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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @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;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Interface IEncryptionModule
*
* @package OCP\Encryption
* @since 8.1.0
*/
interface IEncryptionModule {
/**
* @return string defining the technical unique id
* @since 8.1.0
*/
public function getId();
/**
* In comparison to getKey() this function returns a human readable (maybe translated) name
*
* @return string
* @since 8.1.0
*/
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 string $mode php stream open mode
* @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 $header contain data as key-value pairs which should be
* written to the header, in case of a write operation
* or if no additional data is needed return a empty array
* @since 8.1.0
*/
public function begin($path, $user, $mode, 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
* @param string $position id of the last block (looks like "<Number>end")
*
* @return string remained data which should be written to the file in case
* of a write operation
*
* @since 8.1.0
* @since 9.0.0 parameter $position added
*/
public function end($path, $position);
/**
* encrypt data
*
* @param string $data you want to encrypt
* @param string $position position of the block we want to encrypt (starts with '0')
*
* @return mixed encrypted data
*
* @since 8.1.0
* @since 9.0.0 parameter $position added
*/
public function encrypt($data, $position);
/**
* decrypt data
*
* @param string $data you want to decrypt
* @param string $position position of the block we want to decrypt
*
* @return mixed decrypted data
*
* @since 8.1.0
* @since 9.0.0 parameter $position added
*/
public function decrypt($data, $position);
/**
* 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 $accessList who has access to the file contains the key 'users' and 'public'
* @return boolean
* @since 8.1.0
*/
public function update($path, $uid, array $accessList);
/**
* should the file be encrypted or not
*
* @param string $path
* @return boolean
* @since 8.1.0
*/
public function shouldEncrypt($path);
/**
* get size of the unencrypted payload per block.
* ownCloud read/write files with a block size of 8192 byte
*
* @param bool $signed
* @return int
* @since 8.1.0 optional parameter $signed was added in 9.0.0
*/
public function getUnencryptedBlockSize($signed = false);
/**
* check if the encryption module is able to read the file,
* e.g. if all encryption keys exists
*
* @param string $path
* @param string $uid user for whom we want to check if he can read the file
* @return boolean
* @since 8.1.0
*/
public function isReadable($path, $uid);
/**
* Initial encryption of all files
*
* @param InputInterface $input
* @param OutputInterface $output write some status information to the terminal during encryption
* @since 8.2.0
*/
public function encryptAll(InputInterface $input, OutputInterface $output);
/**
* prepare encryption module to decrypt all files
*
* @param InputInterface $input
* @param OutputInterface $output write some status information to the terminal during encryption
* @param $user (optional) for which the files should be decrypted, default = all users
* @return bool return false on failure or if it isn't supported by the module
* @since 8.2.0
*/
public function prepareDecryptAll(InputInterface $input, OutputInterface $output, $user = '');
/**
* Check if the module is ready to be used by that specific user.
* In case a module is not ready - because e.g. key pairs have not been generated
* upon login this method can return false before any operation starts and might
* cause issues during operations.
*
* @param string $user
* @return boolean
* @since 9.1.0
*/
public function isReadyForUser($user);
/**
* Does the encryption module needs a detailed list of users with access to the file?
* For example if the encryption module uses per-user encryption keys and needs to know
* the users with access to the file to encrypt/decrypt it.
*
* @since 13.0.0
* @return bool
*/
public function needDetailedAccessList();
}