.certificateAuthority(1)
        .commonName("root")
        .addSubjectAlternativeName("root_ca.com")
        .build()
    serverIntermediateCa =
      HeldCertificate.Builder()
        .signedBy(serverRootCa)
        .certificateAuthority(0)
        .serialNumber(2L)
        .commonName("intermediate_ca")
        .addSubjectAlternativeName("intermediate_ca.com")
        .build()
    serverCert =

      .isCloseTo(now.toDouble() + durationMillis, deltaMillis)
  }

  @Test
  fun subjectAlternativeNames() {
    val heldCertificate =
      HeldCertificate.Builder()
        .addSubjectAlternativeName("1.1.1.1")
        .addSubjectAlternativeName("cash.app")
        .build()
    val certificate = heldCertificate.certificate
    assertThat(certificate.subjectAlternativeNames.toList()).containsExactly(

    // https://www.gosecure.net/blog/2020/10/27/weakness-in-java-tls-host-verification/
    val heldCertificate =
      HeldCertificate.Builder()
        .commonName("Foo Corp")
        .addSubjectAlternativeName("k.com")
        .addSubjectAlternativeName("tel.com")
        .build()
    val session = session(heldCertificate.certificatePem())
    assertThat(verifier.verify("foo.com", session)).isFalse()

        .commonName("attacker")
        .addSubjectAlternativeName("attacker.com")
        .signedBy(pinnedIntermediate)
        .build()
    val phonyVictim =
      HeldCertificate.Builder()
        .serialNumber(6L)
        .signedBy(attackerSwitch)
        .addSubjectAlternativeName("victim.com")
        .commonName("victim")
        .build()
    val certificatePinner =

      HeldCertificate.Builder()
        .signedBy(rootCa)
        .serialNumber(2L)
        .commonName(server.hostName)
        .addSubjectAlternativeName(server.hostName)
        .addSubjectAlternativeName("san.com")
        .addSubjectAlternativeName("*.wildcard.com")
        .addSubjectAlternativeName("differentdns.com")
        .build()
    serverIps = Dns.SYSTEM.lookup(server.hostName)
    dns[server.hostName] = serverIps

     * extension will be omitted.
     */
    fun addSubjectAlternativeName(altName: String) =
      apply {
        altNames += altName
      }

    /**
     * Set this certificate's common name (CN). Historically this held the hostname of TLS
     * certificate, but that practice was deprecated by [RFC 2818][rfc_2818] and replaced with
     * [addSubjectAlternativeName]. If unset a random string will be used.
     *

    val certificate =
      HeldCertificate.Builder()
        .certificateAuthority(3)
        .commonName("Jurassic Park")
        .organizationalUnit("Gene Research")
        .addSubjectAlternativeName("*.example.com")
        .addSubjectAlternativeName("www.example.org")
        .validityInterval(-1000L, 2000L)
        .serialNumber(17L)
        .build()

      private val localhostHandshakeCertificatesWithRsa2048: HandshakeCertificates by lazy {
        val heldCertificate =
          HeldCertificate.Builder()
            .commonName("localhost")
            .addSubjectAlternativeName("localhost")
            .rsa2048()
            .build()
        return@lazy HandshakeCertificates.Builder()
          .heldCertificate(heldCertificate)

    val serverCa =
      HeldCertificate.Builder()
        .certificateAuthority(0)
        .build()
    val serverCertificate =
      HeldCertificate.Builder()
        .signedBy(serverCa)
        .addSubjectAlternativeName(server.hostName)
        .build()
    val serverHandshakeCertificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(clientCa.certificate)
        .heldCertificate(serverCertificate)

    val serverCa =
      HeldCertificate.Builder()
        .certificateAuthority(0)
        .build()
    val serverCertificate =
      HeldCertificate.Builder()
        .signedBy(serverCa)
        .addSubjectAlternativeName(server.hostName)
        .build()
    val serverHandshakeCertificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(clientCa.certificate)
        .heldCertificate(serverCertificate)