jarsigner: unable to open jar file

[polurud]

I am able to execute the code but the output files are not in correct format. I'm getting the following error: jarsigner: unable to open jar file
I think the error is due to the code:
popen('jarsigner -sigalg MD5withRSA -digestalg SHA1 -keystore ' + obfuscator_resource_dir + '/resignKey.keystore -storepass resignKey ' + sample_file_name + ' resignKey')

Also, do I need to update any packages/dependencies for SHA256 instead of SHA1?

Thanks

[ICommandMachinesObey]

How did you executed the scripts which command you used?