- Merge Breaking changes.

Signed-off-by: syeyoung <cyoung06@naver.com>

14 files changed, 670 insertions, 421 deletions

diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthManager.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthManager.java
new file mode 100644
index 00000000..f0c346c6
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthManager.java
@@ -0,0 +1,150 @@
+package kr.syeyoung.dungeonsguide.launcher.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.launcher.auth.authprovider.AuthProvider;
+import kr.syeyoung.dungeonsguide.launcher.auth.authprovider.DgAuth.DgAuth;
+import kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthUtil.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthUtil.java
new file mode 100644
index 00000000..9ce02643
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/AuthUtil.java
@@ -0,0 +1,70 @@
+package kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/InvalidDungeonsGuideCredentialsException.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/InvalidDungeonsGuideCredentialsException.java
new file mode 100644
index 00000000..ebe78196
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/InvalidDungeonsGuideCredentialsException.java
@@ -0,0 +1,8 @@
+package kr.syeyoung.dungeonsguide.launcher.auth;
+
+public class InvalidDungeonsGuideCredentialsException extends Throwable {
+
+    public InvalidDungeonsGuideCredentialsException(String message) {
+        super(message);
+    }
+}
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/ResourceManager.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/ResourceManager.java
new file mode 100644
index 00000000..721b629f
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/ResourceManager.java
@@ -0,0 +1,164 @@
+package kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/AuthProvider.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/AuthProvider.java
new file mode 100644
index 00000000..d469c729
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/AuthProvider.java
@@ -0,0 +1,16 @@
+package kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuth.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuth.java
new file mode 100644
index 00000000..dca9ce33
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuth.java
@@ -0,0 +1,46 @@
+package kr.syeyoung.dungeonsguide.launcher.auth.authprovider.DgAuth;
+
+import com.mojang.authlib.exceptions.AuthenticationException;
+import kr.syeyoung.dungeonsguide.launcher.auth.AuthUtil;
+import kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuthUtil.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuthUtil.java
new file mode 100644
index 00000000..53b57e1a
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/DgAuth/DgAuthUtil.java
@@ -0,0 +1,88 @@
+package kr.syeyoung.dungeonsguide.launcher.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/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/NullAuth.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/NullAuth.java
new file mode 100644
index 00000000..303cfb0a
--- /dev/null
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/auth/authprovider/NullAuth.java
@@ -0,0 +1,62 @@
+package kr.syeyoung.dungeonsguide.launcher.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();
+    }
+
+}
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/branch/ModDownloader.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/branch/ModDownloader.java
deleted file mode 100644
index 45eacee5..00000000
--- a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/branch/ModDownloader.java
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
- * Copyright (C) 2021  cyoung06
- *
- * 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/>.
- */
-
-package kr.syeyoung.dungeonsguide.launcher.branch;
-
-import com.google.gson.JsonElement;
-import com.google.gson.JsonParser;
-import kr.syeyoung.dungeonsguide.launcher.authentication.Authenticator;
-import lombok.Getter;
-import net.minecraftforge.fml.common.ProgressManager;
-import org.apache.commons.codec.binary.Base64;
-import org.apache.commons.io.IOUtils;
-import org.json.JSONArray;
-import org.json.JSONObject;
-
-import javax.crypto.*;
-import javax.crypto.spec.IvParameterSpec;
-import javax.crypto.spec.SecretKeySpec;
-import javax.net.ssl.HttpsURLConnection;
-import java.io.*;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.security.*;
-import java.security.cert.CertificateException;
-import java.security.spec.InvalidKeySpecException;
-import java.security.spec.X509EncodedKeySpec;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.UUID;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipInputStream;
-
-public class ModDownloader {
-    private Authenticator authenticator;
-
-    @Getter
-    private List<UpdateBranch> accessibleBranches = null;
-
-    public ModDownloader(Authenticator authenticator) {
-        this.authenticator = authenticator;
-    }
-
-    public List<UpdateBranch> fetchAccessibleBranches() throws IOException {
-        HttpURLConnection urlConnection = authenticator.request("GET", "/updates/");
-        try (InputStream is = authenticator.obtainInputStream(urlConnection)) {
-            String payload = String.join("\n", IOUtils.readLines(is));
-
-            JSONArray jsonArray = new JSONArray(payload);
-            List<UpdateBranch> branches = new ArrayList<>();
-            for (Object o : jsonArray) {
-                if (o instanceof JSONObject) {
-                    JSONObject branch = (JSONObject) o;
-                    UpdateBranch updateBranch = new UpdateBranch();
-                    updateBranch.setId(branch.getLong("id"));
-                    updateBranch.setName(branch.getString("name"));
-                    updateBranch.setMetadata(branch.getJSONObject("metadata").getJSONObject("metadataSchema"));
-                    branches.add(updateBranch);
-                }
-            }
-            return this.accessibleBranches = branches;
-        }
-    }
-
-    public List<Update> fetchUpdates(Long branch, int page) throws IOException {
-        HttpURLConnection urlConnection = authenticator.request("GET", "/updates/"+branch+"/");
-        try (InputStream is = authenticator.obtainInputStream(urlConnection)) {
-            String payload = String.join("\n", IOUtils.readLines(is));
-
-            JSONArray jsonArray = new JSONArray(payload);
-            List<Update> updates = new ArrayList<>();
-            for (Object o : jsonArray) {
-                if (o instanceof JSONObject) {
-                    JSONObject json = (JSONObject) o;
-                    Update update = new Update();
-                    update.setId(json.getLong("id"));
-                    update.setBranchId(json.getLong("branchId"));
-                    update.setName(json.getString("versionName"));
-                    update.setUpdateLog(json.getString("updateLog"));
-                    update.setMetadata(json.getJSONObject("metadata"));
-                    for (Object assets : json.getJSONObject("assets").getJSONArray("assets")) {
-                        if (assets instanceof JSONObject) {
-                            JSONObject a_json = (JSONObject) assets;
-                            Update.Asset asset = new Update.Asset();
-                            asset.setName(a_json.getString("name"));
-                            asset.setSize(a_json.getLong("size"));
-                            asset.setObjectId(a_json.getString("objectId"));
-                            asset.setAssetId(UUID.fromString(a_json.getString("assetID")));
-                            update.getAssets().add(asset);
-                        }
-                    }
-                    updates.add(update);
-                }
-            }
-            return updates;
-        }
-    }
-
-    /*
-        pls Close after done
-     */
-    public InputStream fetchAsset(Update update, UUID assetId) throws IOException {
-        HttpURLConnection urlConnection = authenticator.request("GET", "/updates/"+update.getBranchId()+"/"+update.getId()+"/"+assetId.toString());
-        try (InputStream is = authenticator.obtainInputStream(urlConnection)) {
-            String payload = String.join("\n", IOUtils.readLines(is));
-            JSONObject object = new JSONObject(payload);
-
-            HttpURLConnection connection = (HttpURLConnection) new URL(object.getString("url")).openConnection();
-            connection.setRequestMethod(object.getString("method"));
-            urlConnection.setRequestProperty("User-Agent", "DungeonsGuide/1.0");
-            urlConnection.setDoInput(true);
-            urlConnection.setDoOutput(true);
-            urlConnection.setAllowUserInteraction(true);
-            return authenticator.obtainInputStream(connection);
-        }
-    }
-
-
-
-
-
-
-    private ProgressManager.ProgressBar progressBar;
-
-    private PublicKey dgPublicKey;
-    private PublicKey getDGPublicKey() throws NoSuchAlgorithmException, InvalidKeySpecException {
-        if (dgPublicKey != null) return dgPublicKey;
-        X509EncodedKeySpec spec = new X509EncodedKeySpec(Base64.decodeBase64("MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxO89qtwG67jNucQ9Y44c" +
-                "IUs/B+5BeJPs7G+RG2gfs4/2+tzF/c1FLDc33M7yKw8aKk99vsBUY9Oo8gxxiEPB" +
-                "JitP/qfon2THp94oM77ZTpHlmFoqbZMcKGZVI8yfvEL4laTM8Hw+qh5poQwtpEbK" +
-                "Xo47AkxygxJasUnykER2+aSTZ6kWU2D4xiNtFA6lzqN+/oA+NaYfPS0amAvyVlHR" +
-                "n/8IuGkxb5RrlqVssQstFnxsJuv88qdGSEqlcKq2tLeg9hb8eCnl2OFzvXmgbVER" +
-                "0JaV+4Z02fVG1IlR3Xo1mSit7yIU6++3usRCjx2yfXpnGGJUW5pe6YETjNew3ax+" +
-                "FAZ4GePWCdmS7FvBnbbABKo5pE06ZTfDUTCjQlAJQiUgoF6ntMJvQAXPu48Vr8q/" +
-                "mTcuZWVnI6CDgyE7nNq3WNoq3397sBzxRohMxuqzl3T19zkfPKF05iV2Ju1HQMW5" +
-                "I119bYrmVD240aGESZc20Sx/9g1BFpNzQbM5PGUlWJ0dhLjl2ge4ip2hHciY3OEY" +
-                "p2Qy2k+xEdenpKdL+WMRimCQoO9gWe2Tp4NmP5dppDXZgPjXqjZpnGs0Uxs+fXqW" +
-                "cwlg3MbX3rFl9so/fhVf4p9oXZK3ve7z5D6XSSDRYECvsKIa08WAxJ/U6n204E/4" +
-                "xUF+3ZgFPdzZGn2PU7SsnOsCAwEAAQ=="));
-        return dgPublicKey = KeyFactory.getInstance("RSA").generatePublic(spec);
-    }
-
-
-
-
-    private KeyPair rsaKey;
-    private KeyPair getKeyPair()  {
-        KeyPairGenerator a = null;
-        try {
-            a = KeyPairGenerator.getInstance("RSA");
-        } catch (NoSuchAlgorithmException b) { }
-        a.initialize(1024);
-        this.rsaKey = a.generateKeyPair();
-        return this.rsaKey;
-    }
-
-
-    private final HashMap<String, byte[]> loadedResources = new HashMap<String, byte[]>();
-
-    public HashMap<String, byte[]> getResources() {
-        return loadedResources;
-    }
-
-    private void downloadSafe(String dgToken, String url, boolean isValidateSignature) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException, CertificateException, KeyStoreException, KeyManagementException, 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", dgToken);
-        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, this.rsaKey.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 = null;
-        if (isValidateSignature) {
-            progressBar.step("Validating Signature");
-            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(getDGPublicKey());
-            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 = 0;
-            while((p = zipInputStream.read(buffer)) > 0) {
-                byteArrayOutputStream.write(buffer, 0, p);
-            }
-            this.loadedResources.put(zipEntry.getName(), byteArrayOutputStream.toByteArray());
-        }
-        dgConnection.disconnect();
-    }
-
-    public JsonElement getJsonSecured(String u) throws IOException, NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidAlgorithmParameterException, CertificateException, KeyStoreException, KeyManagementException {
-        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", authenticator.getUnexpiredToken());
-        httpsURLConnection.setDoInput(true);
-        httpsURLConnection.setDoOutput(true);
-
-        InputStream inputStream = httpsURLConnection.getInputStream();
-        byte[] lengthPayload = new byte[4];
-        inputStream.read(lengthPayload);
-        int 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, this.rsaKey.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 cipherInputStream = new CipherInputStream(inputStream, cipher);
-        cipherInputStream.read(lengthPayload);
-        length = ((lengthPayload[0] & 0xFF) << 24) |
-                ((lengthPayload[1] & 0xFF) << 16) |
-                ((lengthPayload[2] & 0xFF) << 8) |
-                ((lengthPayload[3] & 0xFF));
-        JsonElement l = new JsonParser().parse(new InputStreamReader(cipherInputStream));
-        httpsURLConnection.disconnect();
-        return l;
-    }
-}
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/gui/GuiLoadingError.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/gui/GuiLoadingError.java
index f7cc5972..f699b1d7 100644
--- a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/gui/GuiLoadingError.java
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/gui/GuiLoadingError.java
@@ -18,64 +18,34 @@
 
 package kr.syeyoung.dungeonsguide.launcher.gui;
 
-import kr.syeyoung.dungeonsguide.launcher.util.QRCodeGenerator;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.*;
-import net.minecraft.client.renderer.GlStateManager;
-import net.minecraft.client.renderer.Tessellator;
-import net.minecraft.client.renderer.WorldRenderer;
-import net.minecraft.client.renderer.texture.DynamicTexture;
-import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
-import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fml.common.FMLCommonHandler;
 import org.lwjgl.opengl.GL11;
 
-import javax.imageio.ImageIO;
-import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.util.Base64;
-import java.util.zip.GZIPOutputStream;
+import java.io.PrintStream;
 
 public class GuiLoadingError extends GuiScreen {
-    private String stacktrace;
-    private Throwable throwable;
+    static Throwable cause;
+    private final String stacktrace;
+    private final GuiScreen originalGUI;
+    public GuiLoadingError(GuiScreen originalGUI) {
 
-    private DynamicTexture texture;
-    private ResourceLocation location;
-    private BufferedImage qrCode;
-    private Runnable clear;
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        PrintStream printStream = new PrintStream(byteArrayOutputStream);
+        cause.printStackTrace(printStream);
+        this.stacktrace = byteArrayOutputStream.toString();
 
-    public GuiLoadingError(Throwable t, Runnable clear) {
-        this.throwable = t;
-        StringWriter sw = new StringWriter();
-        PrintWriter pw = new PrintWriter(sw);
-        t.printStackTrace(pw);
-        stacktrace = sw.toString();
-
-
-        try {
-            qrCode = QRCodeGenerator.generateQRCode(stacktrace.getBytes());
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-        texture = new DynamicTexture(qrCode.getWidth(), qrCode.getHeight());
-        location = Minecraft.getMinecraft().getTextureManager().getDynamicTextureLocation("dg/errorqr", texture);
-
-        qrCode.getRGB(0,0,qrCode.getWidth(), qrCode.getHeight(), texture.getTextureData(), 0, qrCode.getWidth());
-
-        texture.updateDynamicTexture();
-        this.clear = clear;
+        this.originalGUI = originalGUI;
     }
 
     @Override
     public void initGui() {
         ScaledResolution sr = new ScaledResolution(Minecraft.getMinecraft());
-        this.buttonList.add(new GuiButton(0, sr.getScaledWidth()/2-100,sr.getScaledHeight()-40 ,"Close Minecraft"));
-        this.buttonList.add(new GuiButton(1, sr.getScaledWidth()/2-100,sr.getScaledHeight()-70 ,"Play Without DG"));
-        clear.run();
+        this.buttonList.add(new GuiButton(0, sr.getScaledWidth()/2-100,sr.getScaledHeight()-70 ,"Close Minecraft"));
+        this.buttonList.add(new GuiButton(1, sr.getScaledWidth()/2-100,sr.getScaledHeight()-40 ,"Play Without DG"));
     }
 
     @Override
@@ -84,7 +54,7 @@ public class GuiLoadingError extends GuiScreen {
         if (button.id == 0) {
             FMLCommonHandler.instance().exitJava(-1,true);
         } else if (button.id == 1) {
-            Minecraft.getMinecraft().displayGuiScreen(null);
+            Minecraft.getMinecraft().displayGuiScreen(originalGUI);
         }
     }
 
@@ -94,8 +64,8 @@ public class GuiLoadingError extends GuiScreen {
 
         ScaledResolution sr = new ScaledResolution(Minecraft.getMinecraft());
         FontRenderer fontRenderer = Minecraft.getMinecraft().fontRendererObj;
-        fontRenderer.drawString("DungeonsGuide has ran into unknown error while loading itself", (sr.getScaledWidth()-fontRenderer.getStringWidth("DungeonsGuide has ran into unknown error while loading itself"))/2,40,0xFFFF0000);
-        fontRenderer.drawString("Please contact DungeonsGuide support with this screen", (sr.getScaledWidth()-fontRenderer.getStringWidth("Please contact DungeonsGuide support with this screen"))/2, (int) (40+fontRenderer.FONT_HEIGHT*1.5),0xFFFF0000);
+        fontRenderer.drawString("DungeonsGuide has ran into error while loading itself", (sr.getScaledWidth()-fontRenderer.getStringWidth("DungeonsGuide has ran into error while loading itself"))/2,40,0xFFFF0000);
+        fontRenderer.drawString("Please contact DungeonsGuide support with this screen", (sr.getScaledWidth()-fontRenderer.getStringWidth("Please contact developer with this screen"))/2, (int) (40+fontRenderer.FONT_HEIGHT*1.5),0xFFFF0000);
 
         int tenth = sr.getScaledWidth() / 10;
 
@@ -108,27 +78,6 @@ public class GuiLoadingError extends GuiScreen {
         }
         GL11.glDisable(GL11.GL_SCISSOR_TEST);
 
-
-        GlStateManager.pushMatrix();
-        GlStateManager.scale(1.0/sr.getScaleFactor(), 1.0/sr.getScaleFactor(), 1);
-        GlStateManager.translate(0, Minecraft.getMinecraft().displayHeight - qrCode.getHeight() * 3, 0);
-        Tessellator tessellator = Tessellator.getInstance();
-        WorldRenderer worldrenderer = tessellator.getWorldRenderer();
-        float f = 0.0F;
-        Minecraft.getMinecraft().getTextureManager().bindTexture(this.location);
-        GlStateManager.enableBlend();
-        GlStateManager.tryBlendFuncSeparate(1, 771, 0, 1);
-        GlStateManager.disableAlpha();
-        worldrenderer.begin(7, DefaultVertexFormats.POSITION_TEX);
-        worldrenderer.pos(0, qrCode.getHeight()*3, 0).tex(0.0D, 1.0D).endVertex();
-        worldrenderer.pos(qrCode.getWidth()*3, qrCode.getHeight()*3, 0).tex(1.0D, 1.0D).endVertex();
-        worldrenderer.pos(qrCode.getWidth()*3, 0, 0).tex(1.0D, 0.0D).endVertex();
-        worldrenderer.pos(0, 0, 0).tex(0.0D, 0.0D).endVertex();
-        tessellator.draw();
-        GlStateManager.enableAlpha();
-        GlStateManager.disableBlend();
-        GlStateManager.popMatrix();
-
         super.drawScreen(mouseX, mouseY, partialTicks);
     }
 
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGConnection.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGConnection.java
index 649dfdc5..5a310738 100755
--- a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGConnection.java
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGConnection.java
@@ -1,35 +1,37 @@
 /*
- * Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
- * Copyright (C) 2021  cyoung06
+ *     Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
+ *     Copyright (C) 2021  cyoung06
  *
- * 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 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.
+ *     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/>.
+ *     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/>.
  */
 
 package kr.syeyoung.dungeonsguide.launcher.url;
 
-import kr.syeyoung.dungeonsguide.launcher.authentication.Authenticator;
+import kr.syeyoung.dungeonsguide.launcher.auth.ResourceManager;
 
-import java.io.*;
+import java.io.ByteArrayInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
 import java.net.URL;
 import java.net.URLConnection;
 
 public class DGConnection extends URLConnection {
-    private final Authenticator authenticator;
-    protected DGConnection(URL url, Authenticator a) {
+
+    protected DGConnection(URL url) {
         super(url);
         connected = false;
-        this.authenticator = a;
     }
 
     @Override
@@ -37,10 +39,10 @@ public class DGConnection extends URLConnection {
     }
     @Override
     public InputStream getInputStream() throws IOException {
-            if (authenticator != null) {
+            if (ResourceManager.getInstance().getResources() != null) {
                 String path = url.getPath().substring(1);
-//                if (!authenticator.getResources().containsKey(path)) throw new FileNotFoundException();
-//                return new ByteArrayInputStream(authenticator.getResources().get(path));
+                if (!ResourceManager.getInstance().getResources().containsKey(path)) throw new FileNotFoundException();
+                return new ByteArrayInputStream(ResourceManager.getInstance().getResources().get(path));
             }
         throw new FileNotFoundException();
     }
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandler.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandler.java
index 82ddff18..456e7f8c 100755
--- a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandler.java
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandler.java
@@ -1,24 +1,23 @@
 /*
- * Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
- * Copyright (C) 2021  cyoung06
+ *     Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
+ *     Copyright (C) 2021  cyoung06
  *
- * 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 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.
+ *     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/>.
+ *     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/>.
  */
 
 package kr.syeyoung.dungeonsguide.launcher.url;
 
-import kr.syeyoung.dungeonsguide.launcher.authentication.Authenticator;
 import lombok.AllArgsConstructor;
 
 import java.io.IOException;
@@ -28,9 +27,8 @@ import java.net.URLStreamHandler;
 
 @AllArgsConstructor
 public class DGStreamHandler extends URLStreamHandler {
-    private final Authenticator auth;
     @Override
     protected URLConnection openConnection(URL url) throws IOException {
-        return new DGConnection(url, this.auth);
+        return new DGConnection(url);
     }
 }
diff --git a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandlerFactory.java b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandlerFactory.java
index a7b50046..a7eefa37 100755
--- a/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandlerFactory.java
+++ b/loader/src/main/java/kr/syeyoung/dungeonsguide/launcher/url/DGStreamHandlerFactory.java
@@ -1,24 +1,23 @@
 /*
- * Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
- * Copyright (C) 2021  cyoung06
+ *     Dungeons Guide - The most intelligent Hypixel Skyblock Dungeons Mod
+ *     Copyright (C) 2021  cyoung06
  *
- * 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 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.
+ *     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/>.
+ *     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/>.
  */
 
 package kr.syeyoung.dungeonsguide.launcher.url;
 
-import kr.syeyoung.dungeonsguide.launcher.authentication.Authenticator;
 import lombok.AllArgsConstructor;
 
 import java.net.URLStreamHandler;
@@ -26,11 +25,10 @@ import java.net.URLStreamHandlerFactory;
 
 @AllArgsConstructor
 public class DGStreamHandlerFactory implements URLStreamHandlerFactory {
-    private final Authenticator auth;
     @Override
     public URLStreamHandler createURLStreamHandler(String protocol) {
         if ("z".equals(protocol)) {
-            return new DGStreamHandler(this.auth);
+            return new DGStreamHandler();
         }
         return null;
     }
diff --git a/loader/src/main/resources/mcmod.info b/loader/src/main/resources/mcmod.info
index 70df65aa..2e1a5e46 100755
--- a/loader/src/main/resources/mcmod.info
+++ b/loader/src/main/resources/mcmod.info
@@ -4,10 +4,10 @@
   "name": "Skyblock Dungeons Guide",
   "description": "A mod to help dungeon players to find and solve secrets and puzzles most efficiently.",
   "version": "${version}",
-  "mcversion": "${mcversion}",
-  "url": "",
+  "mcversion": "1.8.9",
+  "url": "https://discord.gg/dg",
   "updateUrl": "",
-  "authorList": ["syeyoung"],
+  "authorList": ["syeyoung", "kokoniara"],
   "credits": "The guild Jerry's Crew, for nothing.",
   "logoFile": "",
   "screenshots": [],