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, ICredentialsByHost
  35         {
  36                 static NetworkCredential empty = new NetworkCredential (String.Empty, String.Empty, String.Empty);
  37                 Hashtable cache;
  38                 Hashtable cacheForHost;
  39
  40                 public CredentialCache ()
  41                 {
  42                         cache = new Hashtable ();
  43                         cacheForHost = new Hashtable ();
  44                 }
  45
  46                 [MonoTODO ("Need EnvironmentPermission implementation first")]
  47                 public static ICredentials DefaultCredentials {
  48                         get {
  49                                 // This is used for NTLM, Kerberos and Negotiate under MS
  50                                 return empty;
  51                         }
  52                 }
  53
  54                 // MS does might return a special ICredentials which does not allow getting the
  55                 // username/password information out of it for non-internal classes.
  56                 public static NetworkCredential DefaultNetworkCredentials {
  57                         get { return empty; }
  58                 }
  59
  60                 public NetworkCredential GetCredential (Uri uriPrefix, string authType)
  61                 {
  62                         int longestPrefix = -1;
  63                         NetworkCredential result = null;
  64
  65                         if (uriPrefix == null || authType == null)
  66                                 return null;
  67
  68                         string absPath = uriPrefix.AbsolutePath;
  69                         absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
  70
  71                         IDictionaryEnumerator e = cache.GetEnumerator ();
  72                         while (e.MoveNext ()) {
  73                                 CredentialCacheKey key = e.Key as CredentialCacheKey;
  74
  75                                 if (key.Length <= longestPrefix)
  76                                         continue;
  77
  78                                 if (String.Compare (key.AuthType, authType, true) != 0)
  79                                         continue;
  80
  81                                 Uri cachedUri = key.UriPrefix;
  82
  83                                 if (cachedUri.Scheme != uriPrefix.Scheme)
  84                                         continue;
  85
  86                                 if (cachedUri.Port != uriPrefix.Port)
  87                                         continue;
  88
  89                                 if (cachedUri.Host != uriPrefix.Host)
  90                                         continue;
  91
  92                                 if (!absPath.StartsWith (key.AbsPath))
  93                                         continue;
  94
  95                                 longestPrefix = key.Length;
  96                                 result = (NetworkCredential) e.Value;
  97                         }
  98
  99                         return result;
 100                 }
 101
 102                 public IEnumerator GetEnumerator ()
 103                 {
 104                         return cache.Values.GetEnumerator ();
 105                 }
 106
 107                 public void Add (Uri uriPrefix, string authType, NetworkCredential cred)
 108                 {
 109                         if (uriPrefix == null)
 110                                 throw new ArgumentNullException ("uriPrefix");
 111
 112                         if (authType == null)
 113                                 throw new ArgumentNullException ("authType");
 114
 115                         // throws ArgumentException when same key already exists.
 116                         cache.Add (new CredentialCacheKey (uriPrefix, authType), cred);
 117                 }
 118
 119                 public void Remove (Uri uriPrefix, string authType)
 120                 {
 121                         if (uriPrefix == null)
 122                                 throw new ArgumentNullException ("uriPrefix");
 123
 124                         if (authType == null)
 125                                 throw new ArgumentNullException ("authType");
 126
 127                         cache.Remove (new CredentialCacheKey (uriPrefix, authType));
 128                 }
 129
 130                 public NetworkCredential GetCredential (string host, int port, string authenticationType)
 131                 {
 132                         NetworkCredential result = null;
 133
 134                         if (host == null || port < 0 || authenticationType == null)
 135                                 return null;
 136
 137                         IDictionaryEnumerator e = cacheForHost.GetEnumerator ();
 138                         while (e.MoveNext ()) {
 139                                 CredentialCacheForHostKey key = e.Key as CredentialCacheForHostKey;
 140
 141                                 if (String.Compare (key.AuthType, authenticationType, true) != 0)
 142                                         continue;
 143
 144                                 if (key.Host != host)
 145                                         continue;
 146
 147                                 if (key.Port != port)
 148                                         continue;
 149
 150                                 result = (NetworkCredential) e.Value;
 151                         }
 152
 153                         return result;
 154                 }
 155
 156                 public void Add (string host, int port, string authenticationType, NetworkCredential credential)
 157                 {
 158                         if (host == null)
 159                                 throw new ArgumentNullException("host");
 160
 161                         if (port < 0)
 162                                 throw new ArgumentOutOfRangeException("port");
 163
 164                         if (authenticationType == null)
 165                                 throw new ArgumentOutOfRangeException("authenticationType");
 166
 167                         cacheForHost.Add (new CredentialCacheForHostKey (host, port, authenticationType), credential);
 168                 }
 169
 170                 public void Remove (string host, int port, string authenticationType)
 171                 {
 172                         if (host == null)
 173                                 return;
 174
 175                         if (authenticationType == null)
 176                                 return;
 177
 178                         cacheForHost.Remove (new CredentialCacheForHostKey (host, port, authenticationType));
 179                 }
 180
 181                 class CredentialCacheKey {
 182                         Uri uriPrefix;
 183                         string authType;
 184                         string absPath;
 185                         int len;
 186                         int hash;
 187
 188                         internal CredentialCacheKey (Uri uriPrefix, string authType)
 189                         {
 190                                 this.uriPrefix = uriPrefix;
 191                                 this.authType = authType;
 192
 193                                 this.absPath = uriPrefix.AbsolutePath;
 194                                 this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
 195
 196                                 this.len = uriPrefix.AbsoluteUri.Length;
 197                                 this.hash = uriPrefix.GetHashCode ()
 198                                           + authType.GetHashCode ();
 199                         }
 200
 201                         public int Length {
 202                                 get { return len; }
 203                         }
 204
 205                         public string AbsPath {
 206                                 get { return absPath; }
 207                         }
 208
 209                         public Uri UriPrefix {
 210                                 get { return uriPrefix; }
 211                         }
 212
 213                         public string AuthType {
 214                                 get { return authType; }
 215                         }
 216
 217                         public override int GetHashCode ()
 218                         {
 219                                 return hash;
 220                         }
 221
 222                         public override bool Equals (object obj)
 223                         {
 224                                 CredentialCacheKey key = obj as CredentialCacheKey;
 225                                 return ((key != null) && (this.hash == key.hash));
 226                         }
 227
 228                         public override string ToString ()
 229                         {
 230                                 return absPath + " : " + authType + " : len=" + len;
 231                         }
 232                 }
 233
 234                 class CredentialCacheForHostKey {
 235                         string host;
 236                         int port;
 237                         string authType;
 238                         int hash;
 239
 240                         internal CredentialCacheForHostKey (string host, int port, string authType)
 241                         {
 242                                 this.host = host;
 243                                 this.port = port;
 244                                 this.authType = authType;
 245
 246                                 this.hash = host.GetHashCode ()
 247                                         + port.GetHashCode ()
 248                                         + authType.GetHashCode ();
 249                         }
 250
 251                         public string Host {
 252                                 get { return host; }
 253                         }
 254
 255                         public int Port {
 256                                 get { return port; }
 257                         }
 258
 259                         public string AuthType {
 260                                 get { return authType; }
 261                         }
 262
 263                 public override int GetHashCode ()
 264                 {
 265                         return hash;
 266                 }
 267
 268                 public override bool Equals (object obj)
 269                 {
 270                         CredentialCacheForHostKey key = obj as CredentialCacheForHostKey;
 271                         return ((key != null) && (this.hash == key.hash));
 272                 }
 273
 274                 public override string ToString ()
 275                 {
 276                         return host + " : " + authType;
 277                 }
 278         }
 279 }
 280 }
 281
 282