linux - Sanity check SSH public key? -


i have asked users public "id_rsa.pub" ssh key, place in "/home/theiraccount/.ssh/authorized_keys", can login server ssh. i'd automate process.

is there anyway sanity check string give me (programmatically or otherwise)? want verify sshd can read text , looks valid public key (and hasn't been corrupted)?

put way, format of id_rsa.pub file? if enters in field can write in form handler script verify complete , correct?

ssh-keygen can used calculate fingerprint of key file, fail if don't pass key:

ssh-keygen -l -f id_rsa.pub

another possibility ssh-vulnkey, have advantage of checking keys against blacklist of known compromised keys @ same time.


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