preauthService.validatePreauthIntegrity(sessionId, incorrectHash);
            fail("Expected CIFSException");
        } catch (CIFSException e) {
            // Expected
        }

        assertFalse(context.isValid());

        // Further operations on invalid context should fail
        assertThrows(CIFSException.class, () -> {
            preauthService.updatePreauthHash(sessionId, "test".getBytes());
        });

import org.junit.jupiter.api.Test;

import jcifs.CIFSException;
import jcifs.DialectVersion;
import jcifs.ResolverType;
import jcifs.SmbConstants;

/**
 * Test class for BaseConfiguration
 */
class BaseConfigurationTest {

    private BaseConfiguration config;

    @BeforeEach
    void setUp() throws CIFSException {
        config = new BaseConfiguration(false);
    }

    @Test

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs.smb;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSException;
import jcifs.SmbConstants;
import jcifs.SmbPipeHandle;
import jcifs.SmbPipeResource;
import jcifs.internal.smb1.trans.TransCallNamedPipe;
import jcifs.internal.smb1.trans.TransCallNamedPipeResponse;

        if (data == null) {
            throw new CIFSException("Data cannot be null");
        }
        return compress(data, 0, data.length, algorithm);
    }

    @Override
    public byte[] compress(byte[] data, int offset, int length, int algorithm) throws CIFSException {
        if (data == null) {
            throw new CIFSException("Data cannot be null");
        }

     *
     * @param data the data to compress
     * @param algorithm the compression algorithm to use
     * @return the compressed data
     * @throws CIFSException if compression fails
     */
    byte[] compress(byte[] data, int algorithm) throws CIFSException;

    /**
     * Compresses data using the specified algorithm with offset and length.
     *
     * @param data the data buffer

package jcifs.config;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import jcifs.CIFSException;
import jcifs.DialectVersion;

/**
 * Security configuration tests
 *
 * Verifies that default security settings are properly configured
 * according to SMB security best practices.
 */

                });
            } catch (CIFSException e) {
                // Expected
            }
        }

        assertEquals(State.OPEN, circuitBreaker.getState(), "Circuit should be OPEN");

        // Try to execute - should be blocked with CIFSException
        CIFSException exception = assertThrows(CIFSException.class, () -> {

        assertThrows(CIFSException.class, () -> {
            compressionService.compress(testData, CompressionService.COMPRESSION_LZNT1);
        });
    }

    @Test
    @DisplayName("Test unsupported algorithm decompression")
    public void testUnsupportedAlgorithmDecompression() {
        assertThrows(CIFSException.class, () -> {

            // If it doesn't throw, that's unexpected for localhost
            fail("Expected CIFSException for localhost multi-channel attempt");
        } catch (java.lang.reflect.InvocationTargetException e) {
            // We expect this to fail, but it should be a CIFSException, not a NullPointerException
            assertTrue(e.getCause() instanceof CIFSException);

     * @return the created context
     * @throws CIFSException if initialization fails
     */
    public PreauthIntegrityContext initializeSession(String sessionId, byte[] salt, int hashAlgorithm) throws CIFSException {
        if (sessionId == null || sessionId.isEmpty()) {
            throw new CIFSException("Session ID cannot be null or empty");
        }
        if (salt == null || salt.length < 16) {