1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
<?php
/**
* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
/**
* User authentication via samba (smbclient)
*
* @category Apps
* @package UserExternal
* @author Robin Appelman <icewind@owncloud.com>
* @license http://www.gnu.org/licenses/agpl AGPL
* @link http://github.com/owncloud/apps
*/
class OC_User_SMB extends \OCA\user_external\Base{
private $host;
const SMBCLIENT = 'smbclient -L';
const LOGINERROR = 'NT_STATUS_LOGON_FAILURE';
/**
* Create new samba authentication provider
*
* @param string $host Hostname or IP of windows machine
*/
public function __construct($host) {
parent::__construct($host);
$this->host=$host;
}
/**
* @param string $uid
* @param string $password
* @return bool
*/
private function tryAuthentication($uid, $password) {
$uidEscaped = escapeshellarg($uid);
$password = escapeshellarg($password);
$command = self::SMBCLIENT.' '.escapeshellarg('//' . $this->host . '/dummy').' -U'.$uidEscaped.'%'.$password;
$lastline = exec($command, $output, $retval);
if ($retval === 127) {
OCP\Util::writeLog(
'user_external', 'ERROR: smbclient executable missing',
OCP\Util::ERROR
);
return false;
} else if (strpos($lastline, self::LOGINERROR) !== false) {
//normal login error
return false;
} else if (strpos($lastline, 'NT_STATUS_BAD_NETWORK_NAME') !== false) {
//login on minor error
goto login;
} else if ($retval != 0) {
//some other error
OCP\Util::writeLog(
'user_external', 'ERROR: smbclient error: ' . trim($lastline),
OCP\Util::ERROR
);
return false;
} else {
login:
return $uid;
}
}
/**
* Check if the password is correct without logging in the user
*
* @param string $uid The username
* @param string $password The password
*
* @return true/false
*/
public function checkPassword($uid, $password) {
// Check with an invalid password, if the user authenticates then fail
$attemptWithInvalidPassword = $this->tryAuthentication($uid, base64_encode($password));
if(is_string($attemptWithInvalidPassword)) {
return false;
}
// Check with valid password
$attemptWithValidPassword = $this->tryAuthentication($uid, $password);
if(is_string($attemptWithValidPassword)) {
$this->storeUser($uid);
return $uid;
}
return false;
}
}
|
