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exec credential provider: first integration test (static auth interaction)
I also added some simple happy/sad path tests so we get some coverage at the integration level. Signed-off-by: Andrew Keesler <akeesler@vmware.com>
This commit is contained in:
parent
35c233f18d
commit
8834aa133c
@ -45,34 +45,21 @@ func TestCertRotation(t *testing.T) {
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stopCh := make(chan struct{})
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defer close(stopCh)
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clientSigningKey, err := utils.NewPrivateKey()
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if err != nil {
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t.Fatal(err)
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}
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clientSigningCert, err := cert.NewSelfSignedCACert(cert.Config{CommonName: "client-ca"}, clientSigningKey)
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if err != nil {
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t.Fatal(err)
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}
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transport.CertCallbackRefreshDuration = 1 * time.Second
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certDir := os.TempDir()
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clientCAFilename := path.Join(certDir, "ca.crt")
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if err := ioutil.WriteFile(clientCAFilename, utils.EncodeCertPEM(clientSigningCert), 0644); err != nil {
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t.Fatal(err)
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}
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clientCAFilename, clientSigningCert, clientSigningKey := writeCACertFiles(t, certDir)
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server := apiservertesting.StartTestServerOrDie(t, apiservertesting.NewDefaultTestServerOptions(), []string{
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"--client-ca-file=" + clientCAFilename,
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}, framework.SharedEtcd())
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defer server.TearDownFn()
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writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
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clientCertFilename, clientKeyFilename := writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
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kubeconfig := server.ClientConfig
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kubeconfig.CertFile = path.Join(certDir, "client.crt")
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kubeconfig.KeyFile = path.Join(certDir, "client.key")
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kubeconfig.CertFile = clientCertFilename
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kubeconfig.KeyFile = clientKeyFilename
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kubeconfig.BearerToken = ""
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client := clientset.NewForConfigOrDie(kubeconfig)
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@ -115,34 +102,21 @@ func TestCertRotationContinuousRequests(t *testing.T) {
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stopCh := make(chan struct{})
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defer close(stopCh)
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clientSigningKey, err := utils.NewPrivateKey()
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if err != nil {
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t.Fatal(err)
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}
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clientSigningCert, err := cert.NewSelfSignedCACert(cert.Config{CommonName: "client-ca"}, clientSigningKey)
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if err != nil {
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t.Fatal(err)
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}
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transport.CertCallbackRefreshDuration = 1 * time.Second
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certDir := os.TempDir()
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clientCAFilename := path.Join(certDir, "ca.crt")
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if err := ioutil.WriteFile(clientCAFilename, utils.EncodeCertPEM(clientSigningCert), 0644); err != nil {
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t.Fatal(err)
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}
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clientCAFilename, clientSigningCert, clientSigningKey := writeCACertFiles(t, certDir)
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server := apiservertesting.StartTestServerOrDie(t, apiservertesting.NewDefaultTestServerOptions(), []string{
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"--client-ca-file=" + clientCAFilename,
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}, framework.SharedEtcd())
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defer server.TearDownFn()
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writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
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clientCertFilename, clientKeyFilename := writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
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kubeconfig := server.ClientConfig
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kubeconfig.CertFile = path.Join(certDir, "client.crt")
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kubeconfig.KeyFile = path.Join(certDir, "client.key")
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kubeconfig.CertFile = clientCertFilename
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kubeconfig.KeyFile = clientKeyFilename
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kubeconfig.BearerToken = ""
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client := clientset.NewForConfigOrDie(kubeconfig)
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@ -171,7 +145,26 @@ func TestCertRotationContinuousRequests(t *testing.T) {
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}
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}
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func writeCerts(t *testing.T, clientSigningCert *x509.Certificate, clientSigningKey *rsa.PrivateKey, certDir string, duration time.Duration) {
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func writeCACertFiles(t *testing.T, certDir string) (string, *x509.Certificate, *rsa.PrivateKey) {
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clientSigningKey, err := utils.NewPrivateKey()
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if err != nil {
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t.Fatal(err)
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}
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clientSigningCert, err := cert.NewSelfSignedCACert(cert.Config{CommonName: "client-ca"}, clientSigningKey)
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if err != nil {
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t.Fatal(err)
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}
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clientCAFilename := path.Join(certDir, "ca.crt")
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if err := ioutil.WriteFile(clientCAFilename, utils.EncodeCertPEM(clientSigningCert), 0644); err != nil {
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t.Fatal(err)
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}
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return clientCAFilename, clientSigningCert, clientSigningKey
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}
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func writeCerts(t *testing.T, clientSigningCert *x509.Certificate, clientSigningKey *rsa.PrivateKey, certDir string, duration time.Duration) (string, string) {
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clientKey, err := utils.NewPrivateKey()
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if err != nil {
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t.Fatal(err)
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@ -211,4 +204,6 @@ func writeCerts(t *testing.T, clientSigningCert *x509.Certificate, clientSigning
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if err := ioutil.WriteFile(path.Join(certDir, "client.crt"), pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDERBytes}), 0666); err != nil {
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t.Fatal(err)
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}
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return path.Join(certDir, "client.crt"), path.Join(certDir, "client.key")
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}
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466
test/integration/client/exec_test.go
Normal file
466
test/integration/client/exec_test.go
Normal file
@ -0,0 +1,466 @@
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/*
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Copyright 2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package client
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"encoding/base64"
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"fmt"
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"io/ioutil"
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"net/http"
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"os"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
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"k8s.io/client-go/transport"
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"k8s.io/client-go/util/cert"
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kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
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"k8s.io/kubernetes/test/integration/framework"
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)
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// This file tests the client-go credential plugin feature.
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type roundTripperFunc func(*http.Request) (*http.Response, error)
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func (f roundTripperFunc) RoundTrip(req *http.Request) (*http.Response, error) {
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return f(req)
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}
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type syncedHeaderValues struct {
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mu sync.Mutex
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data [][]string
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}
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func (s *syncedHeaderValues) append(values []string) {
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s.mu.Lock()
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defer s.mu.Unlock()
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s.data = append(s.data, values)
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}
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func (s *syncedHeaderValues) get() [][]string {
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s.mu.Lock()
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defer s.mu.Unlock()
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return s.data
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}
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func TestExecPlugin(t *testing.T) {
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// These constants are used to communicate behavior to the testdata/exec-plugin.sh test fixture.
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const (
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outputEnvVar = "EXEC_PLUGIN_OUTPUT"
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)
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const (
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clientAuthorizedToken = "authorized-token"
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clientUnauthorizedToken = "unauthorized-token"
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)
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certDir, err := ioutil.TempDir("", "kubernetes-client-exec-test-cert-dir-*")
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if err != nil {
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t.Fatal(err)
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}
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tokenFileName := writeTokenFile(t, clientAuthorizedToken)
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clientCAFileName, clientSigningCert, clientSigningKey := writeCACertFiles(t, certDir)
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clientCertFileName, clientKeyFileName := writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
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result := kubeapiservertesting.StartTestServerOrDie(
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t,
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nil,
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[]string{
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"--token-auth-file", tokenFileName,
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"--client-ca-file=" + clientCAFileName,
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},
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framework.SharedEtcd(),
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)
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t.Cleanup(result.TearDownFn)
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unauthorizedCert, unauthorizedKey, err := cert.GenerateSelfSignedCertKey("some-host", nil, nil)
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if err != nil {
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t.Fatal(err)
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}
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tests := []struct {
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name string
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clientConfigFunc func(*rest.Config)
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wantAuthorizationHeaderValues [][]string
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wantCertificate *tls.Certificate
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wantClientErrorPrefix string
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}{
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{
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name: "unauthorized token",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: `{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "unauthorized"
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}
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}`,
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer unauthorized"}},
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wantCertificate: &tls.Certificate{},
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wantClientErrorPrefix: "Unauthorized",
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},
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{
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name: "unauthorized certificate",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"clientCertificateData": %q,
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"clientKeyData": %q
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}
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}`, unauthorizedCert, unauthorizedKey),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{nil},
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wantCertificate: x509KeyPair(unauthorizedCert, unauthorizedKey, true),
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wantClientErrorPrefix: "Unauthorized",
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},
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{
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name: "authorized token",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s"
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}
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}`, clientAuthorizedToken),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientAuthorizedToken}},
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wantCertificate: &tls.Certificate{},
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},
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{
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name: "authorized certificate",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"clientCertificateData": %s,
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"clientKeyData": %s
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}
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}`, read(t, clientCertFileName), read(t, clientKeyFileName)),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{nil},
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wantCertificate: loadX509KeyPair(clientCertFileName, clientKeyFileName),
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},
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{
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name: "authorized token and certificate",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s",
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"clientCertificateData": %s,
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"clientKeyData": %s
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}
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}`, clientAuthorizedToken, read(t, clientCertFileName), read(t, clientKeyFileName)),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientAuthorizedToken}},
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wantCertificate: loadX509KeyPair(clientCertFileName, clientKeyFileName),
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},
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{
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name: "unauthorized token and authorized certificate favors authorized certificate",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s",
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"clientCertificateData": %s,
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"clientKeyData": %s
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}
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}`, clientUnauthorizedToken, read(t, clientCertFileName), read(t, clientKeyFileName)),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientUnauthorizedToken}},
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wantCertificate: loadX509KeyPair(clientCertFileName, clientKeyFileName),
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},
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{
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name: "authorized token and unauthorized certificate favors authorized token",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s",
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"clientCertificateData": %q,
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"clientKeyData": %q
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}
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}`, clientAuthorizedToken, string(unauthorizedCert), string(unauthorizedKey)),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientAuthorizedToken}},
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wantCertificate: x509KeyPair([]byte(unauthorizedCert), []byte(unauthorizedKey), true),
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},
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{
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name: "unauthorized token and unauthorized certificate",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s",
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"clientCertificateData": %q,
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"clientKeyData": %q
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}
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}`, clientUnauthorizedToken, string(unauthorizedCert), string(unauthorizedKey)),
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},
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}
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientUnauthorizedToken}},
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wantCertificate: x509KeyPair([]byte(unauthorizedCert), []byte(unauthorizedKey), true),
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wantClientErrorPrefix: "Unauthorized",
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},
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{
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name: "good token with static auth basic creds favors static auth basic creds",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
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{
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Name: outputEnvVar,
|
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
|
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"apiVersion": "client.authentication.k8s.io/v1beta1",
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"status": {
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"token": "%s"
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}
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}`, clientAuthorizedToken),
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},
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}
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c.Username = "unauthorized"
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c.Password = "unauthorized"
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},
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wantAuthorizationHeaderValues: [][]string{{"Basic " + basicAuthHeaderValue("unauthorized", "unauthorized")}},
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wantCertificate: &tls.Certificate{},
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wantClientErrorPrefix: "Unauthorized",
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},
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{
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name: "good token with static auth bearer token favors static auth bearer token",
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clientConfigFunc: func(c *rest.Config) {
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
|
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{
|
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Name: outputEnvVar,
|
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
|
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"apiVersion": "client.authentication.k8s.io/v1beta1",
|
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"status": {
|
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"token": "%s"
|
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}
|
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}`, clientAuthorizedToken),
|
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},
|
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}
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c.BearerToken = "some-unauthorized-token"
|
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer some-unauthorized-token"}},
|
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wantClientErrorPrefix: "Unauthorized",
|
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},
|
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{
|
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// This is not the behavior we would expect, see
|
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// https://github.com/kubernetes/kubernetes/issues/99603
|
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name: "good token with static auth cert and key favors exec plugin",
|
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clientConfigFunc: func(c *rest.Config) {
|
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c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
|
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{
|
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Name: outputEnvVar,
|
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Value: fmt.Sprintf(`{
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"kind": "ExecCredential",
|
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"apiVersion": "client.authentication.k8s.io/v1beta1",
|
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"status": {
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"token": "%s"
|
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}
|
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}`, clientAuthorizedToken),
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},
|
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}
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c.CertData = unauthorizedCert
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c.KeyData = unauthorizedKey
|
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},
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wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientAuthorizedToken}},
|
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wantCertificate: x509KeyPair([]byte(unauthorizedCert), []byte(unauthorizedKey), false),
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "kubernetes-client-exec-test-plugin-dir-*")
|
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if err != nil {
|
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t.Fatal(err)
|
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}
|
||||
defer os.RemoveAll(tmpDir)
|
||||
|
||||
var authorizationHeaderValues syncedHeaderValues
|
||||
clientConfig := rest.AnonymousClientConfig(result.ClientConfig)
|
||||
clientConfig.ExecProvider = &clientcmdapi.ExecConfig{
|
||||
Command: "testdata/exec-plugin.sh",
|
||||
// TODO(ankeesler): move to v1 once exec plugins go GA.
|
||||
APIVersion: "client.authentication.k8s.io/v1beta1",
|
||||
}
|
||||
clientConfig.Wrap(transport.WrapperFunc(func(rt http.RoundTripper) http.RoundTripper {
|
||||
return roundTripperFunc(func(req *http.Request) (*http.Response, error) {
|
||||
authorizationHeaderValues.append(req.Header.Values("Authorization"))
|
||||
return rt.RoundTrip(req)
|
||||
})
|
||||
}))
|
||||
|
||||
if test.clientConfigFunc != nil {
|
||||
test.clientConfigFunc(clientConfig)
|
||||
}
|
||||
client := clientset.NewForConfigOrDie(clientConfig)
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
|
||||
defer cancel()
|
||||
|
||||
// Validate that the client works as expected on its own.
|
||||
_, err = client.CoreV1().ConfigMaps("default").List(ctx, metav1.ListOptions{})
|
||||
if test.wantClientErrorPrefix != "" {
|
||||
if err == nil || !strings.HasPrefix(err.Error(), test.wantClientErrorPrefix) {
|
||||
t.Fatalf(`got %q, wanted "%s..."`, err, test.wantClientErrorPrefix)
|
||||
}
|
||||
} else if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
// Validate that the right token is used.
|
||||
if diff := cmp.Diff(test.wantAuthorizationHeaderValues, authorizationHeaderValues.get()); diff != "" {
|
||||
t.Error("unexpected authorization header values; -want, +got:\n" + diff)
|
||||
}
|
||||
|
||||
// Validate that the right certs are used.
|
||||
tlsConfig, err := rest.TLSConfigFor(clientConfig)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if tlsConfig.GetClientCertificate == nil {
|
||||
if test.wantCertificate != nil {
|
||||
t.Error("GetClientCertificate is nil, but we expected a certificate")
|
||||
}
|
||||
} else {
|
||||
cert, err := tlsConfig.GetClientCertificate(&tls.CertificateRequestInfo{})
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if diff := cmp.Diff(test.wantCertificate, cert); diff != "" {
|
||||
t.Error("unexpected certificate; -want, +got:\n" + diff)
|
||||
}
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func writeTokenFile(t *testing.T, goodToken string) string {
|
||||
t.Helper()
|
||||
|
||||
tokenFile, err := ioutil.TempFile("", "kubernetes-client-exec-test-token-file-*")
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if _, err := tokenFile.WriteString(fmt.Sprintf(`%s,admin,uid1,"system:masters"`, goodToken)); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if err := tokenFile.Close(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
return tokenFile.Name()
|
||||
}
|
||||
|
||||
func read(t *testing.T, fileName string) string {
|
||||
t.Helper()
|
||||
data, err := ioutil.ReadFile(fileName)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
return fmt.Sprintf("%q", string(data))
|
||||
}
|
||||
|
||||
func basicAuthHeaderValue(username, password string) string {
|
||||
return base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", username, password)))
|
||||
}
|
||||
|
||||
func x509KeyPair(certPEMBlock, keyPEMBlock []byte, leaf bool) *tls.Certificate {
|
||||
cert, err := tls.X509KeyPair(certPEMBlock, keyPEMBlock)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
if leaf {
|
||||
cert.Leaf, err = x509.ParseCertificate(cert.Certificate[0])
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
}
|
||||
return &cert
|
||||
}
|
||||
|
||||
func loadX509KeyPair(certFile, keyFile string) *tls.Certificate {
|
||||
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
cert.Leaf, err = x509.ParseCertificate(cert.Certificate[0])
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
return &cert
|
||||
}
|
21
test/integration/client/testdata/exec-plugin.sh
vendored
Executable file
21
test/integration/client/testdata/exec-plugin.sh
vendored
Executable file
@ -0,0 +1,21 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
# Copyright 2018 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.
|
||||
|
||||
set -o errexit
|
||||
set -o nounset
|
||||
set -o pipefail
|
||||
|
||||
echo "$EXEC_PLUGIN_OUTPUT"
|
Loading…
Reference in New Issue
Block a user