74f5ed6b17
UserInfo contains a uid field alongside groups, username and extra. This change makes it possible to pass a UID through as an impersonation header like you can with Impersonate-Group, Impersonate-User and Impersonate-Extra. This PR contains: * Changes to impersonation.go to parse the Impersonate-Uid header and authorize uid impersonation * Unit tests for allowed and disallowed impersonation cases * An integration test that creates a CertificateSigningRequest using impersonation, and ensures that the API server populates the correct impersonated spec.uid upon creation.
122 lines
3.5 KiB
Go
122 lines
3.5 KiB
Go
/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package authutil
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import (
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"context"
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"strings"
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"testing"
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"time"
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authorizationv1 "k8s.io/api/authorization/v1"
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rbacv1 "k8s.io/api/rbac/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/wait"
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clientset "k8s.io/client-go/kubernetes"
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authorizationv1client "k8s.io/client-go/kubernetes/typed/authorization/v1"
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)
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// WaitForNamedAuthorizationUpdate checks if the given user can perform the named verb and action on the named resource.
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// Copied from k8s.io/kubernetes/test/e2e/framework/auth.
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func WaitForNamedAuthorizationUpdate(t *testing.T, ctx context.Context, c authorizationv1client.SubjectAccessReviewsGetter, user, namespace, verb, resourceName string, resource schema.GroupResource, allowed bool) {
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t.Helper()
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review := &authorizationv1.SubjectAccessReview{
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Spec: authorizationv1.SubjectAccessReviewSpec{
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ResourceAttributes: &authorizationv1.ResourceAttributes{
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Group: resource.Group,
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Verb: verb,
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Resource: resource.Resource,
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Namespace: namespace,
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Name: resourceName,
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},
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User: user,
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},
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}
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if err := wait.Poll(200*time.Millisecond, wait.ForeverTestTimeout, func() (bool, error) {
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response, err := c.SubjectAccessReviews().Create(ctx, review, metav1.CreateOptions{})
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if err != nil {
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return false, err
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}
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if response.Status.Allowed != allowed {
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return false, nil
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}
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return true, nil
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}); err != nil {
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t.Fatal(err)
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}
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}
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func GrantUserAuthorization(t *testing.T, ctx context.Context, adminClient clientset.Interface, username string, rule rbacv1.PolicyRule) {
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t.Helper()
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cr, err := adminClient.RbacV1().ClusterRoles().Create(ctx, &rbacv1.ClusterRole{
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ObjectMeta: metav1.ObjectMeta{GenerateName: strings.Replace(t.Name(), "/", "--", -1)},
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Rules: []rbacv1.PolicyRule{
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rule,
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},
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}, metav1.CreateOptions{})
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if err != nil {
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t.Fatal(err)
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}
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t.Cleanup(func() {
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_ = adminClient.RbacV1().ClusterRoles().Delete(ctx, cr.Name, metav1.DeleteOptions{})
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})
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crb, err := adminClient.RbacV1().ClusterRoleBindings().Create(ctx, &rbacv1.ClusterRoleBinding{
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ObjectMeta: metav1.ObjectMeta{GenerateName: strings.Replace(t.Name(), "/", "--", -1)},
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Subjects: []rbacv1.Subject{
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{
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Kind: rbacv1.UserKind,
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APIGroup: rbacv1.GroupName,
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Name: username,
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Namespace: "",
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},
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},
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RoleRef: rbacv1.RoleRef{
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APIGroup: rbacv1.GroupName,
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Kind: "ClusterRole",
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Name: cr.Name,
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},
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}, metav1.CreateOptions{})
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if err != nil {
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t.Fatal(err)
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}
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t.Cleanup(func() {
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_ = adminClient.RbacV1().ClusterRoleBindings().Delete(ctx, crb.Name, metav1.DeleteOptions{})
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})
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var resourceName string
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if len(rule.ResourceNames) > 0 {
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resourceName = rule.ResourceNames[0]
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}
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WaitForNamedAuthorizationUpdate(
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t,
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ctx,
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adminClient.AuthorizationV1(),
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username,
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"",
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rule.Verbs[0],
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resourceName,
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schema.GroupResource{Group: rule.APIGroups[0], Resource: rule.Resources[0]},
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true,
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)
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}
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