SMBUtil.writeInt4(TRANSFORM_PROTOCOL_ID, dst, dstIndex);
        dstIndex += 4;

        // Signature (16 bytes)
        System.arraycopy(this.signature, 0, dst, dstIndex, 16);
        dstIndex += 16;

        // Nonce (16 bytes)
        System.arraycopy(this.nonce, 0, dst, dstIndex, 16);
        dstIndex += 16;

        // Original message size
        SMBUtil.writeInt4(this.originalMessageSize, dst, dstIndex);

        SecretKeySpec key = new SecretKeySpec(new byte[16], "ARCFOUR");
        byte[] mac = PacMac.calculateMacArcfourHMACMD5(3, key, TEST_DATA);
        assertNotNull(mac);
        assertEquals(16, mac.length);

        // Test with a different key usage
        byte[] mac2 = PacMac.calculateMacArcfourHMACMD5(9, key, TEST_DATA);
        assertNotNull(mac2);
        assertEquals(16, mac2.length);

        // Test with another key usage

            SMBUtil.writeInt4(50, minBuffer, 8);
            SMBUtil.writeInt4(0, minBuffer, 12);
            SMBUtil.writeInt4(0, minBuffer, 16);

            int bytesRead = response.readBytesWireFormat(minBuffer, 0);
            assertEquals(16, bytesRead);
            assertEquals(100, response.getCount());
            assertEquals(50, response.getRemaining());

            // Large buffer

            assertEquals(16, derivedKey.length, "Should always produce 16-byte key regardless of input size");
        }
    }

    @Test
    @DisplayName("Should derive unique keys for different session keys")
    void testDeriveKeys_UniqueSessionKeys() {
        // Given
        byte[] sessionKey1 = new byte[16];
        byte[] sessionKey2 = new byte[16];
        new SecureRandom().nextBytes(sessionKey1);

        // The decode method returns only the header size (16 bytes)\n        assertEquals(16, bytesDecoded);
    }

    @Test
    @DisplayName("Test decode without data")
    void testDecodeWithoutData() throws SMBProtocolDecodingException {
        // Prepare test data - only header, no data
        byte[] buffer = new byte[16];
        int bufferIndex = 0;

        // Set up test values

    private static final int STRUCTURE_SIZE = 16;

    private byte[] fileId; // 16-byte file ID from previous open

    /**
     * Create a new durable handle reconnect context
     * @param fileId the 16-byte file ID from the previous open
     */
    public DurableHandleReconnect(byte[] fileId) {
        if (fileId.length != 16) {
            throw new IllegalArgumentException("File ID must be 16 bytes");
        }

	VMSLTVI		$17, V2, V3			// ERROR "signed immediate 16 must be in range [-16, 15]"
	VMSLTVI		$-16, V2, V3			// ERROR "signed immediate -17 must be in range [-16, 15]"
	VMSLTUVI	$17, V2, V3			// ERROR "signed immediate 16 must be in range [-16, 15]"
	VMSLTUVI	$-16, V2, V3			// ERROR "signed immediate -17 must be in range [-16, 15]"
	VMSGEVI		$17, V2, V3			// ERROR "signed immediate 16 must be in range [-16, 15]"

    void testReadBytesWireFormatValidStructure() throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;

        // Write valid structure (16 bytes)
        SMBUtil.writeInt2(16, buffer, offset); // Structure size
        buffer[offset + 2] = (byte) 0x01; // Share type (DISK)
        buffer[offset + 3] = 0; // Reserved

        dstIndex += 4;

        // Padding to align data to 8-byte boundary
        dstIndex += 4;

        // Write lease V2 data (52 bytes total)
        leaseKey.encode(dst, dstIndex); // LeaseKey (16 bytes)
        dstIndex += 16;

        SMBUtil.writeInt4(leaseState, dst, dstIndex); // LeaseState (4 bytes)
        dstIndex += 4;

        SMBUtil.writeInt4(leaseFlags, dst, dstIndex); // LeaseFlags (4 bytes)

     *
     * @param key 16-byte array
     * @throws IllegalArgumentException if key is not 16 bytes
     */
    public Smb2LeaseKey(byte[] key) {
        if (key == null) {
            throw new IllegalArgumentException("Lease key cannot be null");
        }
        if (key.length != LEASE_KEY_SIZE) {
            throw new IllegalArgumentException("Lease key must be 16 bytes, got " + key.length);
        }