167 lines
5.0 KiB
PHP
167 lines
5.0 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.org
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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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// Include PHPSecLib for passphrase manipulation functions
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require_once \OC::$SERVERROOT . '/' . '3rdparty' . '/' . 'phpseclib' . '/' . 'Math' . '/' . 'BigInteger.php';
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require_once \OC::$SERVERROOT . '/' . '3rdparty' . '/' . 'phpseclib' . '/' . 'Crypt' . '/' . 'Hash.php';
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require_once \OC::$SERVERROOT . '/' . '3rdparty' . '/' . 'phpseclib' . '/' . 'Crypt' . '/' . 'Random.php';
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require_once \OC::$SERVERROOT . '/' . '3rdparty' . '/' . 'phpseclib' . '/' . 'Crypt' . '/' . 'RSA.php';
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/**
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* Class for hook specific logic
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*/
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class Hooks {
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# TODO: use passphrase for encrypting private key that is separate to the login password
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/**
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* @brief Startup encryption backend upon user login
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* @note This method should never be called for users using client side encryption
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*/
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public static function login( $params ) {
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// if ( Crypt::mode( $params['uid'] ) == 'server' ) {
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# TODO: use lots of dependency injection here
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$view = new \OC_FilesystemView( '/' );
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$util = new Util( $view, $params['uid'] );
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if ( ! $util->ready() ) {
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\OC_Log::write( 'Encryption library', 'User account "' . $params['uid'] . '" is not ready for encryption; configuration started' , \OC_Log::DEBUG );
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return $util->setupServerSide( $params['password'] );
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}
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\OC_FileProxy::$enabled = false;
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$encryptedKey = Keymanager::getPrivateKey( $params['uid'], $view );
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\OC_FileProxy::$enabled = true;
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# TODO: dont manually encrypt the private keyfile - use the config options of openssl_pkey_export instead for better mobile compatibility
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//trigger_error( "\$encryptedKey = ".var_export($encryptedKey)." \n\n\$params['password'] = ".var_export($params['password'] ) );
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// trigger_error( "\$params['password'] = {$params['password']}" );
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$privateKey = Crypt::symmetricDecryptFileContent( $encryptedKey, $params['password'] );
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$session = new Session();
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$session->setPrivateKey( $privateKey, $params['uid'] );
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$view1 = new \OC_FilesystemView( '/' . $params['uid'] );
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// Set legacy encryption key if it exists, to support
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// depreciated encryption system
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if (
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$view1->file_exists( 'encryption.key' )
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&& $legacyKey = $view1->file_get_contents( 'encryption.key' )
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) {
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$_SESSION['legacyenckey'] = Crypt::legacyDecrypt( $legacyKey, $params['password'] );
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// trigger_error('leg enc key = '.$_SESSION['legacyenckey']);
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}
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// }
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return true;
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}
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/**
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* @brief Change a user's encryption passphrase
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* @param array $params keys: uid, password
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*/
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public static function setPassphrase( $params ) {
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// Only attempt to change passphrase if server-side encryption
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// is in use (client-side encryption does not have access to
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// the necessary keys)
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if ( Crypt::mode() == 'server' ) {
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$rsa = new \Crypt_RSA();
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// Load old passphrase
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$rsa->setPassword( $params['password'] );
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// Load user's private key
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$rsa->loadKey( $_SESSION['privateKey'] );
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// Set new passphrase
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$rsa->setPassword('new_password');
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// Get modified private key
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$privateKey = $rsa->getPrivateKey();
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// Save private key
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Keymanager::setPrivateKey( $privateKey );
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// Get modified public key
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$publicKey = $rsa->getPublicKey();
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// Save public key
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Keymanager::setPublicKey( $publicKey );
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# NOTE: Do we need to update session manually here or
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# will forced logout see to this?
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}
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}
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/**
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* @brief update the encryption key of the file uploaded by the client
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*/
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public static function updateKeyfile( $params ) {
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if ( Crypt::mode() == 'client' ) {
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if ( isset( $params['properties']['key'] ) ) {
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Keymanager::setFileKey( $params['path'], $params['properties']['key'] );
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} else {
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\OC_Log::write(
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'Encryption library', "Client side encryption is enabled but the client doesn't provide a encryption key for the file!"
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, \OC_Log::ERROR
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);
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error_log( "Client side encryption is enabled but the client doesn't provide an encryption key for the file!" );
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}
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}
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}
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}
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?>
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