v0.2.2: updated Lidgren, railgun shells can be bought, autorestart server, netstats, tutorial moloch spawning in a wall fix, misc error checks

Lidgren.Network/Encryption/NetEncryption.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Security.Cryptography;
+
+namespace Lidgren.Network
+{
+	/// <summary>
+	/// Interface for an encryption algorithm
+	/// </summary>
+	public abstract class NetEncryption
+	{
+		/// <summary>
+		/// NetPeer
+		/// </summary>
+		protected NetPeer m_peer;
+
+		/// <summary>
+		/// Constructor
+		/// </summary>
+		public NetEncryption(NetPeer peer)
+		{
+			if (peer == null)
+				throw new NetException("Peer must not be null");
+			m_peer = peer;
+		}
+
+		public void SetKey(string str)
+		{
+			var bytes = System.Text.Encoding.ASCII.GetBytes(str);
+			SetKey(bytes, 0, bytes.Length);
+		}
+
+		public abstract void SetKey(byte[] data, int offset, int count);
+
+		/// <summary>
+		/// Encrypt an outgoing message in place
+		/// </summary>
+		public abstract bool Encrypt(NetOutgoingMessage msg);
+
+		/// <summary>
+		/// Decrypt an incoming message in place
+		/// </summary>
+		public abstract bool Decrypt(NetIncomingMessage msg);
+	}
+}