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Fix source code escaping in comments

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Also fix comments.
This commit is contained in:
rugk 2020-03-04 13:29:06 +01:00
parent 005d223c0d
commit 294b8804a4
3 changed files with 30 additions and 10 deletions
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36
js/privatebin.js
View File

@ -374,6 +374,31 @@ jQuery.PrivateBin = (function($, RawDeflate) {
}
};
/**
* formats the text that needs to be formatted, so DomPurify can properly escape it.
*
* @name Helper.preformatTextForDomPurify
* @function
* @param {string} html
* @param {'markdown'|'syntaxhighlighting'|'plaintext'} text
* @return {string} new text
*/
me.preformatTextForDomPurify = function(text, format)
{
if (!format) {
throw new TypeError('invalid format parameter');
}
// encode < to make sure DomPurify does not interpret e.g. HTML or XML markup as code
// cf. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/xmp#Summary
// As Markdown, by definition, is/allows HTML code, we do not do anything there.
if (format !== 'markdown') {
// one character is enough, as this is not security-relevant (all output will go through DOMPurify later)
text = text.replace(/</g, '&lt;');
}
return text;
};
/**
* convert URLs to clickable links.
*
@ -2504,13 +2529,7 @@ jQuery.PrivateBin = (function($, RawDeflate) {
return;
}
// encode < to make sure DomPurify does not interpret e.g. HTML or XML markup as code
// cf. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/xmp#Summary
// As Markdown, by definition, is/allows HTML code, we do not do anything there.
if (format !== 'markdown') {
// one character is enough, as this is not security-relevant (all output will go through DOMPurify later)
text = text.replace(/</g, '&lt;');
}
text = Helper.preformatTextForDomPurify(text, format);
// escape HTML entities, link URLs, sanitize
const escapedLinkedText = Helper.urls2links(text),
@ -3321,7 +3340,7 @@ jQuery.PrivateBin = (function($, RawDeflate) {
*/
me.addComment = function(comment, commentText, nickname)
{
if (commentText === '') {
if (!commentText) {
commentText = 'comment decryption failed';
}
@ -3331,6 +3350,7 @@ jQuery.PrivateBin = (function($, RawDeflate) {
const $commentEntryData = $commentEntry.find('div.commentdata');
// set & parse text
commentText = Helper.preformatTextForDomPurify(commentText, 'plaintext');
$commentEntryData.html(
DOMPurify.sanitize(
Helper.urls2links(commentText), {

2
tpl/bootstrap.php
View File

@ -72,7 +72,7 @@ endif;
?>
<script type="text/javascript" data-cfasync="false" src="js/purify-2.0.8.js" integrity="sha512-x2Kev3A7fqc/QKCzRHoJ7qCiglgxXtY8WDUMPOUBI6jVueqRkRMGjP1IqD9iUWVuND81ckCCS27Br5M11tw0IA==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/legacy.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-3L/E22cdC3wDFXKM1i32bw4HdrfX14du2xswUKanOY6CLrD+e0hykmLvES+zfBKF1GFQFKr3OmdCVH2y+zHlsA==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-0Gt+x+QenVjex80M6AXnrJIOqVV19nV+s8P9T9K68+vyvFGW/Fx34viKK8zzu1ME2GYctsJlNB4I1x75P095ZQ==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-5l2RuILQ59Go14jKwavtCpGEnUhzIkYyLF1ctlOaYxD5HVuBg4IAj5svkFQ4rirruhw88REZ6swax3CuLHeftg==" crossorigin="anonymous"></script>
<link rel="apple-touch-icon" href="img/apple-touch-icon.png?<?php echo rawurlencode($VERSION); ?>" sizes="180x180" />
<link rel="icon" type="image/png" href="img/favicon-32x32.png?<?php echo rawurlencode($VERSION); ?>" sizes="32x32" />
<link rel="icon" type="image/png" href="img/favicon-16x16.png?<?php echo rawurlencode($VERSION); ?>" sizes="16x16" />

2
tpl/page.php
View File

@ -50,7 +50,7 @@ endif;
?>
<script type="text/javascript" data-cfasync="false" src="js/purify-2.0.8.js" integrity="sha512-x2Kev3A7fqc/QKCzRHoJ7qCiglgxXtY8WDUMPOUBI6jVueqRkRMGjP1IqD9iUWVuND81ckCCS27Br5M11tw0IA==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/legacy.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-3L/E22cdC3wDFXKM1i32bw4HdrfX14du2xswUKanOY6CLrD+e0hykmLvES+zfBKF1GFQFKr3OmdCVH2y+zHlsA==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-0Gt+x+QenVjex80M6AXnrJIOqVV19nV+s8P9T9K68+vyvFGW/Fx34viKK8zzu1ME2GYctsJlNB4I1x75P095ZQ==" crossorigin="anonymous"></script>
<script type="text/javascript" data-cfasync="false" src="js/privatebin.js?<?php echo rawurlencode($VERSION); ?>" integrity="sha512-5l2RuILQ59Go14jKwavtCpGEnUhzIkYyLF1ctlOaYxD5HVuBg4IAj5svkFQ4rirruhw88REZ6swax3CuLHeftg==" crossorigin="anonymous"></script>
<link rel="apple-touch-icon" href="img/apple-touch-icon.png?<?php echo rawurlencode($VERSION); ?>" sizes="180x180" />
<link rel="icon" type="image/png" href="img/favicon-32x32.png?<?php echo rawurlencode($VERSION); ?>" sizes="32x32" />
<link rel="icon" type="image/png" href="img/favicon-16x16.png?<?php echo rawurlencode($VERSION); ?>" sizes="16x16" />