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PodSecurity: seccompProfile_baseline: cleanup
Make messages consistent Add unit tests for messages Consolidate integration test fixtures Rename to seccompProfile_baseline
This commit is contained in:
Jordan Liggitt
parent
2af08d1a5a
commit
bebf612967
@ -0,0 +1,172 @@
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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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"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/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/pod-security-admission/api"
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)
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/*
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If seccomp profiles are specified, only runtime default and localhost profiles are allowed.
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v1.0 - v1.18:
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**Restricted Fields:**
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metadata.annotations['seccomp.security.alpha.kubernetes.io/pod']
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metadata.annotations['container.seccomp.security.alpha.kubernetes.io/*']
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**Allowed Values:** 'runtime/default', 'docker/default', 'localhost/*', undefined
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v1.19+:
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**Restricted Fields:**
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spec.securityContext.seccompProfile.type
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spec.containers[*].securityContext.seccompProfile.type
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spec.initContainers[*].securityContext.seccompProfile.type
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**Allowed Values:** 'RuntimeDefault', 'Localhost', undefined
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*/
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const (
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annotationKeyPod = "seccomp.security.alpha.kubernetes.io/pod"
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annotationKeyContainerPrefix = "container.seccomp.security.alpha.kubernetes.io/"
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)
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func init() {
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addCheck(CheckSeccompBaseline)
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}
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func CheckSeccompBaseline() Check {
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return Check{
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ID: "seccompProfile_baseline",
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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: seccompProfileBaseline_1_0,
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},
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{
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MinimumVersion: api.MajorMinorVersion(1, 19),
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CheckPod: seccompProfileBaseline_1_19,
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},
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},
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}
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}
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func validSeccomp(t corev1.SeccompProfileType) bool {
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return t == corev1.SeccompProfileTypeLocalhost ||
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t == corev1.SeccompProfileTypeRuntimeDefault
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}
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func validSeccompAnnotationValue(v string) bool {
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return v == corev1.SeccompProfileRuntimeDefault ||
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v == corev1.DeprecatedSeccompProfileDockerDefault ||
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strings.HasPrefix(v, corev1.SeccompLocalhostProfileNamePrefix)
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}
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// seccompProfileBaseline_1_0 checks baseline policy on seccomp alpha annotation
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func seccompProfileBaseline_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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forbidden := sets.NewString()
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if val, ok := podMetadata.Annotations[annotationKeyPod]; ok {
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if !validSeccompAnnotationValue(val) {
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forbidden.Insert(fmt.Sprintf("%s=%q", annotationKeyPod, val))
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}
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}
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visitContainersWithPath(podSpec, field.NewPath("spec"), func(c *corev1.Container, path *field.Path) {
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annotation := annotationKeyContainerPrefix + c.Name
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if val, ok := podMetadata.Annotations[annotation]; ok {
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if !validSeccompAnnotationValue(val) {
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forbidden.Insert(fmt.Sprintf("%s=%q", annotation, val))
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}
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}
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})
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if len(forbidden) > 0 {
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return CheckResult{
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Allowed: false,
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ForbiddenReason: "seccompProfile",
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ForbiddenDetail: fmt.Sprintf(
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"forbidden %s %s",
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pluralize("annotation", "annotations", len(forbidden)),
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strings.Join(forbidden.List(), ", "),
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),
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}
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}
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return CheckResult{Allowed: true}
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}
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// seccompProfileBaseline_1_19 checks baseline policy on securityContext.seccompProfile field
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func seccompProfileBaseline_1_19(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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// things that explicitly set seccompProfile.type to a bad value
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var badSetters []string
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badValues := sets.NewString()
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if podSpec.SecurityContext != nil && podSpec.SecurityContext.SeccompProfile != nil {
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if !validSeccomp(podSpec.SecurityContext.SeccompProfile.Type) {
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badSetters = append(badSetters, "pod")
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badValues.Insert(string(podSpec.SecurityContext.SeccompProfile.Type))
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}
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}
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// containers that explicitly set seccompProfile.type to a bad value
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var explicitlyBadContainers []string
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visitContainersWithPath(podSpec, field.NewPath("spec"), func(c *corev1.Container, path *field.Path) {
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if c.SecurityContext != nil && c.SecurityContext.SeccompProfile != nil {
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// container explicitly set seccompProfile
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if !validSeccomp(c.SecurityContext.SeccompProfile.Type) {
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// container explicitly set seccompProfile to a bad value
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explicitlyBadContainers = append(explicitlyBadContainers, c.Name)
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badValues.Insert(string(c.SecurityContext.SeccompProfile.Type))
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}
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}
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})
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if len(explicitlyBadContainers) > 0 {
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badSetters = append(
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badSetters,
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fmt.Sprintf(
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"%s %s",
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pluralize("container", "containers", len(explicitlyBadContainers)),
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joinQuote(explicitlyBadContainers),
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),
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)
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}
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// pod or containers explicitly set bad seccompProfiles
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if len(badSetters) > 0 {
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return CheckResult{
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Allowed: false,
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ForbiddenReason: "seccompProfile",
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ForbiddenDetail: fmt.Sprintf(
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"%s must not set securityContext.seccompProfile.type to %s",
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strings.Join(badSetters, " and "),
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joinQuote(badValues.List()),
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),
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}
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}
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return CheckResult{Allowed: true}
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}
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@ -0,0 +1,162 @@
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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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"testing"
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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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)
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func TestSeccompProfileBaseline_1_0(t *testing.T) {
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tests := []struct {
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name string
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pod *corev1.Pod
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expectReason string
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expectDetail string
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}{
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{
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name: "pod seccomp invalid",
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pod: &corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Annotations: map[string]string{
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"seccomp.security.alpha.kubernetes.io/pod": "unconfined",
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},
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},
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},
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expectReason: `seccompProfile`,
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expectDetail: `forbidden annotation seccomp.security.alpha.kubernetes.io/pod="unconfined"`,
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},
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{
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name: "containers seccomp invalid",
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pod: &corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Annotations: map[string]string{
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"container.seccomp.security.alpha.kubernetes.io/a": "unconfined",
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"container.seccomp.security.alpha.kubernetes.io/b": "unknown",
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},
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},
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Spec: corev1.PodSpec{
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Containers: []corev1.Container{{Name: "a"}, {Name: "b"}, {Name: "c"}},
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},
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},
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expectReason: `seccompProfile`,
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expectDetail: `forbidden annotations container.seccomp.security.alpha.kubernetes.io/a="unconfined", container.seccomp.security.alpha.kubernetes.io/b="unknown"`,
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},
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{
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name: "pod and containers seccomp invalid",
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pod: &corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Annotations: map[string]string{
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"seccomp.security.alpha.kubernetes.io/pod": "unconfined",
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"container.seccomp.security.alpha.kubernetes.io/a": "unconfined",
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"container.seccomp.security.alpha.kubernetes.io/b": "unknown",
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},
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},
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Spec: corev1.PodSpec{
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Containers: []corev1.Container{{Name: "a"}, {Name: "b"}, {Name: "c"}},
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},
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},
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expectReason: `seccompProfile`,
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expectDetail: `forbidden annotations container.seccomp.security.alpha.kubernetes.io/a="unconfined", container.seccomp.security.alpha.kubernetes.io/b="unknown", seccomp.security.alpha.kubernetes.io/pod="unconfined"`,
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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result := seccompProfileBaseline_1_0(&tc.pod.ObjectMeta, &tc.pod.Spec)
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if result.Allowed {
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t.Fatal("expected disallowed")
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}
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if e, a := tc.expectReason, result.ForbiddenReason; e != a {
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t.Errorf("expected\n%s\ngot\n%s", e, a)
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}
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if e, a := tc.expectDetail, result.ForbiddenDetail; e != a {
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t.Errorf("expected\n%s\ngot\n%s", e, a)
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}
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})
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}
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}
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func TestSeccompProfileBaseline_1_19(t *testing.T) {
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tests := []struct {
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name string
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pod *corev1.Pod
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expectReason string
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expectDetail string
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}{
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{
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name: "pod seccomp invalid",
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pod: &corev1.Pod{Spec: corev1.PodSpec{
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SecurityContext: &corev1.PodSecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}},
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Containers: []corev1.Container{
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{Name: "a", SecurityContext: nil},
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},
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}},
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expectReason: `seccompProfile`,
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expectDetail: `pod must not set securityContext.seccompProfile.type to "Unconfined"`,
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},
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{
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name: "containers seccomp invalid",
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pod: &corev1.Pod{Spec: corev1.PodSpec{
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SecurityContext: &corev1.PodSecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeRuntimeDefault}},
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Containers: []corev1.Container{
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{Name: "a", SecurityContext: nil},
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{Name: "b", SecurityContext: &corev1.SecurityContext{}},
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{Name: "c", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}}},
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{Name: "d", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}}},
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{Name: "e", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeRuntimeDefault}}},
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{Name: "f", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeRuntimeDefault}}},
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},
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}},
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expectReason: `seccompProfile`,
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expectDetail: `containers "c", "d" must not set securityContext.seccompProfile.type to "Unconfined"`,
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},
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{
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name: "pod and containers seccomp invalid",
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pod: &corev1.Pod{Spec: corev1.PodSpec{
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SecurityContext: &corev1.PodSecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}},
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Containers: []corev1.Container{
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{Name: "a", SecurityContext: nil},
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{Name: "b", SecurityContext: &corev1.SecurityContext{}},
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{Name: "c", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}}},
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{Name: "d", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeUnconfined}}},
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{Name: "e", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeRuntimeDefault}}},
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{Name: "f", SecurityContext: &corev1.SecurityContext{SeccompProfile: &corev1.SeccompProfile{Type: corev1.SeccompProfileTypeRuntimeDefault}}},
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},
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}},
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expectReason: `seccompProfile`,
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expectDetail: `pod and containers "c", "d" must not set securityContext.seccompProfile.type to "Unconfined"`,
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},
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}
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for _, tc := range tests {
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t.Run(tc.name, func(t *testing.T) {
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result := seccompProfileBaseline_1_19(&tc.pod.ObjectMeta, &tc.pod.Spec)
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if result.Allowed {
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t.Fatal("expected disallowed")
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}
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if e, a := tc.expectReason, result.ForbiddenReason; e != a {
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t.Errorf("expected\n%s\ngot\n%s", e, a)
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}
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if e, a := tc.expectDetail, result.ForbiddenDetail; e != a {
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t.Errorf("expected\n%s\ngot\n%s", e, a)
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}
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})
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}
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}
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@ -1,140 +0,0 @@
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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.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
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,
|
||||
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.
|
||||
*/
|
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|
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package policy
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import (
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"fmt"
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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/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/pod-security-admission/api"
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)
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const (
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annotationKeyPod = "seccomp.security.alpha.kubernetes.io/pod"
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annotationKeyContainerPrefix = "container.seccomp.security.alpha.kubernetes.io/"
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missingRequiredValue = "<missing required value>"
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)
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func init() {
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addCheck(CheckSeccompBaseline)
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}
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func fieldValue(f *field.Path, val string) string {
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return fmt.Sprintf("%s=%s", f.String(), val)
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}
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func fieldValueRequired(f *field.Path) string {
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return fmt.Sprintf("%s=%s", f.String(), missingRequiredValue)
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}
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func CheckSeccompBaseline() Check {
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return Check{
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ID: "seccomp_baseline",
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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: seccomp_1_0_baseline,
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},
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{
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MinimumVersion: api.MajorMinorVersion(1, 19),
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CheckPod: seccomp_1_19_baseline,
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},
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},
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}
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}
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func validSeccomp(t corev1.SeccompProfileType) bool {
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return t == corev1.SeccompProfileTypeLocalhost ||
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t == corev1.SeccompProfileTypeRuntimeDefault
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}
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// seccomp_1_0_baseline checks baseline policy on seccomp alpha annotation
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func seccomp_1_0_baseline(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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forbidden := sets.NewString()
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if val, ok := podMetadata.Annotations[annotationKeyPod]; ok {
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if val == corev1.SeccompProfileNameUnconfined {
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podAnnotationField := field.NewPath("metadata").Child("annotations", annotationKeyPod)
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forbidden.Insert(fieldValue(podAnnotationField, val))
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}
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}
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visitContainersWithPath(podSpec, field.NewPath("spec"), func(c *corev1.Container, path *field.Path) {
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annotation := annotationKeyContainerPrefix + c.Name
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if val, ok := podMetadata.Annotations[annotation]; ok {
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if val == corev1.SeccompProfileNameUnconfined {
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containerAnnotationField := field.NewPath("metadata").
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Child("annotations", annotation)
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forbidden.Insert(fieldValue(containerAnnotationField, val))
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}
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}
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})
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if len(forbidden) > 0 {
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return CheckResult{
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Allowed: false,
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ForbiddenReason: "seccomp profile",
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ForbiddenDetail: strings.Join(forbidden.List(), ", "),
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}
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}
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return CheckResult{Allowed: true}
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}
|
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|
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// seccomp_1_19_baseline checks baseline policy on securityContext.seccompProfile field
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func seccomp_1_19_baseline(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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forbidden := sets.NewString()
|
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|
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if podSpec.SecurityContext != nil {
|
||||
if podSpec.SecurityContext.SeccompProfile != nil {
|
||||
seccompType := podSpec.SecurityContext.SeccompProfile.Type
|
||||
if !validSeccomp(seccompType) {
|
||||
podSeccompField := field.NewPath("spec").Child("securityContext", "seccompProfile", "type")
|
||||
forbidden.Insert(fieldValue(podSeccompField, string(seccompType)))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
visitContainersWithPath(podSpec, field.NewPath("spec"), func(c *corev1.Container, path *field.Path) {
|
||||
if c.SecurityContext != nil {
|
||||
if c.SecurityContext.SeccompProfile != nil {
|
||||
if c.SecurityContext.SeccompProfile.Type != "" {
|
||||
seccompType := c.SecurityContext.SeccompProfile.Type
|
||||
if !validSeccomp(seccompType) {
|
||||
containerSeccompField := path.Child("securityContext", "seccompProfile", "type")
|
||||
forbidden.Insert(fieldValue(containerSeccompField, string(seccompType)))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
|
||||
if len(forbidden) > 0 {
|
||||
return CheckResult{
|
||||
Allowed: false,
|
||||
ForbiddenReason: "seccomp profile",
|
||||
ForbiddenDetail: strings.Join(forbidden.List(), ", "),
|
||||
}
|
||||
}
|
||||
|
||||
return CheckResult{Allowed: true}
|
||||
}
|
||||
@ -30,7 +30,7 @@ The check implementation looks at the appropriate value based on version.
|
||||
|
||||
func init() {
|
||||
fixtureData_baseline_1_0 := fixtureGenerator{
|
||||
expectErrorSubstring: "seccomp profile",
|
||||
expectErrorSubstring: "seccompProfile",
|
||||
generatePass: func(p *corev1.Pod) []*corev1.Pod {
|
||||
// don't generate fixtures if minimal valid pod already has seccomp config
|
||||
if val, ok := p.Annotations[annotationKeyPod]; ok &&
|
||||
@ -41,14 +41,11 @@ func init() {
|
||||
p = ensureAnnotation(p)
|
||||
return []*corev1.Pod{
|
||||
tweak(p, func(p *corev1.Pod) {
|
||||
// pod-level default
|
||||
p.Annotations[annotationKeyPod] = corev1.SeccompProfileRuntimeDefault
|
||||
p.Annotations[annotationKeyContainer(p.Spec.Containers[0])] = corev1.SeccompProfileRuntimeDefault
|
||||
p.Annotations[annotationKeyContainer(p.Spec.InitContainers[0])] = corev1.SeccompProfileRuntimeDefault
|
||||
}),
|
||||
tweak(p, func(p *corev1.Pod) {
|
||||
p.Annotations[annotationKeyPod] = corev1.SeccompLocalhostProfileNamePrefix + "testing"
|
||||
// container-level localhost
|
||||
p.Annotations[annotationKeyContainer(p.Spec.Containers[0])] = corev1.SeccompLocalhostProfileNamePrefix + "testing"
|
||||
p.Annotations[annotationKeyContainer(p.Spec.InitContainers[0])] = corev1.SeccompLocalhostProfileNamePrefix + "testing"
|
||||
// init-container unset
|
||||
}),
|
||||
}
|
||||
},
|
||||
@ -69,7 +66,7 @@ func init() {
|
||||
}
|
||||
|
||||
fixtureData_baseline_1_19 := fixtureGenerator{
|
||||
expectErrorSubstring: "seccomp profile",
|
||||
expectErrorSubstring: "seccompProfile",
|
||||
generatePass: func(p *corev1.Pod) []*corev1.Pod {
|
||||
// don't generate fixtures if minimal valid pod already has seccomp config
|
||||
if p.Spec.SecurityContext != nil &&
|
||||
@ -81,14 +78,11 @@ func init() {
|
||||
p = ensureSecurityContext(p)
|
||||
return []*corev1.Pod{
|
||||
tweak(p, func(p *corev1.Pod) {
|
||||
// pod-level default
|
||||
p.Spec.SecurityContext.SeccompProfile = seccompProfileRuntimeDefault
|
||||
// container-level localhost
|
||||
p.Spec.Containers[0].SecurityContext.SeccompProfile = seccompProfileRuntimeDefault
|
||||
p.Spec.InitContainers[0].SecurityContext.SeccompProfile = seccompProfileRuntimeDefault
|
||||
}),
|
||||
tweak(p, func(p *corev1.Pod) {
|
||||
p.Spec.SecurityContext.SeccompProfile = seccompProfileLocalhost("testing")
|
||||
p.Spec.Containers[0].SecurityContext.SeccompProfile = seccompProfileLocalhost("testing")
|
||||
p.Spec.InitContainers[0].SecurityContext.SeccompProfile = seccompProfileLocalhost("testing")
|
||||
// init-container unset
|
||||
}),
|
||||
}
|
||||
},
|
||||
@ -109,12 +103,12 @@ func init() {
|
||||
}
|
||||
|
||||
registerFixtureGenerator(
|
||||
fixtureKey{level: api.LevelBaseline, version: api.MajorMinorVersion(1, 0), check: "seccomp_baseline"},
|
||||
fixtureKey{level: api.LevelBaseline, version: api.MajorMinorVersion(1, 0), check: "seccompProfile_baseline"},
|
||||
fixtureData_baseline_1_0,
|
||||
)
|
||||
|
||||
registerFixtureGenerator(
|
||||
fixtureKey{level: api.LevelBaseline, version: api.MajorMinorVersion(1, 19), check: "seccomp_baseline"},
|
||||
fixtureKey{level: api.LevelBaseline, version: api.MajorMinorVersion(1, 19), check: "seccompProfile_baseline"},
|
||||
fixtureData_baseline_1_19,
|
||||
)
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user