<?php
  
  /**
   * Copyright (c) 2013, Bjoern Schiessle <schiessle@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or later.
   * See the COPYING-README file.
   *

   * Script to change recovery key password

   *
   */
  
  use OCA\Encryption;
  
  \OCP\JSON::checkLoggedIn();
  \OCP\JSON::checkAppEnabled('files_encryption');
  \OCP\JSON::callCheck();
  
  $l = OC_L10N::get('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.'))));

  }