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//
// XmlDsigC14NTransform.cs - C14N Transform implementation for XML Signature
// http://www.w3.org/TR/xml-c14n
//
// Authors:
// Sebastien Pouliot <sebastien@ximian.com>
// Aleksey Sanin (aleksey@aleksey.com)
// Tim Coleman (tim@timcoleman.com)
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
// (C) 2003 Aleksey Sanin (aleksey@aleksey.com)
// Copyright (C) Tim Coleman, 2004
// Copyright (C) 2004-2005 Novell Inc. (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.Runtime.InteropServices;
using System.Text;
using System.Xml;
using Mono.Xml;
namespace System.Security.Cryptography.Xml {
public class XmlDsigC14NTransform : Transform {
private Type[] input;
private Type[] output;
private XmlCanonicalizer canonicalizer;
private Stream s;
public XmlDsigC14NTransform () : this (false)
{
}
public XmlDsigC14NTransform (bool includeComments)
{
if (includeComments)
Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigC14NWithCommentsTransform;
else
Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigC14NTransform;
canonicalizer = new XmlCanonicalizer (includeComments, false, PropagatedNamespaces);
}
public override Type[] InputTypes {
get {
if (input == null) {
input = new Type [3];
input[0] = typeof (System.IO.Stream);
input[1] = typeof (System.Xml.XmlDocument);
input[2] = typeof (System.Xml.XmlNodeList);
}
return input;
}
}
public override Type[] OutputTypes {
get {
if (output == null) {
output = new Type [1];
output[0] = typeof (System.IO.Stream);
}
return output;
}
}
protected override XmlNodeList GetInnerXml ()
{
return null; // THIS IS DOCUMENTED AS SUCH
}
#if NET_2_0
[ComVisible (false)]
public override byte[] GetDigestedOutput (HashAlgorithm hash)
{
// no null check, MS throws a NullReferenceException here
return hash.ComputeHash ((Stream) GetOutput ());
}
#endif
public override object GetOutput ()
{
return (object) s;
}
public override object GetOutput (Type type)
{
if (type == typeof (Stream))
return GetOutput ();
throw new ArgumentException ("type");
}
public override void LoadInnerXml (XmlNodeList nodeList)
{
// documented as not changing the state of the transform
}
public override void LoadInput (object obj)
{
// possible input: Stream, XmlDocument, and XmlNodeList
Stream stream = (obj as Stream);
if (stream != null) {
XmlDocument doc = new XmlDocument ();
doc.PreserveWhitespace = true; // REALLY IMPORTANT
doc.XmlResolver = GetResolver ();
doc.Load (new XmlSignatureStreamReader (new StreamReader (stream)));
// doc.Load ((Stream) obj);
s = canonicalizer.Canonicalize (doc);
return;
}
XmlDocument xd = (obj as XmlDocument);
if (xd != null) {
s = canonicalizer.Canonicalize (xd);
return;
}
XmlNodeList nl = (obj as XmlNodeList);
if (nl != null) {
s = canonicalizer.Canonicalize (nl);
}
#if NET_2_0
else
throw new ArgumentException ("obj");
#else
// note: there is no default are other types won't throw an exception
#endif
}
}
}
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