/**
* @param string $algorithm
* @throws Zend_Crypt_Exception
*/
protected static function _detectHashSupport($algorithm)
{
if (function_exists('hash')) {
self::$_type = self::TYPE_HASH;
if (in_array($algorithm, hash_algos())) {
return;
}
}
if (function_exists('mhash')) {
self::$_type = self::TYPE_MHASH;
if (in_array($algorithm, self::$_supportedAlgosMhash)) {
return;
}
}
if (function_exists('openssl_digest')) {
if ($algorithm == 'ripemd160') {
$algorithm = 'rmd160';
}
self::$_type = self::TYPE_OPENSSL;
if (in_array($algorithm, self::$_supportedAlgosOpenssl)) {
return;
}
}
/**
* @see Zend_Crypt_Exception
*/
require_once 'Zend/Crypt/Exception.php';
throw new Zend_Crypt_Exception('\'' . $algorithm . '\' is not supported by any available extension or native function');
}
