1645955_en-US

[#1]

Pax device APDU NFC & Mifare Ultralight C

Hello,

I'm developing on Pax device and I want to manage Mifare ULTRALIGHT C (MF0ICU2)

Pax devices use a custom PayDroid OS and not a standard android, consequently, I don't have NFC android libraries. 

I need to install something call NeptuneLiteAPI that expose IPCC via a library.

First, I'm a little bit lost with naming convention & standard. Api is speaking about :

• ISO14443
  • A or B
  • 1,2 or 3
• M1 card

Normally, Ultralight C is 14443 Type A, but I can't read my card with this option, I succeed to read with "M1 Card" option. What is a M1 card ? it it Classic 1k?

Documentation mention that I need to use APDU and expose some command to execute this kind of call

I succeed to read and write the card (with M1 function), the library expose default read/write method that use compatibility mode compatible with my card

Now, i'm trying to configure authentication and to send some command to the chip, via the APDU command.

Here is a simplication of the code I can use

iPicc = getDal().getPicc(piccType);

iPicc.open();
while(){
PiccCardInfo cardInfo = iPicc.detect(EDetectMode.ONLY_M);

if(cardInfo!=null){

//Read : works

byte[] page0=iPicc.m1Read((byte) 0);

// Write : works

iPicc.m1Write((byte)(13),hexStringToByteArray("AAAAAAAA000000000000000000000000"));

}

For writing, i have 3 methods:

• byte[] :  isoCommand(byte cid, byte[] send)
• ApduRespInfo : isoCommandByApdu(byte cid, ApduSendInfo apduSendInfo)
• byte[] cmdExchange(byte[] dataIn, int recvLen)
• All these method ask for an APDU command.

if I understood well, Mifare Ultralight C does't respect APDU but APDU is the only way?

And on some website, I found that using instruction class "FF", I can sent direct instruction to chip.
But I'm lost in the command I need to send, and I try several.
I have the error (unfortunatly, they are the one NeptuneLiteAPi and not a standard one).

• No specific card in sensing area, or card is not activated PICC#3(not search card error)
• PICC#97(unexpected error)

But it's strange, I well detect the card just before and succeed to read/write, so the card is well "connected"

I tried several commands (direct instruction, APDU instruction, CRC computation), nothing works.

 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("30")); // PICC#97(unexpected error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("3004")); // PICC#97(unexpected error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("3000")); // PICC#97(unexpected error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("3000A802"));  // Avec CRC  => No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("300002A8"));  // Avec CRC inversé =>  No specific card in sensing area, or card is not activated PICC#3(not search card error)

 //byte[] cmd2 = iPicc.cmdExchange(CryptageUtils.hexStringToByteArray("3000A802"),17); // Card is not activated. PICC#3(not search card error)
// byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("30000000"));  // No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("ff300000"));  // No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("ff30000F"));  // No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("FFCA00000004")); // No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("3000000004")); // No specific card in sensing area, or card is not activated PICC#3(not search card error)
 //byte[] cmd2 = iPicc.isoCommand(cardInfo.getCID(), CryptageUtils.hexStringToByteArray("3001")); // No specific card in sensing area, or card is not activated PICC#3(not search card error)

 If anyone can well me or put me on the right way, I would really appreciate.

Regards.

Re: Pax device APDU NFC & Mifare Ultralight C

Hello @thibaut @Antoine1 @Erableto,

did you ever find a solution to this issue? I stumbled upon the same problem: I cannot read counters on a Mifare Ultralight EV1; I tried with cmdExchange mainly, but also with all other methods provided by NeptuneLite library, but I always get errors like PICC#3 or #97.

Re: Pax device APDU NFC & Mifare Ultralight C

Hello @thibaut and @Erableto,

did you find the answer to your question?
Because we have the same problem on our side.

Regards.

Re: Pax device APDU NFC & Mifare Ultralight C

Hi Thibaut. Did you figure it out? I'm doing the same as you but with a Mifare Classic 1k and I have the same problems. I'm looking for help too.

I will keep you posted with any progress I manage to make. I hope we can get this done together.

Regards.