security/mac_data.h

   1 /*
   2  * Copyright (c) 2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*-
  29  * Copyright (c) 2006 SPARTA, Inc.
  30  * All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  */
  53
  54 #ifndef _SECURITY_MAC_DATA_H_
  55 #define _SECURITY_MAC_DATA_H_
  56
  57 /**
  58   @brief Mac policy module data
  59
  60   This structure specifies module data that is passed in to the
  61   TrustedBSD MAC policy module by the kernel module loader.  The
  62   data is made of up key/value pairs where the key is always a
  63   string and the value is a string, binary data or array.  An array
  64   may be a list of values (actually a similar set of key/value pairs,
  65   but in this case the keys are always null), and may also consist of
  66   a set of dictionaries, which in turn are made up of a list of key/value
  67   pairs.
  68
  69   Module data may be specified in the MAC policy module's
  70   Info.plist file as part of the OSModuleData dictionary.
  71
  72   E.g.
  73
  74   <key>OSModuleData</key>
  75   <dict>
  76         <key>foo</key>
  77         <string>bar</string>
  78         <key>Beers</key>
  79         <array>
  80         <dict>
  81                 <key>type</key>
  82                 <string>lager</string>
  83                 <key>Name</key>
  84                 <string>Anchor Steam</string>
  85         </dict>
  86         <dict>
  87                 <key>type</key>
  88                 <string>ale</string>
  89                 <key>Name</key>
  90                 <string>Sierra Nevada Pale Ale</string>
  91         </dict>
  92         </array>
  93   </dict>
  94
  95 */
  96 struct mac_module_data_element {
  97         unsigned int key_size;
  98         unsigned int value_size;
  99         unsigned int value_type;
 100         char *key;
 101         char *value;
 102 };
 103 struct mac_module_data_list {
 104         unsigned int count;
 105         unsigned int type;
 106         struct mac_module_data_element list[1];
 107 };
 108 struct mac_module_data {
 109         void *base_addr;                /* Orig base address, for ptr fixup.  */
 110         unsigned int size;
 111         unsigned int count;
 112         struct mac_module_data_element data[1]; /* actually bigger */
 113 };
 114
 115 #define MAC_DATA_TYPE_PRIMITIVE 0       /* Primitive type (int, string, etc.) */
 116 #define MAC_DATA_TYPE_ARRAY     1       /* Array type.                        */
 117 #define MAC_DATA_TYPE_DICT      2       /* Dictionary type.                   */
 118
 119 #ifdef _SECURITY_MAC_POLICY_H_
 120 /* XXX mac_policy_handle_t is defined in mac_policy.h, move prototype there? */
 121 int mac_find_policy_data(const mac_policy_handle_t, const char *key,
 122     void **valp, size_t *sizep);
 123 int mac_find_module_data(struct mac_module_data *mmd, const char *key,
 124     void **valp, size_t *sizep);
 125
 126 /*
 127  * This is a routine to fix up pointers in a mac_module_data_element when the
 128  * mac_module_data has been copied to a new area.  It depends on the pointers
 129  * all being offset from base_addr.
 130  */
 131 static __inline void
 132 mmd_fixup_ele(struct mac_module_data *oldbase,
 133     struct mac_module_data *newbase, struct mac_module_data_element *ele)
 134 {
 135         if (ele->key != NULL) {         /* Array elements have no keys.       */
 136                 ele->key -= (unsigned int)oldbase;
 137                 ele->key += (unsigned int)newbase;
 138         }
 139         ele->value -= (unsigned int)oldbase;
 140         ele->value += (unsigned int)newbase;
 141 }
 142
 143 #endif
 144
 145 #endif /* !_SECURITY_MAC_DATA_H_ */