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.
*/
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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;
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/**
* Class Test_Encryption_Crypt
*/
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class Test_Encryption_Crypt extends \PHPUnit_Framework_TestCase
{
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public $userId;
public $pass;
public $stateFilesTrashbin;
public $dataLong;
public $dataUrl;
public $dataShort;
/**
* @var OC_FilesystemView
*/
public $view;
public $legacyEncryptedData;
public $genPrivateKey;
public $genPublicKey;
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function setUp()
{
// reset backend
\OC_User::clearBackends();
\OC_User::useBackend('database');
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// set content for encrypting / decrypting in tests
$this->dataLong = file_get_contents(realpath(dirname(__FILE__) . '/../lib/crypt.php'));
$this->dataShort = 'hats';
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$this->dataUrl = realpath(dirname(__FILE__) . '/../lib/crypt.php');
$this->legacyData = realpath(dirname(__FILE__) . '/legacy-text.txt');
$this->legacyEncryptedData = realpath(dirname(__FILE__) . '/legacy-encrypted-text.txt');
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$this->legacyEncryptedDataKey = realpath(dirname(__FILE__) . '/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_FilesystemView('/');
\OC_User::setUserId('admin');
$this->userId = 'admin';
$this->pass = 'admin';
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$userHome = \OC_User::getHome($this->userId);
$this->dataDir = str_replace('/' . $this->userId, '', $userHome);
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// Filesystem related hooks
\OCA\Encryption\Helper::registerFilesystemHooks();
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// Filesystem related hooks
\OCA\Encryption\Helper::registerUserHooks();
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\OC_FileProxy::register(new OCA\Encryption\Proxy());
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// remember files_trashbin state
$this->stateFilesTrashbin = OC_App::isEnabled('files_trashbin');
// we don't want to tests with app files_trashbin enabled
\OC_App::disable('files_trashbin');
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\OC_Util::tearDownFS();
\OC_User::setUserId('');
\OC\Files\Filesystem::tearDown();
\OC_Util::setupFS($this->userId);
\OC_User::setUserId($this->userId);
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$params['uid'] = $this->userId;
$params['password'] = $this->pass;
OCA\Encryption\Hooks::login($params);
}
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function tearDown()
{
\OC_FileProxy::clearProxies();
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// reset app files_trashbin
if ($this->stateFilesTrashbin) {
OC_App::enable('files_trashbin');
} else {
OC_App::disable('files_trashbin');
}
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}
function testGenerateKey()
{
# TODO: use more accurate (larger) string length for test confirmation
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$key = Encryption\Crypt::generateKey();
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$this->assertTrue(strlen($key) > 16);
}
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/**
* @return String
*/
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function testGenerateIv()
{
$iv = Encryption\Crypt::generateIv();
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$this->assertEquals(16, strlen($iv));
return $iv;
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}
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/**
* @depends testGenerateIv
*/
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function testConcatIv($iv)
{
$catFile = Encryption\Crypt::concatIv($this->dataLong, $iv);
// Fetch encryption metadata from end of file
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$meta = substr($catFile, -22);
$identifier = substr($meta, 0, 6);
// Fetch IV from end of file
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$foundIv = substr($meta, 6);
$this->assertEquals('00iv00', $identifier);
$this->assertEquals($iv, $foundIv);
// Remove IV and IV identifier text to expose encrypted content
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$data = substr($catFile, 0, -22);
$this->assertEquals($this->dataLong, $data);
return array(
'iv' => $iv
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, 'catfile' => $catFile
);
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}
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/**
* @depends testConcatIv
*/
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function testSplitIv($testConcatIv)
{
// Split catfile into components
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$splitCatfile = Encryption\Crypt::splitIv($testConcatIv['catfile']);
// Check that original IV and split IV match
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$this->assertEquals($testConcatIv['iv'], $splitCatfile['iv']);
// Check that original data and split data match
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$this->assertEquals($this->dataLong, $splitCatfile['encrypted']);
}
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/**
* @return string padded
*/
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function testAddPadding()
{
$padded = Encryption\Crypt::addPadding($this->dataLong);
$padding = substr($padded, -2);
$this->assertEquals('xx', $padding);
return $padded;
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}
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/**
* @depends testAddPadding
*/
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function testRemovePadding($padded)
{
$noPadding = Encryption\Crypt::RemovePadding($padded);
$this->assertEquals($this->dataLong, $noPadding);
}
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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, $iv, 'hat');
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$this->assertNotEquals($this->dataUrl, $crypted);
}
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function testDecrypt()
{
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$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, $decrypt);
}
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function testSymmetricEncryptFileContent()
{
# TODO: search in keyfile for actual content as IV will ensure this test always passes
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$crypted = Encryption\Crypt::symmetricEncryptFileContent($this->dataShort, 'hat');
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$this->assertNotEquals($this->dataShort, $crypted);
$decrypt = Encryption\Crypt::symmetricDecryptFileContent($crypted, 'hat');
$this->assertEquals($this->dataShort, $decrypt);
}
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function testSymmetricStreamEncryptShortFileContent()
{
$filename = 'tmp-' . time() . '.test';
$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataShort);
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// Test that data was successfully written
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$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 = $proxyStatus;
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// Check that the file was encrypted before being written to disk
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$this->assertNotEquals($this->dataShort, $retreivedCryptedFile);
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// Get the encrypted keyfile
$encKeyfile = Encryption\Keymanager::getFileKey($this->view, $this->userId, $filename);
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// Attempt to fetch the user's shareKey
$shareKey = Encryption\Keymanager::getShareKey($this->view, $this->userId, $filename);
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// get session
$session = new Encryption\Session($this->view);
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// get private key
$privateKey = $session->getPrivateKey($this->userId);
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// Decrypt keyfile with shareKey
$plainKeyfile = Encryption\Crypt::multiKeyDecrypt($encKeyfile, $shareKey, $privateKey);
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// Manually decrypt
$manualDecrypt = Encryption\Crypt::symmetricDecryptFileContent($retreivedCryptedFile, $plainKeyfile);
// Check that decrypted data matches
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$this->assertEquals($this->dataShort, $manualDecrypt);
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// Teardown
$this->view->unlink($this->userId . '/files/' . $filename);
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Encryption\Keymanager::deleteFileKey($this->view, $this->userId, $filename);
}
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/**
* @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
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* @note If this test fails with truncate content, check that enough array slices are being rejoined to form $e, as the crypt.php file may have gotten longer and broken the manual
* reassembly of its data
*/
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function testSymmetricStreamEncryptLongFileContent()
{
// Generate a a random filename
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$filename = 'tmp-' . time() . '.test';
// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong . $this->dataLong);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
// Disable encryption proxy to prevent recursive calls
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$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);
// Manuallly split saved file into separate IVs and encrypted chunks
$r = preg_split('/(00iv00.{16,18})/', $retreivedCryptedFile, NULL, PREG_SPLIT_DELIM_CAPTURE);
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//print_r($r);
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// Join IVs and their respective data chunks
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$e = array($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);
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// Get the encrypted keyfile
$encKeyfile = Encryption\Keymanager::getFileKey($this->view, $this->userId, $filename);
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// Attempt to fetch the user's shareKey
$shareKey = Encryption\Keymanager::getShareKey($this->view, $this->userId, $filename);
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// get session
$session = new Encryption\Session($this->view);
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// get private key
$privateKey = $session->getPrivateKey($this->userId);
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// Decrypt keyfile with shareKey
$plainKeyfile = Encryption\Crypt::multiKeyDecrypt($encKeyfile, $shareKey, $privateKey);
// Set var for reassembling decrypted content
$decrypt = '';
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// Manually decrypt chunk
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foreach ($e as $chunk) {
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$chunkDecrypt = Encryption\Crypt::symmetricDecryptFileContent($chunk, $plainKeyfile);
// Assemble decrypted chunks
$decrypt .= $chunkDecrypt;
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}
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$this->assertEquals($this->dataLong . $this->dataLong, $decrypt);
// Teardown
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$this->view->unlink($this->userId . '/files/' . $filename);
Encryption\Keymanager::deleteFileKey($this->view, $this->userId, $filename);
}
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/**
* @brief Test that data that is read by the crypto stream wrapper
*/
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function testSymmetricStreamDecryptShortFileContent()
{
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataShort);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// 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;
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// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
$this->assertEquals($this->dataShort, $decrypt);
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// tear down
$this->view->unlink($this->userId . '/files/' . $filename);
}
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function testSymmetricStreamDecryptLongFileContent()
{
$filename = 'tmp-' . time();
// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
$decrypt = file_get_contents('crypt://' . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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// tear down
$this->view->unlink($this->userId . '/files/' . $filename);
}
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// Is this test still necessary?
// function testSymmetricBlockStreamDecryptFileContent() {
//
// \OC_User::setUserId( 'admin' );
//
// // Disable encryption proxy to prevent unwanted en/decryption
// \OC_FileProxy::$enabled = false;
//
// $cryptedFile = file_put_contents( 'crypt://' . '/blockEncrypt', $this->dataUrl );
//
// // Disable encryption proxy to prevent unwanted en/decryption
// \OC_FileProxy::$enabled = false;
//
// echo "\n\n\$cryptedFile = " . $this->view->file_get_contents( '/blockEncrypt' );
//
// $retreivedCryptedFile = file_get_contents( 'crypt://' . '/blockEncrypt' );
//
// $this->assertEquals( $this->dataUrl, $retreivedCryptedFile );
//
// \OC_FileProxy::$enabled = false;
//
// }
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function testSymmetricEncryptFileContentKeyfile()
{
# TODO: search in keyfile for actual content as IV will ensure this test always passes
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$crypted = Encryption\Crypt::symmetricEncryptFileContentKeyfile($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
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$pair1 = Encryption\Crypt::createKeypair();
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$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
$pair1 = Encryption\Crypt::createKeypair();
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// Encrypt data
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$crypted = Encryption\Crypt::keyEncrypt($this->dataUrl, $pair1['publicKey']);
$this->assertNotEquals($this->dataUrl, $crypted);
// Decrypt data
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$decrypt = Encryption\Crypt::keyDecrypt($crypted, $pair1['privateKey']);
$this->assertEquals($this->dataUrl, $decrypt);
}
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/**
* @brief test encryption using legacy blowfish method
*/
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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
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return $crypted;
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}
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/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptShort
*/
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function testLegacyDecryptShort($crypted)
{
$decrypted = Encryption\Crypt::legacyDecrypt($crypted, $this->pass);
$this->assertEquals($this->dataShort, $decrypted);
}
/**
* @brief test encryption using legacy blowfish method
*/
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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
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return $crypted;
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}
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/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptLong
*/
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function testLegacyDecryptLong($crypted)
{
$decrypted = Encryption\Crypt::legacyDecrypt($crypted, $this->pass);
$this->assertEquals($this->dataLong, $decrypted);
}
/**
* @brief test generation of legacy encryption key
* @depends testLegacyDecryptShort
*/
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function testLegacyCreateKey()
{
// Create encrypted key
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$encKey = Encryption\Crypt::legacyCreateKey($this->pass);
// Decrypt key
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$key = Encryption\Crypt::legacyDecrypt($encKey, $this->pass);
$this->assertTrue(is_numeric($key));
// Check that key is correct length
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$this->assertEquals(20, strlen($key));
}
/**
* @brief test decryption using legacy blowfish method
* @depends testLegacyEncryptLong
*/
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function testLegacyKeyRecryptKeyfileEncrypt($crypted)
{
$recrypted = Encryption\Crypt::LegacyKeyRecryptKeyfile($crypted, $this->pass, array($this->genPublicKey), $this->pass, '');
$this->assertNotEquals($this->dataLong, $recrypted['data']);
return $recrypted;
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# TODO: search inencrypted text for actual content to ensure it
# genuine transformation
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}
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function testRenameFile()
{
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$filename = 'tmp-' . time();
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $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
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$decrypt = file_get_contents('crypt://' . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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$newFilename = 'tmp-new-' . time();
$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://' . $newFilename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
$view->unlink($newFilename);
}
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function testMoveFileIntoFolder()
{
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$filename = 'tmp-' . time();
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// Save long data as encrypted file using stream wrapper
$cryptedFile = file_put_contents('crypt://' . $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://' . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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$newFolder = '/newfolder' . time();
$newFilename = 'tmp-new-' . time();
$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://' . $newFolder . '/' . $newFilename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
$view->unlink($newFolder);
}
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function testMoveFolder()
{
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$view = new \OC\Files\View('/' . $this->userId . '/files');
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$filename = '/tmp-' . time();
$folder = '/folder' . time();
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$view->mkdir($folder);
// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $folder . $filename, $this->dataLong);
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// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
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$decrypt = file_get_contents('crypt://' . $folder . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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$newFolder = '/newfolder' . time();
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$view->rename($folder, $newFolder);
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// Get file decrypted contents
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$newDecrypt = file_get_contents('crypt://' . $newFolder . $filename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
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$view->unlink($newFolder);
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}
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function testRenameFolder()
{
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$filename = '/tmp-' . time();
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$folder = '/folder';
$newFolder = '/newfolder';
$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->mkdir($folder);
// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $folder . $filename, $this->dataLong);
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// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
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$decrypt = file_get_contents('crypt://' . $folder . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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// rename folder
$view->rename($folder, $newFolder);
// Get file decrypted contents
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$newDecrypt = file_get_contents('crypt://' . $newFolder . $filename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
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$view->unlink($newFolder);
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}
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function testChangePassphrase()
{
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$filename = 'tmp-' . time();
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// Save long data as encrypted file using stream wrapper
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$cryptedFile = file_put_contents('crypt://' . $filename, $this->dataLong);
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// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
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$decrypt = file_get_contents('crypt://' . $filename);
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$this->assertEquals($this->dataLong, $decrypt);
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// change password
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\OC_User::setPassword($this->userId, 'test', null);
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// relogin
$params['uid'] = $this->userId;
$params['password'] = 'test';
OCA\Encryption\Hooks::login($params);
// Get file decrypted contents
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$newDecrypt = file_get_contents('crypt://' . $filename);
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$this->assertEquals($this->dataLong, $newDecrypt);
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// tear down
// change password back
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\OC_User::setPassword($this->userId, $this->pass);
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$view = new \OC\Files\View('/' . $this->userId . '/files');
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$view->unlink($filename);
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}
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function testViewFilePutAndGetContents()
{
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$filename = '/tmp-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
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$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
// Get file decrypted contents
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$decrypt = $view->file_get_contents($filename);
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$this->assertEquals($this->dataShort, $decrypt);
// Save long data as encrypted file using stream wrapper
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$cryptedFileLong = $view->file_put_contents($filename, $this->dataLong);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFileLong));
// Get file decrypted contents
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$decryptLong = $view->file_get_contents($filename);
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$this->assertEquals($this->dataLong, $decryptLong);
// tear down
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$view->unlink($filename);
}
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function testTouchExistingFile()
{
$filename = '/tmp-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
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$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
$view->touch($filename);
// Get file decrypted contents
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$decrypt = $view->file_get_contents($filename);
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$this->assertEquals($this->dataShort, $decrypt);
// tear down
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$view->unlink($filename);
}
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function testTouchFile()
{
$filename = '/tmp-' . time();
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$view = new \OC\Files\View('/' . $this->userId . '/files');
$view->touch($filename);
// Save short data as encrypted file using stream wrapper
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$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
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// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
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// Get file decrypted contents
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$decrypt = $view->file_get_contents($filename);
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$this->assertEquals($this->dataShort, $decrypt);
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// tear down
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$view->unlink($filename);
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}
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function testFopenFile()
{
$filename = '/tmp-' . time();
$view = new \OC\Files\View('/' . $this->userId . '/files');
// Save short data as encrypted file using stream wrapper
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$cryptedFile = $view->file_put_contents($filename, $this->dataShort);
// Test that data was successfully written
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$this->assertTrue(is_int($cryptedFile));
$handle = $view->fopen($filename, 'r');
// Get file decrypted contents
$decrypt = fgets($handle);
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$this->assertEquals($this->dataShort, $decrypt);
// tear down
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$view->unlink($filename);
}
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// function testEncryption(){
//
// $key=uniqid();
// $file=OC::$SERVERROOT.'/3rdparty/MDB2.php';
// $source=file_get_contents($file); //nice large text file
// $encrypted=OC_Encryption\Crypt::encrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::decrypt($encrypted,$key);
// $decrypted=rtrim($decrypted, "\0");
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// $this->assertNotEquals($encrypted,$source);
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// $this->assertEquals($decrypted,$source);
//
// $chunk=substr($source,0,8192);
// $encrypted=OC_Encryption\Crypt::encrypt($chunk,$key);
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// $this->assertEquals(strlen($chunk),strlen($encrypted));
// $decrypted=OC_Encryption\Crypt::decrypt($encrypted,$key);
// $decrypted=rtrim($decrypted, "\0");
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// $this->assertEquals($decrypted,$chunk);
//
// $encrypted=OC_Encryption\Crypt::blockEncrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::blockDecrypt($encrypted,$key);
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// $this->assertNotEquals($encrypted,$source);
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// $this->assertEquals($decrypted,$source);
//
// $tmpFileEncrypted=OCP\Files::tmpFile();
// OC_Encryption\Crypt::encryptfile($file,$tmpFileEncrypted,$key);
// $encrypted=file_get_contents($tmpFileEncrypted);
// $decrypted=OC_Encryption\Crypt::blockDecrypt($encrypted,$key);
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// $this->assertNotEquals($encrypted,$source);
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// $this->assertEquals($decrypted,$source);
//
// $tmpFileDecrypted=OCP\Files::tmpFile();
// OC_Encryption\Crypt::decryptfile($tmpFileEncrypted,$tmpFileDecrypted,$key);
// $decrypted=file_get_contents($tmpFileDecrypted);
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// $this->assertEquals($decrypted,$source);
//
// $file=OC::$SERVERROOT.'/core/img/weather-clear.png';
// $source=file_get_contents($file); //binary file
// $encrypted=OC_Encryption\Crypt::encrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::decrypt($encrypted,$key);
// $decrypted=rtrim($decrypted, "\0");
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// $this->assertEquals($decrypted,$source);
//
// $encrypted=OC_Encryption\Crypt::blockEncrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::blockDecrypt($encrypted,$key);
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// $this->assertEquals($decrypted,$source);
//
// }
//
// function testBinary(){
// $key=uniqid();
//
// $file=__DIR__.'/binary';
// $source=file_get_contents($file); //binary file
// $encrypted=OC_Encryption\Crypt::encrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::decrypt($encrypted,$key);
//
// $decrypted=rtrim($decrypted, "\0");
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// $this->assertEquals($decrypted,$source);
//
// $encrypted=OC_Encryption\Crypt::blockEncrypt($source,$key);
// $decrypted=OC_Encryption\Crypt::blockDecrypt($encrypted,$key,strlen($source));
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// $this->assertEquals($decrypted,$source);
// }
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}