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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.IdentityModel
{
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
sealed class CanonicalizationDriver
{
bool closeReadersAfterProcessing;
XmlReader reader;
string[] inclusivePrefixes;
bool includeComments;
public bool CloseReadersAfterProcessing
{
get { return this.closeReadersAfterProcessing; }
set { this.closeReadersAfterProcessing = value; }
}
public bool IncludeComments
{
get { return this.includeComments; }
set { this.includeComments = value; }
}
public string[] GetInclusivePrefixes()
{
return this.inclusivePrefixes;
}
public void Reset()
{
this.reader = null;
}
public void SetInclusivePrefixes(string[] inclusivePrefixes)
{
this.inclusivePrefixes = inclusivePrefixes;
}
public void SetInput(Stream stream)
{
if (stream == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("stream");
}
this.reader = XmlReader.Create(stream);
}
public void SetInput(XmlReader reader)
{
if (reader == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("reader");
}
this.reader = reader;
}
public byte[] GetBytes()
{
return GetMemoryStream().ToArray();
}
public MemoryStream GetMemoryStream()
{
MemoryStream stream = new MemoryStream();
WriteTo(stream);
stream.Seek(0, SeekOrigin.Begin);
return stream;
}
public void WriteTo(HashAlgorithm hashAlgorithm)
{
WriteTo(new HashStream(hashAlgorithm));
}
public void WriteTo(Stream canonicalStream)
{
if (this.reader != null)
{
XmlDictionaryReader dicReader = this.reader as XmlDictionaryReader;
if ((dicReader != null) && (dicReader.CanCanonicalize))
{
dicReader.MoveToContent();
dicReader.StartCanonicalization(canonicalStream, this.includeComments, this.inclusivePrefixes);
dicReader.Skip();
dicReader.EndCanonicalization();
}
else
{
XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(Stream.Null);
if (this.inclusivePrefixes != null)
{
// Add a dummy element at the top and populate the namespace
// declaration of all the inclusive prefixes.
writer.WriteStartElement("a", reader.LookupNamespace(String.Empty));
for (int i = 0; i < this.inclusivePrefixes.Length; ++i)
{
string ns = reader.LookupNamespace(this.inclusivePrefixes[i]);
if (ns != null)
{
writer.WriteXmlnsAttribute(this.inclusivePrefixes[i], ns);
}
}
}
writer.StartCanonicalization(canonicalStream, this.includeComments, this.inclusivePrefixes);
if (reader is WrappedReader)
{
((WrappedReader)reader).XmlTokens.GetWriter().WriteTo(writer, new DictionaryManager());
}
else
{
writer.WriteNode(reader, false);
}
writer.Flush();
writer.EndCanonicalization();
if (this.inclusivePrefixes != null)
writer.WriteEndElement();
writer.Close();
}
if (this.closeReadersAfterProcessing)
{
this.reader.Close();
}
this.reader = null;
}
else
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.NoInputIsSetForCanonicalization)));
}
}
}
}
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