问题
I'm trying to send a command to a smart card. I use a Gemalto IDBridge CT30 (PC TWIN reader) and a IDBridge K30 connected to the Android device over USB.
I try to send a SELECT APDU command over USB:
boolean claim = openedConnection.claimInterface(usbInterface, true);
byte[] data = new byte[]{
(byte) 0x00, (byte) 0xA4, (byte) 0x04, (byte) 0x0C,
(byte) 0x07, (byte) 0xA0, (byte) 0x00, (byte) 0x00,
(byte) 0x01, (byte) 0x18, (byte) 0x45, (byte) 0x4E};
After that I receive an answer:
final int dataTransferred = this.openedConnection.bulkTransfer(endPointOut, data, data.length, TIMEOUT_MS);
if(!(dataTransferred == 0 || dataTransferred == data.length)) {
throw new Exception("Error durring sending command [" + dataTransferred + " ; " + data.length + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
final byte[] responseBuffer = new byte[endPointIn.getMaxPacketSize()];
final int dataTransferred = this.openedConnection.bulkTransfer(this.endPointIn, responseBuffer, responseBuffer.length, TIMEOUT_MS);
Console.writeLine("USB Retrieve: " + dataTransferred + " " + responseBuffer.length);
if(dataTransferred >= 0){
return responseBuffer;
}
throw new Exception("Error durring receinving response [" + dataTransferred + "]");
That answer is
0x00 0x00 0x00 0x00 0x00 0xA0 0x00 0x41 0x03 0x00
However, I should get an answer of 0x90 0x00 according to the test project here.
What am I doing wrong? Can anybody help me? Do I use the correct approach? I'm not using the default package classes of javax.smartcardio. I use the USB interface classes (e.g. UsbDevice) directly.
回答1:
Your reader device speaks CCID over the USB interface. You cannot simply send an APDU (smartcard command) over the bulk-out endpoint and expect to receive a response APDU over the bulk-in endpoint. Instead you need to implement the CCID device class protocol (see USB Device Class Specifications). The steps are something like:
- Send PC_to_RDR_IccPowerOn command to activate the card.
62 00000000 00 00 00 0000 | | | | | | | | | | | | | \--> Empty data field | | | | | \-------> Unused, set to 0x0000 | | | | \----------> Power select: 0x00 indicates automatic selection | | | \-------------> Sequence number (increment for each command) | | \----------------> Slot number (seems to be zero for your device) | \-------------------------> Length of data field (LSB first) \----------------------------> Message type: 0x62 indicates PC_to_RDR_IccPowerOn
- Receive the ATR through RDR_to_PC_DataBlock.
80 18000000 00 00 00 00 00 3BBF11008131FE45455041000000000000000000000000F1 | | | | | | | | | | | | | | | \--> Data field: ATR | | | | | | \-----> Level parameter | | | | | \--------> Error register (should be zero on success) | | | | \-----------> Status register (should be zero on success) | | | \--------------> Sequence number (matches the sequence number of the command) | | \-----------------> Slot number (matches the slot number of the command) | \--------------------------> Length of data field (LSB first) \-----------------------------> Message type: 0x80 indicates RDR_to_PC_DataBlock
- Send command APDU wrapped into PC_to_RDR_XfrBlock command
6F 0C000000 00 01 00 0000 00A4040C07A000000118454E | | | | | | | | | | | | | \--> Data field: Command APDU | | | | | \-------> Level parameter (0x0000 for normal length APDUs) | | | | \----------> Block waiting timeout | | | \-------------> Sequence number (increment for each command) | | \----------------> Slot number (seems to be zero for your device) | \-------------------------> Length of data field (LSB first) \----------------------------> Message type: 0x6F indicates PC_to_RDR_XfrBlock
- Receive response APDU through RDR_to_PC_DataBlock.
80 02000000 00 01 00 00 00 9000 | | | | | | | | | | | | | | | \--> Data field: Response APDU | | | | | | \-----> Level parameter | | | | | \--------> Error register (should be zero on success) | | | | \-----------> Status register (should be zero on success) | | | \--------------> Sequence number (matches the sequence number of the command) | | \-----------------> Slot number (matches the slot number of the command) | \--------------------------> Length of data field (LSB first) \-----------------------------> Message type: 0x80 indicates RDR_to_PC_DataBlock
- Repeat steps 3 and 4 for each APDU exchange (don't forget to increment the sequence number).
Since the ATR indicates T=1 as first protocol, you might need to wrap your APDU into T=1 TPDUs (depending on the reader configuration). The I-block for the first APDU would look something like:
00 00 0C 00A4040C07A000000118454E 15 | | | | | | | | | \--> LRC (due to missing TC in ATR): XOR checksum over all other bytes | | | \---------------------------> INF: APDU | | \------------------------------> LEN: length of INF field | \---------------------------------> PCB: toggle between 0x00 and 0x40 for every other I-block \------------------------------------> NAD: node addressing
So your PC_to_RDR_XfrBlock command would look like:
6F 10000000 00 01 00 0000 00 00 0C 00A4040C07A000000118454E 15
You would then either receive your answer wrapped in an I-block or an R- or S-block indicating that some special/error treatment is necessary.
回答2:
What you send is a SELECT command, with a given AID, which easily could produce a result. You clearly indicate, however, that you are not interested in a response, by
- setting P2 to '0C'
- not providing an LE byte (assuming a block based protocol, surely reasonable for USB)
So one may conclude, that your card is not compliant to ISO 7816-4; on the other hand, the response does not contain anything looking like an error SW1/SW2 status either, are you sure, to have responsebuffer dumped?
来源：https://stackoverflow.com/questions/40975868/communicate-with-smartcard-reader-through-android-usb-host