2 * Copyright (c) 1999-2002 Robert N. M. Watson
3 * Copyright (c) 2001-2002 Networks Associates Technology, Inc.
6 * This software was developed by Robert Watson for the TrustedBSD Project.
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.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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.
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
38 * Developed by the TrustedBSD Project.
39 * Experiment with a partition-like model.
42 #include <sys/types.h>
43 #include <sys/param.h>
45 #include <sys/kernel.h>
47 #include <sys/mount.h>
50 #include <sys/systm.h>
51 #include <sys/sysproto.h>
52 #include <sys/sysent.h>
53 #include <sys/vnode.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/sysctl.h>
59 #include <fs/devfs/devfs.h>
61 #include <net/bpfdesc.h>
63 #include <net/if_types.h>
64 #include <net/if_var.h>
68 #include <sys/mac_policy.h>
70 #include <security/mac_partition/mac_partition.h>
72 SYSCTL_DECL(_security_mac);
74 SYSCTL_NODE(_security_mac, OID_AUTO, partition, CTLFLAG_RW, 0,
75 "TrustedBSD mac_partition policy controls");
77 static int mac_partition_enabled = 1;
78 SYSCTL_INT(_security_mac_partition, OID_AUTO, enabled, CTLFLAG_RW,
79 &mac_partition_enabled, 0, "Enforce partition policy");
81 static int partition_slot;
82 #define SLOT(l) (LABEL_TO_SLOT((l), partition_slot).l_long)
85 mac_partition_init(struct mac_policy_conf *conf)
91 mac_partition_init_label(struct label *label)
98 mac_partition_destroy_label(struct label *label)
105 mac_partition_copy_label(struct label *src, struct label *dest)
108 SLOT(dest) = SLOT(src);
112 mac_partition_externalize_label(struct label *label, char *element_name,
113 struct sbuf *sb, int *claimed)
116 if (strcmp(MAC_PARTITION_LABEL_NAME, element_name) != 0)
121 if (sbuf_printf(sb, "%ld", SLOT(label)) == -1)
128 mac_partition_internalize_label(struct label *label, char *element_name,
129 char *element_data, int *claimed)
132 if (strcmp(MAC_PARTITION_LABEL_NAME, element_name) != 0)
136 SLOT(label) = strtol(element_data, NULL, 10);
141 mac_partition_create_proc0(struct ucred *cred)
144 SLOT(cred->cr_label) = 0;
148 mac_partition_create_proc1(struct ucred *cred)
151 SLOT(cred->cr_label) = 0;
155 mac_partition_relabel_cred(struct ucred *cred, struct label *newlabel)
158 if (SLOT(newlabel) != 0)
159 SLOT(cred->cr_label) = SLOT(newlabel);
163 label_on_label(struct label *subject, struct label *object)
166 if (mac_partition_enabled == 0)
169 if (SLOT(subject) == 0)
172 if (SLOT(subject) == SLOT(object))
179 mac_partition_check_cred_relabel(struct ucred *cred, struct label *newlabel)
185 /* Treat "0" as a no-op request. */
186 if (SLOT(newlabel) != 0) {
188 * Require BSD privilege in order to change the partition.
189 * Originally we also required that the process not be
190 * in a partition in the first place, but this didn't
191 * interact well with sendmail.
193 error = suser_cred(cred, 0);
200 mac_partition_check_cred_visible(struct ucred *u1, struct ucred *u2)
204 error = label_on_label(u1->cr_label, u2->cr_label);
206 return (error == 0 ? 0 : ESRCH);
210 mac_partition_check_proc_debug(struct ucred *cred, struct proc *proc)
214 error = label_on_label(cred->cr_label, proc->p_ucred->cr_label);
216 return (error ? ESRCH : 0);
220 mac_partition_check_proc_sched(struct ucred *cred, struct proc *proc)
224 error = label_on_label(cred->cr_label, proc->p_ucred->cr_label);
226 return (error ? ESRCH : 0);
230 mac_partition_check_proc_signal(struct ucred *cred, struct proc *proc,
235 error = label_on_label(cred->cr_label, proc->p_ucred->cr_label);
237 return (error ? ESRCH : 0);
241 mac_partition_check_socket_visible(struct ucred *cred, struct socket *socket,
242 struct label *socketlabel)
246 error = label_on_label(cred->cr_label, socketlabel);
248 return (error ? ENOENT : 0);
252 mac_partition_check_vnode_exec(struct ucred *cred, struct vnode *vp,
253 struct label *label, struct image_params *imgp, struct label *execlabel)
256 if (execlabel != NULL) {
258 * We currently don't permit labels to be changed at
259 * exec-time as part of the partition model, so disallow
260 * non-NULL partition label changes in execlabel.
262 if (SLOT(execlabel) != 0)
269 static struct mac_policy_ops mac_partition_ops =
271 .mpo_init = mac_partition_init,
272 .mpo_init_cred_label = mac_partition_init_label,
273 .mpo_destroy_cred_label = mac_partition_destroy_label,
274 .mpo_copy_cred_label = mac_partition_copy_label,
275 .mpo_externalize_cred_label = mac_partition_externalize_label,
276 .mpo_internalize_cred_label = mac_partition_internalize_label,
277 .mpo_create_proc0 = mac_partition_create_proc0,
278 .mpo_create_proc1 = mac_partition_create_proc1,
279 .mpo_relabel_cred = mac_partition_relabel_cred,
280 .mpo_check_cred_relabel = mac_partition_check_cred_relabel,
281 .mpo_check_cred_visible = mac_partition_check_cred_visible,
282 .mpo_check_proc_debug = mac_partition_check_proc_debug,
283 .mpo_check_proc_sched = mac_partition_check_proc_sched,
284 .mpo_check_proc_signal = mac_partition_check_proc_signal,
285 .mpo_check_socket_visible = mac_partition_check_socket_visible,
286 .mpo_check_vnode_exec = mac_partition_check_vnode_exec,
289 MAC_POLICY_SET(&mac_partition_ops, mac_partition, "TrustedBSD MAC/Partition",
290 MPC_LOADTIME_FLAG_UNLOADOK, &partition_slot);