private void DecryptEncryptedGrants(XmlNodeList encryptedGrantList, IRelDecryptor decryptor)
{
XmlElement encryptionMethod = null;
XmlElement keyInfo = null;
XmlElement cipherData = null;
EncryptionMethod encryptionMethodObj = null;
KeyInfo keyInfoObj = null;
CipherData cipherDataObj = null;
for (int i = 0, count = encryptedGrantList.Count; i < count; i++)
{
encryptionMethod = encryptedGrantList[i].SelectSingleNode("//r:encryptedGrant/enc:EncryptionMethod", _namespaceManager) as XmlElement;
keyInfo = encryptedGrantList[i].SelectSingleNode("//r:encryptedGrant/dsig:KeyInfo", _namespaceManager) as XmlElement;
cipherData = encryptedGrantList[i].SelectSingleNode("//r:encryptedGrant/enc:CipherData", _namespaceManager) as XmlElement;
if ((encryptionMethod != null) &&
(keyInfo != null) &&
(cipherData != null))
{
encryptionMethodObj = new EncryptionMethod();
keyInfoObj = new KeyInfo();
cipherDataObj = new CipherData();
encryptionMethodObj.LoadXml(encryptionMethod);
keyInfoObj.LoadXml(keyInfo);
cipherDataObj.LoadXml(cipherData);
MemoryStream toDecrypt = null;
Stream decryptedContent = null;
StreamReader streamReader = null;
try
{
toDecrypt = new MemoryStream(cipherDataObj.CipherValue);
decryptedContent = _relDecryptor.Decrypt(encryptionMethodObj,
keyInfoObj, toDecrypt);
if ((decryptedContent == null) || (decryptedContent.Length == 0))
{
throw new CryptographicException(SR.Cryptography_Xml_XrmlUnableToDecryptGrant);
}
streamReader = new StreamReader(decryptedContent);
string clearContent = streamReader.ReadToEnd();
encryptedGrantList[i].ParentNode.InnerXml = clearContent;
}
finally
{
if (toDecrypt != null)
{
toDecrypt.Close();
}
if (decryptedContent != null)
{
decryptedContent.Close();
}
if (streamReader != null)
{
streamReader.Close();
}
}
encryptionMethodObj = null;
keyInfoObj = null;
cipherDataObj = null;
}
encryptionMethod = null;
keyInfo = null;
cipherData = null;
}
}
