/**
* @brief Startup encryption backend upon user login
* @note This method should never be called for users using client side encryption
*/
public static function login($params)
{
$l = new \OC_L10N('files_encryption');
//check if all requirements are met
if (!Helper::checkRequirements()) {
$error_msg = $l->t("Missing requirements.");
$hint = $l->t('Please make sure that PHP 5.3.3 or newer is installed and that the OpenSSL PHP extension is enabled and configured properly. For now, the encryption app has been disabled.');
\OC_App::disable('files_encryption');
\OCP\Util::writeLog('Encryption library', $error_msg . ' ' . $hint, \OCP\Util::ERROR);
\OCP\Template::printErrorPage($error_msg, $hint);
}
$view = new \OC_FilesystemView('/');
// ensure filesystem is loaded
if (!\OC\Files\Filesystem::$loaded) {
\OC_Util::setupFS($params['uid']);
}
$util = new Util($view, $params['uid']);
// setup user, if user not ready force relogin
if (Helper::setupUser($util, $params['password']) === false) {
return false;
}
$encryptedKey = Keymanager::getPrivateKey($view, $params['uid']);
$privateKey = Crypt::decryptPrivateKey($encryptedKey, $params['password']);
if ($privateKey === false) {
\OCP\Util::writeLog('Encryption library', 'Private key for user "' . $params['uid'] . '" is not valid! Maybe the user password was changed from outside if so please change it back to gain access', \OCP\Util::ERROR);
}
$session = new \OCA\Encryption\Session($view);
$session->setPrivateKey($privateKey);
// Check if first-run file migration has already been performed
$ready = false;
if ($util->getMigrationStatus() === Util::MIGRATION_OPEN) {
$ready = $util->beginMigration();
}
// If migration not yet done
if ($ready) {
$userView = new \OC_FilesystemView('/' . $params['uid']);
// Set legacy encryption key if it exists, to support
// depreciated encryption system
if ($userView->file_exists('encryption.key') && ($encLegacyKey = $userView->file_get_contents('encryption.key'))) {
$plainLegacyKey = Crypt::legacyDecrypt($encLegacyKey, $params['password']);
$session->setLegacyKey($plainLegacyKey);
}
// Encrypt existing user files:
// This serves to upgrade old versions of the encryption
// app (see appinfo/spec.txt)
if ($util->encryptAll('/' . $params['uid'] . '/' . 'files', $session->getLegacyKey(), $params['password'])) {
\OC_Log::write('Encryption library', 'Encryption of existing files belonging to "' . $params['uid'] . '" completed', \OC_Log::INFO);
}
// Register successful migration in DB
$util->finishMigration();
}
return true;
}
/**
* decrypt private key and add it to the current session
* @param array $params with 'uid' and 'password'
* @return mixed session or false
*/
public function initEncryption($params)
{
$session = new \OCA\Encryption\Session($this->view);
// we tried to initialize the encryption app for this session
$session->setInitialized(\OCA\Encryption\Session::INIT_EXECUTED);
$encryptedKey = Keymanager::getPrivateKey($this->view, $params['uid']);
$privateKey = Crypt::decryptPrivateKey($encryptedKey, $params['password']);
if ($privateKey === false) {
\OCP\Util::writeLog('Encryption library', 'Private key for user "' . $params['uid'] . '" is not valid! Maybe the user password was changed from outside if so please change it back to gain access', \OCP\Util::ERROR);
return false;
}
$session->setPrivateKey($privateKey);
$session->setInitialized(\OCA\Encryption\Session::INIT_SUCCESSFUL);
return $session;
}
\OCP\JSON::checkAppEnabled('files_encryption');
\OCP\JSON::callCheck();
$l = \OC::$server->getL10N('core');
$return = false;
$oldPassword = $_POST['oldPassword'];
$newPassword = $_POST['newPassword'];
$view = new \OC\Files\View('/');
$session = new \OCA\Encryption\Session($view);
$user = \OCP\User::getUser();
$proxyStatus = \OC_FileProxy::$enabled;
\OC_FileProxy::$enabled = false;
$keyPath = '/' . $user . '/files_encryption/' . $user . '.private.key';
$encryptedKey = $view->file_get_contents($keyPath);
$decryptedKey = \OCA\Encryption\Crypt::decryptPrivateKey($encryptedKey, $oldPassword);
if ($decryptedKey) {
$cipher = \OCA\Encryption\Helper::getCipher();
$encryptedKey = \OCA\Encryption\Crypt::symmetricEncryptFileContent($decryptedKey, $newPassword, $cipher);
if ($encryptedKey) {
\OCA\Encryption\Keymanager::setPrivateKey($encryptedKey, $user);
$session->setPrivateKey($decryptedKey);
$return = true;
}
}
\OC_FileProxy::$enabled = $proxyStatus;
// success or failure
if ($return) {
$session->setInitialized(\OCA\Encryption\Session::INIT_SUCCESSFUL);
\OCP\JSON::success(array('data' => array('message' => $l->t('Private key password successfully updated.'))));
} else {
\OCP\JSON::error(array('data' => array('message' => $l->t('Could not update the private key password. Maybe the old password was not correct.'))));
}