1 /*-
2 * Copyright (c) 2021 Gleb Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/acl.h>
29 #include <sys/stat.h>
30
31 #include <stdlib.h>
32 #include <errno.h>
33
34 #include <atf-c.h>
35
36 /* Compatibility shim to make it possible to run this test on Linux
37 * gcc -I/path/to/atf/include -L/path/to/atf/lib -latf-c -lacl acl-api-test.c
38 */
39 #ifdef __linux__
40 #include <acl/libacl.h>
41 #define acl_from_mode_np acl_from_mode
42 #define acl_equiv_mode_np acl_equiv_mode
43 #define acl_cmp_np acl_cmp
44 #endif
45
46 static const mode_t all_modes[] = {
47 S_IRUSR,
48 S_IWUSR,
49 S_IXUSR,
50 S_IRGRP,
51 S_IWGRP,
52 S_IXGRP,
53 S_IROTH,
54 S_IWOTH,
55 S_IXOTH
56 };
57
gen_random_mode(void)58 static mode_t gen_random_mode(void)
59 {
60 mode_t mode = 0;
61
62 for (unsigned i = 0; i < sizeof(all_modes) / sizeof(mode_t); i++) {
63 if (rand() % 2)
64 mode |= all_modes[i];
65 }
66
67 return (mode);
68 }
69
70 /* Generate a random mode_t, produce an acl_t from it,
71 * then use acl_equiv_mode_np to produce a mode_t again.
72 * The call should succeed and mode_t's should be equal
73 */
74 ATF_TC_WITHOUT_HEAD(acl_mode_roundup);
ATF_TC_BODY(acl_mode_roundup,tc)75 ATF_TC_BODY(acl_mode_roundup, tc)
76 {
77 int num_tests = 100;
78
79 while (num_tests--) {
80 mode_t src_mode, equiv_mode;
81 acl_t acl;
82
83 src_mode = gen_random_mode();
84
85 acl = acl_from_mode_np(src_mode);
86 ATF_REQUIRE(acl != NULL);
87
88 ATF_CHECK_EQ(0, acl_equiv_mode_np(acl, &equiv_mode));
89 ATF_CHECK_EQ(src_mode, equiv_mode);
90
91 acl_free(acl);
92 }
93 }
94
95 /* Successfull acl_equiv_mode_np calls are tested in acl_mode_roundup.
96 * Here some specific cases are tested.
97 */
98 ATF_TC_WITHOUT_HEAD(acl_equiv_mode_test);
ATF_TC_BODY(acl_equiv_mode_test,tc)99 ATF_TC_BODY(acl_equiv_mode_test, tc)
100 {
101 acl_t acl;
102 acl_entry_t entry;
103 mode_t mode;
104 int uid = 0;
105
106 acl = acl_init(1);
107 ATF_REQUIRE(acl != NULL);
108
109 /* empty acl maps to 0000 UNIX mode */
110 ATF_CHECK_EQ(0, acl_equiv_mode_np(acl, &mode));
111 ATF_CHECK_EQ(0, mode);
112
113 #ifndef __linux__
114 /* NFS-branded acl's can't be converted to UNIX mode */
115 ATF_REQUIRE_EQ(0, acl_create_entry(&acl, &entry));
116 ATF_REQUIRE_EQ(0, acl_set_tag_type(entry, ACL_EVERYONE));
117 ATF_CHECK_EQ(1, acl_equiv_mode_np(acl, &mode));
118 #endif
119
120 /* acl's with qualified user entries can't be converted to UNIX mode */
121 acl_free(acl);
122 acl = acl_init(1);
123 ATF_REQUIRE(acl != NULL);
124 ATF_REQUIRE_EQ(0, acl_create_entry(&acl, &entry));
125 ATF_REQUIRE_EQ(0, acl_set_tag_type(entry, ACL_USER));
126 ATF_REQUIRE_EQ(0, acl_set_qualifier(entry, &uid));
127 ATF_CHECK_EQ(1, acl_equiv_mode_np(acl, &mode));
128
129 /* passing NULL causes EINVAL */
130 ATF_CHECK_ERRNO(EINVAL, acl_equiv_mode_np(NULL, &mode));
131 }
132
133 ATF_TC_WITHOUT_HEAD(acl_cmp_test);
ATF_TC_BODY(acl_cmp_test,tc)134 ATF_TC_BODY(acl_cmp_test, tc)
135 {
136 acl_t empty_acl, acl1, acl2;
137 acl_entry_t entry;
138 acl_permset_t perms;
139
140 empty_acl = acl_init(1);
141 ATF_REQUIRE(empty_acl != NULL);
142
143 acl1 = acl_init(3);
144 ATF_REQUIRE(acl1 != NULL);
145
146 /* first, check that two empty acls are equal */
147 ATF_CHECK_EQ(0, acl_cmp_np(acl1, empty_acl));
148
149 /* now create an entry and compare against empty acl */
150 ATF_REQUIRE_EQ(0, acl_create_entry(&acl1, &entry));
151 ATF_REQUIRE_EQ(0, acl_set_tag_type(entry, ACL_USER_OBJ));
152 ATF_REQUIRE_EQ(0, acl_get_permset(entry, &perms));
153 ATF_REQUIRE_EQ(0, acl_clear_perms(perms));
154 ATF_REQUIRE_EQ(0, acl_add_perm(perms, ACL_READ));
155 ATF_CHECK_EQ(1, acl_cmp_np(empty_acl, acl1));
156
157 /* make a dup of non-empty acl and check that they are equal */
158 acl2 = acl_dup(acl1);
159 ATF_REQUIRE(acl2 != NULL);
160 ATF_CHECK_EQ(0, acl_cmp_np(acl1, acl2));
161
162 /* change the tag type and compare */
163 ATF_REQUIRE_EQ(1, acl_get_entry(acl1, ACL_FIRST_ENTRY, &entry));
164 ATF_REQUIRE_EQ(0, acl_set_tag_type(entry, ACL_GROUP_OBJ));
165 ATF_CHECK_EQ(1, acl_cmp_np(acl1, acl2));
166
167 /* change the permset and compare */
168 acl_free(acl2);
169 acl2 = acl_dup(acl1);
170 ATF_REQUIRE(acl2 != NULL);
171 ATF_REQUIRE_EQ(1, acl_get_entry(acl1, ACL_FIRST_ENTRY, &entry));
172 ATF_REQUIRE_EQ(0, acl_get_permset(entry, &perms));
173 ATF_REQUIRE_EQ(0, acl_clear_perms(perms));
174 ATF_CHECK_EQ(1, acl_cmp_np(acl1, acl2));
175
176 /* check that passing NULL yields EINVAL */
177 ATF_CHECK_ERRNO(EINVAL, acl_cmp_np(NULL, NULL));
178 ATF_CHECK_ERRNO(EINVAL, acl_cmp_np(acl1, NULL));
179 ATF_CHECK_ERRNO(EINVAL, acl_cmp_np(NULL, acl1));
180
181 acl_free(empty_acl);
182 acl_free(acl1);
183 acl_free(acl2);
184 }
185
ATF_TP_ADD_TCS(tp)186 ATF_TP_ADD_TCS(tp)
187 {
188
189 ATF_TP_ADD_TC(tp, acl_mode_roundup);
190 ATF_TP_ADD_TC(tp, acl_equiv_mode_test);
191 ATF_TP_ADD_TC(tp, acl_cmp_test);
192
193 return (atf_no_error());
194 }
195