141 lines
4.0 KiB
C#
Executable File
141 lines
4.0 KiB
C#
Executable File
//
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// Mono.Security.Protocol.Ntlm.MessageBase
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// abstract class for all NTLM messages
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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// Atsushi Enomoto <atsushi@ximian.com>
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//
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// Copyright (C) 2003 Motus Technologies Inc. (http://www.motus.com)
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// Copyright (C) 2004, 2007 Novell, Inc (http://www.novell.com)
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//
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// References
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// a. NTLM Authentication Scheme for HTTP, Ronald Tschalär
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// http://www.innovation.ch/java/ntlm.html
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// b. The NTLM Authentication Protocol, Copyright © 2003 Eric Glass
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// http://davenport.sourceforge.net/ntlm.html
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Globalization;
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namespace Mono.Security.Protocol.Ntlm {
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public abstract class MessageBase {
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static byte [] _current_os_version = GetOSVersion ();
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static byte [] GetOSVersion ()
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{
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Version v = Environment.OSVersion.Version;
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byte [] bytes = new byte [8];
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bytes [0] = (byte) v.Major;
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bytes [1] = (byte) v.Minor;
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bytes [2] = (byte) v.Build;
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bytes [3] = (byte) (v.Build >> 8);
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bytes [7] = 0xF;
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return bytes;
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}
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static private byte[] header = { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00 };
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private int _type;
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private NtlmFlags _flags;
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private NtlmVersion _version;
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private byte [] _osversion = _current_os_version;
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protected MessageBase (int messageType) : this (messageType, NtlmVersion.Version1)
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{
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}
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protected MessageBase (int messageType, NtlmVersion version)
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{
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_type = messageType;
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_version = version;
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}
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public NtlmFlags Flags {
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get { return _flags; }
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set { _flags = value; }
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}
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public byte [] OSVersion {
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get { return (byte []) _osversion.Clone (); }
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set { _osversion = (byte []) value.Clone (); }
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}
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public int Type {
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get { return _type; }
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}
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public NtlmVersion Version {
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get { return _version; }
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}
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protected byte[] PrepareMessage (int messageSize)
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{
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byte[] message = new byte [messageSize];
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Buffer.BlockCopy (header, 0, message, 0, 8);
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message [ 8] = (byte) _type;
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message [ 9] = (byte)(_type >> 8);
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message [10] = (byte)(_type >> 16);
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message [11] = (byte)(_type >> 24);
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return message;
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}
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protected virtual void Decode (byte[] message)
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{
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if (message == null)
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throw new ArgumentNullException ("message");
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if (message.Length < 12) {
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string msg = Locale.GetText ("Minimum message length is 12 bytes.");
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throw new ArgumentOutOfRangeException ("message", message.Length, msg);
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}
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if (!CheckHeader (message)) {
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string msg = String.Format (Locale.GetText ("Invalid Type{0} message."), _type);
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throw new ArgumentException (msg, "message");
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}
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}
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protected bool CheckHeader (byte[] message)
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{
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for (int i=0; i < header.Length; i++) {
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if (message [i] != header [i])
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return false;
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}
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return (BitConverterLE.ToUInt32 (message, 8) == _type);
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}
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public abstract byte[] GetBytes ();
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internal byte [] CreateSubArray (byte [] source, int offset, int length)
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{
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byte [] ret = new byte [length];
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Array.Copy (source, offset, ret, 0, length);
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return ret;
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}
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}
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}
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