73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
|
package soju
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto"
|
||
|
|
"crypto/ecdsa"
|
||
|
|
"crypto/ed25519"
|
||
|
|
"crypto/elliptic"
|
||
|
|
"crypto/rand"
|
||
|
|
"crypto/rsa"
|
||
|
|
"crypto/x509"
|
||
|
|
"crypto/x509/pkix"
|
||
|
|
"math/big"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
func generateCertFP(keyType string, bits int) (privKeyBytes, certBytes []byte, err error) {
|
||
|
|
var (
|
||
|
|
privKey crypto.PrivateKey
|
||
|
|
pubKey crypto.PublicKey
|
||
|
|
)
|
||
|
|
switch keyType {
|
||
|
|
case "rsa":
|
||
|
|
key, err := rsa.GenerateKey(rand.Reader, bits)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
privKey = key
|
||
|
|
pubKey = key.Public()
|
||
|
|
case "ecdsa":
|
||
|
|
key, err := ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
privKey = key
|
||
|
|
pubKey = key.Public()
|
||
|
|
case "ed25519":
|
||
|
|
var err error
|
||
|
|
pubKey, privKey, err = ed25519.GenerateKey(rand.Reader)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Using PKCS#8 allows easier extension for new key types.
|
||
|
|
privKeyBytes, err = x509.MarshalPKCS8PrivateKey(privKey)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
notBefore := time.Now()
|
||
|
|
// Lets make a fair assumption nobody will use the same cert for more than 20 years...
|
||
|
|
notAfter := notBefore.Add(24 * time.Hour * 365 * 20)
|
||
|
|
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
||
|
|
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
cert := &x509.Certificate{
|
||
|
|
SerialNumber: serialNumber,
|
||
|
|
Subject: pkix.Name{CommonName: "soju auto-generated certificate"},
|
||
|
|
NotBefore: notBefore,
|
||
|
|
NotAfter: notAfter,
|
||
|
|
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
|
||
|
|
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
|
||
|
|
}
|
||
|
|
certBytes, err = x509.CreateCertificate(rand.Reader, cert, cert, pubKey, privKey)
|
||
|
|
if err != nil {
|
||
|
|
return nil, nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return privKeyBytes, certBytes, nil
|
||
|
|
}
|