From 787f8d3423a8950b60603c36b6d13f8ea7ffbc04 Mon Sep 17 00:00:00 2001
From: Romain Beaumont <romain.rom1@gmail.com>
Date: Sat, 7 Nov 2015 22:06:49 +0100
Subject: [PATCH] fix gamemode3 in proxy : fix #146 * correctly generate the
 same uuidv3 than the vanilla server does in offline mode : fix #282 * remove
 "one player online mode" in the proxy : it doesn't make sense to identify all
 players as the user/passwd given in the cli. Now both servers in offline
 mode.

---
 examples/proxy/proxy.js | 10 ++--------
 package.json            |  5 +++--
 src/createServer.js     | 20 +++++++++++++++++++-
 3 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/examples/proxy/proxy.js b/examples/proxy/proxy.js
index d5baf4e..38d9a4c 100644
--- a/examples/proxy/proxy.js
+++ b/examples/proxy/proxy.js
@@ -2,7 +2,7 @@ var mc = require('../../');
 
 var states = mc.states;
 function printHelpAndExit(exitCode) {
-  console.log("usage: node proxy.js [<options>...] <target_srv> <user> [<password>] [<version>]");
+  console.log("usage: node proxy.js [<options>...] <target_srv> [<version>]");
   console.log("options:");
   console.log("  --dump name");
   console.log("    print to stdout messages with the specified name.");
@@ -35,8 +35,6 @@ process.argv.forEach(function(val, index, array) {
 var args = process.argv.slice(2);
 var host;
 var port = 25565;
-var user;
-var passwd;
 var version;
 
 var printAllNames = false;
@@ -62,8 +60,6 @@ var printNameBlacklist = {};
   }
   if(!(i + 2 <= args.length && args.length <= i + 4)) printHelpAndExit(1);
   host = args[i++];
-  user = args[i++];
-  passwd = args[i++];
   version = args[i++];
 })();
 
@@ -98,9 +94,7 @@ srv.on('login', function(client) {
   var targetClient = mc.createClient({
     host: host,
     port: port,
-    username: user,
-    password: passwd,
-    'online-mode': passwd != null ? true : false,
+    username: client.username,
     keepAlive:false,
     version:version
   });
diff --git a/package.json b/package.json
index f7ae3ae..9cc1583 100644
--- a/package.json
+++ b/package.json
@@ -46,12 +46,13 @@
     "minecraft-data": "^0.13.0",
     "node-uuid": "~1.4.1",
     "prismarine-nbt": "0.0.1",
+    "protodef": "0.2.0",
     "readable-stream": "^1.1.0",
     "superagent": "~0.10.0",
     "ursa-purejs": "0.0.3",
     "uuid": "^2.0.1",
-    "yggdrasil": "0.1.0",
-    "protodef":"0.2.0"
+    "uuid-1345": "^0.99.6",
+    "yggdrasil": "0.1.0"
   },
   "optionalDependencies": {
     "ursa": "~0.9.1"
diff --git a/src/createServer.js b/src/createServer.js
index 814a1d4..543300a 100644
--- a/src/createServer.js
+++ b/src/createServer.js
@@ -4,6 +4,7 @@ var yggserver = require('yggdrasil').server({});
 var states = require("./states");
 var bufferEqual = require('buffer-equal');
 var Server = require('./server');
+var UUID = require('uuid-1345');
 
 module.exports=createServer;
 
@@ -194,10 +195,27 @@ function createServer(options) {
       }
     }
 
+
+    // https://github.com/openjdk-mirror/jdk7u-jdk/blob/f4d80957e89a19a29bb9f9807d2a28351ed7f7df/src/share/classes/java/util/UUID.java#L163
+    function javaUUID(s)
+    {
+      var hash = crypto.createHash("md5");
+      hash.update(s, 'utf8');
+      var buffer = hash.digest();
+      buffer[6] = (buffer[6] & 0x0f) | 0x30;
+      buffer[8] = (buffer[8] & 0x3f) | 0x80;
+      return buffer;
+    }
+
+    function nameToMcOfflineUUID(name)
+    {
+      return (new UUID(javaUUID("OfflinePlayer:"+name))).toString();
+    }
+
     function loginClient() {
       var isException = !!server.onlineModeExceptions[client.username.toLowerCase()];
       if(onlineMode == false || isException) {
-        client.uuid = "0-0-0-0-0";
+        client.uuid = nameToMcOfflineUUID(client.username);
       }
       client.write('compress', { threshold: 256 }); // Default threshold is 256
       client.compressionThreshold = 256;