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mac_mls.c
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mac_mls.h
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Editing: mac_mls.h
/*- * Copyright (c) 1999-2002 Robert N. M. Watson * Copyright (c) 2001-2004 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_EFFECTIVE 0x00000001 /* mm_effective initialized */ #define MAC_MLS_FLAG_RANGE 0x00000002 /* mm_range* initialized */ #define MAC_MLS_FLAGS_BOTH (MAC_MLS_FLAG_EFFECTIVE | 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 /* Equivalent 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: an effective 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_effective; 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 */
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