mcs/class/System.Security/System.Security.Cryptography.Xml/XmlDsigExcC14NTransform.cs

   1 //
   2 // XmlDsigExcC14NTransform.cs - ExcC14N Transform implementation for XML Signature
   3 // http://www.w3.org/TR/xml-c14n
   4 //
   5 // Authors:
   6 //      Sebastien Pouliot <sebastien@ximian.com>
   7 //      Aleksey Sanin (aleksey@aleksey.com)
   8 //      Tim Coleman (tim@timcoleman.com)
   9 //
  10 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
  11 // (C) 2003 Aleksey Sanin (aleksey@aleksey.com)
  12 // Copyright (C) Tim Coleman, 2004
  13 // Copyright (C) 2004-2005 Novell Inc. (http://www.novell.com)
  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.Text;
  39 using System.Xml;
  40
  41 using Mono.Xml;
  42
  43 namespace System.Security.Cryptography.Xml {
  44
  45         public class XmlDsigExcC14NTransform : Transform {
  46                 private Type[] input;
  47                 private Type[] output;
  48                 private XmlCanonicalizer canonicalizer;
  49                 private Stream s;
  50                 private string inclusiveNamespacesPrefixList;
  51
  52                 public XmlDsigExcC14NTransform ()
  53                         : this (false, null)
  54                 {
  55                 }
  56
  57                 public XmlDsigExcC14NTransform (bool includeComments)
  58                         : this (includeComments, null)
  59                 {
  60                 }
  61
  62                 public XmlDsigExcC14NTransform (string inclusiveNamespacesPrefixList)
  63                         : this (false, inclusiveNamespacesPrefixList)
  64                 {
  65                 }
  66
  67                 public XmlDsigExcC14NTransform (bool includeComments, string inclusiveNamespacesPrefixList)
  68                 {
  69                         if (includeComments)
  70                                 Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NWithCommentsTransform;
  71                         else
  72                                 Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NTransform;
  73                         this.inclusiveNamespacesPrefixList = inclusiveNamespacesPrefixList;
  74                         canonicalizer = new XmlCanonicalizer (includeComments, true, PropagatedNamespaces);
  75                 }
  76
  77                 public string InclusiveNamespacesPrefixList {
  78                         get { return inclusiveNamespacesPrefixList; }
  79                         set { inclusiveNamespacesPrefixList = value; }
  80                 }
  81
  82                 public override Type[] InputTypes {
  83                         get {
  84                                 if (input == null) {
  85                                         input = new Type [3];
  86                                         input[0] = typeof (System.IO.Stream);
  87                                         input[1] = typeof (System.Xml.XmlDocument);
  88                                         input[2] = typeof (System.Xml.XmlNodeList);
  89                                 }
  90                                 return input;
  91                         }
  92                 }
  93
  94                 public override Type[] OutputTypes {
  95                         get {
  96                                 if (output == null) {
  97                                         output = new Type [1];
  98                                         output[0] = typeof (System.IO.Stream);
  99                                 }
 100                                 return output;
 101                         }
 102                 }
 103
 104                 protected override XmlNodeList GetInnerXml ()
 105                 {
 106                         return null; // THIS IS DOCUMENTED AS SUCH
 107                 }
 108
 109                 public override byte[] GetDigestedOutput (HashAlgorithm hash)
 110                 {
 111                         // no null check, MS throws a NullReferenceException here
 112                         return hash.ComputeHash ((Stream) GetOutput ());
 113                 }
 114
 115                 public override object GetOutput ()
 116                 {
 117                         return (object) s;
 118                 }
 119
 120                 public override object GetOutput (Type type)
 121                 {
 122                         if (type == typeof (Stream))
 123                                 return GetOutput ();
 124                         throw new ArgumentException ("type");
 125                 }
 126
 127                 public override void LoadInnerXml (XmlNodeList nodeList)
 128                 {
 129                         // documented as not changing the state of the transform
 130                 }
 131
 132                 public override void LoadInput (object obj)
 133                 {
 134                         canonicalizer.InclusiveNamespacesPrefixList = InclusiveNamespacesPrefixList;
 135                         // possible input: Stream, XmlDocument, and XmlNodeList
 136                         Stream stream = (obj as Stream);
 137                         if (stream != null) {
 138                                 XmlDocument doc = new XmlDocument ();
 139                                 doc.PreserveWhitespace = true;  // REALLY IMPORTANT
 140                                 doc.XmlResolver = GetResolver ();
 141                                 doc.Load (new XmlSignatureStreamReader (new StreamReader (stream)));
 142 //                              doc.Load ((Stream) obj);
 143                                 s = canonicalizer.Canonicalize (doc);
 144                                 return;
 145                         }
 146
 147                         XmlDocument xd = (obj as XmlDocument);
 148                         if (xd != null) {
 149                                 s = canonicalizer.Canonicalize (xd);
 150                                 return;
 151                         }
 152
 153                         XmlNodeList nl = (obj as XmlNodeList);
 154                         if (nl != null) {
 155                                 s = canonicalizer.Canonicalize (nl);
 156                         }
 157                         else
 158                                 throw new ArgumentException ("obj");
 159                 }
 160         }
 161 }
 162