* and managing message metadata such as IDs, commands, and authentication information.
 *
 * @author mbechler
 */
public interface CommonServerMessageBlock extends Message {

    /**
     * Decode message data from the given byte array
     *
     * @param buffer the byte array containing the message data
     * @param bufferIndex the starting index in the buffer

     *
     * @return list of pending operations
     */
    public List<CommonServerMessageBlock> getPendingOperations() {
        return pendingOperations;
    }

    /**
     * Add a pending operation
     *
     * @param operation operation to add
     */
    public void addPendingOperation(CommonServerMessageBlock operation) {
        pendingOperations.add(operation);
    }

    /**

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.atomic.AtomicInteger;

import jcifs.internal.CommonServerMessageBlock;
import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.info.Smb2QueryDirectoryRequest;
import jcifs.internal.smb2.info.Smb2QueryInfoRequest;
import jcifs.internal.smb2.info.Smb2SetInfoRequest;

            byte[] data = new byte[128];
            Arrays.fill(data, (byte) 0x42);
            CommonServerMessageBlock request = mock(CommonServerMessageBlock.class);
            CommonServerMessageBlock response = mock(CommonServerMessageBlock.class);

            // Sign with first digest
            digest1.sign(data, 0, data.length, request, response);

     *
     * @see jcifs.internal.SMBSigningDigest#sign(byte[], int, int, jcifs.internal.CommonServerMessageBlock,
     *      jcifs.internal.CommonServerMessageBlock)
     */
    @Override
    public void sign(final byte[] data, final int offset, final int length, final CommonServerMessageBlock request,
            final CommonServerMessageBlock response) {
        // Validate input parameters
        if (data == null) {

    private Request<CommonServerMessageBlockResponse> request;

    @Mock
    private CommonServerMessageBlockResponse response;

    @Mock
    private CIFSContext context;

    @Mock
    private CommonServerMessageBlock disconnectRequest;

    @Mock
    private CommonServerMessageBlockRequest nextRequest;

    @BeforeEach
    void setUp() {
        // Reset mocks before each test

        // Create a defensive copy to avoid ConcurrentModificationException
        List<CommonServerMessageBlock> operationsCopy = List.copyOf(pendingOps);

        // Clear the failed channel's pending operations first
        failedChannel.clearPendingOperations();

        // Redistribute to healthy channels
        for (CommonServerMessageBlock op : operationsCopy) {
            try {

 */
class SMBSigningDigestTest {

    @Mock
    private SMBSigningDigest signingDigest;

    @Mock
    private CommonServerMessageBlock request;

    @Mock
    private CommonServerMessageBlock response;

    @Mock
    private CommonServerMessageBlock message;

    private byte[] testData;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);

     *
     * @see jcifs.internal.SMBSigningDigest#sign(byte[], int, int, jcifs.internal.CommonServerMessageBlock,
     *      jcifs.internal.CommonServerMessageBlock)
     */
    @Override
    public void sign(final byte[] data, final int offset, final int length, final CommonServerMessageBlock request,
            final CommonServerMessageBlock response) {
        if (log.isTraceEnabled()) {

     * @param request
     *            request message
     * @param response
     *            response message
     */
    void sign(byte[] data, int offset, int length, CommonServerMessageBlock request, CommonServerMessageBlock response);

    /**
     * Performs MAC signature verification. This calculates the signature
     * of the SMB and compares it to the signature field on the SMB itself.
     *
     * @param data