sandbox-tame.c

/* $OpenBSD: sandbox-tame.c,v 1.2 2015/10/02 15:52:55 deraadt Exp $ */
/*
 * Copyright (c) 2015 Theo de Raadt <deraadt@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <sys/socket.h>
#include <sys/wait.h>

#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>

#include "log.h"
#include "ssh-sandbox.h"
#include "xmalloc.h"

struct ssh_sandbox {
	pid_t child_pid;
};

struct ssh_sandbox *
ssh_sandbox_init(void)
{
	struct ssh_sandbox *box;

	debug3("%s: preparing tame sandbox", __func__);
	box = xcalloc(1, sizeof(*box));
	box->child_pid = 0;

	return box;
}

void
ssh_sandbox_child(struct ssh_sandbox *box)
{
	if (tame("stdio", NULL) == -1)
		fatal("%s: tame()", __func__);
}

void
ssh_sandbox_parent_finish(struct ssh_sandbox *box)
{
	free(box);
	debug3("%s: finished", __func__);
}

void
ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)
{
	box->child_pid = child_pid;
	/* Nothing to do here */
}