private ByteArray GenerateExAuthMAC2(ByteArray command, ByteArray terminalCryptogram)
{
ByteArray input = command.Extract(0, 5) + terminalCryptogram + new ByteArray("80 00 00");
ByteArray mac_key_left = _sessionKeys.SignKey.MSB(8); //MSB mac key
ByteArray mac_key_right = _sessionKeys.SignKey.LSB(8);
ByteArray iv = new ByteArray(8, 0x00);
//ByteArray result = input.EncodeAsData(SessionKeys.SignKey, new ByteArray(8), PaddingMode.None, CipherMode.CBC);
//ByteArray result = input.EncodeAsData(mac_key_left + mac_key_right, iv, PaddingMode.None, CipherMode.CBC);
//ByteArray result_comp = result.LSB(8);
ByteArray apdu_left = input.MSB(8);
ByteArray apdu_right = input.LSB(8);
ByteArray result1 = apdu_left.SimpleEncodeAsData(mac_key_left, iv, PaddingMode.None, CipherMode.CBC);
ByteArray result2 = result1.XOR(apdu_right);
ByteArray result3 = result2.SimpleEncodeAsData(mac_key_left, iv, PaddingMode.None, CipherMode.CBC);
ByteArray result4 = result3.SimpleDecodeAsData(mac_key_right, iv, PaddingMode.None, CipherMode.CBC);
ByteArray result5 = result4.SimpleEncodeAsData(mac_key_left, iv, PaddingMode.None, CipherMode.CBC);
Logger.Log("[JavaCard] Wyliczanie MAC dla APDU {0} (kolejne wyniki algorytmu DES)\n{1}\n{2}\n{3}\n{4}\n{5}", input, result1, result2, result3, result4, result5);
return(result5);
}
private void ComputeSessionKeys(JavaCardKeys keys, ByteArray terminalRandom, ByteArray cardRandom)
{
//scp01
ByteArray dataDiversifier = cardRandom.LSB(4) + terminalRandom.MSB(4) + cardRandom.MSB(4) + terminalRandom.LSB(4);
_sessionKeys = new JavaCardKeys();
_sessionKeys.AuthEncKey = dataDiversifier.EncodeAsData(keys.AuthEncKey, new ByteArray(8), PaddingMode.None, CipherMode.ECB);
_sessionKeys.SignKey = dataDiversifier.EncodeAsData(keys.SignKey, new ByteArray(8), PaddingMode.None, CipherMode.ECB);
_sessionKeys.KEKKey = keys.KEKKey;
Logger.Log("[JavaCard] Liczenie kluczy sesyjnych\n{0}:\t{1}\n{2}:\t{3}\n{4}:\t{5}", "Auth/Enc", _sessionKeys.AuthEncKey, "Mac", _sessionKeys.SignKey, "Kek", _sessionKeys.KEKKey);
}
private void ComputeSessionKeys2(JavaCardKeys keys, ByteArray terminalRandom, ByteArray cardRandom)
{
_sessionKeys = new JavaCardKeys();
ByteArray dataDiversifierAuthEnc = new ByteArray("0182") + cardRandom.MSB(2) + new ByteArray(12);
_sessionKeys.AuthEncKey = dataDiversifierAuthEnc.EncodeAsData(keys.AuthEncKey, new ByteArray(8), PaddingMode.None, CipherMode.CBC);
ByteArray dataDiversifierSignC = new ByteArray("0101") + cardRandom.MSB(2) + new ByteArray(12);
_sessionKeys.SignKeyC = dataDiversifierSignC.EncodeAsData(keys.SignKey, new ByteArray(8), PaddingMode.None, CipherMode.CBC);
ByteArray dataDiversifierSignR = new ByteArray("0102") + cardRandom.MSB(2) + new ByteArray(12);
_sessionKeys.SignKeyR = dataDiversifierSignR.EncodeAsData(keys.SignKey, new ByteArray(8), PaddingMode.None, CipherMode.CBC);
ByteArray dataDiversifierKEK = new ByteArray("0181") + cardRandom.MSB(2) + new ByteArray(12);
_sessionKeys.KEKKey = dataDiversifierKEK.EncodeAsData(keys.KEKKey, new ByteArray(8), PaddingMode.None, CipherMode.CBC);
Logger.Log("[JavaCard] Liczenie kluczy sesyjnych\n{0}:\t{1}\n{2}:\t{3}\n{4}:\t{5}\n{6}:\t{7}", "Auth/Enc", _sessionKeys.AuthEncKey, "Mac-C", _sessionKeys.SignKeyC, "Mac-R", _sessionKeys.SignKeyR, "Kek", _sessionKeys.KEKKey);
}