class/System/System.Net/AuthenticationManager.cs

   1 //
   2 // System.Net.AuthenticationManager.cs
   3 //
   4 // Author:
   5 //      Miguel de Icaza (miguel@ximian.com)
   6 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   7 //
   8 // (C) 2002,2003 Ximian, Inc. (http://www.ximian.com)
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections;
  33 using System.Configuration;
  34 #if NET_2_0
  35 using System.Net.Configuration;
  36 using System.Collections.Specialized;
  37 #endif
  38
  39 namespace System.Net
  40 {
  41         public class AuthenticationManager
  42         {
  43                 static ArrayList modules;
  44                 static object locker = new object ();
  45
  46                 private AuthenticationManager ()
  47                 {
  48                 }
  49
  50                 static void EnsureModules ()
  51                 {
  52                         lock (locker) {
  53                                 if (modules != null)
  54                                         return;
  55
  56                                 modules = new ArrayList ();
  57 #if !MONOTOUCH
  58 #if NET_2_0 && CONFIGURATION_DEP
  59                                 object cfg = ConfigurationManager.GetSection ("system.net/authenticationModules");
  60                                 AuthenticationModulesSection s = cfg as AuthenticationModulesSection;
  61                                 if (s != null) {
  62                                         foreach (AuthenticationModuleElement element in s.AuthenticationModules) {
  63                                                 IAuthenticationModule module = null;
  64                                                 try {
  65                                                         Type type = Type.GetType (element.Type, true);
  66                                                         module = (IAuthenticationModule) Activator.CreateInstance (type);
  67                                                 } catch {}
  68                                                 modules.Add (module);
  69                                         }
  70                                 }
  71 #else
  72                                 ConfigurationSettings.GetConfig ("system.net/authenticationModules");
  73 #endif
  74 #endif
  75                         }
  76                 }
  77
  78 #if NET_2_0
  79                 static ICredentialPolicy credential_policy = null;
  80
  81                 public static ICredentialPolicy CredentialPolicy
  82                 {
  83                         get {
  84                                 return(credential_policy);
  85                                                         }
  86                         set {
  87                                 credential_policy = value;
  88                         }
  89                 }
  90
  91                 static Exception GetMustImplement ()
  92                 {
  93                         return new NotImplementedException ();
  94                 }
  95
  96                 [MonoTODO]
  97                 public static StringDictionary CustomTargetNameDictionary
  98                 {
  99                         get {
 100                                 throw GetMustImplement ();
 101                         }
 102                 }
 103 #endif
 104
 105                 public static IEnumerator RegisteredModules {
 106                         get {
 107                                 EnsureModules ();
 108                                 return modules.GetEnumerator ();
 109                         }
 110                 }
 111
 112                 internal static void Clear ()
 113                 {
 114                         EnsureModules ();
 115                         lock (modules)
 116                                 modules.Clear ();
 117                 }
 118
 119                 public static Authorization Authenticate (string challenge, WebRequest request, ICredentials credentials)
 120                 {
 121                         if (request == null)
 122                                 throw new ArgumentNullException ("request");
 123
 124                         if (credentials == null)
 125                                 throw new ArgumentNullException ("credentials");
 126
 127                         if (challenge == null)
 128                                 throw new ArgumentNullException ("challenge");
 129
 130                         return DoAuthenticate (challenge, request, credentials);
 131                 }
 132
 133                 static Authorization DoAuthenticate (string challenge, WebRequest request, ICredentials credentials)
 134                 {
 135                         EnsureModules ();
 136                         lock (modules) {
 137                                 foreach (IAuthenticationModule mod in modules) {
 138                                         Authorization auth = mod.Authenticate (challenge, request, credentials);
 139                                         if (auth == null)
 140                                                 continue;
 141
 142                                         auth.Module = mod;
 143                                         return auth;
 144                                 }
 145                         }
 146
 147                         return null;
 148                 }
 149
 150                 public static Authorization PreAuthenticate (WebRequest request, ICredentials credentials)
 151                 {
 152                         if (request == null)
 153                                 throw new ArgumentNullException ("request");
 154
 155                         if (credentials == null)
 156                                 return null;
 157
 158                         EnsureModules ();
 159                         lock (modules) {
 160                                 foreach (IAuthenticationModule mod in modules) {
 161                                         Authorization auth = mod.PreAuthenticate (request, credentials);
 162                                         if (auth == null)
 163                                                 continue;
 164
 165                                         auth.Module = mod;
 166                                         return auth;
 167                                 }
 168                         }
 169
 170                         return null;
 171                 }
 172
 173                 public static void Register (IAuthenticationModule authenticationModule)
 174                 {
 175                         if (authenticationModule == null)
 176                                 throw new ArgumentNullException ("authenticationModule");
 177
 178                         DoUnregister (authenticationModule.AuthenticationType, false);
 179                         lock (modules)
 180                                 modules.Add (authenticationModule);
 181                 }
 182
 183                 public static void Unregister (IAuthenticationModule authenticationModule)
 184                 {
 185                         if (authenticationModule == null)
 186                                 throw new ArgumentNullException ("authenticationModule");
 187
 188                         DoUnregister (authenticationModule.AuthenticationType, true);
 189                 }
 190
 191                 public static void Unregister (string authenticationScheme)
 192                 {
 193                         if (authenticationScheme == null)
 194                                 throw new ArgumentNullException ("authenticationScheme");
 195
 196                         DoUnregister (authenticationScheme, true);
 197                 }
 198
 199                 static void DoUnregister (string authenticationScheme, bool throwEx)
 200                 {
 201                         EnsureModules ();
 202                         lock (modules) {
 203                                 IAuthenticationModule module = null;
 204                                 foreach (IAuthenticationModule mod in modules) {
 205                                         string modtype = mod.AuthenticationType;
 206                                         if (String.Compare (modtype, authenticationScheme, true) == 0) {
 207                                                 module = mod;
 208                                                 break;
 209                                         }
 210                                 }
 211
 212                                 if (module == null) {
 213                                         if (throwEx)
 214                                                 throw new InvalidOperationException ("Scheme not registered.");
 215                                 } else {
 216                                         modules.Remove (module);
 217                                 }
 218                         }
 219                 }
 220         }
 221 }
 222