add encryption and file signing

[reactive-firewall]

All files should be signed (at least detached for integrity checking) and configuration files should be encrypted

• [ ] file signing code utils
• [x] file encryption code utils
• [ ] all files signed

[reactive-firewall]

Also:

• [ ] encryption MUST support post quantum computing secure algorithms

[reactive-firewall]

• [ ] need to have a way to automate encryption
  • [ ] password automation
  • [ ] cryptographic key automation