include/Zend/Crypt/Math.php

-<?php
-/**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * @category   Zend
- * @package    Zend_Crypt
- * @subpackage Math
- * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
- * @license    http://framework.zend.com/license/new-bsd     New BSD License
- * @version    $Id: Math.php 24593 2012-01-05 20:35:02Z matthew $
- */
-
-/**
- * @see Zend_Crypt_Math_BigInteger
- */
-require_once 'Zend/Crypt/Math/BigInteger.php';
-
-/**
- * @category   Zend
- * @package    Zend_Crypt
- * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
- * @license    http://framework.zend.com/license/new-bsd     New BSD License
- */
-class Zend_Crypt_Math extends Zend_Crypt_Math_BigInteger
-{
-
-    /**
-     * Generate a pseudorandom number within the given range.
-     * Will attempt to read from a systems RNG if it exists or else utilises
-     * a simple random character to maximum length process. Simplicity
-     * is a factor better left for development...
-     *
-     * @param string|int $minimum
-     * @param string|int $maximum
-     * @return string
-     */
-    public function rand($minimum, $maximum)
-    {
-        if (file_exists('/dev/urandom')) {
-            $frandom = fopen('/dev/urandom', 'r');
-            if ($frandom !== false) {
-                return fread($frandom, strlen($maximum) - 1);
-            }
-        }
-        if (strlen($maximum) < 4) {
-            return mt_rand($minimum, $maximum - 1);
-        }
-        $rand = '';
-        $i2 = strlen($maximum) - 1;
-        for ($i = 1;$i < $i2;$i++) {
-            $rand .= mt_rand(0,9);
-        }
-        $rand .= mt_rand(0,9);
-        return $rand;
-    }
-
-    /**
-     * Get the big endian two's complement of a given big integer in
-     * binary notation
-     *
-     * @param string $long
-     * @return string
-     */
-    public function btwoc($long) {
-        if (ord($long[0]) > 127) {
-            return "\x00" . $long;
-        }
-        return $long;
-    }
-
-    /**
-     * Translate a binary form into a big integer string
-     *
-     * @param string $binary
-     * @return string
-     */
-    public function fromBinary($binary) {
-        return $this->_math->binaryToInteger($binary);
-    }
-
-    /**
-     * Translate a big integer string into a binary form
-     *
-     * @param string $integer
-     * @return string
-     */
-    public function toBinary($integer)
-    {
-        return $this->_math->integerToBinary($integer);
-    }
-
-}