mirror of
https://github.com/AuthMe/AuthMeReloaded.git
synced 2024-11-05 01:59:34 +01:00
54 lines
1.8 KiB
PHP
54 lines
1.8 KiB
PHP
<?php
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/***********************************************************
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* AuthMe website integration logic for PBKDF2 *
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* ------------------------------------------------------- *
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* See AuthMeController for details. *
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* *
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* Source: https://github.com/AuthMe/AuthMeReloaded/ *
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***********************************************************/
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class Pbkdf2 extends AuthMeController {
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/** @var string[] range of characters for salt generation */
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private $CHARS;
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const SALT_LENGTH = 16;
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const NUMBER_OF_ITERATIONS = 10000;
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public function __construct() {
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$this->CHARS = self::initCharRange();
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}
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protected function isValidPassword($password, $hash) {
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// hash := pbkdf2_sha256$iterations$salt$hash
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$parts = explode('$', $hash);
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return count($parts) === 4 && $hash === $this->computeHash($parts[1], $parts[2], $password);
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}
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protected function hash($password) {
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$salt = $this->generateSalt();
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return $this->computeHash(self::NUMBER_OF_ITERATIONS, $salt, $password);
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}
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private function computeHash($iterations, $salt, $password) {
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return 'pbkdf2_sha256$' . self::NUMBER_OF_ITERATIONS . '$' . $salt
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. '$' . hash_pbkdf2('sha256', $password, $salt, self::NUMBER_OF_ITERATIONS, 64, false);
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}
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/**
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* @return string randomly generated salt
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*/
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private function generateSalt() {
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$maxCharIndex = count($this->CHARS) - 1;
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$salt = '';
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for ($i = 0; $i < self::SALT_LENGTH; ++$i) {
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$salt .= $this->CHARS[mt_rand(0, $maxCharIndex)];
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}
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return $salt;
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}
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private static function initCharRange() {
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return array_merge(range('0', '9'), range('a', 'f'));
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}
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}
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