2012-08-16 22:18:18 +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 Robin Appelman
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2012-12-12 21:39:43 +04:00
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* @copyright 2012 Sam Tuke <samtuke@owncloud.com>, 2011 Robin Appelman
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* <icewind1991@gmail.com>
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2012-08-16 22:18:18 +04:00
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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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/**
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* transparently encrypted filestream
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*
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* you can use it as wrapper around an existing stream by setting CryptStream::$sourceStreams['foo']=array('path'=>$path,'stream'=>$stream)
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2012-12-12 21:39:43 +04:00
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* and then fopen('crypt://streams/foo');
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2012-08-16 22:18:18 +04:00
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*/
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2012-10-17 19:35:19 +04:00
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namespace OCA\Encryption;
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2012-08-16 22:18:18 +04:00
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2012-10-10 21:40:59 +04:00
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/**
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* @brief Provides 'crypt://' stream wrapper protocol.
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2012-11-16 22:31:37 +04:00
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* @note We use a stream wrapper because it is the most secure way to handle
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* decrypted content transfers. There is no safe way to decrypt the entire file
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* somewhere on the server, so we have to encrypt and decrypt blocks on the fly.
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* @note Paths used with this protocol MUST BE RELATIVE. Use URLs like:
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* crypt://filename, or crypt://subdirectory/filename, NOT
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2012-12-12 21:39:43 +04:00
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* crypt:///home/user/owncloud/data. Otherwise keyfiles will be put in
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2012-11-16 22:31:37 +04:00
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* [owncloud]/data/user/files_encryption/keyfiles/home/user/owncloud/data and
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2012-12-12 21:39:43 +04:00
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* will not be accessible to other methods.
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2012-11-16 22:31:37 +04:00
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* @note Data read and written must always be 8192 bytes long, as this is the
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* buffer size used internally by PHP. The encryption process makes the input
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* data longer, and input is chunked into smaller pieces in order to result in
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* a 8192 encrypted block size.
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2013-04-16 20:29:22 +04:00
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* @note When files are deleted via webdav, or when they are updated and the
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* previous version deleted, this is handled by OC\Files\View, and thus the
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* encryption proxies are used and keyfiles deleted.
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2012-10-10 21:40:59 +04:00
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*/
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2012-08-16 22:18:18 +04:00
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class Stream {
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public static $sourceStreams = array();
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2012-09-11 16:40:45 +04:00
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2013-01-24 22:37:34 +04:00
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// TODO: make all below properties private again once unit testing is
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// configured correctly
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2013-04-12 16:30:02 +04:00
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public $rawPath; // The raw path relative to the data dir
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2013-04-12 16:13:38 +04:00
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public $relPath; // rel path to users file dir
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2012-11-16 22:31:37 +04:00
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private $userId;
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2012-09-11 16:40:45 +04:00
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private $handle; // Resource returned by fopen
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2012-08-16 22:18:18 +04:00
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private $path;
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private $readBuffer; // For streams that dont support seeking
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private $meta = array(); // Header / meta for source stream
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private $count;
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private $writeCache;
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2012-09-11 16:40:45 +04:00
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public $size;
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2012-12-11 19:10:56 +04:00
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private $publicKey;
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2012-08-23 19:43:10 +04:00
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private $keyfile;
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2012-12-11 19:10:56 +04:00
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private $encKeyfile;
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2013-01-05 21:12:23 +04:00
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private static $view; // a fsview object set to user dir
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private $rootView; // a fsview object set to '/'
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2012-08-16 22:18:18 +04:00
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public function stream_open( $path, $mode, $options, &$opened_path ) {
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2012-11-14 17:58:57 +04:00
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2013-03-09 22:18:34 +04:00
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$this->userId = \OCP\User::getUser();
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2012-08-16 22:18:18 +04:00
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2013-03-09 22:18:34 +04:00
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if ( ! isset( $this->rootView ) ) {
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2013-01-05 21:12:23 +04:00
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2013-03-09 22:18:34 +04:00
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$this->rootView = new \OC_FilesystemView( '/' );
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2013-01-05 21:12:23 +04:00
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}
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2013-03-04 20:58:56 +04:00
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2013-04-12 16:30:02 +04:00
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// Strip identifier text from path, this gives us the path relative to data/<user>/files
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$this->relPath = str_replace( 'crypt://', '', $path );
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2012-08-23 19:43:10 +04:00
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2013-04-12 16:30:02 +04:00
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// rawPath is relative to the data directory
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$this->rawPath = $this->userId . '/files/' . $this->relPath;
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2012-11-16 22:31:37 +04:00
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2012-08-16 22:18:18 +04:00
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if (
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2013-03-09 22:18:34 +04:00
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dirname( $this->rawPath ) == 'streams'
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and isset( self::$sourceStreams[basename( $this->rawPath )] )
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2012-08-16 22:18:18 +04:00
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) {
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2012-09-11 16:40:45 +04:00
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// Is this just for unit testing purposes?
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2012-08-16 22:18:18 +04:00
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2013-03-09 22:18:34 +04:00
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$this->handle = self::$sourceStreams[basename( $this->rawPath )]['stream'];
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2012-08-16 22:18:18 +04:00
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2013-03-09 22:18:34 +04:00
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$this->path = self::$sourceStreams[basename( $this->rawPath )]['path'];
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2012-08-16 22:18:18 +04:00
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2013-03-09 22:18:34 +04:00
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$this->size = self::$sourceStreams[basename( $this->rawPath )]['size'];
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2012-08-16 22:18:18 +04:00
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} else {
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if (
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$mode == 'w'
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or $mode == 'w+'
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or $mode == 'wb'
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or $mode == 'wb+'
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) {
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2013-03-09 22:18:34 +04:00
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// We're writing a new file so start write counter with 0 bytes
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2012-08-16 22:18:18 +04:00
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$this->size = 0;
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} else {
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2012-10-17 19:35:19 +04:00
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2013-04-12 16:13:38 +04:00
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$this->size = $this->rootView->filesize( $this->rawPath, $mode );
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2012-10-17 19:35:19 +04:00
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2013-03-09 22:18:34 +04:00
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//$this->size = filesize( $this->rawPath );
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2012-09-11 16:40:45 +04:00
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2012-08-16 22:18:18 +04:00
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}
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// Disable fileproxies so we can open the source file without recursive encryption
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\OC_FileProxy::$enabled = false;
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2013-03-09 22:18:34 +04:00
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//$this->handle = fopen( $this->rawPath, $mode );
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2012-09-11 16:40:45 +04:00
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2013-04-12 16:13:38 +04:00
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$this->handle = $this->rootView->fopen( $this->rawPath, $mode );
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2012-10-17 19:35:19 +04:00
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2012-08-16 22:18:18 +04:00
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\OC_FileProxy::$enabled = true;
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2013-03-09 22:18:34 +04:00
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if ( ! is_resource( $this->handle ) ) {
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2012-08-16 22:18:18 +04:00
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2013-04-12 16:13:38 +04:00
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\OCP\Util::writeLog( 'files_encryption', 'failed to open file "' . $this->rawPath . '"', \OCP\Util::ERROR );
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2012-08-16 22:18:18 +04:00
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2013-03-09 22:18:34 +04:00
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} else {
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$this->meta = stream_get_meta_data( $this->handle );
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2012-08-16 22:18:18 +04:00
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}
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}
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2012-09-11 16:40:45 +04:00
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return is_resource( $this->handle );
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2012-08-16 22:18:18 +04:00
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}
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2012-09-11 16:40:45 +04:00
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public function stream_seek( $offset, $whence = SEEK_SET ) {
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2012-08-16 22:18:18 +04:00
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$this->flush();
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2012-09-11 16:40:45 +04:00
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fseek( $this->handle, $offset, $whence );
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2012-08-16 22:18:18 +04:00
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}
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public function stream_tell() {
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2012-09-11 16:40:45 +04:00
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return ftell($this->handle);
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2012-08-16 22:18:18 +04:00
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}
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2012-08-23 19:43:10 +04:00
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public function stream_read( $count ) {
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2012-09-11 16:40:45 +04:00
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2012-08-23 19:43:10 +04:00
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$this->writeCache = '';
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if ( $count != 8192 ) {
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2012-10-16 18:02:51 +04:00
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2012-08-23 19:43:10 +04:00
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// $count will always be 8192 https://bugs.php.net/bug.php?id=21641
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// This makes this function a lot simpler, but will break this class if the above 'bug' gets 'fixed'
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2013-02-09 21:01:38 +04:00
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\OCP\Util::writeLog( 'files_encryption', 'PHP "bug" 21641 no longer holds, decryption system requires refactoring', \OCP\Util::FATAL );
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2012-08-23 19:43:10 +04:00
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2012-08-16 22:18:18 +04:00
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die();
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2012-08-23 19:43:10 +04:00
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2012-08-16 22:18:18 +04:00
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}
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2012-08-23 19:43:10 +04:00
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2012-09-11 16:40:45 +04:00
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// $pos = ftell( $this->handle );
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//
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2012-10-17 19:35:19 +04:00
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// Get the data from the file handle
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$data = fread( $this->handle, 8192 );
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2013-04-16 20:29:22 +04:00
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$result = '';
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2013-01-06 22:38:35 +04:00
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2012-11-16 22:31:37 +04:00
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if ( strlen( $data ) ) {
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2012-09-11 16:40:45 +04:00
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2013-04-16 20:29:22 +04:00
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if ( ! $this->getKey() ) {
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// Error! We don't have a key to decrypt the file with
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throw new \Exception( 'Encryption key not found for "' . $this->rawPath . '" during attempted read via stream' );
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2012-09-11 16:40:45 +04:00
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2013-04-16 20:29:22 +04:00
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}
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// Decrypt data
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$result = Crypt::symmetricDecryptFileContent( $data, $this->plainKey );
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2012-09-11 16:40:45 +04:00
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2012-11-16 22:31:37 +04:00
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}
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2012-08-23 19:43:10 +04:00
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2012-09-11 16:40:45 +04:00
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// $length = $this->size - $pos;
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//
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// if ( $length < 8192 ) {
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//
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// $result = substr( $result, 0, $length );
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//
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// }
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2012-08-23 19:43:10 +04:00
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2012-08-16 22:18:18 +04:00
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return $result;
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2012-08-23 19:43:10 +04:00
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}
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2012-10-16 18:02:51 +04:00
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/**
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2013-02-09 21:01:38 +04:00
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* @brief Encrypt and pad data ready for writing to disk
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2012-10-16 18:02:51 +04:00
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* @param string $plainData data to be encrypted
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* @param string $key key to use for encryption
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* @return encrypted data on success, false on failure
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*/
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public function preWriteEncrypt( $plainData, $key ) {
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// Encrypt data to 'catfile', which includes IV
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2012-10-17 19:35:19 +04:00
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if ( $encrypted = Crypt::symmetricEncryptFileContent( $plainData, $key ) ) {
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2012-10-16 18:02:51 +04:00
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2012-10-17 19:35:19 +04:00
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return $encrypted;
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2012-10-16 18:02:51 +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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2012-08-23 19:43:10 +04:00
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/**
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2013-04-17 19:20:37 +04:00
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* @brief Fetch the plain encryption key for the file and set it as plainKey property
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2012-09-11 16:40:45 +04:00
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* @param bool $generate if true, a new key will be generated if none can be found
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2012-10-16 18:02:51 +04:00
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* @return bool true on key found and set, false on key not found and new key generated and set
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2012-08-23 19:43:10 +04:00
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*/
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2012-12-11 19:10:56 +04:00
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public function getKey() {
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2012-08-23 19:43:10 +04:00
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2013-04-16 20:29:22 +04:00
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// Check if key is already set
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if ( isset( $this->plainKey ) && isset( $this->encKeyfile ) ) {
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return true;
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}
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2012-10-10 21:40:59 +04:00
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2013-04-16 20:29:22 +04:00
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// Avoid problems with .part file extensions
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$this->relPath = Keymanager::fixPartialFilePath( $this->relPath );
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// If a keyfile already exists
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if ( $this->rootView->file_exists( $this->userId . '/'. 'files_encryption' . '/' . 'keyfiles' . '/' . $this->relPath . '.key' ) ) {
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2012-09-11 16:40:45 +04:00
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2013-04-16 20:29:22 +04:00
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// Fetch and decrypt keyfile
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2012-10-10 21:40:59 +04:00
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// Fetch existing keyfile
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2013-04-12 16:13:38 +04:00
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$this->encKeyfile = Keymanager::getFileKey( $this->rootView, $this->userId, $this->relPath );
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2012-12-11 19:10:56 +04:00
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2013-04-16 16:50:20 +04:00
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$this->setUserProperty();
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2012-12-11 19:10:56 +04:00
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2013-04-10 19:37:03 +04:00
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$session = new Session( $this->rootView );
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2012-12-11 19:10:56 +04:00
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2013-01-02 23:29:22 +04:00
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$privateKey = $session->getPrivateKey( $this->userId );
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2013-04-16 16:50:20 +04:00
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$shareKey = Keymanager::getShareKey( $this->rootView, $this->userId, $this->relPath );
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2013-04-16 20:29:22 +04:00
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$this->plainKey = Crypt::multiKeyDecrypt( $this->encKeyfile, $shareKey, $privateKey );
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2013-04-17 19:20:37 +04:00
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// trigger_error( '$this->relPath = '.$this->relPath );
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// trigger_error( '$this->userId = '.$this->userId);
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// trigger_error( '$this->encKeyfile = '.$this->encKeyfile );
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// trigger_error( '$this->plainKey1 = '.var_export($this->plainKey, 1));
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2012-08-23 19:43:10 +04:00
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2012-10-16 18:02:51 +04:00
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return true;
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2012-08-23 19:43:10 +04:00
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} else {
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2013-04-16 20:29:22 +04:00
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2012-12-11 19:10:56 +04:00
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return false;
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}
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}
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2013-04-16 16:50:20 +04:00
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public function setUserProperty() {
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2012-12-11 19:10:56 +04:00
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// Only get the user again if it isn't already set
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if ( empty( $this->userId ) ) {
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2013-01-24 22:37:34 +04:00
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// TODO: Move this user call out of here - it belongs
|
|
|
|
// elsewhere
|
2012-12-11 19:10:56 +04:00
|
|
|
$this->userId = \OCP\User::getUser();
|
|
|
|
|
2012-08-23 19:43:10 +04:00
|
|
|
}
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// TODO: Add a method for getting the user in case OCP\User::
|
|
|
|
// getUser() doesn't work (can that scenario ever occur?)
|
2012-12-11 19:10:56 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2012-10-16 18:02:51 +04:00
|
|
|
* @brief Handle plain data from the stream, and write it in 8192 byte blocks
|
2012-10-10 21:40:59 +04:00
|
|
|
* @param string $data data to be written to disk
|
|
|
|
* @note the data will be written to the path stored in the stream handle, set in stream_open()
|
2012-10-16 18:02:51 +04:00
|
|
|
* @note $data is only ever be a maximum of 8192 bytes long. This is set by PHP internally. stream_write() is called multiple times in a loop on data larger than 8192 bytes
|
|
|
|
* @note Because the encryption process used increases the length of $data, a writeCache is used to carry over data which would not fit in the required block size
|
|
|
|
* @note Padding is added to each encrypted block to ensure that the resulting block is exactly 8192 bytes. This is removed during stream_read
|
|
|
|
* @note PHP automatically updates the file pointer after writing data to reflect it's length. There is generally no need to update the poitner manually using fseek
|
2012-08-16 22:18:18 +04:00
|
|
|
*/
|
|
|
|
public function stream_write( $data ) {
|
2013-01-02 23:29:22 +04:00
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// Disable the file proxies so that encryption is not
|
|
|
|
// automatically attempted when the file is written to disk -
|
|
|
|
// we are handling that separately here and we don't want to
|
|
|
|
// get into an infinite loop
|
2012-08-23 19:43:10 +04:00
|
|
|
\OC_FileProxy::$enabled = false;
|
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
// Get the length of the unencrypted data that we are handling
|
2012-08-16 22:18:18 +04:00
|
|
|
$length = strlen( $data );
|
2012-10-10 21:40:59 +04:00
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
// So far this round, no data has been written
|
2012-08-16 22:18:18 +04:00
|
|
|
$written = 0;
|
2012-10-16 18:02:51 +04:00
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// Find out where we are up to in the writing of data to the
|
|
|
|
// file
|
2012-10-10 21:40:59 +04:00
|
|
|
$pointer = ftell( $this->handle );
|
|
|
|
|
2012-12-11 19:10:56 +04:00
|
|
|
// Make sure the userId is set
|
2013-04-16 20:29:22 +04:00
|
|
|
$this->setUserProperty();
|
2012-08-16 22:18:18 +04:00
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
// Get / generate the keyfile for the file we're handling
|
2013-01-14 23:07:28 +04:00
|
|
|
// If we're writing a new file (not overwriting an existing
|
|
|
|
// one), save the newly generated keyfile
|
2012-10-16 18:02:51 +04:00
|
|
|
if ( ! $this->getKey() ) {
|
2012-12-11 19:10:56 +04:00
|
|
|
|
2013-04-16 20:29:22 +04:00
|
|
|
$this->plainKey = Crypt::generateKey();
|
2012-12-11 19:10:56 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
2013-04-16 20:29:22 +04:00
|
|
|
|
2013-04-17 19:20:37 +04:00
|
|
|
// Fetch user's public key
|
|
|
|
$this->publicKey = Keymanager::getPublicKey( $this->rootView, $this->userId );
|
|
|
|
|
|
|
|
// Check if OC sharing api is enabled
|
|
|
|
$sharingEnabled = \OCP\Share::isEnabled();
|
|
|
|
|
|
|
|
$util = new Util( $this->rootView, $this->userId );
|
|
|
|
|
|
|
|
// Get all users sharing the file
|
|
|
|
$uniqueUserIds = $util->getSharingUsersArray( $sharingEnabled, $this->relPath );
|
|
|
|
|
|
|
|
// Fetch public keys for all sharing users
|
|
|
|
$publicKeys = Keymanager::getPublicKeys( $this->rootView, $uniqueUserIds );
|
|
|
|
|
|
|
|
// Encrypt enc key for all sharing users
|
|
|
|
$this->encKeyfiles = Crypt::multiKeyEncrypt( $this->plainKey, $publicKeys );
|
|
|
|
|
|
|
|
$view = new \OC_FilesystemView( '/' );
|
|
|
|
|
|
|
|
// Save the new encrypted file key
|
|
|
|
Keymanager::setFileKey( $this->rootView, $this->relPath, $this->userId, $this->encKeyfiles['data'] );
|
|
|
|
|
|
|
|
// Save the sharekeys
|
|
|
|
Keymanager::setShareKeys( $view, $this->relPath, $this->encKeyfiles['keys'] );
|
|
|
|
|
|
|
|
// trigger_error( "\$this->encKeyfiles['data'] = ".$this->encKeyfiles['data'] );
|
|
|
|
// trigger_error( '$this->relPath = '.$this->relPath );
|
|
|
|
// trigger_error( '$this->userId = '.$this->userId);
|
|
|
|
// trigger_error( '$this->encKeyfile = '.var_export($this->encKeyfiles, 1) );
|
2013-04-16 20:29:22 +04:00
|
|
|
// trigger_error( '$this->plainKey2 = '.var_export($this->plainKey, 1));
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// If extra data is left over from the last round, make sure it
|
|
|
|
// is integrated into the next 6126 / 8192 block
|
2012-10-16 18:02:51 +04:00
|
|
|
if ( $this->writeCache ) {
|
|
|
|
|
|
|
|
// Concat writeCache to start of $data
|
|
|
|
$data = $this->writeCache . $data;
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// Clear the write cache, ready for resuse - it has been
|
|
|
|
// flushed and its old contents processed
|
2012-10-16 18:02:51 +04:00
|
|
|
$this->writeCache = '';
|
|
|
|
|
|
|
|
}
|
2012-09-11 16:40:45 +04:00
|
|
|
//
|
2012-08-23 22:19:39 +04:00
|
|
|
// // Make sure we always start on a block start
|
2013-01-24 22:37:34 +04:00
|
|
|
if ( 0 != ( $pointer % 8192 ) ) {
|
2013-02-05 21:28:26 +04:00
|
|
|
// if the current position of
|
2013-01-24 22:37:34 +04:00
|
|
|
// file indicator is not aligned to a 8192 byte block, fix it
|
|
|
|
// so that it is
|
2012-10-10 21:40:59 +04:00
|
|
|
|
|
|
|
// fseek( $this->handle, - ( $pointer % 8192 ), SEEK_CUR );
|
|
|
|
//
|
|
|
|
// $pointer = ftell( $this->handle );
|
2012-08-23 22:19:39 +04:00
|
|
|
//
|
2012-10-10 21:40:59 +04:00
|
|
|
// $unencryptedNewBlock = fread( $this->handle, 8192 );
|
|
|
|
//
|
2012-09-11 16:40:45 +04:00
|
|
|
// fseek( $this->handle, - ( $currentPos % 8192 ), SEEK_CUR );
|
2012-08-23 22:19:39 +04:00
|
|
|
//
|
2013-04-16 20:29:22 +04:00
|
|
|
// $block = Crypt::symmetricDecryptFileContent( $unencryptedNewBlock, $this->plainKey );
|
2012-08-23 22:19:39 +04:00
|
|
|
//
|
|
|
|
// $x = substr( $block, 0, $currentPos % 8192 );
|
|
|
|
//
|
|
|
|
// $data = $x . $data;
|
|
|
|
//
|
2012-09-11 16:40:45 +04:00
|
|
|
// fseek( $this->handle, - ( $currentPos % 8192 ), SEEK_CUR );
|
2012-08-23 22:19:39 +04:00
|
|
|
//
|
2012-10-10 21:40:59 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
// $currentPos = ftell( $this->handle );
|
2012-09-11 16:40:45 +04:00
|
|
|
|
2012-10-10 21:40:59 +04:00
|
|
|
// // While there still remains somed data to be processed & written
|
|
|
|
while( strlen( $data ) > 0 ) {
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// // Remaining length for this iteration, not of the
|
|
|
|
// // entire file (may be greater than 8192 bytes)
|
2012-09-11 16:40:45 +04:00
|
|
|
// $remainingLength = strlen( $data );
|
|
|
|
//
|
2013-01-24 22:37:34 +04:00
|
|
|
// // If data remaining to be written is less than the
|
|
|
|
// // size of 1 6126 byte block
|
2012-10-16 18:02:51 +04:00
|
|
|
if ( strlen( $data ) < 6126 ) {
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
// Set writeCache to contents of $data
|
2013-01-24 22:37:34 +04:00
|
|
|
// The writeCache will be carried over to the
|
|
|
|
// next write round, and added to the start of
|
|
|
|
// $data to ensure that written blocks are
|
|
|
|
// always the correct length. If there is still
|
|
|
|
// data in writeCache after the writing round
|
|
|
|
// has finished, then the data will be written
|
|
|
|
// to disk by $this->flush().
|
2012-10-16 18:02:51 +04:00
|
|
|
$this->writeCache = $data;
|
|
|
|
|
|
|
|
// Clear $data ready for next round
|
|
|
|
$data = '';
|
2012-08-23 22:19:39 +04:00
|
|
|
//
|
2012-10-16 18:02:51 +04:00
|
|
|
} else {
|
2012-08-23 22:19:39 +04:00
|
|
|
|
2012-10-10 21:40:59 +04:00
|
|
|
// Read the chunk from the start of $data
|
|
|
|
$chunk = substr( $data, 0, 6126 );
|
|
|
|
|
2013-04-16 20:29:22 +04:00
|
|
|
$encrypted = $this->preWriteEncrypt( $chunk, $this->plainKey );
|
2012-10-10 21:40:59 +04:00
|
|
|
|
2013-04-17 19:20:37 +04:00
|
|
|
trigger_error("\$encrypted = $encrypted");
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// Write the data chunk to disk. This will be
|
2013-02-09 21:01:38 +04:00
|
|
|
// attended to the last data chunk if the file
|
2013-01-24 22:37:34 +04:00
|
|
|
// being handled totals more than 6126 bytes
|
2012-10-16 18:02:51 +04:00
|
|
|
fwrite( $this->handle, $encrypted );
|
2012-10-10 21:40:59 +04:00
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
$writtenLen = strlen( $encrypted );
|
2012-10-10 21:40:59 +04:00
|
|
|
//fseek( $this->handle, $writtenLen, SEEK_CUR );
|
2012-08-16 22:18:18 +04:00
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
// Remove the chunk we just processed from
|
|
|
|
// $data, leaving only unprocessed data in $data
|
|
|
|
// var, for handling on the next round
|
2012-10-10 21:40:59 +04:00
|
|
|
$data = substr( $data, 6126 );
|
2012-08-16 22:18:18 +04:00
|
|
|
|
2012-10-16 18:02:51 +04:00
|
|
|
}
|
|
|
|
|
2012-10-10 21:40:59 +04:00
|
|
|
}
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2012-10-10 21:40:59 +04:00
|
|
|
$this->size = max( $this->size, $pointer + $length );
|
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
return $length;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
public function stream_set_option( $option, $arg1, $arg2 ) {
|
2012-08-16 22:18:18 +04:00
|
|
|
switch($option) {
|
|
|
|
case STREAM_OPTION_BLOCKING:
|
2013-01-24 22:37:34 +04:00
|
|
|
stream_set_blocking( $this->handle, $arg1 );
|
2012-08-16 22:18:18 +04:00
|
|
|
break;
|
|
|
|
case STREAM_OPTION_READ_TIMEOUT:
|
2013-01-24 22:37:34 +04:00
|
|
|
stream_set_timeout( $this->handle, $arg1, $arg2 );
|
2012-08-16 22:18:18 +04:00
|
|
|
break;
|
|
|
|
case STREAM_OPTION_WRITE_BUFFER:
|
2013-01-24 22:37:34 +04:00
|
|
|
stream_set_write_buffer( $this->handle, $arg1, $arg2 );
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
public function stream_stat() {
|
2012-09-11 16:40:45 +04:00
|
|
|
return fstat($this->handle);
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
public function stream_lock( $mode ) {
|
|
|
|
flock( $this->handle, $mode );
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
public function stream_flush() {
|
2012-09-11 16:40:45 +04:00
|
|
|
|
2013-01-24 22:37:34 +04:00
|
|
|
return fflush( $this->handle );
|
|
|
|
// Not a typo: http://php.net/manual/en/function.fflush.php
|
2012-09-11 16:40:45 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
public function stream_eof() {
|
2012-09-11 16:40:45 +04:00
|
|
|
return feof($this->handle);
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
private function flush() {
|
2012-09-11 16:40:45 +04:00
|
|
|
|
|
|
|
if ( $this->writeCache ) {
|
|
|
|
|
|
|
|
// Set keyfile property for file in question
|
|
|
|
$this->getKey();
|
|
|
|
|
2013-04-16 20:29:22 +04:00
|
|
|
$encrypted = $this->preWriteEncrypt( $this->writeCache, $this->plainKey );
|
2012-09-11 16:40:45 +04:00
|
|
|
|
|
|
|
fwrite( $this->handle, $encrypted );
|
|
|
|
|
|
|
|
$this->writeCache = '';
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
2012-09-11 16:40:45 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
public function stream_close() {
|
2012-08-23 19:43:10 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
$this->flush();
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2013-01-06 22:38:35 +04:00
|
|
|
if (
|
|
|
|
$this->meta['mode']!='r'
|
|
|
|
and $this->meta['mode']!='rb'
|
|
|
|
) {
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2013-04-19 00:34:22 +04:00
|
|
|
\OC\Files\Filesystem::putFileInfo( $this->relPath, array( 'encrypted' => true, 'size' => $this->size ), '' );
|
2012-08-23 19:43:10 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
2013-04-17 19:20:37 +04:00
|
|
|
|
2013-01-06 22:38:35 +04:00
|
|
|
return fclose( $this->handle );
|
2012-08-23 19:43:10 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|
2012-08-23 19:43:10 +04:00
|
|
|
|
2012-08-16 22:18:18 +04:00
|
|
|
}
|