Integration Services :: Process Data In-memory From A Script

I have worked in other ETL tools. So, i am trying to figure out how to do thefile decryption and process the data in memory using SSIS.I am using SSIS on Azure VM and my source files are on Azure storage. The files are encrypted and we are trying to use Phython script to decrypt the files and pass it to SSIS. I found out that Execute Process task can call the Phython script. However, i would like to get the decrypted data from the file and pass it to the next task (control flow) in SSIS without saving it as a file (in-memory). I found that execute process task output can be stored as a Standard Output Variable  or to an object. Will this work or do I need to follow any other methods (since we need the entire file to be sent for additional processing).