private void ok_Click(object sender, EventArgs e) { if (master.Text == "") { MessageBox.Show("Enter a valid password"); return; } if (cnt.count == 0) { char[] plain_pk; cnt.count++; Stream streamc1 = new FileStream("count", FileMode.Create); BinaryFormatter bformatterc1 = new BinaryFormatter(); bformatterc1.Serialize(streamc1, cnt); streamc1.Close(); string ms = master.Text; md5 ob = new md5(); Byte[] hash = ob.md(ms); Stream fi = new FileStream("geeky", FileMode.Create); fi.Write(hash, 0, hash.Length); fi.Close(); cr.AssignNewKey(); //MessageBox.Show("wait!"); Stream sm = new FileStream("privatekey.xml", FileMode.Open); byte[] pvt = new byte[(int)sm.Length + 1]; sm.Read(pvt, 0, (int)sm.Length); sm.Close(); plain_pk = new char[pvt.Length + 1]; //convert byte array-pvt to char array and encrypt i = 0; while (i < pvt.Length) { plain_pk[i] = Convert.ToChar(pvt[i]); i++; } encrypt_double ed = new encrypt_double(); char[] cipher_pk = ed.encrypt(plain_pk, ms.ToCharArray()); //convert cipher_pk to byte array and write it byte[] towrite = new byte[cipher_pk.Length + 1]; i = 0; while (i < cipher_pk.Length) { towrite[i] = Convert.ToByte(cipher_pk[i]); i++; } Stream sm1 = new FileStream("privatekey.xml", FileMode.Create); sm1.Write(towrite, 0, towrite.Length); sm1.Close(); } else { string ms = master.Text; md5 ob = new md5(); Byte[] newhash = ob.md(ms); Byte[] oldhash = new Byte[newhash.Length + 1]; Stream fi = new FileStream("geeky", FileMode.Open); fi.Read(oldhash, 0, newhash.Length); fi.Close(); int i = 0; t = 0; while (i < oldhash.Length && i < newhash.Length) { if (oldhash[i] != newhash[i]) { t = 1; MessageBox.Show("Wrong Password!"); break; } i++; } if (t == 0) { MessageBox.Show("Welcome"); } } if (t == 0) { ok.Visible = false; master.Visible = false; enter.Visible = false; textBox1.Enabled = true; insert.Enabled = true; serialize.Enabled = true; password.Enabled = true; id.Visible = true; pwd.Visible = true; label2.Visible = true; label3.Visible = true; label4.Visible = true; store.Enabled = true; retrieve.Enabled = true; master_password = master.Text; } }