freebsd-dev/sys/security/mac_mls/mac_mls.h
Robert Watson dc858fcabe License and wording updates: NAI has authorized the removal of clause
three from their BSD-style license.  Also, s/NAI Labs/Network Associates
Laboratories/.
2002-11-04 01:53:12 +00:00

103 lines
3.9 KiB
C

/*-
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
* This software was developed for the FreeBSD Project in part by Network
* Associates Laboratories, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
* as part of the DARPA CHATS research program.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* Definitions for the TrustedBSD MLS confidentiality policy module.
*/
#ifndef _SYS_SECURITY_MAC_MLS_H
#define _SYS_SECURITY_MAC_MLS_H
#define MAC_MLS_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
#define MAC_MLS_EXTATTR_NAME "mac_mls"
#define MAC_MLS_LABEL_NAME "mls"
#define MAC_MLS_FLAG_SINGLE 0x00000001 /* mm_single initialized */
#define MAC_MLS_FLAG_RANGE 0x00000002 /* mm_range* initialized */
#define MAC_MLS_FLAGS_BOTH (MAC_MLS_FLAG_SINGLE | MAC_MLS_FLAG_RANGE)
#define MAC_MLS_TYPE_UNDEF 0 /* Undefined */
#define MAC_MLS_TYPE_LEVEL 1 /* Hierarchal level with mm_level. */
#define MAC_MLS_TYPE_LOW 2 /* Dominated by any
* MAC_MLS_TYPE_LABEL. */
#define MAC_MLS_TYPE_HIGH 3 /* Dominates any
* MAC_MLS_TYPE_LABEL. */
#define MAC_MLS_TYPE_EQUAL 4 /* Equivilent to any
* MAC_MLS_TYPE_LABEL. */
/*
* Structures and constants associated with a Multi-Level Security policy.
* mac_mls represents an MLS label, with mm_type determining its properties,
* and mm_level represents the hierarchal sensitivity level if valid for the
* current mm_type. If compartments are used, the same semantics apply as
* long as the suject is in every compartment the object is in. LOW, EQUAL
* and HIGH cannot be in compartments.
*/
/*
* MLS compartments bit set size (in bits).
*/
#define MAC_MLS_MAX_COMPARTMENTS 256
struct mac_mls_element {
u_short mme_type;
u_short mme_level;
u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3];
};
/*
* MLS labels consist of two components: a single label, and a label
* range. Depending on the context, one or both may be used; the mb_flags
* field permits the provider to indicate what fields are intended for
* use.
*/
struct mac_mls {
int mm_flags;
struct mac_mls_element mm_single;
struct mac_mls_element mm_rangelow, mm_rangehigh;
};
/*
* MLS compartments bit test/set macros.
* The range is 1 to MAC_MLS_MAX_COMPARTMENTS.
*/
#define MAC_MLS_BIT_TEST(b, w) \
((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
#define MAC_MLS_BIT_SET(b, w) \
((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
#define MAC_MLS_BIT_SET_EMPTY(set) mls_bit_set_empty(set)
#endif /* !_SYS_SECURITY_MAC_MLS_H */