2012-08-14 22:06:56 +04:00
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<?php
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2013-01-24 22:37:34 +04:00
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2012-08-14 22:06:56 +04:00
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/**
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* ownCloud
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*
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* @author Sam Tuke
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* @copyright 2012 Sam Tuke samtuke@owncloud.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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2012-10-17 19:35:19 +04:00
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namespace OCA\Encryption;
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2012-08-14 22:06:56 +04:00
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2013-05-06 01:41:42 +04:00
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use OC\Files\Filesystem;
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2012-08-14 22:06:56 +04:00
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/**
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* Class for hook specific logic
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*/
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class Hooks {
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2013-01-24 22:37:34 +04:00
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// TODO: use passphrase for encrypting private key that is separate to
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// the login password
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2012-08-14 22:06:56 +04:00
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/**
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* @brief Startup encryption backend upon user login
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* @note This method should never be called for users using client side encryption
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*/
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public static function login( $params ) {
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2013-02-05 20:09:01 +04:00
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2013-02-06 18:30:40 +04:00
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// Manually initialise Filesystem{} singleton with correct
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// fake root path, in order to avoid fatal webdav errors
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2013-04-25 17:21:11 +04:00
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// NOTE: disabled because this give errors on webdav!
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//\OC\Files\Filesystem::init( $params['uid'], '/' . 'files' . '/' );
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2013-02-05 20:09:01 +04:00
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$view = new \OC_FilesystemView( '/' );
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2012-08-14 22:06:56 +04:00
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2013-05-01 03:38:06 +04:00
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$util = new Util( $view, $params['uid'] );
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2012-08-14 22:06:56 +04:00
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2013-02-06 18:30:40 +04:00
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// Check files_encryption infrastructure is ready for action
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2013-02-05 20:09:01 +04:00
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if ( ! $util->ready() ) {
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2012-08-15 21:49:53 +04:00
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2013-02-05 20:09:01 +04:00
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\OC_Log::write( 'Encryption library', 'User account "' . $params['uid'] . '" is not ready for encryption; configuration started', \OC_Log::DEBUG );
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2012-08-14 22:06:56 +04:00
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2013-05-01 04:01:16 +04:00
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if(!$util->setupServerSide( $params['password'] )) {
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return false;
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}
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2013-02-05 20:09:01 +04:00
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}
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\OC_FileProxy::$enabled = false;
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$encryptedKey = Keymanager::getPrivateKey( $view, $params['uid'] );
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\OC_FileProxy::$enabled = true;
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$privateKey = Crypt::symmetricDecryptFileContent( $encryptedKey, $params['password'] );
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2013-04-10 19:37:03 +04:00
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$session = new Session( $view );
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2013-02-05 20:09:01 +04:00
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$session->setPrivateKey( $privateKey, $params['uid'] );
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2013-05-04 18:14:38 +04:00
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// Check if first-run file migration has already been performed
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$migrationCompleted = $util->getMigrationStatus();
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2013-02-05 20:09:01 +04:00
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2013-05-04 18:14:38 +04:00
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// If migration not yet done
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if ( ! $migrationCompleted ) {
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2013-02-05 20:09:01 +04:00
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2013-05-04 18:14:38 +04:00
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$view1 = new \OC_FilesystemView( '/' . $params['uid'] );
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// Set legacy encryption key if it exists, to support
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// depreciated encryption system
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if (
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$view1->file_exists( 'encryption.key' )
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&& $encLegacyKey = $view1->file_get_contents( 'encryption.key' )
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) {
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2013-01-29 23:54:40 +04:00
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2013-05-04 18:14:38 +04:00
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$plainLegacyKey = Crypt::legacyDecrypt( $encLegacyKey, $params['password'] );
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$session->setLegacyKey( $plainLegacyKey );
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}
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\OC_FileProxy::$enabled = false;
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$publicKey = Keymanager::getPublicKey( $view, $params['uid'] );
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\OC_FileProxy::$enabled = false;
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// Encrypt existing user files:
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// This serves to upgrade old versions of the encryption
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// app (see appinfo/spec.txt)
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if (
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$util->encryptAll( $publicKey, '/' . $params['uid'] . '/' . 'files', $session->getLegacyKey(), $params['password'] )
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) {
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\OC_Log::write(
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'Encryption library', 'Encryption of existing files belonging to "' . $params['uid'] . '" completed'
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, \OC_Log::INFO
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);
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}
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// Register successful migration in DB
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$util->setMigrationStatus( 1 );
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2013-02-05 20:09:01 +04:00
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2013-05-04 18:14:38 +04:00
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}
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2012-08-14 22:06:56 +04:00
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return true;
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}
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2012-12-11 17:22:46 +04:00
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/**
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* @brief Change a user's encryption passphrase
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* @param array $params keys: uid, password
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*/
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public static function setPassphrase( $params ) {
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2013-02-06 21:59:47 +04:00
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2012-12-11 17:22:46 +04:00
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// Only attempt to change passphrase if server-side encryption
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// is in use (client-side encryption does not have access to
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// the necessary keys)
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if ( Crypt::mode() == 'server' ) {
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2013-04-30 01:37:08 +04:00
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$view = new \OC_FilesystemView( '/' );
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$session = new Session($view);
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2013-02-06 19:08:36 +04:00
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2012-12-11 19:15:30 +04:00
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// Get existing decrypted private key
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2013-02-06 19:08:36 +04:00
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$privateKey = $session->getPrivateKey();
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2012-12-11 17:22:46 +04:00
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2012-12-11 19:15:30 +04:00
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// Encrypt private key with new user pwd as passphrase
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$encryptedPrivateKey = Crypt::symmetricEncryptFileContent( $privateKey, $params['password'] );
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2012-12-11 17:22:46 +04:00
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// Save private key
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2012-12-11 19:15:30 +04:00
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Keymanager::setPrivateKey( $encryptedPrivateKey );
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2012-12-11 17:22:46 +04:00
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2013-01-24 22:37:34 +04:00
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// NOTE: Session does not need to be updated as the
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// private key has not changed, only the passphrase
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// used to decrypt it has changed
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2012-12-11 17:22:46 +04:00
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}
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}
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2012-07-31 17:03:28 +04:00
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/**
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* @brief update the encryption key of the file uploaded by the client
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2012-08-14 22:06:56 +04:00
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*/
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public static function updateKeyfile( $params ) {
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2012-12-11 17:22:46 +04:00
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if ( Crypt::mode() == 'client' ) {
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if ( isset( $params['properties']['key'] ) ) {
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2013-01-14 23:07:28 +04:00
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$view = new \OC_FilesystemView( '/' );
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$userId = \OCP\User::getUser();
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Keymanager::setFileKey( $view, $params['path'], $userId, $params['properties']['key'] );
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2012-08-14 22:06:56 +04:00
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} else {
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2012-12-11 17:22:46 +04:00
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\OC_Log::write(
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'Encryption library', "Client side encryption is enabled but the client doesn't provide a encryption key for the file!"
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, \OC_Log::ERROR
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);
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}
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2012-08-14 22:06:56 +04:00
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}
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2012-12-11 17:22:46 +04:00
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2012-08-14 22:06:56 +04:00
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}
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2012-12-11 17:22:46 +04:00
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2013-02-12 15:45:54 +04:00
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/**
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2013-01-14 23:07:28 +04:00
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* @brief
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*/
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2013-05-08 18:22:08 +04:00
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public static function preShared( $params ) {
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2013-04-22 13:58:39 +04:00
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2013-02-26 22:33:31 +04:00
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// NOTE: $params has keys:
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// [itemType] => file
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2013-02-09 22:39:32 +04:00
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// itemSource -> int, filecache file ID
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2013-02-26 22:33:31 +04:00
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// [parent] =>
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// [itemTarget] => /13
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2013-02-09 22:39:32 +04:00
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// shareWith -> string, uid of user being shared to
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// fileTarget -> path of file being shared
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// uidOwner -> owner of the original file being shared
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2013-02-26 22:33:31 +04:00
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// [shareType] => 0
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// [shareWith] => test1
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// [uidOwner] => admin
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// [permissions] => 17
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// [fileSource] => 13
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// [fileTarget] => /test8
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// [id] => 10
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2013-04-22 13:58:39 +04:00
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// [token] =>
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2013-05-08 18:22:08 +04:00
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// [run] => whether emitting script should continue to run
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2013-02-26 22:33:31 +04:00
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// TODO: Should other kinds of item be encrypted too?
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2013-05-07 19:16:16 +04:00
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if ( $params['itemType'] === 'file' || $params['itemType'] === 'folder' ) {
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2013-04-22 13:58:39 +04:00
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2013-05-07 19:16:16 +04:00
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$view = new \OC_FilesystemView( '/' );
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2013-04-18 22:00:45 +04:00
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$session = new Session($view);
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2013-02-26 22:33:31 +04:00
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$userId = \OCP\User::getUser();
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2013-04-22 13:58:39 +04:00
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$util = new Util($view, $userId);
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2013-05-07 19:16:16 +04:00
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$path = $util->fileIdToPath( $params['itemSource'] );
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//if parent is set, then this is a re-share action
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if( $params['parent'] ) {
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// get the parent from current share
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$parent = $util->getShareParent( $params['parent'] );
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// if parent is file the it is an 1:1 share
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if($parent['item_type'] === 'file') {
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2013-05-04 05:37:22 +04:00
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2013-05-07 19:16:16 +04:00
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// prefix path with Shared
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$path = '/Shared'.$parent['file_target'];
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} else {
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// NOTE: parent is folder but shared was a file!
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// we try to rebuild the missing path
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// some examples we face here
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// user1 share folder1 with user2 folder1 has
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// the following structure
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// /folder1/subfolder1/subsubfolder1/somefile.txt
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// user2 re-share subfolder2 with user3
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// user3 re-share somefile.txt user4
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// so our path should be
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// /Shared/subfolder1/subsubfolder1/somefile.txt
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// while user3 is sharing
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if ( $params['itemType'] === 'file' ) {
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// get target path
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$targetPath = $util->fileIdToPath( $params['fileSource'] );
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$targetPathSplit = array_reverse( explode( '/', $targetPath ) );
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// init values
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$path = '';
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$sharedPart = ltrim( $parent['file_target'], '/' );
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// rebuild path
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foreach ( $targetPathSplit as $pathPart ) {
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2013-05-08 18:22:08 +04:00
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if ( $pathPart !== $sharedPart ) {
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2013-05-07 19:16:16 +04:00
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$path = '/' . $pathPart . $path;
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} else {
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break;
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}
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}
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// prefix path with Shared
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$path = '/Shared'.$parent['file_target'].$path;
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} else {
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// prefix path with Shared
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$path = '/Shared'.$parent['file_target'].$params['fileTarget'];
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}
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}
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}
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$sharingEnabled = \OCP\Share::isEnabled();
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2013-04-22 13:58:39 +04:00
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2013-04-22 16:13:59 +04:00
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// if a folder was shared, get a list if all (sub-)folders
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2013-05-07 19:16:16 +04:00
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if ( $params['itemType'] === 'folder' ) {
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2013-04-22 13:58:39 +04:00
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$allFiles = $util->getAllFiles($path);
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} else {
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2013-05-07 19:16:16 +04:00
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$allFiles = array( $path );
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2013-04-22 13:58:39 +04:00
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}
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2013-05-07 19:16:16 +04:00
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foreach ( $allFiles as $path ) {
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$usersSharing = $util->getSharingUsersArray( $sharingEnabled, $path );
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2013-04-22 13:58:39 +04:00
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$failed = array();
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2013-03-19 22:53:15 +04:00
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// Attempt to set shareKey
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2013-05-07 19:16:16 +04:00
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if ( !$util->setSharedFileKeyfiles( $session, $usersSharing, $path ) ) {
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2013-04-22 13:58:39 +04:00
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2013-02-26 22:33:31 +04:00
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$failed[] = $path;
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}
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2013-02-20 23:18:00 +04:00
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}
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2013-05-07 19:16:16 +04:00
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2013-05-08 18:22:08 +04:00
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// If some attempts to set keyfiles failed
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if ( ! empty( $failed ) ) {
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2013-05-07 19:16:16 +04:00
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2013-05-08 18:22:08 +04:00
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// Set flag var 'run' to notify emitting
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// script that hook execution failed
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$params['run']->run = false;
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2013-05-07 19:16:16 +04:00
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2013-02-26 22:33:31 +04:00
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}
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2013-02-20 23:18:00 +04:00
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}
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2013-01-14 23:07:28 +04:00
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}
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/**
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* @brief
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*/
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2013-05-07 19:16:16 +04:00
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public static function postUnshare( $params ) {
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2013-05-06 01:41:42 +04:00
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2013-05-07 19:16:16 +04:00
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// NOTE: $params has keys:
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// [itemType] => file
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// [itemSource] => 13
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// [shareType] => 0
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// [shareWith] => test1
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// [itemParent] =>
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2013-05-06 01:41:42 +04:00
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2013-05-07 19:16:16 +04:00
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if ( $params['itemType'] === 'file' || $params['itemType'] === 'folder' ) {
|
2013-05-06 01:41:42 +04:00
|
|
|
|
2013-05-07 19:16:16 +04:00
|
|
|
$view = new \OC_FilesystemView( '/' );
|
|
|
|
$userId = \OCP\User::getUser();
|
|
|
|
$util = new Util( $view, $userId);
|
|
|
|
$path = $util->fileIdToPath( $params['itemSource'] );
|
2013-05-06 01:41:42 +04:00
|
|
|
|
2013-05-07 19:16:16 +04:00
|
|
|
// check if this is a re-share
|
|
|
|
if ( $params['itemParent'] ) {
|
2013-04-22 14:22:07 +04:00
|
|
|
|
2013-05-07 19:16:16 +04:00
|
|
|
// get the parent from current share
|
|
|
|
$parent = $util->getShareParent( $params['itemParent'] );
|
2013-02-26 22:33:31 +04:00
|
|
|
|
2013-05-07 19:16:16 +04:00
|
|
|
// get target path
|
|
|
|
$targetPath = $util->fileIdToPath( $params['itemSource'] );
|
|
|
|
$targetPathSplit = array_reverse( explode( '/', $targetPath ) );
|
2013-02-26 22:33:31 +04:00
|
|
|
|
2013-05-07 19:16:16 +04:00
|
|
|
// init values
|
|
|
|
$path = '';
|
|
|
|
$sharedPart = ltrim( $parent['file_target'], '/' );
|
|
|
|
|
|
|
|
// rebuild path
|
|
|
|
foreach ( $targetPathSplit as $pathPart ) {
|
|
|
|
|
|
|
|
if ( $pathPart !== $sharedPart ) {
|
|
|
|
|
|
|
|
$path = '/' . $pathPart . $path;
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// prefix path with Shared
|
|
|
|
$path = '/Shared' . $parent['file_target'] . $path;
|
|
|
|
}
|
|
|
|
|
|
|
|
// for group shares get a list of the group members
|
|
|
|
if ( $params['shareType'] == \OCP\Share::SHARE_TYPE_GROUP ) {
|
|
|
|
|
|
|
|
$userIds = \OC_Group::usersInGroup($params['shareWith']);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
$userIds = array( $params['shareWith'] );
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// if we unshare a folder we need a list of all (sub-)files
|
|
|
|
if ( $params['itemType'] === 'folder' ) {
|
|
|
|
|
|
|
|
$allFiles = $util->getAllFiles( $path );
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
$allFiles = array( $path );
|
|
|
|
}
|
|
|
|
|
|
|
|
foreach ( $allFiles as $path ) {
|
|
|
|
|
|
|
|
// check if the user still has access to the file, otherwise delete share key
|
|
|
|
$sharingUsers = $util->getSharingUsersArray( true, $path );
|
|
|
|
|
|
|
|
// Unshare every user who no longer has access to the file
|
|
|
|
$delUsers = array_diff( $userIds, $sharingUsers);
|
|
|
|
|
|
|
|
if ( !Keymanager::delShareKey( $view, $delUsers, $path ) ) {
|
|
|
|
|
|
|
|
$failed[] = $path;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
// If no attempts to set keyfiles failed
|
|
|
|
if ( empty( $failed ) ) {
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
|
|
|
} else {
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2013-01-14 23:07:28 +04:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief
|
|
|
|
*/
|
2013-02-13 20:23:27 +04:00
|
|
|
public static function postUnshareAll( $params ) {
|
2013-05-06 01:41:42 +04:00
|
|
|
|
2013-02-27 20:15:03 +04:00
|
|
|
// NOTE: It appears that this is never called for files, so
|
|
|
|
// we may not need to implement it
|
2013-02-13 20:23:27 +04:00
|
|
|
|
2013-01-14 23:07:28 +04:00
|
|
|
}
|
2013-04-27 22:18:05 +04:00
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief after a file is renamed, rename its keyfile and share-keys also fix the file size and fix also the sharing
|
|
|
|
* @param array with oldpath and newpath
|
|
|
|
*
|
|
|
|
* This function is connected to the rename signal of OC_Filesystem and adjust the name and location
|
|
|
|
* of the stored versions along the actual file
|
|
|
|
*/
|
|
|
|
public static function postRename($params) {
|
|
|
|
// Disable encryption proxy to prevent recursive calls
|
|
|
|
$proxyStatus = \OC_FileProxy::$enabled;
|
|
|
|
\OC_FileProxy::$enabled = false;
|
|
|
|
|
|
|
|
$view = new \OC_FilesystemView('/');
|
|
|
|
$session = new Session($view);
|
|
|
|
$userId = \OCP\User::getUser();
|
|
|
|
$util = new Util( $view, $userId );
|
|
|
|
|
|
|
|
// Format paths to be relative to user files dir
|
|
|
|
$oldKeyfilePath = $userId . '/' . 'files_encryption' . '/' . 'keyfiles' . '/' . $params['oldpath'];
|
|
|
|
$newKeyfilePath = $userId . '/' . 'files_encryption' . '/' . 'keyfiles' . '/' . $params['newpath'];
|
|
|
|
|
|
|
|
// add key ext if this is not an folder
|
|
|
|
if (!$view->is_dir($oldKeyfilePath)) {
|
|
|
|
$oldKeyfilePath .= '.key';
|
|
|
|
$newKeyfilePath .= '.key';
|
|
|
|
|
|
|
|
// handle share-keys
|
|
|
|
$localKeyPath = $view->getLocalFile($userId.'/files_encryption/share-keys/'.$params['oldpath']);
|
|
|
|
$matches = glob(preg_quote($localKeyPath).'*.shareKey');
|
|
|
|
foreach ($matches as $src) {
|
|
|
|
$dst = str_replace($params['oldpath'], $params['newpath'], $src);
|
|
|
|
rename($src, $dst);
|
|
|
|
}
|
|
|
|
|
|
|
|
} else {
|
|
|
|
// handle share-keys folders
|
|
|
|
$oldShareKeyfilePath = $userId . '/' . 'files_encryption' . '/' . 'share-keys' . '/' . $params['oldpath'];
|
|
|
|
$newShareKeyfilePath = $userId . '/' . 'files_encryption' . '/' . 'share-keys' . '/' . $params['newpath'];
|
|
|
|
$view->rename($oldShareKeyfilePath, $newShareKeyfilePath);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Rename keyfile so it isn't orphaned
|
|
|
|
if($view->file_exists($oldKeyfilePath)) {
|
|
|
|
$view->rename($oldKeyfilePath, $newKeyfilePath);
|
|
|
|
}
|
|
|
|
|
|
|
|
// build the path to the file
|
|
|
|
$newPath = '/' . $userId . '/files' .$params['newpath'];
|
|
|
|
$newPathRelative = $params['newpath'];
|
|
|
|
|
|
|
|
if($util->fixFileSize($newPath)) {
|
|
|
|
// get sharing app state
|
|
|
|
$sharingEnabled = \OCP\Share::isEnabled();
|
|
|
|
|
|
|
|
// get users
|
|
|
|
$usersSharing = $util->getSharingUsersArray($sharingEnabled, $newPathRelative);
|
|
|
|
|
|
|
|
// update sharing-keys
|
|
|
|
$util->setSharedFileKeyfiles($session, $usersSharing, $newPathRelative);
|
|
|
|
}
|
|
|
|
|
|
|
|
\OC_FileProxy::$enabled = $proxyStatus;
|
|
|
|
}
|
2012-08-14 22:06:56 +04:00
|
|
|
}
|