// Given - Create a complete SMB2 message with header
        byte[] buffer = new byte[512];
        int headerStart = 0;
        int bodyStart = Smb2Constants.SMB2_HEADER_LENGTH;

        // Write SMB2 header (64 bytes)
        // Protocol ID
        System.arraycopy(new byte[] { (byte) 0xFE, 'S', 'M', 'B' }, 0, buffer, headerStart, 4);
        // Structure size (64)

/**
 * SMB1 COM_LOCKING_ANDX command implementation.
 *
 * This command locks or unlocks byte ranges within a file. It can also
 * be used to break oplocks and change oplock levels.
 *
 * @author mbechler
 */
public class SmbComLockingAndX extends AndXServerMessageBlock {

    private int fid;
    private byte typeOfLock;
    private byte newOpLockLevel;
    private long timeout;
    private LockingAndXRange[] locks;

     */
    public HandleGuid(UUID uuid) {
        this.guid = uuid;
    }

    /**
     * Convert the GUID to byte array for wire format (little-endian as per MS-SMB2)
     * @return 16-byte array representing the GUID in SMB wire format
     */
    public byte[] toBytes() {
        byte[] result = new byte[16];
        ByteBuffer bb = ByteBuffer.wrap(result).order(java.nio.ByteOrder.LITTLE_ENDIAN);

        void testReadBytesWireFormatNegativeAsUnsigned() {
            // Given
            byte[] buffer = new byte[10];
            // Write -1 which will be read as 65535 unsigned
            buffer[0] = (byte) 0xFF;
            buffer[1] = (byte) 0xFF;

            // When & Then
            SMBProtocolDecodingException exception =

     * This tests the underlying SMBUtil.readInt8 behavior.
     */
    @Test
    public void testGetTimestampNegative() {
        long expectedTimestamp = -1L; // Represents all bits set to 1 for an 8-byte long
        byte[] rawBytes = new byte[8];
        SMBUtil.writeInt8(expectedTimestamp, rawBytes, 0);
        AvTimestamp avTimestamp = new AvTimestamp(rawBytes);

        assertEquals(expectedTimestamp, avTimestamp.getTimestamp());
    }

    assertCrc(0x62a8ab43, fulls);
  }

  public void testFull100() {
    // Test 100 byte array of 0xFF.
    byte[] fulls = new byte[100];
    Arrays.fill(fulls, (byte) 0xFF);
    assertCrc(0xbc753add, fulls);
  }

  public void testAscending() {
    // Test 32 byte arrays of ascending.
    byte[] ascending = new byte[32];
    for (int i = 0; i < 32; i++) {
      ascending[i] = (byte) i;
    }

        void testReadParametersWireFormat() {
            byte[] buffer = new byte[10];
            int result = response.readParametersWireFormat(buffer, 0, 2);
            assertEquals(2, result);
        }

        @Test
        @DisplayName("Should write setup wire format")
        void testWriteSetupWireFormat() {
            byte[] buffer = new byte[100];
            int result = response.writeSetupWireFormat(buffer, 0);

        byte[] data = new byte[] { (byte) 0xF0, (byte) 0xDE, (byte) 0xBC, (byte) 0x9A, 0x78, 0x56, 0x34, 0x12 };
        PacDataInputStream pdis = createInputStream(data);
        assertEquals(0x123456789ABCDEF0L, pdis.readLong());
    }

    @Test
    public void testReadUnsignedByte() throws IOException {
        byte[] data = new byte[] { (byte) 0xFF };

    static final byte[] header = { (byte) 0xFF, (byte) 'S', (byte) 'M', (byte) 'B', (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00 };

    private static final SecureRandom RANDOM = new SecureRandom();

    private byte[] lmResponse;

    private byte[] ntResponse;

    private String domain;

    private String user;

    private String workstation;

    private byte[] masterKey = null;
    private byte[] sessionKey = null;

    static {
        DEFAULT_FLAGS = NTLMSSP_NEGOTIATE_NTLM