private byte[] ApplyProperDeciphering(byte[] receiveBuffer)
{
try
{
switch (State)
{
case (ProtocolState.WaitingSession):
List <string> targetFields = new List <string> {
"key", "iv"
};
XmlDocument document = ConvertUtils.ByteArrayToXMLDocument(receiveBuffer);
return(ConvertUtils.XmlDocumentToByteArray(RsaUtils.DecipherXmlDocument(document, GetDefaultKeyContainer(), targetFields)));
case (ProtocolState.GotSession):
return(AESUtils.DecipherByteArray(receiveBuffer, server.GetSessionKey(), server.GetNextIV()));
case (ProtocolState.GotSecret):
return(AESUtils.DecipherByteArray(receiveBuffer, server.GetSessionKey(), server.GetNextIV()));
case (ProtocolState.FailOnce):
return(AESUtils.DecipherByteArray(receiveBuffer, server.GetSessionKey(), server.GetNextIV()));
case (ProtocolState.FailTwice):
return(AESUtils.DecipherByteArray(receiveBuffer, server.GetSessionKey(), server.GetNextIV()));
default:
return(null);
}
}
catch (Exception)
{
return(null);
}
}