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 #else /* _KERNEL */ 110 111 /* 112 * Kernel functions to manage and evaluate labels. 113 */ 114 struct bpf_d; 115 struct componentname; 116 struct devfs_dirent; 117 struct ifnet; 118 struct ifreq; 119 struct ipq; 120 struct mbuf; 121 struct mount; 122 struct proc; 123 struct sockaddr; 124 struct socket; 125 struct pipe; 126 struct thread; 127 struct timespec; 128 struct ucred; 129 struct uio; 130 struct vattr; 131 struct vnode; 132 133 #include <sys/acl.h> /* XXX acl_type_t */ 134 135 struct vop_refreshlabel_args; 136 struct vop_setlabel_args; 137 138 /* 139 * Label operations. 140 */ 141 void mac_init_bpfdesc(struct bpf_d *); 142 void mac_init_cred(struct ucred *); 143 void mac_init_devfsdirent(struct devfs_dirent *); 144 void mac_init_ifnet(struct ifnet *); 145 void mac_init_ipq(struct ipq *); 146 int mac_init_socket(struct socket *, int flag); 147 void mac_init_pipe(struct pipe *); 148 int mac_init_mbuf(struct mbuf *m, int flag); 149 void mac_init_mount(struct mount *); 150 void mac_init_vnode(struct vnode *); 151 void mac_init_vnode_label(struct label *); 152 void mac_copy_vnode_label(struct label *, struct label *label); 153 void mac_destroy_bpfdesc(struct bpf_d *); 154 void mac_destroy_cred(struct ucred *); 155 void mac_destroy_devfsdirent(struct devfs_dirent *); 156 void mac_destroy_ifnet(struct ifnet *); 157 void mac_destroy_ipq(struct ipq *); 158 void mac_destroy_socket(struct socket *); 159 void mac_destroy_pipe(struct pipe *); 160 void mac_destroy_mbuf(struct mbuf *); 161 void mac_destroy_mount(struct mount *); 162 void mac_destroy_vnode(struct vnode *); 163 void mac_destroy_vnode_label(struct label *); 164 165 /* 166 * Labeling event operations: file system objects, and things that 167 * look a lot like file system objects. 168 */ 169 void mac_associate_vnode_devfs(struct mount *mp, struct devfs_dirent *de, 170 struct vnode *vp); 171 int mac_associate_vnode_extattr(struct mount *mp, struct vnode *vp); 172 void mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp); 173 void mac_create_devfs_device(dev_t dev, struct devfs_dirent *de); 174 void mac_create_devfs_directory(char *dirname, int dirnamelen, 175 struct devfs_dirent *de); 176 void mac_create_devfs_symlink(struct ucred *cred, struct devfs_dirent *dd, 177 struct devfs_dirent *de); 178 void mac_create_devfs_vnode(struct devfs_dirent *de, struct vnode *vp); 179 int mac_create_vnode_extattr(struct ucred *cred, struct mount *mp, 180 struct vnode *dvp, struct vnode *vp, struct componentname *cnp); 181 void mac_create_mount(struct ucred *cred, struct mount *mp); 182 void mac_create_root_mount(struct ucred *cred, struct mount *mp); 183 void mac_relabel_vnode(struct ucred *cred, struct vnode *vp, 184 struct label *newlabel); 185 void mac_update_devfsdirent(struct devfs_dirent *de, struct vnode *vp); 186 187 /* 188 * Labeling event operations: IPC objects. 189 */ 190 void mac_create_mbuf_from_socket(struct socket *so, struct mbuf *m); 191 void mac_create_socket(struct ucred *cred, struct socket *socket); 192 void mac_create_socket_from_socket(struct socket *oldsocket, 193 struct socket *newsocket); 194 void mac_set_socket_peer_from_mbuf(struct mbuf *mbuf, 195 struct socket *socket); 196 void mac_set_socket_peer_from_socket(struct socket *oldsocket, 197 struct socket *newsocket); 198 void mac_create_pipe(struct ucred *cred, struct pipe *pipe); 199 200 /* 201 * Labeling event operations: network objects. 202 */ 203 void mac_create_bpfdesc(struct ucred *cred, struct bpf_d *bpf_d); 204 void mac_create_ifnet(struct ifnet *ifp); 205 void mac_create_ipq(struct mbuf *fragment, struct ipq *ipq); 206 void mac_create_datagram_from_ipq(struct ipq *ipq, struct mbuf *datagram); 207 void mac_create_fragment(struct mbuf *datagram, struct mbuf *fragment); 208 void mac_create_mbuf_from_mbuf(struct mbuf *oldmbuf, struct mbuf *newmbuf); 209 void mac_create_mbuf_linklayer(struct ifnet *ifnet, struct mbuf *m); 210 void mac_create_mbuf_from_bpfdesc(struct bpf_d *bpf_d, struct mbuf *m); 211 void mac_create_mbuf_from_ifnet(struct ifnet *ifnet, struct mbuf *m); 212 void mac_create_mbuf_multicast_encap(struct mbuf *oldmbuf, 213 struct ifnet *ifnet, struct mbuf *newmbuf); 214 void mac_create_mbuf_netlayer(struct mbuf *oldmbuf, struct mbuf *newmbuf); 215 int mac_fragment_match(struct mbuf *fragment, struct ipq *ipq); 216 void mac_update_ipq(struct mbuf *fragment, struct ipq *ipq); 217 218 /* 219 * Labeling event operations: processes. 220 */ 221 void mac_create_cred(struct ucred *cred_parent, struct ucred *cred_child); 222 void mac_execve_transition(struct ucred *old, struct ucred *new, 223 struct vnode *vp); 224 int mac_execve_will_transition(struct ucred *old, struct vnode *vp); 225 void mac_create_proc0(struct ucred *cred); 226 void mac_create_proc1(struct ucred *cred); 227 void mac_thread_userret(struct thread *td); 228 229 /* Access control checks. */ 230 int mac_check_bpfdesc_receive(struct bpf_d *bpf_d, struct ifnet *ifnet); 231 int mac_check_cred_visible(struct ucred *u1, struct ucred *u2); 232 int mac_check_ifnet_transmit(struct ifnet *ifnet, struct mbuf *m); 233 int mac_check_mount_stat(struct ucred *cred, struct mount *mp); 234 int mac_check_pipe_ioctl(struct ucred *cred, struct pipe *pipe, 235 unsigned long cmd, void *data); 236 int mac_check_pipe_poll(struct ucred *cred, struct pipe *pipe); 237 int mac_check_pipe_read(struct ucred *cred, struct pipe *pipe); 238 int mac_check_pipe_stat(struct ucred *cred, struct pipe *pipe); 239 int mac_check_pipe_write(struct ucred *cred, struct pipe *pipe); 240 int mac_check_proc_debug(struct ucred *cred, struct proc *proc); 241 int mac_check_proc_sched(struct ucred *cred, struct proc *proc); 242 int mac_check_proc_signal(struct ucred *cred, struct proc *proc, 243 int signum); 244 int mac_check_socket_bind(struct ucred *cred, struct socket *so, 245 struct sockaddr *sockaddr); 246 int mac_check_socket_connect(struct ucred *cred, struct socket *so, 247 struct sockaddr *sockaddr); 248 int mac_check_socket_deliver(struct socket *so, struct mbuf *m); 249 int mac_check_socket_listen(struct ucred *cred, struct socket *so); 250 int mac_check_socket_receive(struct ucred *cred, struct socket *so); 251 int mac_check_socket_send(struct ucred *cred, struct socket *so); 252 int mac_check_socket_visible(struct ucred *cred, struct socket *so); 253 int mac_check_system_reboot(struct ucred *cred, int howto); 254 int mac_check_system_swapon(struct ucred *cred, struct vnode *vp); 255 int mac_check_system_sysctl(struct ucred *cred, int *name, 256 u_int namelen, void *old, size_t *oldlenp, int inkernel, 257 void *new, size_t newlen); 258 int mac_check_vnode_access(struct ucred *cred, struct vnode *vp, 259 int acc_mode); 260 int mac_check_vnode_chdir(struct ucred *cred, struct vnode *dvp); 261 int mac_check_vnode_chroot(struct ucred *cred, struct vnode *dvp); 262 int mac_check_vnode_create(struct ucred *cred, struct vnode *dvp, 263 struct componentname *cnp, struct vattr *vap); 264 int mac_check_vnode_delete(struct ucred *cred, struct vnode *dvp, 265 struct vnode *vp, struct componentname *cnp); 266 int mac_check_vnode_deleteacl(struct ucred *cred, struct vnode *vp, 267 acl_type_t type); 268 int mac_check_vnode_exec(struct ucred *cred, struct vnode *vp); 269 int mac_check_vnode_getacl(struct ucred *cred, struct vnode *vp, 270 acl_type_t type); 271 int mac_check_vnode_getextattr(struct ucred *cred, struct vnode *vp, 272 int attrnamespace, const char *name, struct uio *uio); 273 int mac_check_vnode_link(struct ucred *cred, struct vnode *dvp, 274 struct vnode *vp, struct componentname *cnp); 275 int mac_check_vnode_lookup(struct ucred *cred, struct vnode *dvp, 276 struct componentname *cnp); 277 int mac_check_vnode_mmap(struct ucred *cred, struct vnode *vp, 278 int prot); 279 int mac_check_vnode_mprotect(struct ucred *cred, struct vnode *vp, 280 int prot); 281 int mac_check_vnode_open(struct ucred *cred, struct vnode *vp, 282 int acc_mode); 283 int mac_check_vnode_poll(struct ucred *active_cred, 284 struct ucred *file_cred, struct vnode *vp); 285 int mac_check_vnode_read(struct ucred *active_cred, 286 struct ucred *file_cred, struct vnode *vp); 287 int mac_check_vnode_readdir(struct ucred *cred, struct vnode *vp); 288 int mac_check_vnode_readlink(struct ucred *cred, struct vnode *vp); 289 int mac_check_vnode_rename_from(struct ucred *cred, struct vnode *dvp, 290 struct vnode *vp, struct componentname *cnp); 291 int mac_check_vnode_rename_to(struct ucred *cred, struct vnode *dvp, 292 struct vnode *vp, int samedir, struct componentname *cnp); 293 int mac_check_vnode_revoke(struct ucred *cred, struct vnode *vp); 294 int mac_check_vnode_setacl(struct ucred *cred, struct vnode *vp, 295 acl_type_t type, struct acl *acl); 296 int mac_check_vnode_setextattr(struct ucred *cred, struct vnode *vp, 297 int attrnamespace, const char *name, struct uio *uio); 298 int mac_check_vnode_setflags(struct ucred *cred, struct vnode *vp, 299 u_long flags); 300 int mac_check_vnode_setmode(struct ucred *cred, struct vnode *vp, 301 mode_t mode); 302 int mac_check_vnode_setowner(struct ucred *cred, struct vnode *vp, 303 uid_t uid, gid_t gid); 304 int mac_check_vnode_setutimes(struct ucred *cred, struct vnode *vp, 305 struct timespec atime, struct timespec mtime); 306 int mac_check_vnode_stat(struct ucred *active_cred, 307 struct ucred *file_cred, struct vnode *vp); 308 int mac_check_vnode_write(struct ucred *active_cred, 309 struct ucred *file_cred, struct vnode *vp); 310 int mac_getsockopt_label_get(struct ucred *cred, struct socket *so, 311 struct mac *extmac); 312 int mac_getsockopt_peerlabel_get(struct ucred *cred, struct socket *so, 313 struct mac *extmac); 314 int mac_ioctl_ifnet_get(struct ucred *cred, struct ifreq *ifr, 315 struct ifnet *ifnet); 316 int mac_ioctl_ifnet_set(struct ucred *cred, struct ifreq *ifr, 317 struct ifnet *ifnet); 318 int mac_setsockopt_label_set(struct ucred *cred, struct socket *so, 319 struct mac *extmac); 320 int mac_pipe_label_set(struct ucred *cred, struct pipe *pipe, 321 struct label *label); 322 323 /* 324 * Calls to help various file systems implement labeling functionality 325 * using their existing EA implementation. 326 */ 327 int vop_stdsetlabel_ea(struct vop_setlabel_args *ap); 328 329 #endif /* !_KERNEL */ 330 331 #endif /* !_SYS_MAC_H */ 332