mirror of
https://github.com/ceph/ceph-csi.git
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82 lines
2.4 KiB
Go
82 lines
2.4 KiB
Go
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/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package policy
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import (
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"fmt"
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"sort"
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"strings"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/pod-security-admission/api"
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)
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/*
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On supported hosts, the 'runtime/default' AppArmor profile is applied by default.
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The baseline policy should prevent overriding or disabling the default AppArmor
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profile, or restrict overrides to an allowed set of profiles.
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**Restricted Fields:**
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metadata.annotations['container.apparmor.security.beta.kubernetes.io/*']
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**Allowed Values:** 'runtime/default', 'localhost/*', empty, undefined
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*/
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func init() {
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addCheck(CheckAppArmorProfile)
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}
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// CheckAppArmorProfile returns a baseline level check
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// that limits the value of AppArmor profiles in 1.0+
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func CheckAppArmorProfile() Check {
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return Check{
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ID: "appArmorProfile",
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Level: api.LevelBaseline,
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Versions: []VersionedCheck{
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{
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MinimumVersion: api.MajorMinorVersion(1, 0),
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CheckPod: appArmorProfile_1_0,
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},
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},
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}
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}
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func allowedProfile(profile string) bool {
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return len(profile) == 0 ||
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profile == corev1.AppArmorBetaProfileRuntimeDefault ||
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strings.HasPrefix(profile, corev1.AppArmorBetaProfileNamePrefix)
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}
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func appArmorProfile_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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var forbiddenValues []string
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for k, v := range podMetadata.Annotations {
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if strings.HasPrefix(k, corev1.AppArmorBetaContainerAnnotationKeyPrefix) && !allowedProfile(v) {
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forbiddenValues = append(forbiddenValues, fmt.Sprintf("%s=%q", k, v))
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}
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}
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if len(forbiddenValues) > 0 {
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sort.Strings(forbiddenValues)
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return CheckResult{
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Allowed: false,
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ForbiddenReason: pluralize("forbidden AppArmor profile", "forbidden AppArmor profiles", len(forbiddenValues)),
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ForbiddenDetail: strings.Join(forbiddenValues, ", "),
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}
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}
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return CheckResult{Allowed: true}
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}
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