1 files changed, 0 insertions, 500 deletions
diff --git a/lib/private/files/stream/encryption.php b/lib/private/files/stream/encryption.php
deleted file mode 100644
index 772c9769bf7..00000000000
--- a/lib/private/files/stream/encryption.php
+++ /dev/null
@@ -1,500 +0,0 @@
-<?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;
-	}
-
-}