3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project in part by Network 6 * Associates Laboratories, the Security Research Division of Network 7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 8 * as part of the DARPA CHATS research program. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h>
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34 35#include "opt_mac.h" 36 37#include <sys/param.h> 38#include <sys/kernel.h> 39#include <sys/lock.h> 40#include <sys/malloc.h> 41#include <sys/module.h> 42#include <sys/mutex.h> 43#include <sys/sbuf.h> 44#include <sys/systm.h> 45#include <sys/vnode.h> 46#include <sys/pipe.h> 47#include <sys/sysctl.h> 48 49#include <security/mac/mac_framework.h> 50#include <security/mac/mac_internal.h> 51#include <security/mac/mac_policy.h> 52 53struct label * 54mac_pipe_label_alloc(void) 55{ 56 struct label *label; 57 58 label = mac_labelzone_alloc(M_WAITOK); 59 MAC_PERFORM(init_pipe_label, label); 60 return (label); 61} 62 63void 64mac_init_pipe(struct pipepair *pp) 65{ 66 67 pp->pp_label = mac_pipe_label_alloc(); 68} 69 70void 71mac_pipe_label_free(struct label *label) 72{ 73 74 MAC_PERFORM(destroy_pipe_label, label); 75 mac_labelzone_free(label); 76} 77 78void 79mac_destroy_pipe(struct pipepair *pp) 80{ 81 82 mac_pipe_label_free(pp->pp_label); 83 pp->pp_label = NULL; 84} 85 86void 87mac_copy_pipe_label(struct label *src, struct label *dest) 88{ 89 90 MAC_PERFORM(copy_pipe_label, src, dest); 91} 92 93int 94mac_externalize_pipe_label(struct label *label, char *elements, 95 char *outbuf, size_t outbuflen) 96{ 97 int error; 98 99 MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen); 100 101 return (error); 102} 103 104int 105mac_internalize_pipe_label(struct label *label, char *string) 106{ 107 int error; 108 109 MAC_INTERNALIZE(pipe, label, string); 110 111 return (error); 112} 113 114void 115mac_create_pipe(struct ucred *cred, struct pipepair *pp) 116{ 117 118 MAC_PERFORM(create_pipe, cred, pp, pp->pp_label); 119} 120 121static void 122mac_relabel_pipe(struct ucred *cred, struct pipepair *pp, 123 struct label *newlabel) 124{ 125 126 MAC_PERFORM(relabel_pipe, cred, pp, pp->pp_label, newlabel); 127} 128 129int 130mac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, 131 unsigned long cmd, void *data) 132{ 133 int error; 134 135 mtx_assert(&pp->pp_mtx, MA_OWNED); 136 137 MAC_CHECK(check_pipe_ioctl, cred, pp, pp->pp_label, cmd, data); 138 139 return (error); 140} 141 142int 143mac_check_pipe_poll(struct ucred *cred, struct pipepair *pp) 144{ 145 int error; 146 147 mtx_assert(&pp->pp_mtx, MA_OWNED); 148 149 MAC_CHECK(check_pipe_poll, cred, pp, pp->pp_label); 150 151 return (error); 152} 153 154int 155mac_check_pipe_read(struct ucred *cred, struct pipepair *pp) 156{ 157 int error; 158 159 mtx_assert(&pp->pp_mtx, MA_OWNED); 160 161 MAC_CHECK(check_pipe_read, cred, pp, pp->pp_label); 162 163 return (error); 164} 165 166static int 167mac_check_pipe_relabel(struct ucred *cred, struct pipepair *pp, 168 struct label *newlabel) 169{ 170 int error; 171 172 mtx_assert(&pp->pp_mtx, MA_OWNED); 173 174 MAC_CHECK(check_pipe_relabel, cred, pp, pp->pp_label, newlabel); 175 176 return (error); 177} 178 179int 180mac_check_pipe_stat(struct ucred *cred, struct pipepair *pp) 181{ 182 int error; 183 184 mtx_assert(&pp->pp_mtx, MA_OWNED); 185 186 MAC_CHECK(check_pipe_stat, cred, pp, pp->pp_label); 187 188 return (error); 189} 190 191int 192mac_check_pipe_write(struct ucred *cred, struct pipepair *pp) 193{ 194 int error; 195 196 mtx_assert(&pp->pp_mtx, MA_OWNED); 197 198 MAC_CHECK(check_pipe_write, cred, pp, pp->pp_label); 199 200 return (error); 201} 202 203int 204mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 205 struct label *label) 206{ 207 int error; 208 209 mtx_assert(&pp->pp_mtx, MA_OWNED); 210 211 error = mac_check_pipe_relabel(cred, pp, label); 212 if (error) 213 return (error); 214 215 mac_relabel_pipe(cred, pp, label); 216 217 return (0); 218}
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