Impl new auth method to avoid using sessionKey

gc-plugin/src/main/java/com/mojo/consoleplus/AuthHandler.java

@@ -0,0 +1,53 @@
+package com.mojo.consoleplus;
+import java.security.MessageDigest;
+import java.util.UUID;
+import com.mojo.consoleplus.ConsolePlus;
+
+public class AuthHandler {
+    public static String signatureStub;
+    
+    public AuthHandler(){
+        try {
+            signatureStub = UUID.randomUUID().toString();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public AuthHandler(String stub) {
+        signatureStub = stub;
+    }
+
+    public Boolean auth(int uid, long expire, String dg) {
+        return digestUid(uid+":"+expire).equals(dg);
+    }
+
+    public String genKey(int uid, long expire){
+        String part1 = uid +":"+expire;
+
+        return part1 + ":" + digestUid(part1);
+    }
+
+    private String digestUid(String payload) {
+        MessageDigest digest;
+        try {
+            digest = MessageDigest.getInstance("SHA-256");
+            return bytesToHex(digest.digest((payload + ":" + signatureStub).getBytes("UTF-8")));
+        } catch (Exception e) {
+            e.printStackTrace();
+            return "";
+        }
+    }
+
+    private static String bytesToHex(byte[] hash) {
+        StringBuilder hexString = new StringBuilder(2 * hash.length);
+        for (int i = 0; i < hash.length; i++) {
+            String hex = Integer.toHexString(0xff & hash[i]);
+            if(hex.length() == 1) {
+                hexString.append('0');
+            }
+            hexString.append(hex);
+        }
+        return hexString.toString();
+    }
+}

gc-plugin/src/main/java/com/mojo/consoleplus/ConsolePlus.java

@@ -22,6 +22,7 @@ import com.mojo.consoleplus.config.MojoConfig;
 public class ConsolePlus extends Plugin{
     public static MojoConfig config = MojoConfig.loadConfig();
     public static String versionTag;
+    public static AuthHandler authHandler;
 
     @Override
     public void onLoad() {
@@ -58,7 +59,7 @@ public class ConsolePlus extends Plugin{
         Grasscutter.getHttpServer().addRouter(RequestHandler.class);
         CommandMap.getInstance().registerCommand("mojoconsole", new PluginCommand());
         this.getLogger().info("[MojoConsole] enabled. Version: " + versionTag);
-
+        authHandler = new AuthHandler();
     }
 
     @Override

gc-plugin/src/main/java/com/mojo/consoleplus/RequestHandler.java

@@ -1,5 +1,8 @@
 package com.mojo.consoleplus;
 
+import static java.lang.Integer.parseInt;
+import static java.lang.Long.parseLong;
+
 import java.io.IOException;
 import java.util.Map;
 
@@ -34,20 +37,39 @@ public final class RequestHandler implements Router {
 	public static void processRequest(Request req, Response res) throws IOException {
         RequestJson request = req.body(RequestJson.class);
         res.type("application/json");
-        if (request.k != null) {
+        Player player = null;
+        if (request.k != null) { // version 1 token
             Account account = DatabaseHelper.getAccountBySessionKey(request.k);
             Map<Integer, Player> playersMap = Grasscutter.getGameServer().getPlayers();
-            Player player = null;
             // String invokeResult = "";
-            MessageHandler resultCollector = new MessageHandler();
             if (account != null) {
                 for (int playerid: playersMap.keySet()) {
                     if (playersMap.get(playerid).getUid() == account.getPlayerUid()) {
                         player = playersMap.get(playerid);
                     }
                 }
+            }
+        }
+
+        if (request.k2 != null) { // version 2 token
+            int uid; 
+            long expire;
+            String hashDigest;
+            uid = parseInt(request.k2.split(":")[0]);
+            expire = parseLong(request.k2.split(":")[1]);
+            hashDigest = request.k2.split(":")[2];
+            if (ConsolePlus.authHandler.auth(uid, expire, hashDigest)){
+                Map<Integer, Player> playersMap = Grasscutter.getGameServer().getPlayers();
+                for (int playerid: playersMap.keySet()) {
+                    if (playersMap.get(playerid).getUid() == uid) {
+                        player = playersMap.get(playerid);
+                    }
+                }
+            }
+        }
+
         if (player != null) {
-                    // player.setInvokeResult("[MojoConsole]");
+            MessageHandler resultCollector = new MessageHandler();
             player.setMessageHandler(resultCollector); // hook the message
             switch (request.request){
                 case "invoke":
@@ -69,8 +91,7 @@ public final class RequestHandler implements Router {
             player.setMessageHandler(null);
             return;
         }
-            }
+
-        }
         res.json(new ResponseJson("403 Forbidden", 403));
     }
 }

gc-plugin/src/main/java/com/mojo/consoleplus/command/PluginCommand.java

@@ -1,6 +1,7 @@
 package com.mojo.consoleplus.command;
 
 import java.net.URLEncoder;
+import java.util.HashMap;
 import java.util.List;
 
 import emu.grasscutter.Grasscutter;
@@ -17,24 +18,27 @@ import com.google.gson.Gson;
         "mojo" }, permission = "mojo.console")
 public class PluginCommand implements CommandHandler {
     static class HashParams{
-        public String k; // session key
+        public String k2; // session key
         public String d; // mojo backend url
     }
     @Override
     public void execute(Player sender, Player targetPlayer, List<String> args) {
         Mail mail = new Mail();
-        String link = getServerURL(targetPlayer.getAccount().getSessionKey());
+        String authKey = ConsolePlus.authHandler.genKey(sender.getUid(), System.currentTimeMillis() / 1000 + ConsolePlus.config.mail.expireHour * 3600);
+        String link = getServerURL(authKey);
         String link_type = "webview";
         Grasscutter.getLogger().info(link);
-        if (args.size() > 0 && args.get(0).equals("o")) {
+        if (args.size() > 0) {
+            if (args.get(0).equals("o")){
                 link_type = "browser";
             }
+        }
 
         mail.mailContent.title = ConsolePlus.config.mail.title;
         mail.mailContent.sender = ConsolePlus.config.mail.author;
         mail.mailContent.content = ConsolePlus.config.mail.content.replace("{{ LINK }}", "<type=\""+ link_type + "\" text=\"Mojo Console\" href=\"" + link + "\"/>");
         mail.expireTime = System.currentTimeMillis() / 1000 + 3600 * ConsolePlus.config.mail.expireHour;
-        targetPlayer.sendMail(mail);
+        sender.sendMail(mail);
         CommandHandler.sendMessage(sender, ConsolePlus.config.responseMessage);
     }
 
@@ -42,16 +46,21 @@ public class PluginCommand implements CommandHandler {
         if (ConsolePlus.config.UseCDN){
             Gson gson = new Gson();
             HashParams hp = new HashParams();
-            hp.k = sessionKey;
+            hp.k2 = sessionKey;
             hp.d = getMojoBackendURL();
+            try {
+                sessionKey = URLEncoder.encode(sessionKey, "utf-8");
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
             try{
                 return ConsolePlus.config.CDNLink + "#" + URLEncoder.encode(gson.toJson(hp), "utf-8");
             } catch (Exception e){
                 e.printStackTrace();
-                return ConsolePlus.config.CDNLink +  "?k=" + sessionKey;
+                return ConsolePlus.config.CDNLink +  "?k2=" + sessionKey;
             }
         } else {
-            return getMojoBackendURL() + ConsolePlus.config.interfacePath + "?k=" + sessionKey;
+            return getMojoBackendURL() + ConsolePlus.config.interfacePath + "?k2=" + sessionKey;
         }
     }
 

gc-plugin/src/main/java/com/mojo/consoleplus/forms/RequestJson.java

@@ -1,7 +1,8 @@
 package com.mojo.consoleplus.forms;
 
 public final class RequestJson {
-    public String k = "";
+    public String k;
+	public String k2;
 	public String request = "";
 	public String payload = "";
 }