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
98 lines
3.7 KiB
C
98 lines
3.7 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 Biba integrity policy module.
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*/
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#ifndef _SYS_SECURITY_MAC_BIBA_H
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#define _SYS_SECURITY_MAC_BIBA_H
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#define MAC_BIBA_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM
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#define MAC_BIBA_EXTATTR_NAME "mac_biba"
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#define MAC_BIBA_LABEL_NAME "biba"
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#define MAC_BIBA_FLAG_EFFECTIVE 0x00000001 /* mb_effective initialized */
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#define MAC_BIBA_FLAG_RANGE 0x00000002 /* mb_range* initialized */
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#define MAC_BIBA_FLAGS_BOTH (MAC_BIBA_FLAG_EFFECTIVE | MAC_BIBA_FLAG_RANGE)
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#define MAC_BIBA_TYPE_UNDEF 0 /* Undefined */
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#define MAC_BIBA_TYPE_GRADE 1 /* Hierarchal grade with mb_grade. */
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#define MAC_BIBA_TYPE_LOW 2 /* Dominated by any
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* MAC_BIBA_TYPE_LABEL. */
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#define MAC_BIBA_TYPE_HIGH 3 /* Dominates any
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* MAC_BIBA_TYPE_LABEL. */
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#define MAC_BIBA_TYPE_EQUAL 4 /* Equivilent to any
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* MAC_BIBA_TYPE_LABEL. */
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/*
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* Structures and constants associated with a Biba Integrity policy.
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* mac_biba represents a Biba label, with mb_type determining its properties,
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* and mb_grade represents the hierarchal grade if valid for the current
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* mb_type.
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*/
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#define MAC_BIBA_MAX_COMPARTMENTS 256
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struct mac_biba_element {
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u_short mbe_type;
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u_short mbe_grade;
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u_char mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3];
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};
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/*
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* Biba 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_biba {
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int mb_flags;
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struct mac_biba_element mb_effective;
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struct mac_biba_element mb_rangelow, mb_rangehigh;
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};
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/*
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* Biba compartments bit test/set macros.
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* The range is 1 to MAC_BIBA_MAX_COMPARTMENTS.
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*/
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#define MAC_BIBA_BIT_TEST(b, w) \
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((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
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#define MAC_BIBA_BIT_SET(b, w) \
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((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
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#define MAC_BIBA_BIT_SET_EMPTY(set) biba_bit_set_empty(set)
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#endif /* !_SYS_SECURITY_MAC_BIBA_H */
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