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-rw-r--r--lib/private/Files/Stream/Close.php118
-rw-r--r--lib/private/Files/Stream/Dir.php66
-rw-r--r--lib/private/Files/Stream/Encryption.php500
-rw-r--r--lib/private/Files/Stream/OC.php153
-rw-r--r--lib/private/Files/Stream/Quota.php156
-rw-r--r--lib/private/Files/Stream/StaticStream.php170
6 files changed, 1163 insertions, 0 deletions
diff --git a/lib/private/Files/Stream/Close.php b/lib/private/Files/Stream/Close.php
new file mode 100644
index 00000000000..1c9b30705dd
--- /dev/null
+++ b/lib/private/Files/Stream/Close.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+/**
+ * stream wrapper that provides a callback on stream close
+ */
+class Close {
+ private static $callBacks = array();
+ private $path = '';
+ private $source;
+ private static $open = array();
+
+ public function stream_open($path, $mode, $options, &$opened_path) {
+ $path = substr($path, strlen('close://'));
+ $this->path = $path;
+ $this->source = fopen($path, $mode);
+ if (is_resource($this->source)) {
+ $this->meta = stream_get_meta_data($this->source);
+ }
+ self::$open[] = $path;
+ return is_resource($this->source);
+ }
+
+ public function stream_seek($offset, $whence = SEEK_SET) {
+ return fseek($this->source, $offset, $whence) === 0;
+ }
+
+ public function stream_tell() {
+ return ftell($this->source);
+ }
+
+ public function stream_read($count) {
+ return fread($this->source, $count);
+ }
+
+ public function stream_write($data) {
+ return fwrite($this->source, $data);
+ }
+
+ public function stream_set_option($option, $arg1, $arg2) {
+ switch ($option) {
+ case STREAM_OPTION_BLOCKING:
+ stream_set_blocking($this->source, $arg1);
+ break;
+ case STREAM_OPTION_READ_TIMEOUT:
+ stream_set_timeout($this->source, $arg1, $arg2);
+ break;
+ case STREAM_OPTION_WRITE_BUFFER:
+ stream_set_write_buffer($this->source, $arg1, $arg2);
+ }
+ }
+
+ public function stream_stat() {
+ return fstat($this->source);
+ }
+
+ public function stream_lock($mode) {
+ flock($this->source, $mode);
+ }
+
+ public function stream_flush() {
+ return fflush($this->source);
+ }
+
+ public function stream_eof() {
+ return feof($this->source);
+ }
+
+ public function url_stat($path) {
+ $path = substr($path, strlen('close://'));
+ if (file_exists($path)) {
+ return stat($path);
+ } else {
+ return false;
+ }
+ }
+
+ public function stream_close() {
+ fclose($this->source);
+ if (isset(self::$callBacks[$this->path])) {
+ call_user_func(self::$callBacks[$this->path], $this->path);
+ }
+ }
+
+ public function unlink($path) {
+ $path = substr($path, strlen('close://'));
+ return unlink($path);
+ }
+
+ /**
+ * @param string $path
+ */
+ public static function registerCallback($path, $callback) {
+ self::$callBacks[$path] = $callback;
+ }
+}
diff --git a/lib/private/Files/Stream/Dir.php b/lib/private/Files/Stream/Dir.php
new file mode 100644
index 00000000000..7489ee683a2
--- /dev/null
+++ b/lib/private/Files/Stream/Dir.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+class Dir {
+ private static $dirs = array();
+ private $name;
+ private $index;
+
+ public function dir_opendir($path, $options) {
+ $this->name = substr($path, strlen('fakedir://'));
+ $this->index = 0;
+ if (!isset(self::$dirs[$this->name])) {
+ self::$dirs[$this->name] = array();
+ }
+ return true;
+ }
+
+ public function dir_readdir() {
+ if ($this->index >= count(self::$dirs[$this->name])) {
+ return false;
+ }
+ $filename = self::$dirs[$this->name][$this->index];
+ $this->index++;
+ return $filename;
+ }
+
+ public function dir_closedir() {
+ $this->name = '';
+ return true;
+ }
+
+ public function dir_rewinddir() {
+ $this->index = 0;
+ return true;
+ }
+
+ /**
+ * @param string $path
+ * @param string[] $content
+ */
+ public static function register($path, $content) {
+ self::$dirs[$path] = $content;
+ }
+}
diff --git a/lib/private/Files/Stream/Encryption.php b/lib/private/Files/Stream/Encryption.php
new file mode 100644
index 00000000000..772c9769bf7
--- /dev/null
+++ b/lib/private/Files/Stream/Encryption.php
@@ -0,0 +1,500 @@
+<?php
+/**
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author jknockaert <jasper@knockaert.nl>
+ * @author Lukas Reschke <lukas@owncloud.com>
+ * @author Roeland Jago Douma <rullzer@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+use Icewind\Streams\Wrapper;
+use OC\Encryption\Exceptions\EncryptionHeaderKeyExistsException;
+
+class Encryption extends Wrapper {
+
+ /** @var \OC\Encryption\Util */
+ protected $util;
+
+ /** @var \OC\Encryption\File */
+ protected $file;
+
+ /** @var \OCP\Encryption\IEncryptionModule */
+ protected $encryptionModule;
+
+ /** @var \OC\Files\Storage\Storage */
+ protected $storage;
+
+ /** @var \OC\Files\Storage\Wrapper\Encryption */
+ protected $encryptionStorage;
+
+ /** @var string */
+ protected $internalPath;
+
+ /** @var string */
+ protected $cache;
+
+ /** @var integer */
+ protected $size;
+
+ /** @var integer */
+ protected $position;
+
+ /** @var integer */
+ protected $unencryptedSize;
+
+ /** @var integer */
+ protected $headerSize;
+
+ /** @var integer */
+ protected $unencryptedBlockSize;
+
+ /** @var array */
+ protected $header;
+
+ /** @var string */
+ protected $fullPath;
+
+ /** @var bool */
+ protected $signed;
+
+ /**
+ * header data returned by the encryption module, will be written to the file
+ * in case of a write operation
+ *
+ * @var array
+ */
+ protected $newHeader;
+
+ /**
+ * user who perform the read/write operation null for public access
+ *
+ * @var string
+ */
+ protected $uid;
+
+ /** @var bool */
+ protected $readOnly;
+
+ /** @var bool */
+ protected $writeFlag;
+
+ /** @var array */
+ protected $expectedContextProperties;
+
+ public function __construct() {
+ $this->expectedContextProperties = array(
+ 'source',
+ 'storage',
+ 'internalPath',
+ 'fullPath',
+ 'encryptionModule',
+ 'header',
+ 'uid',
+ 'file',
+ 'util',
+ 'size',
+ 'unencryptedSize',
+ 'encryptionStorage',
+ 'headerSize',
+ 'signed'
+ );
+ }
+
+
+ /**
+ * Wraps a stream with the provided callbacks
+ *
+ * @param resource $source
+ * @param string $internalPath relative to mount point
+ * @param string $fullPath relative to data/
+ * @param array $header
+ * @param string $uid
+ * @param \OCP\Encryption\IEncryptionModule $encryptionModule
+ * @param \OC\Files\Storage\Storage $storage
+ * @param \OC\Files\Storage\Wrapper\Encryption $encStorage
+ * @param \OC\Encryption\Util $util
+ * @param \OC\Encryption\File $file
+ * @param string $mode
+ * @param int $size
+ * @param int $unencryptedSize
+ * @param int $headerSize
+ * @param bool $signed
+ * @param string $wrapper stream wrapper class
+ * @return resource
+ *
+ * @throws \BadMethodCallException
+ */
+ public static function wrap($source, $internalPath, $fullPath, array $header,
+ $uid,
+ \OCP\Encryption\IEncryptionModule $encryptionModule,
+ \OC\Files\Storage\Storage $storage,
+ \OC\Files\Storage\Wrapper\Encryption $encStorage,
+ \OC\Encryption\Util $util,
+ \OC\Encryption\File $file,
+ $mode,
+ $size,
+ $unencryptedSize,
+ $headerSize,
+ $signed,
+ $wrapper = 'OC\Files\Stream\Encryption') {
+
+ $context = stream_context_create(array(
+ 'ocencryption' => array(
+ 'source' => $source,
+ 'storage' => $storage,
+ 'internalPath' => $internalPath,
+ 'fullPath' => $fullPath,
+ 'encryptionModule' => $encryptionModule,
+ 'header' => $header,
+ 'uid' => $uid,
+ 'util' => $util,
+ 'file' => $file,
+ 'size' => $size,
+ 'unencryptedSize' => $unencryptedSize,
+ 'encryptionStorage' => $encStorage,
+ 'headerSize' => $headerSize,
+ 'signed' => $signed
+ )
+ ));
+
+ return self::wrapSource($source, $context, 'ocencryption', $wrapper, $mode);
+ }
+
+ /**
+ * add stream wrapper
+ *
+ * @param resource $source
+ * @param string $mode
+ * @param resource $context
+ * @param string $protocol
+ * @param string $class
+ * @return resource
+ * @throws \BadMethodCallException
+ */
+ protected static function wrapSource($source, $context, $protocol, $class, $mode = 'r+') {
+ try {
+ stream_wrapper_register($protocol, $class);
+ if (@rewinddir($source) === false) {
+ $wrapped = fopen($protocol . '://', $mode, false, $context);
+ } else {
+ $wrapped = opendir($protocol . '://', $context);
+ }
+ } catch (\BadMethodCallException $e) {
+ stream_wrapper_unregister($protocol);
+ throw $e;
+ }
+ stream_wrapper_unregister($protocol);
+ return $wrapped;
+ }
+
+ /**
+ * Load the source from the stream context and return the context options
+ *
+ * @param string $name
+ * @return array
+ * @throws \BadMethodCallException
+ */
+ protected function loadContext($name) {
+ $context = parent::loadContext($name);
+
+ foreach ($this->expectedContextProperties as $property) {
+ if (array_key_exists($property, $context)) {
+ $this->{$property} = $context[$property];
+ } else {
+ throw new \BadMethodCallException('Invalid context, "' . $property . '" options not set');
+ }
+ }
+ return $context;
+
+ }
+
+ public function stream_open($path, $mode, $options, &$opened_path) {
+ $this->loadContext('ocencryption');
+
+ $this->position = 0;
+ $this->cache = '';
+ $this->writeFlag = false;
+ $this->unencryptedBlockSize = $this->encryptionModule->getUnencryptedBlockSize($this->signed);
+
+ if (
+ $mode === 'w'
+ || $mode === 'w+'
+ || $mode === 'wb'
+ || $mode === 'wb+'
+ || $mode === 'r+'
+ || $mode === 'rb+'
+ ) {
+ $this->readOnly = false;
+ } else {
+ $this->readOnly = true;
+ }
+
+ $sharePath = $this->fullPath;
+ if (!$this->storage->file_exists($this->internalPath)) {
+ $sharePath = dirname($sharePath);
+ }
+
+ $accessList = $this->file->getAccessList($sharePath);
+ $this->newHeader = $this->encryptionModule->begin($this->fullPath, $this->uid, $mode, $this->header, $accessList);
+
+ if (
+ $mode === 'w'
+ || $mode === 'w+'
+ || $mode === 'wb'
+ || $mode === 'wb+'
+ ) {
+ // We're writing a new file so start write counter with 0 bytes
+ $this->unencryptedSize = 0;
+ $this->writeHeader();
+ $this->headerSize = $this->util->getHeaderSize();
+ $this->size = $this->headerSize;
+ } else {
+ $this->skipHeader();
+ }
+
+ return true;
+
+ }
+
+ public function stream_eof() {
+ return $this->position >= $this->unencryptedSize;
+ }
+
+ public function stream_read($count) {
+
+ $result = '';
+
+ $count = min($count, $this->unencryptedSize - $this->position);
+ while ($count > 0) {
+ $remainingLength = $count;
+ // update the cache of the current block
+ $this->readCache();
+ // determine the relative position in the current block
+ $blockPosition = ($this->position % $this->unencryptedBlockSize);
+ // if entire read inside current block then only position needs to be updated
+ if ($remainingLength < ($this->unencryptedBlockSize - $blockPosition)) {
+ $result .= substr($this->cache, $blockPosition, $remainingLength);
+ $this->position += $remainingLength;
+ $count = 0;
+ // otherwise remainder of current block is fetched, the block is flushed and the position updated
+ } else {
+ $result .= substr($this->cache, $blockPosition);
+ $this->flush();
+ $this->position += ($this->unencryptedBlockSize - $blockPosition);
+ $count -= ($this->unencryptedBlockSize - $blockPosition);
+ }
+ }
+ return $result;
+
+ }
+
+ public function stream_write($data) {
+
+ $length = 0;
+ // loop over $data to fit it in 6126 sized unencrypted blocks
+ while (isset($data[0])) {
+ $remainingLength = strlen($data);
+
+ // set the cache to the current 6126 block
+ $this->readCache();
+
+ // for seekable streams the pointer is moved back to the beginning of the encrypted block
+ // flush will start writing there when the position moves to another block
+ $positionInFile = (int)floor($this->position / $this->unencryptedBlockSize) *
+ $this->util->getBlockSize() + $this->headerSize;
+ $resultFseek = $this->parentStreamSeek($positionInFile);
+
+ // only allow writes on seekable streams, or at the end of the encrypted stream
+ if (!($this->readOnly) && ($resultFseek || $positionInFile === $this->size)) {
+
+ // switch the writeFlag so flush() will write the block
+ $this->writeFlag = true;
+
+ // determine the relative position in the current block
+ $blockPosition = ($this->position % $this->unencryptedBlockSize);
+ // check if $data fits in current block
+ // if so, overwrite existing data (if any)
+ // update position and liberate $data
+ if ($remainingLength < ($this->unencryptedBlockSize - $blockPosition)) {
+ $this->cache = substr($this->cache, 0, $blockPosition)
+ . $data . substr($this->cache, $blockPosition + $remainingLength);
+ $this->position += $remainingLength;
+ $length += $remainingLength;
+ $data = '';
+ // if $data doesn't fit the current block, the fill the current block and reiterate
+ // after the block is filled, it is flushed and $data is updatedxxx
+ } else {
+ $this->cache = substr($this->cache, 0, $blockPosition) .
+ substr($data, 0, $this->unencryptedBlockSize - $blockPosition);
+ $this->flush();
+ $this->position += ($this->unencryptedBlockSize - $blockPosition);
+ $length += ($this->unencryptedBlockSize - $blockPosition);
+ $data = substr($data, $this->unencryptedBlockSize - $blockPosition);
+ }
+ } else {
+ $data = '';
+ }
+ $this->unencryptedSize = max($this->unencryptedSize, $this->position);
+ }
+ return $length;
+ }
+
+ public function stream_tell() {
+ return $this->position;
+ }
+
+ public function stream_seek($offset, $whence = SEEK_SET) {
+
+ $return = false;
+
+ switch ($whence) {
+ case SEEK_SET:
+ $newPosition = $offset;
+ break;
+ case SEEK_CUR:
+ $newPosition = $this->position + $offset;
+ break;
+ case SEEK_END:
+ $newPosition = $this->unencryptedSize + $offset;
+ break;
+ default:
+ return $return;
+ }
+
+ if ($newPosition > $this->unencryptedSize || $newPosition < 0) {
+ return $return;
+ }
+
+ $newFilePosition = floor($newPosition / $this->unencryptedBlockSize)
+ * $this->util->getBlockSize() + $this->headerSize;
+
+ $oldFilePosition = parent::stream_tell();
+ if ($this->parentStreamSeek($newFilePosition)) {
+ $this->parentStreamSeek($oldFilePosition);
+ $this->flush();
+ $this->parentStreamSeek($newFilePosition);
+ $this->position = $newPosition;
+ $return = true;
+ }
+ return $return;
+
+ }
+
+ public function stream_close() {
+ $this->flush('end');
+ $position = (int)floor($this->position/$this->unencryptedBlockSize);
+ $remainingData = $this->encryptionModule->end($this->fullPath, $position . 'end');
+ if ($this->readOnly === false) {
+ if(!empty($remainingData)) {
+ parent::stream_write($remainingData);
+ }
+ $this->encryptionStorage->updateUnencryptedSize($this->fullPath, $this->unencryptedSize);
+ }
+ return parent::stream_close();
+ }
+
+ /**
+ * write block to file
+ * @param string $positionPrefix
+ */
+ protected function flush($positionPrefix = '') {
+ // write to disk only when writeFlag was set to 1
+ if ($this->writeFlag) {
+ // 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
+ $position = (int)floor($this->position/$this->unencryptedBlockSize);
+ $encrypted = $this->encryptionModule->encrypt($this->cache, $position . $positionPrefix);
+ $bytesWritten = parent::stream_write($encrypted);
+ $this->writeFlag = false;
+ // Check whether the write concerns the last block
+ // If so then update the encrypted filesize
+ // Note that the unencrypted pointer and filesize are NOT yet updated when flush() is called
+ // We recalculate the encrypted filesize as we do not know the context of calling flush()
+ $completeBlocksInFile=(int)floor($this->unencryptedSize/$this->unencryptedBlockSize);
+ if ($completeBlocksInFile === (int)floor($this->position/$this->unencryptedBlockSize)) {
+ $this->size = $this->util->getBlockSize() * $completeBlocksInFile;
+ $this->size += $bytesWritten;
+ $this->size += $this->headerSize;
+ }
+ }
+ // always empty the cache (otherwise readCache() will not fill it with the new block)
+ $this->cache = '';
+ }
+
+ /**
+ * read block to file
+ */
+ protected function readCache() {
+ // cache should always be empty string when this function is called
+ // don't try to fill the cache when trying to write at the end of the unencrypted file when it coincides with new block
+ if ($this->cache === '' && !($this->position === $this->unencryptedSize && ($this->position % $this->unencryptedBlockSize) === 0)) {
+ // Get the data from the file handle
+ $data = parent::stream_read($this->util->getBlockSize());
+ $position = (int)floor($this->position/$this->unencryptedBlockSize);
+ $numberOfChunks = (int)($this->unencryptedSize / $this->unencryptedBlockSize);
+ if($numberOfChunks === $position) {
+ $position .= 'end';
+ }
+ $this->cache = $this->encryptionModule->decrypt($data, $position);
+ }
+ }
+
+ /**
+ * write header at beginning of encrypted file
+ *
+ * @return integer
+ * @throws EncryptionHeaderKeyExistsException if header key is already in use
+ */
+ protected function writeHeader() {
+ $header = $this->util->createHeader($this->newHeader, $this->encryptionModule);
+ return parent::stream_write($header);
+ }
+
+ /**
+ * read first block to skip the header
+ */
+ protected function skipHeader() {
+ parent::stream_read($this->headerSize);
+ }
+
+ /**
+ * call stream_seek() from parent class
+ *
+ * @param integer $position
+ * @return bool
+ */
+ protected function parentStreamSeek($position) {
+ return parent::stream_seek($position);
+ }
+
+ /**
+ * @param string $path
+ * @param array $options
+ * @return bool
+ */
+ public function dir_opendir($path, $options) {
+ return false;
+ }
+
+}
diff --git a/lib/private/Files/Stream/OC.php b/lib/private/Files/Stream/OC.php
new file mode 100644
index 00000000000..8439770e8fa
--- /dev/null
+++ b/lib/private/Files/Stream/OC.php
@@ -0,0 +1,153 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Robin McCorkell <robin@mccorkell.me.uk>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+/**
+ * a stream wrappers for ownCloud's virtual filesystem
+ */
+class OC {
+ /**
+ * @var \OC\Files\View
+ */
+ static private $rootView;
+
+ private $path;
+
+ /**
+ * @var resource
+ */
+ private $dirSource;
+
+ /**
+ * @var resource
+ */
+ private $fileSource;
+ private $meta;
+
+ private function setup(){
+ if (!self::$rootView) {
+ self::$rootView = new \OC\Files\View('');
+ }
+ }
+
+ public function stream_open($path, $mode, $options, &$opened_path) {
+ $this->setup();
+ $path = substr($path, strlen('oc://'));
+ $this->path = $path;
+ $this->fileSource = self::$rootView->fopen($path, $mode);
+ if (is_resource($this->fileSource)) {
+ $this->meta = stream_get_meta_data($this->fileSource);
+ }
+ return is_resource($this->fileSource);
+ }
+
+ public function stream_seek($offset, $whence = SEEK_SET) {
+ return fseek($this->fileSource, $offset, $whence) === 0;
+ }
+
+ public function stream_tell() {
+ return ftell($this->fileSource);
+ }
+
+ public function stream_read($count) {
+ return fread($this->fileSource, $count);
+ }
+
+ public function stream_write($data) {
+ return fwrite($this->fileSource, $data);
+ }
+
+ public function stream_set_option($option, $arg1, $arg2) {
+ switch ($option) {
+ case STREAM_OPTION_BLOCKING:
+ stream_set_blocking($this->fileSource, $arg1);
+ break;
+ case STREAM_OPTION_READ_TIMEOUT:
+ stream_set_timeout($this->fileSource, $arg1, $arg2);
+ break;
+ case STREAM_OPTION_WRITE_BUFFER:
+ stream_set_write_buffer($this->fileSource, $arg1, $arg2);
+ }
+ }
+
+ public function stream_stat() {
+ return fstat($this->fileSource);
+ }
+
+ public function stream_lock($mode) {
+ flock($this->fileSource, $mode);
+ }
+
+ public function stream_flush() {
+ return fflush($this->fileSource);
+ }
+
+ public function stream_eof() {
+ return feof($this->fileSource);
+ }
+
+ public function url_stat($path) {
+ $this->setup();
+ $path = substr($path, strlen('oc://'));
+ if (self::$rootView->file_exists($path)) {
+ return self::$rootView->stat($path);
+ } else {
+ return false;
+ }
+ }
+
+ public function stream_close() {
+ fclose($this->fileSource);
+ }
+
+ public function unlink($path) {
+ $this->setup();
+ $path = substr($path, strlen('oc://'));
+ return self::$rootView->unlink($path);
+ }
+
+ public function dir_opendir($path, $options) {
+ $this->setup();
+ $path = substr($path, strlen('oc://'));
+ $this->path = $path;
+ $this->dirSource = self::$rootView->opendir($path);
+ if (is_resource($this->dirSource)) {
+ $this->meta = stream_get_meta_data($this->dirSource);
+ }
+ return is_resource($this->dirSource);
+ }
+
+ public function dir_readdir() {
+ return readdir($this->dirSource);
+ }
+
+ public function dir_closedir() {
+ closedir($this->dirSource);
+ }
+
+ public function dir_rewinddir() {
+ rewinddir($this->dirSource);
+ }
+}
diff --git a/lib/private/Files/Stream/Quota.php b/lib/private/Files/Stream/Quota.php
new file mode 100644
index 00000000000..8d27575c568
--- /dev/null
+++ b/lib/private/Files/Stream/Quota.php
@@ -0,0 +1,156 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Vincent Petry <pvince81@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+/**
+ * stream wrapper limits the amount of data that can be written to a stream
+ *
+ * usage: void \OC\Files\Stream\Quota::register($id, $stream, $limit)
+ * or: resource \OC\Files\Stream\Quota::wrap($stream, $limit)
+ */
+class Quota {
+ private static $streams = array();
+
+ /**
+ * @var resource $source
+ */
+ private $source;
+
+ /**
+ * @var int $limit
+ */
+ private $limit;
+
+ /**
+ * @param string $id
+ * @param resource $stream
+ * @param int $limit
+ */
+ public static function register($id, $stream, $limit) {
+ self::$streams[$id] = array($stream, $limit);
+ }
+
+ /**
+ * remove all registered streams
+ */
+ public static function clear() {
+ self::$streams = array();
+ }
+
+ /**
+ * @param resource $stream
+ * @param int $limit
+ * @return resource
+ */
+ static public function wrap($stream, $limit) {
+ $id = uniqid();
+ self::register($id, $stream, $limit);
+ $meta = stream_get_meta_data($stream);
+ return fopen('quota://' . $id, $meta['mode']);
+ }
+
+ public function stream_open($path, $mode, $options, &$opened_path) {
+ $id = substr($path, strlen('quota://'));
+ if (isset(self::$streams[$id])) {
+ list($this->source, $this->limit) = self::$streams[$id];
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ public function stream_seek($offset, $whence = SEEK_SET) {
+ if ($whence === SEEK_END){
+ // go to the end to find out last position's offset
+ $oldOffset = $this->stream_tell();
+ if (fseek($this->source, 0, $whence) !== 0){
+ return false;
+ }
+ $whence = SEEK_SET;
+ $offset = $this->stream_tell() + $offset;
+ $this->limit += $oldOffset - $offset;
+ }
+ else if ($whence === SEEK_SET) {
+ $this->limit += $this->stream_tell() - $offset;
+ } else {
+ $this->limit -= $offset;
+ }
+ // this wrapper needs to return "true" for success.
+ // the fseek call itself returns 0 on succeess
+ return fseek($this->source, $offset, $whence) === 0;
+ }
+
+ public function stream_tell() {
+ return ftell($this->source);
+ }
+
+ public function stream_read($count) {
+ $this->limit -= $count;
+ return fread($this->source, $count);
+ }
+
+ public function stream_write($data) {
+ $size = strlen($data);
+ if ($size > $this->limit) {
+ $data = substr($data, 0, $this->limit);
+ $size = $this->limit;
+ }
+ $this->limit -= $size;
+ return fwrite($this->source, $data);
+ }
+
+ public function stream_set_option($option, $arg1, $arg2) {
+ switch ($option) {
+ case STREAM_OPTION_BLOCKING:
+ stream_set_blocking($this->source, $arg1);
+ break;
+ case STREAM_OPTION_READ_TIMEOUT:
+ stream_set_timeout($this->source, $arg1, $arg2);
+ break;
+ case STREAM_OPTION_WRITE_BUFFER:
+ stream_set_write_buffer($this->source, $arg1, $arg2);
+ }
+ }
+
+ public function stream_stat() {
+ return fstat($this->source);
+ }
+
+ public function stream_lock($mode) {
+ return flock($this->source, $mode);
+ }
+
+ public function stream_flush() {
+ return fflush($this->source);
+ }
+
+ public function stream_eof() {
+ return feof($this->source);
+ }
+
+ public function stream_close() {
+ fclose($this->source);
+ }
+}
diff --git a/lib/private/Files/Stream/StaticStream.php b/lib/private/Files/Stream/StaticStream.php
new file mode 100644
index 00000000000..7aacf7a9fe4
--- /dev/null
+++ b/lib/private/Files/Stream/StaticStream.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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, version 3,
+ * along with this program. If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Files\Stream;
+
+class StaticStream {
+ const MODE_FILE = 0100000;
+
+ public $context;
+ protected static $data = array();
+
+ protected $path = '';
+ protected $pointer = 0;
+ protected $writable = false;
+
+ public function stream_close() {
+ }
+
+ public function stream_eof() {
+ return $this->pointer >= strlen(self::$data[$this->path]);
+ }
+
+ public function stream_flush() {
+ }
+
+ public static function clear() {
+ self::$data = array();
+ }
+
+ public function stream_open($path, $mode, $options, &$opened_path) {
+ switch ($mode[0]) {
+ case 'r':
+ if (!isset(self::$data[$path])) return false;
+ $this->path = $path;
+ $this->writable = isset($mode[1]) && $mode[1] == '+';
+ break;
+ case 'w':
+ self::$data[$path] = '';
+ $this->path = $path;
+ $this->writable = true;
+ break;
+ case 'a':
+ if (!isset(self::$data[$path])) self::$data[$path] = '';
+ $this->path = $path;
+ $this->writable = true;
+ $this->pointer = strlen(self::$data[$path]);
+ break;
+ case 'x':
+ if (isset(self::$data[$path])) return false;
+ $this->path = $path;
+ $this->writable = true;
+ break;
+ case 'c':
+ if (!isset(self::$data[$path])) self::$data[$path] = '';
+ $this->path = $path;
+ $this->writable = true;
+ break;
+ default:
+ return false;
+ }
+ $opened_path = $this->path;
+ return true;
+ }
+
+ public function stream_read($count) {
+ $bytes = min(strlen(self::$data[$this->path]) - $this->pointer, $count);
+ $data = substr(self::$data[$this->path], $this->pointer, $bytes);
+ $this->pointer += $bytes;
+ return $data;
+ }
+
+ public function stream_seek($offset, $whence = SEEK_SET) {
+ $len = strlen(self::$data[$this->path]);
+ switch ($whence) {
+ case SEEK_SET:
+ if ($offset <= $len) {
+ $this->pointer = $offset;
+ return true;
+ }
+ break;
+ case SEEK_CUR:
+ if ($this->pointer + $offset <= $len) {
+ $this->pointer += $offset;
+ return true;
+ }
+ break;
+ case SEEK_END:
+ if ($len + $offset <= $len) {
+ $this->pointer = $len + $offset;
+ return true;
+ }
+ break;
+ }
+ return false;
+ }
+
+ public function stream_stat() {
+ return $this->url_stat($this->path);
+ }
+
+ public function stream_tell() {
+ return $this->pointer;
+ }
+
+ public function stream_write($data) {
+ if (!$this->writable) return 0;
+ $size = strlen($data);
+ if ($this->stream_eof()) {
+ self::$data[$this->path] .= $data;
+ } else {
+ self::$data[$this->path] = substr_replace(
+ self::$data[$this->path],
+ $data,
+ $this->pointer
+ );
+ }
+ $this->pointer += $size;
+ return $size;
+ }
+
+ public function unlink($path) {
+ if (isset(self::$data[$path])) {
+ unset(self::$data[$path]);
+ }
+ return true;
+ }
+
+ public function url_stat($path) {
+ if (isset(self::$data[$path])) {
+ $size = strlen(self::$data[$path]);
+ $time = time();
+ $data = array(
+ 'dev' => 0,
+ 'ino' => 0,
+ 'mode' => self::MODE_FILE | 0777,
+ 'nlink' => 1,
+ 'uid' => 0,
+ 'gid' => 0,
+ 'rdev' => '',
+ 'size' => $size,
+ 'atime' => $time,
+ 'mtime' => $time,
+ 'ctime' => $time,
+ 'blksize' => -1,
+ 'blocks' => -1,
+ );
+ return array_values($data) + $data;
+ }
+ return false;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-21 04:04:50 +0000