Golang cert.NewPrivateKey函数代码示例

func newServerKeyAndCert(s *kubeadmapi.KubeadmConfig, caCert *x509.Certificate, caKey *rsa.PrivateKey, altNames certutil.AltNames) (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unabel to create private key [%v]", err)
	}

	internalAPIServerFQDN := []string{
		"kubernetes",
		"kubernetes.default",
		"kubernetes.default.svc",
		fmt.Sprintf("kubernetes.default.svc.%s", s.InitFlags.Services.DNSDomain),
	}

	internalAPIServerVirtualIP, err := ipallocator.GetIndexedIP(&s.InitFlags.Services.CIDR, 1)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to allocate IP address for the API server from the given CIDR (%q) [%v]", &s.InitFlags.Services.CIDR, err)
	}

	altNames.IPs = append(altNames.IPs, internalAPIServerVirtualIP)
	altNames.DNSNames = append(altNames.DNSNames, internalAPIServerFQDN...)

	config := certutil.Config{
		CommonName: "kube-apiserver",
		AltNames:   altNames,
	}
	cert, err := certutil.NewSignedCert(config, key, caCert, caKey)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to sign certificate [%v]", err)
	}

	return key, cert, nil
}

func newServiceAccountKey() (*rsa.PrivateKey, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, err
	}
	return key, nil
}

func NewClientKeyAndCert(config *certutil.Config, caCert *x509.Certificate, caKey *rsa.PrivateKey) (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unable to create private key [%v]", err)
	}

	cert, err := certutil.NewSignedCert(*config, key, caCert, caKey)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to sign certificate [%v]", err)
	}

	return key, cert, nil
}

func newClientKeyAndCert(caCert *x509.Certificate, caKey *rsa.PrivateKey) (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unable to create private key [%v]", err)
	}

	config := certutil.Config{
		CommonName: "kubernetes-admin",
	}
	cert, err := certutil.NewSignedCert(config, key, caCert, caKey)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to sign certificate [%v]", err)
	}

	return key, cert, nil
}

func newCertificateAuthority() (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unable to create private key [%v]", err)
	}

	config := certutil.Config{
		CommonName: "kubernetes",
	}
	cert, err := certutil.NewSelfSignedCACert(config, key)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to create self-signed certificate [%v]", err)
	}

	return key, cert, nil
}

func newServerKeyAndCert(caCert *x509.Certificate, caKey *rsa.PrivateKey, altNames certutil.AltNames) (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unable to create private key [%v]", err)
	}

	config := certutil.Config{
		CommonName: "kube-apiserver",
		AltNames:   altNames,
	}
	cert, err := certutil.NewSignedCert(config, key, caCert, caKey)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to sign certificate [%v]", err)
	}

	return key, cert, nil
}

func NewClientKeyPair(ca *KeyPair, commonName string) (*KeyPair, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, fmt.Errorf("unable to create a client private key: %v", err)
	}

	config := certutil.Config{
		CommonName: commonName,
	}
	cert, err := certutil.NewSignedCert(config, key, ca.Cert, ca.Key)
	if err != nil {
		return nil, fmt.Errorf("unable to sign the client certificate: %v", err)
	}

	return &KeyPair{
		Key:  key,
		Cert: cert,
	}, nil
}

func NewCA(name string) (*KeyPair, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, fmt.Errorf("unable to create a private key for a new CA: %v", err)
	}

	config := certutil.Config{
		CommonName: name,
	}

	cert, err := certutil.NewSelfSignedCACert(config, key)
	if err != nil {
		return nil, fmt.Errorf("unable to create a self-signed certificate for a new CA: %v", err)
	}

	return &KeyPair{
		Key:  key,
		Cert: cert,
	}, nil
}

func NewServerKeyPair(ca *KeyPair, commonName, svcName, svcNamespace, dnsDomain string, ips, hostnames []string) (*KeyPair, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, fmt.Errorf("unable to create a server private key: %v", err)
	}

	namespacedName := fmt.Sprintf("%s.%s", svcName, svcNamespace)
	internalAPIServerFQDN := []string{
		svcName,
		namespacedName,
		fmt.Sprintf("%s.svc", namespacedName),
		fmt.Sprintf("%s.svc.%s", namespacedName, dnsDomain),
	}

	altNames := certutil.AltNames{}
	for _, ipStr := range ips {
		ip := net.ParseIP(ipStr)
		if ip != nil {
			altNames.IPs = append(altNames.IPs, ip)
		}
	}
	altNames.DNSNames = append(altNames.DNSNames, hostnames...)
	altNames.DNSNames = append(altNames.DNSNames, internalAPIServerFQDN...)

	config := certutil.Config{
		CommonName: commonName,
		AltNames:   altNames,
	}
	cert, err := certutil.NewSignedCert(config, key, ca.Cert, ca.Key)
	if err != nil {
		return nil, fmt.Errorf("unable to sign the server certificate: %v", err)
	}

	return &KeyPair{
		Key:  key,
		Cert: cert,
	}, nil
}

func newServerKeyAndCert(cfg *kubeadmapi.MasterConfiguration, caCert *x509.Certificate, caKey *rsa.PrivateKey, altNames certutil.AltNames) (*rsa.PrivateKey, *x509.Certificate, error) {
	key, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, nil, fmt.Errorf("unabel to create private key [%v]", err)
	}

	internalAPIServerFQDN := []string{
		"kubernetes",
		"kubernetes.default",
		"kubernetes.default.svc",
		fmt.Sprintf("kubernetes.default.svc.%s", cfg.Networking.DNSDomain),
	}

	_, n, err := net.ParseCIDR(cfg.Networking.ServiceSubnet)
	if err != nil {
		return nil, nil, fmt.Errorf("error parsing CIDR %q: %v", cfg.Networking.ServiceSubnet, err)
	}
	internalAPIServerVirtualIP, err := ipallocator.GetIndexedIP(n, 1)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to allocate IP address for the API server from the given CIDR (%q) [%v]", &cfg.Networking.ServiceSubnet, err)
	}

	altNames.IPs = append(altNames.IPs, internalAPIServerVirtualIP)
	altNames.DNSNames = append(altNames.DNSNames, internalAPIServerFQDN...)

	config := certutil.Config{
		CommonName: "kube-apiserver",
		AltNames:   altNames,
	}
	cert, err := certutil.NewSignedCert(config, key, caCert, caKey)
	if err != nil {
		return nil, nil, fmt.Errorf("unable to sign certificate [%v]", err)
	}

	return key, cert, nil
}

// CreatePKIAssets will create and write to disk all PKI assets necessary to establish the control plane.
// It first generates a self-signed CA certificate, a server certificate (signed by the CA) and a key for
// signing service account tokens. It returns CA key and certificate, which is convenient for use with
// client config funcs.
func CreatePKIAssets(cfg *kubeadmapi.MasterConfiguration, pkiPath string) (*x509.Certificate, error) {
	altNames := certutil.AltNames{}

	// First, define all domains this cert should be signed for
	internalAPIServerFQDN := []string{
		"kubernetes",
		"kubernetes.default",
		"kubernetes.default.svc",
		fmt.Sprintf("kubernetes.default.svc.%s", cfg.Networking.DNSDomain),
	}
	hostname, err := os.Hostname()
	if err != nil {
		return nil, fmt.Errorf("couldn't get the hostname: %v", err)
	}
	altNames.DNSNames = append(cfg.API.ExternalDNSNames, hostname)
	altNames.DNSNames = append(altNames.DNSNames, internalAPIServerFQDN...)

	// then, add all IP addresses we're bound to
	for _, a := range cfg.API.AdvertiseAddresses {
		if ip := net.ParseIP(a); ip != nil {
			altNames.IPs = append(altNames.IPs, ip)
		} else {
			return nil, fmt.Errorf("could not parse ip %q", a)
		}
	}
	// and lastly, extract the internal IP address for the API server
	_, n, err := net.ParseCIDR(cfg.Networking.ServiceSubnet)
	if err != nil {
		return nil, fmt.Errorf("error parsing CIDR %q: %v", cfg.Networking.ServiceSubnet, err)
	}
	internalAPIServerVirtualIP, err := ipallocator.GetIndexedIP(n, 1)
	if err != nil {
		return nil, fmt.Errorf("unable to allocate IP address for the API server from the given CIDR (%q) [%v]", &cfg.Networking.ServiceSubnet, err)
	}

	altNames.IPs = append(altNames.IPs, internalAPIServerVirtualIP)

	caKey, caCert, err := newCertificateAuthority()
	if err != nil {
		return nil, fmt.Errorf("failure while creating CA keys and certificate [%v]", err)
	}

	if err := writeKeysAndCert(pkiPath, "ca", caKey, caCert); err != nil {
		return nil, fmt.Errorf("failure while saving CA keys and certificate [%v]", err)
	}
	fmt.Println("[certificates] Generated Certificate Authority key and certificate.")

	apiKey, apiCert, err := newServerKeyAndCert(caCert, caKey, altNames)
	if err != nil {
		return nil, fmt.Errorf("failure while creating API server keys and certificate [%v]", err)
	}

	if err := writeKeysAndCert(pkiPath, "apiserver", apiKey, apiCert); err != nil {
		return nil, fmt.Errorf("failure while saving API server keys and certificate [%v]", err)
	}
	fmt.Println("[certificates] Generated API Server key and certificate")

	// Generate a private key for service accounts
	saKey, err := certutil.NewPrivateKey()
	if err != nil {
		return nil, fmt.Errorf("failure while creating service account signing keys [%v]", err)
	}
	if err := writeKeysAndCert(pkiPath, "sa", saKey, nil); err != nil {
		return nil, fmt.Errorf("failure while saving service account signing keys [%v]", err)
	}
	fmt.Println("[certificates] Generated Service Account signing keys")
	fmt.Printf("[certificates] Created keys and certificates in %q\n", pkiPath)
	return caCert, nil
}