diff options
Diffstat (limited to 'library/phpsec/Crypt/Random.php')
| -rw-r--r-- | library/phpsec/Crypt/Random.php | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/library/phpsec/Crypt/Random.php b/library/phpsec/Crypt/Random.php deleted file mode 100644 index a91c4d3c5..000000000 --- a/library/phpsec/Crypt/Random.php +++ /dev/null @@ -1,130 +0,0 @@ -<?php
-/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
-
-/**
- * Random Number Generator
- *
- * PHP versions 4 and 5
- *
- * Here's a short example of how to use this library:
- * <code>
- * <?php
- * include('Crypt/Random.php');
- *
- * echo crypt_random();
- * ?>
- * </code>
- *
- * LICENSE: This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- * @category Crypt
- * @package Crypt_Random
- * @author Jim Wigginton <terrafrost@php.net>
- * @copyright MMVII Jim Wigginton
- * @license http://www.gnu.org/licenses/lgpl.txt
- * @version $Id: Random.php,v 1.9 2010/04/24 06:40:48 terrafrost Exp $
- * @link http://phpseclib.sourceforge.net
- */
-
-/**
- * Generate a random value.
- *
- * On 32-bit machines, the largest distance that can exist between $min and $max is 2**31.
- * If $min and $max are farther apart than that then the last ($max - range) numbers.
- *
- * Depending on how this is being used, it may be worth while to write a replacement. For example,
- * a PHP-based web app that stores its data in an SQL database can collect more entropy than this function
- * can.
- *
- * @param optional Integer $min
- * @param optional Integer $max
- * @return Integer
- * @access public
- */
-function crypt_random($min = 0, $max = 0x7FFFFFFF)
-{
- if ($min == $max) {
- return $min;
- }
-
- // see http://en.wikipedia.org/wiki//dev/random
- // if open_basedir is enabled file_exists() will ouput an "open_basedir restriction in effect" warning,
- // so we suppress it.
- if (@file_exists('/dev/urandom')) {
- static $fp;
- if (!$fp) {
- $fp = fopen('/dev/urandom', 'rb');
- }
- extract(unpack('Nrandom', fread($fp, 4)));
-
- // say $min = 0 and $max = 3. if we didn't do abs() then we could have stuff like this:
- // -4 % 3 + 0 = -1, even though -1 < $min
- return abs($random) % ($max - $min) + $min;
- }
-
- /* Prior to PHP 4.2.0, mt_srand() had to be called before mt_rand() could be called.
- Prior to PHP 5.2.6, mt_rand()'s automatic seeding was subpar, as elaborated here:
-
- http://www.suspekt.org/2008/08/17/mt_srand-and-not-so-random-numbers/
-
- The seeding routine is pretty much ripped from PHP's own internal GENERATE_SEED() macro:
-
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3_2/ext/standard/php_rand.h?view=markup */
- if (version_compare(PHP_VERSION, '5.2.5', '<=')) {
- static $seeded;
- if (!isset($seeded)) {
- $seeded = true;
- mt_srand(fmod(time() * getmypid(), 0x7FFFFFFF) ^ fmod(1000000 * lcg_value(), 0x7FFFFFFF));
- }
- }
-
- static $crypto;
-
- // The CSPRNG's Yarrow and Fortuna periodically reseed. This function can be reseeded by hitting F5
- // in the browser and reloading the page.
-
- if (!isset($crypto)) {
- $key = $iv = '';
- for ($i = 0; $i < 8; $i++) {
- $key.= pack('n', mt_rand(0, 0xFFFF));
- $iv .= pack('n', mt_rand(0, 0xFFFF));
- }
- switch (true) {
- case class_exists('Crypt_AES'):
- $crypto = new Crypt_AES(CRYPT_AES_MODE_CTR);
- break;
- case class_exists('Crypt_TripleDES'):
- $crypto = new Crypt_TripleDES(CRYPT_DES_MODE_CTR);
- break;
- case class_exists('Crypt_DES'):
- $crypto = new Crypt_DES(CRYPT_DES_MODE_CTR);
- break;
- case class_exists('Crypt_RC4'):
- $crypto = new Crypt_RC4();
- break;
- default:
- extract(unpack('Nrandom', pack('H*', sha1(mt_rand(0, 0x7FFFFFFF)))));
- return abs($random) % ($max - $min) + $min;
- }
- $crypto->setKey($key);
- $crypto->setIV($iv);
- $crypto->enableContinuousBuffer();
- }
-
- extract(unpack('Nrandom', $crypto->encrypt("\0\0\0\0")));
- return abs($random) % ($max - $min) + $min;
-}
-?>
\ No newline at end of file |