CryptoTools

CryptoTools.cs

/// <summary>
/// Encrypt data with AesCryptoServiceProvider, which should use FIPS 140-2 compliant library
/// </summary>
/// <param name="key"></param>
/// <param name="IV"></param>
/// <param name="data"></param>
/// <returns></returns>
public byte[] EncryptDataAESCryptoServiceProvider(byte[] key, byte[] IV, object data)
{
    byte[] encryptedData;
    using (AesCryptoServiceProvider Aes = new AesCryptoServiceProvider())
    {
        Aes.Mode = CipherMode.CBC;
        ICryptoTransform t = Aes.CreateEncryptor(key, IV);
        BinaryFormatter bf = new BinaryFormatter();
        using (MemoryStream ms = new MemoryStream())
        {
            using (CryptoStream cs = new CryptoStream(ms, t, CryptoStreamMode.Write))
            {
                bf.Serialize(cs, data);
                cs.FlushFinalBlock();
                cs.Close();
                encryptedData = ms.ToArray();
            }
        }
    }
    return encryptedData;
}
/// <summary>
/// Decrypt data with AesCryptoServiceProvider, which should use FIPS 140-2 compliant library
/// </summary>
/// <param name="key"></param>
/// <param name="IV"></param>
/// <param name="data"></param>
/// <returns></returns>
public static object DecryptDataAESCryptoServiceProvider(byte[] key, byte[] IV, byte[] data)
{
    object decryptedData;
    using (AesCryptoServiceProvider Aes = new AesCryptoServiceProvider())
    {
        Aes.Mode = CipherMode.CBC;
        ICryptoTransform t = Aes.CreateDecryptor(key, IV);
        BinaryFormatter bf = new BinaryFormatter();
        using (MemoryStream ms = new MemoryStream(data))
        {
            using (CryptoStream cs = new CryptoStream(ms, t, CryptoStreamMode.Read))
            {
                decryptedData = bf.Deserialize(cs);
                cs.Close();
            }
        }
    }
    return decryptedData;
}
/// <summary>
/// Encrypt byte array.
/// </summary>
/// <param name="key"></param>
/// <param name="IV"></param>
/// <param name="data"></param>
/// <returns></returns>
public static byte[] EncryptData(byte[] key, byte[] IV, object data)
{
    byte[] encryptedData;
    RijndaelManaged rj = new RijndaelManaged();

    rj.Mode = CipherMode.CBC;

    ICryptoTransform t = rj.CreateEncryptor(key, IV);
    BinaryFormatter bf = new BinaryFormatter();
    using (MemoryStream ms = new MemoryStream())
    {
        using (CryptoStream cs = new CryptoStream(ms, t, CryptoStreamMode.Write))
        {
            bf.Serialize(cs, data);
            cs.FlushFinalBlock();
            cs.Close();
            encryptedData = ms.ToArray();
        }
    }
    return encryptedData;
}
/// <summary>
/// Decrypt byte array
/// </summary>
/// <param name="key"></param>
/// <param name="IV"></param>
/// <param name="data"></param>
/// <returns></returns>
public static object DecryptData(byte[] key, byte[] IV, byte[] data)
{
    object decryptedData;
    RijndaelManaged rj = new RijndaelManaged();
    rj.Mode = CipherMode.CBC;

    ICryptoTransform t = rj.CreateDecryptor(key, IV);
    BinaryFormatter bf = new BinaryFormatter();
    using (MemoryStream ms = new MemoryStream(data))
    {
        using (CryptoStream cs = new CryptoStream(ms, t, CryptoStreamMode.Read))
        {
            decryptedData = bf.Deserialize(cs);
            cs.Close();
        }
    }
    return decryptedData;
}