priv_vfs_extattr_system.c revision 162271 
1/*-
2 * Copyright (c) 2006 nCircle Network Security, Inc.
3 * All rights reserved.
4 *
5 * This software was developed by Robert N. M. Watson for the TrustedBSD
6 * Project under contract to nCircle Network Security, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
21 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
23 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: head/tools/regression/priv/priv_vfs_extattr_system.c 162271 2006-09-13 09:05:39Z rwatson $
30 */
31
32/*
33 * Test that privilege is required to write to the system extended attribute
34 * namespace.
35 */
36
37#include <sys/types.h>
38#include <sys/extattr.h>
39
40#include <err.h>
41#include <errno.h>
42#include <string.h>
43#include <unistd.h>
44
45#include "main.h"
46
47#define	EA_NAMESPACE	EXTATTR_NAMESPACE_SYSTEM
48#define	EA_NAME		"test"
49#define	EA_DATA		"test"
50#define	EA_SIZE		strlen(EA_DATA)
51
52void
53priv_vfs_extattr_system(void)
54{
55	char fpath[1024];
56	int error;
57
58	assert_root();
59
60	/*
61	 * Set file perms so that discretionary access control would grant
62	 * write rights on non-system EAs on the file.
63	 */
64	setup_file(fpath, UID_ROOT, GID_WHEEL, 0666);
65
66	/*
67	 * Try with privilege.
68	 */
69	if (extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA, EA_SIZE)
70	    < 0) {
71		warn("extattr_set_file(SYSTEM, %s, %s, %d) as root",
72		    EA_NAME, EA_DATA, EA_SIZE);
73		goto out;
74	}
75
76	set_euid(UID_OTHER);
77
78	/*
79	 * Try without privilege.
80	 */
81	error = extattr_set_file(fpath, EA_NAMESPACE, EA_NAME, EA_DATA,
82	   EA_SIZE);
83	if (error == 0) {
84		warn("extattr_set_file(SYSTEM, %s, %s, %d) succeeded as !root",
85		    EA_NAME, EA_DATA, EA_SIZE);
86		goto out;
87	}
88	if (errno != EPERM) {
89		warn("extattr_set_file(SYSTEM, %s, %s, %d) wrong errno %d "
90		    "as !root", EA_NAME, EA_DATA, EA_SIZE, errno);
91		goto out;
92	}
93out:
94	seteuid(UID_ROOT);
95	(void)unlink(fpath);
96}
97