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<?php |
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/** |
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* PHPExcel |
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* |
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* Copyright (c) 2006 - 2014 PHPExcel |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* @category PHPExcel |
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* @package PHPExcel_Shared |
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* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel) |
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL |
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* @version ##VERSION##, ##DATE## |
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*/ |
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|
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|
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/** |
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* PHPExcel_Shared_PasswordHasher |
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* |
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* @category PHPExcel |
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* @package PHPExcel_Shared |
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* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel) |
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*/ |
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class PHPExcel_Shared_PasswordHasher |
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{ |
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/** |
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* Create a password hash from a given string. |
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* |
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* This method is based on the algorithm provided by |
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* Daniel Rentz of OpenOffice and the PEAR package |
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* Spreadsheet_Excel_Writer by Xavier Noguer <xnoguer@rezebra.com>. |
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* |
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* @param string $pPassword Password to hash |
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* @return string Hashed password |
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*/ |
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public static function hashPassword($pPassword = '') { |
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$password = 0x0000; |
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$charPos = 1; // char position |
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|
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// split the plain text password in its component characters |
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$chars = preg_split('//', $pPassword, -1, PREG_SPLIT_NO_EMPTY); |
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foreach ($chars as $char) { |
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$value = ord($char) << $charPos++; // shifted ASCII value |
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$rotated_bits = $value >> 15; // rotated bits beyond bit 15 |
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$value &= 0x7fff; // first 15 bits |
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$password ^= ($value | $rotated_bits); |
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} |
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|
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$password ^= strlen($pPassword); |
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$password ^= 0xCE4B; |
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|
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return(strtoupper(dechex($password))); |
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} |
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} |
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