/**
* Decrypt data after encryption
*
* @param string $data
* @return mixed
*/
public static function decrypt($data)
{
// Don't do anything with empty data
$data = trim($data);
if (empty($data) || is_string($data) == false && is_numeric($data) == false) {
return null;
}
// Detect data that is not encrypted
$data = urldecode($data);
if (strstr($data, '|=|') == false) {
return $data;
}
$array = explode('|=|', $data);
$encrypted = MageBridgeEncryptionHelper::base64_decode($array[0], true);
$key = MageBridgeEncryptionHelper::getSaltedKey($array[1]);
// PHP 5.5 version
if (version_compare(PHP_VERSION, '5.5.0') >= 0) {
try {
$td = mcrypt_module_open(MCRYPT_CAST_256, '', 'ecb', '');
$iv = substr($key, 0, mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB));
mcrypt_generic_init($td, $key, $iv);
$decrypted = mdecrypt_generic($td, $encrypted);
$decrypted = trim($decrypted);
return $decrypted;
} catch (Exception $e) {
Mage::getSingleton('magebridge/debug')->error("Error while decrypting: " . $e->getMessage());
return null;
}
} else {
try {
$iv = substr($key, 0, mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB));
$decrypted = @mcrypt_cfb(MCRYPT_CAST_256, $key, $encrypted, MCRYPT_DECRYPT, $iv);
$decrypted = trim($decrypted);
return $decrypted;
} catch (Exception $e) {
Mage::getSingleton('magebridge/debug')->error("Error while decrypting: " . $e->getMessage());
return null;
}
}
}
