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src/lib/PHPExcel/Shared/PasswordHasher.php 2.32 KB
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  <?php

  /**

   * PHPExcel

   *

   * Copyright (c) 2006 - 2014 PHPExcel

   *

   * This library is free software; you can redistribute it and/or

   * modify it under the terms of the GNU Lesser General Public

   * License as published by the Free Software Foundation; either

   * version 2.1 of the License, or (at your option) any later version.

   *

   * This library is distributed in the hope that it will be useful,

   * but WITHOUT ANY WARRANTY; without even the implied warranty of

   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   * Lesser General Public License for more details.

   *

   * You should have received a copy of the GNU Lesser General Public

   * License along with this library; if not, write to the Free Software

   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

   *

   * @category   PHPExcel

   * @package    PHPExcel_Shared

   * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

   * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL

   * @version    1.8.0, 2014-03-02

   */

  

  

  /**

   * PHPExcel_Shared_PasswordHasher

   *

   * @category   PHPExcel

   * @package    PHPExcel_Shared

   * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

   */

  class PHPExcel_Shared_PasswordHasher

  {

  	/**

  	 * Create a password hash from a given string.

  	 *

  	 * This method is based on the algorithm provided by

  	 * Daniel Rentz of OpenOffice and the PEAR package

  	 * Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>.

  	 *

  	 * @param 	string	$pPassword	Password to hash

  	 * @return 	string				Hashed password

  	 */

  	public static function hashPassword($pPassword = '') {

          $password	= 0x0000;

          $charPos	= 1;       // char position

  

          // split the plain text password in its component characters

          $chars = preg_split('//', $pPassword, -1, PREG_SPLIT_NO_EMPTY);

          foreach ($chars as $char) {

              $value			= ord($char) << $charPos++;	// shifted ASCII value

              $rotated_bits	= $value >> 15;				// rotated bits beyond bit 15

              $value			&= 0x7fff;					// first 15 bits

              $password		^= ($value | $rotated_bits);

          }

  

          $password ^= strlen($pPassword);

          $password ^= 0xCE4B;

  

          return(strtoupper(dechex($password)));

  	}

  }