func NewV1beta1TestServer(s V1beta1Service, cert, key, caCert []byte) (*httptest.Server, error) {
	const webhookPath = "/testserver"
	var tlsConfig *tls.Config
	if cert != nil {
		cert, err := tls.X509KeyPair(cert, key)
		if err != nil {
			return nil, err
		}
		tlsConfig = &tls.Config{Certificates: []tls.Certificate{cert}}
	}

	if caCert != nil {
		rootCAs := x509.NewCertPool()

			return nil, fmt.Errorf("failed to load client certificate: %v", err)
		}
		r.CaCert = string(certData)
	}
	if r.InsecureSkipVerify || r.CaCert == "" {
		tlsConfig.InsecureSkipVerify = true
	} else if r.CaCert != "" {
		certPool := x509.NewCertPool()
		if !certPool.AppendCertsFromPEM([]byte(r.CaCert)) {
			return nil, fmt.Errorf("failed to create cert pool")
		}
		tlsConfig.RootCAs = certPool
	}

openssl x509 -req -in server.csr -CA CACert.pem -CAkey CAKey.pem -CAcreateserial -out ServerCert.pem -days 100000 -extensions v3_req -extfile server.conf

# Create a client certiticate
openssl genrsa -out ClientKey.pem 2048
openssl req -new -key ClientKey.pem -out client.csr -subj "/CN=${CN_BASE}_client" -config client.conf

func GetSparseCertTestCases(t *testing.T) []CertTestCase {

	caCert, caKey := CreateCACert(t)
	fpCACert, fpCAKey := CreateCACert(t)
	etcdCACert, etcdCAKey := CreateCACert(t)

	fpCert, fpKey, _ := CreateTestCert(t, fpCACert, fpCAKey, certutil.AltNames{})

	return []CertTestCase{
		{
			Name: "nothing present",
		},
		{
			Name: "CAs already exist",
			Files: PKIFiles{

func NewTestServer(s Service, cert, key, caCert []byte) (*httptest.Server, error) {
	var tlsConfig *tls.Config
	if cert != nil {
		cert, err := tls.X509KeyPair(cert, key)
		if err != nil {
			return nil, err
		}
		tlsConfig = &tls.Config{Certificates: []tls.Certificate{cert}}
	}

	if caCert != nil {
		rootCAs := x509.NewCertPool()
		rootCAs.AppendCertsFromPEM(caCert)
		if tlsConfig == nil {

func NewV1beta1TestServer(s V1beta1Service, cert, key, caCert []byte) (*httptest.Server, error) {
	const webhookPath = "/testserver"
	var tlsConfig *tls.Config
	if cert != nil {
		cert, err := tls.X509KeyPair(cert, key)
		if err != nil {
			return nil, err
		}
		tlsConfig = &tls.Config{Certificates: []tls.Certificate{cert}}
	}

	if caCert != nil {
		rootCAs := x509.NewCertPool()

openssl x509 -req -in server.csr -CA caCert.pem -CAkey caKey.pem -CAcreateserial -out serverCert.pem -days 100000 -extensions v3_req -extfile server.conf

# Create a client certiticate
openssl genrsa -out clientKey.pem 2048
openssl req -new -key clientKey.pem -out client.csr -subj "/CN=webhook_imagepolicy_client" -config client.conf

openssl x509 -req -in server.csr -CA caCert.pem -CAkey caKey.pem -CAcreateserial -out serverCert.pem -days 100000 -extensions v3_req -extfile server.conf

# Create a client certiticate
openssl genrsa -out clientKey.pem 2048
openssl req -new -key clientKey.pem -out client.csr -subj "/CN=webhook_authz_client" -config client.conf

	testCases := []struct {
		desc string
		env  kubeAPIServeETCDEnv
		want []string
	}{
		{
			desc: "mTLS enabled",
			env: kubeAPIServeETCDEnv{
				CAKey:             "CAKey",
				CACert:            "CACert",
				CACertPath:        "CACertPath",
				APIServerKey:      "APIServerKey",
				APIServerCert:     "APIServerCert",
				ETCDKey:           "ETCDKey",
				ETCDCert:          "ETCDCert",

	defer os.RemoveAll(tmpdir)

	// Adds a pki folder with a ca cert to the temp folder
	pkidir := testutil.SetupPkiDirWithCertificateAuthority(t, tmpdir)

	// Retrieves ca cert for assertions
	caCert, _, err := pkiutil.TryLoadCertAndKeyFromDisk(pkidir, kubeadmconstants.CACertAndKeyBaseName)
	if err != nil {
		t.Fatalf("couldn't retrieve ca cert: %v", err)
	}

	var tests = []struct {
		name                   string