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sources/apps/files_encryption/tests/util.php 18.2 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__ . '/../appinfo/app.php';
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  use OCA\Encryption;
  
  /**
   * Class Test_Encryption_Util
   */
  class Test_Encryption_Util extends \PHPUnit_Framework_TestCase {
  
  	const TEST_ENCRYPTION_UTIL_USER1 = "test-util-user1";
  	const TEST_ENCRYPTION_UTIL_LEGACY_USER = "test-legacy-user";
  
  	public $userId;
  	public $encryptionDir;
  	public $publicKeyDir;
  	public $pass;
  	/**
  	 * @var OC_FilesystemView
  	 */
  	public $view;
  	public $keyfilesPath;
  	public $publicKeyPath;
  	public $privateKeyPath;
  	/**
  	 * @var \OCA\Encryption\Util
  	 */
  	public $util;
  	public $dataShort;
  	public $legacyEncryptedData;
  	public $legacyEncryptedDataKey;
  	public $legacyKey;
  	public $stateFilesTrashbin;
  
  	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());
  
  		// create test user
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1, true);
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER, true);
  	}
  
  
  	function setUp() {
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  		// login user
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
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  		\OC_User::setUserId(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
  		$this->userId = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1;
  		$this->pass = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1;
  
  		// set content for encrypting / decrypting in tests
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  		$this->dataUrl = __DIR__ . '/../lib/crypt.php';
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  		$this->dataShort = 'hats';
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  		$this->dataLong = file_get_contents(__DIR__ . '/../lib/crypt.php');
  		$this->legacyData = __DIR__ . '/legacy-text.txt';
  		$this->legacyEncryptedData = __DIR__ . '/legacy-encrypted-text.txt';
  		$this->legacyEncryptedDataKey = __DIR__ . '/encryption.key';
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  		$this->legacyKey = "30943623843030686906\0\0\0\0";
  
  		$keypair = Encryption\Crypt::createKeypair();
  
  		$this->genPublicKey = $keypair['publicKey'];
  		$this->genPrivateKey = $keypair['privateKey'];
  
  		$this->publicKeyDir = '/' . 'public-keys';
  		$this->encryptionDir = '/' . $this->userId . '/' . 'files_encryption';
  		$this->keyfilesPath = $this->encryptionDir . '/' . 'keyfiles';
  		$this->publicKeyPath =
  			$this->publicKeyDir . '/' . $this->userId . '.public.key'; // e.g. data/public-keys/admin.public.key
  		$this->privateKeyPath =
  			$this->encryptionDir . '/' . $this->userId . '.private.key'; // e.g. data/admin/admin.private.key
  
  		$this->view = new \OC_FilesystemView('/');
  
  		$this->util = new Encryption\Util($this->view, $this->userId);
  
  		// remember files_trashbin state
  		$this->stateFilesTrashbin = OC_App::isEnabled('files_trashbin');
  
  		// we don't want to tests with app files_trashbin enabled
  		\OC_App::disable('files_trashbin');
  	}
  
  	function tearDown() {
  		// reset app files_trashbin
  		if ($this->stateFilesTrashbin) {
  			OC_App::enable('files_trashbin');
  		}
  		else {
  			OC_App::disable('files_trashbin');
  		}
  	}
  
  	public static function tearDownAfterClass() {
  		// cleanup test user
  		\OC_User::deleteUser(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
  		\OC_User::deleteUser(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  	}
  
  	/**
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  	 * @medium
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  	 * @brief test that paths set during User construction are correct
  	 */
  	function testKeyPaths() {
  		$util = new Encryption\Util($this->view, $this->userId);
  
  		$this->assertEquals($this->publicKeyDir, $util->getPath('publicKeyDir'));
  		$this->assertEquals($this->encryptionDir, $util->getPath('encryptionDir'));
  		$this->assertEquals($this->keyfilesPath, $util->getPath('keyfilesPath'));
  		$this->assertEquals($this->publicKeyPath, $util->getPath('publicKeyPath'));
  		$this->assertEquals($this->privateKeyPath, $util->getPath('privateKeyPath'));
  
  	}
  
  	/**
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  	 * @medium
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  	 * @brief test detection of encrypted files
  	 */
  	function testIsEncryptedPath() {
  
  		$util = new Encryption\Util($this->view, $this->userId);
  
  		self::loginHelper($this->userId);
  
  		$unencryptedFile = '/tmpUnencrypted-' . time() . '.txt';
  		$encryptedFile =  '/tmpEncrypted-' . time() . '.txt';
  
  		// Disable encryption proxy to write a unencrypted file
  		$proxyStatus = \OC_FileProxy::$enabled;
  		\OC_FileProxy::$enabled = false;
  
  		$this->view->file_put_contents($this->userId . '/files/' . $unencryptedFile, $this->dataShort);
  
  		// Re-enable proxy - our work is done
  		\OC_FileProxy::$enabled = $proxyStatus;
  
  		// write a encrypted file
  		$this->view->file_put_contents($this->userId . '/files/' . $encryptedFile, $this->dataShort);
  
  		// test if both files are detected correctly
  		$this->assertFalse($util->isEncryptedPath($this->userId . '/files/' . $unencryptedFile));
  		$this->assertTrue($util->isEncryptedPath($this->userId . '/files/' . $encryptedFile));
  
  		// cleanup
  		$this->view->unlink($this->userId . '/files/' . $unencryptedFile, $this->dataShort);
  		$this->view->unlink($this->userId . '/files/' . $encryptedFile, $this->dataShort);
  
  	}
  
  	/**
  	 * @medium
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  	 * @brief test setup of encryption directories
  	 */
  	function testSetupServerSide() {
  		$this->assertEquals(true, $this->util->setupServerSide($this->pass));
  	}
  
  	/**
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  	 * @medium
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  	 * @brief test checking whether account is ready for encryption,
  	 */
  	function testUserIsReady() {
  		$this->assertEquals(true, $this->util->ready());
  	}
  
  	/**
  	 * @brief test checking whether account is not ready for encryption,
  	 */
  //	function testUserIsNotReady() {
  //		$this->view->unlink($this->publicKeyDir);
  //
  //		$params['uid'] = $this->userId;
  //		$params['password'] = $this->pass;
  //		$this->assertFalse(OCA\Encryption\Hooks::login($params));
  //
  //		$this->view->unlink($this->privateKeyPath);
  //	}
  
  	/**
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  	 * @medium
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  	 * @brief test checking whether account is not ready for encryption,
  	 */
  	function testIsLegacyUser() {
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  
  		$userView = new \OC_FilesystemView('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  
  		// Disable encryption proxy to prevent recursive calls
  		$proxyStatus = \OC_FileProxy::$enabled;
  		\OC_FileProxy::$enabled = false;
  
  		$encryptionKeyContent = file_get_contents($this->legacyEncryptedDataKey);
  		$userView->file_put_contents('/encryption.key', $encryptionKeyContent);
  
  		\OC_FileProxy::$enabled = $proxyStatus;
  
  		$params['uid'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
  		$params['password'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
  
  		$this->setMigrationStatus(0, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  
  		$this->assertTrue(OCA\Encryption\Hooks::login($params));
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  		$this->assertEquals($this->legacyKey, \OC::$session->get('legacyKey'));
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  	}
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  	/**
  	 * @medium
  	 */
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  	function testRecoveryEnabledForUser() {
  
  		$util = new Encryption\Util($this->view, $this->userId);
  
  		// Record the value so we can return it to it's original state later
  		$enabled = $util->recoveryEnabledForUser();
  
  		$this->assertTrue($util->setRecoveryForUser(1));
  
  		$this->assertEquals(1, $util->recoveryEnabledForUser());
  
  		$this->assertTrue($util->setRecoveryForUser(0));
  
  		$this->assertEquals(0, $util->recoveryEnabledForUser());
  
  		// Return the setting to it's previous state
  		$this->assertTrue($util->setRecoveryForUser($enabled));
  
  	}
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  	/**
  	 * @medium
  	 */
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  	function testGetUidAndFilename() {
  
  		\OC_User::setUserId(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
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  		$filename = '/tmp-' . uniqid() . '.test';
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  		// Disable encryption proxy to prevent recursive calls
  		$proxyStatus = \OC_FileProxy::$enabled;
  		\OC_FileProxy::$enabled = false;
  
  		$this->view->file_put_contents($this->userId . '/files/' . $filename, $this->dataShort);
  
  		// Re-enable proxy - our work is done
  		\OC_FileProxy::$enabled = $proxyStatus;
  
  		$util = new Encryption\Util($this->view, $this->userId);
  
  		list($fileOwnerUid, $file) = $util->getUidAndFilename($filename);
  
  		$this->assertEquals(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1, $fileOwnerUid);
  
  		$this->assertEquals($file, $filename);
  
  		$this->view->unlink($this->userId . '/files/' . $filename);
  	}
  
  	/**
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  <	 * @brief Test that data that is read by the crypto stream wrapper
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  	 */
  	function testGetFileSize() {
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
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  		$filename = 'tmp-' . uniqid();
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  		$externalFilename = '/' . $this->userId . '/files/' . $filename;
  
  		// Test for 0 byte files
  		$problematicFileSizeData = "";
  		$cryptedFile = $this->view->file_put_contents($externalFilename, $problematicFileSizeData);
  		$this->assertTrue(is_int($cryptedFile));
  		$this->assertEquals($this->util->getFileSize($externalFilename), 0);
  		$decrypt = $this->view->file_get_contents($externalFilename);
  		$this->assertEquals($problematicFileSizeData, $decrypt);
  		$this->view->unlink($this->userId . '/files/' . $filename);
  
  		// Test a file with 18377 bytes as in https://github.com/owncloud/mirall/issues/1009
  		$problematicFileSizeData = str_pad("", 18377, "abc");
  		$cryptedFile = $this->view->file_put_contents($externalFilename, $problematicFileSizeData);
  		$this->assertTrue(is_int($cryptedFile));
  		$this->assertEquals($this->util->getFileSize($externalFilename), 18377);
  		$decrypt = $this->view->file_get_contents($externalFilename);
  		$this->assertEquals($problematicFileSizeData, $decrypt);
  		$this->view->unlink($this->userId . '/files/' . $filename);
  	}
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  	/**
  	 * @medium
  	 */
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  	function testIsSharedPath() {
  		$sharedPath = '/user1/files/Shared/test';
  		$path = '/user1/files/test';
  
  		$this->assertTrue($this->util->isSharedPath($sharedPath));
  
  		$this->assertFalse($this->util->isSharedPath($path));
  	}
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  	function testEncryptAll() {
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  		$filename = "/encryptAll" . uniqid() . ".txt";
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  		$util = new Encryption\Util($this->view, $this->userId);
  
  		// disable encryption to upload a unencrypted file
  		\OC_App::disable('files_encryption');
  
  		$this->view->file_put_contents($this->userId . '/files/' . $filename, $this->dataShort);
  
  		$fileInfoUnencrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
  
  		$this->assertTrue(is_array($fileInfoUnencrypted));
  
  		// enable file encryption again
  		\OC_App::enable('files_encryption');
  
  		// encrypt all unencrypted files
  		$util->encryptAll('/' . $this->userId . '/' . 'files');
  
  		$fileInfoEncrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
  
  		$this->assertTrue(is_array($fileInfoEncrypted));
  
  		// check if mtime and etags unchanged
  		$this->assertEquals($fileInfoEncrypted['mtime'], $fileInfoUnencrypted['mtime']);
  		$this->assertEquals($fileInfoEncrypted['etag'], $fileInfoUnencrypted['etag']);
  
  		$this->view->unlink($this->userId . '/files/' . $filename);
  	}
  
  
  	function testDecryptAll() {
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  		$filename = "/decryptAll" . uniqid() . ".txt";
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  		$util = new Encryption\Util($this->view, $this->userId);
  
  		$this->view->file_put_contents($this->userId . '/files/' . $filename, $this->dataShort);
  
  		$fileInfoEncrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
  
  		$this->assertTrue(is_array($fileInfoEncrypted));
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  		$this->assertEquals($fileInfoEncrypted['encrypted'], 1);
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  		// decrypt all encrypted files
  		$result = $util->decryptAll('/' . $this->userId . '/' . 'files');
  
  		$this->assertTrue($result);









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  		$fileInfoUnencrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
  
  		$this->assertTrue(is_array($fileInfoUnencrypted));
  
  		// check if mtime and etags unchanged
  		$this->assertEquals($fileInfoEncrypted['mtime'], $fileInfoUnencrypted['mtime']);
  		$this->assertEquals($fileInfoEncrypted['etag'], $fileInfoUnencrypted['etag']);









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  		// file should no longer be encrypted
  		$this->assertEquals(0, $fileInfoUnencrypted['encrypted']);









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  		$this->view->unlink($this->userId . '/files/' . $filename);
  
  	}









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  	function testDescryptAllWithBrokenFiles() {
  
  		$file1 = "/decryptAll1" . uniqid() . ".txt";
  		$file2 = "/decryptAll2" . uniqid() . ".txt";
  
  		$util = new Encryption\Util($this->view, $this->userId);
  
  		$this->view->file_put_contents($this->userId . '/files/' . $file1, $this->dataShort);
  		$this->view->file_put_contents($this->userId . '/files/' . $file2, $this->dataShort);
  
  		$fileInfoEncrypted1 = $this->view->getFileInfo($this->userId . '/files/' . $file1);
  		$fileInfoEncrypted2 = $this->view->getFileInfo($this->userId . '/files/' . $file2);
  
  		$this->assertTrue(is_array($fileInfoEncrypted1));
  		$this->assertTrue(is_array($fileInfoEncrypted2));
  		$this->assertEquals($fileInfoEncrypted1['encrypted'], 1);
  		$this->assertEquals($fileInfoEncrypted2['encrypted'], 1);
  
  		// rename keyfile for file1 so that the decryption for file1 fails
  		// Expected behaviour: decryptAll() returns false, file2 gets decrypted anyway
  		$this->view->rename($this->userId . '/files_encryption/keyfiles/' . $file1 . '.key',
  				$this->userId . '/files_encryption/keyfiles/' . $file1 . '.key.moved');
  
  		// decrypt all encrypted files
  		$result = $util->decryptAll('/' . $this->userId . '/' . 'files');
  
  		$this->assertFalse($result);
  
  		$fileInfoUnencrypted1 = $this->view->getFileInfo($this->userId . '/files/' . $file1);
  		$fileInfoUnencrypted2 = $this->view->getFileInfo($this->userId . '/files/' . $file2);
  
  		$this->assertTrue(is_array($fileInfoUnencrypted1));
  		$this->assertTrue(is_array($fileInfoUnencrypted2));
  
  		// file1 should be still encrypted; file2 should be decrypted
  		$this->assertEquals(1, $fileInfoUnencrypted1['encrypted']);
  		$this->assertEquals(0, $fileInfoUnencrypted2['encrypted']);
  
  		// keyfiles and share keys should still exist
  		$this->assertTrue($this->view->is_dir($this->userId . '/files_encryption/keyfiles/'));
  		$this->assertTrue($this->view->is_dir($this->userId . '/files_encryption/share-keys/'));
  
  		// rename the keyfile for file1 back
  		$this->view->rename($this->userId . '/files_encryption/keyfiles/' . $file1 . '.key.moved',
  				$this->userId . '/files_encryption/keyfiles/' . $file1 . '.key');
  
  		// try again to decrypt all encrypted files
  		$result = $util->decryptAll('/' . $this->userId . '/' . 'files');
  
  		$this->assertTrue($result);
  
  		$fileInfoUnencrypted1 = $this->view->getFileInfo($this->userId . '/files/' . $file1);
  		$fileInfoUnencrypted2 = $this->view->getFileInfo($this->userId . '/files/' . $file2);
  
  		$this->assertTrue(is_array($fileInfoUnencrypted1));
  		$this->assertTrue(is_array($fileInfoUnencrypted2));
  
  		// now both files should be decrypted
  		$this->assertEquals(0, $fileInfoUnencrypted1['encrypted']);
  		$this->assertEquals(0, $fileInfoUnencrypted2['encrypted']);
  
  		// keyfiles and share keys should be deleted
  		$this->assertFalse($this->view->is_dir($this->userId . '/files_encryption/keyfiles/'));
  		$this->assertFalse($this->view->is_dir($this->userId . '/files_encryption/share-keys/'));
  
  		$this->view->unlink($this->userId . '/files/' . $file1);
  		$this->view->unlink($this->userId . '/files/' . $file2);
  
  	}









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  	/**
  	 * @large
  	 */









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  	function testEncryptLegacyFiles() {
  		\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  
  		$userView = new \OC_FilesystemView('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  		$view = new \OC_FilesystemView('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER . '/files');
  
  		// Disable encryption proxy to prevent recursive calls
  		$proxyStatus = \OC_FileProxy::$enabled;
  		\OC_FileProxy::$enabled = false;
  
  		$encryptionKeyContent = file_get_contents($this->legacyEncryptedDataKey);
  		$userView->file_put_contents('/encryption.key', $encryptionKeyContent);
  
  		$legacyEncryptedData = file_get_contents($this->legacyEncryptedData);
  		$view->mkdir('/test/');
  		$view->mkdir('/test/subtest/');
  		$view->file_put_contents('/test/subtest/legacy-encrypted-text.txt', $legacyEncryptedData);
  
  		$fileInfo = $view->getFileInfo('/test/subtest/legacy-encrypted-text.txt');
  		$fileInfo['encrypted'] = true;
  		$view->putFileInfo('/test/subtest/legacy-encrypted-text.txt', $fileInfo);
  
  		\OC_FileProxy::$enabled = $proxyStatus;
  
  		$params['uid'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
  		$params['password'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
  
  		$util = new Encryption\Util($this->view, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  		$this->setMigrationStatus(0, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
  
  		$this->assertTrue(OCA\Encryption\Hooks::login($params));









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  		$this->assertEquals($this->legacyKey, \OC::$session->get('legacyKey'));









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  		$files = $util->findEncFiles('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER . '/files/');
  
  		$this->assertTrue(is_array($files));
  
  		$found = false;
  		foreach ($files['encrypted'] as $encryptedFile) {
  			if ($encryptedFile['name'] === 'legacy-encrypted-text.txt') {
  				$found = true;
  				break;
  			}
  		}
  
  		$this->assertTrue($found);
  	}
  
  	/**
  	 * @param $user
  	 * @param bool $create
  	 * @param bool $password
  	 */
  	public static function loginHelper($user, $create = false, $password = false) {
  		if ($create) {
  			\OC_User::createUser($user, $user);
  		}
  
  		if ($password === false) {
  			$password = $user;
  		}
  
  		\OC_Util::tearDownFS();
  		\OC_User::setUserId('');
  		\OC\Files\Filesystem::tearDown();
  		\OC_Util::setupFS($user);
  		\OC_User::setUserId($user);
  
  		$params['uid'] = $user;
  		$params['password'] = $password;
  		OCA\Encryption\Hooks::login($params);
  	}









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  	public static function logoutHelper() {
  		\OC_Util::tearDownFS();
  		\OC_User::setUserId('');
  		\OC\Files\Filesystem::tearDown();
  	}









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  	/**
  	 * helper function to set migration status to the right value
  	 * to be able to test the migration path









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  	 *









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  	 * @param $status needed migration status for test
  	 * @param $user for which user the status should be set
  	 * @return boolean
  	 */
  	private function setMigrationStatus($status, $user) {
  		$sql = 'UPDATE `*PREFIX*encryption` SET `migration_status` = ? WHERE `uid` = ?';
  		$args = array(
  			$status,
  			$user
  		);
  
  		$query = \OCP\DB::prepare($sql);
  		if ($query->execute($args)) {
  			return true;
  		} else {
  			return false;
  		}
  	}
  
  }