How can I encode Javascript snippets in widget.jsp?

[#1]

Hi 

I use a lot of Javascript in custom components. Therefor I use custom properties that I added to the custom component's dialog. 

I've found that all properties provided by the user via the component's dialog are encoded in the JSP:

name="${guide:encodeForHtmlAttr(guideField.name,xssAPI)}"

com.adobe.aemds.guide.taglibs.GuideELUtils provides 

    

encodeForHtml(String str, XSSAPI xssapi) 

encodeForHtmlAttr(String str, XSSAPI xssapi) 

but does not provide methods for other encoding recommended by https://www.owasp.org/index.php/OWASP_Java_Encoder_Project#tab=Use_the_Java_Encoder_Project

How can I protect against XSS using the aem toolset?

Thank you, 

Urs

[#2 · Accepted solution]

Hi,

I guess xssAPI.encodeForJSString("") is what you are looking for.

https://docs.adobe.com/docs/en/cq/5-6-1/javadoc/com/adobe/granite/xss/XSSAPI.html#encodeForJSString(...)

Thanks,

Anshika

[#3]

Hi Urs,

The example you gave in your first comment already had the xssAPI instance so I assumed you already have access to it.

However, if you don't, you could either include <%@include file="/libs/granite/ui/global.jsp" %>  or alternatively add  <%@taglib prefix="cq" uri="http://www.day.com/taglibs/cq/1.0" %> in your jsp.

And in case you are asking how to use it within the script in your jsp, attaching a sample below :

<script>xyz.registerConfig("serverUrlConfig", {"contextPath" : "<%=xssAPI.encodeForJSString(contextPath)%>"      } );</script>

Hope that helps.

Thanks,

Anshika

[#4]

Hi Anshika,

sorry to come back to this issue I had no time before. How can I access xssAPI from within widget.jsp in AEM 6.1? 

Thank you,

Urs

[#5]

Hi Anshika

thanks a lot.

That's what I was looking for. 

Thanks,

Urs