nextcloud/apps/files_encryption/tests/crypt.php

810 lines
22 KiB
PHP
Executable File

<?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 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');
require_once realpath(dirname(__FILE__) . '/util.php');
use OCA\Encryption;
/**
* Class Test_Encryption_Crypt
*/
class Test_Encryption_Crypt extends \PHPUnit_Framework_TestCase {
const TEST_ENCRYPTION_CRYPT_USER1 = "test-crypt-user1";
public $userId;
public $pass;
public $stateFilesTrashbin;
public $dataLong;
public $dataUrl;
public $dataShort;
/**
* @var OC_FilesystemView
*/
public $view;
public $legacyEncryptedData;
public $genPrivateKey;
public $genPublicKey;
public static function setUpBeforeClass() {
// 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
\OC_User::setUserId(\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;
// set content for encrypting / decrypting in tests
$this->dataLong = file_get_contents(realpath(dirname(__FILE__) . '/../lib/crypt.php'));
$this->dataShort = 'hats';
$this->dataUrl = realpath(dirname(__FILE__) . '/../lib/crypt.php');
$this->legacyData = realpath(dirname(__FILE__) . '/legacy-text.txt');
$this->legacyEncryptedData = realpath(dirname(__FILE__) . '/legacy-encrypted-text.txt');
$this->legacyEncryptedDataKey = realpath(dirname(__FILE__) . '/encryption.key');
$this->randomKey = Encryption\Crypt::generateKey();
$keypair = Encryption\Crypt::createKeypair();
$this->genPublicKey = $keypair['publicKey'];
$this->genPrivateKey = $keypair['privateKey'];
$this->view = new \OC_FilesystemView('/');
// 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_Crypt::TEST_ENCRYPTION_CRYPT_USER1);
}
function testGenerateKey() {
# TODO: use more accurate (larger) string length for test confirmation
$key = Encryption\Crypt::generateKey();
$this->assertTrue(strlen($key) > 16);
}
/**
* @return String
*/
function testGenerateIv() {
$iv = Encryption\Crypt::generateIv();
$this->assertEquals(16, strlen($iv));
return $iv;
}
/**
* @depends testGenerateIv
*/
function testConcatIv($iv) {
$catFile = Encryption\Crypt::concatIv($this->dataLong, $iv);
// Fetch encryption metadata from end of file
$meta = substr($catFile, -22);
$identifier = substr($meta, 0, 6);
// Fetch IV from end of file
$foundIv = substr($meta, 6);
$this->assertEquals('00iv00', $identifier);
$this->assertEquals($iv, $foundIv);
// Remove IV and IV identifier text to expose encrypted content
$data = substr($catFile, 0, -22);
$this->assertEquals($this->dataLong, $data);
return array(
'iv' => $iv
,
'catfile' => $catFile
);
}
/**
* @depends testConcatIv
*/
function testSplitIv($testConcatIv) {
// Split catfile into components
$splitCatfile = Encryption\Crypt::splitIv($testConcatIv['catfile']);
// Check that original IV and split IV match
$this->assertEquals($testConcatIv['iv'], $splitCatfile['iv']);
// Check that original data and split data match
$this->assertEquals($this->dataLong, $splitCatfile['encrypted']);
}
/**
* @return string padded
*/
function testAddPadding() {
$padded = Encryption\Crypt::addPadding($this->dataLong);
$padding = substr($padded, -2);
$this->assertEquals('xx', $padding);
return $padded;
}
/**
* @depends testAddPadding
*/
function testRemovePadding($padded) {
$noPadding = Encryption\Crypt::RemovePadding($padded);
$this->assertEquals($this->dataLong, $noPadding);
}
function testEncrypt() {
$random = openssl_random_pseudo_bytes(13);
$iv = substr(base64_encode($random), 0, -4); // i.e. E5IG033j+mRNKrht
$crypted = Encryption\Crypt::encrypt($this->dataUrl, $iv, 'hat');
$this->assertNotEquals($this->dataUrl, $crypted);
}
function testDecrypt() {
$random = openssl_random_pseudo_bytes(13);
$iv = substr(base64_encode($random), 0, -4); // i.e. E5IG033j+mRNKrht
$crypted = Encryption\Crypt::encrypt($this->dataUrl, $iv, 'hat');
$decrypt = Encryption\Crypt::decrypt($crypted, $iv, 'hat');
$this->assertEquals($this->dataUrl, $decrypt);
}
function testSymmetricEncryptFileContent() {
# 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);
$decrypt = Encryption\Crypt::symmetricDecryptFileContent($crypted, 'hat');
$this->assertEquals($this->dataShort, $decrypt);
}
function testSymmetricStreamEncryptShortFileContent() {
$filename = 'tmp-' . time() . '.test';
$cryptedFile = file_put_contents('crypt://' . $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 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 the encrypted keyfile
$encKeyfile = Encryption\Keymanager::getFileKey($this->view, $this->userId, $filename);
// Attempt to fetch the user's shareKey
$shareKey = Encryption\Keymanager::getShareKey($this->view, $this->userId, $filename);
// get session
$session = new Encryption\Session($this->view);
// get private key
$privateKey = $session->getPrivateKey($this->userId);
// Decrypt keyfile with shareKey
$plainKeyfile = Encryption\Crypt::multiKeyDecrypt($encKeyfile, $shareKey, $privateKey);
// Manually decrypt
$manualDecrypt = Encryption\Crypt::symmetricDecryptFileContent($retreivedCryptedFile, $plainKeyfile);
// Check that decrypted data matches
$this->assertEquals($this->dataShort, $manualDecrypt);
// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $this->userId, $filename);
}
/**
* @brief 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
* @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() {
// Generate a a random filename
$filename = 'tmp-' . time() . '.test';
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $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;
// 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);
// Manuallly split saved file into separate IVs and encrypted chunks
$r = preg_split('/(00iv00.{16,18})/', $retreivedCryptedFile, NULL, PREG_SPLIT_DELIM_CAPTURE);
//print_r($r);
// Join IVs and their respective data chunks
$e = array(
$r[0] . $r[1],
$r[2] . $r[3],
$r[4] . $r[5],
$r[6] . $r[7],
$r[8] . $r[9],
$r[10] . $r[11]
); //.$r[11], $r[12].$r[13], $r[14] );
//print_r($e);
// Get the encrypted keyfile
$encKeyfile = Encryption\Keymanager::getFileKey($this->view, $this->userId, $filename);
// Attempt to fetch the user's shareKey
$shareKey = Encryption\Keymanager::getShareKey($this->view, $this->userId, $filename);
// get session
$session = new Encryption\Session($this->view);
// get private key
$privateKey = $session->getPrivateKey($this->userId);
// Decrypt keyfile with shareKey
$plainKeyfile = Encryption\Crypt::multiKeyDecrypt($encKeyfile, $shareKey, $privateKey);
// Set var for reassembling decrypted content
$decrypt = '';
// Manually decrypt chunk
foreach ($e as $chunk) {
$chunkDecrypt = Encryption\Crypt::symmetricDecryptFileContent($chunk, $plainKeyfile);
// Assemble decrypted chunks
$decrypt .= $chunkDecrypt;
}
$this->assertEquals($this->dataLong . $this->dataLong, $decrypt);
// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $this->userId, $filename);
}
/**
* @brief Test that data that is read by the crypto stream wrapper
*/
function testSymmetricStreamDecryptShortFileContent() {
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $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;
$this->assertTrue(Encryption\Crypt::isEncryptedMeta($filename));
\OC_FileProxy::$enabled = $proxyStatus;
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataShort, $decrypt);
// tear down
$this->view->unlink($this->userId . '/files/' . $filename);
}
function testSymmetricStreamDecryptLongFileContent() {
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
// tear down
$this->view->unlink($this->userId . '/files/' . $filename);
}
function testSymmetricEncryptFileContentKeyfile() {
# TODO: search in keyfile for actual content as IV will ensure this test always passes
$crypted = Encryption\Crypt::symmetricEncryptFileContentKeyfile($this->dataUrl);
$this->assertNotEquals($this->dataUrl, $crypted['encrypted']);
$decrypt = Encryption\Crypt::symmetricDecryptFileContent($crypted['encrypted'], $crypted['key']);
$this->assertEquals($this->dataUrl, $decrypt);
}
function testIsEncryptedContent() {
$this->assertFalse(Encryption\Crypt::isCatfileContent($this->dataUrl));
$this->assertFalse(Encryption\Crypt::isCatfileContent($this->legacyEncryptedData));
$keyfileContent = Encryption\Crypt::symmetricEncryptFileContent($this->dataUrl, 'hat');
$this->assertTrue(Encryption\Crypt::isCatfileContent($keyfileContent));
}
function testMultiKeyEncrypt() {
# TODO: search in keyfile for actual content as IV will ensure this test always passes
$pair1 = Encryption\Crypt::createKeypair();
$this->assertEquals(2, count($pair1));
$this->assertTrue(strlen($pair1['publicKey']) > 1);
$this->assertTrue(strlen($pair1['privateKey']) > 1);
$crypted = Encryption\Crypt::multiKeyEncrypt($this->dataShort, array($pair1['publicKey']));
$this->assertNotEquals($this->dataShort, $crypted['data']);
$decrypt = Encryption\Crypt::multiKeyDecrypt($crypted['data'], $crypted['keys'][0], $pair1['privateKey']);
$this->assertEquals($this->dataShort, $decrypt);
}
function testKeyEncrypt() {
// Generate keypair
$pair1 = Encryption\Crypt::createKeypair();
// Encrypt data
$crypted = Encryption\Crypt::keyEncrypt($this->dataUrl, $pair1['publicKey']);
$this->assertNotEquals($this->dataUrl, $crypted);
// Decrypt data
$decrypt = Encryption\Crypt::keyDecrypt($crypted, $pair1['privateKey']);
$this->assertEquals($this->dataUrl, $decrypt);
}
/**
* @brief test encryption using legacy blowfish method
*/
function testLegacyEncryptShort() {
$crypted = Encryption\Crypt::legacyEncrypt($this->dataShort, $this->pass);
$this->assertNotEquals($this->dataShort, $crypted);
# TODO: search inencrypted text for actual content to ensure it
# genuine transformation
return $crypted;
}
/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptShort
*/
function testLegacyDecryptShort($crypted) {
$decrypted = Encryption\Crypt::legacyDecrypt($crypted, $this->pass);
$this->assertEquals($this->dataShort, $decrypted);
}
/**
* @brief test encryption using legacy blowfish method
*/
function testLegacyEncryptLong() {
$crypted = Encryption\Crypt::legacyEncrypt($this->dataLong, $this->pass);
$this->assertNotEquals($this->dataLong, $crypted);
# TODO: search inencrypted text for actual content to ensure it
# genuine transformation
return $crypted;
}
/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptLong
*/
function testLegacyDecryptLong($crypted) {
$decrypted = Encryption\Crypt::legacyDecrypt($crypted, $this->pass);
$this->assertEquals($this->dataLong, $decrypted);
$this->assertFalse(Encryption\Crypt::getBlowfish(''));
}
/**
* @brief test generation of legacy encryption key
* @depends testLegacyDecryptShort
*/
function testLegacyCreateKey() {
// Create encrypted key
$encKey = Encryption\Crypt::legacyCreateKey($this->pass);
// Decrypt key
$key = Encryption\Crypt::legacyDecrypt($encKey, $this->pass);
$this->assertTrue(is_numeric($key));
// Check that key is correct length
$this->assertEquals(20, strlen($key));
}
/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptLong
*/
function testLegacyKeyRecryptKeyfileEncrypt($crypted) {
$recrypted = Encryption\Crypt::LegacyKeyRecryptKeyfile($crypted, $this->pass, array($this->genPublicKey), $this->pass, '');
$this->assertNotEquals($this->dataLong, $recrypted['data']);
return $recrypted;
# TODO: search inencrypted text for actual content to ensure it
# genuine transformation
}
function testRenameFile() {
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
$newFilename = 'tmp-new-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->rename($filename, $newFilename);
// Get file decrypted contents
$newDecrypt = file_get_contents('crypt://' . $newFilename);
$this->assertEquals($this->dataLong, $newDecrypt);
// tear down
$view->unlink($newFilename);
}
function testMoveFileIntoFolder() {
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
$newFolder = '/newfolder' . time();
$newFilename = 'tmp-new-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->mkdir($newFolder);
$view->rename($filename, $newFolder . '/' . $newFilename);
// Get file decrypted contents
$newDecrypt = file_get_contents('crypt://' . $newFolder . '/' . $newFilename);
$this->assertEquals($this->dataLong, $newDecrypt);
// tear down
$view->unlink($newFolder);
}
function testMoveFolder() {
$view = new \OC\Files\View('/' . $this->userId . '/files');
$filename = '/tmp-' . time();
$folder = '/folder' . time();
$view->mkdir($folder);
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $folder . $filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $folder . $filename);
$this->assertEquals($this->dataLong, $decrypt);
$newFolder = '/newfolder/subfolder' . time();
$view->mkdir('/newfolder');
$view->rename($folder, $newFolder);
// Get file decrypted contents
$newDecrypt = file_get_contents('crypt://' . $newFolder . $filename);
$this->assertEquals($this->dataLong, $newDecrypt);
// tear down
$view->unlink($newFolder);
$view->unlink('/newfolder');
}
function testChangePassphrase() {
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
// Test that data was successfully written
$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataLong, $decrypt);
// change password
\OC_User::setPassword($this->userId, 'test', null);
// relogin
$params['uid'] = $this->userId;
$params['password'] = 'test';
OCA\Encryption\Hooks::login($params);
// Get file decrypted contents
$newDecrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataLong, $newDecrypt);
// tear down
// change password back
\OC_User::setPassword($this->userId, $this->pass);
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->unlink($filename);
}
function testViewFilePutAndGetContents() {
$filename = '/tmp-' . time();
$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);
}
function testTouchExistingFile() {
$filename = '/tmp-' . time();
$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);
}
function testTouchFile() {
$filename = '/tmp-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->touch($filename);
// 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);
// tear down
$view->unlink($filename);
}
function testFopenFile() {
$filename = '/tmp-' . time();
$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);
}
}