Request: backup decryption guide

I’m reading around the documentation and found this:

https://docs.crp.to/security.html#how-backup

I was wondering: is there a way to manually decrypt the backups? I’m curious to find out what exactly is being backed up.

So far I’ve Base64 decoded the backup and saved it as a .bin, what next? Can I just feed it to a program and enter the passphrase to decode it?