1 /*- 2 * Copyright (c) 1999-2002 Robert N. M. Watson 3 * Copyright (c) 2001-2004 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed by Robert Watson for the TrustedBSD Project. 7 * 8 * This software was developed for the FreeBSD Project in part by Network 9 * Associates Laboratories, the Security Research Division of Network 10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 11 * as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 /* 35 * Definitions for the TrustedBSD MLS confidentiality policy module. 36 */ 37 #ifndef _SYS_SECURITY_MAC_MLS_H 38 #define _SYS_SECURITY_MAC_MLS_H 39 40 #define MAC_MLS_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM 41 #define MAC_MLS_EXTATTR_NAME "mac_mls" 42 43 #define MAC_MLS_LABEL_NAME "mls" 44 45 #define MAC_MLS_FLAG_EFFECTIVE 0x00000001 /* mm_effective initialized */ 46 #define MAC_MLS_FLAG_RANGE 0x00000002 /* mm_range* initialized */ 47 #define MAC_MLS_FLAGS_BOTH (MAC_MLS_FLAG_EFFECTIVE | MAC_MLS_FLAG_RANGE) 48 49 #define MAC_MLS_TYPE_UNDEF 0 /* Undefined */ 50 #define MAC_MLS_TYPE_LEVEL 1 /* Hierarchal level with mm_level. */ 51 #define MAC_MLS_TYPE_LOW 2 /* Dominated by any 52 * MAC_MLS_TYPE_LABEL. */ 53 #define MAC_MLS_TYPE_HIGH 3 /* Dominates any 54 * MAC_MLS_TYPE_LABEL. */ 55 #define MAC_MLS_TYPE_EQUAL 4 /* Equivalent to any 56 * MAC_MLS_TYPE_LABEL. */ 57 58 /* 59 * Structures and constants associated with a Multi-Level Security policy. 60 * mac_mls represents an MLS label, with mm_type determining its properties, 61 * and mm_level represents the hierarchal sensitivity level if valid for the 62 * current mm_type. If compartments are used, the same semantics apply as 63 * long as the suject is in every compartment the object is in. LOW, EQUAL 64 * and HIGH cannot be in compartments. 65 */ 66 67 /* 68 * MLS compartments bit set size (in bits). 69 */ 70 #define MAC_MLS_MAX_COMPARTMENTS 256 71 72 struct mac_mls_element { 73 u_short mme_type; 74 u_short mme_level; 75 u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3]; 76 }; 77 78 /* 79 * MLS labels consist of two components: an effective label, and a label 80 * range. Depending on the context, one or both may be used; the mb_flags 81 * field permits the provider to indicate what fields are intended for 82 * use. 83 */ 84 struct mac_mls { 85 int mm_flags; 86 struct mac_mls_element mm_effective; 87 struct mac_mls_element mm_rangelow, mm_rangehigh; 88 }; 89 90 /* 91 * MLS compartments bit test/set macros. 92 * The range is 1 to MAC_MLS_MAX_COMPARTMENTS. 93 */ 94 #define MAC_MLS_BIT_TEST(b, w) \ 95 ((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7))) 96 #define MAC_MLS_BIT_SET(b, w) \ 97 ((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7))) 98 #define MAC_MLS_BIT_SET_EMPTY(set) mls_bit_set_empty(set) 99 100 #endif /* !_SYS_SECURITY_MAC_MLS_H */ 101