Read Binary File, T=1

Hello,
I'm trying to read a binary file from a card.
This is something I can easily do, at least until now :)
I'm testing a new card (with protocol T=1 instead of the T=0 I used so far) and I don't have the card technical document (with the APDUs format) but I guess the APDUs are the same (for the read binary command and other more general commands like the select and others alike).
I can select the pretended files and navigate in the card EFs/DFs, but for some reason I cant read a complete binary file (it stops before the last block reading).
This is the code I have used so far without problems:
private static byte[] readBinary() throws CardException, IOException {
//CardChannel channel = getCardChannel();
ByteArrayOutputStream os = new ByteArrayOutputStream(256);
boolean finished = false;
byte offset = (byte) 0x00;
int i=1;
while (!finished) {
     //Read binary command
     ResponseAPDU resp = channel.transmit(new CommandAPDU(0x00, 0xB0, offset,
               0x00, READ_BUFFER_LENGTH));
     i++;
     byte[] data = resp.getData();
     offset = (byte) (offset + (byte) 0x01);
     os.write(data);
     if (data.length < READ_BUFFER_LENGTH) {
          finished = true;
return os.toByteArray();
}Where READ_BUFFER_LENGTH = 256
If with the other cards I tested this code works fine why doesn't it work with this card? The only difference is at the transport protocol, this card protocol is T=1 and the other cards was T=0, but I thought that PC/SC would hide the transport protocol layer
Thanks for any help
Brian
Edited by: Brian.Rep on Dec 26, 2008 3:16 AM

Brian.Rep wrote:
Hello,
I'm trying to read a binary file from a card.If it is a Java Card, it would help to see source code of the applet.
This is something I can easily do, at least until now :)
I'm testing a new card (with protocol T=1 instead of the T=0 I used so far) and I don't have the card technical document (with the APDUs format) but I guess the APDUs are the same (for the read binary command and other more general commands like the select and others alike).
I can select the pretended files and navigate in the card EFs/DFs, but for some reason I cant read a complete binary file (it stops before the last block reading).
This is the code I have used so far without problems:
Where READ_BUFFER_LENGTH = 256
If with the other cards I tested this code works fine why doesn't it work with this card? The only difference is at the transport protocol, this card protocol is T=1 and the other cards was T=0, but I thought that PC/SC would hide the transport protocol layerThis is not quite true. Java Card tries to hide the underlying protocol used, but it is not quite possible with T=0. You need to know what APDU case you're expecting for CLA/INS in order to pick up the data field or send outgoing data.
What error do you get?

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