includes/password/Pbkdf2Password.php

   1 <?php
   2 /**
   3  * Implements the Pbkdf2Password class for the MediaWiki software.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * A PBKDF2-hashed password
  25  *
  26  * This is a computationally complex password hash for use in modern applications.
  27  * The number of rounds can be configured by $wgPasswordConfig['pbkdf2']['cost'].
  28  *
  29  * @since 1.24
  30  */
  31 class Pbkdf2Password extends ParameterizedPassword {
  32         protected function getDefaultParams() {
  33                 return [
  34                         'algo' => $this->config['algo'],
  35                         'rounds' => $this->config['cost'],
  36                         'length' => $this->config['length']
  37                 ];
  38         }
  39
  40         protected function getDelimiter() {
  41                 return ':';
  42         }
  43
  44         public function crypt( $password ) {
  45                 if ( count( $this->args ) == 0 ) {
  46                         $this->args[] = base64_encode( random_bytes( 16 ) );
  47                 }
  48
  49                 $hash = hash_pbkdf2(
  50                         $this->params['algo'],
  51                         $password,
  52                         base64_decode( $this->args[0] ),
  53                         (int)$this->params['rounds'],
  54                         (int)$this->params['length'],
  55                         true
  56                 );
  57                 if ( !is_string( $hash ) ) {
  58                         throw new PasswordError( 'Error when hashing password.' );
  59                 }
  60
  61                 $this->hash = base64_encode( $hash );
  62         }
  63 }