/// <summary>
/// Actual processor of the Hex Message from the smart meter
/// </summary>
/// <param name="DataRow">HEX message</param>
/// <returns></returns>
public virtual DataRow ProcessDataRow(string DataRow)
{
var aes = new AesGcmEncryption(this.DecryptionKey);
GXDLMSTranslator translator = new GXDLMSTranslator(TranslatorOutputType.SimpleXml);
translator.Comments = true;
translator.Hex = false;
translator.ShowStringAsHex = false;
//We have to call encrypt and not decrypt - this is how the EVN integration works at least :/
string hexStringDecrypted = aes.Encrypt(DataRow);
string xml = translator.PduToXml(hexStringDecrypted);
return(this.ParseXML(xml));
}
public void RoundTrip()
{
byte[] plainText = new byte[] { 0x8a, 0x07, 0xd2, 0xe7, 0x46, 0x4a, 0x0e, 0x11, 0xc4, 0x12, 0x01, 0x13, 0xc1, 0x68, 0xf9, 0x89 };
byte[] key = new byte[]
{
0xe9, 0xf9, 0x49, 0x75, 0x6b, 0x80, 0xca, 0x96, 0x79, 0xaf, 0x0e, 0xb6, 0xf1, 0x7c, 0x29, 0x57,
0x22, 0x5f, 0x67, 0x5b, 0x5e, 0xf6, 0x96, 0xe7, 0xab, 0x3e, 0x7f, 0x54, 0xfe, 0xc1, 0x65, 0x6c
};
var aesCounterMode = new AesGcmEncryption(key, new AesGcmWrapper(key));
byte[] cipherText = new byte[16];
byte[] tag = new byte[12];
aesCounterMode.Encrypt(plainText, 42, cipherText, tag);
byte[] roundTripResult = new byte[16];
aesCounterMode.Decrypt(cipherText, 42, roundTripResult, tag);
CollectionAssert.AreEqual(plainText, roundTripResult);
}