/**
* Change encryption key
*
* @throws Exception
* @param string $key
* @return string
*/
public function changeEncryptionKey($key = null)
{
// prepare new key, encryptor and new file contents
$file = Mage::getBaseDir('etc') . DS . 'local.xml';
if (!is_writeable($file)) {
throw new Exception(Mage::helper('enterprise_pci')->__('File %s is not writeable.', realpath($file)));
}
$contents = file_get_contents($file);
if (null === $key) {
$key = md5(time());
}
$this->_encryptor = clone Mage::helper('core')->getEncryptor();
$this->_encryptor->setNewKey($key);
$contents = preg_replace('/<key><\\!\\[CDATA\\[(.+?)\\]\\]><\\/key>/s', '<key><![CDATA[' . $this->_encryptor->exportKeys() . ']]></key>', $contents);
// update database and local.xml
$this->beginTransaction();
try {
$this->_reEncryptSystemConfigurationValues();
$this->_reEncryptCreditCardNumbers();
file_put_contents($file, $contents);
$this->commit();
return $key;
} catch (Exception $e) {
$this->rollBack();
throw $e;
}
}
