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
  42                 public CredentialCache ()
  43                 {
  44                         cache = new Hashtable ();
  45                 }
  46
  47                 [MonoTODO ("Need EnvironmentPermission implementation first")]
  48                 public static ICredentials DefaultCredentials {
  49                         get {
  50                                 // This is used for NTLM, Kerberos and Negotiate under MS
  51                                 return empty;
  52                         }
  53                 }
  54
  55 #if NET_2_0
  56                 // MS does might return a special ICredentials which does not allow getting the
  57                 // username/password information out of it for non-internal classes.
  58                 public static NetworkCredential DefaultNetworkCredentials {
  59                         get { return empty; }
  60                 }
  61 #endif
  62
  63                 public NetworkCredential GetCredential (Uri uriPrefix, string authType)
  64                 {
  65                         int longestPrefix = -1;
  66                         NetworkCredential result = null;
  67
  68                         if (uriPrefix == null || authType == null)
  69                                 return null;
  70
  71                         string absPath = uriPrefix.AbsolutePath;
  72                         absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
  73
  74                         IDictionaryEnumerator e = cache.GetEnumerator ();
  75                         while (e.MoveNext ()) {
  76                                 CredentialCacheKey key = e.Key as CredentialCacheKey;
  77
  78                                 if (key.Length <= longestPrefix)
  79                                         continue;
  80
  81                                 if (String.Compare (key.AuthType, authType, true) != 0)
  82                                         continue;
  83
  84                                 Uri cachedUri = key.UriPrefix;
  85
  86                                 if (cachedUri.Scheme != uriPrefix.Scheme)
  87                                         continue;
  88
  89                                 if (cachedUri.Port != uriPrefix.Port)
  90                                         continue;
  91
  92                                 if (cachedUri.Host != uriPrefix.Host)
  93                                         continue;
  94
  95                                 if (!absPath.StartsWith (key.AbsPath))
  96                                         continue;
  97
  98                                 longestPrefix = key.Length;
  99                                 result = (NetworkCredential) e.Value;
 100                         }
 101
 102                         return result;
 103                 }
 104
 105                 public IEnumerator GetEnumerator ()
 106                 {
 107                         return cache.Values.GetEnumerator ();
 108                 }
 109
 110                 public void Add (Uri uriPrefix, string authType, NetworkCredential cred)
 111                 {
 112                         if (uriPrefix == null)
 113                                 throw new ArgumentNullException ("uriPrefix");
 114
 115                         if (authType == null)
 116                                 throw new ArgumentNullException ("authType");
 117
 118                         // throws ArgumentException when same key already exists.
 119                         cache.Add (new CredentialCacheKey (uriPrefix, authType), cred);
 120                 }
 121
 122                 public void Remove (Uri uriPrefix, string authType)
 123                 {
 124                         if (uriPrefix == null)
 125                                 throw new ArgumentNullException ("uriPrefix");
 126
 127                         if (authType == null)
 128                                 throw new ArgumentNullException ("authType");
 129
 130                         cache.Remove (new CredentialCacheKey (uriPrefix, authType));
 131                 }
 132
 133 #if NET_2_0
 134                 [MonoNotSupported ("")]
 135                 public void Add (string host, int port, string authenticationType, NetworkCredential credential)
 136                 {
 137                         throw new NotImplementedException ();
 138                 }
 139
 140                 [MonoNotSupported ("")]
 141                 public NetworkCredential GetCredential (string host, int port, string authenticationType)
 142                 {
 143                         throw new NotImplementedException ();
 144                 }
 145
 146                 [MonoNotSupported ("")]
 147                 public void Remove (string host, int port, string authenticationType)
 148                 {
 149                         throw new NotImplementedException ();
 150                 }
 151 #endif
 152
 153                 class CredentialCacheKey {
 154                         Uri uriPrefix;
 155                         string authType;
 156                         string absPath;
 157                         int len;
 158                         int hash;
 159
 160                         internal CredentialCacheKey (Uri uriPrefix, string authType)
 161                         {
 162                                 this.uriPrefix = uriPrefix;
 163                                 this.authType = authType;
 164
 165                                 this.absPath = uriPrefix.AbsolutePath;
 166                                 this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
 167
 168                                 this.len = uriPrefix.AbsoluteUri.Length;
 169                                 this.hash = uriPrefix.GetHashCode ()
 170                                           + authType.GetHashCode ();
 171                         }
 172
 173                         public int Length {
 174                                 get { return len; }
 175                         }
 176
 177                         public string AbsPath {
 178                                 get { return absPath; }
 179                         }
 180
 181                         public Uri UriPrefix {
 182                                 get { return uriPrefix; }
 183                         }
 184
 185                         public string AuthType {
 186                                 get { return authType; }
 187                         }
 188
 189                         public override int GetHashCode ()
 190                         {
 191                                 return hash;
 192                         }
 193
 194                         public override bool Equals (object obj)
 195                         {
 196                                 CredentialCacheKey key = obj as CredentialCacheKey;
 197                                 return ((key != null) && (this.hash == key.hash));
 198                         }
 199
 200                         public override string ToString ()
 201                         {
 202                                 return absPath + " : " + authType + " : len=" + len;
 203                         }
 204                 }
 205         }
 206 }
 207
 208