XmlDsigExcC14NTransform.cs :  » 2.6.4-mono-.net-core » System.Security » System » Security » Cryptography » Xml » C# / CSharp Open Source

//
// XmlDsigExcC14NTransform.cs - ExcC14N 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.
//
#if NET_2_0

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 XmlDsigExcC14NTransform : Transform {
    private Type[] input;
    private Type[] output;
    private XmlCanonicalizer canonicalizer;
    private Stream s;
    private string inclusiveNamespacesPrefixList;
    
    public XmlDsigExcC14NTransform ()  
      : this (false, null)
    {
    }

    public XmlDsigExcC14NTransform (bool includeComments) 
      : this (includeComments, null)
    {
    }

    public XmlDsigExcC14NTransform (string inclusiveNamespacesPrefixList)
      : this (false, inclusiveNamespacesPrefixList)
    {
    }

    public XmlDsigExcC14NTransform (bool includeComments, string inclusiveNamespacesPrefixList)
    {
      if (includeComments)
        Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NWithCommentsTransform;
      else
        Algorithm = XmlSignature.AlgorithmNamespaces.XmlDsigExcC14NTransform;
      this.inclusiveNamespacesPrefixList = inclusiveNamespacesPrefixList;
      canonicalizer = new XmlCanonicalizer (includeComments, true, PropagatedNamespaces);
    }

    public string InclusiveNamespacesPrefixList {
      get { return inclusiveNamespacesPrefixList; }
      set { inclusiveNamespacesPrefixList = value; }
    }

    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
    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) 
    {
      canonicalizer.InclusiveNamespacesPrefixList = InclusiveNamespacesPrefixList;
      // possible input: Stream, XmlDocument, and XmlNodeList
      Stream stream = (obj as Stream);
      if (stream != null) {
        XmlDocument doc = new XmlDocument ();
        doc.PreserveWhitespace = true;  // REALLY IMPORTANT
#if NET_1_1
        doc.XmlResolver = GetResolver ();
#endif
        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
    }
  }
}

#endif