/**
     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#withDefaultCredentials()
     */
    @Override
    public CIFSContext withDefaultCredentials() {
        return withCredentials(getDefaultCredentials());
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#withGuestCrendentials()
     */
    @Override
    public CIFSContext withGuestCrendentials() {

    /** The CIFS context for this authentication */
    private CIFSContext context;

    /**
     *
     */
    private NtlmPasswordAuthentication() {
    }

    /**
     * Construct anonymous credentials
     *
     * @param tc the CIFS context to use
     */
    public NtlmPasswordAuthentication(final CIFSContext tc) {
        this(tc, "", "", "");
    }

    /**

        // Verify source exists
        CIFSContext verifyContext = createFreshContext();
        SmbFile verifySource = new SmbFile(baseUrl + "shared/" + sourceFileName, verifyContext);
        assertTrue(verifySource.exists(), "Source file should exist");

        // Perform rename using copy+delete as this is more reliable with Docker/Samba
        CIFSContext renameContext = createFreshContext();

            transportContextField.set(ntlmServlet, cifsContext);
        } catch (Exception e) {
            throw new RuntimeException("Failed to inject mock CIFSContext", e);
        }

        when(cifsContext.getTransportPool()).thenReturn(transportPool);
        when(cifsContext.getNameServiceClient()).thenReturn(nameServiceClient);
        lenient().when(cifsContext.getConfig()).thenReturn(configuration);

import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.util.Encdec;

@ExtendWith(MockitoExtension.class)
class NtlmUtilTest {

    @Mock
    CIFSContext cifsContext;

    @Mock
    Configuration configuration;

    // Helper: decode hex string to bytes

}
```

### With Authentication

```java
import jcifs.CIFSContext;
import jcifs.context.BaseContext;
import jcifs.smb.NtlmPasswordAuthenticator;

// Create context with credentials
CIFSContext context = new BaseContext(new jcifs.config.PropertyConfiguration());
NtlmPasswordAuthenticator auth = new NtlmPasswordAuthenticator("domain", "username", "password");
CIFSContext authContext = context.withCredentials(auth);

    /**
     * The SMB authentication holder.
     */
    protected volatile SmbAuthenticationHolder smbAuthenticationHolder;

    /**
     * The CIFS context.
     */
    protected CIFSContext cifsContext;

    /**
     * Creates a new SmbClient instance.
     */
    public SmbClient() {
        super();
    }

    /**
    * Initializes the SMB client.

    @Override
    public SmbTransportImpl getSmbTransport(final CIFSContext tc, final Address address, final int port, final boolean nonPooled) {
        return getSmbTransport(tc, address, port, tc.getConfig().getLocalAddr(), tc.getConfig().getLocalPort(), null, nonPooled);
    }

    @Override
    public SmbTransportImpl getSmbTransport(final CIFSContext tc, final Address address, final int port, final boolean nonPooled,

import org.junit.jupiter.api.Timeout;
import org.mockito.Mockito;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.Credentials;

/**
 * Simple memory management tests to validate basic resource cleanup functionality
 */
public class SimpleMemoryManagementTest {

    private CIFSContext mockContext;
    private SmbTransportImpl mockTransport;
    private Configuration mockConfig;

            }
        }

    }

    /**
     *
     * {@inheritDoc}
     *
     * @see jcifs.SidResolver#getLocalGroupsMap(jcifs.CIFSContext, java.lang.String, int)
     */
    @Override
    public Map<jcifs.SID, List<jcifs.SID>> getLocalGroupsMap(final CIFSContext tc, final String authorityServerName, final int flags)
            throws CIFSException {
        final SID domSid = getServerSid(tc, authorityServerName);