175 lines
4.0 KiB
PHP
175 lines
4.0 KiB
PHP
<?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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class Session
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{
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private $view;
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/**
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* @brief if session is started, check if ownCloud key pair is set up, if not create it
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* @param \OC_FilesystemView $view
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*
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* @note The ownCloud key pair is used to allow public link sharing even if encryption is enabled
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*/
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public function __construct($view)
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{
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$this->view = $view;
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if (!$this->view->is_dir('owncloud_private_key')) {
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$this->view->mkdir('owncloud_private_key');
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}
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$publicShareKeyId = \OC_Appconfig::getValue('files_encryption', 'publicShareKeyId');
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if ($publicShareKeyId === null) {
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$publicShareKeyId = 'pubShare_' . substr(md5(time()), 0, 8);
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\OC_Appconfig::setValue('files_encryption', 'publicShareKeyId', $publicShareKeyId);
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}
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if (
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!$this->view->file_exists("/public-keys/" . $publicShareKeyId . ".public.key")
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|| !$this->view->file_exists("/owncloud_private_key/" . $publicShareKeyId . ".private.key")
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) {
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$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::$enabled = false;
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// Save public key
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if (!$view->is_dir('/public-keys')) {
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$view->mkdir('/public-keys');
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}
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$this->view->file_put_contents('/public-keys/' . $publicShareKeyId . '.public.key', $keypair['publicKey']);
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// Encrypt private key empthy passphrase
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$encryptedPrivateKey = Crypt::symmetricEncryptFileContent($keypair['privateKey'], '');
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// Save private key
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$this->view->file_put_contents('/owncloud_private_key/' . $publicShareKeyId . '.private.key', $encryptedPrivateKey);
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\OC_FileProxy::$enabled = $proxyStatus;
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}
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if (\OCP\USER::getUser() === false ||
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(isset($_GET['service']) && $_GET['service'] == 'files' &&
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isset($_GET['t']))) {
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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::$enabled = false;
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$encryptedKey = $this->view->file_get_contents('/owncloud_private_key/' . $publicShareKeyId . '.private.key');
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$privateKey = Crypt::symmetricDecryptFileContent($encryptedKey, '');
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$this->setPrivateKey($privateKey);
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\OC_FileProxy::$enabled = $proxyStatus;
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}
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}
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/**
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* @brief Sets user private key to session
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* @param string $privateKey
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* @return bool
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*/
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public function setPrivateKey($privateKey)
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{
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$_SESSION['privateKey'] = $privateKey;
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return true;
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}
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/**
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* @brief Gets user private key from session
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* @returns string $privateKey The user's plaintext private key
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*
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*/
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public function getPrivateKey()
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{
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if (
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isset($_SESSION['privateKey'])
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&& !empty($_SESSION['privateKey'])
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) {
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return $_SESSION['privateKey'];
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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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* @brief Sets user legacy key to session
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* @param $legacyKey
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* @return bool
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*/
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public function setLegacyKey($legacyKey)
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{
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$_SESSION['legacyKey'] = $legacyKey;
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return true;
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}
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/**
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* @brief Gets user legacy key from session
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* @returns string $legacyKey The user's plaintext legacy key
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*
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*/
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public function getLegacyKey()
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{
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if (
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isset($_SESSION['legacyKey'])
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&& !empty($_SESSION['legacyKey'])
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) {
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return $_SESSION['legacyKey'];
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} else {
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return false;
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}
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}
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} |