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/*
* ============LICENSE_START=======================================================
* oom-certservice-k8s-external-provider
* ================================================================================
* Copyright (C) 2021 Nokia. All rights reserved.
* ================================================================================
* This source code was copied from the following git repository:
* https://github.com/smallstep/step-issuer
* The source code was modified for usage in the ONAP project.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package util
import (
"context"
"encoding/base64"
"encoding/json"
"strconv"
cmapi "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1"
core "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
revisionAnnotation = "cert-manager.io/certificate-revision"
certificateConfigurationAnnotation = "kubectl.kubernetes.io/last-applied-configuration"
oldCertificateSecretKey = "tls.crt"
oldPrivateKeySecretKey = "tls.key"
)
func CheckIfCertificateUpdateAndRetrieveOldCertificateAndPk(
k8sClient client.Client,
certificateRequest *cmapi.CertificateRequest,
ctx context.Context,
) (bool, string, string) {
if !IsUpdateCertificateRevision(certificateRequest) {
return false, "", ""
}
certificate, privateKey := RetrieveOldCertificateAndPk(k8sClient, certificateRequest, ctx)
areCertAndPkPresent := certificate != "" && privateKey != ""
return areCertAndPkPresent, certificate, privateKey
}
func IsUpdateCertificateRevision(certificateRequest *cmapi.CertificateRequest) bool {
revision, err := strconv.Atoi(certificateRequest.ObjectMeta.Annotations[revisionAnnotation])
if err != nil {
return false
}
return revision > 1
}
func RetrieveOldCertificateAndPk(
k8sClient client.Client,
certificateRequest *cmapi.CertificateRequest,
ctx context.Context,
) (string, string) {
certificateConfigString := certificateRequest.ObjectMeta.Annotations[certificateConfigurationAnnotation]
var certificateConfig cmapi.Certificate
if err := json.Unmarshal([]byte(certificateConfigString), &certificateConfig); err != nil {
return "", ""
}
oldCertificateSecretName := certificateConfig.Spec.SecretName
oldCertificateSecretNamespacedName := types.NamespacedName{
Namespace: certificateConfig.Namespace,
Name: oldCertificateSecretName,
}
var oldCertificateSecret core.Secret
if err := k8sClient.Get(ctx, oldCertificateSecretNamespacedName, &oldCertificateSecret); err != nil {
return "", ""
}
oldCertificateString := base64.StdEncoding.EncodeToString(oldCertificateSecret.Data[oldCertificateSecretKey])
oldPrivateKeyString := base64.StdEncoding.EncodeToString(oldCertificateSecret.Data[oldPrivateKeySecretKey])
return oldCertificateString, oldPrivateKeyString
}
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