@Test
  fun heldCertificate() {
    val heldCertificate: HeldCertificate = HeldCertificate.Builder().build()
    val certificate: X509Certificate = heldCertificate.certificate
    val keyPair: KeyPair = heldCertificate.keyPair
    val certificatePem: String = heldCertificate.certificatePem()
    val privateKeyPkcs8Pem: String = heldCertificate.privateKeyPkcs8Pem()
    val privateKeyPkcs1Pem: String = heldCertificate.privateKeyPkcs1Pem()
  }

     * transmitting it is unnecessary.
     */
    fun heldCertificate(
      heldCertificate: HeldCertificate,
      vararg intermediates: X509Certificate,
    ) = apply {
      this.heldCertificate = heldCertificate
      this.intermediates = arrayOf(*intermediates) // Defensive copy.
    }

    /**

  @Test
  fun commonName() {
    val heldCertificate =
      HeldCertificate
        .Builder()
        .commonName("cash.app")
        .build()
    val certificate = heldCertificate.certificate
    assertThat(certificate.getSubjectX500Principal().name).isEqualTo("CN=cash.app")
  }

  @Test
  fun organizationalUnit() {
    val heldCertificate =
      HeldCertificate
        .Builder()

  }

  @Test fun `bad certificates host in insecureHosts fails with SSLException`() {
    val heldCertificate =
      HeldCertificate
        .Builder()
        .addSubjectAlternativeName("example.com")
        .build()
    val serverCertificates =
      HandshakeCertificates
        .Builder()
        .heldCertificate(heldCertificate)
        .build()
    server.useHttps(serverCertificates.sslSocketFactory())

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")
        .build();

import kotlin.test.assertFailsWith
import okhttp3.Handshake.Companion.handshake
import okhttp3.tls.HeldCertificate
import org.junit.jupiter.api.Test

class HandshakeTest {
  val serverRoot =
    HeldCertificate
      .Builder()
      .certificateAuthority(1)
      .build()
  val serverIntermediate =
    HeldCertificate
      .Builder()
      .certificateAuthority(0)
      .signedBy(serverRoot)
      .build()

      val heldCertificate =
        HeldCertificate
          .Builder()
          .commonName(hostname)
          .addSubjectAlternativeName(hostname)
          .build()
      HandshakeCertificates
        .Builder()
        .heldCertificate(heldCertificate)
        .addTrustedCertificate(heldCertificate.certificate)
        .build()
    }

   */
  @Test
  fun domainFronting() {
    val heldCertificate =
      HeldCertificate
        .Builder()
        .commonName("server name")
        .addSubjectAlternativeName("url-host.com")
        .build()
    val handshakeCertificates =
      HandshakeCertificates
        .Builder()
        .heldCertificate(heldCertificate)
        .addTrustedCertificate(heldCertificate.certificate)
        .build()

  companion object {
    val certA1 =
      HeldCertificate
        .Builder()
        .serialNumber(100L)
        .build()
    val certA1Sha256Pin = pin(certA1.certificate)
    val certB1 =
      HeldCertificate
        .Builder()
        .serialNumber(200L)
        .build()
    val certB1Sha256Pin = pin(certB1.certificate)
    val certC1 =
      HeldCertificate
        .Builder()
        .serialNumber(300L)

    assertThat(encoded).isEqualTo(privateKeyInfoByteString)
  }

  @Test
  fun `RSA issuer and signature`() {
    val root =
      HeldCertificate
        .Builder()
        .certificateAuthority(0)
        .rsa2048()
        .build()
    val certificate =
      HeldCertificate
        .Builder()
        .signedBy(root)
        .rsa2048()
        .build()