A small shellscript for use as an AuthorizedKeyCommand to support authentication into SSH servers from GitHub's authorized key list.

For use in internally accessible LAN servers only.

Get the script:

# Fetch the script into `/usr/local/bin`:
$ sudo wget https://raw.githubusercontent.com/dan1elhughes/auth/master/auth.sh -O /usr/local/bin/auth

# Enable the script
$ sudo chmod 755 /usr/local/bin/auth

Enable the cache file (contents are globally editable on the server, so only use this on LAN-only boxes on networks you trust)

$ sudo touch /tmp/keycache
$ sudo chown nobody: /tmp/keycache
$ sudo chmod 755 /tmp/keycache

In /etc/ssh/sshd_config, add:

AuthorizedKeysCommand /usr/local/bin/auth
AuthorizedKeysCommandUser nobody

Restart SSH:

$ sudo service sshd restart