+++ /dev/null
-<?php
-// Own namespace
-namespace CoreFramework\Crypto\RandomNumber;
-
-// Import framework stuff
-use CoreFramework\Object\BaseFrameworkSystem;
-use CoreFramework\Generic\FrameworkInterface;
-
-/**
- * A standard random number generator
- *
- * @author Roland Haeder <webmaster@shipsimu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.shipsimu.org
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class RandomNumberGenerator extends BaseFrameworkSystem {
- /**
- * Prime number for better pseudo random numbers
- */
- private $prime = 0;
-
- /**
- * Add this calculated number to the rng
- */
- private $extraNumber = 0;
-
- /**
- * Extra salt for secured hashing
- */
- private $extraSalt = '';
-
- /**
- * Fixed salt for secured hashing
- */
- private $fixedSalt = '';
-
- /**
- * Maximum length for random string
- */
- private $rndStrLen = 0;
-
- /**
- * Self instance
- */
- private static $selfInstance = NULL;
-
- /**
- * Protected constructor
- *
- * @param $className Name of this class
- * @return void
- */
- protected function __construct ($className = __CLASS__) {
- // Call parent constructor
- parent::__construct($className);
- }
-
- /**
- * Creates an instance of this class
- *
- * @param $extraInstance An extra instance for more salt (default: null)
- * @return $rngInstance An instance of this random number generator
- */
- public static final function createRandomNumberGenerator (FrameworkInterface $extraInstance = NULL) {
- // Is self instance set?
- if (is_null(self::$selfInstance)) {
- // Get a new instance
- $rngInstance = new RandomNumberGenerator();
-
- // Initialize the RNG now
- $rngInstance->initRng($extraInstance);
-
- // Set it "self"
- self::$selfInstance = $rngInstance;
- } else {
- // Use from self instance
- $rngInstance = self::$selfInstance;
- }
-
- // Return the instance
- return $rngInstance;
- }
-
- /**
- * Initializes the random number generator
- *
- * @param $extraInstance An extra instance for more salt (default: null)
- * @return void
- * @todo Add site key for stronger salt!
- */
- protected function initRng ($extraInstance) {
- // Get the prime number from config
- $this->prime = $this->getConfigInstance()->getConfigEntry('math_prime');
-
- // Calculate the extra number which is always the same unless you give
- // a better prime number
- $this->extraNumber = ($this->prime * $this->prime / pow(pi(), 2));
-
- // Seed mt_rand()
- mt_srand((double) sqrt(microtime(TRUE) * 100000000 * $this->extraNumber));
-
- // Set the server IP to cluster
- $serverIp = 'cluster';
-
- // Do we have a single server?
- if ($this->getConfigInstance()->getConfigEntry('is_single_server') == 'Y') {
- // Then use that IP for extra security
- $serverIp = $this->getConfigInstance()->detectServerAddress();
- } // END - if
-
- // Yet-another fixed salt. This is not dependend on server software or date
- if ($extraInstance instanceof FrameworkInterface) {
- // With extra instance information
- $this->fixedSalt = sha1(
- $serverIp . ':' .
- $extraInstance->__toString() . ':' .
- json_encode($this->getDatabaseInstance()->getConnectionData())
- );
- } else {
- // Without extra information
- $this->fixedSalt = sha1($serverIp . ':' . json_encode($this->getDatabaseInstance()->getConnectionData()));
- }
-
- // One-way data we need for "extra-salting" the random number
- $this->extraSalt = sha1(
- $this->fixedSalt . ':' .
- getenv('SERVER_SOFTWARE') . ':' .
- $this->getConfigInstance()->getConfigEntry('date_key') . ':' .
- $this->getConfigInstance()->getConfigEntry('base_url')
- );
-
- // Get config entry for max salt length
- $this->rndStrLen = $this->getConfigInstance()->getConfigEntry('rnd_str_length');
- }
-
- /**
- * Makes a pseudo-random string useable for salts
- *
- * @param $length Length of the string, default: 128
- * @return $randomString The pseudo-random string
- */
- public function randomString ($length = -1) {
- // Is the number <1, then fix it to default length
- if ($length < 1) {
- $length = $this->rndStrLen;
- } // END - if
-
- // Initialize the string
- $randomString = '';
-
- // And generate it
- for ($idx = 0; $idx < $length; $idx++) {
- // Add a random character and add it to our string
- $randomString .= chr($this->randomNumber(0, 255));
- } // END - for
-
- // Return the random string a little mixed up
- return str_shuffle($randomString);
- }
-
- /**
- * Generate a pseudo-random integer number in a given range
- *
- * @param $min Min value to generate
- * @param $max Max value to generate
- * @return $num Pseudo-random number
- * @todo I had a better random number generator here but now it is somewhere lost :(
- */
- public function randomNumber ($min, $max) {
- return mt_rand($min, $max);
- }
-
- /**
- * Getter for extra salt
- *
- * @return $extraSalt
- */
- public final function getExtraSalt () {
- return $this->extraSalt;
- }
-
- /**
- * Getter for fixed salt
- *
- * @return $fixedSalt
- */
- public final function getFixedSalt () {
- return $this->fixedSalt;
- }
-
- /**
- * Generates a key based on if we have extra (default) or fixed salt enabled
- *
- * @return $key The generated key for encryption
- */
- public function generateKey () {
- // Default is extra salt
- $key = md5($this->getExtraSalt());
-
- // Get key
- if ($this->getConfigInstance()->getConfigEntry('crypt_fixed_salt') == 'Y') {
- $key = md5($this->getFixedSalt());
- } // END - if
-
- // Return it
- return $key;
- }
-
-}
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