/**
* Get the supported algorithm
*
* @return array
*/
public static function getSupportedAlgorithms()
{
if (empty(self::$supportedAlgorithms)) {
self::$supportedAlgorithms = hash_algos();
}
return self::$supportedAlgorithms;
}
/**
* Setter for the hash method.
*
* @param string $hash
* @return void
*/
protected static function _setHashAlgorithm($hash)
{
if (!isset($hash) || empty($hash)) {
throw new HmacException('provided hash string is null or empty');
}
$hash = strtolower($hash);
$hashSupported = false;
if (function_exists('hash_algos') && in_array($hash, hash_algos())) {
$hashSupported = true;
}
if ($hashSupported === false && function_exists('mhash') && in_array($hash, self::$_supportedAlgosMhash)) {
$hashSupported = true;
}
if ($hashSupported === false) {
throw new HmacException('hash algorithm provided is not supported on this PHP installation; please enable the hash or mhash extensions');
}
self::$_hashAlgorithm = $hash;
}
