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Difference between revisions of "OWASP Java HTML Sanitizer Project"

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Project Leader: [https://www.owasp.org/index.php/User:Mike_Samuel Mike Samuel]
 
Project Leader: [https://www.owasp.org/index.php/User:Mike_Samuel Mike Samuel]
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Contributors: Jim Manico<br/>
 
Contributors: Jim Manico<br/>
  

Revision as of 22:20, 4 March 2014

OWASP Project Header.jpg

OWASP HTML Sanitizer Project

The OWASP HTML Sanitizer is a fast and easy to configure HTML Sanitizer written in Java which lets you include HTML authored by third-parties in your web application while protecting against XSS. The existing dependencies are on guava and JSR 305. The other jars are only needed by the test suite. The JSR 305 dependency is a compile-only dependency, only needed for annotations. This code was written with security best practices in mind, has an extensive test suite, and has undergone adversarial security review. A great place to get started using the OWASP Java HTML Sanitizer is here: https://code.google.com/p/owasp-java-html-sanitizer/wiki/GettingStarted.

Benefits

  • Provides 4X the speed of AntiSamy sanitization in DOM mode and 2X the speed of AntiSamy in SAX mode.
  • Very easy to use. It allows for simple programmatic POSITIVE policy configuration (see below). No XML config.
  • Actively maintained by Mike Samuel from Google's AppSec team!
  • Passing 95+% of AntiSamy's unit tests plus many more.
  • This is code from the Caja project that was donated by Google. It is rather high performance and low memory utilization.
  • Java 1.5+

Licensing

The OWASP HTML Sanitizer is free to use under the Apache 2 License.

What is this?

The OWASP HTML Sanitizer Projects provides:

  • Java based HTML sanitization of untrusted HTML!

Code Repo

OWASP HTML Sanitizer at Google Code

Email List

Project Email List

Project Leader

Project Leader: Mike Samuel
Contributors: Jim Manico

Related Projects

Quick Download

News and Events

  • [3 Mar 2014] 226 Released
  • [5 Feb 2014] New Wiki
  • [4 Sept 2013] 209 Released

Change Log

For recent release notes, please visit the changelog on Google Code.

Classifications

Owasp-incubator-trans-85.png Owasp-builders-small.png
Owasp-defenders-small.png
Apache 2 License
Project Type Files CODE.jpg

You can use prepackaged policies here: http://owasp-java-html-sanitizer.googlecode.com/svn/trunk/distrib/javadoc/org/owasp/html/Sanitizers.html. 

PolicyFactory policy = Sanitizers.FORMATTING.and(Sanitizers.LINKS);
String safeHTML = policy.sanitize(untrustedHTML);

or the tests show how to configure your own policy here: http://code.google.com/p/owasp-java-html-sanitizer/source/browse/trunk/src/tests/org/owasp/html/HtmlPolicyBuilderTest.java 

PolicyFactory policy = new HtmlPolicyBuilder()
   .allowElements("a")
   .allowUrlProtocols("https")
   .allowAttributes("href").onElements("a")
   .requireRelNofollowOnLinks()
   .build();
String safeHTML = policy.sanitize(untrustedHTML);

or you can write custom policies to do things like changing h1s to divs with a certain class: 

PolicyFactory policy = new HtmlPolicyBuilder()
   .allowElements("p")
   .allowElements(
       new ElementPolicy() {
         public String apply(String elementName, List<String> attrs) {
           attrs.add("class");
           attrs.add("header-" + elementName);
           return "div";
         }
       }, "h1", "h2", "h3", "h4", "h5", "h6"))
   .build();
String safeHTML = policy.sanitize(untrustedHTML);
Retrieved from "https://wiki.owasp.org/index.php?title=OWASP_Java_HTML_Sanitizer_Project&oldid=169465"