nextcloud/apps/files_encryption/tests/crypt.php

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<?php
/**
* Copyright (c) 2012 Sam Tuke <samtuke@owncloud.com>, and
* Robin Appelman <icewind@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__ . '/../lib/helper.php';
require_once __DIR__ . '/../appinfo/app.php';
require_once __DIR__ . '/util.php';
use OCA\Encryption;
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/**
* Class Test_Encryption_Crypt
*/
class Test_Encryption_Crypt extends \PHPUnit_Framework_TestCase {
const TEST_ENCRYPTION_CRYPT_USER1 = "test-crypt-user1";
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public $userId;
public $pass;
public $stateFilesTrashbin;
public $dataLong;
public $dataUrl;
public $dataShort;
/**
* @var OC\Files\View
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*/
public $view;
public $legacyEncryptedData;
public $genPrivateKey;
public $genPublicKey;
public static function setUpBeforeClass() {
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// reset backend
\OC_User::clearBackends();
\OC_User::useBackend('database');
// Filesystem related hooks
\OCA\Encryption\Helper::registerFilesystemHooks();
// Filesystem related hooks
\OCA\Encryption\Helper::registerUserHooks();
// clear and register hooks
\OC_FileProxy::clearProxies();
\OC_FileProxy::register(new OCA\Encryption\Proxy());
// create test user
\Test_Encryption_Util::loginHelper(\Test_Encryption_Crypt::TEST_ENCRYPTION_CRYPT_USER1, true);
}
function setUp() {
// set user id
\Test_Encryption_Util::loginHelper(\Test_Encryption_Crypt::TEST_ENCRYPTION_CRYPT_USER1);
$this->userId = \Test_Encryption_Crypt::TEST_ENCRYPTION_CRYPT_USER1;
$this->pass = \Test_Encryption_Crypt::TEST_ENCRYPTION_CRYPT_USER1;
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// set content for encrypting / decrypting in tests
$this->dataLong = file_get_contents(__DIR__ . '/../lib/crypt.php');
$this->dataShort = 'hats';
$this->dataUrl = __DIR__ . '/../lib/crypt.php';
$this->legacyData = __DIR__ . '/legacy-text.txt';
$this->legacyEncryptedData = __DIR__ . '/legacy-encrypted-text.txt';
$this->legacyEncryptedDataKey = __DIR__ . '/encryption.key';
$this->randomKey = Encryption\Crypt::generateKey();
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$keypair = Encryption\Crypt::createKeypair();
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$this->genPublicKey = $keypair['publicKey'];
$this->genPrivateKey = $keypair['privateKey'];
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$this->view = new \OC\Files\View('/');
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// remember files_trashbin state
$this->stateFilesTrashbin = OC_App::isEnabled('files_trashbin');
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// we don't want to tests with app files_trashbin enabled
\OC_App::disable('files_trashbin');
}
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function tearDown() {
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// reset app files_trashbin
if ($this->stateFilesTrashbin) {
OC_App::enable('files_trashbin');
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} else {
OC_App::disable('files_trashbin');
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}
$this->assertTrue(\OC_FileProxy::$enabled);
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\OCP\Config::deleteSystemValue('cipher');
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}
public static function tearDownAfterClass() {
// cleanup test user
\OC_User::deleteUser(\Test_Encryption_Crypt::TEST_ENCRYPTION_CRYPT_USER1);
}
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/**
* @medium
*/
function testGenerateKey() {
# TODO: use more accurate (larger) string length for test confirmation
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$key = Encryption\Crypt::generateKey();
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$this->assertTrue(strlen($key) > 16);
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}
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function testDecryptPrivateKey() {
// test successful decrypt
$crypted = Encryption\Crypt::symmetricEncryptFileContent($this->genPrivateKey, 'hat');
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$header = Encryption\Crypt::generateHeader();
$decrypted = Encryption\Crypt::decryptPrivateKey($header . $crypted, 'hat');
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$this->assertEquals($this->genPrivateKey, $decrypted);
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//test private key decrypt with wrong password
$wrongPasswd = Encryption\Crypt::decryptPrivateKey($crypted, 'hat2');
$this->assertEquals(false, $wrongPasswd);
}
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/**
* @medium
*/
function testSymmetricEncryptFileContent() {
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# TODO: search in keyfile for actual content as IV will ensure this test always passes
$crypted = Encryption\Crypt::symmetricEncryptFileContent($this->dataShort, 'hat');
$this->assertNotEquals($this->dataShort, $crypted);
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$decrypt = Encryption\Crypt::symmetricDecryptFileContent($crypted, 'hat');
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$this->assertEquals($this->dataShort, $decrypt);
}
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/**
* @medium
*/
function testSymmetricEncryptFileContentAes128() {
# TODO: search in keyfile for actual content as IV will ensure this test always passes
$crypted = Encryption\Crypt::symmetricEncryptFileContent($this->dataShort, 'hat', 'AES-128-CFB');
$this->assertNotEquals($this->dataShort, $crypted);
$decrypt = Encryption\Crypt::symmetricDecryptFileContent($crypted, 'hat', 'AES-128-CFB');
$this->assertEquals($this->dataShort, $decrypt);
}
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/**
* @medium
*/
function testSymmetricStreamEncryptShortFileContent() {
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$filename = 'tmp-' . uniqid() . '.test';
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$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/'. $filename, $this->dataShort);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Disable encryption proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
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// Get file contents without using any wrapper to get it's actual contents on disk
$retreivedCryptedFile = $this->view->file_get_contents($this->userId . '/files/' . $filename);
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// Re-enable proxy - our work is done
\OC_FileProxy::$enabled = $proxyStatus;
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// Check that the file was encrypted before being written to disk
$this->assertNotEquals($this->dataShort, $retreivedCryptedFile);
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// Get file contents with the encryption wrapper
$decrypted = file_get_contents('crypt:///' . $this->userId . '/files/'. $filename);
// Check that decrypted data matches
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$this->assertEquals($this->dataShort, $decrypted);
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// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $filename);
}
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/**
* @medium
*/
function testSymmetricStreamEncryptShortFileContentAes128() {
$filename = 'tmp-' . uniqid() . '.test';
\OCP\Config::setSystemValue('cipher', 'AES-128-CFB');
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/'. $filename, $this->dataShort);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
\OCP\Config::deleteSystemValue('cipher');
// Disable encryption proxy to prevent recursive calls
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
// Get file contents without using any wrapper to get it's actual contents on disk
$retreivedCryptedFile = $this->view->file_get_contents($this->userId . '/files/' . $filename);
// Re-enable proxy - our work is done
\OC_FileProxy::$enabled = $proxyStatus;
// Check that the file was encrypted before being written to disk
$this->assertNotEquals($this->dataShort, $retreivedCryptedFile);
// Get file contents with the encryption wrapper
$decrypted = file_get_contents('crypt:///' . $this->userId . '/files/'. $filename);
// Check that decrypted data matches
$this->assertEquals($this->dataShort, $decrypted);
// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $filename);
}
/**
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* @medium
* Test that data that is written by the crypto stream wrapper
* @note Encrypted data is manually prepared and decrypted here to avoid dependency on success of stream_read
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* @note If this test fails with truncate content, check that enough array slices are being rejoined to form $e, as the crypt.php file may have gotten longer and broken the manual
* reassembly of its data
*/
function testSymmetricStreamEncryptLongFileContent() {
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// Generate a a random filename
$filename = 'tmp-' . uniqid() . '.test';
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong . $this->dataLong);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Disable encryption proxy to prevent recursive calls
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$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
// Get file contents without using any wrapper to get it's actual contents on disk
$retreivedCryptedFile = $this->view->file_get_contents($this->userId . '/files/' . $filename);
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// Re-enable proxy - our work is done
\OC_FileProxy::$enabled = $proxyStatus;
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// Check that the file was encrypted before being written to disk
$this->assertNotEquals($this->dataLong . $this->dataLong, $retreivedCryptedFile);
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$decrypted = file_get_contents('crypt:///' . $this->userId . '/files/'. $filename);
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$this->assertEquals($this->dataLong . $this->dataLong, $decrypted);
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// Teardown
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$this->view->unlink($this->userId . '/files/' . $filename);
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Encryption\Keymanager::deleteFileKey($this->view, $filename);
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}
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/**
* @medium
* Test that data that is written by the crypto stream wrapper with AES 128
* @note Encrypted data is manually prepared and decrypted here to avoid dependency on success of stream_read
* @note If this test fails with truncate content, check that enough array slices are being rejoined to form $e, as the crypt.php file may have gotten longer and broken the manual
* reassembly of its data
*/
function testSymmetricStreamEncryptLongFileContentAes128() {
// Generate a a random filename
$filename = 'tmp-' . uniqid() . '.test';
\OCP\Config::setSystemValue('cipher', 'AES-128-CFB');
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong . $this->dataLong);
// 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;
\OCP\Config::deleteSystemValue('cipher');
// Get file contents without using any wrapper to get it's actual contents on disk
$retreivedCryptedFile = $this->view->file_get_contents($this->userId . '/files/' . $filename);
// Re-enable proxy - our work is done
\OC_FileProxy::$enabled = $proxyStatus;
// Check that the file was encrypted before being written to disk
$this->assertNotEquals($this->dataLong . $this->dataLong, $retreivedCryptedFile);
$decrypted = file_get_contents('crypt:///' . $this->userId . '/files/'. $filename);
$this->assertEquals($this->dataLong . $this->dataLong, $decrypted);
// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $filename);
}
/**
* @medium
* Test that data that is written by the crypto stream wrapper with AES 128
* @note Encrypted data is manually prepared and decrypted here to avoid dependency on success of stream_read
* @note If this test fails with truncate content, check that enough array slices are being rejoined to form $e, as the crypt.php file may have gotten longer and broken the manual
* reassembly of its data
*/
function testStreamDecryptLongFileContentWithoutHeader() {
// Generate a a random filename
$filename = 'tmp-' . uniqid() . '.test';
\OCP\Config::setSystemValue('cipher', 'AES-128-CFB');
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong . $this->dataLong);
\OCP\Config::deleteSystemValue('cipher');
// 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 file contents without using any wrapper to get it's actual contents on disk
$retreivedCryptedFile = $this->view->file_get_contents($this->userId . '/files/' . $filename);
// Check that the file was encrypted before being written to disk
$this->assertNotEquals($this->dataLong . $this->dataLong, $retreivedCryptedFile);
// remove the header to check if we can also decrypt old files without a header,
// this files should fall back to AES-128
$cryptedWithoutHeader = substr($retreivedCryptedFile, Encryption\Crypt::BLOCKSIZE);
$this->view->file_put_contents($this->userId . '/files/' . $filename, $cryptedWithoutHeader);
// Re-enable proxy - our work is done
\OC_FileProxy::$enabled = $proxyStatus;
$decrypted = file_get_contents('crypt:///' . $this->userId . '/files/'. $filename);
$this->assertEquals($this->dataLong . $this->dataLong, $decrypted);
// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $filename);
}
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/**
* @medium
*/
function testIsEncryptedContent() {
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$this->assertFalse(Encryption\Crypt::isCatfileContent($this->dataUrl));
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$this->assertFalse(Encryption\Crypt::isCatfileContent($this->legacyEncryptedData));
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$keyfileContent = Encryption\Crypt::symmetricEncryptFileContent($this->dataUrl, 'hat', 'AES-128-CFB');
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$this->assertTrue(Encryption\Crypt::isCatfileContent($keyfileContent));
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}
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/**
* @large
*/
function testMultiKeyEncrypt() {
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# TODO: search in keyfile for actual content as IV will ensure this test always passes
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$pair1 = Encryption\Crypt::createKeypair();
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$this->assertEquals(2, count($pair1));
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$this->assertTrue(strlen($pair1['publicKey']) > 1);
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$this->assertTrue(strlen($pair1['privateKey']) > 1);
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$crypted = Encryption\Crypt::multiKeyEncrypt($this->dataShort, array($pair1['publicKey']));
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$this->assertNotEquals($this->dataShort, $crypted['data']);
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$decrypt = Encryption\Crypt::multiKeyDecrypt($crypted['data'], $crypted['keys'][0], $pair1['privateKey']);
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$this->assertEquals($this->dataShort, $decrypt);
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}
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/**
* @medium
*/
function testRenameFile() {
$filename = 'tmp-' . uniqid();
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
$newFilename = 'tmp-new-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->rename($filename, $newFilename);
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// Get file decrypted contents
$newDecrypt = file_get_contents('crypt:///'. $this->userId . '/files/' . $newFilename);
$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
$view->unlink($newFilename);
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}
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/**
* @medium
*/
function testMoveFileIntoFolder() {
$filename = 'tmp-' . uniqid();
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
$newFolder = '/newfolder' . uniqid();
$newFilename = 'tmp-new-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->mkdir($newFolder);
$view->rename($filename, $newFolder . '/' . $newFilename);
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// Get file decrypted contents
$newDecrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $newFolder . '/' . $newFilename);
$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
$view->unlink($newFolder);
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}
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/**
* @medium
*/
function testMoveFolder() {
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$view = new \OC\Files\View('/' . $this->userId . '/files');
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$filename = '/tmp-' . uniqid();
$folder = '/folder' . uniqid();
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$view->mkdir($folder);
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $folder . $filename, $this->dataLong);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $folder . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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$newFolder = '/newfolder/subfolder' . uniqid();
$view->mkdir('/newfolder');
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$view->rename($folder, $newFolder);
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// Get file decrypted contents
$newDecrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $newFolder . $filename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
$view->unlink($newFolder);
$view->unlink('/newfolder');
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}
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/**
* @medium
*/
function testChangePassphrase() {
$filename = 'tmp-' . uniqid();
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt:///' . $this->userId . '/files/' . $filename, $this->dataLong);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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// change password
\OC_User::setPassword($this->userId, 'test', null);
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// relogin
$params['uid'] = $this->userId;
$params['password'] = 'test';
OCA\Encryption\Hooks::login($params);
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// Get file decrypted contents
$newDecrypt = file_get_contents('crypt:///' . $this->userId . '/files/' . $filename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
// change password back
\OC_User::setPassword($this->userId, $this->pass);
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->unlink($filename);
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}
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/**
* @medium
*/
function testViewFilePutAndGetContents() {
$filename = '/tmp-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = $view->file_get_contents($filename);
$this->assertEquals($this->dataShort, $decrypt);
// Save long data as encrypted file using stream wrapper
$cryptedFileLong = $view->file_put_contents($filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFileLong));
// Get file decrypted contents
$decryptLong = $view->file_get_contents($filename);
$this->assertEquals($this->dataLong, $decryptLong);
// tear down
$view->unlink($filename);
}
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/**
* @large
*/
function testTouchExistingFile() {
$filename = '/tmp-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
$view->touch($filename);
// Get file decrypted contents
$decrypt = $view->file_get_contents($filename);
$this->assertEquals($this->dataShort, $decrypt);
// tear down
$view->unlink($filename);
}
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/**
* @medium
*/
function testTouchFile() {
$filename = '/tmp-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
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$view->touch($filename);
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// Save short data as encrypted file using stream wrapper
$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
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// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = $view->file_get_contents($filename);
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$this->assertEquals($this->dataShort, $decrypt);
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// tear down
$view->unlink($filename);
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}
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/**
* @medium
*/
function testFopenFile() {
$filename = '/tmp-' . uniqid();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
$handle = $view->fopen($filename, 'r');
// Get file decrypted contents
$decrypt = fgets($handle);
$this->assertEquals($this->dataShort, $decrypt);
// tear down
$view->unlink($filename);
}
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}