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 * XXXMAC: Per-policy structures will be moved from mac.h to per-policy 64 * include files once the revised user interface is available. 65 */ 66 67 /* 68 * Structures and constants associated with a Biba Integrity policy. 69 * mac_biba represents a Biba label, with mb_type determining its properties, 70 * and mb_grade represents the hierarchal grade if valid for the current 71 * mb_type. These structures will move to mac_biba.h once we have dymamic 72 * labels exposed to userland. 73 */ 74 struct mac_biba_element { 75 u_short mbe_type; 76 u_short mbe_grade; 77 }; 78 79 /* 80 * Biba labels consist of two components: a single label, and a label 81 * range. Depending on the context, one or both may be used; the mb_flags 82 * field permits the provider to indicate what fields are intended for 83 * use. 84 */ 85 struct mac_biba { 86 int mb_flags; 87 struct mac_biba_element mb_single; 88 struct mac_biba_element mb_rangelow, mb_rangehigh; 89 }; 90 91 /* 92 * Structures and constants associated with a Multi-Level Security policy. 93 * mac_mls represents an MLS label, with mm_type determining its properties, 94 * and mm_level represents the hierarchal sensitivity level if valid for the 95 * current mm_type. These structures will move to mac_mls.h once we have 96 * dynamic labels exposed to userland. 97 */ 98 struct mac_mls_element { 99 u_short mme_type; 100 u_short mme_level; 101 }; 102 103 /* 104 * MLS labels consist of two components: a single label, and a label 105 * range. Depending on the context, one or both may be used; the mb_flags 106 * field permits the provider to indicate what fields are intended for 107 * use. 108 */ 109 struct mac_mls { 110 int mm_flags; 111 struct mac_mls_element mm_single; 112 struct mac_mls_element mm_rangelow, mm_rangehigh; 113 }; 114 115 /* 116 * Structures and constants associated with a Type Enforcement policy. 117 * mac_te represents a Type Enforcement label. 118 */ 119 #define MAC_TE_TYPE_MAXLEN 32 120 struct mac_te { 121 char mt_type[MAC_TE_TYPE_MAXLEN+1]; /* TE type */ 122 }; 123 124 struct mac_sebsd { 125 uint32_t ms_psid; /* persistent sid storage */ 126 }; 127 128 /* 129 * Composite structures and constants which combine the various policy 130 * elements into common structures to be associated with subjects and 131 * objects. 132 */ 133 struct mac { 134 int m_macflags; 135 struct mac_biba m_biba; 136 struct mac_mls m_mls; 137 struct mac_te m_te; 138 struct mac_sebsd m_sebsd; 139 }; 140 typedef struct mac *mac_t; 141 142 #define MAC_FLAG_INITIALIZED 0x00000001 /* Is initialized. */ 143 144 #ifndef _KERNEL 145 146 /* 147 * POSIX.1e functions visible in the application namespace. 148 */ 149 int mac_dominate(const mac_t _labela, const mac_t _labelb); 150 int mac_equal(const mac_t labela, const mac_t _labelb); 151 int mac_free(void *_buf_p); 152 mac_t mac_from_text(const char *_text_p); 153 mac_t mac_get_fd(int _fildes); 154 mac_t mac_get_file(const char *_path_p); 155 mac_t mac_get_proc(void); 156 mac_t mac_glb(const mac_t _labela, const mac_t _labelb); 157 mac_t mac_lub(const mac_t _labela, const mac_t _labelb); 158 int mac_set_fd(int _fildes, const mac_t _label); 159 int mac_set_file(const char *_path_p, mac_t _label); 160 int mac_set_proc(const mac_t _label); 161 ssize_t mac_size(mac_t _label); 162 char * mac_to_text(const mac_t _label, size_t *_len_p); 163 int mac_valid(const mac_t _label); 164 165 /* 166 * Extensions to POSIX.1e visible in the application namespace. 167 */ 168 int mac_is_present_np(const char *_policyname); 169 int mac_policy(const char *_policyname, int call, void *arg); 170 171 /* 172 * System calls wrapped by some POSIX.1e functions. 173 */ 174 int __mac_get_fd(int _fd, struct mac *_mac_p); 175 int __mac_get_file(const char *_path_p, struct mac *_mac_p); 176 int __mac_get_proc(struct mac *_mac_p); 177 int __mac_set_fd(int fd, struct mac *_mac_p); 178 int __mac_set_file(const char *_path_p, struct mac *_mac_p); 179 int __mac_set_proc(struct mac *_mac_p); 180 181 #else /* _KERNEL */ 182 183 /* 184 * MAC entry point operations 185 */ 186 enum mac_ep_ops { 187 MAC_OP_VNODE_READ, 188 MAC_OP_VNODE_WRITE, 189 MAC_OP_VNODE_POLL, 190 MAC_OP_PIPE_READ, 191 MAC_OP_PIPE_WRITE, 192 MAC_OP_PIPE_STAT, 193 MAC_OP_PIPE_POLL 194 }; 195 196 /* 197 * Kernel functions to manage and evaluate labels. 198 */ 199 struct bpf_d; 200 struct componentname; 201 struct devfs_dirent; 202 struct ifnet; 203 struct ifreq; 204 struct ipq; 205 struct mbuf; 206 struct mount; 207 struct proc; 208 struct sockaddr; 209 struct socket; 210 struct pipe; 211 struct timespec; 212 struct ucred; 213 struct uio; 214 struct vattr; 215 struct vnode; 216 217 #include <sys/acl.h> /* XXX acl_type_t */ 218 219 struct vop_refreshlabel_args; 220 struct vop_setlabel_args; 221 222 /* 223 * Label operations. 224 */ 225 void mac_init_bpfdesc(struct bpf_d *); 226 void mac_init_cred(struct ucred *); 227 void mac_init_devfsdirent(struct devfs_dirent *); 228 void mac_init_ifnet(struct ifnet *); 229 void mac_init_ipq(struct ipq *); 230 void mac_init_socket(struct socket *); 231 void mac_init_pipe(struct pipe *); 232 int mac_init_mbuf(struct mbuf *m, int how); 233 void mac_init_mount(struct mount *); 234 void mac_init_vnode(struct vnode *); 235 void mac_destroy_bpfdesc(struct bpf_d *); 236 void mac_destroy_cred(struct ucred *); 237 void mac_destroy_devfsdirent(struct devfs_dirent *); 238 void mac_destroy_ifnet(struct ifnet *); 239 void mac_destroy_ipq(struct ipq *); 240 void mac_destroy_socket(struct socket *); 241 void mac_destroy_pipe(struct pipe *); 242 void mac_destroy_mbuf(struct mbuf *); 243 void mac_destroy_mount(struct mount *); 244 void mac_destroy_vnode(struct vnode *); 245 246 /* 247 * Labeling event operations: file system objects, and things that 248 * look a lot like file system objects. 249 */ 250 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 251 void mac_create_devfs_directory(char *dirname, int dirnamelen, 252 struct devfs_dirent *de); 253 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 254 void mac_create_vnode(struct ucred *cred, struct vnode *parent, 255 struct vnode *child); 256 void mac_create_mount(struct ucred *cred, struct mount *mp); 257 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 258 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 259 struct label *newlabel); 260 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 261 void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred); 262 void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp); 263 264 /* 265 * Labeling event operations: IPC objects. 266 */ 267 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 268 void mac_create_socket(struct ucred *cred, struct socket *socket); 269 void mac_create_socket_from_socket(struct socket *oldsocket, 270 struct socket *newsocket); 271 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 272 struct socket *socket); 273 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 274 struct socket *newsocket); 275 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 276 277 /* 278 * Labeling event operations: network objects. 279 */ 280 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 281 void mac_create_ifnet(struct ifnet *ifp); 282 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 283 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 284 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 285 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 286 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 287 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 288 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 289 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 290 struct ifnet *ifnet, struct mbuf *newmbuf); 291 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 292 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 293 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 294 295 /* 296 * Labeling event operations: processes. 297 */ 298 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 299 void mac_execve_transition(struct ucred *old, struct ucred *new, 300 struct vnode *vp); 301 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 302 void mac_create_proc0(struct ucred *cred); 303 void mac_create_proc1(struct ucred *cred); 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_op(struct ucred *cred, struct pipe *pipe, int op); 311 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 312 unsigned long cmd, void *data); 313 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 314 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 315 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 316 int signum); 317 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 318 struct sockaddr *sockaddr); 319 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 320 struct sockaddr *sockaddr); 321 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 322 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 323 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 324 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 325 int flags); 326 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 327 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 328 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 329 struct componentname *cnp, struct vattr *vap); 330 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 331 struct vnode *vp, struct componentname *cnp); 332 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 333 acl_type_t type); 334 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 335 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 336 acl_type_t type); 337 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 338 int attrnamespace, const char *name, struct uio *uio); 339 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 340 struct componentname *cnp); 341 /* XXX This u_char should be vm_prot_t! */ 342 u_char mac_check_vnode_mmap_prot(struct ucred *cred, struct vnode *vp, 343 int newmapping); 344 int mac_check_vnode_op(struct ucred *cred, struct vnode *vp, int op); 345 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 346 mode_t acc_mode); 347 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 348 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 349 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 350 struct vnode *vp, struct componentname *cnp); 351 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 352 struct vnode *vp, int samedir, struct componentname *cnp); 353 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 354 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 355 acl_type_t type, struct acl *acl); 356 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 357 int attrnamespace, const char *name, struct uio *uio); 358 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 359 u_long flags); 360 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 361 mode_t mode); 362 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 363 uid_t uid, gid_t gid); 364 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 365 struct timespec atime, struct timespec mtime); 366 int mac_check_vnode_stat(struct ucred *cred, struct vnode *vp); 367 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 368 struct mac *extmac); 369 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 370 struct mac *extmac); 371 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 372 struct ifnet *ifnet); 373 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 374 struct ifnet *ifnet); 375 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 376 struct mac *extmac); 377 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 378 struct label *label); 379 380 /* 381 * Calls to help various file systems implement labeling functionality 382 * using their existing EA implementation. 383 */ 384 int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp, 385 struct ucred *cred); 386 int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap); 387 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 388 389 #endif /* _KERNEL */ 390 391 #endif /* !_SYS_MAC_H */ 392