key8[4] = (byte) (key[3] << 4 | (key[4] & 0xFF) >>> 4);
        key8[5] = (byte) (key[4] << 3 | (key[5] & 0xFF) >>> 5);
        key8[6] = (byte) (key[5] << 2 | (key[6] & 0xFF) >>> 6);
        key8[7] = (byte) (key[6] << 1);
        for (int i = 0; i < key8.length; i++) {
            key8[i] ^= Integer.bitCount(key8[i] ^ 1) & 1;
        }
        return key8;
    }

    /**

        Smb2LeaseKey key1 = new Smb2LeaseKey(testBytes1);
        Smb2LeaseKey key2 = new Smb2LeaseKey(testBytes2);
        Smb2LeaseKey key3 = new Smb2LeaseKey(testBytes3);

        assertEquals(key1, key2);
        assertNotEquals(key1, key3);
        assertNotEquals(key1, null);
        assertNotEquals(key1, "not a lease key");
        assertEquals(key1, key1); // reflexive
    }

    @Test

            KerberosKey[] keys = credentials.getKeys();
            assertEquals(0, keys.length);
        }
    }

    /**
     * Test getKey method when the requested key type exists.
     *
     * @throws LoginException if login fails.
     */
    @Test
    void testGetKey_KeyExists() throws LoginException {
        when(key1.getKeyType()).thenReturn(KEY_TYPE_1);

     *
     * @param key the base Kerberos key
     * @param constant the key derivation constant
     * @return the derived key bytes
     * @throws GeneralSecurityException if cryptographic operations fail
     */
    public static byte[] deriveKeyAES(KerberosKey key, byte[] constant) throws GeneralSecurityException {
        byte[] keybytes = key.getEncoded();

     *
     * @param key the key whose presence in this map is to be tested
     * @return true if this map contains a mapping for the specified key
     */
    @Override
    public boolean containsKey(final Object key) {
        return parent.containsKey(key);
    }

    /**
     * Returns true if this map maps one or more keys to the specified value.
     *

                for (KerberosKey key : keys) {
                    keysByAlgo.put(key.getKeyType(), key);
                }

                KerberosKey serverKey = keysByAlgo.get(encType.getValue().intValue());
                if (keysByAlgo.isEmpty() || serverKey == null) {
                    throw new PACDecodingException("Kerberos key not found for eType " + encType.getValue());
                }

        keys.put(PacSignature.ETYPE_ARCFOUR_HMAC, hmacKey);
        keys.put(PacSignature.ETYPE_AES128_CTS_HMAC_SHA1_96, aes128Key);
        keys.put(PacSignature.ETYPE_AES256_CTS_HMAC_SHA1_96, aes256Key);

        // Test HMAC-MD5
        byte[] mac1 = PacMac.calculateMac(PacSignature.KERB_CHECKSUM_HMAC_MD5, keys, TEST_DATA);
        assertNotNull(mac1);

        # String columns may not be needed
        # to be set these condition-keys basically.
        #; GreaterThan = map:{}
        #; LessThan = map:{}
        #; GreaterEqual = map:{}
        #; LessEqual = map:{}

        # [Exclude]
        # Common columns of String type may not be needed
        # to be set these condition-keys basically.
        #; !NotEqual = map:{ $$ALL$$ = list:{ $$CommonColumn$$ } }

    }

    /**
     * Retrieves an extractor for the specified key.
     * If multiple extractors are associated with the key, returns a composite extractor
     * that tries each extractor in order until one succeeds.
     *
     * @param key the key to look up
     * @return the extractor for the key, or null if not found
     */
    public Extractor getExtractor(final String key) {

     */
    public BeanMap() {
    }

    @Override
    public Object get(final Object key) {
        if (!containsKey(key)) {
            throw new IllegalKeyOfBeanMapException(key, this);
        }
        return super.get(key);
    }