1 /*- 2 * Copyright (c) 2002, 2003 Networks Associates Technology, Inc. 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> 33 __FBSDID("$FreeBSD$"); 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/mac.h> 44 #include <sys/sbuf.h> 45 #include <sys/systm.h> 46 #include <sys/vnode.h> 47 #include <sys/pipe.h> 48 #include <sys/sysctl.h> 49 50 #include <security/mac/mac_framework.h> 51 #include <security/mac/mac_internal.h> 52 #include <security/mac/mac_policy.h> 53 54 struct label * 55 mac_pipe_label_alloc(void) 56 { 57 struct label *label; 58 59 label = mac_labelzone_alloc(M_WAITOK); 60 MAC_PERFORM(init_pipe_label, label); 61 return (label); 62 } 63 64 void 65 mac_init_pipe(struct pipepair *pp) 66 { 67 68 pp->pp_label = mac_pipe_label_alloc(); 69 } 70 71 void 72 mac_pipe_label_free(struct label *label) 73 { 74 75 MAC_PERFORM(destroy_pipe_label, label); 76 mac_labelzone_free(label); 77 } 78 79 void 80 mac_destroy_pipe(struct pipepair *pp) 81 { 82 83 mac_pipe_label_free(pp->pp_label); 84 pp->pp_label = NULL; 85 } 86 87 void 88 mac_copy_pipe_label(struct label *src, struct label *dest) 89 { 90 91 MAC_PERFORM(copy_pipe_label, src, dest); 92 } 93 94 int 95 mac_externalize_pipe_label(struct label *label, char *elements, 96 char *outbuf, size_t outbuflen) 97 { 98 int error; 99 100 MAC_EXTERNALIZE(pipe, label, elements, outbuf, outbuflen); 101 102 return (error); 103 } 104 105 int 106 mac_internalize_pipe_label(struct label *label, char *string) 107 { 108 int error; 109 110 MAC_INTERNALIZE(pipe, label, string); 111 112 return (error); 113 } 114 115 void 116 mac_create_pipe(struct ucred *cred, struct pipepair *pp) 117 { 118 119 MAC_PERFORM(create_pipe, cred, pp, pp->pp_label); 120 } 121 122 static void 123 mac_relabel_pipe(struct ucred *cred, struct pipepair *pp, 124 struct label *newlabel) 125 { 126 127 MAC_PERFORM(relabel_pipe, cred, pp, pp->pp_label, newlabel); 128 } 129 130 int 131 mac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, 132 unsigned long cmd, void *data) 133 { 134 int error; 135 136 mtx_assert(&pp->pp_mtx, MA_OWNED); 137 138 MAC_CHECK(check_pipe_ioctl, cred, pp, pp->pp_label, cmd, data); 139 140 return (error); 141 } 142 143 int 144 mac_check_pipe_poll(struct ucred *cred, struct pipepair *pp) 145 { 146 int error; 147 148 mtx_assert(&pp->pp_mtx, MA_OWNED); 149 150 MAC_CHECK(check_pipe_poll, cred, pp, pp->pp_label); 151 152 return (error); 153 } 154 155 int 156 mac_check_pipe_read(struct ucred *cred, struct pipepair *pp) 157 { 158 int error; 159 160 mtx_assert(&pp->pp_mtx, MA_OWNED); 161 162 MAC_CHECK(check_pipe_read, cred, pp, pp->pp_label); 163 164 return (error); 165 } 166 167 static int 168 mac_check_pipe_relabel(struct ucred *cred, struct pipepair *pp, 169 struct label *newlabel) 170 { 171 int error; 172 173 mtx_assert(&pp->pp_mtx, MA_OWNED); 174 175 MAC_CHECK(check_pipe_relabel, cred, pp, pp->pp_label, newlabel); 176 177 return (error); 178 } 179 180 int 181 mac_check_pipe_stat(struct ucred *cred, struct pipepair *pp) 182 { 183 int error; 184 185 mtx_assert(&pp->pp_mtx, MA_OWNED); 186 187 MAC_CHECK(check_pipe_stat, cred, pp, pp->pp_label); 188 189 return (error); 190 } 191 192 int 193 mac_check_pipe_write(struct ucred *cred, struct pipepair *pp) 194 { 195 int error; 196 197 mtx_assert(&pp->pp_mtx, MA_OWNED); 198 199 MAC_CHECK(check_pipe_write, cred, pp, pp->pp_label); 200 201 return (error); 202 } 203 204 int 205 mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 206 struct label *label) 207 { 208 int error; 209 210 mtx_assert(&pp->pp_mtx, MA_OWNED); 211 212 error = mac_check_pipe_relabel(cred, pp, label); 213 if (error) 214 return (error); 215 216 mac_relabel_pipe(cred, pp, label); 217 218 return (0); 219 } 220