2012-12-11 19:10:56 +04:00
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<?php
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/**
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* ownCloud
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*
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* @author Sam Tuke
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* @copyright 2012 Sam Tuke samtuke@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\Encryption;
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/**
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* Class for handling encryption related session data
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*/
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2013-05-27 19:26:58 +04:00
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class Session {
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2013-04-09 21:11:38 +04:00
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private $view;
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2013-05-20 03:24:36 +04:00
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2013-09-06 14:27:40 +04:00
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const NOT_INITIALIZED = '0';
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const INIT_EXECUTED = '1';
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const INIT_SUCCESSFUL = '2';
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2013-02-13 20:57:45 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* if session is started, check if ownCloud key pair is set up, if not create it
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2014-05-12 18:30:39 +04:00
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* @param \OC\Files\View $view
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2013-05-20 03:24:36 +04:00
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*
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* @note The ownCloud key pair is used to allow public link sharing even if encryption is enabled
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2013-02-13 20:57:45 +04:00
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*/
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2013-05-27 19:26:58 +04:00
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public function __construct($view) {
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2013-05-20 03:24:36 +04:00
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2013-04-09 21:11:38 +04:00
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$this->view = $view;
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2013-04-10 18:46:02 +04:00
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2013-05-27 19:26:58 +04:00
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if (!$this->view->is_dir('owncloud_private_key')) {
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2013-05-20 03:24:36 +04:00
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2013-05-27 19:26:58 +04:00
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$this->view->mkdir('owncloud_private_key');
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2013-04-10 18:46:02 +04:00
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2013-02-13 20:57:45 +04:00
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}
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2013-05-13 17:15:35 +04:00
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2014-02-13 19:28:49 +04:00
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$appConfig = \OC::$server->getAppConfig();
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$publicShareKeyId = $appConfig->getValue('files_encryption', 'publicShareKeyId');
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2013-05-13 17:15:35 +04:00
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2013-05-27 19:26:58 +04:00
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if ($publicShareKeyId === null) {
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$publicShareKeyId = 'pubShare_' . substr(md5(time()), 0, 8);
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2014-02-13 19:28:49 +04:00
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$appConfig->setValue('files_encryption', 'publicShareKeyId', $publicShareKeyId);
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2013-05-13 17:15:35 +04:00
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}
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2013-05-20 03:24:36 +04:00
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if (
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2013-05-27 19:26:58 +04:00
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!$this->view->file_exists("/public-keys/" . $publicShareKeyId . ".public.key")
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|| !$this->view->file_exists("/owncloud_private_key/" . $publicShareKeyId . ".private.key")
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2013-04-09 21:11:38 +04:00
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) {
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2013-05-20 03:24:36 +04:00
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$keypair = Crypt::createKeypair();
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// Disable encryption proxy to prevent recursive calls
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$proxyStatus = \OC_FileProxy::$enabled;
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\OC_FileProxy::$enabled = false;
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// Save public key
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2013-05-27 19:26:58 +04:00
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if (!$view->is_dir('/public-keys')) {
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$view->mkdir('/public-keys');
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2013-05-20 03:24:36 +04:00
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}
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2013-05-27 19:26:58 +04:00
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$this->view->file_put_contents('/public-keys/' . $publicShareKeyId . '.public.key', $keypair['publicKey']);
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2013-05-20 03:24:36 +04:00
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2013-05-24 01:56:31 +04:00
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// Encrypt private key empty passphrase
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2014-07-21 15:02:28 +04:00
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$cipher = \OCA\Encryption\Helper::getCipher();
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$encryptedKey = \OCA\Encryption\Crypt::symmetricEncryptFileContent($keypair['privateKey'], '', $cipher);
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if ($encryptedKey) {
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Keymanager::setPrivateSystemKey($encryptedKey, $publicShareKeyId . '.private.key');
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} else {
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\OCP\Util::writeLog('files_encryption', 'Could not create public share keys', \OCP\Util::ERROR);
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}
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2013-05-20 03:24:36 +04:00
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2013-05-13 23:24:59 +04:00
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\OC_FileProxy::$enabled = $proxyStatus;
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2013-05-20 03:24:36 +04:00
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2013-02-13 20:57:45 +04:00
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}
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2013-05-13 23:24:59 +04:00
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2013-05-28 11:27:04 +04:00
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if (\OCA\Encryption\Helper::isPublicAccess()) {
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2013-05-20 03:24:36 +04:00
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// Disable encryption proxy to prevent recursive calls
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$proxyStatus = \OC_FileProxy::$enabled;
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\OC_FileProxy::$enabled = false;
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2013-05-13 23:24:59 +04:00
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2013-06-03 20:42:13 +04:00
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$encryptedKey = $this->view->file_get_contents(
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'/owncloud_private_key/' . $publicShareKeyId . '.private.key');
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2013-06-03 16:19:31 +04:00
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$privateKey = Crypt::decryptPrivateKey($encryptedKey, '');
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2013-06-03 20:42:13 +04:00
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$this->setPublicSharePrivateKey($privateKey);
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2013-05-13 23:24:59 +04:00
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2014-05-20 19:54:14 +04:00
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$this->setInitialized(\OCA\Encryption\Session::INIT_SUCCESSFUL);
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2013-05-20 03:24:36 +04:00
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\OC_FileProxy::$enabled = $proxyStatus;
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}
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2013-02-13 20:57:45 +04:00
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}
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2012-12-11 19:10:56 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Sets user private key to session
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2013-05-20 00:31:00 +04:00
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* @param string $privateKey
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2012-12-11 19:10:56 +04:00
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* @return bool
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2013-05-28 11:27:04 +04:00
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*
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* @note this should only be set on login
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2012-12-11 19:10:56 +04:00
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*/
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2013-05-27 19:26:58 +04:00
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public function setPrivateKey($privateKey) {
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2013-05-20 03:24:36 +04:00
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2013-05-28 03:31:26 +04:00
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\OC::$session->set('privateKey', $privateKey);
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2013-05-20 03:24:36 +04:00
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2012-12-11 19:10:56 +04:00
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return true;
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2013-05-20 03:24:36 +04:00
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2012-12-11 19:10:56 +04:00
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}
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2013-05-20 03:24:36 +04:00
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2014-08-07 17:26:09 +04:00
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/**
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* remove keys from session
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*/
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public function removeKeys() {
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\OC::$session->remove('publicSharePrivateKey');
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\OC::$session->remove('privateKey');
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}
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2013-09-02 13:26:11 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Sets status of encryption app
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2014-05-16 00:47:28 +04:00
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* @param string $init INIT_SUCCESSFUL, INIT_EXECUTED, NOT_INITIALIZED
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2013-09-02 13:26:11 +04:00
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* @return bool
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2013-09-06 14:27:40 +04:00
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*
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2013-09-02 13:34:28 +04:00
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* @note this doesn not indicate of the init was successful, we just remeber the try!
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2013-09-02 13:26:11 +04:00
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*/
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public function setInitialized($init) {
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\OC::$session->set('encryptionInitialized', $init);
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return true;
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}
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2014-02-26 20:18:38 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* remove encryption keys and init status from session
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2014-02-26 20:18:38 +04:00
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*/
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public function closeSession() {
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\OC::$session->remove('encryptionInitialized');
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\OC::$session->remove('privateKey');
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}
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2013-09-02 13:26:11 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Gets status if we already tried to initialize the encryption app
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2014-05-13 15:29:25 +04:00
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* @return string init status INIT_SUCCESSFUL, INIT_EXECUTED, NOT_INITIALIZED
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2013-09-02 13:26:11 +04:00
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*
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2013-09-02 13:34:28 +04:00
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* @note this doesn not indicate of the init was successful, we just remeber the try!
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2013-09-02 13:26:11 +04:00
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*/
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public function getInitialized() {
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if (!is_null(\OC::$session->get('encryptionInitialized'))) {
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return \OC::$session->get('encryptionInitialized');
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} else {
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2013-09-06 14:27:40 +04:00
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return self::NOT_INITIALIZED;
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2013-09-02 13:26:11 +04:00
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}
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}
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2012-12-11 19:10:56 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Gets user or public share private key from session
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2014-05-13 14:36:01 +04:00
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* @return string $privateKey The user's plaintext private key
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2012-12-11 19:10:56 +04:00
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*
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*/
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2013-05-24 01:56:31 +04:00
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public function getPrivateKey() {
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2013-05-28 11:27:04 +04:00
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// return the public share private key if this is a public access
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if (\OCA\Encryption\Helper::isPublicAccess()) {
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return $this->getPublicSharePrivateKey();
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} else {
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2013-06-03 20:42:13 +04:00
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if (!is_null(\OC::$session->get('privateKey'))) {
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2013-05-28 16:55:42 +04:00
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return \OC::$session->get('privateKey');
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2013-05-28 11:27:04 +04:00
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} else {
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return false;
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}
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}
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}
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2013-05-20 03:24:36 +04:00
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2013-05-28 11:27:04 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Sets public user private key to session
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2013-05-28 11:27:04 +04:00
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* @param string $privateKey
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* @return bool
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*/
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public function setPublicSharePrivateKey($privateKey) {
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2013-05-20 03:24:36 +04:00
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2013-06-03 20:42:13 +04:00
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\OC::$session->set('publicSharePrivateKey', $privateKey);
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2013-05-20 03:24:36 +04:00
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2013-05-28 11:27:04 +04:00
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return true;
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2013-05-20 03:24:36 +04:00
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2013-05-28 11:27:04 +04:00
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}
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2013-05-20 03:24:36 +04:00
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2013-05-28 11:27:04 +04:00
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/**
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2014-05-19 19:50:53 +04:00
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* Gets public share private key from session
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2014-05-13 14:36:01 +04:00
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* @return string $privateKey
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2013-05-28 11:27:04 +04:00
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*
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*/
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public function getPublicSharePrivateKey() {
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2013-05-20 03:24:36 +04:00
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2013-06-03 20:42:13 +04:00
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if (!is_null(\OC::$session->get('publicSharePrivateKey'))) {
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2013-05-28 19:06:37 +04:00
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return \OC::$session->get('publicSharePrivateKey');
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2013-05-28 11:27:04 +04:00
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} else {
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return false;
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2012-12-11 19:10:56 +04:00
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}
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}
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2013-05-20 03:24:36 +04:00
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2013-05-28 03:04:09 +04:00
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}
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