_, certErr := os.Stat(certificatePath)
	_, keyErr := os.Stat(privateKeyPath)

	return !(os.IsNotExist(certErr) && os.IsNotExist(keyErr))
}

// CSROrKeyExist returns true if one of the CSR or key exists
func CSROrKeyExist(csrDir, name string) bool {
	csrPath := pathForCSR(csrDir, name)
	keyPath := pathForKey(csrDir, name)

	_, csrErr := os.Stat(csrPath)
	_, keyErr := os.Stat(keyPath)

	}
	if cert == nil {
		return errors.Errorf("%s: cert was nil", errInvalid)
	}
	certDir := kubeadmConfig.CertificatesDir
	name := cert.BaseName
	if pkiutil.CSROrKeyExist(certDir, name) {
		return errors.Errorf("%s: key or CSR %s/%s", errExist, certDir, name)
	}
	cfg, err := cert.GetConfig(kubeadmConfig)
	if err != nil {
		return err
	}

		return errors.Errorf("%s: kube config: %s", errExist, kubeConfigPath)
	} else if !os.IsNotExist(err) {
		return errors.Wrapf(err, "unexpected error while checking if file exists: %s", kubeConfigPath)
	}
	if pkiutil.CSROrKeyExist(kubeConfigDir, name) {
		return errors.Errorf("%s: csr: %s", errExist, kubeConfigPath)
	}

	clientCertConfig := newClientCertConfigFromKubeConfigSpec(spec)