}
                }

                Map<Integer, KerberosKey> keysByAlgo = new HashMap<>();
                for (KerberosKey key : keys) {
                    keysByAlgo.put(key.getKeyType(), key);
                }

                KerberosKey serverKey = keysByAlgo.get(encType.getValue().intValue());
                if (keysByAlgo.isEmpty() || serverKey == null) {

     *
     * @return array of KerberosKey objects
     */
    public KerberosKey[] getKeys() {
        List<Key> serverKeys = new ArrayList<>();

        Set<Object> serverPrivateCredentials = this.subject.getPrivateCredentials();
        for (Object credential : serverPrivateCredentials) {
            if (credential instanceof KerberosKey) {
                serverKeys.add((KerberosKey) credential);
            }
        }

        Map<Integer, KerberosKey> keys = new HashMap<>();
        KerberosKey hmacKey = new KerberosKey(TEST_PRINCIPAL, new byte[16], PacSignature.ETYPE_ARCFOUR_HMAC, 0);
        KerberosKey aes128Key = new KerberosKey(TEST_PRINCIPAL, new byte[16], PacSignature.ETYPE_AES128_CTS_HMAC_SHA1_96, 0);
        KerberosKey aes256Key = new KerberosKey(TEST_PRINCIPAL, new byte[32], PacSignature.ETYPE_AES256_CTS_HMAC_SHA1_96, 0);

 */
package jcifs.pac.kerberos;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Enumeration;

import javax.security.auth.kerberos.KerberosKey;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.BERTags;

import jcifs.pac.PACDecodingException;

/**
 * Unit tests for the KerberosTicket class.
 */
@ExtendWith(MockitoExtension.class)
class KerberosTicketTest {

    @Mock
    private KerberosKey kerberosKey;

    private KerberosKey[] keys;

    private static final String SERVER_REALM = "EXAMPLE.COM";
    private static final String SERVER_PRINCIPAL_NAME = "krbtgt/EXAMPLE.COM";

import static org.mockito.Mockito.mockStatic;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.security.auth.kerberos.KerberosKey;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1Integer;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;

 */
class KerberosCredentialsTest {

    @Mock
    private LoginContext loginContext;

    @Mock
    private Subject subject;

    @Mock
    private KerberosKey key1;

    @Mock
    private KerberosKey key2;

    private static final String LOGIN_CONTEXT_NAME = "TestLoginContext";
    private static final int KEY_TYPE_1 = 1;
    private static final int KEY_TYPE_2 = 2;

    @BeforeEach

    private Map<Integer, KerberosKey> keys;

    @BeforeEach
    void setUp() {
        keys = new HashMap<>();
    }

    // Test successful PAC creation with mocked Pac construction
    @Test
    void testConstructorSuccess() throws PACDecodingException {
        // Setup key
        byte[] keyBytes = new byte[32];
        KerberosKey kdcKey = new KerberosKey(null, keyBytes, PacSignature.HMAC_SHA1_96_AES256, 1);

     */
    public static byte[] calculateMac(int type, Map<Integer, KerberosKey> keys, byte[] data) throws PACDecodingException {
        try {
            int usage = 17;
            if (type == PacSignature.KERB_CHECKSUM_HMAC_MD5) {
                KerberosKey key = keys.get(PacSignature.ETYPE_ARCFOUR_HMAC);
                if (key == null) {

import java.util.HashMap;
import java.util.Map;

import javax.security.auth.kerberos.KerberosKey;
import javax.security.auth.kerberos.KerberosPrincipal;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;

class PacTest {

    private Map<Integer, KerberosKey> keys;

    @BeforeEach
    void setUp() {
        keys = new HashMap<>();