1 files changed, 93 insertions, 0 deletions

diff --git a/mcs/class/Mono.Security/Mono.Security.Protocol.Ntlm/Type2Message.cs b/mcs/class/Mono.Security/Mono.Security.Protocol.Ntlm/Type2Message.cs
new file mode 100755
index 00000000000..7e1a513523c
--- /dev/null
+++ b/mcs/class/Mono.Security/Mono.Security.Protocol.Ntlm/Type2Message.cs
@@ -0,0 +1,93 @@
+//
+// Mono.Security.Protocol.Ntlm.Type2Message - Challenge
+//
+// Author:
+//	Sebastien Pouliot (spouliot@motus.com)
+//
+// Copyright (C) 2003 Motus Technologies Inc. (http://www.motus.com)
+//
+// References
+// a.	NTLM Authentication Scheme for HTTP, Ronald Tschalär
+//	http://www.innovation.ch/java/ntlm.html
+// b.	The NTLM Authentication Protocol, Copyright © 2003 Eric Glass
+//	http://davenport.sourceforge.net/ntlm.html
+//
+
+using System;
+using System.Security.Cryptography;
+
+namespace Mono.Security.Protocol.Ntlm {
+
+	public class Type2Message : MessageBase {
+
+		private byte[] _nonce;
+		private int _options;
+
+		public Type2Message () : base (2)
+		{
+			_nonce = new byte [8];
+			RandomNumberGenerator rng = RandomNumberGenerator.Create ();
+			rng.GetBytes (_nonce);
+			// default values
+			Flags = (NtlmFlags) 0x8201;
+		}
+
+		public Type2Message (byte[] message) : base (2)
+		{
+			_nonce = new byte [8];
+			Decode (message);
+		}
+
+		~Type2Message () 
+		{
+			if (_nonce != null)
+				Array.Clear (_nonce, 0, _nonce.Length);
+		}
+
+		// properties
+
+		public byte[] Nonce {
+			get { return (byte[]) _nonce.Clone (); }
+			set { 
+				if (value == null)
+					throw new ArgumentNullException ("Nonce");
+				if (value.Length != 8)
+					throw new ArgumentException ("Invalid Nonce Length");
+				_nonce = (byte[]) value.Clone (); 
+			}
+		}
+
+		// methods
+
+		private void Decode (byte[] message)
+		{
+			if (message == null)
+				throw new ArgumentNullException ("message");
+			
+			if (!CheckHeader (message))
+				throw new ArgumentException ("Invalid Type2 message");
+
+			Flags = (NtlmFlags) BitConverter.ToUInt32 (message, 20);
+
+			Buffer.BlockCopy (message, 24, _nonce, 0, 8);
+		}
+
+		public override byte[] GetBytes ()
+		{
+			byte[] data = PrepareMessage (40);
+
+			// message length
+			short msg_len = (short)data.Length;
+			data [16] = (byte) msg_len;
+			data [17] = (byte)(msg_len >> 8);
+
+			// flags
+			uint f = (uint) Flags;
+			data [20] = (byte) f;
+			data [21] = (byte)(f >> 8);
+
+			Buffer.BlockCopy (_nonce, 0, data, 24, _nonce.Length);
+			return data;
+		}
+	}
+}