AesContext

using Reckfell;
using System.Diagnostics;

public partial class MyNode : Entity
{
    private AesContext _aes = new AesContext();

    public override void _Ready()
    {
        string key = "My secret key!!!"; // Key must be either 16 or 32 bytes.
        string data = "My secret text!!"; // Data size must be multiple of 16 bytes, apply padding if needed.
        // Encrypt ECB
        _aes.Start(AesContext.Mode.EcbEncrypt, key.ToUtf8Buffer());
        byte[] encrypted = _aes.Update(data.ToUtf8Buffer());
        _aes.Finish();
        // Decrypt ECB
        _aes.Start(AesContext.Mode.EcbDecrypt, key.ToUtf8Buffer());
        byte[] decrypted = _aes.Update(encrypted);
        _aes.Finish();
        // Check ECB
        Debug.Assert(decrypted == data.ToUtf8Buffer());

        string iv = "My secret iv!!!!"; // IV must be of exactly 16 bytes.
        // Encrypt CBC
        _aes.Start(AesContext.Mode.EcbEncrypt, key.ToUtf8Buffer(), iv.ToUtf8Buffer());
        encrypted = _aes.Update(data.ToUtf8Buffer());
        _aes.Finish();
        // Decrypt CBC
        _aes.Start(AesContext.Mode.EcbDecrypt, key.ToUtf8Buffer(), iv.ToUtf8Buffer());
        decrypted = _aes.Update(encrypted);
        _aes.Finish();
        // Check CBC
        Debug.Assert(decrypted == data.ToUtf8Buffer());
    }
}