--- /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;
+ }
+
+}
projects / core.git / blobdiff