mcs/class/System.XML/System.Xml/XmlSecureResolver.cs

   1
   2 //
   3 // Permission is hereby granted, free of charge, to any person obtaining
   4 // a copy of this software and associated documentation files (the
   5 // "Software"), to deal in the Software without restriction, including
   6 // without limitation the rights to use, copy, modify, merge, publish,
   7 // distribute, sublicense, and/or sell copies of the Software, and to
   8 // permit persons to whom the Software is furnished to do so, subject to
   9 // the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be
  12 // included in all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  15 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  17 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  18 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  19 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  20 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21 //
  22 #if NET_1_0
  23 #endif
  24 #if NET_1_1
  25 //
  26 // System.Xml.XmlSecureResolver.cs
  27 //
  28 // Author: Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
  29 //
  30 // (C) 2003 Atsushi Enomoto
  31 //
  32 using System;
  33 using System.Net;
  34 using System.Security;
  35 using System.Security.Policy;
  36 using System.Security.Permissions;
  37
  38 namespace System.Xml
  39 {
  40         public class XmlSecureResolver : XmlResolver
  41         {
  42
  43 #region Static Members
  44
  45                 public static Evidence CreateEvidenceForUrl (string securityUrl)
  46                 {
  47                         Evidence e = new Evidence ();
  48                         Url url = null;
  49                         Zone zone = null;
  50                         Site site = null;
  51
  52                         if (securityUrl != null) {
  53                                 try {
  54                                         if (securityUrl.Length > 0)
  55                                                 url = new Url (securityUrl);
  56                                 } catch (ArgumentException) {
  57                                 }
  58
  59                                 try {
  60                                         zone = Zone.CreateFromUrl (securityUrl);
  61                                 } catch (ArgumentException) {
  62                                 }
  63
  64                                 try {
  65                                         if (securityUrl.Length > 0)
  66                                                 site = Site.CreateFromUrl (securityUrl);
  67                                 } catch (ArgumentException) {
  68                                 }
  69                         }
  70
  71                         if (url != null)
  72                                 e.AddHost (url);
  73                         if (zone != null)
  74                                 e.AddHost (zone);
  75                         if (site != null)
  76                                 e.AddHost (site);
  77
  78                         return e;
  79                 }
  80 #endregion
  81
  82                 XmlResolver resolver;
  83                 PermissionSet permissionSet;
  84 //              Evidence evidence;
  85
  86 #region .ctor and Finalizer
  87
  88                 public XmlSecureResolver (
  89                         XmlResolver resolver, Evidence evidence)
  90                 {
  91                         this.resolver = resolver;
  92 //                      this.evidence = evidence;
  93                         this.permissionSet = SecurityManager.ResolvePolicy (evidence);
  94                 }
  95
  96                 public XmlSecureResolver (
  97                         XmlResolver resolver, PermissionSet permissionSet)
  98                 {
  99                         this.resolver = resolver;
 100                         this.permissionSet = permissionSet;
 101                 }
 102
 103                 public XmlSecureResolver (
 104                         XmlResolver resolver, string securityUrl)
 105                         : this (resolver, CreateEvidenceForUrl (securityUrl))
 106                 {
 107                 }
 108 #endregion
 109
 110 #region Property
 111
 112                 public override ICredentials Credentials {
 113                         set { resolver.Credentials = value; }
 114                 }
 115
 116 #endregion
 117
 118 #region Methods
 119
 120                 public override object GetEntity (
 121                         Uri absoluteUri, string role, Type ofObjectToReturn)
 122                 {
 123                         permissionSet.PermitOnly ();
 124                         return resolver.GetEntity (absoluteUri, role, ofObjectToReturn);
 125                 }
 126
 127                 public override Uri ResolveUri (Uri baseUri, string relativeUri)
 128                 {
 129                         return resolver.ResolveUri (baseUri, relativeUri);
 130                 }
 131 #endregion
 132
 133         }
 134 }
 135 #endif