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Direktori : /proc/self/root/proc/self/root/var/softaculous/modx/ |
Current File : //proc/self/root/proc/self/root/var/softaculous/modx/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; } }