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 */
48 extern ServerOptions options;
49
50 static int
userauth_passwd(Authctxt * authctxt)51 userauth_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 #if !defined(ANDROID)
71 /* no password authentication in Android */
72 else if (PRIVSEP(auth_password(authctxt, password)) == 1)
73 authenticated = 1;
74 #endif
75 explicit_bzero(password, len);
76 free(password);
77 return authenticated;
78 }
79
80 Authmethod method_passwd = {
81 "password",
82 userauth_passwd,
83 &options.password_authentication
84 };
85