setkey question

[Jordi]

I read at documentation:

ks.setKey(0, (byte) 0, IKeyConstants.KeyType.KEYSTORE_KEY_TYPE_MIFARE, KEY_DEFAULT_1, (byte) 0);

But what is KEY_DEFAULT_1?

And why the method setKey(int, byte, IKeyConstants.KeyType, byte[]) in the type IKeyStore is not applicable for the arguments (int, byte, IKeyConstants.KeyType, byte[], byte); ??

The method has 5 parameters not 4, i'm using :

import com.nxp.nfclib.Interface.NxpNfcLib;

For the Advanced library.

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[David92]

For the Advanced library you use only 4 parameters:

(int, byte KeyVersion, KeyType, newKey)

The KEY_DEFAULT_1 is probably the new Key, which can be whatever you come up with (I think it is 6 bytes long in my case).
You can set up more KEYs in KeyStore, and different Types. I use in my case MIFARE type Key, it's easiest but probably not the most secured.
Later, you will authenticate using one of those keys, reffering to them with the integer (keyNumber), which you also enter here as one of the parameters.

Just put for example:

byte[] KEY_DEFAULT_1 = {(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF};

And it should work.

Best,
David

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[Jordi]

Thank you, ¿ is there any example about Desfire ?

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[David92]

If by example, you mean an Example DESFire application - yes there exists a Sample App which you get for free together with the LITE SDK.
It should be inside the folder where you downloaded your LITE SDK (Sample Apps folder).
Look into that one in

MainActivity.java

and check for

desfireCardLogic

method inside it. There you can find several use-cases that you can do with Desfire on LITE SDK.

Best,
David

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