/* $NetBSD: t_unpriv.c,v 1.16 2018/11/28 10:01:28 hannken Exp $ */

/* $NetBSD: t_unpriv.c,v 1.16 2018/11/28 10:01:28 hannken Exp $ */

/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/stat.h>
#include <sys/time.h>

#include <atf-c.h>
#include <libgen.h>
#include <limits.h>
#include <unistd.h>

#include <rump/rump_syscalls.h>
#include <rump/rump.h>

#include "../common/h_fsmacros.h"
#include "h_macros.h"

#define USES_OWNER \
if (FSTYPE_MSDOS(tc)) \
atf_tc_skip("owner not supported by file system")

static void
owner(const atf_tc_t *tc, const char *mp)
{

USES_OWNER;

FSTEST_ENTER();

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_chown(".", 1, -1) != -1 || errno != EPERM)
atf_tc_fail_errno("chown");
if (rump_sys_chmod(".", 0000) != -1 || errno != EPERM)
atf_tc_fail_errno("chmod");
rump_pub_lwproc_releaselwp();

if (rump_sys_chown(".", 1, -1) == -1)
atf_tc_fail_errno("chown");

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_chown(".", 1, -1) == -1)
atf_tc_fail_errno("chown");
if (rump_sys_chmod(".", 0000) == -1)
atf_tc_fail_errno("chmod");
rump_pub_lwproc_releaselwp();

FSTEST_EXIT();
}

static void
dirperms(const atf_tc_t *tc, const char *mp)
{
char name[] = "dir.test/file.test";
char *dir = dirname(name);
int fd;

if (FSTYPE_SYSVBFS(tc))
atf_tc_skip("directories not supported by file system");

FSTEST_ENTER();

if (rump_sys_mkdir(dir, 0777) == -1)
atf_tc_fail_errno("mkdir");

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_open(name, O_RDWR|O_CREAT, 0666) != -1 || errno != EACCES)
atf_tc_fail_errno("open");
rump_pub_lwproc_releaselwp();

if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
atf_tc_fail_errno("open");
if (rump_sys_close(fd) == -1)
atf_tc_fail_errno("close");

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_unlink(name) != -1 || errno != EACCES)
atf_tc_fail_errno("unlink");
rump_pub_lwproc_releaselwp();

if (rump_sys_unlink(name) == -1)
atf_tc_fail_errno("unlink");

if (rump_sys_rmdir(dir) == -1)
atf_tc_fail_errno("rmdir");

FSTEST_EXIT();
}

static void
times(const atf_tc_t *tc, const char *mp)
{
const char *name = "file.test";
int fd;
unsigned int i, j;
struct timeval tmv[2];
static struct timeval tmvs[] = {
{ QUAD_MIN, 0 },
{ 0, 0 },
{ QUAD_MAX, 999999 }
};

FSTEST_ENTER();

if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
atf_tc_fail_errno("open");
if (rump_sys_close(fd) == -1)
atf_tc_fail_errno("close");

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_utimes(name, NULL) != -1 || errno != EACCES)
atf_tc_fail_errno("utimes");
rump_pub_lwproc_releaselwp();

if (rump_sys_utimes(name, NULL) == -1)
atf_tc_fail_errno("utimes");

for (i = 0; i < sizeof(tmvs) / sizeof(tmvs[0]); i++) {
for (j = 0; j < sizeof(tmvs) / sizeof(tmvs[0]); j++) {
tmv[0] = tmvs[i];
tmv[1] = tmvs[j];
rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
if (rump_sys_utimes(name, tmv) != -1 || errno != EPERM)
atf_tc_fail_errno("utimes");
rump_pub_lwproc_releaselwp();

if (rump_sys_utimes(name, tmv) == -1)
atf_tc_fail_errno("utimes");
}
}

if (rump_sys_unlink(name) == -1)
atf_tc_fail_errno("unlink");

FSTEST_EXIT();
}

static void
flags(const atf_tc_t *tc, const char *mp)
{
const char *name = "file.test";
int fd, fflags;
struct stat st;

FSTEST_ENTER();

if ((fd = rump_sys_open(name, O_RDWR|O_CREAT, 0666)) == -1)
atf_tc_fail_errno("open");
if (rump_sys_close(fd) == -1)
atf_tc_fail_errno("close");

if (rump_sys_stat(name, &st) == -1)
atf_tc_fail_errno("stat");
if (rump_sys_chflags(name, st.st_flags) == -1) {
if (errno == EOPNOTSUPP)
atf_tc_skip("file flags not supported by file system");
atf_tc_fail_errno("chflags");
}

fflags = st.st_flags | UF_NODUMP;

rump_pub_lwproc_rfork(RUMP_RFCFDG);
if (rump_sys_setuid(1) == -1)
atf_tc_fail_errno("setuid");
fflags |= UF_NODUMP;
if (rump_sys_chflags(name, fflags) != -1 || errno != EPERM)
atf_tc_fail_errno("chflags");
rump_pub_lwproc_releaselwp();

if (rump_sys_chflags(name, fflags) == -1)
atf_tc_fail_errno("chflags");

fflags &= ~UF_NODUMP;
if (rump_sys_chflags(name, fflags) == -1)
atf_tc_fail_errno("chflags");

if (rump_sys_unlink(name) == -1)
atf_tc_fail_errno("unlink");

FSTEST_EXIT();
}

ATF_TC_FSAPPLY(owner, "owner unprivileged checks");
ATF_TC_FSAPPLY(dirperms, "directory permission checks");
ATF_TC_FSAPPLY(times, "time set checks");
ATF_TC_FSAPPLY(flags, "file flags checks");

ATF_TP_ADD_TCS(tp)
{

ATF_TP_FSAPPLY(owner);
ATF_TP_FSAPPLY(dirperms);
ATF_TP_FSAPPLY(times);
ATF_TP_FSAPPLY(flags);

return atf_no_error();
}