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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
|
<?php
/**
* LDAP authentication backend
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
* @author Chris Smith <chris@jalakaic.co.uk>
*/
class auth_ldap extends auth_basic {
var $cnf = null;
var $con = null;
var $bound = 0; // 0: anonymous, 1: user, 2: superuser
/**
* Constructor
*/
function auth_ldap(){
global $conf;
$this->cnf = $conf['auth']['ldap'];
// ldap extension is needed
if(!function_exists('ldap_connect')) {
if ($this->cnf['debug'])
msg("LDAP err: PHP LDAP extension not found.",-1,__LINE__,__FILE__);
$this->success = false;
return;
}
if(empty($this->cnf['groupkey'])) $this->cnf['groupkey'] = 'cn';
// auth_ldap currently just handles authentication, so no
// capabilities are set
}
/**
* Check user+password
*
* Checks if the given user exists and the given
* plaintext password is correct by trying to bind
* to the LDAP server
*
* @author Andreas Gohr <andi@splitbrain.org>
* @return bool
*/
function checkPass($user,$pass){
// reject empty password
if(empty($pass)) return false;
if(!$this->_openLDAP()) return false;
// indirect user bind
if($this->cnf['binddn'] && $this->cnf['bindpw']){
// use superuser credentials
if(!@ldap_bind($this->con,$this->cnf['binddn'],$this->cnf['bindpw'])){
if($this->cnf['debug'])
msg('LDAP bind as superuser: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
return false;
}
$this->bound = 2;
}else if($this->cnf['binddn'] &&
$this->cnf['usertree'] &&
$this->cnf['userfilter']) {
// special bind string
$dn = $this->_makeFilter($this->cnf['binddn'],
array('user'=>$user,'server'=>$this->cnf['server']));
}else if(strpos($this->cnf['usertree'], '%{user}')) {
// direct user bind
$dn = $this->_makeFilter($this->cnf['usertree'],
array('user'=>$user,'server'=>$this->cnf['server']));
}else{
// Anonymous bind
if(!@ldap_bind($this->con)){
msg("LDAP: can not bind anonymously",-1);
if($this->cnf['debug'])
msg('LDAP anonymous bind: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
return false;
}
}
// Try to bind to with the dn if we have one.
if(!empty($dn)) {
// User/Password bind
if(!@ldap_bind($this->con,$dn,$pass)){
if($this->cnf['debug']){
msg("LDAP: bind with $dn failed", -1,__LINE__,__FILE__);
msg('LDAP user dn bind: '.htmlspecialchars(ldap_error($this->con)),0);
}
return false;
}
$this->bound = 1;
return true;
}else{
// See if we can find the user
$info = $this->getUserData($user,true);
if(empty($info['dn'])) {
return false;
} else {
$dn = $info['dn'];
}
// Try to bind with the dn provided
if(!@ldap_bind($this->con,$dn,$pass)){
if($this->cnf['debug']){
msg("LDAP: bind with $dn failed", -1,__LINE__,__FILE__);
msg('LDAP user bind: '.htmlspecialchars(ldap_error($this->con)),0);
}
return false;
}
$this->bound = 1;
return true;
}
return false;
}
/**
* Return user info
*
* Returns info about the given user needs to contain
* at least these fields:
*
* name string full name of the user
* mail string email addres of the user
* grps array list of groups the user is in
*
* This LDAP specific function returns the following
* addional fields:
*
* dn string distinguished name (DN)
* uid string Posix User ID
* inbind bool for internal use - avoid loop in binding
*
* @author Andreas Gohr <andi@splitbrain.org>
* @author Trouble
* @author Dan Allen <dan.j.allen@gmail.com>
* @author <evaldas.auryla@pheur.org>
* @author Stephane Chazelas <stephane.chazelas@emerson.com>
* @return array containing user data or false
*/
function getUserData($user,$inbind=false) {
global $conf;
if(!$this->_openLDAP()) return false;
// force superuser bind if wanted and not bound as superuser yet
if($this->cnf['binddn'] && $this->cnf['bindpw'] && $this->bound < 2){
// use superuser credentials
if(!@ldap_bind($this->con,$this->cnf['binddn'],$this->cnf['bindpw'])){
if($this->cnf['debug'])
msg('LDAP bind as superuser: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
return false;
}
$this->bound = 2;
}elseif($this->bound == 0 && !$inbind) {
// in some cases getUserData is called outside the authentication workflow
// eg. for sending email notification on subscribed pages. This data might not
// be accessible anonymously, so we try to rebind the current user here
$pass = PMA_blowfish_decrypt($_SESSION[DOKU_COOKIE]['auth']['pass'],auth_cookiesalt());
$this->checkPass($_SESSION[DOKU_COOKIE]['auth']['user'], $pass);
}
$info['user'] = $user;
$info['server'] = $this->cnf['server'];
//get info for given user
$base = $this->_makeFilter($this->cnf['usertree'], $info);
if(!empty($this->cnf['userfilter'])) {
$filter = $this->_makeFilter($this->cnf['userfilter'], $info);
} else {
$filter = "(ObjectClass=*)";
}
$sr = @ldap_search($this->con, $base, $filter);
$result = @ldap_get_entries($this->con, $sr);
if($this->cnf['debug']){
msg('LDAP user search: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
msg('LDAP search at: '.htmlspecialchars($base.' '.$filter),0,__LINE__,__FILE__);
}
// Don't accept more or less than one response
if(!is_array($result) || $result['count'] != 1){
return false; //user not found
}
$user_result = $result[0];
ldap_free_result($sr);
// general user info
$info['dn'] = $user_result['dn'];
$info['gid'] = $user_result['gidnumber'][0];
$info['mail'] = $user_result['mail'][0];
$info['name'] = $user_result['cn'][0];
$info['grps'] = array();
// overwrite if other attribs are specified.
if(is_array($this->cnf['mapping'])){
foreach($this->cnf['mapping'] as $localkey => $key) {
if(is_array($key)) {
// use regexp to clean up user_result
list($key, $regexp) = each($key);
if($user_result[$key]) foreach($user_result[$key] as $grp){
if (preg_match($regexp,$grp,$match)) {
if($localkey == 'grps') {
$info[$localkey][] = $match[1];
} else {
$info[$localkey] = $match[1];
}
}
}
} else {
$info[$localkey] = $user_result[$key][0];
}
}
}
$user_result = array_merge($info,$user_result);
//get groups for given user if grouptree is given
if ($this->cnf['grouptree'] && $this->cnf['groupfilter']) {
$base = $this->_makeFilter($this->cnf['grouptree'], $user_result);
$filter = $this->_makeFilter($this->cnf['groupfilter'], $user_result);
$sr = @ldap_search($this->con, $base, $filter, array($this->cnf['groupkey']));
if(!$sr){
msg("LDAP: Reading group memberships failed",-1);
if($this->cnf['debug']){
msg('LDAP group search: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
msg('LDAP search at: '.htmlspecialchars($base.' '.$filter),0,__LINE__,__FILE__);
}
return false;
}
$result = ldap_get_entries($this->con, $sr);
ldap_free_result($sr);
if(is_array($result)) foreach($result as $grp){
if(!empty($grp[$this->cnf['groupkey']][0])){
if($this->cnf['debug'])
msg('LDAP usergroup: '.htmlspecialchars($grp[$this->cnf['groupkey']][0]),0,__LINE__,__FILE__);
$info['grps'][] = $grp[$this->cnf['groupkey']][0];
}
}
}
// always add the default group to the list of groups
if(!in_array($conf['defaultgroup'],$info['grps'])){
$info['grps'][] = $conf['defaultgroup'];
}
return $info;
}
/**
* Most values in LDAP are case-insensitive
*/
function isCaseSensitive(){
return false;
}
/**
* Make LDAP filter strings.
*
* Used by auth_getUserData to make the filter
* strings for grouptree and groupfilter
*
* filter string ldap search filter with placeholders
* placeholders array array with the placeholders
*
* @author Troels Liebe Bentsen <tlb@rapanden.dk>
* @return string
*/
function _makeFilter($filter, $placeholders) {
preg_match_all("/%{([^}]+)/", $filter, $matches, PREG_PATTERN_ORDER);
//replace each match
foreach ($matches[1] as $match) {
//take first element if array
if(is_array($placeholders[$match])) {
$value = $placeholders[$match][0];
} else {
$value = $placeholders[$match];
}
$value = $this->_filterEscape($value);
$filter = str_replace('%{'.$match.'}', $value, $filter);
}
return $filter;
}
/**
* Escape a string to be used in a LDAP filter
*
* Ported from Perl's Net::LDAP::Util escape_filter_value
*
* @author Andreas Gohr
*/
function _filterEscape($string){
return preg_replace('/([\x00-\x1F\*\(\)\\\\])/e',
'"\\\\\".join("",unpack("H2","$1"))',
$string);
}
/**
* Opens a connection to the configured LDAP server and sets the wanted
* option on the connection
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function _openLDAP(){
if($this->con) return true; // connection already established
$this->bound = 0;
$port = ($this->cnf['port']) ? $this->cnf['port'] : 389;
$this->con = @ldap_connect($this->cnf['server'],$port);
if(!$this->con){
msg("LDAP: couldn't connect to LDAP server",-1);
return false;
}
//set protocol version and dependend options
if($this->cnf['version']){
if(!@ldap_set_option($this->con, LDAP_OPT_PROTOCOL_VERSION,
$this->cnf['version'])){
msg('Setting LDAP Protocol version '.$this->cnf['version'].' failed',-1);
if($this->cnf['debug'])
msg('LDAP version set: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
}else{
//use TLS (needs version 3)
if($this->cnf['starttls']) {
if (!@ldap_start_tls($this->con)){
msg('Starting TLS failed',-1);
if($this->cnf['debug'])
msg('LDAP TLS set: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
}
}
// needs version 3
if(isset($this->cnf['referrals'])) {
if(!@ldap_set_option($this->con, LDAP_OPT_REFERRALS,
$this->cnf['referrals'])){
msg('Setting LDAP referrals to off failed',-1);
if($this->cnf['debug'])
msg('LDAP referal set: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
}
}
}
}
//set deref mode
if($this->cnf['deref']){
if(!@ldap_set_option($this->con, LDAP_OPT_DEREF, $this->cnf['deref'])){
msg('Setting LDAP Deref mode '.$this->cnf['deref'].' failed',-1);
if($this->cnf['debug'])
msg('LDAP deref set: '.htmlspecialchars(ldap_error($this->con)),0,__LINE__,__FILE__);
}
}
return true;
}
}
//Setup VIM: ex: et ts=4 enc=utf-8 :
|
