apps/amethyst/lib/apps/connection_handler.ex

@@ -105,7 +105,7 @@ defmodule Amethyst.ConnectionHandler do
         end
         loop(socket, connstate, version, state)
       {:send_packet, packet} ->
-        # Logger.debug("Sending packet #{inspect(packet)}")
+        Logger.debug("Sending packet #{inspect(packet)}")
         send_packet(socket, connstate, packet, version, state)
         loop(socket, connstate, version, state)
       after 0 ->
@@ -258,6 +258,7 @@ defmodule Amethyst.ConnectionHandler do
   defp send_packet(socket, connstate, packet, version, state) do
     try do
       data = connstate.serialize(packet, version)
+      Logger.debug("#{inspect(Map.get(state, :compression))}")
       container = if Map.get(state, :compression) == nil do
         # Packet ID is included in data
         Write.varint(byte_size(data)) <> data
@@ -272,6 +273,7 @@ defmodule Amethyst.ConnectionHandler do
           Write.varint(byte_size(compressed)) <> compressed
         end
       end
+      Logger.debug(inspect(container))
       encrypted = if Map.get(state, :encryption_state) == nil do
         container
       else

apps/amethyst/lib/sha1.ex

@@ -1,26 +0,0 @@
-# Amethyst - An experimental Minecraft server written in Elixir.
-# Copyright (C) 2024 KodiCraft
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-defmodule Amethyst.Minecraft.Sha1 do
-  @moduledoc """
-  This module implements the awkward non-standard hex digest hash that Minecraft uses
-  """
-  def hash(input) do
-    # this sucks but so does the fact that mojang makes me do this so it fits
-    <<number::integer-signed-size(20*8)>> = :crypto.hash(:sha, input)
-    inspect(number, base: :hex) |> String.replace("0x", "") |> String.downcase()
-  end
-end

apps/amethyst/lib/states/configuration.ex

@@ -310,16 +310,6 @@ defmodule Amethyst.ConnectionState.Configuration do
           chunk_z: div(floor(z), 16)
         }})
         send(self(), {:set_position, {x, y, z}})
-        send(self(), {:send_packet, %{packet_type: :player_info_update_add_player,
-          players: [
-            %{
-              uuid: Map.get(state, :uuid),
-              name: Map.get(state, :name),
-              properties: Map.get(state, :properties) |>
-                Enum.map(fn prop -> %{name: prop["name"], value: prop["value"], signature: Map.get(prop, "signature")} end)
-            }
-          ]
-        }})
         # Begin keepalive loop
         # TODO: Put it under some supervisor
         me = self()

apps/amethyst/lib/states/login.ex

@@ -97,41 +97,14 @@ defmodule Amethyst.ConnectionState.Login do
         send(self(), {:set_compression, threshold})
       end
 
-      if Application.get_env(:amethyst, :auth, false) == false do
+      send(self(), {:send_packet, %{
-        # Don't check authentication
+        packet_type: :login_success,
-        send(self(), {:send_packet, %{
+        uuid: Map.get(state, :uuid),
-          packet_type: :login_success,
+        username: Map.get(state, :name),
-          uuid: Map.get(state, :uuid),
+        properties: [],
-          username: Map.get(state, :name),
+        strict_error_handling: true
-          properties: [],
+      }})
-          strict_error_handling: true
+      :ok
-        }})
-        Map.put(state, :authenticated, false)
-      else
-        # Check authentication
-        pubkey = Amethyst.Keys.get_pub()
-        hash = Amethyst.Minecraft.Sha1.hash(secret <> pubkey)
-        url = Application.get_env(:amethyst, :session_server, "https://sessionserver.mojang.com") <> "/session/minecraft/hasJoined?username=" <>
-          Map.get(state, :name) <> "&serverId=" <> hash # I don't think we need to verify the IP in the use case of Amethyst...
-
-        response = Req.get!(url,
-        headers: [
-          {"user-agent", "Amethyst/1.0"}
-        ]).body
-
-        <<c1::binary-size(8), c2::binary-size(4), c3::binary-size(4), c4::binary-size(4), c5::binary>> = response["id"]
-        uuid = [c1, c2, c3, c4, c5] |> Enum.join("-")
-
-        send(self(), {:send_packet, %{
-          packet_type: :login_success,
-          uuid: uuid,
-          username: response["name"],
-          properties: response["properties"] |>
-            Enum.map(fn prop -> %{name: prop["name"], value: prop["value"], signature: Map.get(prop, "signature")} end),
-          strict_error_handling: true
-        }})
-        Map.put(state, :authenticated, true) |> Map.put(:uuid, uuid) |> Map.put(:name, response["name"]) |> Map.put(:properties, response["properties"])
-      end
     else
       raise RuntimeError, "Invalid verify token. Broken encryption?"
     end

apps/amethyst/lib/states/macros.ex

@@ -95,7 +95,7 @@ defmodule Amethyst.ConnectionState.Macros do
           Enum.reduce(Map.get(packet, name), "", fn item, acc ->
               acc <> write_signature(item, signature)
           end)
-        {:literal, type, value} -> acc <> apply(Write, type, [value])
+        {:literal, {type, value}} -> acc <> apply(Write, type, [value])
         t -> acc <> apply(Write, t, [Map.get(packet, name)])
       end
     end)
@@ -106,7 +106,7 @@ defmodule Amethyst.ConnectionState.Macros do
       Enum.all?(signature, fn {name, type} ->
         case Map.get(packet, name, :missing) do
           :missing ->
-            if is_tuple(type) && elem(type, 0) == :literal do
+            if elem(type, 0) == :literal do
               true
             else
               throw {:missing, name}

apps/amethyst/lib/states/play.ex

@@ -71,8 +71,8 @@ defmodule Amethyst.ConnectionState.Play do
     portal_cooldown: :varint,
     enforces_secure_chat: :bool,
   ]
-  Macros.defpacket_clientbound :player_info_update_add_player, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_add_player, 0x2E, 767, [
-    actions: {:literal, :byte, 0x01},
+    actions: {:literal, 0x01},
     players: {:array, [
       uuid: :uuid,
       name: :string,
@@ -83,8 +83,8 @@ defmodule Amethyst.ConnectionState.Play do
       ]}
     ]}
   ]
-  Macros.defpacket_clientbound :player_info_update_initialize_chat, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_initialize_chat, 0x2E, 767, [
-    actions: {:literal, :byte, 0x02},
+    actions: {:literal, 0x02},
     players: {:array, [
       uuid: :uuid,
       data: {:optional, {:compound, [
@@ -95,29 +95,29 @@ defmodule Amethyst.ConnectionState.Play do
       ]}}
     ]}
   ]
-  Macros.defpacket_clientbound :player_info_update_update_game_mode, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_update_game_mode, 0x2E, 767, [
-    actions: {:literal, :byte, 0x04},
+    actions: {:literal, 0x04},
     players: {:array, [
       uuid: :uuid,
       gamemode: :varint
     ]}
   ]
-  Macros.defpacket_clientbound :player_info_update_update_listed, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_update_listed, 0x2E, 767, [
-    actions: {:literal, :byte, 0x08},
+    actions: {:literal, 0x08},
     players: {:array, [
       uuid: :uuid,
       listed: :bool
     ]}
   ]
-  Macros.defpacket_clientbound :player_info_update_update_latency, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_update_latency, 0x2E, 767, [
-    actions: {:literal, :byte, 0x10},
+    actions: {:literal, 0x10},
     players: {:array, [
       uuid: :uuid,
       ping: :varint, # Milliseconds
     ]}
   ]
-  Macros.defpacket_clientbound :player_info_update_update_display_name, 0x3E, 767, [
+  Macros.defpacket_clientbound :player_info_update_update_display_name, 0x2E, 767, [
-    actions: {:literal, :byte, 0x20},
+    actions: {:literal, 0x20},
     players: {:array, [
       uuid: :uuid,
       display_name: {:optional, :nbt}

apps/amethyst/mix.exs

@@ -39,8 +39,7 @@ defmodule Amethyst.MixProject do
       {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
       {:uuid, "~> 1.1"},
       {:ex_doc, "~> 0.22", only: :dev, runtime: false},
-      {:jason, "~> 1.4"},
+      {:jason, "~> 1.4"}
-      {:req, "~> 0.5.6", runtime: true}
     ]
   end
 end

apps/amethyst/test/hash_test.exs

@@ -1,10 +0,0 @@
-defmodule Sha1Test do
-  alias Amethyst.Minecraft.Sha1
-  use ExUnit.Case, async: true
-
-  test "Mojang sha1 hash digest" do
-    assert Sha1.hash("Notch") == "4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48"
-    assert Sha1.hash("jeb_") == "-7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1"
-    assert Sha1.hash("simon") == "88e16a1019277b15d58faf0541e11910eb756f6"
-  end
-end

config/runtime.exs

@@ -3,7 +3,6 @@ import Config
 config :amethyst,
   port: 25599, # Bogus port for testing, avoids unexpected conflicts
   encryption: true, # Whether or not to request encryption from clients.
-  auth: true, # Whether or not users should be authenticated with Mojang.
+  auth: false, # Whether or not users should be authenticated with Mojang.
-  session_server: "https://sessionserver.mojang.com", # Base URL to the Mojang session server
   compression: 256, # Packets larger than this amount are sent compressed. Set to nil to disable compression.
   default_game: Example.Game # Which game new players should be sent to

mix.lock

@@ -5,19 +5,11 @@
   "elixir_math": {:hex, :elixir_math, "0.1.2", "5655bdf7f34e30906f31cdcf3031b43dd522ce8d2936b60ad4696b2c752bf5c9", [:mix], [], "hexpm", "34f4e4384903097a8ec566784fa8e9aa2b741247d225741f07cc48250c2aa64c"},
   "ex_doc": {:hex, :ex_doc, "0.34.2", "13eedf3844ccdce25cfd837b99bea9ad92c4e511233199440488d217c92571e8", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "5ce5f16b41208a50106afed3de6a2ed34f4acfd65715b82a0b84b49d995f95c1"},
   "file_system": {:hex, :file_system, "1.0.1", "79e8ceaddb0416f8b8cd02a0127bdbababe7bf4a23d2a395b983c1f8b3f73edd", [:mix], [], "hexpm", "4414d1f38863ddf9120720cd976fce5bdde8e91d8283353f0e31850fa89feb9e"},
-  "finch": {:hex, :finch, "0.19.0", "c644641491ea854fc5c1bbaef36bfc764e3f08e7185e1f084e35e0672241b76d", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.6.2 or ~> 1.7", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 1.1", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "fc5324ce209125d1e2fa0fcd2634601c52a787aff1cd33ee833664a5af4ea2b6"},
-  "hpax": {:hex, :hpax, "1.0.0", "28dcf54509fe2152a3d040e4e3df5b265dcb6cb532029ecbacf4ce52caea3fd2", [:mix], [], "hexpm", "7f1314731d711e2ca5fdc7fd361296593fc2542570b3105595bb0bc6d0fad601"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "makeup": {:hex, :makeup, "1.1.2", "9ba8837913bdf757787e71c1581c21f9d2455f4dd04cfca785c70bbfff1a76a3", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cce1566b81fbcbd21eca8ffe808f33b221f9eee2cbc7a1706fc3da9ff18e6cac"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.2", "627e84b8e8bf22e60a2579dad15067c755531fea049ae26ef1020cad58fe9578", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "41193978704763f6bbe6cc2758b84909e62984c7752b3784bd3c218bb341706b"},
   "makeup_erlang": {:hex, :makeup_erlang, "1.0.1", "c7f58c120b2b5aa5fd80d540a89fdf866ed42f1f3994e4fe189abebeab610839", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "8a89a1eeccc2d798d6ea15496a6e4870b75e014d1af514b1b71fa33134f57814"},
-  "mime": {:hex, :mime, "2.0.6", "8f18486773d9b15f95f4f4f1e39b710045fa1de891fada4516559967276e4dc2", [:mix], [], "hexpm", "c9945363a6b26d747389aac3643f8e0e09d30499a138ad64fe8fd1d13d9b153e"},
-  "mint": {:hex, :mint, "1.6.2", "af6d97a4051eee4f05b5500671d47c3a67dac7386045d87a904126fd4bbcea2e", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1 or ~> 0.2.0 or ~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "5ee441dffc1892f1ae59127f74afe8fd82fda6587794278d924e4d90ea3d63f9"},
-  "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.0", "51f9b613ea62cfa97b25ccc2c1b4216e81df970acd8e16e8d1bdc58fef21370d", [:mix], [], "hexpm", "9c565862810fb383e9838c1dd2d7d2c437b3d13b267414ba6af33e50d2d1cf28"},
-  "nimble_pool": {:hex, :nimble_pool, "1.1.0", "bf9c29fbdcba3564a8b800d1eeb5a3c58f36e1e11d7b7fb2e084a643f645f06b", [:mix], [], "hexpm", "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a"},
   "pre_commit": {:hex, :pre_commit, "0.3.4", "e2850f80be8090d50ad8019ef2426039307ff5dfbe70c736ad0d4d401facf304", [:mix], [], "hexpm", "16f684ba4f1fed1cba6b19e082b0f8d696e6f1c679285fedf442296617ba5f4e"},
-  "req": {:hex, :req, "0.5.6", "8fe1eead4a085510fe3d51ad854ca8f20a622aae46e97b302f499dfb84f726ac", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.17", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 2.0.6 or ~> 2.1", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "cfaa8e720945d46654853de39d368f40362c2641c4b2153c886418914b372185"},
-  "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
   "uuid": {:hex, :uuid, "1.1.8", "e22fc04499de0de3ed1116b770c7737779f226ceefa0badb3592e64d5cfb4eb9", [:mix], [], "hexpm", "c790593b4c3b601f5dc2378baae7efaf5b3d73c4c6456ba85759905be792f2ac"},
 }

mix.nix

@@ -47,19 +47,6 @@ let
       beamDeps = [];
     };
 
-    elixir_math = buildMix rec {
-      name = "elixir_math";
-      version = "0.1.2";
-
-      src = fetchHex {
-        pkg = "elixir_math";
-        version = "${version}";
-        sha256 = "34f4e4384903097a8ec566784fa8e9aa2b741247d225741f07cc48250c2aa64c";
-      };
-
-      beamDeps = [];
-    };
-
     ex_doc = buildMix rec {
       name = "ex_doc";
       version = "0.34.2";
@@ -86,32 +73,6 @@ let
       beamDeps = [];
     };
 
-    finch = buildMix rec {
-      name = "finch";
-      version = "0.19.0";
-
-      src = fetchHex {
-        pkg = "finch";
-        version = "${version}";
-        sha256 = "fc5324ce209125d1e2fa0fcd2634601c52a787aff1cd33ee833664a5af4ea2b6";
-      };
-
-      beamDeps = [ mime mint nimble_options nimble_pool telemetry ];
-    };
-
-    hpax = buildMix rec {
-      name = "hpax";
-      version = "1.0.0";
-
-      src = fetchHex {
-        pkg = "hpax";
-        version = "${version}";
-        sha256 = "7f1314731d711e2ca5fdc7fd361296593fc2542570b3105595bb0bc6d0fad601";
-      };
-
-      beamDeps = [];
-    };
-
     jason = buildMix rec {
       name = "jason";
       version = "1.4.4";
@@ -164,45 +125,6 @@ let
       beamDeps = [ makeup ];
     };
 
-    mime = buildMix rec {
-      name = "mime";
-      version = "2.0.6";
-
-      src = fetchHex {
-        pkg = "mime";
-        version = "${version}";
-        sha256 = "c9945363a6b26d747389aac3643f8e0e09d30499a138ad64fe8fd1d13d9b153e";
-      };
-
-      beamDeps = [];
-    };
-
-    mint = buildMix rec {
-      name = "mint";
-      version = "1.6.2";
-
-      src = fetchHex {
-        pkg = "mint";
-        version = "${version}";
-        sha256 = "5ee441dffc1892f1ae59127f74afe8fd82fda6587794278d924e4d90ea3d63f9";
-      };
-
-      beamDeps = [ hpax ];
-    };
-
-    nimble_options = buildMix rec {
-      name = "nimble_options";
-      version = "1.1.1";
-
-      src = fetchHex {
-        pkg = "nimble_options";
-        version = "${version}";
-        sha256 = "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44";
-      };
-
-      beamDeps = [];
-    };
-
     nimble_parsec = buildMix rec {
       name = "nimble_parsec";
       version = "1.4.0";
@@ -216,58 +138,6 @@ let
       beamDeps = [];
     };
 
-    nimble_pool = buildMix rec {
-      name = "nimble_pool";
-      version = "1.1.0";
-
-      src = fetchHex {
-        pkg = "nimble_pool";
-        version = "${version}";
-        sha256 = "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a";
-      };
-
-      beamDeps = [];
-    };
-
-    pre_commit = buildMix rec {
-      name = "pre_commit";
-      version = "0.3.4";
-
-      src = fetchHex {
-        pkg = "pre_commit";
-        version = "${version}";
-        sha256 = "16f684ba4f1fed1cba6b19e082b0f8d696e6f1c679285fedf442296617ba5f4e";
-      };
-
-      beamDeps = [];
-    };
-
-    req = buildMix rec {
-      name = "req";
-      version = "0.5.6";
-
-      src = fetchHex {
-        pkg = "req";
-        version = "${version}";
-        sha256 = "cfaa8e720945d46654853de39d368f40362c2641c4b2153c886418914b372185";
-      };
-
-      beamDeps = [ finch jason mime ];
-    };
-
-    telemetry = buildRebar3 rec {
-      name = "telemetry";
-      version = "1.3.0";
-
-      src = fetchHex {
-        pkg = "telemetry";
-        version = "${version}";
-        sha256 = "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6";
-      };
-
-      beamDeps = [];
-    };
-
     uuid = buildMix rec {
       name = "uuid";
       version = "1.1.8";