mcs/class/System/System.Net/CredentialCache.cs

   1 //
   2 // System.Net.CredentialCache.cs
   3 //
   4 // Author:
   5 //   Lawrence Pit (loz@cable.a2000.nl)
   6 //
   7
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections;
  31 using System.Runtime.Serialization;
  32
  33 namespace System.Net {
  34         public class CredentialCache : ICredentials, IEnumerable
  35 #if NET_2_0
  36                                      , ICredentialsByHost
  37 #endif
  38         {
  39                 static NetworkCredential empty = new NetworkCredential (String.Empty, String.Empty, String.Empty);
  40                 Hashtable cache;
  41 #if NET_2_0
  42                 Hashtable cacheForHost;
  43 #endif
  44
  45                 public CredentialCache ()
  46                 {
  47                         cache = new Hashtable ();
  48 #if NET_2_0
  49                         cacheForHost = new Hashtable ();
  50 #endif
  51                 }
  52
  53                 [MonoTODO ("Need EnvironmentPermission implementation first")]
  54                 public static ICredentials DefaultCredentials {
  55                         get {
  56                                 // This is used for NTLM, Kerberos and Negotiate under MS
  57                                 return empty;
  58                         }
  59                 }
  60
  61 #if NET_2_0
  62                 // MS does might return a special ICredentials which does not allow getting the
  63                 // username/password information out of it for non-internal classes.
  64                 public static NetworkCredential DefaultNetworkCredentials {
  65                         get { return empty; }
  66                 }
  67 #endif
  68
  69                 public NetworkCredential GetCredential (Uri uriPrefix, string authType)
  70                 {
  71                         int longestPrefix = -1;
  72                         NetworkCredential result = null;
  73
  74                         if (uriPrefix == null || authType == null)
  75                                 return null;
  76
  77                         string absPath = uriPrefix.AbsolutePath;
  78                         absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
  79
  80                         IDictionaryEnumerator e = cache.GetEnumerator ();
  81                         while (e.MoveNext ()) {
  82                                 CredentialCacheKey key = e.Key as CredentialCacheKey;
  83
  84                                 if (key.Length <= longestPrefix)
  85                                         continue;
  86
  87                                 if (String.Compare (key.AuthType, authType, true) != 0)
  88                                         continue;
  89
  90                                 Uri cachedUri = key.UriPrefix;
  91
  92                                 if (cachedUri.Scheme != uriPrefix.Scheme)
  93                                         continue;
  94
  95                                 if (cachedUri.Port != uriPrefix.Port)
  96                                         continue;
  97
  98                                 if (cachedUri.Host != uriPrefix.Host)
  99                                         continue;
 100
 101                                 if (!absPath.StartsWith (key.AbsPath))
 102                                         continue;
 103
 104                                 longestPrefix = key.Length;
 105                                 result = (NetworkCredential) e.Value;
 106                         }
 107
 108                         return result;
 109                 }
 110
 111                 public IEnumerator GetEnumerator ()
 112                 {
 113                         return cache.Values.GetEnumerator ();
 114                 }
 115
 116                 public void Add (Uri uriPrefix, string authType, NetworkCredential cred)
 117                 {
 118                         if (uriPrefix == null)
 119                                 throw new ArgumentNullException ("uriPrefix");
 120
 121                         if (authType == null)
 122                                 throw new ArgumentNullException ("authType");
 123
 124                         // throws ArgumentException when same key already exists.
 125                         cache.Add (new CredentialCacheKey (uriPrefix, authType), cred);
 126                 }
 127
 128                 public void Remove (Uri uriPrefix, string authType)
 129                 {
 130                         if (uriPrefix == null)
 131                                 throw new ArgumentNullException ("uriPrefix");
 132
 133                         if (authType == null)
 134                                 throw new ArgumentNullException ("authType");
 135
 136                         cache.Remove (new CredentialCacheKey (uriPrefix, authType));
 137                 }
 138
 139 #if NET_2_0
 140                 public NetworkCredential GetCredential (string host, int port, string authenticationType)
 141                 {
 142                         NetworkCredential result = null;
 143
 144                         if (host == null || port < 0 || authenticationType == null)
 145                                 return null;
 146
 147                         IDictionaryEnumerator e = cacheForHost.GetEnumerator ();
 148                         while (e.MoveNext ()) {
 149                                 CredentialCacheForHostKey key = e.Key as CredentialCacheForHostKey;
 150
 151                                 if (String.Compare (key.AuthType, authenticationType, true) != 0)
 152                                         continue;
 153
 154                                 if (key.Host != host)
 155                                         continue;
 156
 157                                 if (key.Port != port)
 158                                         continue;
 159
 160                                 result = (NetworkCredential) e.Value;
 161                         }
 162
 163                         return result;
 164                 }
 165
 166                 public void Add (string host, int port, string authenticationType, NetworkCredential credential)
 167                 {
 168                         if (host == null)
 169                                 throw new ArgumentNullException("host");
 170
 171                         if (port < 0)
 172                                 throw new ArgumentOutOfRangeException("port");
 173
 174                         if (authenticationType == null)
 175                                 throw new ArgumentOutOfRangeException("authenticationType");
 176
 177                         cacheForHost.Add (new CredentialCacheForHostKey (host, port, authenticationType), credential);
 178                 }
 179
 180                 public void Remove (string host, int port, string authenticationType)
 181                 {
 182                         if (host == null)
 183                                 return;
 184
 185                         if (authenticationType == null)
 186                                 return;
 187
 188                         cacheForHost.Remove (new CredentialCacheForHostKey (host, port, authenticationType));
 189                 }
 190 #endif
 191
 192                 class CredentialCacheKey {
 193                         Uri uriPrefix;
 194                         string authType;
 195                         string absPath;
 196                         int len;
 197                         int hash;
 198
 199                         internal CredentialCacheKey (Uri uriPrefix, string authType)
 200                         {
 201                                 this.uriPrefix = uriPrefix;
 202                                 this.authType = authType;
 203
 204                                 this.absPath = uriPrefix.AbsolutePath;
 205                                 this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
 206
 207                                 this.len = uriPrefix.AbsoluteUri.Length;
 208                                 this.hash = uriPrefix.GetHashCode ()
 209                                           + authType.GetHashCode ();
 210                         }
 211
 212                         public int Length {
 213                                 get { return len; }
 214                         }
 215
 216                         public string AbsPath {
 217                                 get { return absPath; }
 218                         }
 219
 220                         public Uri UriPrefix {
 221                                 get { return uriPrefix; }
 222                         }
 223
 224                         public string AuthType {
 225                                 get { return authType; }
 226                         }
 227
 228                         public override int GetHashCode ()
 229                         {
 230                                 return hash;
 231                         }
 232
 233                         public override bool Equals (object obj)
 234                         {
 235                                 CredentialCacheKey key = obj as CredentialCacheKey;
 236                                 return ((key != null) && (this.hash == key.hash));
 237                         }
 238
 239                         public override string ToString ()
 240                         {
 241                                 return absPath + " : " + authType + " : len=" + len;
 242                         }
 243                 }
 244
 245 #if NET_2_0
 246                 class CredentialCacheForHostKey {
 247                         string host;
 248                         int port;
 249                         string authType;
 250                         int hash;
 251
 252                         internal CredentialCacheForHostKey (string host, int port, string authType)
 253                         {
 254                                 this.host = host;
 255                                 this.port = port;
 256                                 this.authType = authType;
 257
 258                                 this.hash = host.GetHashCode ()
 259                                         + port.GetHashCode ()
 260                                         + authType.GetHashCode ();
 261                         }
 262
 263                         public string Host {
 264                                 get { return host; }
 265                         }
 266
 267                         public int Port {
 268                                 get { return port; }
 269                         }
 270
 271                         public string AuthType {
 272                                 get { return authType; }
 273                         }
 274
 275                 public override int GetHashCode ()
 276                 {
 277                         return hash;
 278                 }
 279
 280                 public override bool Equals (object obj)
 281                 {
 282                         CredentialCacheForHostKey key = obj as CredentialCacheForHostKey;
 283                         return ((key != null) && (this.hash == key.hash));
 284                 }
 285
 286                 public override string ToString ()
 287                 {
 288                         return host + " : " + authType;
 289                 }
 290         }
 291 #endif
 292 }
 293 }
 294
 295