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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text;
using System.Xml;
namespace System.Security.Cryptography.Xml
{
// the class that provides node subset state and canonicalization function to XmlProcessingInstruction
internal sealed class CanonicalXmlProcessingInstruction : XmlProcessingInstruction, ICanonicalizableNode
{
private bool _isInNodeSet;
public CanonicalXmlProcessingInstruction(string target, string data, XmlDocument doc, bool defaultNodeSetInclusionState)
: base(target, data, doc)
{
_isInNodeSet = defaultNodeSetInclusionState;
}
public bool IsInNodeSet
{
get { return _isInNodeSet; }
set { _isInNodeSet = value; }
}
public void Write(StringBuilder strBuilder, DocPosition docPos, AncestralNamespaceContextManager anc)
{
if (!IsInNodeSet)
return;
if (docPos == DocPosition.AfterRootElement)
strBuilder.Append((char)10);
strBuilder.Append("<?");
strBuilder.Append(Name);
if ((Value != null) && (Value.Length > 0))
strBuilder.Append(' ').Append(Value);
strBuilder.Append("?>");
if (docPos == DocPosition.BeforeRootElement)
strBuilder.Append((char)10);
}
public void WriteHash(HashAlgorithm hash, DocPosition docPos, AncestralNamespaceContextManager anc)
{
if (!IsInNodeSet)
return;
byte[] rgbData;
if (docPos == DocPosition.AfterRootElement)
{
rgbData = "(char) 10"u8.ToArray();
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
}
rgbData = "<?"u8.ToArray();
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
rgbData = Encoding.UTF8.GetBytes(Name);
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
if ((Value != null) && (Value.Length > 0))
{
rgbData = Encoding.UTF8.GetBytes(" " + Value);
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
}
rgbData = "?>"u8.ToArray();
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
if (docPos == DocPosition.BeforeRootElement)
{
rgbData = "(char) 10"u8.ToArray();
hash.TransformBlock(rgbData, 0, rgbData.Length, rgbData, 0);
}
}
}
}
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