route: Route?,
    response: Response,
  ): Request? {
    val challenges = response.challenges()
    val request = response.request
    val url = request.url
    val proxyAuthorization = response.code == 407
    val proxy = route?.proxy ?: Proxy.NO_PROXY

    for (challenge in challenges) {
      if (!"Basic".equals(challenge.scheme, ignoreCase = true)) {
        continue
      }

     * @param resp The response.
     * @param challenge The domain controller challenge.
     * @return the authenticated NtlmPasswordAuthentication object
     * @throws IOException If an IO error occurs.
     * @throws ServletException If an error occurs.
     */
    public NtlmPasswordAuthentication doAuthentication(final HttpServletRequest req, final HttpServletResponse resp, final byte[] challenge)
            throws IOException, ServletException {

 */
fun Headers.parseChallenges(headerName: String): List<Challenge> {
  val result = mutableListOf<Challenge>()
  for (h in 0 until size) {
    if (headerName.equals(name(h), ignoreCase = true)) {
      val header = Buffer().writeUtf8(value(h))
      try {
        header.readChallengeHeader(result)
      } catch (e: EOFException) {
        Platform.get().log("Unable to parse challenge", Platform.WARN, e)
      }
    }
  }

        void testConstructorSetsFields() {
            byte[] challenge = new byte[] { 1, 2, 3 };
            UniAddress dc = mock(UniAddress.class);

            NtlmChallenge nc = new NtlmChallenge(challenge, dc);

            assertSame(challenge, nc.challenge);
            assertSame(dc, nc.dc);
        }

        @Test
        @DisplayName("Constructor accepts null challenge")
        void testConstructorAcceptsNullChallenge() {

 * challenge. The proxy authenticator may return either an authenticated request, or null to
 * connect without authentication.
 *
 * ```java
 * for (Challenge challenge : response.challenges()) {
 *   // If this is preemptive auth, use a preemptive credential.
 *   if (challenge.scheme().equalsIgnoreCase("OkHttp-Preemptive")) {

        return NtlmContext.NTLMSSP_OID.equals(mechanism);
    }

    /**
     * Computes the 24 byte ANSI password hash given the 8 byte server challenge.
     *
     * @param tc the CIFS context
     * @param chlng the server challenge
     * @return the hash for the given challenge
     * @throws GeneralSecurityException if a security error occurs
     * @deprecated NTLMv1 is insecure. Use NTLMv2 (LM compatibility level 3 or higher)

     *            The response.
     * @param challenge
     *            The domain controller challenge.
     * @return credentials passed in the servlet request
     * @throws IOException
     *             If an IO error occurs.
     */
    public NtlmPasswordAuthentication doAuthentication(final CIFSContext tc, final HttpServletRequest req, final HttpServletResponse resp,
            final byte[] challenge) throws IOException {

                    }
                    dc = chal.dc;
                    challenge = chal.challenge;
                } else {
                    dc = UniAddress.getByName(domainController, true);
                    challenge = SmbSession.getChallenge(dc);
                }

                ntlm = NtlmSsp.authenticate(req, resp, challenge);
                if (ntlm == null) {
                    return null;

     * Generates a Type 3 NTLM message.
     *
     * @param username the username
     * @param password the password
     * @param domain the domain
     * @param workstation the workstation
     * @param challenge the Type 2 challenge message
     * @return the Base64-encoded Type 3 message
     * @throws NTLMEngineException if an NTLM engine error occurs
     * @throws CrawlingAccessException if an error occurs during message generation
     */

                    }
                    dc = chal.dc;
                    challenge = chal.challenge;
                } else {
                    dc = getTransportContext().getNameServiceClient().getByName(this.domainController, true);
                    challenge = getTransportContext().getTransportPool().getChallenge(getTransportContext(), dc);
                }