<?php
+
/**
* abook_ldap_server.php
*
- * Copyright (c) 1999-2005 The SquirrelMail Project Team
- * Licensed under the GNU GPL. For full terms see the file COPYING.
- *
* Address book backend for LDAP server
*
+ * LDAP filtering code by Tim Bell
+ * <bhat at users.sourceforge.net> (#539534)
+ * ADS limit_scope code by Michael Brown
+ * <mcb30 at users.sourceforge.net> (#1035454)
+ * StartTLS code by John Lane
+ * <starfry at users.sourceforge.net> (#1197703)
+ *
+ * @copyright © 1999-2006 The SquirrelMail Project Team
+ * @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id$
* @package squirrelmail
* @subpackage addressbook
* Address book backend for LDAP server
*
* An array with the following elements must be passed to
- * the class constructor (elements marked ? are optional):
+ * the class constructor (elements marked ? are optional)
+ *
+ * Main settings:
* <pre>
* host => LDAP server hostname/IP-address
* base => LDAP server root (base dn). Empty string allowed.
* ? bindpw => LDAP Bind Password.
* ? protocol => LDAP Bind protocol.
* </pre>
+ * Advanced settings:
+ * <pre>
+ * ? filter => Filter expression to limit ldap searches
+ * ? limit_scope => Limits scope to base DN (Specific to Win2k3 ADS).
+ * ? listing => Controls listing of LDAP directory.
+ * ? search_tree => Controls subtree or one level search.
+ * ? starttls => Controls use of StartTLS on LDAP connections
+ * </pre>
* NOTE. This class should not be used directly. Use the
* "AddressBook" class instead.
* @package squirrelmail
* @var integer max rows in result
*/
var $maxrows = 250;
+ /**
+ * @var string ldap filter
+ * @since 1.5.1
+ */
+ var $filter = '';
/**
* @var integer timeout of LDAP operations (in seconds)
*/
* @since 1.5.0 and 1.4.3
*/
var $protocol = '';
+ /**
+ * @var boolean limits scope to base dn
+ * @since 1.5.1
+ */
+ var $limit_scope = false;
+ /**
+ * @var boolean controls listing of directory
+ * @since 1.5.1
+ */
+ var $listing = false;
+ /**
+ * @var boolean controls ldap search type.
+ * only first level entries are displayed if set to false
+ * @since 1.5.1
+ */
+ var $search_tree = true;
+ /**
+ * @var boolean controls use of StartTLS on ldap
+ * connections. Requires php 4.2+ and protocol >= 3
+ * @since 1.5.1
+ */
+ var $starttls = false;
/**
* Constructor. Connects to database
*/
function abook_ldap_server($param) {
if(!function_exists('ldap_connect')) {
- $this->set_error('LDAP support missing from PHP');
+ $this->set_error(_("PHP install does not have LDAP support."));
return;
}
if(is_array($param)) {
$this->server = $param['host'];
$this->basedn = $param['base'];
- if(!empty($param['port'])) {
+
+ if(!empty($param['port']))
$this->port = $param['port'];
- }
- if(!empty($param['charset'])) {
+
+ if(!empty($param['charset']))
$this->charset = strtolower($param['charset']);
- }
- if(isset($param['maxrows'])) {
+
+ if(isset($param['maxrows']))
$this->maxrows = $param['maxrows'];
- }
- if(isset($param['timeout'])) {
+
+ if(isset($param['timeout']))
$this->timeout = $param['timeout'];
- }
- if(isset($param['binddn'])) {
+
+ if(isset($param['binddn']))
$this->binddn = $param['binddn'];
- }
- if(isset($param['bindpw'])) {
+
+ if(isset($param['bindpw']))
$this->bindpw = $param['bindpw'];
- }
- if(isset($param['protocol'])) {
- $this->protocol = $param['protocol'];
- }
+
+ if(isset($param['protocol']))
+ $this->protocol = (int) $param['protocol'];
+
+ if(isset($param['filter']))
+ $this->filter = trim($param['filter']);
+
+ if(isset($param['limit_scope']))
+ $this->limit_scope = (bool) $param['limit_scope'];
+
+ if(isset($param['listing']))
+ $this->listing = (bool) $param['listing'];
+
+ if(isset($param['search_tree']))
+ $this->search_tree = (bool) $param['search_tree'];
+
+ if(isset($param['starttls']))
+ $this->starttls = (bool) $param['starttls'];
+
if(empty($param['name'])) {
$this->sname = 'LDAP: ' . $param['host'];
- }
- else {
+ } else {
$this->sname = $param['name'];
}
- $this->open(true);
+ /*
+ * don't open LDAP server on addressbook_init(),
+ * open ldap connection only on search. Speeds up
+ * addressbook_init() call.
+ */
+ // $this->open(true);
} else {
$this->set_error('Invalid argument to constructor');
}
}
$this->linkid = @ldap_connect($this->server, $this->port);
+ /**
+ * check if connection was successful
+ * It does not work with OpenLDAP 2.x libraries. Connect error will be
+ * displayed only on ldap command that tries to make connection
+ * (ldap_start_tls or ldap_bind).
+ */
if(!$this->linkid) {
- if(function_exists('ldap_error')) {
- return $this->set_error(ldap_error($this->linkid));
- } else {
- return $this->set_error('ldap_connect failed');
- }
+ return $this->set_error($this->ldap_error('ldap_connect failed'));
}
if(!empty($this->protocol)) {
- if(!@ldap_set_option($this->linkid, LDAP_OPT_PROTOCOL_VERSION, $this->protocol)) {
- if(function_exists('ldap_error')) {
- return $this->set_error(ldap_error($this->linkid));
- } else {
- return $this->set_error('ldap_set_option failed');
- }
+ // make sure that ldap_set_option() is available before using it
+ if(! function_exists('ldap_set_option') ||
+ !@ldap_set_option($this->linkid, LDAP_OPT_PROTOCOL_VERSION, $this->protocol)) {
+ return $this->set_error('unable to set ldap protocol number');
}
}
+ /**
+ * http://www.php.net/ldap-start-tls
+ * Check if v3 or newer protocol is used,
+ * check if ldap_start_tls function is available.
+ * Silently ignore setting, if these requirements are not satisfied.
+ * Break with error message if somebody tries to start TLS on
+ * ldaps or socket connection.
+ */
+ if($this->starttls &&
+ !empty($this->protocol) && $this->protocol >= 3 &&
+ function_exists('ldap_start_tls') ) {
+ // make sure that $this->server is not ldaps:// or ldapi:// URL.
+ if (preg_match("/^ldap[si]:\/\/.+/i",$this->server)) {
+ return $this->set_error("you can't enable starttls on ldaps and ldapi connections.");
+ }
+
+ // try starting tls
+ if (! @ldap_start_tls($this->linkid)) {
+ // set error if call fails
+ return $this->set_error($this->ldap_error('ldap_start_tls failed'));
+ }
+ }
+
+ if(!empty($this->limit_scope) && $this->limit_scope) {
+ if(empty($this->protocol) || intval($this->protocol) < 3) {
+ return $this->set_error('limit_scope requires protocol >= 3');
+ }
+ // See http://msdn.microsoft.com/library/en-us/ldap/ldap/ldap_server_domain_scope_oid.asp
+ $ctrl = array ( "oid" => "1.2.840.113556.1.4.1339", "iscritical" => TRUE );
+ /*
+ * Option is set only during connection.
+ * It does not cause immediate errors with OpenLDAP 2.x libraries.
+ */
+ if(! function_exists('ldap_set_option') ||
+ !@ldap_set_option($this->linkid, LDAP_OPT_SERVER_CONTROLS, array($ctrl))) {
+ return $this->set_error($this->ldap_error('limit domain scope failed'));
+ }
+ }
+
+ // authenticated bind
if(!empty($this->binddn)) {
if(!@ldap_bind($this->linkid, $this->binddn, $this->bindpw)) {
- if(function_exists('ldap_error')) {
- return $this->set_error(ldap_error($this->linkid));
- } else {
- return $this->set_error('authenticated ldap_bind failed');
- }
- }
+ return $this->set_error($this->ldap_error('authenticated ldap_bind failed'));
+ }
} else {
+ // anonymous bind
if(!@ldap_bind($this->linkid)) {
- if(function_exists('ldap_error')) {
- return $this->set_error(ldap_error($this->linkid));
- } else {
- return $this->set_error('anonymous ldap_bind failed');
- }
+ return $this->set_error($this->ldap_error('anonymous ldap_bind failed'));
}
}
}
}
-
- /* ========================== Public ======================== */
-
/**
- * Search the LDAP server
- * @param string $expr search expression
- * @return array search results
+ * Sanitizes ldap search strings.
+ * See rfc2254
+ * @link http://www.faqs.org/rfcs/rfc2254.html
+ * @since 1.5.1 and 1.4.5
+ * @param string $string
+ * @return string sanitized string
*/
- function search($expr) {
-
- /* To be replaced by advanded search expression parsing */
- if(is_array($expr)) return false;
-
- /* Encode the expression */
- $expr = $this->charset_encode($expr);
- if(strstr($expr, '*') === false) {
- $expr = "*$expr*";
- }
- $expression = "cn=$expr";
+ function ldapspecialchars($string) {
+ $sanitized=array('\\' => '\5c',
+ '*' => '\2a',
+ '(' => '\28',
+ ')' => '\29',
+ "\x00" => '\00');
+
+ return str_replace(array_keys($sanitized),array_values($sanitized),$string);
+ }
+ /**
+ * Search LDAP server.
+ *
+ * Warning: You must make sure that ldap query is correctly formated and
+ * sanitize use of special ldap keywords.
+ * @param string $expression ldap query
+ * @return array search results (false on error)
+ * @since 1.5.1
+ */
+ function ldap_search($expression) {
/* Make sure connection is there */
if(!$this->open()) {
return false;
}
- $sret = @ldap_search($this->linkid, $this->basedn, $expression,
- array('dn', 'o', 'ou', 'sn', 'givenname', 'cn', 'mail'),
- 0, $this->maxrows, $this->timeout);
+ if ($this->search_tree) {
+ // ldap_search - search subtree
+ $sret = @ldap_search($this->linkid, $this->basedn, $expression,
+ array('dn', 'o', 'ou', 'sn', 'givenname', 'cn', 'mail'),
+ 0, $this->maxrows, $this->timeout);
+ } else {
+ // ldap_list - search one level
+ $sret = @ldap_list($this->linkid, $this->basedn, $expression,
+ array('dn', 'o', 'ou', 'sn', 'givenname', 'cn', 'mail'),
+ 0, $this->maxrows, $this->timeout);
+ }
- /* Should get error from server using the ldap_error() function,
- * but it only exist in the PHP LDAP documentation. */
+ /* Return error if search failed */
if(!$sret) {
- if(function_exists('ldap_error')) {
- return $this->set_error(ldap_error($this->linkid));
- } else {
- return $this->set_error('ldap_search failed');
- }
+ return $this->set_error($this->ldap_error('ldap_search failed'));
}
if(@ldap_count_entries($this->linkid, $sret) <= 0) {
$row = $res[$i];
/* Extract data common for all e-mail addresses
- * of an object. Use only the first name */
+ * of an object. Use only the first name */
$nickname = $this->charset_decode($row['dn']);
+
+ /**
+ * calculate length of basedn and remove it from nickname
+ * ignore whitespaces between RDNs
+ * Nicknames are shorter and still unique
+ */
+ $basedn_len=strlen(preg_replace('/,\s*/',',',trim($this->basedn)));
+ $nickname=substr(preg_replace('/,\s*/',',',$nickname),0,(-1 - $basedn_len));
+
$fullname = $this->charset_decode($row['cn'][0]);
if(!empty($row['ou'][0])) {
ldap_free_result($sret);
return $ret;
- } /* end search() */
+ }
+
+ /**
+ * Get error from LDAP resource if possible
+ *
+ * Should get error from server using the ldap_errno() and ldap_err2str() functions
+ * @param string $sError error message used when ldap error functions
+ * and connection resource are unavailable
+ * @return string error message
+ * @since 1.5.1
+ */
+ function ldap_error($sError) {
+ // it is possible that function_exists() tests are not needed
+ if(function_exists('ldap_err2str') &&
+ function_exists('ldap_errno') &&
+ is_resource($this->linkid)) {
+ return ldap_err2str(ldap_errno($this->linkid));
+ // return ldap_error($this->linkid);
+ } else {
+ return $sError;
+ }
+ }
+
+ /* ========================== Public ======================== */
+
+ /**
+ * Search the LDAP server
+ * @param string $expr search expression
+ * @return array search results
+ */
+ function search($expr) {
+ /* To be replaced by advanded search expression parsing */
+ if(is_array($expr)) return false;
+
+ // don't allow wide search when listing is disabled.
+ if ($expr=='*' && ! $this->listing) {
+ return array();
+ } elseif ($expr=='*') {
+ // allow use of wildcard when listing is enabled.
+ $expression = '(cn=*)';
+ } else {
+ /* Convert search from user's charset to the one used in ldap */
+ $expr = $this->charset_encode($expr);
+
+ /* sanitize search string */
+ $expr = $this->ldapspecialchars($expr);
+
+ /* Search for same string in cn, main and sn */
+ $expression = '(|(cn=*'.$expr.'*)(mail=*'.$expr.'*)(sn=*'.$expr.'*))';
+
+ /* Undo sanitizing of * symbol */
+ $expression = str_replace('\2a','*',$expression);
+ }
+
+ /* Add search filtering */
+ if ($this->filter!='')
+ $expression = '(&' . $this->filter . $expression . ')';
+
+ /* Use internal search function and return search results */
+ return $this->ldap_search($expression);
+ }
/**
* List all entries present in LDAP server
*
- * If you run a tiny LDAP server and you want the "List All" button
- * to show EVERYONE, disable first return call and enable the second one.
- * Remember that maxrows setting might limit list of returned entries.
- *
+ * maxrows setting might limit list of returned entries.
* Careful with this -- it could get quite large for big sites.
* @return array all entries in ldap server
*/
function list_addr() {
- return array();
- // return $this->search('*');
+ if (! $this->listing)
+ return array();
+
+ /* set wide search expression */
+ $expression = '(cn=*)';
+
+ /* add filtering */
+ if ($this->filter!='')
+ $expression = '(&' . $this->filter . $expression .')';
+
+ /* use internal search function and return search results */
+ return $this->ldap_search($expression);
}
}
?>
\ No newline at end of file
projects / squirrelmail.git / blobdiff