} else {
			for i, ca := range secret.CertChain {
				t := "Intermediate"
				if i == 0 {
					t = "Leaf"
				} else if i == len(secret.CertChain)-1 {
					t = "Root"
				}
				n := new(big.Int)
				n, _ = n.SetString(ca.SerialNumber, 10)
				fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%x\t%v\t%v\n",
					secret.Identity, t, secret.State, certNotExpired(ca), n, valueOrNA(ca.ExpirationTime), valueOrNA(ca.ValidFrom))
			}

	"istio.io/istio/istioctl/pkg/cli"
	"istio.io/istio/pilot/test/util"
	"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/test/util/assert"
)

var fakeCACert = []byte("fake-CA-cert")

var (
	defaultYAML = `apiVersion: networking.istio.io/v1alpha3
kind: WorkloadGroup
metadata:
  name: foo
  namespace: bar
spec:
  metadata: {}
  template:
    serviceAccount: default
`

func (c *ConfigWriter) PrintVersionSummary() error {
	// TODO
	return nil
}

// PrintPodRootCAFromDynamicSecretDump prints just pod's root ca from dynamic secret config dump to the ConfigWriter stdout
func (c *ConfigWriter) PrintPodRootCAFromDynamicSecretDump() (string, error) {
	// TODO
	return "", nil
}

func (c *ConfigWriter) tabwriter() *tabwriter.Writer {

		"ISTIO_SERVICE_CIDR":        "*",
		"ISTIO_LOCAL_EXCLUDE_PORTS": excludePorts,
		"SERVICE_ACCOUNT":           we.ServiceAccount,
	}

	if isRevisioned(revision) {
		overrides["CA_ADDR"] = IstiodAddr(istioNamespace, revision)
	}
	if len(internalIP) > 0 {
		overrides["ISTIO_SVC_IP"] = internalIP
	} else if len(externalIP) > 0 {
		overrides["ISTIO_SVC_IP"] = externalIP

	registerIntegerParameter(constants.KubeconfigMode, constants.DefaultKubeconfigMode, "File mode of the kubeconfig file")
	registerStringParameter(constants.KubeCAFile, "", "CA file for kubeconfig. Defaults to the same as install-cni pod")
	registerBooleanParameter(constants.SkipTLSVerify, false, "Whether to use insecure TLS in kubeconfig file")

	// healthCheck readiness deadlines and cors settings.
	globalAPIConfig = apiConfig{listQuorum: "strict", rootAccess: true}

	globalStorageClass storageclass.Config

	globalAuthNPlugin *idplugin.AuthNPlugin

	// CA root certificates, a nil value means system certs pool will be used
	globalRootCAs *x509.CertPool

	// IsSSL indicates if the server is configured with SSL.
	globalIsTLS bool

	globalTLSCerts *certs.Manager

	// a single client certificate. Otherwise, the certificate to
	// policy mapping would be ambiguous.
	// However, we can filter all CA certificates and only check
	// whether they client has sent exactly one (non-CA) leaf certificate.
	peerCertificates := make([]*x509.Certificate, 0, len(r.TLS.PeerCertificates))
	for _, cert := range r.TLS.PeerCertificates {
		if cert.IsCA {
			continue
		}

	}

	globalCertsCADir = &ConfigDir{path: filepath.Join(globalCertsDir.Get(), certsCADir)}

	logger.FatalIf(mkdirAllIgnorePerm(globalCertsCADir.Get()), "Unable to create certs CA directory at %s", globalCertsCADir.Get())
}

func runDNSCache(ctx *cli.Context) {
	dnsTTL := ctx.Duration("dns-cache-ttl")
	// Check if we have configured a custom DNS cache TTL.
	if dnsTTL <= 0 {

	EnvKESClientCert       = "MINIO_KMS_KES_CERT_FILE"      // Path to TLS certificate for authenticating to KES with mTLS - usually prefer API keys
	EnvKESServerCA         = "MINIO_KMS_KES_CAPATH"         // Path to file/directory containing CA certificates to verify the KES server certificate
	EnvKESKeyCacheInterval = "MINIO_KMS_KEY_CACHE_INTERVAL" // Period between polls of the KES KMS Master Key cache, to prevent it from being unused and purged

	return testServer
}

// testServerCertPEM and testServerKeyPEM are generated by
//  https://golang.org/src/crypto/tls/generate_cert.go
//    $ go run generate_cert.go -ca --host 127.0.0.1
// The generated certificate contains IP SAN, that way we don't need
// to enable InsecureSkipVerify in TLS config

// Starts the test server and returns the TestServer with TLS configured instance.