public static void DecryptElement(XmlElement encryptedElement, string password)
{
RijndaelWrapper wrapper = new RijndaelWrapper(password);
EncryptedData data = new EncryptedData();
data.LoadXml(encryptedElement);
EncryptedXml result = new EncryptedXml();
byte[] decrypted = result.DecryptData(data, wrapper.SymmetricAlgorithm);
result.ReplaceData(encryptedElement, decrypted);
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="password"></param>
/// <param name="content">true to replace content, false to replace entire element</param>
public static void EncryptElement(XmlElement element, string password, bool content)
{
XmlDocument doc = element.OwnerDocument;
EncryptedXml eXml = new EncryptedXml(doc);
RijndaelWrapper wrapper = new RijndaelWrapper(password);
byte[] cipherText = eXml.EncryptData((XmlElement)doc.FirstChild.FirstChild, wrapper.SymmetricAlgorithm, content);
EncryptedData data = new EncryptedData();
data.EncryptionMethod = new EncryptionMethod(wrapper.Url);
data.CipherData = new CipherData(cipherText);
data.KeyInfo = new KeyInfo();
EncryptedXml.ReplaceElement(element, data, content);
}
public static void DecryptElement(XmlNode encryptedNode, string password)
{
RijndaelWrapper wrapper = new RijndaelWrapper(password);
string cipherXml = encryptedNode.InnerXml;
int begin = cipherXml.IndexOf(TAG_BEGIN) + TAG_BEGIN.Length;
int end = cipherXml.IndexOf(TAG_END);
string wholeSheBangString = cipherXml.Substring(begin, end - begin);
byte[] wholeShebang = EncryptionUtil.GetBytesFromBase64String(wholeSheBangString);
byte[] iv = new byte[wrapper.SymmetricAlgorithm.IV.Length];
byte[] cipherText = new byte[wholeShebang.Length - iv.Length];
Array.Copy(wholeShebang, iv, iv.Length);
Array.Copy(wholeShebang,iv.Length, cipherText, 0,wholeShebang.Length - iv.Length);
string plainXml = EncryptionUtil.GetString(wrapper.DecryptMessage(cipherText, iv));
IsLegalXmlText(plainXml);
encryptedNode.ParentNode.InnerXml = plainXml;
}
/// <summary>
///
/// </summary>
/// <param name="element"></param>
/// <param name="password"></param>
/// <param name="content">true to replace content, false to replace entire element</param>
public static void EncryptElement(XmlNode element, string password, bool content)
{
RijndaelWrapper wrapper = new RijndaelWrapper(password);
byte[] cipherXml;
if (!content)
cipherXml = wrapper.EncryptMessage(EncryptionUtil.GetBytes(element.OuterXml));
else
cipherXml = wrapper.EncryptMessage(EncryptionUtil.GetBytes(element.InnerXml));
byte[] iv = wrapper.SymmetricAlgorithm.IV;
byte[] wholeShebang = new byte[cipherXml.Length + iv.Length];
iv.CopyTo(wholeShebang, 0);
cipherXml.CopyTo(wholeShebang, iv.Length);
string encryptedMessage = EncryptionUtil.GetStringBase64(wholeShebang);
string encryptedElementAsString = string.Format(ENCRYPTED_DATA_TEMPLATE,wrapper.Url);
encryptedElementAsString = encryptedElementAsString.Replace(REPLACE_THIS, encryptedMessage);
if (!content)
element.ParentNode.InnerXml = encryptedElementAsString;
else
{
element.InnerXml = encryptedElementAsString;
}
}
