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 #define MAC_BIBA_MAX_COMPARTMENTS 256 80 struct mac_biba_element { 81 u_short mbe_type; 82 u_short mbe_grade; 83 u_char mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3]; 84 }; 85 86 /* 87 * Biba labels consist of two components: a single label, and a label 88 * range. Depending on the context, one or both may be used; the mb_flags 89 * field permits the provider to indicate what fields are intended for 90 * use. 91 */ 92 struct mac_biba { 93 int mb_flags; 94 struct mac_biba_element mb_single; 95 struct mac_biba_element mb_rangelow, mb_rangehigh; 96 }; 97 98 /* 99 * Structures and constants associated with a Multi-Level Security policy. 100 * mac_mls represents an MLS label, with mm_type determining its properties, 101 * and mm_level represents the hierarchal sensitivity level if valid for the 102 * current mm_type. These structures will move to mac_mls.h once we have 103 * dynamic labels exposed to userland. 104 */ 105 #define MAC_MLS_MAX_COMPARTMENTS 256 106 struct mac_mls_element { 107 u_short mme_type; 108 u_short mme_level; 109 u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3]; 110 }; 111 112 /* 113 * MLS labels consist of two components: a single label, and a label 114 * range. Depending on the context, one or both may be used; the mb_flags 115 * field permits the provider to indicate what fields are intended for 116 * use. 117 */ 118 struct mac_mls { 119 int mm_flags; 120 struct mac_mls_element mm_single; 121 struct mac_mls_element mm_rangelow, mm_rangehigh; 122 }; 123 124 /* 125 * Structures and constants associated with a Type Enforcement policy. 126 * mac_te represents a Type Enforcement label. 127 */ 128 #define MAC_TE_TYPE_MAXLEN 32 129 struct mac_te { 130 char mt_type[MAC_TE_TYPE_MAXLEN+1]; /* TE type */ 131 }; 132 133 struct mac_sebsd { 134 uint32_t ms_psid; /* persistent sid storage */ 135 }; 136 137 /* 138 * Composite structures and constants which combine the various policy 139 * elements into common structures to be associated with subjects and 140 * objects. 141 */ 142 struct mac { 143 int m_macflags; 144 struct mac_biba m_biba; 145 struct mac_mls m_mls; 146 struct mac_te m_te; 147 struct mac_sebsd m_sebsd; 148 }; 149 typedef struct mac *mac_t; 150 151 #define MAC_FLAG_INITIALIZED 0x00000001 /* Is initialized. */ 152 153 #ifndef _KERNEL 154 155 /* 156 * POSIX.1e functions visible in the application namespace. 157 */ 158 int mac_dominate(const mac_t _labela, const mac_t _labelb); 159 int mac_equal(const mac_t labela, const mac_t _labelb); 160 int mac_free(void *_buf_p); 161 mac_t mac_from_text(const char *_text_p); 162 mac_t mac_get_fd(int _fildes); 163 mac_t mac_get_file(const char *_path_p); 164 mac_t mac_get_proc(void); 165 mac_t mac_glb(const mac_t _labela, const mac_t _labelb); 166 mac_t mac_lub(const mac_t _labela, const mac_t _labelb); 167 int mac_set_fd(int _fildes, const mac_t _label); 168 int mac_set_file(const char *_path_p, mac_t _label); 169 int mac_set_proc(const mac_t _label); 170 ssize_t mac_size(mac_t _label); 171 char * mac_to_text(const mac_t _label, size_t *_len_p); 172 int mac_valid(const mac_t _label); 173 174 /* 175 * Extensions to POSIX.1e visible in the application namespace. 176 */ 177 int mac_is_present_np(const char *_policyname); 178 int mac_syscall(const char *_policyname, int call, void *arg); 179 180 /* 181 * System calls wrapped by some POSIX.1e functions. 182 */ 183 int __mac_get_fd(int _fd, struct mac *_mac_p); 184 int __mac_get_file(const char *_path_p, struct mac *_mac_p); 185 int __mac_get_proc(struct mac *_mac_p); 186 int __mac_set_fd(int fd, struct mac *_mac_p); 187 int __mac_set_file(const char *_path_p, struct mac *_mac_p); 188 int __mac_set_proc(struct mac *_mac_p); 189 190 #else /* _KERNEL */ 191 192 /* 193 * Kernel functions to manage and evaluate labels. 194 */ 195 struct bpf_d; 196 struct componentname; 197 struct devfs_dirent; 198 struct ifnet; 199 struct ifreq; 200 struct ipq; 201 struct mbuf; 202 struct mount; 203 struct proc; 204 struct sockaddr; 205 struct socket; 206 struct pipe; 207 struct thread; 208 struct timespec; 209 struct ucred; 210 struct uio; 211 struct vattr; 212 struct vnode; 213 214 #include <sys/acl.h> /* XXX acl_type_t */ 215 216 struct vop_refreshlabel_args; 217 struct vop_setlabel_args; 218 219 /* 220 * Label operations. 221 */ 222 void mac_init_bpfdesc(struct bpf_d *); 223 void mac_init_cred(struct ucred *); 224 void mac_init_devfsdirent(struct devfs_dirent *); 225 void mac_init_ifnet(struct ifnet *); 226 void mac_init_ipq(struct ipq *); 227 int mac_init_socket(struct socket *, int flag); 228 void mac_init_pipe(struct pipe *); 229 int mac_init_mbuf(struct mbuf *m, int flag); 230 void mac_init_mount(struct mount *); 231 void mac_init_vnode(struct vnode *); 232 void mac_destroy_bpfdesc(struct bpf_d *); 233 void mac_destroy_cred(struct ucred *); 234 void mac_destroy_devfsdirent(struct devfs_dirent *); 235 void mac_destroy_ifnet(struct ifnet *); 236 void mac_destroy_ipq(struct ipq *); 237 void mac_destroy_socket(struct socket *); 238 void mac_destroy_pipe(struct pipe *); 239 void mac_destroy_mbuf(struct mbuf *); 240 void mac_destroy_mount(struct mount *); 241 void mac_destroy_vnode(struct vnode *); 242 243 /* 244 * Labeling event operations: file system objects, and things that 245 * look a lot like file system objects. 246 */ 247 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 248 void mac_create_devfs_directory(char *dirname, int dirnamelen, 249 struct devfs_dirent *de); 250 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 251 void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd, 252 struct devfs_dirent *de); 253 void mac_create_vnode(struct ucred *cred, struct vnode *parent, 254 struct vnode *child); 255 void mac_create_mount(struct ucred *cred, struct mount *mp); 256 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 257 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 258 struct label *newlabel); 259 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 260 void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred); 261 void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp); 262 263 /* 264 * Labeling event operations: IPC objects. 265 */ 266 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 267 void mac_create_socket(struct ucred *cred, struct socket *socket); 268 void mac_create_socket_from_socket(struct socket *oldsocket, 269 struct socket *newsocket); 270 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 271 struct socket *socket); 272 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 273 struct socket *newsocket); 274 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 275 276 /* 277 * Labeling event operations: network objects. 278 */ 279 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 280 void mac_create_ifnet(struct ifnet *ifp); 281 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 282 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 283 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 284 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 285 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 286 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 287 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 288 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 289 struct ifnet *ifnet, struct mbuf *newmbuf); 290 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 291 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 292 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 293 294 /* 295 * Labeling event operations: processes. 296 */ 297 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 298 void mac_execve_transition(struct ucred *old, struct ucred *new, 299 struct vnode *vp); 300 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 301 void mac_create_proc0(struct ucred *cred); 302 void mac_create_proc1(struct ucred *cred); 303 void mac_thread_userret(struct thread *td); 304 305 /* Access control checks. */ 306 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 307 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 308 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 309 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 310 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 311 unsigned long cmd, void *data); 312 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 313 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 314 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 315 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 316 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 317 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 318 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 319 int signum); 320 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 321 struct sockaddr *sockaddr); 322 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 323 struct sockaddr *sockaddr); 324 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 325 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 326 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 327 int mac_check_socket_send(struct ucred *cred, struct socket *so); 328 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 329 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 330 int flags); 331 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 332 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 333 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 334 struct componentname *cnp, struct vattr *vap); 335 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 336 struct vnode *vp, struct componentname *cnp); 337 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 338 acl_type_t type); 339 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 340 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 341 acl_type_t type); 342 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 343 int attrnamespace, const char *name, struct uio *uio); 344 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 345 struct vnode *vp, struct componentname *cnp); 346 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 347 struct componentname *cnp); 348 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 349 int prot); 350 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 351 int prot); 352 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 353 mode_t acc_mode); 354 int mac_check_vnode_poll(struct ucred *active_cred, 355 struct ucred *file_cred, struct vnode *vp); 356 int mac_check_vnode_read(struct ucred *active_cred, 357 struct ucred *file_cred, struct vnode *vp); 358 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 359 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 360 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 361 struct vnode *vp, struct componentname *cnp); 362 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 363 struct vnode *vp, int samedir, struct componentname *cnp); 364 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 365 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 366 acl_type_t type, struct acl *acl); 367 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 368 int attrnamespace, const char *name, struct uio *uio); 369 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 370 u_long flags); 371 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 372 mode_t mode); 373 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 374 uid_t uid, gid_t gid); 375 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 376 struct timespec atime, struct timespec mtime); 377 int mac_check_vnode_stat(struct ucred *active_cred, 378 struct ucred *file_cred, struct vnode *vp); 379 int mac_check_vnode_write(struct ucred *active_cred, 380 struct ucred *file_cred, struct vnode *vp); 381 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 382 struct mac *extmac); 383 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 384 struct mac *extmac); 385 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 386 struct ifnet *ifnet); 387 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 388 struct ifnet *ifnet); 389 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 390 struct mac *extmac); 391 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 392 struct label *label); 393 394 /* 395 * Calls to help various file systems implement labeling functionality 396 * using their existing EA implementation. 397 */ 398 int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp, 399 struct ucred *cred); 400 int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap); 401 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 402 403 #endif /* _KERNEL */ 404 405 #endif /* !_SYS_MAC_H */ 406