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setup.go
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setup.go
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package acme
import (
"context"
"crypto/rsa"
"fmt"
"strings"
"github.com/golang/glog"
"k8s.io/api/core/v1"
k8sErrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1"
"github.com/jetstack/cert-manager/pkg/issuer/acme/client"
"github.com/jetstack/cert-manager/pkg/util/errors"
"github.com/jetstack/cert-manager/pkg/util/pki"
"github.com/jetstack/cert-manager/third_party/crypto/acme"
)
const (
errorAccountRegistrationFailed = "ErrRegisterACMEAccount"
errorAccountVerificationFailed = "ErrVerifyACMEAccount"
successAccountRegistered = "ACMEAccountRegistered"
successAccountVerified = "ACMEAccountVerified"
messageAccountRegistrationFailed = "Failed to register ACME account: "
messageAccountVerificationFailed = "Failed to verify ACME account: "
messageAccountRegistered = "The ACME account was registered with the ACME server"
messageAccountVerified = "The ACME account was verified with the ACME server"
)
// Setup will verify an existing ACME registration, or create one if not
// already registered.
func (a *Acme) Setup(ctx context.Context) error {
cl, err := a.acmeClient()
if k8sErrors.IsNotFound(err) || errors.IsInvalidData(err) {
glog.Infof("%s: generating acme account private key %q", a.issuer.GetObjectMeta().Name, a.issuer.GetSpec().ACME.PrivateKey.Name)
accountPrivKey, err := a.createAccountPrivateKey()
if err != nil {
s := messageAccountRegistrationFailed + err.Error()
a.issuer.UpdateStatusCondition(v1alpha1.IssuerConditionReady, v1alpha1.ConditionFalse, errorAccountRegistrationFailed, s)
return fmt.Errorf(s)
}
a.issuer.GetStatus().ACMEStatus().URI = ""
cl = a.acmeClientWithKey(accountPrivKey)
} else if err != nil {
s := messageAccountVerificationFailed + err.Error()
glog.V(4).Infof("%s: %s", a.issuer.GetObjectMeta().Name, s)
a.recorder.Event(a.issuer, v1.EventTypeWarning, errorAccountVerificationFailed, s)
return err
}
// registerAccount will also verify the account exists if it already
// exists.
account, err := a.registerAccount(ctx, cl)
if err != nil {
s := messageAccountVerificationFailed + err.Error()
glog.V(4).Infof("%s: %s", a.issuer.GetObjectMeta().Name, s)
a.recorder.Event(a.issuer, v1.EventTypeWarning, errorAccountVerificationFailed, s)
a.issuer.UpdateStatusCondition(v1alpha1.IssuerConditionReady, v1alpha1.ConditionFalse, errorAccountRegistrationFailed, s)
return err
}
glog.Infof("%s: verified existing registration with ACME server", a.issuer.GetObjectMeta().Name)
a.issuer.UpdateStatusCondition(v1alpha1.IssuerConditionReady, v1alpha1.ConditionTrue, successAccountRegistered, messageAccountRegistered)
a.issuer.GetStatus().ACMEStatus().URI = account.URL
return nil
}
// registerAccount will register a new ACME account with the server. If an
// account with the clients private key already exists, it will attempt to look
// up and verify the corresponding account, and will return that. If this fails
// due to a not found error it will register a new account with the given key.
func (a *Acme) registerAccount(ctx context.Context, cl client.Interface) (*acme.Account, error) {
// check if the account already exists
acc, err := cl.GetAccount(ctx)
if err == nil {
return acc, nil
}
// return all errors except for 404 errors (which indicate the account
// is not yet registered)
acmeErr, ok := err.(*acme.Error)
if !ok || (acmeErr.StatusCode != 400 && acmeErr.StatusCode != 404) {
return nil, err
}
acc = &acme.Account{
Contact: []string{fmt.Sprintf("mailto:%s", strings.ToLower(a.issuer.GetSpec().ACME.Email))},
TermsAgreed: true,
}
acc, err = cl.CreateAccount(ctx, acc)
if err != nil {
return nil, err
}
// TODO: re-enable this check once this field is set by Pebble
// if acc.Status != acme.StatusValid {
// return nil, fmt.Errorf("acme account is not valid")
// }
return acc, nil
}
func (a *Acme) createAccountPrivateKey() (*rsa.PrivateKey, error) {
secretName, secretKey := a.acmeAccountPrivateKeyMeta()
accountPrivKey, err := pki.GenerateRSAPrivateKey(2048)
if err != nil {
return nil, err
}
_, err = a.client.CoreV1().Secrets(a.issuerResourcesNamespace).Create(&v1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: secretName,
Namespace: a.issuerResourcesNamespace,
},
Data: map[string][]byte{
secretKey: pki.EncodePKCS1PrivateKey(accountPrivKey),
},
})
if err != nil {
return nil, err
}
return accountPrivKey, err
}