/// <summary>
/// Applies a canonicalization transform over a set of XML nodes.
/// </summary>
/// <param name="tokenStream">the set of XML nodes to transform.</param>
/// <param name="includeComments">include comments in canonical bytes.</param>
/// <param name="inclusiveNamespacesPrefixList">list of namespace prefixes to include</param>
/// <returns>the bytes of the transformed octets.</returns>
internal static string GetString(XmlTokenStream tokenStream, bool includeComments, string[] inclusiveNamespacesPrefixList)
{
var streamWriter = new XmlTokenStreamWriter(tokenStream);
using (var stream = new MemoryStream())
using (var writer = XmlDictionaryWriter.CreateTextWriter(Stream.Null))
{
writer.StartCanonicalization(stream, includeComments, inclusiveNamespacesPrefixList);
streamWriter.WriteTo(writer);
writer.EndCanonicalization();
writer.Flush();
return(Encoding.UTF8.GetString(stream.GetBuffer(), 0, (int)stream.Length));
}
}
/// <summary>
/// Initializes a new instance of <see cref="XmlTokenStreamReader"/> for creating a <see cref="XmlTokenStream"/>.
/// </summary>
/// <param name="reader">an <see cref="XmlDictionaryReader"/> to capture the <see cref="XmlTokenStream"/>.</param>
/// <exception cref="ArgumentNullException">if <paramref name="reader"/> if null.</exception>
/// <exception cref="ArgumentException">if <paramref name="reader"/>.IsStartElement() is false.</exception>
public XmlTokenStreamReader(XmlDictionaryReader reader)
{
if (reader == null)
{
throw LogArgumentNullException(nameof(reader));
}
if (!reader.IsStartElement())
{
throw LogExceptionMessage(new ArgumentException(FormatInvariant(LogMessages.IDX30026, reader.NodeType)));
}
TokenStream = new XmlTokenStream();
InnerReader = reader;
Record();
}
/// <summary>
/// Initializes a new instance of <see cref="XmlTokenStreamReader"/> for creating a <see cref="XmlTokenStream"/>.
/// </summary>
/// <param name="reader">an <see cref="XmlDictionaryReader"/> to capture the <see cref="XmlTokenStream"/>.</param>
/// <exception cref="ArgumentNullException">if <paramref name="reader"/> if null.</exception>
/// <exception cref="ArgumentException">if <paramref name="reader"/>.IsStartElement() is false.</exception>
public XmlTokenStreamReader(XmlDictionaryReader reader)
{
if (reader == null)
{
throw LogArgumentNullException(nameof(reader));
}
if (!reader.IsStartElement())
{
throw LogExceptionMessage(new ArgumentException(FormatInvariant(LogMessages.IDX30026, reader.NodeType)));
}
// When multiple signed elements are being processed, the EnvelopedSignatureReader always creates a new XmlTokenStreamReader.
// This creates a chain of readers.
// The outer reader need to record the position of its 'Signature' element.
// When calculating the digest all inner 'Signatures' are considered as inner text.
// This allows for embedded signed elements.
_innerTokenStreamReader = reader as XmlTokenStreamReader;
TokenStream = new XmlTokenStream();
InnerReader = reader;
Record();
}
public XmlTokenStreamWriter(XmlTokenStream tokenStream)
{
Position = 0;
TokenStream = tokenStream;
}
/// <summary> /// Processes a set of XML nodes and returns the hash of the octets. /// </summary> /// <param name="tokenStream">the <see cref="XmlTokenStream"/> that has the XML nodes to process.</param> /// <param name="hashAlg">the <see cref="HashAlgorithm"/>to use</param> /// <returns>the hash of the processed XML nodes.</returns> public abstract byte[] ProcessAndDigest(XmlTokenStream tokenStream, HashAlgorithm hashAlg);