com.nxp.nfclib.exceptions.InvalidResponseLengthException: Authentication Error

[Nitheesh ks]

Dear Team,

sub : com.nxp.nfclib.exceptions.InvalidResponseLengthException: Authentication Error

We have one device in which SAM Card can be inserted, while trying to authenticate the NFC tag , its getting Authentication Error.

We followed the sample from :
http://maven.taplinx.nxp.com/nexus/content/repositories/taplinxfiles/SampleAppSources/srcsamplenxpnfclib/1.5/

Things we have done :-
- Initialized the key :

infoProvider.setKey(ALIAS_KEY_2KTDES, SampleAppKeys.EnumKeyType.EnumDESKey,
SampleAppKeys.AUTH_KEY);


public static final byte[] AUTH_KEY = {(byte) 0x00, (byte) 0x01,
(byte) 0x02, (byte) 0x03, (byte) 0x04, (byte) 0x05,
(byte) 0x06, (byte) 0x07, (byte) 0x08, (byte) 0x09,
(byte) 0x10, (byte) 0xAA, (byte) 0xBB, (byte) 0xCC,
(byte) 0xDD, (byte) 0xEE
};


We gave the DAK Key of the SAM Card for authentication like below.But getting "com.nxp.nfclib.exceptions.InvalidResponseLengthException: Authentication Error" exception.

desFireEV2.authenticate(0, IDESFireEV1.AuthType.Native, KeyType.THREEDES,objKEY_2KTDES);


Please guide if our approach is wrong.

Thanks & Regards,
Nitheesh ks

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[TapLinx Support]

Hi Nitheesh,

Please let us split the problem. The authentication can be done with a local key. If it really comes from a SAM is a different matter. Using DES keys bear always the issue of invalid keys. For instance, 00…00 is an invalid 2K3DES key, because the 8 upper bytes are equal to the 8 lower bytes. The DESFire comes with DES keys as default, but you should always change the cipher to AES for your application.

We have a lot of examples where we show the authentication and the change of keys for a MIFARE DESFire:

DESFire EV1 authenticate with different keys for reading and writing:

DESFire EV1 change key:

DESFire EV2 Read/write encrypted file:

DESFire EV1 Create app and file with 2K3DES cipher:

The TapLinx team

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[Nitheesh ks]

Thanks for the reply.

Let us workout with the above information.

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