Update CraftBukkit to Minecraft 1.7.8

pom.xml

@@ -4,7 +4,7 @@
   <groupId>org.bukkit</groupId>
   <artifactId>craftbukkit</artifactId>
   <packaging>jar</packaging>
-  <version>1.7.5-R0.1-SNAPSHOT</version>
+  <version>1.7.8-R0.1-SNAPSHOT</version>
   <name>CraftBukkit</name>
   <url>http://www.bukkit.org</url>
 
@@ -12,8 +12,8 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <api.version>unknown</api.version>
     <junit.version>4.11</junit.version>
-    <minecraft.version>1.7.5</minecraft.version>
-    <minecraft_version>1_7_R2</minecraft_version>
+    <minecraft.version>1.7.8</minecraft.version>
+    <minecraft_version>1_7_R3</minecraft_version>
     <buildtag.prefix>git-Bukkit-</buildtag.prefix>
     <buildtag.suffix></buildtag.suffix>
   </properties>

src/main/java/net/minecraft/server/BlockSkull.java

@@ -84,9 +84,12 @@ public class BlockSkull extends BlockContainer {
             ItemStack itemstack = new ItemStack(Items.SKULL, 1, this.getDropData(world, i, j, k));
             TileEntitySkull tileentityskull = (TileEntitySkull) world.getTileEntity(i, j, k);
 
-            if (tileentityskull.getSkullType() == 3 && tileentityskull.getExtraType() != null && tileentityskull.getExtraType().length() > 0) {
+            if (tileentityskull.getSkullType() == 3 && tileentityskull.getGameProfile() != null) {
                 itemstack.setTag(new NBTTagCompound());
-                itemstack.getTag().setString("SkullOwner", tileentityskull.getExtraType());
+                NBTTagCompound nbttagcompound = new NBTTagCompound();
+
+                GameProfileSerializer.a(nbttagcompound, tileentityskull.getGameProfile());
+                itemstack.getTag().set("SkullOwner", nbttagcompound);
             }
 
             this.a(world, i, j, k, itemstack);
@@ -112,9 +115,12 @@ public class BlockSkull extends BlockContainer {
                 ItemStack itemstack = new ItemStack(Items.SKULL, 1, this.getDropData(world, i, j, k));
                 TileEntitySkull tileentityskull = (TileEntitySkull) world.getTileEntity(i, j, k);
 
-                if (tileentityskull.getSkullType() == 3 && tileentityskull.getExtraType() != null && tileentityskull.getExtraType().length() > 0) {
+                if (tileentityskull.getSkullType() == 3 && tileentityskull.getGameProfile() != null) {
                     itemstack.setTag(new NBTTagCompound());
-                    itemstack.getTag().setString("SkullOwner", tileentityskull.getExtraType());
+                    NBTTagCompound nbttagcompound = new NBTTagCompound();
+
+                    GameProfileSerializer.a(nbttagcompound, tileentityskull.getGameProfile());
+                    itemstack.getTag().set("SkullOwner", nbttagcompound);
                 }
 
                 this.a(world, i, j, k, itemstack);

src/main/java/net/minecraft/server/ChunkProviderServer.java

@@ -8,6 +8,7 @@ import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
+import net.minecraft.util.com.google.common.collect.Lists;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -317,12 +318,15 @@ public class ChunkProviderServer implements IChunkProvider {
                 ChunkUnloadEvent event = new ChunkUnloadEvent(chunk.bukkitChunk);
                 server.getPluginManager().callEvent(event);
                 if (!event.isCancelled()) {
-                    chunk.removeEntities();
-                    this.saveChunk(chunk);
-                    this.saveChunkNOP(chunk);
+                    if (chunk != null) {
+                        chunk.removeEntities();
+                        this.saveChunk(chunk);
+                        this.saveChunkNOP(chunk);
+                        this.chunks.remove(chunkcoordinates); // CraftBukkit
+                    }
+
                     // this.unloadQueue.remove(olong);
                     // this.chunks.remove(olong.longValue());
-                    this.chunks.remove(chunkcoordinates); // CraftBukkit
                 }
             }
             // CraftBukkit end

src/main/java/net/minecraft/server/ChunkRegionLoader.java

@@ -1,6 +1,5 @@
 package net.minecraft.server;
 
-import java.io.DataInput;
 import java.io.DataInputStream;
 import java.io.DataOutput;
 import java.io.DataOutputStream;
@@ -81,7 +80,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
                 return null;
             }
 
-            nbttagcompound = NBTCompressedStreamTools.a((DataInput) datainputstream);
+            nbttagcompound = NBTCompressedStreamTools.a(datainputstream);
         }
 
         return this.a(world, i, j, nbttagcompound);

src/main/java/net/minecraft/server/DedicatedServer.java

@@ -23,14 +23,14 @@ import org.bukkit.event.server.ServerCommandEvent;
 
 public class DedicatedServer extends MinecraftServer implements IMinecraftServer {
 
-    private static final Logger h = LogManager.getLogger();
-    private final List i = Collections.synchronizedList(new ArrayList());
-    private RemoteStatusListener j;
-    private RemoteControlListener k;
+    private static final Logger i = LogManager.getLogger();
+    private final List j = Collections.synchronizedList(new ArrayList());
+    private RemoteStatusListener k;
+    private RemoteControlListener l;
     public PropertyManager propertyManager; // CraftBukkit - private -> public
     private boolean generateStructures;
-    private EnumGamemode n;
-    private boolean o;
+    private EnumGamemode o;
+    private boolean p;
 
     // CraftBukkit start - Signature changed
     public DedicatedServer(joptsimple.OptionSet options) {
@@ -67,14 +67,14 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         System.setErr(new PrintStream(new LoggerOutputStream(logger, Level.WARN), true));
         // CraftBukkit end
 
-        h.info("Starting minecraft server version 1.7.5");
+        i.info("Starting minecraft server version 1.7.8");
         if (Runtime.getRuntime().maxMemory() / 1024L / 1024L < 512L) {
-            h.warn("To start the server with more ram, launch it as \"java -Xmx1024M -Xms1024M -jar minecraft_server.jar\"");
+            i.warn("To start the server with more ram, launch it as \"java -Xmx1024M -Xms1024M -jar minecraft_server.jar\"");
         }
 
-        h.info("Loading properties");
+        i.info("Loading properties");
         this.propertyManager = new PropertyManager(this.options); // CraftBukkit - CLI argument support
-        if (this.M()) {
+        if (this.N()) {
             this.c("127.0.0.1");
         } else {
             this.setOnlineMode(this.propertyManager.getBoolean("online-mode", true));
@@ -96,112 +96,122 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         }
 
         this.generateStructures = this.propertyManager.getBoolean("generate-structures", true);
-        int i = this.propertyManager.getInt("gamemode", EnumGamemode.SURVIVAL.a());
+        int gamemode = this.propertyManager.getInt("gamemode", EnumGamemode.SURVIVAL.a()); // CraftBukkit - Unique name to avoid stomping on logger
 
-        this.n = WorldSettings.a(i);
-        h.info("Default game type: " + this.n);
+        this.o = WorldSettings.a(gamemode); // CraftBukkit - Use new name
+        i.info("Default game type: " + this.o);
         InetAddress inetaddress = null;
 
         if (this.getServerIp().length() > 0) {
             inetaddress = InetAddress.getByName(this.getServerIp());
         }
 
-        if (this.K() < 0) {
+        if (this.L() < 0) {
             this.setPort(this.propertyManager.getInt("server-port", 25565));
         }
 
-        h.info("Generating keypair");
+        i.info("Generating keypair");
         this.a(MinecraftEncryption.b());
-        h.info("Starting Minecraft server on " + (this.getServerIp().length() == 0 ? "*" : this.getServerIp()) + ":" + this.K());
+        i.info("Starting Minecraft server on " + (this.getServerIp().length() == 0 ? "*" : this.getServerIp()) + ":" + this.L());
 
         try {
-            this.ah().a(inetaddress, this.K());
+            this.ai().a(inetaddress, this.L());
         } catch (Throwable ioexception) { // CraftBukkit - IOException -> Throwable
-            h.warn("**** FAILED TO BIND TO PORT!");
-            h.warn("The exception was: {}", new Object[] { ioexception.toString()});
-            h.warn("Perhaps a server is already running on that port?");
+            i.warn("**** FAILED TO BIND TO PORT!");
+            i.warn("The exception was: {}", new Object[] { ioexception.toString()});
+            i.warn("Perhaps a server is already running on that port?");
             return false;
         }
 
         this.a((PlayerList) (new DedicatedPlayerList(this))); // CraftBukkit
 
         if (!this.getOnlineMode()) {
-            h.warn("**** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!");
-            h.warn("The server will make no attempt to authenticate usernames. Beware.");
-            h.warn("While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.");
-            h.warn("To change this, set \"online-mode\" to \"true\" in the server.properties file.");
+            i.warn("**** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!");
+            i.warn("The server will make no attempt to authenticate usernames. Beware.");
+            i.warn("While this makes the game possible to play without internet access, it also opens up the ability for hackers to connect with any username they choose.");
+            i.warn("To change this, set \"online-mode\" to \"true\" in the server.properties file.");
         }
 
-        // this.a((PlayerList) (new DedicatedPlayerList(this))); // CraftBukkit - moved up
-        this.convertable = new WorldLoaderServer(server.getWorldContainer()); // CraftBukkit - moved from MinecraftServer constructor
-        long j = System.nanoTime();
-
-        if (this.N() == null) {
-            this.k(this.propertyManager.getString("level-name", "world"));
+        if (this.aE()) {
+            this.getUserCache().c();
         }
 
-        String s = this.propertyManager.getString("level-seed", "");
-        String s1 = this.propertyManager.getString("level-type", "DEFAULT");
-        String s2 = this.propertyManager.getString("generator-settings", "");
-        long k = (new Random()).nextLong();
+        if (!NameReferencingFileConverter.a(this.propertyManager)) {
+            return false;
+        } else {
+            // this.a((PlayerList) (new DedicatedPlayerList(this))); // CraftBukkit - moved up
+            this.convertable = new WorldLoaderServer(server.getWorldContainer()); // CraftBukkit - moved from MinecraftServer constructor
+            long j = System.nanoTime();
 
-        if (s.length() > 0) {
-            try {
-                long l = Long.parseLong(s);
-
-                if (l != 0L) {
-                    k = l;
-                }
-            } catch (NumberFormatException numberformatexception) {
-                k = (long) s.hashCode();
+            if (this.O() == null) {
+                this.k(this.propertyManager.getString("level-name", "world"));
             }
+
+            String s = this.propertyManager.getString("level-seed", "");
+            String s1 = this.propertyManager.getString("level-type", "DEFAULT");
+            String s2 = this.propertyManager.getString("generator-settings", "");
+            long k = (new Random()).nextLong();
+
+            if (s.length() > 0) {
+                try {
+                    long l = Long.parseLong(s);
+
+                    if (l != 0L) {
+                        k = l;
+                    }
+                } catch (NumberFormatException numberformatexception) {
+                    k = (long) s.hashCode();
+                }
+            }
+
+            WorldType worldtype = WorldType.getType(s1);
+
+            if (worldtype == null) {
+                worldtype = WorldType.NORMAL;
+            }
+
+            this.at();
+            this.getEnableCommandBlock();
+            this.l();
+            this.getSnooperEnabled();
+            this.c(this.propertyManager.getInt("max-build-height", 256));
+            this.c((this.getMaxBuildHeight() + 8) / 16 * 16);
+            this.c(MathHelper.a(this.getMaxBuildHeight(), 64, 256));
+            this.propertyManager.a("max-build-height", Integer.valueOf(this.getMaxBuildHeight()));
+            i.info("Preparing level \"" + this.O() + "\"");
+            this.a(this.O(), this.O(), k, worldtype, s2);
+            long i1 = System.nanoTime() - j;
+            String s3 = String.format("%.3fs", new Object[] { Double.valueOf((double) i1 / 1.0E9D)});
+
+            i.info("Done (" + s3 + ")! For help, type \"help\" or \"?\"");
+            if (this.propertyManager.getBoolean("enable-query", false)) {
+                i.info("Starting GS4 status listener");
+                this.k = new RemoteStatusListener(this);
+                this.k.a();
+            }
+
+            if (this.propertyManager.getBoolean("enable-rcon", false)) {
+                i.info("Starting remote control listener");
+                this.l = new RemoteControlListener(this);
+                this.l.a();
+                this.remoteConsole = new org.bukkit.craftbukkit.command.CraftRemoteConsoleCommandSender(); // CraftBukkit
+            }
+
+            // CraftBukkit start
+            if (this.server.getBukkitSpawnRadius() > -1) {
+                i.info("'settings.spawn-radius' in bukkit.yml has been moved to 'spawn-protection' in server.properties. I will move your config for you.");
+                this.propertyManager.properties.remove("spawn-protection");
+                this.propertyManager.getInt("spawn-protection", this.server.getBukkitSpawnRadius());
+                this.server.removeBukkitSpawnRadius();
+                this.propertyManager.savePropertiesFile();
+            }
+            // CraftBukkit end
+
+            return true;
         }
-
-        WorldType worldtype = WorldType.getType(s1);
-
-        if (worldtype == null) {
-            worldtype = WorldType.NORMAL;
-        }
-
-        this.as();
-        this.getEnableCommandBlock();
-        this.l();
-        this.getSnooperEnabled();
-        this.c(this.propertyManager.getInt("max-build-height", 256));
-        this.c((this.getMaxBuildHeight() + 8) / 16 * 16);
-        this.c(MathHelper.a(this.getMaxBuildHeight(), 64, 256));
-        this.propertyManager.a("max-build-height", Integer.valueOf(this.getMaxBuildHeight()));
-        h.info("Preparing level \"" + this.M() + "\"");
-        this.a(this.N(), this.N(), k, worldtype, s2);
-        long i1 = System.nanoTime() - j;
-        String s3 = String.format("%.3fs", new Object[] { Double.valueOf((double) i1 / 1.0E9D)});
-
-        h.info("Done (" + s3 + ")! For help, type \"help\" or \"?\"");
-        if (this.propertyManager.getBoolean("enable-query", false)) {
-            h.info("Starting GS4 status listener");
-            this.j = new RemoteStatusListener(this);
-            this.j.a();
-        }
-
-        if (this.propertyManager.getBoolean("enable-rcon", false)) {
-            h.info("Starting remote control listener");
-            this.k = new RemoteControlListener(this);
-            this.k.a();
-            this.remoteConsole = new org.bukkit.craftbukkit.command.CraftRemoteConsoleCommandSender(); // CraftBukkit
-        }
-
-        // CraftBukkit start
-        if (this.server.getBukkitSpawnRadius() > -1) {
-            h.info("'settings.spawn-radius' in bukkit.yml has been moved to 'spawn-protection' in server.properties. I will move your config for you.");
-            this.propertyManager.properties.remove("spawn-protection");
-            this.propertyManager.getInt("spawn-protection", this.server.getBukkitSpawnRadius());
-            this.server.removeBukkitSpawnRadius();
-            this.propertyManager.savePropertiesFile();
-        }
-
-        return true;
     }
 
+    // CraftBukkit start
     public PropertyManager getPropertyManager() {
         return this.propertyManager;
     }
@@ -212,7 +222,7 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
     }
 
     public EnumGamemode getGamemode() {
-        return this.n;
+        return this.o;
     }
 
     public EnumDifficulty getDifficulty() {
@@ -225,7 +235,7 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
 
     protected void a(CrashReport crashreport) {
         while (this.isRunning()) {
-            this.ax();
+            this.aB();
 
             try {
                 Thread.sleep(10L);
@@ -246,9 +256,9 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         System.exit(0);
     }
 
-    public void v() { // CraftBukkit - protected -> public
+    public void v() { // CraftBukkit - protected -> public (decompile error?)
         super.v();
-        this.ax();
+        this.aB();
     }
 
     public boolean getAllowNether() {
@@ -260,8 +270,8 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
     }
 
     public void a(MojangStatisticsGenerator mojangstatisticsgenerator) {
-        mojangstatisticsgenerator.a("whitelist_enabled", Boolean.valueOf(this.ay().getHasWhitelist()));
-        mojangstatisticsgenerator.a("whitelist_count", Integer.valueOf(this.ay().getWhitelisted().size()));
+        mojangstatisticsgenerator.a("whitelist_enabled", Boolean.valueOf(this.aC().getHasWhitelist()));
+        mojangstatisticsgenerator.a("whitelist_count", Integer.valueOf(this.aC().getWhitelisted().length));
         super.a(mojangstatisticsgenerator);
     }
 
@@ -270,12 +280,12 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
     }
 
     public void issueCommand(String s, ICommandListener icommandlistener) {
-        this.i.add(new ServerCommand(s, icommandlistener));
+        this.j.add(new ServerCommand(s, icommandlistener));
     }
 
-    public void ax() {
-        while (!this.i.isEmpty()) {
-            ServerCommand servercommand = (ServerCommand) this.i.remove(0);
+    public void aB() {
+        while (!this.j.isEmpty()) {
+            ServerCommand servercommand = (ServerCommand) this.j.remove(0);
 
             // CraftBukkit start - ServerCommand for preprocessing
             ServerCommandEvent event = new ServerCommandEvent(this.console, servercommand.command);
@@ -288,11 +298,11 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         }
     }
 
-    public boolean W() {
+    public boolean X() {
         return true;
     }
 
-    public DedicatedPlayerList ay() {
+    public DedicatedPlayerList aC() {
         return (DedicatedPlayerList) super.getPlayerList();
     }
 
@@ -322,13 +332,13 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         return file1 != null ? file1.getAbsolutePath() : "No settings file";
     }
 
-    public void az() {
+    public void aD() {
         ServerGUI.a(this);
-        this.o = true;
+        this.p = true;
     }
 
-    public boolean aj() {
-        return this.o;
+    public boolean ak() {
+        return this.p;
     }
 
     public String a(EnumGamemode enumgamemode, boolean flag) {
@@ -346,9 +356,9 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
     public boolean a(World world, int i, int j, int k, EntityHuman entityhuman) {
         if (world.worldProvider.dimension != 0) {
             return false;
-        } else if (this.ay().getOPs().isEmpty()) {
+        } else if (this.aC().getOPs().d()) {
             return false;
-        } else if (this.ay().isOp(entityhuman.getName())) {
+        } else if (this.aC().isOp(entityhuman.getProfile())) {
             return false;
         } else if (this.getSpawnProtection() <= 0) {
             return false;
@@ -376,14 +386,89 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
         return this.propertyManager.getBoolean("broadcast-rcon-to-ops", true);
     }
 
-    public boolean as() {
+    public boolean at() {
         return this.propertyManager.getBoolean("announce-player-achievements", true);
     }
-    public PlayerList getPlayerList() {
-        return this.ay();
+
+    protected boolean aE() {
+        boolean flag = false;
+
+        int i;
+
+        for (i = 0; !flag && i <= 2; ++i) {
+            if (i > 0) {
+                // CraftBukkit - Fix decompiler stomping on field
+                DedicatedServer.i.warn("Encountered a problem while converting the user banlist, retrying in a few seconds");
+                this.aG();
+            }
+
+            flag = NameReferencingFileConverter.a((MinecraftServer) this);
+        }
+
+        boolean flag1 = false;
+
+        for (i = 0; !flag1 && i <= 2; ++i) {
+            if (i > 0) {
+                // CraftBukkit - Fix decompiler stomping on field
+                DedicatedServer.i.warn("Encountered a problem while converting the ip banlist, retrying in a few seconds");
+                this.aG();
+            }
+
+            flag1 = NameReferencingFileConverter.b((MinecraftServer) this);
+        }
+
+        boolean flag2 = false;
+
+        for (i = 0; !flag2 && i <= 2; ++i) {
+            if (i > 0) {
+                // CraftBukkit - Fix decompiler stomping on field
+                DedicatedServer.i.warn("Encountered a problem while converting the op list, retrying in a few seconds");
+                this.aG();
+            }
+
+            flag2 = NameReferencingFileConverter.c((MinecraftServer) this);
+        }
+
+        boolean flag3 = false;
+
+        for (i = 0; !flag3 && i <= 2; ++i) {
+            if (i > 0) {
+                // CraftBukkit - Fix decompiler stomping on field
+                DedicatedServer.i.warn("Encountered a problem while converting the whitelist, retrying in a few seconds");
+                this.aG();
+            }
+
+            flag3 = NameReferencingFileConverter.d((MinecraftServer) this);
+        }
+
+        boolean flag4 = false;
+
+        for (i = 0; !flag4 && i <= 2; ++i) {
+            if (i > 0) {
+                // CraftBukkit - Fix decompiler stomping on field
+                DedicatedServer.i.warn("Encountered a problem while converting the player save files, retrying in a few seconds");
+                this.aG();
+            }
+
+            flag4 = NameReferencingFileConverter.a(this, this.propertyManager);
+        }
+
+        return flag || flag1 || flag2 || flag3 || flag4;
     }
 
-    static Logger aA() {
-        return h;
+    private void aG() {
+        try {
+            Thread.sleep(5000L);
+        } catch (InterruptedException interruptedexception) {
+            ;
+        }
+    }
+
+    public PlayerList getPlayerList() {
+        return this.aC();
+    }
+
+    static Logger aF() {
+        return i;
     }
 }

src/main/java/net/minecraft/server/EntityArrow.java

@@ -280,7 +280,7 @@ public class EntityArrow extends Entity implements IProjectile {
                     this.d = movingobjectposition.b;
                     this.e = movingobjectposition.c;
                     this.f = movingobjectposition.d;
-                    this.g = this.world.getType(d, e, f); // CraftBukkit - Get correct block for storage
+                    this.g = this.world.getType(this.d, this.e, this.f);
                     this.h = this.world.getData(this.d, this.e, this.f);
                     this.motX = (double) ((float) (movingobjectposition.pos.a - this.locX));
                     this.motY = (double) ((float) (movingobjectposition.pos.b - this.locY));

src/main/java/net/minecraft/server/EntityChicken.java

@@ -59,7 +59,7 @@ public class EntityChicken extends EntityAnimal {
         }
 
         this.bp += this.bt * 2.0F;
-        if (!this.isBaby() && !this.world.isStatic && --this.bu <= 0) {
+        if (!this.world.isStatic && !this.isBaby() && !this.bZ() && --this.bu <= 0) {
             this.makeSound("mob.chicken.plop", 1.0F, (this.random.nextFloat() - this.random.nextFloat()) * 0.2F + 1.0F);
             this.a(Items.EGG, 1);
             this.bu = this.random.nextInt(6000) + 6000;

src/main/java/net/minecraft/server/EntityHorse.java

@@ -137,11 +137,11 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         return this.cb();
     }
 
-    public String getOwnerName() {
+    public String getOwnerUUID() {
         return this.datawatcher.getString(21);
     }
 
-    public void setOwnerName(String s) {
+    public void setOwnerUUID(String s) {
         this.datawatcher.watch(21, s);
     }
 
@@ -875,7 +875,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
     }
 
     public boolean h(EntityHuman entityhuman) {
-        this.setOwnerName(entityhuman.getName());
+        this.setOwnerUUID(entityhuman.getUniqueID().toString());
         this.setTame(true);
         return true;
     }
@@ -958,7 +958,7 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         nbttagcompound.setInt("Variant", this.getVariant());
         nbttagcompound.setInt("Temper", this.getTemper());
         nbttagcompound.setBoolean("Tame", this.isTame());
-        nbttagcompound.setString("OwnerName", this.getOwnerName());
+        nbttagcompound.setString("OwnerUUID", this.getOwnerUUID());
         nbttagcompound.setInt("Bukkit.MaxDomestication", this.maxDomestication); // CraftBukkit
         if (this.hasChest()) {
             NBTTagList nbttaglist = new NBTTagList();
@@ -997,8 +997,8 @@ public class EntityHorse extends EntityAnimal implements IInventoryListener {
         this.setVariant(nbttagcompound.getInt("Variant"));
         this.setTemper(nbttagcompound.getInt("Temper"));
         this.setTame(nbttagcompound.getBoolean("Tame"));
-        if (nbttagcompound.hasKeyOfType("OwnerName", 8)) {
-            this.setOwnerName(nbttagcompound.getString("OwnerName"));
+        if (nbttagcompound.hasKeyOfType("OwnerUUID", 8)) {
+            this.setOwnerUUID(nbttagcompound.getString("OwnerUUID"));
         }
         // CraftBukkit start
         if (nbttagcompound.hasKey("Bukkit.MaxDomestication")) {

src/main/java/net/minecraft/server/EntityHuman.java

@@ -1563,7 +1563,7 @@ public abstract class EntityHuman extends EntityLiving implements ICommandListen
     }
 
     public static UUID a(GameProfile gameprofile) {
-        UUID uuid = UtilUUID.b(gameprofile.getId());
+        UUID uuid = gameprofile.getId();
 
         if (uuid == null) {
             uuid = UUID.nameUUIDFromBytes(("OfflinePlayer:" + gameprofile.getName()).getBytes(Charsets.UTF_8));

src/main/java/net/minecraft/server/EntityInsentient.java

@@ -804,7 +804,7 @@ public abstract class EntityInsentient extends EntityLiving {
                     return true;
                 }
 
-                if (entityhuman.getName().equalsIgnoreCase(((EntityTameableAnimal) this).getOwnerName())) {
+                if (((EntityTameableAnimal) this).e(entityhuman)) {
                     // CraftBukkit start - fire PlayerLeashEntityEvent
                     if (CraftEventFactory.callPlayerLeashEntityEvent(this, entityhuman, entityhuman).isCancelled()) {
                         ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutAttachEntity(1, this, this.getLeashHolder()));

src/main/java/net/minecraft/server/EntityOcelot.java

@@ -114,7 +114,7 @@ public class EntityOcelot extends EntityTameableAnimal {
         ItemStack itemstack = entityhuman.inventory.getItemInHand();
 
         if (this.isTamed()) {
-            if (entityhuman.getName().equalsIgnoreCase(this.getOwnerName()) && !this.world.isStatic && !this.c(itemstack)) {
+            if (this.e(entityhuman) && !this.world.isStatic && !this.c(itemstack)) {
                 this.bp.setSitting(!this.isSitting());
             }
         } else if (this.bq.f() && itemstack != null && itemstack.getItem() == Items.RAW_FISH && entityhuman.f(this) < 9.0D) {
@@ -131,7 +131,7 @@ public class EntityOcelot extends EntityTameableAnimal {
                 if (this.random.nextInt(3) == 0 && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityTameEvent(this, entityhuman).isCancelled()) {
                     this.setTamed(true);
                     this.setCatType(1 + this.world.random.nextInt(3));
-                    this.setOwnerName(entityhuman.getName());
+                    this.setOwnerUUID(entityhuman.getUniqueID().toString());
                     this.i(true);
                     this.bp.setSitting(true);
                     this.world.broadcastEntityEffect(this, (byte) 7);
@@ -151,7 +151,7 @@ public class EntityOcelot extends EntityTameableAnimal {
         EntityOcelot entityocelot = new EntityOcelot(this.world);
 
         if (this.isTamed()) {
-            entityocelot.setOwnerName(this.getOwnerName());
+            entityocelot.setOwnerUUID(this.getOwnerUUID());
             entityocelot.setTamed(true);
             entityocelot.setCatType(this.getCatType());
         }

src/main/java/net/minecraft/server/EntityPlayer.java

@@ -82,7 +82,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
         }
 
         this.server = minecraftserver;
-        this.bO = minecraftserver.getPlayerList().i(this.getName());
+        this.bO = minecraftserver.getPlayerList().a((EntityHuman) this);
         this.W = 0.0F;
         this.height = 0.0F;
         this.setPositionRotation((double) i + 0.5D, (double) k, (double) j + 0.5D, 0.0F, 0.0F);
@@ -235,7 +235,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
             }
         }
 
-        if (this.bX > 0L && this.server.getIdleTimeout() > 0 && MinecraftServer.aq() - this.bX > (long) (this.server.getIdleTimeout() * 1000 * 60)) {
+        if (this.bX > 0L && this.server.getIdleTimeout() > 0 && MinecraftServer.ar() - this.bX > (long) (this.server.getIdleTimeout() * 1000 * 60)) {
             this.playerConnection.disconnect("You have been idle for too long!");
         }
     }
@@ -428,7 +428,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
             return false;
         } else {
             // CraftBukkit - this.server.getPvP() -> this.world.pvpMode
-            boolean flag = this.server.W() && this.world.pvpMode && "fall".equals(damagesource.translationIndex);
+            boolean flag = this.server.X() && this.world.pvpMode && "fall".equals(damagesource.translationIndex);
 
             if (!flag && this.invulnerableTicks > 0 && damagesource != DamageSource.OUT_OF_WORLD) {
                 return false;
@@ -923,7 +923,19 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     }
 
     public boolean a(int i, String s) {
-        return "seed".equals(s) && !this.server.W() ? true : (!"tell".equals(s) && !"help".equals(s) && !"me".equals(s) ? (this.server.getPlayerList().isOp(this.getName()) ? this.server.l() >= i : false) : true);
+        if ("seed".equals(s) && !this.server.X()) {
+            return true;
+        } else if (!"tell".equals(s) && !"help".equals(s) && !"me".equals(s)) {
+            if (this.server.getPlayerList().isOp(this.getProfile())) {
+                OpListEntry oplistentry = (OpListEntry) this.server.getPlayerList().getOPs().get(this.getProfile());
+
+                return oplistentry != null ? oplistentry.a() >= i : this.server.l() >= i;
+            } else {
+                return false;
+            }
+        } else {
+            return true;
+        }
     }
 
     public String s() {
@@ -944,7 +956,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
 
         this.bV = packetplayinsettings.e();
         this.bW = packetplayinsettings.f();
-        if (this.server.M() && this.server.L().equals(this.getName())) {
+        if (this.server.N() && this.server.M().equals(this.getName())) {
             this.server.a(packetplayinsettings.g());
         }
 
@@ -964,7 +976,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     }
 
     public void v() {
-        this.bX = MinecraftServer.aq();
+        this.bX = MinecraftServer.ar();
     }
 
     public ServerStatisticManager getStatisticManager() {

src/main/java/net/minecraft/server/EntityTracker.java

@@ -19,7 +19,7 @@ public class EntityTracker {
 
     public EntityTracker(WorldServer worldserver) {
         this.world = worldserver;
-        this.e = worldserver.getMinecraftServer().getPlayerList().a();
+        this.e = worldserver.getMinecraftServer().getPlayerList().d();
     }
 
     public void track(Entity entity) {

src/main/java/net/minecraft/server/EntityWolf.java

@@ -231,7 +231,7 @@ public class EntityWolf extends EntityTameableAnimal {
                 }
             }
 
-            if (entityhuman.getName().equalsIgnoreCase(this.getOwnerName()) && !this.world.isStatic && !this.c(itemstack)) {
+            if (this.e(entityhuman) && !this.world.isStatic && !this.c(itemstack)) {
                 this.bp.setSitting(!this.isSitting());
                 this.bc = false;
                 this.setPathEntity((PathEntity) null);
@@ -255,7 +255,7 @@ public class EntityWolf extends EntityTameableAnimal {
                     this.setGoalTarget((EntityLiving) null);
                     this.bp.setSitting(true);
                     this.setHealth(this.getMaxHealth()); // CraftBukkit - 20.0 -> getMaxHealth()
-                    this.setOwnerName(entityhuman.getName());
+                    this.setOwnerUUID(entityhuman.getUniqueID().toString());
                     this.i(true);
                     this.world.broadcastEntityEffect(this, (byte) 7);
                 } else {
@@ -302,10 +302,10 @@ public class EntityWolf extends EntityTameableAnimal {
 
     public EntityWolf b(EntityAgeable entityageable) {
         EntityWolf entitywolf = new EntityWolf(this.world);
-        String s = this.getOwnerName();
+        String s = this.getOwnerUUID();
 
         if (s != null && s.trim().length() > 0) {
-            entitywolf.setOwnerName(s);
+            entitywolf.setOwnerUUID(s);
             entitywolf.setTamed(true);
         }
 

src/main/java/net/minecraft/server/EntityZombie.java

@@ -327,7 +327,7 @@ public class EntityZombie extends EntityMonster {
     public void a(EntityLiving entityliving) {
         super.a(entityliving);
         if ((this.world.difficulty == EnumDifficulty.NORMAL || this.world.difficulty == EnumDifficulty.HARD) && entityliving instanceof EntityVillager) {
-            if (this.random.nextBoolean()) {
+            if (this.world.difficulty != EnumDifficulty.HARD && this.random.nextBoolean()) {
                 return;
             }
 

src/main/java/net/minecraft/server/ExpirableListEntry.java

@@ -0,0 +1,79 @@
+package net.minecraft.server;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import net.minecraft.util.com.google.gson.JsonObject;
+
+public abstract class ExpirableListEntry extends JsonListEntry {
+
+    public static final SimpleDateFormat a = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z");
+    protected final Date b;
+    protected final String c;
+    protected final Date d;
+    protected final String e;
+
+    public ExpirableListEntry(Object object, Date date, String s, Date date1, String s1) {
+        super(object);
+        this.b = date == null ? new Date() : date;
+        this.c = s == null ? "(Unknown)" : s;
+        this.d = date1;
+        this.e = s1 == null ? "Banned by an operator." : s1;
+    }
+
+    protected ExpirableListEntry(Object object, JsonObject jsonobject) {
+        super(object, jsonobject);
+
+        Date date;
+
+        try {
+            date = jsonobject.has("created") ? a.parse(jsonobject.get("created").getAsString()) : new Date();
+        } catch (ParseException parseexception) {
+            date = new Date();
+        }
+
+        this.b = date;
+        this.c = jsonobject.has("source") ? jsonobject.get("source").getAsString() : "(Unknown)";
+
+        Date date1;
+
+        try {
+            date1 = jsonobject.has("expires") ? a.parse(jsonobject.get("expires").getAsString()) : null;
+        } catch (ParseException parseexception1) {
+            date1 = null;
+        }
+
+        this.d = date1;
+        this.e = jsonobject.has("reason") ? jsonobject.get("reason").getAsString() : "Banned by an operator.";
+    }
+
+    public Date getExpires() {
+        return this.d;
+    }
+
+    public String getReason() {
+        return this.e;
+    }
+
+    boolean e() {
+        return this.d == null ? false : this.d.before(new Date());
+    }
+
+    protected void a(JsonObject jsonobject) {
+        jsonobject.addProperty("created", a.format(this.b));
+        jsonobject.addProperty("source", this.c);
+        jsonobject.addProperty("expires", this.d == null ? "forever" : a.format(this.d));
+        jsonobject.addProperty("reason", this.e);
+    }
+
+    // CraftBukkit start
+    public String getSource() {
+        return this.c;
+    }
+
+    public Date getCreated() {
+        return this.b;
+    }
+    // CraftBukkit end
+}

src/main/java/net/minecraft/server/FileConversionException.java

@@ -0,0 +1,22 @@
+package net.minecraft.server;
+
+// CraftBukkit - Imported because it's package private
+
+class FileConversionException extends RuntimeException {
+
+    private FileConversionException(String s, Throwable throwable) {
+        super(s, throwable);
+    }
+
+    private FileConversionException(String s) {
+        super(s);
+    }
+
+    FileConversionException(String s, PredicateEmptyList predicateemptylist) {
+        this(s);
+    }
+
+    FileConversionException(String s, Throwable throwable, PredicateEmptyList predicateemptylist) {
+        this(s, throwable);
+    }
+}

src/main/java/net/minecraft/server/HandshakeListener.java

@@ -63,12 +63,12 @@ public class HandshakeListener implements PacketHandshakingInListener {
             }
             // CraftBukkit end
 
-            if (packethandshakinginsetprotocol.d() > 4) {
-                chatcomponenttext = new ChatComponentText("Outdated server! I\'m still on 1.7.5");
+            if (packethandshakinginsetprotocol.d() > 5) {
+                chatcomponenttext = new ChatComponentText("Outdated server! I\'m still on 1.7.8");
                 this.b.handle(new PacketLoginOutDisconnect(chatcomponenttext), new GenericFutureListener[0]);
                 this.b.close(chatcomponenttext);
-            } else if (packethandshakinginsetprotocol.d() < 4) {
-                chatcomponenttext = new ChatComponentText("Outdated client! Please use 1.7.5");
+            } else if (packethandshakinginsetprotocol.d() < 5) {
+                chatcomponenttext = new ChatComponentText("Outdated client! Please use 1.7.8");
                 this.b.handle(new PacketLoginOutDisconnect(chatcomponenttext), new GenericFutureListener[0]);
                 this.b.close(chatcomponenttext);
             } else {

src/main/java/net/minecraft/server/ItemSkull.java

@@ -1,5 +1,9 @@
 package net.minecraft.server;
 
+import java.util.UUID;
+
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+
 public class ItemSkull extends Item {
 
     private static final String[] b = new String[] { "skeleton", "wither", "zombie", "char", "creeper"};
@@ -38,11 +42,7 @@ public class ItemSkull extends Item {
                 ++i;
             }
 
-            if (!entityhuman.a(i, j, k, l, itemstack)) {
-                return false;
-            } else if (!Blocks.SKULL.canPlace(world, i, j, k)) {
-                return false;
-            } else {
+            if (!world.isStatic) {
                 // CraftBukkit start - Handle in ItemBlock
                 // world.setTypeAndData(i, j, k, Blocks.SKULL, l, 2);
                 if (!ItemBlock.processBlockPlace(world, entityhuman, null, i, j, k, Blocks.SKULL, l, clickedX, clickedY, clickedZ)) {
@@ -59,20 +59,32 @@ public class ItemSkull extends Item {
                 TileEntity tileentity = world.getTileEntity(i, j, k);
 
                 if (tileentity != null && tileentity instanceof TileEntitySkull) {
-                    String s = "";
+                    if (itemstack.getData() == 3) {
+                        GameProfile gameprofile = null;
 
-                    if (itemstack.hasTag() && itemstack.getTag().hasKeyOfType("SkullOwner", 8)) {
-                        s = itemstack.getTag().getString("SkullOwner");
+                        if (itemstack.hasTag()) {
+                            NBTTagCompound nbttagcompound = itemstack.getTag();
+
+                            if (nbttagcompound.hasKeyOfType("SkullOwner", 10)) {
+                                gameprofile = GameProfileSerializer.a(nbttagcompound.getCompound("SkullOwner"));
+                            } else if (nbttagcompound.hasKeyOfType("SkullOwner", 8) && nbttagcompound.getString("SkullOwner").length() > 0) {
+                                gameprofile = new GameProfile((UUID) null, nbttagcompound.getString("SkullOwner"));
+                            }
+                        }
+
+                        ((TileEntitySkull) tileentity).setGameProfile(gameprofile);
+                    } else {
+                        ((TileEntitySkull) tileentity).setSkullType(itemstack.getData());
                     }
 
-                    ((TileEntitySkull) tileentity).setSkullType(itemstack.getData(), s);
                     ((TileEntitySkull) tileentity).setRotation(i1);
                     ((BlockSkull) Blocks.SKULL).a(world, i, j, k, (TileEntitySkull) tileentity);
                 }
 
                 --itemstack.count;
-                return true;
             }
+
+            return true;
         }
     }
 
@@ -91,6 +103,16 @@ public class ItemSkull extends Item {
     }
 
     public String n(ItemStack itemstack) {
-        return itemstack.getData() == 3 && itemstack.hasTag() && itemstack.getTag().hasKeyOfType("SkullOwner", 8) ? LocaleI18n.get("item.skull.player.name", new Object[] { itemstack.getTag().getString("SkullOwner")}) : super.n(itemstack);
+        if (itemstack.getData() == 3 && itemstack.hasTag()) {
+            if (itemstack.getTag().hasKeyOfType("SkullOwner", 10)) {
+                return LocaleI18n.get("item.skull.player.name", new Object[] { GameProfileSerializer.a(itemstack.getTag().getCompound("SkullOwner")).getName()});
+            }
+
+            if (itemstack.getTag().hasKeyOfType("SkullOwner", 8)) {
+                return LocaleI18n.get("item.skull.player.name", new Object[] { itemstack.getTag().getString("SkullOwner")});
+            }
+        }
+
+        return super.n(itemstack);
     }
 }

src/main/java/net/minecraft/server/LoginListener.java

@@ -61,9 +61,7 @@ public class LoginListener implements PacketLoginInListener {
 
     public void c() {
         if (!this.i.isComplete()) {
-            UUID uuid = UUID.nameUUIDFromBytes(("OfflinePlayer:" + this.i.getName()).getBytes(Charsets.UTF_8));
-
-            this.i = new GameProfile(uuid.toString().replaceAll("-", ""), this.i.getName());
+            this.i = this.a(this.i);
         }
 
         // CraftBukkit start - fire PlayerLoginEvent
@@ -97,7 +95,7 @@ public class LoginListener implements PacketLoginInListener {
         this.i = packetlogininstart.c();
         if (this.server.getOnlineMode() && !this.networkManager.c()) {
             this.g = EnumProtocolState.KEY;
-            this.networkManager.handle(new PacketLoginOutEncryptionBegin(this.j, this.server.J().getPublic(), this.e), new GenericFutureListener[0]);
+            this.networkManager.handle(new PacketLoginOutEncryptionBegin(this.j, this.server.K().getPublic(), this.e), new GenericFutureListener[0]);
         } else {
             this.g = EnumProtocolState.READY_TO_ACCEPT;
         }
@@ -105,7 +103,7 @@ public class LoginListener implements PacketLoginInListener {
 
     public void a(PacketLoginInEncryptionBegin packetlogininencryptionbegin) {
         Validate.validState(this.g == EnumProtocolState.KEY, "Unexpected key packet", new Object[0]);
-        PrivateKey privatekey = this.server.J().getPrivate();
+        PrivateKey privatekey = this.server.K().getPrivate();
 
         if (!Arrays.equals(this.e, packetlogininencryptionbegin.b(privatekey))) {
             throw new IllegalStateException("Invalid nonce!");
@@ -117,15 +115,25 @@ public class LoginListener implements PacketLoginInListener {
         }
     }
 
-    static String a(LoginListener loginlistener) {
+    protected GameProfile a(GameProfile gameprofile) {
+        UUID uuid = UUID.nameUUIDFromBytes(("OfflinePlayer:" + gameprofile.getName()).getBytes(Charsets.UTF_8));
+
+        return new GameProfile(uuid, gameprofile.getName());
+    }
+
+    static GameProfile a(LoginListener loginlistener) {
+        return loginlistener.i;
+    }
+
+    static String b(LoginListener loginlistener) {
         return loginlistener.j;
     }
 
-    static MinecraftServer b(LoginListener loginlistener) {
+    static MinecraftServer c(LoginListener loginlistener) {
         return loginlistener.server;
     }
 
-    static SecretKey c(LoginListener loginlistener) {
+    static SecretKey d(LoginListener loginlistener) {
         return loginlistener.loginKey;
     }
 
@@ -133,10 +141,6 @@ public class LoginListener implements PacketLoginInListener {
         return loginlistener.i = gameprofile;
     }
 
-    static GameProfile d(LoginListener loginlistener) {
-        return loginlistener.i;
-    }
-
     static Logger e() {
         return c;
     }

src/main/java/net/minecraft/server/MinecraftServer.java

@@ -19,6 +19,7 @@ import javax.imageio.ImageIO;
 
 import net.minecraft.util.com.google.common.base.Charsets;
 import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.GameProfileRepository;
 import net.minecraft.util.com.mojang.authlib.minecraft.MinecraftSessionService;
 import net.minecraft.util.com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService;
 import net.minecraft.util.io.netty.buffer.ByteBuf;
@@ -43,51 +44,55 @@ import org.bukkit.event.world.WorldSaveEvent;
 
 public abstract class MinecraftServer implements ICommandListener, Runnable, IMojangStatistics {
 
-    private static final Logger h = LogManager.getLogger();
-    private static MinecraftServer i;
+    private static final Logger i = LogManager.getLogger();
+    private static final File a = new File("usercache.json");
+    private static MinecraftServer j;
     public Convertable convertable; // CraftBukkit - private final -> public
-    private final MojangStatisticsGenerator k = new MojangStatisticsGenerator("server", this, aq());
+    private final MojangStatisticsGenerator l = new MojangStatisticsGenerator("server", this, ar());
     public File universe; // CraftBukkit - private final -> public
-    private final List m = new ArrayList();
-    private final ICommandHandler n;
+    private final List n = new ArrayList();
+    private final ICommandHandler o;
     public final MethodProfiler methodProfiler = new MethodProfiler();
-    private final ServerConnection o;
-    private final ServerPing p = new ServerPing();
-    private final Random q = new Random();
+    private final ServerConnection p;
+    private final ServerPing q = new ServerPing();
+    private final Random r = new Random();
     private String serverIp;
-    private int s = -1;
+    private int t = -1;
     public WorldServer[] worldServer;
-    private PlayerList t;
+    private PlayerList u;
     private boolean isRunning = true;
     private boolean isStopped;
     private int ticks;
-    protected final Proxy c;
-    public String d;
-    public int e;
+    protected final Proxy d;
+    public String e;
+    public int f;
     private boolean onlineMode;
     private boolean spawnAnimals;
     private boolean spawnNPCs;
     private boolean pvpMode;
     private boolean allowFlight;
     private String motd;
-    private int D;
-    private int E = 0;
-    public final long[] f = new long[100];
-    public long[][] g;
-    private KeyPair F;
-    private String G;
+    private int E;
+    private int F = 0;
+    public final long[] g = new long[100];
+    public long[][] h;
+    private KeyPair G;
     private String H;
+    private String I;
     private boolean demoMode;
-    private boolean K;
     private boolean L;
-    private String M = "";
-    private boolean N;
-    private long O;
-    private String P;
-    private boolean Q;
+    private boolean M;
+    private String N = "";
+    private boolean O;
+    private long P;
+    private String Q;
     private boolean R;
-    private final MinecraftSessionService S;
-    private long T = 0L;
+    private boolean S;
+    private final YggdrasilAuthenticationService T;
+    private final MinecraftSessionService U;
+    private long V = 0L;
+    private final GameProfileRepository W;
+    private final UserCache X;
 
     // CraftBukkit start - add fields
     public List<WorldServer> worlds = new ArrayList<WorldServer>();
@@ -103,14 +108,16 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     // CraftBukkit end
 
     public MinecraftServer(OptionSet options, Proxy proxy) { // CraftBukkit - signature file -> OptionSet
-        i = this;
-        this.c = proxy;
+        this.X = new UserCache(this, a);
+        j = this;
+        this.d = proxy;
         // this.universe = file1; // CraftBukkit
-        this.o = new ServerConnection(this);
-        this.n = new CommandDispatcher();
+        this.p = new ServerConnection(this);
+        this.o = new CommandDispatcher();
         // this.convertable = new WorldLoaderServer(file1); // CraftBukkit - moved to DedicatedServer.init
-        this.S = (new YggdrasilAuthenticationService(proxy, UUID.randomUUID().toString())).createMinecraftSessionService();
-
+        this.T = new YggdrasilAuthenticationService(proxy, UUID.randomUUID().toString());
+        this.U = this.T.createMinecraftSessionService();
+        this.W = this.T.createProfileRepository();
         // CraftBukkit start
         this.options = options;
         // Try to see if we're actually running in a terminal, disable jline if not
@@ -131,7 +138,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 this.reader = new ConsoleReader(System.in, System.out);
                 this.reader.setExpandEvents(false);
             } catch (IOException ex) {
-                h.warn((String) null, ex);
+                i.warn((String) null, ex);
             }
         }
         Runtime.getRuntime().addShutdownHook(new org.bukkit.craftbukkit.util.ServerShutdownThread(this));
@@ -146,21 +153,21 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
 
     protected void a(String s) {
         if (this.getConvertable().isConvertable(s)) {
-            h.info("Converting map!");
+            i.info("Converting map!");
             this.b("menu.convertingLevel");
             this.getConvertable().convert(s, new ConvertProgressUpdater(this));
         }
     }
 
     protected synchronized void b(String s) {
-        this.P = s;
+        this.Q = s;
     }
 
     protected void a(String s, String s1, long i, WorldType worldtype, String s2) {
         this.a(s);
         this.b("menu.loadingLevel");
         this.worldServer = new WorldServer[3];
-        // this.g = new long[this.worldServer.length][100]; // CraftBukkit - Removed ticktime arrays
+        // this.h = new long[this.worldServer.length][100]; // CraftBukkit - Removed ticktime arrays
         // IDataManager idatamanager = this.convertable.a(s, true);
         // WorldData worlddata = idatamanager.getWorldData();
         /* CraftBukkit start - Removed worldsettings
@@ -173,7 +180,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             worldsettings = new WorldSettings(worlddata);
         }
 
-        if (this.K) {
+        if (this.L) {
             worldsettings.a();
         }
         // */
@@ -208,7 +215,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
 
             if (j == 0) {
                 IDataManager idatamanager = new ServerNBTManager(server.getWorldContainer(), s1, true);
-                if (this.Q()) {
+                if (this.R()) {
                     world = new DemoWorldServer(this, idatamanager, s1, dimension, this.methodProfiler);
                 } else {
                     // world =, b0 to dimension, added Environment and gen
@@ -222,31 +229,31 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 File oldWorld = new File(new File(s), dim);
 
                 if ((!newWorld.isDirectory()) && (oldWorld.isDirectory())) {
-                    h.info("---- Migration of old " + worldType + " folder required ----");
-                    h.info("Unfortunately due to the way that Minecraft implemented multiworld support in 1.6, Bukkit requires that you move your " + worldType + " folder to a new location in order to operate correctly.");
-                    h.info("We will move this folder for you, but it will mean that you need to move it back should you wish to stop using Bukkit in the future.");
-                    h.info("Attempting to move " + oldWorld + " to " + newWorld + "...");
+                    MinecraftServer.i.info("---- Migration of old " + worldType + " folder required ----");
+                    MinecraftServer.i.info("Unfortunately due to the way that Minecraft implemented multiworld support in 1.6, Bukkit requires that you move your " + worldType + " folder to a new location in order to operate correctly.");
+                    MinecraftServer.i.info("We will move this folder for you, but it will mean that you need to move it back should you wish to stop using Bukkit in the future.");
+                    MinecraftServer.i.info("Attempting to move " + oldWorld + " to " + newWorld + "...");
 
                     if (newWorld.exists()) {
-                        h.warn("A file or folder already exists at " + newWorld + "!");
-                        h.info("---- Migration of old " + worldType + " folder failed ----");
+                        MinecraftServer.i.warn("A file or folder already exists at " + newWorld + "!");
+                        MinecraftServer.i.info("---- Migration of old " + worldType + " folder failed ----");
                     } else if (newWorld.getParentFile().mkdirs()) {
                         if (oldWorld.renameTo(newWorld)) {
-                            h.info("Success! To restore " + worldType + " in the future, simply move " + newWorld + " to " + oldWorld);
+                            MinecraftServer.i.info("Success! To restore " + worldType + " in the future, simply move " + newWorld + " to " + oldWorld);
                             // Migrate world data too.
                             try {
                                 com.google.common.io.Files.copy(new File(new File(s), "level.dat"), new File(new File(name), "level.dat"));
                             } catch (IOException exception) {
-                                h.warn("Unable to migrate world data.");
+                                MinecraftServer.i.warn("Unable to migrate world data.");
                             }
-                            h.info("---- Migration of old " + worldType + " folder complete ----");
+                            MinecraftServer.i.info("---- Migration of old " + worldType + " folder complete ----");
                         } else {
-                            h.warn("Could not move folder " + oldWorld + " to " + newWorld + "!");
-                            h.info("---- Migration of old " + worldType + " folder failed ----");
+                            MinecraftServer.i.warn("Could not move folder " + oldWorld + " to " + newWorld + "!");
+                            MinecraftServer.i.info("---- Migration of old " + worldType + " folder failed ----");
                         }
                     } else {
-                        h.warn("Could not create path for " + newWorld + "!");
-                        h.info("---- Migration of old " + worldType + " folder failed ----");
+                        MinecraftServer.i.warn("Could not create path for " + newWorld + "!");
+                        MinecraftServer.i.info("---- Migration of old " + worldType + " folder failed ----");
                     }
                 }
 
@@ -262,12 +269,12 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             this.server.getPluginManager().callEvent(new org.bukkit.event.world.WorldInitEvent(world.getWorld()));
 
             world.addIWorldAccess(new WorldManager(this, world));
-            if (!this.M()) {
+            if (!this.N()) {
                 world.getWorldData().setGameType(this.getGamemode());
             }
 
             this.worlds.add(world);
-            this.t.setPlayerFileData(this.worlds.toArray(new WorldServer[this.worlds.size()]));
+            this.u.setPlayerFileData(this.worlds.toArray(new WorldServer[this.worlds.size()]));
             // CraftBukkit end
         }
 
@@ -288,18 +295,18 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         // CraftBukkit start - fire WorldLoadEvent and handle whether or not to keep the spawn in memory
         for (int m = 0; m < this.worlds.size(); ++m) {
             WorldServer worldserver = this.worlds.get(m);
-            h.info("Preparing start region for level " + m + " (Seed: " + worldserver.getSeed() + ")");
+            MinecraftServer.i.info("Preparing start region for level " + m + " (Seed: " + worldserver.getSeed() + ")");
             if (!worldserver.getWorld().getKeepSpawnInMemory()) {
                 continue;
             }
 
             ChunkCoordinates chunkcoordinates = worldserver.getSpawn();
-            long j = aq();
+            long j = ar();
             i = 0;
 
             for (int k = -192; k <= 192 && this.isRunning(); k += 16) {
                 for (int l = -192; l <= 192 && this.isRunning(); l += 16) {
-                    long i1 = aq();
+                    long i1 = ar();
 
                     if (i1 - j > 1000L) {
                         this.a_("Preparing spawn area", i * 100 / 625);
@@ -332,20 +339,21 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     public abstract boolean m();
 
     protected void a_(String s, int i) {
-        this.d = s;
-        this.e = i;
-        h.info(s + ": " + i + "%");
+        this.e = s;
+        this.f = i;
+        // CraftBukkit - Use FQN to work around decompiler issue
+        MinecraftServer.i.info(s + ": " + i + "%");
     }
 
     protected void n() {
-        this.d = null;
-        this.e = 0;
+        this.e = null;
+        this.f = 0;
 
         this.server.enablePlugins(org.bukkit.plugin.PluginLoadOrder.POSTWORLD); // CraftBukkit
     }
 
     protected void saveChunks(boolean flag) throws ExceptionWorldConflict { // CraftBukkit - added throws
-        if (!this.L) {
+        if (!this.M) {
             // CraftBukkit start - fire WorldSaveEvent
             // WorldServer[] aworldserver = this.worldServer;
             int i = this.worlds.size();
@@ -355,7 +363,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
 
                 if (worldserver != null) {
                     if (!flag) {
-                        h.info("Saving chunks for level \'" + worldserver.getWorldData().getName() + "\'/" + worldserver.worldProvider.getName());
+                        MinecraftServer.i.info("Saving chunks for level \'" + worldserver.getWorldData().getName() + "\'/" + worldserver.worldProvider.getName());
                     }
 
                     worldserver.save(true, (IProgressUpdate) null);
@@ -370,37 +378,39 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void stop() throws ExceptionWorldConflict { // CraftBukkit - added throws
-        if (!this.L) {
-            h.info("Stopping server");
+        if (!this.M) {
+            i.info("Stopping server");
             // CraftBukkit start
             if (this.server != null) {
                 this.server.disablePlugins();
             }
             // CraftBukkit end
 
-            if (this.ah() != null) {
-                this.ah().b();
+            if (this.ai() != null) {
+                this.ai().b();
             }
 
-            if (this.t != null) {
-                h.info("Saving players");
-                this.t.savePlayers();
-                this.t.r();
+            if (this.u != null) {
+                i.info("Saving players");
+                this.u.savePlayers();
+                this.u.u();
             }
 
-            h.info("Saving worlds");
-            this.saveChunks(false);
+            if (this.worldServer != null) {
+                i.info("Saving worlds");
+                this.saveChunks(false);
+            
+                /* CraftBukkit start - Handled in saveChunks
+                for (int i = 0; i < this.worldServer.length; ++i) {
+                    WorldServer worldserver = this.worldServer[i];
 
-            /* CraftBukkit start - Handled in saveChunks
-            for (int i = 0; i < this.worldServer.length; ++i) {
-                WorldServer worldserver = this.worldServer[i];
-
-                worldserver.saveLevel();
+                    worldserver.saveLevel();
+                }
+                // CraftBukkit end */
             }
-            // CraftBukkit end */
 
-            if (this.k.d()) {
-                this.k.e();
+            if (this.l.d()) {
+                this.l.e();
             }
         }
     }
@@ -424,26 +434,26 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     public void run() {
         try {
             if (this.init()) {
-                long i = aq();
+                long i = ar();
                 long j = 0L;
 
-                this.p.setMOTD(new ChatComponentText(this.motd));
-                this.p.setServerInfo(new ServerPingServerData("1.7.5", 4));
-                this.a(this.p);
+                this.q.setMOTD(new ChatComponentText(this.motd));
+                this.q.setServerInfo(new ServerPingServerData("1.7.8", 5));
+                this.a(this.q);
 
                 while (this.isRunning) {
-                    long k = aq();
+                    long k = ar();
                     long l = k - i;
 
-                    if (l > 2000L && i - this.O >= 15000L) {
+                    if (l > 2000L && i - this.P >= 15000L) {
                         if (this.server.getWarnOnOverload()) // CraftBukkit - Added option to suppress warning messages
-                        h.warn("Can\'t keep up! Did the system time change, or is the server overloaded? Running {}ms behind, skipping {} tick(s)", new Object[] { Long.valueOf(l), Long.valueOf(l / 50L)});
+                        MinecraftServer.i.warn("Can\'t keep up! Did the system time change, or is the server overloaded? Running {}ms behind, skipping {} tick(s)", new Object[] { Long.valueOf(l), Long.valueOf(l / 50L)});
                         l = 2000L;
-                        this.O = i;
+                        this.P = i;
                     }
 
                     if (l < 0L) {
-                        h.warn("Time ran backwards! Did the system time change?");
+                        MinecraftServer.i.warn("Time ran backwards! Did the system time change?");
                         l = 0L;
                     }
 
@@ -461,13 +471,13 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                     }
 
                     Thread.sleep(Math.max(1L,  50L - j));
-                    this.N = true;
+                    this.O = true;
                 }
             } else {
                 this.a((CrashReport) null);
             }
         } catch (Throwable throwable) {
-            h.error("Encountered an unexpected exception", throwable);
+            i.error("Encountered an unexpected exception", throwable);
             CrashReport crashreport = null;
 
             if (throwable instanceof ReportedException) {
@@ -479,9 +489,9 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             File file1 = new File(new File(this.s(), "crash-reports"), "crash-" + (new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss")).format(new Date()) + "-server.txt");
 
             if (crashreport.a(file1)) {
-                h.error("This crash report has been saved to: " + file1.getAbsolutePath());
+                i.error("This crash report has been saved to: " + file1.getAbsolutePath());
             } else {
-                h.error("We were unable to save this crash report to disk.");
+                i.error("We were unable to save this crash report to disk.");
             }
 
             this.a(crashreport);
@@ -490,7 +500,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 this.stop();
                 this.isStopped = true;
             } catch (Throwable throwable1) {
-                h.error("Exception stopping the server", throwable1);
+                i.error("Exception stopping the server", throwable1);
             } finally {
                 // CraftBukkit start - Restore terminal to original settings
                 try {
@@ -519,7 +529,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
 
                 serverping.setFavicon("data:image/png;base64," + bytebuf1.toString(Charsets.UTF_8));
             } catch (Exception exception) {
-                h.error("Couldn\'t load server icon", exception);
+                i.error("Couldn\'t load server icon", exception);
             } finally {
                 bytebuf.release();
             }
@@ -538,45 +548,45 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         long i = System.nanoTime();
 
         ++this.ticks;
-        if (this.Q) {
-            this.Q = false;
+        if (this.R) {
+            this.R = false;
             this.methodProfiler.a = true;
             this.methodProfiler.a();
         }
 
         this.methodProfiler.a("root");
         this.v();
-        if (i - this.T >= 5000000000L) {
-            this.T = i;
-            this.p.setPlayerSample(new ServerPingPlayerSample(this.D(), this.C()));
+        if (i - this.V >= 5000000000L) {
+            this.V = i;
+            this.q.setPlayerSample(new ServerPingPlayerSample(this.D(), this.C()));
             GameProfile[] agameprofile = new GameProfile[Math.min(this.C(), 12)];
-            int j = MathHelper.nextInt(this.q, 0, this.C() - agameprofile.length);
+            int j = MathHelper.nextInt(this.r, 0, this.C() - agameprofile.length);
 
             for (int k = 0; k < agameprofile.length; ++k) {
-                agameprofile[k] = ((EntityPlayer) this.t.players.get(j + k)).getProfile();
+                agameprofile[k] = ((EntityPlayer) this.u.players.get(j + k)).getProfile();
             }
 
             Collections.shuffle(Arrays.asList(agameprofile));
-            this.p.b().a(agameprofile);
+            this.q.b().a(agameprofile);
         }
 
         if ((this.autosavePeriod > 0) && ((this.ticks % this.autosavePeriod) == 0)) { // CraftBukkit
             this.methodProfiler.a("save");
-            this.t.savePlayers();
+            this.u.savePlayers();
             this.saveChunks(true);
             this.methodProfiler.b();
         }
 
         this.methodProfiler.a("tallying");
-        this.f[this.ticks % 100] = System.nanoTime() - i;
+        this.g[this.ticks % 100] = System.nanoTime() - i;
         this.methodProfiler.b();
         this.methodProfiler.a("snooper");
-        if (!this.k.d() && this.ticks > 100) {
-            this.k.a();
+        if (!this.l.d() && this.ticks > 100) {
+            this.l.a();
         }
 
         if (this.ticks % 6000 == 0) {
-            this.k.b();
+            this.l.b();
         }
 
         this.methodProfiler.b();
@@ -650,17 +660,17 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 this.methodProfiler.b();
             // } // CraftBukkit
 
-            // this.g[i][this.ticks % 100] = System.nanoTime() - j; // CraftBukkit
+            // this.h[i][this.ticks % 100] = System.nanoTime() - j; // CraftBukkit
         }
 
         this.methodProfiler.c("connection");
-        this.ah().c();
+        this.ai().c();
         this.methodProfiler.c("players");
-        this.t.tick();
+        this.u.tick();
         this.methodProfiler.c("tickables");
 
-        for (i = 0; i < this.m.size(); ++i) {
-            ((IUpdatePlayerListBox) this.m.get(i)).a();
+        for (i = 0; i < this.n.size(); ++i) {
+            ((IUpdatePlayerListBox) this.n.get(i)).a();
         }
 
         this.methodProfiler.b();
@@ -671,7 +681,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void a(IUpdatePlayerListBox iupdateplayerlistbox) {
-        this.m.add(iupdateplayerlistbox);
+        this.n.add(iupdateplayerlistbox);
     }
 
     public static void main(final OptionSet options) { // CraftBukkit - replaces main(String[] astring)
@@ -747,7 +757,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             }
 
             if (flag) {
-                dedicatedserver.az();
+                dedicatedserver.aD();
             }
             // */
 
@@ -772,7 +782,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             // Runtime.getRuntime().addShutdownHook(new ThreadShutdown("Server Shutdown Thread", dedicatedserver));
             // CraftBukkit end
         } catch (Exception exception) {
-            h.fatal("Failed to start the minecraft server", exception);
+            i.fatal("Failed to start the minecraft server", exception);
         }
     }
 
@@ -785,11 +795,11 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void info(String s) {
-        h.info(s);
+        i.info(s);
     }
 
     public void warning(String s) {
-        h.warn(s);
+        i.warn(s);
     }
 
     public WorldServer getWorldServer(int i) {
@@ -809,7 +819,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public int z() {
-        return this.s;
+        return this.t;
     }
 
     public String A() {
@@ -817,19 +827,23 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public String getVersion() {
-        return "1.7.5";
+        return "1.7.8";
     }
 
     public int C() {
-        return this.t.getPlayerCount();
+        return this.u.getPlayerCount();
     }
 
     public int D() {
-        return this.t.getMaxPlayers();
+        return this.u.getMaxPlayers();
     }
 
     public String[] getPlayers() {
-        return this.t.d();
+        return this.u.f();
+    }
+
+    public GameProfile[] F() {
+        return this.u.g();
     }
 
     public String getPlugins() {
@@ -871,7 +885,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 // Event changes end
                 ServerCommand servercommand = new ServerCommand(event.getCommand(), RemoteControlCommandListener.instance);
                 MinecraftServer.this.server.dispatchServerCommand(MinecraftServer.this.remoteConsole, servercommand); // CraftBukkit
-                // this.n.a(RemoteControlCommandListener.instance, s);
+                // this.o.a(RemoteControlCommandListener.instance, s);
                 return RemoteControlCommandListener.instance.f();
             }};
         processQueue.add(waitable);
@@ -891,12 +905,12 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void h(String s) {
-        h.error(s);
+        i.error(s);
     }
 
     public void i(String s) {
         if (this.isDebugging()) {
-            h.info(s);
+            i.info(s);
         }
     }
 
@@ -910,7 +924,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
             crashreport.g().a("Vec3 Pool Size", (Callable) (new CrashReportVec3DPoolSize(this)));
         }
 
-        if (this.t != null) {
+        if (this.u != null) {
             crashreport.g().a("Player Count", (Callable) (new CrashReportPlayerCount(this)));
         }
 
@@ -925,7 +939,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         if (s.startsWith("/")) {
             s = s.substring(1);
             boolean flag = !s.contains(" ");
-            List list = this.n.b(icommandlistener, s);
+            List list = this.o.b(icommandlistener, s);
 
             if (list != null) {
                 Iterator iterator = list.iterator();
@@ -945,7 +959,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         } else {
             String[] astring = s.split(" ", -1);
             String s2 = astring[astring.length - 1];
-            String[] astring1 = this.t.d();
+            String[] astring1 = this.u.f();
             int i = astring1.length;
 
             for (int j = 0; j < i; ++j) {
@@ -964,7 +978,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public static MinecraftServer getServer() {
-        return i;
+        return j;
     }
 
     public String getName() {
@@ -972,7 +986,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void sendMessage(IChatBaseComponent ichatbasecomponent) {
-        h.info(ichatbasecomponent.c());
+        i.info(ichatbasecomponent.c());
     }
 
     public boolean a(int i, String s) {
@@ -980,43 +994,43 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public ICommandHandler getCommandHandler() {
-        return this.n;
+        return this.o;
     }
 
-    public KeyPair J() {
-        return this.F;
-    }
-
-    public int K() {
-        return this.s;
-    }
-
-    public void setPort(int i) {
-        this.s = i;
-    }
-
-    public String L() {
+    public KeyPair K() {
         return this.G;
     }
 
-    public void j(String s) {
-        this.G = s;
+    public int L() {
+        return this.t;
     }
 
-    public boolean M() {
-        return this.G != null;
+    public void setPort(int i) {
+        this.t = i;
     }
 
-    public String N() {
+    public String M() {
         return this.H;
     }
 
-    public void k(String s) {
+    public void j(String s) {
         this.H = s;
     }
 
+    public boolean N() {
+        return this.H != null;
+    }
+
+    public String O() {
+        return this.I;
+    }
+
+    public void k(String s) {
+        this.I = s;
+    }
+
     public void a(KeyPair keypair) {
-        this.F = keypair;
+        this.G = keypair;
     }
 
     public void a(EnumDifficulty enumdifficulty) {
@@ -1029,7 +1043,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 if (worldserver.getWorldData().isHardcore()) {
                     worldserver.difficulty = EnumDifficulty.HARD;
                     worldserver.setSpawnFlags(true, true);
-                } else if (this.M()) {
+                } else if (this.N()) {
                     worldserver.difficulty = enumdifficulty;
                     worldserver.setSpawnFlags(worldserver.difficulty != EnumDifficulty.PEACEFUL, true);
                 } else {
@@ -1044,7 +1058,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         return true;
     }
 
-    public boolean Q() {
+    public boolean R() {
         return this.demoMode;
     }
 
@@ -1053,15 +1067,15 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void c(boolean flag) {
-        this.K = flag;
+        this.L = flag;
     }
 
     public Convertable getConvertable() {
         return this.convertable;
     }
 
-    public void T() {
-        this.L = true;
+    public void U() {
+        this.M = true;
         this.getConvertable().d();
 
         // CraftBukkit start
@@ -1079,11 +1093,11 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public String getResourcePack() {
-        return this.M;
+        return this.N;
     }
 
     public void setTexturePack(String s) {
-        this.M = s;
+        this.N = s;
     }
 
     public void a(MojangStatisticsGenerator mojangstatisticsgenerator) {
@@ -1091,11 +1105,11 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         mojangstatisticsgenerator.a("whitelist_count", Integer.valueOf(0));
         mojangstatisticsgenerator.a("players_current", Integer.valueOf(this.C()));
         mojangstatisticsgenerator.a("players_max", Integer.valueOf(this.D()));
-        mojangstatisticsgenerator.a("players_seen", Integer.valueOf(this.t.getSeenPlayers().length));
+        mojangstatisticsgenerator.a("players_seen", Integer.valueOf(this.u.getSeenPlayers().length));
         mojangstatisticsgenerator.a("uses_auth", Boolean.valueOf(this.onlineMode));
-        mojangstatisticsgenerator.a("gui_state", this.aj() ? "enabled" : "disabled");
-        mojangstatisticsgenerator.a("run_time", Long.valueOf((aq() - mojangstatisticsgenerator.g()) / 60L * 1000L));
-        mojangstatisticsgenerator.a("avg_tick_ms", Integer.valueOf((int) (MathHelper.a(this.f) * 1.0E-6D)));
+        mojangstatisticsgenerator.a("gui_state", this.ak() ? "enabled" : "disabled");
+        mojangstatisticsgenerator.a("run_time", Long.valueOf((ar() - mojangstatisticsgenerator.g()) / 60L * 1000L));
+        mojangstatisticsgenerator.a("avg_tick_ms", Integer.valueOf((int) (MathHelper.a(this.g) * 1.0E-6D)));
         int i = 0;
 
         // CraftBukkit start - use worlds list for iteration
@@ -1111,7 +1125,7 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
                 mojangstatisticsgenerator.a("world[" + i + "][hardcore]", Boolean.valueOf(worlddata.isHardcore()));
                 mojangstatisticsgenerator.a("world[" + i + "][generator_name]", worlddata.getType().name());
                 mojangstatisticsgenerator.a("world[" + i + "][generator_version]", Integer.valueOf(worlddata.getType().getVersion()));
-                mojangstatisticsgenerator.a("world[" + i + "][height]", Integer.valueOf(this.D));
+                mojangstatisticsgenerator.a("world[" + i + "][height]", Integer.valueOf(this.E));
                 mojangstatisticsgenerator.a("world[" + i + "][chunks_loaded]", Integer.valueOf(worldserver.L().getLoadedChunks()));
                 ++i;
             }
@@ -1121,17 +1135,17 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void b(MojangStatisticsGenerator mojangstatisticsgenerator) {
-        mojangstatisticsgenerator.b("singleplayer", Boolean.valueOf(this.M()));
+        mojangstatisticsgenerator.b("singleplayer", Boolean.valueOf(this.N()));
         mojangstatisticsgenerator.b("server_brand", this.getServerModName());
         mojangstatisticsgenerator.b("gui_supported", GraphicsEnvironment.isHeadless() ? "headless" : "supported");
-        mojangstatisticsgenerator.b("dedicated", Boolean.valueOf(this.W()));
+        mojangstatisticsgenerator.b("dedicated", Boolean.valueOf(this.X()));
     }
 
     public boolean getSnooperEnabled() {
         return true;
     }
 
-    public abstract boolean W();
+    public abstract boolean X();
 
     public boolean getOnlineMode() {
         return this.server.getOnlineMode(); // CraftBukkit
@@ -1184,11 +1198,11 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public int getMaxBuildHeight() {
-        return this.D;
+        return this.E;
     }
 
     public void c(int i) {
-        this.D = i;
+        this.E = i;
     }
 
     public boolean isStopped() {
@@ -1196,11 +1210,11 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public PlayerList getPlayerList() {
-        return this.t;
+        return this.u;
     }
 
     public void a(PlayerList playerlist) {
-        this.t = playerlist;
+        this.u = playerlist;
     }
 
     public void a(EnumGamemode enumgamemode) {
@@ -1211,22 +1225,22 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
         }
     }
 
-    public ServerConnection ah() {
-        return this.o;
+    public ServerConnection ai() {
+        return this.p;
     }
 
-    public boolean aj() {
+    public boolean ak() {
         return false;
     }
 
     public abstract String a(EnumGamemode enumgamemode, boolean flag);
 
-    public int ak() {
+    public int al() {
         return this.ticks;
     }
 
-    public void al() {
-        this.Q = true;
+    public void am() {
+        this.R = true;
     }
 
     public ChunkCoordinates getChunkCoordinates() {
@@ -1246,54 +1260,62 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
     }
 
     public void setForceGamemode(boolean flag) {
-        this.R = flag;
+        this.S = flag;
     }
 
     public boolean getForceGamemode() {
-        return this.R;
+        return this.S;
     }
 
-    public Proxy ap() {
-        return this.c;
+    public Proxy aq() {
+        return this.d;
     }
 
-    public static long aq() {
+    public static long ar() {
         return System.currentTimeMillis();
     }
 
     public int getIdleTimeout() {
-        return this.E;
+        return this.F;
     }
 
     public void setIdleTimeout(int i) {
-        this.E = i;
+        this.F = i;
     }
 
     public IChatBaseComponent getScoreboardDisplayName() {
         return new ChatComponentText(this.getName());
     }
 
-    public boolean as() {
+    public boolean at() {
         return true;
     }
 
-    public MinecraftSessionService at() {
-        return this.S;
+    public MinecraftSessionService av() {
+        return this.U;
     }
 
-    public ServerPing au() {
-        return this.p;
+    public GameProfileRepository getGameProfileRepository() {
+        return this.W;
     }
 
-    public void av() {
-        this.T = 0L;
+    public UserCache getUserCache() {
+        return this.X;
+    }
+
+    public ServerPing ay() {
+        return this.q;
+    }
+
+    public void az() {
+        this.V = 0L;
     }
 
     public static Logger getLogger() {
-        return h;
+        return i;
     }
 
     public static PlayerList a(MinecraftServer minecraftserver) {
-        return minecraftserver.t;
+        return minecraftserver.u;
     }
 }

src/main/java/net/minecraft/server/NameReferencingFileConverter.java

@@ -0,0 +1,410 @@
+package net.minecraft.server;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.UUID;
+
+import net.minecraft.util.com.google.common.base.Charsets;
+import net.minecraft.util.com.google.common.collect.Iterators;
+import net.minecraft.util.com.google.common.collect.Lists;
+import net.minecraft.util.com.google.common.collect.Maps;
+import net.minecraft.util.com.google.common.io.Files;
+import net.minecraft.util.com.mojang.authlib.Agent;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.ProfileLookupCallback;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+// CraftBukkit - Imported for package private static methods
+
+public class NameReferencingFileConverter {
+
+    private static final Logger e = LogManager.getLogger();
+    public static final File a = new File("banned-ips.txt");
+    public static final File b = new File("banned-players.txt");
+    public static final File c = new File("ops.txt");
+    public static final File d = new File("white-list.txt");
+
+    static List a(File file1, Map map) throws IOException { // CraftBukkit - Added throws
+        List list = Files.readLines(file1, Charsets.UTF_8);
+        Iterator iterator = list.iterator();
+
+        while (iterator.hasNext()) {
+            String s = (String) iterator.next();
+
+            s = s.trim();
+            if (!s.startsWith("#") && s.length() >= 1) {
+                String[] astring = s.split("\\|");
+
+                map.put(astring[0].toLowerCase(Locale.ROOT), astring);
+            }
+        }
+
+        return list;
+    }
+
+    private static void a(MinecraftServer minecraftserver, Collection collection, ProfileLookupCallback profilelookupcallback) {
+        String[] astring = (String[]) Iterators.toArray(Iterators.filter(collection.iterator(), new PredicateEmptyList()), String.class);
+
+        if (minecraftserver.getOnlineMode()) {
+            minecraftserver.getGameProfileRepository().findProfilesByNames(astring, Agent.MINECRAFT, profilelookupcallback);
+        } else {
+            String[] astring1 = astring;
+            int i = astring.length;
+
+            for (int j = 0; j < i; ++j) {
+                String s = astring1[j];
+                UUID uuid = EntityHuman.a(new GameProfile((UUID) null, s));
+                GameProfile gameprofile = new GameProfile(uuid, s);
+
+                profilelookupcallback.onProfileLookupSucceeded(gameprofile);
+            }
+        }
+    }
+
+    public static boolean a(MinecraftServer minecraftserver) {
+        GameProfileBanList gameprofilebanlist = new GameProfileBanList(PlayerList.a);
+
+        if (b.exists() && b.isFile()) {
+            if (gameprofilebanlist.c().exists()) {
+                /* CraftBukkit start - Exception is never thrown
+                try {
+                    gameprofilebanlist.load();
+                } catch (FileNotFoundException filenotfoundexception) {
+                    e.warn("Could not load existing file " + gameprofilebanlist.c().getName(), filenotfoundexception);
+                }
+                */
+                gameprofilebanlist.load();
+                // CraftBukkit end
+            }
+
+            try {
+                HashMap hashmap = Maps.newHashMap();
+
+                a(b, (Map) hashmap);
+                GameProfileBanListEntryConverter gameprofilebanlistentryconverter = new GameProfileBanListEntryConverter(minecraftserver, hashmap, gameprofilebanlist);
+
+                a(minecraftserver, hashmap.keySet(), gameprofilebanlistentryconverter);
+                gameprofilebanlist.save();
+                c(b);
+                return true;
+            } catch (IOException ioexception) {
+                e.warn("Could not read old user banlist to convert it!", ioexception);
+                return false;
+            } catch (FileConversionException fileconversionexception) {
+                e.error("Conversion failed, please try again later", fileconversionexception);
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
+
+    public static boolean b(MinecraftServer minecraftserver) {
+        IpBanList ipbanlist = new IpBanList(PlayerList.b);
+
+        if (a.exists() && a.isFile()) {
+            if (ipbanlist.c().exists()) {
+                /* CraftBukkit start - Exception is never thrown
+                try {
+                    ipbanlist.load();
+                } catch (FileNotFoundException filenotfoundexception) {
+                    e.warn("Could not load existing file " + ipbanlist.c().getName(), filenotfoundexception);
+                }
+                */
+                ipbanlist.load();
+                // CraftBukkit end
+            }
+
+            try {
+                HashMap hashmap = Maps.newHashMap();
+
+                a(a, (Map) hashmap);
+                Iterator iterator = hashmap.keySet().iterator();
+
+                while (iterator.hasNext()) {
+                    String s = (String) iterator.next();
+                    String[] astring = (String[]) hashmap.get(s);
+                    Date date = astring.length > 1 ? b(astring[1], (Date) null) : null;
+                    String s1 = astring.length > 2 ? astring[2] : null;
+                    Date date1 = astring.length > 3 ? b(astring[3], (Date) null) : null;
+                    String s2 = astring.length > 4 ? astring[4] : null;
+
+                    ipbanlist.add(new IpBanEntry(s, date, s1, date1, s2));
+                }
+
+                ipbanlist.save();
+                c(a);
+                return true;
+            } catch (IOException ioexception) {
+                e.warn("Could not parse old ip banlist to convert it!", ioexception);
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
+
+    public static boolean c(MinecraftServer minecraftserver) {
+        OpList oplist = new OpList(PlayerList.c);
+
+        if (c.exists() && c.isFile()) {
+            if (oplist.c().exists()) {
+                /* CraftBukkit start - Exception is never thrown
+                try {
+                    oplist.load();
+                } catch (FileNotFoundException filenotfoundexception) {
+                    e.warn("Could not load existing file " + oplist.c().getName(), filenotfoundexception);
+                }
+                */
+                oplist.load();
+                // CraftBukkit end
+            }
+
+            try {
+                List list = Files.readLines(c, Charsets.UTF_8);
+                OpListProfileCallback oplistprofilecallback = new OpListProfileCallback(minecraftserver, oplist);
+
+                a(minecraftserver, list, oplistprofilecallback);
+                oplist.save();
+                c(c);
+                return true;
+            } catch (IOException ioexception) {
+                e.warn("Could not read old oplist to convert it!", ioexception);
+                return false;
+            } catch (FileConversionException fileconversionexception) {
+                e.error("Conversion failed, please try again later", fileconversionexception);
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
+
+    public static boolean d(MinecraftServer minecraftserver) {
+        WhiteList whitelist = new WhiteList(PlayerList.d);
+
+        if (d.exists() && d.isFile()) {
+            if (whitelist.c().exists()) {
+                /* CraftBukkit start - Exception is never thrown
+                try {
+                    whitelist.load();
+                } catch (FileNotFoundException filenotfoundexception) {
+                    e.warn("Could not load existing file " + whitelist.c().getName(), filenotfoundexception);
+                }
+                */
+                whitelist.load();
+                // CraftBukkit end
+            }
+
+            try {
+                List list = Files.readLines(d, Charsets.UTF_8);
+                WhiteListProfileCallback whitelistprofilecallback = new WhiteListProfileCallback(minecraftserver, whitelist);
+
+                a(minecraftserver, list, whitelistprofilecallback);
+                whitelist.save();
+                c(d);
+                return true;
+            } catch (IOException ioexception) {
+                e.warn("Could not read old whitelist to convert it!", ioexception);
+                return false;
+            } catch (FileConversionException fileconversionexception) {
+                e.error("Conversion failed, please try again later", fileconversionexception);
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
+
+    public static String a(String s) {
+        if (!UtilColor.b(s) && s.length() <= 16) {
+            MinecraftServer minecraftserver = MinecraftServer.getServer();
+            GameProfile gameprofile = minecraftserver.getUserCache().a(s);
+
+            if (gameprofile != null && gameprofile.getId() != null) {
+                return gameprofile.getId().toString();
+            } else if (!minecraftserver.N() && minecraftserver.getOnlineMode()) {
+                ArrayList arraylist = Lists.newArrayList();
+                GameProfileLookupCallback gameprofilelookupcallback = new GameProfileLookupCallback(minecraftserver, arraylist);
+
+                a(minecraftserver, Lists.newArrayList(new String[] { s}), gameprofilelookupcallback);
+                return arraylist.size() > 0 && ((GameProfile) arraylist.get(0)).getId() != null ? ((GameProfile) arraylist.get(0)).getId().toString() : "";
+            } else {
+                return EntityHuman.a(new GameProfile((UUID) null, s)).toString();
+            }
+        } else {
+            return s;
+        }
+    }
+
+    public static boolean a(DedicatedServer dedicatedserver, PropertyManager propertymanager) {
+        File file1 = d(propertymanager);
+        File file2 = new File(file1.getParentFile(), "playerdata");
+        File file3 = new File(file1.getParentFile(), "unknownplayers");
+
+        if (file1.exists() && file1.isDirectory()) {
+            File[] afile = file1.listFiles();
+            ArrayList arraylist = Lists.newArrayList();
+            File[] afile1 = afile;
+            int i = afile.length;
+
+            for (int j = 0; j < i; ++j) {
+                File file4 = afile1[j];
+                String s = file4.getName();
+
+                if (s.toLowerCase(Locale.ROOT).endsWith(".dat")) {
+                    String s1 = s.substring(0, s.length() - ".dat".length());
+
+                    if (s1.length() > 0) {
+                        arraylist.add(s1);
+                    }
+                }
+            }
+
+            try {
+                String[] astring = (String[]) arraylist.toArray(new String[arraylist.size()]);
+                PlayerDatFileConverter playerdatfileconverter = new PlayerDatFileConverter(dedicatedserver, file2, file3, file1, astring);
+
+                a(dedicatedserver, Lists.newArrayList(astring), playerdatfileconverter);
+                return true;
+            } catch (FileConversionException fileconversionexception) {
+                e.error("Conversion failed, please try again later", fileconversionexception);
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
+
+    private static void b(File file1) {
+        if (file1.exists()) {
+            if (!file1.isDirectory()) {
+                throw new FileConversionException("Can\'t create directory " + file1.getName() + " in world save directory.", (PredicateEmptyList) null);
+            }
+        } else if (!file1.mkdirs()) {
+            throw new FileConversionException("Can\'t create directory " + file1.getName() + " in world save directory.", (PredicateEmptyList) null);
+        }
+    }
+
+    public static boolean a(PropertyManager propertymanager) {
+        boolean flag = b(propertymanager);
+
+        flag = flag && c(propertymanager);
+        return flag;
+    }
+
+    private static boolean b(PropertyManager propertymanager) {
+        boolean flag = false;
+
+        if (b.exists() && b.isFile()) {
+            flag = true;
+        }
+
+        boolean flag1 = false;
+
+        if (a.exists() && a.isFile()) {
+            flag1 = true;
+        }
+
+        boolean flag2 = false;
+
+        if (c.exists() && c.isFile()) {
+            flag2 = true;
+        }
+
+        boolean flag3 = false;
+
+        if (d.exists() && d.isFile()) {
+            flag3 = true;
+        }
+
+        if (!flag && !flag1 && !flag2 && !flag3) {
+            return true;
+        } else {
+            e.warn("**** FAILED TO START THE SERVER AFTER ACCOUNT CONVERSION!");
+            e.warn("** please remove the following files and restart the server:");
+            if (flag) {
+                e.warn("* " + b.getName());
+            }
+
+            if (flag1) {
+                e.warn("* " + a.getName());
+            }
+
+            if (flag2) {
+                e.warn("* " + c.getName());
+            }
+
+            if (flag3) {
+                e.warn("* " + d.getName());
+            }
+
+            return false;
+        }
+    }
+
+    private static boolean c(PropertyManager propertymanager) {
+        File file1 = d(propertymanager);
+
+        if (file1.exists() && file1.isDirectory()) {
+            String[] astring = file1.list(new DatFilenameFilter());
+
+            if (astring.length > 0) {
+                e.warn("**** DETECTED OLD PLAYER FILES IN THE WORLD SAVE");
+                e.warn("**** THIS USUALLY HAPPENS WHEN THE AUTOMATIC CONVERSION FAILED IN SOME WAY");
+                e.warn("** please restart the server and if the problem persists, remove the directory \'{}\'", new Object[] { file1.getPath()});
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static File d(PropertyManager propertymanager) {
+        String s = propertymanager.getString("level-name", "world");
+        File file1 = new File(s);
+
+        return new File(file1, "players");
+    }
+
+    private static void c(File file1) {
+        File file2 = new File(file1.getName() + ".converted");
+
+        file1.renameTo(file2);
+    }
+
+    private static Date b(String s, Date date) {
+        Date date1;
+
+        try {
+            date1 = ExpirableListEntry.a.parse(s);
+        } catch (ParseException parseexception) {
+            date1 = date;
+        }
+
+        return date1;
+    }
+
+    static Logger a() {
+        return e;
+    }
+
+    static Date a(String s, Date date) {
+        return b(s, date);
+    }
+
+    static void a(File file1) {
+        b(file1);
+    }
+}

src/main/java/net/minecraft/server/NetworkManager.java

@@ -40,6 +40,7 @@ public class NetworkManager extends SimpleChannelInboundHandler {
     private PacketListener o;
     private EnumProtocol p;
     private IChatBaseComponent q;
+    private boolean r;
 
     public NetworkManager(boolean flag) {
         this.j = flag;
@@ -86,7 +87,7 @@ public class NetworkManager extends SimpleChannelInboundHandler {
 
     public void handle(Packet packet, GenericFutureListener... agenericfuturelistener) {
         if (this.m != null && this.m.isOpen()) {
-            this.h();
+            this.i();
             this.b(packet, agenericfuturelistener);
         } else {
             this.l.add(new QueuedPacket(packet, agenericfuturelistener));
@@ -113,7 +114,7 @@ public class NetworkManager extends SimpleChannelInboundHandler {
         }
     }
 
-    private void h() {
+    private void i() {
         if (this.m != null && this.m.isOpen()) {
             while (!this.l.isEmpty()) {
                 QueuedPacket queuedpacket = (QueuedPacket) this.l.poll();
@@ -124,7 +125,7 @@ public class NetworkManager extends SimpleChannelInboundHandler {
     }
 
     public void a() {
-        this.h();
+        this.i();
         EnumProtocol enumprotocol = (EnumProtocol) this.m.attr(d).get();
 
         if (this.p != enumprotocol) {
@@ -171,6 +172,7 @@ public class NetworkManager extends SimpleChannelInboundHandler {
     public void a(SecretKey secretkey) {
         this.m.pipeline().addBefore("splitter", "decrypt", new PacketDecrypter(MinecraftEncryption.a(2, secretkey)));
         this.m.pipeline().addBefore("prepender", "encrypt", new PacketEncrypter(MinecraftEncryption.a(1, secretkey)));
+        this.r = true;
     }
 
     public boolean isConnected() {

src/main/java/net/minecraft/server/PacketDataSerializer.java

@@ -74,7 +74,7 @@ public class PacketDataSerializer extends ByteBuf {
             byte[] abyte = new byte[short1];
 
             this.readBytes(abyte);
-            return NBTCompressedStreamTools.a(abyte);
+            return NBTCompressedStreamTools.a(abyte, new NBTReadLimiter(2097152L));
         }
     }
 

src/main/java/net/minecraft/server/PacketPlayOutNamedEntitySpawn.java

@@ -1,8 +1,11 @@
 package net.minecraft.server;
 
+import java.util.Iterator;
 import java.util.List;
+import java.util.UUID;
 
 import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.properties.Property;
 
 import java.io.IOException; // CraftBukkit
 
@@ -37,7 +40,19 @@ public class PacketPlayOutNamedEntitySpawn extends Packet {
 
     public void a(PacketDataSerializer packetdataserializer) throws IOException { // CraftBukkit - added throws
         this.a = packetdataserializer.a();
-        this.b = new GameProfile(packetdataserializer.c(36), packetdataserializer.c(16));
+        UUID uuid = UUID.fromString(packetdataserializer.c(36));
+
+        this.b = new GameProfile(uuid, packetdataserializer.c(16));
+        int i = packetdataserializer.a();
+
+        for (int j = 0; j < i; ++j) {
+            String s = packetdataserializer.c(32767);
+            String s1 = packetdataserializer.c(32767);
+            String s2 = packetdataserializer.c(32767);
+
+            this.b.getProperties().put(s, new Property(s, s1, s2));
+        }
+
         this.c = packetdataserializer.readInt();
         this.d = packetdataserializer.readInt();
         this.e = packetdataserializer.readInt();
@@ -49,8 +64,21 @@ public class PacketPlayOutNamedEntitySpawn extends Packet {
 
     public void b(PacketDataSerializer packetdataserializer) throws IOException { // CraftBukkit - added throws
         packetdataserializer.b(this.a);
-        packetdataserializer.a(this.b.getId());
+        UUID uuid = this.b.getId();
+
+        packetdataserializer.a(uuid == null ? "" : uuid.toString());
         packetdataserializer.a(this.b.getName().length() > 16 ? this.b.getName().substring(0, 16) : this.b.getName()); // CraftBukkit - Limit name length to 16 characters
+        packetdataserializer.b(this.b.getProperties().size());
+        Iterator iterator = this.b.getProperties().values().iterator();
+
+        while (iterator.hasNext()) {
+            Property property = (Property) iterator.next();
+
+            packetdataserializer.a(property.getName());
+            packetdataserializer.a(property.getValue());
+            packetdataserializer.a(property.getSignature());
+        }
+
         packetdataserializer.writeInt(this.c);
         packetdataserializer.writeInt(this.d);
         packetdataserializer.writeInt(this.e);

src/main/java/net/minecraft/server/PacketStatusListener.java

@@ -116,7 +116,7 @@ public class PacketStatusListener implements PacketStatusInListener {
         ping.setFavicon(event.icon.value);
         ping.setMOTD(new ChatComponentText(event.getMotd()));
         ping.setPlayerSample(playerSample);
-        ping.setServerInfo(new ServerPingServerData(minecraftServer.getServerModName() + " " + minecraftServer.getVersion(), 4)); // TODO: Update when protocol changes
+        ping.setServerInfo(new ServerPingServerData(minecraftServer.getServerModName() + " " + minecraftServer.getVersion(), 5)); // TODO: Update when protocol changes
 
         this.networkManager.handle(new PacketStatusOutServerInfo(ping), new GenericFutureListener[0]);
         // CraftBukkit end

src/main/java/net/minecraft/server/PathfinderGoalTarget.java

@@ -78,8 +78,8 @@ public abstract class PathfinderGoalTarget extends PathfinderGoal {
         } else if (!this.c.a(entityliving.getClass())) {
             return false;
         } else {
-            if (this.c instanceof EntityOwnable && StringUtils.isNotEmpty(((EntityOwnable) this.c).getOwnerName())) {
-                if (entityliving instanceof EntityOwnable && ((EntityOwnable) this.c).getOwnerName().equals(((EntityOwnable) entityliving).getOwnerName())) {
+            if (this.c instanceof EntityOwnable && StringUtils.isNotEmpty(((EntityOwnable) this.c).getOwnerUUID())) {
+                if (entityliving instanceof EntityOwnable && ((EntityOwnable) this.c).getOwnerUUID().equals(((EntityOwnable) entityliving).getOwnerUUID())) {
                     return false;
                 }
 

src/main/java/net/minecraft/server/PlayerChunkMap.java

@@ -28,7 +28,7 @@ public class PlayerChunkMap {
 
     public PlayerChunkMap(WorldServer worldserver) {
         this.world = worldserver;
-        this.a(worldserver.getMinecraftServer().getPlayerList().o());
+        this.a(worldserver.getMinecraftServer().getPlayerList().s());
     }
 
     public WorldServer a() {

src/main/java/net/minecraft/server/PlayerConnection.java

@@ -4,6 +4,7 @@ import java.io.ByteArrayInputStream;
 import java.io.DataInputStream;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.Iterator;
 import java.util.Random;
 import java.util.concurrent.Callable;
@@ -356,7 +357,7 @@ public class PlayerConnection implements PacketPlayInListener {
                 // CraftBukkit end
                 double d10 = d7 * d7 + d8 * d8 + d9 * d9;
 
-                if (d10 > 100.0D && this.checkMovement && (!this.minecraftServer.M() || !this.minecraftServer.L().equals(this.player.getName()))) { // CraftBukkit - Added this.checkMovement condition to solve this check being triggered by teleports
+                if (d10 > 100.0D && this.checkMovement && (!this.minecraftServer.N() || !this.minecraftServer.M().equals(this.player.getName()))) { // CraftBukkit - Added this.checkMovement condition to solve this check being triggered by teleports
                     c.warn(this.player.getName() + " moved too quickly! " + d4 + "," + d5 + "," + d6 + " (" + d7 + ", " + d8 + ", " + d9 + ")");
                     this.a(this.y, this.z, this.q, this.player.yaw, this.player.pitch);
                     return;
@@ -689,7 +690,7 @@ public class PlayerConnection implements PacketPlayInListener {
         }
         // CraftBukkit end
         c.info(this.player.getName() + " lost connection: " + ichatbasecomponent.c()); // CraftBukkit - Don't toString the component
-        this.minecraftServer.av();
+        this.minecraftServer.az();
         // CraftBukkit start - Replace vanilla quit message handling with our own.
         /*
         ChatMessage chatmessage = new ChatMessage("multiplayer.player.left", new Object[] { this.player.getScoreboardDisplayName()});
@@ -704,7 +705,7 @@ public class PlayerConnection implements PacketPlayInListener {
             this.minecraftServer.getPlayerList().sendMessage(CraftChatMessage.fromString(quitMessage));
         }
         // CraftBukkit end
-        if (this.minecraftServer.M() && this.player.getName().equals(this.minecraftServer.L())) {
+        if (this.minecraftServer.N() && this.player.getName().equals(this.minecraftServer.M())) {
             c.info("Stopping singleplayer server as player logged out");
             this.minecraftServer.safeShutdown();
         }
@@ -835,7 +836,7 @@ public class PlayerConnection implements PacketPlayInListener {
 
             // CraftBukkit start - replaced with thread safe throttle
             // this.chatThrottle += 20;
-            if (chatSpamField.addAndGet(this, 20) > 200 && !this.minecraftServer.getPlayerList().isOp(this.player.getName())) {
+            if (chatSpamField.addAndGet(this, 20) > 200 && !this.minecraftServer.getPlayerList().isOp(this.player.getProfile())) {
                 if (packetplayinchat.a()) {
                     Waitable waitable = new Waitable() {
                         @Override
@@ -1120,14 +1121,13 @@ public class PlayerConnection implements PacketPlayInListener {
             if (this.player.viewingCredits) {
                 this.minecraftServer.getPlayerList().changeDimension(this.player, 0, PlayerTeleportEvent.TeleportCause.END_PORTAL); // CraftBukkit - reroute logic through custom portal management
             } else if (this.player.r().getWorldData().isHardcore()) {
-                if (this.minecraftServer.M() && this.player.getName().equals(this.minecraftServer.L())) {
+                if (this.minecraftServer.N() && this.player.getName().equals(this.minecraftServer.M())) {
                     this.player.playerConnection.disconnect("You have died. Game over, man, it\'s game over!");
-                    this.minecraftServer.T();
+                    this.minecraftServer.U();
                 } else {
-                    BanEntry banentry = new BanEntry(this.player.getName());
+                    GameProfileBanEntry gameprofilebanentry = new GameProfileBanEntry(this.player.getProfile(), (Date) null, "(You just lost the game)", (Date) null, "Death in Hardcore");
 
-                    banentry.setReason("Death in Hardcore");
-                    this.minecraftServer.getPlayerList().getNameBans().add(banentry);
+                    this.minecraftServer.getPlayerList().getProfileBans().add(gameprofilebanentry);
                     this.player.playerConnection.disconnect("You have died. Game over, man, it\'s game over!");
                 }
             } else {
@@ -1654,16 +1654,16 @@ public class PlayerConnection implements PacketPlayInListener {
 
             try {
                 itemstack = packetdataserializer.c();
-                if (itemstack != null) {
-                    if (!ItemBookAndQuill.a(itemstack.getTag())) {
-                        throw new IOException("Invalid book tag!");
-                    }
+                if (itemstack == null) {
+                    return;
+                }
 
-                    itemstack1 = this.player.inventory.getItemInHand();
-                    if (itemstack1 == null) {
-                        return;
-                    }
+                if (!ItemBookAndQuill.a(itemstack.getTag())) {
+                    throw new IOException("Invalid book tag!");
+                }
 
+                itemstack1 = this.player.inventory.getItemInHand();
+                if (itemstack1 != null) {
                     if (itemstack.getItem() == Items.BOOK_AND_QUILL && itemstack.getItem() == itemstack1.getItem()) {
                         itemstack1.a("pages", (NBTBase) itemstack.getTag().getList("pages", 8));
                     }
@@ -1686,18 +1686,18 @@ public class PlayerConnection implements PacketPlayInListener {
 
             try {
                 itemstack = packetdataserializer.c();
-                if (itemstack == null) {
-                    return;
-                }
+                if (itemstack != null) {
+                    if (!ItemWrittenBook.a(itemstack.getTag())) {
+                        throw new IOException("Invalid book tag!");
+                    }
 
-                if (!ItemWrittenBook.a(itemstack.getTag())) {
-                    throw new IOException("Invalid book tag!");
-                }
+                    itemstack1 = this.player.inventory.getItemInHand();
+                    if (itemstack1 == null) {
+                        return;
+                    }
 
-                itemstack1 = this.player.inventory.getItemInHand();
-                if (itemstack1 != null) {
                     if (itemstack.getItem() == Items.WRITTEN_BOOK && itemstack1.getItem() == Items.BOOK_AND_QUILL) {
-                        CraftEventFactory.handleEditBookEvent(player, itemstack); // CraftBukkit
+                        CraftEventFactory.handleEditBookEvent(player, itemstack); // CraftBukkit
                     }
 
                     return;

src/main/java/net/minecraft/server/PlayerDatFileConverter.java

@@ -0,0 +1,98 @@
+package net.minecraft.server;
+
+import java.io.File;
+import java.util.UUID;
+
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.ProfileLookupCallback;
+import net.minecraft.util.com.mojang.authlib.yggdrasil.ProfileNotFoundException;
+
+final class PlayerDatFileConverter implements ProfileLookupCallback {
+
+    final DedicatedServer a;
+    final File b;
+    final File c;
+    final File d;
+    final String[] e;
+
+    PlayerDatFileConverter(DedicatedServer dedicatedserver, File file1, File file2, File file3, String[] astring) {
+        this.a = dedicatedserver;
+        this.b = file1;
+        this.c = file2;
+        this.d = file3;
+        this.e = astring;
+    }
+
+    public void onProfileLookupSucceeded(GameProfile gameprofile) {
+        this.a.getUserCache().a(gameprofile);
+        UUID uuid = gameprofile.getId();
+
+        if (uuid == null) {
+            throw new FileConversionException("Missing UUID for user profile " + gameprofile.getName(), (PredicateEmptyList) null);
+        } else {
+            this.a(this.b, this.a(gameprofile), uuid.toString());
+        }
+    }
+
+    public void onProfileLookupFailed(GameProfile gameprofile, Exception exception) {
+        NameReferencingFileConverter.a().warn("Could not lookup user uuid for " + gameprofile.getName(), exception);
+        if (exception instanceof ProfileNotFoundException) {
+            String s = this.a(gameprofile);
+
+            this.a(this.c, s, s);
+        } else {
+            throw new FileConversionException("Could not request user " + gameprofile.getName() + " from backend systems", exception, (PredicateEmptyList) null);
+        }
+    }
+
+    private void a(File file1, String s, String s1) {
+        File file2 = new File(this.d, s + ".dat");
+        File file3 = new File(file1, s1 + ".dat");
+
+        // CraftBukkit start - Use old file name to seed lastKnownName
+        NBTTagCompound root = null;
+
+        try {
+            root = NBTCompressedStreamTools.a(new java.io.FileInputStream(file2));
+        } catch (Exception exception) {
+            exception.printStackTrace();
+        }
+
+        if (root != null) {
+            if (!root.hasKey("bukkit")) {
+                root.set("bukkit", new NBTTagCompound());
+            }
+            NBTTagCompound data = root.getCompound("bukkit");
+            data.setString("lastKnownName", s);
+
+            try {
+                NBTCompressedStreamTools.a(root, new java.io.FileOutputStream(file2));
+            } catch (Exception exception) {
+                exception.printStackTrace();
+            }
+        }
+        // CraftBukkit end
+
+        NameReferencingFileConverter.a(file1);
+        if (!file2.renameTo(file3)) {
+            throw new FileConversionException("Could not convert file for " + s, (PredicateEmptyList) null);
+        }
+    }
+
+    private String a(GameProfile gameprofile) {
+        String s = null;
+
+        for (int i = 0; i < this.e.length; ++i) {
+            if (this.e[i] != null && this.e[i].equalsIgnoreCase(gameprofile.getName())) {
+                s = this.e[i];
+                break;
+            }
+        }
+
+        if (s == null) {
+            throw new FileConversionException("Could not find the filename for " + gameprofile.getName() + " anymore", (PredicateEmptyList) null);
+        } else {
+            return s;
+        }
+    }
+}

src/main/java/net/minecraft/server/PlayerList.java

@@ -9,10 +9,11 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
+import java.util.UUID;
 import java.util.Map.Entry;
 
 import net.minecraft.util.com.google.common.base.Charsets;
+import net.minecraft.util.com.google.common.collect.Lists;
 import net.minecraft.util.com.google.common.collect.Maps;
 import net.minecraft.util.com.mojang.authlib.GameProfile;
 import org.apache.logging.log4j.LogManager;
@@ -39,22 +40,26 @@ import org.bukkit.util.Vector;
 
 public abstract class PlayerList {
 
-    private static final Logger c = LogManager.getLogger();
-    private static final SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd \'at\' HH:mm:ss z");
+    public static final File a = new File("banned-players.json");
+    public static final File b = new File("banned-ips.json");
+    public static final File c = new File("ops.json");
+    public static final File d = new File("whitelist.json");
+    private static final Logger g = LogManager.getLogger();
+    private static final SimpleDateFormat h = new SimpleDateFormat("yyyy-MM-dd \'at\' HH:mm:ss z");
     private final MinecraftServer server;
     public final List players = new java.util.concurrent.CopyOnWriteArrayList(); // CraftBukkit - ArrayList -> CopyOnWriteArrayList: Iterator safety
-    private final BanList banByName = new BanList(new File("banned-players.txt"));
-    private final BanList banByIP = new BanList(new File("banned-ips.txt"));
-    private final Set operators = new HashSet();
-    private final Set whitelist = new java.util.LinkedHashSet(); // CraftBukkit - HashSet -> LinkedHashSet
-    private final Map j = Maps.newHashMap();
+    private final GameProfileBanList j;
+    private final IpBanList k;
+    private final OpList operators;
+    private final WhiteList whitelist;
+    private final Map n;
     public IPlayerFileData playerFileData; // CraftBukkit - private -> public
     public boolean hasWhitelist; // CraftBukkit - private -> public
     protected int maxPlayers;
-    protected int m;
-    private EnumGamemode n;
-    private boolean o;
-    private int p;
+    private int q;
+    private EnumGamemode r;
+    private boolean s;
+    private int t;
 
     // CraftBukkit start
     private CraftServer cserver;
@@ -66,25 +71,36 @@ public abstract class PlayerList {
         this.cserver = minecraftserver.server;
         // CraftBukkit end
 
+        this.j = new GameProfileBanList(a);
+        this.k = new IpBanList(b);
+        this.operators = new OpList(c);
+        this.whitelist = new WhiteList(d);
+        this.n = Maps.newHashMap();
         this.server = minecraftserver;
-        this.banByName.setEnabled(false);
-        this.banByIP.setEnabled(false);
+        this.j.a(false);
+        this.k.a(false);
         this.maxPlayers = 8;
     }
 
     public void a(NetworkManager networkmanager, EntityPlayer entityplayer) {
+        GameProfile gameprofile = entityplayer.getProfile();
+        UserCache usercache = this.server.getUserCache();
+        GameProfile gameprofile1 = usercache.a(gameprofile.getId());
+        String s = gameprofile1 == null ? gameprofile.getName() : gameprofile1.getName();
+
+        usercache.a(gameprofile);
         NBTTagCompound nbttagcompound = this.a(entityplayer);
 
         entityplayer.spawnIn(this.server.getWorldServer(entityplayer.dimension));
         entityplayer.playerInteractManager.a((WorldServer) entityplayer.world);
-        String s = "local";
+        String s1 = "local";
 
         if (networkmanager.getSocketAddress() != null) {
-            s = networkmanager.getSocketAddress().toString();
+            s1 = networkmanager.getSocketAddress().toString();
         }
 
         // CraftBukkit - Moved message to after join
-        // c.info(entityplayer.getName() + "[" + s + "] logged in with entity id " + entityplayer.getId() + " at (" + entityplayer.locX + ", " + entityplayer.locY + ", " + entityplayer.locZ + ")");
+        // g.info(entityplayer.getName() + "[" + s1 + "] logged in with entity id " + entityplayer.getId() + " at (" + entityplayer.locX + ", " + entityplayer.locY + ", " + entityplayer.locZ + ")");
         WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension);
         ChunkCoordinates chunkcoordinates = worldserver.getSpawn();
 
@@ -106,13 +122,19 @@ public abstract class PlayerList {
         entityplayer.getStatisticManager().d();
         entityplayer.getStatisticManager().updateStatistics(entityplayer);
         this.a((ScoreboardServer) worldserver.getScoreboard(), entityplayer);
-        this.server.av();
+        this.server.az();
         /* CraftBukkit start - login message is handled in the event
-        ChatMessage chatmessage = new ChatMessage("multiplayer.player.joined", new Object[] { entityplayer.getScoreboardDisplayName()});
+        ChatMessage chatmessage;
+
+        if (!entityplayer.getName().equalsIgnoreCase(s)) {
+            chatmessage = new ChatMessage("multiplayer.player.joined.renamed", new Object[] { entityplayer.getScoreboardDisplayName(), s});
+        } else {
+            chatmessage = new ChatMessage("multiplayer.player.joined", new Object[] { entityplayer.getScoreboardDisplayName()});
+        }
 
         chatmessage.getChatModifier().setColor(EnumChatFormat.YELLOW);
         this.sendMessage(chatmessage);
-        // CraftBukkit end*/
+        // CraftBukkit end */
         this.c(entityplayer);
         worldserver = this.server.getWorldServer(entityplayer.dimension); // CraftBukkit - Update in case join event changed it
         playerconnection.a(entityplayer.locX, entityplayer.locY, entityplayer.locZ, entityplayer.yaw, entityplayer.pitch);
@@ -142,7 +164,7 @@ public abstract class PlayerList {
         }
 
         // CraftBukkit - Moved from above, added world
-        c.info(entityplayer.getName() + "[" + s + "] logged in with entity id " + entityplayer.getId() + " at ([" + entityplayer.world.worldData.getName() + "] " + entityplayer.locX + ", " + entityplayer.locY + ", " + entityplayer.locZ + ")");
+        g.info(entityplayer.getName() + "[" + s + "] logged in with entity id " + entityplayer.getId() + " at ([" + entityplayer.world.worldData.getName() + "] " + entityplayer.locX + ", " + entityplayer.locY + ", " + entityplayer.locZ + ")");
     }
 
     public void a(ScoreboardServer scoreboardserver, EntityPlayer entityplayer) { // CraftBukkit - protected -> public
@@ -189,8 +211,8 @@ public abstract class PlayerList {
         worldserver1.chunkProviderServer.getChunkAt((int) entityplayer.locX >> 4, (int) entityplayer.locZ >> 4);
     }
 
-    public int a() {
-        return PlayerChunkMap.getFurthestViewableBlock(this.o());
+    public int d() {
+        return PlayerChunkMap.getFurthestViewableBlock(this.s());
     }
 
     public NBTTagCompound a(EntityPlayer entityplayer) {
@@ -198,10 +220,10 @@ public abstract class PlayerList {
         NBTTagCompound nbttagcompound = this.server.worlds.get(0).getWorldData().i();
         NBTTagCompound nbttagcompound1;
 
-        if (entityplayer.getName().equals(this.server.L()) && nbttagcompound != null) {
+        if (entityplayer.getName().equals(this.server.M()) && nbttagcompound != null) {
             entityplayer.f(nbttagcompound);
             nbttagcompound1 = nbttagcompound;
-            c.debug("loading single player");
+            g.debug("loading single player");
         } else {
             nbttagcompound1 = this.playerFileData.load(entityplayer);
         }
@@ -211,7 +233,7 @@ public abstract class PlayerList {
 
     protected void b(EntityPlayer entityplayer) {
         this.playerFileData.save(entityplayer);
-        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.j.get(entityplayer.getName());
+        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.n.get(entityplayer.getUniqueID());
 
         if (serverstatisticmanager != null) {
             serverstatisticmanager.b();
@@ -285,18 +307,19 @@ public abstract class PlayerList {
         this.cserver.getPluginManager().callEvent(playerQuitEvent);
         entityplayer.getBukkitEntity().disconnect(playerQuitEvent.getQuitMessage());
         // CraftBukkit end
+
         this.b(entityplayer);
         WorldServer worldserver = entityplayer.r();
 
         if (entityplayer.vehicle != null && !(entityplayer.vehicle instanceof EntityPlayer)) { // CraftBukkit - Don't remove players
             worldserver.removeEntity(entityplayer.vehicle);
-            c.debug("removing player mount");
+            g.debug("removing player mount");
         }
 
         worldserver.kill(entityplayer);
         worldserver.getPlayerChunkMap().removePlayer(entityplayer);
         this.players.remove(entityplayer);
-        this.j.remove(entityplayer.getName());
+        this.n.remove(entityplayer.getUniqueID());
         ChunkIOExecutor.adjustPoolSize(this.getPlayerCount()); // CraftBukkit
 
         // CraftBukkit start - .name -> .listName, replace sendAll with loop
@@ -307,6 +330,8 @@ public abstract class PlayerList {
 
             if (entityplayer1.getBukkitEntity().canSee(entityplayer.getBukkitEntity())) {
                 entityplayer1.playerConnection.sendPacket(packet);
+            } else {
+                entityplayer1.getBukkitEntity().removeDisconnectingPlayer(entityplayer.getBukkitEntity());
             }
         }
         // This removes the scoreboard (and player reference) for the specific player in the manager
@@ -326,40 +351,35 @@ public abstract class PlayerList {
         EntityPlayer entity = new EntityPlayer(this.server, this.server.getWorldServer(0), gameprofile, new PlayerInteractManager(this.server.getWorldServer(0)));
         Player player = entity.getBukkitEntity();
         PlayerLoginEvent event = new PlayerLoginEvent(player, hostname, ((java.net.InetSocketAddress) socketaddress).getAddress());
+        String s;
 
-        if (this.banByName.isBanned(gameprofile.getName())) {
-            BanEntry banentry = (BanEntry) this.banByName.getEntries().get(gameprofile.getName());
-            String s = "You are banned from this server!\nReason: " + banentry.getReason();
+        if (this.j.isBanned(gameprofile)) {
+            GameProfileBanEntry gameprofilebanentry = (GameProfileBanEntry) this.j.get(gameprofile);
 
-            if (banentry.getExpires() != null) {
-                s = s + "\nYour ban will be removed on " + d.format(banentry.getExpires());
+            s = "You are banned from this server!\nReason: " + gameprofilebanentry.getReason();
+            if (gameprofilebanentry.getExpires() != null) {
+                s = s + "\nYour ban will be removed on " + h.format(gameprofilebanentry.getExpires());
             }
 
             // return s;
             event.disallow(PlayerLoginEvent.Result.KICK_BANNED, s);
-        } else if (!this.isWhitelisted(gameprofile.getName())) {
+        } else if (!this.isWhitelisted(gameprofile)) {
             // return "You are not white-listed on this server!";
             event.disallow(PlayerLoginEvent.Result.KICK_WHITELIST, "You are not white-listed on this server!");
+        } else if (this.k.isBanned(socketaddress)) {
+            IpBanEntry ipbanentry = this.k.get(socketaddress);
+
+            s = "Your IP address is banned from this server!\nReason: " + ipbanentry.getReason();
+            if (ipbanentry.getExpires() != null) {
+                s = s + "\nYour ban will be removed on " + h.format(ipbanentry.getExpires());
+            }
+
+            // return s2;
+            event.disallow(PlayerLoginEvent.Result.KICK_BANNED, s);
         } else {
-            String s1 = socketaddress.toString();
-
-            s1 = s1.substring(s1.indexOf("/") + 1);
-            s1 = s1.substring(0, s1.indexOf(":"));
-            if (this.banByIP.isBanned(s1)) {
-                BanEntry banentry1 = (BanEntry) this.banByIP.getEntries().get(s1);
-                String s2 = "Your IP address is banned from this server!\nReason: " + banentry1.getReason();
-
-                if (banentry1.getExpires() != null) {
-                    s2 = s2 + "\nYour ban will be removed on " + d.format(banentry1.getExpires());
-                }
-
-                // return s2;
-                event.disallow(PlayerLoginEvent.Result.KICK_BANNED, s2);
-            } else {
-                // return this.players.size() >= this.maxPlayers ? "The server is full!" : null;
-                if (this.players.size() >= this.maxPlayers) {
-                    event.disallow(PlayerLoginEvent.Result.KICK_FULL, "The server is full!");
-                }
+            // return this.players.size() >= this.maxPlayers ? "The server is full!" : null;
+            if (this.players.size() >= this.maxPlayers) {
+                event.disallow(PlayerLoginEvent.Result.KICK_FULL, "The server is full!");
             }
         }
 
@@ -374,13 +394,14 @@ public abstract class PlayerList {
     }
 
     public EntityPlayer processLogin(GameProfile gameprofile, EntityPlayer player) { // CraftBukkit - added EntityPlayer
-        ArrayList arraylist = new ArrayList();
+        UUID uuid = EntityHuman.a(gameprofile);
+        ArrayList arraylist = Lists.newArrayList();
 
         EntityPlayer entityplayer;
 
         for (int i = 0; i < this.players.size(); ++i) {
             entityplayer = (EntityPlayer) this.players.get(i);
-            if (entityplayer.getName().equalsIgnoreCase(gameprofile.getName())) {
+            if (entityplayer.getUniqueID().equals(uuid)) {
                 arraylist.add(entityplayer);
             }
         }
@@ -395,7 +416,7 @@ public abstract class PlayerList {
         /* CraftBukkit start
         Object object;
 
-        if (this.server.Q()) {
+        if (this.server.R()) {
             object = new DemoPlayerInteractManager(this.server.getWorldServer(0));
         } else {
             object = new PlayerInteractManager(this.server.getWorldServer(0));
@@ -426,7 +447,7 @@ public abstract class PlayerList {
         entityplayer.dimension = i;
         Object object;
 
-        if (this.server.Q()) {
+        if (this.server.R()) {
             object = new DemoPlayerInteractManager(this.server.getWorldServer(entityplayer.dimension));
         } else {
             object = new PlayerInteractManager(this.server.getWorldServer(entityplayer.dimension));
@@ -443,8 +464,8 @@ public abstract class PlayerList {
         entityplayer1.copyTo(entityplayer, flag);
         entityplayer1.d(entityplayer.getId());
         // WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension); // CraftBukkit - handled later
-        // this.a(entityplayer1, entityplayer, worldserver); // CraftBukkit - removed
 
+        // this.a(entityplayer1, entityplayer, worldserver); // CraftBukkit - removed
         ChunkCoordinates chunkcoordinates1;
 
         // CraftBukkit start - fire PlayerRespawnEvent
@@ -750,7 +771,7 @@ public abstract class PlayerList {
                 // worldserver1.s().a(entity, d3, d4, d5, f);
                 if (portal) {
                     Vector velocity = entity.getBukkitEntity().getVelocity();
-                    worldserver1.getTravelAgent().adjustExit(entity, exit, velocity); // Should be getTravelAgent
+                    worldserver1.getTravelAgent().adjustExit(entity, exit, velocity);
                     entity.setPositionRotation(exit.getX(), exit.getY(), exit.getZ(), exit.getYaw(), exit.getPitch());
                     if (entity.motX != velocity.getX() || entity.motY != velocity.getY() || entity.motZ != velocity.getZ()) {
                         entity.getBukkitEntity().setVelocity(velocity);
@@ -768,8 +789,8 @@ public abstract class PlayerList {
     }
 
     public void tick() {
-        if (++this.p > 600) {
-            this.p = 0;
+        if (++this.t > 600) {
+            this.t = 0;
         }
 
         /* CraftBukkit start - Remove updating of lag to players -- it spams way to much on big servers.
@@ -797,21 +818,25 @@ public abstract class PlayerList {
         }
     }
 
-    public String c() {
+    public String b(boolean flag) {
         String s = "";
+        ArrayList arraylist = Lists.newArrayList(this.players);
 
-        for (int i = 0; i < this.players.size(); ++i) {
+        for (int i = 0; i < arraylist.size(); ++i) {
             if (i > 0) {
                 s = s + ", ";
             }
 
-            s = s + ((EntityPlayer) this.players.get(i)).getName();
+            s = s + ((EntityPlayer) arraylist.get(i)).getName();
+            if (flag) {
+                s = s + " (" + ((EntityPlayer) arraylist.get(i)).getUniqueID().toString() + ")";
+            }
         }
 
         return s;
     }
 
-    public String[] d() {
+    public String[] f() {
         String[] astring = new String[this.players.size()];
 
         for (int i = 0; i < this.players.size(); ++i) {
@@ -821,44 +846,53 @@ public abstract class PlayerList {
         return astring;
     }
 
-    public BanList getNameBans() {
-        return this.banByName;
+    public GameProfile[] g() {
+        GameProfile[] agameprofile = new GameProfile[this.players.size()];
+
+        for (int i = 0; i < this.players.size(); ++i) {
+            agameprofile[i] = ((EntityPlayer) this.players.get(i)).getProfile();
+        }
+
+        return agameprofile;
     }
 
-    public BanList getIPBans() {
-        return this.banByIP;
+    public GameProfileBanList getProfileBans() {
+        return this.j;
     }
 
-    public void addOp(String s) {
-        this.operators.add(s.toLowerCase());
+    public IpBanList getIPBans() {
+        return this.k;
+    }
+
+    public void addOp(GameProfile gameprofile) {
+        this.operators.add(new OpListEntry(gameprofile, this.server.l()));
 
         // CraftBukkit start
-        Player player = server.server.getPlayerExact(s);
+        Player player = server.server.getPlayer(gameprofile.getId());
         if (player != null) {
             player.recalculatePermissions();
         }
         // CraftBukkit end
     }
 
-    public void removeOp(String s) {
-        this.operators.remove(s.toLowerCase());
+    public void removeOp(GameProfile gameprofile) {
+        this.operators.remove(gameprofile);
 
         // CraftBukkit start
-        Player player = server.server.getPlayerExact(s);
+        Player player = server.server.getPlayer(gameprofile.getId());
         if (player != null) {
             player.recalculatePermissions();
         }
         // CraftBukkit end
     }
 
-    public boolean isWhitelisted(String s) {
-        s = s.trim().toLowerCase();
-        return !this.hasWhitelist || this.operators.contains(s) || this.whitelist.contains(s);
+    public boolean isWhitelisted(GameProfile gameprofile) {
+        return !this.hasWhitelist || this.operators.d(gameprofile) || this.whitelist.d(gameprofile);
     }
 
-    public boolean isOp(String s) {
+    public boolean isOp(GameProfile gameprofile) {
         // CraftBukkit - fix reference to worldserver array
-        return this.operators.contains(s.trim().toLowerCase()) || this.server.M() && this.server.worlds.get(0).getWorldData().allowCommands() && this.server.L().equalsIgnoreCase(s) || this.o;
+        return this.operators.d(gameprofile) || this.server.N() && this.server.worlds.get(0).getWorldData().allowCommands() && this.server.M().equalsIgnoreCase(gameprofile.getName()) || this.s;
     }
 
     public EntityPlayer getPlayer(String s) {
@@ -1015,22 +1049,30 @@ public abstract class PlayerList {
         }
     }
 
-    public void addWhitelist(String s) {
-        this.whitelist.add(s);
+    public void addWhitelist(GameProfile gameprofile) {
+        this.whitelist.add(new WhiteListEntry(gameprofile));
     }
 
-    public void removeWhitelist(String s) {
-        this.whitelist.remove(s);
+    public void removeWhitelist(GameProfile gameprofile) {
+        this.whitelist.remove(gameprofile);
     }
 
-    public Set getWhitelisted() {
+    public WhiteList getWhitelist() {
         return this.whitelist;
     }
 
-    public Set getOPs() {
+    public String[] getWhitelisted() {
+        return this.whitelist.getEntries();
+    }
+
+    public OpList getOPs() {
         return this.operators;
     }
 
+    public String[] n() {
+        return this.operators.getEntries();
+    }
+
     public void reloadWhitelist() {}
 
     public void b(EntityPlayer entityplayer, WorldServer worldserver) {
@@ -1072,7 +1114,7 @@ public abstract class PlayerList {
         this.hasWhitelist = flag;
     }
 
-    public List h(String s) {
+    public List b(String s) {
         ArrayList arraylist = new ArrayList();
         Iterator iterator = this.players.iterator();
 
@@ -1087,29 +1129,29 @@ public abstract class PlayerList {
         return arraylist;
     }
 
-    public int o() {
-        return this.m;
+    public int s() {
+        return this.q;
     }
 
     public MinecraftServer getServer() {
         return this.server;
     }
 
-    public NBTTagCompound q() {
+    public NBTTagCompound t() {
         return null;
     }
 
     private void a(EntityPlayer entityplayer, EntityPlayer entityplayer1, World world) {
         if (entityplayer1 != null) {
             entityplayer.playerInteractManager.setGameMode(entityplayer1.playerInteractManager.getGameMode());
-        } else if (this.n != null) {
-            entityplayer.playerInteractManager.setGameMode(this.n);
+        } else if (this.r != null) {
+            entityplayer.playerInteractManager.setGameMode(this.r);
         }
 
         entityplayer.playerInteractManager.b(world.getWorldData().getGameType());
     }
 
-    public void r() {
+    public void u() {
         for (int i = 0; i < this.players.size(); ++i) {
             ((EntityPlayer) this.players.get(i)).playerConnection.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
@@ -1132,20 +1174,32 @@ public abstract class PlayerList {
         this.sendMessage(ichatbasecomponent, true);
     }
 
-    public ServerStatisticManager i(String s) {
-        ServerStatisticManager serverstatisticmanager = (ServerStatisticManager) this.j.get(s);
+    public ServerStatisticManager a(EntityHuman entityhuman) {
+        UUID uuid = entityhuman.getUniqueID();
+        ServerStatisticManager serverstatisticmanager = uuid == null ? null : (ServerStatisticManager) this.n.get(uuid);
 
         if (serverstatisticmanager == null) {
-            serverstatisticmanager = new ServerStatisticManager(this.server, new File(this.server.getWorldServer(0).getDataManager().getDirectory(), "stats/" + s + ".json"));
+            File file1 = new File(this.server.getWorldServer(0).getDataManager().getDirectory(), "stats");
+            File file2 = new File(file1, uuid.toString() + ".json");
+
+            if (!file2.exists()) {
+                File file3 = new File(file1, entityhuman.getName() + ".json");
+
+                if (file3.exists() && file3.isFile()) {
+                    file3.renameTo(file2);
+                }
+            }
+
+            serverstatisticmanager = new ServerStatisticManager(this.server, file2);
             serverstatisticmanager.a();
-            this.j.put(s, serverstatisticmanager);
+            this.n.put(uuid, serverstatisticmanager);
         }
 
         return serverstatisticmanager;
     }
 
     public void a(int i) {
-        this.m = i;
+        this.q = i;
         if (this.server.worldServer != null) {
             WorldServer[] aworldserver = this.server.worldServer;
             int j = aworldserver.length;

src/main/java/net/minecraft/server/RegionFile.java

@@ -244,7 +244,7 @@ public class RegionFile {
                 }
             }
 
-            this.b(i, j, (int) (MinecraftServer.aq() / 1000L));
+            this.b(i, j, (int) (MinecraftServer.ar() / 1000L));
         } catch (IOException ioexception) {
             ioexception.printStackTrace();
         }

src/main/java/net/minecraft/server/ThreadCommandReader.java

@@ -39,7 +39,7 @@ class ThreadCommandReader extends Thread {
                 // CraftBukkit end
             }
         } catch (IOException ioexception) {
-            DedicatedServer.aA().error("Exception handling console input", ioexception);
+            DedicatedServer.aF().error("Exception handling console input", ioexception);
         }
     }
 }

src/main/java/net/minecraft/server/ThreadPlayerLookupUUID.java

@@ -1,6 +1,7 @@
 package net.minecraft.server;
 
 import java.math.BigInteger;
+import java.util.UUID;
 
 import net.minecraft.util.com.mojang.authlib.GameProfile;
 import net.minecraft.util.com.mojang.authlib.exceptions.AuthenticationUnavailableException;
@@ -21,20 +22,22 @@ class ThreadPlayerLookupUUID extends Thread {
     }
 
     public void run() {
-        try {
-            String s = (new BigInteger(MinecraftEncryption.a(LoginListener.a(this.a), LoginListener.b(this.a).J().getPublic(), LoginListener.c(this.a)))).toString(16);
+        GameProfile gameprofile = LoginListener.a(this.a);
 
-            LoginListener.a(this.a, LoginListener.b(this.a).at().hasJoinedServer(new GameProfile((String) null, LoginListener.d(this.a).getName()), s));
-            if (LoginListener.d(this.a) != null) {
+        try {
+            String s = (new BigInteger(MinecraftEncryption.a(LoginListener.b(this.a), LoginListener.c(this.a).K().getPublic(), LoginListener.d(this.a)))).toString(16);
+
+            LoginListener.a(this.a, LoginListener.c(this.a).av().hasJoinedServer(new GameProfile((UUID) null, gameprofile.getName()), s));
+            if (LoginListener.a(this.a) != null) {
                 // CraftBukkit start - fire PlayerPreLoginEvent
                 if (!this.a.networkManager.isConnected()) {
                     return;
                 }
 
-                String playerName = LoginListener.d(this.a).getName();
+                String playerName = LoginListener.a(this.a).getName();
                 java.net.InetAddress address = ((java.net.InetSocketAddress) a.networkManager.getSocketAddress()).getAddress();
-                java.util.UUID uniqueId = UtilUUID.b(LoginListener.d(this.a).getId());
-                final org.bukkit.craftbukkit.CraftServer server = LoginListener.b(this.a).server;
+                java.util.UUID uniqueId = LoginListener.a(this.a).getId();
+                final org.bukkit.craftbukkit.CraftServer server = LoginListener.c(this.a).server;
 
                 AsyncPlayerPreLoginEvent asyncEvent = new AsyncPlayerPreLoginEvent(playerName, address, uniqueId);
                 server.getPluginManager().callEvent(asyncEvent);
@@ -51,7 +54,7 @@ class ThreadPlayerLookupUUID extends Thread {
                             return event.getResult();
                         }};
 
-                    LoginListener.b(this.a).processQueue.add(waitable);
+                    LoginListener.c(this.a).processQueue.add(waitable);
                     if (waitable.get() != PlayerPreLoginEvent.Result.ALLOWED) {
                         this.a.disconnect(event.getKickMessage());
                         return;
@@ -64,19 +67,29 @@ class ThreadPlayerLookupUUID extends Thread {
                 }
                 // CraftBukkit end
 
-                LoginListener.e().info("UUID of player " + LoginListener.d(this.a).getName() + " is " + LoginListener.d(this.a).getId());
+                LoginListener.e().info("UUID of player " + LoginListener.a(this.a).getName() + " is " + LoginListener.a(this.a).getId());
+                LoginListener.a(this.a, EnumProtocolState.READY_TO_ACCEPT);
+            } else if (LoginListener.c(this.a).N()) {
+                LoginListener.e().warn("Failed to verify username but will let them in anyway!");
+                LoginListener.a(this.a, this.a.a(gameprofile));
                 LoginListener.a(this.a, EnumProtocolState.READY_TO_ACCEPT);
             } else {
                 this.a.disconnect("Failed to verify username!");
-                LoginListener.e().error("Username \'" + LoginListener.d(this.a).getName() + "\' tried to join with an invalid session");
+                LoginListener.e().error("Username \'" + LoginListener.a(this.a).getName() + "\' tried to join with an invalid session");
             }
         } catch (AuthenticationUnavailableException authenticationunavailableexception) {
-            this.a.disconnect("Authentication servers are down. Please try again later, sorry!");
-            LoginListener.e().error("Couldn\'t verify username because servers are unavailable");
+            if (LoginListener.c(this.a).N()) {
+                LoginListener.e().warn("Authentication servers are down but will let them in anyway!");
+                LoginListener.a(this.a, this.a.a(gameprofile));
+                LoginListener.a(this.a, EnumProtocolState.READY_TO_ACCEPT);
+            } else {
+                this.a.disconnect("Authentication servers are down. Please try again later, sorry!");
+                LoginListener.e().error("Couldn\'t verify username because servers are unavailable");
+            }
             // CraftBukkit start - catch all exceptions
         } catch (Exception exception) {
             this.a.disconnect("Failed to verify username!");
-            LoginListener.b(this.a).server.getLogger().log(java.util.logging.Level.WARNING, "Exception verifying " + LoginListener.d(this.a).getName(), exception);
+            LoginListener.c(this.a).server.getLogger().log(java.util.logging.Level.WARNING, "Exception verifying " + LoginListener.a(this.a).getName(), exception);
             // CraftBukkit end
         }
     }

src/main/java/net/minecraft/server/TileEntitySkull.java

@@ -1,10 +1,16 @@
 package net.minecraft.server;
 
+import java.util.UUID;
+
+import net.minecraft.util.com.google.common.collect.Iterables;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.properties.Property;
+
 public class TileEntitySkull extends TileEntity {
 
     private int a;
     private int i;
-    private String j = "";
+    private GameProfile j = null;
 
     public TileEntitySkull() {}
 
@@ -12,18 +18,32 @@ public class TileEntitySkull extends TileEntity {
         super.b(nbttagcompound);
         nbttagcompound.setByte("SkullType", (byte) (this.a & 255));
         nbttagcompound.setByte("Rot", (byte) (this.i & 255));
-        nbttagcompound.setString("ExtraType", this.j);
+        if (this.j != null) {
+            NBTTagCompound nbttagcompound1 = new NBTTagCompound();
+
+            GameProfileSerializer.a(nbttagcompound1, this.j);
+            nbttagcompound.set("Owner", nbttagcompound1);
+        }
     }
 
     public void a(NBTTagCompound nbttagcompound) {
         super.a(nbttagcompound);
         this.a = nbttagcompound.getByte("SkullType");
         this.i = nbttagcompound.getByte("Rot");
-        if (nbttagcompound.hasKeyOfType("ExtraType", 8)) {
-            this.j = nbttagcompound.getString("ExtraType");
+        if (this.a == 3) {
+            if (nbttagcompound.hasKeyOfType("Owner", 10)) {
+                this.j = GameProfileSerializer.a(nbttagcompound.getCompound("Owner"));
+            } else if (nbttagcompound.hasKeyOfType("ExtraType", 8) && !UtilColor.b(nbttagcompound.getString("ExtraType"))) {
+                this.j = new GameProfile((UUID) null, nbttagcompound.getString("ExtraType"));
+                this.d();
+            }
         }
     }
 
+    public GameProfile getGameProfile() {
+        return this.j;
+    }
+
     public Packet getUpdatePacket() {
         NBTTagCompound nbttagcompound = new NBTTagCompound();
 
@@ -31,9 +51,34 @@ public class TileEntitySkull extends TileEntity {
         return new PacketPlayOutTileEntityData(this.x, this.y, this.z, 4, nbttagcompound);
     }
 
-    public void setSkullType(int i, String s) {
+    public void setSkullType(int i) {
         this.a = i;
-        this.j = s;
+        this.j = null;
+    }
+
+    public void setGameProfile(GameProfile gameprofile) {
+        this.a = 3;
+        this.j = gameprofile;
+        this.d();
+    }
+
+    private void d() {
+        if (this.j != null && !UtilColor.b(this.j.getName())) {
+            if (!this.j.isComplete() || !this.j.getProperties().containsKey("textures")) {
+                GameProfile gameprofile = MinecraftServer.getServer().getUserCache().a(this.j.getName());
+
+                if (gameprofile != null) {
+                    Property property = (Property) Iterables.getFirst(gameprofile.getProperties().get("textures"), null);
+
+                    if (property == null) {
+                        gameprofile = MinecraftServer.getServer().av().fillProfileProperties(gameprofile, true);
+                    }
+
+                    this.j = gameprofile;
+                    this.update();
+                }
+            }
+        }
     }
 
     public int getSkullType() {
@@ -49,8 +94,4 @@ public class TileEntitySkull extends TileEntity {
         return this.i;
     }
     // CraftBukkit end
-
-    public String getExtraType() {
-        return this.j;
-    }
 }

src/main/java/net/minecraft/server/World.java

@@ -8,6 +8,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Random;
 import java.util.Set;
+import java.util.UUID;
 import java.util.concurrent.Callable;
 
 // CraftBukkit start
@@ -2532,8 +2533,22 @@ public abstract class World implements IBlockAccess {
 
     public EntityHuman a(String s) {
         for (int i = 0; i < this.players.size(); ++i) {
-            if (s.equals(((EntityHuman) this.players.get(i)).getName())) {
-                return (EntityHuman) this.players.get(i);
+            EntityHuman entityhuman = (EntityHuman) this.players.get(i);
+
+            if (s.equals(entityhuman.getName())) {
+                return entityhuman;
+            }
+        }
+
+        return null;
+    }
+
+    public EntityHuman a(UUID uuid) {
+        for (int i = 0; i < this.players.size(); ++i) {
+            EntityHuman entityhuman = (EntityHuman) this.players.get(i);
+
+            if (uuid.equals(entityhuman.getUniqueID())) {
+                return entityhuman;
             }
         }
 
@@ -2726,7 +2741,7 @@ public abstract class World implements IBlockAccess {
 
     public Calendar V() {
         if (this.getTime() % 600L == 0L) {
-            this.J.setTimeInMillis(MinecraftServer.aq());
+            this.J.setTimeInMillis(MinecraftServer.ar());
         }
 
         return this.J;

src/main/java/net/minecraft/server/WorldNBTStorage.java

@@ -24,14 +24,14 @@ public class WorldNBTStorage implements IDataManager, IPlayerFileData {
     private final File baseDir;
     private final File playerDir;
     private final File dataDir;
-    private final long sessionId = MinecraftServer.aq();
+    private final long sessionId = MinecraftServer.ar();
     private final String f;
     private UUID uuid = null; // CraftBukkit
 
     public WorldNBTStorage(File file1, String s, boolean flag) {
         this.baseDir = new File(file1, s);
         this.baseDir.mkdirs();
-        this.playerDir = new File(this.baseDir, "players");
+        this.playerDir = new File(this.baseDir, "playerdata");
         this.dataDir = new File(this.baseDir, "data");
         this.dataDir.mkdirs();
         this.f = s;
@@ -177,8 +177,8 @@ public class WorldNBTStorage implements IDataManager, IPlayerFileData {
             NBTTagCompound nbttagcompound = new NBTTagCompound();
 
             entityhuman.e(nbttagcompound);
-            File file1 = new File(this.playerDir, entityhuman.getName() + ".dat.tmp");
-            File file2 = new File(this.playerDir, entityhuman.getName() + ".dat");
+            File file1 = new File(this.playerDir, entityhuman.getUniqueID().toString() + ".dat.tmp");
+            File file2 = new File(this.playerDir, entityhuman.getUniqueID().toString() + ".dat");
 
             NBTCompressedStreamTools.a(nbttagcompound, (OutputStream) (new FileOutputStream(file1)));
             if (file2.exists()) {
@@ -192,7 +192,17 @@ public class WorldNBTStorage implements IDataManager, IPlayerFileData {
     }
 
     public NBTTagCompound load(EntityHuman entityhuman) {
-        NBTTagCompound nbttagcompound = this.getPlayerData(entityhuman.getName());
+        NBTTagCompound nbttagcompound = null;
+
+        try {
+            File file1 = new File(this.playerDir, entityhuman.getUniqueID().toString() + ".dat");
+
+            if (file1.exists() && file1.isFile()) {
+                nbttagcompound = NBTCompressedStreamTools.a((InputStream) (new FileInputStream(file1)));
+            }
+        } catch (Exception exception) {
+            a.warn("Failed to load player data for " + entityhuman.getName());
+        }
 
         if (nbttagcompound != null) {
             // CraftBukkit start
@@ -201,6 +211,7 @@ public class WorldNBTStorage implements IDataManager, IPlayerFileData {
                 player.setFirstPlayed(new File(playerDir, entityhuman.getName() + ".dat").lastModified());
             }
             // CraftBukkit end
+
             entityhuman.f(nbttagcompound);
         }
 

src/main/java/net/minecraft/server/WorldServer.java

@@ -9,6 +9,7 @@ import java.util.Random;
 import java.util.Set;
 import java.util.TreeSet;
 
+import net.minecraft.util.com.google.common.collect.Lists;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
@@ -765,14 +766,14 @@ public class WorldServer extends World implements org.bukkit.BlockChangeDelegate
             }
 
             this.chunkProvider.saveChunks(flag, iprogressupdate);
-            // CraftBukkit - List -> Collection
-            Collection list = this.chunkProviderServer.a();
-            Iterator iterator = list.iterator();
+            // CraftBukkit - ArrayList -> Collection
+            Collection arraylist = this.chunkProviderServer.a();
+            Iterator iterator = arraylist.iterator();
 
             while (iterator.hasNext()) {
                 Chunk chunk = (Chunk) iterator.next();
 
-                if (!this.manager.a(chunk.locX, chunk.locZ)) {
+                if (chunk != null && !this.manager.a(chunk.locX, chunk.locZ)) {
                     this.chunkProviderServer.queueUnload(chunk.locX, chunk.locZ);
                 }
             }
@@ -787,7 +788,7 @@ public class WorldServer extends World implements org.bukkit.BlockChangeDelegate
 
     protected void a() throws ExceptionWorldConflict { // CraftBukkit - added throws
         this.G();
-        this.dataManager.saveWorldData(this.worldData, this.server.getPlayerList().q());
+        this.dataManager.saveWorldData(this.worldData, this.server.getPlayerList().t());
         // CraftBukkit start - save worldMaps once, rather than once per shared world
         if (!(this instanceof SecondaryWorldServer)) {
             this.worldMaps.a();
@@ -961,7 +962,7 @@ public class WorldServer extends World implements org.bukkit.BlockChangeDelegate
     }
 
     protected int p() {
-        return this.server.getPlayerList().o();
+        return this.server.getPlayerList().s();
     }
 
     public MinecraftServer getMinecraftServer() {

src/main/java/org/bukkit/craftbukkit/CraftIpBanEntry.java

@@ -1,21 +1,21 @@
 package org.bukkit.craftbukkit;
 
+import net.minecraft.server.IpBanEntry;
+import net.minecraft.server.IpBanList;
+
 import java.util.Date;
 
-import net.minecraft.server.BanEntry;
-import net.minecraft.server.BanList;
-
-public final class CraftBanEntry implements org.bukkit.BanEntry {
-    private final BanList list;
-    private final String name;
+public final class CraftIpBanEntry implements org.bukkit.BanEntry {
+    private final IpBanList list;
+    private final String target;
     private Date created;
     private String source;
     private Date expiration;
     private String reason;
 
-    public CraftBanEntry(BanEntry entry, BanList list) {
+    public CraftIpBanEntry(String target, IpBanEntry entry, IpBanList list) {
         this.list = list;
-        this.name = entry.getName();
+        this.target = target;
         this.created = entry.getCreated() != null ? new Date(entry.getCreated().getTime()) : null;
         this.source = entry.getSource();
         this.expiration = entry.getExpires() != null ? new Date(entry.getExpires().getTime()) : null;
@@ -24,7 +24,7 @@ public final class CraftBanEntry implements org.bukkit.BanEntry {
 
     @Override
     public String getTarget() {
-        return this.name;
+        return this.target;
     }
 
     @Override
@@ -73,14 +73,8 @@ public final class CraftBanEntry implements org.bukkit.BanEntry {
 
     @Override
     public void save() {
-        BanEntry entry = new BanEntry(this.name);
-        entry.setCreated(this.created);
-        entry.setSource(this.source);
-        entry.setExpires(this.expiration);
-        entry.setReason(this.reason);
-
+        IpBanEntry entry = new IpBanEntry(target, this.created, this.source, this.expiration, this.reason);
         this.list.add(entry);
         this.list.save();
     }
-
 }

src/main/java/org/bukkit/craftbukkit/CraftIpBanList.java

@@ -1,21 +1,20 @@
 package org.bukkit.craftbukkit;
 
-import java.util.Collection;
+import java.net.InetSocketAddress;
 import java.util.Date;
 import java.util.Set;
 
+import net.minecraft.server.IpBanEntry;
+import net.minecraft.server.IpBanList;
 import org.apache.commons.lang.StringUtils;
 import org.apache.commons.lang.Validate;
 
 import com.google.common.collect.ImmutableSet;
 
-import net.minecraft.server.BanEntry;
-import net.minecraft.server.BanList;
+public class CraftIpBanList implements org.bukkit.BanList {
+    private final IpBanList list;
 
-public class CraftBanList implements org.bukkit.BanList {
-    private final BanList list;
-
-    public CraftBanList(BanList list){
+    public CraftIpBanList(IpBanList list) {
         this.list = list;
     }
 
@@ -23,33 +22,34 @@ public class CraftBanList implements org.bukkit.BanList {
     public org.bukkit.BanEntry getBanEntry(String target) {
         Validate.notNull(target, "Target cannot be null");
 
-        if (!list.getEntries().containsKey(target)) {
+        IpBanEntry entry = (IpBanEntry) list.get(target);
+        if (entry == null) {
             return null;
         }
 
-        return new CraftBanEntry((BanEntry) list.getEntries().get(target), list);
+        return new CraftIpBanEntry(target, entry, list);
     }
 
     @Override
     public org.bukkit.BanEntry addBan(String target, String reason, Date expires, String source) {
         Validate.notNull(target, "Ban target cannot be null");
 
-        BanEntry entry = new BanEntry(target);
-        entry.setSource(StringUtils.isBlank(source) ? entry.getSource() : source); // Use default if null/empty
-        entry.setExpires(expires); // Null values are interpreted as "forever"
-        entry.setReason(StringUtils.isBlank(reason) ? entry.getReason() : reason); // Use default if null/empty
+        IpBanEntry entry = new IpBanEntry(target, new Date(),
+                StringUtils.isBlank(source) ? null : source, expires,
+                StringUtils.isBlank(reason) ? null : reason);
 
         list.add(entry);
         list.save();
-        return new CraftBanEntry(entry, list);
+        return new CraftIpBanEntry(target, entry, list);
     }
 
     @Override
     public Set<org.bukkit.BanEntry> getBanEntries() {
         ImmutableSet.Builder<org.bukkit.BanEntry> builder = ImmutableSet.builder();
-        for (BanEntry entry : (Collection<BanEntry>) list.getEntries().values()) {
-            builder.add(new CraftBanEntry(entry, list));
+        for (String target : list.getEntries()) {
+            builder.add(new CraftIpBanEntry(target, (IpBanEntry) list.get(target), list));
         }
+
         return builder.build();
     }
 
@@ -57,7 +57,7 @@ public class CraftBanList implements org.bukkit.BanList {
     public boolean isBanned(String target) {
         Validate.notNull(target, "Target cannot be null");
 
-        return list.isBanned(target);
+        return list.isBanned(InetSocketAddress.createUnresolved(target, 0));
     }
 
     @Override
@@ -66,5 +66,4 @@ public class CraftBanList implements org.bukkit.BanList {
 
         list.remove(target);
     }
-
 }

src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java

@@ -6,11 +6,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
-import net.minecraft.server.BanEntry;
 import net.minecraft.server.EntityPlayer;
 import net.minecraft.server.NBTTagCompound;
 import net.minecraft.server.WorldNBTStorage;
 
+import net.minecraft.util.com.mojang.authlib.GameProfile;
 import org.bukkit.BanList;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -24,14 +24,19 @@ import org.bukkit.plugin.Plugin;
 
 @SerializableAs("Player")
 public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializable {
-    private final String name;
+    private final GameProfile profile;
     private final CraftServer server;
     private final WorldNBTStorage storage;
 
-    protected CraftOfflinePlayer(CraftServer server, String name) {
+    protected CraftOfflinePlayer(CraftServer server, GameProfile profile) {
         this.server = server;
-        this.name = name;
+        this.profile = profile;
         this.storage = (WorldNBTStorage) (server.console.worlds.get(0).getDataManager());
+
+    }
+
+    public GameProfile getProfile() {
+        return profile;
     }
 
     public boolean isOnline() {
@@ -39,86 +44,96 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
     }
 
     public String getName() {
-        return name;
-    }
-
-    // TODO: In 1.7.6+ OfflinePlayer lookup should be by UUID and store it like it does the name now
-    public UUID getUniqueId() {
-        NBTTagCompound data = getData();
-        if (data == null) {
-            return null;
+        Player player = getPlayer();
+        if (player != null) {
+            return player.getName();
         }
 
-        if (data.hasKeyOfType("UUIDMost", 4) && data.hasKeyOfType("UUIDLeast", 4)) {
-            return new UUID(data.getLong("UUIDMost"), data.getLong("UUIDLeast"));
+        NBTTagCompound data = getBukkitData();
+
+        if (data != null) {
+            if (data.hasKey("lastKnownName")) {
+                return data.getString("lastKnownName");
+            }
         }
 
         return null;
     }
 
+    public UUID getUniqueId() {
+        return profile.getId();
+    }
+
     public Server getServer() {
         return server;
     }
 
     public boolean isOp() {
-        return server.getHandle().isOp(getName().toLowerCase());
+        return server.getHandle().isOp(profile);
     }
 
     public void setOp(boolean value) {
-        if (value == isOp()) return;
+        if (value == isOp()) {
+            return;
+        }
 
         if (value) {
-            server.getHandle().addOp(getName().toLowerCase());
+            server.getHandle().addOp(profile);
         } else {
-            server.getHandle().removeOp(getName().toLowerCase());
+            server.getHandle().removeOp(profile);
         }
     }
 
     public boolean isBanned() {
-        return server.getBanList(BanList.Type.NAME).isBanned(getName());
+        return server.getBanList(BanList.Type.UUID).isBanned(getUniqueId().toString());
     }
 
     public void setBanned(boolean value) {
         if (value) {
-            server.getBanList(BanList.Type.NAME).addBan(getName(), null, null, null);
+            server.getBanList(BanList.Type.UUID).addBan(getUniqueId().toString(), null, null, null);
         } else {
-            server.getBanList(BanList.Type.NAME).pardon(getName());
+            server.getBanList(BanList.Type.UUID).pardon(getUniqueId().toString());
         }
     }
 
     public boolean isWhitelisted() {
-        return server.getHandle().getWhitelisted().contains(name.toLowerCase());
+        return server.getHandle().isWhitelisted(profile);
     }
 
     public void setWhitelisted(boolean value) {
         if (value) {
-            server.getHandle().addWhitelist(name.toLowerCase());
+            server.getHandle().addWhitelist(profile);
         } else {
-            server.getHandle().removeWhitelist(name.toLowerCase());
+            server.getHandle().removeWhitelist(profile);
         }
     }
 
     public Map<String, Object> serialize() {
         Map<String, Object> result = new LinkedHashMap<String, Object>();
 
-        result.put("name", name);
+        result.put("UUID", profile.getId().toString());
 
         return result;
     }
 
     public static OfflinePlayer deserialize(Map<String, Object> args) {
-        return Bukkit.getServer().getOfflinePlayer((String) args.get("name"));
+        // Backwards comparability
+        if (args.get("name") != null) {
+            return Bukkit.getServer().getOfflinePlayer((String) args.get("name"));
+        }
+
+        return Bukkit.getServer().getOfflinePlayer(UUID.fromString((String) args.get("UUID")));
     }
 
     @Override
     public String toString() {
-        return getClass().getSimpleName() + "[name=" + name + "]";
+        return getClass().getSimpleName() + "[UUID=" + profile.getId() + "]";
     }
 
     public Player getPlayer() {
         for (Object obj : server.getHandle().players) {
             EntityPlayer player = (EntityPlayer) obj;
-            if (player.getName().equalsIgnoreCase(getName())) {
+            if (player.getUniqueID().equals(getUniqueId())) {
                 return (player.playerConnection != null) ? player.playerConnection.getPlayer() : null;
             }
         }
@@ -128,28 +143,27 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
 
     @Override
     public boolean equals(Object obj) {
-        if (obj == null) {
-            return false;
-        }
-        if (!(obj instanceof OfflinePlayer)) {
+        if (obj == null || !(obj instanceof OfflinePlayer)) {
             return false;
         }
+
         OfflinePlayer other = (OfflinePlayer) obj;
-        if ((this.getName() == null) || (other.getName() == null)) {
+        if ((this.getUniqueId() == null) || (other.getUniqueId() == null)) {
             return false;
         }
-        return this.getName().equalsIgnoreCase(other.getName());
+
+        return this.getUniqueId().equals(other.getUniqueId());
     }
 
     @Override
     public int hashCode() {
         int hash = 5;
-        hash = 97 * hash + (this.getName() != null ? this.getName().toLowerCase().hashCode() : 0);
+        hash = 97 * hash + (this.getUniqueId() != null ? this.getUniqueId().toString().hashCode() : 0);
         return hash;
     }
 
     private NBTTagCompound getData() {
-        return storage.getPlayerData(getName());
+        return storage.getPlayerData(getUniqueId().toString());
     }
 
     private NBTTagCompound getBukkitData() {
@@ -166,7 +180,7 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa
     }
 
     private File getDataFile() {
-        return new File(storage.getPlayerDir(), name + ".dat");
+        return new File(storage.getPlayerDir(), getUniqueId() + ".dat");
     }
 
     public long getFirstPlayed() {

src/main/java/org/bukkit/craftbukkit/CraftProfileBanEntry.java

@@ -0,0 +1,81 @@
+package org.bukkit.craftbukkit;
+
+import net.minecraft.server.GameProfileBanEntry;
+import net.minecraft.server.GameProfileBanList;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+
+import java.util.Date;
+
+public final class CraftProfileBanEntry implements org.bukkit.BanEntry {
+    private final GameProfileBanList list;
+    private final GameProfile profile;
+    private Date created;
+    private String source;
+    private Date expiration;
+    private String reason;
+
+    public CraftProfileBanEntry(GameProfile profile, GameProfileBanEntry entry, GameProfileBanList list) {
+        this.list = list;
+        this.profile = profile;
+        this.created = entry.getCreated() != null ? new Date(entry.getCreated().getTime()) : null;
+        this.source = entry.getSource();
+        this.expiration = entry.getExpires() != null ? new Date(entry.getExpires().getTime()) : null;
+        this.reason = entry.getReason();
+    }
+
+    @Override
+    public String getTarget() {
+        return this.profile.getId().toString();
+    }
+
+    @Override
+    public Date getCreated() {
+        return this.created == null ? null : (Date) this.created.clone();
+    }
+
+    @Override
+    public void setCreated(Date created) {
+        this.created = created;
+    }
+
+    @Override
+    public String getSource() {
+        return this.source;
+    }
+
+    @Override
+    public void setSource(String source) {
+        this.source = source;
+    }
+
+    @Override
+    public Date getExpiration() {
+        return this.expiration == null ? null : (Date) this.expiration.clone();
+    }
+
+    @Override
+    public void setExpiration(Date expiration) {
+        if (expiration != null && expiration.getTime() == new Date(0, 0, 0, 0, 0, 0).getTime()) {
+            expiration = null; // Forces "forever"
+        }
+
+        this.expiration = expiration;
+    }
+
+    @Override
+    public String getReason() {
+        return this.reason;
+    }
+
+    @Override
+    public void setReason(String reason) {
+        this.reason = reason;
+    }
+
+    @Override
+    public void save() {
+        GameProfileBanEntry entry = new GameProfileBanEntry(profile, this.created, this.source, this.expiration, this.reason);
+        this.list.add(entry);
+        this.list.save();
+    }
+}

src/main/java/org/bukkit/craftbukkit/CraftProfileBanList.java

@@ -0,0 +1,86 @@
+package org.bukkit.craftbukkit;
+
+import java.util.Date;
+import java.util.Set;
+import java.util.UUID;
+
+import net.minecraft.server.GameProfileBanEntry;
+import net.minecraft.server.GameProfileBanList;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang.Validate;
+
+import com.google.common.collect.ImmutableSet;
+
+public class CraftProfileBanList implements org.bukkit.BanList {
+    private final GameProfileBanList list;
+
+    public CraftProfileBanList(GameProfileBanList list){
+        this.list = list;
+    }
+
+    @Override
+    public org.bukkit.BanEntry getBanEntry(String target) {
+        Validate.notNull(target, "Target cannot be null");
+
+        UUID id = UUID.fromString(target);
+        GameProfile profile = new GameProfile(id, null);
+
+        GameProfileBanEntry entry = (GameProfileBanEntry) list.get(profile);
+        if (entry == null) {
+            return null;
+        }
+
+        return new CraftProfileBanEntry(profile, entry, list);
+    }
+
+    @Override
+    public org.bukkit.BanEntry addBan(String target, String reason, Date expires, String source) {
+        Validate.notNull(target, "Ban target cannot be null");
+
+        UUID id = UUID.fromString(target);
+        GameProfile profile = new GameProfile(id, null);
+
+        GameProfileBanEntry entry = new GameProfileBanEntry(profile, new Date(),
+                StringUtils.isBlank(source) ? null : source, expires,
+                StringUtils.isBlank(reason) ? null : reason);
+
+        list.add(entry);
+        list.save();
+        return new CraftProfileBanEntry(profile, entry, list);
+    }
+
+    @Override
+    public Set<org.bukkit.BanEntry> getBanEntries() {
+        ImmutableSet.Builder<org.bukkit.BanEntry> builder = ImmutableSet.builder();
+        for (String target : list.getEntries()) {
+            UUID id = UUID.fromString(target);
+            GameProfile profile = new GameProfile(id, null);
+
+            builder.add(new CraftProfileBanEntry(profile, (GameProfileBanEntry) list.get(profile), list));
+        }
+
+        return builder.build();
+    }
+
+    @Override
+    public boolean isBanned(String target) {
+        Validate.notNull(target, "Target cannot be null");
+
+        UUID id = UUID.fromString(target);
+        GameProfile profile = new GameProfile(id, null);
+
+        return list.isBanned(profile);
+    }
+
+    @Override
+    public void pardon(String target) {
+        Validate.notNull(target, "Target cannot be null");
+
+        UUID id = UUID.fromString(target);
+        GameProfile profile = new GameProfile(id, null);
+
+        list.remove(profile);
+    }
+}

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -15,7 +15,6 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.UUID;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -92,6 +91,7 @@ import net.minecraft.server.WorldServer;
 import net.minecraft.server.WorldSettings;
 import net.minecraft.server.WorldType;
 import net.minecraft.util.com.google.common.base.Charsets;
+import net.minecraft.util.com.mojang.authlib.GameProfile;
 import net.minecraft.util.io.netty.buffer.ByteBuf;
 import net.minecraft.util.io.netty.buffer.ByteBufOutputStream;
 import net.minecraft.util.io.netty.buffer.Unpooled;
@@ -204,7 +204,7 @@ public final class CraftServer implements Server {
     private YamlConfiguration configuration;
     private YamlConfiguration commandsConfiguration;
     private final Yaml yaml = new Yaml(new SafeConstructor());
-    private final Map<String, OfflinePlayer> offlinePlayers = new MapMaker().softValues().makeMap();
+    private final Map<java.util.UUID, OfflinePlayer> offlinePlayers = new MapMaker().softValues().makeMap();
     private final AutoUpdater updater;
     private final EntityMetadataStore entityMetadata = new EntityMetadataStore();
     private final PlayerMetadataStore playerMetadata = new PlayerMetadataStore();
@@ -514,7 +514,7 @@ public final class CraftServer implements Server {
     }
 
     // TODO: In 1.7.6+ this should use the server's UUID->EntityPlayer map
-    public Player getPlayer(UUID id) {
+    public Player getPlayer(java.util.UUID id) {
         for (Player player : getOnlinePlayers()) {
             if (player.getUniqueId().equals(id)) {
                 return player;
@@ -734,7 +734,7 @@ public final class CraftServer implements Server {
         loadIcon();
 
         playerList.getIPBans().load();
-        playerList.getNameBans().load();
+        playerList.getProfileBans().load();
 
         for (WorldServer world : console.worlds) {
             world.difficulty = difficulty;
@@ -1013,7 +1013,7 @@ public final class CraftServer implements Server {
         return worlds.get(name.toLowerCase());
     }
 
-    public World getWorld(UUID uid) {
+    public World getWorld(java.util.UUID uid) {
         for (World world : worlds.values()) {
             if (world.getUID().equals(uid)) {
                 return world;
@@ -1258,54 +1258,44 @@ public final class CraftServer implements Server {
     }
 
     public OfflinePlayer getOfflinePlayer(String name) {
-        return getOfflinePlayer(name, true);
-    }
-
-    public OfflinePlayer getOfflinePlayer(String name, boolean search) {
         Validate.notNull(name, "Name cannot be null");
 
-        OfflinePlayer result = getPlayerExact(name);
-        String lname = name.toLowerCase();
+        // This is potentially blocking :(
+        GameProfile profile = MinecraftServer.getServer().getUserCache().a(name);
+        if (profile == null) {
+            // Make an OfflinePlayer using an offline mode UUID since the name has no profile
+            return getOfflinePlayer(new GameProfile(java.util.UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(Charsets.UTF_8)), name));
+        }
 
+        return getOfflinePlayer(profile.getId());
+    }
+
+    public OfflinePlayer getOfflinePlayer(java.util.UUID id) {
+        Validate.notNull(id, "UUID cannot be null");
+
+        OfflinePlayer result = getPlayer(id);
         if (result == null) {
-            result = offlinePlayers.get(lname);
-
+            result = offlinePlayers.get(id);
             if (result == null) {
-                if (search) {
-                    WorldNBTStorage storage = (WorldNBTStorage) console.worlds.get(0).getDataManager();
-                    for (String dat : storage.getPlayerDir().list(new DatFileFilter())) {
-                        String datName = dat.substring(0, dat.length() - 4);
-                        if (datName.equalsIgnoreCase(name)) {
-                            name = datName;
-                            break;
-                        }
-                    }
-                }
-
-                result = new CraftOfflinePlayer(this, name);
-                offlinePlayers.put(lname, result);
+                result = new CraftOfflinePlayer(this, new GameProfile(id, null));
+                offlinePlayers.put(id, result);
             }
         } else {
-            offlinePlayers.remove(lname);
+            offlinePlayers.remove(id);
         }
 
         return result;
     }
 
-    // TODO: In 1.7.6+ this should just lookup the UUID-based player data filename
-    public OfflinePlayer getOfflinePlayer(UUID id) {
-        String name = MojangNameLookup.lookupName(id);
-        if (name == null) {
-            // This is completely wrong
-            name = "InvalidUUID";
-        }
-
-        return getOfflinePlayer(name);
+    public OfflinePlayer getOfflinePlayer(GameProfile profile) {
+        OfflinePlayer player = new CraftOfflinePlayer(this, profile);
+        offlinePlayers.put(profile.getId(), player);
+        return player;
     }
 
     @SuppressWarnings("unchecked")
     public Set<String> getIPBans() {
-        return new HashSet<String>(playerList.getIPBans().getEntries().keySet());
+        return new HashSet<String>(Arrays.asList(playerList.getIPBans().getEntries()));
     }
 
     public void banIP(String address) {
@@ -1323,28 +1313,34 @@ public final class CraftServer implements Server {
     public Set<OfflinePlayer> getBannedPlayers() {
         Set<OfflinePlayer> result = new HashSet<OfflinePlayer>();
 
-        for (Object name : playerList.getNameBans().getEntries().keySet()) {
-            result.add(getOfflinePlayer((String) name));
+        for (String id : playerList.getProfileBans().getEntries()) {
+            try {
+                result.add(getOfflinePlayer(java.util.UUID.fromString(id)));
+            } catch (IllegalArgumentException ex) {
+                // This shouldn't happen
+            }
         }
 
         return result;
     }
 
     @Override
-    public BanList getBanList(BanList.Type type){
+    public BanList getBanList(BanList.Type type) {
         Validate.notNull(type, "Type cannot be null");
 
         switch(type){
         case IP:
-            return new CraftBanList(playerList.getIPBans());
+            return new CraftIpBanList(playerList.getIPBans());
         case NAME:
-        default: // Fall through as a player name list for safety
-            return new CraftBanList(playerList.getNameBans());
+            return null;
+        case UUID:
+        default:
+            return new CraftProfileBanList(playerList.getProfileBans());
         }
     }
 
     public void setWhitelist(boolean value) {
-        playerList.hasWhitelist = value;
+        playerList.setHasWhitelist(value);
         console.getPropertyManager().a("white-list", value);
     }
 
@@ -1364,8 +1360,12 @@ public final class CraftServer implements Server {
     public Set<OfflinePlayer> getOperators() {
         Set<OfflinePlayer> result = new HashSet<OfflinePlayer>();
 
-        for (Object name : playerList.getOPs()) {
-            result.add(getOfflinePlayer((String) name));
+        for (String id : playerList.getOPs().getEntries()) {
+            try {
+                result.add(getOfflinePlayer(java.util.UUID.fromString(id)));
+            } catch (IllegalArgumentException ex) {
+                // This shouldn't ever happen
+            }
         }
 
         return result;
@@ -1442,8 +1442,13 @@ public final class CraftServer implements Server {
         Set<OfflinePlayer> players = new HashSet<OfflinePlayer>();
 
         for (String file : files) {
-            players.add(getOfflinePlayer(file.substring(0, file.length() - 4), false));
+            try {
+                players.add(getOfflinePlayer(java.util.UUID.fromString(file.substring(0, file.length() - 4))));
+            } catch (IllegalArgumentException ex) {
+                // Who knows what is in this directory, just ignore invalid files
+            }
         }
+
         players.addAll(Arrays.asList(getOnlinePlayers()));
 
         return players.toArray(new OfflinePlayer[players.size()]);

src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java

@@ -10,6 +10,7 @@ import net.minecraft.server.BlockCocoa;
 import net.minecraft.server.BlockRedstoneWire;
 import net.minecraft.server.Blocks;
 import net.minecraft.server.EnumSkyBlock;
+import net.minecraft.server.GameProfileSerializer;
 import net.minecraft.server.Item;
 import net.minecraft.server.NBTTagCompound;
 import net.minecraft.server.TileEntitySkull;
@@ -423,9 +424,12 @@ public class CraftBlock implements Block {
                         net.minecraft.server.ItemStack nmsStack = new net.minecraft.server.ItemStack(item, 1, block.getDropData(chunk.getHandle().world, x, y, z));
                         TileEntitySkull tileentityskull = (TileEntitySkull) chunk.getHandle().world.getTileEntity(x, y, z);
 
-                        if (tileentityskull.getSkullType() == 3 && tileentityskull.getExtraType() != null && tileentityskull.getExtraType().length() > 0) {
+                        if (tileentityskull.getSkullType() == 3 && tileentityskull.getGameProfile() != null) {
                             nmsStack.setTag(new NBTTagCompound());
-                            nmsStack.getTag().setString("SkullOwner", tileentityskull.getExtraType());
+                            NBTTagCompound nbttagcompound = new NBTTagCompound();
+
+                            GameProfileSerializer.a(nbttagcompound, tileentityskull.getGameProfile());
+                            nmsStack.getTag().set("SkullOwner", nbttagcompound);
                         }
 
                         drops.add(CraftItemStack.asBukkitCopy(nmsStack));

src/main/java/org/bukkit/craftbukkit/block/CraftSkull.java

@@ -1,28 +1,30 @@
 package org.bukkit.craftbukkit.block;
 
-import com.google.common.base.Strings;
-
+import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.TileEntitySkull;
 
+import net.minecraft.util.com.mojang.authlib.GameProfile;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.SkullType;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.block.Skull;
+import org.bukkit.craftbukkit.CraftOfflinePlayer;
 import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
 
 public class CraftSkull extends CraftBlockState implements Skull {
     private final TileEntitySkull skull;
-    private String player;
+    private GameProfile profile;
     private SkullType skullType;
     private byte rotation;
-    private final int MAX_OWNER_LENGTH = 16;
 
     public CraftSkull(final Block block) {
         super(block);
 
         CraftWorld world = (CraftWorld) block.getWorld();
         skull = (TileEntitySkull) world.getTileEntityAt(getX(), getY(), getZ());
-        player = skull.getExtraType();
+        profile = skull.getGameProfile();
         skullType = getSkullType(skull.getSkullType());
         rotation = (byte) skull.getRotation();
     }
@@ -140,23 +142,36 @@ public class CraftSkull extends CraftBlockState implements Skull {
     }
 
     public boolean hasOwner() {
-        return !Strings.isNullOrEmpty(player);
+        return profile != null;
     }
 
     public String getOwner() {
-        return player;
+        return profile.getName();
     }
 
     public boolean setOwner(String name) {
-        if (name == null || name.length() > MAX_OWNER_LENGTH) {
+        return false;
+    }
+
+    public OfflinePlayer getPlayer() {
+        return MinecraftServer.getServer().server.getOfflinePlayer(profile);
+    }
+
+    public boolean setPlayer(OfflinePlayer player) {
+        GameProfile profile;
+        if (player instanceof CraftPlayer) {
+            profile = ((CraftPlayer) player).getProfile();
+        } else if (player instanceof CraftOfflinePlayer) {
+            profile = ((CraftOfflinePlayer) player).getProfile();
+        } else {
             return false;
         }
-        player = name;
 
-        if (skullType != SkullType.PLAYER) {
-            skullType = SkullType.PLAYER;
+        if (profile == null) {
+            return false;
         }
 
+        this.profile = profile;
         return true;
     }
 
@@ -176,7 +191,7 @@ public class CraftSkull extends CraftBlockState implements Skull {
         this.skullType = skullType;
 
         if (skullType != SkullType.PLAYER) {
-            player = "";
+            profile = null;
         }
     }
 
@@ -185,7 +200,8 @@ public class CraftSkull extends CraftBlockState implements Skull {
         boolean result = super.update(force, applyPhysics);
 
         if (result) {
-            skull.setSkullType(getSkullType(skullType), player);
+            skull.setSkullType(getSkullType(skullType));
+            skull.setGameProfile(profile);
             skull.setRotation(rotation);
             skull.update();
         }

src/main/java/org/bukkit/craftbukkit/entity/CraftHorse.java

@@ -9,6 +9,8 @@ import org.bukkit.entity.EntityType;
 import org.bukkit.entity.Horse;
 import org.bukkit.inventory.HorseInventory;
 
+import java.util.UUID;
+
 public class CraftHorse extends CraftAnimals implements Horse {
 
     public CraftHorse(CraftServer server, EntityHorse entity) {
@@ -97,28 +99,36 @@ public class CraftHorse extends CraftAnimals implements Horse {
 
     @Override
     public AnimalTamer getOwner() {
-        if (getOwnerName() == null || "".equals(getOwnerName())) return null;
-        return getServer().getOfflinePlayer(getOwnerName());
+        if (getOwnerUUID() == null) return null;
+        return getServer().getOfflinePlayer(getOwnerUUID());
     }
 
     @Override
     public void setOwner(AnimalTamer owner) {
-        if (owner != null && !"".equals(owner.getName())) {
+        if (owner != null) {
             setTamed(true);
             getHandle().setPathEntity(null);
-            setOwnerName(owner.getName());
+            setOwnerUUID(owner.getUniqueId());
         } else {
             setTamed(false);
-            setOwnerName("");
+            setOwnerUUID(null);
         }
     }
 
-    public String getOwnerName() {
-        return getHandle().getOwnerName();
+    public UUID getOwnerUUID() {
+        try {
+            return UUID.fromString(getHandle().getOwnerUUID());
+        } catch (IllegalArgumentException ex) {
+            return null;
+        }
     }
 
-    public void setOwnerName(String name) {
-        getHandle().setOwnerName(name);
+    public void setOwnerUUID(UUID uuid) {
+        if (uuid == null) {
+            getHandle().setOwnerUUID("");
+        } else {
+            getHandle().setOwnerUUID(uuid.toString());
+        }
     }
 
     public HorseInventory getInventory() {

src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -13,11 +13,13 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.UUID;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import net.minecraft.server.*;
 
+import net.minecraft.util.com.mojang.authlib.GameProfile;
 import org.apache.commons.lang.Validate;
 import org.apache.commons.lang.NotImplementedException;
 import org.bukkit.*;
@@ -64,7 +66,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     private boolean hasPlayedBefore = false;
     private final ConversationTracker conversationTracker = new ConversationTracker();
     private final Set<String> channels = new HashSet<String>();
-    private final Map<String, Player> hiddenPlayers = new MapMaker().softValues().makeMap();
+    private final Set<UUID> hiddenPlayers = new HashSet<UUID>();
     private int hash = 0;
     private double health = 20;
     private boolean scaledHealth = false;
@@ -76,9 +78,13 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         firstPlayed = System.currentTimeMillis();
     }
 
+    public GameProfile getProfile() {
+        return getHandle().getProfile();
+    }
+
     @Override
     public boolean isOp() {
-        return server.getHandle().isOp(getName());
+        return server.getHandle().isOp(getProfile());
     }
 
     @Override
@@ -86,9 +92,9 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         if (value == isOp()) return;
 
         if (value) {
-            server.getHandle().addOp(getName());
+            server.getHandle().addOp(getProfile());
         } else {
-            server.getHandle().removeOp(getName());
+            server.getHandle().removeOp(getProfile());
         }
 
         perm.recalculatePermissions();
@@ -732,29 +738,29 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
 
     @Override
     public boolean isBanned() {
-        return server.getBanList(BanList.Type.NAME).isBanned(getName());
+        return server.getBanList(BanList.Type.UUID).isBanned(getUniqueId().toString());
     }
 
     @Override
     public void setBanned(boolean value) {
         if (value) {
-            server.getBanList(BanList.Type.NAME).addBan(getName(), null, null, null);
+            server.getBanList(BanList.Type.UUID).addBan(getUniqueId().toString(), null, null, null);
         } else {
-            server.getBanList(BanList.Type.NAME).pardon(getName());
+            server.getBanList(BanList.Type.UUID).pardon(getUniqueId().toString());
         }
     }
 
     @Override
     public boolean isWhitelisted() {
-        return server.getHandle().getWhitelisted().contains(getName().toLowerCase());
+        return server.getHandle().isWhitelisted(getProfile());
     }
 
     @Override
     public void setWhitelisted(boolean value) {
         if (value) {
-            server.getHandle().addWhitelist(getName().toLowerCase());
+            server.getHandle().addWhitelist(getProfile());
         } else {
-            server.getHandle().removeWhitelist(getName().toLowerCase());
+            server.getHandle().removeWhitelist(getProfile());
         }
     }
 
@@ -872,8 +878,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         Validate.notNull(player, "hidden player cannot be null");
         if (getHandle().playerConnection == null) return;
         if (equals(player)) return;
-        if (hiddenPlayers.containsKey(player.getName())) return;
-        hiddenPlayers.put(player.getName(), player);
+        if (hiddenPlayers.contains(player.getUniqueId())) return;
+        hiddenPlayers.add(player.getUniqueId());
 
         //remove this player from the hidden player's EntityTrackerEntry
         EntityTracker tracker = ((WorldServer) entity.world).tracker;
@@ -891,8 +897,8 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         Validate.notNull(player, "shown player cannot be null");
         if (getHandle().playerConnection == null) return;
         if (equals(player)) return;
-        if (!hiddenPlayers.containsKey(player.getName())) return;
-        hiddenPlayers.remove(player.getName());
+        if (!hiddenPlayers.contains(player.getUniqueId())) return;
+        hiddenPlayers.remove(player.getUniqueId());
 
         EntityTracker tracker = ((WorldServer) entity.world).tracker;
         EntityPlayer other = ((CraftPlayer) player).getHandle();
@@ -904,8 +910,12 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         getHandle().playerConnection.sendPacket(new PacketPlayOutPlayerInfo(player.getPlayerListName(), true, getHandle().ping));
     }
 
+    public void removeDisconnectingPlayer(Player player) {
+        hiddenPlayers.remove(player.getUniqueId());
+    }
+
     public boolean canSee(Player player) {
-        return !hiddenPlayers.containsKey(player.getName());
+        return !hiddenPlayers.contains(player.getUniqueId());
     }
 
     public Map<String, Object> serialize() {

src/main/java/org/bukkit/craftbukkit/entity/CraftTameableAnimal.java

@@ -6,6 +6,8 @@ import org.bukkit.entity.AnimalTamer;
 import org.bukkit.entity.Creature;
 import org.bukkit.entity.Tameable;
 
+import java.util.UUID;
+
 public class CraftTameableAnimal extends CraftAnimals implements Tameable, Creature {
     public CraftTameableAnimal(CraftServer server, EntityTameableAnimal entity) {
         super(server, entity);
@@ -16,21 +18,35 @@ public class CraftTameableAnimal extends CraftAnimals implements Tameable, Creat
         return (EntityTameableAnimal)super.getHandle();
     }
 
-    public AnimalTamer getOwner() {
-        if (("").equals(getOwnerName())) return null;
+    public UUID getOwnerUUID() {
+        try {
+            return UUID.fromString(getHandle().getOwnerUUID());
+        } catch (IllegalArgumentException ex) {
+            return null;
+        }
+    }
 
-        AnimalTamer owner = getServer().getPlayerExact(getOwnerName());
+    public void setOwnerUUID(UUID uuid) {
+        if (uuid == null) {
+            getHandle().setOwnerUUID("");
+        } else {
+            getHandle().setOwnerUUID(uuid.toString());
+        }
+    }
+
+    public AnimalTamer getOwner() {
+        if (getOwnerUUID() == null) {
+            return null;
+        }
+
+        AnimalTamer owner = getServer().getPlayer(getOwnerUUID());
         if (owner == null) {
-            owner = getServer().getOfflinePlayer(getOwnerName());
+            owner = getServer().getOfflinePlayer(getOwnerUUID());
         }
 
         return owner;
     }
 
-    public String getOwnerName() {
-        return getHandle().getOwnerName();
-    }
-
     public boolean isTamed() {
         return getHandle().isTamed();
     }
@@ -39,21 +55,17 @@ public class CraftTameableAnimal extends CraftAnimals implements Tameable, Creat
         if (tamer != null) {
             setTamed(true);
             getHandle().setPathEntity(null);
-            setOwnerName(tamer.getName());
+            setOwnerUUID(tamer.getUniqueId());
         } else {
             setTamed(false);
-            setOwnerName("");
+            setOwnerUUID(null);
         }
     }
 
-    public void setOwnerName(String ownerName) {
-        getHandle().setOwnerName(ownerName == null ? "" : ownerName);
-    }
-
     public void setTamed(boolean tame) {
         getHandle().setTamed(tame);
         if (!tame) {
-            setOwnerName("");
+            setOwnerUUID(null);
         }
     }
 

src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -85,7 +85,7 @@ public class CraftEventFactory {
 
         if (world.getHandle().dimension != 0) return true;
         if (spawnSize <= 0) return true;
-        if (((CraftServer) Bukkit.getServer()).getHandle().getOPs().isEmpty()) return true;
+        if (((CraftServer) Bukkit.getServer()).getHandle().getOPs().d()) return true; // Should be isEmpty
         if (player.isOp()) return true;
 
         ChunkCoordinates chunkcoordinates = worldServer.getSpawn();