1 /* $OpenBSD: sandbox-pledge.c,v 1.2 2020/10/18 11:32:01 djm Exp $ */
2 /*
3 * Copyright (c) 2015 Theo de Raadt <deraadt@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/types.h>
19 #include <sys/ioctl.h>
20 #include <sys/syscall.h>
21 #include <sys/socket.h>
22 #include <sys/wait.h>
23
24 #include <errno.h>
25 #include <limits.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <pwd.h>
31
32 #include "log.h"
33 #include "ssh-sandbox.h"
34 #include "xmalloc.h"
35
36 struct ssh_sandbox {
37 pid_t child_pid;
38 };
39
40 struct ssh_sandbox *
ssh_sandbox_init(void)41 ssh_sandbox_init(void)
42 {
43 struct ssh_sandbox *box;
44
45 debug3_f("preparing pledge sandbox");
46 box = xcalloc(1, sizeof(*box));
47 box->child_pid = 0;
48
49 return box;
50 }
51
52 void
ssh_sandbox_child(struct ssh_sandbox * box)53 ssh_sandbox_child(struct ssh_sandbox *box)
54 {
55 if (pledge("stdio", NULL) == -1)
56 fatal_f("pledge()");
57 }
58
59 void
ssh_sandbox_parent_finish(struct ssh_sandbox * box)60 ssh_sandbox_parent_finish(struct ssh_sandbox *box)
61 {
62 free(box);
63 debug3_f("finished");
64 }
65
66 void
ssh_sandbox_parent_preauth(struct ssh_sandbox * box,pid_t child_pid)67 ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
68 {
69 box->child_pid = child_pid;
70 /* Nothing to do here */
71 }
72