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<?php
/**
* ownCloud
*
* @author Sam Tuke
* @copyright 2012 Sam Tuke samtuke@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\Encryption;
/**
* Class for handling encryption related session data
*/
class Session {
private $view;
/**
* @brief if session is started, check if ownCloud key pair is set up, if not create it
*
* The ownCloud key pair is used to allow public link sharing even if encryption is enabled
*/
public function __construct( $view ) {
$this->view = $view;
if ( ! $this->view->is_dir( 'owncloud_private_key' ) ) {
$this->view->mkdir( 'owncloud_private_key' );
}
$publicShareKeyId = \OC_Appconfig::getValue('files_encryption', 'publicShareKeyId');
if ($publicShareKeyId === null) {
$publicShareKeyId = substr(md5(time()),0,8);
\OC_Appconfig::setValue('files_encryption', 'publicShareKeyId', $publicShareKeyId);
}
if (
! $this->view->file_exists( "/public-keys/".$publicShareKeyId.".public.key" )
|| ! $this->view->file_exists( "/owncloud_private_key/".$publicShareKeyId.".private.key" )
) {
//FIXME: Bug: for some reason file_exists is returning
// false in above if statement, and causing new keys
// to be generated on each page load. At last check
// our app.php is being executed 18 times per page load
// , causing 18 new keypairs and huge performance hit.
$keypair = Crypt::createKeypair();
\OC_FileProxy::$enabled = false;
// Save public key
if (!$view->is_dir('/public-keys')) {
$view->mkdir('/public-keys');
}
$this->view->file_put_contents( '/public-keys/'.$publicShareKeyId.'.public.key', $keypair['publicKey'] );
// Encrypt private key empthy passphrase
$encryptedPrivateKey = Crypt::symmetricEncryptFileContent( $keypair['privateKey'], '' );
// Save private key
$this->view->file_put_contents( '/owncloud_private_key/'.$publicShareKeyId.'.private.key', $encryptedPrivateKey );
\OC_FileProxy::$enabled = true;
}
}
/**
* @brief Sets user private key to session
* @return bool
*
*/
public function setPrivateKey( $privateKey ) {
$_SESSION['privateKey'] = $privateKey;
return true;
}
/**
* @brief Gets user private key from session
* @returns string $privateKey The user's plaintext private key
*
*/
public function getPrivateKey() {
if (
isset( $_SESSION['privateKey'] )
&& !empty( $_SESSION['privateKey'] )
) {
return $_SESSION['privateKey'];
} else {
return false;
}
}
/**
* @brief Sets user legacy key to session
* @return bool
*
*/
public function setLegacyKey( $legacyKey ) {
if ( $_SESSION['legacyKey'] = $legacyKey ) {
return true;
}
}
/**
* @brief Gets user legacy key from session
* @returns string $legacyKey The user's plaintext legacy key
*
*/
public function getLegacyKey() {
if (
isset( $_SESSION['legacyKey'] )
&& !empty( $_SESSION['legacyKey'] )
) {
return $_SESSION['legacyKey'];
} else {
return false;
}
}
}
|
