mac_priv.c revision 165469 
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/sys/security/mac/mac_priv.c 165469 2006-12-22 23:34:47Z rwatson $
30 */
31
32/*
33 * MAC checks for system privileges.
34 */
35
36#include "opt_mac.h"
37
38#include <sys/param.h>
39#include <sys/priv.h>
40#include <sys/module.h>
41
42#include <security/mac/mac_framework.h>
43#include <security/mac/mac_internal.h>
44#include <security/mac/mac_policy.h>
45
46/*
47 * The MAC Framework interacts with kernel privilege checks in two ways: it
48 * may restrict the granting of privilege to a subject, and it may grant
49 * additional privileges to the subject.  Policies may implement none, one,
50 * or both of these entry points.  Restriction of privilege by any policy
51 * always overrides granting of privilege by any policy or other privilege
52 * mechanism.  See kern_priv.c:priv_check_cred() for details of the
53 * composition.
54 */
55
56/*
57 * Restrict access to a privilege for a credential.  Return failure if any
58 * policy denies access.
59 */
60int
61mac_priv_check(struct ucred *cred, int priv)
62{
63	int error;
64
65	MAC_CHECK(priv_check, cred, priv);
66
67	return (error);
68}
69
70/*
71 * Grant access to a privilege for a credential.  Return success if any
72 * policy grants access.
73 */
74int
75mac_priv_grant(struct ucred *cred, int priv)
76{
77	int error;
78
79	MAC_GRANT(priv_grant, cred, priv);
80
81	return (error);
82}
83