From f7c2ccbe26dc808e4a7eae9a378e6c382220961a Mon Sep 17 00:00:00 2001
From: Simponic <loganhunt@simponic.xyz>
Date: Thu, 22 Dec 2022 15:27:55 -0700
Subject: [PATCH] Remove shell and esshd - moving to erlang ssh server

---
 config/config.exs           | 12 +++------
 config/test.exs             |  4 +--
 lib/chessh/auth/keys.ex     |  1 -
 lib/chessh/auth/password.ex |  1 -
 lib/chessh/shell.ex         | 51 -------------------------------------
 lib/chessh/ssh/server.ex    |  0
 mix.exs                     |  3 +--
 7 files changed, 6 insertions(+), 66 deletions(-)
 delete mode 100644 lib/chessh/shell.ex
 create mode 100644 lib/chessh/ssh/server.ex

diff --git a/config/config.exs b/config/config.exs
index 6fb4258..daffcad 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -1,15 +1,9 @@
 import Config
 
-config :chessh, ecto_repos: [Chessh.Repo]
-
-config :esshd,
-  enabled: true,
+config :chessh,
+  ecto_repos: [Chessh.Repo],
   priv_dir: Path.join(Path.dirname(__DIR__), "priv/keys"),
-  handler: {Chessh.Shell, :on_shell, 4},
   port: 42069,
-  password_authenticator: Chessh.Auth.PasswordAuthenticator,
-  public_key_authenticator: Chessh.Auth.KeyAuthenticator,
-  # TODO - benchmark
-  max_sessions: 128
+  max_sessions: 255
 
 import_config "#{config_env()}.exs"
diff --git a/config/test.exs b/config/test.exs
index 6ade5f8..c1d70dd 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -7,5 +7,5 @@ config :chessh, Chessh.Repo,
   hostname: "localhost",
   pool: Ecto.Adapters.SQL.Sandbox
 
-config :esshd,
-  priv_dir: Path.join(Path.dirname(__DIR__), "priv/test_keys")
+config :chessh,
+  priv_dir: Path.join(Path.dirname(__DIR__), "priv/keys")
diff --git a/lib/chessh/auth/keys.ex b/lib/chessh/auth/keys.ex
index e90f101..a29d169 100644
--- a/lib/chessh/auth/keys.ex
+++ b/lib/chessh/auth/keys.ex
@@ -1,6 +1,5 @@
 defmodule Chessh.Auth.KeyAuthenticator do
   alias Chessh.{Key, Repo}
-  use Sshd.PublicKeyAuthenticator
   import Ecto.Query
 
   def authenticate(username, public_key) do
diff --git a/lib/chessh/auth/password.ex b/lib/chessh/auth/password.ex
index e2c26d6..8a6c683 100644
--- a/lib/chessh/auth/password.ex
+++ b/lib/chessh/auth/password.ex
@@ -1,7 +1,6 @@
 defmodule Chessh.Auth.PasswordAuthenticator do
   alias Chessh.Player
   alias Chessh.Repo
-  use Sshd.PasswordAuthenticator
 
   def authenticate(username, password) do
     case Repo.get_by(Player, username: String.Chars.to_string(username)) do
diff --git a/lib/chessh/shell.ex b/lib/chessh/shell.ex
deleted file mode 100644
index cf65ad4..0000000
--- a/lib/chessh/shell.ex
+++ /dev/null
@@ -1,51 +0,0 @@
-defmodule Chessh.Shell do
-  use Sshd.ShellHandler
-
-  def on_shell(_username, _pubkey, _ip, _port) do
-    IO.puts("Looks like you're on #{inspect(self())}")
-    loop()
-  end
-
-  def on_connect(username, ip, port, method) do
-    Logger.debug(fn ->
-      """
-      Incoming SSH shell #{inspect(self())} requested for #{username} from #{inspect(ip)}:#{inspect(port)} using #{inspect(method)}
-      """
-    end)
-  end
-
-  def on_disconnect(username, ip, port) do
-    Logger.debug(fn ->
-      "Disconnecting SSH shell for #{username} from #{inspect(ip)}:#{inspect(port)}"
-    end)
-  end
-
-  defp loop() do
-    self_pid = self()
-    IO.write([IO.ANSI.home(), IO.ANSI.clear()])
-    IO.puts("#{inspect(:io.columns())}")
-    IO.puts("#{inspect(:io.rows())}")
-    input = spawn(fn -> io_get(self_pid) end)
-    wait_input(input)
-  end
-
-  defp wait_input(input) do
-    receive do
-      {:hello, message} ->
-        IO.puts(message)
-        loop()
-
-      {:input, ^input, x} ->
-        IO.puts(x)
-        loop()
-
-      x ->
-        Logger.debug(inspect(x))
-        loop()
-    end
-  end
-
-  defp io_get(pid) do
-    send(pid, {:input, self(), IO.gets("")})
-  end
-end
diff --git a/lib/chessh/ssh/server.ex b/lib/chessh/ssh/server.ex
new file mode 100644
index 0000000..e69de29
diff --git a/mix.exs b/mix.exs
index 0a40f28..4d91dd2 100644
--- a/mix.exs
+++ b/mix.exs
@@ -17,7 +17,7 @@ defmodule Chessh.MixProject do
   def application do
     [
       mod: {Chessh.Application, []},
-      extra_applications: [:esshd, :logger]
+      extra_applications: [:logger, :crypto, :ssh]
     ]
   end
 
@@ -28,7 +28,6 @@ defmodule Chessh.MixProject do
   defp deps do
     [
       {:chess, "~> 0.4.1"},
-      {:esshd, "~> 0.2.1"},
       {:ecto, "~> 3.9"},
       {:ecto_sql, "~> 3.9"},
       {:postgrex, "~> 0.16.5"},