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freebsd-skq/tools/regression/priv/priv_vfs_read_write.c
rwatson 2f5eb093a4 Enhance and expand kernel privilege regression tests in support of 
work present in FreeBSD 7.0 to refine the kernel privilege model:

- Introduce support for jail as a testing variable, in order to
  confirm that privileges are properly restricted in the jail
  environment.

- Restructure overall testing approach so that privilege and jail
  conditions are set in the testing infrastructure before tests
  are invoked, and done so in a custom-created process to isolate
  the impact of tests from each other in a more consistent way.

- Tests now provide setup and cleanup hooks that occur before and
  after the test runs.

- New privilege tests are now present for several audit
  privileges, several credential management privileges, dmesg
  buffer reading privilege, and netinet raw socket creation.

- Other existing tests are restructured and generally improved as
  a result of better framework structure and jail as a variable.
  For exampe, we now test that certain sysctls are writable only
  outside jail, while others are writable within jail.  On a
  similar note, privileges relating to setting UFS file flags are
  now better exercised, as with the right to chmod and utimes
  files.

Approved by:	re (bmah)
Obtained from:	TrustedBSD Project
2007-09-09 23:08:39 +00:00

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/*-
* Copyright (c) 2006 nCircle Network Security, Inc.
* Copyright (c) 2007 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by Robert N. M. Watson for the TrustedBSD
* Project under contract to nCircle Network Security, Inc.
*
* 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, NCIRCLE NETWORK SECURITY,
* INC., 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.
*
* $FreeBSD$
*/
/*
* This is a joint test of both the read and write privileges with respect to
* discretionary file system access control (permissions). Only permissions,
* not ACL semantics, and only privilege-related checks are performed.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "main.h"
static char fpath_none[1024];
static char fpath_read[1024];
static char fpath_write[1024];
static char fpath_readwrite[1024];
static int fpath_none_initialized;
static int fpath_read_initialized;
static int fpath_write_initialized;
static int fpath_readwrite_initialized;
static void
try_io(const char *label, const char *fpathp, int asroot, int injail,
int flags, int expected_error, int expected_errno)
{
int fd;
fd = open(fpathp, flags);
if (fd < 0) {
if (expected_error != -1)
warnx("%s(%s, %s): expected (%d, %d) got (-1, %d)",
label, asroot ? "root" : "!root", injail ? "jail"
: "!jail", expected_error, expected_errno, errno);
} else {
if (expected_error == -1)
warnx("%s(%s, %s): expected (%d, %d) got 0", label,
asroot ? "root" : "!root", injail ? "jail" :
"!jail", expected_error, expected_errno);
(void)close(fd);
}
}
int
priv_vfs_readwrite_fowner_setup(int asroot, int injail, struct test *test)
{
setup_file("priv_vfs_readwrite_fowner_setup: fpath_none", fpath_none,
asroot ? UID_ROOT : UID_OWNER, GID_OTHER, 0000);
fpath_none_initialized = 1;
setup_file("priv_vfs_readwrite_fowner_setup: fpath_read", fpath_read,
asroot ? UID_ROOT : UID_OWNER, GID_OTHER, 0400);
fpath_read_initialized = 1;
setup_file("priv_vfs_readwrite_fowner_setup: fpath_write",
fpath_write, asroot ? UID_ROOT : UID_OWNER, GID_OTHER, 0200);
fpath_write_initialized = 1;
setup_file("priv_vfs_readwrite_fowner_setup: fpath_readwrite",
fpath_readwrite, asroot ? UID_ROOT : UID_OWNER, GID_OTHER, 0600);
fpath_readwrite_initialized = 1;
return (0);
}
int
priv_vfs_readwrite_fgroup_setup(int asroot, int injail, struct test *test)
{
setup_file("priv_vfs_readwrite_fgroup_setup: fpath_none", fpath_none,
UID_OTHER, asroot ? GID_WHEEL : GID_OWNER, 0000);
fpath_none_initialized = 1;
setup_file("priv_vfs_readwrite_fgroup_setup: fpath_read", fpath_read,
UID_OTHER, asroot ? GID_WHEEL : GID_OWNER, 0040);
fpath_read_initialized = 1;
setup_file("priv_vfs_readwrite_fgroup_setup: fpath_write",
fpath_write, UID_OTHER, asroot ? GID_WHEEL : GID_OWNER, 0020);
fpath_write_initialized = 1;
setup_file("priv_vfs_readwrite_fgroup_setup: fpath_readwrite",
fpath_readwrite, UID_OTHER, asroot ? GID_WHEEL : GID_OWNER,
0060);
fpath_readwrite_initialized = 1;
return (0);
}
int
priv_vfs_readwrite_fother_setup(int asroot, int injail, struct test *test)
{
setup_file("priv_vfs_readwrite_fother_setup: fpath_none", fpath_none,
UID_OTHER, GID_OTHER, 0000);
fpath_none_initialized = 1;
setup_file("priv_vfs_readwrite_fother_setup: fpath_read", fpath_read,
UID_OTHER, GID_OTHER, 0004);
fpath_read_initialized = 1;
setup_file("priv_vfs_readwrite_fother_setup: fpath_write",
fpath_write, UID_OTHER, GID_OTHER, 0002);
fpath_write_initialized = 1;
setup_file("priv_vfs_readwrite_fother_setup: fpath_readwrite",
fpath_readwrite, UID_OTHER, GID_OTHER, 0006);
fpath_readwrite_initialized = 1;
return (0);
}
void
priv_vfs_readwrite_fowner(int asroot, int injail, struct test *test)
{
try_io("priv_vfs_readwrite_fowner(none, O_RDONLY)", fpath_none,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(none, O_WRONLY)", fpath_none,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(none, O_RDWR)", fpath_none,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(read, O_RDONLY)", fpath_read,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fowner(read, O_WRONLY)", fpath_read,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(read, O_RDWR)", fpath_read,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(write, O_RDONLY)", fpath_write,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(write, O_WRONLY)", fpath_write,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fowner(write, O_RDWR)", fpath_write,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fowner(write, O_RDONLY)", fpath_readwrite,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fowner(write, O_WRONLY)", fpath_readwrite,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fowner(write, O_RDWR)", fpath_readwrite,
asroot, injail, O_RDWR, 0, 0);
}
void
priv_vfs_readwrite_fgroup(int asroot, int injail, struct test *test)
{
try_io("priv_vfs_readwrite_fgroup(none, O_RDONLY)", fpath_none,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(none, O_WRONLY)", fpath_none,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(none, O_RDWR)", fpath_none,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(read, O_RDONLY)", fpath_read,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fgroup(read, O_WRONLY)", fpath_read,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(read, O_RDWR)", fpath_read,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(write, O_RDONLY)", fpath_write,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(write, O_WRONLY)", fpath_write,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fgroup(write, O_RDWR)", fpath_write,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fgroup(write, O_RDONLY)", fpath_readwrite,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fgroup(write, O_WRONLY)", fpath_readwrite,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fgroup(write, O_RDWR)", fpath_readwrite,
asroot, injail, O_RDWR, 0, 0);
}
void
priv_vfs_readwrite_fother(int asroot, int injail, struct test *test)
{
try_io("priv_vfs_readwrite_fother(none, O_RDONLY)", fpath_none,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(none, O_WRONLY)", fpath_none,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(none, O_RDWR)", fpath_none,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(read, O_RDONLY)", fpath_read,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fother(read, O_WRONLY)", fpath_read,
asroot, injail, O_WRONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(read, O_RDWR)", fpath_read,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(write, O_RDONLY)", fpath_write,
asroot, injail, O_RDONLY, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(write, O_WRONLY)", fpath_write,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fother(write, O_RDWR)", fpath_write,
asroot, injail, O_RDWR, asroot ? 0 : -1, EACCES);
try_io("priv_vfs_readwrite_fother(write, O_RDONLY)", fpath_readwrite,
asroot, injail, O_RDONLY, 0, 0);
try_io("priv_vfs_readwrite_fother(write, O_WRONLY)", fpath_readwrite,
asroot, injail, O_WRONLY, 0, 0);
try_io("priv_vfs_readwrite_fother(write, O_RDWR)", fpath_readwrite,
asroot, injail, O_RDWR, 0, 0);
}
void
priv_vfs_readwrite_cleanup(int asroot, int injail, struct test *test)
{
if (fpath_none_initialized) {
(void)unlink(fpath_none);
fpath_none_initialized = 0;
}
if (fpath_read_initialized) {
(void)unlink(fpath_read);
fpath_read_initialized = 0;
}
if (fpath_write_initialized) {
(void)unlink(fpath_write);
fpath_write_initialized = 0;
}
if (fpath_readwrite_initialized) {
(void)unlink(fpath_readwrite);
fpath_readwrite_initialized = 0;
}
}
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