mirror of https://github.com/hashicorp/consul
74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package plugin
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/x509"
|
|
"crypto/x509/pkix"
|
|
"encoding/pem"
|
|
"math/big"
|
|
"time"
|
|
)
|
|
|
|
// generateCert generates a temporary certificate for plugin authentication. The
|
|
// certificate and private key are returns in PEM format.
|
|
func generateCert() (cert []byte, privateKey []byte, err error) {
|
|
key, err := ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
|
sn, err := rand.Int(rand.Reader, serialNumberLimit)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
host := "localhost"
|
|
|
|
template := &x509.Certificate{
|
|
Subject: pkix.Name{
|
|
CommonName: host,
|
|
Organization: []string{"HashiCorp"},
|
|
},
|
|
DNSNames: []string{host},
|
|
ExtKeyUsage: []x509.ExtKeyUsage{
|
|
x509.ExtKeyUsageClientAuth,
|
|
x509.ExtKeyUsageServerAuth,
|
|
},
|
|
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment | x509.KeyUsageKeyAgreement | x509.KeyUsageCertSign,
|
|
BasicConstraintsValid: true,
|
|
SerialNumber: sn,
|
|
NotBefore: time.Now().Add(-30 * time.Second),
|
|
NotAfter: time.Now().Add(262980 * time.Hour),
|
|
IsCA: true,
|
|
}
|
|
|
|
der, err := x509.CreateCertificate(rand.Reader, template, template, key.Public(), key)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
var certOut bytes.Buffer
|
|
if err := pem.Encode(&certOut, &pem.Block{Type: "CERTIFICATE", Bytes: der}); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
keyBytes, err := x509.MarshalECPrivateKey(key)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
var keyOut bytes.Buffer
|
|
if err := pem.Encode(&keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: keyBytes}); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
cert = certOut.Bytes()
|
|
privateKey = keyOut.Bytes()
|
|
|
|
return cert, privateKey, nil
|
|
}
|