<?php
/**
 * ownCloud
 *
 * @author Florin Peter
 * @copyright 2013 Florin Peter <owncloud@florin-peter.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library 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 along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

require_once realpath( dirname( __FILE__ ) . '/../3rdparty/Crypt_Blowfish/Blowfish.php' );
require_once realpath( dirname( __FILE__ ) . '/../../../lib/base.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/crypt.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/keymanager.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/proxy.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/stream.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/util.php' );
require_once realpath( dirname( __FILE__ ) . '/../lib/helper.php' );
require_once realpath( dirname( __FILE__ ) . '/../appinfo/app.php' );

use OCA\Encryption;

/**
 * Class Test_Encryption_Share
 */
class Test_Encryption_Share extends \PHPUnit_Framework_TestCase
{

	public $stateFilesTrashbin;
	public $filename;
	public $dataShort;
	/**
	 * @var OC_FilesystemView
	 */
	public $view;
	public $folder1;
	public $subfolder;
	public $subsubfolder;

	public static function setUpBeforeClass() {
		// reset backend
		\OC_User::clearBackends();
		\OC_User::useBackend( 'database' );

		// enable resharing
		\OC_Appconfig::setValue( 'core', 'shareapi_allow_resharing', 'yes' );

		// clear share hooks
		\OC_Hook::clear( 'OCP\\Share' );
		\OC::registerShareHooks();
		\OCP\Util::connectHook( 'OC_Filesystem', 'setup', '\OC\Files\Storage\Shared', 'setup' );

		// Sharing related hooks
		\OCA\Encryption\Helper::registerShareHooks();

		// Filesystem related hooks
		\OCA\Encryption\Helper::registerFilesystemHooks();

		// clear and register hooks
		\OC_FileProxy::clearProxies();
		\OC_FileProxy::register( new OCA\Encryption\Proxy() );

		// create users
		\Test_Encryption_Share::loginHelper( 'user1', true );
		\Test_Encryption_Share::loginHelper( 'user2', true );
		\Test_Encryption_Share::loginHelper( 'user3', true );

		// create group and assign users
		\OC_Group::createGroup( 'group1' );
		\OC_Group::addToGroup( 'user2', 'group1' );
		\OC_Group::addToGroup( 'user3', 'group1' );
	}

	function setUp() {
		$this->dataShort = 'hats';
		$this->view = new \OC_FilesystemView( '/' );

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

		$this->folder1 = '/folder1';
		$this->subfolder = '/subfolder1';
		$this->subsubfolder = '/subsubfolder1';

		$this->filename = 'share-tmp.test';

		// we don't want to tests with app files_trashbin enabled
		\OC_App::disable( 'files_trashbin' );

		// remember files_trashbin state
		$this->stateFilesTrashbin = OC_App::isEnabled( '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() {
		// clean group
		\OC_Group::deleteGroup( 'group1' );

		// cleanup users
		\OC_User::deleteUser( 'user1' );
		\OC_User::deleteUser( 'user2' );
		\OC_User::deleteUser( 'user3' );
	}

	/**
	 * @param bool $withTeardown
	 */
	function testShareFile( $withTeardown = true ) {
		// login as admin
		$this->loginHelper( 'admin' );

		// save file with content
		$cryptedFile = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

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

		// get the file info from previous created file
		$fileInfo = $this->view->getFileInfo( '/admin/files/' . $this->filename );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfo ) );

		// check if the unencrypted file size is stored
		$this->assertGreaterThan( 0, $fileInfo['unencrypted_size'] );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the file
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user1 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user1.shareKey' ) );

		// login as user1
		$this->loginHelper( 'user1' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user1/files/Shared/' . $this->filename );

		// check if data is the same as we previously written
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// cleanup
		if ( $withTeardown ) {

			// login as admin
			$this->loginHelper( 'admin' );

			// unshare the file
			\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user1.shareKey' ) );

			// cleanup
			$this->view->unlink( '/admin/files/' . $this->filename );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.admin.shareKey' ) );
		}
	}

	/**
	 * @param bool $withTeardown
	 */
	function testReShareFile( $withTeardown = true ) {
		$this->testShareFile( false );

		// login as user1
		$this->loginHelper( 'user1' );

		// get the file info
		$fileInfo = $this->view->getFileInfo( '/user1/files/Shared/' . $this->filename );

		// share the file with user2
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user2', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user2 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );

		// login as user2
		$this->loginHelper( 'user2' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user2/files/Shared/' . $this->filename );

		// check if data is the same as previously written
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// cleanup
		if ( $withTeardown ) {

			// login as user1
			$this->loginHelper( 'user1' );

			// unshare the file with user2
			\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user2' );

			// login as admin
			$this->loginHelper( 'admin' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );

			// unshare the file with user1
			\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user1.shareKey' ) );

			// cleanup
			$this->view->unlink( '/admin/files/' . $this->filename );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.admin.shareKey' ) );
		}
	}

	/**
	 * @param bool $withTeardown
	 * @return array
	 */
	function testShareFolder( $withTeardown = true ) {
		// login as admin
		$this->loginHelper( 'admin' );

		// create folder structure
		$this->view->mkdir( '/admin/files' . $this->folder1 );
		$this->view->mkdir( '/admin/files' . $this->folder1 . $this->subfolder );
		$this->view->mkdir( '/admin/files' . $this->folder1 . $this->subfolder . $this->subsubfolder );

		// save file with content
		$cryptedFile = file_put_contents( 'crypt://' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

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

		// get the file info from previous created folder
		$fileInfo = $this->view->getFileInfo( '/admin/files' . $this->folder1 );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfo ) );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the folder with user1
		\OCP\Share::shareItem( 'folder', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user1 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user1.shareKey' ) );

		// login as user1
		$this->loginHelper( 'user1' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user1/files/Shared' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename );

		// check if data is the same
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// cleanup
		if ( $withTeardown ) {

			// login as admin
			$this->loginHelper( 'admin' );

			// unshare the folder with user1
			\OCP\Share::unshare( 'folder', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user1.shareKey' ) );

			// cleanup
			$this->view->unlink( '/admin/files' . $this->folder1 );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.admin.shareKey' ) );
		}

		return $fileInfo;
	}

	/**
	 * @param bool $withTeardown
	 */
	function testReShareFolder( $withTeardown = true ) {
		$fileInfoFolder1 = $this->testShareFolder( false );

		// login as user1
		$this->loginHelper( 'user1' );

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

		// get the file info from previous created folder
		$fileInfoSubFolder = $this->view->getFileInfo( '/user1/files/Shared' . $this->folder1 . $this->subfolder );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfoSubFolder ) );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the file with user2
		\OCP\Share::shareItem( 'folder', $fileInfoSubFolder['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user2', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user2 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user2.shareKey' ) );

		// login as user2
		$this->loginHelper( 'user2' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user2/files/Shared' . $this->subfolder . $this->subsubfolder . '/' . $this->filename );

		// check if data is the same
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// get the file info
		$fileInfo = $this->view->getFileInfo( '/user2/files/Shared' . $this->subfolder . $this->subsubfolder . '/' . $this->filename );

		// check if we have fileInfos
		$this->assertTrue( is_array( $fileInfo ) );

		// share the file with user3
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user3', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user3 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user3.shareKey' ) );

		// login as user3
		$this->loginHelper( 'user3' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user3/files/Shared/' . $this->filename );

		// check if data is the same
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// cleanup
		if ( $withTeardown ) {

			// login as user2
			$this->loginHelper( 'user2' );

			// unshare the file with user3
			\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user3' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user3.shareKey' ) );

			// login as user1
			$this->loginHelper( 'user1' );

			// unshare the folder with user2
			\OCP\Share::unshare( 'folder', $fileInfoSubFolder['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user2' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user2.shareKey' ) );

			// login as admin
			$this->loginHelper( 'admin' );

			// unshare the folder1 with user1
			\OCP\Share::unshare( 'folder', $fileInfoFolder1['fileid'], \OCP\Share::SHARE_TYPE_USER, 'user1' );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user1.shareKey' ) );

			// cleanup
			$this->view->unlink( '/admin/files' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename );

			// check if share key not exists
			$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.admin.shareKey' ) );
		}
	}

	function testPublicShareFile() {
		// login as admin
		$this->loginHelper( 'admin' );

		// save file with content
		$cryptedFile = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

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

		// get the file info from previous created file
		$fileInfo = $this->view->getFileInfo( '/admin/files/' . $this->filename );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfo ) );

		// check if the unencrypted file size is stored
		$this->assertGreaterThan( 0, $fileInfo['unencrypted_size'] );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the file
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_LINK, false, OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		$publicShareKeyId = \OC_Appconfig::getValue( 'files_encryption', 'publicShareKeyId' );

		// check if share key for public exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $publicShareKeyId . '.shareKey' ) );

		// some hacking to simulate public link
		$GLOBALS['app'] = 'files_sharing';
		$GLOBALS['fileOwner'] = 'admin';
		\OC_User::setUserId( '' );

		// get file contents
		$retrievedCryptedFile = file_get_contents( 'crypt://' . $this->filename );

		// check if data is the same as we previously written
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// tear down

		// login as admin
		$this->loginHelper( 'admin' );

		// unshare the file
		\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_LINK, null );

		// check if share key not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $publicShareKeyId . '.shareKey' ) );

		// cleanup
		$this->view->unlink( '/admin/files/' . $this->filename );

		// check if share key not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.admin.shareKey' ) );
	}

	function testShareFileWithGroup() {
		// login as admin
		$this->loginHelper( 'admin' );

		// save file with content
		$cryptedFile = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

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

		// get the file info from previous created file
		$fileInfo = $this->view->getFileInfo( '/admin/files/' . $this->filename );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfo ) );

		// check if the unencrypted file size is stored
		$this->assertGreaterThan( 0, $fileInfo['unencrypted_size'] );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the file
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_GROUP, 'group1', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user2 and user3 exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user3.shareKey' ) );

		// login as user1
		$this->loginHelper( 'user2' );

		// get file contents
		$retrievedCryptedFile = $this->view->file_get_contents( '/user2/files/Shared/' . $this->filename );

		// check if data is the same as we previously written
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile );

		// login as admin
		$this->loginHelper( 'admin' );

		// unshare the file
		\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_GROUP, 'group1' );

		// check if share key not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user3.shareKey' ) );

		// cleanup
		$this->view->unlink( '/admin/files/' . $this->filename );

		// check if share key not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.admin.shareKey' ) );

	}

	function testRecoveryFile() {
		// login as admin
		$this->loginHelper( 'admin' );

		\OCA\Encryption\Helper::adminEnableRecovery( null, 'test123' );
		$recoveryKeyId = OC_Appconfig::getValue( 'files_encryption', 'recoveryKeyId' );

		// check if control file created
		$this->assertTrue( $this->view->file_exists( '/control-file/controlfile.enc' ) );

		// login as admin
		$this->loginHelper( 'admin' );

		$util = new \OCA\Encryption\Util( new \OC_FilesystemView( '/' ), 'admin' );

		// check if recovery password match
		$this->assertTrue( $util->checkRecoveryPassword( 'test123' ) );

		// enable recovery for admin
		$this->assertTrue( $util->setRecoveryForUser( 1 ) );

		// create folder structure
		$this->view->mkdir( '/admin/files' . $this->folder1 );
		$this->view->mkdir( '/admin/files' . $this->folder1 . $this->subfolder );
		$this->view->mkdir( '/admin/files' . $this->folder1 . $this->subfolder . $this->subsubfolder );

		// save file with content
		$cryptedFile1 = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );
		$cryptedFile2 = file_put_contents( 'crypt://' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile1 ) );
		$this->assertTrue( is_int( $cryptedFile2 ) );

		// check if share key for admin and recovery exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.admin.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.admin.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		// disable recovery for admin
		$this->assertTrue( $util->setRecoveryForUser( 0 ) );

		// remove all recovery keys
		$util->removeRecoveryKeys( '/' );

		// check if share key for recovery not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		// enable recovery for admin
		$this->assertTrue( $util->setRecoveryForUser( 1 ) );

		// remove all recovery keys
		$util->addRecoveryKeys( '/' );

		// check if share key for admin and recovery exists
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		// cleanup
		$this->view->unlink( '/admin/files/' . $this->filename );
		$this->view->unlink( '/admin/files/' . $this->folder1 );

		// check if share key for recovery not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		$this->assertTrue( \OCA\Encryption\Helper::adminEnableRecovery( null, 'test123' ) );
		$this->assertTrue( \OCA\Encryption\Helper::adminDisableRecovery( 'test123' ) );
		$this->assertEquals( 0, \OC_Appconfig::getValue( 'files_encryption', 'recoveryAdminEnabled' ) );
	}

	function testRecoveryForUser() {
		// login as admin
		$this->loginHelper( 'admin' );

		\OCA\Encryption\Helper::adminEnableRecovery( null, 'test123' );
		$recoveryKeyId = OC_Appconfig::getValue( 'files_encryption', 'recoveryKeyId' );

		// check if control file created
		$this->assertTrue( $this->view->file_exists( '/control-file/controlfile.enc' ) );

		// login as user1
		$this->loginHelper( 'user1' );

		$util = new \OCA\Encryption\Util( new \OC_FilesystemView( '/' ), 'user1' );

		// enable recovery for admin
		$this->assertTrue( $util->setRecoveryForUser( 1 ) );

		// create folder structure
		$this->view->mkdir( '/user1/files' . $this->folder1 );
		$this->view->mkdir( '/user1/files' . $this->folder1 . $this->subfolder );
		$this->view->mkdir( '/user1/files' . $this->folder1 . $this->subfolder . $this->subsubfolder );

		// save file with content
		$cryptedFile1 = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );
		$cryptedFile2 = file_put_contents( 'crypt://' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile1 ) );
		$this->assertTrue( is_int( $cryptedFile2 ) );

		// check if share key for user and recovery exists
		$this->assertTrue( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->filename . '.user1.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user1.shareKey' ) );
		$this->assertTrue( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		// login as admin
		$this->loginHelper( 'admin' );

		// change password
		\OC_User::setPassword( 'user1', 'test', 'test123' );

		// login as user1
		$this->loginHelper( 'user1', false, 'test' );

		// get file contents
		$retrievedCryptedFile1 = file_get_contents( 'crypt://' . $this->filename );
		$retrievedCryptedFile2 = file_get_contents( 'crypt://' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename );

		// check if data is the same as we previously written
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile1 );
		$this->assertEquals( $this->dataShort, $retrievedCryptedFile2 );

		// cleanup
		$this->view->unlink( '/user1/files' . $this->folder1 );
		$this->view->unlink( '/user1/files' . $this->filename );

		// check if share key for user and recovery exists
		$this->assertFalse( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->filename . '.user1.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.user1.shareKey' ) );
		$this->assertFalse( $this->view->file_exists( '/user1/files_encryption/share-keys/' . $this->folder1 . $this->subfolder . $this->subsubfolder . '/' . $this->filename . '.' . $recoveryKeyId . '.shareKey' ) );

		// enable recovery for admin
		$this->assertTrue( $util->setRecoveryForUser( 0 ) );

		\OCA\Encryption\Helper::adminDisableRecovery( 'test123' );
		$this->assertEquals( 0, \OC_Appconfig::getValue( 'files_encryption', 'recoveryAdminEnabled' ) );
	}

	function testFailShareFile() {
		// login as admin
		$this->loginHelper( 'admin' );

		// save file with content
		$cryptedFile = file_put_contents( 'crypt://' . $this->filename, $this->dataShort );

		// test that data was successfully written
		$this->assertTrue( is_int( $cryptedFile ) );

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

		// get the file info from previous created file
		$fileInfo = $this->view->getFileInfo( '/admin/files/' . $this->filename );

		// check if we have a valid file info
		$this->assertTrue( is_array( $fileInfo ) );

		// check if the unencrypted file size is stored
		$this->assertGreaterThan( 0, $fileInfo['unencrypted_size'] );

		// break users public key
		$this->view->rename( '/public-keys/user2.public.key', '/public-keys/user2.public.key_backup' );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// share the file
		\OCP\Share::shareItem( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_GROUP, 'group1', OCP\PERMISSION_ALL );

		// login as admin
		$this->loginHelper( 'admin' );

		// check if share key for user1 not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );

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

		// break user1 public key
		$this->view->rename( '/public-keys/user2.public.key_backup', '/public-keys/user2.public.key' );

		// remove share file
		$this->view->unlink( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' );

		// re-enable the file proxy
		\OC_FileProxy::$enabled = $proxyStatus;

		// unshare the file with user1
		\OCP\Share::unshare( 'file', $fileInfo['fileid'], \OCP\Share::SHARE_TYPE_GROUP, 'group1' );

		// check if share key not exists
		$this->assertFalse( $this->view->file_exists( '/admin/files_encryption/share-keys/' . $this->filename . '.user2.shareKey' ) );

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


	/**
	 * @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 );
	}
}