[Feature request] Display more infos about the ehc_msg

[Cqoicebordel]

Right now, the only info about the ehc COSE message displayed is the payload.

Having access to the signature and, more generally, what is available outside of the payload would be very welcome.

Note that I'm not sure of anything at this point. I don't know what is actually accessible in the ehc qr code itself. That's why I love your script, as it allows me to follow by "hand" what is done to verify an ehc.
Except for the signature part, that's why I filing this FR :)

[panzi]

I think the only other info in the COSE message is the signature algorithm, which I think should be always the same as in the certificate public key? Well, I just added printing that.

[panzi]

Ok, there is the signature itself. But that's a bit long and would kinda overflow the output. Maybe I can add an option for that.

[Cqoicebordel]

Yeah, that's what I thought : the certificate (as in certs) had to validate… something in the ehc, and that something wasn't visible anywhere. So that was a piece of the puzzle missing. I guessed it would be a signature, but wasn't sure if only that.

In any case, yeah, if you are willing, an option would be good for that. Even outputing to a file would be good :)

[panzi]

I'm displaying more now (though the x509 certificate extensions in not really a nice way).