auth2-passwd.c revision 264377 
1/* $OpenBSD: auth2-passwd.c,v 1.11 2014/02/02 03:44:31 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 "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 "servconf.h"
45
46/* import */
47extern ServerOptions options;
48
49static int
50userauth_passwd(Authctxt *authctxt)
51{
52	char *password, *newpass;
53	int authenticated = 0;
54	int change;
55	u_int len, newlen;
56
57	change = packet_get_char();
58	password = packet_get_string(&len);
59	if (change) {
60		/* discard new password from packet */
61		newpass = packet_get_string(&newlen);
62		explicit_bzero(newpass, newlen);
63		free(newpass);
64	}
65	packet_check_eom();
66
67	if (change)
68		logit("password change not supported");
69	else if (PRIVSEP(auth_password(authctxt, password)) == 1)
70		authenticated = 1;
71	explicit_bzero(password, len);
72	free(password);
73	return authenticated;
74}
75
76Authmethod method_passwd = {
77	"password",
78	userauth_passwd,
79	&options.password_authentication
80};
81