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✎ EDIT FILE

EDITING: random_bytes_com_dotnet.php

<?php
/**
 * Random_* Compatibility Library 
 * for using the new PHP 7 random_* API in PHP 5 projects
 * 
 * The MIT License (MIT)
 * 
 * Copyright (c) 2015 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.
 */

/**
 * 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 = '';
    $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'
    );
}

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📄 byte_safe_strings.php	PHP	5.5 KB	2016-03-08 18:15	EDIT
📄 cast_to_int.php	PHP	2.4 KB	2016-03-08 18:15	EDIT
📄 error_polyfill.php	PHP	1.5 KB	2015-10-23 06:22	EDIT
📄 random.php	PHP	7.5 KB	2016-03-08 18:15	EDIT
📄 random_bytes_com_dotnet.php	PHP	2.5 KB	2016-03-08 18:15	EDIT
📄 random_bytes_dev_urandom.php	PHP	4.4 KB	2016-03-08 18:15	EDIT
📄 random_bytes_libsodium.php	PHP	2.5 KB	2016-03-08 18:15	EDIT
📄 random_bytes_libsodium_legacy.php	PHP	2.5 KB	2016-03-08 18:15	EDIT
📄 random_bytes_mcrypt.php	PHP	2.3 KB	2016-03-08 18:15	EDIT
📄 random_bytes_openssl.php	PHP	2.5 KB	2016-03-08 18:15	EDIT
📄 random_int.php	PHP	5.6 KB	2016-03-08 18:15	EDIT