xref: /freebsd/sys/security/mac_biba/mac_biba.h (revision f30a9615fddeba5106492b4623e0bc37c999f45d)
1d8a7b7a3SRobert Watson /*-
2d8a7b7a3SRobert Watson  * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
3d8a7b7a3SRobert Watson  * Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
4d8a7b7a3SRobert Watson  * All rights reserved.
5d8a7b7a3SRobert Watson  *
6d8a7b7a3SRobert Watson  * This software was developed by Robert Watson for the TrustedBSD Project.
7d8a7b7a3SRobert Watson  *
8d8a7b7a3SRobert Watson  * This software was developed for the FreeBSD Project in part by NAI Labs,
9d8a7b7a3SRobert Watson  * the Security Research Division of Network Associates, Inc. under
10d8a7b7a3SRobert Watson  * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
11d8a7b7a3SRobert Watson  * CHATS research program.
12d8a7b7a3SRobert Watson  *
13d8a7b7a3SRobert Watson  * Redistribution and use in source and binary forms, with or without
14d8a7b7a3SRobert Watson  * modification, are permitted provided that the following conditions
15d8a7b7a3SRobert Watson  * are met:
16d8a7b7a3SRobert Watson  * 1. Redistributions of source code must retain the above copyright
17d8a7b7a3SRobert Watson  *    notice, this list of conditions and the following disclaimer.
18d8a7b7a3SRobert Watson  * 2. Redistributions in binary form must reproduce the above copyright
19d8a7b7a3SRobert Watson  *    notice, this list of conditions and the following disclaimer in the
20d8a7b7a3SRobert Watson  *    documentation and/or other materials provided with the distribution.
21d8a7b7a3SRobert Watson  * 3. The names of the authors may not be used to endorse or promote
22d8a7b7a3SRobert Watson  *    products derived from this software without specific prior written
23d8a7b7a3SRobert Watson  *    permission.
24d8a7b7a3SRobert Watson  *
25d8a7b7a3SRobert Watson  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26d8a7b7a3SRobert Watson  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27d8a7b7a3SRobert Watson  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28d8a7b7a3SRobert Watson  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29d8a7b7a3SRobert Watson  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30d8a7b7a3SRobert Watson  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31d8a7b7a3SRobert Watson  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32d8a7b7a3SRobert Watson  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33d8a7b7a3SRobert Watson  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34d8a7b7a3SRobert Watson  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35d8a7b7a3SRobert Watson  * SUCH DAMAGE.
36d8a7b7a3SRobert Watson  *
37d8a7b7a3SRobert Watson  * $FreeBSD$
38d8a7b7a3SRobert Watson  */
39d8a7b7a3SRobert Watson /*
40d8a7b7a3SRobert Watson  * Definitions for the TrustedBSD Biba integrity policy module.
41d8a7b7a3SRobert Watson  */
42d8a7b7a3SRobert Watson #ifndef _SYS_SECURITY_MAC_BIBA_H
43d8a7b7a3SRobert Watson #define	_SYS_SECURITY_MAC_BIBA_H
44d8a7b7a3SRobert Watson 
45d8a7b7a3SRobert Watson #define	MAC_BIBA_EXTATTR_NAMESPACE	EXTATTR_NAMESPACE_SYSTEM
46d8a7b7a3SRobert Watson #define	MAC_BIBA_EXTATTR_NAME		"mac_biba"
47d8a7b7a3SRobert Watson 
4824e8d0d0SRobert Watson #define	MAC_BIBA_LABEL_NAME		"biba"
4924e8d0d0SRobert Watson 
50d8a7b7a3SRobert Watson #define	MAC_BIBA_FLAG_SINGLE	0x00000001	/* mb_single initialized */
51d8a7b7a3SRobert Watson #define	MAC_BIBA_FLAG_RANGE	0x00000002	/* mb_range* initialized */
52d8a7b7a3SRobert Watson #define	MAC_BIBA_FLAGS_BOTH	(MAC_BIBA_FLAG_SINGLE | MAC_BIBA_FLAG_RANGE)
53d8a7b7a3SRobert Watson 
54d8a7b7a3SRobert Watson #define	MAC_BIBA_TYPE_UNDEF	0	/* Undefined */
55d8a7b7a3SRobert Watson #define	MAC_BIBA_TYPE_GRADE	1	/* Hierarchal grade with mb_grade. */
56d8a7b7a3SRobert Watson #define	MAC_BIBA_TYPE_LOW	2	/* Dominated by any
57d8a7b7a3SRobert Watson 					 * MAC_BIBA_TYPE_LABEL. */
58d8a7b7a3SRobert Watson #define	MAC_BIBA_TYPE_HIGH	3	/* Dominates any
59d8a7b7a3SRobert Watson 					 * MAC_BIBA_TYPE_LABEL. */
60d8a7b7a3SRobert Watson #define	MAC_BIBA_TYPE_EQUAL	4	/* Equivilent to any
61d8a7b7a3SRobert Watson 					 * MAC_BIBA_TYPE_LABEL. */
62d8a7b7a3SRobert Watson 
632a1c79afSRobert Watson /*
64f30a9615SRobert Watson  * Structures and constants associated with a Biba Integrity policy.
65f30a9615SRobert Watson  * mac_biba represents a Biba label, with mb_type determining its properties,
66f30a9615SRobert Watson  * and mb_grade represents the hierarchal grade if valid for the current
67f30a9615SRobert Watson  * mb_type.
68f30a9615SRobert Watson  */
69f30a9615SRobert Watson 
70f30a9615SRobert Watson #define	MAC_BIBA_MAX_COMPARTMENTS	256
71f30a9615SRobert Watson 
72f30a9615SRobert Watson struct mac_biba_element {
73f30a9615SRobert Watson 	u_short	mbe_type;
74f30a9615SRobert Watson 	u_short	mbe_grade;
75f30a9615SRobert Watson 	u_char	mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3];
76f30a9615SRobert Watson };
77f30a9615SRobert Watson 
78f30a9615SRobert Watson /*
79f30a9615SRobert Watson  * Biba labels consist of two components: a single label, and a label
80f30a9615SRobert Watson  * range.  Depending on the context, one or both may be used; the mb_flags
81f30a9615SRobert Watson  * field permits the provider to indicate what fields are intended for
82f30a9615SRobert Watson  * use.
83f30a9615SRobert Watson  */
84f30a9615SRobert Watson struct mac_biba {
85f30a9615SRobert Watson 	int			mb_flags;
86f30a9615SRobert Watson 	struct mac_biba_element	mb_single;
87f30a9615SRobert Watson 	struct mac_biba_element	mb_rangelow, mb_rangehigh;
88f30a9615SRobert Watson };
89f30a9615SRobert Watson 
90f30a9615SRobert Watson /*
912a1c79afSRobert Watson  * Biba compartments bit test/set macros.
922a1c79afSRobert Watson  * The range is 1 to MAC_BIBA_MAX_COMPARTMENTS.
932a1c79afSRobert Watson  */
942a1c79afSRobert Watson #define	MAC_BIBA_BIT_TEST(b, w) \
952a1c79afSRobert Watson 	((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
962a1c79afSRobert Watson #define	MAC_BIBA_BIT_SET(b, w) \
972a1c79afSRobert Watson 	((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
982a1c79afSRobert Watson #define	MAC_BIBA_BIT_SET_EMPTY(set)	biba_bit_set_empty(set)
992a1c79afSRobert Watson 
100d8a7b7a3SRobert Watson #endif /* !_SYS_SECURITY_MAC_BIBA_H */
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