Add Dispatch Password authentication

src/main/java/emu/grasscutter/auth/DefaultAuthentication.java

@@ -6,6 +6,7 @@ import emu.grasscutter.game.Account;
 import emu.grasscutter.server.http.objects.ComboTokenResJson;
 import emu.grasscutter.server.http.objects.LoginResultJson;
 
+import static emu.grasscutter.Configuration.ACCOUNT;
 import static emu.grasscutter.utils.Language.translate;
 
 /**
@@ -13,11 +14,19 @@ import static emu.grasscutter.utils.Language.translate;
  * Allows all users to access any account.
  */
 public final class DefaultAuthentication implements AuthenticationSystem {
-    private final Authenticator<LoginResultJson> passwordAuthenticator = new PasswordAuthenticator();
-    private final Authenticator<LoginResultJson> tokenAuthenticator = new TokenAuthenticator();
-    private final Authenticator<ComboTokenResJson> sessionKeyAuthenticator = new SessionKeyAuthenticator();
-    private final ExternalAuthenticator externalAuthenticator = new ExternalAuthentication();
-    private final OAuthAuthenticator oAuthAuthenticator = new OAuthAuthentication();
+    private Authenticator<LoginResultJson> passwordAuthenticator;
+    private Authenticator<LoginResultJson> tokenAuthenticator = new TokenAuthenticator();
+    private Authenticator<ComboTokenResJson> sessionKeyAuthenticator = new SessionKeyAuthenticator();
+    private ExternalAuthenticator externalAuthenticator = new ExternalAuthentication();
+    private OAuthAuthenticator oAuthAuthenticator = new OAuthAuthentication();
+
+    public DefaultAuthentication() {
+        if(ACCOUNT.EXPERIMENTAL_RealPassword) {
+            passwordAuthenticator = new ExperimentalPasswordAuthenticator();
+        } else {
+            passwordAuthenticator = new PasswordAuthenticator();
+        }
+    }
 
     @Override
     public void createAccount(String username, String password) {

src/main/java/emu/grasscutter/auth/DefaultAuthenticators.java

 package emu.grasscutter.auth;
 
+import at.favre.lib.crypto.bcrypt.BCrypt;
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.auth.AuthenticationSystem.AuthenticationRequest;
 import emu.grasscutter.database.DatabaseHelper;
 import emu.grasscutter.game.Account;
 import emu.grasscutter.server.http.objects.*;
+import emu.grasscutter.utils.FileUtils;
+import emu.grasscutter.utils.Utils;
+
+import javax.crypto.Cipher;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyFactory;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.spec.PKCS8EncodedKeySpec;
 
 import static emu.grasscutter.Configuration.*;
 import static emu.grasscutter.utils.Language.translate;
@@ -18,7 +27,8 @@ public final class DefaultAuthenticators {
      * Handles the authentication request from the username and password form.
      */
     public static class PasswordAuthenticator implements Authenticator<LoginResultJson> {
-        @Override public LoginResultJson authenticate(AuthenticationRequest request) {
+        @Override
+        public LoginResultJson authenticate(AuthenticationRequest request) {
             var response = new LoginResultJson();
 
             var requestData = request.getPasswordRequest();
@@ -34,12 +44,12 @@ public final class DefaultAuthenticators {
             Account account = DatabaseHelper.getAccountByName(requestData.account);
             if (ACCOUNT.maxPlayer <= -1 || playerCount < ACCOUNT.maxPlayer) {
                 // Check if account exists.
-                if(account == null && ACCOUNT.autoCreate) {
+                if (account == null && ACCOUNT.autoCreate) {
                     // This account has been created AUTOMATICALLY. There will be no permissions added.
                     account = DatabaseHelper.createAccountWithUid(requestData.account, 0);
 
                     // Check if the account was created successfully.
-                    if(account == null) {
+                    if (account == null) {
                         responseMessage = translate("messages.dispatch.account.username_create_error");
                         Grasscutter.getLogger().info(translate("messages.dispatch.account.account_login_create_error", address));
                     } else {
@@ -49,7 +59,7 @@ public final class DefaultAuthenticators {
                         // Log the creation.
                         Grasscutter.getLogger().info(translate("messages.dispatch.account.account_login_create_success", address, response.data.account.uid));
                     }
-                } else if(account != null)
+                } else if (account != null)
                     successfulLogin = true;
                 else
                     loggerMessage = translate("messages.dispatch.account.account_login_exist_error", address);
@@ -61,7 +71,118 @@ public final class DefaultAuthenticators {
 
 
             // Set response data.
-            if(successfulLogin) {
+            if (successfulLogin) {
+                response.message = "OK";
+                response.data.account.uid = account.getId();
+                response.data.account.token = account.generateSessionKey();
+                response.data.account.email = account.getEmail();
+
+                loggerMessage = translate("messages.dispatch.account.login_success", address, account.getId());
+            } else {
+                response.retcode = -201;
+                response.message = responseMessage;
+
+            }
+            Grasscutter.getLogger().info(loggerMessage);
+
+            return response;
+        }
+    }
+
+    public static class ExperimentalPasswordAuthenticator implements Authenticator<LoginResultJson> {
+        @Override
+        public LoginResultJson authenticate(AuthenticationRequest request) {
+            var response = new LoginResultJson();
+
+            var requestData = request.getPasswordRequest();
+            assert requestData != null; // This should never be null.
+            int playerCount = Grasscutter.getGameServer().getPlayers().size();
+
+            boolean successfulLogin = false;
+            String address = request.getRequest().ip();
+            String responseMessage = translate("messages.dispatch.account.username_error");
+            String loggerMessage = "";
+            String decryptedPassword = "";
+
+            // Get Password
+            if (GAME_OPTIONS.uaPatchCompatible) {
+                // Make sure your patch can send passwords in plain text
+                decryptedPassword = request.getPasswordRequest().password;
+            } else {
+                try {
+                    byte[] key = FileUtils.readResource("/keys/auth_private-key.der");
+                    PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(key);
+                    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+                    RSAPrivateKey private_key = (RSAPrivateKey) keyFactory.generatePrivate(keySpec);
+
+                    Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
+
+                    cipher.init(Cipher.DECRYPT_MODE, private_key);
+
+                    decryptedPassword = new String(cipher.doFinal(Utils.base64Decode(request.getPasswordRequest().password)), StandardCharsets.UTF_8);
+                } catch (Exception ignored) {
+                    ignored.printStackTrace();
+                }
+            }
+
+            if (decryptedPassword == null) {
+                successfulLogin = false;
+                loggerMessage = translate("messages.dispatch.account.login_password_error", address);
+                responseMessage = translate("messages.dispatch.account.password_error");
+            }
+
+            // Get account from database.
+            Account account = DatabaseHelper.getAccountByName(requestData.account);
+            if (ACCOUNT.maxPlayer <= -1 || playerCount < ACCOUNT.maxPlayer) {
+                // Check if account exists.
+                if (account == null && ACCOUNT.autoCreate) {
+                    // This account has been created AUTOMATICALLY. There will be no permissions added.
+                    if (decryptedPassword.length() >= 8) {
+                        account = DatabaseHelper.createAccountWithUid(requestData.account, 0);
+                        account.setPassword(BCrypt.withDefaults().hashToString(12, decryptedPassword.toCharArray()));
+                        account.save();
+
+                        // Check if the account was created successfully.
+                        if (account == null) {
+                            responseMessage = translate("messages.dispatch.account.username_create_error");
+                            loggerMessage = translate("messages.dispatch.account.account_login_create_error", address);
+                        } else {
+                            // Continue with login.
+                            successfulLogin = true;
+
+                            // Log the creation.
+                            Grasscutter.getLogger().info(translate("messages.dispatch.account.account_login_create_success", address, response.data.account.uid));
+                        }
+                    } else {
+                        successfulLogin = false;
+                        loggerMessage = translate("messages.dispatch.account.login_password_error", address);
+                        responseMessage = translate("messages.dispatch.account.password_length_error");
+                    }
+                } else if (account != null) {
+                    if (account.getPassword() != null && !account.getPassword().isEmpty()) {
+                        if (BCrypt.verifyer().verify(decryptedPassword.toCharArray(), account.getPassword()).verified) {
+                            successfulLogin = true;
+                        } else {
+                            successfulLogin = false;
+                            loggerMessage = translate("messages.dispatch.account.login_password_error", address);
+                            responseMessage = translate("messages.dispatch.account.password_error");
+                        }
+                    } else {
+                        successfulLogin = false;
+                        loggerMessage = translate("messages.dispatch.account.login_password_storage_error", address);
+                        responseMessage = translate("password_storage_error");
+                    }
+                } else {
+                    loggerMessage = translate("messages.dispatch.account.account_login_exist_error", address);
+                }
+            } else {
+                responseMessage = translate("messages.dispatch.account.server_max_player_limit");
+                loggerMessage = translate("messages.dispatch.account.login_max_player_limit", address);
+            }
+
+
+            // Set response data.
+            if (successfulLogin) {
                 response.message = "OK";
                 response.data.account.uid = account.getId();
                 response.data.account.token = account.generateSessionKey();
@@ -83,7 +204,8 @@ public final class DefaultAuthenticators {
      * Handles the authentication request from the game when using a registry token.
      */
     public static class TokenAuthenticator implements Authenticator<LoginResultJson> {
-        @Override public LoginResultJson authenticate(AuthenticationRequest request) {
+        @Override
+        public LoginResultJson authenticate(AuthenticationRequest request) {
             var response = new LoginResultJson();
 
             var requestData = request.getTokenRequest();
@@ -106,7 +228,7 @@ public final class DefaultAuthenticators {
                 successfulLogin = account != null && account.getSessionKey().equals(requestData.token);
 
                 // Set response data.
-                if(successfulLogin) {
+                if (successfulLogin) {
                     response.message = "OK";
                     response.data.account.uid = account.getId();
                     response.data.account.token = account.getSessionKey();
@@ -138,12 +260,14 @@ public final class DefaultAuthenticators {
      * Handles the authentication request from the game when using a combo token/session key.
      */
     public static class SessionKeyAuthenticator implements Authenticator<ComboTokenResJson> {
-        @Override public ComboTokenResJson authenticate(AuthenticationRequest request) {
+        @Override
+        public ComboTokenResJson authenticate(AuthenticationRequest request) {
             var response = new ComboTokenResJson();
 
             var requestData = request.getSessionKeyRequest();
             var loginData = request.getSessionKeyData();
-            assert requestData != null; assert loginData != null;
+            assert requestData != null;
+            assert loginData != null;
 
             boolean successfulLogin;
             String address = request.getRequest().ip();
@@ -158,7 +282,7 @@ public final class DefaultAuthenticators {
                 successfulLogin = account != null && account.getSessionKey().equals(loginData.token);
 
                 // Set response data.
-                if(successfulLogin) {
+                if (successfulLogin) {
                     response.message = "OK";
                     response.data.open_id = account.getId();
                     response.data.combo_id = "157795300";
@@ -190,17 +314,20 @@ public final class DefaultAuthenticators {
      * Handles authentication requests from external sources.
      */
     public static class ExternalAuthentication implements ExternalAuthenticator {
-        @Override public void handleLogin(AuthenticationRequest request) {
+        @Override
+        public void handleLogin(AuthenticationRequest request) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }
 
-        @Override public void handleAccountCreation(AuthenticationRequest request) {
+        @Override
+        public void handleAccountCreation(AuthenticationRequest request) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }
 
-        @Override public void handlePasswordReset(AuthenticationRequest request) {
+        @Override
+        public void handlePasswordReset(AuthenticationRequest request) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }
@@ -210,17 +337,20 @@ public final class DefaultAuthenticators {
      * Handles authentication requests from OAuth sources.
      */
     public static class OAuthAuthentication implements OAuthAuthenticator {
-        @Override public void handleLogin(AuthenticationRequest request) {
+        @Override
+        public void handleLogin(AuthenticationRequest request) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }
 
-        @Override public void handleRedirection(AuthenticationRequest request, ClientType type) {
+        @Override
+        public void handleRedirection(AuthenticationRequest request, ClientType type) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }
 
-        @Override public void handleTokenProcess(AuthenticationRequest request) {
+        @Override
+        public void handleTokenProcess(AuthenticationRequest request) {
             assert request.getResponse() != null;
             request.getResponse().send("Authentication is not available with the default authentication method.");
         }

src/main/java/emu/grasscutter/command/commands/AccountCommand.java

 package emu.grasscutter.command.commands;
 
+import at.favre.lib.crypto.bcrypt.BCrypt;
+import emu.grasscutter.Configuration;
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.command.Command;
 import emu.grasscutter.command.CommandHandler;
@@ -11,7 +13,7 @@ import java.util.List;
 
 import static emu.grasscutter.utils.Language.translate;
 
-@Command(label = "account", usage = "account <create|delete> <username> [uid]", description = "commands.account.description", targetRequirement = Command.TargetRequirement.NONE)
+@Command(label = "account", usage = "account <create|delete|resetpass> <username> [uid|password] [uid] ", description = "commands.account.description", targetRequirement = Command.TargetRequirement.NONE)
 public final class AccountCommand implements CommandHandler {
 
     @Override
@@ -35,6 +37,30 @@ public final class AccountCommand implements CommandHandler {
                 return;
             case "create":
                 int uid = 0;
+                String password = "";
+
+                if(Configuration.ACCOUNT.EXPERIMENTAL_RealPassword == true) {
+                    if(args.size() < 3) {
+                        CommandHandler.sendMessage(null, "EXPERIMENTAL_RealPassword requires a password argument");
+                        CommandHandler.sendMessage(null, "Usage: account create <username> <password> [uid]");
+
+                        return;
+                    }
+                    password = args.get(2);
+
+                    if (args.size() == 4) {
+                        try {
+                            uid = Integer.parseInt(args.get(3));
+                        } catch (NumberFormatException ignored) {
+                            CommandHandler.sendMessage(null, translate(sender, "commands.account.invalid"));
+                            if(Configuration.ACCOUNT.EXPERIMENTAL_RealPassword == true) {
+                                CommandHandler.sendMessage(null, "EXPERIMENTAL_RealPassword requires argument 2 to be a password, not a uid");
+                                CommandHandler.sendMessage(null, "Usage: account create <username> <password> [uid]");
+                            }
+                            return;
+                        }
+                    }
+                } else {
                     if (args.size() > 2) {
                         try {
                             uid = Integer.parseInt(args.get(2));
@@ -43,12 +69,16 @@ public final class AccountCommand implements CommandHandler {
                             return;
                         }
                     }
+                }
 
                 emu.grasscutter.game.Account account = DatabaseHelper.createAccountWithUid(username, uid);
                 if (account == null) {
                     CommandHandler.sendMessage(null, translate(sender, "commands.account.exists"));
                     return;
                 } else {
+                    if(Configuration.ACCOUNT.EXPERIMENTAL_RealPassword == true) {
+                        account.setPassword(BCrypt.withDefaults().hashToString(12, password.toCharArray()));
+                    }
                     account.addPermission("*");
                     account.save(); // Save account to database.
 
@@ -74,6 +104,37 @@ public final class AccountCommand implements CommandHandler {
                 // Finally, we do the actual deletion.
                 DatabaseHelper.deleteAccount(toDelete);
                 CommandHandler.sendMessage(null, translate(sender, "commands.account.delete"));
+                return;
+            case "resetpass":
+                if(Configuration.ACCOUNT.EXPERIMENTAL_RealPassword != true) {
+                    CommandHandler.sendMessage(null, "resetpass requires EXPERIMENTAL_RealPassword to be true.");
+                    return;
+                }
+
+                if(args.size() != 3) {
+                    CommandHandler.sendMessage(null, "Invalid Args");
+                    CommandHandler.sendMessage(null, "Usage: account resetpass <username> <password>");
+                    return;
+                }
+
+                Account toUpdate = DatabaseHelper.getAccountByName(username);
+
+                if (toUpdate == null) {
+                    CommandHandler.sendMessage(null, translate(sender, "commands.account.no_account"));
+                    return;
+                }
+
+                // Get the player for the account.
+                // If that player is currently online, we kick them before proceeding with the deletion.
+                Player uPlayer = Grasscutter.getGameServer().getPlayerByAccountId(toUpdate.getId());
+                if (uPlayer != null) {
+                    uPlayer.getSession().close();
+                }
+
+                toUpdate.setPassword(BCrypt.withDefaults().hashToString(12, args.get(2).toCharArray()));
+                toUpdate.save();
+                CommandHandler.sendMessage(null, "Password Updated.");
+                return;
         }
     }
 }

src/main/java/emu/grasscutter/server/http/HttpServer.java

@@ -11,7 +11,7 @@ import org.eclipse.jetty.server.ServerConnector;
 import org.eclipse.jetty.util.ssl.SslContextFactory;
 
 import java.io.File;
-import java.io.IOException;
+import java.io.UnsupportedEncodingException;
 
 import static emu.grasscutter.Configuration.*;
 import static emu.grasscutter.utils.Language.translate;
@@ -126,8 +126,9 @@ public final class HttpServer {
 
     /**
      * Starts listening on the HTTP server.
+     * @throws UnsupportedEncodingException
      */
-    public void start() {
+    public void start() throws UnsupportedEncodingException {
         // Attempt to start the HTTP server.
         if(HTTP_INFO.bindAddress.equals("")){
             this.express.listen(HTTP_INFO.bindPort);

src/main/java/emu/grasscutter/server/http/dispatch/RegionHandler.java

 package emu.grasscutter.server.http.dispatch;
 
 import com.google.protobuf.ByteString;
-import com.google.protobuf.InvalidProtocolBufferException;
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.Grasscutter.ServerRunMode;
-import emu.grasscutter.net.proto.QueryCurrRegionHttpRspOuterClass.*;
-import emu.grasscutter.net.proto.RegionInfoOuterClass;
+import emu.grasscutter.net.proto.QueryCurrRegionHttpRspOuterClass.QueryCurrRegionHttpRsp;
 import emu.grasscutter.net.proto.RegionInfoOuterClass.RegionInfo;
 import emu.grasscutter.net.proto.RegionSimpleInfoOuterClass.RegionSimpleInfo;
 import emu.grasscutter.server.event.dispatch.QueryAllRegionsEvent;
 import emu.grasscutter.server.event.dispatch.QueryCurrentRegionEvent;
 import emu.grasscutter.server.http.Router;
+import emu.grasscutter.server.http.objects.QueryCurRegionRspJson;
 import emu.grasscutter.utils.Crypto;
-import emu.grasscutter.utils.FileUtils;
 import emu.grasscutter.utils.Utils;
 import express.Express;
 import express.http.Request;
 import express.http.Response;
 import io.javalin.Javalin;
 
-import java.io.File;
-import java.util.ArrayList;
-import java.util.Base64;
-import java.util.List;
-import java.util.Map;
+import javax.crypto.Cipher;
+import java.io.ByteArrayOutputStream;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
+import java.security.Signature;
+
 
 import static emu.grasscutter.Configuration.*;
-import static emu.grasscutter.net.proto.QueryRegionListHttpRspOuterClass.*;
+import static emu.grasscutter.net.proto.QueryRegionListHttpRspOuterClass.QueryRegionListHttpRsp;
 
 /**
  * Handles requests related to region queries.
@@ -127,19 +125,72 @@ public final class RegionHandler implements Router {
     private static void queryCurrentRegion(Request request, Response response) {
         // Get region to query.
         String regionName = request.params("region");
+        String versionName = request.query("version");
+        var region = regions.get(regionName);
 
         // Get region data.
         String regionData = "CAESGE5vdCBGb3VuZCB2ZXJzaW9uIGNvbmZpZw==";
         if (request.query().values().size() > 0) {
-            var region = regions.get(regionName);
-            if(region != null) regionData = region.getBase64();
+            if(region != null)
+                regionData = region.getBase64();
+        }
+
+        if( versionName.contains("2.7.5") || versionName.contains("2.8.")) {
+            try {
+                QueryCurrentRegionEvent event = new QueryCurrentRegionEvent(regionData); event.call();
+
+                if (GAME_OPTIONS.uaPatchCompatible) {
+                    // More love for UA Patch players
+
+                    var rsp = new QueryCurRegionRspJson();
+
+                    rsp.content = event.getRegionInfo();
+                    rsp.sign = "TW9yZSBsb3ZlIGZvciBVQSBQYXRjaCBwbGF5ZXJz";
+
+                    response.send(rsp);
+                    return;
+                }
+
+                String key_id = request.query("key_id");
+                Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
+                cipher.init(Cipher.ENCRYPT_MODE, key_id.equals("3") ? Crypto.CUR_OS_ENCRYPT_KEY : Crypto.CUR_CN_ENCRYPT_KEY);
+                var regionInfo = Utils.base64Decode(event.getRegionInfo());
+
+                //Encrypt regionInfo in chunks
+                ByteArrayOutputStream encryptedRegionInfoStream = new ByteArrayOutputStream();
+
+                //Thank you so much GH Copilot
+                int chunkSize = 256 - 11;
+                int regionInfoLength = regionInfo.length;
+                int numChunks = (int) Math.ceil(regionInfoLength / (double) chunkSize);
+
+                for (int i = 0; i < numChunks; i++) {
+                    byte[] chunk = Arrays.copyOfRange(regionInfo, i * chunkSize, Math.min((i + 1) * chunkSize, regionInfoLength));
+                    byte[] encryptedChunk = cipher.doFinal(chunk);
+                    encryptedRegionInfoStream.write(encryptedChunk);
                 }
 
+                Signature privateSignature = Signature.getInstance("SHA256withRSA");
+                privateSignature.initSign(Crypto.CUR_SIGNING_KEY);
+                privateSignature.update(regionInfo);
+
+                var rsp = new QueryCurRegionRspJson();
+
+                rsp.content = Utils.base64Encode(encryptedRegionInfoStream.toByteArray());
+                rsp.sign = Utils.base64Encode(privateSignature.sign());
+
+                response.send(rsp);
+            }
+            catch (Exception e) {
+                Grasscutter.getLogger().error("An error occurred while handling query_cur_region.", e);
+            }
+        }
+        else {
             // Invoke event.
             QueryCurrentRegionEvent event = new QueryCurrentRegionEvent(regionData); event.call();
             // Respond with event result.
             response.send(event.getRegionInfo());
-
+        }
         // Log to console.
         Grasscutter.getLogger().info(String.format("Client %s request: query_cur_region/%s", request.ip(), regionName));
     }

src/main/java/emu/grasscutter/server/http/objects/QueryCurRegionRspJson.java

+package emu.grasscutter.server.http.objects;
+
+public class QueryCurRegionRspJson {
+    public String content;
+    public String sign;
+}

src/main/java/emu/grasscutter/server/packet/recv/HandlerGetPlayerTokenReq.java

 package emu.grasscutter.server.packet.recv;
 
 import static emu.grasscutter.Configuration.ACCOUNT;
+import static emu.grasscutter.Configuration.GAME_OPTIONS;
 
 import emu.grasscutter.Grasscutter;
 import emu.grasscutter.database.DatabaseHelper;
@@ -14,6 +15,14 @@ import emu.grasscutter.server.event.game.PlayerCreationEvent;
 import emu.grasscutter.server.game.GameSession;
 import emu.grasscutter.server.game.GameSession.SessionState;
 import emu.grasscutter.server.packet.send.PacketGetPlayerTokenRsp;
+import emu.grasscutter.utils.ByteHelper;
+import emu.grasscutter.utils.Crypto;
+import emu.grasscutter.utils.Utils;
+
+import javax.crypto.Cipher;
+
+import java.nio.ByteBuffer;
+import java.security.Signature;
 
 @Opcodes(PacketOpcodes.GetPlayerTokenReq)
 public class HandlerGetPlayerTokenReq extends PacketHandler {
@@ -90,8 +99,45 @@ public class HandlerGetPlayerTokenReq extends PacketHandler {
 		session.setUseSecretKey(true);
 		session.setState(SessionState.WAITING_FOR_LOGIN);
 
+        // Only >= 2.7.50 has this
+        if (req.getKeyId() > 0) {
+            if (GAME_OPTIONS.uaPatchCompatible) {
+                // More love for ua patch plz 😭
+
+                byte[] clientBytes = Utils.base64Decode(req.getClientSeed());
+                byte[] seed = ByteHelper.longToBytes(Crypto.ENCRYPT_SEED);
+                Crypto.xor(clientBytes, seed);
+
+                String base64str = Utils.base64Encode(clientBytes);
+
+                session.send(new PacketGetPlayerTokenRsp(session, base64str, "bm90aGluZyBoZXJl"));
+                return;
+            }
+
+            Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
+            cipher.init(Cipher.DECRYPT_MODE, Crypto.CUR_SIGNING_KEY);
+
+            var client_seed_encrypted = Utils.base64Decode(req.getClientSeed());
+            var client_seed = ByteBuffer.wrap(cipher.doFinal(client_seed_encrypted))
+                .getLong();
+
+            byte[] seed_bytes = ByteBuffer.wrap(new byte[8])
+                .putLong(Crypto.ENCRYPT_SEED ^ client_seed)
+                .array();
+
+            //Kind of a hack, but whatever
+            cipher.init(Cipher.ENCRYPT_MODE, req.getKeyId() == 3 ? Crypto.CUR_OS_ENCRYPT_KEY : Crypto.CUR_CN_ENCRYPT_KEY);
+            var seed_encrypted = cipher.doFinal(seed_bytes);
+
+            Signature privateSignature = Signature.getInstance("SHA256withRSA");
+            privateSignature.initSign(Crypto.CUR_SIGNING_KEY);
+            privateSignature.update(seed_bytes);
+
+            session.send(new PacketGetPlayerTokenRsp(session, Utils.base64Encode(seed_encrypted), Utils.base64Encode(privateSignature.sign())));
+        }
+        else {
             // Send packet
             session.send(new PacketGetPlayerTokenRsp(session));
         }
-
+    }
 }

src/main/java/emu/grasscutter/server/packet/send/PacketGetPlayerTokenRsp.java

@@ -51,4 +51,29 @@ public class PacketGetPlayerTokenRsp extends BasePacket {
 
         this.setData(p.toByteArray());
     }
+
+    public PacketGetPlayerTokenRsp(GameSession session, String encryptedSeed, String encryptedSeedSign) {
+        super(PacketOpcodes.GetPlayerTokenRsp, true);
+
+        this.setUseDispatchKey(true);
+
+        GetPlayerTokenRsp p = GetPlayerTokenRsp.newBuilder()
+            .setUid(session.getPlayer().getUid())
+            .setToken(session.getAccount().getToken())
+            .setAccountType(1)
+            .setIsProficientPlayer(session.getPlayer().getAvatars().getAvatarCount() > 0) // Not sure where this goes
+            .setSecretKeySeed(Crypto.ENCRYPT_SEED)
+            .setSecurityCmdBuffer(ByteString.copyFrom(Crypto.ENCRYPT_SEED_BUFFER))
+            .setPlatformType(3)
+            .setChannelId(1)
+            .setCountryCode("US")
+            .setClientVersionRandomKey("c25-314dd05b0b5f")
+            .setRegPlatform(3)
+            .setClientIpStr(session.getAddress().getAddress().getHostAddress())
+            .setEncryptedSeed(encryptedSeed)
+            .setSeedSignature(encryptedSeedSign)
+            .build();
+
+        this.setData(p.toByteArray());
+    }
 }

src/main/java/emu/grasscutter/utils/ByteHelper.java

+package emu.grasscutter.utils;
+
+public class ByteHelper {
+    public static byte[] changeBytes(byte[] a) {
+        byte[] b = new byte[a.length];
+        for (int i = 0; i < a.length; i++) {
+            b[i] = a[a.length - i - 1];
+        }
+        return b;
+    }
+
+    public static byte[] longToBytes(long x) {
+        byte[] bytes = new byte[8];
+        bytes[0] = (byte) (x >> 56);
+        bytes[1] = (byte) (x >> 48);
+        bytes[2] = (byte) (x >> 40);
+        bytes[3] = (byte) (x >> 32);
+        bytes[4] = (byte) (x >> 24);
+        bytes[5] = (byte) (x >> 16);
+        bytes[6] = (byte) (x >> 8);
+        bytes[7] = (byte) (x);
+        return bytes;
+    }
+}
\ No newline at end of file

src/main/java/emu/grasscutter/utils/ConfigContainer.java

@@ -112,6 +112,7 @@ public class ConfigContainer {
 
     public static class Account {
         public boolean autoCreate = false;
+        public boolean EXPERIMENTAL_RealPassword = false;
         public String[] defaultPermissions = {};
         public int maxPlayer = -1;
     }
@@ -210,6 +211,7 @@ public class ConfigContainer {
             public int cap = 160;
             public int rechargeTime = 480;
         }
+        public boolean uaPatchCompatible = false;
     }
 
     public static class JoinOptions {

src/main/java/emu/grasscutter/utils/Crypto.java

 package emu.grasscutter.utils;
 
+import java.security.KeyFactory;
+import java.security.PrivateKey;
+import java.security.PublicKey;
 import java.security.SecureRandom;
-import java.util.Base64;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
 
 import emu.grasscutter.Grasscutter;
-import emu.grasscutter.net.proto.GetPlayerTokenRspOuterClass.GetPlayerTokenRsp;
-import emu.grasscutter.net.proto.QueryCurrRegionHttpRspOuterClass.QueryCurrRegionHttpRsp;
-
-import static emu.grasscutter.Configuration.*;
 
 public final class Crypto {
 	private static final SecureRandom secureRandom = new SecureRandom();
@@ -19,12 +19,31 @@ public final class Crypto {
 	public static long ENCRYPT_SEED = Long.parseUnsignedLong("11468049314633205968");
 	public static byte[] ENCRYPT_SEED_BUFFER = new byte[0];
 
+    public static PublicKey CUR_OS_ENCRYPT_KEY;
+    public static PublicKey CUR_CN_ENCRYPT_KEY;
+    public static PrivateKey CUR_SIGNING_KEY;
+
 	public static void loadKeys() {
 		DISPATCH_KEY = FileUtils.readResource("/keys/dispatchKey.bin");
 		DISPATCH_SEED = FileUtils.readResource("/keys/dispatchSeed.bin");
 
 		ENCRYPT_KEY = FileUtils.readResource("/keys/secretKey.bin");
 		ENCRYPT_SEED_BUFFER = FileUtils.readResource("/keys/secretKeyBuffer.bin");
+
+        try {
+            //These should be loaded from ChannelConfig_whatever.json
+            CUR_SIGNING_KEY = KeyFactory.getInstance("RSA")
+                .generatePrivate(new PKCS8EncodedKeySpec(FileUtils.readResource("/keys/SigningKey.der")));
+
+            CUR_OS_ENCRYPT_KEY = KeyFactory.getInstance("RSA")
+                .generatePublic(new X509EncodedKeySpec(FileUtils.readResource("/keys/OSCB_Pub.der")));
+
+            CUR_CN_ENCRYPT_KEY = KeyFactory.getInstance("RSA")
+                .generatePublic(new X509EncodedKeySpec(FileUtils.readResource("/keys/OSCN_Pub.der")));
+        }
+        catch (Exception e) {
+            Grasscutter.getLogger().error("An error occurred while loading keys.", e);
+        }
 	}
 
 	public static void xor(byte[] packet, byte[] key) {

src/main/resources/languages/en-US.json

@@ -28,6 +28,8 @@
         "login_token_attempt": "[Dispatch] Client %s is trying to log in via token.",
         "login_token_error": "[Dispatch] Client %s failed to log in via token.",
         "login_token_success": "[Dispatch] Client %s logged in via token as %s.",
+        "login_password_error": "[Dispatch] Client %s failed to log in via password.",
+        "login_password_storage_error": "[Dispatch] Client %s failed to log in via password because there is no password in the database.",
         "combo_token_success": "[Dispatch] Client %s succeed to exchange combo token.",
         "combo_token_error": "[Dispatch] Client %s failed to exchange combo token.",
         "account_login_create_success": "[Dispatch] Client %s failed to log in: Account %s created.",
@@ -37,6 +39,9 @@
         "session_key_error": "Wrong session key.",
         "username_error": "Username not found.",
         "username_create_error": "Username not found, create failed.",
+        "password_error": "Invalid Password",
+        "password_length_error": "Password length must be greater then or equal to 8",
+        "password_storage_error": "You don't have a password for your account. Please contact an administrator.",
         "server_max_player_limit": "The number of online players has reached the limit"
       },
       "router_error": "[Dispatch] Unable to attach router."