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<?php /** * Joomla! Content Management System * * @copyright (C) 2017 Open Source Matters, Inc. <https://www.joomla.org> * @license GNU General Public License version 2 or later; see LICENSE.txt */ namespace Joomla\CMS\Crypt\Cipher; \defined('JPATH_PLATFORM') or die; use Joomla\Crypt\CipherInterface; use Joomla\Crypt\Key; /** * Crypt cipher for encryption, decryption and key generation via the php-encryption library. * * @since 3.5 * @deprecated 5.0 Without replacement use SodiumCipher */ class CryptoCipher implements CipherInterface { /** * Method to decrypt a data string. * * @param string $data The encrypted string to decrypt. * @param Key $key The key object to use for decryption. * * @return string The decrypted data string. * * @since 3.5 * @throws \RuntimeException */ public function decrypt($data, Key $key) { // Validate key. if ($key->getType() !== 'crypto') { throw new \InvalidArgumentException('Invalid key of type: ' . $key->getType() . '. Expected crypto.'); } // Decrypt the data. try { return \Crypto::Decrypt($data, $key->getPublic()); } catch (\InvalidCiphertextException $ex) { throw new \RuntimeException('DANGER! DANGER! The ciphertext has been tampered with!', $ex->getCode(), $ex); } catch (\CryptoTestFailedException $ex) { throw new \RuntimeException('Cannot safely perform decryption', $ex->getCode(), $ex); } catch (\CannotPerformOperationException $ex) { throw new \RuntimeException('Cannot safely perform decryption', $ex->getCode(), $ex); } } /** * Method to encrypt a data string. * * @param string $data The data string to encrypt. * @param Key $key The key object to use for encryption. * * @return string The encrypted data string. * * @since 3.5 * @throws \RuntimeException */ public function encrypt($data, Key $key) { // Validate key. if ($key->getType() !== 'crypto') { throw new \InvalidArgumentException('Invalid key of type: ' . $key->getType() . '. Expected crypto.'); } // Encrypt the data. try { return \Crypto::Encrypt($data, $key->getPublic()); } catch (\CryptoTestFailedException $ex) { throw new \RuntimeException('Cannot safely perform encryption', $ex->getCode(), $ex); } catch (\CannotPerformOperationException $ex) { throw new \RuntimeException('Cannot safely perform encryption', $ex->getCode(), $ex); } } /** * Method to generate a new encryption key object. * * @param array $options Key generation options. * * @return Key * * @since 3.5 * @throws \RuntimeException */ public function generateKey(array $options = array()) { // Generate the encryption key. try { $public = \Crypto::CreateNewRandomKey(); } catch (\CryptoTestFailedException $ex) { throw new \RuntimeException('Cannot safely create a key', $ex->getCode(), $ex); } catch (\CannotPerformOperationException $ex) { throw new \RuntimeException('Cannot safely create a key', $ex->getCode(), $ex); } // Explicitly flag the private as unused in this cipher. $private = 'unused'; return new Key('crypto', $private, $public); } /** * Check if the cipher is supported in this environment. * * @return boolean * * @since 4.0.0 */ public static function isSupported(): bool { try { \Crypto::RuntimeTest(); return true; } catch (\CryptoTestFailedException $e) { return false; } } }