Reply To: Trying to read DESFire EV1 Card, requires Authentication.

[Michael Limb]

Hi there,

Yes, I'm sure that the file exists. To make sure, using the selectApplication call with my array of appIds returned, I called idesFireEV1.getFileIDs(), and got the attached results back (file_ids.png). Here's a code snippet of that area:

// Grab instance of DESFire EV1 interface

                IDESFireEV1 idesFireEV1 = nfcScanEvent.getIdesFireEV1();



                // Try to connect to card.

                idesFireEV1.getReader().connect();



                // Get all application IDs on the card

                int[] appIdArray = idesFireEV1.getApplicationIDs();



                // Make sure we received at least one

                if (appIdArray.length > 0) {

                    // Select the first app id, since the TriMet cards should only have one.

                    idesFireEV1.selectApplication(appIdArray[0]);



                    // Grab file ids

                    byte[] fileIDs = idesFireEV1.getFileIDs();

                }

It is crucial that we read this second file, and the method call returns two file IDs. I also requested verified cards that they have been able to read both files on from the manufacturer, so I can confirm that there are no issues with the card's data.

Any ideas would be greatly appreciated, as this is causing our development to come to a grinding halt.

Thanks,
Michael

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