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 #endif
  82
  83         MAC_CHECK(system_check_acct, cred, vp,
  84             vp != NULL ? vp->v_label : NULL);
  85
  86         return (error);
  87 }
  88
  89 int
  90 mac_system_check_chud(kauth_cred_t cred)
  91 {
  92         int error;
  93
  94 #if SECURITY_MAC_CHECK_ENFORCE
  95         /* 21167099 - only check if we allow write */
  96         if (!mac_system_enforce)
  97                 return (0);
  98 #endif
  99
 100         MAC_CHECK(system_check_chud, cred);
 101
 102         return (error);
 103 }
 104
 105 int
 106 mac_system_check_host_priv(kauth_cred_t cred)
 107 {
 108         int error;
 109
 110 #if SECURITY_MAC_CHECK_ENFORCE
 111         /* 21167099 - only check if we allow write */
 112         if (!mac_system_enforce)
 113                 return (0);
 114 #endif
 115
 116         MAC_CHECK(system_check_host_priv, cred);
 117
 118         return (error);
 119 }
 120
 121 int
 122 mac_system_check_info(kauth_cred_t cred, const char *info_type)
 123 {
 124         int error;
 125
 126 #if SECURITY_MAC_CHECK_ENFORCE
 127         /* 21167099 - only check if we allow write */
 128         if (!mac_system_enforce)
 129                 return (0);
 130 #endif
 131
 132         MAC_CHECK(system_check_info, cred, info_type);
 133
 134         return (error);
 135 }
 136
 137 int
 138 mac_system_check_nfsd(kauth_cred_t cred)
 139 {
 140         int error;
 141
 142 #if SECURITY_MAC_CHECK_ENFORCE
 143         /* 21167099 - only check if we allow write */
 144         if (!mac_system_enforce)
 145                 return (0);
 146 #endif
 147
 148         MAC_CHECK(system_check_nfsd, cred);
 149
 150         return (error);
 151 }
 152
 153 int
 154 mac_system_check_reboot(kauth_cred_t cred, int howto)
 155 {
 156         int error;
 157
 158 #if SECURITY_MAC_CHECK_ENFORCE
 159         /* 21167099 - only check if we allow write */
 160         if (!mac_system_enforce)
 161                 return (0);
 162 #endif
 163
 164         MAC_CHECK(system_check_reboot, cred, howto);
 165
 166         return (error);
 167 }
 168
 169
 170 int
 171 mac_system_check_settime(kauth_cred_t cred)
 172 {
 173         int error;
 174
 175 #if SECURITY_MAC_CHECK_ENFORCE
 176         /* 21167099 - only check if we allow write */
 177         if (!mac_system_enforce)
 178                 return (0);
 179 #endif
 180
 181         MAC_CHECK(system_check_settime, cred);
 182
 183         return (error);
 184 }
 185
 186 int
 187 mac_system_check_swapon(kauth_cred_t cred, struct vnode *vp)
 188 {
 189         int error;
 190
 191 #if SECURITY_MAC_CHECK_ENFORCE
 192         /* 21167099 - only check if we allow write */
 193         if (!mac_system_enforce)
 194                 return (0);
 195 #endif
 196
 197         MAC_CHECK(system_check_swapon, cred, vp, vp->v_label);
 198         return (error);
 199 }
 200
 201 int
 202 mac_system_check_swapoff(kauth_cred_t cred, struct vnode *vp)
 203 {
 204         int error;
 205
 206 #if SECURITY_MAC_CHECK_ENFORCE
 207         /* 21167099 - only check if we allow write */
 208         if (!mac_system_enforce)
 209                 return (0);
 210 #endif
 211
 212         MAC_CHECK(system_check_swapoff, cred, vp, vp->v_label);
 213         return (error);
 214 }
 215
 216 int
 217 mac_system_check_sysctlbyname(kauth_cred_t cred, const char *namestring, int *name,
 218                               u_int namelen, user_addr_t oldctl, size_t oldlen,
 219                               user_addr_t newctl, size_t newlen)
 220 {
 221         int error;
 222
 223 #if SECURITY_MAC_CHECK_ENFORCE
 224         /* 21167099 - only check if we allow write */
 225         if (!mac_system_enforce)
 226                 return (0);
 227 #endif
 228
 229         MAC_CHECK(system_check_sysctlbyname, cred, namestring,
 230             name, namelen, oldctl, oldlen, newctl, newlen);
 231
 232         return (error);
 233 }
 234
 235 int
 236 mac_system_check_kas_info(kauth_cred_t cred, int selector)
 237 {
 238         int error;
 239
 240 #if SECURITY_MAC_CHECK_ENFORCE
 241         /* 21167099 - only check if we allow write */
 242         if (!mac_system_enforce)
 243                 return (0);
 244 #endif
 245
 246         MAC_CHECK(system_check_kas_info, cred, selector);
 247
 248         return (error);
 249 }