private void insertKey(Guid eid)
{
var n = Int32.Parse(txtLength.Text.Trim());
var eg = new ElGamal.ElGamal();
var keys = eg.KeyGen(n);
log("Secret Key="+keys.Item2.Item2.ToString());
var cmd = dbConn.CreateCommand();
cmd.CommandText = " INSERT INTO PublicKeys (ID, g, p, q, pk, Type, ElectionID) " +
" VALUES (@ID, @g, @p, @q, @pk, @Type, @ElectionID) ";
cmd.Parameters.AddWithValue("@ID", System.Guid.NewGuid());
cmd.Parameters.AddWithValue("@g", keys.Item1.Item1.Item1);
cmd.Parameters.AddWithValue("@p", keys.Item1.Item1.Item2);
cmd.Parameters.AddWithValue("@q", keys.Item1.Item1.Item3);
cmd.Parameters.AddWithValue("@pk", keys.Item1.Item2);
cmd.Parameters.AddWithValue("@Type", 0);
cmd.Parameters.AddWithValue("@ElectionID", eid.ToString());
cmd.ExecuteNonQuery();
}
public Tuple<BigInteger, BigInteger> doEncrypt(int vote)
{
var eg = new ElGamal.ElGamal();
var pk = retrieveKey();
var c = eg.Encrypt(vote, pk, FSharpOption<BigInteger>.None);
log("Cipher" + c.ToString());
return c;
}
internal void Decrypt()
{
var options = retrieveElectionOptions();
var counters = new Dictionary<int,int>();
foreach (var item in options)
counters.Add(item.Value, 0);
var votes = retrieveVotes();
var pk = retrieveKey();
string[] lines = System.IO.File.ReadAllLines(@"SK.txt");
var k = BigInteger.Parse(lines[0]);
Tuple<Tuple<BigInteger, BigInteger, BigInteger>, BigInteger> sk =
Tuple.Create(pk.Item1, k);
var eg = new ElGamal.ElGamal();
var sum = new BigInteger(0);
foreach (var vote in votes)
{
var m = (int)eg.Decrypt(vote, sk);
log("Decrypted vote " + vote + " to " + m);
if (counters.ContainsKey(m))
counters[m]++;
}
foreach (var res in counters)
log("Option " + res.Key + " Received " + res.Value + " Votes ");
}
