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<?php
/**
 * LDAP driver.
 *
 * Provides a subset of ADOdb commands, allowing read-only access to an LDAP database.
 *
 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.
 *
 * @package ADOdb
 * @link https://adodb.org Project's web site and documentation
 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker
 *
 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
 * any later version. This means you can use it in proprietary products.
 * See the LICENSE.md file distributed with this source code for details.
 * @license BSD-3-Clause
 * @license LGPL-2.1-or-later
 *
 * @copyright 2000-2013 John Lim
 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
 * @author Joshua Eldridge <joshuae74@hotmail.com>
 */

// security - hide paths
if (!defined('ADODB_DIR')) die();

if (!defined('LDAP_ASSOC')) {
	define('LDAP_ASSOC',ADODB_FETCH_ASSOC);
	define('LDAP_NUM',ADODB_FETCH_NUM);
	define('LDAP_BOTH',ADODB_FETCH_BOTH);
}

class ADODB_ldap extends ADOConnection {
	var $databaseType = 'ldap';
	var $dataProvider = 'ldap';

# Connection information
	var $username = false;
	var $password = false;

# Used during searches
	var $filter;
	var $dn;
	var $version;
	var $port = 389;

# Options configuration information
	var $LDAP_CONNECT_OPTIONS;

# error on binding, eg. "Binding: invalid credentials"
	var $_bind_errmsg = "Binding: %s";

// returns true or false

function _connect( $host, $username, $password, $ldapbase)
	{
		global $LDAP_CONNECT_OPTIONS;

if ( !function_exists( 'ldap_connect' ) ) return null;

if (strpos($host,'ldap://') === 0 || strpos($host,'ldaps://') === 0) {
			$this->_connectionID = @ldap_connect($host);
		} else {
			$conn_info = array( $host,$this->port);

if ( strstr( $host, ':' ) ) {
				$conn_info = explode( ':', $host );
			}

$this->_connectionID = @ldap_connect( $conn_info[0], $conn_info[1] );
		}
		if (!$this->_connectionID) {
			$e = 'Could not connect to ' . $conn_info[0];
			$this->_errorMsg = $e;
			if ($this->debug) ADOConnection::outp($e);
			return false;
		}
		if( count( $LDAP_CONNECT_OPTIONS ) > 0 ) {
			$this->_inject_bind_options( $LDAP_CONNECT_OPTIONS );
		}

if ($username) {
			$bind = @ldap_bind( $this->_connectionID, $username, $password );
		} else {
			$username = 'anonymous';
			$bind = @ldap_bind( $this->_connectionID );
		}

if (!$bind) {
			$e = sprintf($this->_bind_errmsg,ldap_error($this->_connectionID));
			$this->_errorMsg = $e;
			if ($this->debug) ADOConnection::outp($e);
			return false;
		}
		$this->_errorMsg = '';
		$this->database = $ldapbase;
		return $this->_connectionID;
	}

/*
	Valid Domain Values for LDAP Options:

LDAP_OPT_DEREF (integer)
	LDAP_OPT_SIZELIMIT (integer)
	LDAP_OPT_TIMELIMIT (integer)
	LDAP_OPT_PROTOCOL_VERSION (integer)
	LDAP_OPT_ERROR_NUMBER (integer)
	LDAP_OPT_REFERRALS (boolean)
	LDAP_OPT_RESTART (boolean)
	LDAP_OPT_HOST_NAME (string)
	LDAP_OPT_ERROR_STRING (string)
	LDAP_OPT_MATCHED_DN (string)
	LDAP_OPT_SERVER_CONTROLS (array)
	LDAP_OPT_CLIENT_CONTROLS (array)

Make sure to set this BEFORE calling Connect()

Example:

$LDAP_CONNECT_OPTIONS = Array(
		Array (
			"OPTION_NAME"=>LDAP_OPT_DEREF,
			"OPTION_VALUE"=>2
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_SIZELIMIT,
			"OPTION_VALUE"=>100
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_TIMELIMIT,
			"OPTION_VALUE"=>30
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_PROTOCOL_VERSION,
			"OPTION_VALUE"=>3
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_ERROR_NUMBER,
			"OPTION_VALUE"=>13
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_REFERRALS,
			"OPTION_VALUE"=>FALSE
		),
		Array (
			"OPTION_NAME"=>LDAP_OPT_RESTART,
			"OPTION_VALUE"=>FALSE
		)
	);
*/

function _inject_bind_options( $options ) {
		foreach( $options as $option ) {
			ldap_set_option( $this->_connectionID, $option["OPTION_NAME"], $option["OPTION_VALUE"] )
				or die( "Unable to set server option: " . $option["OPTION_NAME"] );
		}
	}

function _query($sql,$inputarr=false)
	{
		$rs = @ldap_search( $this->_connectionID, $this->database, $sql );
		$this->_errorMsg = ($rs) ? '' : 'Search error on '.$sql.': '.ldap_error($this->_connectionID);
		return $rs;
	}

function ErrorMsg()
	{
		return $this->_errorMsg;
	}

function ErrorNo()
	{
		return @ldap_errno($this->_connectionID);
	}

/* closes the LDAP connection */
	function _close()
	{
		@ldap_close( $this->_connectionID );
		$this->_connectionID = false;
	}

function SelectDB($db) {
		$this->database = $db;
		return true;
	} // SelectDB

function ServerInfo()
	{
		if( !empty( $this->version ) ) {
			return $this->version;
		}

$version = array();
		/*
		Determines how aliases are handled during search.
		LDAP_DEREF_NEVER (0x00)
		LDAP_DEREF_SEARCHING (0x01)
		LDAP_DEREF_FINDING (0x02)
		LDAP_DEREF_ALWAYS (0x03)
		The LDAP_DEREF_SEARCHING value means aliases are dereferenced during the search but
		not when locating the base object of the search. The LDAP_DEREF_FINDING value means
		aliases are dereferenced when locating the base object but not during the search.
		Default: LDAP_DEREF_NEVER
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_DEREF, $version['LDAP_OPT_DEREF'] ) ;
		switch ( $version['LDAP_OPT_DEREF'] ) {
			case 0:
				$version['LDAP_OPT_DEREF'] = 'LDAP_DEREF_NEVER';
			case 1:
				$version['LDAP_OPT_DEREF'] = 'LDAP_DEREF_SEARCHING';
			case 2:
				$version['LDAP_OPT_DEREF'] = 'LDAP_DEREF_FINDING';
			case 3:
				$version['LDAP_OPT_DEREF'] = 'LDAP_DEREF_ALWAYS';
		}

/*
		A limit on the number of entries to return from a search.
		LDAP_NO_LIMIT (0) means no limit.
		Default: LDAP_NO_LIMIT
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_SIZELIMIT, $version['LDAP_OPT_SIZELIMIT'] );
		if ( $version['LDAP_OPT_SIZELIMIT'] == 0 ) {
			$version['LDAP_OPT_SIZELIMIT'] = 'LDAP_NO_LIMIT';
		}

/*
		A limit on the number of seconds to spend on a search.
		LDAP_NO_LIMIT (0) means no limit.
		Default: LDAP_NO_LIMIT
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_TIMELIMIT, $version['LDAP_OPT_TIMELIMIT'] );
		if ( $version['LDAP_OPT_TIMELIMIT'] == 0 ) {
			$version['LDAP_OPT_TIMELIMIT'] = 'LDAP_NO_LIMIT';
		}

/*
		Determines whether the LDAP library automatically follows referrals returned by LDAP servers or not.
		LDAP_OPT_ON
		LDAP_OPT_OFF
		Default: ON
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_REFERRALS, $version['LDAP_OPT_REFERRALS'] );
		if ( $version['LDAP_OPT_REFERRALS'] == 0 ) {
			$version['LDAP_OPT_REFERRALS'] = 'LDAP_OPT_OFF';
		} else {
			$version['LDAP_OPT_REFERRALS'] = 'LDAP_OPT_ON';
		}

/*
		Determines whether LDAP I/O operations are automatically restarted if they abort prematurely.
		LDAP_OPT_ON
		LDAP_OPT_OFF
		Default: OFF
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_RESTART, $version['LDAP_OPT_RESTART'] );
		if ( $version['LDAP_OPT_RESTART'] == 0 ) {
			$version['LDAP_OPT_RESTART'] = 'LDAP_OPT_OFF';
		} else {
			$version['LDAP_OPT_RESTART'] = 'LDAP_OPT_ON';
		}

/*
		This option indicates the version of the LDAP protocol used when communicating with the primary LDAP server.
		LDAP_VERSION2 (2)
		LDAP_VERSION3 (3)
		Default: LDAP_VERSION2 (2)
		*/
		ldap_get_option( $this->_connectionID, LDAP_OPT_PROTOCOL_VERSION, $version['LDAP_OPT_PROTOCOL_VERSION'] );
		if ( $version['LDAP_OPT_PROTOCOL_VERSION'] == 2 ) {
			$version['LDAP_OPT_PROTOCOL_VERSION'] = 'LDAP_VERSION2';
		} else {
			$version['LDAP_OPT_PROTOCOL_VERSION'] = 'LDAP_VERSION3';
		}

/* The host name (or list of hosts) for the primary LDAP server. */
		ldap_get_option( $this->_connectionID, LDAP_OPT_HOST_NAME, $version['LDAP_OPT_HOST_NAME'] );
		ldap_get_option( $this->_connectionID, LDAP_OPT_ERROR_NUMBER, $version['LDAP_OPT_ERROR_NUMBER'] );
		ldap_get_option( $this->_connectionID, LDAP_OPT_ERROR_STRING, $version['LDAP_OPT_ERROR_STRING'] );
		ldap_get_option( $this->_connectionID, LDAP_OPT_MATCHED_DN, $version['LDAP_OPT_MATCHED_DN'] );

return $this->version = $version;
	}
}

/*--------------------------------------------------------------------------------------
	Class Name: Recordset
--------------------------------------------------------------------------------------*/

class ADORecordSet_ldap extends ADORecordSet{

var $databaseType = "ldap";
	var $canSeek = false;
	var $_entryID; /* keeps track of the entry resource identifier */

function __construct($queryID,$mode=false)
	{
		if ($mode === false) {
			global $ADODB_FETCH_MODE;
			$mode = $ADODB_FETCH_MODE;
		}
		switch ($mode)
		{
		case ADODB_FETCH_NUM:
			$this->fetchMode = LDAP_NUM;
			break;
		case ADODB_FETCH_ASSOC:
			$this->fetchMode = LDAP_ASSOC;
			break;
		case ADODB_FETCH_DEFAULT:
		case ADODB_FETCH_BOTH:
		default:
			$this->fetchMode = LDAP_BOTH;
			break;
		}

parent::__construct($queryID);
	}

function _initrs()
	{
		/*
		This could be teaked to respect the $COUNTRECS directive from ADODB
		It's currently being used in the _fetch() function and the
		GetAssoc() function
		*/
		$this->_numOfRows = ldap_count_entries( $this->connection->_connectionID, $this->_queryID );
	}

/*
	Return whole recordset as a multi-dimensional associative array
	*/
	function GetAssoc($force_array = false, $first2cols = false, $fetchMode = -1)
	{
		$records = $this->_numOfRows;
		$results = array();
		for ( $i=0; $i < $records; $i++ ) {
			foreach ( $this->fields as $k=>$v ) {
				if ( is_array( $v ) ) {
					if ( $v['count'] == 1 ) {
						$results[$i][$k] = $v[0];
					} else {
						array_shift( $v );
						$results[$i][$k] = $v;
					}
				}
			}
		}

return $results;
	}

return $results;
	}

function _fetch()
	{
		if ( $this->_currentRow >= $this->_numOfRows && $this->_numOfRows >= 0 ) {
			return false;
		}

if ( $this->_currentRow == 0 ) {
			$this->_entryID = ldap_first_entry( $this->connection->_connectionID, $this->_queryID );
		} else {
			$this->_entryID = ldap_next_entry( $this->connection->_connectionID, $this->_entryID );
		}

$this->fields = ldap_get_attributes( $this->connection->_connectionID, $this->_entryID );
		$this->_numOfFields = $this->fields['count'];

switch ( $this->fetchMode ) {

case LDAP_ASSOC:
				$this->fields = $this->GetRowAssoc();
				break;

case LDAP_NUM:
				$this->fields = array_merge($this->GetRowNums(),$this->GetRowAssoc());
				break;

case LDAP_BOTH:
			default:
				$this->fields = $this->GetRowNums();
				break;
		}

return is_array( $this->fields );
	}

function _close() {
		@ldap_free_result( $this->_queryID );
		$this->_queryID = false;
	}

}

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