/**
*
* Returns a cryptographically secure random value.
*
* @param integer $bytes How many bytes to return
*
* @return string
*/
public function generate($bytes = 32)
{
if ($this->phpfunc->extension_loaded('openssl') && (version_compare(PHP_VERSION, '5.3.4') >= 0 || IS_WIN)) {
$strong = false;
$randBytes = openssl_random_pseudo_bytes($bytes, $strong);
if ($strong) {
return $randBytes;
}
}
if ($this->phpfunc->extension_loaded('mcrypt')) {
return $this->phpfunc->mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM);
}
return $this->genRandomBytes($bytes);
}