adding an identity backup

[V0r-T3x]

Description

A backup is created when the keys and fingerprint are generated. If the files are corrupted, the backups are loaded instead of a regenerate it. The pwnagotchi is protected.

Motivation and Context

In some crash cases, the key can be corrupted and the keys need to be generated again.
Pwnagotchi's identity protection commit

• I have raised an issue to propose this change (required)

How Has This Been Tested?

It's already integrated since a while into fancygotchi. It served me well for all the crashed I caused while I developed my new features.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s

[jayofelony]

(f'{self.priv_path}.original')

What does the .original do exactly? Can you explain

And on line 30 there is a typo.

[V0r-T3x]

The backup file are marked with the .original file. They are saved in the same folder /etc/pwnagotchi/

[V0r-T3x]

I voluntary corrupted my id_rsa. here the log:

There is the initial error with the detection of this corrupted key, followed with the loading backup, and the load continue as intended.