import java.nio.charset.StandardCharsets;

import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;

/**
 * File System Control Code (FSCC) structure for File Rename Information.
 * Used in SMB2/SMB3 set file information operations to rename files or directories,
 * with support for specifying whether to replace existing files with the same name.
 *
 * @author mbechler
 */

 */
package jcifs.internal.smb2.lease;

import java.security.SecureRandom;
import java.util.Arrays;

/**
 * SMB2 Lease Key
 *
 * Represents a 16-byte lease key used to identify leases in SMB2/SMB3
 * MS-SMB2 2.2.13.2.8
 */
public class Smb2LeaseKey {

    private final byte[] key;
    private static final SecureRandom RANDOM = new SecureRandom();
    private static final int LEASE_KEY_SIZE = 16;

    /**

import jcifs.Configuration;
import jcifs.config.PropertyConfiguration;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.smb2.nego.CompressionNegotiateContext;

/**
 * Comprehensive tests for SMB3 compression negotiate context.
 */
public class CompressionNegotiateContextTest {

    private Configuration config;
    private CompressionNegotiateContext context;

    @BeforeEach

 */
package jcifs.internal.smb2;

import jcifs.Encodable;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Transform Header for encrypted messages
 *
 * This header is used to encrypt SMB2/SMB3 messages and provides the necessary
 * cryptographic parameters for decryption including the nonce, session ID, and
 * authentication tag.
 *
 * @author mbechler
 */
public class Smb2TransformHeader implements Encodable {

import java.util.EnumSet;
import java.util.Set;

import jcifs.internal.smb2.Smb2Constants;

/**
 * Enumeration of SMB protocol dialect versions supported by JCIFS.
 * This includes legacy SMB1/CIFS as well as modern SMB2/SMB3 dialects.
 *
 * @author mbechler
 */
public enum DialectVersion {

    /**
     * Legacy SMB1/CIFS
     */
    SMB1,

    /**
     * SMB 2.02 - Windows Vista+
     */

     * @return the selectedDialect
     */
    @Override
    public DialectVersion getSelectedDialect() {
        return this.selectedDialect;
    }

    /**
     * Gets the encryption cipher selected for SMB3 encryption.
     *
     * @return the selectedCipher
     */
    public int getSelectedCipher() {
        return this.selectedCipher;
    }

    /**

# Directory Leasing Feature - Detailed Design Document

## 1. Overview

Directory leasing extends the SMB3 lease concept to directories, enabling client-side caching of directory metadata and change notifications. This significantly improves performance for applications that frequently enumerate directories or monitor directory changes.

## 2. Protocol Specification Reference

- **MS-SMB2 Section 2.2.13.2.12**: SMB2_CREATE_REQUEST_LEASE_V2 for directories

        assertEquals(16, nonce2.length, "GCM nonce should be 16 bytes");
        assertFalse(Arrays.equals(nonce1, nonce2), "Consecutive nonces should be different");
    }

    @Test
    @DisplayName("Should generate SMB3-compliant nonces with guaranteed uniqueness")
    void testSMB3CompliantNonceGeneration() {
        // Given - GCM cipher context

import java.util.concurrent.locks.ReentrantReadWriteLock;

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

import jcifs.CIFSContext;
import jcifs.smb.SmbFile;

/**
 * SMB2/SMB3 Lease Manager
 *
 * Manages lease state for SMB2/SMB3 connections
 */
public class LeaseManager {

    private static final Logger log = LoggerFactory.getLogger(LeaseManager.class);

 *
 * This utility class provides static methods that enhance SmbFile operations with
 * directory leasing capabilities for improved performance through caching when
 * SMB3 directory leasing is available and enabled.
 */
public class SmbFileDirectoryLeasingExtension {

    /**
     * Private constructor to prevent instantiation of this utility class
     */