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/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 53 struct label * 54 mac_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 63 void 64 mac_init_pipe(struct pipepair *pp) 65 { 66 67 pp->pp_label = mac_pipe_label_alloc(); 68 } 69 70 void 71 mac_pipe_label_free(struct label *label) 72 { 73 74 MAC_PERFORM(destroy_pipe_label, label); 75 mac_labelzone_free(label); 76 } 77 78 void 79 mac_destroy_pipe(struct pipepair *pp) 80 { 81 82 mac_pipe_label_free(pp->pp_label); 83 pp->pp_label = NULL; 84 } 85 86 void 87 mac_copy_pipe_label(struct label *src, struct label *dest) 88 { 89 90 MAC_PERFORM(copy_pipe_label, src, dest); 91 } 92 93 int 94 mac_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 } 103 104 int 105 mac_internalize_pipe_label(struct label *label, char *string) 106 { 107 int error; 108 109 MAC_INTERNALIZE(pipe, label, string); 110 111 return (error); 112 } 113 114 void 115 mac_create_pipe(struct ucred *cred, struct pipepair *pp) 116 { 117 118 MAC_PERFORM(create_pipe, cred, pp, pp->pp_label); 119 } 120 121 static void 122 mac_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 } 128 129 int 130 mac_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 } 141 142 int 143 mac_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 } 153 154 int 155 mac_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 } 165 166 static int 167 mac_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 } 178 179 int 180 mac_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 } 190 191 int 192 mac_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 } 202 203 int 204 mac_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 } 219