projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 2d21ac55 A |
1 | /*- |
| 2 | * Copyright (c) 2004 Networks Associates Technology, Inc. | |
| 3 | * Copyright (c) 2005 SPARTA, Inc. | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * This software was developed for the FreeBSD Project in part by Network | |
| 7 | * Associates Laboratories, the Security Research Division of Network | |
| 8 | * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), | |
| 9 | * as part of the DARPA CHATS research program. | |
| 10 | * | |
| 11 | * Redistribution and use in source and binary forms, with or without | |
| 12 | * modification, are permitted provided that the following conditions | |
| 13 | * are met: | |
| 14 | * 1. Redistributions of source code must retain the above copyright | |
| 15 | * notice, this list of conditions and the following disclaimer. | |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 17 | * notice, this list of conditions and the following disclaimer in the | |
| 18 | * documentation and/or other materials provided with the distribution. | |
| 19 | * | |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | */ | |
| 32 | ||
| 33 | #include <kern/zalloc.h> | |
| 34 | #include <security/_label.h> | |
| 35 | #include <sys/param.h> | |
| 36 | #include <sys/queue.h> | |
| 37 | #include <sys/systm.h> | |
| 38 | #include <security/mac_internal.h> | |
| 39 | ||
| f427ee49 | 40 | static ZONE_DECLARE(zone_label, "MAC Labels", sizeof(struct label), ZC_ZFREE_CLEARMEM); |
| 2d21ac55 A |
41 | |
| 42 | struct label * | |
| 43 | mac_labelzone_alloc(int flags) | |
| 44 | { | |
| f427ee49 | 45 | int zflags = Z_ZERO | (flags & MAC_NOWAIT); |
| 2d21ac55 A |
46 | struct label *l; |
| 47 | ||
| f427ee49 A |
48 | static_assert(MAC_NOWAIT == Z_NOWAIT); |
| 49 | l = zalloc_flags(zone_label, zflags); | |
| 50 | if (l) { | |
| 51 | l->l_flags = MAC_FLAG_INITIALIZED; | |
| 0a7de745 | 52 | } |
| 0a7de745 | 53 | return l; |
| 2d21ac55 A |
54 | } |
| 55 | ||
| 56 | void | |
| 57 | mac_labelzone_free(struct label *l) | |
| 58 | { | |
| 0a7de745 | 59 | if (l == NULL) { |
| 2d21ac55 | 60 | panic("Free of NULL MAC label\n"); |
| 0a7de745 | 61 | } |
| 2d21ac55 | 62 | |
| 0a7de745 | 63 | if ((l->l_flags & MAC_FLAG_INITIALIZED) == 0) { |
| 2d21ac55 | 64 | panic("Free of uninitialized label\n"); |
| 0a7de745 | 65 | } |
| 2d21ac55 A |
66 | bzero(l, sizeof(struct label)); |
| 67 | zfree(zone_label, l); | |
| 68 | } | |
| b0d623f7 A |
69 | |
| 70 | /* | |
| 71 | * Functions used by policy modules to get and set label values. | |
| 72 | */ | |
| 73 | intptr_t | |
| 74 | mac_label_get(struct label *l, int slot) | |
| 75 | { | |
| 76 | KASSERT(l != NULL, ("mac_label_get: NULL label")); | |
| 77 | ||
| 0a7de745 | 78 | return (intptr_t) (l->l_perpolicy[slot].l_ptr); |
| b0d623f7 A |
79 | } |
| 80 | ||
| 81 | void | |
| 82 | mac_label_set(struct label *l, int slot, intptr_t v) | |
| 83 | { | |
| 84 | KASSERT(l != NULL, ("mac_label_set: NULL label")); | |
| 85 | ||
| 86 | l->l_perpolicy[slot].l_ptr = (void *) v; | |
| 87 | } |