250 lines
7.0 KiB
C
250 lines
7.0 KiB
C
/*-
|
|
* 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/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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_INT("kern.trap_enotcap", 0);
|
|
}
|
|
|
|
/*
|
|
* 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_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);
|
|
|
|
return (atf_no_error());
|
|
}
|