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freebsd-skq/tools/regression/priv/priv_vfs_chflags.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.
*
* $FreeBSD$
*/
/*
* Test privileges associated with setting file flags on files; whether or
* not it requires privilege depends on the flag, and some flags cannot be
* set in jail at all.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "main.h"
static char fpath[1024];
static int fpath_initialized;
/*
* For chflags, we consider three dimmensions: process owner, file owner, and
* flag type. The calling framework handles variations in process owner; the
* rest are handled via multiple tests. One cleanup function is used.
*/
static u_long
getflags(char *fpathp)
{
struct stat sb;
if (stat(fpathp, &sb) < 0)
err(-1, "stat(%s)", fpathp);
return (sb.st_flags);
}
int
priv_vfs_chflags_froot_setup(int asroot, int injail, struct test *test)
{
setup_file("priv_vfs_chflags_froot_setup: fpath", fpath, UID_ROOT,
GID_WHEEL, 0600);
fpath_initialized = 1;
return (0);
}
int
priv_vfs_chflags_fowner_setup(int asroot, int injail,
struct test *test)
{
setup_file("priv_vfs_chflags_fowner_setup: fpath", fpath, UID_OWNER,
GID_OWNER, 0600);
fpath_initialized = 1;
return (0);
}
int
priv_vfs_chflags_fother_setup(int asroot, int injail,
struct test *test)
{
setup_file("priv_vfs_chflags_fowner_setup: fpath", fpath, UID_OTHER,
GID_OTHER, 0600);
fpath_initialized = 1;
return (0);
}
void
priv_vfs_chflags_froot_uflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= UF_NODUMP;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_froot_uflags(asroot, injail)",
error, 0, 0);
if (asroot && !injail)
expect("priv_vfs_chflags_froot_uflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_froot_uflags(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_vfs_chflags_froot_uflags(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_vfs_chflags_fowner_uflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= UF_NODUMP;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_fowner_uflags(asroot, injail)",
error, 0, 0);
if (asroot && !injail)
expect("priv_vfs_chflags_fowner_uflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_fowner_uflags(!asroot, injail)",
error, 0, 0);
if (!asroot && !injail)
expect("priv_vfs_chflags_fowner_uflags(!asroot, !injail)",
error, 0, 0);
}
void
priv_vfs_chflags_fother_uflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= UF_NODUMP;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_fother_uflags(asroot, injail)",
error, 0, 0);
if (asroot && !injail)
expect("priv_vfs_chflags_fother_uflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_fother_uflags(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_vfs_chflags_fother_uflags(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_vfs_chflags_froot_sflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= SF_ARCHIVED;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_froot_sflags(asroot, injail)",
error, -1, EPERM);
if (asroot && !injail)
expect("priv_vfs_chflags_froot_sflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_froot_sflags(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_vfs_chflags_froot_sflags(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_vfs_chflags_fowner_sflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= SF_ARCHIVED;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_fowner_sflags(asroot, injail)",
error, -1, EPERM);
if (asroot && !injail)
expect("priv_vfs_chflags_fowner_sflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_fowner_sflags(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_vfs_chflags_fowner_sflags(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_vfs_chflags_fother_sflags(int asroot, int injail,
struct test *test)
{
u_long flags;
int error;
flags = getflags(fpath);
flags |= SF_ARCHIVED;
error = chflags(fpath, flags);
if (asroot && injail)
expect("priv_vfs_chflags_fother_sflags(asroot, injail)",
error, -1, EPERM);
if (asroot && !injail)
expect("priv_vfs_chflags_fother_sflags(asroot, !injail)",
error, 0, 0);
if (!asroot && injail)
expect("priv_vfs_chflags_fother_sflags(!asroot, injail)",
error, -1, EPERM);
if (!asroot && !injail)
expect("priv_vfs_chflags_fother_sflags(!asroot, !injail)",
error, -1, EPERM);
}
void
priv_vfs_chflags_cleanup(int asroot, int injail, struct test *test)
{
if (fpath_initialized) {
(void)chflags(fpath, 0);
(void)unlink(fpath);
fpath_initialized = 0;
}
}
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