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<?php
/**
* @author Björn Schießle <bjoern@schiessle.org>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Stefan Weil <sw@weilnetz.de>
*
* @copyright Copyright (c) 2016, 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/>
*
*/
$installedVersion = \OC::$server->getConfig()->getAppValue('files', 'installed_version');
$ocVersion = explode('.', \OC::$server->getSystemConfig()->getValue('version'));
/**
* In case encryption was not enabled, we accidentally set encrypted = 1 for
* files inside mount points, since 8.1.0. This breaks opening the files in
* 8.1.1 because we fixed the code that checks if a file is encrypted.
* In order to fix the file, we need to reset the flag of the file. However,
* the flag might be set because the file is in fact encrypted because it was
* uploaded at a time where encryption was enabled.
*
* So we can only do this when:
* - Current version of ownCloud before the update is 8.1.0 or 8.2.0.(0-2)
* - Encryption is disabled
* - files_encryption is not known in the app config
*
* If the first two are not the case, we are save. However, if files_encryption
* values exist in the config, we might have a false negative here.
* Now if there is no file with unencrypted size greater 0, that means there are
* no files that are still encrypted with "files_encryption" encryption. So we
* can also safely reset the flag here.
*
* If this is not the case, we go with "better save then sorry" and don't change
* the flag but write a message to the ownCloud log file.
*/
/**
* @param \OCP\IDBConnection $conn
*/
function owncloud_reset_encrypted_flag(\OCP\IDBConnection $conn) {
$conn->executeUpdate('UPDATE `*PREFIX*filecache` SET `encrypted` = 0 WHERE `encrypted` = 1');
}
// Current version of ownCloud before the update is 8.1.0 or 8.2.0.(0-2)
if ($installedVersion === '1.1.9' && (
// 8.1.0.x
(((int) $ocVersion[0]) === 8 && ((int) $ocVersion[1]) === 1 && ((int) $ocVersion[2]) === 0)
||
// < 8.2.0.3
(((int) $ocVersion[0]) === 8 && ((int) $ocVersion[1]) === 2 && ((int) $ocVersion[2]) === 0 && ((int) $ocVersion[3]) < 3)
)) {
// Encryption is not enabled
if (!\OC::$server->getEncryptionManager()->isEnabled()) {
$conn = \OC::$server->getDatabaseConnection();
// Old encryption is not known in app config
$oldEncryption = \OC::$server->getConfig()->getAppKeys('files_encryption');
if (empty($oldEncryption)) {
owncloud_reset_encrypted_flag($conn);
} else {
$query = $conn->prepare('SELECT * FROM `*PREFIX*filecache` WHERE `encrypted` = 1 AND `unencrypted_size` > 0', 1);
$query->execute();
$empty = $query->fetch();
if (empty($empty)) {
owncloud_reset_encrypted_flag($conn);
} else {
/**
* Sorry in case you are a false positive, but we are not 100% that
* you don't have any encrypted files anymore, so we can not reset
* the value safely
*/
\OC::$server->getLogger()->warning(
'If you have a problem with files not being accessible and '
. 'you are not using encryption, please have a look at the following'
. 'issue: {issue}',
[
'issue' => 'https://github.com/owncloud/core/issues/17846',
]
);
}
}
}
}
|
