1/*
2Copyright 2018 The Kubernetes Authors.
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8    http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15*/
16
17package policy
18
19import (
20	"math/rand"
21	"testing"
22	"time"
23
24	"github.com/stretchr/testify/require"
25
26	"k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
27	"k8s.io/apimachinery/pkg/runtime"
28	runtimeserializer "k8s.io/apimachinery/pkg/runtime/serializer"
29	"k8s.io/apimachinery/pkg/util/sets"
30	"k8s.io/apiserver/pkg/apis/audit"
31	auditfuzz "k8s.io/apiserver/pkg/apis/audit/fuzzer"
32)
33
34func TestEnforcePolicy(t *testing.T) {
35	scheme := runtime.NewScheme()
36	audit.SchemeBuilder.AddToScheme(scheme)
37	codecs := runtimeserializer.NewCodecFactory(scheme)
38	rs := rand.NewSource(time.Now().UnixNano())
39	objectFuzzer := fuzzer.FuzzerFor(auditfuzz.Funcs, rs, codecs)
40
41	for _, tc := range []struct {
42		name       string
43		level      audit.Level
44		omitStages []audit.Stage
45	}{
46		{
47			name:  "level metadata",
48			level: audit.LevelMetadata,
49		},
50		{
51			name:  "level request",
52			level: audit.LevelRequest,
53		},
54		{
55			name:  "level requestresponse",
56			level: audit.LevelRequestResponse,
57		},
58		{
59			name:  "level none",
60			level: audit.LevelNone,
61		},
62		{
63			name:  "level unknown",
64			level: audit.Level("unknown"),
65		},
66		{
67			name:       "stage valid",
68			level:      audit.LevelRequest,
69			omitStages: []audit.Stage{audit.StageRequestReceived},
70		},
71		{
72			name:       "stage unknown",
73			level:      audit.LevelRequest,
74			omitStages: []audit.Stage{"unknown"},
75		},
76	} {
77		t.Run(tc.name, func(t *testing.T) {
78			events := make([]audit.Event, 20)
79			omitSet := sets.NewString(ConvertStagesToStrings(tc.omitStages)...)
80			for i := range events {
81				e := &events[i]
82				objectFuzzer.Fuzz(e)
83				ev, err := EnforcePolicy(e, tc.level, tc.omitStages)
84				if omitSet.Has(string(e.Stage)) {
85					require.NoError(t, err)
86					require.Nil(t, ev)
87					return
88				}
89				switch tc.level {
90				case audit.LevelNone:
91					require.Nil(t, ev)
92				case audit.LevelMetadata:
93					expected := &audit.Event{
94						TypeMeta:                 e.TypeMeta,
95						Level:                    tc.level,
96						AuditID:                  e.AuditID,
97						Stage:                    e.Stage,
98						RequestURI:               e.RequestURI,
99						Verb:                     e.Verb,
100						User:                     e.User,
101						ImpersonatedUser:         e.ImpersonatedUser,
102						SourceIPs:                e.SourceIPs,
103						UserAgent:                e.UserAgent,
104						ObjectRef:                e.ObjectRef,
105						ResponseStatus:           e.ResponseStatus,
106						RequestReceivedTimestamp: e.RequestReceivedTimestamp,
107						StageTimestamp:           e.StageTimestamp,
108						Annotations:              e.Annotations,
109						RequestObject:            nil,
110						ResponseObject:           nil,
111					}
112					require.Equal(t, expected, ev)
113				case audit.LevelRequest:
114					expected := &audit.Event{
115						TypeMeta:                 e.TypeMeta,
116						Level:                    tc.level,
117						AuditID:                  e.AuditID,
118						Stage:                    e.Stage,
119						RequestURI:               e.RequestURI,
120						Verb:                     e.Verb,
121						User:                     e.User,
122						ImpersonatedUser:         e.ImpersonatedUser,
123						SourceIPs:                e.SourceIPs,
124						UserAgent:                e.UserAgent,
125						ObjectRef:                e.ObjectRef,
126						ResponseStatus:           e.ResponseStatus,
127						RequestReceivedTimestamp: e.RequestReceivedTimestamp,
128						StageTimestamp:           e.StageTimestamp,
129						Annotations:              e.Annotations,
130						RequestObject:            e.RequestObject,
131						ResponseObject:           nil,
132					}
133					require.Equal(t, expected, ev)
134				case audit.LevelRequestResponse:
135					expected := e.DeepCopy()
136					expected.Level = tc.level
137					require.Equal(t, expected, ev)
138				default:
139					require.Error(t, err)
140					return
141				}
142				require.NoError(t, err)
143			}
144		})
145	}
146}
147