1/*
2   Copyright The containerd 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
17package server
18
19import (
20	"testing"
21
22	"github.com/opencontainers/selinux/go-selinux"
23	"github.com/stretchr/testify/assert"
24	runtime "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
25)
26
27func TestInitSelinuxOpts(t *testing.T) {
28	if !selinux.GetEnabled() {
29		t.Skip("selinux is not enabled")
30	}
31
32	for desc, test := range map[string]struct {
33		selinuxOpt   *runtime.SELinuxOption
34		processLabel string
35		mountLabel   string
36		expectErr    bool
37	}{
38		"Should return empty strings for processLabel and mountLabel when selinuxOpt is nil": {
39			selinuxOpt:   nil,
40			processLabel: ".*:c[0-9]{1,3},c[0-9]{1,3}",
41			mountLabel:   ".*:c[0-9]{1,3},c[0-9]{1,3}",
42		},
43		"Should overlay fields on processLabel when selinuxOpt has been initialized partially": {
44			selinuxOpt: &runtime.SELinuxOption{
45				User:  "",
46				Role:  "user_r",
47				Type:  "",
48				Level: "s0:c1,c2",
49			},
50			processLabel: "system_u:user_r:(container_file_t|svirt_lxc_net_t):s0:c1,c2",
51			mountLabel:   "system_u:object_r:(container_file_t|svirt_sandbox_file_t):s0:c1,c2",
52		},
53		"Should be resolved correctly when selinuxOpt has been initialized completely": {
54			selinuxOpt: &runtime.SELinuxOption{
55				User:  "user_u",
56				Role:  "user_r",
57				Type:  "user_t",
58				Level: "s0:c1,c2",
59			},
60			processLabel: "user_u:user_r:user_t:s0:c1,c2",
61			mountLabel:   "user_u:object_r:(container_file_t|svirt_sandbox_file_t):s0:c1,c2",
62		},
63		"Should be resolved correctly when selinuxOpt has been initialized with level=''": {
64			selinuxOpt: &runtime.SELinuxOption{
65				User:  "user_u",
66				Role:  "user_r",
67				Type:  "user_t",
68				Level: "",
69			},
70			processLabel: "user_u:user_r:user_t:s0:c[0-9]{1,3},c[0-9]{1,3}",
71			mountLabel:   "user_u:object_r:(container_file_t|svirt_sandbox_file_t):s0",
72		},
73		"Should return error when the format of 'level' is not correct": {
74			selinuxOpt: &runtime.SELinuxOption{
75				User:  "user_u",
76				Role:  "user_r",
77				Type:  "user_t",
78				Level: "s0,c1,c2",
79			},
80			expectErr: true,
81		},
82	} {
83		t.Run(desc, func(t *testing.T) {
84			processLabel, mountLabel, err := initLabelsFromOpt(test.selinuxOpt)
85			if test.expectErr {
86				assert.Error(t, err)
87			} else {
88				assert.Regexp(t, test.processLabel, processLabel)
89				assert.Regexp(t, test.mountLabel, mountLabel)
90			}
91		})
92	}
93}
94
95func TestCheckSelinuxLevel(t *testing.T) {
96	for desc, test := range map[string]struct {
97		level         string
98		expectNoMatch bool
99	}{
100		"s0": {
101			level: "s0",
102		},
103		"s0-s0": {
104			level: "s0-s0",
105		},
106		"s0:c0": {
107			level: "s0:c0",
108		},
109		"s0:c0.c3": {
110			level: "s0:c0.c3",
111		},
112		"s0:c0,c3": {
113			level: "s0:c0,c3",
114		},
115		"s0-s0:c0,c3": {
116			level: "s0-s0:c0,c3",
117		},
118		"s0-s0:c0,c3.c6": {
119			level: "s0-s0:c0,c3.c6",
120		},
121		"s0-s0:c0,c3.c6,c8.c10": {
122			level: "s0-s0:c0,c3.c6,c8.c10",
123		},
124		"s0-s0:c0,c3.c6,c8,c10": {
125			level: "s0-s0:c0,c3.c6",
126		},
127		"s0,c0,c3": {
128			level:         "s0,c0,c3",
129			expectNoMatch: true,
130		},
131		"s0:c0.c3.c6": {
132			level:         "s0:c0.c3.c6",
133			expectNoMatch: true,
134		},
135		"s0-s0,c0,c3": {
136			level:         "s0-s0,c0,c3",
137			expectNoMatch: true,
138		},
139		"s0-s0:c0.c3.c6": {
140			level:         "s0-s0:c0.c3.c6",
141			expectNoMatch: true,
142		},
143		"s0-s0:c0,c3.c6.c8": {
144			level:         "s0-s0:c0,c3.c6.c8",
145			expectNoMatch: true,
146		},
147	} {
148		t.Run(desc, func(t *testing.T) {
149			err := checkSelinuxLevel(test.level)
150			if test.expectNoMatch {
151				assert.Error(t, err)
152			} else {
153				assert.NoError(t, err)
154			}
155		})
156	}
157}
158