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not able to authenticate user with e-Directory LDAP

Status
Open
Subject
not able to authenticate user with e-Directory LDAP
Version
4.x
Category
  • Usability
Feature
External Authentication (LDAP, AD, PAM, CAS, etc)
Resolution status
New
Submitted by
talindoche
Lastmod by
talindoche
Rating
(0)
Description

Scenario:
TikiWiki version 4.1
Auth against LDAP
LDAP being used: Novell eDirectory

Problem:
user can not log in unless the complete DN of the user is specified.
In my scenario the users are spread across the complete tree, so no chance to provide a specific "User DN", additionally a "Base DN" needs to be specified in order restrict the search to the city where the service runs. Finally only the default option provided at the "LDAP Bind Type" seems to be correct for eDirectory.

How this has been solved:
1.- The code modified has been: lib/auth/ldap.php
2.- If the LDAP connect operation fails, then a try to search for the user is triggered
3.- if the user is found then the LDAP, the his/her DN is extracted and a new LDAP connect is performed.

Here the diff of the modified code:

diff -uN ldap.php ldap.php.new 
--- ldap.php	2009-10-30 16:53:31.000000000 +0100
+++ ldap.php.new	2010-01-13 22:28:18.000000000 +0100
@@ -200,6 +200,50 @@
 		
 		$this->ldaplink= Net_LDAP2::connect($options);
 		if(Net_LDAP2::isError($this->ldaplink)) {
+			/* 	This modification is placed in order to add a kind of e-Directory compatibility.
+					For e-Directory and according to what I found about documentation - please consider I'm not an expert on this matter - 
+					e-Directory will only get a positive result for the user search (with is password) only if the dn is pointing to the place where
+					the user object has been created, so we need first to find this data.
+					In the next lines the user data will be searched, and once found (if found) the info related to binddn will be updated
+			*/
+			//	filters to locate the user
+			$filter1=Net_LDAP2_Filter::create('objectClass','equals',$this->options['useroc']);
+			$filter2=Net_LDAP2_Filter::create($this->options['userattr'],'equals',$this->options['username']);
+			$filter=Net_LDAP2_Filter::combine('and',array($filter1,$filter2));
+			if(Net_LDAP2::isError($filter)) {
+				$this->add_log('ldap','LDAP Filter creation error: '.$filter->getMessage().' at line '.__LINE__.' in '.__FILE__);
+				return false;
+			}
+			$searchoptions=array('scope' => $this->options['scope']);
+			//	unset the binddn, if set then the connect will fail
+			unset ($options['binddn']);
+			$this->ldaplink= Net_LDAP2::connect($options);
+			if(Net_LDAP2::isError($this->ldaplink)) {
+				$this->add_log('ldap','Error: '.$this->ldaplink->getMessage().' at line '.__LINE__.' in '.__FILE__);
+				return($this->ldaplink->getCode());
+			}
+			$searchresult = $this->ldaplink->search($this->options['basedn'],$filter,$searchoptions);
+			if($searchresult->count()!=1) {
+				// More then 1 user ... problem
+				$this->add_log('ldap','Error: ldap search found this amount of useres:'.$searchresult->count().' which is not 1. at line '.__LINE__.' in '.__FILE__);
+				return false;
+			}
+			$entry=$searchresult->shiftEntry();
+			if (Net_LDAP2::isError($entry)) {
+				$this->add_log('ldap','Error fetching user entries: '.$entry->getMessage().' at line '.__LINE__.' in '.__FILE__);
+				return($this->ldaplink->getCode());
+			}
+			//	Set the binddn again
+			$options['binddn']=$entry->dn();
+			// Try again now with the correct binddn
+			$this->ldaplink= Net_LDAP2::connect($options);
+			if(Net_LDAP2::isError($this->ldaplink)) {
+				$this->add_log('ldap','Error: '.$this->ldaplink->getMessage().' at line '.__LINE__.' in '.__FILE__);
+				// return Net_LDAP2 Error codes. No need to redefine this.
+				return($this->ldaplink->getCode());
+			}
+			// The rest of the code gets encapsulated in the else
+		}else {
 			$this->add_log('ldap','Error: '.$this->ldaplink->getMessage().' at line '.__LINE__.' in '.__FILE__);
 			// return Net_LDAP2 Error codes. No need to redefine this.
 			return($this->ldaplink->getCode());
@@ -371,5 +415,5 @@
 		if($this->options['debug']) 
 			$this->logslib->add_log($facility,$message);
 	}
-
+  
 }


References:
Info in TikiForum
Info about eDirectory

Hope this could be a kind of contribution
TalindoChe

Importance
1 low
Priority
5
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Version: Create show2.tikiwiki.org instance
Ticket ID
2973
Created
Wednesday 13 January, 2010 22:33:28 GMT-0000
LastModif
Wednesday 13 January, 2010 22:33:28 GMT-0000

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