1 /* $NetBSD: t_o_search.c,v 1.4 2013/03/17 04:46:06 jmmv Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Emmanuel Dreyfus. 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_o_search.c,v 1.4 2013/03/17 04:46:06 jmmv Exp $"); 33 34 #include <atf-c.h> 35 #include <errno.h> 36 #include <fcntl.h> 37 #include <limits.h> 38 #include <paths.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <pwd.h> 43 #include <sys/param.h> 44 45 /* 46 * dholland 20130112: disable tests that require O_SEARCH semantics 47 * until a decision is reached about the semantics of O_SEARCH and a 48 * non-broken implementation is available. 49 */ 50 #if (O_MASK & O_SEARCH) != 0 51 #define USE_O_SEARCH 52 #endif 53 54 #define DIR "dir" 55 #define FILE "dir/o_search" 56 #define BASEFILE "o_search" 57 58 59 ATF_TC(o_search_perm1); 60 ATF_TC_HEAD(o_search_perm1, tc) 61 { 62 atf_tc_set_md_var(tc, "descr", "See that openat enforces search permission"); 63 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 64 } 65 ATF_TC_BODY(o_search_perm1, tc) 66 { 67 int dfd; 68 int fd; 69 70 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 71 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 72 ATF_REQUIRE(close(fd) == 0); 73 74 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 75 76 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 77 ATF_REQUIRE(close(fd) == 0); 78 79 ATF_REQUIRE(fchmod(dfd, 644) == 0); 80 81 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) == -1); 82 ATF_REQUIRE(errno == EACCES); 83 84 ATF_REQUIRE(close(dfd) == 0); 85 } 86 87 #ifdef USE_O_SEARCH 88 89 ATF_TC(o_search_root_flag1); 90 ATF_TC_HEAD(o_search_root_flag1, tc) 91 { 92 atf_tc_set_md_var(tc, "descr", "See that root openat honours O_SEARCH"); 93 atf_tc_set_md_var(tc, "require.user", "root"); 94 } 95 ATF_TC_BODY(o_search_root_flag1, tc) 96 { 97 int dfd; 98 int fd; 99 100 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 101 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 102 ATF_REQUIRE(close(fd) == 0); 103 104 ATF_REQUIRE((dfd = open(DIR, O_RDONLY|O_SEARCH, 0)) != -1); 105 106 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 107 ATF_REQUIRE(close(fd) == 0); 108 109 ATF_REQUIRE(fchmod(dfd, 644) == 0); 110 111 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 112 ATF_REQUIRE(close(fd) == 0); 113 114 ATF_REQUIRE(fchmod(dfd, 444) == 0); 115 116 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 117 118 ATF_REQUIRE(close(dfd) == 0); 119 } 120 121 ATF_TC(o_search_unpriv_flag1); 122 ATF_TC_HEAD(o_search_unpriv_flag1, tc) 123 { 124 atf_tc_set_md_var(tc, "descr", "See that openat honours O_SEARCH"); 125 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 126 } 127 ATF_TC_BODY(o_search_unpriv_flag1, tc) 128 { 129 int dfd; 130 int fd; 131 132 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 133 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 134 ATF_REQUIRE(close(fd) == 0); 135 136 ATF_REQUIRE((dfd = open(DIR, O_RDONLY|O_SEARCH, 0)) != -1); 137 138 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 139 ATF_REQUIRE(close(fd) == 0); 140 141 ATF_REQUIRE(fchmod(dfd, 644) == 0); 142 143 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 144 ATF_REQUIRE(close(fd) == 0); 145 146 ATF_REQUIRE(fchmod(dfd, 444) == 0); 147 148 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) != -1); 149 150 ATF_REQUIRE(close(dfd) == 0); 151 } 152 153 #endif /* USE_O_SEARCH */ 154 155 ATF_TC(o_search_perm2); 156 ATF_TC_HEAD(o_search_perm2, tc) 157 { 158 atf_tc_set_md_var(tc, "descr", "See that faccessat enforces search permission"); 159 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 160 } 161 ATF_TC_BODY(o_search_perm2, tc) 162 { 163 int dfd; 164 int fd; 165 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 166 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 167 ATF_REQUIRE(close(fd) == 0); 168 169 ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1); 170 171 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 172 173 ATF_REQUIRE(fchmod(dfd, 644) == 0); 174 175 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == -1); 176 ATF_REQUIRE(errno == EACCES); 177 178 ATF_REQUIRE(close(dfd) == 0); 179 } 180 181 #ifdef USE_O_SEARCH 182 183 ATF_TC(o_search_root_flag2); 184 ATF_TC_HEAD(o_search_root_flag2, tc) 185 { 186 atf_tc_set_md_var(tc, "descr", "See that root fstatat honours O_SEARCH"); 187 atf_tc_set_md_var(tc, "require.user", "root"); 188 } 189 ATF_TC_BODY(o_search_root_flag2, tc) 190 { 191 int dfd; 192 int fd; 193 194 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 195 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 196 ATF_REQUIRE(close(fd) == 0); 197 198 ATF_REQUIRE((dfd = open(DIR, O_RDONLY|O_SEARCH, 0)) != -1); 199 200 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 201 202 ATF_REQUIRE(fchmod(dfd, 644) == 0); 203 204 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 205 206 ATF_REQUIRE(fchmod(dfd, 444) == 0); 207 208 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 209 210 ATF_REQUIRE(close(dfd) == 0); 211 } 212 213 ATF_TC(o_search_unpriv_flag2); 214 ATF_TC_HEAD(o_search_unpriv_flag2, tc) 215 { 216 atf_tc_set_md_var(tc, "descr", "See that fstatat honours O_SEARCH"); 217 atf_tc_set_md_var(tc, "require.user", "unprivileged"); 218 } 219 ATF_TC_BODY(o_search_unpriv_flag2, tc) 220 { 221 int dfd; 222 int fd; 223 224 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 225 ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1); 226 ATF_REQUIRE(close(fd) == 0); 227 228 ATF_REQUIRE((dfd = open(DIR, O_RDONLY|O_SEARCH, 0)) != -1); 229 230 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 231 232 ATF_REQUIRE(fchmod(dfd, 644) == 0); 233 234 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 235 236 ATF_REQUIRE(fchmod(dfd, 444) == 0); 237 238 ATF_REQUIRE(faccessat(dfd, BASEFILE, W_OK, 0) == 0); 239 240 ATF_REQUIRE(close(dfd) == 0); 241 } 242 243 #endif /* USE_O_SEARCH */ 244 245 246 ATF_TC(o_search_notdir); 247 ATF_TC_HEAD(o_search_notdir, tc) 248 { 249 atf_tc_set_md_var(tc, "descr", "See that openat fails with non dir fd"); 250 } 251 ATF_TC_BODY(o_search_notdir, tc) 252 { 253 int dfd; 254 int fd; 255 256 ATF_REQUIRE(mkdir(DIR, 0755) == 0); 257 ATF_REQUIRE((dfd = open(FILE, O_CREAT|O_RDWR|O_SEARCH, 0644)) != -1); 258 ATF_REQUIRE((fd = openat(dfd, BASEFILE, O_RDWR, 0)) == -1); 259 ATF_REQUIRE(errno == ENOTDIR); 260 } 261 262 ATF_TP_ADD_TCS(tp) 263 { 264 265 ATF_TP_ADD_TC(tp, o_search_perm1); 266 #ifdef USE_O_SEARCH 267 ATF_TP_ADD_TC(tp, o_search_root_flag1); 268 ATF_TP_ADD_TC(tp, o_search_unpriv_flag1); 269 #endif 270 ATF_TP_ADD_TC(tp, o_search_perm2); 271 #ifdef USE_O_SEARCH 272 ATF_TP_ADD_TC(tp, o_search_root_flag2); 273 ATF_TP_ADD_TC(tp, o_search_unpriv_flag2); 274 #endif 275 ATF_TP_ADD_TC(tp, o_search_notdir); 276 277 return atf_no_error(); 278 } 279