auth2-passwd.c revision 1.14 
1/* $OpenBSD: auth2-passwd.c,v 1.14 2017/05/30 14:29:59 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 <sys/types.h>
27
28#include <string.h>
29#include <stdarg.h>
30
31#include "packet.h"
32#include "ssherr.h"
33#include "log.h"
34#include "sshkey.h"
35#include "hostfile.h"
36#include "auth.h"
37#include "buffer.h"
38#ifdef GSSAPI
39#include "ssh-gss.h"
40#endif
41#include "monitor_wrap.h"
42#include "misc.h"
43#include "servconf.h"
44
45/* import */
46extern ServerOptions options;
47
48static int
49userauth_passwd(struct ssh *ssh)
50{
51	char *password;
52	int authenticated = 0, r;
53	u_char change;
54	size_t len;
55
56	if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||
57	    (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||
58	    (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||
59	    (r = sshpkt_get_end(ssh)) != 0)
60		fatal("%s: %s", __func__, ssh_err(r));
61
62	if (change)
63		logit("password change not supported");
64	else if (PRIVSEP(auth_password(ssh->authctxt, password)) == 1)
65		authenticated = 1;
66	explicit_bzero(password, len);
67	free(password);
68	return authenticated;
69}
70
71Authmethod method_passwd = {
72	"password",
73	userauth_passwd,
74	&options.password_authentication
75};
76