|
| 1 | +/* |
| 2 | +Copyright 2024 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 anonymous |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + "crypto/tls" |
| 22 | + "fmt" |
| 23 | + "net/http" |
| 24 | + "os" |
| 25 | + "testing" |
| 26 | + |
| 27 | + "github.com/stretchr/testify/require" |
| 28 | + rbacv1 "k8s.io/api/rbac/v1" |
| 29 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 30 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 31 | + "k8s.io/apiserver/pkg/features" |
| 32 | + utilfeature "k8s.io/apiserver/pkg/util/feature" |
| 33 | + "k8s.io/client-go/kubernetes" |
| 34 | + _ "k8s.io/client-go/plugin/pkg/client/auth/oidc" |
| 35 | + featuregatetesting "k8s.io/component-base/featuregate/testing" |
| 36 | + kubeapiserverapptesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing" |
| 37 | + "k8s.io/kubernetes/pkg/apis/rbac" |
| 38 | + "k8s.io/kubernetes/test/integration/authutil" |
| 39 | + "k8s.io/kubernetes/test/integration/framework" |
| 40 | +) |
| 41 | + |
| 42 | +const ( |
| 43 | + defaultNamespace = "default" |
| 44 | + defaultRBACRoleName = "developer-role" |
| 45 | + defaultRBACRoleBindingName = "developer-role-binding" |
| 46 | + anonymousUser = "system:anonymous" |
| 47 | +) |
| 48 | + |
| 49 | +var ( |
| 50 | + defaultRole = &rbacv1.Role{ |
| 51 | + TypeMeta: metav1.TypeMeta{APIVersion: "rbac.authorization.k8s.io/v1", Kind: "Role"}, |
| 52 | + ObjectMeta: metav1.ObjectMeta{Name: defaultRBACRoleName, Namespace: defaultNamespace}, |
| 53 | + Rules: []rbacv1.PolicyRule{ |
| 54 | + { |
| 55 | + Verbs: []string{"list"}, |
| 56 | + Resources: []string{"pods"}, |
| 57 | + APIGroups: []string{""}, |
| 58 | + }, |
| 59 | + }, |
| 60 | + } |
| 61 | + defaultRoleBinding = &rbacv1.RoleBinding{ |
| 62 | + TypeMeta: metav1.TypeMeta{APIVersion: "rbac.authorization.k8s.io/v1", Kind: "RoleBinding"}, |
| 63 | + ObjectMeta: metav1.ObjectMeta{Name: defaultRBACRoleBindingName, Namespace: defaultNamespace}, |
| 64 | + Subjects: []rbacv1.Subject{ |
| 65 | + { |
| 66 | + APIGroup: rbac.GroupName, |
| 67 | + Kind: rbacv1.UserKind, |
| 68 | + Name: anonymousUser, |
| 69 | + }, |
| 70 | + }, |
| 71 | + RoleRef: rbacv1.RoleRef{ |
| 72 | + APIGroup: rbac.GroupName, |
| 73 | + Kind: "Role", |
| 74 | + Name: defaultRBACRoleName, |
| 75 | + }, |
| 76 | + } |
| 77 | +) |
| 78 | + |
| 79 | +func TestStructuredAuthenticationConfig(t *testing.T) { |
| 80 | + t.Log("Testing anonymous authenticator with authentication config") |
| 81 | + |
| 82 | + featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.StructuredAuthenticationConfiguration, true) |
| 83 | + featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.AnonymousAuthConfigurableEndpoints, true) |
| 84 | + |
| 85 | + testCases := []struct { |
| 86 | + desc string |
| 87 | + authConfig string |
| 88 | + additionalFlags []string |
| 89 | + assertErrFn func(t *testing.T, errorToCheck error) |
| 90 | + assertFn func(t *testing.T, server kubeapiserverapptesting.TestServer) |
| 91 | + }{ |
| 92 | + { |
| 93 | + desc: "valid config no conditions", |
| 94 | + authConfig: ` |
| 95 | +apiVersion: apiserver.config.k8s.io/v1beta1 |
| 96 | +kind: AuthenticationConfiguration |
| 97 | +anonymous: |
| 98 | + enabled: true |
| 99 | +`, |
| 100 | + assertErrFn: func(t *testing.T, errorToCheck error) { |
| 101 | + require.NoError(t, errorToCheck) |
| 102 | + }, |
| 103 | + assertFn: func(t *testing.T, server kubeapiserverapptesting.TestServer) { |
| 104 | + configureRBAC(t, server) |
| 105 | + |
| 106 | + client := insecureHTTPClient(t) |
| 107 | + |
| 108 | + resp, err := client.Get(server.ClientConfig.Host + "/api/v1/namespaces/default/pods") |
| 109 | + require.NoError(t, err) |
| 110 | + defer resp.Body.Close() //nolint:errcheck |
| 111 | + require.Equal(t, 200, resp.StatusCode) |
| 112 | + |
| 113 | + resp, err = client.Get(server.ClientConfig.Host + "/livez") |
| 114 | + require.NoError(t, err) |
| 115 | + defer resp.Body.Close() //nolint:errcheck |
| 116 | + require.Equal(t, 200, resp.StatusCode) |
| 117 | + |
| 118 | + resp, err = client.Get(server.ClientConfig.Host + "/healthz") |
| 119 | + require.NoError(t, err) |
| 120 | + defer resp.Body.Close() //nolint:errcheck |
| 121 | + require.Equal(t, 200, resp.StatusCode) |
| 122 | + |
| 123 | + }, |
| 124 | + additionalFlags: nil, |
| 125 | + }, |
| 126 | + { |
| 127 | + desc: "valid config with conditions", |
| 128 | + authConfig: ` |
| 129 | +apiVersion: apiserver.config.k8s.io/v1beta1 |
| 130 | +kind: AuthenticationConfiguration |
| 131 | +anonymous: |
| 132 | + enabled: true |
| 133 | + conditions: |
| 134 | + - path: "/livez" |
| 135 | +`, |
| 136 | + assertErrFn: func(t *testing.T, errorToCheck error) { |
| 137 | + require.NoError(t, errorToCheck) |
| 138 | + }, |
| 139 | + assertFn: func(t *testing.T, server kubeapiserverapptesting.TestServer) { |
| 140 | + client := insecureHTTPClient(t) |
| 141 | + |
| 142 | + resp, err := client.Get(server.ClientConfig.Host + "/api/v1/namespaces/default/pods") |
| 143 | + require.NoError(t, err) |
| 144 | + defer resp.Body.Close() //nolint:errcheck |
| 145 | + require.Equal(t, 401, resp.StatusCode) |
| 146 | + |
| 147 | + resp, err = client.Get(server.ClientConfig.Host + "/livez") |
| 148 | + require.NoError(t, err) |
| 149 | + defer resp.Body.Close() //nolint:errcheck |
| 150 | + require.Equal(t, 200, resp.StatusCode) |
| 151 | + |
| 152 | + resp, err = client.Get(server.ClientConfig.Host + "/healthz") |
| 153 | + require.NoError(t, err) |
| 154 | + defer resp.Body.Close() //nolint:errcheck |
| 155 | + require.Equal(t, 401, resp.StatusCode) |
| 156 | + |
| 157 | + }, |
| 158 | + additionalFlags: nil, |
| 159 | + }, |
| 160 | + } |
| 161 | + |
| 162 | + for _, tc := range testCases { |
| 163 | + t.Run(tc.desc, func(t *testing.T) { |
| 164 | + flags := []string{"--authorization-mode=RBAC"} |
| 165 | + flags = append(flags, fmt.Sprintf("--authentication-config=%s", writeTempFile(t, tc.authConfig))) |
| 166 | + flags = append(flags, tc.additionalFlags...) |
| 167 | + |
| 168 | + server, err := kubeapiserverapptesting.StartTestServer( |
| 169 | + t, |
| 170 | + kubeapiserverapptesting.NewDefaultTestServerOptions(), |
| 171 | + flags, |
| 172 | + framework.SharedEtcd(), |
| 173 | + ) |
| 174 | + |
| 175 | + tc.assertErrFn(t, err) |
| 176 | + |
| 177 | + if tc.assertFn == nil { |
| 178 | + return |
| 179 | + } |
| 180 | + |
| 181 | + defer server.TearDownFn() |
| 182 | + |
| 183 | + tc.assertFn(t, server) |
| 184 | + }) |
| 185 | + } |
| 186 | +} |
| 187 | + |
| 188 | +func TestMain(m *testing.M) { |
| 189 | + framework.EtcdMain(m.Run) |
| 190 | +} |
| 191 | + |
| 192 | +func writeTempFile(t *testing.T, content string) string { |
| 193 | + t.Helper() |
| 194 | + file, err := os.CreateTemp("", "anonymous-auth-test") |
| 195 | + if err != nil { |
| 196 | + t.Fatal(err) |
| 197 | + } |
| 198 | + t.Cleanup(func() { |
| 199 | + if err := os.Remove(file.Name()); err != nil { |
| 200 | + t.Fatal(err) |
| 201 | + } |
| 202 | + }) |
| 203 | + if err := os.WriteFile(file.Name(), []byte(content), 0600); err != nil { |
| 204 | + t.Fatal(err) |
| 205 | + } |
| 206 | + return file.Name() |
| 207 | +} |
| 208 | + |
| 209 | +func configureRBAC(t *testing.T, server kubeapiserverapptesting.TestServer) { |
| 210 | + t.Helper() |
| 211 | + |
| 212 | + kc := kubernetes.NewForConfigOrDie(server.ClientConfig) |
| 213 | + |
| 214 | + _, err := kc.RbacV1().Roles(defaultNamespace).Create(context.Background(), defaultRole, metav1.CreateOptions{}) |
| 215 | + require.NoError(t, err) |
| 216 | + |
| 217 | + _, err = kc.RbacV1().RoleBindings(defaultNamespace).Create(context.Background(), defaultRoleBinding, metav1.CreateOptions{}) |
| 218 | + require.NoError(t, err) |
| 219 | + |
| 220 | + authutil.WaitForNamedAuthorizationUpdate( |
| 221 | + t, |
| 222 | + context.Background(), |
| 223 | + kc.AuthorizationV1(), |
| 224 | + anonymousUser, |
| 225 | + defaultNamespace, // namespace |
| 226 | + "list", |
| 227 | + "", // resource name |
| 228 | + schema.GroupResource{Group: "", Resource: "pods"}, |
| 229 | + true, |
| 230 | + ) |
| 231 | +} |
| 232 | + |
| 233 | +func insecureHTTPClient(t *testing.T) *http.Client { |
| 234 | + t.Helper() |
| 235 | + |
| 236 | + return &http.Client{ |
| 237 | + Transport: &http.Transport{ |
| 238 | + TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, |
| 239 | + }, |
| 240 | + } |
| 241 | +} |
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