The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/security/mac_biba/mac_biba.h

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    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  * $FreeBSD: releng/11.2/sys/security/mac_biba/mac_biba.h 299187 2016-05-06 16:59:04Z pfg $
   35  */
   36 /*
   37  * Definitions for the TrustedBSD Biba integrity policy module.
   38  */
   39 #ifndef _SYS_SECURITY_MAC_BIBA_H
   40 #define _SYS_SECURITY_MAC_BIBA_H
   41 
   42 #define MAC_BIBA_EXTATTR_NAMESPACE      EXTATTR_NAMESPACE_SYSTEM
   43 #define MAC_BIBA_EXTATTR_NAME           "mac_biba"
   44 
   45 #define MAC_BIBA_LABEL_NAME             "biba"
   46 
   47 #define MAC_BIBA_FLAG_EFFECTIVE 0x00000001      /* mb_effective initialized */
   48 #define MAC_BIBA_FLAG_RANGE     0x00000002      /* mb_range* initialized */
   49 #define MAC_BIBA_FLAGS_BOTH     (MAC_BIBA_FLAG_EFFECTIVE | MAC_BIBA_FLAG_RANGE)
   50 
   51 #define MAC_BIBA_TYPE_UNDEF     0       /* Undefined */
   52 #define MAC_BIBA_TYPE_GRADE     1       /* Hierarchal grade with mb_grade. */
   53 #define MAC_BIBA_TYPE_LOW       2       /* Dominated by any
   54                                          * MAC_BIBA_TYPE_LABEL. */
   55 #define MAC_BIBA_TYPE_HIGH      3       /* Dominates any
   56                                          * MAC_BIBA_TYPE_LABEL. */
   57 #define MAC_BIBA_TYPE_EQUAL     4       /* Equivalent to any
   58                                          * MAC_BIBA_TYPE_LABEL. */
   59 
   60 /*
   61  * Structures and constants associated with a Biba Integrity policy.
   62  * mac_biba represents a Biba label, with mb_type determining its properties,
   63  * and mb_grade represents the hierarchal grade if valid for the current
   64  * mb_type.
   65  */
   66 
   67 #define MAC_BIBA_MAX_COMPARTMENTS       256
   68 
   69 struct mac_biba_element {
   70         u_short mbe_type;
   71         u_short mbe_grade;
   72         u_char  mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3];
   73 };
   74 
   75 /*
   76  * Biba labels consist of two components: an effective label, and a label
   77  * range.  Depending on the context, one or both may be used; the mb_flags
   78  * field permits the provider to indicate what fields are intended for
   79  * use.
   80  */
   81 struct mac_biba {
   82         int                     mb_flags;
   83         struct mac_biba_element mb_effective;
   84         struct mac_biba_element mb_rangelow, mb_rangehigh;
   85 };
   86 
   87 /*
   88  * Biba compartments bit test/set macros.
   89  * The range is 1 to MAC_BIBA_MAX_COMPARTMENTS.
   90  */
   91 #define MAC_BIBA_BIT_TEST(b, w) \
   92         ((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
   93 #define MAC_BIBA_BIT_SET(b, w) \
   94         ((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
   95 #define MAC_BIBA_BIT_SET_EMPTY(set)     biba_bit_set_empty(set)
   96 
   97 #endif /* !_SYS_SECURITY_MAC_BIBA_H */

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