// and because it's a common pattern for VMs to have differences between supported and
  // defaulted versions for TLS based on what is requested.
  override fun newSSLContext(): SSLContext = SSLContext.getInstance("TLSv1.3", provider)

  override fun platformTrustManager(): X509TrustManager {
    val factory =
      TrustManagerFactory.getInstance(

  private val provider: Provider = Conscrypt.newProvider()

  // See release notes https://groups.google.com/forum/#!forum/conscrypt
  // for version differences
  override fun newSSLContext(): SSLContext =
    // supports TLSv1.3 by default (version api is >= 1.4.0)
    SSLContext.getInstance("TLS", provider)

  override fun platformTrustManager(): X509TrustManager {
    val trustManagers =

 *
 * Requires org.bouncycastle:bctls-jdk15on on the classpath.
 */
class BouncyCastlePlatform private constructor() : Platform() {
  private val provider: Provider = BouncyCastleJsseProvider()

  override fun newSSLContext(): SSLContext = SSLContext.getInstance("TLS", provider)

  override fun platformTrustManager(): X509TrustManager {
    val factory =
      TrustManagerFactory.getInstance(
        "PKIX",

    // sun.security.ssl to unnamed module @xxx
    throw UnsupportedOperationException(
      "clientBuilder.sslSocketFactory(SSLSocketFactory) not supported on JDK 8 (>= 252) or JDK 9+",
    )
  }

  override fun newSSLContext(): SSLContext {
    return when {
      majorVersion != null && majorVersion >= 9 ->
        SSLContext.getInstance("TLS")
      else ->
        try {

  )
  fun trustManager(): X509TrustManager = trustManager

  fun sslSocketFactory(): SSLSocketFactory = sslContext().socketFactory

  fun sslContext(): SSLContext {
    return Platform.get().newSSLContext().apply {
      init(arrayOf<KeyManager>(keyManager), arrayOf<TrustManager>(trustManager), SecureRandom())
    }
  }

  class Builder {
    private var heldCertificate: HeldCertificate? = null

        override fun getAcceptedIssuers(): Array<X509Certificate> = arrayOf()
      }

    private fun createInsecureSslSocketFactory(trustManager: TrustManager): SSLSocketFactory =
      Platform.get().newSSLContext().apply {
        init(null, arrayOf(trustManager), null)
      }.socketFactory

    private fun createInsecureHostnameVerifier(): HostnameVerifier = HostnameVerifier { _, _ -> true }
  }