/**
 * Represents a Kerberos AP-REQ (Application Request) message.
 * This class parses and contains the authentication request sent from a client to a server.
 */
public class KerberosApRequest {

    private byte apOptions;
    private KerberosTicket ticket;

    /**
     * Creates a Kerberos AP request from a token.
     *
     * @param token the Kerberos AP-REQ token

    void sequenceConstructor_minimal_valid_setsApOptions_noTicket() throws Exception {
        // Arrange
        byte ap = (byte) 0x7A;
        ASN1Sequence seq = buildMinimalApReqSeq(ap);

        // Act
        KerberosApRequest req = new KerberosApRequest(seq, null);

        // Assert
        assertEquals(ap, req.getApOptions(), "apOptions should reflect BIT STRING's first byte");

     *
     * @return the KerberosTicket object
     */
    public KerberosTicket getTicket() {
        return this.apRequest.getTicket();
    }

    /**
     * Returns the Kerberos AP request.
     *
     * @return the KerberosApRequest object
     */
    public KerberosApRequest getApRequest() {
        return this.apRequest;
    }

 */
public interface KerberosConstants {

    /** Kerberos OID identifier */
    String KERBEROS_OID = "1.2.840.113554.1.2.2";
    /** Kerberos protocol version */
    String KERBEROS_VERSION = "5";

    /** Kerberos AP-REQ message type */
    String KERBEROS_AP_REQ = "14";

    /** Address family: Internet (IPv4) */
    int AF_INTERNET = 2;
    /** Address family: CHANET */
    int AF_CHANET = 5;
    /** Address family: XNS */

    private String serverRealm;
    private KerberosEncData encData;

    /**
     * Constructs a KerberosTicket from token bytes.
     *
     * @param token the ticket token bytes
     * @param apOptions AP options flags
     * @param keys array of Kerberos keys for decryption
     * @throws PACDecodingException if ticket decoding fails
     */

     *
     * @throws IOException if an I/O error occurs
     */
    @Test
    void testConstructorWithWrongTagClass() throws IOException {
        // Create AP-REQ structure
        ASN1Sequence apReqSequence = new DERSequence(new ASN1Encodable[] { new DERTaggedObject(true, 0, new ASN1Integer(5)), // pvno
                new DERTaggedObject(true, 1, new ASN1Integer(14)), // msg-type