113 lines
4.0 KiB
Go
113 lines
4.0 KiB
Go
/*
|
|
Copyright 2019 The Jetstack cert-manager contributors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package ca
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/golang/glog"
|
|
corev1 "k8s.io/api/core/v1"
|
|
k8sErrors "k8s.io/apimachinery/pkg/api/errors"
|
|
|
|
"github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1"
|
|
"github.com/jetstack/cert-manager/pkg/issuer"
|
|
"github.com/jetstack/cert-manager/pkg/util/errors"
|
|
"github.com/jetstack/cert-manager/pkg/util/kube"
|
|
"github.com/jetstack/cert-manager/pkg/util/pki"
|
|
)
|
|
|
|
const (
|
|
reasonPending = "Pending"
|
|
reasonErrorPrivateKey = "ErrorPrivateKey"
|
|
reasonErrorCA = "ErrorCA"
|
|
reasonErrorSigning = "ErrorSigning"
|
|
)
|
|
|
|
// Issue will issue a certificate using the CA issuer contained in CA.
|
|
// It uses the 'Ready' status condition to convey the majority of failures, and
|
|
// treats them all as errors to be retried.
|
|
// If there are any failures, they are likely caused by missing or invalid
|
|
// supporting resources, and to ensure we re-attempt issuance when these resources
|
|
// are fixed, it always returns an error on any failure.
|
|
func (c *CA) Issue(ctx context.Context, crt *v1alpha1.Certificate) (*issuer.IssueResponse, error) {
|
|
// get a copy of the existing/currently issued Certificate's private key
|
|
signeeKey, err := kube.SecretTLSKey(c.secretsLister, crt.Namespace, crt.Spec.SecretName)
|
|
if k8sErrors.IsNotFound(err) || errors.IsInvalidData(err) {
|
|
// if one does not already exist, generate a new one
|
|
signeeKey, err = pki.GeneratePrivateKeyForCertificate(crt)
|
|
if err != nil {
|
|
c.Recorder.Eventf(crt, corev1.EventTypeWarning, "PrivateKeyError", "Error generating certificate private key: %v", err)
|
|
// don't trigger a retry. An error from this function implies some
|
|
// invalid input parameters, and retrying without updating the
|
|
// resource will not help.
|
|
return nil, nil
|
|
}
|
|
}
|
|
if err != nil {
|
|
glog.Errorf("Error getting private key %q for certificate: %v", crt.Spec.SecretName, err)
|
|
return nil, err
|
|
}
|
|
|
|
// extract the public component of the key
|
|
signeePublicKey, err := pki.PublicKeyForPrivateKey(signeeKey)
|
|
if err != nil {
|
|
glog.Errorf("Error getting public key from private key: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
// get a copy of the CA certificate named on the Issuer
|
|
caCert, caKey, err := kube.SecretTLSKeyPair(c.secretsLister, c.resourceNamespace, c.issuer.GetSpec().CA.SecretName)
|
|
if err != nil {
|
|
glog.Errorf("Error getting signing CA for Issuer: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
// generate a x509 certificate template for this Certificate
|
|
template, err := pki.GenerateTemplate(c.issuer, crt)
|
|
if err != nil {
|
|
c.Recorder.Eventf(crt, corev1.EventTypeWarning, "ErrorSigning", "Error signing certificate: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
// sign and encode the certificate
|
|
certPem, _, err := pki.SignCertificate(template, caCert, signeePublicKey, caKey)
|
|
if err != nil {
|
|
c.Recorder.Eventf(crt, corev1.EventTypeWarning, "ErrorSigning", "Error signing certificate: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
// Encode output private key and CA cert ready for return
|
|
keyPem, err := pki.EncodePrivateKey(signeeKey)
|
|
if err != nil {
|
|
c.Recorder.Eventf(crt, corev1.EventTypeWarning, "ErrorPrivateKey", "Error encoding private key: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
// encode the CA certificate to be bundled in the output
|
|
caPem, err := pki.EncodeX509(caCert)
|
|
if err != nil {
|
|
c.Recorder.Eventf(crt, corev1.EventTypeWarning, "ErrorSigning", "Error encoding certificate: %v", err)
|
|
return nil, err
|
|
}
|
|
|
|
return &issuer.IssueResponse{
|
|
PrivateKey: keyPem,
|
|
Certificate: certPem,
|
|
CA: caPem,
|
|
}, nil
|
|
}
|