1/*-
2 * Copyright (c) 2006 nCircle Network Security, Inc.
3 * Copyright (c) 2007 Robert N. M. Watson
4 * All rights reserved.
5 *
6 * This software was developed by Robert N. M. Watson for the TrustedBSD
7 * Project under contract to nCircle Network Security, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
22 * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
24 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32
33/*
34 * Two privileges exist for writing sysctls -- one for sysctls writable only
35 * outside of jail (PRIV_SYSCTL_WRITE) and one for those also writable inside
36 * jail (PRIV_SYSCTL_WRITEJAIL).
37 *
38 * Test the prior by attempting to write to kern.domainname, and the latter
39 * by attempting to write to kern.hostname.
40 */
41
42#include <sys/types.h>
43#include <sys/sysctl.h>
44
45#include <err.h>
46#include <errno.h>
47#include <string.h>
48#include <unistd.h>
49
50#include "main.h"
51
52#define KERN_HOSTNAME_STRING	"kern.hostname"
53#define	KERN_DOMAINNAME_STRING	"kern.domainname"
54
55static char stored_hostname[1024];
56static char stored_domainname[1024];
57
58int
59priv_sysctl_write_setup(int asroot, int injail, struct test *test)
60{
61	size_t len;
62	int error;
63
64	len = sizeof(stored_hostname);
65	error = sysctlbyname(KERN_HOSTNAME_STRING, stored_hostname, &len,
66	    NULL, 0);
67	if (error) {
68		warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")",
69		    KERN_HOSTNAME_STRING);
70		return (-1);
71	}
72
73	len = sizeof(stored_hostname);
74	error = sysctlbyname(KERN_DOMAINNAME_STRING, stored_domainname, &len,
75	    NULL, 0);
76	if (error) {
77		warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")",
78		    KERN_DOMAINNAME_STRING);
79		return (-1);
80	}
81
82	return (0);
83}
84
85void
86priv_sysctl_write(int asroot, int injail, struct test *test)
87{
88	int error;
89
90	error = sysctlbyname(KERN_DOMAINNAME_STRING, NULL, NULL,
91	    stored_domainname, strlen(stored_domainname));
92	if (asroot && injail)
93		expect("priv_sysctl_write(asroot, injail)", error, -1,
94		    EPERM);
95	if (asroot && !injail)
96		expect("priv_sysctl_write(asroot, !injail)", error, 0, 0);
97	if (!asroot && injail)
98		expect("priv_sysctl_write(!asroot, injail)", error, -1,
99		    EPERM);
100	if (!asroot && !injail)
101		expect("priv_sysctl_write(!asroot, !injail)", error, -1,
102		    EPERM);
103}
104
105void
106priv_sysctl_writejail(int asroot, int injail, struct test *test)
107{
108	int error;
109
110	error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL,
111	    stored_hostname, strlen(stored_hostname));
112	if (asroot && injail)
113		expect("priv_sysctl_writejail(asroot, injail)", error, 0, 0);
114	if (asroot && !injail)
115		expect("priv_sysctl_writejail(asroot, !injail)", error, 0, 0);
116	if (!asroot && injail)
117		expect("priv_sysctl_writejail(!asroot, injail)", error, -1,
118		    EPERM);
119	if (!asroot && !injail)
120		expect("priv_sysctl_writejail(!asroot, !injail)", error, -1,
121		    EPERM);
122}
123
124void
125priv_sysctl_write_cleanup(int asroot, int injail, struct test *test)
126{
127
128}
129