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