kubernetes/plugin/pkg/admission/security/podsecuritypolicy/admission_test.go

1785 lines
58 KiB
Go

/*
Copyright 2016 The Kubernetes 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 podsecuritypolicy
import (
"fmt"
"reflect"
"strings"
"testing"
"github.com/stretchr/testify/assert"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/diff"
"k8s.io/apimachinery/pkg/util/sets"
kadmission "k8s.io/apiserver/pkg/admission"
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/apiserver/pkg/authorization/authorizer"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/helper"
"k8s.io/kubernetes/pkg/apis/extensions"
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
extensionslisters "k8s.io/kubernetes/pkg/client/listers/extensions/internalversion"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/security/apparmor"
kpsp "k8s.io/kubernetes/pkg/security/podsecuritypolicy"
"k8s.io/kubernetes/pkg/security/podsecuritypolicy/seccomp"
psputil "k8s.io/kubernetes/pkg/security/podsecuritypolicy/util"
)
const defaultContainerName = "test-c"
// NewTestAdmission provides an admission plugin with test implementations of internal structs. It uses
// an authorizer that always returns true.
func NewTestAdmission(lister extensionslisters.PodSecurityPolicyLister) kadmission.Interface {
return &podSecurityPolicyPlugin{
Handler: kadmission.NewHandler(kadmission.Create),
strategyFactory: kpsp.NewSimpleStrategyFactory(),
pspMatcher: getMatchingPolicies,
authz: &TestAuthorizer{},
lister: lister,
}
}
// TestAlwaysAllowedAuthorizer is a testing struct for testing that fulfills the authorizer interface.
type TestAuthorizer struct {
// usernameToNamespaceToAllowedPSPs contains the map of allowed PSPs.
// if nil, all PSPs are allowed.
usernameToNamespaceToAllowedPSPs map[string]map[string]map[string]bool
}
func (t *TestAuthorizer) Authorize(a authorizer.Attributes) (authorized bool, reason string, err error) {
if t.usernameToNamespaceToAllowedPSPs == nil {
return true, "", nil
}
allowedInNamespace := t.usernameToNamespaceToAllowedPSPs[a.GetUser().GetName()][a.GetNamespace()][a.GetName()]
allowedClusterWide := t.usernameToNamespaceToAllowedPSPs[a.GetUser().GetName()][""][a.GetName()]
return (allowedInNamespace || allowedClusterWide), "", nil
}
var _ authorizer.Authorizer = &TestAuthorizer{}
func useInitContainers(pod *kapi.Pod) *kapi.Pod {
pod.Spec.InitContainers = pod.Spec.Containers
pod.Spec.Containers = []kapi.Container{}
return pod
}
func TestAdmitSeccomp(t *testing.T) {
containerName := "container"
tests := map[string]struct {
pspAnnotations map[string]string
podAnnotations map[string]string
shouldAdmit bool
}{
"no seccomp, no pod annotations": {
pspAnnotations: nil,
podAnnotations: nil,
shouldAdmit: true,
},
"no seccomp, pod annotations": {
pspAnnotations: nil,
podAnnotations: map[string]string{
kapi.SeccompPodAnnotationKey: "foo",
},
shouldAdmit: false,
},
"no seccomp, container annotations": {
pspAnnotations: nil,
podAnnotations: map[string]string{
kapi.SeccompContainerAnnotationKeyPrefix + containerName: "foo",
},
shouldAdmit: false,
},
"seccomp, allow any no pod annotation": {
pspAnnotations: map[string]string{
seccomp.AllowedProfilesAnnotationKey: seccomp.AllowAny,
},
podAnnotations: nil,
shouldAdmit: true,
},
"seccomp, allow any pod annotation": {
pspAnnotations: map[string]string{
seccomp.AllowedProfilesAnnotationKey: seccomp.AllowAny,
},
podAnnotations: map[string]string{
kapi.SeccompPodAnnotationKey: "foo",
},
shouldAdmit: true,
},
"seccomp, allow any container annotation": {
pspAnnotations: map[string]string{
seccomp.AllowedProfilesAnnotationKey: seccomp.AllowAny,
},
podAnnotations: map[string]string{
kapi.SeccompContainerAnnotationKeyPrefix + containerName: "foo",
},
shouldAdmit: true,
},
"seccomp, allow specific pod annotation failure": {
pspAnnotations: map[string]string{
seccomp.AllowedProfilesAnnotationKey: "foo",
},
podAnnotations: map[string]string{
kapi.SeccompPodAnnotationKey: "bar",
},
shouldAdmit: false,
},
"seccomp, allow specific container annotation failure": {
pspAnnotations: map[string]string{
// provide a default so we don't have to give the pod annotation
seccomp.DefaultProfileAnnotationKey: "foo",
seccomp.AllowedProfilesAnnotationKey: "foo",
},
podAnnotations: map[string]string{
kapi.SeccompContainerAnnotationKeyPrefix + containerName: "bar",
},
shouldAdmit: false,
},
"seccomp, allow specific pod annotation pass": {
pspAnnotations: map[string]string{
seccomp.AllowedProfilesAnnotationKey: "foo",
},
podAnnotations: map[string]string{
kapi.SeccompPodAnnotationKey: "foo",
},
shouldAdmit: true,
},
"seccomp, allow specific container annotation pass": {
pspAnnotations: map[string]string{
// provide a default so we don't have to give the pod annotation
seccomp.DefaultProfileAnnotationKey: "foo",
seccomp.AllowedProfilesAnnotationKey: "foo,bar",
},
podAnnotations: map[string]string{
kapi.SeccompContainerAnnotationKeyPrefix + containerName: "bar",
},
shouldAdmit: true,
},
}
for k, v := range tests {
psp := restrictivePSP()
psp.Annotations = v.pspAnnotations
pod := &kapi.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: v.podAnnotations,
},
Spec: kapi.PodSpec{
Containers: []kapi.Container{
{Name: containerName},
},
},
}
testPSPAdmit(k, []*extensions.PodSecurityPolicy{psp}, pod, v.shouldAdmit, psp.Name, t)
}
}
func TestAdmitPrivileged(t *testing.T) {
createPodWithPriv := func(priv bool) *kapi.Pod {
pod := goodPod()
pod.Spec.Containers[0].SecurityContext.Privileged = &priv
return pod
}
nonPrivilegedPSP := restrictivePSP()
nonPrivilegedPSP.Name = "non-priv"
nonPrivilegedPSP.Spec.Privileged = false
privilegedPSP := restrictivePSP()
privilegedPSP.Name = "priv"
privilegedPSP.Spec.Privileged = true
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedPriv bool
expectedPSP string
}{
"pod without priv request allowed under non priv PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{nonPrivilegedPSP},
shouldPass: true,
expectedPriv: false,
expectedPSP: nonPrivilegedPSP.Name,
},
"pod without priv request allowed under priv PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{privilegedPSP},
shouldPass: true,
expectedPriv: false,
expectedPSP: privilegedPSP.Name,
},
"pod with priv request denied by non priv PSP": {
pod: createPodWithPriv(true),
psps: []*extensions.PodSecurityPolicy{nonPrivilegedPSP},
shouldPass: false,
},
"pod with priv request allowed by priv PSP": {
pod: createPodWithPriv(true),
psps: []*extensions.PodSecurityPolicy{nonPrivilegedPSP, privilegedPSP},
shouldPass: true,
expectedPriv: true,
expectedPSP: privilegedPSP.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.Containers[0].SecurityContext.Privileged == nil ||
*v.pod.Spec.Containers[0].SecurityContext.Privileged != v.expectedPriv {
t.Errorf("%s expected privileged to be %t", k, v.expectedPriv)
}
}
}
}
func TestAdmitCaps(t *testing.T) {
createPodWithCaps := func(caps *kapi.Capabilities) *kapi.Pod {
pod := goodPod()
pod.Spec.Containers[0].SecurityContext.Capabilities = caps
return pod
}
restricted := restrictivePSP()
allowsFooInAllowed := restrictivePSP()
allowsFooInAllowed.Name = "allowCapInAllowed"
allowsFooInAllowed.Spec.AllowedCapabilities = []kapi.Capability{"foo"}
allowsFooInRequired := restrictivePSP()
allowsFooInRequired.Name = "allowCapInRequired"
allowsFooInRequired.Spec.DefaultAddCapabilities = []kapi.Capability{"foo"}
requiresFooToBeDropped := restrictivePSP()
requiresFooToBeDropped.Name = "requireDrop"
requiresFooToBeDropped.Spec.RequiredDropCapabilities = []kapi.Capability{"foo"}
tc := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedCapabilities *kapi.Capabilities
expectedPSP string
}{
// UC 1: if a PSP does not define allowed or required caps then a pod requesting a cap
// should be rejected.
"should reject cap add when not allowed or required": {
pod: createPodWithCaps(&kapi.Capabilities{Add: []kapi.Capability{"foo"}}),
psps: []*extensions.PodSecurityPolicy{restricted},
shouldPass: false,
},
// UC 2: if a PSP allows a cap in the allowed field it should accept the pod request
// to add the cap.
"should accept cap add when in allowed": {
pod: createPodWithCaps(&kapi.Capabilities{Add: []kapi.Capability{"foo"}}),
psps: []*extensions.PodSecurityPolicy{restricted, allowsFooInAllowed},
shouldPass: true,
expectedPSP: allowsFooInAllowed.Name,
},
// UC 3: if a PSP requires a cap then it should accept the pod request
// to add the cap.
"should accept cap add when in required": {
pod: createPodWithCaps(&kapi.Capabilities{Add: []kapi.Capability{"foo"}}),
psps: []*extensions.PodSecurityPolicy{restricted, allowsFooInRequired},
shouldPass: true,
expectedPSP: allowsFooInRequired.Name,
},
// UC 4: if a PSP requires a cap to be dropped then it should fail both
// in the verification of adds and verification of drops
"should reject cap add when requested cap is required to be dropped": {
pod: createPodWithCaps(&kapi.Capabilities{Add: []kapi.Capability{"foo"}}),
psps: []*extensions.PodSecurityPolicy{restricted, requiresFooToBeDropped},
shouldPass: false,
},
// UC 5: if a PSP requires a cap to be dropped it should accept
// a manual request to drop the cap.
"should accept cap drop when cap is required to be dropped": {
pod: createPodWithCaps(&kapi.Capabilities{Drop: []kapi.Capability{"foo"}}),
psps: []*extensions.PodSecurityPolicy{requiresFooToBeDropped},
shouldPass: true,
expectedPSP: requiresFooToBeDropped.Name,
},
// UC 6: required add is defaulted
"required add is defaulted": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{allowsFooInRequired},
shouldPass: true,
expectedCapabilities: &kapi.Capabilities{
Add: []kapi.Capability{"foo"},
},
expectedPSP: allowsFooInRequired.Name,
},
// UC 7: required drop is defaulted
"required drop is defaulted": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{requiresFooToBeDropped},
shouldPass: true,
expectedCapabilities: &kapi.Capabilities{
Drop: []kapi.Capability{"foo"},
},
expectedPSP: requiresFooToBeDropped.Name,
},
}
for k, v := range tc {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.expectedCapabilities != nil {
if !reflect.DeepEqual(v.expectedCapabilities, v.pod.Spec.Containers[0].SecurityContext.Capabilities) {
t.Errorf("%s resulted in caps that were not expected - expected: %v, received: %v", k, v.expectedCapabilities, v.pod.Spec.Containers[0].SecurityContext.Capabilities)
}
}
}
for k, v := range tc {
useInitContainers(v.pod)
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.expectedCapabilities != nil {
if !reflect.DeepEqual(v.expectedCapabilities, v.pod.Spec.InitContainers[0].SecurityContext.Capabilities) {
t.Errorf("%s resulted in caps that were not expected - expected: %v, received: %v", k, v.expectedCapabilities, v.pod.Spec.InitContainers[0].SecurityContext.Capabilities)
}
}
}
}
func TestAdmitVolumes(t *testing.T) {
val := reflect.ValueOf(kapi.VolumeSource{})
for i := 0; i < val.NumField(); i++ {
// reflectively create the volume source
fieldVal := val.Type().Field(i)
volumeSource := kapi.VolumeSource{}
volumeSourceVolume := reflect.New(fieldVal.Type.Elem())
reflect.ValueOf(&volumeSource).Elem().FieldByName(fieldVal.Name).Set(volumeSourceVolume)
volume := kapi.Volume{VolumeSource: volumeSource}
// sanity check before moving on
fsType, err := psputil.GetVolumeFSType(volume)
if err != nil {
t.Errorf("error getting FSType for %s: %s", fieldVal.Name, err.Error())
continue
}
// add the volume to the pod
pod := goodPod()
pod.Spec.Volumes = []kapi.Volume{volume}
// create a PSP that allows no volumes
psp := restrictivePSP()
// expect a denial for this PSP
testPSPAdmit(fmt.Sprintf("%s denial", string(fsType)), []*extensions.PodSecurityPolicy{psp}, pod, false, "", t)
// also expect a denial for this PSP if it's an init container
useInitContainers(pod)
testPSPAdmit(fmt.Sprintf("%s denial", string(fsType)), []*extensions.PodSecurityPolicy{psp}, pod, false, "", t)
// now add the fstype directly to the psp and it should validate
psp.Spec.Volumes = []extensions.FSType{fsType}
testPSPAdmit(fmt.Sprintf("%s direct accept", string(fsType)), []*extensions.PodSecurityPolicy{psp}, pod, true, psp.Name, t)
// now change the psp to allow any volumes and the pod should still validate
psp.Spec.Volumes = []extensions.FSType{extensions.All}
testPSPAdmit(fmt.Sprintf("%s wildcard accept", string(fsType)), []*extensions.PodSecurityPolicy{psp}, pod, true, psp.Name, t)
}
}
func TestAdmitHostNetwork(t *testing.T) {
createPodWithHostNetwork := func(hostNetwork bool) *kapi.Pod {
pod := goodPod()
pod.Spec.SecurityContext.HostNetwork = hostNetwork
return pod
}
noHostNetwork := restrictivePSP()
noHostNetwork.Name = "no-hostnetwork"
noHostNetwork.Spec.HostNetwork = false
hostNetwork := restrictivePSP()
hostNetwork.Name = "hostnetwork"
hostNetwork.Spec.HostNetwork = true
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedHostNetwork bool
expectedPSP string
}{
"pod without hostnetwork request allowed under noHostNetwork PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{noHostNetwork},
shouldPass: true,
expectedHostNetwork: false,
expectedPSP: noHostNetwork.Name,
},
"pod without hostnetwork request allowed under hostNetwork PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{hostNetwork},
shouldPass: true,
expectedHostNetwork: false,
expectedPSP: hostNetwork.Name,
},
"pod with hostnetwork request denied by noHostNetwork PSP": {
pod: createPodWithHostNetwork(true),
psps: []*extensions.PodSecurityPolicy{noHostNetwork},
shouldPass: false,
},
"pod with hostnetwork request allowed by hostNetwork PSP": {
pod: createPodWithHostNetwork(true),
psps: []*extensions.PodSecurityPolicy{noHostNetwork, hostNetwork},
shouldPass: true,
expectedHostNetwork: true,
expectedPSP: hostNetwork.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.HostNetwork != v.expectedHostNetwork {
t.Errorf("%s expected hostNetwork to be %t", k, v.expectedHostNetwork)
}
}
}
// test again with init containers
for k, v := range tests {
useInitContainers(v.pod)
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.HostNetwork != v.expectedHostNetwork {
t.Errorf("%s expected hostNetwork to be %t", k, v.expectedHostNetwork)
}
}
}
}
func TestAdmitHostPorts(t *testing.T) {
createPodWithHostPorts := func(port int32) *kapi.Pod {
pod := goodPod()
pod.Spec.Containers[0].Ports = []kapi.ContainerPort{
{HostPort: port},
}
return pod
}
noHostPorts := restrictivePSP()
noHostPorts.Name = "noHostPorts"
hostPorts := restrictivePSP()
hostPorts.Name = "hostPorts"
hostPorts.Spec.HostPorts = []extensions.HostPortRange{
{Min: 1, Max: 10},
}
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedPSP string
}{
"host port out of range": {
pod: createPodWithHostPorts(11),
psps: []*extensions.PodSecurityPolicy{hostPorts},
shouldPass: false,
},
"host port in range": {
pod: createPodWithHostPorts(5),
psps: []*extensions.PodSecurityPolicy{hostPorts},
shouldPass: true,
expectedPSP: hostPorts.Name,
},
"no host ports with range": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{hostPorts},
shouldPass: true,
expectedPSP: hostPorts.Name,
},
"no host ports without range": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{noHostPorts},
shouldPass: true,
expectedPSP: noHostPorts.Name,
},
"host ports without range": {
pod: createPodWithHostPorts(5),
psps: []*extensions.PodSecurityPolicy{noHostPorts},
shouldPass: false,
},
}
for i := 0; i < 2; i++ {
for k, v := range tests {
v.pod.Spec.Containers, v.pod.Spec.InitContainers = v.pod.Spec.InitContainers, v.pod.Spec.Containers
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
}
}
}
func TestAdmitHostPID(t *testing.T) {
createPodWithHostPID := func(hostPID bool) *kapi.Pod {
pod := goodPod()
pod.Spec.SecurityContext.HostPID = hostPID
return pod
}
noHostPID := restrictivePSP()
noHostPID.Name = "no-hostpid"
noHostPID.Spec.HostPID = false
hostPID := restrictivePSP()
hostPID.Name = "hostpid"
hostPID.Spec.HostPID = true
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedHostPID bool
expectedPSP string
}{
"pod without hostpid request allowed under noHostPID PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{noHostPID},
shouldPass: true,
expectedHostPID: false,
expectedPSP: noHostPID.Name,
},
"pod without hostpid request allowed under hostPID PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{hostPID},
shouldPass: true,
expectedHostPID: false,
expectedPSP: hostPID.Name,
},
"pod with hostpid request denied by noHostPID PSP": {
pod: createPodWithHostPID(true),
psps: []*extensions.PodSecurityPolicy{noHostPID},
shouldPass: false,
},
"pod with hostpid request allowed by hostPID PSP": {
pod: createPodWithHostPID(true),
psps: []*extensions.PodSecurityPolicy{noHostPID, hostPID},
shouldPass: true,
expectedHostPID: true,
expectedPSP: hostPID.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.HostPID != v.expectedHostPID {
t.Errorf("%s expected hostPID to be %t", k, v.expectedHostPID)
}
}
}
}
func TestAdmitHostIPC(t *testing.T) {
createPodWithHostIPC := func(hostIPC bool) *kapi.Pod {
pod := goodPod()
pod.Spec.SecurityContext.HostIPC = hostIPC
return pod
}
noHostIPC := restrictivePSP()
noHostIPC.Name = "no-hostIPC"
noHostIPC.Spec.HostIPC = false
hostIPC := restrictivePSP()
hostIPC.Name = "hostIPC"
hostIPC.Spec.HostIPC = true
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedHostIPC bool
expectedPSP string
}{
"pod without hostIPC request allowed under noHostIPC PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{noHostIPC},
shouldPass: true,
expectedHostIPC: false,
expectedPSP: noHostIPC.Name,
},
"pod without hostIPC request allowed under hostIPC PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{hostIPC},
shouldPass: true,
expectedHostIPC: false,
expectedPSP: hostIPC.Name,
},
"pod with hostIPC request denied by noHostIPC PSP": {
pod: createPodWithHostIPC(true),
psps: []*extensions.PodSecurityPolicy{noHostIPC},
shouldPass: false,
},
"pod with hostIPC request allowed by hostIPC PSP": {
pod: createPodWithHostIPC(true),
psps: []*extensions.PodSecurityPolicy{noHostIPC, hostIPC},
shouldPass: true,
expectedHostIPC: true,
expectedPSP: hostIPC.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.HostIPC != v.expectedHostIPC {
t.Errorf("%s expected hostIPC to be %t", k, v.expectedHostIPC)
}
}
}
}
func TestAdmitSELinux(t *testing.T) {
createPodWithSELinux := func(opts *kapi.SELinuxOptions) *kapi.Pod {
pod := goodPod()
// doesn't matter if we set it here or on the container, the
// admission controller uses DetermineEffectiveSC to get the defaulting
// behavior so it can validate what will be applied at runtime
pod.Spec.SecurityContext.SELinuxOptions = opts
return pod
}
runAsAny := restrictivePSP()
runAsAny.Name = "runAsAny"
runAsAny.Spec.SELinux.Rule = extensions.SELinuxStrategyRunAsAny
mustRunAs := restrictivePSP()
mustRunAs.Name = "mustRunAs"
mustRunAs.Spec.SELinux.SELinuxOptions.Level = "level"
mustRunAs.Spec.SELinux.SELinuxOptions.Role = "role"
mustRunAs.Spec.SELinux.SELinuxOptions.Type = "type"
mustRunAs.Spec.SELinux.SELinuxOptions.User = "user"
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedSELinux *kapi.SELinuxOptions
expectedPSP string
}{
"runAsAny with no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedSELinux: nil,
expectedPSP: runAsAny.Name,
},
"runAsAny with pod request": {
pod: createPodWithSELinux(&kapi.SELinuxOptions{User: "foo"}),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedSELinux: &kapi.SELinuxOptions{User: "foo"},
expectedPSP: runAsAny.Name,
},
"mustRunAs with bad pod request": {
pod: createPodWithSELinux(&kapi.SELinuxOptions{User: "foo"}),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: false,
},
"mustRunAs with no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedSELinux: mustRunAs.Spec.SELinux.SELinuxOptions,
expectedPSP: mustRunAs.Name,
},
"mustRunAs with good pod request": {
pod: createPodWithSELinux(&kapi.SELinuxOptions{Level: "level", Role: "role", Type: "type", User: "user"}),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedSELinux: mustRunAs.Spec.SELinux.SELinuxOptions,
expectedPSP: mustRunAs.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions == nil && v.expectedSELinux == nil {
// ok, don't need to worry about identifying specific diffs
continue
}
if v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions == nil && v.expectedSELinux != nil {
t.Errorf("%s expected selinux to be: %v but found nil", k, v.expectedSELinux)
continue
}
if v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions != nil && v.expectedSELinux == nil {
t.Errorf("%s expected selinux to be nil but found: %v", k, *v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions)
continue
}
if !reflect.DeepEqual(*v.expectedSELinux, *v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions) {
t.Errorf("%s expected selinux to be: %v but found %v", k, *v.expectedSELinux, *v.pod.Spec.Containers[0].SecurityContext.SELinuxOptions)
}
}
}
}
func TestAdmitAppArmor(t *testing.T) {
createPodWithAppArmor := func(profile string) *kapi.Pod {
pod := goodPod()
apparmor.SetProfileNameFromPodAnnotations(pod.Annotations, defaultContainerName, profile)
return pod
}
unconstrainedPSP := restrictivePSP()
defaultedPSP := restrictivePSP()
defaultedPSP.Annotations = map[string]string{
apparmor.DefaultProfileAnnotationKey: apparmor.ProfileRuntimeDefault,
}
appArmorPSP := restrictivePSP()
appArmorPSP.Annotations = map[string]string{
apparmor.AllowedProfilesAnnotationKey: apparmor.ProfileRuntimeDefault,
}
appArmorDefaultPSP := restrictivePSP()
appArmorDefaultPSP.Annotations = map[string]string{
apparmor.DefaultProfileAnnotationKey: apparmor.ProfileRuntimeDefault,
apparmor.AllowedProfilesAnnotationKey: apparmor.ProfileRuntimeDefault + "," + apparmor.ProfileNamePrefix + "foo",
}
tests := map[string]struct {
pod *kapi.Pod
psp *extensions.PodSecurityPolicy
shouldPass bool
expectedProfile string
}{
"unconstrained with no profile": {
pod: goodPod(),
psp: unconstrainedPSP,
shouldPass: true,
expectedProfile: "",
},
"unconstrained with profile": {
pod: createPodWithAppArmor(apparmor.ProfileRuntimeDefault),
psp: unconstrainedPSP,
shouldPass: true,
expectedProfile: apparmor.ProfileRuntimeDefault,
},
"unconstrained with default profile": {
pod: goodPod(),
psp: defaultedPSP,
shouldPass: true,
expectedProfile: apparmor.ProfileRuntimeDefault,
},
"AppArmor enforced with no profile": {
pod: goodPod(),
psp: appArmorPSP,
shouldPass: false,
},
"AppArmor enforced with default profile": {
pod: goodPod(),
psp: appArmorDefaultPSP,
shouldPass: true,
expectedProfile: apparmor.ProfileRuntimeDefault,
},
"AppArmor enforced with good profile": {
pod: createPodWithAppArmor(apparmor.ProfileNamePrefix + "foo"),
psp: appArmorDefaultPSP,
shouldPass: true,
expectedProfile: apparmor.ProfileNamePrefix + "foo",
},
"AppArmor enforced with local profile": {
pod: createPodWithAppArmor(apparmor.ProfileNamePrefix + "bar"),
psp: appArmorPSP,
shouldPass: false,
},
}
for k, v := range tests {
testPSPAdmit(k, []*extensions.PodSecurityPolicy{v.psp}, v.pod, v.shouldPass, v.psp.Name, t)
if v.shouldPass {
assert.Equal(t, v.expectedProfile, apparmor.GetProfileNameFromPodAnnotations(v.pod.Annotations, defaultContainerName), k)
}
}
}
func TestAdmitRunAsUser(t *testing.T) {
createPodWithRunAsUser := func(user int64) *kapi.Pod {
pod := goodPod()
// doesn't matter if we set it here or on the container, the
// admission controller uses DetermineEffectiveSC to get the defaulting
// behavior so it can validate what will be applied at runtime
userID := int64(user)
pod.Spec.SecurityContext.RunAsUser = &userID
return pod
}
runAsAny := restrictivePSP()
runAsAny.Name = "runAsAny"
runAsAny.Spec.RunAsUser.Rule = extensions.RunAsUserStrategyRunAsAny
mustRunAs := restrictivePSP()
mustRunAs.Name = "mustRunAs"
runAsNonRoot := restrictivePSP()
runAsNonRoot.Name = "runAsNonRoot"
runAsNonRoot.Spec.RunAsUser.Rule = extensions.RunAsUserStrategyMustRunAsNonRoot
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedRunAsUser *int64
expectedPSP string
}{
"runAsAny no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedRunAsUser: nil,
expectedPSP: runAsAny.Name,
},
"runAsAny pod request": {
pod: createPodWithRunAsUser(1),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedRunAsUser: userIDPtr(1),
expectedPSP: runAsAny.Name,
},
"mustRunAs pod request out of range": {
pod: createPodWithRunAsUser(1),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: false,
},
"mustRunAs pod request in range": {
pod: createPodWithRunAsUser(999),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedRunAsUser: &mustRunAs.Spec.RunAsUser.Ranges[0].Min,
expectedPSP: mustRunAs.Name,
},
"mustRunAs no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedRunAsUser: &mustRunAs.Spec.RunAsUser.Ranges[0].Min,
expectedPSP: mustRunAs.Name,
},
"runAsNonRoot no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{runAsNonRoot},
shouldPass: true,
expectedRunAsUser: nil,
expectedPSP: runAsNonRoot.Name,
},
"runAsNonRoot pod request root": {
pod: createPodWithRunAsUser(0),
psps: []*extensions.PodSecurityPolicy{runAsNonRoot},
shouldPass: false,
},
"runAsNonRoot pod request non-root": {
pod: createPodWithRunAsUser(1),
psps: []*extensions.PodSecurityPolicy{runAsNonRoot},
shouldPass: true,
expectedRunAsUser: userIDPtr(1),
expectedPSP: runAsNonRoot.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.Containers[0].SecurityContext.RunAsUser == nil && v.expectedRunAsUser == nil {
// ok, don't need to worry about identifying specific diffs
continue
}
if v.pod.Spec.Containers[0].SecurityContext.RunAsUser == nil && v.expectedRunAsUser != nil {
t.Errorf("%s expected RunAsUser to be: %v but found nil", k, v.expectedRunAsUser)
continue
}
if v.pod.Spec.Containers[0].SecurityContext.RunAsUser != nil && v.expectedRunAsUser == nil {
t.Errorf("%s expected RunAsUser to be nil but found: %v", k, *v.pod.Spec.Containers[0].SecurityContext.RunAsUser)
continue
}
if *v.expectedRunAsUser != *v.pod.Spec.Containers[0].SecurityContext.RunAsUser {
t.Errorf("%s expected RunAsUser to be: %v but found %v", k, *v.expectedRunAsUser, *v.pod.Spec.Containers[0].SecurityContext.RunAsUser)
}
}
}
}
func TestAdmitSupplementalGroups(t *testing.T) {
createPodWithSupGroup := func(group int64) *kapi.Pod {
pod := goodPod()
// doesn't matter if we set it here or on the container, the
// admission controller uses DetermineEffectiveSC to get the defaulting
// behavior so it can validate what will be applied at runtime
groupID := int64(group)
pod.Spec.SecurityContext.SupplementalGroups = []int64{groupID}
return pod
}
runAsAny := restrictivePSP()
runAsAny.Name = "runAsAny"
runAsAny.Spec.SupplementalGroups.Rule = extensions.SupplementalGroupsStrategyRunAsAny
mustRunAs := restrictivePSP()
mustRunAs.Name = "mustRunAs"
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedSupGroups []int64
expectedPSP string
}{
"runAsAny no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedSupGroups: []int64{},
expectedPSP: runAsAny.Name,
},
"runAsAny pod request": {
pod: createPodWithSupGroup(1),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedSupGroups: []int64{1},
expectedPSP: runAsAny.Name,
},
"mustRunAs no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedSupGroups: []int64{mustRunAs.Spec.SupplementalGroups.Ranges[0].Min},
expectedPSP: mustRunAs.Name,
},
"mustRunAs bad pod request": {
pod: createPodWithSupGroup(1),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: false,
},
"mustRunAs good pod request": {
pod: createPodWithSupGroup(999),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedSupGroups: []int64{999},
expectedPSP: mustRunAs.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.SupplementalGroups == nil && v.expectedSupGroups != nil {
t.Errorf("%s expected SupplementalGroups to be: %v but found nil", k, v.expectedSupGroups)
continue
}
if v.pod.Spec.SecurityContext.SupplementalGroups != nil && v.expectedSupGroups == nil {
t.Errorf("%s expected SupplementalGroups to be nil but found: %v", k, v.pod.Spec.SecurityContext.SupplementalGroups)
continue
}
if !reflect.DeepEqual(v.expectedSupGroups, v.pod.Spec.SecurityContext.SupplementalGroups) {
t.Errorf("%s expected SupplementalGroups to be: %v but found %v", k, v.expectedSupGroups, v.pod.Spec.SecurityContext.SupplementalGroups)
}
}
}
}
func TestAdmitFSGroup(t *testing.T) {
createPodWithFSGroup := func(group int) *kapi.Pod {
pod := goodPod()
// doesn't matter if we set it here or on the container, the
// admission controller uses DetermineEffectiveSC to get the defaulting
// behavior so it can validate what will be applied at runtime
pod.Spec.SecurityContext.FSGroup = groupIDPtr(group)
return pod
}
runAsAny := restrictivePSP()
runAsAny.Name = "runAsAny"
runAsAny.Spec.FSGroup.Rule = extensions.FSGroupStrategyRunAsAny
mustRunAs := restrictivePSP()
mustRunAs.Name = "mustRunAs"
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedFSGroup *int64
expectedPSP string
}{
"runAsAny no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedFSGroup: nil,
expectedPSP: runAsAny.Name,
},
"runAsAny pod request": {
pod: createPodWithFSGroup(1),
psps: []*extensions.PodSecurityPolicy{runAsAny},
shouldPass: true,
expectedFSGroup: groupIDPtr(1),
expectedPSP: runAsAny.Name,
},
"mustRunAs no pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedFSGroup: &mustRunAs.Spec.SupplementalGroups.Ranges[0].Min,
expectedPSP: mustRunAs.Name,
},
"mustRunAs bad pod request": {
pod: createPodWithFSGroup(1),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: false,
},
"mustRunAs good pod request": {
pod: createPodWithFSGroup(999),
psps: []*extensions.PodSecurityPolicy{mustRunAs},
shouldPass: true,
expectedFSGroup: groupIDPtr(999),
expectedPSP: mustRunAs.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.SecurityContext.FSGroup == nil && v.expectedFSGroup == nil {
// ok, don't need to worry about identifying specific diffs
continue
}
if v.pod.Spec.SecurityContext.FSGroup == nil && v.expectedFSGroup != nil {
t.Errorf("%s expected FSGroup to be: %v but found nil", k, *v.expectedFSGroup)
continue
}
if v.pod.Spec.SecurityContext.FSGroup != nil && v.expectedFSGroup == nil {
t.Errorf("%s expected FSGroup to be nil but found: %v", k, *v.pod.Spec.SecurityContext.FSGroup)
continue
}
if *v.expectedFSGroup != *v.pod.Spec.SecurityContext.FSGroup {
t.Errorf("%s expected FSGroup to be: %v but found %v", k, *v.expectedFSGroup, *v.pod.Spec.SecurityContext.FSGroup)
}
}
}
}
func TestAdmitReadOnlyRootFilesystem(t *testing.T) {
createPodWithRORFS := func(rorfs bool) *kapi.Pod {
pod := goodPod()
pod.Spec.Containers[0].SecurityContext.ReadOnlyRootFilesystem = &rorfs
return pod
}
noRORFS := restrictivePSP()
noRORFS.Name = "no-rorfs"
noRORFS.Spec.ReadOnlyRootFilesystem = false
rorfs := restrictivePSP()
rorfs.Name = "rorfs"
rorfs.Spec.ReadOnlyRootFilesystem = true
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedRORFS bool
expectedPSP string
}{
"no-rorfs allows pod request with rorfs": {
pod: createPodWithRORFS(true),
psps: []*extensions.PodSecurityPolicy{noRORFS},
shouldPass: true,
expectedRORFS: true,
expectedPSP: noRORFS.Name,
},
"no-rorfs allows pod request without rorfs": {
pod: createPodWithRORFS(false),
psps: []*extensions.PodSecurityPolicy{noRORFS},
shouldPass: true,
expectedRORFS: false,
expectedPSP: noRORFS.Name,
},
"rorfs rejects pod request without rorfs": {
pod: createPodWithRORFS(false),
psps: []*extensions.PodSecurityPolicy{rorfs},
shouldPass: false,
},
"rorfs defaults nil pod request": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{rorfs},
shouldPass: true,
expectedRORFS: true,
expectedPSP: rorfs.Name,
},
"rorfs accepts pod request with rorfs": {
pod: createPodWithRORFS(true),
psps: []*extensions.PodSecurityPolicy{rorfs},
shouldPass: true,
expectedRORFS: true,
expectedPSP: rorfs.Name,
},
}
for k, v := range tests {
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
if v.pod.Spec.Containers[0].SecurityContext.ReadOnlyRootFilesystem == nil ||
*v.pod.Spec.Containers[0].SecurityContext.ReadOnlyRootFilesystem != v.expectedRORFS {
t.Errorf("%s expected ReadOnlyRootFilesystem to be %t but found %#v", k, v.expectedRORFS, v.pod.Spec.Containers[0].SecurityContext.ReadOnlyRootFilesystem)
}
}
}
}
func TestAdmitSysctls(t *testing.T) {
podWithSysctls := func(safeSysctls []string, unsafeSysctls []string) *kapi.Pod {
pod := goodPod()
dummySysctls := func(names []string) []kapi.Sysctl {
sysctls := make([]kapi.Sysctl, len(names))
for i, n := range names {
sysctls[i].Name = n
sysctls[i].Value = "dummy"
}
return sysctls
}
pod.Annotations[kapi.SysctlsPodAnnotationKey] = helper.PodAnnotationsFromSysctls(dummySysctls(safeSysctls))
pod.Annotations[kapi.UnsafeSysctlsPodAnnotationKey] = helper.PodAnnotationsFromSysctls(dummySysctls(unsafeSysctls))
return pod
}
noSysctls := restrictivePSP()
noSysctls.Name = "no sysctls"
emptySysctls := restrictivePSP()
emptySysctls.Name = "empty sysctls"
emptySysctls.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = ""
mixedSysctls := restrictivePSP()
mixedSysctls.Name = "wildcard sysctls"
mixedSysctls.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = "a.*,b.*,c,d.e.f"
aSysctl := restrictivePSP()
aSysctl.Name = "a sysctl"
aSysctl.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = "a"
bSysctl := restrictivePSP()
bSysctl.Name = "b sysctl"
bSysctl.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = "b"
cSysctl := restrictivePSP()
cSysctl.Name = "c sysctl"
cSysctl.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = "c"
catchallSysctls := restrictivePSP()
catchallSysctls.Name = "catchall sysctl"
catchallSysctls.Annotations[extensions.SysctlsPodSecurityPolicyAnnotationKey] = "*"
tests := map[string]struct {
pod *kapi.Pod
psps []*extensions.PodSecurityPolicy
shouldPass bool
expectedPSP string
}{
"pod without unsafe sysctls request allowed under noSysctls PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{noSysctls},
shouldPass: true,
expectedPSP: noSysctls.Name,
},
"pod without any sysctls request allowed under emptySysctls PSP": {
pod: goodPod(),
psps: []*extensions.PodSecurityPolicy{emptySysctls},
shouldPass: true,
expectedPSP: emptySysctls.Name,
},
"pod with safe sysctls request allowed under noSysctls PSP": {
pod: podWithSysctls([]string{"a", "b"}, []string{}),
psps: []*extensions.PodSecurityPolicy{noSysctls},
shouldPass: true,
expectedPSP: noSysctls.Name,
},
"pod with unsafe sysctls request allowed under noSysctls PSP": {
pod: podWithSysctls([]string{}, []string{"a", "b"}),
psps: []*extensions.PodSecurityPolicy{noSysctls},
shouldPass: true,
expectedPSP: noSysctls.Name,
},
"pod with safe sysctls request disallowed under emptySysctls PSP": {
pod: podWithSysctls([]string{"a", "b"}, []string{}),
psps: []*extensions.PodSecurityPolicy{emptySysctls},
shouldPass: false,
},
"pod with unsafe sysctls a, b request disallowed under aSysctls SCC": {
pod: podWithSysctls([]string{}, []string{"a", "b"}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: false,
},
"pod with unsafe sysctls b request disallowed under aSysctls SCC": {
pod: podWithSysctls([]string{}, []string{"b"}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: false,
},
"pod with unsafe sysctls a request allowed under aSysctls SCC": {
pod: podWithSysctls([]string{}, []string{"a"}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: true,
expectedPSP: aSysctl.Name,
},
"pod with safe sysctls a, b request disallowed under aSysctls SCC": {
pod: podWithSysctls([]string{"a", "b"}, []string{}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: false,
},
"pod with safe sysctls b request disallowed under aSysctls SCC": {
pod: podWithSysctls([]string{"b"}, []string{}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: false,
},
"pod with safe sysctls a request allowed under aSysctls SCC": {
pod: podWithSysctls([]string{"a"}, []string{}),
psps: []*extensions.PodSecurityPolicy{aSysctl},
shouldPass: true,
expectedPSP: aSysctl.Name,
},
"pod with unsafe sysctls request disallowed under emptySysctls PSP": {
pod: podWithSysctls([]string{}, []string{"a", "b"}),
psps: []*extensions.PodSecurityPolicy{emptySysctls},
shouldPass: false,
},
"pod with matching sysctls request allowed under mixedSysctls PSP": {
pod: podWithSysctls([]string{"a.b", "b.c"}, []string{"c", "d.e.f"}),
psps: []*extensions.PodSecurityPolicy{mixedSysctls},
shouldPass: true,
expectedPSP: mixedSysctls.Name,
},
"pod with not-matching unsafe sysctls request disallowed under mixedSysctls PSP": {
pod: podWithSysctls([]string{"a.b", "b.c", "c", "d.e.f"}, []string{"e"}),
psps: []*extensions.PodSecurityPolicy{mixedSysctls},
shouldPass: false,
},
"pod with not-matching safe sysctls request disallowed under mixedSysctls PSP": {
pod: podWithSysctls([]string{"a.b", "b.c", "c", "d.e.f", "e"}, []string{}),
psps: []*extensions.PodSecurityPolicy{mixedSysctls},
shouldPass: false,
},
"pod with sysctls request allowed under catchallSysctls PSP": {
pod: podWithSysctls([]string{"e"}, []string{"f"}),
psps: []*extensions.PodSecurityPolicy{catchallSysctls},
shouldPass: true,
expectedPSP: catchallSysctls.Name,
},
"pod with sysctls request allowed under catchallSysctls PSP, not under mixedSysctls or emptySysctls PSP": {
pod: podWithSysctls([]string{"e"}, []string{"f"}),
psps: []*extensions.PodSecurityPolicy{mixedSysctls, catchallSysctls, emptySysctls},
shouldPass: true,
expectedPSP: catchallSysctls.Name,
},
"pod with safe c sysctl request allowed under cSysctl PSP, not under aSysctl or bSysctl PSP": {
pod: podWithSysctls([]string{}, []string{"c"}),
psps: []*extensions.PodSecurityPolicy{aSysctl, bSysctl, cSysctl},
shouldPass: true,
expectedPSP: cSysctl.Name,
},
"pod with unsafe c sysctl request allowed under cSysctl PSP, not under aSysctl or bSysctl PSP": {
pod: podWithSysctls([]string{"c"}, []string{}),
psps: []*extensions.PodSecurityPolicy{aSysctl, bSysctl, cSysctl},
shouldPass: true,
expectedPSP: cSysctl.Name,
},
}
for k, v := range tests {
origSafeSysctls, origUnsafeSysctls, err := helper.SysctlsFromPodAnnotations(v.pod.Annotations)
if err != nil {
t.Fatalf("invalid sysctl annotation: %v", err)
}
testPSPAdmit(k, v.psps, v.pod, v.shouldPass, v.expectedPSP, t)
if v.shouldPass {
safeSysctls, unsafeSysctls, _ := helper.SysctlsFromPodAnnotations(v.pod.Annotations)
if !reflect.DeepEqual(safeSysctls, origSafeSysctls) {
t.Errorf("%s: wrong safe sysctls: expected=%v, got=%v", k, origSafeSysctls, safeSysctls)
}
if !reflect.DeepEqual(unsafeSysctls, origUnsafeSysctls) {
t.Errorf("%s: wrong unsafe sysctls: expected=%v, got=%v", k, origSafeSysctls, safeSysctls)
}
}
}
}
func testPSPAdmit(testCaseName string, psps []*extensions.PodSecurityPolicy, pod *kapi.Pod, shouldPass bool, expectedPSP string, t *testing.T) {
informerFactory := informers.NewSharedInformerFactory(nil, controller.NoResyncPeriodFunc())
store := informerFactory.Extensions().InternalVersion().PodSecurityPolicies().Informer().GetStore()
for _, psp := range psps {
store.Add(psp)
}
plugin := NewTestAdmission(informerFactory.Extensions().InternalVersion().PodSecurityPolicies().Lister())
attrs := kadmission.NewAttributesRecord(pod, nil, kapi.Kind("Pod").WithVersion("version"), "namespace", "", kapi.Resource("pods").WithVersion("version"), "", kadmission.Create, &user.DefaultInfo{})
err := plugin.Admit(attrs)
if shouldPass && err != nil {
t.Errorf("%s: expected no errors but received %v", testCaseName, err)
}
if shouldPass && err == nil {
if pod.Annotations[psputil.ValidatedPSPAnnotation] != expectedPSP {
t.Errorf("%s: expected to validate under %s but found %s", testCaseName, expectedPSP, pod.Annotations[psputil.ValidatedPSPAnnotation])
}
}
if !shouldPass && err == nil {
t.Errorf("%s: expected errors but received none", testCaseName)
}
}
func TestAssignSecurityContext(t *testing.T) {
// psp that will deny privileged container requests and has a default value for a field (uid)
psp := restrictivePSP()
provider, err := kpsp.NewSimpleProvider(psp, "namespace", kpsp.NewSimpleStrategyFactory())
if err != nil {
t.Fatalf("failed to create provider: %v", err)
}
createContainer := func(priv bool) kapi.Container {
return kapi.Container{
SecurityContext: &kapi.SecurityContext{
Privileged: &priv,
},
}
}
// these are set up such that the containers always have a nil uid. If the case should not
// validate then the uids should not have been updated by the strategy. If the case should
// validate then uids should be set. This is ensuring that we're hanging on to the old SC
// as we generate/validate and only updating the original container if the entire pod validates
testCases := map[string]struct {
pod *kapi.Pod
shouldValidate bool
expectedUID *int64
}{
"pod and container SC is not changed when invalid": {
pod: &kapi.Pod{
Spec: kapi.PodSpec{
SecurityContext: &kapi.PodSecurityContext{},
Containers: []kapi.Container{createContainer(true)},
},
},
shouldValidate: false,
},
"must validate all containers": {
pod: &kapi.Pod{
Spec: kapi.PodSpec{
// good container and bad container
SecurityContext: &kapi.PodSecurityContext{},
Containers: []kapi.Container{createContainer(false), createContainer(true)},
},
},
shouldValidate: false,
},
"pod validates": {
pod: &kapi.Pod{
Spec: kapi.PodSpec{
SecurityContext: &kapi.PodSecurityContext{},
Containers: []kapi.Container{createContainer(false)},
},
},
shouldValidate: true,
},
}
for k, v := range testCases {
errs := assignSecurityContext(provider, v.pod, nil)
if v.shouldValidate && len(errs) > 0 {
t.Errorf("%s expected to validate but received errors %v", k, errs)
continue
}
if !v.shouldValidate && len(errs) == 0 {
t.Errorf("%s expected validation errors but received none", k)
continue
}
// if we shouldn't have validated ensure that uid is not set on the containers
if !v.shouldValidate {
for _, c := range v.pod.Spec.Containers {
if c.SecurityContext.RunAsUser != nil {
t.Errorf("%s had non-nil UID %d. UID should not be set on test cases that don't validate", k, *c.SecurityContext.RunAsUser)
}
}
}
// if we validated then the pod sc should be updated now with the defaults from the psp
if v.shouldValidate {
for _, c := range v.pod.Spec.Containers {
if *c.SecurityContext.RunAsUser != 999 {
t.Errorf("%s expected uid to be defaulted to 999 but found %v", k, *c.SecurityContext.RunAsUser)
}
}
}
}
}
func TestCreateProvidersFromConstraints(t *testing.T) {
testCases := map[string]struct {
// use a generating function so we can test for non-mutation
psp func() *extensions.PodSecurityPolicy
expectedErr string
}{
"valid psp": {
psp: func() *extensions.PodSecurityPolicy {
return &extensions.PodSecurityPolicy{
ObjectMeta: metav1.ObjectMeta{
Name: "valid psp",
},
Spec: extensions.PodSecurityPolicySpec{
SELinux: extensions.SELinuxStrategyOptions{
Rule: extensions.SELinuxStrategyRunAsAny,
},
RunAsUser: extensions.RunAsUserStrategyOptions{
Rule: extensions.RunAsUserStrategyRunAsAny,
},
FSGroup: extensions.FSGroupStrategyOptions{
Rule: extensions.FSGroupStrategyRunAsAny,
},
SupplementalGroups: extensions.SupplementalGroupsStrategyOptions{
Rule: extensions.SupplementalGroupsStrategyRunAsAny,
},
},
}
},
},
"bad psp strategy options": {
psp: func() *extensions.PodSecurityPolicy {
return &extensions.PodSecurityPolicy{
ObjectMeta: metav1.ObjectMeta{
Name: "bad psp user options",
},
Spec: extensions.PodSecurityPolicySpec{
SELinux: extensions.SELinuxStrategyOptions{
Rule: extensions.SELinuxStrategyRunAsAny,
},
RunAsUser: extensions.RunAsUserStrategyOptions{
Rule: extensions.RunAsUserStrategyMustRunAs,
},
FSGroup: extensions.FSGroupStrategyOptions{
Rule: extensions.FSGroupStrategyRunAsAny,
},
SupplementalGroups: extensions.SupplementalGroupsStrategyOptions{
Rule: extensions.SupplementalGroupsStrategyRunAsAny,
},
},
}
},
expectedErr: "MustRunAsRange requires at least one range",
},
}
for k, v := range testCases {
admit := &podSecurityPolicyPlugin{
Handler: kadmission.NewHandler(kadmission.Create, kadmission.Update),
strategyFactory: kpsp.NewSimpleStrategyFactory(),
}
psp := v.psp()
_, errs := admit.createProvidersFromPolicies([]*extensions.PodSecurityPolicy{psp}, "namespace")
if !reflect.DeepEqual(psp, v.psp()) {
diff := diff.ObjectDiff(psp, v.psp())
t.Errorf("%s createProvidersFromPolicies mutated policy. diff:\n%s", k, diff)
}
if len(v.expectedErr) > 0 && len(errs) != 1 {
t.Errorf("%s expected a single error '%s' but received %v", k, v.expectedErr, errs)
continue
}
if len(v.expectedErr) == 0 && len(errs) != 0 {
t.Errorf("%s did not expect an error but received %v", k, errs)
continue
}
// check that we got the error we expected
if len(v.expectedErr) > 0 {
if !strings.Contains(errs[0].Error(), v.expectedErr) {
t.Errorf("%s expected error '%s' but received %v", k, v.expectedErr, errs[0])
}
}
}
}
func TestGetMatchingPolicies(t *testing.T) {
policyWithName := func(name string) *extensions.PodSecurityPolicy {
p := restrictivePSP()
p.Name = name
return p
}
tests := map[string]struct {
user user.Info
sa user.Info
ns string
expectedPolicies sets.String
inPolicies []*extensions.PodSecurityPolicy
allowed map[string]map[string]map[string]bool
}{
"policy allowed by user": {
user: &user.DefaultInfo{Name: "user"},
sa: &user.DefaultInfo{Name: "sa"},
ns: "test",
allowed: map[string]map[string]map[string]bool{
"user": {
"test": {"policy": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{policyWithName("policy")},
expectedPolicies: sets.NewString("policy"),
},
"policy allowed by sa": {
user: &user.DefaultInfo{Name: "user"},
sa: &user.DefaultInfo{Name: "sa"},
ns: "test",
allowed: map[string]map[string]map[string]bool{
"sa": {
"test": {"policy": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{policyWithName("policy")},
expectedPolicies: sets.NewString("policy"),
},
"no policies allowed": {
user: &user.DefaultInfo{Name: "user"},
sa: &user.DefaultInfo{Name: "sa"},
ns: "test",
allowed: map[string]map[string]map[string]bool{},
inPolicies: []*extensions.PodSecurityPolicy{policyWithName("policy")},
expectedPolicies: sets.NewString(),
},
"multiple policies allowed": {
user: &user.DefaultInfo{Name: "user"},
sa: &user.DefaultInfo{Name: "sa"},
ns: "test",
allowed: map[string]map[string]map[string]bool{
"sa": {
"test": {"policy1": true},
"": {"policy4": true},
"other": {"policy6": true},
},
"user": {
"test": {"policy2": true},
"": {"policy5": true},
"other": {"policy7": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{
policyWithName("policy1"), // allowed by sa
policyWithName("policy2"), // allowed by user
policyWithName("policy3"), // not allowed
policyWithName("policy4"), // allowed by sa at cluster level
policyWithName("policy5"), // allowed by user at cluster level
policyWithName("policy6"), // not allowed in this namespace
policyWithName("policy7"), // not allowed in this namespace
},
expectedPolicies: sets.NewString("policy1", "policy2", "policy4", "policy5"),
},
"policies are not allowed for nil user info": {
user: nil,
sa: &user.DefaultInfo{Name: "sa"},
ns: "test",
allowed: map[string]map[string]map[string]bool{
"sa": {
"test": {"policy1": true},
},
"user": {
"test": {"policy2": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{
policyWithName("policy1"),
policyWithName("policy2"),
policyWithName("policy3"),
},
// only the policies for the sa are allowed when user info is nil
expectedPolicies: sets.NewString("policy1"),
},
"policies are not allowed for nil sa info": {
user: &user.DefaultInfo{Name: "user"},
sa: nil,
ns: "test",
allowed: map[string]map[string]map[string]bool{
"sa": {
"test": {"policy1": true},
},
"user": {
"test": {"policy2": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{
policyWithName("policy1"),
policyWithName("policy2"),
policyWithName("policy3"),
},
// only the policies for the user are allowed when sa info is nil
expectedPolicies: sets.NewString("policy2"),
},
"policies are not allowed for nil sa and user info": {
user: nil,
sa: nil,
ns: "test",
allowed: map[string]map[string]map[string]bool{
"sa": {
"test": {"policy1": true},
},
"user": {
"test": {"policy2": true},
},
},
inPolicies: []*extensions.PodSecurityPolicy{
policyWithName("policy1"),
policyWithName("policy2"),
policyWithName("policy3"),
},
// no policies are allowed if sa and user are both nil
expectedPolicies: sets.NewString(),
},
}
for k, v := range tests {
informerFactory := informers.NewSharedInformerFactory(nil, controller.NoResyncPeriodFunc())
pspInformer := informerFactory.Extensions().InternalVersion().PodSecurityPolicies()
store := pspInformer.Informer().GetStore()
for _, psp := range v.inPolicies {
store.Add(psp)
}
authz := &TestAuthorizer{usernameToNamespaceToAllowedPSPs: v.allowed}
allowedPolicies, err := getMatchingPolicies(pspInformer.Lister(), v.user, v.sa, authz, v.ns)
if err != nil {
t.Errorf("%s got unexpected error %#v", k, err)
continue
}
allowedPolicyNames := sets.NewString()
for _, p := range allowedPolicies {
allowedPolicyNames.Insert(p.Name)
}
if !v.expectedPolicies.Equal(allowedPolicyNames) {
t.Errorf("%s received unexpected policies. Expected %#v but got %#v", k, v.expectedPolicies.List(), allowedPolicyNames.List())
}
}
}
func restrictivePSP() *extensions.PodSecurityPolicy {
return &extensions.PodSecurityPolicy{
ObjectMeta: metav1.ObjectMeta{
Name: "restrictive",
Annotations: map[string]string{},
},
Spec: extensions.PodSecurityPolicySpec{
RunAsUser: extensions.RunAsUserStrategyOptions{
Rule: extensions.RunAsUserStrategyMustRunAs,
Ranges: []extensions.UserIDRange{
{Min: int64(999), Max: int64(999)},
},
},
SELinux: extensions.SELinuxStrategyOptions{
Rule: extensions.SELinuxStrategyMustRunAs,
SELinuxOptions: &kapi.SELinuxOptions{
Level: "s9:z0,z1",
},
},
FSGroup: extensions.FSGroupStrategyOptions{
Rule: extensions.FSGroupStrategyMustRunAs,
Ranges: []extensions.GroupIDRange{
{Min: int64(999), Max: int64(999)},
},
},
SupplementalGroups: extensions.SupplementalGroupsStrategyOptions{
Rule: extensions.SupplementalGroupsStrategyMustRunAs,
Ranges: []extensions.GroupIDRange{
{Min: int64(999), Max: int64(999)},
},
},
},
}
}
func createNamespaceForTest() *kapi.Namespace {
return &kapi.Namespace{
ObjectMeta: metav1.ObjectMeta{
Name: "default",
},
}
}
func createSAForTest() *kapi.ServiceAccount {
return &kapi.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Namespace: "default",
Name: "default",
},
}
}
// goodPod is empty and should not be used directly for testing since we're providing
// two different PSPs. Since no values are specified it would be allowed to match any
// psp when defaults are filled in.
func goodPod() *kapi.Pod {
return &kapi.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{},
},
Spec: kapi.PodSpec{
ServiceAccountName: "default",
SecurityContext: &kapi.PodSecurityContext{},
Containers: []kapi.Container{
{
Name: defaultContainerName,
SecurityContext: &kapi.SecurityContext{},
},
},
},
}
}
func userIDPtr(i int) *int64 {
userID := int64(i)
return &userID
}
func groupIDPtr(i int) *int64 {
groupID := int64(i)
return &groupID
}