)
    factory.init(null as KeyStore?)
    val trustManagers = factory.trustManagers!!
    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }
    return trustManagers[0] as X509TrustManager
  }

  open fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {
    return try {

    NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted(hostname)

  override fun buildCertificateChainCleaner(trustManager: X509TrustManager): CertificateChainCleaner =
    AndroidCertificateChainCleaner.buildIfSupported(trustManager) ?: super.buildCertificateChainCleaner(trustManager)

  override fun log(
    message: String,
    level: Int,
    t: Throwable?,
  ) {
    if (level == WARN) {

  override fun platformTrustManager(): X509TrustManager {
    val trustManagers =
      TrustManagerFactory
        .getInstance(TrustManagerFactory.getDefaultAlgorithm())
        .apply {
          init(null as KeyStore?)
        }.trustManagers!!
    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }

) : AndroidSocketAdapter(sslSocketClass) {
  override fun matchesSocketFactory(sslSocketFactory: SSLSocketFactory): Boolean = sslSocketFactoryClass.isInstance(sslSocketFactory)

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {
    val context: Any? =
      readFieldOrNull(
        sslSocketFactory,
        paramClass,
        "sslParameters",
      )
    val x509TrustManager =

        )
      val trustManager =
        newTrustManager(
          null,
          Arrays.asList(serverRootCa.certificate, clientRootCa.certificate),
          emptyList(),
        )
      val sslContext = SSLContext.getInstance("TLS")
      sslContext.init(
        arrayOf<KeyManager>(keyManager),
        arrayOf<TrustManager>(trustManager),
        SecureRandom(),
      )

                if ("all".equals(trustManager)) {
                    ftpsClient.setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());
                } else if ("valid".equals(trustManager)) {
                    ftpsClient.setTrustManager(TrustManagerUtils.getValidateServerCertificateTrustManager());
                } else if ("none".equals(trustManager)) {
                    ftpsClient.setTrustManager(null);

        override fun connectFailed(
          uri: URI,
          socketAddress: SocketAddress,
          e: IOException,
        ) {}
      }

    val trustManager = get().platformTrustManager()
    val sslContext = get().newSSLContext()
    sslContext.init(null, null, null)

    // new client, may share all same fields but likely different connection pool
    assertNotSame(

     * TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
     * if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
     *     throw new IllegalStateException("Unexpected default trust managers:"
     *         + Arrays.toString(trustManagers));
     * }
     * X509TrustManager trustManager = (X509TrustManager) trustManagers[0];
     *

    val x509KeyManager = newKeyManager(keystoreType, heldCertificate, *intermediates)
    val trustManager =
      newTrustManager(
        keystoreType,
        emptyList(),
        emptyList(),
      )
    val sslContext = get().newSSLContext()
    sslContext.init(
      arrayOf<KeyManager>(x509KeyManager),
      arrayOf<TrustManager>(trustManager),
      SecureRandom(),
    )
    return sslContext.socketFactory
  }

        provider,
      )
    factory.init(null as KeyStore?)
    val trustManagers = factory.trustManagers!!
    check(trustManagers.size == 1 && trustManagers[0] is X509TrustManager) {
      "Unexpected default trust managers: ${trustManagers.contentToString()}"
    }
    return trustManagers[0] as X509TrustManager
  }

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager =