security/mac_socket.c

   1 /*
   2  * Copyright (c) 2007-2012 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) 1999-2002 Robert N. M. Watson
  30  * Copyright (c) 2001 Ilmar S. Habibulin
  31  * Copyright (c) 2001-2005 Networks Associates Technology, Inc.
  32  * Copyright (c) 2005 SPARTA, Inc.
  33  * All rights reserved.
  34  *
  35  * This software was developed by Robert Watson and Ilmar Habibulin for the
  36  * TrustedBSD Project.
  37  *
  38  * This software was developed for the FreeBSD Project in part by McAfee
  39  * Research, the Technology Research Division of Network Associates, Inc.
  40  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
  41  * DARPA CHATS research program.
  42  *
  43  * This software was enhanced by SPARTA ISSO under SPAWAR contract
  44  * N66001-04-C-6019 ("SEFOS").
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  */
  67
  68 #include <sys/cdefs.h>
  69
  70 #include <sys/param.h>
  71 #include <sys/kernel.h>
  72 #include <sys/lock.h>
  73 #include <sys/malloc.h>
  74 #include <sys/sbuf.h>
  75 #include <sys/systm.h>
  76 #include <sys/mount.h>
  77 #include <sys/file.h>
  78 #include <sys/namei.h>
  79 #include <sys/protosw.h>
  80 #include <sys/socket.h>
  81 #include <sys/socketvar.h>
  82 #include <sys/sysctl.h>
  83 #include <sys/kpi_socket.h>
  84
  85 #include <security/mac_internal.h>
  86
  87 int
  88 mac_socket_check_accept(kauth_cred_t cred, struct socket *so)
  89 {
  90         int error;
  91
  92 #if SECURITY_MAC_CHECK_ENFORCE
  93         /* 21167099 - only check if we allow write */
  94         if (!mac_socket_enforce) {
  95                 return 0;
  96         }
  97 #endif
  98
  99         MAC_CHECK(socket_check_accept, cred,
 100             (socket_t)so, so->so_label);
 101         return error;
 102 }
 103
 104 #if CONFIG_MACF_SOCKET_SUBSET
 105 int
 106 mac_socket_check_accepted(kauth_cred_t cred, struct socket *so)
 107 {
 108         struct sockaddr *sockaddr;
 109         int error;
 110
 111 #if SECURITY_MAC_CHECK_ENFORCE
 112         /* 21167099 - only check if we allow write */
 113         if (!mac_socket_enforce) {
 114                 return 0;
 115         }
 116 #endif
 117
 118         if (sock_getaddr((socket_t)so, &sockaddr, 1) != 0) {
 119                 error = ECONNABORTED;
 120         } else {
 121                 MAC_CHECK(socket_check_accepted, cred,
 122                     (socket_t)so, so->so_label, sockaddr);
 123                 sock_freeaddr(sockaddr);
 124         }
 125         return error;
 126 }
 127 #endif
 128
 129 int
 130 mac_socket_check_bind(kauth_cred_t ucred, struct socket *so,
 131     struct sockaddr *sockaddr)
 132 {
 133         int error;
 134
 135 #if SECURITY_MAC_CHECK_ENFORCE
 136         /* 21167099 - only check if we allow write */
 137         if (!mac_socket_enforce) {
 138                 return 0;
 139         }
 140 #endif
 141
 142         MAC_CHECK(socket_check_bind, ucred,
 143             (socket_t)so, so->so_label, sockaddr);
 144         return error;
 145 }
 146
 147 int
 148 mac_socket_check_connect(kauth_cred_t cred, struct socket *so,
 149     struct sockaddr *sockaddr)
 150 {
 151         int error;
 152
 153 #if SECURITY_MAC_CHECK_ENFORCE
 154         /* 21167099 - only check if we allow write */
 155         if (!mac_socket_enforce) {
 156                 return 0;
 157         }
 158 #endif
 159
 160         MAC_CHECK(socket_check_connect, cred,
 161             (socket_t)so, so->so_label,
 162             sockaddr);
 163         return error;
 164 }
 165
 166 int
 167 mac_socket_check_create(kauth_cred_t cred, int domain, int type, int protocol)
 168 {
 169         int error;
 170
 171 #if SECURITY_MAC_CHECK_ENFORCE
 172         /* 21167099 - only check if we allow write */
 173         if (!mac_socket_enforce) {
 174                 return 0;
 175         }
 176 #endif
 177
 178         MAC_CHECK(socket_check_create, cred, domain, type, protocol);
 179         return error;
 180 }
 181
 182 int
 183 mac_socket_check_ioctl(kauth_cred_t cred, struct socket *so, u_long cmd)
 184 {
 185         int error;
 186
 187 #if SECURITY_MAC_CHECK_ENFORCE
 188         /* 21167099 - only check if we allow write */
 189         if (!mac_socket_enforce) {
 190                 return 0;
 191         }
 192 #endif
 193
 194         MAC_CHECK(socket_check_ioctl, cred,
 195             (socket_t)so, cmd, so->so_label);
 196         return error;
 197 }
 198
 199 int
 200 mac_socket_check_stat(kauth_cred_t cred, struct socket *so)
 201 {
 202         int error;
 203
 204 #if SECURITY_MAC_CHECK_ENFORCE
 205         /* 21167099 - only check if we allow write */
 206         if (!mac_socket_enforce) {
 207                 return 0;
 208         }
 209 #endif
 210
 211         MAC_CHECK(socket_check_stat, cred,
 212             (socket_t)so, so->so_label);
 213         return error;
 214 }
 215
 216 int
 217 mac_socket_check_listen(kauth_cred_t cred, struct socket *so)
 218 {
 219         int error;
 220
 221 #if SECURITY_MAC_CHECK_ENFORCE
 222         /* 21167099 - only check if we allow write */
 223         if (!mac_socket_enforce) {
 224                 return 0;
 225         }
 226 #endif
 227
 228         MAC_CHECK(socket_check_listen, cred,
 229             (socket_t)so, so->so_label);
 230         return error;
 231 }
 232
 233 int
 234 mac_socket_check_receive(kauth_cred_t cred, struct socket *so)
 235 {
 236         int error;
 237
 238 #if SECURITY_MAC_CHECK_ENFORCE
 239         /* 21167099 - only check if we allow write */
 240         if (!mac_socket_enforce) {
 241                 return 0;
 242         }
 243 #endif
 244
 245         MAC_CHECK(socket_check_receive, cred,
 246             (socket_t)so, so->so_label);
 247         return error;
 248 }
 249
 250 int
 251 mac_socket_check_received(kauth_cred_t cred, struct socket *so, struct sockaddr *saddr)
 252 {
 253         int error;
 254
 255 #if SECURITY_MAC_CHECK_ENFORCE
 256         /* 21167099 - only check if we allow write */
 257         if (!mac_socket_enforce) {
 258                 return 0;
 259         }
 260 #endif
 261
 262         MAC_CHECK(socket_check_received, cred,
 263             so, so->so_label, saddr);
 264         return error;
 265 }
 266
 267 int
 268 mac_socket_check_send(kauth_cred_t cred, struct socket *so,
 269     struct sockaddr *sockaddr)
 270 {
 271         int error;
 272
 273 #if SECURITY_MAC_CHECK_ENFORCE
 274         /* 21167099 - only check if we allow write */
 275         if (!mac_socket_enforce) {
 276                 return 0;
 277         }
 278 #endif
 279
 280         MAC_CHECK(socket_check_send, cred,
 281             (socket_t)so, so->so_label, sockaddr);
 282         return error;
 283 }
 284
 285 int
 286 mac_socket_check_setsockopt(kauth_cred_t cred, struct socket *so,
 287     struct sockopt *sopt)
 288 {
 289         int error;
 290
 291 #if SECURITY_MAC_CHECK_ENFORCE
 292         /* 21167099 - only check if we allow write */
 293         if (!mac_socket_enforce) {
 294                 return 0;
 295         }
 296 #endif
 297
 298         MAC_CHECK(socket_check_setsockopt, cred,
 299             (socket_t)so, so->so_label, sopt);
 300         return error;
 301 }
 302
 303 int
 304 mac_socket_check_getsockopt(kauth_cred_t cred, struct socket *so,
 305     struct sockopt *sopt)
 306 {
 307         int error;
 308
 309 #if SECURITY_MAC_CHECK_ENFORCE
 310         /* 21167099 - only check if we allow write */
 311         if (!mac_socket_enforce) {
 312                 return 0;
 313         }
 314 #endif
 315
 316         MAC_CHECK(socket_check_getsockopt, cred,
 317             (socket_t)so, so->so_label, sopt);
 318         return error;
 319 }