1/*	$NetBSD: auth2-none.c,v 1.14 2023/07/26 17:58:15 christos Exp $	*/
2/* $OpenBSD: auth2-none.c,v 1.25 2023/03/05 05:34:09 dtucker Exp $ */
3/*
4 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
28__RCSID("$NetBSD: auth2-none.c,v 1.14 2023/07/26 17:58:15 christos Exp $");
29#include <sys/types.h>
30#include <stdarg.h>
31#include <stdio.h>
32
33#include "xmalloc.h"
34#include "sshkey.h"
35#include "hostfile.h"
36#include "auth.h"
37#include "packet.h"
38#include "log.h"
39#include "misc.h"
40#include "servconf.h"
41#include "ssh2.h"
42#include "ssherr.h"
43#ifdef GSSAPI
44#include "ssh-gss.h"
45#endif
46#include "monitor_wrap.h"
47
48/* import */
49extern ServerOptions options;
50
51/* "none" is allowed only one time */
52static int none_enabled = 1;
53
54static int
55userauth_none(struct ssh *ssh, const char *method)
56{
57	int r;
58
59	none_enabled = 0;
60	if ((r = sshpkt_get_end(ssh)) != 0)
61		fatal_fr(r, "parse packet");
62	if (options.permit_empty_passwd && options.password_authentication)
63		return (PRIVSEP(auth_password(ssh, "")));
64	return (0);
65}
66
67Authmethod method_none = {
68	"none",
69	NULL,
70	userauth_none,
71	&none_enabled
72};
73