1/*	$NetBSD: auth2-passwd.c,v 1.16 2022/10/05 22:39:36 christos Exp $	*/
2/* $OpenBSD: auth2-passwd.c,v 1.21 2022/05/27 04:29:40 dtucker Exp $ */
3
4/*
5 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "includes.h"
29__RCSID("$NetBSD: auth2-passwd.c,v 1.16 2022/10/05 22:39:36 christos Exp $");
30#include <sys/types.h>
31
32#include <stdlib.h>
33#include <string.h>
34#include <stdarg.h>
35#include <stdio.h>
36
37#include "packet.h"
38#include "ssherr.h"
39#include "log.h"
40#include "sshkey.h"
41#include "hostfile.h"
42#include "auth.h"
43#ifdef GSSAPI
44#include "ssh-gss.h"
45#endif
46#include "monitor_wrap.h"
47#include "misc.h"
48#include "servconf.h"
49
50/* import */
51extern ServerOptions options;
52
53static int
54userauth_passwd(struct ssh *ssh, const char *method)
55{
56	char *password = NULL;
57	int authenticated = 0, r;
58	u_char change;
59	size_t len = 0;
60
61	if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||
62	    (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||
63	    (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||
64	    (r = sshpkt_get_end(ssh)) != 0) {
65		freezero(password, len);
66		fatal_fr(r, "parse packet");
67	}
68
69	if (change)
70		logit("password change not supported");
71	else if (PRIVSEP(auth_password(ssh, password)) == 1)
72		authenticated = 1;
73	freezero(password, len);
74	return authenticated;
75}
76
77Authmethod method_passwd = {
78	"password",
79	NULL,
80	userauth_passwd,
81	&options.password_authentication
82};
83