| 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 */ |