mirror of
https://github.com/PrivateBin/PrivateBin.git
synced 2024-12-29 01:06:20 -05:00
516 lines
17 KiB
PHP
516 lines
17 KiB
PHP
<?php
|
|
/**
|
|
* PrivateBin
|
|
*
|
|
* a zero-knowledge paste bin
|
|
*
|
|
* @link https://github.com/PrivateBin/PrivateBin
|
|
* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net)
|
|
* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
|
|
* @version 1.1
|
|
*/
|
|
|
|
namespace PrivateBin;
|
|
|
|
use Exception;
|
|
use PrivateBin\Persistence\ServerSalt;
|
|
use PrivateBin\Persistence\TrafficLimiter;
|
|
|
|
/**
|
|
* PrivateBin
|
|
*
|
|
* Controller, puts it all together.
|
|
*/
|
|
class PrivateBin
|
|
{
|
|
/**
|
|
* version
|
|
*
|
|
* @const string
|
|
*/
|
|
const VERSION = '1.1';
|
|
|
|
/**
|
|
* show the same error message if the paste expired or does not exist
|
|
*
|
|
* @const string
|
|
*/
|
|
const GENERIC_ERROR = 'Paste does not exist, has expired or has been deleted.';
|
|
|
|
/**
|
|
* configuration
|
|
*
|
|
* @access private
|
|
* @var Configuration
|
|
*/
|
|
private $_conf;
|
|
|
|
/**
|
|
* data
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
private $_data = '';
|
|
|
|
/**
|
|
* does the paste expire
|
|
*
|
|
* @access private
|
|
* @var bool
|
|
*/
|
|
private $_doesExpire = false;
|
|
|
|
/**
|
|
* error message
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
private $_error = '';
|
|
|
|
/**
|
|
* status message
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
private $_status = '';
|
|
|
|
/**
|
|
* JSON message
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
private $_json = '';
|
|
|
|
/**
|
|
* Factory of instance models
|
|
*
|
|
* @access private
|
|
* @var model
|
|
*/
|
|
private $_model;
|
|
|
|
/**
|
|
* request
|
|
*
|
|
* @access private
|
|
* @var request
|
|
*/
|
|
private $_request;
|
|
|
|
/**
|
|
* URL base
|
|
*
|
|
* @access private
|
|
* @var string
|
|
*/
|
|
private $_urlBase;
|
|
|
|
/**
|
|
* constructor
|
|
*
|
|
* initializes and runs PrivateBin
|
|
*
|
|
* @access public
|
|
* @throws Exception
|
|
* @return void
|
|
*/
|
|
public function __construct()
|
|
{
|
|
if (version_compare(PHP_VERSION, '5.3.0') < 0) {
|
|
throw new Exception(I18n::_('%s requires php 5.3.0 or above to work. Sorry.', I18n::_('PrivateBin')), 1);
|
|
}
|
|
if (strlen(PATH) < 0 && substr(PATH, -1) !== DIRECTORY_SEPARATOR) {
|
|
throw new Exception(I18n::_('%s requires the PATH to end in a "%s". Please update the PATH in your index.php.', I18n::_('PrivateBin'), DIRECTORY_SEPARATOR), 5);
|
|
}
|
|
|
|
// load config from ini file, initialize required classes
|
|
$this->_init();
|
|
|
|
switch ($this->_request->getOperation()) {
|
|
case 'create':
|
|
$this->_create();
|
|
break;
|
|
case 'delete':
|
|
$this->_delete(
|
|
$this->_request->getParam('pasteid'),
|
|
$this->_request->getParam('deletetoken')
|
|
);
|
|
break;
|
|
case 'read':
|
|
$this->_read($this->_request->getParam('pasteid'));
|
|
break;
|
|
case 'jsonld':
|
|
$this->_jsonld($this->_request->getParam('jsonld'));
|
|
return;
|
|
}
|
|
|
|
// output JSON or HTML
|
|
if ($this->_request->isJsonApiCall()) {
|
|
header('Content-type: ' . Request::MIME_JSON);
|
|
header('Access-Control-Allow-Origin: *');
|
|
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE');
|
|
header('Access-Control-Allow-Headers: X-Requested-With, Content-Type');
|
|
echo $this->_json;
|
|
} else {
|
|
$this->_view();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* initialize privatebin
|
|
*
|
|
* @access private
|
|
* @return void
|
|
*/
|
|
private function _init()
|
|
{
|
|
foreach (array('cfg', 'lib') as $dir) {
|
|
if (!is_file(PATH . $dir . DIRECTORY_SEPARATOR . '.htaccess')) {
|
|
file_put_contents(
|
|
PATH . $dir . DIRECTORY_SEPARATOR . '.htaccess',
|
|
'Allow from none' . PHP_EOL .
|
|
'Deny from all' . PHP_EOL,
|
|
LOCK_EX
|
|
);
|
|
}
|
|
}
|
|
|
|
$this->_conf = new Configuration;
|
|
$this->_model = new Model($this->_conf);
|
|
$this->_request = new Request;
|
|
$this->_urlBase = array_key_exists('REQUEST_URI', $_SERVER) ?
|
|
htmlspecialchars($_SERVER['REQUEST_URI']) : '/';
|
|
ServerSalt::setPath($this->_conf->getKey('dir', 'traffic'));
|
|
|
|
// set default language
|
|
$lang = $this->_conf->getKey('languagedefault');
|
|
I18n::setLanguageFallback($lang);
|
|
// force default language, if language selection is disabled and a default is set
|
|
if (!$this->_conf->getKey('languageselection') && strlen($lang) == 2) {
|
|
$_COOKIE['lang'] = $lang;
|
|
setcookie('lang', $lang);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Store new paste or comment
|
|
*
|
|
* POST contains one or both:
|
|
* data = json encoded SJCL encrypted text (containing keys: iv,v,iter,ks,ts,mode,adata,cipher,salt,ct)
|
|
* attachment = json encoded SJCL encrypted text (containing keys: iv,v,iter,ks,ts,mode,adata,cipher,salt,ct)
|
|
*
|
|
* All optional data will go to meta information:
|
|
* expire (optional) = expiration delay (never,5min,10min,1hour,1day,1week,1month,1year,burn) (default:never)
|
|
* formatter (optional) = format to display the paste as (plaintext,syntaxhighlighting,markdown) (default:syntaxhighlighting)
|
|
* burnafterreading (optional) = if this paste may only viewed once ? (0/1) (default:0)
|
|
* opendiscusssion (optional) = is the discussion allowed on this paste ? (0/1) (default:0)
|
|
* attachmentname = json encoded SJCL encrypted text (containing keys: iv,v,iter,ks,ts,mode,adata,cipher,salt,ct)
|
|
* nickname (optional) = in discussion, encoded SJCL encrypted text nickname of author of comment (containing keys: iv,v,iter,ks,ts,mode,adata,cipher,salt,ct)
|
|
* parentid (optional) = in discussion, which comment this comment replies to.
|
|
* pasteid (optional) = in discussion, which paste this comment belongs to.
|
|
*
|
|
* @access private
|
|
* @return string
|
|
*/
|
|
private function _create()
|
|
{
|
|
// Ensure last paste from visitors IP address was more than configured amount of seconds ago.
|
|
TrafficLimiter::setConfiguration($this->_conf);
|
|
if (!TrafficLimiter::canPass()) {
|
|
return $this->_return_message(
|
|
1, I18n::_(
|
|
'Please wait %d seconds between each post.',
|
|
$this->_conf->getKey('limit', 'traffic')
|
|
)
|
|
);
|
|
}
|
|
|
|
$data = $this->_request->getParam('data');
|
|
$attachment = $this->_request->getParam('attachment');
|
|
$attachmentname = $this->_request->getParam('attachmentname');
|
|
|
|
// Ensure content is not too big.
|
|
$sizelimit = $this->_conf->getKey('sizelimit');
|
|
if (
|
|
strlen($data) + strlen($attachment) + strlen($attachmentname) > $sizelimit
|
|
) {
|
|
return $this->_return_message(
|
|
1,
|
|
I18n::_(
|
|
'Paste is limited to %s of encrypted data.',
|
|
Filter::formatHumanReadableSize($sizelimit)
|
|
)
|
|
);
|
|
}
|
|
|
|
// Ensure attachment did not get lost due to webserver limits or Suhosin
|
|
if (strlen($attachmentname) > 0 && strlen($attachment) == 0) {
|
|
return $this->_return_message(1, 'Attachment missing in data received by server. Please check your webserver or suhosin configuration for maximum POST parameter limitations.');
|
|
}
|
|
|
|
// The user posts a comment.
|
|
$pasteid = $this->_request->getParam('pasteid');
|
|
$parentid = $this->_request->getParam('parentid');
|
|
if (!empty($pasteid) && !empty($parentid)) {
|
|
$paste = $this->_model->getPaste($pasteid);
|
|
if ($paste->exists()) {
|
|
try {
|
|
$comment = $paste->getComment($parentid);
|
|
|
|
$nickname = $this->_request->getParam('nickname');
|
|
if (!empty($nickname)) {
|
|
$comment->setNickname($nickname);
|
|
}
|
|
|
|
$comment->setData($data);
|
|
$comment->store();
|
|
} catch (Exception $e) {
|
|
return $this->_return_message(1, $e->getMessage());
|
|
}
|
|
$this->_return_message(0, $comment->getId());
|
|
} else {
|
|
$this->_return_message(1, 'Invalid data.');
|
|
}
|
|
}
|
|
// The user posts a standard paste.
|
|
else {
|
|
$this->_model->purge();
|
|
$paste = $this->_model->getPaste();
|
|
try {
|
|
$paste->setData($data);
|
|
|
|
if (!empty($attachment)) {
|
|
$paste->setAttachment($attachment);
|
|
if (!empty($attachmentname)) {
|
|
$paste->setAttachmentName($attachmentname);
|
|
}
|
|
}
|
|
|
|
$expire = $this->_request->getParam('expire');
|
|
if (!empty($expire)) {
|
|
$paste->setExpiration($expire);
|
|
}
|
|
|
|
$burnafterreading = $this->_request->getParam('burnafterreading');
|
|
if (!empty($burnafterreading)) {
|
|
$paste->setBurnafterreading($burnafterreading);
|
|
}
|
|
|
|
$opendiscussion = $this->_request->getParam('opendiscussion');
|
|
if (!empty($opendiscussion)) {
|
|
$paste->setOpendiscussion($opendiscussion);
|
|
}
|
|
|
|
$formatter = $this->_request->getParam('formatter');
|
|
if (!empty($formatter)) {
|
|
$paste->setFormatter($formatter);
|
|
}
|
|
|
|
$paste->store();
|
|
} catch (Exception $e) {
|
|
return $this->_return_message(1, $e->getMessage());
|
|
}
|
|
$this->_return_message(0, $paste->getId(), array('deletetoken' => $paste->getDeleteToken()));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Delete an existing paste
|
|
*
|
|
* @access private
|
|
* @param string $dataid
|
|
* @param string $deletetoken
|
|
* @return void
|
|
*/
|
|
private function _delete($dataid, $deletetoken)
|
|
{
|
|
try {
|
|
$paste = $this->_model->getPaste($dataid);
|
|
if ($paste->exists()) {
|
|
// accessing this property ensures that the paste would be
|
|
// deleted if it has already expired
|
|
$burnafterreading = $paste->isBurnafterreading();
|
|
if (
|
|
($burnafterreading && $deletetoken == 'burnafterreading') ||
|
|
Filter::slowEquals($deletetoken, $paste->getDeleteToken())
|
|
) {
|
|
// Paste exists and deletion token is valid: Delete the paste.
|
|
$paste->delete();
|
|
$this->_status = 'Paste was properly deleted.';
|
|
} else {
|
|
if (!$burnafterreading && $deletetoken == 'burnafterreading') {
|
|
$this->_error = 'Paste is not of burn-after-reading type.';
|
|
} else {
|
|
$this->_error = 'Wrong deletion token. Paste was not deleted.';
|
|
}
|
|
}
|
|
} else {
|
|
$this->_error = self::GENERIC_ERROR;
|
|
}
|
|
} catch (Exception $e) {
|
|
$this->_error = $e->getMessage();
|
|
}
|
|
if ($this->_request->isJsonApiCall()) {
|
|
if (strlen($this->_error)) {
|
|
$this->_return_message(1, $this->_error);
|
|
} else {
|
|
$this->_return_message(0, $dataid);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read an existing paste or comment
|
|
*
|
|
* @access private
|
|
* @param string $dataid
|
|
* @return void
|
|
*/
|
|
private function _read($dataid)
|
|
{
|
|
try {
|
|
$paste = $this->_model->getPaste($dataid);
|
|
if ($paste->exists()) {
|
|
$data = $paste->get();
|
|
$this->_doesExpire = property_exists($data, 'meta') && property_exists($data->meta, 'expire_date');
|
|
if (property_exists($data->meta, 'salt')) {
|
|
unset($data->meta->salt);
|
|
}
|
|
$this->_data = json_encode($data);
|
|
} else {
|
|
$this->_error = self::GENERIC_ERROR;
|
|
}
|
|
} catch (Exception $e) {
|
|
$this->_error = $e->getMessage();
|
|
}
|
|
|
|
if ($this->_request->isJsonApiCall()) {
|
|
if (strlen($this->_error)) {
|
|
$this->_return_message(1, $this->_error);
|
|
} else {
|
|
$this->_return_message(0, $dataid, json_decode($this->_data, true));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Display PrivateBin frontend.
|
|
*
|
|
* @access private
|
|
* @return void
|
|
*/
|
|
private function _view()
|
|
{
|
|
// set headers to disable caching
|
|
$time = gmdate('D, d M Y H:i:s \G\M\T');
|
|
header('Cache-Control: no-store, no-cache, no-transform, must-revalidate');
|
|
header('Pragma: no-cache');
|
|
header('Expires: ' . $time);
|
|
header('Last-Modified: ' . $time);
|
|
header('Vary: Accept');
|
|
header('Content-Security-Policy: ' . $this->_conf->getKey('cspheader'));
|
|
header('X-Xss-Protection: 1; mode=block');
|
|
header('X-Frame-Options: DENY');
|
|
header('X-Content-Type-Options: nosniff');
|
|
|
|
// label all the expiration options
|
|
$expire = array();
|
|
foreach ($this->_conf->getSection('expire_options') as $time => $seconds) {
|
|
$expire[$time] = ($seconds == 0) ? I18n::_(ucfirst($time)) : Filter::formatHumanReadableTime($time);
|
|
}
|
|
|
|
// translate all the formatter options
|
|
$formatters = array_map('PrivateBin\\I18n::_', $this->_conf->getSection('formatter_options'));
|
|
|
|
// set language cookie if that functionality was enabled
|
|
$languageselection = '';
|
|
if ($this->_conf->getKey('languageselection')) {
|
|
$languageselection = I18n::getLanguage();
|
|
setcookie('lang', $languageselection);
|
|
}
|
|
|
|
$page = new View;
|
|
$page->assign('NAME', $this->_conf->getKey('name'));
|
|
$page->assign('CIPHERDATA', $this->_data);
|
|
$page->assign('ERROR', I18n::_($this->_error));
|
|
$page->assign('STATUS', I18n::_($this->_status));
|
|
$page->assign('VERSION', self::VERSION);
|
|
$page->assign('DISCUSSION', $this->_conf->getKey('discussion'));
|
|
$page->assign('OPENDISCUSSION', $this->_conf->getKey('opendiscussion'));
|
|
$page->assign('MARKDOWN', array_key_exists('markdown', $formatters));
|
|
$page->assign('SYNTAXHIGHLIGHTING', array_key_exists('syntaxhighlighting', $formatters));
|
|
$page->assign('SYNTAXHIGHLIGHTINGTHEME', $this->_conf->getKey('syntaxhighlightingtheme'));
|
|
$page->assign('FORMATTER', $formatters);
|
|
$page->assign('FORMATTERDEFAULT', $this->_conf->getKey('defaultformatter'));
|
|
$page->assign('NOTICE', I18n::_($this->_conf->getKey('notice')));
|
|
$page->assign('BURNAFTERREADINGSELECTED', $this->_conf->getKey('burnafterreadingselected'));
|
|
$page->assign('PASSWORD', $this->_conf->getKey('password'));
|
|
$page->assign('FILEUPLOAD', $this->_conf->getKey('fileupload'));
|
|
$page->assign('ZEROBINCOMPATIBILITY', $this->_conf->getKey('zerobincompatibility'));
|
|
$page->assign('LANGUAGESELECTION', $languageselection);
|
|
$page->assign('LANGUAGES', I18n::getLanguageLabels(I18n::getAvailableLanguages()));
|
|
$page->assign('EXPIRE', $expire);
|
|
$page->assign('EXPIREDEFAULT', $this->_conf->getKey('default', 'expire'));
|
|
$page->assign('EXPIRECLONE', !$this->_doesExpire || ($this->_doesExpire && $this->_conf->getKey('clone', 'expire')));
|
|
$page->assign('URLSHORTENER', $this->_conf->getKey('urlshortener'));
|
|
$page->draw($this->_conf->getKey('template'));
|
|
}
|
|
|
|
/**
|
|
* outputs requested JSON-LD context
|
|
*
|
|
* @access private
|
|
* @param string $type
|
|
* @return void
|
|
*/
|
|
private function _jsonld($type)
|
|
{
|
|
if (
|
|
$type !== 'paste' && $type !== 'comment' &&
|
|
$type !== 'pastemeta' && $type !== 'commentmeta'
|
|
) {
|
|
$type = '';
|
|
}
|
|
$content = '{}';
|
|
$file = PUBLIC_PATH . DIRECTORY_SEPARATOR . 'js' . DIRECTORY_SEPARATOR . $type . '.jsonld';
|
|
if (is_readable($file)) {
|
|
$content = str_replace(
|
|
'?jsonld=',
|
|
$this->_urlBase . '?jsonld=',
|
|
file_get_contents($file)
|
|
);
|
|
}
|
|
|
|
header('Content-type: application/ld+json');
|
|
header('Access-Control-Allow-Origin: *');
|
|
header('Access-Control-Allow-Methods: GET');
|
|
echo $content;
|
|
}
|
|
|
|
/**
|
|
* prepares JSON encoded status message
|
|
*
|
|
* @access private
|
|
* @param int $status
|
|
* @param string $message
|
|
* @param array $other
|
|
* @return void
|
|
*/
|
|
private function _return_message($status, $message, $other = array())
|
|
{
|
|
$result = array('status' => $status);
|
|
if ($status) {
|
|
$result['message'] = I18n::_($message);
|
|
} else {
|
|
$result['id'] = $message;
|
|
$result['url'] = $this->_urlBase . '?' . $message;
|
|
}
|
|
$result += $other;
|
|
$this->_json = json_encode($result);
|
|
}
|
|
}
|