Add the files

ProxyServer/AuthBase.cs

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+/*
+    Copyright © 2002, The KPD-Team
+    All rights reserved.
+    http://www.mentalis.org/
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+
+    - Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer. 
+
+    - Neither the name of the KPD-Team, nor the names of its contributors
+       may be used to endorse or promote products derived from this
+       software without specific prior written permission. 
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+  THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+  OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+using System;
+using System.Net;
+using System.Net.Sockets;
+using Org.Mentalis.Proxy;
+using Org.Mentalis.Proxy.Socks;
+
+namespace Org.Mentalis.Proxy.Socks.Authentication {
+
+///<summary>Defines the signature of the method to be called when the authentication is complete.</summary>
+///<param name="Success">Specifies whether the authentication was successfull or not.</param>
+internal delegate void AuthenticationCompleteDelegate(bool Success);
+
+///<summary>Authenticates a user on a SOCKS5 server according to the implemented subprotocol.</summary>
+///<remarks>This is an abstract class. The subprotocol that's used to authenticate a user is specified in the subclasses of this base class.</remarks>
+internal abstract class AuthBase {
+	///<summary>Initializes a new instance of the AuthBase class.</summary>
+	public AuthBase() {}
+	///<summary>Starts the authentication process.</summary>
+	///<remarks>This abstract method must be implemented in the subclasses, according to the selected subprotocol.</remarks>
+	///<param name="Connection">The connection with the SOCKS client.</param>
+	///<param name="Callback">The method to call when the authentication is complete.</param>
+	internal abstract void StartAuthentication(Socket Connection, AuthenticationCompleteDelegate Callback);
+	///<summary>Gets or sets the Socket connection between the proxy server and the SOCKS client.</summary>
+	///<value>A Socket instance defining the connection between the proxy server and the local client.</value>
+	protected Socket Connection {
+		get {
+			return m_Connection;
+		}
+		set {
+			if (value == null)
+				throw new ArgumentNullException();
+			m_Connection = value;
+		}
+	}
+	///<summary>Gets a buffer that can be used to receive data from the client connection.</summary>
+	///<value>An array of bytes that can be used to receive data from the client connection.</value>
+	protected byte [] Buffer {
+		get {
+			return m_Buffer;
+		}
+	}
+	///<summary>Gets or sets an array of bytes that can be used to store all received data.</summary>
+	///<value>An array of bytes that can be used to store all received data.</value>
+	protected byte [] Bytes {
+		get {
+			return m_Bytes;
+		}
+		set {
+			m_Bytes = value;
+		}
+	}
+	///<summary>Adds bytes to the array returned by the Bytes property.</summary>
+	///<param name="NewBytes">The bytes to add.</param>
+	///<param name="Cnt">The number of bytes to add.</param>
+	protected void AddBytes(byte [] NewBytes, int Cnt) {
+		if (Cnt <= 0 || NewBytes == null || Cnt > NewBytes.Length)
+			return;
+		if (Bytes == null) {
+			Bytes = new byte[Cnt];
+		} else {
+			byte [] tmp = Bytes;
+			Bytes = new byte[Bytes.Length  + Cnt];
+			Array.Copy(tmp, 0, Bytes, 0, tmp.Length);
+		}
+		Array.Copy(NewBytes, 0, Bytes, Bytes.Length - Cnt, Cnt);
+	}
+	///<summary>The method to call when the authentication is complete.</summary>
+	protected AuthenticationCompleteDelegate Callback;
+	// private variables
+	/// <summary>Holds the value of the Connection property.</summary>
+	private Socket m_Connection;
+	/// <summary>Holds the value of the Buffer property.</summary>
+	private byte [] m_Buffer = new byte[1024];
+	/// <summary>Holds the value of the Bytes property.</summary>
+	private byte [] m_Bytes;
+}
+
+}