signer_name_change_forbidden_test.go

Documentation: k8s.io/kubernetes/test/integration/clustertrustbundles

     1  /*
     2  Copyright 2022 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package clustertrustbundles
    18  
    19  import (
    20  	"context"
    21  	"crypto/x509"
    22  	"crypto/x509/pkix"
    23  	"fmt"
    24  	"math/big"
    25  	"testing"
    26  
    27  	certsv1alpha1 "k8s.io/api/certificates/v1alpha1"
    28  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    29  	"k8s.io/client-go/kubernetes"
    30  	kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
    31  	"k8s.io/kubernetes/test/integration/framework"
    32  )
    33  
    34  func TestCTBSignerNameChangeForbidden(t *testing.T) {
    35  	testCases := []struct {
    36  		objectName string
    37  		signer1    string
    38  		signer2    string
    39  	}{
    40  		{
    41  			objectName: "foo",
    42  			signer1:    "",
    43  			signer2:    "foo.com/bar",
    44  		},
    45  		{
    46  			objectName: "foo.com:bar:abc",
    47  			signer1:    "foo.com/bar",
    48  			signer2:    "",
    49  		},
    50  		{
    51  			objectName: "foo.com:bar:abc",
    52  			signer1:    "foo.com/bar",
    53  			signer2:    "foo.com/bar2",
    54  		},
    55  	}
    56  
    57  	for _, tc := range testCases {
    58  		t.Run(fmt.Sprintf("%s -> %s", tc.signer1, tc.signer2), func(t *testing.T) {
    59  
    60  			ctx := context.Background()
    61  
    62  			server := kubeapiservertesting.StartTestServerOrDie(t, nil, []string{"--feature-gates=ClusterTrustBundle=true"}, framework.SharedEtcd())
    63  			defer server.TearDownFn()
    64  
    65  			client := kubernetes.NewForConfigOrDie(server.ClientConfig)
    66  
    67  			bundle1 := &certsv1alpha1.ClusterTrustBundle{
    68  				ObjectMeta: metav1.ObjectMeta{
    69  					Name: tc.objectName,
    70  				},
    71  				Spec: certsv1alpha1.ClusterTrustBundleSpec{
    72  					SignerName: tc.signer1,
    73  					TrustBundle: mustMakePEMBlock("CERTIFICATE", nil, mustMakeCertificate(t, &x509.Certificate{
    74  						SerialNumber: big.NewInt(0),
    75  						Subject: pkix.Name{
    76  							CommonName: "root1",
    77  						},
    78  						IsCA:                  true,
    79  						BasicConstraintsValid: true,
    80  					})),
    81  				},
    82  			}
    83  			bundle1, err := client.CertificatesV1alpha1().ClusterTrustBundles().Create(ctx, bundle1, metav1.CreateOptions{})
    84  			if err != nil {
    85  				t.Fatalf("Error while creating bundle1: %v", err)
    86  			}
    87  
    88  			// Pick a new signer name that is still compatible with the admission
    89  			// restrictions on object name.  That way the admission plugin won't get in
    90  			// the way by forbidding the update due to an incompatible name on the
    91  			// cluster trust bundle.
    92  			bundle1.Spec.SignerName = tc.signer2
    93  
    94  			_, err = client.CertificatesV1alpha1().ClusterTrustBundles().Update(ctx, bundle1, metav1.UpdateOptions{})
    95  			if err == nil {
    96  				t.Fatalf("Got nil error from updating bundle foo-com--bar from signerName=foo.com/bar to signerName=foo.com/bar2, but wanted an error")
    97  			}
    98  		})
    99  	}
   100  
   101  }
   102
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