private bool ProcessEncryptedDataItem(XmlElement encryptedDataElement)
{
// first see whether we want to ignore this one
if (ExceptUris.Count > 0)
{
for (int index = 0; index < ExceptUris.Count; index++)
{
if (IsTargetElement(encryptedDataElement, (string)ExceptUris[index]))
{
return(false);
}
}
}
EncryptedData ed = new EncryptedData();
ed.LoadXml(encryptedDataElement);
SymmetricAlgorithm symAlg = EncryptedXml.GetDecryptionKey(ed, null);
if (symAlg == null)
{
throw new CryptographicException(SR.Cryptography_Xml_MissingDecryptionKey);
}
byte[] decrypted = EncryptedXml.DecryptData(ed, symAlg);
ReplaceEncryptedData(encryptedDataElement, decrypted);
return(true);
}
public override object GetOutput()
{
XmlDocument document;
if (inputObj is Stream)
{
document = new XmlDocument();
document.PreserveWhitespace = true;
document.XmlResolver = GetResolver();
document.Load(new XmlSignatureStreamReader(
new StreamReader(inputObj as Stream)));
}
else if (inputObj is XmlDocument)
{
document = inputObj as XmlDocument;
}
else
{
throw new NullReferenceException();
}
XmlNodeList nodes = document.GetElementsByTagName("EncryptedData", EncryptedXml.XmlEncNamespaceUrl);
foreach (XmlNode node in nodes)
{
if (node == document.DocumentElement && exceptUris.Contains("#xpointer(/)"))
{
break;
}
// Need to exclude based on ExceptURI. Only accept #id references.
foreach (string uri in exceptUris)
{
if (IsTargetElement((XmlElement)node, uri.Substring(1)))
{
break;
}
}
EncryptedData encryptedData = new EncryptedData();
encryptedData.LoadXml((XmlElement)node);
SymmetricAlgorithm symAlg = EncryptedXml.GetDecryptionKey(encryptedData, encryptedData.EncryptionMethod.KeyAlgorithm);
EncryptedXml.ReplaceData((XmlElement)node, EncryptedXml.DecryptData(encryptedData, symAlg));
}
return(document);
}
public void GetDecryptionKey_StringNull ()
{
EncryptedXml ex = new EncryptedXml ();
Assert.IsNull (ex.GetDecryptionKey (new EncryptedData (), null));
}
public void GetDecryptionKey_EncryptedDataNull ()
{
EncryptedXml ex = new EncryptedXml ();
ex.GetDecryptionKey (null, EncryptedXml.XmlEncAES128Url);
}
