private static EncryptionResultViewModel EncryptStringToBytes(string plainText)
{
EncryptionResultViewModel result = new EncryptionResultViewModel();
try
{
// ********************************************************************
// ****** Encryption Key must be 256 bits long (32 bytes) ******
// ****** If it is longer than 32 bytes it will be truncated. ******
// ****** If it is shorter than 32 bytes it will be padded ******
// ****** with upper-case Xs. ******
// ********************************************************************
var randomKey = RandomString();
var key = MyKey + randomKey;
var intLength = key.Length;
if (intLength >= 32)
{
key = Left(key, 32);
}
else
{
var intRemaining = 32 - intLength;
key = key + new string(Convert.ToChar("X"), intRemaining);
}
var byteKey = Encoding.ASCII.GetBytes(key.ToCharArray());
// Create an RijndaelManaged object
// with the specified key and IV.
using (RijndaelManaged rijndaelManaged = new RijndaelManaged())
{
// Create an encryptor to perform the stream transform.
ICryptoTransform encryptor = rijndaelManaged.CreateEncryptor(byteKey, ByteIv);
// create the streams used for encryption
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter sw = new StreamWriter(cs))
{
// write all data to the stream
sw.Write((plainText));
}
result.EncryptedString = ConvertArrayToB64String(ms.ToArray());
}
}
result.UniqueKey = randomKey;
result.Success = true;
}
}
catch (Exception e)
{
// ignored
}
return(result);
}
/// <summary>
/// Encrypt sensitive data with Rijndael
/// </summary>
/// <param name="oInput"></param>
/// <returns></returns>
public static EncryptionResultViewModel Encrypt(object oInput)
{
EncryptionResultViewModel result = new EncryptionResultViewModel();
string cInput = null;
if (oInput != null)
{
cInput = Convert.ToString(oInput);
if (!string.IsNullOrEmpty(cInput))
{
result = EncryptStringToBytes(cInput);
}
}
return(result);
}