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

   1 //
   2 // Manifest.cs - Manifest implementation for XML Signature
   3 //
   4 // Author:
   5 //      Sebastien Pouliot  <sebastien@ximian.com>
   6 //
   7 // (C) 2004 Novell (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Collections;
  32 using System.Xml;
  33
  34 namespace System.Security.Cryptography.Xml {
  35
  36         internal class Manifest {
  37
  38                 private ArrayList references;
  39                 private string id;
  40                 private XmlElement element;
  41
  42                 public Manifest ()
  43                 {
  44                         references = new ArrayList ();
  45                 }
  46
  47                 public Manifest (XmlElement xel) : this ()
  48                 {
  49                         LoadXml (xel);
  50                 }
  51
  52                 public string Id {
  53                         get { return id; }
  54                         set {
  55                                 element = null;
  56                                 id = value;
  57                         }
  58                 }
  59
  60                 public ArrayList References {
  61                         get { return references; }
  62                 }
  63
  64                 public void AddReference (Reference reference)
  65                 {
  66                         references.Add (reference);
  67                 }
  68
  69                 public XmlElement GetXml ()
  70                 {
  71                         if (element != null)
  72                                 return element;
  73
  74                         XmlDocument document = new XmlDocument ();
  75                         XmlElement xel = document.CreateElement (XmlSignature.ElementNames.SignedInfo, XmlSignature.NamespaceURI);
  76                         if (id != null)
  77                                 xel.SetAttribute (XmlSignature.AttributeNames.Id, id);
  78
  79                         // we add References afterward so we don't end up with extraneous
  80                         // xmlns="..." in each reference elements.
  81                         foreach (Reference r in references) {
  82                                 XmlNode xn = r.GetXml ();
  83                                 XmlNode newNode = document.ImportNode (xn, true);
  84                                 xel.AppendChild (newNode);
  85                         }
  86
  87                         return xel;
  88                 }
  89
  90                 private string GetAttribute (XmlElement xel, string attribute)
  91                 {
  92                         XmlAttribute xa = xel.Attributes [attribute];
  93                         return ((xa != null) ? xa.InnerText : null);
  94                 }
  95
  96                 public void LoadXml (XmlElement value)
  97                 {
  98                         if (value == null)
  99                                 throw new ArgumentNullException ("value");
 100
 101                         if ((value.LocalName != XmlSignature.ElementNames.Manifest) || (value.NamespaceURI != XmlSignature.NamespaceURI))
 102                                 throw new CryptographicException ();
 103
 104                         id = GetAttribute (value, XmlSignature.AttributeNames.Id);
 105
 106                         for (int i = 0; i < value.ChildNodes.Count; i++) {
 107                                 XmlNode n = value.ChildNodes [i];
 108                                 if (n.NodeType == XmlNodeType.Element &&
 109                                         n.LocalName == XmlSignature.ElementNames.Reference &&
 110                                         n.NamespaceURI == XmlSignature.NamespaceURI) {
 111                                         Reference r = new Reference ();
 112                                         r.LoadXml ((XmlElement) n);
 113                                         AddReference (r);
 114                                 }
 115                         }
 116                         element = value;
 117                 }
 118         }
 119 }