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<?php
/**
* ownCloud
*
* @copyright (C) 2015 ownCloud, Inc.
*
* @author Bjoern Schiessle <schiessle@owncloud.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
namespace OCA\Encryption_Dummy;
use OCP\Encryption\IEncryptionModule;
class DummyModule implements IEncryptionModule {
/** @var boolean */
protected $isWriteOperation;
/**
* @return string defining the technical unique id
*/
public function getId() {
return "OC_DUMMY_MODULE";
}
/**
* In comparison to getKey() this function returns a human readable (maybe translated) name
*
* @return string
*/
public function getDisplayName() {
return "Dummy Encryption Module";
}
/**
* 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) {
return array();
}
/**
* 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) {
if ($this->isWriteOperation) {
$storage = \OC::$server->getEncryptionKeyStorage();
$storage->setFileKey($path, 'fileKey', 'foo', $this->getId());
}
return '';
}
/**
* encrypt data
*
* @param string $data you want to encrypt
* @return mixed encrypted data
*/
public function encrypt($data) {
$this->isWriteOperation = true;
return $data;
}
/**
* decrypt data
*
* @param string $data you want to decrypt
* @param string $user decrypt as user (null for public access)
* @return mixed decrypted data
*/
public function decrypt($data) {
$this->isWriteOperation=false;
return $data;
}
/**
* should the file be encrypted or not
*
* @param string $path
* @return boolean
*/
public function shouldEncrypt($path) {
if (strpos($path, '/'. \OCP\User::getUser() . '/files/') === 0) {
return true;
}
return false;
}
public function getUnencryptedBlockSize() {
return 6126;
}
/**
* 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) {
return true;
}
}
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