* @return tree instance
     */
    SmbTree getSmbTree ( String share, String service );


    /**
     * Initiate reauthentication
     * 
     * @throws CIFSException
     */
    void reauthenticate () throws CIFSException;

                }
            }
        }
    }


    @Override
    @SuppressWarnings ( "unchecked" )
    public void reauthenticate () throws CIFSException {
        try ( SmbTransportImpl trans = getTransport() ) {
            reauthenticate(trans, this.targetDomain, null, null, Collections.EMPTY_SET);
        }
    }


    /**
     * @param trans
     * @param andx

              SmbSessionInternal session = (SmbSessionInternal) th.getSession() ) {
            Assume.assumeTrue("Not SMB2", th.isSMB2());
            f.exists();
            session.reauthenticate();
            f.exists();
        }
    }


    @Test
    public void testSessionExpiration () throws Exception {

import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.Response
import okhttp3.Route

class Authenticate {
  private val client =
    OkHttpClient.Builder()
      .authenticator(
        object : Authenticator {
          @Throws(IOException::class)
          override fun authenticate(
            route: Route?,
            response: Response,
          ): Request? {

import okhttp3.Request;
import okhttp3.Response;

public final class Authenticate {
  private final OkHttpClient client;

  public Authenticate() {
    client = new OkHttpClient.Builder()
        .authenticator((route, response) -> {
          if (response.request().header("Authorization") != null) {
            return null; // Give up, we've already attempted to authenticate.
          }

        .add("WWW-Authenticate", "Basic realm=myrealm")
        .add("WWW-Authenticate", "Digest")
        .build()
    assertThat(headers.parseChallenges("WWW-Authenticate")).containsExactly(
      Challenge("Basic", mapOf("realm" to "myrealm")),
      Challenge("Digest", mapOf()),
    )
  }

  @Test fun multipleBasicAuthenticateHeaders() {
    val headers =
      Headers.Builder()

):
    if security_scopes.scopes:
        authenticate_value = f'Bearer scope="{security_scopes.scope_str}"'
    else:
        authenticate_value = "Bearer"
    credentials_exception = HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": authenticate_value},
    )
    try:

   */
  @Throws(IOException::class)
  fun authenticate(
    route: Route?,
    response: Response,
  ): Request?

  companion object {
    /** An authenticator that knows no credentials and makes no attempt to authenticate. */
    @JvmField
    val NONE: Authenticator = AuthenticatorNone()

    private class AuthenticatorNone : Authenticator {
      override fun authenticate(
        route: Route?,

            }
            catch ( SmbAuthException sae ) {
                response.setHeader("WWW-Authenticate", "NTLM");
                if ( offerBasic ) {
                    response.addHeader("WWW-Authenticate", "Basic realm=\"" + this.realm + "\"");
                }
                response.setHeader("Connection", "close");

    form_data: OAuth2PasswordRequestForm = Depends(),
) -> Token:
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Bearer"},
        )