/// <summary>
/// This method decrypts a string using the configuration settings supplied
/// </summary>
/// <param name="encryptedString">The encrypted string</param>
/// <returns>The passed in string, decrypted</returns>
public string DecryptString(string encryptedString)
{
string retVal = string.Empty;
if (!string.IsNullOrEmpty(encryptedString))
{
switch (this.EncryptionMethod)
{
case EncryptionMethodOptions.None:
retVal = encryptedString;
break;
case EncryptionMethodOptions.AES:
AESConfiguration aesconfiguration = AESConfiguration.GetInstance();
AESManager aesencryption = new AESManager(aesconfiguration.EncryptionKey, aesconfiguration.Salt);
retVal = aesencryption.Decrypt(encryptedString);
break;
case EncryptionMethodOptions.CertificateKeyFile:
KeyFileConfiguration keyfileConfiguration = KeyFileConfiguration.GetInstance();
X509CertificateManager keyfileEncryption = new X509CertificateManager(keyfileConfiguration.KeyFile, keyfileConfiguration.KeyFilePassword);
retVal = keyfileEncryption.Decrypt(encryptedString);
break;
case EncryptionMethodOptions.CertificateKeyStore:
KeyStoreConfiguration keystoreConfiguration = KeyStoreConfiguration.GetInstance();
X509CertificateManager keystoreEncryption = new X509CertificateManager(keystoreConfiguration.StoreName, keystoreConfiguration.StoreLocation, keystoreConfiguration.CertificateName);
retVal = keystoreEncryption.Decrypt(encryptedString);
break;
case EncryptionMethodOptions.RSAXmlKeyFile:
RSAXmlKeyFileConfiguration rsaxmlKeyFileConfiguration = RSAXmlKeyFileConfiguration.GetInstance();
RSAXmlKeyFileManager rsaxmlKeyFileEncryption = new RSAXmlKeyFileManager(rsaxmlKeyFileConfiguration.PublicKeyFile, rsaxmlKeyFileConfiguration.PrivateKeyFile);
retVal = rsaxmlKeyFileEncryption.Decrypt(encryptedString);
break;
}
}
return(retVal);
}
/// <summary>
/// Constructor with specified configuration
/// </summary>
/// <param name="aesConfiguration">The AES configuration instance</param>
public UserTransferManager(AESConfiguration aesConfiguration) : this(aesConfiguration.EncryptionKey, aesConfiguration.Salt)
{
}
/// <summary>
/// Default constructor
/// </summary>
public UserTransferManager() : this(AESConfiguration.GetInstance())
{
}
// For Login with AES password hash
private void BtnLoginAES_Click(object sender, EventArgs e)
{
var userName = UserNameTextbox.Text;
var password = PasswordTextBox.Text;
var encPassword = AESConfiguration.Encrypt(password);
connectionString = ConfigurationManager.ConnectionStrings["LoginSystemWithRSA"].ConnectionString;
using (SqlConnection con = new SqlConnection(connectionString))
{
string query = "select * from tblUserRegistration where UserName = '******' and Password='******'";
string cypher = string.Empty;
SqlCommand cmd = new SqlCommand(query, con);
try
{
con.Open();
var reader = cmd.ExecuteReader();
if (reader.HasRows)
{
var homePage = new HomePage();
homePage.ShowDialog();
}
else
{
MessageBox.Show("Failed to login");
}
reader.Close();
//con.Open();
//var reader = cmd.ExecuteReader();
//if (reader != null)
//{
// int count = 0;
// while (reader.Read())
// {
// string tempPass = reader["Password"].ToString();
// cypher = AESConfiguration.Decrypt(tempPass);
// if (cypher == 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();
}
}
}