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<?php |
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/** |
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* Implements the Pbkdf2Password class for the MediaWiki software. |
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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 2 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 along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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*/ |
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/** |
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* A PBKDF2-hashed password |
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* |
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* This is a computationally complex password hash for use in modern applications. |
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* The number of rounds can be configured by $wgPasswordConfig['pbkdf2']['cost']. |
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* |
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* @since 1.24 |
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*/ |
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class Pbkdf2Password extends ParameterizedPassword { |
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protected function getDefaultParams() { |
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return [ |
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'algo' => $this->config['algo'], |
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'rounds' => $this->config['cost'], |
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'length' => $this->config['length'] |
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]; |
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} |
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protected function getDelimiter() { |
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return ':'; |
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} |
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public function crypt( $password ) { |
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if ( count( $this->args ) == 0 ) { |
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$this->args[] = base64_encode( MWCryptRand::generate( 16, true ) ); |
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} |
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if ( function_exists( 'hash_pbkdf2' ) ) { |
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$hash = hash_pbkdf2( |
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$this->params['algo'], |
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$password, |
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base64_decode( $this->args[0] ), |
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(int)$this->params['rounds'], |
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(int)$this->params['length'], |
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true |
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); |
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if ( !is_string( $hash ) ) { |
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throw new PasswordError( 'Error when hashing password.' ); |
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} |
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} else { |
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$hashLenHash = hash( $this->params['algo'], '', true ); |
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if ( !is_string( $hashLenHash ) ) { |
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throw new PasswordError( 'Error when hashing password.' ); |
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} |
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$hashLen = strlen( $hashLenHash ); |
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$blockCount = ceil( $this->params['length'] / $hashLen ); |
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$hash = ''; |
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$salt = base64_decode( $this->args[0] ); |
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for ( $i = 1; $i <= $blockCount; ++$i ) { |
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$roundTotal = $lastRound = hash_hmac( |
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$this->params['algo'], |
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$salt . pack( 'N', $i ), |
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$password, |
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true |
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); |
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for ( $j = 1; $j < $this->params['rounds']; ++$j ) { |
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$lastRound = hash_hmac( $this->params['algo'], $lastRound, $password, true ); |
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$roundTotal ^= $lastRound; |
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} |
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$hash .= $roundTotal; |
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} |
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$hash = substr( $hash, 0, $this->params['length'] ); |
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} |
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$this->hash = base64_encode( $hash ); |
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} |
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} |
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wikimedia /
mediawiki
