/
utils.go
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/
utils.go
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// This file may have been modified by vArmor Authors. ("vArmor Modifications").
// All vArmor Modifications are Copyright 2022 vArmor Authors.
//
// Copyright 2021 Kyverno Authors
//
// 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 tls
import (
"context"
"fmt"
"net/url"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/rest"
"github.com/bytedance/vArmor/internal/config"
)
const ErrorsNotFound = "root CA certificate not found"
func GenerateRootCASecretName(props CertificateProps) string {
return props.Service + "." + props.Namespace + ".varmor-tls-ca"
}
func GenerateTLSPairSecretName(props CertificateProps) string {
return props.Service + "." + props.Namespace + ".varmor-tls-pair"
}
// GenerateInClusterServiceName The generated service name should be the common name for TLS certificate.
func GenerateInClusterServiceName(props CertificateProps) string {
return props.Service + "." + props.Namespace + ".svc"
}
// GetTLSCertProps provides the TLS Certificate Properties.
func GetTLSCertProps(configuration *rest.Config) (certProps CertificateProps, err error) {
apiServerURL, err := url.Parse(configuration.Host)
if err != nil {
return certProps, err
}
certProps = CertificateProps{
Service: config.WebhookServiceName,
Namespace: config.Namespace,
APIServerHost: apiServerURL.Hostname(),
}
return certProps, nil
}
// ReadRootCASecret returns the RootCA from the pre-defined secret.
func ReadRootCASecret(secretInterface corev1.SecretInterface, secretName string) (result []byte, err error) {
tlsCA, err := secretInterface.Get(context.Background(), secretName, metav1.GetOptions{})
if err != nil {
return nil, err
}
result = tlsCA.Data[RootCAKey]
if len(result) == 0 {
return nil, fmt.Errorf("root CA secret format error")
}
return result, nil
}
// ReadTLSPair returns the pem pair from the pre-defined secret.
func ReadTLSPair(secretInterface corev1.SecretInterface, secretName string) (*PemPair, error) {
tlsPair, err := secretInterface.Get(context.Background(), secretName, metav1.GetOptions{})
if err != nil {
return nil, err
}
pemPair := PemPair{
Certificate: tlsPair.Data[v1.TLSCertKey],
PrivateKey: tlsPair.Data[v1.TLSPrivateKeyKey],
}
if len(pemPair.Certificate) == 0 {
return nil, fmt.Errorf("TLS Certificate not found in secret %s", secretName)
}
if len(pemPair.PrivateKey) == 0 {
return nil, fmt.Errorf("TLS PrivateKey not found in secret %s", secretName)
}
return &pemPair, nil
}
func IsVarmorManagerInRollingUpdate(deploy *appsv1.Deployment) bool {
return deploy.Status.Replicas > *deploy.Spec.Replicas
}