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 #define MAC_MAX_LABEL_ELEMENT_NAME 32 67 #define MAC_MAX_LABEL_ELEMENT_DATA 4096 68 #define MAC_MAX_LABEL_BUF_LEN 8192 69 70 struct mac { 71 size_t m_buflen; 72 char *m_string; 73 }; 74 75 typedef struct mac *mac_t; 76 77 #ifndef _KERNEL 78 79 /* 80 * Location of the userland MAC framework configuration file. mac.conf 81 * binds policy names to shared libraries that understand those policies, 82 * as well as setting defaults for MAC-aware applications. 83 */ 84 #define MAC_CONFFILE "/etc/mac.conf" 85 86 /* 87 * Extended non-POSIX.1e interfaces that offer additional services 88 * available from the userland and kernel MAC frameworks. 89 */ 90 int mac_free(mac_t _label); 91 int mac_from_text(mac_t *_label, const char *_text); 92 int mac_get_fd(int _fd, mac_t _label); 93 int mac_get_file(const char *_path, mac_t _label); 94 int mac_get_link(const char *_path, mac_t _label); 95 int mac_get_pid(pid_t _pid, mac_t _label); 96 int mac_get_proc(mac_t _label); 97 int mac_is_present(const char *_policyname); 98 int mac_prepare(mac_t *_label, char *_elements); 99 int mac_prepare_file_label(mac_t *_label); 100 int mac_prepare_ifnet_label(mac_t *_label); 101 int mac_prepare_process_label(mac_t *_label); 102 int mac_set_fd(int _fildes, const mac_t _label); 103 int mac_set_file(const char *_path, mac_t _label); 104 int mac_set_link(const char *_path, mac_t _label); 105 int mac_set_proc(const mac_t _label); 106 int mac_syscall(const char *_policyname, int _call, void *_arg); 107 int mac_to_text(mac_t mac, char **_text); 108 109 #endif /* !_KERNEL */ 110 111 /* 112 * XXXMAC: For compatibility until the labels on disk are changed. We 113 * will enable the definitions in various policy include files once 114 * these can be disabled. 115 */ 116 117 #define MAC_BIBA_MAX_COMPARTMENTS 256 118 119 struct mac_biba_element { 120 u_short mbe_type; 121 u_short mbe_grade; 122 u_char mbe_compartments[MAC_BIBA_MAX_COMPARTMENTS >> 3]; 123 }; 124 125 struct mac_biba { 126 int mb_flags; 127 struct mac_biba_element mb_single; 128 struct mac_biba_element mb_rangelow, mb_rangehigh; 129 }; 130 131 #define MAC_MLS_MAX_COMPARTMENTS 256 132 133 struct mac_mls_element { 134 u_short mme_type; 135 u_short mme_level; 136 u_char mme_compartments[MAC_MLS_MAX_COMPARTMENTS >> 3]; 137 }; 138 139 struct mac_mls { 140 int mm_flags; 141 struct mac_mls_element mm_single; 142 struct mac_mls_element mm_rangelow, mm_rangehigh; 143 }; 144 145 #define MAC_TE_TYPE_MAXLEN 32 146 struct mac_te { 147 char mt_type[MAC_TE_TYPE_MAXLEN]; 148 }; 149 150 struct mac_sebsd { 151 uint32_t ms_psid; 152 }; 153 154 struct oldmac { 155 int m_macflags; 156 struct mac_biba m_biba; 157 struct mac_mls m_mls; 158 struct mac_te m_te; 159 struct mac_sebsd m_sebsd; 160 }; 161 162 #ifdef _KERNEL 163 164 /* 165 * Kernel functions to manage and evaluate labels. 166 */ 167 struct bpf_d; 168 struct componentname; 169 struct devfs_dirent; 170 struct ifnet; 171 struct ifreq; 172 struct ipq; 173 struct mbuf; 174 struct mount; 175 struct proc; 176 struct sockaddr; 177 struct socket; 178 struct pipe; 179 struct thread; 180 struct timespec; 181 struct ucred; 182 struct uio; 183 struct vattr; 184 struct vnode; 185 186 #include <sys/acl.h> /* XXX acl_type_t */ 187 188 struct vop_refreshlabel_args; 189 struct vop_setlabel_args; 190 191 /* 192 * Label operations. 193 */ 194 void mac_init_bpfdesc(struct bpf_d *); 195 void mac_init_cred(struct ucred *); 196 void mac_init_devfsdirent(struct devfs_dirent *); 197 void mac_init_ifnet(struct ifnet *); 198 void mac_init_ipq(struct ipq *); 199 int mac_init_socket(struct socket *, int flag); 200 void mac_init_pipe(struct pipe *); 201 int mac_init_mbuf(struct mbuf *m, int flag); 202 void mac_init_mount(struct mount *); 203 void mac_init_vnode(struct vnode *); 204 void mac_destroy_bpfdesc(struct bpf_d *); 205 void mac_destroy_cred(struct ucred *); 206 void mac_destroy_devfsdirent(struct devfs_dirent *); 207 void mac_destroy_ifnet(struct ifnet *); 208 void mac_destroy_ipq(struct ipq *); 209 void mac_destroy_socket(struct socket *); 210 void mac_destroy_pipe(struct pipe *); 211 void mac_destroy_mbuf(struct mbuf *); 212 void mac_destroy_mount(struct mount *); 213 void mac_destroy_vnode(struct vnode *); 214 215 /* 216 * Labeling event operations: file system objects, and things that 217 * look a lot like file system objects. 218 */ 219 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 220 void mac_create_devfs_directory(char *dirname, int dirnamelen, 221 struct devfs_dirent *de); 222 void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd, 223 struct devfs_dirent *de); 224 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 225 void mac_create_vnode(struct ucred *cred, struct vnode *parent, 226 struct vnode *child); 227 void mac_create_mount(struct ucred *cred, struct mount *mp); 228 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 229 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 230 struct label *newlabel); 231 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 232 void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred); 233 void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp); 234 235 /* 236 * Labeling event operations: IPC objects. 237 */ 238 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 239 void mac_create_socket(struct ucred *cred, struct socket *socket); 240 void mac_create_socket_from_socket(struct socket *oldsocket, 241 struct socket *newsocket); 242 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 243 struct socket *socket); 244 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 245 struct socket *newsocket); 246 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 247 248 /* 249 * Labeling event operations: network objects. 250 */ 251 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 252 void mac_create_ifnet(struct ifnet *ifp); 253 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 254 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 255 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 256 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 257 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 258 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 259 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 260 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 261 struct ifnet *ifnet, struct mbuf *newmbuf); 262 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 263 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 264 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 265 266 /* 267 * Labeling event operations: processes. 268 */ 269 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 270 void mac_execve_transition(struct ucred *old, struct ucred *new, 271 struct vnode *vp); 272 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 273 void mac_create_proc0(struct ucred *cred); 274 void mac_create_proc1(struct ucred *cred); 275 void mac_thread_userret(struct thread *td); 276 277 /* Access control checks. */ 278 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 279 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 280 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 281 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 282 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 283 unsigned long cmd, void *data); 284 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 285 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 286 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 287 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 288 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 289 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 290 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 291 int signum); 292 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 293 struct sockaddr *sockaddr); 294 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 295 struct sockaddr *sockaddr); 296 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 297 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 298 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 299 int mac_check_socket_send(struct ucred *cred, struct socket *so); 300 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 301 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 302 int flags); 303 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 304 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 305 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 306 struct componentname *cnp, struct vattr *vap); 307 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 308 struct vnode *vp, struct componentname *cnp); 309 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 310 acl_type_t type); 311 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 312 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 313 acl_type_t type); 314 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 315 int attrnamespace, const char *name, struct uio *uio); 316 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 317 struct vnode *vp, struct componentname *cnp); 318 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 319 struct componentname *cnp); 320 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 321 int prot); 322 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 323 int prot); 324 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 325 mode_t acc_mode); 326 int mac_check_vnode_poll(struct ucred *active_cred, 327 struct ucred *file_cred, struct vnode *vp); 328 int mac_check_vnode_read(struct ucred *active_cred, 329 struct ucred *file_cred, struct vnode *vp); 330 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 331 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 332 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 333 struct vnode *vp, struct componentname *cnp); 334 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 335 struct vnode *vp, int samedir, struct componentname *cnp); 336 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 337 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 338 acl_type_t type, struct acl *acl); 339 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 340 int attrnamespace, const char *name, struct uio *uio); 341 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 342 u_long flags); 343 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 344 mode_t mode); 345 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 346 uid_t uid, gid_t gid); 347 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 348 struct timespec atime, struct timespec mtime); 349 int mac_check_vnode_stat(struct ucred *active_cred, 350 struct ucred *file_cred, struct vnode *vp); 351 int mac_check_vnode_write(struct ucred *active_cred, 352 struct ucred *file_cred, struct vnode *vp); 353 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 354 struct mac *extmac); 355 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 356 struct mac *extmac); 357 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 358 struct ifnet *ifnet); 359 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 360 struct ifnet *ifnet); 361 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 362 struct mac *extmac); 363 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 364 struct label *label); 365 366 /* 367 * Calls to help various file systems implement labeling functionality 368 * using their existing EA implementation. 369 */ 370 int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp, 371 struct ucred *cred); 372 int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap); 373 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 374 375 #endif /* _KERNEL */ 376 377 #endif /* !_SYS_MAC_H */ 378