public void GetExamCopy()
{
// try
{
HighSecurity = highSecChkBox.Checked;
//Create a client to connecto to phone book service on local server and
//10048 TCP port.
client = ScsServiceClientBuilder.CreateClient <INetworkExamService>(
new ScsTcpEndPoint(ipTxtBox.Text, int.Parse(portTxtBox.Text)));
// client.Timeout = 3;
aLogger.LogMessage($"Trying to connect to the server (timeout {client.Timeout} Seconds)", LogMsgType.Verbose);
//Connect to the server
client.Connect();
aLogger.LogMessage("Connected to server", LogMsgType.Verbose);
RequiredDetails requiredDetails = new RequiredDetails(studentNameTxtBox.Text, studentIDTxtBox.Text, examKeyTxtBox.Text, (HighSecurity? sharedKeyISTxtBox.Text:"Low Security Settings Selected"));
//Add some persons
var copy = client.ServiceProxy.GetExamCopyEncryptedZipped(requiredDetails);
requiredDetails.DecryptDetails(examKeyTxtBox.Text);
if (!ExamHelper.ValidateExamCopy(copy, examKeyTxtBox.Text, aLogger, sharedKeyISTxtBox.Text,
(highSecChkBox.Checked ? Security.FilterationSecurityLevel.High : Security.FilterationSecurityLevel.Moderate), requiredDetails.SequenceNumber))
{
return;
}
aLogger.LogMessage("Received Exam Copy", LogMsgType.Verbose);
aLogger.LogMessage("Checking Exam Copy...", LogMsgType.Verbose);
var exam = Quizez.ExamHelper.GetExamFromByteArray(copy, examKeyTxtBox.Text, sharedKeyISTxtBox.Text,
(highSecChkBox.Checked?Security.FilterationSecurityLevel.High:Security.FilterationSecurityLevel.Moderate));
aLogger.LogMessage("Exam Checked Correcly ...", LogMsgType.Verbose);
//Disconnect from server
// client.Disconnect();
// aLogger.LogMessage("Disconnected from server", LogMsgType.Verbose);
anExam = exam;
}
// catch (Exception ex)
{
// aLogger.LogMessage(ex.Message, LogMsgType.Error);
}
}
public FilterationResult IsValidSubmission(RequiredDetails details, string srcIP)
{
details.DecryptDetails(ExamKey);
if (SecurityLevel == FilterationSecurityLevel.Moderate)
{
return(ModerateFilterationProcessSubmit(details));
}
else if (SecurityLevel == FilterationSecurityLevel.High)
{
return(HighFilterationProcessRequestSubmit(details, srcIP));
}
return(FilterationResult.DroppedUnknown); //Fail Safe
}
public FilterationRequestResult GenerateExamCopyForSendingToStudent(Exam orgExamCopyEmpty, RequiredDetails details, string srcIP)
{
details.DecryptDetails(ExamKey);
var filterResult = IsValidRequest(details, srcIP);
if (filterResult != FilterationResult.Accepted)
{
throwFirewallException(filterResult, $"IP:{srcIP}");
return(new FilterationRequestResult(filterResult, null));
}
var v = GetIV(details);
details.SequenceNumber = (long.Parse(details.SequenceNumber) + 1).ToString();
details.VEncryptedWithKI = ExamHelper.GetVAsByteArray(v, InstructorPassword);
var examInstance = orgExamCopyEmpty;
examInstance.RequiredStudentDetails = details; //we received this from the student
// examInstance.RequiredStudentDetails.SetV_CompressedEncryptedWithKI(v, InstructorPassword);
//if(examInstance.RequiredStudentDetails.VEncryptedWithKI== null)
//{
// MessageBox.Show("Set To Null");
//}
//else
//{
// MessageBox.Show("examInstance.RequiredStudentDetails.VEncryptedWithKI");
//}
return(new FilterationRequestResult(filterResult, ExamHelper.GetExamFileWithoutSave(examInstance, ExamKey, details.SharedKeyIS, SecurityLevel)));
}
