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<?php
/**
* @author Björn Schießle <schiessle@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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\Encryption;
interface IEncryptionModule {
/**
* @return string defining the technical unique id
*/
public function getId();
/**
* In comparison to getKey() this function returns a human readable (maybe translated) name
*
* @return string
*/
public function getDisplayName();
/**
* start receiving chunks from a file. This is the place where you can
* perform some initial step before starting encrypting/decrypting the
* chunks
*
* @param string $path to the file
* @param string $user who read/write the file (null for public access)
* @param array $header contains the header data read from the file
* @param array $accessList who has access to the file contains the key 'users' and 'public'
*
* $return array $header contain data as key-value pairs which should be
* written to the header, in case of a write operation
* or if no additional data is needed return a empty array
*/
public function begin($path, $user, array $header, array $accessList);
/**
* last chunk received. This is the place where you can perform some final
* operation and return some remaining data if something is left in your
* buffer.
*
* @param string $path to the file
* @return string remained data which should be written to the file in case
* of a write operation
*/
public function end($path);
/**
* encrypt data
*
* @param string $data you want to encrypt
* @return mixed encrypted data
*/
public function encrypt($data);
/**
* decrypt data
*
* @param string $data you want to decrypt
* @return mixed decrypted data
*/
public function decrypt($data);
/**
* update encrypted file, e.g. give additional users access to the file
*
* @param string $path path to the file which should be updated
* @param string $uid of the user who performs the operation
* @param array $accessList who has access to the file contains the key 'users' and 'public'
* @return boolean
*/
public function update($path, $uid, array $accessList);
/**
* should the file be encrypted or not
*
* @param string $path
* @return boolean
*/
public function shouldEncrypt($path);
/**
* calculate unencrypted size
*
* @param string $path to file
* @return integer unencrypted size
*/
public function calculateUnencryptedSize($path);
/**
* get size of the unencrypted payload per block.
* ownCloud read/write files with a block size of 8192 byte
*
* @return integer
*/
public function getUnencryptedBlockSize();
}
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