1 /*- 2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 3 * Copyright (c) 2001, 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed by Robert Watson for the TrustedBSD Project. 7 * 8 * This software was developed for the FreeBSD Project in part by NAI Labs, 9 * the Security Research Division of Network Associates, Inc. under 10 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA 11 * CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. The names of the authors may not be used to endorse or promote 22 * products derived from this software without specific prior written 23 * permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD$ 38 */ 39 /* 40 * Userland/kernel interface for Mandatory Access Control. 41 * 42 * The POSIX.1e implementation page may be reached at: 43 * http://www.trustedbsd.org/ 44 */ 45 #ifndef _SYS_MAC_H 46 #define _SYS_MAC_H 47 48 #include <sys/_label.h> 49 50 #ifndef _POSIX_MAC 51 #define _POSIX_MAC 52 #endif 53 54 /* 55 * XXXMAC: The single MAC extended attribute will be deprecated once 56 * compound EA writes on a single target file can be performed cleanly 57 * with UFS2. 58 */ 59 #define FREEBSD_MAC_EXTATTR_NAME "freebsd.mac" 60 #define FREEBSD_MAC_EXTATTR_NAMESPACE EXTATTR_NAMESPACE_SYSTEM 61 62 /* 63 * MAC framework-related constants and limits. 64 */ 65 #define MAC_MAX_POLICY_NAME 32 66 67 /* 68 * XXXMAC: Per-policy structures will be moved from mac.h to per-policy 69 * include files once the revised user interface is available. 70 */ 71 72 /* 73 * Structures and constants associated with a Biba Integrity policy. 74 * mac_biba represents a Biba label, with mb_type determining its properties, 75 * and mb_grade represents the hierarchal grade if valid for the current 76 * mb_type. These structures will move to mac_biba.h once we have dymamic 77 * labels exposed to userland. 78 */ 79 struct mac_biba_element { 80 u_short mbe_type; 81 u_short mbe_grade; 82 }; 83 84 /* 85 * Biba labels consist of two components: a single label, and a label 86 * range. Depending on the context, one or both may be used; the mb_flags 87 * field permits the provider to indicate what fields are intended for 88 * use. 89 */ 90 struct mac_biba { 91 int mb_flags; 92 struct mac_biba_element mb_single; 93 struct mac_biba_element mb_rangelow, mb_rangehigh; 94 }; 95 96 /* 97 * Structures and constants associated with a Multi-Level Security policy. 98 * mac_mls represents an MLS label, with mm_type determining its properties, 99 * and mm_level represents the hierarchal sensitivity level if valid for the 100 * current mm_type. These structures will move to mac_mls.h once we have 101 * dynamic labels exposed to userland. 102 */ 103 struct mac_mls_element { 104 u_short mme_type; 105 u_short mme_level; 106 }; 107 108 /* 109 * MLS labels consist of two components: a single label, and a label 110 * range. Depending on the context, one or both may be used; the mb_flags 111 * field permits the provider to indicate what fields are intended for 112 * use. 113 */ 114 struct mac_mls { 115 int mm_flags; 116 struct mac_mls_element mm_single; 117 struct mac_mls_element mm_rangelow, mm_rangehigh; 118 }; 119 120 /* 121 * Structures and constants associated with a Type Enforcement policy. 122 * mac_te represents a Type Enforcement label. 123 */ 124 #define MAC_TE_TYPE_MAXLEN 32 125 struct mac_te { 126 char mt_type[MAC_TE_TYPE_MAXLEN+1]; /* TE type */ 127 }; 128 129 struct mac_sebsd { 130 uint32_t ms_psid; /* persistent sid storage */ 131 }; 132 133 /* 134 * Composite structures and constants which combine the various policy 135 * elements into common structures to be associated with subjects and 136 * objects. 137 */ 138 struct mac { 139 int m_macflags; 140 struct mac_biba m_biba; 141 struct mac_mls m_mls; 142 struct mac_te m_te; 143 struct mac_sebsd m_sebsd; 144 }; 145 typedef struct mac *mac_t; 146 147 #define MAC_FLAG_INITIALIZED 0x00000001 /* Is initialized. */ 148 149 #ifndef _KERNEL 150 151 /* 152 * POSIX.1e functions visible in the application namespace. 153 */ 154 int mac_dominate(const mac_t _labela, const mac_t _labelb); 155 int mac_equal(const mac_t labela, const mac_t _labelb); 156 int mac_free(void *_buf_p); 157 mac_t mac_from_text(const char *_text_p); 158 mac_t mac_get_fd(int _fildes); 159 mac_t mac_get_file(const char *_path_p); 160 mac_t mac_get_proc(void); 161 mac_t mac_glb(const mac_t _labela, const mac_t _labelb); 162 mac_t mac_lub(const mac_t _labela, const mac_t _labelb); 163 int mac_set_fd(int _fildes, const mac_t _label); 164 int mac_set_file(const char *_path_p, mac_t _label); 165 int mac_set_proc(const mac_t _label); 166 ssize_t mac_size(mac_t _label); 167 char * mac_to_text(const mac_t _label, size_t *_len_p); 168 int mac_valid(const mac_t _label); 169 170 /* 171 * Extensions to POSIX.1e visible in the application namespace. 172 */ 173 int mac_is_present_np(const char *_policyname); 174 int mac_syscall(const char *_policyname, int call, void *arg); 175 176 /* 177 * System calls wrapped by some POSIX.1e functions. 178 */ 179 int __mac_get_fd(int _fd, struct mac *_mac_p); 180 int __mac_get_file(const char *_path_p, struct mac *_mac_p); 181 int __mac_get_proc(struct mac *_mac_p); 182 int __mac_set_fd(int fd, struct mac *_mac_p); 183 int __mac_set_file(const char *_path_p, struct mac *_mac_p); 184 int __mac_set_proc(struct mac *_mac_p); 185 186 #else /* _KERNEL */ 187 188 /* 189 * Kernel functions to manage and evaluate labels. 190 */ 191 struct bpf_d; 192 struct componentname; 193 struct devfs_dirent; 194 struct ifnet; 195 struct ifreq; 196 struct ipq; 197 struct mbuf; 198 struct mount; 199 struct proc; 200 struct sockaddr; 201 struct socket; 202 struct pipe; 203 struct thread; 204 struct timespec; 205 struct ucred; 206 struct uio; 207 struct vattr; 208 struct vnode; 209 210 #include <sys/acl.h> /* XXX acl_type_t */ 211 212 struct vop_refreshlabel_args; 213 struct vop_setlabel_args; 214 215 /* 216 * Label operations. 217 */ 218 void mac_init_bpfdesc(struct bpf_d *); 219 void mac_init_cred(struct ucred *); 220 void mac_init_devfsdirent(struct devfs_dirent *); 221 void mac_init_ifnet(struct ifnet *); 222 void mac_init_ipq(struct ipq *); 223 int mac_init_socket(struct socket *, int flag); 224 void mac_init_pipe(struct pipe *); 225 int mac_init_mbuf(struct mbuf *m, int flag); 226 void mac_init_mount(struct mount *); 227 void mac_init_vnode(struct vnode *); 228 void mac_destroy_bpfdesc(struct bpf_d *); 229 void mac_destroy_cred(struct ucred *); 230 void mac_destroy_devfsdirent(struct devfs_dirent *); 231 void mac_destroy_ifnet(struct ifnet *); 232 void mac_destroy_ipq(struct ipq *); 233 void mac_destroy_socket(struct socket *); 234 void mac_destroy_pipe(struct pipe *); 235 void mac_destroy_mbuf(struct mbuf *); 236 void mac_destroy_mount(struct mount *); 237 void mac_destroy_vnode(struct vnode *); 238 239 /* 240 * Labeling event operations: file system objects, and things that 241 * look a lot like file system objects. 242 */ 243 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 244 void mac_create_devfs_directory(char *dirname, int dirnamelen, 245 struct devfs_dirent *de); 246 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 247 void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd, 248 struct devfs_dirent *de); 249 void mac_create_vnode(struct ucred *cred, struct vnode *parent, 250 struct vnode *child); 251 void mac_create_mount(struct ucred *cred, struct mount *mp); 252 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 253 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 254 struct label *newlabel); 255 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 256 void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred); 257 void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp); 258 259 /* 260 * Labeling event operations: IPC objects. 261 */ 262 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 263 void mac_create_socket(struct ucred *cred, struct socket *socket); 264 void mac_create_socket_from_socket(struct socket *oldsocket, 265 struct socket *newsocket); 266 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 267 struct socket *socket); 268 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 269 struct socket *newsocket); 270 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 271 272 /* 273 * Labeling event operations: network objects. 274 */ 275 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 276 void mac_create_ifnet(struct ifnet *ifp); 277 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 278 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 279 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 280 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 281 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 282 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 283 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 284 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 285 struct ifnet *ifnet, struct mbuf *newmbuf); 286 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 287 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 288 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 289 290 /* 291 * Labeling event operations: processes. 292 */ 293 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 294 void mac_execve_transition(struct ucred *old, struct ucred *new, 295 struct vnode *vp); 296 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 297 void mac_create_proc0(struct ucred *cred); 298 void mac_create_proc1(struct ucred *cred); 299 void mac_thread_userret(struct thread *td); 300 301 /* Access control checks. */ 302 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 303 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 304 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 305 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 306 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 307 unsigned long cmd, void *data); 308 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 309 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 310 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 311 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 312 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 313 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 314 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 315 int signum); 316 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 317 struct sockaddr *sockaddr); 318 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 319 struct sockaddr *sockaddr); 320 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 321 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 322 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 323 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 324 int flags); 325 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 326 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 327 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 328 struct componentname *cnp, struct vattr *vap); 329 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 330 struct vnode *vp, struct componentname *cnp); 331 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 332 acl_type_t type); 333 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 334 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 335 acl_type_t type); 336 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 337 int attrnamespace, const char *name, struct uio *uio); 338 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 339 struct vnode *vp, struct componentname *cnp); 340 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 341 struct componentname *cnp); 342 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 343 int prot); 344 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 345 int prot); 346 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 347 mode_t acc_mode); 348 int mac_check_vnode_poll(struct ucred *active_cred, 349 struct ucred *file_cred, struct vnode *vp); 350 int mac_check_vnode_read(struct ucred *active_cred, 351 struct ucred *file_cred, struct vnode *vp); 352 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 353 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 354 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 355 struct vnode *vp, struct componentname *cnp); 356 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 357 struct vnode *vp, int samedir, struct componentname *cnp); 358 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 359 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 360 acl_type_t type, struct acl *acl); 361 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 362 int attrnamespace, const char *name, struct uio *uio); 363 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 364 u_long flags); 365 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 366 mode_t mode); 367 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 368 uid_t uid, gid_t gid); 369 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 370 struct timespec atime, struct timespec mtime); 371 int mac_check_vnode_stat(struct ucred *active_cred, 372 struct ucred *file_cred, struct vnode *vp); 373 int mac_check_vnode_write(struct ucred *active_cred, 374 struct ucred *file_cred, struct vnode *vp); 375 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 376 struct mac *extmac); 377 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 378 struct mac *extmac); 379 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 380 struct ifnet *ifnet); 381 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 382 struct ifnet *ifnet); 383 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 384 struct mac *extmac); 385 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 386 struct label *label); 387 388 /* 389 * Calls to help various file systems implement labeling functionality 390 * using their existing EA implementation. 391 */ 392 int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp, 393 struct ucred *cred); 394 int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap); 395 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 396 397 #endif /* _KERNEL */ 398 399 #endif /* !_SYS_MAC_H */ 400