private static void WritePublicKeyValue(XmlWriter writer, CngKey key)
{
Contract.Requires(writer != null);
Contract.Requires(key != null && (key.AlgorithmGroup == CngAlgorithmGroup.ECDsa || key.AlgorithmGroup == CngAlgorithmGroup.ECDiffieHellman));
writer.WriteStartElement(PublicKeyRoot);
byte[] exportedKey = key.Export(CngKeyBlobFormat.EccPublicBlob);
BigInteger x;
BigInteger y;
NCryptNative.UnpackEccPublicBlob(exportedKey, out x, out y);
writer.WriteStartElement(XElement);
writer.WriteAttributeString(ValueAttribute, x.ToString("R", CultureInfo.InvariantCulture));
writer.WriteAttributeString(XsiNamespacePrefix, XsiTypeAttribute, XsiNamespace, XsiTypeAttributeValue);
writer.WriteEndElement(); // </X>
writer.WriteStartElement(YElement);
writer.WriteAttributeString(ValueAttribute, y.ToString("R", CultureInfo.InvariantCulture));
writer.WriteAttributeString(XsiNamespacePrefix, XsiTypeAttribute, XsiNamespace, XsiTypeAttributeValue);
writer.WriteEndElement(); // </Y>
writer.WriteEndElement(); // </PublicKey>
}
private static void WritePublicKeyValue(XmlWriter writer, CngKey key)
{
BigInteger integer;
BigInteger integer2;
writer.WriteStartElement("PublicKey");
NCryptNative.UnpackEccPublicBlob(key.Export(CngKeyBlobFormat.EccPublicBlob), out integer, out integer2);
writer.WriteStartElement("X");
writer.WriteAttributeString("Value", integer.ToString("R", CultureInfo.InvariantCulture));
writer.WriteAttributeString("xsi", "type", "http://www.w3.org/2001/XMLSchema-instance", "PrimeFieldElemType");
writer.WriteEndElement();
writer.WriteStartElement("Y");
writer.WriteAttributeString("Value", integer2.ToString("R", CultureInfo.InvariantCulture));
writer.WriteAttributeString("xsi", "type", "http://www.w3.org/2001/XMLSchema-instance", "PrimeFieldElemType");
writer.WriteEndElement();
writer.WriteEndElement();
}
