mcs/class/System/Mono.Http/NtlmClient.cs

   1 //
   2 // Mono.Http.NtlmClient
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //
   7 // (c) 2003 Novell, Inc. (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 #if SECURITY_DEP
  32 using System;
  33 using System.Collections;
  34 using System.Net;
  35 using Mono.Security.Protocol.Ntlm;
  36
  37 namespace Mono.Http
  38 {
  39         class NtlmSession
  40         {
  41                 MessageBase message;
  42
  43                 public NtlmSession ()
  44                 {
  45                 }
  46
  47                 public Authorization Authenticate (string challenge, WebRequest webRequest, ICredentials credentials)
  48                 {
  49                         HttpWebRequest request = webRequest as HttpWebRequest;
  50                         if (request == null)
  51                                 return null;
  52
  53                         NetworkCredential cred = credentials.GetCredential (request.RequestUri, "NTLM");
  54                         if (cred == null)
  55                                 return null;
  56
  57                         string userName = cred.UserName;
  58                         string domain = cred.Domain;
  59                         string password = cred.Password;
  60                         if (userName == null || userName == "")
  61                                 return null;
  62
  63                         if (String.IsNullOrEmpty (domain)) {
  64                                 int idx = userName.IndexOf ('\\');
  65                                 if (idx == -1) {
  66                                         idx = userName.IndexOf ('/');
  67                                 }
  68                                 if (idx >= 0) {
  69                                         domain = userName.Substring (0, idx);
  70                                         userName = userName.Substring (idx + 1);
  71                                 }
  72                         }
  73
  74                         bool completed = false;
  75                         if (message == null) {
  76                                 Type1Message type1 = new Type1Message ();
  77                                 type1.Domain = domain;
  78                                 type1.Host = ""; // MS does not send it
  79                                 type1.Flags |= NtlmFlags.NegotiateNtlm2Key;
  80                                 message = type1;
  81                         } else if (message.Type == 1) {
  82                                 // Should I check the credentials?
  83                                 if (challenge == null) {
  84                                         message = null;
  85                                         return null;
  86                                 }
  87
  88                                 Type2Message type2 = new Type2Message (Convert.FromBase64String (challenge));
  89                                 if (password == null)
  90                                         password = "";
  91
  92                                 Type3Message type3 = new Type3Message (type2);
  93                                 type3.Username = userName;
  94                                 type3.Password = password;
  95                                 message = type3;
  96                                 completed = true;
  97                         } else {
  98                                 // Should I check the credentials?
  99                                 // type must be 3 here
 100                                 if (challenge == null || challenge == String.Empty) {
 101                                         Type1Message type1 = new Type1Message ();
 102                                         type1.Domain = domain;
 103                                         type1.Host = ""; // MS does not send it
 104                                         message = type1;
 105                                 } else {
 106                                         completed = true;
 107                                 }
 108                         }
 109
 110                         string token = "NTLM " + Convert.ToBase64String (message.GetBytes ());
 111                         return new Authorization (token, completed);
 112                 }
 113         }
 114
 115         class NtlmClient : IAuthenticationModule
 116         {
 117                 static Hashtable cache;
 118
 119                 static NtlmClient ()
 120                 {
 121                         cache = new Hashtable ();
 122                 }
 123
 124                 public NtlmClient () {}
 125
 126                 public Authorization Authenticate (string challenge, WebRequest webRequest, ICredentials credentials)
 127                 {
 128                         if (credentials == null || challenge == null)
 129                                 return null;
 130
 131                         string header = challenge.Trim ();
 132                         int idx = header.ToLower ().IndexOf ("ntlm");
 133                         if (idx == -1)
 134                                 return null;
 135
 136                         idx = header.IndexOfAny (new char [] {' ', '\t'});
 137                         if (idx != -1) {
 138                                 header = header.Substring (idx).Trim ();
 139                         } else {
 140                                 header = null;
 141                         }
 142
 143                         HttpWebRequest request = webRequest as HttpWebRequest;
 144                         if (request == null)
 145                                 return null;
 146
 147                         lock (cache) {
 148                                 NtlmSession ds = (NtlmSession) cache [request];
 149                                 if (ds == null) {
 150                                         ds = new NtlmSession ();
 151                                         cache.Add (request, ds);
 152                                 }
 153
 154                                 return ds.Authenticate (header, webRequest, credentials);
 155                         }
 156                 }
 157
 158                 public Authorization PreAuthenticate (WebRequest webRequest, ICredentials credentials)
 159                 {
 160                         return null;
 161                 }
 162
 163                 public string AuthenticationType {
 164                         get { return "NTLM"; }
 165                 }
 166
 167                 public bool CanPreAuthenticate {
 168                         get { return false; }
 169                 }
 170         }
 171 }
 172 #endif