# (Optional) Server IP address
ip_address = "127.0.0.1"

# Whether this certificate will be used for a TLS server
tls_www_server
```

Run `certtool.exe` and specify the configuration file to generate a certificate:

```
certtool.exe --generate-self-signed --load-privkey private.key --template cert.cnf --outfile public.crt
```

## 4. Install Certificates from Third-party CAs

	getCert func() (*Certificate, error)
}

// NewCertPool returns a new, empty CertPool.
func NewCertPool() *CertPool {
	return &CertPool{
		byName:  make(map[string][]int),
		haveSum: make(map[sum224]bool),
	}
}

// len returns the number of certs in the set.
// A nil set is a valid empty set.
func (s *CertPool) len() int {
	if s == nil {
		return 0
	}
	return len(s.lazyCerts)
}

}

func getRootCertificate(rootCertFile string) (*x509.CertPool, error) {
	var certPool *x509.CertPool
	var rootCert []byte
	var err error

	if rootCertFile != "" {
		rootCert, err = os.ReadFile(rootCertFile)
		if err != nil {
			return nil, err
		}

		certPool = x509.NewCertPool()
		ok := certPool.AppendCertsFromPEM(rootCert)
		if !ok {

		if err != nil {
			return nil, err
		}

		var certPool *x509.CertPool
		certPool, err = x509.SystemCertPool()
		if err != nil {
			return nil, fmt.Errorf("failed to fetch Cert from SystemCertPool: %v", err)
		}

		if tlsSettings.RootCert != "" && !certPool.AppendCertsFromPEM([]byte(tlsSettings.RootCert)) {
			return nil, fmt.Errorf("failed to create cert pool")
		}

// See go.dev/issue/67401.
//
//go:linkname systemRoots
var (
	once           sync.Once
	systemRootsMu  sync.RWMutex
	systemRoots    *CertPool
	systemRootsErr error
	fallbacksSet   bool
)

func systemRootsPool() *CertPool {
	once.Do(initSystemRoots)
	systemRootsMu.RLock()
	defer systemRootsMu.RUnlock()
	return systemRoots
}

func initSystemRoots() {
	systemRootsMu.Lock()

	return func(args *OperatorDNS) {
		args.username = username
		args.password = password
	}
}

// RootCAs - add custom trust certs pool
func RootCAs(certPool *x509.CertPool) OperatorOption {
	return func(args *OperatorDNS) {
		args.rootCAs = certPool
	}
}

// NewOperatorDNS - initialize a new K8S Operator DNS set/unset values.
func NewOperatorDNS(endpoint string, setters ...OperatorOption) (Store, error) {

	}

	pemBytes, err := os.ReadFile(certFile)
	if err != nil {
		return nil, err
	}

	certpool := x509.NewCertPool()
	if !certpool.AppendCertsFromPEM(pemBytes) {
		return nil, fmt.Errorf("no certificates found in %s", certFile)
	}
	client.Transport.(*http.Transport).TLSClientConfig = &tls.Config{
		RootCAs: certpool,
	}

	return client, nil

func newCitadelClient(endpoint string, rootCert []byte) (pb.IstioCertificateServiceClient, error) {
	certPool := x509.NewCertPool()
	ok := certPool.AppendCertsFromPEM(rootCert)
	if !ok {
		return nil, fmt.Errorf("failed to append certificates")
	}
	config := tls.Config{
		RootCAs:            certPool,
		InsecureSkipVerify: true, // nolint: gosec // test only code
	}
	transportCreds := credentials.NewTLS(&config)

	data, err := macOS.SecCertificateCopyData(cert)
	if err != nil {
		return nil, err
	}
	return ParseCertificate(data)
}

func loadSystemRoots() (*CertPool, error) {
	return &CertPool{systemPool: true}, nil

	"errors"
	"strings"
	"syscall"
	"unsafe"
)

func loadSystemRoots() (*CertPool, error) {
	return &CertPool{systemPool: true}, nil
}

// Creates a new *syscall.CertContext representing the leaf certificate in an in-memory
// certificate store containing itself and all of the intermediate certificates specified
// in the opts.Intermediates CertPool.
//