FreeBSD/Linux Kernel Cross Reference
sys/security/mac_biba/mac_biba.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 Biba integrity policy module.
     */
    #ifndef _SYS_SECURITY_MAC_BIBA_H
    #define _SYS_SECURITY_MAC_BIBA_H
    
    #define MAC_BIBA_EXTATTR_NAMESPACE      EXTATTR_NAMESPACE_SYSTEM
    #define MAC_BIBA_EXTATTR_NAME           "mac_biba"
    
    #define MAC_BIBA_LABEL_NAME             "biba"
    
    #define MAC_BIBA_FLAG_EFFECTIVE 0x00000001      /* mb_effective initialized */
    #define MAC_BIBA_FLAG_RANGE     0x00000002      /* mb_range* initialized */
    #define MAC_BIBA_FLAGS_BOTH     (MAC_BIBA_FLAG_EFFECTIVE | MAC_BIBA_FLAG_RANGE)
    
    #define MAC_BIBA_TYPE_UNDEF     0       /* Undefined */
    #define MAC_BIBA_TYPE_GRADE     1       /* Hierarchal grade with mb_grade. */
    #define MAC_BIBA_TYPE_LOW       2       /* Dominated by any
                                             * MAC_BIBA_TYPE_LABEL. */
    #define MAC_BIBA_TYPE_HIGH      3       /* Dominates any
                                             * MAC_BIBA_TYPE_LABEL. */
    #define MAC_BIBA_TYPE_EQUAL     4       /* Equivalent to any
                                             * MAC_BIBA_TYPE_LABEL. */
    
    /*
     * Structures and constants associated with a Biba Integrity policy.
     * mac_biba represents a Biba label, with mb_type determining its properties,
     * and mb_grade represents the hierarchal grade if valid for the current
     * mb_type.
     */
    
    #define MAC_BIBA_MAX_COMPARTMENTS       256
    
    struct mac_biba_element {
            u_short mbe_type;
            u_short mbe_grade;
            u_char  mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3];
    };
    
    /*
     * Biba 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_biba {
            int                     mb_flags;
            struct mac_biba_element mb_effective;
            struct mac_biba_element mb_rangelow, mb_rangehigh;
    };
    
    /*
     * Biba compartments bit test/set macros.
     * The range is 1 to MAC_BIBA_MAX_COMPARTMENTS.
     */
    #define MAC_BIBA_BIT_TEST(b, w) \
            ((w)[(((b) - 1) >> 3)] & (1 << (((b) - 1) & 7)))
    #define MAC_BIBA_BIT_SET(b, w) \
            ((w)[(((b) - 1) >> 3)] |= (1 << (((b) - 1) & 7)))
    #define MAC_BIBA_BIT_SET_EMPTY(set)     biba_bit_set_empty(set)
    
    #endif /* !_SYS_SECURITY_MAC_BIBA_H */

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