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      <?php
 
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      /*
 
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       * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 
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       *
 
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       * This program is free software: you can redistribute it and/or modify
 
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       * it under the terms of the GNU General Public License as published by
 
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       * the Free Software Foundation, either version 3 of the License, or
 
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       * (at your option) any later version.
 
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       *
 
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       * This program is distributed in the hope that it will be useful,
 
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       * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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       * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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       * GNU General Public License for more details.
 
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       *
 
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       * You should have received a copy of the GNU General Public License
 
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       * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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       */
 
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      /**
 
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       * SecureTokens.php
 
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       *
 
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       * @category      Core
 
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       * @package       Core_Security
 
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       * @subpackage    WB-2.8.4 and up
 
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       * @copyright     Manuela v.d.Decken <manuela@isteam.de>
 
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       * @author        Manuela v.d.Decken <manuela@isteam.de>
 
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       * @license       http://www.gnu.org/licenses/gpl.html   GPL License
 
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       * @
 
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       * @version       0.1.2
 
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       * @revision      $Revision: 2 $
 
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       * @link          $HeadURL: svn://isteam.dynxs.de/wb/2.10.x/trunk/framework/SecureTokens.php $
 
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       * @lastmodified $Date: 2017-07-02 17:14:29 +0200 (Sun, 02 Jul 2017) $
 
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       * @since         File available since 12.09.2015
 
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       * @description
 
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       * This class is a replacement for the former class SecureForm using the SecureTokensInterface
 
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       *
 
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       * Settings for this class
 
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       * TYPE    KONSTANTE                    REGISTY-VAR                       DEFAULTWERT
 
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       * boolean SEC_TOKEN_FINGERPRINT        ($oReg->SecTokenFingerprint)      [default=true]
 
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       * integer SEC_TOKEN_IPV4_NETMASK       ($oReg->SecTokenIpv4Netmask)      0-255 [default=24]
 
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       * integer SEC_TOKEN_IPV6_PREFIX_LENGTH ($oReg->SecTokenIpv6PrefixLength) 0-128 [default=64]
 
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       * integer SEC_TOKEN_LIFE_TIME          ($oReg->SecTokenLifeTime)         1800 | 2700 | 3600[default] | 7200
 
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      */
 
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      class SecureTokens
 
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      {
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      /**
 
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       * possible settings for TokenLifeTime in seconds
 
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       * @description seconds for 30min / 45min / 1h / 75min / 90min / 105min / 2h
 
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       */
 
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      /** minimum lifetime in seconds */
 
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          const LIFETIME_MIN  = 1800; // 30min
 
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      /** maximum lifetime in seconds */
 
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          const LIFETIME_MAX  = 7200; // 120min (2h)
 
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      /** stepwidth between min and max */
 
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          const LIFETIME_STEP =  900; // 15min
 
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      /** lifetime in seconds to use in DEBUG mode if negative value is given (-1) */
 
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          const DEBUG_LIFETIME = 300; // 5
 
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      /** array to hold all tokens from the session */
 
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          private $aTokens = array(
 
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              'default' => array('value' => 0, 'expire' => 0, 'instance' => 0)
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          );
 
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      /** the salt for this instance */
 
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          private $sSalt             = '';
 
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      /** fingerprint of the current connection */
 
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          private $sFingerprint      = '';
 
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      /** the FTAN token which is valid for this instance */
 
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          private $aLastCreatedFtan  = null;
 
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      /** the time when tokens expired if they created in this instance */
 
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          private $iExpireTime       = 0;
 
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      /** remove selected tokens only and update all others */
 
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          private $bPreserveAllOtherTokens = false;
 
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      /** id of the current instance */
 
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          private $sCurrentInstance  = null;
 
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      /** id of the instance to remove */
 
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          private $sInstanceToDelete = null;
 
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      /** id of the instance to update expire time */
 
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          private $sInstanceToUpdate = null;
 
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      /* --- settings for SecureTokens ------------------------------------------------------ */
 
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      /** use fingerprinting to encode */
 
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          private $bUseFingerprint   = true;
 
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      /** maximum lifetime of a token in seconds */
 
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          private $iTokenLifeTime    = 1800; // between LIFETIME_MIN and LIFETIME_MAX (default = 30min)
 
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      /** bit length of the IPv4 Netmask (0-32 // 0 = off  default = 24) */
 
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          private $iNetmaskLengthV4  = 0;
 
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      /** bit length of the IPv6 Netmask (0-128 // 0 = off  default = 64) */
 
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          private $iNetmaskLengthV6  = 0;
 
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          private static $oInstance = null;
 
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      /**
 
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       * constructor
 
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       * @param (void)
 
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       */
 
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          protected function __construct()
 
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          {
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          // load settings if available
 
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              $this->getSettings();
 
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          // generate salt for calculations in this instance
 
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              $this->sSalt            = $this->generateSalt();
 
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          // generate fingerprint for the current connection
 
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              $this->sFingerprint     = $this->buildFingerprint();
 
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          // define the expiretime for this instance
 
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              $this->iExpireTime      = time() + $this->iTokenLifeTime;
 
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          // calculate the instance id for this instance
 
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              $this->sCurrentInstance = $this->encodeHash(md5($this->iExpireTime.$this->sSalt));
 
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          // load array of tokens from session
 
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              $this->loadTokens();
 
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          // at first of all remove expired tokens
 
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              $this->removeExpiredTokens();
 
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          }
 
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          public static function getInstance()
 
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          {
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              if (self::$oInstance == null) {
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                  $sClass = __CLASS__;
 
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                  self::$oInstance = new $sClass();
 
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              }
 
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              return self::$oInstance;
 
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          }
 
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          private function __clone() {}
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      /**
 
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       * destructor
 
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       */
 
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          final public function __destruct()
 
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          {
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              foreach ($this->aTokens as $sKey => $aToken) {
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                  if ($aToken['instance'] == $this->sInstanceToUpdate) {
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                      $this->aTokens[$sKey]['instance'] = $this->sCurrentInstance;
 
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                      $this->aTokens[$sKey]['expire']   = $this->iExpireTime;
 
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                  } elseif ($aToken['instance'] == $this->sInstanceToDelete) {
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                      unset($this->aTokens[$sKey]);
 
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                  }
 
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              }
 
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              $this->saveTokens();
 
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          }
 
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      /**
 
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       * returns the current FTAN
 
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       * @param bool $mode: true or POST returns a complete prepared, hidden HTML-Input-Tag (default)
 
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       *                     false or GET returns an GET argument 'key=value'
 
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       * @return mixed:     array or string
 
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       * @deprecated the param $mMode is set deprecated
 
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       *              string retvals are set deprecated. From versions after 2.8.4 retval will be array only
 
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       */
 
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          final public function getFTAN($mMode = 'POST')
 
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          {
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              if (is_null($this->aLastCreatedFtan)) {
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                  $sFtan = md5($this->sSalt);
 
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                  $this->aLastCreatedFtan = $this->addToken(
 
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                      substr($sFtan, rand(0,15), 16),
 
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                      substr($sFtan, rand(0,15), 16)
 
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                  );
 
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              }
 
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              $aFtan = $this->aTokens[$this->aLastCreatedFtan];
 
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              $aFtan['name']  = $this->aLastCreatedFtan;
 
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              $aFtan['value'] = $this->encodeHash(md5($aFtan['value'].$this->sFingerprint));
 
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              if (is_string($mMode)) {
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                  $mMode = strtoupper($mMode);
 
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              } else {
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                  $mMode = $mMode === true ? 'POST' : 'GET';
 
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              }
 
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              switch ($mMode):
 
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                  case 'POST':
 
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                      return '<input type="hidden" name="'.$aFtan['name'].'" value="'
 
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                            .$aFtan['value'].'" title="">';
 
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                      break;
 
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                  case 'GET':
 
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                      return $aFtan['name'].'='.$aFtan['value'];
 
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                      break;
 
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                  default:
 
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                      return array('name' => $aFtan['name'], 'value' => $aFtan['value']);
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              endswitch;
 
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          }
 
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      /**
 
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       * checks received form-transactionnumbers against session-stored one
 
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       * @param string $mode: requestmethode POST(default) or GET
 
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       * @param bool $bPreserve (default=false)
 
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       * @return bool:    true if numbers matches against stored ones
 
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       *
 
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       * requirements: an active session must be available
 
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       * this check will prevent from multiple sending a form. history.back() also will never work
 
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       */
 
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          final public function checkFTAN($mMode = 'POST')
 
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          {
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              $bRetval = false;
 
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              // get the POST/GET arguments
 
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              $aArguments = (strtoupper($mMode) == 'POST' ? $_POST : $_GET);
 
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              // encode the value of all matching tokens
 
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              $aMatchingTokens = array_map(
 
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                  array($this, 'checkFtanCallback'),
 
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          //            function ($aToken) {
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          //                return $this->encode64(md5($aToken['value'].$this->sFingerprint));
 
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          //            },
 
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                      // extract all matching tokens from $this->aTokens
 
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                      array_intersect_key($this->aTokens, $aArguments)
 
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              );
 
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      //echo "<pre>".print_r(debug_backtrace(0),true)."</pre>";
 
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              // extract all matching arguments from $aArguments
 
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              $aMatchingArguments = array_intersect_key($aArguments, $this->aTokens);
 
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              // get all tokens with matching values from match lists
 
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              $aHits = array_intersect($aMatchingTokens, $aMatchingArguments);
 
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              foreach ($aHits as $sTokenName => $sValue) {
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                  $bRetval = true;
 
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                  $this->removeToken($sTokenName);
 
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              }
 
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              return $bRetval;
 
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          }
 
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      /**
 
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       * store value in session and returns an accesskey to it
 
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       * @param mixed $mValue can be numeric, string or array
 
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       * @return string
 
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       */
 
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          final public function getIDKEY($mValue)
 
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          {
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              if (is_array($mValue) == true) {
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                  // serialize value, if it's an array
 
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                  $mValue = serialize($mValue);
 
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              }
 
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              // crypt value with salt into md5-hash and return a 16-digit block from random start position
 
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              $sTokenName = $this->addToken(
 
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                  substr(md5($this->sSalt.(string)$mValue), rand(0,15), 16),
 
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                  $mValue
 
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              );
 
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              return $sTokenName;
 
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          }
 
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      /*
 
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       * search for key in session and returns the original value
 
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       * @param string $sFieldname: name of the POST/GET-Field containing the key or hex-key itself
 
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       * @param mixed $mDefault: returnvalue if key not exist (default 0)
 
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     | 
    
       * @param string $sRequest: requestmethode can be POST or GET or '' (default POST)
 
     | 
  
  
    | 
      236
     | 
    
       * @param bool $bPreserve (default=false)
 
     | 
  
  
    | 
      237
     | 
    
       * @return mixed: the original value (string, numeric, array) or DEFAULT if request fails
 
     | 
  
  
    | 
      238
     | 
    
       * @description: each IDKEY can be checked only once. Unused Keys stay in list until they expire
 
     | 
  
  
    | 
      239
     | 
    
       */
 
     | 
  
  
    | 
      240
     | 
    
          final public function checkIDKEY($sFieldname, $mDefault = 0, $sRequest = 'POST', $bPreserve = false)
 
     | 
  
  
    | 
      241
     | 
    
          {
     | 
  
  
    | 
      242
     | 
    
              $mReturnValue = $mDefault; // set returnvalue to default
 
     | 
  
  
    | 
      243
     | 
    
              $this->bPreserveAllOtherTokens = $bPreserve ?: $this->bPreserveAllOtherTokens;
 
     | 
  
  
    | 
      244
     | 
    
              $sRequest = strtoupper($sRequest);
 
     | 
  
  
    | 
      245
     | 
    
              switch ($sRequest) {
     | 
  
  
    | 
      246
     | 
    
                  case 'POST':
 
     | 
  
  
    | 
      247
     | 
    
                      $sTokenName = $_POST[$sFieldname] ?: $sFieldname;
 
     | 
  
  
    | 
      248
     | 
    
                      break;
 
     | 
  
  
    | 
      249
     | 
    
                  case 'GET':
 
     | 
  
  
    | 
      250
     | 
    
                      $sTokenName = $_GET[$sFieldname] ?: $sFieldname;
 
     | 
  
  
    | 
      251
     | 
    
                      break;
 
     | 
  
  
    | 
      252
     | 
    
                  default:
 
     | 
  
  
    | 
      253
     | 
    
                      $sTokenName = $sFieldname;
 
     | 
  
  
    | 
      254
     | 
    
              }
 
     | 
  
  
    | 
      255
     | 
    
              if (preg_match('/^[0-9a-f]{16}$/i', $sTokenName)) {
     | 
  
  
    | 
      256
     | 
    
              // key must be a 16-digit hexvalue
 
     | 
  
  
    | 
      257
     | 
    
                  if (array_key_exists($sTokenName, $this->aTokens)) {
     | 
  
  
    | 
      258
     | 
    
                  // check if key is stored in IDKEYs-list
 
     | 
  
  
    | 
      259
     | 
    
                      $mReturnValue = $this->aTokens[$sTokenName]['value']; // get stored value
 
     | 
  
  
    | 
      260
     | 
    
                      $this->removeToken($sTokenName);   // remove from list to prevent multiuse
 
     | 
  
  
    | 
      261
     | 
    
                      if (preg_match('/.*(?<!\{).*(\d:\{.*;\}).*(?!\}).*/', $mReturnValue)) {
     | 
  
  
    | 
      262
     | 
    
                      // if value is a serialized array, then deserialize it
 
     | 
  
  
    | 
      263
     | 
    
                          $mReturnValue = unserialize($mReturnValue);
 
     | 
  
  
    | 
      264
     | 
    
                      }
 
     | 
  
  
    | 
      265
     | 
    
                  }
 
     | 
  
  
    | 
      266
     | 
    
              }
 
     | 
  
  
    | 
      267
     | 
    
              return $mReturnValue;
 
     | 
  
  
    | 
      268
     | 
    
          }
 
     | 
  
  
    | 
      269
     | 
    
      
 
     | 
  
  
    | 
      270
     | 
    
      /**
 
     | 
  
  
    | 
      271
     | 
    
       * make a valid LifeTime value from given integer on the rules of class SecureTokens
 
     | 
  
  
    | 
      272
     | 
    
       * @param integer  $iLifeTime
 
     | 
  
  
    | 
      273
     | 
    
       * @return integer
 
     | 
  
  
    | 
      274
     | 
    
       */
 
     | 
  
  
    | 
      275
     | 
    
          final public function sanitizeLifeTime($iLifeTime)
 
     | 
  
  
    | 
      276
     | 
    
          {
     | 
  
  
    | 
      277
     | 
    
              $iLifeTime = intval($iLifeTime);
 
     | 
  
  
    | 
      278
     | 
    
              for ($i = self::LIFETIME_MIN; $i <= self::LIFETIME_MAX; $i += self::LIFETIME_STEP) {
     | 
  
  
    | 
      279
     | 
    
                  $aLifeTimes[] = $i;
 
     | 
  
  
    | 
      280
     | 
    
              }
 
     | 
  
  
    | 
      281
     | 
    
              $iRetval = array_pop($aLifeTimes);
 
     | 
  
  
    | 
      282
     | 
    
              foreach ($aLifeTimes as $iValue) {
     | 
  
  
    | 
      283
     | 
    
                  if ($iLifeTime <= $iValue) {
     | 
  
  
    | 
      284
     | 
    
                      $iRetval = $iValue;
 
     | 
  
  
    | 
      285
     | 
    
                      break;
 
     | 
  
  
    | 
      286
     | 
    
                  }
 
     | 
  
  
    | 
      287
     | 
    
              }
 
     | 
  
  
    | 
      288
     | 
    
              return $iRetval;
 
     | 
  
  
    | 
      289
     | 
    
          }
 
     | 
  
  
    | 
      290
     | 
    
      
 
     | 
  
  
    | 
      291
     | 
    
      /**
 
     | 
  
  
    | 
      292
     | 
    
       * returns all TokenLifeTime values
 
     | 
  
  
    | 
      293
     | 
    
       * @return array
 
     | 
  
  
    | 
      294
     | 
    
       */
 
     | 
  
  
    | 
      295
     | 
    
          final public function getTokenLifeTime()
 
     | 
  
  
    | 
      296
     | 
    
          {
     | 
  
  
    | 
      297
     | 
    
              return array(
 
     | 
  
  
    | 
      298
     | 
    
                  'min'   => self::LIFETIME_MIN,
 
     | 
  
  
    | 
      299
     | 
    
                  'max'   => self::LIFETIME_MAX,
 
     | 
  
  
    | 
      300
     | 
    
                  'step'  => self::LIFETIME_STEP,
 
     | 
  
  
    | 
      301
     | 
    
                  'value' => $this->iTokenLifeTime
 
     | 
  
  
    | 
      302
     | 
    
              );
 
     | 
  
  
    | 
      303
     | 
    
          }
 
     | 
  
  
    | 
      304
     | 
    
      
 
     | 
  
  
    | 
      305
     | 
    
      /* ************************************************************************************ */
 
     | 
  
  
    | 
      306
     | 
    
      /* *** from here private methods only                                               *** */
 
     | 
  
  
    | 
      307
     | 
    
      /* ************************************************************************************ */
 
     | 
  
  
    | 
      308
     | 
    
      /**
 
     | 
  
  
    | 
      309
     | 
    
       * load all tokens from session
 
     | 
  
  
    | 
      310
     | 
    
       */
 
     | 
  
  
    | 
      311
     | 
    
          private function loadTokens()
 
     | 
  
  
    | 
      312
     | 
    
          {
     | 
  
  
    | 
      313
     | 
    
              if (isset($_SESSION['TOKENS'])) {
     | 
  
  
    | 
      314
     | 
    
                  $this->aTokens = unserialize($_SESSION['TOKENS']);
 
     | 
  
  
    | 
      315
     | 
    
              } else {
     | 
  
  
    | 
      316
     | 
    
                  $this->saveTokens();
 
     | 
  
  
    | 
      317
     | 
    
              }
 
     | 
  
  
    | 
      318
     | 
    
          }
 
     | 
  
  
    | 
      319
     | 
    
      
 
     | 
  
  
    | 
      320
     | 
    
      /**
 
     | 
  
  
    | 
      321
     | 
    
       * save all tokens into session
 
     | 
  
  
    | 
      322
     | 
    
       */
 
     | 
  
  
    | 
      323
     | 
    
          private function saveTokens()
 
     | 
  
  
    | 
      324
     | 
    
          {
     | 
  
  
    | 
      325
     | 
    
              $_SESSION['TOKENS'] = serialize($this->aTokens);
 
     | 
  
  
    | 
      326
     | 
    
          }
 
     | 
  
  
    | 
      327
     | 
    
      
 
     | 
  
  
    | 
      328
     | 
    
      /**
 
     | 
  
  
    | 
      329
     | 
    
       * add new token to the list
 
     | 
  
  
    | 
      330
     | 
    
       * @param string $sTokenName
 
     | 
  
  
    | 
      331
     | 
    
       * @param string $sValue
 
     | 
  
  
    | 
      332
     | 
    
       * @return string  name(index) of the token
 
     | 
  
  
    | 
      333
     | 
    
       */
 
     | 
  
  
    | 
      334
     | 
    
          private function addToken($sTokenName, $sValue)
 
     | 
  
  
    | 
      335
     | 
    
          {
     | 
  
  
    | 
      336
     | 
    
              // limit TokenName to 16 digits
 
     | 
  
  
    | 
      337
     | 
    
              $sTokenName = substr(str_pad($sTokenName, 16, '0', STR_PAD_LEFT), -16);
 
     | 
  
  
    | 
      338
     | 
    
              // make sure, first digit is a alpha char [a-f]
 
     | 
  
  
    | 
      339
     | 
    
              $sTokenName[0] = dechex(10 + (hexdec($sTokenName[0]) % 5));
 
     | 
  
  
    | 
      340
     | 
    
              // loop as long the generated TokenName already exists in list
 
     | 
  
  
    | 
      341
     | 
    
              while (isset($this->aTokens[$sTokenName])) {
     | 
  
  
    | 
      342
     | 
    
                  // split TokenName into 4 words
 
     | 
  
  
    | 
      343
     | 
    
                  $aWords = str_split($sTokenName, 4);
 
     | 
  
  
    | 
      344
     | 
    
                  // get lowest word and increment it
 
     | 
  
  
    | 
      345
     | 
    
                  $iWord = hexdec($aWords[3]) + 1;
 
     | 
  
  
    | 
      346
     | 
    
                  // reformat integer into a 4 digit hex string
 
     | 
  
  
    | 
      347
     | 
    
                  $aWords[3] = sprintf('%04x', ($iWord > 0xffff ? 1 : $iWord));
     | 
  
  
    | 
      348
     | 
    
                  // rebuild the TokenName
 
     | 
  
  
    | 
      349
     | 
    
                  $sTokenName = implode('', $aWords);
     | 
  
  
    | 
      350
     | 
    
              }
 
     | 
  
  
    | 
      351
     | 
    
              // store Token in list
 
     | 
  
  
    | 
      352
     | 
    
              $this->aTokens[$sTokenName] = array(
 
     | 
  
  
    | 
      353
     | 
    
                  'value'    => $sValue,
 
     | 
  
  
    | 
      354
     | 
    
                  'expire'   => $this->iExpireTime,
 
     | 
  
  
    | 
      355
     | 
    
                  'instance' => $this->sCurrentInstance
 
     | 
  
  
    | 
      356
     | 
    
              );
 
     | 
  
  
    | 
      357
     | 
    
              return $sTokenName;
 
     | 
  
  
    | 
      358
     | 
    
          }
 
     | 
  
  
    | 
      359
     | 
    
      
 
     | 
  
  
    | 
      360
     | 
    
      /**
 
     | 
  
  
    | 
      361
     | 
    
       * remove the token, called sTokenName from list
 
     | 
  
  
    | 
      362
     | 
    
       * @param type $sTokenName
 
     | 
  
  
    | 
      363
     | 
    
       */
 
     | 
  
  
    | 
      364
     | 
    
          private function removeToken($sTokenName)
 
     | 
  
  
    | 
      365
     | 
    
          {
     | 
  
  
    | 
      366
     | 
    
              if (isset($this->aTokens[$sTokenName])) {
     | 
  
  
    | 
      367
     | 
    
                  if ($this->bPreserveAllOtherTokens) {
     | 
  
  
    | 
      368
     | 
    
                      if ($this->sInstanceToDelete) {
     | 
  
  
    | 
      369
     | 
    
                          $this->sInstanceToUpdate = $this->sInstanceToDelete;
 
     | 
  
  
    | 
      370
     | 
    
                          $this->sInstanceToDelete = null;
 
     | 
  
  
    | 
      371
     | 
    
                      } else {
     | 
  
  
    | 
      372
     | 
    
                          $this->sInstanceToUpdate = $this->aTokens[$sTokenName]['instance'];
 
     | 
  
  
    | 
      373
     | 
    
                      }
 
     | 
  
  
    | 
      374
     | 
    
                  } else {
     | 
  
  
    | 
      375
     | 
    
                      $this->sInstanceToDelete = $this->aTokens[$sTokenName]['instance'];
 
     | 
  
  
    | 
      376
     | 
    
                  }
 
     | 
  
  
    | 
      377
     | 
    
                  unset($this->aTokens[$sTokenName]);
 
     | 
  
  
    | 
      378
     | 
    
              }
 
     | 
  
  
    | 
      379
     | 
    
          }
 
     | 
  
  
    | 
      380
     | 
    
      
 
     | 
  
  
    | 
      381
     | 
    
      /**
 
     | 
  
  
    | 
      382
     | 
    
       * remove all expired tokens from list
 
     | 
  
  
    | 
      383
     | 
    
       */
 
     | 
  
  
    | 
      384
     | 
    
          private function removeExpiredTokens()
 
     | 
  
  
    | 
      385
     | 
    
          {
     | 
  
  
    | 
      386
     | 
    
              $iTimestamp = time();
 
     | 
  
  
    | 
      387
     | 
    
              foreach ($this->aTokens as $sTokenName => $aToken) {
     | 
  
  
    | 
      388
     | 
    
                  if ($aToken['expire'] <= $iTimestamp && $aToken['expire'] != 0){
     | 
  
  
    | 
      389
     | 
    
                      unset($this->aTokens[$sTokenName]);
 
     | 
  
  
    | 
      390
     | 
    
                  }
 
     | 
  
  
    | 
      391
     | 
    
              }
 
     | 
  
  
    | 
      392
     | 
    
          }
 
     | 
  
  
    | 
      393
     | 
    
      
 
     | 
  
  
    | 
      394
     | 
    
      /**
 
     | 
  
  
    | 
      395
     | 
    
       * generate a runtime depended hash
 
     | 
  
  
    | 
      396
     | 
    
       * @return string  md5 hash
 
     | 
  
  
    | 
      397
     | 
    
       */
 
     | 
  
  
    | 
      398
     | 
    
          private function generateSalt()
 
     | 
  
  
    | 
      399
     | 
    
          {
     | 
  
  
    | 
      400
     | 
    
              list($fUsec, $fSec) = explode(" ", microtime());
     | 
  
  
    | 
      401
     | 
    
              $sSalt = (string)rand(10000, 99999)
 
     | 
  
  
    | 
      402
     | 
    
                     . (string)((float)$fUsec + (float)$fSec)
 
     | 
  
  
    | 
      403
     | 
    
                     . (string)rand(10000, 99999);
 
     | 
  
  
    | 
      404
     | 
    
              return md5($sSalt);
 
     | 
  
  
    | 
      405
     | 
    
          }
 
     | 
  
  
    | 
      406
     | 
    
      
 
     | 
  
  
    | 
      407
     | 
    
      /**
 
     | 
  
  
    | 
      408
     | 
    
       * build a simple fingerprint
 
     | 
  
  
    | 
      409
     | 
    
       * @return string
 
     | 
  
  
    | 
      410
     | 
    
       */
 
     | 
  
  
    | 
      411
     | 
    
          private function buildFingerprint()
 
     | 
  
  
    | 
      412
     | 
    
          {
     | 
  
  
    | 
      413
     | 
    
              if (!$this->bUseFingerprint) { return md5('this_is_a_dummy_only'); }
     | 
  
  
    | 
      414
     | 
    
              $sClientIp = '127.0.0.1';
 
     | 
  
  
    | 
      415
     | 
    
              if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)){
     | 
  
  
    | 
      416
     | 
    
                  $aTmp = preg_split('/\s*,\s*/', $_SERVER['HTTP_X_FORWARDED_FOR'], null, PREG_SPLIT_NO_EMPTY);
     | 
  
  
    | 
      417
     | 
    
                  $sClientIp = array_pop($aTmp);
 
     | 
  
  
    | 
      418
     | 
    
              }else if (array_key_exists('REMOTE_ADDR', $_SERVER)) {
     | 
  
  
    | 
      419
     | 
    
                  $sClientIp = $_SERVER['REMOTE_ADDR'];
 
     | 
  
  
    | 
      420
     | 
    
              }else if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
     | 
  
  
    | 
      421
     | 
    
                  $sClientIp = $_SERVER['HTTP_CLIENT_IP'];
 
     | 
  
  
    | 
      422
     | 
    
              }
 
     | 
  
  
    | 
      423
     | 
    
              $aTmp = array_chunk(stat(__FILE__), 11);
 
     | 
  
  
    | 
      424
     | 
    
              unset($aTmp[0][8]);
 
     | 
  
  
    | 
      425
     | 
    
              return md5(
 
     | 
  
  
    | 
      426
     | 
    
                  __FILE__ . PHP_VERSION . implode('', $aTmp[0])
     | 
  
  
    | 
      427
     | 
    
                  . (array_key_exists('HTTP_USER_AGENT', $_SERVER) ? $_SERVER['HTTP_USER_AGENT'] : 'AGENT')
     | 
  
  
    | 
      428
     | 
    
                  . $this->calcClientIpHash($sClientIp)
 
     | 
  
  
    | 
      429
     | 
    
              );
 
     | 
  
  
    | 
      430
     | 
    
          }
 
     | 
  
  
    | 
      431
     | 
    
      
 
     | 
  
  
    | 
      432
     | 
    
      /**
 
     | 
  
  
    | 
      433
     | 
    
       * mask IPv4 as well IPv6 addresses with netmask and make a md5 hash from
 
     | 
  
  
    | 
      434
     | 
    
       * @param string $sClientIp IP as string from $_SERVER['REMOTE_ADDR']
 
     | 
  
  
    | 
      435
     | 
    
       * @return md5 value of masked ip
 
     | 
  
  
    | 
      436
     | 
    
       * @description this method does not accept the IPv6/IPv4 mixed format
 
     | 
  
  
    | 
      437
     | 
    
       *               like "2222:3333:4444:5555:6666:7777:192.168.1.200"
 
     | 
  
  
    | 
      438
     | 
    
       */
 
     | 
  
  
    | 
      439
     | 
    
          private function calcClientIpHash($sRawIp)
 
     | 
  
  
    | 
      440
     | 
    
          {
     | 
  
  
    | 
      441
     | 
    
              // clean address from netmask/prefix and port
 
     | 
  
  
    | 
      442
     | 
    
              $sPattern = '/^\[?([.:a-f0-9]*)(?:\/[0-1]*)?(?:\]?.*)$/im';
 
     | 
  
  
    | 
      443
     | 
    
              $sRawIp = preg_replace($sPattern, '$1', $sRawIp);
 
     | 
  
  
    | 
      444
     | 
    
              if (strpos($sRawIp, ':') === false) {
     | 
  
  
    | 
      445
     | 
    
      // sanitize IPv4 ---------------------------------------------------------------------- //
 
     | 
  
  
    | 
      446
     | 
    
                  $iIpV4 = ip2long($sRawIp);
 
     | 
  
  
    | 
      447
     | 
    
                  // calculate netmask
 
     | 
  
  
    | 
      448
     | 
    
                  $iMask = ($this->iNetmaskLengthV4 < 1)
 
     | 
  
  
    | 
      449
     | 
    
                      ? 0
 
     | 
  
  
    | 
      450
     | 
    
                      : bindec(
 
     | 
  
  
    | 
      451
     | 
    
                          str_repeat('1', $this->iNetmaskLengthV4).
     | 
  
  
    | 
      452
     | 
    
                          str_repeat('0', 32 - $this->iNetmaskLengthV4)
     | 
  
  
    | 
      453
     | 
    
                      );
 
     | 
  
  
    | 
      454
     | 
    
                  // apply mask and reformat to IPv4 string notation.
 
     | 
  
  
    | 
      455
     | 
    
                  $sIp = long2ip($iIpV4 & $iMask);
 
     | 
  
  
    | 
      456
     | 
    
              } else {
     | 
  
  
    | 
      457
     | 
    
      // sanitize IPv6 ---------------------------------------------------------------------- //
 
     | 
  
  
    | 
      458
     | 
    
                  // check if IP includes a IPv4 part and convert this into IPv6 format
 
     | 
  
  
    | 
      459
     | 
    
                  $sPattern = '/^([:a-f0-9]*?)\:([0-9]{1,3}(?:\.[0-9]{1,3}){3})$/is';
     | 
  
  
    | 
      460
     | 
    
                  if (preg_match($sPattern, $sRawIp, $aMatches)) {
     | 
  
  
    | 
      461
     | 
    
                      // convert IPv4 into full size 32bit binary string
 
     | 
  
  
    | 
      462
     | 
    
                      $sIpV4Bin = str_pad((string)decbin(ip2long($aMatches[2])), 32, '0', STR_PAD_LEFT) ;
 
     | 
  
  
    | 
      463
     | 
    
                      // split into 2 parts of 16bit
 
     | 
  
  
    | 
      464
     | 
    
                      $aIpV6Hex = str_split($sIpV4Bin, 16);
 
     | 
  
  
    | 
      465
     | 
    
                      // concate the IPv6/96 part and hex of both IPv4 parts
 
     | 
  
  
    | 
      466
     | 
    
                      $sRawIp = $aMatches[1].':'.dechex(bindec($aIpV6Hex[0])).':'.dechex(bindec($aIpV6Hex[1]));
 
     | 
  
  
    | 
      467
     | 
    
                  }
 
     | 
  
  
    | 
      468
     | 
    
                  // calculate number of missing IPv6 words
 
     | 
  
  
    | 
      469
     | 
    
                  $iWords = 8 - count(preg_split('/:/', $sRawIp, null, PREG_SPLIT_NO_EMPTY));
     | 
  
  
    | 
      470
     | 
    
                  // build multiple ':0000:' replacements for '::'
 
     | 
  
  
    | 
      471
     | 
    
                  $sReplacement = $iWords ? implode(':', array_fill(0, $iWords, '0000')) : '';
     | 
  
  
    | 
      472
     | 
    
                  // insert replacements and remove trailing/leading ':'
 
     | 
  
  
    | 
      473
     | 
    
                  $sClientIp = trim(preg_replace('/\:\:/', ':'.$sReplacement.':', $sRawIp), ':');
     | 
  
  
    | 
      474
     | 
    
                  // split all 8 parts from IP into an array
 
     | 
  
  
    | 
      475
     | 
    
                  $aIpV6 = array_map(
 
     | 
  
  
    | 
      476
     | 
    
                      function($sPart) {
     | 
  
  
    | 
      477
     | 
    
                          // expand all parts to 4 hex digits using leading '0'
 
     | 
  
  
    | 
      478
     | 
    
                          return str_pad($sPart, 4, '0', STR_PAD_LEFT);
 
     | 
  
  
    | 
      479
     | 
    
                      },
 
     | 
  
  
    | 
      480
     | 
    
                      preg_split('/:/', $sClientIp)
     | 
  
  
    | 
      481
     | 
    
                  );
 
     | 
  
  
    | 
      482
     | 
    
                  // build binary netmask from iNetmaskLengthV6
 
     | 
  
  
    | 
      483
     | 
    
                  // and split all 8 parts into an array
 
     | 
  
  
    | 
      484
     | 
    
                  if ($this->iNetmaskLengthV6 < 1) {
     | 
  
  
    | 
      485
     | 
    
                      $aMask = array_fill(0, 8, str_repeat('0', 16));
     | 
  
  
    | 
      486
     | 
    
                  } else {
     | 
  
  
    | 
      487
     | 
    
                      $aMask = str_split(
 
     | 
  
  
    | 
      488
     | 
    
                          str_repeat('1', $this->iNetmaskLengthV6).
     | 
  
  
    | 
      489
     | 
    
                          str_repeat('0', 128 - $this->iNetmaskLengthV6),
     | 
  
  
    | 
      490
     | 
    
                          16
 
     | 
  
  
    | 
      491
     | 
    
                      );
 
     | 
  
  
    | 
      492
     | 
    
                  }
 
     | 
  
  
    | 
      493
     | 
    
                  // iterate all IP parts, apply its mask and reformat to IPv6 string notation.
 
     | 
  
  
    | 
      494
     | 
    
                  array_walk(
 
     | 
  
  
    | 
      495
     | 
    
                      $aIpV6,
 
     | 
  
  
    | 
      496
     | 
    
                      function(&$sWord, $iIndex) use ($aMask) {
     | 
  
  
    | 
      497
     | 
    
                          $sWord = sprintf('%04x', hexdec($sWord) & bindec($aMask[$iIndex]));
     | 
  
  
    | 
      498
     | 
    
                      }
 
     | 
  
  
    | 
      499
     | 
    
                  );
 
     | 
  
  
    | 
      500
     | 
    
                  // reformat to IPv6 string notation.
 
     | 
  
  
    | 
      501
     | 
    
                  $sIp = implode(':', $aIpV6);
     | 
  
  
    | 
      502
     | 
    
      // ------------------------------------------------------------------------------------ //
 
     | 
  
  
    | 
      503
     | 
    
              }
 
     | 
  
  
    | 
      504
     | 
    
              return md5($sIp); // return the hashed IP string
 
     | 
  
  
    | 
      505
     | 
    
          }
 
     | 
  
  
    | 
      506
     | 
    
      
 
     | 
  
  
    | 
      507
     | 
    
      /**
 
     | 
  
  
    | 
      508
     | 
    
       * encode a hex string into a 64char based string
 
     | 
  
  
    | 
      509
     | 
    
       * @param string $sMd5Hash
 
     | 
  
  
    | 
      510
     | 
    
       * @return string
 
     | 
  
  
    | 
      511
     | 
    
       * @description reduce the 32char length of a MD5 to 22 chars
 
     | 
  
  
    | 
      512
     | 
    
       */
 
     | 
  
  
    | 
      513
     | 
    
          private function encodeHash($sMd5Hash)
 
     | 
  
  
    | 
      514
     | 
    
          {
     | 
  
  
    | 
      515
     | 
    
               return preg_replace('/[^a-zA-Z0-9]/', '_', rtrim(base64_encode(pack('h*',$sMd5Hash)), '='));
     | 
  
  
    | 
      516
     | 
    
      //        return rtrim(base64_encode(pack('h*',$sMd5Hash)), '+-= ');
     | 
  
  
    | 
      517
     | 
    
          }
 
     | 
  
  
    | 
      518
     | 
    
      
 
     | 
  
  
    | 
      519
     | 
    
      // callback method, needed for PHP-5.3.x only
 
     | 
  
  
    | 
      520
     | 
    
          private function checkFtanCallback($aToken)
 
     | 
  
  
    | 
      521
     | 
    
          {
     | 
  
  
    | 
      522
     | 
    
              return $this->encodeHash(md5($aToken['value'].$this->sFingerprint));
 
     | 
  
  
    | 
      523
     | 
    
          }
 
     | 
  
  
    | 
      524
     | 
    
      
 
     | 
  
  
    | 
      525
     | 
    
      /**
 
     | 
  
  
    | 
      526
     | 
    
       * read settings if available
 
     | 
  
  
    | 
      527
     | 
    
       */
 
     | 
  
  
    | 
      528
     | 
    
          private function getSettings()
 
     | 
  
  
    | 
      529
     | 
    
          {
     | 
  
  
    | 
      530
     | 
    
              if (!class_exists('WbAdaptor', false)) {
     | 
  
  
    | 
      531
     | 
    
              // for WB before 2.8.4
 
     | 
  
  
    | 
      532
     | 
    
                  $this->bUseFingerprint  = defined('SEC_TOKEN_FINGERPRINT')
     | 
  
  
    | 
      533
     | 
    
                                            ? SEC_TOKEN_FINGERPRINT
 
     | 
  
  
    | 
      534
     | 
    
                                            : $this->bUseFingerprint;
 
     | 
  
  
    | 
      535
     | 
    
                  $this->iNetmaskLengthV4 = defined('SEC_TOKEN_NETMASK4')
     | 
  
  
    | 
      536
     | 
    
                                            ? SEC_TOKEN_NETMASK4
 
     | 
  
  
    | 
      537
     | 
    
                                            : $this->iNetmaskLengthV4;
 
     | 
  
  
    | 
      538
     | 
    
                  $this->iNetmaskLengthV6 = defined('SEC_TOKEN_NETMASK6')
     | 
  
  
    | 
      539
     | 
    
                                            ? SEC_TOKEN_NETMASK6
 
     | 
  
  
    | 
      540
     | 
    
                                            : $this->iNetmaskLengthV6;
 
     | 
  
  
    | 
      541
     | 
    
                  $this->iTokenLifeTime   = defined('SEC_TOKEN_LIFE_TIME')
     | 
  
  
    | 
      542
     | 
    
                                            ? SEC_TOKEN_LIFE_TIME
 
     | 
  
  
    | 
      543
     | 
    
                                            : $this->iTokenLifeTime;
 
     | 
  
  
    | 
      544
     | 
    
              } else {
     | 
  
  
    | 
      545
     | 
    
              // for WB from 2.8.4 and up
 
     | 
  
  
    | 
      546
     | 
    
                  $oReg = WbAdaptor::getInstance();
 
     | 
  
  
    | 
      547
     | 
    
                  $this->bUseFingerprint  = isset($oReg->SecTokenFingerprint)
 
     | 
  
  
    | 
      548
     | 
    
                                            ? $oReg->SecTokenFingerprint
 
     | 
  
  
    | 
      549
     | 
    
                                            : $this->bUseFingerprint;
 
     | 
  
  
    | 
      550
     | 
    
                  $this->iNetmaskLengthV4 = isset($oReg->SecTokenIpv4Netmask)
 
     | 
  
  
    | 
      551
     | 
    
                                            ? $oReg->SecTokenIpv4Netmask
 
     | 
  
  
    | 
      552
     | 
    
                                            : $this->iNetmaskLengthV4;
 
     | 
  
  
    | 
      553
     | 
    
                  $this->iNetmaskLengthV6 = isset($oReg->SecTokenIpv6PrefixLength)
 
     | 
  
  
    | 
      554
     | 
    
                                            ? $oReg->SecTokenIpv6PrefixLength
 
     | 
  
  
    | 
      555
     | 
    
                                            : $this->iNetmaskLengthV6;
 
     | 
  
  
    | 
      556
     | 
    
                  $this->iTokenLifeTime   = isset($oReg->SecTokenLifeTime)
 
     | 
  
  
    | 
      557
     | 
    
                                            ? $oReg->SecTokenLifeTime
 
     | 
  
  
    | 
      558
     | 
    
                                            : $this->iTokenLifeTime;
 
     | 
  
  
    | 
      559
     | 
    
              }
 
     | 
  
  
    | 
      560
     | 
    
              $this->iNetmaskLengthV4 = ($this->iNetmaskLengthV4 < 1 || $this->iNetmaskLengthV4 > 32)
 
     | 
  
  
    | 
      561
     | 
    
                                        ? 0 :$this->iNetmaskLengthV4;
 
     | 
  
  
    | 
      562
     | 
    
              $this->iNetmaskLengthV6 = ($this->iNetmaskLengthV6 < 1 || $this->iNetmaskLengthV6 > 128)
 
     | 
  
  
    | 
      563
     | 
    
                                        ? 0 :$this->iNetmaskLengthV6;
 
     | 
  
  
    | 
      564
     | 
    
              $this->iTokenLifeTime   = $this->sanitizeLifeTime($this->iTokenLifeTime);
 
     | 
  
  
    | 
      565
     | 
    
              if ($this->iTokenLifeTime <= self::LIFETIME_MIN && DEBUG) {
     | 
  
  
    | 
      566
     | 
    
                  $this->iTokenLifeTime = self::DEBUG_LIFETIME;
 
     | 
  
  
    | 
      567
     | 
    
              }
 
     | 
  
  
    | 
      568
     | 
    
          }
 
     | 
  
  
    | 
      569
     | 
    
      
 
     | 
  
  
    | 
      570
     | 
    
      
 
     | 
  
  
    | 
      571
     | 
    
      } // end of class SecureTokens
 
     |