The rust rewrite of
update-ssh-keys is now in a stable state. This tool replaces the bash script by the same name which used to be in coreos/init (removed in coreos/init#256), as well as the go library which used to be in this repository.
If you would like to continue to use the go library, it is recommended that you pull the source code into your own repository. You can pull the go code from this git tree at commit 96fe9ef.