tmate-ssh-server.nix

import ./make-test-python.nix (
  { pkgs, lib, ... }:
  let
    inherit (import ./ssh-keys.nix pkgs)
      snakeOilPrivateKey
      snakeOilPublicKey
      ;

    setUpPrivateKey = name: ''
      ${name}.succeed(
          "mkdir -p /root/.ssh",
          "chmod 700 /root/.ssh",
          "cat '${snakeOilPrivateKey}' > /root/.ssh/id_snakeoil",
          "chmod 600 /root/.ssh/id_snakeoil",
      )
      ${name}.wait_for_file("/root/.ssh/id_snakeoil")
    '';

    sshOpts = "-oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oIdentityFile=/root/.ssh/id_snakeoil";

  in
  {
    name = "tmate-ssh-server";
    nodes = {
      server =
        { ... }:
        {
          services.tmate-ssh-server = {
            enable = true;
            port = 2223;
            openFirewall = true;
          };
        };
      client =
        { ... }:
        {
          environment.systemPackages = [ pkgs.tmate ];
          services.openssh.enable = true;
          users.users.root.openssh.authorizedKeys.keys = [ snakeOilPublicKey ];
        };
      client2 =
        { ... }:
        {
          environment.systemPackages = [ pkgs.openssh ];
        };
    };
    testScript = ''
      start_all()

      server.wait_for_unit("tmate-ssh-server.service")
      server.wait_for_open_port(2223)
      server.wait_for_file("/etc/tmate-ssh-server-keys/ssh_host_ed25519_key.pub")
      server.wait_for_file("/etc/tmate-ssh-server-keys/ssh_host_rsa_key.pub")
      server.succeed("tmate-client-config > /tmp/tmate.conf")
      server.wait_for_file("/tmp/tmate.conf")

      ${setUpPrivateKey "server"}
      client.wait_for_unit("sshd.service")
      client.wait_for_open_port(22)
      server.succeed("scp ${sshOpts} /tmp/tmate.conf client:/tmp/tmate.conf")

      client.wait_for_file("/tmp/tmate.conf")
      client.wait_until_tty_matches("1", "login:")
      client.send_chars("root\n")
      client.sleep(2)
      client.send_chars("tmate -f /tmp/tmate.conf\n")
      client.sleep(2)
      client.send_chars("q")
      client.sleep(2)
      client.send_chars("tmate display -p '#{tmate_ssh}' > /tmp/ssh_command\n")
      client.wait_for_file("/tmp/ssh_command")
      ssh_cmd = client.succeed("cat /tmp/ssh_command")

      client2.succeed("mkdir -p ~/.ssh; ssh-keyscan -4 -p 2223 server > ~/.ssh/known_hosts")
      client2.wait_until_tty_matches("1", "login:")
      client2.send_chars("root\n")
      client2.sleep(2)
      client2.send_chars(ssh_cmd.strip() + "\n")
      client2.sleep(2)
      client2.send_chars("touch /tmp/client_2\n")

      client.wait_for_file("/tmp/client_2")
    '';
  }
)