1 /*- 2 * Copyright (c) 1999-2002 Robert N. M. Watson 3 * Copyright (c) 2001-2003 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 Network 9 * Associates Laboratories, the Security Research Division of Network 10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 11 * as part of the DARPA 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 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 /* 37 * Userland/kernel interface for Mandatory Access Control. 38 * 39 * The POSIX.1e implementation page may be reached at: 40 * http://www.trustedbsd.org/ 41 */ 42 #ifndef _SYS_MAC_H_ 43 #define _SYS_MAC_H_ 44 45 #include <sys/_label.h> 46 47 #ifndef _POSIX_MAC 48 #define _POSIX_MAC 49 #endif 50 51 /* 52 * MAC framework-related constants and limits. 53 */ 54 #define MAC_MAX_POLICY_NAME 32 55 #define MAC_MAX_LABEL_ELEMENT_NAME 32 56 #define MAC_MAX_LABEL_ELEMENT_DATA 4096 57 #define MAC_MAX_LABEL_BUF_LEN 8192 58 59 struct mac { 60 size_t m_buflen; 61 char *m_string; 62 }; 63 64 typedef struct mac *mac_t; 65 66 #ifndef _KERNEL 67 68 /* 69 * Location of the userland MAC framework configuration file. mac.conf 70 * binds policy names to shared libraries that understand those policies, 71 * as well as setting defaults for MAC-aware applications. 72 */ 73 #define MAC_CONFFILE "/etc/mac.conf" 74 75 /* 76 * Extended non-POSIX.1e interfaces that offer additional services 77 * available from the userland and kernel MAC frameworks. 78 */ 79 __BEGIN_DECLS 80 int mac_execve(char *fname, char **argv, char **envv, mac_t _label); 81 int mac_free(mac_t _label); 82 int mac_from_text(mac_t *_label, const char *_text); 83 int mac_get_fd(int _fd, mac_t _label); 84 int mac_get_file(const char *_path, mac_t _label); 85 int mac_get_link(const char *_path, mac_t _label); 86 int mac_get_peer(int _fd, mac_t _label); 87 int mac_get_pid(pid_t _pid, mac_t _label); 88 int mac_get_proc(mac_t _label); 89 int mac_is_present(const char *_policyname); 90 int mac_prepare(mac_t *_label, const char *_elements); 91 int mac_prepare_file_label(mac_t *_label); 92 int mac_prepare_ifnet_label(mac_t *_label); 93 int mac_prepare_process_label(mac_t *_label); 94 int mac_prepare_type(mac_t *_label, const char *_type); 95 int mac_set_fd(int _fildes, const mac_t _label); 96 int mac_set_file(const char *_path, mac_t _label); 97 int mac_set_link(const char *_path, mac_t _label); 98 int mac_set_proc(const mac_t _label); 99 int mac_syscall(const char *_policyname, int _call, void *_arg); 100 int mac_to_text(mac_t mac, char **_text); 101 __END_DECLS 102 103 #else /* _KERNEL */ 104 105 /* 106 * Kernel functions to manage and evaluate labels. 107 */ 108 struct bpf_d; 109 struct cdev; 110 struct componentname; 111 struct devfs_dirent; 112 struct ifnet; 113 struct ifreq; 114 struct inpcb; 115 struct image_params; 116 struct inpcb; 117 struct ipq; 118 struct m_tag; 119 struct mbuf; 120 struct mount; 121 struct msg; 122 struct msqid_kernel; 123 struct proc; 124 struct semid_kernel; 125 struct shmid_kernel; 126 struct sockaddr; 127 struct socket; 128 struct sysctl_oid; 129 struct sysctl_req; 130 struct pipepair; 131 struct thread; 132 struct timespec; 133 struct ucred; 134 struct uio; 135 struct vattr; 136 struct vnode; 137 138 #include <sys/acl.h> /* XXX acl_type_t */ 139 140 struct vop_setlabel_args; 141 142 /* 143 * Label operations. 144 */ 145 void mac_init_bpfdesc(struct bpf_d *); 146 void mac_init_cred(struct ucred *); 147 void mac_init_devfsdirent(struct devfs_dirent *); 148 void mac_init_ifnet(struct ifnet *); 149 int mac_init_inpcb(struct inpcb *, int flag); 150 void mac_init_sysv_msgmsg(struct msg *); 151 void mac_init_sysv_msgqueue(struct msqid_kernel*); 152 void mac_init_sysv_sema(struct semid_kernel*); 153 void mac_init_sysv_shm(struct shmid_kernel*); 154 int mac_init_ipq(struct ipq *, int flag); 155 int mac_init_socket(struct socket *, int flag); 156 void mac_init_pipe(struct pipepair *); 157 int mac_init_mbuf(struct mbuf *mbuf, int flag); 158 int mac_init_mbuf_tag(struct m_tag *, int flag); 159 void mac_init_mount(struct mount *); 160 void mac_init_proc(struct proc *); 161 void mac_init_vnode(struct vnode *); 162 void mac_copy_mbuf_tag(struct m_tag *, struct m_tag *); 163 void mac_copy_vnode_label(struct label *, struct label *label); 164 void mac_destroy_bpfdesc(struct bpf_d *); 165 void mac_destroy_cred(struct ucred *); 166 void mac_destroy_devfsdirent(struct devfs_dirent *); 167 void mac_destroy_ifnet(struct ifnet *); 168 void mac_destroy_inpcb(struct inpcb *); 169 void mac_destroy_sysv_msgmsg(struct msg *); 170 void mac_destroy_sysv_msgqueue(struct msqid_kernel *); 171 void mac_destroy_sysv_sema(struct semid_kernel *); 172 void mac_destroy_sysv_shm(struct shmid_kernel *); 173 void mac_destroy_ipq(struct ipq *); 174 void mac_destroy_socket(struct socket *); 175 void mac_destroy_pipe(struct pipepair *); 176 void mac_destroy_proc(struct proc *); 177 void mac_destroy_mbuf_tag(struct m_tag *); 178 void mac_destroy_mount(struct mount *); 179 void mac_destroy_vnode(struct vnode *); 180 181 struct label *mac_cred_label_alloc(void); 182 void mac_cred_label_free(struct label *label); 183 struct label *mac_vnode_label_alloc(void); 184 void mac_vnode_label_free(struct label *label); 185 186 /* 187 * Labeling event operations: file system objects, and things that 188 * look a lot like file system objects. 189 */ 190 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 191 struct vnode *vp); 192 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 193 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 194 void mac_create_devfs_device(struct mount *mp, struct cdev *dev, 195 struct devfs_dirent *de); 196 void mac_create_devfs_directory(struct mount *mp, char *dirname, 197 int dirnamelen, struct devfs_dirent *de); 198 void mac_create_devfs_symlink(struct ucred *cred, struct mount *mp, 199 struct devfs_dirent *dd, struct devfs_dirent *de); 200 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 201 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 202 void mac_create_mount(struct ucred *cred, struct mount *mp); 203 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 204 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 205 struct label *newlabel); 206 void mac_update_devfsdirent(struct mount *mp, struct devfs_dirent *de, 207 struct vnode *vp); 208 209 /* 210 * Labeling event operations: IPC objects. 211 */ 212 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 213 void mac_create_socket(struct ucred *cred, struct socket *socket); 214 void mac_create_socket_from_socket(struct socket *oldsocket, 215 struct socket *newsocket); 216 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 217 struct socket *socket); 218 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 219 struct socket *newsocket); 220 void mac_create_pipe(struct ucred *cred, struct pipepair *pp); 221 222 /* 223 * Labeling event operations: System V IPC primitives 224 */ 225 void mac_create_sysv_msgmsg(struct ucred *cred, 226 struct msqid_kernel *msqkptr, struct msg *msgptr); 227 void mac_create_sysv_msgqueue(struct ucred *cred, 228 struct msqid_kernel *msqkptr); 229 void mac_create_sysv_sema(struct ucred *cred, 230 struct semid_kernel *semakptr); 231 void mac_create_sysv_shm(struct ucred *cred, 232 struct shmid_kernel *shmsegptr); 233 234 /* 235 * Labeling event operations: network objects. 236 */ 237 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 238 void mac_create_ifnet(struct ifnet *ifp); 239 void mac_create_inpcb_from_socket(struct socket *so, struct inpcb *inp); 240 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 241 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 242 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 243 void mac_create_mbuf_from_inpcb(struct inpcb *inp, struct mbuf *m); 244 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 245 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 246 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 247 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 248 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 249 struct ifnet *ifnet, struct mbuf *newmbuf); 250 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 251 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 252 void mac_reflect_mbuf_icmp(struct mbuf *m); 253 void mac_reflect_mbuf_tcp(struct mbuf *m); 254 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 255 void mac_inpcb_sosetlabel(struct socket *so, struct inpcb *inp); 256 257 /* 258 * Labeling event operations: processes. 259 */ 260 void mac_copy_cred(struct ucred *cr1, struct ucred *cr2); 261 int mac_execve_enter(struct image_params *imgp, struct mac *mac_p); 262 void mac_execve_exit(struct image_params *imgp); 263 void mac_execve_transition(struct ucred *old, struct ucred *new, 264 struct vnode *vp, struct label *interpvnodelabel, 265 struct image_params *imgp); 266 int mac_execve_will_transition(struct ucred *old, struct vnode *vp, 267 struct label *interpvnodelabel, struct image_params *imgp); 268 void mac_create_proc0(struct ucred *cred); 269 void mac_create_proc1(struct ucred *cred); 270 void mac_thread_userret(struct thread *td); 271 272 /* 273 * Label cleanup operation: This is the inverse complement for the 274 * mac_create and associate type of hooks. This hook lets the policy 275 * module(s) perform a cleanup/flushing operation on the label 276 * associated with the objects, without freeing up the space allocated. 277 * This hook is useful in cases where it is desirable to remove any 278 * labeling reference when recycling any object to a pool. This hook 279 * does not replace the mac_destroy hooks. 280 */ 281 void mac_cleanup_sysv_msgmsg(struct msg *msgptr); 282 void mac_cleanup_sysv_msgqueue(struct msqid_kernel *msqkptr); 283 void mac_cleanup_sysv_sema(struct semid_kernel *semakptr); 284 void mac_cleanup_sysv_shm(struct shmid_kernel *shmsegptr); 285 286 /* Access control checks. */ 287 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 288 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 289 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 290 int mac_check_inpcb_deliver(struct inpcb *inp, struct mbuf *m); 291 int mac_check_sysv_msgmsq(struct ucred *cred, struct msg *msgptr, 292 struct msqid_kernel *msqkptr); 293 int mac_check_sysv_msgrcv(struct ucred *cred, struct msg *msgptr); 294 int mac_check_sysv_msgrmid(struct ucred *cred, struct msg *msgptr); 295 int mac_check_sysv_msqget(struct ucred *cred, 296 struct msqid_kernel *msqkptr); 297 int mac_check_sysv_msqsnd(struct ucred *cred, 298 struct msqid_kernel *msqkptr); 299 int mac_check_sysv_msqrcv(struct ucred *cred, 300 struct msqid_kernel *msqkptr); 301 int mac_check_sysv_msqctl(struct ucred *cred, 302 struct msqid_kernel *msqkptr, int cmd); 303 int mac_check_sysv_semctl(struct ucred *cred, 304 struct semid_kernel *semakptr, int cmd); 305 int mac_check_sysv_semget(struct ucred *cred, 306 struct semid_kernel *semakptr); 307 int mac_check_sysv_semop(struct ucred *cred,struct semid_kernel *semakptr, 308 size_t accesstype); 309 int mac_check_sysv_shmat(struct ucred *cred, 310 struct shmid_kernel *shmsegptr, int shmflg); 311 int mac_check_sysv_shmctl(struct ucred *cred, 312 struct shmid_kernel *shmsegptr, int cmd); 313 int mac_check_sysv_shmdt(struct ucred *cred, 314 struct shmid_kernel *shmsegptr); 315 int mac_check_sysv_shmget(struct ucred *cred, 316 struct shmid_kernel *shmsegptr, int shmflg); 317 int mac_check_kenv_dump(struct ucred *cred); 318 int mac_check_kenv_get(struct ucred *cred, char *name); 319 int mac_check_kenv_set(struct ucred *cred, char *name, char *value); 320 int mac_check_kenv_unset(struct ucred *cred, char *name); 321 int mac_check_kld_load(struct ucred *cred, struct vnode *vp); 322 int mac_check_kld_stat(struct ucred *cred); 323 int mac_check_kld_unload(struct ucred *cred); 324 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 325 int mac_check_pipe_ioctl(struct ucred *cred, struct pipepair *pp, 326 unsigned long cmd, void *data); 327 int mac_check_pipe_poll(struct ucred *cred, struct pipepair *pp); 328 int mac_check_pipe_read(struct ucred *cred, struct pipepair *pp); 329 int mac_check_pipe_stat(struct ucred *cred, struct pipepair *pp); 330 int mac_check_pipe_write(struct ucred *cred, struct pipepair *pp); 331 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 332 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 333 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 334 int signum); 335 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 336 struct sockaddr *sockaddr); 337 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 338 struct sockaddr *sockaddr); 339 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 340 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 341 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 342 int mac_check_socket_send(struct ucred *cred, struct socket *so); 343 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 344 int mac_check_sysarch_ioperm(struct ucred *cred); 345 int mac_check_system_acct(struct ucred *cred, struct vnode *vp); 346 int mac_check_system_nfsd(struct ucred *cred); 347 int mac_check_system_reboot(struct ucred *cred, int howto); 348 int mac_check_system_settime(struct ucred *cred); 349 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 350 int mac_check_system_swapoff(struct ucred *cred, struct vnode *vp); 351 int mac_check_system_sysctl(struct ucred *cred, struct sysctl_oid *oidp, 352 void *arg1, int arg2, struct sysctl_req *req); 353 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 354 int acc_mode); 355 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 356 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 357 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 358 struct componentname *cnp, struct vattr *vap); 359 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 360 struct vnode *vp, struct componentname *cnp); 361 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 362 acl_type_t type); 363 int mac_check_vnode_deleteextattr(struct ucred *cred, struct vnode *vp, 364 int attrnamespace, const char *name); 365 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp, 366 struct image_params *imgp); 367 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 368 acl_type_t type); 369 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 370 int attrnamespace, const char *name, struct uio *uio); 371 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 372 struct vnode *vp, struct componentname *cnp); 373 int mac_check_vnode_listextattr(struct ucred *cred, struct vnode *vp, 374 int attrnamespace); 375 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 376 struct componentname *cnp); 377 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 378 int prot); 379 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 380 int prot); 381 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 382 int acc_mode); 383 int mac_check_vnode_poll(struct ucred *active_cred, 384 struct ucred *file_cred, struct vnode *vp); 385 int mac_check_vnode_read(struct ucred *active_cred, 386 struct ucred *file_cred, struct vnode *vp); 387 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 388 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 389 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 390 struct vnode *vp, struct componentname *cnp); 391 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 392 struct vnode *vp, int samedir, struct componentname *cnp); 393 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 394 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 395 acl_type_t type, struct acl *acl); 396 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 397 int attrnamespace, const char *name, struct uio *uio); 398 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 399 u_long flags); 400 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 401 mode_t mode); 402 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 403 uid_t uid, gid_t gid); 404 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 405 struct timespec atime, struct timespec mtime); 406 int mac_check_vnode_stat(struct ucred *active_cred, 407 struct ucred *file_cred, struct vnode *vp); 408 int mac_check_vnode_write(struct ucred *active_cred, 409 struct ucred *file_cred, struct vnode *vp); 410 int mac_getsockopt_label(struct ucred *cred, struct socket *so, 411 struct mac *extmac); 412 int mac_getsockopt_peerlabel(struct ucred *cred, struct socket *so, 413 struct mac *extmac); 414 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 415 struct ifnet *ifnet); 416 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 417 struct ifnet *ifnet); 418 int mac_setsockopt_label(struct ucred *cred, struct socket *so, 419 struct mac *extmac); 420 int mac_pipe_label_set(struct ucred *cred, struct pipepair *pp, 421 struct label *label); 422 void mac_cred_mmapped_drop_perms(struct thread *td, struct ucred *cred); 423 424 /* 425 * Calls to help various file systems implement labeling functionality 426 * using their existing EA implementation. 427 */ 428 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 429 430 #endif /* !_KERNEL */ 431 432 #endif /* !_SYS_MAC_H_ */ 433