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PhabricatorLDAPProvider.php
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Tue, Feb 4, 21:58

PhabricatorLDAPProvider.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
final class PhabricatorLDAPProvider {
// http://www.php.net/manual/en/function.ldap-errno.php#20665 states
// that the number could be 31 or 49, in testing it has always been 49
const LDAP_INVALID_CREDENTIALS = 49;
private $userData;
private $connection;
public function __construct() {
}
public function __destruct() {
if (isset($this->connection)) {
ldap_unbind($this->connection);
}
}
public function isProviderEnabled() {
return PhabricatorEnv::getEnvConfig('ldap.auth-enabled');
}
public function getHostname() {
return PhabricatorEnv::getEnvConfig('ldap.hostname');
}
public function getBaseDN() {
return PhabricatorEnv::getEnvConfig('ldap.base_dn');
}
public function getSearchAttribute() {
return PhabricatorEnv::getEnvConfig('ldap.search_attribute');
}
public function getUsernameAttribute() {
return PhabricatorEnv::getEnvConfig('ldap.username-attribute');
}
public function getLDAPVersion() {
return PhabricatorEnv::getEnvConfig('ldap.version');
}
public function getLDAPReferrals() {
return PhabricatorEnv::getEnvConfig('ldap.referrals');
}
public function retrieveUserEmail() {
return $this->userData['mail'][0];
}
public function retrieveUserRealName() {
return $this->retrieveUserRealNameFromData($this->userData);
}
public function retrieveUserRealNameFromData($data) {
$name_attributes = PhabricatorEnv::getEnvConfig(
'ldap.real_name_attributes');
$real_name = '';
if (is_array($name_attributes)) {
foreach ($name_attributes AS $attribute) {
if (isset($data[$attribute][0])) {
$real_name .= $data[$attribute][0] . ' ';
}
}
trim($real_name);
} else if (isset($data[$name_attributes][0])) {
$real_name = $data[$name_attributes][0];
}
if ($real_name == '') {
return null;
}
return $real_name;
}
public function retrieveUsername() {
return $this->userData[$this->getSearchAttribute()][0];
}
public function getConnection() {
if (!isset($this->connection)) {
$this->connection = ldap_connect($this->getHostname());
if (!$this->connection) {
throw new Exception('Could not connect to LDAP host at ' .
$this->getHostname());
}
ldap_set_option($this->connection, LDAP_OPT_PROTOCOL_VERSION,
$this->getLDAPVersion());
ldap_set_option($this->connection, LDAP_OPT_REFERRALS,
$this->getLDAPReferrals());
}
return $this->connection;
}
public function getUserData() {
return $this->userData;
}
private function invalidLDAPUserErrorMessage($errno, $errmsg) {
return "LDAP Error #".$errno.": ".$errmsg;
}
public function auth($username, PhutilOpaqueEnvelope $password) {
if (strlen(trim($username)) == 0) {
throw new Exception('Username can not be empty');
}
if (PhabricatorEnv::getEnvConfig('ldap.search-first')) {
// To protect against people phishing for accounts we catch the
// exception and present the default exception that would be presented
// in the case of a failed bind.
try {
$user = $this->getUser($this->getUsernameAttribute(), $username);
$username = $user[$this->getSearchAttribute()][0];
} catch (PhabricatorLDAPUnknownUserException $e) {
throw new Exception(
$this->invalidLDAPUserErrorMessage(
self::LDAP_INVALID_CREDENTIALS,
ldap_err2str(self::LDAP_INVALID_CREDENTIALS)));
}
}
$conn = $this->getConnection();
$activeDirectoryDomain =
PhabricatorEnv::getEnvConfig('ldap.activedirectory_domain');
if ($activeDirectoryDomain) {
$dn = $username . '@' . $activeDirectoryDomain;
} else {
$dn = ldap_sprintf(
'%Q=%s,%Q',
$this->getSearchAttribute(),
$username,
$this->getBaseDN());
}
// NOTE: It is very important we suppress any messages that occur here,
// because it logs passwords if it reaches an error log of any sort.
DarkConsoleErrorLogPluginAPI::enableDiscardMode();
$result = @ldap_bind($conn, $dn, $password->openEnvelope());
DarkConsoleErrorLogPluginAPI::disableDiscardMode();
if (!$result) {
throw new Exception(
$this->invalidLDAPUserErrorMessage(
ldap_errno($conn),
ldap_error($conn)));
}
$this->userData = $this->getUser($this->getSearchAttribute(), $username);
return $this->userData;
}
private function getUser($attribute, $username) {
$conn = $this->getConnection();
$query = ldap_sprintf(
'%Q=%S',
$attribute,
$username);
$result = ldap_search($conn, $this->getBaseDN(), $query);
if (!$result) {
throw new Exception('Search failed. Please check your LDAP and HTTP '.
'logs for more information.');
}
$entries = ldap_get_entries($conn, $result);
if ($entries === false) {
throw new Exception('Could not get entries');
}
if ($entries['count'] > 1) {
throw new Exception('Found more then one user with this ' .
$attribute);
}
if ($entries['count'] == 0) {
throw new PhabricatorLDAPUnknownUserException('Could not find user');
}
return $entries[0];
}
public function search($query) {
$result = ldap_search($this->getConnection(), $this->getBaseDN(),
$query);
if (!$result) {
throw new Exception('Search failed. Please check your LDAP and HTTP '.
'logs for more information.');
}
$entries = ldap_get_entries($this->getConnection(), $result);
if ($entries === false) {
throw new Exception('Could not get entries');
}
if ($entries['count'] == 0) {
throw new Exception('No results found');
}
$rows = array();
for($i = 0; $i < $entries['count']; $i++) {
$row = array();
$entry = $entries[$i];
// Get username, email and realname
$username = $entry[$this->getSearchAttribute()][0];
if(empty($username)) {
continue;
}
$row[] = $username;
$row[] = $entry['mail'][0];
$row[] = $this->retrieveUserRealNameFromData($entry);
$rows[] = $row;
}
return $rows;
}
}

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