Auth_Container_LDAP Class Reference

Inheritance diagram for Auth_Container_LDAP:

Collaboration diagram for Auth_Container_LDAP:

Public Member Functions
	Auth_Container_LDAP ($params)
	Constructor of the container class.
	_prepare ()
	Prepare LDAP connection.
	_connect ()
	Connect to the LDAP server using the global options.
	_disconnect ()
	Disconnects (unbinds) from ldap server.
	_getBaseDN ()
	Tries to find Basedn via namingContext Attribute.
	_isValidLink ()
	determines whether there is a valid ldap conenction or not
	_setDefaults ()
	Set some default options.
	_parseOptions ($array)
	Parse options passed to the container class.
	_setV12OptionsToV13 ($array)
	Adapt deprecated options from Auth 1.2 LDAP to Auth 1.3 LDAP.
	_scope2function ($scope)
	Get search function for scope.
	fetchData ($username, $password)
	Fetch data from LDAP server.
	checkGroup ($user)
	Validate group membership.
	_quoteFilterString ($filter_str)
	Escapes LDAP filter special characters as defined in RFC 2254.
Public Member Functions inherited from Auth_Container
	Auth_Container ()
	Constructor.
	fetchData ($username, $password, $isChallengeResponse=false)
	Fetch data from storage container.
	verifyPassword ($password1, $password2, $cryptType="md5")
	Crypt and verfiy the entered password.
	supportsChallengeResponse ()
	Returns true if the container supports Challenge Response password authentication.
	getCryptType ()
	Returns the crypt current crypt type of the container.
	listUsers ()
	List all users that are available from the storage container.
	getUser ($username)
	Returns a user assoc array.
	addUser ($username, $password, $additional=null)
	Add a new user to the storage container.
	removeUser ($username)
	Remove user from the storage container.
	changePassword ($username, $password)
	Change password for user in the storage container.
	log ($message, $level=AUTH_LOG_DEBUG)
	Log a message to the Auth log.
Public Member Functions inherited from ilAuthContainerBase
	loginObserver ($a_username, $a_auth)
	Called after successful login.
	failedLoginObserver ($a_username, $a_auth)
	Called after failed login.
	checkAuthObserver ($a_username, $a_auth)
	Called after check auth requests.
	logoutObserver ($a_username, $a_auth)
	Called after logout.

Data Fields
	$options = array()
	$conn_id = false
Data Fields inherited from Auth_Container
	$activeUser = ""
	User that is currently selected from the storage container.
	$_auth_obj = null
	The Auth object this container is attached to.

Detailed Description

Definition at line 203 of file LDAP.php.

Member Function Documentation

Auth_Container_LDAP::_connect

(

)

Connect to the LDAP server using the global options.

private

Returns

object Returns a PEAR error object if an error occurs.

Definition at line 276 of file LDAP.php.

References _disconnect(), AUTH_LOG_DEBUG, Auth_Container\log(), and PEAR\raiseError().

Referenced by _prepare().

    {
        $this->log('Auth_Container_LDAP::_connect() called.', AUTH_LOG_DEBUG);
        // connect
        if (isset($this->options['url']) && $this->options['url'] != '') {
            $this->log('Connecting with URL', AUTH_LOG_DEBUG);
            $conn_params = array($this->options['url']);
        } else {
            $this->log('Connecting with host:port', AUTH_LOG_DEBUG);
            $conn_params = array($this->options['host'], $this->options['port']);
        }

        if (($this->conn_id = @call_user_func_array('ldap_connect', $conn_params)) === false) {
            $this->log('Connection to server failed.', AUTH_LOG_DEBUG);
            $this->log('LDAP ERROR: '.ldap_errno($this->conn_id).': '.ldap_error($this->conn_id), AUTH_LOG_DEBUG);
            return PEAR::raiseError('Auth_Container_LDAP: Could not connect to server.', 41);
        }
        $this->log('Successfully connected to server', AUTH_LOG_DEBUG);

        // switch LDAP version
        if (is_numeric($this->options['version']) && $this->options['version'] > 2) {
            $this->log("Switching to LDAP version {$this->options['version']}", AUTH_LOG_DEBUG);
            @ldap_set_option($this->conn_id, LDAP_OPT_PROTOCOL_VERSION, $this->options['version']);

            // start TLS if available
            if (isset($this->options['start_tls']) && $this->options['start_tls']) {
                $this->log("Starting TLS session", AUTH_LOG_DEBUG);
                if (@ldap_start_tls($this->conn_id) === false) {
                    $this->log('Could not start TLS session', AUTH_LOG_DEBUG);
                    $this->log('LDAP ERROR: '.ldap_errno($this->conn_id).': '.ldap_error($this->conn_id), AUTH_LOG_DEBUG);
                    return PEAR::raiseError('Auth_Container_LDAP: Could not start tls.', 41);
                }
            }
        }

        // switch LDAP referrals
        if (is_bool($this->options['referrals'])) {
            $this->log("Switching LDAP referrals to " . (($this->options['referrals']) ? 'true' : 'false'), AUTH_LOG_DEBUG);
            if (@ldap_set_option($this->conn_id, LDAP_OPT_REFERRALS, $this->options['referrals']) === false) {
                $this->log('Could not change LDAP referrals options', AUTH_LOG_DEBUG);
                $this->log('LDAP ERROR: '.ldap_errno($this->conn_id).': '.ldap_error($this->conn_id), AUTH_LOG_DEBUG);
            }
        }

        // bind with credentials or anonymously
        if (strlen($this->options['binddn']) && strlen($this->options['bindpw'])) {
            $this->log('Binding with credentials', AUTH_LOG_DEBUG);
            $bind_params = array($this->conn_id, $this->options['binddn'], $this->options['bindpw']);
        } else {
            $this->log('Binding anonymously', AUTH_LOG_DEBUG);
            $bind_params = array($this->conn_id);
        }

        // bind for searching
        if ((@call_user_func_array('ldap_bind', $bind_params)) === false) {
            $this->log('Bind failed', AUTH_LOG_DEBUG);
            $this->log('LDAP ERROR: '.ldap_errno($this->conn_id).': '.ldap_error($this->conn_id), AUTH_LOG_DEBUG);
            $this->_disconnect();
            return PEAR::raiseError("Auth_Container_LDAP: Could not bind to LDAP server.", 41);
        }
        $this->log('Binding was successful', AUTH_LOG_DEBUG);

        return true;
    }

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Auth_Container_LDAP::_disconnect

(

)

Disconnects (unbinds) from ldap server.

private

Definition at line 349 of file LDAP.php.

References _isValidLink(), AUTH_LOG_DEBUG, and Auth_Container\log().

Referenced by _connect(), and fetchData().

    {
        $this->log('Auth_Container_LDAP::_disconnect() called.', AUTH_LOG_DEBUG);
        if ($this->_isValidLink()) {
            $this->log('disconnecting from server');
            @ldap_unbind($this->conn_id);
        }
    }

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Auth_Container_LDAP::_getBaseDN

(

)

Tries to find Basedn via namingContext Attribute.

private

Definition at line 366 of file LDAP.php.

References _isValidLink(), _prepare(), AUTH_LOG_DEBUG, Auth_Container\log(), and PEAR\raiseError().

Referenced by fetchData().

    {
        $this->log('Auth_Container_LDAP::_getBaseDN() called.', AUTH_LOG_DEBUG);
        $err = $this->_prepare();
        if ($err !== true) {
            return PEAR::raiseError($err->getMessage(), $err->getCode());
        }

        if ($this->options['basedn'] == "" && $this->_isValidLink()) {
            $this->log("basedn not set, searching via namingContexts.", AUTH_LOG_DEBUG);

            $result_id = @ldap_read($this->conn_id, "", "(objectclass=*)", array("namingContexts"));

            if (@ldap_count_entries($this->conn_id, $result_id) == 1) {

                $this->log("got result for namingContexts", AUTH_LOG_DEBUG);

                $entry_id = @ldap_first_entry($this->conn_id, $result_id);
                $attrs = @ldap_get_attributes($this->conn_id, $entry_id);
                $basedn = $attrs['namingContexts'][0];

                if ($basedn != "") {
                    $this->log("result for namingContexts was $basedn", AUTH_LOG_DEBUG);
                    $this->options['basedn'] = $basedn;
                }
            }
            @ldap_free_result($result_id);
        }

        // if base ist still not set, raise error
        if ($this->options['basedn'] == "") {
            return PEAR::raiseError("Auth_Container_LDAP: LDAP search base not specified!", 41);
        }
        return true;
    }

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Auth_Container_LDAP::_isValidLink

(

)

determines whether there is a valid ldap conenction or not

private

Returns

boolean

Definition at line 411 of file LDAP.php.

Referenced by _disconnect(), _getBaseDN(), and _prepare().

    {
        if (is_resource($this->conn_id)) {
            if (get_resource_type($this->conn_id) == 'ldap link') {
                return true;
            }
        }
        return false;
    }

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Auth_Container_LDAP::_parseOptions

(

$array

)

Parse options passed to the container class.

private

Parameters

array

Definition at line 466 of file LDAP.php.

References _setV12OptionsToV13().

Referenced by Auth_Container_LDAP().

    {
        $array = $this->_setV12OptionsToV13($array);

        foreach ($array as $key => $value) {
            if (array_key_exists($key, $this->options)) {
                if ($key == 'attributes') {
                    if (is_array($value)) {
                        $this->options[$key] = $value;
                    } else {
                        $this->options[$key] = explode(',', $value);
                    }
                } else {
                    $this->options[$key] = $value;
                }
            }
        }
    }

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Auth_Container_LDAP::_prepare

(

)

Prepare LDAP connection.

This function checks if we have already opened a connection to the LDAP server. If that's not the case, a new connection is opened.

private

Returns

mixed True or a PEAR error object.

Definition at line 256 of file LDAP.php.

References $res, _connect(), _isValidLink(), and PEAR\isError().

Referenced by _getBaseDN(), checkGroup(), and fetchData().

    {
        if (!$this->_isValidLink()) {
            $res = $this->_connect();
            if (PEAR::isError($res)) {
                return $res;
            }
        }
        return true;
    }

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Auth_Container_LDAP::_quoteFilterString

(

$filter_str

)

Escapes LDAP filter special characters as defined in RFC 2254.

private

Parameters

string

Filter String

Definition at line 755 of file LDAP.php.

Referenced by checkGroup(), and fetchData().

    {
        $metas        = array(  '\\',  '*',  '(',  ')',   "\x00");
        $quoted_metas = array('\\\\', '\*', '\(', '\)', "\\\x00");
        return str_replace($metas, $quoted_metas, $filter_str);
    }

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Auth_Container_LDAP::_scope2function

(

$scope

)

Get search function for scope.

Parameters

string

scope

Returns

string ldap search function

Definition at line 517 of file LDAP.php.

Referenced by checkGroup(), and fetchData().

    {
        switch($scope) {
        case 'one':
            $function = 'ldap_list';
            break;
        case 'base':
            $function = 'ldap_read';
            break;
        default:
            $function = 'ldap_search';
            break;
        }
        return $function;
    }

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Auth_Container_LDAP::_setDefaults

(

)

Set some default options.

private

Definition at line 429 of file LDAP.php.

Referenced by Auth_Container_LDAP().

    {
        $this->options['url']         = '';
        $this->options['host']        = 'localhost';
        $this->options['port']        = '389';
        $this->options['version']     = 2;
        $this->options['referrals']   = true;
        $this->options['binddn']      = '';
        $this->options['bindpw']      = '';
        $this->options['basedn']      = '';
        $this->options['userdn']      = '';
        $this->options['userscope']   = 'sub';
        $this->options['userattr']    = 'uid';
        $this->options['userfilter']  = '(objectClass=posixAccount)';
        $this->options['attributes']  = array(''); // no attributes
        $this->options['attrformat']  = 'AUTH'; // returns attribute like other Auth containers
        $this->options['group']       = '';
        $this->options['groupdn']     = '';
        $this->options['groupscope']  = 'sub';
        $this->options['groupattr']   = 'cn';
        $this->options['groupfilter'] = '(objectClass=groupOfUniqueNames)';
        $this->options['memberattr']  = 'uniqueMember';
        $this->options['memberisdn']  = true;
        $this->options['start_tls']   = false;
        $this->options['debug']       = false;
        $this->options['try_all']     = false; // Try all user ids returned not just the first one
    }

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Auth_Container_LDAP::_setV12OptionsToV13

(

$array

)

Adapt deprecated options from Auth 1.2 LDAP to Auth 1.3 LDAP.

Author

Hugues Peeters hugue.nosp@m.s.pe.nosp@m.eters.nosp@m.@cla.nosp@m.rolin.nosp@m.e.ne.nosp@m.t private

Parameters

array

Returns

array

Definition at line 496 of file LDAP.php.

Referenced by _parseOptions().

    {
        if (isset($array['useroc']))
            $array['userfilter'] = "(objectClass=".$array['useroc'].")";
        if (isset($array['groupoc']))
            $array['groupfilter'] = "(objectClass=".$array['groupoc'].")";
        if (isset($array['scope']))
            $array['userscope'] = $array['scope'];

        return $array;
    }

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Auth_Container_LDAP::Auth_Container_LDAP

(

$params

)

Constructor of the container class.

Parameters

$params,associative

hash with host,port,basedn and userattr key

Returns

object Returns an error object if something went wrong

Definition at line 230 of file LDAP.php.

References _parseOptions(), _setDefaults(), PEAR_ERROR_DIE, and PEAR\raiseError().

    {
        if (false === extension_loaded('ldap')) {
            return PEAR::raiseError('Auth_Container_LDAP: LDAP Extension not loaded',
                    41, PEAR_ERROR_DIE);
        }

        $this->_setDefaults();

        if (is_array($params)) {
            $this->_parseOptions($params);
        }
    }

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Auth_Container_LDAP::checkGroup

(

$user

)

Validate group membership.

Searches the LDAP server for group membership of the supplied username. Quotes all LDAP filter meta characters in the user name before querying the LDAP server.

Parameters

string

Distinguished Name of the authenticated User

Returns

boolean

Reimplemented in ilAuthContainerLDAP.

Definition at line 704 of file LDAP.php.

References _prepare(), _quoteFilterString(), _scope2function(), AUTH_LOG_DEBUG, Auth_Container\log(), and PEAR\raiseError().

Referenced by fetchData().

    {
        $this->log('Auth_Container_LDAP::checkGroup() called.', AUTH_LOG_DEBUG);
        $err = $this->_prepare();
        if ($err !== true) {
            return PEAR::raiseError($err->getMessage(), $err->getCode());
        }

        // make filter
        $filter = sprintf('(&(%s=%s)(%s=%s)%s)',
                          $this->options['groupattr'],
                          $this->options['group'],
                          $this->options['memberattr'],
                          $this->_quoteFilterString($user),
                          $this->options['groupfilter']);

        // make search base dn
        $search_basedn = $this->options['groupdn'];
        if ($search_basedn != '' && substr($search_basedn, -1) != ',') {
            $search_basedn .= ',';
        }
        $search_basedn .= $this->options['basedn'];

        $func_params = array($this->conn_id, $search_basedn, $filter,
                             array($this->options['memberattr']));
        $func_name = $this->_scope2function($this->options['groupscope']);

        $this->log("Searching with $func_name and filter $filter in $search_basedn", AUTH_LOG_DEBUG);

        // search
        if (($result_id = @call_user_func_array($func_name, $func_params)) != false) {
            if (@ldap_count_entries($this->conn_id, $result_id) == 1) {
                @ldap_free_result($result_id);
                $this->log('User is member of group', AUTH_LOG_DEBUG);
                return true;
            }
        }
        // default
        $this->log('User is NOT member of group', AUTH_LOG_DEBUG);
        return false;
    }

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Auth_Container_LDAP::fetchData	(		$username,
			$password
	)

Fetch data from LDAP server.

Searches the LDAP server for the given username/password combination. Escapes all LDAP meta characters in username before performing the query.

Parameters

string	Username
string	Password

Returns

boolean

Reimplemented in ilAuthContainerLDAP.

Definition at line 547 of file LDAP.php.

References _disconnect(), _getBaseDN(), _prepare(), _quoteFilterString(), _scope2function(), AUTH_LOG_DEBUG, checkGroup(), Auth_Container\log(), and PEAR\raiseError().

    {
        $this->log('Auth_Container_LDAP::fetchData() called.', AUTH_LOG_DEBUG);
        $err = $this->_prepare();
        if ($err !== true) {
            return PEAR::raiseError($err->getMessage(), $err->getCode());
        }

        $err = $this->_getBaseDN();
        if ($err !== true) {
            return PEAR::raiseError($err->getMessage(), $err->getCode());
        }

        // UTF8 Encode username for LDAPv3
        if (@ldap_get_option($this->conn_id, LDAP_OPT_PROTOCOL_VERSION, $ver) && $ver == 3) {
            $this->log('UTF8 encoding username for LDAPv3', AUTH_LOG_DEBUG);
            $username = utf8_encode($username);
        }

        // make search filter
        $filter = sprintf('(&(%s=%s)%s)',
                          $this->options['userattr'],
                          $this->_quoteFilterString($username),
                          $this->options['userfilter']);

        // make search base dn
        $search_basedn = $this->options['userdn'];
        if ($search_basedn != '' && substr($search_basedn, -1) != ',') {
            $search_basedn .= ',';
        }
        $search_basedn .= $this->options['basedn'];

        // attributes
        $searchAttributes = $this->options['attributes'];

        // make functions params array
        $func_params = array($this->conn_id, $search_basedn, $filter, $searchAttributes);

        // search function to use
        $func_name = $this->_scope2function($this->options['userscope']);

        $this->log("Searching with $func_name and filter $filter in $search_basedn", AUTH_LOG_DEBUG);

        // search
        if (($result_id = @call_user_func_array($func_name, $func_params)) === false) {
            $this->log('User not found', AUTH_LOG_DEBUG);
        } elseif (@ldap_count_entries($this->conn_id, $result_id) >= 1) { // did we get some possible results?

            $this->log('User(s) found', AUTH_LOG_DEBUG);

            $first = true;
            $entry_id = null;

            do {

                // then get the user dn
                if ($first) {
                    $entry_id = @ldap_first_entry($this->conn_id, $result_id);
                    $first = false;
                } else {
                    $entry_id = @ldap_next_entry($this->conn_id, $entry_id);
                    if ($entry_id === false)
                        break;
                }
                $user_dn  = @ldap_get_dn($this->conn_id, $entry_id);

                // as the dn is not fetched as an attribute, we save it anyway
                if (is_array($searchAttributes) && in_array('dn', $searchAttributes)) {
                    $this->log('Saving DN to AuthData', AUTH_LOG_DEBUG);
                    $this->_auth_obj->setAuthData('dn', $user_dn);
                }

                // fetch attributes
                if ($attributes = @ldap_get_attributes($this->conn_id, $entry_id)) {

                    if (is_array($attributes) && isset($attributes['count']) &&
                         $attributes['count'] > 0) {

                        // ldap_get_attributes() returns a specific multi dimensional array
                        // format containing all the attributes and where each array starts
                        // with a 'count' element providing the number of attributes in the
                        // entry, or the number of values for attribute. For compatibility
                        // reasons, it remains the default format returned by LDAP container
                        // setAuthData().
                        // The code below optionally returns attributes in another format,
                        // more compliant with other Auth containers, where each attribute
                        // element are directly set in the 'authData' list. This option is
                        // enabled by setting 'attrformat' to
                        // 'AUTH' in the 'options' array.
                        // eg. $this->options['attrformat'] = 'AUTH'

                        if ( strtoupper($this->options['attrformat']) == 'AUTH' ) {
                            $this->log('Saving attributes to Auth data in AUTH format', AUTH_LOG_DEBUG);
                            unset ($attributes['count']);
                            foreach ($attributes as $attributeName => $attributeValue ) {
                                if (is_int($attributeName)) continue;
                                if (is_array($attributeValue) && isset($attributeValue['count'])) {
                                    unset ($attributeValue['count']);
                                }
                                if (count($attributeValue)<=1) $attributeValue = $attributeValue[0];
                                $this->log('Storing additional field: '.$attributeName, AUTH_LOG_DEBUG);
                                $this->_auth_obj->setAuthData($attributeName, $attributeValue);
                            }
                        }
                        else
                        {
                            $this->log('Saving attributes to Auth data in LDAP format', AUTH_LOG_DEBUG);
                            $this->_auth_obj->setAuthData('attributes', $attributes);
                        }
                    }
                }
                @ldap_free_result($result_id);

                // need to catch an empty password as openldap seems to return TRUE
                // if anonymous binding is allowed
                if ($password != "") {
                    $this->log("Bind as $user_dn", AUTH_LOG_DEBUG);

                    // try binding as this user with the supplied password
                    if (@ldap_bind($this->conn_id, $user_dn, $password)) {
                        $this->log('Bind successful', AUTH_LOG_DEBUG);

                        // check group if appropiate
                        if (strlen($this->options['group'])) {
                            // decide whether memberattr value is a dn or the username
                            $this->log('Checking group membership', AUTH_LOG_DEBUG);
                            $return = $this->checkGroup(($this->options['memberisdn']) ? $user_dn : $username);
                            $this->_disconnect();
                            return $return;
                        } else {
                            $this->log('Authenticated', AUTH_LOG_DEBUG);
                            $this->_disconnect();
                            return true; // user authenticated
                        } // checkGroup
                    } // bind
                } // non-empty password
            } while ($this->options['try_all'] == true); // interate through entries
        } // get results
        // default
        $this->log('NOT authenticated!', AUTH_LOG_DEBUG);
        $this->_disconnect();
        return false;
    }

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Field Documentation

Auth_Container_LDAP::$conn_id = false

Definition at line 218 of file LDAP.php.

Auth_Container_LDAP::$options = array()

Definition at line 212 of file LDAP.php.

---

The documentation for this class was generated from the following file:

• Services/PEAR/lib/Auth/Container/LDAP.php