/**
* Look for a system-provided source of randomness, which is usually crytographically secure.
* /dev/urandom is tried first simply out of bias for Linux systems.
*/
public static function initRandom()
{
if (is_readable('/dev/urandom')) {
self::$randomSource = fopen('/dev/urandom', 'rb');
self::$randomFunc = 'randomFRead';
} else {
if (class_exists('COM', 0)) {
try {
self::$randomSource = new COM('CAPICOM.Utilities.1');
// See http://msdn.microsoft.com/en-us/library/aa388182(VS.85).aspx
self::$randomFunc = 'randomCOM';
} catch (Exception $e) {
}
}
}
return self::$randomFunc;
}
