xref: /freebsd-11-stable/tools/regression/priv/priv_vfs_setgid.c

/*-
 * 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 that privilege is required to set the sgid bit on a file with a group
 * that isn't in the process credential.  The file uid owner is set to the
 * uid being tested with, as we are not interested in testing privileges
 * associated with file ownership.
 */

#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>

#include "main.h"

static char fpath[1024];
static int fpath_initialized;

int
priv_vfs_setgid_fowner_setup(int asroot, int injail, struct test *test)
{

	setup_file("priv_vfs_setgid_fowner: fpath", fpath, UID_OWNER,
	    GID_OWNER, 0600);
	fpath_initialized = 1;
	return (0);
}

int
priv_vfs_setgid_fother_setup(int asroot, int injail, struct test *test)
{

	/* NOTE: owner uid, *other* gid. */
	setup_file("priv_vfs_setgid_forther: fpath", fpath, UID_OWNER,
	    GID_OTHER, 0600);
	fpath_initialized = 1;
	return (0);
}

void
priv_vfs_setgid_fowner(int asroot, int injail, struct test *test)
{
	int error;

	error = chmod(fpath, 0600 | S_ISGID);
	if (asroot && injail)
		expect("priv_vfs_setgid_fowner(asroot, injail)", error, 0,
		    0);
	if (asroot && !injail)
		expect("priv_vfs_setgid_fowner(asroot, !injail)", error, 0,
		    0);
	if (!asroot && injail)
		expect("priv_vfs_setgid_fowner(!asroot, injail)", error, 0,
		    0);
	if (!asroot && !injail)
		expect("priv_vfs_setgid_fowner(!asroot, !injail)", error, 0,
		    0);
}

void
priv_vfs_setgid_fother(int asroot, int injail, struct test *test)
{
	int error;

	error = chmod(fpath, 0600 | S_ISGID);
	if (asroot && injail)
		expect("priv_vfs_setgid_fother(asroot, injail)", error, 0,
		    0);
	if (asroot && !injail)
		expect("priv_vfs_setgid_fother(asroot, !injail)", error, 0,
		    0);
	if (!asroot && injail)
		expect("priv_vfs_setgid_fother(!asroot, injail)", error, -1,
		    EPERM);
	if (!asroot && !injail)
		expect("priv_vfs_setgid_fother(!asroot, !injail)", error, -1,
		    EPERM);
}

void
priv_vfs_setgid_cleanup(int asroot, int injail, struct test *test)
{

	if (fpath_initialized) {
		(void)unlink(fpath);
		fpath_initialized = 0;
	}
}