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
  33 #if MONOTOUCH
  34 using Mono.Security.Protocol.Ntlm;
  35 #else
  36 extern alias MonoSecurity;
  37 using MonoSecurity::Mono.Security.Protocol.Ntlm;
  38 #endif
  39
  40 using System;
  41 using System.Collections;
  42 using System.Net;
  43
  44 namespace Mono.Http
  45 {
  46         class NtlmSession
  47         {
  48                 MessageBase message;
  49
  50                 public NtlmSession ()
  51                 {
  52                 }
  53
  54                 public Authorization Authenticate (string challenge, WebRequest webRequest, ICredentials credentials)
  55                 {
  56                         HttpWebRequest request = webRequest as HttpWebRequest;
  57                         if (request == null)
  58                                 return null;
  59
  60                         NetworkCredential cred = credentials.GetCredential (request.RequestUri, "NTLM");
  61                         if (cred == null)
  62                                 return null;
  63
  64                         string userName = cred.UserName;
  65                         string domain = cred.Domain;
  66                         string password = cred.Password;
  67                         if (userName == null || userName == "")
  68                                 return null;
  69
  70                         if (String.IsNullOrEmpty (domain)) {
  71                                 int idx = userName.IndexOf ('\\');
  72                                 if (idx == -1) {
  73                                         idx = userName.IndexOf ('/');
  74                                 }
  75                                 if (idx >= 0) {
  76                                         domain = userName.Substring (0, idx);
  77                                         userName = userName.Substring (idx + 1);
  78                                 }
  79                         }
  80
  81                         bool completed = false;
  82                         if (message == null) {
  83                                 Type1Message type1 = new Type1Message ();
  84                                 type1.Domain = domain;
  85                                 type1.Host = ""; // MS does not send it
  86                                 type1.Flags |= NtlmFlags.NegotiateNtlm2Key;
  87                                 message = type1;
  88                         } else if (message.Type == 1) {
  89                                 // Should I check the credentials?
  90                                 if (challenge == null) {
  91                                         message = null;
  92                                         return null;
  93                                 }
  94
  95                                 Type2Message type2 = new Type2Message (Convert.FromBase64String (challenge));
  96                                 if (password == null)
  97                                         password = "";
  98
  99                                 Type3Message type3 = new Type3Message (type2);
 100                                 type3.Username = userName;
 101                                 type3.Password = password;
 102                                 type3.Domain = domain;
 103                                 message = type3;
 104                                 completed = true;
 105                         } else {
 106                                 // Should I check the credentials?
 107                                 // type must be 3 here
 108                                 if (challenge == null || challenge == String.Empty) {
 109                                         Type1Message type1 = new Type1Message ();
 110                                         type1.Domain = domain;
 111                                         type1.Host = ""; // MS does not send it
 112                                         message = type1;
 113                                 } else {
 114                                         completed = true;
 115                                 }
 116                         }
 117
 118                         string token = "NTLM " + Convert.ToBase64String (message.GetBytes ());
 119                         return new Authorization (token, completed);
 120                 }
 121         }
 122
 123         class NtlmClient : IAuthenticationModule
 124         {
 125                 static Hashtable cache;
 126
 127                 static NtlmClient ()
 128                 {
 129                         cache = new Hashtable ();
 130                 }
 131
 132                 public NtlmClient () {}
 133
 134                 public Authorization Authenticate (string challenge, WebRequest webRequest, ICredentials credentials)
 135                 {
 136                         if (credentials == null || challenge == null)
 137                                 return null;
 138
 139                         string header = challenge.Trim ();
 140                         int idx = header.ToLower ().IndexOf ("ntlm");
 141                         if (idx == -1)
 142                                 return null;
 143
 144                         idx = header.IndexOfAny (new char [] {' ', '\t'});
 145                         if (idx != -1) {
 146                                 header = header.Substring (idx).Trim ();
 147                         } else {
 148                                 header = null;
 149                         }
 150
 151                         HttpWebRequest request = webRequest as HttpWebRequest;
 152                         if (request == null)
 153                                 return null;
 154
 155                         lock (cache) {
 156                                 NtlmSession ds = (NtlmSession) cache [request];
 157                                 if (ds == null) {
 158                                         ds = new NtlmSession ();
 159                                         cache.Add (request, ds);
 160                                 }
 161
 162                                 return ds.Authenticate (header, webRequest, credentials);
 163                         }
 164                 }
 165
 166                 public Authorization PreAuthenticate (WebRequest webRequest, ICredentials credentials)
 167                 {
 168                         return null;
 169                 }
 170
 171                 public string AuthenticationType {
 172                         get { return "NTLM"; }
 173                 }
 174
 175                 public bool CanPreAuthenticate {
 176                         get { return false; }
 177                 }
 178         }
 179 }
 180 #endif