sandbox-darwin.c revision 323134 
1/*
2 * Copyright (c) 2011 Damien Miller <djm@mindrot.org>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "includes.h"
18
19#ifdef SANDBOX_DARWIN
20
21#include <sys/types.h>
22
23#include <sandbox.h>
24
25#include <errno.h>
26#include <stdarg.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31
32#include "log.h"
33#include "sandbox.h"
34#include "monitor.h"
35#include "xmalloc.h"
36
37/* Darwin/OS X sandbox */
38
39struct ssh_sandbox {
40	pid_t child_pid;
41};
42
43struct ssh_sandbox *
44ssh_sandbox_init(struct monitor *monitor)
45{
46	struct ssh_sandbox *box;
47
48	/*
49	 * Strictly, we don't need to maintain any state here but we need
50	 * to return non-NULL to satisfy the API.
51	 */
52	debug3("%s: preparing Darwin sandbox", __func__);
53	box = xcalloc(1, sizeof(*box));
54	box->child_pid = 0;
55
56	return box;
57}
58
59void
60ssh_sandbox_child(struct ssh_sandbox *box)
61{
62	char *errmsg;
63	struct rlimit rl_zero;
64
65	debug3("%s: starting Darwin sandbox", __func__);
66	if (sandbox_init(kSBXProfilePureComputation, SANDBOX_NAMED,
67	    &errmsg) == -1)
68		fatal("%s: sandbox_init: %s", __func__, errmsg);
69
70	/*
71	 * The kSBXProfilePureComputation still allows sockets, so
72	 * we must disable these using rlimit.
73	 */
74	rl_zero.rlim_cur = rl_zero.rlim_max = 0;
75	if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1)
76		fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s",
77			__func__, strerror(errno));
78	if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1)
79		fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s",
80			__func__, strerror(errno));
81	if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1)
82		fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s",
83			__func__, strerror(errno));
84}
85
86void
87ssh_sandbox_parent_finish(struct ssh_sandbox *box)
88{
89	free(box);
90	debug3("%s: finished", __func__);
91}
92
93void
94ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
95{
96	box->child_pid = child_pid;
97}
98
99#endif /* SANDBOX_DARWIN */
100