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
31 /*
32 * Two privileges exist for writing sysctls -- one for sysctls writable only
33 * outside of jail (PRIV_SYSCTL_WRITE) and one for those also writable inside
34 * jail (PRIV_SYSCTL_WRITEJAIL).
35 *
36 * Test the prior by attempting to write to kern.domainname, and the latter
37 * by attempting to write to kern.hostname.
38 */
39
40 #include <sys/types.h>
41 #include <sys/sysctl.h>
42
43 #include <err.h>
44 #include <errno.h>
45 #include <string.h>
46 #include <unistd.h>
47
48 #include "main.h"
49
50 #define KERN_HOSTNAME_STRING "kern.hostname"
51 #define KERN_DOMAINNAME_STRING "kern.domainname"
52
53 static char stored_hostname[1024];
54 static char stored_domainname[1024];
55
56 int
priv_sysctl_write_setup(int asroot,int injail,struct test * test)57 priv_sysctl_write_setup(int asroot, int injail, struct test *test)
58 {
59 size_t len;
60 int error;
61
62 len = sizeof(stored_hostname);
63 error = sysctlbyname(KERN_HOSTNAME_STRING, stored_hostname, &len,
64 NULL, 0);
65 if (error) {
66 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")",
67 KERN_HOSTNAME_STRING);
68 return (-1);
69 }
70
71 len = sizeof(stored_hostname);
72 error = sysctlbyname(KERN_DOMAINNAME_STRING, stored_domainname, &len,
73 NULL, 0);
74 if (error) {
75 warn("priv_sysctl_write_setup: sysctlbyname(\"%s\")",
76 KERN_DOMAINNAME_STRING);
77 return (-1);
78 }
79
80 return (0);
81 }
82
83 void
priv_sysctl_write(int asroot,int injail,struct test * test)84 priv_sysctl_write(int asroot, int injail, struct test *test)
85 {
86 int error;
87
88 error = sysctlbyname(KERN_DOMAINNAME_STRING, NULL, NULL,
89 stored_domainname, strlen(stored_domainname));
90 if (asroot && injail)
91 expect("priv_sysctl_write(asroot, injail)", error, -1,
92 EPERM);
93 if (asroot && !injail)
94 expect("priv_sysctl_write(asroot, !injail)", error, 0, 0);
95 if (!asroot && injail)
96 expect("priv_sysctl_write(!asroot, injail)", error, -1,
97 EPERM);
98 if (!asroot && !injail)
99 expect("priv_sysctl_write(!asroot, !injail)", error, -1,
100 EPERM);
101 }
102
103 void
priv_sysctl_writejail(int asroot,int injail,struct test * test)104 priv_sysctl_writejail(int asroot, int injail, struct test *test)
105 {
106 int error;
107
108 error = sysctlbyname(KERN_HOSTNAME_STRING, NULL, NULL,
109 stored_hostname, strlen(stored_hostname));
110 if (asroot && injail)
111 expect("priv_sysctl_writejail(asroot, injail)", error, 0, 0);
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, -1,
116 EPERM);
117 if (!asroot && !injail)
118 expect("priv_sysctl_writejail(!asroot, !injail)", error, -1,
119 EPERM);
120 }
121
122 void
priv_sysctl_write_cleanup(int asroot,int injail,struct test * test)123 priv_sysctl_write_cleanup(int asroot, int injail, struct test *test)
124 {
125
126 }
127