public static ECIESProcessResult processMessage(string key, string message)
{
byte[] sharedKey = Encoding.ASCII.GetBytes(key);
byte[] Kenc = KDF.DeriveKey(sharedKey, KDF.DefaultRoundsEnc);
byte[] Kmac = KDF.DeriveKey(sharedKey, KDF.DefaultRoundsMac);
AesEncryptionProvider aes = new AesEncryptionProvider(Kenc);
byte[] encryptedMessage = aes.Encrypt(message, Kenc);
byte[] signedMessage = MAC.GetTag(encryptedMessage, Kmac);
return(new()
{
Tag = Encoding.ASCII.GetString(signedMessage),
EncryptedMessage = Encoding.ASCII.GetString(encryptedMessage)
});
}