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 //      Tim Coleman <tim@timcoleman.com>
   8 //
   9 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
  10 // Copyright (C) Tim Coleman, 2004
  11 // (C) 2004 Novell (http://www.novell.com)
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.Collections;
  36 using System.IO;
  37 using System.Runtime.InteropServices;
  38 using System.Security.Policy;
  39 using System.Xml;
  40
  41 namespace System.Security.Cryptography.Xml {
  42
  43         public abstract class Transform {
  44
  45                 private string algo;
  46                 private XmlResolver xmlResolver;
  47
  48                 public Transform ()
  49                 {
  50                 // FIXME: enable it after CAS implementation
  51 #if false // NET_1_1
  52                         xmlResolver = new XmlSecureResolver (new XmlUrlResolver (), (Evidence) new Evidence ());
  53 #else
  54                         xmlResolver = new XmlUrlResolver ();
  55 #endif
  56                 }
  57
  58                 #region Properties
  59
  60                 public string Algorithm {
  61                         get { return algo; }
  62                         set { algo = value; }
  63                 }
  64
  65                 public abstract Type[] InputTypes {
  66                         get;
  67                 }
  68
  69                 public abstract Type[] OutputTypes {
  70                         get;
  71                 }
  72
  73 #if NET_1_1
  74                 [ComVisible(false)]
  75                 public XmlResolver Resolver {
  76                         set { xmlResolver = value; }
  77                 }
  78 #endif
  79
  80 #if NET_2_0
  81                 [MonoTODO]
  82                 public XmlElement Context {
  83                         get { throw new NotImplementedException (); }
  84                         set { throw new NotImplementedException (); }
  85                 }
  86
  87                 [MonoTODO]
  88                 public Hashtable PropagatedNamespaces {
  89                         get { throw new NotImplementedException (); }
  90                         set { throw new NotImplementedException (); }
  91                 }
  92 #endif
  93
  94                 #endregion // Properties
  95
  96                 #region Methods
  97 #if NET_2_0
  98                 public virtual byte[] GetDigestedOutput (HashAlgorithm hash)
  99                 {
 100                         return hash.ComputeHash ((Stream) GetOutput (typeof (Stream)));
 101                 }
 102 #endif
 103
 104                 protected abstract XmlNodeList GetInnerXml ();
 105
 106                 public abstract object GetOutput ();
 107
 108                 public abstract object GetOutput (Type type);
 109
 110                 public XmlElement GetXml ()
 111                 {
 112                         XmlDocument document = new XmlDocument ();
 113                         document.XmlResolver = GetResolver ();
 114                         XmlElement xel = document.CreateElement (XmlSignature.ElementNames.Transform, XmlSignature.NamespaceURI);
 115                         xel.SetAttribute (XmlSignature.AttributeNames.Algorithm, algo);
 116                         XmlNodeList xnl = this.GetInnerXml ();
 117                         if (xnl != null) {
 118                                 foreach (XmlNode xn in xnl) {
 119                                         XmlNode importedNode = document.ImportNode (xn, true);
 120                                         xel.AppendChild (importedNode);
 121                                 }
 122                         }
 123                         return xel;
 124                 }
 125
 126                 public abstract void LoadInnerXml (XmlNodeList nodeList);
 127
 128                 public abstract void LoadInput (object obj);
 129
 130                 internal XmlResolver GetResolver ()
 131                 {
 132                         return xmlResolver;
 133                 }
 134
 135                 #endregion // Methods
 136         }
 137 }