3rd time is the charm (#70)

* Updated some dependencies, used my crusty skytils forgegradle fork + removed the IRRELEVANT hytils fixes. generally made the thing build

* made the logs less annoying

* temp fix so it doesn't throw an exception

* FAT REFACTOR
 General refactor on
  Authenticator.java
  DungeonsGuide.java
  Main.java
 removed unnecessary imports where not needed

to be removed DGInterface.java (no real reason to exist)
in DungeonsGuide.java made the retry stomp a singe-thread executor, so it doesn't leak when offline
added an "offline mode" so it doesn't just error when server down
TODO: move auth to DungeonsGuide.java and make it retry when network down on launch

* New auth implementation that should replace the old one:
 does all the things the old one did
 removed progressBar cuz it would make the impl 3x more complicated in the name of a splash screen
 added a token changed event (so now it supports re-logging with a different account)
 code is (should) be more readable / extensible

TODO: surgically replace Authenticator.java with new impl AND support re-logging

* Made the chat processor logger name less obnoxious

* implemented my implementation of an implementation of auth
can and is very buggy, essentially the loading of the remote classes but the mod works so idk
TODO: MAKE STOMP NOT DO STUFF TILL STOMPCONNECTED IS EMITTED

* fix for stomp client null bc forge events not going tru on pre-init
TODO: make work and test the web loadable classes, then make all the stuff that relies on stomp not throw exceptions when stomp is not connected

* move the create auth method into AuthProvider interface,
so we don't clutter AuthManager with implementation details

* Decouple AuthProviderUtil and DgAuth,
move some stuff around and make it more readable

* moved AuthUtil to make more sense

* de-clutter the tree a little bit

* Inline StompClientStatus.java / refactor

* inline the useless interface

* refactoringgg

* fix ahUtils exeption spam

* small StompClient refactor

* fix GLCursors exeption spam + logger

* make sure we are authenticated when downloading resources

* new .destination("value") instead of .header("destination", "value")

* StompMessageHandler -> StompMessageSubscription

* Introduced StompManager

* fix dungeon map not showing ppl heads

* ehhh

* wip (commit cuz im chekig out)

* fix player profile not never loading in chat

* remove this specific line

* fix player profile not never loading in chat

* cut out hychat like a cancer

* ApiFetchur now caches whole players not single profiles,
added a switch profile button in gui

* ugh git

* Revert "cut out hychat like a cancer"

This reverts commit 2ee11afa

* ugh git x2

* I tried, good luck maintaining this

* forgot to uncomment hychat fix

* make my new party ready work and look ok

* change the look and add some "somewhere" locations

* make stomp connection "null safe"

* i hate git

* introduce callbacks on parameter change for cleaner code
add one example

* impl new system,
half way done

* now shows which profile is now selected
put button on top
a lil refactor

* fix player profile sometimes not loading

* add players knowing who is using dg (try to)

* announcing that we are a dg user will get reworked in the future

* update deps

* make it not spam logs

* sanity check for premium features so it doesn't 403

* add YoMamaOutdated that checks if you are using outdated dg

* hychat?? anyone

* try catch in FeatureRegistry

* added Ether transmission ability

* chat shredder borken, disabled for now

* party deserves its own folder

* dungeon stuff in dungeon folder

* events folders moved

* fix score data collection hanging forever if stomp is not connected

* fix stomp never connecting

* re-add the removed

* fix wonky rendering

* server side implementation is not ready, canning this for a future release

* attempt to fix heads loading on main thread

* discord

* me when sonar lint

* new consumer based stomp subscriptions

* replace old with new subscriptions

* remove the remains of StompSubscription and replace CloseListener with a forge event

* StompSubscription is now a functional interface

* remove unnecessary event message chains,
feature logic should be in the feature

* fix events being set up wrongly

* Revert "fix events being set up wrongly"

This reverts commit e6ea7efa557a5f5c8a3ea33be998717bc024b8cb.

* Revert "remove unnecessary event message chains,"

This reverts commit 96f508bae85b33cdcef6be19226c00fc52a1439b.

* fix stomp client sending payload object instead of the actual payload

* fix null pointer on empty party

* fix players with cosmetics name being white in tab

* added message when not connected to dg
changed YoMamaOutdated to use CloudFlare workers
added client sided message queue

* the mod doesn't init when outdated

* mcmod.info

* dont busy wait in authmenager

* test pepole crusty tests

* chill out the authmanager

* name the thread pool in auth manager

* clear most compiler warnings

* make outdated check allow to play without the mod initialized

* make first startup VERY noticeable, move config creation to main

* major dungeon package refactor

* refactor checkpoint

* refactor checkpoint #1

* final refactor checkpoint #2

* remove the player if from version check, made the version check not nesssery for playing

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* remove trap room fix that didnt fix anything

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* make secret beacons optional

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* make the checkmarks on map align with the rest of everyone

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* removed debug function

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move the menus to make more sense + make destination text on secrets optional

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* improve dungeonMap performance by ~90%
temporarly disabled 9 slot map player location due to bugs
fix DungeonContext not getting player from ScoreBoard

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* add epic countdown on dungeon start (still wip)

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* added a option to cache blockstaes

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* added TabListUtil

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* fixed epic countdown

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* (i want to sleep) made all the dungeon room detection async
TODO: fix ol the bugs i created by doing that

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* stuff still broken but almost playable, unlike last commit

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* upload build jar to discord

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* cache the deps for the love of god

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* who needs linux and 32bit windows anyway

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* only upload to discord on beta branch

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* added "kick" when a member joins party

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move stuff that sends chat to player into a separate class

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* use our chat queue instead of calling `thePlayer.addChatMessage` to proxy ourselves from 1.8 code

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* Added and implemented MortDetector2000.java

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* extract duplicate + make more readable

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* added dummy support in FeatureDebugTrap

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* gradle now puts version in mcmod.info

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* remove side effects from DgAuth.java

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move debug commands into debug CommandDgDebug.java

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* fix key being wrong

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move epic countdown to dungeon huds, clean up

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* Revert "who needs linux and 32bit windows anyway"

This reverts commit 0f3c2d544a70fc799cd3215dad5e997c0c8b6c06.

* make FeatureRegistry not static initialise to get rid of "ClassNotDefined" errors

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* null check on Exception since it threw NullPointers

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* finish up progress bar in DungeonsGuide.java

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* warn about null features

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move stuff around in SkyblockStatus, move the stuff that updates status into SkyblockStatus from DungeonListener

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* rename DungeonGodObject.java to DungeonFacade.java

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* add cleanChat clause in FeatureEpicCountdown

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* implement getPreRequisites and isComplete in ActionBreakWithSuperBoom

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* clean up FeatureParameter

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* eliminate possible state inconsistency in DungeonListener

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move percentage from DungeonFacade to DungeonContext

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move `purge` and `partymax` back into CommandDungeonsGuide

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* stop repeating ReceiveChatQueue in ChatTransmitter

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* Clean up DungeonsGuide

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move `sendDebugChat` to `ChatTransmitter.java`

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* change CommandDgDebug into a `else if` from an `switch` because some bigot decided its better

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* duplicate code since it currently doesn't make sense, to be reworked

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* fix typo

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* remove the trycatch so we fail fast

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* fix null pointer when trying to get fontRenderer before minecraft is initialised

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* broken checkpoint 0

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* broken checkpoint 1

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* Revert "broken checkpoint 1"

This reverts commit 64985e6287c7b5650b509668e42b9803e25c419c.

* Revert "broken checkpoint 0"

This reverts commit 5f62e1345d9c8e7f66f1e5792004a05027913d92.

* Revert "fix null pointer when trying to get fontRenderer before minecraft is initialised"

This reverts commit 57d92a78d31c410f699b58c8995c94055d57e2a4.

* Revert "remove the trycatch so we fail fast"

This reverts commit 12772255ed575e411fb99edf37ec16d0e5f42924.

* Revert "fix typo"

This reverts commit aa96cc2436d3ead42d53ead78f3334fac5100713.

* Revert "duplicate code since it currently doesn't make sense, to be reworked"

This reverts commit 6d71b88e3102d23bcfd90d85e8996327776fd52f.

* Revert "change CommandDgDebug into a `else if` from an `switch` because some bigot decided its better"

This reverts commit ffea84d9b5fd4adbe034a88249bc920eafa7c53a.

* Revert "move `sendDebugChat` to `ChatTransmitter.java`"

This reverts commit 5b8b2e22fff33768134a01c15c7650100ebb9257.

* Revert "Clean up DungeonsGuide"

This reverts commit 2069ad3ebc4344eb1e778954dc1d8f6c9303de69.

* fix typo

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>
(cherry picked from commit aa96cc2436d3ead42d53ead78f3334fac5100713)

* duplicate code since it currently doesn't make sense, to be reworked

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>
(cherry picked from commit 6d71b88e3102d23bcfd90d85e8996327776fd52f)

* change CommandDgDebug into a `else if` from an `switch` because some bigot decided its better

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>
(cherry picked from commit ffea84d9b5fd4adbe034a88249bc920eafa7c53a)

* move debug chat into ChatTransmitter

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* null pointer in SkyblockStatus bc context was not initialised yet

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move dungeon starting door detection up the tree since it was a duplicate in both children, inline MortDetector2000

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move dungeon name to DungeonContext

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* clean up Main

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* separate the "loader" and "mod"

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* separate DungeonsGuide and Main even more

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* change singleton implementation of DungeonsGuide

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move classes since their paths are hardcoded into roomdatas

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* create CatacombsDataProvider.java and implement it

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* remove unnecessary `DungeonsGuide.getDungeonsGuide();` (IntelliJ refactor bug)

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* move `help` text in commands

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* a certain someone hates switch statements

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* remove my version check, since we have to wait for out lord and savior to make his own

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* make `Main` and `DungeonsGuide` compatible with supported jar classloading

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* make the beta upload action run on push
since it didnt get the secret on pull request and failed anyway,
TODO: make the jar name not hardcoded

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

* upload all jar

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>

Signed-off-by: kingstefan26 <70776766+kingstefan26@users.noreply.github.com>
Co-authored-by: syeyoung <42869671+cyoung06@users.noreply.github.com>

8 files changed, 604 insertions, 0 deletions

diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthManager.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthManager.java
new file mode 100644
index 00000000..5588a4a2
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthManager.java
@@ -0,0 +1,150 @@
+package kr.syeyoung.dungeonsguide.auth;
+
+import com.google.common.base.Throwables;
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import com.google.gson.JsonObject;
+import com.mojang.authlib.exceptions.AuthenticationException;
+import kr.syeyoung.dungeonsguide.auth.authprovider.AuthProvider;
+import kr.syeyoung.dungeonsguide.auth.authprovider.DgAuth.DgAuth;
+import kr.syeyoung.dungeonsguide.auth.authprovider.DgAuth.DgAuthUtil;
+import kr.syeyoung.dungeonsguide.mod.chat.ChatTransmitter;
+import kr.syeyoung.dungeonsguide.mod.events.impl.AuthChangedEvent;
+import kr.syeyoung.dungeonsguide.mod.stomp.StompManager;
+import lombok.Setter;
+import net.minecraft.client.Minecraft;
+import net.minecraftforge.common.MinecraftForge;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.TickEvent;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+import java.util.Objects;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
+
+
+public class AuthManager {
+    Logger logger = LogManager.getLogger("AuthManger");
+
+    private static AuthManager instance;
+
+    public static AuthManager getInstance() {
+        if(instance == null) instance = new AuthManager();
+        return instance;
+    }
+
+
+    @Setter
+    private String baseserverurl = "https://dungeons.guide";
+
+    private AuthProvider currentProvider;
+
+    public String getToken() {
+        if (currentProvider != null && currentProvider.getToken() != null) {
+            return currentProvider.getToken();
+        }
+        return null;
+    }
+
+    public KeyPair getKeyPair(){
+        if (currentProvider != null && currentProvider.getToken() != null) {
+            return currentProvider.getRsaKey();
+        }
+        return null;
+    }
+
+
+    boolean initlock = false;
+
+    public void init() {
+        if (initlock) {
+            logger.info("Cannot init AuthManger twice");
+            return;
+        }
+
+        reauth();
+
+        initlock = true;
+
+
+        MinecraftForge.EVENT_BUS.register(this);
+
+        ThreadFactory namedThreadFactory = new ThreadFactoryBuilder().setNameFormat("DgAuth Pool").build();
+        final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1, namedThreadFactory);
+        scheduler.scheduleAtFixedRate(() -> {
+            if (getToken() != null) {
+                JsonObject obj = DgAuthUtil.getJwtPayload(getToken());
+                if (!obj.get("uuid").getAsString().replace("-", "").equals(Minecraft.getMinecraft().getSession().getPlayerID())) {
+                    shouldReAuth = true;
+                }
+            }
+        }, 10,2000, TimeUnit.MILLISECONDS);
+    }
+
+    boolean shouldReAuth = true;
+    int tickCounter;
+
+    @SubscribeEvent
+    public void onTickClientTick(TickEvent.ClientTickEvent event) {
+        if (event.phase != TickEvent.Phase.START) return;
+
+        if (tickCounter % 200 == 0) {
+            tickCounter = 0;
+            reauth();
+        }
+        tickCounter++;
+
+    }
+
+    public boolean isPlebUser(){
+        return Objects.equals(getInstance().getPlanType(), "OPENSOURCE");
+    }
+
+    public String getPlanType(){
+        if(getToken() == null) return null;
+
+
+       JsonObject jwt = DgAuthUtil.getJwtPayload(getToken());
+
+       if(!jwt.has("plan")) return null;
+
+       return jwt.get("plan").getAsString();
+
+    }
+
+    void reauth() {
+        if (!shouldReAuth) return;
+
+        shouldReAuth = false;
+
+        currentProvider = null;
+        try {
+            currentProvider = new DgAuth(baseserverurl).createAuthProvider();
+            if (currentProvider.getToken() == null) {
+                shouldReAuth = true;
+                currentProvider = null;
+                ChatTransmitter.addToQueue("§eDungeons Guide §7:: §r§cDG auth failed, trying again in ten seconds", true);
+                logger.info("DG auth failed, trying again in a second");
+            } else {
+                // RE-AUTHed SUCCESSFULLY HOORAY
+                // for some reason the forge events don't work in pre init, so I call the callback directly
+                StompManager.getInstance().init();
+                MinecraftForge.EVENT_BUS.post(new AuthChangedEvent());
+            }
+        } catch (NoSuchAlgorithmException | AuthenticationException | IOException e) {
+
+            shouldReAuth = true;
+            currentProvider = null;
+            ChatTransmitter.addToQueue("§eDungeons Guide §7:: §r§cDG auth failed, trying again in ten seconds", true);
+            logger.error("Re-auth failed with message {}, trying again in a ten seconds", String.valueOf(Throwables.getRootCause(e)));
+        }
+
+    }
+
+
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthUtil.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthUtil.java
new file mode 100644
index 00000000..d96b054d
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/AuthUtil.java
@@ -0,0 +1,70 @@
+package kr.syeyoung.dungeonsguide.auth;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonParser;
+
+import javax.crypto.*;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import javax.net.ssl.HttpsURLConnection;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.security.*;
+
+public class AuthUtil {
+    private AuthUtil() {}
+
+    public static KeyPair getKeyPair() throws NoSuchAlgorithmException {
+        KeyPairGenerator a = null;
+        a = KeyPairGenerator.getInstance("RSA");
+        a.initialize(1024);
+        return a.generateKeyPair();
+    }
+
+
+    public static JsonElement getJsonSecured(String u) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException{
+
+        int length = 0;
+        CipherInputStream cipherInputStream = null;
+
+        HttpsURLConnection httpsURLConnection = (HttpsURLConnection) new URL(u).openConnection();
+        httpsURLConnection.setRequestProperty("User-Agent", "DungeonsGuide/1.0");
+        httpsURLConnection.setRequestProperty("Content-Type", "application/json");
+        httpsURLConnection.setRequestMethod("GET");
+        httpsURLConnection.setRequestProperty("Authorization", AuthManager.getInstance().getToken());
+        httpsURLConnection.setDoInput(true);
+        httpsURLConnection.setDoOutput(true);
+
+        InputStream inputStream = httpsURLConnection.getInputStream();
+        byte[] lengthPayload = new byte[4];
+        inputStream.read(lengthPayload);
+        length = ((lengthPayload[0] & 0xFF) << 24) |
+                ((lengthPayload[1] & 0xFF) << 16) |
+                ((lengthPayload[2] & 0xFF) << 8) |
+                ((lengthPayload[3] & 0xFF));
+        while (inputStream.available() < length) ;
+        byte[] keyPayload = new byte[length];
+        inputStream.read(keyPayload);
+
+        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
+        cipher.init(Cipher.DECRYPT_MODE, AuthManager.getInstance().getKeyPair().getPrivate());
+        byte[] AESKey = cipher.doFinal(keyPayload);
+
+        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+        SecretKeySpec secretKeySpec = new SecretKeySpec(AESKey, "AES");
+        IvParameterSpec ivParameterSpec = new IvParameterSpec(AESKey);
+        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);
+        cipherInputStream = new CipherInputStream(inputStream, cipher);
+        cipherInputStream.read(lengthPayload);
+        length = ((lengthPayload[0] & 0xFF) << 24) |
+                ((lengthPayload[1] & 0xFF) << 16) |
+                ((lengthPayload[2] & 0xFF) << 8) |
+                ((lengthPayload[3] & 0xFF));
+
+        httpsURLConnection.disconnect();
+
+        return new JsonParser().parse(new InputStreamReader(cipherInputStream));
+    }
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/InvalidDungeonsGuideCredentialsException.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/InvalidDungeonsGuideCredentialsException.java
new file mode 100644
index 00000000..98caa049
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/InvalidDungeonsGuideCredentialsException.java
@@ -0,0 +1,8 @@
+package kr.syeyoung.dungeonsguide.auth;
+
+public class InvalidDungeonsGuideCredentialsException extends Throwable {
+
+    public InvalidDungeonsGuideCredentialsException(String message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/ResourceManager.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/ResourceManager.java
new file mode 100644
index 00000000..56d46aea
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/ResourceManager.java
@@ -0,0 +1,164 @@
+package kr.syeyoung.dungeonsguide.auth;
+
+import lombok.Setter;
+import net.minecraftforge.common.MinecraftForge;
+import org.apache.commons.codec.binary.Base64;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import javax.crypto.*;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+import javax.net.ssl.HttpsURLConnection;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.security.*;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.X509EncodedKeySpec;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+public class ResourceManager {
+
+    Logger logger = LogManager.getLogger("ResourceManager");
+
+    @Setter
+    private String baseUrl;
+    @Setter
+    private String BASE64_X509ENCODEDKEYSPEC;
+    private final HashMap<String, byte[]> loadedResources = new HashMap<>();
+
+
+    private static ResourceManager instance;
+    public static ResourceManager getInstance() {
+        if(instance == null) {
+            instance = new ResourceManager();
+            MinecraftForge.EVENT_BUS.register(instance);
+        }
+        return instance;
+    }
+
+    private ResourceManager() {
+    }
+
+    public Map<String, byte[]> getResources() {
+        return loadedResources;
+    }
+
+
+    public void downloadAssets(String version) throws InvalidDungeonsGuideCredentialsException {
+        if(AuthManager.getInstance().getToken() == null) throw new InvalidDungeonsGuideCredentialsException("Not Authenticated while downloading assets");
+        try {
+            // version not being null indicates that the user is "premium"
+            // so we download the special version
+            if (version != null)
+                downloadSafe( baseUrl + "/resource/version?v=" + version, true);
+
+            if(!AuthManager.getInstance().isPlebUser()){
+                downloadSafe(baseUrl + "/resource/roomdata", false);
+            } else {
+                logger.error("The current User is a pleb not downloading user data");
+            }
+
+        } catch (Exception t) {
+            t.printStackTrace();
+        }
+
+    }
+
+    private void downloadSafe(String url, boolean isValidateSignature) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException, SignatureException, InvalidKeySpecException {
+        HttpsURLConnection dgConnection = (HttpsURLConnection) new URL(url).openConnection();
+        dgConnection.setRequestProperty("User-Agent", "DungeonsGuide/1.0");
+        dgConnection.setRequestProperty("Content-Type", "application/json");
+        dgConnection.setRequestMethod("GET");
+        dgConnection.setRequestProperty("Authorization", AuthManager.getInstance().getToken());
+        dgConnection.setDoInput(true);
+        dgConnection.setDoOutput(true);
+
+        InputStream inputStream = dgConnection.getInputStream();
+        byte[] lengthBytes = new byte[4];
+        inputStream.read(lengthBytes);
+        int length = ((lengthBytes[0] & 0xFF) << 24) |
+                ((lengthBytes[1] & 0xFF) << 16) |
+                ((lengthBytes[2] & 0xFF) << 8) |
+                ((lengthBytes[3] & 0xFF));
+        while (inputStream.available() < length) ;
+        byte[] keyPayload = new byte[length];
+        inputStream.read(keyPayload);
+
+        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
+        cipher.init(Cipher.DECRYPT_MODE, AuthManager.getInstance().getKeyPair().getPrivate());
+        byte[] h = cipher.doFinal(keyPayload);
+
+        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+        SecretKeySpec keySpec = new SecretKeySpec(h, "AES");
+        IvParameterSpec ivSpec = new IvParameterSpec(h);
+        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
+        CipherInputStream cipherInputStream = new CipherInputStream(inputStream, cipher);
+
+        cipherInputStream.read(lengthBytes);
+        length = ((lengthBytes[0] & 0xFF) << 24) |
+                ((lengthBytes[1] & 0xFF) << 16) |
+                ((lengthBytes[2] & 0xFF) << 8) |
+                ((lengthBytes[3] & 0xFF));
+
+        int totalLen = length;
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        byte[] buff = new byte[256];
+        while (totalLen > 0) {
+            int len = cipherInputStream.read(buff, 0, Math.min(buff.length,  totalLen));
+            totalLen -= len;
+            bos.write(buff, 0, len);
+        }
+        byte[] body = bos.toByteArray();
+
+        byte[] signed;
+        if (isValidateSignature) {
+            cipherInputStream.read(lengthBytes,0 , 4);
+            length = ((lengthBytes[0] & 0xFF) << 24) |
+                    ((lengthBytes[1] & 0xFF) << 16) |
+                    ((lengthBytes[2] & 0xFF) << 8) |
+                    ((lengthBytes[3] & 0xFF));
+
+            totalLen = length;
+            bos = new ByteArrayOutputStream();
+            while (totalLen > 0) {
+                int len = cipherInputStream.read(buff, 0, Math.min(buff.length,  totalLen));
+                totalLen -= len;
+                bos.write(buff, 0, len);
+            }
+            signed = bos.toByteArray();
+
+            Signature sign = Signature.getInstance("SHA512withRSA");
+            sign.initVerify(getPublicKey(BASE64_X509ENCODEDKEYSPEC));
+            sign.update(body);
+            boolean truth = sign.verify(signed);
+            if (!truth) throw new SignatureException("DG SIGNATURE FORGED");
+        }
+
+        ZipInputStream zipInputStream = new ZipInputStream(new ByteArrayInputStream(body));
+        ZipEntry zipEntry;
+        while ((zipEntry=zipInputStream.getNextEntry()) != null) {
+            byte[] buffer = new byte[256];
+            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+            int p;
+            while((p = zipInputStream.read(buffer)) > 0) {
+                byteArrayOutputStream.write(buffer, 0, p);
+            }
+            this.loadedResources.put(zipEntry.getName(), byteArrayOutputStream.toByteArray());
+        }
+    }
+
+
+    public static PublicKey getPublicKey(String base64X509EncodedKeySpec) throws NoSuchAlgorithmException, InvalidKeySpecException {
+        X509EncodedKeySpec spec = new X509EncodedKeySpec(Base64.decodeBase64(base64X509EncodedKeySpec));
+
+        return KeyFactory.getInstance("RSA").generatePublic(spec);
+    }
+
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/AuthProvider.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/AuthProvider.java
new file mode 100644
index 00000000..ba42574e
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/AuthProvider.java
@@ -0,0 +1,16 @@
+package kr.syeyoung.dungeonsguide.auth.authprovider;
+
+import com.mojang.authlib.exceptions.AuthenticationException;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+
+public interface AuthProvider {
+    String getToken();
+
+    KeyPair getRsaKey();
+
+
+    AuthProvider createAuthProvider() throws NoSuchAlgorithmException, AuthenticationException, IOException;
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuth.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuth.java
new file mode 100644
index 00000000..0e7a05f6
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuth.java
@@ -0,0 +1,46 @@
+package kr.syeyoung.dungeonsguide.auth.authprovider.DgAuth;
+
+import com.mojang.authlib.exceptions.AuthenticationException;
+import kr.syeyoung.dungeonsguide.auth.AuthUtil;
+import kr.syeyoung.dungeonsguide.auth.authprovider.AuthProvider;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+
+public class DgAuth implements AuthProvider {
+
+    private final String authServerUrl;
+
+    public DgAuth(String authServerUrl){
+        this.authServerUrl = authServerUrl;
+    }
+
+    private String token;
+    private KeyPair rsaKey;
+
+    @Override
+    public String getToken() {
+        return token;
+    }
+
+    @Override
+    public KeyPair getRsaKey() {
+        return rsaKey;
+    }
+
+
+    @Override
+    public AuthProvider createAuthProvider() throws NoSuchAlgorithmException, AuthenticationException, IOException {
+        this.rsaKey = AuthUtil.getKeyPair();
+
+        String tempToken = DgAuthUtil.requestAuth(this.authServerUrl);
+
+        DgAuthUtil.checkSessionAuthenticity(tempToken);
+
+        this.token = DgAuthUtil.verifyAuth(tempToken, rsaKey.getPublic(), authServerUrl);
+
+        return this;
+    }
+
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuthUtil.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuthUtil.java
new file mode 100644
index 00000000..b01fba50
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/DgAuth/DgAuthUtil.java
@@ -0,0 +1,88 @@
+package kr.syeyoung.dungeonsguide.auth.authprovider.DgAuth;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import com.mojang.authlib.GameProfile;
+import com.mojang.authlib.exceptions.AuthenticationException;
+import com.mojang.authlib.minecraft.MinecraftSessionService;
+import net.minecraft.client.Minecraft;
+import net.minecraft.util.Session;
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.io.IOUtils;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.IOException;
+import java.math.BigInteger;
+import java.net.URL;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
+
+public class DgAuthUtil {
+    private DgAuthUtil(){}
+
+    public static String requestAuth(String baseurl) throws IOException {
+        GameProfile profile = Minecraft.getMinecraft().getSession().getProfile();
+
+        HttpsURLConnection connection = (HttpsURLConnection) new URL(baseurl + "/auth/requestAuth").openConnection();
+        connection.setRequestProperty("User-Agent", "DungeonsGuide/1.0");
+        connection.setRequestProperty("Content-Type", "application/json");
+        connection.setRequestMethod("POST");
+        connection.setDoInput(true);
+        connection.setDoOutput(true);
+
+        connection.getOutputStream().write(("{\"uuid\":\""+profile.getId().toString()+"\",\"nickname\":\""+profile.getName()+"\"}").getBytes());
+        String payload = String.join("\n", IOUtils.readLines(connection.getErrorStream() == null ? connection.getInputStream() : connection.getErrorStream()));
+
+        JsonObject json = (JsonObject) new JsonParser().parse(payload);
+
+        if (!"ok".equals(json.get("status").getAsString())) {
+            return null;
+        }
+        return json.get("data").getAsString();
+    }
+
+    public static void checkSessionAuthenticity(String tempToken) throws NoSuchAlgorithmException, AuthenticationException {
+        JsonObject d = getJwtPayload(tempToken);
+        byte[] sharedSecret = Base64.decodeBase64(d.get("sharedSecret").getAsString());
+        byte[] publicKey =Base64.decodeBase64(d.get("publicKey").getAsString());
+        String hash = calculateServerHash(sharedSecret, publicKey);
+
+        Session session = Minecraft.getMinecraft().getSession();
+        MinecraftSessionService yggdrasilMinecraftSessionService = Minecraft.getMinecraft().getSessionService();
+        yggdrasilMinecraftSessionService.joinServer(session.getProfile(), session.getToken(), hash);
+    }
+
+    public static String verifyAuth(String tempToken, PublicKey clientKey, String baseurl) throws IOException {
+        HttpsURLConnection urlConnection = (HttpsURLConnection) new URL(baseurl + "/auth/authenticate").openConnection();
+        urlConnection.setRequestMethod("POST");
+        urlConnection.setRequestProperty("User-Agent", "DungeonsGuide/1.0");
+        urlConnection.setRequestProperty("Content-Type", "application/json");
+        urlConnection.setDoInput(true);
+        urlConnection.setDoOutput(true);
+
+        urlConnection.getOutputStream().write(("{\"jwt\":\""+tempToken+"\",\"publicKey\":\""+Base64.encodeBase64URLSafeString(clientKey.getEncoded())+"\"}").getBytes());
+        String payload = String.join("\n", IOUtils.readLines(urlConnection.getErrorStream() == null ? urlConnection.getInputStream() : urlConnection.getErrorStream()));
+
+        JsonObject jsonObject = (JsonObject) new JsonParser().parse(payload);
+        if (!"ok".equals(jsonObject.get("status").getAsString())) {
+            return null;
+        }
+        return jsonObject.get("data").getAsString();
+    }
+
+    public static JsonObject getJwtPayload(String jwt) {
+        String midPart = jwt.split("\\.")[1].replace("+", "-").replace("/", "_");
+        String base64Decode = new String(Base64.decodeBase64(midPart)); // padding
+        return (JsonObject) new JsonParser().parse(base64Decode);
+    }
+
+    public static String calculateServerHash(byte[] a, byte[] b) throws NoSuchAlgorithmException {
+        MessageDigest c = MessageDigest.getInstance("SHA-1");
+        c.update("".getBytes());
+        c.update(a);
+        c.update(b);
+        byte[] d = c.digest();
+        return new BigInteger(d).toString(16);
+    }
+}
diff --git a/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/NullAuth.java b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/NullAuth.java
new file mode 100644
index 00000000..ec7e9aed
--- /dev/null
+++ b/src/main/java/kr/syeyoung/dungeonsguide/auth/authprovider/NullAuth.java
@@ -0,0 +1,62 @@
+package kr.syeyoung.dungeonsguide.auth.authprovider;
+
+import com.mojang.authlib.exceptions.AuthenticationException;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.IOException;
+import java.security.KeyPair;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+
+public class NullAuth implements AuthProvider {
+
+    Logger logger = LogManager.getLogger("NullAuth");
+
+    @Override
+    public String getToken() {
+        return "TOKEN";
+    }
+
+    @Override
+    public KeyPair getRsaKey() {
+        return new KeyPair(new PublicKey() {
+            @Override
+            public String getAlgorithm() {
+                return null;
+            }
+
+            @Override
+            public String getFormat() {
+                return null;
+            }
+
+            @Override
+            public byte[] getEncoded() {
+                return new byte[0];
+            }
+        }, new PrivateKey() {
+            @Override
+            public String getAlgorithm() {
+                return null;
+            }
+
+            @Override
+            public String getFormat() {
+                return null;
+            }
+
+            @Override
+            public byte[] getEncoded() {
+                return new byte[0];
+            }
+        });
+    }
+
+    @Override
+    public AuthProvider createAuthProvider() throws NoSuchAlgorithmException, AuthenticationException, IOException {
+        return new NullAuth();
+    }
+
+}