+++ /dev/null
-<?php
-
-/**
- * This file contains a 'core-d' version of the example helper classes for the
- * php-scrypt extension. It has been renamed from scrypt.php to this name so the
- * framework can easily find it. Also it now extends BaseFrameworkSystem, no
- * other modifications has been done (except this comment ;-) ).
- *
- * For license file, original README and CREDITS file, see
- * inc/classes/third_party/scrypt/.
- *
- * As with all cryptographic code; it is recommended that you use a tried and
- * tested library which uses this library; rather than rolling your own.
- *
- * PHP version 5
- *
- * @category Security
- * @package Scrypt
- * @author Dominic Black <thephenix@gmail.com>
- * @license http://www.opensource.org/licenses/BSD-2-Clause BSD 2-Clause License
- * @link http://github.com/DomBlack/php-scrypt
- */
-
-/**
- * This class abstracts away from scrypt module, allowing for easy use.
- *
- * You can create a new hash for a password by calling Scrypt:hashScrypt($password)
- *
- * You can check a password by calling Scrypt:checkScrypt($password, $hash)
- *
- * @category Security
- * @package Scrypt
- * @author Dominic Black <thephenix@gmail.com>
- * @author Roland Haeder <roland@mxchange.org>
- * @license http://www.opensource.org/licenses/BSD-2-Clause BSD 2-Clause License
- * @link http://github.com/DomBlack/php-scrypt
- */
-abstract class Scrypt extends BaseFrameworkSystem
-{
-
- /**
- *
- * @var int The key length
- */
- private static $_keyLength = 32;
-
- /**
- * Get the byte-length of the given string
- *
- * @param string $str Input string
- *
- * @return int
- */
- protected static function strlen ($str) {
- static $isShadowed = null;
-
- if ($isShadowed === null) {
- $isShadowed = extension_loaded('mbstring') &&
- ini_get('mbstring.func_overload') & 2;
- }
-
- if ($isShadowed) {
- return mb_strlen($str, '8bit');
- } else {
- return strlen($str);
- }
- }
-
- /**
- * Generates a random salt
- *
- * @param int $length The length of the salt
- *
- * @return string The salt
- */
- public static function generateScryptSalt ($length = 8)
- {
- $buffer = '';
- $buffer_valid = false;
- if (function_exists('mcrypt_create_iv') && !defined('PHALANGER')) {
- $buffer = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM);
- if ($buffer) {
- $buffer_valid = true;
- }
- }
- if (!$buffer_valid && function_exists('openssl_random_pseudo_bytes')) {
- $cryptoStrong = false;
- $buffer = openssl_random_pseudo_bytes($length, $cryptoStrong);
- if ($buffer && $cryptoStrong) {
- $buffer_valid = true;
- }
- }
- if (!$buffer_valid && BaseFrameworkSystem::isReadableFile('/dev/urandom')) {
- $f = fopen('/dev/urandom', 'r');
- $read = static::strlen($buffer);
- while ($read < $length) {
- $buffer .= fread($f, $length - $read);
- $read = static::strlen($buffer);
- }
- fclose($f);
- if ($read >= $length) {
- $buffer_valid = true;
- }
- }
- if (!$buffer_valid || static::strlen($buffer) < $length) {
- $bl = static::strlen($buffer);
- for ($i = 0; $i < $length; $i++) {
- if ($i < $bl) {
- $buffer[$i] = $buffer[$i] ^ chr(mt_rand(0, 255));
- } else {
- $buffer .= chr(mt_rand(0, 255));
- }
- }
- }
- $salt = str_replace(array('+', '$'), array('.', ''), base64_encode($buffer));
-
- return $salt;
- }
-
- /**
- * Create a password hash
- *
- * @param string $password The clear text password
- * @param string $salt The salt to use, or null to generate a random one
- * @param int $N The CPU difficultly (must be a power of 2, > 1)
- * @param int $r The memory difficultly
- * @param int $p The parallel difficultly
- *
- * @return string The hashed password
- */
- public static function hashScrypt ($password, $salt = false, $N = 16384, $r = 8, $p = 1)
- {
- if (!FrameworkFeature::isFeatureAvailable('hubcoin_reward')) {
- // Feature has been disabled
- throw new \InvalidArgumentException('Feature "scrypt" disabled.');
- }
-
- if ($N == 0 || ($N & ($N - 1)) != 0) {
- throw new \InvalidArgumentException('N must be > 0 and a power of 2');
- }
-
- if ($N > PHP_INT_MAX / 128 / $r) {
- throw new \InvalidArgumentException('Parameter N is too large');
- }
-
- if ($r > PHP_INT_MAX / 128 / $p) {
- throw new \InvalidArgumentException('Parameter r is too large');
- }
-
- if ($salt === false) {
- $salt = self::generateScryptSalt();
- } else {
- // Remove dollar signs from the salt, as we use that as a separator.
- $salt = str_replace(array('+', '$'), array('.', ''), base64_encode($salt));
- }
-
- $hash = scrypt($password, $salt, $N, $r, $p, self::$_keyLength);
-
- return $N . '$' . $r . '$' . $p . '$' . $salt . '$' . $hash;
- }
-
- /**
- * Check a clear text password against a hash
- *
- * @param string $password The clear text password
- * @param string $hash The hashed password
- *
- * @return boolean If the clear text matches
- */
- public static function checkScrypt ($password, $hash)
- {
- // Is there actually a hash?
- if (!$hash) {
- return false;
- }
-
- if (!FrameworkFeature::isFeatureAvailable('hubcoin_reward')) {
- // Feature has been disabled
- throw new \InvalidArgumentException('Feature "scrypt" disabled.');
- }
-
- list ($N, $r, $p, $salt, $hash) = explode('$', $hash);
-
- // No empty fields?
- if (empty($N) or empty($r) or empty($p) or empty($salt) or empty($hash)) {
- return false;
- }
-
- // Are numeric values numeric?
- if (!is_numeric($N) or !is_numeric($r) or !is_numeric($p)) {
- return false;
- }
-
- $calculated = scrypt($password, $salt, $N, $r, $p, self::$_keyLength);
-
- // Use compareScryptHashes to avoid timeing attacks
- return self::compareScryptHashes($hash, $calculated);
- }
-
- /**
- * Zend Framework (http://framework.zend.com/)
- *
- * @link http://github.com/zendframework/zf2 for the canonical source repository
- * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- *
- * Compare two strings to avoid timing attacks
- *
- * C function memcmp() internally used by PHP, exits as soon as a difference
- * is found in the two buffers. That makes possible of leaking
- * timing information useful to an attacker attempting to iteratively guess
- * the unknown string (e.g. password).
- *
- * @param string $expected
- * @param string $actual
- *
- * @return boolean If the two strings match.
- */
- public static function compareScryptHashes ($expected, $actual)
- {
- $expected = (string) $expected;
- $actual = (string) $actual;
- $lenExpected = static::strlen($expected);
- $lenActual = static::strlen($actual);
- $len = min($lenExpected, $lenActual);
-
- $result = 0;
- for ($i = 0; $i < $len; $i ++) {
- $result |= ord($expected[$i]) ^ ord($actual[$i]);
- }
- $result |= $lenExpected ^ $lenActual;
-
- return ($result === 0);
- }
-}
projects / core.git / blobdiff