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certificates.go
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certificates.go
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package certificates
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"math/big"
"net"
"time"
)
func NewCA() (*rsa.PrivateKey, []byte, error) {
ca := &x509.Certificate{
SerialNumber: big.NewInt(2019),
Subject: pkix.Name{
Organization: []string{"Cockroach"},
CommonName: "Cockroach CA",
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
IsCA: true,
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
}
caPrivKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, nil, err
}
caBytes, err := x509.CreateCertificate(rand.Reader, ca, ca, &caPrivKey.PublicKey, caPrivKey)
if err != nil {
return nil, nil, err
}
return caPrivKey, caBytes, nil
}
func NewClient(caPrivKey *rsa.PrivateKey, ca []byte, user string) (*rsa.PrivateKey, []byte, error) {
cert := &x509.Certificate{
SerialNumber: big.NewInt(1658),
Subject: pkix.Name{
Organization: []string{"Cockroach"},
CommonName: user,
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
}
certPrivKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, nil, err
}
caCert, err := x509.ParseCertificate(ca)
if err != nil {
return nil, nil, err
}
certBytes, err := x509.CreateCertificate(rand.Reader, cert, caCert, &certPrivKey.PublicKey, caPrivKey)
if err != nil {
return nil, nil, err
}
return certPrivKey, certBytes, nil
}
func NewNode(caPrivKey *rsa.PrivateKey, ca []byte, namespace string, clusterDns string) (*rsa.PrivateKey, []byte, error) {
cert := &x509.Certificate{
SerialNumber: big.NewInt(1658),
Subject: pkix.Name{
Organization: []string{"Cockroach"},
CommonName: "node",
},
IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1)},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
DNSNames: []string{
"localhost",
"cockroachdb-public",
"cockroachdb-public.default",
"cockroachdb-public." + namespace,
"cockroachdb-public." + namespace + ".svc." + clusterDns,
"*.cockroachdb",
"*.cockroachdb." + namespace,
"*.cockroachdb." + namespace + ".svc." + clusterDns,
},
}
certPrivKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, nil, err
}
caCert, err := x509.ParseCertificate(ca)
if err != nil {
return nil, nil, err
}
certBytes, err := x509.CreateCertificate(rand.Reader, cert, caCert, &certPrivKey.PublicKey, caPrivKey)
if err != nil {
return nil, nil, err
}
return certPrivKey, certBytes, nil
}