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 * Kernel functions to manage and evaluate labels. 185 */ 186 struct bpf_d; 187 struct componentname; 188 struct devfs_dirent; 189 struct ifnet; 190 struct ifreq; 191 struct ipq; 192 struct mbuf; 193 struct mount; 194 struct proc; 195 struct sockaddr; 196 struct socket; 197 struct pipe; 198 struct timespec; 199 struct ucred; 200 struct uio; 201 struct vattr; 202 struct vnode; 203 204 #include <sys/acl.h> /* XXX acl_type_t */ 205 206 struct vop_refreshlabel_args; 207 struct vop_setlabel_args; 208 209 /* 210 * Label operations. 211 */ 212 void mac_init_bpfdesc(struct bpf_d *); 213 void mac_init_cred(struct ucred *); 214 void mac_init_devfsdirent(struct devfs_dirent *); 215 void mac_init_ifnet(struct ifnet *); 216 void mac_init_ipq(struct ipq *); 217 void mac_init_socket(struct socket *); 218 void mac_init_pipe(struct pipe *); 219 int mac_init_mbuf(struct mbuf *m, int how); 220 void mac_init_mount(struct mount *); 221 void mac_init_vnode(struct vnode *); 222 void mac_destroy_bpfdesc(struct bpf_d *); 223 void mac_destroy_cred(struct ucred *); 224 void mac_destroy_devfsdirent(struct devfs_dirent *); 225 void mac_destroy_ifnet(struct ifnet *); 226 void mac_destroy_ipq(struct ipq *); 227 void mac_destroy_socket(struct socket *); 228 void mac_destroy_pipe(struct pipe *); 229 void mac_destroy_mbuf(struct mbuf *); 230 void mac_destroy_mount(struct mount *); 231 void mac_destroy_vnode(struct vnode *); 232 233 /* 234 * Labeling event operations: file system objects, and things that 235 * look a lot like file system objects. 236 */ 237 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 238 void mac_create_devfs_directory(char *dirname, int dirnamelen, 239 struct devfs_dirent *de); 240 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 241 void mac_create_vnode(struct ucred *cred, struct vnode *parent, 242 struct vnode *child); 243 void mac_create_mount(struct ucred *cred, struct mount *mp); 244 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 245 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 246 struct label *newlabel); 247 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 248 void mac_update_procfsvnode(struct vnode *vp, struct ucred *cred); 249 void mac_update_vnode_from_mount(struct vnode *vp, struct mount *mp); 250 251 /* 252 * Labeling event operations: IPC objects. 253 */ 254 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 255 void mac_create_socket(struct ucred *cred, struct socket *socket); 256 void mac_create_socket_from_socket(struct socket *oldsocket, 257 struct socket *newsocket); 258 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 259 struct socket *socket); 260 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 261 struct socket *newsocket); 262 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 263 264 /* 265 * Labeling event operations: network objects. 266 */ 267 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 268 void mac_create_ifnet(struct ifnet *ifp); 269 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 270 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 271 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 272 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 273 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 274 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 275 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 276 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 277 struct ifnet *ifnet, struct mbuf *newmbuf); 278 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 279 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 280 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 281 282 /* 283 * Labeling event operations: processes. 284 */ 285 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 286 void mac_execve_transition(struct ucred *old, struct ucred *new, 287 struct vnode *vp); 288 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 289 void mac_create_proc0(struct ucred *cred); 290 void mac_create_proc1(struct ucred *cred); 291 292 /* Access control checks. */ 293 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 294 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 295 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 296 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 297 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 298 unsigned long cmd, void *data); 299 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 300 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 301 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 302 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 303 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 304 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 305 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 306 int signum); 307 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 308 struct sockaddr *sockaddr); 309 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 310 struct sockaddr *sockaddr); 311 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 312 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 313 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 314 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 315 int flags); 316 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 317 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 318 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 319 struct componentname *cnp, struct vattr *vap); 320 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 321 struct vnode *vp, struct componentname *cnp); 322 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 323 acl_type_t type); 324 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 325 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 326 acl_type_t type); 327 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 328 int attrnamespace, const char *name, struct uio *uio); 329 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 330 struct componentname *cnp); 331 /* XXX This u_char should be vm_prot_t! */ 332 u_char mac_check_vnode_mmap_prot(struct ucred *cred, struct vnode *vp, 333 int newmapping); 334 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 335 mode_t acc_mode); 336 int mac_check_vnode_poll(struct ucred *cred, struct vnode *vp); 337 int mac_check_vnode_read(struct ucred *cred, struct vnode *vp); 338 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 339 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 340 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 341 struct vnode *vp, struct componentname *cnp); 342 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 343 struct vnode *vp, int samedir, struct componentname *cnp); 344 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 345 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 346 acl_type_t type, struct acl *acl); 347 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 348 int attrnamespace, const char *name, struct uio *uio); 349 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 350 u_long flags); 351 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 352 mode_t mode); 353 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 354 uid_t uid, gid_t gid); 355 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 356 struct timespec atime, struct timespec mtime); 357 int mac_check_vnode_stat(struct ucred *cred, struct vnode *vp); 358 int mac_check_vnode_write(struct ucred *cred, struct vnode *vp); 359 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 360 struct mac *extmac); 361 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 362 struct mac *extmac); 363 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 364 struct ifnet *ifnet); 365 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 366 struct ifnet *ifnet); 367 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 368 struct mac *extmac); 369 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 370 struct label *label); 371 372 /* 373 * Calls to help various file systems implement labeling functionality 374 * using their existing EA implementation. 375 */ 376 int vop_stdcreatevnode_ea(struct vnode *dvp, struct vnode *tvp, 377 struct ucred *cred); 378 int vop_stdrefreshlabel_ea(struct vop_refreshlabel_args *ap); 379 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 380 381 #endif /* _KERNEL */ 382 383 #endif /* !_SYS_MAC_H */ 384