+++ /dev/null
-<?php
-/**
- * A standard random number generator
- *
- * @author Roland Haeder <webmaster@ship-simu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, this is free software
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.ship-simu.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;
-
- /**
- * Protected constructor
- *
- * @param $className Name of this class
- * @return void
- */
- protected function __construct ($className = __CLASS__) {
- // Call parent constructor
- parent::__construct($className);
-
- // Clean up a little
- $this->removeNumberFormaters();
- $this->removeSystemArray();
- }
-
- /**
- * 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 final static function createRandomNumberGenerator (FrameworkInterface $extraInstance = null) {
- // Get a new instance
- $rngInstance = new RandomNumberGenerator();
-
- // Initialize the RNG now
- $rngInstance->initRng($extraInstance);
-
- // 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()->readConfig('math_prime');
-
- // Calculate the extra number which is always the same unless you give
- // a better prime number
- $this->extraNumber = ($this->prime * $this->prime / (pi() ^ 2));
-
- // Seed mt_rand()
- mt_srand((double) sqrt(microtime() * 100000000 * $this->extraNumber));
-
- // Set the server IP to cluster
- $serverIp = "cluster";
-
- // Do we have a single server?
- if ($this->getConfigInstance()->readConfig('is_single_server') === "Y") {
- // Then use that IP for extra security
- $serverIp = getenv('SERVER_ADDR');
- } // END - if
-
- // Yet-another fixed salt. This is not dependend on server software or date
- if ($extraInstance instanceof FrameworkInterface) {
- // With extra instance information
- $this->fixedSalt = sha1($serverIp . ":" . $extraInstance->__toString() . ":" . serialize($this->getDatabaseInstance()->getConnectionData()));
- } else {
- // Without extra information
- $this->fixedSalt = sha1($serverIp . ":" . serialize($this->getDatabaseInstance()->getConnectionData()));
- }
-
- // One-way data we need for "extra-salting" the random number
- $this->extraSalt = sha1($this->fixedSalt . ":" . getenv('SERVER_SOFTWARE') . ":" . $this->getConfigInstance()->readConfig('date_key') . $this->getConfigInstance()->readConfig('base_url'));
-
- // Get config entry for max salt length
- $this->rndStrLen = $this->getConfigInstance()->readConfig('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;
-
- // 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));
- }
-
- // 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;
- }
-}
-
-// [EOF]
-?>
projects / shipsimu.git / blobdiff