generate and sign RSA certificates with given CA see: https://fale.io/blog/2017/06/05/create-a-pki-in-golang/
(caPem, caKey []byte)
| 49 | // generate and sign RSA certificates with given CA |
| 50 | // see: https://fale.io/blog/2017/06/05/create-a-pki-in-golang/ |
| 51 | func generateAndSignRSACerts(caPem, caKey []byte) ([]byte, []byte) { |
| 52 | // Load CA |
| 53 | catls, err := tls.X509KeyPair(caPem, caKey) |
| 54 | if err != nil { |
| 55 | panic(err) |
| 56 | } |
| 57 | ca, err := x509.ParseCertificate(catls.Certificate[0]) |
| 58 | if err != nil { |
| 59 | panic(err) |
| 60 | } |
| 61 | |
| 62 | // use the CA to sign certificates |
| 63 | serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128) |
| 64 | serialNumber, err := rand.Int(rand.Reader, serialNumberLimit) |
| 65 | if err != nil { |
| 66 | panic(err) |
| 67 | } |
| 68 | cert := &x509.Certificate{ |
| 69 | SerialNumber: serialNumber, |
| 70 | Subject: pkix.Name{ |
| 71 | Organization: []string{"ORGANIZATION_NAME"}, |
| 72 | Country: []string{"COUNTRY_CODE"}, |
| 73 | Province: []string{"PROVINCE"}, |
| 74 | Locality: []string{"CITY"}, |
| 75 | StreetAddress: []string{"ADDRESS"}, |
| 76 | PostalCode: []string{"POSTAL_CODE"}, |
| 77 | }, |
| 78 | NotBefore: time.Now(), |
| 79 | NotAfter: time.Now().AddDate(10, 0, 0), |
| 80 | SubjectKeyId: []byte{1, 2, 3, 4, 6}, |
| 81 | ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth}, |
| 82 | KeyUsage: x509.KeyUsageDigitalSignature, |
| 83 | } |
| 84 | priv, _ := rsa.GenerateKey(rand.Reader, 2048) |
| 85 | |
| 86 | // sign the certificate |
| 87 | cert_b, err := x509.CreateCertificate(rand.Reader, ca, cert, &priv.PublicKey, catls.PrivateKey) |
| 88 | if err != nil { |
| 89 | panic(err) |
| 90 | } |
| 91 | certPem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: cert_b}) |
| 92 | keyPem := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(priv)}) |
| 93 | |
| 94 | return certPem, keyPem |
| 95 | } |
| 96 | |
| 97 | // generate CA in PEM |
| 98 | // see: https://github.com/golang/go/blob/master/src/crypto/tls/generate_cert.go |