mORMot Open Source

private void button1_Click(object sender, EventArgs e)
        {
            // define the key
            const string keyString = "12345678901234561234567890123456";
            ASCIIEncoding encoding = new ASCIIEncoding();
            Byte[] key = encoding.GetBytes(keyString);

            //  define the input
            const string inputString = "1234567890123456";
            Byte[] input = encoding.GetBytes(inputString);

            //  define the IV
            const string ivString = "0000000000000000";
            //System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
            Byte[] iv = encoding.GetBytes(ivString);

            //  TODO: introduce Using statement
            RijndaelManaged myAES = new RijndaelManaged
            {
                KeySize = 128,
                BlockSize = 128,
                Key = key,
                //IV = iv,
                Mode = CipherMode.ECB,
                Padding = PaddingMode.Zeros
            };

            // Create an encryptor to perform the stream transform.
            ICryptoTransform encryptor = myAES.CreateEncryptor(myAES.Key, myAES.IV);

            // Define memory stream which will be used to hold encrypted data.
            using (MemoryStream memoryStream = new MemoryStream())
            {
                // Define cryptographic stream (always use Write mode for encryption).
                CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);

                // Start encrypting.
                cryptoStream.Write(input, 0, input.Length);

                // Finish encrypting.
                cryptoStream.FlushFinalBlock();

                // Convert our encrypted data from a memory stream into a byte array.
                byte[] cipherTextBytes = memoryStream.ToArray();

                // Close both streams.
                memoryStream.Close();
                cryptoStream.Close();

                // Convert encrypted data into a readable format.
                //string cipherText = Convert.ToBase64String(cipherTextBytes);
                string cipherText = BitConverter.ToString(cipherTextBytes);

                // Return encrypted string.
                textBox1.Text = cipherText;
            }
        }