For signing foxpro application invokes openssl.exe using command:

run openssl rsautl -sign -in rasi.bin -inkey riktest.key -out signed.bin

This requires openssl.exe re-distribution with application.

How to make the same thing, e.q produce signed.bin from rasi.bin using privte key riktest.key without running
external exe file ?
Is there native vfp code wthis implements signing or can windows API called to perform the same thing ?

Posted also in

http://stackoverflow.com/questions/42438407/how-to-sign-without-running-openssl-exe