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                 static NetworkCredential empty = new NetworkCredential ("", "", "");
  36                 Hashtable cache;
  37
  38                 public CredentialCache ()
  39                 {
  40                         cache = new Hashtable ();
  41                 }
  42
  43                 [MonoTODO ("Need EnvironmentPermission implementation first")]
  44                 public static ICredentials DefaultCredentials {
  45                         get {
  46                                 // This is used for NTLM, Kerberos and Negotiate under MS
  47                                 return empty;
  48                         }
  49                 }
  50
  51 #if NET_2_0
  52                 // MS does might return a special ICredentials which does not allow getting the
  53                 // username/password information out of it for non-internal classes.
  54                 public static NetworkCredential DefaultNetworkCredentials {
  55                         get { return empty; }
  56                 }
  57 #endif
  58
  59                 public NetworkCredential GetCredential (Uri uriPrefix, string authType)
  60                 {
  61                         int longestPrefix = -1;
  62                         NetworkCredential result = null;
  63
  64                         if (uriPrefix == null || authType == null)
  65                                 return null;
  66
  67                         string absPath = uriPrefix.AbsolutePath;
  68                         absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
  69
  70                         IDictionaryEnumerator e = cache.GetEnumerator ();
  71                         while (e.MoveNext ()) {
  72                                 CredentialCacheKey key = e.Key as CredentialCacheKey;
  73
  74                                 if (key.Length <= longestPrefix)
  75                                         continue;
  76
  77                                 if (String.Compare (key.AuthType, authType, true) != 0)
  78                                         continue;
  79
  80                                 Uri cachedUri = key.UriPrefix;
  81
  82                                 if (cachedUri.Scheme != uriPrefix.Scheme)
  83                                         continue;
  84
  85                                 if (cachedUri.Port != uriPrefix.Port)
  86                                         continue;
  87
  88                                 if (cachedUri.Host != uriPrefix.Host)
  89                                         continue;
  90
  91                                 if (!absPath.StartsWith (key.AbsPath))
  92                                         continue;
  93
  94                                 longestPrefix = key.Length;
  95                                 result = (NetworkCredential) e.Value;
  96                         }
  97
  98                         return result;
  99                 }
 100
 101                 public IEnumerator GetEnumerator ()
 102                 {
 103                         return cache.Values.GetEnumerator ();
 104                 }
 105
 106                 public void Add (Uri uriPrefix, string authType, NetworkCredential cred)
 107                 {
 108                         if (uriPrefix == null)
 109                                 throw new ArgumentNullException ("uriPrefix");
 110
 111                         if (authType == null)
 112                                 throw new ArgumentNullException ("authType");
 113
 114                         // throws ArgumentException when same key already exists.
 115                         cache.Add (new CredentialCacheKey (uriPrefix, authType), cred);
 116                 }
 117
 118                 public void Remove (Uri uriPrefix, string authType)
 119                 {
 120                         if (uriPrefix == null)
 121                                 throw new ArgumentNullException ("uriPrefix");
 122
 123                         if (authType == null)
 124                                 throw new ArgumentNullException ("authType");
 125
 126                         cache.Remove (new CredentialCacheKey (uriPrefix, authType));
 127                 }
 128
 129                 class CredentialCacheKey {
 130                         Uri uriPrefix;
 131                         string authType;
 132                         string absPath;
 133                         int len;
 134                         int hash;
 135
 136                         internal CredentialCacheKey (Uri uriPrefix, string authType)
 137                         {
 138                                 this.uriPrefix = uriPrefix;
 139                                 this.authType = authType;
 140
 141                                 this.absPath = uriPrefix.AbsolutePath;
 142                                 this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
 143
 144                                 this.len = uriPrefix.AbsoluteUri.Length;
 145                                 this.hash = uriPrefix.GetHashCode ()
 146                                           + authType.ToString ().GetHashCode ();
 147                         }
 148
 149                         public int Length {
 150                                 get { return len; }
 151                         }
 152
 153                         public string AbsPath {
 154                                 get { return absPath; }
 155                         }
 156
 157                         public Uri UriPrefix {
 158                                 get { return uriPrefix; }
 159                         }
 160
 161                         public string AuthType {
 162                                 get { return authType; }
 163                         }
 164
 165                         public override int GetHashCode ()
 166                         {
 167                                 return hash;
 168                         }
 169
 170                         public override bool Equals (object obj)
 171                         {
 172                                 CredentialCacheKey key = obj as CredentialCacheKey;
 173                                 return ((key != null) && (this.hash == key.hash));
 174                         }
 175
 176                         public override string ToString ()
 177                         {
 178                                 return absPath + " : " + authType + " : len=" + len;
 179                         }
 180                 }
 181         }
 182 }
 183