mcs/class/System.Security/Test/System.Security.Cryptography.Xml/XmlDsigC14NTransformTest.cs

   1 //
   2 // XmlDsigC14NTransformTest.cs - NUnit Test Cases for XmlDsigC14NTransform
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //      Aleksey Sanin (aleksey@aleksey.com)
   7 //
   8 // (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
   9 // (C) 2003 Aleksey Sanin (aleksey@aleksey.com)
  10 // (C) 2004 Novell (http://www.novell.com)
  11 //
  12
  13 using System;
  14 using System.IO;
  15 using System.Security.Cryptography.Xml;
  16 using System.Text;
  17 using System.Xml;
  18
  19 using NUnit.Framework;
  20
  21 namespace MonoTests.System.Security.Cryptography.Xml {
  22
  23         // Note: GetInnerXml is protected in XmlDsigC14NTransform making it
  24         // difficult to test properly. This class "open it up" :-)
  25         public class UnprotectedXmlDsigC14NTransform : XmlDsigC14NTransform {
  26
  27                 public XmlNodeList UnprotectedGetInnerXml () {
  28                         return base.GetInnerXml ();
  29                 }
  30         }
  31
  32         [TestFixture]
  33         public class XmlDsigC14NTransformTest : Assertion {
  34
  35                 protected UnprotectedXmlDsigC14NTransform transform;
  36
  37                 [SetUp]
  38                 protected void SetUp ()
  39                 {
  40                         transform = new UnprotectedXmlDsigC14NTransform ();
  41                 }
  42
  43                 [TearDown]
  44                 protected void CleanUp ()
  45                 {
  46                         try {
  47                                 if (File.Exists ("doc.dtd"))
  48                                         File.Delete ("doc.dtd");
  49                                 if (File.Exists ("world.txt"))
  50                                         File.Delete ("world.txt");
  51                         }
  52                         catch {}
  53                 }
  54
  55                 [Test]
  56                 public void Properties ()
  57                 {
  58                         AssertEquals ("Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315", transform.Algorithm);
  59
  60                         Type[] input = transform.InputTypes;
  61                         Assert ("Input #", (input.Length == 3));
  62                         // check presence of every supported input types
  63                         bool istream = false;
  64                         bool ixmldoc = false;
  65                         bool ixmlnl = false;
  66                         foreach (Type t in input) {
  67                                 if (t.ToString () == "System.IO.Stream")
  68                                         istream = true;
  69                                 if (t.ToString () == "System.Xml.XmlDocument")
  70                                         ixmldoc = true;
  71                                 if (t.ToString () == "System.Xml.XmlNodeList")
  72                                         ixmlnl = true;
  73                         }
  74                         Assert ("Input Stream", istream);
  75                         Assert ("Input XmlDocument", ixmldoc);
  76                         Assert ("Input XmlNodeList", ixmlnl);
  77
  78                         Type[] output = transform.OutputTypes;
  79                         Assert ("Output #", (output.Length == 1));
  80                         // check presence of every supported output types
  81                         bool ostream = false;
  82                         foreach (Type t in output) {
  83                                 if (t.ToString () == "System.IO.Stream")
  84                                         ostream = true;
  85                         }
  86                         Assert ("Output Stream", ostream);
  87                 }
  88
  89                 [Test]
  90                 public void GetInnerXml ()
  91                 {
  92                         XmlNodeList xnl = transform.UnprotectedGetInnerXml ();
  93                         AssertNull ("Default InnerXml", xnl);
  94                 }
  95
  96                 private string Stream2String (Stream s)
  97                 {
  98                         StringBuilder sb = new StringBuilder ();
  99                         int b = s.ReadByte ();
 100                         while (b != -1) {
 101                                 sb.Append (Convert.ToChar (b));
 102                                 b = s.ReadByte ();
 103                         }
 104                         return sb.ToString ();
 105                 }
 106
 107                 static string xml = "<Test  attrib='at ' xmlns=\"http://www.go-mono.com/\" > \r\n &#xD; <Toto/> text &amp; </Test   >";
 108                 // BAD for XmlDocument input (framework 1.0 result)
 109                 static string c14xml1 = "<Test xmlns=\"http://www.go-mono.com/\" attrib=\"at \"> \r\n \r <Toto></Toto> text &amp; </Test>";
 110                 // GOOD for Stream input
 111                 static string c14xml2 = "<Test xmlns=\"http://www.go-mono.com/\" attrib=\"at \"> \n &#xD; <Toto></Toto> text &amp; </Test>";
 112                 // GOOD for XmlDocument input. The difference is because once
 113                 // xml string is loaded to XmlDocument, there is no difference
 114                 // between \r and &#xD;, so every \r must be handled as &#xD;.
 115                 static string c14xml3 = "<Test xmlns=\"http://www.go-mono.com/\" attrib=\"at \"> &#xD;\n &#xD; <Toto></Toto> text &amp; </Test>";
 116
 117                 private XmlDocument GetDoc ()
 118                 {
 119                         XmlDocument doc = new XmlDocument ();
 120                         doc.PreserveWhitespace = true;
 121                         doc.LoadXml (xml);
 122                         return doc;
 123                 }
 124
 125                 [Test]
 126                 public void LoadInputAsXmlDocument ()
 127                 {
 128                         XmlDocument doc = GetDoc ();
 129                         transform.LoadInput (doc);
 130                         Stream s = (Stream) transform.GetOutput ();
 131                         string output = Stream2String (s);
 132 #if NET_1_1
 133                         AssertEquals("XmlDocument", c14xml3, output);
 134 #else
 135                         // .NET 1.0 keeps the \r\n (0x0D, 0x0A) - bug
 136                         AssertEquals("XmlDocument", c14xml1, output);
 137 #endif
 138                 }
 139
 140                 [Test]
 141 #if NET_2_0
 142                 [Category ("NotDotNet")]\r
 143                 // see LoadInputAsXmlNodeList2 description
 144 #endif
 145                 public void LoadInputAsXmlNodeList ()
 146                 {
 147                         XmlDocument doc = GetDoc ();
 148                         // Argument list just contains element Test.
 149                         transform.LoadInput (doc.ChildNodes);
 150                         Stream s = (Stream) transform.GetOutput ();
 151                         string output = Stream2String (s);
 152                         AssertEquals ("XmlChildNodes", "<Test></Test>", output);
 153                 }
 154
 155                 [Test]
 156                 [Category ("NotDotNet")]
 157                 // MS has a bug that those namespace declaration nodes in
 158                 // the node-set are written to output. Related spec section is:
 159                 // http://www.w3.org/TR/2001/REC-xml-c14n-20010315#ProcessingModel
 160                 public void LoadInputAsXmlNodeList2 ()
 161                 {
 162                         XmlDocument doc = GetDoc ();
 163                         transform.LoadInput (doc.SelectNodes ("//*"));
 164                         Stream s = (Stream) transform.GetOutput ();
 165                         string output = Stream2String (s);
 166                         string expected = @"<Test><Toto></Toto></Test>";
 167                         AssertEquals ("XmlChildNodes", expected, output);
 168                 }
 169
 170                 [Test]
 171                 public void LoadInputAsStream ()
 172                 {
 173                         MemoryStream ms = new MemoryStream ();
 174                         byte[] x = Encoding.ASCII.GetBytes (xml);
 175                         ms.Write (x, 0, x.Length);
 176                         ms.Position = 0;
 177                         transform.LoadInput (ms);
 178                         Stream s = (Stream) transform.GetOutput ();
 179                         string output = Stream2String (s);
 180                         AssertEquals ("MemoryStream", c14xml2, output);
 181                 }
 182
 183                 [Test]
 184 #if NET_2_0
 185                 [ExpectedException (typeof (ArgumentException))]
 186 #else
 187                 // LAMESPEC: input MUST be one of InputType - but no exception is thrown (not documented)
 188 #endif
 189                 public void LoadInputWithUnsupportedType ()
 190                 {
 191                         byte[] bad = { 0xBA, 0xD };
 192                         transform.LoadInput (bad);
 193                 }
 194
 195                 [Test]
 196                 [ExpectedException (typeof (ArgumentException))]
 197                 public void UnsupportedOutput ()
 198                 {
 199                         XmlDocument doc = new XmlDocument();
 200                         object o = transform.GetOutput (doc.GetType ());
 201                 }
 202
 203                 [Test]
 204                 public void C14NSpecExample1 ()
 205                 {
 206                         using (StreamWriter sw = new StreamWriter ("doc.dtd", false, Encoding.ASCII)) {
 207                                 sw.Write ("<!-- presence, not content, required -->");
 208                                 sw.Close ();
 209                         }
 210                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample1Input);
 211                         AssertEquals ("Example 1 from c14n spec - PIs, Comments, and Outside of Document Element (without comments)",
 212                                         C14NSpecExample1Output, res);
 213                 }
 214
 215                 [Test]
 216                 public void C14NSpecExample2 ()
 217                 {
 218                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample2Input);
 219                         AssertEquals ("Example 2 from c14n spec - Whitespace in Document Content (without comments)",
 220                                         C14NSpecExample2Output, res);
 221                 }
 222
 223                 [Test]
 224                 public void C14NSpecExample3 ()
 225                 {
 226                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample3Input);
 227                         AssertEquals ("Example 3 from c14n spec - Start and End Tags (without comments)",
 228                                         C14NSpecExample3Output, res);
 229                 }
 230
 231                 [Test]
 232 //              [Ignore ("This test should be fine, but it does not pass under MS.NET")]
 233                 public void C14NSpecExample4 ()
 234                 {
 235                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample4Input);
 236                         AssertEquals ("Example 4 from c14n spec - Character Modifications and Character References (without comments)",
 237                                         C14NSpecExample4Output, res);
 238                 }
 239
 240                 [Test]
 241                 public void C14NSpecExample5 ()
 242                 {
 243                         using (StreamWriter sw = new StreamWriter ("world.txt", false, Encoding.ASCII)) {
 244                                 sw.Write ("world");
 245                                 sw.Close ();
 246                         }
 247                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample5Input);
 248                         AssertEquals ("Example 5 from c14n spec - Entity References (without comments)",
 249                                         C14NSpecExample5Output, res);
 250                 }
 251
 252                 [Test]
 253                 public void C14NSpecExample6 ()
 254                 {
 255                         string res = ExecuteXmlDSigC14NTransform (C14NSpecExample6Input);
 256                         AssertEquals ("Example 6 from c14n spec - UTF-8 Encoding (without comments)",
 257                                         C14NSpecExample6Output, res);
 258                 }
 259
 260                 private string ExecuteXmlDSigC14NTransform (string InputXml)
 261                 {
 262                         XmlDocument doc = new XmlDocument ();
 263                         doc.PreserveWhitespace = true;
 264                         doc.LoadXml (InputXml);
 265
 266                         // Testing default attribute support with
 267                         // vreader.ValidationType = ValidationType.None.
 268                         //
 269                         UTF8Encoding utf8 = new UTF8Encoding ();
 270                         byte[] data = utf8.GetBytes (InputXml.ToString ());
 271                         Stream stream = new MemoryStream (data);
 272                         XmlTextReader reader = new XmlTextReader (stream);
 273                         XmlValidatingReader vreader = new XmlValidatingReader (reader);
 274                         vreader.ValidationType = ValidationType.None;
 275                         vreader.EntityHandling = EntityHandling.ExpandCharEntities;
 276                         doc.Load (vreader);
 277
 278                         transform.LoadInput (doc);
 279                         return Stream2String ((Stream)transform.GetOutput ());
 280                 }
 281
 282                 //
 283                 // Example 1 from C14N spec - PIs, Comments, and Outside of Document Element:
 284                 // http://www.w3.org/TR/xml-c14n#Example-OutsideDoc
 285                 //
 286                 // Aleksey:
 287                 // removed reference to an empty external DTD
 288                 //
 289                 static string C14NSpecExample1Input =
 290                         "<?xml version=\"1.0\"?>\n" +
 291                         "\n" +
 292                         "<?xml-stylesheet   href=\"doc.xsl\"\n" +
 293                         "   type=\"text/xsl\"   ?>\n" +
 294                         "\n" +
 295                         // "<!DOCTYPE doc SYSTEM \"doc.dtd\">\n" +
 296                         "\n" +
 297                         "<doc>Hello, world!<!-- Comment 1 --></doc>\n" +
 298                         "\n" +
 299                         "<?pi-without-data     ?>\n\n" +
 300                         "<!-- Comment 2 -->\n\n" +
 301                         "<!-- Comment 3 -->\n";
 302                 static string C14NSpecExample1Output =
 303                         "<?xml-stylesheet href=\"doc.xsl\"\n" +
 304                         "   type=\"text/xsl\"   ?>\n" +
 305                         "<doc>Hello, world!</doc>\n" +
 306                         "<?pi-without-data?>";
 307
 308                 //
 309                 // Example 2 from C14N spec - Whitespace in Document Content:
 310                 // http://www.w3.org/TR/xml-c14n#Example-WhitespaceInContent
 311                 //
 312                 static string C14NSpecExample2Input =
 313                         "<doc>\n" +
 314                         "  <clean>   </clean>\n" +
 315                         "   <dirty>   A   B   </dirty>\n" +
 316                         "   <mixed>\n" +
 317                         "      A\n" +
 318                         "      <clean>   </clean>\n" +
 319                         "      B\n" +
 320                         "      <dirty>   A   B   </dirty>\n" +
 321                         "      C\n" +
 322                         "   </mixed>\n" +
 323                         "</doc>\n";
 324                 static string C14NSpecExample2Output =
 325                         "<doc>\n" +
 326                         "  <clean>   </clean>\n" +
 327                         "   <dirty>   A   B   </dirty>\n" +
 328                         "   <mixed>\n" +
 329                         "      A\n" +
 330                         "      <clean>   </clean>\n" +
 331                         "      B\n" +
 332                         "      <dirty>   A   B   </dirty>\n" +
 333                         "      C\n" +
 334                         "   </mixed>\n" +
 335                         "</doc>";
 336
 337                 //
 338                 // Example 3 from C14N spec - Start and End Tags:
 339                 // http://www.w3.org/TR/xml-c14n#Example-SETags
 340                 //
 341                 static string C14NSpecExample3Input =
 342                         "<!DOCTYPE doc [<!ATTLIST e9 attr CDATA \"default\">]>\n" +
 343                         "<doc>\n" +
 344                         "   <e1   />\n" +
 345                         "   <e2   ></e2>\n" +
 346                         "   <e3    name = \"elem3\"   id=\"elem3\"    />\n" +
 347                         "   <e4    name=\"elem4\"   id=\"elem4\"    ></e4>\n" +
 348                         "   <e5 a:attr=\"out\" b:attr=\"sorted\" attr2=\"all\" attr=\"I\'m\"\n" +
 349                         "       xmlns:b=\"http://www.ietf.org\" \n" +
 350                         "       xmlns:a=\"http://www.w3.org\"\n" +
 351                         "       xmlns=\"http://www.uvic.ca\"/>\n" +
 352                         "   <e6 xmlns=\"\" xmlns:a=\"http://www.w3.org\">\n" +
 353                         "       <e7 xmlns=\"http://www.ietf.org\">\n" +
 354                         "           <e8 xmlns=\"\" xmlns:a=\"http://www.w3.org\">\n" +
 355                         "               <e9 xmlns=\"\" xmlns:a=\"http://www.ietf.org\"/>\n" +
 356                         "           </e8>\n" +
 357                         "       </e7>\n" +
 358                         "   </e6>\n" +
 359                         "</doc>\n";
 360                 static string C14NSpecExample3Output =
 361                         "<doc>\n" +
 362                         "   <e1></e1>\n" +
 363                         "   <e2></e2>\n" +
 364                         "   <e3 id=\"elem3\" name=\"elem3\"></e3>\n" +
 365                         "   <e4 id=\"elem4\" name=\"elem4\"></e4>\n" +
 366                         "   <e5 xmlns=\"http://www.uvic.ca\" xmlns:a=\"http://www.w3.org\" xmlns:b=\"http://www.ietf.org\" attr=\"I\'m\" attr2=\"all\" b:attr=\"sorted\" a:attr=\"out\"></e5>\n" +
 367                         "   <e6 xmlns:a=\"http://www.w3.org\">\n" +
 368                         "       <e7 xmlns=\"http://www.ietf.org\">\n" +
 369                         "           <e8 xmlns=\"\">\n" +
 370                         "               <e9 xmlns:a=\"http://www.ietf.org\" attr=\"default\"></e9>\n" +
 371 //                      "               <e9 xmlns:a=\"http://www.ietf.org\"></e9>\n" +
 372                         "           </e8>\n" +
 373                         "       </e7>\n" +
 374                         "   </e6>\n" +
 375                         "</doc>";
 376
 377
 378                 //
 379                 // Example 4 from C14N spec - Character Modifications and Character References:
 380                 // http://www.w3.org/TR/xml-c14n#Example-Chars
 381                 //
 382                 // Aleksey:
 383                 // This test does not include "normId" element
 384                 // because it has an invalid ID attribute "id" which
 385                 // should be normalized by XML parser. Currently Mono
 386                 // does not support this (see comment after this example
 387                 // in the spec).
 388                 static string C14NSpecExample4Input =
 389                         "<!DOCTYPE doc [<!ATTLIST normId id ID #IMPLIED>]>\n" +
 390                         "<doc>\n" +
 391                         "   <text>First line&#x0d;&#10;Second line</text>\n" +
 392                         "   <value>&#x32;</value>\n" +
 393                         "   <compute><![CDATA[value>\"0\" && value<\"10\" ?\"valid\":\"error\"]]></compute>\n" +
 394                         "   <compute expr=\'value>\"0\" &amp;&amp; value&lt;\"10\" ?\"valid\":\"error\"\'>valid</compute>\n" +
 395                         "   <norm attr=\' &apos;   &#x20;&#13;&#xa;&#9;   &apos; \'/>\n" +
 396                         // "   <normId id=\' &apos;   &#x20;&#13;&#xa;&#9;   &apos; \'/>\n" +
 397                         "</doc>\n";
 398                 static string C14NSpecExample4Output =
 399                         "<doc>\n" +
 400                         "   <text>First line&#xD;\n" +
 401                         "Second line</text>\n" +
 402                         "   <value>2</value>\n" +
 403                         "   <compute>value&gt;\"0\" &amp;&amp; value&lt;\"10\" ?\"valid\":\"error\"</compute>\n" +
 404                         "   <compute expr=\"value>&quot;0&quot; &amp;&amp; value&lt;&quot;10&quot; ?&quot;valid&quot;:&quot;error&quot;\">valid</compute>\n" +
 405                         "   <norm attr=\" \'    &#xD;&#xA;&#x9;   \' \"></norm>\n" +
 406                         // "   <normId id=\"\' &#xD;&#xA;&#x9; \'\"></normId>\n" +
 407                         "</doc>";
 408
 409                 //
 410                 // Example 5 from C14N spec - Entity References:
 411                 // http://www.w3.org/TR/xml-c14n#Example-Entities
 412                 //
 413                 static string C14NSpecExample5Input =
 414                         "<!DOCTYPE doc [\n" +
 415                         "<!ATTLIST doc attrExtEnt ENTITY #IMPLIED>\n" +
 416                         "<!ENTITY ent1 \"Hello\">\n" +
 417                         "<!ENTITY ent2 SYSTEM \"world.txt\">\n" +
 418                         "<!ENTITY entExt SYSTEM \"earth.gif\" NDATA gif>\n" +
 419                         "<!NOTATION gif SYSTEM \"viewgif.exe\">\n" +
 420                         "]>\n" +
 421                         "<doc attrExtEnt=\"entExt\">\n" +
 422                         "   &ent1;, &ent2;!\n" +
 423                         "</doc>\n" +
 424                         "\n" +
 425                         "<!-- Let world.txt contain \"world\" (excluding the quotes) -->\n";
 426                 static string C14NSpecExample5Output =
 427                         "<doc attrExtEnt=\"entExt\">\n" +
 428                         "   Hello, world!\n" +
 429                         "</doc>";
 430
 431                 //
 432                 // Example 6 from C14N spec - UTF-8 Encoding:
 433                 // http://www.w3.org/TR/xml-c14n#Example-UTF8
 434                 //
 435                 static string C14NSpecExample6Input =
 436                         "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n" +
 437                         "<doc>&#169;</doc>\n";
 438                 static string C14NSpecExample6Output =
 439                         "<doc>\xC2\xA9</doc>";
 440
 441
 442                 //
 443                 // Example 7 from C14N spec - Document Subsets:
 444                 // http://www.w3.org/TR/xml-c14n#Example-DocSubsets
 445                 //
 446                 // Aleksey:
 447                 // Well, XPath support in Mono is far from complete....
 448                 // I was not able to simplify the xpath expression from this test
 449                 // so it runs on Mono and still makes sense for testing this feature.
 450                 // Thus this test is not included in the suite now.
 451                 static string C14NSpecExample7Input =
 452                         "<!DOCTYPE doc [\n" +
 453                         "<!ATTLIST e2 xml:space (default|preserve) \'preserve\'>\n" +
 454                         "<!ATTLIST e3 id ID #IMPLIED>\n" +
 455                         "]>\n" +
 456                         "<doc xmlns=\"http://www.ietf.org\" xmlns:w3c=\"http://www.w3.org\">\n" +
 457                         "   <e1>\n" +
 458                         "      <e2 xmlns=\"\">\n" +
 459                         "         <e3 id=\"E3\"/>\n" +
 460                         "      </e2>\n" +
 461                         "   </e1>\n" +
 462                         "</doc>\n";
 463
 464                 static string C14NSpecExample7Xpath =
 465                         "(//.|//@*|//namespace::*)\n" +
 466                         "[\n" +
 467                         "self::ietf:e1\n" +
 468                         "    or\n" +
 469                         "(parent::ietf:e1 and not(self::text() or self::e2))\n" +
 470                         "    or\n" +
 471                         "count(id(\"E3\")|ancestor-or-self::node()) = count(ancestor-or-self::node())\n" +
 472                         "]";
 473                 static string C14NSpecExample7Output =
 474                         "<e1 xmlns=\"http://www.ietf.org\" xmlns:w3c=\"http://www.w3.org\"><e3 xmlns=\"\" id=\"E3\" xml:space=\"preserve\"></e3></e1>";
 475
 476                 [Test]
 477                 public void SimpleNamespacePrefixes ()
 478                 {
 479                         string input = "<a:Action xmlns:a='urn:foo'>http://tempuri.org/IFoo/Echo</a:Action>";
 480                         string expected = @"<a:Action xmlns:a=""urn:foo"">http://tempuri.org/IFoo/Echo</a:Action>";
 481
 482                         XmlDocument doc = new XmlDocument ();
 483                         doc.LoadXml (input);
 484                         XmlDsigC14NTransform t = new XmlDsigC14NTransform ();
 485                         t.LoadInput (doc);
 486                         Stream s = t.GetOutput () as Stream;
 487                         AssertEquals (expected, new StreamReader (s, Encoding.UTF8).ReadToEnd ());
 488                 }
 489
 490 #if NET_2_0
 491                 [Test]
 492                 public void PrefixlessNamespaceOutput ()
 493                 {
 494                         XmlDocument doc = new XmlDocument ();
 495                         doc.AppendChild (doc.CreateElement ("foo", "urn:foo"));
 496                         doc.DocumentElement.AppendChild (doc.CreateElement ("bar", "urn:bar"));
 497                         AssertEquals ("#1", String.Empty, doc.DocumentElement.GetAttribute ("xmlns"));
 498                         XmlDsigC14NTransform t = new XmlDsigC14NTransform ();
 499                         t.LoadInput (doc);
 500                         Stream s = t.GetOutput () as Stream;
 501                         AssertEquals ("<foo xmlns=\"urn:foo\"><bar xmlns=\"urn:bar\"></bar></foo>", new StreamReader (s, Encoding.UTF8).ReadToEnd ());
 502                         AssertEquals ("#2", "urn:foo", doc.DocumentElement.GetAttribute ("xmlns"));
 503                 }
 504
 505                 [Test]
 506                 [Ignore ("find out how PropagatedNamespaces returns non-null instance on .NET")]
 507                 public void PropagatedNamespaces ()
 508                 {
 509                         XmlDocument doc = new XmlDocument ();
 510                         doc.AppendChild (doc.CreateElement ("foo", "urn:foo"));
 511                         doc.DocumentElement.AppendChild (doc.CreateElement ("bar", "urn:bar"));
 512                         AssertEquals ("#1", String.Empty, doc.DocumentElement.GetAttribute ("xmlns:f"));
 513                         XmlDsigExcC14NTransform t = new XmlDsigExcC14NTransform ();
 514                         t.LoadInput (doc);
 515                         t.PropagatedNamespaces.Add ("f", "urn:foo");
 516                         t.PropagatedNamespaces.Add ("b", "urn:bar");
 517                         Stream s = t.GetOutput () as Stream;
 518                         AssertEquals ("<f:foo xmlns:f=\"urn:foo\"><b:bar xmlns:b=\"urn:bar\"></b:bar></f:foo>", new StreamReader (s, Encoding.UTF8).ReadToEnd ());
 519                         AssertEquals ("#2", "urn:foo", doc.DocumentElement.GetAttribute ("xmlns:f"));
 520                 }
 521 #endif
 522         }
 523 }