Problem authentication Mifare classic

[Jose Lopez]

Hi,

I star to development with Mifare SDK in Android, I use Um10853 to star.

this is the process to manage the card

public void onClassicCardDetected(IMFClassic objMFCCard) {
// TODO Auto-generated method stub
// super.onClassicCardDetected(objMFCCard);
Log.e(TAG, "--------------- onClassicCardDetected --------------");
classic = objMFCCard;
try{
textout += "Card Detected : " + classic.getCardDetails().cardName + "\n";
textout += "Uid :" + Utilities.dumpBytes(classic.getUID()) + "\n";
tv.setText(textout);
classic.getReader().connect();
byte[] key = {(byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF, (byte)0xFF};
classic.authenticateSectorWithKeyB(2, key);
byte[] sc_data = classic.readBlock(4);

when it do authentication throw exception. I know the key is right

please any help is welcome.

---

+ 0  |  - 0

[mifaresdk]

Hi Jose,

Before you try to read content from the MIFARE Classic you should authenticate. For instance the UID resides in block 0 and to read from block 0 you have to authenticate before the access.

Regards,
The MIFARE Team

---

+ 0  |  - 0

[Author]

Posts