diff options
Diffstat (limited to 'models/Auth/OpenID/CryptUtil.php')
-rw-r--r-- | models/Auth/OpenID/CryptUtil.php | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/models/Auth/OpenID/CryptUtil.php b/models/Auth/OpenID/CryptUtil.php deleted file mode 100644 index a92626777..000000000 --- a/models/Auth/OpenID/CryptUtil.php +++ /dev/null @@ -1,108 +0,0 @@ -<?php - -/** - * CryptUtil: A suite of wrapper utility functions for the OpenID - * library. - * - * PHP versions 4 and 5 - * - * LICENSE: See the COPYING file included in this distribution. - * - * @access private - * @package OpenID - * @author JanRain, Inc. <openid@janrain.com> - * @copyright 2005-2008 Janrain, Inc. - * @license http://www.apache.org/licenses/LICENSE-2.0 Apache - */ - -if (!defined('Auth_OpenID_RAND_SOURCE')) { - /** - * The filename for a source of random bytes. Define this yourself - * if you have a different source of randomness. - */ - define('Auth_OpenID_RAND_SOURCE', '/dev/urandom'); -} - -class Auth_OpenID_CryptUtil { - /** - * Get the specified number of random bytes. - * - * Attempts to use a cryptographically secure (not predictable) - * source of randomness if available. If there is no high-entropy - * randomness source available, it will fail. As a last resort, - * for non-critical systems, define - * <code>Auth_OpenID_RAND_SOURCE</code> as <code>null</code>, and - * the code will fall back on a pseudo-random number generator. - * - * @param int $num_bytes The length of the return value - * @return string $bytes random bytes - */ - static function getBytes($num_bytes) - { - static $f = null; - $bytes = ''; - if ($f === null) { - if (Auth_OpenID_RAND_SOURCE === null) { - $f = false; - } else { - $f = @fopen(Auth_OpenID_RAND_SOURCE, "r"); - if ($f === false) { - $msg = 'Define Auth_OpenID_RAND_SOURCE as null to ' . - ' continue with an insecure random number generator.'; - trigger_error($msg, E_USER_ERROR); - } - } - } - if ($f === false) { - // pseudorandom used - $bytes = ''; - for ($i = 0; $i < $num_bytes; $i += 4) { - $bytes .= pack('L', mt_rand()); - } - $bytes = substr($bytes, 0, $num_bytes); - } else { - $bytes = fread($f, $num_bytes); - } - return $bytes; - } - - /** - * Produce a string of length random bytes, chosen from chrs. If - * $chrs is null, the resulting string may contain any characters. - * - * @param integer $length The length of the resulting - * randomly-generated string - * @param string $chrs A string of characters from which to choose - * to build the new string - * @return string $result A string of randomly-chosen characters - * from $chrs - */ - static function randomString($length, $population = null) - { - if ($population === null) { - return Auth_OpenID_CryptUtil::getBytes($length); - } - - $popsize = strlen($population); - - if ($popsize > 256) { - $msg = 'More than 256 characters supplied to ' . __FUNCTION__; - trigger_error($msg, E_USER_ERROR); - } - - $duplicate = 256 % $popsize; - - $str = ""; - for ($i = 0; $i < $length; $i++) { - do { - $n = ord(Auth_OpenID_CryptUtil::getBytes(1)); - } while ($n < $duplicate); - - $n %= $popsize; - $str .= $population[$n]; - } - - return $str; - } -} - |