mcs/class/System.Security/System.Security.Cryptography.Xml/Transform.cs

   1 //
   2 // Transform.cs - Transform implementation for XML Signature
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //      Atsushi Enomoto <atsushi@ximian.com>
   7 //
   8 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   9 // (C) 2004 Novell (http://www.novell.com)
  10 //
  11
  12 using System.Runtime.InteropServices;
  13 using System.Security.Policy;
  14 using System.Xml;
  15
  16 namespace System.Security.Cryptography.Xml {
  17
  18         public abstract class Transform {
  19
  20                 private string algo;
  21                 private XmlResolver xmlResolver;
  22
  23                 public Transform ()
  24                 {
  25                 // FIXME: enable it after CAS implementation
  26 #if false // NET_1_1
  27                         xmlResolver = new XmlSecureResolver (new XmlUrlResolver (), (Evidence) new Evidence ());
  28 #else
  29                         xmlResolver = new XmlUrlResolver ();
  30 #endif
  31                 }
  32
  33                 public string Algorithm {
  34                         get { return algo; }
  35                         set { algo = value; }
  36                 }
  37
  38                 public abstract Type[] InputTypes {
  39                         get;
  40                 }
  41
  42                 public abstract Type[] OutputTypes {
  43                         get;
  44                 }
  45
  46                 protected abstract XmlNodeList GetInnerXml ();
  47
  48                 public abstract object GetOutput ();
  49
  50                 public abstract object GetOutput (Type type);
  51
  52                 public XmlElement GetXml ()
  53                 {
  54                         XmlDocument document = new XmlDocument ();
  55                         document.XmlResolver = GetResolver ();
  56                         XmlElement xel = document.CreateElement (XmlSignature.ElementNames.Transform, XmlSignature.NamespaceURI);
  57                         xel.SetAttribute (XmlSignature.AttributeNames.Algorithm, algo);
  58                         XmlNodeList xnl = this.GetInnerXml ();
  59                         if (xnl != null) {
  60                                 foreach (XmlNode xn in xnl) {
  61                                         XmlNode importedNode = document.ImportNode (xn, true);
  62                                         xel.AppendChild (importedNode);
  63                                 }
  64                         }
  65                         return xel;
  66                 }
  67
  68                 public abstract void LoadInnerXml (XmlNodeList nodeList);
  69
  70                 public abstract void LoadInput (object obj);
  71
  72                 internal XmlResolver GetResolver ()
  73                 {
  74                         return xmlResolver;
  75                 }
  76
  77 #if NET_1_1
  78                 [ComVisible(false)]
  79                 public XmlResolver Resolver {
  80                         set { xmlResolver = value; }
  81                 }
  82 #endif
  83         }
  84 }