How to convert an ASCII string to base64 in XSL without extensions?

Question

Using Java extensions, converting an ASCII string to base64 in XSL is simple. But bug JDK-8004476 prevents extension from working if your application is launched via webstart. Is there any other mechanism that can convert to base64 that I could implement in XSL?

Answer 1

You have tagged your question as XSLT 2.0, the commercial versions of one of the Java XSLT 2.0 processors, namely Saxon 9, provide http://www.saxonica.com/documentation/index.html#!functions/saxon/string-to-base64Binary. Or which Java XSLT 2.0 processor do you use?