private static final byte IPAD = (byte) 0x36;

    private static final byte OPAD = (byte) 0x5c;

    private MessageDigest md5;

    private byte[] ipad = new byte[BLOCK_LENGTH];

    private byte[] opad = new byte[BLOCK_LENGTH];

    /**
     * Creates an HMACT64 instance which uses the given secret key material.
     *
     * @param key The key material to use in hashing.
     */

        case "disni":
            RdmaProvider disniProvider = new DisniRdmaProvider();
            if (disniProvider.isAvailable()) {
                return disniProvider;
            }
            log.warn("DiSNI RDMA provider requested but not available");
            break;

        case "tcp":
            return new TcpRdmaProvider();

        default:

            InputStream is = new ByteArrayInputStream("test".getBytes());
            assertThrows(IOException.class, () -> Transport.readn(is, new byte[5], 0, 10));
        }

        @Test
        @DisplayName("readn should return 0 when no more bytes available")
        void shouldReturnZeroWhenStreamEmpty() throws IOException {
            InputStream is = new ByteArrayInputStream("Hi".getBytes());

                    } else {
                        populate(new InputStreamReader(new SmbFileInputStream(url)));
                    }
                } else if (line.startsWith("#BEGIN_ALTERNATE")) {
                    alt++;
                } else if (line.startsWith("#END_ALTERNATE") && alt > 0) {
                    alt--;
                    throw new IOException("no lmhosts alternate includes loaded");
                }

                state = 0;
                throw new TransportException("Connection in error", te);
            default:
                final TransportException te = new TransportException("Invalid state: " + state);
                state = 0;
                throw te;
            }

            state = 1;
            te = null;
            thread = new Thread(this, name);
            thread.setDaemon(true);

    /**
     * Creates a new source for the specified path.
     *
     * @param path the path to the file
     * @return a new Source instance
     * @throws NullPointerException if path is null
     */
    @Nonnull
    public static Source fromPath(@Nonnull Path path) {
        return new PathSource(requireNonNull(path, "path"));
    }

    /**
     * Creates a new build source for the specified path.

    // Tracking maps
    private final Map<String, AccountAttempts> accountAttempts = new ConcurrentHashMap<>();
    private final Map<String, IpAttempts> ipAttempts = new ConcurrentHashMap<>();
    private final AtomicInteger globalAttemptsInCurrentWindow = new AtomicInteger(0);
    private final AtomicLong currentWindowStart = new AtomicLong(System.currentTimeMillis());

    // Cleanup scheduler

    void testWriteSetupWireFormat() {
        byte[] buffer = new byte[100];
        int result = response.writeSetupWireFormat(buffer, 0);

        assertEquals(0, result);
    }

    @Test
    @DisplayName("Test writeParametersWireFormat returns 0")
    void testWriteParametersWireFormat() {
        byte[] buffer = new byte[100];
        int result = response.writeParametersWireFormat(buffer, 0);

                if (context == null) {
                    context = new byte[8];
                }
            }
            int data = 32;
            if (context != null) {
                data += 8;
            }
            if (targetInformation != null) {
                data += 8;
            }
            final byte[] type2 = new byte[data + target.length + (targetInformation != null ? targetInformation.length : 0)];

public class PreauthIntegrityServiceTest {

    private PreauthIntegrityService preauthService;
    private SecureRandom secureRandom;

    @BeforeEach
    public void setUp() {
        secureRandom = new SecureRandom();
        preauthService = new PreauthIntegrityService(secureRandom, PreauthIntegrityService.HASH_ALGO_SHA512, true);
    }

    @AfterEach
    public void tearDown() {
        if (preauthService != null) {