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UltralightCard.cs
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UltralightCard.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Buffers.Binary;
using Iot.Device.Ndef;
#if DEBUG
using Microsoft.Extensions.Logging;
using nanoFramework.Logging;
#endif
namespace Iot.Device.Card.Ultralight
{
/// <summary>
/// A Ultralight card class
/// </summary>
public class UltralightCard
{
/// <summary>
/// Default password used for write and read
/// </summary>
public static readonly byte[] DefaultPassword = new byte[4] { 0xFF, 0xFF, 0xFF, 0xFF };
// This is the actual RFID reader
private readonly CardTransceiver _rfid;
#if DEBUG
private readonly ILogger _logger;
#endif
private byte[] _pack;
private byte _endAddress;
/// <summary>
/// The tag number detected by the reader, only 1 or 2
/// </summary>
public byte Target { get; set; }
/// <summary>
/// The NDEF capacity in bytes
/// </summary>
public int NdefCapacity { get; internal set; }
/// <summary>
/// The type of card
/// </summary>
public UltralightCardType UltralightCardType { get; internal set; }
/// <summary>
/// The block number to authenticate or read or write
/// </summary>
public byte BlockNumber { get; set; }
/// <summary>
/// The Data which has been read or to write for the specific block
/// </summary>
public byte[] Data { get; set; } = new byte[0];
/// <summary>
/// The command to execute on the card
/// </summary>
public UltralightCommand Command { get; set; }
/// <summary>
/// The counter to read or increment
/// </summary>
public byte Counter { get; set; }
/// <summary>
/// Authentication key
/// </summary>
public byte[] AuthenticationKey { get; set; } = DefaultPassword;
/// <summary>
/// UUID is the Serial Number, called MAC sometimes
/// </summary>
public byte[]? SerialNumber { get; set; }
/// <summary>
/// Check if this is a Ultralight card type
/// </summary>
/// <param name="ATQA">The ATQA</param>
/// <param name="SAK">The SAK</param>
/// <returns>True if this is an Ultralight</returns>
public static bool IsUltralightCard(ushort ATQA, byte SAK) => (ATQA == 0x0044) && (SAK == 0);
/// <summary>
/// Constructor for Ultralight
/// </summary>
/// <param name="rfid">A card transceiver class</param>
/// <param name="target">The target number as some card readers attribute one</param>
public UltralightCard(CardTransceiver rfid, byte target)
{
#if DEBUG
_logger = this.GetCurrentClassLogger();
#endif
_rfid = rfid;
Target = target;
// Try to get the version, if not sucessful than it's one of the early model or C
// See https://stackmirror.com/questions/37002498
GetVersion();
if ((Data != null) && (Data.Length == 8))
{
if ((Data[2] == 0x04) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0B))
{
NdefCapacity = 48;
UltralightCardType = UltralightCardType.UltralightNtag210;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0E))
{
NdefCapacity = 128;
UltralightCardType = UltralightCardType.UltralightNtag212;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0F))
{
NdefCapacity = 144;
UltralightCardType = UltralightCardType.UltralightNtag213;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x04) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0F))
{
NdefCapacity = 144;
UltralightCardType = UltralightCardType.UltralightNtag213F;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x11))
{
NdefCapacity = 504;
UltralightCardType = UltralightCardType.UltralightNtag215;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x13))
{
NdefCapacity = 888;
UltralightCardType = UltralightCardType.UltralightNtag216;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x04) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x13))
{
NdefCapacity = 888;
UltralightCardType = UltralightCardType.UltralightNtag216F;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x01) && (Data[6] == 0x13))
{
NdefCapacity = 888;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H1101;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x05) && (Data[4] == 0x02) && (Data[5] == 0x01) && (Data[6] == 0x13))
{
NdefCapacity = 888;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H1101W0;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x05) && (Data[4] == 0x02) && (Data[5] == 0x02) && (Data[6] == 0x13))
{
NdefCapacity = 888;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H2111W0;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x01) && (Data[6] == 0x15))
{
NdefCapacity = 1912;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H2101;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x05) && (Data[4] == 0x02) && (Data[5] == 0x01) && (Data[6] == 0x15))
{
NdefCapacity = 1912;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H1201W0;
}
else if ((Data[2] == 0x04) && (Data[3] == 0x05) && (Data[4] == 0x02) && (Data[5] == 0x02) && (Data[6] == 0x15))
{
NdefCapacity = 1912;
UltralightCardType = UltralightCardType.UltralightNtagI2cNT3H2211W0;
}
else if ((Data[2] == 0x03) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0B))
{
NdefCapacity = 48;
UltralightCardType = UltralightCardType.UltralightEV1MF0UL1101;
}
else if ((Data[2] == 0x03) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0B))
{
NdefCapacity = 48;
UltralightCardType = UltralightCardType.UltralightEV1MF0ULH1101;
}
else if ((Data[2] == 0x03) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0E))
{
NdefCapacity = 128;
UltralightCardType = UltralightCardType.UltralightEV1MF0UL2101;
}
else if ((Data[2] == 0x03) && (Data[3] == 0x02) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0E))
{
NdefCapacity = 128;
UltralightCardType = UltralightCardType.UltralightEV1MF0ULH2101;
}
else if ((Data[2] == 0x21) && (Data[3] == 0x01) && (Data[4] == 0x01) && (Data[5] == 0x00) && (Data[6] == 0x0E))
{
NdefCapacity = 128;
UltralightCardType = UltralightCardType.UltralightNtag203;
}
else
{
NdefCapacity = 1 << (Data[6] >> 1);
}
}
else
{
// Check if AuthenticationPart1 returns something
Command = UltralightCommand.ThreeDsAuthenticationPart1;
var res = RunUltralightCommand();
if (res > 0)
{
NdefCapacity = 144;
UltralightCardType = UltralightCardType.UltralightC;
}
else
{
// Then it's either a Ultralight or 203. Read block 41
Command = UltralightCommand.Read16Bytes;
res = RunUltralightCommand();
if (res > 0)
{
NdefCapacity = 137;
UltralightCardType = UltralightCardType.UltralightNtag203;
}
else
{
NdefCapacity = 144;
UltralightCardType = UltralightCardType.MifareUltralight;
}
}
}
}
/// <summary>
/// Get the version data
/// </summary>
/// <returns>Empty byte array if error, otherwise a 8 bytes array</returns>
public byte[] GetVersion()
{
Command = UltralightCommand.GetVersion;
var res = RunUltralightCommand();
if ((res == 8) && (Data is object))
{
return Data;
}
return new byte[0];
}
/// <summary>
/// Read at once multiple pages blocks of 4 bytes
/// </summary>
/// <param name="startPage">The start block</param>
/// <param name="endPage">The end block</param>
/// <returns>A buffer with the read bytes</returns>
public byte[] ReadFast(byte startPage, byte endPage)
{
BlockNumber = startPage < endPage ? startPage : endPage;
_endAddress = startPage > endPage ? startPage : endPage;
Command = UltralightCommand.ReadFast;
var ret = RunUltralightCommand();
return ret > 0 ? Data! : new byte[0];
}
/// <summary>
/// Run the last setup command. In case of reading bytes, they are automatically pushed into the Data property
/// </summary>
/// <returns>-1 if the process fails otherwise the number of bytes read</returns>
public int RunUltralightCommand()
{
byte[] dataOut = new byte[0];
bool awaitingData = false;
if (Command == UltralightCommand.Read16Bytes)
{
awaitingData = true;
dataOut = new byte[16];
}
else if (Command == UltralightCommand.ReadSignature)
{
awaitingData = true;
dataOut = new byte[32];
}
else if (Command == UltralightCommand.PasswordAuthentication)
{
awaitingData = true;
dataOut = new byte[2];
}
else if (Command == UltralightCommand.ReadFast)
{
awaitingData = true;
if ((_endAddress - BlockNumber) < 0)
{
throw new ArgumentException("For fast read, last block has to be more than first block");
}
dataOut = new byte[(_endAddress - BlockNumber + 1) * 4];
}
else if (Command == UltralightCommand.GetVersion)
{
awaitingData = true;
dataOut = new byte[8];
}
else if ((Command == UltralightCommand.ThreeDsAuthenticationPart1) || (Command == UltralightCommand.ThreeDsAuthenticationPart2))
{
awaitingData = true;
dataOut = new byte[9];
}
else if (Command == UltralightCommand.ReadCounter)
{
awaitingData = true;
dataOut = new byte[3];
}
var ret = _rfid.Transceive(Target, Serialize(), dataOut);
#if DEBUG
_logger.LogDebug($"{nameof(UltralightCommand)}: {Command}, Target: {Target}, Data: {BitConverter.ToString(Serialize())}, Success: {ret}, Dataout: {BitConverter.ToString(dataOut)}");
#endif
if ((ret > 0) && awaitingData)
{
Data = dataOut;
}
return ret;
}
/// <summary>
/// Check if a page is read only
/// </summary>
/// <param name="page">The page number</param>
/// <returns>True is read only</returns>
public bool IsPageReadOnly(byte page)
{
// Note: to improve this method, a caching mechanism can be put in place
// In general, this is used to check if something is password protected and not in
// an intense way
if (page <= 0x02)
{
return true;
}
// Read block 2
// byte 2
// bit 0 = page 03
// bit 1 = page 04-09
// bit 2 = page 0A-0F
// bit 3 = 03 as well
// bit 4 = 4
// bit 8 = 7
// Byte 3
// bit 0 = 8
// bit 7 = 15
// warning byte2 bit0, 1 and 2 are write once, once status changed, can't be changes again
if ((page >= 0x3) && page <= 0x7)
{
SpanByte toSend = new byte[2] { (byte)UltralightCommand.Read16Bytes, 2 };
SpanByte dataOut = new byte[16];
_rfid.Transceive(Target, toSend, dataOut);
return (dataOut[2] & (0b0000_0001 << page)) == (0b0000_0001 << page);
}
else if ((page >= 0x08) && (page <= 0x0F))
{
SpanByte toSend = new byte[2] { (byte)UltralightCommand.Read16Bytes, 2 };
SpanByte dataOut = new byte[16];
_rfid.Transceive(Target, toSend, dataOut);
return (dataOut[3] & (0b0000_0001 << (page - 8))) == (0b0000_0001 << (page - 8));
}
else
{
SpanByte toSend = new byte[2] { (byte)UltralightCommand.Read16Bytes, 0x28 };
SpanByte dataOut = new byte[16];
switch (UltralightCardType)
{
case UltralightCardType.UltralightNtag203:
// Read 0x24
toSend[1] = 0x24;
_rfid.Transceive(Target, toSend, dataOut);
// byte 0, 1 and 2 are used , 2 pages lock with specific cases
if ((page >= 16) && (page <= 31))
{
var inc = (page - 16) / 2;
return (dataOut[0] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
else if ((page >= 32) && (page <= 35))
{
var inc = (page - 32) / 2;
return (dataOut[1] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
return true;
case UltralightCardType.UltralightNtag213:
case UltralightCardType.UltralightNtag213F:
case UltralightCardType.UltralightNtag212:
// Read 0x28
_rfid.Transceive(Target, toSend, dataOut);
// byte 0, 1 and 2 are used , 2 pages lock with specific cases
if ((page >= 16) && (page <= 31))
{
var inc = (page - 16) / 2;
return (dataOut[0] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
else if ((page >= 32) && (page <= 39))
{
var inc = (page - 32) / 2;
return (dataOut[1] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
return true;
case UltralightCardType.UltralightNtag215:
// Read 0x82
toSend[1] = 0x82;
_rfid.Transceive(Target, toSend, dataOut);
// byte 0 and 16 pages blocks
if ((page >= 16) && (page <= 129))
{
var inc = (page - 16) / 16;
return (dataOut[0] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
return true;
case UltralightCardType.UltralightNtag216:
case UltralightCardType.UltralightNtag216F:
case UltralightCardType.UltralightNtagI2cNT3H1101:
case UltralightCardType.UltralightNtagI2cNT3H1101W0:
// Read 0xE2
toSend[1] = 0xE2;
_rfid.Transceive(Target, toSend, dataOut);
// byte 0 and 1 for 16 pages blocks
if ((page >= 16) && (page <= 143))
{
var inc = (page - 16) / 16;
return (dataOut[0] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
else if ((page >= 144) && (page <= 225))
{
var inc = (page - 144) / 16;
return (dataOut[1] & (0b0000_0001 << inc)) == (0b0000_0001 << inc);
}
return true;
case UltralightCardType.Unknown:
default:
// safe side...
return true;
}
}
}
/// <summary>
/// Get the number of blocks for a specific sector
/// </summary>
public int NumberBlocks => UltralightCardType switch
{
UltralightCardType.UltralightNtag210 => 16,
UltralightCardType.UltralightNtag212 => 45,
UltralightCardType.UltralightNtag213 => 45,
UltralightCardType.UltralightNtag213F => 45,
UltralightCardType.UltralightNtag215 => 135,
UltralightCardType.UltralightNtag216 => 231,
UltralightCardType.UltralightNtag216F => 231,
UltralightCardType.UltralightEV1MF0UL1101 => 20,
UltralightCardType.UltralightEV1MF0ULH1101 => 20,
UltralightCardType.UltralightEV1MF0UL2101 => 41,
UltralightCardType.UltralightEV1MF0ULH2101 => 41,
UltralightCardType.UltralightNtagI2cNT3H1101 => 231,
UltralightCardType.UltralightNtagI2cNT3H1101W0 => 231,
UltralightCardType.UltralightNtagI2cNT3H2111W0 => 476 + 9,
UltralightCardType.UltralightNtagI2cNT3H2101 => 476 + 9,
UltralightCardType.UltralightNtagI2cNT3H1201W0 => 476 + 9,
UltralightCardType.UltralightNtagI2cNT3H2211W0 => 255 * 4,
UltralightCardType.UltralightC => 36,
UltralightCardType.UltralightNtag203 => 41,
UltralightCardType.MifareUltralight => 48,
_ or UltralightCardType.Unknown => 0,
};
/// <summary>
/// Select the card. Needed if authentication or read/write failed
/// </summary>
/// <returns>True if success</returns>
public bool ReselectCard()
{
return _rfid.ReselectTarget(Target);
}
/// <summary>
/// Write an NDEF Message
/// </summary>
/// <param name="message">The NDEF Message to write</param>
/// <returns>True if success</returns>
public bool WriteNdefMessage(NdefMessage message)
{
const int BlockSize = 4;
// We need to add 0x03 then the length on 1 or 2 bytes then the trailer 0xFE
int messageLengthBytes = message.Length > 254 ? 3 : 1;
if (messageLengthBytes > NdefCapacity)
{
return false;
}
SpanByte serializedMessage = new byte[message.Length + 2 + messageLengthBytes];
message.Serialize(serializedMessage.Slice(1 + messageLengthBytes));
serializedMessage[0] = 0x03;
if (messageLengthBytes == 1)
{
serializedMessage[1] = (byte)message.Length;
}
else
{
serializedMessage[1] = 0xFF;
serializedMessage[2] = (byte)((message.Length >> 8) & 0xFF);
serializedMessage[3] = (byte)(message.Length & 0xFF);
}
serializedMessage[serializedMessage.Length - 1] = 0xFE;
// Blocks are 4 bytes
int nbBlocks = serializedMessage.Length / BlockSize + (serializedMessage.Length % BlockSize > 0 ? 1 : 0);
int inc = 4;
for (int block = 0; block < nbBlocks; block++)
{
BlockNumber = (byte)(inc + block); // Safe cast, never higher than 255
Command = UltralightCommand.Write4Bytes;
if (block * BlockSize + BlockSize <= serializedMessage.Length)
{
Data = serializedMessage.Slice(block * BlockSize, BlockSize).ToArray();
}
else
{
Data = new byte[BlockSize];
serializedMessage.Slice(block * BlockSize).CopyTo(Data);
}
var res = RunUltralightCommand();
if (res < 0)
{
return false;
}
}
return true;
}
/// <summary>
/// Check if the card formated to NDEF
/// </summary>
/// <returns>True if NDEF formated</returns>
/// <remarks>It will only check the first 2 block of the first sector and that the GPB is set properly</remarks>
public bool IsFormattedNdef()
{
BlockNumber = 3;
Command = UltralightCommand.Read16Bytes;
var res = RunUltralightCommand();
if (res < 0)
{
return false;
}
if ((Data![0] != 0xE1) || (Data[1] != 0x10))
{
return false;
}
if ((Data[4] == 0x01) && (Data[5] == 0x03) && (Data[6] == 0xA0) && (Data[7] == 0x0C))
{
return true;
}
else if ((Data[4] == 0x03))
{
return true;
}
return false;
}
/// <summary>
/// Format the Card to NDEF
/// </summary>
/// <param name="authenticationKey">An authentication key if authentication is required.</param>
/// <returns>True if success</returns>
public bool FormatNdef(SpanByte authenticationKey = default)
{
// NDEF formatting is starting on page 3:
// E1 10 CP 00
// 03 00 FE 00
// Early NTAG should be formated a bit differently but this is enough
// CP = NdefCapacity / 8
if (authenticationKey.Length > 0)
{
var authOK = ProcessAuthentication(authenticationKey);
if (!authOK)
{
return false;
}
}
// Block 3 can only be bitwise modified
// Once the logic is set to 1, it cannot be set back to 0
// So read it first and check if the E1 and 10 are correct and skip the write
// If it is.
BlockNumber = 3;
Command = UltralightCommand.Read16Bytes;
var res = RunUltralightCommand();
if (res > 0)
{
if ((Data![0] != 0xE1) || (Data[1] != 0x10))
{
Command = UltralightCommand.Write4Bytes;
Data = new byte[4] { 0xE1, 0x10, (byte)(NdefCapacity / 8), 0x00 };
res = RunUltralightCommand();
if (res <= 0)
{
return false;
}
}
}
else
{
return false;
}
BlockNumber++;
Data![0] = 0x03; // NDEF start marker
Data[1] = 0x00; // Length of message
Data[2] = 0xFE; // NDEF end marker
Data[3] = 0x00; // Empty
res = RunUltralightCommand();
if (res <= 0)
{
return false;
}
return true;
}
/// <summary>
/// Try to read a NDEF Message from a Mifare card
/// </summary>
/// <param name="message">The NDEF message</param>
/// <returns>True if success</returns>
public bool TryReadNdefMessage(out NdefMessage message)
{
const int BlockSize = 16;
message = new NdefMessage();
// Read page 4
BlockNumber = 4;
Command = UltralightCommand.Read16Bytes;
var res = RunUltralightCommand();
if (res <= 0)
{
return false;
}
// Check if it's the old formating and skip it
// 01:03:A0:0C
int slice = 0;
if ((Data![0] == 0x01) && (Data[1] == 0x03) && (Data[2] == 0xA0) && (Data[3] == 0x0C))
{
slice = 4;
}
var doublet = NdefMessage.GetStartSizeNdef(new SpanByte(Data, slice, Data.Length - slice));
int start = doublet.Start;
int size = doublet.Size;
if ((start < 0) || (size < 0))
{
return false;
}
// calculate the size to read
int blocksToRead = (size + start) / BlockSize + ((size + start) % BlockSize != 0 ? 1 : 0);
// We would have to read more available data than the capacity
if ((NdefCapacity + 12) <= blocksToRead * BlockSize)
{
return false;
}
SpanByte card = new byte[(blocksToRead + slice / 4) * BlockSize];
new SpanByte(Data, slice, Data.Length - slice).CopyTo(card);
byte idxCard = 1;
// Decrease by 1 block if we skip first page
int block = 8;
while (idxCard < (blocksToRead + slice / 4))
{
BlockNumber = (byte)block; // Safe cast as never more than 255
Command = UltralightCommand.Read16Bytes;
res = RunUltralightCommand();
if (res <= 0)
{
return false;
}
new SpanByte(Data).CopyTo(card.Slice(idxCard * BlockSize - slice));
idxCard++;
// Here, we read 4 blocks of 4, so 16 blocks
block += 4;
}
var ndef = NdefMessage.ExtractMessage(card);
try
{
message = new NdefMessage(ndef);
}
catch (Exception)
{
// Catching all exceptions as quite a lot can happen
// This is checking if a message is valid or not
return false;
}
return true;
}
/// <summary>
/// Process authentication
/// </summary>
/// <param name="authenticationKkey">An authentication key</param>
/// <returns>True if success</returns>
/// <remarks>Depending on the type of authentication, the process will be done transparently</remarks>
public bool ProcessAuthentication(SpanByte authenticationKkey)
{
if (UltralightCardType == UltralightCardType.UltralightC)
{
// Not yet implemented, need to implement with 3DS
throw new NotImplementedException();
}
if (authenticationKkey.Length != 4)
{
throw new ArgumentException($"Password can only be 4 bytes long");
}
AuthenticationKey = authenticationKkey.ToArray();
Command = UltralightCommand.PasswordAuthentication;
var res = RunUltralightCommand();
if (res < 0)
{
return false;
}
_pack = new byte[2];
Data!.CopyTo(_pack, 0);
return true;
}
/// <summary>
/// Get the counter value
/// </summary>
/// <param name="counter">A valid counter value, can vary depending on the card. 0xFF will ignore the value and use the one set in Counter</param>
/// <returns>The counter value or -1 if any error</returns>
public int GetCounter(byte counter = 0xFF)
{
Command = UltralightCommand.ReadCounter;
Counter = counter != 0xFF ? counter : Counter;
var res = RunUltralightCommand();
if (res < 0)
{
return -1;
}
return Data![0] + (Data[1] << 8) + (Data[2] << 16);
}
/// <summary>
/// Increase a counter by a specified amount
/// </summary>
/// <param name="counter">A valid counter value, can vary depending on the card. 0xFF will ignore the value and use the one set in Counter</param>
/// <param name="increment">The amount to increment the counter. If negative, it will use the value of Data</param>
/// <returns>True if success</returns>
public bool IncreaseCounter(byte counter = 0xFF, int increment = -1)
{
Command = UltralightCommand.IncreaseCounter;
Counter = counter != 0xFF ? counter : Counter;
if (increment >= 0)
{
Data = new byte[4];
BinaryPrimitives.WriteInt32LittleEndian(Data, increment);
}
var ret = RunUltralightCommand();
return ret >= 0;
}
/// <summary>
/// Perform a write using the 16 bytes present in Data on a specific block
/// </summary>
/// <param name="block">The block number to write</param>
/// <returns>True if success</returns>
/// <remarks>You will need to be authenticated properly before</remarks>
public bool WriteDataBlock(byte block)
{
if (_pack == null)
{
var authOK = ProcessAuthentication(AuthenticationKey);
if (!authOK)
{
return false;
}
}
BlockNumber = block;
Command = UltralightCommand.Write4Bytes;
var ret = RunUltralightCommand();
return ret >= 0;
}
/// <summary>
/// Get the chip signature
/// </summary>
/// <returns>The signature or an empty array</returns>
public byte[] GetSignature()
{
Command = UltralightCommand.ReadSignature;
var res = RunUltralightCommand();
if (res > 0)
{
return Data!;
}
return new byte[0];
}
/// <summary>
/// Try to get the configuration
/// </summary>
/// <param name="configuration">The detailed configuration</param>
/// <returns></returns>
public bool TryGetConfiguration(out Configuration configuration)
{
configuration = new();
// Read the last 4 blocks
BlockNumber = (byte)(NumberBlocks - 4); // Safe cast as never more than 255
if (UltralightCardType is UltralightCardType.UltralightNtagI2cNT3H1101 or UltralightCardType.UltralightNtagI2cNT3H1101W0 or UltralightCardType.UltralightNtagI2cNT3H2111W0
or UltralightCardType.UltralightNtagI2cNT3H2101 or UltralightCardType.UltralightNtagI2cNT3H1201W0 or UltralightCardType.UltralightNtagI2cNT3H2211W0)
{
BlockNumber--;
}
else if (UltralightCardType is UltralightCardType.UltralightC)
{
// There is no configuration for this card
return false;
}
Command = UltralightCommand.Read16Bytes;
var res = RunUltralightCommand();
if (res < 0)
{
return false;
}
configuration.Mirror.MirrorType = (MirrorType)(Data![0] >> 6);
configuration.Mirror.Position = (byte)((Data[0] >> 4) & 0b0000_0011);
configuration.IsStrongModulation = ((Data[0] >> 2) & 1) == 1;
configuration.Mirror.Page = Data[2];
configuration.Authentication.AuthenticationPageRequirement = Data[3];
configuration.Authentication.IsReadWriteAuthenticationRequired = ((Data[4] >> 7) & 1) == 1;
configuration.Authentication.IsWritingLocked = ((Data[4] >> 6) & 1) == 1;
configuration.IsSleepEnabled = ((Data[0] >> 3) & 1) == 1;
configuration.FieldDetectPin = (FieldDetectPin)(Data[0] & 0b0000_0011);
configuration.NfcCounter.IsEnabled = ((Data[4] >> 4) & 1) == 1;
configuration.NfcCounter.IsPasswordProtected = ((Data[4] >> 3) & 1) == 1;
configuration.Authentication.MaximumNumberOfPossibleTries = (byte)(Data[4] & 0b0000_0111);
return true;
}
/// <summary>
/// Write the configuration
/// </summary>
/// <param name="configuration">The configuration to write</param>
/// <returns>True if success</returns>
/// <remarks>An authentication has to happen and will use the credentials stored</remarks>
public bool WriteConfiguration(Configuration configuration)
{
if (UltralightCardType is UltralightCardType.UltralightC)
{
// There is no configuration for this card
return false;
}
var res = ProcessAuthentication(AuthenticationKey);
if (!res)
{
return false;
}
var serialized = configuration.Serialize();
BlockNumber = (byte)(NumberBlocks - 4);
if (UltralightCardType is UltralightCardType.UltralightNtagI2cNT3H1101 or UltralightCardType.UltralightNtagI2cNT3H1101W0 or UltralightCardType.UltralightNtagI2cNT3H2111W0
or UltralightCardType.UltralightNtagI2cNT3H2101 or UltralightCardType.UltralightNtagI2cNT3H1201W0 or UltralightCardType.UltralightNtagI2cNT3H2211W0)
{
// Those are using different configurations, Configuration registers and session registers
BlockNumber--;
}
Data = new byte[4];
new SpanByte(serialized, 0, 4).CopyTo(Data);
Command = UltralightCommand.Write4Bytes;
var ret = RunUltralightCommand();
if (ret < 0)
{
return false;
}
BlockNumber++;
new SpanByte(serialized, 4, 4).CopyTo(Data);
Command = UltralightCommand.Write4Bytes;
ret = RunUltralightCommand();
if (ret < 0)
{
return false;
}
return true;
}
/// <summary>
/// Set the password, the AuthenticationKey is used as the old password
/// </summary>
/// <param name="newAuthenticationKkey">The new authentication key</param>
/// <returns>True if success</returns>
public bool SetPassword(SpanByte newAuthenticationKkey)
{
if (_pack == null)
{
var res = ProcessAuthentication(AuthenticationKey);
if (!res)
{
return false;
}
}
BlockNumber = (byte)(NumberBlocks - 4); // Safe cast as never more than 255
if (UltralightCardType is UltralightCardType.UltralightNtagI2cNT3H1101 or UltralightCardType.UltralightNtagI2cNT3H1101W0 or UltralightCardType.UltralightNtagI2cNT3H2111W0
or UltralightCardType.UltralightNtagI2cNT3H2101 or UltralightCardType.UltralightNtagI2cNT3H1201W0 or UltralightCardType.UltralightNtagI2cNT3H2211W0)
{
BlockNumber--;
}
else if (UltralightCardType is UltralightCardType.UltralightC)
{
// Not implemented, this require special operations
throw new NotImplementedException();
}
if (newAuthenticationKkey.Length != 4)
{
throw new ArgumentException($"Password can only be 4 bytes long");
}
Data = newAuthenticationKkey.ToArray();
Command = UltralightCommand.Write4Bytes;
var ret = RunUltralightCommand();
if (ret < 0)
{
return false;
}
return ProcessAuthentication(newAuthenticationKkey);
}
private byte[] Serialize()
{
byte[]? ser = null;
switch (Command)
{
case UltralightCommand.GetVersion:
ser = new byte[1] { (byte)Command };
break;
case UltralightCommand.Read16Bytes:
ser = new byte[2] { (byte)Command, BlockNumber };
break;
case UltralightCommand.ReadFast:
// We're using the current block as start block and _endAddress as end block
ser = new byte[3] { (byte)Command, BlockNumber, _endAddress };
break;
case UltralightCommand.WriteCompatible:
case UltralightCommand.Write4Bytes:
if (Data is null)
{
throw new ArgumentException($"Card is not configured for writing.");
}
ser = new byte[2 + Data.Length];
ser[0] = (byte)Command;
ser[1] = BlockNumber;
if (Data.Length > 0)
{
Data.CopyTo(ser, 2);
}
break;
case UltralightCommand.ReadCounter:
ser = new byte[2] { (byte)Command, Counter };
break;
case UltralightCommand.IncreaseCounter:
if (Data is null)
{
throw new ArgumentException($"Card is not configured for counter increase.");
}
ser = new byte[6];
ser[0] = (byte)Command;