1 /* $OpenBSD: t_revoke.c,v 1.3 2021/12/13 16:56:48 deraadt Exp $ */
2 /* $NetBSD: t_revoke.c,v 1.2 2017/01/13 21:15:57 christos Exp $ */
3
4 /*-
5 * Copyright (c) 2011 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Jukka Ruohonen.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "macros.h"
34
35 #include <sys/resource.h>
36 #include <sys/wait.h>
37
38 #include "atf-c.h"
39 #include <fcntl.h>
40 #include <errno.h>
41 #include <pwd.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 static const char path[] = "revoke";
48
49 ATF_TC_WITH_CLEANUP(revoke_basic);
ATF_TC_HEAD(revoke_basic,tc)50 ATF_TC_HEAD(revoke_basic, tc)
51 {
52 atf_tc_set_md_var(tc, "descr", "A basic test of revoke(2)");
53 }
54
ATF_TC_BODY(revoke_basic,tc)55 ATF_TC_BODY(revoke_basic, tc)
56 {
57 struct rlimit res;
58 char tmp[10];
59 size_t i, n;
60 int *buf;
61
62 (void)memset(&res, 0, sizeof(struct rlimit));
63 (void)getrlimit(RLIMIT_NOFILE, &res);
64
65 if ((n = res.rlim_cur / 10) == 0)
66 n = 10;
67
68 buf = calloc(n, sizeof(int));
69 ATF_REQUIRE(buf != NULL);
70
71 buf[0] = open(path, O_RDWR | O_CREAT, 0600);
72 ATF_REQUIRE(buf[0] >= 0);
73
74 for (i = 1; i < n; i++) {
75 buf[i] = open(path, O_RDWR);
76 ATF_REQUIRE(buf[i] >= 0);
77 }
78
79 ATF_REQUIRE(revoke(path) == 0);
80
81 for (i = 0; i < n; i++) {
82
83 ATF_REQUIRE(read(buf[i], tmp, sizeof(tmp)) == -1);
84
85 (void)close(buf[i]);
86 }
87
88 free(buf);
89
90 (void)unlink(path);
91 }
92
ATF_TC_CLEANUP(revoke_basic,tc)93 ATF_TC_CLEANUP(revoke_basic, tc)
94 {
95 (void)unlink(path);
96 }
97
98 ATF_TC(revoke_err);
ATF_TC_HEAD(revoke_err,tc)99 ATF_TC_HEAD(revoke_err, tc)
100 {
101 atf_tc_set_md_var(tc, "descr", "Test errors from revoke(2)");
102 atf_tc_set_md_var(tc, "require.user", "unprivileged");
103 }
104
ATF_TC_BODY(revoke_err,tc)105 ATF_TC_BODY(revoke_err, tc)
106 {
107 char buf[1024 + 1]; /* XXX: From the manual page... */
108
109 (void)memset(buf, 'x', sizeof(buf));
110
111 errno = 0;
112 ATF_REQUIRE_ERRNO(EFAULT, revoke((char *)-1) == -1);
113
114 errno = 0;
115 ATF_REQUIRE_ERRNO(ENAMETOOLONG, revoke(buf) == -1);
116
117 errno = 0;
118 #ifdef __OpenBSD__
119 ATF_REQUIRE_ERRNO(ENOTTY, revoke("/etc/passwd") == -1);
120 #else
121 ATF_REQUIRE_ERRNO(EPERM, revoke("/etc/passwd") == -1);
122 #endif
123
124 errno = 0;
125 ATF_REQUIRE_ERRNO(ENOENT, revoke("/etc/xxx/yyy") == -1);
126 }
127
128 ATF_TC_WITH_CLEANUP(revoke_perm);
ATF_TC_HEAD(revoke_perm,tc)129 ATF_TC_HEAD(revoke_perm, tc)
130 {
131 atf_tc_set_md_var(tc, "descr", "Test permissions revoke(2)");
132 atf_tc_set_md_var(tc, "require.user", "root");
133 }
134
ATF_TC_BODY(revoke_perm,tc)135 ATF_TC_BODY(revoke_perm, tc)
136 {
137 struct passwd *pw;
138 int fd, sta;
139 pid_t pid;
140
141 pw = getpwnam("nobody");
142 fd = open(path, O_RDWR | O_CREAT, 0600);
143
144 ATF_REQUIRE(fd >= 0);
145 ATF_REQUIRE(pw != NULL);
146 ATF_REQUIRE(revoke(path) == 0);
147
148 pid = fork();
149 ATF_REQUIRE(pid >= 0);
150
151 if (pid == 0) {
152
153 if (setuid(pw->pw_uid) != 0)
154 _exit(EXIT_FAILURE);
155
156 errno = 0;
157
158 if (revoke(path) == 0)
159 _exit(EXIT_FAILURE);
160
161 if (errno != EACCES)
162 _exit(EXIT_FAILURE);
163
164 if (close(fd) != 0)
165 _exit(EXIT_FAILURE);
166
167 _exit(EXIT_SUCCESS);
168 }
169
170 (void)wait(&sta);
171
172 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
173 atf_tc_fail("revoke(2) did not obey permissions");
174
175 (void)close(fd);
176 ATF_REQUIRE(unlink(path) == 0);
177 }
178
ATF_TC_CLEANUP(revoke_perm,tc)179 ATF_TC_CLEANUP(revoke_perm, tc)
180 {
181 (void)unlink(path);
182 }
183
ATF_TP_ADD_TCS(tp)184 ATF_TP_ADD_TCS(tp)
185 {
186
187 #ifndef __OpenBSD__
188 /* OpenBSD supports revoke only on ttys */
189 ATF_TP_ADD_TC(tp, revoke_basic);
190 #endif
191 ATF_TP_ADD_TC(tp, revoke_err);
192 #ifndef __OpenBSD__
193 /* OpenBSD supports revoke only on ttys */
194 ATF_TP_ADD_TC(tp, revoke_perm);
195 #endif
196
197 return atf_no_error();
198 }
199