Accessing Applets in eSE

Tibet — Sat, 12 Oct 2024 03:28:51 GMT

NFC chip: SN220

Accessing applets in ese always fails.

NfcF -> NO Response.

IsoDep -> 62 82

@Override
public void onTagDiscovered(Tag tag) {
    Log.d(TAG, "onTagDiscovered");
    long startTime = 0;
    boolean success = true;
    NfcF tech = null;
    try {
        if (tag == null) {
            Log.e(TAG, "could not get tag！");
        }
        byte[] tagId = tag.getId();
        String tagIdString = HceUtils.getHexBytes("", tagId);
        Log.d(TAG, "tag id: " + tagIdString);
      tech = NfcF.get(tag);
        tech.connect();
        Log.d(TAG, "Connected.");

        CommandApdu commandApdu = HceUtils.buildSelectApdu(HceUtils.CASD_AID, true);
        Log.d(TAG, "commandApdu: " + commandApdu.getApdu());
        //CASD_AID = "A00000015153504341534400"
        //output: commandApdu: 01A4040010A000000680020000000300000000000100
        byte[] response = tech.transceive(HceUtils.hexStringToBytes(commandApdu.getApdu()));
        Log.d(TAG, "Recv: " + HceUtils.toHexString(response));

    } catch (Exception e) {
        Log.e(TAG, e.toString());
    } finally {
        try {
            if (tech != null) {
                tech.close();
            }
        } catch (Exception e) {
            Log.e(TAG, e.toString());
        }

    }
}

Re: Accessing Applets in eSE

KaiLi — Mon, 14 Oct 2024 06:36:32 GMT

Hello @Tibet

Since SN220 is high security product, which all related design resources are needed NDA, so it's recommanded that you should contact your local FAE for the further support.

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