dompurify - npm Package Compare versions

Comparing version 0.7.3 to 0.7.4

bower.json

 {
   "name": "DOMPurify",
-  "version": "0.7.3",
+  "version": "0.7.4",
   "homepage": "https://github.com/cure53/DOMPurify",
@@ -5,0 +5,0 @@ "author": "Cure53 <[e-mail]>",

dist/purify.min.js

@@ -1,2 +0,2 @@
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package.json

@@ -38,3 +38,3 @@ {
   "description": "DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It's written in JavaScript and works in all modern browsers (Safari, Opera (15+), Internet Explorer (10+), Firefox and Chrome - as well as almost anything else using Blink or WebKit). DOMPurify is written by security people who have vast background in web attacks and XSS. Fear not.",
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@@ -41,0 +41,0 @@ "directories": {

README.md

@@ -186,6 +186,6 @@ # DOMPurify [![Bower version](https://badge.fury.io/bo/dompurify.svg)](http://badge.fury.io/bo/dompurify) · [![npm version](https://badge.fury.io/js/dompurify.svg)](http://badge.fury.io/js/dompurify) · [![Build Status](https://travis-ci.org/cure53/DOMPurify.svg?branch=master)](https://travis-ci.org/cure53/DOMPurify)
 
-Several people need to be listed here! [@garethheyes](https://twitter.com/garethheyes) for invaluable help, [@shafigullin](https://twitter.com/shafigullin) for breaking the library multiple times and thereby strengthening it, [@mmrupp](https://twitter.com/mmrupp) and [@irsdl](https://twitter.com/irsdl) for doing the same.
+Several people need to be listed here! [@garethheyes](https://twitter.com/garethheyes) and [@filedescriptor](https://twitter.com/filedescriptor) for invaluable help, [@shafigullin](https://twitter.com/shafigullin) for breaking the library multiple times and thereby strengthening it, [@mmrupp](https://twitter.com/mmrupp) and [@irsdl](https://twitter.com/irsdl) for doing the same.
 
-Big thanks also go to [@asutherland](https://twitter.com/asutherland), [@mathias](https://twitter.com/mathias), [@cgvwzq](https://twitter.com/cgvwzq), [@robbertatwork](https://twitter.com/robbertatwork), [@giutro](https://twitter.com/giutro) and [@fhemberger](https://twitter.com/fhemberger)! Further, thanks [@neilj](https://twitter.com/neilj) for his code review and countless small optimizations, fixes and beautifications. Big thanks also go to [@tdeekens](https://twitter.com/tdeekens) for doing all the hard work and getting us on track with Travis CI and BrowserStack.
+Big thanks also go to [@asutherland](https://twitter.com/asutherland), [@mathias](https://twitter.com/mathias), [@cgvwzq](https://twitter.com/cgvwzq), [@robbertatwork](https://twitter.com/robbertatwork), [@giutro](https://twitter.com/giutro) and [@fhemberger](https://twitter.com/fhemberger)! Further, thanks [@neilj](https://twitter.com/neilj) and [@0xsobky](https://twitter.com/0xsobky) for their code reviews and countless small optimizations, fixes and beautifications. Big thanks also go to [@tdeekens](https://twitter.com/tdeekens) for doing all the hard work and getting us on track with Travis CI and BrowserStack.
 
 And last but not least, thanks to [BrowserStack](https://browserstack.com) for supporting this project with their services for free and delivering excellent, dedicated and very professional support on top of that.

src/purify.js

@@ -24,3 +24,3 @@ ;(function(factory) {
      */
-    DOMPurify.version = '0.7.3';
+    DOMPurify.version = '0.7.4';
 
@@ -215,2 +215,6 @@ if (!window || !window.document || window.document.nodeType !== 9) {
 
+    /* Specify template detection regex for SAFE_FOR_TEMPLATES mode */
+    var MUSTACHE_EXPR = /\{\{[\s\S]*|[\s\S]*\}\}/gm;
+    var ERB_EXPR = /<%[\s\S]*|[\s\S]*%>/gm;
+
     /* Decide if document with <html>... should be returned */
@@ -244,2 +248,13 @@ var WHOLE_DOCUMENT = false;
 
+    /* Tags that are safe for data: URIs */
+    var DATA_URI_TAGS = _addToSet({}, [
+        'audio', 'video', 'img', 'source'
+    ]);
+
+    /* Attributes safe for values like "javascript:" */
+    var URI_SAFE_ATTRIBUTES = _addToSet({}, [
+        'alt','class','for','id','label','name','pattern','placeholder',
+        'summary','title','value','style','xmlns'
+    ]);
+
     /* Keep a reference to config to pass to hooks */
@@ -283,2 +298,6 @@ var CONFIG = null;
 
+        if (SAFE_FOR_TEMPLATES) {
+            ALLOW_DATA_ATTR = false;
+        }
+
         if (RETURN_DOM_FRAGMENT) {
@@ -340,3 +359,3 @@ RETURN_DOM = true;
            DOMParser with text/html support is only in very recent browsers. */
-        if (!doc){
+        if (!doc) {
             doc = implementation.createHTMLDocument('');
@@ -349,9 +368,8 @@ body = doc.body;
         /* Work on whole document or just its body */
-        if (typeof doc.getElementsByTagName === 'function'){
+        if (typeof doc.getElementsByTagName === 'function') {
             return doc.getElementsByTagName(
                 WHOLE_DOCUMENT ? 'html' : 'body')[0];
-        } else {
-            return getElementsByTagName.call(doc,
-                WHOLE_DOCUMENT ? 'html' : 'body')[0];
         }
+        return getElementsByTagName.call(doc,
+            WHOLE_DOCUMENT ? 'html' : 'body')[0];
     };
@@ -398,5 +416,2 @@
 
-    var MUSTACHE_EXPR = /\{\{.*|.*\}\}/gm;
-    var ERB_EXPR = /<%.*|.*%>/gm;
-
     /**
@@ -413,2 +428,3 @@ * _sanitizeElements
     var _sanitizeElements = function(currentNode) {
+        var tagName, content;
         /* Execute a hook if present */
@@ -424,3 +440,3 @@ _executeHook('beforeSanitizeElements', currentNode, null);
         /* Now let's check the element's type and name */
-        var tagName = currentNode.nodeName.toLowerCase();
+        tagName = currentNode.nodeName.toLowerCase();
 
@@ -454,3 +470,3 @@ /* Execute a hook if present */
             /* Get the element's text content */
-            var content = currentNode.textContent;
+            content = currentNode.textContent;
             content = content.replace(MUSTACHE_EXPR, ' ');
@@ -468,3 +484,3 @@ content = content.replace(ERB_EXPR, ' ');
     var DATA_ATTR = /^data-[\w.\u00B7-\uFFFF-]/;
-    var IS_SCRIPT_OR_DATA = /^(?:\w+script|data):/i;
+    var IS_ALLOWED_URI = /^(?:(?:(?:f|ht)tps?|mailto|tel):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i;
     /* This needs to be extensive thanks to Webkit/Blink's behavior */
@@ -485,6 +501,7 @@ var ATTR_WHITESPACE = /[\x00-\x20\xA0\u1680\u180E\u2000-\u2029\u205f\u3000]/g;
     var _sanitizeAttributes = function(currentNode) {
+        var attr, name, value, lcName, idAttr, attributes, hookEvent, l;
         /* Execute a hook if present */
         _executeHook('beforeSanitizeAttributes', currentNode, null);
 
-        var attributes = currentNode.attributes;
+        attributes = currentNode.attributes;
 
@@ -494,3 +511,3 @@ /* Check if we have attributes; if not we might have a text node */
 
-        var hookEvent = {
+        hookEvent = {
             attrName: '',
@@ -500,4 +517,3 @@ attrValue: '',
         };
-        var l = attributes.length;
-        var attr, name, value, lcName, idAttr;
+        l = attributes.length;
 
@@ -553,26 +569,28 @@ /* Go backwards over all attributes; safely remove bad ones */
 
+            /* Sanitize attribute content to be template-safe */
+            if (SAFE_FOR_TEMPLATES) {
+                value = value.replace(MUSTACHE_EXPR, ' ');
+                value = value.replace(ERB_EXPR, ' ');
+            }
+
             if (
                 /* Check the name is permitted */
-                (
-                 (ALLOWED_ATTR[lcName] && !FORBID_ATTR[lcName]) ||
-                 /* Allow potentially valid data-* attributes
-                    * At least one character after "-" (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
-                    * XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804) */
-                 (!SAFE_FOR_TEMPLATES && ALLOW_DATA_ATTR && DATA_ATTR.test(lcName))
-                ) &&
-                /* Get rid of script and data URIs */
-                (
-                 !IS_SCRIPT_OR_DATA.test(value.replace(ATTR_WHITESPACE,'')) ||
-                 /* Keep image data URIs alive if src is allowed */
-                 (lcName === 'src' && value.indexOf('data:') === 0 &&
-                  currentNode.nodeName === 'IMG')
-                )
+                (ALLOWED_ATTR[lcName] && !FORBID_ATTR[lcName] && (
+                  /* Check no script, data or unknown possibly unsafe URI
+                     unless we know URI values are safe for that attribute */
+                  URI_SAFE_ATTRIBUTES[lcName] ||
+                  IS_ALLOWED_URI.test(value.replace(ATTR_WHITESPACE,'')) ||
+                  /* Keep image data URIs alive if src is allowed */
+                  (lcName === 'src' && value.indexOf('data:') === 0 &&
+                   DATA_URI_TAGS[currentNode.nodeName.toLowerCase()])
+                )) ||
+                /* Allow potentially valid data-* attributes:
+                 * At least one character after "-" (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
+                 * XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
+                 * We don't need to check the value; it's always URI safe.
+                 */
+                 (ALLOW_DATA_ATTR && DATA_ATTR.test(lcName))
             ) {
                 /* Handle invalid data-* attribute set by try-catching it */
                 try {
-                    /* Sanitize attribute content to be template-safe */
-                    if (SAFE_FOR_TEMPLATES) {
-                        value = value.replace(MUSTACHE_EXPR, ' ');
-                        value = value.replace(ERB_EXPR, ' ');
-                    }
                     currentNode.setAttribute(name, value);
@@ -645,2 +663,3 @@ } catch (e) {}
     DOMPurify.sanitize = function(dirty, cfg) {
+        var body, currentNode, oldNode, nodeIterator, returnNode;
         /* Make sure we have a string to sanitize.
@@ -653,5 +672,9 @@ DO NOT return early, as this will return the wrong type if
 
-        /* Stringify, in case dirty is an array or other object */
+        /* Stringify, in case dirty is an object */
         if (typeof dirty !== 'string') {
-            dirty = dirty.toString();
+            if (typeof dirty.toString !== 'function') {
+                throw new TypeError('toString is not a function');
+            } else {
+                dirty = dirty.toString();
+            }
         }
@@ -661,3 +684,3 @@
         if (!DOMPurify.isSupported) {
-            if (typeof window.toStaticHTML === 'object' 
+            if (typeof window.toStaticHTML === 'object'
                 || typeof window.toStaticHTML === 'function') {
@@ -678,3 +701,3 @@ return window.toStaticHTML(dirty);
         /* Initialize the document to work on */
-        var body = _initDocument(dirty);
+        body = _initDocument(dirty);
 
@@ -687,5 +710,3 @@ /* Check we have a DOM node from the data */
         /* Get node iterator */
-        var currentNode;
-        var oldNode;
-        var nodeIterator = _createIterator(body);
+        nodeIterator = _createIterator(body);
 
@@ -717,3 +738,2 @@ /* Now start iterating over the created document */
         /* Return sanitized string or DOM */
-        var returnNode;
         if (RETURN_DOM) {
@@ -720,0 +740,0 @@

test/test-suite.js

@@ -81,2 +81,3 @@ module.exports = function(DOMPurify, tests, xssTests) {
       assert.equal( DOMPurify.sanitize( '<a>123<% <b>456}}</b><style>{{ alert(1) }}</style>456 %></a>', {SAFE_FOR_TEMPLATES: true}), "<a>123 <b> </b><style> </style> </a>" );
+      assert.equal( DOMPurify.sanitize( '<a href="}}javascript:alert(1)"></a>', {SAFE_FOR_TEMPLATES: true}), "<a></a>" );
   }); 
@@ -83,0 +84,0 @@ QUnit.test( 'Config-Flag tests: SANITIZE_DOM', function(assert) {

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Total package byte prevSize

631637

increased by0.35%

Lines of code

10546

increased by0.28%

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