1 /* $OpenBSD: auth2-none.c,v 1.22 2018/07/09 21:35:50 markus 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 "includes.h"
27
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <sys/uio.h>
31
32 #include <fcntl.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37
38 #include "atomicio.h"
39 #include "xmalloc.h"
40 #include "sshkey.h"
41 #include "hostfile.h"
42 #include "auth.h"
43 #include "packet.h"
44 #include "log.h"
45 #include "misc.h"
46 #include "servconf.h"
47 #include "compat.h"
48 #include "ssh2.h"
49 #include "ssherr.h"
50 #ifdef GSSAPI
51 #include "ssh-gss.h"
52 #endif
53 #include "monitor_wrap.h"
54
55 /* import */
56 extern ServerOptions options;
57
58 /* "none" is allowed only one time */
59 static int none_enabled = 1;
60
61 static int
userauth_none(struct ssh * ssh)62 userauth_none(struct ssh *ssh)
63 {
64 int r;
65
66 none_enabled = 0;
67 if ((r = sshpkt_get_end(ssh)) != 0)
68 fatal("%s: %s", __func__, ssh_err(r));
69
70 /* no password authentication in Android. */
71 #if !defined(ANDROID)
72 if (options.permit_empty_passwd && options.password_authentication)
73 return (PRIVSEP(auth_password(ssh, "")));
74 #endif
75 return (0);
76 }
77
78 Authmethod method_none = {
79 "none",
80 userauth_none,
81 &none_enabled
82 };
83