diff options
Diffstat (limited to 'tests/sys/vfs/lookup_cap_dotdot.c')
| -rw-r--r-- | tests/sys/vfs/lookup_cap_dotdot.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/tests/sys/vfs/lookup_cap_dotdot.c b/tests/sys/vfs/lookup_cap_dotdot.c new file mode 100644 index 000000000000..fa26a13568ca --- /dev/null +++ b/tests/sys/vfs/lookup_cap_dotdot.c @@ -0,0 +1,272 @@ +/*- + * Copyright (c) 2016 Ed Maste <emaste@FreeBSD.org> + * Copyright (c) 2016 Conrad Meyer <cem@FreeBSD.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/capsicum.h> +#include <sys/sysctl.h> +#include <sys/stat.h> + +#include <atf-c.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> + +#include "freebsd_test_suite/macros.h" + +static int dirfd = -1; +static char *abspath; + +static void +touchat(int _dirfd, const char *name) +{ + int fd; + + ATF_REQUIRE((fd = openat(_dirfd, name, O_CREAT | O_TRUNC | O_WRONLY, + 0777)) >= 0); + ATF_REQUIRE(close(fd) == 0); +} + +static void +prepare_dotdot_tests(void) +{ + char cwd[MAXPATHLEN]; + + ATF_REQUIRE(getcwd(cwd, sizeof(cwd)) != NULL); + asprintf(&abspath, "%s/testdir/d1/f1", cwd); + + ATF_REQUIRE(mkdir("testdir", 0777) == 0); + ATF_REQUIRE((dirfd = open("testdir", O_RDONLY)) >= 0); + + ATF_REQUIRE(mkdirat(dirfd, "d1", 0777) == 0); + ATF_REQUIRE(mkdirat(dirfd, "d1/d2", 0777) == 0); + ATF_REQUIRE(mkdirat(dirfd, "d1/d2/d3", 0777) == 0); + touchat(dirfd, "d1/f1"); + touchat(dirfd, "d1/d2/f2"); + touchat(dirfd, "d1/d2/d3/f3"); + ATF_REQUIRE(symlinkat("d1/d2/d3", dirfd, "l3") == 0); + ATF_REQUIRE(symlinkat("../testdir/d1", dirfd, "lup") == 0); + ATF_REQUIRE(symlinkat("../..", dirfd, "d1/d2/d3/ld1") == 0); + ATF_REQUIRE(symlinkat("../../f1", dirfd, "d1/d2/d3/lf1") == 0); +} + +static void +check_capsicum(void) +{ + ATF_REQUIRE_FEATURE("security_capabilities"); + ATF_REQUIRE_FEATURE("security_capability_mode"); + ATF_REQUIRE_SYSCTL_BOOL("kern.trap_enotcap", false); +} + +/* + * Positive tests + */ +ATF_TC(openat__basic_positive); +ATF_TC_HEAD(openat__basic_positive, tc) +{ + atf_tc_set_md_var(tc, "descr", "Basic positive openat testcases"); +} + +ATF_TC_BODY(openat__basic_positive, tc) +{ + prepare_dotdot_tests(); + + ATF_REQUIRE(openat(dirfd, "d1/d2/d3/f3", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "d1/d2/d3/../../f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/f3", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/../../f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "../testdir/d1/f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "lup/f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/ld1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/lf1", O_RDONLY) >= 0); + ATF_REQUIRE(open(abspath, O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, abspath, O_RDONLY) >= 0); +} + +ATF_TC(lookup_cap_dotdot__basic); +ATF_TC_HEAD(lookup_cap_dotdot__basic, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Validate cap-mode (testdir)/d1/.. lookup"); +} + +ATF_TC_BODY(lookup_cap_dotdot__basic, tc) +{ + cap_rights_t rights; + + check_capsicum(); + prepare_dotdot_tests(); + + cap_rights_init(&rights, CAP_LOOKUP, CAP_READ); + ATF_REQUIRE(cap_rights_limit(dirfd, &rights) >= 0); + + ATF_REQUIRE(cap_enter() >= 0); + + ATF_REQUIRE_MSG(openat(dirfd, "d1/..", O_RDONLY) >= 0, "%s", + strerror(errno)); +} + +ATF_TC(lookup_cap_dotdot__advanced); +ATF_TC_HEAD(lookup_cap_dotdot__advanced, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Validate cap-mode (testdir)/d1/.. lookup"); +} + +ATF_TC_BODY(lookup_cap_dotdot__advanced, tc) +{ + cap_rights_t rights; + + check_capsicum(); + prepare_dotdot_tests(); + + cap_rights_init(&rights, CAP_LOOKUP, CAP_READ); + ATF_REQUIRE(cap_rights_limit(dirfd, &rights) >= 0); + + ATF_REQUIRE(cap_enter() >= 0); + + ATF_REQUIRE(openat(dirfd, "d1/d2/d3/../../f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/../../f1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/ld1", O_RDONLY) >= 0); + ATF_REQUIRE(openat(dirfd, "l3/lf1", O_RDONLY) >= 0); +} + +/* + * Negative tests + */ +ATF_TC(openat__basic_negative); +ATF_TC_HEAD(openat__basic_negative, tc) +{ + atf_tc_set_md_var(tc, "descr", "Basic negative openat testcases"); +} + +ATF_TC_BODY(openat__basic_negative, tc) +{ + prepare_dotdot_tests(); + + ATF_REQUIRE_ERRNO(ENOENT, + openat(dirfd, "does-not-exist", O_RDONLY) < 0); + ATF_REQUIRE_ERRNO(ENOENT, + openat(dirfd, "l3/does-not-exist", O_RDONLY) < 0); +} + +ATF_TC(capmode__negative); +ATF_TC_HEAD(capmode__negative, tc) +{ + atf_tc_set_md_var(tc, "descr", "Negative Capability mode testcases"); +} + +ATF_TC_BODY(capmode__negative, tc) +{ + int subdirfd; + + check_capsicum(); + prepare_dotdot_tests(); + + ATF_REQUIRE(cap_enter() == 0); + + /* open() not permitted in capability mode */ + ATF_REQUIRE_ERRNO(ECAPMODE, open("testdir", O_RDONLY) < 0); + + /* AT_FDCWD not permitted in capability mode */ + ATF_REQUIRE_ERRNO(ECAPMODE, openat(AT_FDCWD, "d1/f1", O_RDONLY) < 0); + + /* Relative path above dirfd not capable */ + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "..", O_RDONLY) < 0); + ATF_REQUIRE((subdirfd = openat(dirfd, "l3", O_RDONLY)) >= 0); + ATF_REQUIRE_ERRNO(ENOTCAPABLE, + openat(subdirfd, "../../f1", O_RDONLY) < 0); + + /* Absolute paths not capable */ + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, abspath, O_RDONLY) < 0); + + /* Symlink above dirfd */ + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "lup/f1", O_RDONLY) < 0); +} + +ATF_TC(lookup_cap_dotdot__negative); +ATF_TC_HEAD(lookup_cap_dotdot__negative, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Validate cap-mode (testdir)/.. lookup fails"); +} + +ATF_TC_BODY(lookup_cap_dotdot__negative, tc) +{ + cap_rights_t rights; + + check_capsicum(); + prepare_dotdot_tests(); + + cap_rights_init(&rights, CAP_LOOKUP, CAP_READ); + ATF_REQUIRE(cap_rights_limit(dirfd, &rights) >= 0); + + ATF_REQUIRE(cap_enter() >= 0); + + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "..", O_RDONLY) < 0); + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "d1/../..", O_RDONLY) < 0); + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dirfd, "../testdir/d1/f1", O_RDONLY) < 0); +} + +ATF_TC(lookup_cap_dotdot__root); +ATF_TC_HEAD(lookup_cap_dotdot__root, tc) +{ + atf_tc_set_md_var(tc, "descr", "Validate cap-mode /.. lookup fails"); +} + +ATF_TC_BODY(lookup_cap_dotdot__root, tc) +{ + int dfd, dfd2; + + check_capsicum(); + + dfd = open("/", O_DIRECTORY); + ATF_REQUIRE(dfd >= 0); + + dfd2 = openat(dfd, "..", O_DIRECTORY); + ATF_REQUIRE(dfd2 >= 0); + ATF_REQUIRE(close(dfd2) == 0); + + ATF_REQUIRE(cap_enter() >= 0); + + dfd2 = openat(dfd, "..", O_DIRECTORY); + ATF_REQUIRE_ERRNO(ENOTCAPABLE, openat(dfd, "..", O_DIRECTORY)); +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, openat__basic_positive); + ATF_TP_ADD_TC(tp, openat__basic_negative); + + ATF_TP_ADD_TC(tp, capmode__negative); + + ATF_TP_ADD_TC(tp, lookup_cap_dotdot__basic); + ATF_TP_ADD_TC(tp, lookup_cap_dotdot__advanced); + ATF_TP_ADD_TC(tp, lookup_cap_dotdot__negative); + ATF_TP_ADD_TC(tp, lookup_cap_dotdot__root); + + return (atf_no_error()); +} |