chain: Array<out X509Certificate>,
    authType: String?,
  ) = throw CertificateException("Unsupported operation")

  override fun checkClientTrusted(
    chain: Array<out X509Certificate>,
    authType: String,
    engine: SSLEngine?,
  ) = throw CertificateException("Unsupported operation")

  override fun checkClientTrusted(
    chain: Array<out X509Certificate>,
    authType: String,
    socket: Socket?,

      // private TrustAnchor findTrustAnchorByIssuerAndSignature(X509Certificate lastCert);
      val method =
        trustManager.javaClass.getDeclaredMethod(
          "findTrustAnchorByIssuerAndSignature",
          X509Certificate::class.java,
        )
      method.isAccessible = true
      CustomTrustRootIndex(trustManager, method)

 */
package okhttp3.internal.tls

import java.security.cert.X509Certificate
import javax.security.auth.x500.X500Principal

/** A simple index that of trusted root certificates that have been loaded into memory. */
class BasicTrustRootIndex(vararg caCerts: X509Certificate) : TrustRootIndex {
  private val subjectToCaCerts: Map<X500Principal, Set<X509Certificate>>

  init {

        override fun checkClientTrusted(
          chain: Array<X509Certificate>,
          authType: String,
        ) {}

        override fun checkServerTrusted(
          chain: Array<X509Certificate>,
          authType: String,
        ) {}

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

   *     is -1 if signing cert is a lone self-signed certificate.
   */
  private fun verifySignature(
    toVerify: X509Certificate,
    signingCert: X509Certificate,
    minIntermediates: Int,
  ): Boolean {
    if (toVerify.issuerDN != signingCert.subjectDN) {
      return false
    }
    if (signingCert.basicConstraints < minIntermediates) {

    }
  }

  override fun getAcceptedIssuers(): Array<X509Certificate> = delegate.acceptedIssuers

  override fun checkClientTrusted(
    chain: Array<out X509Certificate>,
    authType: String?,
  ) = throw CertificateException("Unsupported operation")

  override fun checkServerTrusted(
    chain: Array<out X509Certificate>,
    authType: String,
  ) = throw CertificateException("Unsupported operation")

 * -----END CERTIFICATE-----
 * ```
 */
fun String.decodeCertificatePem(): X509Certificate {
  try {
    val certificateFactory = CertificateFactory.getInstance("X.509")
    val certificates =
      certificateFactory
        .generateCertificates(
          Buffer().writeUtf8(this).inputStream(),
        )

    return certificates.single() as X509Certificate
  } catch (nsee: NoSuchElementException) {

 * limitations under the License.
 */
package okhttp3.tls.internal

import java.io.InputStream
import java.security.KeyStore
import java.security.cert.Certificate
import java.security.cert.X509Certificate
import javax.net.ssl.KeyManagerFactory
import javax.net.ssl.TrustManagerFactory
import javax.net.ssl.X509ExtendedTrustManager
import javax.net.ssl.X509KeyManager
import javax.net.ssl.X509TrustManager

 * limitations under the License.
 */
package okhttp3

import java.io.IOException
import java.security.Principal
import java.security.cert.Certificate
import java.security.cert.X509Certificate
import javax.net.ssl.SSLPeerUnverifiedException
import javax.net.ssl.SSLSession
import okhttp3.internal.immutableListOf
import okhttp3.internal.toImmutableList

/**

 * limitations under the License.
 */
package okhttp3.internal.tls

import java.security.cert.X509Certificate

fun interface TrustRootIndex {
  /** Returns the trusted CA certificate that signed [cert]. */
  fun findByIssuerAndSignature(cert: X509Certificate): X509Certificate?