CODEWITHSUNDEEP
androidnfccredit-card
romaneso
romaneso

Reputation: 1122

How to get additional card data from IsoDep?

I am really a newbie at programming with NFC. I want to access e.g. the Account number on the NFC- Tag on the card. I already found out that the card (PayPass, Visa aso.) is a IsoDep- Tech.

My code so far:

Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
IsoDep isoDep = IsoDep.get(tag);
isoDep.connect();
byte[] result = isoDep.transceive(??????????????????);

I know that if you want to access Data on the card you have to use APDU in the transeceive Method. I am not sure what i have to type.

What do I have to write to access the data on the card?

Upvotes: 1

Views: 2621

Answers (1)

LaurentY
LaurentY

Reputation: 7653

Please have a look at this open-source project:

https://github.com/devnied/EMV-NFC-Paycard-Enrollment

A Java library used to read and extract data from NFC EMV credit cards

I use it for french credit cards and it works well.

UPDATE1

All APDUs are created and managed by the library. You just have to implement interface IProvider: https://github.com/devnied/EMV-NFC-Paycard-Enrollment/blob/master/library/src/main/java/com/github/devnied/emvnfccard/parser/IProvider.java

Here a implementation of IProvider: https://github.com/devnied/EMV-NFC-Paycard-Enrollment/blob/master/sample/src/main/java/com/github/devnied/emvnfccard/provider/Provider.java

IsoDep is sent to Provider class, and in method transceive, APDU are sent:

    /**
     * Tag comm
     */
    private IsoDep mTagCom;

    @Override
    public byte[] transceive(final byte[] pCommand) throws CommunicationException {
        [...]
        byte[] response = null;
        [...]
        // send command to emv card
        response = mTagCom.transceive(pCommand);
        [...]

        return response;
    }

Upvotes: 1

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