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File: vendor/paragonie/random_compat/lib/random_bytes_com_dotnet.php

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  Classes of Renato De Oliveira Lucena  >  PHP Pokemon Script  >  vendor/paragonie/random_compat/lib/random_bytes_com_dotnet.php  >  Download  
File: vendor/paragonie/random_compat/lib/random_bytes_com_dotnet.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP Pokemon Script
Provides an API to manage a database of Pokemons
Author: By
Last change:
Date: 1 year ago
Size: 2,903 bytes
 

 

Contents

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<?php
/**
 * Random_* Compatibility Library
 * for using the new PHP 7 random_* API in PHP 5 projects
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

if (!is_callable('random_bytes')) {
   
/**
     * Windows with PHP < 5.3.0 will not have the function
     * openssl_random_pseudo_bytes() available, so let's use
     * CAPICOM to work around this deficiency.
     *
     * @param int $bytes
     *
     * @throws Exception
     *
     * @return string
     */
   
function random_bytes($bytes)
    {
        try {
           
$bytes = RandomCompat_intval($bytes);
        } catch (
TypeError $ex) {
            throw new
TypeError(
               
'random_bytes(): $bytes must be an integer'
           
);
        }

        if (
$bytes < 1) {
            throw new
Error(
               
'Length must be greater than 0'
           
);
        }

       
$buf = '';
        if (!
class_exists('COM')) {
            throw new
Error(
               
'COM does not exist'
           
);
        }
       
$util = new COM('CAPICOM.Utilities.1');
       
$execCount = 0;

       
/**
         * Let's not let it loop forever. If we run N times and fail to
         * get N bytes of random data, then CAPICOM has failed us.
         */
       
do {
           
$buf .= base64_decode($util->GetRandom($bytes, 0));
            if (
RandomCompat_strlen($buf) >= $bytes) {
               
/**
                 * Return our random entropy buffer here:
                 */
               
return RandomCompat_substr($buf, 0, $bytes);
            }
            ++
$execCount;
        } while (
$execCount < $bytes);

       
/**
         * If we reach here, PHP has failed us.
         */
       
throw new Exception(
           
'Could not gather sufficient random data'
       
);
    }
}