62 lines
2.2 KiB
PHP
62 lines
2.2 KiB
PHP
<?php
|
|
|
|
namespace PHPExcel\Shared;
|
|
|
|
/**
|
|
* PHPExcel_Shared_PasswordHasher
|
|
*
|
|
* Copyright (c) 2006 - 2015 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 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
|
|
* @version ##VERSION##, ##DATE##
|
|
*/
|
|
class 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)));
|
|
}
|
|
}
|