selfSigned.certificate,
        trusted.certificate,
      )
    assertThat(cleaner.clean(list(certB, certA), "hostname")).isEqualTo(
      list(certB, certA, trusted, selfSigned),
    )
    assertThat(cleaner.clean(list(certB, certA, trusted), "hostname")).isEqualTo(
      list(certB, certA, trusted, selfSigned),
    )
    assertThat(cleaner.clean(list(certB, certA, trusted, selfSigned), "hostname"))
      .isEqualTo(

    /**
     * Configure the certificate chain to use when being authenticated. The first certificate is
     * the held certificate, further certificates are included in the handshake so the peer can
     * build a trusted path to a trusted root certificate.
     *
     * The chain should include all intermediate certificates but does not need the root certificate
     * that we expect to be known by the remote peer. The peer already has that certificate so

      val toVerify = result[result.size - 1] as X509Certificate

      // If this cert has been signed by a trusted cert, use that. Add the trusted certificate to
      // the end of the chain unless it's already present. (That would happen if the first
      // certificate in the chain is itself a self-signed and trusted CA certificate.)
      val trustedCert = trustRootIndex.findByIssuerAndSignature(toVerify)
      if (trustedCert != null) {

-----------------------

The above example uses a self-signed certificate. This is convenient for testing but not
representative of real-world HTTPS deployment. To get closer to that we can use `HeldCertificate`
to generate a trusted root certificate, an intermediate certificate, and a server certificate.
We use `certificateAuthority(int)` to create certificates that can sign other certificates. The

{{/*
Formats volumeMount for MinIO TLS keys and trusted certs
*/}}
{{- define "minio.tlsKeysVolumeMount" -}}
{{- if .Values.tls.enabled }}
- name: cert-secret-volume
  mountPath: {{ .Values.certsPath }}
{{- end }}
{{- if or .Values.tls.enabled (ne .Values.trustedCertsSecret "") }}
{{- $casPath := printf "%s/CAs" .Values.certsPath | clean }}
- name: trusted-cert-secret-volume
  mountPath: {{ $casPath }}
{{- end }}

 * certificate is signed by the certificate that follows, and the last certificate is a trusted CA
 * certificate.
 *
 * Use of the chain cleaner is necessary to omit unexpected certificates that aren't relevant to
 * the TLS handshake and to extract the trusted CA certificate for the benefit of certificate
 * pinning.
 */
abstract class CertificateChainCleaner {

******@****.***
******@****.***
hmac-sha2-256
hmac-sha2-512
hmac-sha1
hmac-sha1-96
```

### Certificate-based authentication

`--sftp=trusted-user-ca-key=...` specifies a file containing public key of certificate authority that is trusted
to sign user certificates for authentication.

Implementation is identical with "TrustedUserCAKeys" setting in OpenSSH server with exception that only one CA

 * 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?

 * limitations under the License.
 */
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 {

import okhttp3.CertificatePinner;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public final class CheckHandshake {
  /** Rejects otherwise-trusted certificates. */
  private static final Interceptor CHECK_HANDSHAKE_INTERCEPTOR = new Interceptor() {
    final Set<String> denylist = Collections.singleton(
        "sha256/afwiKY3RxoMmLkuRW1l7QsPZTJPwDS2pdDROQjXw8ig=");