// http://www.w3.org/TR/1999/REC-xpath-19991116
//
// Author:
-// Sebastien Pouliot (spouliot@motus.com)
+// Sebastien Pouliot <sebastien@ximian.com>
+// Atsushi Enomoto <atsushi@ximian.com>
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
+// (C) 2004 Novell (http://www.novell.com)
//
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System.Collections;
using System.IO;
using System.Text;
using System.Xml;
+using System.Xml.XPath;
+using System.Xml.Xsl;
-namespace System.Security.Cryptography.Xml {
+namespace System.Security.Cryptography.Xml
+{
// www.w3.org/TR/xmldsig-core/
// see Section 6.6.3 of the XMLDSIG specification
- [MonoTODO]
- public class XmlDsigXPathTransform : Transform {
+ public class XmlDsigXPathTransform : Transform
+ {
- private Type[] input;
- private Type[] output;
- private XmlNodeList xnl;
- private XmlNodeList xpathNodes;
+ private Type [] input;
+ private Type [] output;
+ private XmlNodeList xpath;
+ private XmlDocument doc;
+ private XsltContext ctx;
public XmlDsigXPathTransform ()
{
+ Algorithm = "http://www.w3.org/TR/1999/REC-xpath-19991116";
}
- public override Type[] InputTypes {
+ public override Type [] InputTypes {
get {
if (input == null) {
lock (this) {
// this way the result is cached if called multiple time
input = new Type [3];
- input[0] = typeof (System.IO.Stream);
- input[1] = typeof (System.Xml.XmlDocument);
- input[2] = typeof (System.Xml.XmlNodeList);
+ input [0] = typeof (System.IO.Stream);
+ input [1] = typeof (System.Xml.XmlDocument);
+ input [2] = typeof (System.Xml.XmlNodeList);
}
}
return input;
lock (this) {
// this way the result is cached if called multiple time
output = new Type [1];
- output[0] = typeof (System.IO.Stream);
+ output [0] = typeof (System.Xml.XmlNodeList);
}
}
return output;
protected override XmlNodeList GetInnerXml ()
{
- return xnl;
+ if (xpath == null) {
+ // default value
+ XmlDocument xpdoc = new XmlDocument ();
+ xpdoc.LoadXml ("<XPath xmlns=\"" + XmlSignature.NamespaceURI + "\"></XPath>");
+ xpath = xpdoc.ChildNodes;
+ }
+ return xpath;
}
+ [MonoTODO ("Evaluation of extension function here() results in different from MS.NET (is MS.NET really correct??).")]
public override object GetOutput ()
{
- return xpathNodes;
+ if (xpath == null)
+ return new XmlDsigNodeList (new ArrayList ());
+
+ // evaluate every time since input or xpath might have changed.
+ string x = null;
+ for (int i = 0; i < xpath.Count; i++) {
+ switch (xpath [i].NodeType) {
+ case XmlNodeType.Text:
+ case XmlNodeType.CDATA:
+ case XmlNodeType.Element:
+ x += xpath [i].InnerText;
+ break;
+ }
+ }
+
+ ctx = new XmlDsigXPathContext (doc);
+ foreach (XmlNode n in xpath) {
+ XPathNavigator nav = n.CreateNavigator ();
+ XPathNodeIterator iter = nav.Select ("namespace::*");
+ while (iter.MoveNext ())
+ if (iter.Current.LocalName != "xml")
+ ctx.AddNamespace (iter.Current.LocalName, iter.Current.Value);
+ }
+ return EvaluateMatch (doc, x);
}
public override object GetOutput (Type type)
return GetOutput ();
}
+ private XmlDsigNodeList EvaluateMatch (XmlNode n, string xpath)
+ {
+ ArrayList al = new ArrayList ();
+ // Strictly to say, document node is explicitly
+ // excluded by W3C spec (context node is initialized
+ // to the document root and XPath expression is
+ // "//. | //@* | //namespace::*)
+ XPathNavigator nav = n.CreateNavigator ();
+ XPathExpression exp = nav.Compile (xpath);
+ exp.SetContext (ctx);
+ EvaluateMatch (n, exp, al);
+ return new XmlDsigNodeList (al);
+ }
+
+ private void EvaluateMatch (XmlNode n, XPathExpression exp, ArrayList al)
+ {
+ if (NodeMatches (n, exp))
+ al.Add (n);
+ if (n.Attributes != null)
+ for (int i = 0; i < n.Attributes.Count; i++)
+ if (NodeMatches (n.Attributes [i], exp))
+ al.Add (n.Attributes [i]);
+ for (int i = 0; i < n.ChildNodes.Count; i++)
+ EvaluateMatch (n.ChildNodes [i], exp, al);
+ }
+
+ private bool NodeMatches (XmlNode n, XPathExpression exp)
+ {
+ // This looks waste of memory since it creates
+ // XPathNavigator every time, but even if we use
+ // XPathNodeIterator.Current, it also clones every time.
+ object ret = n.CreateNavigator ().Evaluate (exp);
+ if (ret is bool)
+ return (bool) ret;
+ if (ret is double) {
+ double d = (double) ret;
+ return !(d == 0.0 || d == double.NaN);
+ }
+ if (ret is string)
+ return ((string) ret).Length > 0;
+ if (ret is XPathNodeIterator) {
+ XPathNodeIterator retiter = (XPathNodeIterator) ret;
+ return retiter.Count > 0;
+ }
+ return false;
+ }
+
public override void LoadInnerXml (XmlNodeList nodeList)
{
if (nodeList == null)
throw new CryptographicException ("nodeList");
- xnl = nodeList;
+ xpath = nodeList;
}
public override void LoadInput (object obj)
{
- XmlNode xn = null;
// possible input: Stream, XmlDocument, and XmlNodeList
if (obj is Stream) {
- XmlDocument doc = new XmlDocument ();
+ doc = new XmlDocument ();
+#if ! NET_1_0
+ doc.XmlResolver = GetResolver ();
+#endif
doc.Load (obj as Stream);
}
else if (obj is XmlDocument) {
+ doc = (obj as XmlDocument);
}
else if (obj is XmlNodeList) {
- xnl = (XmlNodeList) obj;
+ doc = new XmlDocument ();
+#if ! NET_1_0
+ doc.XmlResolver = GetResolver ();
+#endif
+ foreach (XmlNode xn in (obj as XmlNodeList)) {
+ XmlNode importedNode = doc.ImportNode (xn, true);
+ doc.AppendChild (importedNode);
+ }
}
+ }
+
+ // Internal classes to support XPath extension function here()
+
+ internal class XmlDsigXPathContext : XsltContext
+ {
+ XmlDsigXPathFunctionHere here;
+ public XmlDsigXPathContext (XmlNode node)
+ {
+ here = new XmlDsigXPathFunctionHere (node);
+ }
+
+ public override IXsltContextFunction ResolveFunction (
+ string prefix, string name, XPathResultType [] argType)
+ {
+ // Here MS.NET incorrectly allows arbitrary
+ // name e.g. "heretic()".
+ if (name == "here" &&
+ prefix == String.Empty &&
+ argType.Length == 0)
+ return here;
+ else
+ return null; // ????
+ }
+
+ public override bool Whitespace {
+ get { return true; }
+ }
+
+ public override bool PreserveWhitespace (XPathNavigator node)
+ {
+ return true;
+ }
+
+ public override int CompareDocument (string s1, string s2)
+ {
+ return String.Compare (s1, s2);
+ }
+
+ public override IXsltContextVariable ResolveVariable (string prefix, string name)
+ {
+ throw new InvalidOperationException ();
+ }
+ }
+
+ internal class XmlDsigXPathFunctionHere : IXsltContextFunction
+ {
+ // Static
+
+ static XPathResultType [] types;
+ static XmlDsigXPathFunctionHere ()
+ {
+ types = new XPathResultType [0];
+ }
+
+ // Instance
+
+ XPathNodeIterator xpathNode;
+
+ public XmlDsigXPathFunctionHere (XmlNode node)
+ {
+ xpathNode = node.CreateNavigator ().Select (".");
+ }
+
+ public XPathResultType [] ArgTypes {
+ get { return types; }
+ }
+
+ public int Maxargs { get { return 0; } }
+
+ public int Minargs { get { return 0; } }
+
+ public XPathResultType ReturnType {
+ get { return XPathResultType.NodeSet; }
+ }
+
+ public object Invoke (XsltContext ctx, object [] args, XPathNavigator docContext)
+ {
+ if (args.Length != 0)
+ throw new ArgumentException ("Not allowed arguments for function here().", "args");
- if (xn != null) {
- string xpath = xn.InnerXml;
- // only possible output: XmlNodeList
- xpathNodes = xnl[0].SelectNodes (xpath);
+ return xpathNode.Clone ();
}
- else
- xpathNodes = null;
}
}
}
projects / mono.git / blobdiff