.serialNumber(2L)
        .certificateAuthority(1)
        .signedBy(root)
        .build()
    val certB =
      HeldCertificate.Builder()
        .serialNumber(3L)
        .certificateAuthority(0)
        .signedBy(certA)
        .build()
    val certC =
      HeldCertificate.Builder()
        .serialNumber(4L)
        .signedBy(certB)
        .build()
    val cleaner = get(root.certificate)

        .certificateAuthority(1)
        .build()
    val clientIntermediate =
      HeldCertificate.Builder()
        .certificateAuthority(0)
        .signedBy(clientRoot)
        .build()
    val clientCertificate =
      HeldCertificate.Builder()
        .signedBy(clientIntermediate)
        .build()
    val serverRoot =
      HeldCertificate.Builder()
        .certificateAuthority(1)
        .build()

    .build();

HeldCertificate intermediateCertificate = new HeldCertificate.Builder()
    .certificateAuthority(0)
    .signedBy(rootCertificate)
    .build();

HeldCertificate serverCertificate = new HeldCertificate.Builder()
    .addSubjectAlternativeName("localhost")
    .signedBy(intermediateCertificate)
    .build();
```

To serve this configuration the server needs to provide its clients with a chain of certificates

      .certificateAuthority(1)
      .build()
  val serverIntermediate =
    HeldCertificate.Builder()
      .certificateAuthority(0)
      .signedBy(serverRoot)
      .build()
  val serverCertificate =
    HeldCertificate.Builder()
      .signedBy(serverIntermediate)
      .build()

  @Test
  fun createFromParts() {
    val handshake =
      Handshake.get(
        tlsVersion = TlsVersion.TLS_1_3,

	public final fun serialNumber (J)Lokhttp3/tls/HeldCertificate$Builder;
	public final fun serialNumber (Ljava/math/BigInteger;)Lokhttp3/tls/HeldCertificate$Builder;
	public final fun signedBy (Lokhttp3/tls/HeldCertificate;)Lokhttp3/tls/HeldCertificate$Builder;
	public final fun validityInterval (JJ)Lokhttp3/tls/HeldCertificate$Builder;
}

public final class okhttp3/tls/HeldCertificate$Builder$Companion {
}

      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)

* A certificate signed by a CA contains information about the issued identity (e.g. name, expiry, public key) and any intermediate certificates. The root CA is not included.

## 3. Generate and use Self-signed Keys and Certificates with MinIO

This section describes how to generate a self-signed certificate using various tools:

* 3.1 [Use certgen to Generate a Certificate](#using-go)

		return "", ErrMissingSignTag
	}
	if signFields[1] == "" {
		return "", ErrMissingFields
	}
	signature := signFields[1]
	return signature, ErrNone
}

// Parse slice of signed headers from signed headers tag.
func parseSignedHeader(signedHdrElement string) ([]string, APIErrorCode) {
	signedHdrFields := strings.Split(strings.TrimSpace(signedHdrElement), "=")
	if len(signedHdrFields) != 2 {

For testing purposes, here is [how to create self-signed certificates](https://github.com/minio/minio/tree/master/docs/tls#3-generate-self-signed-certificates).

## 2. Create Kubernetes secret

[Kubernetes secrets](https://kubernetes.io/docs/concepts/configuration/secret) are intended to hold sensitive information.

	hash.Write(data)
	return hash.Sum(nil)
}

// extractSignedHeaders extract signed headers from Authorization header
func extractSignedHeaders(signedHeaders []string, r *http.Request) (http.Header, APIErrorCode) {
	reqHeaders := r.Header
	reqQueries := r.Form
	// find whether "host" is part of list of signed headers.
	// if not return ErrUnsignedHeaders. "host" is mandatory.