Vendor main dependencies.

vendor/k8s.io/client-go/1.5/pkg/util/cert/cert.go

@@ -0,0 +1,190 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cert
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	cryptorand "crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"math"
+	"math/big"
+	"net"
+	"time"
+)
+
+const (
+	rsaKeySize   = 2048
+	duration365d = time.Hour * 24 * 365
+)
+
+// Config containes the basic fields required for creating a certificate
+type Config struct {
+	CommonName   string
+	Organization []string
+	AltNames     AltNames
+}
+
+// AltNames contains the domain names and IP addresses that will be added
+// to the API Server's x509 certificate SubAltNames field. The values will
+// be passed directly to the x509.Certificate object.
+type AltNames struct {
+	DNSNames []string
+	IPs      []net.IP
+}
+
+// NewPrivateKey creates an RSA private key
+func NewPrivateKey() (*rsa.PrivateKey, error) {
+	return rsa.GenerateKey(cryptorand.Reader, rsaKeySize)
+}
+
+// NewSelfSignedCACert creates a CA certificate
+func NewSelfSignedCACert(cfg Config, key *rsa.PrivateKey) (*x509.Certificate, error) {
+	now := time.Now()
+	tmpl := x509.Certificate{
+		SerialNumber: new(big.Int).SetInt64(0),
+		Subject: pkix.Name{
+			CommonName:   cfg.CommonName,
+			Organization: cfg.Organization,
+		},
+		NotBefore:             now.UTC(),
+		NotAfter:              now.Add(duration365d * 10).UTC(),
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
+		BasicConstraintsValid: true,
+		IsCA: true,
+	}
+
+	certDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &tmpl, &tmpl, key.Public(), key)
+	if err != nil {
+		return nil, err
+	}
+	return x509.ParseCertificate(certDERBytes)
+}
+
+// NewSignedCert creates a signed certificate using the given CA certificate and key
+func NewSignedCert(cfg Config, key *rsa.PrivateKey, caCert *x509.Certificate, caKey *rsa.PrivateKey) (*x509.Certificate, error) {
+	serial, err := cryptorand.Int(cryptorand.Reader, new(big.Int).SetInt64(math.MaxInt64))
+	if err != nil {
+		return nil, err
+	}
+
+	certTmpl := x509.Certificate{
+		Subject: pkix.Name{
+			CommonName:   cfg.CommonName,
+			Organization: caCert.Subject.Organization,
+		},
+		DNSNames:     cfg.AltNames.DNSNames,
+		IPAddresses:  cfg.AltNames.IPs,
+		SerialNumber: serial,
+		NotBefore:    caCert.NotBefore,
+		NotAfter:     time.Now().Add(duration365d).UTC(),
+		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
+	}
+	certDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &certTmpl, caCert, key.Public(), caKey)
+	if err != nil {
+		return nil, err
+	}
+	return x509.ParseCertificate(certDERBytes)
+}
+
+// MakeEllipticPrivateKeyPEM creates an ECDSA private key
+func MakeEllipticPrivateKeyPEM() ([]byte, error) {
+	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)
+	if err != nil {
+		return nil, err
+	}
+
+	derBytes, err := x509.MarshalECPrivateKey(privateKey)
+	if err != nil {
+		return nil, err
+	}
+
+	privateKeyPemBlock := &pem.Block{
+		Type:  "EC PRIVATE KEY",
+		Bytes: derBytes,
+	}
+	return pem.EncodeToMemory(privateKeyPemBlock), nil
+}
+
+// GenerateSelfSignedCert creates a self-signed certificate and key for the given host.
+// Host may be an IP or a DNS name
+// You may also specify additional subject alt names (either ip or dns names) for the certificate
+// The certificate will be created with file mode 0644. The key will be created with file mode 0600.
+// If the certificate or key files already exist, they will be overwritten.
+// Any parent directories of the certPath or keyPath will be created as needed with file mode 0755.
+func GenerateSelfSignedCert(host, certPath, keyPath string, alternateIPs []net.IP, alternateDNS []string) error {
+	priv, err := rsa.GenerateKey(cryptorand.Reader, 2048)
+	if err != nil {
+		return err
+	}
+
+	template := x509.Certificate{
+		SerialNumber: big.NewInt(1),
+		Subject: pkix.Name{
+			CommonName: fmt.Sprintf("%s@%d", host, time.Now().Unix()),
+		},
+		NotBefore: time.Now(),
+		NotAfter:  time.Now().Add(time.Hour * 24 * 365),
+
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		IsCA: true,
+	}
+
+	if ip := net.ParseIP(host); ip != nil {
+		template.IPAddresses = append(template.IPAddresses, ip)
+	} else {
+		template.DNSNames = append(template.DNSNames, host)
+	}
+
+	template.IPAddresses = append(template.IPAddresses, alternateIPs...)
+	template.DNSNames = append(template.DNSNames, alternateDNS...)
+
+	derBytes, err := x509.CreateCertificate(cryptorand.Reader, &template, &template, &priv.PublicKey, priv)
+	if err != nil {
+		return err
+	}
+
+	// Generate cert
+	certBuffer := bytes.Buffer{}
+	if err := pem.Encode(&certBuffer, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
+		return err
+	}
+
+	// Generate key
+	keyBuffer := bytes.Buffer{}
+	if err := pem.Encode(&keyBuffer, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)}); err != nil {
+		return err
+	}
+
+	if err := WriteCert(certPath, certBuffer.Bytes()); err != nil {
+		return err
+	}
+
+	if err := WriteKey(keyPath, keyBuffer.Bytes()); err != nil {
+		return err
+	}
+
+	return nil
+}