public bool authenticate_user(string ssn1, string key)
{
try
{
crypto c = new crypto();
int ssn = Convert.ToInt32(c.Decrypt(ssn1, key, true));
DataTable dt_auth = new DataTable();
string connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
string query = "select * from tbl_voter_master where ssn = " + ssn;
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(query, conn);
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt_auth);
conn.Close();
da.Dispose();
if (dt_auth.Rows.Count > 0)
{
TripleDESCryptoServiceProvider TDES = new TripleDESCryptoServiceProvider();
TDES.GenerateIV();
TDES.GenerateKey();
SqlParameter[] sp_validation_key = new SqlParameter[2];
sp_validation_key[0] = new SqlParameter("@ssn", ssn);
string validation = c.RandomString();
sp_validation_key[1] = new SqlParameter("@validation", validation);
string query1 = "update tbl_voter_master set validation_key = '" + validation + "' where ssn = " + ssn;
SqlConnection conn1 = new SqlConnection(connString);
SqlCommand cmd1 = new SqlCommand(query1, conn1);
conn1.Open();
SqlDataAdapter da1 = new SqlDataAdapter(cmd1);
da1.Fill(dt_auth);
conn1.Close();
da1.Dispose();
return(true);
}
else
{
return(false);
}
}
catch (Exception ex)
{
throw ex;
}
}
public void showResult()
{
crypto c = new crypto();
DataTable dt_results = new DataTable();
string connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
string query = "select * from tbl_CTF_Directory";
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(query, conn);
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt_results);
conn.Close();
da.Dispose();
DataTable dt_final = new DataTable();
dt_final.Columns.AddRange(new DataColumn[1] {
new DataColumn("vote", typeof(string))
});
for (int i = 0; i < dt_results.Rows.Count; i++)
{
dt_final.Rows.Add(c.Decrypt(dt_results.Rows[i]["vote"].ToString(), dt_results.Rows[i]["ssn"].ToString(), true));
}
DataTable dt_cadidate = new DataTable();
connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
query = "select * from tbl_candidate_master";
conn = new SqlConnection(connString);
cmd = new SqlCommand(query, conn);
conn.Open();
da = new SqlDataAdapter(cmd);
da.Fill(dt_cadidate);
conn.Close();
da.Dispose();
DataTable dt_display = new DataTable();
dt_display.Columns.AddRange(new DataColumn[2] {
new DataColumn("Name", typeof(string)),
new DataColumn("vote", typeof(string))
});
int cad1 = 0;
int cad2 = 0;
for (int i = 0; i < dt_final.Rows.Count; i++)
{
if (Convert.ToInt32(dt_final.Rows[i]["vote"].ToString()) == 1)
{
cad1++;
}
else if (Convert.ToInt32(dt_final.Rows[i]["vote"].ToString()) == 2)
{
cad2++;
}
}
dt_display.Rows.Add(dt_cadidate.Rows[0]["c_name"].ToString(), cad1);
dt_display.Rows.Add(dt_cadidate.Rows[1]["c_name"].ToString(), cad2);
for (int i = 0; i < dt_display.Rows.Count; i++)
{
Console.WriteLine(dt_display.Rows[i]["Name"].ToString() + " : " + dt_display.Rows[i]["vote"].ToString());
}
}
static void Main(string[] args)
{
CLA cla = new CLA();
crypto c = new crypto();
Console.WriteLine("Enter Your SSN to validate. or Enter 0 for result. \n");
String ssn = Console.ReadLine();
if (ssn.Equals("0") == true)
{
CTF ctf = new CTF();
ctf.showResult();
}
else
{
Console.WriteLine();
if (cla.authenticate_user(c.Encrypt(ssn, ssn, true), ssn) == true)
{
DataTable dt_votechk = new DataTable();
string connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
string query = "select * from tbl_CTF_Directory where ssn = '" + ssn + "'";
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(query, conn);
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt_votechk);
conn.Close();
da.Dispose();
if (dt_votechk.Rows.Count > 0)
{
Console.WriteLine("already voted.");
}
else
{
DataTable dt_voter = new DataTable();
connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
query = "select * from tbl_voter_master where ssn = '" + ssn + "'";
conn = new SqlConnection(connString);
cmd = new SqlCommand(query, conn);
conn.Open();
da = new SqlDataAdapter(cmd);
da.Fill(dt_voter);
conn.Close();
da.Dispose();
string validation = c.Encrypt(dt_voter.Rows[0]["validation_key"].ToString(), ssn, true);
Console.WriteLine("***********************************************");
Console.WriteLine("here are voter's list.");
DataTable dt_can = new DataTable();
string connString1 = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
string query1 = "select id, c_name from tbl_candidate_master";
SqlConnection conn1 = new SqlConnection(connString1);
SqlCommand cmd1 = new SqlCommand(query1, conn1);
conn1.Open();
SqlDataAdapter da1 = new SqlDataAdapter(cmd1);
da1.Fill(dt_can);
conn1.Close();
da1.Dispose();
for (int i = 0; i < dt_can.Rows.Count; i++)
{
Console.WriteLine("press " + dt_can.Rows[i]["id"].ToString() + " for " + dt_can.Rows[i]["c_name"].ToString());
}
Console.WriteLine("***********************************************");
Console.Write("Enter yout vote: ");
string vote = Console.ReadLine();
DataTable dt = new DataTable();
connString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
query = "insert into tbl_CTF_Directory (ssn, vote, validation) values(" + Convert.ToInt32(ssn) + ", '" + c.Encrypt(vote, ssn, true) + "', '" + c.Decrypt(validation, ssn, true) + "')";
conn = new SqlConnection(connString);
cmd = new SqlCommand(query, conn);
conn.Open();
da = new SqlDataAdapter(cmd);
da.Fill(dt);
conn.Close();
da.Dispose();
Console.WriteLine("vote is secured.");
}
}
else
{
Console.WriteLine("invalid ssn.");
}
}
Console.ReadLine();
}
