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fix(dav): Rate limit address book creation
Signed-off-by: Hamza Mahjoubi <[email protected]>
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87 changes: 87 additions & 0 deletions
87
apps/dav/lib/CardDAV/Security/CardDavRateLimitingPlugin.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| /* | ||
| * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
|
||
| namespace OCA\DAV\CardDAV\Security; | ||
|
|
||
| use OC\Security\RateLimiting\Exception\RateLimitExceededException; | ||
| use OC\Security\RateLimiting\Limiter; | ||
| use OCA\DAV\CardDAV\CardDavBackend; | ||
| use OCA\DAV\Connector\Sabre\Exception\TooManyRequests; | ||
| use OCP\IAppConfig; | ||
| use OCP\IUserManager; | ||
| use Psr\Log\LoggerInterface; | ||
| use Sabre\DAV; | ||
| use Sabre\DAV\Exception\Forbidden; | ||
| use Sabre\DAV\ServerPlugin; | ||
| use function count; | ||
| use function explode; | ||
|
|
||
| class CardDavRateLimitingPlugin extends ServerPlugin { | ||
| private ?string $userId; | ||
|
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| public function __construct(private Limiter $limiter, | ||
| private IUserManager $userManager, | ||
| private CardDavBackend $cardDavBackend, | ||
| private LoggerInterface $logger, | ||
| private IAppConfig $config, | ||
| ?string $userId) { | ||
| $this->limiter = $limiter; | ||
| $this->userManager = $userManager; | ||
| $this->cardDavBackend = $cardDavBackend; | ||
| $this->config = $config; | ||
| $this->logger = $logger; | ||
| $this->userId = $userId; | ||
| } | ||
|
|
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| public function initialize(DAV\Server $server): void { | ||
| $server->on('beforeBind', [$this, 'beforeBind'], 1); | ||
| } | ||
|
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| public function beforeBind(string $path): void { | ||
| if ($this->userId === null) { | ||
| // We only care about authenticated users here | ||
| return; | ||
| } | ||
| $user = $this->userManager->get($this->userId); | ||
| if ($user === null) { | ||
| // We only care about authenticated users here | ||
| return; | ||
| } | ||
|
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| $pathParts = explode('/', $path); | ||
| if (count($pathParts) === 4 && $pathParts[0] === 'addressbooks') { | ||
| // Path looks like addressbooks/users/username/addressbooksname so a new addressbook is created | ||
| try { | ||
| $this->limiter->registerUserRequest( | ||
| 'carddav-create-address-book', | ||
| $this->config->getValueInt('dav', 'rateLimitAddressBookCreation', 10), | ||
| $this->config->getValueInt('dav', 'rateLimitPeriodAddressBookCreation', 3600), | ||
| $user | ||
| ); | ||
| } catch (RateLimitExceededException $e) { | ||
| throw new TooManyRequests('Too many addressbooks created', 0, $e); | ||
| } | ||
|
|
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| $addressBookLimit = $this->config->getValueInt('dav', 'maximumAdressbooks', 10); | ||
| if ($addressBookLimit === -1) { | ||
| return; | ||
| } | ||
| $numAddressbooks = $this->cardDavBackend->getAddressBooksForUserCount('principals/users/' . $user->getUID()); | ||
|
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| if ($numAddressbooks >= $addressBookLimit) { | ||
| $this->logger->warning('Maximum number of address books reached', [ | ||
| 'addressbooks' => $numAddressbooks, | ||
| 'addressBookLimit' => $addressBookLimit, | ||
| ]); | ||
| throw new Forbidden('AddressBook limit reached', 0); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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146 changes: 146 additions & 0 deletions
146
apps/dav/tests/unit/CardDAV/Security/CardDavRateLimitingPluginTest.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| /* | ||
| * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
|
||
| namespace OCA\DAV\Tests\unit\CardDAV\Security; | ||
|
|
||
| use OC\Security\RateLimiting\Exception\RateLimitExceededException; | ||
| use OC\Security\RateLimiting\Limiter; | ||
| use OCA\DAV\CardDAV\CardDavBackend; | ||
| use OCA\DAV\CardDAV\Security\CardDavRateLimitingPlugin; | ||
| use OCA\DAV\Connector\Sabre\Exception\TooManyRequests; | ||
| use OCP\IAppConfig; | ||
| use OCP\IUser; | ||
| use OCP\IUserManager; | ||
| use PHPUnit\Framework\MockObject\MockObject; | ||
| use Psr\Log\LoggerInterface; | ||
| use Sabre\DAV\Exception\Forbidden; | ||
| use Test\TestCase; | ||
|
|
||
| class CardDavRateLimitingPluginTest extends TestCase { | ||
|
|
||
| private Limiter|MockObject $limiter; | ||
| private CardDavBackend|MockObject $cardDavBackend; | ||
| private IUserManager|MockObject $userManager; | ||
| private LoggerInterface|MockObject $logger; | ||
| private IAppConfig|MockObject $config; | ||
| private string $userId = 'user123'; | ||
| private CardDavRateLimitingPlugin $plugin; | ||
|
|
||
| protected function setUp(): void { | ||
| parent::setUp(); | ||
|
|
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| $this->limiter = $this->createMock(Limiter::class); | ||
| $this->userManager = $this->createMock(IUserManager::class); | ||
| $this->cardDavBackend = $this->createMock(CardDavBackend::class); | ||
| $this->logger = $this->createMock(LoggerInterface::class); | ||
| $this->config = $this->createMock(IAppConfig::class); | ||
| $this->plugin = new CardDavRateLimitingPlugin( | ||
| $this->limiter, | ||
| $this->userManager, | ||
| $this->cardDavBackend, | ||
| $this->logger, | ||
| $this->config, | ||
| $this->userId, | ||
| ); | ||
| } | ||
|
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| public function testNoUserObject(): void { | ||
| $this->limiter->expects(self::never()) | ||
| ->method('registerUserRequest'); | ||
|
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| $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); | ||
| } | ||
|
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| public function testUnrelated(): void { | ||
| $user = $this->createMock(IUser::class); | ||
| $this->userManager->expects(self::once()) | ||
| ->method('get') | ||
| ->with($this->userId) | ||
| ->willReturn($user); | ||
| $this->limiter->expects(self::never()) | ||
| ->method('registerUserRequest'); | ||
|
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| $this->plugin->beforeBind('foo/bar'); | ||
| } | ||
|
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| public function testRegisterAddressBookrCreation(): void { | ||
| $user = $this->createMock(IUser::class); | ||
| $this->userManager->expects(self::once()) | ||
| ->method('get') | ||
| ->with($this->userId) | ||
| ->willReturn($user); | ||
| $this->config | ||
| ->method('getValueInt') | ||
| ->with('dav') | ||
| ->willReturnArgument(2); | ||
| $this->limiter->expects(self::once()) | ||
| ->method('registerUserRequest') | ||
| ->with( | ||
| 'carddav-create-address-book', | ||
| 10, | ||
| 3600, | ||
| $user, | ||
| ); | ||
|
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| $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); | ||
| } | ||
|
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| public function testAddressBookCreationRateLimitExceeded(): void { | ||
| $user = $this->createMock(IUser::class); | ||
| $this->userManager->expects(self::once()) | ||
| ->method('get') | ||
| ->with($this->userId) | ||
| ->willReturn($user); | ||
| $this->config | ||
| ->method('getValueInt') | ||
| ->with('dav') | ||
| ->willReturnArgument(2); | ||
| $this->limiter->expects(self::once()) | ||
| ->method('registerUserRequest') | ||
| ->with( | ||
| 'carddav-create-address-book', | ||
| 10, | ||
| 3600, | ||
| $user, | ||
| ) | ||
| ->willThrowException(new RateLimitExceededException()); | ||
| $this->expectException(TooManyRequests::class); | ||
|
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| $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); | ||
| } | ||
|
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| public function testAddressBookLimitReached(): void { | ||
| $user = $this->createMock(IUser::class); | ||
| $this->userManager->expects(self::once()) | ||
| ->method('get') | ||
| ->with($this->userId) | ||
| ->willReturn($user); | ||
| $user->method('getUID')->willReturn('user123'); | ||
| $this->config | ||
| ->method('getValueInt') | ||
| ->with('dav') | ||
| ->willReturnArgument(2); | ||
| $this->limiter->expects(self::once()) | ||
| ->method('registerUserRequest') | ||
| ->with( | ||
| 'carddav-create-address-book', | ||
| 10, | ||
| 3600, | ||
| $user, | ||
| ); | ||
| $this->cardDavBackend->expects(self::once()) | ||
| ->method('getAddressBooksForUserCount') | ||
| ->with('principals/users/user123') | ||
| ->willReturn(11); | ||
| $this->expectException(Forbidden::class); | ||
|
|
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| $this->plugin->beforeBind('addressbooks/users/foo/addressbookname'); | ||
| } | ||
|
|
||
| } |