1/* $OpenBSD: auth2-passwd.c,v 1.21 2022/05/27 04:29:40 dtucker 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
30#include <stdlib.h>
31#include <string.h>
32#include <stdarg.h>
33#include <stdio.h>
34
35#include "packet.h"
36#include "ssherr.h"
37#include "log.h"
38#include "sshkey.h"
39#include "hostfile.h"
40#include "auth.h"
41#ifdef GSSAPI
42#include "ssh-gss.h"
43#endif
44#include "monitor_wrap.h"
45#include "misc.h"
46#include "servconf.h"
47
48/* import */
49extern ServerOptions options;
50
51static int
52userauth_passwd(struct ssh *ssh, const char *method)
53{
54	char *password = NULL;
55	int authenticated = 0, r;
56	u_char change;
57	size_t len = 0;
58
59	if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||
60	    (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||
61	    (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||
62	    (r = sshpkt_get_end(ssh)) != 0) {
63		freezero(password, len);
64		fatal_fr(r, "parse packet");
65	}
66
67	if (change)
68		logit("password change not supported");
69	else if (PRIVSEP(auth_password(ssh, password)) == 1)
70		authenticated = 1;
71	freezero(password, len);
72	return authenticated;
73}
74
75Authmethod method_passwd = {
76	"password",
77	NULL,
78	userauth_passwd,
79	&options.password_authentication
80};
81