/**
     * Calculates a MAC using the ARCFOUR-HMAC-MD5 algorithm.
     * This method implements the Microsoft variant of the Kerberos ARCFOUR-HMAC-MD5 checksum.
     *
     * @param keyusage the Kerberos key usage number for this operation
     * @param key the encryption key to use for MAC calculation
     * @param data the data to calculate the MAC for
     * @return the calculated MAC bytes

     * @param clientChallenge the client challenge bytes
     * @param nanos1601 the timestamp in nanoseconds since 1601
     * @param avPairs the AV pairs from the Type 2 message
     * @return the calculated response
     */
    public static byte[] getNTLMv2Response(final byte[] responseKeyNT, final byte[] serverChallenge, final byte[] clientChallenge,
            final long nanos1601, final byte[] avPairs) {

						for idx, sh := range parityData {
							calculated := splitData[idx]
							if !bytes.Equal(calculated, sh) {
								off := 0
								for i, v := range sh {
									if v != calculated[i] {
										off = i
										break
									}
								}
								calculated := calculated[off:]
								inFile := sh[off:]
								extra := ""
								if len(calculated) != len(inFile) {

    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /** Total number of records across all pages. */
    private int allRecordCount;

    /** Total number of pages calculated from record count and page size. */
    private int allPageCount;

    /** Flag indicating whether a previous page exists. */
    private boolean existPrePage;

    /** Flag indicating whether a next page exists. */

    }

    /**
     * Calculates the boost value for the given document data using the boost expression.
     * The method evaluates the boost expression and converts the result to a float value.
     * Supports Integer, Long, Float, Double, and String representations of numbers.
     *
     * @param map the document data as a map of field names to values
     * @return the calculated boost value as a float, or 0.0f if evaluation fails

     */
    public void setMic(final byte[] mic) {
        this.mic = mic;
    }

    /**
     * Checks whether a message integrity code (MIC) should be calculated for this message.
     *
     * @return whether a MIC should be calculated
     */
    public boolean isMICRequired() {
        return this.micRequired;
    }

    @Override
    public byte[] toByteArray() throws IOException {

            return; /* CRITICAL */
        }
        this.digest.update(input, offset, len);
        this.updates++;
    }

    /**
     * Finalize and return the calculated message digest
     *
     * @return calculated digest
     */
    public byte[] digest() {
        byte[] b = this.digest.digest();

        if (log.isTraceEnabled()) {
            log.trace("digest: ");

   * Returns the current sum. The returned value is NOT an atomic snapshot; invocation in
   * the absence of concurrent updates returns an accurate result, but concurrent updates that occur
   * while the sum is being calculated might not be incorporated.
   *
   * @return the sum
   */
  @Override
  public long sum() {
    long sum = base;
    Cell[] as = cells;
    if (as != null) {
      int n = as.length;

        // Expected result calculated manually for HMACT64 with this key and data
        HMACT64 hmac = new HMACT64(key);
        hmac.engineUpdate(data, 0, data.length);
        byte[] result = hmac.engineDigest();

        // Verify it produces a valid MD5 hash (16 bytes)
        assertNotNull(result);
        assertEquals(16, result.length);

        // Calculate the same using manual HMACT64 algorithm

    }

    /**
     * Calculates the LMv2 response for NTLM authentication.
     *
     * @param type2 the Type-2 message containing the server challenge
     * @param domain the domain name
     * @param user the username
     * @param password the user's password
     * @param clientChallenge the client challenge bytes
     * @return the calculated LMv2 response
     */