require 'gpgme' # # perhaps we want to verify that the key files are actually the key files we expect. # we could use 'file' for this: # # > file ~/.gnupg/00440025.asc # ~/.gnupg/00440025.asc: PGP public key block # # > file ~/.ssh/id_rsa.pub # ~/.ssh/id_rsa.pub: OpenSSH RSA public key # module LeapCli module Commands desc 'Adds a new trusted sysadmin by adding public keys to the "users" directory.' arg_name 'USERNAME' #, :optional => false, :multiple => false command :'add-user' do |c| c.switch 'self', :desc => 'Add yourself as a trusted sysadin by choosing among the public keys available for the current user.', :negatable => false c.flag 'ssh-pub-key', :desc => 'SSH public key file for this new user' c.flag 'pgp-pub-key', :desc => 'OpenPGP public key file for this new user' c.action do |global_options,options,args| username = args.first if !username.any? && !options[:self] help! "Either 'username' or --self is required." end ssh_pub_key = nil pgp_pub_key = nil if options['ssh-pub-key'] ssh_pub_key = read_file!(options['ssh-pub-key']) end if options['pgp-pub-key'] pgp_pub_key = read_file!(options['pgp-pub-key']) end if options[:self] username ||= `whoami`.strip ssh_pub_key ||= pick_ssh_key.to_s pgp_pub_key ||= pick_pgp_key end assert!(ssh_pub_key, 'Sorry, could not find SSH public key.') if ssh_pub_key write_file!([:user_ssh, username], ssh_pub_key) end if pgp_pub_key write_file!([:user_pgp, username], pgp_pub_key) end update_authorized_keys end end # # let the the user choose among the ssh public keys that we encounter, or just pick the key if there is only one. # def pick_ssh_key ssh_keys = [] Dir.glob("#{ENV['HOME']}/.ssh/*.pub").each do |keyfile| ssh_keys << SshKey.load(keyfile) end if `which ssh-add`.strip.any? `ssh-add -L 2> /dev/null`.split("\n").compact.each do |line| key = SshKey.load(line) key.comment = 'ssh-agent' ssh_keys << key unless ssh_keys.include?(key) end end ssh_keys.compact! assert! ssh_keys.any?, 'Sorry, could not find any SSH public key for you. Have you run ssh-keygen?' if ssh_keys.length > 1 key_index = numbered_choice_menu('Choose your SSH public key', ssh_keys.collect(&:summary)) do |line, i| say("#{i+1}. #{line}") end else key_index = 0 end return ssh_keys[key_index] end # # let the the user choose among the gpg public keys that we encounter, or just pick the key if there is only one. # def pick_pgp_key secret_keys = GPGME::Key.find(:secret) if secret_keys.empty? log "Skipping OpenPGP setup because I could not find any OpenPGP keys for you" return nil end assert_bin! 'gpg' if secret_keys.length > 1 key_index = numbered_choice_menu('Choose your OpenPGP public key', secret_keys) do |key, i| key_info = key.to_s.split("\n")[0..1].map{|line| line.sub(/^\s*(sec|uid)\s*/,'')}.join(' -- ') say("#{i+1}. #{key_info}") end else key_index = 0 end key_id = secret_keys[key_index].sha # can't use this, it includes signatures: #puts GPGME::Key.export(key_id, :armor => true, :export_options => :export_minimal) # export with signatures removed: return `gpg --armor --export-options export-minimal --export #{key_id}`.strip end def update_authorized_keys buffer = StringIO.new keys = Dir.glob(path([:user_ssh, '*'])) if keys.empty? bail! "You must have at least one public SSH user key configured in order to proceed. See `leap help add-user`." end keys.sort.each do |keyfile| ssh_type, ssh_key = File.read(keyfile).strip.split(" ") buffer << ssh_type buffer << " " buffer << ssh_key buffer << " " buffer << Path.relative_path(keyfile) buffer << "\n" end write_file!(:authorized_keys, buffer.string) end end end