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                                 modules.Add (new BasicClient ());
  59                                 modules.Add (new DigestClient ());
  60                                 modules.Add (new NtlmClient ());
  61 #else
  62 #if NET_2_0 && CONFIGURATION_DEP
  63                                 object cfg = ConfigurationManager.GetSection ("system.net/authenticationModules");
  64                                 AuthenticationModulesSection s = cfg as AuthenticationModulesSection;
  65                                 if (s != null) {
  66                                         foreach (AuthenticationModuleElement element in s.AuthenticationModules) {
  67                                                 IAuthenticationModule module = null;
  68                                                 try {
  69                                                         Type type = Type.GetType (element.Type, true);
  70                                                         module = (IAuthenticationModule) Activator.CreateInstance (type);
  71                                                 } catch {}
  72                                                 modules.Add (module);
  73                                         }
  74                                 }
  75 #else
  76                                 ConfigurationSettings.GetConfig ("system.net/authenticationModules");
  77 #endif
  78 #endif
  79                         }
  80                 }
  81
  82 #if NET_2_0
  83                 static ICredentialPolicy credential_policy = null;
  84
  85                 public static ICredentialPolicy CredentialPolicy
  86                 {
  87                         get {
  88                                 return(credential_policy);
  89                                                         }
  90                         set {
  91                                 credential_policy = value;
  92                         }
  93                 }
  94
  95                 static Exception GetMustImplement ()
  96                 {
  97                         return new NotImplementedException ();
  98                 }
  99
 100                 [MonoTODO]
 101                 public static StringDictionary CustomTargetNameDictionary
 102                 {
 103                         get {
 104                                 throw GetMustImplement ();
 105                         }
 106                 }
 107 #endif
 108
 109                 public static IEnumerator RegisteredModules {
 110                         get {
 111                                 EnsureModules ();
 112                                 return modules.GetEnumerator ();
 113                         }
 114                 }
 115
 116                 internal static void Clear ()
 117                 {
 118                         EnsureModules ();
 119                         lock (modules)
 120                                 modules.Clear ();
 121                 }
 122
 123                 public static Authorization Authenticate (string challenge, WebRequest request, ICredentials credentials)
 124                 {
 125                         if (request == null)
 126                                 throw new ArgumentNullException ("request");
 127
 128                         if (credentials == null)
 129                                 throw new ArgumentNullException ("credentials");
 130
 131                         if (challenge == null)
 132                                 throw new ArgumentNullException ("challenge");
 133
 134                         return DoAuthenticate (challenge, request, credentials);
 135                 }
 136
 137                 static Authorization DoAuthenticate (string challenge, WebRequest request, ICredentials credentials)
 138                 {
 139                         EnsureModules ();
 140                         lock (modules) {
 141                                 foreach (IAuthenticationModule mod in modules) {
 142                                         Authorization auth = mod.Authenticate (challenge, request, credentials);
 143                                         if (auth == null)
 144                                                 continue;
 145
 146                                         auth.Module = mod;
 147                                         return auth;
 148                                 }
 149                         }
 150
 151                         return null;
 152                 }
 153
 154                 public static Authorization PreAuthenticate (WebRequest request, ICredentials credentials)
 155                 {
 156                         if (request == null)
 157                                 throw new ArgumentNullException ("request");
 158
 159                         if (credentials == null)
 160                                 return null;
 161
 162                         EnsureModules ();
 163                         lock (modules) {
 164                                 foreach (IAuthenticationModule mod in modules) {
 165                                         Authorization auth = mod.PreAuthenticate (request, credentials);
 166                                         if (auth == null)
 167                                                 continue;
 168
 169                                         auth.Module = mod;
 170                                         return auth;
 171                                 }
 172                         }
 173
 174                         return null;
 175                 }
 176
 177                 public static void Register (IAuthenticationModule authenticationModule)
 178                 {
 179                         if (authenticationModule == null)
 180                                 throw new ArgumentNullException ("authenticationModule");
 181
 182                         DoUnregister (authenticationModule.AuthenticationType, false);
 183                         lock (modules)
 184                                 modules.Add (authenticationModule);
 185                 }
 186
 187                 public static void Unregister (IAuthenticationModule authenticationModule)
 188                 {
 189                         if (authenticationModule == null)
 190                                 throw new ArgumentNullException ("authenticationModule");
 191
 192                         DoUnregister (authenticationModule.AuthenticationType, true);
 193                 }
 194
 195                 public static void Unregister (string authenticationScheme)
 196                 {
 197                         if (authenticationScheme == null)
 198                                 throw new ArgumentNullException ("authenticationScheme");
 199
 200                         DoUnregister (authenticationScheme, true);
 201                 }
 202
 203                 static void DoUnregister (string authenticationScheme, bool throwEx)
 204                 {
 205                         EnsureModules ();
 206                         lock (modules) {
 207                                 IAuthenticationModule module = null;
 208                                 foreach (IAuthenticationModule mod in modules) {
 209                                         string modtype = mod.AuthenticationType;
 210                                         if (String.Compare (modtype, authenticationScheme, true) == 0) {
 211                                                 module = mod;
 212                                                 break;
 213                                         }
 214                                 }
 215
 216                                 if (module == null) {
 217                                         if (throwEx)
 218                                                 throw new InvalidOperationException ("Scheme not registered.");
 219                                 } else {
 220                                         modules.Remove (module);
 221                                 }
 222                         }
 223                 }
 224         }
 225 }
 226