auth2-passwd.c revision 295367 
1/* $OpenBSD: auth2-passwd.c,v 1.12 2014/07/15 15:54:14 millert 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 <string.h>
31#include <stdarg.h>
32
33#include "xmalloc.h"
34#include "packet.h"
35#include "log.h"
36#include "key.h"
37#include "hostfile.h"
38#include "auth.h"
39#include "buffer.h"
40#ifdef GSSAPI
41#include "ssh-gss.h"
42#endif
43#include "monitor_wrap.h"
44#include "misc.h"
45#include "servconf.h"
46
47/* import */
48extern ServerOptions options;
49
50static int
51userauth_passwd(Authctxt *authctxt)
52{
53	char *password, *newpass;
54	int authenticated = 0;
55	int change;
56	u_int len, newlen;
57
58	change = packet_get_char();
59	password = packet_get_string(&len);
60	if (change) {
61		/* discard new password from packet */
62		newpass = packet_get_string(&newlen);
63		explicit_bzero(newpass, newlen);
64		free(newpass);
65	}
66	packet_check_eom();
67
68	if (change)
69		logit("password change not supported");
70	else if (PRIVSEP(auth_password(authctxt, password)) == 1)
71		authenticated = 1;
72	explicit_bzero(password, len);
73	free(password);
74	return authenticated;
75}
76
77Authmethod method_passwd = {
78	"password",
79	userauth_passwd,
80	&options.password_authentication
81};
82