Backport pull request #380 from butonic/feature_share_link_with_token

1 files changed, 211 insertions, 154 deletions

diff --git a/apps/files_sharing/public.php b/apps/files_sharing/public.php
index 09a1f0f6d76..923a8d862e1 100644
--- a/apps/files_sharing/public.php
+++ b/apps/files_sharing/public.php
@@ -19,15 +19,15 @@ if (isset($_GET['token'])) {
 		\OCP\Util::writeLog('files_sharing', 'You have files that are shared by link originating from ownCloud 4.0. Redistribute the new links, because backwards compatibility will be removed in ownCloud 5.', \OCP\Util::WARN);
 	}
 }
-// Enf of backward compatibility
 
 function getID($path) {
-	// use the share table from the db to find the item source if the file was reshared because shared files are not stored in the file cache.
+	// use the share table from the db to find the item source if the file was reshared because shared files
+	// are not stored in the file cache.
 	if (substr(OC_Filesystem::getMountPoint($path), -7, 6) == "Shared") {
 		$path_parts = explode('/', $path, 5);
 		$user = $path_parts[1];
 		$intPath = '/'.$path_parts[4];
-		$query = \OC_DB::prepare('SELECT item_source FROM *PREFIX*share WHERE uid_owner = ? AND file_target = ? ');
+		$query = \OC_DB::prepare('SELECT `item_source` FROM `*PREFIX*share` WHERE `uid_owner` = ? AND `file_target` = ? ');
 		$result = $query->execute(array($user, $intPath));
 		$row = $result->fetchRow();
 		$fileSource = $row['item_source'];
@@ -37,185 +37,242 @@ function getID($path) {
 	
 	return $fileSource;
 }
+// End of backward compatibility
 
-if (isset($_GET['file']) || isset($_GET['dir'])) {
+/**
+ * lookup file path and owner by fetching it from the fscache
+ * needed becaus OC_FileCache::getPath($id, $user) already requires the user
+ * @param int $id
+ * @return array
+ */
+function getPathAndUser($id) {
+	$query = \OC_DB::prepare('SELECT `user`, `path` FROM `*PREFIX*fscache` WHERE `id` = ?');
+	$result = $query->execute(array($id));
+	$row = $result->fetchRow();
+	return $row;
+}
+
+
+if (isset($_GET['t'])) {
+	$token = $_GET['t'];
+	$linkItem = OCP\Share::getShareByToken($token);
+	if (is_array($linkItem) && isset($linkItem['uid_owner'])) {
+		// seems to be a valid share
+		$type = $linkItem['item_type'];
+		$fileSource = $linkItem['file_source'];
+		$shareOwner = $linkItem['uid_owner'];
+		
+		if (OCP\User::userExists($shareOwner) && $fileSource != -1 ) {
+			
+			$pathAndUser = getPathAndUser($linkItem['file_source']);
+			$fileOwner = $pathAndUser['user'];
+			
+			//if this is a reshare check the file owner also exists
+			if ($shareOwner != $fileOwner && ! OCP\User::userExists($fileOwner)) {
+					OCP\Util::writeLog('share', 'original file owner '.$fileOwner.' does not exist for share '.$linkItem['id'], \OCP\Util::ERROR);
+					header('HTTP/1.0 404 Not Found');
+					$tmpl = new OCP\Template('', '404', 'guest');
+					$tmpl->printPage();
+					exit();
+			}
+			
+			//mount filesystem of file owner
+			OC_Util::setupFS($fileOwner);
+		}
+	}
+} else if (isset($_GET['file']) || isset($_GET['dir'])) {
+	OCP\Util::writeLog('share', 'Missing token, trying fallback file/dir links', \OCP\Util::DEBUG);
 	if (isset($_GET['dir'])) {
 		$type = 'folder';
 		$path = $_GET['dir'];
-		if(strlen($path)>1 and substr($path,-1,1)==='/') {
-			$path=substr($path,0,-1);
+		if(strlen($path)>1 and substr($path, -1, 1)==='/') {
+			$path=substr($path, 0, -1);
 		}
 		$baseDir = $path;
 		$dir = $baseDir;
 	} else {
 		$type = 'file';
 		$path = $_GET['file'];
-		if(strlen($path)>1 and substr($path,-1,1)==='/') {
-			$path=substr($path,0,-1);
+		if(strlen($path)>1 and substr($path, -1, 1)==='/') {
+			$path=substr($path, 0, -1);
 		}
 	}
-	$uidOwner = substr($path, 1, strpos($path, '/', 1) - 1);
-	if (OCP\User::userExists($uidOwner)) {
-		OC_Util::setupFS($uidOwner);
+	$shareOwner = substr($path, 1, strpos($path, '/', 1) - 1);
+	
+	if (OCP\User::userExists($shareOwner)) {
+		OC_Util::setupFS($shareOwner);
 		$fileSource = getID($path);
-		if ($fileSource != -1 && ($linkItem = OCP\Share::getItemSharedWithByLink($type, $fileSource, $uidOwner))) {
-			// TODO Fix in the getItems
-			if (!isset($linkItem['item_type']) || $linkItem['item_type'] != $type) {
+		if ($fileSource != -1 ) {
+			$linkItem = OCP\Share::getItemSharedWithByLink($type, $fileSource, $shareOwner);
+			$pathAndUser['path'] = $path;
+			$path_parts = explode('/', $path, 5);
+			$pathAndUser['user'] = $path_parts[1];
+			$fileOwner = $path_parts[1];
+		}
+	}
+}
+
+if ($linkItem) {
+	if (!isset($linkItem['item_type'])) {
+		OCP\Util::writeLog('share', 'No item type set for share id: '.$linkItem['id'], \OCP\Util::ERROR);
+		header('HTTP/1.0 404 Not Found');
+		$tmpl = new OCP\Template('', '404', 'guest');
+		$tmpl->printPage();
+		exit();
+	}
+	if (isset($linkItem['share_with'])) {
+		// Authenticate share_with
+		$url = OCP\Util::linkToPublic('files').'&t='.$token;
+		if (isset($_GET['file'])) {
+			$url .= '&file='.urlencode($_GET['file']);
+		} else if (isset($_GET['dir'])) {
+			$url .= '&dir='.urlencode($_GET['dir']);
+		}
+		if (isset($_POST['password'])) {
+			$password = $_POST['password'];
+			if ($linkItem['share_type'] == OCP\Share::SHARE_TYPE_LINK) {
+				// Check Password
+				$forcePortable = (CRYPT_BLOWFISH != 1);
+				$hasher = new PasswordHash(8, $forcePortable);
+				if (!($hasher->CheckPassword($password.OC_Config::getValue('passwordsalt', ''), $linkItem['share_with']))) {
+					$tmpl = new OCP\Template('files_sharing', 'authenticate', 'guest');
+					$tmpl->assign('URL', $url);
+					$tmpl->assign('error', true);
+					$tmpl->printPage();
+					exit();
+				} else {
+					// Save item id in session for future requests
+					$_SESSION['public_link_authenticated'] = $linkItem['id'];
+				}
+			} else {
+				OCP\Util::writeLog('share', 'Unknown share type '.$linkItem['share_type'].' for share id '.$linkItem['id'], \OCP\Util::ERROR);
 				header('HTTP/1.0 404 Not Found');
 				$tmpl = new OCP\Template('', '404', 'guest');
 				$tmpl->printPage();
 				exit();
 			}
-			if (isset($linkItem['share_with'])) {
-				// Check password
-				if (isset($_GET['file'])) {
-					$url = OCP\Util::linkToPublic('files').'&file='.urlencode($_GET['file']);
-				} else {
-					$url = OCP\Util::linkToPublic('files').'&dir='.urlencode($_GET['dir']);
+		// Check if item id is set in session
+		} else if (!isset($_SESSION['public_link_authenticated']) || $_SESSION['public_link_authenticated'] !== $linkItem['id']) {
+			// Prompt for password
+			$tmpl = new OCP\Template('files_sharing', 'authenticate', 'guest');
+			$tmpl->assign('URL', $url);
+			$tmpl->printPage();
+			exit();
+		}
+	}
+	$basePath = substr($pathAndUser['path'] , strlen('/'.$fileOwner.'/files'));
+	$path = $basePath;
+	if (isset($_GET['path'])) {
+		$path .= $_GET['path'];
+	}
+	if (!$path || !OC_Filesystem::isValidPath($path) || !OC_Filesystem::file_exists($path)) {
+		OCP\Util::writeLog('share', 'Invalid path '.$path.' for share id '.$linkItem['id'], \OCP\Util::ERROR);
+		header('HTTP/1.0 404 Not Found');
+		$tmpl = new OCP\Template('', '404', 'guest');
+		$tmpl->printPage();
+		exit();
+	}
+	$dir = dirname($path);
+	$file = basename($path);
+	// Download the file
+	if (isset($_GET['download'])) {
+		if (isset($_GET['path']) && $_GET['path'] !== '' ) {
+			if ( isset($_GET['files']) ) { // download selected files
+				OC_Files::get($path, $_GET['files'], $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
+			} else if (isset($_GET['path']) && $_GET['path'] != '' ) { // download a file from a shared directory
+				OC_Files::get($dir, $file, $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
+			} else { // download the whole shared directory
+				OC_Files::get($dir, $file, $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
+			}
+		} else { // download a single shared file
+			OC_Files::get($dir, $file, $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
+		}
+
+	} else {
+		OCP\Util::addStyle('files_sharing', 'public');
+		OCP\Util::addScript('files_sharing', 'public');
+		OCP\Util::addScript('files', 'fileactions');
+		$tmpl = new OCP\Template('files_sharing', 'public', 'base');
+		$tmpl->assign('uidOwner', $shareOwner);
+		$tmpl->assign('dir', $dir);
+		$tmpl->assign('filename', $file);
+		$tmpl->assign('mimetype', OC_Filesystem::getMimeType($path));
+		if (isset($_GET['path'])) {
+			$getPath = $_GET['path'];
+		} else {
+			$getPath = '';
+		}
+		//
+		$urlLinkIdentifiers= (isset($token)?'&t='.$token:'').(isset($_GET['dir'])?'&dir='.$_GET['dir']:'').(isset($_GET['file'])?'&file='.$_GET['file']:'');
+		// Show file list
+		if (OC_Filesystem::is_dir($path)) {
+			OCP\Util::addStyle('files', 'files');
+			OCP\Util::addScript('files', 'files');
+			OCP\Util::addScript('files', 'filelist');
+			$files = array();
+			$rootLength = strlen($basePath) + 1;
+			foreach (OC_Files::getDirectoryContent($path) as $i) {
+				$i['date'] = OCP\Util::formatDate($i['mtime']);
+				if ($i['type'] == 'file') {
+					$fileinfo = pathinfo($i['name']);
+					$i['basename'] = $fileinfo['filename'];
+					$i['extension'] = isset($fileinfo['extension']) ? ('.'.$fileinfo['extension']) : '';
 				}
-				if (isset($_POST['password'])) {
-					$password = $_POST['password'];
-					$storedHash = $linkItem['share_with'];
-					$forcePortable = (CRYPT_BLOWFISH != 1);
-					$hasher = new PasswordHash(8, $forcePortable);
-					if (!($hasher->CheckPassword($password.OC_Config::getValue('passwordsalt', ''), $storedHash))) {
-						$tmpl = new OCP\Template('files_sharing', 'authenticate', 'guest');
-						$tmpl->assign('URL', $url);
-						$tmpl->assign('error', true);
-						$tmpl->printPage();
-						exit();
-					} else {
-						// Save item id in session for future requests
-						$_SESSION['public_link_authenticated'] = $linkItem['id'];
-					}
-				// Check if item id is set in session
-				} else if (!isset($_SESSION['public_link_authenticated']) || $_SESSION['public_link_authenticated'] !== $linkItem['id']) {
-					// Prompt for password
-					$tmpl = new OCP\Template('files_sharing', 'authenticate', 'guest');
-					$tmpl->assign('URL', $url);
-					$tmpl->printPage();
-					exit();
+				$i['directory'] = '/'.substr($i['directory'], $rootLength);
+				if ($i['directory'] == '/') {
+					$i['directory'] = '';
 				}
+				$i['permissions'] = OCP\Share::PERMISSION_READ;
+				$files[] = $i;
 			}
-			$path = $linkItem['path'];
-			if (isset($_GET['path'])) {
-				$path .= $_GET['path'];
-				$dir .= $_GET['path'];
-				if (!OC_Filesystem::file_exists($path)) {
-					header('HTTP/1.0 404 Not Found');
-					$tmpl = new OCP\Template('', '404', 'guest');
-					$tmpl->printPage();
-					exit();
+			// Make breadcrumb
+			$breadcrumb = array();
+			$pathtohere = '';
+
+			//add base breadcrumb
+			$breadcrumb[] = array('dir' => '/', 'name' => basename($basePath));
+
+			//add subdir breadcrumbs
+			foreach (explode('/', urldecode($_GET['path'])) as $i) {
+				if ($i != '') {
+					$pathtohere .= '/'.$i;
+					$breadcrumb[] = array('dir' => $pathtohere, 'name' => $i);
 				}
 			}
-			// Download the file
-			if (isset($_GET['download'])) {
-				if (isset($_GET['dir'])) {
-					if ( isset($_GET['files']) ) { // download selected files
-						OC_Files::get($path, $_GET['files'], $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
-					} else 	if (isset($_GET['path']) &&  $_GET['path'] != '' ) { // download a file from a shared directory
-						OC_Files::get('', $path, $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
-					} else { // download the whole shared directory
-						OC_Files::get($path, '', $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
-					}
-				} else { // download a single shared file
-					OC_Files::get("", $path, $_SERVER['REQUEST_METHOD'] == 'HEAD' ? true : false);
-				}
 				
+			$list = new OCP\Template('files', 'part.list', '');
+			$list->assign('files', $files, false);
+			$list->assign('publicListView', true);
+			$list->assign('baseURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&path=', false);
+			$list->assign('downloadURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&download&path=', false);
+			$breadcrumbNav = new OCP\Template('files', 'part.breadcrumb', '' );
+			$breadcrumbNav->assign('breadcrumb', $breadcrumb, false);
+			$breadcrumbNav->assign('baseURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&path=', false);
+			$folder = new OCP\Template('files', 'index', '');
+			$folder->assign('fileList', $list->fetchPage(), false);
+			$folder->assign('breadcrumb', $breadcrumbNav->fetchPage(), false);
+			$folder->assign('isCreatable', false);
+			$folder->assign('permissions', 0);
+			$folder->assign('files', $files);
+			$folder->assign('uploadMaxFilesize', 0);
+			$folder->assign('uploadMaxHumanFilesize', 0);
+			$folder->assign('allowZipDownload', intval(OCP\Config::getSystemValue('allowZipDownload', true)));
+			$tmpl->assign('folder', $folder->fetchPage(), false);
+			$tmpl->assign('allowZipDownload', intval(OCP\Config::getSystemValue('allowZipDownload', true)));
+			$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&download&path='.urlencode($getPath));
+		} else {
+			// Show file preview if viewer is available
+			if ($type == 'file') {
+				$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&download');
 			} else {
-				OCP\Util::addStyle('files_sharing', 'public');
-				OCP\Util::addScript('files_sharing', 'public');
-				OCP\Util::addScript('files', 'fileactions');
-				$tmpl = new OCP\Template('files_sharing', 'public', 'base');
-				$tmpl->assign('owner', $uidOwner);
-				// Show file list
-				if (OC_Filesystem::is_dir($path)) {
-					OCP\Util::addStyle('files', 'files');
-					OCP\Util::addScript('files', 'files');
-					OCP\Util::addScript('files', 'filelist');
-					$files = array();
-					$rootLength = strlen($baseDir) + 1;
-					foreach (OC_Files::getDirectoryContent($path) as $i) {
-						$i['date'] = OCP\Util::formatDate($i['mtime']);
-						if ($i['type'] == 'file') {
-							$fileinfo = pathinfo($i['name']);
-							$i['basename'] = $fileinfo['filename'];
-							$i['extension'] = isset($fileinfo['extension']) ? ('.'.$fileinfo['extension']) : '';
-						}
-						$i['directory'] = '/'.substr('/'.$uidOwner.'/files'.$i['directory'], $rootLength);
-						if ($i['directory'] == '/') {
-							$i['directory'] = '';
-						}
-						$i['permissions'] = OCP\Share::PERMISSION_READ;
-						$files[] = $i;
-					}
-					// Make breadcrumb
-					$breadcrumb = array();
-					$pathtohere = '';
-					$count = 1;
-					foreach (explode('/', $dir) as $i) {
-						if ($i != '') {
-							if ($i != $baseDir) {
-								$pathtohere .= '/'.$i;
-							}						
-							if ( strlen($pathtohere) <  strlen($_GET['dir'])) {
-								continue;
-							}
-							$breadcrumb[] = array('dir' => str_replace($_GET['dir'], "", $pathtohere, $count), 'name' => $i);
-						}
-					}
-					$list = new OCP\Template('files', 'part.list', '');
-					$list->assign('files', $files, false);
-					$list->assign('publicListView', true);
-					$list->assign('baseURL', OCP\Util::linkToPublic('files').'&dir='.urlencode($_GET['dir']).'&path=', false);
-					$list->assign('downloadURL', OCP\Util::linkToPublic('files').'&download&dir='.urlencode($_GET['dir']).'&path=', false);
-					$breadcrumbNav = new OCP\Template('files', 'part.breadcrumb', '' );
-					$breadcrumbNav->assign('breadcrumb', $breadcrumb, false);
-					$breadcrumbNav->assign('baseURL', OCP\Util::linkToPublic('files').'&dir='.urlencode($_GET['dir']).'&path=', false);
-					$folder = new OCP\Template('files', 'index', '');
-					$folder->assign('fileList', $list->fetchPage(), false);
-					$folder->assign('breadcrumb', $breadcrumbNav->fetchPage(), false);
-					$folder->assign('dir', basename($dir));
-					$folder->assign('isCreatable', false);
-					$folder->assign('permissions', 0);
-					$folder->assign('files', $files);
-					$folder->assign('uploadMaxFilesize', 0);
-					$folder->assign('uploadMaxHumanFilesize', 0);
-					$folder->assign('allowZipDownload', intval(OCP\Config::getSystemValue('allowZipDownload', true)));
-					$tmpl->assign('folder', $folder->fetchPage(), false);
-					$tmpl->assign('uidOwner', $uidOwner);
-					$tmpl->assign('dir', basename($dir));
-					$tmpl->assign('filename', basename($path));
-					$tmpl->assign('mimetype', OC_Filesystem::getMimeType($path));
-					$tmpl->assign('allowZipDownload', intval(OCP\Config::getSystemValue('allowZipDownload', true)));
-					if (isset($_GET['path'])) {
-						$getPath = $_GET['path'];
-					} else {
-						$getPath = '';
-					}
-					$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').'&download&dir='.urlencode($_GET['dir']).'&path='.urlencode($getPath));
-				} else {
-					// Show file preview if viewer is available
-					$tmpl->assign('uidOwner', $uidOwner);
-					$tmpl->assign('dir', dirname($path));
-					$tmpl->assign('filename', basename($path));
-					$tmpl->assign('mimetype', OC_Filesystem::getMimeType($path));
-					if ($type == 'file') {
-						$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').'&file='.urlencode($_GET['file']).'&download');
-					} else {
-						if (isset($_GET['path'])) {
-							$getPath = $_GET['path'];
-						} else {
-							$getPath = '';
-						}
-						$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').'&download&dir='.urlencode($_GET['dir']).'&path='.urlencode($getPath));
-					}
-				}
-				$tmpl->printPage();
+				$tmpl->assign('downloadURL', OCP\Util::linkToPublic('files').$urlLinkIdentifiers.'&download&path='.urlencode($getPath));
 			}
-			exit();
 		}
+		$tmpl->printPage();
 	}
+	exit();
+} else {
+	OCP\Util::writeLog('share', 'could not resolve linkItem', \OCP\Util::DEBUG);
 }
 header('HTTP/1.0 404 Not Found');
 $tmpl = new OCP\Template('', '404', 'guest');