diff --git a/lib/Net/LDAP3.php b/lib/Net/LDAP3.php
index 7053105..d2a644c 100644
--- a/lib/Net/LDAP3.php
+++ b/lib/Net/LDAP3.php
@@ -1,3132 +1,3139 @@
 <?php
 
 /*
  +-----------------------------------------------------------------------+
  | Net/LDAP3.php                                                         |
  |                                                                       |
  | Based on code created by the Roundcube Webmail team.                  |
  |                                                                       |
  | Copyright (C) 2006-2014, The Roundcube Dev Team                       |
  | Copyright (C) 2012-2014, Kolab Systems AG                             |
  |                                                                       |
  | This program is free software: you can redistribute it and/or modify  |
  | it under the terms of the GNU General Public License as published by  |
  | the Free Software Foundation, either version 3 of the License, or     |
  | (at your option) any later version.                                   |
  |                                                                       |
  | This program is distributed in the hope that it will be useful,       |
  | but WITHOUT ANY WARRANTY; without even the implied warranty of        |
  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the          |
  | GNU General Public License for more details.                          |
  |                                                                       |
  | You should have received a copy of the GNU General Public License     |
  | along with this program.  If not, see <http://www.gnu.org/licenses/>. |
  |                                                                       |
  | PURPOSE:                                                              |
  |   Provide advanced functionality for accessing LDAP directories       |
  |                                                                       |
  +-----------------------------------------------------------------------+
  | Authors: Thomas Bruederli <roundcube@gmail.com>                       |
  |          Aleksander Machniak <machniak@kolabsys.com>                  |
  |          Jeroen van Meeuwen <vanmeeuwen@kolabsys.com>                 |
  +-----------------------------------------------------------------------+
 */
 
 require_once __DIR__ . '/LDAP3/Result.php';
 
 /**
  * Model class to access a LDAP directories
  *
  * @package Net_LDAP3
  */
 class Net_LDAP3
 {
     public $conn;
     public $vlv_active = false;
 
     private $attribute_level_rights_map = array(
         "r" => "read",
         "s" => "search",
         "w" => "write",
         "o" => "delete",
         "c" => "compare",
         "W" => "write",
         "O" => "delete"
     );
 
     private $entry_level_rights_map = array(
         "a" => "add",
         "d" => "delete",
         "n" => "modrdn",
         "v" => "read"
     );
 
     /*
      * Manipulate configuration through the config_set and config_get methods.
      * Available options:
      *       'debug'           => false,
      *       'hosts'           => array(),
      *       'port'            => 389,
      *       'use_tls'         => false,
      *       'ldap_version'    => 3,        // using LDAPv3
      *       'auth_method'     => '',       // SASL authentication method (for proxy auth), e.g. DIGEST-MD5
+     *       'gssapi_cn'       => null      // Kerberos cache name (KRB5CCNAME) for SASL GSSAPI authentication
      *       'numsub_filter'   => '(objectClass=organizationalUnit)', // with VLV, we also use numSubOrdinates to query the total number of records. Set this filter to get all numSubOrdinates attributes for counting
      *       'referrals'       => false,    // Sets the LDAP_OPT_REFERRALS option. Mostly used in multi-domain Active Directory setups
      *       'network_timeout' => 10,       // The timeout (in seconds) for connect + bind arrempts. This is only supported in PHP >= 5.3.0 with OpenLDAP 2.x
      *       'sizelimit'       => 0,        // Enables you to limit the count of entries fetched. Setting this to 0 means no limit.
      *       'timelimit'       => 0,        // Sets the number of seconds how long is spend on the search. Setting this to 0 means no limit.
      *       'vlv'             => false,    // force VLV off
      *       'config_root_dn'  => 'cn=config',  // Root DN to read config (e.g. vlv indexes) from
      *       'service_bind_dn' => 'uid=kolab-service,ou=Special Users,dc=example,dc=org',
      *       'service_bind_pw' => 'Welcome2KolabSystems',
      *       'root_dn'         => 'dc=example,dc=org',
      */
     protected $config = array(
         'sizelimit' => 0,
         'timelimit' => 0,
     );
 
     protected $debug_level = false;
     protected $list_page   = 1;
     protected $page_size   = 10;
     protected $icache      = array();
     protected $cache;
 
     // Use public method config_set('log_hook', $callback) to have $callback be
     // call_user_func'ed instead of the local log functions.
     protected $_log_hook;
 
     // Use public method config_set('config_get_hook', $callback) to have
     // $callback be call_user_func'ed instead of the local config_get function.
     protected $_config_get_hook;
 
     // Use public method config_set('config_set_hook', $callback) to have
     // $callback be call_user_func'ed instead of the local config_set function.
     protected $_config_set_hook;
 
     // Not Yet Implemented
     // Intended to allow hooking in for the purpose of caching.
     protected $_result_hook;
 
     // Runtime. These are not the variables you're looking for.
     protected $_current_bind_dn;
     protected $_current_bind_pw;
     protected $_current_host;
     protected $_supported_control = array();
     protected $_vlv_indexes_and_searches;
 
     /**
      * Constructor
      *
      * @param array $config Configuration parameters that have not already
      *                      been initialized. For configuration parameters
      *                      that have in fact been set, use the config_set()
      *                      method after initialization.
      */
     public function __construct($config = array())
     {
         if (!empty($config) && is_array($config)) {
             foreach ($config as $key => $value) {
                 if (empty($this->config[$key])) {
                     $setter = 'config_set_' . $key;
                     if (method_exists($this, $setter)) {
                         $this->$setter($value);
                     }
                     else if (isset($this->$key)) {
                         $this->$key = $value;
                     }
                     else {
                         $this->config[$key] = $value;
                     }
                 }
             }
         }
     }
 
     /**
      *  Add multiple entries to the directory information tree in one go.
      */
     public function add_entries($entries, $attributes = array())
     {
         // If $entries is an associative array, it's keys are DNs and its
         // values are the attributes for that DN.
         //
         // If $entries is a non-associative array, the attributes are expected
         // to be positional in $attributes.
 
         $result_set = array();
 
         if (array_keys($entries) == range(0, count($entries) - 1)) {
             // $entries is sequential
             if (count($entries) !== count($attributes)) {
                 $this->_error("LDAP: Wrong entry/attribute count in " . __FUNCTION__);
                 return false;
             }
 
             for ($i = 0; $i < count($entries); $i++) {
                 $result_set[$i] = $this->add_entry($entries[$i], $attributes[$i]);
             }
         }
         else {
             // $entries is associative
             foreach ($entries as $entry_dn => $entry_attributes) {
                 if (array_keys($attributes) !== range(0, count($attributes)-1)) {
                     // $attributes is associative as well, let's merge these
                     //
                     // $entry_attributes takes precedence, so is in the second
                     // position in array_merge()
                     $entry_attributes = array_merge($attributes, $entry_attributes);
                 }
 
                 $result_set[$entry_dn] = $this->add_entry($entry_dn, $entry_attributes);
             }
         }
 
         return $result_set;
     }
 
     /**
      * Add an entry to the directory information tree.
      */
     public function add_entry($entry_dn, $attributes)
     {
         // TODO:
         // - Get entry rdn attribute value from entry_dn and see if it exists in
         //   attributes -> issue warning if so (but not block the operation).
         $this->_debug("Entry DN", $entry_dn);
         $this->_debug("Attributes", $attributes);
 
         foreach ($attributes as $attr_name => $attr_value) {
             if (empty($attr_value)) {
                 unset($attributes[$attr_name]);
             } else if (is_array($attr_value)) {
                 $attributes[$attr_name] = array_values($attr_value);
             }
         }
 
         $this->_debug("C: Add $entry_dn: " . json_encode($attributes));
 
         if (!ldap_add($this->conn, $entry_dn, $attributes)) {
             $this->_debug("S: " . ldap_error($this->conn));
             $this->_warning("LDAP: Adding entry $entry_dn failed. " . ldap_error($this->conn));
 
             return false;
         }
 
         $this->_debug("S: OK");
 
         return true;
     }
 
     /**
      * Add replication agreements and initialize the consumer(s) for
      * $domain_root_dn.
      *
      * Searches the configured replicas for any of the current domain/config
      * databases, and uses this information to configure the additional
      * replication for the (new) domain database (at $domain_root_dn).
      *
      * Very specific to Netscape-based directory servers, and currently also
      * very specific to multi-master replication.
      */
     public function add_replication_agreements($domain_root_dn)
     {
         $replica_hosts = $this->list_replicas();
 
         if (empty($replica_hosts)) {
             return;
         }
 
         $result = $this->search($this->config_get('config_root_dn'), "(&(objectclass=nsDS5Replica)(nsDS5ReplicaType=3))", "sub");
 
         if (!$result) {
             $this->_debug("No replication configuration found.");
             return;
         }
 
         // Preserve the number of replicated databases we have, because the replication ID
         // can be calculated from the number of databases replicated, and the number of
         // servers.
         $num_replica_dbs = $result->count();
         $replicas        = $result->entries(true);
         $max_replica_agreements = 0;
 
         foreach ($replicas as $replica_dn => $replica_attrs) {
             $result = $this->search($replica_dn, "(objectclass=nsDS5ReplicationAgreement)", "sub");
             if ($result) {
                 if ($max_replica_agreements < $result->count()) {
                     $max_replica_agreements    = $result->count();
                     $max_replica_agreements_dn = $replica_dn;
                 }
             }
         }
 
         $max_repl_id = $num_replica_dbs * count($replica_hosts);
 
         $this->_debug("The current maximum replication ID is $max_repl_id");
         $this->_debug("The current maximum number of replication agreements for any database is $max_replica_agreements (for $max_replica_agreements_dn)");
         $this->_debug("With " . count($replica_hosts) . " replicas, the next is " . ($max_repl_id + 1) . " and the last one is " . ($max_repl_id + count($replica_hosts)));
 
         // Then add the replication agreements
         foreach ($replica_hosts as $num => $replica_host) {
             $ldap = new Net_LDAP3($this->config);
             $ldap->config_set('hosts', array($replica_host));
             $ldap->connect();
             $ldap->bind($this->_current_bind_dn, $this->_current_bind_pw);
 
             $replica_attrs = array(
                 'cn' => 'replica',
                 'objectclass' => array(
                     'top',
                     'nsds5replica',
                     'extensibleobject',
                 ),
                 'nsDS5ReplicaBindDN'     => $ldap->get_entry_attribute($replica_dn, "nsDS5ReplicaBindDN"),
                 'nsDS5ReplicaId'         => ($max_repl_id + $num + 1),
                 'nsDS5ReplicaRoot'       => $domain_root_dn,
                 'nsDS5ReplicaType'       => $ldap->get_entry_attribute($replica_dn, "nsDS5ReplicaType"),
                 'nsds5ReplicaPurgeDelay' => $ldap->get_entry_attribute($replica_dn, "nsds5ReplicaPurgeDelay"),
                 'nsDS5Flags'             => $ldap->get_entry_attribute($replica_dn, "nsDS5Flags")
             );
 
             $new_replica_dn = 'cn=replica,cn="' . $domain_root_dn . '",cn=mapping tree,cn=config';
 
             $this->_debug("Adding $new_replica_dn to $replica_host with attributes: " . var_export($replica_attrs, true));
 
             $result = $ldap->add_entry($new_replica_dn, $replica_attrs);
 
             if (!$result) {
                 $this->_error("LDAP: Could not add replication configuration to database for $domain_root_dn on $replica_host");
                 continue;
             }
 
             $result = $ldap->search($replica_dn, "(objectclass=nsDS5ReplicationAgreement)", "sub");
 
             if (!$result) {
                 $this->_error("LDAP: Host $replica_host does not have any replication agreements");
                 continue;
             }
 
             $entries = $result->entries(true);
             $replica_agreement_tpl_dn = key($entries);
 
             $this->_debug("Using " . var_export($replica_agreement_tpl_dn, true) . " as the template for new replication agreements");
 
             foreach ($replica_hosts as $replicate_to_host) {
                 // Skip the current server
                 if ($replicate_to_host == $replica_host) {
                     continue;
                 }
 
                 $this->_debug("Adding a replication agreement for $domain_root_dn to $replicate_to_host on " . $replica_host);
 
                 $attrs = array(
                     'objectclass',
                     'nsDS5ReplicaBindDN',
                     'nsDS5ReplicaCredentials',
                     'nsDS5ReplicaTransportInfo',
                     'nsDS5ReplicaBindMethod',
                     'nsDS5ReplicaHost',
                     'nsDS5ReplicaPort'
                 );
 
                 $replica_agreement_attrs = $ldap->get_entry_attributes($replica_agreement_tpl_dn, $attrs);
                 $replica_agreement_attrs['cn'] = array_shift(explode('.', $replicate_to_host)) . str_replace(array('dc=',','), array('_',''), $domain_root_dn);
                 $replica_agreement_attrs['nsDS5ReplicaRoot'] = $domain_root_dn;
                 $replica_agreement_dn = "cn=" . $replica_agreement_attrs['cn'] . "," . $new_replica_dn;
 
                 $this->_debug("Adding $replica_agreement_dn to $replica_host with attributes: " . var_export($replica_agreement_attrs, true));
 
                 $result = $ldap->add_entry($replica_agreement_dn, $replica_agreement_attrs);
 
                 if (!$result) {
                     $this->_error("LDAP: Failed adding $replica_agreement_dn");
                 }
             }
         }
 
         $server_id = implode('', array_diff($replica_hosts, $this->_server_id_not));
 
         $this->_debug("About to trigger consumer initialization for replicas on current 'parent': $server_id");
 
         $result = $this->search($this->config_get('config_root_dn'), "(&(objectclass=nsDS5ReplicationAgreement)(nsds5replicaroot=$domain_root_dn))", "sub");
 
         if ($result) {
             foreach ($result->entries(true) as $agreement_dn => $agreement_attrs) {
                 $this->modify_entry_attributes(
                     $agreement_dn,
                     array(
                         'replace' => array(
                             'nsds5BeginReplicaRefresh' => 'start',
                         ),
                     )
                 );
             }
         }
     }
 
     public function attribute_details($attributes = array())
     {
         $schema = $this->init_schema();
 
         if (!$schema) {
             return array();
         }
 
         $attribs = $schema->getAll('attributes');
 
         $attributes_details = array();
 
         foreach ($attributes as $attribute) {
             if (array_key_exists($attribute, $attribs)) {
                 $attrib_details = $attribs[$attribute];
 
                 if (!empty($attrib_details['sup'])) {
                     foreach ($attrib_details['sup'] as $super_attrib) {
                         $_attrib_details = $attribs[$super_attrib];
                         if (is_array($_attrib_details)) {
                             $attrib_details = array_merge($_attrib_details, $attrib_details);
                         }
                     }
                 }
             }
             else if (array_key_exists(strtolower($attribute), $attribs)) {
                 $attrib_details = $attribs[strtolower($attribute)];
 
                 if (!empty($attrib_details['sup'])) {
                     foreach ($attrib_details['sup'] as $super_attrib) {
                         $_attrib_details = $attribs[$super_attrib];
                         if (is_array($_attrib_details)) {
                             $attrib_details = array_merge($_attrib_details, $attrib_details);
                         }
                     }
                 }
             }
             else {
                 $this->_warning("LDAP: No schema details exist for attribute $attribute (which is strange)");
             }
 
             // The relevant parts only, please
             $attributes_details[$attribute] = array(
                 'type'        => !empty($attrib_details['single-value']) ? 'text' : 'list',
                 'description' => $attrib_details['desc'],
                 'syntax'      => $attrib_details['syntax'],
                 'max-length'  => $attrib_details['max-length'] ?: false,
             );
         }
 
         return $attributes_details;
     }
 
     public function attributes_allowed($objectclasses = array())
     {
         $this->_debug("Listing allowed_attributes for objectclasses", $objectclasses);
 
         if (!is_array($objectclasses) || empty($objectclasses)) {
             return false;
         }
 
         $schema = $this->init_schema();
         if (!$schema) {
             return false;
         }
 
         $may          = array();
         $must         = array();
         $superclasses = array();
 
         foreach ($objectclasses as $objectclass) {
             $superclass = $schema->superclass($objectclass);
             if (!empty($superclass)) {
                 $superclasses = array_merge($superclass, $superclasses);
             }
 
             $_may  = $schema->may($objectclass);
             $_must = $schema->must($objectclass);
 
             if (is_array($_may)) {
                 $may = array_merge($may, $_may);
             }
             if (is_array($_must)) {
                 $must = array_merge($must, $_must);
             }
         }
 
         $may          = array_unique($may);
         $must         = array_unique($must);
         $superclasses = array_unique($superclasses);
 
         return array('may' => $may, 'must' => $must, 'super' => $superclasses);
     }
 
     public function classes_allowed()
     {
         $schema = $this->init_schema();
         if (!$schema) {
             return false;
         }
 
         $list    = $schema->getAll('objectclasses');
         $classes = array();
 
         foreach ($list as $class) {
             $classes[] = $class['name'];
         }
 
         return $classes;
     }
 
     /**
      * Bind connection with DN and password
      *
      * @param string $dn   Bind DN
      * @param string $pass Bind password
      *
      * @return boolean True on success, False on error
      */
     public function bind($bind_dn, $bind_pw)
     {
         if (!$this->conn) {
             return false;
         }
 
         if ($bind_dn == $this->_current_bind_dn) {
             return true;
         }
 
         $this->_debug("C: Bind [dn: $bind_dn]");
 
         if (@ldap_bind($this->conn, $bind_dn, $bind_pw)) {
             $this->_debug("S: OK");
             $this->_current_bind_dn = $bind_dn;
             $this->_current_bind_pw = $bind_pw;
 
             return true;
         }
 
         $this->_debug("S: ".ldap_error($this->conn));
         $this->_error("LDAP: Bind failed for dn=$bind_dn. ".ldap_error($this->conn));
 
         return false;
     }
 
     /**
      * Close connection to LDAP server
      */
     public function close()
     {
         if ($this->conn) {
             $this->_debug("C: Close");
             ldap_unbind($this->conn);
 
             $this->_current_bind_dn = null;
             $this->_current_bind_pw = null;
             $this->conn             = null;
         }
     }
 
     /**
      * Get the value of a configuration item.
      *
      * @param string $key     Configuration key
      * @param mixed  $default Default value to return
      */
     public function config_get($key, $default = null)
     {
         if (!empty($this->_config_get_hook)) {
             return call_user_func_array($this->_config_get_hook, array($key, $value));
         }
         else if (method_exists($this, "config_get_{$key}")) {
             return call_user_func(array($this, "config_get_$key"), $value);
         }
         else if (!isset($this->config[$key])) {
             return $default;
         }
         else {
             return $this->config[$key];
         }
     }
 
     /**
      * Set a configuration item to value.
      *
      * @param string $key   Configuration key
      * @param mixed  $value Configuration value
      */
     public function config_set($key, $value = null)
     {
         if (is_array($key)) {
             foreach ($key as $k => $v) {
                 $this->config_set($k, $v);
             }
             return;
         }
 
         if (!empty($this->_config_set_hook)) {
             call_user_func($this->_config_set_hook, array($key, $value));
         }
         else if (method_exists($this, "config_set_{$key}")) {
             call_user_func_array(array($this, "config_set_$key"), array($value));
         }
         else if (property_exists($this, $key)) {
             $this->$key = $value;
         }
         else {
             // 'host' option is deprecated
             if ($key == 'host') {
                 $this->config['hosts'] = (array) $value;
             }
             else {
                 $this->config[$key] = $value;
             }
         }
     }
 
     /**
      * Establish a connection to the LDAP server
      */
     public function connect($host = null)
     {
         if (!function_exists('ldap_connect')) {
             $this->_error("No ldap support in this PHP installation");
             return false;
         }
 
         if (is_resource($this->conn)) {
             $this->_debug("Connection already exists");
             return true;
         }
 
         $hosts = !empty($host) ? $host : $this->config_get('hosts', array());
         $port  = $this->config_get('port', 389);
 
         foreach ((array) $hosts as $host) {
             $this->_debug("C: Connect [$host:$port]");
 
             if ($lc = @ldap_connect($host, $port)) {
                 if ($this->config_get('use_tls', false) === true) {
                     if (!ldap_start_tls($lc)) {
                         $this->_debug("S: Could not start TLS. " . ldap_error($lc));
                         continue;
                     }
                 }
 
                 $this->_debug("S: OK");
 
                 $ldap_version = $this->config_get('ldap_version', 3);
                 $timeout      = $this->config_get('network_timeout');
                 $referrals    = $this->config_get('referrals');
 
                 ldap_set_option($lc, LDAP_OPT_PROTOCOL_VERSION, $ldap_version);
 
                 if ($timeout) {
                     ldap_set_option($lc, LDAP_OPT_NETWORK_TIMEOUT, $timeout);
                 }
 
                 if ($referrals !== null) {
                     ldap_set_option($lc, LDAP_OPT_REFERRALS, (bool) $referrals);
                 }
 
                 $this->_current_host = $host;
                 $this->conn          = $lc;
 
                 break;
             }
 
             $this->_debug("S: NOT OK");
         }
 
         if (!is_resource($this->conn)) {
             $this->_error("Could not connect to LDAP");
             return false;
         }
 
         return true;
     }
 
     /**
      *   Shortcut to ldap_delete()
      */
     public function delete_entry($entry_dn)
     {
         $this->_debug("C: Delete $entry_dn");
 
         if (ldap_delete($this->conn, $entry_dn) === false) {
             $this->_debug("S: " . ldap_error($this->conn));
             $this->_warning("LDAP: Removing entry $entry_dn failed. " . ldap_error($this->conn));
             return false;
         }
 
         $this->_debug("S: OK");
 
         return true;
     }
 
     /**
      * Deletes specified entry and all entries in the tree
      */
     public function delete_entry_recursive($entry_dn)
     {
         // searching for sub entries, but not scope sub, just one level
         $result = $this->search($entry_dn, '(|(objectclass=*)(objectclass=ldapsubentry))', 'one');
 
         if ($result) {
             $entries = $result->entries(true);
 
             foreach (array_keys($entries) as $sub_dn) {
                 if (!$this->delete_entry_recursive($sub_dn)) {
                     return false;
                 }
             }
         }
 
         if (!$this->delete_entry($entry_dn)) {
             return false;
         }
 
         return true;
     }
 
     public function effective_rights($subject)
     {
         $effective_rights_control_oid = "1.3.6.1.4.1.42.2.27.9.5.2";
 
         $supported_controls = $this->supported_controls();
 
         if (!in_array($effective_rights_control_oid, $supported_controls)) {
             $this->_debug("LDAP: No getEffectiveRights control in supportedControls");
             return false;
         }
 
         $attributes = array(
             'attributeLevelRights' => array(),
             'entryLevelRights' => array(),
         );
 
         $entry_dn = $this->entry_dn($subject);
 
         if (!$entry_dn) {
             $entry_dn = $this->config_get($subject . "_base_dn");
         }
 
         if (!$entry_dn) {
             $entry_dn = $this->config_get("base_dn");
         }
 
         if (!$entry_dn) {
             $entry_dn = $this->config_get("root_dn");
         }
 
         $this->_debug("effective_rights for subject $subject resolves to entry dn $entry_dn");
 
         $moz_ldapsearch = "/usr/lib64/mozldap/ldapsearch";
         if (!is_file($moz_ldapsearch)) {
             $moz_ldapsearch = "/usr/lib/mozldap/ldapsearch";
         }
         if (!is_file($moz_ldapsearch)) {
             $moz_ldapsearch = null;
         }
 
         if (empty($moz_ldapsearch)) {
             $this->_error("Mozilla LDAP C SDK binary ldapsearch not found, cannot get effective rights on subject $subject");
             return null;
         }
 
         $output = array();
         $command = Array(
                 $moz_ldapsearch,
                 '-x',
                 '-h',
                 $this->_current_host,
                 '-p',
                 $this->config_get('port', 389),
                 '-b',
                 escapeshellarg($entry_dn),
                 '-s',
                 'base',
                 '-D',
                 escapeshellarg($this->_current_bind_dn),
                 '-w',
                 escapeshellarg($this->_current_bind_pw)
             );
 
         if ($this->vendor_name() == "Oracle Corporation") {
             // For Oracle DSEE
             $command[] = "-J";
             $command[] = escapeshellarg(
                     implode(
                             ':',
                             Array(
                                     $effective_rights_control_oid,          // OID
                                     'true'                                  // Criticality
                                 )
                         )
                 );
             $command[] = "-c";
             $command[] = escapeshellarg(
                     'dn:' . $this->_current_bind_dn
                 );
 
         } else {
             // For 389 DS:
             $command[] = "-J";
             $command[] = escapeshellarg(
                     implode(
                             ':',
                             Array(
                                     $effective_rights_control_oid,          // OID
                                     'true',                                 // Criticality
                                     'dn:' . $this->_current_bind_dn         // User DN
                                 )
                         )
                 );
         }
 
         // For both
         $command[] = '"(objectclass=*)"';
         $command[] = '"*"';
 
         if ($this->vendor_name() == "Oracle Corporation") {
             // Oracle DSEE
             $command[] = 'aclRights';
         }
 
         // remove password from debug log
         $command_debug     = $command;
         $command_debug[13] = '*';
 
         $command       = implode(' ', $command);
         $command_debug = implode(' ', $command_debug);
 
         $this->_debug("LDAP: Executing command: $command_debug");
 
         exec($command, $output, $return_code);
 
         $this->_debug("LDAP: Command output:" . var_export($output, true));
         $this->_debug("Return code: " . $return_code);
 
         if ($return_code) {
             $this->_error("Command $moz_ldapsearch returned error code: $return_code");
             return null;
         }
 
         $lines = array();
         foreach ($output as $line_num => $line) {
             if (substr($line, 0, 1) == " ") {
                 $lines[count($lines)-1] .= trim($line);
             }
             else {
                 $lines[] = trim($line);
             }
         }
 
         if ($this->vendor_name() == "Oracle Corporation") {
             // Example for attribute level rights:
             // aclRights;attributeLevel;$attr:$right:$bool,$right:$bool
             // Example for entry level rights:
             // aclRights;entryLevel: add:1,delete:1,read:1,write:1,proxy:1
             foreach ($lines as $line) {
                 $line_components = explode(':', $line);
                 $attribute_name = explode(';', array_shift($line_components));
 
                 switch ($attribute_name[0]) {
                     case "aclRights":
                         $this->parse_aclrights($attributes, $line);
                         break;
                     case "dn":
                         $attributes[$attribute_name[0]] = trim(implode(';', $line_components));
                         break;
                     default:
                         break;
                 }
             }
 
         } else {
             foreach ($lines as $line) {
                 $line_components = explode(':', $line);
                 $attribute_name  = array_shift($line_components);
                 $attribute_value = trim(implode(':', $line_components));
 
                 switch ($attribute_name) {
                     case "attributeLevelRights":
                         $attributes[$attribute_name] = $this->parse_attribute_level_rights($attribute_value);
                         break;
                     case "dn":
                         $attributes[$attribute_name] = $attribute_value;
                         break;
                     case "entryLevelRights":
                         $attributes[$attribute_name] = $this->parse_entry_level_rights($attribute_value);
                         break;
                     default:
                         break;
                 }
             }
         }
 
         return $attributes;
     }
 
     /**
      * Resolve entry data to entry DN
      *
      * @param string $subject    Entry string (e.g. entry DN or unique attribute value)
      * @param array  $attributes Additional attributes
      * @param string $base_dn    Optional base DN
      *
      * @return string Entry DN string
      */
     public function entry_dn($subject, $attributes = array(), $base_dn = null)
     {
         $this->_debug("Net_LDAP3::entry_dn($subject)");
         $is_dn = ldap_explode_dn($subject, 1);
 
         if (is_array($is_dn) && array_key_exists("count", $is_dn) && $is_dn["count"] > 0) {
             $this->_debug("$subject is a dn");
             return $subject;
         }
 
         $this->_debug("$subject is not a dn");
 
         if (strlen($subject) < 32 || preg_match('/[^a-fA-F0-9-]/', $subject)) {
             $this->_debug("$subject is not a unique identifier");
             return;
         }
 
         $unique_attr = $this->config_get('unique_attribute', 'nsuniqueid');
 
         $this->_debug("Using unique_attribute " . var_export($unique_attr, true) . " at " . __FILE__ . ":" . __LINE__);
 
         $attributes  = array_merge(array($unique_attr => $subject), (array)$attributes);
         $subject     = $this->entry_find_by_attribute($attributes, $base_dn);
 
         if (!empty($subject)) {
             return key($subject);
         }
     }
 
     public function entry_find_by_attribute($attributes, $base_dn = null)
     {
         $this->_debug("Net_LDAP3::entry_find_by_attribute(\$attributes, \$base_dn) called with base_dn", $base_dn, "and attributes", $attributes);
 
         if (empty($attributes) || !is_array($attributes)) {
             return false;
         }
 
         if (empty($attributes[key($attributes)])) {
             return false;
         }
 
         $filter = count($attributes) ? "(&" : "";
 
         foreach ($attributes as $key => $value) {
             $filter .= "(" . $key . "=" . $value . ")";
         }
 
         $filter .= count($attributes) ? ")" : "";
 
         if (empty($base_dn)) {
             $base_dn = $this->config_get('root_dn');
             $this->_debug("Using base_dn from domain " . $this->domain . ": " . $base_dn);
         }
 
         $result = $this->search($base_dn, $filter, 'sub', array_keys($attributes));
 
         if ($result && $result->count() > 0) {
             $this->_debug("Results found: " . implode(', ', array_keys($result->entries(true))));
             return $result->entries(true);
         }
         else {
             $this->_debug("No result");
             return false;
         }
     }
 
     public function find_user_groups($member_dn)
     {
         $groups  = array();
         $root_dn = $this->config_get('root_dn');
 
         // TODO: Do not query for both, it's either one or the other
         $entries = $this->search($root_dn, "(|" .
             "(&(objectclass=groupofnames)(member=$member_dn))" .
             "(&(objectclass=groupofuniquenames)(uniquemember=$member_dn))" .
             ")"
         );
 
         if ($entries) {
             $groups = array_keys($entries->entries(true));
         }
 
         return $groups;
     }
 
     public function get_entry_attribute($subject_dn, $attribute)
     {
         $entry = $this->get_entry_attributes($subject_dn, (array)$attribute);
 
         return $entry[strtolower($attribute)];
     }
 
     public function get_entry_attributes($subject_dn, $attributes)
     {
         // @TODO: use get_entry?
         $result = $this->search($subject_dn, '(objectclass=*)', 'base', $attributes);
 
         if (!$result) {
             return array();
         }
 
         $entries  = $result->entries(true);
         $entry_dn = key($entries);
         $entry    = $entries[$entry_dn];
 
         return $entry;
     }
 
     /**
      * Get a specific LDAP entry, identified by its DN
      *
      * @param string $dn         Record identifier
      * @param array  $attributes Attributes to return
      *
      * @return array Hash array
      */
     public function get_entry($dn, $attributes = array())
     {
         $rec = null;
 
         if ($this->conn && $dn) {
             $this->_debug("C: Read [dn: $dn] [(objectclass=*)]");
 
             if ($ldap_result = @ldap_read($this->conn, $dn, '(objectclass=*)', $attributes)) {
                 $this->_debug("S: OK");
 
                 if ($entry = ldap_first_entry($this->conn, $ldap_result)) {
                     $rec = ldap_get_attributes($this->conn, $entry);
                 }
             }
             else {
                 $this->_debug("S: ".ldap_error($this->conn));
                 $this->_warning("LDAP: Failed to read $dn. " . ldap_error($this->conn));
             }
 
             if (!empty($rec)) {
                 $rec['dn'] = $dn; // Add in the dn for the entry.
             }
         }
 
         return $rec;
     }
 
     public function list_replicas()
     {
         $this->_debug("Finding replicas for this server.");
 
         // Search any host that is a replica for the current host
         $replica_hosts = $this->config_get('replica_hosts', array());
         $root_dn       = $this->config_get('config_root_dn');
 
         if (!empty($replica_hosts)) {
             return $replica_hosts;
         }
 
         $ldap = new Net_LDAP3($this->config);
         $ldap->connect();
         $ldap->bind($this->_current_bind_dn, $this->_current_bind_pw);
 
         $result = $ldap->search($root_dn, '(objectclass=nsds5replicationagreement)', 'sub', array('nsds5replicahost'));
 
         if (!$result) {
             $this->_debug("No replicas configured");
             return $replica_hosts;
         }
 
         $this->_debug("Replication agreements found: " . var_export($result->entries(true), true));
 
         foreach ($result->entries(true) as $dn => $attrs) {
             if (!in_array($attrs['nsds5replicahost'], $replica_hosts)) {
                 $replica_hosts[] = $attrs['nsds5replicahost'];
             }
         }
 
         // $replica_hosts now holds the IDs of servers we are currently NOT
         // connected to. We might need this later in order to set
         $this->_server_id_not = $replica_hosts;
 
         $this->_debug("So far, we have the following replicas: " . var_export($replica_hosts, true));
 
         $ldap->close();
 
         foreach ($replica_hosts as $replica_host) {
             $ldap->config_set('hosts', array($replica_host));
             $ldap->connect();
             $ldap->bind($this->_current_bind_dn, $this->_current_bind_pw);
 
             $result = $ldap->search($root_dn, '(objectclass=nsds5replicationagreement)', 'sub', array('nsds5replicahost'));
             if (!$result) {
                 $this->_debug("No replicas configured on $replica_host");
                 $ldap->close();
                 continue;
             }
 
             foreach ($result->entries(true) as $dn => $attrs) {
                 if (!in_array($attrs['nsds5replicahost'], $replica_hosts)) {
                     $replica_hosts[] = $attrs['nsds5replicahost'];
                 }
             }
 
             $ldap->close();
         }
 
         $this->config_set('replica_hosts', $replica_hosts);
 
         return $replica_hosts;
     }
 
     public function login($username, $password, $domain = null, &$attributes = null)
     {
         $this->_debug("Net_LDAP3::login($username,***,$domain)");
 
         $_bind_dn = $this->config_get('service_bind_dn');
         $_bind_pw = $this->config_get('service_bind_pw');
 
         if (empty($_bind_dn)) {
             $this->_debug("No valid service bind dn found.");
             return null;
         }
 
         if (empty($_bind_pw)) {
             $this->_debug("No valid service bind password found.");
             return null;
         }
 
         $bound = $this->bind($_bind_dn, $_bind_pw);
 
         if (!$bound) {
             $this->_debug("Could not bind with service bind credentials.");
             return null;
         }
 
         $entry_dn = $this->entry_dn($username);
 
         if (!empty($entry_dn)) {
             $bound = $this->bind($entry_dn, $password);
 
             if (!$bound) {
                 $this->_error("LDAP: Could not bind with " . $entry_dn);
                 return null;
             }
 
             // fetch user attributes if requested
             if (!empty($attributes)) {
                 $attributes = $this->get_entry($entry_dn, $attributes);
                 $attributes = self::normalize_entry($attributes, true);
             }
 
             return $entry_dn;
         }
 
         $base_dn = $this->config_get('root_dn');
 
         if (empty($base_dn)) {
             $this->_debug("Could not get a valid base dn to search.");
             return null;
         }
 
         $localpart = $username;
 
         if (empty($domain) ) {
             if (count(explode('@', $username)) > 1) {
                 $_parts    = explode('@', $username);
                 $localpart = $_parts[0];
                 $domain    = $_parts[1];
             }
             else {
                 $localpart = $username;
                 $domain    = '';
             }
         }
 
         $realm  = $domain;
         $filter = $this->config_get("login_filter", null);
 
         if (empty($filter)) {
             $filter = $this->config_get("filter", null);
         }
         if (empty($filter)) {
             $filter = "(&(|(mail=%s)(mail=%U@%d)(alias=%s)(alias=%U@%d)(uid=%s))(objectclass=inetorgperson))";
         }
 
         $this->_debug("Net::LDAP3::login() original filter: " . $filter);
 
         $replace_patterns = array(
             '/%s/' => $username,
             '/%d/' => $domain,
             '/%U/' => $localpart,
             '/%r/' => $realm
         );
 
         $filter = preg_replace(array_keys($replace_patterns), array_values($replace_patterns), $filter);
 
         $this->_debug("Net::LDAP3::login() actual filter: " . $filter);
 
         $result = $this->search($base_dn, $filter, 'sub', $attributes);
 
         if (!$result) {
             $this->_debug("Could not search $base_dn with $filter");
             return null;
         }
 
         if ($result->count() > 1) {
             $this->_debug("Multiple entries found.");
             return null;
         }
         else if ($result->count() < 1) {
             $this->_debug("No entries found.");
             return null;
         }
 
         $entries  = $result->entries(true);
         $entry_dn = key($entries);
 
         $bound = $this->bind($entry_dn, $password);
 
         if (!$bound) {
             $this->_debug("Could not bind with " . $entry_dn);
             return null;
         }
 
         // replace attributes list with key-value data
         if (!empty($attributes)) {
             $attributes = $entries[$entry_dn];
         }
 
         return $entry_dn;
     }
 
     public function list_group_members($dn, $entry = null, $recurse = true)
     {
         $this->_debug("Net_LDAP3::list_group_members($dn)");
 
         if (is_array($entry) && in_array('objectclass', $entry)) {
             if (!in_array(array('groupofnames', 'groupofuniquenames', 'groupofurls'), $entry['objectclass'])) {
                 $this->_debug("Called list_group_members on a non-group!");
                 return array();
             }
         }
         else {
             $entry = $this->get_entry($dn, array('member', 'uniquemember', 'memberurl', 'objectclass'));
 
             if (!$entry) {
                 return array();
             }
         }
 
         $group_members = array();
 
         foreach ((array)$entry['objectclass'] as $objectclass) {
             switch (strtolower($objectclass)) {
                 case "groupofnames":
                 case "kolabgroupofnames":
                     $group_members = array_merge($group_members, $this->list_group_member($dn, $entry['member'], $recurse));
                     break;
                 case "groupofuniquenames":
                 case "kolabgroupofuniquenames":
                     $group_members = array_merge($group_members, $this->list_group_uniquemember($dn, $entry['uniquemember'], $recurse));
                     break;
                 case "groupofurls":
                     $group_members = array_merge($group_members, $this->list_group_memberurl($dn, $entry['memberurl'], $recurse));
                     break;
             }
         }
 
         return array_values(array_filter($group_members));
     }
 
     public function modify_entry($subject_dn, $old_attrs, $new_attrs)
     {
         $this->_debug("OLD ATTRIBUTES", $old_attrs);
         $this->_debug("NEW ATTRIBUTES", $new_attrs);
 
         // TODO: Get $rdn_attr - we have type_id in $new_attrs
         $dn_components  = ldap_explode_dn($subject_dn, 0);
         $rdn_components = explode('=', $dn_components[0]);
         $rdn_attr       = $rdn_components[0];
 
         $this->_debug("Net_LDAP3::modify_entry() using rdn attribute: " . $rdn_attr);
 
         $mod_array = array(
             'add'       => array(), // For use with ldap_mod_add()
             'del'       => array(), // For use with ldap_mod_del()
             'replace'   => array(), // For use with ldap_mod_replace()
             'rename'    => array(), // For use with ldap_rename()
         );
 
         // This is me cheating. Remove this special attribute.
         if (array_key_exists('ou', $old_attrs) || array_key_exists('ou', $new_attrs)) {
             $old_ou = is_array($old_attrs['ou']) ? array_shift($old_attrs['ou']) : $old_attrs['ou'];
             $new_ou = is_array($new_attrs['ou']) ? array_shift($new_attrs['ou']) : $new_attrs['ou'];
             unset($old_attrs['ou']);
             unset($new_attrs['ou']);
         }
         else {
             $old_ou = null;
             $new_ou = null;
         }
 
         // Compare each attribute value of the old attrs with the corresponding value
         // in the new attrs, if any.
         foreach ($old_attrs as $attr => $old_attr_value) {
             if (is_array($old_attr_value)) {
                 if (count($old_attr_value) == 1) {
                     $old_attrs[$attr] = $old_attr_value[0];
                     $old_attr_value = $old_attrs[$attr];
                 }
             }
 
             if (array_key_exists($attr, $new_attrs)) {
                 if (is_array($new_attrs[$attr])) {
                     if (count($new_attrs[$attr]) == 1) {
                         $new_attrs[$attr] = $new_attrs[$attr][0];
                     }
                 }
 
                 if (is_array($old_attrs[$attr]) && is_array($new_attrs[$attr])) {
                     $_sort1 = $new_attrs[$attr];
                     sort($_sort1);
                     $_sort2 = $old_attr_value;
                     sort($_sort2);
                 }
                 else {
                     $_sort1 = true;
                     $_sort2 = false;
                 }
 
                 if ($new_attrs[$attr] !== $old_attr_value && $_sort1 !== $_sort2) {
                     $this->_debug("Attribute $attr changed from " . var_export($old_attr_value, true) . " to " . var_export($new_attrs[$attr], true));
                     if ($attr === $rdn_attr) {
                         $this->_debug("This attribute is the RDN attribute. Let's see if it is multi-valued, and if the original still exists in the new value.");
                         if (is_array($old_attrs[$attr])) {
                             if (!is_array($new_attrs[$attr])) {
                                 if (in_array($new_attrs[$attr], $old_attrs[$attr])) {
                                     // TODO: Need to remove all $old_attrs[$attr] values not equal to $new_attrs[$attr], and not equal to the current $rdn_attr value [0]
 
                                     $this->_debug("old attrs. is array, new attrs. is not array. new attr. exists in old attrs.");
 
                                     $rdn_attr_value  = array_shift($old_attrs[$attr]);
                                     $_attr_to_remove = array();
 
                                     foreach ($old_attrs[$attr] as $value) {
                                         if (strtolower($value) != strtolower($new_attrs[$attr])) {
                                             $_attr_to_remove[] = $value;
                                         }
                                     }
 
                                     $this->_debug("Adding to delete attribute $attr values:" . implode(', ', $_attr_to_remove));
 
                                     $mod_array['del'][$attr] = $_attr_to_remove;
 
                                     if (strtolower($new_attrs[$attr]) !== strtolower($rdn_attr_value)) {
                                         $this->_debug("new attrs is not the same as the old rdn value, issuing a rename");
                                         $mod_array['rename']['dn']      = $subject_dn;
                                         $mod_array['rename']['new_rdn'] = $rdn_attr . '=' . self::quote_string($new_attrs[$attr], true);
                                     }
                                 }
                                 else {
                                     $this->_debug("new attrs is not the same as any of the old rdn value, issuing a full rename");
                                     $mod_array['rename']['dn']      = $subject_dn;
                                     $mod_array['rename']['new_rdn'] = $rdn_attr . '=' . self::quote_string($new_attrs[$attr], true);
                                 }
                             }
                             else {
                                 // TODO: See if the rdn attr. value is still in $new_attrs[$attr]
                                 if (in_array($old_attrs[$attr][0], $new_attrs[$attr])) {
                                     $this->_debug("Simply replacing attr $attr as rdn attr value is preserved.");
                                     $mod_array['replace'][$attr] = $new_attrs[$attr];
                                 }
                                 else {
                                     // TODO: This fails.
                                     $mod_array['rename']['dn']      = $subject_dn;
                                     $mod_array['rename']['new_rdn'] = $rdn_attr . '=' . self::quote_string($new_attrs[$attr][0], true);
                                     $mod_array['del'][$attr]        = $old_attrs[$attr][0];
                                 }
                             }
                         }
                         else {
                             if (!is_array($new_attrs[$attr])) {
                                 $this->_debug("Renaming " . $old_attrs[$attr] . " to " . $new_attrs[$attr]);
                                 $mod_array['rename']['dn']      = $subject_dn;
                                 $mod_array['rename']['new_rdn'] = $rdn_attr . '=' . self::quote_string($new_attrs[$attr], true);
                             }
                             else {
                                 $this->_debug("Adding to replace");
                                 // An additional attribute value is being supplied. Just replace and continue.
                                 $mod_array['replace'][$attr] = $new_attrs[$attr];
                                 continue;
                             }
                         }
                     }
                     else {
                         if (!isset($new_attrs[$attr]) || $new_attrs[$attr] === '' || (is_array($new_attrs[$attr]) && empty($new_attrs[$attr]))) {
                             switch ($attr) {
                                 case "userpassword":
                                     break;
                                 default:
                                     $this->_debug("Adding to del: $attr");
                                     $mod_array['del'][$attr] = (array)($old_attr_value);
                                     break;
                             }
                         }
                         else {
                             $this->_debug("Adding to replace: $attr");
                             $mod_array['replace'][$attr] = (array)($new_attrs[$attr]);
                         }
                     }
                 }
                 else {
                     $this->_debug("Attribute $attr unchanged");
                 }
             }
             else {
                 // TODO: Since we're not shipping the entire object back and forth, and only post
                 // part of the data... we don't know what is actually removed (think modifiedtimestamp, etc.)
                 $this->_debug("Group attribute $attr not mentioned in \$new_attrs..., but not explicitly removed... by assumption");
             }
         }
 
         foreach ($new_attrs as $attr => $value) {
             // OU's parent base dn
             if ($attr == 'base_dn') {
                 continue;
             }
 
             if (is_array($value)) {
                 if (count($value) == 1) {
                     $new_attrs[$attr] = $value[0];
                     $value = $new_attrs[$attr];
                 }
             }
 
             if (array_key_exists($attr, $old_attrs)) {
                 if (is_array($old_attrs[$attr])) {
                     if (count($old_attrs[$attr]) == 1) {
                         $old_attrs[$attr] = $old_attrs[$attr][0];
                     }
                 }
 
                 if (is_array($new_attrs[$attr]) && is_array($old_attrs[$attr])) {
                     $_sort1 = $old_attrs[$attr];
                     sort($_sort1);
                     $_sort2 = $value;
                     sort($_sort2);
                 }
                 else {
                     $_sort1 = true;
                     $_sort2 = false;
                 }
 
                 if ($value === null || $value === '' || (is_array($value) && empty($value))) {
                     if (!array_key_exists($attr, $mod_array['del'])) {
                         switch ($attr) {
                             case 'userpassword':
                                 break;
                             default:
                                 $this->_debug("Adding to del(2): $attr");
                                 $mod_array['del'][$attr] = (array)($old_attrs[$attr]);
                                 break;
                         }
                     }
                 }
                 else {
                     if (!($old_attrs[$attr] === $value) && !($attr === $rdn_attr) && !($_sort1 === $_sort2)) {
                         if (!array_key_exists($attr, $mod_array['replace'])) {
                             $this->_debug("Adding to replace(2): $attr");
                             $mod_array['replace'][$attr] = $value;
                         }
                     }
                 }
             }
             else {
                 if (!empty($value)) {
                     $mod_array['add'][$attr] = $value;
                 }
             }
         }
 
         if (empty($old_ou)) {
             $subject_dn_components = ldap_explode_dn($subject_dn, 0);
             unset($subject_dn_components["count"]);
             $subject_rdn = array_shift($subject_dn_components);
             $old_ou      = implode(',', $subject_dn_components);
         }
 
         $subject_dn = self::unified_dn($subject_dn);
         $prefix     = self::unified_dn('ou=' . $old_ou) . ',';
 
         // object is an organizational unit
         if (strpos($subject_dn, $prefix) === 0) {
             $root = substr($subject_dn, strlen($prefix)); // remove ou=*,
 
             if ((!empty($new_attrs['base_dn']) && strtolower($new_attrs['base_dn']) !== strtolower($root))
                 || (strtolower($old_ou) !== strtolower($new_ou))
             ) {
                 if (!empty($new_attrs['base_dn'])) {
                     $root = $new_attrs['base_dn'];
                 }
 
                 $mod_array['rename']['new_parent'] = $root;
                 $mod_array['rename']['dn']         = $subject_dn;
                 $mod_array['rename']['new_rdn']    = 'ou=' . self::quote_string($new_ou, true);
             }
         }
         // not OU object, but changed ou attribute
         else if (!empty($old_ou) && !empty($new_ou)) {
             // unify DN strings for comparison
             $old_ou = self::unified_dn($old_ou);
             $new_ou = self::unified_dn($new_ou);
 
             if (strtolower($old_ou) !== strtolower($new_ou)) {
                 $mod_array['rename']['new_parent'] = $new_ou;
                 if (empty($mod_array['rename']['dn']) || empty($mod_array['rename']['new_rdn'])) {
                     $rdn_attr_value = self::quote_string($new_attrs[$rdn_attr], true);
                     $mod_array['rename']['dn']      = $subject_dn;
                     $mod_array['rename']['new_rdn'] = $rdn_attr . '=' . $rdn_attr_value;
                 }
             }
         }
 
         $this->_debug($mod_array);
 
         $result = $this->modify_entry_attributes($subject_dn, $mod_array);
 
         if ($result) {
             return $mod_array;
         }
     }
 
     /**
      * Bind connection with (SASL-) user and password
      *
      * @param string $authc Authentication user
      * @param string $pass  Bind password
      * @param string $authz Autorization user
      *
      * @return boolean True on success, False on error
      */
-    public function sasl_bind($authc, $pass, $authz=null)
+    public function sasl_bind($authc = '', $pass = '', $authz = null)
     {
         if (!$this->conn) {
             return false;
         }
 
         if (!function_exists('ldap_sasl_bind')) {
             $this->_error("LDAP: Unable to bind. ldap_sasl_bind() not exists");
             return false;
         }
 
         if (!empty($authz)) {
             $authz = 'u:' . $authz;
         }
 
+        $gssapi = $this->config_get('gssapi_cn');
         $method = $this->config_get('auth_method');
+
         if (empty($method)) {
             $method = 'DIGEST-MD5';
         }
 
-        $this->_debug("C: Bind [mech: $method, authc: $authc, authz: $authz]");
+        if ($gssapi && strncasecmp($method, 'GSSAPI', 6) == 0) {
+            putenv("KRB5CCNAME=$gssapi");
+        }
+
+        $this->_debug("C: Bind [mech: $method, authc: $authc, authz: $authz, gssapi: $gssapi]");
 
         if (ldap_sasl_bind($this->conn, null, $pass, $method, null, $authc, $authz)) {
             $this->_debug("S: OK");
             return true;
         }
 
         $this->_debug("S: ".ldap_error($this->conn));
         $this->_error("LDAP: Bind failed for authcid=$authc. ".ldap_error($this->conn));
 
         return false;
     }
 
     /**
      * Execute LDAP search
      *
      * @param string $base_dn    Base DN to use for searching
      * @param string $filter     Filter string to query
      * @param string $scope      The LDAP scope (list|sub|base)
      * @param array  $attrs      List of entry attributes to read
      * @param array  $prop       Hash array with query configuration properties:
      *   - sort:   array of sort attributes (has to be in sync with the VLV index)
      *   - search: search string used for VLV controls
      * @param bool   $count_only Set to true if only entry count is requested
      *
      * @return mixed Net_LDAP3_Result object or number of entries (if $count_only=true) or False on failure
      */
     public function search($base_dn, $filter = '(objectclass=*)', $scope = 'sub', $attrs = array('dn'), $props = array(), $count_only = false)
     {
         if (!$this->conn) {
             $this->_debug("No active connection for " . __CLASS__ . "::" . __FUNCTION__);
             return false;
         }
 
         // make sure attributes list is not empty
         if (empty($attrs)) {
             $attrs = array('dn');
         }
         // make sure filter is not empty
         if (empty($filter)) {
             $filter = '(objectclass=*)';
         }
 
         $this->_debug("C: Search base dn: [$base_dn] scope [$scope] with filter [$filter]");
 
         $function = self::scope_to_function($scope, $ns_function);
 
         if (!$count_only && ($sort = $this->find_vlv($base_dn, $filter, $scope, $props['sort']))) {
             // when using VLV, we get the total count by...
             // ...either reading numSubOrdinates attribute
             if (($sub_filter = $this->config_get('numsub_filter')) &&
                 ($result_count = @$ns_function($this->conn, $base_dn, $sub_filter, array('numSubOrdinates'), 0, 0, 0))
             ) {
                 $counts = ldap_get_entries($this->conn, $result_count);
                 for ($vlv_count = $j = 0; $j < $counts['count']; $j++) {
                     $vlv_count += $counts[$j]['numsubordinates'][0];
                 }
                 $this->_debug("D: total numsubordinates = " . $vlv_count);
             }
             // ...or by fetching all records dn and count them
             else if (!function_exists('ldap_parse_virtuallist_control')) {
                 // @FIXME: this search will ignore $props['search']
                 $vlv_count = $this->search($base_dn, $filter, $scope, array('dn'), $props, true);
             }
 
             $this->vlv_active = $this->_vlv_set_controls($sort, $this->list_page, $this->page_size,
                 $this->_vlv_search($sort, $props['search']));
         }
         else {
             $this->vlv_active = false;
         }
 
         $sizelimit = (int) $this->config['sizelimit'];
         $timelimit = (int) $this->config['timelimit'];
         $phplimit  = (int) @ini_get('max_execution_time');
 
         // set LDAP time limit to be (one second) less than PHP time limit
         // otherwise we have no chance to log the error below
         if ($phplimit && $timelimit >= $phplimit) {
             $timelimit = $phplimit - 1;
         }
 
         $this->_debug("Using function $function on scope $scope (\$ns_function is $ns_function)");
 
         if ($this->vlv_active) {
             if (!empty($this->additional_filter)) {
                 $filter = "(&" . $filter . $this->additional_filter . ")";
                 $this->_debug("C: (With VLV) Setting a filter (with additional filter) of " . $filter);
             }
             else {
                 $this->_debug("C: (With VLV) Setting a filter (without additional filter) of " . $filter);
             }
         }
         else {
             if (!empty($this->additional_filter)) {
                 $filter = "(&" . $filter . $this->additional_filter . ")";
             }
             $this->_debug("C: (Without VLV) Setting a filter of " . $filter);
         }
 
         $this->_debug("Executing search with return attributes: " . var_export($attrs, true));
 
         $ldap_result = @$function($this->conn, $base_dn, $filter, $attrs, 0, $sizelimit, $timelimit);
 
         if (!$ldap_result) {
             $this->_warning("LDAP: $function failed for dn=$base_dn. " . ldap_error($this->conn));
             return false;
         }
 
         // when running on a patched PHP we can use the extended functions
         // to retrieve the total count from the LDAP search result
         if ($this->vlv_active && function_exists('ldap_parse_virtuallist_control')) {
             if (ldap_parse_result($this->conn, $ldap_result, $errcode, $matcheddn, $errmsg, $referrals, $serverctrls)) {
                 ldap_parse_virtuallist_control($this->conn, $serverctrls, $last_offset, $vlv_count, $vresult);
                 $this->_debug("S: VLV result: last_offset=$last_offset; content_count=$vlv_count");
             }
             else {
                 $this->_debug("S: ".($errmsg ? $errmsg : ldap_error($this->conn)));
             }
         }
         else {
             $this->_debug("S: ".ldap_count_entries($this->conn, $ldap_result)." record(s) found");
         }
 
         $result = new Net_LDAP3_Result($this->conn, $base_dn, $filter, $scope, $ldap_result);
 
         if (isset($last_offset)) {
             $result->set('offset', $last_offset);
         }
         if (isset($vlv_count)) {
             $result->set('count', $vlv_count);
         }
 
         $result->set('vlv', $this->vlv_active);
 
         return $count_only ? $result->count() : $result;
     }
 
     /**
      * Similar to Net_LDAP3::search() but using a search array with multiple
      * keys and values that to continue to use the VLV but with an original
      * filter adding the search stuff to an additional filter.
      *
      * @see Net_LDAP3::search()
      */
     public function search_entries($base_dn, $filter = '(objectclass=*)', $scope = 'sub', $attrs = array('dn'), $props = array())
     {
         $this->_debug("Net_LDAP3::search_entries with search " . var_export($props, true));
 
         if (is_array($props['search']) && array_key_exists('params', $props['search'])) {
             $_search = $this->search_filter($props['search']);
             $this->_debug("C: Search filter: $_search");
 
             if (!empty($_search)) {
                 $this->additional_filter = $_search;
             }
             else {
                 $this->additional_filter = "(|";
 
                 foreach ($props['search'] as $attr => $value) {
                     $this->additional_filter .= "(" . $attr . "=" . $this->_fuzzy_search_prefix() . $value . $this->_fuzzy_search_suffix() . ")";
                 }
 
                 $this->additional_filter .= ")";
             }
 
             $this->_debug("C: Setting an additional filter " . $this->additional_filter);
         }
 
         $search = $this->search($base_dn, $filter, $scope, $attrs, $props);
 
         $this->additional_filter = null;
 
         if (!$search) {
             $this->_debug("Net_LDAP3: Search did not succeed!");
             return false;
         }
 
         return $search;
     }
 
     /**
      * Create LDAP search filter string according to defined parameters.
      */
     public function search_filter($search)
     {
         if (empty($search) || !is_array($search) || empty($search['params'])) {
             return null;
         }
 
         $operators = array('=', '~=', '>=', '<=');
         $filter    = '';
 
         foreach ((array) $search['params'] as $field => $param) {
             $value = (array) $param['value'];
 
             switch ((string)$param['type']) {
                 case 'prefix':
                     $prefix = '';
                     $suffix = '*';
                     break;
 
                 case 'suffix':
                     $prefix = '*';
                     $suffix = '';
                     break;
 
                 case 'exact':
                 case '=':
                 case '~=':
                 case '>=':
                 case '<=':
                     $prefix = '';
                     $suffix = '';
 
                     // this is a common query to find entry by DN, make sure
                     // it is a unified DN so special characters are handled correctly
                     if ($field == 'entrydn') {
                         $value = array_map(array('Net_LDAP3', 'unified_dn'), $value);
                     }
 
                     break;
 
                 case 'exists':
                     $prefix = '*';
                     $suffix = '';
                     $param['value'] = '';
                     break;
 
                 case 'both':
                 default:
                     $prefix = '*';
                     $suffix = '*';
                     break;
             }
 
             $operator = $param['type'] && in_array($param['type'], $operators) ? $param['type'] : '=';
 
             if (count($value) < 2) {
                 $value = array_pop($value);
             }
 
             if (is_array($value)) {
                 $val_filter = array();
                 foreach ($value as $val) {
                     $val          = self::quote_string($val);
                     $val_filter[] = "(" . $field . $operator . $prefix . $val . $suffix . ")";
                 }
                 $filter .= "(|" . implode($val_filter, '') . ")";
             }
             else {
                 $value = self::quote_string($value);
                 $filter .= "(" . $field . $operator . $prefix . $value . $suffix . ")";
             }
         }
 
         // join search parameters with specified operator ('OR' or 'AND')
         if (count($search['params']) > 1) {
             $filter = '(' . ($search['operator'] == 'AND' ? '&' : '|') . $filter . ')';
         }
 
         return $filter;
     }
 
     /**
      * Set properties for VLV-based paging
      *
      * @param number $page Page number to list (starting at 1)
      * @param number $size Number of entries to display on one page
      */
     public function set_vlv_page($page, $size = 10)
     {
         $this->list_page = $page;
         $this->page_size = $size;
     }
 
     /**
      * Turn an LDAP entry into a regular PHP array with attributes as keys.
      *
      * @param array $entry Attributes array as retrieved from ldap_get_attributes() or ldap_get_entries()
      * @param bool  $flat  Convert one-element-array values into strings
      *
      * @return array Hash array with attributes as keys
      */
     public static function normalize_entry($entry, $flat = false)
     {
         $rec = array();
         for ($i=0; $i < $entry['count']; $i++) {
             $attr = $entry[$i];
             for ($j=0; $j < $entry[$attr]['count']; $j++) {
                 $rec[$attr][$j] = $entry[$attr][$j];
             }
 
             if ($flat && count($rec[$attr]) == 1) {
                 $rec[$attr] = $rec[$attr][0];
             }
         }
 
         return $rec;
     }
 
     /**
      * Normalize a ldap result by converting entry attribute arrays into single values
      */
     public static function normalize_result($_result)
     {
         if (!is_array($_result)) {
             return array();
         }
 
         $result = array();
 
         for ($x = 0; $x < $_result['count']; $x++) {
             $dn    = $_result[$x]['dn'];
             $entry = self::normalize_entry($_result[$x], true);
 
             if (!empty($entry['objectclass'])) {
                 if (is_array($entry['objectclass'])) {
                     $entry['objectclass'] = array_map('strtolower', $entry['objectclass']);
                 }
                 else {
                     $entry['objectclass'] = strtolower($entry['objectclass']);
                 }
             }
 
             $result[$dn] = $entry;
         }
 
         return $result;
     }
 
     public static function scopeint2str($scope)
     {
         switch ($scope) {
             case 2:
                 return 'sub';
 
             case 1:
                 return 'one';
 
             case 0:
                 return 'base';
 
             default:
                 $this->_debug("Scope $scope is not a valid scope integer");
         }
     }
 
     /**
      * Choose the right PHP function according to scope property
      *
      * @param string $scope         The LDAP scope (sub|base|list)
      * @param string $ns_function   Function to be used for numSubOrdinates queries
      * @return string  PHP function to be used to query directory
      */
     public static function scope_to_function($scope, &$ns_function = null)
     {
         switch ($scope) {
             case 'sub':
                 $function = $ns_function = 'ldap_search';
                 break;
             case 'base':
                 $function = $ns_function = 'ldap_read';
                 break;
             case 'one':
             case 'list':
             default:
                 $function    = 'ldap_list';
                 $ns_function = 'ldap_read';
                 break;
         }
 
         return $function;
     }
 
     private function config_set_config_get_hook($callback)
     {
         $this->_config_get_hook = $callback;
     }
 
     private function config_set_config_set_hook($callback)
     {
         $this->_config_set_hook = $callback;
     }
 
     /**
      * Sets the debug level both for this class and the ldap connection.
      */
     private function config_set_debug($value)
     {
         $this->config['debug'] = (bool) $value;
         ldap_set_option(null, LDAP_OPT_DEBUG_LEVEL, (int) $value);
     }
 
     /**
      *  Sets a log hook that is called with every log message in this module.
      */
     private function config_set_log_hook($callback)
     {
         $this->_log_hook = $callback;
     }
 
     /**
      * Find a matching VLV
      */
     protected function find_vlv($base_dn, $filter, $scope, $sort_attrs = null)
     {
         if ($scope == 'base') {
             return false;
         }
 
         $vlv_indexes = $this->find_vlv_indexes_and_searches();
 
         if (empty($vlv_indexes)) {
             return false;
         }
 
         $this->_debug("Existing vlv index and search information", $vlv_indexes);
 
         $filter  = strtolower($filter);
         $base_dn = self::unified_dn($base_dn);
 
         foreach ($vlv_indexes as $vlv_index) {
             if (!empty($vlv_index[$base_dn])) {
                 $this->_debug("Found a VLV for base_dn: " . $base_dn);
                 if ($vlv_index[$base_dn]['filter'] == $filter) {
                     if ($vlv_index[$base_dn]['scope'] == $scope) {
                         $this->_debug("Scope and filter matches");
 
                         // Not passing any sort attributes means you don't care
                         if (!empty($sort_attrs)) {
                             $sort_attrs = array_map('strtolower', (array) $sort_attrs);
 
                             foreach ($vlv_index[$base_dn]['sort'] as $sss_config) {
                                 $sss_config = array_map('strtolower', $sss_config);
                                 if (count(array_intersect($sort_attrs, $sss_config)) == count($sort_attrs)) {
                                     $this->_debug("Sorting matches");
 
                                     return $sort_attrs;
                                 }
                             }
 
                             $this->_debug("Sorting does not match");
                         }
                         else {
                             $sort = array_filter((array) $vlv_index[$base_dn]['sort'][0]);
                             $this->_debug("Sorting unimportant");
 
                             return $sort;
                         }
                     }
                     else {
                         $this->_debug("Scope does not match");
                     }
                 }
                 else {
                     $this->_debug("Filter does not match");
                 }
             }
         }
 
         return false;
     }
 
     /**
      * Return VLV indexes and searches including necessary configuration
      * details.
      */
     protected function find_vlv_indexes_and_searches()
     {
         // Use of Virtual List View control has been specifically disabled.
         if ($this->config['vlv'] === false) {
             return false;
         }
 
         // Virtual List View control has been configured in kolab.conf, for example;
         //
         // [ldap]
         // vlv = [
         //         {
         //                 'ou=People,dc=example,dc=org': {
         //                         'scope': 'sub',
         //                         'filter': '(objectclass=inetorgperson)',
         //                         'sort' : [
         //                                 [
         //                                         'displayname',
         //                                         'sn',
         //                                         'givenname',
         //                                         'cn'
         //                                     ]
         //                             ]
         //                     }
         //             },
         //         {
         //                 'ou=Groups,dc=example,dc=org': {
         //                         'scope': 'sub',
         //                         'filter': '(objectclass=groupofuniquenames)',
         //                         'sort' : [
         //                                 [
         //                                         'cn'
         //                                     ]
         //                             ]
         //                     }
         //             },
         //     ]
         //
         if (is_array($this->config['vlv'])) {
             return $this->config['vlv'];
         }
 
         // We have done this dance before.
         if ($this->_vlv_indexes_and_searches !== null) {
             return $this->_vlv_indexes_and_searches;
         }
 
         $this->_vlv_indexes_and_searches = array();
 
         $config_root_dn = $this->config_get('config_root_dn');
 
         if (empty($config_root_dn)) {
             return array();
         }
 
         if ($cached_config = $this->get_cache_data('vlvconfig')) {
             $this->_vlv_indexes_and_searches = $cached_config;
             return $this->_vlv_indexes_and_searches;
         }
 
         $this->_debug("No VLV information available yet, refreshing");
 
         $search_filter = '(objectclass=vlvsearch)';
         $search_result = ldap_search($this->conn, $config_root_dn, $search_filter, array('*'), 0, 0, 0);
 
         if ($search_result === false) {
             $this->_debug("Search for '$search_filter' on '$config_root_dn' failed:".ldap_error($this->conn));
             return;
         }
 
         $vlv_searches = new Net_LDAP3_Result($this->conn, $config_root_dn, $search_filter, 'sub', $search_result);
 
         if ($vlv_searches->count() < 1) {
             $this->_debug("Empty result from search for '(objectclass=vlvsearch)' on '$config_root_dn'");
             return;
         }
 
         $index_filter = '(objectclass=vlvindex)';
 
         foreach ($vlv_searches->entries(true) as $vlv_search_dn => $vlv_search_attrs) {
             // The attributes we are interested in are as follows:
             $_vlv_base_dn = self::unified_dn($vlv_search_attrs['vlvbase']);
             $_vlv_scope   = $vlv_search_attrs['vlvscope'];
             $_vlv_filter  = $vlv_search_attrs['vlvfilter'];
 
             // Multiple indexes may exist
             $index_result = ldap_search($this->conn, $vlv_search_dn, $index_filter, array('*'), 0, 0, 0);
 
             if ($index_result === false) {
                 $this->_debug("Search for '$index_filter' on '$vlv_search_dn' failed:".ldap_error($this->conn));
                 continue;
             }
 
             $vlv_indexes = new Net_LDAP3_Result($this->conn, $vlv_search_dn, $index_filter, 'sub', $index_result);
             $vlv_indexes = $vlv_indexes->entries(true);
 
             // Reset this one for each VLV search.
             $_vlv_sort = array();
 
             foreach ($vlv_indexes as $vlv_index_dn => $vlv_index_attrs) {
                 $_vlv_sort[] = explode(' ', trim($vlv_index_attrs['vlvsort']));
             }
 
             $this->_vlv_indexes_and_searches[] = array(
                     $_vlv_base_dn => array(
                             'scope'  => self::scopeint2str($_vlv_scope),
                             'filter' => strtolower($_vlv_filter),
                             'sort'   => $_vlv_sort,
                         ),
                 );
         }
 
         // cache this
         $this->set_cache_data('vlvconfig', $this->_vlv_indexes_and_searches);
 
         return $this->_vlv_indexes_and_searches;
     }
 
     private function init_schema()
     {
         // use PEAR include if autoloading failed
         if (!class_exists('Net_LDAP2')) {
             require_once('Net/LDAP2.php');
         }
 
         $port = $this->config_get('port', 389);
         $tls  = $this->config_get('use_tls', false);
 
         foreach ((array) $this->config_get('hosts') as $host) {
             $this->_debug("C: Connect [$host:$port]");
 
             $_ldap_cfg = array(
                 'host'   => $host,
                 'port'   => $port,
                 'tls'    => $tls,
                 'version' => 3,
                 'binddn' => $this->config_get('service_bind_dn'),
                 'bindpw' => $this->config_get('service_bind_pw')
             );
 
             $_ldap_schema_cache_cfg = array(
                 'path' => "/tmp/" . $host . ":" . ($port ? $port : '389') . "-Net_LDAP2_Schema.cache",
                 'max_age' => 86400,
             );
 
             $_ldap = Net_LDAP2::connect($_ldap_cfg);
 
             if (!is_a($_ldap, 'Net_LDAP2_Error')) {
                 $this->_debug("S: OK");
                 break;
             }
 
             $this->_debug("S: NOT OK");
             $this->_debug($_ldap->getMessage());
         }
 
         if (is_a($_ldap, 'Net_LDAP2_Error')) {
             return null;
         }
 
         $_ldap_schema_cache = new Net_LDAP2_SimpleFileSchemaCache($_ldap_schema_cache_cfg);
 
         $_ldap->registerSchemaCache($_ldap_schema_cache);
 
         // TODO: We should learn what LDAP tech. we're running against.
         // Perhaps with a scope base objectclass recognize rootdse entry
         $schema_root_dn = $this->config_get('schema_root_dn');
 
         if (!$schema_root_dn) {
             $_schema = $_ldap->schema();
         }
 
         return $_schema;
     }
 
     private function list_group_member($dn, $members, $recurse = true)
     {
         $this->_debug("Net_LDAP3::list_group_member($dn)");
 
         $members       = (array) $members;
         $group_members = array();
 
         // remove possible 'count' item
         unset($members['count']);
 
         // Use the member attributes to return an array of member ldap objects
         // NOTE that the member attribute is supposed to contain a DN
         foreach ($members as $member) {
             $member_entry = $this->get_entry($member, array('member', 'uniquemember', 'memberurl', 'objectclass'));
 
             if (empty($member_entry)) {
                 continue;
             }
 
             $group_members[$member] = $member;
 
             if ($recurse) {
                 // Nested groups
                 $group_group_members = $this->list_group_members($member, $member_entry);
                 if ($group_group_members) {
                     $group_members = array_merge($group_group_members, $group_members);
                 }
             }
         }
 
         return array_filter($group_members);
     }
 
     private function list_group_uniquemember($dn, $uniquemembers, $recurse = true)
     {
         $this->_debug("Net_LDAP3::list_group_uniquemember($dn)", $entry);
 
         $uniquemembers = (array)($uniquemembers);
         $group_members = array();
 
         // remove possible 'count' item
         unset($uniquemembers['count']);
 
         foreach ($uniquemembers as $member) {
             $member_entry = $this->get_entry($member, array('member', 'uniquemember', 'memberurl', 'objectclass'));
 
             if (empty($member_entry)) {
                 continue;
             }
 
             $group_members[$member] = $member;
 
             if ($recurse) {
                 // Nested groups
                 $group_group_members = $this->list_group_members($member, $member_entry);
                 if ($group_group_members) {
                     $group_members = array_merge($group_group_members, $group_members);
                 }
             }
         }
 
         return array_filter($group_members);
     }
 
     private function list_group_memberurl($dn, $memberurls, $recurse = true)
     {
         $this->_debug("Net_LDAP3::list_group_memberurl($dn)");
 
         $group_members = array();
         $memberurls    = (array) $memberurls;
         $attributes    = array('member', 'uniquemember', 'memberurl', 'objectclass');
 
         // remove possible 'count' item
         unset($memberurls['count']);
 
         foreach ($memberurls as $url) {
             $ldap_uri = $this->parse_memberurl($url);
             $result   = $this->search($ldap_uri[3], $ldap_uri[6], 'sub', $attributes);
 
             if (!$result) {
                 continue;
             }
 
             foreach ($result->entries(true) as $entry_dn => $_entry) {
                 $group_members[$entry_dn] = $entry_dn;
                 $this->_debug("Found " . $entry_dn);
 
                 if ($recurse) {
                     // Nested group
                     $group_group_members = $this->list_group_members($entry_dn, $_entry);
                     if ($group_group_members) {
                         $group_members = array_merge($group_members, $group_group_members);
                     }
                 }
             }
         }
 
         return array_filter($group_members);
     }
 
     /**
      * memberUrl attribute parser
      *
      * @param string $url URL string
      *
      * @return array URL elements
      */
     private function parse_memberurl($url)
     {
         preg_match('/(.*):\/\/(.*)\/(.*)\?(.*)\?(.*)\?(.*)/', $url, $matches);
         return $matches;
     }
 
     private function modify_entry_attributes($subject_dn, $attributes)
     {
         if (is_array($attributes['rename']) && !empty($attributes['rename'])) {
             $olddn      = $attributes['rename']['dn'];
             $newrdn     = $attributes['rename']['new_rdn'];
             $new_parent = $attributes['rename']['new_parent'];
 
             $this->_debug("C: Rename $olddn to $newrdn,$new_parent");
 
             // Note: for some reason the operation fails if RDN contains special characters
             // and last argument of ldap_rename() is set to TRUE. That's why we use FALSE.
             // However, we need to modify RDN attribute value later, otherwise it
             // will contain an array of previous and current values
             for ($i = 1; $i >= 0; $i--) {
                 $result = ldap_rename($this->conn, $olddn, $newrdn, $new_parent, $i == 1);
                 if ($result) {
                     break;
                 }
             }
 
             if ($result) {
                 $this->_debug("S: OK");
 
                 if ($new_parent) {
                     $subject_dn = $newrdn . ',' . $new_parent;
                 }
                 else {
                     $old_parent_dn_components = ldap_explode_dn($olddn, 0);
                     unset($old_parent_dn_components["count"]);
                     $old_rdn       = array_shift($old_parent_dn_components);
                     $old_parent_dn = implode(",", $old_parent_dn_components);
                     $subject_dn    = $newrdn . ',' . $old_parent_dn;
                 }
 
                 // modify RDN attribute value, see note above
                 if (!$i && empty($attributes['replace'][$attr])) {
                     list($attr, $val) = explode('=', $newrdn, 2);
                     $attributes['replace'][$attr] = self::quote_string($val, true, true);
                 }
             }
             else {
                 $this->_debug("S: " . ldap_error($this->conn));
                 $this->_warning("LDAP: Failed to rename $olddn to $newrdn,$new_parent. " . ldap_error($this->conn));
                 return false;
             }
         }
 
         if (is_array($attributes['replace']) && !empty($attributes['replace'])) {
             $this->_debug("C: Mod-Replace $subject_dn: " . json_encode($attributes['replace']));
 
             $result = ldap_mod_replace($this->conn, $subject_dn, $attributes['replace']);
 
             if ($result) {
                 $this->_debug("S: OK");
             }
             else {
                 $this->_debug("S: " . ldap_error($this->conn));
                 $this->_warning("LDAP: Failed to replace attributes on $subject_dn: " . json_encode($attributes['replace']));
                 return false;
             }
         }
 
         if (is_array($attributes['del']) && !empty($attributes['del'])) {
             $this->_debug("C: Mod-Delete $subject_dn: " . json_encode($attributes['del']));
 
             $result = ldap_mod_del($this->conn, $subject_dn, $attributes['del']);
 
             if ($result) {
                 $this->_debug("S: OK");
             }
             else {
                 $this->_debug("S: " . ldap_error($this->conn));
                 $this->_warning("LDAP: Failed to delete attributes on $subject_dn: " . json_encode($attributes['del']));
                 return false;
             }
         }
 
         if (is_array($attributes['add']) && !empty($attributes['add'])) {
             $this->_debug("C: Mod-Add $subject_dn: " . json_encode($attributes['add']));
 
             $result = ldap_mod_add($this->conn, $subject_dn, $attributes['add']);
 
             if ($result) {
                 $this->_debug("S: OK");
             }
             else {
                 $this->_debug("S: " . ldap_error($this->conn));
                 $this->_warning("LDAP: Failed to add attributes on $subject_dn: " . json_encode($attributes['add']));
                 return false;
             }
         }
 
         return true;
     }
 
     private function parse_aclrights(&$attributes, $attribute_value)
     {
         $components = explode(':', $attribute_value);
         $_acl_target = array_shift($components);
         $_acl_value = trim(implode(':', $components));
 
         $_acl_components = explode(';', $_acl_target);
 
         switch ($_acl_components[1]) {
             case "entryLevel":
                 $attributes['entryLevelRights'] = Array();
                 $_acl_value = explode(',', $_acl_value);
 
                 foreach ($_acl_value as $right) {
                     list($method, $bool) = explode(':', $right);
                     if ($bool == "1" && !in_array($method, $attributes['entryLevelRights'])) {
                         $attributes['entryLevelRights'][] = $method;
                     }
                 }
 
                 break;
 
             case "attributeLevel":
                 $attributes['attributeLevelRights'][$_acl_components[2]] = Array();
                 $_acl_value = explode(',', $_acl_value);
 
                 foreach ($_acl_value as $right) {
                     list($method, $bool) = explode(':', $right);
                     if ($bool == "1" && !in_array($method, $attributes['attributeLevelRights'][$_acl_components[2]])) {
                         $attributes['attributeLevelRights'][$_acl_components[2]][] = $method;
                     }
                 }
 
                 break;
 
             default:
                 break;
         }
     }
 
     private function parse_attribute_level_rights($attribute_value)
     {
         $attribute_value  = str_replace(", ", ",", $attribute_value);
         $attribute_values = explode(",", $attribute_value);
         $attribute_value  = array();
 
         foreach ($attribute_values as $access_right) {
             $access_right_components = explode(":", $access_right);
             $access_attribute        = strtolower(array_shift($access_right_components));
             $access_value            = array_shift($access_right_components);
 
             $attribute_value[$access_attribute] = array();
 
             for ($i = 0; $i < strlen($access_value); $i++) {
                 $method = $this->attribute_level_rights_map[substr($access_value, $i, 1)];
 
                 if (!in_array($method, $attribute_value[$access_attribute])) {
                     $attribute_value[$access_attribute][] = $method;
                 }
             }
         }
 
         return $attribute_value;
     }
 
     private function parse_entry_level_rights($attribute_value)
     {
         $_attribute_value = array();
 
         for ($i = 0; $i < strlen($attribute_value); $i++) {
             $method = $this->entry_level_rights_map[substr($attribute_value, $i, 1)];
 
             if (!in_array($method, $_attribute_value)) {
                 $_attribute_value[] = $method;
             }
         }
 
         return $_attribute_value;
     }
 
     private function supported_controls()
     {
         if (!empty($this->supported_controls)) {
             return $this->supported_controls;
         }
 
         $this->_info("Obtaining supported controls");
 
         if ($result = $this->search('', '(objectclass=*)', 'base', array('supportedcontrol'))) {
             $result  = $result->entries(true);
             $control = $result['']['supportedcontrol'];
         }
         else {
             $control = array();
         }
 
         $this->_info("Obtained " . count($control) . " supported controls");
         $this->supported_controls = $control;
 
         return $control;
     }
 
     private function vendor_name()
     {
         if (!empty($this->vendor_name)) {
             return $this->vendor_name;
         }
 
         $this->_info("Obtaining LDAP server vendor name");
 
         if ($result = $this->search('', '(objectclass=*)', 'base', array('vendorname'))) {
             $result  = $result->entries(true);
             $name = $result['']['vendorname'];
         }
         else {
             $name = false;
         }
 
         if ($name !== false) {
             $this->_info("Vendor name is $name");
         } else {
             $this->_info("No vendor name!");
         }
 
         $this->vendor = $name;
 
         return $name;
     }
 
     protected function _alert()
     {
         $this->__log(LOG_ALERT, func_get_args());
     }
 
     protected function _critical()
     {
         $this->__log(LOG_CRIT, func_get_args());
     }
 
     protected function _debug()
     {
         $this->__log(LOG_DEBUG, func_get_args());
     }
 
     protected function _emergency()
     {
         $this->__log(LOG_EMERG, func_get_args());
     }
 
     protected function _error()
     {
         $this->__log(LOG_ERR, func_get_args());
     }
 
     protected function _info()
     {
         $this->__log(LOG_INFO, func_get_args());
     }
 
     protected function _notice()
     {
         $this->__log(LOG_NOTICE, func_get_args());
     }
 
     protected function _warning()
     {
         $this->__log(LOG_WARNING, func_get_args());
     }
 
     /**
      *  Log a message.
      */
     private function __log($level, $args)
     {
         $msg = array();
 
         foreach ($args as $arg) {
             $msg[] = !is_string($arg) ? var_export($arg, true) : $arg;
         }
 
         if (!empty($this->_log_hook)) {
             call_user_func_array($this->_log_hook, array($level, $msg));
             return;
         }
 
         if ($this->debug_level > 0) {
             syslog($level, implode("\n", $msg));
         }
     }
 
     /**
      * Add BER sequence with correct length and the given identifier
      */
     private static function _ber_addseq($str, $identifier)
     {
         $len = dechex(strlen($str)/2);
         if (strlen($len) % 2 != 0) {
             $len = '0'.$len;
         }
 
         return $identifier . $len . $str;
     }
 
     /**
      * Returns BER encoded integer value in hex format
      */
     private static function _ber_encode_int($offset)
     {
         $val    = dechex($offset);
         $prefix = '';
 
         // check if bit 8 of high byte is 1
         if (preg_match('/^[89abcdef]/', $val)) {
             $prefix = '00';
         }
 
         if (strlen($val)%2 != 0) {
             $prefix .= '0';
         }
 
         return $prefix . $val;
     }
 
     /**
      * Quotes attribute value string
      *
      * @param string $str     Attribute value
      * @param bool   $dn      True if the attribute is a DN
      * @param bool   $reverse Do reverse replacement
      *
      * @return string Quoted string
      */
     public static function quote_string($str, $is_dn = false, $reverse = false)
     {
         // take first entry if array given
         if (is_array($str)) {
             $str = reset($str);
         }
 
         if ($is_dn) {
             $replace = array(
                 ',' => '\2c',
                 '=' => '\3d',
                 '+' => '\2b',
                 '<' => '\3c',
                 '>' => '\3e',
                 ';' => '\3b',
                 "\\"=> '\5c',
                 '"' => '\22',
                 '#' => '\23'
             );
         }
         else {
             $replace = array(
                 '*' => '\2a',
                 '(' => '\28',
                 ')' => '\29',
                 "\\" => '\5c',
                 '/' => '\2f'
             );
         }
 
         if ($reverse) {
             return str_replace(array_values($replace), array_keys($replace), $str);
         }
 
         return strtr($str, $replace);
     }
 
     /**
      * Unify DN string for comparison
      *
      * @para string $str DN string
      *
      * @return string Unified DN string
      */
     public static function unified_dn($str)
     {
         $result = array();
 
         foreach (explode(',', $str) as $token) {
             list($attr, $value) = explode('=', $token, 2);
 
             $pos = 0;
             while (preg_match('/\\\\[0-9a-fA-F]{2}/', $value, $matches, PREG_OFFSET_CAPTURE, $pos)) {
                 $char  = chr(hexdec(substr($matches[0][0], 1)));
                 $pos   = $matches[0][1];
                 $value = substr_replace($value, $char, $pos, 3);
                 $pos += 1;
             }
 
             $result[] = $attr . '=' . self::quote_string($value, true);
         }
 
         return implode(',', $result);
     }
 
     /**
      * create ber encoding for sort control
      *
      * @param array List of cols to sort by
      * @return string BER encoded option value
      */
     private static function _sort_ber_encode($sortcols)
     {
         $str = '';
         foreach (array_reverse((array)$sortcols) as $col) {
             $ber_val = self::_string2hex($col);
 
             // 30 = ber sequence with a length of octet value
             // 04 = octet string with a length of the ascii value
             $oct = self::_ber_addseq($ber_val, '04');
             $str = self::_ber_addseq($oct, '30') . $str;
         }
 
         // now tack on sequence identifier and length
         $str = self::_ber_addseq($str, '30');
 
         return pack('H'.strlen($str), $str);
     }
 
     /**
      * Returns ascii string encoded in hex
      */
     private static function _string2hex($str)
     {
         $hex = '';
         for ($i=0; $i < strlen($str); $i++)
             $hex .= dechex(ord($str[$i]));
 
         return $hex;
     }
 
     /**
      * Generate BER encoded string for Virtual List View option
      *
      * @param integer List offset (first record)
      * @param integer Records per page
      * @return string BER encoded option value
      */
     private static function _vlv_ber_encode($offset, $rpp, $search = '')
     {
         // This string is ber-encoded, php will prefix this value with:
         // 04 (octet string) and 10 (length of 16 bytes)
         // the code behind this string is broken down as follows:
         // 30 = ber sequence with a length of 0e (14) bytes following
         // 02 = type integer (in two's complement form) with 2 bytes following (beforeCount): 01 00 (ie 0)
         // 02 = type integer (in two's complement form) with 2 bytes following (afterCount):  01 18 (ie 25-1=24)
         // a0 = type context-specific/constructed with a length of 06 (6) bytes following
         // 02 = type integer with 2 bytes following (offset): 01 01 (ie 1)
         // 02 = type integer with 2 bytes following (contentCount):  01 00
 
         // whith a search string present:
         // 81 = type context-specific/constructed with a length of 04 (4) bytes following (the length will change here)
         // 81 indicates a user string is present where as a a0 indicates just a offset search
         // 81 = type context-specific/constructed with a length of 06 (6) bytes following
 
         // the following info was taken from the ISO/IEC 8825-1:2003 x.690 standard re: the
         // encoding of integer values (note: these values are in
         // two-complement form so since offset will never be negative bit 8 of the
         // leftmost octet should never by set to 1):
         // 8.3.2: If the contents octets of an integer value encoding consist
         // of more than one octet, then the bits of the first octet (rightmost) and bit 8
         // of the second (to the left of first octet) octet:
         // a) shall not all be ones; and
         // b) shall not all be zero
 
         if ($search) {
             $search  = preg_replace('/[^-[:alpha:] ,.()0-9]+/', '', $search);
             $ber_val = self::_string2hex($search);
             $str     = self::_ber_addseq($ber_val, '81');
         }
         else {
             // construct the string from right to left
             $str = "020100"; # contentCount
 
             // returns encoded integer value in hex format
             $ber_val = self::_ber_encode_int($offset);
 
             // calculate octet length of $ber_val
             $str = self::_ber_addseq($ber_val, '02') . $str;
 
             // now compute length over $str
             $str = self::_ber_addseq($str, 'a0');
         }
 
         // now tack on records per page
         $str = "020100" . self::_ber_addseq(self::_ber_encode_int($rpp-1), '02') . $str;
 
         // now tack on sequence identifier and length
         $str = self::_ber_addseq($str, '30');
 
         return pack('H'.strlen($str), $str);
     }
 
     private function _fuzzy_search_prefix()
     {
         switch ($this->config_get("fuzzy_search", 2)) {
             case 2:
                 return "*";
                 break;
             case 1:
             case 0:
             default:
                 return "";
                 break;
         }
     }
 
     private function _fuzzy_search_suffix()
     {
         switch ($this->config_get("fuzzy_search", 2)) {
             case 2:
                 return "*";
                 break;
             case 1:
                 return "*";
             case 0:
             default:
                 return "";
                 break;
         }
     }
 
     /**
      * Return the search string value to be used in VLV controls
      *
      * @param array        $sort   List of attributes in vlv index
      * @param array|string $search Search string or attribute => value hash
      *
      * @return string Search string
      */
     private function _vlv_search($sort, $search)
     {
         if (!empty($this->additional_filter)) {
             $this->_debug("Not setting a VLV search filter because we already have a filter");
             return;
         }
 
         if (empty($search)) {
             return;
         }
 
         foreach ((array) $search as $attr => $value) {
             if ($attr && !in_array(strtolower($attr), $sort)) {
                 $this->_debug("Cannot use VLV search using attribute not indexed: $attr (not in " . var_export($sort, true) . ")");
                 return;
             }
             else {
                 return $value . $this->_fuzzy_search_suffix();
             }
         }
     }
 
     /**
      * Set server controls for Virtual List View (paginated listing)
      */
     private function _vlv_set_controls($sort, $list_page, $page_size, $search = null)
     {
         $sort_ctrl = array(
             'oid'   => "1.2.840.113556.1.4.473",
             'value' => self::_sort_ber_encode($sort)
         );
 
         if (!empty($search)) {
             $this->_debug("_vlv_set_controls to include search: " . var_export($search, true));
         }
 
         $vlv_ctrl  = array(
             'oid' => "2.16.840.1.113730.3.4.9",
             'value' => self::_vlv_ber_encode(
                     $offset = ($list_page-1) * $page_size + 1,
                     $page_size,
                     $search
             ),
             'iscritical' => true
         );
 
         $this->_debug("C: set controls sort=" . join(' ', unpack('H'.(strlen($sort_ctrl['value'])*2), $sort_ctrl['value']))
             . " (" . implode(',', (array) $sort) . ");"
             . " vlv=" . join(' ', (unpack('H'.(strlen($vlv_ctrl['value'])*2), $vlv_ctrl['value']))) . " ($offset/$page_size)");
 
         if (!ldap_set_option($this->conn, LDAP_OPT_SERVER_CONTROLS, array($sort_ctrl, $vlv_ctrl))) {
             $this->_debug("S: ".ldap_error($this->conn));
             $this->set_error(self::ERROR_SEARCH, 'vlvnotsupported');
 
             return false;
         }
 
         return true;
     }
 
     /**
      * Get global handle for cache access
      *
      * @return object Cache object
      */
     public function get_cache()
     {
         if ($this->cache === true) {
             // no memcache support in PHP
             if (!class_exists('Memcache')) {
                 $this->cache = false;
                 return false;
             }
 
             // add all configured hosts to pool
             $pconnect = $this->config_get('memcache_pconnect');
             $hosts    = $this->config_get('memcache_hosts');
 
             if ($hosts) {
                 $this->cache        = new Memcache;
                 $this->mc_available = 0;
 
                 $hosts = explode(',', $hosts);
                 foreach ($hosts as $host) {
                     $host = trim($host);
                     if (substr($host, 0, 7) != 'unix://') {
                         list($host, $port) = explode(':', $host);
                         if (!$port) $port = 11211;
                     }
                     else {
                         $port = 0;
                     }
 
                     $this->mc_available += intval($this->cache->addServer(
                         $host, $port, $pconnect, 1, 1, 15, false, array($this, 'memcache_failure')));
                 }
 
                 // test connection and failover (will result in $this->mc_available == 0 on complete failure)
                 $this->cache->increment('__CONNECTIONTEST__', 1);  // NOP if key doesn't exist
             }
 
             if (!$this->mc_available) {
                 $this->cache = false;
             }
         }
 
         return $this->cache;
     }
 
     /**
      * Callback for memcache failure
      */
     public function memcache_failure($host, $port)
     {
         static $seen = array();
 
         // only report once
         if (!$seen["$host:$port"]++) {
             $this->mc_available--;
             $this->_error("LDAP: Memcache failure on host $host:$port");
         }
     }
 
     /**
      * Get cached data
      *
      * @param string $key Cache key
      *
      * @return mixed Cached value
      */
     public function get_cache_data($key)
     {
         if ($cache = $this->get_cache()) {
             return $cache->get($key);
         }
     }
 
     /**
      * Store cached data
      *
      * @param string $key  Cache key
      * @param mixed  $data Data
      * @param int    $ttl  Cache TTL in seconds
      *
      * @return bool False on failure or when cache is disabled, True if data was saved succesfully
      */
     public function set_cache_data($key, $data, $ttl = 3600)
     {
         if ($cache = $this->get_cache()) {
             if (!method_exists($cache, 'replace') || !$cache->replace($key, $data, MEMCACHE_COMPRESSED, $ttl)) {
                 return $cache->set($key, $data, MEMCACHE_COMPRESSED, $ttl);
             }
             else {
                 return true;
             }
         }
 
         return false;
     }
 
     /**
      * Translate a domain name into it's corresponding root dn.
      *
      * @param string $domain Domain name
      *
      * @return string|bool Domain root DN or False on error
      */
     public function domain_root_dn($domain)
     {
         if (empty($domain)) {
             return false;
         }
 
         $ckey = 'domain.root::' . $domain;
         if ($result = $this->icache[$ckey]) {
             return $result;
         }
 
         $this->_debug("Net_LDAP3::domain_root_dn($domain)");
 
         if ($entry_attrs = $this->find_domain($domain)) {
             $name_attribute = $this->config_get('domain_name_attribute');
 
             if (empty($name_attribute)) {
                 $name_attribute = 'associateddomain';
             }
 
             if (is_array($entry_attrs)) {
                 if (!empty($entry_attrs['inetdomainbasedn'])) {
                     $domain_root_dn = $entry_attrs['inetdomainbasedn'];
                 }
                 else {
                     if (is_array($entry_attrs[$name_attribute])) {
                         $domain_root_dn = $this->_standard_root_dn($entry_attrs[$name_attribute][0]);
                     }
                     else {
                         $domain_root_dn = $this->_standard_root_dn($entry_attrs[$name_attribute]);
                     }
                 }
             }
         }
 
         if (empty($domain_root_dn)) {
             $domain_root_dn = $this->_standard_root_dn($domain);
         }
 
         $this->_debug("Net_LDAP3::domain_root_dn() result: $domain_root_dn");
 
         return $this->icache[$ckey] = $domain_root_dn;
     }
 
     /**
      * Find domain by name
      *
      * @param string $domain     Domain name
      * @param array  $attributes Result attributes
      *
      * @return array|bool Domain attributes (plus 'dn' attribute) or False if not found
      */
     public function find_domain($domain, $attributes = array('*'))
     {
         if (empty($domain)) {
             return false;
         }
 
         $ckey  = 'domain::' . $domain;
         $ickey = $ckey . '::' . md5(implode(',', $attributes));
 
         if (isset($this->icache[$ickey])) {
             return $this->icache[$ickey];
         }
 
         $this->_debug("Net_LDAP3::find_domain($domain)");
 
         // use cache
         $domain_dn = $this->get_cache_data($ckey);
 
         if ($domain_dn) {
             $result = $this->get_entry_attributes($domain_dn, $attributes);
             if (!empty($result)) {
                 $result['dn'] = $domain_dn;
             }
             else {
                 $result = false;
             }
         }
         else if ($domain_base_dn = $this->config_get('domain_base_dn')) {
             $domain_filter  = $this->config_get('domain_filter');
 
             if (strpos($domain_filter, '%s') !== false) {
                 $domain_filter = str_replace('%s', self::quote_string($domain), $domain_filter);
             }
             else {
                 $name_attribute = $this->config_get('domain_name_attribute');
                 if (empty($name_attribute)) {
                     $name_attribute = 'associateddomain';
                 }
 
                 $domain_filter = "(&" . $domain_filter . "(" . $name_attribute . "=" . self::quote_string($domain) . "))";
             }
 
             if ($result = $this->search($domain_base_dn, $domain_filter, 'sub', $attributes)) {
                 $result       = $result->entries(true);
                 $domain_dn    = key($result);
 
                 if (empty($domain_dn)) {
                     $result = false;
                 }
                 else {
                     $result       = $result[$domain_dn];
                     $result['dn'] = $domain_dn;
 
                     // cache domain DN
                     $this->set_cache_data($ckey, $domain_dn);
                 }
             }
         }
 
         $this->_debug("Net_LDAP3::find_domain() result: " . var_export($result, true));
 
         return $this->icache[$ickey] = $result;
     }
 
     /**
      * From a domain name, such as 'kanarip.com', create a standard root
      * dn, such as 'dc=kanarip,dc=com'.
      *
      * As the parameter $associatedDomains, either pass it an array (such
      * as may have been returned by ldap_get_entries() or perhaps
      * ldap_list()), where the function will assume the first value
      * ($array[0]) to be the uber-level domain name, or pass it a string
      * such as 'kanarip.nl'.
      *
      * @return string
      */
     protected function _standard_root_dn($associatedDomains)
     {
         if (is_array($associatedDomains)) {
             // Usually, the associatedDomain in position 0 is the naming attribute associatedDomain
             if ($associatedDomains['count'] > 1) {
                 // Issue a debug message here
                 $relevant_associatedDomain = $associatedDomains[0];
             }
             else {
                 $relevant_associatedDomain = $associatedDomains[0];
             }
         }
         else {
             $relevant_associatedDomain = $associatedDomains;
         }
 
         return 'dc=' . implode(',dc=', explode('.', $relevant_associatedDomain));
     }
 }