public Form1()
{
InitializeComponent();
string key = "secret key";
string plainText = "Hello, readers";
string encryptedText = SymmetricCryptoHelper.Encrypt(plainText, key);
string clearText = SymmetricCryptoHelper.Decrypt(encryptedText, key);
textBox1.Text = encryptedText + "\r\n" + clearText;
}
public static string Encrypt(string clearText, string key)
{
byte[] keyData = new byte[16];
byte[] sourceData = Encoding.Default.GetBytes(key);
int copyBytes = 16;
if (sourceData.Length < 16)
{
copyBytes = sourceData.Length;
}
Array.Copy(sourceData, keyData, copyBytes);
SymmetricCryptoHelper helper = new SymmetricCryptoHelper(keyData);
return(helper.Encrypt(clearText));
}
