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 #if NET_2_0
  35
  36 using System.Collections;
  37 using System.IO;
  38 using System.Runtime.InteropServices;
  39 using System.Text;
  40 using System.Xml;
  41
  42 using Mono.Xml;
  43
  44 namespace System.Security.Cryptography.Xml {
  45
  46         public class XmlDsigExcC14NTransform : Transform {
  47                 private Type[] input;
  48                 private Type[] output;
  49                 private XmlCanonicalizer canonicalizer;
  50                 private Stream s;
  51                 private string inclusiveNamespacesPrefixList;
  52
  53                 public XmlDsigExcC14NTransform ()
  54                         : this (false, null)
  55                 {
  56                 }
  57
  58                 public XmlDsigExcC14NTransform (bool includeComments)
  59                         : this (includeComments, null)
  60                 {
  61                 }
  62
  63                 public XmlDsigExcC14NTransform (string inclusiveNamespacesPrefixList)
  64                         : this (false, inclusiveNamespacesPrefixList)
  65                 {
  66                 }
  67
  68                 public XmlDsigExcC14NTransform (bool includeComments, string inclusiveNamespacesPrefixList)
  69                 {
  70                         if (includeComments)
  71                                 Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NWithCommentsTransform;
  72                         else
  73                                 Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NTransform;
  74                         this.inclusiveNamespacesPrefixList = inclusiveNamespacesPrefixList;
  75                         canonicalizer = new XmlCanonicalizer (includeComments, true, PropagatedNamespaces);
  76                 }
  77
  78                 public string InclusiveNamespacesPrefixList {
  79                         get { return inclusiveNamespacesPrefixList; }
  80                         set { inclusiveNamespacesPrefixList = value; }
  81                 }
  82
  83                 public override Type[] InputTypes {
  84                         get {
  85                                 if (input == null) {
  86                                         input = new Type [3];
  87                                         input[0] = typeof (System.IO.Stream);
  88                                         input[1] = typeof (System.Xml.XmlDocument);
  89                                         input[2] = typeof (System.Xml.XmlNodeList);
  90                                 }
  91                                 return input;
  92                         }
  93                 }
  94
  95                 public override Type[] OutputTypes {
  96                         get {
  97                                 if (output == null) {
  98                                         output = new Type [1];
  99                                         output[0] = typeof (System.IO.Stream);
 100                                 }
 101                                 return output;
 102                         }
 103                 }
 104
 105                 protected override XmlNodeList GetInnerXml ()
 106                 {
 107                         return null; // THIS IS DOCUMENTED AS SUCH
 108                 }
 109
 110 #if NET_2_0
 111                 public override byte[] GetDigestedOutput (HashAlgorithm hash)
 112                 {
 113                         // no null check, MS throws a NullReferenceException here
 114                         return hash.ComputeHash ((Stream) GetOutput ());
 115                 }
 116 #endif
 117
 118                 public override object GetOutput ()
 119                 {
 120                         return (object) s;
 121                 }
 122
 123                 public override object GetOutput (Type type)
 124                 {
 125                         if (type == typeof (Stream))
 126                                 return GetOutput ();
 127                         throw new ArgumentException ("type");
 128                 }
 129
 130                 public override void LoadInnerXml (XmlNodeList nodeList)
 131                 {
 132                         // documented as not changing the state of the transform
 133                 }
 134
 135                 public override void LoadInput (object obj)
 136                 {
 137                         canonicalizer.InclusiveNamespacesPrefixList = InclusiveNamespacesPrefixList;
 138                         // possible input: Stream, XmlDocument, and XmlNodeList
 139                         Stream stream = (obj as Stream);
 140                         if (stream != null) {
 141                                 XmlDocument doc = new XmlDocument ();
 142                                 doc.PreserveWhitespace = true;  // REALLY IMPORTANT
 143 #if NET_1_1
 144                                 doc.XmlResolver = GetResolver ();
 145 #endif
 146                                 doc.Load (new XmlSignatureStreamReader (new StreamReader (stream)));
 147 //                              doc.Load ((Stream) obj);
 148                                 s = canonicalizer.Canonicalize (doc);
 149                                 return;
 150                         }
 151
 152                         XmlDocument xd = (obj as XmlDocument);
 153                         if (xd != null) {
 154                                 s = canonicalizer.Canonicalize (xd);
 155                                 return;
 156                         }
 157
 158                         XmlNodeList nl = (obj as XmlNodeList);
 159                         if (nl != null) {
 160                                 s = canonicalizer.Canonicalize (nl);
 161                         }
 162 #if NET_2_0
 163                         else
 164                                 throw new ArgumentException ("obj");
 165 #else
 166                         // note: there is no default are other types won't throw an exception
 167 #endif
 168                 }
 169         }
 170 }
 171
 172 #endif