authz_test.go

Documentation: k8s.io/kubernetes/pkg/registry/admissionregistration/validatingadmissionpolicy

     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 validatingadmissionpolicy
    18  
    19  import (
    20  	"context"
    21  	"testing"
    22  
    23  	"k8s.io/apimachinery/pkg/runtime/schema"
    24  	"k8s.io/apiserver/pkg/authentication/user"
    25  	"k8s.io/apiserver/pkg/authorization/authorizer"
    26  	"k8s.io/apiserver/pkg/endpoints/request"
    27  	"k8s.io/kubernetes/pkg/registry/admissionregistration/resolver"
    28  )
    29  
    30  func TestAuthorization(t *testing.T) {
    31  	for _, tc := range []struct {
    32  		name             string
    33  		userInfo         user.Info
    34  		auth             AuthFunc
    35  		resourceResolver resolver.ResourceResolverFunc
    36  		expectErr        bool
    37  	}{
    38  		{
    39  			name:      "superuser",
    40  			userInfo:  &user.DefaultInfo{Groups: []string{user.SystemPrivilegedGroup}},
    41  			expectErr: false, // success despite always-denying authorizer
    42  			auth: func(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
    43  				return authorizer.DecisionDeny, "", nil
    44  			},
    45  		},
    46  		{
    47  			name:     "authorized",
    48  			userInfo: &user.DefaultInfo{Groups: []string{user.AllAuthenticated}},
    49  			auth: func(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
    50  				if a.GetResource() == "replicalimits" {
    51  					return authorizer.DecisionAllow, "", nil
    52  				}
    53  				return authorizer.DecisionDeny, "", nil
    54  			},
    55  			resourceResolver: func(gvk schema.GroupVersionKind) (schema.GroupVersionResource, error) {
    56  				return schema.GroupVersionResource{
    57  					Group:    "rules.example.com",
    58  					Version:  "v1",
    59  					Resource: "replicalimits",
    60  				}, nil
    61  			},
    62  			expectErr: false,
    63  		},
    64  		{
    65  			name:     "denied",
    66  			userInfo: &user.DefaultInfo{Groups: []string{user.AllAuthenticated}},
    67  			auth: func(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
    68  				if a.GetResource() == "configmaps" {
    69  					return authorizer.DecisionAllow, "", nil
    70  				}
    71  				return authorizer.DecisionDeny, "", nil
    72  			},
    73  			resourceResolver: func(gvk schema.GroupVersionKind) (schema.GroupVersionResource, error) {
    74  				return schema.GroupVersionResource{
    75  					Group:    "rules.example.com",
    76  					Version:  "v1",
    77  					Resource: "replicalimits",
    78  				}, nil
    79  			},
    80  			expectErr: true,
    81  		},
    82  	} {
    83  		t.Run(tc.name, func(t *testing.T) {
    84  			strategy := NewStrategy(tc.auth, tc.resourceResolver)
    85  			t.Run("create", func(t *testing.T) {
    86  				ctx := request.WithUser(context.Background(), tc.userInfo)
    87  				errs := strategy.Validate(ctx, validValidatingAdmissionPolicy())
    88  				if len(errs) > 0 != tc.expectErr {
    89  					t.Errorf("expected error: %v but got error: %v", tc.expectErr, errs)
    90  				}
    91  			})
    92  			t.Run("update", func(t *testing.T) {
    93  				ctx := request.WithUser(context.Background(), tc.userInfo)
    94  				obj := validValidatingAdmissionPolicy()
    95  				objWithUpdatedParamKind := obj.DeepCopy()
    96  				objWithUpdatedParamKind.Spec.ParamKind.APIVersion += "1"
    97  				errs := strategy.ValidateUpdate(ctx, obj, objWithUpdatedParamKind)
    98  				if len(errs) > 0 != tc.expectErr {
    99  					t.Errorf("expected error: %v but got error: %v", tc.expectErr, errs)
   100  				}
   101  			})
   102  		})
   103  	}
   104  }
   105  
   106  type AuthFunc func(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error)
   107  
   108  func (f AuthFunc) Authorize(ctx context.Context, a authorizer.Attributes) (authorized authorizer.Decision, reason string, err error) {
   109  	return f(ctx, a)
   110  }
   111
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