if the card in question has support for an ISO file structure (MF/DFs), then one can navigate the hierarchy by enumerating the directory elements, and selection DFs and EFs.
Muscle cards dont have ISO file formats. muscle cards have a flat file structure, with a 32bit name. IF we get academic, a muscle card acts more like a persistent store for distributed objects, named within a 32bit field , than a file store backed by eeprom.
I believe that one of the muscle card implementations actually maps the musclecard abstractions onto a ISO card. It probably maps object references (32bits) into an DF/EF combination, beneath the ISO root.
Dave can perhaps indicate if the source code for the oberthur plugin is available, which will show off how one nagivates the ISO file store using the ISO APDUs, to create the muscle card object layer abstraction.
From: Arthur Chiu <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED], MUSCLE <[email protected]> To: MUSCLE <[email protected]> Subject: [Muscle] APDU issues Date: Tue, 13 Sep 2005 15:52:30 -0700 Hi, I am currently trying to read and write to the memory within the smartcard. Please correct me if I am wrong. I first have to select MF, then select DF, then select EF and perform read binary or write binary (for transparency file structure). Now the question is: 1) How do I know the identifier of a DF? From the return code I get from SCardTransmit, I have 90 00, meaning no further qualification. Does this mean that there are no further information? 2) If I were to create a DF or EF, how would I do so? I cant seem to find a command in the ISO 7816-4 documentation. 3) How can I create an EF of different structure? 4) Finally, I have tried the following 2 APDU for selecting the MF and according to ISO 7816-4, I should obtain the same result. However, I did not. The following is the code segment: Version 1: ----------------- sendBuffer = (BYTE*) malloc(10*sizeof(BYTE)); recieveBuffer = (BYTE*)malloc(256*sizeof(BYTE)); memcpy(sendBuffer, "\x00\xA4\x00\x00\x02\x3F\x00",7); dwLength = sizeof(recieveBuffer); rv = SCardTransmit(CardHandle, SCARD_PCI_T0, sendBuffer, 7, &IORequest, recieveBuffer, &dwLength); Version 2: -------------------- sendBuffer = (BYTE*) malloc(10*sizeof(BYTE)); recieveBuffer = (BYTE*)malloc(256*sizeof(BYTE)); memcpy(sendBuffer, "\x00\xA4\x00\x00",4); dwLength = sizeof(recieveBuffer); rv = SCardTransmit(CardHandle, SCARD_PCI_T0, sendBuffer, 4, &IORequest, recieveBuffer, &dwLength); I get 90 00 for version 1 (which i think is correct?) and 67 00 (Wrong Length) for version 2. Why would this be so? Thanks a lot for any generous help :) Cheers, Arthur
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