security/mac_system.c

   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 /*-
  30  * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
  31  * Copyright (c) 2001 Ilmar S. Habibulin
  32  * Copyright (c) 2001, 2002, 2003, 2004 Networks Associates Technology, Inc.
  33  *
  34  * This software was developed by Robert Watson and Ilmar Habibulin for the
  35  * TrustedBSD Project.
  36  *
  37  * This software was developed for the FreeBSD Project in part by Network
  38  * Associates Laboratories, the Security Research Division of Network
  39  * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
  40  * as part of the DARPA CHATS research program.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/vnode.h>
  67 #include <sys/vnode_internal.h>
  68
  69 #include <security/mac_internal.h>
  70
  71
  72 int
  73 mac_system_check_acct(kauth_cred_t cred, struct vnode *vp)
  74 {
  75         int error;
  76
  77 #if SECURITY_MAC_CHECK_ENFORCE
  78         /* 21167099 - only check if we allow write */
  79         if (!mac_system_enforce) {
  80                 return 0;
  81         }
  82 #endif
  83
  84         MAC_CHECK(system_check_acct, cred, vp,
  85             vp != NULL ? vp->v_label : NULL);
  86
  87         return error;
  88 }
  89
  90 int
  91 mac_system_check_chud(kauth_cred_t cred)
  92 {
  93         int error;
  94
  95 #if SECURITY_MAC_CHECK_ENFORCE
  96         /* 21167099 - only check if we allow write */
  97         if (!mac_system_enforce) {
  98                 return 0;
  99         }
 100 #endif
 101
 102         MAC_CHECK(system_check_chud, cred);
 103
 104         return error;
 105 }
 106
 107 int
 108 mac_system_check_host_priv(kauth_cred_t cred)
 109 {
 110         int error;
 111
 112 #if SECURITY_MAC_CHECK_ENFORCE
 113         /* 21167099 - only check if we allow write */
 114         if (!mac_system_enforce) {
 115                 return 0;
 116         }
 117 #endif
 118
 119         MAC_CHECK(system_check_host_priv, cred);
 120
 121         return error;
 122 }
 123
 124 int
 125 mac_system_check_info(kauth_cred_t cred, const char *info_type)
 126 {
 127         int error;
 128
 129 #if SECURITY_MAC_CHECK_ENFORCE
 130         /* 21167099 - only check if we allow write */
 131         if (!mac_system_enforce) {
 132                 return 0;
 133         }
 134 #endif
 135
 136         MAC_CHECK(system_check_info, cred, info_type);
 137
 138         return error;
 139 }
 140
 141 int
 142 mac_system_check_nfsd(kauth_cred_t cred)
 143 {
 144         int error;
 145
 146 #if SECURITY_MAC_CHECK_ENFORCE
 147         /* 21167099 - only check if we allow write */
 148         if (!mac_system_enforce) {
 149                 return 0;
 150         }
 151 #endif
 152
 153         MAC_CHECK(system_check_nfsd, cred);
 154
 155         return error;
 156 }
 157
 158 int
 159 mac_system_check_reboot(kauth_cred_t cred, int howto)
 160 {
 161         int error;
 162
 163 #if SECURITY_MAC_CHECK_ENFORCE
 164         /* 21167099 - only check if we allow write */
 165         if (!mac_system_enforce) {
 166                 return 0;
 167         }
 168 #endif
 169
 170         MAC_CHECK(system_check_reboot, cred, howto);
 171
 172         return error;
 173 }
 174
 175
 176 int
 177 mac_system_check_settime(kauth_cred_t cred)
 178 {
 179         int error;
 180
 181 #if SECURITY_MAC_CHECK_ENFORCE
 182         /* 21167099 - only check if we allow write */
 183         if (!mac_system_enforce) {
 184                 return 0;
 185         }
 186 #endif
 187
 188         MAC_CHECK(system_check_settime, cred);
 189
 190         return error;
 191 }
 192
 193 int
 194 mac_system_check_swapon(kauth_cred_t cred, struct vnode *vp)
 195 {
 196         int error;
 197
 198 #if SECURITY_MAC_CHECK_ENFORCE
 199         /* 21167099 - only check if we allow write */
 200         if (!mac_system_enforce) {
 201                 return 0;
 202         }
 203 #endif
 204
 205         MAC_CHECK(system_check_swapon, cred, vp, vp->v_label);
 206         return error;
 207 }
 208
 209 int
 210 mac_system_check_swapoff(kauth_cred_t cred, struct vnode *vp)
 211 {
 212         int error;
 213
 214 #if SECURITY_MAC_CHECK_ENFORCE
 215         /* 21167099 - only check if we allow write */
 216         if (!mac_system_enforce) {
 217                 return 0;
 218         }
 219 #endif
 220
 221         MAC_CHECK(system_check_swapoff, cred, vp, vp->v_label);
 222         return error;
 223 }
 224
 225 int
 226 mac_system_check_sysctlbyname(kauth_cred_t cred, const char *namestring, int *name,
 227     u_int namelen, user_addr_t oldctl, size_t oldlen,
 228     user_addr_t newctl, size_t newlen)
 229 {
 230         int error;
 231
 232 #if SECURITY_MAC_CHECK_ENFORCE
 233         /* 21167099 - only check if we allow write */
 234         if (!mac_system_enforce) {
 235                 return 0;
 236         }
 237 #endif
 238
 239         MAC_CHECK(system_check_sysctlbyname, cred, namestring,
 240             name, namelen, oldctl, oldlen, newctl, newlen);
 241
 242         return error;
 243 }
 244
 245 int
 246 mac_system_check_kas_info(kauth_cred_t cred, int selector)
 247 {
 248         int error;
 249
 250 #if SECURITY_MAC_CHECK_ENFORCE
 251         /* 21167099 - only check if we allow write */
 252         if (!mac_system_enforce) {
 253                 return 0;
 254         }
 255 #endif
 256
 257         MAC_CHECK(system_check_kas_info, cred, selector);
 258
 259         return error;
 260 }