @DisplayName("writeUShort writes little endian bytes")
    void testWriteUShort() {
        byte[] dest = new byte[2];
        NtlmMessage.writeUShort(dest, 0, 0xBBAA);

    void testWriteParameterWordsWireFormatBoundaryConditions() {
        byte[] dst = new byte[256];

        // Test with maximum values
        transaction.setMaxSetupCount((byte) 0xFF);
        transaction.setTotalParameterCount(0xFFFFFFFF);
        transaction.setTotalDataCount(0xFFFFFFFF);
        transaction.setMaxParameterCount(0xFFFFFFFF);
        transaction.setMaxDataCountForTest(0xFFFFFFFF);

  int charCount;

  @Param({"MURMUR3_32", "MURMUR3_128", "SHA1"})
  HashFunctionEnum hashFunctionEnum;

  private String[] strings;

  static final int SAMPLES = 0x100;
  static final int SAMPLE_MASK = 0xFF;

  /**
   * Compute arrays of valid unicode text, and store it in 3 forms: byte arrays, Strings, and
   * StringBuilders (in a CharSequence[] to make it a little harder for the JVM).
   */
  @BeforeExperiment

        bufferIndex += 4;
        this.eaSize = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        final int shortNameLength = buffer[bufferIndex] & 0xFF;
        bufferIndex += 2;

        this.shortName = Strings.fromUNIBytes(buffer, bufferIndex, shortNameLength);
        bufferIndex += 24;

        String str;
        if (this.unicode) {

        while (ai-- > 0) {
            arr[ai] = HEXCHARS[value & 0xF];
            value >>>= 4;
        }
        return new String(arr);
    }

    private static byte B(final int i) {
        return (byte) (i & 0xFF);
    }

    private static short S(final int i) {
        return (short) (i & 0xFFFF);
    }

    /**
     * Constructs a UUID from an existing rpc.uuid_t object
     *
     * @param uuid

        return this.sid;
    }

    @Override
    public int decode(final byte[] buf, int bi, final int len) {
        this.allow = buf[bi] == (byte) 0x00;
        bi++;
        this.flags = buf[bi++] & 0xFF;
        final int size = SMBUtil.readInt2(buf, bi);
        bi += 2;
        this.access = SMBUtil.readInt4(buf, bi);
        bi += 4;
        this.sid = new SID(buf, bi);
        return size;
    }