You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
236 lines
7.8 KiB
PHP
236 lines
7.8 KiB
PHP
<?php
|
|
/**
|
|
* Filesystem Attachments
|
|
*
|
|
* This is a core plugin which provides basic, filesystem based
|
|
* attachment temporary file handling. This includes storing
|
|
* attachments of messages currently being composed, writing attachments
|
|
* to disk when drafts with attachments are re-opened and writing
|
|
* attachments to disk for inline display in current html compositions.
|
|
* It also handles uploaded files for other uses, so not only attachments.
|
|
*
|
|
* Developers may wish to extend this class when creating attachment
|
|
* handler plugins:
|
|
* require_once('plugins/filesystem_attachments/filesystem_attachments.php');
|
|
* class myCustom_attachments extends filesystem_attachments
|
|
*
|
|
* Note for developers: It is plugin's responsibility to care about security.
|
|
* So, e.g. if the plugin is asked about some file path it should check
|
|
* if it's really the storage path of the plugin and not e.g. /etc/passwd.
|
|
* It is done by setting 'status' flag on every plugin hook it uses.
|
|
* Roundcube core will trust the returned path if status=true.
|
|
*
|
|
* @license GNU GPLv3+
|
|
* @author Ziba Scott <ziba@umich.edu>
|
|
* @author Thomas Bruederli <roundcube@gmail.com>
|
|
*/
|
|
class filesystem_attachments extends rcube_plugin
|
|
{
|
|
public $task = '?(?!login).*';
|
|
|
|
function init()
|
|
{
|
|
// Save a newly uploaded attachment
|
|
$this->add_hook('attachment_upload', array($this, 'upload'));
|
|
|
|
// Save an attachment from a non-upload source (draft or forward)
|
|
$this->add_hook('attachment_save', array($this, 'save'));
|
|
|
|
// Remove an attachment from storage
|
|
$this->add_hook('attachment_delete', array($this, 'remove'));
|
|
|
|
// When composing an html message, image attachments may be shown
|
|
$this->add_hook('attachment_display', array($this, 'display'));
|
|
|
|
// Get the attachment from storage and place it on disk to be sent
|
|
$this->add_hook('attachment_get', array($this, 'get'));
|
|
|
|
// Delete all temp files associated with this user
|
|
$this->add_hook('attachments_cleanup', array($this, 'cleanup'));
|
|
$this->add_hook('session_destroy', array($this, 'cleanup'));
|
|
}
|
|
|
|
/**
|
|
* Save a newly uploaded attachment
|
|
*/
|
|
function upload($args)
|
|
{
|
|
$args['status'] = false;
|
|
$group = $args['group'];
|
|
$rcmail = rcube::get_instance();
|
|
|
|
// use common temp dir for file uploads
|
|
$tmpfname = rcube_utils::temp_filename('attmnt');
|
|
|
|
if (move_uploaded_file($args['path'], $tmpfname) && file_exists($tmpfname)) {
|
|
$args['id'] = $this->file_id();
|
|
$args['path'] = $tmpfname;
|
|
$args['status'] = true;
|
|
@chmod($tmpfname, 0600); // set correct permissions (#1488996)
|
|
|
|
// Note the file for later cleanup
|
|
$_SESSION['plugins']['filesystem_attachments'][$group][$args['id']] = $tmpfname;
|
|
}
|
|
|
|
return $args;
|
|
}
|
|
|
|
/**
|
|
* Save an attachment from a non-upload source (draft or forward)
|
|
*/
|
|
function save($args)
|
|
{
|
|
$group = $args['group'];
|
|
$args['status'] = false;
|
|
|
|
if (!$args['path']) {
|
|
$tmp_path = rcube_utils::temp_filename('attmnt');
|
|
|
|
if ($fp = fopen($tmp_path, 'w')) {
|
|
fwrite($fp, $args['data']);
|
|
fclose($fp);
|
|
$args['path'] = $tmp_path;
|
|
}
|
|
else {
|
|
return $args;
|
|
}
|
|
}
|
|
|
|
$args['id'] = $this->file_id();
|
|
$args['status'] = true;
|
|
|
|
// Note the file for later cleanup
|
|
$_SESSION['plugins']['filesystem_attachments'][$group][$args['id']] = $args['path'];
|
|
|
|
return $args;
|
|
}
|
|
|
|
/**
|
|
* Remove an attachment from storage
|
|
* This is triggered by the remove attachment button on the compose screen
|
|
*/
|
|
function remove($args)
|
|
{
|
|
$args['status'] = $this->verify_path($args['path']) && @unlink($args['path']);
|
|
return $args;
|
|
}
|
|
|
|
/**
|
|
* When composing an html message, image attachments may be shown
|
|
* For this plugin, the file is already in place, just check for
|
|
* the existence of the proper metadata
|
|
*/
|
|
function display($args)
|
|
{
|
|
$args['status'] = $this->verify_path($args['path']) && file_exists($args['path']);
|
|
return $args;
|
|
}
|
|
|
|
/**
|
|
* This attachment plugin doesn't require any steps to put the file
|
|
* on disk for use. This stub function is kept here to make this
|
|
* class handy as a parent class for other plugins which may need it.
|
|
*/
|
|
function get($args)
|
|
{
|
|
if (!$this->verify_path($args['path'])) {
|
|
$args['path'] = null;
|
|
}
|
|
|
|
return $args;
|
|
}
|
|
|
|
/**
|
|
* Delete all temp files associated with this user
|
|
*/
|
|
function cleanup($args)
|
|
{
|
|
// $_SESSION['compose']['attachments'] is not a complete record of
|
|
// temporary files because loading a draft or starting a forward copies
|
|
// the file to disk, but does not make an entry in that array
|
|
if (is_array($_SESSION['plugins']['filesystem_attachments'])) {
|
|
foreach ($_SESSION['plugins']['filesystem_attachments'] as $group => $files) {
|
|
if ($args['group'] && $args['group'] != $group) {
|
|
continue;
|
|
}
|
|
|
|
foreach ((array)$files as $filename) {
|
|
if (file_exists($filename)) {
|
|
unlink($filename);
|
|
}
|
|
}
|
|
|
|
unset($_SESSION['plugins']['filesystem_attachments'][$group]);
|
|
}
|
|
}
|
|
return $args;
|
|
}
|
|
|
|
function file_id()
|
|
{
|
|
$userid = rcube::get_instance()->user->ID;
|
|
list($usec, $sec) = explode(' ', microtime());
|
|
$id = preg_replace('/[^0-9]/', '', $userid . $sec . $usec);
|
|
|
|
// make sure the ID is really unique (#1489546)
|
|
while ($this->find_file_by_id($id)) {
|
|
// increment last four characters
|
|
$x = substr($id, -4) + 1;
|
|
$id = substr($id, 0, -4) . sprintf('%04d', ($x > 9999 ? $x - 9999 : $x));
|
|
}
|
|
|
|
return $id;
|
|
}
|
|
|
|
private function find_file_by_id($id)
|
|
{
|
|
foreach ((array) $_SESSION['plugins']['filesystem_attachments'] as $group => $files) {
|
|
if (isset($files[$id])) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* For security we'll always verify the file path stored in session,
|
|
* as session entries can be faked in various ways e.g. #6026.
|
|
* We allow only files in Roundcube temp dir
|
|
*/
|
|
protected function verify_path($path)
|
|
{
|
|
if (empty($path)) {
|
|
return false;
|
|
}
|
|
|
|
$rcmail = rcube::get_instance();
|
|
$temp_dir = $rcmail->config->get('temp_dir');
|
|
$file_path = pathinfo($path, PATHINFO_DIRNAME);
|
|
|
|
if ($temp_dir !== $file_path) {
|
|
// When the configured directory is not writable, or out of open_basedir path
|
|
// tempnam() fallbacks to system temp without a warning.
|
|
// We allow that, but we'll let to know the user about the misconfiguration.
|
|
if ($file_path == sys_get_temp_dir()) {
|
|
rcube::raise_error(array(
|
|
'file' => __FILE__,
|
|
'line' => __LINE__,
|
|
'message' => "Detected 'temp_dir' change. Access to '$temp_dir' restricted by filesystem permissions or open_basedir",
|
|
), true, false);
|
|
|
|
return true;
|
|
}
|
|
|
|
rcube::raise_error(array(
|
|
'file' => __FILE__,
|
|
'line' => __LINE__,
|
|
'message' => sprintf("%s can't read %s (not in temp_dir)",
|
|
$rcmail->get_user_name(), substr($path, 0, 512))
|
|
), true, false);
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|