modules/Users/authentication/LDAPAuthenticate/LDAPAuthenticateUser.php

   1 <?php
   2 if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
   3 /*********************************************************************************
   4  * SugarCRM Community Edition is a customer relationship management program developed by
   5  * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU Affero General Public License version 3 as published by the
   9  * Free Software Foundation with the addition of the following permission added
  10  * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
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  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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  17  * details.
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  27  * The interactive user interfaces in modified source and object code versions
  28  * of this program must display Appropriate Legal Notices, as required under
  29  * Section 5 of the GNU Affero General Public License version 3.
  30  *
  31  * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
  32  * these Appropriate Legal Notices must retain the display of the "Powered by
  33  * SugarCRM" logo. If the display of the logo is not reasonably feasible for
  34  * technical reasons, the Appropriate Legal Notices must display the words
  35  * "Powered by SugarCRM".
  36  ********************************************************************************/
  37
  38
  39
  40
  41 /**
  42  * This file is where the user authentication occurs. No redirection should happen in this file.
  43  *
  44  */
  45 require_once('modules/Users/authentication/LDAPAuthenticate/LDAPConfigs/default.php');
  46 require_once('modules/Users/authentication/SugarAuthenticate/SugarAuthenticateUser.php');
  47
  48 define('DEFAULT_PORT', 389);
  49 class LDAPAuthenticateUser extends SugarAuthenticateUser{
  50
  51         /**
  52          * Does the actual authentication of the user and returns an id that will be used
  53          * to load the current user (loadUserOnSession)
  54          *
  55          * @param STRING $name
  56          * @param STRING $password
  57          * @return STRING id - used for loading the user
  58          *
  59          * Contributions by Erik Mitchell erikm@logicpd.com
  60          */
  61         function authenticateUser($name, $password) {
  62
  63                 $server = $GLOBALS['ldap_config']->settings['ldap_hostname'];
  64                 $port = $GLOBALS['ldap_config']->settings['ldap_port'];
  65                 if(!$port)
  66                         $port = DEFAULT_PORT;
  67                 $GLOBALS['log']->debug("ldapauth: Connecting to LDAP server: $server");
  68                 $ldapconn = ldap_connect($server, $port);
  69                  $error = ldap_errno($ldapconn);
  70                 if($this->loginError($error)){
  71                         return '';
  72                 }
  73                 @ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
  74                 @ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0); // required for AD
  75                 // If constant is defined, set the timeout (PHP >= 5.3)
  76                 if (defined('LDAP_OPT_NETWORK_TIMEOUT'))
  77                 {
  78                         // Network timeout, lower than PHP and DB timeouts
  79                         @ldap_set_option($ldapconn, LDAP_OPT_NETWORK_TIMEOUT, 60);
  80                 }
  81
  82                 $bind_user = $this->ldap_rdn_lookup($name, $password);
  83                 $GLOBALS['log']->debug("ldapauth.ldap_authenticate_user: ldap_rdn_lookup returned bind_user=" . $bind_user);
  84                 if (!$bind_user) {
  85                         $GLOBALS['log']->fatal("SECURITY: ldapauth: failed LDAP bind (login) by " .
  86                                                                         $name . ", could not construct bind_user");
  87                         return '';
  88                 }
  89
  90                 // MRF - Bug #18578 - punctuation was being passed as HTML entities, i.e. &amp;
  91                 $bind_password = html_entity_decode($password,ENT_QUOTES);
  92                 $GLOBALS['log']->info("ldapauth: Binding user " . $bind_user);
  93
  94                 $bind = ldap_bind($ldapconn, $bind_user, $bind_password);
  95                  $error = ldap_errno($ldapconn);
  96         if($this->loginError($error)){
  97                         $GLOBALS['log']->fatal('[LDAP] ATTEMPTING BIND USING BASE DN PARAMS');
  98                                 $bind = ldap_bind($ldapconn, $GLOBALS['ldap_config']->settings['ldap_bind_attr'] . "=" . $bind_user . "," . $GLOBALS['ldap_config']->settings['ldap_base_dn'], $bind_password);
  99                                 $error = ldap_errno($ldapconn);
 100                                 if($this->loginError($error)){
 101                                 return '';
 102                                 }
 103                 }
 104
 105                 $GLOBALS['log']->info("ldapauth: Bind attempt complete.");
 106
 107                 if ($bind) {
 108                         // Authentication succeeded, get info from LDAP directory
 109                         $attrs = array_keys($GLOBALS['ldapConfig']['users']['fields']);
 110                         $base_dn = $GLOBALS['ldap_config']->settings['ldap_base_dn'];
 111                         $name_filter = $this->getUserNameFilter($name);
 112
 113                         //add the group user attribute that we will compare to the group attribute for membership validation if group membership is turned on
 114                         if(!empty($GLOBALS['ldap_config']->settings['ldap_group']) && !empty($GLOBALS['ldap_config']->settings['ldap_group_user_attr']) && !empty($GLOBALS['ldap_config']->settings['ldap_group_attr'])){
 115                                 if(!in_array($attrs, $GLOBALS['ldap_config']->settings['ldap_group_user_attr'])){
 116                                         $attrs[] = $GLOBALS['ldap_config']->settings['ldap_group_user_attr'];
 117                                 }
 118                         }
 119
 120                         $GLOBALS['log']->debug("ldapauth: Fetching user info from Directory.");
 121                         $result = @ldap_search($ldapconn, $base_dn, $name_filter, $attrs);
 122                         $error = ldap_errno($ldapconn);
 123                          if($this->loginError($error)){
 124                         return '';
 125                         }
 126                         $GLOBALS['log']->debug("ldapauth: ldap_search complete.");
 127
 128                         $info = @ldap_get_entries($ldapconn, $result);
 129                          $error = ldap_errno($ldapconn);
 130                 if($this->loginError($error)){
 131                         return '';
 132                         }
 133
 134
 135
 136                         $GLOBALS['log']->debug("ldapauth: User info from Directory fetched.");
 137
 138                         // some of these don't seem to work
 139                         $this->ldapUserInfo = array();
 140                         foreach($GLOBALS['ldapConfig']['users']['fields'] as $key=>$value){
 141                                 //MRF - BUG:19765
 142                                 $key = strtolower($key);
 143                                 if(isset($info[0]) && isset($info[0][$key]) && isset($info[0][$key][0])){
 144                                         $this->ldapUserInfo[$value] = $info[0][$key][0];
 145                                 }
 146                         }
 147
 148                         //we should check that a user is a member of a specific group
 149                         if(!empty($GLOBALS['ldap_config']->settings['ldap_group'])){
 150                                 $GLOBALS['log']->debug("LDAPAuth: scanning group for user membership");
 151                                 $group_user_attr = $GLOBALS['ldap_config']->settings['ldap_group_user_attr'];
 152                                 $group_attr = $GLOBALS['ldap_config']->settings['ldap_group_attr'];
 153                                 if(!isset($info[0][$group_user_attr])){
 154                                         $GLOBALS['log']->fatal("ldapauth: $group_user_attr not found for user $name cannot authenticate against an LDAP group");
 155                                         ldap_close($ldapconn);
 156                                         return '';
 157                                 }else{
 158                                         $user_uid = $info[0][$group_user_attr];
 159                                 }
 160                                 //user is not a member of the group if the count is zero get the logs and return no id so it fails login
 161                                 if(!isset($user_uid[0]) || ldap_count_entries($ldapconn, ldap_search($ldapconn,$GLOBALS['ldap_config']->settings['ldap_group_name'] . ",". $GLOBALS['ldap_config']->settings['ldap_group_dn']  ,"($group_attr=" . $user_uid[0] . ")")) ==  0){
 162                                         $GLOBALS['log']->fatal("ldapauth: User ($name) is not a member of the LDAP group");
 163                                         $user_id = var_export($user_uid, true);
 164                                         $GLOBALS['log']->debug("ldapauth: Group DN:{$GLOBALS['ldap_config']->settings['ldap_group_dn']} Group Name: " . $GLOBALS['ldap_config']->settings['ldap_group_name']  . " Group Attribute: $group_attr  User Attribute: $group_user_attr :(" . $user_uid[0] . ")");
 165                                         ldap_close($ldapconn);
 166                                         return '';
 167                                 }
 168
 169
 170                         }
 171
 172
 173
 174                         ldap_close($ldapconn);
 175                         $dbresult = $GLOBALS['db']->query("SELECT id, status FROM users WHERE user_name='" . $name . "' AND deleted = 0");
 176
 177                         //user already exists use this one
 178                         if($row = $GLOBALS['db']->fetchByAssoc($dbresult)){
 179                                 if($row['status'] != 'Inactive')
 180                                         return $row['id'];
 181                                 else
 182                                         return '';
 183                         }
 184
 185                         //create a new user and return the user
 186                         if($GLOBALS['ldap_config']->settings['ldap_auto_create_users']){
 187                                 return $this->createUser($name);
 188
 189                         }
 190                         return '';
 191
 192                 } else {
 193                         $GLOBALS['log']->fatal("SECURITY: failed LDAP bind (login) by $this->user_name using bind_user=$bind_user");
 194                         $GLOBALS['log']->fatal("ldapauth: failed LDAP bind (login) by $this->user_name using bind_user=$bind_user");
 195                         ldap_close($ldapconn);
 196                         return '';
 197                 }
 198         }
 199
 200         /**
 201          * takes in a name and creates the appropriate search filter for that user name including any additional filters specified in the system settings page
 202          * @param $name
 203          * @return String
 204          */
 205         function getUserNameFilter($name){
 206                         $name_filter = "(" . $GLOBALS['ldap_config']->settings['ldap_login_attr']. "=" . $name . ")";
 207                         //add the additional user filter if it is specified
 208                         if(!empty($GLOBALS['ldap_config']->settings['ldap_login_filter'])){
 209                                 $add_filter = $GLOBALS['ldap_config']->settings['ldap_login_filter'];
 210                                 if(substr($add_filter, 0, 1) !== "("){
 211                                         $add_filter = "(" . $add_filter . ")";
 212                                 }
 213                                 $name_filter = "(&" . $name_filter . $add_filter . ")";
 214                         }
 215                         return $name_filter;
 216         }
 217
 218         /**
 219          * Creates a user with the given User Name and returns the id of that new user
 220          * populates the user with what was set in ldapUserInfo
 221          *
 222          * @param STRING $name
 223          * @return STRING $id
 224          */
 225         function createUser($name){
 226
 227                         $user = new User();
 228                         $user->user_name = $name;
 229                         foreach($this->ldapUserInfo as $key=>$value){
 230                                 $user->$key = $value;
 231                         }
 232                         $user->employee_status = 'Active';
 233                         $user->status = 'Active';
 234                         $user->is_admin = 0;
 235                         $user->external_auth_only = 1;
 236                         $user->save();
 237                         return $user->id;
 238
 239         }
 240         /**
 241          * this is called when a user logs in
 242          *
 243          * @param STRING $name
 244          * @param STRING $password
 245          * @return boolean
 246          */
 247         function loadUserOnLogin($name, $password) {
 248
 249             global $mod_strings;
 250
 251             // Check if the LDAP extensions are loaded
 252             if(!function_exists('ldap_connect')) {
 253                $error = $mod_strings['LBL_LDAP_EXTENSION_ERROR'];
 254                $GLOBALS['log']->fatal($error);
 255                $_SESSION['login_error'] = $error;
 256                return false;
 257             }
 258
 259                 global $login_error;
 260                 $GLOBALS['ldap_config']  = new Administration();
 261                 $GLOBALS['ldap_config']->retrieveSettings('ldap');
 262                 $GLOBALS['log']->debug("Starting user load for ". $name);
 263                 if(empty($name) || empty($password)) return false;
 264                 checkAuthUserStatus();
 265
 266                 $user_id = $this->authenticateUser($name, $password);
 267                 if(empty($user_id)) {
 268                         //check if the user can login as a normal sugar user
 269                         $GLOBALS['log']->fatal('SECURITY: User authentication for '.$name.' failed');
 270                         return false;
 271                 }
 272                 $this->loadUserOnSession($user_id);
 273                 return true;
 274         }
 275
 276
 277         /**
 278          * Called with the error number of the last call if the error number is 0
 279          * there was no error otherwise it converts the error to a string and logs it as fatal
 280          *
 281          * @param INT $error
 282          * @return boolean
 283          */
 284         function loginError($error){
 285                 if(empty($error)) return false;
 286                 $errorstr = ldap_err2str($error);
 287                 // BEGIN SUGAR INT
 288                 $_SESSION['login_error'] = $errorstr;
 289                 /*
 290                 // END SUGAR INT
 291                 $_SESSION['login_error'] = translate('ERR_INVALID_PASSWORD', 'Users');
 292                 // BEGIN SUGAR INT
 293                 */
 294                 // END SUGAR INT
 295                 $GLOBALS['log']->fatal('[LDAP ERROR]['. $error . ']'.$errorstr);
 296                 return true;
 297         }
 298
 299          /**
 300     * @return string appropriate value for username when binding to directory server.
 301     * @param string $user_name the value provided in login form
 302     * @desc Take the login username and return either said username for AD or lookup
 303      * distinguished name using anonymous credentials for OpenLDAP.
 304      * Contributions by Erik Mitchell erikm@logicpd.com
 305     */
 306     function ldap_rdn_lookup($user_name, $password) {
 307
 308         // MFH BUG# 14547 - Added htmlspecialchars_decode()
 309         $server = $GLOBALS['ldap_config']->settings['ldap_hostname'];
 310         $base_dn = htmlspecialchars_decode($GLOBALS['ldap_config']->settings['ldap_base_dn']);
 311                 if(!empty($GLOBALS['ldap_config']->settings['ldap_authentication'])){
 312                 $admin_user = htmlspecialchars_decode($GLOBALS['ldap_config']->settings['ldap_admin_user']);
 313                 $admin_password = htmlspecialchars_decode($GLOBALS['ldap_config']->settings['ldap_admin_password']);
 314                 }else{
 315                         $admin_user = '';
 316                 $admin_password = '';
 317                 }
 318         $user_attr = $GLOBALS['ldap_config']->settings['ldap_login_attr'];
 319         $bind_attr = $GLOBALS['ldap_config']->settings['ldap_bind_attr'];
 320         $port = $GLOBALS['ldap_config']->settings['ldap_port'];
 321                 if(!$port)
 322                         $port = DEFAULT_PORT;
 323         $ldapconn = ldap_connect($server, $port);
 324         $error = ldap_errno($ldapconn);
 325         if($this->loginError($error)){
 326                 return false;
 327                 }
 328         ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
 329         ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0); // required for AD
 330         //if we are going to connect anonymously lets at least try to connect with the user connecting
 331         if(empty($admin_user)){
 332                         $bind = @ldap_bind($ldapconn, $user_name, $password);
 333                 $error = ldap_errno($ldapconn);
 334         }
 335         if(empty($bind)){
 336                 $bind = @ldap_bind($ldapconn, $admin_user, $admin_password);
 337                 $error = ldap_errno($ldapconn);
 338         }
 339
 340         if($this->loginError($error)){
 341                 return false;
 342                 }
 343         if (!$bind) {
 344                    $GLOBALS['log']->warn("ldapauth.ldap_rdn_lookup: Could not bind with admin user, trying to bind anonymously");
 345             $bind = @ldap_bind($ldapconn);
 346              $error = ldap_errno($ldapconn);
 347
 348                  if($this->loginError($error)){
 349                         return false;
 350                         }
 351             if (!$bind) {
 352                         $GLOBALS['log']->warn("ldapauth.ldap_rdn_lookup: Could not bind anonymously, returning username");
 353                         return $user_name;
 354             }
 355         }
 356
 357                 // If we get here we were able to bind somehow
 358         $search_filter = $this->getUserNameFilter($user_name);
 359
 360         $GLOBALS['log']->info("ldapauth.ldap_rdn_lookup: Bind succeeded, searching for $user_attr=$user_name");
 361         $GLOBALS['log']->debug("ldapauth.ldap_rdn_lookup: base_dn:$base_dn , search_filter:$search_filter");
 362
 363         $result = @ldap_search($ldapconn, $base_dn , $search_filter, array("dn", $bind_attr));
 364          $error = ldap_errno($ldapconn);
 365          if($this->loginError($error)){
 366                 return false;
 367                 }
 368         $info = ldap_get_entries($ldapconn, $result);
 369          if($info['count'] == 0){
 370
 371                 return false;
 372
 373         }
 374         ldap_unbind($ldapconn);
 375
 376         $GLOBALS['log']->info("ldapauth.ldap_rdn_lookup: Search result:\nldapauth.ldap_rdn_lookup: " . count($info));
 377
 378         if ($bind_attr == "dn") {
 379                         $found_bind_user = $info[0]['dn'];
 380         } else {
 381                 $found_bind_user = $info[0][strtolower($bind_attr)][0];
 382         }
 383
 384         $GLOBALS['log']->info("ldapauth.ldap_rdn_lookup: found_bind_user=" . $found_bind_user);
 385
 386         if (!empty($found_bind_user)) {
 387             return $found_bind_user;
 388         } elseif ($user_attr == $bind_attr) {
 389             return $user_name;
 390         } else {
 391             return false;
 392         }
 393     }
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403 }
 404
 405 ?>