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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
<?php
/**
* This is used to authenticate against an LDAP server
*
* tested with openldap 2.x on Debian only
*
* PHPs LDAP extension is needed
*/
/**
* connects to the ldap server and holds the connection
* in global scope for multiple use
*/
function auth_ldap_connect(){
global $LDAP_CONNECTION;
global $conf;
$cnf = $conf['auth']['ldap'];
if(!$LDAP_CONNECTION){
$LDAP_CONNECTION = @ldap_connect($cnf['server']);
if(!$LDAP_CONNECTION){
msg("LDAP: couldn't connect to LDAP server",-1);
return false;
}
if($cnf['version']){
if(!@ldap_set_option($LDAP_CONNECTION,
LDAP_OPT_PROTOCOL_VERSION,
$cnf['version'])){
msg('Setting LDAP Protocol version '.$cnf['version'].' failed',-1);
}
}
}
return $LDAP_CONNECTION;
}
/**
* required auth function
*
* Checks if the given user exists and the given
* plaintext password is correct
*
* It does so by trying to connect to the LDAP server
*/
function auth_checkPass($user,$pass){
global $conf;
$cnf = $conf['auth']['ldap'];
//connect to LDAP Server
$conn = auth_ldap_connect();
if(!$conn) return false;
//get dn for given user
$info = auth_getUserData($user);
$dn = $info['dn'];
if(!$dn) return false;
//try to bind with dn
if(@ldap_bind($conn,$dn,$pass)){
return true;
}
return false;
}
/**
* Required auth function
*
* Returns info about the given user needs to contain
* at least these fields:
*
* name string full name of the user
* mail string email addres of the user
* grps array list of groups the user is in
*
* This LDAP specific function returns the following
* addional fields
*
* dn string distinguished name (DN)
* uid string Posix User ID
*/
function auth_getUserData($user){
global $conf;
$cnf = $conf['auth']['ldap'];
//connect to LDAP Server
$conn = auth_ldap_connect();
if(!$conn) return false;
//anonymous bind to lookup userdata
if(!@ldap_bind($conn)){
msg("LDAP: can not bind anonymously",-1);
return false;
}
//get info for given user
$filter = str_replace('%u',$user,$cnf['userfilter']);
$base = str_replace('%u',$user,$cnf['usertree']);
$sr = ldap_search($conn, $base, $filter);;
$result = ldap_get_entries($conn, $sr);
if($result['count'] != 1){
return false; //user not found
}
//general user info
$info['dn'] = $result[0]['dn'];
$info['mail']= $result[0]['mail'][0];
$info['name']= $result[0]['cn'][0];
$info['uid'] = $result[0]['uid'][0];
//primary group id
$gid = $result[0]['gidnumber'][0];
//get groups for given user
$filter = "(&(objectClass=posixGroup)(|(gidNumber=$gid)(memberUID=".$info['uid'].")))";
$sr = @ldap_search($conn, $cnf['grouptree'], $filter);
if(!$sr){
msg("LDAP: Reading group memberships failed",-1);
return false;
}
$result = ldap_get_entries($conn, $sr);
foreach($result as $grp){
if(!empty($grp['cn'][0]))
$info['grps'][] = $grp['cn'][0];
}
return $info;
}
/**
* Required auth function
*
* Not implemented
*/
function auth_createUser($user,$name,$mail){
msg("Sorry. Creating users is not supported by the LDAP backend",-1);
return null;
}
?>
|
