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FreeBSD/Linux Kernel Cross Reference
sys/security/mac_pipe.c

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    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) 2002, 2003 Networks Associates Technology, Inc.
   30  * Copyright (c) 2005 SPARTA, Inc.
   31  * All rights reserved.
   32  *
   33  * This software was developed for the FreeBSD Project in part by Network
   34  * Associates Laboratories, the Security Research Division of Network
   35  * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
   36  * as part of the DARPA CHATS research program.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  */
   59 
   60 #include <sys/cdefs.h>
   61 
   62 #include <sys/param.h>
   63 #include <sys/kernel.h>
   64 #include <sys/lock.h>
   65 #include <sys/malloc.h>
   66 #include <sys/sbuf.h>
   67 #include <sys/systm.h>
   68 #include <sys/vnode.h>
   69 #include <sys/pipe.h>
   70 #include <sys/sysctl.h>
   71 
   72 #include <security/mac_internal.h>
   73 
   74 
   75 struct label *
   76 mac_pipe_label_alloc(void)
   77 {
   78         struct label *label;
   79 
   80         label = mac_labelzone_alloc(MAC_WAITOK);
   81         if (label == NULL)
   82                 return (NULL);
   83         MAC_PERFORM(pipe_label_init, label);
   84         return (label);
   85 }
   86 
   87 void
   88 mac_pipe_label_init(struct pipe *cpipe)
   89 {
   90 
   91         cpipe->pipe_label = mac_pipe_label_alloc();
   92 }
   93 
   94 void
   95 mac_pipe_label_free(struct label *label)
   96 {
   97 
   98         MAC_PERFORM(pipe_label_destroy, label);
   99         mac_labelzone_free(label);
  100 }
  101 
  102 void
  103 mac_pipe_label_destroy(struct pipe *cpipe)
  104 {
  105 
  106         mac_pipe_label_free(cpipe->pipe_label);
  107         cpipe->pipe_label = NULL;
  108 }
  109 
  110 void
  111 mac_pipe_label_copy(struct label *src, struct label *dest)
  112 {
  113 
  114         MAC_PERFORM(pipe_label_copy, src, dest);
  115 }
  116 
  117 int
  118 mac_pipe_label_externalize(struct label *label, char *elements,
  119     char *outbuf, size_t outbuflen)
  120 {
  121         int error;
  122 
  123         error = MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen);
  124 
  125         return (error);
  126 }
  127 
  128 int
  129 mac_pipe_label_internalize(struct label *label, char *string)
  130 {
  131         int error;
  132 
  133         error = MAC_INTERNALIZE(pipe, label, string);
  134 
  135         return (error);
  136 }
  137 
  138 void
  139 mac_pipe_label_associate(kauth_cred_t cred, struct pipe *cpipe)
  140 {
  141 
  142         MAC_PERFORM(pipe_label_associate, cred, cpipe, cpipe->pipe_label);
  143 }
  144 
  145 int
  146 mac_pipe_check_kqfilter(kauth_cred_t cred, struct knote *kn,
  147     struct pipe *cpipe)
  148 {
  149         int error;
  150 
  151         if (!mac_pipe_enforce)
  152                 return (0);
  153 
  154         MAC_CHECK(pipe_check_kqfilter, cred, kn, cpipe, cpipe->pipe_label);
  155         return (error);
  156 }
  157 int
  158 mac_pipe_check_ioctl(kauth_cred_t cred, struct pipe *cpipe, u_int cmd)
  159 {
  160         int error;
  161 
  162         if (!mac_pipe_enforce)
  163                 return (0);
  164 
  165         MAC_CHECK(pipe_check_ioctl, cred, cpipe, cpipe->pipe_label, cmd);
  166 
  167         return (error);
  168 }
  169 
  170 int
  171 mac_pipe_check_read(kauth_cred_t cred, struct pipe *cpipe)
  172 {
  173         int error;
  174 
  175         if (!mac_pipe_enforce)
  176                 return (0);
  177 
  178         MAC_CHECK(pipe_check_read, cred, cpipe, cpipe->pipe_label);
  179 
  180         return (error);
  181 }
  182 
  183 static int
  184 mac_pipe_check_label_update(kauth_cred_t cred, struct pipe *cpipe,
  185     struct label *newlabel)
  186 {
  187         int error;
  188 
  189         if (!mac_pipe_enforce)
  190                 return (0);
  191 
  192         MAC_CHECK(pipe_check_label_update, cred, cpipe, cpipe->pipe_label, newlabel);
  193 
  194         return (error);
  195 }
  196 
  197 int
  198 mac_pipe_check_select(kauth_cred_t cred, struct pipe *cpipe, int which)
  199 {
  200         int error;
  201 
  202         if (!mac_pipe_enforce)
  203                 return (0);
  204 
  205         MAC_CHECK(pipe_check_select, cred, cpipe, cpipe->pipe_label, which);
  206 
  207         return (error);
  208 }
  209 
  210 int
  211 mac_pipe_check_stat(kauth_cred_t cred, struct pipe *cpipe)
  212 {
  213         int error;
  214 
  215         if (!mac_pipe_enforce)
  216                 return (0);
  217 
  218         MAC_CHECK(pipe_check_stat, cred, cpipe, cpipe->pipe_label);
  219 
  220         return (error);
  221 }
  222 
  223 int
  224 mac_pipe_check_write(kauth_cred_t cred, struct pipe *cpipe)
  225 {
  226         int error;
  227 
  228         if (!mac_pipe_enforce)
  229                 return (0);
  230 
  231         MAC_CHECK(pipe_check_write, cred, cpipe, cpipe->pipe_label);
  232 
  233         return (error);
  234 }
  235 
  236 int
  237 mac_pipe_label_update(kauth_cred_t cred, struct pipe *cpipe,
  238     struct label *label)
  239 {
  240         int error;
  241 
  242         error = mac_pipe_check_label_update(cred, cpipe, label);
  243         if (error)
  244                 return (error);
  245 
  246         MAC_PERFORM(pipe_label_update, cred, cpipe, cpipe->pipe_label, label);
  247 
  248         return (0);
  249 }

Cache object: a62dad9b491c36c16b56b020bc7f1001


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