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sources/apps/files_encryption/tests/keymanager.php 20.2 KB
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  <?php
  /**
   * Copyright (c) 2012 Sam Tuke <samtuke@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
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  require_once __DIR__ . '/../../../lib/base.php';
  require_once __DIR__ . '/../lib/crypt.php';
  require_once __DIR__ . '/../lib/keymanager.php';
  require_once __DIR__ . '/../lib/proxy.php';
  require_once __DIR__ . '/../lib/stream.php';
  require_once __DIR__ . '/../lib/util.php';
  require_once __DIR__ . '/../lib/helper.php';
  require_once __DIR__ . '/../appinfo/app.php';
  require_once __DIR__ . '/util.php';
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  use OCA\Encryption;
  
  /**
   * Class Test_Encryption_Keymanager
   */
  class Test_Encryption_Keymanager extends \PHPUnit_Framework_TestCase {
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  	const TEST_USER = "test-keymanager-user";
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  	public $userId;
  	public $pass;
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  	public static $stateFilesTrashbin;
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  	/**
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  	 * @var OC\Files\View
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  	 */
  	public $view;
  	public $randomKey;
  	public $dataShort;
  
  	public static function setUpBeforeClass() {
  		// reset backend
  		\OC_User::clearBackends();
  		\OC_User::useBackend('database');
  
  		// Filesystem related hooks
  		\OCA\Encryption\Helper::registerFilesystemHooks();
  
  		// clear and register hooks
  		\OC_FileProxy::clearProxies();
  		\OC_FileProxy::register(new OCA\Encryption\Proxy());
  
  		// disable file proxy by default
  		\OC_FileProxy::$enabled = false;
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  		// remember files_trashbin state
  		self::$stateFilesTrashbin = OC_App::isEnabled('files_trashbin');
  
  		// we don't want to tests with app files_trashbin enabled
  		\OC_App::disable('files_trashbin');
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  		// create test user
  		\OC_User::deleteUser(\Test_Encryption_Keymanager::TEST_USER);
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Keymanager::TEST_USER, true);
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  	}
  
  	function setUp() {
  		// set content for encrypting / decrypting in tests
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  		$this->dataLong = file_get_contents(__DIR__ . '/../lib/crypt.php');
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  		$this->dataShort = 'hats';
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  		$this->dataUrl = __DIR__ . '/../lib/crypt.php';
  		$this->legacyData = __DIR__ . '/legacy-text.txt';
  		$this->legacyEncryptedData = __DIR__ . '/legacy-encrypted-text.txt';
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  		$this->randomKey = Encryption\Crypt::generateKey();
  
  		$keypair = Encryption\Crypt::createKeypair();
  		$this->genPublicKey = $keypair['publicKey'];
  		$this->genPrivateKey = $keypair['privateKey'];
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  		$this->view = new \OC\Files\View('/');
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  		\Test_Encryption_Util::loginHelper(Test_Encryption_Keymanager::TEST_USER);









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  		$this->userId = \Test_Encryption_Keymanager::TEST_USER;
  		$this->pass = \Test_Encryption_Keymanager::TEST_USER;









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  		$userHome = \OC_User::getHome($this->userId);
  		$this->dataDir = str_replace('/' . $this->userId, '', $userHome);









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  	}
  
  	function tearDown() {









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  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys');
  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles');









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  	}
  
  	public static function tearDownAfterClass() {
  		\OC_FileProxy::$enabled = true;









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  		// cleanup test user
  		\OC_User::deleteUser(\Test_Encryption_Keymanager::TEST_USER);









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  		// reset app files_trashbin
  		if (self::$stateFilesTrashbin) {
  			OC_App::enable('files_trashbin');
  		}









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  	}









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  	/**
  	 * @medium
  	 */









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  	function testGetPrivateKey() {
  
  		$key = Encryption\Keymanager::getPrivateKey($this->view, $this->userId);
  
  		$privateKey = Encryption\Crypt::symmetricDecryptFileContent($key, $this->pass);
  
  		$res = openssl_pkey_get_private($privateKey);
  
  		$this->assertTrue(is_resource($res));
  
  		$sslInfo = openssl_pkey_get_details($res);
  
  		$this->assertArrayHasKey('key', $sslInfo);
  
  	}









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  	/**
  	 * @medium
  	 */









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  	function testGetPublicKey() {
  
  		$publiceKey = Encryption\Keymanager::getPublicKey($this->view, $this->userId);
  
  		$res = openssl_pkey_get_public($publiceKey);
  
  		$this->assertTrue(is_resource($res));
  
  		$sslInfo = openssl_pkey_get_details($res);
  
  		$this->assertArrayHasKey('key', $sslInfo);
  	}









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  	/**









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  	 * @small
  	 */
  	function testGetFilenameFromShareKey() {
  		$this->assertEquals("file",
  				\TestProtectedKeymanagerMethods::testGetFilenameFromShareKey("file.user.shareKey"));
  		$this->assertEquals("file.name.with.dots",
  				\TestProtectedKeymanagerMethods::testGetFilenameFromShareKey("file.name.with.dots.user.shareKey"));
  		$this->assertFalse(\TestProtectedKeymanagerMethods::testGetFilenameFromShareKey("file.txt"));
  	}
  
  	/**









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  	 * @medium
  	 */









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  	function testSetFileKey() {









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  		$key = $this->randomKey;









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  		$file = 'unittest-' . uniqid() . '.txt';









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  		$util = new Encryption\Util($this->view, $this->userId);









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  		// Disable encryption proxy to prevent recursive calls
  		$proxyStatus = \OC_FileProxy::$enabled;
  		\OC_FileProxy::$enabled = false;









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  		$this->view->file_put_contents($this->userId . '/files/' . $file, $this->dataShort);









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  		Encryption\Keymanager::setFileKey($this->view, $util, $file, $key);









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  		$this->assertTrue($this->view->file_exists('/' . $this->userId . '/files_encryption/keyfiles/' . $file . '.key'));









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  		// cleanup
  		$this->view->unlink('/' . $this->userId . '/files/' . $file);
  
  		// change encryption proxy to previous state
  		\OC_FileProxy::$enabled = $proxyStatus;









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  	}









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  	/**
  	 * @medium
  	 */









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  	function testGetUserKeys() {
  
  		$keys = Encryption\Keymanager::getUserKeys($this->view, $this->userId);
  
  		$resPublic = openssl_pkey_get_public($keys['publicKey']);
  
  		$this->assertTrue(is_resource($resPublic));
  
  		$sslInfoPublic = openssl_pkey_get_details($resPublic);
  
  		$this->assertArrayHasKey('key', $sslInfoPublic);
  
  		$privateKey = Encryption\Crypt::symmetricDecryptFileContent($keys['privateKey'], $this->pass);
  
  		$resPrivate = openssl_pkey_get_private($privateKey);
  
  		$this->assertTrue(is_resource($resPrivate));
  
  		$sslInfoPrivate = openssl_pkey_get_details($resPrivate);
  
  		$this->assertArrayHasKey('key', $sslInfoPrivate);
  	}









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  	/**
  	 * @medium
  	 */









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  	function testRecursiveDelShareKeysFolder() {









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  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1/existingFile.txt', 'data');
  
  		// create folder structure for some dummy share key files
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1');
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder');
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder');
  
  		// create some dummy share keys
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file1.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file2.user2.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file2.user3.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/file2.user3.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file1.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file2.user2.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file2.user3.shareKey', 'data');
  
  		// recursive delete share keys from user1 and user2
  		Encryption\Keymanager::delShareKey($this->view, array('user1', 'user2', Test_Encryption_Keymanager::TEST_USER), '/folder1/', Test_Encryption_Keymanager::TEST_USER);
  
  		// check if share keys from user1 and user2 are deleted
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.user1.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file1.user1.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file2.user2.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file1.user1.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file2.user2.shareKey'));
  
  		// check if share keys from user3 still exists
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/file2.user3.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/subsubfolder/file2.user3.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/subfolder/file2.user3.shareKey'));
  
  		// owner key from existing file should still exists because the file is still there
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey'));
  
  		// cleanup
  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  
  	}
  
  	/**
  	 * @medium
  	 */
  	function testRecursiveDelShareKeysFile() {









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  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');









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  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1/existingFile.txt', 'data');









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  		// create folder structure for some dummy share key files
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1');









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  		// create some dummy share keys
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user2.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey', 'data');









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  		// recursive delete share keys from user1 and user2
  		Encryption\Keymanager::delShareKey($this->view, array('user1', 'user2', Test_Encryption_Keymanager::TEST_USER), '/folder1/existingFile.txt', Test_Encryption_Keymanager::TEST_USER);









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  		// check if share keys from user1 and user2 are deleted
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.user1.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.user2.shareKey'));
  
  		// check if share keys for user3 and owner
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey'));
  		// cleanup
  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  
  	}
  
  	/**
  	 * @medium
  	 */
  	function testDeleteFileKey() {
  
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1/existingFile.txt', 'data');
  
  		// create folder structure for some dummy file key files
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1');
  
  		// create dummy keyfile
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/dummyFile.txt.key', 'data');









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  		// recursive delete share keys from user1 and user2
  		$result = Encryption\Keymanager::deleteFileKey($this->view, '/folder1/existingFile.txt');
  		$this->assertFalse($result);









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  		$result2 = Encryption\Keymanager::deleteFileKey($this->view, '/folder1/dummyFile.txt');
  		$this->assertTrue($result2);
  
  		// check if file key from dummyFile was deleted









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  		$this->assertFalse($this->view->file_exists(









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  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/dummyFile.txt.key'));









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  		// check if file key from existing file still exists
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/existingFile.txt.key'));









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  		// cleanup









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  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  
  	}
  
  	/**
  	 * @medium
  	 */
  	function testDeleteFileKeyFolder() {
  
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1/existingFile.txt', 'data');
  
  		// create folder structure for some dummy file key files
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1');
  
  		// create dummy keyfile
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/dummyFile.txt.key', 'data');
  
  		// recursive delete share keys from user1 and user2
  		$result = Encryption\Keymanager::deleteFileKey($this->view, '/folder1');
  		$this->assertFalse($result);
  
  		// all file keys should still exists if we try to delete a folder with keys for which some files still exists
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/dummyFile.txt.key'));
  		$this->assertTrue($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/existingFile.txt.key'));
  
  		// delete folder
  		$this->view->unlink('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  		// create dummy keyfile
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1/dummyFile.txt.key', 'data');
  
  		// now file keys should be deleted since the folder no longer exists
  		$result = Encryption\Keymanager::deleteFileKey($this->view, '/folder1');
  		$this->assertTrue($result);
  
  		$this->assertFalse($this->view->file_exists(
  			'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/keyfiles/folder1'));
  
  		// cleanup
  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  
  	}
  
  	function testDelAllShareKeysFile() {
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1/existingFile.txt', 'data');
  
  		// create folder structure for some dummy share key files
  		$this->view->mkdir('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1');
  
  		// create some dummy share keys for the existing file
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user2.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey', 'data');
  
  		// create some dummy share keys for a non-existing file
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user1.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user2.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user3.shareKey', 'data');
  		$this->view->file_put_contents('/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey', 'data');
  
  		// try to del all share keys from a existing file, should fail because the file still exists
  		$result = Encryption\Keymanager::delAllShareKeys($this->view, Test_Encryption_Keymanager::TEST_USER, 'folder1/existingFile.txt');
  		$this->assertFalse($result);
  
  		// check if share keys still exists
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user1.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user2.shareKey'));
  		$this->assertTrue($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/existingFile.txt.user3.shareKey'));
  
  		// try to del all share keys froma file, should fail because the file still exists
  		$result2 = Encryption\Keymanager::delAllShareKeys($this->view, Test_Encryption_Keymanager::TEST_USER, 'folder1/nonexistingFile.txt');
  		$this->assertTrue($result2);
  
  		// check if share keys are really gone
  		$this->assertFalse($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.' . Test_Encryption_Keymanager::TEST_USER . '.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user1.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user2.shareKey'));
  		$this->assertFalse($this->view->file_exists(
  				'/'.Test_Encryption_Keymanager::TEST_USER.'/files_encryption/share-keys/folder1/nonexistingFile.txt.user3.shareKey'));
  
  		// cleanup
  		$this->view->deleteAll('/'.Test_Encryption_Keymanager::TEST_USER.'/files/folder1');
  
  	}
  
  	function testKeySetPreperation() {
  		$basePath = '/'.Test_Encryption_Keymanager::TEST_USER.'/files';
  		$path = '/folder1/subfolder/subsubfolder/file.txt';
  
  		$this->assertFalse($this->view->is_dir($basePath . '/testKeySetPreperation'));
  
  		$result = TestProtectedKeymanagerMethods::testKeySetPreperation($this->view, $path, $basePath);
  
  		// return path without leading slash
  		$this->assertSame('folder1/subfolder/subsubfolder/file.txt', $result);
  
  		// check if directory structure was created
  		$this->assertTrue($this->view->is_dir($basePath . '/folder1/subfolder/subsubfolder'));
  
  		// cleanup
  		$this->view->deleteAll($basePath . '/folder1');









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  	}
  }









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  /**
   * dummy class to access protected methods of \OCA\Encryption\Keymanager for testing
   */
  class TestProtectedKeymanagerMethods extends \OCA\Encryption\Keymanager {









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  	/**
  	 * @param string $sharekey
  	 */









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  	public static function testGetFilenameFromShareKey($sharekey) {
  		return self::getFilenameFromShareKey($sharekey);
  	}









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  	/**
  	 * @param \OC\Files\View $view relative to data/
  	 * @param string $path
  	 * @param string $basePath
  	 */
  	public static function testKeySetPreperation($view, $path, $basePath) {
  		return self::keySetPreparation($view, $path, $basePath);
  	}
  }