BUG #15895: pg_dump execution with OpenSSL encryption from Windows Service application

The following bug has been logged on the website:

Bug reference: 15895
Logged by: Ervin Nagy
Email address: nagy(dot)ervin(dot)rn(at)gmail(dot)com
PostgreSQL version: 10.4
Operating system: Windows 10 -64 /x64
Description:

Hi,

We would like to make some Postgres databases backups from a windows service
application, using OpenSSL app to encrypt those files. To accomplish that we
use a batch file, containing that command lines. If we do it in two steps,
first we make the backup file and after that we want to encrypt it or even
when we include in Postgres "pg_dump" instructions it doesn't work, I
presume because the service app is running as SYSTEM. If I run the same
application as desktop mode it works fine.

Is there any workaround that can help us to do that?

Thank you. Regards.