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policies remains the same: subjects and objects are labeled for integrity or sensitivity, and a dominance operator determines whether or not subject/object accesses are permitted to limit inappropriate information flow. Compartments are a non-hierarchal component to the label, so add a bitfield to the label element for each, and a set check as part of the dominance operator. This permits the implementation of "need to know" elements of MLS. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
72 lines
3.0 KiB
C
72 lines
3.0 KiB
C
/*-
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* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
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* Copyright (c) 2001, 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert Watson for the TrustedBSD Project.
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*
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* This software was developed for the FreeBSD Project in part by NAI Labs,
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* the Security Research Division of Network Associates, Inc. under
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* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
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* CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Definitions for the TrustedBSD MLS confidentiality policy module.
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*/
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#ifndef _SYS_SECURITY_MAC_MLS_H
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#define _SYS_SECURITY_MAC_MLS_H
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#define MAC_MLS_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
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#define MAC_MLS_EXTATTR_NAME "mac_biba"
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#define MAC_MLS_FLAG_SINGLE 0x00000001 /* mm_single initialized */
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#define MAC_MLS_FLAG_RANGE 0x00000002 /* mm_range* initialized */
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#define MAC_MLS_FLAGS_BOTH (MAC_MLS_FLAG_SINGLE | MAC_MLS_FLAG_RANGE)
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#define MAC_MLS_TYPE_UNDEF 0 /* Undefined */
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#define MAC_MLS_TYPE_LEVEL 1 /* Hierarchal level with mm_level. */
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#define MAC_MLS_TYPE_LOW 2 /* Dominated by any
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* MAC_MLS_TYPE_LABEL. */
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#define MAC_MLS_TYPE_HIGH 3 /* Dominates any
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* MAC_MLS_TYPE_LABEL. */
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#define MAC_MLS_TYPE_EQUAL 4 /* Equivilent to any
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* MAC_MLS_TYPE_LABEL. */
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/*
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* MLS compartments bit test/set macros.
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* The range is 1 to MAC_MLS_MAX_COMPARTMENTS.
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*/
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#define MAC_MLS_BIT_TEST(b, w) \
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((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
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#define MAC_MLS_BIT_SET(b, w) \
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((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
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#define MAC_MLS_BIT_SET_EMPTY(set) mls_bit_set_empty(set)
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#endif /* !_SYS_SECURITY_MAC_MLS_H */
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