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Add OIDC integration tests
This commit is contained in:
roman
parent
59592ba463
commit
18f2e9055f
27
test/integration/apiserver/oidc/main_test.go
Normal file
27
test/integration/apiserver/oidc/main_test.go
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@ -0,0 +1,27 @@
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/*
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Copyright 2023 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 oidc
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import (
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"testing"
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"k8s.io/kubernetes/test/integration/framework"
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)
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func TestMain(m *testing.M) {
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framework.EtcdMain(m.Run)
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}
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496
test/integration/apiserver/oidc/oidc_test.go
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496
test/integration/apiserver/oidc/oidc_test.go
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@ -0,0 +1,496 @@
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/*
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Copyright 2023 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 oidc
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import (
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"context"
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"crypto/rand"
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"crypto/rsa"
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"crypto/tls"
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"crypto/x509"
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"encoding/json"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"path/filepath"
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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rbacv1 "k8s.io/api/rbac/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd/api"
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certutil "k8s.io/client-go/util/cert"
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kubeapiserverapptesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
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"k8s.io/kubernetes/pkg/apis/rbac"
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"k8s.io/kubernetes/pkg/kubeapiserver/authorizer/modes"
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"k8s.io/kubernetes/test/integration/framework"
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utilsoidc "k8s.io/kubernetes/test/utils/oidc"
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utilsnet "k8s.io/utils/net"
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)
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const (
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defaultNamespace = "default"
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defaultOIDCClientID = "f403b682-603f-4ec9-b3e4-cf111ef36f7c"
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defaultOIDCClaimedUsername = "john_doe"
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defaultOIDCUsernamePrefix = "k8s-"
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defaultRBACRoleName = "developer-role"
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defaultRBACRoleBindingName = "developer-role-binding"
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defaultStubRefreshToken = "_fake_refresh_token_"
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defaultStubAccessToken = "_fake_access_token_"
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rsaKeyBitSize = 2048
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)
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var (
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defaultRole = &rbacv1.Role{
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TypeMeta: metav1.TypeMeta{APIVersion: "rbac.authorization.k8s.io/v1", Kind: "Role"},
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ObjectMeta: metav1.ObjectMeta{Name: defaultRBACRoleName},
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Rules: []rbacv1.PolicyRule{
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{
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Verbs: []string{"list"},
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Resources: []string{"pods"},
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APIGroups: []string{""},
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ResourceNames: []string{},
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},
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},
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}
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defaultRoleBinding = &rbacv1.RoleBinding{
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TypeMeta: metav1.TypeMeta{APIVersion: "rbac.authorization.k8s.io/v1", Kind: "RoleBinding"},
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ObjectMeta: metav1.ObjectMeta{Name: defaultRBACRoleBindingName},
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Subjects: []rbacv1.Subject{
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{
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APIGroup: rbac.GroupName,
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Kind: rbacv1.UserKind,
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Name: defaultOIDCUsernamePrefix + defaultOIDCClaimedUsername,
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},
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},
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RoleRef: rbacv1.RoleRef{
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APIGroup: rbac.GroupName,
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Kind: "Role",
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Name: defaultRBACRoleName,
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},
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}
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)
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func TestOIDC(t *testing.T) {
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var tests = []struct {
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name string
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configureInfrastructure func(t *testing.T) (
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oidcServer *utilsoidc.TestServer,
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apiServer *kubeapiserverapptesting.TestServer,
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signingPrivateKey *rsa.PrivateKey,
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caCertContent []byte,
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caFilePath string,
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)
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configureOIDCServerBehaviour func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey)
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configureClient func(
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t *testing.T,
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restCfg *rest.Config,
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caCert []byte,
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certPath,
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oidcServerURL,
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oidcServerTokenURL string,
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) *kubernetes.Clientset
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asserErrFn func(t *testing.T, errorToCheck error)
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}{
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{
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name: "ID token is ok",
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configureInfrastructure: configureTestInfrastructure,
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
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idTokenLifetime := time.Second * 1200
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oidcServer.TokenHandler().EXPECT().Token().Times(1).DoAndReturn(utilsoidc.TokenHandlerBehaviourReturningPredefinedJWT(
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t,
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signingPrivateKey,
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oidcServer.URL(),
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defaultOIDCClientID,
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defaultOIDCClaimedUsername,
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defaultStubAccessToken,
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defaultStubRefreshToken,
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time.Now().Add(idTokenLifetime).Unix(),
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))
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},
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configureClient: configureClientFetchingOIDCCredentials,
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asserErrFn: func(t *testing.T, errorToCheck error) {
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assert.NoError(t, errorToCheck)
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},
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},
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{
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name: "ID token is expired",
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configureInfrastructure: configureTestInfrastructure,
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
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configureOIDCServerToReturnExpiredIDToken(t, 2, oidcServer, signingPrivateKey)
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},
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configureClient: configureClientFetchingOIDCCredentials,
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asserErrFn: func(t *testing.T, errorToCheck error) {
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assert.True(t, apierrors.IsUnauthorized(errorToCheck), errorToCheck)
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},
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},
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{
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name: "wrong client ID",
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configureInfrastructure: configureTestInfrastructure,
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, _ *rsa.PrivateKey) {
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oidcServer.TokenHandler().EXPECT().Token().Times(2).Return(utilsoidc.Token{}, utilsoidc.ErrBadClientID)
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},
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configureClient: configureClientWithEmptyIDToken,
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asserErrFn: func(t *testing.T, errorToCheck error) {
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urlError, ok := errorToCheck.(*url.Error)
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require.True(t, ok)
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assert.Equal(
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t,
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"failed to refresh token: oauth2: cannot fetch token: 400 Bad Request\nResponse: client ID is bad\n",
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urlError.Err.Error(),
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)
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},
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},
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{
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name: "client has wrong CA",
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configureInfrastructure: configureTestInfrastructure,
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, _ *rsa.PrivateKey) {},
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configureClient: func(t *testing.T, restCfg *rest.Config, caCert []byte, _, oidcServerURL, oidcServerTokenURL string) *kubernetes.Clientset {
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tempDir := t.TempDir()
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certFilePath := filepath.Join(tempDir, "localhost_127.0.0.1_.crt")
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_, _, wantErr := certutil.GenerateSelfSignedCertKeyWithFixtures("localhost", []net.IP{utilsnet.ParseIPSloppy("127.0.0.1")}, nil, tempDir)
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require.NoError(t, wantErr)
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return configureClientWithEmptyIDToken(t, restCfg, caCert, certFilePath, oidcServerURL, oidcServerTokenURL)
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},
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asserErrFn: func(t *testing.T, errorToCheck error) {
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expectedErr := new(x509.UnknownAuthorityError)
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assert.ErrorAs(t, errorToCheck, expectedErr)
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},
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},
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{
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name: "refresh flow does not return ID Token",
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configureInfrastructure: configureTestInfrastructure,
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
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configureOIDCServerToReturnExpiredIDToken(t, 1, oidcServer, signingPrivateKey)
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oidcServer.TokenHandler().EXPECT().Token().Times(1).Return(utilsoidc.Token{
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IDToken: "",
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AccessToken: defaultStubAccessToken,
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RefreshToken: defaultStubRefreshToken,
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ExpiresIn: time.Now().Add(time.Second * 1200).Unix(),
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}, nil)
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},
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configureClient: configureClientFetchingOIDCCredentials,
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asserErrFn: func(t *testing.T, errorToCheck error) {
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expectedError := new(apierrors.StatusError)
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assert.ErrorAs(t, errorToCheck, &expectedError)
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assert.Equal(
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t,
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`pods is forbidden: User "system:anonymous" cannot list resource "pods" in API group "" in the namespace "default"`,
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errorToCheck.Error(),
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)
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},
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},
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{
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name: "ID token signature can not be verified due to wrong JWKs",
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configureInfrastructure: func(t *testing.T) (
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oidcServer *utilsoidc.TestServer,
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apiServer *kubeapiserverapptesting.TestServer,
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signingPrivateKey *rsa.PrivateKey,
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caCertContent []byte,
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caFilePath string,
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) {
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caCertContent, _, caFilePath, caKeyFilePath := generateCert(t)
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signingPrivateKey, wantErr := rsa.GenerateKey(rand.Reader, rsaKeyBitSize)
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require.NoError(t, wantErr)
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oidcServer = utilsoidc.BuildAndRunTestServer(t, caFilePath, caKeyFilePath)
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apiServer = startTestAPIServerForOIDC(t, oidcServer.URL(), defaultOIDCClientID, caFilePath)
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adminClient := kubernetes.NewForConfigOrDie(apiServer.ClientConfig)
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configureRBAC(t, adminClient, defaultRole, defaultRoleBinding)
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anotherSigningPrivateKey, wantErr := rsa.GenerateKey(rand.Reader, rsaKeyBitSize)
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require.NoError(t, wantErr)
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oidcServer.JwksHandler().EXPECT().KeySet().AnyTimes().DoAndReturn(utilsoidc.DefaultJwksHandlerBehaviour(t, &anotherSigningPrivateKey.PublicKey))
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return oidcServer, apiServer, signingPrivateKey, caCertContent, caFilePath
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},
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configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
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oidcServer.TokenHandler().EXPECT().Token().Times(1).DoAndReturn(utilsoidc.TokenHandlerBehaviourReturningPredefinedJWT(
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t,
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signingPrivateKey,
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oidcServer.URL(),
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defaultOIDCClientID,
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defaultOIDCClaimedUsername,
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defaultStubAccessToken,
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defaultStubRefreshToken,
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time.Now().Add(time.Second*1200).Unix(),
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))
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},
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configureClient: configureClientFetchingOIDCCredentials,
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asserErrFn: func(t *testing.T, errorToCheck error) {
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assert.True(t, apierrors.IsUnauthorized(errorToCheck), errorToCheck)
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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oidcServer, apiServer, signingPrivateKey, caCert, certPath := tt.configureInfrastructure(t)
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tt.configureOIDCServerBehaviour(t, oidcServer, signingPrivateKey)
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tokenURL, err := oidcServer.TokenURL()
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require.NoError(t, err)
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client := tt.configureClient(t, apiServer.ClientConfig, caCert, certPath, oidcServer.URL(), tokenURL)
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
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defer cancel()
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_, err = client.CoreV1().Pods(defaultNamespace).List(ctx, metav1.ListOptions{})
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tt.asserErrFn(t, err)
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})
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}
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}
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func TestUpdatingRefreshTokenInCaseOfExpiredIDToken(t *testing.T) {
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var tests = []struct {
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name string
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configureUpdatingTokenBehaviour func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey)
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asserErrFn func(t *testing.T, errorToCheck error)
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}{
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{
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name: "cache returns stale client if refresh token is not updated in config",
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configureUpdatingTokenBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
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oidcServer.TokenHandler().EXPECT().Token().Times(1).DoAndReturn(utilsoidc.TokenHandlerBehaviourReturningPredefinedJWT(
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t,
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signingPrivateKey,
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oidcServer.URL(),
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defaultOIDCClientID,
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defaultOIDCClaimedUsername,
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defaultStubAccessToken,
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defaultStubRefreshToken,
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time.Now().Add(time.Second*1200).Unix(),
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))
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configureOIDCServerToReturnExpiredRefreshTokenErrorOnTryingToUpdateIDToken(oidcServer)
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},
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asserErrFn: func(t *testing.T, errorToCheck error) {
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urlError, ok := errorToCheck.(*url.Error)
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require.True(t, ok)
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assert.Equal(
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t,
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"failed to refresh token: oauth2: cannot fetch token: 400 Bad Request\nResponse: refresh token is expired\n",
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urlError.Err.Error(),
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)
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},
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},
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}
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oidcServer, apiServer, signingPrivateKey, caCert, certPath := configureTestInfrastructure(t)
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tokenURL, err := oidcServer.TokenURL()
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require.NoError(t, err)
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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expiredIDToken, stubRefreshToken := fetchExpiredToken(t, oidcServer, caCert, signingPrivateKey)
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clientConfig := configureClientConfigForOIDC(t, apiServer.ClientConfig, defaultOIDCClientID, certPath, expiredIDToken, stubRefreshToken, oidcServer.URL())
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expiredClient := kubernetes.NewForConfigOrDie(clientConfig)
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configureOIDCServerToReturnExpiredRefreshTokenErrorOnTryingToUpdateIDToken(oidcServer)
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
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defer cancel()
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_, err = expiredClient.CoreV1().Pods(defaultNamespace).List(ctx, metav1.ListOptions{})
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assert.Error(t, err)
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tt.configureUpdatingTokenBehaviour(t, oidcServer, signingPrivateKey)
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idToken, stubRefreshToken := fetchOIDCCredentials(t, tokenURL, caCert)
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clientConfig = configureClientConfigForOIDC(t, apiServer.ClientConfig, defaultOIDCClientID, certPath, idToken, stubRefreshToken, oidcServer.URL())
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expectedOkClient := kubernetes.NewForConfigOrDie(clientConfig)
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_, err = expectedOkClient.CoreV1().Pods(defaultNamespace).List(ctx, metav1.ListOptions{})
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|
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tt.asserErrFn(t, err)
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})
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}
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}
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|
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func configureTestInfrastructure(t *testing.T) (
|
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oidcServer *utilsoidc.TestServer,
|
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apiServer *kubeapiserverapptesting.TestServer,
|
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signingPrivateKey *rsa.PrivateKey,
|
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caCertContent []byte,
|
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caFilePath string,
|
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) {
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t.Helper()
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|
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caCertContent, _, caFilePath, caKeyFilePath := generateCert(t)
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|
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signingPrivateKey, err := rsa.GenerateKey(rand.Reader, rsaKeyBitSize)
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require.NoError(t, err)
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|
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oidcServer = utilsoidc.BuildAndRunTestServer(t, caFilePath, caKeyFilePath)
|
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apiServer = startTestAPIServerForOIDC(t, oidcServer.URL(), defaultOIDCClientID, caFilePath)
|
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|
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oidcServer.JwksHandler().EXPECT().KeySet().AnyTimes().DoAndReturn(utilsoidc.DefaultJwksHandlerBehaviour(t, &signingPrivateKey.PublicKey))
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adminClient := kubernetes.NewForConfigOrDie(apiServer.ClientConfig)
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configureRBAC(t, adminClient, defaultRole, defaultRoleBinding)
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|
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return oidcServer, apiServer, signingPrivateKey, caCertContent, caFilePath
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}
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func configureClientFetchingOIDCCredentials(t *testing.T, restCfg *rest.Config, caCert []byte, certPath, oidcServerURL, oidcServerTokenURL string) *kubernetes.Clientset {
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idToken, stubRefreshToken := fetchOIDCCredentials(t, oidcServerTokenURL, caCert)
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clientConfig := configureClientConfigForOIDC(t, restCfg, defaultOIDCClientID, certPath, idToken, stubRefreshToken, oidcServerURL)
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return kubernetes.NewForConfigOrDie(clientConfig)
|
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}
|
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|
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func configureClientWithEmptyIDToken(t *testing.T, restCfg *rest.Config, _ []byte, certPath, oidcServerURL, _ string) *kubernetes.Clientset {
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emptyIDToken, stubRefreshToken := "", defaultStubRefreshToken
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clientConfig := configureClientConfigForOIDC(t, restCfg, defaultOIDCClientID, certPath, emptyIDToken, stubRefreshToken, oidcServerURL)
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return kubernetes.NewForConfigOrDie(clientConfig)
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}
|
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|
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func configureRBAC(t *testing.T, clientset *kubernetes.Clientset, role *rbacv1.Role, binding *rbacv1.RoleBinding) {
|
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t.Helper()
|
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|
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
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defer cancel()
|
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|
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_, err := clientset.RbacV1().Roles(defaultNamespace).Create(ctx, role, metav1.CreateOptions{})
|
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require.NoError(t, err)
|
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_, err = clientset.RbacV1().RoleBindings(defaultNamespace).Create(ctx, binding, metav1.CreateOptions{})
|
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require.NoError(t, err)
|
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}
|
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|
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func configureClientConfigForOIDC(t *testing.T, config *rest.Config, clientID, caFilePath, idToken, refreshToken, oidcServerURL string) *rest.Config {
|
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t.Helper()
|
||||
cfg := rest.AnonymousClientConfig(config)
|
||||
cfg.AuthProvider = &api.AuthProviderConfig{
|
||||
Name: "oidc",
|
||||
Config: map[string]string{
|
||||
"client-id": clientID,
|
||||
"id-token": idToken,
|
||||
"idp-issuer-url": oidcServerURL,
|
||||
"idp-certificate-authority": caFilePath,
|
||||
"refresh-token": refreshToken,
|
||||
},
|
||||
}
|
||||
|
||||
return cfg
|
||||
}
|
||||
|
||||
func startTestAPIServerForOIDC(t *testing.T, oidcURL, oidcClientID, oidcCAFilePath string) *kubeapiserverapptesting.TestServer {
|
||||
t.Helper()
|
||||
|
||||
server, err := kubeapiserverapptesting.StartTestServer(
|
||||
t,
|
||||
kubeapiserverapptesting.NewDefaultTestServerOptions(),
|
||||
[]string{
|
||||
fmt.Sprintf("--oidc-issuer-url=%s", oidcURL),
|
||||
fmt.Sprintf("--oidc-client-id=%s", oidcClientID),
|
||||
fmt.Sprintf("--oidc-ca-file=%s", oidcCAFilePath),
|
||||
fmt.Sprintf("--oidc-username-prefix=%s", defaultOIDCUsernamePrefix),
|
||||
fmt.Sprintf("--authorization-mode=%s", modes.ModeRBAC),
|
||||
},
|
||||
framework.SharedEtcd(),
|
||||
)
|
||||
require.NoError(t, err)
|
||||
|
||||
t.Cleanup(server.TearDownFn)
|
||||
|
||||
return &server
|
||||
}
|
||||
|
||||
func fetchOIDCCredentials(t *testing.T, oidcTokenURL string, caCertContent []byte) (idToken, refreshToken string) {
|
||||
t.Helper()
|
||||
|
||||
req, err := http.NewRequest(http.MethodGet, oidcTokenURL, http.NoBody)
|
||||
require.NoError(t, err)
|
||||
|
||||
caPool := x509.NewCertPool()
|
||||
ok := caPool.AppendCertsFromPEM(caCertContent)
|
||||
require.True(t, ok)
|
||||
|
||||
client := http.Client{Transport: &http.Transport{
|
||||
TLSClientConfig: &tls.Config{
|
||||
RootCAs: caPool,
|
||||
},
|
||||
}}
|
||||
|
||||
token := new(utilsoidc.Token)
|
||||
|
||||
resp, err := client.Do(req)
|
||||
require.NoError(t, err)
|
||||
|
||||
err = json.NewDecoder(resp.Body).Decode(token)
|
||||
require.NoError(t, err)
|
||||
|
||||
return token.IDToken, token.RefreshToken
|
||||
}
|
||||
|
||||
func fetchExpiredToken(t *testing.T, oidcServer *utilsoidc.TestServer, caCertContent []byte, signingPrivateKey *rsa.PrivateKey) (expiredToken, stubRefreshToken string) {
|
||||
t.Helper()
|
||||
|
||||
tokenURL, err := oidcServer.TokenURL()
|
||||
require.NoError(t, err)
|
||||
|
||||
configureOIDCServerToReturnExpiredIDToken(t, 1, oidcServer, signingPrivateKey)
|
||||
expiredToken, stubRefreshToken = fetchOIDCCredentials(t, tokenURL, caCertContent)
|
||||
|
||||
return expiredToken, stubRefreshToken
|
||||
}
|
||||
|
||||
func configureOIDCServerToReturnExpiredIDToken(t *testing.T, returningExpiredTokenTimes int, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
|
||||
t.Helper()
|
||||
|
||||
oidcServer.TokenHandler().EXPECT().Token().Times(returningExpiredTokenTimes).DoAndReturn(func() (utilsoidc.Token, error) {
|
||||
token, err := utilsoidc.TokenHandlerBehaviourReturningPredefinedJWT(
|
||||
t,
|
||||
signingPrivateKey,
|
||||
oidcServer.URL(),
|
||||
defaultOIDCClientID,
|
||||
defaultOIDCClaimedUsername,
|
||||
defaultStubAccessToken,
|
||||
defaultStubRefreshToken,
|
||||
time.Now().Add(-time.Millisecond).Unix(),
|
||||
)()
|
||||
return token, err
|
||||
})
|
||||
}
|
||||
|
||||
func configureOIDCServerToReturnExpiredRefreshTokenErrorOnTryingToUpdateIDToken(oidcServer *utilsoidc.TestServer) {
|
||||
oidcServer.TokenHandler().EXPECT().Token().Times(2).Return(utilsoidc.Token{}, utilsoidc.ErrRefreshTokenExpired)
|
||||
}
|
||||
|
||||
func generateCert(t *testing.T) (cert, key []byte, certFilePath, keyFilePath string) {
|
||||
t.Helper()
|
||||
|
||||
tempDir := t.TempDir()
|
||||
certFilePath = filepath.Join(tempDir, "localhost_127.0.0.1_.crt")
|
||||
keyFilePath = filepath.Join(tempDir, "localhost_127.0.0.1_.key")
|
||||
|
||||
cert, key, err := certutil.GenerateSelfSignedCertKeyWithFixtures("localhost", []net.IP{utilsnet.ParseIPSloppy("127.0.0.1")}, nil, tempDir)
|
||||
require.NoError(t, err)
|
||||
|
||||
return cert, key, certFilePath, keyFilePath
|
||||
}
|
||||
@ -118,6 +118,7 @@ func BuildAndRunTestServer(t *testing.T, caPath, caKeyPath string) *TestServer {
|
||||
jwksURL, err := url.JoinPath(httpServer.URL + jwksWebPath)
|
||||
require.NoError(t, err)
|
||||
userInfoURL, err := url.JoinPath(httpServer.URL + authWebPath)
|
||||
require.NoError(t, err)
|
||||
|
||||
err = json.NewEncoder(writer).Encode(struct {
|
||||
Issuer string `json:"issuer"`
|
||||
|
||||
Loading…
Reference in New Issue
Block a user