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I’m wondering, how Github is able to handle so many public keys, which are used for authenticating over ssh.
One user owns aprox 3 certificates and how many users are on Github – millions? Easy multiplication gives us millions of certificates. It isn’t in one .ssh/authorized_keys file for user git I guess, right?
They have own ssh server implemented, or exists any mod for OpenSSH solving this kind of problem?
Thanks.
They have patched sshd to lookup key in the MySQL database:
https://github.com/blog/530-how-we-made-github-fast