No SSH pub key content or fingerprint in WebUI

[webteam-app]

Bug originally filed by nobuto at https://bugs.launchpad.net/bugs/1994943

MAAS can manage SSH keys for a user, but it doesn't show the content of public keys nor fingerprint. That makes key management hard like users are not able to distinguish keys precisely other than the comment.

Would be nice to a capability to reveal either the full content of a pub key or a fingerprint (ssh-keygen -l).

For the record, an API request can reveal the full content.

$ maas admin sshkeys read
Success.
Machine-readable output follows:
[
{
"key": "ssh-ed25519 (...) ubuntu@maas",
"id": 1,
"keysource": "",
"resource_uri": "/MAAS/api/2.0/account/prefs/sshkeys/1/"
}
]

[tmerten]

(targets 3.4 now)

In terms of UX this is currently showing the head of the key, whereas the tail usually has the useful info to distinguish the keys.

We could either show the tail or show head and tail and cut out the middle. Personally I have a tendency to the latter.

[nobuto-m]

There is a way to generate a fingerprint as a part of OpenSSH (ssh-keygen -l) so the column width doesn't have to be the full length of the key content (head or tail is not a correct way of distinguishing keys from a technical point of view).

I prefer seeing a key comment if exists, a fingerprint if not. Then the full content in a hover pop-up or something.