func generateCertificate(signer crypto.Signer, gun string, startTime, endTime time.Time) (*x509.Certificate, error) {
template, err := utils.NewCertificate(gun, startTime, endTime)
if err != nil {
return nil, fmt.Errorf("failed to create the certificate template for: %s (%v)", gun, err)
}
derBytes, err := x509.CreateCertificate(rand.Reader, template, template, signer.Public(), signer)
if err != nil {
return nil, fmt.Errorf("failed to create the certificate for: %s (%v)", gun, err)
}
cert, err := x509.ParseCertificate(derBytes)
if err != nil {
return nil, fmt.Errorf("failed to parse the certificate for key: %s (%v)", gun, err)
}
return cert, nil
}
// addECDSAKey adds a key to the yubikey
func addECDSAKey(
ctx IPKCS11Ctx,
session pkcs11.SessionHandle,
privKey data.PrivateKey,
pkcs11KeyID []byte,
passRetriever notary.PassRetriever,
role string,
) error {
logrus.Debugf("Attempting to add key to yubikey with ID: %s", privKey.ID())
err := login(ctx, session, passRetriever, pkcs11.CKU_SO, SOUserPin)
if err != nil {
return err
}
defer ctx.Logout(session)
// Create an ecdsa.PrivateKey out of the private key bytes
ecdsaPrivKey, err := x509.ParseECPrivateKey(privKey.Private())
if err != nil {
return err
}
ecdsaPrivKeyD := ensurePrivateKeySize(ecdsaPrivKey.D.Bytes())
// Hard-coded policy: the generated certificate expires in 10 years.
startTime := time.Now()
template, err := utils.NewCertificate(role, startTime, startTime.AddDate(10, 0, 0))
if err != nil {
return fmt.Errorf("failed to create the certificate template: %v", err)
}
certBytes, err := x509.CreateCertificate(rand.Reader, template, template, ecdsaPrivKey.Public(), ecdsaPrivKey)
if err != nil {
return fmt.Errorf("failed to create the certificate: %v", err)
}
certTemplate := []*pkcs11.Attribute{
pkcs11.NewAttribute(pkcs11.CKA_CLASS, pkcs11.CKO_CERTIFICATE),
pkcs11.NewAttribute(pkcs11.CKA_VALUE, certBytes),
pkcs11.NewAttribute(pkcs11.CKA_ID, pkcs11KeyID),
}
privateKeyTemplate := []*pkcs11.Attribute{
pkcs11.NewAttribute(pkcs11.CKA_CLASS, pkcs11.CKO_PRIVATE_KEY),
pkcs11.NewAttribute(pkcs11.CKA_KEY_TYPE, pkcs11.CKK_ECDSA),
pkcs11.NewAttribute(pkcs11.CKA_ID, pkcs11KeyID),
pkcs11.NewAttribute(pkcs11.CKA_EC_PARAMS, []byte{0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07}),
pkcs11.NewAttribute(pkcs11.CKA_VALUE, ecdsaPrivKeyD),
pkcs11.NewAttribute(pkcs11.CKA_VENDOR_DEFINED, yubikeyKeymode),
}
_, err = ctx.CreateObject(session, certTemplate)
if err != nil {
return fmt.Errorf("error importing: %v", err)
}
_, err = ctx.CreateObject(session, privateKeyTemplate)
if err != nil {
return fmt.Errorf("error importing: %v", err)
}
return nil
}