public Base64 Encrypt(string userInput)
{
string sanitisedUserInput = userInput.Replace(";", String.Empty).Replace("=", String.Empty);
string padded = prepend + sanitisedUserInput + append;
return(cipher.Encrypt(key, padded, iv));
}
public EncryptedData GetEncryptedCookie()
{
string[] lines = File.ReadAllLines(SessionValues);
string line = lines[random.Next(lines.Length)];
decoded = new Base64(line).Decode();
string iv = helper.GenerateKey().ToString();
return(new EncryptedData(cipherCBC.Encrypt(key, decoded, iv), iv));
}
public Tuple <Base64, string> EncryptWithRandomPadding(string data)
{
string plainText = PadData(data);
if (random.Next(2) == 1)
{
return(new Tuple <Base64, string>(cipherCBC.Encrypt(plainText), "CBC"));
}
else
{
return(new Tuple <Base64, string>(cipherECB.Encrypt(plainText), "EBC"));
}
}
public void EncryptAndDecryptCBC()
{
Random r = new Random();
byte[] bytes = new byte[r.Next(100)];
r.NextBytes(bytes);
string data = new Bytes(bytes).ToString();
string key = "YELLOW SUBMARINE";
string iv = new String('\0', blockSize);
AESCipherCBC aes = new AESCipherCBC();
Base64 encrypted = aes.Encrypt(key, data, iv);
string decrypted = aes.Decrypt(key, encrypted, iv);
Assert.AreEqual(data, decrypted);
}