function testBinary()
{
$key = uniqid();
$file = __DIR__ . '/binary';
$source = file_get_contents($file);
//binary file
$encrypted = OC_Crypt::encrypt($source, $key);
$decrypted = OC_Crypt::decrypt($encrypted, $key);
$decrypted = rtrim($decrypted, "");
$this->assertEqual($decrypted, $source);
$encrypted = OC_Crypt::blockEncrypt($source, $key);
$decrypted = OC_Crypt::blockDecrypt($encrypted, $key, strlen($source));
$this->assertEqual($decrypted, $source);
}
public static function changekeypasscode($newpasscode)
{
if (OC_User::isLoggedIn()) {
$username = OC_USER::getUser();
// read old key
$key = file_get_contents(OC_Config::getValue("datadirectory") . '/' . $username . '/encryption.key');
// decrypt key with old passcode
$key = OC_Crypt::decrypt($key, $_SESSION['user_password']);
// encrypt again with new passcode
$key = OC_Crypt::encrypt($key, $newpassword);
// store the new key
file_put_contents(OC_Config::getValue("datadirectory") . '/' . $username . '/encryption.key', $key);
$_SESSION['user_password'] = $newpasscode;
}
}
function testEncryption()
{
$key = uniqid();
$file = OC::$SERVERROOT . '/3rdparty/MDB2.php';
$source = file_get_contents($file);
//nice large text file
$encrypted = OC_Crypt::encrypt($source, $key);
$decrypted = OC_Crypt::decrypt($encrypted, $key);
$this->assertNotEqual($encrypted, $source);
$this->assertEqual($decrypted, $source);
$chunk = substr($source, 0, 8192);
$encrypted = OC_Crypt::encrypt($chunk, $key);
$this->assertEqual(strlen($chunk), strlen($encrypted));
$decrypted = OC_Crypt::decrypt($encrypted, $key);
$this->assertEqual($decrypted, $chunk);
$encrypted = OC_Crypt::blockEncrypt($source, $key);
$decrypted = OC_Crypt::blockDecrypt($encrypted, $key);
$this->assertNotEqual($encrypted, $source);
$this->assertEqual($decrypted, $source);
$tmpFileEncrypted = OCP\Files::tmpFile();
OC_Crypt::encryptfile($file, $tmpFileEncrypted, $key);
$encrypted = file_get_contents($tmpFileEncrypted);
$decrypted = OC_Crypt::blockDecrypt($encrypted, $key);
$this->assertNotEqual($encrypted, $source);
$this->assertEqual($decrypted, $source);
$tmpFileDecrypted = OCP\Files::tmpFile();
OC_Crypt::decryptfile($tmpFileEncrypted, $tmpFileDecrypted, $key);
$decrypted = file_get_contents($tmpFileDecrypted);
$this->assertEqual($decrypted, $source);
$file = OC::$SERVERROOT . '/core/img/weather-clear.png';
$source = file_get_contents($file);
//binary file
$encrypted = OC_Crypt::encrypt($source, $key);
$decrypted = OC_Crypt::decrypt($encrypted, $key);
$this->assertEqual($decrypted, $source);
$encrypted = OC_Crypt::blockEncrypt($source, $key);
$decrypted = OC_Crypt::blockDecrypt($encrypted, $key);
$this->assertEqual($decrypted, $source);
}
public function stream_write($data)
{
$length = strlen($data);
$written = 0;
$currentPos = ftell($this->source);
if ($this->writeCache) {
$data = $this->writeCache . $data;
$this->writeCache = '';
}
if ($currentPos % 8192 != 0) {
//make sure we always start on a block start
fseek($this->source, -($currentPos % 8192), SEEK_CUR);
$encryptedBlock = fread($this->source, 8192);
fseek($this->source, -($currentPos % 8192), SEEK_CUR);
$block = OC_Crypt::decrypt($encryptedBlock);
$data = substr($block, 0, $currentPos % 8192) . $data;
fseek($this->source, -($currentPos % 8192), SEEK_CUR);
}
while (strlen($data) > 0) {
if (strlen($data) < 8192) {
$this->writeCache = $data;
$data = '';
} else {
$encrypted = OC_Crypt::encrypt(substr($data, 0, 8192));
fwrite($this->source, $encrypted);
$data = substr($data, 8192);
}
}
return $length;
}
public static function changekeypasscode($oldPassword, $newPassword)
{
if (OCP\User::isLoggedIn()) {
$username = OCP\USER::getUser();
$view = new OC_FilesystemView('/' . $username);
// read old key
$key = $view->file_get_contents('/encryption.key');
// decrypt key with old passcode
$key = OC_Crypt::decrypt($key, $oldPassword);
// encrypt again with new passcode
$key = OC_Crypt::encrypt($key, $newPassword);
// store the new key
$view->file_put_contents('/encryption.key', $key);
}
}
