1 /* $NetBSD: t_setuid.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: t_setuid.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $");
33
34 #include <sys/wait.h>
35
36 #include <atf-c.h>
37 #include <errno.h>
38 #include <pwd.h>
39 #include <stdlib.h>
40 #include <unistd.h>
41
42 ATF_TC(setuid_perm);
ATF_TC_HEAD(setuid_perm,tc)43 ATF_TC_HEAD(setuid_perm, tc)
44 {
45 atf_tc_set_md_var(tc, "descr", "Test setuid(0) as normal user");
46 atf_tc_set_md_var(tc, "require.user", "unprivileged");
47 }
48
ATF_TC_BODY(setuid_perm,tc)49 ATF_TC_BODY(setuid_perm, tc)
50 {
51 errno = 0;
52
53 ATF_REQUIRE(setuid(0) == -1);
54 ATF_REQUIRE(errno == EPERM);
55 }
56
57 ATF_TC(setuid_real);
ATF_TC_HEAD(setuid_real,tc)58 ATF_TC_HEAD(setuid_real, tc)
59 {
60 atf_tc_set_md_var(tc, "descr", "Test setuid(2) with real UID");
61 }
62
ATF_TC_BODY(setuid_real,tc)63 ATF_TC_BODY(setuid_real, tc)
64 {
65 uid_t uid = getuid();
66
67 ATF_REQUIRE(setuid(uid) == 0);
68
69 ATF_REQUIRE(getuid() == uid);
70 ATF_REQUIRE(geteuid() == uid);
71 }
72
73 ATF_TC(setuid_root);
ATF_TC_HEAD(setuid_root,tc)74 ATF_TC_HEAD(setuid_root, tc)
75 {
76 atf_tc_set_md_var(tc, "descr", "A basic test of setuid(2)");
77 atf_tc_set_md_var(tc, "require.user", "root");
78 }
79
ATF_TC_BODY(setuid_root,tc)80 ATF_TC_BODY(setuid_root, tc)
81 {
82 struct passwd *pw;
83 int rv, sta;
84 pid_t pid;
85 uid_t uid;
86
87 while ((pw = getpwent()) != NULL) {
88
89 pid = fork();
90 ATF_REQUIRE(pid >= 0);
91
92 if (pid == 0) {
93
94 rv = setuid(pw->pw_uid);
95
96 if (rv != 0)
97 _exit(EXIT_FAILURE);
98
99 uid = getuid();
100
101 if (uid != pw->pw_uid)
102 _exit(EXIT_FAILURE);
103
104 _exit(EXIT_SUCCESS);
105 }
106
107 (void)wait(&sta);
108
109 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
110 atf_tc_fail("failed to change UID to %u", pw->pw_uid);
111 }
112 }
113
ATF_TP_ADD_TCS(tp)114 ATF_TP_ADD_TCS(tp)
115 {
116
117 ATF_TP_ADD_TC(tp, setuid_perm);
118 ATF_TP_ADD_TC(tp, setuid_real);
119 ATF_TP_ADD_TC(tp, setuid_root);
120
121 return atf_no_error();
122 }
123