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

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+
     */

 */
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 {

# 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);

# Persistent Handles Feature - Detailed Design Document

## 1. Overview

Persistent handles (also known as durable handles) allow SMB3 connections to survive network disconnections, server reboots, and client reconnections. This feature is critical for enterprise reliability and seamless failover scenarios.

## 2. Protocol Specification Reference

- **MS-SMB2 Section 2.2.13.2.3**: SMB2_CREATE_DURABLE_HANDLE_REQUEST

 *
 * 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
     */