[SOLVED] Identification of Github ssh

validator456 · 02-12-2019, 08:09 AM

I have setup a Github ssh key according to instructions. I did the same for Gitlab, also according to instructions. And it works.
But what I would like to know is what pubkey of Github is related to what files on my harddisk.
In other words, can I identify what private keys on my harddisk relates to the Github pub key on Github?

Turbocapitalist · 02-12-2019, 08:14 AM

Yes, you can match a private key on your disk with the public key uploaded to GitLab or whatever.

Which instructions did you follow? What was the file name after the -f option when you used ssh-keygen to make the key pair in the first place?

validator456 · 02-12-2019, 02:12 PM

Well, the name is the problem of course. My Github key gives a line like bc:27:ac:34: etc.

That doesn't offer much of identification. Isn't there a command line command that I can use so that I can identify which public key is used in Github? And not based on name?

Turbocapitalist · 02-12-2019, 02:23 PM

Quote:

Originally Posted by validator456

Well, the name is the problem of course. My Github key gives a line like bc:27:ac:34: etc.

That would be the fingerprint in the form of an MD5 checksum, a outdated format. SHA256 is the current best practice. However, be that as it may, you can use ssh-keygen to check your existing keys and display their fingerprints. Then you can manually find a match and rename the key files to something more mnemonic.

Code:

for f in ~/.ssh/*.pub; 
do 
        echo
        echo $f
        ssh-keygen -E md5 -lf $f; 
done

validator456 · 02-13-2019, 01:14 PM

Thank you, turbocapitalist. I am going to try it.

validator456 · 03-12-2019, 04:31 AM

That worked splendidly. Thanks again, Turbocapitalist.