App refactoring almost done

- Created specific namespaces and folders for each app brick
- Added proxy support using Starksoft's Biko Library
- App bricks: Main, ChatBots, Crypto, Protocol, Proxy
- Each class is now in its own file (Aes streams, chatbots)
- Used "Bridge" design pattern for Crypto, Protocol, Proxy
- Added back support for Minecraft 1.4.6 to 1.6.4 (MCC 1.6.2)
- Need to fully re-test everything and fix bugs
- To Fix : Server pinging is slow on SpigotMC
- To Do : Add Minecraft 1.2.5 (MCC 1.3) and maybe 1.3 to 1.4.5

MinecraftClient/Crypto/Streams/MonoAesStream.cs

@@ -0,0 +1,148 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Security.Cryptography;
+using System.IO;
+
+namespace MinecraftClient.Crypto.Streams
+{
+    /// <summary>
+    /// An encrypted stream using AES, used for encrypting network data on the fly using AES.
+    /// This is a mono-compatible adaptation which only sends and receive 16 bytes at a time, and manually transforms blocks.
+    /// Data is cached before reaching the 128bits block size necessary for mono which is not CFB-8 compatible.
+    /// </summary>
+
+    public class MonoAesStream : Stream, IAesStream
+    {
+        IPaddingProvider pad;
+        ICryptoTransform enc;
+        ICryptoTransform dec;
+        List<byte> dec_cache = new List<byte>();
+        List<byte> tosend_cache = new List<byte>();
+        public MonoAesStream(System.IO.Stream stream, byte[] key, IPaddingProvider provider)
+        {
+            BaseStream = stream;
+            RijndaelManaged aes = GenerateAES(key);
+            enc = aes.CreateEncryptor();
+            dec = aes.CreateDecryptor();
+        }
+        public System.IO.Stream BaseStream { get; set; }
+
+        public override bool CanRead
+        {
+            get { return true; }
+        }
+
+        public override bool CanSeek
+        {
+            get { return false; }
+        }
+
+        public override bool CanWrite
+        {
+            get { return true; }
+        }
+
+        public override void Flush()
+        {
+            BaseStream.Flush();
+        }
+
+        public override long Length
+        {
+            get { throw new NotSupportedException(); }
+        }
+
+        public override long Position
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+            set
+            {
+                throw new NotSupportedException();
+            }
+        }
+
+        public override int ReadByte()
+        {
+            byte[] temp = new byte[1];
+            Read(temp, 0, 1);
+            return temp[0];
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            while (dec_cache.Count < count)
+            {
+                byte[] temp_in = new byte[16];
+                byte[] temp_out = new byte[16];
+                int read = 0;
+                while (read < 16)
+                    read += BaseStream.Read(temp_in, read, 16 - read);
+                dec.TransformBlock(temp_in, 0, 16, temp_out, 0);
+                foreach (byte b in temp_out)
+                    dec_cache.Add(b);
+            }
+
+            for (int i = offset; i - offset < count; i++)
+            {
+                buffer[i] = dec_cache[0];
+                dec_cache.RemoveAt(0);
+            }
+
+            return count;
+        }
+
+        public override long Seek(long offset, System.IO.SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void SetLength(long value)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void WriteByte(byte b)
+        {
+            Write(new byte[] { b }, 0, 1);
+        }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            for (int i = offset; i - offset < count; i++)
+                tosend_cache.Add(buffer[i]);
+
+            if (tosend_cache.Count < 16)
+                tosend_cache.AddRange(pad.getPaddingPacket());
+
+            while (tosend_cache.Count > 16)
+            {
+                byte[] temp_in = new byte[16];
+                byte[] temp_out = new byte[16];
+                for (int i = 0; i < 16; i++)
+                {
+                    temp_in[i] = tosend_cache[0];
+                    tosend_cache.RemoveAt(0);
+                }
+                enc.TransformBlock(temp_in, 0, 16, temp_out, 0);
+                BaseStream.Write(temp_out, 0, 16);
+            }
+        }
+
+        private RijndaelManaged GenerateAES(byte[] key)
+        {
+            RijndaelManaged cipher = new RijndaelManaged();
+            cipher.Mode = CipherMode.CFB;
+            cipher.Padding = PaddingMode.None;
+            cipher.KeySize = 128;
+            cipher.FeedbackSize = 8;
+            cipher.Key = key;
+            cipher.IV = key;
+            return cipher;
+        }
+    }
+}

MinecraftClient/Crypto/Streams/RegularAesStream.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Security.Cryptography;
+using System.IO;
+
+namespace MinecraftClient.Crypto.Streams
+{
+    /// <summary>
+    /// An encrypted stream using AES, used for encrypting network data on the fly using AES.
+    /// This is the regular AesStream class used with the regular .NET framework from Microsoft.
+    /// </summary>
+
+    public class RegularAesStream : Stream, IAesStream
+    {
+        CryptoStream enc;
+        CryptoStream dec;
+        public RegularAesStream(Stream stream, byte[] key)
+        {
+            BaseStream = stream;
+            enc = new CryptoStream(stream, GenerateAES(key).CreateEncryptor(), CryptoStreamMode.Write);
+            dec = new CryptoStream(stream, GenerateAES(key).CreateDecryptor(), CryptoStreamMode.Read);
+        }
+        public System.IO.Stream BaseStream { get; set; }
+
+        public override bool CanRead
+        {
+            get { return true; }
+        }
+
+        public override bool CanSeek
+        {
+            get { return false; }
+        }
+
+        public override bool CanWrite
+        {
+            get { return true; }
+        }
+
+        public override void Flush()
+        {
+            BaseStream.Flush();
+        }
+
+        public override long Length
+        {
+            get { throw new NotSupportedException(); }
+        }
+
+        public override long Position
+        {
+            get
+            {
+                throw new NotSupportedException();
+            }
+            set
+            {
+                throw new NotSupportedException();
+            }
+        }
+
+        public override int ReadByte()
+        {
+            return dec.ReadByte();
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            return dec.Read(buffer, offset, count);
+        }
+
+        public override long Seek(long offset, System.IO.SeekOrigin origin)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void SetLength(long value)
+        {
+            throw new NotSupportedException();
+        }
+
+        public override void WriteByte(byte b)
+        {
+            enc.WriteByte(b);
+        }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            enc.Write(buffer, offset, count);
+        }
+
+        private RijndaelManaged GenerateAES(byte[] key)
+        {
+            RijndaelManaged cipher = new RijndaelManaged();
+            cipher.Mode = CipherMode.CFB;
+            cipher.Padding = PaddingMode.None;
+            cipher.KeySize = 128;
+            cipher.FeedbackSize = 8;
+            cipher.Key = key;
+            cipher.IV = key;
+            return cipher;
+        }
+    }
+}