You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.5 KiB
77 lines
2.5 KiB
<?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')) { |
|
/** |
|
* Powered by ext/mcrypt (and thankfully NOT libmcrypt) |
|
* |
|
* @ref https://bugs.php.net/bug.php?id=55169 |
|
* @ref https://github.com/php/php-src/blob/c568ffe5171d942161fc8dda066bce844bdef676/ext/mcrypt/mcrypt.c#L1321-L1386 |
|
* |
|
* @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' |
|
); |
|
} |
|
|
|
$buf = @mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM); |
|
if ( |
|
$buf !== false |
|
&& |
|
RandomCompat_strlen($buf) === $bytes |
|
) { |
|
/** |
|
* Return our random entropy buffer here: |
|
*/ |
|
return $buf; |
|
} |
|
|
|
/** |
|
* If we reach here, PHP has failed us. |
|
*/ |
|
throw new Exception( |
|
'Could not gather sufficient random data' |
|
); |
|
} |
|
}
|
|
|