mirror of
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531 lines
23 KiB
Go
531 lines
23 KiB
Go
/*
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Copyright 2016 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 validation
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import (
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"fmt"
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"path/filepath"
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"regexp"
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"strings"
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apimachineryvalidation "k8s.io/apimachinery/pkg/api/validation"
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unversionedvalidation "k8s.io/apimachinery/pkg/apis/meta/v1/validation"
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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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appsvalidation "k8s.io/kubernetes/pkg/apis/apps/validation"
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core "k8s.io/kubernetes/pkg/apis/core"
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apivalidation "k8s.io/kubernetes/pkg/apis/core/validation"
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"k8s.io/kubernetes/pkg/apis/policy"
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"k8s.io/kubernetes/pkg/security/apparmor"
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"k8s.io/kubernetes/pkg/security/podsecuritypolicy/seccomp"
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psputil "k8s.io/kubernetes/pkg/security/podsecuritypolicy/util"
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)
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// ValidatePodDisruptionBudget validates a PodDisruptionBudget and returns an ErrorList
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// with any errors.
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func ValidatePodDisruptionBudget(pdb *policy.PodDisruptionBudget) field.ErrorList {
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allErrs := ValidatePodDisruptionBudgetSpec(pdb.Spec, field.NewPath("spec"))
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allErrs = append(allErrs, ValidatePodDisruptionBudgetStatus(pdb.Status, field.NewPath("status"))...)
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return allErrs
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}
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// ValidatePodDisruptionBudgetSpec validates a PodDisruptionBudgetSpec and returns an ErrorList
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// with any errors.
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func ValidatePodDisruptionBudgetSpec(spec policy.PodDisruptionBudgetSpec, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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if spec.MinAvailable != nil && spec.MaxUnavailable != nil {
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allErrs = append(allErrs, field.Invalid(fldPath, spec, "minAvailable and maxUnavailable cannot be both set"))
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}
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if spec.MinAvailable != nil {
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allErrs = append(allErrs, appsvalidation.ValidatePositiveIntOrPercent(*spec.MinAvailable, fldPath.Child("minAvailable"))...)
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allErrs = append(allErrs, appsvalidation.IsNotMoreThan100Percent(*spec.MinAvailable, fldPath.Child("minAvailable"))...)
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}
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if spec.MaxUnavailable != nil {
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allErrs = append(allErrs, appsvalidation.ValidatePositiveIntOrPercent(*spec.MaxUnavailable, fldPath.Child("maxUnavailable"))...)
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allErrs = append(allErrs, appsvalidation.IsNotMoreThan100Percent(*spec.MaxUnavailable, fldPath.Child("maxUnavailable"))...)
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}
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allErrs = append(allErrs, unversionedvalidation.ValidateLabelSelector(spec.Selector, fldPath.Child("selector"))...)
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return allErrs
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}
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// ValidatePodDisruptionBudgetStatus validates a PodDisruptionBudgetStatus and returns an ErrorList
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// with any errors.
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func ValidatePodDisruptionBudgetStatus(status policy.PodDisruptionBudgetStatus, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.DisruptionsAllowed), fldPath.Child("disruptionsAllowed"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.CurrentHealthy), fldPath.Child("currentHealthy"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.DesiredHealthy), fldPath.Child("desiredHealthy"))...)
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allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(int64(status.ExpectedPods), fldPath.Child("expectedPods"))...)
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return allErrs
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}
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// ValidatePodSecurityPolicyName can be used to check whether the given
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// pod security policy name is valid.
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// Prefix indicates this name will be used as part of generation, in which case
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// trailing dashes are allowed.
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var ValidatePodSecurityPolicyName = apimachineryvalidation.NameIsDNSSubdomain
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// ValidatePodSecurityPolicy validates a PodSecurityPolicy and returns an ErrorList
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// with any errors.
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func ValidatePodSecurityPolicy(psp *policy.PodSecurityPolicy) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&psp.ObjectMeta, false, ValidatePodSecurityPolicyName, field.NewPath("metadata"))...)
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allErrs = append(allErrs, ValidatePodSecurityPolicySpecificAnnotations(psp.Annotations, field.NewPath("metadata").Child("annotations"))...)
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allErrs = append(allErrs, ValidatePodSecurityPolicySpec(&psp.Spec, field.NewPath("spec"))...)
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return allErrs
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}
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// ValidatePodSecurityPolicySpec validates a PodSecurityPolicySpec and returns an ErrorList
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// with any errors.
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func ValidatePodSecurityPolicySpec(spec *policy.PodSecurityPolicySpec, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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allErrs = append(allErrs, validatePSPRunAsUser(fldPath.Child("runAsUser"), &spec.RunAsUser)...)
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allErrs = append(allErrs, validatePSPRunAsGroup(fldPath.Child("runAsGroup"), spec.RunAsGroup)...)
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allErrs = append(allErrs, validatePSPSELinux(fldPath.Child("seLinux"), &spec.SELinux)...)
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allErrs = append(allErrs, validatePSPSupplementalGroup(fldPath.Child("supplementalGroups"), &spec.SupplementalGroups)...)
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allErrs = append(allErrs, validatePSPFSGroup(fldPath.Child("fsGroup"), &spec.FSGroup)...)
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allErrs = append(allErrs, validatePodSecurityPolicyVolumes(fldPath, spec.Volumes)...)
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if len(spec.RequiredDropCapabilities) > 0 && hasCap(policy.AllowAllCapabilities, spec.AllowedCapabilities) {
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allErrs = append(allErrs, field.Invalid(field.NewPath("requiredDropCapabilities"), spec.RequiredDropCapabilities,
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"must be empty when all capabilities are allowed by a wildcard"))
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}
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allErrs = append(allErrs, validatePSPCapsAgainstDrops(spec.RequiredDropCapabilities, spec.DefaultAddCapabilities, field.NewPath("defaultAddCapabilities"))...)
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allErrs = append(allErrs, validatePSPCapsAgainstDrops(spec.RequiredDropCapabilities, spec.AllowedCapabilities, field.NewPath("allowedCapabilities"))...)
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allErrs = append(allErrs, validatePSPDefaultAllowPrivilegeEscalation(fldPath.Child("defaultAllowPrivilegeEscalation"), spec.DefaultAllowPrivilegeEscalation, spec.AllowPrivilegeEscalation)...)
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allErrs = append(allErrs, validatePSPAllowedProcMountTypes(fldPath.Child("allowedProcMountTypes"), spec.AllowedProcMountTypes)...)
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allErrs = append(allErrs, validatePSPAllowedHostPaths(fldPath.Child("allowedHostPaths"), spec.AllowedHostPaths)...)
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allErrs = append(allErrs, validatePSPAllowedFlexVolumes(fldPath.Child("allowedFlexVolumes"), spec.AllowedFlexVolumes)...)
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allErrs = append(allErrs, validatePSPAllowedCSIDrivers(fldPath.Child("allowedCSIDrivers"), spec.AllowedCSIDrivers)...)
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allErrs = append(allErrs, validatePodSecurityPolicySysctls(fldPath.Child("allowedUnsafeSysctls"), spec.AllowedUnsafeSysctls)...)
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allErrs = append(allErrs, validatePodSecurityPolicySysctls(fldPath.Child("forbiddenSysctls"), spec.ForbiddenSysctls)...)
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allErrs = append(allErrs, validatePodSecurityPolicySysctlListsDoNotOverlap(fldPath.Child("allowedUnsafeSysctls"), fldPath.Child("forbiddenSysctls"), spec.AllowedUnsafeSysctls, spec.ForbiddenSysctls)...)
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allErrs = append(allErrs, validateRuntimeClassStrategy(fldPath.Child("runtimeClass"), spec.RuntimeClass)...)
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return allErrs
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}
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// ValidatePodSecurityPolicySpecificAnnotations validates annotations and returns an ErrorList
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// with any errors.
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func ValidatePodSecurityPolicySpecificAnnotations(annotations map[string]string, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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if p := annotations[apparmor.DefaultProfileAnnotationKey]; p != "" {
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if err := apparmor.ValidateProfileFormat(p); err != nil {
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allErrs = append(allErrs, field.Invalid(fldPath.Key(apparmor.DefaultProfileAnnotationKey), p, err.Error()))
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}
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}
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if allowed := annotations[apparmor.AllowedProfilesAnnotationKey]; allowed != "" {
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for _, p := range strings.Split(allowed, ",") {
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if err := apparmor.ValidateProfileFormat(p); err != nil {
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allErrs = append(allErrs, field.Invalid(fldPath.Key(apparmor.AllowedProfilesAnnotationKey), allowed, err.Error()))
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}
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}
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}
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if p := annotations[seccomp.DefaultProfileAnnotationKey]; p != "" {
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allErrs = append(allErrs, apivalidation.ValidateSeccompProfile(p, fldPath.Key(seccomp.DefaultProfileAnnotationKey))...)
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}
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if allowed := annotations[seccomp.AllowedProfilesAnnotationKey]; allowed != "" {
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for _, p := range strings.Split(allowed, ",") {
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if p == seccomp.AllowAny {
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continue
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}
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allErrs = append(allErrs, apivalidation.ValidateSeccompProfile(p, fldPath.Key(seccomp.AllowedProfilesAnnotationKey))...)
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}
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}
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return allErrs
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}
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// validatePSPAllowedHostPaths makes sure all allowed host paths follow:
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// 1. path prefix is required
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// 2. path prefix does not have any element which is ".."
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func validatePSPAllowedHostPaths(fldPath *field.Path, allowedHostPaths []policy.AllowedHostPath) field.ErrorList {
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allErrs := field.ErrorList{}
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for i, target := range allowedHostPaths {
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if target.PathPrefix == "" {
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allErrs = append(allErrs, field.Required(fldPath.Index(i), "is required"))
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break
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}
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parts := strings.Split(filepath.ToSlash(target.PathPrefix), "/")
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for _, item := range parts {
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if item == ".." {
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allErrs = append(allErrs, field.Invalid(fldPath.Index(i), target.PathPrefix, "must not contain '..'"))
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break // even for `../../..`, one error is sufficient to make the point
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}
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}
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}
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return allErrs
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}
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func validatePSPAllowedFlexVolumes(fldPath *field.Path, flexVolumes []policy.AllowedFlexVolume) field.ErrorList {
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allErrs := field.ErrorList{}
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if len(flexVolumes) > 0 {
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for idx, fv := range flexVolumes {
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if len(fv.Driver) == 0 {
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allErrs = append(allErrs, field.Required(fldPath.Child("allowedFlexVolumes").Index(idx).Child("driver"),
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"must specify a driver"))
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}
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}
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}
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return allErrs
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}
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func validatePSPAllowedCSIDrivers(fldPath *field.Path, csiDrivers []policy.AllowedCSIDriver) field.ErrorList {
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allErrs := field.ErrorList{}
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if len(csiDrivers) > 0 {
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for idx, csiDriver := range csiDrivers {
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fieldPath := fldPath.Child("allowedCSIDriver").Index(idx).Child("name")
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allErrs = append(allErrs, apivalidation.ValidateCSIDriverName(csiDriver.Name, fieldPath)...)
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}
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}
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return allErrs
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}
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// validatePSPSELinux validates the SELinux fields of PodSecurityPolicy.
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func validatePSPSELinux(fldPath *field.Path, seLinux *policy.SELinuxStrategyOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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// ensure the selinux strategy has a valid rule
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supportedSELinuxRules := sets.NewString(
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string(policy.SELinuxStrategyMustRunAs),
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string(policy.SELinuxStrategyRunAsAny),
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)
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if !supportedSELinuxRules.Has(string(seLinux.Rule)) {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("rule"), seLinux.Rule, supportedSELinuxRules.List()))
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}
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return allErrs
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}
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// validatePSPRunAsUser validates the RunAsUser fields of PodSecurityPolicy.
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func validatePSPRunAsUser(fldPath *field.Path, runAsUser *policy.RunAsUserStrategyOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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// ensure the user strategy has a valid rule
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supportedRunAsUserRules := sets.NewString(
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string(policy.RunAsUserStrategyMustRunAs),
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string(policy.RunAsUserStrategyMustRunAsNonRoot),
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string(policy.RunAsUserStrategyRunAsAny),
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)
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if !supportedRunAsUserRules.Has(string(runAsUser.Rule)) {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("rule"), runAsUser.Rule, supportedRunAsUserRules.List()))
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}
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// validate range settings
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for idx, rng := range runAsUser.Ranges {
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allErrs = append(allErrs, validateUserIDRange(fldPath.Child("ranges").Index(idx), rng)...)
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}
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return allErrs
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}
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// validatePSPRunAsGroup validates the RunAsGroup fields of PodSecurityPolicy.
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func validatePSPRunAsGroup(fldPath *field.Path, runAsGroup *policy.RunAsGroupStrategyOptions) field.ErrorList {
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var allErrs field.ErrorList
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if runAsGroup == nil {
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return allErrs
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}
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switch runAsGroup.Rule {
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case policy.RunAsGroupStrategyRunAsAny:
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if len(runAsGroup.Ranges) != 0 {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("ranges"), runAsGroup.Ranges, "Ranges must be empty"))
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}
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case policy.RunAsGroupStrategyMustRunAs, policy.RunAsGroupStrategyMayRunAs:
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if len(runAsGroup.Ranges) == 0 {
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allErrs = append(allErrs, field.Invalid(fldPath.Child("ranges"), runAsGroup.Ranges, "must provide at least one range"))
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}
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// validate range settings
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for idx, rng := range runAsGroup.Ranges {
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allErrs = append(allErrs, validateGroupIDRange(fldPath.Child("ranges").Index(idx), rng)...)
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}
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default:
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supportedRunAsGroupRules := []string{
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string(policy.RunAsGroupStrategyMustRunAs),
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string(policy.RunAsGroupStrategyRunAsAny),
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string(policy.RunAsGroupStrategyMayRunAs),
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}
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("rule"), runAsGroup.Rule, supportedRunAsGroupRules))
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}
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return allErrs
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}
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// validatePSPFSGroup validates the FSGroupStrategyOptions fields of the PodSecurityPolicy.
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func validatePSPFSGroup(fldPath *field.Path, groupOptions *policy.FSGroupStrategyOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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supportedRules := sets.NewString(
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string(policy.FSGroupStrategyMustRunAs),
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string(policy.FSGroupStrategyMayRunAs),
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string(policy.FSGroupStrategyRunAsAny),
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)
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if !supportedRules.Has(string(groupOptions.Rule)) {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("rule"), groupOptions.Rule, supportedRules.List()))
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}
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for idx, rng := range groupOptions.Ranges {
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allErrs = append(allErrs, validateGroupIDRange(fldPath.Child("ranges").Index(idx), rng)...)
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}
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return allErrs
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}
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// validatePSPSupplementalGroup validates the SupplementalGroupsStrategyOptions fields of the PodSecurityPolicy.
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func validatePSPSupplementalGroup(fldPath *field.Path, groupOptions *policy.SupplementalGroupsStrategyOptions) field.ErrorList {
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allErrs := field.ErrorList{}
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supportedRules := sets.NewString(
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string(policy.SupplementalGroupsStrategyRunAsAny),
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string(policy.SupplementalGroupsStrategyMayRunAs),
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string(policy.SupplementalGroupsStrategyMustRunAs),
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)
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if !supportedRules.Has(string(groupOptions.Rule)) {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("rule"), groupOptions.Rule, supportedRules.List()))
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}
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for idx, rng := range groupOptions.Ranges {
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allErrs = append(allErrs, validateGroupIDRange(fldPath.Child("ranges").Index(idx), rng)...)
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}
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return allErrs
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}
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// validatePodSecurityPolicyVolumes validates the volume fields of PodSecurityPolicy.
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func validatePodSecurityPolicyVolumes(fldPath *field.Path, volumes []policy.FSType) field.ErrorList {
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allErrs := field.ErrorList{}
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allowed := psputil.GetAllFSTypesAsSet()
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// add in the * value since that is a pseudo type that is not included by default
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allowed.Insert(string(policy.All))
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for _, v := range volumes {
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if !allowed.Has(string(v)) {
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allErrs = append(allErrs, field.NotSupported(fldPath.Child("volumes"), v, allowed.List()))
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}
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}
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return allErrs
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}
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// validatePSPDefaultAllowPrivilegeEscalation validates the DefaultAllowPrivilegeEscalation field against the AllowPrivilegeEscalation field of a PodSecurityPolicy.
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func validatePSPDefaultAllowPrivilegeEscalation(fldPath *field.Path, defaultAllowPrivilegeEscalation *bool, allowPrivilegeEscalation bool) field.ErrorList {
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allErrs := field.ErrorList{}
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if defaultAllowPrivilegeEscalation != nil && *defaultAllowPrivilegeEscalation && !allowPrivilegeEscalation {
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allErrs = append(allErrs, field.Invalid(fldPath, defaultAllowPrivilegeEscalation, "Cannot set DefaultAllowPrivilegeEscalation to true without also setting AllowPrivilegeEscalation to true"))
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}
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return allErrs
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}
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// validatePSPAllowedProcMountTypes validates the DefaultAllowPrivilegeEscalation field against the AllowPrivilegeEscalation field of a PodSecurityPolicy.
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func validatePSPAllowedProcMountTypes(fldPath *field.Path, allowedProcMountTypes []core.ProcMountType) field.ErrorList {
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allErrs := field.ErrorList{}
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for i, procMountType := range allowedProcMountTypes {
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if err := apivalidation.ValidateProcMountType(fldPath.Index(i), procMountType); err != nil {
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allErrs = append(allErrs, err)
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}
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}
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return allErrs
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}
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const sysctlPatternSegmentFmt string = "([a-z0-9][-_a-z0-9]*)?[a-z0-9*]"
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// SysctlPatternFmt is a regex used for matching valid sysctl patterns.
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const SysctlPatternFmt string = "(" + apivalidation.SysctlSegmentFmt + "\\.)*" + sysctlPatternSegmentFmt
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var sysctlPatternRegexp = regexp.MustCompile("^" + SysctlPatternFmt + "$")
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// IsValidSysctlPattern checks if name is a valid sysctl pattern.
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func IsValidSysctlPattern(name string) bool {
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if len(name) > apivalidation.SysctlMaxLength {
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return false
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}
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return sysctlPatternRegexp.MatchString(name)
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}
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func validatePodSecurityPolicySysctlListsDoNotOverlap(allowedSysctlsFldPath, forbiddenSysctlsFldPath *field.Path, allowedUnsafeSysctls, forbiddenSysctls []string) field.ErrorList {
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allErrs := field.ErrorList{}
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for i, allowedSysctl := range allowedUnsafeSysctls {
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isAllowedSysctlPattern := false
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allowedSysctlPrefix := ""
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if strings.HasSuffix(allowedSysctl, "*") {
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isAllowedSysctlPattern = true
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allowedSysctlPrefix = strings.TrimSuffix(allowedSysctl, "*")
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}
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for j, forbiddenSysctl := range forbiddenSysctls {
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isForbiddenSysctlPattern := false
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forbiddenSysctlPrefix := ""
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if strings.HasSuffix(forbiddenSysctl, "*") {
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isForbiddenSysctlPattern = true
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forbiddenSysctlPrefix = strings.TrimSuffix(forbiddenSysctl, "*")
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}
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switch {
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case isAllowedSysctlPattern && isForbiddenSysctlPattern:
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if strings.HasPrefix(allowedSysctlPrefix, forbiddenSysctlPrefix) {
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allErrs = append(allErrs, field.Invalid(allowedSysctlsFldPath.Index(i), allowedUnsafeSysctls[i], fmt.Sprintf("sysctl overlaps with %v", forbiddenSysctl)))
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} else if strings.HasPrefix(forbiddenSysctlPrefix, allowedSysctlPrefix) {
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allErrs = append(allErrs, field.Invalid(forbiddenSysctlsFldPath.Index(j), forbiddenSysctls[j], fmt.Sprintf("sysctl overlaps with %v", allowedSysctl)))
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}
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case isAllowedSysctlPattern:
|
|
if strings.HasPrefix(forbiddenSysctl, allowedSysctlPrefix) {
|
|
allErrs = append(allErrs, field.Invalid(forbiddenSysctlsFldPath.Index(j), forbiddenSysctls[j], fmt.Sprintf("sysctl overlaps with %v", allowedSysctl)))
|
|
}
|
|
case isForbiddenSysctlPattern:
|
|
if strings.HasPrefix(allowedSysctl, forbiddenSysctlPrefix) {
|
|
allErrs = append(allErrs, field.Invalid(allowedSysctlsFldPath.Index(i), allowedUnsafeSysctls[i], fmt.Sprintf("sysctl overlaps with %v", forbiddenSysctl)))
|
|
}
|
|
default:
|
|
if allowedSysctl == forbiddenSysctl {
|
|
allErrs = append(allErrs, field.Invalid(allowedSysctlsFldPath.Index(i), allowedUnsafeSysctls[i], fmt.Sprintf("sysctl overlaps with %v", forbiddenSysctl)))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return allErrs
|
|
}
|
|
|
|
// validatePodSecurityPolicySysctls validates the sysctls fields of PodSecurityPolicy.
|
|
func validatePodSecurityPolicySysctls(fldPath *field.Path, sysctls []string) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
|
|
if len(sysctls) == 0 {
|
|
return allErrs
|
|
}
|
|
|
|
coversAll := false
|
|
for i, s := range sysctls {
|
|
if len(s) == 0 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Index(i), sysctls[i], fmt.Sprintf("empty sysctl not allowed")))
|
|
} else if !IsValidSysctlPattern(string(s)) {
|
|
allErrs = append(
|
|
allErrs,
|
|
field.Invalid(fldPath.Index(i), sysctls[i], fmt.Sprintf("must have at most %d characters and match regex %s",
|
|
apivalidation.SysctlMaxLength,
|
|
SysctlPatternFmt,
|
|
)),
|
|
)
|
|
} else if s[0] == '*' {
|
|
coversAll = true
|
|
}
|
|
}
|
|
|
|
if coversAll && len(sysctls) > 1 {
|
|
allErrs = append(allErrs, field.Forbidden(fldPath.Child("items"), fmt.Sprintf("if '*' is present, must not specify other sysctls")))
|
|
}
|
|
|
|
return allErrs
|
|
}
|
|
|
|
func validateUserIDRange(fldPath *field.Path, rng policy.IDRange) field.ErrorList {
|
|
return validateIDRanges(fldPath, rng.Min, rng.Max)
|
|
}
|
|
|
|
func validateGroupIDRange(fldPath *field.Path, rng policy.IDRange) field.ErrorList {
|
|
return validateIDRanges(fldPath, rng.Min, rng.Max)
|
|
}
|
|
|
|
// validateIDRanges ensures the range is valid.
|
|
func validateIDRanges(fldPath *field.Path, min, max int64) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
|
|
// if 0 <= Min <= Max then we do not need to validate max. It is always greater than or
|
|
// equal to 0 and Min.
|
|
if min < 0 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("min"), min, "min cannot be negative"))
|
|
}
|
|
if max < 0 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("max"), max, "max cannot be negative"))
|
|
}
|
|
if min > max {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("min"), min, "min cannot be greater than max"))
|
|
}
|
|
|
|
return allErrs
|
|
}
|
|
|
|
// validatePSPCapsAgainstDrops ensures an allowed cap is not listed in the required drops.
|
|
func validatePSPCapsAgainstDrops(requiredDrops []core.Capability, capsToCheck []core.Capability, fldPath *field.Path) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
if requiredDrops == nil {
|
|
return allErrs
|
|
}
|
|
for _, cap := range capsToCheck {
|
|
if hasCap(cap, requiredDrops) {
|
|
allErrs = append(allErrs, field.Invalid(fldPath, cap,
|
|
fmt.Sprintf("capability is listed in %s and requiredDropCapabilities", fldPath.String())))
|
|
}
|
|
}
|
|
return allErrs
|
|
}
|
|
|
|
// validateRuntimeClassStrategy ensures all the RuntimeClass restrictions are valid.
|
|
func validateRuntimeClassStrategy(fldPath *field.Path, rc *policy.RuntimeClassStrategyOptions) field.ErrorList {
|
|
if rc == nil {
|
|
return nil
|
|
}
|
|
|
|
var allErrs field.ErrorList
|
|
|
|
allowed := map[string]bool{}
|
|
for i, name := range rc.AllowedRuntimeClassNames {
|
|
if name != policy.AllowAllRuntimeClassNames {
|
|
allErrs = append(allErrs, apivalidation.ValidateRuntimeClassName(name, fldPath.Child("allowedRuntimeClassNames").Index(i))...)
|
|
}
|
|
if allowed[name] {
|
|
allErrs = append(allErrs, field.Duplicate(fldPath.Child("allowedRuntimeClassNames").Index(i), name))
|
|
}
|
|
allowed[name] = true
|
|
}
|
|
|
|
if rc.DefaultRuntimeClassName != nil {
|
|
allErrs = append(allErrs, apivalidation.ValidateRuntimeClassName(*rc.DefaultRuntimeClassName, fldPath.Child("defaultRuntimeClassName"))...)
|
|
if !allowed[*rc.DefaultRuntimeClassName] && !allowed[policy.AllowAllRuntimeClassNames] {
|
|
allErrs = append(allErrs, field.Required(fldPath.Child("allowedRuntimeClassNames"),
|
|
fmt.Sprintf("default %q must be allowed", *rc.DefaultRuntimeClassName)))
|
|
}
|
|
}
|
|
|
|
if allowed[policy.AllowAllRuntimeClassNames] && len(rc.AllowedRuntimeClassNames) > 1 {
|
|
allErrs = append(allErrs, field.Invalid(fldPath.Child("allowedRuntimeClassNames"), rc.AllowedRuntimeClassNames, "if '*' is present, must not specify other RuntimeClass names"))
|
|
}
|
|
|
|
return allErrs
|
|
}
|
|
|
|
// ValidatePodSecurityPolicyUpdate validates a PSP for updates.
|
|
func ValidatePodSecurityPolicyUpdate(old *policy.PodSecurityPolicy, new *policy.PodSecurityPolicy) field.ErrorList {
|
|
allErrs := field.ErrorList{}
|
|
allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&new.ObjectMeta, &old.ObjectMeta, field.NewPath("metadata"))...)
|
|
allErrs = append(allErrs, ValidatePodSecurityPolicySpecificAnnotations(new.Annotations, field.NewPath("metadata").Child("annotations"))...)
|
|
allErrs = append(allErrs, ValidatePodSecurityPolicySpec(&new.Spec, field.NewPath("spec"))...)
|
|
return allErrs
|
|
}
|
|
|
|
// hasCap checks for needle in haystack.
|
|
func hasCap(needle core.Capability, haystack []core.Capability) bool {
|
|
for _, c := range haystack {
|
|
if needle == c {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|