@Override
        public byte[] initSecContext(byte[] token, int off, int len) throws CIFSException {
            if (token == null) {
                if (len == 0) {
                    return new byte[0];
                }
                throw new CIFSException("token is null but len > 0");
            }
            if (off < 0 || len < 0 || off > token.length || off + len > token.length) {

    }

    /**
     * Get the access token.
     * @param id The ID of the access token.
     * @return The access token.
     */
    public OptionalEntity<AccessToken> getAccessToken(final String id) {
        return accessTokenBhv.selectByPK(id);
    }

    /**
     * Store the access token.
     * @param accessToken The access token.
     */
    public void store(final AccessToken accessToken) {

        super();
    }

    /**
     * The unique identifier of the access token being edited.
     * This is a required field for identifying which token to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**
     * The username of the user who last updated this access token.
     * Used for audit trail purposes to track who made changes.
     */
    @Size(max = 1000)

     *
     * @param authType the type of authorization data
     * @param token the authorization data token
     * @param keys the Kerberos keys for decryption
     * @return a list of parsed authorization data
     * @throws PACDecodingException if the data cannot be decoded
     */
    public static List<KerberosAuthData> parse(int authType, byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {

    private static SpnegoToken getToken(final byte[] token, final int off, final int len) throws SpnegoException {
        byte[] b = new byte[len];
        if (off == 0 && token.length == len) {
            b = token;
        } else {
            System.arraycopy(token, off, b, 0, len);
        }
        return getToken(b);
    }

    private static SpnegoToken getToken(final byte[] token) throws SpnegoException {

 */
class KerberosTokenTest {

    /**
     * Test constructor with an empty token.
     */
    @Test
    void testConstructorWithEmptyToken() {
        byte[] emptyToken = new byte[0];
        assertThrows(PACDecodingException.class, () -> new KerberosToken(emptyToken));
    }

    /**
     * Test constructor with a malformed token (not ASN.1).
     */
    @Test
    void testConstructorWithMalformedToken() {

                .result());
    }

    // GET /api/admin/accesstoken/setting/{id}
    /**
     * Retrieves a specific access token setting by ID.
     *
     * @param id the access token ID to retrieve
     * @return JSON response with the access token setting
     */
    @Execute
    public JsonResponse<ApiResult> get$setting(final String id) {

     * Gets the server path with access token for API requests.
     *
     * @return the complete server path including the access token
     * @throws FessSystemException if no access token is available
     */
    public String getServerPath() {
        return getSessionManager().getAttribute(Constants.SEARCH_ENGINE_API_ACCESS_TOKEN, String.class)
                .map(token -> ADMIN_SERVER + token)

    /**
     * Constructs KerberosRelevantAuthData from token bytes.
     *
     * @param token the authorization data token
     * @param keys map of Kerberos keys indexed by key type
     * @throws PACDecodingException if decoding fails
     */
    public KerberosRelevantAuthData(byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {
        ASN1Sequence authSequence;

        setMechanismListMIC(mechanismListMIC);
    }

    /**
     * Constructs a NegTokenTarg by parsing the provided token bytes
     * @param token the SPNEGO token bytes to parse
     * @throws IOException if parsing fails
     */
    public NegTokenTarg(final byte[] token) throws IOException {
        parse(token);
    }

    /**
     * Gets the negotiation result code
     * @return the result code
     */