send buffer directly to a smartcard

Rudy Barbieri :

I need to send a message to a smartcard. First of all, I sent it using gpshell in order to test the correctness and get an answer:

send_apdu_nostop -sc 0 -APDU 802A80B05F87410061DA7A1E2F02602A255063713FD657797063C6C7ACC12072F5340B1C0126A616BC66C65F49132EED10AE071DC661AA1333BEA92F67A5BEFFDFA7A0F31FC8B3D981105D1EF96B000FD90098C7FF031906A1018E0897C5DA580059AD2900                             Command --> 802A80B05F87410061DA7A1E2F02602A255063713FD657797063C6C7ACC12072F5340B1C0126A616BC66C65F49132EED10AE071DC661AA1333BEA92F67A5BEFFDFA7A0F31FC8B3D981105D1EF96B000FD90098C7FF031906A1018E0897C5DA580059AD2900
Wrapped command --> 802A80B05F87410061DA7A1E2F02602A255063713FD657797063C6C7ACC12072F5340B1C0126A616BC66C65F49132EED10AE071DC661AA1333BEA92F67A5BEFFDFA7A0F31FC8B3D981105D1EF96B000FD90098C7FF031906A1018E0897C5DA580059AD2900
Response <-- 604001544F50434F4E31392020202020000000FF00FF0000FF00020000000000000000FF5D11DCAD000000005D11DCAD005D1EF96B9000

With this result I was confident to replicate the behaviour in java using smartcardio. The following is the code I wrote:

    void testCard()
    {
        TerminalFactory factory = TerminalFactory.getDefault();
        List<CardTerminal> terminals;
        try {
            terminals = factory.terminals().list();
        } catch (CardException ex) {
            return;
        }
        CardTerminal cardTerm = terminals.get(0);
        Card card;
        try {
            card = cardTerm.connect("T=0");
        } catch (CardException ex) {           
            return;
        }
        CardChannel cach = card.getBasicChannel();
        ResponseAPDU r;
        try {
            CommandAPDU ca = new CommandAPDU(new byte[]{(byte)0x80,(byte)0x2A,(byte)0x80,(byte)0xB0,(byte)0x5F,(byte)0x87,(byte)0x41,(byte)0x00,(byte)0x61,(byte)0xDA,(byte)0x7A,(byte)0x1E,(byte)0x2F,(byte)0x02,(byte)0x60,(byte)0x2A,(byte)0x25,(byte)0x50,(byte)0x63,(byte)0x71,(byte)0x3F,(byte)0xD6,(byte)0x57,(byte)0x79,(byte)0x70,(byte)0x63,(byte)0xC6,(byte)0xC7,(byte)0xAC,(byte)0xC1,(byte)0x20,(byte)0x72,(byte)0xF5,(byte)0x34,(byte)0x0B,(byte)0x1C,(byte)0x01,(byte)0x26,(byte)0xA6,(byte)0x16,(byte)0xBC,(byte)0x66,(byte)0xC6,(byte)0x5F,(byte)0x49,(byte)0x13,(byte)0x2E,(byte)0xED,(byte)0x10,(byte)0xAE,(byte)0x07,(byte)0x1D,(byte)0xC6,(byte)0x61,(byte)0xAA,(byte)0x13,(byte)0x33,(byte)0xBE,(byte)0xA9,(byte)0x2F,(byte)0x67,(byte)0xA5,(byte)0xBE,(byte)0xFF,(byte)0xDF,(byte)0xA7,(byte)0xA0,(byte)0xF3,(byte)0x1F,(byte)0xC8,(byte)0xB3,(byte)0xD9,(byte)0x81,(byte)0x10,(byte)0x5D,(byte)0x1E,(byte)0xF9,(byte)0x6B,(byte)0x00,(byte)0x0F,(byte)0xD9,(byte)0x00,(byte)0x98,(byte)0xC7,(byte)0xFF,(byte)0x03,(byte)0x19,(byte)0x06,(byte)0xA1,(byte)0x01,(byte)0x8E,(byte)0x08,(byte)0x97,(byte)0xC5,(byte)0xDA,(byte)0x58,(byte)0x00,(byte)0x59,(byte)0xAD,(byte)0x29,(byte)0x00});   
            r = cach.transmit(ca);           
        } catch (CardException ex) {            
            return;
        }
    }        

When the code runs I always get the error 0x6E00 which means: "Class not supported".

Reading the javadoc of transmit I understand that "The CLA byte of the command APDU is automatically adjusted to match the channel number of this CardChannel."

I suspect that for some reasons the class byte was changed somehow and for that reason the card answers with the error.

Is there any way to send directly the message to the card in java?

Rudy Barbieri :

I found the solution. It seems that using "T=0" is not a suitable way to send the second command. Using "T=1" or "*" solve the problem. The correction is the following:

card = cardTerm.connect("T=1");