1 /*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * Copyright (c) 2001, 2002 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 NAI Labs, 9 * the Security Research Division of Network Associates, Inc. under 10 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA 11 * 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 * 3. The names of the authors may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD$ 38 */ 39 /* 40 * Definitions for the TrustedBSD MLS confidentiality policy module. 41 */ 42 #ifndef _SYS_SECURITY_MAC_MLS_H 43 #define _SYS_SECURITY_MAC_MLS_H 44 45 #define MAC_MLS_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM 46 #define MAC_MLS_EXTATTR_NAME "mac_mls" 47 48 #define MAC_MLS_LABEL_NAME "mls" 49 50 #define MAC_MLS_FLAG_SINGLE 0x00000001 /* mm_single initialized */ 51 #define MAC_MLS_FLAG_RANGE 0x00000002 /* mm_range* initialized */ 52 #define MAC_MLS_FLAGS_BOTH (MAC_MLS_FLAG_SINGLE | MAC_MLS_FLAG_RANGE) 53 54 #define MAC_MLS_TYPE_UNDEF 0 /* Undefined */ 55 #define MAC_MLS_TYPE_LEVEL 1 /* Hierarchal level with mm_level. */ 56 #define MAC_MLS_TYPE_LOW 2 /* Dominated by any 57 * MAC_MLS_TYPE_LABEL. */ 58 #define MAC_MLS_TYPE_HIGH 3 /* Dominates any 59 * MAC_MLS_TYPE_LABEL. */ 60 #define MAC_MLS_TYPE_EQUAL 4 /* Equivilent to any 61 * MAC_MLS_TYPE_LABEL. */ 62 63 /* 64 * Structures and constants associated with a Multi-Level Security policy. 65 * mac_mls represents an MLS label, with mm_type determining its properties, 66 * and mm_level represents the hierarchal sensitivity level if valid for the 67 * current mm_type. If compartments are used, the same semantics apply as 68 * long as the suject is in every compartment the object is in. LOW, EQUAL 69 * and HIGH cannot be in compartments. 70 */ 71 72 /* 73 * MLS compartments bit set size (in bits). 74 */ 75 #define MAC_MLS_MAX_COMPARTMMENTS 256 76 77 struct mac_mls_element { 78 u_short mme_type; 79 u_short mme_level; 80 u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3]; 81 }; 82 83 /* 84 * MLS labels consist of two components: a single label, and a label 85 * range. Depending on the context, one or both may be used; the mb_flags 86 * field permits the provider to indicate what fields are intended for 87 * use. 88 */ 89 struct mac_mls { 90 int mm_flags; 91 struct mac_mls_element mm_single; 92 struct mac_mls_element mm_rangelow, mm_rangehigh; 93 }; 94 95 /* 96 * MLS compartments bit test/set macros. 97 * The range is 1 to MAC_MLS_MAX_COMPARTMENTS. 98 */ 99 #define MAC_MLS_BIT_TEST(b, w) \ 100 ((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7))) 101 #define MAC_MLS_BIT_SET(b, w) \ 102 ((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7))) 103 #define MAC_MLS_BIT_SET_EMPTY(set) mls_bit_set_empty(set) 104 105 #endif /* !_SYS_SECURITY_MAC_MLS_H */ 106