nextcloud/apps/files_encryption/tests/util.php

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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.
*/
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';
use OCA\Encryption;
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/**
* 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";
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public $userId;
public $encryptionDir;
public $publicKeyDir;
public $pass;
/**
* @var OC\Files\View
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*/
public $view;
public $keyfilesPath;
public $publicKeyPath;
public $privateKeyPath;
/**
* @var \OCA\Encryption\Util
*/
public $util;
public $dataShort;
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public $legacyEncryptedData;
public $legacyEncryptedDataKey;
public $legacyKey;
public $stateFilesTrashbin;
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public static function setUpBeforeClass() {
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// 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);
\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;
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// set content for encrypting / decrypting in tests
$this->dataUrl = __DIR__ . '/../lib/crypt.php';
$this->dataShort = 'hats';
$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";
$keypair = Encryption\Crypt::createKeypair();
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$this->genPublicKey = $keypair['publicKey'];
$this->genPrivateKey = $keypair['privateKey'];
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$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\Files\View('/');
$this->util = new Encryption\Util($this->view, $this->userId);
// remember files_trashbin state
$this->stateFilesTrashbin = OC_App::isEnabled('files_trashbin');
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// we don't want to tests with app files_trashbin enabled
\OC_App::disable('files_trashbin');
}
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function tearDown() {
// reset app files_trashbin
if ($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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/**
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* @medium
* test that paths set during User construction are correct
*/
function testKeyPaths() {
$util = new Encryption\Util($this->view, $this->userId);
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$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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}
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/**
* @medium
* test detection of encrypted files
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*/
function testIsEncryptedPath() {
$util = new Encryption\Util($this->view, $this->userId);
self::loginHelper($this->userId);
$unencryptedFile = '/tmpUnencrypted-' . uniqid() . '.txt';
$encryptedFile = '/tmpEncrypted-' . uniqid() . '.txt';
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// 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);
}
/**
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* @medium
* test setup of encryption directories
*/
function testSetupServerSide() {
$this->assertEquals(true, $this->util->setupServerSide($this->pass));
}
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/**
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* @medium
* test checking whether account is ready for encryption,
*/
function testUserIsReady() {
$this->assertEquals(true, $this->util->ready());
}
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/**
* test checking whether account is not ready for encryption,
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*/
// 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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/**
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* @medium
* test checking whether account is not ready for encryption,
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*/
function testIsLegacyUser() {
\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
$userView = new \OC\Files\View('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
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// 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', $encryptionKeyContent);
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\OC_FileProxy::$enabled = $proxyStatus;
$params['uid'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
$params['password'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
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$this->setMigrationStatus(0, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
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$this->assertTrue(OCA\Encryption\Hooks::login($params));
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$this->assertEquals($this->legacyKey, \OC::$session->get('legacyKey'));
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}
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/**
* @medium
*/
function testRecoveryEnabledForUser() {
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$util = new Encryption\Util($this->view, $this->userId);
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// Record the value so we can return it to it's original state later
$enabled = $util->recoveryEnabledForUser();
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$this->assertTrue($util->setRecoveryForUser(!$enabled));
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$this->assertEquals(!$enabled, $util->recoveryEnabledForUser());
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$this->assertTrue($util->setRecoveryForUser($enabled));
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$this->assertEquals($enabled, $util->recoveryEnabledForUser());
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}
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/**
* @medium
*/
function testGetUidAndFilename() {
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\OC_User::setUserId(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
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$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, $this->dataShort);
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// Re-enable proxy - our work is done
\OC_FileProxy::$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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/**
< * Test that data that is read by the crypto stream wrapper
*/
function testGetFileSize() {
\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
$filename = 'tmp-' . uniqid();
$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);
}
function testEncryptAll() {
$filename = "/encryptAll" . uniqid() . ".txt";
$util = new Encryption\Util($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/' . $filename);
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$this->assertTrue($fileInfoUnencrypted instanceof \OC\Files\FileInfo);
// 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/' . $filename);
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$this->assertTrue($fileInfoEncrypted instanceof \OC\Files\FileInfo);
// check if mtime and etags unchanged
$this->assertEquals($fileInfoEncrypted['mtime'], $fileInfoUnencrypted['mtime']);
$this->assertSame($fileInfoEncrypted['etag'], $fileInfoUnencrypted['etag']);
$this->view->unlink($this->userId . '/files/' . $filename);
}
function testDecryptAll() {
$filename = "/decryptAll" . uniqid() . ".txt";
$datadir = \OC_Config::getValue('datadirectory', \OC::$SERVERROOT . '/data/');
$userdir = $datadir . '/' . $this->userId . '/files/';
$util = new Encryption\Util($this->view, $this->userId);
$this->view->file_put_contents($this->userId . '/files/' . $filename, $this->dataShort);
$fileInfoEncrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
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$this->assertTrue($fileInfoEncrypted instanceof \OC\Files\FileInfo);
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$this->assertEquals($fileInfoEncrypted['encrypted'], 1);
$encContent = file_get_contents($userdir . $filename);
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\OC_App::disable('files_encryption');
$user = \OCP\User::getUser();
$this->logoutHelper();
$this->loginHelper($user, false, false, false);
$content = file_get_contents($userdir . $filename);
//content should be encrypted
$this->assertSame($encContent, $content);
// now we load the encryption app again
OC_App::loadApp('files_encryption');
// init encryption app
$params = array('uid' => \OCP\User::getUser(),
'password' => \OCP\User::getUser());
$view = new OC\Files\View('/');
$util = new \OCA\Encryption\Util($view, \OCP\User::getUser());
$result = $util->initEncryption($params);
$this->assertTrue($result instanceof \OCA\Encryption\Session);
$successful = $util->decryptAll();
$this->assertTrue($successful);
$this->logoutHelper();
$this->loginHelper($user, false, false, false);
// file should be unencrypted and fileInfo should contain the correct values
$content = file_get_contents($userdir . $filename);
// now we should get the plain data
$this->assertSame($this->dataShort, $content);
$fileInfoUnencrypted = $this->view->getFileInfo($this->userId . '/files/' . $filename);
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$this->assertTrue($fileInfoUnencrypted instanceof \OC\Files\FileInfo);
// check if mtime and etags unchanged
$this->assertEquals($fileInfoEncrypted['mtime'], $fileInfoUnencrypted['mtime']);
$this->assertSame($fileInfoEncrypted['etag'], $fileInfoUnencrypted['etag']);
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// file should no longer be encrypted
$this->assertEquals(0, $fileInfoUnencrypted['encrypted']);
// check if the keys where moved to the backup location
$this->assertTrue($this->view->is_dir($this->userId . '/files_encryption/keyfiles.backup'));
$this->assertTrue($this->view->file_exists($this->userId . '/files_encryption/keyfiles.backup/' . $filename . '.key'));
$this->assertTrue($this->view->is_dir($this->userId . '/files_encryption/share-keys.backup'));
$this->assertTrue($this->view->file_exists($this->userId . '/files_encryption/share-keys.backup/' . $filename . '.' . $user . '.shareKey'));
// cleanup
$this->view->unlink($this->userId . '/files/' . $filename);
$this->view->deleteAll($this->userId . '/files_encryption/keyfiles.backup');
$this->view->deleteAll($this->userId . '/files_encryption/share-keys.backup');
OC_App::enable('files_encryption');
}
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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);
$this->assertTrue($fileInfoEncrypted1 instanceof \OC\Files\FileInfo);
$this->assertTrue($fileInfoEncrypted2 instanceof \OC\Files\FileInfo);
$this->assertEquals($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);
$this->assertTrue($fileInfoUnencrypted1 instanceof \OC\Files\FileInfo);
$this->assertTrue($fileInfoUnencrypted2 instanceof \OC\Files\FileInfo);
// 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);
$this->assertTrue($fileInfoUnencrypted1 instanceof \OC\Files\FileInfo);
$this->assertTrue($fileInfoUnencrypted2 instanceof \OC\Files\FileInfo);
// 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($this->userId . '/files_encryption/share-keys/'));
//cleanup
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$this->view->unlink($this->userId . '/files/' . $file1);
$this->view->unlink($this->userId . '/files/' . $file2);
$this->view->deleteAll($this->userId . '/files_encryption/keyfiles.backup');
$this->view->deleteAll($this->userId . '/files_encryption/share-keys.backup');
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}
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/**
* @large
*/
function testEncryptLegacyFiles() {
\Test_Encryption_Util::loginHelper(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
$userView = new \OC\Files\View('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
$view = new \OC\Files\View('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER . '/files');
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// 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', $encryptionKeyContent);
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$legacyEncryptedData = file_get_contents($this->legacyEncryptedData);
$view->mkdir('/test/');
$view->mkdir('/test/subtest/');
$view->file_put_contents('/test/subtest/legacy-encrypted-text.txt', $legacyEncryptedData);
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$fileInfo = $view->getFileInfo('/test/subtest/legacy-encrypted-text.txt');
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$fileInfo['encrypted'] = true;
$view->putFileInfo('/test/subtest/legacy-encrypted-text.txt', $fileInfo);
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\OC_FileProxy::$enabled = $proxyStatus;
$params['uid'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
$params['password'] = \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER;
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$util = new Encryption\Util($this->view, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
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$this->setMigrationStatus(0, \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER);
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$this->assertTrue(OCA\Encryption\Hooks::login($params));
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$this->assertEquals($this->legacyKey, \OC::$session->get('legacyKey'));
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$files = $util->findEncFiles('/' . \Test_Encryption_Util::TEST_ENCRYPTION_UTIL_LEGACY_USER . '/files/');
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$this->assertTrue(is_array($files));
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$found = false;
foreach ($files['encrypted'] as $encryptedFile) {
if ($encryptedFile['name'] === 'legacy-encrypted-text.txt') {
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$found = true;
break;
}
}
$this->assertTrue($found);
}
/**
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* @param string $user
* @param bool $create
* @param bool $password
*/
public static function loginHelper($user, $create = false, $password = false, $loadEncryption = true) {
if ($create) {
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try {
\OC_User::createUser($user, $user);
} catch(\Exception $e) { // catch username is already being used from previous aborted runs
}
}
if ($password === false) {
$password = $user;
}
\OC_Util::tearDownFS();
\OC_User::setUserId('');
\OC\Files\Filesystem::tearDown();
\OC_User::setUserId($user);
\OC_Util::setupFS($user);
if ($loadEncryption) {
$params['uid'] = $user;
$params['password'] = $password;
OCA\Encryption\Hooks::login($params);
}
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}
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public static function logoutHelper() {
\OC_Util::tearDownFS();
\OC_User::setUserId('');
\OC\Files\Filesystem::tearDown();
}
/**
* helper function to set migration status to the right value
* to be able to test the migration path
*
* @param integer $status needed migration status for test
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* @param string $user for which user the status should be set
* @return boolean
*/
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private function setMigrationStatus($status, $user) {
return \OC_Preferences::setValue($user, 'files_encryption', 'migration_status', (string)$status);
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}
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}