/** Can still coalesce when pinning is used if pins match.  */
  @Test
  fun coalescesWhenCertificatePinsMatch() {
    val pinner =
      CertificatePinner
        .Builder()
        .add("san.com", pin(certificate.certificate))
        .build()
    client = client.newBuilder().certificatePinner(pinner).build()
    server.enqueue(MockResponse())
    server.enqueue(MockResponse())

        )
      },
    )

  /**
   * ```
   * Certificate ::= SEQUENCE  {
   *   tbsCertificate       TBSCertificate,
   *   signatureAlgorithm   AlgorithmIdentifier,
   *   signatureValue       BIT STRING
   * }
   * ```
   */
  internal val certificate: BasicDerAdapter<Certificate> =
    Adapters.sequence(
      "Certificate",
      tbsCertificate,
      algorithmIdentifier,

* Traefik (que também pode gerenciar a renovação de certificados)
* Caddy (que também pode gerenciar a renovação de certificados)
* Nginx
* HAProxy

## Let's Encrypt

Antes de Let's Encrypt, esses **certificados HTTPS** eram vendidos por terceiros confiáveis.

O processo de aquisição de um desses certificados costumava ser complicado, exigia bastante papelada e os certificados eram bastante caros.

    assertTrue(pin.matchesCertificate(certA1.certificate))
    assertFalse(pin.matchesCertificate(certB1.certificate))
  }

  @Test fun testMatchesSha1() {
    val pin = Pin("example.com", certC1Sha1Pin)
    assertTrue(pin.matchesCertificate(certC1.certificate))
    assertFalse(pin.matchesCertificate(certB1.certificate))
  }

  @Test fun pinList() {
    val builder =

      val keyManager =
        newKeyManager(
          null,
          serverCert,
          serverIntermediateCa.certificate,
        )
      val trustManager =
        newTrustManager(
          null,
          Arrays.asList(serverRootCa.certificate, clientRootCa.certificate),
          emptyList(),
        )
      val sslContext = SSLContext.getInstance("TLS")
      sslContext.init(

import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import okhttp3.tls.HandshakeCertificates;
import okhttp3.tls.HeldCertificate;

/**
 * Create an HTTPS server with a self-signed certificate that OkHttp trusts.
 */
public class HttpsServer {
  public void run() throws Exception {
    HeldCertificate localhostCertificate = new HeldCertificate.Builder()
        .addSubjectAlternativeName("localhost")

      8V0vxo1pHXnbBrnxhS/Z3TBerw8RyQqcaWOdp+pBXyIWmR+jHk9cHZCqQveTIBsY
      jaA9VEhgdaVhxBsT2qzUNDsXlOzGsliznDfoqETb
      -----END CERTIFICATE-----
      
      """.trimIndent()
    val certificate = certificateString.decodeCertificatePem()
    assertEquals(certificateString, certificate.certificatePem())
  }

import java.util.Map;

import javax.security.auth.kerberos.KerberosKey;

import jcifs.pac.PACDecodingException;
import jcifs.pac.Pac;

/**
 * Kerberos authorization data containing PAC (Privilege Attribute Certificate) information.
 */
public class KerberosPacAuthData extends KerberosAuthData {

    private Pac pac;

    /**
     * Constructs KerberosPacAuthData from token bytes.
     *

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      for (Certificate certificate : response.handshake().peerCertificates()) {
        System.out.println(CertificatePinner.pin(certificate));
      }
    }
  }

  public static void main(String... args) throws Exception {
    new CertificatePinning().run();
  }

import okhttp3.OkHttpClient;
import okhttp3.Protocol;
import okhttp3.Request;
import okhttp3.Response;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.io.IOException;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * Simple test adaptable to show a failure in older versions of OkHttp