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fix: replace null character when serializing

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Signed-off-by: SebastianKrupinski <krupinskis05@gmail.com>
This commit is contained in:
SebastianKrupinski 2024-11-27 22:16:58 -05:00
parent 10852d38e3
commit c1dd8ddf59
6 changed files with 96 additions and 2 deletions
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8
apps/dav/lib/DAV/CustomPropertiesBackend.php
View file

@ -519,7 +519,9 @@ class CustomPropertiesBackend implements BackendInterface {
$value = $value->getHref();
} else {
$valueType = self::PROPERTY_TYPE_OBJECT;
$value = serialize($value);
// serialize produces null character
// these can not be properly stored in some databases and need to be replaced
$value = str_replace(chr(0), '\x00', serialize($value));
}
return [$value, $valueType];
}
@ -534,7 +536,9 @@ class CustomPropertiesBackend implements BackendInterface {
case self::PROPERTY_TYPE_HREF:
return new Href($value);
case self::PROPERTY_TYPE_OBJECT:
return unserialize($value);
// some databases can not handel null characters, these are custom encoded during serialization
// this custom encoding needs to be first reversed before unserializing
return unserialize(str_replace('\x00', chr(0), $value));
case self::PROPERTY_TYPE_STRING:
default:
return $value;

18
apps/dav/tests/unit/DAV/CustomPropertiesBackendTest.php
View file

@ -1,4 +1,5 @@
<?php
/**
* SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
@ -458,4 +459,21 @@ class CustomPropertiesBackendTest extends TestCase {
[str_repeat('long_path1', 100), str_repeat('long_path2', 100)]
];
}
public function testDecodeValueFromDatabaseObjectCurrent(): void {
$propertyValue = 'O:48:"Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp":1:{s:8:"\x00*\x00value";s:6:"opaque";}';
$propertyType = 3;
$decodeValue = $this->invokePrivate($this->backend, 'decodeValueFromDatabase', [$propertyValue, $propertyType]);
$this->assertInstanceOf(\Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp::class, $decodeValue);
$this->assertEquals('opaque', $decodeValue->getValue());
}
public function testDecodeValueFromDatabaseObjectLegacy(): void {
$propertyValue = 'O:48:"Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp":1:{s:8:"' . chr(0) . '*' . chr(0) . 'value";s:6:"opaque";}';
$propertyType = 3;
$decodeValue = $this->invokePrivate($this->backend, 'decodeValueFromDatabase', [$propertyValue, $propertyType]);
$this->assertInstanceOf(\Sabre\CalDAV\Xml\Property\ScheduleCalendarTransp::class, $decodeValue);
$this->assertEquals('opaque', $decodeValue->getValue());
}
}

1
lib/composer/composer/autoload_classmap.php
View file

@ -1876,6 +1876,7 @@ return array(
'OC\\Repair\\Owncloud\\MoveAvatarsBackgroundJob' => $baseDir . '/lib/private/Repair/Owncloud/MoveAvatarsBackgroundJob.php',
'OC\\Repair\\Owncloud\\SaveAccountsTableData' => $baseDir . '/lib/private/Repair/Owncloud/SaveAccountsTableData.php',
'OC\\Repair\\Owncloud\\UpdateLanguageCodes' => $baseDir . '/lib/private/Repair/Owncloud/UpdateLanguageCodes.php',
'OC\\Repair\\RemoveBrokenProperties' => $baseDir . '/lib/private/Repair/RemoveBrokenProperties.php',
'OC\\Repair\\RemoveLinkShares' => $baseDir . '/lib/private/Repair/RemoveLinkShares.php',
'OC\\Repair\\RepairDavShares' => $baseDir . '/lib/private/Repair/RepairDavShares.php',
'OC\\Repair\\RepairInvalidShares' => $baseDir . '/lib/private/Repair/RepairInvalidShares.php',

1
lib/composer/composer/autoload_static.php
View file

@ -1917,6 +1917,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
'OC\\Repair\\Owncloud\\MoveAvatarsBackgroundJob' => __DIR__ . '/../../..' . '/lib/private/Repair/Owncloud/MoveAvatarsBackgroundJob.php',
'OC\\Repair\\Owncloud\\SaveAccountsTableData' => __DIR__ . '/../../..' . '/lib/private/Repair/Owncloud/SaveAccountsTableData.php',
'OC\\Repair\\Owncloud\\UpdateLanguageCodes' => __DIR__ . '/../../..' . '/lib/private/Repair/Owncloud/UpdateLanguageCodes.php',
'OC\\Repair\\RemoveBrokenProperties' => __DIR__ . '/../../..' . '/lib/private/Repair/RemoveBrokenProperties.php',
'OC\\Repair\\RemoveLinkShares' => __DIR__ . '/../../..' . '/lib/private/Repair/RemoveLinkShares.php',
'OC\\Repair\\RepairDavShares' => __DIR__ . '/../../..' . '/lib/private/Repair/RepairDavShares.php',
'OC\\Repair\\RepairInvalidShares' => __DIR__ . '/../../..' . '/lib/private/Repair/RepairInvalidShares.php',

2
lib/private/Repair.php
View file

@ -50,6 +50,7 @@ use OC\Repair\Owncloud\MigrateOauthTables;
use OC\Repair\Owncloud\MoveAvatars;
use OC\Repair\Owncloud\SaveAccountsTableData;
use OC\Repair\Owncloud\UpdateLanguageCodes;
use OC\Repair\RemoveBrokenProperties;
use OC\Repair\RemoveLinkShares;
use OC\Repair\RepairDavShares;
use OC\Repair\RepairInvalidShares;
@ -206,6 +207,7 @@ class Repair implements IOutput {
public static function getExpensiveRepairSteps() {
return [
new OldGroupMembershipShares(\OC::$server->getDatabaseConnection(), \OC::$server->getGroupManager()),
new RemoveBrokenProperties(\OCP\Server::get(IDBConnection::class)),
new RepairMimeTypes(
\OCP\Server::get(IConfig::class),
\OCP\Server::get(IAppConfig::class),

68
lib/private/Repair/RemoveBrokenProperties.php Normal file
View file

@ -0,0 +1,68 @@
<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\Repair;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\IRepairStep;
class RemoveBrokenProperties implements IRepairStep {
/**
* RemoveBrokenProperties constructor.
*
* @param IDBConnection $db
*/
public function __construct(
private IDBConnection $db,
) {
}
/**
* @inheritdoc
*/
public function getName() {
return 'Remove broken DAV object properties';
}
/**
* @inheritdoc
*/
public function run(IOutput $output) {
// retrieve all object properties
$qb = $this->db->getQueryBuilder();
$qb->select('id', 'propertyvalue')
->from('properties')
->where($qb->expr()->eq('valuetype', $qb->createNamedParameter('3', IQueryBuilder::PARAM_INT), IQueryBuilder::PARAM_INT));
$result = $qb->executeQuery();
// find broken object properties
$brokenIds = [];
while ($entry = $result->fetch()) {
if (!empty($entry['propertyvalue'])) {
$object = @unserialize(str_replace('\x00', chr(0), $entry['propertyvalue']));
if ($object === false) {
$brokenIds[] = $entry['id'];
}
} else {
$brokenIds[] = $entry['id'];
}
}
$result->closeCursor();
// delete broken object properties
$qb = $this->db->getQueryBuilder();
$qb->delete('properties')
->where($qb->expr()->in('id', $qb->createParameter('ids'), IQueryBuilder::PARAM_STR_ARRAY));
foreach (array_chunk($brokenIds, 1000) as $chunkIds) {
$qb->setParameter('ids', $chunkIds, IQueryBuilder::PARAM_STR_ARRAY);
$qb->executeStatement();
}
$total = count($brokenIds);
$output->info("$total broken object properties removed");
}
}