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markus@openbsd.orgeb272ea2017-05-30 14:29:59 +00001/* $OpenBSD: auth2-passwd.c,v 1.14 2017/05/30 14:29:59 markus Exp $ */
Ben Lindstrom855bf3a2002-06-06 20:27:55 +00002/*
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"
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000027
Damien Millerd7834352006-08-05 12:39:39 +100028#include <sys/types.h>
29
Damien Millere3476ed2006-07-24 14:13:33 +100030#include <string.h>
Damien Millerd7834352006-08-05 12:39:39 +100031#include <stdarg.h>
Damien Millere3476ed2006-07-24 14:13:33 +100032
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000033#include "packet.h"
markus@openbsd.org60306b22017-05-30 14:26:49 +000034#include "ssherr.h"
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000035#include "log.h"
markus@openbsd.org60306b22017-05-30 14:26:49 +000036#include "sshkey.h"
Damien Millerd7834352006-08-05 12:39:39 +100037#include "hostfile.h"
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000038#include "auth.h"
Damien Millerd7834352006-08-05 12:39:39 +100039#include "buffer.h"
40#ifdef GSSAPI
41#include "ssh-gss.h"
42#endif
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000043#include "monitor_wrap.h"
Damien Miller7acefbb2014-07-18 14:11:24 +100044#include "misc.h"
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000045#include "servconf.h"
46
47/* import */
48extern ServerOptions options;
49
50static int
markus@openbsd.orgeb272ea2017-05-30 14:29:59 +000051userauth_passwd(struct ssh *ssh)
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000052{
markus@openbsd.org60306b22017-05-30 14:26:49 +000053 char *password;
54 int authenticated = 0, r;
55 u_char change;
56 size_t len;
Darren Tuckerea287062003-12-31 11:43:24 +110057
markus@openbsd.org60306b22017-05-30 14:26:49 +000058 if ((r = sshpkt_get_u8(ssh, &change)) != 0 ||
59 (r = sshpkt_get_cstring(ssh, &password, &len)) != 0 ||
60 (change && (r = sshpkt_get_cstring(ssh, NULL, NULL)) != 0) ||
61 (r = sshpkt_get_end(ssh)) != 0)
62 fatal("%s: %s", __func__, ssh_err(r));
Darren Tuckerea287062003-12-31 11:43:24 +110063
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000064 if (change)
Damien Miller996acd22003-04-09 20:59:48 +100065 logit("password change not supported");
markus@openbsd.org60306b22017-05-30 14:26:49 +000066 else if (PRIVSEP(auth_password(ssh->authctxt, password)) == 1)
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000067 authenticated = 1;
Damien Millera5103f42014-02-04 11:20:14 +110068 explicit_bzero(password, len);
Darren Tuckera627d422013-06-02 07:31:17 +100069 free(password);
Ben Lindstrom855bf3a2002-06-06 20:27:55 +000070 return authenticated;
71}
72
73Authmethod method_passwd = {
74 "password",
75 userauth_passwd,
76 &options.password_authentication
77};