mcs/class/Mono.Security/Mono.Security.Protocol.Ntlm/Type1Message.cs

   1 //
   2 // Mono.Security.Protocol.Ntlm.Type1Message - Negotiation
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // References
  11 // a.   NTLM Authentication Scheme for HTTP, Ronald Tschalär
  12 //      http://www.innovation.ch/java/ntlm.html
  13 // b.   The NTLM Authentication Protocol, Copyright © 2003 Eric Glass
  14 //      http://davenport.sourceforge.net/ntlm.html
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System;
  37 using System.Globalization;
  38 using System.Text;
  39
  40 namespace Mono.Security.Protocol.Ntlm {
  41
  42         public class Type1Message : MessageBase {
  43
  44                 private string _host;
  45                 private string _domain;
  46
  47                 public Type1Message () : base (1)
  48                 {
  49                         // default values
  50                         _domain = Environment.UserDomainName;
  51                         _host = Environment.MachineName;
  52                         Flags = (NtlmFlags) 0xb203;
  53                 }
  54
  55                 public Type1Message (byte[] message) : base (1)
  56                 {
  57                         Decode (message);
  58                 }
  59
  60                 // properties
  61
  62                 public string Domain {
  63                         get { return _domain; }
  64                         set { _domain = value; }
  65                 }
  66
  67                 public string Host {
  68                         get { return _host; }
  69                         set { _host = value; }
  70                 }
  71
  72                 // methods
  73
  74                 protected override void Decode (byte[] message)
  75                 {
  76                         base.Decode (message);
  77
  78                         Flags = (NtlmFlags) BitConverterLE.ToUInt32 (message, 12);
  79
  80                         int dom_len = BitConverterLE.ToUInt16 (message, 16);
  81                         int dom_off = BitConverterLE.ToUInt16 (message, 20);
  82                         _domain = Encoding.ASCII.GetString (message, dom_off, dom_len);
  83
  84                         int host_len = BitConverterLE.ToUInt16 (message, 24);
  85                         _host = Encoding.ASCII.GetString (message, 32, host_len);
  86                 }
  87
  88                 public override byte[] GetBytes ()
  89                 {
  90                         short dom_len = (short) _domain.Length;
  91                         short host_len = (short) _host.Length;
  92
  93                         byte[] data = PrepareMessage (32 + dom_len + host_len);
  94
  95                         data [12] = (byte) Flags;
  96                         data [13] = (byte)((uint)Flags >> 8);
  97                         data [14] = (byte)((uint)Flags >> 16);
  98                         data [15] = (byte)((uint)Flags >> 24);
  99
 100                         short dom_off = (short)(32 + host_len);
 101
 102                         data [16] = (byte) dom_len;
 103                         data [17] = (byte)(dom_len >> 8);
 104                         data [18] = data [16];
 105                         data [19] = data [17];
 106                         data [20] = (byte) dom_off;
 107                         data [21] = (byte)(dom_off >> 8);
 108
 109                         data [24] = (byte) host_len;
 110                         data [25] = (byte)(host_len >> 8);
 111                         data [26] = data [24];
 112                         data [27] = data [25];
 113                         data [28] = 0x20;
 114                         data [29] = 0x00;
 115
 116                         byte[] host = Encoding.ASCII.GetBytes (_host.ToUpper (CultureInfo.InvariantCulture));
 117                         Buffer.BlockCopy (host, 0, data, 32, host.Length);
 118
 119                         byte[] domain = Encoding.ASCII.GetBytes (_domain.ToUpper (CultureInfo.InvariantCulture));
 120                         Buffer.BlockCopy (domain, 0, data, dom_off, domain.Length);
 121
 122                         return data;
 123                 }
 124         }
 125 }