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1/* $OpenBSD: auth2-none.c,v 1.26 2024/05/17 00:30:23 djm Exp $ */
2/*
3 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/types.h>
27#include <stdarg.h>
28#include <stdio.h>
29
30#include "xmalloc.h"
31#include "sshkey.h"
32#include "hostfile.h"
33#include "auth.h"
34#include "packet.h"
35#include "log.h"
36#include "misc.h"
37#include "servconf.h"
38#include "ssh2.h"
39#include "ssherr.h"
40#ifdef GSSAPI
41#include "ssh-gss.h"
42#endif
43#include "monitor_wrap.h"
44
45/* import */
46extern ServerOptions options;
47extern struct authmethod_cfg methodcfg_none;
48
49extern int none_enabled;
50
51static int
52userauth_none(struct ssh *ssh, const char *method)
53{
54 int r;
55
56 none_enabled = 0;
57 if ((r = sshpkt_get_end(ssh)) != 0)
58 fatal_fr(r, "parse packet");
59 if (options.permit_empty_passwd && options.password_authentication)
60 return mm_auth_password(ssh, "");
61 return (0);
62}
63
64Authmethod method_none = {
65 &methodcfg_none,
66 userauth_none,
67};