1 /*- 2 * Copyright (c) 2018 Aniket Pandey 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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 * SUCH DAMAGE. 24 */ 25 26 /* 27 * Note: open(2) and openat(2) have 12 events each for various values of 'flag' 28 * Please see: contrib/openbsm/etc/audit_event#L261 29 * 30 * 270:AUE_OPENAT_R:openat(2) - read:fr 31 * 271:AUE_OPENAT_RC:openat(2) - read,creat:fc,fr,fa,fm 32 * 272:AUE_OPENAT_RT:openat(2) - read,trunc:fd,fr,fa,fm 33 * 273:AUE_OPENAT_RTC:openat(2) - read,creat,trunc:fc,fd,fr,fa,fm 34 * 274:AUE_OPENAT_W:openat(2) - write:fw 35 * 275:AUE_OPENAT_WC:openat(2) - write,creat:fc,fw,fa,fm 36 * 276:AUE_OPENAT_WT:openat(2) - write,trunc:fd,fw,fa,fm 37 * 277:AUE_OPENAT_WTC:openat(2) - write,creat,trunc:fc,fd,fw,fa,fm 38 * 278:AUE_OPENAT_RW:openat(2) - read,write:fr,fw 39 * 279:AUE_OPENAT_RWC:openat(2) - read,write,create:fc,fw,fr,fa,fm 40 * 280:AUE_OPENAT_RWT:openat(2) - read,write,trunc:fd,fw,fr,fa,fm 41 * 281:AUE_OPENAT_RWTC:openat(2) - read,write,creat,trunc:fc,fd,fw,fr,fa,fm 42 */ 43 44 #include <sys/syscall.h> 45 46 #include <atf-c.h> 47 #include <fcntl.h> 48 49 #include "utils.h" 50 51 static struct pollfd fds[1]; 52 static mode_t o_mode = 0777; 53 static int filedesc; 54 static char extregex[80]; 55 static const char *path = "fileforaudit"; 56 static const char *errpath = "adirhasnoname/fileforaudit"; 57 58 /* 59 * Define test-cases for success and failure modes of both open(2) and openat(2) 60 */ 61 #define OPEN_AT_TC_DEFINE(mode, regex, flag, class) \ 62 ATF_TC_WITH_CLEANUP(open_ ## mode ## _success); \ 63 ATF_TC_HEAD(open_ ## mode ## _success, tc) \ 64 { \ 65 atf_tc_set_md_var(tc, "descr", "Tests the audit of a successful " \ 66 "open(2) call with flags = %s", #flag); \ 67 } \ 68 ATF_TC_BODY(open_ ## mode ## _success, tc) \ 69 { \ 70 snprintf(extregex, sizeof(extregex), \ 71 "open.*%s.*fileforaudit.*return,success", regex); \ 72 /* File needs to exist for successful open(2) invocation */ \ 73 ATF_REQUIRE((filedesc = open(path, O_CREAT, o_mode)) != -1); \ 74 FILE *pipefd = setup(fds, class); \ 75 ATF_REQUIRE(syscall(SYS_open, path, flag) != -1); \ 76 check_audit(fds, extregex, pipefd); \ 77 close(filedesc); \ 78 } \ 79 ATF_TC_CLEANUP(open_ ## mode ## _success, tc) \ 80 { \ 81 cleanup(); \ 82 } \ 83 ATF_TC_WITH_CLEANUP(open_ ## mode ## _failure); \ 84 ATF_TC_HEAD(open_ ## mode ## _failure, tc) \ 85 { \ 86 atf_tc_set_md_var(tc, "descr", "Tests the audit of an unsuccessful " \ 87 "open(2) call with flags = %s", #flag); \ 88 } \ 89 ATF_TC_BODY(open_ ## mode ## _failure, tc) \ 90 { \ 91 snprintf(extregex, sizeof(extregex), \ 92 "open.*%s.*fileforaudit.*return,failure", regex); \ 93 FILE *pipefd = setup(fds, class); \ 94 ATF_REQUIRE_EQ(-1, syscall(SYS_open, errpath, flag)); \ 95 check_audit(fds, extregex, pipefd); \ 96 } \ 97 ATF_TC_CLEANUP(open_ ## mode ## _failure, tc) \ 98 { \ 99 cleanup(); \ 100 } \ 101 ATF_TC_WITH_CLEANUP(openat_ ## mode ## _success); \ 102 ATF_TC_HEAD(openat_ ## mode ## _success, tc) \ 103 { \ 104 atf_tc_set_md_var(tc, "descr", "Tests the audit of a successful " \ 105 "openat(2) call with flags = %s", #flag); \ 106 } \ 107 ATF_TC_BODY(openat_ ## mode ## _success, tc) \ 108 { \ 109 int filedesc2; \ 110 snprintf(extregex, sizeof(extregex), \ 111 "openat.*%s.*fileforaudit.*return,success", regex); \ 112 /* File needs to exist for successful openat(2) invocation */ \ 113 ATF_REQUIRE((filedesc = open(path, O_CREAT, o_mode)) != -1); \ 114 FILE *pipefd = setup(fds, class); \ 115 ATF_REQUIRE((filedesc2 = openat(AT_FDCWD, path, flag)) != -1); \ 116 check_audit(fds, extregex, pipefd); \ 117 close(filedesc2); \ 118 close(filedesc); \ 119 } \ 120 ATF_TC_CLEANUP(openat_ ## mode ## _success, tc) \ 121 { \ 122 cleanup(); \ 123 } \ 124 ATF_TC_WITH_CLEANUP(openat_ ## mode ## _failure); \ 125 ATF_TC_HEAD(openat_ ## mode ## _failure, tc) \ 126 { \ 127 atf_tc_set_md_var(tc, "descr", "Tests the audit of an unsuccessful " \ 128 "openat(2) call with flags = %s", #flag); \ 129 } \ 130 ATF_TC_BODY(openat_ ## mode ## _failure, tc) \ 131 { \ 132 snprintf(extregex, sizeof(extregex), \ 133 "openat.*%s.*fileforaudit.*return,failure", regex); \ 134 FILE *pipefd = setup(fds, class); \ 135 ATF_REQUIRE_EQ(-1, openat(AT_FDCWD, errpath, flag)); \ 136 check_audit(fds, extregex, pipefd); \ 137 } \ 138 ATF_TC_CLEANUP(openat_ ## mode ## _failure, tc) \ 139 { \ 140 cleanup(); \ 141 } 142 143 /* 144 * Add both success and failure modes of open(2) and openat(2) 145 */ 146 #define OPEN_AT_TC_ADD(tp, mode) \ 147 do { \ 148 ATF_TP_ADD_TC(tp, open_ ## mode ## _success); \ 149 ATF_TP_ADD_TC(tp, open_ ## mode ## _failure); \ 150 ATF_TP_ADD_TC(tp, openat_ ## mode ## _success); \ 151 ATF_TP_ADD_TC(tp, openat_ ## mode ## _failure); \ 152 } while (0) 153 154 155 /* 156 * Each of the 12 OPEN_AT_TC_DEFINE statement is a group of 4 test-cases 157 * corresponding to separate audit events for open(2) and openat(2) 158 */ 159 OPEN_AT_TC_DEFINE(read, "read", O_RDONLY, "fr") 160 OPEN_AT_TC_DEFINE(read_creat, "read,creat", O_RDONLY | O_CREAT, "fr") 161 OPEN_AT_TC_DEFINE(read_trunc, "read,trunc", O_RDONLY | O_TRUNC, "fr") 162 OPEN_AT_TC_DEFINE(read_creat_trunc, "read,creat,trunc", O_RDONLY | O_CREAT 163 | O_TRUNC, "fr") 164 OPEN_AT_TC_DEFINE(write, "write", O_WRONLY, "fw") 165 OPEN_AT_TC_DEFINE(write_creat, "write,creat", O_WRONLY | O_CREAT, "fw") 166 OPEN_AT_TC_DEFINE(write_trunc, "write,trunc", O_WRONLY | O_TRUNC, "fw") 167 OPEN_AT_TC_DEFINE(write_creat_trunc, "write,creat,trunc", O_WRONLY | O_CREAT 168 | O_TRUNC, "fw") 169 OPEN_AT_TC_DEFINE(read_write, "read,write", O_RDWR, "fr") 170 OPEN_AT_TC_DEFINE(read_write_creat, "read,write,creat", O_RDWR | O_CREAT, "fw") 171 OPEN_AT_TC_DEFINE(read_write_trunc, "read,write,trunc", O_RDWR | O_TRUNC, "fr") 172 OPEN_AT_TC_DEFINE(read_write_creat_trunc, "read,write,creat,trunc", O_RDWR | 173 O_CREAT | O_TRUNC, "fw") 174 175 176 ATF_TP_ADD_TCS(tp) 177 { 178 OPEN_AT_TC_ADD(tp, read); 179 OPEN_AT_TC_ADD(tp, read_creat); 180 OPEN_AT_TC_ADD(tp, read_trunc); 181 OPEN_AT_TC_ADD(tp, read_creat_trunc); 182 183 OPEN_AT_TC_ADD(tp, write); 184 OPEN_AT_TC_ADD(tp, write_creat); 185 OPEN_AT_TC_ADD(tp, write_trunc); 186 OPEN_AT_TC_ADD(tp, write_creat_trunc); 187 188 OPEN_AT_TC_ADD(tp, read_write); 189 OPEN_AT_TC_ADD(tp, read_write_creat); 190 OPEN_AT_TC_ADD(tp, read_write_trunc); 191 OPEN_AT_TC_ADD(tp, read_write_creat_trunc); 192 193 return (atf_no_error()); 194 } 195