assertEquals((byte) 0x53, aad[2]);
        assertEquals((byte) 0xFD, aad[3]);

        // Verify signature is zeroed out (16 bytes of zeros)
        for (int i = 4; i < 20; i++) {
            assertEquals(0, aad[i], "Signature bytes should be zero in AAD");
        }

        // Verify nonce matches at position 20
        for (int i = 0; i < 16; i++) {

        assertArrayEquals(testFileId, copiedFileId);
    }

    @Test
    @DisplayName("Test with various file ID patterns")
    void testWithVariousFileIdPatterns() {
        // Test with all zeros
        byte[] zeroFileId = new byte[16];
        Smb2CloseRequest zeroRequest = new Smb2CloseRequest(mockConfig, zeroFileId, testFileName);
        testFileIdInRequest(zeroRequest, zeroFileId);

        srvsvc.ShareInfo502 info502 = new srvsvc.ShareInfo502();
        byte[] securityDescriptorBytes = new byte[20];
        securityDescriptorBytes[0] = 1; // revision
        // Rest are zeros - no DACL
        info502.security_descriptor = securityDescriptorBytes;
        info502.sd_size = securityDescriptorBytes.length;

        // Replace info field

            buf.writeOctetArray(contextHandle, 0, Math.min(contextHandle.length, 20));
            // Pad with zeros if context handle is shorter than 20 bytes
            for (int i = contextHandle.length; i < 20; i++) {
                buf.enc_ndr_small(0);
            }
        } else {
            // Write 20 zero bytes for null context handle
            for (int i = 0; i < 20; i++) {
                buf.enc_ndr_small(0);

    }

    @Test
    @DisplayName("Should handle edge case with all zero session key")
    void testDeriveKeys_AllZeroSessionKey() {
        // Given
        byte[] zeroSessionKey = new byte[16]; // All zeros
        int dialect = Smb2Constants.SMB2_DIALECT_0311;

        // When

        checkNodeStatusData();
        return isPermanent;
    }

    /**
     * Retrieves the MAC address of the remote network interface. Samba returns all zeros.
     *
     * @return the MAC address as an array of six bytes
     * @throws UnknownHostException if the host cannot be resolved to
     * determine the MAC address.
     */

    @Test
    @DisplayName("Cache size 0: release zeroes but does not cache; getBuffer allocates new")
    void zeroSizedCacheDoesNotStore() {
        BufferCacheImpl impl = new BufferCacheImpl(0, 8);
        byte[] supplied = new byte[3];
        supplied[0] = 1;
        supplied[1] = 2;

        // Release must not throw and must zero the supplied array

        // Test with zero
        byte[] zeroBytes = new byte[] { 0x00, 0x00, 0x00, 0x00 };
        AvFlags zeroAvFlags = new AvFlags(zeroBytes);
        assertNotNull(zeroAvFlags, "AvFlags object should not be null for zero bytes");
        assertEquals(0, zeroAvFlags.getFlags(), "Flags should be 0 for zero bytes");

        // Test with negative integer (two's complement)

    void testEncodeZeroLength() {
        // Test encoding with zero length
        byte[] data = { 0x01, 0x02, 0x03 };
        ByteEncodable encodable = new ByteEncodable(data, 0, 0);
        byte[] dest = new byte[3];

        int encodedLen = encodable.encode(dest, 0);

        // Verify encoded length
        assertEquals(0, encodedLen, "Encoded length should be zero for zero length encodable");

 *
 */
public class UnicodeString extends rpc.unicode_string {

    boolean zterm;

    /**
     * Constructs a UnicodeString with zero termination option.
     *
     * @param zterm
     *            whether the string should be zero terminated
     */
    public UnicodeString(final boolean zterm) {
        this.zterm = zterm;
    }

    /**