crypto/openssh/sandbox-pledge.c

   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 "includes.h"
  19
  20 #ifdef SANDBOX_PLEDGE
  21
  22 #include <sys/types.h>
  23 #include <sys/ioctl.h>
  24 #include <sys/syscall.h>
  25 #include <sys/socket.h>
  26 #include <sys/wait.h>
  27
  28 #include <errno.h>
  29 #include <limits.h>
  30 #include <stdarg.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <unistd.h>
  34 #include <pwd.h>
  35
  36 #include "log.h"
  37 #include "ssh-sandbox.h"
  38 #include "xmalloc.h"
  39
  40 struct ssh_sandbox {
  41         pid_t child_pid;
  42 };
  43
  44 struct ssh_sandbox *
  45 ssh_sandbox_init(struct monitor *m)
  46 {
  47         struct ssh_sandbox *box;
  48
  49         debug3_f("preparing pledge sandbox");
  50         box = xcalloc(1, sizeof(*box));
  51         box->child_pid = 0;
  52
  53         return box;
  54 }
  55
  56 void
  57 ssh_sandbox_child(struct ssh_sandbox *box)
  58 {
  59         if (pledge("stdio", NULL) == -1)
  60                 fatal_f("pledge()");
  61 }
  62
  63 void
  64 ssh_sandbox_parent_finish(struct ssh_sandbox *box)
  65 {
  66         free(box);
  67         debug3_f("finished");
  68 }
  69
  70 void
  71 ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
  72 {
  73         box->child_pid = child_pid;
  74         /* Nothing to do here */
  75 }
  76
  77 #endif /* SANDBOX_PLEDGE */