- **Pre-Authentication Integrity**: SMB 3.1.1 PAI for preventing downgrade attacks
- **Automatic Detection**: Encryption automatically enabled when servers require it
- **Secure Key Management**: Proper key derivation and nonce generation

### Core Features
- **Per-context configuration**: No global state, each context encapsulates configuration
- **Authentication**: NTLM, Kerberos, SPNEGO unified subsystem

import jakarta.annotation.Resource;

/**
 * Admin action for File Authentication management.
 *
 */
public class AdminFileauthAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminFileauthAction() {
        super();
    }

    /** The role name for file authentication administration. */
    public static final String ROLE = "admin-fileauth";

import org.lastaflute.web.response.JsonResponse;

import jakarta.annotation.Resource;

/**
 * API action for admin file authentication management.
 * Provides RESTful API endpoints for managing file authentication settings in the Fess search engine.
 * File authentication settings define access credentials and permissions for file-based crawling.
 *
 */
public class ApiAdminFileauthAction extends FessApiAdminAction {

 *
 * This class provides Single Sign-On (SSO) authentication using the SPNEGO protocol,
 * which is commonly used for Kerberos-based authentication in Windows environments.
 * It handles the negotiation between client and server to establish a secure
 * authentication context without requiring users to explicitly enter credentials.
 *

    * target authentication realm is a share (presumably for share-level
    * authentication).
    */
    int NTLMSSP_TARGET_TYPE_SHARE = 0x00040000;

    /**
    * Indicates that the NTLM2 signing and sealing scheme should be used
    * for protecting authenticated communications.  This refers to a
    * particular session security scheme, and is not related to the use
    * of NTLMv2 authentication.
    */

 * to interact with SMB resources.
 *
 * <p>
 * This client supports authentication, content retrieval, and metadata extraction from SMB files.
 * It handles file access, directory listing, and access control entries (ACEs) processing.
 * </p>
 *
 * <p>
 * The class provides methods to:
 * </p>
 * <ul>
 *   <li>Initialize the client with SMB authentication details.</li>
 *   <li>Retrieve content and metadata from SMB files.</li>

        }
        auth = a;
    }

    /**
     * Gets the URL that is requesting authentication.
     * @return the URL requiring authentication
     */
    protected final String getRequestingURL() {
        return url;
    }

    /**
     * Gets the authentication exception that triggered this request.
     * @return the authentication exception
     */
    protected final SmbAuthException getRequestingException() {

import jakarta.validation.constraints.Size;

/**
 * Form class for editing file authentication configurations in the admin interface.
 * This form extends CreateForm to include fields necessary for updating existing file authentication entries,
 * including tracking information for optimistic locking and audit trails.
 * File authentication configurations define access control for file system crawling operations.
 *
 */

    public String protocolScheme;

    /** The username for file authentication (required, maximum 100 characters). */
    @Required
    @Size(max = 100)
    public String username;

    /** The password for file authentication (maximum 100 characters). */
    @Size(max = 100)
    public String password;

    /** Additional parameters for file authentication (maximum 1000 characters). */
    @Size(max = 1000)

        this.port = port;
    }

    /**
     * Returns the username for SMB authentication.
     * @return the username
     */
    public String getUsername() {
        return username;
    }

    /**
     * Sets the username for SMB authentication.
     * @param username the username to set
     */
    public void setUsername(final String username) {