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); 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 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); 58 ATF_TC_HEAD(setuid_real, tc) 59 { 60 atf_tc_set_md_var(tc, "descr", "Test setuid(2) with real UID"); 61 } 62 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); 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 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 } 113 114 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