public static string Attack(byte[] bytes)
{
var show_all = "";
if (bytes == null || !bytes.Any())
{
return($"No data found on device{Environment.NewLine}");
}
UInt64 canary = ToUInt64(bytes, MyKey.DoNotDecryptCanaryOffset);
if (canary != MyKey.DoNotDecryptCanary)
{
// Decrypt data, with key 123321, length 208
DecryptData(bytes, 123321, 208);
}
// validate CRC is ok. (length 210, since two last bytes is crc)
if (!Crc.CheckCrc14443(Crc.CRC16_14443_A, bytes, 210))
{
return($"Data failed CRC check{Environment.NewLine}");
}
/*
* Data layout
* first 16byte is Sector0, Block0
*
* then comes items of 16bytes length
* 0 auth cmd (0x60 or 0x61)
* 1 blocknumber (0 - 0x7F)
* 2,3 crc 2bytes
* 4,5,6,7 NT
* 8,9,10,11 NR
* 12,13,14,15 AR
*/
var uid = ToUInt32(bytes, 0);
var myKeys = new List <MyKey>();
// Copy nonce - data into object and list
for (int i = 0; i < 12; i++)
{
var mykey = new MyKey
{
UID = uid,
KeyType = bytes[(i + 1) * 16],
Block = bytes[(i + 1) * 16 + 1],
nt0 = ToUInt32(bytes, (i + 1) * 16 + 4),
nr0 = ToUInt32(bytes, (i + 1) * 16 + 8),
ar0 = ToUInt32(bytes, (i + 1) * 16 + 12)
};
mykey.Sector = ToSector(mykey.Block);
// skip sectors with 0xFF
if (mykey.Sector != 0xFF)
{
myKeys.Add(mykey);
}
}
var my_cmp = new KeyComparer();
myKeys.Sort(my_cmp);
show_all = KeyWorker(myKeys);
return(show_all);
}
