Using Cripto.js inside a xfa form

Hi Guys,  Do you know if cripto.js or any js encryption library can be used inside a PDF XFA in order to use SHA 1 to encrypt some data fields in the form and add the result to a PDF417 Barcode? 

I know that we can implement js in LC Designer using the script object: http://help.adobe.com/en_US/livecycle/11.0/DesignerScriptingBasics/WS92d06802c76abadb39b52 36b129f6917ab6-7fd5.2.html

but I don't know if this will work with complex JS functions...? 

Thanks in advance for your help,