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 {
  35         public class CredentialCache : ICredentials, IEnumerable
  36         {
  37                 // Fields
  38                 private Hashtable cache;
  39
  40                 // Constructors
  41                 public CredentialCache ()
  42                 {
  43                         cache = new Hashtable ();
  44                 }
  45
  46                 // Properties
  47
  48                 [MonoTODO ("Need EnvironmentPermission implementation first")]
  49                 public static ICredentials DefaultCredentials {
  50                         get {
  51                                 // This is used for NTLM, Kerberos and Negotiate under MS
  52                                 return null;
  53                         }
  54                 }
  55
  56
  57                 // ICredentials
  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                 // IEnumerable
 102
 103                 public IEnumerator GetEnumerator ()
 104                 {
 105                         return cache.Values.GetEnumerator ();
 106                 }
 107
 108                 // Methods
 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                 // Inner Classes
 134
 135                 internal class CredentialCacheKey
 136                 {
 137                         private Uri uriPrefix;
 138                         private string authType;
 139
 140                         private string absPath;
 141                         private int len;
 142                         private int hash;
 143
 144                         internal CredentialCacheKey (Uri uriPrefix, string authType)
 145                         {
 146                                 this.uriPrefix = uriPrefix;
 147                                 this.authType = authType;
 148
 149                                 this.absPath = uriPrefix.AbsolutePath;
 150                                 this.absPath = absPath.Substring (0, absPath.LastIndexOf ('/'));
 151
 152                                 this.len = uriPrefix.AbsoluteUri.Length;
 153                                 this.hash = uriPrefix.GetHashCode ()
 154                                           + authType.ToString ().GetHashCode ();
 155                         }
 156
 157                         public int Length {
 158                                 get { return len; }
 159                         }
 160
 161                         public string AbsPath {
 162                                 get { return absPath; }
 163                         }
 164
 165                         public Uri UriPrefix {
 166                                 get { return uriPrefix; }
 167                         }
 168
 169                         public string AuthType {
 170                                 get { return authType; }
 171                         }
 172
 173                         public override int GetHashCode ()
 174                         {
 175                                 return hash;
 176                         }
 177
 178                         public override bool Equals (object obj)
 179                         {
 180                                 CredentialCacheKey key = obj as CredentialCacheKey;
 181                                 return ((key != null) && (this.hash == key.hash));
 182                         }
 183
 184                         public override string ToString ()
 185                         {
 186                                 return absPath + " : " + authType + " : len=" + len;
 187                         }
 188                 }
 189         }
 190 }
 191