How to do add signature to file using Apache camel

Question

I need to add signature to a file not on the camel exchange, to a detached file using camel pgp. for example sample.json is plain file. after signing using camel PGP there should be two files, one is sample.json and sample.signed

Answer 1

One approach is described here

The filename / file extension could be edited before using the file producer like this:

.setHeader(Exchange.FILE_NAME, constant(filenameWithoutExtension + '.signed'))