b41025be85
accurately represents the intention of the 'single' label element in Biba and MLS labels. It also approximates the use of 'effective' in traditional UNIX credentials, and avoids confusion with 'singlelabel' in the context of file systems. Inspired by: trhodes
103 lines
3.9 KiB
C
103 lines
3.9 KiB
C
/*-
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* Copyright (c) 1999-2002 Robert N. M. Watson
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* Copyright (c) 2001-2004 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 Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA 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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*
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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_mls"
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#define MAC_MLS_LABEL_NAME "mls"
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#define MAC_MLS_FLAG_EFFECTIVE 0x00000001 /* mm_effective 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_EFFECTIVE | 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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* Structures and constants associated with a Multi-Level Security policy.
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* mac_mls represents an MLS label, with mm_type determining its properties,
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* and mm_level represents the hierarchal sensitivity level if valid for the
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* current mm_type. If compartments are used, the same semantics apply as
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* long as the suject is in every compartment the object is in. LOW, EQUAL
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* and HIGH cannot be in compartments.
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*/
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/*
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* MLS compartments bit set size (in bits).
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*/
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#define MAC_MLS_MAX_COMPARTMENTS 256
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struct mac_mls_element {
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u_short mme_type;
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u_short mme_level;
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u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3];
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};
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/*
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* MLS labels consist of two components: an effective label, and a label
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* range. Depending on the context, one or both may be used; the mb_flags
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* field permits the provider to indicate what fields are intended for
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* use.
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*/
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struct mac_mls {
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int mm_flags;
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struct mac_mls_element mm_effective;
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struct mac_mls_element mm_rangelow, mm_rangehigh;
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};
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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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