byte[][] IGXDLMSBase.Invoke(object sender, int index, Object parameters)
{
//Check reply_to_HLS_authentication
if (index == 8)
{
GXDLMSServerBase s = sender as GXDLMSServerBase;
if (s == null)
{
throw new ArgumentException("sender");
}
GXDLMS b = s.m_Base;
//Get server Challenge.
List <byte> challenge = null;
List <byte> CtoS = null;
//Find shared secret
foreach (GXAuthentication it in s.Authentications)
{
if (it.Type == b.Authentication)
{
CtoS = new List <byte>(it.SharedSecret);
challenge = new List <byte>(it.SharedSecret);
challenge.AddRange(b.StoCChallenge);
break;
}
}
byte[] serverChallenge = GXDLMS.Chipher(b.Authentication, challenge.ToArray(), null);
byte[] clientChallenge = (byte[])parameters;
int pos = 0;
if (GXCommon.Compare(clientChallenge, ref pos, serverChallenge))
{
CtoS.AddRange(b.CtoSChallenge);
return(s.Acknowledge(Command.WriteResponse, 0, GXDLMS.Chipher(b.Authentication, CtoS.ToArray(), null), DataType.OctetString));
}
else
{
//Return HW error.
return(s.ServerReportError(Command.MethodRequest, 1));
}
}
else
{
throw new ArgumentException("Invoke failed. Invalid attribute index.");
}
}