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File modpbkdf2.class.php

<?php
/**
 * This file contains a modHash implementation of RSA PDKDF2.
 * @package modx
 * @subpackage hashing
 */

/**
 * A PBKDF2 implementation of modHash.
 *
 * {@inheritdoc}
 *
 * @package modx
 * @subpackage hashing
 */
 
class modPBKDF2 extends modHash {
    /**
     * Generate a hash of a string using the RSA PBKDFA2 specification.
     *
     * The following options are available:
     *  - salt (required): a valid, non-empty string to salt the hashes
     *  - iterations: the number of iterations per block, default is 1000 (< 1000 not recommended)
     *  - derived_key_length: the size of the derived key to generate, default is 32
     *  - algorithm: the hash algorithm to use, default is sha256
     *  - raw_output: if true, returns binary output, otherwise derived key is base64_encode()'d; default is false
     *
     * @param string $string A string to generate a secure hash from.
     * @param array $options An array of options to be passed to the hash implementation.
     * @return mixed The hash result or false on failure.
     */
    public function hash($string, array $options = array()) {
        $derivedKey = false;
        $salt = $this->getOption('salt', $options, false);
        if (is_string($salt) && strlen($salt) > 0) {
            $iterations = (integer) $this->getOption('iterations', $options, 1000);
            $derivedKeyLength = (integer) $this->getOption('derived_key_length', $options, 32);
            $algorithm = $this->getOption('algorithm', $options, 'sha256');

$hashLength = strlen(hash($algorithm, null, true));
            $keyBlocks = ceil($derivedKeyLength / $hashLength);
            $derivedKey = '';
            for ($block = 1; $block <= $keyBlocks; $block++) {
                $hashBlock = $hb = hash_hmac($algorithm, $salt . pack('N', $block), $string, true);
                for ($blockIteration = 1; $blockIteration < $iterations; $blockIteration++) {
                    $hashBlock ^= ($hb = hash_hmac($algorithm, $hb, $string, true));
                }
                $derivedKey .= $hashBlock;
            }
            $derivedKey = substr($derivedKey, 0, $derivedKeyLength);
            if (!$this->getOption('raw_output', $options, false)) {
                $derivedKey = base64_encode($derivedKey);
            }
        } else {
            $this->host->modx->log(modX::LOG_LEVEL_ERROR, "PBKDF2 requires a valid salt string.", '', __METHOD__, __FILE__, __LINE__);
        }
        return $derivedKey;
    }
	
	
}

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
..	DIR	-	drwxr-xr-x	2025-10-25 09:38:52
images	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
php53	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
php56	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
php71	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
php81	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
php82	DIR	-	drwxr-xr-x	2025-04-06 09:38:46
changelog.txt	text/plain	8.75 KB	-rw-r--r--	2025-04-03 05:04:46
clone.php	text/x-php	8.03 KB	-rw-r--r--	2025-04-03 07:47:38
config.core.php	text/x-php	287 B	-rw-r--r--	2021-12-23 06:54:36
config.inc.php	text/x-php	3.14 KB	-rw-r--r--	2024-12-19 04:08:46
edit.php	text/x-php	5.37 KB	-rw-r--r--	2025-04-03 07:47:38
edit.xml	text/html	433 B	-rw-r--r--	2021-12-23 06:54:36
extend.php	text/x-php	11.66 KB	-rw-r--r--	2025-04-03 07:47:38
fileindex.php	text/plain	72 B	-rw-r--r--	2021-12-23 06:54:36
import.php	text/x-php	3.85 KB	-rw-r--r--	2025-04-03 07:47:38
info.xml	text/html	3.78 KB	-rw-r--r--	2025-04-03 05:04:46
install.js	text/plain	921 B	-rw-r--r--	2021-12-23 06:54:36
install.php	text/x-php	6.45 KB	-rw-r--r--	2025-04-03 07:47:38
install.xml	text/html	1.05 KB	-rw-r--r--	2022-04-29 07:16:08
md5	text/plain	3.22 KB	-rw-r--r--	2025-04-03 07:47:38
modhashing.class.php	text/x-php	6.16 KB	-rw-r--r--	2021-12-23 06:54:36
modpbkdf2.class.php	text/x-php	2.45 KB	-rw-r--r--	2021-12-23 06:54:36
notes.txt	text/plain	1.52 KB	-rw-r--r--	2025-04-03 05:04:46
update_pass.php	text/x-php	672 B	-rw-r--r--	2021-12-23 06:54:36
upgrade.php	text/x-php	4 KB	-rw-r--r--	2025-04-03 07:47:38
upgrade.xml	text/plain	436 B	-rw-r--r--	2024-12-19 04:08:46
xpdo.class.php	text/x-php	129.25 KB	-rw-r--r--	2021-12-23 06:54:36

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