private void RegiterBtn_Click(object sender, EventArgs e)
{
connectionString = ConfigurationManager.ConnectionStrings["LoginSystemWithRSA"].ConnectionString;
using (SqlConnection con = new SqlConnection(connectionString))
{
string userName = UserNameTextbox.Text;
string password = UserNameTextbox.Text;
string email = EmailTextbox.Text;
#region for first RSA // For Encrypted password
// var rsaEnc = new RSAConfiguration();
// var encryptedPassword = rsaEnc.Encrypt(password); //
// var encryptedPassword = AESConfiguration.Encrypt(password); // For AES
#endregion
#region For msdn RSACSPSample
byte[] dataToEncrypt = Encoding.ASCII.GetBytes(password);
string hashPassword = string.Empty;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
var encryptedData = RSACSPSample.RSAEncrypt(dataToEncrypt, RSA.ExportParameters(false), false);
hashPassword = BitConverter.ToString(encryptedData);
}
#endregion
string query = "insert into tblUserRegistration values('" + userName + "', '" + hashPassword + "', '" + email + "')";
SqlCommand cmd = new SqlCommand(query, con);
try
{
con.Open();
var count = cmd.ExecuteNonQuery();
if (count > 0)
{
MessageBox.Show("Insert Successfully!");
}
else
{
MessageBox.Show("Unsuccessfully operation!");
}
}
catch (Exception ex)
{
MessageBox.Show("Exception thrown: " + ex.Message);
}
finally
{
con.Close();
}
}
}
static void Main(string[] args)
{
// 使用 DSACryptoServiceProvider 类创建哈希值的数字签名，然后验证签名。
DSACSPSample.DoTest();
// 使用 RSACryptoServiceProvider 类将一个字符串加密为一个字节数组，然后将这些字节解密为字符串。
RSACSPSample.DoTest();
Console.ReadLine();
}
private void SignInBtn_Click(object sender, EventArgs e)
{
var userName = UserNameTextbox.Text;
var password = PasswordTextBox.Text;
//// For Encrypted password
//var rsaEnc = new RSAConfiguration();
connectionString = ConfigurationManager.ConnectionStrings["LoginSystemWithRSA"].ConnectionString;
using (SqlConnection con = new SqlConnection(connectionString))
{
string query = "select * from tblUserRegistration where UserName = '******'";
SqlCommand cmd = new SqlCommand(query, con);
try
{
con.Open();
var reader = cmd.ExecuteReader();
if (reader != null)
{
int count = 0;
while (reader.Read())
{
string tempPass = reader["Password"].ToString();
string unhashPassword = string.Empty;
#region For msdn RSACSPSample
string tempPassword = reader["Password"].ToString();
var dataToEncrypt = Encoding.ASCII.GetBytes(tempPassword);
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
var decryptedData = RSACSPSample.RSADecrypt(dataToEncrypt, RSA.ExportParameters(true), false);
unhashPassword = BitConverter.ToString(decryptedData);
}
#endregion
if (unhashPassword == password)
{
count++;
break;
}
}
if (count > 0)
{
var homePage = new HomePage();
homePage.ShowDialog();
}
else
{
MessageBox.Show("Invalid username or password!");
}
}
reader.Close();
}
catch (Exception ex)
{
MessageBox.Show("Exception occured: " + ex);
}
finally
{
con.Close();
}
}
}
