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

   1 #if NET_1_0
   2 #endif
   3 #if NET_1_1
   4 //
   5 // System.Xml.XmlSecureResolver.cs
   6 //
   7 // Author: Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
   8 //
   9 // (C) 2003 Atsushi Enomoto
  10 //
  11 using System;
  12 using System.Net;
  13 using System.Security;
  14 using System.Security.Policy;
  15 using System.Security.Permissions;
  16
  17 namespace System.Xml
  18 {
  19         public class XmlSecureResolver : XmlResolver
  20         {
  21
  22 #region Static Members
  23
  24                 public static Evidence CreateEvidenceForUrl (string securityUrl)
  25                 {
  26                         Evidence e = new Evidence ();
  27                         Url url = null;
  28                         Zone zone = null;
  29                         Site site = null;
  30
  31                         try {
  32                                 url = new Url (securityUrl);
  33                         } catch (ArgumentException) {
  34                         }
  35
  36                         try {
  37                                 zone = Zone.CreateFromUrl (securityUrl);
  38                         } catch (ArgumentException) {
  39                         }
  40
  41                         try {
  42                                 site = Site.CreateFromUrl (securityUrl);
  43                         } catch (ArgumentException) {
  44                         }
  45
  46                         if (url != null)
  47                                 e.AddHost (url);
  48                         if (zone != null)
  49                                 e.AddHost (zone);
  50                         if (site != null)
  51                                 e.AddHost (site);
  52
  53                         return e;
  54                 }
  55 #endregion
  56
  57                 XmlResolver resolver;
  58                 PermissionSet permissionSet;
  59 //              Evidence evidence;
  60
  61 #region .ctor and Finalizer
  62
  63                 public XmlSecureResolver (
  64                         XmlResolver resolver, Evidence evidence)
  65                 {
  66                         this.resolver = resolver;
  67 //                      this.evidence = evidence;
  68                         this.permissionSet = SecurityManager.ResolvePolicy (evidence);
  69                 }
  70
  71                 public XmlSecureResolver (
  72                         XmlResolver resolver, PermissionSet permissionSet)
  73                 {
  74                         this.resolver = resolver;
  75                         this.permissionSet = permissionSet;
  76                 }
  77
  78                 public XmlSecureResolver (
  79                         XmlResolver resolver, string securityUrl)
  80                         : this (resolver, CreateEvidenceForUrl (securityUrl))
  81                 {
  82                 }
  83 #endregion
  84
  85 #region Property
  86
  87                 public override ICredentials Credentials {
  88                         set { resolver.Credentials = value; }
  89                 }
  90
  91 #endregion
  92
  93 #region Methods
  94
  95                 public override object GetEntity (
  96                         Uri absoluteUri, string role, Type ofObjectToReturn)
  97                 {
  98                         permissionSet.PermitOnly ();
  99                         return resolver.GetEntity (absoluteUri, role, ofObjectToReturn);
 100                 }
 101
 102                 public override Uri ResolveUri (Uri baseUri, string relativeUri)
 103                 {
 104                         return resolver.ResolveUri (baseUri, relativeUri);
 105                 }
 106 #endregion
 107
 108         }
 109 }
 110 #endif