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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCP\Security;
/**
* Class Crypto provides a high-level encryption layer using AES-CBC. If no key has been provided
* it will use the secret defined in config.php as key. Additionally the message will be HMAC'd.
*
* Usage:
* $encryptWithDefaultPassword = \OC::$server->getCrypto()->encrypt('EncryptedText');
* $encryptWithCustomPassword = \OC::$server->getCrypto()->encrypt('EncryptedText', 'password');
*
* @package OCP\Security
* @since 8.0.0
*/
interface ICrypto {
/**
* @param string $message The message to authenticate
* @param string $password Password to use (defaults to `secret` in config.php)
* @return string Calculated HMAC
* @since 8.0.0
*/
public function calculateHMAC($message, $password = '');
/**
* Encrypts a value and adds an HMAC (Encrypt-Then-MAC)
* @param string $plaintext
* @param string $password Password to encrypt, if not specified the secret from config.php will be taken
* @return string Authenticated ciphertext
* @since 8.0.0
*/
public function encrypt($plaintext, $password = '');
/**
* Decrypts a value and verifies the HMAC (Encrypt-Then-Mac)
* @param string $authenticatedCiphertext
* @param string $password Password to encrypt, if not specified the secret from config.php will be taken
* @return string plaintext
* @throws \Exception If the HMAC does not match
* @since 8.0.0
*/
public function decrypt($authenticatedCiphertext, $password = '');
}